1 /* 2 * kmp_runtime.cpp -- KPTS runtime support library 3 */ 4 5 //===----------------------------------------------------------------------===// 6 // 7 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 8 // See https://llvm.org/LICENSE.txt for license information. 9 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 10 // 11 //===----------------------------------------------------------------------===// 12 13 #include "kmp.h" 14 #include "kmp_affinity.h" 15 #include "kmp_atomic.h" 16 #include "kmp_environment.h" 17 #include "kmp_error.h" 18 #include "kmp_i18n.h" 19 #include "kmp_io.h" 20 #include "kmp_itt.h" 21 #include "kmp_settings.h" 22 #include "kmp_stats.h" 23 #include "kmp_str.h" 24 #include "kmp_wait_release.h" 25 #include "kmp_wrapper_getpid.h" 26 #include "kmp_dispatch.h" 27 #if KMP_USE_HIER_SCHED 28 #include "kmp_dispatch_hier.h" 29 #endif 30 31 #if OMPT_SUPPORT 32 #include "ompt-specific.h" 33 #endif 34 35 #if OMP_PROFILING_SUPPORT 36 #include "llvm/Support/TimeProfiler.h" 37 static char *ProfileTraceFile = nullptr; 38 #endif 39 40 /* these are temporary issues to be dealt with */ 41 #define KMP_USE_PRCTL 0 42 43 #if KMP_OS_WINDOWS 44 #include <process.h> 45 #endif 46 47 #include "tsan_annotations.h" 48 49 #if KMP_OS_WINDOWS 50 // windows does not need include files as it doesn't use shared memory 51 #else 52 #include <sys/mman.h> 53 #include <sys/stat.h> 54 #include <fcntl.h> 55 #define SHM_SIZE 1024 56 #endif 57 58 #if defined(KMP_GOMP_COMPAT) 59 char const __kmp_version_alt_comp[] = 60 KMP_VERSION_PREFIX "alternative compiler support: yes"; 61 #endif /* defined(KMP_GOMP_COMPAT) */ 62 63 char const __kmp_version_omp_api[] = 64 KMP_VERSION_PREFIX "API version: 5.0 (201611)"; 65 66 #ifdef KMP_DEBUG 67 char const __kmp_version_lock[] = 68 KMP_VERSION_PREFIX "lock type: run time selectable"; 69 #endif /* KMP_DEBUG */ 70 71 #define KMP_MIN(x, y) ((x) < (y) ? (x) : (y)) 72 73 /* ------------------------------------------------------------------------ */ 74 75 #if KMP_USE_MONITOR 76 kmp_info_t __kmp_monitor; 77 #endif 78 79 /* Forward declarations */ 80 81 void __kmp_cleanup(void); 82 83 static void __kmp_initialize_info(kmp_info_t *, kmp_team_t *, int tid, 84 int gtid); 85 static void __kmp_initialize_team(kmp_team_t *team, int new_nproc, 86 kmp_internal_control_t *new_icvs, 87 ident_t *loc); 88 #if KMP_AFFINITY_SUPPORTED 89 static void __kmp_partition_places(kmp_team_t *team, 90 int update_master_only = 0); 91 #endif 92 static void __kmp_do_serial_initialize(void); 93 void __kmp_fork_barrier(int gtid, int tid); 94 void __kmp_join_barrier(int gtid); 95 void __kmp_setup_icv_copy(kmp_team_t *team, int new_nproc, 96 kmp_internal_control_t *new_icvs, ident_t *loc); 97 98 #ifdef USE_LOAD_BALANCE 99 static int __kmp_load_balance_nproc(kmp_root_t *root, int set_nproc); 100 #endif 101 102 static int __kmp_expand_threads(int nNeed); 103 #if KMP_OS_WINDOWS 104 static int __kmp_unregister_root_other_thread(int gtid); 105 #endif 106 static void __kmp_reap_thread(kmp_info_t *thread, int is_root); 107 kmp_info_t *__kmp_thread_pool_insert_pt = NULL; 108 109 /* Calculate the identifier of the current thread */ 110 /* fast (and somewhat portable) way to get unique identifier of executing 111 thread. Returns KMP_GTID_DNE if we haven't been assigned a gtid. */ 112 int __kmp_get_global_thread_id() { 113 int i; 114 kmp_info_t **other_threads; 115 size_t stack_data; 116 char *stack_addr; 117 size_t stack_size; 118 char *stack_base; 119 120 KA_TRACE( 121 1000, 122 ("*** __kmp_get_global_thread_id: entering, nproc=%d all_nproc=%d\n", 123 __kmp_nth, __kmp_all_nth)); 124 125 /* JPH - to handle the case where __kmpc_end(0) is called immediately prior to 126 a parallel region, made it return KMP_GTID_DNE to force serial_initialize 127 by caller. Had to handle KMP_GTID_DNE at all call-sites, or else guarantee 128 __kmp_init_gtid for this to work. */ 129 130 if (!TCR_4(__kmp_init_gtid)) 131 return KMP_GTID_DNE; 132 133 #ifdef KMP_TDATA_GTID 134 if (TCR_4(__kmp_gtid_mode) >= 3) { 135 KA_TRACE(1000, ("*** __kmp_get_global_thread_id: using TDATA\n")); 136 return __kmp_gtid; 137 } 138 #endif 139 if (TCR_4(__kmp_gtid_mode) >= 2) { 140 KA_TRACE(1000, ("*** __kmp_get_global_thread_id: using keyed TLS\n")); 141 return __kmp_gtid_get_specific(); 142 } 143 KA_TRACE(1000, ("*** __kmp_get_global_thread_id: using internal alg.\n")); 144 145 stack_addr = (char *)&stack_data; 146 other_threads = __kmp_threads; 147 148 /* ATT: The code below is a source of potential bugs due to unsynchronized 149 access to __kmp_threads array. For example: 150 1. Current thread loads other_threads[i] to thr and checks it, it is 151 non-NULL. 152 2. Current thread is suspended by OS. 153 3. Another thread unregisters and finishes (debug versions of free() 154 may fill memory with something like 0xEF). 155 4. Current thread is resumed. 156 5. Current thread reads junk from *thr. 157 TODO: Fix it. --ln */ 158 159 for (i = 0; i < __kmp_threads_capacity; i++) { 160 161 kmp_info_t *thr = (kmp_info_t *)TCR_SYNC_PTR(other_threads[i]); 162 if (!thr) 163 continue; 164 165 stack_size = (size_t)TCR_PTR(thr->th.th_info.ds.ds_stacksize); 166 stack_base = (char *)TCR_PTR(thr->th.th_info.ds.ds_stackbase); 167 168 /* stack grows down -- search through all of the active threads */ 169 170 if (stack_addr <= stack_base) { 171 size_t stack_diff = stack_base - stack_addr; 172 173 if (stack_diff <= stack_size) { 174 /* The only way we can be closer than the allocated */ 175 /* stack size is if we are running on this thread. */ 176 KMP_DEBUG_ASSERT(__kmp_gtid_get_specific() == i); 177 return i; 178 } 179 } 180 } 181 182 /* get specific to try and determine our gtid */ 183 KA_TRACE(1000, 184 ("*** __kmp_get_global_thread_id: internal alg. failed to find " 185 "thread, using TLS\n")); 186 i = __kmp_gtid_get_specific(); 187 188 /*fprintf( stderr, "=== %d\n", i ); */ /* GROO */ 189 190 /* if we havn't been assigned a gtid, then return code */ 191 if (i < 0) 192 return i; 193 194 /* dynamically updated stack window for uber threads to avoid get_specific 195 call */ 196 if (!TCR_4(other_threads[i]->th.th_info.ds.ds_stackgrow)) { 197 KMP_FATAL(StackOverflow, i); 198 } 199 200 stack_base = (char *)other_threads[i]->th.th_info.ds.ds_stackbase; 201 if (stack_addr > stack_base) { 202 TCW_PTR(other_threads[i]->th.th_info.ds.ds_stackbase, stack_addr); 203 TCW_PTR(other_threads[i]->th.th_info.ds.ds_stacksize, 204 other_threads[i]->th.th_info.ds.ds_stacksize + stack_addr - 205 stack_base); 206 } else { 207 TCW_PTR(other_threads[i]->th.th_info.ds.ds_stacksize, 208 stack_base - stack_addr); 209 } 210 211 /* Reprint stack bounds for ubermaster since they have been refined */ 212 if (__kmp_storage_map) { 213 char *stack_end = (char *)other_threads[i]->th.th_info.ds.ds_stackbase; 214 char *stack_beg = stack_end - other_threads[i]->th.th_info.ds.ds_stacksize; 215 __kmp_print_storage_map_gtid(i, stack_beg, stack_end, 216 other_threads[i]->th.th_info.ds.ds_stacksize, 217 "th_%d stack (refinement)", i); 218 } 219 return i; 220 } 221 222 int __kmp_get_global_thread_id_reg() { 223 int gtid; 224 225 if (!__kmp_init_serial) { 226 gtid = KMP_GTID_DNE; 227 } else 228 #ifdef KMP_TDATA_GTID 229 if (TCR_4(__kmp_gtid_mode) >= 3) { 230 KA_TRACE(1000, ("*** __kmp_get_global_thread_id_reg: using TDATA\n")); 231 gtid = __kmp_gtid; 232 } else 233 #endif 234 if (TCR_4(__kmp_gtid_mode) >= 2) { 235 KA_TRACE(1000, ("*** __kmp_get_global_thread_id_reg: using keyed TLS\n")); 236 gtid = __kmp_gtid_get_specific(); 237 } else { 238 KA_TRACE(1000, 239 ("*** __kmp_get_global_thread_id_reg: using internal alg.\n")); 240 gtid = __kmp_get_global_thread_id(); 241 } 242 243 /* we must be a new uber master sibling thread */ 244 if (gtid == KMP_GTID_DNE) { 245 KA_TRACE(10, 246 ("__kmp_get_global_thread_id_reg: Encountered new root thread. " 247 "Registering a new gtid.\n")); 248 __kmp_acquire_bootstrap_lock(&__kmp_initz_lock); 249 if (!__kmp_init_serial) { 250 __kmp_do_serial_initialize(); 251 gtid = __kmp_gtid_get_specific(); 252 } else { 253 gtid = __kmp_register_root(FALSE); 254 } 255 __kmp_release_bootstrap_lock(&__kmp_initz_lock); 256 /*__kmp_printf( "+++ %d\n", gtid ); */ /* GROO */ 257 } 258 259 KMP_DEBUG_ASSERT(gtid >= 0); 260 261 return gtid; 262 } 263 264 /* caller must hold forkjoin_lock */ 265 void __kmp_check_stack_overlap(kmp_info_t *th) { 266 int f; 267 char *stack_beg = NULL; 268 char *stack_end = NULL; 269 int gtid; 270 271 KA_TRACE(10, ("__kmp_check_stack_overlap: called\n")); 272 if (__kmp_storage_map) { 273 stack_end = (char *)th->th.th_info.ds.ds_stackbase; 274 stack_beg = stack_end - th->th.th_info.ds.ds_stacksize; 275 276 gtid = __kmp_gtid_from_thread(th); 277 278 if (gtid == KMP_GTID_MONITOR) { 279 __kmp_print_storage_map_gtid( 280 gtid, stack_beg, stack_end, th->th.th_info.ds.ds_stacksize, 281 "th_%s stack (%s)", "mon", 282 (th->th.th_info.ds.ds_stackgrow) ? "initial" : "actual"); 283 } else { 284 __kmp_print_storage_map_gtid( 285 gtid, stack_beg, stack_end, th->th.th_info.ds.ds_stacksize, 286 "th_%d stack (%s)", gtid, 287 (th->th.th_info.ds.ds_stackgrow) ? "initial" : "actual"); 288 } 289 } 290 291 /* No point in checking ubermaster threads since they use refinement and 292 * cannot overlap */ 293 gtid = __kmp_gtid_from_thread(th); 294 if (__kmp_env_checks == TRUE && !KMP_UBER_GTID(gtid)) { 295 KA_TRACE(10, 296 ("__kmp_check_stack_overlap: performing extensive checking\n")); 297 if (stack_beg == NULL) { 298 stack_end = (char *)th->th.th_info.ds.ds_stackbase; 299 stack_beg = stack_end - th->th.th_info.ds.ds_stacksize; 300 } 301 302 for (f = 0; f < __kmp_threads_capacity; f++) { 303 kmp_info_t *f_th = (kmp_info_t *)TCR_SYNC_PTR(__kmp_threads[f]); 304 305 if (f_th && f_th != th) { 306 char *other_stack_end = 307 (char *)TCR_PTR(f_th->th.th_info.ds.ds_stackbase); 308 char *other_stack_beg = 309 other_stack_end - (size_t)TCR_PTR(f_th->th.th_info.ds.ds_stacksize); 310 if ((stack_beg > other_stack_beg && stack_beg < other_stack_end) || 311 (stack_end > other_stack_beg && stack_end < other_stack_end)) { 312 313 /* Print the other stack values before the abort */ 314 if (__kmp_storage_map) 315 __kmp_print_storage_map_gtid( 316 -1, other_stack_beg, other_stack_end, 317 (size_t)TCR_PTR(f_th->th.th_info.ds.ds_stacksize), 318 "th_%d stack (overlapped)", __kmp_gtid_from_thread(f_th)); 319 320 __kmp_fatal(KMP_MSG(StackOverlap), KMP_HNT(ChangeStackLimit), 321 __kmp_msg_null); 322 } 323 } 324 } 325 } 326 KA_TRACE(10, ("__kmp_check_stack_overlap: returning\n")); 327 } 328 329 /* ------------------------------------------------------------------------ */ 330 331 void __kmp_infinite_loop(void) { 332 static int done = FALSE; 333 334 while (!done) { 335 KMP_YIELD(TRUE); 336 } 337 } 338 339 #define MAX_MESSAGE 512 340 341 void __kmp_print_storage_map_gtid(int gtid, void *p1, void *p2, size_t size, 342 char const *format, ...) { 343 char buffer[MAX_MESSAGE]; 344 va_list ap; 345 346 va_start(ap, format); 347 KMP_SNPRINTF(buffer, sizeof(buffer), "OMP storage map: %p %p%8lu %s\n", p1, 348 p2, (unsigned long)size, format); 349 __kmp_acquire_bootstrap_lock(&__kmp_stdio_lock); 350 __kmp_vprintf(kmp_err, buffer, ap); 351 #if KMP_PRINT_DATA_PLACEMENT 352 int node; 353 if (gtid >= 0) { 354 if (p1 <= p2 && (char *)p2 - (char *)p1 == size) { 355 if (__kmp_storage_map_verbose) { 356 node = __kmp_get_host_node(p1); 357 if (node < 0) /* doesn't work, so don't try this next time */ 358 __kmp_storage_map_verbose = FALSE; 359 else { 360 char *last; 361 int lastNode; 362 int localProc = __kmp_get_cpu_from_gtid(gtid); 363 364 const int page_size = KMP_GET_PAGE_SIZE(); 365 366 p1 = (void *)((size_t)p1 & ~((size_t)page_size - 1)); 367 p2 = (void *)(((size_t)p2 - 1) & ~((size_t)page_size - 1)); 368 if (localProc >= 0) 369 __kmp_printf_no_lock(" GTID %d localNode %d\n", gtid, 370 localProc >> 1); 371 else 372 __kmp_printf_no_lock(" GTID %d\n", gtid); 373 #if KMP_USE_PRCTL 374 /* The more elaborate format is disabled for now because of the prctl 375 * hanging bug. */ 376 do { 377 last = p1; 378 lastNode = node; 379 /* This loop collates adjacent pages with the same host node. */ 380 do { 381 (char *)p1 += page_size; 382 } while (p1 <= p2 && (node = __kmp_get_host_node(p1)) == lastNode); 383 __kmp_printf_no_lock(" %p-%p memNode %d\n", last, (char *)p1 - 1, 384 lastNode); 385 } while (p1 <= p2); 386 #else 387 __kmp_printf_no_lock(" %p-%p memNode %d\n", p1, 388 (char *)p1 + (page_size - 1), 389 __kmp_get_host_node(p1)); 390 if (p1 < p2) { 391 __kmp_printf_no_lock(" %p-%p memNode %d\n", p2, 392 (char *)p2 + (page_size - 1), 393 __kmp_get_host_node(p2)); 394 } 395 #endif 396 } 397 } 398 } else 399 __kmp_printf_no_lock(" %s\n", KMP_I18N_STR(StorageMapWarning)); 400 } 401 #endif /* KMP_PRINT_DATA_PLACEMENT */ 402 __kmp_release_bootstrap_lock(&__kmp_stdio_lock); 403 } 404 405 void __kmp_warn(char const *format, ...) { 406 char buffer[MAX_MESSAGE]; 407 va_list ap; 408 409 if (__kmp_generate_warnings == kmp_warnings_off) { 410 return; 411 } 412 413 va_start(ap, format); 414 415 KMP_SNPRINTF(buffer, sizeof(buffer), "OMP warning: %s\n", format); 416 __kmp_acquire_bootstrap_lock(&__kmp_stdio_lock); 417 __kmp_vprintf(kmp_err, buffer, ap); 418 __kmp_release_bootstrap_lock(&__kmp_stdio_lock); 419 420 va_end(ap); 421 } 422 423 void __kmp_abort_process() { 424 // Later threads may stall here, but that's ok because abort() will kill them. 425 __kmp_acquire_bootstrap_lock(&__kmp_exit_lock); 426 427 if (__kmp_debug_buf) { 428 __kmp_dump_debug_buffer(); 429 } 430 431 if (KMP_OS_WINDOWS) { 432 // Let other threads know of abnormal termination and prevent deadlock 433 // if abort happened during library initialization or shutdown 434 __kmp_global.g.g_abort = SIGABRT; 435 436 /* On Windows* OS by default abort() causes pop-up error box, which stalls 437 nightly testing. Unfortunately, we cannot reliably suppress pop-up error 438 boxes. _set_abort_behavior() works well, but this function is not 439 available in VS7 (this is not problem for DLL, but it is a problem for 440 static OpenMP RTL). SetErrorMode (and so, timelimit utility) does not 441 help, at least in some versions of MS C RTL. 442 443 It seems following sequence is the only way to simulate abort() and 444 avoid pop-up error box. */ 445 raise(SIGABRT); 446 _exit(3); // Just in case, if signal ignored, exit anyway. 447 } else { 448 __kmp_unregister_library(); 449 abort(); 450 } 451 452 __kmp_infinite_loop(); 453 __kmp_release_bootstrap_lock(&__kmp_exit_lock); 454 455 } // __kmp_abort_process 456 457 void __kmp_abort_thread(void) { 458 // TODO: Eliminate g_abort global variable and this function. 459 // In case of abort just call abort(), it will kill all the threads. 460 __kmp_infinite_loop(); 461 } // __kmp_abort_thread 462 463 /* Print out the storage map for the major kmp_info_t thread data structures 464 that are allocated together. */ 465 466 static void __kmp_print_thread_storage_map(kmp_info_t *thr, int gtid) { 467 __kmp_print_storage_map_gtid(gtid, thr, thr + 1, sizeof(kmp_info_t), "th_%d", 468 gtid); 469 470 __kmp_print_storage_map_gtid(gtid, &thr->th.th_info, &thr->th.th_team, 471 sizeof(kmp_desc_t), "th_%d.th_info", gtid); 472 473 __kmp_print_storage_map_gtid(gtid, &thr->th.th_local, &thr->th.th_pri_head, 474 sizeof(kmp_local_t), "th_%d.th_local", gtid); 475 476 __kmp_print_storage_map_gtid( 477 gtid, &thr->th.th_bar[0], &thr->th.th_bar[bs_last_barrier], 478 sizeof(kmp_balign_t) * bs_last_barrier, "th_%d.th_bar", gtid); 479 480 __kmp_print_storage_map_gtid(gtid, &thr->th.th_bar[bs_plain_barrier], 481 &thr->th.th_bar[bs_plain_barrier + 1], 482 sizeof(kmp_balign_t), "th_%d.th_bar[plain]", 483 gtid); 484 485 __kmp_print_storage_map_gtid(gtid, &thr->th.th_bar[bs_forkjoin_barrier], 486 &thr->th.th_bar[bs_forkjoin_barrier + 1], 487 sizeof(kmp_balign_t), "th_%d.th_bar[forkjoin]", 488 gtid); 489 490 #if KMP_FAST_REDUCTION_BARRIER 491 __kmp_print_storage_map_gtid(gtid, &thr->th.th_bar[bs_reduction_barrier], 492 &thr->th.th_bar[bs_reduction_barrier + 1], 493 sizeof(kmp_balign_t), "th_%d.th_bar[reduction]", 494 gtid); 495 #endif // KMP_FAST_REDUCTION_BARRIER 496 } 497 498 /* Print out the storage map for the major kmp_team_t team data structures 499 that are allocated together. */ 500 501 static void __kmp_print_team_storage_map(const char *header, kmp_team_t *team, 502 int team_id, int num_thr) { 503 int num_disp_buff = team->t.t_max_nproc > 1 ? __kmp_dispatch_num_buffers : 2; 504 __kmp_print_storage_map_gtid(-1, team, team + 1, sizeof(kmp_team_t), "%s_%d", 505 header, team_id); 506 507 __kmp_print_storage_map_gtid(-1, &team->t.t_bar[0], 508 &team->t.t_bar[bs_last_barrier], 509 sizeof(kmp_balign_team_t) * bs_last_barrier, 510 "%s_%d.t_bar", header, team_id); 511 512 __kmp_print_storage_map_gtid(-1, &team->t.t_bar[bs_plain_barrier], 513 &team->t.t_bar[bs_plain_barrier + 1], 514 sizeof(kmp_balign_team_t), "%s_%d.t_bar[plain]", 515 header, team_id); 516 517 __kmp_print_storage_map_gtid(-1, &team->t.t_bar[bs_forkjoin_barrier], 518 &team->t.t_bar[bs_forkjoin_barrier + 1], 519 sizeof(kmp_balign_team_t), 520 "%s_%d.t_bar[forkjoin]", header, team_id); 521 522 #if KMP_FAST_REDUCTION_BARRIER 523 __kmp_print_storage_map_gtid(-1, &team->t.t_bar[bs_reduction_barrier], 524 &team->t.t_bar[bs_reduction_barrier + 1], 525 sizeof(kmp_balign_team_t), 526 "%s_%d.t_bar[reduction]", header, team_id); 527 #endif // KMP_FAST_REDUCTION_BARRIER 528 529 __kmp_print_storage_map_gtid( 530 -1, &team->t.t_dispatch[0], &team->t.t_dispatch[num_thr], 531 sizeof(kmp_disp_t) * num_thr, "%s_%d.t_dispatch", header, team_id); 532 533 __kmp_print_storage_map_gtid( 534 -1, &team->t.t_threads[0], &team->t.t_threads[num_thr], 535 sizeof(kmp_info_t *) * num_thr, "%s_%d.t_threads", header, team_id); 536 537 __kmp_print_storage_map_gtid(-1, &team->t.t_disp_buffer[0], 538 &team->t.t_disp_buffer[num_disp_buff], 539 sizeof(dispatch_shared_info_t) * num_disp_buff, 540 "%s_%d.t_disp_buffer", header, team_id); 541 } 542 543 static void __kmp_init_allocator() { __kmp_init_memkind(); } 544 static void __kmp_fini_allocator() { __kmp_fini_memkind(); } 545 546 /* ------------------------------------------------------------------------ */ 547 548 #if KMP_DYNAMIC_LIB 549 #if KMP_OS_WINDOWS 550 551 static void __kmp_reset_lock(kmp_bootstrap_lock_t *lck) { 552 // TODO: Change to __kmp_break_bootstrap_lock(). 553 __kmp_init_bootstrap_lock(lck); // make the lock released 554 } 555 556 static void __kmp_reset_locks_on_process_detach(int gtid_req) { 557 int i; 558 int thread_count; 559 560 // PROCESS_DETACH is expected to be called by a thread that executes 561 // ProcessExit() or FreeLibrary(). OS terminates other threads (except the one 562 // calling ProcessExit or FreeLibrary). So, it might be safe to access the 563 // __kmp_threads[] without taking the forkjoin_lock. However, in fact, some 564 // threads can be still alive here, although being about to be terminated. The 565 // threads in the array with ds_thread==0 are most suspicious. Actually, it 566 // can be not safe to access the __kmp_threads[]. 567 568 // TODO: does it make sense to check __kmp_roots[] ? 569 570 // Let's check that there are no other alive threads registered with the OMP 571 // lib. 572 while (1) { 573 thread_count = 0; 574 for (i = 0; i < __kmp_threads_capacity; ++i) { 575 if (!__kmp_threads) 576 continue; 577 kmp_info_t *th = __kmp_threads[i]; 578 if (th == NULL) 579 continue; 580 int gtid = th->th.th_info.ds.ds_gtid; 581 if (gtid == gtid_req) 582 continue; 583 if (gtid < 0) 584 continue; 585 DWORD exit_val; 586 int alive = __kmp_is_thread_alive(th, &exit_val); 587 if (alive) { 588 ++thread_count; 589 } 590 } 591 if (thread_count == 0) 592 break; // success 593 } 594 595 // Assume that I'm alone. Now it might be safe to check and reset locks. 596 // __kmp_forkjoin_lock and __kmp_stdio_lock are expected to be reset. 597 __kmp_reset_lock(&__kmp_forkjoin_lock); 598 #ifdef KMP_DEBUG 599 __kmp_reset_lock(&__kmp_stdio_lock); 600 #endif // KMP_DEBUG 601 } 602 603 BOOL WINAPI DllMain(HINSTANCE hInstDLL, DWORD fdwReason, LPVOID lpReserved) { 604 //__kmp_acquire_bootstrap_lock( &__kmp_initz_lock ); 605 606 switch (fdwReason) { 607 608 case DLL_PROCESS_ATTACH: 609 KA_TRACE(10, ("DllMain: PROCESS_ATTACH\n")); 610 611 return TRUE; 612 613 case DLL_PROCESS_DETACH: 614 KA_TRACE(10, ("DllMain: PROCESS_DETACH T#%d\n", __kmp_gtid_get_specific())); 615 616 if (lpReserved != NULL) { 617 // lpReserved is used for telling the difference: 618 // lpReserved == NULL when FreeLibrary() was called, 619 // lpReserved != NULL when the process terminates. 620 // When FreeLibrary() is called, worker threads remain alive. So they will 621 // release the forkjoin lock by themselves. When the process terminates, 622 // worker threads disappear triggering the problem of unreleased forkjoin 623 // lock as described below. 624 625 // A worker thread can take the forkjoin lock. The problem comes up if 626 // that worker thread becomes dead before it releases the forkjoin lock. 627 // The forkjoin lock remains taken, while the thread executing 628 // DllMain()->PROCESS_DETACH->__kmp_internal_end_library() below will try 629 // to take the forkjoin lock and will always fail, so that the application 630 // will never finish [normally]. This scenario is possible if 631 // __kmpc_end() has not been executed. It looks like it's not a corner 632 // case, but common cases: 633 // - the main function was compiled by an alternative compiler; 634 // - the main function was compiled by icl but without /Qopenmp 635 // (application with plugins); 636 // - application terminates by calling C exit(), Fortran CALL EXIT() or 637 // Fortran STOP. 638 // - alive foreign thread prevented __kmpc_end from doing cleanup. 639 // 640 // This is a hack to work around the problem. 641 // TODO: !!! figure out something better. 642 __kmp_reset_locks_on_process_detach(__kmp_gtid_get_specific()); 643 } 644 645 __kmp_internal_end_library(__kmp_gtid_get_specific()); 646 647 return TRUE; 648 649 case DLL_THREAD_ATTACH: 650 KA_TRACE(10, ("DllMain: THREAD_ATTACH\n")); 651 652 /* if we want to register new siblings all the time here call 653 * __kmp_get_gtid(); */ 654 return TRUE; 655 656 case DLL_THREAD_DETACH: 657 KA_TRACE(10, ("DllMain: THREAD_DETACH T#%d\n", __kmp_gtid_get_specific())); 658 659 __kmp_internal_end_thread(__kmp_gtid_get_specific()); 660 return TRUE; 661 } 662 663 return TRUE; 664 } 665 666 #endif /* KMP_OS_WINDOWS */ 667 #endif /* KMP_DYNAMIC_LIB */ 668 669 /* __kmp_parallel_deo -- Wait until it's our turn. */ 670 void __kmp_parallel_deo(int *gtid_ref, int *cid_ref, ident_t *loc_ref) { 671 int gtid = *gtid_ref; 672 #ifdef BUILD_PARALLEL_ORDERED 673 kmp_team_t *team = __kmp_team_from_gtid(gtid); 674 #endif /* BUILD_PARALLEL_ORDERED */ 675 676 if (__kmp_env_consistency_check) { 677 if (__kmp_threads[gtid]->th.th_root->r.r_active) 678 #if KMP_USE_DYNAMIC_LOCK 679 __kmp_push_sync(gtid, ct_ordered_in_parallel, loc_ref, NULL, 0); 680 #else 681 __kmp_push_sync(gtid, ct_ordered_in_parallel, loc_ref, NULL); 682 #endif 683 } 684 #ifdef BUILD_PARALLEL_ORDERED 685 if (!team->t.t_serialized) { 686 KMP_MB(); 687 KMP_WAIT(&team->t.t_ordered.dt.t_value, __kmp_tid_from_gtid(gtid), KMP_EQ, 688 NULL); 689 KMP_MB(); 690 } 691 #endif /* BUILD_PARALLEL_ORDERED */ 692 } 693 694 /* __kmp_parallel_dxo -- Signal the next task. */ 695 void __kmp_parallel_dxo(int *gtid_ref, int *cid_ref, ident_t *loc_ref) { 696 int gtid = *gtid_ref; 697 #ifdef BUILD_PARALLEL_ORDERED 698 int tid = __kmp_tid_from_gtid(gtid); 699 kmp_team_t *team = __kmp_team_from_gtid(gtid); 700 #endif /* BUILD_PARALLEL_ORDERED */ 701 702 if (__kmp_env_consistency_check) { 703 if (__kmp_threads[gtid]->th.th_root->r.r_active) 704 __kmp_pop_sync(gtid, ct_ordered_in_parallel, loc_ref); 705 } 706 #ifdef BUILD_PARALLEL_ORDERED 707 if (!team->t.t_serialized) { 708 KMP_MB(); /* Flush all pending memory write invalidates. */ 709 710 /* use the tid of the next thread in this team */ 711 /* TODO replace with general release procedure */ 712 team->t.t_ordered.dt.t_value = ((tid + 1) % team->t.t_nproc); 713 714 KMP_MB(); /* Flush all pending memory write invalidates. */ 715 } 716 #endif /* BUILD_PARALLEL_ORDERED */ 717 } 718 719 /* ------------------------------------------------------------------------ */ 720 /* The BARRIER for a SINGLE process section is always explicit */ 721 722 int __kmp_enter_single(int gtid, ident_t *id_ref, int push_ws) { 723 int status; 724 kmp_info_t *th; 725 kmp_team_t *team; 726 727 if (!TCR_4(__kmp_init_parallel)) 728 __kmp_parallel_initialize(); 729 __kmp_resume_if_soft_paused(); 730 731 th = __kmp_threads[gtid]; 732 team = th->th.th_team; 733 status = 0; 734 735 th->th.th_ident = id_ref; 736 737 if (team->t.t_serialized) { 738 status = 1; 739 } else { 740 kmp_int32 old_this = th->th.th_local.this_construct; 741 742 ++th->th.th_local.this_construct; 743 /* try to set team count to thread count--success means thread got the 744 single block */ 745 /* TODO: Should this be acquire or release? */ 746 if (team->t.t_construct == old_this) { 747 status = __kmp_atomic_compare_store_acq(&team->t.t_construct, old_this, 748 th->th.th_local.this_construct); 749 } 750 #if USE_ITT_BUILD 751 if (__itt_metadata_add_ptr && __kmp_forkjoin_frames_mode == 3 && 752 KMP_MASTER_GTID(gtid) && th->th.th_teams_microtask == NULL && 753 team->t.t_active_level == 754 1) { // Only report metadata by master of active team at level 1 755 __kmp_itt_metadata_single(id_ref); 756 } 757 #endif /* USE_ITT_BUILD */ 758 } 759 760 if (__kmp_env_consistency_check) { 761 if (status && push_ws) { 762 __kmp_push_workshare(gtid, ct_psingle, id_ref); 763 } else { 764 __kmp_check_workshare(gtid, ct_psingle, id_ref); 765 } 766 } 767 #if USE_ITT_BUILD 768 if (status) { 769 __kmp_itt_single_start(gtid); 770 } 771 #endif /* USE_ITT_BUILD */ 772 return status; 773 } 774 775 void __kmp_exit_single(int gtid) { 776 #if USE_ITT_BUILD 777 __kmp_itt_single_end(gtid); 778 #endif /* USE_ITT_BUILD */ 779 if (__kmp_env_consistency_check) 780 __kmp_pop_workshare(gtid, ct_psingle, NULL); 781 } 782 783 /* determine if we can go parallel or must use a serialized parallel region and 784 * how many threads we can use 785 * set_nproc is the number of threads requested for the team 786 * returns 0 if we should serialize or only use one thread, 787 * otherwise the number of threads to use 788 * The forkjoin lock is held by the caller. */ 789 static int __kmp_reserve_threads(kmp_root_t *root, kmp_team_t *parent_team, 790 int master_tid, int set_nthreads, 791 int enter_teams) { 792 int capacity; 793 int new_nthreads; 794 KMP_DEBUG_ASSERT(__kmp_init_serial); 795 KMP_DEBUG_ASSERT(root && parent_team); 796 kmp_info_t *this_thr = parent_team->t.t_threads[master_tid]; 797 798 // If dyn-var is set, dynamically adjust the number of desired threads, 799 // according to the method specified by dynamic_mode. 800 new_nthreads = set_nthreads; 801 if (!get__dynamic_2(parent_team, master_tid)) { 802 ; 803 } 804 #ifdef USE_LOAD_BALANCE 805 else if (__kmp_global.g.g_dynamic_mode == dynamic_load_balance) { 806 new_nthreads = __kmp_load_balance_nproc(root, set_nthreads); 807 if (new_nthreads == 1) { 808 KC_TRACE(10, ("__kmp_reserve_threads: T#%d load balance reduced " 809 "reservation to 1 thread\n", 810 master_tid)); 811 return 1; 812 } 813 if (new_nthreads < set_nthreads) { 814 KC_TRACE(10, ("__kmp_reserve_threads: T#%d load balance reduced " 815 "reservation to %d threads\n", 816 master_tid, new_nthreads)); 817 } 818 } 819 #endif /* USE_LOAD_BALANCE */ 820 else if (__kmp_global.g.g_dynamic_mode == dynamic_thread_limit) { 821 new_nthreads = __kmp_avail_proc - __kmp_nth + 822 (root->r.r_active ? 1 : root->r.r_hot_team->t.t_nproc); 823 if (new_nthreads <= 1) { 824 KC_TRACE(10, ("__kmp_reserve_threads: T#%d thread limit reduced " 825 "reservation to 1 thread\n", 826 master_tid)); 827 return 1; 828 } 829 if (new_nthreads < set_nthreads) { 830 KC_TRACE(10, ("__kmp_reserve_threads: T#%d thread limit reduced " 831 "reservation to %d threads\n", 832 master_tid, new_nthreads)); 833 } else { 834 new_nthreads = set_nthreads; 835 } 836 } else if (__kmp_global.g.g_dynamic_mode == dynamic_random) { 837 if (set_nthreads > 2) { 838 new_nthreads = __kmp_get_random(parent_team->t.t_threads[master_tid]); 839 new_nthreads = (new_nthreads % set_nthreads) + 1; 840 if (new_nthreads == 1) { 841 KC_TRACE(10, ("__kmp_reserve_threads: T#%d dynamic random reduced " 842 "reservation to 1 thread\n", 843 master_tid)); 844 return 1; 845 } 846 if (new_nthreads < set_nthreads) { 847 KC_TRACE(10, ("__kmp_reserve_threads: T#%d dynamic random reduced " 848 "reservation to %d threads\n", 849 master_tid, new_nthreads)); 850 } 851 } 852 } else { 853 KMP_ASSERT(0); 854 } 855 856 // Respect KMP_ALL_THREADS/KMP_DEVICE_THREAD_LIMIT. 857 if (__kmp_nth + new_nthreads - 858 (root->r.r_active ? 1 : root->r.r_hot_team->t.t_nproc) > 859 __kmp_max_nth) { 860 int tl_nthreads = __kmp_max_nth - __kmp_nth + 861 (root->r.r_active ? 1 : root->r.r_hot_team->t.t_nproc); 862 if (tl_nthreads <= 0) { 863 tl_nthreads = 1; 864 } 865 866 // If dyn-var is false, emit a 1-time warning. 867 if (!get__dynamic_2(parent_team, master_tid) && (!__kmp_reserve_warn)) { 868 __kmp_reserve_warn = 1; 869 __kmp_msg(kmp_ms_warning, 870 KMP_MSG(CantFormThrTeam, set_nthreads, tl_nthreads), 871 KMP_HNT(Unset_ALL_THREADS), __kmp_msg_null); 872 } 873 if (tl_nthreads == 1) { 874 KC_TRACE(10, ("__kmp_reserve_threads: T#%d KMP_DEVICE_THREAD_LIMIT " 875 "reduced reservation to 1 thread\n", 876 master_tid)); 877 return 1; 878 } 879 KC_TRACE(10, ("__kmp_reserve_threads: T#%d KMP_DEVICE_THREAD_LIMIT reduced " 880 "reservation to %d threads\n", 881 master_tid, tl_nthreads)); 882 new_nthreads = tl_nthreads; 883 } 884 885 // Respect OMP_THREAD_LIMIT 886 int cg_nthreads = this_thr->th.th_cg_roots->cg_nthreads; 887 int max_cg_threads = this_thr->th.th_cg_roots->cg_thread_limit; 888 if (cg_nthreads + new_nthreads - 889 (root->r.r_active ? 1 : root->r.r_hot_team->t.t_nproc) > 890 max_cg_threads) { 891 int tl_nthreads = max_cg_threads - cg_nthreads + 892 (root->r.r_active ? 1 : root->r.r_hot_team->t.t_nproc); 893 if (tl_nthreads <= 0) { 894 tl_nthreads = 1; 895 } 896 897 // If dyn-var is false, emit a 1-time warning. 898 if (!get__dynamic_2(parent_team, master_tid) && (!__kmp_reserve_warn)) { 899 __kmp_reserve_warn = 1; 900 __kmp_msg(kmp_ms_warning, 901 KMP_MSG(CantFormThrTeam, set_nthreads, tl_nthreads), 902 KMP_HNT(Unset_ALL_THREADS), __kmp_msg_null); 903 } 904 if (tl_nthreads == 1) { 905 KC_TRACE(10, ("__kmp_reserve_threads: T#%d OMP_THREAD_LIMIT " 906 "reduced reservation to 1 thread\n", 907 master_tid)); 908 return 1; 909 } 910 KC_TRACE(10, ("__kmp_reserve_threads: T#%d OMP_THREAD_LIMIT reduced " 911 "reservation to %d threads\n", 912 master_tid, tl_nthreads)); 913 new_nthreads = tl_nthreads; 914 } 915 916 // Check if the threads array is large enough, or needs expanding. 917 // See comment in __kmp_register_root() about the adjustment if 918 // __kmp_threads[0] == NULL. 919 capacity = __kmp_threads_capacity; 920 if (TCR_PTR(__kmp_threads[0]) == NULL) { 921 --capacity; 922 } 923 // If it is not for initializing the hidden helper team, we need to take 924 // __kmp_hidden_helper_threads_num out of the capacity because it is included 925 // in __kmp_threads_capacity. 926 if (__kmp_enable_hidden_helper && !TCR_4(__kmp_init_hidden_helper_threads)) { 927 capacity -= __kmp_hidden_helper_threads_num; 928 } 929 if (__kmp_nth + new_nthreads - 930 (root->r.r_active ? 1 : root->r.r_hot_team->t.t_nproc) > 931 capacity) { 932 // Expand the threads array. 933 int slotsRequired = __kmp_nth + new_nthreads - 934 (root->r.r_active ? 1 : root->r.r_hot_team->t.t_nproc) - 935 capacity; 936 int slotsAdded = __kmp_expand_threads(slotsRequired); 937 if (slotsAdded < slotsRequired) { 938 // The threads array was not expanded enough. 939 new_nthreads -= (slotsRequired - slotsAdded); 940 KMP_ASSERT(new_nthreads >= 1); 941 942 // If dyn-var is false, emit a 1-time warning. 943 if (!get__dynamic_2(parent_team, master_tid) && (!__kmp_reserve_warn)) { 944 __kmp_reserve_warn = 1; 945 if (__kmp_tp_cached) { 946 __kmp_msg(kmp_ms_warning, 947 KMP_MSG(CantFormThrTeam, set_nthreads, new_nthreads), 948 KMP_HNT(Set_ALL_THREADPRIVATE, __kmp_tp_capacity), 949 KMP_HNT(PossibleSystemLimitOnThreads), __kmp_msg_null); 950 } else { 951 __kmp_msg(kmp_ms_warning, 952 KMP_MSG(CantFormThrTeam, set_nthreads, new_nthreads), 953 KMP_HNT(SystemLimitOnThreads), __kmp_msg_null); 954 } 955 } 956 } 957 } 958 959 #ifdef KMP_DEBUG 960 if (new_nthreads == 1) { 961 KC_TRACE(10, 962 ("__kmp_reserve_threads: T#%d serializing team after reclaiming " 963 "dead roots and rechecking; requested %d threads\n", 964 __kmp_get_gtid(), set_nthreads)); 965 } else { 966 KC_TRACE(10, ("__kmp_reserve_threads: T#%d allocating %d threads; requested" 967 " %d threads\n", 968 __kmp_get_gtid(), new_nthreads, set_nthreads)); 969 } 970 #endif // KMP_DEBUG 971 return new_nthreads; 972 } 973 974 /* Allocate threads from the thread pool and assign them to the new team. We are 975 assured that there are enough threads available, because we checked on that 976 earlier within critical section forkjoin */ 977 static void __kmp_fork_team_threads(kmp_root_t *root, kmp_team_t *team, 978 kmp_info_t *master_th, int master_gtid) { 979 int i; 980 int use_hot_team; 981 982 KA_TRACE(10, ("__kmp_fork_team_threads: new_nprocs = %d\n", team->t.t_nproc)); 983 KMP_DEBUG_ASSERT(master_gtid == __kmp_get_gtid()); 984 KMP_MB(); 985 986 /* first, let's setup the master thread */ 987 master_th->th.th_info.ds.ds_tid = 0; 988 master_th->th.th_team = team; 989 master_th->th.th_team_nproc = team->t.t_nproc; 990 master_th->th.th_team_master = master_th; 991 master_th->th.th_team_serialized = FALSE; 992 master_th->th.th_dispatch = &team->t.t_dispatch[0]; 993 994 /* make sure we are not the optimized hot team */ 995 #if KMP_NESTED_HOT_TEAMS 996 use_hot_team = 0; 997 kmp_hot_team_ptr_t *hot_teams = master_th->th.th_hot_teams; 998 if (hot_teams) { // hot teams array is not allocated if 999 // KMP_HOT_TEAMS_MAX_LEVEL=0 1000 int level = team->t.t_active_level - 1; // index in array of hot teams 1001 if (master_th->th.th_teams_microtask) { // are we inside the teams? 1002 if (master_th->th.th_teams_size.nteams > 1) { 1003 ++level; // level was not increased in teams construct for 1004 // team_of_masters 1005 } 1006 if (team->t.t_pkfn != (microtask_t)__kmp_teams_master && 1007 master_th->th.th_teams_level == team->t.t_level) { 1008 ++level; // level was not increased in teams construct for 1009 // team_of_workers before the parallel 1010 } // team->t.t_level will be increased inside parallel 1011 } 1012 if (level < __kmp_hot_teams_max_level) { 1013 if (hot_teams[level].hot_team) { 1014 // hot team has already been allocated for given level 1015 KMP_DEBUG_ASSERT(hot_teams[level].hot_team == team); 1016 use_hot_team = 1; // the team is ready to use 1017 } else { 1018 use_hot_team = 0; // AC: threads are not allocated yet 1019 hot_teams[level].hot_team = team; // remember new hot team 1020 hot_teams[level].hot_team_nth = team->t.t_nproc; 1021 } 1022 } else { 1023 use_hot_team = 0; 1024 } 1025 } 1026 #else 1027 use_hot_team = team == root->r.r_hot_team; 1028 #endif 1029 if (!use_hot_team) { 1030 1031 /* install the master thread */ 1032 team->t.t_threads[0] = master_th; 1033 __kmp_initialize_info(master_th, team, 0, master_gtid); 1034 1035 /* now, install the worker threads */ 1036 for (i = 1; i < team->t.t_nproc; i++) { 1037 1038 /* fork or reallocate a new thread and install it in team */ 1039 kmp_info_t *thr = __kmp_allocate_thread(root, team, i); 1040 team->t.t_threads[i] = thr; 1041 KMP_DEBUG_ASSERT(thr); 1042 KMP_DEBUG_ASSERT(thr->th.th_team == team); 1043 /* align team and thread arrived states */ 1044 KA_TRACE(20, ("__kmp_fork_team_threads: T#%d(%d:%d) init arrived " 1045 "T#%d(%d:%d) join =%llu, plain=%llu\n", 1046 __kmp_gtid_from_tid(0, team), team->t.t_id, 0, 1047 __kmp_gtid_from_tid(i, team), team->t.t_id, i, 1048 team->t.t_bar[bs_forkjoin_barrier].b_arrived, 1049 team->t.t_bar[bs_plain_barrier].b_arrived)); 1050 thr->th.th_teams_microtask = master_th->th.th_teams_microtask; 1051 thr->th.th_teams_level = master_th->th.th_teams_level; 1052 thr->th.th_teams_size = master_th->th.th_teams_size; 1053 { // Initialize threads' barrier data. 1054 int b; 1055 kmp_balign_t *balign = team->t.t_threads[i]->th.th_bar; 1056 for (b = 0; b < bs_last_barrier; ++b) { 1057 balign[b].bb.b_arrived = team->t.t_bar[b].b_arrived; 1058 KMP_DEBUG_ASSERT(balign[b].bb.wait_flag != KMP_BARRIER_PARENT_FLAG); 1059 #if USE_DEBUGGER 1060 balign[b].bb.b_worker_arrived = team->t.t_bar[b].b_team_arrived; 1061 #endif 1062 } 1063 } 1064 } 1065 1066 #if KMP_AFFINITY_SUPPORTED 1067 __kmp_partition_places(team); 1068 #endif 1069 } 1070 1071 if (__kmp_display_affinity && team->t.t_display_affinity != 1) { 1072 for (i = 0; i < team->t.t_nproc; i++) { 1073 kmp_info_t *thr = team->t.t_threads[i]; 1074 if (thr->th.th_prev_num_threads != team->t.t_nproc || 1075 thr->th.th_prev_level != team->t.t_level) { 1076 team->t.t_display_affinity = 1; 1077 break; 1078 } 1079 } 1080 } 1081 1082 KMP_MB(); 1083 } 1084 1085 #if KMP_ARCH_X86 || KMP_ARCH_X86_64 1086 // Propagate any changes to the floating point control registers out to the team 1087 // We try to avoid unnecessary writes to the relevant cache line in the team 1088 // structure, so we don't make changes unless they are needed. 1089 inline static void propagateFPControl(kmp_team_t *team) { 1090 if (__kmp_inherit_fp_control) { 1091 kmp_int16 x87_fpu_control_word; 1092 kmp_uint32 mxcsr; 1093 1094 // Get master values of FPU control flags (both X87 and vector) 1095 __kmp_store_x87_fpu_control_word(&x87_fpu_control_word); 1096 __kmp_store_mxcsr(&mxcsr); 1097 mxcsr &= KMP_X86_MXCSR_MASK; 1098 1099 // There is no point looking at t_fp_control_saved here. 1100 // If it is TRUE, we still have to update the values if they are different 1101 // from those we now have. If it is FALSE we didn't save anything yet, but 1102 // our objective is the same. We have to ensure that the values in the team 1103 // are the same as those we have. 1104 // So, this code achieves what we need whether or not t_fp_control_saved is 1105 // true. By checking whether the value needs updating we avoid unnecessary 1106 // writes that would put the cache-line into a written state, causing all 1107 // threads in the team to have to read it again. 1108 KMP_CHECK_UPDATE(team->t.t_x87_fpu_control_word, x87_fpu_control_word); 1109 KMP_CHECK_UPDATE(team->t.t_mxcsr, mxcsr); 1110 // Although we don't use this value, other code in the runtime wants to know 1111 // whether it should restore them. So we must ensure it is correct. 1112 KMP_CHECK_UPDATE(team->t.t_fp_control_saved, TRUE); 1113 } else { 1114 // Similarly here. Don't write to this cache-line in the team structure 1115 // unless we have to. 1116 KMP_CHECK_UPDATE(team->t.t_fp_control_saved, FALSE); 1117 } 1118 } 1119 1120 // Do the opposite, setting the hardware registers to the updated values from 1121 // the team. 1122 inline static void updateHWFPControl(kmp_team_t *team) { 1123 if (__kmp_inherit_fp_control && team->t.t_fp_control_saved) { 1124 // Only reset the fp control regs if they have been changed in the team. 1125 // the parallel region that we are exiting. 1126 kmp_int16 x87_fpu_control_word; 1127 kmp_uint32 mxcsr; 1128 __kmp_store_x87_fpu_control_word(&x87_fpu_control_word); 1129 __kmp_store_mxcsr(&mxcsr); 1130 mxcsr &= KMP_X86_MXCSR_MASK; 1131 1132 if (team->t.t_x87_fpu_control_word != x87_fpu_control_word) { 1133 __kmp_clear_x87_fpu_status_word(); 1134 __kmp_load_x87_fpu_control_word(&team->t.t_x87_fpu_control_word); 1135 } 1136 1137 if (team->t.t_mxcsr != mxcsr) { 1138 __kmp_load_mxcsr(&team->t.t_mxcsr); 1139 } 1140 } 1141 } 1142 #else 1143 #define propagateFPControl(x) ((void)0) 1144 #define updateHWFPControl(x) ((void)0) 1145 #endif /* KMP_ARCH_X86 || KMP_ARCH_X86_64 */ 1146 1147 static void __kmp_alloc_argv_entries(int argc, kmp_team_t *team, 1148 int realloc); // forward declaration 1149 1150 /* Run a parallel region that has been serialized, so runs only in a team of the 1151 single master thread. */ 1152 void __kmp_serialized_parallel(ident_t *loc, kmp_int32 global_tid) { 1153 kmp_info_t *this_thr; 1154 kmp_team_t *serial_team; 1155 1156 KC_TRACE(10, ("__kmpc_serialized_parallel: called by T#%d\n", global_tid)); 1157 1158 /* Skip all this code for autopar serialized loops since it results in 1159 unacceptable overhead */ 1160 if (loc != NULL && (loc->flags & KMP_IDENT_AUTOPAR)) 1161 return; 1162 1163 if (!TCR_4(__kmp_init_parallel)) 1164 __kmp_parallel_initialize(); 1165 __kmp_resume_if_soft_paused(); 1166 1167 this_thr = __kmp_threads[global_tid]; 1168 serial_team = this_thr->th.th_serial_team; 1169 1170 /* utilize the serialized team held by this thread */ 1171 KMP_DEBUG_ASSERT(serial_team); 1172 KMP_MB(); 1173 1174 if (__kmp_tasking_mode != tskm_immediate_exec) { 1175 KMP_DEBUG_ASSERT( 1176 this_thr->th.th_task_team == 1177 this_thr->th.th_team->t.t_task_team[this_thr->th.th_task_state]); 1178 KMP_DEBUG_ASSERT(serial_team->t.t_task_team[this_thr->th.th_task_state] == 1179 NULL); 1180 KA_TRACE(20, ("__kmpc_serialized_parallel: T#%d pushing task_team %p / " 1181 "team %p, new task_team = NULL\n", 1182 global_tid, this_thr->th.th_task_team, this_thr->th.th_team)); 1183 this_thr->th.th_task_team = NULL; 1184 } 1185 1186 kmp_proc_bind_t proc_bind = this_thr->th.th_set_proc_bind; 1187 if (this_thr->th.th_current_task->td_icvs.proc_bind == proc_bind_false) { 1188 proc_bind = proc_bind_false; 1189 } else if (proc_bind == proc_bind_default) { 1190 // No proc_bind clause was specified, so use the current value 1191 // of proc-bind-var for this parallel region. 1192 proc_bind = this_thr->th.th_current_task->td_icvs.proc_bind; 1193 } 1194 // Reset for next parallel region 1195 this_thr->th.th_set_proc_bind = proc_bind_default; 1196 1197 #if OMPT_SUPPORT 1198 ompt_data_t ompt_parallel_data = ompt_data_none; 1199 ompt_data_t *implicit_task_data; 1200 void *codeptr = OMPT_LOAD_RETURN_ADDRESS(global_tid); 1201 if (ompt_enabled.enabled && 1202 this_thr->th.ompt_thread_info.state != ompt_state_overhead) { 1203 1204 ompt_task_info_t *parent_task_info; 1205 parent_task_info = OMPT_CUR_TASK_INFO(this_thr); 1206 1207 parent_task_info->frame.enter_frame.ptr = OMPT_GET_FRAME_ADDRESS(0); 1208 if (ompt_enabled.ompt_callback_parallel_begin) { 1209 int team_size = 1; 1210 1211 ompt_callbacks.ompt_callback(ompt_callback_parallel_begin)( 1212 &(parent_task_info->task_data), &(parent_task_info->frame), 1213 &ompt_parallel_data, team_size, 1214 ompt_parallel_invoker_program | ompt_parallel_team, codeptr); 1215 } 1216 } 1217 #endif // OMPT_SUPPORT 1218 1219 if (this_thr->th.th_team != serial_team) { 1220 // Nested level will be an index in the nested nthreads array 1221 int level = this_thr->th.th_team->t.t_level; 1222 1223 if (serial_team->t.t_serialized) { 1224 /* this serial team was already used 1225 TODO increase performance by making this locks more specific */ 1226 kmp_team_t *new_team; 1227 1228 __kmp_acquire_bootstrap_lock(&__kmp_forkjoin_lock); 1229 1230 new_team = 1231 __kmp_allocate_team(this_thr->th.th_root, 1, 1, 1232 #if OMPT_SUPPORT 1233 ompt_parallel_data, 1234 #endif 1235 proc_bind, &this_thr->th.th_current_task->td_icvs, 1236 0 USE_NESTED_HOT_ARG(NULL)); 1237 __kmp_release_bootstrap_lock(&__kmp_forkjoin_lock); 1238 KMP_ASSERT(new_team); 1239 1240 /* setup new serialized team and install it */ 1241 new_team->t.t_threads[0] = this_thr; 1242 new_team->t.t_parent = this_thr->th.th_team; 1243 serial_team = new_team; 1244 this_thr->th.th_serial_team = serial_team; 1245 1246 KF_TRACE( 1247 10, 1248 ("__kmpc_serialized_parallel: T#%d allocated new serial team %p\n", 1249 global_tid, serial_team)); 1250 1251 /* TODO the above breaks the requirement that if we run out of resources, 1252 then we can still guarantee that serialized teams are ok, since we may 1253 need to allocate a new one */ 1254 } else { 1255 KF_TRACE( 1256 10, 1257 ("__kmpc_serialized_parallel: T#%d reusing cached serial team %p\n", 1258 global_tid, serial_team)); 1259 } 1260 1261 /* we have to initialize this serial team */ 1262 KMP_DEBUG_ASSERT(serial_team->t.t_threads); 1263 KMP_DEBUG_ASSERT(serial_team->t.t_threads[0] == this_thr); 1264 KMP_DEBUG_ASSERT(this_thr->th.th_team != serial_team); 1265 serial_team->t.t_ident = loc; 1266 serial_team->t.t_serialized = 1; 1267 serial_team->t.t_nproc = 1; 1268 serial_team->t.t_parent = this_thr->th.th_team; 1269 serial_team->t.t_sched.sched = this_thr->th.th_team->t.t_sched.sched; 1270 this_thr->th.th_team = serial_team; 1271 serial_team->t.t_master_tid = this_thr->th.th_info.ds.ds_tid; 1272 1273 KF_TRACE(10, ("__kmpc_serialized_parallel: T#d curtask=%p\n", global_tid, 1274 this_thr->th.th_current_task)); 1275 KMP_ASSERT(this_thr->th.th_current_task->td_flags.executing == 1); 1276 this_thr->th.th_current_task->td_flags.executing = 0; 1277 1278 __kmp_push_current_task_to_thread(this_thr, serial_team, 0); 1279 1280 /* TODO: GEH: do ICVs work for nested serialized teams? Don't we need an 1281 implicit task for each serialized task represented by 1282 team->t.t_serialized? */ 1283 copy_icvs(&this_thr->th.th_current_task->td_icvs, 1284 &this_thr->th.th_current_task->td_parent->td_icvs); 1285 1286 // Thread value exists in the nested nthreads array for the next nested 1287 // level 1288 if (__kmp_nested_nth.used && (level + 1 < __kmp_nested_nth.used)) { 1289 this_thr->th.th_current_task->td_icvs.nproc = 1290 __kmp_nested_nth.nth[level + 1]; 1291 } 1292 1293 if (__kmp_nested_proc_bind.used && 1294 (level + 1 < __kmp_nested_proc_bind.used)) { 1295 this_thr->th.th_current_task->td_icvs.proc_bind = 1296 __kmp_nested_proc_bind.bind_types[level + 1]; 1297 } 1298 1299 #if USE_DEBUGGER 1300 serial_team->t.t_pkfn = (microtask_t)(~0); // For the debugger. 1301 #endif 1302 this_thr->th.th_info.ds.ds_tid = 0; 1303 1304 /* set thread cache values */ 1305 this_thr->th.th_team_nproc = 1; 1306 this_thr->th.th_team_master = this_thr; 1307 this_thr->th.th_team_serialized = 1; 1308 1309 serial_team->t.t_level = serial_team->t.t_parent->t.t_level + 1; 1310 serial_team->t.t_active_level = serial_team->t.t_parent->t.t_active_level; 1311 serial_team->t.t_def_allocator = this_thr->th.th_def_allocator; // save 1312 1313 propagateFPControl(serial_team); 1314 1315 /* check if we need to allocate dispatch buffers stack */ 1316 KMP_DEBUG_ASSERT(serial_team->t.t_dispatch); 1317 if (!serial_team->t.t_dispatch->th_disp_buffer) { 1318 serial_team->t.t_dispatch->th_disp_buffer = 1319 (dispatch_private_info_t *)__kmp_allocate( 1320 sizeof(dispatch_private_info_t)); 1321 } 1322 this_thr->th.th_dispatch = serial_team->t.t_dispatch; 1323 1324 KMP_MB(); 1325 1326 } else { 1327 /* this serialized team is already being used, 1328 * that's fine, just add another nested level */ 1329 KMP_DEBUG_ASSERT(this_thr->th.th_team == serial_team); 1330 KMP_DEBUG_ASSERT(serial_team->t.t_threads); 1331 KMP_DEBUG_ASSERT(serial_team->t.t_threads[0] == this_thr); 1332 ++serial_team->t.t_serialized; 1333 this_thr->th.th_team_serialized = serial_team->t.t_serialized; 1334 1335 // Nested level will be an index in the nested nthreads array 1336 int level = this_thr->th.th_team->t.t_level; 1337 // Thread value exists in the nested nthreads array for the next nested 1338 // level 1339 if (__kmp_nested_nth.used && (level + 1 < __kmp_nested_nth.used)) { 1340 this_thr->th.th_current_task->td_icvs.nproc = 1341 __kmp_nested_nth.nth[level + 1]; 1342 } 1343 serial_team->t.t_level++; 1344 KF_TRACE(10, ("__kmpc_serialized_parallel: T#%d increasing nesting level " 1345 "of serial team %p to %d\n", 1346 global_tid, serial_team, serial_team->t.t_level)); 1347 1348 /* allocate/push dispatch buffers stack */ 1349 KMP_DEBUG_ASSERT(serial_team->t.t_dispatch); 1350 { 1351 dispatch_private_info_t *disp_buffer = 1352 (dispatch_private_info_t *)__kmp_allocate( 1353 sizeof(dispatch_private_info_t)); 1354 disp_buffer->next = serial_team->t.t_dispatch->th_disp_buffer; 1355 serial_team->t.t_dispatch->th_disp_buffer = disp_buffer; 1356 } 1357 this_thr->th.th_dispatch = serial_team->t.t_dispatch; 1358 1359 KMP_MB(); 1360 } 1361 KMP_CHECK_UPDATE(serial_team->t.t_cancel_request, cancel_noreq); 1362 1363 // Perform the display affinity functionality for 1364 // serialized parallel regions 1365 if (__kmp_display_affinity) { 1366 if (this_thr->th.th_prev_level != serial_team->t.t_level || 1367 this_thr->th.th_prev_num_threads != 1) { 1368 // NULL means use the affinity-format-var ICV 1369 __kmp_aux_display_affinity(global_tid, NULL); 1370 this_thr->th.th_prev_level = serial_team->t.t_level; 1371 this_thr->th.th_prev_num_threads = 1; 1372 } 1373 } 1374 1375 if (__kmp_env_consistency_check) 1376 __kmp_push_parallel(global_tid, NULL); 1377 #if OMPT_SUPPORT 1378 serial_team->t.ompt_team_info.master_return_address = codeptr; 1379 if (ompt_enabled.enabled && 1380 this_thr->th.ompt_thread_info.state != ompt_state_overhead) { 1381 OMPT_CUR_TASK_INFO(this_thr)->frame.exit_frame.ptr = OMPT_GET_FRAME_ADDRESS(0); 1382 1383 ompt_lw_taskteam_t lw_taskteam; 1384 __ompt_lw_taskteam_init(&lw_taskteam, this_thr, global_tid, 1385 &ompt_parallel_data, codeptr); 1386 1387 __ompt_lw_taskteam_link(&lw_taskteam, this_thr, 1); 1388 // don't use lw_taskteam after linking. content was swaped 1389 1390 /* OMPT implicit task begin */ 1391 implicit_task_data = OMPT_CUR_TASK_DATA(this_thr); 1392 if (ompt_enabled.ompt_callback_implicit_task) { 1393 ompt_callbacks.ompt_callback(ompt_callback_implicit_task)( 1394 ompt_scope_begin, OMPT_CUR_TEAM_DATA(this_thr), 1395 OMPT_CUR_TASK_DATA(this_thr), 1, __kmp_tid_from_gtid(global_tid), ompt_task_implicit); // TODO: Can this be ompt_task_initial? 1396 OMPT_CUR_TASK_INFO(this_thr) 1397 ->thread_num = __kmp_tid_from_gtid(global_tid); 1398 } 1399 1400 /* OMPT state */ 1401 this_thr->th.ompt_thread_info.state = ompt_state_work_parallel; 1402 OMPT_CUR_TASK_INFO(this_thr)->frame.exit_frame.ptr = OMPT_GET_FRAME_ADDRESS(0); 1403 } 1404 #endif 1405 } 1406 1407 /* most of the work for a fork */ 1408 /* return true if we really went parallel, false if serialized */ 1409 int __kmp_fork_call(ident_t *loc, int gtid, 1410 enum fork_context_e call_context, // Intel, GNU, ... 1411 kmp_int32 argc, microtask_t microtask, launch_t invoker, 1412 kmp_va_list ap) { 1413 void **argv; 1414 int i; 1415 int master_tid; 1416 int master_this_cons; 1417 kmp_team_t *team; 1418 kmp_team_t *parent_team; 1419 kmp_info_t *master_th; 1420 kmp_root_t *root; 1421 int nthreads; 1422 int master_active; 1423 int master_set_numthreads; 1424 int level; 1425 int active_level; 1426 int teams_level; 1427 #if KMP_NESTED_HOT_TEAMS 1428 kmp_hot_team_ptr_t **p_hot_teams; 1429 #endif 1430 { // KMP_TIME_BLOCK 1431 KMP_TIME_DEVELOPER_PARTITIONED_BLOCK(KMP_fork_call); 1432 KMP_COUNT_VALUE(OMP_PARALLEL_args, argc); 1433 1434 KA_TRACE(20, ("__kmp_fork_call: enter T#%d\n", gtid)); 1435 if (__kmp_stkpadding > 0 && __kmp_root[gtid] != NULL) { 1436 /* Some systems prefer the stack for the root thread(s) to start with */ 1437 /* some gap from the parent stack to prevent false sharing. */ 1438 void *dummy = KMP_ALLOCA(__kmp_stkpadding); 1439 /* These 2 lines below are so this does not get optimized out */ 1440 if (__kmp_stkpadding > KMP_MAX_STKPADDING) 1441 __kmp_stkpadding += (short)((kmp_int64)dummy); 1442 } 1443 1444 /* initialize if needed */ 1445 KMP_DEBUG_ASSERT( 1446 __kmp_init_serial); // AC: potentially unsafe, not in sync with shutdown 1447 if (!TCR_4(__kmp_init_parallel)) 1448 __kmp_parallel_initialize(); 1449 __kmp_resume_if_soft_paused(); 1450 1451 /* setup current data */ 1452 master_th = __kmp_threads[gtid]; // AC: potentially unsafe, not in sync with 1453 // shutdown 1454 parent_team = master_th->th.th_team; 1455 master_tid = master_th->th.th_info.ds.ds_tid; 1456 master_this_cons = master_th->th.th_local.this_construct; 1457 root = master_th->th.th_root; 1458 master_active = root->r.r_active; 1459 master_set_numthreads = master_th->th.th_set_nproc; 1460 1461 #if OMPT_SUPPORT 1462 ompt_data_t ompt_parallel_data = ompt_data_none; 1463 ompt_data_t *parent_task_data; 1464 ompt_frame_t *ompt_frame; 1465 ompt_data_t *implicit_task_data; 1466 void *return_address = NULL; 1467 1468 if (ompt_enabled.enabled) { 1469 __ompt_get_task_info_internal(0, NULL, &parent_task_data, &ompt_frame, 1470 NULL, NULL); 1471 return_address = OMPT_LOAD_RETURN_ADDRESS(gtid); 1472 } 1473 #endif 1474 1475 // Nested level will be an index in the nested nthreads array 1476 level = parent_team->t.t_level; 1477 // used to launch non-serial teams even if nested is not allowed 1478 active_level = parent_team->t.t_active_level; 1479 // needed to check nesting inside the teams 1480 teams_level = master_th->th.th_teams_level; 1481 #if KMP_NESTED_HOT_TEAMS 1482 p_hot_teams = &master_th->th.th_hot_teams; 1483 if (*p_hot_teams == NULL && __kmp_hot_teams_max_level > 0) { 1484 *p_hot_teams = (kmp_hot_team_ptr_t *)__kmp_allocate( 1485 sizeof(kmp_hot_team_ptr_t) * __kmp_hot_teams_max_level); 1486 (*p_hot_teams)[0].hot_team = root->r.r_hot_team; 1487 // it is either actual or not needed (when active_level > 0) 1488 (*p_hot_teams)[0].hot_team_nth = 1; 1489 } 1490 #endif 1491 1492 #if OMPT_SUPPORT 1493 if (ompt_enabled.enabled) { 1494 if (ompt_enabled.ompt_callback_parallel_begin) { 1495 int team_size = master_set_numthreads 1496 ? master_set_numthreads 1497 : get__nproc_2(parent_team, master_tid); 1498 int flags = OMPT_INVOKER(call_context) | 1499 ((microtask == (microtask_t)__kmp_teams_master) 1500 ? ompt_parallel_league 1501 : ompt_parallel_team); 1502 ompt_callbacks.ompt_callback(ompt_callback_parallel_begin)( 1503 parent_task_data, ompt_frame, &ompt_parallel_data, team_size, flags, 1504 return_address); 1505 } 1506 master_th->th.ompt_thread_info.state = ompt_state_overhead; 1507 } 1508 #endif 1509 1510 master_th->th.th_ident = loc; 1511 1512 if (master_th->th.th_teams_microtask && ap && 1513 microtask != (microtask_t)__kmp_teams_master && level == teams_level) { 1514 // AC: This is start of parallel that is nested inside teams construct. 1515 // The team is actual (hot), all workers are ready at the fork barrier. 1516 // No lock needed to initialize the team a bit, then free workers. 1517 parent_team->t.t_ident = loc; 1518 __kmp_alloc_argv_entries(argc, parent_team, TRUE); 1519 parent_team->t.t_argc = argc; 1520 argv = (void **)parent_team->t.t_argv; 1521 for (i = argc - 1; i >= 0; --i) 1522 *argv++ = va_arg(kmp_va_deref(ap), void *); 1523 // Increment our nested depth levels, but not increase the serialization 1524 if (parent_team == master_th->th.th_serial_team) { 1525 // AC: we are in serialized parallel 1526 __kmpc_serialized_parallel(loc, gtid); 1527 KMP_DEBUG_ASSERT(parent_team->t.t_serialized > 1); 1528 1529 if (call_context == fork_context_gnu) { 1530 // AC: need to decrement t_serialized for enquiry functions to work 1531 // correctly, will restore at join time 1532 parent_team->t.t_serialized--; 1533 return TRUE; 1534 } 1535 1536 #if OMPT_SUPPORT 1537 void *dummy; 1538 void **exit_frame_p; 1539 1540 ompt_lw_taskteam_t lw_taskteam; 1541 1542 if (ompt_enabled.enabled) { 1543 __ompt_lw_taskteam_init(&lw_taskteam, master_th, gtid, 1544 &ompt_parallel_data, return_address); 1545 exit_frame_p = &(lw_taskteam.ompt_task_info.frame.exit_frame.ptr); 1546 1547 __ompt_lw_taskteam_link(&lw_taskteam, master_th, 0); 1548 // don't use lw_taskteam after linking. content was swaped 1549 1550 /* OMPT implicit task begin */ 1551 implicit_task_data = OMPT_CUR_TASK_DATA(master_th); 1552 if (ompt_enabled.ompt_callback_implicit_task) { 1553 OMPT_CUR_TASK_INFO(master_th) 1554 ->thread_num = __kmp_tid_from_gtid(gtid); 1555 ompt_callbacks.ompt_callback(ompt_callback_implicit_task)( 1556 ompt_scope_begin, OMPT_CUR_TEAM_DATA(master_th), 1557 implicit_task_data, 1, 1558 OMPT_CUR_TASK_INFO(master_th)->thread_num, ompt_task_implicit); 1559 } 1560 1561 /* OMPT state */ 1562 master_th->th.ompt_thread_info.state = ompt_state_work_parallel; 1563 } else { 1564 exit_frame_p = &dummy; 1565 } 1566 #endif 1567 // AC: need to decrement t_serialized for enquiry functions to work 1568 // correctly, will restore at join time 1569 parent_team->t.t_serialized--; 1570 1571 { 1572 KMP_TIME_PARTITIONED_BLOCK(OMP_parallel); 1573 KMP_SET_THREAD_STATE_BLOCK(IMPLICIT_TASK); 1574 __kmp_invoke_microtask(microtask, gtid, 0, argc, parent_team->t.t_argv 1575 #if OMPT_SUPPORT 1576 , 1577 exit_frame_p 1578 #endif 1579 ); 1580 } 1581 1582 #if OMPT_SUPPORT 1583 if (ompt_enabled.enabled) { 1584 *exit_frame_p = NULL; 1585 OMPT_CUR_TASK_INFO(master_th)->frame.exit_frame = ompt_data_none; 1586 if (ompt_enabled.ompt_callback_implicit_task) { 1587 ompt_callbacks.ompt_callback(ompt_callback_implicit_task)( 1588 ompt_scope_end, NULL, implicit_task_data, 1, 1589 OMPT_CUR_TASK_INFO(master_th)->thread_num, ompt_task_implicit); 1590 } 1591 ompt_parallel_data = *OMPT_CUR_TEAM_DATA(master_th); 1592 __ompt_lw_taskteam_unlink(master_th); 1593 if (ompt_enabled.ompt_callback_parallel_end) { 1594 ompt_callbacks.ompt_callback(ompt_callback_parallel_end)( 1595 &ompt_parallel_data, OMPT_CUR_TASK_DATA(master_th), 1596 OMPT_INVOKER(call_context) | ompt_parallel_team, 1597 return_address); 1598 } 1599 master_th->th.ompt_thread_info.state = ompt_state_overhead; 1600 } 1601 #endif 1602 return TRUE; 1603 } 1604 1605 parent_team->t.t_pkfn = microtask; 1606 parent_team->t.t_invoke = invoker; 1607 KMP_ATOMIC_INC(&root->r.r_in_parallel); 1608 parent_team->t.t_active_level++; 1609 parent_team->t.t_level++; 1610 parent_team->t.t_def_allocator = master_th->th.th_def_allocator; // save 1611 1612 #if OMPT_SUPPORT 1613 if (ompt_enabled.enabled) { 1614 ompt_lw_taskteam_t lw_taskteam; 1615 __ompt_lw_taskteam_init(&lw_taskteam, master_th, gtid, 1616 &ompt_parallel_data, return_address); 1617 __ompt_lw_taskteam_link(&lw_taskteam, master_th, 1, true); 1618 } 1619 #endif 1620 1621 /* Change number of threads in the team if requested */ 1622 if (master_set_numthreads) { // The parallel has num_threads clause 1623 if (master_set_numthreads < master_th->th.th_teams_size.nth) { 1624 // AC: only can reduce number of threads dynamically, can't increase 1625 kmp_info_t **other_threads = parent_team->t.t_threads; 1626 parent_team->t.t_nproc = master_set_numthreads; 1627 for (i = 0; i < master_set_numthreads; ++i) { 1628 other_threads[i]->th.th_team_nproc = master_set_numthreads; 1629 } 1630 // Keep extra threads hot in the team for possible next parallels 1631 } 1632 master_th->th.th_set_nproc = 0; 1633 } 1634 1635 #if USE_DEBUGGER 1636 if (__kmp_debugging) { // Let debugger override number of threads. 1637 int nth = __kmp_omp_num_threads(loc); 1638 if (nth > 0) { // 0 means debugger doesn't want to change num threads 1639 master_set_numthreads = nth; 1640 } 1641 } 1642 #endif 1643 1644 #if USE_ITT_BUILD && USE_ITT_NOTIFY 1645 if (((__itt_frame_submit_v3_ptr && __itt_get_timestamp_ptr) || 1646 KMP_ITT_DEBUG) && 1647 __kmp_forkjoin_frames_mode == 3 && 1648 parent_team->t.t_active_level == 1 // only report frames at level 1 1649 && master_th->th.th_teams_size.nteams == 1) { 1650 kmp_uint64 tmp_time = __itt_get_timestamp(); 1651 master_th->th.th_frame_time = tmp_time; 1652 parent_team->t.t_region_time = tmp_time; 1653 } 1654 if (__itt_stack_caller_create_ptr) { 1655 // create new stack stitching id before entering fork barrier 1656 parent_team->t.t_stack_id = __kmp_itt_stack_caller_create(); 1657 } 1658 #endif /* USE_ITT_BUILD && USE_ITT_NOTIFY */ 1659 1660 KF_TRACE(10, ("__kmp_fork_call: before internal fork: root=%p, team=%p, " 1661 "master_th=%p, gtid=%d\n", 1662 root, parent_team, master_th, gtid)); 1663 __kmp_internal_fork(loc, gtid, parent_team); 1664 KF_TRACE(10, ("__kmp_fork_call: after internal fork: root=%p, team=%p, " 1665 "master_th=%p, gtid=%d\n", 1666 root, parent_team, master_th, gtid)); 1667 1668 if (call_context == fork_context_gnu) 1669 return TRUE; 1670 1671 /* Invoke microtask for MASTER thread */ 1672 KA_TRACE(20, ("__kmp_fork_call: T#%d(%d:0) invoke microtask = %p\n", gtid, 1673 parent_team->t.t_id, parent_team->t.t_pkfn)); 1674 1675 if (!parent_team->t.t_invoke(gtid)) { 1676 KMP_ASSERT2(0, "cannot invoke microtask for MASTER thread"); 1677 } 1678 KA_TRACE(20, ("__kmp_fork_call: T#%d(%d:0) done microtask = %p\n", gtid, 1679 parent_team->t.t_id, parent_team->t.t_pkfn)); 1680 KMP_MB(); /* Flush all pending memory write invalidates. */ 1681 1682 KA_TRACE(20, ("__kmp_fork_call: parallel exit T#%d\n", gtid)); 1683 1684 return TRUE; 1685 } // Parallel closely nested in teams construct 1686 1687 #if KMP_DEBUG 1688 if (__kmp_tasking_mode != tskm_immediate_exec) { 1689 KMP_DEBUG_ASSERT(master_th->th.th_task_team == 1690 parent_team->t.t_task_team[master_th->th.th_task_state]); 1691 } 1692 #endif 1693 1694 if (parent_team->t.t_active_level >= 1695 master_th->th.th_current_task->td_icvs.max_active_levels) { 1696 nthreads = 1; 1697 } else { 1698 int enter_teams = ((ap == NULL && active_level == 0) || 1699 (ap && teams_level > 0 && teams_level == level)); 1700 nthreads = 1701 master_set_numthreads 1702 ? master_set_numthreads 1703 : get__nproc_2( 1704 parent_team, 1705 master_tid); // TODO: get nproc directly from current task 1706 1707 // Check if we need to take forkjoin lock? (no need for serialized 1708 // parallel out of teams construct). This code moved here from 1709 // __kmp_reserve_threads() to speedup nested serialized parallels. 1710 if (nthreads > 1) { 1711 if ((get__max_active_levels(master_th) == 1 && 1712 (root->r.r_in_parallel && !enter_teams)) || 1713 (__kmp_library == library_serial)) { 1714 KC_TRACE(10, ("__kmp_fork_call: T#%d serializing team; requested %d" 1715 " threads\n", 1716 gtid, nthreads)); 1717 nthreads = 1; 1718 } 1719 } 1720 if (nthreads > 1) { 1721 /* determine how many new threads we can use */ 1722 __kmp_acquire_bootstrap_lock(&__kmp_forkjoin_lock); 1723 /* AC: If we execute teams from parallel region (on host), then teams 1724 should be created but each can only have 1 thread if nesting is 1725 disabled. If teams called from serial region, then teams and their 1726 threads should be created regardless of the nesting setting. */ 1727 nthreads = __kmp_reserve_threads(root, parent_team, master_tid, 1728 nthreads, enter_teams); 1729 if (nthreads == 1) { 1730 // Free lock for single thread execution here; for multi-thread 1731 // execution it will be freed later after team of threads created 1732 // and initialized 1733 __kmp_release_bootstrap_lock(&__kmp_forkjoin_lock); 1734 } 1735 } 1736 } 1737 KMP_DEBUG_ASSERT(nthreads > 0); 1738 1739 // If we temporarily changed the set number of threads then restore it now 1740 master_th->th.th_set_nproc = 0; 1741 1742 /* create a serialized parallel region? */ 1743 if (nthreads == 1) { 1744 /* josh todo: hypothetical question: what do we do for OS X*? */ 1745 #if KMP_OS_LINUX && \ 1746 (KMP_ARCH_X86 || KMP_ARCH_X86_64 || KMP_ARCH_ARM || KMP_ARCH_AARCH64) 1747 void *args[argc]; 1748 #else 1749 void **args = (void **)KMP_ALLOCA(argc * sizeof(void *)); 1750 #endif /* KMP_OS_LINUX && ( KMP_ARCH_X86 || KMP_ARCH_X86_64 || KMP_ARCH_ARM || \ 1751 KMP_ARCH_AARCH64) */ 1752 1753 KA_TRACE(20, 1754 ("__kmp_fork_call: T#%d serializing parallel region\n", gtid)); 1755 1756 __kmpc_serialized_parallel(loc, gtid); 1757 1758 if (call_context == fork_context_intel) { 1759 /* TODO this sucks, use the compiler itself to pass args! :) */ 1760 master_th->th.th_serial_team->t.t_ident = loc; 1761 if (!ap) { 1762 // revert change made in __kmpc_serialized_parallel() 1763 master_th->th.th_serial_team->t.t_level--; 1764 // Get args from parent team for teams construct 1765 1766 #if OMPT_SUPPORT 1767 void *dummy; 1768 void **exit_frame_p; 1769 ompt_task_info_t *task_info; 1770 1771 ompt_lw_taskteam_t lw_taskteam; 1772 1773 if (ompt_enabled.enabled) { 1774 __ompt_lw_taskteam_init(&lw_taskteam, master_th, gtid, 1775 &ompt_parallel_data, return_address); 1776 1777 __ompt_lw_taskteam_link(&lw_taskteam, master_th, 0); 1778 // don't use lw_taskteam after linking. content was swaped 1779 1780 task_info = OMPT_CUR_TASK_INFO(master_th); 1781 exit_frame_p = &(task_info->frame.exit_frame.ptr); 1782 if (ompt_enabled.ompt_callback_implicit_task) { 1783 OMPT_CUR_TASK_INFO(master_th) 1784 ->thread_num = __kmp_tid_from_gtid(gtid); 1785 ompt_callbacks.ompt_callback(ompt_callback_implicit_task)( 1786 ompt_scope_begin, OMPT_CUR_TEAM_DATA(master_th), 1787 &(task_info->task_data), 1, 1788 OMPT_CUR_TASK_INFO(master_th)->thread_num, 1789 ompt_task_implicit); 1790 } 1791 1792 /* OMPT state */ 1793 master_th->th.ompt_thread_info.state = ompt_state_work_parallel; 1794 } else { 1795 exit_frame_p = &dummy; 1796 } 1797 #endif 1798 1799 { 1800 KMP_TIME_PARTITIONED_BLOCK(OMP_parallel); 1801 KMP_SET_THREAD_STATE_BLOCK(IMPLICIT_TASK); 1802 __kmp_invoke_microtask(microtask, gtid, 0, argc, 1803 parent_team->t.t_argv 1804 #if OMPT_SUPPORT 1805 , 1806 exit_frame_p 1807 #endif 1808 ); 1809 } 1810 1811 #if OMPT_SUPPORT 1812 if (ompt_enabled.enabled) { 1813 *exit_frame_p = NULL; 1814 if (ompt_enabled.ompt_callback_implicit_task) { 1815 ompt_callbacks.ompt_callback(ompt_callback_implicit_task)( 1816 ompt_scope_end, NULL, &(task_info->task_data), 1, 1817 OMPT_CUR_TASK_INFO(master_th)->thread_num, 1818 ompt_task_implicit); 1819 } 1820 ompt_parallel_data = *OMPT_CUR_TEAM_DATA(master_th); 1821 __ompt_lw_taskteam_unlink(master_th); 1822 if (ompt_enabled.ompt_callback_parallel_end) { 1823 ompt_callbacks.ompt_callback(ompt_callback_parallel_end)( 1824 &ompt_parallel_data, parent_task_data, 1825 OMPT_INVOKER(call_context) | ompt_parallel_team, 1826 return_address); 1827 } 1828 master_th->th.ompt_thread_info.state = ompt_state_overhead; 1829 } 1830 #endif 1831 } else if (microtask == (microtask_t)__kmp_teams_master) { 1832 KMP_DEBUG_ASSERT(master_th->th.th_team == 1833 master_th->th.th_serial_team); 1834 team = master_th->th.th_team; 1835 // team->t.t_pkfn = microtask; 1836 team->t.t_invoke = invoker; 1837 __kmp_alloc_argv_entries(argc, team, TRUE); 1838 team->t.t_argc = argc; 1839 argv = (void **)team->t.t_argv; 1840 if (ap) { 1841 for (i = argc - 1; i >= 0; --i) 1842 *argv++ = va_arg(kmp_va_deref(ap), void *); 1843 } else { 1844 for (i = 0; i < argc; ++i) 1845 // Get args from parent team for teams construct 1846 argv[i] = parent_team->t.t_argv[i]; 1847 } 1848 // AC: revert change made in __kmpc_serialized_parallel() 1849 // because initial code in teams should have level=0 1850 team->t.t_level--; 1851 // AC: call special invoker for outer "parallel" of teams construct 1852 invoker(gtid); 1853 #if OMPT_SUPPORT 1854 if (ompt_enabled.enabled) { 1855 ompt_task_info_t *task_info = OMPT_CUR_TASK_INFO(master_th); 1856 if (ompt_enabled.ompt_callback_implicit_task) { 1857 ompt_callbacks.ompt_callback(ompt_callback_implicit_task)( 1858 ompt_scope_end, NULL, &(task_info->task_data), 0, 1859 OMPT_CUR_TASK_INFO(master_th)->thread_num, ompt_task_initial); 1860 } 1861 if (ompt_enabled.ompt_callback_parallel_end) { 1862 ompt_callbacks.ompt_callback(ompt_callback_parallel_end)( 1863 &ompt_parallel_data, parent_task_data, 1864 OMPT_INVOKER(call_context) | ompt_parallel_league, 1865 return_address); 1866 } 1867 master_th->th.ompt_thread_info.state = ompt_state_overhead; 1868 } 1869 #endif 1870 } else { 1871 argv = args; 1872 for (i = argc - 1; i >= 0; --i) 1873 *argv++ = va_arg(kmp_va_deref(ap), void *); 1874 KMP_MB(); 1875 1876 #if OMPT_SUPPORT 1877 void *dummy; 1878 void **exit_frame_p; 1879 ompt_task_info_t *task_info; 1880 1881 ompt_lw_taskteam_t lw_taskteam; 1882 1883 if (ompt_enabled.enabled) { 1884 __ompt_lw_taskteam_init(&lw_taskteam, master_th, gtid, 1885 &ompt_parallel_data, return_address); 1886 __ompt_lw_taskteam_link(&lw_taskteam, master_th, 0); 1887 // don't use lw_taskteam after linking. content was swaped 1888 task_info = OMPT_CUR_TASK_INFO(master_th); 1889 exit_frame_p = &(task_info->frame.exit_frame.ptr); 1890 1891 /* OMPT implicit task begin */ 1892 implicit_task_data = OMPT_CUR_TASK_DATA(master_th); 1893 if (ompt_enabled.ompt_callback_implicit_task) { 1894 ompt_callbacks.ompt_callback(ompt_callback_implicit_task)( 1895 ompt_scope_begin, OMPT_CUR_TEAM_DATA(master_th), 1896 implicit_task_data, 1, __kmp_tid_from_gtid(gtid), 1897 ompt_task_implicit); 1898 OMPT_CUR_TASK_INFO(master_th) 1899 ->thread_num = __kmp_tid_from_gtid(gtid); 1900 } 1901 1902 /* OMPT state */ 1903 master_th->th.ompt_thread_info.state = ompt_state_work_parallel; 1904 } else { 1905 exit_frame_p = &dummy; 1906 } 1907 #endif 1908 1909 { 1910 KMP_TIME_PARTITIONED_BLOCK(OMP_parallel); 1911 KMP_SET_THREAD_STATE_BLOCK(IMPLICIT_TASK); 1912 __kmp_invoke_microtask(microtask, gtid, 0, argc, args 1913 #if OMPT_SUPPORT 1914 , 1915 exit_frame_p 1916 #endif 1917 ); 1918 } 1919 1920 #if OMPT_SUPPORT 1921 if (ompt_enabled.enabled) { 1922 *exit_frame_p = NULL; 1923 if (ompt_enabled.ompt_callback_implicit_task) { 1924 ompt_callbacks.ompt_callback(ompt_callback_implicit_task)( 1925 ompt_scope_end, NULL, &(task_info->task_data), 1, 1926 OMPT_CUR_TASK_INFO(master_th)->thread_num, 1927 ompt_task_implicit); 1928 } 1929 1930 ompt_parallel_data = *OMPT_CUR_TEAM_DATA(master_th); 1931 __ompt_lw_taskteam_unlink(master_th); 1932 if (ompt_enabled.ompt_callback_parallel_end) { 1933 ompt_callbacks.ompt_callback(ompt_callback_parallel_end)( 1934 &ompt_parallel_data, parent_task_data, 1935 OMPT_INVOKER(call_context) | ompt_parallel_team, 1936 return_address); 1937 } 1938 master_th->th.ompt_thread_info.state = ompt_state_overhead; 1939 } 1940 #endif 1941 } 1942 } else if (call_context == fork_context_gnu) { 1943 #if OMPT_SUPPORT 1944 ompt_lw_taskteam_t lwt; 1945 __ompt_lw_taskteam_init(&lwt, master_th, gtid, &ompt_parallel_data, 1946 return_address); 1947 1948 lwt.ompt_task_info.frame.exit_frame = ompt_data_none; 1949 __ompt_lw_taskteam_link(&lwt, master_th, 1); 1950 // don't use lw_taskteam after linking. content was swaped 1951 #endif 1952 1953 // we were called from GNU native code 1954 KA_TRACE(20, ("__kmp_fork_call: T#%d serial exit\n", gtid)); 1955 return FALSE; 1956 } else { 1957 KMP_ASSERT2(call_context < fork_context_last, 1958 "__kmp_fork_call: unknown fork_context parameter"); 1959 } 1960 1961 KA_TRACE(20, ("__kmp_fork_call: T#%d serial exit\n", gtid)); 1962 KMP_MB(); 1963 return FALSE; 1964 } // if (nthreads == 1) 1965 1966 // GEH: only modify the executing flag in the case when not serialized 1967 // serialized case is handled in kmpc_serialized_parallel 1968 KF_TRACE(10, ("__kmp_fork_call: parent_team_aclevel=%d, master_th=%p, " 1969 "curtask=%p, curtask_max_aclevel=%d\n", 1970 parent_team->t.t_active_level, master_th, 1971 master_th->th.th_current_task, 1972 master_th->th.th_current_task->td_icvs.max_active_levels)); 1973 // TODO: GEH - cannot do this assertion because root thread not set up as 1974 // executing 1975 // KMP_ASSERT( master_th->th.th_current_task->td_flags.executing == 1 ); 1976 master_th->th.th_current_task->td_flags.executing = 0; 1977 1978 if (!master_th->th.th_teams_microtask || level > teams_level) { 1979 /* Increment our nested depth level */ 1980 KMP_ATOMIC_INC(&root->r.r_in_parallel); 1981 } 1982 1983 // See if we need to make a copy of the ICVs. 1984 int nthreads_icv = master_th->th.th_current_task->td_icvs.nproc; 1985 if ((level + 1 < __kmp_nested_nth.used) && 1986 (__kmp_nested_nth.nth[level + 1] != nthreads_icv)) { 1987 nthreads_icv = __kmp_nested_nth.nth[level + 1]; 1988 } else { 1989 nthreads_icv = 0; // don't update 1990 } 1991 1992 // Figure out the proc_bind_policy for the new team. 1993 kmp_proc_bind_t proc_bind = master_th->th.th_set_proc_bind; 1994 kmp_proc_bind_t proc_bind_icv = 1995 proc_bind_default; // proc_bind_default means don't update 1996 if (master_th->th.th_current_task->td_icvs.proc_bind == proc_bind_false) { 1997 proc_bind = proc_bind_false; 1998 } else { 1999 if (proc_bind == proc_bind_default) { 2000 // No proc_bind clause specified; use current proc-bind-var for this 2001 // parallel region 2002 proc_bind = master_th->th.th_current_task->td_icvs.proc_bind; 2003 } 2004 /* else: The proc_bind policy was specified explicitly on parallel clause. 2005 This overrides proc-bind-var for this parallel region, but does not 2006 change proc-bind-var. */ 2007 // Figure the value of proc-bind-var for the child threads. 2008 if ((level + 1 < __kmp_nested_proc_bind.used) && 2009 (__kmp_nested_proc_bind.bind_types[level + 1] != 2010 master_th->th.th_current_task->td_icvs.proc_bind)) { 2011 proc_bind_icv = __kmp_nested_proc_bind.bind_types[level + 1]; 2012 } 2013 } 2014 2015 // Reset for next parallel region 2016 master_th->th.th_set_proc_bind = proc_bind_default; 2017 2018 if ((nthreads_icv > 0) || (proc_bind_icv != proc_bind_default)) { 2019 kmp_internal_control_t new_icvs; 2020 copy_icvs(&new_icvs, &master_th->th.th_current_task->td_icvs); 2021 new_icvs.next = NULL; 2022 if (nthreads_icv > 0) { 2023 new_icvs.nproc = nthreads_icv; 2024 } 2025 if (proc_bind_icv != proc_bind_default) { 2026 new_icvs.proc_bind = proc_bind_icv; 2027 } 2028 2029 /* allocate a new parallel team */ 2030 KF_TRACE(10, ("__kmp_fork_call: before __kmp_allocate_team\n")); 2031 team = __kmp_allocate_team(root, nthreads, nthreads, 2032 #if OMPT_SUPPORT 2033 ompt_parallel_data, 2034 #endif 2035 proc_bind, &new_icvs, 2036 argc USE_NESTED_HOT_ARG(master_th)); 2037 } else { 2038 /* allocate a new parallel team */ 2039 KF_TRACE(10, ("__kmp_fork_call: before __kmp_allocate_team\n")); 2040 team = __kmp_allocate_team(root, nthreads, nthreads, 2041 #if OMPT_SUPPORT 2042 ompt_parallel_data, 2043 #endif 2044 proc_bind, 2045 &master_th->th.th_current_task->td_icvs, 2046 argc USE_NESTED_HOT_ARG(master_th)); 2047 } 2048 KF_TRACE( 2049 10, ("__kmp_fork_call: after __kmp_allocate_team - team = %p\n", team)); 2050 2051 /* setup the new team */ 2052 KMP_CHECK_UPDATE(team->t.t_master_tid, master_tid); 2053 KMP_CHECK_UPDATE(team->t.t_master_this_cons, master_this_cons); 2054 KMP_CHECK_UPDATE(team->t.t_ident, loc); 2055 KMP_CHECK_UPDATE(team->t.t_parent, parent_team); 2056 KMP_CHECK_UPDATE_SYNC(team->t.t_pkfn, microtask); 2057 #if OMPT_SUPPORT 2058 KMP_CHECK_UPDATE_SYNC(team->t.ompt_team_info.master_return_address, 2059 return_address); 2060 #endif 2061 KMP_CHECK_UPDATE(team->t.t_invoke, invoker); // TODO move to root, maybe 2062 // TODO: parent_team->t.t_level == INT_MAX ??? 2063 if (!master_th->th.th_teams_microtask || level > teams_level) { 2064 int new_level = parent_team->t.t_level + 1; 2065 KMP_CHECK_UPDATE(team->t.t_level, new_level); 2066 new_level = parent_team->t.t_active_level + 1; 2067 KMP_CHECK_UPDATE(team->t.t_active_level, new_level); 2068 } else { 2069 // AC: Do not increase parallel level at start of the teams construct 2070 int new_level = parent_team->t.t_level; 2071 KMP_CHECK_UPDATE(team->t.t_level, new_level); 2072 new_level = parent_team->t.t_active_level; 2073 KMP_CHECK_UPDATE(team->t.t_active_level, new_level); 2074 } 2075 kmp_r_sched_t new_sched = get__sched_2(parent_team, master_tid); 2076 // set master's schedule as new run-time schedule 2077 KMP_CHECK_UPDATE(team->t.t_sched.sched, new_sched.sched); 2078 2079 KMP_CHECK_UPDATE(team->t.t_cancel_request, cancel_noreq); 2080 KMP_CHECK_UPDATE(team->t.t_def_allocator, master_th->th.th_def_allocator); 2081 2082 // Update the floating point rounding in the team if required. 2083 propagateFPControl(team); 2084 2085 if (__kmp_tasking_mode != tskm_immediate_exec) { 2086 // Set master's task team to team's task team. Unless this is hot team, it 2087 // should be NULL. 2088 KMP_DEBUG_ASSERT(master_th->th.th_task_team == 2089 parent_team->t.t_task_team[master_th->th.th_task_state]); 2090 KA_TRACE(20, ("__kmp_fork_call: Master T#%d pushing task_team %p / team " 2091 "%p, new task_team %p / team %p\n", 2092 __kmp_gtid_from_thread(master_th), 2093 master_th->th.th_task_team, parent_team, 2094 team->t.t_task_team[master_th->th.th_task_state], team)); 2095 2096 if (active_level || master_th->th.th_task_team) { 2097 // Take a memo of master's task_state 2098 KMP_DEBUG_ASSERT(master_th->th.th_task_state_memo_stack); 2099 if (master_th->th.th_task_state_top >= 2100 master_th->th.th_task_state_stack_sz) { // increase size 2101 kmp_uint32 new_size = 2 * master_th->th.th_task_state_stack_sz; 2102 kmp_uint8 *old_stack, *new_stack; 2103 kmp_uint32 i; 2104 new_stack = (kmp_uint8 *)__kmp_allocate(new_size); 2105 for (i = 0; i < master_th->th.th_task_state_stack_sz; ++i) { 2106 new_stack[i] = master_th->th.th_task_state_memo_stack[i]; 2107 } 2108 for (i = master_th->th.th_task_state_stack_sz; i < new_size; 2109 ++i) { // zero-init rest of stack 2110 new_stack[i] = 0; 2111 } 2112 old_stack = master_th->th.th_task_state_memo_stack; 2113 master_th->th.th_task_state_memo_stack = new_stack; 2114 master_th->th.th_task_state_stack_sz = new_size; 2115 __kmp_free(old_stack); 2116 } 2117 // Store master's task_state on stack 2118 master_th->th 2119 .th_task_state_memo_stack[master_th->th.th_task_state_top] = 2120 master_th->th.th_task_state; 2121 master_th->th.th_task_state_top++; 2122 #if KMP_NESTED_HOT_TEAMS 2123 if (master_th->th.th_hot_teams && 2124 active_level < __kmp_hot_teams_max_level && 2125 team == master_th->th.th_hot_teams[active_level].hot_team) { 2126 // Restore master's nested state if nested hot team 2127 master_th->th.th_task_state = 2128 master_th->th 2129 .th_task_state_memo_stack[master_th->th.th_task_state_top]; 2130 } else { 2131 #endif 2132 master_th->th.th_task_state = 0; 2133 #if KMP_NESTED_HOT_TEAMS 2134 } 2135 #endif 2136 } 2137 #if !KMP_NESTED_HOT_TEAMS 2138 KMP_DEBUG_ASSERT((master_th->th.th_task_team == NULL) || 2139 (team == root->r.r_hot_team)); 2140 #endif 2141 } 2142 2143 KA_TRACE( 2144 20, 2145 ("__kmp_fork_call: T#%d(%d:%d)->(%d:0) created a team of %d threads\n", 2146 gtid, parent_team->t.t_id, team->t.t_master_tid, team->t.t_id, 2147 team->t.t_nproc)); 2148 KMP_DEBUG_ASSERT(team != root->r.r_hot_team || 2149 (team->t.t_master_tid == 0 && 2150 (team->t.t_parent == root->r.r_root_team || 2151 team->t.t_parent->t.t_serialized))); 2152 KMP_MB(); 2153 2154 /* now, setup the arguments */ 2155 argv = (void **)team->t.t_argv; 2156 if (ap) { 2157 for (i = argc - 1; i >= 0; --i) { 2158 void *new_argv = va_arg(kmp_va_deref(ap), void *); 2159 KMP_CHECK_UPDATE(*argv, new_argv); 2160 argv++; 2161 } 2162 } else { 2163 for (i = 0; i < argc; ++i) { 2164 // Get args from parent team for teams construct 2165 KMP_CHECK_UPDATE(argv[i], team->t.t_parent->t.t_argv[i]); 2166 } 2167 } 2168 2169 /* now actually fork the threads */ 2170 KMP_CHECK_UPDATE(team->t.t_master_active, master_active); 2171 if (!root->r.r_active) // Only do assignment if it prevents cache ping-pong 2172 root->r.r_active = TRUE; 2173 2174 __kmp_fork_team_threads(root, team, master_th, gtid); 2175 __kmp_setup_icv_copy(team, nthreads, 2176 &master_th->th.th_current_task->td_icvs, loc); 2177 2178 #if OMPT_SUPPORT 2179 master_th->th.ompt_thread_info.state = ompt_state_work_parallel; 2180 #endif 2181 2182 __kmp_release_bootstrap_lock(&__kmp_forkjoin_lock); 2183 2184 #if USE_ITT_BUILD 2185 if (team->t.t_active_level == 1 // only report frames at level 1 2186 && !master_th->th.th_teams_microtask) { // not in teams construct 2187 #if USE_ITT_NOTIFY 2188 if ((__itt_frame_submit_v3_ptr || KMP_ITT_DEBUG) && 2189 (__kmp_forkjoin_frames_mode == 3 || 2190 __kmp_forkjoin_frames_mode == 1)) { 2191 kmp_uint64 tmp_time = 0; 2192 if (__itt_get_timestamp_ptr) 2193 tmp_time = __itt_get_timestamp(); 2194 // Internal fork - report frame begin 2195 master_th->th.th_frame_time = tmp_time; 2196 if (__kmp_forkjoin_frames_mode == 3) 2197 team->t.t_region_time = tmp_time; 2198 } else 2199 // only one notification scheme (either "submit" or "forking/joined", not both) 2200 #endif /* USE_ITT_NOTIFY */ 2201 if ((__itt_frame_begin_v3_ptr || KMP_ITT_DEBUG) && 2202 __kmp_forkjoin_frames && !__kmp_forkjoin_frames_mode) { 2203 // Mark start of "parallel" region for Intel(R) VTune(TM) analyzer. 2204 __kmp_itt_region_forking(gtid, team->t.t_nproc, 0); 2205 } 2206 } 2207 #endif /* USE_ITT_BUILD */ 2208 2209 /* now go on and do the work */ 2210 KMP_DEBUG_ASSERT(team == __kmp_threads[gtid]->th.th_team); 2211 KMP_MB(); 2212 KF_TRACE(10, 2213 ("__kmp_internal_fork : root=%p, team=%p, master_th=%p, gtid=%d\n", 2214 root, team, master_th, gtid)); 2215 2216 #if USE_ITT_BUILD 2217 if (__itt_stack_caller_create_ptr) { 2218 team->t.t_stack_id = 2219 __kmp_itt_stack_caller_create(); // create new stack stitching id 2220 // before entering fork barrier 2221 } 2222 #endif /* USE_ITT_BUILD */ 2223 2224 // AC: skip __kmp_internal_fork at teams construct, let only master 2225 // threads execute 2226 if (ap) { 2227 __kmp_internal_fork(loc, gtid, team); 2228 KF_TRACE(10, ("__kmp_internal_fork : after : root=%p, team=%p, " 2229 "master_th=%p, gtid=%d\n", 2230 root, team, master_th, gtid)); 2231 } 2232 2233 if (call_context == fork_context_gnu) { 2234 KA_TRACE(20, ("__kmp_fork_call: parallel exit T#%d\n", gtid)); 2235 return TRUE; 2236 } 2237 2238 /* Invoke microtask for MASTER thread */ 2239 KA_TRACE(20, ("__kmp_fork_call: T#%d(%d:0) invoke microtask = %p\n", gtid, 2240 team->t.t_id, team->t.t_pkfn)); 2241 } // END of timer KMP_fork_call block 2242 2243 #if KMP_STATS_ENABLED 2244 // If beginning a teams construct, then change thread state 2245 stats_state_e previous_state = KMP_GET_THREAD_STATE(); 2246 if (!ap) { 2247 KMP_SET_THREAD_STATE(stats_state_e::TEAMS_REGION); 2248 } 2249 #endif 2250 2251 if (!team->t.t_invoke(gtid)) { 2252 KMP_ASSERT2(0, "cannot invoke microtask for MASTER thread"); 2253 } 2254 2255 #if KMP_STATS_ENABLED 2256 // If was beginning of a teams construct, then reset thread state 2257 if (!ap) { 2258 KMP_SET_THREAD_STATE(previous_state); 2259 } 2260 #endif 2261 2262 KA_TRACE(20, ("__kmp_fork_call: T#%d(%d:0) done microtask = %p\n", gtid, 2263 team->t.t_id, team->t.t_pkfn)); 2264 KMP_MB(); /* Flush all pending memory write invalidates. */ 2265 2266 KA_TRACE(20, ("__kmp_fork_call: parallel exit T#%d\n", gtid)); 2267 2268 #if OMPT_SUPPORT 2269 if (ompt_enabled.enabled) { 2270 master_th->th.ompt_thread_info.state = ompt_state_overhead; 2271 } 2272 #endif 2273 2274 return TRUE; 2275 } 2276 2277 #if OMPT_SUPPORT 2278 static inline void __kmp_join_restore_state(kmp_info_t *thread, 2279 kmp_team_t *team) { 2280 // restore state outside the region 2281 thread->th.ompt_thread_info.state = 2282 ((team->t.t_serialized) ? ompt_state_work_serial 2283 : ompt_state_work_parallel); 2284 } 2285 2286 static inline void __kmp_join_ompt(int gtid, kmp_info_t *thread, 2287 kmp_team_t *team, ompt_data_t *parallel_data, 2288 int flags, void *codeptr) { 2289 ompt_task_info_t *task_info = __ompt_get_task_info_object(0); 2290 if (ompt_enabled.ompt_callback_parallel_end) { 2291 ompt_callbacks.ompt_callback(ompt_callback_parallel_end)( 2292 parallel_data, &(task_info->task_data), flags, codeptr); 2293 } 2294 2295 task_info->frame.enter_frame = ompt_data_none; 2296 __kmp_join_restore_state(thread, team); 2297 } 2298 #endif 2299 2300 void __kmp_join_call(ident_t *loc, int gtid 2301 #if OMPT_SUPPORT 2302 , 2303 enum fork_context_e fork_context 2304 #endif 2305 , 2306 int exit_teams) { 2307 KMP_TIME_DEVELOPER_PARTITIONED_BLOCK(KMP_join_call); 2308 kmp_team_t *team; 2309 kmp_team_t *parent_team; 2310 kmp_info_t *master_th; 2311 kmp_root_t *root; 2312 int master_active; 2313 2314 KA_TRACE(20, ("__kmp_join_call: enter T#%d\n", gtid)); 2315 2316 /* setup current data */ 2317 master_th = __kmp_threads[gtid]; 2318 root = master_th->th.th_root; 2319 team = master_th->th.th_team; 2320 parent_team = team->t.t_parent; 2321 2322 master_th->th.th_ident = loc; 2323 2324 #if OMPT_SUPPORT 2325 void *team_microtask = (void *)team->t.t_pkfn; 2326 // For GOMP interface with serialized parallel, need the 2327 // __kmpc_end_serialized_parallel to call hooks for OMPT end-implicit-task 2328 // and end-parallel events. 2329 if (ompt_enabled.enabled && 2330 !(team->t.t_serialized && fork_context == fork_context_gnu)) { 2331 master_th->th.ompt_thread_info.state = ompt_state_overhead; 2332 } 2333 #endif 2334 2335 #if KMP_DEBUG 2336 if (__kmp_tasking_mode != tskm_immediate_exec && !exit_teams) { 2337 KA_TRACE(20, ("__kmp_join_call: T#%d, old team = %p old task_team = %p, " 2338 "th_task_team = %p\n", 2339 __kmp_gtid_from_thread(master_th), team, 2340 team->t.t_task_team[master_th->th.th_task_state], 2341 master_th->th.th_task_team)); 2342 KMP_DEBUG_ASSERT(master_th->th.th_task_team == 2343 team->t.t_task_team[master_th->th.th_task_state]); 2344 } 2345 #endif 2346 2347 if (team->t.t_serialized) { 2348 if (master_th->th.th_teams_microtask) { 2349 // We are in teams construct 2350 int level = team->t.t_level; 2351 int tlevel = master_th->th.th_teams_level; 2352 if (level == tlevel) { 2353 // AC: we haven't incremented it earlier at start of teams construct, 2354 // so do it here - at the end of teams construct 2355 team->t.t_level++; 2356 } else if (level == tlevel + 1) { 2357 // AC: we are exiting parallel inside teams, need to increment 2358 // serialization in order to restore it in the next call to 2359 // __kmpc_end_serialized_parallel 2360 team->t.t_serialized++; 2361 } 2362 } 2363 __kmpc_end_serialized_parallel(loc, gtid); 2364 2365 #if OMPT_SUPPORT 2366 if (ompt_enabled.enabled) { 2367 __kmp_join_restore_state(master_th, parent_team); 2368 } 2369 #endif 2370 2371 return; 2372 } 2373 2374 master_active = team->t.t_master_active; 2375 2376 if (!exit_teams) { 2377 // AC: No barrier for internal teams at exit from teams construct. 2378 // But there is barrier for external team (league). 2379 __kmp_internal_join(loc, gtid, team); 2380 } else { 2381 master_th->th.th_task_state = 2382 0; // AC: no tasking in teams (out of any parallel) 2383 } 2384 2385 KMP_MB(); 2386 2387 #if OMPT_SUPPORT 2388 ompt_data_t *parallel_data = &(team->t.ompt_team_info.parallel_data); 2389 void *codeptr = team->t.ompt_team_info.master_return_address; 2390 #endif 2391 2392 #if USE_ITT_BUILD 2393 if (__itt_stack_caller_create_ptr) { 2394 // destroy the stack stitching id after join barrier 2395 __kmp_itt_stack_caller_destroy((__itt_caller)team->t.t_stack_id); 2396 } 2397 // Mark end of "parallel" region for Intel(R) VTune(TM) analyzer. 2398 if (team->t.t_active_level == 1 && 2399 (!master_th->th.th_teams_microtask || /* not in teams construct */ 2400 master_th->th.th_teams_size.nteams == 1)) { 2401 master_th->th.th_ident = loc; 2402 // only one notification scheme (either "submit" or "forking/joined", not 2403 // both) 2404 if ((__itt_frame_submit_v3_ptr || KMP_ITT_DEBUG) && 2405 __kmp_forkjoin_frames_mode == 3) 2406 __kmp_itt_frame_submit(gtid, team->t.t_region_time, 2407 master_th->th.th_frame_time, 0, loc, 2408 master_th->th.th_team_nproc, 1); 2409 else if ((__itt_frame_end_v3_ptr || KMP_ITT_DEBUG) && 2410 !__kmp_forkjoin_frames_mode && __kmp_forkjoin_frames) 2411 __kmp_itt_region_joined(gtid); 2412 } // active_level == 1 2413 #endif /* USE_ITT_BUILD */ 2414 2415 if (master_th->th.th_teams_microtask && !exit_teams && 2416 team->t.t_pkfn != (microtask_t)__kmp_teams_master && 2417 team->t.t_level == master_th->th.th_teams_level + 1) { 2418 // AC: We need to leave the team structure intact at the end of parallel 2419 // inside the teams construct, so that at the next parallel same (hot) team 2420 // works, only adjust nesting levels 2421 #if OMPT_SUPPORT 2422 ompt_data_t ompt_parallel_data = ompt_data_none; 2423 if (ompt_enabled.enabled) { 2424 ompt_task_info_t *task_info = __ompt_get_task_info_object(0); 2425 if (ompt_enabled.ompt_callback_implicit_task) { 2426 int ompt_team_size = team->t.t_nproc; 2427 ompt_callbacks.ompt_callback(ompt_callback_implicit_task)( 2428 ompt_scope_end, NULL, &(task_info->task_data), ompt_team_size, 2429 OMPT_CUR_TASK_INFO(master_th)->thread_num, ompt_task_implicit); 2430 } 2431 task_info->frame.exit_frame = ompt_data_none; 2432 task_info->task_data = ompt_data_none; 2433 ompt_parallel_data = *OMPT_CUR_TEAM_DATA(master_th); 2434 __ompt_lw_taskteam_unlink(master_th); 2435 } 2436 #endif 2437 /* Decrement our nested depth level */ 2438 team->t.t_level--; 2439 team->t.t_active_level--; 2440 KMP_ATOMIC_DEC(&root->r.r_in_parallel); 2441 2442 // Restore number of threads in the team if needed. This code relies on 2443 // the proper adjustment of th_teams_size.nth after the fork in 2444 // __kmp_teams_master on each teams master in the case that 2445 // __kmp_reserve_threads reduced it. 2446 if (master_th->th.th_team_nproc < master_th->th.th_teams_size.nth) { 2447 int old_num = master_th->th.th_team_nproc; 2448 int new_num = master_th->th.th_teams_size.nth; 2449 kmp_info_t **other_threads = team->t.t_threads; 2450 team->t.t_nproc = new_num; 2451 for (int i = 0; i < old_num; ++i) { 2452 other_threads[i]->th.th_team_nproc = new_num; 2453 } 2454 // Adjust states of non-used threads of the team 2455 for (int i = old_num; i < new_num; ++i) { 2456 // Re-initialize thread's barrier data. 2457 KMP_DEBUG_ASSERT(other_threads[i]); 2458 kmp_balign_t *balign = other_threads[i]->th.th_bar; 2459 for (int b = 0; b < bs_last_barrier; ++b) { 2460 balign[b].bb.b_arrived = team->t.t_bar[b].b_arrived; 2461 KMP_DEBUG_ASSERT(balign[b].bb.wait_flag != KMP_BARRIER_PARENT_FLAG); 2462 #if USE_DEBUGGER 2463 balign[b].bb.b_worker_arrived = team->t.t_bar[b].b_team_arrived; 2464 #endif 2465 } 2466 if (__kmp_tasking_mode != tskm_immediate_exec) { 2467 // Synchronize thread's task state 2468 other_threads[i]->th.th_task_state = master_th->th.th_task_state; 2469 } 2470 } 2471 } 2472 2473 #if OMPT_SUPPORT 2474 if (ompt_enabled.enabled) { 2475 __kmp_join_ompt(gtid, master_th, parent_team, &ompt_parallel_data, 2476 OMPT_INVOKER(fork_context) | ompt_parallel_team, codeptr); 2477 } 2478 #endif 2479 2480 return; 2481 } 2482 2483 /* do cleanup and restore the parent team */ 2484 master_th->th.th_info.ds.ds_tid = team->t.t_master_tid; 2485 master_th->th.th_local.this_construct = team->t.t_master_this_cons; 2486 2487 master_th->th.th_dispatch = &parent_team->t.t_dispatch[team->t.t_master_tid]; 2488 2489 /* jc: The following lock has instructions with REL and ACQ semantics, 2490 separating the parallel user code called in this parallel region 2491 from the serial user code called after this function returns. */ 2492 __kmp_acquire_bootstrap_lock(&__kmp_forkjoin_lock); 2493 2494 if (!master_th->th.th_teams_microtask || 2495 team->t.t_level > master_th->th.th_teams_level) { 2496 /* Decrement our nested depth level */ 2497 KMP_ATOMIC_DEC(&root->r.r_in_parallel); 2498 } 2499 KMP_DEBUG_ASSERT(root->r.r_in_parallel >= 0); 2500 2501 #if OMPT_SUPPORT 2502 if (ompt_enabled.enabled) { 2503 ompt_task_info_t *task_info = __ompt_get_task_info_object(0); 2504 if (ompt_enabled.ompt_callback_implicit_task) { 2505 int flags = (team_microtask == (void *)__kmp_teams_master) 2506 ? ompt_task_initial 2507 : ompt_task_implicit; 2508 int ompt_team_size = (flags == ompt_task_initial) ? 0 : team->t.t_nproc; 2509 ompt_callbacks.ompt_callback(ompt_callback_implicit_task)( 2510 ompt_scope_end, NULL, &(task_info->task_data), ompt_team_size, 2511 OMPT_CUR_TASK_INFO(master_th)->thread_num, flags); 2512 } 2513 task_info->frame.exit_frame = ompt_data_none; 2514 task_info->task_data = ompt_data_none; 2515 } 2516 #endif 2517 2518 KF_TRACE(10, ("__kmp_join_call1: T#%d, this_thread=%p team=%p\n", 0, 2519 master_th, team)); 2520 __kmp_pop_current_task_from_thread(master_th); 2521 2522 #if KMP_AFFINITY_SUPPORTED 2523 // Restore master thread's partition. 2524 master_th->th.th_first_place = team->t.t_first_place; 2525 master_th->th.th_last_place = team->t.t_last_place; 2526 #endif // KMP_AFFINITY_SUPPORTED 2527 master_th->th.th_def_allocator = team->t.t_def_allocator; 2528 2529 updateHWFPControl(team); 2530 2531 if (root->r.r_active != master_active) 2532 root->r.r_active = master_active; 2533 2534 __kmp_free_team(root, team USE_NESTED_HOT_ARG( 2535 master_th)); // this will free worker threads 2536 2537 /* this race was fun to find. make sure the following is in the critical 2538 region otherwise assertions may fail occasionally since the old team may be 2539 reallocated and the hierarchy appears inconsistent. it is actually safe to 2540 run and won't cause any bugs, but will cause those assertion failures. it's 2541 only one deref&assign so might as well put this in the critical region */ 2542 master_th->th.th_team = parent_team; 2543 master_th->th.th_team_nproc = parent_team->t.t_nproc; 2544 master_th->th.th_team_master = parent_team->t.t_threads[0]; 2545 master_th->th.th_team_serialized = parent_team->t.t_serialized; 2546 2547 /* restore serialized team, if need be */ 2548 if (parent_team->t.t_serialized && 2549 parent_team != master_th->th.th_serial_team && 2550 parent_team != root->r.r_root_team) { 2551 __kmp_free_team(root, 2552 master_th->th.th_serial_team USE_NESTED_HOT_ARG(NULL)); 2553 master_th->th.th_serial_team = parent_team; 2554 } 2555 2556 if (__kmp_tasking_mode != tskm_immediate_exec) { 2557 if (master_th->th.th_task_state_top > 2558 0) { // Restore task state from memo stack 2559 KMP_DEBUG_ASSERT(master_th->th.th_task_state_memo_stack); 2560 // Remember master's state if we re-use this nested hot team 2561 master_th->th.th_task_state_memo_stack[master_th->th.th_task_state_top] = 2562 master_th->th.th_task_state; 2563 --master_th->th.th_task_state_top; // pop 2564 // Now restore state at this level 2565 master_th->th.th_task_state = 2566 master_th->th 2567 .th_task_state_memo_stack[master_th->th.th_task_state_top]; 2568 } 2569 // Copy the task team from the parent team to the master thread 2570 master_th->th.th_task_team = 2571 parent_team->t.t_task_team[master_th->th.th_task_state]; 2572 KA_TRACE(20, 2573 ("__kmp_join_call: Master T#%d restoring task_team %p / team %p\n", 2574 __kmp_gtid_from_thread(master_th), master_th->th.th_task_team, 2575 parent_team)); 2576 } 2577 2578 // TODO: GEH - cannot do this assertion because root thread not set up as 2579 // executing 2580 // KMP_ASSERT( master_th->th.th_current_task->td_flags.executing == 0 ); 2581 master_th->th.th_current_task->td_flags.executing = 1; 2582 2583 __kmp_release_bootstrap_lock(&__kmp_forkjoin_lock); 2584 2585 #if OMPT_SUPPORT 2586 int flags = 2587 OMPT_INVOKER(fork_context) | 2588 ((team_microtask == (void *)__kmp_teams_master) ? ompt_parallel_league 2589 : ompt_parallel_team); 2590 if (ompt_enabled.enabled) { 2591 __kmp_join_ompt(gtid, master_th, parent_team, parallel_data, flags, 2592 codeptr); 2593 } 2594 #endif 2595 2596 KMP_MB(); 2597 KA_TRACE(20, ("__kmp_join_call: exit T#%d\n", gtid)); 2598 } 2599 2600 /* Check whether we should push an internal control record onto the 2601 serial team stack. If so, do it. */ 2602 void __kmp_save_internal_controls(kmp_info_t *thread) { 2603 2604 if (thread->th.th_team != thread->th.th_serial_team) { 2605 return; 2606 } 2607 if (thread->th.th_team->t.t_serialized > 1) { 2608 int push = 0; 2609 2610 if (thread->th.th_team->t.t_control_stack_top == NULL) { 2611 push = 1; 2612 } else { 2613 if (thread->th.th_team->t.t_control_stack_top->serial_nesting_level != 2614 thread->th.th_team->t.t_serialized) { 2615 push = 1; 2616 } 2617 } 2618 if (push) { /* push a record on the serial team's stack */ 2619 kmp_internal_control_t *control = 2620 (kmp_internal_control_t *)__kmp_allocate( 2621 sizeof(kmp_internal_control_t)); 2622 2623 copy_icvs(control, &thread->th.th_current_task->td_icvs); 2624 2625 control->serial_nesting_level = thread->th.th_team->t.t_serialized; 2626 2627 control->next = thread->th.th_team->t.t_control_stack_top; 2628 thread->th.th_team->t.t_control_stack_top = control; 2629 } 2630 } 2631 } 2632 2633 /* Changes set_nproc */ 2634 void __kmp_set_num_threads(int new_nth, int gtid) { 2635 kmp_info_t *thread; 2636 kmp_root_t *root; 2637 2638 KF_TRACE(10, ("__kmp_set_num_threads: new __kmp_nth = %d\n", new_nth)); 2639 KMP_DEBUG_ASSERT(__kmp_init_serial); 2640 2641 if (new_nth < 1) 2642 new_nth = 1; 2643 else if (new_nth > __kmp_max_nth) 2644 new_nth = __kmp_max_nth; 2645 2646 KMP_COUNT_VALUE(OMP_set_numthreads, new_nth); 2647 thread = __kmp_threads[gtid]; 2648 if (thread->th.th_current_task->td_icvs.nproc == new_nth) 2649 return; // nothing to do 2650 2651 __kmp_save_internal_controls(thread); 2652 2653 set__nproc(thread, new_nth); 2654 2655 // If this omp_set_num_threads() call will cause the hot team size to be 2656 // reduced (in the absence of a num_threads clause), then reduce it now, 2657 // rather than waiting for the next parallel region. 2658 root = thread->th.th_root; 2659 if (__kmp_init_parallel && (!root->r.r_active) && 2660 (root->r.r_hot_team->t.t_nproc > new_nth) 2661 #if KMP_NESTED_HOT_TEAMS 2662 && __kmp_hot_teams_max_level && !__kmp_hot_teams_mode 2663 #endif 2664 ) { 2665 kmp_team_t *hot_team = root->r.r_hot_team; 2666 int f; 2667 2668 __kmp_acquire_bootstrap_lock(&__kmp_forkjoin_lock); 2669 2670 // Release the extra threads we don't need any more. 2671 for (f = new_nth; f < hot_team->t.t_nproc; f++) { 2672 KMP_DEBUG_ASSERT(hot_team->t.t_threads[f] != NULL); 2673 if (__kmp_tasking_mode != tskm_immediate_exec) { 2674 // When decreasing team size, threads no longer in the team should unref 2675 // task team. 2676 hot_team->t.t_threads[f]->th.th_task_team = NULL; 2677 } 2678 __kmp_free_thread(hot_team->t.t_threads[f]); 2679 hot_team->t.t_threads[f] = NULL; 2680 } 2681 hot_team->t.t_nproc = new_nth; 2682 #if KMP_NESTED_HOT_TEAMS 2683 if (thread->th.th_hot_teams) { 2684 KMP_DEBUG_ASSERT(hot_team == thread->th.th_hot_teams[0].hot_team); 2685 thread->th.th_hot_teams[0].hot_team_nth = new_nth; 2686 } 2687 #endif 2688 2689 __kmp_release_bootstrap_lock(&__kmp_forkjoin_lock); 2690 2691 // Update the t_nproc field in the threads that are still active. 2692 for (f = 0; f < new_nth; f++) { 2693 KMP_DEBUG_ASSERT(hot_team->t.t_threads[f] != NULL); 2694 hot_team->t.t_threads[f]->th.th_team_nproc = new_nth; 2695 } 2696 // Special flag in case omp_set_num_threads() call 2697 hot_team->t.t_size_changed = -1; 2698 } 2699 } 2700 2701 /* Changes max_active_levels */ 2702 void __kmp_set_max_active_levels(int gtid, int max_active_levels) { 2703 kmp_info_t *thread; 2704 2705 KF_TRACE(10, ("__kmp_set_max_active_levels: new max_active_levels for thread " 2706 "%d = (%d)\n", 2707 gtid, max_active_levels)); 2708 KMP_DEBUG_ASSERT(__kmp_init_serial); 2709 2710 // validate max_active_levels 2711 if (max_active_levels < 0) { 2712 KMP_WARNING(ActiveLevelsNegative, max_active_levels); 2713 // We ignore this call if the user has specified a negative value. 2714 // The current setting won't be changed. The last valid setting will be 2715 // used. A warning will be issued (if warnings are allowed as controlled by 2716 // the KMP_WARNINGS env var). 2717 KF_TRACE(10, ("__kmp_set_max_active_levels: the call is ignored: new " 2718 "max_active_levels for thread %d = (%d)\n", 2719 gtid, max_active_levels)); 2720 return; 2721 } 2722 if (max_active_levels <= KMP_MAX_ACTIVE_LEVELS_LIMIT) { 2723 // it's OK, the max_active_levels is within the valid range: [ 0; 2724 // KMP_MAX_ACTIVE_LEVELS_LIMIT ] 2725 // We allow a zero value. (implementation defined behavior) 2726 } else { 2727 KMP_WARNING(ActiveLevelsExceedLimit, max_active_levels, 2728 KMP_MAX_ACTIVE_LEVELS_LIMIT); 2729 max_active_levels = KMP_MAX_ACTIVE_LEVELS_LIMIT; 2730 // Current upper limit is MAX_INT. (implementation defined behavior) 2731 // If the input exceeds the upper limit, we correct the input to be the 2732 // upper limit. (implementation defined behavior) 2733 // Actually, the flow should never get here until we use MAX_INT limit. 2734 } 2735 KF_TRACE(10, ("__kmp_set_max_active_levels: after validation: new " 2736 "max_active_levels for thread %d = (%d)\n", 2737 gtid, max_active_levels)); 2738 2739 thread = __kmp_threads[gtid]; 2740 2741 __kmp_save_internal_controls(thread); 2742 2743 set__max_active_levels(thread, max_active_levels); 2744 } 2745 2746 /* Gets max_active_levels */ 2747 int __kmp_get_max_active_levels(int gtid) { 2748 kmp_info_t *thread; 2749 2750 KF_TRACE(10, ("__kmp_get_max_active_levels: thread %d\n", gtid)); 2751 KMP_DEBUG_ASSERT(__kmp_init_serial); 2752 2753 thread = __kmp_threads[gtid]; 2754 KMP_DEBUG_ASSERT(thread->th.th_current_task); 2755 KF_TRACE(10, ("__kmp_get_max_active_levels: thread %d, curtask=%p, " 2756 "curtask_maxaclevel=%d\n", 2757 gtid, thread->th.th_current_task, 2758 thread->th.th_current_task->td_icvs.max_active_levels)); 2759 return thread->th.th_current_task->td_icvs.max_active_levels; 2760 } 2761 2762 KMP_BUILD_ASSERT(sizeof(kmp_sched_t) == sizeof(int)); 2763 KMP_BUILD_ASSERT(sizeof(enum sched_type) == sizeof(int)); 2764 2765 /* Changes def_sched_var ICV values (run-time schedule kind and chunk) */ 2766 void __kmp_set_schedule(int gtid, kmp_sched_t kind, int chunk) { 2767 kmp_info_t *thread; 2768 kmp_sched_t orig_kind; 2769 // kmp_team_t *team; 2770 2771 KF_TRACE(10, ("__kmp_set_schedule: new schedule for thread %d = (%d, %d)\n", 2772 gtid, (int)kind, chunk)); 2773 KMP_DEBUG_ASSERT(__kmp_init_serial); 2774 2775 // Check if the kind parameter is valid, correct if needed. 2776 // Valid parameters should fit in one of two intervals - standard or extended: 2777 // <lower>, <valid>, <upper_std>, <lower_ext>, <valid>, <upper> 2778 // 2008-01-25: 0, 1 - 4, 5, 100, 101 - 102, 103 2779 orig_kind = kind; 2780 kind = __kmp_sched_without_mods(kind); 2781 2782 if (kind <= kmp_sched_lower || kind >= kmp_sched_upper || 2783 (kind <= kmp_sched_lower_ext && kind >= kmp_sched_upper_std)) { 2784 // TODO: Hint needs attention in case we change the default schedule. 2785 __kmp_msg(kmp_ms_warning, KMP_MSG(ScheduleKindOutOfRange, kind), 2786 KMP_HNT(DefaultScheduleKindUsed, "static, no chunk"), 2787 __kmp_msg_null); 2788 kind = kmp_sched_default; 2789 chunk = 0; // ignore chunk value in case of bad kind 2790 } 2791 2792 thread = __kmp_threads[gtid]; 2793 2794 __kmp_save_internal_controls(thread); 2795 2796 if (kind < kmp_sched_upper_std) { 2797 if (kind == kmp_sched_static && chunk < KMP_DEFAULT_CHUNK) { 2798 // differ static chunked vs. unchunked: chunk should be invalid to 2799 // indicate unchunked schedule (which is the default) 2800 thread->th.th_current_task->td_icvs.sched.r_sched_type = kmp_sch_static; 2801 } else { 2802 thread->th.th_current_task->td_icvs.sched.r_sched_type = 2803 __kmp_sch_map[kind - kmp_sched_lower - 1]; 2804 } 2805 } else { 2806 // __kmp_sch_map[ kind - kmp_sched_lower_ext + kmp_sched_upper_std - 2807 // kmp_sched_lower - 2 ]; 2808 thread->th.th_current_task->td_icvs.sched.r_sched_type = 2809 __kmp_sch_map[kind - kmp_sched_lower_ext + kmp_sched_upper_std - 2810 kmp_sched_lower - 2]; 2811 } 2812 __kmp_sched_apply_mods_intkind( 2813 orig_kind, &(thread->th.th_current_task->td_icvs.sched.r_sched_type)); 2814 if (kind == kmp_sched_auto || chunk < 1) { 2815 // ignore parameter chunk for schedule auto 2816 thread->th.th_current_task->td_icvs.sched.chunk = KMP_DEFAULT_CHUNK; 2817 } else { 2818 thread->th.th_current_task->td_icvs.sched.chunk = chunk; 2819 } 2820 } 2821 2822 /* Gets def_sched_var ICV values */ 2823 void __kmp_get_schedule(int gtid, kmp_sched_t *kind, int *chunk) { 2824 kmp_info_t *thread; 2825 enum sched_type th_type; 2826 2827 KF_TRACE(10, ("__kmp_get_schedule: thread %d\n", gtid)); 2828 KMP_DEBUG_ASSERT(__kmp_init_serial); 2829 2830 thread = __kmp_threads[gtid]; 2831 2832 th_type = thread->th.th_current_task->td_icvs.sched.r_sched_type; 2833 switch (SCHEDULE_WITHOUT_MODIFIERS(th_type)) { 2834 case kmp_sch_static: 2835 case kmp_sch_static_greedy: 2836 case kmp_sch_static_balanced: 2837 *kind = kmp_sched_static; 2838 __kmp_sched_apply_mods_stdkind(kind, th_type); 2839 *chunk = 0; // chunk was not set, try to show this fact via zero value 2840 return; 2841 case kmp_sch_static_chunked: 2842 *kind = kmp_sched_static; 2843 break; 2844 case kmp_sch_dynamic_chunked: 2845 *kind = kmp_sched_dynamic; 2846 break; 2847 case kmp_sch_guided_chunked: 2848 case kmp_sch_guided_iterative_chunked: 2849 case kmp_sch_guided_analytical_chunked: 2850 *kind = kmp_sched_guided; 2851 break; 2852 case kmp_sch_auto: 2853 *kind = kmp_sched_auto; 2854 break; 2855 case kmp_sch_trapezoidal: 2856 *kind = kmp_sched_trapezoidal; 2857 break; 2858 #if KMP_STATIC_STEAL_ENABLED 2859 case kmp_sch_static_steal: 2860 *kind = kmp_sched_static_steal; 2861 break; 2862 #endif 2863 default: 2864 KMP_FATAL(UnknownSchedulingType, th_type); 2865 } 2866 2867 __kmp_sched_apply_mods_stdkind(kind, th_type); 2868 *chunk = thread->th.th_current_task->td_icvs.sched.chunk; 2869 } 2870 2871 int __kmp_get_ancestor_thread_num(int gtid, int level) { 2872 2873 int ii, dd; 2874 kmp_team_t *team; 2875 kmp_info_t *thr; 2876 2877 KF_TRACE(10, ("__kmp_get_ancestor_thread_num: thread %d %d\n", gtid, level)); 2878 KMP_DEBUG_ASSERT(__kmp_init_serial); 2879 2880 // validate level 2881 if (level == 0) 2882 return 0; 2883 if (level < 0) 2884 return -1; 2885 thr = __kmp_threads[gtid]; 2886 team = thr->th.th_team; 2887 ii = team->t.t_level; 2888 if (level > ii) 2889 return -1; 2890 2891 if (thr->th.th_teams_microtask) { 2892 // AC: we are in teams region where multiple nested teams have same level 2893 int tlevel = thr->th.th_teams_level; // the level of the teams construct 2894 if (level <= 2895 tlevel) { // otherwise usual algorithm works (will not touch the teams) 2896 KMP_DEBUG_ASSERT(ii >= tlevel); 2897 // AC: As we need to pass by the teams league, we need to artificially 2898 // increase ii 2899 if (ii == tlevel) { 2900 ii += 2; // three teams have same level 2901 } else { 2902 ii++; // two teams have same level 2903 } 2904 } 2905 } 2906 2907 if (ii == level) 2908 return __kmp_tid_from_gtid(gtid); 2909 2910 dd = team->t.t_serialized; 2911 level++; 2912 while (ii > level) { 2913 for (dd = team->t.t_serialized; (dd > 0) && (ii > level); dd--, ii--) { 2914 } 2915 if ((team->t.t_serialized) && (!dd)) { 2916 team = team->t.t_parent; 2917 continue; 2918 } 2919 if (ii > level) { 2920 team = team->t.t_parent; 2921 dd = team->t.t_serialized; 2922 ii--; 2923 } 2924 } 2925 2926 return (dd > 1) ? (0) : (team->t.t_master_tid); 2927 } 2928 2929 int __kmp_get_team_size(int gtid, int level) { 2930 2931 int ii, dd; 2932 kmp_team_t *team; 2933 kmp_info_t *thr; 2934 2935 KF_TRACE(10, ("__kmp_get_team_size: thread %d %d\n", gtid, level)); 2936 KMP_DEBUG_ASSERT(__kmp_init_serial); 2937 2938 // validate level 2939 if (level == 0) 2940 return 1; 2941 if (level < 0) 2942 return -1; 2943 thr = __kmp_threads[gtid]; 2944 team = thr->th.th_team; 2945 ii = team->t.t_level; 2946 if (level > ii) 2947 return -1; 2948 2949 if (thr->th.th_teams_microtask) { 2950 // AC: we are in teams region where multiple nested teams have same level 2951 int tlevel = thr->th.th_teams_level; // the level of the teams construct 2952 if (level <= 2953 tlevel) { // otherwise usual algorithm works (will not touch the teams) 2954 KMP_DEBUG_ASSERT(ii >= tlevel); 2955 // AC: As we need to pass by the teams league, we need to artificially 2956 // increase ii 2957 if (ii == tlevel) { 2958 ii += 2; // three teams have same level 2959 } else { 2960 ii++; // two teams have same level 2961 } 2962 } 2963 } 2964 2965 while (ii > level) { 2966 for (dd = team->t.t_serialized; (dd > 0) && (ii > level); dd--, ii--) { 2967 } 2968 if (team->t.t_serialized && (!dd)) { 2969 team = team->t.t_parent; 2970 continue; 2971 } 2972 if (ii > level) { 2973 team = team->t.t_parent; 2974 ii--; 2975 } 2976 } 2977 2978 return team->t.t_nproc; 2979 } 2980 2981 kmp_r_sched_t __kmp_get_schedule_global() { 2982 // This routine created because pairs (__kmp_sched, __kmp_chunk) and 2983 // (__kmp_static, __kmp_guided) may be changed by kmp_set_defaults 2984 // independently. So one can get the updated schedule here. 2985 2986 kmp_r_sched_t r_sched; 2987 2988 // create schedule from 4 globals: __kmp_sched, __kmp_chunk, __kmp_static, 2989 // __kmp_guided. __kmp_sched should keep original value, so that user can set 2990 // KMP_SCHEDULE multiple times, and thus have different run-time schedules in 2991 // different roots (even in OMP 2.5) 2992 enum sched_type s = SCHEDULE_WITHOUT_MODIFIERS(__kmp_sched); 2993 enum sched_type sched_modifiers = SCHEDULE_GET_MODIFIERS(__kmp_sched); 2994 if (s == kmp_sch_static) { 2995 // replace STATIC with more detailed schedule (balanced or greedy) 2996 r_sched.r_sched_type = __kmp_static; 2997 } else if (s == kmp_sch_guided_chunked) { 2998 // replace GUIDED with more detailed schedule (iterative or analytical) 2999 r_sched.r_sched_type = __kmp_guided; 3000 } else { // (STATIC_CHUNKED), or (DYNAMIC_CHUNKED), or other 3001 r_sched.r_sched_type = __kmp_sched; 3002 } 3003 SCHEDULE_SET_MODIFIERS(r_sched.r_sched_type, sched_modifiers); 3004 3005 if (__kmp_chunk < KMP_DEFAULT_CHUNK) { 3006 // __kmp_chunk may be wrong here (if it was not ever set) 3007 r_sched.chunk = KMP_DEFAULT_CHUNK; 3008 } else { 3009 r_sched.chunk = __kmp_chunk; 3010 } 3011 3012 return r_sched; 3013 } 3014 3015 /* Allocate (realloc == FALSE) * or reallocate (realloc == TRUE) 3016 at least argc number of *t_argv entries for the requested team. */ 3017 static void __kmp_alloc_argv_entries(int argc, kmp_team_t *team, int realloc) { 3018 3019 KMP_DEBUG_ASSERT(team); 3020 if (!realloc || argc > team->t.t_max_argc) { 3021 3022 KA_TRACE(100, ("__kmp_alloc_argv_entries: team %d: needed entries=%d, " 3023 "current entries=%d\n", 3024 team->t.t_id, argc, (realloc) ? team->t.t_max_argc : 0)); 3025 /* if previously allocated heap space for args, free them */ 3026 if (realloc && team->t.t_argv != &team->t.t_inline_argv[0]) 3027 __kmp_free((void *)team->t.t_argv); 3028 3029 if (argc <= KMP_INLINE_ARGV_ENTRIES) { 3030 /* use unused space in the cache line for arguments */ 3031 team->t.t_max_argc = KMP_INLINE_ARGV_ENTRIES; 3032 KA_TRACE(100, ("__kmp_alloc_argv_entries: team %d: inline allocate %d " 3033 "argv entries\n", 3034 team->t.t_id, team->t.t_max_argc)); 3035 team->t.t_argv = &team->t.t_inline_argv[0]; 3036 if (__kmp_storage_map) { 3037 __kmp_print_storage_map_gtid( 3038 -1, &team->t.t_inline_argv[0], 3039 &team->t.t_inline_argv[KMP_INLINE_ARGV_ENTRIES], 3040 (sizeof(void *) * KMP_INLINE_ARGV_ENTRIES), "team_%d.t_inline_argv", 3041 team->t.t_id); 3042 } 3043 } else { 3044 /* allocate space for arguments in the heap */ 3045 team->t.t_max_argc = (argc <= (KMP_MIN_MALLOC_ARGV_ENTRIES >> 1)) 3046 ? KMP_MIN_MALLOC_ARGV_ENTRIES 3047 : 2 * argc; 3048 KA_TRACE(100, ("__kmp_alloc_argv_entries: team %d: dynamic allocate %d " 3049 "argv entries\n", 3050 team->t.t_id, team->t.t_max_argc)); 3051 team->t.t_argv = 3052 (void **)__kmp_page_allocate(sizeof(void *) * team->t.t_max_argc); 3053 if (__kmp_storage_map) { 3054 __kmp_print_storage_map_gtid(-1, &team->t.t_argv[0], 3055 &team->t.t_argv[team->t.t_max_argc], 3056 sizeof(void *) * team->t.t_max_argc, 3057 "team_%d.t_argv", team->t.t_id); 3058 } 3059 } 3060 } 3061 } 3062 3063 static void __kmp_allocate_team_arrays(kmp_team_t *team, int max_nth) { 3064 int i; 3065 int num_disp_buff = max_nth > 1 ? __kmp_dispatch_num_buffers : 2; 3066 team->t.t_threads = 3067 (kmp_info_t **)__kmp_allocate(sizeof(kmp_info_t *) * max_nth); 3068 team->t.t_disp_buffer = (dispatch_shared_info_t *)__kmp_allocate( 3069 sizeof(dispatch_shared_info_t) * num_disp_buff); 3070 team->t.t_dispatch = 3071 (kmp_disp_t *)__kmp_allocate(sizeof(kmp_disp_t) * max_nth); 3072 team->t.t_implicit_task_taskdata = 3073 (kmp_taskdata_t *)__kmp_allocate(sizeof(kmp_taskdata_t) * max_nth); 3074 team->t.t_max_nproc = max_nth; 3075 3076 /* setup dispatch buffers */ 3077 for (i = 0; i < num_disp_buff; ++i) { 3078 team->t.t_disp_buffer[i].buffer_index = i; 3079 team->t.t_disp_buffer[i].doacross_buf_idx = i; 3080 } 3081 } 3082 3083 static void __kmp_free_team_arrays(kmp_team_t *team) { 3084 /* Note: this does not free the threads in t_threads (__kmp_free_threads) */ 3085 int i; 3086 for (i = 0; i < team->t.t_max_nproc; ++i) { 3087 if (team->t.t_dispatch[i].th_disp_buffer != NULL) { 3088 __kmp_free(team->t.t_dispatch[i].th_disp_buffer); 3089 team->t.t_dispatch[i].th_disp_buffer = NULL; 3090 } 3091 } 3092 #if KMP_USE_HIER_SCHED 3093 __kmp_dispatch_free_hierarchies(team); 3094 #endif 3095 __kmp_free(team->t.t_threads); 3096 __kmp_free(team->t.t_disp_buffer); 3097 __kmp_free(team->t.t_dispatch); 3098 __kmp_free(team->t.t_implicit_task_taskdata); 3099 team->t.t_threads = NULL; 3100 team->t.t_disp_buffer = NULL; 3101 team->t.t_dispatch = NULL; 3102 team->t.t_implicit_task_taskdata = 0; 3103 } 3104 3105 static void __kmp_reallocate_team_arrays(kmp_team_t *team, int max_nth) { 3106 kmp_info_t **oldThreads = team->t.t_threads; 3107 3108 __kmp_free(team->t.t_disp_buffer); 3109 __kmp_free(team->t.t_dispatch); 3110 __kmp_free(team->t.t_implicit_task_taskdata); 3111 __kmp_allocate_team_arrays(team, max_nth); 3112 3113 KMP_MEMCPY(team->t.t_threads, oldThreads, 3114 team->t.t_nproc * sizeof(kmp_info_t *)); 3115 3116 __kmp_free(oldThreads); 3117 } 3118 3119 static kmp_internal_control_t __kmp_get_global_icvs(void) { 3120 3121 kmp_r_sched_t r_sched = 3122 __kmp_get_schedule_global(); // get current state of scheduling globals 3123 3124 KMP_DEBUG_ASSERT(__kmp_nested_proc_bind.used > 0); 3125 3126 kmp_internal_control_t g_icvs = { 3127 0, // int serial_nesting_level; //corresponds to value of th_team_serialized 3128 (kmp_int8)__kmp_global.g.g_dynamic, // internal control for dynamic 3129 // adjustment of threads (per thread) 3130 (kmp_int8)__kmp_env_blocktime, // int bt_set; //internal control for 3131 // whether blocktime is explicitly set 3132 __kmp_dflt_blocktime, // int blocktime; //internal control for blocktime 3133 #if KMP_USE_MONITOR 3134 __kmp_bt_intervals, // int bt_intervals; //internal control for blocktime 3135 // intervals 3136 #endif 3137 __kmp_dflt_team_nth, // int nproc; //internal control for # of threads for 3138 // next parallel region (per thread) 3139 // (use a max ub on value if __kmp_parallel_initialize not called yet) 3140 __kmp_cg_max_nth, // int thread_limit; 3141 __kmp_dflt_max_active_levels, // int max_active_levels; //internal control 3142 // for max_active_levels 3143 r_sched, // kmp_r_sched_t sched; //internal control for runtime schedule 3144 // {sched,chunk} pair 3145 __kmp_nested_proc_bind.bind_types[0], 3146 __kmp_default_device, 3147 NULL // struct kmp_internal_control *next; 3148 }; 3149 3150 return g_icvs; 3151 } 3152 3153 static kmp_internal_control_t __kmp_get_x_global_icvs(const kmp_team_t *team) { 3154 3155 kmp_internal_control_t gx_icvs; 3156 gx_icvs.serial_nesting_level = 3157 0; // probably =team->t.t_serial like in save_inter_controls 3158 copy_icvs(&gx_icvs, &team->t.t_threads[0]->th.th_current_task->td_icvs); 3159 gx_icvs.next = NULL; 3160 3161 return gx_icvs; 3162 } 3163 3164 static void __kmp_initialize_root(kmp_root_t *root) { 3165 int f; 3166 kmp_team_t *root_team; 3167 kmp_team_t *hot_team; 3168 int hot_team_max_nth; 3169 kmp_r_sched_t r_sched = 3170 __kmp_get_schedule_global(); // get current state of scheduling globals 3171 kmp_internal_control_t r_icvs = __kmp_get_global_icvs(); 3172 KMP_DEBUG_ASSERT(root); 3173 KMP_ASSERT(!root->r.r_begin); 3174 3175 /* setup the root state structure */ 3176 __kmp_init_lock(&root->r.r_begin_lock); 3177 root->r.r_begin = FALSE; 3178 root->r.r_active = FALSE; 3179 root->r.r_in_parallel = 0; 3180 root->r.r_blocktime = __kmp_dflt_blocktime; 3181 3182 /* setup the root team for this task */ 3183 /* allocate the root team structure */ 3184 KF_TRACE(10, ("__kmp_initialize_root: before root_team\n")); 3185 3186 root_team = 3187 __kmp_allocate_team(root, 3188 1, // new_nproc 3189 1, // max_nproc 3190 #if OMPT_SUPPORT 3191 ompt_data_none, // root parallel id 3192 #endif 3193 __kmp_nested_proc_bind.bind_types[0], &r_icvs, 3194 0 // argc 3195 USE_NESTED_HOT_ARG(NULL) // master thread is unknown 3196 ); 3197 #if USE_DEBUGGER 3198 // Non-NULL value should be assigned to make the debugger display the root 3199 // team. 3200 TCW_SYNC_PTR(root_team->t.t_pkfn, (microtask_t)(~0)); 3201 #endif 3202 3203 KF_TRACE(10, ("__kmp_initialize_root: after root_team = %p\n", root_team)); 3204 3205 root->r.r_root_team = root_team; 3206 root_team->t.t_control_stack_top = NULL; 3207 3208 /* initialize root team */ 3209 root_team->t.t_threads[0] = NULL; 3210 root_team->t.t_nproc = 1; 3211 root_team->t.t_serialized = 1; 3212 // TODO???: root_team->t.t_max_active_levels = __kmp_dflt_max_active_levels; 3213 root_team->t.t_sched.sched = r_sched.sched; 3214 KA_TRACE( 3215 20, 3216 ("__kmp_initialize_root: init root team %d arrived: join=%u, plain=%u\n", 3217 root_team->t.t_id, KMP_INIT_BARRIER_STATE, KMP_INIT_BARRIER_STATE)); 3218 3219 /* setup the hot team for this task */ 3220 /* allocate the hot team structure */ 3221 KF_TRACE(10, ("__kmp_initialize_root: before hot_team\n")); 3222 3223 hot_team = 3224 __kmp_allocate_team(root, 3225 1, // new_nproc 3226 __kmp_dflt_team_nth_ub * 2, // max_nproc 3227 #if OMPT_SUPPORT 3228 ompt_data_none, // root parallel id 3229 #endif 3230 __kmp_nested_proc_bind.bind_types[0], &r_icvs, 3231 0 // argc 3232 USE_NESTED_HOT_ARG(NULL) // master thread is unknown 3233 ); 3234 KF_TRACE(10, ("__kmp_initialize_root: after hot_team = %p\n", hot_team)); 3235 3236 root->r.r_hot_team = hot_team; 3237 root_team->t.t_control_stack_top = NULL; 3238 3239 /* first-time initialization */ 3240 hot_team->t.t_parent = root_team; 3241 3242 /* initialize hot team */ 3243 hot_team_max_nth = hot_team->t.t_max_nproc; 3244 for (f = 0; f < hot_team_max_nth; ++f) { 3245 hot_team->t.t_threads[f] = NULL; 3246 } 3247 hot_team->t.t_nproc = 1; 3248 // TODO???: hot_team->t.t_max_active_levels = __kmp_dflt_max_active_levels; 3249 hot_team->t.t_sched.sched = r_sched.sched; 3250 hot_team->t.t_size_changed = 0; 3251 } 3252 3253 #ifdef KMP_DEBUG 3254 3255 typedef struct kmp_team_list_item { 3256 kmp_team_p const *entry; 3257 struct kmp_team_list_item *next; 3258 } kmp_team_list_item_t; 3259 typedef kmp_team_list_item_t *kmp_team_list_t; 3260 3261 static void __kmp_print_structure_team_accum( // Add team to list of teams. 3262 kmp_team_list_t list, // List of teams. 3263 kmp_team_p const *team // Team to add. 3264 ) { 3265 3266 // List must terminate with item where both entry and next are NULL. 3267 // Team is added to the list only once. 3268 // List is sorted in ascending order by team id. 3269 // Team id is *not* a key. 3270 3271 kmp_team_list_t l; 3272 3273 KMP_DEBUG_ASSERT(list != NULL); 3274 if (team == NULL) { 3275 return; 3276 } 3277 3278 __kmp_print_structure_team_accum(list, team->t.t_parent); 3279 __kmp_print_structure_team_accum(list, team->t.t_next_pool); 3280 3281 // Search list for the team. 3282 l = list; 3283 while (l->next != NULL && l->entry != team) { 3284 l = l->next; 3285 } 3286 if (l->next != NULL) { 3287 return; // Team has been added before, exit. 3288 } 3289 3290 // Team is not found. Search list again for insertion point. 3291 l = list; 3292 while (l->next != NULL && l->entry->t.t_id <= team->t.t_id) { 3293 l = l->next; 3294 } 3295 3296 // Insert team. 3297 { 3298 kmp_team_list_item_t *item = (kmp_team_list_item_t *)KMP_INTERNAL_MALLOC( 3299 sizeof(kmp_team_list_item_t)); 3300 *item = *l; 3301 l->entry = team; 3302 l->next = item; 3303 } 3304 } 3305 3306 static void __kmp_print_structure_team(char const *title, kmp_team_p const *team 3307 3308 ) { 3309 __kmp_printf("%s", title); 3310 if (team != NULL) { 3311 __kmp_printf("%2x %p\n", team->t.t_id, team); 3312 } else { 3313 __kmp_printf(" - (nil)\n"); 3314 } 3315 } 3316 3317 static void __kmp_print_structure_thread(char const *title, 3318 kmp_info_p const *thread) { 3319 __kmp_printf("%s", title); 3320 if (thread != NULL) { 3321 __kmp_printf("%2d %p\n", thread->th.th_info.ds.ds_gtid, thread); 3322 } else { 3323 __kmp_printf(" - (nil)\n"); 3324 } 3325 } 3326 3327 void __kmp_print_structure(void) { 3328 3329 kmp_team_list_t list; 3330 3331 // Initialize list of teams. 3332 list = 3333 (kmp_team_list_item_t *)KMP_INTERNAL_MALLOC(sizeof(kmp_team_list_item_t)); 3334 list->entry = NULL; 3335 list->next = NULL; 3336 3337 __kmp_printf("\n------------------------------\nGlobal Thread " 3338 "Table\n------------------------------\n"); 3339 { 3340 int gtid; 3341 for (gtid = 0; gtid < __kmp_threads_capacity; ++gtid) { 3342 __kmp_printf("%2d", gtid); 3343 if (__kmp_threads != NULL) { 3344 __kmp_printf(" %p", __kmp_threads[gtid]); 3345 } 3346 if (__kmp_root != NULL) { 3347 __kmp_printf(" %p", __kmp_root[gtid]); 3348 } 3349 __kmp_printf("\n"); 3350 } 3351 } 3352 3353 // Print out __kmp_threads array. 3354 __kmp_printf("\n------------------------------\nThreads\n--------------------" 3355 "----------\n"); 3356 if (__kmp_threads != NULL) { 3357 int gtid; 3358 for (gtid = 0; gtid < __kmp_threads_capacity; ++gtid) { 3359 kmp_info_t const *thread = __kmp_threads[gtid]; 3360 if (thread != NULL) { 3361 __kmp_printf("GTID %2d %p:\n", gtid, thread); 3362 __kmp_printf(" Our Root: %p\n", thread->th.th_root); 3363 __kmp_print_structure_team(" Our Team: ", thread->th.th_team); 3364 __kmp_print_structure_team(" Serial Team: ", 3365 thread->th.th_serial_team); 3366 __kmp_printf(" Threads: %2d\n", thread->th.th_team_nproc); 3367 __kmp_print_structure_thread(" Master: ", 3368 thread->th.th_team_master); 3369 __kmp_printf(" Serialized?: %2d\n", thread->th.th_team_serialized); 3370 __kmp_printf(" Set NProc: %2d\n", thread->th.th_set_nproc); 3371 __kmp_printf(" Set Proc Bind: %2d\n", thread->th.th_set_proc_bind); 3372 __kmp_print_structure_thread(" Next in pool: ", 3373 thread->th.th_next_pool); 3374 __kmp_printf("\n"); 3375 __kmp_print_structure_team_accum(list, thread->th.th_team); 3376 __kmp_print_structure_team_accum(list, thread->th.th_serial_team); 3377 } 3378 } 3379 } else { 3380 __kmp_printf("Threads array is not allocated.\n"); 3381 } 3382 3383 // Print out __kmp_root array. 3384 __kmp_printf("\n------------------------------\nUbers\n----------------------" 3385 "--------\n"); 3386 if (__kmp_root != NULL) { 3387 int gtid; 3388 for (gtid = 0; gtid < __kmp_threads_capacity; ++gtid) { 3389 kmp_root_t const *root = __kmp_root[gtid]; 3390 if (root != NULL) { 3391 __kmp_printf("GTID %2d %p:\n", gtid, root); 3392 __kmp_print_structure_team(" Root Team: ", root->r.r_root_team); 3393 __kmp_print_structure_team(" Hot Team: ", root->r.r_hot_team); 3394 __kmp_print_structure_thread(" Uber Thread: ", 3395 root->r.r_uber_thread); 3396 __kmp_printf(" Active?: %2d\n", root->r.r_active); 3397 __kmp_printf(" In Parallel: %2d\n", 3398 KMP_ATOMIC_LD_RLX(&root->r.r_in_parallel)); 3399 __kmp_printf("\n"); 3400 __kmp_print_structure_team_accum(list, root->r.r_root_team); 3401 __kmp_print_structure_team_accum(list, root->r.r_hot_team); 3402 } 3403 } 3404 } else { 3405 __kmp_printf("Ubers array is not allocated.\n"); 3406 } 3407 3408 __kmp_printf("\n------------------------------\nTeams\n----------------------" 3409 "--------\n"); 3410 while (list->next != NULL) { 3411 kmp_team_p const *team = list->entry; 3412 int i; 3413 __kmp_printf("Team %2x %p:\n", team->t.t_id, team); 3414 __kmp_print_structure_team(" Parent Team: ", team->t.t_parent); 3415 __kmp_printf(" Master TID: %2d\n", team->t.t_master_tid); 3416 __kmp_printf(" Max threads: %2d\n", team->t.t_max_nproc); 3417 __kmp_printf(" Levels of serial: %2d\n", team->t.t_serialized); 3418 __kmp_printf(" Number threads: %2d\n", team->t.t_nproc); 3419 for (i = 0; i < team->t.t_nproc; ++i) { 3420 __kmp_printf(" Thread %2d: ", i); 3421 __kmp_print_structure_thread("", team->t.t_threads[i]); 3422 } 3423 __kmp_print_structure_team(" Next in pool: ", team->t.t_next_pool); 3424 __kmp_printf("\n"); 3425 list = list->next; 3426 } 3427 3428 // Print out __kmp_thread_pool and __kmp_team_pool. 3429 __kmp_printf("\n------------------------------\nPools\n----------------------" 3430 "--------\n"); 3431 __kmp_print_structure_thread("Thread pool: ", 3432 CCAST(kmp_info_t *, __kmp_thread_pool)); 3433 __kmp_print_structure_team("Team pool: ", 3434 CCAST(kmp_team_t *, __kmp_team_pool)); 3435 __kmp_printf("\n"); 3436 3437 // Free team list. 3438 while (list != NULL) { 3439 kmp_team_list_item_t *item = list; 3440 list = list->next; 3441 KMP_INTERNAL_FREE(item); 3442 } 3443 } 3444 3445 #endif 3446 3447 //--------------------------------------------------------------------------- 3448 // Stuff for per-thread fast random number generator 3449 // Table of primes 3450 static const unsigned __kmp_primes[] = { 3451 0x9e3779b1, 0xffe6cc59, 0x2109f6dd, 0x43977ab5, 0xba5703f5, 0xb495a877, 3452 0xe1626741, 0x79695e6b, 0xbc98c09f, 0xd5bee2b3, 0x287488f9, 0x3af18231, 3453 0x9677cd4d, 0xbe3a6929, 0xadc6a877, 0xdcf0674b, 0xbe4d6fe9, 0x5f15e201, 3454 0x99afc3fd, 0xf3f16801, 0xe222cfff, 0x24ba5fdb, 0x0620452d, 0x79f149e3, 3455 0xc8b93f49, 0x972702cd, 0xb07dd827, 0x6c97d5ed, 0x085a3d61, 0x46eb5ea7, 3456 0x3d9910ed, 0x2e687b5b, 0x29609227, 0x6eb081f1, 0x0954c4e1, 0x9d114db9, 3457 0x542acfa9, 0xb3e6bd7b, 0x0742d917, 0xe9f3ffa7, 0x54581edb, 0xf2480f45, 3458 0x0bb9288f, 0xef1affc7, 0x85fa0ca7, 0x3ccc14db, 0xe6baf34b, 0x343377f7, 3459 0x5ca19031, 0xe6d9293b, 0xf0a9f391, 0x5d2e980b, 0xfc411073, 0xc3749363, 3460 0xb892d829, 0x3549366b, 0x629750ad, 0xb98294e5, 0x892d9483, 0xc235baf3, 3461 0x3d2402a3, 0x6bdef3c9, 0xbec333cd, 0x40c9520f}; 3462 3463 //--------------------------------------------------------------------------- 3464 // __kmp_get_random: Get a random number using a linear congruential method. 3465 unsigned short __kmp_get_random(kmp_info_t *thread) { 3466 unsigned x = thread->th.th_x; 3467 unsigned short r = (unsigned short)(x >> 16); 3468 3469 thread->th.th_x = x * thread->th.th_a + 1; 3470 3471 KA_TRACE(30, ("__kmp_get_random: THREAD: %d, RETURN: %u\n", 3472 thread->th.th_info.ds.ds_tid, r)); 3473 3474 return r; 3475 } 3476 //-------------------------------------------------------- 3477 // __kmp_init_random: Initialize a random number generator 3478 void __kmp_init_random(kmp_info_t *thread) { 3479 unsigned seed = thread->th.th_info.ds.ds_tid; 3480 3481 thread->th.th_a = 3482 __kmp_primes[seed % (sizeof(__kmp_primes) / sizeof(__kmp_primes[0]))]; 3483 thread->th.th_x = (seed + 1) * thread->th.th_a + 1; 3484 KA_TRACE(30, 3485 ("__kmp_init_random: THREAD: %u; A: %u\n", seed, thread->th.th_a)); 3486 } 3487 3488 #if KMP_OS_WINDOWS 3489 /* reclaim array entries for root threads that are already dead, returns number 3490 * reclaimed */ 3491 static int __kmp_reclaim_dead_roots(void) { 3492 int i, r = 0; 3493 3494 for (i = 0; i < __kmp_threads_capacity; ++i) { 3495 if (KMP_UBER_GTID(i) && 3496 !__kmp_still_running((kmp_info_t *)TCR_SYNC_PTR(__kmp_threads[i])) && 3497 !__kmp_root[i] 3498 ->r.r_active) { // AC: reclaim only roots died in non-active state 3499 r += __kmp_unregister_root_other_thread(i); 3500 } 3501 } 3502 return r; 3503 } 3504 #endif 3505 3506 /* This function attempts to create free entries in __kmp_threads and 3507 __kmp_root, and returns the number of free entries generated. 3508 3509 For Windows* OS static library, the first mechanism used is to reclaim array 3510 entries for root threads that are already dead. 3511 3512 On all platforms, expansion is attempted on the arrays __kmp_threads_ and 3513 __kmp_root, with appropriate update to __kmp_threads_capacity. Array 3514 capacity is increased by doubling with clipping to __kmp_tp_capacity, if 3515 threadprivate cache array has been created. Synchronization with 3516 __kmpc_threadprivate_cached is done using __kmp_tp_cached_lock. 3517 3518 After any dead root reclamation, if the clipping value allows array expansion 3519 to result in the generation of a total of nNeed free slots, the function does 3520 that expansion. If not, nothing is done beyond the possible initial root 3521 thread reclamation. 3522 3523 If any argument is negative, the behavior is undefined. */ 3524 static int __kmp_expand_threads(int nNeed) { 3525 int added = 0; 3526 int minimumRequiredCapacity; 3527 int newCapacity; 3528 kmp_info_t **newThreads; 3529 kmp_root_t **newRoot; 3530 3531 // All calls to __kmp_expand_threads should be under __kmp_forkjoin_lock, so 3532 // resizing __kmp_threads does not need additional protection if foreign 3533 // threads are present 3534 3535 #if KMP_OS_WINDOWS && !KMP_DYNAMIC_LIB 3536 /* only for Windows static library */ 3537 /* reclaim array entries for root threads that are already dead */ 3538 added = __kmp_reclaim_dead_roots(); 3539 3540 if (nNeed) { 3541 nNeed -= added; 3542 if (nNeed < 0) 3543 nNeed = 0; 3544 } 3545 #endif 3546 if (nNeed <= 0) 3547 return added; 3548 3549 // Note that __kmp_threads_capacity is not bounded by __kmp_max_nth. If 3550 // __kmp_max_nth is set to some value less than __kmp_sys_max_nth by the 3551 // user via KMP_DEVICE_THREAD_LIMIT, then __kmp_threads_capacity may become 3552 // > __kmp_max_nth in one of two ways: 3553 // 3554 // 1) The initialization thread (gtid = 0) exits. __kmp_threads[0] 3555 // may not be reused by another thread, so we may need to increase 3556 // __kmp_threads_capacity to __kmp_max_nth + 1. 3557 // 3558 // 2) New foreign root(s) are encountered. We always register new foreign 3559 // roots. This may cause a smaller # of threads to be allocated at 3560 // subsequent parallel regions, but the worker threads hang around (and 3561 // eventually go to sleep) and need slots in the __kmp_threads[] array. 3562 // 3563 // Anyway, that is the reason for moving the check to see if 3564 // __kmp_max_nth was exceeded into __kmp_reserve_threads() 3565 // instead of having it performed here. -BB 3566 3567 KMP_DEBUG_ASSERT(__kmp_sys_max_nth >= __kmp_threads_capacity); 3568 3569 /* compute expansion headroom to check if we can expand */ 3570 if (__kmp_sys_max_nth - __kmp_threads_capacity < nNeed) { 3571 /* possible expansion too small -- give up */ 3572 return added; 3573 } 3574 minimumRequiredCapacity = __kmp_threads_capacity + nNeed; 3575 3576 newCapacity = __kmp_threads_capacity; 3577 do { 3578 newCapacity = newCapacity <= (__kmp_sys_max_nth >> 1) ? (newCapacity << 1) 3579 : __kmp_sys_max_nth; 3580 } while (newCapacity < minimumRequiredCapacity); 3581 newThreads = (kmp_info_t **)__kmp_allocate( 3582 (sizeof(kmp_info_t *) + sizeof(kmp_root_t *)) * newCapacity + CACHE_LINE); 3583 newRoot = 3584 (kmp_root_t **)((char *)newThreads + sizeof(kmp_info_t *) * newCapacity); 3585 KMP_MEMCPY(newThreads, __kmp_threads, 3586 __kmp_threads_capacity * sizeof(kmp_info_t *)); 3587 KMP_MEMCPY(newRoot, __kmp_root, 3588 __kmp_threads_capacity * sizeof(kmp_root_t *)); 3589 3590 kmp_info_t **temp_threads = __kmp_threads; 3591 *(kmp_info_t * *volatile *)&__kmp_threads = newThreads; 3592 *(kmp_root_t * *volatile *)&__kmp_root = newRoot; 3593 __kmp_free(temp_threads); 3594 added += newCapacity - __kmp_threads_capacity; 3595 *(volatile int *)&__kmp_threads_capacity = newCapacity; 3596 3597 if (newCapacity > __kmp_tp_capacity) { 3598 __kmp_acquire_bootstrap_lock(&__kmp_tp_cached_lock); 3599 if (__kmp_tp_cached && newCapacity > __kmp_tp_capacity) { 3600 __kmp_threadprivate_resize_cache(newCapacity); 3601 } else { // increase __kmp_tp_capacity to correspond with kmp_threads size 3602 *(volatile int *)&__kmp_tp_capacity = newCapacity; 3603 } 3604 __kmp_release_bootstrap_lock(&__kmp_tp_cached_lock); 3605 } 3606 3607 return added; 3608 } 3609 3610 /* Register the current thread as a root thread and obtain our gtid. We must 3611 have the __kmp_initz_lock held at this point. Argument TRUE only if are the 3612 thread that calls from __kmp_do_serial_initialize() */ 3613 int __kmp_register_root(int initial_thread) { 3614 kmp_info_t *root_thread; 3615 kmp_root_t *root; 3616 int gtid; 3617 int capacity; 3618 __kmp_acquire_bootstrap_lock(&__kmp_forkjoin_lock); 3619 KA_TRACE(20, ("__kmp_register_root: entered\n")); 3620 KMP_MB(); 3621 3622 /* 2007-03-02: 3623 If initial thread did not invoke OpenMP RTL yet, and this thread is not an 3624 initial one, "__kmp_all_nth >= __kmp_threads_capacity" condition does not 3625 work as expected -- it may return false (that means there is at least one 3626 empty slot in __kmp_threads array), but it is possible the only free slot 3627 is #0, which is reserved for initial thread and so cannot be used for this 3628 one. Following code workarounds this bug. 3629 3630 However, right solution seems to be not reserving slot #0 for initial 3631 thread because: 3632 (1) there is no magic in slot #0, 3633 (2) we cannot detect initial thread reliably (the first thread which does 3634 serial initialization may be not a real initial thread). 3635 */ 3636 capacity = __kmp_threads_capacity; 3637 if (!initial_thread && TCR_PTR(__kmp_threads[0]) == NULL) { 3638 --capacity; 3639 } 3640 3641 // If it is not for initializing the hidden helper team, we need to take 3642 // __kmp_hidden_helper_threads_num out of the capacity because it is included 3643 // in __kmp_threads_capacity. 3644 if (__kmp_enable_hidden_helper && !TCR_4(__kmp_init_hidden_helper_threads)) { 3645 capacity -= __kmp_hidden_helper_threads_num; 3646 } 3647 3648 /* see if there are too many threads */ 3649 if (__kmp_all_nth >= capacity && !__kmp_expand_threads(1)) { 3650 if (__kmp_tp_cached) { 3651 __kmp_fatal(KMP_MSG(CantRegisterNewThread), 3652 KMP_HNT(Set_ALL_THREADPRIVATE, __kmp_tp_capacity), 3653 KMP_HNT(PossibleSystemLimitOnThreads), __kmp_msg_null); 3654 } else { 3655 __kmp_fatal(KMP_MSG(CantRegisterNewThread), KMP_HNT(SystemLimitOnThreads), 3656 __kmp_msg_null); 3657 } 3658 } 3659 3660 // When hidden helper task is enabled, __kmp_threads is organized as follows: 3661 // 0: initial thread, also a regular OpenMP thread. 3662 // [1, __kmp_hidden_helper_threads_num]: slots for hidden helper threads. 3663 // [__kmp_hidden_helper_threads_num + 1, __kmp_threads_capacity): slots for 3664 // regular OpenMP threads. 3665 if (TCR_4(__kmp_init_hidden_helper_threads)) { 3666 // Find an available thread slot for hidden helper thread. Slots for hidden 3667 // helper threads start from 1 to __kmp_hidden_helper_threads_num. 3668 for (gtid = 1; TCR_PTR(__kmp_threads[gtid]) != NULL && 3669 gtid <= __kmp_hidden_helper_threads_num; 3670 gtid++) 3671 ; 3672 KMP_ASSERT(gtid <= __kmp_hidden_helper_threads_num); 3673 KA_TRACE(1, ("__kmp_register_root: found slot in threads array for " 3674 "hidden helper thread: T#%d\n", 3675 gtid)); 3676 } else { 3677 /* find an available thread slot */ 3678 // Don't reassign the zero slot since we need that to only be used by 3679 // initial thread. Slots for hidden helper threads should also be skipped. 3680 if (initial_thread && TCR_PTR(__kmp_threads[0]) == NULL) { 3681 gtid = 0; 3682 } else { 3683 for (gtid = __kmp_hidden_helper_threads_num + 1; 3684 TCR_PTR(__kmp_threads[gtid]) != NULL; gtid++) 3685 ; 3686 } 3687 KA_TRACE( 3688 1, ("__kmp_register_root: found slot in threads array: T#%d\n", gtid)); 3689 KMP_ASSERT(gtid < __kmp_threads_capacity); 3690 } 3691 3692 /* update global accounting */ 3693 __kmp_all_nth++; 3694 TCW_4(__kmp_nth, __kmp_nth + 1); 3695 3696 // if __kmp_adjust_gtid_mode is set, then we use method #1 (sp search) for low 3697 // numbers of procs, and method #2 (keyed API call) for higher numbers. 3698 if (__kmp_adjust_gtid_mode) { 3699 if (__kmp_all_nth >= __kmp_tls_gtid_min) { 3700 if (TCR_4(__kmp_gtid_mode) != 2) { 3701 TCW_4(__kmp_gtid_mode, 2); 3702 } 3703 } else { 3704 if (TCR_4(__kmp_gtid_mode) != 1) { 3705 TCW_4(__kmp_gtid_mode, 1); 3706 } 3707 } 3708 } 3709 3710 #ifdef KMP_ADJUST_BLOCKTIME 3711 /* Adjust blocktime to zero if necessary */ 3712 /* Middle initialization might not have occurred yet */ 3713 if (!__kmp_env_blocktime && (__kmp_avail_proc > 0)) { 3714 if (__kmp_nth > __kmp_avail_proc) { 3715 __kmp_zero_bt = TRUE; 3716 } 3717 } 3718 #endif /* KMP_ADJUST_BLOCKTIME */ 3719 3720 /* setup this new hierarchy */ 3721 if (!(root = __kmp_root[gtid])) { 3722 root = __kmp_root[gtid] = (kmp_root_t *)__kmp_allocate(sizeof(kmp_root_t)); 3723 KMP_DEBUG_ASSERT(!root->r.r_root_team); 3724 } 3725 3726 #if KMP_STATS_ENABLED 3727 // Initialize stats as soon as possible (right after gtid assignment). 3728 __kmp_stats_thread_ptr = __kmp_stats_list->push_back(gtid); 3729 __kmp_stats_thread_ptr->startLife(); 3730 KMP_SET_THREAD_STATE(SERIAL_REGION); 3731 KMP_INIT_PARTITIONED_TIMERS(OMP_serial); 3732 #endif 3733 __kmp_initialize_root(root); 3734 3735 /* setup new root thread structure */ 3736 if (root->r.r_uber_thread) { 3737 root_thread = root->r.r_uber_thread; 3738 } else { 3739 root_thread = (kmp_info_t *)__kmp_allocate(sizeof(kmp_info_t)); 3740 if (__kmp_storage_map) { 3741 __kmp_print_thread_storage_map(root_thread, gtid); 3742 } 3743 root_thread->th.th_info.ds.ds_gtid = gtid; 3744 #if OMPT_SUPPORT 3745 root_thread->th.ompt_thread_info.thread_data = ompt_data_none; 3746 #endif 3747 root_thread->th.th_root = root; 3748 if (__kmp_env_consistency_check) { 3749 root_thread->th.th_cons = __kmp_allocate_cons_stack(gtid); 3750 } 3751 #if USE_FAST_MEMORY 3752 __kmp_initialize_fast_memory(root_thread); 3753 #endif /* USE_FAST_MEMORY */ 3754 3755 #if KMP_USE_BGET 3756 KMP_DEBUG_ASSERT(root_thread->th.th_local.bget_data == NULL); 3757 __kmp_initialize_bget(root_thread); 3758 #endif 3759 __kmp_init_random(root_thread); // Initialize random number generator 3760 } 3761 3762 /* setup the serial team held in reserve by the root thread */ 3763 if (!root_thread->th.th_serial_team) { 3764 kmp_internal_control_t r_icvs = __kmp_get_global_icvs(); 3765 KF_TRACE(10, ("__kmp_register_root: before serial_team\n")); 3766 root_thread->th.th_serial_team = __kmp_allocate_team( 3767 root, 1, 1, 3768 #if OMPT_SUPPORT 3769 ompt_data_none, // root parallel id 3770 #endif 3771 proc_bind_default, &r_icvs, 0 USE_NESTED_HOT_ARG(NULL)); 3772 } 3773 KMP_ASSERT(root_thread->th.th_serial_team); 3774 KF_TRACE(10, ("__kmp_register_root: after serial_team = %p\n", 3775 root_thread->th.th_serial_team)); 3776 3777 /* drop root_thread into place */ 3778 TCW_SYNC_PTR(__kmp_threads[gtid], root_thread); 3779 3780 root->r.r_root_team->t.t_threads[0] = root_thread; 3781 root->r.r_hot_team->t.t_threads[0] = root_thread; 3782 root_thread->th.th_serial_team->t.t_threads[0] = root_thread; 3783 // AC: the team created in reserve, not for execution (it is unused for now). 3784 root_thread->th.th_serial_team->t.t_serialized = 0; 3785 root->r.r_uber_thread = root_thread; 3786 3787 /* initialize the thread, get it ready to go */ 3788 __kmp_initialize_info(root_thread, root->r.r_root_team, 0, gtid); 3789 TCW_4(__kmp_init_gtid, TRUE); 3790 3791 /* prepare the master thread for get_gtid() */ 3792 __kmp_gtid_set_specific(gtid); 3793 3794 #if USE_ITT_BUILD 3795 __kmp_itt_thread_name(gtid); 3796 #endif /* USE_ITT_BUILD */ 3797 3798 #ifdef KMP_TDATA_GTID 3799 __kmp_gtid = gtid; 3800 #endif 3801 __kmp_create_worker(gtid, root_thread, __kmp_stksize); 3802 KMP_DEBUG_ASSERT(__kmp_gtid_get_specific() == gtid); 3803 3804 KA_TRACE(20, ("__kmp_register_root: T#%d init T#%d(%d:%d) arrived: join=%u, " 3805 "plain=%u\n", 3806 gtid, __kmp_gtid_from_tid(0, root->r.r_hot_team), 3807 root->r.r_hot_team->t.t_id, 0, KMP_INIT_BARRIER_STATE, 3808 KMP_INIT_BARRIER_STATE)); 3809 { // Initialize barrier data. 3810 int b; 3811 for (b = 0; b < bs_last_barrier; ++b) { 3812 root_thread->th.th_bar[b].bb.b_arrived = KMP_INIT_BARRIER_STATE; 3813 #if USE_DEBUGGER 3814 root_thread->th.th_bar[b].bb.b_worker_arrived = 0; 3815 #endif 3816 } 3817 } 3818 KMP_DEBUG_ASSERT(root->r.r_hot_team->t.t_bar[bs_forkjoin_barrier].b_arrived == 3819 KMP_INIT_BARRIER_STATE); 3820 3821 #if KMP_AFFINITY_SUPPORTED 3822 root_thread->th.th_current_place = KMP_PLACE_UNDEFINED; 3823 root_thread->th.th_new_place = KMP_PLACE_UNDEFINED; 3824 root_thread->th.th_first_place = KMP_PLACE_UNDEFINED; 3825 root_thread->th.th_last_place = KMP_PLACE_UNDEFINED; 3826 if (TCR_4(__kmp_init_middle)) { 3827 __kmp_affinity_set_init_mask(gtid, TRUE); 3828 } 3829 #endif /* KMP_AFFINITY_SUPPORTED */ 3830 root_thread->th.th_def_allocator = __kmp_def_allocator; 3831 root_thread->th.th_prev_level = 0; 3832 root_thread->th.th_prev_num_threads = 1; 3833 3834 kmp_cg_root_t *tmp = (kmp_cg_root_t *)__kmp_allocate(sizeof(kmp_cg_root_t)); 3835 tmp->cg_root = root_thread; 3836 tmp->cg_thread_limit = __kmp_cg_max_nth; 3837 tmp->cg_nthreads = 1; 3838 KA_TRACE(100, ("__kmp_register_root: Thread %p created node %p with" 3839 " cg_nthreads init to 1\n", 3840 root_thread, tmp)); 3841 tmp->up = NULL; 3842 root_thread->th.th_cg_roots = tmp; 3843 3844 __kmp_root_counter++; 3845 3846 #if OMPT_SUPPORT 3847 if (!initial_thread && ompt_enabled.enabled) { 3848 3849 kmp_info_t *root_thread = ompt_get_thread(); 3850 3851 ompt_set_thread_state(root_thread, ompt_state_overhead); 3852 3853 if (ompt_enabled.ompt_callback_thread_begin) { 3854 ompt_callbacks.ompt_callback(ompt_callback_thread_begin)( 3855 ompt_thread_initial, __ompt_get_thread_data_internal()); 3856 } 3857 ompt_data_t *task_data; 3858 ompt_data_t *parallel_data; 3859 __ompt_get_task_info_internal(0, NULL, &task_data, NULL, ¶llel_data, NULL); 3860 if (ompt_enabled.ompt_callback_implicit_task) { 3861 ompt_callbacks.ompt_callback(ompt_callback_implicit_task)( 3862 ompt_scope_begin, parallel_data, task_data, 1, 1, ompt_task_initial); 3863 } 3864 3865 ompt_set_thread_state(root_thread, ompt_state_work_serial); 3866 } 3867 #endif 3868 3869 KMP_MB(); 3870 __kmp_release_bootstrap_lock(&__kmp_forkjoin_lock); 3871 3872 return gtid; 3873 } 3874 3875 #if KMP_NESTED_HOT_TEAMS 3876 static int __kmp_free_hot_teams(kmp_root_t *root, kmp_info_t *thr, int level, 3877 const int max_level) { 3878 int i, n, nth; 3879 kmp_hot_team_ptr_t *hot_teams = thr->th.th_hot_teams; 3880 if (!hot_teams || !hot_teams[level].hot_team) { 3881 return 0; 3882 } 3883 KMP_DEBUG_ASSERT(level < max_level); 3884 kmp_team_t *team = hot_teams[level].hot_team; 3885 nth = hot_teams[level].hot_team_nth; 3886 n = nth - 1; // master is not freed 3887 if (level < max_level - 1) { 3888 for (i = 0; i < nth; ++i) { 3889 kmp_info_t *th = team->t.t_threads[i]; 3890 n += __kmp_free_hot_teams(root, th, level + 1, max_level); 3891 if (i > 0 && th->th.th_hot_teams) { 3892 __kmp_free(th->th.th_hot_teams); 3893 th->th.th_hot_teams = NULL; 3894 } 3895 } 3896 } 3897 __kmp_free_team(root, team, NULL); 3898 return n; 3899 } 3900 #endif 3901 3902 // Resets a root thread and clear its root and hot teams. 3903 // Returns the number of __kmp_threads entries directly and indirectly freed. 3904 static int __kmp_reset_root(int gtid, kmp_root_t *root) { 3905 kmp_team_t *root_team = root->r.r_root_team; 3906 kmp_team_t *hot_team = root->r.r_hot_team; 3907 int n = hot_team->t.t_nproc; 3908 int i; 3909 3910 KMP_DEBUG_ASSERT(!root->r.r_active); 3911 3912 root->r.r_root_team = NULL; 3913 root->r.r_hot_team = NULL; 3914 // __kmp_free_team() does not free hot teams, so we have to clear r_hot_team 3915 // before call to __kmp_free_team(). 3916 __kmp_free_team(root, root_team USE_NESTED_HOT_ARG(NULL)); 3917 #if KMP_NESTED_HOT_TEAMS 3918 if (__kmp_hot_teams_max_level > 3919 0) { // need to free nested hot teams and their threads if any 3920 for (i = 0; i < hot_team->t.t_nproc; ++i) { 3921 kmp_info_t *th = hot_team->t.t_threads[i]; 3922 if (__kmp_hot_teams_max_level > 1) { 3923 n += __kmp_free_hot_teams(root, th, 1, __kmp_hot_teams_max_level); 3924 } 3925 if (th->th.th_hot_teams) { 3926 __kmp_free(th->th.th_hot_teams); 3927 th->th.th_hot_teams = NULL; 3928 } 3929 } 3930 } 3931 #endif 3932 __kmp_free_team(root, hot_team USE_NESTED_HOT_ARG(NULL)); 3933 3934 // Before we can reap the thread, we need to make certain that all other 3935 // threads in the teams that had this root as ancestor have stopped trying to 3936 // steal tasks. 3937 if (__kmp_tasking_mode != tskm_immediate_exec) { 3938 __kmp_wait_to_unref_task_teams(); 3939 } 3940 3941 #if KMP_OS_WINDOWS 3942 /* Close Handle of root duplicated in __kmp_create_worker (tr #62919) */ 3943 KA_TRACE( 3944 10, ("__kmp_reset_root: free handle, th = %p, handle = %" KMP_UINTPTR_SPEC 3945 "\n", 3946 (LPVOID) & (root->r.r_uber_thread->th), 3947 root->r.r_uber_thread->th.th_info.ds.ds_thread)); 3948 __kmp_free_handle(root->r.r_uber_thread->th.th_info.ds.ds_thread); 3949 #endif /* KMP_OS_WINDOWS */ 3950 3951 #if OMPT_SUPPORT 3952 ompt_data_t *task_data; 3953 ompt_data_t *parallel_data; 3954 __ompt_get_task_info_internal(0, NULL, &task_data, NULL, ¶llel_data, NULL); 3955 if (ompt_enabled.ompt_callback_implicit_task) { 3956 ompt_callbacks.ompt_callback(ompt_callback_implicit_task)( 3957 ompt_scope_end, parallel_data, task_data, 0, 1, ompt_task_initial); 3958 } 3959 if (ompt_enabled.ompt_callback_thread_end) { 3960 ompt_callbacks.ompt_callback(ompt_callback_thread_end)( 3961 &(root->r.r_uber_thread->th.ompt_thread_info.thread_data)); 3962 } 3963 #endif 3964 3965 TCW_4(__kmp_nth, 3966 __kmp_nth - 1); // __kmp_reap_thread will decrement __kmp_all_nth. 3967 i = root->r.r_uber_thread->th.th_cg_roots->cg_nthreads--; 3968 KA_TRACE(100, ("__kmp_reset_root: Thread %p decrement cg_nthreads on node %p" 3969 " to %d\n", 3970 root->r.r_uber_thread, root->r.r_uber_thread->th.th_cg_roots, 3971 root->r.r_uber_thread->th.th_cg_roots->cg_nthreads)); 3972 if (i == 1) { 3973 // need to free contention group structure 3974 KMP_DEBUG_ASSERT(root->r.r_uber_thread == 3975 root->r.r_uber_thread->th.th_cg_roots->cg_root); 3976 KMP_DEBUG_ASSERT(root->r.r_uber_thread->th.th_cg_roots->up == NULL); 3977 __kmp_free(root->r.r_uber_thread->th.th_cg_roots); 3978 root->r.r_uber_thread->th.th_cg_roots = NULL; 3979 } 3980 __kmp_reap_thread(root->r.r_uber_thread, 1); 3981 3982 // We canot put root thread to __kmp_thread_pool, so we have to reap it 3983 // instead of freeing. 3984 root->r.r_uber_thread = NULL; 3985 /* mark root as no longer in use */ 3986 root->r.r_begin = FALSE; 3987 3988 return n; 3989 } 3990 3991 void __kmp_unregister_root_current_thread(int gtid) { 3992 KA_TRACE(1, ("__kmp_unregister_root_current_thread: enter T#%d\n", gtid)); 3993 /* this lock should be ok, since unregister_root_current_thread is never 3994 called during an abort, only during a normal close. furthermore, if you 3995 have the forkjoin lock, you should never try to get the initz lock */ 3996 __kmp_acquire_bootstrap_lock(&__kmp_forkjoin_lock); 3997 if (TCR_4(__kmp_global.g.g_done) || !__kmp_init_serial) { 3998 KC_TRACE(10, ("__kmp_unregister_root_current_thread: already finished, " 3999 "exiting T#%d\n", 4000 gtid)); 4001 __kmp_release_bootstrap_lock(&__kmp_forkjoin_lock); 4002 return; 4003 } 4004 kmp_root_t *root = __kmp_root[gtid]; 4005 4006 KMP_DEBUG_ASSERT(__kmp_threads && __kmp_threads[gtid]); 4007 KMP_ASSERT(KMP_UBER_GTID(gtid)); 4008 KMP_ASSERT(root == __kmp_threads[gtid]->th.th_root); 4009 KMP_ASSERT(root->r.r_active == FALSE); 4010 4011 KMP_MB(); 4012 4013 kmp_info_t *thread = __kmp_threads[gtid]; 4014 kmp_team_t *team = thread->th.th_team; 4015 kmp_task_team_t *task_team = thread->th.th_task_team; 4016 4017 // we need to wait for the proxy tasks before finishing the thread 4018 if (task_team != NULL && task_team->tt.tt_found_proxy_tasks) { 4019 #if OMPT_SUPPORT 4020 // the runtime is shutting down so we won't report any events 4021 thread->th.ompt_thread_info.state = ompt_state_undefined; 4022 #endif 4023 __kmp_task_team_wait(thread, team USE_ITT_BUILD_ARG(NULL)); 4024 } 4025 4026 __kmp_reset_root(gtid, root); 4027 4028 KMP_MB(); 4029 KC_TRACE(10, 4030 ("__kmp_unregister_root_current_thread: T#%d unregistered\n", gtid)); 4031 4032 __kmp_release_bootstrap_lock(&__kmp_forkjoin_lock); 4033 } 4034 4035 #if KMP_OS_WINDOWS 4036 /* __kmp_forkjoin_lock must be already held 4037 Unregisters a root thread that is not the current thread. Returns the number 4038 of __kmp_threads entries freed as a result. */ 4039 static int __kmp_unregister_root_other_thread(int gtid) { 4040 kmp_root_t *root = __kmp_root[gtid]; 4041 int r; 4042 4043 KA_TRACE(1, ("__kmp_unregister_root_other_thread: enter T#%d\n", gtid)); 4044 KMP_DEBUG_ASSERT(__kmp_threads && __kmp_threads[gtid]); 4045 KMP_ASSERT(KMP_UBER_GTID(gtid)); 4046 KMP_ASSERT(root == __kmp_threads[gtid]->th.th_root); 4047 KMP_ASSERT(root->r.r_active == FALSE); 4048 4049 r = __kmp_reset_root(gtid, root); 4050 KC_TRACE(10, 4051 ("__kmp_unregister_root_other_thread: T#%d unregistered\n", gtid)); 4052 return r; 4053 } 4054 #endif 4055 4056 #if KMP_DEBUG 4057 void __kmp_task_info() { 4058 4059 kmp_int32 gtid = __kmp_entry_gtid(); 4060 kmp_int32 tid = __kmp_tid_from_gtid(gtid); 4061 kmp_info_t *this_thr = __kmp_threads[gtid]; 4062 kmp_team_t *steam = this_thr->th.th_serial_team; 4063 kmp_team_t *team = this_thr->th.th_team; 4064 4065 __kmp_printf( 4066 "__kmp_task_info: gtid=%d tid=%d t_thread=%p team=%p steam=%p curtask=%p " 4067 "ptask=%p\n", 4068 gtid, tid, this_thr, team, steam, this_thr->th.th_current_task, 4069 team->t.t_implicit_task_taskdata[tid].td_parent); 4070 } 4071 #endif // KMP_DEBUG 4072 4073 /* TODO optimize with one big memclr, take out what isn't needed, split 4074 responsibility to workers as much as possible, and delay initialization of 4075 features as much as possible */ 4076 static void __kmp_initialize_info(kmp_info_t *this_thr, kmp_team_t *team, 4077 int tid, int gtid) { 4078 /* this_thr->th.th_info.ds.ds_gtid is setup in 4079 kmp_allocate_thread/create_worker. 4080 this_thr->th.th_serial_team is setup in __kmp_allocate_thread */ 4081 kmp_info_t *master = team->t.t_threads[0]; 4082 KMP_DEBUG_ASSERT(this_thr != NULL); 4083 KMP_DEBUG_ASSERT(this_thr->th.th_serial_team); 4084 KMP_DEBUG_ASSERT(team); 4085 KMP_DEBUG_ASSERT(team->t.t_threads); 4086 KMP_DEBUG_ASSERT(team->t.t_dispatch); 4087 KMP_DEBUG_ASSERT(master); 4088 KMP_DEBUG_ASSERT(master->th.th_root); 4089 4090 KMP_MB(); 4091 4092 TCW_SYNC_PTR(this_thr->th.th_team, team); 4093 4094 this_thr->th.th_info.ds.ds_tid = tid; 4095 this_thr->th.th_set_nproc = 0; 4096 if (__kmp_tasking_mode != tskm_immediate_exec) 4097 // When tasking is possible, threads are not safe to reap until they are 4098 // done tasking; this will be set when tasking code is exited in wait 4099 this_thr->th.th_reap_state = KMP_NOT_SAFE_TO_REAP; 4100 else // no tasking --> always safe to reap 4101 this_thr->th.th_reap_state = KMP_SAFE_TO_REAP; 4102 this_thr->th.th_set_proc_bind = proc_bind_default; 4103 #if KMP_AFFINITY_SUPPORTED 4104 this_thr->th.th_new_place = this_thr->th.th_current_place; 4105 #endif 4106 this_thr->th.th_root = master->th.th_root; 4107 4108 /* setup the thread's cache of the team structure */ 4109 this_thr->th.th_team_nproc = team->t.t_nproc; 4110 this_thr->th.th_team_master = master; 4111 this_thr->th.th_team_serialized = team->t.t_serialized; 4112 TCW_PTR(this_thr->th.th_sleep_loc, NULL); 4113 4114 KMP_DEBUG_ASSERT(team->t.t_implicit_task_taskdata); 4115 4116 KF_TRACE(10, ("__kmp_initialize_info1: T#%d:%d this_thread=%p curtask=%p\n", 4117 tid, gtid, this_thr, this_thr->th.th_current_task)); 4118 4119 __kmp_init_implicit_task(this_thr->th.th_team_master->th.th_ident, this_thr, 4120 team, tid, TRUE); 4121 4122 KF_TRACE(10, ("__kmp_initialize_info2: T#%d:%d this_thread=%p curtask=%p\n", 4123 tid, gtid, this_thr, this_thr->th.th_current_task)); 4124 // TODO: Initialize ICVs from parent; GEH - isn't that already done in 4125 // __kmp_initialize_team()? 4126 4127 /* TODO no worksharing in speculative threads */ 4128 this_thr->th.th_dispatch = &team->t.t_dispatch[tid]; 4129 4130 this_thr->th.th_local.this_construct = 0; 4131 4132 if (!this_thr->th.th_pri_common) { 4133 this_thr->th.th_pri_common = 4134 (struct common_table *)__kmp_allocate(sizeof(struct common_table)); 4135 if (__kmp_storage_map) { 4136 __kmp_print_storage_map_gtid( 4137 gtid, this_thr->th.th_pri_common, this_thr->th.th_pri_common + 1, 4138 sizeof(struct common_table), "th_%d.th_pri_common\n", gtid); 4139 } 4140 this_thr->th.th_pri_head = NULL; 4141 } 4142 4143 if (this_thr != master && // Master's CG root is initialized elsewhere 4144 this_thr->th.th_cg_roots != master->th.th_cg_roots) { // CG root not set 4145 // Make new thread's CG root same as master's 4146 KMP_DEBUG_ASSERT(master->th.th_cg_roots); 4147 kmp_cg_root_t *tmp = this_thr->th.th_cg_roots; 4148 if (tmp) { 4149 // worker changes CG, need to check if old CG should be freed 4150 int i = tmp->cg_nthreads--; 4151 KA_TRACE(100, ("__kmp_initialize_info: Thread %p decrement cg_nthreads" 4152 " on node %p of thread %p to %d\n", 4153 this_thr, tmp, tmp->cg_root, tmp->cg_nthreads)); 4154 if (i == 1) { 4155 __kmp_free(tmp); // last thread left CG --> free it 4156 } 4157 } 4158 this_thr->th.th_cg_roots = master->th.th_cg_roots; 4159 // Increment new thread's CG root's counter to add the new thread 4160 this_thr->th.th_cg_roots->cg_nthreads++; 4161 KA_TRACE(100, ("__kmp_initialize_info: Thread %p increment cg_nthreads on" 4162 " node %p of thread %p to %d\n", 4163 this_thr, this_thr->th.th_cg_roots, 4164 this_thr->th.th_cg_roots->cg_root, 4165 this_thr->th.th_cg_roots->cg_nthreads)); 4166 this_thr->th.th_current_task->td_icvs.thread_limit = 4167 this_thr->th.th_cg_roots->cg_thread_limit; 4168 } 4169 4170 /* Initialize dynamic dispatch */ 4171 { 4172 volatile kmp_disp_t *dispatch = this_thr->th.th_dispatch; 4173 // Use team max_nproc since this will never change for the team. 4174 size_t disp_size = 4175 sizeof(dispatch_private_info_t) * 4176 (team->t.t_max_nproc == 1 ? 1 : __kmp_dispatch_num_buffers); 4177 KD_TRACE(10, ("__kmp_initialize_info: T#%d max_nproc: %d\n", gtid, 4178 team->t.t_max_nproc)); 4179 KMP_ASSERT(dispatch); 4180 KMP_DEBUG_ASSERT(team->t.t_dispatch); 4181 KMP_DEBUG_ASSERT(dispatch == &team->t.t_dispatch[tid]); 4182 4183 dispatch->th_disp_index = 0; 4184 dispatch->th_doacross_buf_idx = 0; 4185 if (!dispatch->th_disp_buffer) { 4186 dispatch->th_disp_buffer = 4187 (dispatch_private_info_t *)__kmp_allocate(disp_size); 4188 4189 if (__kmp_storage_map) { 4190 __kmp_print_storage_map_gtid( 4191 gtid, &dispatch->th_disp_buffer[0], 4192 &dispatch->th_disp_buffer[team->t.t_max_nproc == 1 4193 ? 1 4194 : __kmp_dispatch_num_buffers], 4195 disp_size, "th_%d.th_dispatch.th_disp_buffer " 4196 "(team_%d.t_dispatch[%d].th_disp_buffer)", 4197 gtid, team->t.t_id, gtid); 4198 } 4199 } else { 4200 memset(&dispatch->th_disp_buffer[0], '\0', disp_size); 4201 } 4202 4203 dispatch->th_dispatch_pr_current = 0; 4204 dispatch->th_dispatch_sh_current = 0; 4205 4206 dispatch->th_deo_fcn = 0; /* ORDERED */ 4207 dispatch->th_dxo_fcn = 0; /* END ORDERED */ 4208 } 4209 4210 this_thr->th.th_next_pool = NULL; 4211 4212 if (!this_thr->th.th_task_state_memo_stack) { 4213 size_t i; 4214 this_thr->th.th_task_state_memo_stack = 4215 (kmp_uint8 *)__kmp_allocate(4 * sizeof(kmp_uint8)); 4216 this_thr->th.th_task_state_top = 0; 4217 this_thr->th.th_task_state_stack_sz = 4; 4218 for (i = 0; i < this_thr->th.th_task_state_stack_sz; 4219 ++i) // zero init the stack 4220 this_thr->th.th_task_state_memo_stack[i] = 0; 4221 } 4222 4223 KMP_DEBUG_ASSERT(!this_thr->th.th_spin_here); 4224 KMP_DEBUG_ASSERT(this_thr->th.th_next_waiting == 0); 4225 4226 KMP_MB(); 4227 } 4228 4229 /* allocate a new thread for the requesting team. this is only called from 4230 within a forkjoin critical section. we will first try to get an available 4231 thread from the thread pool. if none is available, we will fork a new one 4232 assuming we are able to create a new one. this should be assured, as the 4233 caller should check on this first. */ 4234 kmp_info_t *__kmp_allocate_thread(kmp_root_t *root, kmp_team_t *team, 4235 int new_tid) { 4236 kmp_team_t *serial_team; 4237 kmp_info_t *new_thr; 4238 int new_gtid; 4239 4240 KA_TRACE(20, ("__kmp_allocate_thread: T#%d\n", __kmp_get_gtid())); 4241 KMP_DEBUG_ASSERT(root && team); 4242 #if !KMP_NESTED_HOT_TEAMS 4243 KMP_DEBUG_ASSERT(KMP_MASTER_GTID(__kmp_get_gtid())); 4244 #endif 4245 KMP_MB(); 4246 4247 /* first, try to get one from the thread pool */ 4248 if (__kmp_thread_pool) { 4249 new_thr = CCAST(kmp_info_t *, __kmp_thread_pool); 4250 __kmp_thread_pool = (volatile kmp_info_t *)new_thr->th.th_next_pool; 4251 if (new_thr == __kmp_thread_pool_insert_pt) { 4252 __kmp_thread_pool_insert_pt = NULL; 4253 } 4254 TCW_4(new_thr->th.th_in_pool, FALSE); 4255 __kmp_suspend_initialize_thread(new_thr); 4256 __kmp_lock_suspend_mx(new_thr); 4257 if (new_thr->th.th_active_in_pool == TRUE) { 4258 KMP_DEBUG_ASSERT(new_thr->th.th_active == TRUE); 4259 KMP_ATOMIC_DEC(&__kmp_thread_pool_active_nth); 4260 new_thr->th.th_active_in_pool = FALSE; 4261 } 4262 __kmp_unlock_suspend_mx(new_thr); 4263 4264 KA_TRACE(20, ("__kmp_allocate_thread: T#%d using thread T#%d\n", 4265 __kmp_get_gtid(), new_thr->th.th_info.ds.ds_gtid)); 4266 KMP_ASSERT(!new_thr->th.th_team); 4267 KMP_DEBUG_ASSERT(__kmp_nth < __kmp_threads_capacity); 4268 4269 /* setup the thread structure */ 4270 __kmp_initialize_info(new_thr, team, new_tid, 4271 new_thr->th.th_info.ds.ds_gtid); 4272 KMP_DEBUG_ASSERT(new_thr->th.th_serial_team); 4273 4274 TCW_4(__kmp_nth, __kmp_nth + 1); 4275 4276 new_thr->th.th_task_state = 0; 4277 new_thr->th.th_task_state_top = 0; 4278 new_thr->th.th_task_state_stack_sz = 4; 4279 4280 #ifdef KMP_ADJUST_BLOCKTIME 4281 /* Adjust blocktime back to zero if necessary */ 4282 /* Middle initialization might not have occurred yet */ 4283 if (!__kmp_env_blocktime && (__kmp_avail_proc > 0)) { 4284 if (__kmp_nth > __kmp_avail_proc) { 4285 __kmp_zero_bt = TRUE; 4286 } 4287 } 4288 #endif /* KMP_ADJUST_BLOCKTIME */ 4289 4290 #if KMP_DEBUG 4291 // If thread entered pool via __kmp_free_thread, wait_flag should != 4292 // KMP_BARRIER_PARENT_FLAG. 4293 int b; 4294 kmp_balign_t *balign = new_thr->th.th_bar; 4295 for (b = 0; b < bs_last_barrier; ++b) 4296 KMP_DEBUG_ASSERT(balign[b].bb.wait_flag != KMP_BARRIER_PARENT_FLAG); 4297 #endif 4298 4299 KF_TRACE(10, ("__kmp_allocate_thread: T#%d using thread %p T#%d\n", 4300 __kmp_get_gtid(), new_thr, new_thr->th.th_info.ds.ds_gtid)); 4301 4302 KMP_MB(); 4303 return new_thr; 4304 } 4305 4306 /* no, well fork a new one */ 4307 KMP_ASSERT(__kmp_nth == __kmp_all_nth); 4308 KMP_ASSERT(__kmp_all_nth < __kmp_threads_capacity); 4309 4310 #if KMP_USE_MONITOR 4311 // If this is the first worker thread the RTL is creating, then also 4312 // launch the monitor thread. We try to do this as early as possible. 4313 if (!TCR_4(__kmp_init_monitor)) { 4314 __kmp_acquire_bootstrap_lock(&__kmp_monitor_lock); 4315 if (!TCR_4(__kmp_init_monitor)) { 4316 KF_TRACE(10, ("before __kmp_create_monitor\n")); 4317 TCW_4(__kmp_init_monitor, 1); 4318 __kmp_create_monitor(&__kmp_monitor); 4319 KF_TRACE(10, ("after __kmp_create_monitor\n")); 4320 #if KMP_OS_WINDOWS 4321 // AC: wait until monitor has started. This is a fix for CQ232808. 4322 // The reason is that if the library is loaded/unloaded in a loop with 4323 // small (parallel) work in between, then there is high probability that 4324 // monitor thread started after the library shutdown. At shutdown it is 4325 // too late to cope with the problem, because when the master is in 4326 // DllMain (process detach) the monitor has no chances to start (it is 4327 // blocked), and master has no means to inform the monitor that the 4328 // library has gone, because all the memory which the monitor can access 4329 // is going to be released/reset. 4330 while (TCR_4(__kmp_init_monitor) < 2) { 4331 KMP_YIELD(TRUE); 4332 } 4333 KF_TRACE(10, ("after monitor thread has started\n")); 4334 #endif 4335 } 4336 __kmp_release_bootstrap_lock(&__kmp_monitor_lock); 4337 } 4338 #endif 4339 4340 KMP_MB(); 4341 4342 { 4343 int new_start_gtid = TCR_4(__kmp_init_hidden_helper_threads) 4344 ? 1 4345 : __kmp_hidden_helper_threads_num + 1; 4346 4347 for (new_gtid = new_start_gtid; TCR_PTR(__kmp_threads[new_gtid]) != NULL; 4348 ++new_gtid) { 4349 KMP_DEBUG_ASSERT(new_gtid < __kmp_threads_capacity); 4350 } 4351 4352 if (TCR_4(__kmp_init_hidden_helper_threads)) { 4353 KMP_DEBUG_ASSERT(new_gtid <= __kmp_hidden_helper_threads_num); 4354 } 4355 } 4356 4357 /* allocate space for it. */ 4358 new_thr = (kmp_info_t *)__kmp_allocate(sizeof(kmp_info_t)); 4359 4360 TCW_SYNC_PTR(__kmp_threads[new_gtid], new_thr); 4361 4362 #if USE_ITT_BUILD && USE_ITT_NOTIFY && KMP_DEBUG 4363 // suppress race conditions detection on synchronization flags in debug mode 4364 // this helps to analyze library internals eliminating false positives 4365 __itt_suppress_mark_range( 4366 __itt_suppress_range, __itt_suppress_threading_errors, 4367 &new_thr->th.th_sleep_loc, sizeof(new_thr->th.th_sleep_loc)); 4368 __itt_suppress_mark_range( 4369 __itt_suppress_range, __itt_suppress_threading_errors, 4370 &new_thr->th.th_reap_state, sizeof(new_thr->th.th_reap_state)); 4371 #if KMP_OS_WINDOWS 4372 __itt_suppress_mark_range( 4373 __itt_suppress_range, __itt_suppress_threading_errors, 4374 &new_thr->th.th_suspend_init, sizeof(new_thr->th.th_suspend_init)); 4375 #else 4376 __itt_suppress_mark_range(__itt_suppress_range, 4377 __itt_suppress_threading_errors, 4378 &new_thr->th.th_suspend_init_count, 4379 sizeof(new_thr->th.th_suspend_init_count)); 4380 #endif 4381 // TODO: check if we need to also suppress b_arrived flags 4382 __itt_suppress_mark_range(__itt_suppress_range, 4383 __itt_suppress_threading_errors, 4384 CCAST(kmp_uint64 *, &new_thr->th.th_bar[0].bb.b_go), 4385 sizeof(new_thr->th.th_bar[0].bb.b_go)); 4386 __itt_suppress_mark_range(__itt_suppress_range, 4387 __itt_suppress_threading_errors, 4388 CCAST(kmp_uint64 *, &new_thr->th.th_bar[1].bb.b_go), 4389 sizeof(new_thr->th.th_bar[1].bb.b_go)); 4390 __itt_suppress_mark_range(__itt_suppress_range, 4391 __itt_suppress_threading_errors, 4392 CCAST(kmp_uint64 *, &new_thr->th.th_bar[2].bb.b_go), 4393 sizeof(new_thr->th.th_bar[2].bb.b_go)); 4394 #endif /* USE_ITT_BUILD && USE_ITT_NOTIFY && KMP_DEBUG */ 4395 if (__kmp_storage_map) { 4396 __kmp_print_thread_storage_map(new_thr, new_gtid); 4397 } 4398 4399 // add the reserve serialized team, initialized from the team's master thread 4400 { 4401 kmp_internal_control_t r_icvs = __kmp_get_x_global_icvs(team); 4402 KF_TRACE(10, ("__kmp_allocate_thread: before th_serial/serial_team\n")); 4403 new_thr->th.th_serial_team = serial_team = 4404 (kmp_team_t *)__kmp_allocate_team(root, 1, 1, 4405 #if OMPT_SUPPORT 4406 ompt_data_none, // root parallel id 4407 #endif 4408 proc_bind_default, &r_icvs, 4409 0 USE_NESTED_HOT_ARG(NULL)); 4410 } 4411 KMP_ASSERT(serial_team); 4412 serial_team->t.t_serialized = 0; // AC: the team created in reserve, not for 4413 // execution (it is unused for now). 4414 serial_team->t.t_threads[0] = new_thr; 4415 KF_TRACE(10, 4416 ("__kmp_allocate_thread: after th_serial/serial_team : new_thr=%p\n", 4417 new_thr)); 4418 4419 /* setup the thread structures */ 4420 __kmp_initialize_info(new_thr, team, new_tid, new_gtid); 4421 4422 #if USE_FAST_MEMORY 4423 __kmp_initialize_fast_memory(new_thr); 4424 #endif /* USE_FAST_MEMORY */ 4425 4426 #if KMP_USE_BGET 4427 KMP_DEBUG_ASSERT(new_thr->th.th_local.bget_data == NULL); 4428 __kmp_initialize_bget(new_thr); 4429 #endif 4430 4431 __kmp_init_random(new_thr); // Initialize random number generator 4432 4433 /* Initialize these only once when thread is grabbed for a team allocation */ 4434 KA_TRACE(20, 4435 ("__kmp_allocate_thread: T#%d init go fork=%u, plain=%u\n", 4436 __kmp_get_gtid(), KMP_INIT_BARRIER_STATE, KMP_INIT_BARRIER_STATE)); 4437 4438 int b; 4439 kmp_balign_t *balign = new_thr->th.th_bar; 4440 for (b = 0; b < bs_last_barrier; ++b) { 4441 balign[b].bb.b_go = KMP_INIT_BARRIER_STATE; 4442 balign[b].bb.team = NULL; 4443 balign[b].bb.wait_flag = KMP_BARRIER_NOT_WAITING; 4444 balign[b].bb.use_oncore_barrier = 0; 4445 } 4446 4447 new_thr->th.th_spin_here = FALSE; 4448 new_thr->th.th_next_waiting = 0; 4449 #if KMP_OS_UNIX 4450 new_thr->th.th_blocking = false; 4451 #endif 4452 4453 #if KMP_AFFINITY_SUPPORTED 4454 new_thr->th.th_current_place = KMP_PLACE_UNDEFINED; 4455 new_thr->th.th_new_place = KMP_PLACE_UNDEFINED; 4456 new_thr->th.th_first_place = KMP_PLACE_UNDEFINED; 4457 new_thr->th.th_last_place = KMP_PLACE_UNDEFINED; 4458 #endif 4459 new_thr->th.th_def_allocator = __kmp_def_allocator; 4460 new_thr->th.th_prev_level = 0; 4461 new_thr->th.th_prev_num_threads = 1; 4462 4463 TCW_4(new_thr->th.th_in_pool, FALSE); 4464 new_thr->th.th_active_in_pool = FALSE; 4465 TCW_4(new_thr->th.th_active, TRUE); 4466 4467 /* adjust the global counters */ 4468 __kmp_all_nth++; 4469 __kmp_nth++; 4470 4471 // if __kmp_adjust_gtid_mode is set, then we use method #1 (sp search) for low 4472 // numbers of procs, and method #2 (keyed API call) for higher numbers. 4473 if (__kmp_adjust_gtid_mode) { 4474 if (__kmp_all_nth >= __kmp_tls_gtid_min) { 4475 if (TCR_4(__kmp_gtid_mode) != 2) { 4476 TCW_4(__kmp_gtid_mode, 2); 4477 } 4478 } else { 4479 if (TCR_4(__kmp_gtid_mode) != 1) { 4480 TCW_4(__kmp_gtid_mode, 1); 4481 } 4482 } 4483 } 4484 4485 #ifdef KMP_ADJUST_BLOCKTIME 4486 /* Adjust blocktime back to zero if necessary */ 4487 /* Middle initialization might not have occurred yet */ 4488 if (!__kmp_env_blocktime && (__kmp_avail_proc > 0)) { 4489 if (__kmp_nth > __kmp_avail_proc) { 4490 __kmp_zero_bt = TRUE; 4491 } 4492 } 4493 #endif /* KMP_ADJUST_BLOCKTIME */ 4494 4495 /* actually fork it and create the new worker thread */ 4496 KF_TRACE( 4497 10, ("__kmp_allocate_thread: before __kmp_create_worker: %p\n", new_thr)); 4498 __kmp_create_worker(new_gtid, new_thr, __kmp_stksize); 4499 KF_TRACE(10, 4500 ("__kmp_allocate_thread: after __kmp_create_worker: %p\n", new_thr)); 4501 4502 KA_TRACE(20, ("__kmp_allocate_thread: T#%d forked T#%d\n", __kmp_get_gtid(), 4503 new_gtid)); 4504 KMP_MB(); 4505 return new_thr; 4506 } 4507 4508 /* Reinitialize team for reuse. 4509 The hot team code calls this case at every fork barrier, so EPCC barrier 4510 test are extremely sensitive to changes in it, esp. writes to the team 4511 struct, which cause a cache invalidation in all threads. 4512 IF YOU TOUCH THIS ROUTINE, RUN EPCC C SYNCBENCH ON A BIG-IRON MACHINE!!! */ 4513 static void __kmp_reinitialize_team(kmp_team_t *team, 4514 kmp_internal_control_t *new_icvs, 4515 ident_t *loc) { 4516 KF_TRACE(10, ("__kmp_reinitialize_team: enter this_thread=%p team=%p\n", 4517 team->t.t_threads[0], team)); 4518 KMP_DEBUG_ASSERT(team && new_icvs); 4519 KMP_DEBUG_ASSERT((!TCR_4(__kmp_init_parallel)) || new_icvs->nproc); 4520 KMP_CHECK_UPDATE(team->t.t_ident, loc); 4521 4522 KMP_CHECK_UPDATE(team->t.t_id, KMP_GEN_TEAM_ID()); 4523 // Copy ICVs to the master thread's implicit taskdata 4524 __kmp_init_implicit_task(loc, team->t.t_threads[0], team, 0, FALSE); 4525 copy_icvs(&team->t.t_implicit_task_taskdata[0].td_icvs, new_icvs); 4526 4527 KF_TRACE(10, ("__kmp_reinitialize_team: exit this_thread=%p team=%p\n", 4528 team->t.t_threads[0], team)); 4529 } 4530 4531 /* Initialize the team data structure. 4532 This assumes the t_threads and t_max_nproc are already set. 4533 Also, we don't touch the arguments */ 4534 static void __kmp_initialize_team(kmp_team_t *team, int new_nproc, 4535 kmp_internal_control_t *new_icvs, 4536 ident_t *loc) { 4537 KF_TRACE(10, ("__kmp_initialize_team: enter: team=%p\n", team)); 4538 4539 /* verify */ 4540 KMP_DEBUG_ASSERT(team); 4541 KMP_DEBUG_ASSERT(new_nproc <= team->t.t_max_nproc); 4542 KMP_DEBUG_ASSERT(team->t.t_threads); 4543 KMP_MB(); 4544 4545 team->t.t_master_tid = 0; /* not needed */ 4546 /* team->t.t_master_bar; not needed */ 4547 team->t.t_serialized = new_nproc > 1 ? 0 : 1; 4548 team->t.t_nproc = new_nproc; 4549 4550 /* team->t.t_parent = NULL; TODO not needed & would mess up hot team */ 4551 team->t.t_next_pool = NULL; 4552 /* memset( team->t.t_threads, 0, sizeof(kmp_info_t*)*new_nproc ); would mess 4553 * up hot team */ 4554 4555 TCW_SYNC_PTR(team->t.t_pkfn, NULL); /* not needed */ 4556 team->t.t_invoke = NULL; /* not needed */ 4557 4558 // TODO???: team->t.t_max_active_levels = new_max_active_levels; 4559 team->t.t_sched.sched = new_icvs->sched.sched; 4560 4561 #if KMP_ARCH_X86 || KMP_ARCH_X86_64 4562 team->t.t_fp_control_saved = FALSE; /* not needed */ 4563 team->t.t_x87_fpu_control_word = 0; /* not needed */ 4564 team->t.t_mxcsr = 0; /* not needed */ 4565 #endif /* KMP_ARCH_X86 || KMP_ARCH_X86_64 */ 4566 4567 team->t.t_construct = 0; 4568 4569 team->t.t_ordered.dt.t_value = 0; 4570 team->t.t_master_active = FALSE; 4571 4572 #ifdef KMP_DEBUG 4573 team->t.t_copypriv_data = NULL; /* not necessary, but nice for debugging */ 4574 #endif 4575 #if KMP_OS_WINDOWS 4576 team->t.t_copyin_counter = 0; /* for barrier-free copyin implementation */ 4577 #endif 4578 4579 team->t.t_control_stack_top = NULL; 4580 4581 __kmp_reinitialize_team(team, new_icvs, loc); 4582 4583 KMP_MB(); 4584 KF_TRACE(10, ("__kmp_initialize_team: exit: team=%p\n", team)); 4585 } 4586 4587 #if (KMP_OS_LINUX || KMP_OS_FREEBSD) && KMP_AFFINITY_SUPPORTED 4588 /* Sets full mask for thread and returns old mask, no changes to structures. */ 4589 static void 4590 __kmp_set_thread_affinity_mask_full_tmp(kmp_affin_mask_t *old_mask) { 4591 if (KMP_AFFINITY_CAPABLE()) { 4592 int status; 4593 if (old_mask != NULL) { 4594 status = __kmp_get_system_affinity(old_mask, TRUE); 4595 int error = errno; 4596 if (status != 0) { 4597 __kmp_fatal(KMP_MSG(ChangeThreadAffMaskError), KMP_ERR(error), 4598 __kmp_msg_null); 4599 } 4600 } 4601 __kmp_set_system_affinity(__kmp_affin_fullMask, TRUE); 4602 } 4603 } 4604 #endif 4605 4606 #if KMP_AFFINITY_SUPPORTED 4607 4608 // __kmp_partition_places() is the heart of the OpenMP 4.0 affinity mechanism. 4609 // It calculates the worker + master thread's partition based upon the parent 4610 // thread's partition, and binds each worker to a thread in their partition. 4611 // The master thread's partition should already include its current binding. 4612 static void __kmp_partition_places(kmp_team_t *team, int update_master_only) { 4613 // Copy the master thread's place partition to the team struct 4614 kmp_info_t *master_th = team->t.t_threads[0]; 4615 KMP_DEBUG_ASSERT(master_th != NULL); 4616 kmp_proc_bind_t proc_bind = team->t.t_proc_bind; 4617 int first_place = master_th->th.th_first_place; 4618 int last_place = master_th->th.th_last_place; 4619 int masters_place = master_th->th.th_current_place; 4620 team->t.t_first_place = first_place; 4621 team->t.t_last_place = last_place; 4622 4623 KA_TRACE(20, ("__kmp_partition_places: enter: proc_bind = %d T#%d(%d:0) " 4624 "bound to place %d partition = [%d,%d]\n", 4625 proc_bind, __kmp_gtid_from_thread(team->t.t_threads[0]), 4626 team->t.t_id, masters_place, first_place, last_place)); 4627 4628 switch (proc_bind) { 4629 4630 case proc_bind_default: 4631 // serial teams might have the proc_bind policy set to proc_bind_default. It 4632 // doesn't matter, as we don't rebind master thread for any proc_bind policy 4633 KMP_DEBUG_ASSERT(team->t.t_nproc == 1); 4634 break; 4635 4636 case proc_bind_master: { 4637 int f; 4638 int n_th = team->t.t_nproc; 4639 for (f = 1; f < n_th; f++) { 4640 kmp_info_t *th = team->t.t_threads[f]; 4641 KMP_DEBUG_ASSERT(th != NULL); 4642 th->th.th_first_place = first_place; 4643 th->th.th_last_place = last_place; 4644 th->th.th_new_place = masters_place; 4645 if (__kmp_display_affinity && masters_place != th->th.th_current_place && 4646 team->t.t_display_affinity != 1) { 4647 team->t.t_display_affinity = 1; 4648 } 4649 4650 KA_TRACE(100, ("__kmp_partition_places: master: T#%d(%d:%d) place %d " 4651 "partition = [%d,%d]\n", 4652 __kmp_gtid_from_thread(team->t.t_threads[f]), team->t.t_id, 4653 f, masters_place, first_place, last_place)); 4654 } 4655 } break; 4656 4657 case proc_bind_close: { 4658 int f; 4659 int n_th = team->t.t_nproc; 4660 int n_places; 4661 if (first_place <= last_place) { 4662 n_places = last_place - first_place + 1; 4663 } else { 4664 n_places = __kmp_affinity_num_masks - first_place + last_place + 1; 4665 } 4666 if (n_th <= n_places) { 4667 int place = masters_place; 4668 for (f = 1; f < n_th; f++) { 4669 kmp_info_t *th = team->t.t_threads[f]; 4670 KMP_DEBUG_ASSERT(th != NULL); 4671 4672 if (place == last_place) { 4673 place = first_place; 4674 } else if (place == (int)(__kmp_affinity_num_masks - 1)) { 4675 place = 0; 4676 } else { 4677 place++; 4678 } 4679 th->th.th_first_place = first_place; 4680 th->th.th_last_place = last_place; 4681 th->th.th_new_place = place; 4682 if (__kmp_display_affinity && place != th->th.th_current_place && 4683 team->t.t_display_affinity != 1) { 4684 team->t.t_display_affinity = 1; 4685 } 4686 4687 KA_TRACE(100, ("__kmp_partition_places: close: T#%d(%d:%d) place %d " 4688 "partition = [%d,%d]\n", 4689 __kmp_gtid_from_thread(team->t.t_threads[f]), 4690 team->t.t_id, f, place, first_place, last_place)); 4691 } 4692 } else { 4693 int S, rem, gap, s_count; 4694 S = n_th / n_places; 4695 s_count = 0; 4696 rem = n_th - (S * n_places); 4697 gap = rem > 0 ? n_places / rem : n_places; 4698 int place = masters_place; 4699 int gap_ct = gap; 4700 for (f = 0; f < n_th; f++) { 4701 kmp_info_t *th = team->t.t_threads[f]; 4702 KMP_DEBUG_ASSERT(th != NULL); 4703 4704 th->th.th_first_place = first_place; 4705 th->th.th_last_place = last_place; 4706 th->th.th_new_place = place; 4707 if (__kmp_display_affinity && place != th->th.th_current_place && 4708 team->t.t_display_affinity != 1) { 4709 team->t.t_display_affinity = 1; 4710 } 4711 s_count++; 4712 4713 if ((s_count == S) && rem && (gap_ct == gap)) { 4714 // do nothing, add an extra thread to place on next iteration 4715 } else if ((s_count == S + 1) && rem && (gap_ct == gap)) { 4716 // we added an extra thread to this place; move to next place 4717 if (place == last_place) { 4718 place = first_place; 4719 } else if (place == (int)(__kmp_affinity_num_masks - 1)) { 4720 place = 0; 4721 } else { 4722 place++; 4723 } 4724 s_count = 0; 4725 gap_ct = 1; 4726 rem--; 4727 } else if (s_count == S) { // place full; don't add extra 4728 if (place == last_place) { 4729 place = first_place; 4730 } else if (place == (int)(__kmp_affinity_num_masks - 1)) { 4731 place = 0; 4732 } else { 4733 place++; 4734 } 4735 gap_ct++; 4736 s_count = 0; 4737 } 4738 4739 KA_TRACE(100, 4740 ("__kmp_partition_places: close: T#%d(%d:%d) place %d " 4741 "partition = [%d,%d]\n", 4742 __kmp_gtid_from_thread(team->t.t_threads[f]), team->t.t_id, f, 4743 th->th.th_new_place, first_place, last_place)); 4744 } 4745 KMP_DEBUG_ASSERT(place == masters_place); 4746 } 4747 } break; 4748 4749 case proc_bind_spread: { 4750 int f; 4751 int n_th = team->t.t_nproc; 4752 int n_places; 4753 int thidx; 4754 if (first_place <= last_place) { 4755 n_places = last_place - first_place + 1; 4756 } else { 4757 n_places = __kmp_affinity_num_masks - first_place + last_place + 1; 4758 } 4759 if (n_th <= n_places) { 4760 int place = -1; 4761 4762 if (n_places != static_cast<int>(__kmp_affinity_num_masks)) { 4763 int S = n_places / n_th; 4764 int s_count, rem, gap, gap_ct; 4765 4766 place = masters_place; 4767 rem = n_places - n_th * S; 4768 gap = rem ? n_th / rem : 1; 4769 gap_ct = gap; 4770 thidx = n_th; 4771 if (update_master_only == 1) 4772 thidx = 1; 4773 for (f = 0; f < thidx; f++) { 4774 kmp_info_t *th = team->t.t_threads[f]; 4775 KMP_DEBUG_ASSERT(th != NULL); 4776 4777 th->th.th_first_place = place; 4778 th->th.th_new_place = place; 4779 if (__kmp_display_affinity && place != th->th.th_current_place && 4780 team->t.t_display_affinity != 1) { 4781 team->t.t_display_affinity = 1; 4782 } 4783 s_count = 1; 4784 while (s_count < S) { 4785 if (place == last_place) { 4786 place = first_place; 4787 } else if (place == (int)(__kmp_affinity_num_masks - 1)) { 4788 place = 0; 4789 } else { 4790 place++; 4791 } 4792 s_count++; 4793 } 4794 if (rem && (gap_ct == gap)) { 4795 if (place == last_place) { 4796 place = first_place; 4797 } else if (place == (int)(__kmp_affinity_num_masks - 1)) { 4798 place = 0; 4799 } else { 4800 place++; 4801 } 4802 rem--; 4803 gap_ct = 0; 4804 } 4805 th->th.th_last_place = place; 4806 gap_ct++; 4807 4808 if (place == last_place) { 4809 place = first_place; 4810 } else if (place == (int)(__kmp_affinity_num_masks - 1)) { 4811 place = 0; 4812 } else { 4813 place++; 4814 } 4815 4816 KA_TRACE(100, 4817 ("__kmp_partition_places: spread: T#%d(%d:%d) place %d " 4818 "partition = [%d,%d], __kmp_affinity_num_masks: %u\n", 4819 __kmp_gtid_from_thread(team->t.t_threads[f]), team->t.t_id, 4820 f, th->th.th_new_place, th->th.th_first_place, 4821 th->th.th_last_place, __kmp_affinity_num_masks)); 4822 } 4823 } else { 4824 /* Having uniform space of available computation places I can create 4825 T partitions of round(P/T) size and put threads into the first 4826 place of each partition. */ 4827 double current = static_cast<double>(masters_place); 4828 double spacing = 4829 (static_cast<double>(n_places + 1) / static_cast<double>(n_th)); 4830 int first, last; 4831 kmp_info_t *th; 4832 4833 thidx = n_th + 1; 4834 if (update_master_only == 1) 4835 thidx = 1; 4836 for (f = 0; f < thidx; f++) { 4837 first = static_cast<int>(current); 4838 last = static_cast<int>(current + spacing) - 1; 4839 KMP_DEBUG_ASSERT(last >= first); 4840 if (first >= n_places) { 4841 if (masters_place) { 4842 first -= n_places; 4843 last -= n_places; 4844 if (first == (masters_place + 1)) { 4845 KMP_DEBUG_ASSERT(f == n_th); 4846 first--; 4847 } 4848 if (last == masters_place) { 4849 KMP_DEBUG_ASSERT(f == (n_th - 1)); 4850 last--; 4851 } 4852 } else { 4853 KMP_DEBUG_ASSERT(f == n_th); 4854 first = 0; 4855 last = 0; 4856 } 4857 } 4858 if (last >= n_places) { 4859 last = (n_places - 1); 4860 } 4861 place = first; 4862 current += spacing; 4863 if (f < n_th) { 4864 KMP_DEBUG_ASSERT(0 <= first); 4865 KMP_DEBUG_ASSERT(n_places > first); 4866 KMP_DEBUG_ASSERT(0 <= last); 4867 KMP_DEBUG_ASSERT(n_places > last); 4868 KMP_DEBUG_ASSERT(last_place >= first_place); 4869 th = team->t.t_threads[f]; 4870 KMP_DEBUG_ASSERT(th); 4871 th->th.th_first_place = first; 4872 th->th.th_new_place = place; 4873 th->th.th_last_place = last; 4874 if (__kmp_display_affinity && place != th->th.th_current_place && 4875 team->t.t_display_affinity != 1) { 4876 team->t.t_display_affinity = 1; 4877 } 4878 KA_TRACE(100, 4879 ("__kmp_partition_places: spread: T#%d(%d:%d) place %d " 4880 "partition = [%d,%d], spacing = %.4f\n", 4881 __kmp_gtid_from_thread(team->t.t_threads[f]), 4882 team->t.t_id, f, th->th.th_new_place, 4883 th->th.th_first_place, th->th.th_last_place, spacing)); 4884 } 4885 } 4886 } 4887 KMP_DEBUG_ASSERT(update_master_only || place == masters_place); 4888 } else { 4889 int S, rem, gap, s_count; 4890 S = n_th / n_places; 4891 s_count = 0; 4892 rem = n_th - (S * n_places); 4893 gap = rem > 0 ? n_places / rem : n_places; 4894 int place = masters_place; 4895 int gap_ct = gap; 4896 thidx = n_th; 4897 if (update_master_only == 1) 4898 thidx = 1; 4899 for (f = 0; f < thidx; f++) { 4900 kmp_info_t *th = team->t.t_threads[f]; 4901 KMP_DEBUG_ASSERT(th != NULL); 4902 4903 th->th.th_first_place = place; 4904 th->th.th_last_place = place; 4905 th->th.th_new_place = place; 4906 if (__kmp_display_affinity && place != th->th.th_current_place && 4907 team->t.t_display_affinity != 1) { 4908 team->t.t_display_affinity = 1; 4909 } 4910 s_count++; 4911 4912 if ((s_count == S) && rem && (gap_ct == gap)) { 4913 // do nothing, add an extra thread to place on next iteration 4914 } else if ((s_count == S + 1) && rem && (gap_ct == gap)) { 4915 // we added an extra thread to this place; move on to next place 4916 if (place == last_place) { 4917 place = first_place; 4918 } else if (place == (int)(__kmp_affinity_num_masks - 1)) { 4919 place = 0; 4920 } else { 4921 place++; 4922 } 4923 s_count = 0; 4924 gap_ct = 1; 4925 rem--; 4926 } else if (s_count == S) { // place is full; don't add extra thread 4927 if (place == last_place) { 4928 place = first_place; 4929 } else if (place == (int)(__kmp_affinity_num_masks - 1)) { 4930 place = 0; 4931 } else { 4932 place++; 4933 } 4934 gap_ct++; 4935 s_count = 0; 4936 } 4937 4938 KA_TRACE(100, ("__kmp_partition_places: spread: T#%d(%d:%d) place %d " 4939 "partition = [%d,%d]\n", 4940 __kmp_gtid_from_thread(team->t.t_threads[f]), 4941 team->t.t_id, f, th->th.th_new_place, 4942 th->th.th_first_place, th->th.th_last_place)); 4943 } 4944 KMP_DEBUG_ASSERT(update_master_only || place == masters_place); 4945 } 4946 } break; 4947 4948 default: 4949 break; 4950 } 4951 4952 KA_TRACE(20, ("__kmp_partition_places: exit T#%d\n", team->t.t_id)); 4953 } 4954 4955 #endif // KMP_AFFINITY_SUPPORTED 4956 4957 /* allocate a new team data structure to use. take one off of the free pool if 4958 available */ 4959 kmp_team_t * 4960 __kmp_allocate_team(kmp_root_t *root, int new_nproc, int max_nproc, 4961 #if OMPT_SUPPORT 4962 ompt_data_t ompt_parallel_data, 4963 #endif 4964 kmp_proc_bind_t new_proc_bind, 4965 kmp_internal_control_t *new_icvs, 4966 int argc USE_NESTED_HOT_ARG(kmp_info_t *master)) { 4967 KMP_TIME_DEVELOPER_PARTITIONED_BLOCK(KMP_allocate_team); 4968 int f; 4969 kmp_team_t *team; 4970 int use_hot_team = !root->r.r_active; 4971 int level = 0; 4972 4973 KA_TRACE(20, ("__kmp_allocate_team: called\n")); 4974 KMP_DEBUG_ASSERT(new_nproc >= 1 && argc >= 0); 4975 KMP_DEBUG_ASSERT(max_nproc >= new_nproc); 4976 KMP_MB(); 4977 4978 #if KMP_NESTED_HOT_TEAMS 4979 kmp_hot_team_ptr_t *hot_teams; 4980 if (master) { 4981 team = master->th.th_team; 4982 level = team->t.t_active_level; 4983 if (master->th.th_teams_microtask) { // in teams construct? 4984 if (master->th.th_teams_size.nteams > 1 && 4985 ( // #teams > 1 4986 team->t.t_pkfn == 4987 (microtask_t)__kmp_teams_master || // inner fork of the teams 4988 master->th.th_teams_level < 4989 team->t.t_level)) { // or nested parallel inside the teams 4990 ++level; // not increment if #teams==1, or for outer fork of the teams; 4991 // increment otherwise 4992 } 4993 } 4994 hot_teams = master->th.th_hot_teams; 4995 if (level < __kmp_hot_teams_max_level && hot_teams && 4996 hot_teams[level].hot_team) { 4997 // hot team has already been allocated for given level 4998 use_hot_team = 1; 4999 } else { 5000 use_hot_team = 0; 5001 } 5002 } else { 5003 // check we won't access uninitialized hot_teams, just in case 5004 KMP_DEBUG_ASSERT(new_nproc == 1); 5005 } 5006 #endif 5007 // Optimization to use a "hot" team 5008 if (use_hot_team && new_nproc > 1) { 5009 KMP_DEBUG_ASSERT(new_nproc <= max_nproc); 5010 #if KMP_NESTED_HOT_TEAMS 5011 team = hot_teams[level].hot_team; 5012 #else 5013 team = root->r.r_hot_team; 5014 #endif 5015 #if KMP_DEBUG 5016 if (__kmp_tasking_mode != tskm_immediate_exec) { 5017 KA_TRACE(20, ("__kmp_allocate_team: hot team task_team[0] = %p " 5018 "task_team[1] = %p before reinit\n", 5019 team->t.t_task_team[0], team->t.t_task_team[1])); 5020 } 5021 #endif 5022 5023 // Has the number of threads changed? 5024 /* Let's assume the most common case is that the number of threads is 5025 unchanged, and put that case first. */ 5026 if (team->t.t_nproc == new_nproc) { // Check changes in number of threads 5027 KA_TRACE(20, ("__kmp_allocate_team: reusing hot team\n")); 5028 // This case can mean that omp_set_num_threads() was called and the hot 5029 // team size was already reduced, so we check the special flag 5030 if (team->t.t_size_changed == -1) { 5031 team->t.t_size_changed = 1; 5032 } else { 5033 KMP_CHECK_UPDATE(team->t.t_size_changed, 0); 5034 } 5035 5036 // TODO???: team->t.t_max_active_levels = new_max_active_levels; 5037 kmp_r_sched_t new_sched = new_icvs->sched; 5038 // set master's schedule as new run-time schedule 5039 KMP_CHECK_UPDATE(team->t.t_sched.sched, new_sched.sched); 5040 5041 __kmp_reinitialize_team(team, new_icvs, 5042 root->r.r_uber_thread->th.th_ident); 5043 5044 KF_TRACE(10, ("__kmp_allocate_team2: T#%d, this_thread=%p team=%p\n", 0, 5045 team->t.t_threads[0], team)); 5046 __kmp_push_current_task_to_thread(team->t.t_threads[0], team, 0); 5047 5048 #if KMP_AFFINITY_SUPPORTED 5049 if ((team->t.t_size_changed == 0) && 5050 (team->t.t_proc_bind == new_proc_bind)) { 5051 if (new_proc_bind == proc_bind_spread) { 5052 __kmp_partition_places( 5053 team, 1); // add flag to update only master for spread 5054 } 5055 KA_TRACE(200, ("__kmp_allocate_team: reusing hot team #%d bindings: " 5056 "proc_bind = %d, partition = [%d,%d]\n", 5057 team->t.t_id, new_proc_bind, team->t.t_first_place, 5058 team->t.t_last_place)); 5059 } else { 5060 KMP_CHECK_UPDATE(team->t.t_proc_bind, new_proc_bind); 5061 __kmp_partition_places(team); 5062 } 5063 #else 5064 KMP_CHECK_UPDATE(team->t.t_proc_bind, new_proc_bind); 5065 #endif /* KMP_AFFINITY_SUPPORTED */ 5066 } else if (team->t.t_nproc > new_nproc) { 5067 KA_TRACE(20, 5068 ("__kmp_allocate_team: decreasing hot team thread count to %d\n", 5069 new_nproc)); 5070 5071 team->t.t_size_changed = 1; 5072 #if KMP_NESTED_HOT_TEAMS 5073 if (__kmp_hot_teams_mode == 0) { 5074 // AC: saved number of threads should correspond to team's value in this 5075 // mode, can be bigger in mode 1, when hot team has threads in reserve 5076 KMP_DEBUG_ASSERT(hot_teams[level].hot_team_nth == team->t.t_nproc); 5077 hot_teams[level].hot_team_nth = new_nproc; 5078 #endif // KMP_NESTED_HOT_TEAMS 5079 /* release the extra threads we don't need any more */ 5080 for (f = new_nproc; f < team->t.t_nproc; f++) { 5081 KMP_DEBUG_ASSERT(team->t.t_threads[f]); 5082 if (__kmp_tasking_mode != tskm_immediate_exec) { 5083 // When decreasing team size, threads no longer in the team should 5084 // unref task team. 5085 team->t.t_threads[f]->th.th_task_team = NULL; 5086 } 5087 __kmp_free_thread(team->t.t_threads[f]); 5088 team->t.t_threads[f] = NULL; 5089 } 5090 #if KMP_NESTED_HOT_TEAMS 5091 } // (__kmp_hot_teams_mode == 0) 5092 else { 5093 // When keeping extra threads in team, switch threads to wait on own 5094 // b_go flag 5095 for (f = new_nproc; f < team->t.t_nproc; ++f) { 5096 KMP_DEBUG_ASSERT(team->t.t_threads[f]); 5097 kmp_balign_t *balign = team->t.t_threads[f]->th.th_bar; 5098 for (int b = 0; b < bs_last_barrier; ++b) { 5099 if (balign[b].bb.wait_flag == KMP_BARRIER_PARENT_FLAG) { 5100 balign[b].bb.wait_flag = KMP_BARRIER_SWITCH_TO_OWN_FLAG; 5101 } 5102 KMP_CHECK_UPDATE(balign[b].bb.leaf_kids, 0); 5103 } 5104 } 5105 } 5106 #endif // KMP_NESTED_HOT_TEAMS 5107 team->t.t_nproc = new_nproc; 5108 // TODO???: team->t.t_max_active_levels = new_max_active_levels; 5109 KMP_CHECK_UPDATE(team->t.t_sched.sched, new_icvs->sched.sched); 5110 __kmp_reinitialize_team(team, new_icvs, 5111 root->r.r_uber_thread->th.th_ident); 5112 5113 // Update remaining threads 5114 for (f = 0; f < new_nproc; ++f) { 5115 team->t.t_threads[f]->th.th_team_nproc = new_nproc; 5116 } 5117 5118 // restore the current task state of the master thread: should be the 5119 // implicit task 5120 KF_TRACE(10, ("__kmp_allocate_team: T#%d, this_thread=%p team=%p\n", 0, 5121 team->t.t_threads[0], team)); 5122 5123 __kmp_push_current_task_to_thread(team->t.t_threads[0], team, 0); 5124 5125 #ifdef KMP_DEBUG 5126 for (f = 0; f < team->t.t_nproc; f++) { 5127 KMP_DEBUG_ASSERT(team->t.t_threads[f] && 5128 team->t.t_threads[f]->th.th_team_nproc == 5129 team->t.t_nproc); 5130 } 5131 #endif 5132 5133 KMP_CHECK_UPDATE(team->t.t_proc_bind, new_proc_bind); 5134 #if KMP_AFFINITY_SUPPORTED 5135 __kmp_partition_places(team); 5136 #endif 5137 } else { // team->t.t_nproc < new_nproc 5138 #if (KMP_OS_LINUX || KMP_OS_FREEBSD) && KMP_AFFINITY_SUPPORTED 5139 kmp_affin_mask_t *old_mask; 5140 if (KMP_AFFINITY_CAPABLE()) { 5141 KMP_CPU_ALLOC(old_mask); 5142 } 5143 #endif 5144 5145 KA_TRACE(20, 5146 ("__kmp_allocate_team: increasing hot team thread count to %d\n", 5147 new_nproc)); 5148 5149 team->t.t_size_changed = 1; 5150 5151 #if KMP_NESTED_HOT_TEAMS 5152 int avail_threads = hot_teams[level].hot_team_nth; 5153 if (new_nproc < avail_threads) 5154 avail_threads = new_nproc; 5155 kmp_info_t **other_threads = team->t.t_threads; 5156 for (f = team->t.t_nproc; f < avail_threads; ++f) { 5157 // Adjust barrier data of reserved threads (if any) of the team 5158 // Other data will be set in __kmp_initialize_info() below. 5159 int b; 5160 kmp_balign_t *balign = other_threads[f]->th.th_bar; 5161 for (b = 0; b < bs_last_barrier; ++b) { 5162 balign[b].bb.b_arrived = team->t.t_bar[b].b_arrived; 5163 KMP_DEBUG_ASSERT(balign[b].bb.wait_flag != KMP_BARRIER_PARENT_FLAG); 5164 #if USE_DEBUGGER 5165 balign[b].bb.b_worker_arrived = team->t.t_bar[b].b_team_arrived; 5166 #endif 5167 } 5168 } 5169 if (hot_teams[level].hot_team_nth >= new_nproc) { 5170 // we have all needed threads in reserve, no need to allocate any 5171 // this only possible in mode 1, cannot have reserved threads in mode 0 5172 KMP_DEBUG_ASSERT(__kmp_hot_teams_mode == 1); 5173 team->t.t_nproc = new_nproc; // just get reserved threads involved 5174 } else { 5175 // we may have some threads in reserve, but not enough 5176 team->t.t_nproc = 5177 hot_teams[level] 5178 .hot_team_nth; // get reserved threads involved if any 5179 hot_teams[level].hot_team_nth = new_nproc; // adjust hot team max size 5180 #endif // KMP_NESTED_HOT_TEAMS 5181 if (team->t.t_max_nproc < new_nproc) { 5182 /* reallocate larger arrays */ 5183 __kmp_reallocate_team_arrays(team, new_nproc); 5184 __kmp_reinitialize_team(team, new_icvs, NULL); 5185 } 5186 5187 #if (KMP_OS_LINUX || KMP_OS_FREEBSD) && KMP_AFFINITY_SUPPORTED 5188 /* Temporarily set full mask for master thread before creation of 5189 workers. The reason is that workers inherit the affinity from master, 5190 so if a lot of workers are created on the single core quickly, they 5191 don't get a chance to set their own affinity for a long time. */ 5192 __kmp_set_thread_affinity_mask_full_tmp(old_mask); 5193 #endif 5194 5195 /* allocate new threads for the hot team */ 5196 for (f = team->t.t_nproc; f < new_nproc; f++) { 5197 kmp_info_t *new_worker = __kmp_allocate_thread(root, team, f); 5198 KMP_DEBUG_ASSERT(new_worker); 5199 team->t.t_threads[f] = new_worker; 5200 5201 KA_TRACE(20, 5202 ("__kmp_allocate_team: team %d init T#%d arrived: " 5203 "join=%llu, plain=%llu\n", 5204 team->t.t_id, __kmp_gtid_from_tid(f, team), team->t.t_id, f, 5205 team->t.t_bar[bs_forkjoin_barrier].b_arrived, 5206 team->t.t_bar[bs_plain_barrier].b_arrived)); 5207 5208 { // Initialize barrier data for new threads. 5209 int b; 5210 kmp_balign_t *balign = new_worker->th.th_bar; 5211 for (b = 0; b < bs_last_barrier; ++b) { 5212 balign[b].bb.b_arrived = team->t.t_bar[b].b_arrived; 5213 KMP_DEBUG_ASSERT(balign[b].bb.wait_flag != 5214 KMP_BARRIER_PARENT_FLAG); 5215 #if USE_DEBUGGER 5216 balign[b].bb.b_worker_arrived = team->t.t_bar[b].b_team_arrived; 5217 #endif 5218 } 5219 } 5220 } 5221 5222 #if (KMP_OS_LINUX || KMP_OS_FREEBSD) && KMP_AFFINITY_SUPPORTED 5223 if (KMP_AFFINITY_CAPABLE()) { 5224 /* Restore initial master thread's affinity mask */ 5225 __kmp_set_system_affinity(old_mask, TRUE); 5226 KMP_CPU_FREE(old_mask); 5227 } 5228 #endif 5229 #if KMP_NESTED_HOT_TEAMS 5230 } // end of check of t_nproc vs. new_nproc vs. hot_team_nth 5231 #endif // KMP_NESTED_HOT_TEAMS 5232 /* make sure everyone is syncronized */ 5233 int old_nproc = team->t.t_nproc; // save old value and use to update only 5234 // new threads below 5235 __kmp_initialize_team(team, new_nproc, new_icvs, 5236 root->r.r_uber_thread->th.th_ident); 5237 5238 /* reinitialize the threads */ 5239 KMP_DEBUG_ASSERT(team->t.t_nproc == new_nproc); 5240 for (f = 0; f < team->t.t_nproc; ++f) 5241 __kmp_initialize_info(team->t.t_threads[f], team, f, 5242 __kmp_gtid_from_tid(f, team)); 5243 5244 if (level) { // set th_task_state for new threads in nested hot team 5245 // __kmp_initialize_info() no longer zeroes th_task_state, so we should 5246 // only need to set the th_task_state for the new threads. th_task_state 5247 // for master thread will not be accurate until after this in 5248 // __kmp_fork_call(), so we look to the master's memo_stack to get the 5249 // correct value. 5250 for (f = old_nproc; f < team->t.t_nproc; ++f) 5251 team->t.t_threads[f]->th.th_task_state = 5252 team->t.t_threads[0]->th.th_task_state_memo_stack[level]; 5253 } else { // set th_task_state for new threads in non-nested hot team 5254 kmp_uint8 old_state = 5255 team->t.t_threads[0]->th.th_task_state; // copy master's state 5256 for (f = old_nproc; f < team->t.t_nproc; ++f) 5257 team->t.t_threads[f]->th.th_task_state = old_state; 5258 } 5259 5260 #ifdef KMP_DEBUG 5261 for (f = 0; f < team->t.t_nproc; ++f) { 5262 KMP_DEBUG_ASSERT(team->t.t_threads[f] && 5263 team->t.t_threads[f]->th.th_team_nproc == 5264 team->t.t_nproc); 5265 } 5266 #endif 5267 5268 KMP_CHECK_UPDATE(team->t.t_proc_bind, new_proc_bind); 5269 #if KMP_AFFINITY_SUPPORTED 5270 __kmp_partition_places(team); 5271 #endif 5272 } // Check changes in number of threads 5273 5274 kmp_info_t *master = team->t.t_threads[0]; 5275 if (master->th.th_teams_microtask) { 5276 for (f = 1; f < new_nproc; ++f) { 5277 // propagate teams construct specific info to workers 5278 kmp_info_t *thr = team->t.t_threads[f]; 5279 thr->th.th_teams_microtask = master->th.th_teams_microtask; 5280 thr->th.th_teams_level = master->th.th_teams_level; 5281 thr->th.th_teams_size = master->th.th_teams_size; 5282 } 5283 } 5284 #if KMP_NESTED_HOT_TEAMS 5285 if (level) { 5286 // Sync barrier state for nested hot teams, not needed for outermost hot 5287 // team. 5288 for (f = 1; f < new_nproc; ++f) { 5289 kmp_info_t *thr = team->t.t_threads[f]; 5290 int b; 5291 kmp_balign_t *balign = thr->th.th_bar; 5292 for (b = 0; b < bs_last_barrier; ++b) { 5293 balign[b].bb.b_arrived = team->t.t_bar[b].b_arrived; 5294 KMP_DEBUG_ASSERT(balign[b].bb.wait_flag != KMP_BARRIER_PARENT_FLAG); 5295 #if USE_DEBUGGER 5296 balign[b].bb.b_worker_arrived = team->t.t_bar[b].b_team_arrived; 5297 #endif 5298 } 5299 } 5300 } 5301 #endif // KMP_NESTED_HOT_TEAMS 5302 5303 /* reallocate space for arguments if necessary */ 5304 __kmp_alloc_argv_entries(argc, team, TRUE); 5305 KMP_CHECK_UPDATE(team->t.t_argc, argc); 5306 // The hot team re-uses the previous task team, 5307 // if untouched during the previous release->gather phase. 5308 5309 KF_TRACE(10, (" hot_team = %p\n", team)); 5310 5311 #if KMP_DEBUG 5312 if (__kmp_tasking_mode != tskm_immediate_exec) { 5313 KA_TRACE(20, ("__kmp_allocate_team: hot team task_team[0] = %p " 5314 "task_team[1] = %p after reinit\n", 5315 team->t.t_task_team[0], team->t.t_task_team[1])); 5316 } 5317 #endif 5318 5319 #if OMPT_SUPPORT 5320 __ompt_team_assign_id(team, ompt_parallel_data); 5321 #endif 5322 5323 KMP_MB(); 5324 5325 return team; 5326 } 5327 5328 /* next, let's try to take one from the team pool */ 5329 KMP_MB(); 5330 for (team = CCAST(kmp_team_t *, __kmp_team_pool); (team);) { 5331 /* TODO: consider resizing undersized teams instead of reaping them, now 5332 that we have a resizing mechanism */ 5333 if (team->t.t_max_nproc >= max_nproc) { 5334 /* take this team from the team pool */ 5335 __kmp_team_pool = team->t.t_next_pool; 5336 5337 /* setup the team for fresh use */ 5338 __kmp_initialize_team(team, new_nproc, new_icvs, NULL); 5339 5340 KA_TRACE(20, ("__kmp_allocate_team: setting task_team[0] %p and " 5341 "task_team[1] %p to NULL\n", 5342 &team->t.t_task_team[0], &team->t.t_task_team[1])); 5343 team->t.t_task_team[0] = NULL; 5344 team->t.t_task_team[1] = NULL; 5345 5346 /* reallocate space for arguments if necessary */ 5347 __kmp_alloc_argv_entries(argc, team, TRUE); 5348 KMP_CHECK_UPDATE(team->t.t_argc, argc); 5349 5350 KA_TRACE( 5351 20, ("__kmp_allocate_team: team %d init arrived: join=%u, plain=%u\n", 5352 team->t.t_id, KMP_INIT_BARRIER_STATE, KMP_INIT_BARRIER_STATE)); 5353 { // Initialize barrier data. 5354 int b; 5355 for (b = 0; b < bs_last_barrier; ++b) { 5356 team->t.t_bar[b].b_arrived = KMP_INIT_BARRIER_STATE; 5357 #if USE_DEBUGGER 5358 team->t.t_bar[b].b_master_arrived = 0; 5359 team->t.t_bar[b].b_team_arrived = 0; 5360 #endif 5361 } 5362 } 5363 5364 team->t.t_proc_bind = new_proc_bind; 5365 5366 KA_TRACE(20, ("__kmp_allocate_team: using team from pool %d.\n", 5367 team->t.t_id)); 5368 5369 #if OMPT_SUPPORT 5370 __ompt_team_assign_id(team, ompt_parallel_data); 5371 #endif 5372 5373 KMP_MB(); 5374 5375 return team; 5376 } 5377 5378 /* reap team if it is too small, then loop back and check the next one */ 5379 // not sure if this is wise, but, will be redone during the hot-teams 5380 // rewrite. 5381 /* TODO: Use technique to find the right size hot-team, don't reap them */ 5382 team = __kmp_reap_team(team); 5383 __kmp_team_pool = team; 5384 } 5385 5386 /* nothing available in the pool, no matter, make a new team! */ 5387 KMP_MB(); 5388 team = (kmp_team_t *)__kmp_allocate(sizeof(kmp_team_t)); 5389 5390 /* and set it up */ 5391 team->t.t_max_nproc = max_nproc; 5392 /* NOTE well, for some reason allocating one big buffer and dividing it up 5393 seems to really hurt performance a lot on the P4, so, let's not use this */ 5394 __kmp_allocate_team_arrays(team, max_nproc); 5395 5396 KA_TRACE(20, ("__kmp_allocate_team: making a new team\n")); 5397 __kmp_initialize_team(team, new_nproc, new_icvs, NULL); 5398 5399 KA_TRACE(20, ("__kmp_allocate_team: setting task_team[0] %p and task_team[1] " 5400 "%p to NULL\n", 5401 &team->t.t_task_team[0], &team->t.t_task_team[1])); 5402 team->t.t_task_team[0] = NULL; // to be removed, as __kmp_allocate zeroes 5403 // memory, no need to duplicate 5404 team->t.t_task_team[1] = NULL; // to be removed, as __kmp_allocate zeroes 5405 // memory, no need to duplicate 5406 5407 if (__kmp_storage_map) { 5408 __kmp_print_team_storage_map("team", team, team->t.t_id, new_nproc); 5409 } 5410 5411 /* allocate space for arguments */ 5412 __kmp_alloc_argv_entries(argc, team, FALSE); 5413 team->t.t_argc = argc; 5414 5415 KA_TRACE(20, 5416 ("__kmp_allocate_team: team %d init arrived: join=%u, plain=%u\n", 5417 team->t.t_id, KMP_INIT_BARRIER_STATE, KMP_INIT_BARRIER_STATE)); 5418 { // Initialize barrier data. 5419 int b; 5420 for (b = 0; b < bs_last_barrier; ++b) { 5421 team->t.t_bar[b].b_arrived = KMP_INIT_BARRIER_STATE; 5422 #if USE_DEBUGGER 5423 team->t.t_bar[b].b_master_arrived = 0; 5424 team->t.t_bar[b].b_team_arrived = 0; 5425 #endif 5426 } 5427 } 5428 5429 team->t.t_proc_bind = new_proc_bind; 5430 5431 #if OMPT_SUPPORT 5432 __ompt_team_assign_id(team, ompt_parallel_data); 5433 team->t.ompt_serialized_team_info = NULL; 5434 #endif 5435 5436 KMP_MB(); 5437 5438 KA_TRACE(20, ("__kmp_allocate_team: done creating a new team %d.\n", 5439 team->t.t_id)); 5440 5441 return team; 5442 } 5443 5444 /* TODO implement hot-teams at all levels */ 5445 /* TODO implement lazy thread release on demand (disband request) */ 5446 5447 /* free the team. return it to the team pool. release all the threads 5448 * associated with it */ 5449 void __kmp_free_team(kmp_root_t *root, 5450 kmp_team_t *team USE_NESTED_HOT_ARG(kmp_info_t *master)) { 5451 int f; 5452 KA_TRACE(20, ("__kmp_free_team: T#%d freeing team %d\n", __kmp_get_gtid(), 5453 team->t.t_id)); 5454 5455 /* verify state */ 5456 KMP_DEBUG_ASSERT(root); 5457 KMP_DEBUG_ASSERT(team); 5458 KMP_DEBUG_ASSERT(team->t.t_nproc <= team->t.t_max_nproc); 5459 KMP_DEBUG_ASSERT(team->t.t_threads); 5460 5461 int use_hot_team = team == root->r.r_hot_team; 5462 #if KMP_NESTED_HOT_TEAMS 5463 int level; 5464 kmp_hot_team_ptr_t *hot_teams; 5465 if (master) { 5466 level = team->t.t_active_level - 1; 5467 if (master->th.th_teams_microtask) { // in teams construct? 5468 if (master->th.th_teams_size.nteams > 1) { 5469 ++level; // level was not increased in teams construct for 5470 // team_of_masters 5471 } 5472 if (team->t.t_pkfn != (microtask_t)__kmp_teams_master && 5473 master->th.th_teams_level == team->t.t_level) { 5474 ++level; // level was not increased in teams construct for 5475 // team_of_workers before the parallel 5476 } // team->t.t_level will be increased inside parallel 5477 } 5478 hot_teams = master->th.th_hot_teams; 5479 if (level < __kmp_hot_teams_max_level) { 5480 KMP_DEBUG_ASSERT(team == hot_teams[level].hot_team); 5481 use_hot_team = 1; 5482 } 5483 } 5484 #endif // KMP_NESTED_HOT_TEAMS 5485 5486 /* team is done working */ 5487 TCW_SYNC_PTR(team->t.t_pkfn, 5488 NULL); // Important for Debugging Support Library. 5489 #if KMP_OS_WINDOWS 5490 team->t.t_copyin_counter = 0; // init counter for possible reuse 5491 #endif 5492 // Do not reset pointer to parent team to NULL for hot teams. 5493 5494 /* if we are non-hot team, release our threads */ 5495 if (!use_hot_team) { 5496 if (__kmp_tasking_mode != tskm_immediate_exec) { 5497 // Wait for threads to reach reapable state 5498 for (f = 1; f < team->t.t_nproc; ++f) { 5499 KMP_DEBUG_ASSERT(team->t.t_threads[f]); 5500 kmp_info_t *th = team->t.t_threads[f]; 5501 volatile kmp_uint32 *state = &th->th.th_reap_state; 5502 while (*state != KMP_SAFE_TO_REAP) { 5503 #if KMP_OS_WINDOWS 5504 // On Windows a thread can be killed at any time, check this 5505 DWORD ecode; 5506 if (!__kmp_is_thread_alive(th, &ecode)) { 5507 *state = KMP_SAFE_TO_REAP; // reset the flag for dead thread 5508 break; 5509 } 5510 #endif 5511 // first check if thread is sleeping 5512 kmp_flag_64<> fl(&th->th.th_bar[bs_forkjoin_barrier].bb.b_go, th); 5513 if (fl.is_sleeping()) 5514 fl.resume(__kmp_gtid_from_thread(th)); 5515 KMP_CPU_PAUSE(); 5516 } 5517 } 5518 5519 // Delete task teams 5520 int tt_idx; 5521 for (tt_idx = 0; tt_idx < 2; ++tt_idx) { 5522 kmp_task_team_t *task_team = team->t.t_task_team[tt_idx]; 5523 if (task_team != NULL) { 5524 for (f = 0; f < team->t.t_nproc; ++f) { // threads unref task teams 5525 KMP_DEBUG_ASSERT(team->t.t_threads[f]); 5526 team->t.t_threads[f]->th.th_task_team = NULL; 5527 } 5528 KA_TRACE( 5529 20, 5530 ("__kmp_free_team: T#%d deactivating task_team %p on team %d\n", 5531 __kmp_get_gtid(), task_team, team->t.t_id)); 5532 #if KMP_NESTED_HOT_TEAMS 5533 __kmp_free_task_team(master, task_team); 5534 #endif 5535 team->t.t_task_team[tt_idx] = NULL; 5536 } 5537 } 5538 } 5539 5540 // Reset pointer to parent team only for non-hot teams. 5541 team->t.t_parent = NULL; 5542 team->t.t_level = 0; 5543 team->t.t_active_level = 0; 5544 5545 /* free the worker threads */ 5546 for (f = 1; f < team->t.t_nproc; ++f) { 5547 KMP_DEBUG_ASSERT(team->t.t_threads[f]); 5548 __kmp_free_thread(team->t.t_threads[f]); 5549 team->t.t_threads[f] = NULL; 5550 } 5551 5552 /* put the team back in the team pool */ 5553 /* TODO limit size of team pool, call reap_team if pool too large */ 5554 team->t.t_next_pool = CCAST(kmp_team_t *, __kmp_team_pool); 5555 __kmp_team_pool = (volatile kmp_team_t *)team; 5556 } else { // Check if team was created for the masters in a teams construct 5557 // See if first worker is a CG root 5558 KMP_DEBUG_ASSERT(team->t.t_threads[1] && 5559 team->t.t_threads[1]->th.th_cg_roots); 5560 if (team->t.t_threads[1]->th.th_cg_roots->cg_root == team->t.t_threads[1]) { 5561 // Clean up the CG root nodes on workers so that this team can be re-used 5562 for (f = 1; f < team->t.t_nproc; ++f) { 5563 kmp_info_t *thr = team->t.t_threads[f]; 5564 KMP_DEBUG_ASSERT(thr && thr->th.th_cg_roots && 5565 thr->th.th_cg_roots->cg_root == thr); 5566 // Pop current CG root off list 5567 kmp_cg_root_t *tmp = thr->th.th_cg_roots; 5568 thr->th.th_cg_roots = tmp->up; 5569 KA_TRACE(100, ("__kmp_free_team: Thread %p popping node %p and moving" 5570 " up to node %p. cg_nthreads was %d\n", 5571 thr, tmp, thr->th.th_cg_roots, tmp->cg_nthreads)); 5572 int i = tmp->cg_nthreads--; 5573 if (i == 1) { 5574 __kmp_free(tmp); // free CG if we are the last thread in it 5575 } 5576 // Restore current task's thread_limit from CG root 5577 if (thr->th.th_cg_roots) 5578 thr->th.th_current_task->td_icvs.thread_limit = 5579 thr->th.th_cg_roots->cg_thread_limit; 5580 } 5581 } 5582 } 5583 5584 KMP_MB(); 5585 } 5586 5587 /* reap the team. destroy it, reclaim all its resources and free its memory */ 5588 kmp_team_t *__kmp_reap_team(kmp_team_t *team) { 5589 kmp_team_t *next_pool = team->t.t_next_pool; 5590 5591 KMP_DEBUG_ASSERT(team); 5592 KMP_DEBUG_ASSERT(team->t.t_dispatch); 5593 KMP_DEBUG_ASSERT(team->t.t_disp_buffer); 5594 KMP_DEBUG_ASSERT(team->t.t_threads); 5595 KMP_DEBUG_ASSERT(team->t.t_argv); 5596 5597 /* TODO clean the threads that are a part of this? */ 5598 5599 /* free stuff */ 5600 __kmp_free_team_arrays(team); 5601 if (team->t.t_argv != &team->t.t_inline_argv[0]) 5602 __kmp_free((void *)team->t.t_argv); 5603 __kmp_free(team); 5604 5605 KMP_MB(); 5606 return next_pool; 5607 } 5608 5609 // Free the thread. Don't reap it, just place it on the pool of available 5610 // threads. 5611 // 5612 // Changes for Quad issue 527845: We need a predictable OMP tid <-> gtid 5613 // binding for the affinity mechanism to be useful. 5614 // 5615 // Now, we always keep the free list (__kmp_thread_pool) sorted by gtid. 5616 // However, we want to avoid a potential performance problem by always 5617 // scanning through the list to find the correct point at which to insert 5618 // the thread (potential N**2 behavior). To do this we keep track of the 5619 // last place a thread struct was inserted (__kmp_thread_pool_insert_pt). 5620 // With single-level parallelism, threads will always be added to the tail 5621 // of the list, kept track of by __kmp_thread_pool_insert_pt. With nested 5622 // parallelism, all bets are off and we may need to scan through the entire 5623 // free list. 5624 // 5625 // This change also has a potentially large performance benefit, for some 5626 // applications. Previously, as threads were freed from the hot team, they 5627 // would be placed back on the free list in inverse order. If the hot team 5628 // grew back to it's original size, then the freed thread would be placed 5629 // back on the hot team in reverse order. This could cause bad cache 5630 // locality problems on programs where the size of the hot team regularly 5631 // grew and shrunk. 5632 // 5633 // Now, for single-level parallelism, the OMP tid is always == gtid. 5634 void __kmp_free_thread(kmp_info_t *this_th) { 5635 int gtid; 5636 kmp_info_t **scan; 5637 5638 KA_TRACE(20, ("__kmp_free_thread: T#%d putting T#%d back on free pool.\n", 5639 __kmp_get_gtid(), this_th->th.th_info.ds.ds_gtid)); 5640 5641 KMP_DEBUG_ASSERT(this_th); 5642 5643 // When moving thread to pool, switch thread to wait on own b_go flag, and 5644 // uninitialized (NULL team). 5645 int b; 5646 kmp_balign_t *balign = this_th->th.th_bar; 5647 for (b = 0; b < bs_last_barrier; ++b) { 5648 if (balign[b].bb.wait_flag == KMP_BARRIER_PARENT_FLAG) 5649 balign[b].bb.wait_flag = KMP_BARRIER_SWITCH_TO_OWN_FLAG; 5650 balign[b].bb.team = NULL; 5651 balign[b].bb.leaf_kids = 0; 5652 } 5653 this_th->th.th_task_state = 0; 5654 this_th->th.th_reap_state = KMP_SAFE_TO_REAP; 5655 5656 /* put thread back on the free pool */ 5657 TCW_PTR(this_th->th.th_team, NULL); 5658 TCW_PTR(this_th->th.th_root, NULL); 5659 TCW_PTR(this_th->th.th_dispatch, NULL); /* NOT NEEDED */ 5660 5661 while (this_th->th.th_cg_roots) { 5662 this_th->th.th_cg_roots->cg_nthreads--; 5663 KA_TRACE(100, ("__kmp_free_thread: Thread %p decrement cg_nthreads on node" 5664 " %p of thread %p to %d\n", 5665 this_th, this_th->th.th_cg_roots, 5666 this_th->th.th_cg_roots->cg_root, 5667 this_th->th.th_cg_roots->cg_nthreads)); 5668 kmp_cg_root_t *tmp = this_th->th.th_cg_roots; 5669 if (tmp->cg_root == this_th) { // Thread is a cg_root 5670 KMP_DEBUG_ASSERT(tmp->cg_nthreads == 0); 5671 KA_TRACE( 5672 5, ("__kmp_free_thread: Thread %p freeing node %p\n", this_th, tmp)); 5673 this_th->th.th_cg_roots = tmp->up; 5674 __kmp_free(tmp); 5675 } else { // Worker thread 5676 if (tmp->cg_nthreads == 0) { // last thread leaves contention group 5677 __kmp_free(tmp); 5678 } 5679 this_th->th.th_cg_roots = NULL; 5680 break; 5681 } 5682 } 5683 5684 /* If the implicit task assigned to this thread can be used by other threads 5685 * -> multiple threads can share the data and try to free the task at 5686 * __kmp_reap_thread at exit. This duplicate use of the task data can happen 5687 * with higher probability when hot team is disabled but can occurs even when 5688 * the hot team is enabled */ 5689 __kmp_free_implicit_task(this_th); 5690 this_th->th.th_current_task = NULL; 5691 5692 // If the __kmp_thread_pool_insert_pt is already past the new insert 5693 // point, then we need to re-scan the entire list. 5694 gtid = this_th->th.th_info.ds.ds_gtid; 5695 if (__kmp_thread_pool_insert_pt != NULL) { 5696 KMP_DEBUG_ASSERT(__kmp_thread_pool != NULL); 5697 if (__kmp_thread_pool_insert_pt->th.th_info.ds.ds_gtid > gtid) { 5698 __kmp_thread_pool_insert_pt = NULL; 5699 } 5700 } 5701 5702 // Scan down the list to find the place to insert the thread. 5703 // scan is the address of a link in the list, possibly the address of 5704 // __kmp_thread_pool itself. 5705 // 5706 // In the absence of nested parallelism, the for loop will have 0 iterations. 5707 if (__kmp_thread_pool_insert_pt != NULL) { 5708 scan = &(__kmp_thread_pool_insert_pt->th.th_next_pool); 5709 } else { 5710 scan = CCAST(kmp_info_t **, &__kmp_thread_pool); 5711 } 5712 for (; (*scan != NULL) && ((*scan)->th.th_info.ds.ds_gtid < gtid); 5713 scan = &((*scan)->th.th_next_pool)) 5714 ; 5715 5716 // Insert the new element on the list, and set __kmp_thread_pool_insert_pt 5717 // to its address. 5718 TCW_PTR(this_th->th.th_next_pool, *scan); 5719 __kmp_thread_pool_insert_pt = *scan = this_th; 5720 KMP_DEBUG_ASSERT((this_th->th.th_next_pool == NULL) || 5721 (this_th->th.th_info.ds.ds_gtid < 5722 this_th->th.th_next_pool->th.th_info.ds.ds_gtid)); 5723 TCW_4(this_th->th.th_in_pool, TRUE); 5724 __kmp_suspend_initialize_thread(this_th); 5725 __kmp_lock_suspend_mx(this_th); 5726 if (this_th->th.th_active == TRUE) { 5727 KMP_ATOMIC_INC(&__kmp_thread_pool_active_nth); 5728 this_th->th.th_active_in_pool = TRUE; 5729 } 5730 #if KMP_DEBUG 5731 else { 5732 KMP_DEBUG_ASSERT(this_th->th.th_active_in_pool == FALSE); 5733 } 5734 #endif 5735 __kmp_unlock_suspend_mx(this_th); 5736 5737 TCW_4(__kmp_nth, __kmp_nth - 1); 5738 5739 #ifdef KMP_ADJUST_BLOCKTIME 5740 /* Adjust blocktime back to user setting or default if necessary */ 5741 /* Middle initialization might never have occurred */ 5742 if (!__kmp_env_blocktime && (__kmp_avail_proc > 0)) { 5743 KMP_DEBUG_ASSERT(__kmp_avail_proc > 0); 5744 if (__kmp_nth <= __kmp_avail_proc) { 5745 __kmp_zero_bt = FALSE; 5746 } 5747 } 5748 #endif /* KMP_ADJUST_BLOCKTIME */ 5749 5750 KMP_MB(); 5751 } 5752 5753 /* ------------------------------------------------------------------------ */ 5754 5755 void *__kmp_launch_thread(kmp_info_t *this_thr) { 5756 #if OMP_PROFILING_SUPPORT 5757 ProfileTraceFile = getenv("LIBOMPTARGET_PROFILE"); 5758 // TODO: add a configuration option for time granularity 5759 if (ProfileTraceFile) 5760 llvm::timeTraceProfilerInitialize(500 /* us */, "libomptarget"); 5761 #endif 5762 5763 int gtid = this_thr->th.th_info.ds.ds_gtid; 5764 /* void *stack_data;*/ 5765 kmp_team_t **volatile pteam; 5766 5767 KMP_MB(); 5768 KA_TRACE(10, ("__kmp_launch_thread: T#%d start\n", gtid)); 5769 5770 if (__kmp_env_consistency_check) { 5771 this_thr->th.th_cons = __kmp_allocate_cons_stack(gtid); // ATT: Memory leak? 5772 } 5773 5774 #if OMPT_SUPPORT 5775 ompt_data_t *thread_data; 5776 if (ompt_enabled.enabled) { 5777 thread_data = &(this_thr->th.ompt_thread_info.thread_data); 5778 *thread_data = ompt_data_none; 5779 5780 this_thr->th.ompt_thread_info.state = ompt_state_overhead; 5781 this_thr->th.ompt_thread_info.wait_id = 0; 5782 this_thr->th.ompt_thread_info.idle_frame = OMPT_GET_FRAME_ADDRESS(0); 5783 this_thr->th.ompt_thread_info.parallel_flags = 0; 5784 if (ompt_enabled.ompt_callback_thread_begin) { 5785 ompt_callbacks.ompt_callback(ompt_callback_thread_begin)( 5786 ompt_thread_worker, thread_data); 5787 } 5788 this_thr->th.ompt_thread_info.state = ompt_state_idle; 5789 } 5790 #endif 5791 5792 /* This is the place where threads wait for work */ 5793 while (!TCR_4(__kmp_global.g.g_done)) { 5794 KMP_DEBUG_ASSERT(this_thr == __kmp_threads[gtid]); 5795 KMP_MB(); 5796 5797 /* wait for work to do */ 5798 KA_TRACE(20, ("__kmp_launch_thread: T#%d waiting for work\n", gtid)); 5799 5800 /* No tid yet since not part of a team */ 5801 __kmp_fork_barrier(gtid, KMP_GTID_DNE); 5802 5803 #if OMPT_SUPPORT 5804 if (ompt_enabled.enabled) { 5805 this_thr->th.ompt_thread_info.state = ompt_state_overhead; 5806 } 5807 #endif 5808 5809 pteam = &this_thr->th.th_team; 5810 5811 /* have we been allocated? */ 5812 if (TCR_SYNC_PTR(*pteam) && !TCR_4(__kmp_global.g.g_done)) { 5813 /* we were just woken up, so run our new task */ 5814 if (TCR_SYNC_PTR((*pteam)->t.t_pkfn) != NULL) { 5815 int rc; 5816 KA_TRACE(20, 5817 ("__kmp_launch_thread: T#%d(%d:%d) invoke microtask = %p\n", 5818 gtid, (*pteam)->t.t_id, __kmp_tid_from_gtid(gtid), 5819 (*pteam)->t.t_pkfn)); 5820 5821 updateHWFPControl(*pteam); 5822 5823 #if OMPT_SUPPORT 5824 if (ompt_enabled.enabled) { 5825 this_thr->th.ompt_thread_info.state = ompt_state_work_parallel; 5826 } 5827 #endif 5828 5829 rc = (*pteam)->t.t_invoke(gtid); 5830 KMP_ASSERT(rc); 5831 5832 KMP_MB(); 5833 KA_TRACE(20, ("__kmp_launch_thread: T#%d(%d:%d) done microtask = %p\n", 5834 gtid, (*pteam)->t.t_id, __kmp_tid_from_gtid(gtid), 5835 (*pteam)->t.t_pkfn)); 5836 } 5837 #if OMPT_SUPPORT 5838 if (ompt_enabled.enabled) { 5839 /* no frame set while outside task */ 5840 __ompt_get_task_info_object(0)->frame.exit_frame = ompt_data_none; 5841 5842 this_thr->th.ompt_thread_info.state = ompt_state_overhead; 5843 } 5844 #endif 5845 /* join barrier after parallel region */ 5846 __kmp_join_barrier(gtid); 5847 } 5848 } 5849 TCR_SYNC_PTR((intptr_t)__kmp_global.g.g_done); 5850 5851 #if OMPT_SUPPORT 5852 if (ompt_enabled.ompt_callback_thread_end) { 5853 ompt_callbacks.ompt_callback(ompt_callback_thread_end)(thread_data); 5854 } 5855 #endif 5856 5857 this_thr->th.th_task_team = NULL; 5858 /* run the destructors for the threadprivate data for this thread */ 5859 __kmp_common_destroy_gtid(gtid); 5860 5861 KA_TRACE(10, ("__kmp_launch_thread: T#%d done\n", gtid)); 5862 KMP_MB(); 5863 5864 #if OMP_PROFILING_SUPPORT 5865 llvm::timeTraceProfilerFinishThread(); 5866 #endif 5867 return this_thr; 5868 } 5869 5870 /* ------------------------------------------------------------------------ */ 5871 5872 void __kmp_internal_end_dest(void *specific_gtid) { 5873 // Make sure no significant bits are lost 5874 int gtid; 5875 __kmp_type_convert((kmp_intptr_t)specific_gtid - 1, >id); 5876 5877 KA_TRACE(30, ("__kmp_internal_end_dest: T#%d\n", gtid)); 5878 /* NOTE: the gtid is stored as gitd+1 in the thread-local-storage 5879 * this is because 0 is reserved for the nothing-stored case */ 5880 5881 __kmp_internal_end_thread(gtid); 5882 } 5883 5884 #if KMP_OS_UNIX && KMP_DYNAMIC_LIB 5885 5886 __attribute__((destructor)) void __kmp_internal_end_dtor(void) { 5887 __kmp_internal_end_atexit(); 5888 } 5889 5890 #endif 5891 5892 /* [Windows] josh: when the atexit handler is called, there may still be more 5893 than one thread alive */ 5894 void __kmp_internal_end_atexit(void) { 5895 KA_TRACE(30, ("__kmp_internal_end_atexit\n")); 5896 /* [Windows] 5897 josh: ideally, we want to completely shutdown the library in this atexit 5898 handler, but stat code that depends on thread specific data for gtid fails 5899 because that data becomes unavailable at some point during the shutdown, so 5900 we call __kmp_internal_end_thread instead. We should eventually remove the 5901 dependency on __kmp_get_specific_gtid in the stat code and use 5902 __kmp_internal_end_library to cleanly shutdown the library. 5903 5904 // TODO: Can some of this comment about GVS be removed? 5905 I suspect that the offending stat code is executed when the calling thread 5906 tries to clean up a dead root thread's data structures, resulting in GVS 5907 code trying to close the GVS structures for that thread, but since the stat 5908 code uses __kmp_get_specific_gtid to get the gtid with the assumption that 5909 the calling thread is cleaning up itself instead of another thread, it get 5910 confused. This happens because allowing a thread to unregister and cleanup 5911 another thread is a recent modification for addressing an issue. 5912 Based on the current design (20050722), a thread may end up 5913 trying to unregister another thread only if thread death does not trigger 5914 the calling of __kmp_internal_end_thread. For Linux* OS, there is the 5915 thread specific data destructor function to detect thread death. For 5916 Windows dynamic, there is DllMain(THREAD_DETACH). For Windows static, there 5917 is nothing. Thus, the workaround is applicable only for Windows static 5918 stat library. */ 5919 __kmp_internal_end_library(-1); 5920 #if KMP_OS_WINDOWS 5921 __kmp_close_console(); 5922 #endif 5923 } 5924 5925 static void __kmp_reap_thread(kmp_info_t *thread, int is_root) { 5926 // It is assumed __kmp_forkjoin_lock is acquired. 5927 5928 int gtid; 5929 5930 KMP_DEBUG_ASSERT(thread != NULL); 5931 5932 gtid = thread->th.th_info.ds.ds_gtid; 5933 5934 if (!is_root) { 5935 if (__kmp_dflt_blocktime != KMP_MAX_BLOCKTIME) { 5936 /* Assume the threads are at the fork barrier here */ 5937 KA_TRACE( 5938 20, ("__kmp_reap_thread: releasing T#%d from fork barrier for reap\n", 5939 gtid)); 5940 /* Need release fence here to prevent seg faults for tree forkjoin barrier 5941 * (GEH) */ 5942 ANNOTATE_HAPPENS_BEFORE(thread); 5943 kmp_flag_64<> flag(&thread->th.th_bar[bs_forkjoin_barrier].bb.b_go, 5944 thread); 5945 __kmp_release_64(&flag); 5946 } 5947 5948 // Terminate OS thread. 5949 __kmp_reap_worker(thread); 5950 5951 // The thread was killed asynchronously. If it was actively 5952 // spinning in the thread pool, decrement the global count. 5953 // 5954 // There is a small timing hole here - if the worker thread was just waking 5955 // up after sleeping in the pool, had reset it's th_active_in_pool flag but 5956 // not decremented the global counter __kmp_thread_pool_active_nth yet, then 5957 // the global counter might not get updated. 5958 // 5959 // Currently, this can only happen as the library is unloaded, 5960 // so there are no harmful side effects. 5961 if (thread->th.th_active_in_pool) { 5962 thread->th.th_active_in_pool = FALSE; 5963 KMP_ATOMIC_DEC(&__kmp_thread_pool_active_nth); 5964 KMP_DEBUG_ASSERT(__kmp_thread_pool_active_nth >= 0); 5965 } 5966 } 5967 5968 __kmp_free_implicit_task(thread); 5969 5970 // Free the fast memory for tasking 5971 #if USE_FAST_MEMORY 5972 __kmp_free_fast_memory(thread); 5973 #endif /* USE_FAST_MEMORY */ 5974 5975 __kmp_suspend_uninitialize_thread(thread); 5976 5977 KMP_DEBUG_ASSERT(__kmp_threads[gtid] == thread); 5978 TCW_SYNC_PTR(__kmp_threads[gtid], NULL); 5979 5980 --__kmp_all_nth; 5981 // __kmp_nth was decremented when thread is added to the pool. 5982 5983 #ifdef KMP_ADJUST_BLOCKTIME 5984 /* Adjust blocktime back to user setting or default if necessary */ 5985 /* Middle initialization might never have occurred */ 5986 if (!__kmp_env_blocktime && (__kmp_avail_proc > 0)) { 5987 KMP_DEBUG_ASSERT(__kmp_avail_proc > 0); 5988 if (__kmp_nth <= __kmp_avail_proc) { 5989 __kmp_zero_bt = FALSE; 5990 } 5991 } 5992 #endif /* KMP_ADJUST_BLOCKTIME */ 5993 5994 /* free the memory being used */ 5995 if (__kmp_env_consistency_check) { 5996 if (thread->th.th_cons) { 5997 __kmp_free_cons_stack(thread->th.th_cons); 5998 thread->th.th_cons = NULL; 5999 } 6000 } 6001 6002 if (thread->th.th_pri_common != NULL) { 6003 __kmp_free(thread->th.th_pri_common); 6004 thread->th.th_pri_common = NULL; 6005 } 6006 6007 if (thread->th.th_task_state_memo_stack != NULL) { 6008 __kmp_free(thread->th.th_task_state_memo_stack); 6009 thread->th.th_task_state_memo_stack = NULL; 6010 } 6011 6012 #if KMP_USE_BGET 6013 if (thread->th.th_local.bget_data != NULL) { 6014 __kmp_finalize_bget(thread); 6015 } 6016 #endif 6017 6018 #if KMP_AFFINITY_SUPPORTED 6019 if (thread->th.th_affin_mask != NULL) { 6020 KMP_CPU_FREE(thread->th.th_affin_mask); 6021 thread->th.th_affin_mask = NULL; 6022 } 6023 #endif /* KMP_AFFINITY_SUPPORTED */ 6024 6025 #if KMP_USE_HIER_SCHED 6026 if (thread->th.th_hier_bar_data != NULL) { 6027 __kmp_free(thread->th.th_hier_bar_data); 6028 thread->th.th_hier_bar_data = NULL; 6029 } 6030 #endif 6031 6032 __kmp_reap_team(thread->th.th_serial_team); 6033 thread->th.th_serial_team = NULL; 6034 __kmp_free(thread); 6035 6036 KMP_MB(); 6037 6038 } // __kmp_reap_thread 6039 6040 static void __kmp_internal_end(void) { 6041 int i; 6042 6043 /* First, unregister the library */ 6044 __kmp_unregister_library(); 6045 6046 #if KMP_OS_WINDOWS 6047 /* In Win static library, we can't tell when a root actually dies, so we 6048 reclaim the data structures for any root threads that have died but not 6049 unregistered themselves, in order to shut down cleanly. 6050 In Win dynamic library we also can't tell when a thread dies. */ 6051 __kmp_reclaim_dead_roots(); // AC: moved here to always clean resources of 6052 // dead roots 6053 #endif 6054 6055 for (i = 0; i < __kmp_threads_capacity; i++) 6056 if (__kmp_root[i]) 6057 if (__kmp_root[i]->r.r_active) 6058 break; 6059 KMP_MB(); /* Flush all pending memory write invalidates. */ 6060 TCW_SYNC_4(__kmp_global.g.g_done, TRUE); 6061 6062 if (i < __kmp_threads_capacity) { 6063 #if KMP_USE_MONITOR 6064 // 2009-09-08 (lev): Other alive roots found. Why do we kill the monitor?? 6065 KMP_MB(); /* Flush all pending memory write invalidates. */ 6066 6067 // Need to check that monitor was initialized before reaping it. If we are 6068 // called form __kmp_atfork_child (which sets __kmp_init_parallel = 0), then 6069 // __kmp_monitor will appear to contain valid data, but it is only valid in 6070 // the parent process, not the child. 6071 // New behavior (201008): instead of keying off of the flag 6072 // __kmp_init_parallel, the monitor thread creation is keyed off 6073 // of the new flag __kmp_init_monitor. 6074 __kmp_acquire_bootstrap_lock(&__kmp_monitor_lock); 6075 if (TCR_4(__kmp_init_monitor)) { 6076 __kmp_reap_monitor(&__kmp_monitor); 6077 TCW_4(__kmp_init_monitor, 0); 6078 } 6079 __kmp_release_bootstrap_lock(&__kmp_monitor_lock); 6080 KA_TRACE(10, ("__kmp_internal_end: monitor reaped\n")); 6081 #endif // KMP_USE_MONITOR 6082 } else { 6083 /* TODO move this to cleanup code */ 6084 #ifdef KMP_DEBUG 6085 /* make sure that everything has properly ended */ 6086 for (i = 0; i < __kmp_threads_capacity; i++) { 6087 if (__kmp_root[i]) { 6088 // KMP_ASSERT( ! KMP_UBER_GTID( i ) ); // AC: 6089 // there can be uber threads alive here 6090 KMP_ASSERT(!__kmp_root[i]->r.r_active); // TODO: can they be active? 6091 } 6092 } 6093 #endif 6094 6095 KMP_MB(); 6096 6097 // Reap the worker threads. 6098 // This is valid for now, but be careful if threads are reaped sooner. 6099 while (__kmp_thread_pool != NULL) { // Loop thru all the thread in the pool. 6100 // Get the next thread from the pool. 6101 kmp_info_t *thread = CCAST(kmp_info_t *, __kmp_thread_pool); 6102 __kmp_thread_pool = thread->th.th_next_pool; 6103 // Reap it. 6104 KMP_DEBUG_ASSERT(thread->th.th_reap_state == KMP_SAFE_TO_REAP); 6105 thread->th.th_next_pool = NULL; 6106 thread->th.th_in_pool = FALSE; 6107 __kmp_reap_thread(thread, 0); 6108 } 6109 __kmp_thread_pool_insert_pt = NULL; 6110 6111 // Reap teams. 6112 while (__kmp_team_pool != NULL) { // Loop thru all the teams in the pool. 6113 // Get the next team from the pool. 6114 kmp_team_t *team = CCAST(kmp_team_t *, __kmp_team_pool); 6115 __kmp_team_pool = team->t.t_next_pool; 6116 // Reap it. 6117 team->t.t_next_pool = NULL; 6118 __kmp_reap_team(team); 6119 } 6120 6121 __kmp_reap_task_teams(); 6122 6123 #if KMP_OS_UNIX 6124 // Threads that are not reaped should not access any resources since they 6125 // are going to be deallocated soon, so the shutdown sequence should wait 6126 // until all threads either exit the final spin-waiting loop or begin 6127 // sleeping after the given blocktime. 6128 for (i = 0; i < __kmp_threads_capacity; i++) { 6129 kmp_info_t *thr = __kmp_threads[i]; 6130 while (thr && KMP_ATOMIC_LD_ACQ(&thr->th.th_blocking)) 6131 KMP_CPU_PAUSE(); 6132 } 6133 #endif 6134 6135 for (i = 0; i < __kmp_threads_capacity; ++i) { 6136 // TBD: Add some checking... 6137 // Something like KMP_DEBUG_ASSERT( __kmp_thread[ i ] == NULL ); 6138 } 6139 6140 /* Make sure all threadprivate destructors get run by joining with all 6141 worker threads before resetting this flag */ 6142 TCW_SYNC_4(__kmp_init_common, FALSE); 6143 6144 KA_TRACE(10, ("__kmp_internal_end: all workers reaped\n")); 6145 KMP_MB(); 6146 6147 #if KMP_USE_MONITOR 6148 // See note above: One of the possible fixes for CQ138434 / CQ140126 6149 // 6150 // FIXME: push both code fragments down and CSE them? 6151 // push them into __kmp_cleanup() ? 6152 __kmp_acquire_bootstrap_lock(&__kmp_monitor_lock); 6153 if (TCR_4(__kmp_init_monitor)) { 6154 __kmp_reap_monitor(&__kmp_monitor); 6155 TCW_4(__kmp_init_monitor, 0); 6156 } 6157 __kmp_release_bootstrap_lock(&__kmp_monitor_lock); 6158 KA_TRACE(10, ("__kmp_internal_end: monitor reaped\n")); 6159 #endif 6160 } /* else !__kmp_global.t_active */ 6161 TCW_4(__kmp_init_gtid, FALSE); 6162 KMP_MB(); /* Flush all pending memory write invalidates. */ 6163 6164 __kmp_cleanup(); 6165 #if OMPT_SUPPORT 6166 ompt_fini(); 6167 #endif 6168 } 6169 6170 void __kmp_internal_end_library(int gtid_req) { 6171 /* if we have already cleaned up, don't try again, it wouldn't be pretty */ 6172 /* this shouldn't be a race condition because __kmp_internal_end() is the 6173 only place to clear __kmp_serial_init */ 6174 /* we'll check this later too, after we get the lock */ 6175 // 2009-09-06: We do not set g_abort without setting g_done. This check looks 6176 // redundant, because the next check will work in any case. 6177 if (__kmp_global.g.g_abort) { 6178 KA_TRACE(11, ("__kmp_internal_end_library: abort, exiting\n")); 6179 /* TODO abort? */ 6180 return; 6181 } 6182 if (TCR_4(__kmp_global.g.g_done) || !__kmp_init_serial) { 6183 KA_TRACE(10, ("__kmp_internal_end_library: already finished\n")); 6184 return; 6185 } 6186 6187 KMP_MB(); /* Flush all pending memory write invalidates. */ 6188 /* find out who we are and what we should do */ 6189 { 6190 int gtid = (gtid_req >= 0) ? gtid_req : __kmp_gtid_get_specific(); 6191 KA_TRACE( 6192 10, ("__kmp_internal_end_library: enter T#%d (%d)\n", gtid, gtid_req)); 6193 if (gtid == KMP_GTID_SHUTDOWN) { 6194 KA_TRACE(10, ("__kmp_internal_end_library: !__kmp_init_runtime, system " 6195 "already shutdown\n")); 6196 return; 6197 } else if (gtid == KMP_GTID_MONITOR) { 6198 KA_TRACE(10, ("__kmp_internal_end_library: monitor thread, gtid not " 6199 "registered, or system shutdown\n")); 6200 return; 6201 } else if (gtid == KMP_GTID_DNE) { 6202 KA_TRACE(10, ("__kmp_internal_end_library: gtid not registered or system " 6203 "shutdown\n")); 6204 /* we don't know who we are, but we may still shutdown the library */ 6205 } else if (KMP_UBER_GTID(gtid)) { 6206 /* unregister ourselves as an uber thread. gtid is no longer valid */ 6207 if (__kmp_root[gtid]->r.r_active) { 6208 __kmp_global.g.g_abort = -1; 6209 TCW_SYNC_4(__kmp_global.g.g_done, TRUE); 6210 __kmp_unregister_library(); 6211 KA_TRACE(10, 6212 ("__kmp_internal_end_library: root still active, abort T#%d\n", 6213 gtid)); 6214 return; 6215 } else { 6216 KA_TRACE( 6217 10, 6218 ("__kmp_internal_end_library: unregistering sibling T#%d\n", gtid)); 6219 __kmp_unregister_root_current_thread(gtid); 6220 } 6221 } else { 6222 /* worker threads may call this function through the atexit handler, if they 6223 * call exit() */ 6224 /* For now, skip the usual subsequent processing and just dump the debug buffer. 6225 TODO: do a thorough shutdown instead */ 6226 #ifdef DUMP_DEBUG_ON_EXIT 6227 if (__kmp_debug_buf) 6228 __kmp_dump_debug_buffer(); 6229 #endif 6230 // added unregister library call here when we switch to shm linux 6231 // if we don't, it will leave lots of files in /dev/shm 6232 // cleanup shared memory file before exiting. 6233 __kmp_unregister_library(); 6234 return; 6235 } 6236 } 6237 /* synchronize the termination process */ 6238 __kmp_acquire_bootstrap_lock(&__kmp_initz_lock); 6239 6240 /* have we already finished */ 6241 if (__kmp_global.g.g_abort) { 6242 KA_TRACE(10, ("__kmp_internal_end_library: abort, exiting\n")); 6243 /* TODO abort? */ 6244 __kmp_release_bootstrap_lock(&__kmp_initz_lock); 6245 return; 6246 } 6247 if (TCR_4(__kmp_global.g.g_done) || !__kmp_init_serial) { 6248 __kmp_release_bootstrap_lock(&__kmp_initz_lock); 6249 return; 6250 } 6251 6252 /* We need this lock to enforce mutex between this reading of 6253 __kmp_threads_capacity and the writing by __kmp_register_root. 6254 Alternatively, we can use a counter of roots that is atomically updated by 6255 __kmp_get_global_thread_id_reg, __kmp_do_serial_initialize and 6256 __kmp_internal_end_*. */ 6257 __kmp_acquire_bootstrap_lock(&__kmp_forkjoin_lock); 6258 6259 /* now we can safely conduct the actual termination */ 6260 __kmp_internal_end(); 6261 6262 __kmp_release_bootstrap_lock(&__kmp_forkjoin_lock); 6263 __kmp_release_bootstrap_lock(&__kmp_initz_lock); 6264 6265 KA_TRACE(10, ("__kmp_internal_end_library: exit\n")); 6266 6267 #ifdef DUMP_DEBUG_ON_EXIT 6268 if (__kmp_debug_buf) 6269 __kmp_dump_debug_buffer(); 6270 #endif 6271 6272 #if KMP_OS_WINDOWS 6273 __kmp_close_console(); 6274 #endif 6275 6276 __kmp_fini_allocator(); 6277 6278 } // __kmp_internal_end_library 6279 6280 void __kmp_internal_end_thread(int gtid_req) { 6281 int i; 6282 6283 /* if we have already cleaned up, don't try again, it wouldn't be pretty */ 6284 /* this shouldn't be a race condition because __kmp_internal_end() is the 6285 * only place to clear __kmp_serial_init */ 6286 /* we'll check this later too, after we get the lock */ 6287 // 2009-09-06: We do not set g_abort without setting g_done. This check looks 6288 // redundant, because the next check will work in any case. 6289 if (__kmp_global.g.g_abort) { 6290 KA_TRACE(11, ("__kmp_internal_end_thread: abort, exiting\n")); 6291 /* TODO abort? */ 6292 return; 6293 } 6294 if (TCR_4(__kmp_global.g.g_done) || !__kmp_init_serial) { 6295 KA_TRACE(10, ("__kmp_internal_end_thread: already finished\n")); 6296 return; 6297 } 6298 6299 // If hidden helper team has been initialized, we need to deinit it 6300 if (TCR_4(__kmp_init_hidden_helper)) { 6301 TCW_SYNC_4(__kmp_hidden_helper_team_done, TRUE); 6302 // First release the main thread to let it continue its work 6303 __kmp_hidden_helper_main_thread_release(); 6304 // Wait until the hidden helper team has been destroyed 6305 __kmp_hidden_helper_threads_deinitz_wait(); 6306 } 6307 6308 KMP_MB(); /* Flush all pending memory write invalidates. */ 6309 6310 /* find out who we are and what we should do */ 6311 { 6312 int gtid = (gtid_req >= 0) ? gtid_req : __kmp_gtid_get_specific(); 6313 KA_TRACE(10, 6314 ("__kmp_internal_end_thread: enter T#%d (%d)\n", gtid, gtid_req)); 6315 if (gtid == KMP_GTID_SHUTDOWN) { 6316 KA_TRACE(10, ("__kmp_internal_end_thread: !__kmp_init_runtime, system " 6317 "already shutdown\n")); 6318 return; 6319 } else if (gtid == KMP_GTID_MONITOR) { 6320 KA_TRACE(10, ("__kmp_internal_end_thread: monitor thread, gtid not " 6321 "registered, or system shutdown\n")); 6322 return; 6323 } else if (gtid == KMP_GTID_DNE) { 6324 KA_TRACE(10, ("__kmp_internal_end_thread: gtid not registered or system " 6325 "shutdown\n")); 6326 return; 6327 /* we don't know who we are */ 6328 } else if (KMP_UBER_GTID(gtid)) { 6329 /* unregister ourselves as an uber thread. gtid is no longer valid */ 6330 if (__kmp_root[gtid]->r.r_active) { 6331 __kmp_global.g.g_abort = -1; 6332 TCW_SYNC_4(__kmp_global.g.g_done, TRUE); 6333 KA_TRACE(10, 6334 ("__kmp_internal_end_thread: root still active, abort T#%d\n", 6335 gtid)); 6336 return; 6337 } else { 6338 KA_TRACE(10, ("__kmp_internal_end_thread: unregistering sibling T#%d\n", 6339 gtid)); 6340 __kmp_unregister_root_current_thread(gtid); 6341 } 6342 } else { 6343 /* just a worker thread, let's leave */ 6344 KA_TRACE(10, ("__kmp_internal_end_thread: worker thread T#%d\n", gtid)); 6345 6346 if (gtid >= 0) { 6347 __kmp_threads[gtid]->th.th_task_team = NULL; 6348 } 6349 6350 KA_TRACE(10, 6351 ("__kmp_internal_end_thread: worker thread done, exiting T#%d\n", 6352 gtid)); 6353 return; 6354 } 6355 } 6356 #if KMP_DYNAMIC_LIB 6357 if (__kmp_pause_status != kmp_hard_paused) 6358 // AC: lets not shutdown the dynamic library at the exit of uber thread, 6359 // because we will better shutdown later in the library destructor. 6360 { 6361 KA_TRACE(10, ("__kmp_internal_end_thread: exiting T#%d\n", gtid_req)); 6362 return; 6363 } 6364 #endif 6365 /* synchronize the termination process */ 6366 __kmp_acquire_bootstrap_lock(&__kmp_initz_lock); 6367 6368 /* have we already finished */ 6369 if (__kmp_global.g.g_abort) { 6370 KA_TRACE(10, ("__kmp_internal_end_thread: abort, exiting\n")); 6371 /* TODO abort? */ 6372 __kmp_release_bootstrap_lock(&__kmp_initz_lock); 6373 return; 6374 } 6375 if (TCR_4(__kmp_global.g.g_done) || !__kmp_init_serial) { 6376 __kmp_release_bootstrap_lock(&__kmp_initz_lock); 6377 return; 6378 } 6379 6380 /* We need this lock to enforce mutex between this reading of 6381 __kmp_threads_capacity and the writing by __kmp_register_root. 6382 Alternatively, we can use a counter of roots that is atomically updated by 6383 __kmp_get_global_thread_id_reg, __kmp_do_serial_initialize and 6384 __kmp_internal_end_*. */ 6385 6386 /* should we finish the run-time? are all siblings done? */ 6387 __kmp_acquire_bootstrap_lock(&__kmp_forkjoin_lock); 6388 6389 for (i = 0; i < __kmp_threads_capacity; ++i) { 6390 if (KMP_UBER_GTID(i)) { 6391 KA_TRACE( 6392 10, 6393 ("__kmp_internal_end_thread: remaining sibling task: gtid==%d\n", i)); 6394 __kmp_release_bootstrap_lock(&__kmp_forkjoin_lock); 6395 __kmp_release_bootstrap_lock(&__kmp_initz_lock); 6396 return; 6397 } 6398 } 6399 6400 /* now we can safely conduct the actual termination */ 6401 6402 __kmp_internal_end(); 6403 6404 __kmp_release_bootstrap_lock(&__kmp_forkjoin_lock); 6405 __kmp_release_bootstrap_lock(&__kmp_initz_lock); 6406 6407 KA_TRACE(10, ("__kmp_internal_end_thread: exit T#%d\n", gtid_req)); 6408 6409 #ifdef DUMP_DEBUG_ON_EXIT 6410 if (__kmp_debug_buf) 6411 __kmp_dump_debug_buffer(); 6412 #endif 6413 } // __kmp_internal_end_thread 6414 6415 // ----------------------------------------------------------------------------- 6416 // Library registration stuff. 6417 6418 static long __kmp_registration_flag = 0; 6419 // Random value used to indicate library initialization. 6420 static char *__kmp_registration_str = NULL; 6421 // Value to be saved in env var __KMP_REGISTERED_LIB_<pid>. 6422 6423 static inline char *__kmp_reg_status_name() { 6424 /* On RHEL 3u5 if linked statically, getpid() returns different values in 6425 each thread. If registration and unregistration go in different threads 6426 (omp_misc_other_root_exit.cpp test case), the name of registered_lib_env 6427 env var can not be found, because the name will contain different pid. */ 6428 // macOS* complains about name being too long with additional getuid() 6429 #if KMP_OS_UNIX && !KMP_OS_DARWIN && KMP_DYNAMIC_LIB 6430 return __kmp_str_format("__KMP_REGISTERED_LIB_%d_%d", (int)getpid(), 6431 (int)getuid()); 6432 #else 6433 return __kmp_str_format("__KMP_REGISTERED_LIB_%d", (int)getpid()); 6434 #endif 6435 } // __kmp_reg_status_get 6436 6437 void __kmp_register_library_startup(void) { 6438 6439 char *name = __kmp_reg_status_name(); // Name of the environment variable. 6440 int done = 0; 6441 union { 6442 double dtime; 6443 long ltime; 6444 } time; 6445 #if KMP_ARCH_X86 || KMP_ARCH_X86_64 6446 __kmp_initialize_system_tick(); 6447 #endif 6448 __kmp_read_system_time(&time.dtime); 6449 __kmp_registration_flag = 0xCAFE0000L | (time.ltime & 0x0000FFFFL); 6450 __kmp_registration_str = 6451 __kmp_str_format("%p-%lx-%s", &__kmp_registration_flag, 6452 __kmp_registration_flag, KMP_LIBRARY_FILE); 6453 6454 KA_TRACE(50, ("__kmp_register_library_startup: %s=\"%s\"\n", name, 6455 __kmp_registration_str)); 6456 6457 while (!done) { 6458 6459 char *value = NULL; // Actual value of the environment variable. 6460 6461 #if KMP_OS_UNIX && KMP_DYNAMIC_LIB // shared memory is with dynamic library 6462 char *shm_name = __kmp_str_format("/%s", name); 6463 int shm_preexist = 0; 6464 char *data1; 6465 int fd1 = shm_open(shm_name, O_CREAT | O_EXCL | O_RDWR, 0666); 6466 if ((fd1 == -1) && (errno == EEXIST)) { 6467 // file didn't open because it already exists. 6468 // try opening existing file 6469 fd1 = shm_open(shm_name, O_RDWR, 0666); 6470 if (fd1 == -1) { // file didn't open 6471 // error out here 6472 __kmp_fatal(KMP_MSG(FunctionError, "Can't open SHM"), KMP_ERR(0), 6473 __kmp_msg_null); 6474 } else { 6475 // able to open existing file 6476 shm_preexist = 1; 6477 } 6478 } else if (fd1 == -1) { // SHM didn't open; it was due to error other than 6479 // already exists. 6480 // error out here. 6481 __kmp_fatal(KMP_MSG(FunctionError, "Can't open SHM2"), KMP_ERR(errno), 6482 __kmp_msg_null); 6483 } 6484 if (shm_preexist == 0) { 6485 // we created SHM now set size 6486 if (ftruncate(fd1, SHM_SIZE) == -1) { 6487 // error occured setting size; 6488 __kmp_fatal(KMP_MSG(FunctionError, "Can't set size of SHM"), 6489 KMP_ERR(errno), __kmp_msg_null); 6490 } 6491 } 6492 data1 = 6493 (char *)mmap(0, SHM_SIZE, PROT_READ | PROT_WRITE, MAP_SHARED, fd1, 0); 6494 if (data1 == MAP_FAILED) { 6495 // failed to map shared memory 6496 __kmp_fatal(KMP_MSG(FunctionError, "Can't map SHM"), KMP_ERR(errno), 6497 __kmp_msg_null); 6498 } 6499 if (shm_preexist == 0) { // set data to SHM, set value 6500 KMP_STRCPY_S(data1, SHM_SIZE, __kmp_registration_str); 6501 } 6502 // Read value from either what we just wrote or existing file. 6503 value = __kmp_str_format("%s", data1); // read value from SHM 6504 munmap(data1, SHM_SIZE); 6505 close(fd1); 6506 #else // Windows and unix with static library 6507 // Set environment variable, but do not overwrite if it is exist. 6508 __kmp_env_set(name, __kmp_registration_str, 0); 6509 // read value to see if it got set 6510 value = __kmp_env_get(name); 6511 #endif 6512 6513 if (value != NULL && strcmp(value, __kmp_registration_str) == 0) { 6514 done = 1; // Ok, environment variable set successfully, exit the loop. 6515 } else { 6516 // Oops. Write failed. Another copy of OpenMP RTL is in memory. 6517 // Check whether it alive or dead. 6518 int neighbor = 0; // 0 -- unknown status, 1 -- alive, 2 -- dead. 6519 char *tail = value; 6520 char *flag_addr_str = NULL; 6521 char *flag_val_str = NULL; 6522 char const *file_name = NULL; 6523 __kmp_str_split(tail, '-', &flag_addr_str, &tail); 6524 __kmp_str_split(tail, '-', &flag_val_str, &tail); 6525 file_name = tail; 6526 if (tail != NULL) { 6527 long *flag_addr = 0; 6528 long flag_val = 0; 6529 KMP_SSCANF(flag_addr_str, "%p", RCAST(void**, &flag_addr)); 6530 KMP_SSCANF(flag_val_str, "%lx", &flag_val); 6531 if (flag_addr != 0 && flag_val != 0 && strcmp(file_name, "") != 0) { 6532 // First, check whether environment-encoded address is mapped into 6533 // addr space. 6534 // If so, dereference it to see if it still has the right value. 6535 if (__kmp_is_address_mapped(flag_addr) && *flag_addr == flag_val) { 6536 neighbor = 1; 6537 } else { 6538 // If not, then we know the other copy of the library is no longer 6539 // running. 6540 neighbor = 2; 6541 } 6542 } 6543 } 6544 switch (neighbor) { 6545 case 0: // Cannot parse environment variable -- neighbor status unknown. 6546 // Assume it is the incompatible format of future version of the 6547 // library. Assume the other library is alive. 6548 // WARN( ... ); // TODO: Issue a warning. 6549 file_name = "unknown library"; 6550 KMP_FALLTHROUGH(); 6551 // Attention! Falling to the next case. That's intentional. 6552 case 1: { // Neighbor is alive. 6553 // Check it is allowed. 6554 char *duplicate_ok = __kmp_env_get("KMP_DUPLICATE_LIB_OK"); 6555 if (!__kmp_str_match_true(duplicate_ok)) { 6556 // That's not allowed. Issue fatal error. 6557 __kmp_fatal(KMP_MSG(DuplicateLibrary, KMP_LIBRARY_FILE, file_name), 6558 KMP_HNT(DuplicateLibrary), __kmp_msg_null); 6559 } 6560 KMP_INTERNAL_FREE(duplicate_ok); 6561 __kmp_duplicate_library_ok = 1; 6562 done = 1; // Exit the loop. 6563 } break; 6564 case 2: { // Neighbor is dead. 6565 6566 #if KMP_OS_UNIX && KMP_DYNAMIC_LIB // shared memory is with dynamic library 6567 // close shared memory. 6568 shm_unlink(shm_name); // this removes file in /dev/shm 6569 #else 6570 // Clear the variable and try to register library again. 6571 __kmp_env_unset(name); 6572 #endif 6573 } break; 6574 default: { KMP_DEBUG_ASSERT(0); } break; 6575 } 6576 } 6577 KMP_INTERNAL_FREE((void *)value); 6578 #if KMP_OS_UNIX && KMP_DYNAMIC_LIB // shared memory is with dynamic library 6579 KMP_INTERNAL_FREE((void *)shm_name); 6580 #endif 6581 } // while 6582 KMP_INTERNAL_FREE((void *)name); 6583 6584 } // func __kmp_register_library_startup 6585 6586 void __kmp_unregister_library(void) { 6587 6588 char *name = __kmp_reg_status_name(); 6589 char *value = NULL; 6590 6591 #if KMP_OS_UNIX && KMP_DYNAMIC_LIB // shared memory is with dynamic library 6592 char *shm_name = __kmp_str_format("/%s", name); 6593 int fd1 = shm_open(shm_name, O_RDONLY, 0666); 6594 if (fd1 == -1) { 6595 // file did not open. return. 6596 return; 6597 } 6598 char *data1 = (char *)mmap(0, SHM_SIZE, PROT_READ, MAP_SHARED, fd1, 0); 6599 if (data1 != MAP_FAILED) { 6600 value = __kmp_str_format("%s", data1); // read value from SHM 6601 munmap(data1, SHM_SIZE); 6602 } 6603 close(fd1); 6604 #else 6605 value = __kmp_env_get(name); 6606 #endif 6607 6608 KMP_DEBUG_ASSERT(__kmp_registration_flag != 0); 6609 KMP_DEBUG_ASSERT(__kmp_registration_str != NULL); 6610 if (value != NULL && strcmp(value, __kmp_registration_str) == 0) { 6611 // Ok, this is our variable. Delete it. 6612 #if KMP_OS_UNIX && KMP_DYNAMIC_LIB // shared memory is with dynamic library 6613 shm_unlink(shm_name); // this removes file in /dev/shm 6614 #else 6615 __kmp_env_unset(name); 6616 #endif 6617 } 6618 6619 #if KMP_OS_UNIX && KMP_DYNAMIC_LIB // shared memory is with dynamic library 6620 KMP_INTERNAL_FREE(shm_name); 6621 #endif 6622 6623 KMP_INTERNAL_FREE(__kmp_registration_str); 6624 KMP_INTERNAL_FREE(value); 6625 KMP_INTERNAL_FREE(name); 6626 6627 __kmp_registration_flag = 0; 6628 __kmp_registration_str = NULL; 6629 6630 } // __kmp_unregister_library 6631 6632 // End of Library registration stuff. 6633 // ----------------------------------------------------------------------------- 6634 6635 #if KMP_MIC_SUPPORTED 6636 6637 static void __kmp_check_mic_type() { 6638 kmp_cpuid_t cpuid_state = {0}; 6639 kmp_cpuid_t *cs_p = &cpuid_state; 6640 __kmp_x86_cpuid(1, 0, cs_p); 6641 // We don't support mic1 at the moment 6642 if ((cs_p->eax & 0xff0) == 0xB10) { 6643 __kmp_mic_type = mic2; 6644 } else if ((cs_p->eax & 0xf0ff0) == 0x50670) { 6645 __kmp_mic_type = mic3; 6646 } else { 6647 __kmp_mic_type = non_mic; 6648 } 6649 } 6650 6651 #endif /* KMP_MIC_SUPPORTED */ 6652 6653 #if KMP_HAVE_UMWAIT 6654 static void __kmp_user_level_mwait_init() { 6655 struct kmp_cpuid buf; 6656 __kmp_x86_cpuid(7, 0, &buf); 6657 __kmp_umwait_enabled = ((buf.ecx >> 5) & 1) && __kmp_user_level_mwait; 6658 KF_TRACE(30, ("__kmp_user_level_mwait_init: __kmp_umwait_enabled = %d\n", 6659 __kmp_umwait_enabled)); 6660 } 6661 #elif KMP_HAVE_MWAIT 6662 #ifndef AT_INTELPHIUSERMWAIT 6663 // Spurious, non-existent value that should always fail to return anything. 6664 // Will be replaced with the correct value when we know that. 6665 #define AT_INTELPHIUSERMWAIT 10000 6666 #endif 6667 // getauxval() function is available in RHEL7 and SLES12. If a system with an 6668 // earlier OS is used to build the RTL, we'll use the following internal 6669 // function when the entry is not found. 6670 unsigned long getauxval(unsigned long) KMP_WEAK_ATTRIBUTE_EXTERNAL; 6671 unsigned long getauxval(unsigned long) { return 0; } 6672 6673 static void __kmp_user_level_mwait_init() { 6674 // When getauxval() and correct value of AT_INTELPHIUSERMWAIT are available 6675 // use them to find if the user-level mwait is enabled. Otherwise, forcibly 6676 // set __kmp_mwait_enabled=TRUE on Intel MIC if the environment variable 6677 // KMP_USER_LEVEL_MWAIT was set to TRUE. 6678 if (__kmp_mic_type == mic3) { 6679 unsigned long res = getauxval(AT_INTELPHIUSERMWAIT); 6680 if ((res & 0x1) || __kmp_user_level_mwait) { 6681 __kmp_mwait_enabled = TRUE; 6682 if (__kmp_user_level_mwait) { 6683 KMP_INFORM(EnvMwaitWarn); 6684 } 6685 } else { 6686 __kmp_mwait_enabled = FALSE; 6687 } 6688 } 6689 KF_TRACE(30, ("__kmp_user_level_mwait_init: __kmp_mic_type = %d, " 6690 "__kmp_mwait_enabled = %d\n", 6691 __kmp_mic_type, __kmp_mwait_enabled)); 6692 } 6693 #endif /* KMP_HAVE_UMWAIT */ 6694 6695 static void __kmp_do_serial_initialize(void) { 6696 int i, gtid; 6697 size_t size; 6698 6699 KA_TRACE(10, ("__kmp_do_serial_initialize: enter\n")); 6700 6701 KMP_DEBUG_ASSERT(sizeof(kmp_int32) == 4); 6702 KMP_DEBUG_ASSERT(sizeof(kmp_uint32) == 4); 6703 KMP_DEBUG_ASSERT(sizeof(kmp_int64) == 8); 6704 KMP_DEBUG_ASSERT(sizeof(kmp_uint64) == 8); 6705 KMP_DEBUG_ASSERT(sizeof(kmp_intptr_t) == sizeof(void *)); 6706 6707 #if OMPT_SUPPORT 6708 ompt_pre_init(); 6709 #endif 6710 6711 __kmp_validate_locks(); 6712 6713 /* Initialize internal memory allocator */ 6714 __kmp_init_allocator(); 6715 6716 /* Register the library startup via an environment variable and check to see 6717 whether another copy of the library is already registered. */ 6718 6719 __kmp_register_library_startup(); 6720 6721 /* TODO reinitialization of library */ 6722 if (TCR_4(__kmp_global.g.g_done)) { 6723 KA_TRACE(10, ("__kmp_do_serial_initialize: reinitialization of library\n")); 6724 } 6725 6726 __kmp_global.g.g_abort = 0; 6727 TCW_SYNC_4(__kmp_global.g.g_done, FALSE); 6728 6729 /* initialize the locks */ 6730 #if KMP_USE_ADAPTIVE_LOCKS 6731 #if KMP_DEBUG_ADAPTIVE_LOCKS 6732 __kmp_init_speculative_stats(); 6733 #endif 6734 #endif 6735 #if KMP_STATS_ENABLED 6736 __kmp_stats_init(); 6737 #endif 6738 __kmp_init_lock(&__kmp_global_lock); 6739 __kmp_init_queuing_lock(&__kmp_dispatch_lock); 6740 __kmp_init_lock(&__kmp_debug_lock); 6741 __kmp_init_atomic_lock(&__kmp_atomic_lock); 6742 __kmp_init_atomic_lock(&__kmp_atomic_lock_1i); 6743 __kmp_init_atomic_lock(&__kmp_atomic_lock_2i); 6744 __kmp_init_atomic_lock(&__kmp_atomic_lock_4i); 6745 __kmp_init_atomic_lock(&__kmp_atomic_lock_4r); 6746 __kmp_init_atomic_lock(&__kmp_atomic_lock_8i); 6747 __kmp_init_atomic_lock(&__kmp_atomic_lock_8r); 6748 __kmp_init_atomic_lock(&__kmp_atomic_lock_8c); 6749 __kmp_init_atomic_lock(&__kmp_atomic_lock_10r); 6750 __kmp_init_atomic_lock(&__kmp_atomic_lock_16r); 6751 __kmp_init_atomic_lock(&__kmp_atomic_lock_16c); 6752 __kmp_init_atomic_lock(&__kmp_atomic_lock_20c); 6753 __kmp_init_atomic_lock(&__kmp_atomic_lock_32c); 6754 __kmp_init_bootstrap_lock(&__kmp_forkjoin_lock); 6755 __kmp_init_bootstrap_lock(&__kmp_exit_lock); 6756 #if KMP_USE_MONITOR 6757 __kmp_init_bootstrap_lock(&__kmp_monitor_lock); 6758 #endif 6759 __kmp_init_bootstrap_lock(&__kmp_tp_cached_lock); 6760 6761 /* conduct initialization and initial setup of configuration */ 6762 6763 __kmp_runtime_initialize(); 6764 6765 #if KMP_MIC_SUPPORTED 6766 __kmp_check_mic_type(); 6767 #endif 6768 6769 // Some global variable initialization moved here from kmp_env_initialize() 6770 #ifdef KMP_DEBUG 6771 kmp_diag = 0; 6772 #endif 6773 __kmp_abort_delay = 0; 6774 6775 // From __kmp_init_dflt_team_nth() 6776 /* assume the entire machine will be used */ 6777 __kmp_dflt_team_nth_ub = __kmp_xproc; 6778 if (__kmp_dflt_team_nth_ub < KMP_MIN_NTH) { 6779 __kmp_dflt_team_nth_ub = KMP_MIN_NTH; 6780 } 6781 if (__kmp_dflt_team_nth_ub > __kmp_sys_max_nth) { 6782 __kmp_dflt_team_nth_ub = __kmp_sys_max_nth; 6783 } 6784 __kmp_max_nth = __kmp_sys_max_nth; 6785 __kmp_cg_max_nth = __kmp_sys_max_nth; 6786 __kmp_teams_max_nth = __kmp_xproc; // set a "reasonable" default 6787 if (__kmp_teams_max_nth > __kmp_sys_max_nth) { 6788 __kmp_teams_max_nth = __kmp_sys_max_nth; 6789 } 6790 6791 // Three vars below moved here from __kmp_env_initialize() "KMP_BLOCKTIME" 6792 // part 6793 __kmp_dflt_blocktime = KMP_DEFAULT_BLOCKTIME; 6794 #if KMP_USE_MONITOR 6795 __kmp_monitor_wakeups = 6796 KMP_WAKEUPS_FROM_BLOCKTIME(__kmp_dflt_blocktime, __kmp_monitor_wakeups); 6797 __kmp_bt_intervals = 6798 KMP_INTERVALS_FROM_BLOCKTIME(__kmp_dflt_blocktime, __kmp_monitor_wakeups); 6799 #endif 6800 // From "KMP_LIBRARY" part of __kmp_env_initialize() 6801 __kmp_library = library_throughput; 6802 // From KMP_SCHEDULE initialization 6803 __kmp_static = kmp_sch_static_balanced; 6804 // AC: do not use analytical here, because it is non-monotonous 6805 //__kmp_guided = kmp_sch_guided_iterative_chunked; 6806 //__kmp_auto = kmp_sch_guided_analytical_chunked; // AC: it is the default, no 6807 // need to repeat assignment 6808 // Barrier initialization. Moved here from __kmp_env_initialize() Barrier branch 6809 // bit control and barrier method control parts 6810 #if KMP_FAST_REDUCTION_BARRIER 6811 #define kmp_reduction_barrier_gather_bb ((int)1) 6812 #define kmp_reduction_barrier_release_bb ((int)1) 6813 #define kmp_reduction_barrier_gather_pat bp_hyper_bar 6814 #define kmp_reduction_barrier_release_pat bp_hyper_bar 6815 #endif // KMP_FAST_REDUCTION_BARRIER 6816 for (i = bs_plain_barrier; i < bs_last_barrier; i++) { 6817 __kmp_barrier_gather_branch_bits[i] = __kmp_barrier_gather_bb_dflt; 6818 __kmp_barrier_release_branch_bits[i] = __kmp_barrier_release_bb_dflt; 6819 __kmp_barrier_gather_pattern[i] = __kmp_barrier_gather_pat_dflt; 6820 __kmp_barrier_release_pattern[i] = __kmp_barrier_release_pat_dflt; 6821 #if KMP_FAST_REDUCTION_BARRIER 6822 if (i == bs_reduction_barrier) { // tested and confirmed on ALTIX only ( 6823 // lin_64 ): hyper,1 6824 __kmp_barrier_gather_branch_bits[i] = kmp_reduction_barrier_gather_bb; 6825 __kmp_barrier_release_branch_bits[i] = kmp_reduction_barrier_release_bb; 6826 __kmp_barrier_gather_pattern[i] = kmp_reduction_barrier_gather_pat; 6827 __kmp_barrier_release_pattern[i] = kmp_reduction_barrier_release_pat; 6828 } 6829 #endif // KMP_FAST_REDUCTION_BARRIER 6830 } 6831 #if KMP_FAST_REDUCTION_BARRIER 6832 #undef kmp_reduction_barrier_release_pat 6833 #undef kmp_reduction_barrier_gather_pat 6834 #undef kmp_reduction_barrier_release_bb 6835 #undef kmp_reduction_barrier_gather_bb 6836 #endif // KMP_FAST_REDUCTION_BARRIER 6837 #if KMP_MIC_SUPPORTED 6838 if (__kmp_mic_type == mic2) { // KNC 6839 // AC: plane=3,2, forkjoin=2,1 are optimal for 240 threads on KNC 6840 __kmp_barrier_gather_branch_bits[bs_plain_barrier] = 3; // plain gather 6841 __kmp_barrier_release_branch_bits[bs_forkjoin_barrier] = 6842 1; // forkjoin release 6843 __kmp_barrier_gather_pattern[bs_forkjoin_barrier] = bp_hierarchical_bar; 6844 __kmp_barrier_release_pattern[bs_forkjoin_barrier] = bp_hierarchical_bar; 6845 } 6846 #if KMP_FAST_REDUCTION_BARRIER 6847 if (__kmp_mic_type == mic2) { // KNC 6848 __kmp_barrier_gather_pattern[bs_reduction_barrier] = bp_hierarchical_bar; 6849 __kmp_barrier_release_pattern[bs_reduction_barrier] = bp_hierarchical_bar; 6850 } 6851 #endif // KMP_FAST_REDUCTION_BARRIER 6852 #endif // KMP_MIC_SUPPORTED 6853 6854 // From KMP_CHECKS initialization 6855 #ifdef KMP_DEBUG 6856 __kmp_env_checks = TRUE; /* development versions have the extra checks */ 6857 #else 6858 __kmp_env_checks = FALSE; /* port versions do not have the extra checks */ 6859 #endif 6860 6861 // From "KMP_FOREIGN_THREADS_THREADPRIVATE" initialization 6862 __kmp_foreign_tp = TRUE; 6863 6864 __kmp_global.g.g_dynamic = FALSE; 6865 __kmp_global.g.g_dynamic_mode = dynamic_default; 6866 6867 __kmp_env_initialize(NULL); 6868 6869 #if KMP_HAVE_MWAIT || KMP_HAVE_UMWAIT 6870 __kmp_user_level_mwait_init(); 6871 #endif 6872 // Print all messages in message catalog for testing purposes. 6873 #ifdef KMP_DEBUG 6874 char const *val = __kmp_env_get("KMP_DUMP_CATALOG"); 6875 if (__kmp_str_match_true(val)) { 6876 kmp_str_buf_t buffer; 6877 __kmp_str_buf_init(&buffer); 6878 __kmp_i18n_dump_catalog(&buffer); 6879 __kmp_printf("%s", buffer.str); 6880 __kmp_str_buf_free(&buffer); 6881 } 6882 __kmp_env_free(&val); 6883 #endif 6884 6885 __kmp_threads_capacity = 6886 __kmp_initial_threads_capacity(__kmp_dflt_team_nth_ub); 6887 // Moved here from __kmp_env_initialize() "KMP_ALL_THREADPRIVATE" part 6888 __kmp_tp_capacity = __kmp_default_tp_capacity( 6889 __kmp_dflt_team_nth_ub, __kmp_max_nth, __kmp_allThreadsSpecified); 6890 6891 // If the library is shut down properly, both pools must be NULL. Just in 6892 // case, set them to NULL -- some memory may leak, but subsequent code will 6893 // work even if pools are not freed. 6894 KMP_DEBUG_ASSERT(__kmp_thread_pool == NULL); 6895 KMP_DEBUG_ASSERT(__kmp_thread_pool_insert_pt == NULL); 6896 KMP_DEBUG_ASSERT(__kmp_team_pool == NULL); 6897 __kmp_thread_pool = NULL; 6898 __kmp_thread_pool_insert_pt = NULL; 6899 __kmp_team_pool = NULL; 6900 6901 /* Allocate all of the variable sized records */ 6902 /* NOTE: __kmp_threads_capacity entries are allocated, but the arrays are 6903 * expandable */ 6904 /* Since allocation is cache-aligned, just add extra padding at the end */ 6905 size = 6906 (sizeof(kmp_info_t *) + sizeof(kmp_root_t *)) * __kmp_threads_capacity + 6907 CACHE_LINE; 6908 __kmp_threads = (kmp_info_t **)__kmp_allocate(size); 6909 __kmp_root = (kmp_root_t **)((char *)__kmp_threads + 6910 sizeof(kmp_info_t *) * __kmp_threads_capacity); 6911 6912 /* init thread counts */ 6913 KMP_DEBUG_ASSERT(__kmp_all_nth == 6914 0); // Asserts fail if the library is reinitializing and 6915 KMP_DEBUG_ASSERT(__kmp_nth == 0); // something was wrong in termination. 6916 __kmp_all_nth = 0; 6917 __kmp_nth = 0; 6918 6919 /* setup the uber master thread and hierarchy */ 6920 gtid = __kmp_register_root(TRUE); 6921 KA_TRACE(10, ("__kmp_do_serial_initialize T#%d\n", gtid)); 6922 KMP_ASSERT(KMP_UBER_GTID(gtid)); 6923 KMP_ASSERT(KMP_INITIAL_GTID(gtid)); 6924 6925 KMP_MB(); /* Flush all pending memory write invalidates. */ 6926 6927 __kmp_common_initialize(); 6928 6929 #if KMP_OS_UNIX 6930 /* invoke the child fork handler */ 6931 __kmp_register_atfork(); 6932 #endif 6933 6934 #if !KMP_DYNAMIC_LIB 6935 { 6936 /* Invoke the exit handler when the program finishes, only for static 6937 library. For dynamic library, we already have _fini and DllMain. */ 6938 int rc = atexit(__kmp_internal_end_atexit); 6939 if (rc != 0) { 6940 __kmp_fatal(KMP_MSG(FunctionError, "atexit()"), KMP_ERR(rc), 6941 __kmp_msg_null); 6942 } 6943 } 6944 #endif 6945 6946 #if KMP_HANDLE_SIGNALS 6947 #if KMP_OS_UNIX 6948 /* NOTE: make sure that this is called before the user installs their own 6949 signal handlers so that the user handlers are called first. this way they 6950 can return false, not call our handler, avoid terminating the library, and 6951 continue execution where they left off. */ 6952 __kmp_install_signals(FALSE); 6953 #endif /* KMP_OS_UNIX */ 6954 #if KMP_OS_WINDOWS 6955 __kmp_install_signals(TRUE); 6956 #endif /* KMP_OS_WINDOWS */ 6957 #endif 6958 6959 /* we have finished the serial initialization */ 6960 __kmp_init_counter++; 6961 6962 __kmp_init_serial = TRUE; 6963 6964 if (__kmp_settings) { 6965 __kmp_env_print(); 6966 } 6967 6968 if (__kmp_display_env || __kmp_display_env_verbose) { 6969 __kmp_env_print_2(); 6970 } 6971 6972 #if OMPT_SUPPORT 6973 ompt_post_init(); 6974 #endif 6975 6976 KMP_MB(); 6977 6978 KA_TRACE(10, ("__kmp_do_serial_initialize: exit\n")); 6979 } 6980 6981 void __kmp_serial_initialize(void) { 6982 if (__kmp_init_serial) { 6983 return; 6984 } 6985 __kmp_acquire_bootstrap_lock(&__kmp_initz_lock); 6986 if (__kmp_init_serial) { 6987 __kmp_release_bootstrap_lock(&__kmp_initz_lock); 6988 return; 6989 } 6990 __kmp_do_serial_initialize(); 6991 __kmp_release_bootstrap_lock(&__kmp_initz_lock); 6992 } 6993 6994 static void __kmp_do_middle_initialize(void) { 6995 int i, j; 6996 int prev_dflt_team_nth; 6997 6998 if (!__kmp_init_serial) { 6999 __kmp_do_serial_initialize(); 7000 } 7001 7002 KA_TRACE(10, ("__kmp_middle_initialize: enter\n")); 7003 7004 // Save the previous value for the __kmp_dflt_team_nth so that 7005 // we can avoid some reinitialization if it hasn't changed. 7006 prev_dflt_team_nth = __kmp_dflt_team_nth; 7007 7008 #if KMP_AFFINITY_SUPPORTED 7009 // __kmp_affinity_initialize() will try to set __kmp_ncores to the 7010 // number of cores on the machine. 7011 __kmp_affinity_initialize(); 7012 7013 // Run through the __kmp_threads array and set the affinity mask 7014 // for each root thread that is currently registered with the RTL. 7015 for (i = 0; i < __kmp_threads_capacity; i++) { 7016 if (TCR_PTR(__kmp_threads[i]) != NULL) { 7017 __kmp_affinity_set_init_mask(i, TRUE); 7018 } 7019 } 7020 #endif /* KMP_AFFINITY_SUPPORTED */ 7021 7022 KMP_ASSERT(__kmp_xproc > 0); 7023 if (__kmp_avail_proc == 0) { 7024 __kmp_avail_proc = __kmp_xproc; 7025 } 7026 7027 // If there were empty places in num_threads list (OMP_NUM_THREADS=,,2,3), 7028 // correct them now 7029 j = 0; 7030 while ((j < __kmp_nested_nth.used) && !__kmp_nested_nth.nth[j]) { 7031 __kmp_nested_nth.nth[j] = __kmp_dflt_team_nth = __kmp_dflt_team_nth_ub = 7032 __kmp_avail_proc; 7033 j++; 7034 } 7035 7036 if (__kmp_dflt_team_nth == 0) { 7037 #ifdef KMP_DFLT_NTH_CORES 7038 // Default #threads = #cores 7039 __kmp_dflt_team_nth = __kmp_ncores; 7040 KA_TRACE(20, ("__kmp_middle_initialize: setting __kmp_dflt_team_nth = " 7041 "__kmp_ncores (%d)\n", 7042 __kmp_dflt_team_nth)); 7043 #else 7044 // Default #threads = #available OS procs 7045 __kmp_dflt_team_nth = __kmp_avail_proc; 7046 KA_TRACE(20, ("__kmp_middle_initialize: setting __kmp_dflt_team_nth = " 7047 "__kmp_avail_proc(%d)\n", 7048 __kmp_dflt_team_nth)); 7049 #endif /* KMP_DFLT_NTH_CORES */ 7050 } 7051 7052 if (__kmp_dflt_team_nth < KMP_MIN_NTH) { 7053 __kmp_dflt_team_nth = KMP_MIN_NTH; 7054 } 7055 if (__kmp_dflt_team_nth > __kmp_sys_max_nth) { 7056 __kmp_dflt_team_nth = __kmp_sys_max_nth; 7057 } 7058 7059 // There's no harm in continuing if the following check fails, 7060 // but it indicates an error in the previous logic. 7061 KMP_DEBUG_ASSERT(__kmp_dflt_team_nth <= __kmp_dflt_team_nth_ub); 7062 7063 if (__kmp_dflt_team_nth != prev_dflt_team_nth) { 7064 // Run through the __kmp_threads array and set the num threads icv for each 7065 // root thread that is currently registered with the RTL (which has not 7066 // already explicitly set its nthreads-var with a call to 7067 // omp_set_num_threads()). 7068 for (i = 0; i < __kmp_threads_capacity; i++) { 7069 kmp_info_t *thread = __kmp_threads[i]; 7070 if (thread == NULL) 7071 continue; 7072 if (thread->th.th_current_task->td_icvs.nproc != 0) 7073 continue; 7074 7075 set__nproc(__kmp_threads[i], __kmp_dflt_team_nth); 7076 } 7077 } 7078 KA_TRACE( 7079 20, 7080 ("__kmp_middle_initialize: final value for __kmp_dflt_team_nth = %d\n", 7081 __kmp_dflt_team_nth)); 7082 7083 #ifdef KMP_ADJUST_BLOCKTIME 7084 /* Adjust blocktime to zero if necessary now that __kmp_avail_proc is set */ 7085 if (!__kmp_env_blocktime && (__kmp_avail_proc > 0)) { 7086 KMP_DEBUG_ASSERT(__kmp_avail_proc > 0); 7087 if (__kmp_nth > __kmp_avail_proc) { 7088 __kmp_zero_bt = TRUE; 7089 } 7090 } 7091 #endif /* KMP_ADJUST_BLOCKTIME */ 7092 7093 /* we have finished middle initialization */ 7094 TCW_SYNC_4(__kmp_init_middle, TRUE); 7095 7096 KA_TRACE(10, ("__kmp_do_middle_initialize: exit\n")); 7097 } 7098 7099 void __kmp_middle_initialize(void) { 7100 if (__kmp_init_middle) { 7101 return; 7102 } 7103 __kmp_acquire_bootstrap_lock(&__kmp_initz_lock); 7104 if (__kmp_init_middle) { 7105 __kmp_release_bootstrap_lock(&__kmp_initz_lock); 7106 return; 7107 } 7108 __kmp_do_middle_initialize(); 7109 __kmp_release_bootstrap_lock(&__kmp_initz_lock); 7110 } 7111 7112 void __kmp_parallel_initialize(void) { 7113 int gtid = __kmp_entry_gtid(); // this might be a new root 7114 7115 /* synchronize parallel initialization (for sibling) */ 7116 if (TCR_4(__kmp_init_parallel)) 7117 return; 7118 __kmp_acquire_bootstrap_lock(&__kmp_initz_lock); 7119 if (TCR_4(__kmp_init_parallel)) { 7120 __kmp_release_bootstrap_lock(&__kmp_initz_lock); 7121 return; 7122 } 7123 7124 /* TODO reinitialization after we have already shut down */ 7125 if (TCR_4(__kmp_global.g.g_done)) { 7126 KA_TRACE( 7127 10, 7128 ("__kmp_parallel_initialize: attempt to init while shutting down\n")); 7129 __kmp_infinite_loop(); 7130 } 7131 7132 /* jc: The lock __kmp_initz_lock is already held, so calling 7133 __kmp_serial_initialize would cause a deadlock. So we call 7134 __kmp_do_serial_initialize directly. */ 7135 if (!__kmp_init_middle) { 7136 __kmp_do_middle_initialize(); 7137 } 7138 __kmp_resume_if_hard_paused(); 7139 7140 /* begin initialization */ 7141 KA_TRACE(10, ("__kmp_parallel_initialize: enter\n")); 7142 KMP_ASSERT(KMP_UBER_GTID(gtid)); 7143 7144 #if KMP_ARCH_X86 || KMP_ARCH_X86_64 7145 // Save the FP control regs. 7146 // Worker threads will set theirs to these values at thread startup. 7147 __kmp_store_x87_fpu_control_word(&__kmp_init_x87_fpu_control_word); 7148 __kmp_store_mxcsr(&__kmp_init_mxcsr); 7149 __kmp_init_mxcsr &= KMP_X86_MXCSR_MASK; 7150 #endif /* KMP_ARCH_X86 || KMP_ARCH_X86_64 */ 7151 7152 #if KMP_OS_UNIX 7153 #if KMP_HANDLE_SIGNALS 7154 /* must be after __kmp_serial_initialize */ 7155 __kmp_install_signals(TRUE); 7156 #endif 7157 #endif 7158 7159 __kmp_suspend_initialize(); 7160 7161 #if defined(USE_LOAD_BALANCE) 7162 if (__kmp_global.g.g_dynamic_mode == dynamic_default) { 7163 __kmp_global.g.g_dynamic_mode = dynamic_load_balance; 7164 } 7165 #else 7166 if (__kmp_global.g.g_dynamic_mode == dynamic_default) { 7167 __kmp_global.g.g_dynamic_mode = dynamic_thread_limit; 7168 } 7169 #endif 7170 7171 if (__kmp_version) { 7172 __kmp_print_version_2(); 7173 } 7174 7175 /* we have finished parallel initialization */ 7176 TCW_SYNC_4(__kmp_init_parallel, TRUE); 7177 7178 KMP_MB(); 7179 KA_TRACE(10, ("__kmp_parallel_initialize: exit\n")); 7180 7181 __kmp_release_bootstrap_lock(&__kmp_initz_lock); 7182 } 7183 7184 void __kmp_hidden_helper_initialize() { 7185 if (TCR_4(__kmp_init_hidden_helper)) 7186 return; 7187 7188 // __kmp_parallel_initialize is required before we initialize hidden helper 7189 if (!TCR_4(__kmp_init_parallel)) 7190 __kmp_parallel_initialize(); 7191 7192 // Double check. Note that this double check should not be placed before 7193 // __kmp_parallel_initialize as it will cause dead lock. 7194 __kmp_acquire_bootstrap_lock(&__kmp_initz_lock); 7195 if (TCR_4(__kmp_init_hidden_helper)) { 7196 __kmp_release_bootstrap_lock(&__kmp_initz_lock); 7197 return; 7198 } 7199 7200 // Set the count of hidden helper tasks to be executed to zero 7201 KMP_ATOMIC_ST_REL(&__kmp_unexecuted_hidden_helper_tasks, 0); 7202 7203 // Set the global variable indicating that we're initializing hidden helper 7204 // team/threads 7205 TCW_SYNC_4(__kmp_init_hidden_helper_threads, TRUE); 7206 7207 // Platform independent initialization 7208 __kmp_do_initialize_hidden_helper_threads(); 7209 7210 // Wait here for the finish of initialization of hidden helper teams 7211 __kmp_hidden_helper_threads_initz_wait(); 7212 7213 // We have finished hidden helper initialization 7214 TCW_SYNC_4(__kmp_init_hidden_helper, TRUE); 7215 7216 __kmp_release_bootstrap_lock(&__kmp_initz_lock); 7217 } 7218 7219 /* ------------------------------------------------------------------------ */ 7220 7221 void __kmp_run_before_invoked_task(int gtid, int tid, kmp_info_t *this_thr, 7222 kmp_team_t *team) { 7223 kmp_disp_t *dispatch; 7224 7225 KMP_MB(); 7226 7227 /* none of the threads have encountered any constructs, yet. */ 7228 this_thr->th.th_local.this_construct = 0; 7229 #if KMP_CACHE_MANAGE 7230 KMP_CACHE_PREFETCH(&this_thr->th.th_bar[bs_forkjoin_barrier].bb.b_arrived); 7231 #endif /* KMP_CACHE_MANAGE */ 7232 dispatch = (kmp_disp_t *)TCR_PTR(this_thr->th.th_dispatch); 7233 KMP_DEBUG_ASSERT(dispatch); 7234 KMP_DEBUG_ASSERT(team->t.t_dispatch); 7235 // KMP_DEBUG_ASSERT( this_thr->th.th_dispatch == &team->t.t_dispatch[ 7236 // this_thr->th.th_info.ds.ds_tid ] ); 7237 7238 dispatch->th_disp_index = 0; /* reset the dispatch buffer counter */ 7239 dispatch->th_doacross_buf_idx = 0; // reset doacross dispatch buffer counter 7240 if (__kmp_env_consistency_check) 7241 __kmp_push_parallel(gtid, team->t.t_ident); 7242 7243 KMP_MB(); /* Flush all pending memory write invalidates. */ 7244 } 7245 7246 void __kmp_run_after_invoked_task(int gtid, int tid, kmp_info_t *this_thr, 7247 kmp_team_t *team) { 7248 if (__kmp_env_consistency_check) 7249 __kmp_pop_parallel(gtid, team->t.t_ident); 7250 7251 __kmp_finish_implicit_task(this_thr); 7252 } 7253 7254 int __kmp_invoke_task_func(int gtid) { 7255 int rc; 7256 int tid = __kmp_tid_from_gtid(gtid); 7257 kmp_info_t *this_thr = __kmp_threads[gtid]; 7258 kmp_team_t *team = this_thr->th.th_team; 7259 7260 __kmp_run_before_invoked_task(gtid, tid, this_thr, team); 7261 #if USE_ITT_BUILD 7262 if (__itt_stack_caller_create_ptr) { 7263 __kmp_itt_stack_callee_enter( 7264 (__itt_caller) 7265 team->t.t_stack_id); // inform ittnotify about entering user's code 7266 } 7267 #endif /* USE_ITT_BUILD */ 7268 #if INCLUDE_SSC_MARKS 7269 SSC_MARK_INVOKING(); 7270 #endif 7271 7272 #if OMPT_SUPPORT 7273 void *dummy; 7274 void **exit_frame_p; 7275 ompt_data_t *my_task_data; 7276 ompt_data_t *my_parallel_data; 7277 int ompt_team_size; 7278 7279 if (ompt_enabled.enabled) { 7280 exit_frame_p = &( 7281 team->t.t_implicit_task_taskdata[tid].ompt_task_info.frame.exit_frame.ptr); 7282 } else { 7283 exit_frame_p = &dummy; 7284 } 7285 7286 my_task_data = 7287 &(team->t.t_implicit_task_taskdata[tid].ompt_task_info.task_data); 7288 my_parallel_data = &(team->t.ompt_team_info.parallel_data); 7289 if (ompt_enabled.ompt_callback_implicit_task) { 7290 ompt_team_size = team->t.t_nproc; 7291 ompt_callbacks.ompt_callback(ompt_callback_implicit_task)( 7292 ompt_scope_begin, my_parallel_data, my_task_data, ompt_team_size, 7293 __kmp_tid_from_gtid(gtid), ompt_task_implicit); 7294 OMPT_CUR_TASK_INFO(this_thr)->thread_num = __kmp_tid_from_gtid(gtid); 7295 } 7296 #endif 7297 7298 #if KMP_STATS_ENABLED 7299 stats_state_e previous_state = KMP_GET_THREAD_STATE(); 7300 if (previous_state == stats_state_e::TEAMS_REGION) { 7301 KMP_PUSH_PARTITIONED_TIMER(OMP_teams); 7302 } else { 7303 KMP_PUSH_PARTITIONED_TIMER(OMP_parallel); 7304 } 7305 KMP_SET_THREAD_STATE(IMPLICIT_TASK); 7306 #endif 7307 7308 rc = __kmp_invoke_microtask((microtask_t)TCR_SYNC_PTR(team->t.t_pkfn), gtid, 7309 tid, (int)team->t.t_argc, (void **)team->t.t_argv 7310 #if OMPT_SUPPORT 7311 , 7312 exit_frame_p 7313 #endif 7314 ); 7315 #if OMPT_SUPPORT 7316 *exit_frame_p = NULL; 7317 this_thr->th.ompt_thread_info.parallel_flags |= ompt_parallel_team; 7318 #endif 7319 7320 #if KMP_STATS_ENABLED 7321 if (previous_state == stats_state_e::TEAMS_REGION) { 7322 KMP_SET_THREAD_STATE(previous_state); 7323 } 7324 KMP_POP_PARTITIONED_TIMER(); 7325 #endif 7326 7327 #if USE_ITT_BUILD 7328 if (__itt_stack_caller_create_ptr) { 7329 __kmp_itt_stack_callee_leave( 7330 (__itt_caller) 7331 team->t.t_stack_id); // inform ittnotify about leaving user's code 7332 } 7333 #endif /* USE_ITT_BUILD */ 7334 __kmp_run_after_invoked_task(gtid, tid, this_thr, team); 7335 7336 return rc; 7337 } 7338 7339 void __kmp_teams_master(int gtid) { 7340 // This routine is called by all master threads in teams construct 7341 kmp_info_t *thr = __kmp_threads[gtid]; 7342 kmp_team_t *team = thr->th.th_team; 7343 ident_t *loc = team->t.t_ident; 7344 thr->th.th_set_nproc = thr->th.th_teams_size.nth; 7345 KMP_DEBUG_ASSERT(thr->th.th_teams_microtask); 7346 KMP_DEBUG_ASSERT(thr->th.th_set_nproc); 7347 KA_TRACE(20, ("__kmp_teams_master: T#%d, Tid %d, microtask %p\n", gtid, 7348 __kmp_tid_from_gtid(gtid), thr->th.th_teams_microtask)); 7349 7350 // This thread is a new CG root. Set up the proper variables. 7351 kmp_cg_root_t *tmp = (kmp_cg_root_t *)__kmp_allocate(sizeof(kmp_cg_root_t)); 7352 tmp->cg_root = thr; // Make thr the CG root 7353 // Init to thread limit that was stored when league masters were forked 7354 tmp->cg_thread_limit = thr->th.th_current_task->td_icvs.thread_limit; 7355 tmp->cg_nthreads = 1; // Init counter to one active thread, this one 7356 KA_TRACE(100, ("__kmp_teams_master: Thread %p created node %p and init" 7357 " cg_nthreads to 1\n", 7358 thr, tmp)); 7359 tmp->up = thr->th.th_cg_roots; 7360 thr->th.th_cg_roots = tmp; 7361 7362 // Launch league of teams now, but not let workers execute 7363 // (they hang on fork barrier until next parallel) 7364 #if INCLUDE_SSC_MARKS 7365 SSC_MARK_FORKING(); 7366 #endif 7367 __kmp_fork_call(loc, gtid, fork_context_intel, team->t.t_argc, 7368 (microtask_t)thr->th.th_teams_microtask, // "wrapped" task 7369 VOLATILE_CAST(launch_t) __kmp_invoke_task_func, NULL); 7370 #if INCLUDE_SSC_MARKS 7371 SSC_MARK_JOINING(); 7372 #endif 7373 // If the team size was reduced from the limit, set it to the new size 7374 if (thr->th.th_team_nproc < thr->th.th_teams_size.nth) 7375 thr->th.th_teams_size.nth = thr->th.th_team_nproc; 7376 // AC: last parameter "1" eliminates join barrier which won't work because 7377 // worker threads are in a fork barrier waiting for more parallel regions 7378 __kmp_join_call(loc, gtid 7379 #if OMPT_SUPPORT 7380 , 7381 fork_context_intel 7382 #endif 7383 , 7384 1); 7385 } 7386 7387 int __kmp_invoke_teams_master(int gtid) { 7388 kmp_info_t *this_thr = __kmp_threads[gtid]; 7389 kmp_team_t *team = this_thr->th.th_team; 7390 #if KMP_DEBUG 7391 if (!__kmp_threads[gtid]->th.th_team->t.t_serialized) 7392 KMP_DEBUG_ASSERT((void *)__kmp_threads[gtid]->th.th_team->t.t_pkfn == 7393 (void *)__kmp_teams_master); 7394 #endif 7395 __kmp_run_before_invoked_task(gtid, 0, this_thr, team); 7396 #if OMPT_SUPPORT 7397 int tid = __kmp_tid_from_gtid(gtid); 7398 ompt_data_t *task_data = 7399 &team->t.t_implicit_task_taskdata[tid].ompt_task_info.task_data; 7400 ompt_data_t *parallel_data = &team->t.ompt_team_info.parallel_data; 7401 if (ompt_enabled.ompt_callback_implicit_task) { 7402 ompt_callbacks.ompt_callback(ompt_callback_implicit_task)( 7403 ompt_scope_begin, parallel_data, task_data, team->t.t_nproc, tid, 7404 ompt_task_initial); 7405 OMPT_CUR_TASK_INFO(this_thr)->thread_num = tid; 7406 } 7407 #endif 7408 __kmp_teams_master(gtid); 7409 #if OMPT_SUPPORT 7410 this_thr->th.ompt_thread_info.parallel_flags |= ompt_parallel_league; 7411 #endif 7412 __kmp_run_after_invoked_task(gtid, 0, this_thr, team); 7413 return 1; 7414 } 7415 7416 /* this sets the requested number of threads for the next parallel region 7417 encountered by this team. since this should be enclosed in the forkjoin 7418 critical section it should avoid race conditions with asymmetrical nested 7419 parallelism */ 7420 7421 void __kmp_push_num_threads(ident_t *id, int gtid, int num_threads) { 7422 kmp_info_t *thr = __kmp_threads[gtid]; 7423 7424 if (num_threads > 0) 7425 thr->th.th_set_nproc = num_threads; 7426 } 7427 7428 /* this sets the requested number of teams for the teams region and/or 7429 the number of threads for the next parallel region encountered */ 7430 void __kmp_push_num_teams(ident_t *id, int gtid, int num_teams, 7431 int num_threads) { 7432 kmp_info_t *thr = __kmp_threads[gtid]; 7433 KMP_DEBUG_ASSERT(num_teams >= 0); 7434 KMP_DEBUG_ASSERT(num_threads >= 0); 7435 7436 if (num_teams == 0) 7437 num_teams = 1; // default number of teams is 1. 7438 if (num_teams > __kmp_teams_max_nth) { // if too many teams requested? 7439 if (!__kmp_reserve_warn) { 7440 __kmp_reserve_warn = 1; 7441 __kmp_msg(kmp_ms_warning, 7442 KMP_MSG(CantFormThrTeam, num_teams, __kmp_teams_max_nth), 7443 KMP_HNT(Unset_ALL_THREADS), __kmp_msg_null); 7444 } 7445 num_teams = __kmp_teams_max_nth; 7446 } 7447 // Set number of teams (number of threads in the outer "parallel" of the 7448 // teams) 7449 thr->th.th_set_nproc = thr->th.th_teams_size.nteams = num_teams; 7450 7451 // Remember the number of threads for inner parallel regions 7452 if (!TCR_4(__kmp_init_middle)) 7453 __kmp_middle_initialize(); // get internal globals calculated 7454 KMP_DEBUG_ASSERT(__kmp_avail_proc); 7455 KMP_DEBUG_ASSERT(__kmp_dflt_team_nth); 7456 if (num_threads == 0) { 7457 num_threads = __kmp_avail_proc / num_teams; 7458 // adjust num_threads w/o warning as it is not user setting 7459 // num_threads = min(num_threads, nthreads-var, thread-limit-var) 7460 // no thread_limit clause specified - do not change thread-limit-var ICV 7461 if (num_threads > __kmp_dflt_team_nth) { 7462 num_threads = __kmp_dflt_team_nth; // honor nthreads-var ICV 7463 } 7464 if (num_threads > thr->th.th_current_task->td_icvs.thread_limit) { 7465 num_threads = thr->th.th_current_task->td_icvs.thread_limit; 7466 } // prevent team size to exceed thread-limit-var 7467 if (num_teams * num_threads > __kmp_teams_max_nth) { 7468 num_threads = __kmp_teams_max_nth / num_teams; 7469 } 7470 } else { 7471 // This thread will be the master of the league masters 7472 // Store new thread limit; old limit is saved in th_cg_roots list 7473 thr->th.th_current_task->td_icvs.thread_limit = num_threads; 7474 // num_threads = min(num_threads, nthreads-var) 7475 if (num_threads > __kmp_dflt_team_nth) { 7476 num_threads = __kmp_dflt_team_nth; // honor nthreads-var ICV 7477 } 7478 if (num_teams * num_threads > __kmp_teams_max_nth) { 7479 int new_threads = __kmp_teams_max_nth / num_teams; 7480 if (!__kmp_reserve_warn) { // user asked for too many threads 7481 __kmp_reserve_warn = 1; // conflicts with KMP_TEAMS_THREAD_LIMIT 7482 __kmp_msg(kmp_ms_warning, 7483 KMP_MSG(CantFormThrTeam, num_threads, new_threads), 7484 KMP_HNT(Unset_ALL_THREADS), __kmp_msg_null); 7485 } 7486 num_threads = new_threads; 7487 } 7488 } 7489 thr->th.th_teams_size.nth = num_threads; 7490 } 7491 7492 // Set the proc_bind var to use in the following parallel region. 7493 void __kmp_push_proc_bind(ident_t *id, int gtid, kmp_proc_bind_t proc_bind) { 7494 kmp_info_t *thr = __kmp_threads[gtid]; 7495 thr->th.th_set_proc_bind = proc_bind; 7496 } 7497 7498 /* Launch the worker threads into the microtask. */ 7499 7500 void __kmp_internal_fork(ident_t *id, int gtid, kmp_team_t *team) { 7501 kmp_info_t *this_thr = __kmp_threads[gtid]; 7502 7503 #ifdef KMP_DEBUG 7504 int f; 7505 #endif /* KMP_DEBUG */ 7506 7507 KMP_DEBUG_ASSERT(team); 7508 KMP_DEBUG_ASSERT(this_thr->th.th_team == team); 7509 KMP_ASSERT(KMP_MASTER_GTID(gtid)); 7510 KMP_MB(); /* Flush all pending memory write invalidates. */ 7511 7512 team->t.t_construct = 0; /* no single directives seen yet */ 7513 team->t.t_ordered.dt.t_value = 7514 0; /* thread 0 enters the ordered section first */ 7515 7516 /* Reset the identifiers on the dispatch buffer */ 7517 KMP_DEBUG_ASSERT(team->t.t_disp_buffer); 7518 if (team->t.t_max_nproc > 1) { 7519 int i; 7520 for (i = 0; i < __kmp_dispatch_num_buffers; ++i) { 7521 team->t.t_disp_buffer[i].buffer_index = i; 7522 team->t.t_disp_buffer[i].doacross_buf_idx = i; 7523 } 7524 } else { 7525 team->t.t_disp_buffer[0].buffer_index = 0; 7526 team->t.t_disp_buffer[0].doacross_buf_idx = 0; 7527 } 7528 7529 KMP_MB(); /* Flush all pending memory write invalidates. */ 7530 KMP_ASSERT(this_thr->th.th_team == team); 7531 7532 #ifdef KMP_DEBUG 7533 for (f = 0; f < team->t.t_nproc; f++) { 7534 KMP_DEBUG_ASSERT(team->t.t_threads[f] && 7535 team->t.t_threads[f]->th.th_team_nproc == team->t.t_nproc); 7536 } 7537 #endif /* KMP_DEBUG */ 7538 7539 /* release the worker threads so they may begin working */ 7540 __kmp_fork_barrier(gtid, 0); 7541 } 7542 7543 void __kmp_internal_join(ident_t *id, int gtid, kmp_team_t *team) { 7544 kmp_info_t *this_thr = __kmp_threads[gtid]; 7545 7546 KMP_DEBUG_ASSERT(team); 7547 KMP_DEBUG_ASSERT(this_thr->th.th_team == team); 7548 KMP_ASSERT(KMP_MASTER_GTID(gtid)); 7549 KMP_MB(); /* Flush all pending memory write invalidates. */ 7550 7551 /* Join barrier after fork */ 7552 7553 #ifdef KMP_DEBUG 7554 if (__kmp_threads[gtid] && 7555 __kmp_threads[gtid]->th.th_team_nproc != team->t.t_nproc) { 7556 __kmp_printf("GTID: %d, __kmp_threads[%d]=%p\n", gtid, gtid, 7557 __kmp_threads[gtid]); 7558 __kmp_printf("__kmp_threads[%d]->th.th_team_nproc=%d, TEAM: %p, " 7559 "team->t.t_nproc=%d\n", 7560 gtid, __kmp_threads[gtid]->th.th_team_nproc, team, 7561 team->t.t_nproc); 7562 __kmp_print_structure(); 7563 } 7564 KMP_DEBUG_ASSERT(__kmp_threads[gtid] && 7565 __kmp_threads[gtid]->th.th_team_nproc == team->t.t_nproc); 7566 #endif /* KMP_DEBUG */ 7567 7568 __kmp_join_barrier(gtid); /* wait for everyone */ 7569 #if OMPT_SUPPORT 7570 if (ompt_enabled.enabled && 7571 this_thr->th.ompt_thread_info.state == ompt_state_wait_barrier_implicit) { 7572 int ds_tid = this_thr->th.th_info.ds.ds_tid; 7573 ompt_data_t *task_data = OMPT_CUR_TASK_DATA(this_thr); 7574 this_thr->th.ompt_thread_info.state = ompt_state_overhead; 7575 #if OMPT_OPTIONAL 7576 void *codeptr = NULL; 7577 if (KMP_MASTER_TID(ds_tid) && 7578 (ompt_callbacks.ompt_callback(ompt_callback_sync_region_wait) || 7579 ompt_callbacks.ompt_callback(ompt_callback_sync_region))) 7580 codeptr = OMPT_CUR_TEAM_INFO(this_thr)->master_return_address; 7581 7582 if (ompt_enabled.ompt_callback_sync_region_wait) { 7583 ompt_callbacks.ompt_callback(ompt_callback_sync_region_wait)( 7584 ompt_sync_region_barrier_implicit, ompt_scope_end, NULL, task_data, 7585 codeptr); 7586 } 7587 if (ompt_enabled.ompt_callback_sync_region) { 7588 ompt_callbacks.ompt_callback(ompt_callback_sync_region)( 7589 ompt_sync_region_barrier_implicit, ompt_scope_end, NULL, task_data, 7590 codeptr); 7591 } 7592 #endif 7593 if (!KMP_MASTER_TID(ds_tid) && ompt_enabled.ompt_callback_implicit_task) { 7594 ompt_callbacks.ompt_callback(ompt_callback_implicit_task)( 7595 ompt_scope_end, NULL, task_data, 0, ds_tid, ompt_task_implicit); // TODO: Can this be ompt_task_initial? 7596 } 7597 } 7598 #endif 7599 7600 KMP_MB(); /* Flush all pending memory write invalidates. */ 7601 KMP_ASSERT(this_thr->th.th_team == team); 7602 } 7603 7604 /* ------------------------------------------------------------------------ */ 7605 7606 #ifdef USE_LOAD_BALANCE 7607 7608 // Return the worker threads actively spinning in the hot team, if we 7609 // are at the outermost level of parallelism. Otherwise, return 0. 7610 static int __kmp_active_hot_team_nproc(kmp_root_t *root) { 7611 int i; 7612 int retval; 7613 kmp_team_t *hot_team; 7614 7615 if (root->r.r_active) { 7616 return 0; 7617 } 7618 hot_team = root->r.r_hot_team; 7619 if (__kmp_dflt_blocktime == KMP_MAX_BLOCKTIME) { 7620 return hot_team->t.t_nproc - 1; // Don't count master thread 7621 } 7622 7623 // Skip the master thread - it is accounted for elsewhere. 7624 retval = 0; 7625 for (i = 1; i < hot_team->t.t_nproc; i++) { 7626 if (hot_team->t.t_threads[i]->th.th_active) { 7627 retval++; 7628 } 7629 } 7630 return retval; 7631 } 7632 7633 // Perform an automatic adjustment to the number of 7634 // threads used by the next parallel region. 7635 static int __kmp_load_balance_nproc(kmp_root_t *root, int set_nproc) { 7636 int retval; 7637 int pool_active; 7638 int hot_team_active; 7639 int team_curr_active; 7640 int system_active; 7641 7642 KB_TRACE(20, ("__kmp_load_balance_nproc: called root:%p set_nproc:%d\n", root, 7643 set_nproc)); 7644 KMP_DEBUG_ASSERT(root); 7645 KMP_DEBUG_ASSERT(root->r.r_root_team->t.t_threads[0] 7646 ->th.th_current_task->td_icvs.dynamic == TRUE); 7647 KMP_DEBUG_ASSERT(set_nproc > 1); 7648 7649 if (set_nproc == 1) { 7650 KB_TRACE(20, ("__kmp_load_balance_nproc: serial execution.\n")); 7651 return 1; 7652 } 7653 7654 // Threads that are active in the thread pool, active in the hot team for this 7655 // particular root (if we are at the outer par level), and the currently 7656 // executing thread (to become the master) are available to add to the new 7657 // team, but are currently contributing to the system load, and must be 7658 // accounted for. 7659 pool_active = __kmp_thread_pool_active_nth; 7660 hot_team_active = __kmp_active_hot_team_nproc(root); 7661 team_curr_active = pool_active + hot_team_active + 1; 7662 7663 // Check the system load. 7664 system_active = __kmp_get_load_balance(__kmp_avail_proc + team_curr_active); 7665 KB_TRACE(30, ("__kmp_load_balance_nproc: system active = %d pool active = %d " 7666 "hot team active = %d\n", 7667 system_active, pool_active, hot_team_active)); 7668 7669 if (system_active < 0) { 7670 // There was an error reading the necessary info from /proc, so use the 7671 // thread limit algorithm instead. Once we set __kmp_global.g.g_dynamic_mode 7672 // = dynamic_thread_limit, we shouldn't wind up getting back here. 7673 __kmp_global.g.g_dynamic_mode = dynamic_thread_limit; 7674 KMP_WARNING(CantLoadBalUsing, "KMP_DYNAMIC_MODE=thread limit"); 7675 7676 // Make this call behave like the thread limit algorithm. 7677 retval = __kmp_avail_proc - __kmp_nth + 7678 (root->r.r_active ? 1 : root->r.r_hot_team->t.t_nproc); 7679 if (retval > set_nproc) { 7680 retval = set_nproc; 7681 } 7682 if (retval < KMP_MIN_NTH) { 7683 retval = KMP_MIN_NTH; 7684 } 7685 7686 KB_TRACE(20, ("__kmp_load_balance_nproc: thread limit exit. retval:%d\n", 7687 retval)); 7688 return retval; 7689 } 7690 7691 // There is a slight delay in the load balance algorithm in detecting new 7692 // running procs. The real system load at this instant should be at least as 7693 // large as the #active omp thread that are available to add to the team. 7694 if (system_active < team_curr_active) { 7695 system_active = team_curr_active; 7696 } 7697 retval = __kmp_avail_proc - system_active + team_curr_active; 7698 if (retval > set_nproc) { 7699 retval = set_nproc; 7700 } 7701 if (retval < KMP_MIN_NTH) { 7702 retval = KMP_MIN_NTH; 7703 } 7704 7705 KB_TRACE(20, ("__kmp_load_balance_nproc: exit. retval:%d\n", retval)); 7706 return retval; 7707 } // __kmp_load_balance_nproc() 7708 7709 #endif /* USE_LOAD_BALANCE */ 7710 7711 /* ------------------------------------------------------------------------ */ 7712 7713 /* NOTE: this is called with the __kmp_init_lock held */ 7714 void __kmp_cleanup(void) { 7715 int f; 7716 7717 KA_TRACE(10, ("__kmp_cleanup: enter\n")); 7718 7719 if (TCR_4(__kmp_init_parallel)) { 7720 #if KMP_HANDLE_SIGNALS 7721 __kmp_remove_signals(); 7722 #endif 7723 TCW_4(__kmp_init_parallel, FALSE); 7724 } 7725 7726 if (TCR_4(__kmp_init_middle)) { 7727 #if KMP_AFFINITY_SUPPORTED 7728 __kmp_affinity_uninitialize(); 7729 #endif /* KMP_AFFINITY_SUPPORTED */ 7730 __kmp_cleanup_hierarchy(); 7731 TCW_4(__kmp_init_middle, FALSE); 7732 } 7733 7734 KA_TRACE(10, ("__kmp_cleanup: go serial cleanup\n")); 7735 7736 if (__kmp_init_serial) { 7737 __kmp_runtime_destroy(); 7738 __kmp_init_serial = FALSE; 7739 } 7740 7741 __kmp_cleanup_threadprivate_caches(); 7742 7743 for (f = 0; f < __kmp_threads_capacity; f++) { 7744 if (__kmp_root[f] != NULL) { 7745 __kmp_free(__kmp_root[f]); 7746 __kmp_root[f] = NULL; 7747 } 7748 } 7749 __kmp_free(__kmp_threads); 7750 // __kmp_threads and __kmp_root were allocated at once, as single block, so 7751 // there is no need in freeing __kmp_root. 7752 __kmp_threads = NULL; 7753 __kmp_root = NULL; 7754 __kmp_threads_capacity = 0; 7755 7756 #if KMP_USE_DYNAMIC_LOCK 7757 __kmp_cleanup_indirect_user_locks(); 7758 #else 7759 __kmp_cleanup_user_locks(); 7760 #endif 7761 7762 #if KMP_AFFINITY_SUPPORTED 7763 KMP_INTERNAL_FREE(CCAST(char *, __kmp_cpuinfo_file)); 7764 __kmp_cpuinfo_file = NULL; 7765 #endif /* KMP_AFFINITY_SUPPORTED */ 7766 7767 #if KMP_USE_ADAPTIVE_LOCKS 7768 #if KMP_DEBUG_ADAPTIVE_LOCKS 7769 __kmp_print_speculative_stats(); 7770 #endif 7771 #endif 7772 KMP_INTERNAL_FREE(__kmp_nested_nth.nth); 7773 __kmp_nested_nth.nth = NULL; 7774 __kmp_nested_nth.size = 0; 7775 __kmp_nested_nth.used = 0; 7776 KMP_INTERNAL_FREE(__kmp_nested_proc_bind.bind_types); 7777 __kmp_nested_proc_bind.bind_types = NULL; 7778 __kmp_nested_proc_bind.size = 0; 7779 __kmp_nested_proc_bind.used = 0; 7780 if (__kmp_affinity_format) { 7781 KMP_INTERNAL_FREE(__kmp_affinity_format); 7782 __kmp_affinity_format = NULL; 7783 } 7784 7785 __kmp_i18n_catclose(); 7786 7787 #if KMP_USE_HIER_SCHED 7788 __kmp_hier_scheds.deallocate(); 7789 #endif 7790 7791 #if KMP_STATS_ENABLED 7792 __kmp_stats_fini(); 7793 #endif 7794 7795 KA_TRACE(10, ("__kmp_cleanup: exit\n")); 7796 } 7797 7798 /* ------------------------------------------------------------------------ */ 7799 7800 int __kmp_ignore_mppbeg(void) { 7801 char *env; 7802 7803 if ((env = getenv("KMP_IGNORE_MPPBEG")) != NULL) { 7804 if (__kmp_str_match_false(env)) 7805 return FALSE; 7806 } 7807 // By default __kmpc_begin() is no-op. 7808 return TRUE; 7809 } 7810 7811 int __kmp_ignore_mppend(void) { 7812 char *env; 7813 7814 if ((env = getenv("KMP_IGNORE_MPPEND")) != NULL) { 7815 if (__kmp_str_match_false(env)) 7816 return FALSE; 7817 } 7818 // By default __kmpc_end() is no-op. 7819 return TRUE; 7820 } 7821 7822 void __kmp_internal_begin(void) { 7823 int gtid; 7824 kmp_root_t *root; 7825 7826 /* this is a very important step as it will register new sibling threads 7827 and assign these new uber threads a new gtid */ 7828 gtid = __kmp_entry_gtid(); 7829 root = __kmp_threads[gtid]->th.th_root; 7830 KMP_ASSERT(KMP_UBER_GTID(gtid)); 7831 7832 if (root->r.r_begin) 7833 return; 7834 __kmp_acquire_lock(&root->r.r_begin_lock, gtid); 7835 if (root->r.r_begin) { 7836 __kmp_release_lock(&root->r.r_begin_lock, gtid); 7837 return; 7838 } 7839 7840 root->r.r_begin = TRUE; 7841 7842 __kmp_release_lock(&root->r.r_begin_lock, gtid); 7843 } 7844 7845 /* ------------------------------------------------------------------------ */ 7846 7847 void __kmp_user_set_library(enum library_type arg) { 7848 int gtid; 7849 kmp_root_t *root; 7850 kmp_info_t *thread; 7851 7852 /* first, make sure we are initialized so we can get our gtid */ 7853 7854 gtid = __kmp_entry_gtid(); 7855 thread = __kmp_threads[gtid]; 7856 7857 root = thread->th.th_root; 7858 7859 KA_TRACE(20, ("__kmp_user_set_library: enter T#%d, arg: %d, %d\n", gtid, arg, 7860 library_serial)); 7861 if (root->r.r_in_parallel) { /* Must be called in serial section of top-level 7862 thread */ 7863 KMP_WARNING(SetLibraryIncorrectCall); 7864 return; 7865 } 7866 7867 switch (arg) { 7868 case library_serial: 7869 thread->th.th_set_nproc = 0; 7870 set__nproc(thread, 1); 7871 break; 7872 case library_turnaround: 7873 thread->th.th_set_nproc = 0; 7874 set__nproc(thread, __kmp_dflt_team_nth ? __kmp_dflt_team_nth 7875 : __kmp_dflt_team_nth_ub); 7876 break; 7877 case library_throughput: 7878 thread->th.th_set_nproc = 0; 7879 set__nproc(thread, __kmp_dflt_team_nth ? __kmp_dflt_team_nth 7880 : __kmp_dflt_team_nth_ub); 7881 break; 7882 default: 7883 KMP_FATAL(UnknownLibraryType, arg); 7884 } 7885 7886 __kmp_aux_set_library(arg); 7887 } 7888 7889 void __kmp_aux_set_stacksize(size_t arg) { 7890 if (!__kmp_init_serial) 7891 __kmp_serial_initialize(); 7892 7893 #if KMP_OS_DARWIN 7894 if (arg & (0x1000 - 1)) { 7895 arg &= ~(0x1000 - 1); 7896 if (arg + 0x1000) /* check for overflow if we round up */ 7897 arg += 0x1000; 7898 } 7899 #endif 7900 __kmp_acquire_bootstrap_lock(&__kmp_initz_lock); 7901 7902 /* only change the default stacksize before the first parallel region */ 7903 if (!TCR_4(__kmp_init_parallel)) { 7904 size_t value = arg; /* argument is in bytes */ 7905 7906 if (value < __kmp_sys_min_stksize) 7907 value = __kmp_sys_min_stksize; 7908 else if (value > KMP_MAX_STKSIZE) 7909 value = KMP_MAX_STKSIZE; 7910 7911 __kmp_stksize = value; 7912 7913 __kmp_env_stksize = TRUE; /* was KMP_STACKSIZE specified? */ 7914 } 7915 7916 __kmp_release_bootstrap_lock(&__kmp_initz_lock); 7917 } 7918 7919 /* set the behaviour of the runtime library */ 7920 /* TODO this can cause some odd behaviour with sibling parallelism... */ 7921 void __kmp_aux_set_library(enum library_type arg) { 7922 __kmp_library = arg; 7923 7924 switch (__kmp_library) { 7925 case library_serial: { 7926 KMP_INFORM(LibraryIsSerial); 7927 } break; 7928 case library_turnaround: 7929 if (__kmp_use_yield == 1 && !__kmp_use_yield_exp_set) 7930 __kmp_use_yield = 2; // only yield when oversubscribed 7931 break; 7932 case library_throughput: 7933 if (__kmp_dflt_blocktime == KMP_MAX_BLOCKTIME) 7934 __kmp_dflt_blocktime = 200; 7935 break; 7936 default: 7937 KMP_FATAL(UnknownLibraryType, arg); 7938 } 7939 } 7940 7941 /* Getting team information common for all team API */ 7942 // Returns NULL if not in teams construct 7943 static kmp_team_t *__kmp_aux_get_team_info(int &teams_serialized) { 7944 kmp_info_t *thr = __kmp_entry_thread(); 7945 teams_serialized = 0; 7946 if (thr->th.th_teams_microtask) { 7947 kmp_team_t *team = thr->th.th_team; 7948 int tlevel = thr->th.th_teams_level; // the level of the teams construct 7949 int ii = team->t.t_level; 7950 teams_serialized = team->t.t_serialized; 7951 int level = tlevel + 1; 7952 KMP_DEBUG_ASSERT(ii >= tlevel); 7953 while (ii > level) { 7954 for (teams_serialized = team->t.t_serialized; 7955 (teams_serialized > 0) && (ii > level); teams_serialized--, ii--) { 7956 } 7957 if (team->t.t_serialized && (!teams_serialized)) { 7958 team = team->t.t_parent; 7959 continue; 7960 } 7961 if (ii > level) { 7962 team = team->t.t_parent; 7963 ii--; 7964 } 7965 } 7966 return team; 7967 } 7968 return NULL; 7969 } 7970 7971 int __kmp_aux_get_team_num() { 7972 int serialized; 7973 kmp_team_t *team = __kmp_aux_get_team_info(serialized); 7974 if (team) { 7975 if (serialized > 1) { 7976 return 0; // teams region is serialized ( 1 team of 1 thread ). 7977 } else { 7978 return team->t.t_master_tid; 7979 } 7980 } 7981 return 0; 7982 } 7983 7984 int __kmp_aux_get_num_teams() { 7985 int serialized; 7986 kmp_team_t *team = __kmp_aux_get_team_info(serialized); 7987 if (team) { 7988 if (serialized > 1) { 7989 return 1; 7990 } else { 7991 return team->t.t_parent->t.t_nproc; 7992 } 7993 } 7994 return 1; 7995 } 7996 7997 /* ------------------------------------------------------------------------ */ 7998 7999 /* 8000 * Affinity Format Parser 8001 * 8002 * Field is in form of: %[[[0].]size]type 8003 * % and type are required (%% means print a literal '%') 8004 * type is either single char or long name surrounded by {}, 8005 * e.g., N or {num_threads} 8006 * 0 => leading zeros 8007 * . => right justified when size is specified 8008 * by default output is left justified 8009 * size is the *minimum* field length 8010 * All other characters are printed as is 8011 * 8012 * Available field types: 8013 * L {thread_level} - omp_get_level() 8014 * n {thread_num} - omp_get_thread_num() 8015 * h {host} - name of host machine 8016 * P {process_id} - process id (integer) 8017 * T {thread_identifier} - native thread identifier (integer) 8018 * N {num_threads} - omp_get_num_threads() 8019 * A {ancestor_tnum} - omp_get_ancestor_thread_num(omp_get_level()-1) 8020 * a {thread_affinity} - comma separated list of integers or integer ranges 8021 * (values of affinity mask) 8022 * 8023 * Implementation-specific field types can be added 8024 * If a type is unknown, print "undefined" 8025 */ 8026 8027 // Structure holding the short name, long name, and corresponding data type 8028 // for snprintf. A table of these will represent the entire valid keyword 8029 // field types. 8030 typedef struct kmp_affinity_format_field_t { 8031 char short_name; // from spec e.g., L -> thread level 8032 const char *long_name; // from spec thread_level -> thread level 8033 char field_format; // data type for snprintf (typically 'd' or 's' 8034 // for integer or string) 8035 } kmp_affinity_format_field_t; 8036 8037 static const kmp_affinity_format_field_t __kmp_affinity_format_table[] = { 8038 #if KMP_AFFINITY_SUPPORTED 8039 {'A', "thread_affinity", 's'}, 8040 #endif 8041 {'t', "team_num", 'd'}, 8042 {'T', "num_teams", 'd'}, 8043 {'L', "nesting_level", 'd'}, 8044 {'n', "thread_num", 'd'}, 8045 {'N', "num_threads", 'd'}, 8046 {'a', "ancestor_tnum", 'd'}, 8047 {'H', "host", 's'}, 8048 {'P', "process_id", 'd'}, 8049 {'i', "native_thread_id", 'd'}}; 8050 8051 // Return the number of characters it takes to hold field 8052 static int __kmp_aux_capture_affinity_field(int gtid, const kmp_info_t *th, 8053 const char **ptr, 8054 kmp_str_buf_t *field_buffer) { 8055 int rc, format_index, field_value; 8056 const char *width_left, *width_right; 8057 bool pad_zeros, right_justify, parse_long_name, found_valid_name; 8058 static const int FORMAT_SIZE = 20; 8059 char format[FORMAT_SIZE] = {0}; 8060 char absolute_short_name = 0; 8061 8062 KMP_DEBUG_ASSERT(gtid >= 0); 8063 KMP_DEBUG_ASSERT(th); 8064 KMP_DEBUG_ASSERT(**ptr == '%'); 8065 KMP_DEBUG_ASSERT(field_buffer); 8066 8067 __kmp_str_buf_clear(field_buffer); 8068 8069 // Skip the initial % 8070 (*ptr)++; 8071 8072 // Check for %% first 8073 if (**ptr == '%') { 8074 __kmp_str_buf_cat(field_buffer, "%", 1); 8075 (*ptr)++; // skip over the second % 8076 return 1; 8077 } 8078 8079 // Parse field modifiers if they are present 8080 pad_zeros = false; 8081 if (**ptr == '0') { 8082 pad_zeros = true; 8083 (*ptr)++; // skip over 0 8084 } 8085 right_justify = false; 8086 if (**ptr == '.') { 8087 right_justify = true; 8088 (*ptr)++; // skip over . 8089 } 8090 // Parse width of field: [width_left, width_right) 8091 width_left = width_right = NULL; 8092 if (**ptr >= '0' && **ptr <= '9') { 8093 width_left = *ptr; 8094 SKIP_DIGITS(*ptr); 8095 width_right = *ptr; 8096 } 8097 8098 // Create the format for KMP_SNPRINTF based on flags parsed above 8099 format_index = 0; 8100 format[format_index++] = '%'; 8101 if (!right_justify) 8102 format[format_index++] = '-'; 8103 if (pad_zeros) 8104 format[format_index++] = '0'; 8105 if (width_left && width_right) { 8106 int i = 0; 8107 // Only allow 8 digit number widths. 8108 // This also prevents overflowing format variable 8109 while (i < 8 && width_left < width_right) { 8110 format[format_index++] = *width_left; 8111 width_left++; 8112 i++; 8113 } 8114 } 8115 8116 // Parse a name (long or short) 8117 // Canonicalize the name into absolute_short_name 8118 found_valid_name = false; 8119 parse_long_name = (**ptr == '{'); 8120 if (parse_long_name) 8121 (*ptr)++; // skip initial left brace 8122 for (size_t i = 0; i < sizeof(__kmp_affinity_format_table) / 8123 sizeof(__kmp_affinity_format_table[0]); 8124 ++i) { 8125 char short_name = __kmp_affinity_format_table[i].short_name; 8126 const char *long_name = __kmp_affinity_format_table[i].long_name; 8127 char field_format = __kmp_affinity_format_table[i].field_format; 8128 if (parse_long_name) { 8129 size_t length = KMP_STRLEN(long_name); 8130 if (strncmp(*ptr, long_name, length) == 0) { 8131 found_valid_name = true; 8132 (*ptr) += length; // skip the long name 8133 } 8134 } else if (**ptr == short_name) { 8135 found_valid_name = true; 8136 (*ptr)++; // skip the short name 8137 } 8138 if (found_valid_name) { 8139 format[format_index++] = field_format; 8140 format[format_index++] = '\0'; 8141 absolute_short_name = short_name; 8142 break; 8143 } 8144 } 8145 if (parse_long_name) { 8146 if (**ptr != '}') { 8147 absolute_short_name = 0; 8148 } else { 8149 (*ptr)++; // skip over the right brace 8150 } 8151 } 8152 8153 // Attempt to fill the buffer with the requested 8154 // value using snprintf within __kmp_str_buf_print() 8155 switch (absolute_short_name) { 8156 case 't': 8157 rc = __kmp_str_buf_print(field_buffer, format, __kmp_aux_get_team_num()); 8158 break; 8159 case 'T': 8160 rc = __kmp_str_buf_print(field_buffer, format, __kmp_aux_get_num_teams()); 8161 break; 8162 case 'L': 8163 rc = __kmp_str_buf_print(field_buffer, format, th->th.th_team->t.t_level); 8164 break; 8165 case 'n': 8166 rc = __kmp_str_buf_print(field_buffer, format, __kmp_tid_from_gtid(gtid)); 8167 break; 8168 case 'H': { 8169 static const int BUFFER_SIZE = 256; 8170 char buf[BUFFER_SIZE]; 8171 __kmp_expand_host_name(buf, BUFFER_SIZE); 8172 rc = __kmp_str_buf_print(field_buffer, format, buf); 8173 } break; 8174 case 'P': 8175 rc = __kmp_str_buf_print(field_buffer, format, getpid()); 8176 break; 8177 case 'i': 8178 rc = __kmp_str_buf_print(field_buffer, format, __kmp_gettid()); 8179 break; 8180 case 'N': 8181 rc = __kmp_str_buf_print(field_buffer, format, th->th.th_team->t.t_nproc); 8182 break; 8183 case 'a': 8184 field_value = 8185 __kmp_get_ancestor_thread_num(gtid, th->th.th_team->t.t_level - 1); 8186 rc = __kmp_str_buf_print(field_buffer, format, field_value); 8187 break; 8188 #if KMP_AFFINITY_SUPPORTED 8189 case 'A': { 8190 kmp_str_buf_t buf; 8191 __kmp_str_buf_init(&buf); 8192 __kmp_affinity_str_buf_mask(&buf, th->th.th_affin_mask); 8193 rc = __kmp_str_buf_print(field_buffer, format, buf.str); 8194 __kmp_str_buf_free(&buf); 8195 } break; 8196 #endif 8197 default: 8198 // According to spec, If an implementation does not have info for field 8199 // type, then "undefined" is printed 8200 rc = __kmp_str_buf_print(field_buffer, "%s", "undefined"); 8201 // Skip the field 8202 if (parse_long_name) { 8203 SKIP_TOKEN(*ptr); 8204 if (**ptr == '}') 8205 (*ptr)++; 8206 } else { 8207 (*ptr)++; 8208 } 8209 } 8210 8211 KMP_ASSERT(format_index <= FORMAT_SIZE); 8212 return rc; 8213 } 8214 8215 /* 8216 * Return number of characters needed to hold the affinity string 8217 * (not including null byte character) 8218 * The resultant string is printed to buffer, which the caller can then 8219 * handle afterwards 8220 */ 8221 size_t __kmp_aux_capture_affinity(int gtid, const char *format, 8222 kmp_str_buf_t *buffer) { 8223 const char *parse_ptr; 8224 size_t retval; 8225 const kmp_info_t *th; 8226 kmp_str_buf_t field; 8227 8228 KMP_DEBUG_ASSERT(buffer); 8229 KMP_DEBUG_ASSERT(gtid >= 0); 8230 8231 __kmp_str_buf_init(&field); 8232 __kmp_str_buf_clear(buffer); 8233 8234 th = __kmp_threads[gtid]; 8235 retval = 0; 8236 8237 // If format is NULL or zero-length string, then we use 8238 // affinity-format-var ICV 8239 parse_ptr = format; 8240 if (parse_ptr == NULL || *parse_ptr == '\0') { 8241 parse_ptr = __kmp_affinity_format; 8242 } 8243 KMP_DEBUG_ASSERT(parse_ptr); 8244 8245 while (*parse_ptr != '\0') { 8246 // Parse a field 8247 if (*parse_ptr == '%') { 8248 // Put field in the buffer 8249 int rc = __kmp_aux_capture_affinity_field(gtid, th, &parse_ptr, &field); 8250 __kmp_str_buf_catbuf(buffer, &field); 8251 retval += rc; 8252 } else { 8253 // Put literal character in buffer 8254 __kmp_str_buf_cat(buffer, parse_ptr, 1); 8255 retval++; 8256 parse_ptr++; 8257 } 8258 } 8259 __kmp_str_buf_free(&field); 8260 return retval; 8261 } 8262 8263 // Displays the affinity string to stdout 8264 void __kmp_aux_display_affinity(int gtid, const char *format) { 8265 kmp_str_buf_t buf; 8266 __kmp_str_buf_init(&buf); 8267 __kmp_aux_capture_affinity(gtid, format, &buf); 8268 __kmp_fprintf(kmp_out, "%s" KMP_END_OF_LINE, buf.str); 8269 __kmp_str_buf_free(&buf); 8270 } 8271 8272 /* ------------------------------------------------------------------------ */ 8273 8274 void __kmp_aux_set_blocktime(int arg, kmp_info_t *thread, int tid) { 8275 int blocktime = arg; /* argument is in milliseconds */ 8276 #if KMP_USE_MONITOR 8277 int bt_intervals; 8278 #endif 8279 kmp_int8 bt_set; 8280 8281 __kmp_save_internal_controls(thread); 8282 8283 /* Normalize and set blocktime for the teams */ 8284 if (blocktime < KMP_MIN_BLOCKTIME) 8285 blocktime = KMP_MIN_BLOCKTIME; 8286 else if (blocktime > KMP_MAX_BLOCKTIME) 8287 blocktime = KMP_MAX_BLOCKTIME; 8288 8289 set__blocktime_team(thread->th.th_team, tid, blocktime); 8290 set__blocktime_team(thread->th.th_serial_team, 0, blocktime); 8291 8292 #if KMP_USE_MONITOR 8293 /* Calculate and set blocktime intervals for the teams */ 8294 bt_intervals = KMP_INTERVALS_FROM_BLOCKTIME(blocktime, __kmp_monitor_wakeups); 8295 8296 set__bt_intervals_team(thread->th.th_team, tid, bt_intervals); 8297 set__bt_intervals_team(thread->th.th_serial_team, 0, bt_intervals); 8298 #endif 8299 8300 /* Set whether blocktime has been set to "TRUE" */ 8301 bt_set = TRUE; 8302 8303 set__bt_set_team(thread->th.th_team, tid, bt_set); 8304 set__bt_set_team(thread->th.th_serial_team, 0, bt_set); 8305 #if KMP_USE_MONITOR 8306 KF_TRACE(10, ("kmp_set_blocktime: T#%d(%d:%d), blocktime=%d, " 8307 "bt_intervals=%d, monitor_updates=%d\n", 8308 __kmp_gtid_from_tid(tid, thread->th.th_team), 8309 thread->th.th_team->t.t_id, tid, blocktime, bt_intervals, 8310 __kmp_monitor_wakeups)); 8311 #else 8312 KF_TRACE(10, ("kmp_set_blocktime: T#%d(%d:%d), blocktime=%d\n", 8313 __kmp_gtid_from_tid(tid, thread->th.th_team), 8314 thread->th.th_team->t.t_id, tid, blocktime)); 8315 #endif 8316 } 8317 8318 void __kmp_aux_set_defaults(char const *str, size_t len) { 8319 if (!__kmp_init_serial) { 8320 __kmp_serial_initialize(); 8321 } 8322 __kmp_env_initialize(str); 8323 8324 if (__kmp_settings || __kmp_display_env || __kmp_display_env_verbose) { 8325 __kmp_env_print(); 8326 } 8327 } // __kmp_aux_set_defaults 8328 8329 /* ------------------------------------------------------------------------ */ 8330 /* internal fast reduction routines */ 8331 8332 PACKED_REDUCTION_METHOD_T 8333 __kmp_determine_reduction_method( 8334 ident_t *loc, kmp_int32 global_tid, kmp_int32 num_vars, size_t reduce_size, 8335 void *reduce_data, void (*reduce_func)(void *lhs_data, void *rhs_data), 8336 kmp_critical_name *lck) { 8337 8338 // Default reduction method: critical construct ( lck != NULL, like in current 8339 // PAROPT ) 8340 // If ( reduce_data!=NULL && reduce_func!=NULL ): the tree-reduction method 8341 // can be selected by RTL 8342 // If loc->flags contains KMP_IDENT_ATOMIC_REDUCE, the atomic reduce method 8343 // can be selected by RTL 8344 // Finally, it's up to OpenMP RTL to make a decision on which method to select 8345 // among generated by PAROPT. 8346 8347 PACKED_REDUCTION_METHOD_T retval; 8348 8349 int team_size; 8350 8351 KMP_DEBUG_ASSERT(loc); // it would be nice to test ( loc != 0 ) 8352 KMP_DEBUG_ASSERT(lck); // it would be nice to test ( lck != 0 ) 8353 8354 #define FAST_REDUCTION_ATOMIC_METHOD_GENERATED \ 8355 ((loc->flags & (KMP_IDENT_ATOMIC_REDUCE)) == (KMP_IDENT_ATOMIC_REDUCE)) 8356 #define FAST_REDUCTION_TREE_METHOD_GENERATED ((reduce_data) && (reduce_func)) 8357 8358 retval = critical_reduce_block; 8359 8360 // another choice of getting a team size (with 1 dynamic deference) is slower 8361 team_size = __kmp_get_team_num_threads(global_tid); 8362 if (team_size == 1) { 8363 8364 retval = empty_reduce_block; 8365 8366 } else { 8367 8368 int atomic_available = FAST_REDUCTION_ATOMIC_METHOD_GENERATED; 8369 8370 #if KMP_ARCH_X86_64 || KMP_ARCH_PPC64 || KMP_ARCH_AARCH64 || \ 8371 KMP_ARCH_MIPS64 || KMP_ARCH_RISCV64 8372 8373 #if KMP_OS_LINUX || KMP_OS_DRAGONFLY || KMP_OS_FREEBSD || KMP_OS_NETBSD || \ 8374 KMP_OS_OPENBSD || KMP_OS_WINDOWS || KMP_OS_DARWIN || KMP_OS_HURD 8375 8376 int teamsize_cutoff = 4; 8377 8378 #if KMP_MIC_SUPPORTED 8379 if (__kmp_mic_type != non_mic) { 8380 teamsize_cutoff = 8; 8381 } 8382 #endif 8383 int tree_available = FAST_REDUCTION_TREE_METHOD_GENERATED; 8384 if (tree_available) { 8385 if (team_size <= teamsize_cutoff) { 8386 if (atomic_available) { 8387 retval = atomic_reduce_block; 8388 } 8389 } else { 8390 retval = TREE_REDUCE_BLOCK_WITH_REDUCTION_BARRIER; 8391 } 8392 } else if (atomic_available) { 8393 retval = atomic_reduce_block; 8394 } 8395 #else 8396 #error "Unknown or unsupported OS" 8397 #endif // KMP_OS_LINUX || KMP_OS_DRAGONFLY || KMP_OS_FREEBSD || KMP_OS_NETBSD || 8398 // KMP_OS_OPENBSD || KMP_OS_WINDOWS || KMP_OS_DARWIN || KMP_OS_HURD 8399 8400 #elif KMP_ARCH_X86 || KMP_ARCH_ARM || KMP_ARCH_AARCH || KMP_ARCH_MIPS 8401 8402 #if KMP_OS_LINUX || KMP_OS_FREEBSD || KMP_OS_WINDOWS || KMP_OS_HURD 8403 8404 // basic tuning 8405 8406 if (atomic_available) { 8407 if (num_vars <= 2) { // && ( team_size <= 8 ) due to false-sharing ??? 8408 retval = atomic_reduce_block; 8409 } 8410 } // otherwise: use critical section 8411 8412 #elif KMP_OS_DARWIN 8413 8414 int tree_available = FAST_REDUCTION_TREE_METHOD_GENERATED; 8415 if (atomic_available && (num_vars <= 3)) { 8416 retval = atomic_reduce_block; 8417 } else if (tree_available) { 8418 if ((reduce_size > (9 * sizeof(kmp_real64))) && 8419 (reduce_size < (2000 * sizeof(kmp_real64)))) { 8420 retval = TREE_REDUCE_BLOCK_WITH_PLAIN_BARRIER; 8421 } 8422 } // otherwise: use critical section 8423 8424 #else 8425 #error "Unknown or unsupported OS" 8426 #endif 8427 8428 #else 8429 #error "Unknown or unsupported architecture" 8430 #endif 8431 } 8432 8433 // KMP_FORCE_REDUCTION 8434 8435 // If the team is serialized (team_size == 1), ignore the forced reduction 8436 // method and stay with the unsynchronized method (empty_reduce_block) 8437 if (__kmp_force_reduction_method != reduction_method_not_defined && 8438 team_size != 1) { 8439 8440 PACKED_REDUCTION_METHOD_T forced_retval = critical_reduce_block; 8441 8442 int atomic_available, tree_available; 8443 8444 switch ((forced_retval = __kmp_force_reduction_method)) { 8445 case critical_reduce_block: 8446 KMP_ASSERT(lck); // lck should be != 0 8447 break; 8448 8449 case atomic_reduce_block: 8450 atomic_available = FAST_REDUCTION_ATOMIC_METHOD_GENERATED; 8451 if (!atomic_available) { 8452 KMP_WARNING(RedMethodNotSupported, "atomic"); 8453 forced_retval = critical_reduce_block; 8454 } 8455 break; 8456 8457 case tree_reduce_block: 8458 tree_available = FAST_REDUCTION_TREE_METHOD_GENERATED; 8459 if (!tree_available) { 8460 KMP_WARNING(RedMethodNotSupported, "tree"); 8461 forced_retval = critical_reduce_block; 8462 } else { 8463 #if KMP_FAST_REDUCTION_BARRIER 8464 forced_retval = TREE_REDUCE_BLOCK_WITH_REDUCTION_BARRIER; 8465 #endif 8466 } 8467 break; 8468 8469 default: 8470 KMP_ASSERT(0); // "unsupported method specified" 8471 } 8472 8473 retval = forced_retval; 8474 } 8475 8476 KA_TRACE(10, ("reduction method selected=%08x\n", retval)); 8477 8478 #undef FAST_REDUCTION_TREE_METHOD_GENERATED 8479 #undef FAST_REDUCTION_ATOMIC_METHOD_GENERATED 8480 8481 return (retval); 8482 } 8483 // this function is for testing set/get/determine reduce method 8484 kmp_int32 __kmp_get_reduce_method(void) { 8485 return ((__kmp_entry_thread()->th.th_local.packed_reduction_method) >> 8); 8486 } 8487 8488 // Soft pause sets up threads to ignore blocktime and just go to sleep. 8489 // Spin-wait code checks __kmp_pause_status and reacts accordingly. 8490 void __kmp_soft_pause() { __kmp_pause_status = kmp_soft_paused; } 8491 8492 // Hard pause shuts down the runtime completely. Resume happens naturally when 8493 // OpenMP is used subsequently. 8494 void __kmp_hard_pause() { 8495 __kmp_pause_status = kmp_hard_paused; 8496 __kmp_internal_end_thread(-1); 8497 } 8498 8499 // Soft resume sets __kmp_pause_status, and wakes up all threads. 8500 void __kmp_resume_if_soft_paused() { 8501 if (__kmp_pause_status == kmp_soft_paused) { 8502 __kmp_pause_status = kmp_not_paused; 8503 8504 for (int gtid = 1; gtid < __kmp_threads_capacity; ++gtid) { 8505 kmp_info_t *thread = __kmp_threads[gtid]; 8506 if (thread) { // Wake it if sleeping 8507 kmp_flag_64<> fl(&thread->th.th_bar[bs_forkjoin_barrier].bb.b_go, 8508 thread); 8509 if (fl.is_sleeping()) 8510 fl.resume(gtid); 8511 else if (__kmp_try_suspend_mx(thread)) { // got suspend lock 8512 __kmp_unlock_suspend_mx(thread); // unlock it; it won't sleep 8513 } else { // thread holds the lock and may sleep soon 8514 do { // until either the thread sleeps, or we can get the lock 8515 if (fl.is_sleeping()) { 8516 fl.resume(gtid); 8517 break; 8518 } else if (__kmp_try_suspend_mx(thread)) { 8519 __kmp_unlock_suspend_mx(thread); 8520 break; 8521 } 8522 } while (1); 8523 } 8524 } 8525 } 8526 } 8527 } 8528 8529 // This function is called via __kmpc_pause_resource. Returns 0 if successful. 8530 // TODO: add warning messages 8531 int __kmp_pause_resource(kmp_pause_status_t level) { 8532 if (level == kmp_not_paused) { // requesting resume 8533 if (__kmp_pause_status == kmp_not_paused) { 8534 // error message about runtime not being paused, so can't resume 8535 return 1; 8536 } else { 8537 KMP_DEBUG_ASSERT(__kmp_pause_status == kmp_soft_paused || 8538 __kmp_pause_status == kmp_hard_paused); 8539 __kmp_pause_status = kmp_not_paused; 8540 return 0; 8541 } 8542 } else if (level == kmp_soft_paused) { // requesting soft pause 8543 if (__kmp_pause_status != kmp_not_paused) { 8544 // error message about already being paused 8545 return 1; 8546 } else { 8547 __kmp_soft_pause(); 8548 return 0; 8549 } 8550 } else if (level == kmp_hard_paused) { // requesting hard pause 8551 if (__kmp_pause_status != kmp_not_paused) { 8552 // error message about already being paused 8553 return 1; 8554 } else { 8555 __kmp_hard_pause(); 8556 return 0; 8557 } 8558 } else { 8559 // error message about invalid level 8560 return 1; 8561 } 8562 } 8563 8564 void __kmp_omp_display_env(int verbose) { 8565 __kmp_acquire_bootstrap_lock(&__kmp_initz_lock); 8566 if (__kmp_init_serial == 0) 8567 __kmp_do_serial_initialize(); 8568 __kmp_display_env_impl(!verbose, verbose); 8569 __kmp_release_bootstrap_lock(&__kmp_initz_lock); 8570 } 8571 8572 // Globals and functions for hidden helper task 8573 kmp_info_t **__kmp_hidden_helper_threads; 8574 kmp_info_t *__kmp_hidden_helper_main_thread; 8575 kmp_int32 __kmp_hidden_helper_threads_num = 8; 8576 std::atomic<kmp_int32> __kmp_unexecuted_hidden_helper_tasks; 8577 #if KMP_OS_LINUX 8578 kmp_int32 __kmp_enable_hidden_helper = TRUE; 8579 #else 8580 kmp_int32 __kmp_enable_hidden_helper = FALSE; 8581 #endif 8582 8583 namespace { 8584 std::atomic<kmp_int32> __kmp_hit_hidden_helper_threads_num; 8585 8586 void __kmp_hidden_helper_wrapper_fn(int *gtid, int *, ...) { 8587 // This is an explicit synchronization on all hidden helper threads in case 8588 // that when a regular thread pushes a hidden helper task to one hidden 8589 // helper thread, the thread has not been awaken once since they're released 8590 // by the main thread after creating the team. 8591 KMP_ATOMIC_INC(&__kmp_hit_hidden_helper_threads_num); 8592 while (KMP_ATOMIC_LD_ACQ(&__kmp_hit_hidden_helper_threads_num) != 8593 __kmp_hidden_helper_threads_num) 8594 ; 8595 8596 // If main thread, then wait for signal 8597 if (__kmpc_master(nullptr, *gtid)) { 8598 // First, unset the initial state and release the initial thread 8599 TCW_4(__kmp_init_hidden_helper_threads, FALSE); 8600 __kmp_hidden_helper_initz_release(); 8601 __kmp_hidden_helper_main_thread_wait(); 8602 // Now wake up all worker threads 8603 for (int i = 1; i < __kmp_hit_hidden_helper_threads_num; ++i) { 8604 __kmp_hidden_helper_worker_thread_signal(); 8605 } 8606 } 8607 } 8608 } // namespace 8609 8610 void __kmp_hidden_helper_threads_initz_routine() { 8611 // Create a new root for hidden helper team/threads 8612 const int gtid = __kmp_register_root(TRUE); 8613 __kmp_hidden_helper_main_thread = __kmp_threads[gtid]; 8614 __kmp_hidden_helper_threads = &__kmp_threads[gtid]; 8615 __kmp_hidden_helper_main_thread->th.th_set_nproc = 8616 __kmp_hidden_helper_threads_num; 8617 8618 KMP_ATOMIC_ST_REL(&__kmp_hit_hidden_helper_threads_num, 0); 8619 8620 __kmpc_fork_call(nullptr, 0, __kmp_hidden_helper_wrapper_fn); 8621 8622 // Set the initialization flag to FALSE 8623 TCW_SYNC_4(__kmp_init_hidden_helper, FALSE); 8624 8625 __kmp_hidden_helper_threads_deinitz_release(); 8626 } 8627