1 /* 2 * kmp_global.cpp -- KPTS global variables for 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 #if KMP_USE_HIER_SCHED 16 #include "kmp_dispatch_hier.h" 17 #endif 18 19 kmp_key_t __kmp_gtid_threadprivate_key; 20 21 #if KMP_ARCH_X86 || KMP_ARCH_X86_64 22 kmp_cpuinfo_t __kmp_cpuinfo = {0}; // Not initialized 23 #endif 24 25 #if KMP_STATS_ENABLED 26 #include "kmp_stats.h" 27 // lock for modifying the global __kmp_stats_list 28 kmp_tas_lock_t __kmp_stats_lock; 29 30 // global list of per thread stats, the head is a sentinel node which 31 // accumulates all stats produced before __kmp_create_worker is called. 32 kmp_stats_list *__kmp_stats_list; 33 34 // thread local pointer to stats node within list 35 KMP_THREAD_LOCAL kmp_stats_list *__kmp_stats_thread_ptr = NULL; 36 37 // gives reference tick for all events (considered the 0 tick) 38 tsc_tick_count __kmp_stats_start_time; 39 #endif 40 41 /* ----------------------------------------------------- */ 42 /* INITIALIZATION VARIABLES */ 43 /* they are syncronized to write during init, but read anytime */ 44 volatile int __kmp_init_serial = FALSE; 45 volatile int __kmp_init_gtid = FALSE; 46 volatile int __kmp_init_common = FALSE; 47 volatile int __kmp_init_middle = FALSE; 48 volatile int __kmp_init_parallel = FALSE; 49 volatile int __kmp_init_hidden_helper = FALSE; 50 volatile int __kmp_init_hidden_helper_threads = FALSE; 51 volatile int __kmp_hidden_helper_team_done = FALSE; 52 #if KMP_USE_MONITOR 53 volatile int __kmp_init_monitor = 54 0; /* 1 - launched, 2 - actually started (Windows* OS only) */ 55 #endif 56 volatile int __kmp_init_user_locks = FALSE; 57 58 /* list of address of allocated caches for commons */ 59 kmp_cached_addr_t *__kmp_threadpriv_cache_list = NULL; 60 61 int __kmp_init_counter = 0; 62 int __kmp_root_counter = 0; 63 int __kmp_version = 0; 64 65 std::atomic<kmp_int32> __kmp_team_counter = ATOMIC_VAR_INIT(0); 66 std::atomic<kmp_int32> __kmp_task_counter = ATOMIC_VAR_INIT(0); 67 68 size_t __kmp_stksize = KMP_DEFAULT_STKSIZE; 69 #if KMP_USE_MONITOR 70 size_t __kmp_monitor_stksize = 0; // auto adjust 71 #endif 72 size_t __kmp_stkoffset = KMP_DEFAULT_STKOFFSET; 73 int __kmp_stkpadding = KMP_MIN_STKPADDING; 74 75 size_t __kmp_malloc_pool_incr = KMP_DEFAULT_MALLOC_POOL_INCR; 76 77 // Barrier method defaults, settings, and strings. 78 // branch factor = 2^branch_bits (only relevant for tree & hyper barrier types) 79 kmp_uint32 __kmp_barrier_gather_bb_dflt = 2; 80 /* branch_factor = 4 */ /* hyper2: C78980 */ 81 kmp_uint32 __kmp_barrier_release_bb_dflt = 2; 82 /* branch_factor = 4 */ /* hyper2: C78980 */ 83 84 kmp_bar_pat_e __kmp_barrier_gather_pat_dflt = bp_hyper_bar; 85 /* hyper2: C78980 */ 86 kmp_bar_pat_e __kmp_barrier_release_pat_dflt = bp_hyper_bar; 87 /* hyper2: C78980 */ 88 89 kmp_uint32 __kmp_barrier_gather_branch_bits[bs_last_barrier] = {0}; 90 kmp_uint32 __kmp_barrier_release_branch_bits[bs_last_barrier] = {0}; 91 kmp_bar_pat_e __kmp_barrier_gather_pattern[bs_last_barrier] = {bp_linear_bar}; 92 kmp_bar_pat_e __kmp_barrier_release_pattern[bs_last_barrier] = {bp_linear_bar}; 93 char const *__kmp_barrier_branch_bit_env_name[bs_last_barrier] = { 94 "KMP_PLAIN_BARRIER", "KMP_FORKJOIN_BARRIER" 95 #if KMP_FAST_REDUCTION_BARRIER 96 , 97 "KMP_REDUCTION_BARRIER" 98 #endif // KMP_FAST_REDUCTION_BARRIER 99 }; 100 char const *__kmp_barrier_pattern_env_name[bs_last_barrier] = { 101 "KMP_PLAIN_BARRIER_PATTERN", "KMP_FORKJOIN_BARRIER_PATTERN" 102 #if KMP_FAST_REDUCTION_BARRIER 103 , 104 "KMP_REDUCTION_BARRIER_PATTERN" 105 #endif // KMP_FAST_REDUCTION_BARRIER 106 }; 107 char const *__kmp_barrier_type_name[bs_last_barrier] = {"plain", "forkjoin" 108 #if KMP_FAST_REDUCTION_BARRIER 109 , 110 "reduction" 111 #endif // KMP_FAST_REDUCTION_BARRIER 112 }; 113 char const *__kmp_barrier_pattern_name[bp_last_bar] = {"linear", "tree", 114 "hyper", "hierarchical"}; 115 116 int __kmp_allThreadsSpecified = 0; 117 size_t __kmp_align_alloc = CACHE_LINE; 118 119 int __kmp_generate_warnings = kmp_warnings_low; 120 int __kmp_reserve_warn = 0; 121 int __kmp_xproc = 0; 122 int __kmp_avail_proc = 0; 123 size_t __kmp_sys_min_stksize = KMP_MIN_STKSIZE; 124 int __kmp_sys_max_nth = KMP_MAX_NTH; 125 int __kmp_max_nth = 0; 126 int __kmp_cg_max_nth = 0; 127 int __kmp_teams_max_nth = 0; 128 int __kmp_threads_capacity = 0; 129 int __kmp_dflt_team_nth = 0; 130 int __kmp_dflt_team_nth_ub = 0; 131 int __kmp_tp_capacity = 0; 132 int __kmp_tp_cached = 0; 133 int __kmp_dispatch_num_buffers = KMP_DFLT_DISP_NUM_BUFF; 134 int __kmp_dflt_max_active_levels = 1; // Nesting off by default 135 bool __kmp_dflt_max_active_levels_set = false; // Don't override set value 136 #if KMP_NESTED_HOT_TEAMS 137 int __kmp_hot_teams_mode = 0; /* 0 - free extra threads when reduced */ 138 /* 1 - keep extra threads when reduced */ 139 int __kmp_hot_teams_max_level = 1; /* nesting level of hot teams */ 140 #endif 141 enum library_type __kmp_library = library_none; 142 enum sched_type __kmp_sched = 143 kmp_sch_default; /* scheduling method for runtime scheduling */ 144 enum sched_type __kmp_static = 145 kmp_sch_static_greedy; /* default static scheduling method */ 146 enum sched_type __kmp_guided = 147 kmp_sch_guided_iterative_chunked; /* default guided scheduling method */ 148 enum sched_type __kmp_auto = 149 kmp_sch_guided_analytical_chunked; /* default auto scheduling method */ 150 #if KMP_USE_HIER_SCHED 151 int __kmp_dispatch_hand_threading = 0; 152 int __kmp_hier_max_units[kmp_hier_layer_e::LAYER_LAST + 1]; 153 int __kmp_hier_threads_per[kmp_hier_layer_e::LAYER_LAST + 1]; 154 kmp_hier_sched_env_t __kmp_hier_scheds = {0, 0, NULL, NULL, NULL}; 155 #endif 156 int __kmp_dflt_blocktime = KMP_DEFAULT_BLOCKTIME; 157 #if KMP_USE_MONITOR 158 int __kmp_monitor_wakeups = KMP_MIN_MONITOR_WAKEUPS; 159 int __kmp_bt_intervals = KMP_INTERVALS_FROM_BLOCKTIME(KMP_DEFAULT_BLOCKTIME, 160 KMP_MIN_MONITOR_WAKEUPS); 161 #endif 162 #ifdef KMP_ADJUST_BLOCKTIME 163 int __kmp_zero_bt = FALSE; 164 #endif /* KMP_ADJUST_BLOCKTIME */ 165 #ifdef KMP_DFLT_NTH_CORES 166 int __kmp_ncores = 0; 167 #endif 168 int __kmp_chunk = 0; 169 int __kmp_force_monotonic = 0; 170 int __kmp_abort_delay = 0; 171 #if KMP_OS_LINUX && defined(KMP_TDATA_GTID) 172 int __kmp_gtid_mode = 3; /* use __declspec(thread) TLS to store gtid */ 173 int __kmp_adjust_gtid_mode = FALSE; 174 #elif KMP_OS_WINDOWS 175 int __kmp_gtid_mode = 2; /* use TLS functions to store gtid */ 176 int __kmp_adjust_gtid_mode = FALSE; 177 #else 178 int __kmp_gtid_mode = 0; /* select method to get gtid based on #threads */ 179 int __kmp_adjust_gtid_mode = TRUE; 180 #endif /* KMP_OS_LINUX && defined(KMP_TDATA_GTID) */ 181 #ifdef KMP_TDATA_GTID 182 KMP_THREAD_LOCAL int __kmp_gtid = KMP_GTID_DNE; 183 #endif /* KMP_TDATA_GTID */ 184 int __kmp_tls_gtid_min = INT_MAX; 185 int __kmp_foreign_tp = TRUE; 186 #if KMP_ARCH_X86 || KMP_ARCH_X86_64 187 int __kmp_inherit_fp_control = TRUE; 188 kmp_int16 __kmp_init_x87_fpu_control_word = 0; 189 kmp_uint32 __kmp_init_mxcsr = 0; 190 #endif /* KMP_ARCH_X86 || KMP_ARCH_X86_64 */ 191 192 #ifdef USE_LOAD_BALANCE 193 double __kmp_load_balance_interval = 1.0; 194 #endif /* USE_LOAD_BALANCE */ 195 196 kmp_nested_nthreads_t __kmp_nested_nth = {NULL, 0, 0}; 197 198 #if KMP_USE_ADAPTIVE_LOCKS 199 200 kmp_adaptive_backoff_params_t __kmp_adaptive_backoff_params = { 201 1, 1024}; // TODO: tune it! 202 203 #if KMP_DEBUG_ADAPTIVE_LOCKS 204 const char *__kmp_speculative_statsfile = "-"; 205 #endif 206 207 #endif // KMP_USE_ADAPTIVE_LOCKS 208 209 int __kmp_display_env = FALSE; 210 int __kmp_display_env_verbose = FALSE; 211 int __kmp_omp_cancellation = FALSE; 212 int __kmp_nteams = 0; 213 int __kmp_teams_thread_limit = 0; 214 215 #if KMP_HAVE_MWAIT || KMP_HAVE_UMWAIT 216 int __kmp_user_level_mwait = FALSE; 217 int __kmp_umwait_enabled = FALSE; 218 int __kmp_mwait_enabled = FALSE; 219 int __kmp_mwait_hints = 0; 220 #endif 221 222 /* map OMP 3.0 schedule types with our internal schedule types */ 223 enum sched_type __kmp_sch_map[kmp_sched_upper - kmp_sched_lower_ext + 224 kmp_sched_upper_std - kmp_sched_lower - 2] = { 225 kmp_sch_static_chunked, // ==> kmp_sched_static = 1 226 kmp_sch_dynamic_chunked, // ==> kmp_sched_dynamic = 2 227 kmp_sch_guided_chunked, // ==> kmp_sched_guided = 3 228 kmp_sch_auto, // ==> kmp_sched_auto = 4 229 kmp_sch_trapezoidal // ==> kmp_sched_trapezoidal = 101 230 // will likely not be used, introduced here just to debug the code 231 // of public intel extension schedules 232 }; 233 234 #if KMP_OS_LINUX 235 enum clock_function_type __kmp_clock_function; 236 int __kmp_clock_function_param; 237 #endif /* KMP_OS_LINUX */ 238 239 #if KMP_MIC_SUPPORTED 240 enum mic_type __kmp_mic_type = non_mic; 241 #endif 242 243 #if KMP_AFFINITY_SUPPORTED 244 245 KMPAffinity *__kmp_affinity_dispatch = NULL; 246 247 #if KMP_USE_HWLOC 248 int __kmp_hwloc_error = FALSE; 249 hwloc_topology_t __kmp_hwloc_topology = NULL; 250 #endif 251 252 #if KMP_OS_WINDOWS 253 #if KMP_GROUP_AFFINITY 254 int __kmp_num_proc_groups = 1; 255 #endif /* KMP_GROUP_AFFINITY */ 256 kmp_GetActiveProcessorCount_t __kmp_GetActiveProcessorCount = NULL; 257 kmp_GetActiveProcessorGroupCount_t __kmp_GetActiveProcessorGroupCount = NULL; 258 kmp_GetThreadGroupAffinity_t __kmp_GetThreadGroupAffinity = NULL; 259 kmp_SetThreadGroupAffinity_t __kmp_SetThreadGroupAffinity = NULL; 260 #endif /* KMP_OS_WINDOWS */ 261 262 size_t __kmp_affin_mask_size = 0; 263 enum affinity_type __kmp_affinity_type = affinity_default; 264 kmp_hw_t __kmp_affinity_gran = KMP_HW_UNKNOWN; 265 int __kmp_affinity_gran_levels = -1; 266 int __kmp_affinity_dups = TRUE; 267 enum affinity_top_method __kmp_affinity_top_method = 268 affinity_top_method_default; 269 int __kmp_affinity_compact = 0; 270 int __kmp_affinity_offset = 0; 271 int __kmp_affinity_verbose = FALSE; 272 int __kmp_affinity_warnings = TRUE; 273 int __kmp_affinity_respect_mask = affinity_respect_mask_default; 274 char *__kmp_affinity_proclist = NULL; 275 kmp_affin_mask_t *__kmp_affinity_masks = NULL; 276 unsigned __kmp_affinity_num_masks = 0; 277 278 char *__kmp_cpuinfo_file = NULL; 279 280 #endif /* KMP_AFFINITY_SUPPORTED */ 281 282 kmp_nested_proc_bind_t __kmp_nested_proc_bind = {NULL, 0, 0}; 283 int __kmp_affinity_num_places = 0; 284 int __kmp_display_affinity = FALSE; 285 char *__kmp_affinity_format = NULL; 286 287 kmp_int32 __kmp_default_device = 0; 288 289 kmp_tasking_mode_t __kmp_tasking_mode = tskm_task_teams; 290 kmp_int32 __kmp_max_task_priority = 0; 291 kmp_uint64 __kmp_taskloop_min_tasks = 0; 292 293 int __kmp_memkind_available = 0; 294 omp_allocator_handle_t const omp_null_allocator = NULL; 295 omp_allocator_handle_t const omp_default_mem_alloc = 296 (omp_allocator_handle_t const)1; 297 omp_allocator_handle_t const omp_large_cap_mem_alloc = 298 (omp_allocator_handle_t const)2; 299 omp_allocator_handle_t const omp_const_mem_alloc = 300 (omp_allocator_handle_t const)3; 301 omp_allocator_handle_t const omp_high_bw_mem_alloc = 302 (omp_allocator_handle_t const)4; 303 omp_allocator_handle_t const omp_low_lat_mem_alloc = 304 (omp_allocator_handle_t const)5; 305 omp_allocator_handle_t const omp_cgroup_mem_alloc = 306 (omp_allocator_handle_t const)6; 307 omp_allocator_handle_t const omp_pteam_mem_alloc = 308 (omp_allocator_handle_t const)7; 309 omp_allocator_handle_t const omp_thread_mem_alloc = 310 (omp_allocator_handle_t const)8; 311 // Preview of target memory support 312 omp_allocator_handle_t const llvm_omp_target_host_mem_alloc = 313 (omp_allocator_handle_t const)100; 314 omp_allocator_handle_t const llvm_omp_target_shared_mem_alloc = 315 (omp_allocator_handle_t const)101; 316 omp_allocator_handle_t const llvm_omp_target_device_mem_alloc = 317 (omp_allocator_handle_t const)102; 318 omp_allocator_handle_t const kmp_max_mem_alloc = 319 (omp_allocator_handle_t const)1024; 320 omp_allocator_handle_t __kmp_def_allocator = omp_default_mem_alloc; 321 322 omp_memspace_handle_t const omp_default_mem_space = 323 (omp_memspace_handle_t const)0; 324 omp_memspace_handle_t const omp_large_cap_mem_space = 325 (omp_memspace_handle_t const)1; 326 omp_memspace_handle_t const omp_const_mem_space = 327 (omp_memspace_handle_t const)2; 328 omp_memspace_handle_t const omp_high_bw_mem_space = 329 (omp_memspace_handle_t const)3; 330 omp_memspace_handle_t const omp_low_lat_mem_space = 331 (omp_memspace_handle_t const)4; 332 // Preview of target memory support 333 omp_memspace_handle_t const llvm_omp_target_host_mem_space = 334 (omp_memspace_handle_t const)100; 335 omp_memspace_handle_t const llvm_omp_target_shared_mem_space = 336 (omp_memspace_handle_t const)101; 337 omp_memspace_handle_t const llvm_omp_target_device_mem_space = 338 (omp_memspace_handle_t const)102; 339 340 /* This check ensures that the compiler is passing the correct data type for the 341 flags formal parameter of the function kmpc_omp_task_alloc(). If the type is 342 not a 4-byte type, then give an error message about a non-positive length 343 array pointing here. If that happens, the kmp_tasking_flags_t structure must 344 be redefined to have exactly 32 bits. */ 345 KMP_BUILD_ASSERT(sizeof(kmp_tasking_flags_t) == 4); 346 347 int __kmp_task_stealing_constraint = 1; /* Constrain task stealing by default */ 348 int __kmp_enable_task_throttling = 1; 349 350 #ifdef DEBUG_SUSPEND 351 int __kmp_suspend_count = 0; 352 #endif 353 354 int __kmp_settings = FALSE; 355 int __kmp_duplicate_library_ok = 0; 356 #if USE_ITT_BUILD 357 int __kmp_forkjoin_frames = 1; 358 int __kmp_forkjoin_frames_mode = 3; 359 #endif 360 PACKED_REDUCTION_METHOD_T __kmp_force_reduction_method = 361 reduction_method_not_defined; 362 int __kmp_determ_red = FALSE; 363 364 #ifdef KMP_DEBUG 365 int kmp_a_debug = 0; 366 int kmp_b_debug = 0; 367 int kmp_c_debug = 0; 368 int kmp_d_debug = 0; 369 int kmp_e_debug = 0; 370 int kmp_f_debug = 0; 371 int kmp_diag = 0; 372 #endif 373 374 /* For debug information logging using rotating buffer */ 375 int __kmp_debug_buf = 376 FALSE; /* TRUE means use buffer, FALSE means print to stderr */ 377 int __kmp_debug_buf_lines = 378 KMP_DEBUG_BUF_LINES_INIT; /* Lines of debug stored in buffer */ 379 int __kmp_debug_buf_chars = 380 KMP_DEBUG_BUF_CHARS_INIT; /* Characters allowed per line in buffer */ 381 int __kmp_debug_buf_atomic = 382 FALSE; /* TRUE means use atomic update of buffer entry pointer */ 383 384 char *__kmp_debug_buffer = NULL; /* Debug buffer itself */ 385 std::atomic<int> __kmp_debug_count = 386 ATOMIC_VAR_INIT(0); /* number of lines printed in buffer so far */ 387 int __kmp_debug_buf_warn_chars = 388 0; /* Keep track of char increase recommended in warnings */ 389 /* end rotating debug buffer */ 390 391 #ifdef KMP_DEBUG 392 int __kmp_par_range; /* +1 => only go par for constructs in range */ 393 /* -1 => only go par for constructs outside range */ 394 char __kmp_par_range_routine[KMP_PAR_RANGE_ROUTINE_LEN] = {'\0'}; 395 char __kmp_par_range_filename[KMP_PAR_RANGE_FILENAME_LEN] = {'\0'}; 396 int __kmp_par_range_lb = 0; 397 int __kmp_par_range_ub = INT_MAX; 398 #endif /* KMP_DEBUG */ 399 400 /* For printing out dynamic storage map for threads and teams */ 401 int __kmp_storage_map = 402 FALSE; /* True means print storage map for threads and teams */ 403 int __kmp_storage_map_verbose = 404 FALSE; /* True means storage map includes placement info */ 405 int __kmp_storage_map_verbose_specified = FALSE; 406 /* Initialize the library data structures when we fork a child process, defaults 407 * to TRUE */ 408 int __kmp_need_register_atfork = 409 TRUE; /* At initialization, call pthread_atfork to install fork handler */ 410 int __kmp_need_register_atfork_specified = TRUE; 411 412 int __kmp_env_stksize = FALSE; /* KMP_STACKSIZE specified? */ 413 int __kmp_env_blocktime = FALSE; /* KMP_BLOCKTIME specified? */ 414 int __kmp_env_checks = FALSE; /* KMP_CHECKS specified? */ 415 int __kmp_env_consistency_check = FALSE; /* KMP_CONSISTENCY_CHECK specified? */ 416 417 // From KMP_USE_YIELD: 418 // 0 = never yield; 419 // 1 = always yield (default); 420 // 2 = yield only if oversubscribed 421 kmp_int32 __kmp_use_yield = 1; 422 // This will be 1 if KMP_USE_YIELD environment variable was set explicitly 423 kmp_int32 __kmp_use_yield_exp_set = 0; 424 425 kmp_uint32 __kmp_yield_init = KMP_INIT_WAIT; 426 kmp_uint32 __kmp_yield_next = KMP_NEXT_WAIT; 427 428 /* ------------------------------------------------------ */ 429 /* STATE mostly syncronized with global lock */ 430 /* data written to rarely by primary threads, read often by workers */ 431 /* TODO: None of this global padding stuff works consistently because the order 432 of declaration is not necessarily correlated to storage order. To fix this, 433 all the important globals must be put in a big structure instead. */ 434 KMP_ALIGN_CACHE 435 kmp_info_t **__kmp_threads = NULL; 436 kmp_root_t **__kmp_root = NULL; 437 438 /* data read/written to often by primary threads */ 439 KMP_ALIGN_CACHE 440 volatile int __kmp_nth = 0; 441 volatile int __kmp_all_nth = 0; 442 volatile kmp_info_t *__kmp_thread_pool = NULL; 443 volatile kmp_team_t *__kmp_team_pool = NULL; 444 445 KMP_ALIGN_CACHE 446 std::atomic<int> __kmp_thread_pool_active_nth = ATOMIC_VAR_INIT(0); 447 448 /* ------------------------------------------------- 449 * GLOBAL/ROOT STATE */ 450 KMP_ALIGN_CACHE 451 kmp_global_t __kmp_global; 452 453 /* ----------------------------------------------- */ 454 /* GLOBAL SYNCHRONIZATION LOCKS */ 455 /* TODO verify the need for these locks and if they need to be global */ 456 457 #if KMP_USE_INTERNODE_ALIGNMENT 458 /* Multinode systems have larger cache line granularity which can cause 459 * false sharing if the alignment is not large enough for these locks */ 460 KMP_ALIGN_CACHE_INTERNODE 461 462 KMP_BOOTSTRAP_LOCK_INIT(__kmp_initz_lock); /* Control initializations */ 463 KMP_ALIGN_CACHE_INTERNODE 464 KMP_BOOTSTRAP_LOCK_INIT(__kmp_forkjoin_lock); /* control fork/join access */ 465 KMP_ALIGN_CACHE_INTERNODE 466 KMP_BOOTSTRAP_LOCK_INIT(__kmp_exit_lock); /* exit() is not always thread-safe */ 467 #if KMP_USE_MONITOR 468 /* control monitor thread creation */ 469 KMP_ALIGN_CACHE_INTERNODE 470 KMP_BOOTSTRAP_LOCK_INIT(__kmp_monitor_lock); 471 #endif 472 /* used for the hack to allow threadprivate cache and __kmp_threads expansion 473 to co-exist */ 474 KMP_ALIGN_CACHE_INTERNODE 475 KMP_BOOTSTRAP_LOCK_INIT(__kmp_tp_cached_lock); 476 477 KMP_ALIGN_CACHE_INTERNODE 478 KMP_LOCK_INIT(__kmp_global_lock); /* Control OS/global access */ 479 KMP_ALIGN_CACHE_INTERNODE 480 kmp_queuing_lock_t __kmp_dispatch_lock; /* Control dispatch access */ 481 KMP_ALIGN_CACHE_INTERNODE 482 KMP_LOCK_INIT(__kmp_debug_lock); /* Control I/O access for KMP_DEBUG */ 483 #else 484 KMP_ALIGN_CACHE 485 486 KMP_BOOTSTRAP_LOCK_INIT(__kmp_initz_lock); /* Control initializations */ 487 KMP_BOOTSTRAP_LOCK_INIT(__kmp_forkjoin_lock); /* control fork/join access */ 488 KMP_BOOTSTRAP_LOCK_INIT(__kmp_exit_lock); /* exit() is not always thread-safe */ 489 #if KMP_USE_MONITOR 490 /* control monitor thread creation */ 491 KMP_BOOTSTRAP_LOCK_INIT(__kmp_monitor_lock); 492 #endif 493 /* used for the hack to allow threadprivate cache and __kmp_threads expansion 494 to co-exist */ 495 KMP_BOOTSTRAP_LOCK_INIT(__kmp_tp_cached_lock); 496 497 KMP_ALIGN(128) 498 KMP_LOCK_INIT(__kmp_global_lock); /* Control OS/global access */ 499 KMP_ALIGN(128) 500 kmp_queuing_lock_t __kmp_dispatch_lock; /* Control dispatch access */ 501 KMP_ALIGN(128) 502 KMP_LOCK_INIT(__kmp_debug_lock); /* Control I/O access for KMP_DEBUG */ 503 #endif 504 505 /* ----------------------------------------------- */ 506 507 #if KMP_HANDLE_SIGNALS 508 /* Signal handling is disabled by default, because it confuses users: In case of 509 sigsegv (or other trouble) in user code signal handler catches the signal, 510 which then "appears" in the monitor thread (when the monitor executes raise() 511 function). Users see signal in the monitor thread and blame OpenMP RTL. 512 513 Grant said signal handling required on some older OSes (Irix?) supported by 514 KAI, because bad applications hung but not aborted. Currently it is not a 515 problem for Linux* OS, OS X* and Windows* OS. 516 517 Grant: Found new hangs for EL4, EL5, and a Fedora Core machine. So I'm 518 putting the default back for now to see if that fixes hangs on those 519 machines. 520 521 2010-04013 Lev: It was a bug in Fortran RTL. Fortran RTL prints a kind of 522 stack backtrace when program is aborting, but the code is not signal-safe. 523 When multiple signals raised at the same time (which occurs in dynamic 524 negative tests because all the worker threads detects the same error), 525 Fortran RTL may hang. The bug finally fixed in Fortran RTL library provided 526 by Steve R., and will be available soon. */ 527 int __kmp_handle_signals = FALSE; 528 #endif 529 530 #ifdef DEBUG_SUSPEND 531 int get_suspend_count_(void) { 532 int count = __kmp_suspend_count; 533 __kmp_suspend_count = 0; 534 return count; 535 } 536 void set_suspend_count_(int *value) { __kmp_suspend_count = *value; } 537 #endif 538 539 // Symbols for MS mutual detection. 540 int _You_must_link_with_exactly_one_OpenMP_library = 1; 541 int _You_must_link_with_Intel_OpenMP_library = 1; 542 #if KMP_OS_WINDOWS && (KMP_VERSION_MAJOR > 4) 543 int _You_must_link_with_Microsoft_OpenMP_library = 1; 544 #endif 545 546 kmp_target_offload_kind_t __kmp_target_offload = tgt_default; 547 548 // OMP Pause Resources 549 kmp_pause_status_t __kmp_pause_status = kmp_not_paused; 550 551 // Nesting mode 552 int __kmp_nesting_mode = 0; 553 int __kmp_nesting_mode_nlevels = 1; 554 int *__kmp_nesting_nth_level; 555 556 // end of file // 557