1 /* 2 * builtin-stat.c 3 * 4 * Builtin stat command: Give a precise performance counters summary 5 * overview about any workload, CPU or specific PID. 6 * 7 * Sample output: 8 9 $ perf stat ./hackbench 10 10 11 Time: 0.118 12 13 Performance counter stats for './hackbench 10': 14 15 1708.761321 task-clock # 11.037 CPUs utilized 16 41,190 context-switches # 0.024 M/sec 17 6,735 CPU-migrations # 0.004 M/sec 18 17,318 page-faults # 0.010 M/sec 19 5,205,202,243 cycles # 3.046 GHz 20 3,856,436,920 stalled-cycles-frontend # 74.09% frontend cycles idle 21 1,600,790,871 stalled-cycles-backend # 30.75% backend cycles idle 22 2,603,501,247 instructions # 0.50 insns per cycle 23 # 1.48 stalled cycles per insn 24 484,357,498 branches # 283.455 M/sec 25 6,388,934 branch-misses # 1.32% of all branches 26 27 0.154822978 seconds time elapsed 28 29 * 30 * Copyright (C) 2008-2011, Red Hat Inc, Ingo Molnar <mingo@redhat.com> 31 * 32 * Improvements and fixes by: 33 * 34 * Arjan van de Ven <arjan@linux.intel.com> 35 * Yanmin Zhang <yanmin.zhang@intel.com> 36 * Wu Fengguang <fengguang.wu@intel.com> 37 * Mike Galbraith <efault@gmx.de> 38 * Paul Mackerras <paulus@samba.org> 39 * Jaswinder Singh Rajput <jaswinder@kernel.org> 40 * 41 * Released under the GPL v2. (and only v2, not any later version) 42 */ 43 44 #include "perf.h" 45 #include "builtin.h" 46 #include "util/util.h" 47 #include "util/parse-options.h" 48 #include "util/parse-events.h" 49 #include "util/event.h" 50 #include "util/evlist.h" 51 #include "util/evsel.h" 52 #include "util/debug.h" 53 #include "util/color.h" 54 #include "util/header.h" 55 #include "util/cpumap.h" 56 #include "util/thread.h" 57 #include "util/thread_map.h" 58 59 #include <sys/prctl.h> 60 #include <math.h> 61 #include <locale.h> 62 63 #define DEFAULT_SEPARATOR " " 64 #define CNTR_NOT_SUPPORTED "<not supported>" 65 #define CNTR_NOT_COUNTED "<not counted>" 66 67 static struct perf_event_attr default_attrs[] = { 68 69 { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_TASK_CLOCK }, 70 { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_CONTEXT_SWITCHES }, 71 { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_CPU_MIGRATIONS }, 72 { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_PAGE_FAULTS }, 73 74 { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_CPU_CYCLES }, 75 { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_STALLED_CYCLES_FRONTEND }, 76 { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_STALLED_CYCLES_BACKEND }, 77 { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_INSTRUCTIONS }, 78 { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_BRANCH_INSTRUCTIONS }, 79 { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_BRANCH_MISSES }, 80 81 }; 82 83 /* 84 * Detailed stats (-d), covering the L1 and last level data caches: 85 */ 86 static struct perf_event_attr detailed_attrs[] = { 87 88 { .type = PERF_TYPE_HW_CACHE, 89 .config = 90 PERF_COUNT_HW_CACHE_L1D << 0 | 91 (PERF_COUNT_HW_CACHE_OP_READ << 8) | 92 (PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16) }, 93 94 { .type = PERF_TYPE_HW_CACHE, 95 .config = 96 PERF_COUNT_HW_CACHE_L1D << 0 | 97 (PERF_COUNT_HW_CACHE_OP_READ << 8) | 98 (PERF_COUNT_HW_CACHE_RESULT_MISS << 16) }, 99 100 { .type = PERF_TYPE_HW_CACHE, 101 .config = 102 PERF_COUNT_HW_CACHE_LL << 0 | 103 (PERF_COUNT_HW_CACHE_OP_READ << 8) | 104 (PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16) }, 105 106 { .type = PERF_TYPE_HW_CACHE, 107 .config = 108 PERF_COUNT_HW_CACHE_LL << 0 | 109 (PERF_COUNT_HW_CACHE_OP_READ << 8) | 110 (PERF_COUNT_HW_CACHE_RESULT_MISS << 16) }, 111 }; 112 113 /* 114 * Very detailed stats (-d -d), covering the instruction cache and the TLB caches: 115 */ 116 static struct perf_event_attr very_detailed_attrs[] = { 117 118 { .type = PERF_TYPE_HW_CACHE, 119 .config = 120 PERF_COUNT_HW_CACHE_L1I << 0 | 121 (PERF_COUNT_HW_CACHE_OP_READ << 8) | 122 (PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16) }, 123 124 { .type = PERF_TYPE_HW_CACHE, 125 .config = 126 PERF_COUNT_HW_CACHE_L1I << 0 | 127 (PERF_COUNT_HW_CACHE_OP_READ << 8) | 128 (PERF_COUNT_HW_CACHE_RESULT_MISS << 16) }, 129 130 { .type = PERF_TYPE_HW_CACHE, 131 .config = 132 PERF_COUNT_HW_CACHE_DTLB << 0 | 133 (PERF_COUNT_HW_CACHE_OP_READ << 8) | 134 (PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16) }, 135 136 { .type = PERF_TYPE_HW_CACHE, 137 .config = 138 PERF_COUNT_HW_CACHE_DTLB << 0 | 139 (PERF_COUNT_HW_CACHE_OP_READ << 8) | 140 (PERF_COUNT_HW_CACHE_RESULT_MISS << 16) }, 141 142 { .type = PERF_TYPE_HW_CACHE, 143 .config = 144 PERF_COUNT_HW_CACHE_ITLB << 0 | 145 (PERF_COUNT_HW_CACHE_OP_READ << 8) | 146 (PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16) }, 147 148 { .type = PERF_TYPE_HW_CACHE, 149 .config = 150 PERF_COUNT_HW_CACHE_ITLB << 0 | 151 (PERF_COUNT_HW_CACHE_OP_READ << 8) | 152 (PERF_COUNT_HW_CACHE_RESULT_MISS << 16) }, 153 154 }; 155 156 /* 157 * Very, very detailed stats (-d -d -d), adding prefetch events: 158 */ 159 static struct perf_event_attr very_very_detailed_attrs[] = { 160 161 { .type = PERF_TYPE_HW_CACHE, 162 .config = 163 PERF_COUNT_HW_CACHE_L1D << 0 | 164 (PERF_COUNT_HW_CACHE_OP_PREFETCH << 8) | 165 (PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16) }, 166 167 { .type = PERF_TYPE_HW_CACHE, 168 .config = 169 PERF_COUNT_HW_CACHE_L1D << 0 | 170 (PERF_COUNT_HW_CACHE_OP_PREFETCH << 8) | 171 (PERF_COUNT_HW_CACHE_RESULT_MISS << 16) }, 172 }; 173 174 175 176 struct perf_evlist *evsel_list; 177 178 static bool system_wide = false; 179 static int run_idx = 0; 180 181 static int run_count = 1; 182 static bool no_inherit = false; 183 static bool scale = true; 184 static bool no_aggr = false; 185 static pid_t target_pid = -1; 186 static pid_t target_tid = -1; 187 static pid_t child_pid = -1; 188 static bool null_run = false; 189 static int detailed_run = 0; 190 static bool sync_run = false; 191 static bool big_num = true; 192 static int big_num_opt = -1; 193 static const char *cpu_list; 194 static const char *csv_sep = NULL; 195 static bool csv_output = false; 196 static bool group = false; 197 static const char *output_name = NULL; 198 static FILE *output = NULL; 199 static int output_fd; 200 201 static volatile int done = 0; 202 203 struct stats 204 { 205 double n, mean, M2; 206 }; 207 208 struct perf_stat { 209 struct stats res_stats[3]; 210 }; 211 212 static int perf_evsel__alloc_stat_priv(struct perf_evsel *evsel) 213 { 214 evsel->priv = zalloc(sizeof(struct perf_stat)); 215 return evsel->priv == NULL ? -ENOMEM : 0; 216 } 217 218 static void perf_evsel__free_stat_priv(struct perf_evsel *evsel) 219 { 220 free(evsel->priv); 221 evsel->priv = NULL; 222 } 223 224 static void update_stats(struct stats *stats, u64 val) 225 { 226 double delta; 227 228 stats->n++; 229 delta = val - stats->mean; 230 stats->mean += delta / stats->n; 231 stats->M2 += delta*(val - stats->mean); 232 } 233 234 static double avg_stats(struct stats *stats) 235 { 236 return stats->mean; 237 } 238 239 /* 240 * http://en.wikipedia.org/wiki/Algorithms_for_calculating_variance 241 * 242 * (\Sum n_i^2) - ((\Sum n_i)^2)/n 243 * s^2 = ------------------------------- 244 * n - 1 245 * 246 * http://en.wikipedia.org/wiki/Stddev 247 * 248 * The std dev of the mean is related to the std dev by: 249 * 250 * s 251 * s_mean = ------- 252 * sqrt(n) 253 * 254 */ 255 static double stddev_stats(struct stats *stats) 256 { 257 double variance, variance_mean; 258 259 if (!stats->n) 260 return 0.0; 261 262 variance = stats->M2 / (stats->n - 1); 263 variance_mean = variance / stats->n; 264 265 return sqrt(variance_mean); 266 } 267 268 struct stats runtime_nsecs_stats[MAX_NR_CPUS]; 269 struct stats runtime_cycles_stats[MAX_NR_CPUS]; 270 struct stats runtime_stalled_cycles_front_stats[MAX_NR_CPUS]; 271 struct stats runtime_stalled_cycles_back_stats[MAX_NR_CPUS]; 272 struct stats runtime_branches_stats[MAX_NR_CPUS]; 273 struct stats runtime_cacherefs_stats[MAX_NR_CPUS]; 274 struct stats runtime_l1_dcache_stats[MAX_NR_CPUS]; 275 struct stats runtime_l1_icache_stats[MAX_NR_CPUS]; 276 struct stats runtime_ll_cache_stats[MAX_NR_CPUS]; 277 struct stats runtime_itlb_cache_stats[MAX_NR_CPUS]; 278 struct stats runtime_dtlb_cache_stats[MAX_NR_CPUS]; 279 struct stats walltime_nsecs_stats; 280 281 static int create_perf_stat_counter(struct perf_evsel *evsel) 282 { 283 struct perf_event_attr *attr = &evsel->attr; 284 285 if (scale) 286 attr->read_format = PERF_FORMAT_TOTAL_TIME_ENABLED | 287 PERF_FORMAT_TOTAL_TIME_RUNNING; 288 289 attr->inherit = !no_inherit; 290 291 if (system_wide) 292 return perf_evsel__open_per_cpu(evsel, evsel_list->cpus, group); 293 294 if (target_pid == -1 && target_tid == -1) { 295 attr->disabled = 1; 296 attr->enable_on_exec = 1; 297 } 298 299 return perf_evsel__open_per_thread(evsel, evsel_list->threads, group); 300 } 301 302 /* 303 * Does the counter have nsecs as a unit? 304 */ 305 static inline int nsec_counter(struct perf_evsel *evsel) 306 { 307 if (perf_evsel__match(evsel, SOFTWARE, SW_CPU_CLOCK) || 308 perf_evsel__match(evsel, SOFTWARE, SW_TASK_CLOCK)) 309 return 1; 310 311 return 0; 312 } 313 314 /* 315 * Update various tracking values we maintain to print 316 * more semantic information such as miss/hit ratios, 317 * instruction rates, etc: 318 */ 319 static void update_shadow_stats(struct perf_evsel *counter, u64 *count) 320 { 321 if (perf_evsel__match(counter, SOFTWARE, SW_TASK_CLOCK)) 322 update_stats(&runtime_nsecs_stats[0], count[0]); 323 else if (perf_evsel__match(counter, HARDWARE, HW_CPU_CYCLES)) 324 update_stats(&runtime_cycles_stats[0], count[0]); 325 else if (perf_evsel__match(counter, HARDWARE, HW_STALLED_CYCLES_FRONTEND)) 326 update_stats(&runtime_stalled_cycles_front_stats[0], count[0]); 327 else if (perf_evsel__match(counter, HARDWARE, HW_STALLED_CYCLES_BACKEND)) 328 update_stats(&runtime_stalled_cycles_back_stats[0], count[0]); 329 else if (perf_evsel__match(counter, HARDWARE, HW_BRANCH_INSTRUCTIONS)) 330 update_stats(&runtime_branches_stats[0], count[0]); 331 else if (perf_evsel__match(counter, HARDWARE, HW_CACHE_REFERENCES)) 332 update_stats(&runtime_cacherefs_stats[0], count[0]); 333 else if (perf_evsel__match(counter, HW_CACHE, HW_CACHE_L1D)) 334 update_stats(&runtime_l1_dcache_stats[0], count[0]); 335 else if (perf_evsel__match(counter, HW_CACHE, HW_CACHE_L1I)) 336 update_stats(&runtime_l1_icache_stats[0], count[0]); 337 else if (perf_evsel__match(counter, HW_CACHE, HW_CACHE_LL)) 338 update_stats(&runtime_ll_cache_stats[0], count[0]); 339 else if (perf_evsel__match(counter, HW_CACHE, HW_CACHE_DTLB)) 340 update_stats(&runtime_dtlb_cache_stats[0], count[0]); 341 else if (perf_evsel__match(counter, HW_CACHE, HW_CACHE_ITLB)) 342 update_stats(&runtime_itlb_cache_stats[0], count[0]); 343 } 344 345 /* 346 * Read out the results of a single counter: 347 * aggregate counts across CPUs in system-wide mode 348 */ 349 static int read_counter_aggr(struct perf_evsel *counter) 350 { 351 struct perf_stat *ps = counter->priv; 352 u64 *count = counter->counts->aggr.values; 353 int i; 354 355 if (__perf_evsel__read(counter, evsel_list->cpus->nr, 356 evsel_list->threads->nr, scale) < 0) 357 return -1; 358 359 for (i = 0; i < 3; i++) 360 update_stats(&ps->res_stats[i], count[i]); 361 362 if (verbose) { 363 fprintf(output, "%s: %" PRIu64 " %" PRIu64 " %" PRIu64 "\n", 364 event_name(counter), count[0], count[1], count[2]); 365 } 366 367 /* 368 * Save the full runtime - to allow normalization during printout: 369 */ 370 update_shadow_stats(counter, count); 371 372 return 0; 373 } 374 375 /* 376 * Read out the results of a single counter: 377 * do not aggregate counts across CPUs in system-wide mode 378 */ 379 static int read_counter(struct perf_evsel *counter) 380 { 381 u64 *count; 382 int cpu; 383 384 for (cpu = 0; cpu < evsel_list->cpus->nr; cpu++) { 385 if (__perf_evsel__read_on_cpu(counter, cpu, 0, scale) < 0) 386 return -1; 387 388 count = counter->counts->cpu[cpu].values; 389 390 update_shadow_stats(counter, count); 391 } 392 393 return 0; 394 } 395 396 static int run_perf_stat(int argc __used, const char **argv) 397 { 398 unsigned long long t0, t1; 399 struct perf_evsel *counter; 400 int status = 0; 401 int child_ready_pipe[2], go_pipe[2]; 402 const bool forks = (argc > 0); 403 char buf; 404 405 if (forks && (pipe(child_ready_pipe) < 0 || pipe(go_pipe) < 0)) { 406 perror("failed to create pipes"); 407 exit(1); 408 } 409 410 if (forks) { 411 if ((child_pid = fork()) < 0) 412 perror("failed to fork"); 413 414 if (!child_pid) { 415 close(child_ready_pipe[0]); 416 close(go_pipe[1]); 417 fcntl(go_pipe[0], F_SETFD, FD_CLOEXEC); 418 419 /* 420 * Do a dummy execvp to get the PLT entry resolved, 421 * so we avoid the resolver overhead on the real 422 * execvp call. 423 */ 424 execvp("", (char **)argv); 425 426 /* 427 * Tell the parent we're ready to go 428 */ 429 close(child_ready_pipe[1]); 430 431 /* 432 * Wait until the parent tells us to go. 433 */ 434 if (read(go_pipe[0], &buf, 1) == -1) 435 perror("unable to read pipe"); 436 437 execvp(argv[0], (char **)argv); 438 439 perror(argv[0]); 440 exit(-1); 441 } 442 443 if (target_tid == -1 && target_pid == -1 && !system_wide) 444 evsel_list->threads->map[0] = child_pid; 445 446 /* 447 * Wait for the child to be ready to exec. 448 */ 449 close(child_ready_pipe[1]); 450 close(go_pipe[0]); 451 if (read(child_ready_pipe[0], &buf, 1) == -1) 452 perror("unable to read pipe"); 453 close(child_ready_pipe[0]); 454 } 455 456 list_for_each_entry(counter, &evsel_list->entries, node) { 457 if (create_perf_stat_counter(counter) < 0) { 458 if (errno == EINVAL || errno == ENOSYS || errno == ENOENT) { 459 if (verbose) 460 ui__warning("%s event is not supported by the kernel.\n", 461 event_name(counter)); 462 counter->supported = false; 463 continue; 464 } 465 466 if (errno == EPERM || errno == EACCES) { 467 error("You may not have permission to collect %sstats.\n" 468 "\t Consider tweaking" 469 " /proc/sys/kernel/perf_event_paranoid or running as root.", 470 system_wide ? "system-wide " : ""); 471 } else { 472 error("open_counter returned with %d (%s). " 473 "/bin/dmesg may provide additional information.\n", 474 errno, strerror(errno)); 475 } 476 if (child_pid != -1) 477 kill(child_pid, SIGTERM); 478 die("Not all events could be opened.\n"); 479 return -1; 480 } 481 counter->supported = true; 482 } 483 484 if (perf_evlist__set_filters(evsel_list)) { 485 error("failed to set filter with %d (%s)\n", errno, 486 strerror(errno)); 487 return -1; 488 } 489 490 /* 491 * Enable counters and exec the command: 492 */ 493 t0 = rdclock(); 494 495 if (forks) { 496 close(go_pipe[1]); 497 wait(&status); 498 if (WIFSIGNALED(status)) 499 psignal(WTERMSIG(status), argv[0]); 500 } else { 501 while(!done) sleep(1); 502 } 503 504 t1 = rdclock(); 505 506 update_stats(&walltime_nsecs_stats, t1 - t0); 507 508 if (no_aggr) { 509 list_for_each_entry(counter, &evsel_list->entries, node) { 510 read_counter(counter); 511 perf_evsel__close_fd(counter, evsel_list->cpus->nr, 1); 512 } 513 } else { 514 list_for_each_entry(counter, &evsel_list->entries, node) { 515 read_counter_aggr(counter); 516 perf_evsel__close_fd(counter, evsel_list->cpus->nr, 517 evsel_list->threads->nr); 518 } 519 } 520 521 return WEXITSTATUS(status); 522 } 523 524 static void print_noise_pct(double total, double avg) 525 { 526 double pct = 0.0; 527 528 if (avg) 529 pct = 100.0*total/avg; 530 531 if (csv_output) 532 fprintf(output, "%s%.2f%%", csv_sep, pct); 533 else if (pct) 534 fprintf(output, " ( +-%6.2f%% )", pct); 535 } 536 537 static void print_noise(struct perf_evsel *evsel, double avg) 538 { 539 struct perf_stat *ps; 540 541 if (run_count == 1) 542 return; 543 544 ps = evsel->priv; 545 print_noise_pct(stddev_stats(&ps->res_stats[0]), avg); 546 } 547 548 static void nsec_printout(int cpu, struct perf_evsel *evsel, double avg) 549 { 550 double msecs = avg / 1e6; 551 char cpustr[16] = { '\0', }; 552 const char *fmt = csv_output ? "%s%.6f%s%s" : "%s%18.6f%s%-25s"; 553 554 if (no_aggr) 555 sprintf(cpustr, "CPU%*d%s", 556 csv_output ? 0 : -4, 557 evsel_list->cpus->map[cpu], csv_sep); 558 559 fprintf(output, fmt, cpustr, msecs, csv_sep, event_name(evsel)); 560 561 if (evsel->cgrp) 562 fprintf(output, "%s%s", csv_sep, evsel->cgrp->name); 563 564 if (csv_output) 565 return; 566 567 if (perf_evsel__match(evsel, SOFTWARE, SW_TASK_CLOCK)) 568 fprintf(output, " # %8.3f CPUs utilized ", 569 avg / avg_stats(&walltime_nsecs_stats)); 570 } 571 572 static void print_stalled_cycles_frontend(int cpu, struct perf_evsel *evsel __used, double avg) 573 { 574 double total, ratio = 0.0; 575 const char *color; 576 577 total = avg_stats(&runtime_cycles_stats[cpu]); 578 579 if (total) 580 ratio = avg / total * 100.0; 581 582 color = PERF_COLOR_NORMAL; 583 if (ratio > 50.0) 584 color = PERF_COLOR_RED; 585 else if (ratio > 30.0) 586 color = PERF_COLOR_MAGENTA; 587 else if (ratio > 10.0) 588 color = PERF_COLOR_YELLOW; 589 590 fprintf(output, " # "); 591 color_fprintf(output, color, "%6.2f%%", ratio); 592 fprintf(output, " frontend cycles idle "); 593 } 594 595 static void print_stalled_cycles_backend(int cpu, struct perf_evsel *evsel __used, double avg) 596 { 597 double total, ratio = 0.0; 598 const char *color; 599 600 total = avg_stats(&runtime_cycles_stats[cpu]); 601 602 if (total) 603 ratio = avg / total * 100.0; 604 605 color = PERF_COLOR_NORMAL; 606 if (ratio > 75.0) 607 color = PERF_COLOR_RED; 608 else if (ratio > 50.0) 609 color = PERF_COLOR_MAGENTA; 610 else if (ratio > 20.0) 611 color = PERF_COLOR_YELLOW; 612 613 fprintf(output, " # "); 614 color_fprintf(output, color, "%6.2f%%", ratio); 615 fprintf(output, " backend cycles idle "); 616 } 617 618 static void print_branch_misses(int cpu, struct perf_evsel *evsel __used, double avg) 619 { 620 double total, ratio = 0.0; 621 const char *color; 622 623 total = avg_stats(&runtime_branches_stats[cpu]); 624 625 if (total) 626 ratio = avg / total * 100.0; 627 628 color = PERF_COLOR_NORMAL; 629 if (ratio > 20.0) 630 color = PERF_COLOR_RED; 631 else if (ratio > 10.0) 632 color = PERF_COLOR_MAGENTA; 633 else if (ratio > 5.0) 634 color = PERF_COLOR_YELLOW; 635 636 fprintf(output, " # "); 637 color_fprintf(output, color, "%6.2f%%", ratio); 638 fprintf(output, " of all branches "); 639 } 640 641 static void print_l1_dcache_misses(int cpu, struct perf_evsel *evsel __used, double avg) 642 { 643 double total, ratio = 0.0; 644 const char *color; 645 646 total = avg_stats(&runtime_l1_dcache_stats[cpu]); 647 648 if (total) 649 ratio = avg / total * 100.0; 650 651 color = PERF_COLOR_NORMAL; 652 if (ratio > 20.0) 653 color = PERF_COLOR_RED; 654 else if (ratio > 10.0) 655 color = PERF_COLOR_MAGENTA; 656 else if (ratio > 5.0) 657 color = PERF_COLOR_YELLOW; 658 659 fprintf(output, " # "); 660 color_fprintf(output, color, "%6.2f%%", ratio); 661 fprintf(output, " of all L1-dcache hits "); 662 } 663 664 static void print_l1_icache_misses(int cpu, struct perf_evsel *evsel __used, double avg) 665 { 666 double total, ratio = 0.0; 667 const char *color; 668 669 total = avg_stats(&runtime_l1_icache_stats[cpu]); 670 671 if (total) 672 ratio = avg / total * 100.0; 673 674 color = PERF_COLOR_NORMAL; 675 if (ratio > 20.0) 676 color = PERF_COLOR_RED; 677 else if (ratio > 10.0) 678 color = PERF_COLOR_MAGENTA; 679 else if (ratio > 5.0) 680 color = PERF_COLOR_YELLOW; 681 682 fprintf(output, " # "); 683 color_fprintf(output, color, "%6.2f%%", ratio); 684 fprintf(output, " of all L1-icache hits "); 685 } 686 687 static void print_dtlb_cache_misses(int cpu, struct perf_evsel *evsel __used, double avg) 688 { 689 double total, ratio = 0.0; 690 const char *color; 691 692 total = avg_stats(&runtime_dtlb_cache_stats[cpu]); 693 694 if (total) 695 ratio = avg / total * 100.0; 696 697 color = PERF_COLOR_NORMAL; 698 if (ratio > 20.0) 699 color = PERF_COLOR_RED; 700 else if (ratio > 10.0) 701 color = PERF_COLOR_MAGENTA; 702 else if (ratio > 5.0) 703 color = PERF_COLOR_YELLOW; 704 705 fprintf(output, " # "); 706 color_fprintf(output, color, "%6.2f%%", ratio); 707 fprintf(output, " of all dTLB cache hits "); 708 } 709 710 static void print_itlb_cache_misses(int cpu, struct perf_evsel *evsel __used, double avg) 711 { 712 double total, ratio = 0.0; 713 const char *color; 714 715 total = avg_stats(&runtime_itlb_cache_stats[cpu]); 716 717 if (total) 718 ratio = avg / total * 100.0; 719 720 color = PERF_COLOR_NORMAL; 721 if (ratio > 20.0) 722 color = PERF_COLOR_RED; 723 else if (ratio > 10.0) 724 color = PERF_COLOR_MAGENTA; 725 else if (ratio > 5.0) 726 color = PERF_COLOR_YELLOW; 727 728 fprintf(output, " # "); 729 color_fprintf(output, color, "%6.2f%%", ratio); 730 fprintf(output, " of all iTLB cache hits "); 731 } 732 733 static void print_ll_cache_misses(int cpu, struct perf_evsel *evsel __used, double avg) 734 { 735 double total, ratio = 0.0; 736 const char *color; 737 738 total = avg_stats(&runtime_ll_cache_stats[cpu]); 739 740 if (total) 741 ratio = avg / total * 100.0; 742 743 color = PERF_COLOR_NORMAL; 744 if (ratio > 20.0) 745 color = PERF_COLOR_RED; 746 else if (ratio > 10.0) 747 color = PERF_COLOR_MAGENTA; 748 else if (ratio > 5.0) 749 color = PERF_COLOR_YELLOW; 750 751 fprintf(output, " # "); 752 color_fprintf(output, color, "%6.2f%%", ratio); 753 fprintf(output, " of all LL-cache hits "); 754 } 755 756 static void abs_printout(int cpu, struct perf_evsel *evsel, double avg) 757 { 758 double total, ratio = 0.0; 759 char cpustr[16] = { '\0', }; 760 const char *fmt; 761 762 if (csv_output) 763 fmt = "%s%.0f%s%s"; 764 else if (big_num) 765 fmt = "%s%'18.0f%s%-25s"; 766 else 767 fmt = "%s%18.0f%s%-25s"; 768 769 if (no_aggr) 770 sprintf(cpustr, "CPU%*d%s", 771 csv_output ? 0 : -4, 772 evsel_list->cpus->map[cpu], csv_sep); 773 else 774 cpu = 0; 775 776 fprintf(output, fmt, cpustr, avg, csv_sep, event_name(evsel)); 777 778 if (evsel->cgrp) 779 fprintf(output, "%s%s", csv_sep, evsel->cgrp->name); 780 781 if (csv_output) 782 return; 783 784 if (perf_evsel__match(evsel, HARDWARE, HW_INSTRUCTIONS)) { 785 total = avg_stats(&runtime_cycles_stats[cpu]); 786 787 if (total) 788 ratio = avg / total; 789 790 fprintf(output, " # %5.2f insns per cycle ", ratio); 791 792 total = avg_stats(&runtime_stalled_cycles_front_stats[cpu]); 793 total = max(total, avg_stats(&runtime_stalled_cycles_back_stats[cpu])); 794 795 if (total && avg) { 796 ratio = total / avg; 797 fprintf(output, "\n # %5.2f stalled cycles per insn", ratio); 798 } 799 800 } else if (perf_evsel__match(evsel, HARDWARE, HW_BRANCH_MISSES) && 801 runtime_branches_stats[cpu].n != 0) { 802 print_branch_misses(cpu, evsel, avg); 803 } else if ( 804 evsel->attr.type == PERF_TYPE_HW_CACHE && 805 evsel->attr.config == ( PERF_COUNT_HW_CACHE_L1D | 806 ((PERF_COUNT_HW_CACHE_OP_READ) << 8) | 807 ((PERF_COUNT_HW_CACHE_RESULT_MISS) << 16)) && 808 runtime_l1_dcache_stats[cpu].n != 0) { 809 print_l1_dcache_misses(cpu, evsel, avg); 810 } else if ( 811 evsel->attr.type == PERF_TYPE_HW_CACHE && 812 evsel->attr.config == ( PERF_COUNT_HW_CACHE_L1I | 813 ((PERF_COUNT_HW_CACHE_OP_READ) << 8) | 814 ((PERF_COUNT_HW_CACHE_RESULT_MISS) << 16)) && 815 runtime_l1_icache_stats[cpu].n != 0) { 816 print_l1_icache_misses(cpu, evsel, avg); 817 } else if ( 818 evsel->attr.type == PERF_TYPE_HW_CACHE && 819 evsel->attr.config == ( PERF_COUNT_HW_CACHE_DTLB | 820 ((PERF_COUNT_HW_CACHE_OP_READ) << 8) | 821 ((PERF_COUNT_HW_CACHE_RESULT_MISS) << 16)) && 822 runtime_dtlb_cache_stats[cpu].n != 0) { 823 print_dtlb_cache_misses(cpu, evsel, avg); 824 } else if ( 825 evsel->attr.type == PERF_TYPE_HW_CACHE && 826 evsel->attr.config == ( PERF_COUNT_HW_CACHE_ITLB | 827 ((PERF_COUNT_HW_CACHE_OP_READ) << 8) | 828 ((PERF_COUNT_HW_CACHE_RESULT_MISS) << 16)) && 829 runtime_itlb_cache_stats[cpu].n != 0) { 830 print_itlb_cache_misses(cpu, evsel, avg); 831 } else if ( 832 evsel->attr.type == PERF_TYPE_HW_CACHE && 833 evsel->attr.config == ( PERF_COUNT_HW_CACHE_LL | 834 ((PERF_COUNT_HW_CACHE_OP_READ) << 8) | 835 ((PERF_COUNT_HW_CACHE_RESULT_MISS) << 16)) && 836 runtime_ll_cache_stats[cpu].n != 0) { 837 print_ll_cache_misses(cpu, evsel, avg); 838 } else if (perf_evsel__match(evsel, HARDWARE, HW_CACHE_MISSES) && 839 runtime_cacherefs_stats[cpu].n != 0) { 840 total = avg_stats(&runtime_cacherefs_stats[cpu]); 841 842 if (total) 843 ratio = avg * 100 / total; 844 845 fprintf(output, " # %8.3f %% of all cache refs ", ratio); 846 847 } else if (perf_evsel__match(evsel, HARDWARE, HW_STALLED_CYCLES_FRONTEND)) { 848 print_stalled_cycles_frontend(cpu, evsel, avg); 849 } else if (perf_evsel__match(evsel, HARDWARE, HW_STALLED_CYCLES_BACKEND)) { 850 print_stalled_cycles_backend(cpu, evsel, avg); 851 } else if (perf_evsel__match(evsel, HARDWARE, HW_CPU_CYCLES)) { 852 total = avg_stats(&runtime_nsecs_stats[cpu]); 853 854 if (total) 855 ratio = 1.0 * avg / total; 856 857 fprintf(output, " # %8.3f GHz ", ratio); 858 } else if (runtime_nsecs_stats[cpu].n != 0) { 859 total = avg_stats(&runtime_nsecs_stats[cpu]); 860 861 if (total) 862 ratio = 1000.0 * avg / total; 863 864 fprintf(output, " # %8.3f M/sec ", ratio); 865 } else { 866 fprintf(output, " "); 867 } 868 } 869 870 /* 871 * Print out the results of a single counter: 872 * aggregated counts in system-wide mode 873 */ 874 static void print_counter_aggr(struct perf_evsel *counter) 875 { 876 struct perf_stat *ps = counter->priv; 877 double avg = avg_stats(&ps->res_stats[0]); 878 int scaled = counter->counts->scaled; 879 880 if (scaled == -1) { 881 fprintf(output, "%*s%s%*s", 882 csv_output ? 0 : 18, 883 counter->supported ? CNTR_NOT_COUNTED : CNTR_NOT_SUPPORTED, 884 csv_sep, 885 csv_output ? 0 : -24, 886 event_name(counter)); 887 888 if (counter->cgrp) 889 fprintf(output, "%s%s", csv_sep, counter->cgrp->name); 890 891 fputc('\n', output); 892 return; 893 } 894 895 if (nsec_counter(counter)) 896 nsec_printout(-1, counter, avg); 897 else 898 abs_printout(-1, counter, avg); 899 900 print_noise(counter, avg); 901 902 if (csv_output) { 903 fputc('\n', output); 904 return; 905 } 906 907 if (scaled) { 908 double avg_enabled, avg_running; 909 910 avg_enabled = avg_stats(&ps->res_stats[1]); 911 avg_running = avg_stats(&ps->res_stats[2]); 912 913 fprintf(output, " [%5.2f%%]", 100 * avg_running / avg_enabled); 914 } 915 fprintf(output, "\n"); 916 } 917 918 /* 919 * Print out the results of a single counter: 920 * does not use aggregated count in system-wide 921 */ 922 static void print_counter(struct perf_evsel *counter) 923 { 924 u64 ena, run, val; 925 int cpu; 926 927 for (cpu = 0; cpu < evsel_list->cpus->nr; cpu++) { 928 val = counter->counts->cpu[cpu].val; 929 ena = counter->counts->cpu[cpu].ena; 930 run = counter->counts->cpu[cpu].run; 931 if (run == 0 || ena == 0) { 932 fprintf(output, "CPU%*d%s%*s%s%*s", 933 csv_output ? 0 : -4, 934 evsel_list->cpus->map[cpu], csv_sep, 935 csv_output ? 0 : 18, 936 counter->supported ? CNTR_NOT_COUNTED : CNTR_NOT_SUPPORTED, 937 csv_sep, 938 csv_output ? 0 : -24, 939 event_name(counter)); 940 941 if (counter->cgrp) 942 fprintf(output, "%s%s", 943 csv_sep, counter->cgrp->name); 944 945 fputc('\n', output); 946 continue; 947 } 948 949 if (nsec_counter(counter)) 950 nsec_printout(cpu, counter, val); 951 else 952 abs_printout(cpu, counter, val); 953 954 if (!csv_output) { 955 print_noise(counter, 1.0); 956 957 if (run != ena) 958 fprintf(output, " (%.2f%%)", 959 100.0 * run / ena); 960 } 961 fputc('\n', output); 962 } 963 } 964 965 static void print_stat(int argc, const char **argv) 966 { 967 struct perf_evsel *counter; 968 int i; 969 970 fflush(stdout); 971 972 if (!csv_output) { 973 fprintf(output, "\n"); 974 fprintf(output, " Performance counter stats for "); 975 if(target_pid == -1 && target_tid == -1) { 976 fprintf(output, "\'%s", argv[0]); 977 for (i = 1; i < argc; i++) 978 fprintf(output, " %s", argv[i]); 979 } else if (target_pid != -1) 980 fprintf(output, "process id \'%d", target_pid); 981 else 982 fprintf(output, "thread id \'%d", target_tid); 983 984 fprintf(output, "\'"); 985 if (run_count > 1) 986 fprintf(output, " (%d runs)", run_count); 987 fprintf(output, ":\n\n"); 988 } 989 990 if (no_aggr) { 991 list_for_each_entry(counter, &evsel_list->entries, node) 992 print_counter(counter); 993 } else { 994 list_for_each_entry(counter, &evsel_list->entries, node) 995 print_counter_aggr(counter); 996 } 997 998 if (!csv_output) { 999 if (!null_run) 1000 fprintf(output, "\n"); 1001 fprintf(output, " %17.9f seconds time elapsed", 1002 avg_stats(&walltime_nsecs_stats)/1e9); 1003 if (run_count > 1) { 1004 fprintf(output, " "); 1005 print_noise_pct(stddev_stats(&walltime_nsecs_stats), 1006 avg_stats(&walltime_nsecs_stats)); 1007 } 1008 fprintf(output, "\n\n"); 1009 } 1010 } 1011 1012 static volatile int signr = -1; 1013 1014 static void skip_signal(int signo) 1015 { 1016 if(child_pid == -1) 1017 done = 1; 1018 1019 signr = signo; 1020 } 1021 1022 static void sig_atexit(void) 1023 { 1024 if (child_pid != -1) 1025 kill(child_pid, SIGTERM); 1026 1027 if (signr == -1) 1028 return; 1029 1030 signal(signr, SIG_DFL); 1031 kill(getpid(), signr); 1032 } 1033 1034 static const char * const stat_usage[] = { 1035 "perf stat [<options>] [<command>]", 1036 NULL 1037 }; 1038 1039 static int stat__set_big_num(const struct option *opt __used, 1040 const char *s __used, int unset) 1041 { 1042 big_num_opt = unset ? 0 : 1; 1043 return 0; 1044 } 1045 1046 static bool append_file; 1047 1048 static const struct option options[] = { 1049 OPT_CALLBACK('e', "event", &evsel_list, "event", 1050 "event selector. use 'perf list' to list available events", 1051 parse_events_option), 1052 OPT_CALLBACK(0, "filter", &evsel_list, "filter", 1053 "event filter", parse_filter), 1054 OPT_BOOLEAN('i', "no-inherit", &no_inherit, 1055 "child tasks do not inherit counters"), 1056 OPT_INTEGER('p', "pid", &target_pid, 1057 "stat events on existing process id"), 1058 OPT_INTEGER('t', "tid", &target_tid, 1059 "stat events on existing thread id"), 1060 OPT_BOOLEAN('a', "all-cpus", &system_wide, 1061 "system-wide collection from all CPUs"), 1062 OPT_BOOLEAN('g', "group", &group, 1063 "put the counters into a counter group"), 1064 OPT_BOOLEAN('c', "scale", &scale, 1065 "scale/normalize counters"), 1066 OPT_INCR('v', "verbose", &verbose, 1067 "be more verbose (show counter open errors, etc)"), 1068 OPT_INTEGER('r', "repeat", &run_count, 1069 "repeat command and print average + stddev (max: 100)"), 1070 OPT_BOOLEAN('n', "null", &null_run, 1071 "null run - dont start any counters"), 1072 OPT_INCR('d', "detailed", &detailed_run, 1073 "detailed run - start a lot of events"), 1074 OPT_BOOLEAN('S', "sync", &sync_run, 1075 "call sync() before starting a run"), 1076 OPT_CALLBACK_NOOPT('B', "big-num", NULL, NULL, 1077 "print large numbers with thousands\' separators", 1078 stat__set_big_num), 1079 OPT_STRING('C', "cpu", &cpu_list, "cpu", 1080 "list of cpus to monitor in system-wide"), 1081 OPT_BOOLEAN('A', "no-aggr", &no_aggr, 1082 "disable CPU count aggregation"), 1083 OPT_STRING('x', "field-separator", &csv_sep, "separator", 1084 "print counts with custom separator"), 1085 OPT_CALLBACK('G', "cgroup", &evsel_list, "name", 1086 "monitor event in cgroup name only", 1087 parse_cgroups), 1088 OPT_STRING('o', "output", &output_name, "file", 1089 "output file name"), 1090 OPT_BOOLEAN(0, "append", &append_file, "append to the output file"), 1091 OPT_INTEGER(0, "log-fd", &output_fd, 1092 "log output to fd, instead of stderr"), 1093 OPT_END() 1094 }; 1095 1096 /* 1097 * Add default attributes, if there were no attributes specified or 1098 * if -d/--detailed, -d -d or -d -d -d is used: 1099 */ 1100 static int add_default_attributes(void) 1101 { 1102 struct perf_evsel *pos; 1103 size_t attr_nr = 0; 1104 size_t c; 1105 1106 /* Set attrs if no event is selected and !null_run: */ 1107 if (null_run) 1108 return 0; 1109 1110 if (!evsel_list->nr_entries) { 1111 for (c = 0; c < ARRAY_SIZE(default_attrs); c++) { 1112 pos = perf_evsel__new(default_attrs + c, c + attr_nr); 1113 if (pos == NULL) 1114 return -1; 1115 perf_evlist__add(evsel_list, pos); 1116 } 1117 attr_nr += c; 1118 } 1119 1120 /* Detailed events get appended to the event list: */ 1121 1122 if (detailed_run < 1) 1123 return 0; 1124 1125 /* Append detailed run extra attributes: */ 1126 for (c = 0; c < ARRAY_SIZE(detailed_attrs); c++) { 1127 pos = perf_evsel__new(detailed_attrs + c, c + attr_nr); 1128 if (pos == NULL) 1129 return -1; 1130 perf_evlist__add(evsel_list, pos); 1131 } 1132 attr_nr += c; 1133 1134 if (detailed_run < 2) 1135 return 0; 1136 1137 /* Append very detailed run extra attributes: */ 1138 for (c = 0; c < ARRAY_SIZE(very_detailed_attrs); c++) { 1139 pos = perf_evsel__new(very_detailed_attrs + c, c + attr_nr); 1140 if (pos == NULL) 1141 return -1; 1142 perf_evlist__add(evsel_list, pos); 1143 } 1144 1145 if (detailed_run < 3) 1146 return 0; 1147 1148 /* Append very, very detailed run extra attributes: */ 1149 for (c = 0; c < ARRAY_SIZE(very_very_detailed_attrs); c++) { 1150 pos = perf_evsel__new(very_very_detailed_attrs + c, c + attr_nr); 1151 if (pos == NULL) 1152 return -1; 1153 perf_evlist__add(evsel_list, pos); 1154 } 1155 1156 1157 return 0; 1158 } 1159 1160 int cmd_stat(int argc, const char **argv, const char *prefix __used) 1161 { 1162 struct perf_evsel *pos; 1163 int status = -ENOMEM; 1164 const char *mode; 1165 1166 setlocale(LC_ALL, ""); 1167 1168 evsel_list = perf_evlist__new(NULL, NULL); 1169 if (evsel_list == NULL) 1170 return -ENOMEM; 1171 1172 argc = parse_options(argc, argv, options, stat_usage, 1173 PARSE_OPT_STOP_AT_NON_OPTION); 1174 1175 output = stderr; 1176 if (output_name && strcmp(output_name, "-")) 1177 output = NULL; 1178 1179 if (output_name && output_fd) { 1180 fprintf(stderr, "cannot use both --output and --log-fd\n"); 1181 usage_with_options(stat_usage, options); 1182 } 1183 if (!output) { 1184 struct timespec tm; 1185 mode = append_file ? "a" : "w"; 1186 1187 output = fopen(output_name, mode); 1188 if (!output) { 1189 perror("failed to create output file"); 1190 exit(-1); 1191 } 1192 clock_gettime(CLOCK_REALTIME, &tm); 1193 fprintf(output, "# started on %s\n", ctime(&tm.tv_sec)); 1194 } else if (output_fd != 2) { 1195 mode = append_file ? "a" : "w"; 1196 output = fdopen(output_fd, mode); 1197 if (!output) { 1198 perror("Failed opening logfd"); 1199 return -errno; 1200 } 1201 } 1202 1203 if (csv_sep) { 1204 csv_output = true; 1205 if (!strcmp(csv_sep, "\\t")) 1206 csv_sep = "\t"; 1207 } else 1208 csv_sep = DEFAULT_SEPARATOR; 1209 1210 /* 1211 * let the spreadsheet do the pretty-printing 1212 */ 1213 if (csv_output) { 1214 /* User explicitly passed -B? */ 1215 if (big_num_opt == 1) { 1216 fprintf(stderr, "-B option not supported with -x\n"); 1217 usage_with_options(stat_usage, options); 1218 } else /* Nope, so disable big number formatting */ 1219 big_num = false; 1220 } else if (big_num_opt == 0) /* User passed --no-big-num */ 1221 big_num = false; 1222 1223 if (!argc && target_pid == -1 && target_tid == -1) 1224 usage_with_options(stat_usage, options); 1225 if (run_count <= 0) 1226 usage_with_options(stat_usage, options); 1227 1228 /* no_aggr, cgroup are for system-wide only */ 1229 if ((no_aggr || nr_cgroups) && !system_wide) { 1230 fprintf(stderr, "both cgroup and no-aggregation " 1231 "modes only available in system-wide mode\n"); 1232 1233 usage_with_options(stat_usage, options); 1234 } 1235 1236 if (add_default_attributes()) 1237 goto out; 1238 1239 if (target_pid != -1) 1240 target_tid = target_pid; 1241 1242 evsel_list->threads = thread_map__new(target_pid, target_tid); 1243 if (evsel_list->threads == NULL) { 1244 pr_err("Problems finding threads of monitor\n"); 1245 usage_with_options(stat_usage, options); 1246 } 1247 1248 if (system_wide) 1249 evsel_list->cpus = cpu_map__new(cpu_list); 1250 else 1251 evsel_list->cpus = cpu_map__dummy_new(); 1252 1253 if (evsel_list->cpus == NULL) { 1254 perror("failed to parse CPUs map"); 1255 usage_with_options(stat_usage, options); 1256 return -1; 1257 } 1258 1259 list_for_each_entry(pos, &evsel_list->entries, node) { 1260 if (perf_evsel__alloc_stat_priv(pos) < 0 || 1261 perf_evsel__alloc_counts(pos, evsel_list->cpus->nr) < 0 || 1262 perf_evsel__alloc_fd(pos, evsel_list->cpus->nr, evsel_list->threads->nr) < 0) 1263 goto out_free_fd; 1264 } 1265 1266 /* 1267 * We dont want to block the signals - that would cause 1268 * child tasks to inherit that and Ctrl-C would not work. 1269 * What we want is for Ctrl-C to work in the exec()-ed 1270 * task, but being ignored by perf stat itself: 1271 */ 1272 atexit(sig_atexit); 1273 signal(SIGINT, skip_signal); 1274 signal(SIGALRM, skip_signal); 1275 signal(SIGABRT, skip_signal); 1276 1277 status = 0; 1278 for (run_idx = 0; run_idx < run_count; run_idx++) { 1279 if (run_count != 1 && verbose) 1280 fprintf(output, "[ perf stat: executing run #%d ... ]\n", 1281 run_idx + 1); 1282 1283 if (sync_run) 1284 sync(); 1285 1286 status = run_perf_stat(argc, argv); 1287 } 1288 1289 if (status != -1) 1290 print_stat(argc, argv); 1291 out_free_fd: 1292 list_for_each_entry(pos, &evsel_list->entries, node) 1293 perf_evsel__free_stat_priv(pos); 1294 perf_evlist__delete_maps(evsel_list); 1295 out: 1296 perf_evlist__delete(evsel_list); 1297 return status; 1298 } 1299