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/cgroup.h" 47 #include "util/util.h" 48 #include "util/parse-options.h" 49 #include "util/parse-events.h" 50 #include "util/pmu.h" 51 #include "util/event.h" 52 #include "util/evlist.h" 53 #include "util/evsel.h" 54 #include "util/debug.h" 55 #include "util/color.h" 56 #include "util/stat.h" 57 #include "util/header.h" 58 #include "util/cpumap.h" 59 #include "util/thread.h" 60 #include "util/thread_map.h" 61 62 #include <stdlib.h> 63 #include <sys/prctl.h> 64 #include <locale.h> 65 66 #define DEFAULT_SEPARATOR " " 67 #define CNTR_NOT_SUPPORTED "<not supported>" 68 #define CNTR_NOT_COUNTED "<not counted>" 69 70 static void print_stat(int argc, const char **argv); 71 static void print_counter_aggr(struct perf_evsel *counter, char *prefix); 72 static void print_counter(struct perf_evsel *counter, char *prefix); 73 static void print_aggr(char *prefix); 74 75 /* Default events used for perf stat -T */ 76 static const char *transaction_attrs = { 77 "task-clock," 78 "{" 79 "instructions," 80 "cycles," 81 "cpu/cycles-t/," 82 "cpu/tx-start/," 83 "cpu/el-start/," 84 "cpu/cycles-ct/" 85 "}" 86 }; 87 88 /* More limited version when the CPU does not have all events. */ 89 static const char * transaction_limited_attrs = { 90 "task-clock," 91 "{" 92 "instructions," 93 "cycles," 94 "cpu/cycles-t/," 95 "cpu/tx-start/" 96 "}" 97 }; 98 99 static struct perf_evlist *evsel_list; 100 101 static struct target target = { 102 .uid = UINT_MAX, 103 }; 104 105 static int run_count = 1; 106 static bool no_inherit = false; 107 static bool scale = true; 108 static enum aggr_mode aggr_mode = AGGR_GLOBAL; 109 static volatile pid_t child_pid = -1; 110 static bool null_run = false; 111 static int detailed_run = 0; 112 static bool transaction_run; 113 static bool big_num = true; 114 static int big_num_opt = -1; 115 static const char *csv_sep = NULL; 116 static bool csv_output = false; 117 static bool group = false; 118 static FILE *output = NULL; 119 static const char *pre_cmd = NULL; 120 static const char *post_cmd = NULL; 121 static bool sync_run = false; 122 static unsigned int interval = 0; 123 static unsigned int initial_delay = 0; 124 static unsigned int unit_width = 4; /* strlen("unit") */ 125 static bool forever = false; 126 static struct timespec ref_time; 127 static struct cpu_map *aggr_map; 128 static int (*aggr_get_id)(struct cpu_map *m, int cpu); 129 130 static volatile int done = 0; 131 132 static inline void diff_timespec(struct timespec *r, struct timespec *a, 133 struct timespec *b) 134 { 135 r->tv_sec = a->tv_sec - b->tv_sec; 136 if (a->tv_nsec < b->tv_nsec) { 137 r->tv_nsec = a->tv_nsec + 1000000000L - b->tv_nsec; 138 r->tv_sec--; 139 } else { 140 r->tv_nsec = a->tv_nsec - b->tv_nsec ; 141 } 142 } 143 144 static inline struct cpu_map *perf_evsel__cpus(struct perf_evsel *evsel) 145 { 146 return (evsel->cpus && !target.cpu_list) ? evsel->cpus : evsel_list->cpus; 147 } 148 149 static inline int perf_evsel__nr_cpus(struct perf_evsel *evsel) 150 { 151 return perf_evsel__cpus(evsel)->nr; 152 } 153 154 static void perf_evsel__reset_stat_priv(struct perf_evsel *evsel) 155 { 156 int i; 157 struct perf_stat *ps = evsel->priv; 158 159 for (i = 0; i < 3; i++) 160 init_stats(&ps->res_stats[i]); 161 162 perf_stat_evsel_id_init(evsel); 163 } 164 165 static int perf_evsel__alloc_stat_priv(struct perf_evsel *evsel) 166 { 167 evsel->priv = zalloc(sizeof(struct perf_stat)); 168 if (evsel->priv == NULL) 169 return -ENOMEM; 170 perf_evsel__reset_stat_priv(evsel); 171 return 0; 172 } 173 174 static void perf_evsel__free_stat_priv(struct perf_evsel *evsel) 175 { 176 zfree(&evsel->priv); 177 } 178 179 static int perf_evsel__alloc_prev_raw_counts(struct perf_evsel *evsel) 180 { 181 struct perf_counts *counts; 182 183 counts = perf_counts__new(perf_evsel__nr_cpus(evsel)); 184 if (counts) 185 evsel->prev_raw_counts = counts; 186 187 return counts ? 0 : -ENOMEM; 188 } 189 190 static void perf_evsel__free_prev_raw_counts(struct perf_evsel *evsel) 191 { 192 perf_counts__delete(evsel->prev_raw_counts); 193 evsel->prev_raw_counts = NULL; 194 } 195 196 static void perf_evlist__free_stats(struct perf_evlist *evlist) 197 { 198 struct perf_evsel *evsel; 199 200 evlist__for_each(evlist, evsel) { 201 perf_evsel__free_stat_priv(evsel); 202 perf_evsel__free_counts(evsel); 203 perf_evsel__free_prev_raw_counts(evsel); 204 } 205 } 206 207 static int perf_evlist__alloc_stats(struct perf_evlist *evlist, bool alloc_raw) 208 { 209 struct perf_evsel *evsel; 210 211 evlist__for_each(evlist, evsel) { 212 if (perf_evsel__alloc_stat_priv(evsel) < 0 || 213 perf_evsel__alloc_counts(evsel, perf_evsel__nr_cpus(evsel)) < 0 || 214 (alloc_raw && perf_evsel__alloc_prev_raw_counts(evsel) < 0)) 215 goto out_free; 216 } 217 218 return 0; 219 220 out_free: 221 perf_evlist__free_stats(evlist); 222 return -1; 223 } 224 225 static void perf_stat__reset_stats(struct perf_evlist *evlist) 226 { 227 struct perf_evsel *evsel; 228 229 evlist__for_each(evlist, evsel) { 230 perf_evsel__reset_stat_priv(evsel); 231 perf_evsel__reset_counts(evsel, perf_evsel__nr_cpus(evsel)); 232 } 233 234 perf_stat__reset_shadow_stats(); 235 } 236 237 static int create_perf_stat_counter(struct perf_evsel *evsel) 238 { 239 struct perf_event_attr *attr = &evsel->attr; 240 241 if (scale) 242 attr->read_format = PERF_FORMAT_TOTAL_TIME_ENABLED | 243 PERF_FORMAT_TOTAL_TIME_RUNNING; 244 245 attr->inherit = !no_inherit; 246 247 if (target__has_cpu(&target)) 248 return perf_evsel__open_per_cpu(evsel, perf_evsel__cpus(evsel)); 249 250 if (!target__has_task(&target) && perf_evsel__is_group_leader(evsel)) { 251 attr->disabled = 1; 252 if (!initial_delay) 253 attr->enable_on_exec = 1; 254 } 255 256 return perf_evsel__open_per_thread(evsel, evsel_list->threads); 257 } 258 259 /* 260 * Does the counter have nsecs as a unit? 261 */ 262 static inline int nsec_counter(struct perf_evsel *evsel) 263 { 264 if (perf_evsel__match(evsel, SOFTWARE, SW_CPU_CLOCK) || 265 perf_evsel__match(evsel, SOFTWARE, SW_TASK_CLOCK)) 266 return 1; 267 268 return 0; 269 } 270 271 static void zero_per_pkg(struct perf_evsel *counter) 272 { 273 if (counter->per_pkg_mask) 274 memset(counter->per_pkg_mask, 0, MAX_NR_CPUS); 275 } 276 277 static int check_per_pkg(struct perf_evsel *counter, int cpu, bool *skip) 278 { 279 unsigned long *mask = counter->per_pkg_mask; 280 struct cpu_map *cpus = perf_evsel__cpus(counter); 281 int s; 282 283 *skip = false; 284 285 if (!counter->per_pkg) 286 return 0; 287 288 if (cpu_map__empty(cpus)) 289 return 0; 290 291 if (!mask) { 292 mask = zalloc(MAX_NR_CPUS); 293 if (!mask) 294 return -ENOMEM; 295 296 counter->per_pkg_mask = mask; 297 } 298 299 s = cpu_map__get_socket(cpus, cpu); 300 if (s < 0) 301 return -1; 302 303 *skip = test_and_set_bit(s, mask) == 1; 304 return 0; 305 } 306 307 static int read_cb(struct perf_evsel *evsel, int cpu, int thread __maybe_unused, 308 struct perf_counts_values *count) 309 { 310 struct perf_counts_values *aggr = &evsel->counts->aggr; 311 static struct perf_counts_values zero; 312 bool skip = false; 313 314 if (check_per_pkg(evsel, cpu, &skip)) { 315 pr_err("failed to read per-pkg counter\n"); 316 return -1; 317 } 318 319 if (skip) 320 count = &zero; 321 322 switch (aggr_mode) { 323 case AGGR_CORE: 324 case AGGR_SOCKET: 325 case AGGR_NONE: 326 if (!evsel->snapshot) 327 perf_evsel__compute_deltas(evsel, cpu, count); 328 perf_counts_values__scale(count, scale, NULL); 329 evsel->counts->cpu[cpu] = *count; 330 if (aggr_mode == AGGR_NONE) 331 perf_stat__update_shadow_stats(evsel, count->values, cpu); 332 break; 333 case AGGR_GLOBAL: 334 aggr->val += count->val; 335 if (scale) { 336 aggr->ena += count->ena; 337 aggr->run += count->run; 338 } 339 default: 340 break; 341 } 342 343 return 0; 344 } 345 346 static int read_counter(struct perf_evsel *counter); 347 348 /* 349 * Read out the results of a single counter: 350 * aggregate counts across CPUs in system-wide mode 351 */ 352 static int read_counter_aggr(struct perf_evsel *counter) 353 { 354 struct perf_counts_values *aggr = &counter->counts->aggr; 355 struct perf_stat *ps = counter->priv; 356 u64 *count = counter->counts->aggr.values; 357 int i; 358 359 aggr->val = aggr->ena = aggr->run = 0; 360 361 if (read_counter(counter)) 362 return -1; 363 364 if (!counter->snapshot) 365 perf_evsel__compute_deltas(counter, -1, aggr); 366 perf_counts_values__scale(aggr, scale, &counter->counts->scaled); 367 368 for (i = 0; i < 3; i++) 369 update_stats(&ps->res_stats[i], count[i]); 370 371 if (verbose) { 372 fprintf(output, "%s: %" PRIu64 " %" PRIu64 " %" PRIu64 "\n", 373 perf_evsel__name(counter), count[0], count[1], count[2]); 374 } 375 376 /* 377 * Save the full runtime - to allow normalization during printout: 378 */ 379 perf_stat__update_shadow_stats(counter, count, 0); 380 381 return 0; 382 } 383 384 /* 385 * Read out the results of a single counter: 386 * do not aggregate counts across CPUs in system-wide mode 387 */ 388 static int read_counter(struct perf_evsel *counter) 389 { 390 int nthreads = thread_map__nr(evsel_list->threads); 391 int ncpus = perf_evsel__nr_cpus(counter); 392 int cpu, thread; 393 394 if (!counter->supported) 395 return -ENOENT; 396 397 if (counter->system_wide) 398 nthreads = 1; 399 400 if (counter->per_pkg) 401 zero_per_pkg(counter); 402 403 for (thread = 0; thread < nthreads; thread++) { 404 for (cpu = 0; cpu < ncpus; cpu++) { 405 if (perf_evsel__read_cb(counter, cpu, thread, read_cb)) 406 return -1; 407 } 408 } 409 410 return 0; 411 } 412 413 static void print_interval(void) 414 { 415 static int num_print_interval; 416 struct perf_evsel *counter; 417 struct perf_stat *ps; 418 struct timespec ts, rs; 419 char prefix[64]; 420 421 if (aggr_mode == AGGR_GLOBAL) { 422 evlist__for_each(evsel_list, counter) { 423 ps = counter->priv; 424 memset(ps->res_stats, 0, sizeof(ps->res_stats)); 425 read_counter_aggr(counter); 426 } 427 } else { 428 evlist__for_each(evsel_list, counter) { 429 ps = counter->priv; 430 memset(ps->res_stats, 0, sizeof(ps->res_stats)); 431 read_counter(counter); 432 } 433 } 434 435 clock_gettime(CLOCK_MONOTONIC, &ts); 436 diff_timespec(&rs, &ts, &ref_time); 437 sprintf(prefix, "%6lu.%09lu%s", rs.tv_sec, rs.tv_nsec, csv_sep); 438 439 if (num_print_interval == 0 && !csv_output) { 440 switch (aggr_mode) { 441 case AGGR_SOCKET: 442 fprintf(output, "# time socket cpus counts %*s events\n", unit_width, "unit"); 443 break; 444 case AGGR_CORE: 445 fprintf(output, "# time core cpus counts %*s events\n", unit_width, "unit"); 446 break; 447 case AGGR_NONE: 448 fprintf(output, "# time CPU counts %*s events\n", unit_width, "unit"); 449 break; 450 case AGGR_GLOBAL: 451 default: 452 fprintf(output, "# time counts %*s events\n", unit_width, "unit"); 453 } 454 } 455 456 if (++num_print_interval == 25) 457 num_print_interval = 0; 458 459 switch (aggr_mode) { 460 case AGGR_CORE: 461 case AGGR_SOCKET: 462 print_aggr(prefix); 463 break; 464 case AGGR_NONE: 465 evlist__for_each(evsel_list, counter) 466 print_counter(counter, prefix); 467 break; 468 case AGGR_GLOBAL: 469 default: 470 evlist__for_each(evsel_list, counter) 471 print_counter_aggr(counter, prefix); 472 } 473 474 fflush(output); 475 } 476 477 static void handle_initial_delay(void) 478 { 479 struct perf_evsel *counter; 480 481 if (initial_delay) { 482 const int ncpus = cpu_map__nr(evsel_list->cpus), 483 nthreads = thread_map__nr(evsel_list->threads); 484 485 usleep(initial_delay * 1000); 486 evlist__for_each(evsel_list, counter) 487 perf_evsel__enable(counter, ncpus, nthreads); 488 } 489 } 490 491 static volatile int workload_exec_errno; 492 493 /* 494 * perf_evlist__prepare_workload will send a SIGUSR1 495 * if the fork fails, since we asked by setting its 496 * want_signal to true. 497 */ 498 static void workload_exec_failed_signal(int signo __maybe_unused, siginfo_t *info, 499 void *ucontext __maybe_unused) 500 { 501 workload_exec_errno = info->si_value.sival_int; 502 } 503 504 static int __run_perf_stat(int argc, const char **argv) 505 { 506 char msg[512]; 507 unsigned long long t0, t1; 508 struct perf_evsel *counter; 509 struct timespec ts; 510 size_t l; 511 int status = 0; 512 const bool forks = (argc > 0); 513 514 if (interval) { 515 ts.tv_sec = interval / 1000; 516 ts.tv_nsec = (interval % 1000) * 1000000; 517 } else { 518 ts.tv_sec = 1; 519 ts.tv_nsec = 0; 520 } 521 522 if (forks) { 523 if (perf_evlist__prepare_workload(evsel_list, &target, argv, false, 524 workload_exec_failed_signal) < 0) { 525 perror("failed to prepare workload"); 526 return -1; 527 } 528 child_pid = evsel_list->workload.pid; 529 } 530 531 if (group) 532 perf_evlist__set_leader(evsel_list); 533 534 evlist__for_each(evsel_list, counter) { 535 if (create_perf_stat_counter(counter) < 0) { 536 /* 537 * PPC returns ENXIO for HW counters until 2.6.37 538 * (behavior changed with commit b0a873e). 539 */ 540 if (errno == EINVAL || errno == ENOSYS || 541 errno == ENOENT || errno == EOPNOTSUPP || 542 errno == ENXIO) { 543 if (verbose) 544 ui__warning("%s event is not supported by the kernel.\n", 545 perf_evsel__name(counter)); 546 counter->supported = false; 547 548 if ((counter->leader != counter) || 549 !(counter->leader->nr_members > 1)) 550 continue; 551 } 552 553 perf_evsel__open_strerror(counter, &target, 554 errno, msg, sizeof(msg)); 555 ui__error("%s\n", msg); 556 557 if (child_pid != -1) 558 kill(child_pid, SIGTERM); 559 560 return -1; 561 } 562 counter->supported = true; 563 564 l = strlen(counter->unit); 565 if (l > unit_width) 566 unit_width = l; 567 } 568 569 if (perf_evlist__apply_filters(evsel_list, &counter)) { 570 error("failed to set filter \"%s\" on event %s with %d (%s)\n", 571 counter->filter, perf_evsel__name(counter), errno, 572 strerror_r(errno, msg, sizeof(msg))); 573 return -1; 574 } 575 576 /* 577 * Enable counters and exec the command: 578 */ 579 t0 = rdclock(); 580 clock_gettime(CLOCK_MONOTONIC, &ref_time); 581 582 if (forks) { 583 perf_evlist__start_workload(evsel_list); 584 handle_initial_delay(); 585 586 if (interval) { 587 while (!waitpid(child_pid, &status, WNOHANG)) { 588 nanosleep(&ts, NULL); 589 print_interval(); 590 } 591 } 592 wait(&status); 593 594 if (workload_exec_errno) { 595 const char *emsg = strerror_r(workload_exec_errno, msg, sizeof(msg)); 596 pr_err("Workload failed: %s\n", emsg); 597 return -1; 598 } 599 600 if (WIFSIGNALED(status)) 601 psignal(WTERMSIG(status), argv[0]); 602 } else { 603 handle_initial_delay(); 604 while (!done) { 605 nanosleep(&ts, NULL); 606 if (interval) 607 print_interval(); 608 } 609 } 610 611 t1 = rdclock(); 612 613 update_stats(&walltime_nsecs_stats, t1 - t0); 614 615 if (aggr_mode == AGGR_GLOBAL) { 616 evlist__for_each(evsel_list, counter) { 617 read_counter_aggr(counter); 618 perf_evsel__close_fd(counter, perf_evsel__nr_cpus(counter), 619 thread_map__nr(evsel_list->threads)); 620 } 621 } else { 622 evlist__for_each(evsel_list, counter) { 623 read_counter(counter); 624 perf_evsel__close_fd(counter, perf_evsel__nr_cpus(counter), 1); 625 } 626 } 627 628 return WEXITSTATUS(status); 629 } 630 631 static int run_perf_stat(int argc, const char **argv) 632 { 633 int ret; 634 635 if (pre_cmd) { 636 ret = system(pre_cmd); 637 if (ret) 638 return ret; 639 } 640 641 if (sync_run) 642 sync(); 643 644 ret = __run_perf_stat(argc, argv); 645 if (ret) 646 return ret; 647 648 if (post_cmd) { 649 ret = system(post_cmd); 650 if (ret) 651 return ret; 652 } 653 654 return ret; 655 } 656 657 static void print_running(u64 run, u64 ena) 658 { 659 if (csv_output) { 660 fprintf(output, "%s%" PRIu64 "%s%.2f", 661 csv_sep, 662 run, 663 csv_sep, 664 ena ? 100.0 * run / ena : 100.0); 665 } else if (run != ena) { 666 fprintf(output, " (%.2f%%)", 100.0 * run / ena); 667 } 668 } 669 670 static void print_noise_pct(double total, double avg) 671 { 672 double pct = rel_stddev_stats(total, avg); 673 674 if (csv_output) 675 fprintf(output, "%s%.2f%%", csv_sep, pct); 676 else if (pct) 677 fprintf(output, " ( +-%6.2f%% )", pct); 678 } 679 680 static void print_noise(struct perf_evsel *evsel, double avg) 681 { 682 struct perf_stat *ps; 683 684 if (run_count == 1) 685 return; 686 687 ps = evsel->priv; 688 print_noise_pct(stddev_stats(&ps->res_stats[0]), avg); 689 } 690 691 static void aggr_printout(struct perf_evsel *evsel, int id, int nr) 692 { 693 switch (aggr_mode) { 694 case AGGR_CORE: 695 fprintf(output, "S%d-C%*d%s%*d%s", 696 cpu_map__id_to_socket(id), 697 csv_output ? 0 : -8, 698 cpu_map__id_to_cpu(id), 699 csv_sep, 700 csv_output ? 0 : 4, 701 nr, 702 csv_sep); 703 break; 704 case AGGR_SOCKET: 705 fprintf(output, "S%*d%s%*d%s", 706 csv_output ? 0 : -5, 707 id, 708 csv_sep, 709 csv_output ? 0 : 4, 710 nr, 711 csv_sep); 712 break; 713 case AGGR_NONE: 714 fprintf(output, "CPU%*d%s", 715 csv_output ? 0 : -4, 716 perf_evsel__cpus(evsel)->map[id], csv_sep); 717 break; 718 case AGGR_GLOBAL: 719 default: 720 break; 721 } 722 } 723 724 static void nsec_printout(int id, int nr, struct perf_evsel *evsel, double avg) 725 { 726 double msecs = avg / 1e6; 727 const char *fmt_v, *fmt_n; 728 char name[25]; 729 730 fmt_v = csv_output ? "%.6f%s" : "%18.6f%s"; 731 fmt_n = csv_output ? "%s" : "%-25s"; 732 733 aggr_printout(evsel, id, nr); 734 735 scnprintf(name, sizeof(name), "%s%s", 736 perf_evsel__name(evsel), csv_output ? "" : " (msec)"); 737 738 fprintf(output, fmt_v, msecs, csv_sep); 739 740 if (csv_output) 741 fprintf(output, "%s%s", evsel->unit, csv_sep); 742 else 743 fprintf(output, "%-*s%s", unit_width, evsel->unit, csv_sep); 744 745 fprintf(output, fmt_n, name); 746 747 if (evsel->cgrp) 748 fprintf(output, "%s%s", csv_sep, evsel->cgrp->name); 749 750 if (csv_output || interval) 751 return; 752 753 if (perf_evsel__match(evsel, SOFTWARE, SW_TASK_CLOCK)) 754 fprintf(output, " # %8.3f CPUs utilized ", 755 avg / avg_stats(&walltime_nsecs_stats)); 756 else 757 fprintf(output, " "); 758 } 759 760 static void abs_printout(int id, int nr, struct perf_evsel *evsel, double avg) 761 { 762 double sc = evsel->scale; 763 const char *fmt; 764 int cpu = cpu_map__id_to_cpu(id); 765 766 if (csv_output) { 767 fmt = sc != 1.0 ? "%.2f%s" : "%.0f%s"; 768 } else { 769 if (big_num) 770 fmt = sc != 1.0 ? "%'18.2f%s" : "%'18.0f%s"; 771 else 772 fmt = sc != 1.0 ? "%18.2f%s" : "%18.0f%s"; 773 } 774 775 aggr_printout(evsel, id, nr); 776 777 if (aggr_mode == AGGR_GLOBAL) 778 cpu = 0; 779 780 fprintf(output, fmt, avg, csv_sep); 781 782 if (evsel->unit) 783 fprintf(output, "%-*s%s", 784 csv_output ? 0 : unit_width, 785 evsel->unit, csv_sep); 786 787 fprintf(output, "%-*s", csv_output ? 0 : 25, perf_evsel__name(evsel)); 788 789 if (evsel->cgrp) 790 fprintf(output, "%s%s", csv_sep, evsel->cgrp->name); 791 792 if (csv_output || interval) 793 return; 794 795 perf_stat__print_shadow_stats(output, evsel, avg, cpu, aggr_mode); 796 } 797 798 static void print_aggr(char *prefix) 799 { 800 struct perf_evsel *counter; 801 int cpu, cpu2, s, s2, id, nr; 802 double uval; 803 u64 ena, run, val; 804 805 if (!(aggr_map || aggr_get_id)) 806 return; 807 808 for (s = 0; s < aggr_map->nr; s++) { 809 id = aggr_map->map[s]; 810 evlist__for_each(evsel_list, counter) { 811 val = ena = run = 0; 812 nr = 0; 813 for (cpu = 0; cpu < perf_evsel__nr_cpus(counter); cpu++) { 814 cpu2 = perf_evsel__cpus(counter)->map[cpu]; 815 s2 = aggr_get_id(evsel_list->cpus, cpu2); 816 if (s2 != id) 817 continue; 818 val += counter->counts->cpu[cpu].val; 819 ena += counter->counts->cpu[cpu].ena; 820 run += counter->counts->cpu[cpu].run; 821 nr++; 822 } 823 if (prefix) 824 fprintf(output, "%s", prefix); 825 826 if (run == 0 || ena == 0) { 827 aggr_printout(counter, id, nr); 828 829 fprintf(output, "%*s%s", 830 csv_output ? 0 : 18, 831 counter->supported ? CNTR_NOT_COUNTED : CNTR_NOT_SUPPORTED, 832 csv_sep); 833 834 fprintf(output, "%-*s%s", 835 csv_output ? 0 : unit_width, 836 counter->unit, csv_sep); 837 838 fprintf(output, "%*s", 839 csv_output ? 0 : -25, 840 perf_evsel__name(counter)); 841 842 if (counter->cgrp) 843 fprintf(output, "%s%s", 844 csv_sep, counter->cgrp->name); 845 846 print_running(run, ena); 847 fputc('\n', output); 848 continue; 849 } 850 uval = val * counter->scale; 851 852 if (nsec_counter(counter)) 853 nsec_printout(id, nr, counter, uval); 854 else 855 abs_printout(id, nr, counter, uval); 856 857 if (!csv_output) 858 print_noise(counter, 1.0); 859 860 print_running(run, ena); 861 fputc('\n', output); 862 } 863 } 864 } 865 866 /* 867 * Print out the results of a single counter: 868 * aggregated counts in system-wide mode 869 */ 870 static void print_counter_aggr(struct perf_evsel *counter, char *prefix) 871 { 872 struct perf_stat *ps = counter->priv; 873 double avg = avg_stats(&ps->res_stats[0]); 874 int scaled = counter->counts->scaled; 875 double uval; 876 double avg_enabled, avg_running; 877 878 avg_enabled = avg_stats(&ps->res_stats[1]); 879 avg_running = avg_stats(&ps->res_stats[2]); 880 881 if (prefix) 882 fprintf(output, "%s", prefix); 883 884 if (scaled == -1 || !counter->supported) { 885 fprintf(output, "%*s%s", 886 csv_output ? 0 : 18, 887 counter->supported ? CNTR_NOT_COUNTED : CNTR_NOT_SUPPORTED, 888 csv_sep); 889 fprintf(output, "%-*s%s", 890 csv_output ? 0 : unit_width, 891 counter->unit, csv_sep); 892 fprintf(output, "%*s", 893 csv_output ? 0 : -25, 894 perf_evsel__name(counter)); 895 896 if (counter->cgrp) 897 fprintf(output, "%s%s", csv_sep, counter->cgrp->name); 898 899 print_running(avg_running, avg_enabled); 900 fputc('\n', output); 901 return; 902 } 903 904 uval = avg * counter->scale; 905 906 if (nsec_counter(counter)) 907 nsec_printout(-1, 0, counter, uval); 908 else 909 abs_printout(-1, 0, counter, uval); 910 911 print_noise(counter, avg); 912 913 print_running(avg_running, avg_enabled); 914 fprintf(output, "\n"); 915 } 916 917 /* 918 * Print out the results of a single counter: 919 * does not use aggregated count in system-wide 920 */ 921 static void print_counter(struct perf_evsel *counter, char *prefix) 922 { 923 u64 ena, run, val; 924 double uval; 925 int cpu; 926 927 for (cpu = 0; cpu < perf_evsel__nr_cpus(counter); cpu++) { 928 val = counter->counts->cpu[cpu].val; 929 ena = counter->counts->cpu[cpu].ena; 930 run = counter->counts->cpu[cpu].run; 931 932 if (prefix) 933 fprintf(output, "%s", prefix); 934 935 if (run == 0 || ena == 0) { 936 fprintf(output, "CPU%*d%s%*s%s", 937 csv_output ? 0 : -4, 938 perf_evsel__cpus(counter)->map[cpu], csv_sep, 939 csv_output ? 0 : 18, 940 counter->supported ? CNTR_NOT_COUNTED : CNTR_NOT_SUPPORTED, 941 csv_sep); 942 943 fprintf(output, "%-*s%s", 944 csv_output ? 0 : unit_width, 945 counter->unit, csv_sep); 946 947 fprintf(output, "%*s", 948 csv_output ? 0 : -25, 949 perf_evsel__name(counter)); 950 951 if (counter->cgrp) 952 fprintf(output, "%s%s", 953 csv_sep, counter->cgrp->name); 954 955 print_running(run, ena); 956 fputc('\n', output); 957 continue; 958 } 959 960 uval = val * counter->scale; 961 962 if (nsec_counter(counter)) 963 nsec_printout(cpu, 0, counter, uval); 964 else 965 abs_printout(cpu, 0, counter, uval); 966 967 if (!csv_output) 968 print_noise(counter, 1.0); 969 print_running(run, ena); 970 971 fputc('\n', output); 972 } 973 } 974 975 static void print_stat(int argc, const char **argv) 976 { 977 struct perf_evsel *counter; 978 int i; 979 980 fflush(stdout); 981 982 if (!csv_output) { 983 fprintf(output, "\n"); 984 fprintf(output, " Performance counter stats for "); 985 if (target.system_wide) 986 fprintf(output, "\'system wide"); 987 else if (target.cpu_list) 988 fprintf(output, "\'CPU(s) %s", target.cpu_list); 989 else if (!target__has_task(&target)) { 990 fprintf(output, "\'%s", argv[0]); 991 for (i = 1; i < argc; i++) 992 fprintf(output, " %s", argv[i]); 993 } else if (target.pid) 994 fprintf(output, "process id \'%s", target.pid); 995 else 996 fprintf(output, "thread id \'%s", target.tid); 997 998 fprintf(output, "\'"); 999 if (run_count > 1) 1000 fprintf(output, " (%d runs)", run_count); 1001 fprintf(output, ":\n\n"); 1002 } 1003 1004 switch (aggr_mode) { 1005 case AGGR_CORE: 1006 case AGGR_SOCKET: 1007 print_aggr(NULL); 1008 break; 1009 case AGGR_GLOBAL: 1010 evlist__for_each(evsel_list, counter) 1011 print_counter_aggr(counter, NULL); 1012 break; 1013 case AGGR_NONE: 1014 evlist__for_each(evsel_list, counter) 1015 print_counter(counter, NULL); 1016 break; 1017 default: 1018 break; 1019 } 1020 1021 if (!csv_output) { 1022 if (!null_run) 1023 fprintf(output, "\n"); 1024 fprintf(output, " %17.9f seconds time elapsed", 1025 avg_stats(&walltime_nsecs_stats)/1e9); 1026 if (run_count > 1) { 1027 fprintf(output, " "); 1028 print_noise_pct(stddev_stats(&walltime_nsecs_stats), 1029 avg_stats(&walltime_nsecs_stats)); 1030 } 1031 fprintf(output, "\n\n"); 1032 } 1033 } 1034 1035 static volatile int signr = -1; 1036 1037 static void skip_signal(int signo) 1038 { 1039 if ((child_pid == -1) || interval) 1040 done = 1; 1041 1042 signr = signo; 1043 /* 1044 * render child_pid harmless 1045 * won't send SIGTERM to a random 1046 * process in case of race condition 1047 * and fast PID recycling 1048 */ 1049 child_pid = -1; 1050 } 1051 1052 static void sig_atexit(void) 1053 { 1054 sigset_t set, oset; 1055 1056 /* 1057 * avoid race condition with SIGCHLD handler 1058 * in skip_signal() which is modifying child_pid 1059 * goal is to avoid send SIGTERM to a random 1060 * process 1061 */ 1062 sigemptyset(&set); 1063 sigaddset(&set, SIGCHLD); 1064 sigprocmask(SIG_BLOCK, &set, &oset); 1065 1066 if (child_pid != -1) 1067 kill(child_pid, SIGTERM); 1068 1069 sigprocmask(SIG_SETMASK, &oset, NULL); 1070 1071 if (signr == -1) 1072 return; 1073 1074 signal(signr, SIG_DFL); 1075 kill(getpid(), signr); 1076 } 1077 1078 static int stat__set_big_num(const struct option *opt __maybe_unused, 1079 const char *s __maybe_unused, int unset) 1080 { 1081 big_num_opt = unset ? 0 : 1; 1082 return 0; 1083 } 1084 1085 static int perf_stat_init_aggr_mode(void) 1086 { 1087 switch (aggr_mode) { 1088 case AGGR_SOCKET: 1089 if (cpu_map__build_socket_map(evsel_list->cpus, &aggr_map)) { 1090 perror("cannot build socket map"); 1091 return -1; 1092 } 1093 aggr_get_id = cpu_map__get_socket; 1094 break; 1095 case AGGR_CORE: 1096 if (cpu_map__build_core_map(evsel_list->cpus, &aggr_map)) { 1097 perror("cannot build core map"); 1098 return -1; 1099 } 1100 aggr_get_id = cpu_map__get_core; 1101 break; 1102 case AGGR_NONE: 1103 case AGGR_GLOBAL: 1104 default: 1105 break; 1106 } 1107 return 0; 1108 } 1109 1110 /* 1111 * Add default attributes, if there were no attributes specified or 1112 * if -d/--detailed, -d -d or -d -d -d is used: 1113 */ 1114 static int add_default_attributes(void) 1115 { 1116 struct perf_event_attr default_attrs[] = { 1117 1118 { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_TASK_CLOCK }, 1119 { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_CONTEXT_SWITCHES }, 1120 { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_CPU_MIGRATIONS }, 1121 { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_PAGE_FAULTS }, 1122 1123 { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_CPU_CYCLES }, 1124 { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_STALLED_CYCLES_FRONTEND }, 1125 { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_STALLED_CYCLES_BACKEND }, 1126 { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_INSTRUCTIONS }, 1127 { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_BRANCH_INSTRUCTIONS }, 1128 { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_BRANCH_MISSES }, 1129 1130 }; 1131 1132 /* 1133 * Detailed stats (-d), covering the L1 and last level data caches: 1134 */ 1135 struct perf_event_attr detailed_attrs[] = { 1136 1137 { .type = PERF_TYPE_HW_CACHE, 1138 .config = 1139 PERF_COUNT_HW_CACHE_L1D << 0 | 1140 (PERF_COUNT_HW_CACHE_OP_READ << 8) | 1141 (PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16) }, 1142 1143 { .type = PERF_TYPE_HW_CACHE, 1144 .config = 1145 PERF_COUNT_HW_CACHE_L1D << 0 | 1146 (PERF_COUNT_HW_CACHE_OP_READ << 8) | 1147 (PERF_COUNT_HW_CACHE_RESULT_MISS << 16) }, 1148 1149 { .type = PERF_TYPE_HW_CACHE, 1150 .config = 1151 PERF_COUNT_HW_CACHE_LL << 0 | 1152 (PERF_COUNT_HW_CACHE_OP_READ << 8) | 1153 (PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16) }, 1154 1155 { .type = PERF_TYPE_HW_CACHE, 1156 .config = 1157 PERF_COUNT_HW_CACHE_LL << 0 | 1158 (PERF_COUNT_HW_CACHE_OP_READ << 8) | 1159 (PERF_COUNT_HW_CACHE_RESULT_MISS << 16) }, 1160 }; 1161 1162 /* 1163 * Very detailed stats (-d -d), covering the instruction cache and the TLB caches: 1164 */ 1165 struct perf_event_attr very_detailed_attrs[] = { 1166 1167 { .type = PERF_TYPE_HW_CACHE, 1168 .config = 1169 PERF_COUNT_HW_CACHE_L1I << 0 | 1170 (PERF_COUNT_HW_CACHE_OP_READ << 8) | 1171 (PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16) }, 1172 1173 { .type = PERF_TYPE_HW_CACHE, 1174 .config = 1175 PERF_COUNT_HW_CACHE_L1I << 0 | 1176 (PERF_COUNT_HW_CACHE_OP_READ << 8) | 1177 (PERF_COUNT_HW_CACHE_RESULT_MISS << 16) }, 1178 1179 { .type = PERF_TYPE_HW_CACHE, 1180 .config = 1181 PERF_COUNT_HW_CACHE_DTLB << 0 | 1182 (PERF_COUNT_HW_CACHE_OP_READ << 8) | 1183 (PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16) }, 1184 1185 { .type = PERF_TYPE_HW_CACHE, 1186 .config = 1187 PERF_COUNT_HW_CACHE_DTLB << 0 | 1188 (PERF_COUNT_HW_CACHE_OP_READ << 8) | 1189 (PERF_COUNT_HW_CACHE_RESULT_MISS << 16) }, 1190 1191 { .type = PERF_TYPE_HW_CACHE, 1192 .config = 1193 PERF_COUNT_HW_CACHE_ITLB << 0 | 1194 (PERF_COUNT_HW_CACHE_OP_READ << 8) | 1195 (PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16) }, 1196 1197 { .type = PERF_TYPE_HW_CACHE, 1198 .config = 1199 PERF_COUNT_HW_CACHE_ITLB << 0 | 1200 (PERF_COUNT_HW_CACHE_OP_READ << 8) | 1201 (PERF_COUNT_HW_CACHE_RESULT_MISS << 16) }, 1202 1203 }; 1204 1205 /* 1206 * Very, very detailed stats (-d -d -d), adding prefetch events: 1207 */ 1208 struct perf_event_attr very_very_detailed_attrs[] = { 1209 1210 { .type = PERF_TYPE_HW_CACHE, 1211 .config = 1212 PERF_COUNT_HW_CACHE_L1D << 0 | 1213 (PERF_COUNT_HW_CACHE_OP_PREFETCH << 8) | 1214 (PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16) }, 1215 1216 { .type = PERF_TYPE_HW_CACHE, 1217 .config = 1218 PERF_COUNT_HW_CACHE_L1D << 0 | 1219 (PERF_COUNT_HW_CACHE_OP_PREFETCH << 8) | 1220 (PERF_COUNT_HW_CACHE_RESULT_MISS << 16) }, 1221 }; 1222 1223 /* Set attrs if no event is selected and !null_run: */ 1224 if (null_run) 1225 return 0; 1226 1227 if (transaction_run) { 1228 int err; 1229 if (pmu_have_event("cpu", "cycles-ct") && 1230 pmu_have_event("cpu", "el-start")) 1231 err = parse_events(evsel_list, transaction_attrs, NULL); 1232 else 1233 err = parse_events(evsel_list, transaction_limited_attrs, NULL); 1234 if (err) { 1235 fprintf(stderr, "Cannot set up transaction events\n"); 1236 return -1; 1237 } 1238 return 0; 1239 } 1240 1241 if (!evsel_list->nr_entries) { 1242 if (perf_evlist__add_default_attrs(evsel_list, default_attrs) < 0) 1243 return -1; 1244 } 1245 1246 /* Detailed events get appended to the event list: */ 1247 1248 if (detailed_run < 1) 1249 return 0; 1250 1251 /* Append detailed run extra attributes: */ 1252 if (perf_evlist__add_default_attrs(evsel_list, detailed_attrs) < 0) 1253 return -1; 1254 1255 if (detailed_run < 2) 1256 return 0; 1257 1258 /* Append very detailed run extra attributes: */ 1259 if (perf_evlist__add_default_attrs(evsel_list, very_detailed_attrs) < 0) 1260 return -1; 1261 1262 if (detailed_run < 3) 1263 return 0; 1264 1265 /* Append very, very detailed run extra attributes: */ 1266 return perf_evlist__add_default_attrs(evsel_list, very_very_detailed_attrs); 1267 } 1268 1269 int cmd_stat(int argc, const char **argv, const char *prefix __maybe_unused) 1270 { 1271 bool append_file = false; 1272 int output_fd = 0; 1273 const char *output_name = NULL; 1274 const struct option options[] = { 1275 OPT_BOOLEAN('T', "transaction", &transaction_run, 1276 "hardware transaction statistics"), 1277 OPT_CALLBACK('e', "event", &evsel_list, "event", 1278 "event selector. use 'perf list' to list available events", 1279 parse_events_option), 1280 OPT_CALLBACK(0, "filter", &evsel_list, "filter", 1281 "event filter", parse_filter), 1282 OPT_BOOLEAN('i', "no-inherit", &no_inherit, 1283 "child tasks do not inherit counters"), 1284 OPT_STRING('p', "pid", &target.pid, "pid", 1285 "stat events on existing process id"), 1286 OPT_STRING('t', "tid", &target.tid, "tid", 1287 "stat events on existing thread id"), 1288 OPT_BOOLEAN('a', "all-cpus", &target.system_wide, 1289 "system-wide collection from all CPUs"), 1290 OPT_BOOLEAN('g', "group", &group, 1291 "put the counters into a counter group"), 1292 OPT_BOOLEAN('c', "scale", &scale, "scale/normalize counters"), 1293 OPT_INCR('v', "verbose", &verbose, 1294 "be more verbose (show counter open errors, etc)"), 1295 OPT_INTEGER('r', "repeat", &run_count, 1296 "repeat command and print average + stddev (max: 100, forever: 0)"), 1297 OPT_BOOLEAN('n', "null", &null_run, 1298 "null run - dont start any counters"), 1299 OPT_INCR('d', "detailed", &detailed_run, 1300 "detailed run - start a lot of events"), 1301 OPT_BOOLEAN('S', "sync", &sync_run, 1302 "call sync() before starting a run"), 1303 OPT_CALLBACK_NOOPT('B', "big-num", NULL, NULL, 1304 "print large numbers with thousands\' separators", 1305 stat__set_big_num), 1306 OPT_STRING('C', "cpu", &target.cpu_list, "cpu", 1307 "list of cpus to monitor in system-wide"), 1308 OPT_SET_UINT('A', "no-aggr", &aggr_mode, 1309 "disable CPU count aggregation", AGGR_NONE), 1310 OPT_STRING('x', "field-separator", &csv_sep, "separator", 1311 "print counts with custom separator"), 1312 OPT_CALLBACK('G', "cgroup", &evsel_list, "name", 1313 "monitor event in cgroup name only", parse_cgroups), 1314 OPT_STRING('o', "output", &output_name, "file", "output file name"), 1315 OPT_BOOLEAN(0, "append", &append_file, "append to the output file"), 1316 OPT_INTEGER(0, "log-fd", &output_fd, 1317 "log output to fd, instead of stderr"), 1318 OPT_STRING(0, "pre", &pre_cmd, "command", 1319 "command to run prior to the measured command"), 1320 OPT_STRING(0, "post", &post_cmd, "command", 1321 "command to run after to the measured command"), 1322 OPT_UINTEGER('I', "interval-print", &interval, 1323 "print counts at regular interval in ms (>= 100)"), 1324 OPT_SET_UINT(0, "per-socket", &aggr_mode, 1325 "aggregate counts per processor socket", AGGR_SOCKET), 1326 OPT_SET_UINT(0, "per-core", &aggr_mode, 1327 "aggregate counts per physical processor core", AGGR_CORE), 1328 OPT_UINTEGER('D', "delay", &initial_delay, 1329 "ms to wait before starting measurement after program start"), 1330 OPT_END() 1331 }; 1332 const char * const stat_usage[] = { 1333 "perf stat [<options>] [<command>]", 1334 NULL 1335 }; 1336 int status = -EINVAL, run_idx; 1337 const char *mode; 1338 1339 setlocale(LC_ALL, ""); 1340 1341 evsel_list = perf_evlist__new(); 1342 if (evsel_list == NULL) 1343 return -ENOMEM; 1344 1345 argc = parse_options(argc, argv, options, stat_usage, 1346 PARSE_OPT_STOP_AT_NON_OPTION); 1347 1348 output = stderr; 1349 if (output_name && strcmp(output_name, "-")) 1350 output = NULL; 1351 1352 if (output_name && output_fd) { 1353 fprintf(stderr, "cannot use both --output and --log-fd\n"); 1354 parse_options_usage(stat_usage, options, "o", 1); 1355 parse_options_usage(NULL, options, "log-fd", 0); 1356 goto out; 1357 } 1358 1359 if (output_fd < 0) { 1360 fprintf(stderr, "argument to --log-fd must be a > 0\n"); 1361 parse_options_usage(stat_usage, options, "log-fd", 0); 1362 goto out; 1363 } 1364 1365 if (!output) { 1366 struct timespec tm; 1367 mode = append_file ? "a" : "w"; 1368 1369 output = fopen(output_name, mode); 1370 if (!output) { 1371 perror("failed to create output file"); 1372 return -1; 1373 } 1374 clock_gettime(CLOCK_REALTIME, &tm); 1375 fprintf(output, "# started on %s\n", ctime(&tm.tv_sec)); 1376 } else if (output_fd > 0) { 1377 mode = append_file ? "a" : "w"; 1378 output = fdopen(output_fd, mode); 1379 if (!output) { 1380 perror("Failed opening logfd"); 1381 return -errno; 1382 } 1383 } 1384 1385 if (csv_sep) { 1386 csv_output = true; 1387 if (!strcmp(csv_sep, "\\t")) 1388 csv_sep = "\t"; 1389 } else 1390 csv_sep = DEFAULT_SEPARATOR; 1391 1392 /* 1393 * let the spreadsheet do the pretty-printing 1394 */ 1395 if (csv_output) { 1396 /* User explicitly passed -B? */ 1397 if (big_num_opt == 1) { 1398 fprintf(stderr, "-B option not supported with -x\n"); 1399 parse_options_usage(stat_usage, options, "B", 1); 1400 parse_options_usage(NULL, options, "x", 1); 1401 goto out; 1402 } else /* Nope, so disable big number formatting */ 1403 big_num = false; 1404 } else if (big_num_opt == 0) /* User passed --no-big-num */ 1405 big_num = false; 1406 1407 if (!argc && target__none(&target)) 1408 usage_with_options(stat_usage, options); 1409 1410 if (run_count < 0) { 1411 pr_err("Run count must be a positive number\n"); 1412 parse_options_usage(stat_usage, options, "r", 1); 1413 goto out; 1414 } else if (run_count == 0) { 1415 forever = true; 1416 run_count = 1; 1417 } 1418 1419 /* no_aggr, cgroup are for system-wide only */ 1420 if ((aggr_mode != AGGR_GLOBAL || nr_cgroups) && 1421 !target__has_cpu(&target)) { 1422 fprintf(stderr, "both cgroup and no-aggregation " 1423 "modes only available in system-wide mode\n"); 1424 1425 parse_options_usage(stat_usage, options, "G", 1); 1426 parse_options_usage(NULL, options, "A", 1); 1427 parse_options_usage(NULL, options, "a", 1); 1428 goto out; 1429 } 1430 1431 if (add_default_attributes()) 1432 goto out; 1433 1434 target__validate(&target); 1435 1436 if (perf_evlist__create_maps(evsel_list, &target) < 0) { 1437 if (target__has_task(&target)) { 1438 pr_err("Problems finding threads of monitor\n"); 1439 parse_options_usage(stat_usage, options, "p", 1); 1440 parse_options_usage(NULL, options, "t", 1); 1441 } else if (target__has_cpu(&target)) { 1442 perror("failed to parse CPUs map"); 1443 parse_options_usage(stat_usage, options, "C", 1); 1444 parse_options_usage(NULL, options, "a", 1); 1445 } 1446 goto out; 1447 } 1448 if (interval && interval < 100) { 1449 pr_err("print interval must be >= 100ms\n"); 1450 parse_options_usage(stat_usage, options, "I", 1); 1451 goto out; 1452 } 1453 1454 if (perf_evlist__alloc_stats(evsel_list, interval)) 1455 goto out; 1456 1457 if (perf_stat_init_aggr_mode()) 1458 goto out; 1459 1460 /* 1461 * We dont want to block the signals - that would cause 1462 * child tasks to inherit that and Ctrl-C would not work. 1463 * What we want is for Ctrl-C to work in the exec()-ed 1464 * task, but being ignored by perf stat itself: 1465 */ 1466 atexit(sig_atexit); 1467 if (!forever) 1468 signal(SIGINT, skip_signal); 1469 signal(SIGCHLD, skip_signal); 1470 signal(SIGALRM, skip_signal); 1471 signal(SIGABRT, skip_signal); 1472 1473 status = 0; 1474 for (run_idx = 0; forever || run_idx < run_count; run_idx++) { 1475 if (run_count != 1 && verbose) 1476 fprintf(output, "[ perf stat: executing run #%d ... ]\n", 1477 run_idx + 1); 1478 1479 status = run_perf_stat(argc, argv); 1480 if (forever && status != -1) { 1481 print_stat(argc, argv); 1482 perf_stat__reset_stats(evsel_list); 1483 } 1484 } 1485 1486 if (!forever && status != -1 && !interval) 1487 print_stat(argc, argv); 1488 1489 perf_evlist__free_stats(evsel_list); 1490 out: 1491 perf_evlist__delete(evsel_list); 1492 return status; 1493 } 1494