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 Time: 0.104 11 12 Performance counter stats for '/home/mingo/hackbench': 13 14 1255.538611 task clock ticks # 10.143 CPU utilization factor 15 54011 context switches # 0.043 M/sec 16 385 CPU migrations # 0.000 M/sec 17 17755 pagefaults # 0.014 M/sec 18 3808323185 CPU cycles # 3033.219 M/sec 19 1575111190 instructions # 1254.530 M/sec 20 17367895 cache references # 13.833 M/sec 21 7674421 cache misses # 6.112 M/sec 22 23 Wall-clock time elapsed: 123.786620 msecs 24 25 * 26 * Copyright (C) 2008, Red Hat Inc, Ingo Molnar <mingo@redhat.com> 27 * 28 * Improvements and fixes by: 29 * 30 * Arjan van de Ven <arjan@linux.intel.com> 31 * Yanmin Zhang <yanmin.zhang@intel.com> 32 * Wu Fengguang <fengguang.wu@intel.com> 33 * Mike Galbraith <efault@gmx.de> 34 * Paul Mackerras <paulus@samba.org> 35 * Jaswinder Singh Rajput <jaswinder@kernel.org> 36 * 37 * Released under the GPL v2. (and only v2, not any later version) 38 */ 39 40 #include "perf.h" 41 #include "builtin.h" 42 #include "util/util.h" 43 #include "util/parse-options.h" 44 #include "util/parse-events.h" 45 #include "util/event.h" 46 #include "util/evlist.h" 47 #include "util/evsel.h" 48 #include "util/debug.h" 49 #include "util/header.h" 50 #include "util/cpumap.h" 51 #include "util/thread.h" 52 #include "util/thread_map.h" 53 54 #include <sys/prctl.h> 55 #include <math.h> 56 #include <locale.h> 57 58 #define DEFAULT_SEPARATOR " " 59 60 static struct perf_event_attr default_attrs[] = { 61 62 { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_TASK_CLOCK }, 63 { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_CONTEXT_SWITCHES }, 64 { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_CPU_MIGRATIONS }, 65 { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_PAGE_FAULTS }, 66 67 { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_CPU_CYCLES }, 68 { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_INSTRUCTIONS }, 69 { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_BRANCH_INSTRUCTIONS }, 70 { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_BRANCH_MISSES }, 71 { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_CACHE_REFERENCES }, 72 { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_CACHE_MISSES }, 73 74 }; 75 76 struct perf_evlist *evsel_list; 77 78 static bool system_wide = false; 79 static int run_idx = 0; 80 81 static int run_count = 1; 82 static bool no_inherit = false; 83 static bool scale = true; 84 static bool no_aggr = false; 85 static pid_t target_pid = -1; 86 static pid_t target_tid = -1; 87 static pid_t child_pid = -1; 88 static bool null_run = false; 89 static bool big_num = true; 90 static int big_num_opt = -1; 91 static const char *cpu_list; 92 static const char *csv_sep = NULL; 93 static bool csv_output = false; 94 95 static volatile int done = 0; 96 97 struct stats 98 { 99 double n, mean, M2; 100 }; 101 102 struct perf_stat { 103 struct stats res_stats[3]; 104 }; 105 106 static int perf_evsel__alloc_stat_priv(struct perf_evsel *evsel) 107 { 108 evsel->priv = zalloc(sizeof(struct perf_stat)); 109 return evsel->priv == NULL ? -ENOMEM : 0; 110 } 111 112 static void perf_evsel__free_stat_priv(struct perf_evsel *evsel) 113 { 114 free(evsel->priv); 115 evsel->priv = NULL; 116 } 117 118 static void update_stats(struct stats *stats, u64 val) 119 { 120 double delta; 121 122 stats->n++; 123 delta = val - stats->mean; 124 stats->mean += delta / stats->n; 125 stats->M2 += delta*(val - stats->mean); 126 } 127 128 static double avg_stats(struct stats *stats) 129 { 130 return stats->mean; 131 } 132 133 /* 134 * http://en.wikipedia.org/wiki/Algorithms_for_calculating_variance 135 * 136 * (\Sum n_i^2) - ((\Sum n_i)^2)/n 137 * s^2 = ------------------------------- 138 * n - 1 139 * 140 * http://en.wikipedia.org/wiki/Stddev 141 * 142 * The std dev of the mean is related to the std dev by: 143 * 144 * s 145 * s_mean = ------- 146 * sqrt(n) 147 * 148 */ 149 static double stddev_stats(struct stats *stats) 150 { 151 double variance = stats->M2 / (stats->n - 1); 152 double variance_mean = variance / stats->n; 153 154 return sqrt(variance_mean); 155 } 156 157 struct stats runtime_nsecs_stats[MAX_NR_CPUS]; 158 struct stats runtime_cycles_stats[MAX_NR_CPUS]; 159 struct stats runtime_branches_stats[MAX_NR_CPUS]; 160 struct stats walltime_nsecs_stats; 161 162 static int create_perf_stat_counter(struct perf_evsel *evsel) 163 { 164 struct perf_event_attr *attr = &evsel->attr; 165 166 if (scale) 167 attr->read_format = PERF_FORMAT_TOTAL_TIME_ENABLED | 168 PERF_FORMAT_TOTAL_TIME_RUNNING; 169 170 if (system_wide) 171 return perf_evsel__open_per_cpu(evsel, evsel_list->cpus, false, false); 172 173 attr->inherit = !no_inherit; 174 if (target_pid == -1 && target_tid == -1) { 175 attr->disabled = 1; 176 attr->enable_on_exec = 1; 177 } 178 179 return perf_evsel__open_per_thread(evsel, evsel_list->threads, false, false); 180 } 181 182 /* 183 * Does the counter have nsecs as a unit? 184 */ 185 static inline int nsec_counter(struct perf_evsel *evsel) 186 { 187 if (perf_evsel__match(evsel, SOFTWARE, SW_CPU_CLOCK) || 188 perf_evsel__match(evsel, SOFTWARE, SW_TASK_CLOCK)) 189 return 1; 190 191 return 0; 192 } 193 194 /* 195 * Read out the results of a single counter: 196 * aggregate counts across CPUs in system-wide mode 197 */ 198 static int read_counter_aggr(struct perf_evsel *counter) 199 { 200 struct perf_stat *ps = counter->priv; 201 u64 *count = counter->counts->aggr.values; 202 int i; 203 204 if (__perf_evsel__read(counter, evsel_list->cpus->nr, 205 evsel_list->threads->nr, scale) < 0) 206 return -1; 207 208 for (i = 0; i < 3; i++) 209 update_stats(&ps->res_stats[i], count[i]); 210 211 if (verbose) { 212 fprintf(stderr, "%s: %" PRIu64 " %" PRIu64 " %" PRIu64 "\n", 213 event_name(counter), count[0], count[1], count[2]); 214 } 215 216 /* 217 * Save the full runtime - to allow normalization during printout: 218 */ 219 if (perf_evsel__match(counter, SOFTWARE, SW_TASK_CLOCK)) 220 update_stats(&runtime_nsecs_stats[0], count[0]); 221 if (perf_evsel__match(counter, HARDWARE, HW_CPU_CYCLES)) 222 update_stats(&runtime_cycles_stats[0], count[0]); 223 if (perf_evsel__match(counter, HARDWARE, HW_BRANCH_INSTRUCTIONS)) 224 update_stats(&runtime_branches_stats[0], count[0]); 225 226 return 0; 227 } 228 229 /* 230 * Read out the results of a single counter: 231 * do not aggregate counts across CPUs in system-wide mode 232 */ 233 static int read_counter(struct perf_evsel *counter) 234 { 235 u64 *count; 236 int cpu; 237 238 for (cpu = 0; cpu < evsel_list->cpus->nr; cpu++) { 239 if (__perf_evsel__read_on_cpu(counter, cpu, 0, scale) < 0) 240 return -1; 241 242 count = counter->counts->cpu[cpu].values; 243 244 if (perf_evsel__match(counter, SOFTWARE, SW_TASK_CLOCK)) 245 update_stats(&runtime_nsecs_stats[cpu], count[0]); 246 if (perf_evsel__match(counter, HARDWARE, HW_CPU_CYCLES)) 247 update_stats(&runtime_cycles_stats[cpu], count[0]); 248 if (perf_evsel__match(counter, HARDWARE, HW_BRANCH_INSTRUCTIONS)) 249 update_stats(&runtime_branches_stats[cpu], count[0]); 250 } 251 252 return 0; 253 } 254 255 static int run_perf_stat(int argc __used, const char **argv) 256 { 257 unsigned long long t0, t1; 258 struct perf_evsel *counter; 259 int status = 0; 260 int child_ready_pipe[2], go_pipe[2]; 261 const bool forks = (argc > 0); 262 char buf; 263 264 if (forks && (pipe(child_ready_pipe) < 0 || pipe(go_pipe) < 0)) { 265 perror("failed to create pipes"); 266 exit(1); 267 } 268 269 if (forks) { 270 if ((child_pid = fork()) < 0) 271 perror("failed to fork"); 272 273 if (!child_pid) { 274 close(child_ready_pipe[0]); 275 close(go_pipe[1]); 276 fcntl(go_pipe[0], F_SETFD, FD_CLOEXEC); 277 278 /* 279 * Do a dummy execvp to get the PLT entry resolved, 280 * so we avoid the resolver overhead on the real 281 * execvp call. 282 */ 283 execvp("", (char **)argv); 284 285 /* 286 * Tell the parent we're ready to go 287 */ 288 close(child_ready_pipe[1]); 289 290 /* 291 * Wait until the parent tells us to go. 292 */ 293 if (read(go_pipe[0], &buf, 1) == -1) 294 perror("unable to read pipe"); 295 296 execvp(argv[0], (char **)argv); 297 298 perror(argv[0]); 299 exit(-1); 300 } 301 302 if (target_tid == -1 && target_pid == -1 && !system_wide) 303 evsel_list->threads->map[0] = child_pid; 304 305 /* 306 * Wait for the child to be ready to exec. 307 */ 308 close(child_ready_pipe[1]); 309 close(go_pipe[0]); 310 if (read(child_ready_pipe[0], &buf, 1) == -1) 311 perror("unable to read pipe"); 312 close(child_ready_pipe[0]); 313 } 314 315 list_for_each_entry(counter, &evsel_list->entries, node) { 316 if (create_perf_stat_counter(counter) < 0) { 317 if (errno == -EPERM || errno == -EACCES) { 318 error("You may not have permission to collect %sstats.\n" 319 "\t Consider tweaking" 320 " /proc/sys/kernel/perf_event_paranoid or running as root.", 321 system_wide ? "system-wide " : ""); 322 } else if (errno == ENOENT) { 323 error("%s event is not supported. ", event_name(counter)); 324 } else { 325 error("open_counter returned with %d (%s). " 326 "/bin/dmesg may provide additional information.\n", 327 errno, strerror(errno)); 328 } 329 if (child_pid != -1) 330 kill(child_pid, SIGTERM); 331 die("Not all events could be opened.\n"); 332 return -1; 333 } 334 } 335 336 if (perf_evlist__set_filters(evsel_list)) { 337 error("failed to set filter with %d (%s)\n", errno, 338 strerror(errno)); 339 return -1; 340 } 341 342 /* 343 * Enable counters and exec the command: 344 */ 345 t0 = rdclock(); 346 347 if (forks) { 348 close(go_pipe[1]); 349 wait(&status); 350 } else { 351 while(!done) sleep(1); 352 } 353 354 t1 = rdclock(); 355 356 update_stats(&walltime_nsecs_stats, t1 - t0); 357 358 if (no_aggr) { 359 list_for_each_entry(counter, &evsel_list->entries, node) { 360 read_counter(counter); 361 perf_evsel__close_fd(counter, evsel_list->cpus->nr, 1); 362 } 363 } else { 364 list_for_each_entry(counter, &evsel_list->entries, node) { 365 read_counter_aggr(counter); 366 perf_evsel__close_fd(counter, evsel_list->cpus->nr, 367 evsel_list->threads->nr); 368 } 369 } 370 371 return WEXITSTATUS(status); 372 } 373 374 static void print_noise(struct perf_evsel *evsel, double avg) 375 { 376 struct perf_stat *ps; 377 378 if (run_count == 1) 379 return; 380 381 ps = evsel->priv; 382 fprintf(stderr, " ( +- %7.3f%% )", 383 100 * stddev_stats(&ps->res_stats[0]) / avg); 384 } 385 386 static void nsec_printout(int cpu, struct perf_evsel *evsel, double avg) 387 { 388 double msecs = avg / 1e6; 389 char cpustr[16] = { '\0', }; 390 const char *fmt = csv_output ? "%s%.6f%s%s" : "%s%18.6f%s%-24s"; 391 392 if (no_aggr) 393 sprintf(cpustr, "CPU%*d%s", 394 csv_output ? 0 : -4, 395 evsel_list->cpus->map[cpu], csv_sep); 396 397 fprintf(stderr, fmt, cpustr, msecs, csv_sep, event_name(evsel)); 398 399 if (evsel->cgrp) 400 fprintf(stderr, "%s%s", csv_sep, evsel->cgrp->name); 401 402 if (csv_output) 403 return; 404 405 if (perf_evsel__match(evsel, SOFTWARE, SW_TASK_CLOCK)) 406 fprintf(stderr, " # %10.3f CPUs ", 407 avg / avg_stats(&walltime_nsecs_stats)); 408 } 409 410 static void abs_printout(int cpu, struct perf_evsel *evsel, double avg) 411 { 412 double total, ratio = 0.0; 413 char cpustr[16] = { '\0', }; 414 const char *fmt; 415 416 if (csv_output) 417 fmt = "%s%.0f%s%s"; 418 else if (big_num) 419 fmt = "%s%'18.0f%s%-24s"; 420 else 421 fmt = "%s%18.0f%s%-24s"; 422 423 if (no_aggr) 424 sprintf(cpustr, "CPU%*d%s", 425 csv_output ? 0 : -4, 426 evsel_list->cpus->map[cpu], csv_sep); 427 else 428 cpu = 0; 429 430 fprintf(stderr, fmt, cpustr, avg, csv_sep, event_name(evsel)); 431 432 if (evsel->cgrp) 433 fprintf(stderr, "%s%s", csv_sep, evsel->cgrp->name); 434 435 if (csv_output) 436 return; 437 438 if (perf_evsel__match(evsel, HARDWARE, HW_INSTRUCTIONS)) { 439 total = avg_stats(&runtime_cycles_stats[cpu]); 440 441 if (total) 442 ratio = avg / total; 443 444 fprintf(stderr, " # %10.3f IPC ", ratio); 445 } else if (perf_evsel__match(evsel, HARDWARE, HW_BRANCH_MISSES) && 446 runtime_branches_stats[cpu].n != 0) { 447 total = avg_stats(&runtime_branches_stats[cpu]); 448 449 if (total) 450 ratio = avg * 100 / total; 451 452 fprintf(stderr, " # %10.3f %% ", ratio); 453 454 } else if (runtime_nsecs_stats[cpu].n != 0) { 455 total = avg_stats(&runtime_nsecs_stats[cpu]); 456 457 if (total) 458 ratio = 1000.0 * avg / total; 459 460 fprintf(stderr, " # %10.3f M/sec", ratio); 461 } 462 } 463 464 /* 465 * Print out the results of a single counter: 466 * aggregated counts in system-wide mode 467 */ 468 static void print_counter_aggr(struct perf_evsel *counter) 469 { 470 struct perf_stat *ps = counter->priv; 471 double avg = avg_stats(&ps->res_stats[0]); 472 int scaled = counter->counts->scaled; 473 474 if (scaled == -1) { 475 fprintf(stderr, "%*s%s%*s", 476 csv_output ? 0 : 18, 477 "<not counted>", 478 csv_sep, 479 csv_output ? 0 : -24, 480 event_name(counter)); 481 482 if (counter->cgrp) 483 fprintf(stderr, "%s%s", csv_sep, counter->cgrp->name); 484 485 fputc('\n', stderr); 486 return; 487 } 488 489 if (nsec_counter(counter)) 490 nsec_printout(-1, counter, avg); 491 else 492 abs_printout(-1, counter, avg); 493 494 if (csv_output) { 495 fputc('\n', stderr); 496 return; 497 } 498 499 print_noise(counter, avg); 500 501 if (scaled) { 502 double avg_enabled, avg_running; 503 504 avg_enabled = avg_stats(&ps->res_stats[1]); 505 avg_running = avg_stats(&ps->res_stats[2]); 506 507 fprintf(stderr, " (scaled from %.2f%%)", 508 100 * avg_running / avg_enabled); 509 } 510 fprintf(stderr, "\n"); 511 } 512 513 /* 514 * Print out the results of a single counter: 515 * does not use aggregated count in system-wide 516 */ 517 static void print_counter(struct perf_evsel *counter) 518 { 519 u64 ena, run, val; 520 int cpu; 521 522 for (cpu = 0; cpu < evsel_list->cpus->nr; cpu++) { 523 val = counter->counts->cpu[cpu].val; 524 ena = counter->counts->cpu[cpu].ena; 525 run = counter->counts->cpu[cpu].run; 526 if (run == 0 || ena == 0) { 527 fprintf(stderr, "CPU%*d%s%*s%s%*s", 528 csv_output ? 0 : -4, 529 evsel_list->cpus->map[cpu], csv_sep, 530 csv_output ? 0 : 18, 531 "<not counted>", csv_sep, 532 csv_output ? 0 : -24, 533 event_name(counter)); 534 535 if (counter->cgrp) 536 fprintf(stderr, "%s%s", csv_sep, counter->cgrp->name); 537 538 fputc('\n', stderr); 539 continue; 540 } 541 542 if (nsec_counter(counter)) 543 nsec_printout(cpu, counter, val); 544 else 545 abs_printout(cpu, counter, val); 546 547 if (!csv_output) { 548 print_noise(counter, 1.0); 549 550 if (run != ena) { 551 fprintf(stderr, " (scaled from %.2f%%)", 552 100.0 * run / ena); 553 } 554 } 555 fputc('\n', stderr); 556 } 557 } 558 559 static void print_stat(int argc, const char **argv) 560 { 561 struct perf_evsel *counter; 562 int i; 563 564 fflush(stdout); 565 566 if (!csv_output) { 567 fprintf(stderr, "\n"); 568 fprintf(stderr, " Performance counter stats for "); 569 if(target_pid == -1 && target_tid == -1) { 570 fprintf(stderr, "\'%s", argv[0]); 571 for (i = 1; i < argc; i++) 572 fprintf(stderr, " %s", argv[i]); 573 } else if (target_pid != -1) 574 fprintf(stderr, "process id \'%d", target_pid); 575 else 576 fprintf(stderr, "thread id \'%d", target_tid); 577 578 fprintf(stderr, "\'"); 579 if (run_count > 1) 580 fprintf(stderr, " (%d runs)", run_count); 581 fprintf(stderr, ":\n\n"); 582 } 583 584 if (no_aggr) { 585 list_for_each_entry(counter, &evsel_list->entries, node) 586 print_counter(counter); 587 } else { 588 list_for_each_entry(counter, &evsel_list->entries, node) 589 print_counter_aggr(counter); 590 } 591 592 if (!csv_output) { 593 fprintf(stderr, "\n"); 594 fprintf(stderr, " %18.9f seconds time elapsed", 595 avg_stats(&walltime_nsecs_stats)/1e9); 596 if (run_count > 1) { 597 fprintf(stderr, " ( +- %7.3f%% )", 598 100*stddev_stats(&walltime_nsecs_stats) / 599 avg_stats(&walltime_nsecs_stats)); 600 } 601 fprintf(stderr, "\n\n"); 602 } 603 } 604 605 static volatile int signr = -1; 606 607 static void skip_signal(int signo) 608 { 609 if(child_pid == -1) 610 done = 1; 611 612 signr = signo; 613 } 614 615 static void sig_atexit(void) 616 { 617 if (child_pid != -1) 618 kill(child_pid, SIGTERM); 619 620 if (signr == -1) 621 return; 622 623 signal(signr, SIG_DFL); 624 kill(getpid(), signr); 625 } 626 627 static const char * const stat_usage[] = { 628 "perf stat [<options>] [<command>]", 629 NULL 630 }; 631 632 static int stat__set_big_num(const struct option *opt __used, 633 const char *s __used, int unset) 634 { 635 big_num_opt = unset ? 0 : 1; 636 return 0; 637 } 638 639 static const struct option options[] = { 640 OPT_CALLBACK('e', "event", &evsel_list, "event", 641 "event selector. use 'perf list' to list available events", 642 parse_events), 643 OPT_CALLBACK(0, "filter", &evsel_list, "filter", 644 "event filter", parse_filter), 645 OPT_BOOLEAN('i', "no-inherit", &no_inherit, 646 "child tasks do not inherit counters"), 647 OPT_INTEGER('p', "pid", &target_pid, 648 "stat events on existing process id"), 649 OPT_INTEGER('t', "tid", &target_tid, 650 "stat events on existing thread id"), 651 OPT_BOOLEAN('a', "all-cpus", &system_wide, 652 "system-wide collection from all CPUs"), 653 OPT_BOOLEAN('c', "scale", &scale, 654 "scale/normalize counters"), 655 OPT_INCR('v', "verbose", &verbose, 656 "be more verbose (show counter open errors, etc)"), 657 OPT_INTEGER('r', "repeat", &run_count, 658 "repeat command and print average + stddev (max: 100)"), 659 OPT_BOOLEAN('n', "null", &null_run, 660 "null run - dont start any counters"), 661 OPT_CALLBACK_NOOPT('B', "big-num", NULL, NULL, 662 "print large numbers with thousands\' separators", 663 stat__set_big_num), 664 OPT_STRING('C', "cpu", &cpu_list, "cpu", 665 "list of cpus to monitor in system-wide"), 666 OPT_BOOLEAN('A', "no-aggr", &no_aggr, 667 "disable CPU count aggregation"), 668 OPT_STRING('x', "field-separator", &csv_sep, "separator", 669 "print counts with custom separator"), 670 OPT_CALLBACK('G', "cgroup", &evsel_list, "name", 671 "monitor event in cgroup name only", 672 parse_cgroups), 673 OPT_END() 674 }; 675 676 int cmd_stat(int argc, const char **argv, const char *prefix __used) 677 { 678 struct perf_evsel *pos; 679 int status = -ENOMEM; 680 681 setlocale(LC_ALL, ""); 682 683 evsel_list = perf_evlist__new(NULL, NULL); 684 if (evsel_list == NULL) 685 return -ENOMEM; 686 687 argc = parse_options(argc, argv, options, stat_usage, 688 PARSE_OPT_STOP_AT_NON_OPTION); 689 690 if (csv_sep) 691 csv_output = true; 692 else 693 csv_sep = DEFAULT_SEPARATOR; 694 695 /* 696 * let the spreadsheet do the pretty-printing 697 */ 698 if (csv_output) { 699 /* User explicitely passed -B? */ 700 if (big_num_opt == 1) { 701 fprintf(stderr, "-B option not supported with -x\n"); 702 usage_with_options(stat_usage, options); 703 } else /* Nope, so disable big number formatting */ 704 big_num = false; 705 } else if (big_num_opt == 0) /* User passed --no-big-num */ 706 big_num = false; 707 708 if (!argc && target_pid == -1 && target_tid == -1) 709 usage_with_options(stat_usage, options); 710 if (run_count <= 0) 711 usage_with_options(stat_usage, options); 712 713 /* no_aggr, cgroup are for system-wide only */ 714 if ((no_aggr || nr_cgroups) && !system_wide) { 715 fprintf(stderr, "both cgroup and no-aggregation " 716 "modes only available in system-wide mode\n"); 717 718 usage_with_options(stat_usage, options); 719 } 720 721 /* Set attrs and nr_counters if no event is selected and !null_run */ 722 if (!null_run && !evsel_list->nr_entries) { 723 size_t c; 724 725 for (c = 0; c < ARRAY_SIZE(default_attrs); ++c) { 726 pos = perf_evsel__new(&default_attrs[c], c); 727 if (pos == NULL) 728 goto out; 729 perf_evlist__add(evsel_list, pos); 730 } 731 } 732 733 if (target_pid != -1) 734 target_tid = target_pid; 735 736 evsel_list->threads = thread_map__new(target_pid, target_tid); 737 if (evsel_list->threads == NULL) { 738 pr_err("Problems finding threads of monitor\n"); 739 usage_with_options(stat_usage, options); 740 } 741 742 if (system_wide) 743 evsel_list->cpus = cpu_map__new(cpu_list); 744 else 745 evsel_list->cpus = cpu_map__dummy_new(); 746 747 if (evsel_list->cpus == NULL) { 748 perror("failed to parse CPUs map"); 749 usage_with_options(stat_usage, options); 750 return -1; 751 } 752 753 list_for_each_entry(pos, &evsel_list->entries, node) { 754 if (perf_evsel__alloc_stat_priv(pos) < 0 || 755 perf_evsel__alloc_counts(pos, evsel_list->cpus->nr) < 0 || 756 perf_evsel__alloc_fd(pos, evsel_list->cpus->nr, evsel_list->threads->nr) < 0) 757 goto out_free_fd; 758 } 759 760 /* 761 * We dont want to block the signals - that would cause 762 * child tasks to inherit that and Ctrl-C would not work. 763 * What we want is for Ctrl-C to work in the exec()-ed 764 * task, but being ignored by perf stat itself: 765 */ 766 atexit(sig_atexit); 767 signal(SIGINT, skip_signal); 768 signal(SIGALRM, skip_signal); 769 signal(SIGABRT, skip_signal); 770 771 status = 0; 772 for (run_idx = 0; run_idx < run_count; run_idx++) { 773 if (run_count != 1 && verbose) 774 fprintf(stderr, "[ perf stat: executing run #%d ... ]\n", run_idx + 1); 775 status = run_perf_stat(argc, argv); 776 } 777 778 if (status != -1) 779 print_stat(argc, argv); 780 out_free_fd: 781 list_for_each_entry(pos, &evsel_list->entries, node) 782 perf_evsel__free_stat_priv(pos); 783 perf_evlist__delete_maps(evsel_list); 784 out: 785 perf_evlist__delete(evsel_list); 786 return status; 787 } 788