tools/perf/builtin-stat.c

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