kernel/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 typedef int (*aggr_get_id_t)(struct cpu_map *m, int cpu);
 104
 105 static int                      run_count                       =  1;
 106 static bool                     no_inherit                      = false;
 107 static volatile pid_t           child_pid                       = -1;
 108 static bool                     null_run                        =  false;
 109 static int                      detailed_run                    =  0;
 110 static bool                     transaction_run;
 111 static bool                     big_num                         =  true;
 112 static int                      big_num_opt                     =  -1;
 113 static const char               *csv_sep                        = NULL;
 114 static bool                     csv_output                      = false;
 115 static bool                     group                           = false;
 116 static const char               *pre_cmd                        = NULL;
 117 static const char               *post_cmd                       = NULL;
 118 static bool                     sync_run                        = false;
 119 static unsigned int             initial_delay                   = 0;
 120 static unsigned int             unit_width                      = 4; /* strlen("unit") */
 121 static bool                     forever                         = false;
 122 static struct timespec          ref_time;
 123 static struct cpu_map           *aggr_map;
 124 static aggr_get_id_t            aggr_get_id;
 125 static bool                     append_file;
 126 static const char               *output_name;
 127 static int                      output_fd;
 128
 129 static volatile int done = 0;
 130
 131 static struct perf_stat_config stat_config = {
 132         .aggr_mode      = AGGR_GLOBAL,
 133         .scale          = true,
 134 };
 135
 136 static inline void diff_timespec(struct timespec *r, struct timespec *a,
 137                                  struct timespec *b)
 138 {
 139         r->tv_sec = a->tv_sec - b->tv_sec;
 140         if (a->tv_nsec < b->tv_nsec) {
 141                 r->tv_nsec = a->tv_nsec + 1000000000L - b->tv_nsec;
 142                 r->tv_sec--;
 143         } else {
 144                 r->tv_nsec = a->tv_nsec - b->tv_nsec ;
 145         }
 146 }
 147
 148 static void perf_stat__reset_stats(void)
 149 {
 150         perf_evlist__reset_stats(evsel_list);
 151         perf_stat__reset_shadow_stats();
 152 }
 153
 154 static int create_perf_stat_counter(struct perf_evsel *evsel)
 155 {
 156         struct perf_event_attr *attr = &evsel->attr;
 157
 158         if (stat_config.scale)
 159                 attr->read_format = PERF_FORMAT_TOTAL_TIME_ENABLED |
 160                                     PERF_FORMAT_TOTAL_TIME_RUNNING;
 161
 162         attr->inherit = !no_inherit;
 163
 164         if (target__has_cpu(&target))
 165                 return perf_evsel__open_per_cpu(evsel, perf_evsel__cpus(evsel));
 166
 167         if (!target__has_task(&target) && perf_evsel__is_group_leader(evsel)) {
 168                 attr->disabled = 1;
 169                 if (!initial_delay)
 170                         attr->enable_on_exec = 1;
 171         }
 172
 173         return perf_evsel__open_per_thread(evsel, evsel_list->threads);
 174 }
 175
 176 /*
 177  * Does the counter have nsecs as a unit?
 178  */
 179 static inline int nsec_counter(struct perf_evsel *evsel)
 180 {
 181         if (perf_evsel__match(evsel, SOFTWARE, SW_CPU_CLOCK) ||
 182             perf_evsel__match(evsel, SOFTWARE, SW_TASK_CLOCK))
 183                 return 1;
 184
 185         return 0;
 186 }
 187
 188 /*
 189  * Read out the results of a single counter:
 190  * do not aggregate counts across CPUs in system-wide mode
 191  */
 192 static int read_counter(struct perf_evsel *counter)
 193 {
 194         int nthreads = thread_map__nr(evsel_list->threads);
 195         int ncpus = perf_evsel__nr_cpus(counter);
 196         int cpu, thread;
 197
 198         if (!counter->supported)
 199                 return -ENOENT;
 200
 201         if (counter->system_wide)
 202                 nthreads = 1;
 203
 204         for (thread = 0; thread < nthreads; thread++) {
 205                 for (cpu = 0; cpu < ncpus; cpu++) {
 206                         struct perf_counts_values *count;
 207
 208                         count = perf_counts(counter->counts, cpu, thread);
 209                         if (perf_evsel__read(counter, cpu, thread, count))
 210                                 return -1;
 211                 }
 212         }
 213
 214         return 0;
 215 }
 216
 217 static void read_counters(bool close_counters)
 218 {
 219         struct perf_evsel *counter;
 220
 221         evlist__for_each(evsel_list, counter) {
 222                 if (read_counter(counter))
 223                         pr_debug("failed to read counter %s\n", counter->name);
 224
 225                 if (perf_stat_process_counter(&stat_config, counter))
 226                         pr_warning("failed to process counter %s\n", counter->name);
 227
 228                 if (close_counters) {
 229                         perf_evsel__close_fd(counter, perf_evsel__nr_cpus(counter),
 230                                              thread_map__nr(evsel_list->threads));
 231                 }
 232         }
 233 }
 234
 235 static void process_interval(void)
 236 {
 237         struct timespec ts, rs;
 238
 239         read_counters(false);
 240
 241         clock_gettime(CLOCK_MONOTONIC, &ts);
 242         diff_timespec(&rs, &ts, &ref_time);
 243
 244         print_counters(&rs, 0, NULL);
 245 }
 246
 247 static void handle_initial_delay(void)
 248 {
 249         struct perf_evsel *counter;
 250
 251         if (initial_delay) {
 252                 const int ncpus = cpu_map__nr(evsel_list->cpus),
 253                         nthreads = thread_map__nr(evsel_list->threads);
 254
 255                 usleep(initial_delay * 1000);
 256                 evlist__for_each(evsel_list, counter)
 257                         perf_evsel__enable(counter, ncpus, nthreads);
 258         }
 259 }
 260
 261 static volatile int workload_exec_errno;
 262
 263 /*
 264  * perf_evlist__prepare_workload will send a SIGUSR1
 265  * if the fork fails, since we asked by setting its
 266  * want_signal to true.
 267  */
 268 static void workload_exec_failed_signal(int signo __maybe_unused, siginfo_t *info,
 269                                         void *ucontext __maybe_unused)
 270 {
 271         workload_exec_errno = info->si_value.sival_int;
 272 }
 273
 274 static int __run_perf_stat(int argc, const char **argv)
 275 {
 276         int interval = stat_config.interval;
 277         char msg[512];
 278         unsigned long long t0, t1;
 279         struct perf_evsel *counter;
 280         struct timespec ts;
 281         size_t l;
 282         int status = 0;
 283         const bool forks = (argc > 0);
 284
 285         if (interval) {
 286                 ts.tv_sec  = interval / 1000;
 287                 ts.tv_nsec = (interval % 1000) * 1000000;
 288         } else {
 289                 ts.tv_sec  = 1;
 290                 ts.tv_nsec = 0;
 291         }
 292
 293         if (forks) {
 294                 if (perf_evlist__prepare_workload(evsel_list, &target, argv, false,
 295                                                   workload_exec_failed_signal) < 0) {
 296                         perror("failed to prepare workload");
 297                         return -1;
 298                 }
 299                 child_pid = evsel_list->workload.pid;
 300         }
 301
 302         if (group)
 303                 perf_evlist__set_leader(evsel_list);
 304
 305         evlist__for_each(evsel_list, counter) {
 306                 if (create_perf_stat_counter(counter) < 0) {
 307                         /*
 308                          * PPC returns ENXIO for HW counters until 2.6.37
 309                          * (behavior changed with commit b0a873e).
 310                          */
 311                         if (errno == EINVAL || errno == ENOSYS ||
 312                             errno == ENOENT || errno == EOPNOTSUPP ||
 313                             errno == ENXIO) {
 314                                 if (verbose)
 315                                         ui__warning("%s event is not supported by the kernel.\n",
 316                                                     perf_evsel__name(counter));
 317                                 counter->supported = false;
 318
 319                                 if ((counter->leader != counter) ||
 320                                     !(counter->leader->nr_members > 1))
 321                                         continue;
 322                         }
 323
 324                         perf_evsel__open_strerror(counter, &target,
 325                                                   errno, msg, sizeof(msg));
 326                         ui__error("%s\n", msg);
 327
 328                         if (child_pid != -1)
 329                                 kill(child_pid, SIGTERM);
 330
 331                         return -1;
 332                 }
 333                 counter->supported = true;
 334
 335                 l = strlen(counter->unit);
 336                 if (l > unit_width)
 337                         unit_width = l;
 338         }
 339
 340         if (perf_evlist__apply_filters(evsel_list, &counter)) {
 341                 error("failed to set filter \"%s\" on event %s with %d (%s)\n",
 342                         counter->filter, perf_evsel__name(counter), errno,
 343                         strerror_r(errno, msg, sizeof(msg)));
 344                 return -1;
 345         }
 346
 347         /*
 348          * Enable counters and exec the command:
 349          */
 350         t0 = rdclock();
 351         clock_gettime(CLOCK_MONOTONIC, &ref_time);
 352
 353         if (forks) {
 354                 perf_evlist__start_workload(evsel_list);
 355                 handle_initial_delay();
 356
 357                 if (interval) {
 358                         while (!waitpid(child_pid, &status, WNOHANG)) {
 359                                 nanosleep(&ts, NULL);
 360                                 process_interval();
 361                         }
 362                 }
 363                 wait(&status);
 364
 365                 if (workload_exec_errno) {
 366                         const char *emsg = strerror_r(workload_exec_errno, msg, sizeof(msg));
 367                         pr_err("Workload failed: %s\n", emsg);
 368                         return -1;
 369                 }
 370
 371                 if (WIFSIGNALED(status))
 372                         psignal(WTERMSIG(status), argv[0]);
 373         } else {
 374                 handle_initial_delay();
 375                 while (!done) {
 376                         nanosleep(&ts, NULL);
 377                         if (interval)
 378                                 process_interval();
 379                 }
 380         }
 381
 382         t1 = rdclock();
 383
 384         update_stats(&walltime_nsecs_stats, t1 - t0);
 385
 386         read_counters(true);
 387
 388         return WEXITSTATUS(status);
 389 }
 390
 391 static int run_perf_stat(int argc, const char **argv)
 392 {
 393         int ret;
 394
 395         if (pre_cmd) {
 396                 ret = system(pre_cmd);
 397                 if (ret)
 398                         return ret;
 399         }
 400
 401         if (sync_run)
 402                 sync();
 403
 404         ret = __run_perf_stat(argc, argv);
 405         if (ret)
 406                 return ret;
 407
 408         if (post_cmd) {
 409                 ret = system(post_cmd);
 410                 if (ret)
 411                         return ret;
 412         }
 413
 414         return ret;
 415 }
 416
 417 static void print_running(u64 run, u64 ena)
 418 {
 419         if (csv_output) {
 420                 fprintf(stat_config.output, "%s%" PRIu64 "%s%.2f",
 421                                         csv_sep,
 422                                         run,
 423                                         csv_sep,
 424                                         ena ? 100.0 * run / ena : 100.0);
 425         } else if (run != ena) {
 426                 fprintf(stat_config.output, "  (%.2f%%)", 100.0 * run / ena);
 427         }
 428 }
 429
 430 static void print_noise_pct(double total, double avg)
 431 {
 432         double pct = rel_stddev_stats(total, avg);
 433
 434         if (csv_output)
 435                 fprintf(stat_config.output, "%s%.2f%%", csv_sep, pct);
 436         else if (pct)
 437                 fprintf(stat_config.output, "  ( +-%6.2f%% )", pct);
 438 }
 439
 440 static void print_noise(struct perf_evsel *evsel, double avg)
 441 {
 442         struct perf_stat_evsel *ps;
 443
 444         if (run_count == 1)
 445                 return;
 446
 447         ps = evsel->priv;
 448         print_noise_pct(stddev_stats(&ps->res_stats[0]), avg);
 449 }
 450
 451 static void aggr_printout(struct perf_evsel *evsel, int id, int nr)
 452 {
 453         switch (stat_config.aggr_mode) {
 454         case AGGR_CORE:
 455                 fprintf(stat_config.output, "S%d-C%*d%s%*d%s",
 456                         cpu_map__id_to_socket(id),
 457                         csv_output ? 0 : -8,
 458                         cpu_map__id_to_cpu(id),
 459                         csv_sep,
 460                         csv_output ? 0 : 4,
 461                         nr,
 462                         csv_sep);
 463                 break;
 464         case AGGR_SOCKET:
 465                 fprintf(stat_config.output, "S%*d%s%*d%s",
 466                         csv_output ? 0 : -5,
 467                         id,
 468                         csv_sep,
 469                         csv_output ? 0 : 4,
 470                         nr,
 471                         csv_sep);
 472                         break;
 473         case AGGR_NONE:
 474                 fprintf(stat_config.output, "CPU%*d%s",
 475                         csv_output ? 0 : -4,
 476                         perf_evsel__cpus(evsel)->map[id], csv_sep);
 477                 break;
 478         case AGGR_THREAD:
 479                 fprintf(stat_config.output, "%*s-%*d%s",
 480                         csv_output ? 0 : 16,
 481                         thread_map__comm(evsel->threads, id),
 482                         csv_output ? 0 : -8,
 483                         thread_map__pid(evsel->threads, id),
 484                         csv_sep);
 485                 break;
 486         case AGGR_GLOBAL:
 487         case AGGR_UNSET:
 488         default:
 489                 break;
 490         }
 491 }
 492
 493 static void nsec_printout(int id, int nr, struct perf_evsel *evsel, double avg)
 494 {
 495         FILE *output = stat_config.output;
 496         double msecs = avg / 1e6;
 497         const char *fmt_v, *fmt_n;
 498         char name[25];
 499
 500         fmt_v = csv_output ? "%.6f%s" : "%18.6f%s";
 501         fmt_n = csv_output ? "%s" : "%-25s";
 502
 503         aggr_printout(evsel, id, nr);
 504
 505         scnprintf(name, sizeof(name), "%s%s",
 506                   perf_evsel__name(evsel), csv_output ? "" : " (msec)");
 507
 508         fprintf(output, fmt_v, msecs, csv_sep);
 509
 510         if (csv_output)
 511                 fprintf(output, "%s%s", evsel->unit, csv_sep);
 512         else
 513                 fprintf(output, "%-*s%s", unit_width, evsel->unit, csv_sep);
 514
 515         fprintf(output, fmt_n, name);
 516
 517         if (evsel->cgrp)
 518                 fprintf(output, "%s%s", csv_sep, evsel->cgrp->name);
 519 }
 520
 521 static void abs_printout(int id, int nr, struct perf_evsel *evsel, double avg)
 522 {
 523         FILE *output = stat_config.output;
 524         double sc =  evsel->scale;
 525         const char *fmt;
 526
 527         if (csv_output) {
 528                 fmt = sc != 1.0 ?  "%.2f%s" : "%.0f%s";
 529         } else {
 530                 if (big_num)
 531                         fmt = sc != 1.0 ? "%'18.2f%s" : "%'18.0f%s";
 532                 else
 533                         fmt = sc != 1.0 ? "%18.2f%s" : "%18.0f%s";
 534         }
 535
 536         aggr_printout(evsel, id, nr);
 537
 538         fprintf(output, fmt, avg, csv_sep);
 539
 540         if (evsel->unit)
 541                 fprintf(output, "%-*s%s",
 542                         csv_output ? 0 : unit_width,
 543                         evsel->unit, csv_sep);
 544
 545         fprintf(output, "%-*s", csv_output ? 0 : 25, perf_evsel__name(evsel));
 546
 547         if (evsel->cgrp)
 548                 fprintf(output, "%s%s", csv_sep, evsel->cgrp->name);
 549 }
 550
 551 static void printout(int id, int nr, struct perf_evsel *counter, double uval)
 552 {
 553         int cpu = cpu_map__id_to_cpu(id);
 554
 555         if (stat_config.aggr_mode == AGGR_GLOBAL)
 556                 cpu = 0;
 557
 558         if (nsec_counter(counter))
 559                 nsec_printout(id, nr, counter, uval);
 560         else
 561                 abs_printout(id, nr, counter, uval);
 562
 563         if (!csv_output && !stat_config.interval)
 564                 perf_stat__print_shadow_stats(stat_config.output, counter,
 565                                               uval, cpu,
 566                                               stat_config.aggr_mode);
 567 }
 568
 569 static void print_aggr(char *prefix)
 570 {
 571         FILE *output = stat_config.output;
 572         struct perf_evsel *counter;
 573         int cpu, s, s2, id, nr;
 574         double uval;
 575         u64 ena, run, val;
 576
 577         if (!(aggr_map || aggr_get_id))
 578                 return;
 579
 580         for (s = 0; s < aggr_map->nr; s++) {
 581                 id = aggr_map->map[s];
 582                 evlist__for_each(evsel_list, counter) {
 583                         val = ena = run = 0;
 584                         nr = 0;
 585                         for (cpu = 0; cpu < perf_evsel__nr_cpus(counter); cpu++) {
 586                                 s2 = aggr_get_id(perf_evsel__cpus(counter), cpu);
 587                                 if (s2 != id)
 588                                         continue;
 589                                 val += perf_counts(counter->counts, cpu, 0)->val;
 590                                 ena += perf_counts(counter->counts, cpu, 0)->ena;
 591                                 run += perf_counts(counter->counts, cpu, 0)->run;
 592                                 nr++;
 593                         }
 594                         if (prefix)
 595                                 fprintf(output, "%s", prefix);
 596
 597                         if (run == 0 || ena == 0) {
 598                                 aggr_printout(counter, id, nr);
 599
 600                                 fprintf(output, "%*s%s",
 601                                         csv_output ? 0 : 18,
 602                                         counter->supported ? CNTR_NOT_COUNTED : CNTR_NOT_SUPPORTED,
 603                                         csv_sep);
 604
 605                                 fprintf(output, "%-*s%s",
 606                                         csv_output ? 0 : unit_width,
 607                                         counter->unit, csv_sep);
 608
 609                                 fprintf(output, "%*s",
 610                                         csv_output ? 0 : -25,
 611                                         perf_evsel__name(counter));
 612
 613                                 if (counter->cgrp)
 614                                         fprintf(output, "%s%s",
 615                                                 csv_sep, counter->cgrp->name);
 616
 617                                 print_running(run, ena);
 618                                 fputc('\n', output);
 619                                 continue;
 620                         }
 621                         uval = val * counter->scale;
 622                         printout(id, nr, counter, uval);
 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                 printout(thread, 0, counter, uval);
 654
 655                 if (!csv_output)
 656                         print_noise(counter, 1.0);
 657
 658                 print_running(run, ena);
 659                 fputc('\n', output);
 660         }
 661 }
 662
 663 /*
 664  * Print out the results of a single counter:
 665  * aggregated counts in system-wide mode
 666  */
 667 static void print_counter_aggr(struct perf_evsel *counter, char *prefix)
 668 {
 669         FILE *output = stat_config.output;
 670         struct perf_stat_evsel *ps = counter->priv;
 671         double avg = avg_stats(&ps->res_stats[0]);
 672         int scaled = counter->counts->scaled;
 673         double uval;
 674         double avg_enabled, avg_running;
 675
 676         avg_enabled = avg_stats(&ps->res_stats[1]);
 677         avg_running = avg_stats(&ps->res_stats[2]);
 678
 679         if (prefix)
 680                 fprintf(output, "%s", prefix);
 681
 682         if (scaled == -1 || !counter->supported) {
 683                 fprintf(output, "%*s%s",
 684                         csv_output ? 0 : 18,
 685                         counter->supported ? CNTR_NOT_COUNTED : CNTR_NOT_SUPPORTED,
 686                         csv_sep);
 687                 fprintf(output, "%-*s%s",
 688                         csv_output ? 0 : unit_width,
 689                         counter->unit, csv_sep);
 690                 fprintf(output, "%*s",
 691                         csv_output ? 0 : -25,
 692                         perf_evsel__name(counter));
 693
 694                 if (counter->cgrp)
 695                         fprintf(output, "%s%s", csv_sep, counter->cgrp->name);
 696
 697                 print_running(avg_running, avg_enabled);
 698                 fputc('\n', output);
 699                 return;
 700         }
 701
 702         uval = avg * counter->scale;
 703         printout(-1, 0, counter, uval);
 704
 705         print_noise(counter, avg);
 706
 707         print_running(avg_running, avg_enabled);
 708         fprintf(output, "\n");
 709 }
 710
 711 /*
 712  * Print out the results of a single counter:
 713  * does not use aggregated count in system-wide
 714  */
 715 static void print_counter(struct perf_evsel *counter, char *prefix)
 716 {
 717         FILE *output = stat_config.output;
 718         u64 ena, run, val;
 719         double uval;
 720         int cpu;
 721
 722         for (cpu = 0; cpu < perf_evsel__nr_cpus(counter); cpu++) {
 723                 val = perf_counts(counter->counts, cpu, 0)->val;
 724                 ena = perf_counts(counter->counts, cpu, 0)->ena;
 725                 run = perf_counts(counter->counts, cpu, 0)->run;
 726
 727                 if (prefix)
 728                         fprintf(output, "%s", prefix);
 729
 730                 if (run == 0 || ena == 0) {
 731                         fprintf(output, "CPU%*d%s%*s%s",
 732                                 csv_output ? 0 : -4,
 733                                 perf_evsel__cpus(counter)->map[cpu], csv_sep,
 734                                 csv_output ? 0 : 18,
 735                                 counter->supported ? CNTR_NOT_COUNTED : CNTR_NOT_SUPPORTED,
 736                                 csv_sep);
 737
 738                                 fprintf(output, "%-*s%s",
 739                                         csv_output ? 0 : unit_width,
 740                                         counter->unit, csv_sep);
 741
 742                                 fprintf(output, "%*s",
 743                                         csv_output ? 0 : -25,
 744                                         perf_evsel__name(counter));
 745
 746                         if (counter->cgrp)
 747                                 fprintf(output, "%s%s",
 748                                         csv_sep, counter->cgrp->name);
 749
 750                         print_running(run, ena);
 751                         fputc('\n', output);
 752                         continue;
 753                 }
 754
 755                 uval = val * counter->scale;
 756                 printout(cpu, 0, counter, uval);
 757                 if (!csv_output)
 758                         print_noise(counter, 1.0);
 759                 print_running(run, ena);
 760
 761                 fputc('\n', output);
 762         }
 763 }
 764
 765 static void print_interval(char *prefix, struct timespec *ts)
 766 {
 767         FILE *output = stat_config.output;
 768         static int num_print_interval;
 769
 770         sprintf(prefix, "%6lu.%09lu%s", ts->tv_sec, ts->tv_nsec, csv_sep);
 771
 772         if (num_print_interval == 0 && !csv_output) {
 773                 switch (stat_config.aggr_mode) {
 774                 case AGGR_SOCKET:
 775                         fprintf(output, "#           time socket cpus             counts %*s events\n", unit_width, "unit");
 776                         break;
 777                 case AGGR_CORE:
 778                         fprintf(output, "#           time core         cpus             counts %*s events\n", unit_width, "unit");
 779                         break;
 780                 case AGGR_NONE:
 781                         fprintf(output, "#           time CPU                counts %*s events\n", unit_width, "unit");
 782                         break;
 783                 case AGGR_THREAD:
 784                         fprintf(output, "#           time             comm-pid                  counts %*s events\n", unit_width, "unit");
 785                         break;
 786                 case AGGR_GLOBAL:
 787                 default:
 788                         fprintf(output, "#           time             counts %*s events\n", unit_width, "unit");
 789                 case AGGR_UNSET:
 790                         break;
 791                 }
 792         }
 793
 794         if (++num_print_interval == 25)
 795                 num_print_interval = 0;
 796 }
 797
 798 static void print_header(int argc, const char **argv)
 799 {
 800         FILE *output = stat_config.output;
 801         int i;
 802
 803         fflush(stdout);
 804
 805         if (!csv_output) {
 806                 fprintf(output, "\n");
 807                 fprintf(output, " Performance counter stats for ");
 808                 if (target.system_wide)
 809                         fprintf(output, "\'system wide");
 810                 else if (target.cpu_list)
 811                         fprintf(output, "\'CPU(s) %s", target.cpu_list);
 812                 else if (!target__has_task(&target)) {
 813                         fprintf(output, "\'%s", argv[0]);
 814                         for (i = 1; i < argc; i++)
 815                                 fprintf(output, " %s", argv[i]);
 816                 } else if (target.pid)
 817                         fprintf(output, "process id \'%s", target.pid);
 818                 else
 819                         fprintf(output, "thread id \'%s", target.tid);
 820
 821                 fprintf(output, "\'");
 822                 if (run_count > 1)
 823                         fprintf(output, " (%d runs)", run_count);
 824                 fprintf(output, ":\n\n");
 825         }
 826 }
 827
 828 static void print_footer(void)
 829 {
 830         FILE *output = stat_config.output;
 831
 832         if (!null_run)
 833                 fprintf(output, "\n");
 834         fprintf(output, " %17.9f seconds time elapsed",
 835                         avg_stats(&walltime_nsecs_stats)/1e9);
 836         if (run_count > 1) {
 837                 fprintf(output, "                                        ");
 838                 print_noise_pct(stddev_stats(&walltime_nsecs_stats),
 839                                 avg_stats(&walltime_nsecs_stats));
 840         }
 841         fprintf(output, "\n\n");
 842 }
 843
 844 static void print_counters(struct timespec *ts, int argc, const char **argv)
 845 {
 846         int interval = stat_config.interval;
 847         struct perf_evsel *counter;
 848         char buf[64], *prefix = NULL;
 849
 850         if (interval)
 851                 print_interval(prefix = buf, ts);
 852         else
 853                 print_header(argc, argv);
 854
 855         switch (stat_config.aggr_mode) {
 856         case AGGR_CORE:
 857         case AGGR_SOCKET:
 858                 print_aggr(prefix);
 859                 break;
 860         case AGGR_THREAD:
 861                 evlist__for_each(evsel_list, counter)
 862                         print_aggr_thread(counter, prefix);
 863                 break;
 864         case AGGR_GLOBAL:
 865                 evlist__for_each(evsel_list, counter)
 866                         print_counter_aggr(counter, prefix);
 867                 break;
 868         case AGGR_NONE:
 869                 evlist__for_each(evsel_list, counter)
 870                         print_counter(counter, prefix);
 871                 break;
 872         case AGGR_UNSET:
 873         default:
 874                 break;
 875         }
 876
 877         if (!interval && !csv_output)
 878                 print_footer();
 879
 880         fflush(stat_config.output);
 881 }
 882
 883 static volatile int signr = -1;
 884
 885 static void skip_signal(int signo)
 886 {
 887         if ((child_pid == -1) || stat_config.interval)
 888                 done = 1;
 889
 890         signr = signo;
 891         /*
 892          * render child_pid harmless
 893          * won't send SIGTERM to a random
 894          * process in case of race condition
 895          * and fast PID recycling
 896          */
 897         child_pid = -1;
 898 }
 899
 900 static void sig_atexit(void)
 901 {
 902         sigset_t set, oset;
 903
 904         /*
 905          * avoid race condition with SIGCHLD handler
 906          * in skip_signal() which is modifying child_pid
 907          * goal is to avoid send SIGTERM to a random
 908          * process
 909          */
 910         sigemptyset(&set);
 911         sigaddset(&set, SIGCHLD);
 912         sigprocmask(SIG_BLOCK, &set, &oset);
 913
 914         if (child_pid != -1)
 915                 kill(child_pid, SIGTERM);
 916
 917         sigprocmask(SIG_SETMASK, &oset, NULL);
 918
 919         if (signr == -1)
 920                 return;
 921
 922         signal(signr, SIG_DFL);
 923         kill(getpid(), signr);
 924 }
 925
 926 static int stat__set_big_num(const struct option *opt __maybe_unused,
 927                              const char *s __maybe_unused, int unset)
 928 {
 929         big_num_opt = unset ? 0 : 1;
 930         return 0;
 931 }
 932
 933 static const struct option stat_options[] = {
 934         OPT_BOOLEAN('T', "transaction", &transaction_run,
 935                     "hardware transaction statistics"),
 936         OPT_CALLBACK('e', "event", &evsel_list, "event",
 937                      "event selector. use 'perf list' to list available events",
 938                      parse_events_option),
 939         OPT_CALLBACK(0, "filter", &evsel_list, "filter",
 940                      "event filter", parse_filter),
 941         OPT_BOOLEAN('i', "no-inherit", &no_inherit,
 942                     "child tasks do not inherit counters"),
 943         OPT_STRING('p', "pid", &target.pid, "pid",
 944                    "stat events on existing process id"),
 945         OPT_STRING('t', "tid", &target.tid, "tid",
 946                    "stat events on existing thread id"),
 947         OPT_BOOLEAN('a', "all-cpus", &target.system_wide,
 948                     "system-wide collection from all CPUs"),
 949         OPT_BOOLEAN('g', "group", &group,
 950                     "put the counters into a counter group"),
 951         OPT_BOOLEAN('c', "scale", &stat_config.scale, "scale/normalize counters"),
 952         OPT_INCR('v', "verbose", &verbose,
 953                     "be more verbose (show counter open errors, etc)"),
 954         OPT_INTEGER('r', "repeat", &run_count,
 955                     "repeat command and print average + stddev (max: 100, forever: 0)"),
 956         OPT_BOOLEAN('n', "null", &null_run,
 957                     "null run - dont start any counters"),
 958         OPT_INCR('d', "detailed", &detailed_run,
 959                     "detailed run - start a lot of events"),
 960         OPT_BOOLEAN('S', "sync", &sync_run,
 961                     "call sync() before starting a run"),
 962         OPT_CALLBACK_NOOPT('B', "big-num", NULL, NULL,
 963                            "print large numbers with thousands\' separators",
 964                            stat__set_big_num),
 965         OPT_STRING('C', "cpu", &target.cpu_list, "cpu",
 966                     "list of cpus to monitor in system-wide"),
 967         OPT_SET_UINT('A', "no-aggr", &stat_config.aggr_mode,
 968                     "disable CPU count aggregation", AGGR_NONE),
 969         OPT_STRING('x', "field-separator", &csv_sep, "separator",
 970                    "print counts with custom separator"),
 971         OPT_CALLBACK('G', "cgroup", &evsel_list, "name",
 972                      "monitor event in cgroup name only", parse_cgroups),
 973         OPT_STRING('o', "output", &output_name, "file", "output file name"),
 974         OPT_BOOLEAN(0, "append", &append_file, "append to the output file"),
 975         OPT_INTEGER(0, "log-fd", &output_fd,
 976                     "log output to fd, instead of stderr"),
 977         OPT_STRING(0, "pre", &pre_cmd, "command",
 978                         "command to run prior to the measured command"),
 979         OPT_STRING(0, "post", &post_cmd, "command",
 980                         "command to run after to the measured command"),
 981         OPT_UINTEGER('I', "interval-print", &stat_config.interval,
 982                     "print counts at regular interval in ms (>= 10)"),
 983         OPT_SET_UINT(0, "per-socket", &stat_config.aggr_mode,
 984                      "aggregate counts per processor socket", AGGR_SOCKET),
 985         OPT_SET_UINT(0, "per-core", &stat_config.aggr_mode,
 986                      "aggregate counts per physical processor core", AGGR_CORE),
 987         OPT_SET_UINT(0, "per-thread", &stat_config.aggr_mode,
 988                      "aggregate counts per thread", AGGR_THREAD),
 989         OPT_UINTEGER('D', "delay", &initial_delay,
 990                      "ms to wait before starting measurement after program start"),
 991         OPT_END()
 992 };
 993
 994 static int perf_stat__get_socket(struct cpu_map *map, int cpu)
 995 {
 996         return cpu_map__get_socket(map, cpu, NULL);
 997 }
 998
 999 static int perf_stat__get_core(struct cpu_map *map, int cpu)
1000 {
1001         return cpu_map__get_core(map, cpu, NULL);
1002 }
1003
1004 static int cpu_map__get_max(struct cpu_map *map)
1005 {
1006         int i, max = -1;
1007
1008         for (i = 0; i < map->nr; i++) {
1009                 if (map->map[i] > max)
1010                         max = map->map[i];
1011         }
1012
1013         return max;
1014 }
1015
1016 static struct cpu_map *cpus_aggr_map;
1017
1018 static int perf_stat__get_aggr(aggr_get_id_t get_id, struct cpu_map *map, int idx)
1019 {
1020         int cpu;
1021
1022         if (idx >= map->nr)
1023                 return -1;
1024
1025         cpu = map->map[idx];
1026
1027         if (cpus_aggr_map->map[cpu] == -1)
1028                 cpus_aggr_map->map[cpu] = get_id(map, idx);
1029
1030         return cpus_aggr_map->map[cpu];
1031 }
1032
1033 static int perf_stat__get_socket_cached(struct cpu_map *map, int idx)
1034 {
1035         return perf_stat__get_aggr(perf_stat__get_socket, map, idx);
1036 }
1037
1038 static int perf_stat__get_core_cached(struct cpu_map *map, int idx)
1039 {
1040         return perf_stat__get_aggr(perf_stat__get_core, map, idx);
1041 }
1042
1043 static int perf_stat_init_aggr_mode(void)
1044 {
1045         int nr;
1046
1047         switch (stat_config.aggr_mode) {
1048         case AGGR_SOCKET:
1049                 if (cpu_map__build_socket_map(evsel_list->cpus, &aggr_map)) {
1050                         perror("cannot build socket map");
1051                         return -1;
1052                 }
1053                 aggr_get_id = perf_stat__get_socket_cached;
1054                 break;
1055         case AGGR_CORE:
1056                 if (cpu_map__build_core_map(evsel_list->cpus, &aggr_map)) {
1057                         perror("cannot build core map");
1058                         return -1;
1059                 }
1060                 aggr_get_id = perf_stat__get_core_cached;
1061                 break;
1062         case AGGR_NONE:
1063         case AGGR_GLOBAL:
1064         case AGGR_THREAD:
1065         case AGGR_UNSET:
1066         default:
1067                 break;
1068         }
1069
1070         /*
1071          * The evsel_list->cpus is the base we operate on,
1072          * taking the highest cpu number to be the size of
1073          * the aggregation translate cpumap.
1074          */
1075         nr = cpu_map__get_max(evsel_list->cpus);
1076         cpus_aggr_map = cpu_map__empty_new(nr + 1);
1077         return cpus_aggr_map ? 0 : -ENOMEM;
1078 }
1079
1080 /*
1081  * Add default attributes, if there were no attributes specified or
1082  * if -d/--detailed, -d -d or -d -d -d is used:
1083  */
1084 static int add_default_attributes(void)
1085 {
1086         struct perf_event_attr default_attrs[] = {
1087
1088   { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_TASK_CLOCK              },
1089   { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_CONTEXT_SWITCHES        },
1090   { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_CPU_MIGRATIONS          },
1091   { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_PAGE_FAULTS             },
1092
1093   { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_CPU_CYCLES              },
1094   { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_STALLED_CYCLES_FRONTEND },
1095   { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_STALLED_CYCLES_BACKEND  },
1096   { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_INSTRUCTIONS            },
1097   { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_BRANCH_INSTRUCTIONS     },
1098   { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_BRANCH_MISSES           },
1099
1100 };
1101
1102 /*
1103  * Detailed stats (-d), covering the L1 and last level data caches:
1104  */
1105         struct perf_event_attr detailed_attrs[] = {
1106
1107   { .type = PERF_TYPE_HW_CACHE,
1108     .config =
1109          PERF_COUNT_HW_CACHE_L1D                <<  0  |
1110         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
1111         (PERF_COUNT_HW_CACHE_RESULT_ACCESS      << 16)                          },
1112
1113   { .type = PERF_TYPE_HW_CACHE,
1114     .config =
1115          PERF_COUNT_HW_CACHE_L1D                <<  0  |
1116         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
1117         (PERF_COUNT_HW_CACHE_RESULT_MISS        << 16)                          },
1118
1119   { .type = PERF_TYPE_HW_CACHE,
1120     .config =
1121          PERF_COUNT_HW_CACHE_LL                 <<  0  |
1122         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
1123         (PERF_COUNT_HW_CACHE_RESULT_ACCESS      << 16)                          },
1124
1125   { .type = PERF_TYPE_HW_CACHE,
1126     .config =
1127          PERF_COUNT_HW_CACHE_LL                 <<  0  |
1128         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
1129         (PERF_COUNT_HW_CACHE_RESULT_MISS        << 16)                          },
1130 };
1131
1132 /*
1133  * Very detailed stats (-d -d), covering the instruction cache and the TLB caches:
1134  */
1135         struct perf_event_attr very_detailed_attrs[] = {
1136
1137   { .type = PERF_TYPE_HW_CACHE,
1138     .config =
1139          PERF_COUNT_HW_CACHE_L1I                <<  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_L1I                <<  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_DTLB               <<  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_DTLB               <<  0  |
1158         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
1159         (PERF_COUNT_HW_CACHE_RESULT_MISS        << 16)                          },
1160
1161   { .type = PERF_TYPE_HW_CACHE,
1162     .config =
1163          PERF_COUNT_HW_CACHE_ITLB               <<  0  |
1164         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
1165         (PERF_COUNT_HW_CACHE_RESULT_ACCESS      << 16)                          },
1166
1167   { .type = PERF_TYPE_HW_CACHE,
1168     .config =
1169          PERF_COUNT_HW_CACHE_ITLB               <<  0  |
1170         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
1171         (PERF_COUNT_HW_CACHE_RESULT_MISS        << 16)                          },
1172
1173 };
1174
1175 /*
1176  * Very, very detailed stats (-d -d -d), adding prefetch events:
1177  */
1178         struct perf_event_attr very_very_detailed_attrs[] = {
1179
1180   { .type = PERF_TYPE_HW_CACHE,
1181     .config =
1182          PERF_COUNT_HW_CACHE_L1D                <<  0  |
1183         (PERF_COUNT_HW_CACHE_OP_PREFETCH        <<  8) |
1184         (PERF_COUNT_HW_CACHE_RESULT_ACCESS      << 16)                          },
1185
1186   { .type = PERF_TYPE_HW_CACHE,
1187     .config =
1188          PERF_COUNT_HW_CACHE_L1D                <<  0  |
1189         (PERF_COUNT_HW_CACHE_OP_PREFETCH        <<  8) |
1190         (PERF_COUNT_HW_CACHE_RESULT_MISS        << 16)                          },
1191 };
1192
1193         /* Set attrs if no event is selected and !null_run: */
1194         if (null_run)
1195                 return 0;
1196
1197         if (transaction_run) {
1198                 int err;
1199                 if (pmu_have_event("cpu", "cycles-ct") &&
1200                     pmu_have_event("cpu", "el-start"))
1201                         err = parse_events(evsel_list, transaction_attrs, NULL);
1202                 else
1203                         err = parse_events(evsel_list, transaction_limited_attrs, NULL);
1204                 if (err) {
1205                         fprintf(stderr, "Cannot set up transaction events\n");
1206                         return -1;
1207                 }
1208                 return 0;
1209         }
1210
1211         if (!evsel_list->nr_entries) {
1212                 if (perf_evlist__add_default_attrs(evsel_list, default_attrs) < 0)
1213                         return -1;
1214         }
1215
1216         /* Detailed events get appended to the event list: */
1217
1218         if (detailed_run <  1)
1219                 return 0;
1220
1221         /* Append detailed run extra attributes: */
1222         if (perf_evlist__add_default_attrs(evsel_list, detailed_attrs) < 0)
1223                 return -1;
1224
1225         if (detailed_run < 2)
1226                 return 0;
1227
1228         /* Append very detailed run extra attributes: */
1229         if (perf_evlist__add_default_attrs(evsel_list, very_detailed_attrs) < 0)
1230                 return -1;
1231
1232         if (detailed_run < 3)
1233                 return 0;
1234
1235         /* Append very, very detailed run extra attributes: */
1236         return perf_evlist__add_default_attrs(evsel_list, very_very_detailed_attrs);
1237 }
1238
1239 int cmd_stat(int argc, const char **argv, const char *prefix __maybe_unused)
1240 {
1241         const char * const stat_usage[] = {
1242                 "perf stat [<options>] [<command>]",
1243                 NULL
1244         };
1245         int status = -EINVAL, run_idx;
1246         const char *mode;
1247         FILE *output = stderr;
1248         unsigned int interval;
1249
1250         setlocale(LC_ALL, "");
1251
1252         evsel_list = perf_evlist__new();
1253         if (evsel_list == NULL)
1254                 return -ENOMEM;
1255
1256         argc = parse_options(argc, argv, stat_options, stat_usage,
1257                 PARSE_OPT_STOP_AT_NON_OPTION);
1258
1259         interval = stat_config.interval;
1260
1261         if (output_name && strcmp(output_name, "-"))
1262                 output = NULL;
1263
1264         if (output_name && output_fd) {
1265                 fprintf(stderr, "cannot use both --output and --log-fd\n");
1266                 parse_options_usage(stat_usage, stat_options, "o", 1);
1267                 parse_options_usage(NULL, stat_options, "log-fd", 0);
1268                 goto out;
1269         }
1270
1271         if (output_fd < 0) {
1272                 fprintf(stderr, "argument to --log-fd must be a > 0\n");
1273                 parse_options_usage(stat_usage, stat_options, "log-fd", 0);
1274                 goto out;
1275         }
1276
1277         if (!output) {
1278                 struct timespec tm;
1279                 mode = append_file ? "a" : "w";
1280
1281                 output = fopen(output_name, mode);
1282                 if (!output) {
1283                         perror("failed to create output file");
1284                         return -1;
1285                 }
1286                 clock_gettime(CLOCK_REALTIME, &tm);
1287                 fprintf(output, "# started on %s\n", ctime(&tm.tv_sec));
1288         } else if (output_fd > 0) {
1289                 mode = append_file ? "a" : "w";
1290                 output = fdopen(output_fd, mode);
1291                 if (!output) {
1292                         perror("Failed opening logfd");
1293                         return -errno;
1294                 }
1295         }
1296
1297         stat_config.output = output;
1298
1299         if (csv_sep) {
1300                 csv_output = true;
1301                 if (!strcmp(csv_sep, "\\t"))
1302                         csv_sep = "\t";
1303         } else
1304                 csv_sep = DEFAULT_SEPARATOR;
1305
1306         /*
1307          * let the spreadsheet do the pretty-printing
1308          */
1309         if (csv_output) {
1310                 /* User explicitly passed -B? */
1311                 if (big_num_opt == 1) {
1312                         fprintf(stderr, "-B option not supported with -x\n");
1313                         parse_options_usage(stat_usage, stat_options, "B", 1);
1314                         parse_options_usage(NULL, stat_options, "x", 1);
1315                         goto out;
1316                 } else /* Nope, so disable big number formatting */
1317                         big_num = false;
1318         } else if (big_num_opt == 0) /* User passed --no-big-num */
1319                 big_num = false;
1320
1321         if (!argc && target__none(&target))
1322                 usage_with_options(stat_usage, stat_options);
1323
1324         if (run_count < 0) {
1325                 pr_err("Run count must be a positive number\n");
1326                 parse_options_usage(stat_usage, stat_options, "r", 1);
1327                 goto out;
1328         } else if (run_count == 0) {
1329                 forever = true;
1330                 run_count = 1;
1331         }
1332
1333         if ((stat_config.aggr_mode == AGGR_THREAD) && !target__has_task(&target)) {
1334                 fprintf(stderr, "The --per-thread option is only available "
1335                         "when monitoring via -p -t options.\n");
1336                 parse_options_usage(NULL, stat_options, "p", 1);
1337                 parse_options_usage(NULL, stat_options, "t", 1);
1338                 goto out;
1339         }
1340
1341         /*
1342          * no_aggr, cgroup are for system-wide only
1343          * --per-thread is aggregated per thread, we dont mix it with cpu mode
1344          */
1345         if (((stat_config.aggr_mode != AGGR_GLOBAL &&
1346               stat_config.aggr_mode != AGGR_THREAD) || nr_cgroups) &&
1347             !target__has_cpu(&target)) {
1348                 fprintf(stderr, "both cgroup and no-aggregation "
1349                         "modes only available in system-wide mode\n");
1350
1351                 parse_options_usage(stat_usage, stat_options, "G", 1);
1352                 parse_options_usage(NULL, stat_options, "A", 1);
1353                 parse_options_usage(NULL, stat_options, "a", 1);
1354                 goto out;
1355         }
1356
1357         if (add_default_attributes())
1358                 goto out;
1359
1360         target__validate(&target);
1361
1362         if (perf_evlist__create_maps(evsel_list, &target) < 0) {
1363                 if (target__has_task(&target)) {
1364                         pr_err("Problems finding threads of monitor\n");
1365                         parse_options_usage(stat_usage, stat_options, "p", 1);
1366                         parse_options_usage(NULL, stat_options, "t", 1);
1367                 } else if (target__has_cpu(&target)) {
1368                         perror("failed to parse CPUs map");
1369                         parse_options_usage(stat_usage, stat_options, "C", 1);
1370                         parse_options_usage(NULL, stat_options, "a", 1);
1371                 }
1372                 goto out;
1373         }
1374
1375         /*
1376          * Initialize thread_map with comm names,
1377          * so we could print it out on output.
1378          */
1379         if (stat_config.aggr_mode == AGGR_THREAD)
1380                 thread_map__read_comms(evsel_list->threads);
1381
1382         if (interval && interval < 100) {
1383                 if (interval < 10) {
1384                         pr_err("print interval must be >= 10ms\n");
1385                         parse_options_usage(stat_usage, stat_options, "I", 1);
1386                         goto out;
1387                 } else
1388                         pr_warning("print interval < 100ms. "
1389                                    "The overhead percentage could be high in some cases. "
1390                                    "Please proceed with caution.\n");
1391         }
1392
1393         if (perf_evlist__alloc_stats(evsel_list, interval))
1394                 goto out;
1395
1396         if (perf_stat_init_aggr_mode())
1397                 goto out;
1398
1399         /*
1400          * We dont want to block the signals - that would cause
1401          * child tasks to inherit that and Ctrl-C would not work.
1402          * What we want is for Ctrl-C to work in the exec()-ed
1403          * task, but being ignored by perf stat itself:
1404          */
1405         atexit(sig_atexit);
1406         if (!forever)
1407                 signal(SIGINT,  skip_signal);
1408         signal(SIGCHLD, skip_signal);
1409         signal(SIGALRM, skip_signal);
1410         signal(SIGABRT, skip_signal);
1411
1412         status = 0;
1413         for (run_idx = 0; forever || run_idx < run_count; run_idx++) {
1414                 if (run_count != 1 && verbose)
1415                         fprintf(output, "[ perf stat: executing run #%d ... ]\n",
1416                                 run_idx + 1);
1417
1418                 status = run_perf_stat(argc, argv);
1419                 if (forever && status != -1) {
1420                         print_counters(NULL, argc, argv);
1421                         perf_stat__reset_stats();
1422                 }
1423         }
1424
1425         if (!forever && status != -1 && !interval)
1426                 print_counters(NULL, argc, argv);
1427
1428         perf_evlist__free_stats(evsel_list);
1429 out:
1430         perf_evlist__delete(evsel_list);
1431         return status;
1432 }