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