Pileus Git - ~andy/linux/blob - 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/util.h"
  47 #include "util/parse-options.h"
  48 #include "util/parse-events.h"
  49 #include "util/event.h"
  50 #include "util/evlist.h"
  51 #include "util/evsel.h"
  52 #include "util/debug.h"
  53 #include "util/color.h"
  54 #include "util/stat.h"
  55 #include "util/header.h"
  56 #include "util/cpumap.h"
  57 #include "util/thread.h"
  58 #include "util/thread_map.h"
  59
  60 #include <sys/prctl.h>
  61 #include <locale.h>
  62
  63 #define DEFAULT_SEPARATOR       " "
  64 #define CNTR_NOT_SUPPORTED      "<not supported>"
  65 #define CNTR_NOT_COUNTED        "<not counted>"
  66
  67 static struct perf_evlist       *evsel_list;
  68
  69 static struct perf_target       target = {
  70         .uid    = UINT_MAX,
  71 };
  72
  73 static int                      run_count                       =  1;
  74 static bool                     no_inherit                      = false;
  75 static bool                     scale                           =  true;
  76 static bool                     no_aggr                         = false;
  77 static pid_t                    child_pid                       = -1;
  78 static bool                     null_run                        =  false;
  79 static int                      detailed_run                    =  0;
  80 static bool                     big_num                         =  true;
  81 static int                      big_num_opt                     =  -1;
  82 static const char               *csv_sep                        = NULL;
  83 static bool                     csv_output                      = false;
  84 static bool                     group                           = false;
  85 static FILE                     *output                         = NULL;
  86
  87 static volatile int done = 0;
  88
  89 struct perf_stat {
  90         struct stats      res_stats[3];
  91 };
  92
  93 static int perf_evsel__alloc_stat_priv(struct perf_evsel *evsel)
  94 {
  95         evsel->priv = zalloc(sizeof(struct perf_stat));
  96         return evsel->priv == NULL ? -ENOMEM : 0;
  97 }
  98
  99 static void perf_evsel__free_stat_priv(struct perf_evsel *evsel)
 100 {
 101         free(evsel->priv);
 102         evsel->priv = NULL;
 103 }
 104
 105 static inline struct cpu_map *perf_evsel__cpus(struct perf_evsel *evsel)
 106 {
 107         return (evsel->cpus && !target.cpu_list) ? evsel->cpus : evsel_list->cpus;
 108 }
 109
 110 static inline int perf_evsel__nr_cpus(struct perf_evsel *evsel)
 111 {
 112         return perf_evsel__cpus(evsel)->nr;
 113 }
 114
 115 static struct stats runtime_nsecs_stats[MAX_NR_CPUS];
 116 static struct stats runtime_cycles_stats[MAX_NR_CPUS];
 117 static struct stats runtime_stalled_cycles_front_stats[MAX_NR_CPUS];
 118 static struct stats runtime_stalled_cycles_back_stats[MAX_NR_CPUS];
 119 static struct stats runtime_branches_stats[MAX_NR_CPUS];
 120 static struct stats runtime_cacherefs_stats[MAX_NR_CPUS];
 121 static struct stats runtime_l1_dcache_stats[MAX_NR_CPUS];
 122 static struct stats runtime_l1_icache_stats[MAX_NR_CPUS];
 123 static struct stats runtime_ll_cache_stats[MAX_NR_CPUS];
 124 static struct stats runtime_itlb_cache_stats[MAX_NR_CPUS];
 125 static struct stats runtime_dtlb_cache_stats[MAX_NR_CPUS];
 126 static struct stats walltime_nsecs_stats;
 127
 128 static int create_perf_stat_counter(struct perf_evsel *evsel,
 129                                     struct perf_evsel *first)
 130 {
 131         struct perf_event_attr *attr = &evsel->attr;
 132         bool exclude_guest_missing = false;
 133         int ret;
 134
 135         if (scale)
 136                 attr->read_format = PERF_FORMAT_TOTAL_TIME_ENABLED |
 137                                     PERF_FORMAT_TOTAL_TIME_RUNNING;
 138
 139         attr->inherit = !no_inherit;
 140
 141 retry:
 142         if (exclude_guest_missing)
 143                 evsel->attr.exclude_guest = evsel->attr.exclude_host = 0;
 144
 145         if (perf_target__has_cpu(&target)) {
 146                 ret = perf_evsel__open_per_cpu(evsel, perf_evsel__cpus(evsel));
 147                 if (ret)
 148                         goto check_ret;
 149                 return 0;
 150         }
 151
 152         if (!perf_target__has_task(&target) && (!group || evsel == first)) {
 153                 attr->disabled = 1;
 154                 attr->enable_on_exec = 1;
 155         }
 156
 157         ret = perf_evsel__open_per_thread(evsel, evsel_list->threads);
 158         if (!ret)
 159                 return 0;
 160         /* fall through */
 161 check_ret:
 162         if (ret && errno == EINVAL) {
 163                 if (!exclude_guest_missing &&
 164                     (evsel->attr.exclude_guest || evsel->attr.exclude_host)) {
 165                         pr_debug("Old kernel, cannot exclude "
 166                                  "guest or host samples.\n");
 167                         exclude_guest_missing = true;
 168                         goto retry;
 169                 }
 170         }
 171         return ret;
 172 }
 173
 174 /*
 175  * Does the counter have nsecs as a unit?
 176  */
 177 static inline int nsec_counter(struct perf_evsel *evsel)
 178 {
 179         if (perf_evsel__match(evsel, SOFTWARE, SW_CPU_CLOCK) ||
 180             perf_evsel__match(evsel, SOFTWARE, SW_TASK_CLOCK))
 181                 return 1;
 182
 183         return 0;
 184 }
 185
 186 /*
 187  * Update various tracking values we maintain to print
 188  * more semantic information such as miss/hit ratios,
 189  * instruction rates, etc:
 190  */
 191 static void update_shadow_stats(struct perf_evsel *counter, u64 *count)
 192 {
 193         if (perf_evsel__match(counter, SOFTWARE, SW_TASK_CLOCK))
 194                 update_stats(&runtime_nsecs_stats[0], count[0]);
 195         else if (perf_evsel__match(counter, HARDWARE, HW_CPU_CYCLES))
 196                 update_stats(&runtime_cycles_stats[0], count[0]);
 197         else if (perf_evsel__match(counter, HARDWARE, HW_STALLED_CYCLES_FRONTEND))
 198                 update_stats(&runtime_stalled_cycles_front_stats[0], count[0]);
 199         else if (perf_evsel__match(counter, HARDWARE, HW_STALLED_CYCLES_BACKEND))
 200                 update_stats(&runtime_stalled_cycles_back_stats[0], count[0]);
 201         else if (perf_evsel__match(counter, HARDWARE, HW_BRANCH_INSTRUCTIONS))
 202                 update_stats(&runtime_branches_stats[0], count[0]);
 203         else if (perf_evsel__match(counter, HARDWARE, HW_CACHE_REFERENCES))
 204                 update_stats(&runtime_cacherefs_stats[0], count[0]);
 205         else if (perf_evsel__match(counter, HW_CACHE, HW_CACHE_L1D))
 206                 update_stats(&runtime_l1_dcache_stats[0], count[0]);
 207         else if (perf_evsel__match(counter, HW_CACHE, HW_CACHE_L1I))
 208                 update_stats(&runtime_l1_icache_stats[0], count[0]);
 209         else if (perf_evsel__match(counter, HW_CACHE, HW_CACHE_LL))
 210                 update_stats(&runtime_ll_cache_stats[0], count[0]);
 211         else if (perf_evsel__match(counter, HW_CACHE, HW_CACHE_DTLB))
 212                 update_stats(&runtime_dtlb_cache_stats[0], count[0]);
 213         else if (perf_evsel__match(counter, HW_CACHE, HW_CACHE_ITLB))
 214                 update_stats(&runtime_itlb_cache_stats[0], count[0]);
 215 }
 216
 217 /*
 218  * Read out the results of a single counter:
 219  * aggregate counts across CPUs in system-wide mode
 220  */
 221 static int read_counter_aggr(struct perf_evsel *counter)
 222 {
 223         struct perf_stat *ps = counter->priv;
 224         u64 *count = counter->counts->aggr.values;
 225         int i;
 226
 227         if (__perf_evsel__read(counter, perf_evsel__nr_cpus(counter),
 228                                evsel_list->threads->nr, scale) < 0)
 229                 return -1;
 230
 231         for (i = 0; i < 3; i++)
 232                 update_stats(&ps->res_stats[i], count[i]);
 233
 234         if (verbose) {
 235                 fprintf(output, "%s: %" PRIu64 " %" PRIu64 " %" PRIu64 "\n",
 236                         perf_evsel__name(counter), count[0], count[1], count[2]);
 237         }
 238
 239         /*
 240          * Save the full runtime - to allow normalization during printout:
 241          */
 242         update_shadow_stats(counter, count);
 243
 244         return 0;
 245 }
 246
 247 /*
 248  * Read out the results of a single counter:
 249  * do not aggregate counts across CPUs in system-wide mode
 250  */
 251 static int read_counter(struct perf_evsel *counter)
 252 {
 253         u64 *count;
 254         int cpu;
 255
 256         for (cpu = 0; cpu < perf_evsel__nr_cpus(counter); cpu++) {
 257                 if (__perf_evsel__read_on_cpu(counter, cpu, 0, scale) < 0)
 258                         return -1;
 259
 260                 count = counter->counts->cpu[cpu].values;
 261
 262                 update_shadow_stats(counter, count);
 263         }
 264
 265         return 0;
 266 }
 267
 268 static int run_perf_stat(int argc __maybe_unused, const char **argv)
 269 {
 270         unsigned long long t0, t1;
 271         struct perf_evsel *counter, *first;
 272         int status = 0;
 273         int child_ready_pipe[2], go_pipe[2];
 274         const bool forks = (argc > 0);
 275         char buf;
 276
 277         if (forks && (pipe(child_ready_pipe) < 0 || pipe(go_pipe) < 0)) {
 278                 perror("failed to create pipes");
 279                 return -1;
 280         }
 281
 282         if (forks) {
 283                 if ((child_pid = fork()) < 0)
 284                         perror("failed to fork");
 285
 286                 if (!child_pid) {
 287                         close(child_ready_pipe[0]);
 288                         close(go_pipe[1]);
 289                         fcntl(go_pipe[0], F_SETFD, FD_CLOEXEC);
 290
 291                         /*
 292                          * Do a dummy execvp to get the PLT entry resolved,
 293                          * so we avoid the resolver overhead on the real
 294                          * execvp call.
 295                          */
 296                         execvp("", (char **)argv);
 297
 298                         /*
 299                          * Tell the parent we're ready to go
 300                          */
 301                         close(child_ready_pipe[1]);
 302
 303                         /*
 304                          * Wait until the parent tells us to go.
 305                          */
 306                         if (read(go_pipe[0], &buf, 1) == -1)
 307                                 perror("unable to read pipe");
 308
 309                         execvp(argv[0], (char **)argv);
 310
 311                         perror(argv[0]);
 312                         exit(-1);
 313                 }
 314
 315                 if (perf_target__none(&target))
 316                         evsel_list->threads->map[0] = child_pid;
 317
 318                 /*
 319                  * Wait for the child to be ready to exec.
 320                  */
 321                 close(child_ready_pipe[1]);
 322                 close(go_pipe[0]);
 323                 if (read(child_ready_pipe[0], &buf, 1) == -1)
 324                         perror("unable to read pipe");
 325                 close(child_ready_pipe[0]);
 326         }
 327
 328         if (group)
 329                 perf_evlist__set_leader(evsel_list);
 330
 331         first = perf_evlist__first(evsel_list);
 332
 333         list_for_each_entry(counter, &evsel_list->entries, node) {
 334                 if (create_perf_stat_counter(counter, first) < 0) {
 335                         /*
 336                          * PPC returns ENXIO for HW counters until 2.6.37
 337                          * (behavior changed with commit b0a873e).
 338                          */
 339                         if (errno == EINVAL || errno == ENOSYS ||
 340                             errno == ENOENT || errno == EOPNOTSUPP ||
 341                             errno == ENXIO) {
 342                                 if (verbose)
 343                                         ui__warning("%s event is not supported by the kernel.\n",
 344                                                     perf_evsel__name(counter));
 345                                 counter->supported = false;
 346                                 continue;
 347                         }
 348
 349                         if (errno == EPERM || errno == EACCES) {
 350                                 error("You may not have permission to collect %sstats.\n"
 351                                       "\t Consider tweaking"
 352                                       " /proc/sys/kernel/perf_event_paranoid or running as root.",
 353                                       target.system_wide ? "system-wide " : "");
 354                         } else {
 355                                 error("open_counter returned with %d (%s). "
 356                                       "/bin/dmesg may provide additional information.\n",
 357                                        errno, strerror(errno));
 358                         }
 359                         if (child_pid != -1)
 360                                 kill(child_pid, SIGTERM);
 361
 362                         pr_err("Not all events could be opened.\n");
 363                         return -1;
 364                 }
 365                 counter->supported = true;
 366         }
 367
 368         if (perf_evlist__apply_filters(evsel_list)) {
 369                 error("failed to set filter with %d (%s)\n", errno,
 370                         strerror(errno));
 371                 return -1;
 372         }
 373
 374         /*
 375          * Enable counters and exec the command:
 376          */
 377         t0 = rdclock();
 378
 379         if (forks) {
 380                 close(go_pipe[1]);
 381                 wait(&status);
 382                 if (WIFSIGNALED(status))
 383                         psignal(WTERMSIG(status), argv[0]);
 384         } else {
 385                 while(!done) sleep(1);
 386         }
 387
 388         t1 = rdclock();
 389
 390         update_stats(&walltime_nsecs_stats, t1 - t0);
 391
 392         if (no_aggr) {
 393                 list_for_each_entry(counter, &evsel_list->entries, node) {
 394                         read_counter(counter);
 395                         perf_evsel__close_fd(counter, perf_evsel__nr_cpus(counter), 1);
 396                 }
 397         } else {
 398                 list_for_each_entry(counter, &evsel_list->entries, node) {
 399                         read_counter_aggr(counter);
 400                         perf_evsel__close_fd(counter, perf_evsel__nr_cpus(counter),
 401                                              evsel_list->threads->nr);
 402                 }
 403         }
 404
 405         return WEXITSTATUS(status);
 406 }
 407
 408 static void print_noise_pct(double total, double avg)
 409 {
 410         double pct = rel_stddev_stats(total, avg);
 411
 412         if (csv_output)
 413                 fprintf(output, "%s%.2f%%", csv_sep, pct);
 414         else if (pct)
 415                 fprintf(output, "  ( +-%6.2f%% )", pct);
 416 }
 417
 418 static void print_noise(struct perf_evsel *evsel, double avg)
 419 {
 420         struct perf_stat *ps;
 421
 422         if (run_count == 1)
 423                 return;
 424
 425         ps = evsel->priv;
 426         print_noise_pct(stddev_stats(&ps->res_stats[0]), avg);
 427 }
 428
 429 static void nsec_printout(int cpu, struct perf_evsel *evsel, double avg)
 430 {
 431         double msecs = avg / 1e6;
 432         char cpustr[16] = { '\0', };
 433         const char *fmt = csv_output ? "%s%.6f%s%s" : "%s%18.6f%s%-25s";
 434
 435         if (no_aggr)
 436                 sprintf(cpustr, "CPU%*d%s",
 437                         csv_output ? 0 : -4,
 438                         perf_evsel__cpus(evsel)->map[cpu], csv_sep);
 439
 440         fprintf(output, fmt, cpustr, msecs, csv_sep, perf_evsel__name(evsel));
 441
 442         if (evsel->cgrp)
 443                 fprintf(output, "%s%s", csv_sep, evsel->cgrp->name);
 444
 445         if (csv_output)
 446                 return;
 447
 448         if (perf_evsel__match(evsel, SOFTWARE, SW_TASK_CLOCK))
 449                 fprintf(output, " # %8.3f CPUs utilized          ",
 450                         avg / avg_stats(&walltime_nsecs_stats));
 451         else
 452                 fprintf(output, "                                   ");
 453 }
 454
 455 /* used for get_ratio_color() */
 456 enum grc_type {
 457         GRC_STALLED_CYCLES_FE,
 458         GRC_STALLED_CYCLES_BE,
 459         GRC_CACHE_MISSES,
 460         GRC_MAX_NR
 461 };
 462
 463 static const char *get_ratio_color(enum grc_type type, double ratio)
 464 {
 465         static const double grc_table[GRC_MAX_NR][3] = {
 466                 [GRC_STALLED_CYCLES_FE] = { 50.0, 30.0, 10.0 },
 467                 [GRC_STALLED_CYCLES_BE] = { 75.0, 50.0, 20.0 },
 468                 [GRC_CACHE_MISSES]      = { 20.0, 10.0, 5.0 },
 469         };
 470         const char *color = PERF_COLOR_NORMAL;
 471
 472         if (ratio > grc_table[type][0])
 473                 color = PERF_COLOR_RED;
 474         else if (ratio > grc_table[type][1])
 475                 color = PERF_COLOR_MAGENTA;
 476         else if (ratio > grc_table[type][2])
 477                 color = PERF_COLOR_YELLOW;
 478
 479         return color;
 480 }
 481
 482 static void print_stalled_cycles_frontend(int cpu,
 483                                           struct perf_evsel *evsel
 484                                           __maybe_unused, double avg)
 485 {
 486         double total, ratio = 0.0;
 487         const char *color;
 488
 489         total = avg_stats(&runtime_cycles_stats[cpu]);
 490
 491         if (total)
 492                 ratio = avg / total * 100.0;
 493
 494         color = get_ratio_color(GRC_STALLED_CYCLES_FE, ratio);
 495
 496         fprintf(output, " #  ");
 497         color_fprintf(output, color, "%6.2f%%", ratio);
 498         fprintf(output, " frontend cycles idle   ");
 499 }
 500
 501 static void print_stalled_cycles_backend(int cpu,
 502                                          struct perf_evsel *evsel
 503                                          __maybe_unused, double avg)
 504 {
 505         double total, ratio = 0.0;
 506         const char *color;
 507
 508         total = avg_stats(&runtime_cycles_stats[cpu]);
 509
 510         if (total)
 511                 ratio = avg / total * 100.0;
 512
 513         color = get_ratio_color(GRC_STALLED_CYCLES_BE, ratio);
 514
 515         fprintf(output, " #  ");
 516         color_fprintf(output, color, "%6.2f%%", ratio);
 517         fprintf(output, " backend  cycles idle   ");
 518 }
 519
 520 static void print_branch_misses(int cpu,
 521                                 struct perf_evsel *evsel __maybe_unused,
 522                                 double avg)
 523 {
 524         double total, ratio = 0.0;
 525         const char *color;
 526
 527         total = avg_stats(&runtime_branches_stats[cpu]);
 528
 529         if (total)
 530                 ratio = avg / total * 100.0;
 531
 532         color = get_ratio_color(GRC_CACHE_MISSES, ratio);
 533
 534         fprintf(output, " #  ");
 535         color_fprintf(output, color, "%6.2f%%", ratio);
 536         fprintf(output, " of all branches        ");
 537 }
 538
 539 static void print_l1_dcache_misses(int cpu,
 540                                    struct perf_evsel *evsel __maybe_unused,
 541                                    double avg)
 542 {
 543         double total, ratio = 0.0;
 544         const char *color;
 545
 546         total = avg_stats(&runtime_l1_dcache_stats[cpu]);
 547
 548         if (total)
 549                 ratio = avg / total * 100.0;
 550
 551         color = get_ratio_color(GRC_CACHE_MISSES, ratio);
 552
 553         fprintf(output, " #  ");
 554         color_fprintf(output, color, "%6.2f%%", ratio);
 555         fprintf(output, " of all L1-dcache hits  ");
 556 }
 557
 558 static void print_l1_icache_misses(int cpu,
 559                                    struct perf_evsel *evsel __maybe_unused,
 560                                    double avg)
 561 {
 562         double total, ratio = 0.0;
 563         const char *color;
 564
 565         total = avg_stats(&runtime_l1_icache_stats[cpu]);
 566
 567         if (total)
 568                 ratio = avg / total * 100.0;
 569
 570         color = get_ratio_color(GRC_CACHE_MISSES, ratio);
 571
 572         fprintf(output, " #  ");
 573         color_fprintf(output, color, "%6.2f%%", ratio);
 574         fprintf(output, " of all L1-icache hits  ");
 575 }
 576
 577 static void print_dtlb_cache_misses(int cpu,
 578                                     struct perf_evsel *evsel __maybe_unused,
 579                                     double avg)
 580 {
 581         double total, ratio = 0.0;
 582         const char *color;
 583
 584         total = avg_stats(&runtime_dtlb_cache_stats[cpu]);
 585
 586         if (total)
 587                 ratio = avg / total * 100.0;
 588
 589         color = get_ratio_color(GRC_CACHE_MISSES, ratio);
 590
 591         fprintf(output, " #  ");
 592         color_fprintf(output, color, "%6.2f%%", ratio);
 593         fprintf(output, " of all dTLB cache hits ");
 594 }
 595
 596 static void print_itlb_cache_misses(int cpu,
 597                                     struct perf_evsel *evsel __maybe_unused,
 598                                     double avg)
 599 {
 600         double total, ratio = 0.0;
 601         const char *color;
 602
 603         total = avg_stats(&runtime_itlb_cache_stats[cpu]);
 604
 605         if (total)
 606                 ratio = avg / total * 100.0;
 607
 608         color = get_ratio_color(GRC_CACHE_MISSES, ratio);
 609
 610         fprintf(output, " #  ");
 611         color_fprintf(output, color, "%6.2f%%", ratio);
 612         fprintf(output, " of all iTLB cache hits ");
 613 }
 614
 615 static void print_ll_cache_misses(int cpu,
 616                                   struct perf_evsel *evsel __maybe_unused,
 617                                   double avg)
 618 {
 619         double total, ratio = 0.0;
 620         const char *color;
 621
 622         total = avg_stats(&runtime_ll_cache_stats[cpu]);
 623
 624         if (total)
 625                 ratio = avg / total * 100.0;
 626
 627         color = get_ratio_color(GRC_CACHE_MISSES, ratio);
 628
 629         fprintf(output, " #  ");
 630         color_fprintf(output, color, "%6.2f%%", ratio);
 631         fprintf(output, " of all LL-cache hits   ");
 632 }
 633
 634 static void abs_printout(int cpu, struct perf_evsel *evsel, double avg)
 635 {
 636         double total, ratio = 0.0;
 637         char cpustr[16] = { '\0', };
 638         const char *fmt;
 639
 640         if (csv_output)
 641                 fmt = "%s%.0f%s%s";
 642         else if (big_num)
 643                 fmt = "%s%'18.0f%s%-25s";
 644         else
 645                 fmt = "%s%18.0f%s%-25s";
 646
 647         if (no_aggr)
 648                 sprintf(cpustr, "CPU%*d%s",
 649                         csv_output ? 0 : -4,
 650                         perf_evsel__cpus(evsel)->map[cpu], csv_sep);
 651         else
 652                 cpu = 0;
 653
 654         fprintf(output, fmt, cpustr, avg, csv_sep, perf_evsel__name(evsel));
 655
 656         if (evsel->cgrp)
 657                 fprintf(output, "%s%s", csv_sep, evsel->cgrp->name);
 658
 659         if (csv_output)
 660                 return;
 661
 662         if (perf_evsel__match(evsel, HARDWARE, HW_INSTRUCTIONS)) {
 663                 total = avg_stats(&runtime_cycles_stats[cpu]);
 664
 665                 if (total)
 666                         ratio = avg / total;
 667
 668                 fprintf(output, " #   %5.2f  insns per cycle        ", ratio);
 669
 670                 total = avg_stats(&runtime_stalled_cycles_front_stats[cpu]);
 671                 total = max(total, avg_stats(&runtime_stalled_cycles_back_stats[cpu]));
 672
 673                 if (total && avg) {
 674                         ratio = total / avg;
 675                         fprintf(output, "\n                                             #   %5.2f  stalled cycles per insn", ratio);
 676                 }
 677
 678         } else if (perf_evsel__match(evsel, HARDWARE, HW_BRANCH_MISSES) &&
 679                         runtime_branches_stats[cpu].n != 0) {
 680                 print_branch_misses(cpu, evsel, avg);
 681         } else if (
 682                 evsel->attr.type == PERF_TYPE_HW_CACHE &&
 683                 evsel->attr.config ==  ( PERF_COUNT_HW_CACHE_L1D |
 684                                         ((PERF_COUNT_HW_CACHE_OP_READ) << 8) |
 685                                         ((PERF_COUNT_HW_CACHE_RESULT_MISS) << 16)) &&
 686                         runtime_l1_dcache_stats[cpu].n != 0) {
 687                 print_l1_dcache_misses(cpu, evsel, avg);
 688         } else if (
 689                 evsel->attr.type == PERF_TYPE_HW_CACHE &&
 690                 evsel->attr.config ==  ( PERF_COUNT_HW_CACHE_L1I |
 691                                         ((PERF_COUNT_HW_CACHE_OP_READ) << 8) |
 692                                         ((PERF_COUNT_HW_CACHE_RESULT_MISS) << 16)) &&
 693                         runtime_l1_icache_stats[cpu].n != 0) {
 694                 print_l1_icache_misses(cpu, evsel, avg);
 695         } else if (
 696                 evsel->attr.type == PERF_TYPE_HW_CACHE &&
 697                 evsel->attr.config ==  ( PERF_COUNT_HW_CACHE_DTLB |
 698                                         ((PERF_COUNT_HW_CACHE_OP_READ) << 8) |
 699                                         ((PERF_COUNT_HW_CACHE_RESULT_MISS) << 16)) &&
 700                         runtime_dtlb_cache_stats[cpu].n != 0) {
 701                 print_dtlb_cache_misses(cpu, evsel, avg);
 702         } else if (
 703                 evsel->attr.type == PERF_TYPE_HW_CACHE &&
 704                 evsel->attr.config ==  ( PERF_COUNT_HW_CACHE_ITLB |
 705                                         ((PERF_COUNT_HW_CACHE_OP_READ) << 8) |
 706                                         ((PERF_COUNT_HW_CACHE_RESULT_MISS) << 16)) &&
 707                         runtime_itlb_cache_stats[cpu].n != 0) {
 708                 print_itlb_cache_misses(cpu, evsel, avg);
 709         } else if (
 710                 evsel->attr.type == PERF_TYPE_HW_CACHE &&
 711                 evsel->attr.config ==  ( PERF_COUNT_HW_CACHE_LL |
 712                                         ((PERF_COUNT_HW_CACHE_OP_READ) << 8) |
 713                                         ((PERF_COUNT_HW_CACHE_RESULT_MISS) << 16)) &&
 714                         runtime_ll_cache_stats[cpu].n != 0) {
 715                 print_ll_cache_misses(cpu, evsel, avg);
 716         } else if (perf_evsel__match(evsel, HARDWARE, HW_CACHE_MISSES) &&
 717                         runtime_cacherefs_stats[cpu].n != 0) {
 718                 total = avg_stats(&runtime_cacherefs_stats[cpu]);
 719
 720                 if (total)
 721                         ratio = avg * 100 / total;
 722
 723                 fprintf(output, " # %8.3f %% of all cache refs    ", ratio);
 724
 725         } else if (perf_evsel__match(evsel, HARDWARE, HW_STALLED_CYCLES_FRONTEND)) {
 726                 print_stalled_cycles_frontend(cpu, evsel, avg);
 727         } else if (perf_evsel__match(evsel, HARDWARE, HW_STALLED_CYCLES_BACKEND)) {
 728                 print_stalled_cycles_backend(cpu, evsel, avg);
 729         } else if (perf_evsel__match(evsel, HARDWARE, HW_CPU_CYCLES)) {
 730                 total = avg_stats(&runtime_nsecs_stats[cpu]);
 731
 732                 if (total)
 733                         ratio = 1.0 * avg / total;
 734
 735                 fprintf(output, " # %8.3f GHz                    ", ratio);
 736         } else if (runtime_nsecs_stats[cpu].n != 0) {
 737                 char unit = 'M';
 738
 739                 total = avg_stats(&runtime_nsecs_stats[cpu]);
 740
 741                 if (total)
 742                         ratio = 1000.0 * avg / total;
 743                 if (ratio < 0.001) {
 744                         ratio *= 1000;
 745                         unit = 'K';
 746                 }
 747
 748                 fprintf(output, " # %8.3f %c/sec                  ", ratio, unit);
 749         } else {
 750                 fprintf(output, "                                   ");
 751         }
 752 }
 753
 754 /*
 755  * Print out the results of a single counter:
 756  * aggregated counts in system-wide mode
 757  */
 758 static void print_counter_aggr(struct perf_evsel *counter)
 759 {
 760         struct perf_stat *ps = counter->priv;
 761         double avg = avg_stats(&ps->res_stats[0]);
 762         int scaled = counter->counts->scaled;
 763
 764         if (scaled == -1) {
 765                 fprintf(output, "%*s%s%*s",
 766                         csv_output ? 0 : 18,
 767                         counter->supported ? CNTR_NOT_COUNTED : CNTR_NOT_SUPPORTED,
 768                         csv_sep,
 769                         csv_output ? 0 : -24,
 770                         perf_evsel__name(counter));
 771
 772                 if (counter->cgrp)
 773                         fprintf(output, "%s%s", csv_sep, counter->cgrp->name);
 774
 775                 fputc('\n', output);
 776                 return;
 777         }
 778
 779         if (nsec_counter(counter))
 780                 nsec_printout(-1, counter, avg);
 781         else
 782                 abs_printout(-1, counter, avg);
 783
 784         print_noise(counter, avg);
 785
 786         if (csv_output) {
 787                 fputc('\n', output);
 788                 return;
 789         }
 790
 791         if (scaled) {
 792                 double avg_enabled, avg_running;
 793
 794                 avg_enabled = avg_stats(&ps->res_stats[1]);
 795                 avg_running = avg_stats(&ps->res_stats[2]);
 796
 797                 fprintf(output, " [%5.2f%%]", 100 * avg_running / avg_enabled);
 798         }
 799         fprintf(output, "\n");
 800 }
 801
 802 /*
 803  * Print out the results of a single counter:
 804  * does not use aggregated count in system-wide
 805  */
 806 static void print_counter(struct perf_evsel *counter)
 807 {
 808         u64 ena, run, val;
 809         int cpu;
 810
 811         for (cpu = 0; cpu < perf_evsel__nr_cpus(counter); cpu++) {
 812                 val = counter->counts->cpu[cpu].val;
 813                 ena = counter->counts->cpu[cpu].ena;
 814                 run = counter->counts->cpu[cpu].run;
 815                 if (run == 0 || ena == 0) {
 816                         fprintf(output, "CPU%*d%s%*s%s%*s",
 817                                 csv_output ? 0 : -4,
 818                                 perf_evsel__cpus(counter)->map[cpu], csv_sep,
 819                                 csv_output ? 0 : 18,
 820                                 counter->supported ? CNTR_NOT_COUNTED : CNTR_NOT_SUPPORTED,
 821                                 csv_sep,
 822                                 csv_output ? 0 : -24,
 823                                 perf_evsel__name(counter));
 824
 825                         if (counter->cgrp)
 826                                 fprintf(output, "%s%s",
 827                                         csv_sep, counter->cgrp->name);
 828
 829                         fputc('\n', output);
 830                         continue;
 831                 }
 832
 833                 if (nsec_counter(counter))
 834                         nsec_printout(cpu, counter, val);
 835                 else
 836                         abs_printout(cpu, counter, val);
 837
 838                 if (!csv_output) {
 839                         print_noise(counter, 1.0);
 840
 841                         if (run != ena)
 842                                 fprintf(output, "  (%.2f%%)",
 843                                         100.0 * run / ena);
 844                 }
 845                 fputc('\n', output);
 846         }
 847 }
 848
 849 static void print_stat(int argc, const char **argv)
 850 {
 851         struct perf_evsel *counter;
 852         int i;
 853
 854         fflush(stdout);
 855
 856         if (!csv_output) {
 857                 fprintf(output, "\n");
 858                 fprintf(output, " Performance counter stats for ");
 859                 if (!perf_target__has_task(&target)) {
 860                         fprintf(output, "\'%s", argv[0]);
 861                         for (i = 1; i < argc; i++)
 862                                 fprintf(output, " %s", argv[i]);
 863                 } else if (target.pid)
 864                         fprintf(output, "process id \'%s", target.pid);
 865                 else
 866                         fprintf(output, "thread id \'%s", target.tid);
 867
 868                 fprintf(output, "\'");
 869                 if (run_count > 1)
 870                         fprintf(output, " (%d runs)", run_count);
 871                 fprintf(output, ":\n\n");
 872         }
 873
 874         if (no_aggr) {
 875                 list_for_each_entry(counter, &evsel_list->entries, node)
 876                         print_counter(counter);
 877         } else {
 878                 list_for_each_entry(counter, &evsel_list->entries, node)
 879                         print_counter_aggr(counter);
 880         }
 881
 882         if (!csv_output) {
 883                 if (!null_run)
 884                         fprintf(output, "\n");
 885                 fprintf(output, " %17.9f seconds time elapsed",
 886                                 avg_stats(&walltime_nsecs_stats)/1e9);
 887                 if (run_count > 1) {
 888                         fprintf(output, "                                        ");
 889                         print_noise_pct(stddev_stats(&walltime_nsecs_stats),
 890                                         avg_stats(&walltime_nsecs_stats));
 891                 }
 892                 fprintf(output, "\n\n");
 893         }
 894 }
 895
 896 static volatile int signr = -1;
 897
 898 static void skip_signal(int signo)
 899 {
 900         if(child_pid == -1)
 901                 done = 1;
 902
 903         signr = signo;
 904 }
 905
 906 static void sig_atexit(void)
 907 {
 908         if (child_pid != -1)
 909                 kill(child_pid, SIGTERM);
 910
 911         if (signr == -1)
 912                 return;
 913
 914         signal(signr, SIG_DFL);
 915         kill(getpid(), signr);
 916 }
 917
 918 static int stat__set_big_num(const struct option *opt __maybe_unused,
 919                              const char *s __maybe_unused, int unset)
 920 {
 921         big_num_opt = unset ? 0 : 1;
 922         return 0;
 923 }
 924
 925 /*
 926  * Add default attributes, if there were no attributes specified or
 927  * if -d/--detailed, -d -d or -d -d -d is used:
 928  */
 929 static int add_default_attributes(void)
 930 {
 931         struct perf_event_attr default_attrs[] = {
 932
 933   { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_TASK_CLOCK              },
 934   { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_CONTEXT_SWITCHES        },
 935   { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_CPU_MIGRATIONS          },
 936   { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_PAGE_FAULTS             },
 937
 938   { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_CPU_CYCLES              },
 939   { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_STALLED_CYCLES_FRONTEND },
 940   { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_STALLED_CYCLES_BACKEND  },
 941   { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_INSTRUCTIONS            },
 942   { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_BRANCH_INSTRUCTIONS     },
 943   { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_BRANCH_MISSES           },
 944
 945 };
 946
 947 /*
 948  * Detailed stats (-d), covering the L1 and last level data caches:
 949  */
 950         struct perf_event_attr detailed_attrs[] = {
 951
 952   { .type = PERF_TYPE_HW_CACHE,
 953     .config =
 954          PERF_COUNT_HW_CACHE_L1D                <<  0  |
 955         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
 956         (PERF_COUNT_HW_CACHE_RESULT_ACCESS      << 16)                          },
 957
 958   { .type = PERF_TYPE_HW_CACHE,
 959     .config =
 960          PERF_COUNT_HW_CACHE_L1D                <<  0  |
 961         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
 962         (PERF_COUNT_HW_CACHE_RESULT_MISS        << 16)                          },
 963
 964   { .type = PERF_TYPE_HW_CACHE,
 965     .config =
 966          PERF_COUNT_HW_CACHE_LL                 <<  0  |
 967         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
 968         (PERF_COUNT_HW_CACHE_RESULT_ACCESS      << 16)                          },
 969
 970   { .type = PERF_TYPE_HW_CACHE,
 971     .config =
 972          PERF_COUNT_HW_CACHE_LL                 <<  0  |
 973         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
 974         (PERF_COUNT_HW_CACHE_RESULT_MISS        << 16)                          },
 975 };
 976
 977 /*
 978  * Very detailed stats (-d -d), covering the instruction cache and the TLB caches:
 979  */
 980         struct perf_event_attr very_detailed_attrs[] = {
 981
 982   { .type = PERF_TYPE_HW_CACHE,
 983     .config =
 984          PERF_COUNT_HW_CACHE_L1I                <<  0  |
 985         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
 986         (PERF_COUNT_HW_CACHE_RESULT_ACCESS      << 16)                          },
 987
 988   { .type = PERF_TYPE_HW_CACHE,
 989     .config =
 990          PERF_COUNT_HW_CACHE_L1I                <<  0  |
 991         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
 992         (PERF_COUNT_HW_CACHE_RESULT_MISS        << 16)                          },
 993
 994   { .type = PERF_TYPE_HW_CACHE,
 995     .config =
 996          PERF_COUNT_HW_CACHE_DTLB               <<  0  |
 997         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
 998         (PERF_COUNT_HW_CACHE_RESULT_ACCESS      << 16)                          },
 999
1000   { .type = PERF_TYPE_HW_CACHE,
1001     .config =
1002          PERF_COUNT_HW_CACHE_DTLB               <<  0  |
1003         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
1004         (PERF_COUNT_HW_CACHE_RESULT_MISS        << 16)                          },
1005
1006   { .type = PERF_TYPE_HW_CACHE,
1007     .config =
1008          PERF_COUNT_HW_CACHE_ITLB               <<  0  |
1009         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
1010         (PERF_COUNT_HW_CACHE_RESULT_ACCESS      << 16)                          },
1011
1012   { .type = PERF_TYPE_HW_CACHE,
1013     .config =
1014          PERF_COUNT_HW_CACHE_ITLB               <<  0  |
1015         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
1016         (PERF_COUNT_HW_CACHE_RESULT_MISS        << 16)                          },
1017
1018 };
1019
1020 /*
1021  * Very, very detailed stats (-d -d -d), adding prefetch events:
1022  */
1023         struct perf_event_attr very_very_detailed_attrs[] = {
1024
1025   { .type = PERF_TYPE_HW_CACHE,
1026     .config =
1027          PERF_COUNT_HW_CACHE_L1D                <<  0  |
1028         (PERF_COUNT_HW_CACHE_OP_PREFETCH        <<  8) |
1029         (PERF_COUNT_HW_CACHE_RESULT_ACCESS      << 16)                          },
1030
1031   { .type = PERF_TYPE_HW_CACHE,
1032     .config =
1033          PERF_COUNT_HW_CACHE_L1D                <<  0  |
1034         (PERF_COUNT_HW_CACHE_OP_PREFETCH        <<  8) |
1035         (PERF_COUNT_HW_CACHE_RESULT_MISS        << 16)                          },
1036 };
1037
1038         /* Set attrs if no event is selected and !null_run: */
1039         if (null_run)
1040                 return 0;
1041
1042         if (!evsel_list->nr_entries) {
1043                 if (perf_evlist__add_default_attrs(evsel_list, default_attrs) < 0)
1044                         return -1;
1045         }
1046
1047         /* Detailed events get appended to the event list: */
1048
1049         if (detailed_run <  1)
1050                 return 0;
1051
1052         /* Append detailed run extra attributes: */
1053         if (perf_evlist__add_default_attrs(evsel_list, detailed_attrs) < 0)
1054                 return -1;
1055
1056         if (detailed_run < 2)
1057                 return 0;
1058
1059         /* Append very detailed run extra attributes: */
1060         if (perf_evlist__add_default_attrs(evsel_list, very_detailed_attrs) < 0)
1061                 return -1;
1062
1063         if (detailed_run < 3)
1064                 return 0;
1065
1066         /* Append very, very detailed run extra attributes: */
1067         return perf_evlist__add_default_attrs(evsel_list, very_very_detailed_attrs);
1068 }
1069
1070 int cmd_stat(int argc, const char **argv, const char *prefix __maybe_unused)
1071 {
1072         bool append_file = false,
1073              sync_run = false;
1074         int output_fd = 0;
1075         const char *output_name = NULL;
1076         const struct option options[] = {
1077         OPT_CALLBACK('e', "event", &evsel_list, "event",
1078                      "event selector. use 'perf list' to list available events",
1079                      parse_events_option),
1080         OPT_CALLBACK(0, "filter", &evsel_list, "filter",
1081                      "event filter", parse_filter),
1082         OPT_BOOLEAN('i', "no-inherit", &no_inherit,
1083                     "child tasks do not inherit counters"),
1084         OPT_STRING('p', "pid", &target.pid, "pid",
1085                    "stat events on existing process id"),
1086         OPT_STRING('t', "tid", &target.tid, "tid",
1087                    "stat events on existing thread id"),
1088         OPT_BOOLEAN('a', "all-cpus", &target.system_wide,
1089                     "system-wide collection from all CPUs"),
1090         OPT_BOOLEAN('g', "group", &group,
1091                     "put the counters into a counter group"),
1092         OPT_BOOLEAN('c', "scale", &scale, "scale/normalize counters"),
1093         OPT_INCR('v', "verbose", &verbose,
1094                     "be more verbose (show counter open errors, etc)"),
1095         OPT_INTEGER('r', "repeat", &run_count,
1096                     "repeat command and print average + stddev (max: 100)"),
1097         OPT_BOOLEAN('n', "null", &null_run,
1098                     "null run - dont start any counters"),
1099         OPT_INCR('d', "detailed", &detailed_run,
1100                     "detailed run - start a lot of events"),
1101         OPT_BOOLEAN('S', "sync", &sync_run,
1102                     "call sync() before starting a run"),
1103         OPT_CALLBACK_NOOPT('B', "big-num", NULL, NULL,
1104                            "print large numbers with thousands\' separators",
1105                            stat__set_big_num),
1106         OPT_STRING('C', "cpu", &target.cpu_list, "cpu",
1107                     "list of cpus to monitor in system-wide"),
1108         OPT_BOOLEAN('A', "no-aggr", &no_aggr, "disable CPU count aggregation"),
1109         OPT_STRING('x', "field-separator", &csv_sep, "separator",
1110                    "print counts with custom separator"),
1111         OPT_CALLBACK('G', "cgroup", &evsel_list, "name",
1112                      "monitor event in cgroup name only", parse_cgroups),
1113         OPT_STRING('o', "output", &output_name, "file", "output file name"),
1114         OPT_BOOLEAN(0, "append", &append_file, "append to the output file"),
1115         OPT_INTEGER(0, "log-fd", &output_fd,
1116                     "log output to fd, instead of stderr"),
1117         OPT_END()
1118         };
1119         const char * const stat_usage[] = {
1120                 "perf stat [<options>] [<command>]",
1121                 NULL
1122         };
1123         struct perf_evsel *pos;
1124         int status = -ENOMEM, run_idx;
1125         const char *mode;
1126
1127         setlocale(LC_ALL, "");
1128
1129         evsel_list = perf_evlist__new(NULL, NULL);
1130         if (evsel_list == NULL)
1131                 return -ENOMEM;
1132
1133         argc = parse_options(argc, argv, options, stat_usage,
1134                 PARSE_OPT_STOP_AT_NON_OPTION);
1135
1136         output = stderr;
1137         if (output_name && strcmp(output_name, "-"))
1138                 output = NULL;
1139
1140         if (output_name && output_fd) {
1141                 fprintf(stderr, "cannot use both --output and --log-fd\n");
1142                 usage_with_options(stat_usage, options);
1143         }
1144
1145         if (output_fd < 0) {
1146                 fprintf(stderr, "argument to --log-fd must be a > 0\n");
1147                 usage_with_options(stat_usage, options);
1148         }
1149
1150         if (!output) {
1151                 struct timespec tm;
1152                 mode = append_file ? "a" : "w";
1153
1154                 output = fopen(output_name, mode);
1155                 if (!output) {
1156                         perror("failed to create output file");
1157                         return -1;
1158                 }
1159                 clock_gettime(CLOCK_REALTIME, &tm);
1160                 fprintf(output, "# started on %s\n", ctime(&tm.tv_sec));
1161         } else if (output_fd > 0) {
1162                 mode = append_file ? "a" : "w";
1163                 output = fdopen(output_fd, mode);
1164                 if (!output) {
1165                         perror("Failed opening logfd");
1166                         return -errno;
1167                 }
1168         }
1169
1170         if (csv_sep) {
1171                 csv_output = true;
1172                 if (!strcmp(csv_sep, "\\t"))
1173                         csv_sep = "\t";
1174         } else
1175                 csv_sep = DEFAULT_SEPARATOR;
1176
1177         /*
1178          * let the spreadsheet do the pretty-printing
1179          */
1180         if (csv_output) {
1181                 /* User explicitly passed -B? */
1182                 if (big_num_opt == 1) {
1183                         fprintf(stderr, "-B option not supported with -x\n");
1184                         usage_with_options(stat_usage, options);
1185                 } else /* Nope, so disable big number formatting */
1186                         big_num = false;
1187         } else if (big_num_opt == 0) /* User passed --no-big-num */
1188                 big_num = false;
1189
1190         if (!argc && !perf_target__has_task(&target))
1191                 usage_with_options(stat_usage, options);
1192         if (run_count <= 0)
1193                 usage_with_options(stat_usage, options);
1194
1195         /* no_aggr, cgroup are for system-wide only */
1196         if ((no_aggr || nr_cgroups) && !perf_target__has_cpu(&target)) {
1197                 fprintf(stderr, "both cgroup and no-aggregation "
1198                         "modes only available in system-wide mode\n");
1199
1200                 usage_with_options(stat_usage, options);
1201         }
1202
1203         if (add_default_attributes())
1204                 goto out;
1205
1206         perf_target__validate(&target);
1207
1208         if (perf_evlist__create_maps(evsel_list, &target) < 0) {
1209                 if (perf_target__has_task(&target))
1210                         pr_err("Problems finding threads of monitor\n");
1211                 if (perf_target__has_cpu(&target))
1212                         perror("failed to parse CPUs map");
1213
1214                 usage_with_options(stat_usage, options);
1215                 return -1;
1216         }
1217
1218         list_for_each_entry(pos, &evsel_list->entries, node) {
1219                 if (perf_evsel__alloc_stat_priv(pos) < 0 ||
1220                     perf_evsel__alloc_counts(pos, perf_evsel__nr_cpus(pos)) < 0)
1221                         goto out_free_fd;
1222         }
1223
1224         /*
1225          * We dont want to block the signals - that would cause
1226          * child tasks to inherit that and Ctrl-C would not work.
1227          * What we want is for Ctrl-C to work in the exec()-ed
1228          * task, but being ignored by perf stat itself:
1229          */
1230         atexit(sig_atexit);
1231         signal(SIGINT,  skip_signal);
1232         signal(SIGALRM, skip_signal);
1233         signal(SIGABRT, skip_signal);
1234
1235         status = 0;
1236         for (run_idx = 0; run_idx < run_count; run_idx++) {
1237                 if (run_count != 1 && verbose)
1238                         fprintf(output, "[ perf stat: executing run #%d ... ]\n",
1239                                 run_idx + 1);
1240
1241                 if (sync_run)
1242                         sync();
1243
1244                 status = run_perf_stat(argc, argv);
1245         }
1246
1247         if (status != -1)
1248                 print_stat(argc, argv);
1249 out_free_fd:
1250         list_for_each_entry(pos, &evsel_list->entries, node)
1251                 perf_evsel__free_stat_priv(pos);
1252         perf_evlist__delete_maps(evsel_list);
1253 out:
1254         perf_evlist__delete(evsel_list);
1255         return status;
1256 }