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 <stdlib.h>
  61 #include <sys/prctl.h>
  62 #include <locale.h>
  63
  64 #define DEFAULT_SEPARATOR       " "
  65 #define CNTR_NOT_SUPPORTED      "<not supported>"
  66 #define CNTR_NOT_COUNTED        "<not counted>"
  67
  68 static struct perf_evlist       *evsel_list;
  69
  70 static struct perf_target       target = {
  71         .uid    = UINT_MAX,
  72 };
  73
  74 static int                      run_count                       =  1;
  75 static bool                     no_inherit                      = false;
  76 static bool                     scale                           =  true;
  77 static bool                     no_aggr                         = false;
  78 static pid_t                    child_pid                       = -1;
  79 static bool                     null_run                        =  false;
  80 static int                      detailed_run                    =  0;
  81 static bool                     big_num                         =  true;
  82 static int                      big_num_opt                     =  -1;
  83 static const char               *csv_sep                        = NULL;
  84 static bool                     csv_output                      = false;
  85 static bool                     group                           = false;
  86 static FILE                     *output                         = NULL;
  87 static const char               *pre_cmd                        = NULL;
  88 static const char               *post_cmd                       = NULL;
  89 static bool                     sync_run                        = false;
  90
  91 static volatile int done = 0;
  92
  93 struct perf_stat {
  94         struct stats      res_stats[3];
  95 };
  96
  97 static int perf_evsel__alloc_stat_priv(struct perf_evsel *evsel)
  98 {
  99         evsel->priv = zalloc(sizeof(struct perf_stat));
 100         return evsel->priv == NULL ? -ENOMEM : 0;
 101 }
 102
 103 static void perf_evsel__free_stat_priv(struct perf_evsel *evsel)
 104 {
 105         free(evsel->priv);
 106         evsel->priv = NULL;
 107 }
 108
 109 static inline struct cpu_map *perf_evsel__cpus(struct perf_evsel *evsel)
 110 {
 111         return (evsel->cpus && !target.cpu_list) ? evsel->cpus : evsel_list->cpus;
 112 }
 113
 114 static inline int perf_evsel__nr_cpus(struct perf_evsel *evsel)
 115 {
 116         return perf_evsel__cpus(evsel)->nr;
 117 }
 118
 119 static struct stats runtime_nsecs_stats[MAX_NR_CPUS];
 120 static struct stats runtime_cycles_stats[MAX_NR_CPUS];
 121 static struct stats runtime_stalled_cycles_front_stats[MAX_NR_CPUS];
 122 static struct stats runtime_stalled_cycles_back_stats[MAX_NR_CPUS];
 123 static struct stats runtime_branches_stats[MAX_NR_CPUS];
 124 static struct stats runtime_cacherefs_stats[MAX_NR_CPUS];
 125 static struct stats runtime_l1_dcache_stats[MAX_NR_CPUS];
 126 static struct stats runtime_l1_icache_stats[MAX_NR_CPUS];
 127 static struct stats runtime_ll_cache_stats[MAX_NR_CPUS];
 128 static struct stats runtime_itlb_cache_stats[MAX_NR_CPUS];
 129 static struct stats runtime_dtlb_cache_stats[MAX_NR_CPUS];
 130 static struct stats walltime_nsecs_stats;
 131
 132 static int create_perf_stat_counter(struct perf_evsel *evsel)
 133 {
 134         struct perf_event_attr *attr = &evsel->attr;
 135         bool exclude_guest_missing = false;
 136         int ret;
 137
 138         if (scale)
 139                 attr->read_format = PERF_FORMAT_TOTAL_TIME_ENABLED |
 140                                     PERF_FORMAT_TOTAL_TIME_RUNNING;
 141
 142         attr->inherit = !no_inherit;
 143
 144 retry:
 145         if (exclude_guest_missing)
 146                 evsel->attr.exclude_guest = evsel->attr.exclude_host = 0;
 147
 148         if (perf_target__has_cpu(&target)) {
 149                 ret = perf_evsel__open_per_cpu(evsel, perf_evsel__cpus(evsel));
 150                 if (ret)
 151                         goto check_ret;
 152                 return 0;
 153         }
 154
 155         if (!perf_target__has_task(&target) &&
 156             !perf_evsel__is_group_member(evsel)) {
 157                 attr->disabled = 1;
 158                 attr->enable_on_exec = 1;
 159         }
 160
 161         ret = perf_evsel__open_per_thread(evsel, evsel_list->threads);
 162         if (!ret)
 163                 return 0;
 164         /* fall through */
 165 check_ret:
 166         if (ret && errno == EINVAL) {
 167                 if (!exclude_guest_missing &&
 168                     (evsel->attr.exclude_guest || evsel->attr.exclude_host)) {
 169                         pr_debug("Old kernel, cannot exclude "
 170                                  "guest or host samples.\n");
 171                         exclude_guest_missing = true;
 172                         goto retry;
 173                 }
 174         }
 175         return ret;
 176 }
 177
 178 /*
 179  * Does the counter have nsecs as a unit?
 180  */
 181 static inline int nsec_counter(struct perf_evsel *evsel)
 182 {
 183         if (perf_evsel__match(evsel, SOFTWARE, SW_CPU_CLOCK) ||
 184             perf_evsel__match(evsel, SOFTWARE, SW_TASK_CLOCK))
 185                 return 1;
 186
 187         return 0;
 188 }
 189
 190 /*
 191  * Update various tracking values we maintain to print
 192  * more semantic information such as miss/hit ratios,
 193  * instruction rates, etc:
 194  */
 195 static void update_shadow_stats(struct perf_evsel *counter, u64 *count)
 196 {
 197         if (perf_evsel__match(counter, SOFTWARE, SW_TASK_CLOCK))
 198                 update_stats(&runtime_nsecs_stats[0], count[0]);
 199         else if (perf_evsel__match(counter, HARDWARE, HW_CPU_CYCLES))
 200                 update_stats(&runtime_cycles_stats[0], count[0]);
 201         else if (perf_evsel__match(counter, HARDWARE, HW_STALLED_CYCLES_FRONTEND))
 202                 update_stats(&runtime_stalled_cycles_front_stats[0], count[0]);
 203         else if (perf_evsel__match(counter, HARDWARE, HW_STALLED_CYCLES_BACKEND))
 204                 update_stats(&runtime_stalled_cycles_back_stats[0], count[0]);
 205         else if (perf_evsel__match(counter, HARDWARE, HW_BRANCH_INSTRUCTIONS))
 206                 update_stats(&runtime_branches_stats[0], count[0]);
 207         else if (perf_evsel__match(counter, HARDWARE, HW_CACHE_REFERENCES))
 208                 update_stats(&runtime_cacherefs_stats[0], count[0]);
 209         else if (perf_evsel__match(counter, HW_CACHE, HW_CACHE_L1D))
 210                 update_stats(&runtime_l1_dcache_stats[0], count[0]);
 211         else if (perf_evsel__match(counter, HW_CACHE, HW_CACHE_L1I))
 212                 update_stats(&runtime_l1_icache_stats[0], count[0]);
 213         else if (perf_evsel__match(counter, HW_CACHE, HW_CACHE_LL))
 214                 update_stats(&runtime_ll_cache_stats[0], count[0]);
 215         else if (perf_evsel__match(counter, HW_CACHE, HW_CACHE_DTLB))
 216                 update_stats(&runtime_dtlb_cache_stats[0], count[0]);
 217         else if (perf_evsel__match(counter, HW_CACHE, HW_CACHE_ITLB))
 218                 update_stats(&runtime_itlb_cache_stats[0], count[0]);
 219 }
 220
 221 /*
 222  * Read out the results of a single counter:
 223  * aggregate counts across CPUs in system-wide mode
 224  */
 225 static int read_counter_aggr(struct perf_evsel *counter)
 226 {
 227         struct perf_stat *ps = counter->priv;
 228         u64 *count = counter->counts->aggr.values;
 229         int i;
 230
 231         if (__perf_evsel__read(counter, perf_evsel__nr_cpus(counter),
 232                                evsel_list->threads->nr, scale) < 0)
 233                 return -1;
 234
 235         for (i = 0; i < 3; i++)
 236                 update_stats(&ps->res_stats[i], count[i]);
 237
 238         if (verbose) {
 239                 fprintf(output, "%s: %" PRIu64 " %" PRIu64 " %" PRIu64 "\n",
 240                         perf_evsel__name(counter), count[0], count[1], count[2]);
 241         }
 242
 243         /*
 244          * Save the full runtime - to allow normalization during printout:
 245          */
 246         update_shadow_stats(counter, count);
 247
 248         return 0;
 249 }
 250
 251 /*
 252  * Read out the results of a single counter:
 253  * do not aggregate counts across CPUs in system-wide mode
 254  */
 255 static int read_counter(struct perf_evsel *counter)
 256 {
 257         u64 *count;
 258         int cpu;
 259
 260         for (cpu = 0; cpu < perf_evsel__nr_cpus(counter); cpu++) {
 261                 if (__perf_evsel__read_on_cpu(counter, cpu, 0, scale) < 0)
 262                         return -1;
 263
 264                 count = counter->counts->cpu[cpu].values;
 265
 266                 update_shadow_stats(counter, count);
 267         }
 268
 269         return 0;
 270 }
 271
 272 static int __run_perf_stat(int argc __maybe_unused, const char **argv)
 273 {
 274         unsigned long long t0, t1;
 275         struct perf_evsel *counter;
 276         int status = 0;
 277         int child_ready_pipe[2], go_pipe[2];
 278         const bool forks = (argc > 0);
 279         char buf;
 280
 281         if (forks && (pipe(child_ready_pipe) < 0 || pipe(go_pipe) < 0)) {
 282                 perror("failed to create pipes");
 283                 return -1;
 284         }
 285
 286         if (forks) {
 287                 if ((child_pid = fork()) < 0)
 288                         perror("failed to fork");
 289
 290                 if (!child_pid) {
 291                         close(child_ready_pipe[0]);
 292                         close(go_pipe[1]);
 293                         fcntl(go_pipe[0], F_SETFD, FD_CLOEXEC);
 294
 295                         /*
 296                          * Do a dummy execvp to get the PLT entry resolved,
 297                          * so we avoid the resolver overhead on the real
 298                          * execvp call.
 299                          */
 300                         execvp("", (char **)argv);
 301
 302                         /*
 303                          * Tell the parent we're ready to go
 304                          */
 305                         close(child_ready_pipe[1]);
 306
 307                         /*
 308                          * Wait until the parent tells us to go.
 309                          */
 310                         if (read(go_pipe[0], &buf, 1) == -1)
 311                                 perror("unable to read pipe");
 312
 313                         execvp(argv[0], (char **)argv);
 314
 315                         perror(argv[0]);
 316                         exit(-1);
 317                 }
 318
 319                 if (perf_target__none(&target))
 320                         evsel_list->threads->map[0] = child_pid;
 321
 322                 /*
 323                  * Wait for the child to be ready to exec.
 324                  */
 325                 close(child_ready_pipe[1]);
 326                 close(go_pipe[0]);
 327                 if (read(child_ready_pipe[0], &buf, 1) == -1)
 328                         perror("unable to read pipe");
 329                 close(child_ready_pipe[0]);
 330         }
 331
 332         if (group)
 333                 perf_evlist__set_leader(evsel_list);
 334
 335         list_for_each_entry(counter, &evsel_list->entries, node) {
 336                 if (create_perf_stat_counter(counter) < 0) {
 337                         /*
 338                          * PPC returns ENXIO for HW counters until 2.6.37
 339                          * (behavior changed with commit b0a873e).
 340                          */
 341                         if (errno == EINVAL || errno == ENOSYS ||
 342                             errno == ENOENT || errno == EOPNOTSUPP ||
 343                             errno == ENXIO) {
 344                                 if (verbose)
 345                                         ui__warning("%s event is not supported by the kernel.\n",
 346                                                     perf_evsel__name(counter));
 347                                 counter->supported = false;
 348                                 continue;
 349                         }
 350
 351                         if (errno == EPERM || errno == EACCES) {
 352                                 error("You may not have permission to collect %sstats.\n"
 353                                       "\t Consider tweaking"
 354                                       " /proc/sys/kernel/perf_event_paranoid or running as root.",
 355                                       target.system_wide ? "system-wide " : "");
 356                         } else {
 357                                 error("open_counter returned with %d (%s). "
 358                                       "/bin/dmesg may provide additional information.\n",
 359                                        errno, strerror(errno));
 360                         }
 361                         if (child_pid != -1)
 362                                 kill(child_pid, SIGTERM);
 363
 364                         pr_err("Not all events could be opened.\n");
 365                         return -1;
 366                 }
 367                 counter->supported = true;
 368         }
 369
 370         if (perf_evlist__apply_filters(evsel_list)) {
 371                 error("failed to set filter with %d (%s)\n", errno,
 372                         strerror(errno));
 373                 return -1;
 374         }
 375
 376         /*
 377          * Enable counters and exec the command:
 378          */
 379         t0 = rdclock();
 380
 381         if (forks) {
 382                 close(go_pipe[1]);
 383                 wait(&status);
 384                 if (WIFSIGNALED(status))
 385                         psignal(WTERMSIG(status), argv[0]);
 386         } else {
 387                 while(!done) sleep(1);
 388         }
 389
 390         t1 = rdclock();
 391
 392         update_stats(&walltime_nsecs_stats, t1 - t0);
 393
 394         if (no_aggr) {
 395                 list_for_each_entry(counter, &evsel_list->entries, node) {
 396                         read_counter(counter);
 397                         perf_evsel__close_fd(counter, perf_evsel__nr_cpus(counter), 1);
 398                 }
 399         } else {
 400                 list_for_each_entry(counter, &evsel_list->entries, node) {
 401                         read_counter_aggr(counter);
 402                         perf_evsel__close_fd(counter, perf_evsel__nr_cpus(counter),
 403                                              evsel_list->threads->nr);
 404                 }
 405         }
 406
 407         return WEXITSTATUS(status);
 408 }
 409
 410 static int run_perf_stat(int argc __maybe_unused, const char **argv)
 411 {
 412         int ret;
 413
 414         if (pre_cmd) {
 415                 ret = system(pre_cmd);
 416                 if (ret)
 417                         return ret;
 418         }
 419
 420         if (sync_run)
 421                 sync();
 422
 423         ret = __run_perf_stat(argc, argv);
 424         if (ret)
 425                 return ret;
 426
 427         if (post_cmd) {
 428                 ret = system(post_cmd);
 429                 if (ret)
 430                         return ret;
 431         }
 432
 433         return ret;
 434 }
 435
 436 static void print_noise_pct(double total, double avg)
 437 {
 438         double pct = rel_stddev_stats(total, avg);
 439
 440         if (csv_output)
 441                 fprintf(output, "%s%.2f%%", csv_sep, pct);
 442         else if (pct)
 443                 fprintf(output, "  ( +-%6.2f%% )", pct);
 444 }
 445
 446 static void print_noise(struct perf_evsel *evsel, double avg)
 447 {
 448         struct perf_stat *ps;
 449
 450         if (run_count == 1)
 451                 return;
 452
 453         ps = evsel->priv;
 454         print_noise_pct(stddev_stats(&ps->res_stats[0]), avg);
 455 }
 456
 457 static void nsec_printout(int cpu, struct perf_evsel *evsel, double avg)
 458 {
 459         double msecs = avg / 1e6;
 460         char cpustr[16] = { '\0', };
 461         const char *fmt = csv_output ? "%s%.6f%s%s" : "%s%18.6f%s%-25s";
 462
 463         if (no_aggr)
 464                 sprintf(cpustr, "CPU%*d%s",
 465                         csv_output ? 0 : -4,
 466                         perf_evsel__cpus(evsel)->map[cpu], csv_sep);
 467
 468         fprintf(output, fmt, cpustr, msecs, csv_sep, perf_evsel__name(evsel));
 469
 470         if (evsel->cgrp)
 471                 fprintf(output, "%s%s", csv_sep, evsel->cgrp->name);
 472
 473         if (csv_output)
 474                 return;
 475
 476         if (perf_evsel__match(evsel, SOFTWARE, SW_TASK_CLOCK))
 477                 fprintf(output, " # %8.3f CPUs utilized          ",
 478                         avg / avg_stats(&walltime_nsecs_stats));
 479         else
 480                 fprintf(output, "                                   ");
 481 }
 482
 483 /* used for get_ratio_color() */
 484 enum grc_type {
 485         GRC_STALLED_CYCLES_FE,
 486         GRC_STALLED_CYCLES_BE,
 487         GRC_CACHE_MISSES,
 488         GRC_MAX_NR
 489 };
 490
 491 static const char *get_ratio_color(enum grc_type type, double ratio)
 492 {
 493         static const double grc_table[GRC_MAX_NR][3] = {
 494                 [GRC_STALLED_CYCLES_FE] = { 50.0, 30.0, 10.0 },
 495                 [GRC_STALLED_CYCLES_BE] = { 75.0, 50.0, 20.0 },
 496                 [GRC_CACHE_MISSES]      = { 20.0, 10.0, 5.0 },
 497         };
 498         const char *color = PERF_COLOR_NORMAL;
 499
 500         if (ratio > grc_table[type][0])
 501                 color = PERF_COLOR_RED;
 502         else if (ratio > grc_table[type][1])
 503                 color = PERF_COLOR_MAGENTA;
 504         else if (ratio > grc_table[type][2])
 505                 color = PERF_COLOR_YELLOW;
 506
 507         return color;
 508 }
 509
 510 static void print_stalled_cycles_frontend(int cpu,
 511                                           struct perf_evsel *evsel
 512                                           __maybe_unused, double avg)
 513 {
 514         double total, ratio = 0.0;
 515         const char *color;
 516
 517         total = avg_stats(&runtime_cycles_stats[cpu]);
 518
 519         if (total)
 520                 ratio = avg / total * 100.0;
 521
 522         color = get_ratio_color(GRC_STALLED_CYCLES_FE, ratio);
 523
 524         fprintf(output, " #  ");
 525         color_fprintf(output, color, "%6.2f%%", ratio);
 526         fprintf(output, " frontend cycles idle   ");
 527 }
 528
 529 static void print_stalled_cycles_backend(int cpu,
 530                                          struct perf_evsel *evsel
 531                                          __maybe_unused, double avg)
 532 {
 533         double total, ratio = 0.0;
 534         const char *color;
 535
 536         total = avg_stats(&runtime_cycles_stats[cpu]);
 537
 538         if (total)
 539                 ratio = avg / total * 100.0;
 540
 541         color = get_ratio_color(GRC_STALLED_CYCLES_BE, ratio);
 542
 543         fprintf(output, " #  ");
 544         color_fprintf(output, color, "%6.2f%%", ratio);
 545         fprintf(output, " backend  cycles idle   ");
 546 }
 547
 548 static void print_branch_misses(int cpu,
 549                                 struct perf_evsel *evsel __maybe_unused,
 550                                 double avg)
 551 {
 552         double total, ratio = 0.0;
 553         const char *color;
 554
 555         total = avg_stats(&runtime_branches_stats[cpu]);
 556
 557         if (total)
 558                 ratio = avg / total * 100.0;
 559
 560         color = get_ratio_color(GRC_CACHE_MISSES, ratio);
 561
 562         fprintf(output, " #  ");
 563         color_fprintf(output, color, "%6.2f%%", ratio);
 564         fprintf(output, " of all branches        ");
 565 }
 566
 567 static void print_l1_dcache_misses(int cpu,
 568                                    struct perf_evsel *evsel __maybe_unused,
 569                                    double avg)
 570 {
 571         double total, ratio = 0.0;
 572         const char *color;
 573
 574         total = avg_stats(&runtime_l1_dcache_stats[cpu]);
 575
 576         if (total)
 577                 ratio = avg / total * 100.0;
 578
 579         color = get_ratio_color(GRC_CACHE_MISSES, ratio);
 580
 581         fprintf(output, " #  ");
 582         color_fprintf(output, color, "%6.2f%%", ratio);
 583         fprintf(output, " of all L1-dcache hits  ");
 584 }
 585
 586 static void print_l1_icache_misses(int cpu,
 587                                    struct perf_evsel *evsel __maybe_unused,
 588                                    double avg)
 589 {
 590         double total, ratio = 0.0;
 591         const char *color;
 592
 593         total = avg_stats(&runtime_l1_icache_stats[cpu]);
 594
 595         if (total)
 596                 ratio = avg / total * 100.0;
 597
 598         color = get_ratio_color(GRC_CACHE_MISSES, ratio);
 599
 600         fprintf(output, " #  ");
 601         color_fprintf(output, color, "%6.2f%%", ratio);
 602         fprintf(output, " of all L1-icache hits  ");
 603 }
 604
 605 static void print_dtlb_cache_misses(int cpu,
 606                                     struct perf_evsel *evsel __maybe_unused,
 607                                     double avg)
 608 {
 609         double total, ratio = 0.0;
 610         const char *color;
 611
 612         total = avg_stats(&runtime_dtlb_cache_stats[cpu]);
 613
 614         if (total)
 615                 ratio = avg / total * 100.0;
 616
 617         color = get_ratio_color(GRC_CACHE_MISSES, ratio);
 618
 619         fprintf(output, " #  ");
 620         color_fprintf(output, color, "%6.2f%%", ratio);
 621         fprintf(output, " of all dTLB cache hits ");
 622 }
 623
 624 static void print_itlb_cache_misses(int cpu,
 625                                     struct perf_evsel *evsel __maybe_unused,
 626                                     double avg)
 627 {
 628         double total, ratio = 0.0;
 629         const char *color;
 630
 631         total = avg_stats(&runtime_itlb_cache_stats[cpu]);
 632
 633         if (total)
 634                 ratio = avg / total * 100.0;
 635
 636         color = get_ratio_color(GRC_CACHE_MISSES, ratio);
 637
 638         fprintf(output, " #  ");
 639         color_fprintf(output, color, "%6.2f%%", ratio);
 640         fprintf(output, " of all iTLB cache hits ");
 641 }
 642
 643 static void print_ll_cache_misses(int cpu,
 644                                   struct perf_evsel *evsel __maybe_unused,
 645                                   double avg)
 646 {
 647         double total, ratio = 0.0;
 648         const char *color;
 649
 650         total = avg_stats(&runtime_ll_cache_stats[cpu]);
 651
 652         if (total)
 653                 ratio = avg / total * 100.0;
 654
 655         color = get_ratio_color(GRC_CACHE_MISSES, ratio);
 656
 657         fprintf(output, " #  ");
 658         color_fprintf(output, color, "%6.2f%%", ratio);
 659         fprintf(output, " of all LL-cache hits   ");
 660 }
 661
 662 static void abs_printout(int cpu, struct perf_evsel *evsel, double avg)
 663 {
 664         double total, ratio = 0.0;
 665         char cpustr[16] = { '\0', };
 666         const char *fmt;
 667
 668         if (csv_output)
 669                 fmt = "%s%.0f%s%s";
 670         else if (big_num)
 671                 fmt = "%s%'18.0f%s%-25s";
 672         else
 673                 fmt = "%s%18.0f%s%-25s";
 674
 675         if (no_aggr)
 676                 sprintf(cpustr, "CPU%*d%s",
 677                         csv_output ? 0 : -4,
 678                         perf_evsel__cpus(evsel)->map[cpu], csv_sep);
 679         else
 680                 cpu = 0;
 681
 682         fprintf(output, fmt, cpustr, avg, csv_sep, perf_evsel__name(evsel));
 683
 684         if (evsel->cgrp)
 685                 fprintf(output, "%s%s", csv_sep, evsel->cgrp->name);
 686
 687         if (csv_output)
 688                 return;
 689
 690         if (perf_evsel__match(evsel, HARDWARE, HW_INSTRUCTIONS)) {
 691                 total = avg_stats(&runtime_cycles_stats[cpu]);
 692
 693                 if (total)
 694                         ratio = avg / total;
 695
 696                 fprintf(output, " #   %5.2f  insns per cycle        ", ratio);
 697
 698                 total = avg_stats(&runtime_stalled_cycles_front_stats[cpu]);
 699                 total = max(total, avg_stats(&runtime_stalled_cycles_back_stats[cpu]));
 700
 701                 if (total && avg) {
 702                         ratio = total / avg;
 703                         fprintf(output, "\n                                             #   %5.2f  stalled cycles per insn", ratio);
 704                 }
 705
 706         } else if (perf_evsel__match(evsel, HARDWARE, HW_BRANCH_MISSES) &&
 707                         runtime_branches_stats[cpu].n != 0) {
 708                 print_branch_misses(cpu, evsel, avg);
 709         } else if (
 710                 evsel->attr.type == PERF_TYPE_HW_CACHE &&
 711                 evsel->attr.config ==  ( PERF_COUNT_HW_CACHE_L1D |
 712                                         ((PERF_COUNT_HW_CACHE_OP_READ) << 8) |
 713                                         ((PERF_COUNT_HW_CACHE_RESULT_MISS) << 16)) &&
 714                         runtime_l1_dcache_stats[cpu].n != 0) {
 715                 print_l1_dcache_misses(cpu, evsel, avg);
 716         } else if (
 717                 evsel->attr.type == PERF_TYPE_HW_CACHE &&
 718                 evsel->attr.config ==  ( PERF_COUNT_HW_CACHE_L1I |
 719                                         ((PERF_COUNT_HW_CACHE_OP_READ) << 8) |
 720                                         ((PERF_COUNT_HW_CACHE_RESULT_MISS) << 16)) &&
 721                         runtime_l1_icache_stats[cpu].n != 0) {
 722                 print_l1_icache_misses(cpu, evsel, avg);
 723         } else if (
 724                 evsel->attr.type == PERF_TYPE_HW_CACHE &&
 725                 evsel->attr.config ==  ( PERF_COUNT_HW_CACHE_DTLB |
 726                                         ((PERF_COUNT_HW_CACHE_OP_READ) << 8) |
 727                                         ((PERF_COUNT_HW_CACHE_RESULT_MISS) << 16)) &&
 728                         runtime_dtlb_cache_stats[cpu].n != 0) {
 729                 print_dtlb_cache_misses(cpu, evsel, avg);
 730         } else if (
 731                 evsel->attr.type == PERF_TYPE_HW_CACHE &&
 732                 evsel->attr.config ==  ( PERF_COUNT_HW_CACHE_ITLB |
 733                                         ((PERF_COUNT_HW_CACHE_OP_READ) << 8) |
 734                                         ((PERF_COUNT_HW_CACHE_RESULT_MISS) << 16)) &&
 735                         runtime_itlb_cache_stats[cpu].n != 0) {
 736                 print_itlb_cache_misses(cpu, evsel, avg);
 737         } else if (
 738                 evsel->attr.type == PERF_TYPE_HW_CACHE &&
 739                 evsel->attr.config ==  ( PERF_COUNT_HW_CACHE_LL |
 740                                         ((PERF_COUNT_HW_CACHE_OP_READ) << 8) |
 741                                         ((PERF_COUNT_HW_CACHE_RESULT_MISS) << 16)) &&
 742                         runtime_ll_cache_stats[cpu].n != 0) {
 743                 print_ll_cache_misses(cpu, evsel, avg);
 744         } else if (perf_evsel__match(evsel, HARDWARE, HW_CACHE_MISSES) &&
 745                         runtime_cacherefs_stats[cpu].n != 0) {
 746                 total = avg_stats(&runtime_cacherefs_stats[cpu]);
 747
 748                 if (total)
 749                         ratio = avg * 100 / total;
 750
 751                 fprintf(output, " # %8.3f %% of all cache refs    ", ratio);
 752
 753         } else if (perf_evsel__match(evsel, HARDWARE, HW_STALLED_CYCLES_FRONTEND)) {
 754                 print_stalled_cycles_frontend(cpu, evsel, avg);
 755         } else if (perf_evsel__match(evsel, HARDWARE, HW_STALLED_CYCLES_BACKEND)) {
 756                 print_stalled_cycles_backend(cpu, evsel, avg);
 757         } else if (perf_evsel__match(evsel, HARDWARE, HW_CPU_CYCLES)) {
 758                 total = avg_stats(&runtime_nsecs_stats[cpu]);
 759
 760                 if (total)
 761                         ratio = 1.0 * avg / total;
 762
 763                 fprintf(output, " # %8.3f GHz                    ", ratio);
 764         } else if (runtime_nsecs_stats[cpu].n != 0) {
 765                 char unit = 'M';
 766
 767                 total = avg_stats(&runtime_nsecs_stats[cpu]);
 768
 769                 if (total)
 770                         ratio = 1000.0 * avg / total;
 771                 if (ratio < 0.001) {
 772                         ratio *= 1000;
 773                         unit = 'K';
 774                 }
 775
 776                 fprintf(output, " # %8.3f %c/sec                  ", ratio, unit);
 777         } else {
 778                 fprintf(output, "                                   ");
 779         }
 780 }
 781
 782 /*
 783  * Print out the results of a single counter:
 784  * aggregated counts in system-wide mode
 785  */
 786 static void print_counter_aggr(struct perf_evsel *counter)
 787 {
 788         struct perf_stat *ps = counter->priv;
 789         double avg = avg_stats(&ps->res_stats[0]);
 790         int scaled = counter->counts->scaled;
 791
 792         if (scaled == -1) {
 793                 fprintf(output, "%*s%s%*s",
 794                         csv_output ? 0 : 18,
 795                         counter->supported ? CNTR_NOT_COUNTED : CNTR_NOT_SUPPORTED,
 796                         csv_sep,
 797                         csv_output ? 0 : -24,
 798                         perf_evsel__name(counter));
 799
 800                 if (counter->cgrp)
 801                         fprintf(output, "%s%s", csv_sep, counter->cgrp->name);
 802
 803                 fputc('\n', output);
 804                 return;
 805         }
 806
 807         if (nsec_counter(counter))
 808                 nsec_printout(-1, counter, avg);
 809         else
 810                 abs_printout(-1, counter, avg);
 811
 812         print_noise(counter, avg);
 813
 814         if (csv_output) {
 815                 fputc('\n', output);
 816                 return;
 817         }
 818
 819         if (scaled) {
 820                 double avg_enabled, avg_running;
 821
 822                 avg_enabled = avg_stats(&ps->res_stats[1]);
 823                 avg_running = avg_stats(&ps->res_stats[2]);
 824
 825                 fprintf(output, " [%5.2f%%]", 100 * avg_running / avg_enabled);
 826         }
 827         fprintf(output, "\n");
 828 }
 829
 830 /*
 831  * Print out the results of a single counter:
 832  * does not use aggregated count in system-wide
 833  */
 834 static void print_counter(struct perf_evsel *counter)
 835 {
 836         u64 ena, run, val;
 837         int cpu;
 838
 839         for (cpu = 0; cpu < perf_evsel__nr_cpus(counter); cpu++) {
 840                 val = counter->counts->cpu[cpu].val;
 841                 ena = counter->counts->cpu[cpu].ena;
 842                 run = counter->counts->cpu[cpu].run;
 843                 if (run == 0 || ena == 0) {
 844                         fprintf(output, "CPU%*d%s%*s%s%*s",
 845                                 csv_output ? 0 : -4,
 846                                 perf_evsel__cpus(counter)->map[cpu], csv_sep,
 847                                 csv_output ? 0 : 18,
 848                                 counter->supported ? CNTR_NOT_COUNTED : CNTR_NOT_SUPPORTED,
 849                                 csv_sep,
 850                                 csv_output ? 0 : -24,
 851                                 perf_evsel__name(counter));
 852
 853                         if (counter->cgrp)
 854                                 fprintf(output, "%s%s",
 855                                         csv_sep, counter->cgrp->name);
 856
 857                         fputc('\n', output);
 858                         continue;
 859                 }
 860
 861                 if (nsec_counter(counter))
 862                         nsec_printout(cpu, counter, val);
 863                 else
 864                         abs_printout(cpu, counter, val);
 865
 866                 if (!csv_output) {
 867                         print_noise(counter, 1.0);
 868
 869                         if (run != ena)
 870                                 fprintf(output, "  (%.2f%%)",
 871                                         100.0 * run / ena);
 872                 }
 873                 fputc('\n', output);
 874         }
 875 }
 876
 877 static void print_stat(int argc, const char **argv)
 878 {
 879         struct perf_evsel *counter;
 880         int i;
 881
 882         fflush(stdout);
 883
 884         if (!csv_output) {
 885                 fprintf(output, "\n");
 886                 fprintf(output, " Performance counter stats for ");
 887                 if (!perf_target__has_task(&target)) {
 888                         fprintf(output, "\'%s", argv[0]);
 889                         for (i = 1; i < argc; i++)
 890                                 fprintf(output, " %s", argv[i]);
 891                 } else if (target.pid)
 892                         fprintf(output, "process id \'%s", target.pid);
 893                 else
 894                         fprintf(output, "thread id \'%s", target.tid);
 895
 896                 fprintf(output, "\'");
 897                 if (run_count > 1)
 898                         fprintf(output, " (%d runs)", run_count);
 899                 fprintf(output, ":\n\n");
 900         }
 901
 902         if (no_aggr) {
 903                 list_for_each_entry(counter, &evsel_list->entries, node)
 904                         print_counter(counter);
 905         } else {
 906                 list_for_each_entry(counter, &evsel_list->entries, node)
 907                         print_counter_aggr(counter);
 908         }
 909
 910         if (!csv_output) {
 911                 if (!null_run)
 912                         fprintf(output, "\n");
 913                 fprintf(output, " %17.9f seconds time elapsed",
 914                                 avg_stats(&walltime_nsecs_stats)/1e9);
 915                 if (run_count > 1) {
 916                         fprintf(output, "                                        ");
 917                         print_noise_pct(stddev_stats(&walltime_nsecs_stats),
 918                                         avg_stats(&walltime_nsecs_stats));
 919                 }
 920                 fprintf(output, "\n\n");
 921         }
 922 }
 923
 924 static volatile int signr = -1;
 925
 926 static void skip_signal(int signo)
 927 {
 928         if(child_pid == -1)
 929                 done = 1;
 930
 931         signr = signo;
 932 }
 933
 934 static void sig_atexit(void)
 935 {
 936         if (child_pid != -1)
 937                 kill(child_pid, SIGTERM);
 938
 939         if (signr == -1)
 940                 return;
 941
 942         signal(signr, SIG_DFL);
 943         kill(getpid(), signr);
 944 }
 945
 946 static int stat__set_big_num(const struct option *opt __maybe_unused,
 947                              const char *s __maybe_unused, int unset)
 948 {
 949         big_num_opt = unset ? 0 : 1;
 950         return 0;
 951 }
 952
 953 /*
 954  * Add default attributes, if there were no attributes specified or
 955  * if -d/--detailed, -d -d or -d -d -d is used:
 956  */
 957 static int add_default_attributes(void)
 958 {
 959         struct perf_event_attr default_attrs[] = {
 960
 961   { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_TASK_CLOCK              },
 962   { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_CONTEXT_SWITCHES        },
 963   { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_CPU_MIGRATIONS          },
 964   { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_PAGE_FAULTS             },
 965
 966   { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_CPU_CYCLES              },
 967   { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_STALLED_CYCLES_FRONTEND },
 968   { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_STALLED_CYCLES_BACKEND  },
 969   { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_INSTRUCTIONS            },
 970   { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_BRANCH_INSTRUCTIONS     },
 971   { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_BRANCH_MISSES           },
 972
 973 };
 974
 975 /*
 976  * Detailed stats (-d), covering the L1 and last level data caches:
 977  */
 978         struct perf_event_attr detailed_attrs[] = {
 979
 980   { .type = PERF_TYPE_HW_CACHE,
 981     .config =
 982          PERF_COUNT_HW_CACHE_L1D                <<  0  |
 983         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
 984         (PERF_COUNT_HW_CACHE_RESULT_ACCESS      << 16)                          },
 985
 986   { .type = PERF_TYPE_HW_CACHE,
 987     .config =
 988          PERF_COUNT_HW_CACHE_L1D                <<  0  |
 989         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
 990         (PERF_COUNT_HW_CACHE_RESULT_MISS        << 16)                          },
 991
 992   { .type = PERF_TYPE_HW_CACHE,
 993     .config =
 994          PERF_COUNT_HW_CACHE_LL                 <<  0  |
 995         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
 996         (PERF_COUNT_HW_CACHE_RESULT_ACCESS      << 16)                          },
 997
 998   { .type = PERF_TYPE_HW_CACHE,
 999     .config =
1000          PERF_COUNT_HW_CACHE_LL                 <<  0  |
1001         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
1002         (PERF_COUNT_HW_CACHE_RESULT_MISS        << 16)                          },
1003 };
1004
1005 /*
1006  * Very detailed stats (-d -d), covering the instruction cache and the TLB caches:
1007  */
1008         struct perf_event_attr very_detailed_attrs[] = {
1009
1010   { .type = PERF_TYPE_HW_CACHE,
1011     .config =
1012          PERF_COUNT_HW_CACHE_L1I                <<  0  |
1013         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
1014         (PERF_COUNT_HW_CACHE_RESULT_ACCESS      << 16)                          },
1015
1016   { .type = PERF_TYPE_HW_CACHE,
1017     .config =
1018          PERF_COUNT_HW_CACHE_L1I                <<  0  |
1019         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
1020         (PERF_COUNT_HW_CACHE_RESULT_MISS        << 16)                          },
1021
1022   { .type = PERF_TYPE_HW_CACHE,
1023     .config =
1024          PERF_COUNT_HW_CACHE_DTLB               <<  0  |
1025         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
1026         (PERF_COUNT_HW_CACHE_RESULT_ACCESS      << 16)                          },
1027
1028   { .type = PERF_TYPE_HW_CACHE,
1029     .config =
1030          PERF_COUNT_HW_CACHE_DTLB               <<  0  |
1031         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
1032         (PERF_COUNT_HW_CACHE_RESULT_MISS        << 16)                          },
1033
1034   { .type = PERF_TYPE_HW_CACHE,
1035     .config =
1036          PERF_COUNT_HW_CACHE_ITLB               <<  0  |
1037         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
1038         (PERF_COUNT_HW_CACHE_RESULT_ACCESS      << 16)                          },
1039
1040   { .type = PERF_TYPE_HW_CACHE,
1041     .config =
1042          PERF_COUNT_HW_CACHE_ITLB               <<  0  |
1043         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
1044         (PERF_COUNT_HW_CACHE_RESULT_MISS        << 16)                          },
1045
1046 };
1047
1048 /*
1049  * Very, very detailed stats (-d -d -d), adding prefetch events:
1050  */
1051         struct perf_event_attr very_very_detailed_attrs[] = {
1052
1053   { .type = PERF_TYPE_HW_CACHE,
1054     .config =
1055          PERF_COUNT_HW_CACHE_L1D                <<  0  |
1056         (PERF_COUNT_HW_CACHE_OP_PREFETCH        <<  8) |
1057         (PERF_COUNT_HW_CACHE_RESULT_ACCESS      << 16)                          },
1058
1059   { .type = PERF_TYPE_HW_CACHE,
1060     .config =
1061          PERF_COUNT_HW_CACHE_L1D                <<  0  |
1062         (PERF_COUNT_HW_CACHE_OP_PREFETCH        <<  8) |
1063         (PERF_COUNT_HW_CACHE_RESULT_MISS        << 16)                          },
1064 };
1065
1066         /* Set attrs if no event is selected and !null_run: */
1067         if (null_run)
1068                 return 0;
1069
1070         if (!evsel_list->nr_entries) {
1071                 if (perf_evlist__add_default_attrs(evsel_list, default_attrs) < 0)
1072                         return -1;
1073         }
1074
1075         /* Detailed events get appended to the event list: */
1076
1077         if (detailed_run <  1)
1078                 return 0;
1079
1080         /* Append detailed run extra attributes: */
1081         if (perf_evlist__add_default_attrs(evsel_list, detailed_attrs) < 0)
1082                 return -1;
1083
1084         if (detailed_run < 2)
1085                 return 0;
1086
1087         /* Append very detailed run extra attributes: */
1088         if (perf_evlist__add_default_attrs(evsel_list, very_detailed_attrs) < 0)
1089                 return -1;
1090
1091         if (detailed_run < 3)
1092                 return 0;
1093
1094         /* Append very, very detailed run extra attributes: */
1095         return perf_evlist__add_default_attrs(evsel_list, very_very_detailed_attrs);
1096 }
1097
1098 int cmd_stat(int argc, const char **argv, const char *prefix __maybe_unused)
1099 {
1100         bool append_file = false;
1101         int output_fd = 0;
1102         const char *output_name = NULL;
1103         const struct option options[] = {
1104         OPT_CALLBACK('e', "event", &evsel_list, "event",
1105                      "event selector. use 'perf list' to list available events",
1106                      parse_events_option),
1107         OPT_CALLBACK(0, "filter", &evsel_list, "filter",
1108                      "event filter", parse_filter),
1109         OPT_BOOLEAN('i', "no-inherit", &no_inherit,
1110                     "child tasks do not inherit counters"),
1111         OPT_STRING('p', "pid", &target.pid, "pid",
1112                    "stat events on existing process id"),
1113         OPT_STRING('t', "tid", &target.tid, "tid",
1114                    "stat events on existing thread id"),
1115         OPT_BOOLEAN('a', "all-cpus", &target.system_wide,
1116                     "system-wide collection from all CPUs"),
1117         OPT_BOOLEAN('g', "group", &group,
1118                     "put the counters into a counter group"),
1119         OPT_BOOLEAN('c', "scale", &scale, "scale/normalize counters"),
1120         OPT_INCR('v', "verbose", &verbose,
1121                     "be more verbose (show counter open errors, etc)"),
1122         OPT_INTEGER('r', "repeat", &run_count,
1123                     "repeat command and print average + stddev (max: 100)"),
1124         OPT_BOOLEAN('n', "null", &null_run,
1125                     "null run - dont start any counters"),
1126         OPT_INCR('d', "detailed", &detailed_run,
1127                     "detailed run - start a lot of events"),
1128         OPT_BOOLEAN('S', "sync", &sync_run,
1129                     "call sync() before starting a run"),
1130         OPT_CALLBACK_NOOPT('B', "big-num", NULL, NULL,
1131                            "print large numbers with thousands\' separators",
1132                            stat__set_big_num),
1133         OPT_STRING('C', "cpu", &target.cpu_list, "cpu",
1134                     "list of cpus to monitor in system-wide"),
1135         OPT_BOOLEAN('A', "no-aggr", &no_aggr, "disable CPU count aggregation"),
1136         OPT_STRING('x', "field-separator", &csv_sep, "separator",
1137                    "print counts with custom separator"),
1138         OPT_CALLBACK('G', "cgroup", &evsel_list, "name",
1139                      "monitor event in cgroup name only", parse_cgroups),
1140         OPT_STRING('o', "output", &output_name, "file", "output file name"),
1141         OPT_BOOLEAN(0, "append", &append_file, "append to the output file"),
1142         OPT_INTEGER(0, "log-fd", &output_fd,
1143                     "log output to fd, instead of stderr"),
1144         OPT_STRING(0, "pre", &pre_cmd, "command",
1145                         "command to run prior to the measured command"),
1146         OPT_STRING(0, "post", &post_cmd, "command",
1147                         "command to run after to the measured command"),
1148         OPT_END()
1149         };
1150         const char * const stat_usage[] = {
1151                 "perf stat [<options>] [<command>]",
1152                 NULL
1153         };
1154         struct perf_evsel *pos;
1155         int status = -ENOMEM, run_idx;
1156         const char *mode;
1157
1158         setlocale(LC_ALL, "");
1159
1160         evsel_list = perf_evlist__new(NULL, NULL);
1161         if (evsel_list == NULL)
1162                 return -ENOMEM;
1163
1164         argc = parse_options(argc, argv, options, stat_usage,
1165                 PARSE_OPT_STOP_AT_NON_OPTION);
1166
1167         output = stderr;
1168         if (output_name && strcmp(output_name, "-"))
1169                 output = NULL;
1170
1171         if (output_name && output_fd) {
1172                 fprintf(stderr, "cannot use both --output and --log-fd\n");
1173                 usage_with_options(stat_usage, options);
1174         }
1175
1176         if (output_fd < 0) {
1177                 fprintf(stderr, "argument to --log-fd must be a > 0\n");
1178                 usage_with_options(stat_usage, options);
1179         }
1180
1181         if (!output) {
1182                 struct timespec tm;
1183                 mode = append_file ? "a" : "w";
1184
1185                 output = fopen(output_name, mode);
1186                 if (!output) {
1187                         perror("failed to create output file");
1188                         return -1;
1189                 }
1190                 clock_gettime(CLOCK_REALTIME, &tm);
1191                 fprintf(output, "# started on %s\n", ctime(&tm.tv_sec));
1192         } else if (output_fd > 0) {
1193                 mode = append_file ? "a" : "w";
1194                 output = fdopen(output_fd, mode);
1195                 if (!output) {
1196                         perror("Failed opening logfd");
1197                         return -errno;
1198                 }
1199         }
1200
1201         if (csv_sep) {
1202                 csv_output = true;
1203                 if (!strcmp(csv_sep, "\\t"))
1204                         csv_sep = "\t";
1205         } else
1206                 csv_sep = DEFAULT_SEPARATOR;
1207
1208         /*
1209          * let the spreadsheet do the pretty-printing
1210          */
1211         if (csv_output) {
1212                 /* User explicitly passed -B? */
1213                 if (big_num_opt == 1) {
1214                         fprintf(stderr, "-B option not supported with -x\n");
1215                         usage_with_options(stat_usage, options);
1216                 } else /* Nope, so disable big number formatting */
1217                         big_num = false;
1218         } else if (big_num_opt == 0) /* User passed --no-big-num */
1219                 big_num = false;
1220
1221         if (!argc && !perf_target__has_task(&target))
1222                 usage_with_options(stat_usage, options);
1223         if (run_count <= 0)
1224                 usage_with_options(stat_usage, options);
1225
1226         /* no_aggr, cgroup are for system-wide only */
1227         if ((no_aggr || nr_cgroups) && !perf_target__has_cpu(&target)) {
1228                 fprintf(stderr, "both cgroup and no-aggregation "
1229                         "modes only available in system-wide mode\n");
1230
1231                 usage_with_options(stat_usage, options);
1232         }
1233
1234         if (add_default_attributes())
1235                 goto out;
1236
1237         perf_target__validate(&target);
1238
1239         if (perf_evlist__create_maps(evsel_list, &target) < 0) {
1240                 if (perf_target__has_task(&target))
1241                         pr_err("Problems finding threads of monitor\n");
1242                 if (perf_target__has_cpu(&target))
1243                         perror("failed to parse CPUs map");
1244
1245                 usage_with_options(stat_usage, options);
1246                 return -1;
1247         }
1248
1249         list_for_each_entry(pos, &evsel_list->entries, node) {
1250                 if (perf_evsel__alloc_stat_priv(pos) < 0 ||
1251                     perf_evsel__alloc_counts(pos, perf_evsel__nr_cpus(pos)) < 0)
1252                         goto out_free_fd;
1253         }
1254
1255         /*
1256          * We dont want to block the signals - that would cause
1257          * child tasks to inherit that and Ctrl-C would not work.
1258          * What we want is for Ctrl-C to work in the exec()-ed
1259          * task, but being ignored by perf stat itself:
1260          */
1261         atexit(sig_atexit);
1262         signal(SIGINT,  skip_signal);
1263         signal(SIGALRM, skip_signal);
1264         signal(SIGABRT, skip_signal);
1265
1266         status = 0;
1267         for (run_idx = 0; run_idx < run_count; run_idx++) {
1268                 if (run_count != 1 && verbose)
1269                         fprintf(output, "[ perf stat: executing run #%d ... ]\n",
1270                                 run_idx + 1);
1271
1272                 status = run_perf_stat(argc, argv);
1273         }
1274
1275         if (status != -1)
1276                 print_stat(argc, argv);
1277 out_free_fd:
1278         list_for_each_entry(pos, &evsel_list->entries, node)
1279                 perf_evsel__free_stat_priv(pos);
1280         perf_evlist__delete_maps(evsel_list);
1281 out:
1282         perf_evlist__delete(evsel_list);
1283         return status;
1284 }