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/header.h"
  55 #include "util/cpumap.h"
  56 #include "util/thread.h"
  57 #include "util/thread_map.h"
  58
  59 #include <sys/prctl.h>
  60 #include <math.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_event_attr default_attrs[] = {
  68
  69   { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_TASK_CLOCK              },
  70   { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_CONTEXT_SWITCHES        },
  71   { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_CPU_MIGRATIONS          },
  72   { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_PAGE_FAULTS             },
  73
  74   { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_CPU_CYCLES              },
  75   { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_STALLED_CYCLES_FRONTEND },
  76   { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_STALLED_CYCLES_BACKEND  },
  77   { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_INSTRUCTIONS            },
  78   { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_BRANCH_INSTRUCTIONS     },
  79   { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_BRANCH_MISSES           },
  80
  81 };
  82
  83 /*
  84  * Detailed stats (-d), covering the L1 and last level data caches:
  85  */
  86 static struct perf_event_attr detailed_attrs[] = {
  87
  88   { .type = PERF_TYPE_HW_CACHE,
  89     .config =
  90          PERF_COUNT_HW_CACHE_L1D                <<  0  |
  91         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
  92         (PERF_COUNT_HW_CACHE_RESULT_ACCESS      << 16)                          },
  93
  94   { .type = PERF_TYPE_HW_CACHE,
  95     .config =
  96          PERF_COUNT_HW_CACHE_L1D                <<  0  |
  97         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
  98         (PERF_COUNT_HW_CACHE_RESULT_MISS        << 16)                          },
  99
 100   { .type = PERF_TYPE_HW_CACHE,
 101     .config =
 102          PERF_COUNT_HW_CACHE_LL                 <<  0  |
 103         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
 104         (PERF_COUNT_HW_CACHE_RESULT_ACCESS      << 16)                          },
 105
 106   { .type = PERF_TYPE_HW_CACHE,
 107     .config =
 108          PERF_COUNT_HW_CACHE_LL                 <<  0  |
 109         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
 110         (PERF_COUNT_HW_CACHE_RESULT_MISS        << 16)                          },
 111 };
 112
 113 /*
 114  * Very detailed stats (-d -d), covering the instruction cache and the TLB caches:
 115  */
 116 static struct perf_event_attr very_detailed_attrs[] = {
 117
 118   { .type = PERF_TYPE_HW_CACHE,
 119     .config =
 120          PERF_COUNT_HW_CACHE_L1I                <<  0  |
 121         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
 122         (PERF_COUNT_HW_CACHE_RESULT_ACCESS      << 16)                          },
 123
 124   { .type = PERF_TYPE_HW_CACHE,
 125     .config =
 126          PERF_COUNT_HW_CACHE_L1I                <<  0  |
 127         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
 128         (PERF_COUNT_HW_CACHE_RESULT_MISS        << 16)                          },
 129
 130   { .type = PERF_TYPE_HW_CACHE,
 131     .config =
 132          PERF_COUNT_HW_CACHE_DTLB               <<  0  |
 133         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
 134         (PERF_COUNT_HW_CACHE_RESULT_ACCESS      << 16)                          },
 135
 136   { .type = PERF_TYPE_HW_CACHE,
 137     .config =
 138          PERF_COUNT_HW_CACHE_DTLB               <<  0  |
 139         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
 140         (PERF_COUNT_HW_CACHE_RESULT_MISS        << 16)                          },
 141
 142   { .type = PERF_TYPE_HW_CACHE,
 143     .config =
 144          PERF_COUNT_HW_CACHE_ITLB               <<  0  |
 145         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
 146         (PERF_COUNT_HW_CACHE_RESULT_ACCESS      << 16)                          },
 147
 148   { .type = PERF_TYPE_HW_CACHE,
 149     .config =
 150          PERF_COUNT_HW_CACHE_ITLB               <<  0  |
 151         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
 152         (PERF_COUNT_HW_CACHE_RESULT_MISS        << 16)                          },
 153
 154 };
 155
 156 /*
 157  * Very, very detailed stats (-d -d -d), adding prefetch events:
 158  */
 159 static struct perf_event_attr very_very_detailed_attrs[] = {
 160
 161   { .type = PERF_TYPE_HW_CACHE,
 162     .config =
 163          PERF_COUNT_HW_CACHE_L1D                <<  0  |
 164         (PERF_COUNT_HW_CACHE_OP_PREFETCH        <<  8) |
 165         (PERF_COUNT_HW_CACHE_RESULT_ACCESS      << 16)                          },
 166
 167   { .type = PERF_TYPE_HW_CACHE,
 168     .config =
 169          PERF_COUNT_HW_CACHE_L1D                <<  0  |
 170         (PERF_COUNT_HW_CACHE_OP_PREFETCH        <<  8) |
 171         (PERF_COUNT_HW_CACHE_RESULT_MISS        << 16)                          },
 172 };
 173
 174
 175
 176 struct perf_evlist              *evsel_list;
 177
 178 static bool                     system_wide                     =  false;
 179 static int                      run_idx                         =  0;
 180
 181 static int                      run_count                       =  1;
 182 static bool                     no_inherit                      = false;
 183 static bool                     scale                           =  true;
 184 static bool                     no_aggr                         = false;
 185 static const char               *target_pid;
 186 static const char               *target_tid;
 187 static pid_t                    child_pid                       = -1;
 188 static bool                     null_run                        =  false;
 189 static int                      detailed_run                    =  0;
 190 static bool                     sync_run                        =  false;
 191 static bool                     big_num                         =  true;
 192 static int                      big_num_opt                     =  -1;
 193 static const char               *cpu_list;
 194 static const char               *csv_sep                        = NULL;
 195 static bool                     csv_output                      = false;
 196 static bool                     group                           = false;
 197 static const char               *output_name                    = NULL;
 198 static FILE                     *output                         = NULL;
 199 static int                      output_fd;
 200
 201 static volatile int done = 0;
 202
 203 struct stats
 204 {
 205         double n, mean, M2;
 206 };
 207
 208 struct perf_stat {
 209         struct stats      res_stats[3];
 210 };
 211
 212 static int perf_evsel__alloc_stat_priv(struct perf_evsel *evsel)
 213 {
 214         evsel->priv = zalloc(sizeof(struct perf_stat));
 215         return evsel->priv == NULL ? -ENOMEM : 0;
 216 }
 217
 218 static void perf_evsel__free_stat_priv(struct perf_evsel *evsel)
 219 {
 220         free(evsel->priv);
 221         evsel->priv = NULL;
 222 }
 223
 224 static void update_stats(struct stats *stats, u64 val)
 225 {
 226         double delta;
 227
 228         stats->n++;
 229         delta = val - stats->mean;
 230         stats->mean += delta / stats->n;
 231         stats->M2 += delta*(val - stats->mean);
 232 }
 233
 234 static double avg_stats(struct stats *stats)
 235 {
 236         return stats->mean;
 237 }
 238
 239 /*
 240  * http://en.wikipedia.org/wiki/Algorithms_for_calculating_variance
 241  *
 242  *       (\Sum n_i^2) - ((\Sum n_i)^2)/n
 243  * s^2 = -------------------------------
 244  *                  n - 1
 245  *
 246  * http://en.wikipedia.org/wiki/Stddev
 247  *
 248  * The std dev of the mean is related to the std dev by:
 249  *
 250  *             s
 251  * s_mean = -------
 252  *          sqrt(n)
 253  *
 254  */
 255 static double stddev_stats(struct stats *stats)
 256 {
 257         double variance, variance_mean;
 258
 259         if (!stats->n)
 260                 return 0.0;
 261
 262         variance = stats->M2 / (stats->n - 1);
 263         variance_mean = variance / stats->n;
 264
 265         return sqrt(variance_mean);
 266 }
 267
 268 struct stats                    runtime_nsecs_stats[MAX_NR_CPUS];
 269 struct stats                    runtime_cycles_stats[MAX_NR_CPUS];
 270 struct stats                    runtime_stalled_cycles_front_stats[MAX_NR_CPUS];
 271 struct stats                    runtime_stalled_cycles_back_stats[MAX_NR_CPUS];
 272 struct stats                    runtime_branches_stats[MAX_NR_CPUS];
 273 struct stats                    runtime_cacherefs_stats[MAX_NR_CPUS];
 274 struct stats                    runtime_l1_dcache_stats[MAX_NR_CPUS];
 275 struct stats                    runtime_l1_icache_stats[MAX_NR_CPUS];
 276 struct stats                    runtime_ll_cache_stats[MAX_NR_CPUS];
 277 struct stats                    runtime_itlb_cache_stats[MAX_NR_CPUS];
 278 struct stats                    runtime_dtlb_cache_stats[MAX_NR_CPUS];
 279 struct stats                    walltime_nsecs_stats;
 280
 281 static int create_perf_stat_counter(struct perf_evsel *evsel,
 282                                     struct perf_evsel *first)
 283 {
 284         struct perf_event_attr *attr = &evsel->attr;
 285         struct xyarray *group_fd = NULL;
 286
 287         if (group && evsel != first)
 288                 group_fd = first->fd;
 289
 290         if (scale)
 291                 attr->read_format = PERF_FORMAT_TOTAL_TIME_ENABLED |
 292                                     PERF_FORMAT_TOTAL_TIME_RUNNING;
 293
 294         attr->inherit = !no_inherit;
 295
 296         if (system_wide)
 297                 return perf_evsel__open_per_cpu(evsel, evsel_list->cpus,
 298                                                 group, group_fd);
 299         if (!target_pid && !target_tid && (!group || evsel == first)) {
 300                 attr->disabled = 1;
 301                 attr->enable_on_exec = 1;
 302         }
 303
 304         return perf_evsel__open_per_thread(evsel, evsel_list->threads,
 305                                            group, group_fd);
 306 }
 307
 308 /*
 309  * Does the counter have nsecs as a unit?
 310  */
 311 static inline int nsec_counter(struct perf_evsel *evsel)
 312 {
 313         if (perf_evsel__match(evsel, SOFTWARE, SW_CPU_CLOCK) ||
 314             perf_evsel__match(evsel, SOFTWARE, SW_TASK_CLOCK))
 315                 return 1;
 316
 317         return 0;
 318 }
 319
 320 /*
 321  * Update various tracking values we maintain to print
 322  * more semantic information such as miss/hit ratios,
 323  * instruction rates, etc:
 324  */
 325 static void update_shadow_stats(struct perf_evsel *counter, u64 *count)
 326 {
 327         if (perf_evsel__match(counter, SOFTWARE, SW_TASK_CLOCK))
 328                 update_stats(&runtime_nsecs_stats[0], count[0]);
 329         else if (perf_evsel__match(counter, HARDWARE, HW_CPU_CYCLES))
 330                 update_stats(&runtime_cycles_stats[0], count[0]);
 331         else if (perf_evsel__match(counter, HARDWARE, HW_STALLED_CYCLES_FRONTEND))
 332                 update_stats(&runtime_stalled_cycles_front_stats[0], count[0]);
 333         else if (perf_evsel__match(counter, HARDWARE, HW_STALLED_CYCLES_BACKEND))
 334                 update_stats(&runtime_stalled_cycles_back_stats[0], count[0]);
 335         else if (perf_evsel__match(counter, HARDWARE, HW_BRANCH_INSTRUCTIONS))
 336                 update_stats(&runtime_branches_stats[0], count[0]);
 337         else if (perf_evsel__match(counter, HARDWARE, HW_CACHE_REFERENCES))
 338                 update_stats(&runtime_cacherefs_stats[0], count[0]);
 339         else if (perf_evsel__match(counter, HW_CACHE, HW_CACHE_L1D))
 340                 update_stats(&runtime_l1_dcache_stats[0], count[0]);
 341         else if (perf_evsel__match(counter, HW_CACHE, HW_CACHE_L1I))
 342                 update_stats(&runtime_l1_icache_stats[0], count[0]);
 343         else if (perf_evsel__match(counter, HW_CACHE, HW_CACHE_LL))
 344                 update_stats(&runtime_ll_cache_stats[0], count[0]);
 345         else if (perf_evsel__match(counter, HW_CACHE, HW_CACHE_DTLB))
 346                 update_stats(&runtime_dtlb_cache_stats[0], count[0]);
 347         else if (perf_evsel__match(counter, HW_CACHE, HW_CACHE_ITLB))
 348                 update_stats(&runtime_itlb_cache_stats[0], count[0]);
 349 }
 350
 351 /*
 352  * Read out the results of a single counter:
 353  * aggregate counts across CPUs in system-wide mode
 354  */
 355 static int read_counter_aggr(struct perf_evsel *counter)
 356 {
 357         struct perf_stat *ps = counter->priv;
 358         u64 *count = counter->counts->aggr.values;
 359         int i;
 360
 361         if (__perf_evsel__read(counter, evsel_list->cpus->nr,
 362                                evsel_list->threads->nr, scale) < 0)
 363                 return -1;
 364
 365         for (i = 0; i < 3; i++)
 366                 update_stats(&ps->res_stats[i], count[i]);
 367
 368         if (verbose) {
 369                 fprintf(output, "%s: %" PRIu64 " %" PRIu64 " %" PRIu64 "\n",
 370                         event_name(counter), count[0], count[1], count[2]);
 371         }
 372
 373         /*
 374          * Save the full runtime - to allow normalization during printout:
 375          */
 376         update_shadow_stats(counter, count);
 377
 378         return 0;
 379 }
 380
 381 /*
 382  * Read out the results of a single counter:
 383  * do not aggregate counts across CPUs in system-wide mode
 384  */
 385 static int read_counter(struct perf_evsel *counter)
 386 {
 387         u64 *count;
 388         int cpu;
 389
 390         for (cpu = 0; cpu < evsel_list->cpus->nr; cpu++) {
 391                 if (__perf_evsel__read_on_cpu(counter, cpu, 0, scale) < 0)
 392                         return -1;
 393
 394                 count = counter->counts->cpu[cpu].values;
 395
 396                 update_shadow_stats(counter, count);
 397         }
 398
 399         return 0;
 400 }
 401
 402 static int run_perf_stat(int argc __used, const char **argv)
 403 {
 404         unsigned long long t0, t1;
 405         struct perf_evsel *counter, *first;
 406         int status = 0;
 407         int child_ready_pipe[2], go_pipe[2];
 408         const bool forks = (argc > 0);
 409         char buf;
 410
 411         if (forks && (pipe(child_ready_pipe) < 0 || pipe(go_pipe) < 0)) {
 412                 perror("failed to create pipes");
 413                 exit(1);
 414         }
 415
 416         if (forks) {
 417                 if ((child_pid = fork()) < 0)
 418                         perror("failed to fork");
 419
 420                 if (!child_pid) {
 421                         close(child_ready_pipe[0]);
 422                         close(go_pipe[1]);
 423                         fcntl(go_pipe[0], F_SETFD, FD_CLOEXEC);
 424
 425                         /*
 426                          * Do a dummy execvp to get the PLT entry resolved,
 427                          * so we avoid the resolver overhead on the real
 428                          * execvp call.
 429                          */
 430                         execvp("", (char **)argv);
 431
 432                         /*
 433                          * Tell the parent we're ready to go
 434                          */
 435                         close(child_ready_pipe[1]);
 436
 437                         /*
 438                          * Wait until the parent tells us to go.
 439                          */
 440                         if (read(go_pipe[0], &buf, 1) == -1)
 441                                 perror("unable to read pipe");
 442
 443                         execvp(argv[0], (char **)argv);
 444
 445                         perror(argv[0]);
 446                         exit(-1);
 447                 }
 448
 449                 if (!target_tid && !target_pid && !system_wide)
 450                         evsel_list->threads->map[0] = child_pid;
 451
 452                 /*
 453                  * Wait for the child to be ready to exec.
 454                  */
 455                 close(child_ready_pipe[1]);
 456                 close(go_pipe[0]);
 457                 if (read(child_ready_pipe[0], &buf, 1) == -1)
 458                         perror("unable to read pipe");
 459                 close(child_ready_pipe[0]);
 460         }
 461
 462         first = list_entry(evsel_list->entries.next, struct perf_evsel, node);
 463
 464         list_for_each_entry(counter, &evsel_list->entries, node) {
 465                 if (create_perf_stat_counter(counter, first) < 0) {
 466                         if (errno == EINVAL || errno == ENOSYS ||
 467                             errno == ENOENT || errno == EOPNOTSUPP) {
 468                                 if (verbose)
 469                                         ui__warning("%s event is not supported by the kernel.\n",
 470                                                     event_name(counter));
 471                                 counter->supported = false;
 472                                 continue;
 473                         }
 474
 475                         if (errno == EPERM || errno == EACCES) {
 476                                 error("You may not have permission to collect %sstats.\n"
 477                                       "\t Consider tweaking"
 478                                       " /proc/sys/kernel/perf_event_paranoid or running as root.",
 479                                       system_wide ? "system-wide " : "");
 480                         } else {
 481                                 error("open_counter returned with %d (%s). "
 482                                       "/bin/dmesg may provide additional information.\n",
 483                                        errno, strerror(errno));
 484                         }
 485                         if (child_pid != -1)
 486                                 kill(child_pid, SIGTERM);
 487                         die("Not all events could be opened.\n");
 488                         return -1;
 489                 }
 490                 counter->supported = true;
 491         }
 492
 493         if (perf_evlist__set_filters(evsel_list)) {
 494                 error("failed to set filter with %d (%s)\n", errno,
 495                         strerror(errno));
 496                 return -1;
 497         }
 498
 499         /*
 500          * Enable counters and exec the command:
 501          */
 502         t0 = rdclock();
 503
 504         if (forks) {
 505                 close(go_pipe[1]);
 506                 wait(&status);
 507                 if (WIFSIGNALED(status))
 508                         psignal(WTERMSIG(status), argv[0]);
 509         } else {
 510                 while(!done) sleep(1);
 511         }
 512
 513         t1 = rdclock();
 514
 515         update_stats(&walltime_nsecs_stats, t1 - t0);
 516
 517         if (no_aggr) {
 518                 list_for_each_entry(counter, &evsel_list->entries, node) {
 519                         read_counter(counter);
 520                         perf_evsel__close_fd(counter, evsel_list->cpus->nr, 1);
 521                 }
 522         } else {
 523                 list_for_each_entry(counter, &evsel_list->entries, node) {
 524                         read_counter_aggr(counter);
 525                         perf_evsel__close_fd(counter, evsel_list->cpus->nr,
 526                                              evsel_list->threads->nr);
 527                 }
 528         }
 529
 530         return WEXITSTATUS(status);
 531 }
 532
 533 static void print_noise_pct(double total, double avg)
 534 {
 535         double pct = 0.0;
 536
 537         if (avg)
 538                 pct = 100.0*total/avg;
 539
 540         if (csv_output)
 541                 fprintf(output, "%s%.2f%%", csv_sep, pct);
 542         else if (pct)
 543                 fprintf(output, "  ( +-%6.2f%% )", pct);
 544 }
 545
 546 static void print_noise(struct perf_evsel *evsel, double avg)
 547 {
 548         struct perf_stat *ps;
 549
 550         if (run_count == 1)
 551                 return;
 552
 553         ps = evsel->priv;
 554         print_noise_pct(stddev_stats(&ps->res_stats[0]), avg);
 555 }
 556
 557 static void nsec_printout(int cpu, struct perf_evsel *evsel, double avg)
 558 {
 559         double msecs = avg / 1e6;
 560         char cpustr[16] = { '\0', };
 561         const char *fmt = csv_output ? "%s%.6f%s%s" : "%s%18.6f%s%-25s";
 562
 563         if (no_aggr)
 564                 sprintf(cpustr, "CPU%*d%s",
 565                         csv_output ? 0 : -4,
 566                         evsel_list->cpus->map[cpu], csv_sep);
 567
 568         fprintf(output, fmt, cpustr, msecs, csv_sep, event_name(evsel));
 569
 570         if (evsel->cgrp)
 571                 fprintf(output, "%s%s", csv_sep, evsel->cgrp->name);
 572
 573         if (csv_output)
 574                 return;
 575
 576         if (perf_evsel__match(evsel, SOFTWARE, SW_TASK_CLOCK))
 577                 fprintf(output, " # %8.3f CPUs utilized          ",
 578                         avg / avg_stats(&walltime_nsecs_stats));
 579         else
 580                 fprintf(output, "                                   ");
 581 }
 582
 583 /* used for get_ratio_color() */
 584 enum grc_type {
 585         GRC_STALLED_CYCLES_FE,
 586         GRC_STALLED_CYCLES_BE,
 587         GRC_CACHE_MISSES,
 588         GRC_MAX_NR
 589 };
 590
 591 static const char *get_ratio_color(enum grc_type type, double ratio)
 592 {
 593         static const double grc_table[GRC_MAX_NR][3] = {
 594                 [GRC_STALLED_CYCLES_FE] = { 50.0, 30.0, 10.0 },
 595                 [GRC_STALLED_CYCLES_BE] = { 75.0, 50.0, 20.0 },
 596                 [GRC_CACHE_MISSES]      = { 20.0, 10.0, 5.0 },
 597         };
 598         const char *color = PERF_COLOR_NORMAL;
 599
 600         if (ratio > grc_table[type][0])
 601                 color = PERF_COLOR_RED;
 602         else if (ratio > grc_table[type][1])
 603                 color = PERF_COLOR_MAGENTA;
 604         else if (ratio > grc_table[type][2])
 605                 color = PERF_COLOR_YELLOW;
 606
 607         return color;
 608 }
 609
 610 static void print_stalled_cycles_frontend(int cpu, struct perf_evsel *evsel __used, double avg)
 611 {
 612         double total, ratio = 0.0;
 613         const char *color;
 614
 615         total = avg_stats(&runtime_cycles_stats[cpu]);
 616
 617         if (total)
 618                 ratio = avg / total * 100.0;
 619
 620         color = get_ratio_color(GRC_STALLED_CYCLES_FE, ratio);
 621
 622         fprintf(output, " #  ");
 623         color_fprintf(output, color, "%6.2f%%", ratio);
 624         fprintf(output, " frontend cycles idle   ");
 625 }
 626
 627 static void print_stalled_cycles_backend(int cpu, struct perf_evsel *evsel __used, double avg)
 628 {
 629         double total, ratio = 0.0;
 630         const char *color;
 631
 632         total = avg_stats(&runtime_cycles_stats[cpu]);
 633
 634         if (total)
 635                 ratio = avg / total * 100.0;
 636
 637         color = get_ratio_color(GRC_STALLED_CYCLES_BE, ratio);
 638
 639         fprintf(output, " #  ");
 640         color_fprintf(output, color, "%6.2f%%", ratio);
 641         fprintf(output, " backend  cycles idle   ");
 642 }
 643
 644 static void print_branch_misses(int cpu, struct perf_evsel *evsel __used, double avg)
 645 {
 646         double total, ratio = 0.0;
 647         const char *color;
 648
 649         total = avg_stats(&runtime_branches_stats[cpu]);
 650
 651         if (total)
 652                 ratio = avg / total * 100.0;
 653
 654         color = get_ratio_color(GRC_CACHE_MISSES, ratio);
 655
 656         fprintf(output, " #  ");
 657         color_fprintf(output, color, "%6.2f%%", ratio);
 658         fprintf(output, " of all branches        ");
 659 }
 660
 661 static void print_l1_dcache_misses(int cpu, struct perf_evsel *evsel __used, double avg)
 662 {
 663         double total, ratio = 0.0;
 664         const char *color;
 665
 666         total = avg_stats(&runtime_l1_dcache_stats[cpu]);
 667
 668         if (total)
 669                 ratio = avg / total * 100.0;
 670
 671         color = get_ratio_color(GRC_CACHE_MISSES, ratio);
 672
 673         fprintf(output, " #  ");
 674         color_fprintf(output, color, "%6.2f%%", ratio);
 675         fprintf(output, " of all L1-dcache hits  ");
 676 }
 677
 678 static void print_l1_icache_misses(int cpu, struct perf_evsel *evsel __used, double avg)
 679 {
 680         double total, ratio = 0.0;
 681         const char *color;
 682
 683         total = avg_stats(&runtime_l1_icache_stats[cpu]);
 684
 685         if (total)
 686                 ratio = avg / total * 100.0;
 687
 688         color = get_ratio_color(GRC_CACHE_MISSES, ratio);
 689
 690         fprintf(output, " #  ");
 691         color_fprintf(output, color, "%6.2f%%", ratio);
 692         fprintf(output, " of all L1-icache hits  ");
 693 }
 694
 695 static void print_dtlb_cache_misses(int cpu, struct perf_evsel *evsel __used, double avg)
 696 {
 697         double total, ratio = 0.0;
 698         const char *color;
 699
 700         total = avg_stats(&runtime_dtlb_cache_stats[cpu]);
 701
 702         if (total)
 703                 ratio = avg / total * 100.0;
 704
 705         color = get_ratio_color(GRC_CACHE_MISSES, ratio);
 706
 707         fprintf(output, " #  ");
 708         color_fprintf(output, color, "%6.2f%%", ratio);
 709         fprintf(output, " of all dTLB cache hits ");
 710 }
 711
 712 static void print_itlb_cache_misses(int cpu, struct perf_evsel *evsel __used, double avg)
 713 {
 714         double total, ratio = 0.0;
 715         const char *color;
 716
 717         total = avg_stats(&runtime_itlb_cache_stats[cpu]);
 718
 719         if (total)
 720                 ratio = avg / total * 100.0;
 721
 722         color = get_ratio_color(GRC_CACHE_MISSES, ratio);
 723
 724         fprintf(output, " #  ");
 725         color_fprintf(output, color, "%6.2f%%", ratio);
 726         fprintf(output, " of all iTLB cache hits ");
 727 }
 728
 729 static void print_ll_cache_misses(int cpu, struct perf_evsel *evsel __used, double avg)
 730 {
 731         double total, ratio = 0.0;
 732         const char *color;
 733
 734         total = avg_stats(&runtime_ll_cache_stats[cpu]);
 735
 736         if (total)
 737                 ratio = avg / total * 100.0;
 738
 739         color = get_ratio_color(GRC_CACHE_MISSES, ratio);
 740
 741         fprintf(output, " #  ");
 742         color_fprintf(output, color, "%6.2f%%", ratio);
 743         fprintf(output, " of all LL-cache hits   ");
 744 }
 745
 746 static void abs_printout(int cpu, struct perf_evsel *evsel, double avg)
 747 {
 748         double total, ratio = 0.0;
 749         char cpustr[16] = { '\0', };
 750         const char *fmt;
 751
 752         if (csv_output)
 753                 fmt = "%s%.0f%s%s";
 754         else if (big_num)
 755                 fmt = "%s%'18.0f%s%-25s";
 756         else
 757                 fmt = "%s%18.0f%s%-25s";
 758
 759         if (no_aggr)
 760                 sprintf(cpustr, "CPU%*d%s",
 761                         csv_output ? 0 : -4,
 762                         evsel_list->cpus->map[cpu], csv_sep);
 763         else
 764                 cpu = 0;
 765
 766         fprintf(output, fmt, cpustr, avg, csv_sep, event_name(evsel));
 767
 768         if (evsel->cgrp)
 769                 fprintf(output, "%s%s", csv_sep, evsel->cgrp->name);
 770
 771         if (csv_output)
 772                 return;
 773
 774         if (perf_evsel__match(evsel, HARDWARE, HW_INSTRUCTIONS)) {
 775                 total = avg_stats(&runtime_cycles_stats[cpu]);
 776
 777                 if (total)
 778                         ratio = avg / total;
 779
 780                 fprintf(output, " #   %5.2f  insns per cycle        ", ratio);
 781
 782                 total = avg_stats(&runtime_stalled_cycles_front_stats[cpu]);
 783                 total = max(total, avg_stats(&runtime_stalled_cycles_back_stats[cpu]));
 784
 785                 if (total && avg) {
 786                         ratio = total / avg;
 787                         fprintf(output, "\n                                             #   %5.2f  stalled cycles per insn", ratio);
 788                 }
 789
 790         } else if (perf_evsel__match(evsel, HARDWARE, HW_BRANCH_MISSES) &&
 791                         runtime_branches_stats[cpu].n != 0) {
 792                 print_branch_misses(cpu, evsel, avg);
 793         } else if (
 794                 evsel->attr.type == PERF_TYPE_HW_CACHE &&
 795                 evsel->attr.config ==  ( PERF_COUNT_HW_CACHE_L1D |
 796                                         ((PERF_COUNT_HW_CACHE_OP_READ) << 8) |
 797                                         ((PERF_COUNT_HW_CACHE_RESULT_MISS) << 16)) &&
 798                         runtime_l1_dcache_stats[cpu].n != 0) {
 799                 print_l1_dcache_misses(cpu, evsel, avg);
 800         } else if (
 801                 evsel->attr.type == PERF_TYPE_HW_CACHE &&
 802                 evsel->attr.config ==  ( PERF_COUNT_HW_CACHE_L1I |
 803                                         ((PERF_COUNT_HW_CACHE_OP_READ) << 8) |
 804                                         ((PERF_COUNT_HW_CACHE_RESULT_MISS) << 16)) &&
 805                         runtime_l1_icache_stats[cpu].n != 0) {
 806                 print_l1_icache_misses(cpu, evsel, avg);
 807         } else if (
 808                 evsel->attr.type == PERF_TYPE_HW_CACHE &&
 809                 evsel->attr.config ==  ( PERF_COUNT_HW_CACHE_DTLB |
 810                                         ((PERF_COUNT_HW_CACHE_OP_READ) << 8) |
 811                                         ((PERF_COUNT_HW_CACHE_RESULT_MISS) << 16)) &&
 812                         runtime_dtlb_cache_stats[cpu].n != 0) {
 813                 print_dtlb_cache_misses(cpu, evsel, avg);
 814         } else if (
 815                 evsel->attr.type == PERF_TYPE_HW_CACHE &&
 816                 evsel->attr.config ==  ( PERF_COUNT_HW_CACHE_ITLB |
 817                                         ((PERF_COUNT_HW_CACHE_OP_READ) << 8) |
 818                                         ((PERF_COUNT_HW_CACHE_RESULT_MISS) << 16)) &&
 819                         runtime_itlb_cache_stats[cpu].n != 0) {
 820                 print_itlb_cache_misses(cpu, evsel, avg);
 821         } else if (
 822                 evsel->attr.type == PERF_TYPE_HW_CACHE &&
 823                 evsel->attr.config ==  ( PERF_COUNT_HW_CACHE_LL |
 824                                         ((PERF_COUNT_HW_CACHE_OP_READ) << 8) |
 825                                         ((PERF_COUNT_HW_CACHE_RESULT_MISS) << 16)) &&
 826                         runtime_ll_cache_stats[cpu].n != 0) {
 827                 print_ll_cache_misses(cpu, evsel, avg);
 828         } else if (perf_evsel__match(evsel, HARDWARE, HW_CACHE_MISSES) &&
 829                         runtime_cacherefs_stats[cpu].n != 0) {
 830                 total = avg_stats(&runtime_cacherefs_stats[cpu]);
 831
 832                 if (total)
 833                         ratio = avg * 100 / total;
 834
 835                 fprintf(output, " # %8.3f %% of all cache refs    ", ratio);
 836
 837         } else if (perf_evsel__match(evsel, HARDWARE, HW_STALLED_CYCLES_FRONTEND)) {
 838                 print_stalled_cycles_frontend(cpu, evsel, avg);
 839         } else if (perf_evsel__match(evsel, HARDWARE, HW_STALLED_CYCLES_BACKEND)) {
 840                 print_stalled_cycles_backend(cpu, evsel, avg);
 841         } else if (perf_evsel__match(evsel, HARDWARE, HW_CPU_CYCLES)) {
 842                 total = avg_stats(&runtime_nsecs_stats[cpu]);
 843
 844                 if (total)
 845                         ratio = 1.0 * avg / total;
 846
 847                 fprintf(output, " # %8.3f GHz                    ", ratio);
 848         } else if (runtime_nsecs_stats[cpu].n != 0) {
 849                 char unit = 'M';
 850
 851                 total = avg_stats(&runtime_nsecs_stats[cpu]);
 852
 853                 if (total)
 854                         ratio = 1000.0 * avg / total;
 855                 if (ratio < 0.001) {
 856                         ratio *= 1000;
 857                         unit = 'K';
 858                 }
 859
 860                 fprintf(output, " # %8.3f %c/sec                  ", ratio, unit);
 861         } else {
 862                 fprintf(output, "                                   ");
 863         }
 864 }
 865
 866 /*
 867  * Print out the results of a single counter:
 868  * aggregated counts in system-wide mode
 869  */
 870 static void print_counter_aggr(struct perf_evsel *counter)
 871 {
 872         struct perf_stat *ps = counter->priv;
 873         double avg = avg_stats(&ps->res_stats[0]);
 874         int scaled = counter->counts->scaled;
 875
 876         if (scaled == -1) {
 877                 fprintf(output, "%*s%s%*s",
 878                         csv_output ? 0 : 18,
 879                         counter->supported ? CNTR_NOT_COUNTED : CNTR_NOT_SUPPORTED,
 880                         csv_sep,
 881                         csv_output ? 0 : -24,
 882                         event_name(counter));
 883
 884                 if (counter->cgrp)
 885                         fprintf(output, "%s%s", csv_sep, counter->cgrp->name);
 886
 887                 fputc('\n', output);
 888                 return;
 889         }
 890
 891         if (nsec_counter(counter))
 892                 nsec_printout(-1, counter, avg);
 893         else
 894                 abs_printout(-1, counter, avg);
 895
 896         print_noise(counter, avg);
 897
 898         if (csv_output) {
 899                 fputc('\n', output);
 900                 return;
 901         }
 902
 903         if (scaled) {
 904                 double avg_enabled, avg_running;
 905
 906                 avg_enabled = avg_stats(&ps->res_stats[1]);
 907                 avg_running = avg_stats(&ps->res_stats[2]);
 908
 909                 fprintf(output, " [%5.2f%%]", 100 * avg_running / avg_enabled);
 910         }
 911         fprintf(output, "\n");
 912 }
 913
 914 /*
 915  * Print out the results of a single counter:
 916  * does not use aggregated count in system-wide
 917  */
 918 static void print_counter(struct perf_evsel *counter)
 919 {
 920         u64 ena, run, val;
 921         int cpu;
 922
 923         for (cpu = 0; cpu < evsel_list->cpus->nr; cpu++) {
 924                 val = counter->counts->cpu[cpu].val;
 925                 ena = counter->counts->cpu[cpu].ena;
 926                 run = counter->counts->cpu[cpu].run;
 927                 if (run == 0 || ena == 0) {
 928                         fprintf(output, "CPU%*d%s%*s%s%*s",
 929                                 csv_output ? 0 : -4,
 930                                 evsel_list->cpus->map[cpu], csv_sep,
 931                                 csv_output ? 0 : 18,
 932                                 counter->supported ? CNTR_NOT_COUNTED : CNTR_NOT_SUPPORTED,
 933                                 csv_sep,
 934                                 csv_output ? 0 : -24,
 935                                 event_name(counter));
 936
 937                         if (counter->cgrp)
 938                                 fprintf(output, "%s%s",
 939                                         csv_sep, counter->cgrp->name);
 940
 941                         fputc('\n', output);
 942                         continue;
 943                 }
 944
 945                 if (nsec_counter(counter))
 946                         nsec_printout(cpu, counter, val);
 947                 else
 948                         abs_printout(cpu, counter, val);
 949
 950                 if (!csv_output) {
 951                         print_noise(counter, 1.0);
 952
 953                         if (run != ena)
 954                                 fprintf(output, "  (%.2f%%)",
 955                                         100.0 * run / ena);
 956                 }
 957                 fputc('\n', output);
 958         }
 959 }
 960
 961 static void print_stat(int argc, const char **argv)
 962 {
 963         struct perf_evsel *counter;
 964         int i;
 965
 966         fflush(stdout);
 967
 968         if (!csv_output) {
 969                 fprintf(output, "\n");
 970                 fprintf(output, " Performance counter stats for ");
 971                 if (!target_pid && !target_tid) {
 972                         fprintf(output, "\'%s", argv[0]);
 973                         for (i = 1; i < argc; i++)
 974                                 fprintf(output, " %s", argv[i]);
 975                 } else if (target_pid)
 976                         fprintf(output, "process id \'%s", target_pid);
 977                 else
 978                         fprintf(output, "thread id \'%s", target_tid);
 979
 980                 fprintf(output, "\'");
 981                 if (run_count > 1)
 982                         fprintf(output, " (%d runs)", run_count);
 983                 fprintf(output, ":\n\n");
 984         }
 985
 986         if (no_aggr) {
 987                 list_for_each_entry(counter, &evsel_list->entries, node)
 988                         print_counter(counter);
 989         } else {
 990                 list_for_each_entry(counter, &evsel_list->entries, node)
 991                         print_counter_aggr(counter);
 992         }
 993
 994         if (!csv_output) {
 995                 if (!null_run)
 996                         fprintf(output, "\n");
 997                 fprintf(output, " %17.9f seconds time elapsed",
 998                                 avg_stats(&walltime_nsecs_stats)/1e9);
 999                 if (run_count > 1) {
1000                         fprintf(output, "                                        ");
1001                         print_noise_pct(stddev_stats(&walltime_nsecs_stats),
1002                                         avg_stats(&walltime_nsecs_stats));
1003                 }
1004                 fprintf(output, "\n\n");
1005         }
1006 }
1007
1008 static volatile int signr = -1;
1009
1010 static void skip_signal(int signo)
1011 {
1012         if(child_pid == -1)
1013                 done = 1;
1014
1015         signr = signo;
1016 }
1017
1018 static void sig_atexit(void)
1019 {
1020         if (child_pid != -1)
1021                 kill(child_pid, SIGTERM);
1022
1023         if (signr == -1)
1024                 return;
1025
1026         signal(signr, SIG_DFL);
1027         kill(getpid(), signr);
1028 }
1029
1030 static const char * const stat_usage[] = {
1031         "perf stat [<options>] [<command>]",
1032         NULL
1033 };
1034
1035 static int stat__set_big_num(const struct option *opt __used,
1036                              const char *s __used, int unset)
1037 {
1038         big_num_opt = unset ? 0 : 1;
1039         return 0;
1040 }
1041
1042 static bool append_file;
1043
1044 static const struct option options[] = {
1045         OPT_CALLBACK('e', "event", &evsel_list, "event",
1046                      "event selector. use 'perf list' to list available events",
1047                      parse_events_option),
1048         OPT_CALLBACK(0, "filter", &evsel_list, "filter",
1049                      "event filter", parse_filter),
1050         OPT_BOOLEAN('i', "no-inherit", &no_inherit,
1051                     "child tasks do not inherit counters"),
1052         OPT_STRING('p', "pid", &target_pid, "pid",
1053                    "stat events on existing process id"),
1054         OPT_STRING('t', "tid", &target_tid, "tid",
1055                    "stat events on existing thread id"),
1056         OPT_BOOLEAN('a', "all-cpus", &system_wide,
1057                     "system-wide collection from all CPUs"),
1058         OPT_BOOLEAN('g', "group", &group,
1059                     "put the counters into a counter group"),
1060         OPT_BOOLEAN('c', "scale", &scale,
1061                     "scale/normalize counters"),
1062         OPT_INCR('v', "verbose", &verbose,
1063                     "be more verbose (show counter open errors, etc)"),
1064         OPT_INTEGER('r', "repeat", &run_count,
1065                     "repeat command and print average + stddev (max: 100)"),
1066         OPT_BOOLEAN('n', "null", &null_run,
1067                     "null run - dont start any counters"),
1068         OPT_INCR('d', "detailed", &detailed_run,
1069                     "detailed run - start a lot of events"),
1070         OPT_BOOLEAN('S', "sync", &sync_run,
1071                     "call sync() before starting a run"),
1072         OPT_CALLBACK_NOOPT('B', "big-num", NULL, NULL,
1073                            "print large numbers with thousands\' separators",
1074                            stat__set_big_num),
1075         OPT_STRING('C', "cpu", &cpu_list, "cpu",
1076                     "list of cpus to monitor in system-wide"),
1077         OPT_BOOLEAN('A', "no-aggr", &no_aggr,
1078                     "disable CPU count aggregation"),
1079         OPT_STRING('x', "field-separator", &csv_sep, "separator",
1080                    "print counts with custom separator"),
1081         OPT_CALLBACK('G', "cgroup", &evsel_list, "name",
1082                      "monitor event in cgroup name only",
1083                      parse_cgroups),
1084         OPT_STRING('o', "output", &output_name, "file",
1085                     "output file name"),
1086         OPT_BOOLEAN(0, "append", &append_file, "append to the output file"),
1087         OPT_INTEGER(0, "log-fd", &output_fd,
1088                     "log output to fd, instead of stderr"),
1089         OPT_END()
1090 };
1091
1092 /*
1093  * Add default attributes, if there were no attributes specified or
1094  * if -d/--detailed, -d -d or -d -d -d is used:
1095  */
1096 static int add_default_attributes(void)
1097 {
1098         /* Set attrs if no event is selected and !null_run: */
1099         if (null_run)
1100                 return 0;
1101
1102         if (!evsel_list->nr_entries) {
1103                 if (perf_evlist__add_attrs_array(evsel_list, default_attrs) < 0)
1104                         return -1;
1105         }
1106
1107         /* Detailed events get appended to the event list: */
1108
1109         if (detailed_run <  1)
1110                 return 0;
1111
1112         /* Append detailed run extra attributes: */
1113         if (perf_evlist__add_attrs_array(evsel_list, detailed_attrs) < 0)
1114                 return -1;
1115
1116         if (detailed_run < 2)
1117                 return 0;
1118
1119         /* Append very detailed run extra attributes: */
1120         if (perf_evlist__add_attrs_array(evsel_list, very_detailed_attrs) < 0)
1121                 return -1;
1122
1123         if (detailed_run < 3)
1124                 return 0;
1125
1126         /* Append very, very detailed run extra attributes: */
1127         return perf_evlist__add_attrs_array(evsel_list, very_very_detailed_attrs);
1128 }
1129
1130 int cmd_stat(int argc, const char **argv, const char *prefix __used)
1131 {
1132         struct perf_evsel *pos;
1133         int status = -ENOMEM;
1134         const char *mode;
1135
1136         setlocale(LC_ALL, "");
1137
1138         evsel_list = perf_evlist__new(NULL, NULL);
1139         if (evsel_list == NULL)
1140                 return -ENOMEM;
1141
1142         argc = parse_options(argc, argv, options, stat_usage,
1143                 PARSE_OPT_STOP_AT_NON_OPTION);
1144
1145         output = stderr;
1146         if (output_name && strcmp(output_name, "-"))
1147                 output = NULL;
1148
1149         if (output_name && output_fd) {
1150                 fprintf(stderr, "cannot use both --output and --log-fd\n");
1151                 usage_with_options(stat_usage, options);
1152         }
1153         if (!output) {
1154                 struct timespec tm;
1155                 mode = append_file ? "a" : "w";
1156
1157                 output = fopen(output_name, mode);
1158                 if (!output) {
1159                         perror("failed to create output file");
1160                         exit(-1);
1161                 }
1162                 clock_gettime(CLOCK_REALTIME, &tm);
1163                 fprintf(output, "# started on %s\n", ctime(&tm.tv_sec));
1164         } else if (output_fd != 2) {
1165                 mode = append_file ? "a" : "w";
1166                 output = fdopen(output_fd, mode);
1167                 if (!output) {
1168                         perror("Failed opening logfd");
1169                         return -errno;
1170                 }
1171         }
1172
1173         if (csv_sep) {
1174                 csv_output = true;
1175                 if (!strcmp(csv_sep, "\\t"))
1176                         csv_sep = "\t";
1177         } else
1178                 csv_sep = DEFAULT_SEPARATOR;
1179
1180         /*
1181          * let the spreadsheet do the pretty-printing
1182          */
1183         if (csv_output) {
1184                 /* User explicitly passed -B? */
1185                 if (big_num_opt == 1) {
1186                         fprintf(stderr, "-B option not supported with -x\n");
1187                         usage_with_options(stat_usage, options);
1188                 } else /* Nope, so disable big number formatting */
1189                         big_num = false;
1190         } else if (big_num_opt == 0) /* User passed --no-big-num */
1191                 big_num = false;
1192
1193         if (!argc && !target_pid && !target_tid)
1194                 usage_with_options(stat_usage, options);
1195         if (run_count <= 0)
1196                 usage_with_options(stat_usage, options);
1197
1198         /* no_aggr, cgroup are for system-wide only */
1199         if ((no_aggr || nr_cgroups) && !system_wide) {
1200                 fprintf(stderr, "both cgroup and no-aggregation "
1201                         "modes only available in system-wide mode\n");
1202
1203                 usage_with_options(stat_usage, options);
1204         }
1205
1206         if (add_default_attributes())
1207                 goto out;
1208
1209         if (target_pid)
1210                 target_tid = target_pid;
1211
1212         evsel_list->threads = thread_map__new_str(target_pid,
1213                                                   target_tid, UINT_MAX);
1214         if (evsel_list->threads == NULL) {
1215                 pr_err("Problems finding threads of monitor\n");
1216                 usage_with_options(stat_usage, options);
1217         }
1218
1219         if (system_wide)
1220                 evsel_list->cpus = cpu_map__new(cpu_list);
1221         else
1222                 evsel_list->cpus = cpu_map__dummy_new();
1223
1224         if (evsel_list->cpus == NULL) {
1225                 perror("failed to parse CPUs map");
1226                 usage_with_options(stat_usage, options);
1227                 return -1;
1228         }
1229
1230         list_for_each_entry(pos, &evsel_list->entries, node) {
1231                 if (perf_evsel__alloc_stat_priv(pos) < 0 ||
1232                     perf_evsel__alloc_counts(pos, evsel_list->cpus->nr) < 0)
1233                         goto out_free_fd;
1234         }
1235
1236         /*
1237          * We dont want to block the signals - that would cause
1238          * child tasks to inherit that and Ctrl-C would not work.
1239          * What we want is for Ctrl-C to work in the exec()-ed
1240          * task, but being ignored by perf stat itself:
1241          */
1242         atexit(sig_atexit);
1243         signal(SIGINT,  skip_signal);
1244         signal(SIGALRM, skip_signal);
1245         signal(SIGABRT, skip_signal);
1246
1247         status = 0;
1248         for (run_idx = 0; run_idx < run_count; run_idx++) {
1249                 if (run_count != 1 && verbose)
1250                         fprintf(output, "[ perf stat: executing run #%d ... ]\n",
1251                                 run_idx + 1);
1252
1253                 if (sync_run)
1254                         sync();
1255
1256                 status = run_perf_stat(argc, argv);
1257         }
1258
1259         if (status != -1)
1260                 print_stat(argc, argv);
1261 out_free_fd:
1262         list_for_each_entry(pos, &evsel_list->entries, node)
1263                 perf_evsel__free_stat_priv(pos);
1264         perf_evlist__delete_maps(evsel_list);
1265 out:
1266         perf_evlist__delete(evsel_list);
1267         return status;
1268 }