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 static struct perf_evlist       *evsel_list;
 177
 178 static struct perf_target       target = {
 179         .uid    = UINT_MAX,
 180 };
 181
 182 static int                      run_idx                         =  0;
 183 static int                      run_count                       =  1;
 184 static bool                     no_inherit                      = false;
 185 static bool                     scale                           =  true;
 186 static bool                     no_aggr                         = false;
 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               *csv_sep                        = NULL;
 194 static bool                     csv_output                      = false;
 195 static bool                     group                           = false;
 196 static const char               *output_name                    = NULL;
 197 static FILE                     *output                         = NULL;
 198 static int                      output_fd;
 199
 200 static volatile int done = 0;
 201
 202 struct stats
 203 {
 204         double n, mean, M2;
 205 };
 206
 207 struct perf_stat {
 208         struct stats      res_stats[3];
 209 };
 210
 211 static int perf_evsel__alloc_stat_priv(struct perf_evsel *evsel)
 212 {
 213         evsel->priv = zalloc(sizeof(struct perf_stat));
 214         return evsel->priv == NULL ? -ENOMEM : 0;
 215 }
 216
 217 static void perf_evsel__free_stat_priv(struct perf_evsel *evsel)
 218 {
 219         free(evsel->priv);
 220         evsel->priv = NULL;
 221 }
 222
 223 static void update_stats(struct stats *stats, u64 val)
 224 {
 225         double delta;
 226
 227         stats->n++;
 228         delta = val - stats->mean;
 229         stats->mean += delta / stats->n;
 230         stats->M2 += delta*(val - stats->mean);
 231 }
 232
 233 static double avg_stats(struct stats *stats)
 234 {
 235         return stats->mean;
 236 }
 237
 238 /*
 239  * http://en.wikipedia.org/wiki/Algorithms_for_calculating_variance
 240  *
 241  *       (\Sum n_i^2) - ((\Sum n_i)^2)/n
 242  * s^2 = -------------------------------
 243  *                  n - 1
 244  *
 245  * http://en.wikipedia.org/wiki/Stddev
 246  *
 247  * The std dev of the mean is related to the std dev by:
 248  *
 249  *             s
 250  * s_mean = -------
 251  *          sqrt(n)
 252  *
 253  */
 254 static double stddev_stats(struct stats *stats)
 255 {
 256         double variance, variance_mean;
 257
 258         if (!stats->n)
 259                 return 0.0;
 260
 261         variance = stats->M2 / (stats->n - 1);
 262         variance_mean = variance / stats->n;
 263
 264         return sqrt(variance_mean);
 265 }
 266
 267 static struct stats runtime_nsecs_stats[MAX_NR_CPUS];
 268 static struct stats runtime_cycles_stats[MAX_NR_CPUS];
 269 static struct stats runtime_stalled_cycles_front_stats[MAX_NR_CPUS];
 270 static struct stats runtime_stalled_cycles_back_stats[MAX_NR_CPUS];
 271 static struct stats runtime_branches_stats[MAX_NR_CPUS];
 272 static struct stats runtime_cacherefs_stats[MAX_NR_CPUS];
 273 static struct stats runtime_l1_dcache_stats[MAX_NR_CPUS];
 274 static struct stats runtime_l1_icache_stats[MAX_NR_CPUS];
 275 static struct stats runtime_ll_cache_stats[MAX_NR_CPUS];
 276 static struct stats runtime_itlb_cache_stats[MAX_NR_CPUS];
 277 static struct stats runtime_dtlb_cache_stats[MAX_NR_CPUS];
 278 static struct stats walltime_nsecs_stats;
 279
 280 static int create_perf_stat_counter(struct perf_evsel *evsel,
 281                                     struct perf_evsel *first)
 282 {
 283         struct perf_event_attr *attr = &evsel->attr;
 284         struct xyarray *group_fd = NULL;
 285         bool exclude_guest_missing = false;
 286         int ret;
 287
 288         if (group && evsel != first)
 289                 group_fd = first->fd;
 290
 291         if (scale)
 292                 attr->read_format = PERF_FORMAT_TOTAL_TIME_ENABLED |
 293                                     PERF_FORMAT_TOTAL_TIME_RUNNING;
 294
 295         attr->inherit = !no_inherit;
 296
 297 retry:
 298         if (exclude_guest_missing)
 299                 evsel->attr.exclude_guest = evsel->attr.exclude_host = 0;
 300
 301         if (perf_target__has_cpu(&target)) {
 302                 ret = perf_evsel__open_per_cpu(evsel, evsel_list->cpus,
 303                                                group, group_fd);
 304                 if (ret)
 305                         goto check_ret;
 306                 return 0;
 307         }
 308
 309         if (!perf_target__has_task(&target) && (!group || evsel == first)) {
 310                 attr->disabled = 1;
 311                 attr->enable_on_exec = 1;
 312         }
 313
 314         ret = perf_evsel__open_per_thread(evsel, evsel_list->threads,
 315                                           group, group_fd);
 316         if (!ret)
 317                 return 0;
 318         /* fall through */
 319 check_ret:
 320         if (ret && errno == EINVAL) {
 321                 if (!exclude_guest_missing &&
 322                     (evsel->attr.exclude_guest || evsel->attr.exclude_host)) {
 323                         pr_debug("Old kernel, cannot exclude "
 324                                  "guest or host samples.\n");
 325                         exclude_guest_missing = true;
 326                         goto retry;
 327                 }
 328         }
 329         return ret;
 330 }
 331
 332 /*
 333  * Does the counter have nsecs as a unit?
 334  */
 335 static inline int nsec_counter(struct perf_evsel *evsel)
 336 {
 337         if (perf_evsel__match(evsel, SOFTWARE, SW_CPU_CLOCK) ||
 338             perf_evsel__match(evsel, SOFTWARE, SW_TASK_CLOCK))
 339                 return 1;
 340
 341         return 0;
 342 }
 343
 344 /*
 345  * Update various tracking values we maintain to print
 346  * more semantic information such as miss/hit ratios,
 347  * instruction rates, etc:
 348  */
 349 static void update_shadow_stats(struct perf_evsel *counter, u64 *count)
 350 {
 351         if (perf_evsel__match(counter, SOFTWARE, SW_TASK_CLOCK))
 352                 update_stats(&runtime_nsecs_stats[0], count[0]);
 353         else if (perf_evsel__match(counter, HARDWARE, HW_CPU_CYCLES))
 354                 update_stats(&runtime_cycles_stats[0], count[0]);
 355         else if (perf_evsel__match(counter, HARDWARE, HW_STALLED_CYCLES_FRONTEND))
 356                 update_stats(&runtime_stalled_cycles_front_stats[0], count[0]);
 357         else if (perf_evsel__match(counter, HARDWARE, HW_STALLED_CYCLES_BACKEND))
 358                 update_stats(&runtime_stalled_cycles_back_stats[0], count[0]);
 359         else if (perf_evsel__match(counter, HARDWARE, HW_BRANCH_INSTRUCTIONS))
 360                 update_stats(&runtime_branches_stats[0], count[0]);
 361         else if (perf_evsel__match(counter, HARDWARE, HW_CACHE_REFERENCES))
 362                 update_stats(&runtime_cacherefs_stats[0], count[0]);
 363         else if (perf_evsel__match(counter, HW_CACHE, HW_CACHE_L1D))
 364                 update_stats(&runtime_l1_dcache_stats[0], count[0]);
 365         else if (perf_evsel__match(counter, HW_CACHE, HW_CACHE_L1I))
 366                 update_stats(&runtime_l1_icache_stats[0], count[0]);
 367         else if (perf_evsel__match(counter, HW_CACHE, HW_CACHE_LL))
 368                 update_stats(&runtime_ll_cache_stats[0], count[0]);
 369         else if (perf_evsel__match(counter, HW_CACHE, HW_CACHE_DTLB))
 370                 update_stats(&runtime_dtlb_cache_stats[0], count[0]);
 371         else if (perf_evsel__match(counter, HW_CACHE, HW_CACHE_ITLB))
 372                 update_stats(&runtime_itlb_cache_stats[0], count[0]);
 373 }
 374
 375 /*
 376  * Read out the results of a single counter:
 377  * aggregate counts across CPUs in system-wide mode
 378  */
 379 static int read_counter_aggr(struct perf_evsel *counter)
 380 {
 381         struct perf_stat *ps = counter->priv;
 382         u64 *count = counter->counts->aggr.values;
 383         int i;
 384
 385         if (__perf_evsel__read(counter, evsel_list->cpus->nr,
 386                                evsel_list->threads->nr, scale) < 0)
 387                 return -1;
 388
 389         for (i = 0; i < 3; i++)
 390                 update_stats(&ps->res_stats[i], count[i]);
 391
 392         if (verbose) {
 393                 fprintf(output, "%s: %" PRIu64 " %" PRIu64 " %" PRIu64 "\n",
 394                         perf_evsel__name(counter), count[0], count[1], count[2]);
 395         }
 396
 397         /*
 398          * Save the full runtime - to allow normalization during printout:
 399          */
 400         update_shadow_stats(counter, count);
 401
 402         return 0;
 403 }
 404
 405 /*
 406  * Read out the results of a single counter:
 407  * do not aggregate counts across CPUs in system-wide mode
 408  */
 409 static int read_counter(struct perf_evsel *counter)
 410 {
 411         u64 *count;
 412         int cpu;
 413
 414         for (cpu = 0; cpu < evsel_list->cpus->nr; cpu++) {
 415                 if (__perf_evsel__read_on_cpu(counter, cpu, 0, scale) < 0)
 416                         return -1;
 417
 418                 count = counter->counts->cpu[cpu].values;
 419
 420                 update_shadow_stats(counter, count);
 421         }
 422
 423         return 0;
 424 }
 425
 426 static int run_perf_stat(int argc __used, const char **argv)
 427 {
 428         unsigned long long t0, t1;
 429         struct perf_evsel *counter, *first;
 430         int status = 0;
 431         int child_ready_pipe[2], go_pipe[2];
 432         const bool forks = (argc > 0);
 433         char buf;
 434
 435         if (forks && (pipe(child_ready_pipe) < 0 || pipe(go_pipe) < 0)) {
 436                 perror("failed to create pipes");
 437                 exit(1);
 438         }
 439
 440         if (forks) {
 441                 if ((child_pid = fork()) < 0)
 442                         perror("failed to fork");
 443
 444                 if (!child_pid) {
 445                         close(child_ready_pipe[0]);
 446                         close(go_pipe[1]);
 447                         fcntl(go_pipe[0], F_SETFD, FD_CLOEXEC);
 448
 449                         /*
 450                          * Do a dummy execvp to get the PLT entry resolved,
 451                          * so we avoid the resolver overhead on the real
 452                          * execvp call.
 453                          */
 454                         execvp("", (char **)argv);
 455
 456                         /*
 457                          * Tell the parent we're ready to go
 458                          */
 459                         close(child_ready_pipe[1]);
 460
 461                         /*
 462                          * Wait until the parent tells us to go.
 463                          */
 464                         if (read(go_pipe[0], &buf, 1) == -1)
 465                                 perror("unable to read pipe");
 466
 467                         execvp(argv[0], (char **)argv);
 468
 469                         perror(argv[0]);
 470                         exit(-1);
 471                 }
 472
 473                 if (perf_target__none(&target))
 474                         evsel_list->threads->map[0] = child_pid;
 475
 476                 /*
 477                  * Wait for the child to be ready to exec.
 478                  */
 479                 close(child_ready_pipe[1]);
 480                 close(go_pipe[0]);
 481                 if (read(child_ready_pipe[0], &buf, 1) == -1)
 482                         perror("unable to read pipe");
 483                 close(child_ready_pipe[0]);
 484         }
 485
 486         first = list_entry(evsel_list->entries.next, struct perf_evsel, node);
 487
 488         list_for_each_entry(counter, &evsel_list->entries, node) {
 489                 if (create_perf_stat_counter(counter, first) < 0) {
 490                         /*
 491                          * PPC returns ENXIO for HW counters until 2.6.37
 492                          * (behavior changed with commit b0a873e).
 493                          */
 494                         if (errno == EINVAL || errno == ENOSYS ||
 495                             errno == ENOENT || errno == EOPNOTSUPP ||
 496                             errno == ENXIO) {
 497                                 if (verbose)
 498                                         ui__warning("%s event is not supported by the kernel.\n",
 499                                                     perf_evsel__name(counter));
 500                                 counter->supported = false;
 501                                 continue;
 502                         }
 503
 504                         if (errno == EPERM || errno == EACCES) {
 505                                 error("You may not have permission to collect %sstats.\n"
 506                                       "\t Consider tweaking"
 507                                       " /proc/sys/kernel/perf_event_paranoid or running as root.",
 508                                       target.system_wide ? "system-wide " : "");
 509                         } else {
 510                                 error("open_counter returned with %d (%s). "
 511                                       "/bin/dmesg may provide additional information.\n",
 512                                        errno, strerror(errno));
 513                         }
 514                         if (child_pid != -1)
 515                                 kill(child_pid, SIGTERM);
 516                         die("Not all events could be opened.\n");
 517                         return -1;
 518                 }
 519                 counter->supported = true;
 520         }
 521
 522         if (perf_evlist__set_filters(evsel_list)) {
 523                 error("failed to set filter with %d (%s)\n", errno,
 524                         strerror(errno));
 525                 return -1;
 526         }
 527
 528         /*
 529          * Enable counters and exec the command:
 530          */
 531         t0 = rdclock();
 532
 533         if (forks) {
 534                 close(go_pipe[1]);
 535                 wait(&status);
 536                 if (WIFSIGNALED(status))
 537                         psignal(WTERMSIG(status), argv[0]);
 538         } else {
 539                 while(!done) sleep(1);
 540         }
 541
 542         t1 = rdclock();
 543
 544         update_stats(&walltime_nsecs_stats, t1 - t0);
 545
 546         if (no_aggr) {
 547                 list_for_each_entry(counter, &evsel_list->entries, node) {
 548                         read_counter(counter);
 549                         perf_evsel__close_fd(counter, evsel_list->cpus->nr, 1);
 550                 }
 551         } else {
 552                 list_for_each_entry(counter, &evsel_list->entries, node) {
 553                         read_counter_aggr(counter);
 554                         perf_evsel__close_fd(counter, evsel_list->cpus->nr,
 555                                              evsel_list->threads->nr);
 556                 }
 557         }
 558
 559         return WEXITSTATUS(status);
 560 }
 561
 562 static void print_noise_pct(double total, double avg)
 563 {
 564         double pct = 0.0;
 565
 566         if (avg)
 567                 pct = 100.0*total/avg;
 568
 569         if (csv_output)
 570                 fprintf(output, "%s%.2f%%", csv_sep, pct);
 571         else if (pct)
 572                 fprintf(output, "  ( +-%6.2f%% )", pct);
 573 }
 574
 575 static void print_noise(struct perf_evsel *evsel, double avg)
 576 {
 577         struct perf_stat *ps;
 578
 579         if (run_count == 1)
 580                 return;
 581
 582         ps = evsel->priv;
 583         print_noise_pct(stddev_stats(&ps->res_stats[0]), avg);
 584 }
 585
 586 static void nsec_printout(int cpu, struct perf_evsel *evsel, double avg)
 587 {
 588         double msecs = avg / 1e6;
 589         char cpustr[16] = { '\0', };
 590         const char *fmt = csv_output ? "%s%.6f%s%s" : "%s%18.6f%s%-25s";
 591
 592         if (no_aggr)
 593                 sprintf(cpustr, "CPU%*d%s",
 594                         csv_output ? 0 : -4,
 595                         evsel_list->cpus->map[cpu], csv_sep);
 596
 597         fprintf(output, fmt, cpustr, msecs, csv_sep, perf_evsel__name(evsel));
 598
 599         if (evsel->cgrp)
 600                 fprintf(output, "%s%s", csv_sep, evsel->cgrp->name);
 601
 602         if (csv_output)
 603                 return;
 604
 605         if (perf_evsel__match(evsel, SOFTWARE, SW_TASK_CLOCK))
 606                 fprintf(output, " # %8.3f CPUs utilized          ",
 607                         avg / avg_stats(&walltime_nsecs_stats));
 608         else
 609                 fprintf(output, "                                   ");
 610 }
 611
 612 /* used for get_ratio_color() */
 613 enum grc_type {
 614         GRC_STALLED_CYCLES_FE,
 615         GRC_STALLED_CYCLES_BE,
 616         GRC_CACHE_MISSES,
 617         GRC_MAX_NR
 618 };
 619
 620 static const char *get_ratio_color(enum grc_type type, double ratio)
 621 {
 622         static const double grc_table[GRC_MAX_NR][3] = {
 623                 [GRC_STALLED_CYCLES_FE] = { 50.0, 30.0, 10.0 },
 624                 [GRC_STALLED_CYCLES_BE] = { 75.0, 50.0, 20.0 },
 625                 [GRC_CACHE_MISSES]      = { 20.0, 10.0, 5.0 },
 626         };
 627         const char *color = PERF_COLOR_NORMAL;
 628
 629         if (ratio > grc_table[type][0])
 630                 color = PERF_COLOR_RED;
 631         else if (ratio > grc_table[type][1])
 632                 color = PERF_COLOR_MAGENTA;
 633         else if (ratio > grc_table[type][2])
 634                 color = PERF_COLOR_YELLOW;
 635
 636         return color;
 637 }
 638
 639 static void print_stalled_cycles_frontend(int cpu, struct perf_evsel *evsel __used, double avg)
 640 {
 641         double total, ratio = 0.0;
 642         const char *color;
 643
 644         total = avg_stats(&runtime_cycles_stats[cpu]);
 645
 646         if (total)
 647                 ratio = avg / total * 100.0;
 648
 649         color = get_ratio_color(GRC_STALLED_CYCLES_FE, ratio);
 650
 651         fprintf(output, " #  ");
 652         color_fprintf(output, color, "%6.2f%%", ratio);
 653         fprintf(output, " frontend cycles idle   ");
 654 }
 655
 656 static void print_stalled_cycles_backend(int cpu, struct perf_evsel *evsel __used, double avg)
 657 {
 658         double total, ratio = 0.0;
 659         const char *color;
 660
 661         total = avg_stats(&runtime_cycles_stats[cpu]);
 662
 663         if (total)
 664                 ratio = avg / total * 100.0;
 665
 666         color = get_ratio_color(GRC_STALLED_CYCLES_BE, ratio);
 667
 668         fprintf(output, " #  ");
 669         color_fprintf(output, color, "%6.2f%%", ratio);
 670         fprintf(output, " backend  cycles idle   ");
 671 }
 672
 673 static void print_branch_misses(int cpu, struct perf_evsel *evsel __used, double avg)
 674 {
 675         double total, ratio = 0.0;
 676         const char *color;
 677
 678         total = avg_stats(&runtime_branches_stats[cpu]);
 679
 680         if (total)
 681                 ratio = avg / total * 100.0;
 682
 683         color = get_ratio_color(GRC_CACHE_MISSES, ratio);
 684
 685         fprintf(output, " #  ");
 686         color_fprintf(output, color, "%6.2f%%", ratio);
 687         fprintf(output, " of all branches        ");
 688 }
 689
 690 static void print_l1_dcache_misses(int cpu, struct perf_evsel *evsel __used, double avg)
 691 {
 692         double total, ratio = 0.0;
 693         const char *color;
 694
 695         total = avg_stats(&runtime_l1_dcache_stats[cpu]);
 696
 697         if (total)
 698                 ratio = avg / total * 100.0;
 699
 700         color = get_ratio_color(GRC_CACHE_MISSES, ratio);
 701
 702         fprintf(output, " #  ");
 703         color_fprintf(output, color, "%6.2f%%", ratio);
 704         fprintf(output, " of all L1-dcache hits  ");
 705 }
 706
 707 static void print_l1_icache_misses(int cpu, struct perf_evsel *evsel __used, double avg)
 708 {
 709         double total, ratio = 0.0;
 710         const char *color;
 711
 712         total = avg_stats(&runtime_l1_icache_stats[cpu]);
 713
 714         if (total)
 715                 ratio = avg / total * 100.0;
 716
 717         color = get_ratio_color(GRC_CACHE_MISSES, ratio);
 718
 719         fprintf(output, " #  ");
 720         color_fprintf(output, color, "%6.2f%%", ratio);
 721         fprintf(output, " of all L1-icache hits  ");
 722 }
 723
 724 static void print_dtlb_cache_misses(int cpu, struct perf_evsel *evsel __used, double avg)
 725 {
 726         double total, ratio = 0.0;
 727         const char *color;
 728
 729         total = avg_stats(&runtime_dtlb_cache_stats[cpu]);
 730
 731         if (total)
 732                 ratio = avg / total * 100.0;
 733
 734         color = get_ratio_color(GRC_CACHE_MISSES, ratio);
 735
 736         fprintf(output, " #  ");
 737         color_fprintf(output, color, "%6.2f%%", ratio);
 738         fprintf(output, " of all dTLB cache hits ");
 739 }
 740
 741 static void print_itlb_cache_misses(int cpu, struct perf_evsel *evsel __used, double avg)
 742 {
 743         double total, ratio = 0.0;
 744         const char *color;
 745
 746         total = avg_stats(&runtime_itlb_cache_stats[cpu]);
 747
 748         if (total)
 749                 ratio = avg / total * 100.0;
 750
 751         color = get_ratio_color(GRC_CACHE_MISSES, ratio);
 752
 753         fprintf(output, " #  ");
 754         color_fprintf(output, color, "%6.2f%%", ratio);
 755         fprintf(output, " of all iTLB cache hits ");
 756 }
 757
 758 static void print_ll_cache_misses(int cpu, struct perf_evsel *evsel __used, double avg)
 759 {
 760         double total, ratio = 0.0;
 761         const char *color;
 762
 763         total = avg_stats(&runtime_ll_cache_stats[cpu]);
 764
 765         if (total)
 766                 ratio = avg / total * 100.0;
 767
 768         color = get_ratio_color(GRC_CACHE_MISSES, ratio);
 769
 770         fprintf(output, " #  ");
 771         color_fprintf(output, color, "%6.2f%%", ratio);
 772         fprintf(output, " of all LL-cache hits   ");
 773 }
 774
 775 static void abs_printout(int cpu, struct perf_evsel *evsel, double avg)
 776 {
 777         double total, ratio = 0.0;
 778         char cpustr[16] = { '\0', };
 779         const char *fmt;
 780
 781         if (csv_output)
 782                 fmt = "%s%.0f%s%s";
 783         else if (big_num)
 784                 fmt = "%s%'18.0f%s%-25s";
 785         else
 786                 fmt = "%s%18.0f%s%-25s";
 787
 788         if (no_aggr)
 789                 sprintf(cpustr, "CPU%*d%s",
 790                         csv_output ? 0 : -4,
 791                         evsel_list->cpus->map[cpu], csv_sep);
 792         else
 793                 cpu = 0;
 794
 795         fprintf(output, fmt, cpustr, avg, csv_sep, perf_evsel__name(evsel));
 796
 797         if (evsel->cgrp)
 798                 fprintf(output, "%s%s", csv_sep, evsel->cgrp->name);
 799
 800         if (csv_output)
 801                 return;
 802
 803         if (perf_evsel__match(evsel, HARDWARE, HW_INSTRUCTIONS)) {
 804                 total = avg_stats(&runtime_cycles_stats[cpu]);
 805
 806                 if (total)
 807                         ratio = avg / total;
 808
 809                 fprintf(output, " #   %5.2f  insns per cycle        ", ratio);
 810
 811                 total = avg_stats(&runtime_stalled_cycles_front_stats[cpu]);
 812                 total = max(total, avg_stats(&runtime_stalled_cycles_back_stats[cpu]));
 813
 814                 if (total && avg) {
 815                         ratio = total / avg;
 816                         fprintf(output, "\n                                             #   %5.2f  stalled cycles per insn", ratio);
 817                 }
 818
 819         } else if (perf_evsel__match(evsel, HARDWARE, HW_BRANCH_MISSES) &&
 820                         runtime_branches_stats[cpu].n != 0) {
 821                 print_branch_misses(cpu, evsel, avg);
 822         } else if (
 823                 evsel->attr.type == PERF_TYPE_HW_CACHE &&
 824                 evsel->attr.config ==  ( PERF_COUNT_HW_CACHE_L1D |
 825                                         ((PERF_COUNT_HW_CACHE_OP_READ) << 8) |
 826                                         ((PERF_COUNT_HW_CACHE_RESULT_MISS) << 16)) &&
 827                         runtime_l1_dcache_stats[cpu].n != 0) {
 828                 print_l1_dcache_misses(cpu, evsel, avg);
 829         } else if (
 830                 evsel->attr.type == PERF_TYPE_HW_CACHE &&
 831                 evsel->attr.config ==  ( PERF_COUNT_HW_CACHE_L1I |
 832                                         ((PERF_COUNT_HW_CACHE_OP_READ) << 8) |
 833                                         ((PERF_COUNT_HW_CACHE_RESULT_MISS) << 16)) &&
 834                         runtime_l1_icache_stats[cpu].n != 0) {
 835                 print_l1_icache_misses(cpu, evsel, avg);
 836         } else if (
 837                 evsel->attr.type == PERF_TYPE_HW_CACHE &&
 838                 evsel->attr.config ==  ( PERF_COUNT_HW_CACHE_DTLB |
 839                                         ((PERF_COUNT_HW_CACHE_OP_READ) << 8) |
 840                                         ((PERF_COUNT_HW_CACHE_RESULT_MISS) << 16)) &&
 841                         runtime_dtlb_cache_stats[cpu].n != 0) {
 842                 print_dtlb_cache_misses(cpu, evsel, avg);
 843         } else if (
 844                 evsel->attr.type == PERF_TYPE_HW_CACHE &&
 845                 evsel->attr.config ==  ( PERF_COUNT_HW_CACHE_ITLB |
 846                                         ((PERF_COUNT_HW_CACHE_OP_READ) << 8) |
 847                                         ((PERF_COUNT_HW_CACHE_RESULT_MISS) << 16)) &&
 848                         runtime_itlb_cache_stats[cpu].n != 0) {
 849                 print_itlb_cache_misses(cpu, evsel, avg);
 850         } else if (
 851                 evsel->attr.type == PERF_TYPE_HW_CACHE &&
 852                 evsel->attr.config ==  ( PERF_COUNT_HW_CACHE_LL |
 853                                         ((PERF_COUNT_HW_CACHE_OP_READ) << 8) |
 854                                         ((PERF_COUNT_HW_CACHE_RESULT_MISS) << 16)) &&
 855                         runtime_ll_cache_stats[cpu].n != 0) {
 856                 print_ll_cache_misses(cpu, evsel, avg);
 857         } else if (perf_evsel__match(evsel, HARDWARE, HW_CACHE_MISSES) &&
 858                         runtime_cacherefs_stats[cpu].n != 0) {
 859                 total = avg_stats(&runtime_cacherefs_stats[cpu]);
 860
 861                 if (total)
 862                         ratio = avg * 100 / total;
 863
 864                 fprintf(output, " # %8.3f %% of all cache refs    ", ratio);
 865
 866         } else if (perf_evsel__match(evsel, HARDWARE, HW_STALLED_CYCLES_FRONTEND)) {
 867                 print_stalled_cycles_frontend(cpu, evsel, avg);
 868         } else if (perf_evsel__match(evsel, HARDWARE, HW_STALLED_CYCLES_BACKEND)) {
 869                 print_stalled_cycles_backend(cpu, evsel, avg);
 870         } else if (perf_evsel__match(evsel, HARDWARE, HW_CPU_CYCLES)) {
 871                 total = avg_stats(&runtime_nsecs_stats[cpu]);
 872
 873                 if (total)
 874                         ratio = 1.0 * avg / total;
 875
 876                 fprintf(output, " # %8.3f GHz                    ", ratio);
 877         } else if (runtime_nsecs_stats[cpu].n != 0) {
 878                 char unit = 'M';
 879
 880                 total = avg_stats(&runtime_nsecs_stats[cpu]);
 881
 882                 if (total)
 883                         ratio = 1000.0 * avg / total;
 884                 if (ratio < 0.001) {
 885                         ratio *= 1000;
 886                         unit = 'K';
 887                 }
 888
 889                 fprintf(output, " # %8.3f %c/sec                  ", ratio, unit);
 890         } else {
 891                 fprintf(output, "                                   ");
 892         }
 893 }
 894
 895 /*
 896  * Print out the results of a single counter:
 897  * aggregated counts in system-wide mode
 898  */
 899 static void print_counter_aggr(struct perf_evsel *counter)
 900 {
 901         struct perf_stat *ps = counter->priv;
 902         double avg = avg_stats(&ps->res_stats[0]);
 903         int scaled = counter->counts->scaled;
 904
 905         if (scaled == -1) {
 906                 fprintf(output, "%*s%s%*s",
 907                         csv_output ? 0 : 18,
 908                         counter->supported ? CNTR_NOT_COUNTED : CNTR_NOT_SUPPORTED,
 909                         csv_sep,
 910                         csv_output ? 0 : -24,
 911                         perf_evsel__name(counter));
 912
 913                 if (counter->cgrp)
 914                         fprintf(output, "%s%s", csv_sep, counter->cgrp->name);
 915
 916                 fputc('\n', output);
 917                 return;
 918         }
 919
 920         if (nsec_counter(counter))
 921                 nsec_printout(-1, counter, avg);
 922         else
 923                 abs_printout(-1, counter, avg);
 924
 925         print_noise(counter, avg);
 926
 927         if (csv_output) {
 928                 fputc('\n', output);
 929                 return;
 930         }
 931
 932         if (scaled) {
 933                 double avg_enabled, avg_running;
 934
 935                 avg_enabled = avg_stats(&ps->res_stats[1]);
 936                 avg_running = avg_stats(&ps->res_stats[2]);
 937
 938                 fprintf(output, " [%5.2f%%]", 100 * avg_running / avg_enabled);
 939         }
 940         fprintf(output, "\n");
 941 }
 942
 943 /*
 944  * Print out the results of a single counter:
 945  * does not use aggregated count in system-wide
 946  */
 947 static void print_counter(struct perf_evsel *counter)
 948 {
 949         u64 ena, run, val;
 950         int cpu;
 951
 952         for (cpu = 0; cpu < evsel_list->cpus->nr; cpu++) {
 953                 val = counter->counts->cpu[cpu].val;
 954                 ena = counter->counts->cpu[cpu].ena;
 955                 run = counter->counts->cpu[cpu].run;
 956                 if (run == 0 || ena == 0) {
 957                         fprintf(output, "CPU%*d%s%*s%s%*s",
 958                                 csv_output ? 0 : -4,
 959                                 evsel_list->cpus->map[cpu], csv_sep,
 960                                 csv_output ? 0 : 18,
 961                                 counter->supported ? CNTR_NOT_COUNTED : CNTR_NOT_SUPPORTED,
 962                                 csv_sep,
 963                                 csv_output ? 0 : -24,
 964                                 perf_evsel__name(counter));
 965
 966                         if (counter->cgrp)
 967                                 fprintf(output, "%s%s",
 968                                         csv_sep, counter->cgrp->name);
 969
 970                         fputc('\n', output);
 971                         continue;
 972                 }
 973
 974                 if (nsec_counter(counter))
 975                         nsec_printout(cpu, counter, val);
 976                 else
 977                         abs_printout(cpu, counter, val);
 978
 979                 if (!csv_output) {
 980                         print_noise(counter, 1.0);
 981
 982                         if (run != ena)
 983                                 fprintf(output, "  (%.2f%%)",
 984                                         100.0 * run / ena);
 985                 }
 986                 fputc('\n', output);
 987         }
 988 }
 989
 990 static void print_stat(int argc, const char **argv)
 991 {
 992         struct perf_evsel *counter;
 993         int i;
 994
 995         fflush(stdout);
 996
 997         if (!csv_output) {
 998                 fprintf(output, "\n");
 999                 fprintf(output, " Performance counter stats for ");
1000                 if (!perf_target__has_task(&target)) {
1001                         fprintf(output, "\'%s", argv[0]);
1002                         for (i = 1; i < argc; i++)
1003                                 fprintf(output, " %s", argv[i]);
1004                 } else if (target.pid)
1005                         fprintf(output, "process id \'%s", target.pid);
1006                 else
1007                         fprintf(output, "thread id \'%s", target.tid);
1008
1009                 fprintf(output, "\'");
1010                 if (run_count > 1)
1011                         fprintf(output, " (%d runs)", run_count);
1012                 fprintf(output, ":\n\n");
1013         }
1014
1015         if (no_aggr) {
1016                 list_for_each_entry(counter, &evsel_list->entries, node)
1017                         print_counter(counter);
1018         } else {
1019                 list_for_each_entry(counter, &evsel_list->entries, node)
1020                         print_counter_aggr(counter);
1021         }
1022
1023         if (!csv_output) {
1024                 if (!null_run)
1025                         fprintf(output, "\n");
1026                 fprintf(output, " %17.9f seconds time elapsed",
1027                                 avg_stats(&walltime_nsecs_stats)/1e9);
1028                 if (run_count > 1) {
1029                         fprintf(output, "                                        ");
1030                         print_noise_pct(stddev_stats(&walltime_nsecs_stats),
1031                                         avg_stats(&walltime_nsecs_stats));
1032                 }
1033                 fprintf(output, "\n\n");
1034         }
1035 }
1036
1037 static volatile int signr = -1;
1038
1039 static void skip_signal(int signo)
1040 {
1041         if(child_pid == -1)
1042                 done = 1;
1043
1044         signr = signo;
1045 }
1046
1047 static void sig_atexit(void)
1048 {
1049         if (child_pid != -1)
1050                 kill(child_pid, SIGTERM);
1051
1052         if (signr == -1)
1053                 return;
1054
1055         signal(signr, SIG_DFL);
1056         kill(getpid(), signr);
1057 }
1058
1059 static const char * const stat_usage[] = {
1060         "perf stat [<options>] [<command>]",
1061         NULL
1062 };
1063
1064 static int stat__set_big_num(const struct option *opt __used,
1065                              const char *s __used, int unset)
1066 {
1067         big_num_opt = unset ? 0 : 1;
1068         return 0;
1069 }
1070
1071 static bool append_file;
1072
1073 static const struct option options[] = {
1074         OPT_CALLBACK('e', "event", &evsel_list, "event",
1075                      "event selector. use 'perf list' to list available events",
1076                      parse_events_option),
1077         OPT_CALLBACK(0, "filter", &evsel_list, "filter",
1078                      "event filter", parse_filter),
1079         OPT_BOOLEAN('i', "no-inherit", &no_inherit,
1080                     "child tasks do not inherit counters"),
1081         OPT_STRING('p', "pid", &target.pid, "pid",
1082                    "stat events on existing process id"),
1083         OPT_STRING('t', "tid", &target.tid, "tid",
1084                    "stat events on existing thread id"),
1085         OPT_BOOLEAN('a', "all-cpus", &target.system_wide,
1086                     "system-wide collection from all CPUs"),
1087         OPT_BOOLEAN('g', "group", &group,
1088                     "put the counters into a counter group"),
1089         OPT_BOOLEAN('c', "scale", &scale,
1090                     "scale/normalize counters"),
1091         OPT_INCR('v', "verbose", &verbose,
1092                     "be more verbose (show counter open errors, etc)"),
1093         OPT_INTEGER('r', "repeat", &run_count,
1094                     "repeat command and print average + stddev (max: 100)"),
1095         OPT_BOOLEAN('n', "null", &null_run,
1096                     "null run - dont start any counters"),
1097         OPT_INCR('d', "detailed", &detailed_run,
1098                     "detailed run - start a lot of events"),
1099         OPT_BOOLEAN('S', "sync", &sync_run,
1100                     "call sync() before starting a run"),
1101         OPT_CALLBACK_NOOPT('B', "big-num", NULL, NULL,
1102                            "print large numbers with thousands\' separators",
1103                            stat__set_big_num),
1104         OPT_STRING('C', "cpu", &target.cpu_list, "cpu",
1105                     "list of cpus to monitor in system-wide"),
1106         OPT_BOOLEAN('A', "no-aggr", &no_aggr,
1107                     "disable CPU count aggregation"),
1108         OPT_STRING('x', "field-separator", &csv_sep, "separator",
1109                    "print counts with custom separator"),
1110         OPT_CALLBACK('G', "cgroup", &evsel_list, "name",
1111                      "monitor event in cgroup name only",
1112                      parse_cgroups),
1113         OPT_STRING('o', "output", &output_name, "file",
1114                     "output file name"),
1115         OPT_BOOLEAN(0, "append", &append_file, "append to the output file"),
1116         OPT_INTEGER(0, "log-fd", &output_fd,
1117                     "log output to fd, instead of stderr"),
1118         OPT_END()
1119 };
1120
1121 /*
1122  * Add default attributes, if there were no attributes specified or
1123  * if -d/--detailed, -d -d or -d -d -d is used:
1124  */
1125 static int add_default_attributes(void)
1126 {
1127         /* Set attrs if no event is selected and !null_run: */
1128         if (null_run)
1129                 return 0;
1130
1131         if (!evsel_list->nr_entries) {
1132                 if (perf_evlist__add_default_attrs(evsel_list, default_attrs) < 0)
1133                         return -1;
1134         }
1135
1136         /* Detailed events get appended to the event list: */
1137
1138         if (detailed_run <  1)
1139                 return 0;
1140
1141         /* Append detailed run extra attributes: */
1142         if (perf_evlist__add_default_attrs(evsel_list, detailed_attrs) < 0)
1143                 return -1;
1144
1145         if (detailed_run < 2)
1146                 return 0;
1147
1148         /* Append very detailed run extra attributes: */
1149         if (perf_evlist__add_default_attrs(evsel_list, very_detailed_attrs) < 0)
1150                 return -1;
1151
1152         if (detailed_run < 3)
1153                 return 0;
1154
1155         /* Append very, very detailed run extra attributes: */
1156         return perf_evlist__add_default_attrs(evsel_list, very_very_detailed_attrs);
1157 }
1158
1159 int cmd_stat(int argc, const char **argv, const char *prefix __used)
1160 {
1161         struct perf_evsel *pos;
1162         int status = -ENOMEM;
1163         const char *mode;
1164
1165         setlocale(LC_ALL, "");
1166
1167         evsel_list = perf_evlist__new(NULL, NULL);
1168         if (evsel_list == NULL)
1169                 return -ENOMEM;
1170
1171         argc = parse_options(argc, argv, options, stat_usage,
1172                 PARSE_OPT_STOP_AT_NON_OPTION);
1173
1174         output = stderr;
1175         if (output_name && strcmp(output_name, "-"))
1176                 output = NULL;
1177
1178         if (output_name && output_fd) {
1179                 fprintf(stderr, "cannot use both --output and --log-fd\n");
1180                 usage_with_options(stat_usage, options);
1181         }
1182
1183         if (output_fd < 0) {
1184                 fprintf(stderr, "argument to --log-fd must be a > 0\n");
1185                 usage_with_options(stat_usage, options);
1186         }
1187
1188         if (!output) {
1189                 struct timespec tm;
1190                 mode = append_file ? "a" : "w";
1191
1192                 output = fopen(output_name, mode);
1193                 if (!output) {
1194                         perror("failed to create output file");
1195                         exit(-1);
1196                 }
1197                 clock_gettime(CLOCK_REALTIME, &tm);
1198                 fprintf(output, "# started on %s\n", ctime(&tm.tv_sec));
1199         } else if (output_fd > 0) {
1200                 mode = append_file ? "a" : "w";
1201                 output = fdopen(output_fd, mode);
1202                 if (!output) {
1203                         perror("Failed opening logfd");
1204                         return -errno;
1205                 }
1206         }
1207
1208         if (csv_sep) {
1209                 csv_output = true;
1210                 if (!strcmp(csv_sep, "\\t"))
1211                         csv_sep = "\t";
1212         } else
1213                 csv_sep = DEFAULT_SEPARATOR;
1214
1215         /*
1216          * let the spreadsheet do the pretty-printing
1217          */
1218         if (csv_output) {
1219                 /* User explicitly passed -B? */
1220                 if (big_num_opt == 1) {
1221                         fprintf(stderr, "-B option not supported with -x\n");
1222                         usage_with_options(stat_usage, options);
1223                 } else /* Nope, so disable big number formatting */
1224                         big_num = false;
1225         } else if (big_num_opt == 0) /* User passed --no-big-num */
1226                 big_num = false;
1227
1228         if (!argc && !perf_target__has_task(&target))
1229                 usage_with_options(stat_usage, options);
1230         if (run_count <= 0)
1231                 usage_with_options(stat_usage, options);
1232
1233         /* no_aggr, cgroup are for system-wide only */
1234         if ((no_aggr || nr_cgroups) && !perf_target__has_cpu(&target)) {
1235                 fprintf(stderr, "both cgroup and no-aggregation "
1236                         "modes only available in system-wide mode\n");
1237
1238                 usage_with_options(stat_usage, options);
1239         }
1240
1241         if (add_default_attributes())
1242                 goto out;
1243
1244         perf_target__validate(&target);
1245
1246         if (perf_evlist__create_maps(evsel_list, &target) < 0) {
1247                 if (perf_target__has_task(&target))
1248                         pr_err("Problems finding threads of monitor\n");
1249                 if (perf_target__has_cpu(&target))
1250                         perror("failed to parse CPUs map");
1251
1252                 usage_with_options(stat_usage, options);
1253                 return -1;
1254         }
1255
1256         list_for_each_entry(pos, &evsel_list->entries, node) {
1257                 if (perf_evsel__alloc_stat_priv(pos) < 0 ||
1258                     perf_evsel__alloc_counts(pos, evsel_list->cpus->nr) < 0)
1259                         goto out_free_fd;
1260         }
1261
1262         /*
1263          * We dont want to block the signals - that would cause
1264          * child tasks to inherit that and Ctrl-C would not work.
1265          * What we want is for Ctrl-C to work in the exec()-ed
1266          * task, but being ignored by perf stat itself:
1267          */
1268         atexit(sig_atexit);
1269         signal(SIGINT,  skip_signal);
1270         signal(SIGALRM, skip_signal);
1271         signal(SIGABRT, skip_signal);
1272
1273         status = 0;
1274         for (run_idx = 0; run_idx < run_count; run_idx++) {
1275                 if (run_count != 1 && verbose)
1276                         fprintf(output, "[ perf stat: executing run #%d ... ]\n",
1277                                 run_idx + 1);
1278
1279                 if (sync_run)
1280                         sync();
1281
1282                 status = run_perf_stat(argc, argv);
1283         }
1284
1285         if (status != -1)
1286                 print_stat(argc, argv);
1287 out_free_fd:
1288         list_for_each_entry(pos, &evsel_list->entries, node)
1289                 perf_evsel__free_stat_priv(pos);
1290         perf_evlist__delete_maps(evsel_list);
1291 out:
1292         perf_evlist__delete(evsel_list);
1293         return status;
1294 }