Pileus Git - ~andy/linux/blob - tools/perf/builtin-stat.c

   1 /*
   2  * builtin-stat.c
   3  *
   4  * Builtin stat command: Give a precise performance counters summary
   5  * overview about any workload, CPU or specific PID.
   6  *
   7  * Sample output:
   8
   9    $ perf stat ./hackbench 10
  10
  11   Time: 0.118
  12
  13   Performance counter stats for './hackbench 10':
  14
  15        1708.761321 task-clock                #   11.037 CPUs utilized
  16             41,190 context-switches          #    0.024 M/sec
  17              6,735 CPU-migrations            #    0.004 M/sec
  18             17,318 page-faults               #    0.010 M/sec
  19      5,205,202,243 cycles                    #    3.046 GHz
  20      3,856,436,920 stalled-cycles-frontend   #   74.09% frontend cycles idle
  21      1,600,790,871 stalled-cycles-backend    #   30.75% backend  cycles idle
  22      2,603,501,247 instructions              #    0.50  insns per cycle
  23                                              #    1.48  stalled cycles per insn
  24        484,357,498 branches                  #  283.455 M/sec
  25          6,388,934 branch-misses             #    1.32% of all branches
  26
  27         0.154822978  seconds time elapsed
  28
  29  *
  30  * Copyright (C) 2008-2011, Red Hat Inc, Ingo Molnar <mingo@redhat.com>
  31  *
  32  * Improvements and fixes by:
  33  *
  34  *   Arjan van de Ven <arjan@linux.intel.com>
  35  *   Yanmin Zhang <yanmin.zhang@intel.com>
  36  *   Wu Fengguang <fengguang.wu@intel.com>
  37  *   Mike Galbraith <efault@gmx.de>
  38  *   Paul Mackerras <paulus@samba.org>
  39  *   Jaswinder Singh Rajput <jaswinder@kernel.org>
  40  *
  41  * Released under the GPL v2. (and only v2, not any later version)
  42  */
  43
  44 #include "perf.h"
  45 #include "builtin.h"
  46 #include "util/util.h"
  47 #include "util/parse-options.h"
  48 #include "util/parse-events.h"
  49 #include "util/event.h"
  50 #include "util/evlist.h"
  51 #include "util/evsel.h"
  52 #include "util/debug.h"
  53 #include "util/color.h"
  54 #include "util/stat.h"
  55 #include "util/header.h"
  56 #include "util/cpumap.h"
  57 #include "util/thread.h"
  58 #include "util/thread_map.h"
  59
  60 #include <sys/prctl.h>
  61 #include <locale.h>
  62
  63 #define DEFAULT_SEPARATOR       " "
  64 #define CNTR_NOT_SUPPORTED      "<not supported>"
  65 #define CNTR_NOT_COUNTED        "<not counted>"
  66
  67 static struct perf_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 perf_stat {
 203         struct stats      res_stats[3];
 204 };
 205
 206 static int perf_evsel__alloc_stat_priv(struct perf_evsel *evsel)
 207 {
 208         evsel->priv = zalloc(sizeof(struct perf_stat));
 209         return evsel->priv == NULL ? -ENOMEM : 0;
 210 }
 211
 212 static void perf_evsel__free_stat_priv(struct perf_evsel *evsel)
 213 {
 214         free(evsel->priv);
 215         evsel->priv = NULL;
 216 }
 217
 218 static inline struct cpu_map *perf_evsel__cpus(struct perf_evsel *evsel)
 219 {
 220         return (evsel->cpus && !target.cpu_list) ? evsel->cpus : evsel_list->cpus;
 221 }
 222
 223 static inline int perf_evsel__nr_cpus(struct perf_evsel *evsel)
 224 {
 225         return perf_evsel__cpus(evsel)->nr;
 226 }
 227
 228 static struct stats runtime_nsecs_stats[MAX_NR_CPUS];
 229 static struct stats runtime_cycles_stats[MAX_NR_CPUS];
 230 static struct stats runtime_stalled_cycles_front_stats[MAX_NR_CPUS];
 231 static struct stats runtime_stalled_cycles_back_stats[MAX_NR_CPUS];
 232 static struct stats runtime_branches_stats[MAX_NR_CPUS];
 233 static struct stats runtime_cacherefs_stats[MAX_NR_CPUS];
 234 static struct stats runtime_l1_dcache_stats[MAX_NR_CPUS];
 235 static struct stats runtime_l1_icache_stats[MAX_NR_CPUS];
 236 static struct stats runtime_ll_cache_stats[MAX_NR_CPUS];
 237 static struct stats runtime_itlb_cache_stats[MAX_NR_CPUS];
 238 static struct stats runtime_dtlb_cache_stats[MAX_NR_CPUS];
 239 static struct stats walltime_nsecs_stats;
 240
 241 static int create_perf_stat_counter(struct perf_evsel *evsel,
 242                                     struct perf_evsel *first)
 243 {
 244         struct perf_event_attr *attr = &evsel->attr;
 245         bool exclude_guest_missing = false;
 246         int ret;
 247
 248         if (scale)
 249                 attr->read_format = PERF_FORMAT_TOTAL_TIME_ENABLED |
 250                                     PERF_FORMAT_TOTAL_TIME_RUNNING;
 251
 252         attr->inherit = !no_inherit;
 253
 254 retry:
 255         if (exclude_guest_missing)
 256                 evsel->attr.exclude_guest = evsel->attr.exclude_host = 0;
 257
 258         if (perf_target__has_cpu(&target)) {
 259                 ret = perf_evsel__open_per_cpu(evsel, perf_evsel__cpus(evsel));
 260                 if (ret)
 261                         goto check_ret;
 262                 return 0;
 263         }
 264
 265         if (!perf_target__has_task(&target) && (!group || evsel == first)) {
 266                 attr->disabled = 1;
 267                 attr->enable_on_exec = 1;
 268         }
 269
 270         ret = perf_evsel__open_per_thread(evsel, evsel_list->threads);
 271         if (!ret)
 272                 return 0;
 273         /* fall through */
 274 check_ret:
 275         if (ret && errno == EINVAL) {
 276                 if (!exclude_guest_missing &&
 277                     (evsel->attr.exclude_guest || evsel->attr.exclude_host)) {
 278                         pr_debug("Old kernel, cannot exclude "
 279                                  "guest or host samples.\n");
 280                         exclude_guest_missing = true;
 281                         goto retry;
 282                 }
 283         }
 284         return ret;
 285 }
 286
 287 /*
 288  * Does the counter have nsecs as a unit?
 289  */
 290 static inline int nsec_counter(struct perf_evsel *evsel)
 291 {
 292         if (perf_evsel__match(evsel, SOFTWARE, SW_CPU_CLOCK) ||
 293             perf_evsel__match(evsel, SOFTWARE, SW_TASK_CLOCK))
 294                 return 1;
 295
 296         return 0;
 297 }
 298
 299 /*
 300  * Update various tracking values we maintain to print
 301  * more semantic information such as miss/hit ratios,
 302  * instruction rates, etc:
 303  */
 304 static void update_shadow_stats(struct perf_evsel *counter, u64 *count)
 305 {
 306         if (perf_evsel__match(counter, SOFTWARE, SW_TASK_CLOCK))
 307                 update_stats(&runtime_nsecs_stats[0], count[0]);
 308         else if (perf_evsel__match(counter, HARDWARE, HW_CPU_CYCLES))
 309                 update_stats(&runtime_cycles_stats[0], count[0]);
 310         else if (perf_evsel__match(counter, HARDWARE, HW_STALLED_CYCLES_FRONTEND))
 311                 update_stats(&runtime_stalled_cycles_front_stats[0], count[0]);
 312         else if (perf_evsel__match(counter, HARDWARE, HW_STALLED_CYCLES_BACKEND))
 313                 update_stats(&runtime_stalled_cycles_back_stats[0], count[0]);
 314         else if (perf_evsel__match(counter, HARDWARE, HW_BRANCH_INSTRUCTIONS))
 315                 update_stats(&runtime_branches_stats[0], count[0]);
 316         else if (perf_evsel__match(counter, HARDWARE, HW_CACHE_REFERENCES))
 317                 update_stats(&runtime_cacherefs_stats[0], count[0]);
 318         else if (perf_evsel__match(counter, HW_CACHE, HW_CACHE_L1D))
 319                 update_stats(&runtime_l1_dcache_stats[0], count[0]);
 320         else if (perf_evsel__match(counter, HW_CACHE, HW_CACHE_L1I))
 321                 update_stats(&runtime_l1_icache_stats[0], count[0]);
 322         else if (perf_evsel__match(counter, HW_CACHE, HW_CACHE_LL))
 323                 update_stats(&runtime_ll_cache_stats[0], count[0]);
 324         else if (perf_evsel__match(counter, HW_CACHE, HW_CACHE_DTLB))
 325                 update_stats(&runtime_dtlb_cache_stats[0], count[0]);
 326         else if (perf_evsel__match(counter, HW_CACHE, HW_CACHE_ITLB))
 327                 update_stats(&runtime_itlb_cache_stats[0], count[0]);
 328 }
 329
 330 /*
 331  * Read out the results of a single counter:
 332  * aggregate counts across CPUs in system-wide mode
 333  */
 334 static int read_counter_aggr(struct perf_evsel *counter)
 335 {
 336         struct perf_stat *ps = counter->priv;
 337         u64 *count = counter->counts->aggr.values;
 338         int i;
 339
 340         if (__perf_evsel__read(counter, perf_evsel__nr_cpus(counter),
 341                                evsel_list->threads->nr, scale) < 0)
 342                 return -1;
 343
 344         for (i = 0; i < 3; i++)
 345                 update_stats(&ps->res_stats[i], count[i]);
 346
 347         if (verbose) {
 348                 fprintf(output, "%s: %" PRIu64 " %" PRIu64 " %" PRIu64 "\n",
 349                         perf_evsel__name(counter), count[0], count[1], count[2]);
 350         }
 351
 352         /*
 353          * Save the full runtime - to allow normalization during printout:
 354          */
 355         update_shadow_stats(counter, count);
 356
 357         return 0;
 358 }
 359
 360 /*
 361  * Read out the results of a single counter:
 362  * do not aggregate counts across CPUs in system-wide mode
 363  */
 364 static int read_counter(struct perf_evsel *counter)
 365 {
 366         u64 *count;
 367         int cpu;
 368
 369         for (cpu = 0; cpu < perf_evsel__nr_cpus(counter); cpu++) {
 370                 if (__perf_evsel__read_on_cpu(counter, cpu, 0, scale) < 0)
 371                         return -1;
 372
 373                 count = counter->counts->cpu[cpu].values;
 374
 375                 update_shadow_stats(counter, count);
 376         }
 377
 378         return 0;
 379 }
 380
 381 static int run_perf_stat(int argc __maybe_unused, const char **argv)
 382 {
 383         unsigned long long t0, t1;
 384         struct perf_evsel *counter, *first;
 385         int status = 0;
 386         int child_ready_pipe[2], go_pipe[2];
 387         const bool forks = (argc > 0);
 388         char buf;
 389
 390         if (forks && (pipe(child_ready_pipe) < 0 || pipe(go_pipe) < 0)) {
 391                 perror("failed to create pipes");
 392                 return -1;
 393         }
 394
 395         if (forks) {
 396                 if ((child_pid = fork()) < 0)
 397                         perror("failed to fork");
 398
 399                 if (!child_pid) {
 400                         close(child_ready_pipe[0]);
 401                         close(go_pipe[1]);
 402                         fcntl(go_pipe[0], F_SETFD, FD_CLOEXEC);
 403
 404                         /*
 405                          * Do a dummy execvp to get the PLT entry resolved,
 406                          * so we avoid the resolver overhead on the real
 407                          * execvp call.
 408                          */
 409                         execvp("", (char **)argv);
 410
 411                         /*
 412                          * Tell the parent we're ready to go
 413                          */
 414                         close(child_ready_pipe[1]);
 415
 416                         /*
 417                          * Wait until the parent tells us to go.
 418                          */
 419                         if (read(go_pipe[0], &buf, 1) == -1)
 420                                 perror("unable to read pipe");
 421
 422                         execvp(argv[0], (char **)argv);
 423
 424                         perror(argv[0]);
 425                         exit(-1);
 426                 }
 427
 428                 if (perf_target__none(&target))
 429                         evsel_list->threads->map[0] = child_pid;
 430
 431                 /*
 432                  * Wait for the child to be ready to exec.
 433                  */
 434                 close(child_ready_pipe[1]);
 435                 close(go_pipe[0]);
 436                 if (read(child_ready_pipe[0], &buf, 1) == -1)
 437                         perror("unable to read pipe");
 438                 close(child_ready_pipe[0]);
 439         }
 440
 441         if (group)
 442                 perf_evlist__set_leader(evsel_list);
 443
 444         first = perf_evlist__first(evsel_list);
 445
 446         list_for_each_entry(counter, &evsel_list->entries, node) {
 447                 if (create_perf_stat_counter(counter, first) < 0) {
 448                         /*
 449                          * PPC returns ENXIO for HW counters until 2.6.37
 450                          * (behavior changed with commit b0a873e).
 451                          */
 452                         if (errno == EINVAL || errno == ENOSYS ||
 453                             errno == ENOENT || errno == EOPNOTSUPP ||
 454                             errno == ENXIO) {
 455                                 if (verbose)
 456                                         ui__warning("%s event is not supported by the kernel.\n",
 457                                                     perf_evsel__name(counter));
 458                                 counter->supported = false;
 459                                 continue;
 460                         }
 461
 462                         if (errno == EPERM || errno == EACCES) {
 463                                 error("You may not have permission to collect %sstats.\n"
 464                                       "\t Consider tweaking"
 465                                       " /proc/sys/kernel/perf_event_paranoid or running as root.",
 466                                       target.system_wide ? "system-wide " : "");
 467                         } else {
 468                                 error("open_counter returned with %d (%s). "
 469                                       "/bin/dmesg may provide additional information.\n",
 470                                        errno, strerror(errno));
 471                         }
 472                         if (child_pid != -1)
 473                                 kill(child_pid, SIGTERM);
 474
 475                         pr_err("Not all events could be opened.\n");
 476                         return -1;
 477                 }
 478                 counter->supported = true;
 479         }
 480
 481         if (perf_evlist__apply_filters(evsel_list)) {
 482                 error("failed to set filter with %d (%s)\n", errno,
 483                         strerror(errno));
 484                 return -1;
 485         }
 486
 487         /*
 488          * Enable counters and exec the command:
 489          */
 490         t0 = rdclock();
 491
 492         if (forks) {
 493                 close(go_pipe[1]);
 494                 wait(&status);
 495                 if (WIFSIGNALED(status))
 496                         psignal(WTERMSIG(status), argv[0]);
 497         } else {
 498                 while(!done) sleep(1);
 499         }
 500
 501         t1 = rdclock();
 502
 503         update_stats(&walltime_nsecs_stats, t1 - t0);
 504
 505         if (no_aggr) {
 506                 list_for_each_entry(counter, &evsel_list->entries, node) {
 507                         read_counter(counter);
 508                         perf_evsel__close_fd(counter, perf_evsel__nr_cpus(counter), 1);
 509                 }
 510         } else {
 511                 list_for_each_entry(counter, &evsel_list->entries, node) {
 512                         read_counter_aggr(counter);
 513                         perf_evsel__close_fd(counter, perf_evsel__nr_cpus(counter),
 514                                              evsel_list->threads->nr);
 515                 }
 516         }
 517
 518         return WEXITSTATUS(status);
 519 }
 520
 521 static void print_noise_pct(double total, double avg)
 522 {
 523         double pct = rel_stddev_stats(total, avg);
 524
 525         if (csv_output)
 526                 fprintf(output, "%s%.2f%%", csv_sep, pct);
 527         else if (pct)
 528                 fprintf(output, "  ( +-%6.2f%% )", pct);
 529 }
 530
 531 static void print_noise(struct perf_evsel *evsel, double avg)
 532 {
 533         struct perf_stat *ps;
 534
 535         if (run_count == 1)
 536                 return;
 537
 538         ps = evsel->priv;
 539         print_noise_pct(stddev_stats(&ps->res_stats[0]), avg);
 540 }
 541
 542 static void nsec_printout(int cpu, struct perf_evsel *evsel, double avg)
 543 {
 544         double msecs = avg / 1e6;
 545         char cpustr[16] = { '\0', };
 546         const char *fmt = csv_output ? "%s%.6f%s%s" : "%s%18.6f%s%-25s";
 547
 548         if (no_aggr)
 549                 sprintf(cpustr, "CPU%*d%s",
 550                         csv_output ? 0 : -4,
 551                         perf_evsel__cpus(evsel)->map[cpu], csv_sep);
 552
 553         fprintf(output, fmt, cpustr, msecs, csv_sep, perf_evsel__name(evsel));
 554
 555         if (evsel->cgrp)
 556                 fprintf(output, "%s%s", csv_sep, evsel->cgrp->name);
 557
 558         if (csv_output)
 559                 return;
 560
 561         if (perf_evsel__match(evsel, SOFTWARE, SW_TASK_CLOCK))
 562                 fprintf(output, " # %8.3f CPUs utilized          ",
 563                         avg / avg_stats(&walltime_nsecs_stats));
 564         else
 565                 fprintf(output, "                                   ");
 566 }
 567
 568 /* used for get_ratio_color() */
 569 enum grc_type {
 570         GRC_STALLED_CYCLES_FE,
 571         GRC_STALLED_CYCLES_BE,
 572         GRC_CACHE_MISSES,
 573         GRC_MAX_NR
 574 };
 575
 576 static const char *get_ratio_color(enum grc_type type, double ratio)
 577 {
 578         static const double grc_table[GRC_MAX_NR][3] = {
 579                 [GRC_STALLED_CYCLES_FE] = { 50.0, 30.0, 10.0 },
 580                 [GRC_STALLED_CYCLES_BE] = { 75.0, 50.0, 20.0 },
 581                 [GRC_CACHE_MISSES]      = { 20.0, 10.0, 5.0 },
 582         };
 583         const char *color = PERF_COLOR_NORMAL;
 584
 585         if (ratio > grc_table[type][0])
 586                 color = PERF_COLOR_RED;
 587         else if (ratio > grc_table[type][1])
 588                 color = PERF_COLOR_MAGENTA;
 589         else if (ratio > grc_table[type][2])
 590                 color = PERF_COLOR_YELLOW;
 591
 592         return color;
 593 }
 594
 595 static void print_stalled_cycles_frontend(int cpu,
 596                                           struct perf_evsel *evsel
 597                                           __maybe_unused, double avg)
 598 {
 599         double total, ratio = 0.0;
 600         const char *color;
 601
 602         total = avg_stats(&runtime_cycles_stats[cpu]);
 603
 604         if (total)
 605                 ratio = avg / total * 100.0;
 606
 607         color = get_ratio_color(GRC_STALLED_CYCLES_FE, ratio);
 608
 609         fprintf(output, " #  ");
 610         color_fprintf(output, color, "%6.2f%%", ratio);
 611         fprintf(output, " frontend cycles idle   ");
 612 }
 613
 614 static void print_stalled_cycles_backend(int cpu,
 615                                          struct perf_evsel *evsel
 616                                          __maybe_unused, double avg)
 617 {
 618         double total, ratio = 0.0;
 619         const char *color;
 620
 621         total = avg_stats(&runtime_cycles_stats[cpu]);
 622
 623         if (total)
 624                 ratio = avg / total * 100.0;
 625
 626         color = get_ratio_color(GRC_STALLED_CYCLES_BE, ratio);
 627
 628         fprintf(output, " #  ");
 629         color_fprintf(output, color, "%6.2f%%", ratio);
 630         fprintf(output, " backend  cycles idle   ");
 631 }
 632
 633 static void print_branch_misses(int cpu,
 634                                 struct perf_evsel *evsel __maybe_unused,
 635                                 double avg)
 636 {
 637         double total, ratio = 0.0;
 638         const char *color;
 639
 640         total = avg_stats(&runtime_branches_stats[cpu]);
 641
 642         if (total)
 643                 ratio = avg / total * 100.0;
 644
 645         color = get_ratio_color(GRC_CACHE_MISSES, ratio);
 646
 647         fprintf(output, " #  ");
 648         color_fprintf(output, color, "%6.2f%%", ratio);
 649         fprintf(output, " of all branches        ");
 650 }
 651
 652 static void print_l1_dcache_misses(int cpu,
 653                                    struct perf_evsel *evsel __maybe_unused,
 654                                    double avg)
 655 {
 656         double total, ratio = 0.0;
 657         const char *color;
 658
 659         total = avg_stats(&runtime_l1_dcache_stats[cpu]);
 660
 661         if (total)
 662                 ratio = avg / total * 100.0;
 663
 664         color = get_ratio_color(GRC_CACHE_MISSES, ratio);
 665
 666         fprintf(output, " #  ");
 667         color_fprintf(output, color, "%6.2f%%", ratio);
 668         fprintf(output, " of all L1-dcache hits  ");
 669 }
 670
 671 static void print_l1_icache_misses(int cpu,
 672                                    struct perf_evsel *evsel __maybe_unused,
 673                                    double avg)
 674 {
 675         double total, ratio = 0.0;
 676         const char *color;
 677
 678         total = avg_stats(&runtime_l1_icache_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 L1-icache hits  ");
 688 }
 689
 690 static void print_dtlb_cache_misses(int cpu,
 691                                     struct perf_evsel *evsel __maybe_unused,
 692                                     double avg)
 693 {
 694         double total, ratio = 0.0;
 695         const char *color;
 696
 697         total = avg_stats(&runtime_dtlb_cache_stats[cpu]);
 698
 699         if (total)
 700                 ratio = avg / total * 100.0;
 701
 702         color = get_ratio_color(GRC_CACHE_MISSES, ratio);
 703
 704         fprintf(output, " #  ");
 705         color_fprintf(output, color, "%6.2f%%", ratio);
 706         fprintf(output, " of all dTLB cache hits ");
 707 }
 708
 709 static void print_itlb_cache_misses(int cpu,
 710                                     struct perf_evsel *evsel __maybe_unused,
 711                                     double avg)
 712 {
 713         double total, ratio = 0.0;
 714         const char *color;
 715
 716         total = avg_stats(&runtime_itlb_cache_stats[cpu]);
 717
 718         if (total)
 719                 ratio = avg / total * 100.0;
 720
 721         color = get_ratio_color(GRC_CACHE_MISSES, ratio);
 722
 723         fprintf(output, " #  ");
 724         color_fprintf(output, color, "%6.2f%%", ratio);
 725         fprintf(output, " of all iTLB cache hits ");
 726 }
 727
 728 static void print_ll_cache_misses(int cpu,
 729                                   struct perf_evsel *evsel __maybe_unused,
 730                                   double avg)
 731 {
 732         double total, ratio = 0.0;
 733         const char *color;
 734
 735         total = avg_stats(&runtime_ll_cache_stats[cpu]);
 736
 737         if (total)
 738                 ratio = avg / total * 100.0;
 739
 740         color = get_ratio_color(GRC_CACHE_MISSES, ratio);
 741
 742         fprintf(output, " #  ");
 743         color_fprintf(output, color, "%6.2f%%", ratio);
 744         fprintf(output, " of all LL-cache hits   ");
 745 }
 746
 747 static void abs_printout(int cpu, struct perf_evsel *evsel, double avg)
 748 {
 749         double total, ratio = 0.0;
 750         char cpustr[16] = { '\0', };
 751         const char *fmt;
 752
 753         if (csv_output)
 754                 fmt = "%s%.0f%s%s";
 755         else if (big_num)
 756                 fmt = "%s%'18.0f%s%-25s";
 757         else
 758                 fmt = "%s%18.0f%s%-25s";
 759
 760         if (no_aggr)
 761                 sprintf(cpustr, "CPU%*d%s",
 762                         csv_output ? 0 : -4,
 763                         perf_evsel__cpus(evsel)->map[cpu], csv_sep);
 764         else
 765                 cpu = 0;
 766
 767         fprintf(output, fmt, cpustr, avg, csv_sep, perf_evsel__name(evsel));
 768
 769         if (evsel->cgrp)
 770                 fprintf(output, "%s%s", csv_sep, evsel->cgrp->name);
 771
 772         if (csv_output)
 773                 return;
 774
 775         if (perf_evsel__match(evsel, HARDWARE, HW_INSTRUCTIONS)) {
 776                 total = avg_stats(&runtime_cycles_stats[cpu]);
 777
 778                 if (total)
 779                         ratio = avg / total;
 780
 781                 fprintf(output, " #   %5.2f  insns per cycle        ", ratio);
 782
 783                 total = avg_stats(&runtime_stalled_cycles_front_stats[cpu]);
 784                 total = max(total, avg_stats(&runtime_stalled_cycles_back_stats[cpu]));
 785
 786                 if (total && avg) {
 787                         ratio = total / avg;
 788                         fprintf(output, "\n                                             #   %5.2f  stalled cycles per insn", ratio);
 789                 }
 790
 791         } else if (perf_evsel__match(evsel, HARDWARE, HW_BRANCH_MISSES) &&
 792                         runtime_branches_stats[cpu].n != 0) {
 793                 print_branch_misses(cpu, evsel, avg);
 794         } else if (
 795                 evsel->attr.type == PERF_TYPE_HW_CACHE &&
 796                 evsel->attr.config ==  ( PERF_COUNT_HW_CACHE_L1D |
 797                                         ((PERF_COUNT_HW_CACHE_OP_READ) << 8) |
 798                                         ((PERF_COUNT_HW_CACHE_RESULT_MISS) << 16)) &&
 799                         runtime_l1_dcache_stats[cpu].n != 0) {
 800                 print_l1_dcache_misses(cpu, evsel, avg);
 801         } else if (
 802                 evsel->attr.type == PERF_TYPE_HW_CACHE &&
 803                 evsel->attr.config ==  ( PERF_COUNT_HW_CACHE_L1I |
 804                                         ((PERF_COUNT_HW_CACHE_OP_READ) << 8) |
 805                                         ((PERF_COUNT_HW_CACHE_RESULT_MISS) << 16)) &&
 806                         runtime_l1_icache_stats[cpu].n != 0) {
 807                 print_l1_icache_misses(cpu, evsel, avg);
 808         } else if (
 809                 evsel->attr.type == PERF_TYPE_HW_CACHE &&
 810                 evsel->attr.config ==  ( PERF_COUNT_HW_CACHE_DTLB |
 811                                         ((PERF_COUNT_HW_CACHE_OP_READ) << 8) |
 812                                         ((PERF_COUNT_HW_CACHE_RESULT_MISS) << 16)) &&
 813                         runtime_dtlb_cache_stats[cpu].n != 0) {
 814                 print_dtlb_cache_misses(cpu, evsel, avg);
 815         } else if (
 816                 evsel->attr.type == PERF_TYPE_HW_CACHE &&
 817                 evsel->attr.config ==  ( PERF_COUNT_HW_CACHE_ITLB |
 818                                         ((PERF_COUNT_HW_CACHE_OP_READ) << 8) |
 819                                         ((PERF_COUNT_HW_CACHE_RESULT_MISS) << 16)) &&
 820                         runtime_itlb_cache_stats[cpu].n != 0) {
 821                 print_itlb_cache_misses(cpu, evsel, avg);
 822         } else if (
 823                 evsel->attr.type == PERF_TYPE_HW_CACHE &&
 824                 evsel->attr.config ==  ( PERF_COUNT_HW_CACHE_LL |
 825                                         ((PERF_COUNT_HW_CACHE_OP_READ) << 8) |
 826                                         ((PERF_COUNT_HW_CACHE_RESULT_MISS) << 16)) &&
 827                         runtime_ll_cache_stats[cpu].n != 0) {
 828                 print_ll_cache_misses(cpu, evsel, avg);
 829         } else if (perf_evsel__match(evsel, HARDWARE, HW_CACHE_MISSES) &&
 830                         runtime_cacherefs_stats[cpu].n != 0) {
 831                 total = avg_stats(&runtime_cacherefs_stats[cpu]);
 832
 833                 if (total)
 834                         ratio = avg * 100 / total;
 835
 836                 fprintf(output, " # %8.3f %% of all cache refs    ", ratio);
 837
 838         } else if (perf_evsel__match(evsel, HARDWARE, HW_STALLED_CYCLES_FRONTEND)) {
 839                 print_stalled_cycles_frontend(cpu, evsel, avg);
 840         } else if (perf_evsel__match(evsel, HARDWARE, HW_STALLED_CYCLES_BACKEND)) {
 841                 print_stalled_cycles_backend(cpu, evsel, avg);
 842         } else if (perf_evsel__match(evsel, HARDWARE, HW_CPU_CYCLES)) {
 843                 total = avg_stats(&runtime_nsecs_stats[cpu]);
 844
 845                 if (total)
 846                         ratio = 1.0 * avg / total;
 847
 848                 fprintf(output, " # %8.3f GHz                    ", ratio);
 849         } else if (runtime_nsecs_stats[cpu].n != 0) {
 850                 char unit = 'M';
 851
 852                 total = avg_stats(&runtime_nsecs_stats[cpu]);
 853
 854                 if (total)
 855                         ratio = 1000.0 * avg / total;
 856                 if (ratio < 0.001) {
 857                         ratio *= 1000;
 858                         unit = 'K';
 859                 }
 860
 861                 fprintf(output, " # %8.3f %c/sec                  ", ratio, unit);
 862         } else {
 863                 fprintf(output, "                                   ");
 864         }
 865 }
 866
 867 /*
 868  * Print out the results of a single counter:
 869  * aggregated counts in system-wide mode
 870  */
 871 static void print_counter_aggr(struct perf_evsel *counter)
 872 {
 873         struct perf_stat *ps = counter->priv;
 874         double avg = avg_stats(&ps->res_stats[0]);
 875         int scaled = counter->counts->scaled;
 876
 877         if (scaled == -1) {
 878                 fprintf(output, "%*s%s%*s",
 879                         csv_output ? 0 : 18,
 880                         counter->supported ? CNTR_NOT_COUNTED : CNTR_NOT_SUPPORTED,
 881                         csv_sep,
 882                         csv_output ? 0 : -24,
 883                         perf_evsel__name(counter));
 884
 885                 if (counter->cgrp)
 886                         fprintf(output, "%s%s", csv_sep, counter->cgrp->name);
 887
 888                 fputc('\n', output);
 889                 return;
 890         }
 891
 892         if (nsec_counter(counter))
 893                 nsec_printout(-1, counter, avg);
 894         else
 895                 abs_printout(-1, counter, avg);
 896
 897         print_noise(counter, avg);
 898
 899         if (csv_output) {
 900                 fputc('\n', output);
 901                 return;
 902         }
 903
 904         if (scaled) {
 905                 double avg_enabled, avg_running;
 906
 907                 avg_enabled = avg_stats(&ps->res_stats[1]);
 908                 avg_running = avg_stats(&ps->res_stats[2]);
 909
 910                 fprintf(output, " [%5.2f%%]", 100 * avg_running / avg_enabled);
 911         }
 912         fprintf(output, "\n");
 913 }
 914
 915 /*
 916  * Print out the results of a single counter:
 917  * does not use aggregated count in system-wide
 918  */
 919 static void print_counter(struct perf_evsel *counter)
 920 {
 921         u64 ena, run, val;
 922         int cpu;
 923
 924         for (cpu = 0; cpu < perf_evsel__nr_cpus(counter); cpu++) {
 925                 val = counter->counts->cpu[cpu].val;
 926                 ena = counter->counts->cpu[cpu].ena;
 927                 run = counter->counts->cpu[cpu].run;
 928                 if (run == 0 || ena == 0) {
 929                         fprintf(output, "CPU%*d%s%*s%s%*s",
 930                                 csv_output ? 0 : -4,
 931                                 perf_evsel__cpus(counter)->map[cpu], csv_sep,
 932                                 csv_output ? 0 : 18,
 933                                 counter->supported ? CNTR_NOT_COUNTED : CNTR_NOT_SUPPORTED,
 934                                 csv_sep,
 935                                 csv_output ? 0 : -24,
 936                                 perf_evsel__name(counter));
 937
 938                         if (counter->cgrp)
 939                                 fprintf(output, "%s%s",
 940                                         csv_sep, counter->cgrp->name);
 941
 942                         fputc('\n', output);
 943                         continue;
 944                 }
 945
 946                 if (nsec_counter(counter))
 947                         nsec_printout(cpu, counter, val);
 948                 else
 949                         abs_printout(cpu, counter, val);
 950
 951                 if (!csv_output) {
 952                         print_noise(counter, 1.0);
 953
 954                         if (run != ena)
 955                                 fprintf(output, "  (%.2f%%)",
 956                                         100.0 * run / ena);
 957                 }
 958                 fputc('\n', output);
 959         }
 960 }
 961
 962 static void print_stat(int argc, const char **argv)
 963 {
 964         struct perf_evsel *counter;
 965         int i;
 966
 967         fflush(stdout);
 968
 969         if (!csv_output) {
 970                 fprintf(output, "\n");
 971                 fprintf(output, " Performance counter stats for ");
 972                 if (!perf_target__has_task(&target)) {
 973                         fprintf(output, "\'%s", argv[0]);
 974                         for (i = 1; i < argc; i++)
 975                                 fprintf(output, " %s", argv[i]);
 976                 } else if (target.pid)
 977                         fprintf(output, "process id \'%s", target.pid);
 978                 else
 979                         fprintf(output, "thread id \'%s", target.tid);
 980
 981                 fprintf(output, "\'");
 982                 if (run_count > 1)
 983                         fprintf(output, " (%d runs)", run_count);
 984                 fprintf(output, ":\n\n");
 985         }
 986
 987         if (no_aggr) {
 988                 list_for_each_entry(counter, &evsel_list->entries, node)
 989                         print_counter(counter);
 990         } else {
 991                 list_for_each_entry(counter, &evsel_list->entries, node)
 992                         print_counter_aggr(counter);
 993         }
 994
 995         if (!csv_output) {
 996                 if (!null_run)
 997                         fprintf(output, "\n");
 998                 fprintf(output, " %17.9f seconds time elapsed",
 999                                 avg_stats(&walltime_nsecs_stats)/1e9);
1000                 if (run_count > 1) {
1001                         fprintf(output, "                                        ");
1002                         print_noise_pct(stddev_stats(&walltime_nsecs_stats),
1003                                         avg_stats(&walltime_nsecs_stats));
1004                 }
1005                 fprintf(output, "\n\n");
1006         }
1007 }
1008
1009 static volatile int signr = -1;
1010
1011 static void skip_signal(int signo)
1012 {
1013         if(child_pid == -1)
1014                 done = 1;
1015
1016         signr = signo;
1017 }
1018
1019 static void sig_atexit(void)
1020 {
1021         if (child_pid != -1)
1022                 kill(child_pid, SIGTERM);
1023
1024         if (signr == -1)
1025                 return;
1026
1027         signal(signr, SIG_DFL);
1028         kill(getpid(), signr);
1029 }
1030
1031 static const char * const stat_usage[] = {
1032         "perf stat [<options>] [<command>]",
1033         NULL
1034 };
1035
1036 static int stat__set_big_num(const struct option *opt __maybe_unused,
1037                              const char *s __maybe_unused, int unset)
1038 {
1039         big_num_opt = unset ? 0 : 1;
1040         return 0;
1041 }
1042
1043 static bool append_file;
1044
1045 static const struct option options[] = {
1046         OPT_CALLBACK('e', "event", &evsel_list, "event",
1047                      "event selector. use 'perf list' to list available events",
1048                      parse_events_option),
1049         OPT_CALLBACK(0, "filter", &evsel_list, "filter",
1050                      "event filter", parse_filter),
1051         OPT_BOOLEAN('i', "no-inherit", &no_inherit,
1052                     "child tasks do not inherit counters"),
1053         OPT_STRING('p', "pid", &target.pid, "pid",
1054                    "stat events on existing process id"),
1055         OPT_STRING('t', "tid", &target.tid, "tid",
1056                    "stat events on existing thread id"),
1057         OPT_BOOLEAN('a', "all-cpus", &target.system_wide,
1058                     "system-wide collection from all CPUs"),
1059         OPT_BOOLEAN('g', "group", &group,
1060                     "put the counters into a counter group"),
1061         OPT_BOOLEAN('c', "scale", &scale,
1062                     "scale/normalize counters"),
1063         OPT_INCR('v', "verbose", &verbose,
1064                     "be more verbose (show counter open errors, etc)"),
1065         OPT_INTEGER('r', "repeat", &run_count,
1066                     "repeat command and print average + stddev (max: 100)"),
1067         OPT_BOOLEAN('n', "null", &null_run,
1068                     "null run - dont start any counters"),
1069         OPT_INCR('d', "detailed", &detailed_run,
1070                     "detailed run - start a lot of events"),
1071         OPT_BOOLEAN('S', "sync", &sync_run,
1072                     "call sync() before starting a run"),
1073         OPT_CALLBACK_NOOPT('B', "big-num", NULL, NULL,
1074                            "print large numbers with thousands\' separators",
1075                            stat__set_big_num),
1076         OPT_STRING('C', "cpu", &target.cpu_list, "cpu",
1077                     "list of cpus to monitor in system-wide"),
1078         OPT_BOOLEAN('A', "no-aggr", &no_aggr,
1079                     "disable CPU count aggregation"),
1080         OPT_STRING('x', "field-separator", &csv_sep, "separator",
1081                    "print counts with custom separator"),
1082         OPT_CALLBACK('G', "cgroup", &evsel_list, "name",
1083                      "monitor event in cgroup name only",
1084                      parse_cgroups),
1085         OPT_STRING('o', "output", &output_name, "file",
1086                     "output file name"),
1087         OPT_BOOLEAN(0, "append", &append_file, "append to the output file"),
1088         OPT_INTEGER(0, "log-fd", &output_fd,
1089                     "log output to fd, instead of stderr"),
1090         OPT_END()
1091 };
1092
1093 /*
1094  * Add default attributes, if there were no attributes specified or
1095  * if -d/--detailed, -d -d or -d -d -d is used:
1096  */
1097 static int add_default_attributes(void)
1098 {
1099         /* Set attrs if no event is selected and !null_run: */
1100         if (null_run)
1101                 return 0;
1102
1103         if (!evsel_list->nr_entries) {
1104                 if (perf_evlist__add_default_attrs(evsel_list, default_attrs) < 0)
1105                         return -1;
1106         }
1107
1108         /* Detailed events get appended to the event list: */
1109
1110         if (detailed_run <  1)
1111                 return 0;
1112
1113         /* Append detailed run extra attributes: */
1114         if (perf_evlist__add_default_attrs(evsel_list, detailed_attrs) < 0)
1115                 return -1;
1116
1117         if (detailed_run < 2)
1118                 return 0;
1119
1120         /* Append very detailed run extra attributes: */
1121         if (perf_evlist__add_default_attrs(evsel_list, very_detailed_attrs) < 0)
1122                 return -1;
1123
1124         if (detailed_run < 3)
1125                 return 0;
1126
1127         /* Append very, very detailed run extra attributes: */
1128         return perf_evlist__add_default_attrs(evsel_list, very_very_detailed_attrs);
1129 }
1130
1131 int cmd_stat(int argc, const char **argv, const char *prefix __maybe_unused)
1132 {
1133         struct perf_evsel *pos;
1134         int status = -ENOMEM;
1135         const char *mode;
1136
1137         setlocale(LC_ALL, "");
1138
1139         evsel_list = perf_evlist__new(NULL, NULL);
1140         if (evsel_list == NULL)
1141                 return -ENOMEM;
1142
1143         argc = parse_options(argc, argv, options, stat_usage,
1144                 PARSE_OPT_STOP_AT_NON_OPTION);
1145
1146         output = stderr;
1147         if (output_name && strcmp(output_name, "-"))
1148                 output = NULL;
1149
1150         if (output_name && output_fd) {
1151                 fprintf(stderr, "cannot use both --output and --log-fd\n");
1152                 usage_with_options(stat_usage, options);
1153         }
1154
1155         if (output_fd < 0) {
1156                 fprintf(stderr, "argument to --log-fd must be a > 0\n");
1157                 usage_with_options(stat_usage, options);
1158         }
1159
1160         if (!output) {
1161                 struct timespec tm;
1162                 mode = append_file ? "a" : "w";
1163
1164                 output = fopen(output_name, mode);
1165                 if (!output) {
1166                         perror("failed to create output file");
1167                         return -1;
1168                 }
1169                 clock_gettime(CLOCK_REALTIME, &tm);
1170                 fprintf(output, "# started on %s\n", ctime(&tm.tv_sec));
1171         } else if (output_fd > 0) {
1172                 mode = append_file ? "a" : "w";
1173                 output = fdopen(output_fd, mode);
1174                 if (!output) {
1175                         perror("Failed opening logfd");
1176                         return -errno;
1177                 }
1178         }
1179
1180         if (csv_sep) {
1181                 csv_output = true;
1182                 if (!strcmp(csv_sep, "\\t"))
1183                         csv_sep = "\t";
1184         } else
1185                 csv_sep = DEFAULT_SEPARATOR;
1186
1187         /*
1188          * let the spreadsheet do the pretty-printing
1189          */
1190         if (csv_output) {
1191                 /* User explicitly passed -B? */
1192                 if (big_num_opt == 1) {
1193                         fprintf(stderr, "-B option not supported with -x\n");
1194                         usage_with_options(stat_usage, options);
1195                 } else /* Nope, so disable big number formatting */
1196                         big_num = false;
1197         } else if (big_num_opt == 0) /* User passed --no-big-num */
1198                 big_num = false;
1199
1200         if (!argc && !perf_target__has_task(&target))
1201                 usage_with_options(stat_usage, options);
1202         if (run_count <= 0)
1203                 usage_with_options(stat_usage, options);
1204
1205         /* no_aggr, cgroup are for system-wide only */
1206         if ((no_aggr || nr_cgroups) && !perf_target__has_cpu(&target)) {
1207                 fprintf(stderr, "both cgroup and no-aggregation "
1208                         "modes only available in system-wide mode\n");
1209
1210                 usage_with_options(stat_usage, options);
1211         }
1212
1213         if (add_default_attributes())
1214                 goto out;
1215
1216         perf_target__validate(&target);
1217
1218         if (perf_evlist__create_maps(evsel_list, &target) < 0) {
1219                 if (perf_target__has_task(&target))
1220                         pr_err("Problems finding threads of monitor\n");
1221                 if (perf_target__has_cpu(&target))
1222                         perror("failed to parse CPUs map");
1223
1224                 usage_with_options(stat_usage, options);
1225                 return -1;
1226         }
1227
1228         list_for_each_entry(pos, &evsel_list->entries, node) {
1229                 if (perf_evsel__alloc_stat_priv(pos) < 0 ||
1230                     perf_evsel__alloc_counts(pos, perf_evsel__nr_cpus(pos)) < 0)
1231                         goto out_free_fd;
1232         }
1233
1234         /*
1235          * We dont want to block the signals - that would cause
1236          * child tasks to inherit that and Ctrl-C would not work.
1237          * What we want is for Ctrl-C to work in the exec()-ed
1238          * task, but being ignored by perf stat itself:
1239          */
1240         atexit(sig_atexit);
1241         signal(SIGINT,  skip_signal);
1242         signal(SIGALRM, skip_signal);
1243         signal(SIGABRT, skip_signal);
1244
1245         status = 0;
1246         for (run_idx = 0; run_idx < run_count; run_idx++) {
1247                 if (run_count != 1 && verbose)
1248                         fprintf(output, "[ perf stat: executing run #%d ... ]\n",
1249                                 run_idx + 1);
1250
1251                 if (sync_run)
1252                         sync();
1253
1254                 status = run_perf_stat(argc, argv);
1255         }
1256
1257         if (status != -1)
1258                 print_stat(argc, argv);
1259 out_free_fd:
1260         list_for_each_entry(pos, &evsel_list->entries, node)
1261                 perf_evsel__free_stat_priv(pos);
1262         perf_evlist__delete_maps(evsel_list);
1263 out:
1264         perf_evlist__delete(evsel_list);
1265         return status;
1266 }