tools/perf/builtin-stat.c

   1 /*
   2  * builtin-stat.c
   3  *
   4  * Builtin stat command: Give a precise performance counters summary
   5  * overview about any workload, CPU or specific PID.
   6  *
   7  * Sample output:
   8
   9    $ perf stat ./hackbench 10
  10
  11   Time: 0.118
  12
  13   Performance counter stats for './hackbench 10':
  14
  15        1708.761321 task-clock                #   11.037 CPUs utilized
  16             41,190 context-switches          #    0.024 M/sec
  17              6,735 CPU-migrations            #    0.004 M/sec
  18             17,318 page-faults               #    0.010 M/sec
  19      5,205,202,243 cycles                    #    3.046 GHz
  20      3,856,436,920 stalled-cycles-frontend   #   74.09% frontend cycles idle
  21      1,600,790,871 stalled-cycles-backend    #   30.75% backend  cycles idle
  22      2,603,501,247 instructions              #    0.50  insns per cycle
  23                                              #    1.48  stalled cycles per insn
  24        484,357,498 branches                  #  283.455 M/sec
  25          6,388,934 branch-misses             #    1.32% of all branches
  26
  27         0.154822978  seconds time elapsed
  28
  29  *
  30  * Copyright (C) 2008-2011, Red Hat Inc, Ingo Molnar <mingo@redhat.com>
  31  *
  32  * Improvements and fixes by:
  33  *
  34  *   Arjan van de Ven <arjan@linux.intel.com>
  35  *   Yanmin Zhang <yanmin.zhang@intel.com>
  36  *   Wu Fengguang <fengguang.wu@intel.com>
  37  *   Mike Galbraith <efault@gmx.de>
  38  *   Paul Mackerras <paulus@samba.org>
  39  *   Jaswinder Singh Rajput <jaswinder@kernel.org>
  40  *
  41  * Released under the GPL v2. (and only v2, not any later version)
  42  */
  43
  44 #include "perf.h"
  45 #include "builtin.h"
  46 #include "util/util.h"
  47 #include "util/parse-options.h"
  48 #include "util/parse-events.h"
  49 #include "util/event.h"
  50 #include "util/evlist.h"
  51 #include "util/evsel.h"
  52 #include "util/debug.h"
  53 #include "util/color.h"
  54 #include "util/header.h"
  55 #include "util/cpumap.h"
  56 #include "util/thread.h"
  57 #include "util/thread_map.h"
  58
  59 #include <sys/prctl.h>
  60 #include <math.h>
  61 #include <locale.h>
  62
  63 #define DEFAULT_SEPARATOR       " "
  64 #define CNTR_NOT_SUPPORTED      "<not supported>"
  65 #define CNTR_NOT_COUNTED        "<not counted>"
  66
  67 static struct perf_event_attr default_attrs[] = {
  68
  69   { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_TASK_CLOCK              },
  70   { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_CONTEXT_SWITCHES        },
  71   { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_CPU_MIGRATIONS          },
  72   { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_PAGE_FAULTS             },
  73
  74   { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_CPU_CYCLES              },
  75   { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_STALLED_CYCLES_FRONTEND },
  76   { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_STALLED_CYCLES_BACKEND  },
  77   { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_INSTRUCTIONS            },
  78   { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_BRANCH_INSTRUCTIONS     },
  79   { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_BRANCH_MISSES           },
  80
  81 };
  82
  83 /*
  84  * Detailed stats (-d), covering the L1 and last level data caches:
  85  */
  86 static struct perf_event_attr detailed_attrs[] = {
  87
  88   { .type = PERF_TYPE_HW_CACHE,
  89     .config =
  90          PERF_COUNT_HW_CACHE_L1D                <<  0  |
  91         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
  92         (PERF_COUNT_HW_CACHE_RESULT_ACCESS      << 16)                          },
  93
  94   { .type = PERF_TYPE_HW_CACHE,
  95     .config =
  96          PERF_COUNT_HW_CACHE_L1D                <<  0  |
  97         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
  98         (PERF_COUNT_HW_CACHE_RESULT_MISS        << 16)                          },
  99
 100   { .type = PERF_TYPE_HW_CACHE,
 101     .config =
 102          PERF_COUNT_HW_CACHE_LL                 <<  0  |
 103         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
 104         (PERF_COUNT_HW_CACHE_RESULT_ACCESS      << 16)                          },
 105
 106   { .type = PERF_TYPE_HW_CACHE,
 107     .config =
 108          PERF_COUNT_HW_CACHE_LL                 <<  0  |
 109         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
 110         (PERF_COUNT_HW_CACHE_RESULT_MISS        << 16)                          },
 111 };
 112
 113 /*
 114  * Very detailed stats (-d -d), covering the instruction cache and the TLB caches:
 115  */
 116 static struct perf_event_attr very_detailed_attrs[] = {
 117
 118   { .type = PERF_TYPE_HW_CACHE,
 119     .config =
 120          PERF_COUNT_HW_CACHE_L1I                <<  0  |
 121         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
 122         (PERF_COUNT_HW_CACHE_RESULT_ACCESS      << 16)                          },
 123
 124   { .type = PERF_TYPE_HW_CACHE,
 125     .config =
 126          PERF_COUNT_HW_CACHE_L1I                <<  0  |
 127         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
 128         (PERF_COUNT_HW_CACHE_RESULT_MISS        << 16)                          },
 129
 130   { .type = PERF_TYPE_HW_CACHE,
 131     .config =
 132          PERF_COUNT_HW_CACHE_DTLB               <<  0  |
 133         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
 134         (PERF_COUNT_HW_CACHE_RESULT_ACCESS      << 16)                          },
 135
 136   { .type = PERF_TYPE_HW_CACHE,
 137     .config =
 138          PERF_COUNT_HW_CACHE_DTLB               <<  0  |
 139         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
 140         (PERF_COUNT_HW_CACHE_RESULT_MISS        << 16)                          },
 141
 142   { .type = PERF_TYPE_HW_CACHE,
 143     .config =
 144          PERF_COUNT_HW_CACHE_ITLB               <<  0  |
 145         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
 146         (PERF_COUNT_HW_CACHE_RESULT_ACCESS      << 16)                          },
 147
 148   { .type = PERF_TYPE_HW_CACHE,
 149     .config =
 150          PERF_COUNT_HW_CACHE_ITLB               <<  0  |
 151         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
 152         (PERF_COUNT_HW_CACHE_RESULT_MISS        << 16)                          },
 153
 154 };
 155
 156 /*
 157  * Very, very detailed stats (-d -d -d), adding prefetch events:
 158  */
 159 static struct perf_event_attr very_very_detailed_attrs[] = {
 160
 161   { .type = PERF_TYPE_HW_CACHE,
 162     .config =
 163          PERF_COUNT_HW_CACHE_L1D                <<  0  |
 164         (PERF_COUNT_HW_CACHE_OP_PREFETCH        <<  8) |
 165         (PERF_COUNT_HW_CACHE_RESULT_ACCESS      << 16)                          },
 166
 167   { .type = PERF_TYPE_HW_CACHE,
 168     .config =
 169          PERF_COUNT_HW_CACHE_L1D                <<  0  |
 170         (PERF_COUNT_HW_CACHE_OP_PREFETCH        <<  8) |
 171         (PERF_COUNT_HW_CACHE_RESULT_MISS        << 16)                          },
 172 };
 173
 174
 175
 176 struct perf_evlist              *evsel_list;
 177
 178 static bool                     system_wide                     =  false;
 179 static int                      run_idx                         =  0;
 180
 181 static int                      run_count                       =  1;
 182 static bool                     no_inherit                      = false;
 183 static bool                     scale                           =  true;
 184 static bool                     no_aggr                         = false;
 185 static const char               *target_pid;
 186 static const char               *target_tid;
 187 static pid_t                    child_pid                       = -1;
 188 static bool                     null_run                        =  false;
 189 static int                      detailed_run                    =  0;
 190 static bool                     sync_run                        =  false;
 191 static bool                     big_num                         =  true;
 192 static int                      big_num_opt                     =  -1;
 193 static const char               *cpu_list;
 194 static const char               *csv_sep                        = NULL;
 195 static bool                     csv_output                      = false;
 196 static bool                     group                           = false;
 197 static const char               *output_name                    = NULL;
 198 static FILE                     *output                         = NULL;
 199 static int                      output_fd;
 200
 201 static volatile int done = 0;
 202
 203 struct stats
 204 {
 205         double n, mean, M2;
 206 };
 207
 208 struct perf_stat {
 209         struct stats      res_stats[3];
 210 };
 211
 212 static int perf_evsel__alloc_stat_priv(struct perf_evsel *evsel)
 213 {
 214         evsel->priv = zalloc(sizeof(struct perf_stat));
 215         return evsel->priv == NULL ? -ENOMEM : 0;
 216 }
 217
 218 static void perf_evsel__free_stat_priv(struct perf_evsel *evsel)
 219 {
 220         free(evsel->priv);
 221         evsel->priv = NULL;
 222 }
 223
 224 static void update_stats(struct stats *stats, u64 val)
 225 {
 226         double delta;
 227
 228         stats->n++;
 229         delta = val - stats->mean;
 230         stats->mean += delta / stats->n;
 231         stats->M2 += delta*(val - stats->mean);
 232 }
 233
 234 static double avg_stats(struct stats *stats)
 235 {
 236         return stats->mean;
 237 }
 238
 239 /*
 240  * http://en.wikipedia.org/wiki/Algorithms_for_calculating_variance
 241  *
 242  *       (\Sum n_i^2) - ((\Sum n_i)^2)/n
 243  * s^2 = -------------------------------
 244  *                  n - 1
 245  *
 246  * http://en.wikipedia.org/wiki/Stddev
 247  *
 248  * The std dev of the mean is related to the std dev by:
 249  *
 250  *             s
 251  * s_mean = -------
 252  *          sqrt(n)
 253  *
 254  */
 255 static double stddev_stats(struct stats *stats)
 256 {
 257         double variance, variance_mean;
 258
 259         if (!stats->n)
 260                 return 0.0;
 261
 262         variance = stats->M2 / (stats->n - 1);
 263         variance_mean = variance / stats->n;
 264
 265         return sqrt(variance_mean);
 266 }
 267
 268 struct stats                    runtime_nsecs_stats[MAX_NR_CPUS];
 269 struct stats                    runtime_cycles_stats[MAX_NR_CPUS];
 270 struct stats                    runtime_stalled_cycles_front_stats[MAX_NR_CPUS];
 271 struct stats                    runtime_stalled_cycles_back_stats[MAX_NR_CPUS];
 272 struct stats                    runtime_branches_stats[MAX_NR_CPUS];
 273 struct stats                    runtime_cacherefs_stats[MAX_NR_CPUS];
 274 struct stats                    runtime_l1_dcache_stats[MAX_NR_CPUS];
 275 struct stats                    runtime_l1_icache_stats[MAX_NR_CPUS];
 276 struct stats                    runtime_ll_cache_stats[MAX_NR_CPUS];
 277 struct stats                    runtime_itlb_cache_stats[MAX_NR_CPUS];
 278 struct stats                    runtime_dtlb_cache_stats[MAX_NR_CPUS];
 279 struct stats                    walltime_nsecs_stats;
 280
 281 static int create_perf_stat_counter(struct perf_evsel *evsel,
 282                                     struct perf_evsel *first)
 283 {
 284         struct perf_event_attr *attr = &evsel->attr;
 285         struct xyarray *group_fd = NULL;
 286         bool exclude_guest_missing = false;
 287         int ret;
 288
 289         if (group && evsel != first)
 290                 group_fd = first->fd;
 291
 292         if (scale)
 293                 attr->read_format = PERF_FORMAT_TOTAL_TIME_ENABLED |
 294                                     PERF_FORMAT_TOTAL_TIME_RUNNING;
 295
 296         attr->inherit = !no_inherit;
 297
 298 retry:
 299         if (exclude_guest_missing)
 300                 evsel->attr.exclude_guest = evsel->attr.exclude_host = 0;
 301
 302         if (system_wide) {
 303                 ret = perf_evsel__open_per_cpu(evsel, evsel_list->cpus,
 304                                                 group, group_fd);
 305                 if (ret)
 306                         goto check_ret;
 307                 return 0;
 308         }
 309
 310         if (!target_pid && !target_tid && (!group || evsel == first)) {
 311                 attr->disabled = 1;
 312                 attr->enable_on_exec = 1;
 313         }
 314
 315         ret = perf_evsel__open_per_thread(evsel, evsel_list->threads,
 316                                           group, group_fd);
 317         if (!ret)
 318                 return 0;
 319         /* fall through */
 320 check_ret:
 321         if (ret && errno == EINVAL) {
 322                 if (!exclude_guest_missing &&
 323                     (evsel->attr.exclude_guest || evsel->attr.exclude_host)) {
 324                         pr_debug("Old kernel, cannot exclude "
 325                                  "guest or host samples.\n");
 326                         exclude_guest_missing = true;
 327                         goto retry;
 328                 }
 329         }
 330         return ret;
 331 }
 332
 333 /*
 334  * Does the counter have nsecs as a unit?
 335  */
 336 static inline int nsec_counter(struct perf_evsel *evsel)
 337 {
 338         if (perf_evsel__match(evsel, SOFTWARE, SW_CPU_CLOCK) ||
 339             perf_evsel__match(evsel, SOFTWARE, SW_TASK_CLOCK))
 340                 return 1;
 341
 342         return 0;
 343 }
 344
 345 /*
 346  * Update various tracking values we maintain to print
 347  * more semantic information such as miss/hit ratios,
 348  * instruction rates, etc:
 349  */
 350 static void update_shadow_stats(struct perf_evsel *counter, u64 *count)
 351 {
 352         if (perf_evsel__match(counter, SOFTWARE, SW_TASK_CLOCK))
 353                 update_stats(&runtime_nsecs_stats[0], count[0]);
 354         else if (perf_evsel__match(counter, HARDWARE, HW_CPU_CYCLES))
 355                 update_stats(&runtime_cycles_stats[0], count[0]);
 356         else if (perf_evsel__match(counter, HARDWARE, HW_STALLED_CYCLES_FRONTEND))
 357                 update_stats(&runtime_stalled_cycles_front_stats[0], count[0]);
 358         else if (perf_evsel__match(counter, HARDWARE, HW_STALLED_CYCLES_BACKEND))
 359                 update_stats(&runtime_stalled_cycles_back_stats[0], count[0]);
 360         else if (perf_evsel__match(counter, HARDWARE, HW_BRANCH_INSTRUCTIONS))
 361                 update_stats(&runtime_branches_stats[0], count[0]);
 362         else if (perf_evsel__match(counter, HARDWARE, HW_CACHE_REFERENCES))
 363                 update_stats(&runtime_cacherefs_stats[0], count[0]);
 364         else if (perf_evsel__match(counter, HW_CACHE, HW_CACHE_L1D))
 365                 update_stats(&runtime_l1_dcache_stats[0], count[0]);
 366         else if (perf_evsel__match(counter, HW_CACHE, HW_CACHE_L1I))
 367                 update_stats(&runtime_l1_icache_stats[0], count[0]);
 368         else if (perf_evsel__match(counter, HW_CACHE, HW_CACHE_LL))
 369                 update_stats(&runtime_ll_cache_stats[0], count[0]);
 370         else if (perf_evsel__match(counter, HW_CACHE, HW_CACHE_DTLB))
 371                 update_stats(&runtime_dtlb_cache_stats[0], count[0]);
 372         else if (perf_evsel__match(counter, HW_CACHE, HW_CACHE_ITLB))
 373                 update_stats(&runtime_itlb_cache_stats[0], count[0]);
 374 }
 375
 376 /*
 377  * Read out the results of a single counter:
 378  * aggregate counts across CPUs in system-wide mode
 379  */
 380 static int read_counter_aggr(struct perf_evsel *counter)
 381 {
 382         struct perf_stat *ps = counter->priv;
 383         u64 *count = counter->counts->aggr.values;
 384         int i;
 385
 386         if (__perf_evsel__read(counter, evsel_list->cpus->nr,
 387                                evsel_list->threads->nr, scale) < 0)
 388                 return -1;
 389
 390         for (i = 0; i < 3; i++)
 391                 update_stats(&ps->res_stats[i], count[i]);
 392
 393         if (verbose) {
 394                 fprintf(output, "%s: %" PRIu64 " %" PRIu64 " %" PRIu64 "\n",
 395                         event_name(counter), count[0], count[1], count[2]);
 396         }
 397
 398         /*
 399          * Save the full runtime - to allow normalization during printout:
 400          */
 401         update_shadow_stats(counter, count);
 402
 403         return 0;
 404 }
 405
 406 /*
 407  * Read out the results of a single counter:
 408  * do not aggregate counts across CPUs in system-wide mode
 409  */
 410 static int read_counter(struct perf_evsel *counter)
 411 {
 412         u64 *count;
 413         int cpu;
 414
 415         for (cpu = 0; cpu < evsel_list->cpus->nr; cpu++) {
 416                 if (__perf_evsel__read_on_cpu(counter, cpu, 0, scale) < 0)
 417                         return -1;
 418
 419                 count = counter->counts->cpu[cpu].values;
 420
 421                 update_shadow_stats(counter, count);
 422         }
 423
 424         return 0;
 425 }
 426
 427 static int run_perf_stat(int argc __used, const char **argv)
 428 {
 429         unsigned long long t0, t1;
 430         struct perf_evsel *counter, *first;
 431         int status = 0;
 432         int child_ready_pipe[2], go_pipe[2];
 433         const bool forks = (argc > 0);
 434         char buf;
 435
 436         if (forks && (pipe(child_ready_pipe) < 0 || pipe(go_pipe) < 0)) {
 437                 perror("failed to create pipes");
 438                 exit(1);
 439         }
 440
 441         if (forks) {
 442                 if ((child_pid = fork()) < 0)
 443                         perror("failed to fork");
 444
 445                 if (!child_pid) {
 446                         close(child_ready_pipe[0]);
 447                         close(go_pipe[1]);
 448                         fcntl(go_pipe[0], F_SETFD, FD_CLOEXEC);
 449
 450                         /*
 451                          * Do a dummy execvp to get the PLT entry resolved,
 452                          * so we avoid the resolver overhead on the real
 453                          * execvp call.
 454                          */
 455                         execvp("", (char **)argv);
 456
 457                         /*
 458                          * Tell the parent we're ready to go
 459                          */
 460                         close(child_ready_pipe[1]);
 461
 462                         /*
 463                          * Wait until the parent tells us to go.
 464                          */
 465                         if (read(go_pipe[0], &buf, 1) == -1)
 466                                 perror("unable to read pipe");
 467
 468                         execvp(argv[0], (char **)argv);
 469
 470                         perror(argv[0]);
 471                         exit(-1);
 472                 }
 473
 474                 if (!target_tid && !target_pid && !system_wide)
 475                         evsel_list->threads->map[0] = child_pid;
 476
 477                 /*
 478                  * Wait for the child to be ready to exec.
 479                  */
 480                 close(child_ready_pipe[1]);
 481                 close(go_pipe[0]);
 482                 if (read(child_ready_pipe[0], &buf, 1) == -1)
 483                         perror("unable to read pipe");
 484                 close(child_ready_pipe[0]);
 485         }
 486
 487         first = list_entry(evsel_list->entries.next, struct perf_evsel, node);
 488
 489         list_for_each_entry(counter, &evsel_list->entries, node) {
 490                 if (create_perf_stat_counter(counter, first) < 0) {
 491                         if (errno == EINVAL || errno == ENOSYS ||
 492                             errno == ENOENT || errno == EOPNOTSUPP) {
 493                                 if (verbose)
 494                                         ui__warning("%s event is not supported by the kernel.\n",
 495                                                     event_name(counter));
 496                                 counter->supported = false;
 497                                 continue;
 498                         }
 499
 500                         if (errno == EPERM || errno == EACCES) {
 501                                 error("You may not have permission to collect %sstats.\n"
 502                                       "\t Consider tweaking"
 503                                       " /proc/sys/kernel/perf_event_paranoid or running as root.",
 504                                       system_wide ? "system-wide " : "");
 505                         } else {
 506                                 error("open_counter returned with %d (%s). "
 507                                       "/bin/dmesg may provide additional information.\n",
 508                                        errno, strerror(errno));
 509                         }
 510                         if (child_pid != -1)
 511                                 kill(child_pid, SIGTERM);
 512                         die("Not all events could be opened.\n");
 513                         return -1;
 514                 }
 515                 counter->supported = true;
 516         }
 517
 518         if (perf_evlist__set_filters(evsel_list)) {
 519                 error("failed to set filter with %d (%s)\n", errno,
 520                         strerror(errno));
 521                 return -1;
 522         }
 523
 524         /*
 525          * Enable counters and exec the command:
 526          */
 527         t0 = rdclock();
 528
 529         if (forks) {
 530                 close(go_pipe[1]);
 531                 wait(&status);
 532                 if (WIFSIGNALED(status))
 533                         psignal(WTERMSIG(status), argv[0]);
 534         } else {
 535                 while(!done) sleep(1);
 536         }
 537
 538         t1 = rdclock();
 539
 540         update_stats(&walltime_nsecs_stats, t1 - t0);
 541
 542         if (no_aggr) {
 543                 list_for_each_entry(counter, &evsel_list->entries, node) {
 544                         read_counter(counter);
 545                         perf_evsel__close_fd(counter, evsel_list->cpus->nr, 1);
 546                 }
 547         } else {
 548                 list_for_each_entry(counter, &evsel_list->entries, node) {
 549                         read_counter_aggr(counter);
 550                         perf_evsel__close_fd(counter, evsel_list->cpus->nr,
 551                                              evsel_list->threads->nr);
 552                 }
 553         }
 554
 555         return WEXITSTATUS(status);
 556 }
 557
 558 static void print_noise_pct(double total, double avg)
 559 {
 560         double pct = 0.0;
 561
 562         if (avg)
 563                 pct = 100.0*total/avg;
 564
 565         if (csv_output)
 566                 fprintf(output, "%s%.2f%%", csv_sep, pct);
 567         else if (pct)
 568                 fprintf(output, "  ( +-%6.2f%% )", pct);
 569 }
 570
 571 static void print_noise(struct perf_evsel *evsel, double avg)
 572 {
 573         struct perf_stat *ps;
 574
 575         if (run_count == 1)
 576                 return;
 577
 578         ps = evsel->priv;
 579         print_noise_pct(stddev_stats(&ps->res_stats[0]), avg);
 580 }
 581
 582 static void nsec_printout(int cpu, struct perf_evsel *evsel, double avg)
 583 {
 584         double msecs = avg / 1e6;
 585         char cpustr[16] = { '\0', };
 586         const char *fmt = csv_output ? "%s%.6f%s%s" : "%s%18.6f%s%-25s";
 587
 588         if (no_aggr)
 589                 sprintf(cpustr, "CPU%*d%s",
 590                         csv_output ? 0 : -4,
 591                         evsel_list->cpus->map[cpu], csv_sep);
 592
 593         fprintf(output, fmt, cpustr, msecs, csv_sep, event_name(evsel));
 594
 595         if (evsel->cgrp)
 596                 fprintf(output, "%s%s", csv_sep, evsel->cgrp->name);
 597
 598         if (csv_output)
 599                 return;
 600
 601         if (perf_evsel__match(evsel, SOFTWARE, SW_TASK_CLOCK))
 602                 fprintf(output, " # %8.3f CPUs utilized          ",
 603                         avg / avg_stats(&walltime_nsecs_stats));
 604         else
 605                 fprintf(output, "                                   ");
 606 }
 607
 608 /* used for get_ratio_color() */
 609 enum grc_type {
 610         GRC_STALLED_CYCLES_FE,
 611         GRC_STALLED_CYCLES_BE,
 612         GRC_CACHE_MISSES,
 613         GRC_MAX_NR
 614 };
 615
 616 static const char *get_ratio_color(enum grc_type type, double ratio)
 617 {
 618         static const double grc_table[GRC_MAX_NR][3] = {
 619                 [GRC_STALLED_CYCLES_FE] = { 50.0, 30.0, 10.0 },
 620                 [GRC_STALLED_CYCLES_BE] = { 75.0, 50.0, 20.0 },
 621                 [GRC_CACHE_MISSES]      = { 20.0, 10.0, 5.0 },
 622         };
 623         const char *color = PERF_COLOR_NORMAL;
 624
 625         if (ratio > grc_table[type][0])
 626                 color = PERF_COLOR_RED;
 627         else if (ratio > grc_table[type][1])
 628                 color = PERF_COLOR_MAGENTA;
 629         else if (ratio > grc_table[type][2])
 630                 color = PERF_COLOR_YELLOW;
 631
 632         return color;
 633 }
 634
 635 static void print_stalled_cycles_frontend(int cpu, struct perf_evsel *evsel __used, double avg)
 636 {
 637         double total, ratio = 0.0;
 638         const char *color;
 639
 640         total = avg_stats(&runtime_cycles_stats[cpu]);
 641
 642         if (total)
 643                 ratio = avg / total * 100.0;
 644
 645         color = get_ratio_color(GRC_STALLED_CYCLES_FE, ratio);
 646
 647         fprintf(output, " #  ");
 648         color_fprintf(output, color, "%6.2f%%", ratio);
 649         fprintf(output, " frontend cycles idle   ");
 650 }
 651
 652 static void print_stalled_cycles_backend(int cpu, struct perf_evsel *evsel __used, double avg)
 653 {
 654         double total, ratio = 0.0;
 655         const char *color;
 656
 657         total = avg_stats(&runtime_cycles_stats[cpu]);
 658
 659         if (total)
 660                 ratio = avg / total * 100.0;
 661
 662         color = get_ratio_color(GRC_STALLED_CYCLES_BE, ratio);
 663
 664         fprintf(output, " #  ");
 665         color_fprintf(output, color, "%6.2f%%", ratio);
 666         fprintf(output, " backend  cycles idle   ");
 667 }
 668
 669 static void print_branch_misses(int cpu, struct perf_evsel *evsel __used, double avg)
 670 {
 671         double total, ratio = 0.0;
 672         const char *color;
 673
 674         total = avg_stats(&runtime_branches_stats[cpu]);
 675
 676         if (total)
 677                 ratio = avg / total * 100.0;
 678
 679         color = get_ratio_color(GRC_CACHE_MISSES, ratio);
 680
 681         fprintf(output, " #  ");
 682         color_fprintf(output, color, "%6.2f%%", ratio);
 683         fprintf(output, " of all branches        ");
 684 }
 685
 686 static void print_l1_dcache_misses(int cpu, struct perf_evsel *evsel __used, double avg)
 687 {
 688         double total, ratio = 0.0;
 689         const char *color;
 690
 691         total = avg_stats(&runtime_l1_dcache_stats[cpu]);
 692
 693         if (total)
 694                 ratio = avg / total * 100.0;
 695
 696         color = get_ratio_color(GRC_CACHE_MISSES, ratio);
 697
 698         fprintf(output, " #  ");
 699         color_fprintf(output, color, "%6.2f%%", ratio);
 700         fprintf(output, " of all L1-dcache hits  ");
 701 }
 702
 703 static void print_l1_icache_misses(int cpu, struct perf_evsel *evsel __used, double avg)
 704 {
 705         double total, ratio = 0.0;
 706         const char *color;
 707
 708         total = avg_stats(&runtime_l1_icache_stats[cpu]);
 709
 710         if (total)
 711                 ratio = avg / total * 100.0;
 712
 713         color = get_ratio_color(GRC_CACHE_MISSES, ratio);
 714
 715         fprintf(output, " #  ");
 716         color_fprintf(output, color, "%6.2f%%", ratio);
 717         fprintf(output, " of all L1-icache hits  ");
 718 }
 719
 720 static void print_dtlb_cache_misses(int cpu, struct perf_evsel *evsel __used, double avg)
 721 {
 722         double total, ratio = 0.0;
 723         const char *color;
 724
 725         total = avg_stats(&runtime_dtlb_cache_stats[cpu]);
 726
 727         if (total)
 728                 ratio = avg / total * 100.0;
 729
 730         color = get_ratio_color(GRC_CACHE_MISSES, ratio);
 731
 732         fprintf(output, " #  ");
 733         color_fprintf(output, color, "%6.2f%%", ratio);
 734         fprintf(output, " of all dTLB cache hits ");
 735 }
 736
 737 static void print_itlb_cache_misses(int cpu, struct perf_evsel *evsel __used, double avg)
 738 {
 739         double total, ratio = 0.0;
 740         const char *color;
 741
 742         total = avg_stats(&runtime_itlb_cache_stats[cpu]);
 743
 744         if (total)
 745                 ratio = avg / total * 100.0;
 746
 747         color = get_ratio_color(GRC_CACHE_MISSES, ratio);
 748
 749         fprintf(output, " #  ");
 750         color_fprintf(output, color, "%6.2f%%", ratio);
 751         fprintf(output, " of all iTLB cache hits ");
 752 }
 753
 754 static void print_ll_cache_misses(int cpu, struct perf_evsel *evsel __used, double avg)
 755 {
 756         double total, ratio = 0.0;
 757         const char *color;
 758
 759         total = avg_stats(&runtime_ll_cache_stats[cpu]);
 760
 761         if (total)
 762                 ratio = avg / total * 100.0;
 763
 764         color = get_ratio_color(GRC_CACHE_MISSES, ratio);
 765
 766         fprintf(output, " #  ");
 767         color_fprintf(output, color, "%6.2f%%", ratio);
 768         fprintf(output, " of all LL-cache hits   ");
 769 }
 770
 771 static void abs_printout(int cpu, struct perf_evsel *evsel, double avg)
 772 {
 773         double total, ratio = 0.0;
 774         char cpustr[16] = { '\0', };
 775         const char *fmt;
 776
 777         if (csv_output)
 778                 fmt = "%s%.0f%s%s";
 779         else if (big_num)
 780                 fmt = "%s%'18.0f%s%-25s";
 781         else
 782                 fmt = "%s%18.0f%s%-25s";
 783
 784         if (no_aggr)
 785                 sprintf(cpustr, "CPU%*d%s",
 786                         csv_output ? 0 : -4,
 787                         evsel_list->cpus->map[cpu], csv_sep);
 788         else
 789                 cpu = 0;
 790
 791         fprintf(output, fmt, cpustr, avg, csv_sep, event_name(evsel));
 792
 793         if (evsel->cgrp)
 794                 fprintf(output, "%s%s", csv_sep, evsel->cgrp->name);
 795
 796         if (csv_output)
 797                 return;
 798
 799         if (perf_evsel__match(evsel, HARDWARE, HW_INSTRUCTIONS)) {
 800                 total = avg_stats(&runtime_cycles_stats[cpu]);
 801
 802                 if (total)
 803                         ratio = avg / total;
 804
 805                 fprintf(output, " #   %5.2f  insns per cycle        ", ratio);
 806
 807                 total = avg_stats(&runtime_stalled_cycles_front_stats[cpu]);
 808                 total = max(total, avg_stats(&runtime_stalled_cycles_back_stats[cpu]));
 809
 810                 if (total && avg) {
 811                         ratio = total / avg;
 812                         fprintf(output, "\n                                             #   %5.2f  stalled cycles per insn", ratio);
 813                 }
 814
 815         } else if (perf_evsel__match(evsel, HARDWARE, HW_BRANCH_MISSES) &&
 816                         runtime_branches_stats[cpu].n != 0) {
 817                 print_branch_misses(cpu, evsel, avg);
 818         } else if (
 819                 evsel->attr.type == PERF_TYPE_HW_CACHE &&
 820                 evsel->attr.config ==  ( PERF_COUNT_HW_CACHE_L1D |
 821                                         ((PERF_COUNT_HW_CACHE_OP_READ) << 8) |
 822                                         ((PERF_COUNT_HW_CACHE_RESULT_MISS) << 16)) &&
 823                         runtime_l1_dcache_stats[cpu].n != 0) {
 824                 print_l1_dcache_misses(cpu, evsel, avg);
 825         } else if (
 826                 evsel->attr.type == PERF_TYPE_HW_CACHE &&
 827                 evsel->attr.config ==  ( PERF_COUNT_HW_CACHE_L1I |
 828                                         ((PERF_COUNT_HW_CACHE_OP_READ) << 8) |
 829                                         ((PERF_COUNT_HW_CACHE_RESULT_MISS) << 16)) &&
 830                         runtime_l1_icache_stats[cpu].n != 0) {
 831                 print_l1_icache_misses(cpu, evsel, avg);
 832         } else if (
 833                 evsel->attr.type == PERF_TYPE_HW_CACHE &&
 834                 evsel->attr.config ==  ( PERF_COUNT_HW_CACHE_DTLB |
 835                                         ((PERF_COUNT_HW_CACHE_OP_READ) << 8) |
 836                                         ((PERF_COUNT_HW_CACHE_RESULT_MISS) << 16)) &&
 837                         runtime_dtlb_cache_stats[cpu].n != 0) {
 838                 print_dtlb_cache_misses(cpu, evsel, avg);
 839         } else if (
 840                 evsel->attr.type == PERF_TYPE_HW_CACHE &&
 841                 evsel->attr.config ==  ( PERF_COUNT_HW_CACHE_ITLB |
 842                                         ((PERF_COUNT_HW_CACHE_OP_READ) << 8) |
 843                                         ((PERF_COUNT_HW_CACHE_RESULT_MISS) << 16)) &&
 844                         runtime_itlb_cache_stats[cpu].n != 0) {
 845                 print_itlb_cache_misses(cpu, evsel, avg);
 846         } else if (
 847                 evsel->attr.type == PERF_TYPE_HW_CACHE &&
 848                 evsel->attr.config ==  ( PERF_COUNT_HW_CACHE_LL |
 849                                         ((PERF_COUNT_HW_CACHE_OP_READ) << 8) |
 850                                         ((PERF_COUNT_HW_CACHE_RESULT_MISS) << 16)) &&
 851                         runtime_ll_cache_stats[cpu].n != 0) {
 852                 print_ll_cache_misses(cpu, evsel, avg);
 853         } else if (perf_evsel__match(evsel, HARDWARE, HW_CACHE_MISSES) &&
 854                         runtime_cacherefs_stats[cpu].n != 0) {
 855                 total = avg_stats(&runtime_cacherefs_stats[cpu]);
 856
 857                 if (total)
 858                         ratio = avg * 100 / total;
 859
 860                 fprintf(output, " # %8.3f %% of all cache refs    ", ratio);
 861
 862         } else if (perf_evsel__match(evsel, HARDWARE, HW_STALLED_CYCLES_FRONTEND)) {
 863                 print_stalled_cycles_frontend(cpu, evsel, avg);
 864         } else if (perf_evsel__match(evsel, HARDWARE, HW_STALLED_CYCLES_BACKEND)) {
 865                 print_stalled_cycles_backend(cpu, evsel, avg);
 866         } else if (perf_evsel__match(evsel, HARDWARE, HW_CPU_CYCLES)) {
 867                 total = avg_stats(&runtime_nsecs_stats[cpu]);
 868
 869                 if (total)
 870                         ratio = 1.0 * avg / total;
 871
 872                 fprintf(output, " # %8.3f GHz                    ", ratio);
 873         } else if (runtime_nsecs_stats[cpu].n != 0) {
 874                 char unit = 'M';
 875
 876                 total = avg_stats(&runtime_nsecs_stats[cpu]);
 877
 878                 if (total)
 879                         ratio = 1000.0 * avg / total;
 880                 if (ratio < 0.001) {
 881                         ratio *= 1000;
 882                         unit = 'K';
 883                 }
 884
 885                 fprintf(output, " # %8.3f %c/sec                  ", ratio, unit);
 886         } else {
 887                 fprintf(output, "                                   ");
 888         }
 889 }
 890
 891 /*
 892  * Print out the results of a single counter:
 893  * aggregated counts in system-wide mode
 894  */
 895 static void print_counter_aggr(struct perf_evsel *counter)
 896 {
 897         struct perf_stat *ps = counter->priv;
 898         double avg = avg_stats(&ps->res_stats[0]);
 899         int scaled = counter->counts->scaled;
 900
 901         if (scaled == -1) {
 902                 fprintf(output, "%*s%s%*s",
 903                         csv_output ? 0 : 18,
 904                         counter->supported ? CNTR_NOT_COUNTED : CNTR_NOT_SUPPORTED,
 905                         csv_sep,
 906                         csv_output ? 0 : -24,
 907                         event_name(counter));
 908
 909                 if (counter->cgrp)
 910                         fprintf(output, "%s%s", csv_sep, counter->cgrp->name);
 911
 912                 fputc('\n', output);
 913                 return;
 914         }
 915
 916         if (nsec_counter(counter))
 917                 nsec_printout(-1, counter, avg);
 918         else
 919                 abs_printout(-1, counter, avg);
 920
 921         print_noise(counter, avg);
 922
 923         if (csv_output) {
 924                 fputc('\n', output);
 925                 return;
 926         }
 927
 928         if (scaled) {
 929                 double avg_enabled, avg_running;
 930
 931                 avg_enabled = avg_stats(&ps->res_stats[1]);
 932                 avg_running = avg_stats(&ps->res_stats[2]);
 933
 934                 fprintf(output, " [%5.2f%%]", 100 * avg_running / avg_enabled);
 935         }
 936         fprintf(output, "\n");
 937 }
 938
 939 /*
 940  * Print out the results of a single counter:
 941  * does not use aggregated count in system-wide
 942  */
 943 static void print_counter(struct perf_evsel *counter)
 944 {
 945         u64 ena, run, val;
 946         int cpu;
 947
 948         for (cpu = 0; cpu < evsel_list->cpus->nr; cpu++) {
 949                 val = counter->counts->cpu[cpu].val;
 950                 ena = counter->counts->cpu[cpu].ena;
 951                 run = counter->counts->cpu[cpu].run;
 952                 if (run == 0 || ena == 0) {
 953                         fprintf(output, "CPU%*d%s%*s%s%*s",
 954                                 csv_output ? 0 : -4,
 955                                 evsel_list->cpus->map[cpu], csv_sep,
 956                                 csv_output ? 0 : 18,
 957                                 counter->supported ? CNTR_NOT_COUNTED : CNTR_NOT_SUPPORTED,
 958                                 csv_sep,
 959                                 csv_output ? 0 : -24,
 960                                 event_name(counter));
 961
 962                         if (counter->cgrp)
 963                                 fprintf(output, "%s%s",
 964                                         csv_sep, counter->cgrp->name);
 965
 966                         fputc('\n', output);
 967                         continue;
 968                 }
 969
 970                 if (nsec_counter(counter))
 971                         nsec_printout(cpu, counter, val);
 972                 else
 973                         abs_printout(cpu, counter, val);
 974
 975                 if (!csv_output) {
 976                         print_noise(counter, 1.0);
 977
 978                         if (run != ena)
 979                                 fprintf(output, "  (%.2f%%)",
 980                                         100.0 * run / ena);
 981                 }
 982                 fputc('\n', output);
 983         }
 984 }
 985
 986 static void print_stat(int argc, const char **argv)
 987 {
 988         struct perf_evsel *counter;
 989         int i;
 990
 991         fflush(stdout);
 992
 993         if (!csv_output) {
 994                 fprintf(output, "\n");
 995                 fprintf(output, " Performance counter stats for ");
 996                 if (!target_pid && !target_tid) {
 997                         fprintf(output, "\'%s", argv[0]);
 998                         for (i = 1; i < argc; i++)
 999                                 fprintf(output, " %s", argv[i]);
1000                 } else if (target_pid)
1001                         fprintf(output, "process id \'%s", target_pid);
1002                 else
1003                         fprintf(output, "thread id \'%s", target_tid);
1004
1005                 fprintf(output, "\'");
1006                 if (run_count > 1)
1007                         fprintf(output, " (%d runs)", run_count);
1008                 fprintf(output, ":\n\n");
1009         }
1010
1011         if (no_aggr) {
1012                 list_for_each_entry(counter, &evsel_list->entries, node)
1013                         print_counter(counter);
1014         } else {
1015                 list_for_each_entry(counter, &evsel_list->entries, node)
1016                         print_counter_aggr(counter);
1017         }
1018
1019         if (!csv_output) {
1020                 if (!null_run)
1021                         fprintf(output, "\n");
1022                 fprintf(output, " %17.9f seconds time elapsed",
1023                                 avg_stats(&walltime_nsecs_stats)/1e9);
1024                 if (run_count > 1) {
1025                         fprintf(output, "                                        ");
1026                         print_noise_pct(stddev_stats(&walltime_nsecs_stats),
1027                                         avg_stats(&walltime_nsecs_stats));
1028                 }
1029                 fprintf(output, "\n\n");
1030         }
1031 }
1032
1033 static volatile int signr = -1;
1034
1035 static void skip_signal(int signo)
1036 {
1037         if(child_pid == -1)
1038                 done = 1;
1039
1040         signr = signo;
1041 }
1042
1043 static void sig_atexit(void)
1044 {
1045         if (child_pid != -1)
1046                 kill(child_pid, SIGTERM);
1047
1048         if (signr == -1)
1049                 return;
1050
1051         signal(signr, SIG_DFL);
1052         kill(getpid(), signr);
1053 }
1054
1055 static const char * const stat_usage[] = {
1056         "perf stat [<options>] [<command>]",
1057         NULL
1058 };
1059
1060 static int stat__set_big_num(const struct option *opt __used,
1061                              const char *s __used, int unset)
1062 {
1063         big_num_opt = unset ? 0 : 1;
1064         return 0;
1065 }
1066
1067 static bool append_file;
1068
1069 static const struct option options[] = {
1070         OPT_CALLBACK('e', "event", &evsel_list, "event",
1071                      "event selector. use 'perf list' to list available events",
1072                      parse_events_option),
1073         OPT_CALLBACK(0, "filter", &evsel_list, "filter",
1074                      "event filter", parse_filter),
1075         OPT_BOOLEAN('i', "no-inherit", &no_inherit,
1076                     "child tasks do not inherit counters"),
1077         OPT_STRING('p', "pid", &target_pid, "pid",
1078                    "stat events on existing process id"),
1079         OPT_STRING('t', "tid", &target_tid, "tid",
1080                    "stat events on existing thread id"),
1081         OPT_BOOLEAN('a', "all-cpus", &system_wide,
1082                     "system-wide collection from all CPUs"),
1083         OPT_BOOLEAN('g', "group", &group,
1084                     "put the counters into a counter group"),
1085         OPT_BOOLEAN('c', "scale", &scale,
1086                     "scale/normalize counters"),
1087         OPT_INCR('v', "verbose", &verbose,
1088                     "be more verbose (show counter open errors, etc)"),
1089         OPT_INTEGER('r', "repeat", &run_count,
1090                     "repeat command and print average + stddev (max: 100)"),
1091         OPT_BOOLEAN('n', "null", &null_run,
1092                     "null run - dont start any counters"),
1093         OPT_INCR('d', "detailed", &detailed_run,
1094                     "detailed run - start a lot of events"),
1095         OPT_BOOLEAN('S', "sync", &sync_run,
1096                     "call sync() before starting a run"),
1097         OPT_CALLBACK_NOOPT('B', "big-num", NULL, NULL,
1098                            "print large numbers with thousands\' separators",
1099                            stat__set_big_num),
1100         OPT_STRING('C', "cpu", &cpu_list, "cpu",
1101                     "list of cpus to monitor in system-wide"),
1102         OPT_BOOLEAN('A', "no-aggr", &no_aggr,
1103                     "disable CPU count aggregation"),
1104         OPT_STRING('x', "field-separator", &csv_sep, "separator",
1105                    "print counts with custom separator"),
1106         OPT_CALLBACK('G', "cgroup", &evsel_list, "name",
1107                      "monitor event in cgroup name only",
1108                      parse_cgroups),
1109         OPT_STRING('o', "output", &output_name, "file",
1110                     "output file name"),
1111         OPT_BOOLEAN(0, "append", &append_file, "append to the output file"),
1112         OPT_INTEGER(0, "log-fd", &output_fd,
1113                     "log output to fd, instead of stderr"),
1114         OPT_END()
1115 };
1116
1117 /*
1118  * Add default attributes, if there were no attributes specified or
1119  * if -d/--detailed, -d -d or -d -d -d is used:
1120  */
1121 static int add_default_attributes(void)
1122 {
1123         /* Set attrs if no event is selected and !null_run: */
1124         if (null_run)
1125                 return 0;
1126
1127         if (!evsel_list->nr_entries) {
1128                 if (perf_evlist__add_attrs_array(evsel_list, default_attrs) < 0)
1129                         return -1;
1130         }
1131
1132         /* Detailed events get appended to the event list: */
1133
1134         if (detailed_run <  1)
1135                 return 0;
1136
1137         /* Append detailed run extra attributes: */
1138         if (perf_evlist__add_attrs_array(evsel_list, detailed_attrs) < 0)
1139                 return -1;
1140
1141         if (detailed_run < 2)
1142                 return 0;
1143
1144         /* Append very detailed run extra attributes: */
1145         if (perf_evlist__add_attrs_array(evsel_list, very_detailed_attrs) < 0)
1146                 return -1;
1147
1148         if (detailed_run < 3)
1149                 return 0;
1150
1151         /* Append very, very detailed run extra attributes: */
1152         return perf_evlist__add_attrs_array(evsel_list, very_very_detailed_attrs);
1153 }
1154
1155 int cmd_stat(int argc, const char **argv, const char *prefix __used)
1156 {
1157         struct perf_evsel *pos;
1158         int status = -ENOMEM;
1159         const char *mode;
1160
1161         setlocale(LC_ALL, "");
1162
1163         evsel_list = perf_evlist__new(NULL, NULL);
1164         if (evsel_list == NULL)
1165                 return -ENOMEM;
1166
1167         argc = parse_options(argc, argv, options, stat_usage,
1168                 PARSE_OPT_STOP_AT_NON_OPTION);
1169
1170         output = stderr;
1171         if (output_name && strcmp(output_name, "-"))
1172                 output = NULL;
1173
1174         if (output_name && output_fd) {
1175                 fprintf(stderr, "cannot use both --output and --log-fd\n");
1176                 usage_with_options(stat_usage, options);
1177         }
1178         if (!output) {
1179                 struct timespec tm;
1180                 mode = append_file ? "a" : "w";
1181
1182                 output = fopen(output_name, mode);
1183                 if (!output) {
1184                         perror("failed to create output file");
1185                         exit(-1);
1186                 }
1187                 clock_gettime(CLOCK_REALTIME, &tm);
1188                 fprintf(output, "# started on %s\n", ctime(&tm.tv_sec));
1189         } else if (output_fd != 2) {
1190                 mode = append_file ? "a" : "w";
1191                 output = fdopen(output_fd, mode);
1192                 if (!output) {
1193                         perror("Failed opening logfd");
1194                         return -errno;
1195                 }
1196         }
1197
1198         if (csv_sep) {
1199                 csv_output = true;
1200                 if (!strcmp(csv_sep, "\\t"))
1201                         csv_sep = "\t";
1202         } else
1203                 csv_sep = DEFAULT_SEPARATOR;
1204
1205         /*
1206          * let the spreadsheet do the pretty-printing
1207          */
1208         if (csv_output) {
1209                 /* User explicitly passed -B? */
1210                 if (big_num_opt == 1) {
1211                         fprintf(stderr, "-B option not supported with -x\n");
1212                         usage_with_options(stat_usage, options);
1213                 } else /* Nope, so disable big number formatting */
1214                         big_num = false;
1215         } else if (big_num_opt == 0) /* User passed --no-big-num */
1216                 big_num = false;
1217
1218         if (!argc && !target_pid && !target_tid)
1219                 usage_with_options(stat_usage, options);
1220         if (run_count <= 0)
1221                 usage_with_options(stat_usage, options);
1222
1223         /* no_aggr, cgroup are for system-wide only */
1224         if ((no_aggr || nr_cgroups) && !system_wide) {
1225                 fprintf(stderr, "both cgroup and no-aggregation "
1226                         "modes only available in system-wide mode\n");
1227
1228                 usage_with_options(stat_usage, options);
1229         }
1230
1231         if (add_default_attributes())
1232                 goto out;
1233
1234         if (target_pid)
1235                 target_tid = target_pid;
1236
1237         evsel_list->threads = thread_map__new_str(target_pid,
1238                                                   target_tid, UINT_MAX);
1239         if (evsel_list->threads == NULL) {
1240                 pr_err("Problems finding threads of monitor\n");
1241                 usage_with_options(stat_usage, options);
1242         }
1243
1244         if (system_wide)
1245                 evsel_list->cpus = cpu_map__new(cpu_list);
1246         else
1247                 evsel_list->cpus = cpu_map__dummy_new();
1248
1249         if (evsel_list->cpus == NULL) {
1250                 perror("failed to parse CPUs map");
1251                 usage_with_options(stat_usage, options);
1252                 return -1;
1253         }
1254
1255         list_for_each_entry(pos, &evsel_list->entries, node) {
1256                 if (perf_evsel__alloc_stat_priv(pos) < 0 ||
1257                     perf_evsel__alloc_counts(pos, evsel_list->cpus->nr) < 0)
1258                         goto out_free_fd;
1259         }
1260
1261         /*
1262          * We dont want to block the signals - that would cause
1263          * child tasks to inherit that and Ctrl-C would not work.
1264          * What we want is for Ctrl-C to work in the exec()-ed
1265          * task, but being ignored by perf stat itself:
1266          */
1267         atexit(sig_atexit);
1268         signal(SIGINT,  skip_signal);
1269         signal(SIGALRM, skip_signal);
1270         signal(SIGABRT, skip_signal);
1271
1272         status = 0;
1273         for (run_idx = 0; run_idx < run_count; run_idx++) {
1274                 if (run_count != 1 && verbose)
1275                         fprintf(output, "[ perf stat: executing run #%d ... ]\n",
1276                                 run_idx + 1);
1277
1278                 if (sync_run)
1279                         sync();
1280
1281                 status = run_perf_stat(argc, argv);
1282         }
1283
1284         if (status != -1)
1285                 print_stat(argc, argv);
1286 out_free_fd:
1287         list_for_each_entry(pos, &evsel_list->entries, node)
1288                 perf_evsel__free_stat_priv(pos);
1289         perf_evlist__delete_maps(evsel_list);
1290 out:
1291         perf_evlist__delete(evsel_list);
1292         return status;
1293 }