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