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