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/cgroup.h"
  47 #include "util/util.h"
  48 #include "util/parse-options.h"
  49 #include "util/parse-events.h"
  50 #include "util/pmu.h"
  51 #include "util/event.h"
  52 #include "util/evlist.h"
  53 #include "util/evsel.h"
  54 #include "util/debug.h"
  55 #include "util/color.h"
  56 #include "util/stat.h"
  57 #include "util/header.h"
  58 #include "util/cpumap.h"
  59 #include "util/thread.h"
  60 #include "util/thread_map.h"
  61
  62 #include <stdlib.h>
  63 #include <sys/prctl.h>
  64 #include <locale.h>
  65
  66 #define DEFAULT_SEPARATOR       " "
  67 #define CNTR_NOT_SUPPORTED      "<not supported>"
  68 #define CNTR_NOT_COUNTED        "<not counted>"
  69
  70 static void print_stat(int argc, const char **argv);
  71 static void print_counter_aggr(struct perf_evsel *counter, char *prefix);
  72 static void print_counter(struct perf_evsel *counter, char *prefix);
  73 static void print_aggr(char *prefix);
  74
  75 /* Default events used for perf stat -T */
  76 static const char * const transaction_attrs[] = {
  77         "task-clock",
  78         "{"
  79         "instructions,"
  80         "cycles,"
  81         "cpu/cycles-t/,"
  82         "cpu/tx-start/,"
  83         "cpu/el-start/,"
  84         "cpu/cycles-ct/"
  85         "}"
  86 };
  87
  88 /* More limited version when the CPU does not have all events. */
  89 static const char * const transaction_limited_attrs[] = {
  90         "task-clock",
  91         "{"
  92         "instructions,"
  93         "cycles,"
  94         "cpu/cycles-t/,"
  95         "cpu/tx-start/"
  96         "}"
  97 };
  98
  99 /* must match transaction_attrs and the beginning limited_attrs */
 100 enum {
 101         T_TASK_CLOCK,
 102         T_INSTRUCTIONS,
 103         T_CYCLES,
 104         T_CYCLES_IN_TX,
 105         T_TRANSACTION_START,
 106         T_ELISION_START,
 107         T_CYCLES_IN_TX_CP,
 108 };
 109
 110 static struct perf_evlist       *evsel_list;
 111
 112 static struct target target = {
 113         .uid    = UINT_MAX,
 114 };
 115
 116 enum aggr_mode {
 117         AGGR_NONE,
 118         AGGR_GLOBAL,
 119         AGGR_SOCKET,
 120         AGGR_CORE,
 121 };
 122
 123 static int                      run_count                       =  1;
 124 static bool                     no_inherit                      = false;
 125 static bool                     scale                           =  true;
 126 static enum aggr_mode           aggr_mode                       = AGGR_GLOBAL;
 127 static volatile pid_t           child_pid                       = -1;
 128 static bool                     null_run                        =  false;
 129 static int                      detailed_run                    =  0;
 130 static bool                     transaction_run;
 131 static bool                     big_num                         =  true;
 132 static int                      big_num_opt                     =  -1;
 133 static const char               *csv_sep                        = NULL;
 134 static bool                     csv_output                      = false;
 135 static bool                     group                           = false;
 136 static FILE                     *output                         = NULL;
 137 static const char               *pre_cmd                        = NULL;
 138 static const char               *post_cmd                       = NULL;
 139 static bool                     sync_run                        = false;
 140 static unsigned int             interval                        = 0;
 141 static unsigned int             initial_delay                   = 0;
 142 static unsigned int             unit_width                      = 4; /* strlen("unit") */
 143 static bool                     forever                         = false;
 144 static struct timespec          ref_time;
 145 static struct cpu_map           *aggr_map;
 146 static int                      (*aggr_get_id)(struct cpu_map *m, int cpu);
 147
 148 static volatile int done = 0;
 149
 150 struct perf_stat {
 151         struct stats      res_stats[3];
 152 };
 153
 154 static inline void diff_timespec(struct timespec *r, struct timespec *a,
 155                                  struct timespec *b)
 156 {
 157         r->tv_sec = a->tv_sec - b->tv_sec;
 158         if (a->tv_nsec < b->tv_nsec) {
 159                 r->tv_nsec = a->tv_nsec + 1000000000L - b->tv_nsec;
 160                 r->tv_sec--;
 161         } else {
 162                 r->tv_nsec = a->tv_nsec - b->tv_nsec ;
 163         }
 164 }
 165
 166 static inline struct cpu_map *perf_evsel__cpus(struct perf_evsel *evsel)
 167 {
 168         return (evsel->cpus && !target.cpu_list) ? evsel->cpus : evsel_list->cpus;
 169 }
 170
 171 static inline int perf_evsel__nr_cpus(struct perf_evsel *evsel)
 172 {
 173         return perf_evsel__cpus(evsel)->nr;
 174 }
 175
 176 static void perf_evsel__reset_stat_priv(struct perf_evsel *evsel)
 177 {
 178         int i;
 179         struct perf_stat *ps = evsel->priv;
 180
 181         for (i = 0; i < 3; i++)
 182                 init_stats(&ps->res_stats[i]);
 183 }
 184
 185 static int perf_evsel__alloc_stat_priv(struct perf_evsel *evsel)
 186 {
 187         evsel->priv = zalloc(sizeof(struct perf_stat));
 188         if (evsel->priv == NULL)
 189                 return -ENOMEM;
 190         perf_evsel__reset_stat_priv(evsel);
 191         return 0;
 192 }
 193
 194 static void perf_evsel__free_stat_priv(struct perf_evsel *evsel)
 195 {
 196         zfree(&evsel->priv);
 197 }
 198
 199 static int perf_evsel__alloc_prev_raw_counts(struct perf_evsel *evsel)
 200 {
 201         void *addr;
 202         size_t sz;
 203
 204         sz = sizeof(*evsel->counts) +
 205              (perf_evsel__nr_cpus(evsel) * sizeof(struct perf_counts_values));
 206
 207         addr = zalloc(sz);
 208         if (!addr)
 209                 return -ENOMEM;
 210
 211         evsel->prev_raw_counts =  addr;
 212
 213         return 0;
 214 }
 215
 216 static void perf_evsel__free_prev_raw_counts(struct perf_evsel *evsel)
 217 {
 218         zfree(&evsel->prev_raw_counts);
 219 }
 220
 221 static void perf_evlist__free_stats(struct perf_evlist *evlist)
 222 {
 223         struct perf_evsel *evsel;
 224
 225         evlist__for_each(evlist, evsel) {
 226                 perf_evsel__free_stat_priv(evsel);
 227                 perf_evsel__free_counts(evsel);
 228                 perf_evsel__free_prev_raw_counts(evsel);
 229         }
 230 }
 231
 232 static int perf_evlist__alloc_stats(struct perf_evlist *evlist, bool alloc_raw)
 233 {
 234         struct perf_evsel *evsel;
 235
 236         evlist__for_each(evlist, evsel) {
 237                 if (perf_evsel__alloc_stat_priv(evsel) < 0 ||
 238                     perf_evsel__alloc_counts(evsel, perf_evsel__nr_cpus(evsel)) < 0 ||
 239                     (alloc_raw && perf_evsel__alloc_prev_raw_counts(evsel) < 0))
 240                         goto out_free;
 241         }
 242
 243         return 0;
 244
 245 out_free:
 246         perf_evlist__free_stats(evlist);
 247         return -1;
 248 }
 249
 250 static struct stats runtime_nsecs_stats[MAX_NR_CPUS];
 251 static struct stats runtime_cycles_stats[MAX_NR_CPUS];
 252 static struct stats runtime_stalled_cycles_front_stats[MAX_NR_CPUS];
 253 static struct stats runtime_stalled_cycles_back_stats[MAX_NR_CPUS];
 254 static struct stats runtime_branches_stats[MAX_NR_CPUS];
 255 static struct stats runtime_cacherefs_stats[MAX_NR_CPUS];
 256 static struct stats runtime_l1_dcache_stats[MAX_NR_CPUS];
 257 static struct stats runtime_l1_icache_stats[MAX_NR_CPUS];
 258 static struct stats runtime_ll_cache_stats[MAX_NR_CPUS];
 259 static struct stats runtime_itlb_cache_stats[MAX_NR_CPUS];
 260 static struct stats runtime_dtlb_cache_stats[MAX_NR_CPUS];
 261 static struct stats runtime_cycles_in_tx_stats[MAX_NR_CPUS];
 262 static struct stats walltime_nsecs_stats;
 263 static struct stats runtime_transaction_stats[MAX_NR_CPUS];
 264 static struct stats runtime_elision_stats[MAX_NR_CPUS];
 265
 266 static void perf_stat__reset_stats(struct perf_evlist *evlist)
 267 {
 268         struct perf_evsel *evsel;
 269
 270         evlist__for_each(evlist, evsel) {
 271                 perf_evsel__reset_stat_priv(evsel);
 272                 perf_evsel__reset_counts(evsel, perf_evsel__nr_cpus(evsel));
 273         }
 274
 275         memset(runtime_nsecs_stats, 0, sizeof(runtime_nsecs_stats));
 276         memset(runtime_cycles_stats, 0, sizeof(runtime_cycles_stats));
 277         memset(runtime_stalled_cycles_front_stats, 0, sizeof(runtime_stalled_cycles_front_stats));
 278         memset(runtime_stalled_cycles_back_stats, 0, sizeof(runtime_stalled_cycles_back_stats));
 279         memset(runtime_branches_stats, 0, sizeof(runtime_branches_stats));
 280         memset(runtime_cacherefs_stats, 0, sizeof(runtime_cacherefs_stats));
 281         memset(runtime_l1_dcache_stats, 0, sizeof(runtime_l1_dcache_stats));
 282         memset(runtime_l1_icache_stats, 0, sizeof(runtime_l1_icache_stats));
 283         memset(runtime_ll_cache_stats, 0, sizeof(runtime_ll_cache_stats));
 284         memset(runtime_itlb_cache_stats, 0, sizeof(runtime_itlb_cache_stats));
 285         memset(runtime_dtlb_cache_stats, 0, sizeof(runtime_dtlb_cache_stats));
 286         memset(runtime_cycles_in_tx_stats, 0,
 287                         sizeof(runtime_cycles_in_tx_stats));
 288         memset(runtime_transaction_stats, 0,
 289                 sizeof(runtime_transaction_stats));
 290         memset(runtime_elision_stats, 0, sizeof(runtime_elision_stats));
 291         memset(&walltime_nsecs_stats, 0, sizeof(walltime_nsecs_stats));
 292 }
 293
 294 static int create_perf_stat_counter(struct perf_evsel *evsel)
 295 {
 296         struct perf_event_attr *attr = &evsel->attr;
 297
 298         if (scale)
 299                 attr->read_format = PERF_FORMAT_TOTAL_TIME_ENABLED |
 300                                     PERF_FORMAT_TOTAL_TIME_RUNNING;
 301
 302         attr->inherit = !no_inherit;
 303
 304         if (target__has_cpu(&target))
 305                 return perf_evsel__open_per_cpu(evsel, perf_evsel__cpus(evsel));
 306
 307         if (!target__has_task(&target) && perf_evsel__is_group_leader(evsel)) {
 308                 attr->disabled = 1;
 309                 if (!initial_delay)
 310                         attr->enable_on_exec = 1;
 311         }
 312
 313         return perf_evsel__open_per_thread(evsel, evsel_list->threads);
 314 }
 315
 316 /*
 317  * Does the counter have nsecs as a unit?
 318  */
 319 static inline int nsec_counter(struct perf_evsel *evsel)
 320 {
 321         if (perf_evsel__match(evsel, SOFTWARE, SW_CPU_CLOCK) ||
 322             perf_evsel__match(evsel, SOFTWARE, SW_TASK_CLOCK))
 323                 return 1;
 324
 325         return 0;
 326 }
 327
 328 static struct perf_evsel *nth_evsel(int n)
 329 {
 330         static struct perf_evsel **array;
 331         static int array_len;
 332         struct perf_evsel *ev;
 333         int j;
 334
 335         /* Assumes this only called when evsel_list does not change anymore. */
 336         if (!array) {
 337                 evlist__for_each(evsel_list, ev)
 338                         array_len++;
 339                 array = malloc(array_len * sizeof(void *));
 340                 if (!array)
 341                         exit(ENOMEM);
 342                 j = 0;
 343                 evlist__for_each(evsel_list, ev)
 344                         array[j++] = ev;
 345         }
 346         if (n < array_len)
 347                 return array[n];
 348         return NULL;
 349 }
 350
 351 /*
 352  * Update various tracking values we maintain to print
 353  * more semantic information such as miss/hit ratios,
 354  * instruction rates, etc:
 355  */
 356 static void update_shadow_stats(struct perf_evsel *counter, u64 *count)
 357 {
 358         if (perf_evsel__match(counter, SOFTWARE, SW_TASK_CLOCK))
 359                 update_stats(&runtime_nsecs_stats[0], count[0]);
 360         else if (perf_evsel__match(counter, HARDWARE, HW_CPU_CYCLES))
 361                 update_stats(&runtime_cycles_stats[0], count[0]);
 362         else if (transaction_run &&
 363                  perf_evsel__cmp(counter, nth_evsel(T_CYCLES_IN_TX)))
 364                 update_stats(&runtime_cycles_in_tx_stats[0], count[0]);
 365         else if (transaction_run &&
 366                  perf_evsel__cmp(counter, nth_evsel(T_TRANSACTION_START)))
 367                 update_stats(&runtime_transaction_stats[0], count[0]);
 368         else if (transaction_run &&
 369                  perf_evsel__cmp(counter, nth_evsel(T_ELISION_START)))
 370                 update_stats(&runtime_elision_stats[0], count[0]);
 371         else if (perf_evsel__match(counter, HARDWARE, HW_STALLED_CYCLES_FRONTEND))
 372                 update_stats(&runtime_stalled_cycles_front_stats[0], count[0]);
 373         else if (perf_evsel__match(counter, HARDWARE, HW_STALLED_CYCLES_BACKEND))
 374                 update_stats(&runtime_stalled_cycles_back_stats[0], count[0]);
 375         else if (perf_evsel__match(counter, HARDWARE, HW_BRANCH_INSTRUCTIONS))
 376                 update_stats(&runtime_branches_stats[0], count[0]);
 377         else if (perf_evsel__match(counter, HARDWARE, HW_CACHE_REFERENCES))
 378                 update_stats(&runtime_cacherefs_stats[0], count[0]);
 379         else if (perf_evsel__match(counter, HW_CACHE, HW_CACHE_L1D))
 380                 update_stats(&runtime_l1_dcache_stats[0], count[0]);
 381         else if (perf_evsel__match(counter, HW_CACHE, HW_CACHE_L1I))
 382                 update_stats(&runtime_l1_icache_stats[0], count[0]);
 383         else if (perf_evsel__match(counter, HW_CACHE, HW_CACHE_LL))
 384                 update_stats(&runtime_ll_cache_stats[0], count[0]);
 385         else if (perf_evsel__match(counter, HW_CACHE, HW_CACHE_DTLB))
 386                 update_stats(&runtime_dtlb_cache_stats[0], count[0]);
 387         else if (perf_evsel__match(counter, HW_CACHE, HW_CACHE_ITLB))
 388                 update_stats(&runtime_itlb_cache_stats[0], count[0]);
 389 }
 390
 391 static void zero_per_pkg(struct perf_evsel *counter)
 392 {
 393         if (counter->per_pkg_mask)
 394                 memset(counter->per_pkg_mask, 0, MAX_NR_CPUS);
 395 }
 396
 397 static int check_per_pkg(struct perf_evsel *counter, int cpu, bool *skip)
 398 {
 399         unsigned long *mask = counter->per_pkg_mask;
 400         struct cpu_map *cpus = perf_evsel__cpus(counter);
 401         int s;
 402
 403         *skip = false;
 404
 405         if (!counter->per_pkg)
 406                 return 0;
 407
 408         if (cpu_map__empty(cpus))
 409                 return 0;
 410
 411         if (!mask) {
 412                 mask = zalloc(MAX_NR_CPUS);
 413                 if (!mask)
 414                         return -ENOMEM;
 415
 416                 counter->per_pkg_mask = mask;
 417         }
 418
 419         s = cpu_map__get_socket(cpus, cpu);
 420         if (s < 0)
 421                 return -1;
 422
 423         *skip = test_and_set_bit(s, mask) == 1;
 424         return 0;
 425 }
 426
 427 static int read_cb(struct perf_evsel *evsel, int cpu, int thread __maybe_unused,
 428                    struct perf_counts_values *count)
 429 {
 430         struct perf_counts_values *aggr = &evsel->counts->aggr;
 431         static struct perf_counts_values zero;
 432         bool skip = false;
 433
 434         if (check_per_pkg(evsel, cpu, &skip)) {
 435                 pr_err("failed to read per-pkg counter\n");
 436                 return -1;
 437         }
 438
 439         if (skip)
 440                 count = &zero;
 441
 442         switch (aggr_mode) {
 443         case AGGR_CORE:
 444         case AGGR_SOCKET:
 445         case AGGR_NONE:
 446                 if (!evsel->snapshot)
 447                         perf_evsel__compute_deltas(evsel, cpu, count);
 448                 perf_counts_values__scale(count, scale, NULL);
 449                 evsel->counts->cpu[cpu] = *count;
 450                 update_shadow_stats(evsel, count->values);
 451                 break;
 452         case AGGR_GLOBAL:
 453                 aggr->val += count->val;
 454                 if (scale) {
 455                         aggr->ena += count->ena;
 456                         aggr->run += count->run;
 457                 }
 458         default:
 459                 break;
 460         }
 461
 462         return 0;
 463 }
 464
 465 static int read_counter(struct perf_evsel *counter);
 466
 467 /*
 468  * Read out the results of a single counter:
 469  * aggregate counts across CPUs in system-wide mode
 470  */
 471 static int read_counter_aggr(struct perf_evsel *counter)
 472 {
 473         struct perf_counts_values *aggr = &counter->counts->aggr;
 474         struct perf_stat *ps = counter->priv;
 475         u64 *count = counter->counts->aggr.values;
 476         int i;
 477
 478         aggr->val = aggr->ena = aggr->run = 0;
 479
 480         if (read_counter(counter))
 481                 return -1;
 482
 483         if (!counter->snapshot)
 484                 perf_evsel__compute_deltas(counter, -1, aggr);
 485         perf_counts_values__scale(aggr, scale, &counter->counts->scaled);
 486
 487         for (i = 0; i < 3; i++)
 488                 update_stats(&ps->res_stats[i], count[i]);
 489
 490         if (verbose) {
 491                 fprintf(output, "%s: %" PRIu64 " %" PRIu64 " %" PRIu64 "\n",
 492                         perf_evsel__name(counter), count[0], count[1], count[2]);
 493         }
 494
 495         /*
 496          * Save the full runtime - to allow normalization during printout:
 497          */
 498         update_shadow_stats(counter, count);
 499
 500         return 0;
 501 }
 502
 503 /*
 504  * Read out the results of a single counter:
 505  * do not aggregate counts across CPUs in system-wide mode
 506  */
 507 static int read_counter(struct perf_evsel *counter)
 508 {
 509         int nthreads = thread_map__nr(evsel_list->threads);
 510         int ncpus = perf_evsel__nr_cpus(counter);
 511         int cpu, thread;
 512
 513         if (counter->system_wide)
 514                 nthreads = 1;
 515
 516         if (counter->per_pkg)
 517                 zero_per_pkg(counter);
 518
 519         for (thread = 0; thread < nthreads; thread++) {
 520                 for (cpu = 0; cpu < ncpus; cpu++) {
 521                         if (perf_evsel__read_cb(counter, cpu, thread, read_cb))
 522                                 return -1;
 523                 }
 524         }
 525
 526         return 0;
 527 }
 528
 529 static void print_interval(void)
 530 {
 531         static int num_print_interval;
 532         struct perf_evsel *counter;
 533         struct perf_stat *ps;
 534         struct timespec ts, rs;
 535         char prefix[64];
 536
 537         if (aggr_mode == AGGR_GLOBAL) {
 538                 evlist__for_each(evsel_list, counter) {
 539                         ps = counter->priv;
 540                         memset(ps->res_stats, 0, sizeof(ps->res_stats));
 541                         read_counter_aggr(counter);
 542                 }
 543         } else  {
 544                 evlist__for_each(evsel_list, counter) {
 545                         ps = counter->priv;
 546                         memset(ps->res_stats, 0, sizeof(ps->res_stats));
 547                         read_counter(counter);
 548                 }
 549         }
 550
 551         clock_gettime(CLOCK_MONOTONIC, &ts);
 552         diff_timespec(&rs, &ts, &ref_time);
 553         sprintf(prefix, "%6lu.%09lu%s", rs.tv_sec, rs.tv_nsec, csv_sep);
 554
 555         if (num_print_interval == 0 && !csv_output) {
 556                 switch (aggr_mode) {
 557                 case AGGR_SOCKET:
 558                         fprintf(output, "#           time socket cpus             counts %*s events\n", unit_width, "unit");
 559                         break;
 560                 case AGGR_CORE:
 561                         fprintf(output, "#           time core         cpus             counts %*s events\n", unit_width, "unit");
 562                         break;
 563                 case AGGR_NONE:
 564                         fprintf(output, "#           time CPU                counts %*s events\n", unit_width, "unit");
 565                         break;
 566                 case AGGR_GLOBAL:
 567                 default:
 568                         fprintf(output, "#           time             counts %*s events\n", unit_width, "unit");
 569                 }
 570         }
 571
 572         if (++num_print_interval == 25)
 573                 num_print_interval = 0;
 574
 575         switch (aggr_mode) {
 576         case AGGR_CORE:
 577         case AGGR_SOCKET:
 578                 print_aggr(prefix);
 579                 break;
 580         case AGGR_NONE:
 581                 evlist__for_each(evsel_list, counter)
 582                         print_counter(counter, prefix);
 583                 break;
 584         case AGGR_GLOBAL:
 585         default:
 586                 evlist__for_each(evsel_list, counter)
 587                         print_counter_aggr(counter, prefix);
 588         }
 589
 590         fflush(output);
 591 }
 592
 593 static void handle_initial_delay(void)
 594 {
 595         struct perf_evsel *counter;
 596
 597         if (initial_delay) {
 598                 const int ncpus = cpu_map__nr(evsel_list->cpus),
 599                         nthreads = thread_map__nr(evsel_list->threads);
 600
 601                 usleep(initial_delay * 1000);
 602                 evlist__for_each(evsel_list, counter)
 603                         perf_evsel__enable(counter, ncpus, nthreads);
 604         }
 605 }
 606
 607 static volatile int workload_exec_errno;
 608
 609 /*
 610  * perf_evlist__prepare_workload will send a SIGUSR1
 611  * if the fork fails, since we asked by setting its
 612  * want_signal to true.
 613  */
 614 static void workload_exec_failed_signal(int signo __maybe_unused, siginfo_t *info,
 615                                         void *ucontext __maybe_unused)
 616 {
 617         workload_exec_errno = info->si_value.sival_int;
 618 }
 619
 620 static int __run_perf_stat(int argc, const char **argv)
 621 {
 622         char msg[512];
 623         unsigned long long t0, t1;
 624         struct perf_evsel *counter;
 625         struct timespec ts;
 626         size_t l;
 627         int status = 0;
 628         const bool forks = (argc > 0);
 629
 630         if (interval) {
 631                 ts.tv_sec  = interval / 1000;
 632                 ts.tv_nsec = (interval % 1000) * 1000000;
 633         } else {
 634                 ts.tv_sec  = 1;
 635                 ts.tv_nsec = 0;
 636         }
 637
 638         if (forks) {
 639                 if (perf_evlist__prepare_workload(evsel_list, &target, argv, false,
 640                                                   workload_exec_failed_signal) < 0) {
 641                         perror("failed to prepare workload");
 642                         return -1;
 643                 }
 644                 child_pid = evsel_list->workload.pid;
 645         }
 646
 647         if (group)
 648                 perf_evlist__set_leader(evsel_list);
 649
 650         evlist__for_each(evsel_list, counter) {
 651                 if (create_perf_stat_counter(counter) < 0) {
 652                         /*
 653                          * PPC returns ENXIO for HW counters until 2.6.37
 654                          * (behavior changed with commit b0a873e).
 655                          */
 656                         if (errno == EINVAL || errno == ENOSYS ||
 657                             errno == ENOENT || errno == EOPNOTSUPP ||
 658                             errno == ENXIO) {
 659                                 if (verbose)
 660                                         ui__warning("%s event is not supported by the kernel.\n",
 661                                                     perf_evsel__name(counter));
 662                                 counter->supported = false;
 663                                 continue;
 664                         }
 665
 666                         perf_evsel__open_strerror(counter, &target,
 667                                                   errno, msg, sizeof(msg));
 668                         ui__error("%s\n", msg);
 669
 670                         if (child_pid != -1)
 671                                 kill(child_pid, SIGTERM);
 672
 673                         return -1;
 674                 }
 675                 counter->supported = true;
 676
 677                 l = strlen(counter->unit);
 678                 if (l > unit_width)
 679                         unit_width = l;
 680         }
 681
 682         if (perf_evlist__apply_filters(evsel_list)) {
 683                 error("failed to set filter with %d (%s)\n", errno,
 684                         strerror_r(errno, msg, sizeof(msg)));
 685                 return -1;
 686         }
 687
 688         /*
 689          * Enable counters and exec the command:
 690          */
 691         t0 = rdclock();
 692         clock_gettime(CLOCK_MONOTONIC, &ref_time);
 693
 694         if (forks) {
 695                 perf_evlist__start_workload(evsel_list);
 696                 handle_initial_delay();
 697
 698                 if (interval) {
 699                         while (!waitpid(child_pid, &status, WNOHANG)) {
 700                                 nanosleep(&ts, NULL);
 701                                 print_interval();
 702                         }
 703                 }
 704                 wait(&status);
 705
 706                 if (workload_exec_errno) {
 707                         const char *emsg = strerror_r(workload_exec_errno, msg, sizeof(msg));
 708                         pr_err("Workload failed: %s\n", emsg);
 709                         return -1;
 710                 }
 711
 712                 if (WIFSIGNALED(status))
 713                         psignal(WTERMSIG(status), argv[0]);
 714         } else {
 715                 handle_initial_delay();
 716                 while (!done) {
 717                         nanosleep(&ts, NULL);
 718                         if (interval)
 719                                 print_interval();
 720                 }
 721         }
 722
 723         t1 = rdclock();
 724
 725         update_stats(&walltime_nsecs_stats, t1 - t0);
 726
 727         if (aggr_mode == AGGR_GLOBAL) {
 728                 evlist__for_each(evsel_list, counter) {
 729                         read_counter_aggr(counter);
 730                         perf_evsel__close_fd(counter, perf_evsel__nr_cpus(counter),
 731                                              thread_map__nr(evsel_list->threads));
 732                 }
 733         } else {
 734                 evlist__for_each(evsel_list, counter) {
 735                         read_counter(counter);
 736                         perf_evsel__close_fd(counter, perf_evsel__nr_cpus(counter), 1);
 737                 }
 738         }
 739
 740         return WEXITSTATUS(status);
 741 }
 742
 743 static int run_perf_stat(int argc, const char **argv)
 744 {
 745         int ret;
 746
 747         if (pre_cmd) {
 748                 ret = system(pre_cmd);
 749                 if (ret)
 750                         return ret;
 751         }
 752
 753         if (sync_run)
 754                 sync();
 755
 756         ret = __run_perf_stat(argc, argv);
 757         if (ret)
 758                 return ret;
 759
 760         if (post_cmd) {
 761                 ret = system(post_cmd);
 762                 if (ret)
 763                         return ret;
 764         }
 765
 766         return ret;
 767 }
 768
 769 static void print_noise_pct(double total, double avg)
 770 {
 771         double pct = rel_stddev_stats(total, avg);
 772
 773         if (csv_output)
 774                 fprintf(output, "%s%.2f%%", csv_sep, pct);
 775         else if (pct)
 776                 fprintf(output, "  ( +-%6.2f%% )", pct);
 777 }
 778
 779 static void print_noise(struct perf_evsel *evsel, double avg)
 780 {
 781         struct perf_stat *ps;
 782
 783         if (run_count == 1)
 784                 return;
 785
 786         ps = evsel->priv;
 787         print_noise_pct(stddev_stats(&ps->res_stats[0]), avg);
 788 }
 789
 790 static void aggr_printout(struct perf_evsel *evsel, int id, int nr)
 791 {
 792         switch (aggr_mode) {
 793         case AGGR_CORE:
 794                 fprintf(output, "S%d-C%*d%s%*d%s",
 795                         cpu_map__id_to_socket(id),
 796                         csv_output ? 0 : -8,
 797                         cpu_map__id_to_cpu(id),
 798                         csv_sep,
 799                         csv_output ? 0 : 4,
 800                         nr,
 801                         csv_sep);
 802                 break;
 803         case AGGR_SOCKET:
 804                 fprintf(output, "S%*d%s%*d%s",
 805                         csv_output ? 0 : -5,
 806                         id,
 807                         csv_sep,
 808                         csv_output ? 0 : 4,
 809                         nr,
 810                         csv_sep);
 811                         break;
 812         case AGGR_NONE:
 813                 fprintf(output, "CPU%*d%s",
 814                         csv_output ? 0 : -4,
 815                         perf_evsel__cpus(evsel)->map[id], csv_sep);
 816                 break;
 817         case AGGR_GLOBAL:
 818         default:
 819                 break;
 820         }
 821 }
 822
 823 static void nsec_printout(int id, int nr, struct perf_evsel *evsel, double avg)
 824 {
 825         double msecs = avg / 1e6;
 826         const char *fmt_v, *fmt_n;
 827         char name[25];
 828
 829         fmt_v = csv_output ? "%.6f%s" : "%18.6f%s";
 830         fmt_n = csv_output ? "%s" : "%-25s";
 831
 832         aggr_printout(evsel, id, nr);
 833
 834         scnprintf(name, sizeof(name), "%s%s",
 835                   perf_evsel__name(evsel), csv_output ? "" : " (msec)");
 836
 837         fprintf(output, fmt_v, msecs, csv_sep);
 838
 839         if (csv_output)
 840                 fprintf(output, "%s%s", evsel->unit, csv_sep);
 841         else
 842                 fprintf(output, "%-*s%s", unit_width, evsel->unit, csv_sep);
 843
 844         fprintf(output, fmt_n, name);
 845
 846         if (evsel->cgrp)
 847                 fprintf(output, "%s%s", csv_sep, evsel->cgrp->name);
 848
 849         if (csv_output || interval)
 850                 return;
 851
 852         if (perf_evsel__match(evsel, SOFTWARE, SW_TASK_CLOCK))
 853                 fprintf(output, " # %8.3f CPUs utilized          ",
 854                         avg / avg_stats(&walltime_nsecs_stats));
 855         else
 856                 fprintf(output, "                                   ");
 857 }
 858
 859 /* used for get_ratio_color() */
 860 enum grc_type {
 861         GRC_STALLED_CYCLES_FE,
 862         GRC_STALLED_CYCLES_BE,
 863         GRC_CACHE_MISSES,
 864         GRC_MAX_NR
 865 };
 866
 867 static const char *get_ratio_color(enum grc_type type, double ratio)
 868 {
 869         static const double grc_table[GRC_MAX_NR][3] = {
 870                 [GRC_STALLED_CYCLES_FE] = { 50.0, 30.0, 10.0 },
 871                 [GRC_STALLED_CYCLES_BE] = { 75.0, 50.0, 20.0 },
 872                 [GRC_CACHE_MISSES]      = { 20.0, 10.0, 5.0 },
 873         };
 874         const char *color = PERF_COLOR_NORMAL;
 875
 876         if (ratio > grc_table[type][0])
 877                 color = PERF_COLOR_RED;
 878         else if (ratio > grc_table[type][1])
 879                 color = PERF_COLOR_MAGENTA;
 880         else if (ratio > grc_table[type][2])
 881                 color = PERF_COLOR_YELLOW;
 882
 883         return color;
 884 }
 885
 886 static void print_stalled_cycles_frontend(int cpu,
 887                                           struct perf_evsel *evsel
 888                                           __maybe_unused, double avg)
 889 {
 890         double total, ratio = 0.0;
 891         const char *color;
 892
 893         total = avg_stats(&runtime_cycles_stats[cpu]);
 894
 895         if (total)
 896                 ratio = avg / total * 100.0;
 897
 898         color = get_ratio_color(GRC_STALLED_CYCLES_FE, ratio);
 899
 900         fprintf(output, " #  ");
 901         color_fprintf(output, color, "%6.2f%%", ratio);
 902         fprintf(output, " frontend cycles idle   ");
 903 }
 904
 905 static void print_stalled_cycles_backend(int cpu,
 906                                          struct perf_evsel *evsel
 907                                          __maybe_unused, double avg)
 908 {
 909         double total, ratio = 0.0;
 910         const char *color;
 911
 912         total = avg_stats(&runtime_cycles_stats[cpu]);
 913
 914         if (total)
 915                 ratio = avg / total * 100.0;
 916
 917         color = get_ratio_color(GRC_STALLED_CYCLES_BE, ratio);
 918
 919         fprintf(output, " #  ");
 920         color_fprintf(output, color, "%6.2f%%", ratio);
 921         fprintf(output, " backend  cycles idle   ");
 922 }
 923
 924 static void print_branch_misses(int cpu,
 925                                 struct perf_evsel *evsel __maybe_unused,
 926                                 double avg)
 927 {
 928         double total, ratio = 0.0;
 929         const char *color;
 930
 931         total = avg_stats(&runtime_branches_stats[cpu]);
 932
 933         if (total)
 934                 ratio = avg / total * 100.0;
 935
 936         color = get_ratio_color(GRC_CACHE_MISSES, ratio);
 937
 938         fprintf(output, " #  ");
 939         color_fprintf(output, color, "%6.2f%%", ratio);
 940         fprintf(output, " of all branches        ");
 941 }
 942
 943 static void print_l1_dcache_misses(int cpu,
 944                                    struct perf_evsel *evsel __maybe_unused,
 945                                    double avg)
 946 {
 947         double total, ratio = 0.0;
 948         const char *color;
 949
 950         total = avg_stats(&runtime_l1_dcache_stats[cpu]);
 951
 952         if (total)
 953                 ratio = avg / total * 100.0;
 954
 955         color = get_ratio_color(GRC_CACHE_MISSES, ratio);
 956
 957         fprintf(output, " #  ");
 958         color_fprintf(output, color, "%6.2f%%", ratio);
 959         fprintf(output, " of all L1-dcache hits  ");
 960 }
 961
 962 static void print_l1_icache_misses(int cpu,
 963                                    struct perf_evsel *evsel __maybe_unused,
 964                                    double avg)
 965 {
 966         double total, ratio = 0.0;
 967         const char *color;
 968
 969         total = avg_stats(&runtime_l1_icache_stats[cpu]);
 970
 971         if (total)
 972                 ratio = avg / total * 100.0;
 973
 974         color = get_ratio_color(GRC_CACHE_MISSES, ratio);
 975
 976         fprintf(output, " #  ");
 977         color_fprintf(output, color, "%6.2f%%", ratio);
 978         fprintf(output, " of all L1-icache hits  ");
 979 }
 980
 981 static void print_dtlb_cache_misses(int cpu,
 982                                     struct perf_evsel *evsel __maybe_unused,
 983                                     double avg)
 984 {
 985         double total, ratio = 0.0;
 986         const char *color;
 987
 988         total = avg_stats(&runtime_dtlb_cache_stats[cpu]);
 989
 990         if (total)
 991                 ratio = avg / total * 100.0;
 992
 993         color = get_ratio_color(GRC_CACHE_MISSES, ratio);
 994
 995         fprintf(output, " #  ");
 996         color_fprintf(output, color, "%6.2f%%", ratio);
 997         fprintf(output, " of all dTLB cache hits ");
 998 }
 999
1000 static void print_itlb_cache_misses(int cpu,
1001                                     struct perf_evsel *evsel __maybe_unused,
1002                                     double avg)
1003 {
1004         double total, ratio = 0.0;
1005         const char *color;
1006
1007         total = avg_stats(&runtime_itlb_cache_stats[cpu]);
1008
1009         if (total)
1010                 ratio = avg / total * 100.0;
1011
1012         color = get_ratio_color(GRC_CACHE_MISSES, ratio);
1013
1014         fprintf(output, " #  ");
1015         color_fprintf(output, color, "%6.2f%%", ratio);
1016         fprintf(output, " of all iTLB cache hits ");
1017 }
1018
1019 static void print_ll_cache_misses(int cpu,
1020                                   struct perf_evsel *evsel __maybe_unused,
1021                                   double avg)
1022 {
1023         double total, ratio = 0.0;
1024         const char *color;
1025
1026         total = avg_stats(&runtime_ll_cache_stats[cpu]);
1027
1028         if (total)
1029                 ratio = avg / total * 100.0;
1030
1031         color = get_ratio_color(GRC_CACHE_MISSES, ratio);
1032
1033         fprintf(output, " #  ");
1034         color_fprintf(output, color, "%6.2f%%", ratio);
1035         fprintf(output, " of all LL-cache hits   ");
1036 }
1037
1038 static void abs_printout(int id, int nr, struct perf_evsel *evsel, double avg)
1039 {
1040         double total, ratio = 0.0, total2;
1041         double sc =  evsel->scale;
1042         const char *fmt;
1043         int cpu = cpu_map__id_to_cpu(id);
1044
1045         if (csv_output) {
1046                 fmt = sc != 1.0 ?  "%.2f%s" : "%.0f%s";
1047         } else {
1048                 if (big_num)
1049                         fmt = sc != 1.0 ? "%'18.2f%s" : "%'18.0f%s";
1050                 else
1051                         fmt = sc != 1.0 ? "%18.2f%s" : "%18.0f%s";
1052         }
1053
1054         aggr_printout(evsel, id, nr);
1055
1056         if (aggr_mode == AGGR_GLOBAL)
1057                 cpu = 0;
1058
1059         fprintf(output, fmt, avg, csv_sep);
1060
1061         if (evsel->unit)
1062                 fprintf(output, "%-*s%s",
1063                         csv_output ? 0 : unit_width,
1064                         evsel->unit, csv_sep);
1065
1066         fprintf(output, "%-*s", csv_output ? 0 : 25, perf_evsel__name(evsel));
1067
1068         if (evsel->cgrp)
1069                 fprintf(output, "%s%s", csv_sep, evsel->cgrp->name);
1070
1071         if (csv_output || interval)
1072                 return;
1073
1074         if (perf_evsel__match(evsel, HARDWARE, HW_INSTRUCTIONS)) {
1075                 total = avg_stats(&runtime_cycles_stats[cpu]);
1076                 if (total) {
1077                         ratio = avg / total;
1078                         fprintf(output, " #   %5.2f  insns per cycle        ", ratio);
1079                 }
1080                 total = avg_stats(&runtime_stalled_cycles_front_stats[cpu]);
1081                 total = max(total, avg_stats(&runtime_stalled_cycles_back_stats[cpu]));
1082
1083                 if (total && avg) {
1084                         ratio = total / avg;
1085                         fprintf(output, "\n");
1086                         if (aggr_mode == AGGR_NONE)
1087                                 fprintf(output, "        ");
1088                         fprintf(output, "                                                  #   %5.2f  stalled cycles per insn", ratio);
1089                 }
1090
1091         } else if (perf_evsel__match(evsel, HARDWARE, HW_BRANCH_MISSES) &&
1092                         runtime_branches_stats[cpu].n != 0) {
1093                 print_branch_misses(cpu, evsel, avg);
1094         } else if (
1095                 evsel->attr.type == PERF_TYPE_HW_CACHE &&
1096                 evsel->attr.config ==  ( PERF_COUNT_HW_CACHE_L1D |
1097                                         ((PERF_COUNT_HW_CACHE_OP_READ) << 8) |
1098                                         ((PERF_COUNT_HW_CACHE_RESULT_MISS) << 16)) &&
1099                         runtime_l1_dcache_stats[cpu].n != 0) {
1100                 print_l1_dcache_misses(cpu, evsel, avg);
1101         } else if (
1102                 evsel->attr.type == PERF_TYPE_HW_CACHE &&
1103                 evsel->attr.config ==  ( PERF_COUNT_HW_CACHE_L1I |
1104                                         ((PERF_COUNT_HW_CACHE_OP_READ) << 8) |
1105                                         ((PERF_COUNT_HW_CACHE_RESULT_MISS) << 16)) &&
1106                         runtime_l1_icache_stats[cpu].n != 0) {
1107                 print_l1_icache_misses(cpu, evsel, avg);
1108         } else if (
1109                 evsel->attr.type == PERF_TYPE_HW_CACHE &&
1110                 evsel->attr.config ==  ( PERF_COUNT_HW_CACHE_DTLB |
1111                                         ((PERF_COUNT_HW_CACHE_OP_READ) << 8) |
1112                                         ((PERF_COUNT_HW_CACHE_RESULT_MISS) << 16)) &&
1113                         runtime_dtlb_cache_stats[cpu].n != 0) {
1114                 print_dtlb_cache_misses(cpu, evsel, avg);
1115         } else if (
1116                 evsel->attr.type == PERF_TYPE_HW_CACHE &&
1117                 evsel->attr.config ==  ( PERF_COUNT_HW_CACHE_ITLB |
1118                                         ((PERF_COUNT_HW_CACHE_OP_READ) << 8) |
1119                                         ((PERF_COUNT_HW_CACHE_RESULT_MISS) << 16)) &&
1120                         runtime_itlb_cache_stats[cpu].n != 0) {
1121                 print_itlb_cache_misses(cpu, evsel, avg);
1122         } else if (
1123                 evsel->attr.type == PERF_TYPE_HW_CACHE &&
1124                 evsel->attr.config ==  ( PERF_COUNT_HW_CACHE_LL |
1125                                         ((PERF_COUNT_HW_CACHE_OP_READ) << 8) |
1126                                         ((PERF_COUNT_HW_CACHE_RESULT_MISS) << 16)) &&
1127                         runtime_ll_cache_stats[cpu].n != 0) {
1128                 print_ll_cache_misses(cpu, evsel, avg);
1129         } else if (perf_evsel__match(evsel, HARDWARE, HW_CACHE_MISSES) &&
1130                         runtime_cacherefs_stats[cpu].n != 0) {
1131                 total = avg_stats(&runtime_cacherefs_stats[cpu]);
1132
1133                 if (total)
1134                         ratio = avg * 100 / total;
1135
1136                 fprintf(output, " # %8.3f %% of all cache refs    ", ratio);
1137
1138         } else if (perf_evsel__match(evsel, HARDWARE, HW_STALLED_CYCLES_FRONTEND)) {
1139                 print_stalled_cycles_frontend(cpu, evsel, avg);
1140         } else if (perf_evsel__match(evsel, HARDWARE, HW_STALLED_CYCLES_BACKEND)) {
1141                 print_stalled_cycles_backend(cpu, evsel, avg);
1142         } else if (perf_evsel__match(evsel, HARDWARE, HW_CPU_CYCLES)) {
1143                 total = avg_stats(&runtime_nsecs_stats[cpu]);
1144
1145                 if (total) {
1146                         ratio = avg / total;
1147                         fprintf(output, " # %8.3f GHz                    ", ratio);
1148                 }
1149         } else if (transaction_run &&
1150                    perf_evsel__cmp(evsel, nth_evsel(T_CYCLES_IN_TX))) {
1151                 total = avg_stats(&runtime_cycles_stats[cpu]);
1152                 if (total)
1153                         fprintf(output,
1154                                 " #   %5.2f%% transactional cycles   ",
1155                                 100.0 * (avg / total));
1156         } else if (transaction_run &&
1157                    perf_evsel__cmp(evsel, nth_evsel(T_CYCLES_IN_TX_CP))) {
1158                 total = avg_stats(&runtime_cycles_stats[cpu]);
1159                 total2 = avg_stats(&runtime_cycles_in_tx_stats[cpu]);
1160                 if (total2 < avg)
1161                         total2 = avg;
1162                 if (total)
1163                         fprintf(output,
1164                                 " #   %5.2f%% aborted cycles         ",
1165                                 100.0 * ((total2-avg) / total));
1166         } else if (transaction_run &&
1167                    perf_evsel__cmp(evsel, nth_evsel(T_TRANSACTION_START)) &&
1168                    avg > 0 &&
1169                    runtime_cycles_in_tx_stats[cpu].n != 0) {
1170                 total = avg_stats(&runtime_cycles_in_tx_stats[cpu]);
1171
1172                 if (total)
1173                         ratio = total / avg;
1174
1175                 fprintf(output, " # %8.0f cycles / transaction   ", ratio);
1176         } else if (transaction_run &&
1177                    perf_evsel__cmp(evsel, nth_evsel(T_ELISION_START)) &&
1178                    avg > 0 &&
1179                    runtime_cycles_in_tx_stats[cpu].n != 0) {
1180                 total = avg_stats(&runtime_cycles_in_tx_stats[cpu]);
1181
1182                 if (total)
1183                         ratio = total / avg;
1184
1185                 fprintf(output, " # %8.0f cycles / elision       ", ratio);
1186         } else if (runtime_nsecs_stats[cpu].n != 0) {
1187                 char unit = 'M';
1188
1189                 total = avg_stats(&runtime_nsecs_stats[cpu]);
1190
1191                 if (total)
1192                         ratio = 1000.0 * avg / total;
1193                 if (ratio < 0.001) {
1194                         ratio *= 1000;
1195                         unit = 'K';
1196                 }
1197
1198                 fprintf(output, " # %8.3f %c/sec                  ", ratio, unit);
1199         } else {
1200                 fprintf(output, "                                   ");
1201         }
1202 }
1203
1204 static void print_aggr(char *prefix)
1205 {
1206         struct perf_evsel *counter;
1207         int cpu, cpu2, s, s2, id, nr;
1208         double uval;
1209         u64 ena, run, val;
1210
1211         if (!(aggr_map || aggr_get_id))
1212                 return;
1213
1214         for (s = 0; s < aggr_map->nr; s++) {
1215                 id = aggr_map->map[s];
1216                 evlist__for_each(evsel_list, counter) {
1217                         val = ena = run = 0;
1218                         nr = 0;
1219                         for (cpu = 0; cpu < perf_evsel__nr_cpus(counter); cpu++) {
1220                                 cpu2 = perf_evsel__cpus(counter)->map[cpu];
1221                                 s2 = aggr_get_id(evsel_list->cpus, cpu2);
1222                                 if (s2 != id)
1223                                         continue;
1224                                 val += counter->counts->cpu[cpu].val;
1225                                 ena += counter->counts->cpu[cpu].ena;
1226                                 run += counter->counts->cpu[cpu].run;
1227                                 nr++;
1228                         }
1229                         if (prefix)
1230                                 fprintf(output, "%s", prefix);
1231
1232                         if (run == 0 || ena == 0) {
1233                                 aggr_printout(counter, id, nr);
1234
1235                                 fprintf(output, "%*s%s",
1236                                         csv_output ? 0 : 18,
1237                                         counter->supported ? CNTR_NOT_COUNTED : CNTR_NOT_SUPPORTED,
1238                                         csv_sep);
1239
1240                                 fprintf(output, "%-*s%s",
1241                                         csv_output ? 0 : unit_width,
1242                                         counter->unit, csv_sep);
1243
1244                                 fprintf(output, "%*s",
1245                                         csv_output ? 0 : -25,
1246                                         perf_evsel__name(counter));
1247
1248                                 if (counter->cgrp)
1249                                         fprintf(output, "%s%s",
1250                                                 csv_sep, counter->cgrp->name);
1251
1252                                 fputc('\n', output);
1253                                 continue;
1254                         }
1255                         uval = val * counter->scale;
1256
1257                         if (nsec_counter(counter))
1258                                 nsec_printout(id, nr, counter, uval);
1259                         else
1260                                 abs_printout(id, nr, counter, uval);
1261
1262                         if (!csv_output) {
1263                                 print_noise(counter, 1.0);
1264
1265                                 if (run != ena)
1266                                         fprintf(output, "  (%.2f%%)",
1267                                                 100.0 * run / ena);
1268                         }
1269                         fputc('\n', output);
1270                 }
1271         }
1272 }
1273
1274 /*
1275  * Print out the results of a single counter:
1276  * aggregated counts in system-wide mode
1277  */
1278 static void print_counter_aggr(struct perf_evsel *counter, char *prefix)
1279 {
1280         struct perf_stat *ps = counter->priv;
1281         double avg = avg_stats(&ps->res_stats[0]);
1282         int scaled = counter->counts->scaled;
1283         double uval;
1284
1285         if (prefix)
1286                 fprintf(output, "%s", prefix);
1287
1288         if (scaled == -1) {
1289                 fprintf(output, "%*s%s",
1290                         csv_output ? 0 : 18,
1291                         counter->supported ? CNTR_NOT_COUNTED : CNTR_NOT_SUPPORTED,
1292                         csv_sep);
1293                 fprintf(output, "%-*s%s",
1294                         csv_output ? 0 : unit_width,
1295                         counter->unit, csv_sep);
1296                 fprintf(output, "%*s",
1297                         csv_output ? 0 : -25,
1298                         perf_evsel__name(counter));
1299
1300                 if (counter->cgrp)
1301                         fprintf(output, "%s%s", csv_sep, counter->cgrp->name);
1302
1303                 fputc('\n', output);
1304                 return;
1305         }
1306
1307         uval = avg * counter->scale;
1308
1309         if (nsec_counter(counter))
1310                 nsec_printout(-1, 0, counter, uval);
1311         else
1312                 abs_printout(-1, 0, counter, uval);
1313
1314         print_noise(counter, avg);
1315
1316         if (csv_output) {
1317                 fputc('\n', output);
1318                 return;
1319         }
1320
1321         if (scaled) {
1322                 double avg_enabled, avg_running;
1323
1324                 avg_enabled = avg_stats(&ps->res_stats[1]);
1325                 avg_running = avg_stats(&ps->res_stats[2]);
1326
1327                 fprintf(output, " [%5.2f%%]", 100 * avg_running / avg_enabled);
1328         }
1329         fprintf(output, "\n");
1330 }
1331
1332 /*
1333  * Print out the results of a single counter:
1334  * does not use aggregated count in system-wide
1335  */
1336 static void print_counter(struct perf_evsel *counter, char *prefix)
1337 {
1338         u64 ena, run, val;
1339         double uval;
1340         int cpu;
1341
1342         for (cpu = 0; cpu < perf_evsel__nr_cpus(counter); cpu++) {
1343                 val = counter->counts->cpu[cpu].val;
1344                 ena = counter->counts->cpu[cpu].ena;
1345                 run = counter->counts->cpu[cpu].run;
1346
1347                 if (prefix)
1348                         fprintf(output, "%s", prefix);
1349
1350                 if (run == 0 || ena == 0) {
1351                         fprintf(output, "CPU%*d%s%*s%s",
1352                                 csv_output ? 0 : -4,
1353                                 perf_evsel__cpus(counter)->map[cpu], csv_sep,
1354                                 csv_output ? 0 : 18,
1355                                 counter->supported ? CNTR_NOT_COUNTED : CNTR_NOT_SUPPORTED,
1356                                 csv_sep);
1357
1358                                 fprintf(output, "%-*s%s",
1359                                         csv_output ? 0 : unit_width,
1360                                         counter->unit, csv_sep);
1361
1362                                 fprintf(output, "%*s",
1363                                         csv_output ? 0 : -25,
1364                                         perf_evsel__name(counter));
1365
1366                         if (counter->cgrp)
1367                                 fprintf(output, "%s%s",
1368                                         csv_sep, counter->cgrp->name);
1369
1370                         fputc('\n', output);
1371                         continue;
1372                 }
1373
1374                 uval = val * counter->scale;
1375
1376                 if (nsec_counter(counter))
1377                         nsec_printout(cpu, 0, counter, uval);
1378                 else
1379                         abs_printout(cpu, 0, counter, uval);
1380
1381                 if (!csv_output) {
1382                         print_noise(counter, 1.0);
1383
1384                         if (run != ena)
1385                                 fprintf(output, "  (%.2f%%)",
1386                                         100.0 * run / ena);
1387                 }
1388                 fputc('\n', output);
1389         }
1390 }
1391
1392 static void print_stat(int argc, const char **argv)
1393 {
1394         struct perf_evsel *counter;
1395         int i;
1396
1397         fflush(stdout);
1398
1399         if (!csv_output) {
1400                 fprintf(output, "\n");
1401                 fprintf(output, " Performance counter stats for ");
1402                 if (target.system_wide)
1403                         fprintf(output, "\'system wide");
1404                 else if (target.cpu_list)
1405                         fprintf(output, "\'CPU(s) %s", target.cpu_list);
1406                 else if (!target__has_task(&target)) {
1407                         fprintf(output, "\'%s", argv[0]);
1408                         for (i = 1; i < argc; i++)
1409                                 fprintf(output, " %s", argv[i]);
1410                 } else if (target.pid)
1411                         fprintf(output, "process id \'%s", target.pid);
1412                 else
1413                         fprintf(output, "thread id \'%s", target.tid);
1414
1415                 fprintf(output, "\'");
1416                 if (run_count > 1)
1417                         fprintf(output, " (%d runs)", run_count);
1418                 fprintf(output, ":\n\n");
1419         }
1420
1421         switch (aggr_mode) {
1422         case AGGR_CORE:
1423         case AGGR_SOCKET:
1424                 print_aggr(NULL);
1425                 break;
1426         case AGGR_GLOBAL:
1427                 evlist__for_each(evsel_list, counter)
1428                         print_counter_aggr(counter, NULL);
1429                 break;
1430         case AGGR_NONE:
1431                 evlist__for_each(evsel_list, counter)
1432                         print_counter(counter, NULL);
1433                 break;
1434         default:
1435                 break;
1436         }
1437
1438         if (!csv_output) {
1439                 if (!null_run)
1440                         fprintf(output, "\n");
1441                 fprintf(output, " %17.9f seconds time elapsed",
1442                                 avg_stats(&walltime_nsecs_stats)/1e9);
1443                 if (run_count > 1) {
1444                         fprintf(output, "                                        ");
1445                         print_noise_pct(stddev_stats(&walltime_nsecs_stats),
1446                                         avg_stats(&walltime_nsecs_stats));
1447                 }
1448                 fprintf(output, "\n\n");
1449         }
1450 }
1451
1452 static volatile int signr = -1;
1453
1454 static void skip_signal(int signo)
1455 {
1456         if ((child_pid == -1) || interval)
1457                 done = 1;
1458
1459         signr = signo;
1460         /*
1461          * render child_pid harmless
1462          * won't send SIGTERM to a random
1463          * process in case of race condition
1464          * and fast PID recycling
1465          */
1466         child_pid = -1;
1467 }
1468
1469 static void sig_atexit(void)
1470 {
1471         sigset_t set, oset;
1472
1473         /*
1474          * avoid race condition with SIGCHLD handler
1475          * in skip_signal() which is modifying child_pid
1476          * goal is to avoid send SIGTERM to a random
1477          * process
1478          */
1479         sigemptyset(&set);
1480         sigaddset(&set, SIGCHLD);
1481         sigprocmask(SIG_BLOCK, &set, &oset);
1482
1483         if (child_pid != -1)
1484                 kill(child_pid, SIGTERM);
1485
1486         sigprocmask(SIG_SETMASK, &oset, NULL);
1487
1488         if (signr == -1)
1489                 return;
1490
1491         signal(signr, SIG_DFL);
1492         kill(getpid(), signr);
1493 }
1494
1495 static int stat__set_big_num(const struct option *opt __maybe_unused,
1496                              const char *s __maybe_unused, int unset)
1497 {
1498         big_num_opt = unset ? 0 : 1;
1499         return 0;
1500 }
1501
1502 static int perf_stat_init_aggr_mode(void)
1503 {
1504         switch (aggr_mode) {
1505         case AGGR_SOCKET:
1506                 if (cpu_map__build_socket_map(evsel_list->cpus, &aggr_map)) {
1507                         perror("cannot build socket map");
1508                         return -1;
1509                 }
1510                 aggr_get_id = cpu_map__get_socket;
1511                 break;
1512         case AGGR_CORE:
1513                 if (cpu_map__build_core_map(evsel_list->cpus, &aggr_map)) {
1514                         perror("cannot build core map");
1515                         return -1;
1516                 }
1517                 aggr_get_id = cpu_map__get_core;
1518                 break;
1519         case AGGR_NONE:
1520         case AGGR_GLOBAL:
1521         default:
1522                 break;
1523         }
1524         return 0;
1525 }
1526
1527 static int setup_events(const char * const *attrs, unsigned len)
1528 {
1529         unsigned i;
1530
1531         for (i = 0; i < len; i++) {
1532                 if (parse_events(evsel_list, attrs[i]))
1533                         return -1;
1534         }
1535         return 0;
1536 }
1537
1538 /*
1539  * Add default attributes, if there were no attributes specified or
1540  * if -d/--detailed, -d -d or -d -d -d is used:
1541  */
1542 static int add_default_attributes(void)
1543 {
1544         struct perf_event_attr default_attrs[] = {
1545
1546   { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_TASK_CLOCK              },
1547   { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_CONTEXT_SWITCHES        },
1548   { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_CPU_MIGRATIONS          },
1549   { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_PAGE_FAULTS             },
1550
1551   { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_CPU_CYCLES              },
1552   { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_STALLED_CYCLES_FRONTEND },
1553   { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_STALLED_CYCLES_BACKEND  },
1554   { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_INSTRUCTIONS            },
1555   { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_BRANCH_INSTRUCTIONS     },
1556   { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_BRANCH_MISSES           },
1557
1558 };
1559
1560 /*
1561  * Detailed stats (-d), covering the L1 and last level data caches:
1562  */
1563         struct perf_event_attr detailed_attrs[] = {
1564
1565   { .type = PERF_TYPE_HW_CACHE,
1566     .config =
1567          PERF_COUNT_HW_CACHE_L1D                <<  0  |
1568         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
1569         (PERF_COUNT_HW_CACHE_RESULT_ACCESS      << 16)                          },
1570
1571   { .type = PERF_TYPE_HW_CACHE,
1572     .config =
1573          PERF_COUNT_HW_CACHE_L1D                <<  0  |
1574         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
1575         (PERF_COUNT_HW_CACHE_RESULT_MISS        << 16)                          },
1576
1577   { .type = PERF_TYPE_HW_CACHE,
1578     .config =
1579          PERF_COUNT_HW_CACHE_LL                 <<  0  |
1580         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
1581         (PERF_COUNT_HW_CACHE_RESULT_ACCESS      << 16)                          },
1582
1583   { .type = PERF_TYPE_HW_CACHE,
1584     .config =
1585          PERF_COUNT_HW_CACHE_LL                 <<  0  |
1586         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
1587         (PERF_COUNT_HW_CACHE_RESULT_MISS        << 16)                          },
1588 };
1589
1590 /*
1591  * Very detailed stats (-d -d), covering the instruction cache and the TLB caches:
1592  */
1593         struct perf_event_attr very_detailed_attrs[] = {
1594
1595   { .type = PERF_TYPE_HW_CACHE,
1596     .config =
1597          PERF_COUNT_HW_CACHE_L1I                <<  0  |
1598         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
1599         (PERF_COUNT_HW_CACHE_RESULT_ACCESS      << 16)                          },
1600
1601   { .type = PERF_TYPE_HW_CACHE,
1602     .config =
1603          PERF_COUNT_HW_CACHE_L1I                <<  0  |
1604         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
1605         (PERF_COUNT_HW_CACHE_RESULT_MISS        << 16)                          },
1606
1607   { .type = PERF_TYPE_HW_CACHE,
1608     .config =
1609          PERF_COUNT_HW_CACHE_DTLB               <<  0  |
1610         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
1611         (PERF_COUNT_HW_CACHE_RESULT_ACCESS      << 16)                          },
1612
1613   { .type = PERF_TYPE_HW_CACHE,
1614     .config =
1615          PERF_COUNT_HW_CACHE_DTLB               <<  0  |
1616         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
1617         (PERF_COUNT_HW_CACHE_RESULT_MISS        << 16)                          },
1618
1619   { .type = PERF_TYPE_HW_CACHE,
1620     .config =
1621          PERF_COUNT_HW_CACHE_ITLB               <<  0  |
1622         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
1623         (PERF_COUNT_HW_CACHE_RESULT_ACCESS      << 16)                          },
1624
1625   { .type = PERF_TYPE_HW_CACHE,
1626     .config =
1627          PERF_COUNT_HW_CACHE_ITLB               <<  0  |
1628         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
1629         (PERF_COUNT_HW_CACHE_RESULT_MISS        << 16)                          },
1630
1631 };
1632
1633 /*
1634  * Very, very detailed stats (-d -d -d), adding prefetch events:
1635  */
1636         struct perf_event_attr very_very_detailed_attrs[] = {
1637
1638   { .type = PERF_TYPE_HW_CACHE,
1639     .config =
1640          PERF_COUNT_HW_CACHE_L1D                <<  0  |
1641         (PERF_COUNT_HW_CACHE_OP_PREFETCH        <<  8) |
1642         (PERF_COUNT_HW_CACHE_RESULT_ACCESS      << 16)                          },
1643
1644   { .type = PERF_TYPE_HW_CACHE,
1645     .config =
1646          PERF_COUNT_HW_CACHE_L1D                <<  0  |
1647         (PERF_COUNT_HW_CACHE_OP_PREFETCH        <<  8) |
1648         (PERF_COUNT_HW_CACHE_RESULT_MISS        << 16)                          },
1649 };
1650
1651         /* Set attrs if no event is selected and !null_run: */
1652         if (null_run)
1653                 return 0;
1654
1655         if (transaction_run) {
1656                 int err;
1657                 if (pmu_have_event("cpu", "cycles-ct") &&
1658                     pmu_have_event("cpu", "el-start"))
1659                         err = setup_events(transaction_attrs,
1660                                         ARRAY_SIZE(transaction_attrs));
1661                 else
1662                         err = setup_events(transaction_limited_attrs,
1663                                  ARRAY_SIZE(transaction_limited_attrs));
1664                 if (err < 0) {
1665                         fprintf(stderr, "Cannot set up transaction events\n");
1666                         return -1;
1667                 }
1668                 return 0;
1669         }
1670
1671         if (!evsel_list->nr_entries) {
1672                 if (perf_evlist__add_default_attrs(evsel_list, default_attrs) < 0)
1673                         return -1;
1674         }
1675
1676         /* Detailed events get appended to the event list: */
1677
1678         if (detailed_run <  1)
1679                 return 0;
1680
1681         /* Append detailed run extra attributes: */
1682         if (perf_evlist__add_default_attrs(evsel_list, detailed_attrs) < 0)
1683                 return -1;
1684
1685         if (detailed_run < 2)
1686                 return 0;
1687
1688         /* Append very detailed run extra attributes: */
1689         if (perf_evlist__add_default_attrs(evsel_list, very_detailed_attrs) < 0)
1690                 return -1;
1691
1692         if (detailed_run < 3)
1693                 return 0;
1694
1695         /* Append very, very detailed run extra attributes: */
1696         return perf_evlist__add_default_attrs(evsel_list, very_very_detailed_attrs);
1697 }
1698
1699 int cmd_stat(int argc, const char **argv, const char *prefix __maybe_unused)
1700 {
1701         bool append_file = false;
1702         int output_fd = 0;
1703         const char *output_name = NULL;
1704         const struct option options[] = {
1705         OPT_BOOLEAN('T', "transaction", &transaction_run,
1706                     "hardware transaction statistics"),
1707         OPT_CALLBACK('e', "event", &evsel_list, "event",
1708                      "event selector. use 'perf list' to list available events",
1709                      parse_events_option),
1710         OPT_CALLBACK(0, "filter", &evsel_list, "filter",
1711                      "event filter", parse_filter),
1712         OPT_BOOLEAN('i', "no-inherit", &no_inherit,
1713                     "child tasks do not inherit counters"),
1714         OPT_STRING('p', "pid", &target.pid, "pid",
1715                    "stat events on existing process id"),
1716         OPT_STRING('t', "tid", &target.tid, "tid",
1717                    "stat events on existing thread id"),
1718         OPT_BOOLEAN('a', "all-cpus", &target.system_wide,
1719                     "system-wide collection from all CPUs"),
1720         OPT_BOOLEAN('g', "group", &group,
1721                     "put the counters into a counter group"),
1722         OPT_BOOLEAN('c', "scale", &scale, "scale/normalize counters"),
1723         OPT_INCR('v', "verbose", &verbose,
1724                     "be more verbose (show counter open errors, etc)"),
1725         OPT_INTEGER('r', "repeat", &run_count,
1726                     "repeat command and print average + stddev (max: 100, forever: 0)"),
1727         OPT_BOOLEAN('n', "null", &null_run,
1728                     "null run - dont start any counters"),
1729         OPT_INCR('d', "detailed", &detailed_run,
1730                     "detailed run - start a lot of events"),
1731         OPT_BOOLEAN('S', "sync", &sync_run,
1732                     "call sync() before starting a run"),
1733         OPT_CALLBACK_NOOPT('B', "big-num", NULL, NULL,
1734                            "print large numbers with thousands\' separators",
1735                            stat__set_big_num),
1736         OPT_STRING('C', "cpu", &target.cpu_list, "cpu",
1737                     "list of cpus to monitor in system-wide"),
1738         OPT_SET_UINT('A', "no-aggr", &aggr_mode,
1739                     "disable CPU count aggregation", AGGR_NONE),
1740         OPT_STRING('x', "field-separator", &csv_sep, "separator",
1741                    "print counts with custom separator"),
1742         OPT_CALLBACK('G', "cgroup", &evsel_list, "name",
1743                      "monitor event in cgroup name only", parse_cgroups),
1744         OPT_STRING('o', "output", &output_name, "file", "output file name"),
1745         OPT_BOOLEAN(0, "append", &append_file, "append to the output file"),
1746         OPT_INTEGER(0, "log-fd", &output_fd,
1747                     "log output to fd, instead of stderr"),
1748         OPT_STRING(0, "pre", &pre_cmd, "command",
1749                         "command to run prior to the measured command"),
1750         OPT_STRING(0, "post", &post_cmd, "command",
1751                         "command to run after to the measured command"),
1752         OPT_UINTEGER('I', "interval-print", &interval,
1753                     "print counts at regular interval in ms (>= 100)"),
1754         OPT_SET_UINT(0, "per-socket", &aggr_mode,
1755                      "aggregate counts per processor socket", AGGR_SOCKET),
1756         OPT_SET_UINT(0, "per-core", &aggr_mode,
1757                      "aggregate counts per physical processor core", AGGR_CORE),
1758         OPT_UINTEGER('D', "delay", &initial_delay,
1759                      "ms to wait before starting measurement after program start"),
1760         OPT_END()
1761         };
1762         const char * const stat_usage[] = {
1763                 "perf stat [<options>] [<command>]",
1764                 NULL
1765         };
1766         int status = -EINVAL, run_idx;
1767         const char *mode;
1768
1769         setlocale(LC_ALL, "");
1770
1771         evsel_list = perf_evlist__new();
1772         if (evsel_list == NULL)
1773                 return -ENOMEM;
1774
1775         argc = parse_options(argc, argv, options, stat_usage,
1776                 PARSE_OPT_STOP_AT_NON_OPTION);
1777
1778         output = stderr;
1779         if (output_name && strcmp(output_name, "-"))
1780                 output = NULL;
1781
1782         if (output_name && output_fd) {
1783                 fprintf(stderr, "cannot use both --output and --log-fd\n");
1784                 parse_options_usage(stat_usage, options, "o", 1);
1785                 parse_options_usage(NULL, options, "log-fd", 0);
1786                 goto out;
1787         }
1788
1789         if (output_fd < 0) {
1790                 fprintf(stderr, "argument to --log-fd must be a > 0\n");
1791                 parse_options_usage(stat_usage, options, "log-fd", 0);
1792                 goto out;
1793         }
1794
1795         if (!output) {
1796                 struct timespec tm;
1797                 mode = append_file ? "a" : "w";
1798
1799                 output = fopen(output_name, mode);
1800                 if (!output) {
1801                         perror("failed to create output file");
1802                         return -1;
1803                 }
1804                 clock_gettime(CLOCK_REALTIME, &tm);
1805                 fprintf(output, "# started on %s\n", ctime(&tm.tv_sec));
1806         } else if (output_fd > 0) {
1807                 mode = append_file ? "a" : "w";
1808                 output = fdopen(output_fd, mode);
1809                 if (!output) {
1810                         perror("Failed opening logfd");
1811                         return -errno;
1812                 }
1813         }
1814
1815         if (csv_sep) {
1816                 csv_output = true;
1817                 if (!strcmp(csv_sep, "\\t"))
1818                         csv_sep = "\t";
1819         } else
1820                 csv_sep = DEFAULT_SEPARATOR;
1821
1822         /*
1823          * let the spreadsheet do the pretty-printing
1824          */
1825         if (csv_output) {
1826                 /* User explicitly passed -B? */
1827                 if (big_num_opt == 1) {
1828                         fprintf(stderr, "-B option not supported with -x\n");
1829                         parse_options_usage(stat_usage, options, "B", 1);
1830                         parse_options_usage(NULL, options, "x", 1);
1831                         goto out;
1832                 } else /* Nope, so disable big number formatting */
1833                         big_num = false;
1834         } else if (big_num_opt == 0) /* User passed --no-big-num */
1835                 big_num = false;
1836
1837         if (!argc && target__none(&target))
1838                 usage_with_options(stat_usage, options);
1839
1840         if (run_count < 0) {
1841                 pr_err("Run count must be a positive number\n");
1842                 parse_options_usage(stat_usage, options, "r", 1);
1843                 goto out;
1844         } else if (run_count == 0) {
1845                 forever = true;
1846                 run_count = 1;
1847         }
1848
1849         /* no_aggr, cgroup are for system-wide only */
1850         if ((aggr_mode != AGGR_GLOBAL || nr_cgroups) &&
1851             !target__has_cpu(&target)) {
1852                 fprintf(stderr, "both cgroup and no-aggregation "
1853                         "modes only available in system-wide mode\n");
1854
1855                 parse_options_usage(stat_usage, options, "G", 1);
1856                 parse_options_usage(NULL, options, "A", 1);
1857                 parse_options_usage(NULL, options, "a", 1);
1858                 goto out;
1859         }
1860
1861         if (add_default_attributes())
1862                 goto out;
1863
1864         target__validate(&target);
1865
1866         if (perf_evlist__create_maps(evsel_list, &target) < 0) {
1867                 if (target__has_task(&target)) {
1868                         pr_err("Problems finding threads of monitor\n");
1869                         parse_options_usage(stat_usage, options, "p", 1);
1870                         parse_options_usage(NULL, options, "t", 1);
1871                 } else if (target__has_cpu(&target)) {
1872                         perror("failed to parse CPUs map");
1873                         parse_options_usage(stat_usage, options, "C", 1);
1874                         parse_options_usage(NULL, options, "a", 1);
1875                 }
1876                 goto out;
1877         }
1878         if (interval && interval < 100) {
1879                 pr_err("print interval must be >= 100ms\n");
1880                 parse_options_usage(stat_usage, options, "I", 1);
1881                 goto out;
1882         }
1883
1884         if (perf_evlist__alloc_stats(evsel_list, interval))
1885                 goto out;
1886
1887         if (perf_stat_init_aggr_mode())
1888                 goto out;
1889
1890         /*
1891          * We dont want to block the signals - that would cause
1892          * child tasks to inherit that and Ctrl-C would not work.
1893          * What we want is for Ctrl-C to work in the exec()-ed
1894          * task, but being ignored by perf stat itself:
1895          */
1896         atexit(sig_atexit);
1897         if (!forever)
1898                 signal(SIGINT,  skip_signal);
1899         signal(SIGCHLD, skip_signal);
1900         signal(SIGALRM, skip_signal);
1901         signal(SIGABRT, skip_signal);
1902
1903         status = 0;
1904         for (run_idx = 0; forever || run_idx < run_count; run_idx++) {
1905                 if (run_count != 1 && verbose)
1906                         fprintf(output, "[ perf stat: executing run #%d ... ]\n",
1907                                 run_idx + 1);
1908
1909                 status = run_perf_stat(argc, argv);
1910                 if (forever && status != -1) {
1911                         print_stat(argc, argv);
1912                         perf_stat__reset_stats(evsel_list);
1913                 }
1914         }
1915
1916         if (!forever && status != -1 && !interval)
1917                 print_stat(argc, argv);
1918
1919         perf_evlist__free_stats(evsel_list);
1920 out:
1921         perf_evlist__delete(evsel_list);
1922         return status;
1923 }