kernel/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                                 int cpu)
 358 {
 359         if (perf_evsel__match(counter, SOFTWARE, SW_TASK_CLOCK))
 360                 update_stats(&runtime_nsecs_stats[cpu], count[0]);
 361         else if (perf_evsel__match(counter, HARDWARE, HW_CPU_CYCLES))
 362                 update_stats(&runtime_cycles_stats[cpu], count[0]);
 363         else if (transaction_run &&
 364                  perf_evsel__cmp(counter, nth_evsel(T_CYCLES_IN_TX)))
 365                 update_stats(&runtime_cycles_in_tx_stats[cpu], count[0]);
 366         else if (transaction_run &&
 367                  perf_evsel__cmp(counter, nth_evsel(T_TRANSACTION_START)))
 368                 update_stats(&runtime_transaction_stats[cpu], count[0]);
 369         else if (transaction_run &&
 370                  perf_evsel__cmp(counter, nth_evsel(T_ELISION_START)))
 371                 update_stats(&runtime_elision_stats[cpu], count[0]);
 372         else if (perf_evsel__match(counter, HARDWARE, HW_STALLED_CYCLES_FRONTEND))
 373                 update_stats(&runtime_stalled_cycles_front_stats[cpu], count[0]);
 374         else if (perf_evsel__match(counter, HARDWARE, HW_STALLED_CYCLES_BACKEND))
 375                 update_stats(&runtime_stalled_cycles_back_stats[cpu], count[0]);
 376         else if (perf_evsel__match(counter, HARDWARE, HW_BRANCH_INSTRUCTIONS))
 377                 update_stats(&runtime_branches_stats[cpu], count[0]);
 378         else if (perf_evsel__match(counter, HARDWARE, HW_CACHE_REFERENCES))
 379                 update_stats(&runtime_cacherefs_stats[cpu], count[0]);
 380         else if (perf_evsel__match(counter, HW_CACHE, HW_CACHE_L1D))
 381                 update_stats(&runtime_l1_dcache_stats[cpu], count[0]);
 382         else if (perf_evsel__match(counter, HW_CACHE, HW_CACHE_L1I))
 383                 update_stats(&runtime_l1_icache_stats[cpu], count[0]);
 384         else if (perf_evsel__match(counter, HW_CACHE, HW_CACHE_LL))
 385                 update_stats(&runtime_ll_cache_stats[cpu], count[0]);
 386         else if (perf_evsel__match(counter, HW_CACHE, HW_CACHE_DTLB))
 387                 update_stats(&runtime_dtlb_cache_stats[cpu], count[0]);
 388         else if (perf_evsel__match(counter, HW_CACHE, HW_CACHE_ITLB))
 389                 update_stats(&runtime_itlb_cache_stats[cpu], count[0]);
 390 }
 391
 392 static void zero_per_pkg(struct perf_evsel *counter)
 393 {
 394         if (counter->per_pkg_mask)
 395                 memset(counter->per_pkg_mask, 0, MAX_NR_CPUS);
 396 }
 397
 398 static int check_per_pkg(struct perf_evsel *counter, int cpu, bool *skip)
 399 {
 400         unsigned long *mask = counter->per_pkg_mask;
 401         struct cpu_map *cpus = perf_evsel__cpus(counter);
 402         int s;
 403
 404         *skip = false;
 405
 406         if (!counter->per_pkg)
 407                 return 0;
 408
 409         if (cpu_map__empty(cpus))
 410                 return 0;
 411
 412         if (!mask) {
 413                 mask = zalloc(MAX_NR_CPUS);
 414                 if (!mask)
 415                         return -ENOMEM;
 416
 417                 counter->per_pkg_mask = mask;
 418         }
 419
 420         s = cpu_map__get_socket(cpus, cpu);
 421         if (s < 0)
 422                 return -1;
 423
 424         *skip = test_and_set_bit(s, mask) == 1;
 425         return 0;
 426 }
 427
 428 static int read_cb(struct perf_evsel *evsel, int cpu, int thread __maybe_unused,
 429                    struct perf_counts_values *count)
 430 {
 431         struct perf_counts_values *aggr = &evsel->counts->aggr;
 432         static struct perf_counts_values zero;
 433         bool skip = false;
 434
 435         if (check_per_pkg(evsel, cpu, &skip)) {
 436                 pr_err("failed to read per-pkg counter\n");
 437                 return -1;
 438         }
 439
 440         if (skip)
 441                 count = &zero;
 442
 443         switch (aggr_mode) {
 444         case AGGR_CORE:
 445         case AGGR_SOCKET:
 446         case AGGR_NONE:
 447                 if (!evsel->snapshot)
 448                         perf_evsel__compute_deltas(evsel, cpu, count);
 449                 perf_counts_values__scale(count, scale, NULL);
 450                 evsel->counts->cpu[cpu] = *count;
 451                 if (aggr_mode == AGGR_NONE)
 452                         update_shadow_stats(evsel, count->values, cpu);
 453                 break;
 454         case AGGR_GLOBAL:
 455                 aggr->val += count->val;
 456                 if (scale) {
 457                         aggr->ena += count->ena;
 458                         aggr->run += count->run;
 459                 }
 460         default:
 461                 break;
 462         }
 463
 464         return 0;
 465 }
 466
 467 static int read_counter(struct perf_evsel *counter);
 468
 469 /*
 470  * Read out the results of a single counter:
 471  * aggregate counts across CPUs in system-wide mode
 472  */
 473 static int read_counter_aggr(struct perf_evsel *counter)
 474 {
 475         struct perf_counts_values *aggr = &counter->counts->aggr;
 476         struct perf_stat *ps = counter->priv;
 477         u64 *count = counter->counts->aggr.values;
 478         int i;
 479
 480         aggr->val = aggr->ena = aggr->run = 0;
 481
 482         if (read_counter(counter))
 483                 return -1;
 484
 485         if (!counter->snapshot)
 486                 perf_evsel__compute_deltas(counter, -1, aggr);
 487         perf_counts_values__scale(aggr, scale, &counter->counts->scaled);
 488
 489         for (i = 0; i < 3; i++)
 490                 update_stats(&ps->res_stats[i], count[i]);
 491
 492         if (verbose) {
 493                 fprintf(output, "%s: %" PRIu64 " %" PRIu64 " %" PRIu64 "\n",
 494                         perf_evsel__name(counter), count[0], count[1], count[2]);
 495         }
 496
 497         /*
 498          * Save the full runtime - to allow normalization during printout:
 499          */
 500         update_shadow_stats(counter, count, 0);
 501
 502         return 0;
 503 }
 504
 505 /*
 506  * Read out the results of a single counter:
 507  * do not aggregate counts across CPUs in system-wide mode
 508  */
 509 static int read_counter(struct perf_evsel *counter)
 510 {
 511         int nthreads = thread_map__nr(evsel_list->threads);
 512         int ncpus = perf_evsel__nr_cpus(counter);
 513         int cpu, thread;
 514
 515         if (!counter->supported)
 516                 return -ENOENT;
 517
 518         if (counter->system_wide)
 519                 nthreads = 1;
 520
 521         if (counter->per_pkg)
 522                 zero_per_pkg(counter);
 523
 524         for (thread = 0; thread < nthreads; thread++) {
 525                 for (cpu = 0; cpu < ncpus; cpu++) {
 526                         if (perf_evsel__read_cb(counter, cpu, thread, read_cb))
 527                                 return -1;
 528                 }
 529         }
 530
 531         return 0;
 532 }
 533
 534 static void print_interval(void)
 535 {
 536         static int num_print_interval;
 537         struct perf_evsel *counter;
 538         struct perf_stat *ps;
 539         struct timespec ts, rs;
 540         char prefix[64];
 541
 542         if (aggr_mode == AGGR_GLOBAL) {
 543                 evlist__for_each(evsel_list, counter) {
 544                         ps = counter->priv;
 545                         memset(ps->res_stats, 0, sizeof(ps->res_stats));
 546                         read_counter_aggr(counter);
 547                 }
 548         } else  {
 549                 evlist__for_each(evsel_list, counter) {
 550                         ps = counter->priv;
 551                         memset(ps->res_stats, 0, sizeof(ps->res_stats));
 552                         read_counter(counter);
 553                 }
 554         }
 555
 556         clock_gettime(CLOCK_MONOTONIC, &ts);
 557         diff_timespec(&rs, &ts, &ref_time);
 558         sprintf(prefix, "%6lu.%09lu%s", rs.tv_sec, rs.tv_nsec, csv_sep);
 559
 560         if (num_print_interval == 0 && !csv_output) {
 561                 switch (aggr_mode) {
 562                 case AGGR_SOCKET:
 563                         fprintf(output, "#           time socket cpus             counts %*s events\n", unit_width, "unit");
 564                         break;
 565                 case AGGR_CORE:
 566                         fprintf(output, "#           time core         cpus             counts %*s events\n", unit_width, "unit");
 567                         break;
 568                 case AGGR_NONE:
 569                         fprintf(output, "#           time CPU                counts %*s events\n", unit_width, "unit");
 570                         break;
 571                 case AGGR_GLOBAL:
 572                 default:
 573                         fprintf(output, "#           time             counts %*s events\n", unit_width, "unit");
 574                 }
 575         }
 576
 577         if (++num_print_interval == 25)
 578                 num_print_interval = 0;
 579
 580         switch (aggr_mode) {
 581         case AGGR_CORE:
 582         case AGGR_SOCKET:
 583                 print_aggr(prefix);
 584                 break;
 585         case AGGR_NONE:
 586                 evlist__for_each(evsel_list, counter)
 587                         print_counter(counter, prefix);
 588                 break;
 589         case AGGR_GLOBAL:
 590         default:
 591                 evlist__for_each(evsel_list, counter)
 592                         print_counter_aggr(counter, prefix);
 593         }
 594
 595         fflush(output);
 596 }
 597
 598 static void handle_initial_delay(void)
 599 {
 600         struct perf_evsel *counter;
 601
 602         if (initial_delay) {
 603                 const int ncpus = cpu_map__nr(evsel_list->cpus),
 604                         nthreads = thread_map__nr(evsel_list->threads);
 605
 606                 usleep(initial_delay * 1000);
 607                 evlist__for_each(evsel_list, counter)
 608                         perf_evsel__enable(counter, ncpus, nthreads);
 609         }
 610 }
 611
 612 static volatile int workload_exec_errno;
 613
 614 /*
 615  * perf_evlist__prepare_workload will send a SIGUSR1
 616  * if the fork fails, since we asked by setting its
 617  * want_signal to true.
 618  */
 619 static void workload_exec_failed_signal(int signo __maybe_unused, siginfo_t *info,
 620                                         void *ucontext __maybe_unused)
 621 {
 622         workload_exec_errno = info->si_value.sival_int;
 623 }
 624
 625 static int __run_perf_stat(int argc, const char **argv)
 626 {
 627         char msg[512];
 628         unsigned long long t0, t1;
 629         struct perf_evsel *counter;
 630         struct timespec ts;
 631         size_t l;
 632         int status = 0;
 633         const bool forks = (argc > 0);
 634
 635         if (interval) {
 636                 ts.tv_sec  = interval / 1000;
 637                 ts.tv_nsec = (interval % 1000) * 1000000;
 638         } else {
 639                 ts.tv_sec  = 1;
 640                 ts.tv_nsec = 0;
 641         }
 642
 643         if (forks) {
 644                 if (perf_evlist__prepare_workload(evsel_list, &target, argv, false,
 645                                                   workload_exec_failed_signal) < 0) {
 646                         perror("failed to prepare workload");
 647                         return -1;
 648                 }
 649                 child_pid = evsel_list->workload.pid;
 650         }
 651
 652         if (group)
 653                 perf_evlist__set_leader(evsel_list);
 654
 655         evlist__for_each(evsel_list, counter) {
 656                 if (create_perf_stat_counter(counter) < 0) {
 657                         /*
 658                          * PPC returns ENXIO for HW counters until 2.6.37
 659                          * (behavior changed with commit b0a873e).
 660                          */
 661                         if (errno == EINVAL || errno == ENOSYS ||
 662                             errno == ENOENT || errno == EOPNOTSUPP ||
 663                             errno == ENXIO) {
 664                                 if (verbose)
 665                                         ui__warning("%s event is not supported by the kernel.\n",
 666                                                     perf_evsel__name(counter));
 667                                 counter->supported = false;
 668                                 continue;
 669                         }
 670
 671                         perf_evsel__open_strerror(counter, &target,
 672                                                   errno, msg, sizeof(msg));
 673                         ui__error("%s\n", msg);
 674
 675                         if (child_pid != -1)
 676                                 kill(child_pid, SIGTERM);
 677
 678                         return -1;
 679                 }
 680                 counter->supported = true;
 681
 682                 l = strlen(counter->unit);
 683                 if (l > unit_width)
 684                         unit_width = l;
 685         }
 686
 687         if (perf_evlist__apply_filters(evsel_list, &counter)) {
 688                 error("failed to set filter \"%s\" on event %s with %d (%s)\n",
 689                         counter->filter, perf_evsel__name(counter), errno,
 690                         strerror_r(errno, msg, sizeof(msg)));
 691                 return -1;
 692         }
 693
 694         /*
 695          * Enable counters and exec the command:
 696          */
 697         t0 = rdclock();
 698         clock_gettime(CLOCK_MONOTONIC, &ref_time);
 699
 700         if (forks) {
 701                 perf_evlist__start_workload(evsel_list);
 702                 handle_initial_delay();
 703
 704                 if (interval) {
 705                         while (!waitpid(child_pid, &status, WNOHANG)) {
 706                                 nanosleep(&ts, NULL);
 707                                 print_interval();
 708                         }
 709                 }
 710                 wait(&status);
 711
 712                 if (workload_exec_errno) {
 713                         const char *emsg = strerror_r(workload_exec_errno, msg, sizeof(msg));
 714                         pr_err("Workload failed: %s\n", emsg);
 715                         return -1;
 716                 }
 717
 718                 if (WIFSIGNALED(status))
 719                         psignal(WTERMSIG(status), argv[0]);
 720         } else {
 721                 handle_initial_delay();
 722                 while (!done) {
 723                         nanosleep(&ts, NULL);
 724                         if (interval)
 725                                 print_interval();
 726                 }
 727         }
 728
 729         t1 = rdclock();
 730
 731         update_stats(&walltime_nsecs_stats, t1 - t0);
 732
 733         if (aggr_mode == AGGR_GLOBAL) {
 734                 evlist__for_each(evsel_list, counter) {
 735                         read_counter_aggr(counter);
 736                         perf_evsel__close_fd(counter, perf_evsel__nr_cpus(counter),
 737                                              thread_map__nr(evsel_list->threads));
 738                 }
 739         } else {
 740                 evlist__for_each(evsel_list, counter) {
 741                         read_counter(counter);
 742                         perf_evsel__close_fd(counter, perf_evsel__nr_cpus(counter), 1);
 743                 }
 744         }
 745
 746         return WEXITSTATUS(status);
 747 }
 748
 749 static int run_perf_stat(int argc, const char **argv)
 750 {
 751         int ret;
 752
 753         if (pre_cmd) {
 754                 ret = system(pre_cmd);
 755                 if (ret)
 756                         return ret;
 757         }
 758
 759         if (sync_run)
 760                 sync();
 761
 762         ret = __run_perf_stat(argc, argv);
 763         if (ret)
 764                 return ret;
 765
 766         if (post_cmd) {
 767                 ret = system(post_cmd);
 768                 if (ret)
 769                         return ret;
 770         }
 771
 772         return ret;
 773 }
 774
 775 static void print_running(u64 run, u64 ena)
 776 {
 777         if (csv_output) {
 778                 fprintf(output, "%s%" PRIu64 "%s%.2f",
 779                                         csv_sep,
 780                                         run,
 781                                         csv_sep,
 782                                         ena ? 100.0 * run / ena : 100.0);
 783         } else if (run != ena) {
 784                 fprintf(output, "  (%.2f%%)", 100.0 * run / ena);
 785         }
 786 }
 787
 788 static void print_noise_pct(double total, double avg)
 789 {
 790         double pct = rel_stddev_stats(total, avg);
 791
 792         if (csv_output)
 793                 fprintf(output, "%s%.2f%%", csv_sep, pct);
 794         else if (pct)
 795                 fprintf(output, "  ( +-%6.2f%% )", pct);
 796 }
 797
 798 static void print_noise(struct perf_evsel *evsel, double avg)
 799 {
 800         struct perf_stat *ps;
 801
 802         if (run_count == 1)
 803                 return;
 804
 805         ps = evsel->priv;
 806         print_noise_pct(stddev_stats(&ps->res_stats[0]), avg);
 807 }
 808
 809 static void aggr_printout(struct perf_evsel *evsel, int id, int nr)
 810 {
 811         switch (aggr_mode) {
 812         case AGGR_CORE:
 813                 fprintf(output, "S%d-C%*d%s%*d%s",
 814                         cpu_map__id_to_socket(id),
 815                         csv_output ? 0 : -8,
 816                         cpu_map__id_to_cpu(id),
 817                         csv_sep,
 818                         csv_output ? 0 : 4,
 819                         nr,
 820                         csv_sep);
 821                 break;
 822         case AGGR_SOCKET:
 823                 fprintf(output, "S%*d%s%*d%s",
 824                         csv_output ? 0 : -5,
 825                         id,
 826                         csv_sep,
 827                         csv_output ? 0 : 4,
 828                         nr,
 829                         csv_sep);
 830                         break;
 831         case AGGR_NONE:
 832                 fprintf(output, "CPU%*d%s",
 833                         csv_output ? 0 : -4,
 834                         perf_evsel__cpus(evsel)->map[id], csv_sep);
 835                 break;
 836         case AGGR_GLOBAL:
 837         default:
 838                 break;
 839         }
 840 }
 841
 842 static void nsec_printout(int id, int nr, struct perf_evsel *evsel, double avg)
 843 {
 844         double msecs = avg / 1e6;
 845         const char *fmt_v, *fmt_n;
 846         char name[25];
 847
 848         fmt_v = csv_output ? "%.6f%s" : "%18.6f%s";
 849         fmt_n = csv_output ? "%s" : "%-25s";
 850
 851         aggr_printout(evsel, id, nr);
 852
 853         scnprintf(name, sizeof(name), "%s%s",
 854                   perf_evsel__name(evsel), csv_output ? "" : " (msec)");
 855
 856         fprintf(output, fmt_v, msecs, csv_sep);
 857
 858         if (csv_output)
 859                 fprintf(output, "%s%s", evsel->unit, csv_sep);
 860         else
 861                 fprintf(output, "%-*s%s", unit_width, evsel->unit, csv_sep);
 862
 863         fprintf(output, fmt_n, name);
 864
 865         if (evsel->cgrp)
 866                 fprintf(output, "%s%s", csv_sep, evsel->cgrp->name);
 867
 868         if (csv_output || interval)
 869                 return;
 870
 871         if (perf_evsel__match(evsel, SOFTWARE, SW_TASK_CLOCK))
 872                 fprintf(output, " # %8.3f CPUs utilized          ",
 873                         avg / avg_stats(&walltime_nsecs_stats));
 874         else
 875                 fprintf(output, "                                   ");
 876 }
 877
 878 /* used for get_ratio_color() */
 879 enum grc_type {
 880         GRC_STALLED_CYCLES_FE,
 881         GRC_STALLED_CYCLES_BE,
 882         GRC_CACHE_MISSES,
 883         GRC_MAX_NR
 884 };
 885
 886 static const char *get_ratio_color(enum grc_type type, double ratio)
 887 {
 888         static const double grc_table[GRC_MAX_NR][3] = {
 889                 [GRC_STALLED_CYCLES_FE] = { 50.0, 30.0, 10.0 },
 890                 [GRC_STALLED_CYCLES_BE] = { 75.0, 50.0, 20.0 },
 891                 [GRC_CACHE_MISSES]      = { 20.0, 10.0, 5.0 },
 892         };
 893         const char *color = PERF_COLOR_NORMAL;
 894
 895         if (ratio > grc_table[type][0])
 896                 color = PERF_COLOR_RED;
 897         else if (ratio > grc_table[type][1])
 898                 color = PERF_COLOR_MAGENTA;
 899         else if (ratio > grc_table[type][2])
 900                 color = PERF_COLOR_YELLOW;
 901
 902         return color;
 903 }
 904
 905 static void print_stalled_cycles_frontend(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_FE, ratio);
 918
 919         fprintf(output, " #  ");
 920         color_fprintf(output, color, "%6.2f%%", ratio);
 921         fprintf(output, " frontend cycles idle   ");
 922 }
 923
 924 static void print_stalled_cycles_backend(int cpu,
 925                                          struct perf_evsel *evsel
 926                                          __maybe_unused, double avg)
 927 {
 928         double total, ratio = 0.0;
 929         const char *color;
 930
 931         total = avg_stats(&runtime_cycles_stats[cpu]);
 932
 933         if (total)
 934                 ratio = avg / total * 100.0;
 935
 936         color = get_ratio_color(GRC_STALLED_CYCLES_BE, ratio);
 937
 938         fprintf(output, " #  ");
 939         color_fprintf(output, color, "%6.2f%%", ratio);
 940         fprintf(output, " backend  cycles idle   ");
 941 }
 942
 943 static void print_branch_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_branches_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 branches        ");
 960 }
 961
 962 static void print_l1_dcache_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_dcache_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-dcache hits  ");
 979 }
 980
 981 static void print_l1_icache_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_l1_icache_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 L1-icache hits  ");
 998 }
 999
1000 static void print_dtlb_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_dtlb_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 dTLB cache hits ");
1017 }
1018
1019 static void print_itlb_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_itlb_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 iTLB cache hits ");
1036 }
1037
1038 static void print_ll_cache_misses(int cpu,
1039                                   struct perf_evsel *evsel __maybe_unused,
1040                                   double avg)
1041 {
1042         double total, ratio = 0.0;
1043         const char *color;
1044
1045         total = avg_stats(&runtime_ll_cache_stats[cpu]);
1046
1047         if (total)
1048                 ratio = avg / total * 100.0;
1049
1050         color = get_ratio_color(GRC_CACHE_MISSES, ratio);
1051
1052         fprintf(output, " #  ");
1053         color_fprintf(output, color, "%6.2f%%", ratio);
1054         fprintf(output, " of all LL-cache hits   ");
1055 }
1056
1057 static void abs_printout(int id, int nr, struct perf_evsel *evsel, double avg)
1058 {
1059         double total, ratio = 0.0, total2;
1060         double sc =  evsel->scale;
1061         const char *fmt;
1062         int cpu = cpu_map__id_to_cpu(id);
1063
1064         if (csv_output) {
1065                 fmt = sc != 1.0 ?  "%.2f%s" : "%.0f%s";
1066         } else {
1067                 if (big_num)
1068                         fmt = sc != 1.0 ? "%'18.2f%s" : "%'18.0f%s";
1069                 else
1070                         fmt = sc != 1.0 ? "%18.2f%s" : "%18.0f%s";
1071         }
1072
1073         aggr_printout(evsel, id, nr);
1074
1075         if (aggr_mode == AGGR_GLOBAL)
1076                 cpu = 0;
1077
1078         fprintf(output, fmt, avg, csv_sep);
1079
1080         if (evsel->unit)
1081                 fprintf(output, "%-*s%s",
1082                         csv_output ? 0 : unit_width,
1083                         evsel->unit, csv_sep);
1084
1085         fprintf(output, "%-*s", csv_output ? 0 : 25, perf_evsel__name(evsel));
1086
1087         if (evsel->cgrp)
1088                 fprintf(output, "%s%s", csv_sep, evsel->cgrp->name);
1089
1090         if (csv_output || interval)
1091                 return;
1092
1093         if (perf_evsel__match(evsel, HARDWARE, HW_INSTRUCTIONS)) {
1094                 total = avg_stats(&runtime_cycles_stats[cpu]);
1095                 if (total) {
1096                         ratio = avg / total;
1097                         fprintf(output, " #   %5.2f  insns per cycle        ", ratio);
1098                 } else {
1099                         fprintf(output, "                                   ");
1100                 }
1101                 total = avg_stats(&runtime_stalled_cycles_front_stats[cpu]);
1102                 total = max(total, avg_stats(&runtime_stalled_cycles_back_stats[cpu]));
1103
1104                 if (total && avg) {
1105                         ratio = total / avg;
1106                         fprintf(output, "\n");
1107                         if (aggr_mode == AGGR_NONE)
1108                                 fprintf(output, "        ");
1109                         fprintf(output, "                                                  #   %5.2f  stalled cycles per insn", ratio);
1110                 }
1111
1112         } else if (perf_evsel__match(evsel, HARDWARE, HW_BRANCH_MISSES) &&
1113                         runtime_branches_stats[cpu].n != 0) {
1114                 print_branch_misses(cpu, evsel, avg);
1115         } else if (
1116                 evsel->attr.type == PERF_TYPE_HW_CACHE &&
1117                 evsel->attr.config ==  ( PERF_COUNT_HW_CACHE_L1D |
1118                                         ((PERF_COUNT_HW_CACHE_OP_READ) << 8) |
1119                                         ((PERF_COUNT_HW_CACHE_RESULT_MISS) << 16)) &&
1120                         runtime_l1_dcache_stats[cpu].n != 0) {
1121                 print_l1_dcache_misses(cpu, evsel, avg);
1122         } else if (
1123                 evsel->attr.type == PERF_TYPE_HW_CACHE &&
1124                 evsel->attr.config ==  ( PERF_COUNT_HW_CACHE_L1I |
1125                                         ((PERF_COUNT_HW_CACHE_OP_READ) << 8) |
1126                                         ((PERF_COUNT_HW_CACHE_RESULT_MISS) << 16)) &&
1127                         runtime_l1_icache_stats[cpu].n != 0) {
1128                 print_l1_icache_misses(cpu, evsel, avg);
1129         } else if (
1130                 evsel->attr.type == PERF_TYPE_HW_CACHE &&
1131                 evsel->attr.config ==  ( PERF_COUNT_HW_CACHE_DTLB |
1132                                         ((PERF_COUNT_HW_CACHE_OP_READ) << 8) |
1133                                         ((PERF_COUNT_HW_CACHE_RESULT_MISS) << 16)) &&
1134                         runtime_dtlb_cache_stats[cpu].n != 0) {
1135                 print_dtlb_cache_misses(cpu, evsel, avg);
1136         } else if (
1137                 evsel->attr.type == PERF_TYPE_HW_CACHE &&
1138                 evsel->attr.config ==  ( PERF_COUNT_HW_CACHE_ITLB |
1139                                         ((PERF_COUNT_HW_CACHE_OP_READ) << 8) |
1140                                         ((PERF_COUNT_HW_CACHE_RESULT_MISS) << 16)) &&
1141                         runtime_itlb_cache_stats[cpu].n != 0) {
1142                 print_itlb_cache_misses(cpu, evsel, avg);
1143         } else if (
1144                 evsel->attr.type == PERF_TYPE_HW_CACHE &&
1145                 evsel->attr.config ==  ( PERF_COUNT_HW_CACHE_LL |
1146                                         ((PERF_COUNT_HW_CACHE_OP_READ) << 8) |
1147                                         ((PERF_COUNT_HW_CACHE_RESULT_MISS) << 16)) &&
1148                         runtime_ll_cache_stats[cpu].n != 0) {
1149                 print_ll_cache_misses(cpu, evsel, avg);
1150         } else if (perf_evsel__match(evsel, HARDWARE, HW_CACHE_MISSES) &&
1151                         runtime_cacherefs_stats[cpu].n != 0) {
1152                 total = avg_stats(&runtime_cacherefs_stats[cpu]);
1153
1154                 if (total)
1155                         ratio = avg * 100 / total;
1156
1157                 fprintf(output, " # %8.3f %% of all cache refs    ", ratio);
1158
1159         } else if (perf_evsel__match(evsel, HARDWARE, HW_STALLED_CYCLES_FRONTEND)) {
1160                 print_stalled_cycles_frontend(cpu, evsel, avg);
1161         } else if (perf_evsel__match(evsel, HARDWARE, HW_STALLED_CYCLES_BACKEND)) {
1162                 print_stalled_cycles_backend(cpu, evsel, avg);
1163         } else if (perf_evsel__match(evsel, HARDWARE, HW_CPU_CYCLES)) {
1164                 total = avg_stats(&runtime_nsecs_stats[cpu]);
1165
1166                 if (total) {
1167                         ratio = avg / total;
1168                         fprintf(output, " # %8.3f GHz                    ", ratio);
1169                 } else {
1170                         fprintf(output, "                                   ");
1171                 }
1172         } else if (transaction_run &&
1173                    perf_evsel__cmp(evsel, nth_evsel(T_CYCLES_IN_TX))) {
1174                 total = avg_stats(&runtime_cycles_stats[cpu]);
1175                 if (total)
1176                         fprintf(output,
1177                                 " #   %5.2f%% transactional cycles   ",
1178                                 100.0 * (avg / total));
1179         } else if (transaction_run &&
1180                    perf_evsel__cmp(evsel, nth_evsel(T_CYCLES_IN_TX_CP))) {
1181                 total = avg_stats(&runtime_cycles_stats[cpu]);
1182                 total2 = avg_stats(&runtime_cycles_in_tx_stats[cpu]);
1183                 if (total2 < avg)
1184                         total2 = avg;
1185                 if (total)
1186                         fprintf(output,
1187                                 " #   %5.2f%% aborted cycles         ",
1188                                 100.0 * ((total2-avg) / total));
1189         } else if (transaction_run &&
1190                    perf_evsel__cmp(evsel, nth_evsel(T_TRANSACTION_START)) &&
1191                    avg > 0 &&
1192                    runtime_cycles_in_tx_stats[cpu].n != 0) {
1193                 total = avg_stats(&runtime_cycles_in_tx_stats[cpu]);
1194
1195                 if (total)
1196                         ratio = total / avg;
1197
1198                 fprintf(output, " # %8.0f cycles / transaction   ", ratio);
1199         } else if (transaction_run &&
1200                    perf_evsel__cmp(evsel, nth_evsel(T_ELISION_START)) &&
1201                    avg > 0 &&
1202                    runtime_cycles_in_tx_stats[cpu].n != 0) {
1203                 total = avg_stats(&runtime_cycles_in_tx_stats[cpu]);
1204
1205                 if (total)
1206                         ratio = total / avg;
1207
1208                 fprintf(output, " # %8.0f cycles / elision       ", ratio);
1209         } else if (runtime_nsecs_stats[cpu].n != 0) {
1210                 char unit = 'M';
1211
1212                 total = avg_stats(&runtime_nsecs_stats[cpu]);
1213
1214                 if (total)
1215                         ratio = 1000.0 * avg / total;
1216                 if (ratio < 0.001) {
1217                         ratio *= 1000;
1218                         unit = 'K';
1219                 }
1220
1221                 fprintf(output, " # %8.3f %c/sec                  ", ratio, unit);
1222         } else {
1223                 fprintf(output, "                                   ");
1224         }
1225 }
1226
1227 static void print_aggr(char *prefix)
1228 {
1229         struct perf_evsel *counter;
1230         int cpu, cpu2, s, s2, id, nr;
1231         double uval;
1232         u64 ena, run, val;
1233
1234         if (!(aggr_map || aggr_get_id))
1235                 return;
1236
1237         for (s = 0; s < aggr_map->nr; s++) {
1238                 id = aggr_map->map[s];
1239                 evlist__for_each(evsel_list, counter) {
1240                         val = ena = run = 0;
1241                         nr = 0;
1242                         for (cpu = 0; cpu < perf_evsel__nr_cpus(counter); cpu++) {
1243                                 cpu2 = perf_evsel__cpus(counter)->map[cpu];
1244                                 s2 = aggr_get_id(evsel_list->cpus, cpu2);
1245                                 if (s2 != id)
1246                                         continue;
1247                                 val += counter->counts->cpu[cpu].val;
1248                                 ena += counter->counts->cpu[cpu].ena;
1249                                 run += counter->counts->cpu[cpu].run;
1250                                 nr++;
1251                         }
1252                         if (prefix)
1253                                 fprintf(output, "%s", prefix);
1254
1255                         if (run == 0 || ena == 0) {
1256                                 aggr_printout(counter, id, nr);
1257
1258                                 fprintf(output, "%*s%s",
1259                                         csv_output ? 0 : 18,
1260                                         counter->supported ? CNTR_NOT_COUNTED : CNTR_NOT_SUPPORTED,
1261                                         csv_sep);
1262
1263                                 fprintf(output, "%-*s%s",
1264                                         csv_output ? 0 : unit_width,
1265                                         counter->unit, csv_sep);
1266
1267                                 fprintf(output, "%*s",
1268                                         csv_output ? 0 : -25,
1269                                         perf_evsel__name(counter));
1270
1271                                 if (counter->cgrp)
1272                                         fprintf(output, "%s%s",
1273                                                 csv_sep, counter->cgrp->name);
1274
1275                                 print_running(run, ena);
1276                                 fputc('\n', output);
1277                                 continue;
1278                         }
1279                         uval = val * counter->scale;
1280
1281                         if (nsec_counter(counter))
1282                                 nsec_printout(id, nr, counter, uval);
1283                         else
1284                                 abs_printout(id, nr, counter, uval);
1285
1286                         if (!csv_output)
1287                                 print_noise(counter, 1.0);
1288
1289                         print_running(run, ena);
1290                         fputc('\n', output);
1291                 }
1292         }
1293 }
1294
1295 /*
1296  * Print out the results of a single counter:
1297  * aggregated counts in system-wide mode
1298  */
1299 static void print_counter_aggr(struct perf_evsel *counter, char *prefix)
1300 {
1301         struct perf_stat *ps = counter->priv;
1302         double avg = avg_stats(&ps->res_stats[0]);
1303         int scaled = counter->counts->scaled;
1304         double uval;
1305         double avg_enabled, avg_running;
1306
1307         avg_enabled = avg_stats(&ps->res_stats[1]);
1308         avg_running = avg_stats(&ps->res_stats[2]);
1309
1310         if (prefix)
1311                 fprintf(output, "%s", prefix);
1312
1313         if (scaled == -1 || !counter->supported) {
1314                 fprintf(output, "%*s%s",
1315                         csv_output ? 0 : 18,
1316                         counter->supported ? CNTR_NOT_COUNTED : CNTR_NOT_SUPPORTED,
1317                         csv_sep);
1318                 fprintf(output, "%-*s%s",
1319                         csv_output ? 0 : unit_width,
1320                         counter->unit, csv_sep);
1321                 fprintf(output, "%*s",
1322                         csv_output ? 0 : -25,
1323                         perf_evsel__name(counter));
1324
1325                 if (counter->cgrp)
1326                         fprintf(output, "%s%s", csv_sep, counter->cgrp->name);
1327
1328                 print_running(avg_running, avg_enabled);
1329                 fputc('\n', output);
1330                 return;
1331         }
1332
1333         uval = avg * counter->scale;
1334
1335         if (nsec_counter(counter))
1336                 nsec_printout(-1, 0, counter, uval);
1337         else
1338                 abs_printout(-1, 0, counter, uval);
1339
1340         print_noise(counter, avg);
1341
1342         print_running(avg_running, avg_enabled);
1343         fprintf(output, "\n");
1344 }
1345
1346 /*
1347  * Print out the results of a single counter:
1348  * does not use aggregated count in system-wide
1349  */
1350 static void print_counter(struct perf_evsel *counter, char *prefix)
1351 {
1352         u64 ena, run, val;
1353         double uval;
1354         int cpu;
1355
1356         for (cpu = 0; cpu < perf_evsel__nr_cpus(counter); cpu++) {
1357                 val = counter->counts->cpu[cpu].val;
1358                 ena = counter->counts->cpu[cpu].ena;
1359                 run = counter->counts->cpu[cpu].run;
1360
1361                 if (prefix)
1362                         fprintf(output, "%s", prefix);
1363
1364                 if (run == 0 || ena == 0) {
1365                         fprintf(output, "CPU%*d%s%*s%s",
1366                                 csv_output ? 0 : -4,
1367                                 perf_evsel__cpus(counter)->map[cpu], csv_sep,
1368                                 csv_output ? 0 : 18,
1369                                 counter->supported ? CNTR_NOT_COUNTED : CNTR_NOT_SUPPORTED,
1370                                 csv_sep);
1371
1372                                 fprintf(output, "%-*s%s",
1373                                         csv_output ? 0 : unit_width,
1374                                         counter->unit, csv_sep);
1375
1376                                 fprintf(output, "%*s",
1377                                         csv_output ? 0 : -25,
1378                                         perf_evsel__name(counter));
1379
1380                         if (counter->cgrp)
1381                                 fprintf(output, "%s%s",
1382                                         csv_sep, counter->cgrp->name);
1383
1384                         print_running(run, ena);
1385                         fputc('\n', output);
1386                         continue;
1387                 }
1388
1389                 uval = val * counter->scale;
1390
1391                 if (nsec_counter(counter))
1392                         nsec_printout(cpu, 0, counter, uval);
1393                 else
1394                         abs_printout(cpu, 0, counter, uval);
1395
1396                 if (!csv_output)
1397                         print_noise(counter, 1.0);
1398                 print_running(run, ena);
1399
1400                 fputc('\n', output);
1401         }
1402 }
1403
1404 static void print_stat(int argc, const char **argv)
1405 {
1406         struct perf_evsel *counter;
1407         int i;
1408
1409         fflush(stdout);
1410
1411         if (!csv_output) {
1412                 fprintf(output, "\n");
1413                 fprintf(output, " Performance counter stats for ");
1414                 if (target.system_wide)
1415                         fprintf(output, "\'system wide");
1416                 else if (target.cpu_list)
1417                         fprintf(output, "\'CPU(s) %s", target.cpu_list);
1418                 else if (!target__has_task(&target)) {
1419                         fprintf(output, "\'%s", argv[0]);
1420                         for (i = 1; i < argc; i++)
1421                                 fprintf(output, " %s", argv[i]);
1422                 } else if (target.pid)
1423                         fprintf(output, "process id \'%s", target.pid);
1424                 else
1425                         fprintf(output, "thread id \'%s", target.tid);
1426
1427                 fprintf(output, "\'");
1428                 if (run_count > 1)
1429                         fprintf(output, " (%d runs)", run_count);
1430                 fprintf(output, ":\n\n");
1431         }
1432
1433         switch (aggr_mode) {
1434         case AGGR_CORE:
1435         case AGGR_SOCKET:
1436                 print_aggr(NULL);
1437                 break;
1438         case AGGR_GLOBAL:
1439                 evlist__for_each(evsel_list, counter)
1440                         print_counter_aggr(counter, NULL);
1441                 break;
1442         case AGGR_NONE:
1443                 evlist__for_each(evsel_list, counter)
1444                         print_counter(counter, NULL);
1445                 break;
1446         default:
1447                 break;
1448         }
1449
1450         if (!csv_output) {
1451                 if (!null_run)
1452                         fprintf(output, "\n");
1453                 fprintf(output, " %17.9f seconds time elapsed",
1454                                 avg_stats(&walltime_nsecs_stats)/1e9);
1455                 if (run_count > 1) {
1456                         fprintf(output, "                                        ");
1457                         print_noise_pct(stddev_stats(&walltime_nsecs_stats),
1458                                         avg_stats(&walltime_nsecs_stats));
1459                 }
1460                 fprintf(output, "\n\n");
1461         }
1462 }
1463
1464 static volatile int signr = -1;
1465
1466 static void skip_signal(int signo)
1467 {
1468         if ((child_pid == -1) || interval)
1469                 done = 1;
1470
1471         signr = signo;
1472         /*
1473          * render child_pid harmless
1474          * won't send SIGTERM to a random
1475          * process in case of race condition
1476          * and fast PID recycling
1477          */
1478         child_pid = -1;
1479 }
1480
1481 static void sig_atexit(void)
1482 {
1483         sigset_t set, oset;
1484
1485         /*
1486          * avoid race condition with SIGCHLD handler
1487          * in skip_signal() which is modifying child_pid
1488          * goal is to avoid send SIGTERM to a random
1489          * process
1490          */
1491         sigemptyset(&set);
1492         sigaddset(&set, SIGCHLD);
1493         sigprocmask(SIG_BLOCK, &set, &oset);
1494
1495         if (child_pid != -1)
1496                 kill(child_pid, SIGTERM);
1497
1498         sigprocmask(SIG_SETMASK, &oset, NULL);
1499
1500         if (signr == -1)
1501                 return;
1502
1503         signal(signr, SIG_DFL);
1504         kill(getpid(), signr);
1505 }
1506
1507 static int stat__set_big_num(const struct option *opt __maybe_unused,
1508                              const char *s __maybe_unused, int unset)
1509 {
1510         big_num_opt = unset ? 0 : 1;
1511         return 0;
1512 }
1513
1514 static int perf_stat_init_aggr_mode(void)
1515 {
1516         switch (aggr_mode) {
1517         case AGGR_SOCKET:
1518                 if (cpu_map__build_socket_map(evsel_list->cpus, &aggr_map)) {
1519                         perror("cannot build socket map");
1520                         return -1;
1521                 }
1522                 aggr_get_id = cpu_map__get_socket;
1523                 break;
1524         case AGGR_CORE:
1525                 if (cpu_map__build_core_map(evsel_list->cpus, &aggr_map)) {
1526                         perror("cannot build core map");
1527                         return -1;
1528                 }
1529                 aggr_get_id = cpu_map__get_core;
1530                 break;
1531         case AGGR_NONE:
1532         case AGGR_GLOBAL:
1533         default:
1534                 break;
1535         }
1536         return 0;
1537 }
1538
1539 static int setup_events(const char * const *attrs, unsigned len)
1540 {
1541         unsigned i;
1542
1543         for (i = 0; i < len; i++) {
1544                 if (parse_events(evsel_list, attrs[i]))
1545                         return -1;
1546         }
1547         return 0;
1548 }
1549
1550 /*
1551  * Add default attributes, if there were no attributes specified or
1552  * if -d/--detailed, -d -d or -d -d -d is used:
1553  */
1554 static int add_default_attributes(void)
1555 {
1556         struct perf_event_attr default_attrs[] = {
1557
1558   { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_TASK_CLOCK              },
1559   { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_CONTEXT_SWITCHES        },
1560   { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_CPU_MIGRATIONS          },
1561   { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_PAGE_FAULTS             },
1562
1563   { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_CPU_CYCLES              },
1564   { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_STALLED_CYCLES_FRONTEND },
1565   { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_STALLED_CYCLES_BACKEND  },
1566   { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_INSTRUCTIONS            },
1567   { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_BRANCH_INSTRUCTIONS     },
1568   { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_BRANCH_MISSES           },
1569
1570 };
1571
1572 /*
1573  * Detailed stats (-d), covering the L1 and last level data caches:
1574  */
1575         struct perf_event_attr detailed_attrs[] = {
1576
1577   { .type = PERF_TYPE_HW_CACHE,
1578     .config =
1579          PERF_COUNT_HW_CACHE_L1D                <<  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_L1D                <<  0  |
1586         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
1587         (PERF_COUNT_HW_CACHE_RESULT_MISS        << 16)                          },
1588
1589   { .type = PERF_TYPE_HW_CACHE,
1590     .config =
1591          PERF_COUNT_HW_CACHE_LL                 <<  0  |
1592         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
1593         (PERF_COUNT_HW_CACHE_RESULT_ACCESS      << 16)                          },
1594
1595   { .type = PERF_TYPE_HW_CACHE,
1596     .config =
1597          PERF_COUNT_HW_CACHE_LL                 <<  0  |
1598         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
1599         (PERF_COUNT_HW_CACHE_RESULT_MISS        << 16)                          },
1600 };
1601
1602 /*
1603  * Very detailed stats (-d -d), covering the instruction cache and the TLB caches:
1604  */
1605         struct perf_event_attr very_detailed_attrs[] = {
1606
1607   { .type = PERF_TYPE_HW_CACHE,
1608     .config =
1609          PERF_COUNT_HW_CACHE_L1I                <<  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_L1I                <<  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_DTLB               <<  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_DTLB               <<  0  |
1628         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
1629         (PERF_COUNT_HW_CACHE_RESULT_MISS        << 16)                          },
1630
1631   { .type = PERF_TYPE_HW_CACHE,
1632     .config =
1633          PERF_COUNT_HW_CACHE_ITLB               <<  0  |
1634         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
1635         (PERF_COUNT_HW_CACHE_RESULT_ACCESS      << 16)                          },
1636
1637   { .type = PERF_TYPE_HW_CACHE,
1638     .config =
1639          PERF_COUNT_HW_CACHE_ITLB               <<  0  |
1640         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
1641         (PERF_COUNT_HW_CACHE_RESULT_MISS        << 16)                          },
1642
1643 };
1644
1645 /*
1646  * Very, very detailed stats (-d -d -d), adding prefetch events:
1647  */
1648         struct perf_event_attr very_very_detailed_attrs[] = {
1649
1650   { .type = PERF_TYPE_HW_CACHE,
1651     .config =
1652          PERF_COUNT_HW_CACHE_L1D                <<  0  |
1653         (PERF_COUNT_HW_CACHE_OP_PREFETCH        <<  8) |
1654         (PERF_COUNT_HW_CACHE_RESULT_ACCESS      << 16)                          },
1655
1656   { .type = PERF_TYPE_HW_CACHE,
1657     .config =
1658          PERF_COUNT_HW_CACHE_L1D                <<  0  |
1659         (PERF_COUNT_HW_CACHE_OP_PREFETCH        <<  8) |
1660         (PERF_COUNT_HW_CACHE_RESULT_MISS        << 16)                          },
1661 };
1662
1663         /* Set attrs if no event is selected and !null_run: */
1664         if (null_run)
1665                 return 0;
1666
1667         if (transaction_run) {
1668                 int err;
1669                 if (pmu_have_event("cpu", "cycles-ct") &&
1670                     pmu_have_event("cpu", "el-start"))
1671                         err = setup_events(transaction_attrs,
1672                                         ARRAY_SIZE(transaction_attrs));
1673                 else
1674                         err = setup_events(transaction_limited_attrs,
1675                                  ARRAY_SIZE(transaction_limited_attrs));
1676                 if (err < 0) {
1677                         fprintf(stderr, "Cannot set up transaction events\n");
1678                         return -1;
1679                 }
1680                 return 0;
1681         }
1682
1683         if (!evsel_list->nr_entries) {
1684                 if (perf_evlist__add_default_attrs(evsel_list, default_attrs) < 0)
1685                         return -1;
1686         }
1687
1688         /* Detailed events get appended to the event list: */
1689
1690         if (detailed_run <  1)
1691                 return 0;
1692
1693         /* Append detailed run extra attributes: */
1694         if (perf_evlist__add_default_attrs(evsel_list, detailed_attrs) < 0)
1695                 return -1;
1696
1697         if (detailed_run < 2)
1698                 return 0;
1699
1700         /* Append very detailed run extra attributes: */
1701         if (perf_evlist__add_default_attrs(evsel_list, very_detailed_attrs) < 0)
1702                 return -1;
1703
1704         if (detailed_run < 3)
1705                 return 0;
1706
1707         /* Append very, very detailed run extra attributes: */
1708         return perf_evlist__add_default_attrs(evsel_list, very_very_detailed_attrs);
1709 }
1710
1711 int cmd_stat(int argc, const char **argv, const char *prefix __maybe_unused)
1712 {
1713         bool append_file = false;
1714         int output_fd = 0;
1715         const char *output_name = NULL;
1716         const struct option options[] = {
1717         OPT_BOOLEAN('T', "transaction", &transaction_run,
1718                     "hardware transaction statistics"),
1719         OPT_CALLBACK('e', "event", &evsel_list, "event",
1720                      "event selector. use 'perf list' to list available events",
1721                      parse_events_option),
1722         OPT_CALLBACK(0, "filter", &evsel_list, "filter",
1723                      "event filter", parse_filter),
1724         OPT_BOOLEAN('i', "no-inherit", &no_inherit,
1725                     "child tasks do not inherit counters"),
1726         OPT_STRING('p', "pid", &target.pid, "pid",
1727                    "stat events on existing process id"),
1728         OPT_STRING('t', "tid", &target.tid, "tid",
1729                    "stat events on existing thread id"),
1730         OPT_BOOLEAN('a', "all-cpus", &target.system_wide,
1731                     "system-wide collection from all CPUs"),
1732         OPT_BOOLEAN('g', "group", &group,
1733                     "put the counters into a counter group"),
1734         OPT_BOOLEAN('c', "scale", &scale, "scale/normalize counters"),
1735         OPT_INCR('v', "verbose", &verbose,
1736                     "be more verbose (show counter open errors, etc)"),
1737         OPT_INTEGER('r', "repeat", &run_count,
1738                     "repeat command and print average + stddev (max: 100, forever: 0)"),
1739         OPT_BOOLEAN('n', "null", &null_run,
1740                     "null run - dont start any counters"),
1741         OPT_INCR('d', "detailed", &detailed_run,
1742                     "detailed run - start a lot of events"),
1743         OPT_BOOLEAN('S', "sync", &sync_run,
1744                     "call sync() before starting a run"),
1745         OPT_CALLBACK_NOOPT('B', "big-num", NULL, NULL,
1746                            "print large numbers with thousands\' separators",
1747                            stat__set_big_num),
1748         OPT_STRING('C', "cpu", &target.cpu_list, "cpu",
1749                     "list of cpus to monitor in system-wide"),
1750         OPT_SET_UINT('A', "no-aggr", &aggr_mode,
1751                     "disable CPU count aggregation", AGGR_NONE),
1752         OPT_STRING('x', "field-separator", &csv_sep, "separator",
1753                    "print counts with custom separator"),
1754         OPT_CALLBACK('G', "cgroup", &evsel_list, "name",
1755                      "monitor event in cgroup name only", parse_cgroups),
1756         OPT_STRING('o', "output", &output_name, "file", "output file name"),
1757         OPT_BOOLEAN(0, "append", &append_file, "append to the output file"),
1758         OPT_INTEGER(0, "log-fd", &output_fd,
1759                     "log output to fd, instead of stderr"),
1760         OPT_STRING(0, "pre", &pre_cmd, "command",
1761                         "command to run prior to the measured command"),
1762         OPT_STRING(0, "post", &post_cmd, "command",
1763                         "command to run after to the measured command"),
1764         OPT_UINTEGER('I', "interval-print", &interval,
1765                     "print counts at regular interval in ms (>= 100)"),
1766         OPT_SET_UINT(0, "per-socket", &aggr_mode,
1767                      "aggregate counts per processor socket", AGGR_SOCKET),
1768         OPT_SET_UINT(0, "per-core", &aggr_mode,
1769                      "aggregate counts per physical processor core", AGGR_CORE),
1770         OPT_UINTEGER('D', "delay", &initial_delay,
1771                      "ms to wait before starting measurement after program start"),
1772         OPT_END()
1773         };
1774         const char * const stat_usage[] = {
1775                 "perf stat [<options>] [<command>]",
1776                 NULL
1777         };
1778         int status = -EINVAL, run_idx;
1779         const char *mode;
1780
1781         setlocale(LC_ALL, "");
1782
1783         evsel_list = perf_evlist__new();
1784         if (evsel_list == NULL)
1785                 return -ENOMEM;
1786
1787         argc = parse_options(argc, argv, options, stat_usage,
1788                 PARSE_OPT_STOP_AT_NON_OPTION);
1789
1790         output = stderr;
1791         if (output_name && strcmp(output_name, "-"))
1792                 output = NULL;
1793
1794         if (output_name && output_fd) {
1795                 fprintf(stderr, "cannot use both --output and --log-fd\n");
1796                 parse_options_usage(stat_usage, options, "o", 1);
1797                 parse_options_usage(NULL, options, "log-fd", 0);
1798                 goto out;
1799         }
1800
1801         if (output_fd < 0) {
1802                 fprintf(stderr, "argument to --log-fd must be a > 0\n");
1803                 parse_options_usage(stat_usage, options, "log-fd", 0);
1804                 goto out;
1805         }
1806
1807         if (!output) {
1808                 struct timespec tm;
1809                 mode = append_file ? "a" : "w";
1810
1811                 output = fopen(output_name, mode);
1812                 if (!output) {
1813                         perror("failed to create output file");
1814                         return -1;
1815                 }
1816                 clock_gettime(CLOCK_REALTIME, &tm);
1817                 fprintf(output, "# started on %s\n", ctime(&tm.tv_sec));
1818         } else if (output_fd > 0) {
1819                 mode = append_file ? "a" : "w";
1820                 output = fdopen(output_fd, mode);
1821                 if (!output) {
1822                         perror("Failed opening logfd");
1823                         return -errno;
1824                 }
1825         }
1826
1827         if (csv_sep) {
1828                 csv_output = true;
1829                 if (!strcmp(csv_sep, "\\t"))
1830                         csv_sep = "\t";
1831         } else
1832                 csv_sep = DEFAULT_SEPARATOR;
1833
1834         /*
1835          * let the spreadsheet do the pretty-printing
1836          */
1837         if (csv_output) {
1838                 /* User explicitly passed -B? */
1839                 if (big_num_opt == 1) {
1840                         fprintf(stderr, "-B option not supported with -x\n");
1841                         parse_options_usage(stat_usage, options, "B", 1);
1842                         parse_options_usage(NULL, options, "x", 1);
1843                         goto out;
1844                 } else /* Nope, so disable big number formatting */
1845                         big_num = false;
1846         } else if (big_num_opt == 0) /* User passed --no-big-num */
1847                 big_num = false;
1848
1849         if (!argc && target__none(&target))
1850                 usage_with_options(stat_usage, options);
1851
1852         if (run_count < 0) {
1853                 pr_err("Run count must be a positive number\n");
1854                 parse_options_usage(stat_usage, options, "r", 1);
1855                 goto out;
1856         } else if (run_count == 0) {
1857                 forever = true;
1858                 run_count = 1;
1859         }
1860
1861         /* no_aggr, cgroup are for system-wide only */
1862         if ((aggr_mode != AGGR_GLOBAL || nr_cgroups) &&
1863             !target__has_cpu(&target)) {
1864                 fprintf(stderr, "both cgroup and no-aggregation "
1865                         "modes only available in system-wide mode\n");
1866
1867                 parse_options_usage(stat_usage, options, "G", 1);
1868                 parse_options_usage(NULL, options, "A", 1);
1869                 parse_options_usage(NULL, options, "a", 1);
1870                 goto out;
1871         }
1872
1873         if (add_default_attributes())
1874                 goto out;
1875
1876         target__validate(&target);
1877
1878         if (perf_evlist__create_maps(evsel_list, &target) < 0) {
1879                 if (target__has_task(&target)) {
1880                         pr_err("Problems finding threads of monitor\n");
1881                         parse_options_usage(stat_usage, options, "p", 1);
1882                         parse_options_usage(NULL, options, "t", 1);
1883                 } else if (target__has_cpu(&target)) {
1884                         perror("failed to parse CPUs map");
1885                         parse_options_usage(stat_usage, options, "C", 1);
1886                         parse_options_usage(NULL, options, "a", 1);
1887                 }
1888                 goto out;
1889         }
1890         if (interval && interval < 100) {
1891                 pr_err("print interval must be >= 100ms\n");
1892                 parse_options_usage(stat_usage, options, "I", 1);
1893                 goto out;
1894         }
1895
1896         if (perf_evlist__alloc_stats(evsel_list, interval))
1897                 goto out;
1898
1899         if (perf_stat_init_aggr_mode())
1900                 goto out;
1901
1902         /*
1903          * We dont want to block the signals - that would cause
1904          * child tasks to inherit that and Ctrl-C would not work.
1905          * What we want is for Ctrl-C to work in the exec()-ed
1906          * task, but being ignored by perf stat itself:
1907          */
1908         atexit(sig_atexit);
1909         if (!forever)
1910                 signal(SIGINT,  skip_signal);
1911         signal(SIGCHLD, skip_signal);
1912         signal(SIGALRM, skip_signal);
1913         signal(SIGABRT, skip_signal);
1914
1915         status = 0;
1916         for (run_idx = 0; forever || run_idx < run_count; run_idx++) {
1917                 if (run_count != 1 && verbose)
1918                         fprintf(output, "[ perf stat: executing run #%d ... ]\n",
1919                                 run_idx + 1);
1920
1921                 status = run_perf_stat(argc, argv);
1922                 if (forever && status != -1) {
1923                         print_stat(argc, argv);
1924                         perf_stat__reset_stats(evsel_list);
1925                 }
1926         }
1927
1928         if (!forever && status != -1 && !interval)
1929                 print_stat(argc, argv);
1930
1931         perf_evlist__free_stats(evsel_list);
1932 out:
1933         perf_evlist__delete(evsel_list);
1934         return status;
1935 }