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 *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 * transaction_limited_attrs = {
  90         "task-clock,"
  91         "{"
  92         "instructions,"
  93         "cycles,"
  94         "cpu/cycles-t/,"
  95         "cpu/tx-start/"
  96         "}"
  97 };
  98
  99 static struct perf_evlist       *evsel_list;
 100
 101 static struct target target = {
 102         .uid    = UINT_MAX,
 103 };
 104
 105 enum aggr_mode {
 106         AGGR_NONE,
 107         AGGR_GLOBAL,
 108         AGGR_SOCKET,
 109         AGGR_CORE,
 110 };
 111
 112 static int                      run_count                       =  1;
 113 static bool                     no_inherit                      = false;
 114 static bool                     scale                           =  true;
 115 static enum aggr_mode           aggr_mode                       = AGGR_GLOBAL;
 116 static volatile pid_t           child_pid                       = -1;
 117 static bool                     null_run                        =  false;
 118 static int                      detailed_run                    =  0;
 119 static bool                     transaction_run;
 120 static bool                     big_num                         =  true;
 121 static int                      big_num_opt                     =  -1;
 122 static const char               *csv_sep                        = NULL;
 123 static bool                     csv_output                      = false;
 124 static bool                     group                           = false;
 125 static FILE                     *output                         = NULL;
 126 static const char               *pre_cmd                        = NULL;
 127 static const char               *post_cmd                       = NULL;
 128 static bool                     sync_run                        = false;
 129 static unsigned int             interval                        = 0;
 130 static unsigned int             initial_delay                   = 0;
 131 static unsigned int             unit_width                      = 4; /* strlen("unit") */
 132 static bool                     forever                         = false;
 133 static struct timespec          ref_time;
 134 static struct cpu_map           *aggr_map;
 135 static int                      (*aggr_get_id)(struct cpu_map *m, int cpu);
 136
 137 static volatile int done = 0;
 138
 139 static inline void diff_timespec(struct timespec *r, struct timespec *a,
 140                                  struct timespec *b)
 141 {
 142         r->tv_sec = a->tv_sec - b->tv_sec;
 143         if (a->tv_nsec < b->tv_nsec) {
 144                 r->tv_nsec = a->tv_nsec + 1000000000L - b->tv_nsec;
 145                 r->tv_sec--;
 146         } else {
 147                 r->tv_nsec = a->tv_nsec - b->tv_nsec ;
 148         }
 149 }
 150
 151 static inline struct cpu_map *perf_evsel__cpus(struct perf_evsel *evsel)
 152 {
 153         return (evsel->cpus && !target.cpu_list) ? evsel->cpus : evsel_list->cpus;
 154 }
 155
 156 static inline int perf_evsel__nr_cpus(struct perf_evsel *evsel)
 157 {
 158         return perf_evsel__cpus(evsel)->nr;
 159 }
 160
 161 static void perf_evsel__reset_stat_priv(struct perf_evsel *evsel)
 162 {
 163         int i;
 164         struct perf_stat *ps = evsel->priv;
 165
 166         for (i = 0; i < 3; i++)
 167                 init_stats(&ps->res_stats[i]);
 168
 169         perf_stat_evsel_id_init(evsel);
 170 }
 171
 172 static int perf_evsel__alloc_stat_priv(struct perf_evsel *evsel)
 173 {
 174         evsel->priv = zalloc(sizeof(struct perf_stat));
 175         if (evsel->priv == NULL)
 176                 return -ENOMEM;
 177         perf_evsel__reset_stat_priv(evsel);
 178         return 0;
 179 }
 180
 181 static void perf_evsel__free_stat_priv(struct perf_evsel *evsel)
 182 {
 183         zfree(&evsel->priv);
 184 }
 185
 186 static int perf_evsel__alloc_prev_raw_counts(struct perf_evsel *evsel)
 187 {
 188         void *addr;
 189         size_t sz;
 190
 191         sz = sizeof(*evsel->counts) +
 192              (perf_evsel__nr_cpus(evsel) * sizeof(struct perf_counts_values));
 193
 194         addr = zalloc(sz);
 195         if (!addr)
 196                 return -ENOMEM;
 197
 198         evsel->prev_raw_counts =  addr;
 199
 200         return 0;
 201 }
 202
 203 static void perf_evsel__free_prev_raw_counts(struct perf_evsel *evsel)
 204 {
 205         zfree(&evsel->prev_raw_counts);
 206 }
 207
 208 static void perf_evlist__free_stats(struct perf_evlist *evlist)
 209 {
 210         struct perf_evsel *evsel;
 211
 212         evlist__for_each(evlist, evsel) {
 213                 perf_evsel__free_stat_priv(evsel);
 214                 perf_evsel__free_counts(evsel);
 215                 perf_evsel__free_prev_raw_counts(evsel);
 216         }
 217 }
 218
 219 static int perf_evlist__alloc_stats(struct perf_evlist *evlist, bool alloc_raw)
 220 {
 221         struct perf_evsel *evsel;
 222
 223         evlist__for_each(evlist, evsel) {
 224                 if (perf_evsel__alloc_stat_priv(evsel) < 0 ||
 225                     perf_evsel__alloc_counts(evsel, perf_evsel__nr_cpus(evsel)) < 0 ||
 226                     (alloc_raw && perf_evsel__alloc_prev_raw_counts(evsel) < 0))
 227                         goto out_free;
 228         }
 229
 230         return 0;
 231
 232 out_free:
 233         perf_evlist__free_stats(evlist);
 234         return -1;
 235 }
 236
 237 enum {
 238         CTX_BIT_USER    = 1 << 0,
 239         CTX_BIT_KERNEL  = 1 << 1,
 240         CTX_BIT_HV      = 1 << 2,
 241         CTX_BIT_HOST    = 1 << 3,
 242         CTX_BIT_IDLE    = 1 << 4,
 243         CTX_BIT_MAX     = 1 << 5,
 244 };
 245
 246 #define NUM_CTX CTX_BIT_MAX
 247
 248 static struct stats runtime_nsecs_stats[MAX_NR_CPUS];
 249 static struct stats runtime_cycles_stats[NUM_CTX][MAX_NR_CPUS];
 250 static struct stats runtime_stalled_cycles_front_stats[NUM_CTX][MAX_NR_CPUS];
 251 static struct stats runtime_stalled_cycles_back_stats[NUM_CTX][MAX_NR_CPUS];
 252 static struct stats runtime_branches_stats[NUM_CTX][MAX_NR_CPUS];
 253 static struct stats runtime_cacherefs_stats[NUM_CTX][MAX_NR_CPUS];
 254 static struct stats runtime_l1_dcache_stats[NUM_CTX][MAX_NR_CPUS];
 255 static struct stats runtime_l1_icache_stats[NUM_CTX][MAX_NR_CPUS];
 256 static struct stats runtime_ll_cache_stats[NUM_CTX][MAX_NR_CPUS];
 257 static struct stats runtime_itlb_cache_stats[NUM_CTX][MAX_NR_CPUS];
 258 static struct stats runtime_dtlb_cache_stats[NUM_CTX][MAX_NR_CPUS];
 259 static struct stats runtime_cycles_in_tx_stats[NUM_CTX][MAX_NR_CPUS];
 260 static struct stats walltime_nsecs_stats;
 261 static struct stats runtime_transaction_stats[NUM_CTX][MAX_NR_CPUS];
 262 static struct stats runtime_elision_stats[NUM_CTX][MAX_NR_CPUS];
 263
 264 static int evsel_context(struct perf_evsel *evsel)
 265 {
 266         int ctx = 0;
 267
 268         if (evsel->attr.exclude_kernel)
 269                 ctx |= CTX_BIT_KERNEL;
 270         if (evsel->attr.exclude_user)
 271                 ctx |= CTX_BIT_USER;
 272         if (evsel->attr.exclude_hv)
 273                 ctx |= CTX_BIT_HV;
 274         if (evsel->attr.exclude_host)
 275                 ctx |= CTX_BIT_HOST;
 276         if (evsel->attr.exclude_idle)
 277                 ctx |= CTX_BIT_IDLE;
 278
 279         return ctx;
 280 }
 281
 282 static void reset_shadow_stats(void)
 283 {
 284         memset(runtime_nsecs_stats, 0, sizeof(runtime_nsecs_stats));
 285         memset(runtime_cycles_stats, 0, sizeof(runtime_cycles_stats));
 286         memset(runtime_stalled_cycles_front_stats, 0, sizeof(runtime_stalled_cycles_front_stats));
 287         memset(runtime_stalled_cycles_back_stats, 0, sizeof(runtime_stalled_cycles_back_stats));
 288         memset(runtime_branches_stats, 0, sizeof(runtime_branches_stats));
 289         memset(runtime_cacherefs_stats, 0, sizeof(runtime_cacherefs_stats));
 290         memset(runtime_l1_dcache_stats, 0, sizeof(runtime_l1_dcache_stats));
 291         memset(runtime_l1_icache_stats, 0, sizeof(runtime_l1_icache_stats));
 292         memset(runtime_ll_cache_stats, 0, sizeof(runtime_ll_cache_stats));
 293         memset(runtime_itlb_cache_stats, 0, sizeof(runtime_itlb_cache_stats));
 294         memset(runtime_dtlb_cache_stats, 0, sizeof(runtime_dtlb_cache_stats));
 295         memset(runtime_cycles_in_tx_stats, 0,
 296                         sizeof(runtime_cycles_in_tx_stats));
 297         memset(runtime_transaction_stats, 0,
 298                 sizeof(runtime_transaction_stats));
 299         memset(runtime_elision_stats, 0, sizeof(runtime_elision_stats));
 300         memset(&walltime_nsecs_stats, 0, sizeof(walltime_nsecs_stats));
 301 }
 302
 303 static void perf_stat__reset_stats(struct perf_evlist *evlist)
 304 {
 305         struct perf_evsel *evsel;
 306
 307         evlist__for_each(evlist, evsel) {
 308                 perf_evsel__reset_stat_priv(evsel);
 309                 perf_evsel__reset_counts(evsel, perf_evsel__nr_cpus(evsel));
 310         }
 311
 312         reset_shadow_stats();
 313 }
 314
 315 static int create_perf_stat_counter(struct perf_evsel *evsel)
 316 {
 317         struct perf_event_attr *attr = &evsel->attr;
 318
 319         if (scale)
 320                 attr->read_format = PERF_FORMAT_TOTAL_TIME_ENABLED |
 321                                     PERF_FORMAT_TOTAL_TIME_RUNNING;
 322
 323         attr->inherit = !no_inherit;
 324
 325         if (target__has_cpu(&target))
 326                 return perf_evsel__open_per_cpu(evsel, perf_evsel__cpus(evsel));
 327
 328         if (!target__has_task(&target) && perf_evsel__is_group_leader(evsel)) {
 329                 attr->disabled = 1;
 330                 if (!initial_delay)
 331                         attr->enable_on_exec = 1;
 332         }
 333
 334         return perf_evsel__open_per_thread(evsel, evsel_list->threads);
 335 }
 336
 337 /*
 338  * Does the counter have nsecs as a unit?
 339  */
 340 static inline int nsec_counter(struct perf_evsel *evsel)
 341 {
 342         if (perf_evsel__match(evsel, SOFTWARE, SW_CPU_CLOCK) ||
 343             perf_evsel__match(evsel, SOFTWARE, SW_TASK_CLOCK))
 344                 return 1;
 345
 346         return 0;
 347 }
 348
 349 /*
 350  * Update various tracking values we maintain to print
 351  * more semantic information such as miss/hit ratios,
 352  * instruction rates, etc:
 353  */
 354 static void update_shadow_stats(struct perf_evsel *counter, u64 *count,
 355                                 int cpu)
 356 {
 357         int ctx = evsel_context(counter);
 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[ctx][cpu], count[0]);
 363         else if (perf_stat_evsel__is(counter, CYCLES_IN_TX))
 364                 update_stats(&runtime_transaction_stats[ctx][cpu], count[0]);
 365         else if (perf_stat_evsel__is(counter, TRANSACTION_START))
 366                 update_stats(&runtime_transaction_stats[ctx][cpu], count[0]);
 367         else if (perf_stat_evsel__is(counter, ELISION_START))
 368                 update_stats(&runtime_elision_stats[ctx][cpu], count[0]);
 369         else if (perf_evsel__match(counter, HARDWARE, HW_STALLED_CYCLES_FRONTEND))
 370                 update_stats(&runtime_stalled_cycles_front_stats[ctx][cpu], count[0]);
 371         else if (perf_evsel__match(counter, HARDWARE, HW_STALLED_CYCLES_BACKEND))
 372                 update_stats(&runtime_stalled_cycles_back_stats[ctx][cpu], count[0]);
 373         else if (perf_evsel__match(counter, HARDWARE, HW_BRANCH_INSTRUCTIONS))
 374                 update_stats(&runtime_branches_stats[ctx][cpu], count[0]);
 375         else if (perf_evsel__match(counter, HARDWARE, HW_CACHE_REFERENCES))
 376                 update_stats(&runtime_cacherefs_stats[ctx][cpu], count[0]);
 377         else if (perf_evsel__match(counter, HW_CACHE, HW_CACHE_L1D))
 378                 update_stats(&runtime_l1_dcache_stats[ctx][cpu], count[0]);
 379         else if (perf_evsel__match(counter, HW_CACHE, HW_CACHE_L1I))
 380                 update_stats(&runtime_ll_cache_stats[ctx][cpu], count[0]);
 381         else if (perf_evsel__match(counter, HW_CACHE, HW_CACHE_LL))
 382                 update_stats(&runtime_ll_cache_stats[ctx][cpu], count[0]);
 383         else if (perf_evsel__match(counter, HW_CACHE, HW_CACHE_DTLB))
 384                 update_stats(&runtime_dtlb_cache_stats[ctx][cpu], count[0]);
 385         else if (perf_evsel__match(counter, HW_CACHE, HW_CACHE_ITLB))
 386                 update_stats(&runtime_itlb_cache_stats[ctx][cpu], count[0]);
 387 }
 388
 389 static void zero_per_pkg(struct perf_evsel *counter)
 390 {
 391         if (counter->per_pkg_mask)
 392                 memset(counter->per_pkg_mask, 0, MAX_NR_CPUS);
 393 }
 394
 395 static int check_per_pkg(struct perf_evsel *counter, int cpu, bool *skip)
 396 {
 397         unsigned long *mask = counter->per_pkg_mask;
 398         struct cpu_map *cpus = perf_evsel__cpus(counter);
 399         int s;
 400
 401         *skip = false;
 402
 403         if (!counter->per_pkg)
 404                 return 0;
 405
 406         if (cpu_map__empty(cpus))
 407                 return 0;
 408
 409         if (!mask) {
 410                 mask = zalloc(MAX_NR_CPUS);
 411                 if (!mask)
 412                         return -ENOMEM;
 413
 414                 counter->per_pkg_mask = mask;
 415         }
 416
 417         s = cpu_map__get_socket(cpus, cpu);
 418         if (s < 0)
 419                 return -1;
 420
 421         *skip = test_and_set_bit(s, mask) == 1;
 422         return 0;
 423 }
 424
 425 static int read_cb(struct perf_evsel *evsel, int cpu, int thread __maybe_unused,
 426                    struct perf_counts_values *count)
 427 {
 428         struct perf_counts_values *aggr = &evsel->counts->aggr;
 429         static struct perf_counts_values zero;
 430         bool skip = false;
 431
 432         if (check_per_pkg(evsel, cpu, &skip)) {
 433                 pr_err("failed to read per-pkg counter\n");
 434                 return -1;
 435         }
 436
 437         if (skip)
 438                 count = &zero;
 439
 440         switch (aggr_mode) {
 441         case AGGR_CORE:
 442         case AGGR_SOCKET:
 443         case AGGR_NONE:
 444                 if (!evsel->snapshot)
 445                         perf_evsel__compute_deltas(evsel, cpu, count);
 446                 perf_counts_values__scale(count, scale, NULL);
 447                 evsel->counts->cpu[cpu] = *count;
 448                 if (aggr_mode == AGGR_NONE)
 449                         update_shadow_stats(evsel, count->values, cpu);
 450                 break;
 451         case AGGR_GLOBAL:
 452                 aggr->val += count->val;
 453                 if (scale) {
 454                         aggr->ena += count->ena;
 455                         aggr->run += count->run;
 456                 }
 457         default:
 458                 break;
 459         }
 460
 461         return 0;
 462 }
 463
 464 static int read_counter(struct perf_evsel *counter);
 465
 466 /*
 467  * Read out the results of a single counter:
 468  * aggregate counts across CPUs in system-wide mode
 469  */
 470 static int read_counter_aggr(struct perf_evsel *counter)
 471 {
 472         struct perf_counts_values *aggr = &counter->counts->aggr;
 473         struct perf_stat *ps = counter->priv;
 474         u64 *count = counter->counts->aggr.values;
 475         int i;
 476
 477         aggr->val = aggr->ena = aggr->run = 0;
 478
 479         if (read_counter(counter))
 480                 return -1;
 481
 482         if (!counter->snapshot)
 483                 perf_evsel__compute_deltas(counter, -1, aggr);
 484         perf_counts_values__scale(aggr, scale, &counter->counts->scaled);
 485
 486         for (i = 0; i < 3; i++)
 487                 update_stats(&ps->res_stats[i], count[i]);
 488
 489         if (verbose) {
 490                 fprintf(output, "%s: %" PRIu64 " %" PRIu64 " %" PRIu64 "\n",
 491                         perf_evsel__name(counter), count[0], count[1], count[2]);
 492         }
 493
 494         /*
 495          * Save the full runtime - to allow normalization during printout:
 496          */
 497         update_shadow_stats(counter, count, 0);
 498
 499         return 0;
 500 }
 501
 502 /*
 503  * Read out the results of a single counter:
 504  * do not aggregate counts across CPUs in system-wide mode
 505  */
 506 static int read_counter(struct perf_evsel *counter)
 507 {
 508         int nthreads = thread_map__nr(evsel_list->threads);
 509         int ncpus = perf_evsel__nr_cpus(counter);
 510         int cpu, thread;
 511
 512         if (!counter->supported)
 513                 return -ENOENT;
 514
 515         if (counter->system_wide)
 516                 nthreads = 1;
 517
 518         if (counter->per_pkg)
 519                 zero_per_pkg(counter);
 520
 521         for (thread = 0; thread < nthreads; thread++) {
 522                 for (cpu = 0; cpu < ncpus; cpu++) {
 523                         if (perf_evsel__read_cb(counter, cpu, thread, read_cb))
 524                                 return -1;
 525                 }
 526         }
 527
 528         return 0;
 529 }
 530
 531 static void print_interval(void)
 532 {
 533         static int num_print_interval;
 534         struct perf_evsel *counter;
 535         struct perf_stat *ps;
 536         struct timespec ts, rs;
 537         char prefix[64];
 538
 539         if (aggr_mode == AGGR_GLOBAL) {
 540                 evlist__for_each(evsel_list, counter) {
 541                         ps = counter->priv;
 542                         memset(ps->res_stats, 0, sizeof(ps->res_stats));
 543                         read_counter_aggr(counter);
 544                 }
 545         } else  {
 546                 evlist__for_each(evsel_list, counter) {
 547                         ps = counter->priv;
 548                         memset(ps->res_stats, 0, sizeof(ps->res_stats));
 549                         read_counter(counter);
 550                 }
 551         }
 552
 553         clock_gettime(CLOCK_MONOTONIC, &ts);
 554         diff_timespec(&rs, &ts, &ref_time);
 555         sprintf(prefix, "%6lu.%09lu%s", rs.tv_sec, rs.tv_nsec, csv_sep);
 556
 557         if (num_print_interval == 0 && !csv_output) {
 558                 switch (aggr_mode) {
 559                 case AGGR_SOCKET:
 560                         fprintf(output, "#           time socket cpus             counts %*s events\n", unit_width, "unit");
 561                         break;
 562                 case AGGR_CORE:
 563                         fprintf(output, "#           time core         cpus             counts %*s events\n", unit_width, "unit");
 564                         break;
 565                 case AGGR_NONE:
 566                         fprintf(output, "#           time CPU                counts %*s events\n", unit_width, "unit");
 567                         break;
 568                 case AGGR_GLOBAL:
 569                 default:
 570                         fprintf(output, "#           time             counts %*s events\n", unit_width, "unit");
 571                 }
 572         }
 573
 574         if (++num_print_interval == 25)
 575                 num_print_interval = 0;
 576
 577         switch (aggr_mode) {
 578         case AGGR_CORE:
 579         case AGGR_SOCKET:
 580                 print_aggr(prefix);
 581                 break;
 582         case AGGR_NONE:
 583                 evlist__for_each(evsel_list, counter)
 584                         print_counter(counter, prefix);
 585                 break;
 586         case AGGR_GLOBAL:
 587         default:
 588                 evlist__for_each(evsel_list, counter)
 589                         print_counter_aggr(counter, prefix);
 590         }
 591
 592         fflush(output);
 593 }
 594
 595 static void handle_initial_delay(void)
 596 {
 597         struct perf_evsel *counter;
 598
 599         if (initial_delay) {
 600                 const int ncpus = cpu_map__nr(evsel_list->cpus),
 601                         nthreads = thread_map__nr(evsel_list->threads);
 602
 603                 usleep(initial_delay * 1000);
 604                 evlist__for_each(evsel_list, counter)
 605                         perf_evsel__enable(counter, ncpus, nthreads);
 606         }
 607 }
 608
 609 static volatile int workload_exec_errno;
 610
 611 /*
 612  * perf_evlist__prepare_workload will send a SIGUSR1
 613  * if the fork fails, since we asked by setting its
 614  * want_signal to true.
 615  */
 616 static void workload_exec_failed_signal(int signo __maybe_unused, siginfo_t *info,
 617                                         void *ucontext __maybe_unused)
 618 {
 619         workload_exec_errno = info->si_value.sival_int;
 620 }
 621
 622 static int __run_perf_stat(int argc, const char **argv)
 623 {
 624         char msg[512];
 625         unsigned long long t0, t1;
 626         struct perf_evsel *counter;
 627         struct timespec ts;
 628         size_t l;
 629         int status = 0;
 630         const bool forks = (argc > 0);
 631
 632         if (interval) {
 633                 ts.tv_sec  = interval / 1000;
 634                 ts.tv_nsec = (interval % 1000) * 1000000;
 635         } else {
 636                 ts.tv_sec  = 1;
 637                 ts.tv_nsec = 0;
 638         }
 639
 640         if (forks) {
 641                 if (perf_evlist__prepare_workload(evsel_list, &target, argv, false,
 642                                                   workload_exec_failed_signal) < 0) {
 643                         perror("failed to prepare workload");
 644                         return -1;
 645                 }
 646                 child_pid = evsel_list->workload.pid;
 647         }
 648
 649         if (group)
 650                 perf_evlist__set_leader(evsel_list);
 651
 652         evlist__for_each(evsel_list, counter) {
 653                 if (create_perf_stat_counter(counter) < 0) {
 654                         /*
 655                          * PPC returns ENXIO for HW counters until 2.6.37
 656                          * (behavior changed with commit b0a873e).
 657                          */
 658                         if (errno == EINVAL || errno == ENOSYS ||
 659                             errno == ENOENT || errno == EOPNOTSUPP ||
 660                             errno == ENXIO) {
 661                                 if (verbose)
 662                                         ui__warning("%s event is not supported by the kernel.\n",
 663                                                     perf_evsel__name(counter));
 664                                 counter->supported = false;
 665                                 continue;
 666                         }
 667
 668                         perf_evsel__open_strerror(counter, &target,
 669                                                   errno, msg, sizeof(msg));
 670                         ui__error("%s\n", msg);
 671
 672                         if (child_pid != -1)
 673                                 kill(child_pid, SIGTERM);
 674
 675                         return -1;
 676                 }
 677                 counter->supported = true;
 678
 679                 l = strlen(counter->unit);
 680                 if (l > unit_width)
 681                         unit_width = l;
 682         }
 683
 684         if (perf_evlist__apply_filters(evsel_list, &counter)) {
 685                 error("failed to set filter \"%s\" on event %s with %d (%s)\n",
 686                         counter->filter, perf_evsel__name(counter), errno,
 687                         strerror_r(errno, msg, sizeof(msg)));
 688                 return -1;
 689         }
 690
 691         /*
 692          * Enable counters and exec the command:
 693          */
 694         t0 = rdclock();
 695         clock_gettime(CLOCK_MONOTONIC, &ref_time);
 696
 697         if (forks) {
 698                 perf_evlist__start_workload(evsel_list);
 699                 handle_initial_delay();
 700
 701                 if (interval) {
 702                         while (!waitpid(child_pid, &status, WNOHANG)) {
 703                                 nanosleep(&ts, NULL);
 704                                 print_interval();
 705                         }
 706                 }
 707                 wait(&status);
 708
 709                 if (workload_exec_errno) {
 710                         const char *emsg = strerror_r(workload_exec_errno, msg, sizeof(msg));
 711                         pr_err("Workload failed: %s\n", emsg);
 712                         return -1;
 713                 }
 714
 715                 if (WIFSIGNALED(status))
 716                         psignal(WTERMSIG(status), argv[0]);
 717         } else {
 718                 handle_initial_delay();
 719                 while (!done) {
 720                         nanosleep(&ts, NULL);
 721                         if (interval)
 722                                 print_interval();
 723                 }
 724         }
 725
 726         t1 = rdclock();
 727
 728         update_stats(&walltime_nsecs_stats, t1 - t0);
 729
 730         if (aggr_mode == AGGR_GLOBAL) {
 731                 evlist__for_each(evsel_list, counter) {
 732                         read_counter_aggr(counter);
 733                         perf_evsel__close_fd(counter, perf_evsel__nr_cpus(counter),
 734                                              thread_map__nr(evsel_list->threads));
 735                 }
 736         } else {
 737                 evlist__for_each(evsel_list, counter) {
 738                         read_counter(counter);
 739                         perf_evsel__close_fd(counter, perf_evsel__nr_cpus(counter), 1);
 740                 }
 741         }
 742
 743         return WEXITSTATUS(status);
 744 }
 745
 746 static int run_perf_stat(int argc, const char **argv)
 747 {
 748         int ret;
 749
 750         if (pre_cmd) {
 751                 ret = system(pre_cmd);
 752                 if (ret)
 753                         return ret;
 754         }
 755
 756         if (sync_run)
 757                 sync();
 758
 759         ret = __run_perf_stat(argc, argv);
 760         if (ret)
 761                 return ret;
 762
 763         if (post_cmd) {
 764                 ret = system(post_cmd);
 765                 if (ret)
 766                         return ret;
 767         }
 768
 769         return ret;
 770 }
 771
 772 static void print_running(u64 run, u64 ena)
 773 {
 774         if (csv_output) {
 775                 fprintf(output, "%s%" PRIu64 "%s%.2f",
 776                                         csv_sep,
 777                                         run,
 778                                         csv_sep,
 779                                         ena ? 100.0 * run / ena : 100.0);
 780         } else if (run != ena) {
 781                 fprintf(output, "  (%.2f%%)", 100.0 * run / ena);
 782         }
 783 }
 784
 785 static void print_noise_pct(double total, double avg)
 786 {
 787         double pct = rel_stddev_stats(total, avg);
 788
 789         if (csv_output)
 790                 fprintf(output, "%s%.2f%%", csv_sep, pct);
 791         else if (pct)
 792                 fprintf(output, "  ( +-%6.2f%% )", pct);
 793 }
 794
 795 static void print_noise(struct perf_evsel *evsel, double avg)
 796 {
 797         struct perf_stat *ps;
 798
 799         if (run_count == 1)
 800                 return;
 801
 802         ps = evsel->priv;
 803         print_noise_pct(stddev_stats(&ps->res_stats[0]), avg);
 804 }
 805
 806 static void aggr_printout(struct perf_evsel *evsel, int id, int nr)
 807 {
 808         switch (aggr_mode) {
 809         case AGGR_CORE:
 810                 fprintf(output, "S%d-C%*d%s%*d%s",
 811                         cpu_map__id_to_socket(id),
 812                         csv_output ? 0 : -8,
 813                         cpu_map__id_to_cpu(id),
 814                         csv_sep,
 815                         csv_output ? 0 : 4,
 816                         nr,
 817                         csv_sep);
 818                 break;
 819         case AGGR_SOCKET:
 820                 fprintf(output, "S%*d%s%*d%s",
 821                         csv_output ? 0 : -5,
 822                         id,
 823                         csv_sep,
 824                         csv_output ? 0 : 4,
 825                         nr,
 826                         csv_sep);
 827                         break;
 828         case AGGR_NONE:
 829                 fprintf(output, "CPU%*d%s",
 830                         csv_output ? 0 : -4,
 831                         perf_evsel__cpus(evsel)->map[id], csv_sep);
 832                 break;
 833         case AGGR_GLOBAL:
 834         default:
 835                 break;
 836         }
 837 }
 838
 839 static void nsec_printout(int id, int nr, struct perf_evsel *evsel, double avg)
 840 {
 841         double msecs = avg / 1e6;
 842         const char *fmt_v, *fmt_n;
 843         char name[25];
 844
 845         fmt_v = csv_output ? "%.6f%s" : "%18.6f%s";
 846         fmt_n = csv_output ? "%s" : "%-25s";
 847
 848         aggr_printout(evsel, id, nr);
 849
 850         scnprintf(name, sizeof(name), "%s%s",
 851                   perf_evsel__name(evsel), csv_output ? "" : " (msec)");
 852
 853         fprintf(output, fmt_v, msecs, csv_sep);
 854
 855         if (csv_output)
 856                 fprintf(output, "%s%s", evsel->unit, csv_sep);
 857         else
 858                 fprintf(output, "%-*s%s", unit_width, evsel->unit, csv_sep);
 859
 860         fprintf(output, fmt_n, name);
 861
 862         if (evsel->cgrp)
 863                 fprintf(output, "%s%s", csv_sep, evsel->cgrp->name);
 864
 865         if (csv_output || interval)
 866                 return;
 867
 868         if (perf_evsel__match(evsel, SOFTWARE, SW_TASK_CLOCK))
 869                 fprintf(output, " # %8.3f CPUs utilized          ",
 870                         avg / avg_stats(&walltime_nsecs_stats));
 871         else
 872                 fprintf(output, "                                   ");
 873 }
 874
 875 /* used for get_ratio_color() */
 876 enum grc_type {
 877         GRC_STALLED_CYCLES_FE,
 878         GRC_STALLED_CYCLES_BE,
 879         GRC_CACHE_MISSES,
 880         GRC_MAX_NR
 881 };
 882
 883 static const char *get_ratio_color(enum grc_type type, double ratio)
 884 {
 885         static const double grc_table[GRC_MAX_NR][3] = {
 886                 [GRC_STALLED_CYCLES_FE] = { 50.0, 30.0, 10.0 },
 887                 [GRC_STALLED_CYCLES_BE] = { 75.0, 50.0, 20.0 },
 888                 [GRC_CACHE_MISSES]      = { 20.0, 10.0, 5.0 },
 889         };
 890         const char *color = PERF_COLOR_NORMAL;
 891
 892         if (ratio > grc_table[type][0])
 893                 color = PERF_COLOR_RED;
 894         else if (ratio > grc_table[type][1])
 895                 color = PERF_COLOR_MAGENTA;
 896         else if (ratio > grc_table[type][2])
 897                 color = PERF_COLOR_YELLOW;
 898
 899         return color;
 900 }
 901
 902 static void print_stalled_cycles_frontend(FILE *out, int cpu,
 903                                           struct perf_evsel *evsel
 904                                           __maybe_unused, double avg)
 905 {
 906         double total, ratio = 0.0;
 907         const char *color;
 908         int ctx = evsel_context(evsel);
 909
 910         total = avg_stats(&runtime_cycles_stats[ctx][cpu]);
 911
 912         if (total)
 913                 ratio = avg / total * 100.0;
 914
 915         color = get_ratio_color(GRC_STALLED_CYCLES_FE, ratio);
 916
 917         fprintf(out, " #  ");
 918         color_fprintf(out, color, "%6.2f%%", ratio);
 919         fprintf(out, " frontend cycles idle   ");
 920 }
 921
 922 static void print_stalled_cycles_backend(FILE *out, int cpu,
 923                                          struct perf_evsel *evsel
 924                                          __maybe_unused, double avg)
 925 {
 926         double total, ratio = 0.0;
 927         const char *color;
 928         int ctx = evsel_context(evsel);
 929
 930         total = avg_stats(&runtime_cycles_stats[ctx][cpu]);
 931
 932         if (total)
 933                 ratio = avg / total * 100.0;
 934
 935         color = get_ratio_color(GRC_STALLED_CYCLES_BE, ratio);
 936
 937         fprintf(out, " #  ");
 938         color_fprintf(out, color, "%6.2f%%", ratio);
 939         fprintf(out, " backend  cycles idle   ");
 940 }
 941
 942 static void print_branch_misses(FILE *out, int cpu,
 943                                 struct perf_evsel *evsel __maybe_unused,
 944                                 double avg)
 945 {
 946         double total, ratio = 0.0;
 947         const char *color;
 948         int ctx = evsel_context(evsel);
 949
 950         total = avg_stats(&runtime_branches_stats[ctx][cpu]);
 951
 952         if (total)
 953                 ratio = avg / total * 100.0;
 954
 955         color = get_ratio_color(GRC_CACHE_MISSES, ratio);
 956
 957         fprintf(out, " #  ");
 958         color_fprintf(out, color, "%6.2f%%", ratio);
 959         fprintf(out, " of all branches        ");
 960 }
 961
 962 static void print_l1_dcache_misses(FILE *out, int cpu,
 963                                    struct perf_evsel *evsel __maybe_unused,
 964                                    double avg)
 965 {
 966         double total, ratio = 0.0;
 967         const char *color;
 968         int ctx = evsel_context(evsel);
 969
 970         total = avg_stats(&runtime_l1_dcache_stats[ctx][cpu]);
 971
 972         if (total)
 973                 ratio = avg / total * 100.0;
 974
 975         color = get_ratio_color(GRC_CACHE_MISSES, ratio);
 976
 977         fprintf(out, " #  ");
 978         color_fprintf(out, color, "%6.2f%%", ratio);
 979         fprintf(out, " of all L1-dcache hits  ");
 980 }
 981
 982 static void print_l1_icache_misses(FILE *out, int cpu,
 983                                    struct perf_evsel *evsel __maybe_unused,
 984                                    double avg)
 985 {
 986         double total, ratio = 0.0;
 987         const char *color;
 988         int ctx = evsel_context(evsel);
 989
 990         total = avg_stats(&runtime_l1_icache_stats[ctx][cpu]);
 991
 992         if (total)
 993                 ratio = avg / total * 100.0;
 994
 995         color = get_ratio_color(GRC_CACHE_MISSES, ratio);
 996
 997         fprintf(out, " #  ");
 998         color_fprintf(out, color, "%6.2f%%", ratio);
 999         fprintf(out, " of all L1-icache hits  ");
1000 }
1001
1002 static void print_dtlb_cache_misses(FILE *out, int cpu,
1003                                     struct perf_evsel *evsel __maybe_unused,
1004                                     double avg)
1005 {
1006         double total, ratio = 0.0;
1007         const char *color;
1008         int ctx = evsel_context(evsel);
1009
1010         total = avg_stats(&runtime_dtlb_cache_stats[ctx][cpu]);
1011
1012         if (total)
1013                 ratio = avg / total * 100.0;
1014
1015         color = get_ratio_color(GRC_CACHE_MISSES, ratio);
1016
1017         fprintf(out, " #  ");
1018         color_fprintf(out, color, "%6.2f%%", ratio);
1019         fprintf(out, " of all dTLB cache hits ");
1020 }
1021
1022 static void print_itlb_cache_misses(FILE *out, int cpu,
1023                                     struct perf_evsel *evsel __maybe_unused,
1024                                     double avg)
1025 {
1026         double total, ratio = 0.0;
1027         const char *color;
1028         int ctx = evsel_context(evsel);
1029
1030         total = avg_stats(&runtime_itlb_cache_stats[ctx][cpu]);
1031
1032         if (total)
1033                 ratio = avg / total * 100.0;
1034
1035         color = get_ratio_color(GRC_CACHE_MISSES, ratio);
1036
1037         fprintf(out, " #  ");
1038         color_fprintf(out, color, "%6.2f%%", ratio);
1039         fprintf(out, " of all iTLB cache hits ");
1040 }
1041
1042 static void print_ll_cache_misses(FILE *out, int cpu,
1043                                   struct perf_evsel *evsel __maybe_unused,
1044                                   double avg)
1045 {
1046         double total, ratio = 0.0;
1047         const char *color;
1048         int ctx = evsel_context(evsel);
1049
1050         total = avg_stats(&runtime_ll_cache_stats[ctx][cpu]);
1051
1052         if (total)
1053                 ratio = avg / total * 100.0;
1054
1055         color = get_ratio_color(GRC_CACHE_MISSES, ratio);
1056
1057         fprintf(out, " #  ");
1058         color_fprintf(out, color, "%6.2f%%", ratio);
1059         fprintf(out, " of all LL-cache hits   ");
1060 }
1061
1062 static void print_shadow_stats(FILE *out, struct perf_evsel *evsel, double avg, int cpu)
1063 {
1064         double total, ratio = 0.0, total2;
1065         int ctx = evsel_context(evsel);
1066
1067         if (perf_evsel__match(evsel, HARDWARE, HW_INSTRUCTIONS)) {
1068                 total = avg_stats(&runtime_cycles_stats[ctx][cpu]);
1069                 if (total) {
1070                         ratio = avg / total;
1071                         fprintf(out, " #   %5.2f  insns per cycle        ", ratio);
1072                 } else {
1073                         fprintf(out, "                                   ");
1074                 }
1075                 total = avg_stats(&runtime_stalled_cycles_front_stats[ctx][cpu]);
1076                 total = max(total, avg_stats(&runtime_stalled_cycles_back_stats[ctx][cpu]));
1077
1078                 if (total && avg) {
1079                         ratio = total / avg;
1080                         fprintf(out, "\n");
1081                         if (aggr_mode == AGGR_NONE)
1082                                 fprintf(out, "        ");
1083                         fprintf(out, "                                                  #   %5.2f  stalled cycles per insn", ratio);
1084                 }
1085
1086         } else if (perf_evsel__match(evsel, HARDWARE, HW_BRANCH_MISSES) &&
1087                         runtime_branches_stats[ctx][cpu].n != 0) {
1088                 print_branch_misses(out, cpu, evsel, avg);
1089         } else if (
1090                 evsel->attr.type == PERF_TYPE_HW_CACHE &&
1091                 evsel->attr.config ==  ( PERF_COUNT_HW_CACHE_L1D |
1092                                         ((PERF_COUNT_HW_CACHE_OP_READ) << 8) |
1093                                         ((PERF_COUNT_HW_CACHE_RESULT_MISS) << 16)) &&
1094                         runtime_l1_dcache_stats[ctx][cpu].n != 0) {
1095                 print_l1_dcache_misses(out, cpu, evsel, avg);
1096         } else if (
1097                 evsel->attr.type == PERF_TYPE_HW_CACHE &&
1098                 evsel->attr.config ==  ( PERF_COUNT_HW_CACHE_L1I |
1099                                         ((PERF_COUNT_HW_CACHE_OP_READ) << 8) |
1100                                         ((PERF_COUNT_HW_CACHE_RESULT_MISS) << 16)) &&
1101                         runtime_l1_icache_stats[ctx][cpu].n != 0) {
1102                 print_l1_icache_misses(out, cpu, evsel, avg);
1103         } else if (
1104                 evsel->attr.type == PERF_TYPE_HW_CACHE &&
1105                 evsel->attr.config ==  ( PERF_COUNT_HW_CACHE_DTLB |
1106                                         ((PERF_COUNT_HW_CACHE_OP_READ) << 8) |
1107                                         ((PERF_COUNT_HW_CACHE_RESULT_MISS) << 16)) &&
1108                         runtime_dtlb_cache_stats[ctx][cpu].n != 0) {
1109                 print_dtlb_cache_misses(out, cpu, evsel, avg);
1110         } else if (
1111                 evsel->attr.type == PERF_TYPE_HW_CACHE &&
1112                 evsel->attr.config ==  ( PERF_COUNT_HW_CACHE_ITLB |
1113                                         ((PERF_COUNT_HW_CACHE_OP_READ) << 8) |
1114                                         ((PERF_COUNT_HW_CACHE_RESULT_MISS) << 16)) &&
1115                         runtime_itlb_cache_stats[ctx][cpu].n != 0) {
1116                 print_itlb_cache_misses(out, cpu, evsel, avg);
1117         } else if (
1118                 evsel->attr.type == PERF_TYPE_HW_CACHE &&
1119                 evsel->attr.config ==  ( PERF_COUNT_HW_CACHE_LL |
1120                                         ((PERF_COUNT_HW_CACHE_OP_READ) << 8) |
1121                                         ((PERF_COUNT_HW_CACHE_RESULT_MISS) << 16)) &&
1122                         runtime_ll_cache_stats[ctx][cpu].n != 0) {
1123                 print_ll_cache_misses(out, cpu, evsel, avg);
1124         } else if (perf_evsel__match(evsel, HARDWARE, HW_CACHE_MISSES) &&
1125                         runtime_cacherefs_stats[ctx][cpu].n != 0) {
1126                 total = avg_stats(&runtime_cacherefs_stats[ctx][cpu]);
1127
1128                 if (total)
1129                         ratio = avg * 100 / total;
1130
1131                 fprintf(out, " # %8.3f %% of all cache refs    ", ratio);
1132
1133         } else if (perf_evsel__match(evsel, HARDWARE, HW_STALLED_CYCLES_FRONTEND)) {
1134                 print_stalled_cycles_frontend(out, cpu, evsel, avg);
1135         } else if (perf_evsel__match(evsel, HARDWARE, HW_STALLED_CYCLES_BACKEND)) {
1136                 print_stalled_cycles_backend(out, cpu, evsel, avg);
1137         } else if (perf_evsel__match(evsel, HARDWARE, HW_CPU_CYCLES)) {
1138                 total = avg_stats(&runtime_nsecs_stats[cpu]);
1139
1140                 if (total) {
1141                         ratio = avg / total;
1142                         fprintf(out, " # %8.3f GHz                    ", ratio);
1143                 } else {
1144                         fprintf(out, "                                   ");
1145                 }
1146         } else if (perf_stat_evsel__is(evsel, CYCLES_IN_TX)) {
1147                 total = avg_stats(&runtime_cycles_stats[ctx][cpu]);
1148                 if (total)
1149                         fprintf(out,
1150                                 " #   %5.2f%% transactional cycles   ",
1151                                 100.0 * (avg / total));
1152         } else if (perf_stat_evsel__is(evsel, CYCLES_IN_TX_CP)) {
1153                 total = avg_stats(&runtime_cycles_stats[ctx][cpu]);
1154                 total2 = avg_stats(&runtime_cycles_in_tx_stats[ctx][cpu]);
1155                 if (total2 < avg)
1156                         total2 = avg;
1157                 if (total)
1158                         fprintf(out,
1159                                 " #   %5.2f%% aborted cycles         ",
1160                                 100.0 * ((total2-avg) / total));
1161         } else if (perf_stat_evsel__is(evsel, TRANSACTION_START) &&
1162                    avg > 0 &&
1163                    runtime_cycles_in_tx_stats[ctx][cpu].n != 0) {
1164                 total = avg_stats(&runtime_cycles_in_tx_stats[ctx][cpu]);
1165
1166                 if (total)
1167                         ratio = total / avg;
1168
1169                 fprintf(out, " # %8.0f cycles / transaction   ", ratio);
1170         } else if (perf_stat_evsel__is(evsel, ELISION_START) &&
1171                    avg > 0 &&
1172                    runtime_cycles_in_tx_stats[ctx][cpu].n != 0) {
1173                 total = avg_stats(&runtime_cycles_in_tx_stats[ctx][cpu]);
1174
1175                 if (total)
1176                         ratio = total / avg;
1177
1178                 fprintf(out, " # %8.0f cycles / elision       ", ratio);
1179         } else if (runtime_nsecs_stats[cpu].n != 0) {
1180                 char unit = 'M';
1181
1182                 total = avg_stats(&runtime_nsecs_stats[cpu]);
1183
1184                 if (total)
1185                         ratio = 1000.0 * avg / total;
1186                 if (ratio < 0.001) {
1187                         ratio *= 1000;
1188                         unit = 'K';
1189                 }
1190
1191                 fprintf(out, " # %8.3f %c/sec                  ", ratio, unit);
1192         } else {
1193                 fprintf(out, "                                   ");
1194         }
1195 }
1196
1197 static void abs_printout(int id, int nr, struct perf_evsel *evsel, double avg)
1198 {
1199         double sc =  evsel->scale;
1200         const char *fmt;
1201         int cpu = cpu_map__id_to_cpu(id);
1202
1203         if (csv_output) {
1204                 fmt = sc != 1.0 ?  "%.2f%s" : "%.0f%s";
1205         } else {
1206                 if (big_num)
1207                         fmt = sc != 1.0 ? "%'18.2f%s" : "%'18.0f%s";
1208                 else
1209                         fmt = sc != 1.0 ? "%18.2f%s" : "%18.0f%s";
1210         }
1211
1212         aggr_printout(evsel, id, nr);
1213
1214         if (aggr_mode == AGGR_GLOBAL)
1215                 cpu = 0;
1216
1217         fprintf(output, fmt, avg, csv_sep);
1218
1219         if (evsel->unit)
1220                 fprintf(output, "%-*s%s",
1221                         csv_output ? 0 : unit_width,
1222                         evsel->unit, csv_sep);
1223
1224         fprintf(output, "%-*s", csv_output ? 0 : 25, perf_evsel__name(evsel));
1225
1226         if (evsel->cgrp)
1227                 fprintf(output, "%s%s", csv_sep, evsel->cgrp->name);
1228
1229         if (csv_output || interval)
1230                 return;
1231
1232         print_shadow_stats(output, evsel, avg, cpu);
1233 }
1234
1235 static void print_aggr(char *prefix)
1236 {
1237         struct perf_evsel *counter;
1238         int cpu, cpu2, s, s2, id, nr;
1239         double uval;
1240         u64 ena, run, val;
1241
1242         if (!(aggr_map || aggr_get_id))
1243                 return;
1244
1245         for (s = 0; s < aggr_map->nr; s++) {
1246                 id = aggr_map->map[s];
1247                 evlist__for_each(evsel_list, counter) {
1248                         val = ena = run = 0;
1249                         nr = 0;
1250                         for (cpu = 0; cpu < perf_evsel__nr_cpus(counter); cpu++) {
1251                                 cpu2 = perf_evsel__cpus(counter)->map[cpu];
1252                                 s2 = aggr_get_id(evsel_list->cpus, cpu2);
1253                                 if (s2 != id)
1254                                         continue;
1255                                 val += counter->counts->cpu[cpu].val;
1256                                 ena += counter->counts->cpu[cpu].ena;
1257                                 run += counter->counts->cpu[cpu].run;
1258                                 nr++;
1259                         }
1260                         if (prefix)
1261                                 fprintf(output, "%s", prefix);
1262
1263                         if (run == 0 || ena == 0) {
1264                                 aggr_printout(counter, id, nr);
1265
1266                                 fprintf(output, "%*s%s",
1267                                         csv_output ? 0 : 18,
1268                                         counter->supported ? CNTR_NOT_COUNTED : CNTR_NOT_SUPPORTED,
1269                                         csv_sep);
1270
1271                                 fprintf(output, "%-*s%s",
1272                                         csv_output ? 0 : unit_width,
1273                                         counter->unit, csv_sep);
1274
1275                                 fprintf(output, "%*s",
1276                                         csv_output ? 0 : -25,
1277                                         perf_evsel__name(counter));
1278
1279                                 if (counter->cgrp)
1280                                         fprintf(output, "%s%s",
1281                                                 csv_sep, counter->cgrp->name);
1282
1283                                 print_running(run, ena);
1284                                 fputc('\n', output);
1285                                 continue;
1286                         }
1287                         uval = val * counter->scale;
1288
1289                         if (nsec_counter(counter))
1290                                 nsec_printout(id, nr, counter, uval);
1291                         else
1292                                 abs_printout(id, nr, counter, uval);
1293
1294                         if (!csv_output)
1295                                 print_noise(counter, 1.0);
1296
1297                         print_running(run, ena);
1298                         fputc('\n', output);
1299                 }
1300         }
1301 }
1302
1303 /*
1304  * Print out the results of a single counter:
1305  * aggregated counts in system-wide mode
1306  */
1307 static void print_counter_aggr(struct perf_evsel *counter, char *prefix)
1308 {
1309         struct perf_stat *ps = counter->priv;
1310         double avg = avg_stats(&ps->res_stats[0]);
1311         int scaled = counter->counts->scaled;
1312         double uval;
1313         double avg_enabled, avg_running;
1314
1315         avg_enabled = avg_stats(&ps->res_stats[1]);
1316         avg_running = avg_stats(&ps->res_stats[2]);
1317
1318         if (prefix)
1319                 fprintf(output, "%s", prefix);
1320
1321         if (scaled == -1 || !counter->supported) {
1322                 fprintf(output, "%*s%s",
1323                         csv_output ? 0 : 18,
1324                         counter->supported ? CNTR_NOT_COUNTED : CNTR_NOT_SUPPORTED,
1325                         csv_sep);
1326                 fprintf(output, "%-*s%s",
1327                         csv_output ? 0 : unit_width,
1328                         counter->unit, csv_sep);
1329                 fprintf(output, "%*s",
1330                         csv_output ? 0 : -25,
1331                         perf_evsel__name(counter));
1332
1333                 if (counter->cgrp)
1334                         fprintf(output, "%s%s", csv_sep, counter->cgrp->name);
1335
1336                 print_running(avg_running, avg_enabled);
1337                 fputc('\n', output);
1338                 return;
1339         }
1340
1341         uval = avg * counter->scale;
1342
1343         if (nsec_counter(counter))
1344                 nsec_printout(-1, 0, counter, uval);
1345         else
1346                 abs_printout(-1, 0, counter, uval);
1347
1348         print_noise(counter, avg);
1349
1350         print_running(avg_running, avg_enabled);
1351         fprintf(output, "\n");
1352 }
1353
1354 /*
1355  * Print out the results of a single counter:
1356  * does not use aggregated count in system-wide
1357  */
1358 static void print_counter(struct perf_evsel *counter, char *prefix)
1359 {
1360         u64 ena, run, val;
1361         double uval;
1362         int cpu;
1363
1364         for (cpu = 0; cpu < perf_evsel__nr_cpus(counter); cpu++) {
1365                 val = counter->counts->cpu[cpu].val;
1366                 ena = counter->counts->cpu[cpu].ena;
1367                 run = counter->counts->cpu[cpu].run;
1368
1369                 if (prefix)
1370                         fprintf(output, "%s", prefix);
1371
1372                 if (run == 0 || ena == 0) {
1373                         fprintf(output, "CPU%*d%s%*s%s",
1374                                 csv_output ? 0 : -4,
1375                                 perf_evsel__cpus(counter)->map[cpu], csv_sep,
1376                                 csv_output ? 0 : 18,
1377                                 counter->supported ? CNTR_NOT_COUNTED : CNTR_NOT_SUPPORTED,
1378                                 csv_sep);
1379
1380                                 fprintf(output, "%-*s%s",
1381                                         csv_output ? 0 : unit_width,
1382                                         counter->unit, csv_sep);
1383
1384                                 fprintf(output, "%*s",
1385                                         csv_output ? 0 : -25,
1386                                         perf_evsel__name(counter));
1387
1388                         if (counter->cgrp)
1389                                 fprintf(output, "%s%s",
1390                                         csv_sep, counter->cgrp->name);
1391
1392                         print_running(run, ena);
1393                         fputc('\n', output);
1394                         continue;
1395                 }
1396
1397                 uval = val * counter->scale;
1398
1399                 if (nsec_counter(counter))
1400                         nsec_printout(cpu, 0, counter, uval);
1401                 else
1402                         abs_printout(cpu, 0, counter, uval);
1403
1404                 if (!csv_output)
1405                         print_noise(counter, 1.0);
1406                 print_running(run, ena);
1407
1408                 fputc('\n', output);
1409         }
1410 }
1411
1412 static void print_stat(int argc, const char **argv)
1413 {
1414         struct perf_evsel *counter;
1415         int i;
1416
1417         fflush(stdout);
1418
1419         if (!csv_output) {
1420                 fprintf(output, "\n");
1421                 fprintf(output, " Performance counter stats for ");
1422                 if (target.system_wide)
1423                         fprintf(output, "\'system wide");
1424                 else if (target.cpu_list)
1425                         fprintf(output, "\'CPU(s) %s", target.cpu_list);
1426                 else if (!target__has_task(&target)) {
1427                         fprintf(output, "\'%s", argv[0]);
1428                         for (i = 1; i < argc; i++)
1429                                 fprintf(output, " %s", argv[i]);
1430                 } else if (target.pid)
1431                         fprintf(output, "process id \'%s", target.pid);
1432                 else
1433                         fprintf(output, "thread id \'%s", target.tid);
1434
1435                 fprintf(output, "\'");
1436                 if (run_count > 1)
1437                         fprintf(output, " (%d runs)", run_count);
1438                 fprintf(output, ":\n\n");
1439         }
1440
1441         switch (aggr_mode) {
1442         case AGGR_CORE:
1443         case AGGR_SOCKET:
1444                 print_aggr(NULL);
1445                 break;
1446         case AGGR_GLOBAL:
1447                 evlist__for_each(evsel_list, counter)
1448                         print_counter_aggr(counter, NULL);
1449                 break;
1450         case AGGR_NONE:
1451                 evlist__for_each(evsel_list, counter)
1452                         print_counter(counter, NULL);
1453                 break;
1454         default:
1455                 break;
1456         }
1457
1458         if (!csv_output) {
1459                 if (!null_run)
1460                         fprintf(output, "\n");
1461                 fprintf(output, " %17.9f seconds time elapsed",
1462                                 avg_stats(&walltime_nsecs_stats)/1e9);
1463                 if (run_count > 1) {
1464                         fprintf(output, "                                        ");
1465                         print_noise_pct(stddev_stats(&walltime_nsecs_stats),
1466                                         avg_stats(&walltime_nsecs_stats));
1467                 }
1468                 fprintf(output, "\n\n");
1469         }
1470 }
1471
1472 static volatile int signr = -1;
1473
1474 static void skip_signal(int signo)
1475 {
1476         if ((child_pid == -1) || interval)
1477                 done = 1;
1478
1479         signr = signo;
1480         /*
1481          * render child_pid harmless
1482          * won't send SIGTERM to a random
1483          * process in case of race condition
1484          * and fast PID recycling
1485          */
1486         child_pid = -1;
1487 }
1488
1489 static void sig_atexit(void)
1490 {
1491         sigset_t set, oset;
1492
1493         /*
1494          * avoid race condition with SIGCHLD handler
1495          * in skip_signal() which is modifying child_pid
1496          * goal is to avoid send SIGTERM to a random
1497          * process
1498          */
1499         sigemptyset(&set);
1500         sigaddset(&set, SIGCHLD);
1501         sigprocmask(SIG_BLOCK, &set, &oset);
1502
1503         if (child_pid != -1)
1504                 kill(child_pid, SIGTERM);
1505
1506         sigprocmask(SIG_SETMASK, &oset, NULL);
1507
1508         if (signr == -1)
1509                 return;
1510
1511         signal(signr, SIG_DFL);
1512         kill(getpid(), signr);
1513 }
1514
1515 static int stat__set_big_num(const struct option *opt __maybe_unused,
1516                              const char *s __maybe_unused, int unset)
1517 {
1518         big_num_opt = unset ? 0 : 1;
1519         return 0;
1520 }
1521
1522 static int perf_stat_init_aggr_mode(void)
1523 {
1524         switch (aggr_mode) {
1525         case AGGR_SOCKET:
1526                 if (cpu_map__build_socket_map(evsel_list->cpus, &aggr_map)) {
1527                         perror("cannot build socket map");
1528                         return -1;
1529                 }
1530                 aggr_get_id = cpu_map__get_socket;
1531                 break;
1532         case AGGR_CORE:
1533                 if (cpu_map__build_core_map(evsel_list->cpus, &aggr_map)) {
1534                         perror("cannot build core map");
1535                         return -1;
1536                 }
1537                 aggr_get_id = cpu_map__get_core;
1538                 break;
1539         case AGGR_NONE:
1540         case AGGR_GLOBAL:
1541         default:
1542                 break;
1543         }
1544         return 0;
1545 }
1546
1547 /*
1548  * Add default attributes, if there were no attributes specified or
1549  * if -d/--detailed, -d -d or -d -d -d is used:
1550  */
1551 static int add_default_attributes(void)
1552 {
1553         struct perf_event_attr default_attrs[] = {
1554
1555   { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_TASK_CLOCK              },
1556   { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_CONTEXT_SWITCHES        },
1557   { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_CPU_MIGRATIONS          },
1558   { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_PAGE_FAULTS             },
1559
1560   { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_CPU_CYCLES              },
1561   { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_STALLED_CYCLES_FRONTEND },
1562   { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_STALLED_CYCLES_BACKEND  },
1563   { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_INSTRUCTIONS            },
1564   { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_BRANCH_INSTRUCTIONS     },
1565   { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_BRANCH_MISSES           },
1566
1567 };
1568
1569 /*
1570  * Detailed stats (-d), covering the L1 and last level data caches:
1571  */
1572         struct perf_event_attr detailed_attrs[] = {
1573
1574   { .type = PERF_TYPE_HW_CACHE,
1575     .config =
1576          PERF_COUNT_HW_CACHE_L1D                <<  0  |
1577         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
1578         (PERF_COUNT_HW_CACHE_RESULT_ACCESS      << 16)                          },
1579
1580   { .type = PERF_TYPE_HW_CACHE,
1581     .config =
1582          PERF_COUNT_HW_CACHE_L1D                <<  0  |
1583         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
1584         (PERF_COUNT_HW_CACHE_RESULT_MISS        << 16)                          },
1585
1586   { .type = PERF_TYPE_HW_CACHE,
1587     .config =
1588          PERF_COUNT_HW_CACHE_LL                 <<  0  |
1589         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
1590         (PERF_COUNT_HW_CACHE_RESULT_ACCESS      << 16)                          },
1591
1592   { .type = PERF_TYPE_HW_CACHE,
1593     .config =
1594          PERF_COUNT_HW_CACHE_LL                 <<  0  |
1595         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
1596         (PERF_COUNT_HW_CACHE_RESULT_MISS        << 16)                          },
1597 };
1598
1599 /*
1600  * Very detailed stats (-d -d), covering the instruction cache and the TLB caches:
1601  */
1602         struct perf_event_attr very_detailed_attrs[] = {
1603
1604   { .type = PERF_TYPE_HW_CACHE,
1605     .config =
1606          PERF_COUNT_HW_CACHE_L1I                <<  0  |
1607         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
1608         (PERF_COUNT_HW_CACHE_RESULT_ACCESS      << 16)                          },
1609
1610   { .type = PERF_TYPE_HW_CACHE,
1611     .config =
1612          PERF_COUNT_HW_CACHE_L1I                <<  0  |
1613         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
1614         (PERF_COUNT_HW_CACHE_RESULT_MISS        << 16)                          },
1615
1616   { .type = PERF_TYPE_HW_CACHE,
1617     .config =
1618          PERF_COUNT_HW_CACHE_DTLB               <<  0  |
1619         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
1620         (PERF_COUNT_HW_CACHE_RESULT_ACCESS      << 16)                          },
1621
1622   { .type = PERF_TYPE_HW_CACHE,
1623     .config =
1624          PERF_COUNT_HW_CACHE_DTLB               <<  0  |
1625         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
1626         (PERF_COUNT_HW_CACHE_RESULT_MISS        << 16)                          },
1627
1628   { .type = PERF_TYPE_HW_CACHE,
1629     .config =
1630          PERF_COUNT_HW_CACHE_ITLB               <<  0  |
1631         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
1632         (PERF_COUNT_HW_CACHE_RESULT_ACCESS      << 16)                          },
1633
1634   { .type = PERF_TYPE_HW_CACHE,
1635     .config =
1636          PERF_COUNT_HW_CACHE_ITLB               <<  0  |
1637         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
1638         (PERF_COUNT_HW_CACHE_RESULT_MISS        << 16)                          },
1639
1640 };
1641
1642 /*
1643  * Very, very detailed stats (-d -d -d), adding prefetch events:
1644  */
1645         struct perf_event_attr very_very_detailed_attrs[] = {
1646
1647   { .type = PERF_TYPE_HW_CACHE,
1648     .config =
1649          PERF_COUNT_HW_CACHE_L1D                <<  0  |
1650         (PERF_COUNT_HW_CACHE_OP_PREFETCH        <<  8) |
1651         (PERF_COUNT_HW_CACHE_RESULT_ACCESS      << 16)                          },
1652
1653   { .type = PERF_TYPE_HW_CACHE,
1654     .config =
1655          PERF_COUNT_HW_CACHE_L1D                <<  0  |
1656         (PERF_COUNT_HW_CACHE_OP_PREFETCH        <<  8) |
1657         (PERF_COUNT_HW_CACHE_RESULT_MISS        << 16)                          },
1658 };
1659
1660         /* Set attrs if no event is selected and !null_run: */
1661         if (null_run)
1662                 return 0;
1663
1664         if (transaction_run) {
1665                 int err;
1666                 if (pmu_have_event("cpu", "cycles-ct") &&
1667                     pmu_have_event("cpu", "el-start"))
1668                         err = parse_events(evsel_list, transaction_attrs, NULL);
1669                 else
1670                         err = parse_events(evsel_list, transaction_limited_attrs, NULL);
1671                 if (err) {
1672                         fprintf(stderr, "Cannot set up transaction events\n");
1673                         return -1;
1674                 }
1675                 return 0;
1676         }
1677
1678         if (!evsel_list->nr_entries) {
1679                 if (perf_evlist__add_default_attrs(evsel_list, default_attrs) < 0)
1680                         return -1;
1681         }
1682
1683         /* Detailed events get appended to the event list: */
1684
1685         if (detailed_run <  1)
1686                 return 0;
1687
1688         /* Append detailed run extra attributes: */
1689         if (perf_evlist__add_default_attrs(evsel_list, detailed_attrs) < 0)
1690                 return -1;
1691
1692         if (detailed_run < 2)
1693                 return 0;
1694
1695         /* Append very detailed run extra attributes: */
1696         if (perf_evlist__add_default_attrs(evsel_list, very_detailed_attrs) < 0)
1697                 return -1;
1698
1699         if (detailed_run < 3)
1700                 return 0;
1701
1702         /* Append very, very detailed run extra attributes: */
1703         return perf_evlist__add_default_attrs(evsel_list, very_very_detailed_attrs);
1704 }
1705
1706 int cmd_stat(int argc, const char **argv, const char *prefix __maybe_unused)
1707 {
1708         bool append_file = false;
1709         int output_fd = 0;
1710         const char *output_name = NULL;
1711         const struct option options[] = {
1712         OPT_BOOLEAN('T', "transaction", &transaction_run,
1713                     "hardware transaction statistics"),
1714         OPT_CALLBACK('e', "event", &evsel_list, "event",
1715                      "event selector. use 'perf list' to list available events",
1716                      parse_events_option),
1717         OPT_CALLBACK(0, "filter", &evsel_list, "filter",
1718                      "event filter", parse_filter),
1719         OPT_BOOLEAN('i', "no-inherit", &no_inherit,
1720                     "child tasks do not inherit counters"),
1721         OPT_STRING('p', "pid", &target.pid, "pid",
1722                    "stat events on existing process id"),
1723         OPT_STRING('t', "tid", &target.tid, "tid",
1724                    "stat events on existing thread id"),
1725         OPT_BOOLEAN('a', "all-cpus", &target.system_wide,
1726                     "system-wide collection from all CPUs"),
1727         OPT_BOOLEAN('g', "group", &group,
1728                     "put the counters into a counter group"),
1729         OPT_BOOLEAN('c', "scale", &scale, "scale/normalize counters"),
1730         OPT_INCR('v', "verbose", &verbose,
1731                     "be more verbose (show counter open errors, etc)"),
1732         OPT_INTEGER('r', "repeat", &run_count,
1733                     "repeat command and print average + stddev (max: 100, forever: 0)"),
1734         OPT_BOOLEAN('n', "null", &null_run,
1735                     "null run - dont start any counters"),
1736         OPT_INCR('d', "detailed", &detailed_run,
1737                     "detailed run - start a lot of events"),
1738         OPT_BOOLEAN('S', "sync", &sync_run,
1739                     "call sync() before starting a run"),
1740         OPT_CALLBACK_NOOPT('B', "big-num", NULL, NULL,
1741                            "print large numbers with thousands\' separators",
1742                            stat__set_big_num),
1743         OPT_STRING('C', "cpu", &target.cpu_list, "cpu",
1744                     "list of cpus to monitor in system-wide"),
1745         OPT_SET_UINT('A', "no-aggr", &aggr_mode,
1746                     "disable CPU count aggregation", AGGR_NONE),
1747         OPT_STRING('x', "field-separator", &csv_sep, "separator",
1748                    "print counts with custom separator"),
1749         OPT_CALLBACK('G', "cgroup", &evsel_list, "name",
1750                      "monitor event in cgroup name only", parse_cgroups),
1751         OPT_STRING('o', "output", &output_name, "file", "output file name"),
1752         OPT_BOOLEAN(0, "append", &append_file, "append to the output file"),
1753         OPT_INTEGER(0, "log-fd", &output_fd,
1754                     "log output to fd, instead of stderr"),
1755         OPT_STRING(0, "pre", &pre_cmd, "command",
1756                         "command to run prior to the measured command"),
1757         OPT_STRING(0, "post", &post_cmd, "command",
1758                         "command to run after to the measured command"),
1759         OPT_UINTEGER('I', "interval-print", &interval,
1760                     "print counts at regular interval in ms (>= 100)"),
1761         OPT_SET_UINT(0, "per-socket", &aggr_mode,
1762                      "aggregate counts per processor socket", AGGR_SOCKET),
1763         OPT_SET_UINT(0, "per-core", &aggr_mode,
1764                      "aggregate counts per physical processor core", AGGR_CORE),
1765         OPT_UINTEGER('D', "delay", &initial_delay,
1766                      "ms to wait before starting measurement after program start"),
1767         OPT_END()
1768         };
1769         const char * const stat_usage[] = {
1770                 "perf stat [<options>] [<command>]",
1771                 NULL
1772         };
1773         int status = -EINVAL, run_idx;
1774         const char *mode;
1775
1776         setlocale(LC_ALL, "");
1777
1778         evsel_list = perf_evlist__new();
1779         if (evsel_list == NULL)
1780                 return -ENOMEM;
1781
1782         argc = parse_options(argc, argv, options, stat_usage,
1783                 PARSE_OPT_STOP_AT_NON_OPTION);
1784
1785         output = stderr;
1786         if (output_name && strcmp(output_name, "-"))
1787                 output = NULL;
1788
1789         if (output_name && output_fd) {
1790                 fprintf(stderr, "cannot use both --output and --log-fd\n");
1791                 parse_options_usage(stat_usage, options, "o", 1);
1792                 parse_options_usage(NULL, options, "log-fd", 0);
1793                 goto out;
1794         }
1795
1796         if (output_fd < 0) {
1797                 fprintf(stderr, "argument to --log-fd must be a > 0\n");
1798                 parse_options_usage(stat_usage, options, "log-fd", 0);
1799                 goto out;
1800         }
1801
1802         if (!output) {
1803                 struct timespec tm;
1804                 mode = append_file ? "a" : "w";
1805
1806                 output = fopen(output_name, mode);
1807                 if (!output) {
1808                         perror("failed to create output file");
1809                         return -1;
1810                 }
1811                 clock_gettime(CLOCK_REALTIME, &tm);
1812                 fprintf(output, "# started on %s\n", ctime(&tm.tv_sec));
1813         } else if (output_fd > 0) {
1814                 mode = append_file ? "a" : "w";
1815                 output = fdopen(output_fd, mode);
1816                 if (!output) {
1817                         perror("Failed opening logfd");
1818                         return -errno;
1819                 }
1820         }
1821
1822         if (csv_sep) {
1823                 csv_output = true;
1824                 if (!strcmp(csv_sep, "\\t"))
1825                         csv_sep = "\t";
1826         } else
1827                 csv_sep = DEFAULT_SEPARATOR;
1828
1829         /*
1830          * let the spreadsheet do the pretty-printing
1831          */
1832         if (csv_output) {
1833                 /* User explicitly passed -B? */
1834                 if (big_num_opt == 1) {
1835                         fprintf(stderr, "-B option not supported with -x\n");
1836                         parse_options_usage(stat_usage, options, "B", 1);
1837                         parse_options_usage(NULL, options, "x", 1);
1838                         goto out;
1839                 } else /* Nope, so disable big number formatting */
1840                         big_num = false;
1841         } else if (big_num_opt == 0) /* User passed --no-big-num */
1842                 big_num = false;
1843
1844         if (!argc && target__none(&target))
1845                 usage_with_options(stat_usage, options);
1846
1847         if (run_count < 0) {
1848                 pr_err("Run count must be a positive number\n");
1849                 parse_options_usage(stat_usage, options, "r", 1);
1850                 goto out;
1851         } else if (run_count == 0) {
1852                 forever = true;
1853                 run_count = 1;
1854         }
1855
1856         /* no_aggr, cgroup are for system-wide only */
1857         if ((aggr_mode != AGGR_GLOBAL || nr_cgroups) &&
1858             !target__has_cpu(&target)) {
1859                 fprintf(stderr, "both cgroup and no-aggregation "
1860                         "modes only available in system-wide mode\n");
1861
1862                 parse_options_usage(stat_usage, options, "G", 1);
1863                 parse_options_usage(NULL, options, "A", 1);
1864                 parse_options_usage(NULL, options, "a", 1);
1865                 goto out;
1866         }
1867
1868         if (add_default_attributes())
1869                 goto out;
1870
1871         target__validate(&target);
1872
1873         if (perf_evlist__create_maps(evsel_list, &target) < 0) {
1874                 if (target__has_task(&target)) {
1875                         pr_err("Problems finding threads of monitor\n");
1876                         parse_options_usage(stat_usage, options, "p", 1);
1877                         parse_options_usage(NULL, options, "t", 1);
1878                 } else if (target__has_cpu(&target)) {
1879                         perror("failed to parse CPUs map");
1880                         parse_options_usage(stat_usage, options, "C", 1);
1881                         parse_options_usage(NULL, options, "a", 1);
1882                 }
1883                 goto out;
1884         }
1885         if (interval && interval < 100) {
1886                 pr_err("print interval must be >= 100ms\n");
1887                 parse_options_usage(stat_usage, options, "I", 1);
1888                 goto out;
1889         }
1890
1891         if (perf_evlist__alloc_stats(evsel_list, interval))
1892                 goto out;
1893
1894         if (perf_stat_init_aggr_mode())
1895                 goto out;
1896
1897         /*
1898          * We dont want to block the signals - that would cause
1899          * child tasks to inherit that and Ctrl-C would not work.
1900          * What we want is for Ctrl-C to work in the exec()-ed
1901          * task, but being ignored by perf stat itself:
1902          */
1903         atexit(sig_atexit);
1904         if (!forever)
1905                 signal(SIGINT,  skip_signal);
1906         signal(SIGCHLD, skip_signal);
1907         signal(SIGALRM, skip_signal);
1908         signal(SIGABRT, skip_signal);
1909
1910         status = 0;
1911         for (run_idx = 0; forever || run_idx < run_count; run_idx++) {
1912                 if (run_count != 1 && verbose)
1913                         fprintf(output, "[ perf stat: executing run #%d ... ]\n",
1914                                 run_idx + 1);
1915
1916                 status = run_perf_stat(argc, argv);
1917                 if (forever && status != -1) {
1918                         print_stat(argc, argv);
1919                         perf_stat__reset_stats(evsel_list);
1920                 }
1921         }
1922
1923         if (!forever && status != -1 && !interval)
1924                 print_stat(argc, argv);
1925
1926         perf_evlist__free_stats(evsel_list);
1927 out:
1928         perf_evlist__delete(evsel_list);
1929         return status;
1930 }