tools/perf/builtin-stat.c

   1 /*
   2  * builtin-stat.c
   3  *
   4  * Builtin stat command: Give a precise performance counters summary
   5  * overview about any workload, CPU or specific PID.
   6  *
   7  * Sample output:
   8
   9    $ perf stat ./hackbench 10
  10
  11   Time: 0.118
  12
  13   Performance counter stats for './hackbench 10':
  14
  15        1708.761321 task-clock                #   11.037 CPUs utilized
  16             41,190 context-switches          #    0.024 M/sec
  17              6,735 CPU-migrations            #    0.004 M/sec
  18             17,318 page-faults               #    0.010 M/sec
  19      5,205,202,243 cycles                    #    3.046 GHz
  20      3,856,436,920 stalled-cycles-frontend   #   74.09% frontend cycles idle
  21      1,600,790,871 stalled-cycles-backend    #   30.75% backend  cycles idle
  22      2,603,501,247 instructions              #    0.50  insns per cycle
  23                                              #    1.48  stalled cycles per insn
  24        484,357,498 branches                  #  283.455 M/sec
  25          6,388,934 branch-misses             #    1.32% of all branches
  26
  27         0.154822978  seconds time elapsed
  28
  29  *
  30  * Copyright (C) 2008-2011, Red Hat Inc, Ingo Molnar <mingo@redhat.com>
  31  *
  32  * Improvements and fixes by:
  33  *
  34  *   Arjan van de Ven <arjan@linux.intel.com>
  35  *   Yanmin Zhang <yanmin.zhang@intel.com>
  36  *   Wu Fengguang <fengguang.wu@intel.com>
  37  *   Mike Galbraith <efault@gmx.de>
  38  *   Paul Mackerras <paulus@samba.org>
  39  *   Jaswinder Singh Rajput <jaswinder@kernel.org>
  40  *
  41  * Released under the GPL v2. (and only v2, not any later version)
  42  */
  43
  44 #include "perf.h"
  45 #include "builtin.h"
  46 #include "util/util.h"
  47 #include "util/parse-options.h"
  48 #include "util/parse-events.h"
  49 #include "util/event.h"
  50 #include "util/evlist.h"
  51 #include "util/evsel.h"
  52 #include "util/debug.h"
  53 #include "util/color.h"
  54 #include "util/header.h"
  55 #include "util/cpumap.h"
  56 #include "util/thread.h"
  57 #include "util/thread_map.h"
  58
  59 #include <sys/prctl.h>
  60 #include <math.h>
  61 #include <locale.h>
  62
  63 #define DEFAULT_SEPARATOR       " "
  64 #define CNTR_NOT_SUPPORTED      "<not supported>"
  65 #define CNTR_NOT_COUNTED        "<not counted>"
  66
  67 static struct perf_event_attr default_attrs[] = {
  68
  69   { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_TASK_CLOCK              },
  70   { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_CONTEXT_SWITCHES        },
  71   { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_CPU_MIGRATIONS          },
  72   { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_PAGE_FAULTS             },
  73
  74   { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_CPU_CYCLES              },
  75   { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_STALLED_CYCLES_FRONTEND },
  76   { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_STALLED_CYCLES_BACKEND  },
  77   { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_INSTRUCTIONS            },
  78   { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_BRANCH_INSTRUCTIONS     },
  79   { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_BRANCH_MISSES           },
  80
  81 };
  82
  83 /*
  84  * Detailed stats (-d), covering the L1 and last level data caches:
  85  */
  86 static struct perf_event_attr detailed_attrs[] = {
  87
  88   { .type = PERF_TYPE_HW_CACHE,
  89     .config =
  90          PERF_COUNT_HW_CACHE_L1D                <<  0  |
  91         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
  92         (PERF_COUNT_HW_CACHE_RESULT_ACCESS      << 16)                          },
  93
  94   { .type = PERF_TYPE_HW_CACHE,
  95     .config =
  96          PERF_COUNT_HW_CACHE_L1D                <<  0  |
  97         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
  98         (PERF_COUNT_HW_CACHE_RESULT_MISS        << 16)                          },
  99
 100   { .type = PERF_TYPE_HW_CACHE,
 101     .config =
 102          PERF_COUNT_HW_CACHE_LL                 <<  0  |
 103         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
 104         (PERF_COUNT_HW_CACHE_RESULT_ACCESS      << 16)                          },
 105
 106   { .type = PERF_TYPE_HW_CACHE,
 107     .config =
 108          PERF_COUNT_HW_CACHE_LL                 <<  0  |
 109         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
 110         (PERF_COUNT_HW_CACHE_RESULT_MISS        << 16)                          },
 111 };
 112
 113 /*
 114  * Very detailed stats (-d -d), covering the instruction cache and the TLB caches:
 115  */
 116 static struct perf_event_attr very_detailed_attrs[] = {
 117
 118   { .type = PERF_TYPE_HW_CACHE,
 119     .config =
 120          PERF_COUNT_HW_CACHE_L1I                <<  0  |
 121         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
 122         (PERF_COUNT_HW_CACHE_RESULT_ACCESS      << 16)                          },
 123
 124   { .type = PERF_TYPE_HW_CACHE,
 125     .config =
 126          PERF_COUNT_HW_CACHE_L1I                <<  0  |
 127         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
 128         (PERF_COUNT_HW_CACHE_RESULT_MISS        << 16)                          },
 129
 130   { .type = PERF_TYPE_HW_CACHE,
 131     .config =
 132          PERF_COUNT_HW_CACHE_DTLB               <<  0  |
 133         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
 134         (PERF_COUNT_HW_CACHE_RESULT_ACCESS      << 16)                          },
 135
 136   { .type = PERF_TYPE_HW_CACHE,
 137     .config =
 138          PERF_COUNT_HW_CACHE_DTLB               <<  0  |
 139         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
 140         (PERF_COUNT_HW_CACHE_RESULT_MISS        << 16)                          },
 141
 142   { .type = PERF_TYPE_HW_CACHE,
 143     .config =
 144          PERF_COUNT_HW_CACHE_ITLB               <<  0  |
 145         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
 146         (PERF_COUNT_HW_CACHE_RESULT_ACCESS      << 16)                          },
 147
 148   { .type = PERF_TYPE_HW_CACHE,
 149     .config =
 150          PERF_COUNT_HW_CACHE_ITLB               <<  0  |
 151         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
 152         (PERF_COUNT_HW_CACHE_RESULT_MISS        << 16)                          },
 153
 154 };
 155
 156 /*
 157  * Very, very detailed stats (-d -d -d), adding prefetch events:
 158  */
 159 static struct perf_event_attr very_very_detailed_attrs[] = {
 160
 161   { .type = PERF_TYPE_HW_CACHE,
 162     .config =
 163          PERF_COUNT_HW_CACHE_L1D                <<  0  |
 164         (PERF_COUNT_HW_CACHE_OP_PREFETCH        <<  8) |
 165         (PERF_COUNT_HW_CACHE_RESULT_ACCESS      << 16)                          },
 166
 167   { .type = PERF_TYPE_HW_CACHE,
 168     .config =
 169          PERF_COUNT_HW_CACHE_L1D                <<  0  |
 170         (PERF_COUNT_HW_CACHE_OP_PREFETCH        <<  8) |
 171         (PERF_COUNT_HW_CACHE_RESULT_MISS        << 16)                          },
 172 };
 173
 174
 175
 176 struct perf_evlist              *evsel_list;
 177
 178 static bool                     system_wide                     =  false;
 179 static int                      run_idx                         =  0;
 180
 181 static int                      run_count                       =  1;
 182 static bool                     no_inherit                      = false;
 183 static bool                     scale                           =  true;
 184 static bool                     no_aggr                         = false;
 185 static pid_t                    target_pid                      = -1;
 186 static pid_t                    target_tid                      = -1;
 187 static pid_t                    child_pid                       = -1;
 188 static bool                     null_run                        =  false;
 189 static int                      detailed_run                    =  0;
 190 static bool                     sync_run                        =  false;
 191 static bool                     big_num                         =  true;
 192 static int                      big_num_opt                     =  -1;
 193 static const char               *cpu_list;
 194 static const char               *csv_sep                        = NULL;
 195 static bool                     csv_output                      = false;
 196 static bool                     group                           = false;
 197 static const char               *output_name                    = NULL;
 198 static FILE                     *output                         = NULL;
 199 static int                      output_fd;
 200
 201 static volatile int done = 0;
 202
 203 struct stats
 204 {
 205         double n, mean, M2;
 206 };
 207
 208 struct perf_stat {
 209         struct stats      res_stats[3];
 210 };
 211
 212 static int perf_evsel__alloc_stat_priv(struct perf_evsel *evsel)
 213 {
 214         evsel->priv = zalloc(sizeof(struct perf_stat));
 215         return evsel->priv == NULL ? -ENOMEM : 0;
 216 }
 217
 218 static void perf_evsel__free_stat_priv(struct perf_evsel *evsel)
 219 {
 220         free(evsel->priv);
 221         evsel->priv = NULL;
 222 }
 223
 224 static void update_stats(struct stats *stats, u64 val)
 225 {
 226         double delta;
 227
 228         stats->n++;
 229         delta = val - stats->mean;
 230         stats->mean += delta / stats->n;
 231         stats->M2 += delta*(val - stats->mean);
 232 }
 233
 234 static double avg_stats(struct stats *stats)
 235 {
 236         return stats->mean;
 237 }
 238
 239 /*
 240  * http://en.wikipedia.org/wiki/Algorithms_for_calculating_variance
 241  *
 242  *       (\Sum n_i^2) - ((\Sum n_i)^2)/n
 243  * s^2 = -------------------------------
 244  *                  n - 1
 245  *
 246  * http://en.wikipedia.org/wiki/Stddev
 247  *
 248  * The std dev of the mean is related to the std dev by:
 249  *
 250  *             s
 251  * s_mean = -------
 252  *          sqrt(n)
 253  *
 254  */
 255 static double stddev_stats(struct stats *stats)
 256 {
 257         double variance, variance_mean;
 258
 259         if (!stats->n)
 260                 return 0.0;
 261
 262         variance = stats->M2 / (stats->n - 1);
 263         variance_mean = variance / stats->n;
 264
 265         return sqrt(variance_mean);
 266 }
 267
 268 struct stats                    runtime_nsecs_stats[MAX_NR_CPUS];
 269 struct stats                    runtime_cycles_stats[MAX_NR_CPUS];
 270 struct stats                    runtime_stalled_cycles_front_stats[MAX_NR_CPUS];
 271 struct stats                    runtime_stalled_cycles_back_stats[MAX_NR_CPUS];
 272 struct stats                    runtime_branches_stats[MAX_NR_CPUS];
 273 struct stats                    runtime_cacherefs_stats[MAX_NR_CPUS];
 274 struct stats                    runtime_l1_dcache_stats[MAX_NR_CPUS];
 275 struct stats                    runtime_l1_icache_stats[MAX_NR_CPUS];
 276 struct stats                    runtime_ll_cache_stats[MAX_NR_CPUS];
 277 struct stats                    runtime_itlb_cache_stats[MAX_NR_CPUS];
 278 struct stats                    runtime_dtlb_cache_stats[MAX_NR_CPUS];
 279 struct stats                    walltime_nsecs_stats;
 280
 281 static int create_perf_stat_counter(struct perf_evsel *evsel,
 282                                     struct perf_evsel *first)
 283 {
 284         struct perf_event_attr *attr = &evsel->attr;
 285         struct xyarray *group_fd = NULL;
 286
 287         if (group && evsel != first)
 288                 group_fd = first->fd;
 289
 290         if (scale)
 291                 attr->read_format = PERF_FORMAT_TOTAL_TIME_ENABLED |
 292                                     PERF_FORMAT_TOTAL_TIME_RUNNING;
 293
 294         attr->inherit = !no_inherit;
 295
 296         if (system_wide)
 297                 return perf_evsel__open_per_cpu(evsel, evsel_list->cpus,
 298                                                 group, group_fd);
 299         if (target_pid == -1 && target_tid == -1) {
 300                 attr->disabled = 1;
 301                 attr->enable_on_exec = 1;
 302         }
 303
 304         return perf_evsel__open_per_thread(evsel, evsel_list->threads,
 305                                            group, group_fd);
 306 }
 307
 308 /*
 309  * Does the counter have nsecs as a unit?
 310  */
 311 static inline int nsec_counter(struct perf_evsel *evsel)
 312 {
 313         if (perf_evsel__match(evsel, SOFTWARE, SW_CPU_CLOCK) ||
 314             perf_evsel__match(evsel, SOFTWARE, SW_TASK_CLOCK))
 315                 return 1;
 316
 317         return 0;
 318 }
 319
 320 /*
 321  * Update various tracking values we maintain to print
 322  * more semantic information such as miss/hit ratios,
 323  * instruction rates, etc:
 324  */
 325 static void update_shadow_stats(struct perf_evsel *counter, u64 *count)
 326 {
 327         if (perf_evsel__match(counter, SOFTWARE, SW_TASK_CLOCK))
 328                 update_stats(&runtime_nsecs_stats[0], count[0]);
 329         else if (perf_evsel__match(counter, HARDWARE, HW_CPU_CYCLES))
 330                 update_stats(&runtime_cycles_stats[0], count[0]);
 331         else if (perf_evsel__match(counter, HARDWARE, HW_STALLED_CYCLES_FRONTEND))
 332                 update_stats(&runtime_stalled_cycles_front_stats[0], count[0]);
 333         else if (perf_evsel__match(counter, HARDWARE, HW_STALLED_CYCLES_BACKEND))
 334                 update_stats(&runtime_stalled_cycles_back_stats[0], count[0]);
 335         else if (perf_evsel__match(counter, HARDWARE, HW_BRANCH_INSTRUCTIONS))
 336                 update_stats(&runtime_branches_stats[0], count[0]);
 337         else if (perf_evsel__match(counter, HARDWARE, HW_CACHE_REFERENCES))
 338                 update_stats(&runtime_cacherefs_stats[0], count[0]);
 339         else if (perf_evsel__match(counter, HW_CACHE, HW_CACHE_L1D))
 340                 update_stats(&runtime_l1_dcache_stats[0], count[0]);
 341         else if (perf_evsel__match(counter, HW_CACHE, HW_CACHE_L1I))
 342                 update_stats(&runtime_l1_icache_stats[0], count[0]);
 343         else if (perf_evsel__match(counter, HW_CACHE, HW_CACHE_LL))
 344                 update_stats(&runtime_ll_cache_stats[0], count[0]);
 345         else if (perf_evsel__match(counter, HW_CACHE, HW_CACHE_DTLB))
 346                 update_stats(&runtime_dtlb_cache_stats[0], count[0]);
 347         else if (perf_evsel__match(counter, HW_CACHE, HW_CACHE_ITLB))
 348                 update_stats(&runtime_itlb_cache_stats[0], count[0]);
 349 }
 350
 351 /*
 352  * Read out the results of a single counter:
 353  * aggregate counts across CPUs in system-wide mode
 354  */
 355 static int read_counter_aggr(struct perf_evsel *counter)
 356 {
 357         struct perf_stat *ps = counter->priv;
 358         u64 *count = counter->counts->aggr.values;
 359         int i;
 360
 361         if (__perf_evsel__read(counter, evsel_list->cpus->nr,
 362                                evsel_list->threads->nr, scale) < 0)
 363                 return -1;
 364
 365         for (i = 0; i < 3; i++)
 366                 update_stats(&ps->res_stats[i], count[i]);
 367
 368         if (verbose) {
 369                 fprintf(output, "%s: %" PRIu64 " %" PRIu64 " %" PRIu64 "\n",
 370                         event_name(counter), count[0], count[1], count[2]);
 371         }
 372
 373         /*
 374          * Save the full runtime - to allow normalization during printout:
 375          */
 376         update_shadow_stats(counter, count);
 377
 378         return 0;
 379 }
 380
 381 /*
 382  * Read out the results of a single counter:
 383  * do not aggregate counts across CPUs in system-wide mode
 384  */
 385 static int read_counter(struct perf_evsel *counter)
 386 {
 387         u64 *count;
 388         int cpu;
 389
 390         for (cpu = 0; cpu < evsel_list->cpus->nr; cpu++) {
 391                 if (__perf_evsel__read_on_cpu(counter, cpu, 0, scale) < 0)
 392                         return -1;
 393
 394                 count = counter->counts->cpu[cpu].values;
 395
 396                 update_shadow_stats(counter, count);
 397         }
 398
 399         return 0;
 400 }
 401
 402 static int run_perf_stat(int argc __used, const char **argv)
 403 {
 404         unsigned long long t0, t1;
 405         struct perf_evsel *counter, *first;
 406         int status = 0;
 407         int child_ready_pipe[2], go_pipe[2];
 408         const bool forks = (argc > 0);
 409         char buf;
 410
 411         if (forks && (pipe(child_ready_pipe) < 0 || pipe(go_pipe) < 0)) {
 412                 perror("failed to create pipes");
 413                 exit(1);
 414         }
 415
 416         if (forks) {
 417                 if ((child_pid = fork()) < 0)
 418                         perror("failed to fork");
 419
 420                 if (!child_pid) {
 421                         close(child_ready_pipe[0]);
 422                         close(go_pipe[1]);
 423                         fcntl(go_pipe[0], F_SETFD, FD_CLOEXEC);
 424
 425                         /*
 426                          * Do a dummy execvp to get the PLT entry resolved,
 427                          * so we avoid the resolver overhead on the real
 428                          * execvp call.
 429                          */
 430                         execvp("", (char **)argv);
 431
 432                         /*
 433                          * Tell the parent we're ready to go
 434                          */
 435                         close(child_ready_pipe[1]);
 436
 437                         /*
 438                          * Wait until the parent tells us to go.
 439                          */
 440                         if (read(go_pipe[0], &buf, 1) == -1)
 441                                 perror("unable to read pipe");
 442
 443                         execvp(argv[0], (char **)argv);
 444
 445                         perror(argv[0]);
 446                         exit(-1);
 447                 }
 448
 449                 if (target_tid == -1 && target_pid == -1 && !system_wide)
 450                         evsel_list->threads->map[0] = child_pid;
 451
 452                 /*
 453                  * Wait for the child to be ready to exec.
 454                  */
 455                 close(child_ready_pipe[1]);
 456                 close(go_pipe[0]);
 457                 if (read(child_ready_pipe[0], &buf, 1) == -1)
 458                         perror("unable to read pipe");
 459                 close(child_ready_pipe[0]);
 460         }
 461
 462         first = list_entry(evsel_list->entries.next, struct perf_evsel, node);
 463
 464         list_for_each_entry(counter, &evsel_list->entries, node) {
 465                 if (create_perf_stat_counter(counter, first) < 0) {
 466                         if (errno == EINVAL || errno == ENOSYS ||
 467                             errno == ENOENT || errno == EOPNOTSUPP) {
 468                                 if (verbose)
 469                                         ui__warning("%s event is not supported by the kernel.\n",
 470                                                     event_name(counter));
 471                                 counter->supported = false;
 472                                 continue;
 473                         }
 474
 475                         if (errno == EPERM || errno == EACCES) {
 476                                 error("You may not have permission to collect %sstats.\n"
 477                                       "\t Consider tweaking"
 478                                       " /proc/sys/kernel/perf_event_paranoid or running as root.",
 479                                       system_wide ? "system-wide " : "");
 480                         } else {
 481                                 error("open_counter returned with %d (%s). "
 482                                       "/bin/dmesg may provide additional information.\n",
 483                                        errno, strerror(errno));
 484                         }
 485                         if (child_pid != -1)
 486                                 kill(child_pid, SIGTERM);
 487                         die("Not all events could be opened.\n");
 488                         return -1;
 489                 }
 490                 counter->supported = true;
 491         }
 492
 493         if (perf_evlist__set_filters(evsel_list)) {
 494                 error("failed to set filter with %d (%s)\n", errno,
 495                         strerror(errno));
 496                 return -1;
 497         }
 498
 499         /*
 500          * Enable counters and exec the command:
 501          */
 502         t0 = rdclock();
 503
 504         if (forks) {
 505                 close(go_pipe[1]);
 506                 wait(&status);
 507                 if (WIFSIGNALED(status))
 508                         psignal(WTERMSIG(status), argv[0]);
 509         } else {
 510                 while(!done) sleep(1);
 511         }
 512
 513         t1 = rdclock();
 514
 515         update_stats(&walltime_nsecs_stats, t1 - t0);
 516
 517         if (no_aggr) {
 518                 list_for_each_entry(counter, &evsel_list->entries, node) {
 519                         read_counter(counter);
 520                         perf_evsel__close_fd(counter, evsel_list->cpus->nr, 1);
 521                 }
 522         } else {
 523                 list_for_each_entry(counter, &evsel_list->entries, node) {
 524                         read_counter_aggr(counter);
 525                         perf_evsel__close_fd(counter, evsel_list->cpus->nr,
 526                                              evsel_list->threads->nr);
 527                 }
 528         }
 529
 530         return WEXITSTATUS(status);
 531 }
 532
 533 static void print_noise_pct(double total, double avg)
 534 {
 535         double pct = 0.0;
 536
 537         if (avg)
 538                 pct = 100.0*total/avg;
 539
 540         if (csv_output)
 541                 fprintf(output, "%s%.2f%%", csv_sep, pct);
 542         else if (pct)
 543                 fprintf(output, "  ( +-%6.2f%% )", pct);
 544 }
 545
 546 static void print_noise(struct perf_evsel *evsel, double avg)
 547 {
 548         struct perf_stat *ps;
 549
 550         if (run_count == 1)
 551                 return;
 552
 553         ps = evsel->priv;
 554         print_noise_pct(stddev_stats(&ps->res_stats[0]), avg);
 555 }
 556
 557 static void nsec_printout(int cpu, struct perf_evsel *evsel, double avg)
 558 {
 559         double msecs = avg / 1e6;
 560         char cpustr[16] = { '\0', };
 561         const char *fmt = csv_output ? "%s%.6f%s%s" : "%s%18.6f%s%-25s";
 562
 563         if (no_aggr)
 564                 sprintf(cpustr, "CPU%*d%s",
 565                         csv_output ? 0 : -4,
 566                         evsel_list->cpus->map[cpu], csv_sep);
 567
 568         fprintf(output, fmt, cpustr, msecs, csv_sep, event_name(evsel));
 569
 570         if (evsel->cgrp)
 571                 fprintf(output, "%s%s", csv_sep, evsel->cgrp->name);
 572
 573         if (csv_output)
 574                 return;
 575
 576         if (perf_evsel__match(evsel, SOFTWARE, SW_TASK_CLOCK))
 577                 fprintf(output, " # %8.3f CPUs utilized          ",
 578                         avg / avg_stats(&walltime_nsecs_stats));
 579 }
 580
 581 static void print_stalled_cycles_frontend(int cpu, struct perf_evsel *evsel __used, double avg)
 582 {
 583         double total, ratio = 0.0;
 584         const char *color;
 585
 586         total = avg_stats(&runtime_cycles_stats[cpu]);
 587
 588         if (total)
 589                 ratio = avg / total * 100.0;
 590
 591         color = PERF_COLOR_NORMAL;
 592         if (ratio > 50.0)
 593                 color = PERF_COLOR_RED;
 594         else if (ratio > 30.0)
 595                 color = PERF_COLOR_MAGENTA;
 596         else if (ratio > 10.0)
 597                 color = PERF_COLOR_YELLOW;
 598
 599         fprintf(output, " #  ");
 600         color_fprintf(output, color, "%6.2f%%", ratio);
 601         fprintf(output, " frontend cycles idle   ");
 602 }
 603
 604 static void print_stalled_cycles_backend(int cpu, struct perf_evsel *evsel __used, double avg)
 605 {
 606         double total, ratio = 0.0;
 607         const char *color;
 608
 609         total = avg_stats(&runtime_cycles_stats[cpu]);
 610
 611         if (total)
 612                 ratio = avg / total * 100.0;
 613
 614         color = PERF_COLOR_NORMAL;
 615         if (ratio > 75.0)
 616                 color = PERF_COLOR_RED;
 617         else if (ratio > 50.0)
 618                 color = PERF_COLOR_MAGENTA;
 619         else if (ratio > 20.0)
 620                 color = PERF_COLOR_YELLOW;
 621
 622         fprintf(output, " #  ");
 623         color_fprintf(output, color, "%6.2f%%", ratio);
 624         fprintf(output, " backend  cycles idle   ");
 625 }
 626
 627 static void print_branch_misses(int cpu, struct perf_evsel *evsel __used, double avg)
 628 {
 629         double total, ratio = 0.0;
 630         const char *color;
 631
 632         total = avg_stats(&runtime_branches_stats[cpu]);
 633
 634         if (total)
 635                 ratio = avg / total * 100.0;
 636
 637         color = PERF_COLOR_NORMAL;
 638         if (ratio > 20.0)
 639                 color = PERF_COLOR_RED;
 640         else if (ratio > 10.0)
 641                 color = PERF_COLOR_MAGENTA;
 642         else if (ratio > 5.0)
 643                 color = PERF_COLOR_YELLOW;
 644
 645         fprintf(output, " #  ");
 646         color_fprintf(output, color, "%6.2f%%", ratio);
 647         fprintf(output, " of all branches        ");
 648 }
 649
 650 static void print_l1_dcache_misses(int cpu, struct perf_evsel *evsel __used, double avg)
 651 {
 652         double total, ratio = 0.0;
 653         const char *color;
 654
 655         total = avg_stats(&runtime_l1_dcache_stats[cpu]);
 656
 657         if (total)
 658                 ratio = avg / total * 100.0;
 659
 660         color = PERF_COLOR_NORMAL;
 661         if (ratio > 20.0)
 662                 color = PERF_COLOR_RED;
 663         else if (ratio > 10.0)
 664                 color = PERF_COLOR_MAGENTA;
 665         else if (ratio > 5.0)
 666                 color = PERF_COLOR_YELLOW;
 667
 668         fprintf(output, " #  ");
 669         color_fprintf(output, color, "%6.2f%%", ratio);
 670         fprintf(output, " of all L1-dcache hits  ");
 671 }
 672
 673 static void print_l1_icache_misses(int cpu, struct perf_evsel *evsel __used, double avg)
 674 {
 675         double total, ratio = 0.0;
 676         const char *color;
 677
 678         total = avg_stats(&runtime_l1_icache_stats[cpu]);
 679
 680         if (total)
 681                 ratio = avg / total * 100.0;
 682
 683         color = PERF_COLOR_NORMAL;
 684         if (ratio > 20.0)
 685                 color = PERF_COLOR_RED;
 686         else if (ratio > 10.0)
 687                 color = PERF_COLOR_MAGENTA;
 688         else if (ratio > 5.0)
 689                 color = PERF_COLOR_YELLOW;
 690
 691         fprintf(output, " #  ");
 692         color_fprintf(output, color, "%6.2f%%", ratio);
 693         fprintf(output, " of all L1-icache hits  ");
 694 }
 695
 696 static void print_dtlb_cache_misses(int cpu, struct perf_evsel *evsel __used, double avg)
 697 {
 698         double total, ratio = 0.0;
 699         const char *color;
 700
 701         total = avg_stats(&runtime_dtlb_cache_stats[cpu]);
 702
 703         if (total)
 704                 ratio = avg / total * 100.0;
 705
 706         color = PERF_COLOR_NORMAL;
 707         if (ratio > 20.0)
 708                 color = PERF_COLOR_RED;
 709         else if (ratio > 10.0)
 710                 color = PERF_COLOR_MAGENTA;
 711         else if (ratio > 5.0)
 712                 color = PERF_COLOR_YELLOW;
 713
 714         fprintf(output, " #  ");
 715         color_fprintf(output, color, "%6.2f%%", ratio);
 716         fprintf(output, " of all dTLB cache hits ");
 717 }
 718
 719 static void print_itlb_cache_misses(int cpu, struct perf_evsel *evsel __used, double avg)
 720 {
 721         double total, ratio = 0.0;
 722         const char *color;
 723
 724         total = avg_stats(&runtime_itlb_cache_stats[cpu]);
 725
 726         if (total)
 727                 ratio = avg / total * 100.0;
 728
 729         color = PERF_COLOR_NORMAL;
 730         if (ratio > 20.0)
 731                 color = PERF_COLOR_RED;
 732         else if (ratio > 10.0)
 733                 color = PERF_COLOR_MAGENTA;
 734         else if (ratio > 5.0)
 735                 color = PERF_COLOR_YELLOW;
 736
 737         fprintf(output, " #  ");
 738         color_fprintf(output, color, "%6.2f%%", ratio);
 739         fprintf(output, " of all iTLB cache hits ");
 740 }
 741
 742 static void print_ll_cache_misses(int cpu, struct perf_evsel *evsel __used, double avg)
 743 {
 744         double total, ratio = 0.0;
 745         const char *color;
 746
 747         total = avg_stats(&runtime_ll_cache_stats[cpu]);
 748
 749         if (total)
 750                 ratio = avg / total * 100.0;
 751
 752         color = PERF_COLOR_NORMAL;
 753         if (ratio > 20.0)
 754                 color = PERF_COLOR_RED;
 755         else if (ratio > 10.0)
 756                 color = PERF_COLOR_MAGENTA;
 757         else if (ratio > 5.0)
 758                 color = PERF_COLOR_YELLOW;
 759
 760         fprintf(output, " #  ");
 761         color_fprintf(output, color, "%6.2f%%", ratio);
 762         fprintf(output, " of all LL-cache hits   ");
 763 }
 764
 765 static void abs_printout(int cpu, struct perf_evsel *evsel, double avg)
 766 {
 767         double total, ratio = 0.0;
 768         char cpustr[16] = { '\0', };
 769         const char *fmt;
 770
 771         if (csv_output)
 772                 fmt = "%s%.0f%s%s";
 773         else if (big_num)
 774                 fmt = "%s%'18.0f%s%-25s";
 775         else
 776                 fmt = "%s%18.0f%s%-25s";
 777
 778         if (no_aggr)
 779                 sprintf(cpustr, "CPU%*d%s",
 780                         csv_output ? 0 : -4,
 781                         evsel_list->cpus->map[cpu], csv_sep);
 782         else
 783                 cpu = 0;
 784
 785         fprintf(output, fmt, cpustr, avg, csv_sep, event_name(evsel));
 786
 787         if (evsel->cgrp)
 788                 fprintf(output, "%s%s", csv_sep, evsel->cgrp->name);
 789
 790         if (csv_output)
 791                 return;
 792
 793         if (perf_evsel__match(evsel, HARDWARE, HW_INSTRUCTIONS)) {
 794                 total = avg_stats(&runtime_cycles_stats[cpu]);
 795
 796                 if (total)
 797                         ratio = avg / total;
 798
 799                 fprintf(output, " #   %5.2f  insns per cycle        ", ratio);
 800
 801                 total = avg_stats(&runtime_stalled_cycles_front_stats[cpu]);
 802                 total = max(total, avg_stats(&runtime_stalled_cycles_back_stats[cpu]));
 803
 804                 if (total && avg) {
 805                         ratio = total / avg;
 806                         fprintf(output, "\n                                             #   %5.2f  stalled cycles per insn", ratio);
 807                 }
 808
 809         } else if (perf_evsel__match(evsel, HARDWARE, HW_BRANCH_MISSES) &&
 810                         runtime_branches_stats[cpu].n != 0) {
 811                 print_branch_misses(cpu, evsel, avg);
 812         } else if (
 813                 evsel->attr.type == PERF_TYPE_HW_CACHE &&
 814                 evsel->attr.config ==  ( PERF_COUNT_HW_CACHE_L1D |
 815                                         ((PERF_COUNT_HW_CACHE_OP_READ) << 8) |
 816                                         ((PERF_COUNT_HW_CACHE_RESULT_MISS) << 16)) &&
 817                         runtime_l1_dcache_stats[cpu].n != 0) {
 818                 print_l1_dcache_misses(cpu, evsel, avg);
 819         } else if (
 820                 evsel->attr.type == PERF_TYPE_HW_CACHE &&
 821                 evsel->attr.config ==  ( PERF_COUNT_HW_CACHE_L1I |
 822                                         ((PERF_COUNT_HW_CACHE_OP_READ) << 8) |
 823                                         ((PERF_COUNT_HW_CACHE_RESULT_MISS) << 16)) &&
 824                         runtime_l1_icache_stats[cpu].n != 0) {
 825                 print_l1_icache_misses(cpu, evsel, avg);
 826         } else if (
 827                 evsel->attr.type == PERF_TYPE_HW_CACHE &&
 828                 evsel->attr.config ==  ( PERF_COUNT_HW_CACHE_DTLB |
 829                                         ((PERF_COUNT_HW_CACHE_OP_READ) << 8) |
 830                                         ((PERF_COUNT_HW_CACHE_RESULT_MISS) << 16)) &&
 831                         runtime_dtlb_cache_stats[cpu].n != 0) {
 832                 print_dtlb_cache_misses(cpu, evsel, avg);
 833         } else if (
 834                 evsel->attr.type == PERF_TYPE_HW_CACHE &&
 835                 evsel->attr.config ==  ( PERF_COUNT_HW_CACHE_ITLB |
 836                                         ((PERF_COUNT_HW_CACHE_OP_READ) << 8) |
 837                                         ((PERF_COUNT_HW_CACHE_RESULT_MISS) << 16)) &&
 838                         runtime_itlb_cache_stats[cpu].n != 0) {
 839                 print_itlb_cache_misses(cpu, evsel, avg);
 840         } else if (
 841                 evsel->attr.type == PERF_TYPE_HW_CACHE &&
 842                 evsel->attr.config ==  ( PERF_COUNT_HW_CACHE_LL |
 843                                         ((PERF_COUNT_HW_CACHE_OP_READ) << 8) |
 844                                         ((PERF_COUNT_HW_CACHE_RESULT_MISS) << 16)) &&
 845                         runtime_ll_cache_stats[cpu].n != 0) {
 846                 print_ll_cache_misses(cpu, evsel, avg);
 847         } else if (perf_evsel__match(evsel, HARDWARE, HW_CACHE_MISSES) &&
 848                         runtime_cacherefs_stats[cpu].n != 0) {
 849                 total = avg_stats(&runtime_cacherefs_stats[cpu]);
 850
 851                 if (total)
 852                         ratio = avg * 100 / total;
 853
 854                 fprintf(output, " # %8.3f %% of all cache refs    ", ratio);
 855
 856         } else if (perf_evsel__match(evsel, HARDWARE, HW_STALLED_CYCLES_FRONTEND)) {
 857                 print_stalled_cycles_frontend(cpu, evsel, avg);
 858         } else if (perf_evsel__match(evsel, HARDWARE, HW_STALLED_CYCLES_BACKEND)) {
 859                 print_stalled_cycles_backend(cpu, evsel, avg);
 860         } else if (perf_evsel__match(evsel, HARDWARE, HW_CPU_CYCLES)) {
 861                 total = avg_stats(&runtime_nsecs_stats[cpu]);
 862
 863                 if (total)
 864                         ratio = 1.0 * avg / total;
 865
 866                 fprintf(output, " # %8.3f GHz                    ", ratio);
 867         } else if (runtime_nsecs_stats[cpu].n != 0) {
 868                 total = avg_stats(&runtime_nsecs_stats[cpu]);
 869
 870                 if (total)
 871                         ratio = 1000.0 * avg / total;
 872
 873                 fprintf(output, " # %8.3f M/sec                  ", ratio);
 874         } else {
 875                 fprintf(output, "                                   ");
 876         }
 877 }
 878
 879 /*
 880  * Print out the results of a single counter:
 881  * aggregated counts in system-wide mode
 882  */
 883 static void print_counter_aggr(struct perf_evsel *counter)
 884 {
 885         struct perf_stat *ps = counter->priv;
 886         double avg = avg_stats(&ps->res_stats[0]);
 887         int scaled = counter->counts->scaled;
 888
 889         if (scaled == -1) {
 890                 fprintf(output, "%*s%s%*s",
 891                         csv_output ? 0 : 18,
 892                         counter->supported ? CNTR_NOT_COUNTED : CNTR_NOT_SUPPORTED,
 893                         csv_sep,
 894                         csv_output ? 0 : -24,
 895                         event_name(counter));
 896
 897                 if (counter->cgrp)
 898                         fprintf(output, "%s%s", csv_sep, counter->cgrp->name);
 899
 900                 fputc('\n', output);
 901                 return;
 902         }
 903
 904         if (nsec_counter(counter))
 905                 nsec_printout(-1, counter, avg);
 906         else
 907                 abs_printout(-1, counter, avg);
 908
 909         print_noise(counter, avg);
 910
 911         if (csv_output) {
 912                 fputc('\n', output);
 913                 return;
 914         }
 915
 916         if (scaled) {
 917                 double avg_enabled, avg_running;
 918
 919                 avg_enabled = avg_stats(&ps->res_stats[1]);
 920                 avg_running = avg_stats(&ps->res_stats[2]);
 921
 922                 fprintf(output, " [%5.2f%%]", 100 * avg_running / avg_enabled);
 923         }
 924         fprintf(output, "\n");
 925 }
 926
 927 /*
 928  * Print out the results of a single counter:
 929  * does not use aggregated count in system-wide
 930  */
 931 static void print_counter(struct perf_evsel *counter)
 932 {
 933         u64 ena, run, val;
 934         int cpu;
 935
 936         for (cpu = 0; cpu < evsel_list->cpus->nr; cpu++) {
 937                 val = counter->counts->cpu[cpu].val;
 938                 ena = counter->counts->cpu[cpu].ena;
 939                 run = counter->counts->cpu[cpu].run;
 940                 if (run == 0 || ena == 0) {
 941                         fprintf(output, "CPU%*d%s%*s%s%*s",
 942                                 csv_output ? 0 : -4,
 943                                 evsel_list->cpus->map[cpu], csv_sep,
 944                                 csv_output ? 0 : 18,
 945                                 counter->supported ? CNTR_NOT_COUNTED : CNTR_NOT_SUPPORTED,
 946                                 csv_sep,
 947                                 csv_output ? 0 : -24,
 948                                 event_name(counter));
 949
 950                         if (counter->cgrp)
 951                                 fprintf(output, "%s%s",
 952                                         csv_sep, counter->cgrp->name);
 953
 954                         fputc('\n', output);
 955                         continue;
 956                 }
 957
 958                 if (nsec_counter(counter))
 959                         nsec_printout(cpu, counter, val);
 960                 else
 961                         abs_printout(cpu, counter, val);
 962
 963                 if (!csv_output) {
 964                         print_noise(counter, 1.0);
 965
 966                         if (run != ena)
 967                                 fprintf(output, "  (%.2f%%)",
 968                                         100.0 * run / ena);
 969                 }
 970                 fputc('\n', output);
 971         }
 972 }
 973
 974 static void print_stat(int argc, const char **argv)
 975 {
 976         struct perf_evsel *counter;
 977         int i;
 978
 979         fflush(stdout);
 980
 981         if (!csv_output) {
 982                 fprintf(output, "\n");
 983                 fprintf(output, " Performance counter stats for ");
 984                 if(target_pid == -1 && target_tid == -1) {
 985                         fprintf(output, "\'%s", argv[0]);
 986                         for (i = 1; i < argc; i++)
 987                                 fprintf(output, " %s", argv[i]);
 988                 } else if (target_pid != -1)
 989                         fprintf(output, "process id \'%d", target_pid);
 990                 else
 991                         fprintf(output, "thread id \'%d", target_tid);
 992
 993                 fprintf(output, "\'");
 994                 if (run_count > 1)
 995                         fprintf(output, " (%d runs)", run_count);
 996                 fprintf(output, ":\n\n");
 997         }
 998
 999         if (no_aggr) {
1000                 list_for_each_entry(counter, &evsel_list->entries, node)
1001                         print_counter(counter);
1002         } else {
1003                 list_for_each_entry(counter, &evsel_list->entries, node)
1004                         print_counter_aggr(counter);
1005         }
1006
1007         if (!csv_output) {
1008                 if (!null_run)
1009                         fprintf(output, "\n");
1010                 fprintf(output, " %17.9f seconds time elapsed",
1011                                 avg_stats(&walltime_nsecs_stats)/1e9);
1012                 if (run_count > 1) {
1013                         fprintf(output, "                                        ");
1014                         print_noise_pct(stddev_stats(&walltime_nsecs_stats),
1015                                         avg_stats(&walltime_nsecs_stats));
1016                 }
1017                 fprintf(output, "\n\n");
1018         }
1019 }
1020
1021 static volatile int signr = -1;
1022
1023 static void skip_signal(int signo)
1024 {
1025         if(child_pid == -1)
1026                 done = 1;
1027
1028         signr = signo;
1029 }
1030
1031 static void sig_atexit(void)
1032 {
1033         if (child_pid != -1)
1034                 kill(child_pid, SIGTERM);
1035
1036         if (signr == -1)
1037                 return;
1038
1039         signal(signr, SIG_DFL);
1040         kill(getpid(), signr);
1041 }
1042
1043 static const char * const stat_usage[] = {
1044         "perf stat [<options>] [<command>]",
1045         NULL
1046 };
1047
1048 static int stat__set_big_num(const struct option *opt __used,
1049                              const char *s __used, int unset)
1050 {
1051         big_num_opt = unset ? 0 : 1;
1052         return 0;
1053 }
1054
1055 static bool append_file;
1056
1057 static const struct option options[] = {
1058         OPT_CALLBACK('e', "event", &evsel_list, "event",
1059                      "event selector. use 'perf list' to list available events",
1060                      parse_events_option),
1061         OPT_CALLBACK(0, "filter", &evsel_list, "filter",
1062                      "event filter", parse_filter),
1063         OPT_BOOLEAN('i', "no-inherit", &no_inherit,
1064                     "child tasks do not inherit counters"),
1065         OPT_INTEGER('p', "pid", &target_pid,
1066                     "stat events on existing process id"),
1067         OPT_INTEGER('t', "tid", &target_tid,
1068                     "stat events on existing thread id"),
1069         OPT_BOOLEAN('a', "all-cpus", &system_wide,
1070                     "system-wide collection from all CPUs"),
1071         OPT_BOOLEAN('g', "group", &group,
1072                     "put the counters into a counter group"),
1073         OPT_BOOLEAN('c', "scale", &scale,
1074                     "scale/normalize counters"),
1075         OPT_INCR('v', "verbose", &verbose,
1076                     "be more verbose (show counter open errors, etc)"),
1077         OPT_INTEGER('r', "repeat", &run_count,
1078                     "repeat command and print average + stddev (max: 100)"),
1079         OPT_BOOLEAN('n', "null", &null_run,
1080                     "null run - dont start any counters"),
1081         OPT_INCR('d', "detailed", &detailed_run,
1082                     "detailed run - start a lot of events"),
1083         OPT_BOOLEAN('S', "sync", &sync_run,
1084                     "call sync() before starting a run"),
1085         OPT_CALLBACK_NOOPT('B', "big-num", NULL, NULL,
1086                            "print large numbers with thousands\' separators",
1087                            stat__set_big_num),
1088         OPT_STRING('C', "cpu", &cpu_list, "cpu",
1089                     "list of cpus to monitor in system-wide"),
1090         OPT_BOOLEAN('A', "no-aggr", &no_aggr,
1091                     "disable CPU count aggregation"),
1092         OPT_STRING('x', "field-separator", &csv_sep, "separator",
1093                    "print counts with custom separator"),
1094         OPT_CALLBACK('G', "cgroup", &evsel_list, "name",
1095                      "monitor event in cgroup name only",
1096                      parse_cgroups),
1097         OPT_STRING('o', "output", &output_name, "file",
1098                     "output file name"),
1099         OPT_BOOLEAN(0, "append", &append_file, "append to the output file"),
1100         OPT_INTEGER(0, "log-fd", &output_fd,
1101                     "log output to fd, instead of stderr"),
1102         OPT_END()
1103 };
1104
1105 /*
1106  * Add default attributes, if there were no attributes specified or
1107  * if -d/--detailed, -d -d or -d -d -d is used:
1108  */
1109 static int add_default_attributes(void)
1110 {
1111         struct perf_evsel *pos;
1112         size_t attr_nr = 0;
1113         size_t c;
1114
1115         /* Set attrs if no event is selected and !null_run: */
1116         if (null_run)
1117                 return 0;
1118
1119         if (!evsel_list->nr_entries) {
1120                 for (c = 0; c < ARRAY_SIZE(default_attrs); c++) {
1121                         pos = perf_evsel__new(default_attrs + c, c + attr_nr);
1122                         if (pos == NULL)
1123                                 return -1;
1124                         perf_evlist__add(evsel_list, pos);
1125                 }
1126                 attr_nr += c;
1127         }
1128
1129         /* Detailed events get appended to the event list: */
1130
1131         if (detailed_run <  1)
1132                 return 0;
1133
1134         /* Append detailed run extra attributes: */
1135         for (c = 0; c < ARRAY_SIZE(detailed_attrs); c++) {
1136                 pos = perf_evsel__new(detailed_attrs + c, c + attr_nr);
1137                 if (pos == NULL)
1138                         return -1;
1139                 perf_evlist__add(evsel_list, pos);
1140         }
1141         attr_nr += c;
1142
1143         if (detailed_run < 2)
1144                 return 0;
1145
1146         /* Append very detailed run extra attributes: */
1147         for (c = 0; c < ARRAY_SIZE(very_detailed_attrs); c++) {
1148                 pos = perf_evsel__new(very_detailed_attrs + c, c + attr_nr);
1149                 if (pos == NULL)
1150                         return -1;
1151                 perf_evlist__add(evsel_list, pos);
1152         }
1153
1154         if (detailed_run < 3)
1155                 return 0;
1156
1157         /* Append very, very detailed run extra attributes: */
1158         for (c = 0; c < ARRAY_SIZE(very_very_detailed_attrs); c++) {
1159                 pos = perf_evsel__new(very_very_detailed_attrs + c, c + attr_nr);
1160                 if (pos == NULL)
1161                         return -1;
1162                 perf_evlist__add(evsel_list, pos);
1163         }
1164
1165
1166         return 0;
1167 }
1168
1169 int cmd_stat(int argc, const char **argv, const char *prefix __used)
1170 {
1171         struct perf_evsel *pos;
1172         int status = -ENOMEM;
1173         const char *mode;
1174
1175         setlocale(LC_ALL, "");
1176
1177         evsel_list = perf_evlist__new(NULL, NULL);
1178         if (evsel_list == NULL)
1179                 return -ENOMEM;
1180
1181         argc = parse_options(argc, argv, options, stat_usage,
1182                 PARSE_OPT_STOP_AT_NON_OPTION);
1183
1184         output = stderr;
1185         if (output_name && strcmp(output_name, "-"))
1186                 output = NULL;
1187
1188         if (output_name && output_fd) {
1189                 fprintf(stderr, "cannot use both --output and --log-fd\n");
1190                 usage_with_options(stat_usage, options);
1191         }
1192         if (!output) {
1193                 struct timespec tm;
1194                 mode = append_file ? "a" : "w";
1195
1196                 output = fopen(output_name, mode);
1197                 if (!output) {
1198                         perror("failed to create output file");
1199                         exit(-1);
1200                 }
1201                 clock_gettime(CLOCK_REALTIME, &tm);
1202                 fprintf(output, "# started on %s\n", ctime(&tm.tv_sec));
1203         } else if (output_fd != 2) {
1204                 mode = append_file ? "a" : "w";
1205                 output = fdopen(output_fd, mode);
1206                 if (!output) {
1207                         perror("Failed opening logfd");
1208                         return -errno;
1209                 }
1210         }
1211
1212         if (csv_sep) {
1213                 csv_output = true;
1214                 if (!strcmp(csv_sep, "\\t"))
1215                         csv_sep = "\t";
1216         } else
1217                 csv_sep = DEFAULT_SEPARATOR;
1218
1219         /*
1220          * let the spreadsheet do the pretty-printing
1221          */
1222         if (csv_output) {
1223                 /* User explicitly passed -B? */
1224                 if (big_num_opt == 1) {
1225                         fprintf(stderr, "-B option not supported with -x\n");
1226                         usage_with_options(stat_usage, options);
1227                 } else /* Nope, so disable big number formatting */
1228                         big_num = false;
1229         } else if (big_num_opt == 0) /* User passed --no-big-num */
1230                 big_num = false;
1231
1232         if (!argc && target_pid == -1 && target_tid == -1)
1233                 usage_with_options(stat_usage, options);
1234         if (run_count <= 0)
1235                 usage_with_options(stat_usage, options);
1236
1237         /* no_aggr, cgroup are for system-wide only */
1238         if ((no_aggr || nr_cgroups) && !system_wide) {
1239                 fprintf(stderr, "both cgroup and no-aggregation "
1240                         "modes only available in system-wide mode\n");
1241
1242                 usage_with_options(stat_usage, options);
1243         }
1244
1245         if (add_default_attributes())
1246                 goto out;
1247
1248         if (target_pid != -1)
1249                 target_tid = target_pid;
1250
1251         evsel_list->threads = thread_map__new(target_pid, target_tid);
1252         if (evsel_list->threads == NULL) {
1253                 pr_err("Problems finding threads of monitor\n");
1254                 usage_with_options(stat_usage, options);
1255         }
1256
1257         if (system_wide)
1258                 evsel_list->cpus = cpu_map__new(cpu_list);
1259         else
1260                 evsel_list->cpus = cpu_map__dummy_new();
1261
1262         if (evsel_list->cpus == NULL) {
1263                 perror("failed to parse CPUs map");
1264                 usage_with_options(stat_usage, options);
1265                 return -1;
1266         }
1267
1268         list_for_each_entry(pos, &evsel_list->entries, node) {
1269                 if (perf_evsel__alloc_stat_priv(pos) < 0 ||
1270                     perf_evsel__alloc_counts(pos, evsel_list->cpus->nr) < 0 ||
1271                     perf_evsel__alloc_fd(pos, evsel_list->cpus->nr, evsel_list->threads->nr) < 0)
1272                         goto out_free_fd;
1273         }
1274
1275         /*
1276          * We dont want to block the signals - that would cause
1277          * child tasks to inherit that and Ctrl-C would not work.
1278          * What we want is for Ctrl-C to work in the exec()-ed
1279          * task, but being ignored by perf stat itself:
1280          */
1281         atexit(sig_atexit);
1282         signal(SIGINT,  skip_signal);
1283         signal(SIGALRM, skip_signal);
1284         signal(SIGABRT, skip_signal);
1285
1286         status = 0;
1287         for (run_idx = 0; run_idx < run_count; run_idx++) {
1288                 if (run_count != 1 && verbose)
1289                         fprintf(output, "[ perf stat: executing run #%d ... ]\n",
1290                                 run_idx + 1);
1291
1292                 if (sync_run)
1293                         sync();
1294
1295                 status = run_perf_stat(argc, argv);
1296         }
1297
1298         if (status != -1)
1299                 print_stat(argc, argv);
1300 out_free_fd:
1301         list_for_each_entry(pos, &evsel_list->entries, node)
1302                 perf_evsel__free_stat_priv(pos);
1303         perf_evlist__delete_maps(evsel_list);
1304 out:
1305         perf_evlist__delete(evsel_list);
1306         return status;
1307 }