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 || errno == ENOENT) {
 467                                 if (verbose)
 468                                         ui__warning("%s event is not supported by the kernel.\n",
 469                                                     event_name(counter));
 470                                 counter->supported = false;
 471                                 continue;
 472                         }
 473
 474                         if (errno == EPERM || errno == EACCES) {
 475                                 error("You may not have permission to collect %sstats.\n"
 476                                       "\t Consider tweaking"
 477                                       " /proc/sys/kernel/perf_event_paranoid or running as root.",
 478                                       system_wide ? "system-wide " : "");
 479                         } else {
 480                                 error("open_counter returned with %d (%s). "
 481                                       "/bin/dmesg may provide additional information.\n",
 482                                        errno, strerror(errno));
 483                         }
 484                         if (child_pid != -1)
 485                                 kill(child_pid, SIGTERM);
 486                         die("Not all events could be opened.\n");
 487                         return -1;
 488                 }
 489                 counter->supported = true;
 490         }
 491
 492         if (perf_evlist__set_filters(evsel_list)) {
 493                 error("failed to set filter with %d (%s)\n", errno,
 494                         strerror(errno));
 495                 return -1;
 496         }
 497
 498         /*
 499          * Enable counters and exec the command:
 500          */
 501         t0 = rdclock();
 502
 503         if (forks) {
 504                 close(go_pipe[1]);
 505                 wait(&status);
 506                 if (WIFSIGNALED(status))
 507                         psignal(WTERMSIG(status), argv[0]);
 508         } else {
 509                 while(!done) sleep(1);
 510         }
 511
 512         t1 = rdclock();
 513
 514         update_stats(&walltime_nsecs_stats, t1 - t0);
 515
 516         if (no_aggr) {
 517                 list_for_each_entry(counter, &evsel_list->entries, node) {
 518                         read_counter(counter);
 519                         perf_evsel__close_fd(counter, evsel_list->cpus->nr, 1);
 520                 }
 521         } else {
 522                 list_for_each_entry(counter, &evsel_list->entries, node) {
 523                         read_counter_aggr(counter);
 524                         perf_evsel__close_fd(counter, evsel_list->cpus->nr,
 525                                              evsel_list->threads->nr);
 526                 }
 527         }
 528
 529         return WEXITSTATUS(status);
 530 }
 531
 532 static void print_noise_pct(double total, double avg)
 533 {
 534         double pct = 0.0;
 535
 536         if (avg)
 537                 pct = 100.0*total/avg;
 538
 539         if (csv_output)
 540                 fprintf(output, "%s%.2f%%", csv_sep, pct);
 541         else if (pct)
 542                 fprintf(output, "  ( +-%6.2f%% )", pct);
 543 }
 544
 545 static void print_noise(struct perf_evsel *evsel, double avg)
 546 {
 547         struct perf_stat *ps;
 548
 549         if (run_count == 1)
 550                 return;
 551
 552         ps = evsel->priv;
 553         print_noise_pct(stddev_stats(&ps->res_stats[0]), avg);
 554 }
 555
 556 static void nsec_printout(int cpu, struct perf_evsel *evsel, double avg)
 557 {
 558         double msecs = avg / 1e6;
 559         char cpustr[16] = { '\0', };
 560         const char *fmt = csv_output ? "%s%.6f%s%s" : "%s%18.6f%s%-25s";
 561
 562         if (no_aggr)
 563                 sprintf(cpustr, "CPU%*d%s",
 564                         csv_output ? 0 : -4,
 565                         evsel_list->cpus->map[cpu], csv_sep);
 566
 567         fprintf(output, fmt, cpustr, msecs, csv_sep, event_name(evsel));
 568
 569         if (evsel->cgrp)
 570                 fprintf(output, "%s%s", csv_sep, evsel->cgrp->name);
 571
 572         if (csv_output)
 573                 return;
 574
 575         if (perf_evsel__match(evsel, SOFTWARE, SW_TASK_CLOCK))
 576                 fprintf(output, " # %8.3f CPUs utilized          ",
 577                         avg / avg_stats(&walltime_nsecs_stats));
 578 }
 579
 580 static void print_stalled_cycles_frontend(int cpu, struct perf_evsel *evsel __used, double avg)
 581 {
 582         double total, ratio = 0.0;
 583         const char *color;
 584
 585         total = avg_stats(&runtime_cycles_stats[cpu]);
 586
 587         if (total)
 588                 ratio = avg / total * 100.0;
 589
 590         color = PERF_COLOR_NORMAL;
 591         if (ratio > 50.0)
 592                 color = PERF_COLOR_RED;
 593         else if (ratio > 30.0)
 594                 color = PERF_COLOR_MAGENTA;
 595         else if (ratio > 10.0)
 596                 color = PERF_COLOR_YELLOW;
 597
 598         fprintf(output, " #  ");
 599         color_fprintf(output, color, "%6.2f%%", ratio);
 600         fprintf(output, " frontend cycles idle   ");
 601 }
 602
 603 static void print_stalled_cycles_backend(int cpu, struct perf_evsel *evsel __used, double avg)
 604 {
 605         double total, ratio = 0.0;
 606         const char *color;
 607
 608         total = avg_stats(&runtime_cycles_stats[cpu]);
 609
 610         if (total)
 611                 ratio = avg / total * 100.0;
 612
 613         color = PERF_COLOR_NORMAL;
 614         if (ratio > 75.0)
 615                 color = PERF_COLOR_RED;
 616         else if (ratio > 50.0)
 617                 color = PERF_COLOR_MAGENTA;
 618         else if (ratio > 20.0)
 619                 color = PERF_COLOR_YELLOW;
 620
 621         fprintf(output, " #  ");
 622         color_fprintf(output, color, "%6.2f%%", ratio);
 623         fprintf(output, " backend  cycles idle   ");
 624 }
 625
 626 static void print_branch_misses(int cpu, struct perf_evsel *evsel __used, double avg)
 627 {
 628         double total, ratio = 0.0;
 629         const char *color;
 630
 631         total = avg_stats(&runtime_branches_stats[cpu]);
 632
 633         if (total)
 634                 ratio = avg / total * 100.0;
 635
 636         color = PERF_COLOR_NORMAL;
 637         if (ratio > 20.0)
 638                 color = PERF_COLOR_RED;
 639         else if (ratio > 10.0)
 640                 color = PERF_COLOR_MAGENTA;
 641         else if (ratio > 5.0)
 642                 color = PERF_COLOR_YELLOW;
 643
 644         fprintf(output, " #  ");
 645         color_fprintf(output, color, "%6.2f%%", ratio);
 646         fprintf(output, " of all branches        ");
 647 }
 648
 649 static void print_l1_dcache_misses(int cpu, struct perf_evsel *evsel __used, double avg)
 650 {
 651         double total, ratio = 0.0;
 652         const char *color;
 653
 654         total = avg_stats(&runtime_l1_dcache_stats[cpu]);
 655
 656         if (total)
 657                 ratio = avg / total * 100.0;
 658
 659         color = PERF_COLOR_NORMAL;
 660         if (ratio > 20.0)
 661                 color = PERF_COLOR_RED;
 662         else if (ratio > 10.0)
 663                 color = PERF_COLOR_MAGENTA;
 664         else if (ratio > 5.0)
 665                 color = PERF_COLOR_YELLOW;
 666
 667         fprintf(output, " #  ");
 668         color_fprintf(output, color, "%6.2f%%", ratio);
 669         fprintf(output, " of all L1-dcache hits  ");
 670 }
 671
 672 static void print_l1_icache_misses(int cpu, struct perf_evsel *evsel __used, double avg)
 673 {
 674         double total, ratio = 0.0;
 675         const char *color;
 676
 677         total = avg_stats(&runtime_l1_icache_stats[cpu]);
 678
 679         if (total)
 680                 ratio = avg / total * 100.0;
 681
 682         color = PERF_COLOR_NORMAL;
 683         if (ratio > 20.0)
 684                 color = PERF_COLOR_RED;
 685         else if (ratio > 10.0)
 686                 color = PERF_COLOR_MAGENTA;
 687         else if (ratio > 5.0)
 688                 color = PERF_COLOR_YELLOW;
 689
 690         fprintf(output, " #  ");
 691         color_fprintf(output, color, "%6.2f%%", ratio);
 692         fprintf(output, " of all L1-icache hits  ");
 693 }
 694
 695 static void print_dtlb_cache_misses(int cpu, struct perf_evsel *evsel __used, double avg)
 696 {
 697         double total, ratio = 0.0;
 698         const char *color;
 699
 700         total = avg_stats(&runtime_dtlb_cache_stats[cpu]);
 701
 702         if (total)
 703                 ratio = avg / total * 100.0;
 704
 705         color = PERF_COLOR_NORMAL;
 706         if (ratio > 20.0)
 707                 color = PERF_COLOR_RED;
 708         else if (ratio > 10.0)
 709                 color = PERF_COLOR_MAGENTA;
 710         else if (ratio > 5.0)
 711                 color = PERF_COLOR_YELLOW;
 712
 713         fprintf(output, " #  ");
 714         color_fprintf(output, color, "%6.2f%%", ratio);
 715         fprintf(output, " of all dTLB cache hits ");
 716 }
 717
 718 static void print_itlb_cache_misses(int cpu, struct perf_evsel *evsel __used, double avg)
 719 {
 720         double total, ratio = 0.0;
 721         const char *color;
 722
 723         total = avg_stats(&runtime_itlb_cache_stats[cpu]);
 724
 725         if (total)
 726                 ratio = avg / total * 100.0;
 727
 728         color = PERF_COLOR_NORMAL;
 729         if (ratio > 20.0)
 730                 color = PERF_COLOR_RED;
 731         else if (ratio > 10.0)
 732                 color = PERF_COLOR_MAGENTA;
 733         else if (ratio > 5.0)
 734                 color = PERF_COLOR_YELLOW;
 735
 736         fprintf(output, " #  ");
 737         color_fprintf(output, color, "%6.2f%%", ratio);
 738         fprintf(output, " of all iTLB cache hits ");
 739 }
 740
 741 static void print_ll_cache_misses(int cpu, struct perf_evsel *evsel __used, double avg)
 742 {
 743         double total, ratio = 0.0;
 744         const char *color;
 745
 746         total = avg_stats(&runtime_ll_cache_stats[cpu]);
 747
 748         if (total)
 749                 ratio = avg / total * 100.0;
 750
 751         color = PERF_COLOR_NORMAL;
 752         if (ratio > 20.0)
 753                 color = PERF_COLOR_RED;
 754         else if (ratio > 10.0)
 755                 color = PERF_COLOR_MAGENTA;
 756         else if (ratio > 5.0)
 757                 color = PERF_COLOR_YELLOW;
 758
 759         fprintf(output, " #  ");
 760         color_fprintf(output, color, "%6.2f%%", ratio);
 761         fprintf(output, " of all LL-cache hits   ");
 762 }
 763
 764 static void abs_printout(int cpu, struct perf_evsel *evsel, double avg)
 765 {
 766         double total, ratio = 0.0;
 767         char cpustr[16] = { '\0', };
 768         const char *fmt;
 769
 770         if (csv_output)
 771                 fmt = "%s%.0f%s%s";
 772         else if (big_num)
 773                 fmt = "%s%'18.0f%s%-25s";
 774         else
 775                 fmt = "%s%18.0f%s%-25s";
 776
 777         if (no_aggr)
 778                 sprintf(cpustr, "CPU%*d%s",
 779                         csv_output ? 0 : -4,
 780                         evsel_list->cpus->map[cpu], csv_sep);
 781         else
 782                 cpu = 0;
 783
 784         fprintf(output, fmt, cpustr, avg, csv_sep, event_name(evsel));
 785
 786         if (evsel->cgrp)
 787                 fprintf(output, "%s%s", csv_sep, evsel->cgrp->name);
 788
 789         if (csv_output)
 790                 return;
 791
 792         if (perf_evsel__match(evsel, HARDWARE, HW_INSTRUCTIONS)) {
 793                 total = avg_stats(&runtime_cycles_stats[cpu]);
 794
 795                 if (total)
 796                         ratio = avg / total;
 797
 798                 fprintf(output, " #   %5.2f  insns per cycle        ", ratio);
 799
 800                 total = avg_stats(&runtime_stalled_cycles_front_stats[cpu]);
 801                 total = max(total, avg_stats(&runtime_stalled_cycles_back_stats[cpu]));
 802
 803                 if (total && avg) {
 804                         ratio = total / avg;
 805                         fprintf(output, "\n                                             #   %5.2f  stalled cycles per insn", ratio);
 806                 }
 807
 808         } else if (perf_evsel__match(evsel, HARDWARE, HW_BRANCH_MISSES) &&
 809                         runtime_branches_stats[cpu].n != 0) {
 810                 print_branch_misses(cpu, evsel, avg);
 811         } else if (
 812                 evsel->attr.type == PERF_TYPE_HW_CACHE &&
 813                 evsel->attr.config ==  ( PERF_COUNT_HW_CACHE_L1D |
 814                                         ((PERF_COUNT_HW_CACHE_OP_READ) << 8) |
 815                                         ((PERF_COUNT_HW_CACHE_RESULT_MISS) << 16)) &&
 816                         runtime_l1_dcache_stats[cpu].n != 0) {
 817                 print_l1_dcache_misses(cpu, evsel, avg);
 818         } else if (
 819                 evsel->attr.type == PERF_TYPE_HW_CACHE &&
 820                 evsel->attr.config ==  ( PERF_COUNT_HW_CACHE_L1I |
 821                                         ((PERF_COUNT_HW_CACHE_OP_READ) << 8) |
 822                                         ((PERF_COUNT_HW_CACHE_RESULT_MISS) << 16)) &&
 823                         runtime_l1_icache_stats[cpu].n != 0) {
 824                 print_l1_icache_misses(cpu, evsel, avg);
 825         } else if (
 826                 evsel->attr.type == PERF_TYPE_HW_CACHE &&
 827                 evsel->attr.config ==  ( PERF_COUNT_HW_CACHE_DTLB |
 828                                         ((PERF_COUNT_HW_CACHE_OP_READ) << 8) |
 829                                         ((PERF_COUNT_HW_CACHE_RESULT_MISS) << 16)) &&
 830                         runtime_dtlb_cache_stats[cpu].n != 0) {
 831                 print_dtlb_cache_misses(cpu, evsel, avg);
 832         } else if (
 833                 evsel->attr.type == PERF_TYPE_HW_CACHE &&
 834                 evsel->attr.config ==  ( PERF_COUNT_HW_CACHE_ITLB |
 835                                         ((PERF_COUNT_HW_CACHE_OP_READ) << 8) |
 836                                         ((PERF_COUNT_HW_CACHE_RESULT_MISS) << 16)) &&
 837                         runtime_itlb_cache_stats[cpu].n != 0) {
 838                 print_itlb_cache_misses(cpu, evsel, avg);
 839         } else if (
 840                 evsel->attr.type == PERF_TYPE_HW_CACHE &&
 841                 evsel->attr.config ==  ( PERF_COUNT_HW_CACHE_LL |
 842                                         ((PERF_COUNT_HW_CACHE_OP_READ) << 8) |
 843                                         ((PERF_COUNT_HW_CACHE_RESULT_MISS) << 16)) &&
 844                         runtime_ll_cache_stats[cpu].n != 0) {
 845                 print_ll_cache_misses(cpu, evsel, avg);
 846         } else if (perf_evsel__match(evsel, HARDWARE, HW_CACHE_MISSES) &&
 847                         runtime_cacherefs_stats[cpu].n != 0) {
 848                 total = avg_stats(&runtime_cacherefs_stats[cpu]);
 849
 850                 if (total)
 851                         ratio = avg * 100 / total;
 852
 853                 fprintf(output, " # %8.3f %% of all cache refs    ", ratio);
 854
 855         } else if (perf_evsel__match(evsel, HARDWARE, HW_STALLED_CYCLES_FRONTEND)) {
 856                 print_stalled_cycles_frontend(cpu, evsel, avg);
 857         } else if (perf_evsel__match(evsel, HARDWARE, HW_STALLED_CYCLES_BACKEND)) {
 858                 print_stalled_cycles_backend(cpu, evsel, avg);
 859         } else if (perf_evsel__match(evsel, HARDWARE, HW_CPU_CYCLES)) {
 860                 total = avg_stats(&runtime_nsecs_stats[cpu]);
 861
 862                 if (total)
 863                         ratio = 1.0 * avg / total;
 864
 865                 fprintf(output, " # %8.3f GHz                    ", ratio);
 866         } else if (runtime_nsecs_stats[cpu].n != 0) {
 867                 total = avg_stats(&runtime_nsecs_stats[cpu]);
 868
 869                 if (total)
 870                         ratio = 1000.0 * avg / total;
 871
 872                 fprintf(output, " # %8.3f M/sec                  ", ratio);
 873         } else {
 874                 fprintf(output, "                                   ");
 875         }
 876 }
 877
 878 /*
 879  * Print out the results of a single counter:
 880  * aggregated counts in system-wide mode
 881  */
 882 static void print_counter_aggr(struct perf_evsel *counter)
 883 {
 884         struct perf_stat *ps = counter->priv;
 885         double avg = avg_stats(&ps->res_stats[0]);
 886         int scaled = counter->counts->scaled;
 887
 888         if (scaled == -1) {
 889                 fprintf(output, "%*s%s%*s",
 890                         csv_output ? 0 : 18,
 891                         counter->supported ? CNTR_NOT_COUNTED : CNTR_NOT_SUPPORTED,
 892                         csv_sep,
 893                         csv_output ? 0 : -24,
 894                         event_name(counter));
 895
 896                 if (counter->cgrp)
 897                         fprintf(output, "%s%s", csv_sep, counter->cgrp->name);
 898
 899                 fputc('\n', output);
 900                 return;
 901         }
 902
 903         if (nsec_counter(counter))
 904                 nsec_printout(-1, counter, avg);
 905         else
 906                 abs_printout(-1, counter, avg);
 907
 908         print_noise(counter, avg);
 909
 910         if (csv_output) {
 911                 fputc('\n', output);
 912                 return;
 913         }
 914
 915         if (scaled) {
 916                 double avg_enabled, avg_running;
 917
 918                 avg_enabled = avg_stats(&ps->res_stats[1]);
 919                 avg_running = avg_stats(&ps->res_stats[2]);
 920
 921                 fprintf(output, " [%5.2f%%]", 100 * avg_running / avg_enabled);
 922         }
 923         fprintf(output, "\n");
 924 }
 925
 926 /*
 927  * Print out the results of a single counter:
 928  * does not use aggregated count in system-wide
 929  */
 930 static void print_counter(struct perf_evsel *counter)
 931 {
 932         u64 ena, run, val;
 933         int cpu;
 934
 935         for (cpu = 0; cpu < evsel_list->cpus->nr; cpu++) {
 936                 val = counter->counts->cpu[cpu].val;
 937                 ena = counter->counts->cpu[cpu].ena;
 938                 run = counter->counts->cpu[cpu].run;
 939                 if (run == 0 || ena == 0) {
 940                         fprintf(output, "CPU%*d%s%*s%s%*s",
 941                                 csv_output ? 0 : -4,
 942                                 evsel_list->cpus->map[cpu], csv_sep,
 943                                 csv_output ? 0 : 18,
 944                                 counter->supported ? CNTR_NOT_COUNTED : CNTR_NOT_SUPPORTED,
 945                                 csv_sep,
 946                                 csv_output ? 0 : -24,
 947                                 event_name(counter));
 948
 949                         if (counter->cgrp)
 950                                 fprintf(output, "%s%s",
 951                                         csv_sep, counter->cgrp->name);
 952
 953                         fputc('\n', output);
 954                         continue;
 955                 }
 956
 957                 if (nsec_counter(counter))
 958                         nsec_printout(cpu, counter, val);
 959                 else
 960                         abs_printout(cpu, counter, val);
 961
 962                 if (!csv_output) {
 963                         print_noise(counter, 1.0);
 964
 965                         if (run != ena)
 966                                 fprintf(output, "  (%.2f%%)",
 967                                         100.0 * run / ena);
 968                 }
 969                 fputc('\n', output);
 970         }
 971 }
 972
 973 static void print_stat(int argc, const char **argv)
 974 {
 975         struct perf_evsel *counter;
 976         int i;
 977
 978         fflush(stdout);
 979
 980         if (!csv_output) {
 981                 fprintf(output, "\n");
 982                 fprintf(output, " Performance counter stats for ");
 983                 if(target_pid == -1 && target_tid == -1) {
 984                         fprintf(output, "\'%s", argv[0]);
 985                         for (i = 1; i < argc; i++)
 986                                 fprintf(output, " %s", argv[i]);
 987                 } else if (target_pid != -1)
 988                         fprintf(output, "process id \'%d", target_pid);
 989                 else
 990                         fprintf(output, "thread id \'%d", target_tid);
 991
 992                 fprintf(output, "\'");
 993                 if (run_count > 1)
 994                         fprintf(output, " (%d runs)", run_count);
 995                 fprintf(output, ":\n\n");
 996         }
 997
 998         if (no_aggr) {
 999                 list_for_each_entry(counter, &evsel_list->entries, node)
1000                         print_counter(counter);
1001         } else {
1002                 list_for_each_entry(counter, &evsel_list->entries, node)
1003                         print_counter_aggr(counter);
1004         }
1005
1006         if (!csv_output) {
1007                 if (!null_run)
1008                         fprintf(output, "\n");
1009                 fprintf(output, " %17.9f seconds time elapsed",
1010                                 avg_stats(&walltime_nsecs_stats)/1e9);
1011                 if (run_count > 1) {
1012                         fprintf(output, "                                        ");
1013                         print_noise_pct(stddev_stats(&walltime_nsecs_stats),
1014                                         avg_stats(&walltime_nsecs_stats));
1015                 }
1016                 fprintf(output, "\n\n");
1017         }
1018 }
1019
1020 static volatile int signr = -1;
1021
1022 static void skip_signal(int signo)
1023 {
1024         if(child_pid == -1)
1025                 done = 1;
1026
1027         signr = signo;
1028 }
1029
1030 static void sig_atexit(void)
1031 {
1032         if (child_pid != -1)
1033                 kill(child_pid, SIGTERM);
1034
1035         if (signr == -1)
1036                 return;
1037
1038         signal(signr, SIG_DFL);
1039         kill(getpid(), signr);
1040 }
1041
1042 static const char * const stat_usage[] = {
1043         "perf stat [<options>] [<command>]",
1044         NULL
1045 };
1046
1047 static int stat__set_big_num(const struct option *opt __used,
1048                              const char *s __used, int unset)
1049 {
1050         big_num_opt = unset ? 0 : 1;
1051         return 0;
1052 }
1053
1054 static bool append_file;
1055
1056 static const struct option options[] = {
1057         OPT_CALLBACK('e', "event", &evsel_list, "event",
1058                      "event selector. use 'perf list' to list available events",
1059                      parse_events_option),
1060         OPT_CALLBACK(0, "filter", &evsel_list, "filter",
1061                      "event filter", parse_filter),
1062         OPT_BOOLEAN('i', "no-inherit", &no_inherit,
1063                     "child tasks do not inherit counters"),
1064         OPT_INTEGER('p', "pid", &target_pid,
1065                     "stat events on existing process id"),
1066         OPT_INTEGER('t', "tid", &target_tid,
1067                     "stat events on existing thread id"),
1068         OPT_BOOLEAN('a', "all-cpus", &system_wide,
1069                     "system-wide collection from all CPUs"),
1070         OPT_BOOLEAN('g', "group", &group,
1071                     "put the counters into a counter group"),
1072         OPT_BOOLEAN('c', "scale", &scale,
1073                     "scale/normalize counters"),
1074         OPT_INCR('v', "verbose", &verbose,
1075                     "be more verbose (show counter open errors, etc)"),
1076         OPT_INTEGER('r', "repeat", &run_count,
1077                     "repeat command and print average + stddev (max: 100)"),
1078         OPT_BOOLEAN('n', "null", &null_run,
1079                     "null run - dont start any counters"),
1080         OPT_INCR('d', "detailed", &detailed_run,
1081                     "detailed run - start a lot of events"),
1082         OPT_BOOLEAN('S', "sync", &sync_run,
1083                     "call sync() before starting a run"),
1084         OPT_CALLBACK_NOOPT('B', "big-num", NULL, NULL,
1085                            "print large numbers with thousands\' separators",
1086                            stat__set_big_num),
1087         OPT_STRING('C', "cpu", &cpu_list, "cpu",
1088                     "list of cpus to monitor in system-wide"),
1089         OPT_BOOLEAN('A', "no-aggr", &no_aggr,
1090                     "disable CPU count aggregation"),
1091         OPT_STRING('x', "field-separator", &csv_sep, "separator",
1092                    "print counts with custom separator"),
1093         OPT_CALLBACK('G', "cgroup", &evsel_list, "name",
1094                      "monitor event in cgroup name only",
1095                      parse_cgroups),
1096         OPT_STRING('o', "output", &output_name, "file",
1097                     "output file name"),
1098         OPT_BOOLEAN(0, "append", &append_file, "append to the output file"),
1099         OPT_INTEGER(0, "log-fd", &output_fd,
1100                     "log output to fd, instead of stderr"),
1101         OPT_END()
1102 };
1103
1104 /*
1105  * Add default attributes, if there were no attributes specified or
1106  * if -d/--detailed, -d -d or -d -d -d is used:
1107  */
1108 static int add_default_attributes(void)
1109 {
1110         struct perf_evsel *pos;
1111         size_t attr_nr = 0;
1112         size_t c;
1113
1114         /* Set attrs if no event is selected and !null_run: */
1115         if (null_run)
1116                 return 0;
1117
1118         if (!evsel_list->nr_entries) {
1119                 for (c = 0; c < ARRAY_SIZE(default_attrs); c++) {
1120                         pos = perf_evsel__new(default_attrs + c, c + attr_nr);
1121                         if (pos == NULL)
1122                                 return -1;
1123                         perf_evlist__add(evsel_list, pos);
1124                 }
1125                 attr_nr += c;
1126         }
1127
1128         /* Detailed events get appended to the event list: */
1129
1130         if (detailed_run <  1)
1131                 return 0;
1132
1133         /* Append detailed run extra attributes: */
1134         for (c = 0; c < ARRAY_SIZE(detailed_attrs); c++) {
1135                 pos = perf_evsel__new(detailed_attrs + c, c + attr_nr);
1136                 if (pos == NULL)
1137                         return -1;
1138                 perf_evlist__add(evsel_list, pos);
1139         }
1140         attr_nr += c;
1141
1142         if (detailed_run < 2)
1143                 return 0;
1144
1145         /* Append very detailed run extra attributes: */
1146         for (c = 0; c < ARRAY_SIZE(very_detailed_attrs); c++) {
1147                 pos = perf_evsel__new(very_detailed_attrs + c, c + attr_nr);
1148                 if (pos == NULL)
1149                         return -1;
1150                 perf_evlist__add(evsel_list, pos);
1151         }
1152
1153         if (detailed_run < 3)
1154                 return 0;
1155
1156         /* Append very, very detailed run extra attributes: */
1157         for (c = 0; c < ARRAY_SIZE(very_very_detailed_attrs); c++) {
1158                 pos = perf_evsel__new(very_very_detailed_attrs + c, c + attr_nr);
1159                 if (pos == NULL)
1160                         return -1;
1161                 perf_evlist__add(evsel_list, pos);
1162         }
1163
1164
1165         return 0;
1166 }
1167
1168 int cmd_stat(int argc, const char **argv, const char *prefix __used)
1169 {
1170         struct perf_evsel *pos;
1171         int status = -ENOMEM;
1172         const char *mode;
1173
1174         setlocale(LC_ALL, "");
1175
1176         evsel_list = perf_evlist__new(NULL, NULL);
1177         if (evsel_list == NULL)
1178                 return -ENOMEM;
1179
1180         argc = parse_options(argc, argv, options, stat_usage,
1181                 PARSE_OPT_STOP_AT_NON_OPTION);
1182
1183         output = stderr;
1184         if (output_name && strcmp(output_name, "-"))
1185                 output = NULL;
1186
1187         if (output_name && output_fd) {
1188                 fprintf(stderr, "cannot use both --output and --log-fd\n");
1189                 usage_with_options(stat_usage, options);
1190         }
1191         if (!output) {
1192                 struct timespec tm;
1193                 mode = append_file ? "a" : "w";
1194
1195                 output = fopen(output_name, mode);
1196                 if (!output) {
1197                         perror("failed to create output file");
1198                         exit(-1);
1199                 }
1200                 clock_gettime(CLOCK_REALTIME, &tm);
1201                 fprintf(output, "# started on %s\n", ctime(&tm.tv_sec));
1202         } else if (output_fd != 2) {
1203                 mode = append_file ? "a" : "w";
1204                 output = fdopen(output_fd, mode);
1205                 if (!output) {
1206                         perror("Failed opening logfd");
1207                         return -errno;
1208                 }
1209         }
1210
1211         if (csv_sep) {
1212                 csv_output = true;
1213                 if (!strcmp(csv_sep, "\\t"))
1214                         csv_sep = "\t";
1215         } else
1216                 csv_sep = DEFAULT_SEPARATOR;
1217
1218         /*
1219          * let the spreadsheet do the pretty-printing
1220          */
1221         if (csv_output) {
1222                 /* User explicitly passed -B? */
1223                 if (big_num_opt == 1) {
1224                         fprintf(stderr, "-B option not supported with -x\n");
1225                         usage_with_options(stat_usage, options);
1226                 } else /* Nope, so disable big number formatting */
1227                         big_num = false;
1228         } else if (big_num_opt == 0) /* User passed --no-big-num */
1229                 big_num = false;
1230
1231         if (!argc && target_pid == -1 && target_tid == -1)
1232                 usage_with_options(stat_usage, options);
1233         if (run_count <= 0)
1234                 usage_with_options(stat_usage, options);
1235
1236         /* no_aggr, cgroup are for system-wide only */
1237         if ((no_aggr || nr_cgroups) && !system_wide) {
1238                 fprintf(stderr, "both cgroup and no-aggregation "
1239                         "modes only available in system-wide mode\n");
1240
1241                 usage_with_options(stat_usage, options);
1242         }
1243
1244         if (add_default_attributes())
1245                 goto out;
1246
1247         if (target_pid != -1)
1248                 target_tid = target_pid;
1249
1250         evsel_list->threads = thread_map__new(target_pid, target_tid);
1251         if (evsel_list->threads == NULL) {
1252                 pr_err("Problems finding threads of monitor\n");
1253                 usage_with_options(stat_usage, options);
1254         }
1255
1256         if (system_wide)
1257                 evsel_list->cpus = cpu_map__new(cpu_list);
1258         else
1259                 evsel_list->cpus = cpu_map__dummy_new();
1260
1261         if (evsel_list->cpus == NULL) {
1262                 perror("failed to parse CPUs map");
1263                 usage_with_options(stat_usage, options);
1264                 return -1;
1265         }
1266
1267         list_for_each_entry(pos, &evsel_list->entries, node) {
1268                 if (perf_evsel__alloc_stat_priv(pos) < 0 ||
1269                     perf_evsel__alloc_counts(pos, evsel_list->cpus->nr) < 0 ||
1270                     perf_evsel__alloc_fd(pos, evsel_list->cpus->nr, evsel_list->threads->nr) < 0)
1271                         goto out_free_fd;
1272         }
1273
1274         /*
1275          * We dont want to block the signals - that would cause
1276          * child tasks to inherit that and Ctrl-C would not work.
1277          * What we want is for Ctrl-C to work in the exec()-ed
1278          * task, but being ignored by perf stat itself:
1279          */
1280         atexit(sig_atexit);
1281         signal(SIGINT,  skip_signal);
1282         signal(SIGALRM, skip_signal);
1283         signal(SIGABRT, skip_signal);
1284
1285         status = 0;
1286         for (run_idx = 0; run_idx < run_count; run_idx++) {
1287                 if (run_count != 1 && verbose)
1288                         fprintf(output, "[ perf stat: executing run #%d ... ]\n",
1289                                 run_idx + 1);
1290
1291                 if (sync_run)
1292                         sync();
1293
1294                 status = run_perf_stat(argc, argv);
1295         }
1296
1297         if (status != -1)
1298                 print_stat(argc, argv);
1299 out_free_fd:
1300         list_for_each_entry(pos, &evsel_list->entries, node)
1301                 perf_evsel__free_stat_priv(pos);
1302         perf_evlist__delete_maps(evsel_list);
1303 out:
1304         perf_evlist__delete(evsel_list);
1305         return status;
1306 }