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 {
 283         struct perf_event_attr *attr = &evsel->attr;
 284
 285         if (scale)
 286                 attr->read_format = PERF_FORMAT_TOTAL_TIME_ENABLED |
 287                                     PERF_FORMAT_TOTAL_TIME_RUNNING;
 288
 289         attr->inherit = !no_inherit;
 290
 291         if (system_wide)
 292                 return perf_evsel__open_per_cpu(evsel, evsel_list->cpus, group);
 293
 294         if (target_pid == -1 && target_tid == -1) {
 295                 attr->disabled = 1;
 296                 attr->enable_on_exec = 1;
 297         }
 298
 299         return perf_evsel__open_per_thread(evsel, evsel_list->threads, group);
 300 }
 301
 302 /*
 303  * Does the counter have nsecs as a unit?
 304  */
 305 static inline int nsec_counter(struct perf_evsel *evsel)
 306 {
 307         if (perf_evsel__match(evsel, SOFTWARE, SW_CPU_CLOCK) ||
 308             perf_evsel__match(evsel, SOFTWARE, SW_TASK_CLOCK))
 309                 return 1;
 310
 311         return 0;
 312 }
 313
 314 /*
 315  * Update various tracking values we maintain to print
 316  * more semantic information such as miss/hit ratios,
 317  * instruction rates, etc:
 318  */
 319 static void update_shadow_stats(struct perf_evsel *counter, u64 *count)
 320 {
 321         if (perf_evsel__match(counter, SOFTWARE, SW_TASK_CLOCK))
 322                 update_stats(&runtime_nsecs_stats[0], count[0]);
 323         else if (perf_evsel__match(counter, HARDWARE, HW_CPU_CYCLES))
 324                 update_stats(&runtime_cycles_stats[0], count[0]);
 325         else if (perf_evsel__match(counter, HARDWARE, HW_STALLED_CYCLES_FRONTEND))
 326                 update_stats(&runtime_stalled_cycles_front_stats[0], count[0]);
 327         else if (perf_evsel__match(counter, HARDWARE, HW_STALLED_CYCLES_BACKEND))
 328                 update_stats(&runtime_stalled_cycles_back_stats[0], count[0]);
 329         else if (perf_evsel__match(counter, HARDWARE, HW_BRANCH_INSTRUCTIONS))
 330                 update_stats(&runtime_branches_stats[0], count[0]);
 331         else if (perf_evsel__match(counter, HARDWARE, HW_CACHE_REFERENCES))
 332                 update_stats(&runtime_cacherefs_stats[0], count[0]);
 333         else if (perf_evsel__match(counter, HW_CACHE, HW_CACHE_L1D))
 334                 update_stats(&runtime_l1_dcache_stats[0], count[0]);
 335         else if (perf_evsel__match(counter, HW_CACHE, HW_CACHE_L1I))
 336                 update_stats(&runtime_l1_icache_stats[0], count[0]);
 337         else if (perf_evsel__match(counter, HW_CACHE, HW_CACHE_LL))
 338                 update_stats(&runtime_ll_cache_stats[0], count[0]);
 339         else if (perf_evsel__match(counter, HW_CACHE, HW_CACHE_DTLB))
 340                 update_stats(&runtime_dtlb_cache_stats[0], count[0]);
 341         else if (perf_evsel__match(counter, HW_CACHE, HW_CACHE_ITLB))
 342                 update_stats(&runtime_itlb_cache_stats[0], count[0]);
 343 }
 344
 345 /*
 346  * Read out the results of a single counter:
 347  * aggregate counts across CPUs in system-wide mode
 348  */
 349 static int read_counter_aggr(struct perf_evsel *counter)
 350 {
 351         struct perf_stat *ps = counter->priv;
 352         u64 *count = counter->counts->aggr.values;
 353         int i;
 354
 355         if (__perf_evsel__read(counter, evsel_list->cpus->nr,
 356                                evsel_list->threads->nr, scale) < 0)
 357                 return -1;
 358
 359         for (i = 0; i < 3; i++)
 360                 update_stats(&ps->res_stats[i], count[i]);
 361
 362         if (verbose) {
 363                 fprintf(output, "%s: %" PRIu64 " %" PRIu64 " %" PRIu64 "\n",
 364                         event_name(counter), count[0], count[1], count[2]);
 365         }
 366
 367         /*
 368          * Save the full runtime - to allow normalization during printout:
 369          */
 370         update_shadow_stats(counter, count);
 371
 372         return 0;
 373 }
 374
 375 /*
 376  * Read out the results of a single counter:
 377  * do not aggregate counts across CPUs in system-wide mode
 378  */
 379 static int read_counter(struct perf_evsel *counter)
 380 {
 381         u64 *count;
 382         int cpu;
 383
 384         for (cpu = 0; cpu < evsel_list->cpus->nr; cpu++) {
 385                 if (__perf_evsel__read_on_cpu(counter, cpu, 0, scale) < 0)
 386                         return -1;
 387
 388                 count = counter->counts->cpu[cpu].values;
 389
 390                 update_shadow_stats(counter, count);
 391         }
 392
 393         return 0;
 394 }
 395
 396 static int run_perf_stat(int argc __used, const char **argv)
 397 {
 398         unsigned long long t0, t1;
 399         struct perf_evsel *counter;
 400         int status = 0;
 401         int child_ready_pipe[2], go_pipe[2];
 402         const bool forks = (argc > 0);
 403         char buf;
 404
 405         if (forks && (pipe(child_ready_pipe) < 0 || pipe(go_pipe) < 0)) {
 406                 perror("failed to create pipes");
 407                 exit(1);
 408         }
 409
 410         if (forks) {
 411                 if ((child_pid = fork()) < 0)
 412                         perror("failed to fork");
 413
 414                 if (!child_pid) {
 415                         close(child_ready_pipe[0]);
 416                         close(go_pipe[1]);
 417                         fcntl(go_pipe[0], F_SETFD, FD_CLOEXEC);
 418
 419                         /*
 420                          * Do a dummy execvp to get the PLT entry resolved,
 421                          * so we avoid the resolver overhead on the real
 422                          * execvp call.
 423                          */
 424                         execvp("", (char **)argv);
 425
 426                         /*
 427                          * Tell the parent we're ready to go
 428                          */
 429                         close(child_ready_pipe[1]);
 430
 431                         /*
 432                          * Wait until the parent tells us to go.
 433                          */
 434                         if (read(go_pipe[0], &buf, 1) == -1)
 435                                 perror("unable to read pipe");
 436
 437                         execvp(argv[0], (char **)argv);
 438
 439                         perror(argv[0]);
 440                         exit(-1);
 441                 }
 442
 443                 if (target_tid == -1 && target_pid == -1 && !system_wide)
 444                         evsel_list->threads->map[0] = child_pid;
 445
 446                 /*
 447                  * Wait for the child to be ready to exec.
 448                  */
 449                 close(child_ready_pipe[1]);
 450                 close(go_pipe[0]);
 451                 if (read(child_ready_pipe[0], &buf, 1) == -1)
 452                         perror("unable to read pipe");
 453                 close(child_ready_pipe[0]);
 454         }
 455
 456         list_for_each_entry(counter, &evsel_list->entries, node) {
 457                 if (create_perf_stat_counter(counter) < 0) {
 458                         if (errno == EINVAL || errno == ENOSYS || errno == ENOENT) {
 459                                 if (verbose)
 460                                         ui__warning("%s event is not supported by the kernel.\n",
 461                                                     event_name(counter));
 462                                 counter->supported = false;
 463                                 continue;
 464                         }
 465
 466                         if (errno == EPERM || errno == EACCES) {
 467                                 error("You may not have permission to collect %sstats.\n"
 468                                       "\t Consider tweaking"
 469                                       " /proc/sys/kernel/perf_event_paranoid or running as root.",
 470                                       system_wide ? "system-wide " : "");
 471                         } else {
 472                                 error("open_counter returned with %d (%s). "
 473                                       "/bin/dmesg may provide additional information.\n",
 474                                        errno, strerror(errno));
 475                         }
 476                         if (child_pid != -1)
 477                                 kill(child_pid, SIGTERM);
 478                         die("Not all events could be opened.\n");
 479                         return -1;
 480                 }
 481                 counter->supported = true;
 482         }
 483
 484         if (perf_evlist__set_filters(evsel_list)) {
 485                 error("failed to set filter with %d (%s)\n", errno,
 486                         strerror(errno));
 487                 return -1;
 488         }
 489
 490         /*
 491          * Enable counters and exec the command:
 492          */
 493         t0 = rdclock();
 494
 495         if (forks) {
 496                 close(go_pipe[1]);
 497                 wait(&status);
 498                 if (WIFSIGNALED(status))
 499                         psignal(WTERMSIG(status), argv[0]);
 500         } else {
 501                 while(!done) sleep(1);
 502         }
 503
 504         t1 = rdclock();
 505
 506         update_stats(&walltime_nsecs_stats, t1 - t0);
 507
 508         if (no_aggr) {
 509                 list_for_each_entry(counter, &evsel_list->entries, node) {
 510                         read_counter(counter);
 511                         perf_evsel__close_fd(counter, evsel_list->cpus->nr, 1);
 512                 }
 513         } else {
 514                 list_for_each_entry(counter, &evsel_list->entries, node) {
 515                         read_counter_aggr(counter);
 516                         perf_evsel__close_fd(counter, evsel_list->cpus->nr,
 517                                              evsel_list->threads->nr);
 518                 }
 519         }
 520
 521         return WEXITSTATUS(status);
 522 }
 523
 524 static void print_noise_pct(double total, double avg)
 525 {
 526         double pct = 0.0;
 527
 528         if (avg)
 529                 pct = 100.0*total/avg;
 530
 531         if (csv_output)
 532                 fprintf(output, "%s%.2f%%", csv_sep, pct);
 533         else if (pct)
 534                 fprintf(output, "  ( +-%6.2f%% )", pct);
 535 }
 536
 537 static void print_noise(struct perf_evsel *evsel, double avg)
 538 {
 539         struct perf_stat *ps;
 540
 541         if (run_count == 1)
 542                 return;
 543
 544         ps = evsel->priv;
 545         print_noise_pct(stddev_stats(&ps->res_stats[0]), avg);
 546 }
 547
 548 static void nsec_printout(int cpu, struct perf_evsel *evsel, double avg)
 549 {
 550         double msecs = avg / 1e6;
 551         char cpustr[16] = { '\0', };
 552         const char *fmt = csv_output ? "%s%.6f%s%s" : "%s%18.6f%s%-25s";
 553
 554         if (no_aggr)
 555                 sprintf(cpustr, "CPU%*d%s",
 556                         csv_output ? 0 : -4,
 557                         evsel_list->cpus->map[cpu], csv_sep);
 558
 559         fprintf(output, fmt, cpustr, msecs, csv_sep, event_name(evsel));
 560
 561         if (evsel->cgrp)
 562                 fprintf(output, "%s%s", csv_sep, evsel->cgrp->name);
 563
 564         if (csv_output)
 565                 return;
 566
 567         if (perf_evsel__match(evsel, SOFTWARE, SW_TASK_CLOCK))
 568                 fprintf(output, " # %8.3f CPUs utilized          ",
 569                         avg / avg_stats(&walltime_nsecs_stats));
 570 }
 571
 572 static void print_stalled_cycles_frontend(int cpu, struct perf_evsel *evsel __used, double avg)
 573 {
 574         double total, ratio = 0.0;
 575         const char *color;
 576
 577         total = avg_stats(&runtime_cycles_stats[cpu]);
 578
 579         if (total)
 580                 ratio = avg / total * 100.0;
 581
 582         color = PERF_COLOR_NORMAL;
 583         if (ratio > 50.0)
 584                 color = PERF_COLOR_RED;
 585         else if (ratio > 30.0)
 586                 color = PERF_COLOR_MAGENTA;
 587         else if (ratio > 10.0)
 588                 color = PERF_COLOR_YELLOW;
 589
 590         fprintf(output, " #  ");
 591         color_fprintf(output, color, "%6.2f%%", ratio);
 592         fprintf(output, " frontend cycles idle   ");
 593 }
 594
 595 static void print_stalled_cycles_backend(int cpu, struct perf_evsel *evsel __used, double avg)
 596 {
 597         double total, ratio = 0.0;
 598         const char *color;
 599
 600         total = avg_stats(&runtime_cycles_stats[cpu]);
 601
 602         if (total)
 603                 ratio = avg / total * 100.0;
 604
 605         color = PERF_COLOR_NORMAL;
 606         if (ratio > 75.0)
 607                 color = PERF_COLOR_RED;
 608         else if (ratio > 50.0)
 609                 color = PERF_COLOR_MAGENTA;
 610         else if (ratio > 20.0)
 611                 color = PERF_COLOR_YELLOW;
 612
 613         fprintf(output, " #  ");
 614         color_fprintf(output, color, "%6.2f%%", ratio);
 615         fprintf(output, " backend  cycles idle   ");
 616 }
 617
 618 static void print_branch_misses(int cpu, struct perf_evsel *evsel __used, double avg)
 619 {
 620         double total, ratio = 0.0;
 621         const char *color;
 622
 623         total = avg_stats(&runtime_branches_stats[cpu]);
 624
 625         if (total)
 626                 ratio = avg / total * 100.0;
 627
 628         color = PERF_COLOR_NORMAL;
 629         if (ratio > 20.0)
 630                 color = PERF_COLOR_RED;
 631         else if (ratio > 10.0)
 632                 color = PERF_COLOR_MAGENTA;
 633         else if (ratio > 5.0)
 634                 color = PERF_COLOR_YELLOW;
 635
 636         fprintf(output, " #  ");
 637         color_fprintf(output, color, "%6.2f%%", ratio);
 638         fprintf(output, " of all branches        ");
 639 }
 640
 641 static void print_l1_dcache_misses(int cpu, struct perf_evsel *evsel __used, double avg)
 642 {
 643         double total, ratio = 0.0;
 644         const char *color;
 645
 646         total = avg_stats(&runtime_l1_dcache_stats[cpu]);
 647
 648         if (total)
 649                 ratio = avg / total * 100.0;
 650
 651         color = PERF_COLOR_NORMAL;
 652         if (ratio > 20.0)
 653                 color = PERF_COLOR_RED;
 654         else if (ratio > 10.0)
 655                 color = PERF_COLOR_MAGENTA;
 656         else if (ratio > 5.0)
 657                 color = PERF_COLOR_YELLOW;
 658
 659         fprintf(output, " #  ");
 660         color_fprintf(output, color, "%6.2f%%", ratio);
 661         fprintf(output, " of all L1-dcache hits  ");
 662 }
 663
 664 static void print_l1_icache_misses(int cpu, struct perf_evsel *evsel __used, double avg)
 665 {
 666         double total, ratio = 0.0;
 667         const char *color;
 668
 669         total = avg_stats(&runtime_l1_icache_stats[cpu]);
 670
 671         if (total)
 672                 ratio = avg / total * 100.0;
 673
 674         color = PERF_COLOR_NORMAL;
 675         if (ratio > 20.0)
 676                 color = PERF_COLOR_RED;
 677         else if (ratio > 10.0)
 678                 color = PERF_COLOR_MAGENTA;
 679         else if (ratio > 5.0)
 680                 color = PERF_COLOR_YELLOW;
 681
 682         fprintf(output, " #  ");
 683         color_fprintf(output, color, "%6.2f%%", ratio);
 684         fprintf(output, " of all L1-icache hits  ");
 685 }
 686
 687 static void print_dtlb_cache_misses(int cpu, struct perf_evsel *evsel __used, double avg)
 688 {
 689         double total, ratio = 0.0;
 690         const char *color;
 691
 692         total = avg_stats(&runtime_dtlb_cache_stats[cpu]);
 693
 694         if (total)
 695                 ratio = avg / total * 100.0;
 696
 697         color = PERF_COLOR_NORMAL;
 698         if (ratio > 20.0)
 699                 color = PERF_COLOR_RED;
 700         else if (ratio > 10.0)
 701                 color = PERF_COLOR_MAGENTA;
 702         else if (ratio > 5.0)
 703                 color = PERF_COLOR_YELLOW;
 704
 705         fprintf(output, " #  ");
 706         color_fprintf(output, color, "%6.2f%%", ratio);
 707         fprintf(output, " of all dTLB cache hits ");
 708 }
 709
 710 static void print_itlb_cache_misses(int cpu, struct perf_evsel *evsel __used, double avg)
 711 {
 712         double total, ratio = 0.0;
 713         const char *color;
 714
 715         total = avg_stats(&runtime_itlb_cache_stats[cpu]);
 716
 717         if (total)
 718                 ratio = avg / total * 100.0;
 719
 720         color = PERF_COLOR_NORMAL;
 721         if (ratio > 20.0)
 722                 color = PERF_COLOR_RED;
 723         else if (ratio > 10.0)
 724                 color = PERF_COLOR_MAGENTA;
 725         else if (ratio > 5.0)
 726                 color = PERF_COLOR_YELLOW;
 727
 728         fprintf(output, " #  ");
 729         color_fprintf(output, color, "%6.2f%%", ratio);
 730         fprintf(output, " of all iTLB cache hits ");
 731 }
 732
 733 static void print_ll_cache_misses(int cpu, struct perf_evsel *evsel __used, double avg)
 734 {
 735         double total, ratio = 0.0;
 736         const char *color;
 737
 738         total = avg_stats(&runtime_ll_cache_stats[cpu]);
 739
 740         if (total)
 741                 ratio = avg / total * 100.0;
 742
 743         color = PERF_COLOR_NORMAL;
 744         if (ratio > 20.0)
 745                 color = PERF_COLOR_RED;
 746         else if (ratio > 10.0)
 747                 color = PERF_COLOR_MAGENTA;
 748         else if (ratio > 5.0)
 749                 color = PERF_COLOR_YELLOW;
 750
 751         fprintf(output, " #  ");
 752         color_fprintf(output, color, "%6.2f%%", ratio);
 753         fprintf(output, " of all LL-cache hits   ");
 754 }
 755
 756 static void abs_printout(int cpu, struct perf_evsel *evsel, double avg)
 757 {
 758         double total, ratio = 0.0;
 759         char cpustr[16] = { '\0', };
 760         const char *fmt;
 761
 762         if (csv_output)
 763                 fmt = "%s%.0f%s%s";
 764         else if (big_num)
 765                 fmt = "%s%'18.0f%s%-25s";
 766         else
 767                 fmt = "%s%18.0f%s%-25s";
 768
 769         if (no_aggr)
 770                 sprintf(cpustr, "CPU%*d%s",
 771                         csv_output ? 0 : -4,
 772                         evsel_list->cpus->map[cpu], csv_sep);
 773         else
 774                 cpu = 0;
 775
 776         fprintf(output, fmt, cpustr, avg, csv_sep, event_name(evsel));
 777
 778         if (evsel->cgrp)
 779                 fprintf(output, "%s%s", csv_sep, evsel->cgrp->name);
 780
 781         if (csv_output)
 782                 return;
 783
 784         if (perf_evsel__match(evsel, HARDWARE, HW_INSTRUCTIONS)) {
 785                 total = avg_stats(&runtime_cycles_stats[cpu]);
 786
 787                 if (total)
 788                         ratio = avg / total;
 789
 790                 fprintf(output, " #   %5.2f  insns per cycle        ", ratio);
 791
 792                 total = avg_stats(&runtime_stalled_cycles_front_stats[cpu]);
 793                 total = max(total, avg_stats(&runtime_stalled_cycles_back_stats[cpu]));
 794
 795                 if (total && avg) {
 796                         ratio = total / avg;
 797                         fprintf(output, "\n                                             #   %5.2f  stalled cycles per insn", ratio);
 798                 }
 799
 800         } else if (perf_evsel__match(evsel, HARDWARE, HW_BRANCH_MISSES) &&
 801                         runtime_branches_stats[cpu].n != 0) {
 802                 print_branch_misses(cpu, evsel, avg);
 803         } else if (
 804                 evsel->attr.type == PERF_TYPE_HW_CACHE &&
 805                 evsel->attr.config ==  ( PERF_COUNT_HW_CACHE_L1D |
 806                                         ((PERF_COUNT_HW_CACHE_OP_READ) << 8) |
 807                                         ((PERF_COUNT_HW_CACHE_RESULT_MISS) << 16)) &&
 808                         runtime_l1_dcache_stats[cpu].n != 0) {
 809                 print_l1_dcache_misses(cpu, evsel, avg);
 810         } else if (
 811                 evsel->attr.type == PERF_TYPE_HW_CACHE &&
 812                 evsel->attr.config ==  ( PERF_COUNT_HW_CACHE_L1I |
 813                                         ((PERF_COUNT_HW_CACHE_OP_READ) << 8) |
 814                                         ((PERF_COUNT_HW_CACHE_RESULT_MISS) << 16)) &&
 815                         runtime_l1_icache_stats[cpu].n != 0) {
 816                 print_l1_icache_misses(cpu, evsel, avg);
 817         } else if (
 818                 evsel->attr.type == PERF_TYPE_HW_CACHE &&
 819                 evsel->attr.config ==  ( PERF_COUNT_HW_CACHE_DTLB |
 820                                         ((PERF_COUNT_HW_CACHE_OP_READ) << 8) |
 821                                         ((PERF_COUNT_HW_CACHE_RESULT_MISS) << 16)) &&
 822                         runtime_dtlb_cache_stats[cpu].n != 0) {
 823                 print_dtlb_cache_misses(cpu, evsel, avg);
 824         } else if (
 825                 evsel->attr.type == PERF_TYPE_HW_CACHE &&
 826                 evsel->attr.config ==  ( PERF_COUNT_HW_CACHE_ITLB |
 827                                         ((PERF_COUNT_HW_CACHE_OP_READ) << 8) |
 828                                         ((PERF_COUNT_HW_CACHE_RESULT_MISS) << 16)) &&
 829                         runtime_itlb_cache_stats[cpu].n != 0) {
 830                 print_itlb_cache_misses(cpu, evsel, avg);
 831         } else if (
 832                 evsel->attr.type == PERF_TYPE_HW_CACHE &&
 833                 evsel->attr.config ==  ( PERF_COUNT_HW_CACHE_LL |
 834                                         ((PERF_COUNT_HW_CACHE_OP_READ) << 8) |
 835                                         ((PERF_COUNT_HW_CACHE_RESULT_MISS) << 16)) &&
 836                         runtime_ll_cache_stats[cpu].n != 0) {
 837                 print_ll_cache_misses(cpu, evsel, avg);
 838         } else if (perf_evsel__match(evsel, HARDWARE, HW_CACHE_MISSES) &&
 839                         runtime_cacherefs_stats[cpu].n != 0) {
 840                 total = avg_stats(&runtime_cacherefs_stats[cpu]);
 841
 842                 if (total)
 843                         ratio = avg * 100 / total;
 844
 845                 fprintf(output, " # %8.3f %% of all cache refs    ", ratio);
 846
 847         } else if (perf_evsel__match(evsel, HARDWARE, HW_STALLED_CYCLES_FRONTEND)) {
 848                 print_stalled_cycles_frontend(cpu, evsel, avg);
 849         } else if (perf_evsel__match(evsel, HARDWARE, HW_STALLED_CYCLES_BACKEND)) {
 850                 print_stalled_cycles_backend(cpu, evsel, avg);
 851         } else if (perf_evsel__match(evsel, HARDWARE, HW_CPU_CYCLES)) {
 852                 total = avg_stats(&runtime_nsecs_stats[cpu]);
 853
 854                 if (total)
 855                         ratio = 1.0 * avg / total;
 856
 857                 fprintf(output, " # %8.3f GHz                    ", ratio);
 858         } else if (runtime_nsecs_stats[cpu].n != 0) {
 859                 total = avg_stats(&runtime_nsecs_stats[cpu]);
 860
 861                 if (total)
 862                         ratio = 1000.0 * avg / total;
 863
 864                 fprintf(output, " # %8.3f M/sec                  ", ratio);
 865         } else {
 866                 fprintf(output, "                                   ");
 867         }
 868 }
 869
 870 /*
 871  * Print out the results of a single counter:
 872  * aggregated counts in system-wide mode
 873  */
 874 static void print_counter_aggr(struct perf_evsel *counter)
 875 {
 876         struct perf_stat *ps = counter->priv;
 877         double avg = avg_stats(&ps->res_stats[0]);
 878         int scaled = counter->counts->scaled;
 879
 880         if (scaled == -1) {
 881                 fprintf(output, "%*s%s%*s",
 882                         csv_output ? 0 : 18,
 883                         counter->supported ? CNTR_NOT_COUNTED : CNTR_NOT_SUPPORTED,
 884                         csv_sep,
 885                         csv_output ? 0 : -24,
 886                         event_name(counter));
 887
 888                 if (counter->cgrp)
 889                         fprintf(output, "%s%s", csv_sep, counter->cgrp->name);
 890
 891                 fputc('\n', output);
 892                 return;
 893         }
 894
 895         if (nsec_counter(counter))
 896                 nsec_printout(-1, counter, avg);
 897         else
 898                 abs_printout(-1, counter, avg);
 899
 900         print_noise(counter, avg);
 901
 902         if (csv_output) {
 903                 fputc('\n', output);
 904                 return;
 905         }
 906
 907         if (scaled) {
 908                 double avg_enabled, avg_running;
 909
 910                 avg_enabled = avg_stats(&ps->res_stats[1]);
 911                 avg_running = avg_stats(&ps->res_stats[2]);
 912
 913                 fprintf(output, " [%5.2f%%]", 100 * avg_running / avg_enabled);
 914         }
 915         fprintf(output, "\n");
 916 }
 917
 918 /*
 919  * Print out the results of a single counter:
 920  * does not use aggregated count in system-wide
 921  */
 922 static void print_counter(struct perf_evsel *counter)
 923 {
 924         u64 ena, run, val;
 925         int cpu;
 926
 927         for (cpu = 0; cpu < evsel_list->cpus->nr; cpu++) {
 928                 val = counter->counts->cpu[cpu].val;
 929                 ena = counter->counts->cpu[cpu].ena;
 930                 run = counter->counts->cpu[cpu].run;
 931                 if (run == 0 || ena == 0) {
 932                         fprintf(output, "CPU%*d%s%*s%s%*s",
 933                                 csv_output ? 0 : -4,
 934                                 evsel_list->cpus->map[cpu], csv_sep,
 935                                 csv_output ? 0 : 18,
 936                                 counter->supported ? CNTR_NOT_COUNTED : CNTR_NOT_SUPPORTED,
 937                                 csv_sep,
 938                                 csv_output ? 0 : -24,
 939                                 event_name(counter));
 940
 941                         if (counter->cgrp)
 942                                 fprintf(output, "%s%s",
 943                                         csv_sep, counter->cgrp->name);
 944
 945                         fputc('\n', output);
 946                         continue;
 947                 }
 948
 949                 if (nsec_counter(counter))
 950                         nsec_printout(cpu, counter, val);
 951                 else
 952                         abs_printout(cpu, counter, val);
 953
 954                 if (!csv_output) {
 955                         print_noise(counter, 1.0);
 956
 957                         if (run != ena)
 958                                 fprintf(output, "  (%.2f%%)",
 959                                         100.0 * run / ena);
 960                 }
 961                 fputc('\n', output);
 962         }
 963 }
 964
 965 static void print_stat(int argc, const char **argv)
 966 {
 967         struct perf_evsel *counter;
 968         int i;
 969
 970         fflush(stdout);
 971
 972         if (!csv_output) {
 973                 fprintf(output, "\n");
 974                 fprintf(output, " Performance counter stats for ");
 975                 if(target_pid == -1 && target_tid == -1) {
 976                         fprintf(output, "\'%s", argv[0]);
 977                         for (i = 1; i < argc; i++)
 978                                 fprintf(output, " %s", argv[i]);
 979                 } else if (target_pid != -1)
 980                         fprintf(output, "process id \'%d", target_pid);
 981                 else
 982                         fprintf(output, "thread id \'%d", target_tid);
 983
 984                 fprintf(output, "\'");
 985                 if (run_count > 1)
 986                         fprintf(output, " (%d runs)", run_count);
 987                 fprintf(output, ":\n\n");
 988         }
 989
 990         if (no_aggr) {
 991                 list_for_each_entry(counter, &evsel_list->entries, node)
 992                         print_counter(counter);
 993         } else {
 994                 list_for_each_entry(counter, &evsel_list->entries, node)
 995                         print_counter_aggr(counter);
 996         }
 997
 998         if (!csv_output) {
 999                 if (!null_run)
1000                         fprintf(output, "\n");
1001                 fprintf(output, " %17.9f seconds time elapsed",
1002                                 avg_stats(&walltime_nsecs_stats)/1e9);
1003                 if (run_count > 1) {
1004                         fprintf(output, "                                        ");
1005                         print_noise_pct(stddev_stats(&walltime_nsecs_stats),
1006                                         avg_stats(&walltime_nsecs_stats));
1007                 }
1008                 fprintf(output, "\n\n");
1009         }
1010 }
1011
1012 static volatile int signr = -1;
1013
1014 static void skip_signal(int signo)
1015 {
1016         if(child_pid == -1)
1017                 done = 1;
1018
1019         signr = signo;
1020 }
1021
1022 static void sig_atexit(void)
1023 {
1024         if (child_pid != -1)
1025                 kill(child_pid, SIGTERM);
1026
1027         if (signr == -1)
1028                 return;
1029
1030         signal(signr, SIG_DFL);
1031         kill(getpid(), signr);
1032 }
1033
1034 static const char * const stat_usage[] = {
1035         "perf stat [<options>] [<command>]",
1036         NULL
1037 };
1038
1039 static int stat__set_big_num(const struct option *opt __used,
1040                              const char *s __used, int unset)
1041 {
1042         big_num_opt = unset ? 0 : 1;
1043         return 0;
1044 }
1045
1046 static bool append_file;
1047
1048 static const struct option options[] = {
1049         OPT_CALLBACK('e', "event", &evsel_list, "event",
1050                      "event selector. use 'perf list' to list available events",
1051                      parse_events_option),
1052         OPT_CALLBACK(0, "filter", &evsel_list, "filter",
1053                      "event filter", parse_filter),
1054         OPT_BOOLEAN('i', "no-inherit", &no_inherit,
1055                     "child tasks do not inherit counters"),
1056         OPT_INTEGER('p', "pid", &target_pid,
1057                     "stat events on existing process id"),
1058         OPT_INTEGER('t', "tid", &target_tid,
1059                     "stat events on existing thread id"),
1060         OPT_BOOLEAN('a', "all-cpus", &system_wide,
1061                     "system-wide collection from all CPUs"),
1062         OPT_BOOLEAN('g', "group", &group,
1063                     "put the counters into a counter group"),
1064         OPT_BOOLEAN('c', "scale", &scale,
1065                     "scale/normalize counters"),
1066         OPT_INCR('v', "verbose", &verbose,
1067                     "be more verbose (show counter open errors, etc)"),
1068         OPT_INTEGER('r', "repeat", &run_count,
1069                     "repeat command and print average + stddev (max: 100)"),
1070         OPT_BOOLEAN('n', "null", &null_run,
1071                     "null run - dont start any counters"),
1072         OPT_INCR('d', "detailed", &detailed_run,
1073                     "detailed run - start a lot of events"),
1074         OPT_BOOLEAN('S', "sync", &sync_run,
1075                     "call sync() before starting a run"),
1076         OPT_CALLBACK_NOOPT('B', "big-num", NULL, NULL,
1077                            "print large numbers with thousands\' separators",
1078                            stat__set_big_num),
1079         OPT_STRING('C', "cpu", &cpu_list, "cpu",
1080                     "list of cpus to monitor in system-wide"),
1081         OPT_BOOLEAN('A', "no-aggr", &no_aggr,
1082                     "disable CPU count aggregation"),
1083         OPT_STRING('x', "field-separator", &csv_sep, "separator",
1084                    "print counts with custom separator"),
1085         OPT_CALLBACK('G', "cgroup", &evsel_list, "name",
1086                      "monitor event in cgroup name only",
1087                      parse_cgroups),
1088         OPT_STRING('o', "output", &output_name, "file",
1089                     "output file name"),
1090         OPT_BOOLEAN(0, "append", &append_file, "append to the output file"),
1091         OPT_INTEGER(0, "log-fd", &output_fd,
1092                     "log output to fd, instead of stderr"),
1093         OPT_END()
1094 };
1095
1096 /*
1097  * Add default attributes, if there were no attributes specified or
1098  * if -d/--detailed, -d -d or -d -d -d is used:
1099  */
1100 static int add_default_attributes(void)
1101 {
1102         struct perf_evsel *pos;
1103         size_t attr_nr = 0;
1104         size_t c;
1105
1106         /* Set attrs if no event is selected and !null_run: */
1107         if (null_run)
1108                 return 0;
1109
1110         if (!evsel_list->nr_entries) {
1111                 for (c = 0; c < ARRAY_SIZE(default_attrs); c++) {
1112                         pos = perf_evsel__new(default_attrs + c, c + attr_nr);
1113                         if (pos == NULL)
1114                                 return -1;
1115                         perf_evlist__add(evsel_list, pos);
1116                 }
1117                 attr_nr += c;
1118         }
1119
1120         /* Detailed events get appended to the event list: */
1121
1122         if (detailed_run <  1)
1123                 return 0;
1124
1125         /* Append detailed run extra attributes: */
1126         for (c = 0; c < ARRAY_SIZE(detailed_attrs); c++) {
1127                 pos = perf_evsel__new(detailed_attrs + c, c + attr_nr);
1128                 if (pos == NULL)
1129                         return -1;
1130                 perf_evlist__add(evsel_list, pos);
1131         }
1132         attr_nr += c;
1133
1134         if (detailed_run < 2)
1135                 return 0;
1136
1137         /* Append very detailed run extra attributes: */
1138         for (c = 0; c < ARRAY_SIZE(very_detailed_attrs); c++) {
1139                 pos = perf_evsel__new(very_detailed_attrs + c, c + attr_nr);
1140                 if (pos == NULL)
1141                         return -1;
1142                 perf_evlist__add(evsel_list, pos);
1143         }
1144
1145         if (detailed_run < 3)
1146                 return 0;
1147
1148         /* Append very, very detailed run extra attributes: */
1149         for (c = 0; c < ARRAY_SIZE(very_very_detailed_attrs); c++) {
1150                 pos = perf_evsel__new(very_very_detailed_attrs + c, c + attr_nr);
1151                 if (pos == NULL)
1152                         return -1;
1153                 perf_evlist__add(evsel_list, pos);
1154         }
1155
1156
1157         return 0;
1158 }
1159
1160 int cmd_stat(int argc, const char **argv, const char *prefix __used)
1161 {
1162         struct perf_evsel *pos;
1163         int status = -ENOMEM;
1164         const char *mode;
1165
1166         setlocale(LC_ALL, "");
1167
1168         evsel_list = perf_evlist__new(NULL, NULL);
1169         if (evsel_list == NULL)
1170                 return -ENOMEM;
1171
1172         argc = parse_options(argc, argv, options, stat_usage,
1173                 PARSE_OPT_STOP_AT_NON_OPTION);
1174
1175         output = stderr;
1176         if (output_name && strcmp(output_name, "-"))
1177                 output = NULL;
1178
1179         if (output_name && output_fd) {
1180                 fprintf(stderr, "cannot use both --output and --log-fd\n");
1181                 usage_with_options(stat_usage, options);
1182         }
1183         if (!output) {
1184                 struct timespec tm;
1185                 mode = append_file ? "a" : "w";
1186
1187                 output = fopen(output_name, mode);
1188                 if (!output) {
1189                         perror("failed to create output file");
1190                         exit(-1);
1191                 }
1192                 clock_gettime(CLOCK_REALTIME, &tm);
1193                 fprintf(output, "# started on %s\n", ctime(&tm.tv_sec));
1194         } else if (output_fd != 2) {
1195                 mode = append_file ? "a" : "w";
1196                 output = fdopen(output_fd, mode);
1197                 if (!output) {
1198                         perror("Failed opening logfd");
1199                         return -errno;
1200                 }
1201         }
1202
1203         if (csv_sep) {
1204                 csv_output = true;
1205                 if (!strcmp(csv_sep, "\\t"))
1206                         csv_sep = "\t";
1207         } else
1208                 csv_sep = DEFAULT_SEPARATOR;
1209
1210         /*
1211          * let the spreadsheet do the pretty-printing
1212          */
1213         if (csv_output) {
1214                 /* User explicitly passed -B? */
1215                 if (big_num_opt == 1) {
1216                         fprintf(stderr, "-B option not supported with -x\n");
1217                         usage_with_options(stat_usage, options);
1218                 } else /* Nope, so disable big number formatting */
1219                         big_num = false;
1220         } else if (big_num_opt == 0) /* User passed --no-big-num */
1221                 big_num = false;
1222
1223         if (!argc && target_pid == -1 && target_tid == -1)
1224                 usage_with_options(stat_usage, options);
1225         if (run_count <= 0)
1226                 usage_with_options(stat_usage, options);
1227
1228         /* no_aggr, cgroup are for system-wide only */
1229         if ((no_aggr || nr_cgroups) && !system_wide) {
1230                 fprintf(stderr, "both cgroup and no-aggregation "
1231                         "modes only available in system-wide mode\n");
1232
1233                 usage_with_options(stat_usage, options);
1234         }
1235
1236         if (add_default_attributes())
1237                 goto out;
1238
1239         if (target_pid != -1)
1240                 target_tid = target_pid;
1241
1242         evsel_list->threads = thread_map__new(target_pid, target_tid);
1243         if (evsel_list->threads == NULL) {
1244                 pr_err("Problems finding threads of monitor\n");
1245                 usage_with_options(stat_usage, options);
1246         }
1247
1248         if (system_wide)
1249                 evsel_list->cpus = cpu_map__new(cpu_list);
1250         else
1251                 evsel_list->cpus = cpu_map__dummy_new();
1252
1253         if (evsel_list->cpus == NULL) {
1254                 perror("failed to parse CPUs map");
1255                 usage_with_options(stat_usage, options);
1256                 return -1;
1257         }
1258
1259         list_for_each_entry(pos, &evsel_list->entries, node) {
1260                 if (perf_evsel__alloc_stat_priv(pos) < 0 ||
1261                     perf_evsel__alloc_counts(pos, evsel_list->cpus->nr) < 0 ||
1262                     perf_evsel__alloc_fd(pos, evsel_list->cpus->nr, evsel_list->threads->nr) < 0)
1263                         goto out_free_fd;
1264         }
1265
1266         /*
1267          * We dont want to block the signals - that would cause
1268          * child tasks to inherit that and Ctrl-C would not work.
1269          * What we want is for Ctrl-C to work in the exec()-ed
1270          * task, but being ignored by perf stat itself:
1271          */
1272         atexit(sig_atexit);
1273         signal(SIGINT,  skip_signal);
1274         signal(SIGALRM, skip_signal);
1275         signal(SIGABRT, skip_signal);
1276
1277         status = 0;
1278         for (run_idx = 0; run_idx < run_count; run_idx++) {
1279                 if (run_count != 1 && verbose)
1280                         fprintf(output, "[ perf stat: executing run #%d ... ]\n",
1281                                 run_idx + 1);
1282
1283                 if (sync_run)
1284                         sync();
1285
1286                 status = run_perf_stat(argc, argv);
1287         }
1288
1289         if (status != -1)
1290                 print_stat(argc, argv);
1291 out_free_fd:
1292         list_for_each_entry(pos, &evsel_list->entries, node)
1293                 perf_evsel__free_stat_priv(pos);
1294         perf_evlist__delete_maps(evsel_list);
1295 out:
1296         perf_evlist__delete(evsel_list);
1297         return status;
1298 }