linux/tools/perf/builtin-stat.c
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   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
  67static 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 */
  86static 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 */
 116static 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 */
 159static 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
 176static struct perf_evlist       *evsel_list;
 177
 178static struct perf_target       target = {
 179        .uid    = UINT_MAX,
 180};
 181
 182static int                      run_idx                         =  0;
 183static int                      run_count                       =  1;
 184static bool                     no_inherit                      = false;
 185static bool                     scale                           =  true;
 186static bool                     no_aggr                         = false;
 187static pid_t                    child_pid                       = -1;
 188static bool                     null_run                        =  false;
 189static int                      detailed_run                    =  0;
 190static bool                     sync_run                        =  false;
 191static bool                     big_num                         =  true;
 192static int                      big_num_opt                     =  -1;
 193static const char               *csv_sep                        = NULL;
 194static bool                     csv_output                      = false;
 195static bool                     group                           = false;
 196static const char               *output_name                    = NULL;
 197static FILE                     *output                         = NULL;
 198static int                      output_fd;
 199
 200static volatile int done = 0;
 201
 202struct stats
 203{
 204        double n, mean, M2;
 205};
 206
 207struct perf_stat {
 208        struct stats      res_stats[3];
 209};
 210
 211static int perf_evsel__alloc_stat_priv(struct perf_evsel *evsel)
 212{
 213        evsel->priv = zalloc(sizeof(struct perf_stat));
 214        return evsel->priv == NULL ? -ENOMEM : 0;
 215}
 216
 217static void perf_evsel__free_stat_priv(struct perf_evsel *evsel)
 218{
 219        free(evsel->priv);
 220        evsel->priv = NULL;
 221}
 222
 223static void update_stats(struct stats *stats, u64 val)
 224{
 225        double delta;
 226
 227        stats->n++;
 228        delta = val - stats->mean;
 229        stats->mean += delta / stats->n;
 230        stats->M2 += delta*(val - stats->mean);
 231}
 232
 233static double avg_stats(struct stats *stats)
 234{
 235        return stats->mean;
 236}
 237
 238/*
 239 * http://en.wikipedia.org/wiki/Algorithms_for_calculating_variance
 240 *
 241 *       (\Sum n_i^2) - ((\Sum n_i)^2)/n
 242 * s^2 = -------------------------------
 243 *                  n - 1
 244 *
 245 * http://en.wikipedia.org/wiki/Stddev
 246 *
 247 * The std dev of the mean is related to the std dev by:
 248 *
 249 *             s
 250 * s_mean = -------
 251 *          sqrt(n)
 252 *
 253 */
 254static double stddev_stats(struct stats *stats)
 255{
 256        double variance, variance_mean;
 257
 258        if (!stats->n)
 259                return 0.0;
 260
 261        variance = stats->M2 / (stats->n - 1);
 262        variance_mean = variance / stats->n;
 263
 264        return sqrt(variance_mean);
 265}
 266
 267static struct stats runtime_nsecs_stats[MAX_NR_CPUS];
 268static struct stats runtime_cycles_stats[MAX_NR_CPUS];
 269static struct stats runtime_stalled_cycles_front_stats[MAX_NR_CPUS];
 270static struct stats runtime_stalled_cycles_back_stats[MAX_NR_CPUS];
 271static struct stats runtime_branches_stats[MAX_NR_CPUS];
 272static struct stats runtime_cacherefs_stats[MAX_NR_CPUS];
 273static struct stats runtime_l1_dcache_stats[MAX_NR_CPUS];
 274static struct stats runtime_l1_icache_stats[MAX_NR_CPUS];
 275static struct stats runtime_ll_cache_stats[MAX_NR_CPUS];
 276static struct stats runtime_itlb_cache_stats[MAX_NR_CPUS];
 277static struct stats runtime_dtlb_cache_stats[MAX_NR_CPUS];
 278static struct stats walltime_nsecs_stats;
 279
 280static int create_perf_stat_counter(struct perf_evsel *evsel,
 281                                    struct perf_evsel *first)
 282{
 283        struct perf_event_attr *attr = &evsel->attr;
 284        struct xyarray *group_fd = NULL;
 285        bool exclude_guest_missing = false;
 286        int ret;
 287
 288        if (group && evsel != first)
 289                group_fd = first->fd;
 290
 291        if (scale)
 292                attr->read_format = PERF_FORMAT_TOTAL_TIME_ENABLED |
 293                                    PERF_FORMAT_TOTAL_TIME_RUNNING;
 294
 295        attr->inherit = !no_inherit;
 296
 297retry:
 298        if (exclude_guest_missing)
 299                evsel->attr.exclude_guest = evsel->attr.exclude_host = 0;
 300
 301        if (perf_target__has_cpu(&target)) {
 302                ret = perf_evsel__open_per_cpu(evsel, evsel_list->cpus,
 303                                               group, group_fd);
 304                if (ret)
 305                        goto check_ret;
 306                return 0;
 307        }
 308
 309        if (!perf_target__has_task(&target) && (!group || evsel == first)) {
 310                attr->disabled = 1;
 311                attr->enable_on_exec = 1;
 312        }
 313
 314        ret = perf_evsel__open_per_thread(evsel, evsel_list->threads,
 315                                          group, group_fd);
 316        if (!ret)
 317                return 0;
 318        /* fall through */
 319check_ret:
 320        if (ret && errno == EINVAL) {
 321                if (!exclude_guest_missing &&
 322                    (evsel->attr.exclude_guest || evsel->attr.exclude_host)) {
 323                        pr_debug("Old kernel, cannot exclude "
 324                                 "guest or host samples.\n");
 325                        exclude_guest_missing = true;
 326                        goto retry;
 327                }
 328        }
 329        return ret;
 330}
 331
 332/*
 333 * Does the counter have nsecs as a unit?
 334 */
 335static inline int nsec_counter(struct perf_evsel *evsel)
 336{
 337        if (perf_evsel__match(evsel, SOFTWARE, SW_CPU_CLOCK) ||
 338            perf_evsel__match(evsel, SOFTWARE, SW_TASK_CLOCK))
 339                return 1;
 340
 341        return 0;
 342}
 343
 344/*
 345 * Update various tracking values we maintain to print
 346 * more semantic information such as miss/hit ratios,
 347 * instruction rates, etc:
 348 */
 349static void update_shadow_stats(struct perf_evsel *counter, u64 *count)
 350{
 351        if (perf_evsel__match(counter, SOFTWARE, SW_TASK_CLOCK))
 352                update_stats(&runtime_nsecs_stats[0], count[0]);
 353        else if (perf_evsel__match(counter, HARDWARE, HW_CPU_CYCLES))
 354                update_stats(&runtime_cycles_stats[0], count[0]);
 355        else if (perf_evsel__match(counter, HARDWARE, HW_STALLED_CYCLES_FRONTEND))
 356                update_stats(&runtime_stalled_cycles_front_stats[0], count[0]);
 357        else if (perf_evsel__match(counter, HARDWARE, HW_STALLED_CYCLES_BACKEND))
 358                update_stats(&runtime_stalled_cycles_back_stats[0], count[0]);
 359        else if (perf_evsel__match(counter, HARDWARE, HW_BRANCH_INSTRUCTIONS))
 360                update_stats(&runtime_branches_stats[0], count[0]);
 361        else if (perf_evsel__match(counter, HARDWARE, HW_CACHE_REFERENCES))
 362                update_stats(&runtime_cacherefs_stats[0], count[0]);
 363        else if (perf_evsel__match(counter, HW_CACHE, HW_CACHE_L1D))
 364                update_stats(&runtime_l1_dcache_stats[0], count[0]);
 365        else if (perf_evsel__match(counter, HW_CACHE, HW_CACHE_L1I))
 366                update_stats(&runtime_l1_icache_stats[0], count[0]);
 367        else if (perf_evsel__match(counter, HW_CACHE, HW_CACHE_LL))
 368                update_stats(&runtime_ll_cache_stats[0], count[0]);
 369        else if (perf_evsel__match(counter, HW_CACHE, HW_CACHE_DTLB))
 370                update_stats(&runtime_dtlb_cache_stats[0], count[0]);
 371        else if (perf_evsel__match(counter, HW_CACHE, HW_CACHE_ITLB))
 372                update_stats(&runtime_itlb_cache_stats[0], count[0]);
 373}
 374
 375/*
 376 * Read out the results of a single counter:
 377 * aggregate counts across CPUs in system-wide mode
 378 */
 379static int read_counter_aggr(struct perf_evsel *counter)
 380{
 381        struct perf_stat *ps = counter->priv;
 382        u64 *count = counter->counts->aggr.values;
 383        int i;
 384
 385        if (__perf_evsel__read(counter, evsel_list->cpus->nr,
 386                               evsel_list->threads->nr, scale) < 0)
 387                return -1;
 388
 389        for (i = 0; i < 3; i++)
 390                update_stats(&ps->res_stats[i], count[i]);
 391
 392        if (verbose) {
 393                fprintf(output, "%s: %" PRIu64 " %" PRIu64 " %" PRIu64 "\n",
 394                        perf_evsel__name(counter), count[0], count[1], count[2]);
 395        }
 396
 397        /*
 398         * Save the full runtime - to allow normalization during printout:
 399         */
 400        update_shadow_stats(counter, count);
 401
 402        return 0;
 403}
 404
 405/*
 406 * Read out the results of a single counter:
 407 * do not aggregate counts across CPUs in system-wide mode
 408 */
 409static int read_counter(struct perf_evsel *counter)
 410{
 411        u64 *count;
 412        int cpu;
 413
 414        for (cpu = 0; cpu < evsel_list->cpus->nr; cpu++) {
 415                if (__perf_evsel__read_on_cpu(counter, cpu, 0, scale) < 0)
 416                        return -1;
 417
 418                count = counter->counts->cpu[cpu].values;
 419
 420                update_shadow_stats(counter, count);
 421        }
 422
 423        return 0;
 424}
 425
 426static int run_perf_stat(int argc __used, const char **argv)
 427{
 428        unsigned long long t0, t1;
 429        struct perf_evsel *counter, *first;
 430        int status = 0;
 431        int child_ready_pipe[2], go_pipe[2];
 432        const bool forks = (argc > 0);
 433        char buf;
 434
 435        if (forks && (pipe(child_ready_pipe) < 0 || pipe(go_pipe) < 0)) {
 436                perror("failed to create pipes");
 437                exit(1);
 438        }
 439
 440        if (forks) {
 441                if ((child_pid = fork()) < 0)
 442                        perror("failed to fork");
 443
 444                if (!child_pid) {
 445                        close(child_ready_pipe[0]);
 446                        close(go_pipe[1]);
 447                        fcntl(go_pipe[0], F_SETFD, FD_CLOEXEC);
 448
 449                        /*
 450                         * Do a dummy execvp to get the PLT entry resolved,
 451                         * so we avoid the resolver overhead on the real
 452                         * execvp call.
 453                         */
 454                        execvp("", (char **)argv);
 455
 456                        /*
 457                         * Tell the parent we're ready to go
 458                         */
 459                        close(child_ready_pipe[1]);
 460
 461                        /*
 462                         * Wait until the parent tells us to go.
 463                         */
 464                        if (read(go_pipe[0], &buf, 1) == -1)
 465                                perror("unable to read pipe");
 466
 467                        execvp(argv[0], (char **)argv);
 468
 469                        perror(argv[0]);
 470                        exit(-1);
 471                }
 472
 473                if (perf_target__none(&target))
 474                        evsel_list->threads->map[0] = child_pid;
 475
 476                /*
 477                 * Wait for the child to be ready to exec.
 478                 */
 479                close(child_ready_pipe[1]);
 480                close(go_pipe[0]);
 481                if (read(child_ready_pipe[0], &buf, 1) == -1)
 482                        perror("unable to read pipe");
 483                close(child_ready_pipe[0]);
 484        }
 485
 486        first = list_entry(evsel_list->entries.next, struct perf_evsel, node);
 487
 488        list_for_each_entry(counter, &evsel_list->entries, node) {
 489                if (create_perf_stat_counter(counter, first) < 0) {
 490                        /*
 491                         * PPC returns ENXIO for HW counters until 2.6.37
 492                         * (behavior changed with commit b0a873e).
 493                         */
 494                        if (errno == EINVAL || errno == ENOSYS ||
 495                            errno == ENOENT || errno == EOPNOTSUPP ||
 496                            errno == ENXIO) {
 497                                if (verbose)
 498                                        ui__warning("%s event is not supported by the kernel.\n",
 499                                                    perf_evsel__name(counter));
 500                                counter->supported = false;
 501                                continue;
 502                        }
 503
 504                        if (errno == EPERM || errno == EACCES) {
 505                                error("You may not have permission to collect %sstats.\n"
 506                                      "\t Consider tweaking"
 507                                      " /proc/sys/kernel/perf_event_paranoid or running as root.",
 508                                      target.system_wide ? "system-wide " : "");
 509                        } else {
 510                                error("open_counter returned with %d (%s). "
 511                                      "/bin/dmesg may provide additional information.\n",
 512                                       errno, strerror(errno));
 513                        }
 514                        if (child_pid != -1)
 515                                kill(child_pid, SIGTERM);
 516                        die("Not all events could be opened.\n");
 517                        return -1;
 518                }
 519                counter->supported = true;
 520        }
 521
 522        if (perf_evlist__set_filters(evsel_list)) {
 523                error("failed to set filter with %d (%s)\n", errno,
 524                        strerror(errno));
 525                return -1;
 526        }
 527
 528        /*
 529         * Enable counters and exec the command:
 530         */
 531        t0 = rdclock();
 532
 533        if (forks) {
 534                close(go_pipe[1]);
 535                wait(&status);
 536                if (WIFSIGNALED(status))
 537                        psignal(WTERMSIG(status), argv[0]);
 538        } else {
 539                while(!done) sleep(1);
 540        }
 541
 542        t1 = rdclock();
 543
 544        update_stats(&walltime_nsecs_stats, t1 - t0);
 545
 546        if (no_aggr) {
 547                list_for_each_entry(counter, &evsel_list->entries, node) {
 548                        read_counter(counter);
 549                        perf_evsel__close_fd(counter, evsel_list->cpus->nr, 1);
 550                }
 551        } else {
 552                list_for_each_entry(counter, &evsel_list->entries, node) {
 553                        read_counter_aggr(counter);
 554                        perf_evsel__close_fd(counter, evsel_list->cpus->nr,
 555                                             evsel_list->threads->nr);
 556                }
 557        }
 558
 559        return WEXITSTATUS(status);
 560}
 561
 562static void print_noise_pct(double total, double avg)
 563{
 564        double pct = 0.0;
 565
 566        if (avg)
 567                pct = 100.0*total/avg;
 568
 569        if (csv_output)
 570                fprintf(output, "%s%.2f%%", csv_sep, pct);
 571        else if (pct)
 572                fprintf(output, "  ( +-%6.2f%% )", pct);
 573}
 574
 575static void print_noise(struct perf_evsel *evsel, double avg)
 576{
 577        struct perf_stat *ps;
 578
 579        if (run_count == 1)
 580                return;
 581
 582        ps = evsel->priv;
 583        print_noise_pct(stddev_stats(&ps->res_stats[0]), avg);
 584}
 585
 586static void nsec_printout(int cpu, struct perf_evsel *evsel, double avg)
 587{
 588        double msecs = avg / 1e6;
 589        char cpustr[16] = { '\0', };
 590        const char *fmt = csv_output ? "%s%.6f%s%s" : "%s%18.6f%s%-25s";
 591
 592        if (no_aggr)
 593                sprintf(cpustr, "CPU%*d%s",
 594                        csv_output ? 0 : -4,
 595                        evsel_list->cpus->map[cpu], csv_sep);
 596
 597        fprintf(output, fmt, cpustr, msecs, csv_sep, perf_evsel__name(evsel));
 598
 599        if (evsel->cgrp)
 600                fprintf(output, "%s%s", csv_sep, evsel->cgrp->name);
 601
 602        if (csv_output)
 603                return;
 604
 605        if (perf_evsel__match(evsel, SOFTWARE, SW_TASK_CLOCK))
 606                fprintf(output, " # %8.3f CPUs utilized          ",
 607                        avg / avg_stats(&walltime_nsecs_stats));
 608        else
 609                fprintf(output, "                                   ");
 610}
 611
 612/* used for get_ratio_color() */
 613enum grc_type {
 614        GRC_STALLED_CYCLES_FE,
 615        GRC_STALLED_CYCLES_BE,
 616        GRC_CACHE_MISSES,
 617        GRC_MAX_NR
 618};
 619
 620static const char *get_ratio_color(enum grc_type type, double ratio)
 621{
 622        static const double grc_table[GRC_MAX_NR][3] = {
 623                [GRC_STALLED_CYCLES_FE] = { 50.0, 30.0, 10.0 },
 624                [GRC_STALLED_CYCLES_BE] = { 75.0, 50.0, 20.0 },
 625                [GRC_CACHE_MISSES]      = { 20.0, 10.0, 5.0 },
 626        };
 627        const char *color = PERF_COLOR_NORMAL;
 628
 629        if (ratio > grc_table[type][0])
 630                color = PERF_COLOR_RED;
 631        else if (ratio > grc_table[type][1])
 632                color = PERF_COLOR_MAGENTA;
 633        else if (ratio > grc_table[type][2])
 634                color = PERF_COLOR_YELLOW;
 635
 636        return color;
 637}
 638
 639static void print_stalled_cycles_frontend(int cpu, struct perf_evsel *evsel __used, double avg)
 640{
 641        double total, ratio = 0.0;
 642        const char *color;
 643
 644        total = avg_stats(&runtime_cycles_stats[cpu]);
 645
 646        if (total)
 647                ratio = avg / total * 100.0;
 648
 649        color = get_ratio_color(GRC_STALLED_CYCLES_FE, ratio);
 650
 651        fprintf(output, " #  ");
 652        color_fprintf(output, color, "%6.2f%%", ratio);
 653        fprintf(output, " frontend cycles idle   ");
 654}
 655
 656static void print_stalled_cycles_backend(int cpu, struct perf_evsel *evsel __used, double avg)
 657{
 658        double total, ratio = 0.0;
 659        const char *color;
 660
 661        total = avg_stats(&runtime_cycles_stats[cpu]);
 662
 663        if (total)
 664                ratio = avg / total * 100.0;
 665
 666        color = get_ratio_color(GRC_STALLED_CYCLES_BE, ratio);
 667
 668        fprintf(output, " #  ");
 669        color_fprintf(output, color, "%6.2f%%", ratio);
 670        fprintf(output, " backend  cycles idle   ");
 671}
 672
 673static void print_branch_misses(int cpu, struct perf_evsel *evsel __used, double avg)
 674{
 675        double total, ratio = 0.0;
 676        const char *color;
 677
 678        total = avg_stats(&runtime_branches_stats[cpu]);
 679
 680        if (total)
 681                ratio = avg / total * 100.0;
 682
 683        color = get_ratio_color(GRC_CACHE_MISSES, ratio);
 684
 685        fprintf(output, " #  ");
 686        color_fprintf(output, color, "%6.2f%%", ratio);
 687        fprintf(output, " of all branches        ");
 688}
 689
 690static void print_l1_dcache_misses(int cpu, struct perf_evsel *evsel __used, double avg)
 691{
 692        double total, ratio = 0.0;
 693        const char *color;
 694
 695        total = avg_stats(&runtime_l1_dcache_stats[cpu]);
 696
 697        if (total)
 698                ratio = avg / total * 100.0;
 699
 700        color = get_ratio_color(GRC_CACHE_MISSES, ratio);
 701
 702        fprintf(output, " #  ");
 703        color_fprintf(output, color, "%6.2f%%", ratio);
 704        fprintf(output, " of all L1-dcache hits  ");
 705}
 706
 707static void print_l1_icache_misses(int cpu, struct perf_evsel *evsel __used, double avg)
 708{
 709        double total, ratio = 0.0;
 710        const char *color;
 711
 712        total = avg_stats(&runtime_l1_icache_stats[cpu]);
 713
 714        if (total)
 715                ratio = avg / total * 100.0;
 716
 717        color = get_ratio_color(GRC_CACHE_MISSES, ratio);
 718
 719        fprintf(output, " #  ");
 720        color_fprintf(output, color, "%6.2f%%", ratio);
 721        fprintf(output, " of all L1-icache hits  ");
 722}
 723
 724static void print_dtlb_cache_misses(int cpu, struct perf_evsel *evsel __used, double avg)
 725{
 726        double total, ratio = 0.0;
 727        const char *color;
 728
 729        total = avg_stats(&runtime_dtlb_cache_stats[cpu]);
 730
 731        if (total)
 732                ratio = avg / total * 100.0;
 733
 734        color = get_ratio_color(GRC_CACHE_MISSES, ratio);
 735
 736        fprintf(output, " #  ");
 737        color_fprintf(output, color, "%6.2f%%", ratio);
 738        fprintf(output, " of all dTLB cache hits ");
 739}
 740
 741static void print_itlb_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_itlb_cache_stats[cpu]);
 747
 748        if (total)
 749                ratio = avg / total * 100.0;
 750
 751        color = get_ratio_color(GRC_CACHE_MISSES, ratio);
 752
 753        fprintf(output, " #  ");
 754        color_fprintf(output, color, "%6.2f%%", ratio);
 755        fprintf(output, " of all iTLB cache hits ");
 756}
 757
 758static void print_ll_cache_misses(int cpu, struct perf_evsel *evsel __used, double avg)
 759{
 760        double total, ratio = 0.0;
 761        const char *color;
 762
 763        total = avg_stats(&runtime_ll_cache_stats[cpu]);
 764
 765        if (total)
 766                ratio = avg / total * 100.0;
 767
 768        color = get_ratio_color(GRC_CACHE_MISSES, ratio);
 769
 770        fprintf(output, " #  ");
 771        color_fprintf(output, color, "%6.2f%%", ratio);
 772        fprintf(output, " of all LL-cache hits   ");
 773}
 774
 775static void abs_printout(int cpu, struct perf_evsel *evsel, double avg)
 776{
 777        double total, ratio = 0.0;
 778        char cpustr[16] = { '\0', };
 779        const char *fmt;
 780
 781        if (csv_output)
 782                fmt = "%s%.0f%s%s";
 783        else if (big_num)
 784                fmt = "%s%'18.0f%s%-25s";
 785        else
 786                fmt = "%s%18.0f%s%-25s";
 787
 788        if (no_aggr)
 789                sprintf(cpustr, "CPU%*d%s",
 790                        csv_output ? 0 : -4,
 791                        evsel_list->cpus->map[cpu], csv_sep);
 792        else
 793                cpu = 0;
 794
 795        fprintf(output, fmt, cpustr, avg, csv_sep, perf_evsel__name(evsel));
 796
 797        if (evsel->cgrp)
 798                fprintf(output, "%s%s", csv_sep, evsel->cgrp->name);
 799
 800        if (csv_output)
 801                return;
 802
 803        if (perf_evsel__match(evsel, HARDWARE, HW_INSTRUCTIONS)) {
 804                total = avg_stats(&runtime_cycles_stats[cpu]);
 805
 806                if (total)
 807                        ratio = avg / total;
 808
 809                fprintf(output, " #   %5.2f  insns per cycle        ", ratio);
 810
 811                total = avg_stats(&runtime_stalled_cycles_front_stats[cpu]);
 812                total = max(total, avg_stats(&runtime_stalled_cycles_back_stats[cpu]));
 813
 814                if (total && avg) {
 815                        ratio = total / avg;
 816                        fprintf(output, "\n                                             #   %5.2f  stalled cycles per insn", ratio);
 817                }
 818
 819        } else if (perf_evsel__match(evsel, HARDWARE, HW_BRANCH_MISSES) &&
 820                        runtime_branches_stats[cpu].n != 0) {
 821                print_branch_misses(cpu, evsel, avg);
 822        } else if (
 823                evsel->attr.type == PERF_TYPE_HW_CACHE &&
 824                evsel->attr.config ==  ( PERF_COUNT_HW_CACHE_L1D |
 825                                        ((PERF_COUNT_HW_CACHE_OP_READ) << 8) |
 826                                        ((PERF_COUNT_HW_CACHE_RESULT_MISS) << 16)) &&
 827                        runtime_l1_dcache_stats[cpu].n != 0) {
 828                print_l1_dcache_misses(cpu, evsel, avg);
 829        } else if (
 830                evsel->attr.type == PERF_TYPE_HW_CACHE &&
 831                evsel->attr.config ==  ( PERF_COUNT_HW_CACHE_L1I |
 832                                        ((PERF_COUNT_HW_CACHE_OP_READ) << 8) |
 833                                        ((PERF_COUNT_HW_CACHE_RESULT_MISS) << 16)) &&
 834                        runtime_l1_icache_stats[cpu].n != 0) {
 835                print_l1_icache_misses(cpu, evsel, avg);
 836        } else if (
 837                evsel->attr.type == PERF_TYPE_HW_CACHE &&
 838                evsel->attr.config ==  ( PERF_COUNT_HW_CACHE_DTLB |
 839                                        ((PERF_COUNT_HW_CACHE_OP_READ) << 8) |
 840                                        ((PERF_COUNT_HW_CACHE_RESULT_MISS) << 16)) &&
 841                        runtime_dtlb_cache_stats[cpu].n != 0) {
 842                print_dtlb_cache_misses(cpu, evsel, avg);
 843        } else if (
 844                evsel->attr.type == PERF_TYPE_HW_CACHE &&
 845                evsel->attr.config ==  ( PERF_COUNT_HW_CACHE_ITLB |
 846                                        ((PERF_COUNT_HW_CACHE_OP_READ) << 8) |
 847                                        ((PERF_COUNT_HW_CACHE_RESULT_MISS) << 16)) &&
 848                        runtime_itlb_cache_stats[cpu].n != 0) {
 849                print_itlb_cache_misses(cpu, evsel, avg);
 850        } else if (
 851                evsel->attr.type == PERF_TYPE_HW_CACHE &&
 852                evsel->attr.config ==  ( PERF_COUNT_HW_CACHE_LL |
 853                                        ((PERF_COUNT_HW_CACHE_OP_READ) << 8) |
 854                                        ((PERF_COUNT_HW_CACHE_RESULT_MISS) << 16)) &&
 855                        runtime_ll_cache_stats[cpu].n != 0) {
 856                print_ll_cache_misses(cpu, evsel, avg);
 857        } else if (perf_evsel__match(evsel, HARDWARE, HW_CACHE_MISSES) &&
 858                        runtime_cacherefs_stats[cpu].n != 0) {
 859                total = avg_stats(&runtime_cacherefs_stats[cpu]);
 860
 861                if (total)
 862                        ratio = avg * 100 / total;
 863
 864                fprintf(output, " # %8.3f %% of all cache refs    ", ratio);
 865
 866        } else if (perf_evsel__match(evsel, HARDWARE, HW_STALLED_CYCLES_FRONTEND)) {
 867                print_stalled_cycles_frontend(cpu, evsel, avg);
 868        } else if (perf_evsel__match(evsel, HARDWARE, HW_STALLED_CYCLES_BACKEND)) {
 869                print_stalled_cycles_backend(cpu, evsel, avg);
 870        } else if (perf_evsel__match(evsel, HARDWARE, HW_CPU_CYCLES)) {
 871                total = avg_stats(&runtime_nsecs_stats[cpu]);
 872
 873                if (total)
 874                        ratio = 1.0 * avg / total;
 875
 876                fprintf(output, " # %8.3f GHz                    ", ratio);
 877        } else if (runtime_nsecs_stats[cpu].n != 0) {
 878                char unit = 'M';
 879
 880                total = avg_stats(&runtime_nsecs_stats[cpu]);
 881
 882                if (total)
 883                        ratio = 1000.0 * avg / total;
 884                if (ratio < 0.001) {
 885                        ratio *= 1000;
 886                        unit = 'K';
 887                }
 888
 889                fprintf(output, " # %8.3f %c/sec                  ", ratio, unit);
 890        } else {
 891                fprintf(output, "                                   ");
 892        }
 893}
 894
 895/*
 896 * Print out the results of a single counter:
 897 * aggregated counts in system-wide mode
 898 */
 899static void print_counter_aggr(struct perf_evsel *counter)
 900{
 901        struct perf_stat *ps = counter->priv;
 902        double avg = avg_stats(&ps->res_stats[0]);
 903        int scaled = counter->counts->scaled;
 904
 905        if (scaled == -1) {
 906                fprintf(output, "%*s%s%*s",
 907                        csv_output ? 0 : 18,
 908                        counter->supported ? CNTR_NOT_COUNTED : CNTR_NOT_SUPPORTED,
 909                        csv_sep,
 910                        csv_output ? 0 : -24,
 911                        perf_evsel__name(counter));
 912
 913                if (counter->cgrp)
 914                        fprintf(output, "%s%s", csv_sep, counter->cgrp->name);
 915
 916                fputc('\n', output);
 917                return;
 918        }
 919
 920        if (nsec_counter(counter))
 921                nsec_printout(-1, counter, avg);
 922        else
 923                abs_printout(-1, counter, avg);
 924
 925        print_noise(counter, avg);
 926
 927        if (csv_output) {
 928                fputc('\n', output);
 929                return;
 930        }
 931
 932        if (scaled) {
 933                double avg_enabled, avg_running;
 934
 935                avg_enabled = avg_stats(&ps->res_stats[1]);
 936                avg_running = avg_stats(&ps->res_stats[2]);
 937
 938                fprintf(output, " [%5.2f%%]", 100 * avg_running / avg_enabled);
 939        }
 940        fprintf(output, "\n");
 941}
 942
 943/*
 944 * Print out the results of a single counter:
 945 * does not use aggregated count in system-wide
 946 */
 947static void print_counter(struct perf_evsel *counter)
 948{
 949        u64 ena, run, val;
 950        int cpu;
 951
 952        for (cpu = 0; cpu < evsel_list->cpus->nr; cpu++) {
 953                val = counter->counts->cpu[cpu].val;
 954                ena = counter->counts->cpu[cpu].ena;
 955                run = counter->counts->cpu[cpu].run;
 956                if (run == 0 || ena == 0) {
 957                        fprintf(output, "CPU%*d%s%*s%s%*s",
 958                                csv_output ? 0 : -4,
 959                                evsel_list->cpus->map[cpu], csv_sep,
 960                                csv_output ? 0 : 18,
 961                                counter->supported ? CNTR_NOT_COUNTED : CNTR_NOT_SUPPORTED,
 962                                csv_sep,
 963                                csv_output ? 0 : -24,
 964                                perf_evsel__name(counter));
 965
 966                        if (counter->cgrp)
 967                                fprintf(output, "%s%s",
 968                                        csv_sep, counter->cgrp->name);
 969
 970                        fputc('\n', output);
 971                        continue;
 972                }
 973
 974                if (nsec_counter(counter))
 975                        nsec_printout(cpu, counter, val);
 976                else
 977                        abs_printout(cpu, counter, val);
 978
 979                if (!csv_output) {
 980                        print_noise(counter, 1.0);
 981
 982                        if (run != ena)
 983                                fprintf(output, "  (%.2f%%)",
 984                                        100.0 * run / ena);
 985                }
 986                fputc('\n', output);
 987        }
 988}
 989
 990static void print_stat(int argc, const char **argv)
 991{
 992        struct perf_evsel *counter;
 993        int i;
 994
 995        fflush(stdout);
 996
 997        if (!csv_output) {
 998                fprintf(output, "\n");
 999                fprintf(output, " Performance counter stats for ");
1000                if (!perf_target__has_task(&target)) {
1001                        fprintf(output, "\'%s", argv[0]);
1002                        for (i = 1; i < argc; i++)
1003                                fprintf(output, " %s", argv[i]);
1004                } else if (target.pid)
1005                        fprintf(output, "process id \'%s", target.pid);
1006                else
1007                        fprintf(output, "thread id \'%s", target.tid);
1008
1009                fprintf(output, "\'");
1010                if (run_count > 1)
1011                        fprintf(output, " (%d runs)", run_count);
1012                fprintf(output, ":\n\n");
1013        }
1014
1015        if (no_aggr) {
1016                list_for_each_entry(counter, &evsel_list->entries, node)
1017                        print_counter(counter);
1018        } else {
1019                list_for_each_entry(counter, &evsel_list->entries, node)
1020                        print_counter_aggr(counter);
1021        }
1022
1023        if (!csv_output) {
1024                if (!null_run)
1025                        fprintf(output, "\n");
1026                fprintf(output, " %17.9f seconds time elapsed",
1027                                avg_stats(&walltime_nsecs_stats)/1e9);
1028                if (run_count > 1) {
1029                        fprintf(output, "                                        ");
1030                        print_noise_pct(stddev_stats(&walltime_nsecs_stats),
1031                                        avg_stats(&walltime_nsecs_stats));
1032                }
1033                fprintf(output, "\n\n");
1034        }
1035}
1036
1037static volatile int signr = -1;
1038
1039static void skip_signal(int signo)
1040{
1041        if(child_pid == -1)
1042                done = 1;
1043
1044        signr = signo;
1045}
1046
1047static void sig_atexit(void)
1048{
1049        if (child_pid != -1)
1050                kill(child_pid, SIGTERM);
1051
1052        if (signr == -1)
1053                return;
1054
1055        signal(signr, SIG_DFL);
1056        kill(getpid(), signr);
1057}
1058
1059static const char * const stat_usage[] = {
1060        "perf stat [<options>] [<command>]",
1061        NULL
1062};
1063
1064static int stat__set_big_num(const struct option *opt __used,
1065                             const char *s __used, int unset)
1066{
1067        big_num_opt = unset ? 0 : 1;
1068        return 0;
1069}
1070
1071static bool append_file;
1072
1073static const struct option options[] = {
1074        OPT_CALLBACK('e', "event", &evsel_list, "event",
1075                     "event selector. use 'perf list' to list available events",
1076                     parse_events_option),
1077        OPT_CALLBACK(0, "filter", &evsel_list, "filter",
1078                     "event filter", parse_filter),
1079        OPT_BOOLEAN('i', "no-inherit", &no_inherit,
1080                    "child tasks do not inherit counters"),
1081        OPT_STRING('p', "pid", &target.pid, "pid",
1082                   "stat events on existing process id"),
1083        OPT_STRING('t', "tid", &target.tid, "tid",
1084                   "stat events on existing thread id"),
1085        OPT_BOOLEAN('a', "all-cpus", &target.system_wide,
1086                    "system-wide collection from all CPUs"),
1087        OPT_BOOLEAN('g', "group", &group,
1088                    "put the counters into a counter group"),
1089        OPT_BOOLEAN('c', "scale", &scale,
1090                    "scale/normalize counters"),
1091        OPT_INCR('v', "verbose", &verbose,
1092                    "be more verbose (show counter open errors, etc)"),
1093        OPT_INTEGER('r', "repeat", &run_count,
1094                    "repeat command and print average + stddev (max: 100)"),
1095        OPT_BOOLEAN('n', "null", &null_run,
1096                    "null run - dont start any counters"),
1097        OPT_INCR('d', "detailed", &detailed_run,
1098                    "detailed run - start a lot of events"),
1099        OPT_BOOLEAN('S', "sync", &sync_run,
1100                    "call sync() before starting a run"),
1101        OPT_CALLBACK_NOOPT('B', "big-num", NULL, NULL, 
1102                           "print large numbers with thousands\' separators",
1103                           stat__set_big_num),
1104        OPT_STRING('C', "cpu", &target.cpu_list, "cpu",
1105                    "list of cpus to monitor in system-wide"),
1106        OPT_BOOLEAN('A', "no-aggr", &no_aggr,
1107                    "disable CPU count aggregation"),
1108        OPT_STRING('x', "field-separator", &csv_sep, "separator",
1109                   "print counts with custom separator"),
1110        OPT_CALLBACK('G', "cgroup", &evsel_list, "name",
1111                     "monitor event in cgroup name only",
1112                     parse_cgroups),
1113        OPT_STRING('o', "output", &output_name, "file",
1114                    "output file name"),
1115        OPT_BOOLEAN(0, "append", &append_file, "append to the output file"),
1116        OPT_INTEGER(0, "log-fd", &output_fd,
1117                    "log output to fd, instead of stderr"),
1118        OPT_END()
1119};
1120
1121/*
1122 * Add default attributes, if there were no attributes specified or
1123 * if -d/--detailed, -d -d or -d -d -d is used:
1124 */
1125static int add_default_attributes(void)
1126{
1127        /* Set attrs if no event is selected and !null_run: */
1128        if (null_run)
1129                return 0;
1130
1131        if (!evsel_list->nr_entries) {
1132                if (perf_evlist__add_default_attrs(evsel_list, default_attrs) < 0)
1133                        return -1;
1134        }
1135
1136        /* Detailed events get appended to the event list: */
1137
1138        if (detailed_run <  1)
1139                return 0;
1140
1141        /* Append detailed run extra attributes: */
1142        if (perf_evlist__add_default_attrs(evsel_list, detailed_attrs) < 0)
1143                return -1;
1144
1145        if (detailed_run < 2)
1146                return 0;
1147
1148        /* Append very detailed run extra attributes: */
1149        if (perf_evlist__add_default_attrs(evsel_list, very_detailed_attrs) < 0)
1150                return -1;
1151
1152        if (detailed_run < 3)
1153                return 0;
1154
1155        /* Append very, very detailed run extra attributes: */
1156        return perf_evlist__add_default_attrs(evsel_list, very_very_detailed_attrs);
1157}
1158
1159int cmd_stat(int argc, const char **argv, const char *prefix __used)
1160{
1161        struct perf_evsel *pos;
1162        int status = -ENOMEM;
1163        const char *mode;
1164
1165        setlocale(LC_ALL, "");
1166
1167        evsel_list = perf_evlist__new(NULL, NULL);
1168        if (evsel_list == NULL)
1169                return -ENOMEM;
1170
1171        argc = parse_options(argc, argv, options, stat_usage,
1172                PARSE_OPT_STOP_AT_NON_OPTION);
1173
1174        output = stderr;
1175        if (output_name && strcmp(output_name, "-"))
1176                output = NULL;
1177
1178        if (output_name && output_fd) {
1179                fprintf(stderr, "cannot use both --output and --log-fd\n");
1180                usage_with_options(stat_usage, options);
1181        }
1182
1183        if (output_fd < 0) {
1184                fprintf(stderr, "argument to --log-fd must be a > 0\n");
1185                usage_with_options(stat_usage, options);
1186        }
1187
1188        if (!output) {
1189                struct timespec tm;
1190                mode = append_file ? "a" : "w";
1191
1192                output = fopen(output_name, mode);
1193                if (!output) {
1194                        perror("failed to create output file");
1195                        exit(-1);
1196                }
1197                clock_gettime(CLOCK_REALTIME, &tm);
1198                fprintf(output, "# started on %s\n", ctime(&tm.tv_sec));
1199        } else if (output_fd > 0) {
1200                mode = append_file ? "a" : "w";
1201                output = fdopen(output_fd, mode);
1202                if (!output) {
1203                        perror("Failed opening logfd");
1204                        return -errno;
1205                }
1206        }
1207
1208        if (csv_sep) {
1209                csv_output = true;
1210                if (!strcmp(csv_sep, "\\t"))
1211                        csv_sep = "\t";
1212        } else
1213                csv_sep = DEFAULT_SEPARATOR;
1214
1215        /*
1216         * let the spreadsheet do the pretty-printing
1217         */
1218        if (csv_output) {
1219                /* User explicitly passed -B? */
1220                if (big_num_opt == 1) {
1221                        fprintf(stderr, "-B option not supported with -x\n");
1222                        usage_with_options(stat_usage, options);
1223                } else /* Nope, so disable big number formatting */
1224                        big_num = false;
1225        } else if (big_num_opt == 0) /* User passed --no-big-num */
1226                big_num = false;
1227
1228        if (!argc && !perf_target__has_task(&target))
1229                usage_with_options(stat_usage, options);
1230        if (run_count <= 0)
1231                usage_with_options(stat_usage, options);
1232
1233        /* no_aggr, cgroup are for system-wide only */
1234        if ((no_aggr || nr_cgroups) && !perf_target__has_cpu(&target)) {
1235                fprintf(stderr, "both cgroup and no-aggregation "
1236                        "modes only available in system-wide mode\n");
1237
1238                usage_with_options(stat_usage, options);
1239        }
1240
1241        if (add_default_attributes())
1242                goto out;
1243
1244        perf_target__validate(&target);
1245
1246        if (perf_evlist__create_maps(evsel_list, &target) < 0) {
1247                if (perf_target__has_task(&target))
1248                        pr_err("Problems finding threads of monitor\n");
1249                if (perf_target__has_cpu(&target))
1250                        perror("failed to parse CPUs map");
1251
1252                usage_with_options(stat_usage, options);
1253                return -1;
1254        }
1255
1256        list_for_each_entry(pos, &evsel_list->entries, node) {
1257                if (perf_evsel__alloc_stat_priv(pos) < 0 ||
1258                    perf_evsel__alloc_counts(pos, evsel_list->cpus->nr) < 0)
1259                        goto out_free_fd;
1260        }
1261
1262        /*
1263         * We dont want to block the signals - that would cause
1264         * child tasks to inherit that and Ctrl-C would not work.
1265         * What we want is for Ctrl-C to work in the exec()-ed
1266         * task, but being ignored by perf stat itself:
1267         */
1268        atexit(sig_atexit);
1269        signal(SIGINT,  skip_signal);
1270        signal(SIGALRM, skip_signal);
1271        signal(SIGABRT, skip_signal);
1272
1273        status = 0;
1274        for (run_idx = 0; run_idx < run_count; run_idx++) {
1275                if (run_count != 1 && verbose)
1276                        fprintf(output, "[ perf stat: executing run #%d ... ]\n",
1277                                run_idx + 1);
1278
1279                if (sync_run)
1280                        sync();
1281
1282                status = run_perf_stat(argc, argv);
1283        }
1284
1285        if (status != -1)
1286                print_stat(argc, argv);
1287out_free_fd:
1288        list_for_each_entry(pos, &evsel_list->entries, node)
1289                perf_evsel__free_stat_priv(pos);
1290        perf_evlist__delete_maps(evsel_list);
1291out:
1292        perf_evlist__delete(evsel_list);
1293        return status;
1294}
1295
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