tools/perf/builtin-stat.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * builtin-stat.c
   4  *
   5  * Builtin stat command: Give a precise performance counters summary
   6  * overview about any workload, CPU or specific PID.
   7  *
   8  * Sample output:
   9
  10    $ perf stat ./hackbench 10
  11
  12   Time: 0.118
  13
  14   Performance counter stats for './hackbench 10':
  15
  16        1708.761321 task-clock                #   11.037 CPUs utilized
  17             41,190 context-switches          #    0.024 M/sec
  18              6,735 CPU-migrations            #    0.004 M/sec
  19             17,318 page-faults               #    0.010 M/sec
  20      5,205,202,243 cycles                    #    3.046 GHz
  21      3,856,436,920 stalled-cycles-frontend   #   74.09% frontend cycles idle
  22      1,600,790,871 stalled-cycles-backend    #   30.75% backend  cycles idle
  23      2,603,501,247 instructions              #    0.50  insns per cycle
  24                                              #    1.48  stalled cycles per insn
  25        484,357,498 branches                  #  283.455 M/sec
  26          6,388,934 branch-misses             #    1.32% of all branches
  27
  28         0.154822978  seconds time elapsed
  29
  30  *
  31  * Copyright (C) 2008-2011, Red Hat Inc, Ingo Molnar <mingo@redhat.com>
  32  *
  33  * Improvements and fixes by:
  34  *
  35  *   Arjan van de Ven <arjan@linux.intel.com>
  36  *   Yanmin Zhang <yanmin.zhang@intel.com>
  37  *   Wu Fengguang <fengguang.wu@intel.com>
  38  *   Mike Galbraith <efault@gmx.de>
  39  *   Paul Mackerras <paulus@samba.org>
  40  *   Jaswinder Singh Rajput <jaswinder@kernel.org>
  41  */
  42
  43 #include "builtin.h"
  44 #include "perf.h"
  45 #include "util/cgroup.h"
  46 #include <subcmd/parse-options.h>
  47 #include "util/parse-events.h"
  48 #include "util/pmu.h"
  49 #include "util/event.h"
  50 #include "util/evlist.h"
  51 #include "util/evlist-hybrid.h"
  52 #include "util/evsel.h"
  53 #include "util/debug.h"
  54 #include "util/color.h"
  55 #include "util/stat.h"
  56 #include "util/header.h"
  57 #include "util/cpumap.h"
  58 #include "util/thread_map.h"
  59 #include "util/counts.h"
  60 #include "util/topdown.h"
  61 #include "util/session.h"
  62 #include "util/tool.h"
  63 #include "util/string2.h"
  64 #include "util/metricgroup.h"
  65 #include "util/synthetic-events.h"
  66 #include "util/target.h"
  67 #include "util/time-utils.h"
  68 #include "util/top.h"
  69 #include "util/affinity.h"
  70 #include "util/pfm.h"
  71 #include "util/bpf_counter.h"
  72 #include "util/iostat.h"
  73 #include "util/pmu-hybrid.h"
  74 #include "asm/bug.h"
  75
  76 #include <linux/time64.h>
  77 #include <linux/zalloc.h>
  78 #include <api/fs/fs.h>
  79 #include <errno.h>
  80 #include <signal.h>
  81 #include <stdlib.h>
  82 #include <sys/prctl.h>
  83 #include <inttypes.h>
  84 #include <locale.h>
  85 #include <math.h>
  86 #include <sys/types.h>
  87 #include <sys/stat.h>
  88 #include <sys/wait.h>
  89 #include <unistd.h>
  90 #include <sys/time.h>
  91 #include <sys/resource.h>
  92 #include <linux/err.h>
  93
  94 #include <linux/ctype.h>
  95 #include <perf/evlist.h>
  96
  97 #define DEFAULT_SEPARATOR       " "
  98 #define FREEZE_ON_SMI_PATH      "devices/cpu/freeze_on_smi"
  99
 100 static void print_counters(struct timespec *ts, int argc, const char **argv);
 101
 102 /* Default events used for perf stat -T */
 103 static const char *transaction_attrs = {
 104         "task-clock,"
 105         "{"
 106         "instructions,"
 107         "cycles,"
 108         "cpu/cycles-t/,"
 109         "cpu/tx-start/,"
 110         "cpu/el-start/,"
 111         "cpu/cycles-ct/"
 112         "}"
 113 };
 114
 115 /* More limited version when the CPU does not have all events. */
 116 static const char * transaction_limited_attrs = {
 117         "task-clock,"
 118         "{"
 119         "instructions,"
 120         "cycles,"
 121         "cpu/cycles-t/,"
 122         "cpu/tx-start/"
 123         "}"
 124 };
 125
 126 static const char * topdown_attrs[] = {
 127         "topdown-total-slots",
 128         "topdown-slots-retired",
 129         "topdown-recovery-bubbles",
 130         "topdown-fetch-bubbles",
 131         "topdown-slots-issued",
 132         NULL,
 133 };
 134
 135 static const char *topdown_metric_attrs[] = {
 136         "slots",
 137         "topdown-retiring",
 138         "topdown-bad-spec",
 139         "topdown-fe-bound",
 140         "topdown-be-bound",
 141         NULL,
 142 };
 143
 144 static const char *topdown_metric_L2_attrs[] = {
 145         "slots",
 146         "topdown-retiring",
 147         "topdown-bad-spec",
 148         "topdown-fe-bound",
 149         "topdown-be-bound",
 150         "topdown-heavy-ops",
 151         "topdown-br-mispredict",
 152         "topdown-fetch-lat",
 153         "topdown-mem-bound",
 154         NULL,
 155 };
 156
 157 #define TOPDOWN_MAX_LEVEL                       2
 158
 159 static const char *smi_cost_attrs = {
 160         "{"
 161         "msr/aperf/,"
 162         "msr/smi/,"
 163         "cycles"
 164         "}"
 165 };
 166
 167 static struct evlist    *evsel_list;
 168 static bool all_counters_use_bpf = true;
 169
 170 static struct target target = {
 171         .uid    = UINT_MAX,
 172 };
 173
 174 #define METRIC_ONLY_LEN 20
 175
 176 static volatile pid_t           child_pid                       = -1;
 177 static int                      detailed_run                    =  0;
 178 static bool                     transaction_run;
 179 static bool                     topdown_run                     = false;
 180 static bool                     smi_cost                        = false;
 181 static bool                     smi_reset                       = false;
 182 static int                      big_num_opt                     =  -1;
 183 static bool                     group                           = false;
 184 static const char               *pre_cmd                        = NULL;
 185 static const char               *post_cmd                       = NULL;
 186 static bool                     sync_run                        = false;
 187 static bool                     forever                         = false;
 188 static bool                     force_metric_only               = false;
 189 static struct timespec          ref_time;
 190 static bool                     append_file;
 191 static bool                     interval_count;
 192 static const char               *output_name;
 193 static int                      output_fd;
 194
 195 struct perf_stat {
 196         bool                     record;
 197         struct perf_data         data;
 198         struct perf_session     *session;
 199         u64                      bytes_written;
 200         struct perf_tool         tool;
 201         bool                     maps_allocated;
 202         struct perf_cpu_map     *cpus;
 203         struct perf_thread_map *threads;
 204         enum aggr_mode           aggr_mode;
 205 };
 206
 207 static struct perf_stat         perf_stat;
 208 #define STAT_RECORD             perf_stat.record
 209
 210 static volatile int done = 0;
 211
 212 static struct perf_stat_config stat_config = {
 213         .aggr_mode              = AGGR_GLOBAL,
 214         .scale                  = true,
 215         .unit_width             = 4, /* strlen("unit") */
 216         .run_count              = 1,
 217         .metric_only_len        = METRIC_ONLY_LEN,
 218         .walltime_nsecs_stats   = &walltime_nsecs_stats,
 219         .big_num                = true,
 220         .ctl_fd                 = -1,
 221         .ctl_fd_ack             = -1,
 222         .iostat_run             = false,
 223 };
 224
 225 static bool cpus_map_matched(struct evsel *a, struct evsel *b)
 226 {
 227         if (!a->core.cpus && !b->core.cpus)
 228                 return true;
 229
 230         if (!a->core.cpus || !b->core.cpus)
 231                 return false;
 232
 233         if (perf_cpu_map__nr(a->core.cpus) != perf_cpu_map__nr(b->core.cpus))
 234                 return false;
 235
 236         for (int i = 0; i < perf_cpu_map__nr(a->core.cpus); i++) {
 237                 if (perf_cpu_map__cpu(a->core.cpus, i).cpu !=
 238                     perf_cpu_map__cpu(b->core.cpus, i).cpu)
 239                         return false;
 240         }
 241
 242         return true;
 243 }
 244
 245 static void evlist__check_cpu_maps(struct evlist *evlist)
 246 {
 247         struct evsel *evsel, *pos, *leader;
 248         char buf[1024];
 249
 250         if (evlist__has_hybrid(evlist))
 251                 evlist__warn_hybrid_group(evlist);
 252
 253         evlist__for_each_entry(evlist, evsel) {
 254                 leader = evsel__leader(evsel);
 255
 256                 /* Check that leader matches cpus with each member. */
 257                 if (leader == evsel)
 258                         continue;
 259                 if (cpus_map_matched(leader, evsel))
 260                         continue;
 261
 262                 /* If there's mismatch disable the group and warn user. */
 263                 WARN_ONCE(1, "WARNING: grouped events cpus do not match, disabling group:\n");
 264                 evsel__group_desc(leader, buf, sizeof(buf));
 265                 pr_warning("  %s\n", buf);
 266
 267                 if (verbose) {
 268                         cpu_map__snprint(leader->core.cpus, buf, sizeof(buf));
 269                         pr_warning("     %s: %s\n", leader->name, buf);
 270                         cpu_map__snprint(evsel->core.cpus, buf, sizeof(buf));
 271                         pr_warning("     %s: %s\n", evsel->name, buf);
 272                 }
 273
 274                 for_each_group_evsel(pos, leader) {
 275                         evsel__set_leader(pos, pos);
 276                         pos->core.nr_members = 0;
 277                 }
 278                 evsel->core.leader->nr_members = 0;
 279         }
 280 }
 281
 282 static inline void diff_timespec(struct timespec *r, struct timespec *a,
 283                                  struct timespec *b)
 284 {
 285         r->tv_sec = a->tv_sec - b->tv_sec;
 286         if (a->tv_nsec < b->tv_nsec) {
 287                 r->tv_nsec = a->tv_nsec + NSEC_PER_SEC - b->tv_nsec;
 288                 r->tv_sec--;
 289         } else {
 290                 r->tv_nsec = a->tv_nsec - b->tv_nsec ;
 291         }
 292 }
 293
 294 static void perf_stat__reset_stats(void)
 295 {
 296         int i;
 297
 298         evlist__reset_stats(evsel_list);
 299         perf_stat__reset_shadow_stats();
 300
 301         for (i = 0; i < stat_config.stats_num; i++)
 302                 perf_stat__reset_shadow_per_stat(&stat_config.stats[i]);
 303 }
 304
 305 static int process_synthesized_event(struct perf_tool *tool __maybe_unused,
 306                                      union perf_event *event,
 307                                      struct perf_sample *sample __maybe_unused,
 308                                      struct machine *machine __maybe_unused)
 309 {
 310         if (perf_data__write(&perf_stat.data, event, event->header.size) < 0) {
 311                 pr_err("failed to write perf data, error: %m\n");
 312                 return -1;
 313         }
 314
 315         perf_stat.bytes_written += event->header.size;
 316         return 0;
 317 }
 318
 319 static int write_stat_round_event(u64 tm, u64 type)
 320 {
 321         return perf_event__synthesize_stat_round(NULL, tm, type,
 322                                                  process_synthesized_event,
 323                                                  NULL);
 324 }
 325
 326 #define WRITE_STAT_ROUND_EVENT(time, interval) \
 327         write_stat_round_event(time, PERF_STAT_ROUND_TYPE__ ## interval)
 328
 329 #define SID(e, x, y) xyarray__entry(e->core.sample_id, x, y)
 330
 331 static int evsel__write_stat_event(struct evsel *counter, int cpu_map_idx, u32 thread,
 332                                    struct perf_counts_values *count)
 333 {
 334         struct perf_sample_id *sid = SID(counter, cpu_map_idx, thread);
 335         struct perf_cpu cpu = perf_cpu_map__cpu(evsel__cpus(counter), cpu_map_idx);
 336
 337         return perf_event__synthesize_stat(NULL, cpu, thread, sid->id, count,
 338                                            process_synthesized_event, NULL);
 339 }
 340
 341 static int read_single_counter(struct evsel *counter, int cpu_map_idx,
 342                                int thread, struct timespec *rs)
 343 {
 344         if (counter->tool_event == PERF_TOOL_DURATION_TIME) {
 345                 u64 val = rs->tv_nsec + rs->tv_sec*1000000000ULL;
 346                 struct perf_counts_values *count =
 347                         perf_counts(counter->counts, cpu_map_idx, thread);
 348                 count->ena = count->run = val;
 349                 count->val = val;
 350                 return 0;
 351         }
 352         return evsel__read_counter(counter, cpu_map_idx, thread);
 353 }
 354
 355 /*
 356  * Read out the results of a single counter:
 357  * do not aggregate counts across CPUs in system-wide mode
 358  */
 359 static int read_counter_cpu(struct evsel *counter, struct timespec *rs, int cpu_map_idx)
 360 {
 361         int nthreads = perf_thread_map__nr(evsel_list->core.threads);
 362         int thread;
 363
 364         if (!counter->supported)
 365                 return -ENOENT;
 366
 367         if (counter->core.system_wide)
 368                 nthreads = 1;
 369
 370         for (thread = 0; thread < nthreads; thread++) {
 371                 struct perf_counts_values *count;
 372
 373                 count = perf_counts(counter->counts, cpu_map_idx, thread);
 374
 375                 /*
 376                  * The leader's group read loads data into its group members
 377                  * (via evsel__read_counter()) and sets their count->loaded.
 378                  */
 379                 if (!perf_counts__is_loaded(counter->counts, cpu_map_idx, thread) &&
 380                     read_single_counter(counter, cpu_map_idx, thread, rs)) {
 381                         counter->counts->scaled = -1;
 382                         perf_counts(counter->counts, cpu_map_idx, thread)->ena = 0;
 383                         perf_counts(counter->counts, cpu_map_idx, thread)->run = 0;
 384                         return -1;
 385                 }
 386
 387                 perf_counts__set_loaded(counter->counts, cpu_map_idx, thread, false);
 388
 389                 if (STAT_RECORD) {
 390                         if (evsel__write_stat_event(counter, cpu_map_idx, thread, count)) {
 391                                 pr_err("failed to write stat event\n");
 392                                 return -1;
 393                         }
 394                 }
 395
 396                 if (verbose > 1) {
 397                         fprintf(stat_config.output,
 398                                 "%s: %d: %" PRIu64 " %" PRIu64 " %" PRIu64 "\n",
 399                                         evsel__name(counter),
 400                                         perf_cpu_map__cpu(evsel__cpus(counter),
 401                                                           cpu_map_idx).cpu,
 402                                         count->val, count->ena, count->run);
 403                 }
 404         }
 405
 406         return 0;
 407 }
 408
 409 static int read_affinity_counters(struct timespec *rs)
 410 {
 411         struct evlist_cpu_iterator evlist_cpu_itr;
 412         struct affinity saved_affinity, *affinity;
 413
 414         if (all_counters_use_bpf)
 415                 return 0;
 416
 417         if (!target__has_cpu(&target) || target__has_per_thread(&target))
 418                 affinity = NULL;
 419         else if (affinity__setup(&saved_affinity) < 0)
 420                 return -1;
 421         else
 422                 affinity = &saved_affinity;
 423
 424         evlist__for_each_cpu(evlist_cpu_itr, evsel_list, affinity) {
 425                 struct evsel *counter = evlist_cpu_itr.evsel;
 426
 427                 if (evsel__is_bpf(counter))
 428                         continue;
 429
 430                 if (!counter->err) {
 431                         counter->err = read_counter_cpu(counter, rs,
 432                                                         evlist_cpu_itr.cpu_map_idx);
 433                 }
 434         }
 435         if (affinity)
 436                 affinity__cleanup(&saved_affinity);
 437
 438         return 0;
 439 }
 440
 441 static int read_bpf_map_counters(void)
 442 {
 443         struct evsel *counter;
 444         int err;
 445
 446         evlist__for_each_entry(evsel_list, counter) {
 447                 if (!evsel__is_bpf(counter))
 448                         continue;
 449
 450                 err = bpf_counter__read(counter);
 451                 if (err)
 452                         return err;
 453         }
 454         return 0;
 455 }
 456
 457 static void read_counters(struct timespec *rs)
 458 {
 459         struct evsel *counter;
 460
 461         if (!stat_config.stop_read_counter) {
 462                 if (read_bpf_map_counters() ||
 463                     read_affinity_counters(rs))
 464                         return;
 465         }
 466
 467         evlist__for_each_entry(evsel_list, counter) {
 468                 if (counter->err)
 469                         pr_debug("failed to read counter %s\n", counter->name);
 470                 if (counter->err == 0 && perf_stat_process_counter(&stat_config, counter))
 471                         pr_warning("failed to process counter %s\n", counter->name);
 472                 counter->err = 0;
 473         }
 474 }
 475
 476 static int runtime_stat_new(struct perf_stat_config *config, int nthreads)
 477 {
 478         int i;
 479
 480         config->stats = calloc(nthreads, sizeof(struct runtime_stat));
 481         if (!config->stats)
 482                 return -1;
 483
 484         config->stats_num = nthreads;
 485
 486         for (i = 0; i < nthreads; i++)
 487                 runtime_stat__init(&config->stats[i]);
 488
 489         return 0;
 490 }
 491
 492 static void runtime_stat_delete(struct perf_stat_config *config)
 493 {
 494         int i;
 495
 496         if (!config->stats)
 497                 return;
 498
 499         for (i = 0; i < config->stats_num; i++)
 500                 runtime_stat__exit(&config->stats[i]);
 501
 502         zfree(&config->stats);
 503 }
 504
 505 static void runtime_stat_reset(struct perf_stat_config *config)
 506 {
 507         int i;
 508
 509         if (!config->stats)
 510                 return;
 511
 512         for (i = 0; i < config->stats_num; i++)
 513                 perf_stat__reset_shadow_per_stat(&config->stats[i]);
 514 }
 515
 516 static void process_interval(void)
 517 {
 518         struct timespec ts, rs;
 519
 520         clock_gettime(CLOCK_MONOTONIC, &ts);
 521         diff_timespec(&rs, &ts, &ref_time);
 522
 523         perf_stat__reset_shadow_per_stat(&rt_stat);
 524         runtime_stat_reset(&stat_config);
 525         read_counters(&rs);
 526
 527         if (STAT_RECORD) {
 528                 if (WRITE_STAT_ROUND_EVENT(rs.tv_sec * NSEC_PER_SEC + rs.tv_nsec, INTERVAL))
 529                         pr_err("failed to write stat round event\n");
 530         }
 531
 532         init_stats(&walltime_nsecs_stats);
 533         update_stats(&walltime_nsecs_stats, stat_config.interval * 1000000ULL);
 534         print_counters(&rs, 0, NULL);
 535 }
 536
 537 static bool handle_interval(unsigned int interval, int *times)
 538 {
 539         if (interval) {
 540                 process_interval();
 541                 if (interval_count && !(--(*times)))
 542                         return true;
 543         }
 544         return false;
 545 }
 546
 547 static int enable_counters(void)
 548 {
 549         struct evsel *evsel;
 550         int err;
 551
 552         evlist__for_each_entry(evsel_list, evsel) {
 553                 if (!evsel__is_bpf(evsel))
 554                         continue;
 555
 556                 err = bpf_counter__enable(evsel);
 557                 if (err)
 558                         return err;
 559         }
 560
 561         if (stat_config.initial_delay < 0) {
 562                 pr_info(EVLIST_DISABLED_MSG);
 563                 return 0;
 564         }
 565
 566         if (stat_config.initial_delay > 0) {
 567                 pr_info(EVLIST_DISABLED_MSG);
 568                 usleep(stat_config.initial_delay * USEC_PER_MSEC);
 569         }
 570
 571         /*
 572          * We need to enable counters only if:
 573          * - we don't have tracee (attaching to task or cpu)
 574          * - we have initial delay configured
 575          */
 576         if (!target__none(&target) || stat_config.initial_delay) {
 577                 if (!all_counters_use_bpf)
 578                         evlist__enable(evsel_list);
 579                 if (stat_config.initial_delay > 0)
 580                         pr_info(EVLIST_ENABLED_MSG);
 581         }
 582         return 0;
 583 }
 584
 585 static void disable_counters(void)
 586 {
 587         struct evsel *counter;
 588
 589         /*
 590          * If we don't have tracee (attaching to task or cpu), counters may
 591          * still be running. To get accurate group ratios, we must stop groups
 592          * from counting before reading their constituent counters.
 593          */
 594         if (!target__none(&target)) {
 595                 evlist__for_each_entry(evsel_list, counter)
 596                         bpf_counter__disable(counter);
 597                 if (!all_counters_use_bpf)
 598                         evlist__disable(evsel_list);
 599         }
 600 }
 601
 602 static volatile int workload_exec_errno;
 603
 604 /*
 605  * evlist__prepare_workload will send a SIGUSR1
 606  * if the fork fails, since we asked by setting its
 607  * want_signal to true.
 608  */
 609 static void workload_exec_failed_signal(int signo __maybe_unused, siginfo_t *info,
 610                                         void *ucontext __maybe_unused)
 611 {
 612         workload_exec_errno = info->si_value.sival_int;
 613 }
 614
 615 static bool evsel__should_store_id(struct evsel *counter)
 616 {
 617         return STAT_RECORD || counter->core.attr.read_format & PERF_FORMAT_ID;
 618 }
 619
 620 static bool is_target_alive(struct target *_target,
 621                             struct perf_thread_map *threads)
 622 {
 623         struct stat st;
 624         int i;
 625
 626         if (!target__has_task(_target))
 627                 return true;
 628
 629         for (i = 0; i < threads->nr; i++) {
 630                 char path[PATH_MAX];
 631
 632                 scnprintf(path, PATH_MAX, "%s/%d", procfs__mountpoint(),
 633                           threads->map[i].pid);
 634
 635                 if (!stat(path, &st))
 636                         return true;
 637         }
 638
 639         return false;
 640 }
 641
 642 static void process_evlist(struct evlist *evlist, unsigned int interval)
 643 {
 644         enum evlist_ctl_cmd cmd = EVLIST_CTL_CMD_UNSUPPORTED;
 645
 646         if (evlist__ctlfd_process(evlist, &cmd) > 0) {
 647                 switch (cmd) {
 648                 case EVLIST_CTL_CMD_ENABLE:
 649                         if (interval)
 650                                 process_interval();
 651                         break;
 652                 case EVLIST_CTL_CMD_DISABLE:
 653                         if (interval)
 654                                 process_interval();
 655                         break;
 656                 case EVLIST_CTL_CMD_SNAPSHOT:
 657                 case EVLIST_CTL_CMD_ACK:
 658                 case EVLIST_CTL_CMD_UNSUPPORTED:
 659                 case EVLIST_CTL_CMD_EVLIST:
 660                 case EVLIST_CTL_CMD_STOP:
 661                 case EVLIST_CTL_CMD_PING:
 662                 default:
 663                         break;
 664                 }
 665         }
 666 }
 667
 668 static void compute_tts(struct timespec *time_start, struct timespec *time_stop,
 669                         int *time_to_sleep)
 670 {
 671         int tts = *time_to_sleep;
 672         struct timespec time_diff;
 673
 674         diff_timespec(&time_diff, time_stop, time_start);
 675
 676         tts -= time_diff.tv_sec * MSEC_PER_SEC +
 677                time_diff.tv_nsec / NSEC_PER_MSEC;
 678
 679         if (tts < 0)
 680                 tts = 0;
 681
 682         *time_to_sleep = tts;
 683 }
 684
 685 static int dispatch_events(bool forks, int timeout, int interval, int *times)
 686 {
 687         int child_exited = 0, status = 0;
 688         int time_to_sleep, sleep_time;
 689         struct timespec time_start, time_stop;
 690
 691         if (interval)
 692                 sleep_time = interval;
 693         else if (timeout)
 694                 sleep_time = timeout;
 695         else
 696                 sleep_time = 1000;
 697
 698         time_to_sleep = sleep_time;
 699
 700         while (!done) {
 701                 if (forks)
 702                         child_exited = waitpid(child_pid, &status, WNOHANG);
 703                 else
 704                         child_exited = !is_target_alive(&target, evsel_list->core.threads) ? 1 : 0;
 705
 706                 if (child_exited)
 707                         break;
 708
 709                 clock_gettime(CLOCK_MONOTONIC, &time_start);
 710                 if (!(evlist__poll(evsel_list, time_to_sleep) > 0)) { /* poll timeout or EINTR */
 711                         if (timeout || handle_interval(interval, times))
 712                                 break;
 713                         time_to_sleep = sleep_time;
 714                 } else { /* fd revent */
 715                         process_evlist(evsel_list, interval);
 716                         clock_gettime(CLOCK_MONOTONIC, &time_stop);
 717                         compute_tts(&time_start, &time_stop, &time_to_sleep);
 718                 }
 719         }
 720
 721         return status;
 722 }
 723
 724 enum counter_recovery {
 725         COUNTER_SKIP,
 726         COUNTER_RETRY,
 727         COUNTER_FATAL,
 728 };
 729
 730 static enum counter_recovery stat_handle_error(struct evsel *counter)
 731 {
 732         char msg[BUFSIZ];
 733         /*
 734          * PPC returns ENXIO for HW counters until 2.6.37
 735          * (behavior changed with commit b0a873e).
 736          */
 737         if (errno == EINVAL || errno == ENOSYS ||
 738             errno == ENOENT || errno == EOPNOTSUPP ||
 739             errno == ENXIO) {
 740                 if (verbose > 0)
 741                         ui__warning("%s event is not supported by the kernel.\n",
 742                                     evsel__name(counter));
 743                 counter->supported = false;
 744                 /*
 745                  * errored is a sticky flag that means one of the counter's
 746                  * cpu event had a problem and needs to be reexamined.
 747                  */
 748                 counter->errored = true;
 749
 750                 if ((evsel__leader(counter) != counter) ||
 751                     !(counter->core.leader->nr_members > 1))
 752                         return COUNTER_SKIP;
 753         } else if (evsel__fallback(counter, errno, msg, sizeof(msg))) {
 754                 if (verbose > 0)
 755                         ui__warning("%s\n", msg);
 756                 return COUNTER_RETRY;
 757         } else if (target__has_per_thread(&target) &&
 758                    evsel_list->core.threads &&
 759                    evsel_list->core.threads->err_thread != -1) {
 760                 /*
 761                  * For global --per-thread case, skip current
 762                  * error thread.
 763                  */
 764                 if (!thread_map__remove(evsel_list->core.threads,
 765                                         evsel_list->core.threads->err_thread)) {
 766                         evsel_list->core.threads->err_thread = -1;
 767                         return COUNTER_RETRY;
 768                 }
 769         }
 770
 771         evsel__open_strerror(counter, &target, errno, msg, sizeof(msg));
 772         ui__error("%s\n", msg);
 773
 774         if (child_pid != -1)
 775                 kill(child_pid, SIGTERM);
 776         return COUNTER_FATAL;
 777 }
 778
 779 static int __run_perf_stat(int argc, const char **argv, int run_idx)
 780 {
 781         int interval = stat_config.interval;
 782         int times = stat_config.times;
 783         int timeout = stat_config.timeout;
 784         char msg[BUFSIZ];
 785         unsigned long long t0, t1;
 786         struct evsel *counter;
 787         size_t l;
 788         int status = 0;
 789         const bool forks = (argc > 0);
 790         bool is_pipe = STAT_RECORD ? perf_stat.data.is_pipe : false;
 791         struct evlist_cpu_iterator evlist_cpu_itr;
 792         struct affinity saved_affinity, *affinity = NULL;
 793         int err;
 794         bool second_pass = false;
 795
 796         if (forks) {
 797                 if (evlist__prepare_workload(evsel_list, &target, argv, is_pipe, workload_exec_failed_signal) < 0) {
 798                         perror("failed to prepare workload");
 799                         return -1;
 800                 }
 801                 child_pid = evsel_list->workload.pid;
 802         }
 803
 804         if (group)
 805                 evlist__set_leader(evsel_list);
 806
 807         if (!cpu_map__is_dummy(evsel_list->core.user_requested_cpus)) {
 808                 if (affinity__setup(&saved_affinity) < 0)
 809                         return -1;
 810                 affinity = &saved_affinity;
 811         }
 812
 813         evlist__for_each_entry(evsel_list, counter) {
 814                 if (bpf_counter__load(counter, &target))
 815                         return -1;
 816                 if (!evsel__is_bpf(counter))
 817                         all_counters_use_bpf = false;
 818         }
 819
 820         evlist__for_each_cpu(evlist_cpu_itr, evsel_list, affinity) {
 821                 counter = evlist_cpu_itr.evsel;
 822
 823                 /*
 824                  * bperf calls evsel__open_per_cpu() in bperf__load(), so
 825                  * no need to call it again here.
 826                  */
 827                 if (target.use_bpf)
 828                         break;
 829
 830                 if (counter->reset_group || counter->errored)
 831                         continue;
 832                 if (evsel__is_bpf(counter))
 833                         continue;
 834 try_again:
 835                 if (create_perf_stat_counter(counter, &stat_config, &target,
 836                                              evlist_cpu_itr.cpu_map_idx) < 0) {
 837
 838                         /*
 839                          * Weak group failed. We cannot just undo this here
 840                          * because earlier CPUs might be in group mode, and the kernel
 841                          * doesn't support mixing group and non group reads. Defer
 842                          * it to later.
 843                          * Don't close here because we're in the wrong affinity.
 844                          */
 845                         if ((errno == EINVAL || errno == EBADF) &&
 846                                 evsel__leader(counter) != counter &&
 847                                 counter->weak_group) {
 848                                 evlist__reset_weak_group(evsel_list, counter, false);
 849                                 assert(counter->reset_group);
 850                                 second_pass = true;
 851                                 continue;
 852                         }
 853
 854                         switch (stat_handle_error(counter)) {
 855                         case COUNTER_FATAL:
 856                                 return -1;
 857                         case COUNTER_RETRY:
 858                                 goto try_again;
 859                         case COUNTER_SKIP:
 860                                 continue;
 861                         default:
 862                                 break;
 863                         }
 864
 865                 }
 866                 counter->supported = true;
 867         }
 868
 869         if (second_pass) {
 870                 /*
 871                  * Now redo all the weak group after closing them,
 872                  * and also close errored counters.
 873                  */
 874
 875                 /* First close errored or weak retry */
 876                 evlist__for_each_cpu(evlist_cpu_itr, evsel_list, affinity) {
 877                         counter = evlist_cpu_itr.evsel;
 878
 879                         if (!counter->reset_group && !counter->errored)
 880                                 continue;
 881
 882                         perf_evsel__close_cpu(&counter->core, evlist_cpu_itr.cpu_map_idx);
 883                 }
 884                 /* Now reopen weak */
 885                 evlist__for_each_cpu(evlist_cpu_itr, evsel_list, affinity) {
 886                         counter = evlist_cpu_itr.evsel;
 887
 888                         if (!counter->reset_group && !counter->errored)
 889                                 continue;
 890                         if (!counter->reset_group)
 891                                 continue;
 892 try_again_reset:
 893                         pr_debug2("reopening weak %s\n", evsel__name(counter));
 894                         if (create_perf_stat_counter(counter, &stat_config, &target,
 895                                                      evlist_cpu_itr.cpu_map_idx) < 0) {
 896
 897                                 switch (stat_handle_error(counter)) {
 898                                 case COUNTER_FATAL:
 899                                         return -1;
 900                                 case COUNTER_RETRY:
 901                                         goto try_again_reset;
 902                                 case COUNTER_SKIP:
 903                                         continue;
 904                                 default:
 905                                         break;
 906                                 }
 907                         }
 908                         counter->supported = true;
 909                 }
 910         }
 911         affinity__cleanup(affinity);
 912
 913         evlist__for_each_entry(evsel_list, counter) {
 914                 if (!counter->supported) {
 915                         perf_evsel__free_fd(&counter->core);
 916                         continue;
 917                 }
 918
 919                 l = strlen(counter->unit);
 920                 if (l > stat_config.unit_width)
 921                         stat_config.unit_width = l;
 922
 923                 if (evsel__should_store_id(counter) &&
 924                     evsel__store_ids(counter, evsel_list))
 925                         return -1;
 926         }
 927
 928         if (evlist__apply_filters(evsel_list, &counter)) {
 929                 pr_err("failed to set filter \"%s\" on event %s with %d (%s)\n",
 930                         counter->filter, evsel__name(counter), errno,
 931                         str_error_r(errno, msg, sizeof(msg)));
 932                 return -1;
 933         }
 934
 935         if (STAT_RECORD) {
 936                 int fd = perf_data__fd(&perf_stat.data);
 937
 938                 if (is_pipe) {
 939                         err = perf_header__write_pipe(perf_data__fd(&perf_stat.data));
 940                 } else {
 941                         err = perf_session__write_header(perf_stat.session, evsel_list,
 942                                                          fd, false);
 943                 }
 944
 945                 if (err < 0)
 946                         return err;
 947
 948                 err = perf_event__synthesize_stat_events(&stat_config, NULL, evsel_list,
 949                                                          process_synthesized_event, is_pipe);
 950                 if (err < 0)
 951                         return err;
 952         }
 953
 954         /*
 955          * Enable counters and exec the command:
 956          */
 957         if (forks) {
 958                 err = enable_counters();
 959                 if (err)
 960                         return -1;
 961                 evlist__start_workload(evsel_list);
 962
 963                 t0 = rdclock();
 964                 clock_gettime(CLOCK_MONOTONIC, &ref_time);
 965
 966                 if (interval || timeout || evlist__ctlfd_initialized(evsel_list))
 967                         status = dispatch_events(forks, timeout, interval, &times);
 968                 if (child_pid != -1) {
 969                         if (timeout)
 970                                 kill(child_pid, SIGTERM);
 971                         wait4(child_pid, &status, 0, &stat_config.ru_data);
 972                 }
 973
 974                 if (workload_exec_errno) {
 975                         const char *emsg = str_error_r(workload_exec_errno, msg, sizeof(msg));
 976                         pr_err("Workload failed: %s\n", emsg);
 977                         return -1;
 978                 }
 979
 980                 if (WIFSIGNALED(status))
 981                         psignal(WTERMSIG(status), argv[0]);
 982         } else {
 983                 err = enable_counters();
 984                 if (err)
 985                         return -1;
 986
 987                 t0 = rdclock();
 988                 clock_gettime(CLOCK_MONOTONIC, &ref_time);
 989
 990                 status = dispatch_events(forks, timeout, interval, &times);
 991         }
 992
 993         disable_counters();
 994
 995         t1 = rdclock();
 996
 997         if (stat_config.walltime_run_table)
 998                 stat_config.walltime_run[run_idx] = t1 - t0;
 999
1000         if (interval && stat_config.summary) {
1001                 stat_config.interval = 0;
1002                 stat_config.stop_read_counter = true;
1003                 init_stats(&walltime_nsecs_stats);
1004                 update_stats(&walltime_nsecs_stats, t1 - t0);
1005
1006                 if (stat_config.aggr_mode == AGGR_GLOBAL)
1007                         evlist__save_aggr_prev_raw_counts(evsel_list);
1008
1009                 evlist__copy_prev_raw_counts(evsel_list);
1010                 evlist__reset_prev_raw_counts(evsel_list);
1011                 runtime_stat_reset(&stat_config);
1012                 perf_stat__reset_shadow_per_stat(&rt_stat);
1013         } else
1014                 update_stats(&walltime_nsecs_stats, t1 - t0);
1015
1016         /*
1017          * Closing a group leader splits the group, and as we only disable
1018          * group leaders, results in remaining events becoming enabled. To
1019          * avoid arbitrary skew, we must read all counters before closing any
1020          * group leaders.
1021          */
1022         read_counters(&(struct timespec) { .tv_nsec = t1-t0 });
1023
1024         /*
1025          * We need to keep evsel_list alive, because it's processed
1026          * later the evsel_list will be closed after.
1027          */
1028         if (!STAT_RECORD)
1029                 evlist__close(evsel_list);
1030
1031         return WEXITSTATUS(status);
1032 }
1033
1034 static int run_perf_stat(int argc, const char **argv, int run_idx)
1035 {
1036         int ret;
1037
1038         if (pre_cmd) {
1039                 ret = system(pre_cmd);
1040                 if (ret)
1041                         return ret;
1042         }
1043
1044         if (sync_run)
1045                 sync();
1046
1047         ret = __run_perf_stat(argc, argv, run_idx);
1048         if (ret)
1049                 return ret;
1050
1051         if (post_cmd) {
1052                 ret = system(post_cmd);
1053                 if (ret)
1054                         return ret;
1055         }
1056
1057         return ret;
1058 }
1059
1060 static void print_counters(struct timespec *ts, int argc, const char **argv)
1061 {
1062         /* Do not print anything if we record to the pipe. */
1063         if (STAT_RECORD && perf_stat.data.is_pipe)
1064                 return;
1065         if (stat_config.quiet)
1066                 return;
1067
1068         evlist__print_counters(evsel_list, &stat_config, &target, ts, argc, argv);
1069 }
1070
1071 static volatile int signr = -1;
1072
1073 static void skip_signal(int signo)
1074 {
1075         if ((child_pid == -1) || stat_config.interval)
1076                 done = 1;
1077
1078         signr = signo;
1079         /*
1080          * render child_pid harmless
1081          * won't send SIGTERM to a random
1082          * process in case of race condition
1083          * and fast PID recycling
1084          */
1085         child_pid = -1;
1086 }
1087
1088 static void sig_atexit(void)
1089 {
1090         sigset_t set, oset;
1091
1092         /*
1093          * avoid race condition with SIGCHLD handler
1094          * in skip_signal() which is modifying child_pid
1095          * goal is to avoid send SIGTERM to a random
1096          * process
1097          */
1098         sigemptyset(&set);
1099         sigaddset(&set, SIGCHLD);
1100         sigprocmask(SIG_BLOCK, &set, &oset);
1101
1102         if (child_pid != -1)
1103                 kill(child_pid, SIGTERM);
1104
1105         sigprocmask(SIG_SETMASK, &oset, NULL);
1106
1107         if (signr == -1)
1108                 return;
1109
1110         signal(signr, SIG_DFL);
1111         kill(getpid(), signr);
1112 }
1113
1114 void perf_stat__set_big_num(int set)
1115 {
1116         stat_config.big_num = (set != 0);
1117 }
1118
1119 void perf_stat__set_no_csv_summary(int set)
1120 {
1121         stat_config.no_csv_summary = (set != 0);
1122 }
1123
1124 static int stat__set_big_num(const struct option *opt __maybe_unused,
1125                              const char *s __maybe_unused, int unset)
1126 {
1127         big_num_opt = unset ? 0 : 1;
1128         perf_stat__set_big_num(!unset);
1129         return 0;
1130 }
1131
1132 static int enable_metric_only(const struct option *opt __maybe_unused,
1133                               const char *s __maybe_unused, int unset)
1134 {
1135         force_metric_only = true;
1136         stat_config.metric_only = !unset;
1137         return 0;
1138 }
1139
1140 static int parse_metric_groups(const struct option *opt,
1141                                const char *str,
1142                                int unset __maybe_unused)
1143 {
1144         return metricgroup__parse_groups(opt, str,
1145                                          stat_config.metric_no_group,
1146                                          stat_config.metric_no_merge,
1147                                          &stat_config.metric_events);
1148 }
1149
1150 static int parse_control_option(const struct option *opt,
1151                                 const char *str,
1152                                 int unset __maybe_unused)
1153 {
1154         struct perf_stat_config *config = opt->value;
1155
1156         return evlist__parse_control(str, &config->ctl_fd, &config->ctl_fd_ack, &config->ctl_fd_close);
1157 }
1158
1159 static int parse_stat_cgroups(const struct option *opt,
1160                               const char *str, int unset)
1161 {
1162         if (stat_config.cgroup_list) {
1163                 pr_err("--cgroup and --for-each-cgroup cannot be used together\n");
1164                 return -1;
1165         }
1166
1167         return parse_cgroups(opt, str, unset);
1168 }
1169
1170 static int parse_hybrid_type(const struct option *opt,
1171                              const char *str,
1172                              int unset __maybe_unused)
1173 {
1174         struct evlist *evlist = *(struct evlist **)opt->value;
1175
1176         if (!list_empty(&evlist->core.entries)) {
1177                 fprintf(stderr, "Must define cputype before events/metrics\n");
1178                 return -1;
1179         }
1180
1181         evlist->hybrid_pmu_name = perf_pmu__hybrid_type_to_pmu(str);
1182         if (!evlist->hybrid_pmu_name) {
1183                 fprintf(stderr, "--cputype %s is not supported!\n", str);
1184                 return -1;
1185         }
1186
1187         return 0;
1188 }
1189
1190 static struct option stat_options[] = {
1191         OPT_BOOLEAN('T', "transaction", &transaction_run,
1192                     "hardware transaction statistics"),
1193         OPT_CALLBACK('e', "event", &evsel_list, "event",
1194                      "event selector. use 'perf list' to list available events",
1195                      parse_events_option),
1196         OPT_CALLBACK(0, "filter", &evsel_list, "filter",
1197                      "event filter", parse_filter),
1198         OPT_BOOLEAN('i', "no-inherit", &stat_config.no_inherit,
1199                     "child tasks do not inherit counters"),
1200         OPT_STRING('p', "pid", &target.pid, "pid",
1201                    "stat events on existing process id"),
1202         OPT_STRING('t', "tid", &target.tid, "tid",
1203                    "stat events on existing thread id"),
1204 #ifdef HAVE_BPF_SKEL
1205         OPT_STRING('b', "bpf-prog", &target.bpf_str, "bpf-prog-id",
1206                    "stat events on existing bpf program id"),
1207         OPT_BOOLEAN(0, "bpf-counters", &target.use_bpf,
1208                     "use bpf program to count events"),
1209         OPT_STRING(0, "bpf-attr-map", &target.attr_map, "attr-map-path",
1210                    "path to perf_event_attr map"),
1211 #endif
1212         OPT_BOOLEAN('a', "all-cpus", &target.system_wide,
1213                     "system-wide collection from all CPUs"),
1214         OPT_BOOLEAN('g', "group", &group,
1215                     "put the counters into a counter group"),
1216         OPT_BOOLEAN(0, "scale", &stat_config.scale,
1217                     "Use --no-scale to disable counter scaling for multiplexing"),
1218         OPT_INCR('v', "verbose", &verbose,
1219                     "be more verbose (show counter open errors, etc)"),
1220         OPT_INTEGER('r', "repeat", &stat_config.run_count,
1221                     "repeat command and print average + stddev (max: 100, forever: 0)"),
1222         OPT_BOOLEAN(0, "table", &stat_config.walltime_run_table,
1223                     "display details about each run (only with -r option)"),
1224         OPT_BOOLEAN('n', "null", &stat_config.null_run,
1225                     "null run - dont start any counters"),
1226         OPT_INCR('d', "detailed", &detailed_run,
1227                     "detailed run - start a lot of events"),
1228         OPT_BOOLEAN('S', "sync", &sync_run,
1229                     "call sync() before starting a run"),
1230         OPT_CALLBACK_NOOPT('B', "big-num", NULL, NULL,
1231                            "print large numbers with thousands\' separators",
1232                            stat__set_big_num),
1233         OPT_STRING('C', "cpu", &target.cpu_list, "cpu",
1234                     "list of cpus to monitor in system-wide"),
1235         OPT_SET_UINT('A', "no-aggr", &stat_config.aggr_mode,
1236                     "disable CPU count aggregation", AGGR_NONE),
1237         OPT_BOOLEAN(0, "no-merge", &stat_config.no_merge, "Do not merge identical named events"),
1238         OPT_STRING('x', "field-separator", &stat_config.csv_sep, "separator",
1239                    "print counts with custom separator"),
1240         OPT_CALLBACK('G', "cgroup", &evsel_list, "name",
1241                      "monitor event in cgroup name only", parse_stat_cgroups),
1242         OPT_STRING(0, "for-each-cgroup", &stat_config.cgroup_list, "name",
1243                     "expand events for each cgroup"),
1244         OPT_STRING('o', "output", &output_name, "file", "output file name"),
1245         OPT_BOOLEAN(0, "append", &append_file, "append to the output file"),
1246         OPT_INTEGER(0, "log-fd", &output_fd,
1247                     "log output to fd, instead of stderr"),
1248         OPT_STRING(0, "pre", &pre_cmd, "command",
1249                         "command to run prior to the measured command"),
1250         OPT_STRING(0, "post", &post_cmd, "command",
1251                         "command to run after to the measured command"),
1252         OPT_UINTEGER('I', "interval-print", &stat_config.interval,
1253                     "print counts at regular interval in ms "
1254                     "(overhead is possible for values <= 100ms)"),
1255         OPT_INTEGER(0, "interval-count", &stat_config.times,
1256                     "print counts for fixed number of times"),
1257         OPT_BOOLEAN(0, "interval-clear", &stat_config.interval_clear,
1258                     "clear screen in between new interval"),
1259         OPT_UINTEGER(0, "timeout", &stat_config.timeout,
1260                     "stop workload and print counts after a timeout period in ms (>= 10ms)"),
1261         OPT_SET_UINT(0, "per-socket", &stat_config.aggr_mode,
1262                      "aggregate counts per processor socket", AGGR_SOCKET),
1263         OPT_SET_UINT(0, "per-die", &stat_config.aggr_mode,
1264                      "aggregate counts per processor die", AGGR_DIE),
1265         OPT_SET_UINT(0, "per-core", &stat_config.aggr_mode,
1266                      "aggregate counts per physical processor core", AGGR_CORE),
1267         OPT_SET_UINT(0, "per-thread", &stat_config.aggr_mode,
1268                      "aggregate counts per thread", AGGR_THREAD),
1269         OPT_SET_UINT(0, "per-node", &stat_config.aggr_mode,
1270                      "aggregate counts per numa node", AGGR_NODE),
1271         OPT_INTEGER('D', "delay", &stat_config.initial_delay,
1272                     "ms to wait before starting measurement after program start (-1: start with events disabled)"),
1273         OPT_CALLBACK_NOOPT(0, "metric-only", &stat_config.metric_only, NULL,
1274                         "Only print computed metrics. No raw values", enable_metric_only),
1275         OPT_BOOLEAN(0, "metric-no-group", &stat_config.metric_no_group,
1276                        "don't group metric events, impacts multiplexing"),
1277         OPT_BOOLEAN(0, "metric-no-merge", &stat_config.metric_no_merge,
1278                        "don't try to share events between metrics in a group"),
1279         OPT_BOOLEAN(0, "topdown", &topdown_run,
1280                         "measure top-down statistics"),
1281         OPT_UINTEGER(0, "td-level", &stat_config.topdown_level,
1282                         "Set the metrics level for the top-down statistics (0: max level)"),
1283         OPT_BOOLEAN(0, "smi-cost", &smi_cost,
1284                         "measure SMI cost"),
1285         OPT_CALLBACK('M', "metrics", &evsel_list, "metric/metric group list",
1286                      "monitor specified metrics or metric groups (separated by ,)",
1287                      parse_metric_groups),
1288         OPT_BOOLEAN_FLAG(0, "all-kernel", &stat_config.all_kernel,
1289                          "Configure all used events to run in kernel space.",
1290                          PARSE_OPT_EXCLUSIVE),
1291         OPT_BOOLEAN_FLAG(0, "all-user", &stat_config.all_user,
1292                          "Configure all used events to run in user space.",
1293                          PARSE_OPT_EXCLUSIVE),
1294         OPT_BOOLEAN(0, "percore-show-thread", &stat_config.percore_show_thread,
1295                     "Use with 'percore' event qualifier to show the event "
1296                     "counts of one hardware thread by sum up total hardware "
1297                     "threads of same physical core"),
1298         OPT_BOOLEAN(0, "summary", &stat_config.summary,
1299                        "print summary for interval mode"),
1300         OPT_BOOLEAN(0, "no-csv-summary", &stat_config.no_csv_summary,
1301                        "don't print 'summary' for CSV summary output"),
1302         OPT_BOOLEAN(0, "quiet", &stat_config.quiet,
1303                         "don't print output (useful with record)"),
1304         OPT_CALLBACK(0, "cputype", &evsel_list, "hybrid cpu type",
1305                      "Only enable events on applying cpu with this type "
1306                      "for hybrid platform (e.g. core or atom)",
1307                      parse_hybrid_type),
1308 #ifdef HAVE_LIBPFM
1309         OPT_CALLBACK(0, "pfm-events", &evsel_list, "event",
1310                 "libpfm4 event selector. use 'perf list' to list available events",
1311                 parse_libpfm_events_option),
1312 #endif
1313         OPT_CALLBACK(0, "control", &stat_config, "fd:ctl-fd[,ack-fd] or fifo:ctl-fifo[,ack-fifo]",
1314                      "Listen on ctl-fd descriptor for command to control measurement ('enable': enable events, 'disable': disable events).\n"
1315                      "\t\t\t  Optionally send control command completion ('ack\\n') to ack-fd descriptor.\n"
1316                      "\t\t\t  Alternatively, ctl-fifo / ack-fifo will be opened and used as ctl-fd / ack-fd.",
1317                       parse_control_option),
1318         OPT_CALLBACK_OPTARG(0, "iostat", &evsel_list, &stat_config, "default",
1319                             "measure I/O performance metrics provided by arch/platform",
1320                             iostat_parse),
1321         OPT_END()
1322 };
1323
1324 static const char *const aggr_mode__string[] = {
1325         [AGGR_CORE] = "core",
1326         [AGGR_DIE] = "die",
1327         [AGGR_GLOBAL] = "global",
1328         [AGGR_NODE] = "node",
1329         [AGGR_NONE] = "none",
1330         [AGGR_SOCKET] = "socket",
1331         [AGGR_THREAD] = "thread",
1332         [AGGR_UNSET] = "unset",
1333 };
1334
1335 static struct aggr_cpu_id perf_stat__get_socket(struct perf_stat_config *config __maybe_unused,
1336                                                 struct perf_cpu cpu)
1337 {
1338         return aggr_cpu_id__socket(cpu, /*data=*/NULL);
1339 }
1340
1341 static struct aggr_cpu_id perf_stat__get_die(struct perf_stat_config *config __maybe_unused,
1342                                              struct perf_cpu cpu)
1343 {
1344         return aggr_cpu_id__die(cpu, /*data=*/NULL);
1345 }
1346
1347 static struct aggr_cpu_id perf_stat__get_core(struct perf_stat_config *config __maybe_unused,
1348                                               struct perf_cpu cpu)
1349 {
1350         return aggr_cpu_id__core(cpu, /*data=*/NULL);
1351 }
1352
1353 static struct aggr_cpu_id perf_stat__get_node(struct perf_stat_config *config __maybe_unused,
1354                                               struct perf_cpu cpu)
1355 {
1356         return aggr_cpu_id__node(cpu, /*data=*/NULL);
1357 }
1358
1359 static struct aggr_cpu_id perf_stat__get_aggr(struct perf_stat_config *config,
1360                                               aggr_get_id_t get_id, struct perf_cpu cpu)
1361 {
1362         struct aggr_cpu_id id = aggr_cpu_id__empty();
1363
1364         if (aggr_cpu_id__is_empty(&config->cpus_aggr_map->map[cpu.cpu]))
1365                 config->cpus_aggr_map->map[cpu.cpu] = get_id(config, cpu);
1366
1367         id = config->cpus_aggr_map->map[cpu.cpu];
1368         return id;
1369 }
1370
1371 static struct aggr_cpu_id perf_stat__get_socket_cached(struct perf_stat_config *config,
1372                                                        struct perf_cpu cpu)
1373 {
1374         return perf_stat__get_aggr(config, perf_stat__get_socket, cpu);
1375 }
1376
1377 static struct aggr_cpu_id perf_stat__get_die_cached(struct perf_stat_config *config,
1378                                                     struct perf_cpu cpu)
1379 {
1380         return perf_stat__get_aggr(config, perf_stat__get_die, cpu);
1381 }
1382
1383 static struct aggr_cpu_id perf_stat__get_core_cached(struct perf_stat_config *config,
1384                                                      struct perf_cpu cpu)
1385 {
1386         return perf_stat__get_aggr(config, perf_stat__get_core, cpu);
1387 }
1388
1389 static struct aggr_cpu_id perf_stat__get_node_cached(struct perf_stat_config *config,
1390                                                      struct perf_cpu cpu)
1391 {
1392         return perf_stat__get_aggr(config, perf_stat__get_node, cpu);
1393 }
1394
1395 static bool term_percore_set(void)
1396 {
1397         struct evsel *counter;
1398
1399         evlist__for_each_entry(evsel_list, counter) {
1400                 if (counter->percore)
1401                         return true;
1402         }
1403
1404         return false;
1405 }
1406
1407 static aggr_cpu_id_get_t aggr_mode__get_aggr(enum aggr_mode aggr_mode)
1408 {
1409         switch (aggr_mode) {
1410         case AGGR_SOCKET:
1411                 return aggr_cpu_id__socket;
1412         case AGGR_DIE:
1413                 return aggr_cpu_id__die;
1414         case AGGR_CORE:
1415                 return aggr_cpu_id__core;
1416         case AGGR_NODE:
1417                 return aggr_cpu_id__node;
1418         case AGGR_NONE:
1419                 if (term_percore_set())
1420                         return aggr_cpu_id__core;
1421
1422                 return NULL;
1423         case AGGR_GLOBAL:
1424         case AGGR_THREAD:
1425         case AGGR_UNSET:
1426         default:
1427                 return NULL;
1428         }
1429 }
1430
1431 static aggr_get_id_t aggr_mode__get_id(enum aggr_mode aggr_mode)
1432 {
1433         switch (aggr_mode) {
1434         case AGGR_SOCKET:
1435                 return perf_stat__get_socket_cached;
1436         case AGGR_DIE:
1437                 return perf_stat__get_die_cached;
1438         case AGGR_CORE:
1439                 return perf_stat__get_core_cached;
1440         case AGGR_NODE:
1441                 return perf_stat__get_node_cached;
1442         case AGGR_NONE:
1443                 if (term_percore_set()) {
1444                         return perf_stat__get_core_cached;
1445                 }
1446                 return NULL;
1447         case AGGR_GLOBAL:
1448         case AGGR_THREAD:
1449         case AGGR_UNSET:
1450         default:
1451                 return NULL;
1452         }
1453 }
1454
1455 static int perf_stat_init_aggr_mode(void)
1456 {
1457         int nr;
1458         aggr_cpu_id_get_t get_id = aggr_mode__get_aggr(stat_config.aggr_mode);
1459
1460         if (get_id) {
1461                 stat_config.aggr_map = cpu_aggr_map__new(evsel_list->core.user_requested_cpus,
1462                                                          get_id, /*data=*/NULL);
1463                 if (!stat_config.aggr_map) {
1464                         pr_err("cannot build %s map", aggr_mode__string[stat_config.aggr_mode]);
1465                         return -1;
1466                 }
1467                 stat_config.aggr_get_id = aggr_mode__get_id(stat_config.aggr_mode);
1468         }
1469
1470         /*
1471          * The evsel_list->cpus is the base we operate on,
1472          * taking the highest cpu number to be the size of
1473          * the aggregation translate cpumap.
1474          */
1475         if (evsel_list->core.user_requested_cpus)
1476                 nr = perf_cpu_map__max(evsel_list->core.user_requested_cpus).cpu;
1477         else
1478                 nr = 0;
1479         stat_config.cpus_aggr_map = cpu_aggr_map__empty_new(nr + 1);
1480         return stat_config.cpus_aggr_map ? 0 : -ENOMEM;
1481 }
1482
1483 static void cpu_aggr_map__delete(struct cpu_aggr_map *map)
1484 {
1485         if (map) {
1486                 WARN_ONCE(refcount_read(&map->refcnt) != 0,
1487                           "cpu_aggr_map refcnt unbalanced\n");
1488                 free(map);
1489         }
1490 }
1491
1492 static void cpu_aggr_map__put(struct cpu_aggr_map *map)
1493 {
1494         if (map && refcount_dec_and_test(&map->refcnt))
1495                 cpu_aggr_map__delete(map);
1496 }
1497
1498 static void perf_stat__exit_aggr_mode(void)
1499 {
1500         cpu_aggr_map__put(stat_config.aggr_map);
1501         cpu_aggr_map__put(stat_config.cpus_aggr_map);
1502         stat_config.aggr_map = NULL;
1503         stat_config.cpus_aggr_map = NULL;
1504 }
1505
1506 static struct aggr_cpu_id perf_env__get_socket_aggr_by_cpu(struct perf_cpu cpu, void *data)
1507 {
1508         struct perf_env *env = data;
1509         struct aggr_cpu_id id = aggr_cpu_id__empty();
1510
1511         if (cpu.cpu != -1)
1512                 id.socket = env->cpu[cpu.cpu].socket_id;
1513
1514         return id;
1515 }
1516
1517 static struct aggr_cpu_id perf_env__get_die_aggr_by_cpu(struct perf_cpu cpu, void *data)
1518 {
1519         struct perf_env *env = data;
1520         struct aggr_cpu_id id = aggr_cpu_id__empty();
1521
1522         if (cpu.cpu != -1) {
1523                 /*
1524                  * die_id is relative to socket, so start
1525                  * with the socket ID and then add die to
1526                  * make a unique ID.
1527                  */
1528                 id.socket = env->cpu[cpu.cpu].socket_id;
1529                 id.die = env->cpu[cpu.cpu].die_id;
1530         }
1531
1532         return id;
1533 }
1534
1535 static struct aggr_cpu_id perf_env__get_core_aggr_by_cpu(struct perf_cpu cpu, void *data)
1536 {
1537         struct perf_env *env = data;
1538         struct aggr_cpu_id id = aggr_cpu_id__empty();
1539
1540         if (cpu.cpu != -1) {
1541                 /*
1542                  * core_id is relative to socket and die,
1543                  * we need a global id. So we set
1544                  * socket, die id and core id
1545                  */
1546                 id.socket = env->cpu[cpu.cpu].socket_id;
1547                 id.die = env->cpu[cpu.cpu].die_id;
1548                 id.core = env->cpu[cpu.cpu].core_id;
1549         }
1550
1551         return id;
1552 }
1553
1554 static struct aggr_cpu_id perf_env__get_node_aggr_by_cpu(struct perf_cpu cpu, void *data)
1555 {
1556         struct aggr_cpu_id id = aggr_cpu_id__empty();
1557
1558         id.node = perf_env__numa_node(data, cpu);
1559         return id;
1560 }
1561
1562 static struct aggr_cpu_id perf_stat__get_socket_file(struct perf_stat_config *config __maybe_unused,
1563                                                      struct perf_cpu cpu)
1564 {
1565         return perf_env__get_socket_aggr_by_cpu(cpu, &perf_stat.session->header.env);
1566 }
1567 static struct aggr_cpu_id perf_stat__get_die_file(struct perf_stat_config *config __maybe_unused,
1568                                                   struct perf_cpu cpu)
1569 {
1570         return perf_env__get_die_aggr_by_cpu(cpu, &perf_stat.session->header.env);
1571 }
1572
1573 static struct aggr_cpu_id perf_stat__get_core_file(struct perf_stat_config *config __maybe_unused,
1574                                                    struct perf_cpu cpu)
1575 {
1576         return perf_env__get_core_aggr_by_cpu(cpu, &perf_stat.session->header.env);
1577 }
1578
1579 static struct aggr_cpu_id perf_stat__get_node_file(struct perf_stat_config *config __maybe_unused,
1580                                                    struct perf_cpu cpu)
1581 {
1582         return perf_env__get_node_aggr_by_cpu(cpu, &perf_stat.session->header.env);
1583 }
1584
1585 static aggr_cpu_id_get_t aggr_mode__get_aggr_file(enum aggr_mode aggr_mode)
1586 {
1587         switch (aggr_mode) {
1588         case AGGR_SOCKET:
1589                 return perf_env__get_socket_aggr_by_cpu;
1590         case AGGR_DIE:
1591                 return perf_env__get_die_aggr_by_cpu;
1592         case AGGR_CORE:
1593                 return perf_env__get_core_aggr_by_cpu;
1594         case AGGR_NODE:
1595                 return perf_env__get_node_aggr_by_cpu;
1596         case AGGR_NONE:
1597         case AGGR_GLOBAL:
1598         case AGGR_THREAD:
1599         case AGGR_UNSET:
1600         default:
1601                 return NULL;
1602         }
1603 }
1604
1605 static aggr_get_id_t aggr_mode__get_id_file(enum aggr_mode aggr_mode)
1606 {
1607         switch (aggr_mode) {
1608         case AGGR_SOCKET:
1609                 return perf_stat__get_socket_file;
1610         case AGGR_DIE:
1611                 return perf_stat__get_die_file;
1612         case AGGR_CORE:
1613                 return perf_stat__get_core_file;
1614         case AGGR_NODE:
1615                 return perf_stat__get_node_file;
1616         case AGGR_NONE:
1617         case AGGR_GLOBAL:
1618         case AGGR_THREAD:
1619         case AGGR_UNSET:
1620         default:
1621                 return NULL;
1622         }
1623 }
1624
1625 static int perf_stat_init_aggr_mode_file(struct perf_stat *st)
1626 {
1627         struct perf_env *env = &st->session->header.env;
1628         aggr_cpu_id_get_t get_id = aggr_mode__get_aggr_file(stat_config.aggr_mode);
1629
1630         if (!get_id)
1631                 return 0;
1632
1633         stat_config.aggr_map = cpu_aggr_map__new(evsel_list->core.user_requested_cpus, get_id, env);
1634         if (!stat_config.aggr_map) {
1635                 pr_err("cannot build %s map", aggr_mode__string[stat_config.aggr_mode]);
1636                 return -1;
1637         }
1638         stat_config.aggr_get_id = aggr_mode__get_id_file(stat_config.aggr_mode);
1639         return 0;
1640 }
1641
1642 /*
1643  * Add default attributes, if there were no attributes specified or
1644  * if -d/--detailed, -d -d or -d -d -d is used:
1645  */
1646 static int add_default_attributes(void)
1647 {
1648         int err;
1649         struct perf_event_attr default_attrs0[] = {
1650
1651   { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_TASK_CLOCK              },
1652   { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_CONTEXT_SWITCHES        },
1653   { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_CPU_MIGRATIONS          },
1654   { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_PAGE_FAULTS             },
1655
1656   { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_CPU_CYCLES              },
1657 };
1658         struct perf_event_attr frontend_attrs[] = {
1659   { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_STALLED_CYCLES_FRONTEND },
1660 };
1661         struct perf_event_attr backend_attrs[] = {
1662   { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_STALLED_CYCLES_BACKEND  },
1663 };
1664         struct perf_event_attr default_attrs1[] = {
1665   { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_INSTRUCTIONS            },
1666   { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_BRANCH_INSTRUCTIONS     },
1667   { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_BRANCH_MISSES           },
1668
1669 };
1670         struct perf_event_attr default_sw_attrs[] = {
1671   { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_TASK_CLOCK              },
1672   { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_CONTEXT_SWITCHES        },
1673   { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_CPU_MIGRATIONS          },
1674   { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_PAGE_FAULTS             },
1675 };
1676
1677 /*
1678  * Detailed stats (-d), covering the L1 and last level data caches:
1679  */
1680         struct perf_event_attr detailed_attrs[] = {
1681
1682   { .type = PERF_TYPE_HW_CACHE,
1683     .config =
1684          PERF_COUNT_HW_CACHE_L1D                <<  0  |
1685         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
1686         (PERF_COUNT_HW_CACHE_RESULT_ACCESS      << 16)                          },
1687
1688   { .type = PERF_TYPE_HW_CACHE,
1689     .config =
1690          PERF_COUNT_HW_CACHE_L1D                <<  0  |
1691         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
1692         (PERF_COUNT_HW_CACHE_RESULT_MISS        << 16)                          },
1693
1694   { .type = PERF_TYPE_HW_CACHE,
1695     .config =
1696          PERF_COUNT_HW_CACHE_LL                 <<  0  |
1697         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
1698         (PERF_COUNT_HW_CACHE_RESULT_ACCESS      << 16)                          },
1699
1700   { .type = PERF_TYPE_HW_CACHE,
1701     .config =
1702          PERF_COUNT_HW_CACHE_LL                 <<  0  |
1703         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
1704         (PERF_COUNT_HW_CACHE_RESULT_MISS        << 16)                          },
1705 };
1706
1707 /*
1708  * Very detailed stats (-d -d), covering the instruction cache and the TLB caches:
1709  */
1710         struct perf_event_attr very_detailed_attrs[] = {
1711
1712   { .type = PERF_TYPE_HW_CACHE,
1713     .config =
1714          PERF_COUNT_HW_CACHE_L1I                <<  0  |
1715         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
1716         (PERF_COUNT_HW_CACHE_RESULT_ACCESS      << 16)                          },
1717
1718   { .type = PERF_TYPE_HW_CACHE,
1719     .config =
1720          PERF_COUNT_HW_CACHE_L1I                <<  0  |
1721         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
1722         (PERF_COUNT_HW_CACHE_RESULT_MISS        << 16)                          },
1723
1724   { .type = PERF_TYPE_HW_CACHE,
1725     .config =
1726          PERF_COUNT_HW_CACHE_DTLB               <<  0  |
1727         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
1728         (PERF_COUNT_HW_CACHE_RESULT_ACCESS      << 16)                          },
1729
1730   { .type = PERF_TYPE_HW_CACHE,
1731     .config =
1732          PERF_COUNT_HW_CACHE_DTLB               <<  0  |
1733         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
1734         (PERF_COUNT_HW_CACHE_RESULT_MISS        << 16)                          },
1735
1736   { .type = PERF_TYPE_HW_CACHE,
1737     .config =
1738          PERF_COUNT_HW_CACHE_ITLB               <<  0  |
1739         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
1740         (PERF_COUNT_HW_CACHE_RESULT_ACCESS      << 16)                          },
1741
1742   { .type = PERF_TYPE_HW_CACHE,
1743     .config =
1744          PERF_COUNT_HW_CACHE_ITLB               <<  0  |
1745         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
1746         (PERF_COUNT_HW_CACHE_RESULT_MISS        << 16)                          },
1747
1748 };
1749
1750 /*
1751  * Very, very detailed stats (-d -d -d), adding prefetch events:
1752  */
1753         struct perf_event_attr very_very_detailed_attrs[] = {
1754
1755   { .type = PERF_TYPE_HW_CACHE,
1756     .config =
1757          PERF_COUNT_HW_CACHE_L1D                <<  0  |
1758         (PERF_COUNT_HW_CACHE_OP_PREFETCH        <<  8) |
1759         (PERF_COUNT_HW_CACHE_RESULT_ACCESS      << 16)                          },
1760
1761   { .type = PERF_TYPE_HW_CACHE,
1762     .config =
1763          PERF_COUNT_HW_CACHE_L1D                <<  0  |
1764         (PERF_COUNT_HW_CACHE_OP_PREFETCH        <<  8) |
1765         (PERF_COUNT_HW_CACHE_RESULT_MISS        << 16)                          },
1766 };
1767         /* Set attrs if no event is selected and !null_run: */
1768         if (stat_config.null_run)
1769                 return 0;
1770
1771         if (transaction_run) {
1772                 struct parse_events_error errinfo;
1773                 /* Handle -T as -M transaction. Once platform specific metrics
1774                  * support has been added to the json files, all architectures
1775                  * will use this approach. To determine transaction support
1776                  * on an architecture test for such a metric name.
1777                  */
1778                 if (metricgroup__has_metric("transaction")) {
1779                         struct option opt = { .value = &evsel_list };
1780
1781                         return metricgroup__parse_groups(&opt, "transaction",
1782                                                          stat_config.metric_no_group,
1783                                                         stat_config.metric_no_merge,
1784                                                          &stat_config.metric_events);
1785                 }
1786
1787                 parse_events_error__init(&errinfo);
1788                 if (pmu_have_event("cpu", "cycles-ct") &&
1789                     pmu_have_event("cpu", "el-start"))
1790                         err = parse_events(evsel_list, transaction_attrs,
1791                                            &errinfo);
1792                 else
1793                         err = parse_events(evsel_list,
1794                                            transaction_limited_attrs,
1795                                            &errinfo);
1796                 if (err) {
1797                         fprintf(stderr, "Cannot set up transaction events\n");
1798                         parse_events_error__print(&errinfo, transaction_attrs);
1799                 }
1800                 parse_events_error__exit(&errinfo);
1801                 return err ? -1 : 0;
1802         }
1803
1804         if (smi_cost) {
1805                 struct parse_events_error errinfo;
1806                 int smi;
1807
1808                 if (sysfs__read_int(FREEZE_ON_SMI_PATH, &smi) < 0) {
1809                         fprintf(stderr, "freeze_on_smi is not supported.\n");
1810                         return -1;
1811                 }
1812
1813                 if (!smi) {
1814                         if (sysfs__write_int(FREEZE_ON_SMI_PATH, 1) < 0) {
1815                                 fprintf(stderr, "Failed to set freeze_on_smi.\n");
1816                                 return -1;
1817                         }
1818                         smi_reset = true;
1819                 }
1820
1821                 if (!pmu_have_event("msr", "aperf") ||
1822                     !pmu_have_event("msr", "smi")) {
1823                         fprintf(stderr, "To measure SMI cost, it needs "
1824                                 "msr/aperf/, msr/smi/ and cpu/cycles/ support\n");
1825                         return -1;
1826                 }
1827                 if (!force_metric_only)
1828                         stat_config.metric_only = true;
1829
1830                 parse_events_error__init(&errinfo);
1831                 err = parse_events(evsel_list, smi_cost_attrs, &errinfo);
1832                 if (err) {
1833                         parse_events_error__print(&errinfo, smi_cost_attrs);
1834                         fprintf(stderr, "Cannot set up SMI cost events\n");
1835                 }
1836                 parse_events_error__exit(&errinfo);
1837                 return err ? -1 : 0;
1838         }
1839
1840         if (topdown_run) {
1841                 const char **metric_attrs = topdown_metric_attrs;
1842                 unsigned int max_level = 1;
1843                 char *str = NULL;
1844                 bool warn = false;
1845
1846                 if (!force_metric_only)
1847                         stat_config.metric_only = true;
1848
1849                 if (pmu_have_event("cpu", topdown_metric_L2_attrs[5])) {
1850                         metric_attrs = topdown_metric_L2_attrs;
1851                         max_level = 2;
1852                 }
1853
1854                 if (stat_config.topdown_level > max_level) {
1855                         pr_err("Invalid top-down metrics level. The max level is %u.\n", max_level);
1856                         return -1;
1857                 } else if (!stat_config.topdown_level)
1858                         stat_config.topdown_level = max_level;
1859
1860                 if (topdown_filter_events(metric_attrs, &str, 1) < 0) {
1861                         pr_err("Out of memory\n");
1862                         return -1;
1863                 }
1864                 if (metric_attrs[0] && str) {
1865                         if (!stat_config.interval && !stat_config.metric_only) {
1866                                 fprintf(stat_config.output,
1867                                         "Topdown accuracy may decrease when measuring long periods.\n"
1868                                         "Please print the result regularly, e.g. -I1000\n");
1869                         }
1870                         goto setup_metrics;
1871                 }
1872
1873                 zfree(&str);
1874
1875                 if (stat_config.aggr_mode != AGGR_GLOBAL &&
1876                     stat_config.aggr_mode != AGGR_CORE) {
1877                         pr_err("top down event configuration requires --per-core mode\n");
1878                         return -1;
1879                 }
1880                 stat_config.aggr_mode = AGGR_CORE;
1881                 if (nr_cgroups || !target__has_cpu(&target)) {
1882                         pr_err("top down event configuration requires system-wide mode (-a)\n");
1883                         return -1;
1884                 }
1885
1886                 if (topdown_filter_events(topdown_attrs, &str,
1887                                 arch_topdown_check_group(&warn)) < 0) {
1888                         pr_err("Out of memory\n");
1889                         return -1;
1890                 }
1891                 if (topdown_attrs[0] && str) {
1892                         struct parse_events_error errinfo;
1893                         if (warn)
1894                                 arch_topdown_group_warn();
1895 setup_metrics:
1896                         parse_events_error__init(&errinfo);
1897                         err = parse_events(evsel_list, str, &errinfo);
1898                         if (err) {
1899                                 fprintf(stderr,
1900                                         "Cannot set up top down events %s: %d\n",
1901                                         str, err);
1902                                 parse_events_error__print(&errinfo, str);
1903                                 parse_events_error__exit(&errinfo);
1904                                 free(str);
1905                                 return -1;
1906                         }
1907                         parse_events_error__exit(&errinfo);
1908                 } else {
1909                         fprintf(stderr, "System does not support topdown\n");
1910                         return -1;
1911                 }
1912                 free(str);
1913         }
1914
1915         if (!evsel_list->core.nr_entries) {
1916                 if (perf_pmu__has_hybrid()) {
1917                         struct parse_events_error errinfo;
1918                         const char *hybrid_str = "cycles,instructions,branches,branch-misses";
1919
1920                         if (target__has_cpu(&target))
1921                                 default_sw_attrs[0].config = PERF_COUNT_SW_CPU_CLOCK;
1922
1923                         if (evlist__add_default_attrs(evsel_list,
1924                                                       default_sw_attrs) < 0) {
1925                                 return -1;
1926                         }
1927
1928                         parse_events_error__init(&errinfo);
1929                         err = parse_events(evsel_list, hybrid_str, &errinfo);
1930                         if (err) {
1931                                 fprintf(stderr,
1932                                         "Cannot set up hybrid events %s: %d\n",
1933                                         hybrid_str, err);
1934                                 parse_events_error__print(&errinfo, hybrid_str);
1935                         }
1936                         parse_events_error__exit(&errinfo);
1937                         return err ? -1 : 0;
1938                 }
1939
1940                 if (target__has_cpu(&target))
1941                         default_attrs0[0].config = PERF_COUNT_SW_CPU_CLOCK;
1942
1943                 if (evlist__add_default_attrs(evsel_list, default_attrs0) < 0)
1944                         return -1;
1945                 if (pmu_have_event("cpu", "stalled-cycles-frontend")) {
1946                         if (evlist__add_default_attrs(evsel_list, frontend_attrs) < 0)
1947                                 return -1;
1948                 }
1949                 if (pmu_have_event("cpu", "stalled-cycles-backend")) {
1950                         if (evlist__add_default_attrs(evsel_list, backend_attrs) < 0)
1951                                 return -1;
1952                 }
1953                 if (evlist__add_default_attrs(evsel_list, default_attrs1) < 0)
1954                         return -1;
1955
1956                 stat_config.topdown_level = TOPDOWN_MAX_LEVEL;
1957                 if (arch_evlist__add_default_attrs(evsel_list) < 0)
1958                         return -1;
1959         }
1960
1961         /* Detailed events get appended to the event list: */
1962
1963         if (detailed_run <  1)
1964                 return 0;
1965
1966         /* Append detailed run extra attributes: */
1967         if (evlist__add_default_attrs(evsel_list, detailed_attrs) < 0)
1968                 return -1;
1969
1970         if (detailed_run < 2)
1971                 return 0;
1972
1973         /* Append very detailed run extra attributes: */
1974         if (evlist__add_default_attrs(evsel_list, very_detailed_attrs) < 0)
1975                 return -1;
1976
1977         if (detailed_run < 3)
1978                 return 0;
1979
1980         /* Append very, very detailed run extra attributes: */
1981         return evlist__add_default_attrs(evsel_list, very_very_detailed_attrs);
1982 }
1983
1984 static const char * const stat_record_usage[] = {
1985         "perf stat record [<options>]",
1986         NULL,
1987 };
1988
1989 static void init_features(struct perf_session *session)
1990 {
1991         int feat;
1992
1993         for (feat = HEADER_FIRST_FEATURE; feat < HEADER_LAST_FEATURE; feat++)
1994                 perf_header__set_feat(&session->header, feat);
1995
1996         perf_header__clear_feat(&session->header, HEADER_DIR_FORMAT);
1997         perf_header__clear_feat(&session->header, HEADER_BUILD_ID);
1998         perf_header__clear_feat(&session->header, HEADER_TRACING_DATA);
1999         perf_header__clear_feat(&session->header, HEADER_BRANCH_STACK);
2000         perf_header__clear_feat(&session->header, HEADER_AUXTRACE);
2001 }
2002
2003 static int __cmd_record(int argc, const char **argv)
2004 {
2005         struct perf_session *session;
2006         struct perf_data *data = &perf_stat.data;
2007
2008         argc = parse_options(argc, argv, stat_options, stat_record_usage,
2009                              PARSE_OPT_STOP_AT_NON_OPTION);
2010
2011         if (output_name)
2012                 data->path = output_name;
2013
2014         if (stat_config.run_count != 1 || forever) {
2015                 pr_err("Cannot use -r option with perf stat record.\n");
2016                 return -1;
2017         }
2018
2019         session = perf_session__new(data, NULL);
2020         if (IS_ERR(session)) {
2021                 pr_err("Perf session creation failed\n");
2022                 return PTR_ERR(session);
2023         }
2024
2025         init_features(session);
2026
2027         session->evlist   = evsel_list;
2028         perf_stat.session = session;
2029         perf_stat.record  = true;
2030         return argc;
2031 }
2032
2033 static int process_stat_round_event(struct perf_session *session,
2034                                     union perf_event *event)
2035 {
2036         struct perf_record_stat_round *stat_round = &event->stat_round;
2037         struct evsel *counter;
2038         struct timespec tsh, *ts = NULL;
2039         const char **argv = session->header.env.cmdline_argv;
2040         int argc = session->header.env.nr_cmdline;
2041
2042         evlist__for_each_entry(evsel_list, counter)
2043                 perf_stat_process_counter(&stat_config, counter);
2044
2045         if (stat_round->type == PERF_STAT_ROUND_TYPE__FINAL)
2046                 update_stats(&walltime_nsecs_stats, stat_round->time);
2047
2048         if (stat_config.interval && stat_round->time) {
2049                 tsh.tv_sec  = stat_round->time / NSEC_PER_SEC;
2050                 tsh.tv_nsec = stat_round->time % NSEC_PER_SEC;
2051                 ts = &tsh;
2052         }
2053
2054         print_counters(ts, argc, argv);
2055         return 0;
2056 }
2057
2058 static
2059 int process_stat_config_event(struct perf_session *session,
2060                               union perf_event *event)
2061 {
2062         struct perf_tool *tool = session->tool;
2063         struct perf_stat *st = container_of(tool, struct perf_stat, tool);
2064
2065         perf_event__read_stat_config(&stat_config, &event->stat_config);
2066
2067         if (perf_cpu_map__empty(st->cpus)) {
2068                 if (st->aggr_mode != AGGR_UNSET)
2069                         pr_warning("warning: processing task data, aggregation mode not set\n");
2070                 return 0;
2071         }
2072
2073         if (st->aggr_mode != AGGR_UNSET)
2074                 stat_config.aggr_mode = st->aggr_mode;
2075
2076         if (perf_stat.data.is_pipe)
2077                 perf_stat_init_aggr_mode();
2078         else
2079                 perf_stat_init_aggr_mode_file(st);
2080
2081         return 0;
2082 }
2083
2084 static int set_maps(struct perf_stat *st)
2085 {
2086         if (!st->cpus || !st->threads)
2087                 return 0;
2088
2089         if (WARN_ONCE(st->maps_allocated, "stats double allocation\n"))
2090                 return -EINVAL;
2091
2092         perf_evlist__set_maps(&evsel_list->core, st->cpus, st->threads);
2093
2094         if (evlist__alloc_stats(evsel_list, true))
2095                 return -ENOMEM;
2096
2097         st->maps_allocated = true;
2098         return 0;
2099 }
2100
2101 static
2102 int process_thread_map_event(struct perf_session *session,
2103                              union perf_event *event)
2104 {
2105         struct perf_tool *tool = session->tool;
2106         struct perf_stat *st = container_of(tool, struct perf_stat, tool);
2107
2108         if (st->threads) {
2109                 pr_warning("Extra thread map event, ignoring.\n");
2110                 return 0;
2111         }
2112
2113         st->threads = thread_map__new_event(&event->thread_map);
2114         if (!st->threads)
2115                 return -ENOMEM;
2116
2117         return set_maps(st);
2118 }
2119
2120 static
2121 int process_cpu_map_event(struct perf_session *session,
2122                           union perf_event *event)
2123 {
2124         struct perf_tool *tool = session->tool;
2125         struct perf_stat *st = container_of(tool, struct perf_stat, tool);
2126         struct perf_cpu_map *cpus;
2127
2128         if (st->cpus) {
2129                 pr_warning("Extra cpu map event, ignoring.\n");
2130                 return 0;
2131         }
2132
2133         cpus = cpu_map__new_data(&event->cpu_map.data);
2134         if (!cpus)
2135                 return -ENOMEM;
2136
2137         st->cpus = cpus;
2138         return set_maps(st);
2139 }
2140
2141 static const char * const stat_report_usage[] = {
2142         "perf stat report [<options>]",
2143         NULL,
2144 };
2145
2146 static struct perf_stat perf_stat = {
2147         .tool = {
2148                 .attr           = perf_event__process_attr,
2149                 .event_update   = perf_event__process_event_update,
2150                 .thread_map     = process_thread_map_event,
2151                 .cpu_map        = process_cpu_map_event,
2152                 .stat_config    = process_stat_config_event,
2153                 .stat           = perf_event__process_stat_event,
2154                 .stat_round     = process_stat_round_event,
2155         },
2156         .aggr_mode = AGGR_UNSET,
2157 };
2158
2159 static int __cmd_report(int argc, const char **argv)
2160 {
2161         struct perf_session *session;
2162         const struct option options[] = {
2163         OPT_STRING('i', "input", &input_name, "file", "input file name"),
2164         OPT_SET_UINT(0, "per-socket", &perf_stat.aggr_mode,
2165                      "aggregate counts per processor socket", AGGR_SOCKET),
2166         OPT_SET_UINT(0, "per-die", &perf_stat.aggr_mode,
2167                      "aggregate counts per processor die", AGGR_DIE),
2168         OPT_SET_UINT(0, "per-core", &perf_stat.aggr_mode,
2169                      "aggregate counts per physical processor core", AGGR_CORE),
2170         OPT_SET_UINT(0, "per-node", &perf_stat.aggr_mode,
2171                      "aggregate counts per numa node", AGGR_NODE),
2172         OPT_SET_UINT('A', "no-aggr", &perf_stat.aggr_mode,
2173                      "disable CPU count aggregation", AGGR_NONE),
2174         OPT_END()
2175         };
2176         struct stat st;
2177         int ret;
2178
2179         argc = parse_options(argc, argv, options, stat_report_usage, 0);
2180
2181         if (!input_name || !strlen(input_name)) {
2182                 if (!fstat(STDIN_FILENO, &st) && S_ISFIFO(st.st_mode))
2183                         input_name = "-";
2184                 else
2185                         input_name = "perf.data";
2186         }
2187
2188         perf_stat.data.path = input_name;
2189         perf_stat.data.mode = PERF_DATA_MODE_READ;
2190
2191         session = perf_session__new(&perf_stat.data, &perf_stat.tool);
2192         if (IS_ERR(session))
2193                 return PTR_ERR(session);
2194
2195         perf_stat.session  = session;
2196         stat_config.output = stderr;
2197         evsel_list         = session->evlist;
2198
2199         ret = perf_session__process_events(session);
2200         if (ret)
2201                 return ret;
2202
2203         perf_session__delete(session);
2204         return 0;
2205 }
2206
2207 static void setup_system_wide(int forks)
2208 {
2209         /*
2210          * Make system wide (-a) the default target if
2211          * no target was specified and one of following
2212          * conditions is met:
2213          *
2214          *   - there's no workload specified
2215          *   - there is workload specified but all requested
2216          *     events are system wide events
2217          */
2218         if (!target__none(&target))
2219                 return;
2220
2221         if (!forks)
2222                 target.system_wide = true;
2223         else {
2224                 struct evsel *counter;
2225
2226                 evlist__for_each_entry(evsel_list, counter) {
2227                         if (!counter->core.system_wide &&
2228                             strcmp(counter->name, "duration_time")) {
2229                                 return;
2230                         }
2231                 }
2232
2233                 if (evsel_list->core.nr_entries)
2234                         target.system_wide = true;
2235         }
2236 }
2237
2238 int cmd_stat(int argc, const char **argv)
2239 {
2240         const char * const stat_usage[] = {
2241                 "perf stat [<options>] [<command>]",
2242                 NULL
2243         };
2244         int status = -EINVAL, run_idx, err;
2245         const char *mode;
2246         FILE *output = stderr;
2247         unsigned int interval, timeout;
2248         const char * const stat_subcommands[] = { "record", "report" };
2249         char errbuf[BUFSIZ];
2250
2251         setlocale(LC_ALL, "");
2252
2253         evsel_list = evlist__new();
2254         if (evsel_list == NULL)
2255                 return -ENOMEM;
2256
2257         parse_events__shrink_config_terms();
2258
2259         /* String-parsing callback-based options would segfault when negated */
2260         set_option_flag(stat_options, 'e', "event", PARSE_OPT_NONEG);
2261         set_option_flag(stat_options, 'M', "metrics", PARSE_OPT_NONEG);
2262         set_option_flag(stat_options, 'G', "cgroup", PARSE_OPT_NONEG);
2263
2264         argc = parse_options_subcommand(argc, argv, stat_options, stat_subcommands,
2265                                         (const char **) stat_usage,
2266                                         PARSE_OPT_STOP_AT_NON_OPTION);
2267         perf_stat__collect_metric_expr(evsel_list);
2268         perf_stat__init_shadow_stats();
2269
2270         if (stat_config.csv_sep) {
2271                 stat_config.csv_output = true;
2272                 if (!strcmp(stat_config.csv_sep, "\\t"))
2273                         stat_config.csv_sep = "\t";
2274         } else
2275                 stat_config.csv_sep = DEFAULT_SEPARATOR;
2276
2277         if (argc && strlen(argv[0]) > 2 && strstarts("record", argv[0])) {
2278                 argc = __cmd_record(argc, argv);
2279                 if (argc < 0)
2280                         return -1;
2281         } else if (argc && strlen(argv[0]) > 2 && strstarts("report", argv[0]))
2282                 return __cmd_report(argc, argv);
2283
2284         interval = stat_config.interval;
2285         timeout = stat_config.timeout;
2286
2287         /*
2288          * For record command the -o is already taken care of.
2289          */
2290         if (!STAT_RECORD && output_name && strcmp(output_name, "-"))
2291                 output = NULL;
2292
2293         if (output_name && output_fd) {
2294                 fprintf(stderr, "cannot use both --output and --log-fd\n");
2295                 parse_options_usage(stat_usage, stat_options, "o", 1);
2296                 parse_options_usage(NULL, stat_options, "log-fd", 0);
2297                 goto out;
2298         }
2299
2300         if (stat_config.metric_only && stat_config.aggr_mode == AGGR_THREAD) {
2301                 fprintf(stderr, "--metric-only is not supported with --per-thread\n");
2302                 goto out;
2303         }
2304
2305         if (stat_config.metric_only && stat_config.run_count > 1) {
2306                 fprintf(stderr, "--metric-only is not supported with -r\n");
2307                 goto out;
2308         }
2309
2310         if (stat_config.walltime_run_table && stat_config.run_count <= 1) {
2311                 fprintf(stderr, "--table is only supported with -r\n");
2312                 parse_options_usage(stat_usage, stat_options, "r", 1);
2313                 parse_options_usage(NULL, stat_options, "table", 0);
2314                 goto out;
2315         }
2316
2317         if (output_fd < 0) {
2318                 fprintf(stderr, "argument to --log-fd must be a > 0\n");
2319                 parse_options_usage(stat_usage, stat_options, "log-fd", 0);
2320                 goto out;
2321         }
2322
2323         if (!output && !stat_config.quiet) {
2324                 struct timespec tm;
2325                 mode = append_file ? "a" : "w";
2326
2327                 output = fopen(output_name, mode);
2328                 if (!output) {
2329                         perror("failed to create output file");
2330                         return -1;
2331                 }
2332                 clock_gettime(CLOCK_REALTIME, &tm);
2333                 fprintf(output, "# started on %s\n", ctime(&tm.tv_sec));
2334         } else if (output_fd > 0) {
2335                 mode = append_file ? "a" : "w";
2336                 output = fdopen(output_fd, mode);
2337                 if (!output) {
2338                         perror("Failed opening logfd");
2339                         return -errno;
2340                 }
2341         }
2342
2343         stat_config.output = output;
2344
2345         /*
2346          * let the spreadsheet do the pretty-printing
2347          */
2348         if (stat_config.csv_output) {
2349                 /* User explicitly passed -B? */
2350                 if (big_num_opt == 1) {
2351                         fprintf(stderr, "-B option not supported with -x\n");
2352                         parse_options_usage(stat_usage, stat_options, "B", 1);
2353                         parse_options_usage(NULL, stat_options, "x", 1);
2354                         goto out;
2355                 } else /* Nope, so disable big number formatting */
2356                         stat_config.big_num = false;
2357         } else if (big_num_opt == 0) /* User passed --no-big-num */
2358                 stat_config.big_num = false;
2359
2360         err = target__validate(&target);
2361         if (err) {
2362                 target__strerror(&target, err, errbuf, BUFSIZ);
2363                 pr_warning("%s\n", errbuf);
2364         }
2365
2366         setup_system_wide(argc);
2367
2368         /*
2369          * Display user/system times only for single
2370          * run and when there's specified tracee.
2371          */
2372         if ((stat_config.run_count == 1) && target__none(&target))
2373                 stat_config.ru_display = true;
2374
2375         if (stat_config.run_count < 0) {
2376                 pr_err("Run count must be a positive number\n");
2377                 parse_options_usage(stat_usage, stat_options, "r", 1);
2378                 goto out;
2379         } else if (stat_config.run_count == 0) {
2380                 forever = true;
2381                 stat_config.run_count = 1;
2382         }
2383
2384         if (stat_config.walltime_run_table) {
2385                 stat_config.walltime_run = zalloc(stat_config.run_count * sizeof(stat_config.walltime_run[0]));
2386                 if (!stat_config.walltime_run) {
2387                         pr_err("failed to setup -r option");
2388                         goto out;
2389                 }
2390         }
2391
2392         if ((stat_config.aggr_mode == AGGR_THREAD) &&
2393                 !target__has_task(&target)) {
2394                 if (!target.system_wide || target.cpu_list) {
2395                         fprintf(stderr, "The --per-thread option is only "
2396                                 "available when monitoring via -p -t -a "
2397                                 "options or only --per-thread.\n");
2398                         parse_options_usage(NULL, stat_options, "p", 1);
2399                         parse_options_usage(NULL, stat_options, "t", 1);
2400                         goto out;
2401                 }
2402         }
2403
2404         /*
2405          * no_aggr, cgroup are for system-wide only
2406          * --per-thread is aggregated per thread, we dont mix it with cpu mode
2407          */
2408         if (((stat_config.aggr_mode != AGGR_GLOBAL &&
2409               stat_config.aggr_mode != AGGR_THREAD) ||
2410              (nr_cgroups || stat_config.cgroup_list)) &&
2411             !target__has_cpu(&target)) {
2412                 fprintf(stderr, "both cgroup and no-aggregation "
2413                         "modes only available in system-wide mode\n");
2414
2415                 parse_options_usage(stat_usage, stat_options, "G", 1);
2416                 parse_options_usage(NULL, stat_options, "A", 1);
2417                 parse_options_usage(NULL, stat_options, "a", 1);
2418                 parse_options_usage(NULL, stat_options, "for-each-cgroup", 0);
2419                 goto out;
2420         }
2421
2422         if (stat_config.iostat_run) {
2423                 status = iostat_prepare(evsel_list, &stat_config);
2424                 if (status)
2425                         goto out;
2426                 if (iostat_mode == IOSTAT_LIST) {
2427                         iostat_list(evsel_list, &stat_config);
2428                         goto out;
2429                 } else if (verbose)
2430                         iostat_list(evsel_list, &stat_config);
2431                 if (iostat_mode == IOSTAT_RUN && !target__has_cpu(&target))
2432                         target.system_wide = true;
2433         }
2434
2435         if (add_default_attributes())
2436                 goto out;
2437
2438         if (stat_config.cgroup_list) {
2439                 if (nr_cgroups > 0) {
2440                         pr_err("--cgroup and --for-each-cgroup cannot be used together\n");
2441                         parse_options_usage(stat_usage, stat_options, "G", 1);
2442                         parse_options_usage(NULL, stat_options, "for-each-cgroup", 0);
2443                         goto out;
2444                 }
2445
2446                 if (evlist__expand_cgroup(evsel_list, stat_config.cgroup_list,
2447                                           &stat_config.metric_events, true) < 0) {
2448                         parse_options_usage(stat_usage, stat_options,
2449                                             "for-each-cgroup", 0);
2450                         goto out;
2451                 }
2452         }
2453
2454         if ((stat_config.aggr_mode == AGGR_THREAD) && (target.system_wide))
2455                 target.per_thread = true;
2456
2457         if (evlist__fix_hybrid_cpus(evsel_list, target.cpu_list)) {
2458                 pr_err("failed to use cpu list %s\n", target.cpu_list);
2459                 goto out;
2460         }
2461
2462         target.hybrid = perf_pmu__has_hybrid();
2463         if (evlist__create_maps(evsel_list, &target) < 0) {
2464                 if (target__has_task(&target)) {
2465                         pr_err("Problems finding threads of monitor\n");
2466                         parse_options_usage(stat_usage, stat_options, "p", 1);
2467                         parse_options_usage(NULL, stat_options, "t", 1);
2468                 } else if (target__has_cpu(&target)) {
2469                         perror("failed to parse CPUs map");
2470                         parse_options_usage(stat_usage, stat_options, "C", 1);
2471                         parse_options_usage(NULL, stat_options, "a", 1);
2472                 }
2473                 goto out;
2474         }
2475
2476         evlist__check_cpu_maps(evsel_list);
2477
2478         /*
2479          * Initialize thread_map with comm names,
2480          * so we could print it out on output.
2481          */
2482         if (stat_config.aggr_mode == AGGR_THREAD) {
2483                 thread_map__read_comms(evsel_list->core.threads);
2484                 if (target.system_wide) {
2485                         if (runtime_stat_new(&stat_config,
2486                                 perf_thread_map__nr(evsel_list->core.threads))) {
2487                                 goto out;
2488                         }
2489                 }
2490         }
2491
2492         if (stat_config.aggr_mode == AGGR_NODE)
2493                 cpu__setup_cpunode_map();
2494
2495         if (stat_config.times && interval)
2496                 interval_count = true;
2497         else if (stat_config.times && !interval) {
2498                 pr_err("interval-count option should be used together with "
2499                                 "interval-print.\n");
2500                 parse_options_usage(stat_usage, stat_options, "interval-count", 0);
2501                 parse_options_usage(stat_usage, stat_options, "I", 1);
2502                 goto out;
2503         }
2504
2505         if (timeout && timeout < 100) {
2506                 if (timeout < 10) {
2507                         pr_err("timeout must be >= 10ms.\n");
2508                         parse_options_usage(stat_usage, stat_options, "timeout", 0);
2509                         goto out;
2510                 } else
2511                         pr_warning("timeout < 100ms. "
2512                                    "The overhead percentage could be high in some cases. "
2513                                    "Please proceed with caution.\n");
2514         }
2515         if (timeout && interval) {
2516                 pr_err("timeout option is not supported with interval-print.\n");
2517                 parse_options_usage(stat_usage, stat_options, "timeout", 0);
2518                 parse_options_usage(stat_usage, stat_options, "I", 1);
2519                 goto out;
2520         }
2521
2522         if (evlist__alloc_stats(evsel_list, interval))
2523                 goto out;
2524
2525         if (perf_stat_init_aggr_mode())
2526                 goto out;
2527
2528         /*
2529          * Set sample_type to PERF_SAMPLE_IDENTIFIER, which should be harmless
2530          * while avoiding that older tools show confusing messages.
2531          *
2532          * However for pipe sessions we need to keep it zero,
2533          * because script's perf_evsel__check_attr is triggered
2534          * by attr->sample_type != 0, and we can't run it on
2535          * stat sessions.
2536          */
2537         stat_config.identifier = !(STAT_RECORD && perf_stat.data.is_pipe);
2538
2539         /*
2540          * We dont want to block the signals - that would cause
2541          * child tasks to inherit that and Ctrl-C would not work.
2542          * What we want is for Ctrl-C to work in the exec()-ed
2543          * task, but being ignored by perf stat itself:
2544          */
2545         atexit(sig_atexit);
2546         if (!forever)
2547                 signal(SIGINT,  skip_signal);
2548         signal(SIGCHLD, skip_signal);
2549         signal(SIGALRM, skip_signal);
2550         signal(SIGABRT, skip_signal);
2551
2552         if (evlist__initialize_ctlfd(evsel_list, stat_config.ctl_fd, stat_config.ctl_fd_ack))
2553                 goto out;
2554
2555         status = 0;
2556         for (run_idx = 0; forever || run_idx < stat_config.run_count; run_idx++) {
2557                 if (stat_config.run_count != 1 && verbose > 0)
2558                         fprintf(output, "[ perf stat: executing run #%d ... ]\n",
2559                                 run_idx + 1);
2560
2561                 if (run_idx != 0)
2562                         evlist__reset_prev_raw_counts(evsel_list);
2563
2564                 status = run_perf_stat(argc, argv, run_idx);
2565                 if (forever && status != -1 && !interval) {
2566                         print_counters(NULL, argc, argv);
2567                         perf_stat__reset_stats();
2568                 }
2569         }
2570
2571         if (!forever && status != -1 && (!interval || stat_config.summary))
2572                 print_counters(NULL, argc, argv);
2573
2574         evlist__finalize_ctlfd(evsel_list);
2575
2576         if (STAT_RECORD) {
2577                 /*
2578                  * We synthesize the kernel mmap record just so that older tools
2579                  * don't emit warnings about not being able to resolve symbols
2580                  * due to /proc/sys/kernel/kptr_restrict settings and instead provide
2581                  * a saner message about no samples being in the perf.data file.
2582                  *
2583                  * This also serves to suppress a warning about f_header.data.size == 0
2584                  * in header.c at the moment 'perf stat record' gets introduced, which
2585                  * is not really needed once we start adding the stat specific PERF_RECORD_
2586                  * records, but the need to suppress the kptr_restrict messages in older
2587                  * tools remain  -acme
2588                  */
2589                 int fd = perf_data__fd(&perf_stat.data);
2590
2591                 err = perf_event__synthesize_kernel_mmap((void *)&perf_stat,
2592                                                          process_synthesized_event,
2593                                                          &perf_stat.session->machines.host);
2594                 if (err) {
2595                         pr_warning("Couldn't synthesize the kernel mmap record, harmless, "
2596                                    "older tools may produce warnings about this file\n.");
2597                 }
2598
2599                 if (!interval) {
2600                         if (WRITE_STAT_ROUND_EVENT(walltime_nsecs_stats.max, FINAL))
2601                                 pr_err("failed to write stat round event\n");
2602                 }
2603
2604                 if (!perf_stat.data.is_pipe) {
2605                         perf_stat.session->header.data_size += perf_stat.bytes_written;
2606                         perf_session__write_header(perf_stat.session, evsel_list, fd, true);
2607                 }
2608
2609                 evlist__close(evsel_list);
2610                 perf_session__delete(perf_stat.session);
2611         }
2612
2613         perf_stat__exit_aggr_mode();
2614         evlist__free_stats(evsel_list);
2615 out:
2616         if (stat_config.iostat_run)
2617                 iostat_release(evsel_list);
2618
2619         zfree(&stat_config.walltime_run);
2620
2621         if (smi_cost && smi_reset)
2622                 sysfs__write_int(FREEZE_ON_SMI_PATH, 0);
2623
2624         evlist__delete(evsel_list);
2625
2626         metricgroup__rblist_exit(&stat_config.metric_events);
2627         runtime_stat_delete(&stat_config);
2628         evlist__close_control(stat_config.ctl_fd, stat_config.ctl_fd_ack, &stat_config.ctl_fd_close);
2629
2630         return status;
2631 }