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         .ru_stats               = &ru_stats,
 220         .big_num                = true,
 221         .ctl_fd                 = -1,
 222         .ctl_fd_ack             = -1,
 223         .iostat_run             = false,
 224 };
 225
 226 static bool cpus_map_matched(struct evsel *a, struct evsel *b)
 227 {
 228         if (!a->core.cpus && !b->core.cpus)
 229                 return true;
 230
 231         if (!a->core.cpus || !b->core.cpus)
 232                 return false;
 233
 234         if (perf_cpu_map__nr(a->core.cpus) != perf_cpu_map__nr(b->core.cpus))
 235                 return false;
 236
 237         for (int i = 0; i < perf_cpu_map__nr(a->core.cpus); i++) {
 238                 if (perf_cpu_map__cpu(a->core.cpus, i).cpu !=
 239                     perf_cpu_map__cpu(b->core.cpus, i).cpu)
 240                         return false;
 241         }
 242
 243         return true;
 244 }
 245
 246 static void evlist__check_cpu_maps(struct evlist *evlist)
 247 {
 248         struct evsel *evsel, *pos, *leader;
 249         char buf[1024];
 250
 251         if (evlist__has_hybrid(evlist))
 252                 evlist__warn_hybrid_group(evlist);
 253
 254         evlist__for_each_entry(evlist, evsel) {
 255                 leader = evsel__leader(evsel);
 256
 257                 /* Check that leader matches cpus with each member. */
 258                 if (leader == evsel)
 259                         continue;
 260                 if (cpus_map_matched(leader, evsel))
 261                         continue;
 262
 263                 /* If there's mismatch disable the group and warn user. */
 264                 WARN_ONCE(1, "WARNING: grouped events cpus do not match, disabling group:\n");
 265                 evsel__group_desc(leader, buf, sizeof(buf));
 266                 pr_warning("  %s\n", buf);
 267
 268                 if (verbose) {
 269                         cpu_map__snprint(leader->core.cpus, buf, sizeof(buf));
 270                         pr_warning("     %s: %s\n", leader->name, buf);
 271                         cpu_map__snprint(evsel->core.cpus, buf, sizeof(buf));
 272                         pr_warning("     %s: %s\n", evsel->name, buf);
 273                 }
 274
 275                 for_each_group_evsel(pos, leader)
 276                         evsel__remove_from_group(pos, leader);
 277         }
 278 }
 279
 280 static inline void diff_timespec(struct timespec *r, struct timespec *a,
 281                                  struct timespec *b)
 282 {
 283         r->tv_sec = a->tv_sec - b->tv_sec;
 284         if (a->tv_nsec < b->tv_nsec) {
 285                 r->tv_nsec = a->tv_nsec + NSEC_PER_SEC - b->tv_nsec;
 286                 r->tv_sec--;
 287         } else {
 288                 r->tv_nsec = a->tv_nsec - b->tv_nsec ;
 289         }
 290 }
 291
 292 static void perf_stat__reset_stats(void)
 293 {
 294         int i;
 295
 296         evlist__reset_stats(evsel_list);
 297         perf_stat__reset_shadow_stats();
 298
 299         for (i = 0; i < stat_config.stats_num; i++)
 300                 perf_stat__reset_shadow_per_stat(&stat_config.stats[i]);
 301 }
 302
 303 static int process_synthesized_event(struct perf_tool *tool __maybe_unused,
 304                                      union perf_event *event,
 305                                      struct perf_sample *sample __maybe_unused,
 306                                      struct machine *machine __maybe_unused)
 307 {
 308         if (perf_data__write(&perf_stat.data, event, event->header.size) < 0) {
 309                 pr_err("failed to write perf data, error: %m\n");
 310                 return -1;
 311         }
 312
 313         perf_stat.bytes_written += event->header.size;
 314         return 0;
 315 }
 316
 317 static int write_stat_round_event(u64 tm, u64 type)
 318 {
 319         return perf_event__synthesize_stat_round(NULL, tm, type,
 320                                                  process_synthesized_event,
 321                                                  NULL);
 322 }
 323
 324 #define WRITE_STAT_ROUND_EVENT(time, interval) \
 325         write_stat_round_event(time, PERF_STAT_ROUND_TYPE__ ## interval)
 326
 327 #define SID(e, x, y) xyarray__entry(e->core.sample_id, x, y)
 328
 329 static int evsel__write_stat_event(struct evsel *counter, int cpu_map_idx, u32 thread,
 330                                    struct perf_counts_values *count)
 331 {
 332         struct perf_sample_id *sid = SID(counter, cpu_map_idx, thread);
 333         struct perf_cpu cpu = perf_cpu_map__cpu(evsel__cpus(counter), cpu_map_idx);
 334
 335         return perf_event__synthesize_stat(NULL, cpu, thread, sid->id, count,
 336                                            process_synthesized_event, NULL);
 337 }
 338
 339 static int read_single_counter(struct evsel *counter, int cpu_map_idx,
 340                                int thread, struct timespec *rs)
 341 {
 342         switch(counter->tool_event) {
 343                 case PERF_TOOL_DURATION_TIME: {
 344                         u64 val = rs->tv_nsec + rs->tv_sec*1000000000ULL;
 345                         struct perf_counts_values *count =
 346                                 perf_counts(counter->counts, cpu_map_idx, thread);
 347                         count->ena = count->run = val;
 348                         count->val = val;
 349                         return 0;
 350                 }
 351                 case PERF_TOOL_USER_TIME:
 352                 case PERF_TOOL_SYSTEM_TIME: {
 353                         u64 val;
 354                         struct perf_counts_values *count =
 355                                 perf_counts(counter->counts, cpu_map_idx, thread);
 356                         if (counter->tool_event == PERF_TOOL_USER_TIME)
 357                                 val = ru_stats.ru_utime_usec_stat.mean;
 358                         else
 359                                 val = ru_stats.ru_stime_usec_stat.mean;
 360                         count->ena = count->run = val;
 361                         count->val = val;
 362                         return 0;
 363                 }
 364                 default:
 365                 case PERF_TOOL_NONE:
 366                         return evsel__read_counter(counter, cpu_map_idx, thread);
 367                 case PERF_TOOL_MAX:
 368                         /* This should never be reached */
 369                         return 0;
 370         }
 371 }
 372
 373 /*
 374  * Read out the results of a single counter:
 375  * do not aggregate counts across CPUs in system-wide mode
 376  */
 377 static int read_counter_cpu(struct evsel *counter, struct timespec *rs, int cpu_map_idx)
 378 {
 379         int nthreads = perf_thread_map__nr(evsel_list->core.threads);
 380         int thread;
 381
 382         if (!counter->supported)
 383                 return -ENOENT;
 384
 385         for (thread = 0; thread < nthreads; thread++) {
 386                 struct perf_counts_values *count;
 387
 388                 count = perf_counts(counter->counts, cpu_map_idx, thread);
 389
 390                 /*
 391                  * The leader's group read loads data into its group members
 392                  * (via evsel__read_counter()) and sets their count->loaded.
 393                  */
 394                 if (!perf_counts__is_loaded(counter->counts, cpu_map_idx, thread) &&
 395                     read_single_counter(counter, cpu_map_idx, thread, rs)) {
 396                         counter->counts->scaled = -1;
 397                         perf_counts(counter->counts, cpu_map_idx, thread)->ena = 0;
 398                         perf_counts(counter->counts, cpu_map_idx, thread)->run = 0;
 399                         return -1;
 400                 }
 401
 402                 perf_counts__set_loaded(counter->counts, cpu_map_idx, thread, false);
 403
 404                 if (STAT_RECORD) {
 405                         if (evsel__write_stat_event(counter, cpu_map_idx, thread, count)) {
 406                                 pr_err("failed to write stat event\n");
 407                                 return -1;
 408                         }
 409                 }
 410
 411                 if (verbose > 1) {
 412                         fprintf(stat_config.output,
 413                                 "%s: %d: %" PRIu64 " %" PRIu64 " %" PRIu64 "\n",
 414                                         evsel__name(counter),
 415                                         perf_cpu_map__cpu(evsel__cpus(counter),
 416                                                           cpu_map_idx).cpu,
 417                                         count->val, count->ena, count->run);
 418                 }
 419         }
 420
 421         return 0;
 422 }
 423
 424 static int read_affinity_counters(struct timespec *rs)
 425 {
 426         struct evlist_cpu_iterator evlist_cpu_itr;
 427         struct affinity saved_affinity, *affinity;
 428
 429         if (all_counters_use_bpf)
 430                 return 0;
 431
 432         if (!target__has_cpu(&target) || target__has_per_thread(&target))
 433                 affinity = NULL;
 434         else if (affinity__setup(&saved_affinity) < 0)
 435                 return -1;
 436         else
 437                 affinity = &saved_affinity;
 438
 439         evlist__for_each_cpu(evlist_cpu_itr, evsel_list, affinity) {
 440                 struct evsel *counter = evlist_cpu_itr.evsel;
 441
 442                 if (evsel__is_bpf(counter))
 443                         continue;
 444
 445                 if (!counter->err) {
 446                         counter->err = read_counter_cpu(counter, rs,
 447                                                         evlist_cpu_itr.cpu_map_idx);
 448                 }
 449         }
 450         if (affinity)
 451                 affinity__cleanup(&saved_affinity);
 452
 453         return 0;
 454 }
 455
 456 static int read_bpf_map_counters(void)
 457 {
 458         struct evsel *counter;
 459         int err;
 460
 461         evlist__for_each_entry(evsel_list, counter) {
 462                 if (!evsel__is_bpf(counter))
 463                         continue;
 464
 465                 err = bpf_counter__read(counter);
 466                 if (err)
 467                         return err;
 468         }
 469         return 0;
 470 }
 471
 472 static void read_counters(struct timespec *rs)
 473 {
 474         struct evsel *counter;
 475
 476         if (!stat_config.stop_read_counter) {
 477                 if (read_bpf_map_counters() ||
 478                     read_affinity_counters(rs))
 479                         return;
 480         }
 481
 482         evlist__for_each_entry(evsel_list, counter) {
 483                 if (counter->err)
 484                         pr_debug("failed to read counter %s\n", counter->name);
 485                 if (counter->err == 0 && perf_stat_process_counter(&stat_config, counter))
 486                         pr_warning("failed to process counter %s\n", counter->name);
 487                 counter->err = 0;
 488         }
 489 }
 490
 491 static int runtime_stat_new(struct perf_stat_config *config, int nthreads)
 492 {
 493         int i;
 494
 495         config->stats = calloc(nthreads, sizeof(struct runtime_stat));
 496         if (!config->stats)
 497                 return -1;
 498
 499         config->stats_num = nthreads;
 500
 501         for (i = 0; i < nthreads; i++)
 502                 runtime_stat__init(&config->stats[i]);
 503
 504         return 0;
 505 }
 506
 507 static void runtime_stat_delete(struct perf_stat_config *config)
 508 {
 509         int i;
 510
 511         if (!config->stats)
 512                 return;
 513
 514         for (i = 0; i < config->stats_num; i++)
 515                 runtime_stat__exit(&config->stats[i]);
 516
 517         zfree(&config->stats);
 518 }
 519
 520 static void runtime_stat_reset(struct perf_stat_config *config)
 521 {
 522         int i;
 523
 524         if (!config->stats)
 525                 return;
 526
 527         for (i = 0; i < config->stats_num; i++)
 528                 perf_stat__reset_shadow_per_stat(&config->stats[i]);
 529 }
 530
 531 static void process_interval(void)
 532 {
 533         struct timespec ts, rs;
 534
 535         clock_gettime(CLOCK_MONOTONIC, &ts);
 536         diff_timespec(&rs, &ts, &ref_time);
 537
 538         perf_stat__reset_shadow_per_stat(&rt_stat);
 539         runtime_stat_reset(&stat_config);
 540         read_counters(&rs);
 541
 542         if (STAT_RECORD) {
 543                 if (WRITE_STAT_ROUND_EVENT(rs.tv_sec * NSEC_PER_SEC + rs.tv_nsec, INTERVAL))
 544                         pr_err("failed to write stat round event\n");
 545         }
 546
 547         init_stats(&walltime_nsecs_stats);
 548         update_stats(&walltime_nsecs_stats, stat_config.interval * 1000000ULL);
 549         print_counters(&rs, 0, NULL);
 550 }
 551
 552 static bool handle_interval(unsigned int interval, int *times)
 553 {
 554         if (interval) {
 555                 process_interval();
 556                 if (interval_count && !(--(*times)))
 557                         return true;
 558         }
 559         return false;
 560 }
 561
 562 static int enable_counters(void)
 563 {
 564         struct evsel *evsel;
 565         int err;
 566
 567         evlist__for_each_entry(evsel_list, evsel) {
 568                 if (!evsel__is_bpf(evsel))
 569                         continue;
 570
 571                 err = bpf_counter__enable(evsel);
 572                 if (err)
 573                         return err;
 574         }
 575
 576         if (stat_config.initial_delay < 0) {
 577                 pr_info(EVLIST_DISABLED_MSG);
 578                 return 0;
 579         }
 580
 581         if (stat_config.initial_delay > 0) {
 582                 pr_info(EVLIST_DISABLED_MSG);
 583                 usleep(stat_config.initial_delay * USEC_PER_MSEC);
 584         }
 585
 586         /*
 587          * We need to enable counters only if:
 588          * - we don't have tracee (attaching to task or cpu)
 589          * - we have initial delay configured
 590          */
 591         if (!target__none(&target) || stat_config.initial_delay) {
 592                 if (!all_counters_use_bpf)
 593                         evlist__enable(evsel_list);
 594                 if (stat_config.initial_delay > 0)
 595                         pr_info(EVLIST_ENABLED_MSG);
 596         }
 597         return 0;
 598 }
 599
 600 static void disable_counters(void)
 601 {
 602         struct evsel *counter;
 603
 604         /*
 605          * If we don't have tracee (attaching to task or cpu), counters may
 606          * still be running. To get accurate group ratios, we must stop groups
 607          * from counting before reading their constituent counters.
 608          */
 609         if (!target__none(&target)) {
 610                 evlist__for_each_entry(evsel_list, counter)
 611                         bpf_counter__disable(counter);
 612                 if (!all_counters_use_bpf)
 613                         evlist__disable(evsel_list);
 614         }
 615 }
 616
 617 static volatile int workload_exec_errno;
 618
 619 /*
 620  * evlist__prepare_workload will send a SIGUSR1
 621  * if the fork fails, since we asked by setting its
 622  * want_signal to true.
 623  */
 624 static void workload_exec_failed_signal(int signo __maybe_unused, siginfo_t *info,
 625                                         void *ucontext __maybe_unused)
 626 {
 627         workload_exec_errno = info->si_value.sival_int;
 628 }
 629
 630 static bool evsel__should_store_id(struct evsel *counter)
 631 {
 632         return STAT_RECORD || counter->core.attr.read_format & PERF_FORMAT_ID;
 633 }
 634
 635 static bool is_target_alive(struct target *_target,
 636                             struct perf_thread_map *threads)
 637 {
 638         struct stat st;
 639         int i;
 640
 641         if (!target__has_task(_target))
 642                 return true;
 643
 644         for (i = 0; i < threads->nr; i++) {
 645                 char path[PATH_MAX];
 646
 647                 scnprintf(path, PATH_MAX, "%s/%d", procfs__mountpoint(),
 648                           threads->map[i].pid);
 649
 650                 if (!stat(path, &st))
 651                         return true;
 652         }
 653
 654         return false;
 655 }
 656
 657 static void process_evlist(struct evlist *evlist, unsigned int interval)
 658 {
 659         enum evlist_ctl_cmd cmd = EVLIST_CTL_CMD_UNSUPPORTED;
 660
 661         if (evlist__ctlfd_process(evlist, &cmd) > 0) {
 662                 switch (cmd) {
 663                 case EVLIST_CTL_CMD_ENABLE:
 664                         if (interval)
 665                                 process_interval();
 666                         break;
 667                 case EVLIST_CTL_CMD_DISABLE:
 668                         if (interval)
 669                                 process_interval();
 670                         break;
 671                 case EVLIST_CTL_CMD_SNAPSHOT:
 672                 case EVLIST_CTL_CMD_ACK:
 673                 case EVLIST_CTL_CMD_UNSUPPORTED:
 674                 case EVLIST_CTL_CMD_EVLIST:
 675                 case EVLIST_CTL_CMD_STOP:
 676                 case EVLIST_CTL_CMD_PING:
 677                 default:
 678                         break;
 679                 }
 680         }
 681 }
 682
 683 static void compute_tts(struct timespec *time_start, struct timespec *time_stop,
 684                         int *time_to_sleep)
 685 {
 686         int tts = *time_to_sleep;
 687         struct timespec time_diff;
 688
 689         diff_timespec(&time_diff, time_stop, time_start);
 690
 691         tts -= time_diff.tv_sec * MSEC_PER_SEC +
 692                time_diff.tv_nsec / NSEC_PER_MSEC;
 693
 694         if (tts < 0)
 695                 tts = 0;
 696
 697         *time_to_sleep = tts;
 698 }
 699
 700 static int dispatch_events(bool forks, int timeout, int interval, int *times)
 701 {
 702         int child_exited = 0, status = 0;
 703         int time_to_sleep, sleep_time;
 704         struct timespec time_start, time_stop;
 705
 706         if (interval)
 707                 sleep_time = interval;
 708         else if (timeout)
 709                 sleep_time = timeout;
 710         else
 711                 sleep_time = 1000;
 712
 713         time_to_sleep = sleep_time;
 714
 715         while (!done) {
 716                 if (forks)
 717                         child_exited = waitpid(child_pid, &status, WNOHANG);
 718                 else
 719                         child_exited = !is_target_alive(&target, evsel_list->core.threads) ? 1 : 0;
 720
 721                 if (child_exited)
 722                         break;
 723
 724                 clock_gettime(CLOCK_MONOTONIC, &time_start);
 725                 if (!(evlist__poll(evsel_list, time_to_sleep) > 0)) { /* poll timeout or EINTR */
 726                         if (timeout || handle_interval(interval, times))
 727                                 break;
 728                         time_to_sleep = sleep_time;
 729                 } else { /* fd revent */
 730                         process_evlist(evsel_list, interval);
 731                         clock_gettime(CLOCK_MONOTONIC, &time_stop);
 732                         compute_tts(&time_start, &time_stop, &time_to_sleep);
 733                 }
 734         }
 735
 736         return status;
 737 }
 738
 739 enum counter_recovery {
 740         COUNTER_SKIP,
 741         COUNTER_RETRY,
 742         COUNTER_FATAL,
 743 };
 744
 745 static enum counter_recovery stat_handle_error(struct evsel *counter)
 746 {
 747         char msg[BUFSIZ];
 748         /*
 749          * PPC returns ENXIO for HW counters until 2.6.37
 750          * (behavior changed with commit b0a873e).
 751          */
 752         if (errno == EINVAL || errno == ENOSYS ||
 753             errno == ENOENT || errno == EOPNOTSUPP ||
 754             errno == ENXIO) {
 755                 if (verbose > 0)
 756                         ui__warning("%s event is not supported by the kernel.\n",
 757                                     evsel__name(counter));
 758                 counter->supported = false;
 759                 /*
 760                  * errored is a sticky flag that means one of the counter's
 761                  * cpu event had a problem and needs to be reexamined.
 762                  */
 763                 counter->errored = true;
 764
 765                 if ((evsel__leader(counter) != counter) ||
 766                     !(counter->core.leader->nr_members > 1))
 767                         return COUNTER_SKIP;
 768         } else if (evsel__fallback(counter, errno, msg, sizeof(msg))) {
 769                 if (verbose > 0)
 770                         ui__warning("%s\n", msg);
 771                 return COUNTER_RETRY;
 772         } else if (target__has_per_thread(&target) &&
 773                    evsel_list->core.threads &&
 774                    evsel_list->core.threads->err_thread != -1) {
 775                 /*
 776                  * For global --per-thread case, skip current
 777                  * error thread.
 778                  */
 779                 if (!thread_map__remove(evsel_list->core.threads,
 780                                         evsel_list->core.threads->err_thread)) {
 781                         evsel_list->core.threads->err_thread = -1;
 782                         return COUNTER_RETRY;
 783                 }
 784         }
 785
 786         evsel__open_strerror(counter, &target, errno, msg, sizeof(msg));
 787         ui__error("%s\n", msg);
 788
 789         if (child_pid != -1)
 790                 kill(child_pid, SIGTERM);
 791         return COUNTER_FATAL;
 792 }
 793
 794 static int __run_perf_stat(int argc, const char **argv, int run_idx)
 795 {
 796         int interval = stat_config.interval;
 797         int times = stat_config.times;
 798         int timeout = stat_config.timeout;
 799         char msg[BUFSIZ];
 800         unsigned long long t0, t1;
 801         struct evsel *counter;
 802         size_t l;
 803         int status = 0;
 804         const bool forks = (argc > 0);
 805         bool is_pipe = STAT_RECORD ? perf_stat.data.is_pipe : false;
 806         struct evlist_cpu_iterator evlist_cpu_itr;
 807         struct affinity saved_affinity, *affinity = NULL;
 808         int err;
 809         bool second_pass = false;
 810
 811         if (forks) {
 812                 if (evlist__prepare_workload(evsel_list, &target, argv, is_pipe, workload_exec_failed_signal) < 0) {
 813                         perror("failed to prepare workload");
 814                         return -1;
 815                 }
 816                 child_pid = evsel_list->workload.pid;
 817         }
 818
 819         if (group)
 820                 evlist__set_leader(evsel_list);
 821
 822         if (!cpu_map__is_dummy(evsel_list->core.user_requested_cpus)) {
 823                 if (affinity__setup(&saved_affinity) < 0)
 824                         return -1;
 825                 affinity = &saved_affinity;
 826         }
 827
 828         evlist__for_each_entry(evsel_list, counter) {
 829                 if (bpf_counter__load(counter, &target))
 830                         return -1;
 831                 if (!evsel__is_bpf(counter))
 832                         all_counters_use_bpf = false;
 833         }
 834
 835         evlist__for_each_cpu(evlist_cpu_itr, evsel_list, affinity) {
 836                 counter = evlist_cpu_itr.evsel;
 837
 838                 /*
 839                  * bperf calls evsel__open_per_cpu() in bperf__load(), so
 840                  * no need to call it again here.
 841                  */
 842                 if (target.use_bpf)
 843                         break;
 844
 845                 if (counter->reset_group || counter->errored)
 846                         continue;
 847                 if (evsel__is_bpf(counter))
 848                         continue;
 849 try_again:
 850                 if (create_perf_stat_counter(counter, &stat_config, &target,
 851                                              evlist_cpu_itr.cpu_map_idx) < 0) {
 852
 853                         /*
 854                          * Weak group failed. We cannot just undo this here
 855                          * because earlier CPUs might be in group mode, and the kernel
 856                          * doesn't support mixing group and non group reads. Defer
 857                          * it to later.
 858                          * Don't close here because we're in the wrong affinity.
 859                          */
 860                         if ((errno == EINVAL || errno == EBADF) &&
 861                                 evsel__leader(counter) != counter &&
 862                                 counter->weak_group) {
 863                                 evlist__reset_weak_group(evsel_list, counter, false);
 864                                 assert(counter->reset_group);
 865                                 second_pass = true;
 866                                 continue;
 867                         }
 868
 869                         switch (stat_handle_error(counter)) {
 870                         case COUNTER_FATAL:
 871                                 return -1;
 872                         case COUNTER_RETRY:
 873                                 goto try_again;
 874                         case COUNTER_SKIP:
 875                                 continue;
 876                         default:
 877                                 break;
 878                         }
 879
 880                 }
 881                 counter->supported = true;
 882         }
 883
 884         if (second_pass) {
 885                 /*
 886                  * Now redo all the weak group after closing them,
 887                  * and also close errored counters.
 888                  */
 889
 890                 /* First close errored or weak retry */
 891                 evlist__for_each_cpu(evlist_cpu_itr, evsel_list, affinity) {
 892                         counter = evlist_cpu_itr.evsel;
 893
 894                         if (!counter->reset_group && !counter->errored)
 895                                 continue;
 896
 897                         perf_evsel__close_cpu(&counter->core, evlist_cpu_itr.cpu_map_idx);
 898                 }
 899                 /* Now reopen weak */
 900                 evlist__for_each_cpu(evlist_cpu_itr, evsel_list, affinity) {
 901                         counter = evlist_cpu_itr.evsel;
 902
 903                         if (!counter->reset_group && !counter->errored)
 904                                 continue;
 905                         if (!counter->reset_group)
 906                                 continue;
 907 try_again_reset:
 908                         pr_debug2("reopening weak %s\n", evsel__name(counter));
 909                         if (create_perf_stat_counter(counter, &stat_config, &target,
 910                                                      evlist_cpu_itr.cpu_map_idx) < 0) {
 911
 912                                 switch (stat_handle_error(counter)) {
 913                                 case COUNTER_FATAL:
 914                                         return -1;
 915                                 case COUNTER_RETRY:
 916                                         goto try_again_reset;
 917                                 case COUNTER_SKIP:
 918                                         continue;
 919                                 default:
 920                                         break;
 921                                 }
 922                         }
 923                         counter->supported = true;
 924                 }
 925         }
 926         affinity__cleanup(affinity);
 927
 928         evlist__for_each_entry(evsel_list, counter) {
 929                 if (!counter->supported) {
 930                         perf_evsel__free_fd(&counter->core);
 931                         continue;
 932                 }
 933
 934                 l = strlen(counter->unit);
 935                 if (l > stat_config.unit_width)
 936                         stat_config.unit_width = l;
 937
 938                 if (evsel__should_store_id(counter) &&
 939                     evsel__store_ids(counter, evsel_list))
 940                         return -1;
 941         }
 942
 943         if (evlist__apply_filters(evsel_list, &counter)) {
 944                 pr_err("failed to set filter \"%s\" on event %s with %d (%s)\n",
 945                         counter->filter, evsel__name(counter), errno,
 946                         str_error_r(errno, msg, sizeof(msg)));
 947                 return -1;
 948         }
 949
 950         if (STAT_RECORD) {
 951                 int fd = perf_data__fd(&perf_stat.data);
 952
 953                 if (is_pipe) {
 954                         err = perf_header__write_pipe(perf_data__fd(&perf_stat.data));
 955                 } else {
 956                         err = perf_session__write_header(perf_stat.session, evsel_list,
 957                                                          fd, false);
 958                 }
 959
 960                 if (err < 0)
 961                         return err;
 962
 963                 err = perf_event__synthesize_stat_events(&stat_config, NULL, evsel_list,
 964                                                          process_synthesized_event, is_pipe);
 965                 if (err < 0)
 966                         return err;
 967         }
 968
 969         /*
 970          * Enable counters and exec the command:
 971          */
 972         if (forks) {
 973                 err = enable_counters();
 974                 if (err)
 975                         return -1;
 976                 evlist__start_workload(evsel_list);
 977
 978                 t0 = rdclock();
 979                 clock_gettime(CLOCK_MONOTONIC, &ref_time);
 980
 981                 if (interval || timeout || evlist__ctlfd_initialized(evsel_list))
 982                         status = dispatch_events(forks, timeout, interval, &times);
 983                 if (child_pid != -1) {
 984                         if (timeout)
 985                                 kill(child_pid, SIGTERM);
 986                         wait4(child_pid, &status, 0, &stat_config.ru_data);
 987                 }
 988
 989                 if (workload_exec_errno) {
 990                         const char *emsg = str_error_r(workload_exec_errno, msg, sizeof(msg));
 991                         pr_err("Workload failed: %s\n", emsg);
 992                         return -1;
 993                 }
 994
 995                 if (WIFSIGNALED(status))
 996                         psignal(WTERMSIG(status), argv[0]);
 997         } else {
 998                 err = enable_counters();
 999                 if (err)
1000                         return -1;
1001
1002                 t0 = rdclock();
1003                 clock_gettime(CLOCK_MONOTONIC, &ref_time);
1004
1005                 status = dispatch_events(forks, timeout, interval, &times);
1006         }
1007
1008         disable_counters();
1009
1010         t1 = rdclock();
1011
1012         if (stat_config.walltime_run_table)
1013                 stat_config.walltime_run[run_idx] = t1 - t0;
1014
1015         if (interval && stat_config.summary) {
1016                 stat_config.interval = 0;
1017                 stat_config.stop_read_counter = true;
1018                 init_stats(&walltime_nsecs_stats);
1019                 update_stats(&walltime_nsecs_stats, t1 - t0);
1020
1021                 if (stat_config.aggr_mode == AGGR_GLOBAL)
1022                         evlist__save_aggr_prev_raw_counts(evsel_list);
1023
1024                 evlist__copy_prev_raw_counts(evsel_list);
1025                 evlist__reset_prev_raw_counts(evsel_list);
1026                 runtime_stat_reset(&stat_config);
1027                 perf_stat__reset_shadow_per_stat(&rt_stat);
1028         } else {
1029                 update_stats(&walltime_nsecs_stats, t1 - t0);
1030                 update_rusage_stats(&ru_stats, &stat_config.ru_data);
1031         }
1032
1033         /*
1034          * Closing a group leader splits the group, and as we only disable
1035          * group leaders, results in remaining events becoming enabled. To
1036          * avoid arbitrary skew, we must read all counters before closing any
1037          * group leaders.
1038          */
1039         read_counters(&(struct timespec) { .tv_nsec = t1-t0 });
1040
1041         /*
1042          * We need to keep evsel_list alive, because it's processed
1043          * later the evsel_list will be closed after.
1044          */
1045         if (!STAT_RECORD)
1046                 evlist__close(evsel_list);
1047
1048         return WEXITSTATUS(status);
1049 }
1050
1051 static int run_perf_stat(int argc, const char **argv, int run_idx)
1052 {
1053         int ret;
1054
1055         if (pre_cmd) {
1056                 ret = system(pre_cmd);
1057                 if (ret)
1058                         return ret;
1059         }
1060
1061         if (sync_run)
1062                 sync();
1063
1064         ret = __run_perf_stat(argc, argv, run_idx);
1065         if (ret)
1066                 return ret;
1067
1068         if (post_cmd) {
1069                 ret = system(post_cmd);
1070                 if (ret)
1071                         return ret;
1072         }
1073
1074         return ret;
1075 }
1076
1077 static void print_counters(struct timespec *ts, int argc, const char **argv)
1078 {
1079         /* Do not print anything if we record to the pipe. */
1080         if (STAT_RECORD && perf_stat.data.is_pipe)
1081                 return;
1082         if (stat_config.quiet)
1083                 return;
1084
1085         evlist__print_counters(evsel_list, &stat_config, &target, ts, argc, argv);
1086 }
1087
1088 static volatile int signr = -1;
1089
1090 static void skip_signal(int signo)
1091 {
1092         if ((child_pid == -1) || stat_config.interval)
1093                 done = 1;
1094
1095         signr = signo;
1096         /*
1097          * render child_pid harmless
1098          * won't send SIGTERM to a random
1099          * process in case of race condition
1100          * and fast PID recycling
1101          */
1102         child_pid = -1;
1103 }
1104
1105 static void sig_atexit(void)
1106 {
1107         sigset_t set, oset;
1108
1109         /*
1110          * avoid race condition with SIGCHLD handler
1111          * in skip_signal() which is modifying child_pid
1112          * goal is to avoid send SIGTERM to a random
1113          * process
1114          */
1115         sigemptyset(&set);
1116         sigaddset(&set, SIGCHLD);
1117         sigprocmask(SIG_BLOCK, &set, &oset);
1118
1119         if (child_pid != -1)
1120                 kill(child_pid, SIGTERM);
1121
1122         sigprocmask(SIG_SETMASK, &oset, NULL);
1123
1124         if (signr == -1)
1125                 return;
1126
1127         signal(signr, SIG_DFL);
1128         kill(getpid(), signr);
1129 }
1130
1131 void perf_stat__set_big_num(int set)
1132 {
1133         stat_config.big_num = (set != 0);
1134 }
1135
1136 void perf_stat__set_no_csv_summary(int set)
1137 {
1138         stat_config.no_csv_summary = (set != 0);
1139 }
1140
1141 static int stat__set_big_num(const struct option *opt __maybe_unused,
1142                              const char *s __maybe_unused, int unset)
1143 {
1144         big_num_opt = unset ? 0 : 1;
1145         perf_stat__set_big_num(!unset);
1146         return 0;
1147 }
1148
1149 static int enable_metric_only(const struct option *opt __maybe_unused,
1150                               const char *s __maybe_unused, int unset)
1151 {
1152         force_metric_only = true;
1153         stat_config.metric_only = !unset;
1154         return 0;
1155 }
1156
1157 static int parse_metric_groups(const struct option *opt,
1158                                const char *str,
1159                                int unset __maybe_unused)
1160 {
1161         return metricgroup__parse_groups(opt, str,
1162                                          stat_config.metric_no_group,
1163                                          stat_config.metric_no_merge,
1164                                          &stat_config.metric_events);
1165 }
1166
1167 static int parse_control_option(const struct option *opt,
1168                                 const char *str,
1169                                 int unset __maybe_unused)
1170 {
1171         struct perf_stat_config *config = opt->value;
1172
1173         return evlist__parse_control(str, &config->ctl_fd, &config->ctl_fd_ack, &config->ctl_fd_close);
1174 }
1175
1176 static int parse_stat_cgroups(const struct option *opt,
1177                               const char *str, int unset)
1178 {
1179         if (stat_config.cgroup_list) {
1180                 pr_err("--cgroup and --for-each-cgroup cannot be used together\n");
1181                 return -1;
1182         }
1183
1184         return parse_cgroups(opt, str, unset);
1185 }
1186
1187 static int parse_hybrid_type(const struct option *opt,
1188                              const char *str,
1189                              int unset __maybe_unused)
1190 {
1191         struct evlist *evlist = *(struct evlist **)opt->value;
1192
1193         if (!list_empty(&evlist->core.entries)) {
1194                 fprintf(stderr, "Must define cputype before events/metrics\n");
1195                 return -1;
1196         }
1197
1198         evlist->hybrid_pmu_name = perf_pmu__hybrid_type_to_pmu(str);
1199         if (!evlist->hybrid_pmu_name) {
1200                 fprintf(stderr, "--cputype %s is not supported!\n", str);
1201                 return -1;
1202         }
1203
1204         return 0;
1205 }
1206
1207 static struct option stat_options[] = {
1208         OPT_BOOLEAN('T', "transaction", &transaction_run,
1209                     "hardware transaction statistics"),
1210         OPT_CALLBACK('e', "event", &evsel_list, "event",
1211                      "event selector. use 'perf list' to list available events",
1212                      parse_events_option),
1213         OPT_CALLBACK(0, "filter", &evsel_list, "filter",
1214                      "event filter", parse_filter),
1215         OPT_BOOLEAN('i', "no-inherit", &stat_config.no_inherit,
1216                     "child tasks do not inherit counters"),
1217         OPT_STRING('p', "pid", &target.pid, "pid",
1218                    "stat events on existing process id"),
1219         OPT_STRING('t', "tid", &target.tid, "tid",
1220                    "stat events on existing thread id"),
1221 #ifdef HAVE_BPF_SKEL
1222         OPT_STRING('b', "bpf-prog", &target.bpf_str, "bpf-prog-id",
1223                    "stat events on existing bpf program id"),
1224         OPT_BOOLEAN(0, "bpf-counters", &target.use_bpf,
1225                     "use bpf program to count events"),
1226         OPT_STRING(0, "bpf-attr-map", &target.attr_map, "attr-map-path",
1227                    "path to perf_event_attr map"),
1228 #endif
1229         OPT_BOOLEAN('a', "all-cpus", &target.system_wide,
1230                     "system-wide collection from all CPUs"),
1231         OPT_BOOLEAN('g', "group", &group,
1232                     "put the counters into a counter group"),
1233         OPT_BOOLEAN(0, "scale", &stat_config.scale,
1234                     "Use --no-scale to disable counter scaling for multiplexing"),
1235         OPT_INCR('v', "verbose", &verbose,
1236                     "be more verbose (show counter open errors, etc)"),
1237         OPT_INTEGER('r', "repeat", &stat_config.run_count,
1238                     "repeat command and print average + stddev (max: 100, forever: 0)"),
1239         OPT_BOOLEAN(0, "table", &stat_config.walltime_run_table,
1240                     "display details about each run (only with -r option)"),
1241         OPT_BOOLEAN('n', "null", &stat_config.null_run,
1242                     "null run - dont start any counters"),
1243         OPT_INCR('d', "detailed", &detailed_run,
1244                     "detailed run - start a lot of events"),
1245         OPT_BOOLEAN('S', "sync", &sync_run,
1246                     "call sync() before starting a run"),
1247         OPT_CALLBACK_NOOPT('B', "big-num", NULL, NULL,
1248                            "print large numbers with thousands\' separators",
1249                            stat__set_big_num),
1250         OPT_STRING('C', "cpu", &target.cpu_list, "cpu",
1251                     "list of cpus to monitor in system-wide"),
1252         OPT_SET_UINT('A', "no-aggr", &stat_config.aggr_mode,
1253                     "disable CPU count aggregation", AGGR_NONE),
1254         OPT_BOOLEAN(0, "no-merge", &stat_config.no_merge, "Do not merge identical named events"),
1255         OPT_BOOLEAN(0, "hybrid-merge", &stat_config.hybrid_merge,
1256                     "Merge identical named hybrid events"),
1257         OPT_STRING('x', "field-separator", &stat_config.csv_sep, "separator",
1258                    "print counts with custom separator"),
1259         OPT_CALLBACK('G', "cgroup", &evsel_list, "name",
1260                      "monitor event in cgroup name only", parse_stat_cgroups),
1261         OPT_STRING(0, "for-each-cgroup", &stat_config.cgroup_list, "name",
1262                     "expand events for each cgroup"),
1263         OPT_STRING('o', "output", &output_name, "file", "output file name"),
1264         OPT_BOOLEAN(0, "append", &append_file, "append to the output file"),
1265         OPT_INTEGER(0, "log-fd", &output_fd,
1266                     "log output to fd, instead of stderr"),
1267         OPT_STRING(0, "pre", &pre_cmd, "command",
1268                         "command to run prior to the measured command"),
1269         OPT_STRING(0, "post", &post_cmd, "command",
1270                         "command to run after to the measured command"),
1271         OPT_UINTEGER('I', "interval-print", &stat_config.interval,
1272                     "print counts at regular interval in ms "
1273                     "(overhead is possible for values <= 100ms)"),
1274         OPT_INTEGER(0, "interval-count", &stat_config.times,
1275                     "print counts for fixed number of times"),
1276         OPT_BOOLEAN(0, "interval-clear", &stat_config.interval_clear,
1277                     "clear screen in between new interval"),
1278         OPT_UINTEGER(0, "timeout", &stat_config.timeout,
1279                     "stop workload and print counts after a timeout period in ms (>= 10ms)"),
1280         OPT_SET_UINT(0, "per-socket", &stat_config.aggr_mode,
1281                      "aggregate counts per processor socket", AGGR_SOCKET),
1282         OPT_SET_UINT(0, "per-die", &stat_config.aggr_mode,
1283                      "aggregate counts per processor die", AGGR_DIE),
1284         OPT_SET_UINT(0, "per-core", &stat_config.aggr_mode,
1285                      "aggregate counts per physical processor core", AGGR_CORE),
1286         OPT_SET_UINT(0, "per-thread", &stat_config.aggr_mode,
1287                      "aggregate counts per thread", AGGR_THREAD),
1288         OPT_SET_UINT(0, "per-node", &stat_config.aggr_mode,
1289                      "aggregate counts per numa node", AGGR_NODE),
1290         OPT_INTEGER('D', "delay", &stat_config.initial_delay,
1291                     "ms to wait before starting measurement after program start (-1: start with events disabled)"),
1292         OPT_CALLBACK_NOOPT(0, "metric-only", &stat_config.metric_only, NULL,
1293                         "Only print computed metrics. No raw values", enable_metric_only),
1294         OPT_BOOLEAN(0, "metric-no-group", &stat_config.metric_no_group,
1295                        "don't group metric events, impacts multiplexing"),
1296         OPT_BOOLEAN(0, "metric-no-merge", &stat_config.metric_no_merge,
1297                        "don't try to share events between metrics in a group"),
1298         OPT_BOOLEAN(0, "topdown", &topdown_run,
1299                         "measure top-down statistics"),
1300         OPT_UINTEGER(0, "td-level", &stat_config.topdown_level,
1301                         "Set the metrics level for the top-down statistics (0: max level)"),
1302         OPT_BOOLEAN(0, "smi-cost", &smi_cost,
1303                         "measure SMI cost"),
1304         OPT_CALLBACK('M', "metrics", &evsel_list, "metric/metric group list",
1305                      "monitor specified metrics or metric groups (separated by ,)",
1306                      parse_metric_groups),
1307         OPT_BOOLEAN_FLAG(0, "all-kernel", &stat_config.all_kernel,
1308                          "Configure all used events to run in kernel space.",
1309                          PARSE_OPT_EXCLUSIVE),
1310         OPT_BOOLEAN_FLAG(0, "all-user", &stat_config.all_user,
1311                          "Configure all used events to run in user space.",
1312                          PARSE_OPT_EXCLUSIVE),
1313         OPT_BOOLEAN(0, "percore-show-thread", &stat_config.percore_show_thread,
1314                     "Use with 'percore' event qualifier to show the event "
1315                     "counts of one hardware thread by sum up total hardware "
1316                     "threads of same physical core"),
1317         OPT_BOOLEAN(0, "summary", &stat_config.summary,
1318                        "print summary for interval mode"),
1319         OPT_BOOLEAN(0, "no-csv-summary", &stat_config.no_csv_summary,
1320                        "don't print 'summary' for CSV summary output"),
1321         OPT_BOOLEAN(0, "quiet", &stat_config.quiet,
1322                         "don't print output (useful with record)"),
1323         OPT_CALLBACK(0, "cputype", &evsel_list, "hybrid cpu type",
1324                      "Only enable events on applying cpu with this type "
1325                      "for hybrid platform (e.g. core or atom)",
1326                      parse_hybrid_type),
1327 #ifdef HAVE_LIBPFM
1328         OPT_CALLBACK(0, "pfm-events", &evsel_list, "event",
1329                 "libpfm4 event selector. use 'perf list' to list available events",
1330                 parse_libpfm_events_option),
1331 #endif
1332         OPT_CALLBACK(0, "control", &stat_config, "fd:ctl-fd[,ack-fd] or fifo:ctl-fifo[,ack-fifo]",
1333                      "Listen on ctl-fd descriptor for command to control measurement ('enable': enable events, 'disable': disable events).\n"
1334                      "\t\t\t  Optionally send control command completion ('ack\\n') to ack-fd descriptor.\n"
1335                      "\t\t\t  Alternatively, ctl-fifo / ack-fifo will be opened and used as ctl-fd / ack-fd.",
1336                       parse_control_option),
1337         OPT_CALLBACK_OPTARG(0, "iostat", &evsel_list, &stat_config, "default",
1338                             "measure I/O performance metrics provided by arch/platform",
1339                             iostat_parse),
1340         OPT_END()
1341 };
1342
1343 static const char *const aggr_mode__string[] = {
1344         [AGGR_CORE] = "core",
1345         [AGGR_DIE] = "die",
1346         [AGGR_GLOBAL] = "global",
1347         [AGGR_NODE] = "node",
1348         [AGGR_NONE] = "none",
1349         [AGGR_SOCKET] = "socket",
1350         [AGGR_THREAD] = "thread",
1351         [AGGR_UNSET] = "unset",
1352 };
1353
1354 static struct aggr_cpu_id perf_stat__get_socket(struct perf_stat_config *config __maybe_unused,
1355                                                 struct perf_cpu cpu)
1356 {
1357         return aggr_cpu_id__socket(cpu, /*data=*/NULL);
1358 }
1359
1360 static struct aggr_cpu_id perf_stat__get_die(struct perf_stat_config *config __maybe_unused,
1361                                              struct perf_cpu cpu)
1362 {
1363         return aggr_cpu_id__die(cpu, /*data=*/NULL);
1364 }
1365
1366 static struct aggr_cpu_id perf_stat__get_core(struct perf_stat_config *config __maybe_unused,
1367                                               struct perf_cpu cpu)
1368 {
1369         return aggr_cpu_id__core(cpu, /*data=*/NULL);
1370 }
1371
1372 static struct aggr_cpu_id perf_stat__get_node(struct perf_stat_config *config __maybe_unused,
1373                                               struct perf_cpu cpu)
1374 {
1375         return aggr_cpu_id__node(cpu, /*data=*/NULL);
1376 }
1377
1378 static struct aggr_cpu_id perf_stat__get_aggr(struct perf_stat_config *config,
1379                                               aggr_get_id_t get_id, struct perf_cpu cpu)
1380 {
1381         struct aggr_cpu_id id = aggr_cpu_id__empty();
1382
1383         if (aggr_cpu_id__is_empty(&config->cpus_aggr_map->map[cpu.cpu]))
1384                 config->cpus_aggr_map->map[cpu.cpu] = get_id(config, cpu);
1385
1386         id = config->cpus_aggr_map->map[cpu.cpu];
1387         return id;
1388 }
1389
1390 static struct aggr_cpu_id perf_stat__get_socket_cached(struct perf_stat_config *config,
1391                                                        struct perf_cpu cpu)
1392 {
1393         return perf_stat__get_aggr(config, perf_stat__get_socket, cpu);
1394 }
1395
1396 static struct aggr_cpu_id perf_stat__get_die_cached(struct perf_stat_config *config,
1397                                                     struct perf_cpu cpu)
1398 {
1399         return perf_stat__get_aggr(config, perf_stat__get_die, cpu);
1400 }
1401
1402 static struct aggr_cpu_id perf_stat__get_core_cached(struct perf_stat_config *config,
1403                                                      struct perf_cpu cpu)
1404 {
1405         return perf_stat__get_aggr(config, perf_stat__get_core, cpu);
1406 }
1407
1408 static struct aggr_cpu_id perf_stat__get_node_cached(struct perf_stat_config *config,
1409                                                      struct perf_cpu cpu)
1410 {
1411         return perf_stat__get_aggr(config, perf_stat__get_node, cpu);
1412 }
1413
1414 static bool term_percore_set(void)
1415 {
1416         struct evsel *counter;
1417
1418         evlist__for_each_entry(evsel_list, counter) {
1419                 if (counter->percore)
1420                         return true;
1421         }
1422
1423         return false;
1424 }
1425
1426 static aggr_cpu_id_get_t aggr_mode__get_aggr(enum aggr_mode aggr_mode)
1427 {
1428         switch (aggr_mode) {
1429         case AGGR_SOCKET:
1430                 return aggr_cpu_id__socket;
1431         case AGGR_DIE:
1432                 return aggr_cpu_id__die;
1433         case AGGR_CORE:
1434                 return aggr_cpu_id__core;
1435         case AGGR_NODE:
1436                 return aggr_cpu_id__node;
1437         case AGGR_NONE:
1438                 if (term_percore_set())
1439                         return aggr_cpu_id__core;
1440
1441                 return NULL;
1442         case AGGR_GLOBAL:
1443         case AGGR_THREAD:
1444         case AGGR_UNSET:
1445         default:
1446                 return NULL;
1447         }
1448 }
1449
1450 static aggr_get_id_t aggr_mode__get_id(enum aggr_mode aggr_mode)
1451 {
1452         switch (aggr_mode) {
1453         case AGGR_SOCKET:
1454                 return perf_stat__get_socket_cached;
1455         case AGGR_DIE:
1456                 return perf_stat__get_die_cached;
1457         case AGGR_CORE:
1458                 return perf_stat__get_core_cached;
1459         case AGGR_NODE:
1460                 return perf_stat__get_node_cached;
1461         case AGGR_NONE:
1462                 if (term_percore_set()) {
1463                         return perf_stat__get_core_cached;
1464                 }
1465                 return NULL;
1466         case AGGR_GLOBAL:
1467         case AGGR_THREAD:
1468         case AGGR_UNSET:
1469         default:
1470                 return NULL;
1471         }
1472 }
1473
1474 static int perf_stat_init_aggr_mode(void)
1475 {
1476         int nr;
1477         aggr_cpu_id_get_t get_id = aggr_mode__get_aggr(stat_config.aggr_mode);
1478
1479         if (get_id) {
1480                 stat_config.aggr_map = cpu_aggr_map__new(evsel_list->core.user_requested_cpus,
1481                                                          get_id, /*data=*/NULL);
1482                 if (!stat_config.aggr_map) {
1483                         pr_err("cannot build %s map", aggr_mode__string[stat_config.aggr_mode]);
1484                         return -1;
1485                 }
1486                 stat_config.aggr_get_id = aggr_mode__get_id(stat_config.aggr_mode);
1487         }
1488
1489         /*
1490          * The evsel_list->cpus is the base we operate on,
1491          * taking the highest cpu number to be the size of
1492          * the aggregation translate cpumap.
1493          */
1494         if (evsel_list->core.user_requested_cpus)
1495                 nr = perf_cpu_map__max(evsel_list->core.user_requested_cpus).cpu;
1496         else
1497                 nr = 0;
1498         stat_config.cpus_aggr_map = cpu_aggr_map__empty_new(nr + 1);
1499         return stat_config.cpus_aggr_map ? 0 : -ENOMEM;
1500 }
1501
1502 static void cpu_aggr_map__delete(struct cpu_aggr_map *map)
1503 {
1504         if (map) {
1505                 WARN_ONCE(refcount_read(&map->refcnt) != 0,
1506                           "cpu_aggr_map refcnt unbalanced\n");
1507                 free(map);
1508         }
1509 }
1510
1511 static void cpu_aggr_map__put(struct cpu_aggr_map *map)
1512 {
1513         if (map && refcount_dec_and_test(&map->refcnt))
1514                 cpu_aggr_map__delete(map);
1515 }
1516
1517 static void perf_stat__exit_aggr_mode(void)
1518 {
1519         cpu_aggr_map__put(stat_config.aggr_map);
1520         cpu_aggr_map__put(stat_config.cpus_aggr_map);
1521         stat_config.aggr_map = NULL;
1522         stat_config.cpus_aggr_map = NULL;
1523 }
1524
1525 static struct aggr_cpu_id perf_env__get_socket_aggr_by_cpu(struct perf_cpu cpu, void *data)
1526 {
1527         struct perf_env *env = data;
1528         struct aggr_cpu_id id = aggr_cpu_id__empty();
1529
1530         if (cpu.cpu != -1)
1531                 id.socket = env->cpu[cpu.cpu].socket_id;
1532
1533         return id;
1534 }
1535
1536 static struct aggr_cpu_id perf_env__get_die_aggr_by_cpu(struct perf_cpu cpu, void *data)
1537 {
1538         struct perf_env *env = data;
1539         struct aggr_cpu_id id = aggr_cpu_id__empty();
1540
1541         if (cpu.cpu != -1) {
1542                 /*
1543                  * die_id is relative to socket, so start
1544                  * with the socket ID and then add die to
1545                  * make a unique ID.
1546                  */
1547                 id.socket = env->cpu[cpu.cpu].socket_id;
1548                 id.die = env->cpu[cpu.cpu].die_id;
1549         }
1550
1551         return id;
1552 }
1553
1554 static struct aggr_cpu_id perf_env__get_core_aggr_by_cpu(struct perf_cpu cpu, void *data)
1555 {
1556         struct perf_env *env = data;
1557         struct aggr_cpu_id id = aggr_cpu_id__empty();
1558
1559         if (cpu.cpu != -1) {
1560                 /*
1561                  * core_id is relative to socket and die,
1562                  * we need a global id. So we set
1563                  * socket, die id and core id
1564                  */
1565                 id.socket = env->cpu[cpu.cpu].socket_id;
1566                 id.die = env->cpu[cpu.cpu].die_id;
1567                 id.core = env->cpu[cpu.cpu].core_id;
1568         }
1569
1570         return id;
1571 }
1572
1573 static struct aggr_cpu_id perf_env__get_node_aggr_by_cpu(struct perf_cpu cpu, void *data)
1574 {
1575         struct aggr_cpu_id id = aggr_cpu_id__empty();
1576
1577         id.node = perf_env__numa_node(data, cpu);
1578         return id;
1579 }
1580
1581 static struct aggr_cpu_id perf_stat__get_socket_file(struct perf_stat_config *config __maybe_unused,
1582                                                      struct perf_cpu cpu)
1583 {
1584         return perf_env__get_socket_aggr_by_cpu(cpu, &perf_stat.session->header.env);
1585 }
1586 static struct aggr_cpu_id perf_stat__get_die_file(struct perf_stat_config *config __maybe_unused,
1587                                                   struct perf_cpu cpu)
1588 {
1589         return perf_env__get_die_aggr_by_cpu(cpu, &perf_stat.session->header.env);
1590 }
1591
1592 static struct aggr_cpu_id perf_stat__get_core_file(struct perf_stat_config *config __maybe_unused,
1593                                                    struct perf_cpu cpu)
1594 {
1595         return perf_env__get_core_aggr_by_cpu(cpu, &perf_stat.session->header.env);
1596 }
1597
1598 static struct aggr_cpu_id perf_stat__get_node_file(struct perf_stat_config *config __maybe_unused,
1599                                                    struct perf_cpu cpu)
1600 {
1601         return perf_env__get_node_aggr_by_cpu(cpu, &perf_stat.session->header.env);
1602 }
1603
1604 static aggr_cpu_id_get_t aggr_mode__get_aggr_file(enum aggr_mode aggr_mode)
1605 {
1606         switch (aggr_mode) {
1607         case AGGR_SOCKET:
1608                 return perf_env__get_socket_aggr_by_cpu;
1609         case AGGR_DIE:
1610                 return perf_env__get_die_aggr_by_cpu;
1611         case AGGR_CORE:
1612                 return perf_env__get_core_aggr_by_cpu;
1613         case AGGR_NODE:
1614                 return perf_env__get_node_aggr_by_cpu;
1615         case AGGR_NONE:
1616         case AGGR_GLOBAL:
1617         case AGGR_THREAD:
1618         case AGGR_UNSET:
1619         default:
1620                 return NULL;
1621         }
1622 }
1623
1624 static aggr_get_id_t aggr_mode__get_id_file(enum aggr_mode aggr_mode)
1625 {
1626         switch (aggr_mode) {
1627         case AGGR_SOCKET:
1628                 return perf_stat__get_socket_file;
1629         case AGGR_DIE:
1630                 return perf_stat__get_die_file;
1631         case AGGR_CORE:
1632                 return perf_stat__get_core_file;
1633         case AGGR_NODE:
1634                 return perf_stat__get_node_file;
1635         case AGGR_NONE:
1636         case AGGR_GLOBAL:
1637         case AGGR_THREAD:
1638         case AGGR_UNSET:
1639         default:
1640                 return NULL;
1641         }
1642 }
1643
1644 static int perf_stat_init_aggr_mode_file(struct perf_stat *st)
1645 {
1646         struct perf_env *env = &st->session->header.env;
1647         aggr_cpu_id_get_t get_id = aggr_mode__get_aggr_file(stat_config.aggr_mode);
1648
1649         if (!get_id)
1650                 return 0;
1651
1652         stat_config.aggr_map = cpu_aggr_map__new(evsel_list->core.user_requested_cpus, get_id, env);
1653         if (!stat_config.aggr_map) {
1654                 pr_err("cannot build %s map", aggr_mode__string[stat_config.aggr_mode]);
1655                 return -1;
1656         }
1657         stat_config.aggr_get_id = aggr_mode__get_id_file(stat_config.aggr_mode);
1658         return 0;
1659 }
1660
1661 /*
1662  * Add default attributes, if there were no attributes specified or
1663  * if -d/--detailed, -d -d or -d -d -d is used:
1664  */
1665 static int add_default_attributes(void)
1666 {
1667         int err;
1668         struct perf_event_attr default_attrs0[] = {
1669
1670   { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_TASK_CLOCK              },
1671   { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_CONTEXT_SWITCHES        },
1672   { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_CPU_MIGRATIONS          },
1673   { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_PAGE_FAULTS             },
1674
1675   { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_CPU_CYCLES              },
1676 };
1677         struct perf_event_attr frontend_attrs[] = {
1678   { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_STALLED_CYCLES_FRONTEND },
1679 };
1680         struct perf_event_attr backend_attrs[] = {
1681   { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_STALLED_CYCLES_BACKEND  },
1682 };
1683         struct perf_event_attr default_attrs1[] = {
1684   { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_INSTRUCTIONS            },
1685   { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_BRANCH_INSTRUCTIONS     },
1686   { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_BRANCH_MISSES           },
1687
1688 };
1689         struct perf_event_attr default_sw_attrs[] = {
1690   { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_TASK_CLOCK              },
1691   { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_CONTEXT_SWITCHES        },
1692   { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_CPU_MIGRATIONS          },
1693   { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_PAGE_FAULTS             },
1694 };
1695
1696 /*
1697  * Detailed stats (-d), covering the L1 and last level data caches:
1698  */
1699         struct perf_event_attr detailed_attrs[] = {
1700
1701   { .type = PERF_TYPE_HW_CACHE,
1702     .config =
1703          PERF_COUNT_HW_CACHE_L1D                <<  0  |
1704         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
1705         (PERF_COUNT_HW_CACHE_RESULT_ACCESS      << 16)                          },
1706
1707   { .type = PERF_TYPE_HW_CACHE,
1708     .config =
1709          PERF_COUNT_HW_CACHE_L1D                <<  0  |
1710         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
1711         (PERF_COUNT_HW_CACHE_RESULT_MISS        << 16)                          },
1712
1713   { .type = PERF_TYPE_HW_CACHE,
1714     .config =
1715          PERF_COUNT_HW_CACHE_LL                 <<  0  |
1716         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
1717         (PERF_COUNT_HW_CACHE_RESULT_ACCESS      << 16)                          },
1718
1719   { .type = PERF_TYPE_HW_CACHE,
1720     .config =
1721          PERF_COUNT_HW_CACHE_LL                 <<  0  |
1722         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
1723         (PERF_COUNT_HW_CACHE_RESULT_MISS        << 16)                          },
1724 };
1725
1726 /*
1727  * Very detailed stats (-d -d), covering the instruction cache and the TLB caches:
1728  */
1729         struct perf_event_attr very_detailed_attrs[] = {
1730
1731   { .type = PERF_TYPE_HW_CACHE,
1732     .config =
1733          PERF_COUNT_HW_CACHE_L1I                <<  0  |
1734         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
1735         (PERF_COUNT_HW_CACHE_RESULT_ACCESS      << 16)                          },
1736
1737   { .type = PERF_TYPE_HW_CACHE,
1738     .config =
1739          PERF_COUNT_HW_CACHE_L1I                <<  0  |
1740         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
1741         (PERF_COUNT_HW_CACHE_RESULT_MISS        << 16)                          },
1742
1743   { .type = PERF_TYPE_HW_CACHE,
1744     .config =
1745          PERF_COUNT_HW_CACHE_DTLB               <<  0  |
1746         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
1747         (PERF_COUNT_HW_CACHE_RESULT_ACCESS      << 16)                          },
1748
1749   { .type = PERF_TYPE_HW_CACHE,
1750     .config =
1751          PERF_COUNT_HW_CACHE_DTLB               <<  0  |
1752         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
1753         (PERF_COUNT_HW_CACHE_RESULT_MISS        << 16)                          },
1754
1755   { .type = PERF_TYPE_HW_CACHE,
1756     .config =
1757          PERF_COUNT_HW_CACHE_ITLB               <<  0  |
1758         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
1759         (PERF_COUNT_HW_CACHE_RESULT_ACCESS      << 16)                          },
1760
1761   { .type = PERF_TYPE_HW_CACHE,
1762     .config =
1763          PERF_COUNT_HW_CACHE_ITLB               <<  0  |
1764         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
1765         (PERF_COUNT_HW_CACHE_RESULT_MISS        << 16)                          },
1766
1767 };
1768
1769 /*
1770  * Very, very detailed stats (-d -d -d), adding prefetch events:
1771  */
1772         struct perf_event_attr very_very_detailed_attrs[] = {
1773
1774   { .type = PERF_TYPE_HW_CACHE,
1775     .config =
1776          PERF_COUNT_HW_CACHE_L1D                <<  0  |
1777         (PERF_COUNT_HW_CACHE_OP_PREFETCH        <<  8) |
1778         (PERF_COUNT_HW_CACHE_RESULT_ACCESS      << 16)                          },
1779
1780   { .type = PERF_TYPE_HW_CACHE,
1781     .config =
1782          PERF_COUNT_HW_CACHE_L1D                <<  0  |
1783         (PERF_COUNT_HW_CACHE_OP_PREFETCH        <<  8) |
1784         (PERF_COUNT_HW_CACHE_RESULT_MISS        << 16)                          },
1785 };
1786         /* Set attrs if no event is selected and !null_run: */
1787         if (stat_config.null_run)
1788                 return 0;
1789
1790         if (transaction_run) {
1791                 struct parse_events_error errinfo;
1792                 /* Handle -T as -M transaction. Once platform specific metrics
1793                  * support has been added to the json files, all architectures
1794                  * will use this approach. To determine transaction support
1795                  * on an architecture test for such a metric name.
1796                  */
1797                 if (metricgroup__has_metric("transaction")) {
1798                         struct option opt = { .value = &evsel_list };
1799
1800                         return metricgroup__parse_groups(&opt, "transaction",
1801                                                          stat_config.metric_no_group,
1802                                                         stat_config.metric_no_merge,
1803                                                          &stat_config.metric_events);
1804                 }
1805
1806                 parse_events_error__init(&errinfo);
1807                 if (pmu_have_event("cpu", "cycles-ct") &&
1808                     pmu_have_event("cpu", "el-start"))
1809                         err = parse_events(evsel_list, transaction_attrs,
1810                                            &errinfo);
1811                 else
1812                         err = parse_events(evsel_list,
1813                                            transaction_limited_attrs,
1814                                            &errinfo);
1815                 if (err) {
1816                         fprintf(stderr, "Cannot set up transaction events\n");
1817                         parse_events_error__print(&errinfo, transaction_attrs);
1818                 }
1819                 parse_events_error__exit(&errinfo);
1820                 return err ? -1 : 0;
1821         }
1822
1823         if (smi_cost) {
1824                 struct parse_events_error errinfo;
1825                 int smi;
1826
1827                 if (sysfs__read_int(FREEZE_ON_SMI_PATH, &smi) < 0) {
1828                         fprintf(stderr, "freeze_on_smi is not supported.\n");
1829                         return -1;
1830                 }
1831
1832                 if (!smi) {
1833                         if (sysfs__write_int(FREEZE_ON_SMI_PATH, 1) < 0) {
1834                                 fprintf(stderr, "Failed to set freeze_on_smi.\n");
1835                                 return -1;
1836                         }
1837                         smi_reset = true;
1838                 }
1839
1840                 if (!pmu_have_event("msr", "aperf") ||
1841                     !pmu_have_event("msr", "smi")) {
1842                         fprintf(stderr, "To measure SMI cost, it needs "
1843                                 "msr/aperf/, msr/smi/ and cpu/cycles/ support\n");
1844                         return -1;
1845                 }
1846                 if (!force_metric_only)
1847                         stat_config.metric_only = true;
1848
1849                 parse_events_error__init(&errinfo);
1850                 err = parse_events(evsel_list, smi_cost_attrs, &errinfo);
1851                 if (err) {
1852                         parse_events_error__print(&errinfo, smi_cost_attrs);
1853                         fprintf(stderr, "Cannot set up SMI cost events\n");
1854                 }
1855                 parse_events_error__exit(&errinfo);
1856                 return err ? -1 : 0;
1857         }
1858
1859         if (topdown_run) {
1860                 const char **metric_attrs = topdown_metric_attrs;
1861                 unsigned int max_level = 1;
1862                 char *str = NULL;
1863                 bool warn = false;
1864                 const char *pmu_name = "cpu";
1865
1866                 if (!force_metric_only)
1867                         stat_config.metric_only = true;
1868
1869                 if (perf_pmu__has_hybrid()) {
1870                         if (!evsel_list->hybrid_pmu_name) {
1871                                 pr_warning("WARNING: default to use cpu_core topdown events\n");
1872                                 evsel_list->hybrid_pmu_name = perf_pmu__hybrid_type_to_pmu("core");
1873                         }
1874
1875                         pmu_name = evsel_list->hybrid_pmu_name;
1876                         if (!pmu_name)
1877                                 return -1;
1878                 }
1879
1880                 if (pmu_have_event(pmu_name, topdown_metric_L2_attrs[5])) {
1881                         metric_attrs = topdown_metric_L2_attrs;
1882                         max_level = 2;
1883                 }
1884
1885                 if (stat_config.topdown_level > max_level) {
1886                         pr_err("Invalid top-down metrics level. The max level is %u.\n", max_level);
1887                         return -1;
1888                 } else if (!stat_config.topdown_level)
1889                         stat_config.topdown_level = max_level;
1890
1891                 if (topdown_filter_events(metric_attrs, &str, 1, pmu_name) < 0) {
1892                         pr_err("Out of memory\n");
1893                         return -1;
1894                 }
1895
1896                 if (metric_attrs[0] && str) {
1897                         if (!stat_config.interval && !stat_config.metric_only) {
1898                                 fprintf(stat_config.output,
1899                                         "Topdown accuracy may decrease when measuring long periods.\n"
1900                                         "Please print the result regularly, e.g. -I1000\n");
1901                         }
1902                         goto setup_metrics;
1903                 }
1904
1905                 zfree(&str);
1906
1907                 if (stat_config.aggr_mode != AGGR_GLOBAL &&
1908                     stat_config.aggr_mode != AGGR_CORE) {
1909                         pr_err("top down event configuration requires --per-core mode\n");
1910                         return -1;
1911                 }
1912                 stat_config.aggr_mode = AGGR_CORE;
1913                 if (nr_cgroups || !target__has_cpu(&target)) {
1914                         pr_err("top down event configuration requires system-wide mode (-a)\n");
1915                         return -1;
1916                 }
1917
1918                 if (topdown_filter_events(topdown_attrs, &str,
1919                                 arch_topdown_check_group(&warn),
1920                                 pmu_name) < 0) {
1921                         pr_err("Out of memory\n");
1922                         return -1;
1923                 }
1924
1925                 if (topdown_attrs[0] && str) {
1926                         struct parse_events_error errinfo;
1927                         if (warn)
1928                                 arch_topdown_group_warn();
1929 setup_metrics:
1930                         parse_events_error__init(&errinfo);
1931                         err = parse_events(evsel_list, str, &errinfo);
1932                         if (err) {
1933                                 fprintf(stderr,
1934                                         "Cannot set up top down events %s: %d\n",
1935                                         str, err);
1936                                 parse_events_error__print(&errinfo, str);
1937                                 parse_events_error__exit(&errinfo);
1938                                 free(str);
1939                                 return -1;
1940                         }
1941                         parse_events_error__exit(&errinfo);
1942                 } else {
1943                         fprintf(stderr, "System does not support topdown\n");
1944                         return -1;
1945                 }
1946                 free(str);
1947         }
1948
1949         if (!evsel_list->core.nr_entries) {
1950                 if (perf_pmu__has_hybrid()) {
1951                         struct parse_events_error errinfo;
1952                         const char *hybrid_str = "cycles,instructions,branches,branch-misses";
1953
1954                         if (target__has_cpu(&target))
1955                                 default_sw_attrs[0].config = PERF_COUNT_SW_CPU_CLOCK;
1956
1957                         if (evlist__add_default_attrs(evsel_list,
1958                                                       default_sw_attrs) < 0) {
1959                                 return -1;
1960                         }
1961
1962                         parse_events_error__init(&errinfo);
1963                         err = parse_events(evsel_list, hybrid_str, &errinfo);
1964                         if (err) {
1965                                 fprintf(stderr,
1966                                         "Cannot set up hybrid events %s: %d\n",
1967                                         hybrid_str, err);
1968                                 parse_events_error__print(&errinfo, hybrid_str);
1969                         }
1970                         parse_events_error__exit(&errinfo);
1971                         return err ? -1 : 0;
1972                 }
1973
1974                 if (target__has_cpu(&target))
1975                         default_attrs0[0].config = PERF_COUNT_SW_CPU_CLOCK;
1976
1977                 if (evlist__add_default_attrs(evsel_list, default_attrs0) < 0)
1978                         return -1;
1979                 if (pmu_have_event("cpu", "stalled-cycles-frontend")) {
1980                         if (evlist__add_default_attrs(evsel_list, frontend_attrs) < 0)
1981                                 return -1;
1982                 }
1983                 if (pmu_have_event("cpu", "stalled-cycles-backend")) {
1984                         if (evlist__add_default_attrs(evsel_list, backend_attrs) < 0)
1985                                 return -1;
1986                 }
1987                 if (evlist__add_default_attrs(evsel_list, default_attrs1) < 0)
1988                         return -1;
1989
1990                 stat_config.topdown_level = TOPDOWN_MAX_LEVEL;
1991                 if (arch_evlist__add_default_attrs(evsel_list) < 0)
1992                         return -1;
1993         }
1994
1995         /* Detailed events get appended to the event list: */
1996
1997         if (detailed_run <  1)
1998                 return 0;
1999
2000         /* Append detailed run extra attributes: */
2001         if (evlist__add_default_attrs(evsel_list, detailed_attrs) < 0)
2002                 return -1;
2003
2004         if (detailed_run < 2)
2005                 return 0;
2006
2007         /* Append very detailed run extra attributes: */
2008         if (evlist__add_default_attrs(evsel_list, very_detailed_attrs) < 0)
2009                 return -1;
2010
2011         if (detailed_run < 3)
2012                 return 0;
2013
2014         /* Append very, very detailed run extra attributes: */
2015         return evlist__add_default_attrs(evsel_list, very_very_detailed_attrs);
2016 }
2017
2018 static const char * const stat_record_usage[] = {
2019         "perf stat record [<options>]",
2020         NULL,
2021 };
2022
2023 static void init_features(struct perf_session *session)
2024 {
2025         int feat;
2026
2027         for (feat = HEADER_FIRST_FEATURE; feat < HEADER_LAST_FEATURE; feat++)
2028                 perf_header__set_feat(&session->header, feat);
2029
2030         perf_header__clear_feat(&session->header, HEADER_DIR_FORMAT);
2031         perf_header__clear_feat(&session->header, HEADER_BUILD_ID);
2032         perf_header__clear_feat(&session->header, HEADER_TRACING_DATA);
2033         perf_header__clear_feat(&session->header, HEADER_BRANCH_STACK);
2034         perf_header__clear_feat(&session->header, HEADER_AUXTRACE);
2035 }
2036
2037 static int __cmd_record(int argc, const char **argv)
2038 {
2039         struct perf_session *session;
2040         struct perf_data *data = &perf_stat.data;
2041
2042         argc = parse_options(argc, argv, stat_options, stat_record_usage,
2043                              PARSE_OPT_STOP_AT_NON_OPTION);
2044
2045         if (output_name)
2046                 data->path = output_name;
2047
2048         if (stat_config.run_count != 1 || forever) {
2049                 pr_err("Cannot use -r option with perf stat record.\n");
2050                 return -1;
2051         }
2052
2053         session = perf_session__new(data, NULL);
2054         if (IS_ERR(session)) {
2055                 pr_err("Perf session creation failed\n");
2056                 return PTR_ERR(session);
2057         }
2058
2059         init_features(session);
2060
2061         session->evlist   = evsel_list;
2062         perf_stat.session = session;
2063         perf_stat.record  = true;
2064         return argc;
2065 }
2066
2067 static int process_stat_round_event(struct perf_session *session,
2068                                     union perf_event *event)
2069 {
2070         struct perf_record_stat_round *stat_round = &event->stat_round;
2071         struct evsel *counter;
2072         struct timespec tsh, *ts = NULL;
2073         const char **argv = session->header.env.cmdline_argv;
2074         int argc = session->header.env.nr_cmdline;
2075
2076         evlist__for_each_entry(evsel_list, counter)
2077                 perf_stat_process_counter(&stat_config, counter);
2078
2079         if (stat_round->type == PERF_STAT_ROUND_TYPE__FINAL)
2080                 update_stats(&walltime_nsecs_stats, stat_round->time);
2081
2082         if (stat_config.interval && stat_round->time) {
2083                 tsh.tv_sec  = stat_round->time / NSEC_PER_SEC;
2084                 tsh.tv_nsec = stat_round->time % NSEC_PER_SEC;
2085                 ts = &tsh;
2086         }
2087
2088         print_counters(ts, argc, argv);
2089         return 0;
2090 }
2091
2092 static
2093 int process_stat_config_event(struct perf_session *session,
2094                               union perf_event *event)
2095 {
2096         struct perf_tool *tool = session->tool;
2097         struct perf_stat *st = container_of(tool, struct perf_stat, tool);
2098
2099         perf_event__read_stat_config(&stat_config, &event->stat_config);
2100
2101         if (perf_cpu_map__empty(st->cpus)) {
2102                 if (st->aggr_mode != AGGR_UNSET)
2103                         pr_warning("warning: processing task data, aggregation mode not set\n");
2104                 return 0;
2105         }
2106
2107         if (st->aggr_mode != AGGR_UNSET)
2108                 stat_config.aggr_mode = st->aggr_mode;
2109
2110         if (perf_stat.data.is_pipe)
2111                 perf_stat_init_aggr_mode();
2112         else
2113                 perf_stat_init_aggr_mode_file(st);
2114
2115         return 0;
2116 }
2117
2118 static int set_maps(struct perf_stat *st)
2119 {
2120         if (!st->cpus || !st->threads)
2121                 return 0;
2122
2123         if (WARN_ONCE(st->maps_allocated, "stats double allocation\n"))
2124                 return -EINVAL;
2125
2126         perf_evlist__set_maps(&evsel_list->core, st->cpus, st->threads);
2127
2128         if (evlist__alloc_stats(evsel_list, true))
2129                 return -ENOMEM;
2130
2131         st->maps_allocated = true;
2132         return 0;
2133 }
2134
2135 static
2136 int process_thread_map_event(struct perf_session *session,
2137                              union perf_event *event)
2138 {
2139         struct perf_tool *tool = session->tool;
2140         struct perf_stat *st = container_of(tool, struct perf_stat, tool);
2141
2142         if (st->threads) {
2143                 pr_warning("Extra thread map event, ignoring.\n");
2144                 return 0;
2145         }
2146
2147         st->threads = thread_map__new_event(&event->thread_map);
2148         if (!st->threads)
2149                 return -ENOMEM;
2150
2151         return set_maps(st);
2152 }
2153
2154 static
2155 int process_cpu_map_event(struct perf_session *session,
2156                           union perf_event *event)
2157 {
2158         struct perf_tool *tool = session->tool;
2159         struct perf_stat *st = container_of(tool, struct perf_stat, tool);
2160         struct perf_cpu_map *cpus;
2161
2162         if (st->cpus) {
2163                 pr_warning("Extra cpu map event, ignoring.\n");
2164                 return 0;
2165         }
2166
2167         cpus = cpu_map__new_data(&event->cpu_map.data);
2168         if (!cpus)
2169                 return -ENOMEM;
2170
2171         st->cpus = cpus;
2172         return set_maps(st);
2173 }
2174
2175 static const char * const stat_report_usage[] = {
2176         "perf stat report [<options>]",
2177         NULL,
2178 };
2179
2180 static struct perf_stat perf_stat = {
2181         .tool = {
2182                 .attr           = perf_event__process_attr,
2183                 .event_update   = perf_event__process_event_update,
2184                 .thread_map     = process_thread_map_event,
2185                 .cpu_map        = process_cpu_map_event,
2186                 .stat_config    = process_stat_config_event,
2187                 .stat           = perf_event__process_stat_event,
2188                 .stat_round     = process_stat_round_event,
2189         },
2190         .aggr_mode = AGGR_UNSET,
2191 };
2192
2193 static int __cmd_report(int argc, const char **argv)
2194 {
2195         struct perf_session *session;
2196         const struct option options[] = {
2197         OPT_STRING('i', "input", &input_name, "file", "input file name"),
2198         OPT_SET_UINT(0, "per-socket", &perf_stat.aggr_mode,
2199                      "aggregate counts per processor socket", AGGR_SOCKET),
2200         OPT_SET_UINT(0, "per-die", &perf_stat.aggr_mode,
2201                      "aggregate counts per processor die", AGGR_DIE),
2202         OPT_SET_UINT(0, "per-core", &perf_stat.aggr_mode,
2203                      "aggregate counts per physical processor core", AGGR_CORE),
2204         OPT_SET_UINT(0, "per-node", &perf_stat.aggr_mode,
2205                      "aggregate counts per numa node", AGGR_NODE),
2206         OPT_SET_UINT('A', "no-aggr", &perf_stat.aggr_mode,
2207                      "disable CPU count aggregation", AGGR_NONE),
2208         OPT_END()
2209         };
2210         struct stat st;
2211         int ret;
2212
2213         argc = parse_options(argc, argv, options, stat_report_usage, 0);
2214
2215         if (!input_name || !strlen(input_name)) {
2216                 if (!fstat(STDIN_FILENO, &st) && S_ISFIFO(st.st_mode))
2217                         input_name = "-";
2218                 else
2219                         input_name = "perf.data";
2220         }
2221
2222         perf_stat.data.path = input_name;
2223         perf_stat.data.mode = PERF_DATA_MODE_READ;
2224
2225         session = perf_session__new(&perf_stat.data, &perf_stat.tool);
2226         if (IS_ERR(session))
2227                 return PTR_ERR(session);
2228
2229         perf_stat.session  = session;
2230         stat_config.output = stderr;
2231         evsel_list         = session->evlist;
2232
2233         ret = perf_session__process_events(session);
2234         if (ret)
2235                 return ret;
2236
2237         perf_session__delete(session);
2238         return 0;
2239 }
2240
2241 static void setup_system_wide(int forks)
2242 {
2243         /*
2244          * Make system wide (-a) the default target if
2245          * no target was specified and one of following
2246          * conditions is met:
2247          *
2248          *   - there's no workload specified
2249          *   - there is workload specified but all requested
2250          *     events are system wide events
2251          */
2252         if (!target__none(&target))
2253                 return;
2254
2255         if (!forks)
2256                 target.system_wide = true;
2257         else {
2258                 struct evsel *counter;
2259
2260                 evlist__for_each_entry(evsel_list, counter) {
2261                         if (!counter->core.requires_cpu &&
2262                             strcmp(counter->name, "duration_time")) {
2263                                 return;
2264                         }
2265                 }
2266
2267                 if (evsel_list->core.nr_entries)
2268                         target.system_wide = true;
2269         }
2270 }
2271
2272 int cmd_stat(int argc, const char **argv)
2273 {
2274         const char * const stat_usage[] = {
2275                 "perf stat [<options>] [<command>]",
2276                 NULL
2277         };
2278         int status = -EINVAL, run_idx, err;
2279         const char *mode;
2280         FILE *output = stderr;
2281         unsigned int interval, timeout;
2282         const char * const stat_subcommands[] = { "record", "report" };
2283         char errbuf[BUFSIZ];
2284
2285         setlocale(LC_ALL, "");
2286
2287         evsel_list = evlist__new();
2288         if (evsel_list == NULL)
2289                 return -ENOMEM;
2290
2291         parse_events__shrink_config_terms();
2292
2293         /* String-parsing callback-based options would segfault when negated */
2294         set_option_flag(stat_options, 'e', "event", PARSE_OPT_NONEG);
2295         set_option_flag(stat_options, 'M', "metrics", PARSE_OPT_NONEG);
2296         set_option_flag(stat_options, 'G', "cgroup", PARSE_OPT_NONEG);
2297
2298         argc = parse_options_subcommand(argc, argv, stat_options, stat_subcommands,
2299                                         (const char **) stat_usage,
2300                                         PARSE_OPT_STOP_AT_NON_OPTION);
2301         perf_stat__collect_metric_expr(evsel_list);
2302         perf_stat__init_shadow_stats();
2303
2304         if (stat_config.csv_sep) {
2305                 stat_config.csv_output = true;
2306                 if (!strcmp(stat_config.csv_sep, "\\t"))
2307                         stat_config.csv_sep = "\t";
2308         } else
2309                 stat_config.csv_sep = DEFAULT_SEPARATOR;
2310
2311         if (argc && strlen(argv[0]) > 2 && strstarts("record", argv[0])) {
2312                 argc = __cmd_record(argc, argv);
2313                 if (argc < 0)
2314                         return -1;
2315         } else if (argc && strlen(argv[0]) > 2 && strstarts("report", argv[0]))
2316                 return __cmd_report(argc, argv);
2317
2318         interval = stat_config.interval;
2319         timeout = stat_config.timeout;
2320
2321         /*
2322          * For record command the -o is already taken care of.
2323          */
2324         if (!STAT_RECORD && output_name && strcmp(output_name, "-"))
2325                 output = NULL;
2326
2327         if (output_name && output_fd) {
2328                 fprintf(stderr, "cannot use both --output and --log-fd\n");
2329                 parse_options_usage(stat_usage, stat_options, "o", 1);
2330                 parse_options_usage(NULL, stat_options, "log-fd", 0);
2331                 goto out;
2332         }
2333
2334         if (stat_config.metric_only && stat_config.aggr_mode == AGGR_THREAD) {
2335                 fprintf(stderr, "--metric-only is not supported with --per-thread\n");
2336                 goto out;
2337         }
2338
2339         if (stat_config.metric_only && stat_config.run_count > 1) {
2340                 fprintf(stderr, "--metric-only is not supported with -r\n");
2341                 goto out;
2342         }
2343
2344         if (stat_config.walltime_run_table && stat_config.run_count <= 1) {
2345                 fprintf(stderr, "--table is only supported with -r\n");
2346                 parse_options_usage(stat_usage, stat_options, "r", 1);
2347                 parse_options_usage(NULL, stat_options, "table", 0);
2348                 goto out;
2349         }
2350
2351         if (output_fd < 0) {
2352                 fprintf(stderr, "argument to --log-fd must be a > 0\n");
2353                 parse_options_usage(stat_usage, stat_options, "log-fd", 0);
2354                 goto out;
2355         }
2356
2357         if (!output && !stat_config.quiet) {
2358                 struct timespec tm;
2359                 mode = append_file ? "a" : "w";
2360
2361                 output = fopen(output_name, mode);
2362                 if (!output) {
2363                         perror("failed to create output file");
2364                         return -1;
2365                 }
2366                 clock_gettime(CLOCK_REALTIME, &tm);
2367                 fprintf(output, "# started on %s\n", ctime(&tm.tv_sec));
2368         } else if (output_fd > 0) {
2369                 mode = append_file ? "a" : "w";
2370                 output = fdopen(output_fd, mode);
2371                 if (!output) {
2372                         perror("Failed opening logfd");
2373                         return -errno;
2374                 }
2375         }
2376
2377         stat_config.output = output;
2378
2379         /*
2380          * let the spreadsheet do the pretty-printing
2381          */
2382         if (stat_config.csv_output) {
2383                 /* User explicitly passed -B? */
2384                 if (big_num_opt == 1) {
2385                         fprintf(stderr, "-B option not supported with -x\n");
2386                         parse_options_usage(stat_usage, stat_options, "B", 1);
2387                         parse_options_usage(NULL, stat_options, "x", 1);
2388                         goto out;
2389                 } else /* Nope, so disable big number formatting */
2390                         stat_config.big_num = false;
2391         } else if (big_num_opt == 0) /* User passed --no-big-num */
2392                 stat_config.big_num = false;
2393
2394         err = target__validate(&target);
2395         if (err) {
2396                 target__strerror(&target, err, errbuf, BUFSIZ);
2397                 pr_warning("%s\n", errbuf);
2398         }
2399
2400         setup_system_wide(argc);
2401
2402         /*
2403          * Display user/system times only for single
2404          * run and when there's specified tracee.
2405          */
2406         if ((stat_config.run_count == 1) && target__none(&target))
2407                 stat_config.ru_display = true;
2408
2409         if (stat_config.run_count < 0) {
2410                 pr_err("Run count must be a positive number\n");
2411                 parse_options_usage(stat_usage, stat_options, "r", 1);
2412                 goto out;
2413         } else if (stat_config.run_count == 0) {
2414                 forever = true;
2415                 stat_config.run_count = 1;
2416         }
2417
2418         if (stat_config.walltime_run_table) {
2419                 stat_config.walltime_run = zalloc(stat_config.run_count * sizeof(stat_config.walltime_run[0]));
2420                 if (!stat_config.walltime_run) {
2421                         pr_err("failed to setup -r option");
2422                         goto out;
2423                 }
2424         }
2425
2426         if ((stat_config.aggr_mode == AGGR_THREAD) &&
2427                 !target__has_task(&target)) {
2428                 if (!target.system_wide || target.cpu_list) {
2429                         fprintf(stderr, "The --per-thread option is only "
2430                                 "available when monitoring via -p -t -a "
2431                                 "options or only --per-thread.\n");
2432                         parse_options_usage(NULL, stat_options, "p", 1);
2433                         parse_options_usage(NULL, stat_options, "t", 1);
2434                         goto out;
2435                 }
2436         }
2437
2438         /*
2439          * no_aggr, cgroup are for system-wide only
2440          * --per-thread is aggregated per thread, we dont mix it with cpu mode
2441          */
2442         if (((stat_config.aggr_mode != AGGR_GLOBAL &&
2443               stat_config.aggr_mode != AGGR_THREAD) ||
2444              (nr_cgroups || stat_config.cgroup_list)) &&
2445             !target__has_cpu(&target)) {
2446                 fprintf(stderr, "both cgroup and no-aggregation "
2447                         "modes only available in system-wide mode\n");
2448
2449                 parse_options_usage(stat_usage, stat_options, "G", 1);
2450                 parse_options_usage(NULL, stat_options, "A", 1);
2451                 parse_options_usage(NULL, stat_options, "a", 1);
2452                 parse_options_usage(NULL, stat_options, "for-each-cgroup", 0);
2453                 goto out;
2454         }
2455
2456         if (stat_config.iostat_run) {
2457                 status = iostat_prepare(evsel_list, &stat_config);
2458                 if (status)
2459                         goto out;
2460                 if (iostat_mode == IOSTAT_LIST) {
2461                         iostat_list(evsel_list, &stat_config);
2462                         goto out;
2463                 } else if (verbose)
2464                         iostat_list(evsel_list, &stat_config);
2465                 if (iostat_mode == IOSTAT_RUN && !target__has_cpu(&target))
2466                         target.system_wide = true;
2467         }
2468
2469         if (add_default_attributes())
2470                 goto out;
2471
2472         if (stat_config.cgroup_list) {
2473                 if (nr_cgroups > 0) {
2474                         pr_err("--cgroup and --for-each-cgroup cannot be used together\n");
2475                         parse_options_usage(stat_usage, stat_options, "G", 1);
2476                         parse_options_usage(NULL, stat_options, "for-each-cgroup", 0);
2477                         goto out;
2478                 }
2479
2480                 if (evlist__expand_cgroup(evsel_list, stat_config.cgroup_list,
2481                                           &stat_config.metric_events, true) < 0) {
2482                         parse_options_usage(stat_usage, stat_options,
2483                                             "for-each-cgroup", 0);
2484                         goto out;
2485                 }
2486         }
2487
2488         if ((stat_config.aggr_mode == AGGR_THREAD) && (target.system_wide))
2489                 target.per_thread = true;
2490
2491         if (evlist__fix_hybrid_cpus(evsel_list, target.cpu_list)) {
2492                 pr_err("failed to use cpu list %s\n", target.cpu_list);
2493                 goto out;
2494         }
2495
2496         target.hybrid = perf_pmu__has_hybrid();
2497         if (evlist__create_maps(evsel_list, &target) < 0) {
2498                 if (target__has_task(&target)) {
2499                         pr_err("Problems finding threads of monitor\n");
2500                         parse_options_usage(stat_usage, stat_options, "p", 1);
2501                         parse_options_usage(NULL, stat_options, "t", 1);
2502                 } else if (target__has_cpu(&target)) {
2503                         perror("failed to parse CPUs map");
2504                         parse_options_usage(stat_usage, stat_options, "C", 1);
2505                         parse_options_usage(NULL, stat_options, "a", 1);
2506                 }
2507                 goto out;
2508         }
2509
2510         evlist__check_cpu_maps(evsel_list);
2511
2512         /*
2513          * Initialize thread_map with comm names,
2514          * so we could print it out on output.
2515          */
2516         if (stat_config.aggr_mode == AGGR_THREAD) {
2517                 thread_map__read_comms(evsel_list->core.threads);
2518                 if (target.system_wide) {
2519                         if (runtime_stat_new(&stat_config,
2520                                 perf_thread_map__nr(evsel_list->core.threads))) {
2521                                 goto out;
2522                         }
2523                 }
2524         }
2525
2526         if (stat_config.aggr_mode == AGGR_NODE)
2527                 cpu__setup_cpunode_map();
2528
2529         if (stat_config.times && interval)
2530                 interval_count = true;
2531         else if (stat_config.times && !interval) {
2532                 pr_err("interval-count option should be used together with "
2533                                 "interval-print.\n");
2534                 parse_options_usage(stat_usage, stat_options, "interval-count", 0);
2535                 parse_options_usage(stat_usage, stat_options, "I", 1);
2536                 goto out;
2537         }
2538
2539         if (timeout && timeout < 100) {
2540                 if (timeout < 10) {
2541                         pr_err("timeout must be >= 10ms.\n");
2542                         parse_options_usage(stat_usage, stat_options, "timeout", 0);
2543                         goto out;
2544                 } else
2545                         pr_warning("timeout < 100ms. "
2546                                    "The overhead percentage could be high in some cases. "
2547                                    "Please proceed with caution.\n");
2548         }
2549         if (timeout && interval) {
2550                 pr_err("timeout option is not supported with interval-print.\n");
2551                 parse_options_usage(stat_usage, stat_options, "timeout", 0);
2552                 parse_options_usage(stat_usage, stat_options, "I", 1);
2553                 goto out;
2554         }
2555
2556         if (evlist__alloc_stats(evsel_list, interval))
2557                 goto out;
2558
2559         if (perf_stat_init_aggr_mode())
2560                 goto out;
2561
2562         /*
2563          * Set sample_type to PERF_SAMPLE_IDENTIFIER, which should be harmless
2564          * while avoiding that older tools show confusing messages.
2565          *
2566          * However for pipe sessions we need to keep it zero,
2567          * because script's perf_evsel__check_attr is triggered
2568          * by attr->sample_type != 0, and we can't run it on
2569          * stat sessions.
2570          */
2571         stat_config.identifier = !(STAT_RECORD && perf_stat.data.is_pipe);
2572
2573         /*
2574          * We dont want to block the signals - that would cause
2575          * child tasks to inherit that and Ctrl-C would not work.
2576          * What we want is for Ctrl-C to work in the exec()-ed
2577          * task, but being ignored by perf stat itself:
2578          */
2579         atexit(sig_atexit);
2580         if (!forever)
2581                 signal(SIGINT,  skip_signal);
2582         signal(SIGCHLD, skip_signal);
2583         signal(SIGALRM, skip_signal);
2584         signal(SIGABRT, skip_signal);
2585
2586         if (evlist__initialize_ctlfd(evsel_list, stat_config.ctl_fd, stat_config.ctl_fd_ack))
2587                 goto out;
2588
2589         /* Enable ignoring missing threads when -p option is defined. */
2590         evlist__first(evsel_list)->ignore_missing_thread = target.pid;
2591         status = 0;
2592         for (run_idx = 0; forever || run_idx < stat_config.run_count; run_idx++) {
2593                 if (stat_config.run_count != 1 && verbose > 0)
2594                         fprintf(output, "[ perf stat: executing run #%d ... ]\n",
2595                                 run_idx + 1);
2596
2597                 if (run_idx != 0)
2598                         evlist__reset_prev_raw_counts(evsel_list);
2599
2600                 status = run_perf_stat(argc, argv, run_idx);
2601                 if (forever && status != -1 && !interval) {
2602                         print_counters(NULL, argc, argv);
2603                         perf_stat__reset_stats();
2604                 }
2605         }
2606
2607         if (!forever && status != -1 && (!interval || stat_config.summary))
2608                 print_counters(NULL, argc, argv);
2609
2610         evlist__finalize_ctlfd(evsel_list);
2611
2612         if (STAT_RECORD) {
2613                 /*
2614                  * We synthesize the kernel mmap record just so that older tools
2615                  * don't emit warnings about not being able to resolve symbols
2616                  * due to /proc/sys/kernel/kptr_restrict settings and instead provide
2617                  * a saner message about no samples being in the perf.data file.
2618                  *
2619                  * This also serves to suppress a warning about f_header.data.size == 0
2620                  * in header.c at the moment 'perf stat record' gets introduced, which
2621                  * is not really needed once we start adding the stat specific PERF_RECORD_
2622                  * records, but the need to suppress the kptr_restrict messages in older
2623                  * tools remain  -acme
2624                  */
2625                 int fd = perf_data__fd(&perf_stat.data);
2626
2627                 err = perf_event__synthesize_kernel_mmap((void *)&perf_stat,
2628                                                          process_synthesized_event,
2629                                                          &perf_stat.session->machines.host);
2630                 if (err) {
2631                         pr_warning("Couldn't synthesize the kernel mmap record, harmless, "
2632                                    "older tools may produce warnings about this file\n.");
2633                 }
2634
2635                 if (!interval) {
2636                         if (WRITE_STAT_ROUND_EVENT(walltime_nsecs_stats.max, FINAL))
2637                                 pr_err("failed to write stat round event\n");
2638                 }
2639
2640                 if (!perf_stat.data.is_pipe) {
2641                         perf_stat.session->header.data_size += perf_stat.bytes_written;
2642                         perf_session__write_header(perf_stat.session, evsel_list, fd, true);
2643                 }
2644
2645                 evlist__close(evsel_list);
2646                 perf_session__delete(perf_stat.session);
2647         }
2648
2649         perf_stat__exit_aggr_mode();
2650         evlist__free_stats(evsel_list);
2651 out:
2652         if (stat_config.iostat_run)
2653                 iostat_release(evsel_list);
2654
2655         zfree(&stat_config.walltime_run);
2656
2657         if (smi_cost && smi_reset)
2658                 sysfs__write_int(FREEZE_ON_SMI_PATH, 0);
2659
2660         evlist__delete(evsel_list);
2661
2662         metricgroup__rblist_exit(&stat_config.metric_events);
2663         runtime_stat_delete(&stat_config);
2664         evlist__close_control(stat_config.ctl_fd, stat_config.ctl_fd_ack, &stat_config.ctl_fd_close);
2665
2666         return status;
2667 }