tools/perf/builtin-stat.c

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