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