tools/perf/builtin-stat.c

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