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