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