tools/perf/builtin-stat.c

   1 /*
   2  * builtin-stat.c
   3  *
   4  * Builtin stat command: Give a precise performance counters summary
   5  * overview about any workload, CPU or specific PID.
   6  *
   7  * Sample output:
   8
   9    $ perf stat ./hackbench 10
  10
  11   Time: 0.118
  12
  13   Performance counter stats for './hackbench 10':
  14
  15        1708.761321 task-clock                #   11.037 CPUs utilized
  16             41,190 context-switches          #    0.024 M/sec
  17              6,735 CPU-migrations            #    0.004 M/sec
  18             17,318 page-faults               #    0.010 M/sec
  19      5,205,202,243 cycles                    #    3.046 GHz
  20      3,856,436,920 stalled-cycles-frontend   #   74.09% frontend cycles idle
  21      1,600,790,871 stalled-cycles-backend    #   30.75% backend  cycles idle
  22      2,603,501,247 instructions              #    0.50  insns per cycle
  23                                              #    1.48  stalled cycles per insn
  24        484,357,498 branches                  #  283.455 M/sec
  25          6,388,934 branch-misses             #    1.32% of all branches
  26
  27         0.154822978  seconds time elapsed
  28
  29  *
  30  * Copyright (C) 2008-2011, Red Hat Inc, Ingo Molnar <mingo@redhat.com>
  31  *
  32  * Improvements and fixes by:
  33  *
  34  *   Arjan van de Ven <arjan@linux.intel.com>
  35  *   Yanmin Zhang <yanmin.zhang@intel.com>
  36  *   Wu Fengguang <fengguang.wu@intel.com>
  37  *   Mike Galbraith <efault@gmx.de>
  38  *   Paul Mackerras <paulus@samba.org>
  39  *   Jaswinder Singh Rajput <jaswinder@kernel.org>
  40  *
  41  * Released under the GPL v2. (and only v2, not any later version)
  42  */
  43
  44 #include "perf.h"
  45 #include "builtin.h"
  46 #include "util/cgroup.h"
  47 #include "util/util.h"
  48 #include <subcmd/parse-options.h>
  49 #include "util/parse-events.h"
  50 #include "util/pmu.h"
  51 #include "util/event.h"
  52 #include "util/evlist.h"
  53 #include "util/evsel.h"
  54 #include "util/debug.h"
  55 #include "util/drv_configs.h"
  56 #include "util/color.h"
  57 #include "util/stat.h"
  58 #include "util/header.h"
  59 #include "util/cpumap.h"
  60 #include "util/thread.h"
  61 #include "util/thread_map.h"
  62 #include "util/counts.h"
  63 #include "util/group.h"
  64 #include "util/session.h"
  65 #include "util/tool.h"
  66 #include "util/group.h"
  67 #include "asm/bug.h"
  68
  69 #include <linux/time64.h>
  70 #include <api/fs/fs.h>
  71 #include <stdlib.h>
  72 #include <sys/prctl.h>
  73 #include <locale.h>
  74 #include <math.h>
  75
  76 #define DEFAULT_SEPARATOR       " "
  77 #define CNTR_NOT_SUPPORTED      "<not supported>"
  78 #define CNTR_NOT_COUNTED        "<not counted>"
  79
  80 static void print_counters(struct timespec *ts, int argc, const char **argv);
  81
  82 /* Default events used for perf stat -T */
  83 static const char *transaction_attrs = {
  84         "task-clock,"
  85         "{"
  86         "instructions,"
  87         "cycles,"
  88         "cpu/cycles-t/,"
  89         "cpu/tx-start/,"
  90         "cpu/el-start/,"
  91         "cpu/cycles-ct/"
  92         "}"
  93 };
  94
  95 /* More limited version when the CPU does not have all events. */
  96 static const char * transaction_limited_attrs = {
  97         "task-clock,"
  98         "{"
  99         "instructions,"
 100         "cycles,"
 101         "cpu/cycles-t/,"
 102         "cpu/tx-start/"
 103         "}"
 104 };
 105
 106 static const char * topdown_attrs[] = {
 107         "topdown-total-slots",
 108         "topdown-slots-retired",
 109         "topdown-recovery-bubbles",
 110         "topdown-fetch-bubbles",
 111         "topdown-slots-issued",
 112         NULL,
 113 };
 114
 115 static struct perf_evlist       *evsel_list;
 116
 117 static struct target target = {
 118         .uid    = UINT_MAX,
 119 };
 120
 121 typedef int (*aggr_get_id_t)(struct cpu_map *m, int cpu);
 122
 123 static int                      run_count                       =  1;
 124 static bool                     no_inherit                      = false;
 125 static volatile pid_t           child_pid                       = -1;
 126 static bool                     null_run                        =  false;
 127 static int                      detailed_run                    =  0;
 128 static bool                     transaction_run;
 129 static bool                     topdown_run                     = false;
 130 static bool                     big_num                         =  true;
 131 static int                      big_num_opt                     =  -1;
 132 static const char               *csv_sep                        = NULL;
 133 static bool                     csv_output                      = false;
 134 static bool                     group                           = false;
 135 static const char               *pre_cmd                        = NULL;
 136 static const char               *post_cmd                       = NULL;
 137 static bool                     sync_run                        = false;
 138 static unsigned int             initial_delay                   = 0;
 139 static unsigned int             unit_width                      = 4; /* strlen("unit") */
 140 static bool                     forever                         = false;
 141 static bool                     metric_only                     = false;
 142 static bool                     force_metric_only               = false;
 143 static struct timespec          ref_time;
 144 static struct cpu_map           *aggr_map;
 145 static aggr_get_id_t            aggr_get_id;
 146 static bool                     append_file;
 147 static const char               *output_name;
 148 static int                      output_fd;
 149 static int                      print_free_counters_hint;
 150
 151 struct perf_stat {
 152         bool                     record;
 153         struct perf_data_file    file;
 154         struct perf_session     *session;
 155         u64                      bytes_written;
 156         struct perf_tool         tool;
 157         bool                     maps_allocated;
 158         struct cpu_map          *cpus;
 159         struct thread_map       *threads;
 160         enum aggr_mode           aggr_mode;
 161 };
 162
 163 static struct perf_stat         perf_stat;
 164 #define STAT_RECORD             perf_stat.record
 165
 166 static volatile int done = 0;
 167
 168 static struct perf_stat_config stat_config = {
 169         .aggr_mode      = AGGR_GLOBAL,
 170         .scale          = true,
 171 };
 172
 173 static inline void diff_timespec(struct timespec *r, struct timespec *a,
 174                                  struct timespec *b)
 175 {
 176         r->tv_sec = a->tv_sec - b->tv_sec;
 177         if (a->tv_nsec < b->tv_nsec) {
 178                 r->tv_nsec = a->tv_nsec + NSEC_PER_SEC - b->tv_nsec;
 179                 r->tv_sec--;
 180         } else {
 181                 r->tv_nsec = a->tv_nsec - b->tv_nsec ;
 182         }
 183 }
 184
 185 static void perf_stat__reset_stats(void)
 186 {
 187         perf_evlist__reset_stats(evsel_list);
 188         perf_stat__reset_shadow_stats();
 189 }
 190
 191 static int create_perf_stat_counter(struct perf_evsel *evsel)
 192 {
 193         struct perf_event_attr *attr = &evsel->attr;
 194
 195         if (stat_config.scale)
 196                 attr->read_format = PERF_FORMAT_TOTAL_TIME_ENABLED |
 197                                     PERF_FORMAT_TOTAL_TIME_RUNNING;
 198
 199         attr->inherit = !no_inherit;
 200
 201         /*
 202          * Some events get initialized with sample_(period/type) set,
 203          * like tracepoints. Clear it up for counting.
 204          */
 205         attr->sample_period = 0;
 206
 207         /*
 208          * But set sample_type to PERF_SAMPLE_IDENTIFIER, which should be harmless
 209          * while avoiding that older tools show confusing messages.
 210          *
 211          * However for pipe sessions we need to keep it zero,
 212          * because script's perf_evsel__check_attr is triggered
 213          * by attr->sample_type != 0, and we can't run it on
 214          * stat sessions.
 215          */
 216         if (!(STAT_RECORD && perf_stat.file.is_pipe))
 217                 attr->sample_type = PERF_SAMPLE_IDENTIFIER;
 218
 219         /*
 220          * Disabling all counters initially, they will be enabled
 221          * either manually by us or by kernel via enable_on_exec
 222          * set later.
 223          */
 224         if (perf_evsel__is_group_leader(evsel)) {
 225                 attr->disabled = 1;
 226
 227                 /*
 228                  * In case of initial_delay we enable tracee
 229                  * events manually.
 230                  */
 231                 if (target__none(&target) && !initial_delay)
 232                         attr->enable_on_exec = 1;
 233         }
 234
 235         if (target__has_cpu(&target))
 236                 return perf_evsel__open_per_cpu(evsel, perf_evsel__cpus(evsel));
 237
 238         return perf_evsel__open_per_thread(evsel, evsel_list->threads);
 239 }
 240
 241 /*
 242  * Does the counter have nsecs as a unit?
 243  */
 244 static inline int nsec_counter(struct perf_evsel *evsel)
 245 {
 246         if (perf_evsel__match(evsel, SOFTWARE, SW_CPU_CLOCK) ||
 247             perf_evsel__match(evsel, SOFTWARE, SW_TASK_CLOCK))
 248                 return 1;
 249
 250         return 0;
 251 }
 252
 253 static int process_synthesized_event(struct perf_tool *tool __maybe_unused,
 254                                      union perf_event *event,
 255                                      struct perf_sample *sample __maybe_unused,
 256                                      struct machine *machine __maybe_unused)
 257 {
 258         if (perf_data_file__write(&perf_stat.file, event, event->header.size) < 0) {
 259                 pr_err("failed to write perf data, error: %m\n");
 260                 return -1;
 261         }
 262
 263         perf_stat.bytes_written += event->header.size;
 264         return 0;
 265 }
 266
 267 static int write_stat_round_event(u64 tm, u64 type)
 268 {
 269         return perf_event__synthesize_stat_round(NULL, tm, type,
 270                                                  process_synthesized_event,
 271                                                  NULL);
 272 }
 273
 274 #define WRITE_STAT_ROUND_EVENT(time, interval) \
 275         write_stat_round_event(time, PERF_STAT_ROUND_TYPE__ ## interval)
 276
 277 #define SID(e, x, y) xyarray__entry(e->sample_id, x, y)
 278
 279 static int
 280 perf_evsel__write_stat_event(struct perf_evsel *counter, u32 cpu, u32 thread,
 281                              struct perf_counts_values *count)
 282 {
 283         struct perf_sample_id *sid = SID(counter, cpu, thread);
 284
 285         return perf_event__synthesize_stat(NULL, cpu, thread, sid->id, count,
 286                                            process_synthesized_event, NULL);
 287 }
 288
 289 /*
 290  * Read out the results of a single counter:
 291  * do not aggregate counts across CPUs in system-wide mode
 292  */
 293 static int read_counter(struct perf_evsel *counter)
 294 {
 295         int nthreads = thread_map__nr(evsel_list->threads);
 296         int ncpus, cpu, thread;
 297
 298         if (target__has_cpu(&target))
 299                 ncpus = perf_evsel__nr_cpus(counter);
 300         else
 301                 ncpus = 1;
 302
 303         if (!counter->supported)
 304                 return -ENOENT;
 305
 306         if (counter->system_wide)
 307                 nthreads = 1;
 308
 309         for (thread = 0; thread < nthreads; thread++) {
 310                 for (cpu = 0; cpu < ncpus; cpu++) {
 311                         struct perf_counts_values *count;
 312
 313                         count = perf_counts(counter->counts, cpu, thread);
 314                         if (perf_evsel__read(counter, cpu, thread, count)) {
 315                                 counter->counts->scaled = -1;
 316                                 perf_counts(counter->counts, cpu, thread)->ena = 0;
 317                                 perf_counts(counter->counts, cpu, thread)->run = 0;
 318                                 return -1;
 319                         }
 320
 321                         if (STAT_RECORD) {
 322                                 if (perf_evsel__write_stat_event(counter, cpu, thread, count)) {
 323                                         pr_err("failed to write stat event\n");
 324                                         return -1;
 325                                 }
 326                         }
 327
 328                         if (verbose > 1) {
 329                                 fprintf(stat_config.output,
 330                                         "%s: %d: %" PRIu64 " %" PRIu64 " %" PRIu64 "\n",
 331                                                 perf_evsel__name(counter),
 332                                                 cpu,
 333                                                 count->val, count->ena, count->run);
 334                         }
 335                 }
 336         }
 337
 338         return 0;
 339 }
 340
 341 static void read_counters(void)
 342 {
 343         struct perf_evsel *counter;
 344         int ret;
 345
 346         evlist__for_each_entry(evsel_list, counter) {
 347                 ret = read_counter(counter);
 348                 if (ret)
 349                         pr_debug("failed to read counter %s\n", counter->name);
 350
 351                 if (ret == 0 && perf_stat_process_counter(&stat_config, counter))
 352                         pr_warning("failed to process counter %s\n", counter->name);
 353         }
 354 }
 355
 356 static void process_interval(void)
 357 {
 358         struct timespec ts, rs;
 359
 360         read_counters();
 361
 362         clock_gettime(CLOCK_MONOTONIC, &ts);
 363         diff_timespec(&rs, &ts, &ref_time);
 364
 365         if (STAT_RECORD) {
 366                 if (WRITE_STAT_ROUND_EVENT(rs.tv_sec * NSEC_PER_SEC + rs.tv_nsec, INTERVAL))
 367                         pr_err("failed to write stat round event\n");
 368         }
 369
 370         print_counters(&rs, 0, NULL);
 371 }
 372
 373 static void enable_counters(void)
 374 {
 375         if (initial_delay)
 376                 usleep(initial_delay * USEC_PER_MSEC);
 377
 378         /*
 379          * We need to enable counters only if:
 380          * - we don't have tracee (attaching to task or cpu)
 381          * - we have initial delay configured
 382          */
 383         if (!target__none(&target) || initial_delay)
 384                 perf_evlist__enable(evsel_list);
 385 }
 386
 387 static void disable_counters(void)
 388 {
 389         /*
 390          * If we don't have tracee (attaching to task or cpu), counters may
 391          * still be running. To get accurate group ratios, we must stop groups
 392          * from counting before reading their constituent counters.
 393          */
 394         if (!target__none(&target))
 395                 perf_evlist__disable(evsel_list);
 396 }
 397
 398 static volatile int workload_exec_errno;
 399
 400 /*
 401  * perf_evlist__prepare_workload will send a SIGUSR1
 402  * if the fork fails, since we asked by setting its
 403  * want_signal to true.
 404  */
 405 static void workload_exec_failed_signal(int signo __maybe_unused, siginfo_t *info,
 406                                         void *ucontext __maybe_unused)
 407 {
 408         workload_exec_errno = info->si_value.sival_int;
 409 }
 410
 411 static bool has_unit(struct perf_evsel *counter)
 412 {
 413         return counter->unit && *counter->unit;
 414 }
 415
 416 static bool has_scale(struct perf_evsel *counter)
 417 {
 418         return counter->scale != 1;
 419 }
 420
 421 static int perf_stat_synthesize_config(bool is_pipe)
 422 {
 423         struct perf_evsel *counter;
 424         int err;
 425
 426         if (is_pipe) {
 427                 err = perf_event__synthesize_attrs(NULL, perf_stat.session,
 428                                                    process_synthesized_event);
 429                 if (err < 0) {
 430                         pr_err("Couldn't synthesize attrs.\n");
 431                         return err;
 432                 }
 433         }
 434
 435         /*
 436          * Synthesize other events stuff not carried within
 437          * attr event - unit, scale, name
 438          */
 439         evlist__for_each_entry(evsel_list, counter) {
 440                 if (!counter->supported)
 441                         continue;
 442
 443                 /*
 444                  * Synthesize unit and scale only if it's defined.
 445                  */
 446                 if (has_unit(counter)) {
 447                         err = perf_event__synthesize_event_update_unit(NULL, counter, process_synthesized_event);
 448                         if (err < 0) {
 449                                 pr_err("Couldn't synthesize evsel unit.\n");
 450                                 return err;
 451                         }
 452                 }
 453
 454                 if (has_scale(counter)) {
 455                         err = perf_event__synthesize_event_update_scale(NULL, counter, process_synthesized_event);
 456                         if (err < 0) {
 457                                 pr_err("Couldn't synthesize evsel scale.\n");
 458                                 return err;
 459                         }
 460                 }
 461
 462                 if (counter->own_cpus) {
 463                         err = perf_event__synthesize_event_update_cpus(NULL, counter, process_synthesized_event);
 464                         if (err < 0) {
 465                                 pr_err("Couldn't synthesize evsel scale.\n");
 466                                 return err;
 467                         }
 468                 }
 469
 470                 /*
 471                  * Name is needed only for pipe output,
 472                  * perf.data carries event names.
 473                  */
 474                 if (is_pipe) {
 475                         err = perf_event__synthesize_event_update_name(NULL, counter, process_synthesized_event);
 476                         if (err < 0) {
 477                                 pr_err("Couldn't synthesize evsel name.\n");
 478                                 return err;
 479                         }
 480                 }
 481         }
 482
 483         err = perf_event__synthesize_thread_map2(NULL, evsel_list->threads,
 484                                                 process_synthesized_event,
 485                                                 NULL);
 486         if (err < 0) {
 487                 pr_err("Couldn't synthesize thread map.\n");
 488                 return err;
 489         }
 490
 491         err = perf_event__synthesize_cpu_map(NULL, evsel_list->cpus,
 492                                              process_synthesized_event, NULL);
 493         if (err < 0) {
 494                 pr_err("Couldn't synthesize thread map.\n");
 495                 return err;
 496         }
 497
 498         err = perf_event__synthesize_stat_config(NULL, &stat_config,
 499                                                  process_synthesized_event, NULL);
 500         if (err < 0) {
 501                 pr_err("Couldn't synthesize config.\n");
 502                 return err;
 503         }
 504
 505         return 0;
 506 }
 507
 508 #define FD(e, x, y) (*(int *)xyarray__entry(e->fd, x, y))
 509
 510 static int __store_counter_ids(struct perf_evsel *counter,
 511                                struct cpu_map *cpus,
 512                                struct thread_map *threads)
 513 {
 514         int cpu, thread;
 515
 516         for (cpu = 0; cpu < cpus->nr; cpu++) {
 517                 for (thread = 0; thread < threads->nr; thread++) {
 518                         int fd = FD(counter, cpu, thread);
 519
 520                         if (perf_evlist__id_add_fd(evsel_list, counter,
 521                                                    cpu, thread, fd) < 0)
 522                                 return -1;
 523                 }
 524         }
 525
 526         return 0;
 527 }
 528
 529 static int store_counter_ids(struct perf_evsel *counter)
 530 {
 531         struct cpu_map *cpus = counter->cpus;
 532         struct thread_map *threads = counter->threads;
 533
 534         if (perf_evsel__alloc_id(counter, cpus->nr, threads->nr))
 535                 return -ENOMEM;
 536
 537         return __store_counter_ids(counter, cpus, threads);
 538 }
 539
 540 static int __run_perf_stat(int argc, const char **argv)
 541 {
 542         int interval = stat_config.interval;
 543         char msg[512];
 544         unsigned long long t0, t1;
 545         struct perf_evsel *counter;
 546         struct timespec ts;
 547         size_t l;
 548         int status = 0;
 549         const bool forks = (argc > 0);
 550         bool is_pipe = STAT_RECORD ? perf_stat.file.is_pipe : false;
 551         struct perf_evsel_config_term *err_term;
 552
 553         if (interval) {
 554                 ts.tv_sec  = interval / USEC_PER_MSEC;
 555                 ts.tv_nsec = (interval % USEC_PER_MSEC) * NSEC_PER_MSEC;
 556         } else {
 557                 ts.tv_sec  = 1;
 558                 ts.tv_nsec = 0;
 559         }
 560
 561         if (forks) {
 562                 if (perf_evlist__prepare_workload(evsel_list, &target, argv, is_pipe,
 563                                                   workload_exec_failed_signal) < 0) {
 564                         perror("failed to prepare workload");
 565                         return -1;
 566                 }
 567                 child_pid = evsel_list->workload.pid;
 568         }
 569
 570         if (group)
 571                 perf_evlist__set_leader(evsel_list);
 572
 573         evlist__for_each_entry(evsel_list, counter) {
 574 try_again:
 575                 if (create_perf_stat_counter(counter) < 0) {
 576                         /*
 577                          * PPC returns ENXIO for HW counters until 2.6.37
 578                          * (behavior changed with commit b0a873e).
 579                          */
 580                         if (errno == EINVAL || errno == ENOSYS ||
 581                             errno == ENOENT || errno == EOPNOTSUPP ||
 582                             errno == ENXIO) {
 583                                 if (verbose)
 584                                         ui__warning("%s event is not supported by the kernel.\n",
 585                                                     perf_evsel__name(counter));
 586                                 counter->supported = false;
 587
 588                                 if ((counter->leader != counter) ||
 589                                     !(counter->leader->nr_members > 1))
 590                                         continue;
 591                         } else if (perf_evsel__fallback(counter, errno, msg, sizeof(msg))) {
 592                                 if (verbose)
 593                                         ui__warning("%s\n", msg);
 594                                 goto try_again;
 595                         }
 596
 597                         perf_evsel__open_strerror(counter, &target,
 598                                                   errno, msg, sizeof(msg));
 599                         ui__error("%s\n", msg);
 600
 601                         if (child_pid != -1)
 602                                 kill(child_pid, SIGTERM);
 603
 604                         return -1;
 605                 }
 606                 counter->supported = true;
 607
 608                 l = strlen(counter->unit);
 609                 if (l > unit_width)
 610                         unit_width = l;
 611
 612                 if (STAT_RECORD && store_counter_ids(counter))
 613                         return -1;
 614         }
 615
 616         if (perf_evlist__apply_filters(evsel_list, &counter)) {
 617                 error("failed to set filter \"%s\" on event %s with %d (%s)\n",
 618                         counter->filter, perf_evsel__name(counter), errno,
 619                         str_error_r(errno, msg, sizeof(msg)));
 620                 return -1;
 621         }
 622
 623         if (perf_evlist__apply_drv_configs(evsel_list, &counter, &err_term)) {
 624                 error("failed to set config \"%s\" on event %s with %d (%s)\n",
 625                       err_term->val.drv_cfg, perf_evsel__name(counter), errno,
 626                       str_error_r(errno, msg, sizeof(msg)));
 627                 return -1;
 628         }
 629
 630         if (STAT_RECORD) {
 631                 int err, fd = perf_data_file__fd(&perf_stat.file);
 632
 633                 if (is_pipe) {
 634                         err = perf_header__write_pipe(perf_data_file__fd(&perf_stat.file));
 635                 } else {
 636                         err = perf_session__write_header(perf_stat.session, evsel_list,
 637                                                          fd, false);
 638                 }
 639
 640                 if (err < 0)
 641                         return err;
 642
 643                 err = perf_stat_synthesize_config(is_pipe);
 644                 if (err < 0)
 645                         return err;
 646         }
 647
 648         /*
 649          * Enable counters and exec the command:
 650          */
 651         t0 = rdclock();
 652         clock_gettime(CLOCK_MONOTONIC, &ref_time);
 653
 654         if (forks) {
 655                 perf_evlist__start_workload(evsel_list);
 656                 enable_counters();
 657
 658                 if (interval) {
 659                         while (!waitpid(child_pid, &status, WNOHANG)) {
 660                                 nanosleep(&ts, NULL);
 661                                 process_interval();
 662                         }
 663                 }
 664                 wait(&status);
 665
 666                 if (workload_exec_errno) {
 667                         const char *emsg = str_error_r(workload_exec_errno, msg, sizeof(msg));
 668                         pr_err("Workload failed: %s\n", emsg);
 669                         return -1;
 670                 }
 671
 672                 if (WIFSIGNALED(status))
 673                         psignal(WTERMSIG(status), argv[0]);
 674         } else {
 675                 enable_counters();
 676                 while (!done) {
 677                         nanosleep(&ts, NULL);
 678                         if (interval)
 679                                 process_interval();
 680                 }
 681         }
 682
 683         disable_counters();
 684
 685         t1 = rdclock();
 686
 687         update_stats(&walltime_nsecs_stats, t1 - t0);
 688
 689         /*
 690          * Closing a group leader splits the group, and as we only disable
 691          * group leaders, results in remaining events becoming enabled. To
 692          * avoid arbitrary skew, we must read all counters before closing any
 693          * group leaders.
 694          */
 695         read_counters();
 696         perf_evlist__close(evsel_list);
 697
 698         return WEXITSTATUS(status);
 699 }
 700
 701 static int run_perf_stat(int argc, const char **argv)
 702 {
 703         int ret;
 704
 705         if (pre_cmd) {
 706                 ret = system(pre_cmd);
 707                 if (ret)
 708                         return ret;
 709         }
 710
 711         if (sync_run)
 712                 sync();
 713
 714         ret = __run_perf_stat(argc, argv);
 715         if (ret)
 716                 return ret;
 717
 718         if (post_cmd) {
 719                 ret = system(post_cmd);
 720                 if (ret)
 721                         return ret;
 722         }
 723
 724         return ret;
 725 }
 726
 727 static void print_running(u64 run, u64 ena)
 728 {
 729         if (csv_output) {
 730                 fprintf(stat_config.output, "%s%" PRIu64 "%s%.2f",
 731                                         csv_sep,
 732                                         run,
 733                                         csv_sep,
 734                                         ena ? 100.0 * run / ena : 100.0);
 735         } else if (run != ena) {
 736                 fprintf(stat_config.output, "  (%.2f%%)", 100.0 * run / ena);
 737         }
 738 }
 739
 740 static void print_noise_pct(double total, double avg)
 741 {
 742         double pct = rel_stddev_stats(total, avg);
 743
 744         if (csv_output)
 745                 fprintf(stat_config.output, "%s%.2f%%", csv_sep, pct);
 746         else if (pct)
 747                 fprintf(stat_config.output, "  ( +-%6.2f%% )", pct);
 748 }
 749
 750 static void print_noise(struct perf_evsel *evsel, double avg)
 751 {
 752         struct perf_stat_evsel *ps;
 753
 754         if (run_count == 1)
 755                 return;
 756
 757         ps = evsel->priv;
 758         print_noise_pct(stddev_stats(&ps->res_stats[0]), avg);
 759 }
 760
 761 static void aggr_printout(struct perf_evsel *evsel, int id, int nr)
 762 {
 763         switch (stat_config.aggr_mode) {
 764         case AGGR_CORE:
 765                 fprintf(stat_config.output, "S%d-C%*d%s%*d%s",
 766                         cpu_map__id_to_socket(id),
 767                         csv_output ? 0 : -8,
 768                         cpu_map__id_to_cpu(id),
 769                         csv_sep,
 770                         csv_output ? 0 : 4,
 771                         nr,
 772                         csv_sep);
 773                 break;
 774         case AGGR_SOCKET:
 775                 fprintf(stat_config.output, "S%*d%s%*d%s",
 776                         csv_output ? 0 : -5,
 777                         id,
 778                         csv_sep,
 779                         csv_output ? 0 : 4,
 780                         nr,
 781                         csv_sep);
 782                         break;
 783         case AGGR_NONE:
 784                 fprintf(stat_config.output, "CPU%*d%s",
 785                         csv_output ? 0 : -4,
 786                         perf_evsel__cpus(evsel)->map[id], csv_sep);
 787                 break;
 788         case AGGR_THREAD:
 789                 fprintf(stat_config.output, "%*s-%*d%s",
 790                         csv_output ? 0 : 16,
 791                         thread_map__comm(evsel->threads, id),
 792                         csv_output ? 0 : -8,
 793                         thread_map__pid(evsel->threads, id),
 794                         csv_sep);
 795                 break;
 796         case AGGR_GLOBAL:
 797         case AGGR_UNSET:
 798         default:
 799                 break;
 800         }
 801 }
 802
 803 struct outstate {
 804         FILE *fh;
 805         bool newline;
 806         const char *prefix;
 807         int  nfields;
 808         int  id, nr;
 809         struct perf_evsel *evsel;
 810 };
 811
 812 #define METRIC_LEN  35
 813
 814 static void new_line_std(void *ctx)
 815 {
 816         struct outstate *os = ctx;
 817
 818         os->newline = true;
 819 }
 820
 821 static void do_new_line_std(struct outstate *os)
 822 {
 823         fputc('\n', os->fh);
 824         fputs(os->prefix, os->fh);
 825         aggr_printout(os->evsel, os->id, os->nr);
 826         if (stat_config.aggr_mode == AGGR_NONE)
 827                 fprintf(os->fh, "        ");
 828         fprintf(os->fh, "                                                 ");
 829 }
 830
 831 static void print_metric_std(void *ctx, const char *color, const char *fmt,
 832                              const char *unit, double val)
 833 {
 834         struct outstate *os = ctx;
 835         FILE *out = os->fh;
 836         int n;
 837         bool newline = os->newline;
 838
 839         os->newline = false;
 840
 841         if (unit == NULL || fmt == NULL) {
 842                 fprintf(out, "%-*s", METRIC_LEN, "");
 843                 return;
 844         }
 845
 846         if (newline)
 847                 do_new_line_std(os);
 848
 849         n = fprintf(out, " # ");
 850         if (color)
 851                 n += color_fprintf(out, color, fmt, val);
 852         else
 853                 n += fprintf(out, fmt, val);
 854         fprintf(out, " %-*s", METRIC_LEN - n - 1, unit);
 855 }
 856
 857 static void new_line_csv(void *ctx)
 858 {
 859         struct outstate *os = ctx;
 860         int i;
 861
 862         fputc('\n', os->fh);
 863         if (os->prefix)
 864                 fprintf(os->fh, "%s%s", os->prefix, csv_sep);
 865         aggr_printout(os->evsel, os->id, os->nr);
 866         for (i = 0; i < os->nfields; i++)
 867                 fputs(csv_sep, os->fh);
 868 }
 869
 870 static void print_metric_csv(void *ctx,
 871                              const char *color __maybe_unused,
 872                              const char *fmt, const char *unit, double val)
 873 {
 874         struct outstate *os = ctx;
 875         FILE *out = os->fh;
 876         char buf[64], *vals, *ends;
 877
 878         if (unit == NULL || fmt == NULL) {
 879                 fprintf(out, "%s%s", csv_sep, csv_sep);
 880                 return;
 881         }
 882         snprintf(buf, sizeof(buf), fmt, val);
 883         vals = buf;
 884         while (isspace(*vals))
 885                 vals++;
 886         ends = vals;
 887         while (isdigit(*ends) || *ends == '.')
 888                 ends++;
 889         *ends = 0;
 890         while (isspace(*unit))
 891                 unit++;
 892         fprintf(out, "%s%s%s%s", csv_sep, vals, csv_sep, unit);
 893 }
 894
 895 #define METRIC_ONLY_LEN 20
 896
 897 /* Filter out some columns that don't work well in metrics only mode */
 898
 899 static bool valid_only_metric(const char *unit)
 900 {
 901         if (!unit)
 902                 return false;
 903         if (strstr(unit, "/sec") ||
 904             strstr(unit, "hz") ||
 905             strstr(unit, "Hz") ||
 906             strstr(unit, "CPUs utilized"))
 907                 return false;
 908         return true;
 909 }
 910
 911 static const char *fixunit(char *buf, struct perf_evsel *evsel,
 912                            const char *unit)
 913 {
 914         if (!strncmp(unit, "of all", 6)) {
 915                 snprintf(buf, 1024, "%s %s", perf_evsel__name(evsel),
 916                          unit);
 917                 return buf;
 918         }
 919         return unit;
 920 }
 921
 922 static void print_metric_only(void *ctx, const char *color, const char *fmt,
 923                               const char *unit, double val)
 924 {
 925         struct outstate *os = ctx;
 926         FILE *out = os->fh;
 927         int n;
 928         char buf[1024];
 929         unsigned mlen = METRIC_ONLY_LEN;
 930
 931         if (!valid_only_metric(unit))
 932                 return;
 933         unit = fixunit(buf, os->evsel, unit);
 934         if (color)
 935                 n = color_fprintf(out, color, fmt, val);
 936         else
 937                 n = fprintf(out, fmt, val);
 938         if (n > METRIC_ONLY_LEN)
 939                 n = METRIC_ONLY_LEN;
 940         if (mlen < strlen(unit))
 941                 mlen = strlen(unit) + 1;
 942         fprintf(out, "%*s", mlen - n, "");
 943 }
 944
 945 static void print_metric_only_csv(void *ctx, const char *color __maybe_unused,
 946                                   const char *fmt,
 947                                   const char *unit, double val)
 948 {
 949         struct outstate *os = ctx;
 950         FILE *out = os->fh;
 951         char buf[64], *vals, *ends;
 952         char tbuf[1024];
 953
 954         if (!valid_only_metric(unit))
 955                 return;
 956         unit = fixunit(tbuf, os->evsel, unit);
 957         snprintf(buf, sizeof buf, fmt, val);
 958         vals = buf;
 959         while (isspace(*vals))
 960                 vals++;
 961         ends = vals;
 962         while (isdigit(*ends) || *ends == '.')
 963                 ends++;
 964         *ends = 0;
 965         fprintf(out, "%s%s", vals, csv_sep);
 966 }
 967
 968 static void new_line_metric(void *ctx __maybe_unused)
 969 {
 970 }
 971
 972 static void print_metric_header(void *ctx, const char *color __maybe_unused,
 973                                 const char *fmt __maybe_unused,
 974                                 const char *unit, double val __maybe_unused)
 975 {
 976         struct outstate *os = ctx;
 977         char tbuf[1024];
 978
 979         if (!valid_only_metric(unit))
 980                 return;
 981         unit = fixunit(tbuf, os->evsel, unit);
 982         if (csv_output)
 983                 fprintf(os->fh, "%s%s", unit, csv_sep);
 984         else
 985                 fprintf(os->fh, "%-*s ", METRIC_ONLY_LEN, unit);
 986 }
 987
 988 static void nsec_printout(int id, int nr, struct perf_evsel *evsel, double avg)
 989 {
 990         FILE *output = stat_config.output;
 991         double msecs = avg / NSEC_PER_MSEC;
 992         const char *fmt_v, *fmt_n;
 993         char name[25];
 994
 995         fmt_v = csv_output ? "%.6f%s" : "%18.6f%s";
 996         fmt_n = csv_output ? "%s" : "%-25s";
 997
 998         aggr_printout(evsel, id, nr);
 999
1000         scnprintf(name, sizeof(name), "%s%s",
1001                   perf_evsel__name(evsel), csv_output ? "" : " (msec)");
1002
1003         fprintf(output, fmt_v, msecs, csv_sep);
1004
1005         if (csv_output)
1006                 fprintf(output, "%s%s", evsel->unit, csv_sep);
1007         else
1008                 fprintf(output, "%-*s%s", unit_width, evsel->unit, csv_sep);
1009
1010         fprintf(output, fmt_n, name);
1011
1012         if (evsel->cgrp)
1013                 fprintf(output, "%s%s", csv_sep, evsel->cgrp->name);
1014 }
1015
1016 static int first_shadow_cpu(struct perf_evsel *evsel, int id)
1017 {
1018         int i;
1019
1020         if (!aggr_get_id)
1021                 return 0;
1022
1023         if (stat_config.aggr_mode == AGGR_NONE)
1024                 return id;
1025
1026         if (stat_config.aggr_mode == AGGR_GLOBAL)
1027                 return 0;
1028
1029         for (i = 0; i < perf_evsel__nr_cpus(evsel); i++) {
1030                 int cpu2 = perf_evsel__cpus(evsel)->map[i];
1031
1032                 if (aggr_get_id(evsel_list->cpus, cpu2) == id)
1033                         return cpu2;
1034         }
1035         return 0;
1036 }
1037
1038 static void abs_printout(int id, int nr, struct perf_evsel *evsel, double avg)
1039 {
1040         FILE *output = stat_config.output;
1041         double sc =  evsel->scale;
1042         const char *fmt;
1043
1044         if (csv_output) {
1045                 fmt = floor(sc) != sc ?  "%.2f%s" : "%.0f%s";
1046         } else {
1047                 if (big_num)
1048                         fmt = floor(sc) != sc ? "%'18.2f%s" : "%'18.0f%s";
1049                 else
1050                         fmt = floor(sc) != sc ? "%18.2f%s" : "%18.0f%s";
1051         }
1052
1053         aggr_printout(evsel, id, nr);
1054
1055         fprintf(output, fmt, avg, csv_sep);
1056
1057         if (evsel->unit)
1058                 fprintf(output, "%-*s%s",
1059                         csv_output ? 0 : unit_width,
1060                         evsel->unit, csv_sep);
1061
1062         fprintf(output, "%-*s", csv_output ? 0 : 25, perf_evsel__name(evsel));
1063
1064         if (evsel->cgrp)
1065                 fprintf(output, "%s%s", csv_sep, evsel->cgrp->name);
1066 }
1067
1068 static void printout(int id, int nr, struct perf_evsel *counter, double uval,
1069                      char *prefix, u64 run, u64 ena, double noise)
1070 {
1071         struct perf_stat_output_ctx out;
1072         struct outstate os = {
1073                 .fh = stat_config.output,
1074                 .prefix = prefix ? prefix : "",
1075                 .id = id,
1076                 .nr = nr,
1077                 .evsel = counter,
1078         };
1079         print_metric_t pm = print_metric_std;
1080         void (*nl)(void *);
1081
1082         if (metric_only) {
1083                 nl = new_line_metric;
1084                 if (csv_output)
1085                         pm = print_metric_only_csv;
1086                 else
1087                         pm = print_metric_only;
1088         } else
1089                 nl = new_line_std;
1090
1091         if (csv_output && !metric_only) {
1092                 static int aggr_fields[] = {
1093                         [AGGR_GLOBAL] = 0,
1094                         [AGGR_THREAD] = 1,
1095                         [AGGR_NONE] = 1,
1096                         [AGGR_SOCKET] = 2,
1097                         [AGGR_CORE] = 2,
1098                 };
1099
1100                 pm = print_metric_csv;
1101                 nl = new_line_csv;
1102                 os.nfields = 3;
1103                 os.nfields += aggr_fields[stat_config.aggr_mode];
1104                 if (counter->cgrp)
1105                         os.nfields++;
1106         }
1107         if (run == 0 || ena == 0 || counter->counts->scaled == -1) {
1108                 if (metric_only) {
1109                         pm(&os, NULL, "", "", 0);
1110                         return;
1111                 }
1112                 aggr_printout(counter, id, nr);
1113
1114                 fprintf(stat_config.output, "%*s%s",
1115                         csv_output ? 0 : 18,
1116                         counter->supported ? CNTR_NOT_COUNTED : CNTR_NOT_SUPPORTED,
1117                         csv_sep);
1118
1119                 if (counter->supported)
1120                         print_free_counters_hint = 1;
1121
1122                 fprintf(stat_config.output, "%-*s%s",
1123                         csv_output ? 0 : unit_width,
1124                         counter->unit, csv_sep);
1125
1126                 fprintf(stat_config.output, "%*s",
1127                         csv_output ? 0 : -25,
1128                         perf_evsel__name(counter));
1129
1130                 if (counter->cgrp)
1131                         fprintf(stat_config.output, "%s%s",
1132                                 csv_sep, counter->cgrp->name);
1133
1134                 if (!csv_output)
1135                         pm(&os, NULL, NULL, "", 0);
1136                 print_noise(counter, noise);
1137                 print_running(run, ena);
1138                 if (csv_output)
1139                         pm(&os, NULL, NULL, "", 0);
1140                 return;
1141         }
1142
1143         if (metric_only)
1144                 /* nothing */;
1145         else if (nsec_counter(counter))
1146                 nsec_printout(id, nr, counter, uval);
1147         else
1148                 abs_printout(id, nr, counter, uval);
1149
1150         out.print_metric = pm;
1151         out.new_line = nl;
1152         out.ctx = &os;
1153
1154         if (csv_output && !metric_only) {
1155                 print_noise(counter, noise);
1156                 print_running(run, ena);
1157         }
1158
1159         perf_stat__print_shadow_stats(counter, uval,
1160                                 first_shadow_cpu(counter, id),
1161                                 &out);
1162         if (!csv_output && !metric_only) {
1163                 print_noise(counter, noise);
1164                 print_running(run, ena);
1165         }
1166 }
1167
1168 static void aggr_update_shadow(void)
1169 {
1170         int cpu, s2, id, s;
1171         u64 val;
1172         struct perf_evsel *counter;
1173
1174         for (s = 0; s < aggr_map->nr; s++) {
1175                 id = aggr_map->map[s];
1176                 evlist__for_each_entry(evsel_list, counter) {
1177                         val = 0;
1178                         for (cpu = 0; cpu < perf_evsel__nr_cpus(counter); cpu++) {
1179                                 s2 = aggr_get_id(evsel_list->cpus, cpu);
1180                                 if (s2 != id)
1181                                         continue;
1182                                 val += perf_counts(counter->counts, cpu, 0)->val;
1183                         }
1184                         val = val * counter->scale;
1185                         perf_stat__update_shadow_stats(counter, &val,
1186                                                        first_shadow_cpu(counter, id));
1187                 }
1188         }
1189 }
1190
1191 static void print_aggr(char *prefix)
1192 {
1193         FILE *output = stat_config.output;
1194         struct perf_evsel *counter;
1195         int cpu, s, s2, id, nr;
1196         double uval;
1197         u64 ena, run, val;
1198         bool first;
1199
1200         if (!(aggr_map || aggr_get_id))
1201                 return;
1202
1203         aggr_update_shadow();
1204
1205         /*
1206          * With metric_only everything is on a single line.
1207          * Without each counter has its own line.
1208          */
1209         for (s = 0; s < aggr_map->nr; s++) {
1210                 if (prefix && metric_only)
1211                         fprintf(output, "%s", prefix);
1212
1213                 id = aggr_map->map[s];
1214                 first = true;
1215                 evlist__for_each_entry(evsel_list, counter) {
1216                         val = ena = run = 0;
1217                         nr = 0;
1218                         for (cpu = 0; cpu < perf_evsel__nr_cpus(counter); cpu++) {
1219                                 s2 = aggr_get_id(perf_evsel__cpus(counter), cpu);
1220                                 if (s2 != id)
1221                                         continue;
1222                                 val += perf_counts(counter->counts, cpu, 0)->val;
1223                                 ena += perf_counts(counter->counts, cpu, 0)->ena;
1224                                 run += perf_counts(counter->counts, cpu, 0)->run;
1225                                 nr++;
1226                         }
1227                         if (first && metric_only) {
1228                                 first = false;
1229                                 aggr_printout(counter, id, nr);
1230                         }
1231                         if (prefix && !metric_only)
1232                                 fprintf(output, "%s", prefix);
1233
1234                         uval = val * counter->scale;
1235                         printout(id, nr, counter, uval, prefix, run, ena, 1.0);
1236                         if (!metric_only)
1237                                 fputc('\n', output);
1238                 }
1239                 if (metric_only)
1240                         fputc('\n', output);
1241         }
1242 }
1243
1244 static void print_aggr_thread(struct perf_evsel *counter, char *prefix)
1245 {
1246         FILE *output = stat_config.output;
1247         int nthreads = thread_map__nr(counter->threads);
1248         int ncpus = cpu_map__nr(counter->cpus);
1249         int cpu, thread;
1250         double uval;
1251
1252         for (thread = 0; thread < nthreads; thread++) {
1253                 u64 ena = 0, run = 0, val = 0;
1254
1255                 for (cpu = 0; cpu < ncpus; cpu++) {
1256                         val += perf_counts(counter->counts, cpu, thread)->val;
1257                         ena += perf_counts(counter->counts, cpu, thread)->ena;
1258                         run += perf_counts(counter->counts, cpu, thread)->run;
1259                 }
1260
1261                 if (prefix)
1262                         fprintf(output, "%s", prefix);
1263
1264                 uval = val * counter->scale;
1265                 printout(thread, 0, counter, uval, prefix, run, ena, 1.0);
1266                 fputc('\n', output);
1267         }
1268 }
1269
1270 /*
1271  * Print out the results of a single counter:
1272  * aggregated counts in system-wide mode
1273  */
1274 static void print_counter_aggr(struct perf_evsel *counter, char *prefix)
1275 {
1276         FILE *output = stat_config.output;
1277         struct perf_stat_evsel *ps = counter->priv;
1278         double avg = avg_stats(&ps->res_stats[0]);
1279         double uval;
1280         double avg_enabled, avg_running;
1281
1282         avg_enabled = avg_stats(&ps->res_stats[1]);
1283         avg_running = avg_stats(&ps->res_stats[2]);
1284
1285         if (prefix && !metric_only)
1286                 fprintf(output, "%s", prefix);
1287
1288         uval = avg * counter->scale;
1289         printout(-1, 0, counter, uval, prefix, avg_running, avg_enabled, avg);
1290         if (!metric_only)
1291                 fprintf(output, "\n");
1292 }
1293
1294 /*
1295  * Print out the results of a single counter:
1296  * does not use aggregated count in system-wide
1297  */
1298 static void print_counter(struct perf_evsel *counter, char *prefix)
1299 {
1300         FILE *output = stat_config.output;
1301         u64 ena, run, val;
1302         double uval;
1303         int cpu;
1304
1305         for (cpu = 0; cpu < perf_evsel__nr_cpus(counter); cpu++) {
1306                 val = perf_counts(counter->counts, cpu, 0)->val;
1307                 ena = perf_counts(counter->counts, cpu, 0)->ena;
1308                 run = perf_counts(counter->counts, cpu, 0)->run;
1309
1310                 if (prefix)
1311                         fprintf(output, "%s", prefix);
1312
1313                 uval = val * counter->scale;
1314                 printout(cpu, 0, counter, uval, prefix, run, ena, 1.0);
1315
1316                 fputc('\n', output);
1317         }
1318 }
1319
1320 static void print_no_aggr_metric(char *prefix)
1321 {
1322         int cpu;
1323         int nrcpus = 0;
1324         struct perf_evsel *counter;
1325         u64 ena, run, val;
1326         double uval;
1327
1328         nrcpus = evsel_list->cpus->nr;
1329         for (cpu = 0; cpu < nrcpus; cpu++) {
1330                 bool first = true;
1331
1332                 if (prefix)
1333                         fputs(prefix, stat_config.output);
1334                 evlist__for_each_entry(evsel_list, counter) {
1335                         if (first) {
1336                                 aggr_printout(counter, cpu, 0);
1337                                 first = false;
1338                         }
1339                         val = perf_counts(counter->counts, cpu, 0)->val;
1340                         ena = perf_counts(counter->counts, cpu, 0)->ena;
1341                         run = perf_counts(counter->counts, cpu, 0)->run;
1342
1343                         uval = val * counter->scale;
1344                         printout(cpu, 0, counter, uval, prefix, run, ena, 1.0);
1345                 }
1346                 fputc('\n', stat_config.output);
1347         }
1348 }
1349
1350 static int aggr_header_lens[] = {
1351         [AGGR_CORE] = 18,
1352         [AGGR_SOCKET] = 12,
1353         [AGGR_NONE] = 6,
1354         [AGGR_THREAD] = 24,
1355         [AGGR_GLOBAL] = 0,
1356 };
1357
1358 static const char *aggr_header_csv[] = {
1359         [AGGR_CORE]     =       "core,cpus,",
1360         [AGGR_SOCKET]   =       "socket,cpus",
1361         [AGGR_NONE]     =       "cpu,",
1362         [AGGR_THREAD]   =       "comm-pid,",
1363         [AGGR_GLOBAL]   =       ""
1364 };
1365
1366 static void print_metric_headers(const char *prefix, bool no_indent)
1367 {
1368         struct perf_stat_output_ctx out;
1369         struct perf_evsel *counter;
1370         struct outstate os = {
1371                 .fh = stat_config.output
1372         };
1373
1374         if (prefix)
1375                 fprintf(stat_config.output, "%s", prefix);
1376
1377         if (!csv_output && !no_indent)
1378                 fprintf(stat_config.output, "%*s",
1379                         aggr_header_lens[stat_config.aggr_mode], "");
1380         if (csv_output) {
1381                 if (stat_config.interval)
1382                         fputs("time,", stat_config.output);
1383                 fputs(aggr_header_csv[stat_config.aggr_mode],
1384                         stat_config.output);
1385         }
1386
1387         /* Print metrics headers only */
1388         evlist__for_each_entry(evsel_list, counter) {
1389                 os.evsel = counter;
1390                 out.ctx = &os;
1391                 out.print_metric = print_metric_header;
1392                 out.new_line = new_line_metric;
1393                 os.evsel = counter;
1394                 perf_stat__print_shadow_stats(counter, 0,
1395                                               0,
1396                                               &out);
1397         }
1398         fputc('\n', stat_config.output);
1399 }
1400
1401 static void print_interval(char *prefix, struct timespec *ts)
1402 {
1403         FILE *output = stat_config.output;
1404         static int num_print_interval;
1405
1406         sprintf(prefix, "%6lu.%09lu%s", ts->tv_sec, ts->tv_nsec, csv_sep);
1407
1408         if (num_print_interval == 0 && !csv_output) {
1409                 switch (stat_config.aggr_mode) {
1410                 case AGGR_SOCKET:
1411                         fprintf(output, "#           time socket cpus");
1412                         if (!metric_only)
1413                                 fprintf(output, "             counts %*s events\n", unit_width, "unit");
1414                         break;
1415                 case AGGR_CORE:
1416                         fprintf(output, "#           time core         cpus");
1417                         if (!metric_only)
1418                                 fprintf(output, "             counts %*s events\n", unit_width, "unit");
1419                         break;
1420                 case AGGR_NONE:
1421                         fprintf(output, "#           time CPU");
1422                         if (!metric_only)
1423                                 fprintf(output, "                counts %*s events\n", unit_width, "unit");
1424                         break;
1425                 case AGGR_THREAD:
1426                         fprintf(output, "#           time             comm-pid");
1427                         if (!metric_only)
1428                                 fprintf(output, "                  counts %*s events\n", unit_width, "unit");
1429                         break;
1430                 case AGGR_GLOBAL:
1431                 default:
1432                         fprintf(output, "#           time");
1433                         if (!metric_only)
1434                                 fprintf(output, "             counts %*s events\n", unit_width, "unit");
1435                 case AGGR_UNSET:
1436                         break;
1437                 }
1438         }
1439
1440         if (num_print_interval == 0 && metric_only)
1441                 print_metric_headers(" ", true);
1442         if (++num_print_interval == 25)
1443                 num_print_interval = 0;
1444 }
1445
1446 static void print_header(int argc, const char **argv)
1447 {
1448         FILE *output = stat_config.output;
1449         int i;
1450
1451         fflush(stdout);
1452
1453         if (!csv_output) {
1454                 fprintf(output, "\n");
1455                 fprintf(output, " Performance counter stats for ");
1456                 if (target.system_wide)
1457                         fprintf(output, "\'system wide");
1458                 else if (target.cpu_list)
1459                         fprintf(output, "\'CPU(s) %s", target.cpu_list);
1460                 else if (!target__has_task(&target)) {
1461                         fprintf(output, "\'%s", argv ? argv[0] : "pipe");
1462                         for (i = 1; argv && (i < argc); i++)
1463                                 fprintf(output, " %s", argv[i]);
1464                 } else if (target.pid)
1465                         fprintf(output, "process id \'%s", target.pid);
1466                 else
1467                         fprintf(output, "thread id \'%s", target.tid);
1468
1469                 fprintf(output, "\'");
1470                 if (run_count > 1)
1471                         fprintf(output, " (%d runs)", run_count);
1472                 fprintf(output, ":\n\n");
1473         }
1474 }
1475
1476 static void print_footer(void)
1477 {
1478         FILE *output = stat_config.output;
1479
1480         if (!null_run)
1481                 fprintf(output, "\n");
1482         fprintf(output, " %17.9f seconds time elapsed",
1483                         avg_stats(&walltime_nsecs_stats) / NSEC_PER_SEC);
1484         if (run_count > 1) {
1485                 fprintf(output, "                                        ");
1486                 print_noise_pct(stddev_stats(&walltime_nsecs_stats),
1487                                 avg_stats(&walltime_nsecs_stats));
1488         }
1489         fprintf(output, "\n\n");
1490
1491         if (print_free_counters_hint)
1492                 fprintf(output,
1493 "Some events weren't counted. Try disabling the NMI watchdog:\n"
1494 "       echo 0 > /proc/sys/kernel/nmi_watchdog\n"
1495 "       perf stat ...\n"
1496 "       echo 1 > /proc/sys/kernel/nmi_watchdog\n");
1497 }
1498
1499 static void print_counters(struct timespec *ts, int argc, const char **argv)
1500 {
1501         int interval = stat_config.interval;
1502         struct perf_evsel *counter;
1503         char buf[64], *prefix = NULL;
1504
1505         /* Do not print anything if we record to the pipe. */
1506         if (STAT_RECORD && perf_stat.file.is_pipe)
1507                 return;
1508
1509         if (interval)
1510                 print_interval(prefix = buf, ts);
1511         else
1512                 print_header(argc, argv);
1513
1514         if (metric_only) {
1515                 static int num_print_iv;
1516
1517                 if (num_print_iv == 0 && !interval)
1518                         print_metric_headers(prefix, false);
1519                 if (num_print_iv++ == 25)
1520                         num_print_iv = 0;
1521                 if (stat_config.aggr_mode == AGGR_GLOBAL && prefix)
1522                         fprintf(stat_config.output, "%s", prefix);
1523         }
1524
1525         switch (stat_config.aggr_mode) {
1526         case AGGR_CORE:
1527         case AGGR_SOCKET:
1528                 print_aggr(prefix);
1529                 break;
1530         case AGGR_THREAD:
1531                 evlist__for_each_entry(evsel_list, counter)
1532                         print_aggr_thread(counter, prefix);
1533                 break;
1534         case AGGR_GLOBAL:
1535                 evlist__for_each_entry(evsel_list, counter)
1536                         print_counter_aggr(counter, prefix);
1537                 if (metric_only)
1538                         fputc('\n', stat_config.output);
1539                 break;
1540         case AGGR_NONE:
1541                 if (metric_only)
1542                         print_no_aggr_metric(prefix);
1543                 else {
1544                         evlist__for_each_entry(evsel_list, counter)
1545                                 print_counter(counter, prefix);
1546                 }
1547                 break;
1548         case AGGR_UNSET:
1549         default:
1550                 break;
1551         }
1552
1553         if (!interval && !csv_output)
1554                 print_footer();
1555
1556         fflush(stat_config.output);
1557 }
1558
1559 static volatile int signr = -1;
1560
1561 static void skip_signal(int signo)
1562 {
1563         if ((child_pid == -1) || stat_config.interval)
1564                 done = 1;
1565
1566         signr = signo;
1567         /*
1568          * render child_pid harmless
1569          * won't send SIGTERM to a random
1570          * process in case of race condition
1571          * and fast PID recycling
1572          */
1573         child_pid = -1;
1574 }
1575
1576 static void sig_atexit(void)
1577 {
1578         sigset_t set, oset;
1579
1580         /*
1581          * avoid race condition with SIGCHLD handler
1582          * in skip_signal() which is modifying child_pid
1583          * goal is to avoid send SIGTERM to a random
1584          * process
1585          */
1586         sigemptyset(&set);
1587         sigaddset(&set, SIGCHLD);
1588         sigprocmask(SIG_BLOCK, &set, &oset);
1589
1590         if (child_pid != -1)
1591                 kill(child_pid, SIGTERM);
1592
1593         sigprocmask(SIG_SETMASK, &oset, NULL);
1594
1595         if (signr == -1)
1596                 return;
1597
1598         signal(signr, SIG_DFL);
1599         kill(getpid(), signr);
1600 }
1601
1602 static int stat__set_big_num(const struct option *opt __maybe_unused,
1603                              const char *s __maybe_unused, int unset)
1604 {
1605         big_num_opt = unset ? 0 : 1;
1606         return 0;
1607 }
1608
1609 static int enable_metric_only(const struct option *opt __maybe_unused,
1610                               const char *s __maybe_unused, int unset)
1611 {
1612         force_metric_only = true;
1613         metric_only = !unset;
1614         return 0;
1615 }
1616
1617 static const struct option stat_options[] = {
1618         OPT_BOOLEAN('T', "transaction", &transaction_run,
1619                     "hardware transaction statistics"),
1620         OPT_CALLBACK('e', "event", &evsel_list, "event",
1621                      "event selector. use 'perf list' to list available events",
1622                      parse_events_option),
1623         OPT_CALLBACK(0, "filter", &evsel_list, "filter",
1624                      "event filter", parse_filter),
1625         OPT_BOOLEAN('i', "no-inherit", &no_inherit,
1626                     "child tasks do not inherit counters"),
1627         OPT_STRING('p', "pid", &target.pid, "pid",
1628                    "stat events on existing process id"),
1629         OPT_STRING('t', "tid", &target.tid, "tid",
1630                    "stat events on existing thread id"),
1631         OPT_BOOLEAN('a', "all-cpus", &target.system_wide,
1632                     "system-wide collection from all CPUs"),
1633         OPT_BOOLEAN('g', "group", &group,
1634                     "put the counters into a counter group"),
1635         OPT_BOOLEAN('c', "scale", &stat_config.scale, "scale/normalize counters"),
1636         OPT_INCR('v', "verbose", &verbose,
1637                     "be more verbose (show counter open errors, etc)"),
1638         OPT_INTEGER('r', "repeat", &run_count,
1639                     "repeat command and print average + stddev (max: 100, forever: 0)"),
1640         OPT_BOOLEAN('n', "null", &null_run,
1641                     "null run - dont start any counters"),
1642         OPT_INCR('d', "detailed", &detailed_run,
1643                     "detailed run - start a lot of events"),
1644         OPT_BOOLEAN('S', "sync", &sync_run,
1645                     "call sync() before starting a run"),
1646         OPT_CALLBACK_NOOPT('B', "big-num", NULL, NULL,
1647                            "print large numbers with thousands\' separators",
1648                            stat__set_big_num),
1649         OPT_STRING('C', "cpu", &target.cpu_list, "cpu",
1650                     "list of cpus to monitor in system-wide"),
1651         OPT_SET_UINT('A', "no-aggr", &stat_config.aggr_mode,
1652                     "disable CPU count aggregation", AGGR_NONE),
1653         OPT_STRING('x', "field-separator", &csv_sep, "separator",
1654                    "print counts with custom separator"),
1655         OPT_CALLBACK('G', "cgroup", &evsel_list, "name",
1656                      "monitor event in cgroup name only", parse_cgroups),
1657         OPT_STRING('o', "output", &output_name, "file", "output file name"),
1658         OPT_BOOLEAN(0, "append", &append_file, "append to the output file"),
1659         OPT_INTEGER(0, "log-fd", &output_fd,
1660                     "log output to fd, instead of stderr"),
1661         OPT_STRING(0, "pre", &pre_cmd, "command",
1662                         "command to run prior to the measured command"),
1663         OPT_STRING(0, "post", &post_cmd, "command",
1664                         "command to run after to the measured command"),
1665         OPT_UINTEGER('I', "interval-print", &stat_config.interval,
1666                     "print counts at regular interval in ms (>= 10)"),
1667         OPT_SET_UINT(0, "per-socket", &stat_config.aggr_mode,
1668                      "aggregate counts per processor socket", AGGR_SOCKET),
1669         OPT_SET_UINT(0, "per-core", &stat_config.aggr_mode,
1670                      "aggregate counts per physical processor core", AGGR_CORE),
1671         OPT_SET_UINT(0, "per-thread", &stat_config.aggr_mode,
1672                      "aggregate counts per thread", AGGR_THREAD),
1673         OPT_UINTEGER('D', "delay", &initial_delay,
1674                      "ms to wait before starting measurement after program start"),
1675         OPT_CALLBACK_NOOPT(0, "metric-only", &metric_only, NULL,
1676                         "Only print computed metrics. No raw values", enable_metric_only),
1677         OPT_BOOLEAN(0, "topdown", &topdown_run,
1678                         "measure topdown level 1 statistics"),
1679         OPT_END()
1680 };
1681
1682 static int perf_stat__get_socket(struct cpu_map *map, int cpu)
1683 {
1684         return cpu_map__get_socket(map, cpu, NULL);
1685 }
1686
1687 static int perf_stat__get_core(struct cpu_map *map, int cpu)
1688 {
1689         return cpu_map__get_core(map, cpu, NULL);
1690 }
1691
1692 static int cpu_map__get_max(struct cpu_map *map)
1693 {
1694         int i, max = -1;
1695
1696         for (i = 0; i < map->nr; i++) {
1697                 if (map->map[i] > max)
1698                         max = map->map[i];
1699         }
1700
1701         return max;
1702 }
1703
1704 static struct cpu_map *cpus_aggr_map;
1705
1706 static int perf_stat__get_aggr(aggr_get_id_t get_id, struct cpu_map *map, int idx)
1707 {
1708         int cpu;
1709
1710         if (idx >= map->nr)
1711                 return -1;
1712
1713         cpu = map->map[idx];
1714
1715         if (cpus_aggr_map->map[cpu] == -1)
1716                 cpus_aggr_map->map[cpu] = get_id(map, idx);
1717
1718         return cpus_aggr_map->map[cpu];
1719 }
1720
1721 static int perf_stat__get_socket_cached(struct cpu_map *map, int idx)
1722 {
1723         return perf_stat__get_aggr(perf_stat__get_socket, map, idx);
1724 }
1725
1726 static int perf_stat__get_core_cached(struct cpu_map *map, int idx)
1727 {
1728         return perf_stat__get_aggr(perf_stat__get_core, map, idx);
1729 }
1730
1731 static int perf_stat_init_aggr_mode(void)
1732 {
1733         int nr;
1734
1735         switch (stat_config.aggr_mode) {
1736         case AGGR_SOCKET:
1737                 if (cpu_map__build_socket_map(evsel_list->cpus, &aggr_map)) {
1738                         perror("cannot build socket map");
1739                         return -1;
1740                 }
1741                 aggr_get_id = perf_stat__get_socket_cached;
1742                 break;
1743         case AGGR_CORE:
1744                 if (cpu_map__build_core_map(evsel_list->cpus, &aggr_map)) {
1745                         perror("cannot build core map");
1746                         return -1;
1747                 }
1748                 aggr_get_id = perf_stat__get_core_cached;
1749                 break;
1750         case AGGR_NONE:
1751         case AGGR_GLOBAL:
1752         case AGGR_THREAD:
1753         case AGGR_UNSET:
1754         default:
1755                 break;
1756         }
1757
1758         /*
1759          * The evsel_list->cpus is the base we operate on,
1760          * taking the highest cpu number to be the size of
1761          * the aggregation translate cpumap.
1762          */
1763         nr = cpu_map__get_max(evsel_list->cpus);
1764         cpus_aggr_map = cpu_map__empty_new(nr + 1);
1765         return cpus_aggr_map ? 0 : -ENOMEM;
1766 }
1767
1768 static void perf_stat__exit_aggr_mode(void)
1769 {
1770         cpu_map__put(aggr_map);
1771         cpu_map__put(cpus_aggr_map);
1772         aggr_map = NULL;
1773         cpus_aggr_map = NULL;
1774 }
1775
1776 static inline int perf_env__get_cpu(struct perf_env *env, struct cpu_map *map, int idx)
1777 {
1778         int cpu;
1779
1780         if (idx > map->nr)
1781                 return -1;
1782
1783         cpu = map->map[idx];
1784
1785         if (cpu >= env->nr_cpus_online)
1786                 return -1;
1787
1788         return cpu;
1789 }
1790
1791 static int perf_env__get_socket(struct cpu_map *map, int idx, void *data)
1792 {
1793         struct perf_env *env = data;
1794         int cpu = perf_env__get_cpu(env, map, idx);
1795
1796         return cpu == -1 ? -1 : env->cpu[cpu].socket_id;
1797 }
1798
1799 static int perf_env__get_core(struct cpu_map *map, int idx, void *data)
1800 {
1801         struct perf_env *env = data;
1802         int core = -1, cpu = perf_env__get_cpu(env, map, idx);
1803
1804         if (cpu != -1) {
1805                 int socket_id = env->cpu[cpu].socket_id;
1806
1807                 /*
1808                  * Encode socket in upper 16 bits
1809                  * core_id is relative to socket, and
1810                  * we need a global id. So we combine
1811                  * socket + core id.
1812                  */
1813                 core = (socket_id << 16) | (env->cpu[cpu].core_id & 0xffff);
1814         }
1815
1816         return core;
1817 }
1818
1819 static int perf_env__build_socket_map(struct perf_env *env, struct cpu_map *cpus,
1820                                       struct cpu_map **sockp)
1821 {
1822         return cpu_map__build_map(cpus, sockp, perf_env__get_socket, env);
1823 }
1824
1825 static int perf_env__build_core_map(struct perf_env *env, struct cpu_map *cpus,
1826                                     struct cpu_map **corep)
1827 {
1828         return cpu_map__build_map(cpus, corep, perf_env__get_core, env);
1829 }
1830
1831 static int perf_stat__get_socket_file(struct cpu_map *map, int idx)
1832 {
1833         return perf_env__get_socket(map, idx, &perf_stat.session->header.env);
1834 }
1835
1836 static int perf_stat__get_core_file(struct cpu_map *map, int idx)
1837 {
1838         return perf_env__get_core(map, idx, &perf_stat.session->header.env);
1839 }
1840
1841 static int perf_stat_init_aggr_mode_file(struct perf_stat *st)
1842 {
1843         struct perf_env *env = &st->session->header.env;
1844
1845         switch (stat_config.aggr_mode) {
1846         case AGGR_SOCKET:
1847                 if (perf_env__build_socket_map(env, evsel_list->cpus, &aggr_map)) {
1848                         perror("cannot build socket map");
1849                         return -1;
1850                 }
1851                 aggr_get_id = perf_stat__get_socket_file;
1852                 break;
1853         case AGGR_CORE:
1854                 if (perf_env__build_core_map(env, evsel_list->cpus, &aggr_map)) {
1855                         perror("cannot build core map");
1856                         return -1;
1857                 }
1858                 aggr_get_id = perf_stat__get_core_file;
1859                 break;
1860         case AGGR_NONE:
1861         case AGGR_GLOBAL:
1862         case AGGR_THREAD:
1863         case AGGR_UNSET:
1864         default:
1865                 break;
1866         }
1867
1868         return 0;
1869 }
1870
1871 static int topdown_filter_events(const char **attr, char **str, bool use_group)
1872 {
1873         int off = 0;
1874         int i;
1875         int len = 0;
1876         char *s;
1877
1878         for (i = 0; attr[i]; i++) {
1879                 if (pmu_have_event("cpu", attr[i])) {
1880                         len += strlen(attr[i]) + 1;
1881                         attr[i - off] = attr[i];
1882                 } else
1883                         off++;
1884         }
1885         attr[i - off] = NULL;
1886
1887         *str = malloc(len + 1 + 2);
1888         if (!*str)
1889                 return -1;
1890         s = *str;
1891         if (i - off == 0) {
1892                 *s = 0;
1893                 return 0;
1894         }
1895         if (use_group)
1896                 *s++ = '{';
1897         for (i = 0; attr[i]; i++) {
1898                 strcpy(s, attr[i]);
1899                 s += strlen(s);
1900                 *s++ = ',';
1901         }
1902         if (use_group) {
1903                 s[-1] = '}';
1904                 *s = 0;
1905         } else
1906                 s[-1] = 0;
1907         return 0;
1908 }
1909
1910 __weak bool arch_topdown_check_group(bool *warn)
1911 {
1912         *warn = false;
1913         return false;
1914 }
1915
1916 __weak void arch_topdown_group_warn(void)
1917 {
1918 }
1919
1920 /*
1921  * Add default attributes, if there were no attributes specified or
1922  * if -d/--detailed, -d -d or -d -d -d is used:
1923  */
1924 static int add_default_attributes(void)
1925 {
1926         int err;
1927         struct perf_event_attr default_attrs0[] = {
1928
1929   { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_TASK_CLOCK              },
1930   { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_CONTEXT_SWITCHES        },
1931   { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_CPU_MIGRATIONS          },
1932   { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_PAGE_FAULTS             },
1933
1934   { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_CPU_CYCLES              },
1935 };
1936         struct perf_event_attr frontend_attrs[] = {
1937   { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_STALLED_CYCLES_FRONTEND },
1938 };
1939         struct perf_event_attr backend_attrs[] = {
1940   { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_STALLED_CYCLES_BACKEND  },
1941 };
1942         struct perf_event_attr default_attrs1[] = {
1943   { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_INSTRUCTIONS            },
1944   { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_BRANCH_INSTRUCTIONS     },
1945   { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_BRANCH_MISSES           },
1946
1947 };
1948
1949 /*
1950  * Detailed stats (-d), covering the L1 and last level data caches:
1951  */
1952         struct perf_event_attr detailed_attrs[] = {
1953
1954   { .type = PERF_TYPE_HW_CACHE,
1955     .config =
1956          PERF_COUNT_HW_CACHE_L1D                <<  0  |
1957         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
1958         (PERF_COUNT_HW_CACHE_RESULT_ACCESS      << 16)                          },
1959
1960   { .type = PERF_TYPE_HW_CACHE,
1961     .config =
1962          PERF_COUNT_HW_CACHE_L1D                <<  0  |
1963         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
1964         (PERF_COUNT_HW_CACHE_RESULT_MISS        << 16)                          },
1965
1966   { .type = PERF_TYPE_HW_CACHE,
1967     .config =
1968          PERF_COUNT_HW_CACHE_LL                 <<  0  |
1969         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
1970         (PERF_COUNT_HW_CACHE_RESULT_ACCESS      << 16)                          },
1971
1972   { .type = PERF_TYPE_HW_CACHE,
1973     .config =
1974          PERF_COUNT_HW_CACHE_LL                 <<  0  |
1975         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
1976         (PERF_COUNT_HW_CACHE_RESULT_MISS        << 16)                          },
1977 };
1978
1979 /*
1980  * Very detailed stats (-d -d), covering the instruction cache and the TLB caches:
1981  */
1982         struct perf_event_attr very_detailed_attrs[] = {
1983
1984   { .type = PERF_TYPE_HW_CACHE,
1985     .config =
1986          PERF_COUNT_HW_CACHE_L1I                <<  0  |
1987         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
1988         (PERF_COUNT_HW_CACHE_RESULT_ACCESS      << 16)                          },
1989
1990   { .type = PERF_TYPE_HW_CACHE,
1991     .config =
1992          PERF_COUNT_HW_CACHE_L1I                <<  0  |
1993         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
1994         (PERF_COUNT_HW_CACHE_RESULT_MISS        << 16)                          },
1995
1996   { .type = PERF_TYPE_HW_CACHE,
1997     .config =
1998          PERF_COUNT_HW_CACHE_DTLB               <<  0  |
1999         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
2000         (PERF_COUNT_HW_CACHE_RESULT_ACCESS      << 16)                          },
2001
2002   { .type = PERF_TYPE_HW_CACHE,
2003     .config =
2004          PERF_COUNT_HW_CACHE_DTLB               <<  0  |
2005         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
2006         (PERF_COUNT_HW_CACHE_RESULT_MISS        << 16)                          },
2007
2008   { .type = PERF_TYPE_HW_CACHE,
2009     .config =
2010          PERF_COUNT_HW_CACHE_ITLB               <<  0  |
2011         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
2012         (PERF_COUNT_HW_CACHE_RESULT_ACCESS      << 16)                          },
2013
2014   { .type = PERF_TYPE_HW_CACHE,
2015     .config =
2016          PERF_COUNT_HW_CACHE_ITLB               <<  0  |
2017         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
2018         (PERF_COUNT_HW_CACHE_RESULT_MISS        << 16)                          },
2019
2020 };
2021
2022 /*
2023  * Very, very detailed stats (-d -d -d), adding prefetch events:
2024  */
2025         struct perf_event_attr very_very_detailed_attrs[] = {
2026
2027   { .type = PERF_TYPE_HW_CACHE,
2028     .config =
2029          PERF_COUNT_HW_CACHE_L1D                <<  0  |
2030         (PERF_COUNT_HW_CACHE_OP_PREFETCH        <<  8) |
2031         (PERF_COUNT_HW_CACHE_RESULT_ACCESS      << 16)                          },
2032
2033   { .type = PERF_TYPE_HW_CACHE,
2034     .config =
2035          PERF_COUNT_HW_CACHE_L1D                <<  0  |
2036         (PERF_COUNT_HW_CACHE_OP_PREFETCH        <<  8) |
2037         (PERF_COUNT_HW_CACHE_RESULT_MISS        << 16)                          },
2038 };
2039
2040         /* Set attrs if no event is selected and !null_run: */
2041         if (null_run)
2042                 return 0;
2043
2044         if (transaction_run) {
2045                 struct parse_events_error errinfo;
2046
2047                 if (pmu_have_event("cpu", "cycles-ct") &&
2048                     pmu_have_event("cpu", "el-start"))
2049                         err = parse_events(evsel_list, transaction_attrs,
2050                                            &errinfo);
2051                 else
2052                         err = parse_events(evsel_list,
2053                                            transaction_limited_attrs,
2054                                            &errinfo);
2055                 if (err) {
2056                         fprintf(stderr, "Cannot set up transaction events\n");
2057                         return -1;
2058                 }
2059                 return 0;
2060         }
2061
2062         if (topdown_run) {
2063                 char *str = NULL;
2064                 bool warn = false;
2065
2066                 if (stat_config.aggr_mode != AGGR_GLOBAL &&
2067                     stat_config.aggr_mode != AGGR_CORE) {
2068                         pr_err("top down event configuration requires --per-core mode\n");
2069                         return -1;
2070                 }
2071                 stat_config.aggr_mode = AGGR_CORE;
2072                 if (nr_cgroups || !target__has_cpu(&target)) {
2073                         pr_err("top down event configuration requires system-wide mode (-a)\n");
2074                         return -1;
2075                 }
2076
2077                 if (!force_metric_only)
2078                         metric_only = true;
2079                 if (topdown_filter_events(topdown_attrs, &str,
2080                                 arch_topdown_check_group(&warn)) < 0) {
2081                         pr_err("Out of memory\n");
2082                         return -1;
2083                 }
2084                 if (topdown_attrs[0] && str) {
2085                         if (warn)
2086                                 arch_topdown_group_warn();
2087                         err = parse_events(evsel_list, str, NULL);
2088                         if (err) {
2089                                 fprintf(stderr,
2090                                         "Cannot set up top down events %s: %d\n",
2091                                         str, err);
2092                                 free(str);
2093                                 return -1;
2094                         }
2095                 } else {
2096                         fprintf(stderr, "System does not support topdown\n");
2097                         return -1;
2098                 }
2099                 free(str);
2100         }
2101
2102         if (!evsel_list->nr_entries) {
2103                 if (target__has_cpu(&target))
2104                         default_attrs0[0].config = PERF_COUNT_SW_CPU_CLOCK;
2105
2106                 if (perf_evlist__add_default_attrs(evsel_list, default_attrs0) < 0)
2107                         return -1;
2108                 if (pmu_have_event("cpu", "stalled-cycles-frontend")) {
2109                         if (perf_evlist__add_default_attrs(evsel_list,
2110                                                 frontend_attrs) < 0)
2111                                 return -1;
2112                 }
2113                 if (pmu_have_event("cpu", "stalled-cycles-backend")) {
2114                         if (perf_evlist__add_default_attrs(evsel_list,
2115                                                 backend_attrs) < 0)
2116                                 return -1;
2117                 }
2118                 if (perf_evlist__add_default_attrs(evsel_list, default_attrs1) < 0)
2119                         return -1;
2120         }
2121
2122         /* Detailed events get appended to the event list: */
2123
2124         if (detailed_run <  1)
2125                 return 0;
2126
2127         /* Append detailed run extra attributes: */
2128         if (perf_evlist__add_default_attrs(evsel_list, detailed_attrs) < 0)
2129                 return -1;
2130
2131         if (detailed_run < 2)
2132                 return 0;
2133
2134         /* Append very detailed run extra attributes: */
2135         if (perf_evlist__add_default_attrs(evsel_list, very_detailed_attrs) < 0)
2136                 return -1;
2137
2138         if (detailed_run < 3)
2139                 return 0;
2140
2141         /* Append very, very detailed run extra attributes: */
2142         return perf_evlist__add_default_attrs(evsel_list, very_very_detailed_attrs);
2143 }
2144
2145 static const char * const stat_record_usage[] = {
2146         "perf stat record [<options>]",
2147         NULL,
2148 };
2149
2150 static void init_features(struct perf_session *session)
2151 {
2152         int feat;
2153
2154         for (feat = HEADER_FIRST_FEATURE; feat < HEADER_LAST_FEATURE; feat++)
2155                 perf_header__set_feat(&session->header, feat);
2156
2157         perf_header__clear_feat(&session->header, HEADER_BUILD_ID);
2158         perf_header__clear_feat(&session->header, HEADER_TRACING_DATA);
2159         perf_header__clear_feat(&session->header, HEADER_BRANCH_STACK);
2160         perf_header__clear_feat(&session->header, HEADER_AUXTRACE);
2161 }
2162
2163 static int __cmd_record(int argc, const char **argv)
2164 {
2165         struct perf_session *session;
2166         struct perf_data_file *file = &perf_stat.file;
2167
2168         argc = parse_options(argc, argv, stat_options, stat_record_usage,
2169                              PARSE_OPT_STOP_AT_NON_OPTION);
2170
2171         if (output_name)
2172                 file->path = output_name;
2173
2174         if (run_count != 1 || forever) {
2175                 pr_err("Cannot use -r option with perf stat record.\n");
2176                 return -1;
2177         }
2178
2179         session = perf_session__new(file, false, NULL);
2180         if (session == NULL) {
2181                 pr_err("Perf session creation failed.\n");
2182                 return -1;
2183         }
2184
2185         init_features(session);
2186
2187         session->evlist   = evsel_list;
2188         perf_stat.session = session;
2189         perf_stat.record  = true;
2190         return argc;
2191 }
2192
2193 static int process_stat_round_event(struct perf_tool *tool __maybe_unused,
2194                                     union perf_event *event,
2195                                     struct perf_session *session)
2196 {
2197         struct stat_round_event *stat_round = &event->stat_round;
2198         struct perf_evsel *counter;
2199         struct timespec tsh, *ts = NULL;
2200         const char **argv = session->header.env.cmdline_argv;
2201         int argc = session->header.env.nr_cmdline;
2202
2203         evlist__for_each_entry(evsel_list, counter)
2204                 perf_stat_process_counter(&stat_config, counter);
2205
2206         if (stat_round->type == PERF_STAT_ROUND_TYPE__FINAL)
2207                 update_stats(&walltime_nsecs_stats, stat_round->time);
2208
2209         if (stat_config.interval && stat_round->time) {
2210                 tsh.tv_sec  = stat_round->time / NSEC_PER_SEC;
2211                 tsh.tv_nsec = stat_round->time % NSEC_PER_SEC;
2212                 ts = &tsh;
2213         }
2214
2215         print_counters(ts, argc, argv);
2216         return 0;
2217 }
2218
2219 static
2220 int process_stat_config_event(struct perf_tool *tool __maybe_unused,
2221                               union perf_event *event,
2222                               struct perf_session *session __maybe_unused)
2223 {
2224         struct perf_stat *st = container_of(tool, struct perf_stat, tool);
2225
2226         perf_event__read_stat_config(&stat_config, &event->stat_config);
2227
2228         if (cpu_map__empty(st->cpus)) {
2229                 if (st->aggr_mode != AGGR_UNSET)
2230                         pr_warning("warning: processing task data, aggregation mode not set\n");
2231                 return 0;
2232         }
2233
2234         if (st->aggr_mode != AGGR_UNSET)
2235                 stat_config.aggr_mode = st->aggr_mode;
2236
2237         if (perf_stat.file.is_pipe)
2238                 perf_stat_init_aggr_mode();
2239         else
2240                 perf_stat_init_aggr_mode_file(st);
2241
2242         return 0;
2243 }
2244
2245 static int set_maps(struct perf_stat *st)
2246 {
2247         if (!st->cpus || !st->threads)
2248                 return 0;
2249
2250         if (WARN_ONCE(st->maps_allocated, "stats double allocation\n"))
2251                 return -EINVAL;
2252
2253         perf_evlist__set_maps(evsel_list, st->cpus, st->threads);
2254
2255         if (perf_evlist__alloc_stats(evsel_list, true))
2256                 return -ENOMEM;
2257
2258         st->maps_allocated = true;
2259         return 0;
2260 }
2261
2262 static
2263 int process_thread_map_event(struct perf_tool *tool __maybe_unused,
2264                              union perf_event *event,
2265                              struct perf_session *session __maybe_unused)
2266 {
2267         struct perf_stat *st = container_of(tool, struct perf_stat, tool);
2268
2269         if (st->threads) {
2270                 pr_warning("Extra thread map event, ignoring.\n");
2271                 return 0;
2272         }
2273
2274         st->threads = thread_map__new_event(&event->thread_map);
2275         if (!st->threads)
2276                 return -ENOMEM;
2277
2278         return set_maps(st);
2279 }
2280
2281 static
2282 int process_cpu_map_event(struct perf_tool *tool __maybe_unused,
2283                           union perf_event *event,
2284                           struct perf_session *session __maybe_unused)
2285 {
2286         struct perf_stat *st = container_of(tool, struct perf_stat, tool);
2287         struct cpu_map *cpus;
2288
2289         if (st->cpus) {
2290                 pr_warning("Extra cpu map event, ignoring.\n");
2291                 return 0;
2292         }
2293
2294         cpus = cpu_map__new_data(&event->cpu_map.data);
2295         if (!cpus)
2296                 return -ENOMEM;
2297
2298         st->cpus = cpus;
2299         return set_maps(st);
2300 }
2301
2302 static const char * const stat_report_usage[] = {
2303         "perf stat report [<options>]",
2304         NULL,
2305 };
2306
2307 static struct perf_stat perf_stat = {
2308         .tool = {
2309                 .attr           = perf_event__process_attr,
2310                 .event_update   = perf_event__process_event_update,
2311                 .thread_map     = process_thread_map_event,
2312                 .cpu_map        = process_cpu_map_event,
2313                 .stat_config    = process_stat_config_event,
2314                 .stat           = perf_event__process_stat_event,
2315                 .stat_round     = process_stat_round_event,
2316         },
2317         .aggr_mode = AGGR_UNSET,
2318 };
2319
2320 static int __cmd_report(int argc, const char **argv)
2321 {
2322         struct perf_session *session;
2323         const struct option options[] = {
2324         OPT_STRING('i', "input", &input_name, "file", "input file name"),
2325         OPT_SET_UINT(0, "per-socket", &perf_stat.aggr_mode,
2326                      "aggregate counts per processor socket", AGGR_SOCKET),
2327         OPT_SET_UINT(0, "per-core", &perf_stat.aggr_mode,
2328                      "aggregate counts per physical processor core", AGGR_CORE),
2329         OPT_SET_UINT('A', "no-aggr", &perf_stat.aggr_mode,
2330                      "disable CPU count aggregation", AGGR_NONE),
2331         OPT_END()
2332         };
2333         struct stat st;
2334         int ret;
2335
2336         argc = parse_options(argc, argv, options, stat_report_usage, 0);
2337
2338         if (!input_name || !strlen(input_name)) {
2339                 if (!fstat(STDIN_FILENO, &st) && S_ISFIFO(st.st_mode))
2340                         input_name = "-";
2341                 else
2342                         input_name = "perf.data";
2343         }
2344
2345         perf_stat.file.path = input_name;
2346         perf_stat.file.mode = PERF_DATA_MODE_READ;
2347
2348         session = perf_session__new(&perf_stat.file, false, &perf_stat.tool);
2349         if (session == NULL)
2350                 return -1;
2351
2352         perf_stat.session  = session;
2353         stat_config.output = stderr;
2354         evsel_list         = session->evlist;
2355
2356         ret = perf_session__process_events(session);
2357         if (ret)
2358                 return ret;
2359
2360         perf_session__delete(session);
2361         return 0;
2362 }
2363
2364 int cmd_stat(int argc, const char **argv, const char *prefix __maybe_unused)
2365 {
2366         const char * const stat_usage[] = {
2367                 "perf stat [<options>] [<command>]",
2368                 NULL
2369         };
2370         int status = -EINVAL, run_idx;
2371         const char *mode;
2372         FILE *output = stderr;
2373         unsigned int interval;
2374         const char * const stat_subcommands[] = { "record", "report" };
2375
2376         setlocale(LC_ALL, "");
2377
2378         evsel_list = perf_evlist__new();
2379         if (evsel_list == NULL)
2380                 return -ENOMEM;
2381
2382         parse_events__shrink_config_terms();
2383         argc = parse_options_subcommand(argc, argv, stat_options, stat_subcommands,
2384                                         (const char **) stat_usage,
2385                                         PARSE_OPT_STOP_AT_NON_OPTION);
2386         perf_stat__init_shadow_stats();
2387
2388         if (csv_sep) {
2389                 csv_output = true;
2390                 if (!strcmp(csv_sep, "\\t"))
2391                         csv_sep = "\t";
2392         } else
2393                 csv_sep = DEFAULT_SEPARATOR;
2394
2395         if (argc && !strncmp(argv[0], "rec", 3)) {
2396                 argc = __cmd_record(argc, argv);
2397                 if (argc < 0)
2398                         return -1;
2399         } else if (argc && !strncmp(argv[0], "rep", 3))
2400                 return __cmd_report(argc, argv);
2401
2402         interval = stat_config.interval;
2403
2404         /*
2405          * For record command the -o is already taken care of.
2406          */
2407         if (!STAT_RECORD && output_name && strcmp(output_name, "-"))
2408                 output = NULL;
2409
2410         if (output_name && output_fd) {
2411                 fprintf(stderr, "cannot use both --output and --log-fd\n");
2412                 parse_options_usage(stat_usage, stat_options, "o", 1);
2413                 parse_options_usage(NULL, stat_options, "log-fd", 0);
2414                 goto out;
2415         }
2416
2417         if (metric_only && stat_config.aggr_mode == AGGR_THREAD) {
2418                 fprintf(stderr, "--metric-only is not supported with --per-thread\n");
2419                 goto out;
2420         }
2421
2422         if (metric_only && run_count > 1) {
2423                 fprintf(stderr, "--metric-only is not supported with -r\n");
2424                 goto out;
2425         }
2426
2427         if (output_fd < 0) {
2428                 fprintf(stderr, "argument to --log-fd must be a > 0\n");
2429                 parse_options_usage(stat_usage, stat_options, "log-fd", 0);
2430                 goto out;
2431         }
2432
2433         if (!output) {
2434                 struct timespec tm;
2435                 mode = append_file ? "a" : "w";
2436
2437                 output = fopen(output_name, mode);
2438                 if (!output) {
2439                         perror("failed to create output file");
2440                         return -1;
2441                 }
2442                 clock_gettime(CLOCK_REALTIME, &tm);
2443                 fprintf(output, "# started on %s\n", ctime(&tm.tv_sec));
2444         } else if (output_fd > 0) {
2445                 mode = append_file ? "a" : "w";
2446                 output = fdopen(output_fd, mode);
2447                 if (!output) {
2448                         perror("Failed opening logfd");
2449                         return -errno;
2450                 }
2451         }
2452
2453         stat_config.output = output;
2454
2455         /*
2456          * let the spreadsheet do the pretty-printing
2457          */
2458         if (csv_output) {
2459                 /* User explicitly passed -B? */
2460                 if (big_num_opt == 1) {
2461                         fprintf(stderr, "-B option not supported with -x\n");
2462                         parse_options_usage(stat_usage, stat_options, "B", 1);
2463                         parse_options_usage(NULL, stat_options, "x", 1);
2464                         goto out;
2465                 } else /* Nope, so disable big number formatting */
2466                         big_num = false;
2467         } else if (big_num_opt == 0) /* User passed --no-big-num */
2468                 big_num = false;
2469
2470         if (!argc && target__none(&target))
2471                 usage_with_options(stat_usage, stat_options);
2472
2473         if (run_count < 0) {
2474                 pr_err("Run count must be a positive number\n");
2475                 parse_options_usage(stat_usage, stat_options, "r", 1);
2476                 goto out;
2477         } else if (run_count == 0) {
2478                 forever = true;
2479                 run_count = 1;
2480         }
2481
2482         if ((stat_config.aggr_mode == AGGR_THREAD) && !target__has_task(&target)) {
2483                 fprintf(stderr, "The --per-thread option is only available "
2484                         "when monitoring via -p -t options.\n");
2485                 parse_options_usage(NULL, stat_options, "p", 1);
2486                 parse_options_usage(NULL, stat_options, "t", 1);
2487                 goto out;
2488         }
2489
2490         /*
2491          * no_aggr, cgroup are for system-wide only
2492          * --per-thread is aggregated per thread, we dont mix it with cpu mode
2493          */
2494         if (((stat_config.aggr_mode != AGGR_GLOBAL &&
2495               stat_config.aggr_mode != AGGR_THREAD) || nr_cgroups) &&
2496             !target__has_cpu(&target)) {
2497                 fprintf(stderr, "both cgroup and no-aggregation "
2498                         "modes only available in system-wide mode\n");
2499
2500                 parse_options_usage(stat_usage, stat_options, "G", 1);
2501                 parse_options_usage(NULL, stat_options, "A", 1);
2502                 parse_options_usage(NULL, stat_options, "a", 1);
2503                 goto out;
2504         }
2505
2506         if (add_default_attributes())
2507                 goto out;
2508
2509         target__validate(&target);
2510
2511         if (perf_evlist__create_maps(evsel_list, &target) < 0) {
2512                 if (target__has_task(&target)) {
2513                         pr_err("Problems finding threads of monitor\n");
2514                         parse_options_usage(stat_usage, stat_options, "p", 1);
2515                         parse_options_usage(NULL, stat_options, "t", 1);
2516                 } else if (target__has_cpu(&target)) {
2517                         perror("failed to parse CPUs map");
2518                         parse_options_usage(stat_usage, stat_options, "C", 1);
2519                         parse_options_usage(NULL, stat_options, "a", 1);
2520                 }
2521                 goto out;
2522         }
2523
2524         /*
2525          * Initialize thread_map with comm names,
2526          * so we could print it out on output.
2527          */
2528         if (stat_config.aggr_mode == AGGR_THREAD)
2529                 thread_map__read_comms(evsel_list->threads);
2530
2531         if (interval && interval < 100) {
2532                 if (interval < 10) {
2533                         pr_err("print interval must be >= 10ms\n");
2534                         parse_options_usage(stat_usage, stat_options, "I", 1);
2535                         goto out;
2536                 } else
2537                         pr_warning("print interval < 100ms. "
2538                                    "The overhead percentage could be high in some cases. "
2539                                    "Please proceed with caution.\n");
2540         }
2541
2542         if (perf_evlist__alloc_stats(evsel_list, interval))
2543                 goto out;
2544
2545         if (perf_stat_init_aggr_mode())
2546                 goto out;
2547
2548         /*
2549          * We dont want to block the signals - that would cause
2550          * child tasks to inherit that and Ctrl-C would not work.
2551          * What we want is for Ctrl-C to work in the exec()-ed
2552          * task, but being ignored by perf stat itself:
2553          */
2554         atexit(sig_atexit);
2555         if (!forever)
2556                 signal(SIGINT,  skip_signal);
2557         signal(SIGCHLD, skip_signal);
2558         signal(SIGALRM, skip_signal);
2559         signal(SIGABRT, skip_signal);
2560
2561         status = 0;
2562         for (run_idx = 0; forever || run_idx < run_count; run_idx++) {
2563                 if (run_count != 1 && verbose)
2564                         fprintf(output, "[ perf stat: executing run #%d ... ]\n",
2565                                 run_idx + 1);
2566
2567                 if (run_idx != 0)
2568                         perf_evlist__reset_prev_raw_counts(evsel_list);
2569
2570                 status = run_perf_stat(argc, argv);
2571                 if (forever && status != -1 && !interval) {
2572                         print_counters(NULL, argc, argv);
2573                         perf_stat__reset_stats();
2574                 }
2575         }
2576
2577         if (!forever && status != -1 && !interval)
2578                 print_counters(NULL, argc, argv);
2579
2580         if (STAT_RECORD) {
2581                 /*
2582                  * We synthesize the kernel mmap record just so that older tools
2583                  * don't emit warnings about not being able to resolve symbols
2584                  * due to /proc/sys/kernel/kptr_restrict settings and instear provide
2585                  * a saner message about no samples being in the perf.data file.
2586                  *
2587                  * This also serves to suppress a warning about f_header.data.size == 0
2588                  * in header.c at the moment 'perf stat record' gets introduced, which
2589                  * is not really needed once we start adding the stat specific PERF_RECORD_
2590                  * records, but the need to suppress the kptr_restrict messages in older
2591                  * tools remain  -acme
2592                  */
2593                 int fd = perf_data_file__fd(&perf_stat.file);
2594                 int err = perf_event__synthesize_kernel_mmap((void *)&perf_stat,
2595                                                              process_synthesized_event,
2596                                                              &perf_stat.session->machines.host);
2597                 if (err) {
2598                         pr_warning("Couldn't synthesize the kernel mmap record, harmless, "
2599                                    "older tools may produce warnings about this file\n.");
2600                 }
2601
2602                 if (!interval) {
2603                         if (WRITE_STAT_ROUND_EVENT(walltime_nsecs_stats.max, FINAL))
2604                                 pr_err("failed to write stat round event\n");
2605                 }
2606
2607                 if (!perf_stat.file.is_pipe) {
2608                         perf_stat.session->header.data_size += perf_stat.bytes_written;
2609                         perf_session__write_header(perf_stat.session, evsel_list, fd, true);
2610                 }
2611
2612                 perf_session__delete(perf_stat.session);
2613         }
2614
2615         perf_stat__exit_aggr_mode();
2616         perf_evlist__free_stats(evsel_list);
2617 out:
2618         perf_evlist__delete(evsel_list);
2619         return status;
2620 }