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                                 return -1;
 316
 317                         if (STAT_RECORD) {
 318                                 if (perf_evsel__write_stat_event(counter, cpu, thread, count)) {
 319                                         pr_err("failed to write stat event\n");
 320                                         return -1;
 321                                 }
 322                         }
 323
 324                         if (verbose > 1) {
 325                                 fprintf(stat_config.output,
 326                                         "%s: %d: %" PRIu64 " %" PRIu64 " %" PRIu64 "\n",
 327                                                 perf_evsel__name(counter),
 328                                                 cpu,
 329                                                 count->val, count->ena, count->run);
 330                         }
 331                 }
 332         }
 333
 334         return 0;
 335 }
 336
 337 static void read_counters(void)
 338 {
 339         struct perf_evsel *counter;
 340
 341         evlist__for_each_entry(evsel_list, counter) {
 342                 if (read_counter(counter))
 343                         pr_debug("failed to read counter %s\n", counter->name);
 344
 345                 if (perf_stat_process_counter(&stat_config, counter))
 346                         pr_warning("failed to process counter %s\n", counter->name);
 347         }
 348 }
 349
 350 static void process_interval(void)
 351 {
 352         struct timespec ts, rs;
 353
 354         read_counters();
 355
 356         clock_gettime(CLOCK_MONOTONIC, &ts);
 357         diff_timespec(&rs, &ts, &ref_time);
 358
 359         if (STAT_RECORD) {
 360                 if (WRITE_STAT_ROUND_EVENT(rs.tv_sec * NSEC_PER_SEC + rs.tv_nsec, INTERVAL))
 361                         pr_err("failed to write stat round event\n");
 362         }
 363
 364         print_counters(&rs, 0, NULL);
 365 }
 366
 367 static void enable_counters(void)
 368 {
 369         if (initial_delay)
 370                 usleep(initial_delay * USEC_PER_MSEC);
 371
 372         /*
 373          * We need to enable counters only if:
 374          * - we don't have tracee (attaching to task or cpu)
 375          * - we have initial delay configured
 376          */
 377         if (!target__none(&target) || initial_delay)
 378                 perf_evlist__enable(evsel_list);
 379 }
 380
 381 static void disable_counters(void)
 382 {
 383         /*
 384          * If we don't have tracee (attaching to task or cpu), counters may
 385          * still be running. To get accurate group ratios, we must stop groups
 386          * from counting before reading their constituent counters.
 387          */
 388         if (!target__none(&target))
 389                 perf_evlist__disable(evsel_list);
 390 }
 391
 392 static volatile int workload_exec_errno;
 393
 394 /*
 395  * perf_evlist__prepare_workload will send a SIGUSR1
 396  * if the fork fails, since we asked by setting its
 397  * want_signal to true.
 398  */
 399 static void workload_exec_failed_signal(int signo __maybe_unused, siginfo_t *info,
 400                                         void *ucontext __maybe_unused)
 401 {
 402         workload_exec_errno = info->si_value.sival_int;
 403 }
 404
 405 static bool has_unit(struct perf_evsel *counter)
 406 {
 407         return counter->unit && *counter->unit;
 408 }
 409
 410 static bool has_scale(struct perf_evsel *counter)
 411 {
 412         return counter->scale != 1;
 413 }
 414
 415 static int perf_stat_synthesize_config(bool is_pipe)
 416 {
 417         struct perf_evsel *counter;
 418         int err;
 419
 420         if (is_pipe) {
 421                 err = perf_event__synthesize_attrs(NULL, perf_stat.session,
 422                                                    process_synthesized_event);
 423                 if (err < 0) {
 424                         pr_err("Couldn't synthesize attrs.\n");
 425                         return err;
 426                 }
 427         }
 428
 429         /*
 430          * Synthesize other events stuff not carried within
 431          * attr event - unit, scale, name
 432          */
 433         evlist__for_each_entry(evsel_list, counter) {
 434                 if (!counter->supported)
 435                         continue;
 436
 437                 /*
 438                  * Synthesize unit and scale only if it's defined.
 439                  */
 440                 if (has_unit(counter)) {
 441                         err = perf_event__synthesize_event_update_unit(NULL, counter, process_synthesized_event);
 442                         if (err < 0) {
 443                                 pr_err("Couldn't synthesize evsel unit.\n");
 444                                 return err;
 445                         }
 446                 }
 447
 448                 if (has_scale(counter)) {
 449                         err = perf_event__synthesize_event_update_scale(NULL, counter, process_synthesized_event);
 450                         if (err < 0) {
 451                                 pr_err("Couldn't synthesize evsel scale.\n");
 452                                 return err;
 453                         }
 454                 }
 455
 456                 if (counter->own_cpus) {
 457                         err = perf_event__synthesize_event_update_cpus(NULL, counter, process_synthesized_event);
 458                         if (err < 0) {
 459                                 pr_err("Couldn't synthesize evsel scale.\n");
 460                                 return err;
 461                         }
 462                 }
 463
 464                 /*
 465                  * Name is needed only for pipe output,
 466                  * perf.data carries event names.
 467                  */
 468                 if (is_pipe) {
 469                         err = perf_event__synthesize_event_update_name(NULL, counter, process_synthesized_event);
 470                         if (err < 0) {
 471                                 pr_err("Couldn't synthesize evsel name.\n");
 472                                 return err;
 473                         }
 474                 }
 475         }
 476
 477         err = perf_event__synthesize_thread_map2(NULL, evsel_list->threads,
 478                                                 process_synthesized_event,
 479                                                 NULL);
 480         if (err < 0) {
 481                 pr_err("Couldn't synthesize thread map.\n");
 482                 return err;
 483         }
 484
 485         err = perf_event__synthesize_cpu_map(NULL, evsel_list->cpus,
 486                                              process_synthesized_event, NULL);
 487         if (err < 0) {
 488                 pr_err("Couldn't synthesize thread map.\n");
 489                 return err;
 490         }
 491
 492         err = perf_event__synthesize_stat_config(NULL, &stat_config,
 493                                                  process_synthesized_event, NULL);
 494         if (err < 0) {
 495                 pr_err("Couldn't synthesize config.\n");
 496                 return err;
 497         }
 498
 499         return 0;
 500 }
 501
 502 #define FD(e, x, y) (*(int *)xyarray__entry(e->fd, x, y))
 503
 504 static int __store_counter_ids(struct perf_evsel *counter,
 505                                struct cpu_map *cpus,
 506                                struct thread_map *threads)
 507 {
 508         int cpu, thread;
 509
 510         for (cpu = 0; cpu < cpus->nr; cpu++) {
 511                 for (thread = 0; thread < threads->nr; thread++) {
 512                         int fd = FD(counter, cpu, thread);
 513
 514                         if (perf_evlist__id_add_fd(evsel_list, counter,
 515                                                    cpu, thread, fd) < 0)
 516                                 return -1;
 517                 }
 518         }
 519
 520         return 0;
 521 }
 522
 523 static int store_counter_ids(struct perf_evsel *counter)
 524 {
 525         struct cpu_map *cpus = counter->cpus;
 526         struct thread_map *threads = counter->threads;
 527
 528         if (perf_evsel__alloc_id(counter, cpus->nr, threads->nr))
 529                 return -ENOMEM;
 530
 531         return __store_counter_ids(counter, cpus, threads);
 532 }
 533
 534 static int __run_perf_stat(int argc, const char **argv)
 535 {
 536         int interval = stat_config.interval;
 537         char msg[BUFSIZ];
 538         unsigned long long t0, t1;
 539         struct perf_evsel *counter;
 540         struct timespec ts;
 541         size_t l;
 542         int status = 0;
 543         const bool forks = (argc > 0);
 544         bool is_pipe = STAT_RECORD ? perf_stat.file.is_pipe : false;
 545         struct perf_evsel_config_term *err_term;
 546
 547         if (interval) {
 548                 ts.tv_sec  = interval / USEC_PER_MSEC;
 549                 ts.tv_nsec = (interval % USEC_PER_MSEC) * NSEC_PER_MSEC;
 550         } else {
 551                 ts.tv_sec  = 1;
 552                 ts.tv_nsec = 0;
 553         }
 554
 555         if (forks) {
 556                 if (perf_evlist__prepare_workload(evsel_list, &target, argv, is_pipe,
 557                                                   workload_exec_failed_signal) < 0) {
 558                         perror("failed to prepare workload");
 559                         return -1;
 560                 }
 561                 child_pid = evsel_list->workload.pid;
 562         }
 563
 564         if (group)
 565                 perf_evlist__set_leader(evsel_list);
 566
 567         evlist__for_each_entry(evsel_list, counter) {
 568 try_again:
 569                 if (create_perf_stat_counter(counter) < 0) {
 570                         /*
 571                          * PPC returns ENXIO for HW counters until 2.6.37
 572                          * (behavior changed with commit b0a873e).
 573                          */
 574                         if (errno == EINVAL || errno == ENOSYS ||
 575                             errno == ENOENT || errno == EOPNOTSUPP ||
 576                             errno == ENXIO) {
 577                                 if (verbose > 0)
 578                                         ui__warning("%s event is not supported by the kernel.\n",
 579                                                     perf_evsel__name(counter));
 580                                 counter->supported = false;
 581
 582                                 if ((counter->leader != counter) ||
 583                                     !(counter->leader->nr_members > 1))
 584                                         continue;
 585                         } else if (perf_evsel__fallback(counter, errno, msg, sizeof(msg))) {
 586                                 if (verbose > 0)
 587                                         ui__warning("%s\n", msg);
 588                                 goto try_again;
 589                         }
 590
 591                         perf_evsel__open_strerror(counter, &target,
 592                                                   errno, msg, sizeof(msg));
 593                         ui__error("%s\n", msg);
 594
 595                         if (child_pid != -1)
 596                                 kill(child_pid, SIGTERM);
 597
 598                         return -1;
 599                 }
 600                 counter->supported = true;
 601
 602                 l = strlen(counter->unit);
 603                 if (l > unit_width)
 604                         unit_width = l;
 605
 606                 if (STAT_RECORD && store_counter_ids(counter))
 607                         return -1;
 608         }
 609
 610         if (perf_evlist__apply_filters(evsel_list, &counter)) {
 611                 error("failed to set filter \"%s\" on event %s with %d (%s)\n",
 612                         counter->filter, perf_evsel__name(counter), errno,
 613                         str_error_r(errno, msg, sizeof(msg)));
 614                 return -1;
 615         }
 616
 617         if (perf_evlist__apply_drv_configs(evsel_list, &counter, &err_term)) {
 618                 error("failed to set config \"%s\" on event %s with %d (%s)\n",
 619                       err_term->val.drv_cfg, perf_evsel__name(counter), errno,
 620                       str_error_r(errno, msg, sizeof(msg)));
 621                 return -1;
 622         }
 623
 624         if (STAT_RECORD) {
 625                 int err, fd = perf_data_file__fd(&perf_stat.file);
 626
 627                 if (is_pipe) {
 628                         err = perf_header__write_pipe(perf_data_file__fd(&perf_stat.file));
 629                 } else {
 630                         err = perf_session__write_header(perf_stat.session, evsel_list,
 631                                                          fd, false);
 632                 }
 633
 634                 if (err < 0)
 635                         return err;
 636
 637                 err = perf_stat_synthesize_config(is_pipe);
 638                 if (err < 0)
 639                         return err;
 640         }
 641
 642         /*
 643          * Enable counters and exec the command:
 644          */
 645         t0 = rdclock();
 646         clock_gettime(CLOCK_MONOTONIC, &ref_time);
 647
 648         if (forks) {
 649                 perf_evlist__start_workload(evsel_list);
 650                 enable_counters();
 651
 652                 if (interval) {
 653                         while (!waitpid(child_pid, &status, WNOHANG)) {
 654                                 nanosleep(&ts, NULL);
 655                                 process_interval();
 656                         }
 657                 }
 658                 wait(&status);
 659
 660                 if (workload_exec_errno) {
 661                         const char *emsg = str_error_r(workload_exec_errno, msg, sizeof(msg));
 662                         pr_err("Workload failed: %s\n", emsg);
 663                         return -1;
 664                 }
 665
 666                 if (WIFSIGNALED(status))
 667                         psignal(WTERMSIG(status), argv[0]);
 668         } else {
 669                 enable_counters();
 670                 while (!done) {
 671                         nanosleep(&ts, NULL);
 672                         if (interval)
 673                                 process_interval();
 674                 }
 675         }
 676
 677         disable_counters();
 678
 679         t1 = rdclock();
 680
 681         update_stats(&walltime_nsecs_stats, t1 - t0);
 682
 683         /*
 684          * Closing a group leader splits the group, and as we only disable
 685          * group leaders, results in remaining events becoming enabled. To
 686          * avoid arbitrary skew, we must read all counters before closing any
 687          * group leaders.
 688          */
 689         read_counters();
 690         perf_evlist__close(evsel_list);
 691
 692         return WEXITSTATUS(status);
 693 }
 694
 695 static int run_perf_stat(int argc, const char **argv)
 696 {
 697         int ret;
 698
 699         if (pre_cmd) {
 700                 ret = system(pre_cmd);
 701                 if (ret)
 702                         return ret;
 703         }
 704
 705         if (sync_run)
 706                 sync();
 707
 708         ret = __run_perf_stat(argc, argv);
 709         if (ret)
 710                 return ret;
 711
 712         if (post_cmd) {
 713                 ret = system(post_cmd);
 714                 if (ret)
 715                         return ret;
 716         }
 717
 718         return ret;
 719 }
 720
 721 static void print_running(u64 run, u64 ena)
 722 {
 723         if (csv_output) {
 724                 fprintf(stat_config.output, "%s%" PRIu64 "%s%.2f",
 725                                         csv_sep,
 726                                         run,
 727                                         csv_sep,
 728                                         ena ? 100.0 * run / ena : 100.0);
 729         } else if (run != ena) {
 730                 fprintf(stat_config.output, "  (%.2f%%)", 100.0 * run / ena);
 731         }
 732 }
 733
 734 static void print_noise_pct(double total, double avg)
 735 {
 736         double pct = rel_stddev_stats(total, avg);
 737
 738         if (csv_output)
 739                 fprintf(stat_config.output, "%s%.2f%%", csv_sep, pct);
 740         else if (pct)
 741                 fprintf(stat_config.output, "  ( +-%6.2f%% )", pct);
 742 }
 743
 744 static void print_noise(struct perf_evsel *evsel, double avg)
 745 {
 746         struct perf_stat_evsel *ps;
 747
 748         if (run_count == 1)
 749                 return;
 750
 751         ps = evsel->priv;
 752         print_noise_pct(stddev_stats(&ps->res_stats[0]), avg);
 753 }
 754
 755 static void aggr_printout(struct perf_evsel *evsel, int id, int nr)
 756 {
 757         switch (stat_config.aggr_mode) {
 758         case AGGR_CORE:
 759                 fprintf(stat_config.output, "S%d-C%*d%s%*d%s",
 760                         cpu_map__id_to_socket(id),
 761                         csv_output ? 0 : -8,
 762                         cpu_map__id_to_cpu(id),
 763                         csv_sep,
 764                         csv_output ? 0 : 4,
 765                         nr,
 766                         csv_sep);
 767                 break;
 768         case AGGR_SOCKET:
 769                 fprintf(stat_config.output, "S%*d%s%*d%s",
 770                         csv_output ? 0 : -5,
 771                         id,
 772                         csv_sep,
 773                         csv_output ? 0 : 4,
 774                         nr,
 775                         csv_sep);
 776                         break;
 777         case AGGR_NONE:
 778                 fprintf(stat_config.output, "CPU%*d%s",
 779                         csv_output ? 0 : -4,
 780                         perf_evsel__cpus(evsel)->map[id], csv_sep);
 781                 break;
 782         case AGGR_THREAD:
 783                 fprintf(stat_config.output, "%*s-%*d%s",
 784                         csv_output ? 0 : 16,
 785                         thread_map__comm(evsel->threads, id),
 786                         csv_output ? 0 : -8,
 787                         thread_map__pid(evsel->threads, id),
 788                         csv_sep);
 789                 break;
 790         case AGGR_GLOBAL:
 791         case AGGR_UNSET:
 792         default:
 793                 break;
 794         }
 795 }
 796
 797 struct outstate {
 798         FILE *fh;
 799         bool newline;
 800         const char *prefix;
 801         int  nfields;
 802         int  id, nr;
 803         struct perf_evsel *evsel;
 804 };
 805
 806 #define METRIC_LEN  35
 807
 808 static void new_line_std(void *ctx)
 809 {
 810         struct outstate *os = ctx;
 811
 812         os->newline = true;
 813 }
 814
 815 static void do_new_line_std(struct outstate *os)
 816 {
 817         fputc('\n', os->fh);
 818         fputs(os->prefix, os->fh);
 819         aggr_printout(os->evsel, os->id, os->nr);
 820         if (stat_config.aggr_mode == AGGR_NONE)
 821                 fprintf(os->fh, "        ");
 822         fprintf(os->fh, "                                                 ");
 823 }
 824
 825 static void print_metric_std(void *ctx, const char *color, const char *fmt,
 826                              const char *unit, double val)
 827 {
 828         struct outstate *os = ctx;
 829         FILE *out = os->fh;
 830         int n;
 831         bool newline = os->newline;
 832
 833         os->newline = false;
 834
 835         if (unit == NULL || fmt == NULL) {
 836                 fprintf(out, "%-*s", METRIC_LEN, "");
 837                 return;
 838         }
 839
 840         if (newline)
 841                 do_new_line_std(os);
 842
 843         n = fprintf(out, " # ");
 844         if (color)
 845                 n += color_fprintf(out, color, fmt, val);
 846         else
 847                 n += fprintf(out, fmt, val);
 848         fprintf(out, " %-*s", METRIC_LEN - n - 1, unit);
 849 }
 850
 851 static void new_line_csv(void *ctx)
 852 {
 853         struct outstate *os = ctx;
 854         int i;
 855
 856         fputc('\n', os->fh);
 857         if (os->prefix)
 858                 fprintf(os->fh, "%s%s", os->prefix, csv_sep);
 859         aggr_printout(os->evsel, os->id, os->nr);
 860         for (i = 0; i < os->nfields; i++)
 861                 fputs(csv_sep, os->fh);
 862 }
 863
 864 static void print_metric_csv(void *ctx,
 865                              const char *color __maybe_unused,
 866                              const char *fmt, const char *unit, double val)
 867 {
 868         struct outstate *os = ctx;
 869         FILE *out = os->fh;
 870         char buf[64], *vals, *ends;
 871
 872         if (unit == NULL || fmt == NULL) {
 873                 fprintf(out, "%s%s%s%s", csv_sep, csv_sep, csv_sep, csv_sep);
 874                 return;
 875         }
 876         snprintf(buf, sizeof(buf), fmt, val);
 877         vals = buf;
 878         while (isspace(*vals))
 879                 vals++;
 880         ends = vals;
 881         while (isdigit(*ends) || *ends == '.')
 882                 ends++;
 883         *ends = 0;
 884         while (isspace(*unit))
 885                 unit++;
 886         fprintf(out, "%s%s%s%s", csv_sep, vals, csv_sep, unit);
 887 }
 888
 889 #define METRIC_ONLY_LEN 20
 890
 891 /* Filter out some columns that don't work well in metrics only mode */
 892
 893 static bool valid_only_metric(const char *unit)
 894 {
 895         if (!unit)
 896                 return false;
 897         if (strstr(unit, "/sec") ||
 898             strstr(unit, "hz") ||
 899             strstr(unit, "Hz") ||
 900             strstr(unit, "CPUs utilized"))
 901                 return false;
 902         return true;
 903 }
 904
 905 static const char *fixunit(char *buf, struct perf_evsel *evsel,
 906                            const char *unit)
 907 {
 908         if (!strncmp(unit, "of all", 6)) {
 909                 snprintf(buf, 1024, "%s %s", perf_evsel__name(evsel),
 910                          unit);
 911                 return buf;
 912         }
 913         return unit;
 914 }
 915
 916 static void print_metric_only(void *ctx, const char *color, const char *fmt,
 917                               const char *unit, double val)
 918 {
 919         struct outstate *os = ctx;
 920         FILE *out = os->fh;
 921         int n;
 922         char buf[1024];
 923         unsigned mlen = METRIC_ONLY_LEN;
 924
 925         if (!valid_only_metric(unit))
 926                 return;
 927         unit = fixunit(buf, os->evsel, unit);
 928         if (color)
 929                 n = color_fprintf(out, color, fmt, val);
 930         else
 931                 n = fprintf(out, fmt, val);
 932         if (n > METRIC_ONLY_LEN)
 933                 n = METRIC_ONLY_LEN;
 934         if (mlen < strlen(unit))
 935                 mlen = strlen(unit) + 1;
 936         fprintf(out, "%*s", mlen - n, "");
 937 }
 938
 939 static void print_metric_only_csv(void *ctx, const char *color __maybe_unused,
 940                                   const char *fmt,
 941                                   const char *unit, double val)
 942 {
 943         struct outstate *os = ctx;
 944         FILE *out = os->fh;
 945         char buf[64], *vals, *ends;
 946         char tbuf[1024];
 947
 948         if (!valid_only_metric(unit))
 949                 return;
 950         unit = fixunit(tbuf, os->evsel, unit);
 951         snprintf(buf, sizeof buf, fmt, val);
 952         vals = buf;
 953         while (isspace(*vals))
 954                 vals++;
 955         ends = vals;
 956         while (isdigit(*ends) || *ends == '.')
 957                 ends++;
 958         *ends = 0;
 959         fprintf(out, "%s%s", vals, csv_sep);
 960 }
 961
 962 static void new_line_metric(void *ctx __maybe_unused)
 963 {
 964 }
 965
 966 static void print_metric_header(void *ctx, const char *color __maybe_unused,
 967                                 const char *fmt __maybe_unused,
 968                                 const char *unit, double val __maybe_unused)
 969 {
 970         struct outstate *os = ctx;
 971         char tbuf[1024];
 972
 973         if (!valid_only_metric(unit))
 974                 return;
 975         unit = fixunit(tbuf, os->evsel, unit);
 976         if (csv_output)
 977                 fprintf(os->fh, "%s%s", unit, csv_sep);
 978         else
 979                 fprintf(os->fh, "%-*s ", METRIC_ONLY_LEN, unit);
 980 }
 981
 982 static void nsec_printout(int id, int nr, struct perf_evsel *evsel, double avg)
 983 {
 984         FILE *output = stat_config.output;
 985         double msecs = avg / NSEC_PER_MSEC;
 986         const char *fmt_v, *fmt_n;
 987         char name[25];
 988
 989         fmt_v = csv_output ? "%.6f%s" : "%18.6f%s";
 990         fmt_n = csv_output ? "%s" : "%-25s";
 991
 992         aggr_printout(evsel, id, nr);
 993
 994         scnprintf(name, sizeof(name), "%s%s",
 995                   perf_evsel__name(evsel), csv_output ? "" : " (msec)");
 996
 997         fprintf(output, fmt_v, msecs, csv_sep);
 998
 999         if (csv_output)
1000                 fprintf(output, "%s%s", evsel->unit, csv_sep);
1001         else
1002                 fprintf(output, "%-*s%s", unit_width, evsel->unit, csv_sep);
1003
1004         fprintf(output, fmt_n, name);
1005
1006         if (evsel->cgrp)
1007                 fprintf(output, "%s%s", csv_sep, evsel->cgrp->name);
1008 }
1009
1010 static int first_shadow_cpu(struct perf_evsel *evsel, int id)
1011 {
1012         int i;
1013
1014         if (!aggr_get_id)
1015                 return 0;
1016
1017         if (stat_config.aggr_mode == AGGR_NONE)
1018                 return id;
1019
1020         if (stat_config.aggr_mode == AGGR_GLOBAL)
1021                 return 0;
1022
1023         for (i = 0; i < perf_evsel__nr_cpus(evsel); i++) {
1024                 int cpu2 = perf_evsel__cpus(evsel)->map[i];
1025
1026                 if (aggr_get_id(evsel_list->cpus, cpu2) == id)
1027                         return cpu2;
1028         }
1029         return 0;
1030 }
1031
1032 static void abs_printout(int id, int nr, struct perf_evsel *evsel, double avg)
1033 {
1034         FILE *output = stat_config.output;
1035         double sc =  evsel->scale;
1036         const char *fmt;
1037
1038         if (csv_output) {
1039                 fmt = floor(sc) != sc ?  "%.2f%s" : "%.0f%s";
1040         } else {
1041                 if (big_num)
1042                         fmt = floor(sc) != sc ? "%'18.2f%s" : "%'18.0f%s";
1043                 else
1044                         fmt = floor(sc) != sc ? "%18.2f%s" : "%18.0f%s";
1045         }
1046
1047         aggr_printout(evsel, id, nr);
1048
1049         fprintf(output, fmt, avg, csv_sep);
1050
1051         if (evsel->unit)
1052                 fprintf(output, "%-*s%s",
1053                         csv_output ? 0 : unit_width,
1054                         evsel->unit, csv_sep);
1055
1056         fprintf(output, "%-*s", csv_output ? 0 : 25, perf_evsel__name(evsel));
1057
1058         if (evsel->cgrp)
1059                 fprintf(output, "%s%s", csv_sep, evsel->cgrp->name);
1060 }
1061
1062 static void printout(int id, int nr, struct perf_evsel *counter, double uval,
1063                      char *prefix, u64 run, u64 ena, double noise)
1064 {
1065         struct perf_stat_output_ctx out;
1066         struct outstate os = {
1067                 .fh = stat_config.output,
1068                 .prefix = prefix ? prefix : "",
1069                 .id = id,
1070                 .nr = nr,
1071                 .evsel = counter,
1072         };
1073         print_metric_t pm = print_metric_std;
1074         void (*nl)(void *);
1075
1076         if (metric_only) {
1077                 nl = new_line_metric;
1078                 if (csv_output)
1079                         pm = print_metric_only_csv;
1080                 else
1081                         pm = print_metric_only;
1082         } else
1083                 nl = new_line_std;
1084
1085         if (csv_output && !metric_only) {
1086                 static int aggr_fields[] = {
1087                         [AGGR_GLOBAL] = 0,
1088                         [AGGR_THREAD] = 1,
1089                         [AGGR_NONE] = 1,
1090                         [AGGR_SOCKET] = 2,
1091                         [AGGR_CORE] = 2,
1092                 };
1093
1094                 pm = print_metric_csv;
1095                 nl = new_line_csv;
1096                 os.nfields = 3;
1097                 os.nfields += aggr_fields[stat_config.aggr_mode];
1098                 if (counter->cgrp)
1099                         os.nfields++;
1100         }
1101         if (run == 0 || ena == 0 || counter->counts->scaled == -1) {
1102                 if (metric_only) {
1103                         pm(&os, NULL, "", "", 0);
1104                         return;
1105                 }
1106                 aggr_printout(counter, id, nr);
1107
1108                 fprintf(stat_config.output, "%*s%s",
1109                         csv_output ? 0 : 18,
1110                         counter->supported ? CNTR_NOT_COUNTED : CNTR_NOT_SUPPORTED,
1111                         csv_sep);
1112
1113                 if (counter->supported)
1114                         print_free_counters_hint = 1;
1115
1116                 fprintf(stat_config.output, "%-*s%s",
1117                         csv_output ? 0 : unit_width,
1118                         counter->unit, csv_sep);
1119
1120                 fprintf(stat_config.output, "%*s",
1121                         csv_output ? 0 : -25,
1122                         perf_evsel__name(counter));
1123
1124                 if (counter->cgrp)
1125                         fprintf(stat_config.output, "%s%s",
1126                                 csv_sep, counter->cgrp->name);
1127
1128                 if (!csv_output)
1129                         pm(&os, NULL, NULL, "", 0);
1130                 print_noise(counter, noise);
1131                 print_running(run, ena);
1132                 if (csv_output)
1133                         pm(&os, NULL, NULL, "", 0);
1134                 return;
1135         }
1136
1137         if (metric_only)
1138                 /* nothing */;
1139         else if (nsec_counter(counter))
1140                 nsec_printout(id, nr, counter, uval);
1141         else
1142                 abs_printout(id, nr, counter, uval);
1143
1144         out.print_metric = pm;
1145         out.new_line = nl;
1146         out.ctx = &os;
1147
1148         if (csv_output && !metric_only) {
1149                 print_noise(counter, noise);
1150                 print_running(run, ena);
1151         }
1152
1153         perf_stat__print_shadow_stats(counter, uval,
1154                                 first_shadow_cpu(counter, id),
1155                                 &out);
1156         if (!csv_output && !metric_only) {
1157                 print_noise(counter, noise);
1158                 print_running(run, ena);
1159         }
1160 }
1161
1162 static void aggr_update_shadow(void)
1163 {
1164         int cpu, s2, id, s;
1165         u64 val;
1166         struct perf_evsel *counter;
1167
1168         for (s = 0; s < aggr_map->nr; s++) {
1169                 id = aggr_map->map[s];
1170                 evlist__for_each_entry(evsel_list, counter) {
1171                         val = 0;
1172                         for (cpu = 0; cpu < perf_evsel__nr_cpus(counter); cpu++) {
1173                                 s2 = aggr_get_id(evsel_list->cpus, cpu);
1174                                 if (s2 != id)
1175                                         continue;
1176                                 val += perf_counts(counter->counts, cpu, 0)->val;
1177                         }
1178                         val = val * counter->scale;
1179                         perf_stat__update_shadow_stats(counter, &val,
1180                                                        first_shadow_cpu(counter, id));
1181                 }
1182         }
1183 }
1184
1185 static void print_aggr(char *prefix)
1186 {
1187         FILE *output = stat_config.output;
1188         struct perf_evsel *counter;
1189         int cpu, s, s2, id, nr;
1190         double uval;
1191         u64 ena, run, val;
1192         bool first;
1193
1194         if (!(aggr_map || aggr_get_id))
1195                 return;
1196
1197         aggr_update_shadow();
1198
1199         /*
1200          * With metric_only everything is on a single line.
1201          * Without each counter has its own line.
1202          */
1203         for (s = 0; s < aggr_map->nr; s++) {
1204                 if (prefix && metric_only)
1205                         fprintf(output, "%s", prefix);
1206
1207                 id = aggr_map->map[s];
1208                 first = true;
1209                 evlist__for_each_entry(evsel_list, counter) {
1210                         val = ena = run = 0;
1211                         nr = 0;
1212                         for (cpu = 0; cpu < perf_evsel__nr_cpus(counter); cpu++) {
1213                                 s2 = aggr_get_id(perf_evsel__cpus(counter), cpu);
1214                                 if (s2 != id)
1215                                         continue;
1216                                 val += perf_counts(counter->counts, cpu, 0)->val;
1217                                 ena += perf_counts(counter->counts, cpu, 0)->ena;
1218                                 run += perf_counts(counter->counts, cpu, 0)->run;
1219                                 nr++;
1220                         }
1221                         if (first && metric_only) {
1222                                 first = false;
1223                                 aggr_printout(counter, id, nr);
1224                         }
1225                         if (prefix && !metric_only)
1226                                 fprintf(output, "%s", prefix);
1227
1228                         uval = val * counter->scale;
1229                         printout(id, nr, counter, uval, prefix, run, ena, 1.0);
1230                         if (!metric_only)
1231                                 fputc('\n', output);
1232                 }
1233                 if (metric_only)
1234                         fputc('\n', output);
1235         }
1236 }
1237
1238 static void print_aggr_thread(struct perf_evsel *counter, char *prefix)
1239 {
1240         FILE *output = stat_config.output;
1241         int nthreads = thread_map__nr(counter->threads);
1242         int ncpus = cpu_map__nr(counter->cpus);
1243         int cpu, thread;
1244         double uval;
1245
1246         for (thread = 0; thread < nthreads; thread++) {
1247                 u64 ena = 0, run = 0, val = 0;
1248
1249                 for (cpu = 0; cpu < ncpus; cpu++) {
1250                         val += perf_counts(counter->counts, cpu, thread)->val;
1251                         ena += perf_counts(counter->counts, cpu, thread)->ena;
1252                         run += perf_counts(counter->counts, cpu, thread)->run;
1253                 }
1254
1255                 if (prefix)
1256                         fprintf(output, "%s", prefix);
1257
1258                 uval = val * counter->scale;
1259                 printout(thread, 0, counter, uval, prefix, run, ena, 1.0);
1260                 fputc('\n', output);
1261         }
1262 }
1263
1264 /*
1265  * Print out the results of a single counter:
1266  * aggregated counts in system-wide mode
1267  */
1268 static void print_counter_aggr(struct perf_evsel *counter, char *prefix)
1269 {
1270         FILE *output = stat_config.output;
1271         struct perf_stat_evsel *ps = counter->priv;
1272         double avg = avg_stats(&ps->res_stats[0]);
1273         double uval;
1274         double avg_enabled, avg_running;
1275
1276         avg_enabled = avg_stats(&ps->res_stats[1]);
1277         avg_running = avg_stats(&ps->res_stats[2]);
1278
1279         if (prefix && !metric_only)
1280                 fprintf(output, "%s", prefix);
1281
1282         uval = avg * counter->scale;
1283         printout(-1, 0, counter, uval, prefix, avg_running, avg_enabled, avg);
1284         if (!metric_only)
1285                 fprintf(output, "\n");
1286 }
1287
1288 /*
1289  * Print out the results of a single counter:
1290  * does not use aggregated count in system-wide
1291  */
1292 static void print_counter(struct perf_evsel *counter, char *prefix)
1293 {
1294         FILE *output = stat_config.output;
1295         u64 ena, run, val;
1296         double uval;
1297         int cpu;
1298
1299         for (cpu = 0; cpu < perf_evsel__nr_cpus(counter); cpu++) {
1300                 val = perf_counts(counter->counts, cpu, 0)->val;
1301                 ena = perf_counts(counter->counts, cpu, 0)->ena;
1302                 run = perf_counts(counter->counts, cpu, 0)->run;
1303
1304                 if (prefix)
1305                         fprintf(output, "%s", prefix);
1306
1307                 uval = val * counter->scale;
1308                 printout(cpu, 0, counter, uval, prefix, run, ena, 1.0);
1309
1310                 fputc('\n', output);
1311         }
1312 }
1313
1314 static void print_no_aggr_metric(char *prefix)
1315 {
1316         int cpu;
1317         int nrcpus = 0;
1318         struct perf_evsel *counter;
1319         u64 ena, run, val;
1320         double uval;
1321
1322         nrcpus = evsel_list->cpus->nr;
1323         for (cpu = 0; cpu < nrcpus; cpu++) {
1324                 bool first = true;
1325
1326                 if (prefix)
1327                         fputs(prefix, stat_config.output);
1328                 evlist__for_each_entry(evsel_list, counter) {
1329                         if (first) {
1330                                 aggr_printout(counter, cpu, 0);
1331                                 first = false;
1332                         }
1333                         val = perf_counts(counter->counts, cpu, 0)->val;
1334                         ena = perf_counts(counter->counts, cpu, 0)->ena;
1335                         run = perf_counts(counter->counts, cpu, 0)->run;
1336
1337                         uval = val * counter->scale;
1338                         printout(cpu, 0, counter, uval, prefix, run, ena, 1.0);
1339                 }
1340                 fputc('\n', stat_config.output);
1341         }
1342 }
1343
1344 static int aggr_header_lens[] = {
1345         [AGGR_CORE] = 18,
1346         [AGGR_SOCKET] = 12,
1347         [AGGR_NONE] = 6,
1348         [AGGR_THREAD] = 24,
1349         [AGGR_GLOBAL] = 0,
1350 };
1351
1352 static const char *aggr_header_csv[] = {
1353         [AGGR_CORE]     =       "core,cpus,",
1354         [AGGR_SOCKET]   =       "socket,cpus",
1355         [AGGR_NONE]     =       "cpu,",
1356         [AGGR_THREAD]   =       "comm-pid,",
1357         [AGGR_GLOBAL]   =       ""
1358 };
1359
1360 static void print_metric_headers(const char *prefix, bool no_indent)
1361 {
1362         struct perf_stat_output_ctx out;
1363         struct perf_evsel *counter;
1364         struct outstate os = {
1365                 .fh = stat_config.output
1366         };
1367
1368         if (prefix)
1369                 fprintf(stat_config.output, "%s", prefix);
1370
1371         if (!csv_output && !no_indent)
1372                 fprintf(stat_config.output, "%*s",
1373                         aggr_header_lens[stat_config.aggr_mode], "");
1374         if (csv_output) {
1375                 if (stat_config.interval)
1376                         fputs("time,", stat_config.output);
1377                 fputs(aggr_header_csv[stat_config.aggr_mode],
1378                         stat_config.output);
1379         }
1380
1381         /* Print metrics headers only */
1382         evlist__for_each_entry(evsel_list, counter) {
1383                 os.evsel = counter;
1384                 out.ctx = &os;
1385                 out.print_metric = print_metric_header;
1386                 out.new_line = new_line_metric;
1387                 os.evsel = counter;
1388                 perf_stat__print_shadow_stats(counter, 0,
1389                                               0,
1390                                               &out);
1391         }
1392         fputc('\n', stat_config.output);
1393 }
1394
1395 static void print_interval(char *prefix, struct timespec *ts)
1396 {
1397         FILE *output = stat_config.output;
1398         static int num_print_interval;
1399
1400         sprintf(prefix, "%6lu.%09lu%s", ts->tv_sec, ts->tv_nsec, csv_sep);
1401
1402         if (num_print_interval == 0 && !csv_output) {
1403                 switch (stat_config.aggr_mode) {
1404                 case AGGR_SOCKET:
1405                         fprintf(output, "#           time socket cpus");
1406                         if (!metric_only)
1407                                 fprintf(output, "             counts %*s events\n", unit_width, "unit");
1408                         break;
1409                 case AGGR_CORE:
1410                         fprintf(output, "#           time core         cpus");
1411                         if (!metric_only)
1412                                 fprintf(output, "             counts %*s events\n", unit_width, "unit");
1413                         break;
1414                 case AGGR_NONE:
1415                         fprintf(output, "#           time CPU");
1416                         if (!metric_only)
1417                                 fprintf(output, "                counts %*s events\n", unit_width, "unit");
1418                         break;
1419                 case AGGR_THREAD:
1420                         fprintf(output, "#           time             comm-pid");
1421                         if (!metric_only)
1422                                 fprintf(output, "                  counts %*s events\n", unit_width, "unit");
1423                         break;
1424                 case AGGR_GLOBAL:
1425                 default:
1426                         fprintf(output, "#           time");
1427                         if (!metric_only)
1428                                 fprintf(output, "             counts %*s events\n", unit_width, "unit");
1429                 case AGGR_UNSET:
1430                         break;
1431                 }
1432         }
1433
1434         if (num_print_interval == 0 && metric_only)
1435                 print_metric_headers(" ", true);
1436         if (++num_print_interval == 25)
1437                 num_print_interval = 0;
1438 }
1439
1440 static void print_header(int argc, const char **argv)
1441 {
1442         FILE *output = stat_config.output;
1443         int i;
1444
1445         fflush(stdout);
1446
1447         if (!csv_output) {
1448                 fprintf(output, "\n");
1449                 fprintf(output, " Performance counter stats for ");
1450                 if (target.system_wide)
1451                         fprintf(output, "\'system wide");
1452                 else if (target.cpu_list)
1453                         fprintf(output, "\'CPU(s) %s", target.cpu_list);
1454                 else if (!target__has_task(&target)) {
1455                         fprintf(output, "\'%s", argv ? argv[0] : "pipe");
1456                         for (i = 1; argv && (i < argc); i++)
1457                                 fprintf(output, " %s", argv[i]);
1458                 } else if (target.pid)
1459                         fprintf(output, "process id \'%s", target.pid);
1460                 else
1461                         fprintf(output, "thread id \'%s", target.tid);
1462
1463                 fprintf(output, "\'");
1464                 if (run_count > 1)
1465                         fprintf(output, " (%d runs)", run_count);
1466                 fprintf(output, ":\n\n");
1467         }
1468 }
1469
1470 static void print_footer(void)
1471 {
1472         FILE *output = stat_config.output;
1473
1474         if (!null_run)
1475                 fprintf(output, "\n");
1476         fprintf(output, " %17.9f seconds time elapsed",
1477                         avg_stats(&walltime_nsecs_stats) / NSEC_PER_SEC);
1478         if (run_count > 1) {
1479                 fprintf(output, "                                        ");
1480                 print_noise_pct(stddev_stats(&walltime_nsecs_stats),
1481                                 avg_stats(&walltime_nsecs_stats));
1482         }
1483         fprintf(output, "\n\n");
1484
1485         if (print_free_counters_hint)
1486                 fprintf(output,
1487 "Some events weren't counted. Try disabling the NMI watchdog:\n"
1488 "       echo 0 > /proc/sys/kernel/nmi_watchdog\n"
1489 "       perf stat ...\n"
1490 "       echo 1 > /proc/sys/kernel/nmi_watchdog\n");
1491 }
1492
1493 static void print_counters(struct timespec *ts, int argc, const char **argv)
1494 {
1495         int interval = stat_config.interval;
1496         struct perf_evsel *counter;
1497         char buf[64], *prefix = NULL;
1498
1499         /* Do not print anything if we record to the pipe. */
1500         if (STAT_RECORD && perf_stat.file.is_pipe)
1501                 return;
1502
1503         if (interval)
1504                 print_interval(prefix = buf, ts);
1505         else
1506                 print_header(argc, argv);
1507
1508         if (metric_only) {
1509                 static int num_print_iv;
1510
1511                 if (num_print_iv == 0 && !interval)
1512                         print_metric_headers(prefix, false);
1513                 if (num_print_iv++ == 25)
1514                         num_print_iv = 0;
1515                 if (stat_config.aggr_mode == AGGR_GLOBAL && prefix)
1516                         fprintf(stat_config.output, "%s", prefix);
1517         }
1518
1519         switch (stat_config.aggr_mode) {
1520         case AGGR_CORE:
1521         case AGGR_SOCKET:
1522                 print_aggr(prefix);
1523                 break;
1524         case AGGR_THREAD:
1525                 evlist__for_each_entry(evsel_list, counter)
1526                         print_aggr_thread(counter, prefix);
1527                 break;
1528         case AGGR_GLOBAL:
1529                 evlist__for_each_entry(evsel_list, counter)
1530                         print_counter_aggr(counter, prefix);
1531                 if (metric_only)
1532                         fputc('\n', stat_config.output);
1533                 break;
1534         case AGGR_NONE:
1535                 if (metric_only)
1536                         print_no_aggr_metric(prefix);
1537                 else {
1538                         evlist__for_each_entry(evsel_list, counter)
1539                                 print_counter(counter, prefix);
1540                 }
1541                 break;
1542         case AGGR_UNSET:
1543         default:
1544                 break;
1545         }
1546
1547         if (!interval && !csv_output)
1548                 print_footer();
1549
1550         fflush(stat_config.output);
1551 }
1552
1553 static volatile int signr = -1;
1554
1555 static void skip_signal(int signo)
1556 {
1557         if ((child_pid == -1) || stat_config.interval)
1558                 done = 1;
1559
1560         signr = signo;
1561         /*
1562          * render child_pid harmless
1563          * won't send SIGTERM to a random
1564          * process in case of race condition
1565          * and fast PID recycling
1566          */
1567         child_pid = -1;
1568 }
1569
1570 static void sig_atexit(void)
1571 {
1572         sigset_t set, oset;
1573
1574         /*
1575          * avoid race condition with SIGCHLD handler
1576          * in skip_signal() which is modifying child_pid
1577          * goal is to avoid send SIGTERM to a random
1578          * process
1579          */
1580         sigemptyset(&set);
1581         sigaddset(&set, SIGCHLD);
1582         sigprocmask(SIG_BLOCK, &set, &oset);
1583
1584         if (child_pid != -1)
1585                 kill(child_pid, SIGTERM);
1586
1587         sigprocmask(SIG_SETMASK, &oset, NULL);
1588
1589         if (signr == -1)
1590                 return;
1591
1592         signal(signr, SIG_DFL);
1593         kill(getpid(), signr);
1594 }
1595
1596 static int stat__set_big_num(const struct option *opt __maybe_unused,
1597                              const char *s __maybe_unused, int unset)
1598 {
1599         big_num_opt = unset ? 0 : 1;
1600         return 0;
1601 }
1602
1603 static int enable_metric_only(const struct option *opt __maybe_unused,
1604                               const char *s __maybe_unused, int unset)
1605 {
1606         force_metric_only = true;
1607         metric_only = !unset;
1608         return 0;
1609 }
1610
1611 static const struct option stat_options[] = {
1612         OPT_BOOLEAN('T', "transaction", &transaction_run,
1613                     "hardware transaction statistics"),
1614         OPT_CALLBACK('e', "event", &evsel_list, "event",
1615                      "event selector. use 'perf list' to list available events",
1616                      parse_events_option),
1617         OPT_CALLBACK(0, "filter", &evsel_list, "filter",
1618                      "event filter", parse_filter),
1619         OPT_BOOLEAN('i', "no-inherit", &no_inherit,
1620                     "child tasks do not inherit counters"),
1621         OPT_STRING('p', "pid", &target.pid, "pid",
1622                    "stat events on existing process id"),
1623         OPT_STRING('t', "tid", &target.tid, "tid",
1624                    "stat events on existing thread id"),
1625         OPT_BOOLEAN('a', "all-cpus", &target.system_wide,
1626                     "system-wide collection from all CPUs"),
1627         OPT_BOOLEAN('g', "group", &group,
1628                     "put the counters into a counter group"),
1629         OPT_BOOLEAN('c', "scale", &stat_config.scale, "scale/normalize counters"),
1630         OPT_INCR('v', "verbose", &verbose,
1631                     "be more verbose (show counter open errors, etc)"),
1632         OPT_INTEGER('r', "repeat", &run_count,
1633                     "repeat command and print average + stddev (max: 100, forever: 0)"),
1634         OPT_BOOLEAN('n', "null", &null_run,
1635                     "null run - dont start any counters"),
1636         OPT_INCR('d', "detailed", &detailed_run,
1637                     "detailed run - start a lot of events"),
1638         OPT_BOOLEAN('S', "sync", &sync_run,
1639                     "call sync() before starting a run"),
1640         OPT_CALLBACK_NOOPT('B', "big-num", NULL, NULL,
1641                            "print large numbers with thousands\' separators",
1642                            stat__set_big_num),
1643         OPT_STRING('C', "cpu", &target.cpu_list, "cpu",
1644                     "list of cpus to monitor in system-wide"),
1645         OPT_SET_UINT('A', "no-aggr", &stat_config.aggr_mode,
1646                     "disable CPU count aggregation", AGGR_NONE),
1647         OPT_STRING('x', "field-separator", &csv_sep, "separator",
1648                    "print counts with custom separator"),
1649         OPT_CALLBACK('G', "cgroup", &evsel_list, "name",
1650                      "monitor event in cgroup name only", parse_cgroups),
1651         OPT_STRING('o', "output", &output_name, "file", "output file name"),
1652         OPT_BOOLEAN(0, "append", &append_file, "append to the output file"),
1653         OPT_INTEGER(0, "log-fd", &output_fd,
1654                     "log output to fd, instead of stderr"),
1655         OPT_STRING(0, "pre", &pre_cmd, "command",
1656                         "command to run prior to the measured command"),
1657         OPT_STRING(0, "post", &post_cmd, "command",
1658                         "command to run after to the measured command"),
1659         OPT_UINTEGER('I', "interval-print", &stat_config.interval,
1660                     "print counts at regular interval in ms (>= 10)"),
1661         OPT_SET_UINT(0, "per-socket", &stat_config.aggr_mode,
1662                      "aggregate counts per processor socket", AGGR_SOCKET),
1663         OPT_SET_UINT(0, "per-core", &stat_config.aggr_mode,
1664                      "aggregate counts per physical processor core", AGGR_CORE),
1665         OPT_SET_UINT(0, "per-thread", &stat_config.aggr_mode,
1666                      "aggregate counts per thread", AGGR_THREAD),
1667         OPT_UINTEGER('D', "delay", &initial_delay,
1668                      "ms to wait before starting measurement after program start"),
1669         OPT_CALLBACK_NOOPT(0, "metric-only", &metric_only, NULL,
1670                         "Only print computed metrics. No raw values", enable_metric_only),
1671         OPT_BOOLEAN(0, "topdown", &topdown_run,
1672                         "measure topdown level 1 statistics"),
1673         OPT_END()
1674 };
1675
1676 static int perf_stat__get_socket(struct cpu_map *map, int cpu)
1677 {
1678         return cpu_map__get_socket(map, cpu, NULL);
1679 }
1680
1681 static int perf_stat__get_core(struct cpu_map *map, int cpu)
1682 {
1683         return cpu_map__get_core(map, cpu, NULL);
1684 }
1685
1686 static int cpu_map__get_max(struct cpu_map *map)
1687 {
1688         int i, max = -1;
1689
1690         for (i = 0; i < map->nr; i++) {
1691                 if (map->map[i] > max)
1692                         max = map->map[i];
1693         }
1694
1695         return max;
1696 }
1697
1698 static struct cpu_map *cpus_aggr_map;
1699
1700 static int perf_stat__get_aggr(aggr_get_id_t get_id, struct cpu_map *map, int idx)
1701 {
1702         int cpu;
1703
1704         if (idx >= map->nr)
1705                 return -1;
1706
1707         cpu = map->map[idx];
1708
1709         if (cpus_aggr_map->map[cpu] == -1)
1710                 cpus_aggr_map->map[cpu] = get_id(map, idx);
1711
1712         return cpus_aggr_map->map[cpu];
1713 }
1714
1715 static int perf_stat__get_socket_cached(struct cpu_map *map, int idx)
1716 {
1717         return perf_stat__get_aggr(perf_stat__get_socket, map, idx);
1718 }
1719
1720 static int perf_stat__get_core_cached(struct cpu_map *map, int idx)
1721 {
1722         return perf_stat__get_aggr(perf_stat__get_core, map, idx);
1723 }
1724
1725 static int perf_stat_init_aggr_mode(void)
1726 {
1727         int nr;
1728
1729         switch (stat_config.aggr_mode) {
1730         case AGGR_SOCKET:
1731                 if (cpu_map__build_socket_map(evsel_list->cpus, &aggr_map)) {
1732                         perror("cannot build socket map");
1733                         return -1;
1734                 }
1735                 aggr_get_id = perf_stat__get_socket_cached;
1736                 break;
1737         case AGGR_CORE:
1738                 if (cpu_map__build_core_map(evsel_list->cpus, &aggr_map)) {
1739                         perror("cannot build core map");
1740                         return -1;
1741                 }
1742                 aggr_get_id = perf_stat__get_core_cached;
1743                 break;
1744         case AGGR_NONE:
1745         case AGGR_GLOBAL:
1746         case AGGR_THREAD:
1747         case AGGR_UNSET:
1748         default:
1749                 break;
1750         }
1751
1752         /*
1753          * The evsel_list->cpus is the base we operate on,
1754          * taking the highest cpu number to be the size of
1755          * the aggregation translate cpumap.
1756          */
1757         nr = cpu_map__get_max(evsel_list->cpus);
1758         cpus_aggr_map = cpu_map__empty_new(nr + 1);
1759         return cpus_aggr_map ? 0 : -ENOMEM;
1760 }
1761
1762 static void perf_stat__exit_aggr_mode(void)
1763 {
1764         cpu_map__put(aggr_map);
1765         cpu_map__put(cpus_aggr_map);
1766         aggr_map = NULL;
1767         cpus_aggr_map = NULL;
1768 }
1769
1770 static inline int perf_env__get_cpu(struct perf_env *env, struct cpu_map *map, int idx)
1771 {
1772         int cpu;
1773
1774         if (idx > map->nr)
1775                 return -1;
1776
1777         cpu = map->map[idx];
1778
1779         if (cpu >= env->nr_cpus_avail)
1780                 return -1;
1781
1782         return cpu;
1783 }
1784
1785 static int perf_env__get_socket(struct cpu_map *map, int idx, void *data)
1786 {
1787         struct perf_env *env = data;
1788         int cpu = perf_env__get_cpu(env, map, idx);
1789
1790         return cpu == -1 ? -1 : env->cpu[cpu].socket_id;
1791 }
1792
1793 static int perf_env__get_core(struct cpu_map *map, int idx, void *data)
1794 {
1795         struct perf_env *env = data;
1796         int core = -1, cpu = perf_env__get_cpu(env, map, idx);
1797
1798         if (cpu != -1) {
1799                 int socket_id = env->cpu[cpu].socket_id;
1800
1801                 /*
1802                  * Encode socket in upper 16 bits
1803                  * core_id is relative to socket, and
1804                  * we need a global id. So we combine
1805                  * socket + core id.
1806                  */
1807                 core = (socket_id << 16) | (env->cpu[cpu].core_id & 0xffff);
1808         }
1809
1810         return core;
1811 }
1812
1813 static int perf_env__build_socket_map(struct perf_env *env, struct cpu_map *cpus,
1814                                       struct cpu_map **sockp)
1815 {
1816         return cpu_map__build_map(cpus, sockp, perf_env__get_socket, env);
1817 }
1818
1819 static int perf_env__build_core_map(struct perf_env *env, struct cpu_map *cpus,
1820                                     struct cpu_map **corep)
1821 {
1822         return cpu_map__build_map(cpus, corep, perf_env__get_core, env);
1823 }
1824
1825 static int perf_stat__get_socket_file(struct cpu_map *map, int idx)
1826 {
1827         return perf_env__get_socket(map, idx, &perf_stat.session->header.env);
1828 }
1829
1830 static int perf_stat__get_core_file(struct cpu_map *map, int idx)
1831 {
1832         return perf_env__get_core(map, idx, &perf_stat.session->header.env);
1833 }
1834
1835 static int perf_stat_init_aggr_mode_file(struct perf_stat *st)
1836 {
1837         struct perf_env *env = &st->session->header.env;
1838
1839         switch (stat_config.aggr_mode) {
1840         case AGGR_SOCKET:
1841                 if (perf_env__build_socket_map(env, evsel_list->cpus, &aggr_map)) {
1842                         perror("cannot build socket map");
1843                         return -1;
1844                 }
1845                 aggr_get_id = perf_stat__get_socket_file;
1846                 break;
1847         case AGGR_CORE:
1848                 if (perf_env__build_core_map(env, evsel_list->cpus, &aggr_map)) {
1849                         perror("cannot build core map");
1850                         return -1;
1851                 }
1852                 aggr_get_id = perf_stat__get_core_file;
1853                 break;
1854         case AGGR_NONE:
1855         case AGGR_GLOBAL:
1856         case AGGR_THREAD:
1857         case AGGR_UNSET:
1858         default:
1859                 break;
1860         }
1861
1862         return 0;
1863 }
1864
1865 static int topdown_filter_events(const char **attr, char **str, bool use_group)
1866 {
1867         int off = 0;
1868         int i;
1869         int len = 0;
1870         char *s;
1871
1872         for (i = 0; attr[i]; i++) {
1873                 if (pmu_have_event("cpu", attr[i])) {
1874                         len += strlen(attr[i]) + 1;
1875                         attr[i - off] = attr[i];
1876                 } else
1877                         off++;
1878         }
1879         attr[i - off] = NULL;
1880
1881         *str = malloc(len + 1 + 2);
1882         if (!*str)
1883                 return -1;
1884         s = *str;
1885         if (i - off == 0) {
1886                 *s = 0;
1887                 return 0;
1888         }
1889         if (use_group)
1890                 *s++ = '{';
1891         for (i = 0; attr[i]; i++) {
1892                 strcpy(s, attr[i]);
1893                 s += strlen(s);
1894                 *s++ = ',';
1895         }
1896         if (use_group) {
1897                 s[-1] = '}';
1898                 *s = 0;
1899         } else
1900                 s[-1] = 0;
1901         return 0;
1902 }
1903
1904 __weak bool arch_topdown_check_group(bool *warn)
1905 {
1906         *warn = false;
1907         return false;
1908 }
1909
1910 __weak void arch_topdown_group_warn(void)
1911 {
1912 }
1913
1914 /*
1915  * Add default attributes, if there were no attributes specified or
1916  * if -d/--detailed, -d -d or -d -d -d is used:
1917  */
1918 static int add_default_attributes(void)
1919 {
1920         int err;
1921         struct perf_event_attr default_attrs0[] = {
1922
1923   { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_TASK_CLOCK              },
1924   { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_CONTEXT_SWITCHES        },
1925   { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_CPU_MIGRATIONS          },
1926   { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_PAGE_FAULTS             },
1927
1928   { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_CPU_CYCLES              },
1929 };
1930         struct perf_event_attr frontend_attrs[] = {
1931   { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_STALLED_CYCLES_FRONTEND },
1932 };
1933         struct perf_event_attr backend_attrs[] = {
1934   { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_STALLED_CYCLES_BACKEND  },
1935 };
1936         struct perf_event_attr default_attrs1[] = {
1937   { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_INSTRUCTIONS            },
1938   { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_BRANCH_INSTRUCTIONS     },
1939   { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_BRANCH_MISSES           },
1940
1941 };
1942
1943 /*
1944  * Detailed stats (-d), covering the L1 and last level data caches:
1945  */
1946         struct perf_event_attr detailed_attrs[] = {
1947
1948   { .type = PERF_TYPE_HW_CACHE,
1949     .config =
1950          PERF_COUNT_HW_CACHE_L1D                <<  0  |
1951         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
1952         (PERF_COUNT_HW_CACHE_RESULT_ACCESS      << 16)                          },
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_MISS        << 16)                          },
1959
1960   { .type = PERF_TYPE_HW_CACHE,
1961     .config =
1962          PERF_COUNT_HW_CACHE_LL                 <<  0  |
1963         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
1964         (PERF_COUNT_HW_CACHE_RESULT_ACCESS      << 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_MISS        << 16)                          },
1971 };
1972
1973 /*
1974  * Very detailed stats (-d -d), covering the instruction cache and the TLB caches:
1975  */
1976         struct perf_event_attr very_detailed_attrs[] = {
1977
1978   { .type = PERF_TYPE_HW_CACHE,
1979     .config =
1980          PERF_COUNT_HW_CACHE_L1I                <<  0  |
1981         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
1982         (PERF_COUNT_HW_CACHE_RESULT_ACCESS      << 16)                          },
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_MISS        << 16)                          },
1989
1990   { .type = PERF_TYPE_HW_CACHE,
1991     .config =
1992          PERF_COUNT_HW_CACHE_DTLB               <<  0  |
1993         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
1994         (PERF_COUNT_HW_CACHE_RESULT_ACCESS      << 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_MISS        << 16)                          },
2001
2002   { .type = PERF_TYPE_HW_CACHE,
2003     .config =
2004          PERF_COUNT_HW_CACHE_ITLB               <<  0  |
2005         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
2006         (PERF_COUNT_HW_CACHE_RESULT_ACCESS      << 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_MISS        << 16)                          },
2013
2014 };
2015
2016 /*
2017  * Very, very detailed stats (-d -d -d), adding prefetch events:
2018  */
2019         struct perf_event_attr very_very_detailed_attrs[] = {
2020
2021   { .type = PERF_TYPE_HW_CACHE,
2022     .config =
2023          PERF_COUNT_HW_CACHE_L1D                <<  0  |
2024         (PERF_COUNT_HW_CACHE_OP_PREFETCH        <<  8) |
2025         (PERF_COUNT_HW_CACHE_RESULT_ACCESS      << 16)                          },
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_MISS        << 16)                          },
2032 };
2033
2034         /* Set attrs if no event is selected and !null_run: */
2035         if (null_run)
2036                 return 0;
2037
2038         if (transaction_run) {
2039                 if (pmu_have_event("cpu", "cycles-ct") &&
2040                     pmu_have_event("cpu", "el-start"))
2041                         err = parse_events(evsel_list, transaction_attrs, NULL);
2042                 else
2043                         err = parse_events(evsel_list, transaction_limited_attrs, NULL);
2044                 if (err) {
2045                         fprintf(stderr, "Cannot set up transaction events\n");
2046                         return -1;
2047                 }
2048                 return 0;
2049         }
2050
2051         if (topdown_run) {
2052                 char *str = NULL;
2053                 bool warn = false;
2054
2055                 if (stat_config.aggr_mode != AGGR_GLOBAL &&
2056                     stat_config.aggr_mode != AGGR_CORE) {
2057                         pr_err("top down event configuration requires --per-core mode\n");
2058                         return -1;
2059                 }
2060                 stat_config.aggr_mode = AGGR_CORE;
2061                 if (nr_cgroups || !target__has_cpu(&target)) {
2062                         pr_err("top down event configuration requires system-wide mode (-a)\n");
2063                         return -1;
2064                 }
2065
2066                 if (!force_metric_only)
2067                         metric_only = true;
2068                 if (topdown_filter_events(topdown_attrs, &str,
2069                                 arch_topdown_check_group(&warn)) < 0) {
2070                         pr_err("Out of memory\n");
2071                         return -1;
2072                 }
2073                 if (topdown_attrs[0] && str) {
2074                         if (warn)
2075                                 arch_topdown_group_warn();
2076                         err = parse_events(evsel_list, str, NULL);
2077                         if (err) {
2078                                 fprintf(stderr,
2079                                         "Cannot set up top down events %s: %d\n",
2080                                         str, err);
2081                                 free(str);
2082                                 return -1;
2083                         }
2084                 } else {
2085                         fprintf(stderr, "System does not support topdown\n");
2086                         return -1;
2087                 }
2088                 free(str);
2089         }
2090
2091         if (!evsel_list->nr_entries) {
2092                 if (target__has_cpu(&target))
2093                         default_attrs0[0].config = PERF_COUNT_SW_CPU_CLOCK;
2094
2095                 if (perf_evlist__add_default_attrs(evsel_list, default_attrs0) < 0)
2096                         return -1;
2097                 if (pmu_have_event("cpu", "stalled-cycles-frontend")) {
2098                         if (perf_evlist__add_default_attrs(evsel_list,
2099                                                 frontend_attrs) < 0)
2100                                 return -1;
2101                 }
2102                 if (pmu_have_event("cpu", "stalled-cycles-backend")) {
2103                         if (perf_evlist__add_default_attrs(evsel_list,
2104                                                 backend_attrs) < 0)
2105                                 return -1;
2106                 }
2107                 if (perf_evlist__add_default_attrs(evsel_list, default_attrs1) < 0)
2108                         return -1;
2109         }
2110
2111         /* Detailed events get appended to the event list: */
2112
2113         if (detailed_run <  1)
2114                 return 0;
2115
2116         /* Append detailed run extra attributes: */
2117         if (perf_evlist__add_default_attrs(evsel_list, detailed_attrs) < 0)
2118                 return -1;
2119
2120         if (detailed_run < 2)
2121                 return 0;
2122
2123         /* Append very detailed run extra attributes: */
2124         if (perf_evlist__add_default_attrs(evsel_list, very_detailed_attrs) < 0)
2125                 return -1;
2126
2127         if (detailed_run < 3)
2128                 return 0;
2129
2130         /* Append very, very detailed run extra attributes: */
2131         return perf_evlist__add_default_attrs(evsel_list, very_very_detailed_attrs);
2132 }
2133
2134 static const char * const stat_record_usage[] = {
2135         "perf stat record [<options>]",
2136         NULL,
2137 };
2138
2139 static void init_features(struct perf_session *session)
2140 {
2141         int feat;
2142
2143         for (feat = HEADER_FIRST_FEATURE; feat < HEADER_LAST_FEATURE; feat++)
2144                 perf_header__set_feat(&session->header, feat);
2145
2146         perf_header__clear_feat(&session->header, HEADER_BUILD_ID);
2147         perf_header__clear_feat(&session->header, HEADER_TRACING_DATA);
2148         perf_header__clear_feat(&session->header, HEADER_BRANCH_STACK);
2149         perf_header__clear_feat(&session->header, HEADER_AUXTRACE);
2150 }
2151
2152 static int __cmd_record(int argc, const char **argv)
2153 {
2154         struct perf_session *session;
2155         struct perf_data_file *file = &perf_stat.file;
2156
2157         argc = parse_options(argc, argv, stat_options, stat_record_usage,
2158                              PARSE_OPT_STOP_AT_NON_OPTION);
2159
2160         if (output_name)
2161                 file->path = output_name;
2162
2163         if (run_count != 1 || forever) {
2164                 pr_err("Cannot use -r option with perf stat record.\n");
2165                 return -1;
2166         }
2167
2168         session = perf_session__new(file, false, NULL);
2169         if (session == NULL) {
2170                 pr_err("Perf session creation failed.\n");
2171                 return -1;
2172         }
2173
2174         init_features(session);
2175
2176         session->evlist   = evsel_list;
2177         perf_stat.session = session;
2178         perf_stat.record  = true;
2179         return argc;
2180 }
2181
2182 static int process_stat_round_event(struct perf_tool *tool __maybe_unused,
2183                                     union perf_event *event,
2184                                     struct perf_session *session)
2185 {
2186         struct stat_round_event *stat_round = &event->stat_round;
2187         struct perf_evsel *counter;
2188         struct timespec tsh, *ts = NULL;
2189         const char **argv = session->header.env.cmdline_argv;
2190         int argc = session->header.env.nr_cmdline;
2191
2192         evlist__for_each_entry(evsel_list, counter)
2193                 perf_stat_process_counter(&stat_config, counter);
2194
2195         if (stat_round->type == PERF_STAT_ROUND_TYPE__FINAL)
2196                 update_stats(&walltime_nsecs_stats, stat_round->time);
2197
2198         if (stat_config.interval && stat_round->time) {
2199                 tsh.tv_sec  = stat_round->time / NSEC_PER_SEC;
2200                 tsh.tv_nsec = stat_round->time % NSEC_PER_SEC;
2201                 ts = &tsh;
2202         }
2203
2204         print_counters(ts, argc, argv);
2205         return 0;
2206 }
2207
2208 static
2209 int process_stat_config_event(struct perf_tool *tool,
2210                               union perf_event *event,
2211                               struct perf_session *session __maybe_unused)
2212 {
2213         struct perf_stat *st = container_of(tool, struct perf_stat, tool);
2214
2215         perf_event__read_stat_config(&stat_config, &event->stat_config);
2216
2217         if (cpu_map__empty(st->cpus)) {
2218                 if (st->aggr_mode != AGGR_UNSET)
2219                         pr_warning("warning: processing task data, aggregation mode not set\n");
2220                 return 0;
2221         }
2222
2223         if (st->aggr_mode != AGGR_UNSET)
2224                 stat_config.aggr_mode = st->aggr_mode;
2225
2226         if (perf_stat.file.is_pipe)
2227                 perf_stat_init_aggr_mode();
2228         else
2229                 perf_stat_init_aggr_mode_file(st);
2230
2231         return 0;
2232 }
2233
2234 static int set_maps(struct perf_stat *st)
2235 {
2236         if (!st->cpus || !st->threads)
2237                 return 0;
2238
2239         if (WARN_ONCE(st->maps_allocated, "stats double allocation\n"))
2240                 return -EINVAL;
2241
2242         perf_evlist__set_maps(evsel_list, st->cpus, st->threads);
2243
2244         if (perf_evlist__alloc_stats(evsel_list, true))
2245                 return -ENOMEM;
2246
2247         st->maps_allocated = true;
2248         return 0;
2249 }
2250
2251 static
2252 int process_thread_map_event(struct perf_tool *tool,
2253                              union perf_event *event,
2254                              struct perf_session *session __maybe_unused)
2255 {
2256         struct perf_stat *st = container_of(tool, struct perf_stat, tool);
2257
2258         if (st->threads) {
2259                 pr_warning("Extra thread map event, ignoring.\n");
2260                 return 0;
2261         }
2262
2263         st->threads = thread_map__new_event(&event->thread_map);
2264         if (!st->threads)
2265                 return -ENOMEM;
2266
2267         return set_maps(st);
2268 }
2269
2270 static
2271 int process_cpu_map_event(struct perf_tool *tool,
2272                           union perf_event *event,
2273                           struct perf_session *session __maybe_unused)
2274 {
2275         struct perf_stat *st = container_of(tool, struct perf_stat, tool);
2276         struct cpu_map *cpus;
2277
2278         if (st->cpus) {
2279                 pr_warning("Extra cpu map event, ignoring.\n");
2280                 return 0;
2281         }
2282
2283         cpus = cpu_map__new_data(&event->cpu_map.data);
2284         if (!cpus)
2285                 return -ENOMEM;
2286
2287         st->cpus = cpus;
2288         return set_maps(st);
2289 }
2290
2291 static const char * const stat_report_usage[] = {
2292         "perf stat report [<options>]",
2293         NULL,
2294 };
2295
2296 static struct perf_stat perf_stat = {
2297         .tool = {
2298                 .attr           = perf_event__process_attr,
2299                 .event_update   = perf_event__process_event_update,
2300                 .thread_map     = process_thread_map_event,
2301                 .cpu_map        = process_cpu_map_event,
2302                 .stat_config    = process_stat_config_event,
2303                 .stat           = perf_event__process_stat_event,
2304                 .stat_round     = process_stat_round_event,
2305         },
2306         .aggr_mode = AGGR_UNSET,
2307 };
2308
2309 static int __cmd_report(int argc, const char **argv)
2310 {
2311         struct perf_session *session;
2312         const struct option options[] = {
2313         OPT_STRING('i', "input", &input_name, "file", "input file name"),
2314         OPT_SET_UINT(0, "per-socket", &perf_stat.aggr_mode,
2315                      "aggregate counts per processor socket", AGGR_SOCKET),
2316         OPT_SET_UINT(0, "per-core", &perf_stat.aggr_mode,
2317                      "aggregate counts per physical processor core", AGGR_CORE),
2318         OPT_SET_UINT('A', "no-aggr", &perf_stat.aggr_mode,
2319                      "disable CPU count aggregation", AGGR_NONE),
2320         OPT_END()
2321         };
2322         struct stat st;
2323         int ret;
2324
2325         argc = parse_options(argc, argv, options, stat_report_usage, 0);
2326
2327         if (!input_name || !strlen(input_name)) {
2328                 if (!fstat(STDIN_FILENO, &st) && S_ISFIFO(st.st_mode))
2329                         input_name = "-";
2330                 else
2331                         input_name = "perf.data";
2332         }
2333
2334         perf_stat.file.path = input_name;
2335         perf_stat.file.mode = PERF_DATA_MODE_READ;
2336
2337         session = perf_session__new(&perf_stat.file, false, &perf_stat.tool);
2338         if (session == NULL)
2339                 return -1;
2340
2341         perf_stat.session  = session;
2342         stat_config.output = stderr;
2343         evsel_list         = session->evlist;
2344
2345         ret = perf_session__process_events(session);
2346         if (ret)
2347                 return ret;
2348
2349         perf_session__delete(session);
2350         return 0;
2351 }
2352
2353 static void setup_system_wide(int forks)
2354 {
2355         /*
2356          * Make system wide (-a) the default target if
2357          * no target was specified and one of following
2358          * conditions is met:
2359          *
2360          *   - there's no workload specified
2361          *   - there is workload specified but all requested
2362          *     events are system wide events
2363          */
2364         if (!target__none(&target))
2365                 return;
2366
2367         if (!forks)
2368                 target.system_wide = true;
2369         else {
2370                 struct perf_evsel *counter;
2371
2372                 evlist__for_each_entry(evsel_list, counter) {
2373                         if (!counter->system_wide)
2374                                 return;
2375                 }
2376
2377                 if (evsel_list->nr_entries)
2378                         target.system_wide = true;
2379         }
2380 }
2381
2382 int cmd_stat(int argc, const char **argv, const char *prefix __maybe_unused)
2383 {
2384         const char * const stat_usage[] = {
2385                 "perf stat [<options>] [<command>]",
2386                 NULL
2387         };
2388         int status = -EINVAL, run_idx;
2389         const char *mode;
2390         FILE *output = stderr;
2391         unsigned int interval;
2392         const char * const stat_subcommands[] = { "record", "report" };
2393
2394         setlocale(LC_ALL, "");
2395
2396         evsel_list = perf_evlist__new();
2397         if (evsel_list == NULL)
2398                 return -ENOMEM;
2399
2400         parse_events__shrink_config_terms();
2401         argc = parse_options_subcommand(argc, argv, stat_options, stat_subcommands,
2402                                         (const char **) stat_usage,
2403                                         PARSE_OPT_STOP_AT_NON_OPTION);
2404         perf_stat__init_shadow_stats();
2405
2406         if (csv_sep) {
2407                 csv_output = true;
2408                 if (!strcmp(csv_sep, "\\t"))
2409                         csv_sep = "\t";
2410         } else
2411                 csv_sep = DEFAULT_SEPARATOR;
2412
2413         if (argc && !strncmp(argv[0], "rec", 3)) {
2414                 argc = __cmd_record(argc, argv);
2415                 if (argc < 0)
2416                         return -1;
2417         } else if (argc && !strncmp(argv[0], "rep", 3))
2418                 return __cmd_report(argc, argv);
2419
2420         interval = stat_config.interval;
2421
2422         /*
2423          * For record command the -o is already taken care of.
2424          */
2425         if (!STAT_RECORD && output_name && strcmp(output_name, "-"))
2426                 output = NULL;
2427
2428         if (output_name && output_fd) {
2429                 fprintf(stderr, "cannot use both --output and --log-fd\n");
2430                 parse_options_usage(stat_usage, stat_options, "o", 1);
2431                 parse_options_usage(NULL, stat_options, "log-fd", 0);
2432                 goto out;
2433         }
2434
2435         if (metric_only && stat_config.aggr_mode == AGGR_THREAD) {
2436                 fprintf(stderr, "--metric-only is not supported with --per-thread\n");
2437                 goto out;
2438         }
2439
2440         if (metric_only && run_count > 1) {
2441                 fprintf(stderr, "--metric-only is not supported with -r\n");
2442                 goto out;
2443         }
2444
2445         if (output_fd < 0) {
2446                 fprintf(stderr, "argument to --log-fd must be a > 0\n");
2447                 parse_options_usage(stat_usage, stat_options, "log-fd", 0);
2448                 goto out;
2449         }
2450
2451         if (!output) {
2452                 struct timespec tm;
2453                 mode = append_file ? "a" : "w";
2454
2455                 output = fopen(output_name, mode);
2456                 if (!output) {
2457                         perror("failed to create output file");
2458                         return -1;
2459                 }
2460                 clock_gettime(CLOCK_REALTIME, &tm);
2461                 fprintf(output, "# started on %s\n", ctime(&tm.tv_sec));
2462         } else if (output_fd > 0) {
2463                 mode = append_file ? "a" : "w";
2464                 output = fdopen(output_fd, mode);
2465                 if (!output) {
2466                         perror("Failed opening logfd");
2467                         return -errno;
2468                 }
2469         }
2470
2471         stat_config.output = output;
2472
2473         /*
2474          * let the spreadsheet do the pretty-printing
2475          */
2476         if (csv_output) {
2477                 /* User explicitly passed -B? */
2478                 if (big_num_opt == 1) {
2479                         fprintf(stderr, "-B option not supported with -x\n");
2480                         parse_options_usage(stat_usage, stat_options, "B", 1);
2481                         parse_options_usage(NULL, stat_options, "x", 1);
2482                         goto out;
2483                 } else /* Nope, so disable big number formatting */
2484                         big_num = false;
2485         } else if (big_num_opt == 0) /* User passed --no-big-num */
2486                 big_num = false;
2487
2488         setup_system_wide(argc);
2489
2490         if (run_count < 0) {
2491                 pr_err("Run count must be a positive number\n");
2492                 parse_options_usage(stat_usage, stat_options, "r", 1);
2493                 goto out;
2494         } else if (run_count == 0) {
2495                 forever = true;
2496                 run_count = 1;
2497         }
2498
2499         if ((stat_config.aggr_mode == AGGR_THREAD) && !target__has_task(&target)) {
2500                 fprintf(stderr, "The --per-thread option is only available "
2501                         "when monitoring via -p -t options.\n");
2502                 parse_options_usage(NULL, stat_options, "p", 1);
2503                 parse_options_usage(NULL, stat_options, "t", 1);
2504                 goto out;
2505         }
2506
2507         /*
2508          * no_aggr, cgroup are for system-wide only
2509          * --per-thread is aggregated per thread, we dont mix it with cpu mode
2510          */
2511         if (((stat_config.aggr_mode != AGGR_GLOBAL &&
2512               stat_config.aggr_mode != AGGR_THREAD) || nr_cgroups) &&
2513             !target__has_cpu(&target)) {
2514                 fprintf(stderr, "both cgroup and no-aggregation "
2515                         "modes only available in system-wide mode\n");
2516
2517                 parse_options_usage(stat_usage, stat_options, "G", 1);
2518                 parse_options_usage(NULL, stat_options, "A", 1);
2519                 parse_options_usage(NULL, stat_options, "a", 1);
2520                 goto out;
2521         }
2522
2523         if (add_default_attributes())
2524                 goto out;
2525
2526         target__validate(&target);
2527
2528         if (perf_evlist__create_maps(evsel_list, &target) < 0) {
2529                 if (target__has_task(&target)) {
2530                         pr_err("Problems finding threads of monitor\n");
2531                         parse_options_usage(stat_usage, stat_options, "p", 1);
2532                         parse_options_usage(NULL, stat_options, "t", 1);
2533                 } else if (target__has_cpu(&target)) {
2534                         perror("failed to parse CPUs map");
2535                         parse_options_usage(stat_usage, stat_options, "C", 1);
2536                         parse_options_usage(NULL, stat_options, "a", 1);
2537                 }
2538                 goto out;
2539         }
2540
2541         /*
2542          * Initialize thread_map with comm names,
2543          * so we could print it out on output.
2544          */
2545         if (stat_config.aggr_mode == AGGR_THREAD)
2546                 thread_map__read_comms(evsel_list->threads);
2547
2548         if (interval && interval < 100) {
2549                 if (interval < 10) {
2550                         pr_err("print interval must be >= 10ms\n");
2551                         parse_options_usage(stat_usage, stat_options, "I", 1);
2552                         goto out;
2553                 } else
2554                         pr_warning("print interval < 100ms. "
2555                                    "The overhead percentage could be high in some cases. "
2556                                    "Please proceed with caution.\n");
2557         }
2558
2559         if (perf_evlist__alloc_stats(evsel_list, interval))
2560                 goto out;
2561
2562         if (perf_stat_init_aggr_mode())
2563                 goto out;
2564
2565         /*
2566          * We dont want to block the signals - that would cause
2567          * child tasks to inherit that and Ctrl-C would not work.
2568          * What we want is for Ctrl-C to work in the exec()-ed
2569          * task, but being ignored by perf stat itself:
2570          */
2571         atexit(sig_atexit);
2572         if (!forever)
2573                 signal(SIGINT,  skip_signal);
2574         signal(SIGCHLD, skip_signal);
2575         signal(SIGALRM, skip_signal);
2576         signal(SIGABRT, skip_signal);
2577
2578         status = 0;
2579         for (run_idx = 0; forever || run_idx < run_count; run_idx++) {
2580                 if (run_count != 1 && verbose > 0)
2581                         fprintf(output, "[ perf stat: executing run #%d ... ]\n",
2582                                 run_idx + 1);
2583
2584                 status = run_perf_stat(argc, argv);
2585                 if (forever && status != -1) {
2586                         print_counters(NULL, argc, argv);
2587                         perf_stat__reset_stats();
2588                 }
2589         }
2590
2591         if (!forever && status != -1 && !interval)
2592                 print_counters(NULL, argc, argv);
2593
2594         if (STAT_RECORD) {
2595                 /*
2596                  * We synthesize the kernel mmap record just so that older tools
2597                  * don't emit warnings about not being able to resolve symbols
2598                  * due to /proc/sys/kernel/kptr_restrict settings and instear provide
2599                  * a saner message about no samples being in the perf.data file.
2600                  *
2601                  * This also serves to suppress a warning about f_header.data.size == 0
2602                  * in header.c at the moment 'perf stat record' gets introduced, which
2603                  * is not really needed once we start adding the stat specific PERF_RECORD_
2604                  * records, but the need to suppress the kptr_restrict messages in older
2605                  * tools remain  -acme
2606                  */
2607                 int fd = perf_data_file__fd(&perf_stat.file);
2608                 int err = perf_event__synthesize_kernel_mmap((void *)&perf_stat,
2609                                                              process_synthesized_event,
2610                                                              &perf_stat.session->machines.host);
2611                 if (err) {
2612                         pr_warning("Couldn't synthesize the kernel mmap record, harmless, "
2613                                    "older tools may produce warnings about this file\n.");
2614                 }
2615
2616                 if (!interval) {
2617                         if (WRITE_STAT_ROUND_EVENT(walltime_nsecs_stats.max, FINAL))
2618                                 pr_err("failed to write stat round event\n");
2619                 }
2620
2621                 if (!perf_stat.file.is_pipe) {
2622                         perf_stat.session->header.data_size += perf_stat.bytes_written;
2623                         perf_session__write_header(perf_stat.session, evsel_list, fd, true);
2624                 }
2625
2626                 perf_session__delete(perf_stat.session);
2627         }
2628
2629         perf_stat__exit_aggr_mode();
2630         perf_evlist__free_stats(evsel_list);
2631 out:
2632         perf_evlist__delete(evsel_list);
2633         return status;
2634 }