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/string2.h"
  67 #include "util/metricgroup.h"
  68 #include "asm/bug.h"
  69
  70 #include <linux/time64.h>
  71 #include <api/fs/fs.h>
  72 #include <errno.h>
  73 #include <signal.h>
  74 #include <stdlib.h>
  75 #include <sys/prctl.h>
  76 #include <inttypes.h>
  77 #include <locale.h>
  78 #include <math.h>
  79 #include <sys/types.h>
  80 #include <sys/stat.h>
  81 #include <sys/wait.h>
  82 #include <unistd.h>
  83
  84 #include "sane_ctype.h"
  85
  86 #define DEFAULT_SEPARATOR       " "
  87 #define CNTR_NOT_SUPPORTED      "<not supported>"
  88 #define CNTR_NOT_COUNTED        "<not counted>"
  89 #define FREEZE_ON_SMI_PATH      "devices/cpu/freeze_on_smi"
  90
  91 static void print_counters(struct timespec *ts, int argc, const char **argv);
  92
  93 /* Default events used for perf stat -T */
  94 static const char *transaction_attrs = {
  95         "task-clock,"
  96         "{"
  97         "instructions,"
  98         "cycles,"
  99         "cpu/cycles-t/,"
 100         "cpu/tx-start/,"
 101         "cpu/el-start/,"
 102         "cpu/cycles-ct/"
 103         "}"
 104 };
 105
 106 /* More limited version when the CPU does not have all events. */
 107 static const char * transaction_limited_attrs = {
 108         "task-clock,"
 109         "{"
 110         "instructions,"
 111         "cycles,"
 112         "cpu/cycles-t/,"
 113         "cpu/tx-start/"
 114         "}"
 115 };
 116
 117 static const char * topdown_attrs[] = {
 118         "topdown-total-slots",
 119         "topdown-slots-retired",
 120         "topdown-recovery-bubbles",
 121         "topdown-fetch-bubbles",
 122         "topdown-slots-issued",
 123         NULL,
 124 };
 125
 126 static const char *smi_cost_attrs = {
 127         "{"
 128         "msr/aperf/,"
 129         "msr/smi/,"
 130         "cycles"
 131         "}"
 132 };
 133
 134 static struct perf_evlist       *evsel_list;
 135
 136 static struct rblist             metric_events;
 137
 138 static struct target target = {
 139         .uid    = UINT_MAX,
 140 };
 141
 142 typedef int (*aggr_get_id_t)(struct cpu_map *m, int cpu);
 143
 144 static int                      run_count                       =  1;
 145 static bool                     no_inherit                      = false;
 146 static volatile pid_t           child_pid                       = -1;
 147 static bool                     null_run                        =  false;
 148 static int                      detailed_run                    =  0;
 149 static bool                     transaction_run;
 150 static bool                     topdown_run                     = false;
 151 static bool                     smi_cost                        = false;
 152 static bool                     smi_reset                       = false;
 153 static bool                     big_num                         =  true;
 154 static int                      big_num_opt                     =  -1;
 155 static const char               *csv_sep                        = NULL;
 156 static bool                     csv_output                      = false;
 157 static bool                     group                           = false;
 158 static const char               *pre_cmd                        = NULL;
 159 static const char               *post_cmd                       = NULL;
 160 static bool                     sync_run                        = false;
 161 static unsigned int             initial_delay                   = 0;
 162 static unsigned int             unit_width                      = 4; /* strlen("unit") */
 163 static bool                     forever                         = false;
 164 static bool                     metric_only                     = false;
 165 static bool                     force_metric_only               = false;
 166 static bool                     no_merge                        = false;
 167 static struct timespec          ref_time;
 168 static struct cpu_map           *aggr_map;
 169 static aggr_get_id_t            aggr_get_id;
 170 static bool                     append_file;
 171 static bool                     interval_count;
 172 static const char               *output_name;
 173 static int                      output_fd;
 174 static int                      print_free_counters_hint;
 175 static int                      print_mixed_hw_group_error;
 176
 177 struct perf_stat {
 178         bool                     record;
 179         struct perf_data         data;
 180         struct perf_session     *session;
 181         u64                      bytes_written;
 182         struct perf_tool         tool;
 183         bool                     maps_allocated;
 184         struct cpu_map          *cpus;
 185         struct thread_map       *threads;
 186         enum aggr_mode           aggr_mode;
 187 };
 188
 189 static struct perf_stat         perf_stat;
 190 #define STAT_RECORD             perf_stat.record
 191
 192 static volatile int done = 0;
 193
 194 static struct perf_stat_config stat_config = {
 195         .aggr_mode      = AGGR_GLOBAL,
 196         .scale          = true,
 197 };
 198
 199 static bool is_duration_time(struct perf_evsel *evsel)
 200 {
 201         return !strcmp(evsel->name, "duration_time");
 202 }
 203
 204 static inline void diff_timespec(struct timespec *r, struct timespec *a,
 205                                  struct timespec *b)
 206 {
 207         r->tv_sec = a->tv_sec - b->tv_sec;
 208         if (a->tv_nsec < b->tv_nsec) {
 209                 r->tv_nsec = a->tv_nsec + NSEC_PER_SEC - b->tv_nsec;
 210                 r->tv_sec--;
 211         } else {
 212                 r->tv_nsec = a->tv_nsec - b->tv_nsec ;
 213         }
 214 }
 215
 216 static void perf_stat__reset_stats(void)
 217 {
 218         int i;
 219
 220         perf_evlist__reset_stats(evsel_list);
 221         perf_stat__reset_shadow_stats();
 222
 223         for (i = 0; i < stat_config.stats_num; i++)
 224                 perf_stat__reset_shadow_per_stat(&stat_config.stats[i]);
 225 }
 226
 227 static int create_perf_stat_counter(struct perf_evsel *evsel)
 228 {
 229         struct perf_event_attr *attr = &evsel->attr;
 230         struct perf_evsel *leader = evsel->leader;
 231
 232         if (stat_config.scale) {
 233                 attr->read_format = PERF_FORMAT_TOTAL_TIME_ENABLED |
 234                                     PERF_FORMAT_TOTAL_TIME_RUNNING;
 235         }
 236
 237         /*
 238          * The event is part of non trivial group, let's enable
 239          * the group read (for leader) and ID retrieval for all
 240          * members.
 241          */
 242         if (leader->nr_members > 1)
 243                 attr->read_format |= PERF_FORMAT_ID|PERF_FORMAT_GROUP;
 244
 245         attr->inherit = !no_inherit;
 246
 247         /*
 248          * Some events get initialized with sample_(period/type) set,
 249          * like tracepoints. Clear it up for counting.
 250          */
 251         attr->sample_period = 0;
 252
 253         /*
 254          * But set sample_type to PERF_SAMPLE_IDENTIFIER, which should be harmless
 255          * while avoiding that older tools show confusing messages.
 256          *
 257          * However for pipe sessions we need to keep it zero,
 258          * because script's perf_evsel__check_attr is triggered
 259          * by attr->sample_type != 0, and we can't run it on
 260          * stat sessions.
 261          */
 262         if (!(STAT_RECORD && perf_stat.data.is_pipe))
 263                 attr->sample_type = PERF_SAMPLE_IDENTIFIER;
 264
 265         /*
 266          * Disabling all counters initially, they will be enabled
 267          * either manually by us or by kernel via enable_on_exec
 268          * set later.
 269          */
 270         if (perf_evsel__is_group_leader(evsel)) {
 271                 attr->disabled = 1;
 272
 273                 /*
 274                  * In case of initial_delay we enable tracee
 275                  * events manually.
 276                  */
 277                 if (target__none(&target) && !initial_delay)
 278                         attr->enable_on_exec = 1;
 279         }
 280
 281         if (target__has_cpu(&target) && !target__has_per_thread(&target))
 282                 return perf_evsel__open_per_cpu(evsel, perf_evsel__cpus(evsel));
 283
 284         return perf_evsel__open_per_thread(evsel, evsel_list->threads);
 285 }
 286
 287 /*
 288  * Does the counter have nsecs as a unit?
 289  */
 290 static inline int nsec_counter(struct perf_evsel *evsel)
 291 {
 292         if (perf_evsel__match(evsel, SOFTWARE, SW_CPU_CLOCK) ||
 293             perf_evsel__match(evsel, SOFTWARE, SW_TASK_CLOCK))
 294                 return 1;
 295
 296         return 0;
 297 }
 298
 299 static int process_synthesized_event(struct perf_tool *tool __maybe_unused,
 300                                      union perf_event *event,
 301                                      struct perf_sample *sample __maybe_unused,
 302                                      struct machine *machine __maybe_unused)
 303 {
 304         if (perf_data__write(&perf_stat.data, event, event->header.size) < 0) {
 305                 pr_err("failed to write perf data, error: %m\n");
 306                 return -1;
 307         }
 308
 309         perf_stat.bytes_written += event->header.size;
 310         return 0;
 311 }
 312
 313 static int write_stat_round_event(u64 tm, u64 type)
 314 {
 315         return perf_event__synthesize_stat_round(NULL, tm, type,
 316                                                  process_synthesized_event,
 317                                                  NULL);
 318 }
 319
 320 #define WRITE_STAT_ROUND_EVENT(time, interval) \
 321         write_stat_round_event(time, PERF_STAT_ROUND_TYPE__ ## interval)
 322
 323 #define SID(e, x, y) xyarray__entry(e->sample_id, x, y)
 324
 325 static int
 326 perf_evsel__write_stat_event(struct perf_evsel *counter, u32 cpu, u32 thread,
 327                              struct perf_counts_values *count)
 328 {
 329         struct perf_sample_id *sid = SID(counter, cpu, thread);
 330
 331         return perf_event__synthesize_stat(NULL, cpu, thread, sid->id, count,
 332                                            process_synthesized_event, NULL);
 333 }
 334
 335 /*
 336  * Read out the results of a single counter:
 337  * do not aggregate counts across CPUs in system-wide mode
 338  */
 339 static int read_counter(struct perf_evsel *counter)
 340 {
 341         int nthreads = thread_map__nr(evsel_list->threads);
 342         int ncpus, cpu, thread;
 343
 344         if (target__has_cpu(&target) && !target__has_per_thread(&target))
 345                 ncpus = perf_evsel__nr_cpus(counter);
 346         else
 347                 ncpus = 1;
 348
 349         if (!counter->supported)
 350                 return -ENOENT;
 351
 352         if (counter->system_wide)
 353                 nthreads = 1;
 354
 355         for (thread = 0; thread < nthreads; thread++) {
 356                 for (cpu = 0; cpu < ncpus; cpu++) {
 357                         struct perf_counts_values *count;
 358
 359                         count = perf_counts(counter->counts, cpu, thread);
 360
 361                         /*
 362                          * The leader's group read loads data into its group members
 363                          * (via perf_evsel__read_counter) and sets threir count->loaded.
 364                          */
 365                         if (!count->loaded &&
 366                             perf_evsel__read_counter(counter, cpu, thread)) {
 367                                 counter->counts->scaled = -1;
 368                                 perf_counts(counter->counts, cpu, thread)->ena = 0;
 369                                 perf_counts(counter->counts, cpu, thread)->run = 0;
 370                                 return -1;
 371                         }
 372
 373                         count->loaded = false;
 374
 375                         if (STAT_RECORD) {
 376                                 if (perf_evsel__write_stat_event(counter, cpu, thread, count)) {
 377                                         pr_err("failed to write stat event\n");
 378                                         return -1;
 379                                 }
 380                         }
 381
 382                         if (verbose > 1) {
 383                                 fprintf(stat_config.output,
 384                                         "%s: %d: %" PRIu64 " %" PRIu64 " %" PRIu64 "\n",
 385                                                 perf_evsel__name(counter),
 386                                                 cpu,
 387                                                 count->val, count->ena, count->run);
 388                         }
 389                 }
 390         }
 391
 392         return 0;
 393 }
 394
 395 static void read_counters(void)
 396 {
 397         struct perf_evsel *counter;
 398         int ret;
 399
 400         evlist__for_each_entry(evsel_list, counter) {
 401                 ret = read_counter(counter);
 402                 if (ret)
 403                         pr_debug("failed to read counter %s\n", counter->name);
 404
 405                 if (ret == 0 && perf_stat_process_counter(&stat_config, counter))
 406                         pr_warning("failed to process counter %s\n", counter->name);
 407         }
 408 }
 409
 410 static void process_interval(void)
 411 {
 412         struct timespec ts, rs;
 413
 414         read_counters();
 415
 416         clock_gettime(CLOCK_MONOTONIC, &ts);
 417         diff_timespec(&rs, &ts, &ref_time);
 418
 419         if (STAT_RECORD) {
 420                 if (WRITE_STAT_ROUND_EVENT(rs.tv_sec * NSEC_PER_SEC + rs.tv_nsec, INTERVAL))
 421                         pr_err("failed to write stat round event\n");
 422         }
 423
 424         init_stats(&walltime_nsecs_stats);
 425         update_stats(&walltime_nsecs_stats, stat_config.interval * 1000000);
 426         print_counters(&rs, 0, NULL);
 427 }
 428
 429 static void enable_counters(void)
 430 {
 431         if (initial_delay)
 432                 usleep(initial_delay * USEC_PER_MSEC);
 433
 434         /*
 435          * We need to enable counters only if:
 436          * - we don't have tracee (attaching to task or cpu)
 437          * - we have initial delay configured
 438          */
 439         if (!target__none(&target) || initial_delay)
 440                 perf_evlist__enable(evsel_list);
 441 }
 442
 443 static void disable_counters(void)
 444 {
 445         /*
 446          * If we don't have tracee (attaching to task or cpu), counters may
 447          * still be running. To get accurate group ratios, we must stop groups
 448          * from counting before reading their constituent counters.
 449          */
 450         if (!target__none(&target))
 451                 perf_evlist__disable(evsel_list);
 452 }
 453
 454 static volatile int workload_exec_errno;
 455
 456 /*
 457  * perf_evlist__prepare_workload will send a SIGUSR1
 458  * if the fork fails, since we asked by setting its
 459  * want_signal to true.
 460  */
 461 static void workload_exec_failed_signal(int signo __maybe_unused, siginfo_t *info,
 462                                         void *ucontext __maybe_unused)
 463 {
 464         workload_exec_errno = info->si_value.sival_int;
 465 }
 466
 467 static int perf_stat_synthesize_config(bool is_pipe)
 468 {
 469         int err;
 470
 471         if (is_pipe) {
 472                 err = perf_event__synthesize_attrs(NULL, perf_stat.session,
 473                                                    process_synthesized_event);
 474                 if (err < 0) {
 475                         pr_err("Couldn't synthesize attrs.\n");
 476                         return err;
 477                 }
 478         }
 479
 480         err = perf_event__synthesize_extra_attr(NULL,
 481                                                 evsel_list,
 482                                                 process_synthesized_event,
 483                                                 is_pipe);
 484
 485         err = perf_event__synthesize_thread_map2(NULL, evsel_list->threads,
 486                                                 process_synthesized_event,
 487                                                 NULL);
 488         if (err < 0) {
 489                 pr_err("Couldn't synthesize thread map.\n");
 490                 return err;
 491         }
 492
 493         err = perf_event__synthesize_cpu_map(NULL, evsel_list->cpus,
 494                                              process_synthesized_event, NULL);
 495         if (err < 0) {
 496                 pr_err("Couldn't synthesize thread map.\n");
 497                 return err;
 498         }
 499
 500         err = perf_event__synthesize_stat_config(NULL, &stat_config,
 501                                                  process_synthesized_event, NULL);
 502         if (err < 0) {
 503                 pr_err("Couldn't synthesize config.\n");
 504                 return err;
 505         }
 506
 507         return 0;
 508 }
 509
 510 #define FD(e, x, y) (*(int *)xyarray__entry(e->fd, x, y))
 511
 512 static int __store_counter_ids(struct perf_evsel *counter)
 513 {
 514         int cpu, thread;
 515
 516         for (cpu = 0; cpu < xyarray__max_x(counter->fd); cpu++) {
 517                 for (thread = 0; thread < xyarray__max_y(counter->fd);
 518                      thread++) {
 519                         int fd = FD(counter, cpu, thread);
 520
 521                         if (perf_evlist__id_add_fd(evsel_list, counter,
 522                                                    cpu, thread, fd) < 0)
 523                                 return -1;
 524                 }
 525         }
 526
 527         return 0;
 528 }
 529
 530 static int store_counter_ids(struct perf_evsel *counter)
 531 {
 532         struct cpu_map *cpus = counter->cpus;
 533         struct thread_map *threads = counter->threads;
 534
 535         if (perf_evsel__alloc_id(counter, cpus->nr, threads->nr))
 536                 return -ENOMEM;
 537
 538         return __store_counter_ids(counter);
 539 }
 540
 541 static bool perf_evsel__should_store_id(struct perf_evsel *counter)
 542 {
 543         return STAT_RECORD || counter->attr.read_format & PERF_FORMAT_ID;
 544 }
 545
 546 static struct perf_evsel *perf_evsel__reset_weak_group(struct perf_evsel *evsel)
 547 {
 548         struct perf_evsel *c2, *leader;
 549         bool is_open = true;
 550
 551         leader = evsel->leader;
 552         pr_debug("Weak group for %s/%d failed\n",
 553                         leader->name, leader->nr_members);
 554
 555         /*
 556          * for_each_group_member doesn't work here because it doesn't
 557          * include the first entry.
 558          */
 559         evlist__for_each_entry(evsel_list, c2) {
 560                 if (c2 == evsel)
 561                         is_open = false;
 562                 if (c2->leader == leader) {
 563                         if (is_open)
 564                                 perf_evsel__close(c2);
 565                         c2->leader = c2;
 566                         c2->nr_members = 0;
 567                 }
 568         }
 569         return leader;
 570 }
 571
 572 static int __run_perf_stat(int argc, const char **argv)
 573 {
 574         int interval = stat_config.interval;
 575         int times = stat_config.times;
 576         int timeout = stat_config.timeout;
 577         char msg[BUFSIZ];
 578         unsigned long long t0, t1;
 579         struct perf_evsel *counter;
 580         struct timespec ts;
 581         size_t l;
 582         int status = 0;
 583         const bool forks = (argc > 0);
 584         bool is_pipe = STAT_RECORD ? perf_stat.data.is_pipe : false;
 585         struct perf_evsel_config_term *err_term;
 586
 587         if (interval) {
 588                 ts.tv_sec  = interval / USEC_PER_MSEC;
 589                 ts.tv_nsec = (interval % USEC_PER_MSEC) * NSEC_PER_MSEC;
 590         } else if (timeout) {
 591                 ts.tv_sec  = timeout / USEC_PER_MSEC;
 592                 ts.tv_nsec = (timeout % USEC_PER_MSEC) * NSEC_PER_MSEC;
 593         } else {
 594                 ts.tv_sec  = 1;
 595                 ts.tv_nsec = 0;
 596         }
 597
 598         if (forks) {
 599                 if (perf_evlist__prepare_workload(evsel_list, &target, argv, is_pipe,
 600                                                   workload_exec_failed_signal) < 0) {
 601                         perror("failed to prepare workload");
 602                         return -1;
 603                 }
 604                 child_pid = evsel_list->workload.pid;
 605         }
 606
 607         if (group)
 608                 perf_evlist__set_leader(evsel_list);
 609
 610         evlist__for_each_entry(evsel_list, counter) {
 611 try_again:
 612                 if (create_perf_stat_counter(counter) < 0) {
 613
 614                         /* Weak group failed. Reset the group. */
 615                         if ((errno == EINVAL || errno == EBADF) &&
 616                             counter->leader != counter &&
 617                             counter->weak_group) {
 618                                 counter = perf_evsel__reset_weak_group(counter);
 619                                 goto try_again;
 620                         }
 621
 622                         /*
 623                          * PPC returns ENXIO for HW counters until 2.6.37
 624                          * (behavior changed with commit b0a873e).
 625                          */
 626                         if (errno == EINVAL || errno == ENOSYS ||
 627                             errno == ENOENT || errno == EOPNOTSUPP ||
 628                             errno == ENXIO) {
 629                                 if (verbose > 0)
 630                                         ui__warning("%s event is not supported by the kernel.\n",
 631                                                     perf_evsel__name(counter));
 632                                 counter->supported = false;
 633
 634                                 if ((counter->leader != counter) ||
 635                                     !(counter->leader->nr_members > 1))
 636                                         continue;
 637                         } else if (perf_evsel__fallback(counter, errno, msg, sizeof(msg))) {
 638                                 if (verbose > 0)
 639                                         ui__warning("%s\n", msg);
 640                                 goto try_again;
 641                         } else if (target__has_per_thread(&target) &&
 642                                    evsel_list->threads &&
 643                                    evsel_list->threads->err_thread != -1) {
 644                                 /*
 645                                  * For global --per-thread case, skip current
 646                                  * error thread.
 647                                  */
 648                                 if (!thread_map__remove(evsel_list->threads,
 649                                                         evsel_list->threads->err_thread)) {
 650                                         evsel_list->threads->err_thread = -1;
 651                                         goto try_again;
 652                                 }
 653                         }
 654
 655                         perf_evsel__open_strerror(counter, &target,
 656                                                   errno, msg, sizeof(msg));
 657                         ui__error("%s\n", msg);
 658
 659                         if (child_pid != -1)
 660                                 kill(child_pid, SIGTERM);
 661
 662                         return -1;
 663                 }
 664                 counter->supported = true;
 665
 666                 l = strlen(counter->unit);
 667                 if (l > unit_width)
 668                         unit_width = l;
 669
 670                 if (perf_evsel__should_store_id(counter) &&
 671                     store_counter_ids(counter))
 672                         return -1;
 673         }
 674
 675         if (perf_evlist__apply_filters(evsel_list, &counter)) {
 676                 pr_err("failed to set filter \"%s\" on event %s with %d (%s)\n",
 677                         counter->filter, perf_evsel__name(counter), errno,
 678                         str_error_r(errno, msg, sizeof(msg)));
 679                 return -1;
 680         }
 681
 682         if (perf_evlist__apply_drv_configs(evsel_list, &counter, &err_term)) {
 683                 pr_err("failed to set config \"%s\" on event %s with %d (%s)\n",
 684                       err_term->val.drv_cfg, perf_evsel__name(counter), errno,
 685                       str_error_r(errno, msg, sizeof(msg)));
 686                 return -1;
 687         }
 688
 689         if (STAT_RECORD) {
 690                 int err, fd = perf_data__fd(&perf_stat.data);
 691
 692                 if (is_pipe) {
 693                         err = perf_header__write_pipe(perf_data__fd(&perf_stat.data));
 694                 } else {
 695                         err = perf_session__write_header(perf_stat.session, evsel_list,
 696                                                          fd, false);
 697                 }
 698
 699                 if (err < 0)
 700                         return err;
 701
 702                 err = perf_stat_synthesize_config(is_pipe);
 703                 if (err < 0)
 704                         return err;
 705         }
 706
 707         /*
 708          * Enable counters and exec the command:
 709          */
 710         t0 = rdclock();
 711         clock_gettime(CLOCK_MONOTONIC, &ref_time);
 712
 713         if (forks) {
 714                 perf_evlist__start_workload(evsel_list);
 715                 enable_counters();
 716
 717                 if (interval || timeout) {
 718                         while (!waitpid(child_pid, &status, WNOHANG)) {
 719                                 nanosleep(&ts, NULL);
 720                                 if (timeout)
 721                                         break;
 722                                 process_interval();
 723                                 if (interval_count && !(--times))
 724                                         break;
 725                         }
 726                 }
 727                 waitpid(child_pid, &status, 0);
 728
 729                 if (workload_exec_errno) {
 730                         const char *emsg = str_error_r(workload_exec_errno, msg, sizeof(msg));
 731                         pr_err("Workload failed: %s\n", emsg);
 732                         return -1;
 733                 }
 734
 735                 if (WIFSIGNALED(status))
 736                         psignal(WTERMSIG(status), argv[0]);
 737         } else {
 738                 enable_counters();
 739                 while (!done) {
 740                         nanosleep(&ts, NULL);
 741                         if (timeout)
 742                                 break;
 743                         if (interval) {
 744                                 process_interval();
 745                                 if (interval_count && !(--times))
 746                                         break;
 747                         }
 748                 }
 749         }
 750
 751         disable_counters();
 752
 753         t1 = rdclock();
 754
 755         update_stats(&walltime_nsecs_stats, t1 - t0);
 756
 757         /*
 758          * Closing a group leader splits the group, and as we only disable
 759          * group leaders, results in remaining events becoming enabled. To
 760          * avoid arbitrary skew, we must read all counters before closing any
 761          * group leaders.
 762          */
 763         read_counters();
 764         perf_evlist__close(evsel_list);
 765
 766         return WEXITSTATUS(status);
 767 }
 768
 769 static int run_perf_stat(int argc, const char **argv)
 770 {
 771         int ret;
 772
 773         if (pre_cmd) {
 774                 ret = system(pre_cmd);
 775                 if (ret)
 776                         return ret;
 777         }
 778
 779         if (sync_run)
 780                 sync();
 781
 782         ret = __run_perf_stat(argc, argv);
 783         if (ret)
 784                 return ret;
 785
 786         if (post_cmd) {
 787                 ret = system(post_cmd);
 788                 if (ret)
 789                         return ret;
 790         }
 791
 792         return ret;
 793 }
 794
 795 static void print_running(u64 run, u64 ena)
 796 {
 797         if (csv_output) {
 798                 fprintf(stat_config.output, "%s%" PRIu64 "%s%.2f",
 799                                         csv_sep,
 800                                         run,
 801                                         csv_sep,
 802                                         ena ? 100.0 * run / ena : 100.0);
 803         } else if (run != ena) {
 804                 fprintf(stat_config.output, "  (%.2f%%)", 100.0 * run / ena);
 805         }
 806 }
 807
 808 static void print_noise_pct(double total, double avg)
 809 {
 810         double pct = rel_stddev_stats(total, avg);
 811
 812         if (csv_output)
 813                 fprintf(stat_config.output, "%s%.2f%%", csv_sep, pct);
 814         else if (pct)
 815                 fprintf(stat_config.output, "  ( +-%6.2f%% )", pct);
 816 }
 817
 818 static void print_noise(struct perf_evsel *evsel, double avg)
 819 {
 820         struct perf_stat_evsel *ps;
 821
 822         if (run_count == 1)
 823                 return;
 824
 825         ps = evsel->stats;
 826         print_noise_pct(stddev_stats(&ps->res_stats[0]), avg);
 827 }
 828
 829 static void aggr_printout(struct perf_evsel *evsel, int id, int nr)
 830 {
 831         switch (stat_config.aggr_mode) {
 832         case AGGR_CORE:
 833                 fprintf(stat_config.output, "S%d-C%*d%s%*d%s",
 834                         cpu_map__id_to_socket(id),
 835                         csv_output ? 0 : -8,
 836                         cpu_map__id_to_cpu(id),
 837                         csv_sep,
 838                         csv_output ? 0 : 4,
 839                         nr,
 840                         csv_sep);
 841                 break;
 842         case AGGR_SOCKET:
 843                 fprintf(stat_config.output, "S%*d%s%*d%s",
 844                         csv_output ? 0 : -5,
 845                         id,
 846                         csv_sep,
 847                         csv_output ? 0 : 4,
 848                         nr,
 849                         csv_sep);
 850                         break;
 851         case AGGR_NONE:
 852                 fprintf(stat_config.output, "CPU%*d%s",
 853                         csv_output ? 0 : -4,
 854                         perf_evsel__cpus(evsel)->map[id], csv_sep);
 855                 break;
 856         case AGGR_THREAD:
 857                 fprintf(stat_config.output, "%*s-%*d%s",
 858                         csv_output ? 0 : 16,
 859                         thread_map__comm(evsel->threads, id),
 860                         csv_output ? 0 : -8,
 861                         thread_map__pid(evsel->threads, id),
 862                         csv_sep);
 863                 break;
 864         case AGGR_GLOBAL:
 865         case AGGR_UNSET:
 866         default:
 867                 break;
 868         }
 869 }
 870
 871 struct outstate {
 872         FILE *fh;
 873         bool newline;
 874         const char *prefix;
 875         int  nfields;
 876         int  id, nr;
 877         struct perf_evsel *evsel;
 878 };
 879
 880 #define METRIC_LEN  35
 881
 882 static void new_line_std(void *ctx)
 883 {
 884         struct outstate *os = ctx;
 885
 886         os->newline = true;
 887 }
 888
 889 static void do_new_line_std(struct outstate *os)
 890 {
 891         fputc('\n', os->fh);
 892         fputs(os->prefix, os->fh);
 893         aggr_printout(os->evsel, os->id, os->nr);
 894         if (stat_config.aggr_mode == AGGR_NONE)
 895                 fprintf(os->fh, "        ");
 896         fprintf(os->fh, "                                                 ");
 897 }
 898
 899 static void print_metric_std(void *ctx, const char *color, const char *fmt,
 900                              const char *unit, double val)
 901 {
 902         struct outstate *os = ctx;
 903         FILE *out = os->fh;
 904         int n;
 905         bool newline = os->newline;
 906
 907         os->newline = false;
 908
 909         if (unit == NULL || fmt == NULL) {
 910                 fprintf(out, "%-*s", METRIC_LEN, "");
 911                 return;
 912         }
 913
 914         if (newline)
 915                 do_new_line_std(os);
 916
 917         n = fprintf(out, " # ");
 918         if (color)
 919                 n += color_fprintf(out, color, fmt, val);
 920         else
 921                 n += fprintf(out, fmt, val);
 922         fprintf(out, " %-*s", METRIC_LEN - n - 1, unit);
 923 }
 924
 925 static void new_line_csv(void *ctx)
 926 {
 927         struct outstate *os = ctx;
 928         int i;
 929
 930         fputc('\n', os->fh);
 931         if (os->prefix)
 932                 fprintf(os->fh, "%s%s", os->prefix, csv_sep);
 933         aggr_printout(os->evsel, os->id, os->nr);
 934         for (i = 0; i < os->nfields; i++)
 935                 fputs(csv_sep, os->fh);
 936 }
 937
 938 static void print_metric_csv(void *ctx,
 939                              const char *color __maybe_unused,
 940                              const char *fmt, const char *unit, double val)
 941 {
 942         struct outstate *os = ctx;
 943         FILE *out = os->fh;
 944         char buf[64], *vals, *ends;
 945
 946         if (unit == NULL || fmt == NULL) {
 947                 fprintf(out, "%s%s", csv_sep, csv_sep);
 948                 return;
 949         }
 950         snprintf(buf, sizeof(buf), fmt, val);
 951         ends = vals = ltrim(buf);
 952         while (isdigit(*ends) || *ends == '.')
 953                 ends++;
 954         *ends = 0;
 955         while (isspace(*unit))
 956                 unit++;
 957         fprintf(out, "%s%s%s%s", csv_sep, vals, csv_sep, unit);
 958 }
 959
 960 #define METRIC_ONLY_LEN 20
 961
 962 /* Filter out some columns that don't work well in metrics only mode */
 963
 964 static bool valid_only_metric(const char *unit)
 965 {
 966         if (!unit)
 967                 return false;
 968         if (strstr(unit, "/sec") ||
 969             strstr(unit, "hz") ||
 970             strstr(unit, "Hz") ||
 971             strstr(unit, "CPUs utilized"))
 972                 return false;
 973         return true;
 974 }
 975
 976 static const char *fixunit(char *buf, struct perf_evsel *evsel,
 977                            const char *unit)
 978 {
 979         if (!strncmp(unit, "of all", 6)) {
 980                 snprintf(buf, 1024, "%s %s", perf_evsel__name(evsel),
 981                          unit);
 982                 return buf;
 983         }
 984         return unit;
 985 }
 986
 987 static void print_metric_only(void *ctx, const char *color, const char *fmt,
 988                               const char *unit, double val)
 989 {
 990         struct outstate *os = ctx;
 991         FILE *out = os->fh;
 992         int n;
 993         char buf[1024];
 994         unsigned mlen = METRIC_ONLY_LEN;
 995
 996         if (!valid_only_metric(unit))
 997                 return;
 998         unit = fixunit(buf, os->evsel, unit);
 999         if (color)
1000                 n = color_fprintf(out, color, fmt, val);
1001         else
1002                 n = fprintf(out, fmt, val);
1003         if (n > METRIC_ONLY_LEN)
1004                 n = METRIC_ONLY_LEN;
1005         if (mlen < strlen(unit))
1006                 mlen = strlen(unit) + 1;
1007         fprintf(out, "%*s", mlen - n, "");
1008 }
1009
1010 static void print_metric_only_csv(void *ctx, const char *color __maybe_unused,
1011                                   const char *fmt,
1012                                   const char *unit, double val)
1013 {
1014         struct outstate *os = ctx;
1015         FILE *out = os->fh;
1016         char buf[64], *vals, *ends;
1017         char tbuf[1024];
1018
1019         if (!valid_only_metric(unit))
1020                 return;
1021         unit = fixunit(tbuf, os->evsel, unit);
1022         snprintf(buf, sizeof buf, fmt, val);
1023         ends = vals = ltrim(buf);
1024         while (isdigit(*ends) || *ends == '.')
1025                 ends++;
1026         *ends = 0;
1027         fprintf(out, "%s%s", vals, csv_sep);
1028 }
1029
1030 static void new_line_metric(void *ctx __maybe_unused)
1031 {
1032 }
1033
1034 static void print_metric_header(void *ctx, const char *color __maybe_unused,
1035                                 const char *fmt __maybe_unused,
1036                                 const char *unit, double val __maybe_unused)
1037 {
1038         struct outstate *os = ctx;
1039         char tbuf[1024];
1040
1041         if (!valid_only_metric(unit))
1042                 return;
1043         unit = fixunit(tbuf, os->evsel, unit);
1044         if (csv_output)
1045                 fprintf(os->fh, "%s%s", unit, csv_sep);
1046         else
1047                 fprintf(os->fh, "%-*s ", METRIC_ONLY_LEN, unit);
1048 }
1049
1050 static void nsec_printout(int id, int nr, struct perf_evsel *evsel, double avg)
1051 {
1052         FILE *output = stat_config.output;
1053         double msecs = avg / NSEC_PER_MSEC;
1054         const char *fmt_v, *fmt_n;
1055         char name[25];
1056
1057         fmt_v = csv_output ? "%.6f%s" : "%18.6f%s";
1058         fmt_n = csv_output ? "%s" : "%-25s";
1059
1060         aggr_printout(evsel, id, nr);
1061
1062         scnprintf(name, sizeof(name), "%s%s",
1063                   perf_evsel__name(evsel), csv_output ? "" : " (msec)");
1064
1065         fprintf(output, fmt_v, msecs, csv_sep);
1066
1067         if (csv_output)
1068                 fprintf(output, "%s%s", evsel->unit, csv_sep);
1069         else
1070                 fprintf(output, "%-*s%s", unit_width, evsel->unit, csv_sep);
1071
1072         fprintf(output, fmt_n, name);
1073
1074         if (evsel->cgrp)
1075                 fprintf(output, "%s%s", csv_sep, evsel->cgrp->name);
1076 }
1077
1078 static int first_shadow_cpu(struct perf_evsel *evsel, int id)
1079 {
1080         int i;
1081
1082         if (!aggr_get_id)
1083                 return 0;
1084
1085         if (stat_config.aggr_mode == AGGR_NONE)
1086                 return id;
1087
1088         if (stat_config.aggr_mode == AGGR_GLOBAL)
1089                 return 0;
1090
1091         for (i = 0; i < perf_evsel__nr_cpus(evsel); i++) {
1092                 int cpu2 = perf_evsel__cpus(evsel)->map[i];
1093
1094                 if (aggr_get_id(evsel_list->cpus, cpu2) == id)
1095                         return cpu2;
1096         }
1097         return 0;
1098 }
1099
1100 static void abs_printout(int id, int nr, struct perf_evsel *evsel, double avg)
1101 {
1102         FILE *output = stat_config.output;
1103         double sc =  evsel->scale;
1104         const char *fmt;
1105
1106         if (csv_output) {
1107                 fmt = floor(sc) != sc ?  "%.2f%s" : "%.0f%s";
1108         } else {
1109                 if (big_num)
1110                         fmt = floor(sc) != sc ? "%'18.2f%s" : "%'18.0f%s";
1111                 else
1112                         fmt = floor(sc) != sc ? "%18.2f%s" : "%18.0f%s";
1113         }
1114
1115         aggr_printout(evsel, id, nr);
1116
1117         fprintf(output, fmt, avg, csv_sep);
1118
1119         if (evsel->unit)
1120                 fprintf(output, "%-*s%s",
1121                         csv_output ? 0 : unit_width,
1122                         evsel->unit, csv_sep);
1123
1124         fprintf(output, "%-*s", csv_output ? 0 : 25, perf_evsel__name(evsel));
1125
1126         if (evsel->cgrp)
1127                 fprintf(output, "%s%s", csv_sep, evsel->cgrp->name);
1128 }
1129
1130 static bool is_mixed_hw_group(struct perf_evsel *counter)
1131 {
1132         struct perf_evlist *evlist = counter->evlist;
1133         u32 pmu_type = counter->attr.type;
1134         struct perf_evsel *pos;
1135
1136         if (counter->nr_members < 2)
1137                 return false;
1138
1139         evlist__for_each_entry(evlist, pos) {
1140                 /* software events can be part of any hardware group */
1141                 if (pos->attr.type == PERF_TYPE_SOFTWARE)
1142                         continue;
1143                 if (pmu_type == PERF_TYPE_SOFTWARE) {
1144                         pmu_type = pos->attr.type;
1145                         continue;
1146                 }
1147                 if (pmu_type != pos->attr.type)
1148                         return true;
1149         }
1150
1151         return false;
1152 }
1153
1154 static void printout(int id, int nr, struct perf_evsel *counter, double uval,
1155                      char *prefix, u64 run, u64 ena, double noise,
1156                      struct runtime_stat *st)
1157 {
1158         struct perf_stat_output_ctx out;
1159         struct outstate os = {
1160                 .fh = stat_config.output,
1161                 .prefix = prefix ? prefix : "",
1162                 .id = id,
1163                 .nr = nr,
1164                 .evsel = counter,
1165         };
1166         print_metric_t pm = print_metric_std;
1167         void (*nl)(void *);
1168
1169         if (metric_only) {
1170                 nl = new_line_metric;
1171                 if (csv_output)
1172                         pm = print_metric_only_csv;
1173                 else
1174                         pm = print_metric_only;
1175         } else
1176                 nl = new_line_std;
1177
1178         if (csv_output && !metric_only) {
1179                 static int aggr_fields[] = {
1180                         [AGGR_GLOBAL] = 0,
1181                         [AGGR_THREAD] = 1,
1182                         [AGGR_NONE] = 1,
1183                         [AGGR_SOCKET] = 2,
1184                         [AGGR_CORE] = 2,
1185                 };
1186
1187                 pm = print_metric_csv;
1188                 nl = new_line_csv;
1189                 os.nfields = 3;
1190                 os.nfields += aggr_fields[stat_config.aggr_mode];
1191                 if (counter->cgrp)
1192                         os.nfields++;
1193         }
1194         if (run == 0 || ena == 0 || counter->counts->scaled == -1) {
1195                 if (metric_only) {
1196                         pm(&os, NULL, "", "", 0);
1197                         return;
1198                 }
1199                 aggr_printout(counter, id, nr);
1200
1201                 fprintf(stat_config.output, "%*s%s",
1202                         csv_output ? 0 : 18,
1203                         counter->supported ? CNTR_NOT_COUNTED : CNTR_NOT_SUPPORTED,
1204                         csv_sep);
1205
1206                 if (counter->supported) {
1207                         print_free_counters_hint = 1;
1208                         if (is_mixed_hw_group(counter))
1209                                 print_mixed_hw_group_error = 1;
1210                 }
1211
1212                 fprintf(stat_config.output, "%-*s%s",
1213                         csv_output ? 0 : unit_width,
1214                         counter->unit, csv_sep);
1215
1216                 fprintf(stat_config.output, "%*s",
1217                         csv_output ? 0 : -25,
1218                         perf_evsel__name(counter));
1219
1220                 if (counter->cgrp)
1221                         fprintf(stat_config.output, "%s%s",
1222                                 csv_sep, counter->cgrp->name);
1223
1224                 if (!csv_output)
1225                         pm(&os, NULL, NULL, "", 0);
1226                 print_noise(counter, noise);
1227                 print_running(run, ena);
1228                 if (csv_output)
1229                         pm(&os, NULL, NULL, "", 0);
1230                 return;
1231         }
1232
1233         if (metric_only)
1234                 /* nothing */;
1235         else if (nsec_counter(counter))
1236                 nsec_printout(id, nr, counter, uval);
1237         else
1238                 abs_printout(id, nr, counter, uval);
1239
1240         out.print_metric = pm;
1241         out.new_line = nl;
1242         out.ctx = &os;
1243         out.force_header = false;
1244
1245         if (csv_output && !metric_only) {
1246                 print_noise(counter, noise);
1247                 print_running(run, ena);
1248         }
1249
1250         perf_stat__print_shadow_stats(counter, uval,
1251                                 first_shadow_cpu(counter, id),
1252                                 &out, &metric_events, st);
1253         if (!csv_output && !metric_only) {
1254                 print_noise(counter, noise);
1255                 print_running(run, ena);
1256         }
1257 }
1258
1259 static void aggr_update_shadow(void)
1260 {
1261         int cpu, s2, id, s;
1262         u64 val;
1263         struct perf_evsel *counter;
1264
1265         for (s = 0; s < aggr_map->nr; s++) {
1266                 id = aggr_map->map[s];
1267                 evlist__for_each_entry(evsel_list, counter) {
1268                         val = 0;
1269                         for (cpu = 0; cpu < perf_evsel__nr_cpus(counter); cpu++) {
1270                                 s2 = aggr_get_id(evsel_list->cpus, cpu);
1271                                 if (s2 != id)
1272                                         continue;
1273                                 val += perf_counts(counter->counts, cpu, 0)->val;
1274                         }
1275                         perf_stat__update_shadow_stats(counter, val,
1276                                         first_shadow_cpu(counter, id),
1277                                         &rt_stat);
1278                 }
1279         }
1280 }
1281
1282 static void uniquify_event_name(struct perf_evsel *counter)
1283 {
1284         char *new_name;
1285         char *config;
1286
1287         if (counter->uniquified_name ||
1288             !counter->pmu_name || !strncmp(counter->name, counter->pmu_name,
1289                                            strlen(counter->pmu_name)))
1290                 return;
1291
1292         config = strchr(counter->name, '/');
1293         if (config) {
1294                 if (asprintf(&new_name,
1295                              "%s%s", counter->pmu_name, config) > 0) {
1296                         free(counter->name);
1297                         counter->name = new_name;
1298                 }
1299         } else {
1300                 if (asprintf(&new_name,
1301                              "%s [%s]", counter->name, counter->pmu_name) > 0) {
1302                         free(counter->name);
1303                         counter->name = new_name;
1304                 }
1305         }
1306
1307         counter->uniquified_name = true;
1308 }
1309
1310 static void collect_all_aliases(struct perf_evsel *counter,
1311                             void (*cb)(struct perf_evsel *counter, void *data,
1312                                        bool first),
1313                             void *data)
1314 {
1315         struct perf_evsel *alias;
1316
1317         alias = list_prepare_entry(counter, &(evsel_list->entries), node);
1318         list_for_each_entry_continue (alias, &evsel_list->entries, node) {
1319                 if (strcmp(perf_evsel__name(alias), perf_evsel__name(counter)) ||
1320                     alias->scale != counter->scale ||
1321                     alias->cgrp != counter->cgrp ||
1322                     strcmp(alias->unit, counter->unit) ||
1323                     nsec_counter(alias) != nsec_counter(counter))
1324                         break;
1325                 alias->merged_stat = true;
1326                 cb(alias, data, false);
1327         }
1328 }
1329
1330 static bool collect_data(struct perf_evsel *counter,
1331                             void (*cb)(struct perf_evsel *counter, void *data,
1332                                        bool first),
1333                             void *data)
1334 {
1335         if (counter->merged_stat)
1336                 return false;
1337         cb(counter, data, true);
1338         if (no_merge)
1339                 uniquify_event_name(counter);
1340         else if (counter->auto_merge_stats)
1341                 collect_all_aliases(counter, cb, data);
1342         return true;
1343 }
1344
1345 struct aggr_data {
1346         u64 ena, run, val;
1347         int id;
1348         int nr;
1349         int cpu;
1350 };
1351
1352 static void aggr_cb(struct perf_evsel *counter, void *data, bool first)
1353 {
1354         struct aggr_data *ad = data;
1355         int cpu, s2;
1356
1357         for (cpu = 0; cpu < perf_evsel__nr_cpus(counter); cpu++) {
1358                 struct perf_counts_values *counts;
1359
1360                 s2 = aggr_get_id(perf_evsel__cpus(counter), cpu);
1361                 if (s2 != ad->id)
1362                         continue;
1363                 if (first)
1364                         ad->nr++;
1365                 counts = perf_counts(counter->counts, cpu, 0);
1366                 /*
1367                  * When any result is bad, make them all to give
1368                  * consistent output in interval mode.
1369                  */
1370                 if (counts->ena == 0 || counts->run == 0 ||
1371                     counter->counts->scaled == -1) {
1372                         ad->ena = 0;
1373                         ad->run = 0;
1374                         break;
1375                 }
1376                 ad->val += counts->val;
1377                 ad->ena += counts->ena;
1378                 ad->run += counts->run;
1379         }
1380 }
1381
1382 static void print_aggr(char *prefix)
1383 {
1384         FILE *output = stat_config.output;
1385         struct perf_evsel *counter;
1386         int s, id, nr;
1387         double uval;
1388         u64 ena, run, val;
1389         bool first;
1390
1391         if (!(aggr_map || aggr_get_id))
1392                 return;
1393
1394         aggr_update_shadow();
1395
1396         /*
1397          * With metric_only everything is on a single line.
1398          * Without each counter has its own line.
1399          */
1400         for (s = 0; s < aggr_map->nr; s++) {
1401                 struct aggr_data ad;
1402                 if (prefix && metric_only)
1403                         fprintf(output, "%s", prefix);
1404
1405                 ad.id = id = aggr_map->map[s];
1406                 first = true;
1407                 evlist__for_each_entry(evsel_list, counter) {
1408                         if (is_duration_time(counter))
1409                                 continue;
1410
1411                         ad.val = ad.ena = ad.run = 0;
1412                         ad.nr = 0;
1413                         if (!collect_data(counter, aggr_cb, &ad))
1414                                 continue;
1415                         nr = ad.nr;
1416                         ena = ad.ena;
1417                         run = ad.run;
1418                         val = ad.val;
1419                         if (first && metric_only) {
1420                                 first = false;
1421                                 aggr_printout(counter, id, nr);
1422                         }
1423                         if (prefix && !metric_only)
1424                                 fprintf(output, "%s", prefix);
1425
1426                         uval = val * counter->scale;
1427                         printout(id, nr, counter, uval, prefix, run, ena, 1.0,
1428                                  &rt_stat);
1429                         if (!metric_only)
1430                                 fputc('\n', output);
1431                 }
1432                 if (metric_only)
1433                         fputc('\n', output);
1434         }
1435 }
1436
1437 static int cmp_val(const void *a, const void *b)
1438 {
1439         return ((struct perf_aggr_thread_value *)b)->val -
1440                 ((struct perf_aggr_thread_value *)a)->val;
1441 }
1442
1443 static struct perf_aggr_thread_value *sort_aggr_thread(
1444                                         struct perf_evsel *counter,
1445                                         int nthreads, int ncpus,
1446                                         int *ret)
1447 {
1448         int cpu, thread, i = 0;
1449         double uval;
1450         struct perf_aggr_thread_value *buf;
1451
1452         buf = calloc(nthreads, sizeof(struct perf_aggr_thread_value));
1453         if (!buf)
1454                 return NULL;
1455
1456         for (thread = 0; thread < nthreads; thread++) {
1457                 u64 ena = 0, run = 0, val = 0;
1458
1459                 for (cpu = 0; cpu < ncpus; cpu++) {
1460                         val += perf_counts(counter->counts, cpu, thread)->val;
1461                         ena += perf_counts(counter->counts, cpu, thread)->ena;
1462                         run += perf_counts(counter->counts, cpu, thread)->run;
1463                 }
1464
1465                 uval = val * counter->scale;
1466
1467                 /*
1468                  * Skip value 0 when enabling --per-thread globally,
1469                  * otherwise too many 0 output.
1470                  */
1471                 if (uval == 0.0 && target__has_per_thread(&target))
1472                         continue;
1473
1474                 buf[i].counter = counter;
1475                 buf[i].id = thread;
1476                 buf[i].uval = uval;
1477                 buf[i].val = val;
1478                 buf[i].run = run;
1479                 buf[i].ena = ena;
1480                 i++;
1481         }
1482
1483         qsort(buf, i, sizeof(struct perf_aggr_thread_value), cmp_val);
1484
1485         if (ret)
1486                 *ret = i;
1487
1488         return buf;
1489 }
1490
1491 static void print_aggr_thread(struct perf_evsel *counter, char *prefix)
1492 {
1493         FILE *output = stat_config.output;
1494         int nthreads = thread_map__nr(counter->threads);
1495         int ncpus = cpu_map__nr(counter->cpus);
1496         int thread, sorted_threads, id;
1497         struct perf_aggr_thread_value *buf;
1498
1499         buf = sort_aggr_thread(counter, nthreads, ncpus, &sorted_threads);
1500         if (!buf) {
1501                 perror("cannot sort aggr thread");
1502                 return;
1503         }
1504
1505         for (thread = 0; thread < sorted_threads; thread++) {
1506                 if (prefix)
1507                         fprintf(output, "%s", prefix);
1508
1509                 id = buf[thread].id;
1510                 if (stat_config.stats)
1511                         printout(id, 0, buf[thread].counter, buf[thread].uval,
1512                                  prefix, buf[thread].run, buf[thread].ena, 1.0,
1513                                  &stat_config.stats[id]);
1514                 else
1515                         printout(id, 0, buf[thread].counter, buf[thread].uval,
1516                                  prefix, buf[thread].run, buf[thread].ena, 1.0,
1517                                  &rt_stat);
1518                 fputc('\n', output);
1519         }
1520
1521         free(buf);
1522 }
1523
1524 struct caggr_data {
1525         double avg, avg_enabled, avg_running;
1526 };
1527
1528 static void counter_aggr_cb(struct perf_evsel *counter, void *data,
1529                             bool first __maybe_unused)
1530 {
1531         struct caggr_data *cd = data;
1532         struct perf_stat_evsel *ps = counter->stats;
1533
1534         cd->avg += avg_stats(&ps->res_stats[0]);
1535         cd->avg_enabled += avg_stats(&ps->res_stats[1]);
1536         cd->avg_running += avg_stats(&ps->res_stats[2]);
1537 }
1538
1539 /*
1540  * Print out the results of a single counter:
1541  * aggregated counts in system-wide mode
1542  */
1543 static void print_counter_aggr(struct perf_evsel *counter, char *prefix)
1544 {
1545         FILE *output = stat_config.output;
1546         double uval;
1547         struct caggr_data cd = { .avg = 0.0 };
1548
1549         if (!collect_data(counter, counter_aggr_cb, &cd))
1550                 return;
1551
1552         if (prefix && !metric_only)
1553                 fprintf(output, "%s", prefix);
1554
1555         uval = cd.avg * counter->scale;
1556         printout(-1, 0, counter, uval, prefix, cd.avg_running, cd.avg_enabled,
1557                  cd.avg, &rt_stat);
1558         if (!metric_only)
1559                 fprintf(output, "\n");
1560 }
1561
1562 static void counter_cb(struct perf_evsel *counter, void *data,
1563                        bool first __maybe_unused)
1564 {
1565         struct aggr_data *ad = data;
1566
1567         ad->val += perf_counts(counter->counts, ad->cpu, 0)->val;
1568         ad->ena += perf_counts(counter->counts, ad->cpu, 0)->ena;
1569         ad->run += perf_counts(counter->counts, ad->cpu, 0)->run;
1570 }
1571
1572 /*
1573  * Print out the results of a single counter:
1574  * does not use aggregated count in system-wide
1575  */
1576 static void print_counter(struct perf_evsel *counter, char *prefix)
1577 {
1578         FILE *output = stat_config.output;
1579         u64 ena, run, val;
1580         double uval;
1581         int cpu;
1582
1583         for (cpu = 0; cpu < perf_evsel__nr_cpus(counter); cpu++) {
1584                 struct aggr_data ad = { .cpu = cpu };
1585
1586                 if (!collect_data(counter, counter_cb, &ad))
1587                         return;
1588                 val = ad.val;
1589                 ena = ad.ena;
1590                 run = ad.run;
1591
1592                 if (prefix)
1593                         fprintf(output, "%s", prefix);
1594
1595                 uval = val * counter->scale;
1596                 printout(cpu, 0, counter, uval, prefix, run, ena, 1.0,
1597                          &rt_stat);
1598
1599                 fputc('\n', output);
1600         }
1601 }
1602
1603 static void print_no_aggr_metric(char *prefix)
1604 {
1605         int cpu;
1606         int nrcpus = 0;
1607         struct perf_evsel *counter;
1608         u64 ena, run, val;
1609         double uval;
1610
1611         nrcpus = evsel_list->cpus->nr;
1612         for (cpu = 0; cpu < nrcpus; cpu++) {
1613                 bool first = true;
1614
1615                 if (prefix)
1616                         fputs(prefix, stat_config.output);
1617                 evlist__for_each_entry(evsel_list, counter) {
1618                         if (is_duration_time(counter))
1619                                 continue;
1620                         if (first) {
1621                                 aggr_printout(counter, cpu, 0);
1622                                 first = false;
1623                         }
1624                         val = perf_counts(counter->counts, cpu, 0)->val;
1625                         ena = perf_counts(counter->counts, cpu, 0)->ena;
1626                         run = perf_counts(counter->counts, cpu, 0)->run;
1627
1628                         uval = val * counter->scale;
1629                         printout(cpu, 0, counter, uval, prefix, run, ena, 1.0,
1630                                  &rt_stat);
1631                 }
1632                 fputc('\n', stat_config.output);
1633         }
1634 }
1635
1636 static int aggr_header_lens[] = {
1637         [AGGR_CORE] = 18,
1638         [AGGR_SOCKET] = 12,
1639         [AGGR_NONE] = 6,
1640         [AGGR_THREAD] = 24,
1641         [AGGR_GLOBAL] = 0,
1642 };
1643
1644 static const char *aggr_header_csv[] = {
1645         [AGGR_CORE]     =       "core,cpus,",
1646         [AGGR_SOCKET]   =       "socket,cpus",
1647         [AGGR_NONE]     =       "cpu,",
1648         [AGGR_THREAD]   =       "comm-pid,",
1649         [AGGR_GLOBAL]   =       ""
1650 };
1651
1652 static void print_metric_headers(const char *prefix, bool no_indent)
1653 {
1654         struct perf_stat_output_ctx out;
1655         struct perf_evsel *counter;
1656         struct outstate os = {
1657                 .fh = stat_config.output
1658         };
1659
1660         if (prefix)
1661                 fprintf(stat_config.output, "%s", prefix);
1662
1663         if (!csv_output && !no_indent)
1664                 fprintf(stat_config.output, "%*s",
1665                         aggr_header_lens[stat_config.aggr_mode], "");
1666         if (csv_output) {
1667                 if (stat_config.interval)
1668                         fputs("time,", stat_config.output);
1669                 fputs(aggr_header_csv[stat_config.aggr_mode],
1670                         stat_config.output);
1671         }
1672
1673         /* Print metrics headers only */
1674         evlist__for_each_entry(evsel_list, counter) {
1675                 if (is_duration_time(counter))
1676                         continue;
1677                 os.evsel = counter;
1678                 out.ctx = &os;
1679                 out.print_metric = print_metric_header;
1680                 out.new_line = new_line_metric;
1681                 out.force_header = true;
1682                 os.evsel = counter;
1683                 perf_stat__print_shadow_stats(counter, 0,
1684                                               0,
1685                                               &out,
1686                                               &metric_events,
1687                                               &rt_stat);
1688         }
1689         fputc('\n', stat_config.output);
1690 }
1691
1692 static void print_interval(char *prefix, struct timespec *ts)
1693 {
1694         FILE *output = stat_config.output;
1695         static int num_print_interval;
1696
1697         sprintf(prefix, "%6lu.%09lu%s", ts->tv_sec, ts->tv_nsec, csv_sep);
1698
1699         if (num_print_interval == 0 && !csv_output) {
1700                 switch (stat_config.aggr_mode) {
1701                 case AGGR_SOCKET:
1702                         fprintf(output, "#           time socket cpus");
1703                         if (!metric_only)
1704                                 fprintf(output, "             counts %*s events\n", unit_width, "unit");
1705                         break;
1706                 case AGGR_CORE:
1707                         fprintf(output, "#           time core         cpus");
1708                         if (!metric_only)
1709                                 fprintf(output, "             counts %*s events\n", unit_width, "unit");
1710                         break;
1711                 case AGGR_NONE:
1712                         fprintf(output, "#           time CPU");
1713                         if (!metric_only)
1714                                 fprintf(output, "                counts %*s events\n", unit_width, "unit");
1715                         break;
1716                 case AGGR_THREAD:
1717                         fprintf(output, "#           time             comm-pid");
1718                         if (!metric_only)
1719                                 fprintf(output, "                  counts %*s events\n", unit_width, "unit");
1720                         break;
1721                 case AGGR_GLOBAL:
1722                 default:
1723                         fprintf(output, "#           time");
1724                         if (!metric_only)
1725                                 fprintf(output, "             counts %*s events\n", unit_width, "unit");
1726                 case AGGR_UNSET:
1727                         break;
1728                 }
1729         }
1730
1731         if (num_print_interval == 0 && metric_only)
1732                 print_metric_headers(" ", true);
1733         if (++num_print_interval == 25)
1734                 num_print_interval = 0;
1735 }
1736
1737 static void print_header(int argc, const char **argv)
1738 {
1739         FILE *output = stat_config.output;
1740         int i;
1741
1742         fflush(stdout);
1743
1744         if (!csv_output) {
1745                 fprintf(output, "\n");
1746                 fprintf(output, " Performance counter stats for ");
1747                 if (target.system_wide)
1748                         fprintf(output, "\'system wide");
1749                 else if (target.cpu_list)
1750                         fprintf(output, "\'CPU(s) %s", target.cpu_list);
1751                 else if (!target__has_task(&target)) {
1752                         fprintf(output, "\'%s", argv ? argv[0] : "pipe");
1753                         for (i = 1; argv && (i < argc); i++)
1754                                 fprintf(output, " %s", argv[i]);
1755                 } else if (target.pid)
1756                         fprintf(output, "process id \'%s", target.pid);
1757                 else
1758                         fprintf(output, "thread id \'%s", target.tid);
1759
1760                 fprintf(output, "\'");
1761                 if (run_count > 1)
1762                         fprintf(output, " (%d runs)", run_count);
1763                 fprintf(output, ":\n\n");
1764         }
1765 }
1766
1767 static void print_footer(void)
1768 {
1769         FILE *output = stat_config.output;
1770         int n;
1771
1772         if (!null_run)
1773                 fprintf(output, "\n");
1774         fprintf(output, " %17.9f seconds time elapsed",
1775                         avg_stats(&walltime_nsecs_stats) / NSEC_PER_SEC);
1776         if (run_count > 1) {
1777                 fprintf(output, "                                        ");
1778                 print_noise_pct(stddev_stats(&walltime_nsecs_stats),
1779                                 avg_stats(&walltime_nsecs_stats));
1780         }
1781         fprintf(output, "\n\n");
1782
1783         if (print_free_counters_hint &&
1784             sysctl__read_int("kernel/nmi_watchdog", &n) >= 0 &&
1785             n > 0)
1786                 fprintf(output,
1787 "Some events weren't counted. Try disabling the NMI watchdog:\n"
1788 "       echo 0 > /proc/sys/kernel/nmi_watchdog\n"
1789 "       perf stat ...\n"
1790 "       echo 1 > /proc/sys/kernel/nmi_watchdog\n");
1791
1792         if (print_mixed_hw_group_error)
1793                 fprintf(output,
1794                         "The events in group usually have to be from "
1795                         "the same PMU. Try reorganizing the group.\n");
1796 }
1797
1798 static void print_counters(struct timespec *ts, int argc, const char **argv)
1799 {
1800         int interval = stat_config.interval;
1801         struct perf_evsel *counter;
1802         char buf[64], *prefix = NULL;
1803
1804         /* Do not print anything if we record to the pipe. */
1805         if (STAT_RECORD && perf_stat.data.is_pipe)
1806                 return;
1807
1808         if (interval)
1809                 print_interval(prefix = buf, ts);
1810         else
1811                 print_header(argc, argv);
1812
1813         if (metric_only) {
1814                 static int num_print_iv;
1815
1816                 if (num_print_iv == 0 && !interval)
1817                         print_metric_headers(prefix, false);
1818                 if (num_print_iv++ == 25)
1819                         num_print_iv = 0;
1820                 if (stat_config.aggr_mode == AGGR_GLOBAL && prefix)
1821                         fprintf(stat_config.output, "%s", prefix);
1822         }
1823
1824         switch (stat_config.aggr_mode) {
1825         case AGGR_CORE:
1826         case AGGR_SOCKET:
1827                 print_aggr(prefix);
1828                 break;
1829         case AGGR_THREAD:
1830                 evlist__for_each_entry(evsel_list, counter) {
1831                         if (is_duration_time(counter))
1832                                 continue;
1833                         print_aggr_thread(counter, prefix);
1834                 }
1835                 break;
1836         case AGGR_GLOBAL:
1837                 evlist__for_each_entry(evsel_list, counter) {
1838                         if (is_duration_time(counter))
1839                                 continue;
1840                         print_counter_aggr(counter, prefix);
1841                 }
1842                 if (metric_only)
1843                         fputc('\n', stat_config.output);
1844                 break;
1845         case AGGR_NONE:
1846                 if (metric_only)
1847                         print_no_aggr_metric(prefix);
1848                 else {
1849                         evlist__for_each_entry(evsel_list, counter) {
1850                                 if (is_duration_time(counter))
1851                                         continue;
1852                                 print_counter(counter, prefix);
1853                         }
1854                 }
1855                 break;
1856         case AGGR_UNSET:
1857         default:
1858                 break;
1859         }
1860
1861         if (!interval && !csv_output)
1862                 print_footer();
1863
1864         fflush(stat_config.output);
1865 }
1866
1867 static volatile int signr = -1;
1868
1869 static void skip_signal(int signo)
1870 {
1871         if ((child_pid == -1) || stat_config.interval)
1872                 done = 1;
1873
1874         signr = signo;
1875         /*
1876          * render child_pid harmless
1877          * won't send SIGTERM to a random
1878          * process in case of race condition
1879          * and fast PID recycling
1880          */
1881         child_pid = -1;
1882 }
1883
1884 static void sig_atexit(void)
1885 {
1886         sigset_t set, oset;
1887
1888         /*
1889          * avoid race condition with SIGCHLD handler
1890          * in skip_signal() which is modifying child_pid
1891          * goal is to avoid send SIGTERM to a random
1892          * process
1893          */
1894         sigemptyset(&set);
1895         sigaddset(&set, SIGCHLD);
1896         sigprocmask(SIG_BLOCK, &set, &oset);
1897
1898         if (child_pid != -1)
1899                 kill(child_pid, SIGTERM);
1900
1901         sigprocmask(SIG_SETMASK, &oset, NULL);
1902
1903         if (signr == -1)
1904                 return;
1905
1906         signal(signr, SIG_DFL);
1907         kill(getpid(), signr);
1908 }
1909
1910 static int stat__set_big_num(const struct option *opt __maybe_unused,
1911                              const char *s __maybe_unused, int unset)
1912 {
1913         big_num_opt = unset ? 0 : 1;
1914         return 0;
1915 }
1916
1917 static int enable_metric_only(const struct option *opt __maybe_unused,
1918                               const char *s __maybe_unused, int unset)
1919 {
1920         force_metric_only = true;
1921         metric_only = !unset;
1922         return 0;
1923 }
1924
1925 static int parse_metric_groups(const struct option *opt,
1926                                const char *str,
1927                                int unset __maybe_unused)
1928 {
1929         return metricgroup__parse_groups(opt, str, &metric_events);
1930 }
1931
1932 static const struct option stat_options[] = {
1933         OPT_BOOLEAN('T', "transaction", &transaction_run,
1934                     "hardware transaction statistics"),
1935         OPT_CALLBACK('e', "event", &evsel_list, "event",
1936                      "event selector. use 'perf list' to list available events",
1937                      parse_events_option),
1938         OPT_CALLBACK(0, "filter", &evsel_list, "filter",
1939                      "event filter", parse_filter),
1940         OPT_BOOLEAN('i', "no-inherit", &no_inherit,
1941                     "child tasks do not inherit counters"),
1942         OPT_STRING('p', "pid", &target.pid, "pid",
1943                    "stat events on existing process id"),
1944         OPT_STRING('t', "tid", &target.tid, "tid",
1945                    "stat events on existing thread id"),
1946         OPT_BOOLEAN('a', "all-cpus", &target.system_wide,
1947                     "system-wide collection from all CPUs"),
1948         OPT_BOOLEAN('g', "group", &group,
1949                     "put the counters into a counter group"),
1950         OPT_BOOLEAN('c', "scale", &stat_config.scale, "scale/normalize counters"),
1951         OPT_INCR('v', "verbose", &verbose,
1952                     "be more verbose (show counter open errors, etc)"),
1953         OPT_INTEGER('r', "repeat", &run_count,
1954                     "repeat command and print average + stddev (max: 100, forever: 0)"),
1955         OPT_BOOLEAN('n', "null", &null_run,
1956                     "null run - dont start any counters"),
1957         OPT_INCR('d', "detailed", &detailed_run,
1958                     "detailed run - start a lot of events"),
1959         OPT_BOOLEAN('S', "sync", &sync_run,
1960                     "call sync() before starting a run"),
1961         OPT_CALLBACK_NOOPT('B', "big-num", NULL, NULL,
1962                            "print large numbers with thousands\' separators",
1963                            stat__set_big_num),
1964         OPT_STRING('C', "cpu", &target.cpu_list, "cpu",
1965                     "list of cpus to monitor in system-wide"),
1966         OPT_SET_UINT('A', "no-aggr", &stat_config.aggr_mode,
1967                     "disable CPU count aggregation", AGGR_NONE),
1968         OPT_BOOLEAN(0, "no-merge", &no_merge, "Do not merge identical named events"),
1969         OPT_STRING('x', "field-separator", &csv_sep, "separator",
1970                    "print counts with custom separator"),
1971         OPT_CALLBACK('G', "cgroup", &evsel_list, "name",
1972                      "monitor event in cgroup name only", parse_cgroups),
1973         OPT_STRING('o', "output", &output_name, "file", "output file name"),
1974         OPT_BOOLEAN(0, "append", &append_file, "append to the output file"),
1975         OPT_INTEGER(0, "log-fd", &output_fd,
1976                     "log output to fd, instead of stderr"),
1977         OPT_STRING(0, "pre", &pre_cmd, "command",
1978                         "command to run prior to the measured command"),
1979         OPT_STRING(0, "post", &post_cmd, "command",
1980                         "command to run after to the measured command"),
1981         OPT_UINTEGER('I', "interval-print", &stat_config.interval,
1982                     "print counts at regular interval in ms "
1983                     "(overhead is possible for values <= 100ms)"),
1984         OPT_INTEGER(0, "interval-count", &stat_config.times,
1985                     "print counts for fixed number of times"),
1986         OPT_UINTEGER(0, "timeout", &stat_config.timeout,
1987                     "stop workload and print counts after a timeout period in ms (>= 10ms)"),
1988         OPT_SET_UINT(0, "per-socket", &stat_config.aggr_mode,
1989                      "aggregate counts per processor socket", AGGR_SOCKET),
1990         OPT_SET_UINT(0, "per-core", &stat_config.aggr_mode,
1991                      "aggregate counts per physical processor core", AGGR_CORE),
1992         OPT_SET_UINT(0, "per-thread", &stat_config.aggr_mode,
1993                      "aggregate counts per thread", AGGR_THREAD),
1994         OPT_UINTEGER('D', "delay", &initial_delay,
1995                      "ms to wait before starting measurement after program start"),
1996         OPT_CALLBACK_NOOPT(0, "metric-only", &metric_only, NULL,
1997                         "Only print computed metrics. No raw values", enable_metric_only),
1998         OPT_BOOLEAN(0, "topdown", &topdown_run,
1999                         "measure topdown level 1 statistics"),
2000         OPT_BOOLEAN(0, "smi-cost", &smi_cost,
2001                         "measure SMI cost"),
2002         OPT_CALLBACK('M', "metrics", &evsel_list, "metric/metric group list",
2003                      "monitor specified metrics or metric groups (separated by ,)",
2004                      parse_metric_groups),
2005         OPT_END()
2006 };
2007
2008 static int perf_stat__get_socket(struct cpu_map *map, int cpu)
2009 {
2010         return cpu_map__get_socket(map, cpu, NULL);
2011 }
2012
2013 static int perf_stat__get_core(struct cpu_map *map, int cpu)
2014 {
2015         return cpu_map__get_core(map, cpu, NULL);
2016 }
2017
2018 static int cpu_map__get_max(struct cpu_map *map)
2019 {
2020         int i, max = -1;
2021
2022         for (i = 0; i < map->nr; i++) {
2023                 if (map->map[i] > max)
2024                         max = map->map[i];
2025         }
2026
2027         return max;
2028 }
2029
2030 static struct cpu_map *cpus_aggr_map;
2031
2032 static int perf_stat__get_aggr(aggr_get_id_t get_id, struct cpu_map *map, int idx)
2033 {
2034         int cpu;
2035
2036         if (idx >= map->nr)
2037                 return -1;
2038
2039         cpu = map->map[idx];
2040
2041         if (cpus_aggr_map->map[cpu] == -1)
2042                 cpus_aggr_map->map[cpu] = get_id(map, idx);
2043
2044         return cpus_aggr_map->map[cpu];
2045 }
2046
2047 static int perf_stat__get_socket_cached(struct cpu_map *map, int idx)
2048 {
2049         return perf_stat__get_aggr(perf_stat__get_socket, map, idx);
2050 }
2051
2052 static int perf_stat__get_core_cached(struct cpu_map *map, int idx)
2053 {
2054         return perf_stat__get_aggr(perf_stat__get_core, map, idx);
2055 }
2056
2057 static int perf_stat_init_aggr_mode(void)
2058 {
2059         int nr;
2060
2061         switch (stat_config.aggr_mode) {
2062         case AGGR_SOCKET:
2063                 if (cpu_map__build_socket_map(evsel_list->cpus, &aggr_map)) {
2064                         perror("cannot build socket map");
2065                         return -1;
2066                 }
2067                 aggr_get_id = perf_stat__get_socket_cached;
2068                 break;
2069         case AGGR_CORE:
2070                 if (cpu_map__build_core_map(evsel_list->cpus, &aggr_map)) {
2071                         perror("cannot build core map");
2072                         return -1;
2073                 }
2074                 aggr_get_id = perf_stat__get_core_cached;
2075                 break;
2076         case AGGR_NONE:
2077         case AGGR_GLOBAL:
2078         case AGGR_THREAD:
2079         case AGGR_UNSET:
2080         default:
2081                 break;
2082         }
2083
2084         /*
2085          * The evsel_list->cpus is the base we operate on,
2086          * taking the highest cpu number to be the size of
2087          * the aggregation translate cpumap.
2088          */
2089         nr = cpu_map__get_max(evsel_list->cpus);
2090         cpus_aggr_map = cpu_map__empty_new(nr + 1);
2091         return cpus_aggr_map ? 0 : -ENOMEM;
2092 }
2093
2094 static void perf_stat__exit_aggr_mode(void)
2095 {
2096         cpu_map__put(aggr_map);
2097         cpu_map__put(cpus_aggr_map);
2098         aggr_map = NULL;
2099         cpus_aggr_map = NULL;
2100 }
2101
2102 static inline int perf_env__get_cpu(struct perf_env *env, struct cpu_map *map, int idx)
2103 {
2104         int cpu;
2105
2106         if (idx > map->nr)
2107                 return -1;
2108
2109         cpu = map->map[idx];
2110
2111         if (cpu >= env->nr_cpus_avail)
2112                 return -1;
2113
2114         return cpu;
2115 }
2116
2117 static int perf_env__get_socket(struct cpu_map *map, int idx, void *data)
2118 {
2119         struct perf_env *env = data;
2120         int cpu = perf_env__get_cpu(env, map, idx);
2121
2122         return cpu == -1 ? -1 : env->cpu[cpu].socket_id;
2123 }
2124
2125 static int perf_env__get_core(struct cpu_map *map, int idx, void *data)
2126 {
2127         struct perf_env *env = data;
2128         int core = -1, cpu = perf_env__get_cpu(env, map, idx);
2129
2130         if (cpu != -1) {
2131                 int socket_id = env->cpu[cpu].socket_id;
2132
2133                 /*
2134                  * Encode socket in upper 16 bits
2135                  * core_id is relative to socket, and
2136                  * we need a global id. So we combine
2137                  * socket + core id.
2138                  */
2139                 core = (socket_id << 16) | (env->cpu[cpu].core_id & 0xffff);
2140         }
2141
2142         return core;
2143 }
2144
2145 static int perf_env__build_socket_map(struct perf_env *env, struct cpu_map *cpus,
2146                                       struct cpu_map **sockp)
2147 {
2148         return cpu_map__build_map(cpus, sockp, perf_env__get_socket, env);
2149 }
2150
2151 static int perf_env__build_core_map(struct perf_env *env, struct cpu_map *cpus,
2152                                     struct cpu_map **corep)
2153 {
2154         return cpu_map__build_map(cpus, corep, perf_env__get_core, env);
2155 }
2156
2157 static int perf_stat__get_socket_file(struct cpu_map *map, int idx)
2158 {
2159         return perf_env__get_socket(map, idx, &perf_stat.session->header.env);
2160 }
2161
2162 static int perf_stat__get_core_file(struct cpu_map *map, int idx)
2163 {
2164         return perf_env__get_core(map, idx, &perf_stat.session->header.env);
2165 }
2166
2167 static int perf_stat_init_aggr_mode_file(struct perf_stat *st)
2168 {
2169         struct perf_env *env = &st->session->header.env;
2170
2171         switch (stat_config.aggr_mode) {
2172         case AGGR_SOCKET:
2173                 if (perf_env__build_socket_map(env, evsel_list->cpus, &aggr_map)) {
2174                         perror("cannot build socket map");
2175                         return -1;
2176                 }
2177                 aggr_get_id = perf_stat__get_socket_file;
2178                 break;
2179         case AGGR_CORE:
2180                 if (perf_env__build_core_map(env, evsel_list->cpus, &aggr_map)) {
2181                         perror("cannot build core map");
2182                         return -1;
2183                 }
2184                 aggr_get_id = perf_stat__get_core_file;
2185                 break;
2186         case AGGR_NONE:
2187         case AGGR_GLOBAL:
2188         case AGGR_THREAD:
2189         case AGGR_UNSET:
2190         default:
2191                 break;
2192         }
2193
2194         return 0;
2195 }
2196
2197 static int topdown_filter_events(const char **attr, char **str, bool use_group)
2198 {
2199         int off = 0;
2200         int i;
2201         int len = 0;
2202         char *s;
2203
2204         for (i = 0; attr[i]; i++) {
2205                 if (pmu_have_event("cpu", attr[i])) {
2206                         len += strlen(attr[i]) + 1;
2207                         attr[i - off] = attr[i];
2208                 } else
2209                         off++;
2210         }
2211         attr[i - off] = NULL;
2212
2213         *str = malloc(len + 1 + 2);
2214         if (!*str)
2215                 return -1;
2216         s = *str;
2217         if (i - off == 0) {
2218                 *s = 0;
2219                 return 0;
2220         }
2221         if (use_group)
2222                 *s++ = '{';
2223         for (i = 0; attr[i]; i++) {
2224                 strcpy(s, attr[i]);
2225                 s += strlen(s);
2226                 *s++ = ',';
2227         }
2228         if (use_group) {
2229                 s[-1] = '}';
2230                 *s = 0;
2231         } else
2232                 s[-1] = 0;
2233         return 0;
2234 }
2235
2236 __weak bool arch_topdown_check_group(bool *warn)
2237 {
2238         *warn = false;
2239         return false;
2240 }
2241
2242 __weak void arch_topdown_group_warn(void)
2243 {
2244 }
2245
2246 /*
2247  * Add default attributes, if there were no attributes specified or
2248  * if -d/--detailed, -d -d or -d -d -d is used:
2249  */
2250 static int add_default_attributes(void)
2251 {
2252         int err;
2253         struct perf_event_attr default_attrs0[] = {
2254
2255   { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_TASK_CLOCK              },
2256   { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_CONTEXT_SWITCHES        },
2257   { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_CPU_MIGRATIONS          },
2258   { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_PAGE_FAULTS             },
2259
2260   { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_CPU_CYCLES              },
2261 };
2262         struct perf_event_attr frontend_attrs[] = {
2263   { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_STALLED_CYCLES_FRONTEND },
2264 };
2265         struct perf_event_attr backend_attrs[] = {
2266   { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_STALLED_CYCLES_BACKEND  },
2267 };
2268         struct perf_event_attr default_attrs1[] = {
2269   { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_INSTRUCTIONS            },
2270   { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_BRANCH_INSTRUCTIONS     },
2271   { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_BRANCH_MISSES           },
2272
2273 };
2274
2275 /*
2276  * Detailed stats (-d), covering the L1 and last level data caches:
2277  */
2278         struct perf_event_attr detailed_attrs[] = {
2279
2280   { .type = PERF_TYPE_HW_CACHE,
2281     .config =
2282          PERF_COUNT_HW_CACHE_L1D                <<  0  |
2283         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
2284         (PERF_COUNT_HW_CACHE_RESULT_ACCESS      << 16)                          },
2285
2286   { .type = PERF_TYPE_HW_CACHE,
2287     .config =
2288          PERF_COUNT_HW_CACHE_L1D                <<  0  |
2289         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
2290         (PERF_COUNT_HW_CACHE_RESULT_MISS        << 16)                          },
2291
2292   { .type = PERF_TYPE_HW_CACHE,
2293     .config =
2294          PERF_COUNT_HW_CACHE_LL                 <<  0  |
2295         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
2296         (PERF_COUNT_HW_CACHE_RESULT_ACCESS      << 16)                          },
2297
2298   { .type = PERF_TYPE_HW_CACHE,
2299     .config =
2300          PERF_COUNT_HW_CACHE_LL                 <<  0  |
2301         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
2302         (PERF_COUNT_HW_CACHE_RESULT_MISS        << 16)                          },
2303 };
2304
2305 /*
2306  * Very detailed stats (-d -d), covering the instruction cache and the TLB caches:
2307  */
2308         struct perf_event_attr very_detailed_attrs[] = {
2309
2310   { .type = PERF_TYPE_HW_CACHE,
2311     .config =
2312          PERF_COUNT_HW_CACHE_L1I                <<  0  |
2313         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
2314         (PERF_COUNT_HW_CACHE_RESULT_ACCESS      << 16)                          },
2315
2316   { .type = PERF_TYPE_HW_CACHE,
2317     .config =
2318          PERF_COUNT_HW_CACHE_L1I                <<  0  |
2319         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
2320         (PERF_COUNT_HW_CACHE_RESULT_MISS        << 16)                          },
2321
2322   { .type = PERF_TYPE_HW_CACHE,
2323     .config =
2324          PERF_COUNT_HW_CACHE_DTLB               <<  0  |
2325         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
2326         (PERF_COUNT_HW_CACHE_RESULT_ACCESS      << 16)                          },
2327
2328   { .type = PERF_TYPE_HW_CACHE,
2329     .config =
2330          PERF_COUNT_HW_CACHE_DTLB               <<  0  |
2331         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
2332         (PERF_COUNT_HW_CACHE_RESULT_MISS        << 16)                          },
2333
2334   { .type = PERF_TYPE_HW_CACHE,
2335     .config =
2336          PERF_COUNT_HW_CACHE_ITLB               <<  0  |
2337         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
2338         (PERF_COUNT_HW_CACHE_RESULT_ACCESS      << 16)                          },
2339
2340   { .type = PERF_TYPE_HW_CACHE,
2341     .config =
2342          PERF_COUNT_HW_CACHE_ITLB               <<  0  |
2343         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
2344         (PERF_COUNT_HW_CACHE_RESULT_MISS        << 16)                          },
2345
2346 };
2347
2348 /*
2349  * Very, very detailed stats (-d -d -d), adding prefetch events:
2350  */
2351         struct perf_event_attr very_very_detailed_attrs[] = {
2352
2353   { .type = PERF_TYPE_HW_CACHE,
2354     .config =
2355          PERF_COUNT_HW_CACHE_L1D                <<  0  |
2356         (PERF_COUNT_HW_CACHE_OP_PREFETCH        <<  8) |
2357         (PERF_COUNT_HW_CACHE_RESULT_ACCESS      << 16)                          },
2358
2359   { .type = PERF_TYPE_HW_CACHE,
2360     .config =
2361          PERF_COUNT_HW_CACHE_L1D                <<  0  |
2362         (PERF_COUNT_HW_CACHE_OP_PREFETCH        <<  8) |
2363         (PERF_COUNT_HW_CACHE_RESULT_MISS        << 16)                          },
2364 };
2365
2366         /* Set attrs if no event is selected and !null_run: */
2367         if (null_run)
2368                 return 0;
2369
2370         if (transaction_run) {
2371                 struct parse_events_error errinfo;
2372
2373                 if (pmu_have_event("cpu", "cycles-ct") &&
2374                     pmu_have_event("cpu", "el-start"))
2375                         err = parse_events(evsel_list, transaction_attrs,
2376                                            &errinfo);
2377                 else
2378                         err = parse_events(evsel_list,
2379                                            transaction_limited_attrs,
2380                                            &errinfo);
2381                 if (err) {
2382                         fprintf(stderr, "Cannot set up transaction events\n");
2383                         return -1;
2384                 }
2385                 return 0;
2386         }
2387
2388         if (smi_cost) {
2389                 int smi;
2390
2391                 if (sysfs__read_int(FREEZE_ON_SMI_PATH, &smi) < 0) {
2392                         fprintf(stderr, "freeze_on_smi is not supported.\n");
2393                         return -1;
2394                 }
2395
2396                 if (!smi) {
2397                         if (sysfs__write_int(FREEZE_ON_SMI_PATH, 1) < 0) {
2398                                 fprintf(stderr, "Failed to set freeze_on_smi.\n");
2399                                 return -1;
2400                         }
2401                         smi_reset = true;
2402                 }
2403
2404                 if (pmu_have_event("msr", "aperf") &&
2405                     pmu_have_event("msr", "smi")) {
2406                         if (!force_metric_only)
2407                                 metric_only = true;
2408                         err = parse_events(evsel_list, smi_cost_attrs, NULL);
2409                 } else {
2410                         fprintf(stderr, "To measure SMI cost, it needs "
2411                                 "msr/aperf/, msr/smi/ and cpu/cycles/ support\n");
2412                         return -1;
2413                 }
2414                 if (err) {
2415                         fprintf(stderr, "Cannot set up SMI cost events\n");
2416                         return -1;
2417                 }
2418                 return 0;
2419         }
2420
2421         if (topdown_run) {
2422                 char *str = NULL;
2423                 bool warn = false;
2424
2425                 if (stat_config.aggr_mode != AGGR_GLOBAL &&
2426                     stat_config.aggr_mode != AGGR_CORE) {
2427                         pr_err("top down event configuration requires --per-core mode\n");
2428                         return -1;
2429                 }
2430                 stat_config.aggr_mode = AGGR_CORE;
2431                 if (nr_cgroups || !target__has_cpu(&target)) {
2432                         pr_err("top down event configuration requires system-wide mode (-a)\n");
2433                         return -1;
2434                 }
2435
2436                 if (!force_metric_only)
2437                         metric_only = true;
2438                 if (topdown_filter_events(topdown_attrs, &str,
2439                                 arch_topdown_check_group(&warn)) < 0) {
2440                         pr_err("Out of memory\n");
2441                         return -1;
2442                 }
2443                 if (topdown_attrs[0] && str) {
2444                         if (warn)
2445                                 arch_topdown_group_warn();
2446                         err = parse_events(evsel_list, str, NULL);
2447                         if (err) {
2448                                 fprintf(stderr,
2449                                         "Cannot set up top down events %s: %d\n",
2450                                         str, err);
2451                                 free(str);
2452                                 return -1;
2453                         }
2454                 } else {
2455                         fprintf(stderr, "System does not support topdown\n");
2456                         return -1;
2457                 }
2458                 free(str);
2459         }
2460
2461         if (!evsel_list->nr_entries) {
2462                 if (target__has_cpu(&target))
2463                         default_attrs0[0].config = PERF_COUNT_SW_CPU_CLOCK;
2464
2465                 if (perf_evlist__add_default_attrs(evsel_list, default_attrs0) < 0)
2466                         return -1;
2467                 if (pmu_have_event("cpu", "stalled-cycles-frontend")) {
2468                         if (perf_evlist__add_default_attrs(evsel_list,
2469                                                 frontend_attrs) < 0)
2470                                 return -1;
2471                 }
2472                 if (pmu_have_event("cpu", "stalled-cycles-backend")) {
2473                         if (perf_evlist__add_default_attrs(evsel_list,
2474                                                 backend_attrs) < 0)
2475                                 return -1;
2476                 }
2477                 if (perf_evlist__add_default_attrs(evsel_list, default_attrs1) < 0)
2478                         return -1;
2479         }
2480
2481         /* Detailed events get appended to the event list: */
2482
2483         if (detailed_run <  1)
2484                 return 0;
2485
2486         /* Append detailed run extra attributes: */
2487         if (perf_evlist__add_default_attrs(evsel_list, detailed_attrs) < 0)
2488                 return -1;
2489
2490         if (detailed_run < 2)
2491                 return 0;
2492
2493         /* Append very detailed run extra attributes: */
2494         if (perf_evlist__add_default_attrs(evsel_list, very_detailed_attrs) < 0)
2495                 return -1;
2496
2497         if (detailed_run < 3)
2498                 return 0;
2499
2500         /* Append very, very detailed run extra attributes: */
2501         return perf_evlist__add_default_attrs(evsel_list, very_very_detailed_attrs);
2502 }
2503
2504 static const char * const stat_record_usage[] = {
2505         "perf stat record [<options>]",
2506         NULL,
2507 };
2508
2509 static void init_features(struct perf_session *session)
2510 {
2511         int feat;
2512
2513         for (feat = HEADER_FIRST_FEATURE; feat < HEADER_LAST_FEATURE; feat++)
2514                 perf_header__set_feat(&session->header, feat);
2515
2516         perf_header__clear_feat(&session->header, HEADER_BUILD_ID);
2517         perf_header__clear_feat(&session->header, HEADER_TRACING_DATA);
2518         perf_header__clear_feat(&session->header, HEADER_BRANCH_STACK);
2519         perf_header__clear_feat(&session->header, HEADER_AUXTRACE);
2520 }
2521
2522 static int __cmd_record(int argc, const char **argv)
2523 {
2524         struct perf_session *session;
2525         struct perf_data *data = &perf_stat.data;
2526
2527         argc = parse_options(argc, argv, stat_options, stat_record_usage,
2528                              PARSE_OPT_STOP_AT_NON_OPTION);
2529
2530         if (output_name)
2531                 data->file.path = output_name;
2532
2533         if (run_count != 1 || forever) {
2534                 pr_err("Cannot use -r option with perf stat record.\n");
2535                 return -1;
2536         }
2537
2538         session = perf_session__new(data, false, NULL);
2539         if (session == NULL) {
2540                 pr_err("Perf session creation failed.\n");
2541                 return -1;
2542         }
2543
2544         init_features(session);
2545
2546         session->evlist   = evsel_list;
2547         perf_stat.session = session;
2548         perf_stat.record  = true;
2549         return argc;
2550 }
2551
2552 static int process_stat_round_event(struct perf_tool *tool __maybe_unused,
2553                                     union perf_event *event,
2554                                     struct perf_session *session)
2555 {
2556         struct stat_round_event *stat_round = &event->stat_round;
2557         struct perf_evsel *counter;
2558         struct timespec tsh, *ts = NULL;
2559         const char **argv = session->header.env.cmdline_argv;
2560         int argc = session->header.env.nr_cmdline;
2561
2562         evlist__for_each_entry(evsel_list, counter)
2563                 perf_stat_process_counter(&stat_config, counter);
2564
2565         if (stat_round->type == PERF_STAT_ROUND_TYPE__FINAL)
2566                 update_stats(&walltime_nsecs_stats, stat_round->time);
2567
2568         if (stat_config.interval && stat_round->time) {
2569                 tsh.tv_sec  = stat_round->time / NSEC_PER_SEC;
2570                 tsh.tv_nsec = stat_round->time % NSEC_PER_SEC;
2571                 ts = &tsh;
2572         }
2573
2574         print_counters(ts, argc, argv);
2575         return 0;
2576 }
2577
2578 static
2579 int process_stat_config_event(struct perf_tool *tool,
2580                               union perf_event *event,
2581                               struct perf_session *session __maybe_unused)
2582 {
2583         struct perf_stat *st = container_of(tool, struct perf_stat, tool);
2584
2585         perf_event__read_stat_config(&stat_config, &event->stat_config);
2586
2587         if (cpu_map__empty(st->cpus)) {
2588                 if (st->aggr_mode != AGGR_UNSET)
2589                         pr_warning("warning: processing task data, aggregation mode not set\n");
2590                 return 0;
2591         }
2592
2593         if (st->aggr_mode != AGGR_UNSET)
2594                 stat_config.aggr_mode = st->aggr_mode;
2595
2596         if (perf_stat.data.is_pipe)
2597                 perf_stat_init_aggr_mode();
2598         else
2599                 perf_stat_init_aggr_mode_file(st);
2600
2601         return 0;
2602 }
2603
2604 static int set_maps(struct perf_stat *st)
2605 {
2606         if (!st->cpus || !st->threads)
2607                 return 0;
2608
2609         if (WARN_ONCE(st->maps_allocated, "stats double allocation\n"))
2610                 return -EINVAL;
2611
2612         perf_evlist__set_maps(evsel_list, st->cpus, st->threads);
2613
2614         if (perf_evlist__alloc_stats(evsel_list, true))
2615                 return -ENOMEM;
2616
2617         st->maps_allocated = true;
2618         return 0;
2619 }
2620
2621 static
2622 int process_thread_map_event(struct perf_tool *tool,
2623                              union perf_event *event,
2624                              struct perf_session *session __maybe_unused)
2625 {
2626         struct perf_stat *st = container_of(tool, struct perf_stat, tool);
2627
2628         if (st->threads) {
2629                 pr_warning("Extra thread map event, ignoring.\n");
2630                 return 0;
2631         }
2632
2633         st->threads = thread_map__new_event(&event->thread_map);
2634         if (!st->threads)
2635                 return -ENOMEM;
2636
2637         return set_maps(st);
2638 }
2639
2640 static
2641 int process_cpu_map_event(struct perf_tool *tool,
2642                           union perf_event *event,
2643                           struct perf_session *session __maybe_unused)
2644 {
2645         struct perf_stat *st = container_of(tool, struct perf_stat, tool);
2646         struct cpu_map *cpus;
2647
2648         if (st->cpus) {
2649                 pr_warning("Extra cpu map event, ignoring.\n");
2650                 return 0;
2651         }
2652
2653         cpus = cpu_map__new_data(&event->cpu_map.data);
2654         if (!cpus)
2655                 return -ENOMEM;
2656
2657         st->cpus = cpus;
2658         return set_maps(st);
2659 }
2660
2661 static int runtime_stat_new(struct perf_stat_config *config, int nthreads)
2662 {
2663         int i;
2664
2665         config->stats = calloc(nthreads, sizeof(struct runtime_stat));
2666         if (!config->stats)
2667                 return -1;
2668
2669         config->stats_num = nthreads;
2670
2671         for (i = 0; i < nthreads; i++)
2672                 runtime_stat__init(&config->stats[i]);
2673
2674         return 0;
2675 }
2676
2677 static void runtime_stat_delete(struct perf_stat_config *config)
2678 {
2679         int i;
2680
2681         if (!config->stats)
2682                 return;
2683
2684         for (i = 0; i < config->stats_num; i++)
2685                 runtime_stat__exit(&config->stats[i]);
2686
2687         free(config->stats);
2688 }
2689
2690 static const char * const stat_report_usage[] = {
2691         "perf stat report [<options>]",
2692         NULL,
2693 };
2694
2695 static struct perf_stat perf_stat = {
2696         .tool = {
2697                 .attr           = perf_event__process_attr,
2698                 .event_update   = perf_event__process_event_update,
2699                 .thread_map     = process_thread_map_event,
2700                 .cpu_map        = process_cpu_map_event,
2701                 .stat_config    = process_stat_config_event,
2702                 .stat           = perf_event__process_stat_event,
2703                 .stat_round     = process_stat_round_event,
2704         },
2705         .aggr_mode = AGGR_UNSET,
2706 };
2707
2708 static int __cmd_report(int argc, const char **argv)
2709 {
2710         struct perf_session *session;
2711         const struct option options[] = {
2712         OPT_STRING('i', "input", &input_name, "file", "input file name"),
2713         OPT_SET_UINT(0, "per-socket", &perf_stat.aggr_mode,
2714                      "aggregate counts per processor socket", AGGR_SOCKET),
2715         OPT_SET_UINT(0, "per-core", &perf_stat.aggr_mode,
2716                      "aggregate counts per physical processor core", AGGR_CORE),
2717         OPT_SET_UINT('A', "no-aggr", &perf_stat.aggr_mode,
2718                      "disable CPU count aggregation", AGGR_NONE),
2719         OPT_END()
2720         };
2721         struct stat st;
2722         int ret;
2723
2724         argc = parse_options(argc, argv, options, stat_report_usage, 0);
2725
2726         if (!input_name || !strlen(input_name)) {
2727                 if (!fstat(STDIN_FILENO, &st) && S_ISFIFO(st.st_mode))
2728                         input_name = "-";
2729                 else
2730                         input_name = "perf.data";
2731         }
2732
2733         perf_stat.data.file.path = input_name;
2734         perf_stat.data.mode      = PERF_DATA_MODE_READ;
2735
2736         session = perf_session__new(&perf_stat.data, false, &perf_stat.tool);
2737         if (session == NULL)
2738                 return -1;
2739
2740         perf_stat.session  = session;
2741         stat_config.output = stderr;
2742         evsel_list         = session->evlist;
2743
2744         ret = perf_session__process_events(session);
2745         if (ret)
2746                 return ret;
2747
2748         perf_session__delete(session);
2749         return 0;
2750 }
2751
2752 static void setup_system_wide(int forks)
2753 {
2754         /*
2755          * Make system wide (-a) the default target if
2756          * no target was specified and one of following
2757          * conditions is met:
2758          *
2759          *   - there's no workload specified
2760          *   - there is workload specified but all requested
2761          *     events are system wide events
2762          */
2763         if (!target__none(&target))
2764                 return;
2765
2766         if (!forks)
2767                 target.system_wide = true;
2768         else {
2769                 struct perf_evsel *counter;
2770
2771                 evlist__for_each_entry(evsel_list, counter) {
2772                         if (!counter->system_wide)
2773                                 return;
2774                 }
2775
2776                 if (evsel_list->nr_entries)
2777                         target.system_wide = true;
2778         }
2779 }
2780
2781 int cmd_stat(int argc, const char **argv)
2782 {
2783         const char * const stat_usage[] = {
2784                 "perf stat [<options>] [<command>]",
2785                 NULL
2786         };
2787         int status = -EINVAL, run_idx;
2788         const char *mode;
2789         FILE *output = stderr;
2790         unsigned int interval, timeout;
2791         const char * const stat_subcommands[] = { "record", "report" };
2792
2793         setlocale(LC_ALL, "");
2794
2795         evsel_list = perf_evlist__new();
2796         if (evsel_list == NULL)
2797                 return -ENOMEM;
2798
2799         parse_events__shrink_config_terms();
2800         argc = parse_options_subcommand(argc, argv, stat_options, stat_subcommands,
2801                                         (const char **) stat_usage,
2802                                         PARSE_OPT_STOP_AT_NON_OPTION);
2803         perf_stat__collect_metric_expr(evsel_list);
2804         perf_stat__init_shadow_stats();
2805
2806         if (csv_sep) {
2807                 csv_output = true;
2808                 if (!strcmp(csv_sep, "\\t"))
2809                         csv_sep = "\t";
2810         } else
2811                 csv_sep = DEFAULT_SEPARATOR;
2812
2813         if (argc && !strncmp(argv[0], "rec", 3)) {
2814                 argc = __cmd_record(argc, argv);
2815                 if (argc < 0)
2816                         return -1;
2817         } else if (argc && !strncmp(argv[0], "rep", 3))
2818                 return __cmd_report(argc, argv);
2819
2820         interval = stat_config.interval;
2821         timeout = stat_config.timeout;
2822
2823         /*
2824          * For record command the -o is already taken care of.
2825          */
2826         if (!STAT_RECORD && output_name && strcmp(output_name, "-"))
2827                 output = NULL;
2828
2829         if (output_name && output_fd) {
2830                 fprintf(stderr, "cannot use both --output and --log-fd\n");
2831                 parse_options_usage(stat_usage, stat_options, "o", 1);
2832                 parse_options_usage(NULL, stat_options, "log-fd", 0);
2833                 goto out;
2834         }
2835
2836         if (metric_only && stat_config.aggr_mode == AGGR_THREAD) {
2837                 fprintf(stderr, "--metric-only is not supported with --per-thread\n");
2838                 goto out;
2839         }
2840
2841         if (metric_only && run_count > 1) {
2842                 fprintf(stderr, "--metric-only is not supported with -r\n");
2843                 goto out;
2844         }
2845
2846         if (output_fd < 0) {
2847                 fprintf(stderr, "argument to --log-fd must be a > 0\n");
2848                 parse_options_usage(stat_usage, stat_options, "log-fd", 0);
2849                 goto out;
2850         }
2851
2852         if (!output) {
2853                 struct timespec tm;
2854                 mode = append_file ? "a" : "w";
2855
2856                 output = fopen(output_name, mode);
2857                 if (!output) {
2858                         perror("failed to create output file");
2859                         return -1;
2860                 }
2861                 clock_gettime(CLOCK_REALTIME, &tm);
2862                 fprintf(output, "# started on %s\n", ctime(&tm.tv_sec));
2863         } else if (output_fd > 0) {
2864                 mode = append_file ? "a" : "w";
2865                 output = fdopen(output_fd, mode);
2866                 if (!output) {
2867                         perror("Failed opening logfd");
2868                         return -errno;
2869                 }
2870         }
2871
2872         stat_config.output = output;
2873
2874         /*
2875          * let the spreadsheet do the pretty-printing
2876          */
2877         if (csv_output) {
2878                 /* User explicitly passed -B? */
2879                 if (big_num_opt == 1) {
2880                         fprintf(stderr, "-B option not supported with -x\n");
2881                         parse_options_usage(stat_usage, stat_options, "B", 1);
2882                         parse_options_usage(NULL, stat_options, "x", 1);
2883                         goto out;
2884                 } else /* Nope, so disable big number formatting */
2885                         big_num = false;
2886         } else if (big_num_opt == 0) /* User passed --no-big-num */
2887                 big_num = false;
2888
2889         setup_system_wide(argc);
2890
2891         if (run_count < 0) {
2892                 pr_err("Run count must be a positive number\n");
2893                 parse_options_usage(stat_usage, stat_options, "r", 1);
2894                 goto out;
2895         } else if (run_count == 0) {
2896                 forever = true;
2897                 run_count = 1;
2898         }
2899
2900         if ((stat_config.aggr_mode == AGGR_THREAD) &&
2901                 !target__has_task(&target)) {
2902                 if (!target.system_wide || target.cpu_list) {
2903                         fprintf(stderr, "The --per-thread option is only "
2904                                 "available when monitoring via -p -t -a "
2905                                 "options or only --per-thread.\n");
2906                         parse_options_usage(NULL, stat_options, "p", 1);
2907                         parse_options_usage(NULL, stat_options, "t", 1);
2908                         goto out;
2909                 }
2910         }
2911
2912         /*
2913          * no_aggr, cgroup are for system-wide only
2914          * --per-thread is aggregated per thread, we dont mix it with cpu mode
2915          */
2916         if (((stat_config.aggr_mode != AGGR_GLOBAL &&
2917               stat_config.aggr_mode != AGGR_THREAD) || nr_cgroups) &&
2918             !target__has_cpu(&target)) {
2919                 fprintf(stderr, "both cgroup and no-aggregation "
2920                         "modes only available in system-wide mode\n");
2921
2922                 parse_options_usage(stat_usage, stat_options, "G", 1);
2923                 parse_options_usage(NULL, stat_options, "A", 1);
2924                 parse_options_usage(NULL, stat_options, "a", 1);
2925                 goto out;
2926         }
2927
2928         if (add_default_attributes())
2929                 goto out;
2930
2931         target__validate(&target);
2932
2933         if ((stat_config.aggr_mode == AGGR_THREAD) && (target.system_wide))
2934                 target.per_thread = true;
2935
2936         if (perf_evlist__create_maps(evsel_list, &target) < 0) {
2937                 if (target__has_task(&target)) {
2938                         pr_err("Problems finding threads of monitor\n");
2939                         parse_options_usage(stat_usage, stat_options, "p", 1);
2940                         parse_options_usage(NULL, stat_options, "t", 1);
2941                 } else if (target__has_cpu(&target)) {
2942                         perror("failed to parse CPUs map");
2943                         parse_options_usage(stat_usage, stat_options, "C", 1);
2944                         parse_options_usage(NULL, stat_options, "a", 1);
2945                 }
2946                 goto out;
2947         }
2948
2949         /*
2950          * Initialize thread_map with comm names,
2951          * so we could print it out on output.
2952          */
2953         if (stat_config.aggr_mode == AGGR_THREAD) {
2954                 thread_map__read_comms(evsel_list->threads);
2955                 if (target.system_wide) {
2956                         if (runtime_stat_new(&stat_config,
2957                                 thread_map__nr(evsel_list->threads))) {
2958                                 goto out;
2959                         }
2960                 }
2961         }
2962
2963         if (stat_config.times && interval)
2964                 interval_count = true;
2965         else if (stat_config.times && !interval) {
2966                 pr_err("interval-count option should be used together with "
2967                                 "interval-print.\n");
2968                 parse_options_usage(stat_usage, stat_options, "interval-count", 0);
2969                 parse_options_usage(stat_usage, stat_options, "I", 1);
2970                 goto out;
2971         }
2972
2973         if (timeout && timeout < 100) {
2974                 if (timeout < 10) {
2975                         pr_err("timeout must be >= 10ms.\n");
2976                         parse_options_usage(stat_usage, stat_options, "timeout", 0);
2977                         goto out;
2978                 } else
2979                         pr_warning("timeout < 100ms. "
2980                                    "The overhead percentage could be high in some cases. "
2981                                    "Please proceed with caution.\n");
2982         }
2983         if (timeout && interval) {
2984                 pr_err("timeout option is not supported with interval-print.\n");
2985                 parse_options_usage(stat_usage, stat_options, "timeout", 0);
2986                 parse_options_usage(stat_usage, stat_options, "I", 1);
2987                 goto out;
2988         }
2989
2990         if (perf_evlist__alloc_stats(evsel_list, interval))
2991                 goto out;
2992
2993         if (perf_stat_init_aggr_mode())
2994                 goto out;
2995
2996         /*
2997          * We dont want to block the signals - that would cause
2998          * child tasks to inherit that and Ctrl-C would not work.
2999          * What we want is for Ctrl-C to work in the exec()-ed
3000          * task, but being ignored by perf stat itself:
3001          */
3002         atexit(sig_atexit);
3003         if (!forever)
3004                 signal(SIGINT,  skip_signal);
3005         signal(SIGCHLD, skip_signal);
3006         signal(SIGALRM, skip_signal);
3007         signal(SIGABRT, skip_signal);
3008
3009         status = 0;
3010         for (run_idx = 0; forever || run_idx < run_count; run_idx++) {
3011                 if (run_count != 1 && verbose > 0)
3012                         fprintf(output, "[ perf stat: executing run #%d ... ]\n",
3013                                 run_idx + 1);
3014
3015                 status = run_perf_stat(argc, argv);
3016                 if (forever && status != -1) {
3017                         print_counters(NULL, argc, argv);
3018                         perf_stat__reset_stats();
3019                 }
3020         }
3021
3022         if (!forever && status != -1 && !interval)
3023                 print_counters(NULL, argc, argv);
3024
3025         if (STAT_RECORD) {
3026                 /*
3027                  * We synthesize the kernel mmap record just so that older tools
3028                  * don't emit warnings about not being able to resolve symbols
3029                  * due to /proc/sys/kernel/kptr_restrict settings and instear provide
3030                  * a saner message about no samples being in the perf.data file.
3031                  *
3032                  * This also serves to suppress a warning about f_header.data.size == 0
3033                  * in header.c at the moment 'perf stat record' gets introduced, which
3034                  * is not really needed once we start adding the stat specific PERF_RECORD_
3035                  * records, but the need to suppress the kptr_restrict messages in older
3036                  * tools remain  -acme
3037                  */
3038                 int fd = perf_data__fd(&perf_stat.data);
3039                 int err = perf_event__synthesize_kernel_mmap((void *)&perf_stat,
3040                                                              process_synthesized_event,
3041                                                              &perf_stat.session->machines.host);
3042                 if (err) {
3043                         pr_warning("Couldn't synthesize the kernel mmap record, harmless, "
3044                                    "older tools may produce warnings about this file\n.");
3045                 }
3046
3047                 if (!interval) {
3048                         if (WRITE_STAT_ROUND_EVENT(walltime_nsecs_stats.max, FINAL))
3049                                 pr_err("failed to write stat round event\n");
3050                 }
3051
3052                 if (!perf_stat.data.is_pipe) {
3053                         perf_stat.session->header.data_size += perf_stat.bytes_written;
3054                         perf_session__write_header(perf_stat.session, evsel_list, fd, true);
3055                 }
3056
3057                 perf_session__delete(perf_stat.session);
3058         }
3059
3060         perf_stat__exit_aggr_mode();
3061         perf_evlist__free_stats(evsel_list);
3062 out:
3063         if (smi_cost && smi_reset)
3064                 sysfs__write_int(FREEZE_ON_SMI_PATH, 0);
3065
3066         perf_evlist__delete(evsel_list);
3067
3068         runtime_stat_delete(&stat_config);
3069
3070         return status;
3071 }