tools/perf/builtin-stat.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * builtin-stat.c
   4  *
   5  * Builtin stat command: Give a precise performance counters summary
   6  * overview about any workload, CPU or specific PID.
   7  *
   8  * Sample output:
   9
  10    $ perf stat ./hackbench 10
  11
  12   Time: 0.118
  13
  14   Performance counter stats for './hackbench 10':
  15
  16        1708.761321 task-clock                #   11.037 CPUs utilized
  17             41,190 context-switches          #    0.024 M/sec
  18              6,735 CPU-migrations            #    0.004 M/sec
  19             17,318 page-faults               #    0.010 M/sec
  20      5,205,202,243 cycles                    #    3.046 GHz
  21      3,856,436,920 stalled-cycles-frontend   #   74.09% frontend cycles idle
  22      1,600,790,871 stalled-cycles-backend    #   30.75% backend  cycles idle
  23      2,603,501,247 instructions              #    0.50  insns per cycle
  24                                              #    1.48  stalled cycles per insn
  25        484,357,498 branches                  #  283.455 M/sec
  26          6,388,934 branch-misses             #    1.32% of all branches
  27
  28         0.154822978  seconds time elapsed
  29
  30  *
  31  * Copyright (C) 2008-2011, Red Hat Inc, Ingo Molnar <[email protected]>
  32  *
  33  * Improvements and fixes by:
  34  *
  35  *   Arjan van de Ven <[email protected]>
  36  *   Yanmin Zhang <[email protected]>
  37  *   Wu Fengguang <[email protected]>
  38  *   Mike Galbraith <[email protected]>
  39  *   Paul Mackerras <[email protected]>
  40  *   Jaswinder Singh Rajput <[email protected]>
  41  */
  42
  43 #include "builtin.h"
  44 #include "perf.h"
  45 #include "util/cgroup.h"
  46 #include <subcmd/parse-options.h>
  47 #include "util/parse-events.h"
  48 #include "util/pmu.h"
  49 #include "util/event.h"
  50 #include "util/evlist.h"
  51 #include "util/evsel.h"
  52 #include "util/debug.h"
  53 #include "util/color.h"
  54 #include "util/stat.h"
  55 #include "util/header.h"
  56 #include "util/cpumap.h"
  57 #include "util/thread_map.h"
  58 #include "util/counts.h"
  59 #include "util/group.h"
  60 #include "util/session.h"
  61 #include "util/tool.h"
  62 #include "util/string2.h"
  63 #include "util/metricgroup.h"
  64 #include "util/synthetic-events.h"
  65 #include "util/target.h"
  66 #include "util/time-utils.h"
  67 #include "util/top.h"
  68 #include "asm/bug.h"
  69
  70 #include <linux/time64.h>
  71 #include <linux/zalloc.h>
  72 #include <api/fs/fs.h>
  73 #include <errno.h>
  74 #include <signal.h>
  75 #include <stdlib.h>
  76 #include <sys/prctl.h>
  77 #include <inttypes.h>
  78 #include <locale.h>
  79 #include <math.h>
  80 #include <sys/types.h>
  81 #include <sys/stat.h>
  82 #include <sys/wait.h>
  83 #include <unistd.h>
  84 #include <sys/time.h>
  85 #include <sys/resource.h>
  86 #include <linux/err.h>
  87
  88 #include <linux/ctype.h>
  89 #include <perf/evlist.h>
  90
  91 #define DEFAULT_SEPARATOR       " "
  92 #define FREEZE_ON_SMI_PATH      "devices/cpu/freeze_on_smi"
  93
  94 static void print_counters(struct timespec *ts, int argc, const char **argv);
  95
  96 /* Default events used for perf stat -T */
  97 static const char *transaction_attrs = {
  98         "task-clock,"
  99         "{"
 100         "instructions,"
 101         "cycles,"
 102         "cpu/cycles-t/,"
 103         "cpu/tx-start/,"
 104         "cpu/el-start/,"
 105         "cpu/cycles-ct/"
 106         "}"
 107 };
 108
 109 /* More limited version when the CPU does not have all events. */
 110 static const char * transaction_limited_attrs = {
 111         "task-clock,"
 112         "{"
 113         "instructions,"
 114         "cycles,"
 115         "cpu/cycles-t/,"
 116         "cpu/tx-start/"
 117         "}"
 118 };
 119
 120 static const char * topdown_attrs[] = {
 121         "topdown-total-slots",
 122         "topdown-slots-retired",
 123         "topdown-recovery-bubbles",
 124         "topdown-fetch-bubbles",
 125         "topdown-slots-issued",
 126         NULL,
 127 };
 128
 129 static const char *smi_cost_attrs = {
 130         "{"
 131         "msr/aperf/,"
 132         "msr/smi/,"
 133         "cycles"
 134         "}"
 135 };
 136
 137 static struct evlist    *evsel_list;
 138
 139 static struct target target = {
 140         .uid    = UINT_MAX,
 141 };
 142
 143 #define METRIC_ONLY_LEN 20
 144
 145 static volatile pid_t           child_pid                       = -1;
 146 static int                      detailed_run                    =  0;
 147 static bool                     transaction_run;
 148 static bool                     topdown_run                     = false;
 149 static bool                     smi_cost                        = false;
 150 static bool                     smi_reset                       = false;
 151 static int                      big_num_opt                     =  -1;
 152 static bool                     group                           = false;
 153 static const char               *pre_cmd                        = NULL;
 154 static const char               *post_cmd                       = NULL;
 155 static bool                     sync_run                        = false;
 156 static bool                     forever                         = false;
 157 static bool                     force_metric_only               = false;
 158 static struct timespec          ref_time;
 159 static bool                     append_file;
 160 static bool                     interval_count;
 161 static const char               *output_name;
 162 static int                      output_fd;
 163
 164 struct perf_stat {
 165         bool                     record;
 166         struct perf_data         data;
 167         struct perf_session     *session;
 168         u64                      bytes_written;
 169         struct perf_tool         tool;
 170         bool                     maps_allocated;
 171         struct perf_cpu_map     *cpus;
 172         struct perf_thread_map *threads;
 173         enum aggr_mode           aggr_mode;
 174 };
 175
 176 static struct perf_stat         perf_stat;
 177 #define STAT_RECORD             perf_stat.record
 178
 179 static volatile int done = 0;
 180
 181 static struct perf_stat_config stat_config = {
 182         .aggr_mode              = AGGR_GLOBAL,
 183         .scale                  = true,
 184         .unit_width             = 4, /* strlen("unit") */
 185         .run_count              = 1,
 186         .metric_only_len        = METRIC_ONLY_LEN,
 187         .walltime_nsecs_stats   = &walltime_nsecs_stats,
 188         .big_num                = true,
 189 };
 190
 191 static inline void diff_timespec(struct timespec *r, struct timespec *a,
 192                                  struct timespec *b)
 193 {
 194         r->tv_sec = a->tv_sec - b->tv_sec;
 195         if (a->tv_nsec < b->tv_nsec) {
 196                 r->tv_nsec = a->tv_nsec + NSEC_PER_SEC - b->tv_nsec;
 197                 r->tv_sec--;
 198         } else {
 199                 r->tv_nsec = a->tv_nsec - b->tv_nsec ;
 200         }
 201 }
 202
 203 static void perf_stat__reset_stats(void)
 204 {
 205         int i;
 206
 207         perf_evlist__reset_stats(evsel_list);
 208         perf_stat__reset_shadow_stats();
 209
 210         for (i = 0; i < stat_config.stats_num; i++)
 211                 perf_stat__reset_shadow_per_stat(&stat_config.stats[i]);
 212 }
 213
 214 static int process_synthesized_event(struct perf_tool *tool __maybe_unused,
 215                                      union perf_event *event,
 216                                      struct perf_sample *sample __maybe_unused,
 217                                      struct machine *machine __maybe_unused)
 218 {
 219         if (perf_data__write(&perf_stat.data, event, event->header.size) < 0) {
 220                 pr_err("failed to write perf data, error: %m\n");
 221                 return -1;
 222         }
 223
 224         perf_stat.bytes_written += event->header.size;
 225         return 0;
 226 }
 227
 228 static int write_stat_round_event(u64 tm, u64 type)
 229 {
 230         return perf_event__synthesize_stat_round(NULL, tm, type,
 231                                                  process_synthesized_event,
 232                                                  NULL);
 233 }
 234
 235 #define WRITE_STAT_ROUND_EVENT(time, interval) \
 236         write_stat_round_event(time, PERF_STAT_ROUND_TYPE__ ## interval)
 237
 238 #define SID(e, x, y) xyarray__entry(e->core.sample_id, x, y)
 239
 240 static int
 241 perf_evsel__write_stat_event(struct evsel *counter, u32 cpu, u32 thread,
 242                              struct perf_counts_values *count)
 243 {
 244         struct perf_sample_id *sid = SID(counter, cpu, thread);
 245
 246         return perf_event__synthesize_stat(NULL, cpu, thread, sid->id, count,
 247                                            process_synthesized_event, NULL);
 248 }
 249
 250 static int read_single_counter(struct evsel *counter, int cpu,
 251                                int thread, struct timespec *rs)
 252 {
 253         if (counter->tool_event == PERF_TOOL_DURATION_TIME) {
 254                 u64 val = rs->tv_nsec + rs->tv_sec*1000000000ULL;
 255                 struct perf_counts_values *count =
 256                         perf_counts(counter->counts, cpu, thread);
 257                 count->ena = count->run = val;
 258                 count->val = val;
 259                 return 0;
 260         }
 261         return perf_evsel__read_counter(counter, cpu, thread);
 262 }
 263
 264 /*
 265  * Read out the results of a single counter:
 266  * do not aggregate counts across CPUs in system-wide mode
 267  */
 268 static int read_counter(struct evsel *counter, struct timespec *rs)
 269 {
 270         int nthreads = perf_thread_map__nr(evsel_list->core.threads);
 271         int ncpus, cpu, thread;
 272
 273         if (target__has_cpu(&target) && !target__has_per_thread(&target))
 274                 ncpus = perf_evsel__nr_cpus(counter);
 275         else
 276                 ncpus = 1;
 277
 278         if (!counter->supported)
 279                 return -ENOENT;
 280
 281         if (counter->core.system_wide)
 282                 nthreads = 1;
 283
 284         for (thread = 0; thread < nthreads; thread++) {
 285                 for (cpu = 0; cpu < ncpus; cpu++) {
 286                         struct perf_counts_values *count;
 287
 288                         count = perf_counts(counter->counts, cpu, thread);
 289
 290                         /*
 291                          * The leader's group read loads data into its group members
 292                          * (via perf_evsel__read_counter) and sets threir count->loaded.
 293                          */
 294                         if (!perf_counts__is_loaded(counter->counts, cpu, thread) &&
 295                             read_single_counter(counter, cpu, thread, rs)) {
 296                                 counter->counts->scaled = -1;
 297                                 perf_counts(counter->counts, cpu, thread)->ena = 0;
 298                                 perf_counts(counter->counts, cpu, thread)->run = 0;
 299                                 return -1;
 300                         }
 301
 302                         perf_counts__set_loaded(counter->counts, cpu, thread, false);
 303
 304                         if (STAT_RECORD) {
 305                                 if (perf_evsel__write_stat_event(counter, cpu, thread, count)) {
 306                                         pr_err("failed to write stat event\n");
 307                                         return -1;
 308                                 }
 309                         }
 310
 311                         if (verbose > 1) {
 312                                 fprintf(stat_config.output,
 313                                         "%s: %d: %" PRIu64 " %" PRIu64 " %" PRIu64 "\n",
 314                                                 perf_evsel__name(counter),
 315                                                 cpu,
 316                                                 count->val, count->ena, count->run);
 317                         }
 318                 }
 319         }
 320
 321         return 0;
 322 }
 323
 324 static void read_counters(struct timespec *rs)
 325 {
 326         struct evsel *counter;
 327         int ret;
 328
 329         evlist__for_each_entry(evsel_list, counter) {
 330                 ret = read_counter(counter, rs);
 331                 if (ret)
 332                         pr_debug("failed to read counter %s\n", counter->name);
 333
 334                 if (ret == 0 && perf_stat_process_counter(&stat_config, counter))
 335                         pr_warning("failed to process counter %s\n", counter->name);
 336         }
 337 }
 338
 339 static void process_interval(void)
 340 {
 341         struct timespec ts, rs;
 342
 343         clock_gettime(CLOCK_MONOTONIC, &ts);
 344         diff_timespec(&rs, &ts, &ref_time);
 345
 346         read_counters(&rs);
 347
 348         if (STAT_RECORD) {
 349                 if (WRITE_STAT_ROUND_EVENT(rs.tv_sec * NSEC_PER_SEC + rs.tv_nsec, INTERVAL))
 350                         pr_err("failed to write stat round event\n");
 351         }
 352
 353         init_stats(&walltime_nsecs_stats);
 354         update_stats(&walltime_nsecs_stats, stat_config.interval * 1000000);
 355         print_counters(&rs, 0, NULL);
 356 }
 357
 358 static void enable_counters(void)
 359 {
 360         if (stat_config.initial_delay)
 361                 usleep(stat_config.initial_delay * USEC_PER_MSEC);
 362
 363         /*
 364          * We need to enable counters only if:
 365          * - we don't have tracee (attaching to task or cpu)
 366          * - we have initial delay configured
 367          */
 368         if (!target__none(&target) || stat_config.initial_delay)
 369                 evlist__enable(evsel_list);
 370 }
 371
 372 static void disable_counters(void)
 373 {
 374         /*
 375          * If we don't have tracee (attaching to task or cpu), counters may
 376          * still be running. To get accurate group ratios, we must stop groups
 377          * from counting before reading their constituent counters.
 378          */
 379         if (!target__none(&target))
 380                 evlist__disable(evsel_list);
 381 }
 382
 383 static volatile int workload_exec_errno;
 384
 385 /*
 386  * perf_evlist__prepare_workload will send a SIGUSR1
 387  * if the fork fails, since we asked by setting its
 388  * want_signal to true.
 389  */
 390 static void workload_exec_failed_signal(int signo __maybe_unused, siginfo_t *info,
 391                                         void *ucontext __maybe_unused)
 392 {
 393         workload_exec_errno = info->si_value.sival_int;
 394 }
 395
 396 static bool perf_evsel__should_store_id(struct evsel *counter)
 397 {
 398         return STAT_RECORD || counter->core.attr.read_format & PERF_FORMAT_ID;
 399 }
 400
 401 static bool is_target_alive(struct target *_target,
 402                             struct perf_thread_map *threads)
 403 {
 404         struct stat st;
 405         int i;
 406
 407         if (!target__has_task(_target))
 408                 return true;
 409
 410         for (i = 0; i < threads->nr; i++) {
 411                 char path[PATH_MAX];
 412
 413                 scnprintf(path, PATH_MAX, "%s/%d", procfs__mountpoint(),
 414                           threads->map[i].pid);
 415
 416                 if (!stat(path, &st))
 417                         return true;
 418         }
 419
 420         return false;
 421 }
 422
 423 static int __run_perf_stat(int argc, const char **argv, int run_idx)
 424 {
 425         int interval = stat_config.interval;
 426         int times = stat_config.times;
 427         int timeout = stat_config.timeout;
 428         char msg[BUFSIZ];
 429         unsigned long long t0, t1;
 430         struct evsel *counter;
 431         struct timespec ts;
 432         size_t l;
 433         int status = 0;
 434         const bool forks = (argc > 0);
 435         bool is_pipe = STAT_RECORD ? perf_stat.data.is_pipe : false;
 436
 437         if (interval) {
 438                 ts.tv_sec  = interval / USEC_PER_MSEC;
 439                 ts.tv_nsec = (interval % USEC_PER_MSEC) * NSEC_PER_MSEC;
 440         } else if (timeout) {
 441                 ts.tv_sec  = timeout / USEC_PER_MSEC;
 442                 ts.tv_nsec = (timeout % USEC_PER_MSEC) * NSEC_PER_MSEC;
 443         } else {
 444                 ts.tv_sec  = 1;
 445                 ts.tv_nsec = 0;
 446         }
 447
 448         if (forks) {
 449                 if (perf_evlist__prepare_workload(evsel_list, &target, argv, is_pipe,
 450                                                   workload_exec_failed_signal) < 0) {
 451                         perror("failed to prepare workload");
 452                         return -1;
 453                 }
 454                 child_pid = evsel_list->workload.pid;
 455         }
 456
 457         if (group)
 458                 perf_evlist__set_leader(evsel_list);
 459
 460         evlist__for_each_entry(evsel_list, counter) {
 461 try_again:
 462                 if (create_perf_stat_counter(counter, &stat_config, &target) < 0) {
 463
 464                         /* Weak group failed. Reset the group. */
 465                         if ((errno == EINVAL || errno == EBADF) &&
 466                             counter->leader != counter &&
 467                             counter->weak_group) {
 468                                 counter = perf_evlist__reset_weak_group(evsel_list, counter);
 469                                 goto try_again;
 470                         }
 471
 472                         /*
 473                          * PPC returns ENXIO for HW counters until 2.6.37
 474                          * (behavior changed with commit b0a873e).
 475                          */
 476                         if (errno == EINVAL || errno == ENOSYS ||
 477                             errno == ENOENT || errno == EOPNOTSUPP ||
 478                             errno == ENXIO) {
 479                                 if (verbose > 0)
 480                                         ui__warning("%s event is not supported by the kernel.\n",
 481                                                     perf_evsel__name(counter));
 482                                 counter->supported = false;
 483
 484                                 if ((counter->leader != counter) ||
 485                                     !(counter->leader->core.nr_members > 1))
 486                                         continue;
 487                         } else if (perf_evsel__fallback(counter, errno, msg, sizeof(msg))) {
 488                                 if (verbose > 0)
 489                                         ui__warning("%s\n", msg);
 490                                 goto try_again;
 491                         } else if (target__has_per_thread(&target) &&
 492                                    evsel_list->core.threads &&
 493                                    evsel_list->core.threads->err_thread != -1) {
 494                                 /*
 495                                  * For global --per-thread case, skip current
 496                                  * error thread.
 497                                  */
 498                                 if (!thread_map__remove(evsel_list->core.threads,
 499                                                         evsel_list->core.threads->err_thread)) {
 500                                         evsel_list->core.threads->err_thread = -1;
 501                                         goto try_again;
 502                                 }
 503                         }
 504
 505                         perf_evsel__open_strerror(counter, &target,
 506                                                   errno, msg, sizeof(msg));
 507                         ui__error("%s\n", msg);
 508
 509                         if (child_pid != -1)
 510                                 kill(child_pid, SIGTERM);
 511
 512                         return -1;
 513                 }
 514                 counter->supported = true;
 515
 516                 l = strlen(counter->unit);
 517                 if (l > stat_config.unit_width)
 518                         stat_config.unit_width = l;
 519
 520                 if (perf_evsel__should_store_id(counter) &&
 521                     perf_evsel__store_ids(counter, evsel_list))
 522                         return -1;
 523         }
 524
 525         if (perf_evlist__apply_filters(evsel_list, &counter)) {
 526                 pr_err("failed to set filter \"%s\" on event %s with %d (%s)\n",
 527                         counter->filter, perf_evsel__name(counter), errno,
 528                         str_error_r(errno, msg, sizeof(msg)));
 529                 return -1;
 530         }
 531
 532         if (STAT_RECORD) {
 533                 int err, fd = perf_data__fd(&perf_stat.data);
 534
 535                 if (is_pipe) {
 536                         err = perf_header__write_pipe(perf_data__fd(&perf_stat.data));
 537                 } else {
 538                         err = perf_session__write_header(perf_stat.session, evsel_list,
 539                                                          fd, false);
 540                 }
 541
 542                 if (err < 0)
 543                         return err;
 544
 545                 err = perf_event__synthesize_stat_events(&stat_config, NULL, evsel_list,
 546                                                          process_synthesized_event, is_pipe);
 547                 if (err < 0)
 548                         return err;
 549         }
 550
 551         /*
 552          * Enable counters and exec the command:
 553          */
 554         t0 = rdclock();
 555         clock_gettime(CLOCK_MONOTONIC, &ref_time);
 556
 557         if (forks) {
 558                 perf_evlist__start_workload(evsel_list);
 559                 enable_counters();
 560
 561                 if (interval || timeout) {
 562                         while (!waitpid(child_pid, &status, WNOHANG)) {
 563                                 nanosleep(&ts, NULL);
 564                                 if (timeout)
 565                                         break;
 566                                 process_interval();
 567                                 if (interval_count && !(--times))
 568                                         break;
 569                         }
 570                 }
 571                 if (child_pid != -1)
 572                         wait4(child_pid, &status, 0, &stat_config.ru_data);
 573
 574                 if (workload_exec_errno) {
 575                         const char *emsg = str_error_r(workload_exec_errno, msg, sizeof(msg));
 576                         pr_err("Workload failed: %s\n", emsg);
 577                         return -1;
 578                 }
 579
 580                 if (WIFSIGNALED(status))
 581                         psignal(WTERMSIG(status), argv[0]);
 582         } else {
 583                 enable_counters();
 584                 while (!done) {
 585                         nanosleep(&ts, NULL);
 586                         if (!is_target_alive(&target, evsel_list->core.threads))
 587                                 break;
 588                         if (timeout)
 589                                 break;
 590                         if (interval) {
 591                                 process_interval();
 592                                 if (interval_count && !(--times))
 593                                         break;
 594                         }
 595                 }
 596         }
 597
 598         disable_counters();
 599
 600         t1 = rdclock();
 601
 602         if (stat_config.walltime_run_table)
 603                 stat_config.walltime_run[run_idx] = t1 - t0;
 604
 605         update_stats(&walltime_nsecs_stats, t1 - t0);
 606
 607         /*
 608          * Closing a group leader splits the group, and as we only disable
 609          * group leaders, results in remaining events becoming enabled. To
 610          * avoid arbitrary skew, we must read all counters before closing any
 611          * group leaders.
 612          */
 613         read_counters(&(struct timespec) { .tv_nsec = t1-t0 });
 614
 615         /*
 616          * We need to keep evsel_list alive, because it's processed
 617          * later the evsel_list will be closed after.
 618          */
 619         if (!STAT_RECORD)
 620                 evlist__close(evsel_list);
 621
 622         return WEXITSTATUS(status);
 623 }
 624
 625 static int run_perf_stat(int argc, const char **argv, int run_idx)
 626 {
 627         int ret;
 628
 629         if (pre_cmd) {
 630                 ret = system(pre_cmd);
 631                 if (ret)
 632                         return ret;
 633         }
 634
 635         if (sync_run)
 636                 sync();
 637
 638         ret = __run_perf_stat(argc, argv, run_idx);
 639         if (ret)
 640                 return ret;
 641
 642         if (post_cmd) {
 643                 ret = system(post_cmd);
 644                 if (ret)
 645                         return ret;
 646         }
 647
 648         return ret;
 649 }
 650
 651 static void print_counters(struct timespec *ts, int argc, const char **argv)
 652 {
 653         /* Do not print anything if we record to the pipe. */
 654         if (STAT_RECORD && perf_stat.data.is_pipe)
 655                 return;
 656
 657         perf_evlist__print_counters(evsel_list, &stat_config, &target,
 658                                     ts, argc, argv);
 659 }
 660
 661 static volatile int signr = -1;
 662
 663 static void skip_signal(int signo)
 664 {
 665         if ((child_pid == -1) || stat_config.interval)
 666                 done = 1;
 667
 668         signr = signo;
 669         /*
 670          * render child_pid harmless
 671          * won't send SIGTERM to a random
 672          * process in case of race condition
 673          * and fast PID recycling
 674          */
 675         child_pid = -1;
 676 }
 677
 678 static void sig_atexit(void)
 679 {
 680         sigset_t set, oset;
 681
 682         /*
 683          * avoid race condition with SIGCHLD handler
 684          * in skip_signal() which is modifying child_pid
 685          * goal is to avoid send SIGTERM to a random
 686          * process
 687          */
 688         sigemptyset(&set);
 689         sigaddset(&set, SIGCHLD);
 690         sigprocmask(SIG_BLOCK, &set, &oset);
 691
 692         if (child_pid != -1)
 693                 kill(child_pid, SIGTERM);
 694
 695         sigprocmask(SIG_SETMASK, &oset, NULL);
 696
 697         if (signr == -1)
 698                 return;
 699
 700         signal(signr, SIG_DFL);
 701         kill(getpid(), signr);
 702 }
 703
 704 static int stat__set_big_num(const struct option *opt __maybe_unused,
 705                              const char *s __maybe_unused, int unset)
 706 {
 707         big_num_opt = unset ? 0 : 1;
 708         return 0;
 709 }
 710
 711 static int enable_metric_only(const struct option *opt __maybe_unused,
 712                               const char *s __maybe_unused, int unset)
 713 {
 714         force_metric_only = true;
 715         stat_config.metric_only = !unset;
 716         return 0;
 717 }
 718
 719 static int parse_metric_groups(const struct option *opt,
 720                                const char *str,
 721                                int unset __maybe_unused)
 722 {
 723         return metricgroup__parse_groups(opt, str, &stat_config.metric_events);
 724 }
 725
 726 static struct option stat_options[] = {
 727         OPT_BOOLEAN('T', "transaction", &transaction_run,
 728                     "hardware transaction statistics"),
 729         OPT_CALLBACK('e', "event", &evsel_list, "event",
 730                      "event selector. use 'perf list' to list available events",
 731                      parse_events_option),
 732         OPT_CALLBACK(0, "filter", &evsel_list, "filter",
 733                      "event filter", parse_filter),
 734         OPT_BOOLEAN('i', "no-inherit", &stat_config.no_inherit,
 735                     "child tasks do not inherit counters"),
 736         OPT_STRING('p', "pid", &target.pid, "pid",
 737                    "stat events on existing process id"),
 738         OPT_STRING('t', "tid", &target.tid, "tid",
 739                    "stat events on existing thread id"),
 740         OPT_BOOLEAN('a', "all-cpus", &target.system_wide,
 741                     "system-wide collection from all CPUs"),
 742         OPT_BOOLEAN('g', "group", &group,
 743                     "put the counters into a counter group"),
 744         OPT_BOOLEAN(0, "scale", &stat_config.scale,
 745                     "Use --no-scale to disable counter scaling for multiplexing"),
 746         OPT_INCR('v', "verbose", &verbose,
 747                     "be more verbose (show counter open errors, etc)"),
 748         OPT_INTEGER('r', "repeat", &stat_config.run_count,
 749                     "repeat command and print average + stddev (max: 100, forever: 0)"),
 750         OPT_BOOLEAN(0, "table", &stat_config.walltime_run_table,
 751                     "display details about each run (only with -r option)"),
 752         OPT_BOOLEAN('n', "null", &stat_config.null_run,
 753                     "null run - dont start any counters"),
 754         OPT_INCR('d', "detailed", &detailed_run,
 755                     "detailed run - start a lot of events"),
 756         OPT_BOOLEAN('S', "sync", &sync_run,
 757                     "call sync() before starting a run"),
 758         OPT_CALLBACK_NOOPT('B', "big-num", NULL, NULL,
 759                            "print large numbers with thousands\' separators",
 760                            stat__set_big_num),
 761         OPT_STRING('C', "cpu", &target.cpu_list, "cpu",
 762                     "list of cpus to monitor in system-wide"),
 763         OPT_SET_UINT('A', "no-aggr", &stat_config.aggr_mode,
 764                     "disable CPU count aggregation", AGGR_NONE),
 765         OPT_BOOLEAN(0, "no-merge", &stat_config.no_merge, "Do not merge identical named events"),
 766         OPT_STRING('x', "field-separator", &stat_config.csv_sep, "separator",
 767                    "print counts with custom separator"),
 768         OPT_CALLBACK('G', "cgroup", &evsel_list, "name",
 769                      "monitor event in cgroup name only", parse_cgroups),
 770         OPT_STRING('o', "output", &output_name, "file", "output file name"),
 771         OPT_BOOLEAN(0, "append", &append_file, "append to the output file"),
 772         OPT_INTEGER(0, "log-fd", &output_fd,
 773                     "log output to fd, instead of stderr"),
 774         OPT_STRING(0, "pre", &pre_cmd, "command",
 775                         "command to run prior to the measured command"),
 776         OPT_STRING(0, "post", &post_cmd, "command",
 777                         "command to run after to the measured command"),
 778         OPT_UINTEGER('I', "interval-print", &stat_config.interval,
 779                     "print counts at regular interval in ms "
 780                     "(overhead is possible for values <= 100ms)"),
 781         OPT_INTEGER(0, "interval-count", &stat_config.times,
 782                     "print counts for fixed number of times"),
 783         OPT_BOOLEAN(0, "interval-clear", &stat_config.interval_clear,
 784                     "clear screen in between new interval"),
 785         OPT_UINTEGER(0, "timeout", &stat_config.timeout,
 786                     "stop workload and print counts after a timeout period in ms (>= 10ms)"),
 787         OPT_SET_UINT(0, "per-socket", &stat_config.aggr_mode,
 788                      "aggregate counts per processor socket", AGGR_SOCKET),
 789         OPT_SET_UINT(0, "per-die", &stat_config.aggr_mode,
 790                      "aggregate counts per processor die", AGGR_DIE),
 791         OPT_SET_UINT(0, "per-core", &stat_config.aggr_mode,
 792                      "aggregate counts per physical processor core", AGGR_CORE),
 793         OPT_SET_UINT(0, "per-thread", &stat_config.aggr_mode,
 794                      "aggregate counts per thread", AGGR_THREAD),
 795         OPT_UINTEGER('D', "delay", &stat_config.initial_delay,
 796                      "ms to wait before starting measurement after program start"),
 797         OPT_CALLBACK_NOOPT(0, "metric-only", &stat_config.metric_only, NULL,
 798                         "Only print computed metrics. No raw values", enable_metric_only),
 799         OPT_BOOLEAN(0, "topdown", &topdown_run,
 800                         "measure topdown level 1 statistics"),
 801         OPT_BOOLEAN(0, "smi-cost", &smi_cost,
 802                         "measure SMI cost"),
 803         OPT_CALLBACK('M', "metrics", &evsel_list, "metric/metric group list",
 804                      "monitor specified metrics or metric groups (separated by ,)",
 805                      parse_metric_groups),
 806         OPT_END()
 807 };
 808
 809 static int perf_stat__get_socket(struct perf_stat_config *config __maybe_unused,
 810                                  struct perf_cpu_map *map, int cpu)
 811 {
 812         return cpu_map__get_socket(map, cpu, NULL);
 813 }
 814
 815 static int perf_stat__get_die(struct perf_stat_config *config __maybe_unused,
 816                               struct perf_cpu_map *map, int cpu)
 817 {
 818         return cpu_map__get_die(map, cpu, NULL);
 819 }
 820
 821 static int perf_stat__get_core(struct perf_stat_config *config __maybe_unused,
 822                                struct perf_cpu_map *map, int cpu)
 823 {
 824         return cpu_map__get_core(map, cpu, NULL);
 825 }
 826
 827 static int perf_stat__get_aggr(struct perf_stat_config *config,
 828                                aggr_get_id_t get_id, struct perf_cpu_map *map, int idx)
 829 {
 830         int cpu;
 831
 832         if (idx >= map->nr)
 833                 return -1;
 834
 835         cpu = map->map[idx];
 836
 837         if (config->cpus_aggr_map->map[cpu] == -1)
 838                 config->cpus_aggr_map->map[cpu] = get_id(config, map, idx);
 839
 840         return config->cpus_aggr_map->map[cpu];
 841 }
 842
 843 static int perf_stat__get_socket_cached(struct perf_stat_config *config,
 844                                         struct perf_cpu_map *map, int idx)
 845 {
 846         return perf_stat__get_aggr(config, perf_stat__get_socket, map, idx);
 847 }
 848
 849 static int perf_stat__get_die_cached(struct perf_stat_config *config,
 850                                         struct perf_cpu_map *map, int idx)
 851 {
 852         return perf_stat__get_aggr(config, perf_stat__get_die, map, idx);
 853 }
 854
 855 static int perf_stat__get_core_cached(struct perf_stat_config *config,
 856                                       struct perf_cpu_map *map, int idx)
 857 {
 858         return perf_stat__get_aggr(config, perf_stat__get_core, map, idx);
 859 }
 860
 861 static bool term_percore_set(void)
 862 {
 863         struct evsel *counter;
 864
 865         evlist__for_each_entry(evsel_list, counter) {
 866                 if (counter->percore)
 867                         return true;
 868         }
 869
 870         return false;
 871 }
 872
 873 static int perf_stat_init_aggr_mode(void)
 874 {
 875         int nr;
 876
 877         switch (stat_config.aggr_mode) {
 878         case AGGR_SOCKET:
 879                 if (cpu_map__build_socket_map(evsel_list->core.cpus, &stat_config.aggr_map)) {
 880                         perror("cannot build socket map");
 881                         return -1;
 882                 }
 883                 stat_config.aggr_get_id = perf_stat__get_socket_cached;
 884                 break;
 885         case AGGR_DIE:
 886                 if (cpu_map__build_die_map(evsel_list->core.cpus, &stat_config.aggr_map)) {
 887                         perror("cannot build die map");
 888                         return -1;
 889                 }
 890                 stat_config.aggr_get_id = perf_stat__get_die_cached;
 891                 break;
 892         case AGGR_CORE:
 893                 if (cpu_map__build_core_map(evsel_list->core.cpus, &stat_config.aggr_map)) {
 894                         perror("cannot build core map");
 895                         return -1;
 896                 }
 897                 stat_config.aggr_get_id = perf_stat__get_core_cached;
 898                 break;
 899         case AGGR_NONE:
 900                 if (term_percore_set()) {
 901                         if (cpu_map__build_core_map(evsel_list->core.cpus,
 902                                                     &stat_config.aggr_map)) {
 903                                 perror("cannot build core map");
 904                                 return -1;
 905                         }
 906                         stat_config.aggr_get_id = perf_stat__get_core_cached;
 907                 }
 908                 break;
 909         case AGGR_GLOBAL:
 910         case AGGR_THREAD:
 911         case AGGR_UNSET:
 912         default:
 913                 break;
 914         }
 915
 916         /*
 917          * The evsel_list->cpus is the base we operate on,
 918          * taking the highest cpu number to be the size of
 919          * the aggregation translate cpumap.
 920          */
 921         nr = perf_cpu_map__max(evsel_list->core.cpus);
 922         stat_config.cpus_aggr_map = perf_cpu_map__empty_new(nr + 1);
 923         return stat_config.cpus_aggr_map ? 0 : -ENOMEM;
 924 }
 925
 926 static void perf_stat__exit_aggr_mode(void)
 927 {
 928         perf_cpu_map__put(stat_config.aggr_map);
 929         perf_cpu_map__put(stat_config.cpus_aggr_map);
 930         stat_config.aggr_map = NULL;
 931         stat_config.cpus_aggr_map = NULL;
 932 }
 933
 934 static inline int perf_env__get_cpu(struct perf_env *env, struct perf_cpu_map *map, int idx)
 935 {
 936         int cpu;
 937
 938         if (idx > map->nr)
 939                 return -1;
 940
 941         cpu = map->map[idx];
 942
 943         if (cpu >= env->nr_cpus_avail)
 944                 return -1;
 945
 946         return cpu;
 947 }
 948
 949 static int perf_env__get_socket(struct perf_cpu_map *map, int idx, void *data)
 950 {
 951         struct perf_env *env = data;
 952         int cpu = perf_env__get_cpu(env, map, idx);
 953
 954         return cpu == -1 ? -1 : env->cpu[cpu].socket_id;
 955 }
 956
 957 static int perf_env__get_die(struct perf_cpu_map *map, int idx, void *data)
 958 {
 959         struct perf_env *env = data;
 960         int die_id = -1, cpu = perf_env__get_cpu(env, map, idx);
 961
 962         if (cpu != -1) {
 963                 /*
 964                  * Encode socket in bit range 15:8
 965                  * die_id is relative to socket,
 966                  * we need a global id. So we combine
 967                  * socket + die id
 968                  */
 969                 if (WARN_ONCE(env->cpu[cpu].socket_id >> 8, "The socket id number is too big.\n"))
 970                         return -1;
 971
 972                 if (WARN_ONCE(env->cpu[cpu].die_id >> 8, "The die id number is too big.\n"))
 973                         return -1;
 974
 975                 die_id = (env->cpu[cpu].socket_id << 8) | (env->cpu[cpu].die_id & 0xff);
 976         }
 977
 978         return die_id;
 979 }
 980
 981 static int perf_env__get_core(struct perf_cpu_map *map, int idx, void *data)
 982 {
 983         struct perf_env *env = data;
 984         int core = -1, cpu = perf_env__get_cpu(env, map, idx);
 985
 986         if (cpu != -1) {
 987                 /*
 988                  * Encode socket in bit range 31:24
 989                  * encode die id in bit range 23:16
 990                  * core_id is relative to socket and die,
 991                  * we need a global id. So we combine
 992                  * socket + die id + core id
 993                  */
 994                 if (WARN_ONCE(env->cpu[cpu].socket_id >> 8, "The socket id number is too big.\n"))
 995                         return -1;
 996
 997                 if (WARN_ONCE(env->cpu[cpu].die_id >> 8, "The die id number is too big.\n"))
 998                         return -1;
 999
1000                 if (WARN_ONCE(env->cpu[cpu].core_id >> 16, "The core id number is too big.\n"))
1001                         return -1;
1002
1003                 core = (env->cpu[cpu].socket_id << 24) |
1004                        (env->cpu[cpu].die_id << 16) |
1005                        (env->cpu[cpu].core_id & 0xffff);
1006         }
1007
1008         return core;
1009 }
1010
1011 static int perf_env__build_socket_map(struct perf_env *env, struct perf_cpu_map *cpus,
1012                                       struct perf_cpu_map **sockp)
1013 {
1014         return cpu_map__build_map(cpus, sockp, perf_env__get_socket, env);
1015 }
1016
1017 static int perf_env__build_die_map(struct perf_env *env, struct perf_cpu_map *cpus,
1018                                    struct perf_cpu_map **diep)
1019 {
1020         return cpu_map__build_map(cpus, diep, perf_env__get_die, env);
1021 }
1022
1023 static int perf_env__build_core_map(struct perf_env *env, struct perf_cpu_map *cpus,
1024                                     struct perf_cpu_map **corep)
1025 {
1026         return cpu_map__build_map(cpus, corep, perf_env__get_core, env);
1027 }
1028
1029 static int perf_stat__get_socket_file(struct perf_stat_config *config __maybe_unused,
1030                                       struct perf_cpu_map *map, int idx)
1031 {
1032         return perf_env__get_socket(map, idx, &perf_stat.session->header.env);
1033 }
1034 static int perf_stat__get_die_file(struct perf_stat_config *config __maybe_unused,
1035                                    struct perf_cpu_map *map, int idx)
1036 {
1037         return perf_env__get_die(map, idx, &perf_stat.session->header.env);
1038 }
1039
1040 static int perf_stat__get_core_file(struct perf_stat_config *config __maybe_unused,
1041                                     struct perf_cpu_map *map, int idx)
1042 {
1043         return perf_env__get_core(map, idx, &perf_stat.session->header.env);
1044 }
1045
1046 static int perf_stat_init_aggr_mode_file(struct perf_stat *st)
1047 {
1048         struct perf_env *env = &st->session->header.env;
1049
1050         switch (stat_config.aggr_mode) {
1051         case AGGR_SOCKET:
1052                 if (perf_env__build_socket_map(env, evsel_list->core.cpus, &stat_config.aggr_map)) {
1053                         perror("cannot build socket map");
1054                         return -1;
1055                 }
1056                 stat_config.aggr_get_id = perf_stat__get_socket_file;
1057                 break;
1058         case AGGR_DIE:
1059                 if (perf_env__build_die_map(env, evsel_list->core.cpus, &stat_config.aggr_map)) {
1060                         perror("cannot build die map");
1061                         return -1;
1062                 }
1063                 stat_config.aggr_get_id = perf_stat__get_die_file;
1064                 break;
1065         case AGGR_CORE:
1066                 if (perf_env__build_core_map(env, evsel_list->core.cpus, &stat_config.aggr_map)) {
1067                         perror("cannot build core map");
1068                         return -1;
1069                 }
1070                 stat_config.aggr_get_id = perf_stat__get_core_file;
1071                 break;
1072         case AGGR_NONE:
1073         case AGGR_GLOBAL:
1074         case AGGR_THREAD:
1075         case AGGR_UNSET:
1076         default:
1077                 break;
1078         }
1079
1080         return 0;
1081 }
1082
1083 static int topdown_filter_events(const char **attr, char **str, bool use_group)
1084 {
1085         int off = 0;
1086         int i;
1087         int len = 0;
1088         char *s;
1089
1090         for (i = 0; attr[i]; i++) {
1091                 if (pmu_have_event("cpu", attr[i])) {
1092                         len += strlen(attr[i]) + 1;
1093                         attr[i - off] = attr[i];
1094                 } else
1095                         off++;
1096         }
1097         attr[i - off] = NULL;
1098
1099         *str = malloc(len + 1 + 2);
1100         if (!*str)
1101                 return -1;
1102         s = *str;
1103         if (i - off == 0) {
1104                 *s = 0;
1105                 return 0;
1106         }
1107         if (use_group)
1108                 *s++ = '{';
1109         for (i = 0; attr[i]; i++) {
1110                 strcpy(s, attr[i]);
1111                 s += strlen(s);
1112                 *s++ = ',';
1113         }
1114         if (use_group) {
1115                 s[-1] = '}';
1116                 *s = 0;
1117         } else
1118                 s[-1] = 0;
1119         return 0;
1120 }
1121
1122 __weak bool arch_topdown_check_group(bool *warn)
1123 {
1124         *warn = false;
1125         return false;
1126 }
1127
1128 __weak void arch_topdown_group_warn(void)
1129 {
1130 }
1131
1132 /*
1133  * Add default attributes, if there were no attributes specified or
1134  * if -d/--detailed, -d -d or -d -d -d is used:
1135  */
1136 static int add_default_attributes(void)
1137 {
1138         int err;
1139         struct perf_event_attr default_attrs0[] = {
1140
1141   { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_TASK_CLOCK              },
1142   { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_CONTEXT_SWITCHES        },
1143   { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_CPU_MIGRATIONS          },
1144   { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_PAGE_FAULTS             },
1145
1146   { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_CPU_CYCLES              },
1147 };
1148         struct perf_event_attr frontend_attrs[] = {
1149   { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_STALLED_CYCLES_FRONTEND },
1150 };
1151         struct perf_event_attr backend_attrs[] = {
1152   { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_STALLED_CYCLES_BACKEND  },
1153 };
1154         struct perf_event_attr default_attrs1[] = {
1155   { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_INSTRUCTIONS            },
1156   { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_BRANCH_INSTRUCTIONS     },
1157   { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_BRANCH_MISSES           },
1158
1159 };
1160
1161 /*
1162  * Detailed stats (-d), covering the L1 and last level data caches:
1163  */
1164         struct perf_event_attr detailed_attrs[] = {
1165
1166   { .type = PERF_TYPE_HW_CACHE,
1167     .config =
1168          PERF_COUNT_HW_CACHE_L1D                <<  0  |
1169         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
1170         (PERF_COUNT_HW_CACHE_RESULT_ACCESS      << 16)                          },
1171
1172   { .type = PERF_TYPE_HW_CACHE,
1173     .config =
1174          PERF_COUNT_HW_CACHE_L1D                <<  0  |
1175         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
1176         (PERF_COUNT_HW_CACHE_RESULT_MISS        << 16)                          },
1177
1178   { .type = PERF_TYPE_HW_CACHE,
1179     .config =
1180          PERF_COUNT_HW_CACHE_LL                 <<  0  |
1181         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
1182         (PERF_COUNT_HW_CACHE_RESULT_ACCESS      << 16)                          },
1183
1184   { .type = PERF_TYPE_HW_CACHE,
1185     .config =
1186          PERF_COUNT_HW_CACHE_LL                 <<  0  |
1187         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
1188         (PERF_COUNT_HW_CACHE_RESULT_MISS        << 16)                          },
1189 };
1190
1191 /*
1192  * Very detailed stats (-d -d), covering the instruction cache and the TLB caches:
1193  */
1194         struct perf_event_attr very_detailed_attrs[] = {
1195
1196   { .type = PERF_TYPE_HW_CACHE,
1197     .config =
1198          PERF_COUNT_HW_CACHE_L1I                <<  0  |
1199         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
1200         (PERF_COUNT_HW_CACHE_RESULT_ACCESS      << 16)                          },
1201
1202   { .type = PERF_TYPE_HW_CACHE,
1203     .config =
1204          PERF_COUNT_HW_CACHE_L1I                <<  0  |
1205         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
1206         (PERF_COUNT_HW_CACHE_RESULT_MISS        << 16)                          },
1207
1208   { .type = PERF_TYPE_HW_CACHE,
1209     .config =
1210          PERF_COUNT_HW_CACHE_DTLB               <<  0  |
1211         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
1212         (PERF_COUNT_HW_CACHE_RESULT_ACCESS      << 16)                          },
1213
1214   { .type = PERF_TYPE_HW_CACHE,
1215     .config =
1216          PERF_COUNT_HW_CACHE_DTLB               <<  0  |
1217         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
1218         (PERF_COUNT_HW_CACHE_RESULT_MISS        << 16)                          },
1219
1220   { .type = PERF_TYPE_HW_CACHE,
1221     .config =
1222          PERF_COUNT_HW_CACHE_ITLB               <<  0  |
1223         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
1224         (PERF_COUNT_HW_CACHE_RESULT_ACCESS      << 16)                          },
1225
1226   { .type = PERF_TYPE_HW_CACHE,
1227     .config =
1228          PERF_COUNT_HW_CACHE_ITLB               <<  0  |
1229         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
1230         (PERF_COUNT_HW_CACHE_RESULT_MISS        << 16)                          },
1231
1232 };
1233
1234 /*
1235  * Very, very detailed stats (-d -d -d), adding prefetch events:
1236  */
1237         struct perf_event_attr very_very_detailed_attrs[] = {
1238
1239   { .type = PERF_TYPE_HW_CACHE,
1240     .config =
1241          PERF_COUNT_HW_CACHE_L1D                <<  0  |
1242         (PERF_COUNT_HW_CACHE_OP_PREFETCH        <<  8) |
1243         (PERF_COUNT_HW_CACHE_RESULT_ACCESS      << 16)                          },
1244
1245   { .type = PERF_TYPE_HW_CACHE,
1246     .config =
1247          PERF_COUNT_HW_CACHE_L1D                <<  0  |
1248         (PERF_COUNT_HW_CACHE_OP_PREFETCH        <<  8) |
1249         (PERF_COUNT_HW_CACHE_RESULT_MISS        << 16)                          },
1250 };
1251         struct parse_events_error errinfo;
1252
1253         /* Set attrs if no event is selected and !null_run: */
1254         if (stat_config.null_run)
1255                 return 0;
1256
1257         if (transaction_run) {
1258                 /* Handle -T as -M transaction. Once platform specific metrics
1259                  * support has been added to the json files, all archictures
1260                  * will use this approach. To determine transaction support
1261                  * on an architecture test for such a metric name.
1262                  */
1263                 if (metricgroup__has_metric("transaction")) {
1264                         struct option opt = { .value = &evsel_list };
1265
1266                         return metricgroup__parse_groups(&opt, "transaction",
1267                                                          &stat_config.metric_events);
1268                 }
1269
1270                 if (pmu_have_event("cpu", "cycles-ct") &&
1271                     pmu_have_event("cpu", "el-start"))
1272                         err = parse_events(evsel_list, transaction_attrs,
1273                                            &errinfo);
1274                 else
1275                         err = parse_events(evsel_list,
1276                                            transaction_limited_attrs,
1277                                            &errinfo);
1278                 if (err) {
1279                         fprintf(stderr, "Cannot set up transaction events\n");
1280                         parse_events_print_error(&errinfo, transaction_attrs);
1281                         return -1;
1282                 }
1283                 return 0;
1284         }
1285
1286         if (smi_cost) {
1287                 int smi;
1288
1289                 if (sysfs__read_int(FREEZE_ON_SMI_PATH, &smi) < 0) {
1290                         fprintf(stderr, "freeze_on_smi is not supported.\n");
1291                         return -1;
1292                 }
1293
1294                 if (!smi) {
1295                         if (sysfs__write_int(FREEZE_ON_SMI_PATH, 1) < 0) {
1296                                 fprintf(stderr, "Failed to set freeze_on_smi.\n");
1297                                 return -1;
1298                         }
1299                         smi_reset = true;
1300                 }
1301
1302                 if (pmu_have_event("msr", "aperf") &&
1303                     pmu_have_event("msr", "smi")) {
1304                         if (!force_metric_only)
1305                                 stat_config.metric_only = true;
1306                         err = parse_events(evsel_list, smi_cost_attrs, &errinfo);
1307                 } else {
1308                         fprintf(stderr, "To measure SMI cost, it needs "
1309                                 "msr/aperf/, msr/smi/ and cpu/cycles/ support\n");
1310                         parse_events_print_error(&errinfo, smi_cost_attrs);
1311                         return -1;
1312                 }
1313                 if (err) {
1314                         fprintf(stderr, "Cannot set up SMI cost events\n");
1315                         return -1;
1316                 }
1317                 return 0;
1318         }
1319
1320         if (topdown_run) {
1321                 char *str = NULL;
1322                 bool warn = false;
1323
1324                 if (stat_config.aggr_mode != AGGR_GLOBAL &&
1325                     stat_config.aggr_mode != AGGR_CORE) {
1326                         pr_err("top down event configuration requires --per-core mode\n");
1327                         return -1;
1328                 }
1329                 stat_config.aggr_mode = AGGR_CORE;
1330                 if (nr_cgroups || !target__has_cpu(&target)) {
1331                         pr_err("top down event configuration requires system-wide mode (-a)\n");
1332                         return -1;
1333                 }
1334
1335                 if (!force_metric_only)
1336                         stat_config.metric_only = true;
1337                 if (topdown_filter_events(topdown_attrs, &str,
1338                                 arch_topdown_check_group(&warn)) < 0) {
1339                         pr_err("Out of memory\n");
1340                         return -1;
1341                 }
1342                 if (topdown_attrs[0] && str) {
1343                         if (warn)
1344                                 arch_topdown_group_warn();
1345                         err = parse_events(evsel_list, str, &errinfo);
1346                         if (err) {
1347                                 fprintf(stderr,
1348                                         "Cannot set up top down events %s: %d\n",
1349                                         str, err);
1350                                 parse_events_print_error(&errinfo, str);
1351                                 free(str);
1352                                 return -1;
1353                         }
1354                 } else {
1355                         fprintf(stderr, "System does not support topdown\n");
1356                         return -1;
1357                 }
1358                 free(str);
1359         }
1360
1361         if (!evsel_list->core.nr_entries) {
1362                 if (target__has_cpu(&target))
1363                         default_attrs0[0].config = PERF_COUNT_SW_CPU_CLOCK;
1364
1365                 if (perf_evlist__add_default_attrs(evsel_list, default_attrs0) < 0)
1366                         return -1;
1367                 if (pmu_have_event("cpu", "stalled-cycles-frontend")) {
1368                         if (perf_evlist__add_default_attrs(evsel_list,
1369                                                 frontend_attrs) < 0)
1370                                 return -1;
1371                 }
1372                 if (pmu_have_event("cpu", "stalled-cycles-backend")) {
1373                         if (perf_evlist__add_default_attrs(evsel_list,
1374                                                 backend_attrs) < 0)
1375                                 return -1;
1376                 }
1377                 if (perf_evlist__add_default_attrs(evsel_list, default_attrs1) < 0)
1378                         return -1;
1379         }
1380
1381         /* Detailed events get appended to the event list: */
1382
1383         if (detailed_run <  1)
1384                 return 0;
1385
1386         /* Append detailed run extra attributes: */
1387         if (perf_evlist__add_default_attrs(evsel_list, detailed_attrs) < 0)
1388                 return -1;
1389
1390         if (detailed_run < 2)
1391                 return 0;
1392
1393         /* Append very detailed run extra attributes: */
1394         if (perf_evlist__add_default_attrs(evsel_list, very_detailed_attrs) < 0)
1395                 return -1;
1396
1397         if (detailed_run < 3)
1398                 return 0;
1399
1400         /* Append very, very detailed run extra attributes: */
1401         return perf_evlist__add_default_attrs(evsel_list, very_very_detailed_attrs);
1402 }
1403
1404 static const char * const stat_record_usage[] = {
1405         "perf stat record [<options>]",
1406         NULL,
1407 };
1408
1409 static void init_features(struct perf_session *session)
1410 {
1411         int feat;
1412
1413         for (feat = HEADER_FIRST_FEATURE; feat < HEADER_LAST_FEATURE; feat++)
1414                 perf_header__set_feat(&session->header, feat);
1415
1416         perf_header__clear_feat(&session->header, HEADER_DIR_FORMAT);
1417         perf_header__clear_feat(&session->header, HEADER_BUILD_ID);
1418         perf_header__clear_feat(&session->header, HEADER_TRACING_DATA);
1419         perf_header__clear_feat(&session->header, HEADER_BRANCH_STACK);
1420         perf_header__clear_feat(&session->header, HEADER_AUXTRACE);
1421 }
1422
1423 static int __cmd_record(int argc, const char **argv)
1424 {
1425         struct perf_session *session;
1426         struct perf_data *data = &perf_stat.data;
1427
1428         argc = parse_options(argc, argv, stat_options, stat_record_usage,
1429                              PARSE_OPT_STOP_AT_NON_OPTION);
1430
1431         if (output_name)
1432                 data->path = output_name;
1433
1434         if (stat_config.run_count != 1 || forever) {
1435                 pr_err("Cannot use -r option with perf stat record.\n");
1436                 return -1;
1437         }
1438
1439         session = perf_session__new(data, false, NULL);
1440         if (IS_ERR(session)) {
1441                 pr_err("Perf session creation failed\n");
1442                 return PTR_ERR(session);
1443         }
1444
1445         init_features(session);
1446
1447         session->evlist   = evsel_list;
1448         perf_stat.session = session;
1449         perf_stat.record  = true;
1450         return argc;
1451 }
1452
1453 static int process_stat_round_event(struct perf_session *session,
1454                                     union perf_event *event)
1455 {
1456         struct perf_record_stat_round *stat_round = &event->stat_round;
1457         struct evsel *counter;
1458         struct timespec tsh, *ts = NULL;
1459         const char **argv = session->header.env.cmdline_argv;
1460         int argc = session->header.env.nr_cmdline;
1461
1462         evlist__for_each_entry(evsel_list, counter)
1463                 perf_stat_process_counter(&stat_config, counter);
1464
1465         if (stat_round->type == PERF_STAT_ROUND_TYPE__FINAL)
1466                 update_stats(&walltime_nsecs_stats, stat_round->time);
1467
1468         if (stat_config.interval && stat_round->time) {
1469                 tsh.tv_sec  = stat_round->time / NSEC_PER_SEC;
1470                 tsh.tv_nsec = stat_round->time % NSEC_PER_SEC;
1471                 ts = &tsh;
1472         }
1473
1474         print_counters(ts, argc, argv);
1475         return 0;
1476 }
1477
1478 static
1479 int process_stat_config_event(struct perf_session *session,
1480                               union perf_event *event)
1481 {
1482         struct perf_tool *tool = session->tool;
1483         struct perf_stat *st = container_of(tool, struct perf_stat, tool);
1484
1485         perf_event__read_stat_config(&stat_config, &event->stat_config);
1486
1487         if (perf_cpu_map__empty(st->cpus)) {
1488                 if (st->aggr_mode != AGGR_UNSET)
1489                         pr_warning("warning: processing task data, aggregation mode not set\n");
1490                 return 0;
1491         }
1492
1493         if (st->aggr_mode != AGGR_UNSET)
1494                 stat_config.aggr_mode = st->aggr_mode;
1495
1496         if (perf_stat.data.is_pipe)
1497                 perf_stat_init_aggr_mode();
1498         else
1499                 perf_stat_init_aggr_mode_file(st);
1500
1501         return 0;
1502 }
1503
1504 static int set_maps(struct perf_stat *st)
1505 {
1506         if (!st->cpus || !st->threads)
1507                 return 0;
1508
1509         if (WARN_ONCE(st->maps_allocated, "stats double allocation\n"))
1510                 return -EINVAL;
1511
1512         perf_evlist__set_maps(&evsel_list->core, st->cpus, st->threads);
1513
1514         if (perf_evlist__alloc_stats(evsel_list, true))
1515                 return -ENOMEM;
1516
1517         st->maps_allocated = true;
1518         return 0;
1519 }
1520
1521 static
1522 int process_thread_map_event(struct perf_session *session,
1523                              union perf_event *event)
1524 {
1525         struct perf_tool *tool = session->tool;
1526         struct perf_stat *st = container_of(tool, struct perf_stat, tool);
1527
1528         if (st->threads) {
1529                 pr_warning("Extra thread map event, ignoring.\n");
1530                 return 0;
1531         }
1532
1533         st->threads = thread_map__new_event(&event->thread_map);
1534         if (!st->threads)
1535                 return -ENOMEM;
1536
1537         return set_maps(st);
1538 }
1539
1540 static
1541 int process_cpu_map_event(struct perf_session *session,
1542                           union perf_event *event)
1543 {
1544         struct perf_tool *tool = session->tool;
1545         struct perf_stat *st = container_of(tool, struct perf_stat, tool);
1546         struct perf_cpu_map *cpus;
1547
1548         if (st->cpus) {
1549                 pr_warning("Extra cpu map event, ignoring.\n");
1550                 return 0;
1551         }
1552
1553         cpus = cpu_map__new_data(&event->cpu_map.data);
1554         if (!cpus)
1555                 return -ENOMEM;
1556
1557         st->cpus = cpus;
1558         return set_maps(st);
1559 }
1560
1561 static int runtime_stat_new(struct perf_stat_config *config, int nthreads)
1562 {
1563         int i;
1564
1565         config->stats = calloc(nthreads, sizeof(struct runtime_stat));
1566         if (!config->stats)
1567                 return -1;
1568
1569         config->stats_num = nthreads;
1570
1571         for (i = 0; i < nthreads; i++)
1572                 runtime_stat__init(&config->stats[i]);
1573
1574         return 0;
1575 }
1576
1577 static void runtime_stat_delete(struct perf_stat_config *config)
1578 {
1579         int i;
1580
1581         if (!config->stats)
1582                 return;
1583
1584         for (i = 0; i < config->stats_num; i++)
1585                 runtime_stat__exit(&config->stats[i]);
1586
1587         zfree(&config->stats);
1588 }
1589
1590 static const char * const stat_report_usage[] = {
1591         "perf stat report [<options>]",
1592         NULL,
1593 };
1594
1595 static struct perf_stat perf_stat = {
1596         .tool = {
1597                 .attr           = perf_event__process_attr,
1598                 .event_update   = perf_event__process_event_update,
1599                 .thread_map     = process_thread_map_event,
1600                 .cpu_map        = process_cpu_map_event,
1601                 .stat_config    = process_stat_config_event,
1602                 .stat           = perf_event__process_stat_event,
1603                 .stat_round     = process_stat_round_event,
1604         },
1605         .aggr_mode = AGGR_UNSET,
1606 };
1607
1608 static int __cmd_report(int argc, const char **argv)
1609 {
1610         struct perf_session *session;
1611         const struct option options[] = {
1612         OPT_STRING('i', "input", &input_name, "file", "input file name"),
1613         OPT_SET_UINT(0, "per-socket", &perf_stat.aggr_mode,
1614                      "aggregate counts per processor socket", AGGR_SOCKET),
1615         OPT_SET_UINT(0, "per-die", &perf_stat.aggr_mode,
1616                      "aggregate counts per processor die", AGGR_DIE),
1617         OPT_SET_UINT(0, "per-core", &perf_stat.aggr_mode,
1618                      "aggregate counts per physical processor core", AGGR_CORE),
1619         OPT_SET_UINT('A', "no-aggr", &perf_stat.aggr_mode,
1620                      "disable CPU count aggregation", AGGR_NONE),
1621         OPT_END()
1622         };
1623         struct stat st;
1624         int ret;
1625
1626         argc = parse_options(argc, argv, options, stat_report_usage, 0);
1627
1628         if (!input_name || !strlen(input_name)) {
1629                 if (!fstat(STDIN_FILENO, &st) && S_ISFIFO(st.st_mode))
1630                         input_name = "-";
1631                 else
1632                         input_name = "perf.data";
1633         }
1634
1635         perf_stat.data.path = input_name;
1636         perf_stat.data.mode = PERF_DATA_MODE_READ;
1637
1638         session = perf_session__new(&perf_stat.data, false, &perf_stat.tool);
1639         if (IS_ERR(session))
1640                 return PTR_ERR(session);
1641
1642         perf_stat.session  = session;
1643         stat_config.output = stderr;
1644         evsel_list         = session->evlist;
1645
1646         ret = perf_session__process_events(session);
1647         if (ret)
1648                 return ret;
1649
1650         perf_session__delete(session);
1651         return 0;
1652 }
1653
1654 static void setup_system_wide(int forks)
1655 {
1656         /*
1657          * Make system wide (-a) the default target if
1658          * no target was specified and one of following
1659          * conditions is met:
1660          *
1661          *   - there's no workload specified
1662          *   - there is workload specified but all requested
1663          *     events are system wide events
1664          */
1665         if (!target__none(&target))
1666                 return;
1667
1668         if (!forks)
1669                 target.system_wide = true;
1670         else {
1671                 struct evsel *counter;
1672
1673                 evlist__for_each_entry(evsel_list, counter) {
1674                         if (!counter->core.system_wide)
1675                                 return;
1676                 }
1677
1678                 if (evsel_list->core.nr_entries)
1679                         target.system_wide = true;
1680         }
1681 }
1682
1683 int cmd_stat(int argc, const char **argv)
1684 {
1685         const char * const stat_usage[] = {
1686                 "perf stat [<options>] [<command>]",
1687                 NULL
1688         };
1689         int status = -EINVAL, run_idx;
1690         const char *mode;
1691         FILE *output = stderr;
1692         unsigned int interval, timeout;
1693         const char * const stat_subcommands[] = { "record", "report" };
1694
1695         setlocale(LC_ALL, "");
1696
1697         evsel_list = evlist__new();
1698         if (evsel_list == NULL)
1699                 return -ENOMEM;
1700
1701         parse_events__shrink_config_terms();
1702
1703         /* String-parsing callback-based options would segfault when negated */
1704         set_option_flag(stat_options, 'e', "event", PARSE_OPT_NONEG);
1705         set_option_flag(stat_options, 'M', "metrics", PARSE_OPT_NONEG);
1706         set_option_flag(stat_options, 'G', "cgroup", PARSE_OPT_NONEG);
1707
1708         argc = parse_options_subcommand(argc, argv, stat_options, stat_subcommands,
1709                                         (const char **) stat_usage,
1710                                         PARSE_OPT_STOP_AT_NON_OPTION);
1711         perf_stat__collect_metric_expr(evsel_list);
1712         perf_stat__init_shadow_stats();
1713
1714         if (stat_config.csv_sep) {
1715                 stat_config.csv_output = true;
1716                 if (!strcmp(stat_config.csv_sep, "\\t"))
1717                         stat_config.csv_sep = "\t";
1718         } else
1719                 stat_config.csv_sep = DEFAULT_SEPARATOR;
1720
1721         if (argc && !strncmp(argv[0], "rec", 3)) {
1722                 argc = __cmd_record(argc, argv);
1723                 if (argc < 0)
1724                         return -1;
1725         } else if (argc && !strncmp(argv[0], "rep", 3))
1726                 return __cmd_report(argc, argv);
1727
1728         interval = stat_config.interval;
1729         timeout = stat_config.timeout;
1730
1731         /*
1732          * For record command the -o is already taken care of.
1733          */
1734         if (!STAT_RECORD && output_name && strcmp(output_name, "-"))
1735                 output = NULL;
1736
1737         if (output_name && output_fd) {
1738                 fprintf(stderr, "cannot use both --output and --log-fd\n");
1739                 parse_options_usage(stat_usage, stat_options, "o", 1);
1740                 parse_options_usage(NULL, stat_options, "log-fd", 0);
1741                 goto out;
1742         }
1743
1744         if (stat_config.metric_only && stat_config.aggr_mode == AGGR_THREAD) {
1745                 fprintf(stderr, "--metric-only is not supported with --per-thread\n");
1746                 goto out;
1747         }
1748
1749         if (stat_config.metric_only && stat_config.run_count > 1) {
1750                 fprintf(stderr, "--metric-only is not supported with -r\n");
1751                 goto out;
1752         }
1753
1754         if (stat_config.walltime_run_table && stat_config.run_count <= 1) {
1755                 fprintf(stderr, "--table is only supported with -r\n");
1756                 parse_options_usage(stat_usage, stat_options, "r", 1);
1757                 parse_options_usage(NULL, stat_options, "table", 0);
1758                 goto out;
1759         }
1760
1761         if (output_fd < 0) {
1762                 fprintf(stderr, "argument to --log-fd must be a > 0\n");
1763                 parse_options_usage(stat_usage, stat_options, "log-fd", 0);
1764                 goto out;
1765         }
1766
1767         if (!output) {
1768                 struct timespec tm;
1769                 mode = append_file ? "a" : "w";
1770
1771                 output = fopen(output_name, mode);
1772                 if (!output) {
1773                         perror("failed to create output file");
1774                         return -1;
1775                 }
1776                 clock_gettime(CLOCK_REALTIME, &tm);
1777                 fprintf(output, "# started on %s\n", ctime(&tm.tv_sec));
1778         } else if (output_fd > 0) {
1779                 mode = append_file ? "a" : "w";
1780                 output = fdopen(output_fd, mode);
1781                 if (!output) {
1782                         perror("Failed opening logfd");
1783                         return -errno;
1784                 }
1785         }
1786
1787         stat_config.output = output;
1788
1789         /*
1790          * let the spreadsheet do the pretty-printing
1791          */
1792         if (stat_config.csv_output) {
1793                 /* User explicitly passed -B? */
1794                 if (big_num_opt == 1) {
1795                         fprintf(stderr, "-B option not supported with -x\n");
1796                         parse_options_usage(stat_usage, stat_options, "B", 1);
1797                         parse_options_usage(NULL, stat_options, "x", 1);
1798                         goto out;
1799                 } else /* Nope, so disable big number formatting */
1800                         stat_config.big_num = false;
1801         } else if (big_num_opt == 0) /* User passed --no-big-num */
1802                 stat_config.big_num = false;
1803
1804         setup_system_wide(argc);
1805
1806         /*
1807          * Display user/system times only for single
1808          * run and when there's specified tracee.
1809          */
1810         if ((stat_config.run_count == 1) && target__none(&target))
1811                 stat_config.ru_display = true;
1812
1813         if (stat_config.run_count < 0) {
1814                 pr_err("Run count must be a positive number\n");
1815                 parse_options_usage(stat_usage, stat_options, "r", 1);
1816                 goto out;
1817         } else if (stat_config.run_count == 0) {
1818                 forever = true;
1819                 stat_config.run_count = 1;
1820         }
1821
1822         if (stat_config.walltime_run_table) {
1823                 stat_config.walltime_run = zalloc(stat_config.run_count * sizeof(stat_config.walltime_run[0]));
1824                 if (!stat_config.walltime_run) {
1825                         pr_err("failed to setup -r option");
1826                         goto out;
1827                 }
1828         }
1829
1830         if ((stat_config.aggr_mode == AGGR_THREAD) &&
1831                 !target__has_task(&target)) {
1832                 if (!target.system_wide || target.cpu_list) {
1833                         fprintf(stderr, "The --per-thread option is only "
1834                                 "available when monitoring via -p -t -a "
1835                                 "options or only --per-thread.\n");
1836                         parse_options_usage(NULL, stat_options, "p", 1);
1837                         parse_options_usage(NULL, stat_options, "t", 1);
1838                         goto out;
1839                 }
1840         }
1841
1842         /*
1843          * no_aggr, cgroup are for system-wide only
1844          * --per-thread is aggregated per thread, we dont mix it with cpu mode
1845          */
1846         if (((stat_config.aggr_mode != AGGR_GLOBAL &&
1847               stat_config.aggr_mode != AGGR_THREAD) || nr_cgroups) &&
1848             !target__has_cpu(&target)) {
1849                 fprintf(stderr, "both cgroup and no-aggregation "
1850                         "modes only available in system-wide mode\n");
1851
1852                 parse_options_usage(stat_usage, stat_options, "G", 1);
1853                 parse_options_usage(NULL, stat_options, "A", 1);
1854                 parse_options_usage(NULL, stat_options, "a", 1);
1855                 goto out;
1856         }
1857
1858         if (add_default_attributes())
1859                 goto out;
1860
1861         target__validate(&target);
1862
1863         if ((stat_config.aggr_mode == AGGR_THREAD) && (target.system_wide))
1864                 target.per_thread = true;
1865
1866         if (perf_evlist__create_maps(evsel_list, &target) < 0) {
1867                 if (target__has_task(&target)) {
1868                         pr_err("Problems finding threads of monitor\n");
1869                         parse_options_usage(stat_usage, stat_options, "p", 1);
1870                         parse_options_usage(NULL, stat_options, "t", 1);
1871                 } else if (target__has_cpu(&target)) {
1872                         perror("failed to parse CPUs map");
1873                         parse_options_usage(stat_usage, stat_options, "C", 1);
1874                         parse_options_usage(NULL, stat_options, "a", 1);
1875                 }
1876                 goto out;
1877         }
1878
1879         /*
1880          * Initialize thread_map with comm names,
1881          * so we could print it out on output.
1882          */
1883         if (stat_config.aggr_mode == AGGR_THREAD) {
1884                 thread_map__read_comms(evsel_list->core.threads);
1885                 if (target.system_wide) {
1886                         if (runtime_stat_new(&stat_config,
1887                                 perf_thread_map__nr(evsel_list->core.threads))) {
1888                                 goto out;
1889                         }
1890                 }
1891         }
1892
1893         if (stat_config.times && interval)
1894                 interval_count = true;
1895         else if (stat_config.times && !interval) {
1896                 pr_err("interval-count option should be used together with "
1897                                 "interval-print.\n");
1898                 parse_options_usage(stat_usage, stat_options, "interval-count", 0);
1899                 parse_options_usage(stat_usage, stat_options, "I", 1);
1900                 goto out;
1901         }
1902
1903         if (timeout && timeout < 100) {
1904                 if (timeout < 10) {
1905                         pr_err("timeout must be >= 10ms.\n");
1906                         parse_options_usage(stat_usage, stat_options, "timeout", 0);
1907                         goto out;
1908                 } else
1909                         pr_warning("timeout < 100ms. "
1910                                    "The overhead percentage could be high in some cases. "
1911                                    "Please proceed with caution.\n");
1912         }
1913         if (timeout && interval) {
1914                 pr_err("timeout option is not supported with interval-print.\n");
1915                 parse_options_usage(stat_usage, stat_options, "timeout", 0);
1916                 parse_options_usage(stat_usage, stat_options, "I", 1);
1917                 goto out;
1918         }
1919
1920         if (perf_evlist__alloc_stats(evsel_list, interval))
1921                 goto out;
1922
1923         if (perf_stat_init_aggr_mode())
1924                 goto out;
1925
1926         /*
1927          * Set sample_type to PERF_SAMPLE_IDENTIFIER, which should be harmless
1928          * while avoiding that older tools show confusing messages.
1929          *
1930          * However for pipe sessions we need to keep it zero,
1931          * because script's perf_evsel__check_attr is triggered
1932          * by attr->sample_type != 0, and we can't run it on
1933          * stat sessions.
1934          */
1935         stat_config.identifier = !(STAT_RECORD && perf_stat.data.is_pipe);
1936
1937         /*
1938          * We dont want to block the signals - that would cause
1939          * child tasks to inherit that and Ctrl-C would not work.
1940          * What we want is for Ctrl-C to work in the exec()-ed
1941          * task, but being ignored by perf stat itself:
1942          */
1943         atexit(sig_atexit);
1944         if (!forever)
1945                 signal(SIGINT,  skip_signal);
1946         signal(SIGCHLD, skip_signal);
1947         signal(SIGALRM, skip_signal);
1948         signal(SIGABRT, skip_signal);
1949
1950         status = 0;
1951         for (run_idx = 0; forever || run_idx < stat_config.run_count; run_idx++) {
1952                 if (stat_config.run_count != 1 && verbose > 0)
1953                         fprintf(output, "[ perf stat: executing run #%d ... ]\n",
1954                                 run_idx + 1);
1955
1956                 if (run_idx != 0)
1957                         perf_evlist__reset_prev_raw_counts(evsel_list);
1958
1959                 status = run_perf_stat(argc, argv, run_idx);
1960                 if (forever && status != -1 && !interval) {
1961                         print_counters(NULL, argc, argv);
1962                         perf_stat__reset_stats();
1963                 }
1964         }
1965
1966         if (!forever && status != -1 && !interval)
1967                 print_counters(NULL, argc, argv);
1968
1969         if (STAT_RECORD) {
1970                 /*
1971                  * We synthesize the kernel mmap record just so that older tools
1972                  * don't emit warnings about not being able to resolve symbols
1973                  * due to /proc/sys/kernel/kptr_restrict settings and instear provide
1974                  * a saner message about no samples being in the perf.data file.
1975                  *
1976                  * This also serves to suppress a warning about f_header.data.size == 0
1977                  * in header.c at the moment 'perf stat record' gets introduced, which
1978                  * is not really needed once we start adding the stat specific PERF_RECORD_
1979                  * records, but the need to suppress the kptr_restrict messages in older
1980                  * tools remain  -acme
1981                  */
1982                 int fd = perf_data__fd(&perf_stat.data);
1983                 int err = perf_event__synthesize_kernel_mmap((void *)&perf_stat,
1984                                                              process_synthesized_event,
1985                                                              &perf_stat.session->machines.host);
1986                 if (err) {
1987                         pr_warning("Couldn't synthesize the kernel mmap record, harmless, "
1988                                    "older tools may produce warnings about this file\n.");
1989                 }
1990
1991                 if (!interval) {
1992                         if (WRITE_STAT_ROUND_EVENT(walltime_nsecs_stats.max, FINAL))
1993                                 pr_err("failed to write stat round event\n");
1994                 }
1995
1996                 if (!perf_stat.data.is_pipe) {
1997                         perf_stat.session->header.data_size += perf_stat.bytes_written;
1998                         perf_session__write_header(perf_stat.session, evsel_list, fd, true);
1999                 }
2000
2001                 evlist__close(evsel_list);
2002                 perf_session__delete(perf_stat.session);
2003         }
2004
2005         perf_stat__exit_aggr_mode();
2006         perf_evlist__free_stats(evsel_list);
2007 out:
2008         zfree(&stat_config.walltime_run);
2009
2010         if (smi_cost && smi_reset)
2011                 sysfs__write_int(FREEZE_ON_SMI_PATH, 0);
2012
2013         evlist__delete(evsel_list);
2014
2015         runtime_stat_delete(&stat_config);
2016
2017         return status;
2018 }