tools/perf/builtin-stat.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * builtin-stat.c
   4  *
   5  * Builtin stat command: Give a precise performance counters summary
   6  * overview about any workload, CPU or specific PID.
   7  *
   8  * Sample output:
   9
  10    $ perf stat ./hackbench 10
  11
  12   Time: 0.118
  13
  14   Performance counter stats for './hackbench 10':
  15
  16        1708.761321 task-clock                #   11.037 CPUs utilized
  17             41,190 context-switches          #    0.024 M/sec
  18              6,735 CPU-migrations            #    0.004 M/sec
  19             17,318 page-faults               #    0.010 M/sec
  20      5,205,202,243 cycles                    #    3.046 GHz
  21      3,856,436,920 stalled-cycles-frontend   #   74.09% frontend cycles idle
  22      1,600,790,871 stalled-cycles-backend    #   30.75% backend  cycles idle
  23      2,603,501,247 instructions              #    0.50  insns per cycle
  24                                              #    1.48  stalled cycles per insn
  25        484,357,498 branches                  #  283.455 M/sec
  26          6,388,934 branch-misses             #    1.32% of all branches
  27
  28         0.154822978  seconds time elapsed
  29
  30  *
  31  * Copyright (C) 2008-2011, Red Hat Inc, Ingo Molnar <mingo@redhat.com>
  32  *
  33  * Improvements and fixes by:
  34  *
  35  *   Arjan van de Ven <arjan@linux.intel.com>
  36  *   Yanmin Zhang <yanmin.zhang@intel.com>
  37  *   Wu Fengguang <fengguang.wu@intel.com>
  38  *   Mike Galbraith <efault@gmx.de>
  39  *   Paul Mackerras <paulus@samba.org>
  40  *   Jaswinder Singh Rajput <jaswinder@kernel.org>
  41  */
  42
  43 #include "perf.h"
  44 #include "builtin.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.h"
  58 #include "util/thread_map.h"
  59 #include "util/counts.h"
  60 #include "util/group.h"
  61 #include "util/session.h"
  62 #include "util/tool.h"
  63 #include "util/string2.h"
  64 #include "util/metricgroup.h"
  65 #include "util/top.h"
  66 #include "asm/bug.h"
  67
  68 #include <linux/time64.h>
  69 #include <linux/zalloc.h>
  70 #include <api/fs/fs.h>
  71 #include <errno.h>
  72 #include <signal.h>
  73 #include <stdlib.h>
  74 #include <sys/prctl.h>
  75 #include <inttypes.h>
  76 #include <locale.h>
  77 #include <math.h>
  78 #include <sys/types.h>
  79 #include <sys/stat.h>
  80 #include <sys/wait.h>
  81 #include <unistd.h>
  82 #include <sys/time.h>
  83 #include <sys/resource.h>
  84
  85 #include <linux/ctype.h>
  86
  87 #define DEFAULT_SEPARATOR       " "
  88 #define FREEZE_ON_SMI_PATH      "devices/cpu/freeze_on_smi"
  89
  90 static void print_counters(struct timespec *ts, int argc, const char **argv);
  91
  92 /* Default events used for perf stat -T */
  93 static const char *transaction_attrs = {
  94         "task-clock,"
  95         "{"
  96         "instructions,"
  97         "cycles,"
  98         "cpu/cycles-t/,"
  99         "cpu/tx-start/,"
 100         "cpu/el-start/,"
 101         "cpu/cycles-ct/"
 102         "}"
 103 };
 104
 105 /* More limited version when the CPU does not have all events. */
 106 static const char * transaction_limited_attrs = {
 107         "task-clock,"
 108         "{"
 109         "instructions,"
 110         "cycles,"
 111         "cpu/cycles-t/,"
 112         "cpu/tx-start/"
 113         "}"
 114 };
 115
 116 static const char * topdown_attrs[] = {
 117         "topdown-total-slots",
 118         "topdown-slots-retired",
 119         "topdown-recovery-bubbles",
 120         "topdown-fetch-bubbles",
 121         "topdown-slots-issued",
 122         NULL,
 123 };
 124
 125 static const char *smi_cost_attrs = {
 126         "{"
 127         "msr/aperf/,"
 128         "msr/smi/,"
 129         "cycles"
 130         "}"
 131 };
 132
 133 static struct perf_evlist       *evsel_list;
 134
 135 static struct target target = {
 136         .uid    = UINT_MAX,
 137 };
 138
 139 #define METRIC_ONLY_LEN 20
 140
 141 static volatile pid_t           child_pid                       = -1;
 142 static int                      detailed_run                    =  0;
 143 static bool                     transaction_run;
 144 static bool                     topdown_run                     = false;
 145 static bool                     smi_cost                        = false;
 146 static bool                     smi_reset                       = false;
 147 static int                      big_num_opt                     =  -1;
 148 static bool                     group                           = false;
 149 static const char               *pre_cmd                        = NULL;
 150 static const char               *post_cmd                       = NULL;
 151 static bool                     sync_run                        = false;
 152 static bool                     forever                         = false;
 153 static bool                     force_metric_only               = false;
 154 static struct timespec          ref_time;
 155 static bool                     append_file;
 156 static bool                     interval_count;
 157 static const char               *output_name;
 158 static int                      output_fd;
 159
 160 struct perf_stat {
 161         bool                     record;
 162         struct perf_data         data;
 163         struct perf_session     *session;
 164         u64                      bytes_written;
 165         struct perf_tool         tool;
 166         bool                     maps_allocated;
 167         struct cpu_map          *cpus;
 168         struct thread_map       *threads;
 169         enum aggr_mode           aggr_mode;
 170 };
 171
 172 static struct perf_stat         perf_stat;
 173 #define STAT_RECORD             perf_stat.record
 174
 175 static volatile int done = 0;
 176
 177 static struct perf_stat_config stat_config = {
 178         .aggr_mode              = AGGR_GLOBAL,
 179         .scale                  = true,
 180         .unit_width             = 4, /* strlen("unit") */
 181         .run_count              = 1,
 182         .metric_only_len        = METRIC_ONLY_LEN,
 183         .walltime_nsecs_stats   = &walltime_nsecs_stats,
 184         .big_num                = true,
 185 };
 186
 187 static inline void diff_timespec(struct timespec *r, struct timespec *a,
 188                                  struct timespec *b)
 189 {
 190         r->tv_sec = a->tv_sec - b->tv_sec;
 191         if (a->tv_nsec < b->tv_nsec) {
 192                 r->tv_nsec = a->tv_nsec + NSEC_PER_SEC - b->tv_nsec;
 193                 r->tv_sec--;
 194         } else {
 195                 r->tv_nsec = a->tv_nsec - b->tv_nsec ;
 196         }
 197 }
 198
 199 static void perf_stat__reset_stats(void)
 200 {
 201         int i;
 202
 203         perf_evlist__reset_stats(evsel_list);
 204         perf_stat__reset_shadow_stats();
 205
 206         for (i = 0; i < stat_config.stats_num; i++)
 207                 perf_stat__reset_shadow_per_stat(&stat_config.stats[i]);
 208 }
 209
 210 static int process_synthesized_event(struct perf_tool *tool __maybe_unused,
 211                                      union perf_event *event,
 212                                      struct perf_sample *sample __maybe_unused,
 213                                      struct machine *machine __maybe_unused)
 214 {
 215         if (perf_data__write(&perf_stat.data, event, event->header.size) < 0) {
 216                 pr_err("failed to write perf data, error: %m\n");
 217                 return -1;
 218         }
 219
 220         perf_stat.bytes_written += event->header.size;
 221         return 0;
 222 }
 223
 224 static int write_stat_round_event(u64 tm, u64 type)
 225 {
 226         return perf_event__synthesize_stat_round(NULL, tm, type,
 227                                                  process_synthesized_event,
 228                                                  NULL);
 229 }
 230
 231 #define WRITE_STAT_ROUND_EVENT(time, interval) \
 232         write_stat_round_event(time, PERF_STAT_ROUND_TYPE__ ## interval)
 233
 234 #define SID(e, x, y) xyarray__entry(e->sample_id, x, y)
 235
 236 static int
 237 perf_evsel__write_stat_event(struct perf_evsel *counter, u32 cpu, u32 thread,
 238                              struct perf_counts_values *count)
 239 {
 240         struct perf_sample_id *sid = SID(counter, cpu, thread);
 241
 242         return perf_event__synthesize_stat(NULL, cpu, thread, sid->id, count,
 243                                            process_synthesized_event, NULL);
 244 }
 245
 246 static int read_single_counter(struct perf_evsel *counter, int cpu,
 247                                int thread, struct timespec *rs)
 248 {
 249         if (counter->tool_event == PERF_TOOL_DURATION_TIME) {
 250                 u64 val = rs->tv_nsec + rs->tv_sec*1000000000ULL;
 251                 struct perf_counts_values *count =
 252                         perf_counts(counter->counts, cpu, thread);
 253                 count->ena = count->run = val;
 254                 count->val = val;
 255                 return 0;
 256         }
 257         return perf_evsel__read_counter(counter, cpu, thread);
 258 }
 259
 260 /*
 261  * Read out the results of a single counter:
 262  * do not aggregate counts across CPUs in system-wide mode
 263  */
 264 static int read_counter(struct perf_evsel *counter, struct timespec *rs)
 265 {
 266         int nthreads = thread_map__nr(evsel_list->threads);
 267         int ncpus, cpu, thread;
 268
 269         if (target__has_cpu(&target) && !target__has_per_thread(&target))
 270                 ncpus = perf_evsel__nr_cpus(counter);
 271         else
 272                 ncpus = 1;
 273
 274         if (!counter->supported)
 275                 return -ENOENT;
 276
 277         if (counter->system_wide)
 278                 nthreads = 1;
 279
 280         for (thread = 0; thread < nthreads; thread++) {
 281                 for (cpu = 0; cpu < ncpus; cpu++) {
 282                         struct perf_counts_values *count;
 283
 284                         count = perf_counts(counter->counts, cpu, thread);
 285
 286                         /*
 287                          * The leader's group read loads data into its group members
 288                          * (via perf_evsel__read_counter) and sets threir count->loaded.
 289                          */
 290                         if (!count->loaded &&
 291                             read_single_counter(counter, cpu, thread, rs)) {
 292                                 counter->counts->scaled = -1;
 293                                 perf_counts(counter->counts, cpu, thread)->ena = 0;
 294                                 perf_counts(counter->counts, cpu, thread)->run = 0;
 295                                 return -1;
 296                         }
 297
 298                         count->loaded = false;
 299
 300                         if (STAT_RECORD) {
 301                                 if (perf_evsel__write_stat_event(counter, cpu, thread, count)) {
 302                                         pr_err("failed to write stat event\n");
 303                                         return -1;
 304                                 }
 305                         }
 306
 307                         if (verbose > 1) {
 308                                 fprintf(stat_config.output,
 309                                         "%s: %d: %" PRIu64 " %" PRIu64 " %" PRIu64 "\n",
 310                                                 perf_evsel__name(counter),
 311                                                 cpu,
 312                                                 count->val, count->ena, count->run);
 313                         }
 314                 }
 315         }
 316
 317         return 0;
 318 }
 319
 320 static void read_counters(struct timespec *rs)
 321 {
 322         struct perf_evsel *counter;
 323         int ret;
 324
 325         evlist__for_each_entry(evsel_list, counter) {
 326                 ret = read_counter(counter, rs);
 327                 if (ret)
 328                         pr_debug("failed to read counter %s\n", counter->name);
 329
 330                 if (ret == 0 && perf_stat_process_counter(&stat_config, counter))
 331                         pr_warning("failed to process counter %s\n", counter->name);
 332         }
 333 }
 334
 335 static void process_interval(void)
 336 {
 337         struct timespec ts, rs;
 338
 339         clock_gettime(CLOCK_MONOTONIC, &ts);
 340         diff_timespec(&rs, &ts, &ref_time);
 341
 342         read_counters(&rs);
 343
 344         if (STAT_RECORD) {
 345                 if (WRITE_STAT_ROUND_EVENT(rs.tv_sec * NSEC_PER_SEC + rs.tv_nsec, INTERVAL))
 346                         pr_err("failed to write stat round event\n");
 347         }
 348
 349         init_stats(&walltime_nsecs_stats);
 350         update_stats(&walltime_nsecs_stats, stat_config.interval * 1000000);
 351         print_counters(&rs, 0, NULL);
 352 }
 353
 354 static void enable_counters(void)
 355 {
 356         if (stat_config.initial_delay)
 357                 usleep(stat_config.initial_delay * USEC_PER_MSEC);
 358
 359         /*
 360          * We need to enable counters only if:
 361          * - we don't have tracee (attaching to task or cpu)
 362          * - we have initial delay configured
 363          */
 364         if (!target__none(&target) || stat_config.initial_delay)
 365                 perf_evlist__enable(evsel_list);
 366 }
 367
 368 static void disable_counters(void)
 369 {
 370         /*
 371          * If we don't have tracee (attaching to task or cpu), counters may
 372          * still be running. To get accurate group ratios, we must stop groups
 373          * from counting before reading their constituent counters.
 374          */
 375         if (!target__none(&target))
 376                 perf_evlist__disable(evsel_list);
 377 }
 378
 379 static volatile int workload_exec_errno;
 380
 381 /*
 382  * perf_evlist__prepare_workload will send a SIGUSR1
 383  * if the fork fails, since we asked by setting its
 384  * want_signal to true.
 385  */
 386 static void workload_exec_failed_signal(int signo __maybe_unused, siginfo_t *info,
 387                                         void *ucontext __maybe_unused)
 388 {
 389         workload_exec_errno = info->si_value.sival_int;
 390 }
 391
 392 static bool perf_evsel__should_store_id(struct perf_evsel *counter)
 393 {
 394         return STAT_RECORD || counter->attr.read_format & PERF_FORMAT_ID;
 395 }
 396
 397 static bool is_target_alive(struct target *_target,
 398                             struct thread_map *threads)
 399 {
 400         struct stat st;
 401         int i;
 402
 403         if (!target__has_task(_target))
 404                 return true;
 405
 406         for (i = 0; i < threads->nr; i++) {
 407                 char path[PATH_MAX];
 408
 409                 scnprintf(path, PATH_MAX, "%s/%d", procfs__mountpoint(),
 410                           threads->map[i].pid);
 411
 412                 if (!stat(path, &st))
 413                         return true;
 414         }
 415
 416         return false;
 417 }
 418
 419 static int __run_perf_stat(int argc, const char **argv, int run_idx)
 420 {
 421         int interval = stat_config.interval;
 422         int times = stat_config.times;
 423         int timeout = stat_config.timeout;
 424         char msg[BUFSIZ];
 425         unsigned long long t0, t1;
 426         struct perf_evsel *counter;
 427         struct timespec ts;
 428         size_t l;
 429         int status = 0;
 430         const bool forks = (argc > 0);
 431         bool is_pipe = STAT_RECORD ? perf_stat.data.is_pipe : false;
 432
 433         if (interval) {
 434                 ts.tv_sec  = interval / USEC_PER_MSEC;
 435                 ts.tv_nsec = (interval % USEC_PER_MSEC) * NSEC_PER_MSEC;
 436         } else if (timeout) {
 437                 ts.tv_sec  = timeout / USEC_PER_MSEC;
 438                 ts.tv_nsec = (timeout % USEC_PER_MSEC) * NSEC_PER_MSEC;
 439         } else {
 440                 ts.tv_sec  = 1;
 441                 ts.tv_nsec = 0;
 442         }
 443
 444         if (forks) {
 445                 if (perf_evlist__prepare_workload(evsel_list, &target, argv, is_pipe,
 446                                                   workload_exec_failed_signal) < 0) {
 447                         perror("failed to prepare workload");
 448                         return -1;
 449                 }
 450                 child_pid = evsel_list->workload.pid;
 451         }
 452
 453         if (group)
 454                 perf_evlist__set_leader(evsel_list);
 455
 456         evlist__for_each_entry(evsel_list, counter) {
 457 try_again:
 458                 if (create_perf_stat_counter(counter, &stat_config, &target) < 0) {
 459
 460                         /* Weak group failed. Reset the group. */
 461                         if ((errno == EINVAL || errno == EBADF) &&
 462                             counter->leader != counter &&
 463                             counter->weak_group) {
 464                                 counter = perf_evlist__reset_weak_group(evsel_list, counter);
 465                                 goto try_again;
 466                         }
 467
 468                         /*
 469                          * PPC returns ENXIO for HW counters until 2.6.37
 470                          * (behavior changed with commit b0a873e).
 471                          */
 472                         if (errno == EINVAL || errno == ENOSYS ||
 473                             errno == ENOENT || errno == EOPNOTSUPP ||
 474                             errno == ENXIO) {
 475                                 if (verbose > 0)
 476                                         ui__warning("%s event is not supported by the kernel.\n",
 477                                                     perf_evsel__name(counter));
 478                                 counter->supported = false;
 479
 480                                 if ((counter->leader != counter) ||
 481                                     !(counter->leader->nr_members > 1))
 482                                         continue;
 483                         } else if (perf_evsel__fallback(counter, errno, msg, sizeof(msg))) {
 484                                 if (verbose > 0)
 485                                         ui__warning("%s\n", msg);
 486                                 goto try_again;
 487                         } else if (target__has_per_thread(&target) &&
 488                                    evsel_list->threads &&
 489                                    evsel_list->threads->err_thread != -1) {
 490                                 /*
 491                                  * For global --per-thread case, skip current
 492                                  * error thread.
 493                                  */
 494                                 if (!thread_map__remove(evsel_list->threads,
 495                                                         evsel_list->threads->err_thread)) {
 496                                         evsel_list->threads->err_thread = -1;
 497                                         goto try_again;
 498                                 }
 499                         }
 500
 501                         perf_evsel__open_strerror(counter, &target,
 502                                                   errno, msg, sizeof(msg));
 503                         ui__error("%s\n", msg);
 504
 505                         if (child_pid != -1)
 506                                 kill(child_pid, SIGTERM);
 507
 508                         return -1;
 509                 }
 510                 counter->supported = true;
 511
 512                 l = strlen(counter->unit);
 513                 if (l > stat_config.unit_width)
 514                         stat_config.unit_width = l;
 515
 516                 if (perf_evsel__should_store_id(counter) &&
 517                     perf_evsel__store_ids(counter, evsel_list))
 518                         return -1;
 519         }
 520
 521         if (perf_evlist__apply_filters(evsel_list, &counter)) {
 522                 pr_err("failed to set filter \"%s\" on event %s with %d (%s)\n",
 523                         counter->filter, perf_evsel__name(counter), errno,
 524                         str_error_r(errno, msg, sizeof(msg)));
 525                 return -1;
 526         }
 527
 528         if (STAT_RECORD) {
 529                 int err, fd = perf_data__fd(&perf_stat.data);
 530
 531                 if (is_pipe) {
 532                         err = perf_header__write_pipe(perf_data__fd(&perf_stat.data));
 533                 } else {
 534                         err = perf_session__write_header(perf_stat.session, evsel_list,
 535                                                          fd, false);
 536                 }
 537
 538                 if (err < 0)
 539                         return err;
 540
 541                 err = perf_stat_synthesize_config(&stat_config, NULL, evsel_list,
 542                                                   process_synthesized_event, is_pipe);
 543                 if (err < 0)
 544                         return err;
 545         }
 546
 547         /*
 548          * Enable counters and exec the command:
 549          */
 550         t0 = rdclock();
 551         clock_gettime(CLOCK_MONOTONIC, &ref_time);
 552
 553         if (forks) {
 554                 perf_evlist__start_workload(evsel_list);
 555                 enable_counters();
 556
 557                 if (interval || timeout) {
 558                         while (!waitpid(child_pid, &status, WNOHANG)) {
 559                                 nanosleep(&ts, NULL);
 560                                 if (timeout)
 561                                         break;
 562                                 process_interval();
 563                                 if (interval_count && !(--times))
 564                                         break;
 565                         }
 566                 }
 567                 if (child_pid != -1)
 568                         wait4(child_pid, &status, 0, &stat_config.ru_data);
 569
 570                 if (workload_exec_errno) {
 571                         const char *emsg = str_error_r(workload_exec_errno, msg, sizeof(msg));
 572                         pr_err("Workload failed: %s\n", emsg);
 573                         return -1;
 574                 }
 575
 576                 if (WIFSIGNALED(status))
 577                         psignal(WTERMSIG(status), argv[0]);
 578         } else {
 579                 enable_counters();
 580                 while (!done) {
 581                         nanosleep(&ts, NULL);
 582                         if (!is_target_alive(&target, evsel_list->threads))
 583                                 break;
 584                         if (timeout)
 585                                 break;
 586                         if (interval) {
 587                                 process_interval();
 588                                 if (interval_count && !(--times))
 589                                         break;
 590                         }
 591                 }
 592         }
 593
 594         disable_counters();
 595
 596         t1 = rdclock();
 597
 598         if (stat_config.walltime_run_table)
 599                 stat_config.walltime_run[run_idx] = t1 - t0;
 600
 601         update_stats(&walltime_nsecs_stats, t1 - t0);
 602
 603         /*
 604          * Closing a group leader splits the group, and as we only disable
 605          * group leaders, results in remaining events becoming enabled. To
 606          * avoid arbitrary skew, we must read all counters before closing any
 607          * group leaders.
 608          */
 609         read_counters(&(struct timespec) { .tv_nsec = t1-t0 });
 610
 611         /*
 612          * We need to keep evsel_list alive, because it's processed
 613          * later the evsel_list will be closed after.
 614          */
 615         if (!STAT_RECORD)
 616                 perf_evlist__close(evsel_list);
 617
 618         return WEXITSTATUS(status);
 619 }
 620
 621 static int run_perf_stat(int argc, const char **argv, int run_idx)
 622 {
 623         int ret;
 624
 625         if (pre_cmd) {
 626                 ret = system(pre_cmd);
 627                 if (ret)
 628                         return ret;
 629         }
 630
 631         if (sync_run)
 632                 sync();
 633
 634         ret = __run_perf_stat(argc, argv, run_idx);
 635         if (ret)
 636                 return ret;
 637
 638         if (post_cmd) {
 639                 ret = system(post_cmd);
 640                 if (ret)
 641                         return ret;
 642         }
 643
 644         return ret;
 645 }
 646
 647 static void print_counters(struct timespec *ts, int argc, const char **argv)
 648 {
 649         /* Do not print anything if we record to the pipe. */
 650         if (STAT_RECORD && perf_stat.data.is_pipe)
 651                 return;
 652
 653         perf_evlist__print_counters(evsel_list, &stat_config, &target,
 654                                     ts, argc, argv);
 655 }
 656
 657 static volatile int signr = -1;
 658
 659 static void skip_signal(int signo)
 660 {
 661         if ((child_pid == -1) || stat_config.interval)
 662                 done = 1;
 663
 664         signr = signo;
 665         /*
 666          * render child_pid harmless
 667          * won't send SIGTERM to a random
 668          * process in case of race condition
 669          * and fast PID recycling
 670          */
 671         child_pid = -1;
 672 }
 673
 674 static void sig_atexit(void)
 675 {
 676         sigset_t set, oset;
 677
 678         /*
 679          * avoid race condition with SIGCHLD handler
 680          * in skip_signal() which is modifying child_pid
 681          * goal is to avoid send SIGTERM to a random
 682          * process
 683          */
 684         sigemptyset(&set);
 685         sigaddset(&set, SIGCHLD);
 686         sigprocmask(SIG_BLOCK, &set, &oset);
 687
 688         if (child_pid != -1)
 689                 kill(child_pid, SIGTERM);
 690
 691         sigprocmask(SIG_SETMASK, &oset, NULL);
 692
 693         if (signr == -1)
 694                 return;
 695
 696         signal(signr, SIG_DFL);
 697         kill(getpid(), signr);
 698 }
 699
 700 static int stat__set_big_num(const struct option *opt __maybe_unused,
 701                              const char *s __maybe_unused, int unset)
 702 {
 703         big_num_opt = unset ? 0 : 1;
 704         return 0;
 705 }
 706
 707 static int enable_metric_only(const struct option *opt __maybe_unused,
 708                               const char *s __maybe_unused, int unset)
 709 {
 710         force_metric_only = true;
 711         stat_config.metric_only = !unset;
 712         return 0;
 713 }
 714
 715 static int parse_metric_groups(const struct option *opt,
 716                                const char *str,
 717                                int unset __maybe_unused)
 718 {
 719         return metricgroup__parse_groups(opt, str, &stat_config.metric_events);
 720 }
 721
 722 static struct option stat_options[] = {
 723         OPT_BOOLEAN('T', "transaction", &transaction_run,
 724                     "hardware transaction statistics"),
 725         OPT_CALLBACK('e', "event", &evsel_list, "event",
 726                      "event selector. use 'perf list' to list available events",
 727                      parse_events_option),
 728         OPT_CALLBACK(0, "filter", &evsel_list, "filter",
 729                      "event filter", parse_filter),
 730         OPT_BOOLEAN('i', "no-inherit", &stat_config.no_inherit,
 731                     "child tasks do not inherit counters"),
 732         OPT_STRING('p', "pid", &target.pid, "pid",
 733                    "stat events on existing process id"),
 734         OPT_STRING('t', "tid", &target.tid, "tid",
 735                    "stat events on existing thread id"),
 736         OPT_BOOLEAN('a', "all-cpus", &target.system_wide,
 737                     "system-wide collection from all CPUs"),
 738         OPT_BOOLEAN('g', "group", &group,
 739                     "put the counters into a counter group"),
 740         OPT_BOOLEAN(0, "scale", &stat_config.scale,
 741                     "Use --no-scale to disable counter scaling for multiplexing"),
 742         OPT_INCR('v', "verbose", &verbose,
 743                     "be more verbose (show counter open errors, etc)"),
 744         OPT_INTEGER('r', "repeat", &stat_config.run_count,
 745                     "repeat command and print average + stddev (max: 100, forever: 0)"),
 746         OPT_BOOLEAN(0, "table", &stat_config.walltime_run_table,
 747                     "display details about each run (only with -r option)"),
 748         OPT_BOOLEAN('n', "null", &stat_config.null_run,
 749                     "null run - dont start any counters"),
 750         OPT_INCR('d', "detailed", &detailed_run,
 751                     "detailed run - start a lot of events"),
 752         OPT_BOOLEAN('S', "sync", &sync_run,
 753                     "call sync() before starting a run"),
 754         OPT_CALLBACK_NOOPT('B', "big-num", NULL, NULL,
 755                            "print large numbers with thousands\' separators",
 756                            stat__set_big_num),
 757         OPT_STRING('C', "cpu", &target.cpu_list, "cpu",
 758                     "list of cpus to monitor in system-wide"),
 759         OPT_SET_UINT('A', "no-aggr", &stat_config.aggr_mode,
 760                     "disable CPU count aggregation", AGGR_NONE),
 761         OPT_BOOLEAN(0, "no-merge", &stat_config.no_merge, "Do not merge identical named events"),
 762         OPT_STRING('x', "field-separator", &stat_config.csv_sep, "separator",
 763                    "print counts with custom separator"),
 764         OPT_CALLBACK('G', "cgroup", &evsel_list, "name",
 765                      "monitor event in cgroup name only", parse_cgroups),
 766         OPT_STRING('o', "output", &output_name, "file", "output file name"),
 767         OPT_BOOLEAN(0, "append", &append_file, "append to the output file"),
 768         OPT_INTEGER(0, "log-fd", &output_fd,
 769                     "log output to fd, instead of stderr"),
 770         OPT_STRING(0, "pre", &pre_cmd, "command",
 771                         "command to run prior to the measured command"),
 772         OPT_STRING(0, "post", &post_cmd, "command",
 773                         "command to run after to the measured command"),
 774         OPT_UINTEGER('I', "interval-print", &stat_config.interval,
 775                     "print counts at regular interval in ms "
 776                     "(overhead is possible for values <= 100ms)"),
 777         OPT_INTEGER(0, "interval-count", &stat_config.times,
 778                     "print counts for fixed number of times"),
 779         OPT_BOOLEAN(0, "interval-clear", &stat_config.interval_clear,
 780                     "clear screen in between new interval"),
 781         OPT_UINTEGER(0, "timeout", &stat_config.timeout,
 782                     "stop workload and print counts after a timeout period in ms (>= 10ms)"),
 783         OPT_SET_UINT(0, "per-socket", &stat_config.aggr_mode,
 784                      "aggregate counts per processor socket", AGGR_SOCKET),
 785         OPT_SET_UINT(0, "per-die", &stat_config.aggr_mode,
 786                      "aggregate counts per processor die", AGGR_DIE),
 787         OPT_SET_UINT(0, "per-core", &stat_config.aggr_mode,
 788                      "aggregate counts per physical processor core", AGGR_CORE),
 789         OPT_SET_UINT(0, "per-thread", &stat_config.aggr_mode,
 790                      "aggregate counts per thread", AGGR_THREAD),
 791         OPT_UINTEGER('D', "delay", &stat_config.initial_delay,
 792                      "ms to wait before starting measurement after program start"),
 793         OPT_CALLBACK_NOOPT(0, "metric-only", &stat_config.metric_only, NULL,
 794                         "Only print computed metrics. No raw values", enable_metric_only),
 795         OPT_BOOLEAN(0, "topdown", &topdown_run,
 796                         "measure topdown level 1 statistics"),
 797         OPT_BOOLEAN(0, "smi-cost", &smi_cost,
 798                         "measure SMI cost"),
 799         OPT_CALLBACK('M', "metrics", &evsel_list, "metric/metric group list",
 800                      "monitor specified metrics or metric groups (separated by ,)",
 801                      parse_metric_groups),
 802         OPT_END()
 803 };
 804
 805 static int perf_stat__get_socket(struct perf_stat_config *config __maybe_unused,
 806                                  struct cpu_map *map, int cpu)
 807 {
 808         return cpu_map__get_socket(map, cpu, NULL);
 809 }
 810
 811 static int perf_stat__get_die(struct perf_stat_config *config __maybe_unused,
 812                               struct cpu_map *map, int cpu)
 813 {
 814         return cpu_map__get_die(map, cpu, NULL);
 815 }
 816
 817 static int perf_stat__get_core(struct perf_stat_config *config __maybe_unused,
 818                                struct cpu_map *map, int cpu)
 819 {
 820         return cpu_map__get_core(map, cpu, NULL);
 821 }
 822
 823 static int cpu_map__get_max(struct cpu_map *map)
 824 {
 825         int i, max = -1;
 826
 827         for (i = 0; i < map->nr; i++) {
 828                 if (map->map[i] > max)
 829                         max = map->map[i];
 830         }
 831
 832         return max;
 833 }
 834
 835 static int perf_stat__get_aggr(struct perf_stat_config *config,
 836                                aggr_get_id_t get_id, struct cpu_map *map, int idx)
 837 {
 838         int cpu;
 839
 840         if (idx >= map->nr)
 841                 return -1;
 842
 843         cpu = map->map[idx];
 844
 845         if (config->cpus_aggr_map->map[cpu] == -1)
 846                 config->cpus_aggr_map->map[cpu] = get_id(config, map, idx);
 847
 848         return config->cpus_aggr_map->map[cpu];
 849 }
 850
 851 static int perf_stat__get_socket_cached(struct perf_stat_config *config,
 852                                         struct cpu_map *map, int idx)
 853 {
 854         return perf_stat__get_aggr(config, perf_stat__get_socket, map, idx);
 855 }
 856
 857 static int perf_stat__get_die_cached(struct perf_stat_config *config,
 858                                         struct cpu_map *map, int idx)
 859 {
 860         return perf_stat__get_aggr(config, perf_stat__get_die, map, idx);
 861 }
 862
 863 static int perf_stat__get_core_cached(struct perf_stat_config *config,
 864                                       struct cpu_map *map, int idx)
 865 {
 866         return perf_stat__get_aggr(config, perf_stat__get_core, map, idx);
 867 }
 868
 869 static bool term_percore_set(void)
 870 {
 871         struct perf_evsel *counter;
 872
 873         evlist__for_each_entry(evsel_list, counter) {
 874                 if (counter->percore)
 875                         return true;
 876         }
 877
 878         return false;
 879 }
 880
 881 static int perf_stat_init_aggr_mode(void)
 882 {
 883         int nr;
 884
 885         switch (stat_config.aggr_mode) {
 886         case AGGR_SOCKET:
 887                 if (cpu_map__build_socket_map(evsel_list->cpus, &stat_config.aggr_map)) {
 888                         perror("cannot build socket map");
 889                         return -1;
 890                 }
 891                 stat_config.aggr_get_id = perf_stat__get_socket_cached;
 892                 break;
 893         case AGGR_DIE:
 894                 if (cpu_map__build_die_map(evsel_list->cpus, &stat_config.aggr_map)) {
 895                         perror("cannot build die map");
 896                         return -1;
 897                 }
 898                 stat_config.aggr_get_id = perf_stat__get_die_cached;
 899                 break;
 900         case AGGR_CORE:
 901                 if (cpu_map__build_core_map(evsel_list->cpus, &stat_config.aggr_map)) {
 902                         perror("cannot build core map");
 903                         return -1;
 904                 }
 905                 stat_config.aggr_get_id = perf_stat__get_core_cached;
 906                 break;
 907         case AGGR_NONE:
 908                 if (term_percore_set()) {
 909                         if (cpu_map__build_core_map(evsel_list->cpus,
 910                                                     &stat_config.aggr_map)) {
 911                                 perror("cannot build core map");
 912                                 return -1;
 913                         }
 914                         stat_config.aggr_get_id = perf_stat__get_core_cached;
 915                 }
 916                 break;
 917         case AGGR_GLOBAL:
 918         case AGGR_THREAD:
 919         case AGGR_UNSET:
 920         default:
 921                 break;
 922         }
 923
 924         /*
 925          * The evsel_list->cpus is the base we operate on,
 926          * taking the highest cpu number to be the size of
 927          * the aggregation translate cpumap.
 928          */
 929         nr = cpu_map__get_max(evsel_list->cpus);
 930         stat_config.cpus_aggr_map = cpu_map__empty_new(nr + 1);
 931         return stat_config.cpus_aggr_map ? 0 : -ENOMEM;
 932 }
 933
 934 static void perf_stat__exit_aggr_mode(void)
 935 {
 936         cpu_map__put(stat_config.aggr_map);
 937         cpu_map__put(stat_config.cpus_aggr_map);
 938         stat_config.aggr_map = NULL;
 939         stat_config.cpus_aggr_map = NULL;
 940 }
 941
 942 static inline int perf_env__get_cpu(struct perf_env *env, struct cpu_map *map, int idx)
 943 {
 944         int cpu;
 945
 946         if (idx > map->nr)
 947                 return -1;
 948
 949         cpu = map->map[idx];
 950
 951         if (cpu >= env->nr_cpus_avail)
 952                 return -1;
 953
 954         return cpu;
 955 }
 956
 957 static int perf_env__get_socket(struct cpu_map *map, int idx, void *data)
 958 {
 959         struct perf_env *env = data;
 960         int cpu = perf_env__get_cpu(env, map, idx);
 961
 962         return cpu == -1 ? -1 : env->cpu[cpu].socket_id;
 963 }
 964
 965 static int perf_env__get_die(struct cpu_map *map, int idx, void *data)
 966 {
 967         struct perf_env *env = data;
 968         int die_id = -1, cpu = perf_env__get_cpu(env, map, idx);
 969
 970         if (cpu != -1) {
 971                 /*
 972                  * Encode socket in bit range 15:8
 973                  * die_id is relative to socket,
 974                  * we need a global id. So we combine
 975                  * socket + die id
 976                  */
 977                 if (WARN_ONCE(env->cpu[cpu].socket_id >> 8, "The socket id number is too big.\n"))
 978                         return -1;
 979
 980                 if (WARN_ONCE(env->cpu[cpu].die_id >> 8, "The die id number is too big.\n"))
 981                         return -1;
 982
 983                 die_id = (env->cpu[cpu].socket_id << 8) | (env->cpu[cpu].die_id & 0xff);
 984         }
 985
 986         return die_id;
 987 }
 988
 989 static int perf_env__get_core(struct cpu_map *map, int idx, void *data)
 990 {
 991         struct perf_env *env = data;
 992         int core = -1, cpu = perf_env__get_cpu(env, map, idx);
 993
 994         if (cpu != -1) {
 995                 /*
 996                  * Encode socket in bit range 31:24
 997                  * encode die id in bit range 23:16
 998                  * core_id is relative to socket and die,
 999                  * we need a global id. So we combine
1000                  * socket + die id + core id
1001                  */
1002                 if (WARN_ONCE(env->cpu[cpu].socket_id >> 8, "The socket id number is too big.\n"))
1003                         return -1;
1004
1005                 if (WARN_ONCE(env->cpu[cpu].die_id >> 8, "The die id number is too big.\n"))
1006                         return -1;
1007
1008                 if (WARN_ONCE(env->cpu[cpu].core_id >> 16, "The core id number is too big.\n"))
1009                         return -1;
1010
1011                 core = (env->cpu[cpu].socket_id << 24) |
1012                        (env->cpu[cpu].die_id << 16) |
1013                        (env->cpu[cpu].core_id & 0xffff);
1014         }
1015
1016         return core;
1017 }
1018
1019 static int perf_env__build_socket_map(struct perf_env *env, struct cpu_map *cpus,
1020                                       struct cpu_map **sockp)
1021 {
1022         return cpu_map__build_map(cpus, sockp, perf_env__get_socket, env);
1023 }
1024
1025 static int perf_env__build_die_map(struct perf_env *env, struct cpu_map *cpus,
1026                                    struct cpu_map **diep)
1027 {
1028         return cpu_map__build_map(cpus, diep, perf_env__get_die, env);
1029 }
1030
1031 static int perf_env__build_core_map(struct perf_env *env, struct cpu_map *cpus,
1032                                     struct cpu_map **corep)
1033 {
1034         return cpu_map__build_map(cpus, corep, perf_env__get_core, env);
1035 }
1036
1037 static int perf_stat__get_socket_file(struct perf_stat_config *config __maybe_unused,
1038                                       struct cpu_map *map, int idx)
1039 {
1040         return perf_env__get_socket(map, idx, &perf_stat.session->header.env);
1041 }
1042 static int perf_stat__get_die_file(struct perf_stat_config *config __maybe_unused,
1043                                    struct cpu_map *map, int idx)
1044 {
1045         return perf_env__get_die(map, idx, &perf_stat.session->header.env);
1046 }
1047
1048 static int perf_stat__get_core_file(struct perf_stat_config *config __maybe_unused,
1049                                     struct cpu_map *map, int idx)
1050 {
1051         return perf_env__get_core(map, idx, &perf_stat.session->header.env);
1052 }
1053
1054 static int perf_stat_init_aggr_mode_file(struct perf_stat *st)
1055 {
1056         struct perf_env *env = &st->session->header.env;
1057
1058         switch (stat_config.aggr_mode) {
1059         case AGGR_SOCKET:
1060                 if (perf_env__build_socket_map(env, evsel_list->cpus, &stat_config.aggr_map)) {
1061                         perror("cannot build socket map");
1062                         return -1;
1063                 }
1064                 stat_config.aggr_get_id = perf_stat__get_socket_file;
1065                 break;
1066         case AGGR_DIE:
1067                 if (perf_env__build_die_map(env, evsel_list->cpus, &stat_config.aggr_map)) {
1068                         perror("cannot build die map");
1069                         return -1;
1070                 }
1071                 stat_config.aggr_get_id = perf_stat__get_die_file;
1072                 break;
1073         case AGGR_CORE:
1074                 if (perf_env__build_core_map(env, evsel_list->cpus, &stat_config.aggr_map)) {
1075                         perror("cannot build core map");
1076                         return -1;
1077                 }
1078                 stat_config.aggr_get_id = perf_stat__get_core_file;
1079                 break;
1080         case AGGR_NONE:
1081         case AGGR_GLOBAL:
1082         case AGGR_THREAD:
1083         case AGGR_UNSET:
1084         default:
1085                 break;
1086         }
1087
1088         return 0;
1089 }
1090
1091 static int topdown_filter_events(const char **attr, char **str, bool use_group)
1092 {
1093         int off = 0;
1094         int i;
1095         int len = 0;
1096         char *s;
1097
1098         for (i = 0; attr[i]; i++) {
1099                 if (pmu_have_event("cpu", attr[i])) {
1100                         len += strlen(attr[i]) + 1;
1101                         attr[i - off] = attr[i];
1102                 } else
1103                         off++;
1104         }
1105         attr[i - off] = NULL;
1106
1107         *str = malloc(len + 1 + 2);
1108         if (!*str)
1109                 return -1;
1110         s = *str;
1111         if (i - off == 0) {
1112                 *s = 0;
1113                 return 0;
1114         }
1115         if (use_group)
1116                 *s++ = '{';
1117         for (i = 0; attr[i]; i++) {
1118                 strcpy(s, attr[i]);
1119                 s += strlen(s);
1120                 *s++ = ',';
1121         }
1122         if (use_group) {
1123                 s[-1] = '}';
1124                 *s = 0;
1125         } else
1126                 s[-1] = 0;
1127         return 0;
1128 }
1129
1130 __weak bool arch_topdown_check_group(bool *warn)
1131 {
1132         *warn = false;
1133         return false;
1134 }
1135
1136 __weak void arch_topdown_group_warn(void)
1137 {
1138 }
1139
1140 /*
1141  * Add default attributes, if there were no attributes specified or
1142  * if -d/--detailed, -d -d or -d -d -d is used:
1143  */
1144 static int add_default_attributes(void)
1145 {
1146         int err;
1147         struct perf_event_attr default_attrs0[] = {
1148
1149   { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_TASK_CLOCK              },
1150   { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_CONTEXT_SWITCHES        },
1151   { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_CPU_MIGRATIONS          },
1152   { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_PAGE_FAULTS             },
1153
1154   { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_CPU_CYCLES              },
1155 };
1156         struct perf_event_attr frontend_attrs[] = {
1157   { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_STALLED_CYCLES_FRONTEND },
1158 };
1159         struct perf_event_attr backend_attrs[] = {
1160   { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_STALLED_CYCLES_BACKEND  },
1161 };
1162         struct perf_event_attr default_attrs1[] = {
1163   { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_INSTRUCTIONS            },
1164   { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_BRANCH_INSTRUCTIONS     },
1165   { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_BRANCH_MISSES           },
1166
1167 };
1168
1169 /*
1170  * Detailed stats (-d), covering the L1 and last level data caches:
1171  */
1172         struct perf_event_attr detailed_attrs[] = {
1173
1174   { .type = PERF_TYPE_HW_CACHE,
1175     .config =
1176          PERF_COUNT_HW_CACHE_L1D                <<  0  |
1177         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
1178         (PERF_COUNT_HW_CACHE_RESULT_ACCESS      << 16)                          },
1179
1180   { .type = PERF_TYPE_HW_CACHE,
1181     .config =
1182          PERF_COUNT_HW_CACHE_L1D                <<  0  |
1183         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
1184         (PERF_COUNT_HW_CACHE_RESULT_MISS        << 16)                          },
1185
1186   { .type = PERF_TYPE_HW_CACHE,
1187     .config =
1188          PERF_COUNT_HW_CACHE_LL                 <<  0  |
1189         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
1190         (PERF_COUNT_HW_CACHE_RESULT_ACCESS      << 16)                          },
1191
1192   { .type = PERF_TYPE_HW_CACHE,
1193     .config =
1194          PERF_COUNT_HW_CACHE_LL                 <<  0  |
1195         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
1196         (PERF_COUNT_HW_CACHE_RESULT_MISS        << 16)                          },
1197 };
1198
1199 /*
1200  * Very detailed stats (-d -d), covering the instruction cache and the TLB caches:
1201  */
1202         struct perf_event_attr very_detailed_attrs[] = {
1203
1204   { .type = PERF_TYPE_HW_CACHE,
1205     .config =
1206          PERF_COUNT_HW_CACHE_L1I                <<  0  |
1207         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
1208         (PERF_COUNT_HW_CACHE_RESULT_ACCESS      << 16)                          },
1209
1210   { .type = PERF_TYPE_HW_CACHE,
1211     .config =
1212          PERF_COUNT_HW_CACHE_L1I                <<  0  |
1213         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
1214         (PERF_COUNT_HW_CACHE_RESULT_MISS        << 16)                          },
1215
1216   { .type = PERF_TYPE_HW_CACHE,
1217     .config =
1218          PERF_COUNT_HW_CACHE_DTLB               <<  0  |
1219         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
1220         (PERF_COUNT_HW_CACHE_RESULT_ACCESS      << 16)                          },
1221
1222   { .type = PERF_TYPE_HW_CACHE,
1223     .config =
1224          PERF_COUNT_HW_CACHE_DTLB               <<  0  |
1225         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
1226         (PERF_COUNT_HW_CACHE_RESULT_MISS        << 16)                          },
1227
1228   { .type = PERF_TYPE_HW_CACHE,
1229     .config =
1230          PERF_COUNT_HW_CACHE_ITLB               <<  0  |
1231         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
1232         (PERF_COUNT_HW_CACHE_RESULT_ACCESS      << 16)                          },
1233
1234   { .type = PERF_TYPE_HW_CACHE,
1235     .config =
1236          PERF_COUNT_HW_CACHE_ITLB               <<  0  |
1237         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
1238         (PERF_COUNT_HW_CACHE_RESULT_MISS        << 16)                          },
1239
1240 };
1241
1242 /*
1243  * Very, very detailed stats (-d -d -d), adding prefetch events:
1244  */
1245         struct perf_event_attr very_very_detailed_attrs[] = {
1246
1247   { .type = PERF_TYPE_HW_CACHE,
1248     .config =
1249          PERF_COUNT_HW_CACHE_L1D                <<  0  |
1250         (PERF_COUNT_HW_CACHE_OP_PREFETCH        <<  8) |
1251         (PERF_COUNT_HW_CACHE_RESULT_ACCESS      << 16)                          },
1252
1253   { .type = PERF_TYPE_HW_CACHE,
1254     .config =
1255          PERF_COUNT_HW_CACHE_L1D                <<  0  |
1256         (PERF_COUNT_HW_CACHE_OP_PREFETCH        <<  8) |
1257         (PERF_COUNT_HW_CACHE_RESULT_MISS        << 16)                          },
1258 };
1259         struct parse_events_error errinfo;
1260
1261         /* Set attrs if no event is selected and !null_run: */
1262         if (stat_config.null_run)
1263                 return 0;
1264
1265         if (transaction_run) {
1266                 /* Handle -T as -M transaction. Once platform specific metrics
1267                  * support has been added to the json files, all archictures
1268                  * will use this approach. To determine transaction support
1269                  * on an architecture test for such a metric name.
1270                  */
1271                 if (metricgroup__has_metric("transaction")) {
1272                         struct option opt = { .value = &evsel_list };
1273
1274                         return metricgroup__parse_groups(&opt, "transaction",
1275                                                          &stat_config.metric_events);
1276                 }
1277
1278                 if (pmu_have_event("cpu", "cycles-ct") &&
1279                     pmu_have_event("cpu", "el-start"))
1280                         err = parse_events(evsel_list, transaction_attrs,
1281                                            &errinfo);
1282                 else
1283                         err = parse_events(evsel_list,
1284                                            transaction_limited_attrs,
1285                                            &errinfo);
1286                 if (err) {
1287                         fprintf(stderr, "Cannot set up transaction events\n");
1288                         parse_events_print_error(&errinfo, transaction_attrs);
1289                         return -1;
1290                 }
1291                 return 0;
1292         }
1293
1294         if (smi_cost) {
1295                 int smi;
1296
1297                 if (sysfs__read_int(FREEZE_ON_SMI_PATH, &smi) < 0) {
1298                         fprintf(stderr, "freeze_on_smi is not supported.\n");
1299                         return -1;
1300                 }
1301
1302                 if (!smi) {
1303                         if (sysfs__write_int(FREEZE_ON_SMI_PATH, 1) < 0) {
1304                                 fprintf(stderr, "Failed to set freeze_on_smi.\n");
1305                                 return -1;
1306                         }
1307                         smi_reset = true;
1308                 }
1309
1310                 if (pmu_have_event("msr", "aperf") &&
1311                     pmu_have_event("msr", "smi")) {
1312                         if (!force_metric_only)
1313                                 stat_config.metric_only = true;
1314                         err = parse_events(evsel_list, smi_cost_attrs, &errinfo);
1315                 } else {
1316                         fprintf(stderr, "To measure SMI cost, it needs "
1317                                 "msr/aperf/, msr/smi/ and cpu/cycles/ support\n");
1318                         parse_events_print_error(&errinfo, smi_cost_attrs);
1319                         return -1;
1320                 }
1321                 if (err) {
1322                         fprintf(stderr, "Cannot set up SMI cost events\n");
1323                         return -1;
1324                 }
1325                 return 0;
1326         }
1327
1328         if (topdown_run) {
1329                 char *str = NULL;
1330                 bool warn = false;
1331
1332                 if (stat_config.aggr_mode != AGGR_GLOBAL &&
1333                     stat_config.aggr_mode != AGGR_CORE) {
1334                         pr_err("top down event configuration requires --per-core mode\n");
1335                         return -1;
1336                 }
1337                 stat_config.aggr_mode = AGGR_CORE;
1338                 if (nr_cgroups || !target__has_cpu(&target)) {
1339                         pr_err("top down event configuration requires system-wide mode (-a)\n");
1340                         return -1;
1341                 }
1342
1343                 if (!force_metric_only)
1344                         stat_config.metric_only = true;
1345                 if (topdown_filter_events(topdown_attrs, &str,
1346                                 arch_topdown_check_group(&warn)) < 0) {
1347                         pr_err("Out of memory\n");
1348                         return -1;
1349                 }
1350                 if (topdown_attrs[0] && str) {
1351                         if (warn)
1352                                 arch_topdown_group_warn();
1353                         err = parse_events(evsel_list, str, &errinfo);
1354                         if (err) {
1355                                 fprintf(stderr,
1356                                         "Cannot set up top down events %s: %d\n",
1357                                         str, err);
1358                                 parse_events_print_error(&errinfo, str);
1359                                 free(str);
1360                                 return -1;
1361                         }
1362                 } else {
1363                         fprintf(stderr, "System does not support topdown\n");
1364                         return -1;
1365                 }
1366                 free(str);
1367         }
1368
1369         if (!evsel_list->nr_entries) {
1370                 if (target__has_cpu(&target))
1371                         default_attrs0[0].config = PERF_COUNT_SW_CPU_CLOCK;
1372
1373                 if (perf_evlist__add_default_attrs(evsel_list, default_attrs0) < 0)
1374                         return -1;
1375                 if (pmu_have_event("cpu", "stalled-cycles-frontend")) {
1376                         if (perf_evlist__add_default_attrs(evsel_list,
1377                                                 frontend_attrs) < 0)
1378                                 return -1;
1379                 }
1380                 if (pmu_have_event("cpu", "stalled-cycles-backend")) {
1381                         if (perf_evlist__add_default_attrs(evsel_list,
1382                                                 backend_attrs) < 0)
1383                                 return -1;
1384                 }
1385                 if (perf_evlist__add_default_attrs(evsel_list, default_attrs1) < 0)
1386                         return -1;
1387         }
1388
1389         /* Detailed events get appended to the event list: */
1390
1391         if (detailed_run <  1)
1392                 return 0;
1393
1394         /* Append detailed run extra attributes: */
1395         if (perf_evlist__add_default_attrs(evsel_list, detailed_attrs) < 0)
1396                 return -1;
1397
1398         if (detailed_run < 2)
1399                 return 0;
1400
1401         /* Append very detailed run extra attributes: */
1402         if (perf_evlist__add_default_attrs(evsel_list, very_detailed_attrs) < 0)
1403                 return -1;
1404
1405         if (detailed_run < 3)
1406                 return 0;
1407
1408         /* Append very, very detailed run extra attributes: */
1409         return perf_evlist__add_default_attrs(evsel_list, very_very_detailed_attrs);
1410 }
1411
1412 static const char * const stat_record_usage[] = {
1413         "perf stat record [<options>]",
1414         NULL,
1415 };
1416
1417 static void init_features(struct perf_session *session)
1418 {
1419         int feat;
1420
1421         for (feat = HEADER_FIRST_FEATURE; feat < HEADER_LAST_FEATURE; feat++)
1422                 perf_header__set_feat(&session->header, feat);
1423
1424         perf_header__clear_feat(&session->header, HEADER_DIR_FORMAT);
1425         perf_header__clear_feat(&session->header, HEADER_BUILD_ID);
1426         perf_header__clear_feat(&session->header, HEADER_TRACING_DATA);
1427         perf_header__clear_feat(&session->header, HEADER_BRANCH_STACK);
1428         perf_header__clear_feat(&session->header, HEADER_AUXTRACE);
1429 }
1430
1431 static int __cmd_record(int argc, const char **argv)
1432 {
1433         struct perf_session *session;
1434         struct perf_data *data = &perf_stat.data;
1435
1436         argc = parse_options(argc, argv, stat_options, stat_record_usage,
1437                              PARSE_OPT_STOP_AT_NON_OPTION);
1438
1439         if (output_name)
1440                 data->path = output_name;
1441
1442         if (stat_config.run_count != 1 || forever) {
1443                 pr_err("Cannot use -r option with perf stat record.\n");
1444                 return -1;
1445         }
1446
1447         session = perf_session__new(data, false, NULL);
1448         if (session == NULL) {
1449                 pr_err("Perf session creation failed.\n");
1450                 return -1;
1451         }
1452
1453         init_features(session);
1454
1455         session->evlist   = evsel_list;
1456         perf_stat.session = session;
1457         perf_stat.record  = true;
1458         return argc;
1459 }
1460
1461 static int process_stat_round_event(struct perf_session *session,
1462                                     union perf_event *event)
1463 {
1464         struct stat_round_event *stat_round = &event->stat_round;
1465         struct perf_evsel *counter;
1466         struct timespec tsh, *ts = NULL;
1467         const char **argv = session->header.env.cmdline_argv;
1468         int argc = session->header.env.nr_cmdline;
1469
1470         evlist__for_each_entry(evsel_list, counter)
1471                 perf_stat_process_counter(&stat_config, counter);
1472
1473         if (stat_round->type == PERF_STAT_ROUND_TYPE__FINAL)
1474                 update_stats(&walltime_nsecs_stats, stat_round->time);
1475
1476         if (stat_config.interval && stat_round->time) {
1477                 tsh.tv_sec  = stat_round->time / NSEC_PER_SEC;
1478                 tsh.tv_nsec = stat_round->time % NSEC_PER_SEC;
1479                 ts = &tsh;
1480         }
1481
1482         print_counters(ts, argc, argv);
1483         return 0;
1484 }
1485
1486 static
1487 int process_stat_config_event(struct perf_session *session,
1488                               union perf_event *event)
1489 {
1490         struct perf_tool *tool = session->tool;
1491         struct perf_stat *st = container_of(tool, struct perf_stat, tool);
1492
1493         perf_event__read_stat_config(&stat_config, &event->stat_config);
1494
1495         if (cpu_map__empty(st->cpus)) {
1496                 if (st->aggr_mode != AGGR_UNSET)
1497                         pr_warning("warning: processing task data, aggregation mode not set\n");
1498                 return 0;
1499         }
1500
1501         if (st->aggr_mode != AGGR_UNSET)
1502                 stat_config.aggr_mode = st->aggr_mode;
1503
1504         if (perf_stat.data.is_pipe)
1505                 perf_stat_init_aggr_mode();
1506         else
1507                 perf_stat_init_aggr_mode_file(st);
1508
1509         return 0;
1510 }
1511
1512 static int set_maps(struct perf_stat *st)
1513 {
1514         if (!st->cpus || !st->threads)
1515                 return 0;
1516
1517         if (WARN_ONCE(st->maps_allocated, "stats double allocation\n"))
1518                 return -EINVAL;
1519
1520         perf_evlist__set_maps(evsel_list, st->cpus, st->threads);
1521
1522         if (perf_evlist__alloc_stats(evsel_list, true))
1523                 return -ENOMEM;
1524
1525         st->maps_allocated = true;
1526         return 0;
1527 }
1528
1529 static
1530 int process_thread_map_event(struct perf_session *session,
1531                              union perf_event *event)
1532 {
1533         struct perf_tool *tool = session->tool;
1534         struct perf_stat *st = container_of(tool, struct perf_stat, tool);
1535
1536         if (st->threads) {
1537                 pr_warning("Extra thread map event, ignoring.\n");
1538                 return 0;
1539         }
1540
1541         st->threads = thread_map__new_event(&event->thread_map);
1542         if (!st->threads)
1543                 return -ENOMEM;
1544
1545         return set_maps(st);
1546 }
1547
1548 static
1549 int process_cpu_map_event(struct perf_session *session,
1550                           union perf_event *event)
1551 {
1552         struct perf_tool *tool = session->tool;
1553         struct perf_stat *st = container_of(tool, struct perf_stat, tool);
1554         struct cpu_map *cpus;
1555
1556         if (st->cpus) {
1557                 pr_warning("Extra cpu map event, ignoring.\n");
1558                 return 0;
1559         }
1560
1561         cpus = cpu_map__new_data(&event->cpu_map.data);
1562         if (!cpus)
1563                 return -ENOMEM;
1564
1565         st->cpus = cpus;
1566         return set_maps(st);
1567 }
1568
1569 static int runtime_stat_new(struct perf_stat_config *config, int nthreads)
1570 {
1571         int i;
1572
1573         config->stats = calloc(nthreads, sizeof(struct runtime_stat));
1574         if (!config->stats)
1575                 return -1;
1576
1577         config->stats_num = nthreads;
1578
1579         for (i = 0; i < nthreads; i++)
1580                 runtime_stat__init(&config->stats[i]);
1581
1582         return 0;
1583 }
1584
1585 static void runtime_stat_delete(struct perf_stat_config *config)
1586 {
1587         int i;
1588
1589         if (!config->stats)
1590                 return;
1591
1592         for (i = 0; i < config->stats_num; i++)
1593                 runtime_stat__exit(&config->stats[i]);
1594
1595         zfree(&config->stats);
1596 }
1597
1598 static const char * const stat_report_usage[] = {
1599         "perf stat report [<options>]",
1600         NULL,
1601 };
1602
1603 static struct perf_stat perf_stat = {
1604         .tool = {
1605                 .attr           = perf_event__process_attr,
1606                 .event_update   = perf_event__process_event_update,
1607                 .thread_map     = process_thread_map_event,
1608                 .cpu_map        = process_cpu_map_event,
1609                 .stat_config    = process_stat_config_event,
1610                 .stat           = perf_event__process_stat_event,
1611                 .stat_round     = process_stat_round_event,
1612         },
1613         .aggr_mode = AGGR_UNSET,
1614 };
1615
1616 static int __cmd_report(int argc, const char **argv)
1617 {
1618         struct perf_session *session;
1619         const struct option options[] = {
1620         OPT_STRING('i', "input", &input_name, "file", "input file name"),
1621         OPT_SET_UINT(0, "per-socket", &perf_stat.aggr_mode,
1622                      "aggregate counts per processor socket", AGGR_SOCKET),
1623         OPT_SET_UINT(0, "per-die", &perf_stat.aggr_mode,
1624                      "aggregate counts per processor die", AGGR_DIE),
1625         OPT_SET_UINT(0, "per-core", &perf_stat.aggr_mode,
1626                      "aggregate counts per physical processor core", AGGR_CORE),
1627         OPT_SET_UINT('A', "no-aggr", &perf_stat.aggr_mode,
1628                      "disable CPU count aggregation", AGGR_NONE),
1629         OPT_END()
1630         };
1631         struct stat st;
1632         int ret;
1633
1634         argc = parse_options(argc, argv, options, stat_report_usage, 0);
1635
1636         if (!input_name || !strlen(input_name)) {
1637                 if (!fstat(STDIN_FILENO, &st) && S_ISFIFO(st.st_mode))
1638                         input_name = "-";
1639                 else
1640                         input_name = "perf.data";
1641         }
1642
1643         perf_stat.data.path = input_name;
1644         perf_stat.data.mode = PERF_DATA_MODE_READ;
1645
1646         session = perf_session__new(&perf_stat.data, false, &perf_stat.tool);
1647         if (session == NULL)
1648                 return -1;
1649
1650         perf_stat.session  = session;
1651         stat_config.output = stderr;
1652         evsel_list         = session->evlist;
1653
1654         ret = perf_session__process_events(session);
1655         if (ret)
1656                 return ret;
1657
1658         perf_session__delete(session);
1659         return 0;
1660 }
1661
1662 static void setup_system_wide(int forks)
1663 {
1664         /*
1665          * Make system wide (-a) the default target if
1666          * no target was specified and one of following
1667          * conditions is met:
1668          *
1669          *   - there's no workload specified
1670          *   - there is workload specified but all requested
1671          *     events are system wide events
1672          */
1673         if (!target__none(&target))
1674                 return;
1675
1676         if (!forks)
1677                 target.system_wide = true;
1678         else {
1679                 struct perf_evsel *counter;
1680
1681                 evlist__for_each_entry(evsel_list, counter) {
1682                         if (!counter->system_wide)
1683                                 return;
1684                 }
1685
1686                 if (evsel_list->nr_entries)
1687                         target.system_wide = true;
1688         }
1689 }
1690
1691 int cmd_stat(int argc, const char **argv)
1692 {
1693         const char * const stat_usage[] = {
1694                 "perf stat [<options>] [<command>]",
1695                 NULL
1696         };
1697         int status = -EINVAL, run_idx;
1698         const char *mode;
1699         FILE *output = stderr;
1700         unsigned int interval, timeout;
1701         const char * const stat_subcommands[] = { "record", "report" };
1702
1703         setlocale(LC_ALL, "");
1704
1705         evsel_list = perf_evlist__new();
1706         if (evsel_list == NULL)
1707                 return -ENOMEM;
1708
1709         parse_events__shrink_config_terms();
1710
1711         /* String-parsing callback-based options would segfault when negated */
1712         set_option_flag(stat_options, 'e', "event", PARSE_OPT_NONEG);
1713         set_option_flag(stat_options, 'M', "metrics", PARSE_OPT_NONEG);
1714         set_option_flag(stat_options, 'G', "cgroup", PARSE_OPT_NONEG);
1715
1716         argc = parse_options_subcommand(argc, argv, stat_options, stat_subcommands,
1717                                         (const char **) stat_usage,
1718                                         PARSE_OPT_STOP_AT_NON_OPTION);
1719         perf_stat__collect_metric_expr(evsel_list);
1720         perf_stat__init_shadow_stats();
1721
1722         if (stat_config.csv_sep) {
1723                 stat_config.csv_output = true;
1724                 if (!strcmp(stat_config.csv_sep, "\\t"))
1725                         stat_config.csv_sep = "\t";
1726         } else
1727                 stat_config.csv_sep = DEFAULT_SEPARATOR;
1728
1729         if (argc && !strncmp(argv[0], "rec", 3)) {
1730                 argc = __cmd_record(argc, argv);
1731                 if (argc < 0)
1732                         return -1;
1733         } else if (argc && !strncmp(argv[0], "rep", 3))
1734                 return __cmd_report(argc, argv);
1735
1736         interval = stat_config.interval;
1737         timeout = stat_config.timeout;
1738
1739         /*
1740          * For record command the -o is already taken care of.
1741          */
1742         if (!STAT_RECORD && output_name && strcmp(output_name, "-"))
1743                 output = NULL;
1744
1745         if (output_name && output_fd) {
1746                 fprintf(stderr, "cannot use both --output and --log-fd\n");
1747                 parse_options_usage(stat_usage, stat_options, "o", 1);
1748                 parse_options_usage(NULL, stat_options, "log-fd", 0);
1749                 goto out;
1750         }
1751
1752         if (stat_config.metric_only && stat_config.aggr_mode == AGGR_THREAD) {
1753                 fprintf(stderr, "--metric-only is not supported with --per-thread\n");
1754                 goto out;
1755         }
1756
1757         if (stat_config.metric_only && stat_config.run_count > 1) {
1758                 fprintf(stderr, "--metric-only is not supported with -r\n");
1759                 goto out;
1760         }
1761
1762         if (stat_config.walltime_run_table && stat_config.run_count <= 1) {
1763                 fprintf(stderr, "--table is only supported with -r\n");
1764                 parse_options_usage(stat_usage, stat_options, "r", 1);
1765                 parse_options_usage(NULL, stat_options, "table", 0);
1766                 goto out;
1767         }
1768
1769         if (output_fd < 0) {
1770                 fprintf(stderr, "argument to --log-fd must be a > 0\n");
1771                 parse_options_usage(stat_usage, stat_options, "log-fd", 0);
1772                 goto out;
1773         }
1774
1775         if (!output) {
1776                 struct timespec tm;
1777                 mode = append_file ? "a" : "w";
1778
1779                 output = fopen(output_name, mode);
1780                 if (!output) {
1781                         perror("failed to create output file");
1782                         return -1;
1783                 }
1784                 clock_gettime(CLOCK_REALTIME, &tm);
1785                 fprintf(output, "# started on %s\n", ctime(&tm.tv_sec));
1786         } else if (output_fd > 0) {
1787                 mode = append_file ? "a" : "w";
1788                 output = fdopen(output_fd, mode);
1789                 if (!output) {
1790                         perror("Failed opening logfd");
1791                         return -errno;
1792                 }
1793         }
1794
1795         stat_config.output = output;
1796
1797         /*
1798          * let the spreadsheet do the pretty-printing
1799          */
1800         if (stat_config.csv_output) {
1801                 /* User explicitly passed -B? */
1802                 if (big_num_opt == 1) {
1803                         fprintf(stderr, "-B option not supported with -x\n");
1804                         parse_options_usage(stat_usage, stat_options, "B", 1);
1805                         parse_options_usage(NULL, stat_options, "x", 1);
1806                         goto out;
1807                 } else /* Nope, so disable big number formatting */
1808                         stat_config.big_num = false;
1809         } else if (big_num_opt == 0) /* User passed --no-big-num */
1810                 stat_config.big_num = false;
1811
1812         setup_system_wide(argc);
1813
1814         /*
1815          * Display user/system times only for single
1816          * run and when there's specified tracee.
1817          */
1818         if ((stat_config.run_count == 1) && target__none(&target))
1819                 stat_config.ru_display = true;
1820
1821         if (stat_config.run_count < 0) {
1822                 pr_err("Run count must be a positive number\n");
1823                 parse_options_usage(stat_usage, stat_options, "r", 1);
1824                 goto out;
1825         } else if (stat_config.run_count == 0) {
1826                 forever = true;
1827                 stat_config.run_count = 1;
1828         }
1829
1830         if (stat_config.walltime_run_table) {
1831                 stat_config.walltime_run = zalloc(stat_config.run_count * sizeof(stat_config.walltime_run[0]));
1832                 if (!stat_config.walltime_run) {
1833                         pr_err("failed to setup -r option");
1834                         goto out;
1835                 }
1836         }
1837
1838         if ((stat_config.aggr_mode == AGGR_THREAD) &&
1839                 !target__has_task(&target)) {
1840                 if (!target.system_wide || target.cpu_list) {
1841                         fprintf(stderr, "The --per-thread option is only "
1842                                 "available when monitoring via -p -t -a "
1843                                 "options or only --per-thread.\n");
1844                         parse_options_usage(NULL, stat_options, "p", 1);
1845                         parse_options_usage(NULL, stat_options, "t", 1);
1846                         goto out;
1847                 }
1848         }
1849
1850         /*
1851          * no_aggr, cgroup are for system-wide only
1852          * --per-thread is aggregated per thread, we dont mix it with cpu mode
1853          */
1854         if (((stat_config.aggr_mode != AGGR_GLOBAL &&
1855               stat_config.aggr_mode != AGGR_THREAD) || nr_cgroups) &&
1856             !target__has_cpu(&target)) {
1857                 fprintf(stderr, "both cgroup and no-aggregation "
1858                         "modes only available in system-wide mode\n");
1859
1860                 parse_options_usage(stat_usage, stat_options, "G", 1);
1861                 parse_options_usage(NULL, stat_options, "A", 1);
1862                 parse_options_usage(NULL, stat_options, "a", 1);
1863                 goto out;
1864         }
1865
1866         if (add_default_attributes())
1867                 goto out;
1868
1869         target__validate(&target);
1870
1871         if ((stat_config.aggr_mode == AGGR_THREAD) && (target.system_wide))
1872                 target.per_thread = true;
1873
1874         if (perf_evlist__create_maps(evsel_list, &target) < 0) {
1875                 if (target__has_task(&target)) {
1876                         pr_err("Problems finding threads of monitor\n");
1877                         parse_options_usage(stat_usage, stat_options, "p", 1);
1878                         parse_options_usage(NULL, stat_options, "t", 1);
1879                 } else if (target__has_cpu(&target)) {
1880                         perror("failed to parse CPUs map");
1881                         parse_options_usage(stat_usage, stat_options, "C", 1);
1882                         parse_options_usage(NULL, stat_options, "a", 1);
1883                 }
1884                 goto out;
1885         }
1886
1887         /*
1888          * Initialize thread_map with comm names,
1889          * so we could print it out on output.
1890          */
1891         if (stat_config.aggr_mode == AGGR_THREAD) {
1892                 thread_map__read_comms(evsel_list->threads);
1893                 if (target.system_wide) {
1894                         if (runtime_stat_new(&stat_config,
1895                                 thread_map__nr(evsel_list->threads))) {
1896                                 goto out;
1897                         }
1898                 }
1899         }
1900
1901         if (stat_config.times && interval)
1902                 interval_count = true;
1903         else if (stat_config.times && !interval) {
1904                 pr_err("interval-count option should be used together with "
1905                                 "interval-print.\n");
1906                 parse_options_usage(stat_usage, stat_options, "interval-count", 0);
1907                 parse_options_usage(stat_usage, stat_options, "I", 1);
1908                 goto out;
1909         }
1910
1911         if (timeout && timeout < 100) {
1912                 if (timeout < 10) {
1913                         pr_err("timeout must be >= 10ms.\n");
1914                         parse_options_usage(stat_usage, stat_options, "timeout", 0);
1915                         goto out;
1916                 } else
1917                         pr_warning("timeout < 100ms. "
1918                                    "The overhead percentage could be high in some cases. "
1919                                    "Please proceed with caution.\n");
1920         }
1921         if (timeout && interval) {
1922                 pr_err("timeout option is not supported with interval-print.\n");
1923                 parse_options_usage(stat_usage, stat_options, "timeout", 0);
1924                 parse_options_usage(stat_usage, stat_options, "I", 1);
1925                 goto out;
1926         }
1927
1928         if (perf_evlist__alloc_stats(evsel_list, interval))
1929                 goto out;
1930
1931         if (perf_stat_init_aggr_mode())
1932                 goto out;
1933
1934         /*
1935          * Set sample_type to PERF_SAMPLE_IDENTIFIER, which should be harmless
1936          * while avoiding that older tools show confusing messages.
1937          *
1938          * However for pipe sessions we need to keep it zero,
1939          * because script's perf_evsel__check_attr is triggered
1940          * by attr->sample_type != 0, and we can't run it on
1941          * stat sessions.
1942          */
1943         stat_config.identifier = !(STAT_RECORD && perf_stat.data.is_pipe);
1944
1945         /*
1946          * We dont want to block the signals - that would cause
1947          * child tasks to inherit that and Ctrl-C would not work.
1948          * What we want is for Ctrl-C to work in the exec()-ed
1949          * task, but being ignored by perf stat itself:
1950          */
1951         atexit(sig_atexit);
1952         if (!forever)
1953                 signal(SIGINT,  skip_signal);
1954         signal(SIGCHLD, skip_signal);
1955         signal(SIGALRM, skip_signal);
1956         signal(SIGABRT, skip_signal);
1957
1958         status = 0;
1959         for (run_idx = 0; forever || run_idx < stat_config.run_count; run_idx++) {
1960                 if (stat_config.run_count != 1 && verbose > 0)
1961                         fprintf(output, "[ perf stat: executing run #%d ... ]\n",
1962                                 run_idx + 1);
1963
1964                 status = run_perf_stat(argc, argv, run_idx);
1965                 if (forever && status != -1) {
1966                         print_counters(NULL, argc, argv);
1967                         perf_stat__reset_stats();
1968                 }
1969         }
1970
1971         if (!forever && status != -1 && !interval)
1972                 print_counters(NULL, argc, argv);
1973
1974         if (STAT_RECORD) {
1975                 /*
1976                  * We synthesize the kernel mmap record just so that older tools
1977                  * don't emit warnings about not being able to resolve symbols
1978                  * due to /proc/sys/kernel/kptr_restrict settings and instear provide
1979                  * a saner message about no samples being in the perf.data file.
1980                  *
1981                  * This also serves to suppress a warning about f_header.data.size == 0
1982                  * in header.c at the moment 'perf stat record' gets introduced, which
1983                  * is not really needed once we start adding the stat specific PERF_RECORD_
1984                  * records, but the need to suppress the kptr_restrict messages in older
1985                  * tools remain  -acme
1986                  */
1987                 int fd = perf_data__fd(&perf_stat.data);
1988                 int err = perf_event__synthesize_kernel_mmap((void *)&perf_stat,
1989                                                              process_synthesized_event,
1990                                                              &perf_stat.session->machines.host);
1991                 if (err) {
1992                         pr_warning("Couldn't synthesize the kernel mmap record, harmless, "
1993                                    "older tools may produce warnings about this file\n.");
1994                 }
1995
1996                 if (!interval) {
1997                         if (WRITE_STAT_ROUND_EVENT(walltime_nsecs_stats.max, FINAL))
1998                                 pr_err("failed to write stat round event\n");
1999                 }
2000
2001                 if (!perf_stat.data.is_pipe) {
2002                         perf_stat.session->header.data_size += perf_stat.bytes_written;
2003                         perf_session__write_header(perf_stat.session, evsel_list, fd, true);
2004                 }
2005
2006                 perf_evlist__close(evsel_list);
2007                 perf_session__delete(perf_stat.session);
2008         }
2009
2010         perf_stat__exit_aggr_mode();
2011         perf_evlist__free_stats(evsel_list);
2012 out:
2013         zfree(&stat_config.walltime_run);
2014
2015         if (smi_cost && smi_reset)
2016                 sysfs__write_int(FREEZE_ON_SMI_PATH, 0);
2017
2018         perf_evlist__delete(evsel_list);
2019
2020         runtime_stat_delete(&stat_config);
2021
2022         return status;
2023 }