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 "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/evlist-hybrid.h" 52 #include "util/evsel.h" 53 #include "util/debug.h" 54 #include "util/color.h" 55 #include "util/stat.h" 56 #include "util/header.h" 57 #include "util/cpumap.h" 58 #include "util/thread_map.h" 59 #include "util/counts.h" 60 #include "util/topdown.h" 61 #include "util/session.h" 62 #include "util/tool.h" 63 #include "util/string2.h" 64 #include "util/metricgroup.h" 65 #include "util/synthetic-events.h" 66 #include "util/target.h" 67 #include "util/time-utils.h" 68 #include "util/top.h" 69 #include "util/affinity.h" 70 #include "util/pfm.h" 71 #include "util/bpf_counter.h" 72 #include "util/iostat.h" 73 #include "util/pmu-hybrid.h" 74 #include "asm/bug.h" 75 76 #include <linux/time64.h> 77 #include <linux/zalloc.h> 78 #include <api/fs/fs.h> 79 #include <errno.h> 80 #include <signal.h> 81 #include <stdlib.h> 82 #include <sys/prctl.h> 83 #include <inttypes.h> 84 #include <locale.h> 85 #include <math.h> 86 #include <sys/types.h> 87 #include <sys/stat.h> 88 #include <sys/wait.h> 89 #include <unistd.h> 90 #include <sys/time.h> 91 #include <sys/resource.h> 92 #include <linux/err.h> 93 94 #include <linux/ctype.h> 95 #include <perf/evlist.h> 96 #include <internal/threadmap.h> 97 98 #define DEFAULT_SEPARATOR " " 99 #define FREEZE_ON_SMI_PATH "devices/cpu/freeze_on_smi" 100 101 static void print_counters(struct timespec *ts, int argc, const char **argv); 102 103 /* Default events used for perf stat -T */ 104 static const char *transaction_attrs = { 105 "task-clock," 106 "{" 107 "instructions," 108 "cycles," 109 "cpu/cycles-t/," 110 "cpu/tx-start/," 111 "cpu/el-start/," 112 "cpu/cycles-ct/" 113 "}" 114 }; 115 116 /* More limited version when the CPU does not have all events. */ 117 static const char * transaction_limited_attrs = { 118 "task-clock," 119 "{" 120 "instructions," 121 "cycles," 122 "cpu/cycles-t/," 123 "cpu/tx-start/" 124 "}" 125 }; 126 127 static const char * topdown_attrs[] = { 128 "topdown-total-slots", 129 "topdown-slots-retired", 130 "topdown-recovery-bubbles", 131 "topdown-fetch-bubbles", 132 "topdown-slots-issued", 133 NULL, 134 }; 135 136 static const char *topdown_metric_attrs[] = { 137 "slots", 138 "topdown-retiring", 139 "topdown-bad-spec", 140 "topdown-fe-bound", 141 "topdown-be-bound", 142 NULL, 143 }; 144 145 static const char *topdown_metric_L2_attrs[] = { 146 "slots", 147 "topdown-retiring", 148 "topdown-bad-spec", 149 "topdown-fe-bound", 150 "topdown-be-bound", 151 "topdown-heavy-ops", 152 "topdown-br-mispredict", 153 "topdown-fetch-lat", 154 "topdown-mem-bound", 155 NULL, 156 }; 157 158 #define TOPDOWN_MAX_LEVEL 2 159 160 static const char *smi_cost_attrs = { 161 "{" 162 "msr/aperf/," 163 "msr/smi/," 164 "cycles" 165 "}" 166 }; 167 168 static struct evlist *evsel_list; 169 static bool all_counters_use_bpf = true; 170 171 static struct target target = { 172 .uid = UINT_MAX, 173 }; 174 175 #define METRIC_ONLY_LEN 20 176 177 static volatile sig_atomic_t child_pid = -1; 178 static int detailed_run = 0; 179 static bool transaction_run; 180 static bool topdown_run = false; 181 static bool smi_cost = false; 182 static bool smi_reset = false; 183 static int big_num_opt = -1; 184 static const char *pre_cmd = NULL; 185 static const char *post_cmd = NULL; 186 static bool sync_run = false; 187 static bool forever = false; 188 static bool force_metric_only = false; 189 static struct timespec ref_time; 190 static bool append_file; 191 static bool interval_count; 192 static const char *output_name; 193 static int output_fd; 194 static char *metrics; 195 196 struct perf_stat { 197 bool record; 198 struct perf_data data; 199 struct perf_session *session; 200 u64 bytes_written; 201 struct perf_tool tool; 202 bool maps_allocated; 203 struct perf_cpu_map *cpus; 204 struct perf_thread_map *threads; 205 enum aggr_mode aggr_mode; 206 }; 207 208 static struct perf_stat perf_stat; 209 #define STAT_RECORD perf_stat.record 210 211 static volatile sig_atomic_t done = 0; 212 213 static struct perf_stat_config stat_config = { 214 .aggr_mode = AGGR_GLOBAL, 215 .scale = true, 216 .unit_width = 4, /* strlen("unit") */ 217 .run_count = 1, 218 .metric_only_len = METRIC_ONLY_LEN, 219 .walltime_nsecs_stats = &walltime_nsecs_stats, 220 .ru_stats = &ru_stats, 221 .big_num = true, 222 .ctl_fd = -1, 223 .ctl_fd_ack = -1, 224 .iostat_run = false, 225 }; 226 227 static bool cpus_map_matched(struct evsel *a, struct evsel *b) 228 { 229 if (!a->core.cpus && !b->core.cpus) 230 return true; 231 232 if (!a->core.cpus || !b->core.cpus) 233 return false; 234 235 if (perf_cpu_map__nr(a->core.cpus) != perf_cpu_map__nr(b->core.cpus)) 236 return false; 237 238 for (int i = 0; i < perf_cpu_map__nr(a->core.cpus); i++) { 239 if (perf_cpu_map__cpu(a->core.cpus, i).cpu != 240 perf_cpu_map__cpu(b->core.cpus, i).cpu) 241 return false; 242 } 243 244 return true; 245 } 246 247 static void evlist__check_cpu_maps(struct evlist *evlist) 248 { 249 struct evsel *evsel, *pos, *leader; 250 char buf[1024]; 251 252 if (evlist__has_hybrid(evlist)) 253 evlist__warn_hybrid_group(evlist); 254 255 evlist__for_each_entry(evlist, evsel) { 256 leader = evsel__leader(evsel); 257 258 /* Check that leader matches cpus with each member. */ 259 if (leader == evsel) 260 continue; 261 if (cpus_map_matched(leader, evsel)) 262 continue; 263 264 /* If there's mismatch disable the group and warn user. */ 265 WARN_ONCE(1, "WARNING: grouped events cpus do not match, disabling group:\n"); 266 evsel__group_desc(leader, buf, sizeof(buf)); 267 pr_warning(" %s\n", buf); 268 269 if (verbose > 0) { 270 cpu_map__snprint(leader->core.cpus, buf, sizeof(buf)); 271 pr_warning(" %s: %s\n", leader->name, buf); 272 cpu_map__snprint(evsel->core.cpus, buf, sizeof(buf)); 273 pr_warning(" %s: %s\n", evsel->name, buf); 274 } 275 276 for_each_group_evsel(pos, leader) 277 evsel__remove_from_group(pos, leader); 278 } 279 } 280 281 static inline void diff_timespec(struct timespec *r, struct timespec *a, 282 struct timespec *b) 283 { 284 r->tv_sec = a->tv_sec - b->tv_sec; 285 if (a->tv_nsec < b->tv_nsec) { 286 r->tv_nsec = a->tv_nsec + NSEC_PER_SEC - b->tv_nsec; 287 r->tv_sec--; 288 } else { 289 r->tv_nsec = a->tv_nsec - b->tv_nsec ; 290 } 291 } 292 293 static void perf_stat__reset_stats(void) 294 { 295 evlist__reset_stats(evsel_list); 296 perf_stat__reset_shadow_stats(); 297 } 298 299 static int process_synthesized_event(struct perf_tool *tool __maybe_unused, 300 union perf_event *event, 301 struct perf_sample *sample __maybe_unused, 302 struct machine *machine __maybe_unused) 303 { 304 if (perf_data__write(&perf_stat.data, event, event->header.size) < 0) { 305 pr_err("failed to write perf data, error: %m\n"); 306 return -1; 307 } 308 309 perf_stat.bytes_written += event->header.size; 310 return 0; 311 } 312 313 static int write_stat_round_event(u64 tm, u64 type) 314 { 315 return perf_event__synthesize_stat_round(NULL, tm, type, 316 process_synthesized_event, 317 NULL); 318 } 319 320 #define WRITE_STAT_ROUND_EVENT(time, interval) \ 321 write_stat_round_event(time, PERF_STAT_ROUND_TYPE__ ## interval) 322 323 #define SID(e, x, y) xyarray__entry(e->core.sample_id, x, y) 324 325 static int evsel__write_stat_event(struct evsel *counter, int cpu_map_idx, u32 thread, 326 struct perf_counts_values *count) 327 { 328 struct perf_sample_id *sid = SID(counter, cpu_map_idx, thread); 329 struct perf_cpu cpu = perf_cpu_map__cpu(evsel__cpus(counter), cpu_map_idx); 330 331 return perf_event__synthesize_stat(NULL, cpu, thread, sid->id, count, 332 process_synthesized_event, NULL); 333 } 334 335 static int read_single_counter(struct evsel *counter, int cpu_map_idx, 336 int thread, struct timespec *rs) 337 { 338 switch(counter->tool_event) { 339 case PERF_TOOL_DURATION_TIME: { 340 u64 val = rs->tv_nsec + rs->tv_sec*1000000000ULL; 341 struct perf_counts_values *count = 342 perf_counts(counter->counts, cpu_map_idx, thread); 343 count->ena = count->run = val; 344 count->val = val; 345 return 0; 346 } 347 case PERF_TOOL_USER_TIME: 348 case PERF_TOOL_SYSTEM_TIME: { 349 u64 val; 350 struct perf_counts_values *count = 351 perf_counts(counter->counts, cpu_map_idx, thread); 352 if (counter->tool_event == PERF_TOOL_USER_TIME) 353 val = ru_stats.ru_utime_usec_stat.mean; 354 else 355 val = ru_stats.ru_stime_usec_stat.mean; 356 count->ena = count->run = val; 357 count->val = val; 358 return 0; 359 } 360 default: 361 case PERF_TOOL_NONE: 362 return evsel__read_counter(counter, cpu_map_idx, thread); 363 case PERF_TOOL_MAX: 364 /* This should never be reached */ 365 return 0; 366 } 367 } 368 369 /* 370 * Read out the results of a single counter: 371 * do not aggregate counts across CPUs in system-wide mode 372 */ 373 static int read_counter_cpu(struct evsel *counter, struct timespec *rs, int cpu_map_idx) 374 { 375 int nthreads = perf_thread_map__nr(evsel_list->core.threads); 376 int thread; 377 378 if (!counter->supported) 379 return -ENOENT; 380 381 for (thread = 0; thread < nthreads; thread++) { 382 struct perf_counts_values *count; 383 384 count = perf_counts(counter->counts, cpu_map_idx, thread); 385 386 /* 387 * The leader's group read loads data into its group members 388 * (via evsel__read_counter()) and sets their count->loaded. 389 */ 390 if (!perf_counts__is_loaded(counter->counts, cpu_map_idx, thread) && 391 read_single_counter(counter, cpu_map_idx, thread, rs)) { 392 counter->counts->scaled = -1; 393 perf_counts(counter->counts, cpu_map_idx, thread)->ena = 0; 394 perf_counts(counter->counts, cpu_map_idx, thread)->run = 0; 395 return -1; 396 } 397 398 perf_counts__set_loaded(counter->counts, cpu_map_idx, thread, false); 399 400 if (STAT_RECORD) { 401 if (evsel__write_stat_event(counter, cpu_map_idx, thread, count)) { 402 pr_err("failed to write stat event\n"); 403 return -1; 404 } 405 } 406 407 if (verbose > 1) { 408 fprintf(stat_config.output, 409 "%s: %d: %" PRIu64 " %" PRIu64 " %" PRIu64 "\n", 410 evsel__name(counter), 411 perf_cpu_map__cpu(evsel__cpus(counter), 412 cpu_map_idx).cpu, 413 count->val, count->ena, count->run); 414 } 415 } 416 417 return 0; 418 } 419 420 static int read_affinity_counters(struct timespec *rs) 421 { 422 struct evlist_cpu_iterator evlist_cpu_itr; 423 struct affinity saved_affinity, *affinity; 424 425 if (all_counters_use_bpf) 426 return 0; 427 428 if (!target__has_cpu(&target) || target__has_per_thread(&target)) 429 affinity = NULL; 430 else if (affinity__setup(&saved_affinity) < 0) 431 return -1; 432 else 433 affinity = &saved_affinity; 434 435 evlist__for_each_cpu(evlist_cpu_itr, evsel_list, affinity) { 436 struct evsel *counter = evlist_cpu_itr.evsel; 437 438 if (evsel__is_bpf(counter)) 439 continue; 440 441 if (!counter->err) { 442 counter->err = read_counter_cpu(counter, rs, 443 evlist_cpu_itr.cpu_map_idx); 444 } 445 } 446 if (affinity) 447 affinity__cleanup(&saved_affinity); 448 449 return 0; 450 } 451 452 static int read_bpf_map_counters(void) 453 { 454 struct evsel *counter; 455 int err; 456 457 evlist__for_each_entry(evsel_list, counter) { 458 if (!evsel__is_bpf(counter)) 459 continue; 460 461 err = bpf_counter__read(counter); 462 if (err) 463 return err; 464 } 465 return 0; 466 } 467 468 static int read_counters(struct timespec *rs) 469 { 470 if (!stat_config.stop_read_counter) { 471 if (read_bpf_map_counters() || 472 read_affinity_counters(rs)) 473 return -1; 474 } 475 return 0; 476 } 477 478 static void process_counters(void) 479 { 480 struct evsel *counter; 481 482 evlist__for_each_entry(evsel_list, counter) { 483 if (counter->err) 484 pr_debug("failed to read counter %s\n", counter->name); 485 if (counter->err == 0 && perf_stat_process_counter(&stat_config, counter)) 486 pr_warning("failed to process counter %s\n", counter->name); 487 counter->err = 0; 488 } 489 490 perf_stat_merge_counters(&stat_config, evsel_list); 491 perf_stat_process_percore(&stat_config, evsel_list); 492 perf_stat_process_shadow_stats(&stat_config, evsel_list); 493 } 494 495 static void process_interval(void) 496 { 497 struct timespec ts, rs; 498 499 clock_gettime(CLOCK_MONOTONIC, &ts); 500 diff_timespec(&rs, &ts, &ref_time); 501 502 perf_stat__reset_shadow_per_stat(&rt_stat); 503 evlist__reset_aggr_stats(evsel_list); 504 505 if (read_counters(&rs) == 0) 506 process_counters(); 507 508 if (STAT_RECORD) { 509 if (WRITE_STAT_ROUND_EVENT(rs.tv_sec * NSEC_PER_SEC + rs.tv_nsec, INTERVAL)) 510 pr_err("failed to write stat round event\n"); 511 } 512 513 init_stats(&walltime_nsecs_stats); 514 update_stats(&walltime_nsecs_stats, stat_config.interval * 1000000ULL); 515 print_counters(&rs, 0, NULL); 516 } 517 518 static bool handle_interval(unsigned int interval, int *times) 519 { 520 if (interval) { 521 process_interval(); 522 if (interval_count && !(--(*times))) 523 return true; 524 } 525 return false; 526 } 527 528 static int enable_counters(void) 529 { 530 struct evsel *evsel; 531 int err; 532 533 evlist__for_each_entry(evsel_list, evsel) { 534 if (!evsel__is_bpf(evsel)) 535 continue; 536 537 err = bpf_counter__enable(evsel); 538 if (err) 539 return err; 540 } 541 542 /* 543 * We need to enable counters only if: 544 * - we don't have tracee (attaching to task or cpu) 545 * - we have initial delay configured 546 */ 547 if (!target__none(&target)) { 548 if (!all_counters_use_bpf) 549 evlist__enable(evsel_list); 550 } 551 return 0; 552 } 553 554 static void disable_counters(void) 555 { 556 struct evsel *counter; 557 558 /* 559 * If we don't have tracee (attaching to task or cpu), counters may 560 * still be running. To get accurate group ratios, we must stop groups 561 * from counting before reading their constituent counters. 562 */ 563 if (!target__none(&target)) { 564 evlist__for_each_entry(evsel_list, counter) 565 bpf_counter__disable(counter); 566 if (!all_counters_use_bpf) 567 evlist__disable(evsel_list); 568 } 569 } 570 571 static volatile sig_atomic_t workload_exec_errno; 572 573 /* 574 * evlist__prepare_workload will send a SIGUSR1 575 * if the fork fails, since we asked by setting its 576 * want_signal to true. 577 */ 578 static void workload_exec_failed_signal(int signo __maybe_unused, siginfo_t *info, 579 void *ucontext __maybe_unused) 580 { 581 workload_exec_errno = info->si_value.sival_int; 582 } 583 584 static bool evsel__should_store_id(struct evsel *counter) 585 { 586 return STAT_RECORD || counter->core.attr.read_format & PERF_FORMAT_ID; 587 } 588 589 static bool is_target_alive(struct target *_target, 590 struct perf_thread_map *threads) 591 { 592 struct stat st; 593 int i; 594 595 if (!target__has_task(_target)) 596 return true; 597 598 for (i = 0; i < threads->nr; i++) { 599 char path[PATH_MAX]; 600 601 scnprintf(path, PATH_MAX, "%s/%d", procfs__mountpoint(), 602 threads->map[i].pid); 603 604 if (!stat(path, &st)) 605 return true; 606 } 607 608 return false; 609 } 610 611 static void process_evlist(struct evlist *evlist, unsigned int interval) 612 { 613 enum evlist_ctl_cmd cmd = EVLIST_CTL_CMD_UNSUPPORTED; 614 615 if (evlist__ctlfd_process(evlist, &cmd) > 0) { 616 switch (cmd) { 617 case EVLIST_CTL_CMD_ENABLE: 618 __fallthrough; 619 case EVLIST_CTL_CMD_DISABLE: 620 if (interval) 621 process_interval(); 622 break; 623 case EVLIST_CTL_CMD_SNAPSHOT: 624 case EVLIST_CTL_CMD_ACK: 625 case EVLIST_CTL_CMD_UNSUPPORTED: 626 case EVLIST_CTL_CMD_EVLIST: 627 case EVLIST_CTL_CMD_STOP: 628 case EVLIST_CTL_CMD_PING: 629 default: 630 break; 631 } 632 } 633 } 634 635 static void compute_tts(struct timespec *time_start, struct timespec *time_stop, 636 int *time_to_sleep) 637 { 638 int tts = *time_to_sleep; 639 struct timespec time_diff; 640 641 diff_timespec(&time_diff, time_stop, time_start); 642 643 tts -= time_diff.tv_sec * MSEC_PER_SEC + 644 time_diff.tv_nsec / NSEC_PER_MSEC; 645 646 if (tts < 0) 647 tts = 0; 648 649 *time_to_sleep = tts; 650 } 651 652 static int dispatch_events(bool forks, int timeout, int interval, int *times) 653 { 654 int child_exited = 0, status = 0; 655 int time_to_sleep, sleep_time; 656 struct timespec time_start, time_stop; 657 658 if (interval) 659 sleep_time = interval; 660 else if (timeout) 661 sleep_time = timeout; 662 else 663 sleep_time = 1000; 664 665 time_to_sleep = sleep_time; 666 667 while (!done) { 668 if (forks) 669 child_exited = waitpid(child_pid, &status, WNOHANG); 670 else 671 child_exited = !is_target_alive(&target, evsel_list->core.threads) ? 1 : 0; 672 673 if (child_exited) 674 break; 675 676 clock_gettime(CLOCK_MONOTONIC, &time_start); 677 if (!(evlist__poll(evsel_list, time_to_sleep) > 0)) { /* poll timeout or EINTR */ 678 if (timeout || handle_interval(interval, times)) 679 break; 680 time_to_sleep = sleep_time; 681 } else { /* fd revent */ 682 process_evlist(evsel_list, interval); 683 clock_gettime(CLOCK_MONOTONIC, &time_stop); 684 compute_tts(&time_start, &time_stop, &time_to_sleep); 685 } 686 } 687 688 return status; 689 } 690 691 enum counter_recovery { 692 COUNTER_SKIP, 693 COUNTER_RETRY, 694 COUNTER_FATAL, 695 }; 696 697 static enum counter_recovery stat_handle_error(struct evsel *counter) 698 { 699 char msg[BUFSIZ]; 700 /* 701 * PPC returns ENXIO for HW counters until 2.6.37 702 * (behavior changed with commit b0a873e). 703 */ 704 if (errno == EINVAL || errno == ENOSYS || 705 errno == ENOENT || errno == EOPNOTSUPP || 706 errno == ENXIO) { 707 if (verbose > 0) 708 ui__warning("%s event is not supported by the kernel.\n", 709 evsel__name(counter)); 710 counter->supported = false; 711 /* 712 * errored is a sticky flag that means one of the counter's 713 * cpu event had a problem and needs to be reexamined. 714 */ 715 counter->errored = true; 716 717 if ((evsel__leader(counter) != counter) || 718 !(counter->core.leader->nr_members > 1)) 719 return COUNTER_SKIP; 720 } else if (evsel__fallback(counter, errno, msg, sizeof(msg))) { 721 if (verbose > 0) 722 ui__warning("%s\n", msg); 723 return COUNTER_RETRY; 724 } else if (target__has_per_thread(&target) && 725 evsel_list->core.threads && 726 evsel_list->core.threads->err_thread != -1) { 727 /* 728 * For global --per-thread case, skip current 729 * error thread. 730 */ 731 if (!thread_map__remove(evsel_list->core.threads, 732 evsel_list->core.threads->err_thread)) { 733 evsel_list->core.threads->err_thread = -1; 734 return COUNTER_RETRY; 735 } 736 } 737 738 evsel__open_strerror(counter, &target, errno, msg, sizeof(msg)); 739 ui__error("%s\n", msg); 740 741 if (child_pid != -1) 742 kill(child_pid, SIGTERM); 743 return COUNTER_FATAL; 744 } 745 746 static int __run_perf_stat(int argc, const char **argv, int run_idx) 747 { 748 int interval = stat_config.interval; 749 int times = stat_config.times; 750 int timeout = stat_config.timeout; 751 char msg[BUFSIZ]; 752 unsigned long long t0, t1; 753 struct evsel *counter; 754 size_t l; 755 int status = 0; 756 const bool forks = (argc > 0); 757 bool is_pipe = STAT_RECORD ? perf_stat.data.is_pipe : false; 758 struct evlist_cpu_iterator evlist_cpu_itr; 759 struct affinity saved_affinity, *affinity = NULL; 760 int err; 761 bool second_pass = false; 762 763 if (forks) { 764 if (evlist__prepare_workload(evsel_list, &target, argv, is_pipe, workload_exec_failed_signal) < 0) { 765 perror("failed to prepare workload"); 766 return -1; 767 } 768 child_pid = evsel_list->workload.pid; 769 } 770 771 if (!cpu_map__is_dummy(evsel_list->core.user_requested_cpus)) { 772 if (affinity__setup(&saved_affinity) < 0) 773 return -1; 774 affinity = &saved_affinity; 775 } 776 777 evlist__for_each_entry(evsel_list, counter) { 778 counter->reset_group = false; 779 if (bpf_counter__load(counter, &target)) 780 return -1; 781 if (!evsel__is_bpf(counter)) 782 all_counters_use_bpf = false; 783 } 784 785 evlist__for_each_cpu(evlist_cpu_itr, evsel_list, affinity) { 786 counter = evlist_cpu_itr.evsel; 787 788 /* 789 * bperf calls evsel__open_per_cpu() in bperf__load(), so 790 * no need to call it again here. 791 */ 792 if (target.use_bpf) 793 break; 794 795 if (counter->reset_group || counter->errored) 796 continue; 797 if (evsel__is_bpf(counter)) 798 continue; 799 try_again: 800 if (create_perf_stat_counter(counter, &stat_config, &target, 801 evlist_cpu_itr.cpu_map_idx) < 0) { 802 803 /* 804 * Weak group failed. We cannot just undo this here 805 * because earlier CPUs might be in group mode, and the kernel 806 * doesn't support mixing group and non group reads. Defer 807 * it to later. 808 * Don't close here because we're in the wrong affinity. 809 */ 810 if ((errno == EINVAL || errno == EBADF) && 811 evsel__leader(counter) != counter && 812 counter->weak_group) { 813 evlist__reset_weak_group(evsel_list, counter, false); 814 assert(counter->reset_group); 815 second_pass = true; 816 continue; 817 } 818 819 switch (stat_handle_error(counter)) { 820 case COUNTER_FATAL: 821 return -1; 822 case COUNTER_RETRY: 823 goto try_again; 824 case COUNTER_SKIP: 825 continue; 826 default: 827 break; 828 } 829 830 } 831 counter->supported = true; 832 } 833 834 if (second_pass) { 835 /* 836 * Now redo all the weak group after closing them, 837 * and also close errored counters. 838 */ 839 840 /* First close errored or weak retry */ 841 evlist__for_each_cpu(evlist_cpu_itr, evsel_list, affinity) { 842 counter = evlist_cpu_itr.evsel; 843 844 if (!counter->reset_group && !counter->errored) 845 continue; 846 847 perf_evsel__close_cpu(&counter->core, evlist_cpu_itr.cpu_map_idx); 848 } 849 /* Now reopen weak */ 850 evlist__for_each_cpu(evlist_cpu_itr, evsel_list, affinity) { 851 counter = evlist_cpu_itr.evsel; 852 853 if (!counter->reset_group) 854 continue; 855 try_again_reset: 856 pr_debug2("reopening weak %s\n", evsel__name(counter)); 857 if (create_perf_stat_counter(counter, &stat_config, &target, 858 evlist_cpu_itr.cpu_map_idx) < 0) { 859 860 switch (stat_handle_error(counter)) { 861 case COUNTER_FATAL: 862 return -1; 863 case COUNTER_RETRY: 864 goto try_again_reset; 865 case COUNTER_SKIP: 866 continue; 867 default: 868 break; 869 } 870 } 871 counter->supported = true; 872 } 873 } 874 affinity__cleanup(affinity); 875 876 evlist__for_each_entry(evsel_list, counter) { 877 if (!counter->supported) { 878 perf_evsel__free_fd(&counter->core); 879 continue; 880 } 881 882 l = strlen(counter->unit); 883 if (l > stat_config.unit_width) 884 stat_config.unit_width = l; 885 886 if (evsel__should_store_id(counter) && 887 evsel__store_ids(counter, evsel_list)) 888 return -1; 889 } 890 891 if (evlist__apply_filters(evsel_list, &counter)) { 892 pr_err("failed to set filter \"%s\" on event %s with %d (%s)\n", 893 counter->filter, evsel__name(counter), errno, 894 str_error_r(errno, msg, sizeof(msg))); 895 return -1; 896 } 897 898 if (STAT_RECORD) { 899 int fd = perf_data__fd(&perf_stat.data); 900 901 if (is_pipe) { 902 err = perf_header__write_pipe(perf_data__fd(&perf_stat.data)); 903 } else { 904 err = perf_session__write_header(perf_stat.session, evsel_list, 905 fd, false); 906 } 907 908 if (err < 0) 909 return err; 910 911 err = perf_event__synthesize_stat_events(&stat_config, NULL, evsel_list, 912 process_synthesized_event, is_pipe); 913 if (err < 0) 914 return err; 915 } 916 917 if (stat_config.initial_delay) { 918 pr_info(EVLIST_DISABLED_MSG); 919 } else { 920 err = enable_counters(); 921 if (err) 922 return -1; 923 } 924 925 /* Exec the command, if any */ 926 if (forks) 927 evlist__start_workload(evsel_list); 928 929 if (stat_config.initial_delay > 0) { 930 usleep(stat_config.initial_delay * USEC_PER_MSEC); 931 err = enable_counters(); 932 if (err) 933 return -1; 934 935 pr_info(EVLIST_ENABLED_MSG); 936 } 937 938 t0 = rdclock(); 939 clock_gettime(CLOCK_MONOTONIC, &ref_time); 940 941 if (forks) { 942 if (interval || timeout || evlist__ctlfd_initialized(evsel_list)) 943 status = dispatch_events(forks, timeout, interval, ×); 944 if (child_pid != -1) { 945 if (timeout) 946 kill(child_pid, SIGTERM); 947 wait4(child_pid, &status, 0, &stat_config.ru_data); 948 } 949 950 if (workload_exec_errno) { 951 const char *emsg = str_error_r(workload_exec_errno, msg, sizeof(msg)); 952 pr_err("Workload failed: %s\n", emsg); 953 return -1; 954 } 955 956 if (WIFSIGNALED(status)) 957 psignal(WTERMSIG(status), argv[0]); 958 } else { 959 status = dispatch_events(forks, timeout, interval, ×); 960 } 961 962 disable_counters(); 963 964 t1 = rdclock(); 965 966 if (stat_config.walltime_run_table) 967 stat_config.walltime_run[run_idx] = t1 - t0; 968 969 if (interval && stat_config.summary) { 970 stat_config.interval = 0; 971 stat_config.stop_read_counter = true; 972 init_stats(&walltime_nsecs_stats); 973 update_stats(&walltime_nsecs_stats, t1 - t0); 974 975 evlist__copy_prev_raw_counts(evsel_list); 976 evlist__reset_prev_raw_counts(evsel_list); 977 evlist__reset_aggr_stats(evsel_list); 978 perf_stat__reset_shadow_per_stat(&rt_stat); 979 } else { 980 update_stats(&walltime_nsecs_stats, t1 - t0); 981 update_rusage_stats(&ru_stats, &stat_config.ru_data); 982 } 983 984 /* 985 * Closing a group leader splits the group, and as we only disable 986 * group leaders, results in remaining events becoming enabled. To 987 * avoid arbitrary skew, we must read all counters before closing any 988 * group leaders. 989 */ 990 if (read_counters(&(struct timespec) { .tv_nsec = t1-t0 }) == 0) 991 process_counters(); 992 993 /* 994 * We need to keep evsel_list alive, because it's processed 995 * later the evsel_list will be closed after. 996 */ 997 if (!STAT_RECORD) 998 evlist__close(evsel_list); 999 1000 return WEXITSTATUS(status); 1001 } 1002 1003 static int run_perf_stat(int argc, const char **argv, int run_idx) 1004 { 1005 int ret; 1006 1007 if (pre_cmd) { 1008 ret = system(pre_cmd); 1009 if (ret) 1010 return ret; 1011 } 1012 1013 if (sync_run) 1014 sync(); 1015 1016 ret = __run_perf_stat(argc, argv, run_idx); 1017 if (ret) 1018 return ret; 1019 1020 if (post_cmd) { 1021 ret = system(post_cmd); 1022 if (ret) 1023 return ret; 1024 } 1025 1026 return ret; 1027 } 1028 1029 static void print_counters(struct timespec *ts, int argc, const char **argv) 1030 { 1031 /* Do not print anything if we record to the pipe. */ 1032 if (STAT_RECORD && perf_stat.data.is_pipe) 1033 return; 1034 if (quiet) 1035 return; 1036 1037 evlist__print_counters(evsel_list, &stat_config, &target, ts, argc, argv); 1038 } 1039 1040 static volatile sig_atomic_t signr = -1; 1041 1042 static void skip_signal(int signo) 1043 { 1044 if ((child_pid == -1) || stat_config.interval) 1045 done = 1; 1046 1047 signr = signo; 1048 /* 1049 * render child_pid harmless 1050 * won't send SIGTERM to a random 1051 * process in case of race condition 1052 * and fast PID recycling 1053 */ 1054 child_pid = -1; 1055 } 1056 1057 static void sig_atexit(void) 1058 { 1059 sigset_t set, oset; 1060 1061 /* 1062 * avoid race condition with SIGCHLD handler 1063 * in skip_signal() which is modifying child_pid 1064 * goal is to avoid send SIGTERM to a random 1065 * process 1066 */ 1067 sigemptyset(&set); 1068 sigaddset(&set, SIGCHLD); 1069 sigprocmask(SIG_BLOCK, &set, &oset); 1070 1071 if (child_pid != -1) 1072 kill(child_pid, SIGTERM); 1073 1074 sigprocmask(SIG_SETMASK, &oset, NULL); 1075 1076 if (signr == -1) 1077 return; 1078 1079 signal(signr, SIG_DFL); 1080 kill(getpid(), signr); 1081 } 1082 1083 void perf_stat__set_big_num(int set) 1084 { 1085 stat_config.big_num = (set != 0); 1086 } 1087 1088 void perf_stat__set_no_csv_summary(int set) 1089 { 1090 stat_config.no_csv_summary = (set != 0); 1091 } 1092 1093 static int stat__set_big_num(const struct option *opt __maybe_unused, 1094 const char *s __maybe_unused, int unset) 1095 { 1096 big_num_opt = unset ? 0 : 1; 1097 perf_stat__set_big_num(!unset); 1098 return 0; 1099 } 1100 1101 static int enable_metric_only(const struct option *opt __maybe_unused, 1102 const char *s __maybe_unused, int unset) 1103 { 1104 force_metric_only = true; 1105 stat_config.metric_only = !unset; 1106 return 0; 1107 } 1108 1109 static int append_metric_groups(const struct option *opt __maybe_unused, 1110 const char *str, 1111 int unset __maybe_unused) 1112 { 1113 if (metrics) { 1114 char *tmp; 1115 1116 if (asprintf(&tmp, "%s,%s", metrics, str) < 0) 1117 return -ENOMEM; 1118 free(metrics); 1119 metrics = tmp; 1120 } else { 1121 metrics = strdup(str); 1122 if (!metrics) 1123 return -ENOMEM; 1124 } 1125 return 0; 1126 } 1127 1128 static int parse_control_option(const struct option *opt, 1129 const char *str, 1130 int unset __maybe_unused) 1131 { 1132 struct perf_stat_config *config = opt->value; 1133 1134 return evlist__parse_control(str, &config->ctl_fd, &config->ctl_fd_ack, &config->ctl_fd_close); 1135 } 1136 1137 static int parse_stat_cgroups(const struct option *opt, 1138 const char *str, int unset) 1139 { 1140 if (stat_config.cgroup_list) { 1141 pr_err("--cgroup and --for-each-cgroup cannot be used together\n"); 1142 return -1; 1143 } 1144 1145 return parse_cgroups(opt, str, unset); 1146 } 1147 1148 static int parse_hybrid_type(const struct option *opt, 1149 const char *str, 1150 int unset __maybe_unused) 1151 { 1152 struct evlist *evlist = *(struct evlist **)opt->value; 1153 1154 if (!list_empty(&evlist->core.entries)) { 1155 fprintf(stderr, "Must define cputype before events/metrics\n"); 1156 return -1; 1157 } 1158 1159 evlist->hybrid_pmu_name = perf_pmu__hybrid_type_to_pmu(str); 1160 if (!evlist->hybrid_pmu_name) { 1161 fprintf(stderr, "--cputype %s is not supported!\n", str); 1162 return -1; 1163 } 1164 1165 return 0; 1166 } 1167 1168 static struct option stat_options[] = { 1169 OPT_BOOLEAN('T', "transaction", &transaction_run, 1170 "hardware transaction statistics"), 1171 OPT_CALLBACK('e', "event", &evsel_list, "event", 1172 "event selector. use 'perf list' to list available events", 1173 parse_events_option), 1174 OPT_CALLBACK(0, "filter", &evsel_list, "filter", 1175 "event filter", parse_filter), 1176 OPT_BOOLEAN('i', "no-inherit", &stat_config.no_inherit, 1177 "child tasks do not inherit counters"), 1178 OPT_STRING('p', "pid", &target.pid, "pid", 1179 "stat events on existing process id"), 1180 OPT_STRING('t', "tid", &target.tid, "tid", 1181 "stat events on existing thread id"), 1182 #ifdef HAVE_BPF_SKEL 1183 OPT_STRING('b', "bpf-prog", &target.bpf_str, "bpf-prog-id", 1184 "stat events on existing bpf program id"), 1185 OPT_BOOLEAN(0, "bpf-counters", &target.use_bpf, 1186 "use bpf program to count events"), 1187 OPT_STRING(0, "bpf-attr-map", &target.attr_map, "attr-map-path", 1188 "path to perf_event_attr map"), 1189 #endif 1190 OPT_BOOLEAN('a', "all-cpus", &target.system_wide, 1191 "system-wide collection from all CPUs"), 1192 OPT_BOOLEAN(0, "scale", &stat_config.scale, 1193 "Use --no-scale to disable counter scaling for multiplexing"), 1194 OPT_INCR('v', "verbose", &verbose, 1195 "be more verbose (show counter open errors, etc)"), 1196 OPT_INTEGER('r', "repeat", &stat_config.run_count, 1197 "repeat command and print average + stddev (max: 100, forever: 0)"), 1198 OPT_BOOLEAN(0, "table", &stat_config.walltime_run_table, 1199 "display details about each run (only with -r option)"), 1200 OPT_BOOLEAN('n', "null", &stat_config.null_run, 1201 "null run - dont start any counters"), 1202 OPT_INCR('d', "detailed", &detailed_run, 1203 "detailed run - start a lot of events"), 1204 OPT_BOOLEAN('S', "sync", &sync_run, 1205 "call sync() before starting a run"), 1206 OPT_CALLBACK_NOOPT('B', "big-num", NULL, NULL, 1207 "print large numbers with thousands\' separators", 1208 stat__set_big_num), 1209 OPT_STRING('C', "cpu", &target.cpu_list, "cpu", 1210 "list of cpus to monitor in system-wide"), 1211 OPT_SET_UINT('A', "no-aggr", &stat_config.aggr_mode, 1212 "disable CPU count aggregation", AGGR_NONE), 1213 OPT_BOOLEAN(0, "no-merge", &stat_config.no_merge, "Do not merge identical named events"), 1214 OPT_BOOLEAN(0, "hybrid-merge", &stat_config.hybrid_merge, 1215 "Merge identical named hybrid events"), 1216 OPT_STRING('x', "field-separator", &stat_config.csv_sep, "separator", 1217 "print counts with custom separator"), 1218 OPT_BOOLEAN('j', "json-output", &stat_config.json_output, 1219 "print counts in JSON format"), 1220 OPT_CALLBACK('G', "cgroup", &evsel_list, "name", 1221 "monitor event in cgroup name only", parse_stat_cgroups), 1222 OPT_STRING(0, "for-each-cgroup", &stat_config.cgroup_list, "name", 1223 "expand events for each cgroup"), 1224 OPT_STRING('o', "output", &output_name, "file", "output file name"), 1225 OPT_BOOLEAN(0, "append", &append_file, "append to the output file"), 1226 OPT_INTEGER(0, "log-fd", &output_fd, 1227 "log output to fd, instead of stderr"), 1228 OPT_STRING(0, "pre", &pre_cmd, "command", 1229 "command to run prior to the measured command"), 1230 OPT_STRING(0, "post", &post_cmd, "command", 1231 "command to run after to the measured command"), 1232 OPT_UINTEGER('I', "interval-print", &stat_config.interval, 1233 "print counts at regular interval in ms " 1234 "(overhead is possible for values <= 100ms)"), 1235 OPT_INTEGER(0, "interval-count", &stat_config.times, 1236 "print counts for fixed number of times"), 1237 OPT_BOOLEAN(0, "interval-clear", &stat_config.interval_clear, 1238 "clear screen in between new interval"), 1239 OPT_UINTEGER(0, "timeout", &stat_config.timeout, 1240 "stop workload and print counts after a timeout period in ms (>= 10ms)"), 1241 OPT_SET_UINT(0, "per-socket", &stat_config.aggr_mode, 1242 "aggregate counts per processor socket", AGGR_SOCKET), 1243 OPT_SET_UINT(0, "per-die", &stat_config.aggr_mode, 1244 "aggregate counts per processor die", AGGR_DIE), 1245 OPT_SET_UINT(0, "per-core", &stat_config.aggr_mode, 1246 "aggregate counts per physical processor core", AGGR_CORE), 1247 OPT_SET_UINT(0, "per-thread", &stat_config.aggr_mode, 1248 "aggregate counts per thread", AGGR_THREAD), 1249 OPT_SET_UINT(0, "per-node", &stat_config.aggr_mode, 1250 "aggregate counts per numa node", AGGR_NODE), 1251 OPT_INTEGER('D', "delay", &stat_config.initial_delay, 1252 "ms to wait before starting measurement after program start (-1: start with events disabled)"), 1253 OPT_CALLBACK_NOOPT(0, "metric-only", &stat_config.metric_only, NULL, 1254 "Only print computed metrics. No raw values", enable_metric_only), 1255 OPT_BOOLEAN(0, "metric-no-group", &stat_config.metric_no_group, 1256 "don't group metric events, impacts multiplexing"), 1257 OPT_BOOLEAN(0, "metric-no-merge", &stat_config.metric_no_merge, 1258 "don't try to share events between metrics in a group"), 1259 OPT_BOOLEAN(0, "topdown", &topdown_run, 1260 "measure top-down statistics"), 1261 OPT_UINTEGER(0, "td-level", &stat_config.topdown_level, 1262 "Set the metrics level for the top-down statistics (0: max level)"), 1263 OPT_BOOLEAN(0, "smi-cost", &smi_cost, 1264 "measure SMI cost"), 1265 OPT_CALLBACK('M', "metrics", &evsel_list, "metric/metric group list", 1266 "monitor specified metrics or metric groups (separated by ,)", 1267 append_metric_groups), 1268 OPT_BOOLEAN_FLAG(0, "all-kernel", &stat_config.all_kernel, 1269 "Configure all used events to run in kernel space.", 1270 PARSE_OPT_EXCLUSIVE), 1271 OPT_BOOLEAN_FLAG(0, "all-user", &stat_config.all_user, 1272 "Configure all used events to run in user space.", 1273 PARSE_OPT_EXCLUSIVE), 1274 OPT_BOOLEAN(0, "percore-show-thread", &stat_config.percore_show_thread, 1275 "Use with 'percore' event qualifier to show the event " 1276 "counts of one hardware thread by sum up total hardware " 1277 "threads of same physical core"), 1278 OPT_BOOLEAN(0, "summary", &stat_config.summary, 1279 "print summary for interval mode"), 1280 OPT_BOOLEAN(0, "no-csv-summary", &stat_config.no_csv_summary, 1281 "don't print 'summary' for CSV summary output"), 1282 OPT_BOOLEAN(0, "quiet", &quiet, 1283 "don't print any output, messages or warnings (useful with record)"), 1284 OPT_CALLBACK(0, "cputype", &evsel_list, "hybrid cpu type", 1285 "Only enable events on applying cpu with this type " 1286 "for hybrid platform (e.g. core or atom)", 1287 parse_hybrid_type), 1288 #ifdef HAVE_LIBPFM 1289 OPT_CALLBACK(0, "pfm-events", &evsel_list, "event", 1290 "libpfm4 event selector. use 'perf list' to list available events", 1291 parse_libpfm_events_option), 1292 #endif 1293 OPT_CALLBACK(0, "control", &stat_config, "fd:ctl-fd[,ack-fd] or fifo:ctl-fifo[,ack-fifo]", 1294 "Listen on ctl-fd descriptor for command to control measurement ('enable': enable events, 'disable': disable events).\n" 1295 "\t\t\t Optionally send control command completion ('ack\\n') to ack-fd descriptor.\n" 1296 "\t\t\t Alternatively, ctl-fifo / ack-fifo will be opened and used as ctl-fd / ack-fd.", 1297 parse_control_option), 1298 OPT_CALLBACK_OPTARG(0, "iostat", &evsel_list, &stat_config, "default", 1299 "measure I/O performance metrics provided by arch/platform", 1300 iostat_parse), 1301 OPT_END() 1302 }; 1303 1304 static const char *const aggr_mode__string[] = { 1305 [AGGR_CORE] = "core", 1306 [AGGR_DIE] = "die", 1307 [AGGR_GLOBAL] = "global", 1308 [AGGR_NODE] = "node", 1309 [AGGR_NONE] = "none", 1310 [AGGR_SOCKET] = "socket", 1311 [AGGR_THREAD] = "thread", 1312 [AGGR_UNSET] = "unset", 1313 }; 1314 1315 static struct aggr_cpu_id perf_stat__get_socket(struct perf_stat_config *config __maybe_unused, 1316 struct perf_cpu cpu) 1317 { 1318 return aggr_cpu_id__socket(cpu, /*data=*/NULL); 1319 } 1320 1321 static struct aggr_cpu_id perf_stat__get_die(struct perf_stat_config *config __maybe_unused, 1322 struct perf_cpu cpu) 1323 { 1324 return aggr_cpu_id__die(cpu, /*data=*/NULL); 1325 } 1326 1327 static struct aggr_cpu_id perf_stat__get_core(struct perf_stat_config *config __maybe_unused, 1328 struct perf_cpu cpu) 1329 { 1330 return aggr_cpu_id__core(cpu, /*data=*/NULL); 1331 } 1332 1333 static struct aggr_cpu_id perf_stat__get_node(struct perf_stat_config *config __maybe_unused, 1334 struct perf_cpu cpu) 1335 { 1336 return aggr_cpu_id__node(cpu, /*data=*/NULL); 1337 } 1338 1339 static struct aggr_cpu_id perf_stat__get_global(struct perf_stat_config *config __maybe_unused, 1340 struct perf_cpu cpu) 1341 { 1342 return aggr_cpu_id__global(cpu, /*data=*/NULL); 1343 } 1344 1345 static struct aggr_cpu_id perf_stat__get_cpu(struct perf_stat_config *config __maybe_unused, 1346 struct perf_cpu cpu) 1347 { 1348 return aggr_cpu_id__cpu(cpu, /*data=*/NULL); 1349 } 1350 1351 static struct aggr_cpu_id perf_stat__get_aggr(struct perf_stat_config *config, 1352 aggr_get_id_t get_id, struct perf_cpu cpu) 1353 { 1354 struct aggr_cpu_id id; 1355 1356 /* per-process mode - should use global aggr mode */ 1357 if (cpu.cpu == -1) 1358 return get_id(config, cpu); 1359 1360 if (aggr_cpu_id__is_empty(&config->cpus_aggr_map->map[cpu.cpu])) 1361 config->cpus_aggr_map->map[cpu.cpu] = get_id(config, cpu); 1362 1363 id = config->cpus_aggr_map->map[cpu.cpu]; 1364 return id; 1365 } 1366 1367 static struct aggr_cpu_id perf_stat__get_socket_cached(struct perf_stat_config *config, 1368 struct perf_cpu cpu) 1369 { 1370 return perf_stat__get_aggr(config, perf_stat__get_socket, cpu); 1371 } 1372 1373 static struct aggr_cpu_id perf_stat__get_die_cached(struct perf_stat_config *config, 1374 struct perf_cpu cpu) 1375 { 1376 return perf_stat__get_aggr(config, perf_stat__get_die, cpu); 1377 } 1378 1379 static struct aggr_cpu_id perf_stat__get_core_cached(struct perf_stat_config *config, 1380 struct perf_cpu cpu) 1381 { 1382 return perf_stat__get_aggr(config, perf_stat__get_core, cpu); 1383 } 1384 1385 static struct aggr_cpu_id perf_stat__get_node_cached(struct perf_stat_config *config, 1386 struct perf_cpu cpu) 1387 { 1388 return perf_stat__get_aggr(config, perf_stat__get_node, cpu); 1389 } 1390 1391 static struct aggr_cpu_id perf_stat__get_global_cached(struct perf_stat_config *config, 1392 struct perf_cpu cpu) 1393 { 1394 return perf_stat__get_aggr(config, perf_stat__get_global, cpu); 1395 } 1396 1397 static struct aggr_cpu_id perf_stat__get_cpu_cached(struct perf_stat_config *config, 1398 struct perf_cpu cpu) 1399 { 1400 return perf_stat__get_aggr(config, perf_stat__get_cpu, cpu); 1401 } 1402 1403 static aggr_cpu_id_get_t aggr_mode__get_aggr(enum aggr_mode aggr_mode) 1404 { 1405 switch (aggr_mode) { 1406 case AGGR_SOCKET: 1407 return aggr_cpu_id__socket; 1408 case AGGR_DIE: 1409 return aggr_cpu_id__die; 1410 case AGGR_CORE: 1411 return aggr_cpu_id__core; 1412 case AGGR_NODE: 1413 return aggr_cpu_id__node; 1414 case AGGR_NONE: 1415 return aggr_cpu_id__cpu; 1416 case AGGR_GLOBAL: 1417 return aggr_cpu_id__global; 1418 case AGGR_THREAD: 1419 case AGGR_UNSET: 1420 case AGGR_MAX: 1421 default: 1422 return NULL; 1423 } 1424 } 1425 1426 static aggr_get_id_t aggr_mode__get_id(enum aggr_mode aggr_mode) 1427 { 1428 switch (aggr_mode) { 1429 case AGGR_SOCKET: 1430 return perf_stat__get_socket_cached; 1431 case AGGR_DIE: 1432 return perf_stat__get_die_cached; 1433 case AGGR_CORE: 1434 return perf_stat__get_core_cached; 1435 case AGGR_NODE: 1436 return perf_stat__get_node_cached; 1437 case AGGR_NONE: 1438 return perf_stat__get_cpu_cached; 1439 case AGGR_GLOBAL: 1440 return perf_stat__get_global_cached; 1441 case AGGR_THREAD: 1442 case AGGR_UNSET: 1443 case AGGR_MAX: 1444 default: 1445 return NULL; 1446 } 1447 } 1448 1449 static int perf_stat_init_aggr_mode(void) 1450 { 1451 int nr; 1452 aggr_cpu_id_get_t get_id = aggr_mode__get_aggr(stat_config.aggr_mode); 1453 1454 if (get_id) { 1455 bool needs_sort = stat_config.aggr_mode != AGGR_NONE; 1456 stat_config.aggr_map = cpu_aggr_map__new(evsel_list->core.user_requested_cpus, 1457 get_id, /*data=*/NULL, needs_sort); 1458 if (!stat_config.aggr_map) { 1459 pr_err("cannot build %s map", aggr_mode__string[stat_config.aggr_mode]); 1460 return -1; 1461 } 1462 stat_config.aggr_get_id = aggr_mode__get_id(stat_config.aggr_mode); 1463 } 1464 1465 if (stat_config.aggr_mode == AGGR_THREAD) { 1466 nr = perf_thread_map__nr(evsel_list->core.threads); 1467 stat_config.aggr_map = cpu_aggr_map__empty_new(nr); 1468 if (stat_config.aggr_map == NULL) 1469 return -ENOMEM; 1470 1471 for (int s = 0; s < nr; s++) { 1472 struct aggr_cpu_id id = aggr_cpu_id__empty(); 1473 1474 id.thread_idx = s; 1475 stat_config.aggr_map->map[s] = id; 1476 } 1477 return 0; 1478 } 1479 1480 /* 1481 * The evsel_list->cpus is the base we operate on, 1482 * taking the highest cpu number to be the size of 1483 * the aggregation translate cpumap. 1484 */ 1485 if (evsel_list->core.user_requested_cpus) 1486 nr = perf_cpu_map__max(evsel_list->core.user_requested_cpus).cpu; 1487 else 1488 nr = 0; 1489 stat_config.cpus_aggr_map = cpu_aggr_map__empty_new(nr + 1); 1490 return stat_config.cpus_aggr_map ? 0 : -ENOMEM; 1491 } 1492 1493 static void cpu_aggr_map__delete(struct cpu_aggr_map *map) 1494 { 1495 if (map) { 1496 WARN_ONCE(refcount_read(&map->refcnt) != 0, 1497 "cpu_aggr_map refcnt unbalanced\n"); 1498 free(map); 1499 } 1500 } 1501 1502 static void cpu_aggr_map__put(struct cpu_aggr_map *map) 1503 { 1504 if (map && refcount_dec_and_test(&map->refcnt)) 1505 cpu_aggr_map__delete(map); 1506 } 1507 1508 static void perf_stat__exit_aggr_mode(void) 1509 { 1510 cpu_aggr_map__put(stat_config.aggr_map); 1511 cpu_aggr_map__put(stat_config.cpus_aggr_map); 1512 stat_config.aggr_map = NULL; 1513 stat_config.cpus_aggr_map = NULL; 1514 } 1515 1516 static struct aggr_cpu_id perf_env__get_socket_aggr_by_cpu(struct perf_cpu cpu, void *data) 1517 { 1518 struct perf_env *env = data; 1519 struct aggr_cpu_id id = aggr_cpu_id__empty(); 1520 1521 if (cpu.cpu != -1) 1522 id.socket = env->cpu[cpu.cpu].socket_id; 1523 1524 return id; 1525 } 1526 1527 static struct aggr_cpu_id perf_env__get_die_aggr_by_cpu(struct perf_cpu cpu, void *data) 1528 { 1529 struct perf_env *env = data; 1530 struct aggr_cpu_id id = aggr_cpu_id__empty(); 1531 1532 if (cpu.cpu != -1) { 1533 /* 1534 * die_id is relative to socket, so start 1535 * with the socket ID and then add die to 1536 * make a unique ID. 1537 */ 1538 id.socket = env->cpu[cpu.cpu].socket_id; 1539 id.die = env->cpu[cpu.cpu].die_id; 1540 } 1541 1542 return id; 1543 } 1544 1545 static struct aggr_cpu_id perf_env__get_core_aggr_by_cpu(struct perf_cpu cpu, void *data) 1546 { 1547 struct perf_env *env = data; 1548 struct aggr_cpu_id id = aggr_cpu_id__empty(); 1549 1550 if (cpu.cpu != -1) { 1551 /* 1552 * core_id is relative to socket and die, 1553 * we need a global id. So we set 1554 * socket, die id and core id 1555 */ 1556 id.socket = env->cpu[cpu.cpu].socket_id; 1557 id.die = env->cpu[cpu.cpu].die_id; 1558 id.core = env->cpu[cpu.cpu].core_id; 1559 } 1560 1561 return id; 1562 } 1563 1564 static struct aggr_cpu_id perf_env__get_cpu_aggr_by_cpu(struct perf_cpu cpu, void *data) 1565 { 1566 struct perf_env *env = data; 1567 struct aggr_cpu_id id = aggr_cpu_id__empty(); 1568 1569 if (cpu.cpu != -1) { 1570 /* 1571 * core_id is relative to socket and die, 1572 * we need a global id. So we set 1573 * socket, die id and core id 1574 */ 1575 id.socket = env->cpu[cpu.cpu].socket_id; 1576 id.die = env->cpu[cpu.cpu].die_id; 1577 id.core = env->cpu[cpu.cpu].core_id; 1578 id.cpu = cpu; 1579 } 1580 1581 return id; 1582 } 1583 1584 static struct aggr_cpu_id perf_env__get_node_aggr_by_cpu(struct perf_cpu cpu, void *data) 1585 { 1586 struct aggr_cpu_id id = aggr_cpu_id__empty(); 1587 1588 id.node = perf_env__numa_node(data, cpu); 1589 return id; 1590 } 1591 1592 static struct aggr_cpu_id perf_env__get_global_aggr_by_cpu(struct perf_cpu cpu __maybe_unused, 1593 void *data __maybe_unused) 1594 { 1595 struct aggr_cpu_id id = aggr_cpu_id__empty(); 1596 1597 /* it always aggregates to the cpu 0 */ 1598 id.cpu = (struct perf_cpu){ .cpu = 0 }; 1599 return id; 1600 } 1601 1602 static struct aggr_cpu_id perf_stat__get_socket_file(struct perf_stat_config *config __maybe_unused, 1603 struct perf_cpu cpu) 1604 { 1605 return perf_env__get_socket_aggr_by_cpu(cpu, &perf_stat.session->header.env); 1606 } 1607 static struct aggr_cpu_id perf_stat__get_die_file(struct perf_stat_config *config __maybe_unused, 1608 struct perf_cpu cpu) 1609 { 1610 return perf_env__get_die_aggr_by_cpu(cpu, &perf_stat.session->header.env); 1611 } 1612 1613 static struct aggr_cpu_id perf_stat__get_core_file(struct perf_stat_config *config __maybe_unused, 1614 struct perf_cpu cpu) 1615 { 1616 return perf_env__get_core_aggr_by_cpu(cpu, &perf_stat.session->header.env); 1617 } 1618 1619 static struct aggr_cpu_id perf_stat__get_cpu_file(struct perf_stat_config *config __maybe_unused, 1620 struct perf_cpu cpu) 1621 { 1622 return perf_env__get_cpu_aggr_by_cpu(cpu, &perf_stat.session->header.env); 1623 } 1624 1625 static struct aggr_cpu_id perf_stat__get_node_file(struct perf_stat_config *config __maybe_unused, 1626 struct perf_cpu cpu) 1627 { 1628 return perf_env__get_node_aggr_by_cpu(cpu, &perf_stat.session->header.env); 1629 } 1630 1631 static struct aggr_cpu_id perf_stat__get_global_file(struct perf_stat_config *config __maybe_unused, 1632 struct perf_cpu cpu) 1633 { 1634 return perf_env__get_global_aggr_by_cpu(cpu, &perf_stat.session->header.env); 1635 } 1636 1637 static aggr_cpu_id_get_t aggr_mode__get_aggr_file(enum aggr_mode aggr_mode) 1638 { 1639 switch (aggr_mode) { 1640 case AGGR_SOCKET: 1641 return perf_env__get_socket_aggr_by_cpu; 1642 case AGGR_DIE: 1643 return perf_env__get_die_aggr_by_cpu; 1644 case AGGR_CORE: 1645 return perf_env__get_core_aggr_by_cpu; 1646 case AGGR_NODE: 1647 return perf_env__get_node_aggr_by_cpu; 1648 case AGGR_GLOBAL: 1649 return perf_env__get_global_aggr_by_cpu; 1650 case AGGR_NONE: 1651 return perf_env__get_cpu_aggr_by_cpu; 1652 case AGGR_THREAD: 1653 case AGGR_UNSET: 1654 case AGGR_MAX: 1655 default: 1656 return NULL; 1657 } 1658 } 1659 1660 static aggr_get_id_t aggr_mode__get_id_file(enum aggr_mode aggr_mode) 1661 { 1662 switch (aggr_mode) { 1663 case AGGR_SOCKET: 1664 return perf_stat__get_socket_file; 1665 case AGGR_DIE: 1666 return perf_stat__get_die_file; 1667 case AGGR_CORE: 1668 return perf_stat__get_core_file; 1669 case AGGR_NODE: 1670 return perf_stat__get_node_file; 1671 case AGGR_GLOBAL: 1672 return perf_stat__get_global_file; 1673 case AGGR_NONE: 1674 return perf_stat__get_cpu_file; 1675 case AGGR_THREAD: 1676 case AGGR_UNSET: 1677 case AGGR_MAX: 1678 default: 1679 return NULL; 1680 } 1681 } 1682 1683 static int perf_stat_init_aggr_mode_file(struct perf_stat *st) 1684 { 1685 struct perf_env *env = &st->session->header.env; 1686 aggr_cpu_id_get_t get_id = aggr_mode__get_aggr_file(stat_config.aggr_mode); 1687 bool needs_sort = stat_config.aggr_mode != AGGR_NONE; 1688 1689 if (stat_config.aggr_mode == AGGR_THREAD) { 1690 int nr = perf_thread_map__nr(evsel_list->core.threads); 1691 1692 stat_config.aggr_map = cpu_aggr_map__empty_new(nr); 1693 if (stat_config.aggr_map == NULL) 1694 return -ENOMEM; 1695 1696 for (int s = 0; s < nr; s++) { 1697 struct aggr_cpu_id id = aggr_cpu_id__empty(); 1698 1699 id.thread_idx = s; 1700 stat_config.aggr_map->map[s] = id; 1701 } 1702 return 0; 1703 } 1704 1705 if (!get_id) 1706 return 0; 1707 1708 stat_config.aggr_map = cpu_aggr_map__new(evsel_list->core.user_requested_cpus, 1709 get_id, env, needs_sort); 1710 if (!stat_config.aggr_map) { 1711 pr_err("cannot build %s map", aggr_mode__string[stat_config.aggr_mode]); 1712 return -1; 1713 } 1714 stat_config.aggr_get_id = aggr_mode__get_id_file(stat_config.aggr_mode); 1715 return 0; 1716 } 1717 1718 /* 1719 * Add default attributes, if there were no attributes specified or 1720 * if -d/--detailed, -d -d or -d -d -d is used: 1721 */ 1722 static int add_default_attributes(void) 1723 { 1724 int err; 1725 struct perf_event_attr default_attrs0[] = { 1726 1727 { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_TASK_CLOCK }, 1728 { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_CONTEXT_SWITCHES }, 1729 { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_CPU_MIGRATIONS }, 1730 { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_PAGE_FAULTS }, 1731 1732 { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_CPU_CYCLES }, 1733 }; 1734 struct perf_event_attr frontend_attrs[] = { 1735 { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_STALLED_CYCLES_FRONTEND }, 1736 }; 1737 struct perf_event_attr backend_attrs[] = { 1738 { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_STALLED_CYCLES_BACKEND }, 1739 }; 1740 struct perf_event_attr default_attrs1[] = { 1741 { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_INSTRUCTIONS }, 1742 { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_BRANCH_INSTRUCTIONS }, 1743 { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_BRANCH_MISSES }, 1744 1745 }; 1746 1747 /* 1748 * Detailed stats (-d), covering the L1 and last level data caches: 1749 */ 1750 struct perf_event_attr detailed_attrs[] = { 1751 1752 { .type = PERF_TYPE_HW_CACHE, 1753 .config = 1754 PERF_COUNT_HW_CACHE_L1D << 0 | 1755 (PERF_COUNT_HW_CACHE_OP_READ << 8) | 1756 (PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16) }, 1757 1758 { .type = PERF_TYPE_HW_CACHE, 1759 .config = 1760 PERF_COUNT_HW_CACHE_L1D << 0 | 1761 (PERF_COUNT_HW_CACHE_OP_READ << 8) | 1762 (PERF_COUNT_HW_CACHE_RESULT_MISS << 16) }, 1763 1764 { .type = PERF_TYPE_HW_CACHE, 1765 .config = 1766 PERF_COUNT_HW_CACHE_LL << 0 | 1767 (PERF_COUNT_HW_CACHE_OP_READ << 8) | 1768 (PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16) }, 1769 1770 { .type = PERF_TYPE_HW_CACHE, 1771 .config = 1772 PERF_COUNT_HW_CACHE_LL << 0 | 1773 (PERF_COUNT_HW_CACHE_OP_READ << 8) | 1774 (PERF_COUNT_HW_CACHE_RESULT_MISS << 16) }, 1775 }; 1776 1777 /* 1778 * Very detailed stats (-d -d), covering the instruction cache and the TLB caches: 1779 */ 1780 struct perf_event_attr very_detailed_attrs[] = { 1781 1782 { .type = PERF_TYPE_HW_CACHE, 1783 .config = 1784 PERF_COUNT_HW_CACHE_L1I << 0 | 1785 (PERF_COUNT_HW_CACHE_OP_READ << 8) | 1786 (PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16) }, 1787 1788 { .type = PERF_TYPE_HW_CACHE, 1789 .config = 1790 PERF_COUNT_HW_CACHE_L1I << 0 | 1791 (PERF_COUNT_HW_CACHE_OP_READ << 8) | 1792 (PERF_COUNT_HW_CACHE_RESULT_MISS << 16) }, 1793 1794 { .type = PERF_TYPE_HW_CACHE, 1795 .config = 1796 PERF_COUNT_HW_CACHE_DTLB << 0 | 1797 (PERF_COUNT_HW_CACHE_OP_READ << 8) | 1798 (PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16) }, 1799 1800 { .type = PERF_TYPE_HW_CACHE, 1801 .config = 1802 PERF_COUNT_HW_CACHE_DTLB << 0 | 1803 (PERF_COUNT_HW_CACHE_OP_READ << 8) | 1804 (PERF_COUNT_HW_CACHE_RESULT_MISS << 16) }, 1805 1806 { .type = PERF_TYPE_HW_CACHE, 1807 .config = 1808 PERF_COUNT_HW_CACHE_ITLB << 0 | 1809 (PERF_COUNT_HW_CACHE_OP_READ << 8) | 1810 (PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16) }, 1811 1812 { .type = PERF_TYPE_HW_CACHE, 1813 .config = 1814 PERF_COUNT_HW_CACHE_ITLB << 0 | 1815 (PERF_COUNT_HW_CACHE_OP_READ << 8) | 1816 (PERF_COUNT_HW_CACHE_RESULT_MISS << 16) }, 1817 1818 }; 1819 1820 /* 1821 * Very, very detailed stats (-d -d -d), adding prefetch events: 1822 */ 1823 struct perf_event_attr very_very_detailed_attrs[] = { 1824 1825 { .type = PERF_TYPE_HW_CACHE, 1826 .config = 1827 PERF_COUNT_HW_CACHE_L1D << 0 | 1828 (PERF_COUNT_HW_CACHE_OP_PREFETCH << 8) | 1829 (PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16) }, 1830 1831 { .type = PERF_TYPE_HW_CACHE, 1832 .config = 1833 PERF_COUNT_HW_CACHE_L1D << 0 | 1834 (PERF_COUNT_HW_CACHE_OP_PREFETCH << 8) | 1835 (PERF_COUNT_HW_CACHE_RESULT_MISS << 16) }, 1836 }; 1837 1838 struct perf_event_attr default_null_attrs[] = {}; 1839 1840 /* Set attrs if no event is selected and !null_run: */ 1841 if (stat_config.null_run) 1842 return 0; 1843 1844 if (transaction_run) { 1845 struct parse_events_error errinfo; 1846 /* Handle -T as -M transaction. Once platform specific metrics 1847 * support has been added to the json files, all architectures 1848 * will use this approach. To determine transaction support 1849 * on an architecture test for such a metric name. 1850 */ 1851 if (metricgroup__has_metric("transaction")) { 1852 return metricgroup__parse_groups(evsel_list, "transaction", 1853 stat_config.metric_no_group, 1854 stat_config.metric_no_merge, 1855 stat_config.user_requested_cpu_list, 1856 stat_config.system_wide, 1857 &stat_config.metric_events); 1858 } 1859 1860 parse_events_error__init(&errinfo); 1861 if (pmu_have_event("cpu", "cycles-ct") && 1862 pmu_have_event("cpu", "el-start")) 1863 err = parse_events(evsel_list, transaction_attrs, 1864 &errinfo); 1865 else 1866 err = parse_events(evsel_list, 1867 transaction_limited_attrs, 1868 &errinfo); 1869 if (err) { 1870 fprintf(stderr, "Cannot set up transaction events\n"); 1871 parse_events_error__print(&errinfo, transaction_attrs); 1872 } 1873 parse_events_error__exit(&errinfo); 1874 return err ? -1 : 0; 1875 } 1876 1877 if (smi_cost) { 1878 struct parse_events_error errinfo; 1879 int smi; 1880 1881 if (sysfs__read_int(FREEZE_ON_SMI_PATH, &smi) < 0) { 1882 fprintf(stderr, "freeze_on_smi is not supported.\n"); 1883 return -1; 1884 } 1885 1886 if (!smi) { 1887 if (sysfs__write_int(FREEZE_ON_SMI_PATH, 1) < 0) { 1888 fprintf(stderr, "Failed to set freeze_on_smi.\n"); 1889 return -1; 1890 } 1891 smi_reset = true; 1892 } 1893 1894 if (!pmu_have_event("msr", "aperf") || 1895 !pmu_have_event("msr", "smi")) { 1896 fprintf(stderr, "To measure SMI cost, it needs " 1897 "msr/aperf/, msr/smi/ and cpu/cycles/ support\n"); 1898 return -1; 1899 } 1900 if (!force_metric_only) 1901 stat_config.metric_only = true; 1902 1903 parse_events_error__init(&errinfo); 1904 err = parse_events(evsel_list, smi_cost_attrs, &errinfo); 1905 if (err) { 1906 parse_events_error__print(&errinfo, smi_cost_attrs); 1907 fprintf(stderr, "Cannot set up SMI cost events\n"); 1908 } 1909 parse_events_error__exit(&errinfo); 1910 return err ? -1 : 0; 1911 } 1912 1913 if (topdown_run) { 1914 const char **metric_attrs = topdown_metric_attrs; 1915 unsigned int max_level = 1; 1916 char *str = NULL; 1917 bool warn = false; 1918 const char *pmu_name = arch_get_topdown_pmu_name(evsel_list, true); 1919 1920 if (!force_metric_only) 1921 stat_config.metric_only = true; 1922 1923 if (pmu_have_event(pmu_name, topdown_metric_L2_attrs[5])) { 1924 metric_attrs = topdown_metric_L2_attrs; 1925 max_level = 2; 1926 } 1927 1928 if (stat_config.topdown_level > max_level) { 1929 pr_err("Invalid top-down metrics level. The max level is %u.\n", max_level); 1930 return -1; 1931 } else if (!stat_config.topdown_level) 1932 stat_config.topdown_level = max_level; 1933 1934 if (topdown_filter_events(metric_attrs, &str, 1, pmu_name) < 0) { 1935 pr_err("Out of memory\n"); 1936 return -1; 1937 } 1938 1939 if (metric_attrs[0] && str) { 1940 if (!stat_config.interval && !stat_config.metric_only) { 1941 fprintf(stat_config.output, 1942 "Topdown accuracy may decrease when measuring long periods.\n" 1943 "Please print the result regularly, e.g. -I1000\n"); 1944 } 1945 goto setup_metrics; 1946 } 1947 1948 zfree(&str); 1949 1950 if (stat_config.aggr_mode != AGGR_GLOBAL && 1951 stat_config.aggr_mode != AGGR_CORE) { 1952 pr_err("top down event configuration requires --per-core mode\n"); 1953 return -1; 1954 } 1955 stat_config.aggr_mode = AGGR_CORE; 1956 if (nr_cgroups || !target__has_cpu(&target)) { 1957 pr_err("top down event configuration requires system-wide mode (-a)\n"); 1958 return -1; 1959 } 1960 1961 if (topdown_filter_events(topdown_attrs, &str, 1962 arch_topdown_check_group(&warn), 1963 pmu_name) < 0) { 1964 pr_err("Out of memory\n"); 1965 return -1; 1966 } 1967 1968 if (topdown_attrs[0] && str) { 1969 struct parse_events_error errinfo; 1970 if (warn) 1971 arch_topdown_group_warn(); 1972 setup_metrics: 1973 parse_events_error__init(&errinfo); 1974 err = parse_events(evsel_list, str, &errinfo); 1975 if (err) { 1976 fprintf(stderr, 1977 "Cannot set up top down events %s: %d\n", 1978 str, err); 1979 parse_events_error__print(&errinfo, str); 1980 parse_events_error__exit(&errinfo); 1981 free(str); 1982 return -1; 1983 } 1984 parse_events_error__exit(&errinfo); 1985 } else { 1986 fprintf(stderr, "System does not support topdown\n"); 1987 return -1; 1988 } 1989 free(str); 1990 } 1991 1992 if (!stat_config.topdown_level) 1993 stat_config.topdown_level = TOPDOWN_MAX_LEVEL; 1994 1995 if (!evsel_list->core.nr_entries) { 1996 if (target__has_cpu(&target)) 1997 default_attrs0[0].config = PERF_COUNT_SW_CPU_CLOCK; 1998 1999 if (evlist__add_default_attrs(evsel_list, default_attrs0) < 0) 2000 return -1; 2001 if (pmu_have_event("cpu", "stalled-cycles-frontend")) { 2002 if (evlist__add_default_attrs(evsel_list, frontend_attrs) < 0) 2003 return -1; 2004 } 2005 if (pmu_have_event("cpu", "stalled-cycles-backend")) { 2006 if (evlist__add_default_attrs(evsel_list, backend_attrs) < 0) 2007 return -1; 2008 } 2009 if (evlist__add_default_attrs(evsel_list, default_attrs1) < 0) 2010 return -1; 2011 /* Platform specific attrs */ 2012 if (evlist__add_default_attrs(evsel_list, default_null_attrs) < 0) 2013 return -1; 2014 } 2015 2016 /* Detailed events get appended to the event list: */ 2017 2018 if (detailed_run < 1) 2019 return 0; 2020 2021 /* Append detailed run extra attributes: */ 2022 if (evlist__add_default_attrs(evsel_list, detailed_attrs) < 0) 2023 return -1; 2024 2025 if (detailed_run < 2) 2026 return 0; 2027 2028 /* Append very detailed run extra attributes: */ 2029 if (evlist__add_default_attrs(evsel_list, very_detailed_attrs) < 0) 2030 return -1; 2031 2032 if (detailed_run < 3) 2033 return 0; 2034 2035 /* Append very, very detailed run extra attributes: */ 2036 return evlist__add_default_attrs(evsel_list, very_very_detailed_attrs); 2037 } 2038 2039 static const char * const stat_record_usage[] = { 2040 "perf stat record [<options>]", 2041 NULL, 2042 }; 2043 2044 static void init_features(struct perf_session *session) 2045 { 2046 int feat; 2047 2048 for (feat = HEADER_FIRST_FEATURE; feat < HEADER_LAST_FEATURE; feat++) 2049 perf_header__set_feat(&session->header, feat); 2050 2051 perf_header__clear_feat(&session->header, HEADER_DIR_FORMAT); 2052 perf_header__clear_feat(&session->header, HEADER_BUILD_ID); 2053 perf_header__clear_feat(&session->header, HEADER_TRACING_DATA); 2054 perf_header__clear_feat(&session->header, HEADER_BRANCH_STACK); 2055 perf_header__clear_feat(&session->header, HEADER_AUXTRACE); 2056 } 2057 2058 static int __cmd_record(int argc, const char **argv) 2059 { 2060 struct perf_session *session; 2061 struct perf_data *data = &perf_stat.data; 2062 2063 argc = parse_options(argc, argv, stat_options, stat_record_usage, 2064 PARSE_OPT_STOP_AT_NON_OPTION); 2065 2066 if (output_name) 2067 data->path = output_name; 2068 2069 if (stat_config.run_count != 1 || forever) { 2070 pr_err("Cannot use -r option with perf stat record.\n"); 2071 return -1; 2072 } 2073 2074 session = perf_session__new(data, NULL); 2075 if (IS_ERR(session)) { 2076 pr_err("Perf session creation failed\n"); 2077 return PTR_ERR(session); 2078 } 2079 2080 init_features(session); 2081 2082 session->evlist = evsel_list; 2083 perf_stat.session = session; 2084 perf_stat.record = true; 2085 return argc; 2086 } 2087 2088 static int process_stat_round_event(struct perf_session *session, 2089 union perf_event *event) 2090 { 2091 struct perf_record_stat_round *stat_round = &event->stat_round; 2092 struct timespec tsh, *ts = NULL; 2093 const char **argv = session->header.env.cmdline_argv; 2094 int argc = session->header.env.nr_cmdline; 2095 2096 process_counters(); 2097 2098 if (stat_round->type == PERF_STAT_ROUND_TYPE__FINAL) 2099 update_stats(&walltime_nsecs_stats, stat_round->time); 2100 2101 if (stat_config.interval && stat_round->time) { 2102 tsh.tv_sec = stat_round->time / NSEC_PER_SEC; 2103 tsh.tv_nsec = stat_round->time % NSEC_PER_SEC; 2104 ts = &tsh; 2105 } 2106 2107 print_counters(ts, argc, argv); 2108 return 0; 2109 } 2110 2111 static 2112 int process_stat_config_event(struct perf_session *session, 2113 union perf_event *event) 2114 { 2115 struct perf_tool *tool = session->tool; 2116 struct perf_stat *st = container_of(tool, struct perf_stat, tool); 2117 2118 perf_event__read_stat_config(&stat_config, &event->stat_config); 2119 2120 if (perf_cpu_map__empty(st->cpus)) { 2121 if (st->aggr_mode != AGGR_UNSET) 2122 pr_warning("warning: processing task data, aggregation mode not set\n"); 2123 } else if (st->aggr_mode != AGGR_UNSET) { 2124 stat_config.aggr_mode = st->aggr_mode; 2125 } 2126 2127 if (perf_stat.data.is_pipe) 2128 perf_stat_init_aggr_mode(); 2129 else 2130 perf_stat_init_aggr_mode_file(st); 2131 2132 if (stat_config.aggr_map) { 2133 int nr_aggr = stat_config.aggr_map->nr; 2134 2135 if (evlist__alloc_aggr_stats(session->evlist, nr_aggr) < 0) { 2136 pr_err("cannot allocate aggr counts\n"); 2137 return -1; 2138 } 2139 } 2140 return 0; 2141 } 2142 2143 static int set_maps(struct perf_stat *st) 2144 { 2145 if (!st->cpus || !st->threads) 2146 return 0; 2147 2148 if (WARN_ONCE(st->maps_allocated, "stats double allocation\n")) 2149 return -EINVAL; 2150 2151 perf_evlist__set_maps(&evsel_list->core, st->cpus, st->threads); 2152 2153 if (evlist__alloc_stats(&stat_config, evsel_list, /*alloc_raw=*/true)) 2154 return -ENOMEM; 2155 2156 st->maps_allocated = true; 2157 return 0; 2158 } 2159 2160 static 2161 int process_thread_map_event(struct perf_session *session, 2162 union perf_event *event) 2163 { 2164 struct perf_tool *tool = session->tool; 2165 struct perf_stat *st = container_of(tool, struct perf_stat, tool); 2166 2167 if (st->threads) { 2168 pr_warning("Extra thread map event, ignoring.\n"); 2169 return 0; 2170 } 2171 2172 st->threads = thread_map__new_event(&event->thread_map); 2173 if (!st->threads) 2174 return -ENOMEM; 2175 2176 return set_maps(st); 2177 } 2178 2179 static 2180 int process_cpu_map_event(struct perf_session *session, 2181 union perf_event *event) 2182 { 2183 struct perf_tool *tool = session->tool; 2184 struct perf_stat *st = container_of(tool, struct perf_stat, tool); 2185 struct perf_cpu_map *cpus; 2186 2187 if (st->cpus) { 2188 pr_warning("Extra cpu map event, ignoring.\n"); 2189 return 0; 2190 } 2191 2192 cpus = cpu_map__new_data(&event->cpu_map.data); 2193 if (!cpus) 2194 return -ENOMEM; 2195 2196 st->cpus = cpus; 2197 return set_maps(st); 2198 } 2199 2200 static const char * const stat_report_usage[] = { 2201 "perf stat report [<options>]", 2202 NULL, 2203 }; 2204 2205 static struct perf_stat perf_stat = { 2206 .tool = { 2207 .attr = perf_event__process_attr, 2208 .event_update = perf_event__process_event_update, 2209 .thread_map = process_thread_map_event, 2210 .cpu_map = process_cpu_map_event, 2211 .stat_config = process_stat_config_event, 2212 .stat = perf_event__process_stat_event, 2213 .stat_round = process_stat_round_event, 2214 }, 2215 .aggr_mode = AGGR_UNSET, 2216 }; 2217 2218 static int __cmd_report(int argc, const char **argv) 2219 { 2220 struct perf_session *session; 2221 const struct option options[] = { 2222 OPT_STRING('i', "input", &input_name, "file", "input file name"), 2223 OPT_SET_UINT(0, "per-socket", &perf_stat.aggr_mode, 2224 "aggregate counts per processor socket", AGGR_SOCKET), 2225 OPT_SET_UINT(0, "per-die", &perf_stat.aggr_mode, 2226 "aggregate counts per processor die", AGGR_DIE), 2227 OPT_SET_UINT(0, "per-core", &perf_stat.aggr_mode, 2228 "aggregate counts per physical processor core", AGGR_CORE), 2229 OPT_SET_UINT(0, "per-node", &perf_stat.aggr_mode, 2230 "aggregate counts per numa node", AGGR_NODE), 2231 OPT_SET_UINT('A', "no-aggr", &perf_stat.aggr_mode, 2232 "disable CPU count aggregation", AGGR_NONE), 2233 OPT_END() 2234 }; 2235 struct stat st; 2236 int ret; 2237 2238 argc = parse_options(argc, argv, options, stat_report_usage, 0); 2239 2240 if (!input_name || !strlen(input_name)) { 2241 if (!fstat(STDIN_FILENO, &st) && S_ISFIFO(st.st_mode)) 2242 input_name = "-"; 2243 else 2244 input_name = "perf.data"; 2245 } 2246 2247 perf_stat__init_shadow_stats(); 2248 2249 perf_stat.data.path = input_name; 2250 perf_stat.data.mode = PERF_DATA_MODE_READ; 2251 2252 session = perf_session__new(&perf_stat.data, &perf_stat.tool); 2253 if (IS_ERR(session)) 2254 return PTR_ERR(session); 2255 2256 perf_stat.session = session; 2257 stat_config.output = stderr; 2258 evsel_list = session->evlist; 2259 2260 ret = perf_session__process_events(session); 2261 if (ret) 2262 return ret; 2263 2264 perf_session__delete(session); 2265 return 0; 2266 } 2267 2268 static void setup_system_wide(int forks) 2269 { 2270 /* 2271 * Make system wide (-a) the default target if 2272 * no target was specified and one of following 2273 * conditions is met: 2274 * 2275 * - there's no workload specified 2276 * - there is workload specified but all requested 2277 * events are system wide events 2278 */ 2279 if (!target__none(&target)) 2280 return; 2281 2282 if (!forks) 2283 target.system_wide = true; 2284 else { 2285 struct evsel *counter; 2286 2287 evlist__for_each_entry(evsel_list, counter) { 2288 if (!counter->core.requires_cpu && 2289 strcmp(counter->name, "duration_time")) { 2290 return; 2291 } 2292 } 2293 2294 if (evsel_list->core.nr_entries) 2295 target.system_wide = true; 2296 } 2297 } 2298 2299 int cmd_stat(int argc, const char **argv) 2300 { 2301 const char * const stat_usage[] = { 2302 "perf stat [<options>] [<command>]", 2303 NULL 2304 }; 2305 int status = -EINVAL, run_idx, err; 2306 const char *mode; 2307 FILE *output = stderr; 2308 unsigned int interval, timeout; 2309 const char * const stat_subcommands[] = { "record", "report" }; 2310 char errbuf[BUFSIZ]; 2311 2312 setlocale(LC_ALL, ""); 2313 2314 evsel_list = evlist__new(); 2315 if (evsel_list == NULL) 2316 return -ENOMEM; 2317 2318 parse_events__shrink_config_terms(); 2319 2320 /* String-parsing callback-based options would segfault when negated */ 2321 set_option_flag(stat_options, 'e', "event", PARSE_OPT_NONEG); 2322 set_option_flag(stat_options, 'M', "metrics", PARSE_OPT_NONEG); 2323 set_option_flag(stat_options, 'G', "cgroup", PARSE_OPT_NONEG); 2324 2325 argc = parse_options_subcommand(argc, argv, stat_options, stat_subcommands, 2326 (const char **) stat_usage, 2327 PARSE_OPT_STOP_AT_NON_OPTION); 2328 2329 if (stat_config.csv_sep) { 2330 stat_config.csv_output = true; 2331 if (!strcmp(stat_config.csv_sep, "\\t")) 2332 stat_config.csv_sep = "\t"; 2333 } else 2334 stat_config.csv_sep = DEFAULT_SEPARATOR; 2335 2336 if (argc && strlen(argv[0]) > 2 && strstarts("record", argv[0])) { 2337 argc = __cmd_record(argc, argv); 2338 if (argc < 0) 2339 return -1; 2340 } else if (argc && strlen(argv[0]) > 2 && strstarts("report", argv[0])) 2341 return __cmd_report(argc, argv); 2342 2343 interval = stat_config.interval; 2344 timeout = stat_config.timeout; 2345 2346 /* 2347 * For record command the -o is already taken care of. 2348 */ 2349 if (!STAT_RECORD && output_name && strcmp(output_name, "-")) 2350 output = NULL; 2351 2352 if (output_name && output_fd) { 2353 fprintf(stderr, "cannot use both --output and --log-fd\n"); 2354 parse_options_usage(stat_usage, stat_options, "o", 1); 2355 parse_options_usage(NULL, stat_options, "log-fd", 0); 2356 goto out; 2357 } 2358 2359 if (stat_config.metric_only && stat_config.aggr_mode == AGGR_THREAD) { 2360 fprintf(stderr, "--metric-only is not supported with --per-thread\n"); 2361 goto out; 2362 } 2363 2364 if (stat_config.metric_only && stat_config.run_count > 1) { 2365 fprintf(stderr, "--metric-only is not supported with -r\n"); 2366 goto out; 2367 } 2368 2369 if (stat_config.walltime_run_table && stat_config.run_count <= 1) { 2370 fprintf(stderr, "--table is only supported with -r\n"); 2371 parse_options_usage(stat_usage, stat_options, "r", 1); 2372 parse_options_usage(NULL, stat_options, "table", 0); 2373 goto out; 2374 } 2375 2376 if (output_fd < 0) { 2377 fprintf(stderr, "argument to --log-fd must be a > 0\n"); 2378 parse_options_usage(stat_usage, stat_options, "log-fd", 0); 2379 goto out; 2380 } 2381 2382 if (!output && !quiet) { 2383 struct timespec tm; 2384 mode = append_file ? "a" : "w"; 2385 2386 output = fopen(output_name, mode); 2387 if (!output) { 2388 perror("failed to create output file"); 2389 return -1; 2390 } 2391 clock_gettime(CLOCK_REALTIME, &tm); 2392 fprintf(output, "# started on %s\n", ctime(&tm.tv_sec)); 2393 } else if (output_fd > 0) { 2394 mode = append_file ? "a" : "w"; 2395 output = fdopen(output_fd, mode); 2396 if (!output) { 2397 perror("Failed opening logfd"); 2398 return -errno; 2399 } 2400 } 2401 2402 if (stat_config.interval_clear && !isatty(fileno(output))) { 2403 fprintf(stderr, "--interval-clear does not work with output\n"); 2404 parse_options_usage(stat_usage, stat_options, "o", 1); 2405 parse_options_usage(NULL, stat_options, "log-fd", 0); 2406 parse_options_usage(NULL, stat_options, "interval-clear", 0); 2407 return -1; 2408 } 2409 2410 stat_config.output = output; 2411 2412 /* 2413 * let the spreadsheet do the pretty-printing 2414 */ 2415 if (stat_config.csv_output) { 2416 /* User explicitly passed -B? */ 2417 if (big_num_opt == 1) { 2418 fprintf(stderr, "-B option not supported with -x\n"); 2419 parse_options_usage(stat_usage, stat_options, "B", 1); 2420 parse_options_usage(NULL, stat_options, "x", 1); 2421 goto out; 2422 } else /* Nope, so disable big number formatting */ 2423 stat_config.big_num = false; 2424 } else if (big_num_opt == 0) /* User passed --no-big-num */ 2425 stat_config.big_num = false; 2426 2427 err = target__validate(&target); 2428 if (err) { 2429 target__strerror(&target, err, errbuf, BUFSIZ); 2430 pr_warning("%s\n", errbuf); 2431 } 2432 2433 setup_system_wide(argc); 2434 2435 /* 2436 * Display user/system times only for single 2437 * run and when there's specified tracee. 2438 */ 2439 if ((stat_config.run_count == 1) && target__none(&target)) 2440 stat_config.ru_display = true; 2441 2442 if (stat_config.run_count < 0) { 2443 pr_err("Run count must be a positive number\n"); 2444 parse_options_usage(stat_usage, stat_options, "r", 1); 2445 goto out; 2446 } else if (stat_config.run_count == 0) { 2447 forever = true; 2448 stat_config.run_count = 1; 2449 } 2450 2451 if (stat_config.walltime_run_table) { 2452 stat_config.walltime_run = zalloc(stat_config.run_count * sizeof(stat_config.walltime_run[0])); 2453 if (!stat_config.walltime_run) { 2454 pr_err("failed to setup -r option"); 2455 goto out; 2456 } 2457 } 2458 2459 if ((stat_config.aggr_mode == AGGR_THREAD) && 2460 !target__has_task(&target)) { 2461 if (!target.system_wide || target.cpu_list) { 2462 fprintf(stderr, "The --per-thread option is only " 2463 "available when monitoring via -p -t -a " 2464 "options or only --per-thread.\n"); 2465 parse_options_usage(NULL, stat_options, "p", 1); 2466 parse_options_usage(NULL, stat_options, "t", 1); 2467 goto out; 2468 } 2469 } 2470 2471 /* 2472 * no_aggr, cgroup are for system-wide only 2473 * --per-thread is aggregated per thread, we dont mix it with cpu mode 2474 */ 2475 if (((stat_config.aggr_mode != AGGR_GLOBAL && 2476 stat_config.aggr_mode != AGGR_THREAD) || 2477 (nr_cgroups || stat_config.cgroup_list)) && 2478 !target__has_cpu(&target)) { 2479 fprintf(stderr, "both cgroup and no-aggregation " 2480 "modes only available in system-wide mode\n"); 2481 2482 parse_options_usage(stat_usage, stat_options, "G", 1); 2483 parse_options_usage(NULL, stat_options, "A", 1); 2484 parse_options_usage(NULL, stat_options, "a", 1); 2485 parse_options_usage(NULL, stat_options, "for-each-cgroup", 0); 2486 goto out; 2487 } 2488 2489 if (stat_config.iostat_run) { 2490 status = iostat_prepare(evsel_list, &stat_config); 2491 if (status) 2492 goto out; 2493 if (iostat_mode == IOSTAT_LIST) { 2494 iostat_list(evsel_list, &stat_config); 2495 goto out; 2496 } else if (verbose > 0) 2497 iostat_list(evsel_list, &stat_config); 2498 if (iostat_mode == IOSTAT_RUN && !target__has_cpu(&target)) 2499 target.system_wide = true; 2500 } 2501 2502 if ((stat_config.aggr_mode == AGGR_THREAD) && (target.system_wide)) 2503 target.per_thread = true; 2504 2505 stat_config.system_wide = target.system_wide; 2506 if (target.cpu_list) { 2507 stat_config.user_requested_cpu_list = strdup(target.cpu_list); 2508 if (!stat_config.user_requested_cpu_list) { 2509 status = -ENOMEM; 2510 goto out; 2511 } 2512 } 2513 2514 /* 2515 * Metric parsing needs to be delayed as metrics may optimize events 2516 * knowing the target is system-wide. 2517 */ 2518 if (metrics) { 2519 metricgroup__parse_groups(evsel_list, metrics, 2520 stat_config.metric_no_group, 2521 stat_config.metric_no_merge, 2522 stat_config.user_requested_cpu_list, 2523 stat_config.system_wide, 2524 &stat_config.metric_events); 2525 zfree(&metrics); 2526 } 2527 perf_stat__collect_metric_expr(evsel_list); 2528 perf_stat__init_shadow_stats(); 2529 2530 if (add_default_attributes()) 2531 goto out; 2532 2533 if (stat_config.cgroup_list) { 2534 if (nr_cgroups > 0) { 2535 pr_err("--cgroup and --for-each-cgroup cannot be used together\n"); 2536 parse_options_usage(stat_usage, stat_options, "G", 1); 2537 parse_options_usage(NULL, stat_options, "for-each-cgroup", 0); 2538 goto out; 2539 } 2540 2541 if (evlist__expand_cgroup(evsel_list, stat_config.cgroup_list, 2542 &stat_config.metric_events, true) < 0) { 2543 parse_options_usage(stat_usage, stat_options, 2544 "for-each-cgroup", 0); 2545 goto out; 2546 } 2547 } 2548 2549 if (evlist__fix_hybrid_cpus(evsel_list, target.cpu_list)) { 2550 pr_err("failed to use cpu list %s\n", target.cpu_list); 2551 goto out; 2552 } 2553 2554 target.hybrid = perf_pmu__has_hybrid(); 2555 if (evlist__create_maps(evsel_list, &target) < 0) { 2556 if (target__has_task(&target)) { 2557 pr_err("Problems finding threads of monitor\n"); 2558 parse_options_usage(stat_usage, stat_options, "p", 1); 2559 parse_options_usage(NULL, stat_options, "t", 1); 2560 } else if (target__has_cpu(&target)) { 2561 perror("failed to parse CPUs map"); 2562 parse_options_usage(stat_usage, stat_options, "C", 1); 2563 parse_options_usage(NULL, stat_options, "a", 1); 2564 } 2565 goto out; 2566 } 2567 2568 evlist__check_cpu_maps(evsel_list); 2569 2570 /* 2571 * Initialize thread_map with comm names, 2572 * so we could print it out on output. 2573 */ 2574 if (stat_config.aggr_mode == AGGR_THREAD) { 2575 thread_map__read_comms(evsel_list->core.threads); 2576 } 2577 2578 if (stat_config.aggr_mode == AGGR_NODE) 2579 cpu__setup_cpunode_map(); 2580 2581 if (stat_config.times && interval) 2582 interval_count = true; 2583 else if (stat_config.times && !interval) { 2584 pr_err("interval-count option should be used together with " 2585 "interval-print.\n"); 2586 parse_options_usage(stat_usage, stat_options, "interval-count", 0); 2587 parse_options_usage(stat_usage, stat_options, "I", 1); 2588 goto out; 2589 } 2590 2591 if (timeout && timeout < 100) { 2592 if (timeout < 10) { 2593 pr_err("timeout must be >= 10ms.\n"); 2594 parse_options_usage(stat_usage, stat_options, "timeout", 0); 2595 goto out; 2596 } else 2597 pr_warning("timeout < 100ms. " 2598 "The overhead percentage could be high in some cases. " 2599 "Please proceed with caution.\n"); 2600 } 2601 if (timeout && interval) { 2602 pr_err("timeout option is not supported with interval-print.\n"); 2603 parse_options_usage(stat_usage, stat_options, "timeout", 0); 2604 parse_options_usage(stat_usage, stat_options, "I", 1); 2605 goto out; 2606 } 2607 2608 if (perf_stat_init_aggr_mode()) 2609 goto out; 2610 2611 if (evlist__alloc_stats(&stat_config, evsel_list, interval)) 2612 goto out; 2613 2614 /* 2615 * Set sample_type to PERF_SAMPLE_IDENTIFIER, which should be harmless 2616 * while avoiding that older tools show confusing messages. 2617 * 2618 * However for pipe sessions we need to keep it zero, 2619 * because script's perf_evsel__check_attr is triggered 2620 * by attr->sample_type != 0, and we can't run it on 2621 * stat sessions. 2622 */ 2623 stat_config.identifier = !(STAT_RECORD && perf_stat.data.is_pipe); 2624 2625 /* 2626 * We dont want to block the signals - that would cause 2627 * child tasks to inherit that and Ctrl-C would not work. 2628 * What we want is for Ctrl-C to work in the exec()-ed 2629 * task, but being ignored by perf stat itself: 2630 */ 2631 atexit(sig_atexit); 2632 if (!forever) 2633 signal(SIGINT, skip_signal); 2634 signal(SIGCHLD, skip_signal); 2635 signal(SIGALRM, skip_signal); 2636 signal(SIGABRT, skip_signal); 2637 2638 if (evlist__initialize_ctlfd(evsel_list, stat_config.ctl_fd, stat_config.ctl_fd_ack)) 2639 goto out; 2640 2641 /* Enable ignoring missing threads when -p option is defined. */ 2642 evlist__first(evsel_list)->ignore_missing_thread = target.pid; 2643 status = 0; 2644 for (run_idx = 0; forever || run_idx < stat_config.run_count; run_idx++) { 2645 if (stat_config.run_count != 1 && verbose > 0) 2646 fprintf(output, "[ perf stat: executing run #%d ... ]\n", 2647 run_idx + 1); 2648 2649 if (run_idx != 0) 2650 evlist__reset_prev_raw_counts(evsel_list); 2651 2652 status = run_perf_stat(argc, argv, run_idx); 2653 if (forever && status != -1 && !interval) { 2654 print_counters(NULL, argc, argv); 2655 perf_stat__reset_stats(); 2656 } 2657 } 2658 2659 if (!forever && status != -1 && (!interval || stat_config.summary)) 2660 print_counters(NULL, argc, argv); 2661 2662 evlist__finalize_ctlfd(evsel_list); 2663 2664 if (STAT_RECORD) { 2665 /* 2666 * We synthesize the kernel mmap record just so that older tools 2667 * don't emit warnings about not being able to resolve symbols 2668 * due to /proc/sys/kernel/kptr_restrict settings and instead provide 2669 * a saner message about no samples being in the perf.data file. 2670 * 2671 * This also serves to suppress a warning about f_header.data.size == 0 2672 * in header.c at the moment 'perf stat record' gets introduced, which 2673 * is not really needed once we start adding the stat specific PERF_RECORD_ 2674 * records, but the need to suppress the kptr_restrict messages in older 2675 * tools remain -acme 2676 */ 2677 int fd = perf_data__fd(&perf_stat.data); 2678 2679 err = perf_event__synthesize_kernel_mmap((void *)&perf_stat, 2680 process_synthesized_event, 2681 &perf_stat.session->machines.host); 2682 if (err) { 2683 pr_warning("Couldn't synthesize the kernel mmap record, harmless, " 2684 "older tools may produce warnings about this file\n."); 2685 } 2686 2687 if (!interval) { 2688 if (WRITE_STAT_ROUND_EVENT(walltime_nsecs_stats.max, FINAL)) 2689 pr_err("failed to write stat round event\n"); 2690 } 2691 2692 if (!perf_stat.data.is_pipe) { 2693 perf_stat.session->header.data_size += perf_stat.bytes_written; 2694 perf_session__write_header(perf_stat.session, evsel_list, fd, true); 2695 } 2696 2697 evlist__close(evsel_list); 2698 perf_session__delete(perf_stat.session); 2699 } 2700 2701 perf_stat__exit_aggr_mode(); 2702 evlist__free_stats(evsel_list); 2703 out: 2704 if (stat_config.iostat_run) 2705 iostat_release(evsel_list); 2706 2707 zfree(&stat_config.walltime_run); 2708 zfree(&stat_config.user_requested_cpu_list); 2709 2710 if (smi_cost && smi_reset) 2711 sysfs__write_int(FREEZE_ON_SMI_PATH, 0); 2712 2713 evlist__delete(evsel_list); 2714 2715 metricgroup__rblist_exit(&stat_config.metric_events); 2716 evlist__close_control(stat_config.ctl_fd, stat_config.ctl_fd_ack, &stat_config.ctl_fd_close); 2717 2718 return status; 2719 } 2720