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