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