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