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/group.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 "asm/bug.h" 71 72 #include <linux/time64.h> 73 #include <linux/zalloc.h> 74 #include <api/fs/fs.h> 75 #include <errno.h> 76 #include <signal.h> 77 #include <stdlib.h> 78 #include <sys/prctl.h> 79 #include <inttypes.h> 80 #include <locale.h> 81 #include <math.h> 82 #include <sys/types.h> 83 #include <sys/stat.h> 84 #include <sys/wait.h> 85 #include <unistd.h> 86 #include <sys/time.h> 87 #include <sys/resource.h> 88 #include <linux/err.h> 89 90 #include <linux/ctype.h> 91 #include <perf/evlist.h> 92 93 #define DEFAULT_SEPARATOR " " 94 #define FREEZE_ON_SMI_PATH "devices/cpu/freeze_on_smi" 95 96 static void print_counters(struct timespec *ts, int argc, const char **argv); 97 98 /* Default events used for perf stat -T */ 99 static const char *transaction_attrs = { 100 "task-clock," 101 "{" 102 "instructions," 103 "cycles," 104 "cpu/cycles-t/," 105 "cpu/tx-start/," 106 "cpu/el-start/," 107 "cpu/cycles-ct/" 108 "}" 109 }; 110 111 /* More limited version when the CPU does not have all events. */ 112 static const char * transaction_limited_attrs = { 113 "task-clock," 114 "{" 115 "instructions," 116 "cycles," 117 "cpu/cycles-t/," 118 "cpu/tx-start/" 119 "}" 120 }; 121 122 static const char * topdown_attrs[] = { 123 "topdown-total-slots", 124 "topdown-slots-retired", 125 "topdown-recovery-bubbles", 126 "topdown-fetch-bubbles", 127 "topdown-slots-issued", 128 NULL, 129 }; 130 131 static const char *smi_cost_attrs = { 132 "{" 133 "msr/aperf/," 134 "msr/smi/," 135 "cycles" 136 "}" 137 }; 138 139 static struct evlist *evsel_list; 140 141 static struct target target = { 142 .uid = UINT_MAX, 143 }; 144 145 #define METRIC_ONLY_LEN 20 146 147 static volatile pid_t child_pid = -1; 148 static int detailed_run = 0; 149 static bool transaction_run; 150 static bool topdown_run = false; 151 static bool smi_cost = false; 152 static bool smi_reset = false; 153 static int big_num_opt = -1; 154 static bool group = false; 155 static const char *pre_cmd = NULL; 156 static const char *post_cmd = NULL; 157 static bool sync_run = false; 158 static bool forever = false; 159 static bool force_metric_only = false; 160 static struct timespec ref_time; 161 static bool append_file; 162 static bool interval_count; 163 static const char *output_name; 164 static int output_fd; 165 166 struct perf_stat { 167 bool record; 168 struct perf_data data; 169 struct perf_session *session; 170 u64 bytes_written; 171 struct perf_tool tool; 172 bool maps_allocated; 173 struct perf_cpu_map *cpus; 174 struct perf_thread_map *threads; 175 enum aggr_mode aggr_mode; 176 }; 177 178 static struct perf_stat perf_stat; 179 #define STAT_RECORD perf_stat.record 180 181 static volatile int done = 0; 182 183 static struct perf_stat_config stat_config = { 184 .aggr_mode = AGGR_GLOBAL, 185 .scale = true, 186 .unit_width = 4, /* strlen("unit") */ 187 .run_count = 1, 188 .metric_only_len = METRIC_ONLY_LEN, 189 .walltime_nsecs_stats = &walltime_nsecs_stats, 190 .big_num = true, 191 .ctl_fd = -1, 192 .ctl_fd_ack = -1 193 }; 194 195 static bool cpus_map_matched(struct evsel *a, struct evsel *b) 196 { 197 if (!a->core.cpus && !b->core.cpus) 198 return true; 199 200 if (!a->core.cpus || !b->core.cpus) 201 return false; 202 203 if (a->core.cpus->nr != b->core.cpus->nr) 204 return false; 205 206 for (int i = 0; i < a->core.cpus->nr; i++) { 207 if (a->core.cpus->map[i] != b->core.cpus->map[i]) 208 return false; 209 } 210 211 return true; 212 } 213 214 static void evlist__check_cpu_maps(struct evlist *evlist) 215 { 216 struct evsel *evsel, *pos, *leader; 217 char buf[1024]; 218 219 evlist__for_each_entry(evlist, evsel) { 220 leader = evsel->leader; 221 222 /* Check that leader matches cpus with each member. */ 223 if (leader == evsel) 224 continue; 225 if (cpus_map_matched(leader, evsel)) 226 continue; 227 228 /* If there's mismatch disable the group and warn user. */ 229 WARN_ONCE(1, "WARNING: grouped events cpus do not match, disabling group:\n"); 230 evsel__group_desc(leader, buf, sizeof(buf)); 231 pr_warning(" %s\n", buf); 232 233 if (verbose) { 234 cpu_map__snprint(leader->core.cpus, buf, sizeof(buf)); 235 pr_warning(" %s: %s\n", leader->name, buf); 236 cpu_map__snprint(evsel->core.cpus, buf, sizeof(buf)); 237 pr_warning(" %s: %s\n", evsel->name, buf); 238 } 239 240 for_each_group_evsel(pos, leader) { 241 pos->leader = pos; 242 pos->core.nr_members = 0; 243 } 244 evsel->leader->core.nr_members = 0; 245 } 246 } 247 248 static inline void diff_timespec(struct timespec *r, struct timespec *a, 249 struct timespec *b) 250 { 251 r->tv_sec = a->tv_sec - b->tv_sec; 252 if (a->tv_nsec < b->tv_nsec) { 253 r->tv_nsec = a->tv_nsec + NSEC_PER_SEC - b->tv_nsec; 254 r->tv_sec--; 255 } else { 256 r->tv_nsec = a->tv_nsec - b->tv_nsec ; 257 } 258 } 259 260 static void perf_stat__reset_stats(void) 261 { 262 int i; 263 264 perf_evlist__reset_stats(evsel_list); 265 perf_stat__reset_shadow_stats(); 266 267 for (i = 0; i < stat_config.stats_num; i++) 268 perf_stat__reset_shadow_per_stat(&stat_config.stats[i]); 269 } 270 271 static int process_synthesized_event(struct perf_tool *tool __maybe_unused, 272 union perf_event *event, 273 struct perf_sample *sample __maybe_unused, 274 struct machine *machine __maybe_unused) 275 { 276 if (perf_data__write(&perf_stat.data, event, event->header.size) < 0) { 277 pr_err("failed to write perf data, error: %m\n"); 278 return -1; 279 } 280 281 perf_stat.bytes_written += event->header.size; 282 return 0; 283 } 284 285 static int write_stat_round_event(u64 tm, u64 type) 286 { 287 return perf_event__synthesize_stat_round(NULL, tm, type, 288 process_synthesized_event, 289 NULL); 290 } 291 292 #define WRITE_STAT_ROUND_EVENT(time, interval) \ 293 write_stat_round_event(time, PERF_STAT_ROUND_TYPE__ ## interval) 294 295 #define SID(e, x, y) xyarray__entry(e->core.sample_id, x, y) 296 297 static int evsel__write_stat_event(struct evsel *counter, u32 cpu, u32 thread, 298 struct perf_counts_values *count) 299 { 300 struct perf_sample_id *sid = SID(counter, cpu, thread); 301 302 return perf_event__synthesize_stat(NULL, cpu, thread, sid->id, count, 303 process_synthesized_event, NULL); 304 } 305 306 static int read_single_counter(struct evsel *counter, int cpu, 307 int thread, struct timespec *rs) 308 { 309 if (counter->tool_event == PERF_TOOL_DURATION_TIME) { 310 u64 val = rs->tv_nsec + rs->tv_sec*1000000000ULL; 311 struct perf_counts_values *count = 312 perf_counts(counter->counts, cpu, thread); 313 count->ena = count->run = val; 314 count->val = val; 315 return 0; 316 } 317 return evsel__read_counter(counter, cpu, thread); 318 } 319 320 /* 321 * Read out the results of a single counter: 322 * do not aggregate counts across CPUs in system-wide mode 323 */ 324 static int read_counter_cpu(struct evsel *counter, struct timespec *rs, int cpu) 325 { 326 int nthreads = perf_thread_map__nr(evsel_list->core.threads); 327 int thread; 328 329 if (!counter->supported) 330 return -ENOENT; 331 332 if (counter->core.system_wide) 333 nthreads = 1; 334 335 for (thread = 0; thread < nthreads; thread++) { 336 struct perf_counts_values *count; 337 338 count = perf_counts(counter->counts, cpu, thread); 339 340 /* 341 * The leader's group read loads data into its group members 342 * (via evsel__read_counter()) and sets their count->loaded. 343 */ 344 if (!perf_counts__is_loaded(counter->counts, cpu, thread) && 345 read_single_counter(counter, cpu, thread, rs)) { 346 counter->counts->scaled = -1; 347 perf_counts(counter->counts, cpu, thread)->ena = 0; 348 perf_counts(counter->counts, cpu, thread)->run = 0; 349 return -1; 350 } 351 352 perf_counts__set_loaded(counter->counts, cpu, thread, false); 353 354 if (STAT_RECORD) { 355 if (evsel__write_stat_event(counter, cpu, thread, count)) { 356 pr_err("failed to write stat event\n"); 357 return -1; 358 } 359 } 360 361 if (verbose > 1) { 362 fprintf(stat_config.output, 363 "%s: %d: %" PRIu64 " %" PRIu64 " %" PRIu64 "\n", 364 evsel__name(counter), 365 cpu, 366 count->val, count->ena, count->run); 367 } 368 } 369 370 return 0; 371 } 372 373 static int read_affinity_counters(struct timespec *rs) 374 { 375 struct evsel *counter; 376 struct affinity affinity; 377 int i, ncpus, cpu; 378 379 if (affinity__setup(&affinity) < 0) 380 return -1; 381 382 ncpus = perf_cpu_map__nr(evsel_list->core.all_cpus); 383 if (!target__has_cpu(&target) || target__has_per_thread(&target)) 384 ncpus = 1; 385 evlist__for_each_cpu(evsel_list, i, cpu) { 386 if (i >= ncpus) 387 break; 388 affinity__set(&affinity, cpu); 389 390 evlist__for_each_entry(evsel_list, counter) { 391 if (evsel__cpu_iter_skip(counter, cpu)) 392 continue; 393 if (!counter->err) { 394 counter->err = read_counter_cpu(counter, rs, 395 counter->cpu_iter - 1); 396 } 397 } 398 } 399 affinity__cleanup(&affinity); 400 return 0; 401 } 402 403 static void read_counters(struct timespec *rs) 404 { 405 struct evsel *counter; 406 407 if (!stat_config.summary && (read_affinity_counters(rs) < 0)) 408 return; 409 410 evlist__for_each_entry(evsel_list, counter) { 411 if (counter->err) 412 pr_debug("failed to read counter %s\n", counter->name); 413 if (counter->err == 0 && perf_stat_process_counter(&stat_config, counter)) 414 pr_warning("failed to process counter %s\n", counter->name); 415 counter->err = 0; 416 } 417 } 418 419 static int runtime_stat_new(struct perf_stat_config *config, int nthreads) 420 { 421 int i; 422 423 config->stats = calloc(nthreads, sizeof(struct runtime_stat)); 424 if (!config->stats) 425 return -1; 426 427 config->stats_num = nthreads; 428 429 for (i = 0; i < nthreads; i++) 430 runtime_stat__init(&config->stats[i]); 431 432 return 0; 433 } 434 435 static void runtime_stat_delete(struct perf_stat_config *config) 436 { 437 int i; 438 439 if (!config->stats) 440 return; 441 442 for (i = 0; i < config->stats_num; i++) 443 runtime_stat__exit(&config->stats[i]); 444 445 zfree(&config->stats); 446 } 447 448 static void runtime_stat_reset(struct perf_stat_config *config) 449 { 450 int i; 451 452 if (!config->stats) 453 return; 454 455 for (i = 0; i < config->stats_num; i++) 456 perf_stat__reset_shadow_per_stat(&config->stats[i]); 457 } 458 459 static void process_interval(void) 460 { 461 struct timespec ts, rs; 462 463 clock_gettime(CLOCK_MONOTONIC, &ts); 464 diff_timespec(&rs, &ts, &ref_time); 465 466 perf_stat__reset_shadow_per_stat(&rt_stat); 467 runtime_stat_reset(&stat_config); 468 read_counters(&rs); 469 470 if (STAT_RECORD) { 471 if (WRITE_STAT_ROUND_EVENT(rs.tv_sec * NSEC_PER_SEC + rs.tv_nsec, INTERVAL)) 472 pr_err("failed to write stat round event\n"); 473 } 474 475 init_stats(&walltime_nsecs_stats); 476 update_stats(&walltime_nsecs_stats, stat_config.interval * 1000000ULL); 477 print_counters(&rs, 0, NULL); 478 } 479 480 static bool handle_interval(unsigned int interval, int *times) 481 { 482 if (interval) { 483 process_interval(); 484 if (interval_count && !(--(*times))) 485 return true; 486 } 487 return false; 488 } 489 490 static void enable_counters(void) 491 { 492 if (stat_config.initial_delay < 0) { 493 pr_info(EVLIST_DISABLED_MSG); 494 return; 495 } 496 497 if (stat_config.initial_delay > 0) { 498 pr_info(EVLIST_DISABLED_MSG); 499 usleep(stat_config.initial_delay * USEC_PER_MSEC); 500 } 501 502 /* 503 * We need to enable counters only if: 504 * - we don't have tracee (attaching to task or cpu) 505 * - we have initial delay configured 506 */ 507 if (!target__none(&target) || stat_config.initial_delay) { 508 evlist__enable(evsel_list); 509 if (stat_config.initial_delay > 0) 510 pr_info(EVLIST_ENABLED_MSG); 511 } 512 } 513 514 static void disable_counters(void) 515 { 516 /* 517 * If we don't have tracee (attaching to task or cpu), counters may 518 * still be running. To get accurate group ratios, we must stop groups 519 * from counting before reading their constituent counters. 520 */ 521 if (!target__none(&target)) 522 evlist__disable(evsel_list); 523 } 524 525 static volatile int workload_exec_errno; 526 527 /* 528 * perf_evlist__prepare_workload will send a SIGUSR1 529 * if the fork fails, since we asked by setting its 530 * want_signal to true. 531 */ 532 static void workload_exec_failed_signal(int signo __maybe_unused, siginfo_t *info, 533 void *ucontext __maybe_unused) 534 { 535 workload_exec_errno = info->si_value.sival_int; 536 } 537 538 static bool evsel__should_store_id(struct evsel *counter) 539 { 540 return STAT_RECORD || counter->core.attr.read_format & PERF_FORMAT_ID; 541 } 542 543 static bool is_target_alive(struct target *_target, 544 struct perf_thread_map *threads) 545 { 546 struct stat st; 547 int i; 548 549 if (!target__has_task(_target)) 550 return true; 551 552 for (i = 0; i < threads->nr; i++) { 553 char path[PATH_MAX]; 554 555 scnprintf(path, PATH_MAX, "%s/%d", procfs__mountpoint(), 556 threads->map[i].pid); 557 558 if (!stat(path, &st)) 559 return true; 560 } 561 562 return false; 563 } 564 565 static void process_evlist(struct evlist *evlist, unsigned int interval) 566 { 567 enum evlist_ctl_cmd cmd = EVLIST_CTL_CMD_UNSUPPORTED; 568 569 if (evlist__ctlfd_process(evlist, &cmd) > 0) { 570 switch (cmd) { 571 case EVLIST_CTL_CMD_ENABLE: 572 pr_info(EVLIST_ENABLED_MSG); 573 if (interval) 574 process_interval(); 575 break; 576 case EVLIST_CTL_CMD_DISABLE: 577 if (interval) 578 process_interval(); 579 pr_info(EVLIST_DISABLED_MSG); 580 break; 581 case EVLIST_CTL_CMD_ACK: 582 case EVLIST_CTL_CMD_UNSUPPORTED: 583 default: 584 break; 585 } 586 } 587 } 588 589 static void compute_tts(struct timespec *time_start, struct timespec *time_stop, 590 int *time_to_sleep) 591 { 592 int tts = *time_to_sleep; 593 struct timespec time_diff; 594 595 diff_timespec(&time_diff, time_stop, time_start); 596 597 tts -= time_diff.tv_sec * MSEC_PER_SEC + 598 time_diff.tv_nsec / NSEC_PER_MSEC; 599 600 if (tts < 0) 601 tts = 0; 602 603 *time_to_sleep = tts; 604 } 605 606 static int dispatch_events(bool forks, int timeout, int interval, int *times) 607 { 608 int child_exited = 0, status = 0; 609 int time_to_sleep, sleep_time; 610 struct timespec time_start, time_stop; 611 612 if (interval) 613 sleep_time = interval; 614 else if (timeout) 615 sleep_time = timeout; 616 else 617 sleep_time = 1000; 618 619 time_to_sleep = sleep_time; 620 621 while (!done) { 622 if (forks) 623 child_exited = waitpid(child_pid, &status, WNOHANG); 624 else 625 child_exited = !is_target_alive(&target, evsel_list->core.threads) ? 1 : 0; 626 627 if (child_exited) 628 break; 629 630 clock_gettime(CLOCK_MONOTONIC, &time_start); 631 if (!(evlist__poll(evsel_list, time_to_sleep) > 0)) { /* poll timeout or EINTR */ 632 if (timeout || handle_interval(interval, times)) 633 break; 634 time_to_sleep = sleep_time; 635 } else { /* fd revent */ 636 process_evlist(evsel_list, interval); 637 clock_gettime(CLOCK_MONOTONIC, &time_stop); 638 compute_tts(&time_start, &time_stop, &time_to_sleep); 639 } 640 } 641 642 return status; 643 } 644 645 enum counter_recovery { 646 COUNTER_SKIP, 647 COUNTER_RETRY, 648 COUNTER_FATAL, 649 }; 650 651 static enum counter_recovery stat_handle_error(struct evsel *counter) 652 { 653 char msg[BUFSIZ]; 654 /* 655 * PPC returns ENXIO for HW counters until 2.6.37 656 * (behavior changed with commit b0a873e). 657 */ 658 if (errno == EINVAL || errno == ENOSYS || 659 errno == ENOENT || errno == EOPNOTSUPP || 660 errno == ENXIO) { 661 if (verbose > 0) 662 ui__warning("%s event is not supported by the kernel.\n", 663 evsel__name(counter)); 664 counter->supported = false; 665 /* 666 * errored is a sticky flag that means one of the counter's 667 * cpu event had a problem and needs to be reexamined. 668 */ 669 counter->errored = true; 670 671 if ((counter->leader != counter) || 672 !(counter->leader->core.nr_members > 1)) 673 return COUNTER_SKIP; 674 } else if (evsel__fallback(counter, errno, msg, sizeof(msg))) { 675 if (verbose > 0) 676 ui__warning("%s\n", msg); 677 return COUNTER_RETRY; 678 } else if (target__has_per_thread(&target) && 679 evsel_list->core.threads && 680 evsel_list->core.threads->err_thread != -1) { 681 /* 682 * For global --per-thread case, skip current 683 * error thread. 684 */ 685 if (!thread_map__remove(evsel_list->core.threads, 686 evsel_list->core.threads->err_thread)) { 687 evsel_list->core.threads->err_thread = -1; 688 return COUNTER_RETRY; 689 } 690 } 691 692 evsel__open_strerror(counter, &target, errno, msg, sizeof(msg)); 693 ui__error("%s\n", msg); 694 695 if (child_pid != -1) 696 kill(child_pid, SIGTERM); 697 return COUNTER_FATAL; 698 } 699 700 static int __run_perf_stat(int argc, const char **argv, int run_idx) 701 { 702 int interval = stat_config.interval; 703 int times = stat_config.times; 704 int timeout = stat_config.timeout; 705 char msg[BUFSIZ]; 706 unsigned long long t0, t1; 707 struct evsel *counter; 708 size_t l; 709 int status = 0; 710 const bool forks = (argc > 0); 711 bool is_pipe = STAT_RECORD ? perf_stat.data.is_pipe : false; 712 struct affinity affinity; 713 int i, cpu; 714 bool second_pass = false; 715 716 if (forks) { 717 if (perf_evlist__prepare_workload(evsel_list, &target, argv, is_pipe, 718 workload_exec_failed_signal) < 0) { 719 perror("failed to prepare workload"); 720 return -1; 721 } 722 child_pid = evsel_list->workload.pid; 723 } 724 725 if (group) 726 perf_evlist__set_leader(evsel_list); 727 728 if (affinity__setup(&affinity) < 0) 729 return -1; 730 731 evlist__for_each_cpu (evsel_list, i, cpu) { 732 affinity__set(&affinity, cpu); 733 734 evlist__for_each_entry(evsel_list, counter) { 735 if (evsel__cpu_iter_skip(counter, cpu)) 736 continue; 737 if (counter->reset_group || counter->errored) 738 continue; 739 try_again: 740 if (create_perf_stat_counter(counter, &stat_config, &target, 741 counter->cpu_iter - 1) < 0) { 742 743 /* 744 * Weak group failed. We cannot just undo this here 745 * because earlier CPUs might be in group mode, and the kernel 746 * doesn't support mixing group and non group reads. Defer 747 * it to later. 748 * Don't close here because we're in the wrong affinity. 749 */ 750 if ((errno == EINVAL || errno == EBADF) && 751 counter->leader != counter && 752 counter->weak_group) { 753 perf_evlist__reset_weak_group(evsel_list, counter, false); 754 assert(counter->reset_group); 755 second_pass = true; 756 continue; 757 } 758 759 switch (stat_handle_error(counter)) { 760 case COUNTER_FATAL: 761 return -1; 762 case COUNTER_RETRY: 763 goto try_again; 764 case COUNTER_SKIP: 765 continue; 766 default: 767 break; 768 } 769 770 } 771 counter->supported = true; 772 } 773 } 774 775 if (second_pass) { 776 /* 777 * Now redo all the weak group after closing them, 778 * and also close errored counters. 779 */ 780 781 evlist__for_each_cpu(evsel_list, i, cpu) { 782 affinity__set(&affinity, cpu); 783 /* First close errored or weak retry */ 784 evlist__for_each_entry(evsel_list, counter) { 785 if (!counter->reset_group && !counter->errored) 786 continue; 787 if (evsel__cpu_iter_skip_no_inc(counter, cpu)) 788 continue; 789 perf_evsel__close_cpu(&counter->core, counter->cpu_iter); 790 } 791 /* Now reopen weak */ 792 evlist__for_each_entry(evsel_list, counter) { 793 if (!counter->reset_group && !counter->errored) 794 continue; 795 if (evsel__cpu_iter_skip(counter, cpu)) 796 continue; 797 if (!counter->reset_group) 798 continue; 799 try_again_reset: 800 pr_debug2("reopening weak %s\n", evsel__name(counter)); 801 if (create_perf_stat_counter(counter, &stat_config, &target, 802 counter->cpu_iter - 1) < 0) { 803 804 switch (stat_handle_error(counter)) { 805 case COUNTER_FATAL: 806 return -1; 807 case COUNTER_RETRY: 808 goto try_again_reset; 809 case COUNTER_SKIP: 810 continue; 811 default: 812 break; 813 } 814 } 815 counter->supported = true; 816 } 817 } 818 } 819 affinity__cleanup(&affinity); 820 821 evlist__for_each_entry(evsel_list, counter) { 822 if (!counter->supported) { 823 perf_evsel__free_fd(&counter->core); 824 continue; 825 } 826 827 l = strlen(counter->unit); 828 if (l > stat_config.unit_width) 829 stat_config.unit_width = l; 830 831 if (evsel__should_store_id(counter) && 832 evsel__store_ids(counter, evsel_list)) 833 return -1; 834 } 835 836 if (perf_evlist__apply_filters(evsel_list, &counter)) { 837 pr_err("failed to set filter \"%s\" on event %s with %d (%s)\n", 838 counter->filter, evsel__name(counter), errno, 839 str_error_r(errno, msg, sizeof(msg))); 840 return -1; 841 } 842 843 if (STAT_RECORD) { 844 int err, fd = perf_data__fd(&perf_stat.data); 845 846 if (is_pipe) { 847 err = perf_header__write_pipe(perf_data__fd(&perf_stat.data)); 848 } else { 849 err = perf_session__write_header(perf_stat.session, evsel_list, 850 fd, false); 851 } 852 853 if (err < 0) 854 return err; 855 856 err = perf_event__synthesize_stat_events(&stat_config, NULL, evsel_list, 857 process_synthesized_event, is_pipe); 858 if (err < 0) 859 return err; 860 } 861 862 /* 863 * Enable counters and exec the command: 864 */ 865 t0 = rdclock(); 866 clock_gettime(CLOCK_MONOTONIC, &ref_time); 867 868 if (forks) { 869 perf_evlist__start_workload(evsel_list); 870 enable_counters(); 871 872 if (interval || timeout || evlist__ctlfd_initialized(evsel_list)) 873 status = dispatch_events(forks, timeout, interval, ×); 874 if (child_pid != -1) { 875 if (timeout) 876 kill(child_pid, SIGTERM); 877 wait4(child_pid, &status, 0, &stat_config.ru_data); 878 } 879 880 if (workload_exec_errno) { 881 const char *emsg = str_error_r(workload_exec_errno, msg, sizeof(msg)); 882 pr_err("Workload failed: %s\n", emsg); 883 return -1; 884 } 885 886 if (WIFSIGNALED(status)) 887 psignal(WTERMSIG(status), argv[0]); 888 } else { 889 enable_counters(); 890 status = dispatch_events(forks, timeout, interval, ×); 891 } 892 893 disable_counters(); 894 895 t1 = rdclock(); 896 897 if (stat_config.walltime_run_table) 898 stat_config.walltime_run[run_idx] = t1 - t0; 899 900 if (interval) { 901 stat_config.interval = 0; 902 stat_config.summary = true; 903 init_stats(&walltime_nsecs_stats); 904 update_stats(&walltime_nsecs_stats, t1 - t0); 905 906 if (stat_config.aggr_mode == AGGR_GLOBAL) 907 perf_evlist__save_aggr_prev_raw_counts(evsel_list); 908 909 perf_evlist__copy_prev_raw_counts(evsel_list); 910 perf_evlist__reset_prev_raw_counts(evsel_list); 911 runtime_stat_reset(&stat_config); 912 perf_stat__reset_shadow_per_stat(&rt_stat); 913 } else 914 update_stats(&walltime_nsecs_stats, t1 - t0); 915 916 /* 917 * Closing a group leader splits the group, and as we only disable 918 * group leaders, results in remaining events becoming enabled. To 919 * avoid arbitrary skew, we must read all counters before closing any 920 * group leaders. 921 */ 922 read_counters(&(struct timespec) { .tv_nsec = t1-t0 }); 923 924 /* 925 * We need to keep evsel_list alive, because it's processed 926 * later the evsel_list will be closed after. 927 */ 928 if (!STAT_RECORD) 929 evlist__close(evsel_list); 930 931 return WEXITSTATUS(status); 932 } 933 934 static int run_perf_stat(int argc, const char **argv, int run_idx) 935 { 936 int ret; 937 938 if (pre_cmd) { 939 ret = system(pre_cmd); 940 if (ret) 941 return ret; 942 } 943 944 if (sync_run) 945 sync(); 946 947 ret = __run_perf_stat(argc, argv, run_idx); 948 if (ret) 949 return ret; 950 951 if (post_cmd) { 952 ret = system(post_cmd); 953 if (ret) 954 return ret; 955 } 956 957 return ret; 958 } 959 960 static void print_counters(struct timespec *ts, int argc, const char **argv) 961 { 962 /* Do not print anything if we record to the pipe. */ 963 if (STAT_RECORD && perf_stat.data.is_pipe) 964 return; 965 966 perf_evlist__print_counters(evsel_list, &stat_config, &target, 967 ts, argc, argv); 968 } 969 970 static volatile int signr = -1; 971 972 static void skip_signal(int signo) 973 { 974 if ((child_pid == -1) || stat_config.interval) 975 done = 1; 976 977 signr = signo; 978 /* 979 * render child_pid harmless 980 * won't send SIGTERM to a random 981 * process in case of race condition 982 * and fast PID recycling 983 */ 984 child_pid = -1; 985 } 986 987 static void sig_atexit(void) 988 { 989 sigset_t set, oset; 990 991 /* 992 * avoid race condition with SIGCHLD handler 993 * in skip_signal() which is modifying child_pid 994 * goal is to avoid send SIGTERM to a random 995 * process 996 */ 997 sigemptyset(&set); 998 sigaddset(&set, SIGCHLD); 999 sigprocmask(SIG_BLOCK, &set, &oset); 1000 1001 if (child_pid != -1) 1002 kill(child_pid, SIGTERM); 1003 1004 sigprocmask(SIG_SETMASK, &oset, NULL); 1005 1006 if (signr == -1) 1007 return; 1008 1009 signal(signr, SIG_DFL); 1010 kill(getpid(), signr); 1011 } 1012 1013 void perf_stat__set_big_num(int set) 1014 { 1015 stat_config.big_num = (set != 0); 1016 } 1017 1018 static int stat__set_big_num(const struct option *opt __maybe_unused, 1019 const char *s __maybe_unused, int unset) 1020 { 1021 big_num_opt = unset ? 0 : 1; 1022 perf_stat__set_big_num(!unset); 1023 return 0; 1024 } 1025 1026 static int enable_metric_only(const struct option *opt __maybe_unused, 1027 const char *s __maybe_unused, int unset) 1028 { 1029 force_metric_only = true; 1030 stat_config.metric_only = !unset; 1031 return 0; 1032 } 1033 1034 static int parse_metric_groups(const struct option *opt, 1035 const char *str, 1036 int unset __maybe_unused) 1037 { 1038 return metricgroup__parse_groups(opt, str, 1039 stat_config.metric_no_group, 1040 stat_config.metric_no_merge, 1041 &stat_config.metric_events); 1042 } 1043 1044 static int parse_control_option(const struct option *opt, 1045 const char *str, 1046 int unset __maybe_unused) 1047 { 1048 char *comma = NULL, *endptr = NULL; 1049 struct perf_stat_config *config = (struct perf_stat_config *)opt->value; 1050 1051 if (strncmp(str, "fd:", 3)) 1052 return -EINVAL; 1053 1054 config->ctl_fd = strtoul(&str[3], &endptr, 0); 1055 if (endptr == &str[3]) 1056 return -EINVAL; 1057 1058 comma = strchr(str, ','); 1059 if (comma) { 1060 if (endptr != comma) 1061 return -EINVAL; 1062 1063 config->ctl_fd_ack = strtoul(comma + 1, &endptr, 0); 1064 if (endptr == comma + 1 || *endptr != '\0') 1065 return -EINVAL; 1066 } 1067 1068 return 0; 1069 } 1070 1071 static struct option stat_options[] = { 1072 OPT_BOOLEAN('T', "transaction", &transaction_run, 1073 "hardware transaction statistics"), 1074 OPT_CALLBACK('e', "event", &evsel_list, "event", 1075 "event selector. use 'perf list' to list available events", 1076 parse_events_option), 1077 OPT_CALLBACK(0, "filter", &evsel_list, "filter", 1078 "event filter", parse_filter), 1079 OPT_BOOLEAN('i', "no-inherit", &stat_config.no_inherit, 1080 "child tasks do not inherit counters"), 1081 OPT_STRING('p', "pid", &target.pid, "pid", 1082 "stat events on existing process id"), 1083 OPT_STRING('t', "tid", &target.tid, "tid", 1084 "stat events on existing thread id"), 1085 OPT_BOOLEAN('a', "all-cpus", &target.system_wide, 1086 "system-wide collection from all CPUs"), 1087 OPT_BOOLEAN('g', "group", &group, 1088 "put the counters into a counter group"), 1089 OPT_BOOLEAN(0, "scale", &stat_config.scale, 1090 "Use --no-scale to disable counter scaling for multiplexing"), 1091 OPT_INCR('v', "verbose", &verbose, 1092 "be more verbose (show counter open errors, etc)"), 1093 OPT_INTEGER('r', "repeat", &stat_config.run_count, 1094 "repeat command and print average + stddev (max: 100, forever: 0)"), 1095 OPT_BOOLEAN(0, "table", &stat_config.walltime_run_table, 1096 "display details about each run (only with -r option)"), 1097 OPT_BOOLEAN('n', "null", &stat_config.null_run, 1098 "null run - dont start any counters"), 1099 OPT_INCR('d', "detailed", &detailed_run, 1100 "detailed run - start a lot of events"), 1101 OPT_BOOLEAN('S', "sync", &sync_run, 1102 "call sync() before starting a run"), 1103 OPT_CALLBACK_NOOPT('B', "big-num", NULL, NULL, 1104 "print large numbers with thousands\' separators", 1105 stat__set_big_num), 1106 OPT_STRING('C', "cpu", &target.cpu_list, "cpu", 1107 "list of cpus to monitor in system-wide"), 1108 OPT_SET_UINT('A', "no-aggr", &stat_config.aggr_mode, 1109 "disable CPU count aggregation", AGGR_NONE), 1110 OPT_BOOLEAN(0, "no-merge", &stat_config.no_merge, "Do not merge identical named events"), 1111 OPT_STRING('x', "field-separator", &stat_config.csv_sep, "separator", 1112 "print counts with custom separator"), 1113 OPT_CALLBACK('G', "cgroup", &evsel_list, "name", 1114 "monitor event in cgroup name only", parse_cgroups), 1115 OPT_STRING('o', "output", &output_name, "file", "output file name"), 1116 OPT_BOOLEAN(0, "append", &append_file, "append to the output file"), 1117 OPT_INTEGER(0, "log-fd", &output_fd, 1118 "log output to fd, instead of stderr"), 1119 OPT_STRING(0, "pre", &pre_cmd, "command", 1120 "command to run prior to the measured command"), 1121 OPT_STRING(0, "post", &post_cmd, "command", 1122 "command to run after to the measured command"), 1123 OPT_UINTEGER('I', "interval-print", &stat_config.interval, 1124 "print counts at regular interval in ms " 1125 "(overhead is possible for values <= 100ms)"), 1126 OPT_INTEGER(0, "interval-count", &stat_config.times, 1127 "print counts for fixed number of times"), 1128 OPT_BOOLEAN(0, "interval-clear", &stat_config.interval_clear, 1129 "clear screen in between new interval"), 1130 OPT_UINTEGER(0, "timeout", &stat_config.timeout, 1131 "stop workload and print counts after a timeout period in ms (>= 10ms)"), 1132 OPT_SET_UINT(0, "per-socket", &stat_config.aggr_mode, 1133 "aggregate counts per processor socket", AGGR_SOCKET), 1134 OPT_SET_UINT(0, "per-die", &stat_config.aggr_mode, 1135 "aggregate counts per processor die", AGGR_DIE), 1136 OPT_SET_UINT(0, "per-core", &stat_config.aggr_mode, 1137 "aggregate counts per physical processor core", AGGR_CORE), 1138 OPT_SET_UINT(0, "per-thread", &stat_config.aggr_mode, 1139 "aggregate counts per thread", AGGR_THREAD), 1140 OPT_SET_UINT(0, "per-node", &stat_config.aggr_mode, 1141 "aggregate counts per numa node", AGGR_NODE), 1142 OPT_INTEGER('D', "delay", &stat_config.initial_delay, 1143 "ms to wait before starting measurement after program start (-1: start with events disabled)"), 1144 OPT_CALLBACK_NOOPT(0, "metric-only", &stat_config.metric_only, NULL, 1145 "Only print computed metrics. No raw values", enable_metric_only), 1146 OPT_BOOLEAN(0, "metric-no-group", &stat_config.metric_no_group, 1147 "don't group metric events, impacts multiplexing"), 1148 OPT_BOOLEAN(0, "metric-no-merge", &stat_config.metric_no_merge, 1149 "don't try to share events between metrics in a group"), 1150 OPT_BOOLEAN(0, "topdown", &topdown_run, 1151 "measure topdown level 1 statistics"), 1152 OPT_BOOLEAN(0, "smi-cost", &smi_cost, 1153 "measure SMI cost"), 1154 OPT_CALLBACK('M', "metrics", &evsel_list, "metric/metric group list", 1155 "monitor specified metrics or metric groups (separated by ,)", 1156 parse_metric_groups), 1157 OPT_BOOLEAN_FLAG(0, "all-kernel", &stat_config.all_kernel, 1158 "Configure all used events to run in kernel space.", 1159 PARSE_OPT_EXCLUSIVE), 1160 OPT_BOOLEAN_FLAG(0, "all-user", &stat_config.all_user, 1161 "Configure all used events to run in user space.", 1162 PARSE_OPT_EXCLUSIVE), 1163 OPT_BOOLEAN(0, "percore-show-thread", &stat_config.percore_show_thread, 1164 "Use with 'percore' event qualifier to show the event " 1165 "counts of one hardware thread by sum up total hardware " 1166 "threads of same physical core"), 1167 #ifdef HAVE_LIBPFM 1168 OPT_CALLBACK(0, "pfm-events", &evsel_list, "event", 1169 "libpfm4 event selector. use 'perf list' to list available events", 1170 parse_libpfm_events_option), 1171 #endif 1172 OPT_CALLBACK(0, "control", &stat_config, "fd:ctl-fd[,ack-fd]", 1173 "Listen on ctl-fd descriptor for command to control measurement ('enable': enable events, 'disable': disable events).\n" 1174 "\t\t\t Optionally send control command completion ('ack\\n') to ack-fd descriptor.", 1175 parse_control_option), 1176 OPT_END() 1177 }; 1178 1179 static int perf_stat__get_socket(struct perf_stat_config *config __maybe_unused, 1180 struct perf_cpu_map *map, int cpu) 1181 { 1182 return cpu_map__get_socket(map, cpu, NULL); 1183 } 1184 1185 static int perf_stat__get_die(struct perf_stat_config *config __maybe_unused, 1186 struct perf_cpu_map *map, int cpu) 1187 { 1188 return cpu_map__get_die(map, cpu, NULL); 1189 } 1190 1191 static int perf_stat__get_core(struct perf_stat_config *config __maybe_unused, 1192 struct perf_cpu_map *map, int cpu) 1193 { 1194 return cpu_map__get_core(map, cpu, NULL); 1195 } 1196 1197 static int perf_stat__get_node(struct perf_stat_config *config __maybe_unused, 1198 struct perf_cpu_map *map, int cpu) 1199 { 1200 return cpu_map__get_node(map, cpu, NULL); 1201 } 1202 1203 static int perf_stat__get_aggr(struct perf_stat_config *config, 1204 aggr_get_id_t get_id, struct perf_cpu_map *map, int idx) 1205 { 1206 int cpu; 1207 1208 if (idx >= map->nr) 1209 return -1; 1210 1211 cpu = map->map[idx]; 1212 1213 if (config->cpus_aggr_map->map[cpu] == -1) 1214 config->cpus_aggr_map->map[cpu] = get_id(config, map, idx); 1215 1216 return config->cpus_aggr_map->map[cpu]; 1217 } 1218 1219 static int perf_stat__get_socket_cached(struct perf_stat_config *config, 1220 struct perf_cpu_map *map, int idx) 1221 { 1222 return perf_stat__get_aggr(config, perf_stat__get_socket, map, idx); 1223 } 1224 1225 static int perf_stat__get_die_cached(struct perf_stat_config *config, 1226 struct perf_cpu_map *map, int idx) 1227 { 1228 return perf_stat__get_aggr(config, perf_stat__get_die, map, idx); 1229 } 1230 1231 static int perf_stat__get_core_cached(struct perf_stat_config *config, 1232 struct perf_cpu_map *map, int idx) 1233 { 1234 return perf_stat__get_aggr(config, perf_stat__get_core, map, idx); 1235 } 1236 1237 static int perf_stat__get_node_cached(struct perf_stat_config *config, 1238 struct perf_cpu_map *map, int idx) 1239 { 1240 return perf_stat__get_aggr(config, perf_stat__get_node, map, idx); 1241 } 1242 1243 static bool term_percore_set(void) 1244 { 1245 struct evsel *counter; 1246 1247 evlist__for_each_entry(evsel_list, counter) { 1248 if (counter->percore) 1249 return true; 1250 } 1251 1252 return false; 1253 } 1254 1255 static int perf_stat_init_aggr_mode(void) 1256 { 1257 int nr; 1258 1259 switch (stat_config.aggr_mode) { 1260 case AGGR_SOCKET: 1261 if (cpu_map__build_socket_map(evsel_list->core.cpus, &stat_config.aggr_map)) { 1262 perror("cannot build socket map"); 1263 return -1; 1264 } 1265 stat_config.aggr_get_id = perf_stat__get_socket_cached; 1266 break; 1267 case AGGR_DIE: 1268 if (cpu_map__build_die_map(evsel_list->core.cpus, &stat_config.aggr_map)) { 1269 perror("cannot build die map"); 1270 return -1; 1271 } 1272 stat_config.aggr_get_id = perf_stat__get_die_cached; 1273 break; 1274 case AGGR_CORE: 1275 if (cpu_map__build_core_map(evsel_list->core.cpus, &stat_config.aggr_map)) { 1276 perror("cannot build core map"); 1277 return -1; 1278 } 1279 stat_config.aggr_get_id = perf_stat__get_core_cached; 1280 break; 1281 case AGGR_NODE: 1282 if (cpu_map__build_node_map(evsel_list->core.cpus, &stat_config.aggr_map)) { 1283 perror("cannot build core map"); 1284 return -1; 1285 } 1286 stat_config.aggr_get_id = perf_stat__get_node_cached; 1287 break; 1288 case AGGR_NONE: 1289 if (term_percore_set()) { 1290 if (cpu_map__build_core_map(evsel_list->core.cpus, 1291 &stat_config.aggr_map)) { 1292 perror("cannot build core map"); 1293 return -1; 1294 } 1295 stat_config.aggr_get_id = perf_stat__get_core_cached; 1296 } 1297 break; 1298 case AGGR_GLOBAL: 1299 case AGGR_THREAD: 1300 case AGGR_UNSET: 1301 default: 1302 break; 1303 } 1304 1305 /* 1306 * The evsel_list->cpus is the base we operate on, 1307 * taking the highest cpu number to be the size of 1308 * the aggregation translate cpumap. 1309 */ 1310 nr = perf_cpu_map__max(evsel_list->core.cpus); 1311 stat_config.cpus_aggr_map = perf_cpu_map__empty_new(nr + 1); 1312 return stat_config.cpus_aggr_map ? 0 : -ENOMEM; 1313 } 1314 1315 static void perf_stat__exit_aggr_mode(void) 1316 { 1317 perf_cpu_map__put(stat_config.aggr_map); 1318 perf_cpu_map__put(stat_config.cpus_aggr_map); 1319 stat_config.aggr_map = NULL; 1320 stat_config.cpus_aggr_map = NULL; 1321 } 1322 1323 static inline int perf_env__get_cpu(struct perf_env *env, struct perf_cpu_map *map, int idx) 1324 { 1325 int cpu; 1326 1327 if (idx > map->nr) 1328 return -1; 1329 1330 cpu = map->map[idx]; 1331 1332 if (cpu >= env->nr_cpus_avail) 1333 return -1; 1334 1335 return cpu; 1336 } 1337 1338 static int perf_env__get_socket(struct perf_cpu_map *map, int idx, void *data) 1339 { 1340 struct perf_env *env = data; 1341 int cpu = perf_env__get_cpu(env, map, idx); 1342 1343 return cpu == -1 ? -1 : env->cpu[cpu].socket_id; 1344 } 1345 1346 static int perf_env__get_die(struct perf_cpu_map *map, int idx, void *data) 1347 { 1348 struct perf_env *env = data; 1349 int die_id = -1, cpu = perf_env__get_cpu(env, map, idx); 1350 1351 if (cpu != -1) { 1352 /* 1353 * Encode socket in bit range 15:8 1354 * die_id is relative to socket, 1355 * we need a global id. So we combine 1356 * socket + die id 1357 */ 1358 if (WARN_ONCE(env->cpu[cpu].socket_id >> 8, "The socket id number is too big.\n")) 1359 return -1; 1360 1361 if (WARN_ONCE(env->cpu[cpu].die_id >> 8, "The die id number is too big.\n")) 1362 return -1; 1363 1364 die_id = (env->cpu[cpu].socket_id << 8) | (env->cpu[cpu].die_id & 0xff); 1365 } 1366 1367 return die_id; 1368 } 1369 1370 static int perf_env__get_core(struct perf_cpu_map *map, int idx, void *data) 1371 { 1372 struct perf_env *env = data; 1373 int core = -1, cpu = perf_env__get_cpu(env, map, idx); 1374 1375 if (cpu != -1) { 1376 /* 1377 * Encode socket in bit range 31:24 1378 * encode die id in bit range 23:16 1379 * core_id is relative to socket and die, 1380 * we need a global id. So we combine 1381 * socket + die id + core id 1382 */ 1383 if (WARN_ONCE(env->cpu[cpu].socket_id >> 8, "The socket id number is too big.\n")) 1384 return -1; 1385 1386 if (WARN_ONCE(env->cpu[cpu].die_id >> 8, "The die id number is too big.\n")) 1387 return -1; 1388 1389 if (WARN_ONCE(env->cpu[cpu].core_id >> 16, "The core id number is too big.\n")) 1390 return -1; 1391 1392 core = (env->cpu[cpu].socket_id << 24) | 1393 (env->cpu[cpu].die_id << 16) | 1394 (env->cpu[cpu].core_id & 0xffff); 1395 } 1396 1397 return core; 1398 } 1399 1400 static int perf_env__get_node(struct perf_cpu_map *map, int idx, void *data) 1401 { 1402 int cpu = perf_env__get_cpu(data, map, idx); 1403 1404 return perf_env__numa_node(data, cpu); 1405 } 1406 1407 static int perf_env__build_socket_map(struct perf_env *env, struct perf_cpu_map *cpus, 1408 struct perf_cpu_map **sockp) 1409 { 1410 return cpu_map__build_map(cpus, sockp, perf_env__get_socket, env); 1411 } 1412 1413 static int perf_env__build_die_map(struct perf_env *env, struct perf_cpu_map *cpus, 1414 struct perf_cpu_map **diep) 1415 { 1416 return cpu_map__build_map(cpus, diep, perf_env__get_die, env); 1417 } 1418 1419 static int perf_env__build_core_map(struct perf_env *env, struct perf_cpu_map *cpus, 1420 struct perf_cpu_map **corep) 1421 { 1422 return cpu_map__build_map(cpus, corep, perf_env__get_core, env); 1423 } 1424 1425 static int perf_env__build_node_map(struct perf_env *env, struct perf_cpu_map *cpus, 1426 struct perf_cpu_map **nodep) 1427 { 1428 return cpu_map__build_map(cpus, nodep, perf_env__get_node, env); 1429 } 1430 1431 static int perf_stat__get_socket_file(struct perf_stat_config *config __maybe_unused, 1432 struct perf_cpu_map *map, int idx) 1433 { 1434 return perf_env__get_socket(map, idx, &perf_stat.session->header.env); 1435 } 1436 static int perf_stat__get_die_file(struct perf_stat_config *config __maybe_unused, 1437 struct perf_cpu_map *map, int idx) 1438 { 1439 return perf_env__get_die(map, idx, &perf_stat.session->header.env); 1440 } 1441 1442 static int perf_stat__get_core_file(struct perf_stat_config *config __maybe_unused, 1443 struct perf_cpu_map *map, int idx) 1444 { 1445 return perf_env__get_core(map, idx, &perf_stat.session->header.env); 1446 } 1447 1448 static int perf_stat__get_node_file(struct perf_stat_config *config __maybe_unused, 1449 struct perf_cpu_map *map, int idx) 1450 { 1451 return perf_env__get_node(map, idx, &perf_stat.session->header.env); 1452 } 1453 1454 static int perf_stat_init_aggr_mode_file(struct perf_stat *st) 1455 { 1456 struct perf_env *env = &st->session->header.env; 1457 1458 switch (stat_config.aggr_mode) { 1459 case AGGR_SOCKET: 1460 if (perf_env__build_socket_map(env, evsel_list->core.cpus, &stat_config.aggr_map)) { 1461 perror("cannot build socket map"); 1462 return -1; 1463 } 1464 stat_config.aggr_get_id = perf_stat__get_socket_file; 1465 break; 1466 case AGGR_DIE: 1467 if (perf_env__build_die_map(env, evsel_list->core.cpus, &stat_config.aggr_map)) { 1468 perror("cannot build die map"); 1469 return -1; 1470 } 1471 stat_config.aggr_get_id = perf_stat__get_die_file; 1472 break; 1473 case AGGR_CORE: 1474 if (perf_env__build_core_map(env, evsel_list->core.cpus, &stat_config.aggr_map)) { 1475 perror("cannot build core map"); 1476 return -1; 1477 } 1478 stat_config.aggr_get_id = perf_stat__get_core_file; 1479 break; 1480 case AGGR_NODE: 1481 if (perf_env__build_node_map(env, evsel_list->core.cpus, &stat_config.aggr_map)) { 1482 perror("cannot build core map"); 1483 return -1; 1484 } 1485 stat_config.aggr_get_id = perf_stat__get_node_file; 1486 break; 1487 case AGGR_NONE: 1488 case AGGR_GLOBAL: 1489 case AGGR_THREAD: 1490 case AGGR_UNSET: 1491 default: 1492 break; 1493 } 1494 1495 return 0; 1496 } 1497 1498 static int topdown_filter_events(const char **attr, char **str, bool use_group) 1499 { 1500 int off = 0; 1501 int i; 1502 int len = 0; 1503 char *s; 1504 1505 for (i = 0; attr[i]; i++) { 1506 if (pmu_have_event("cpu", attr[i])) { 1507 len += strlen(attr[i]) + 1; 1508 attr[i - off] = attr[i]; 1509 } else 1510 off++; 1511 } 1512 attr[i - off] = NULL; 1513 1514 *str = malloc(len + 1 + 2); 1515 if (!*str) 1516 return -1; 1517 s = *str; 1518 if (i - off == 0) { 1519 *s = 0; 1520 return 0; 1521 } 1522 if (use_group) 1523 *s++ = '{'; 1524 for (i = 0; attr[i]; i++) { 1525 strcpy(s, attr[i]); 1526 s += strlen(s); 1527 *s++ = ','; 1528 } 1529 if (use_group) { 1530 s[-1] = '}'; 1531 *s = 0; 1532 } else 1533 s[-1] = 0; 1534 return 0; 1535 } 1536 1537 __weak bool arch_topdown_check_group(bool *warn) 1538 { 1539 *warn = false; 1540 return false; 1541 } 1542 1543 __weak void arch_topdown_group_warn(void) 1544 { 1545 } 1546 1547 /* 1548 * Add default attributes, if there were no attributes specified or 1549 * if -d/--detailed, -d -d or -d -d -d is used: 1550 */ 1551 static int add_default_attributes(void) 1552 { 1553 int err; 1554 struct perf_event_attr default_attrs0[] = { 1555 1556 { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_TASK_CLOCK }, 1557 { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_CONTEXT_SWITCHES }, 1558 { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_CPU_MIGRATIONS }, 1559 { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_PAGE_FAULTS }, 1560 1561 { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_CPU_CYCLES }, 1562 }; 1563 struct perf_event_attr frontend_attrs[] = { 1564 { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_STALLED_CYCLES_FRONTEND }, 1565 }; 1566 struct perf_event_attr backend_attrs[] = { 1567 { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_STALLED_CYCLES_BACKEND }, 1568 }; 1569 struct perf_event_attr default_attrs1[] = { 1570 { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_INSTRUCTIONS }, 1571 { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_BRANCH_INSTRUCTIONS }, 1572 { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_BRANCH_MISSES }, 1573 1574 }; 1575 1576 /* 1577 * Detailed stats (-d), covering the L1 and last level data caches: 1578 */ 1579 struct perf_event_attr detailed_attrs[] = { 1580 1581 { .type = PERF_TYPE_HW_CACHE, 1582 .config = 1583 PERF_COUNT_HW_CACHE_L1D << 0 | 1584 (PERF_COUNT_HW_CACHE_OP_READ << 8) | 1585 (PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16) }, 1586 1587 { .type = PERF_TYPE_HW_CACHE, 1588 .config = 1589 PERF_COUNT_HW_CACHE_L1D << 0 | 1590 (PERF_COUNT_HW_CACHE_OP_READ << 8) | 1591 (PERF_COUNT_HW_CACHE_RESULT_MISS << 16) }, 1592 1593 { .type = PERF_TYPE_HW_CACHE, 1594 .config = 1595 PERF_COUNT_HW_CACHE_LL << 0 | 1596 (PERF_COUNT_HW_CACHE_OP_READ << 8) | 1597 (PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16) }, 1598 1599 { .type = PERF_TYPE_HW_CACHE, 1600 .config = 1601 PERF_COUNT_HW_CACHE_LL << 0 | 1602 (PERF_COUNT_HW_CACHE_OP_READ << 8) | 1603 (PERF_COUNT_HW_CACHE_RESULT_MISS << 16) }, 1604 }; 1605 1606 /* 1607 * Very detailed stats (-d -d), covering the instruction cache and the TLB caches: 1608 */ 1609 struct perf_event_attr very_detailed_attrs[] = { 1610 1611 { .type = PERF_TYPE_HW_CACHE, 1612 .config = 1613 PERF_COUNT_HW_CACHE_L1I << 0 | 1614 (PERF_COUNT_HW_CACHE_OP_READ << 8) | 1615 (PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16) }, 1616 1617 { .type = PERF_TYPE_HW_CACHE, 1618 .config = 1619 PERF_COUNT_HW_CACHE_L1I << 0 | 1620 (PERF_COUNT_HW_CACHE_OP_READ << 8) | 1621 (PERF_COUNT_HW_CACHE_RESULT_MISS << 16) }, 1622 1623 { .type = PERF_TYPE_HW_CACHE, 1624 .config = 1625 PERF_COUNT_HW_CACHE_DTLB << 0 | 1626 (PERF_COUNT_HW_CACHE_OP_READ << 8) | 1627 (PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16) }, 1628 1629 { .type = PERF_TYPE_HW_CACHE, 1630 .config = 1631 PERF_COUNT_HW_CACHE_DTLB << 0 | 1632 (PERF_COUNT_HW_CACHE_OP_READ << 8) | 1633 (PERF_COUNT_HW_CACHE_RESULT_MISS << 16) }, 1634 1635 { .type = PERF_TYPE_HW_CACHE, 1636 .config = 1637 PERF_COUNT_HW_CACHE_ITLB << 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_ITLB << 0 | 1644 (PERF_COUNT_HW_CACHE_OP_READ << 8) | 1645 (PERF_COUNT_HW_CACHE_RESULT_MISS << 16) }, 1646 1647 }; 1648 1649 /* 1650 * Very, very detailed stats (-d -d -d), adding prefetch events: 1651 */ 1652 struct perf_event_attr very_very_detailed_attrs[] = { 1653 1654 { .type = PERF_TYPE_HW_CACHE, 1655 .config = 1656 PERF_COUNT_HW_CACHE_L1D << 0 | 1657 (PERF_COUNT_HW_CACHE_OP_PREFETCH << 8) | 1658 (PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16) }, 1659 1660 { .type = PERF_TYPE_HW_CACHE, 1661 .config = 1662 PERF_COUNT_HW_CACHE_L1D << 0 | 1663 (PERF_COUNT_HW_CACHE_OP_PREFETCH << 8) | 1664 (PERF_COUNT_HW_CACHE_RESULT_MISS << 16) }, 1665 }; 1666 struct parse_events_error errinfo; 1667 1668 /* Set attrs if no event is selected and !null_run: */ 1669 if (stat_config.null_run) 1670 return 0; 1671 1672 bzero(&errinfo, sizeof(errinfo)); 1673 if (transaction_run) { 1674 /* Handle -T as -M transaction. Once platform specific metrics 1675 * support has been added to the json files, all archictures 1676 * will use this approach. To determine transaction support 1677 * on an architecture test for such a metric name. 1678 */ 1679 if (metricgroup__has_metric("transaction")) { 1680 struct option opt = { .value = &evsel_list }; 1681 1682 return metricgroup__parse_groups(&opt, "transaction", 1683 stat_config.metric_no_group, 1684 stat_config.metric_no_merge, 1685 &stat_config.metric_events); 1686 } 1687 1688 if (pmu_have_event("cpu", "cycles-ct") && 1689 pmu_have_event("cpu", "el-start")) 1690 err = parse_events(evsel_list, transaction_attrs, 1691 &errinfo); 1692 else 1693 err = parse_events(evsel_list, 1694 transaction_limited_attrs, 1695 &errinfo); 1696 if (err) { 1697 fprintf(stderr, "Cannot set up transaction events\n"); 1698 parse_events_print_error(&errinfo, transaction_attrs); 1699 return -1; 1700 } 1701 return 0; 1702 } 1703 1704 if (smi_cost) { 1705 int smi; 1706 1707 if (sysfs__read_int(FREEZE_ON_SMI_PATH, &smi) < 0) { 1708 fprintf(stderr, "freeze_on_smi is not supported.\n"); 1709 return -1; 1710 } 1711 1712 if (!smi) { 1713 if (sysfs__write_int(FREEZE_ON_SMI_PATH, 1) < 0) { 1714 fprintf(stderr, "Failed to set freeze_on_smi.\n"); 1715 return -1; 1716 } 1717 smi_reset = true; 1718 } 1719 1720 if (pmu_have_event("msr", "aperf") && 1721 pmu_have_event("msr", "smi")) { 1722 if (!force_metric_only) 1723 stat_config.metric_only = true; 1724 err = parse_events(evsel_list, smi_cost_attrs, &errinfo); 1725 } else { 1726 fprintf(stderr, "To measure SMI cost, it needs " 1727 "msr/aperf/, msr/smi/ and cpu/cycles/ support\n"); 1728 parse_events_print_error(&errinfo, smi_cost_attrs); 1729 return -1; 1730 } 1731 if (err) { 1732 parse_events_print_error(&errinfo, smi_cost_attrs); 1733 fprintf(stderr, "Cannot set up SMI cost events\n"); 1734 return -1; 1735 } 1736 return 0; 1737 } 1738 1739 if (topdown_run) { 1740 char *str = NULL; 1741 bool warn = false; 1742 1743 if (stat_config.aggr_mode != AGGR_GLOBAL && 1744 stat_config.aggr_mode != AGGR_CORE) { 1745 pr_err("top down event configuration requires --per-core mode\n"); 1746 return -1; 1747 } 1748 stat_config.aggr_mode = AGGR_CORE; 1749 if (nr_cgroups || !target__has_cpu(&target)) { 1750 pr_err("top down event configuration requires system-wide mode (-a)\n"); 1751 return -1; 1752 } 1753 1754 if (!force_metric_only) 1755 stat_config.metric_only = true; 1756 if (topdown_filter_events(topdown_attrs, &str, 1757 arch_topdown_check_group(&warn)) < 0) { 1758 pr_err("Out of memory\n"); 1759 return -1; 1760 } 1761 if (topdown_attrs[0] && str) { 1762 if (warn) 1763 arch_topdown_group_warn(); 1764 err = parse_events(evsel_list, str, &errinfo); 1765 if (err) { 1766 fprintf(stderr, 1767 "Cannot set up top down events %s: %d\n", 1768 str, err); 1769 parse_events_print_error(&errinfo, str); 1770 free(str); 1771 return -1; 1772 } 1773 } else { 1774 fprintf(stderr, "System does not support topdown\n"); 1775 return -1; 1776 } 1777 free(str); 1778 } 1779 1780 if (!evsel_list->core.nr_entries) { 1781 if (target__has_cpu(&target)) 1782 default_attrs0[0].config = PERF_COUNT_SW_CPU_CLOCK; 1783 1784 if (evlist__add_default_attrs(evsel_list, default_attrs0) < 0) 1785 return -1; 1786 if (pmu_have_event("cpu", "stalled-cycles-frontend")) { 1787 if (evlist__add_default_attrs(evsel_list, frontend_attrs) < 0) 1788 return -1; 1789 } 1790 if (pmu_have_event("cpu", "stalled-cycles-backend")) { 1791 if (evlist__add_default_attrs(evsel_list, backend_attrs) < 0) 1792 return -1; 1793 } 1794 if (evlist__add_default_attrs(evsel_list, default_attrs1) < 0) 1795 return -1; 1796 } 1797 1798 /* Detailed events get appended to the event list: */ 1799 1800 if (detailed_run < 1) 1801 return 0; 1802 1803 /* Append detailed run extra attributes: */ 1804 if (evlist__add_default_attrs(evsel_list, detailed_attrs) < 0) 1805 return -1; 1806 1807 if (detailed_run < 2) 1808 return 0; 1809 1810 /* Append very detailed run extra attributes: */ 1811 if (evlist__add_default_attrs(evsel_list, very_detailed_attrs) < 0) 1812 return -1; 1813 1814 if (detailed_run < 3) 1815 return 0; 1816 1817 /* Append very, very detailed run extra attributes: */ 1818 return evlist__add_default_attrs(evsel_list, very_very_detailed_attrs); 1819 } 1820 1821 static const char * const stat_record_usage[] = { 1822 "perf stat record [<options>]", 1823 NULL, 1824 }; 1825 1826 static void init_features(struct perf_session *session) 1827 { 1828 int feat; 1829 1830 for (feat = HEADER_FIRST_FEATURE; feat < HEADER_LAST_FEATURE; feat++) 1831 perf_header__set_feat(&session->header, feat); 1832 1833 perf_header__clear_feat(&session->header, HEADER_DIR_FORMAT); 1834 perf_header__clear_feat(&session->header, HEADER_BUILD_ID); 1835 perf_header__clear_feat(&session->header, HEADER_TRACING_DATA); 1836 perf_header__clear_feat(&session->header, HEADER_BRANCH_STACK); 1837 perf_header__clear_feat(&session->header, HEADER_AUXTRACE); 1838 } 1839 1840 static int __cmd_record(int argc, const char **argv) 1841 { 1842 struct perf_session *session; 1843 struct perf_data *data = &perf_stat.data; 1844 1845 argc = parse_options(argc, argv, stat_options, stat_record_usage, 1846 PARSE_OPT_STOP_AT_NON_OPTION); 1847 1848 if (output_name) 1849 data->path = output_name; 1850 1851 if (stat_config.run_count != 1 || forever) { 1852 pr_err("Cannot use -r option with perf stat record.\n"); 1853 return -1; 1854 } 1855 1856 session = perf_session__new(data, false, NULL); 1857 if (IS_ERR(session)) { 1858 pr_err("Perf session creation failed\n"); 1859 return PTR_ERR(session); 1860 } 1861 1862 init_features(session); 1863 1864 session->evlist = evsel_list; 1865 perf_stat.session = session; 1866 perf_stat.record = true; 1867 return argc; 1868 } 1869 1870 static int process_stat_round_event(struct perf_session *session, 1871 union perf_event *event) 1872 { 1873 struct perf_record_stat_round *stat_round = &event->stat_round; 1874 struct evsel *counter; 1875 struct timespec tsh, *ts = NULL; 1876 const char **argv = session->header.env.cmdline_argv; 1877 int argc = session->header.env.nr_cmdline; 1878 1879 evlist__for_each_entry(evsel_list, counter) 1880 perf_stat_process_counter(&stat_config, counter); 1881 1882 if (stat_round->type == PERF_STAT_ROUND_TYPE__FINAL) 1883 update_stats(&walltime_nsecs_stats, stat_round->time); 1884 1885 if (stat_config.interval && stat_round->time) { 1886 tsh.tv_sec = stat_round->time / NSEC_PER_SEC; 1887 tsh.tv_nsec = stat_round->time % NSEC_PER_SEC; 1888 ts = &tsh; 1889 } 1890 1891 print_counters(ts, argc, argv); 1892 return 0; 1893 } 1894 1895 static 1896 int process_stat_config_event(struct perf_session *session, 1897 union perf_event *event) 1898 { 1899 struct perf_tool *tool = session->tool; 1900 struct perf_stat *st = container_of(tool, struct perf_stat, tool); 1901 1902 perf_event__read_stat_config(&stat_config, &event->stat_config); 1903 1904 if (perf_cpu_map__empty(st->cpus)) { 1905 if (st->aggr_mode != AGGR_UNSET) 1906 pr_warning("warning: processing task data, aggregation mode not set\n"); 1907 return 0; 1908 } 1909 1910 if (st->aggr_mode != AGGR_UNSET) 1911 stat_config.aggr_mode = st->aggr_mode; 1912 1913 if (perf_stat.data.is_pipe) 1914 perf_stat_init_aggr_mode(); 1915 else 1916 perf_stat_init_aggr_mode_file(st); 1917 1918 return 0; 1919 } 1920 1921 static int set_maps(struct perf_stat *st) 1922 { 1923 if (!st->cpus || !st->threads) 1924 return 0; 1925 1926 if (WARN_ONCE(st->maps_allocated, "stats double allocation\n")) 1927 return -EINVAL; 1928 1929 perf_evlist__set_maps(&evsel_list->core, st->cpus, st->threads); 1930 1931 if (perf_evlist__alloc_stats(evsel_list, true)) 1932 return -ENOMEM; 1933 1934 st->maps_allocated = true; 1935 return 0; 1936 } 1937 1938 static 1939 int process_thread_map_event(struct perf_session *session, 1940 union perf_event *event) 1941 { 1942 struct perf_tool *tool = session->tool; 1943 struct perf_stat *st = container_of(tool, struct perf_stat, tool); 1944 1945 if (st->threads) { 1946 pr_warning("Extra thread map event, ignoring.\n"); 1947 return 0; 1948 } 1949 1950 st->threads = thread_map__new_event(&event->thread_map); 1951 if (!st->threads) 1952 return -ENOMEM; 1953 1954 return set_maps(st); 1955 } 1956 1957 static 1958 int process_cpu_map_event(struct perf_session *session, 1959 union perf_event *event) 1960 { 1961 struct perf_tool *tool = session->tool; 1962 struct perf_stat *st = container_of(tool, struct perf_stat, tool); 1963 struct perf_cpu_map *cpus; 1964 1965 if (st->cpus) { 1966 pr_warning("Extra cpu map event, ignoring.\n"); 1967 return 0; 1968 } 1969 1970 cpus = cpu_map__new_data(&event->cpu_map.data); 1971 if (!cpus) 1972 return -ENOMEM; 1973 1974 st->cpus = cpus; 1975 return set_maps(st); 1976 } 1977 1978 static const char * const stat_report_usage[] = { 1979 "perf stat report [<options>]", 1980 NULL, 1981 }; 1982 1983 static struct perf_stat perf_stat = { 1984 .tool = { 1985 .attr = perf_event__process_attr, 1986 .event_update = perf_event__process_event_update, 1987 .thread_map = process_thread_map_event, 1988 .cpu_map = process_cpu_map_event, 1989 .stat_config = process_stat_config_event, 1990 .stat = perf_event__process_stat_event, 1991 .stat_round = process_stat_round_event, 1992 }, 1993 .aggr_mode = AGGR_UNSET, 1994 }; 1995 1996 static int __cmd_report(int argc, const char **argv) 1997 { 1998 struct perf_session *session; 1999 const struct option options[] = { 2000 OPT_STRING('i', "input", &input_name, "file", "input file name"), 2001 OPT_SET_UINT(0, "per-socket", &perf_stat.aggr_mode, 2002 "aggregate counts per processor socket", AGGR_SOCKET), 2003 OPT_SET_UINT(0, "per-die", &perf_stat.aggr_mode, 2004 "aggregate counts per processor die", AGGR_DIE), 2005 OPT_SET_UINT(0, "per-core", &perf_stat.aggr_mode, 2006 "aggregate counts per physical processor core", AGGR_CORE), 2007 OPT_SET_UINT(0, "per-node", &perf_stat.aggr_mode, 2008 "aggregate counts per numa node", AGGR_NODE), 2009 OPT_SET_UINT('A', "no-aggr", &perf_stat.aggr_mode, 2010 "disable CPU count aggregation", AGGR_NONE), 2011 OPT_END() 2012 }; 2013 struct stat st; 2014 int ret; 2015 2016 argc = parse_options(argc, argv, options, stat_report_usage, 0); 2017 2018 if (!input_name || !strlen(input_name)) { 2019 if (!fstat(STDIN_FILENO, &st) && S_ISFIFO(st.st_mode)) 2020 input_name = "-"; 2021 else 2022 input_name = "perf.data"; 2023 } 2024 2025 perf_stat.data.path = input_name; 2026 perf_stat.data.mode = PERF_DATA_MODE_READ; 2027 2028 session = perf_session__new(&perf_stat.data, false, &perf_stat.tool); 2029 if (IS_ERR(session)) 2030 return PTR_ERR(session); 2031 2032 perf_stat.session = session; 2033 stat_config.output = stderr; 2034 evsel_list = session->evlist; 2035 2036 ret = perf_session__process_events(session); 2037 if (ret) 2038 return ret; 2039 2040 perf_session__delete(session); 2041 return 0; 2042 } 2043 2044 static void setup_system_wide(int forks) 2045 { 2046 /* 2047 * Make system wide (-a) the default target if 2048 * no target was specified and one of following 2049 * conditions is met: 2050 * 2051 * - there's no workload specified 2052 * - there is workload specified but all requested 2053 * events are system wide events 2054 */ 2055 if (!target__none(&target)) 2056 return; 2057 2058 if (!forks) 2059 target.system_wide = true; 2060 else { 2061 struct evsel *counter; 2062 2063 evlist__for_each_entry(evsel_list, counter) { 2064 if (!counter->core.system_wide) 2065 return; 2066 } 2067 2068 if (evsel_list->core.nr_entries) 2069 target.system_wide = true; 2070 } 2071 } 2072 2073 int cmd_stat(int argc, const char **argv) 2074 { 2075 const char * const stat_usage[] = { 2076 "perf stat [<options>] [<command>]", 2077 NULL 2078 }; 2079 int status = -EINVAL, run_idx; 2080 const char *mode; 2081 FILE *output = stderr; 2082 unsigned int interval, timeout; 2083 const char * const stat_subcommands[] = { "record", "report" }; 2084 2085 setlocale(LC_ALL, ""); 2086 2087 evsel_list = evlist__new(); 2088 if (evsel_list == NULL) 2089 return -ENOMEM; 2090 2091 parse_events__shrink_config_terms(); 2092 2093 /* String-parsing callback-based options would segfault when negated */ 2094 set_option_flag(stat_options, 'e', "event", PARSE_OPT_NONEG); 2095 set_option_flag(stat_options, 'M', "metrics", PARSE_OPT_NONEG); 2096 set_option_flag(stat_options, 'G', "cgroup", PARSE_OPT_NONEG); 2097 2098 argc = parse_options_subcommand(argc, argv, stat_options, stat_subcommands, 2099 (const char **) stat_usage, 2100 PARSE_OPT_STOP_AT_NON_OPTION); 2101 perf_stat__collect_metric_expr(evsel_list); 2102 perf_stat__init_shadow_stats(); 2103 2104 if (stat_config.csv_sep) { 2105 stat_config.csv_output = true; 2106 if (!strcmp(stat_config.csv_sep, "\\t")) 2107 stat_config.csv_sep = "\t"; 2108 } else 2109 stat_config.csv_sep = DEFAULT_SEPARATOR; 2110 2111 if (argc && !strncmp(argv[0], "rec", 3)) { 2112 argc = __cmd_record(argc, argv); 2113 if (argc < 0) 2114 return -1; 2115 } else if (argc && !strncmp(argv[0], "rep", 3)) 2116 return __cmd_report(argc, argv); 2117 2118 interval = stat_config.interval; 2119 timeout = stat_config.timeout; 2120 2121 /* 2122 * For record command the -o is already taken care of. 2123 */ 2124 if (!STAT_RECORD && output_name && strcmp(output_name, "-")) 2125 output = NULL; 2126 2127 if (output_name && output_fd) { 2128 fprintf(stderr, "cannot use both --output and --log-fd\n"); 2129 parse_options_usage(stat_usage, stat_options, "o", 1); 2130 parse_options_usage(NULL, stat_options, "log-fd", 0); 2131 goto out; 2132 } 2133 2134 if (stat_config.metric_only && stat_config.aggr_mode == AGGR_THREAD) { 2135 fprintf(stderr, "--metric-only is not supported with --per-thread\n"); 2136 goto out; 2137 } 2138 2139 if (stat_config.metric_only && stat_config.run_count > 1) { 2140 fprintf(stderr, "--metric-only is not supported with -r\n"); 2141 goto out; 2142 } 2143 2144 if (stat_config.walltime_run_table && stat_config.run_count <= 1) { 2145 fprintf(stderr, "--table is only supported with -r\n"); 2146 parse_options_usage(stat_usage, stat_options, "r", 1); 2147 parse_options_usage(NULL, stat_options, "table", 0); 2148 goto out; 2149 } 2150 2151 if (output_fd < 0) { 2152 fprintf(stderr, "argument to --log-fd must be a > 0\n"); 2153 parse_options_usage(stat_usage, stat_options, "log-fd", 0); 2154 goto out; 2155 } 2156 2157 if (!output) { 2158 struct timespec tm; 2159 mode = append_file ? "a" : "w"; 2160 2161 output = fopen(output_name, mode); 2162 if (!output) { 2163 perror("failed to create output file"); 2164 return -1; 2165 } 2166 clock_gettime(CLOCK_REALTIME, &tm); 2167 fprintf(output, "# started on %s\n", ctime(&tm.tv_sec)); 2168 } else if (output_fd > 0) { 2169 mode = append_file ? "a" : "w"; 2170 output = fdopen(output_fd, mode); 2171 if (!output) { 2172 perror("Failed opening logfd"); 2173 return -errno; 2174 } 2175 } 2176 2177 stat_config.output = output; 2178 2179 /* 2180 * let the spreadsheet do the pretty-printing 2181 */ 2182 if (stat_config.csv_output) { 2183 /* User explicitly passed -B? */ 2184 if (big_num_opt == 1) { 2185 fprintf(stderr, "-B option not supported with -x\n"); 2186 parse_options_usage(stat_usage, stat_options, "B", 1); 2187 parse_options_usage(NULL, stat_options, "x", 1); 2188 goto out; 2189 } else /* Nope, so disable big number formatting */ 2190 stat_config.big_num = false; 2191 } else if (big_num_opt == 0) /* User passed --no-big-num */ 2192 stat_config.big_num = false; 2193 2194 setup_system_wide(argc); 2195 2196 /* 2197 * Display user/system times only for single 2198 * run and when there's specified tracee. 2199 */ 2200 if ((stat_config.run_count == 1) && target__none(&target)) 2201 stat_config.ru_display = true; 2202 2203 if (stat_config.run_count < 0) { 2204 pr_err("Run count must be a positive number\n"); 2205 parse_options_usage(stat_usage, stat_options, "r", 1); 2206 goto out; 2207 } else if (stat_config.run_count == 0) { 2208 forever = true; 2209 stat_config.run_count = 1; 2210 } 2211 2212 if (stat_config.walltime_run_table) { 2213 stat_config.walltime_run = zalloc(stat_config.run_count * sizeof(stat_config.walltime_run[0])); 2214 if (!stat_config.walltime_run) { 2215 pr_err("failed to setup -r option"); 2216 goto out; 2217 } 2218 } 2219 2220 if ((stat_config.aggr_mode == AGGR_THREAD) && 2221 !target__has_task(&target)) { 2222 if (!target.system_wide || target.cpu_list) { 2223 fprintf(stderr, "The --per-thread option is only " 2224 "available when monitoring via -p -t -a " 2225 "options or only --per-thread.\n"); 2226 parse_options_usage(NULL, stat_options, "p", 1); 2227 parse_options_usage(NULL, stat_options, "t", 1); 2228 goto out; 2229 } 2230 } 2231 2232 /* 2233 * no_aggr, cgroup are for system-wide only 2234 * --per-thread is aggregated per thread, we dont mix it with cpu mode 2235 */ 2236 if (((stat_config.aggr_mode != AGGR_GLOBAL && 2237 stat_config.aggr_mode != AGGR_THREAD) || nr_cgroups) && 2238 !target__has_cpu(&target)) { 2239 fprintf(stderr, "both cgroup and no-aggregation " 2240 "modes only available in system-wide mode\n"); 2241 2242 parse_options_usage(stat_usage, stat_options, "G", 1); 2243 parse_options_usage(NULL, stat_options, "A", 1); 2244 parse_options_usage(NULL, stat_options, "a", 1); 2245 goto out; 2246 } 2247 2248 if (add_default_attributes()) 2249 goto out; 2250 2251 target__validate(&target); 2252 2253 if ((stat_config.aggr_mode == AGGR_THREAD) && (target.system_wide)) 2254 target.per_thread = true; 2255 2256 if (perf_evlist__create_maps(evsel_list, &target) < 0) { 2257 if (target__has_task(&target)) { 2258 pr_err("Problems finding threads of monitor\n"); 2259 parse_options_usage(stat_usage, stat_options, "p", 1); 2260 parse_options_usage(NULL, stat_options, "t", 1); 2261 } else if (target__has_cpu(&target)) { 2262 perror("failed to parse CPUs map"); 2263 parse_options_usage(stat_usage, stat_options, "C", 1); 2264 parse_options_usage(NULL, stat_options, "a", 1); 2265 } 2266 goto out; 2267 } 2268 2269 evlist__check_cpu_maps(evsel_list); 2270 2271 /* 2272 * Initialize thread_map with comm names, 2273 * so we could print it out on output. 2274 */ 2275 if (stat_config.aggr_mode == AGGR_THREAD) { 2276 thread_map__read_comms(evsel_list->core.threads); 2277 if (target.system_wide) { 2278 if (runtime_stat_new(&stat_config, 2279 perf_thread_map__nr(evsel_list->core.threads))) { 2280 goto out; 2281 } 2282 } 2283 } 2284 2285 if (stat_config.aggr_mode == AGGR_NODE) 2286 cpu__setup_cpunode_map(); 2287 2288 if (stat_config.times && interval) 2289 interval_count = true; 2290 else if (stat_config.times && !interval) { 2291 pr_err("interval-count option should be used together with " 2292 "interval-print.\n"); 2293 parse_options_usage(stat_usage, stat_options, "interval-count", 0); 2294 parse_options_usage(stat_usage, stat_options, "I", 1); 2295 goto out; 2296 } 2297 2298 if (timeout && timeout < 100) { 2299 if (timeout < 10) { 2300 pr_err("timeout must be >= 10ms.\n"); 2301 parse_options_usage(stat_usage, stat_options, "timeout", 0); 2302 goto out; 2303 } else 2304 pr_warning("timeout < 100ms. " 2305 "The overhead percentage could be high in some cases. " 2306 "Please proceed with caution.\n"); 2307 } 2308 if (timeout && interval) { 2309 pr_err("timeout option is not supported with interval-print.\n"); 2310 parse_options_usage(stat_usage, stat_options, "timeout", 0); 2311 parse_options_usage(stat_usage, stat_options, "I", 1); 2312 goto out; 2313 } 2314 2315 if (perf_evlist__alloc_stats(evsel_list, interval)) 2316 goto out; 2317 2318 if (perf_stat_init_aggr_mode()) 2319 goto out; 2320 2321 /* 2322 * Set sample_type to PERF_SAMPLE_IDENTIFIER, which should be harmless 2323 * while avoiding that older tools show confusing messages. 2324 * 2325 * However for pipe sessions we need to keep it zero, 2326 * because script's perf_evsel__check_attr is triggered 2327 * by attr->sample_type != 0, and we can't run it on 2328 * stat sessions. 2329 */ 2330 stat_config.identifier = !(STAT_RECORD && perf_stat.data.is_pipe); 2331 2332 /* 2333 * We dont want to block the signals - that would cause 2334 * child tasks to inherit that and Ctrl-C would not work. 2335 * What we want is for Ctrl-C to work in the exec()-ed 2336 * task, but being ignored by perf stat itself: 2337 */ 2338 atexit(sig_atexit); 2339 if (!forever) 2340 signal(SIGINT, skip_signal); 2341 signal(SIGCHLD, skip_signal); 2342 signal(SIGALRM, skip_signal); 2343 signal(SIGABRT, skip_signal); 2344 2345 if (evlist__initialize_ctlfd(evsel_list, stat_config.ctl_fd, stat_config.ctl_fd_ack)) 2346 goto out; 2347 2348 status = 0; 2349 for (run_idx = 0; forever || run_idx < stat_config.run_count; run_idx++) { 2350 if (stat_config.run_count != 1 && verbose > 0) 2351 fprintf(output, "[ perf stat: executing run #%d ... ]\n", 2352 run_idx + 1); 2353 2354 if (run_idx != 0) 2355 perf_evlist__reset_prev_raw_counts(evsel_list); 2356 2357 status = run_perf_stat(argc, argv, run_idx); 2358 if (forever && status != -1 && !interval) { 2359 print_counters(NULL, argc, argv); 2360 perf_stat__reset_stats(); 2361 } 2362 } 2363 2364 if (!forever && status != -1 && (!interval || stat_config.summary)) 2365 print_counters(NULL, argc, argv); 2366 2367 evlist__finalize_ctlfd(evsel_list); 2368 2369 if (STAT_RECORD) { 2370 /* 2371 * We synthesize the kernel mmap record just so that older tools 2372 * don't emit warnings about not being able to resolve symbols 2373 * due to /proc/sys/kernel/kptr_restrict settings and instear provide 2374 * a saner message about no samples being in the perf.data file. 2375 * 2376 * This also serves to suppress a warning about f_header.data.size == 0 2377 * in header.c at the moment 'perf stat record' gets introduced, which 2378 * is not really needed once we start adding the stat specific PERF_RECORD_ 2379 * records, but the need to suppress the kptr_restrict messages in older 2380 * tools remain -acme 2381 */ 2382 int fd = perf_data__fd(&perf_stat.data); 2383 int err = perf_event__synthesize_kernel_mmap((void *)&perf_stat, 2384 process_synthesized_event, 2385 &perf_stat.session->machines.host); 2386 if (err) { 2387 pr_warning("Couldn't synthesize the kernel mmap record, harmless, " 2388 "older tools may produce warnings about this file\n."); 2389 } 2390 2391 if (!interval) { 2392 if (WRITE_STAT_ROUND_EVENT(walltime_nsecs_stats.max, FINAL)) 2393 pr_err("failed to write stat round event\n"); 2394 } 2395 2396 if (!perf_stat.data.is_pipe) { 2397 perf_stat.session->header.data_size += perf_stat.bytes_written; 2398 perf_session__write_header(perf_stat.session, evsel_list, fd, true); 2399 } 2400 2401 evlist__close(evsel_list); 2402 perf_session__delete(perf_stat.session); 2403 } 2404 2405 perf_stat__exit_aggr_mode(); 2406 perf_evlist__free_stats(evsel_list); 2407 out: 2408 zfree(&stat_config.walltime_run); 2409 2410 if (smi_cost && smi_reset) 2411 sysfs__write_int(FREEZE_ON_SMI_PATH, 0); 2412 2413 evlist__delete(evsel_list); 2414 2415 metricgroup__rblist_exit(&stat_config.metric_events); 2416 runtime_stat_delete(&stat_config); 2417 2418 return status; 2419 } 2420