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 "asm/bug.h" 70 71 #include <linux/time64.h> 72 #include <linux/zalloc.h> 73 #include <api/fs/fs.h> 74 #include <errno.h> 75 #include <signal.h> 76 #include <stdlib.h> 77 #include <sys/prctl.h> 78 #include <inttypes.h> 79 #include <locale.h> 80 #include <math.h> 81 #include <sys/types.h> 82 #include <sys/stat.h> 83 #include <sys/wait.h> 84 #include <unistd.h> 85 #include <sys/time.h> 86 #include <sys/resource.h> 87 #include <linux/err.h> 88 89 #include <linux/ctype.h> 90 #include <perf/evlist.h> 91 92 #define DEFAULT_SEPARATOR " " 93 #define FREEZE_ON_SMI_PATH "devices/cpu/freeze_on_smi" 94 95 static void print_counters(struct timespec *ts, int argc, const char **argv); 96 97 /* Default events used for perf stat -T */ 98 static const char *transaction_attrs = { 99 "task-clock," 100 "{" 101 "instructions," 102 "cycles," 103 "cpu/cycles-t/," 104 "cpu/tx-start/," 105 "cpu/el-start/," 106 "cpu/cycles-ct/" 107 "}" 108 }; 109 110 /* More limited version when the CPU does not have all events. */ 111 static const char * transaction_limited_attrs = { 112 "task-clock," 113 "{" 114 "instructions," 115 "cycles," 116 "cpu/cycles-t/," 117 "cpu/tx-start/" 118 "}" 119 }; 120 121 static const char * topdown_attrs[] = { 122 "topdown-total-slots", 123 "topdown-slots-retired", 124 "topdown-recovery-bubbles", 125 "topdown-fetch-bubbles", 126 "topdown-slots-issued", 127 NULL, 128 }; 129 130 static const char *smi_cost_attrs = { 131 "{" 132 "msr/aperf/," 133 "msr/smi/," 134 "cycles" 135 "}" 136 }; 137 138 static struct evlist *evsel_list; 139 140 static struct target target = { 141 .uid = UINT_MAX, 142 }; 143 144 #define METRIC_ONLY_LEN 20 145 146 static volatile pid_t child_pid = -1; 147 static int detailed_run = 0; 148 static bool transaction_run; 149 static bool topdown_run = false; 150 static bool smi_cost = false; 151 static bool smi_reset = false; 152 static int big_num_opt = -1; 153 static bool group = false; 154 static const char *pre_cmd = NULL; 155 static const char *post_cmd = NULL; 156 static bool sync_run = false; 157 static bool forever = false; 158 static bool force_metric_only = false; 159 static struct timespec ref_time; 160 static bool append_file; 161 static bool interval_count; 162 static const char *output_name; 163 static int output_fd; 164 165 struct perf_stat { 166 bool record; 167 struct perf_data data; 168 struct perf_session *session; 169 u64 bytes_written; 170 struct perf_tool tool; 171 bool maps_allocated; 172 struct perf_cpu_map *cpus; 173 struct perf_thread_map *threads; 174 enum aggr_mode aggr_mode; 175 }; 176 177 static struct perf_stat perf_stat; 178 #define STAT_RECORD perf_stat.record 179 180 static volatile int done = 0; 181 182 static struct perf_stat_config stat_config = { 183 .aggr_mode = AGGR_GLOBAL, 184 .scale = true, 185 .unit_width = 4, /* strlen("unit") */ 186 .run_count = 1, 187 .metric_only_len = METRIC_ONLY_LEN, 188 .walltime_nsecs_stats = &walltime_nsecs_stats, 189 .big_num = true, 190 }; 191 192 static inline void diff_timespec(struct timespec *r, struct timespec *a, 193 struct timespec *b) 194 { 195 r->tv_sec = a->tv_sec - b->tv_sec; 196 if (a->tv_nsec < b->tv_nsec) { 197 r->tv_nsec = a->tv_nsec + NSEC_PER_SEC - b->tv_nsec; 198 r->tv_sec--; 199 } else { 200 r->tv_nsec = a->tv_nsec - b->tv_nsec ; 201 } 202 } 203 204 static void perf_stat__reset_stats(void) 205 { 206 int i; 207 208 perf_evlist__reset_stats(evsel_list); 209 perf_stat__reset_shadow_stats(); 210 211 for (i = 0; i < stat_config.stats_num; i++) 212 perf_stat__reset_shadow_per_stat(&stat_config.stats[i]); 213 } 214 215 static int process_synthesized_event(struct perf_tool *tool __maybe_unused, 216 union perf_event *event, 217 struct perf_sample *sample __maybe_unused, 218 struct machine *machine __maybe_unused) 219 { 220 if (perf_data__write(&perf_stat.data, event, event->header.size) < 0) { 221 pr_err("failed to write perf data, error: %m\n"); 222 return -1; 223 } 224 225 perf_stat.bytes_written += event->header.size; 226 return 0; 227 } 228 229 static int write_stat_round_event(u64 tm, u64 type) 230 { 231 return perf_event__synthesize_stat_round(NULL, tm, type, 232 process_synthesized_event, 233 NULL); 234 } 235 236 #define WRITE_STAT_ROUND_EVENT(time, interval) \ 237 write_stat_round_event(time, PERF_STAT_ROUND_TYPE__ ## interval) 238 239 #define SID(e, x, y) xyarray__entry(e->core.sample_id, x, y) 240 241 static int 242 perf_evsel__write_stat_event(struct evsel *counter, u32 cpu, u32 thread, 243 struct perf_counts_values *count) 244 { 245 struct perf_sample_id *sid = SID(counter, cpu, thread); 246 247 return perf_event__synthesize_stat(NULL, cpu, thread, sid->id, count, 248 process_synthesized_event, NULL); 249 } 250 251 static int read_single_counter(struct evsel *counter, int cpu, 252 int thread, struct timespec *rs) 253 { 254 if (counter->tool_event == PERF_TOOL_DURATION_TIME) { 255 u64 val = rs->tv_nsec + rs->tv_sec*1000000000ULL; 256 struct perf_counts_values *count = 257 perf_counts(counter->counts, cpu, thread); 258 count->ena = count->run = val; 259 count->val = val; 260 return 0; 261 } 262 return perf_evsel__read_counter(counter, cpu, thread); 263 } 264 265 /* 266 * Read out the results of a single counter: 267 * do not aggregate counts across CPUs in system-wide mode 268 */ 269 static int read_counter_cpu(struct evsel *counter, struct timespec *rs, int cpu) 270 { 271 int nthreads = perf_thread_map__nr(evsel_list->core.threads); 272 int thread; 273 274 if (!counter->supported) 275 return -ENOENT; 276 277 if (counter->core.system_wide) 278 nthreads = 1; 279 280 for (thread = 0; thread < nthreads; thread++) { 281 struct perf_counts_values *count; 282 283 count = perf_counts(counter->counts, cpu, thread); 284 285 /* 286 * The leader's group read loads data into its group members 287 * (via perf_evsel__read_counter()) and sets their count->loaded. 288 */ 289 if (!perf_counts__is_loaded(counter->counts, cpu, thread) && 290 read_single_counter(counter, cpu, thread, rs)) { 291 counter->counts->scaled = -1; 292 perf_counts(counter->counts, cpu, thread)->ena = 0; 293 perf_counts(counter->counts, cpu, thread)->run = 0; 294 return -1; 295 } 296 297 perf_counts__set_loaded(counter->counts, cpu, thread, false); 298 299 if (STAT_RECORD) { 300 if (perf_evsel__write_stat_event(counter, cpu, thread, count)) { 301 pr_err("failed to write stat event\n"); 302 return -1; 303 } 304 } 305 306 if (verbose > 1) { 307 fprintf(stat_config.output, 308 "%s: %d: %" PRIu64 " %" PRIu64 " %" PRIu64 "\n", 309 perf_evsel__name(counter), 310 cpu, 311 count->val, count->ena, count->run); 312 } 313 } 314 315 return 0; 316 } 317 318 static void read_counters(struct timespec *rs) 319 { 320 struct evsel *counter; 321 struct affinity affinity; 322 int i, ncpus, cpu; 323 324 if (affinity__setup(&affinity) < 0) 325 return; 326 327 ncpus = perf_cpu_map__nr(evsel_list->core.all_cpus); 328 if (!target__has_cpu(&target) || target__has_per_thread(&target)) 329 ncpus = 1; 330 evlist__for_each_cpu(evsel_list, i, cpu) { 331 if (i >= ncpus) 332 break; 333 affinity__set(&affinity, cpu); 334 335 evlist__for_each_entry(evsel_list, counter) { 336 if (evsel__cpu_iter_skip(counter, cpu)) 337 continue; 338 if (!counter->err) { 339 counter->err = read_counter_cpu(counter, rs, 340 counter->cpu_iter - 1); 341 } 342 } 343 } 344 affinity__cleanup(&affinity); 345 346 evlist__for_each_entry(evsel_list, counter) { 347 if (counter->err) 348 pr_debug("failed to read counter %s\n", counter->name); 349 if (counter->err == 0 && perf_stat_process_counter(&stat_config, counter)) 350 pr_warning("failed to process counter %s\n", counter->name); 351 counter->err = 0; 352 } 353 } 354 355 static void process_interval(void) 356 { 357 struct timespec ts, rs; 358 359 clock_gettime(CLOCK_MONOTONIC, &ts); 360 diff_timespec(&rs, &ts, &ref_time); 361 362 read_counters(&rs); 363 364 if (STAT_RECORD) { 365 if (WRITE_STAT_ROUND_EVENT(rs.tv_sec * NSEC_PER_SEC + rs.tv_nsec, INTERVAL)) 366 pr_err("failed to write stat round event\n"); 367 } 368 369 init_stats(&walltime_nsecs_stats); 370 update_stats(&walltime_nsecs_stats, stat_config.interval * 1000000); 371 print_counters(&rs, 0, NULL); 372 } 373 374 static void enable_counters(void) 375 { 376 if (stat_config.initial_delay) 377 usleep(stat_config.initial_delay * USEC_PER_MSEC); 378 379 /* 380 * We need to enable counters only if: 381 * - we don't have tracee (attaching to task or cpu) 382 * - we have initial delay configured 383 */ 384 if (!target__none(&target) || stat_config.initial_delay) 385 evlist__enable(evsel_list); 386 } 387 388 static void disable_counters(void) 389 { 390 /* 391 * If we don't have tracee (attaching to task or cpu), counters may 392 * still be running. To get accurate group ratios, we must stop groups 393 * from counting before reading their constituent counters. 394 */ 395 if (!target__none(&target)) 396 evlist__disable(evsel_list); 397 } 398 399 static volatile int workload_exec_errno; 400 401 /* 402 * perf_evlist__prepare_workload will send a SIGUSR1 403 * if the fork fails, since we asked by setting its 404 * want_signal to true. 405 */ 406 static void workload_exec_failed_signal(int signo __maybe_unused, siginfo_t *info, 407 void *ucontext __maybe_unused) 408 { 409 workload_exec_errno = info->si_value.sival_int; 410 } 411 412 static bool perf_evsel__should_store_id(struct evsel *counter) 413 { 414 return STAT_RECORD || counter->core.attr.read_format & PERF_FORMAT_ID; 415 } 416 417 static bool is_target_alive(struct target *_target, 418 struct perf_thread_map *threads) 419 { 420 struct stat st; 421 int i; 422 423 if (!target__has_task(_target)) 424 return true; 425 426 for (i = 0; i < threads->nr; i++) { 427 char path[PATH_MAX]; 428 429 scnprintf(path, PATH_MAX, "%s/%d", procfs__mountpoint(), 430 threads->map[i].pid); 431 432 if (!stat(path, &st)) 433 return true; 434 } 435 436 return false; 437 } 438 439 enum counter_recovery { 440 COUNTER_SKIP, 441 COUNTER_RETRY, 442 COUNTER_FATAL, 443 }; 444 445 static enum counter_recovery stat_handle_error(struct evsel *counter) 446 { 447 char msg[BUFSIZ]; 448 /* 449 * PPC returns ENXIO for HW counters until 2.6.37 450 * (behavior changed with commit b0a873e). 451 */ 452 if (errno == EINVAL || errno == ENOSYS || 453 errno == ENOENT || errno == EOPNOTSUPP || 454 errno == ENXIO) { 455 if (verbose > 0) 456 ui__warning("%s event is not supported by the kernel.\n", 457 perf_evsel__name(counter)); 458 counter->supported = false; 459 /* 460 * errored is a sticky flag that means one of the counter's 461 * cpu event had a problem and needs to be reexamined. 462 */ 463 counter->errored = true; 464 465 if ((counter->leader != counter) || 466 !(counter->leader->core.nr_members > 1)) 467 return COUNTER_SKIP; 468 } else if (perf_evsel__fallback(counter, errno, msg, sizeof(msg))) { 469 if (verbose > 0) 470 ui__warning("%s\n", msg); 471 return COUNTER_RETRY; 472 } else if (target__has_per_thread(&target) && 473 evsel_list->core.threads && 474 evsel_list->core.threads->err_thread != -1) { 475 /* 476 * For global --per-thread case, skip current 477 * error thread. 478 */ 479 if (!thread_map__remove(evsel_list->core.threads, 480 evsel_list->core.threads->err_thread)) { 481 evsel_list->core.threads->err_thread = -1; 482 return COUNTER_RETRY; 483 } 484 } 485 486 perf_evsel__open_strerror(counter, &target, 487 errno, msg, sizeof(msg)); 488 ui__error("%s\n", msg); 489 490 if (child_pid != -1) 491 kill(child_pid, SIGTERM); 492 return COUNTER_FATAL; 493 } 494 495 static int __run_perf_stat(int argc, const char **argv, int run_idx) 496 { 497 int interval = stat_config.interval; 498 int times = stat_config.times; 499 int timeout = stat_config.timeout; 500 char msg[BUFSIZ]; 501 unsigned long long t0, t1; 502 struct evsel *counter; 503 struct timespec ts; 504 size_t l; 505 int status = 0; 506 const bool forks = (argc > 0); 507 bool is_pipe = STAT_RECORD ? perf_stat.data.is_pipe : false; 508 struct affinity affinity; 509 int i, cpu; 510 bool second_pass = false; 511 512 if (interval) { 513 ts.tv_sec = interval / USEC_PER_MSEC; 514 ts.tv_nsec = (interval % USEC_PER_MSEC) * NSEC_PER_MSEC; 515 } else if (timeout) { 516 ts.tv_sec = timeout / USEC_PER_MSEC; 517 ts.tv_nsec = (timeout % USEC_PER_MSEC) * NSEC_PER_MSEC; 518 } else { 519 ts.tv_sec = 1; 520 ts.tv_nsec = 0; 521 } 522 523 if (forks) { 524 if (perf_evlist__prepare_workload(evsel_list, &target, argv, is_pipe, 525 workload_exec_failed_signal) < 0) { 526 perror("failed to prepare workload"); 527 return -1; 528 } 529 child_pid = evsel_list->workload.pid; 530 } 531 532 if (group) 533 perf_evlist__set_leader(evsel_list); 534 535 if (affinity__setup(&affinity) < 0) 536 return -1; 537 538 evlist__for_each_cpu (evsel_list, i, cpu) { 539 affinity__set(&affinity, cpu); 540 541 evlist__for_each_entry(evsel_list, counter) { 542 if (evsel__cpu_iter_skip(counter, cpu)) 543 continue; 544 if (counter->reset_group || counter->errored) 545 continue; 546 try_again: 547 if (create_perf_stat_counter(counter, &stat_config, &target, 548 counter->cpu_iter - 1) < 0) { 549 550 /* 551 * Weak group failed. We cannot just undo this here 552 * because earlier CPUs might be in group mode, and the kernel 553 * doesn't support mixing group and non group reads. Defer 554 * it to later. 555 * Don't close here because we're in the wrong affinity. 556 */ 557 if ((errno == EINVAL || errno == EBADF) && 558 counter->leader != counter && 559 counter->weak_group) { 560 perf_evlist__reset_weak_group(evsel_list, counter, false); 561 assert(counter->reset_group); 562 second_pass = true; 563 continue; 564 } 565 566 switch (stat_handle_error(counter)) { 567 case COUNTER_FATAL: 568 return -1; 569 case COUNTER_RETRY: 570 goto try_again; 571 case COUNTER_SKIP: 572 continue; 573 default: 574 break; 575 } 576 577 } 578 counter->supported = true; 579 } 580 } 581 582 if (second_pass) { 583 /* 584 * Now redo all the weak group after closing them, 585 * and also close errored counters. 586 */ 587 588 evlist__for_each_cpu(evsel_list, i, cpu) { 589 affinity__set(&affinity, cpu); 590 /* First close errored or weak retry */ 591 evlist__for_each_entry(evsel_list, counter) { 592 if (!counter->reset_group && !counter->errored) 593 continue; 594 if (evsel__cpu_iter_skip_no_inc(counter, cpu)) 595 continue; 596 perf_evsel__close_cpu(&counter->core, counter->cpu_iter); 597 } 598 /* Now reopen weak */ 599 evlist__for_each_entry(evsel_list, counter) { 600 if (!counter->reset_group && !counter->errored) 601 continue; 602 if (evsel__cpu_iter_skip(counter, cpu)) 603 continue; 604 if (!counter->reset_group) 605 continue; 606 try_again_reset: 607 pr_debug2("reopening weak %s\n", perf_evsel__name(counter)); 608 if (create_perf_stat_counter(counter, &stat_config, &target, 609 counter->cpu_iter - 1) < 0) { 610 611 switch (stat_handle_error(counter)) { 612 case COUNTER_FATAL: 613 return -1; 614 case COUNTER_RETRY: 615 goto try_again_reset; 616 case COUNTER_SKIP: 617 continue; 618 default: 619 break; 620 } 621 } 622 counter->supported = true; 623 } 624 } 625 } 626 affinity__cleanup(&affinity); 627 628 evlist__for_each_entry(evsel_list, counter) { 629 if (!counter->supported) { 630 perf_evsel__free_fd(&counter->core); 631 continue; 632 } 633 634 l = strlen(counter->unit); 635 if (l > stat_config.unit_width) 636 stat_config.unit_width = l; 637 638 if (perf_evsel__should_store_id(counter) && 639 perf_evsel__store_ids(counter, evsel_list)) 640 return -1; 641 } 642 643 if (perf_evlist__apply_filters(evsel_list, &counter)) { 644 pr_err("failed to set filter \"%s\" on event %s with %d (%s)\n", 645 counter->filter, perf_evsel__name(counter), errno, 646 str_error_r(errno, msg, sizeof(msg))); 647 return -1; 648 } 649 650 if (STAT_RECORD) { 651 int err, fd = perf_data__fd(&perf_stat.data); 652 653 if (is_pipe) { 654 err = perf_header__write_pipe(perf_data__fd(&perf_stat.data)); 655 } else { 656 err = perf_session__write_header(perf_stat.session, evsel_list, 657 fd, false); 658 } 659 660 if (err < 0) 661 return err; 662 663 err = perf_event__synthesize_stat_events(&stat_config, NULL, evsel_list, 664 process_synthesized_event, is_pipe); 665 if (err < 0) 666 return err; 667 } 668 669 /* 670 * Enable counters and exec the command: 671 */ 672 t0 = rdclock(); 673 clock_gettime(CLOCK_MONOTONIC, &ref_time); 674 675 if (forks) { 676 perf_evlist__start_workload(evsel_list); 677 enable_counters(); 678 679 if (interval || timeout) { 680 while (!waitpid(child_pid, &status, WNOHANG)) { 681 nanosleep(&ts, NULL); 682 if (timeout) 683 break; 684 process_interval(); 685 if (interval_count && !(--times)) 686 break; 687 } 688 } 689 if (child_pid != -1) 690 wait4(child_pid, &status, 0, &stat_config.ru_data); 691 692 if (workload_exec_errno) { 693 const char *emsg = str_error_r(workload_exec_errno, msg, sizeof(msg)); 694 pr_err("Workload failed: %s\n", emsg); 695 return -1; 696 } 697 698 if (WIFSIGNALED(status)) 699 psignal(WTERMSIG(status), argv[0]); 700 } else { 701 enable_counters(); 702 while (!done) { 703 nanosleep(&ts, NULL); 704 if (!is_target_alive(&target, evsel_list->core.threads)) 705 break; 706 if (timeout) 707 break; 708 if (interval) { 709 process_interval(); 710 if (interval_count && !(--times)) 711 break; 712 } 713 } 714 } 715 716 disable_counters(); 717 718 t1 = rdclock(); 719 720 if (stat_config.walltime_run_table) 721 stat_config.walltime_run[run_idx] = t1 - t0; 722 723 update_stats(&walltime_nsecs_stats, t1 - t0); 724 725 /* 726 * Closing a group leader splits the group, and as we only disable 727 * group leaders, results in remaining events becoming enabled. To 728 * avoid arbitrary skew, we must read all counters before closing any 729 * group leaders. 730 */ 731 read_counters(&(struct timespec) { .tv_nsec = t1-t0 }); 732 733 /* 734 * We need to keep evsel_list alive, because it's processed 735 * later the evsel_list will be closed after. 736 */ 737 if (!STAT_RECORD) 738 evlist__close(evsel_list); 739 740 return WEXITSTATUS(status); 741 } 742 743 static int run_perf_stat(int argc, const char **argv, int run_idx) 744 { 745 int ret; 746 747 if (pre_cmd) { 748 ret = system(pre_cmd); 749 if (ret) 750 return ret; 751 } 752 753 if (sync_run) 754 sync(); 755 756 ret = __run_perf_stat(argc, argv, run_idx); 757 if (ret) 758 return ret; 759 760 if (post_cmd) { 761 ret = system(post_cmd); 762 if (ret) 763 return ret; 764 } 765 766 return ret; 767 } 768 769 static void print_counters(struct timespec *ts, int argc, const char **argv) 770 { 771 /* Do not print anything if we record to the pipe. */ 772 if (STAT_RECORD && perf_stat.data.is_pipe) 773 return; 774 775 perf_evlist__print_counters(evsel_list, &stat_config, &target, 776 ts, argc, argv); 777 } 778 779 static volatile int signr = -1; 780 781 static void skip_signal(int signo) 782 { 783 if ((child_pid == -1) || stat_config.interval) 784 done = 1; 785 786 signr = signo; 787 /* 788 * render child_pid harmless 789 * won't send SIGTERM to a random 790 * process in case of race condition 791 * and fast PID recycling 792 */ 793 child_pid = -1; 794 } 795 796 static void sig_atexit(void) 797 { 798 sigset_t set, oset; 799 800 /* 801 * avoid race condition with SIGCHLD handler 802 * in skip_signal() which is modifying child_pid 803 * goal is to avoid send SIGTERM to a random 804 * process 805 */ 806 sigemptyset(&set); 807 sigaddset(&set, SIGCHLD); 808 sigprocmask(SIG_BLOCK, &set, &oset); 809 810 if (child_pid != -1) 811 kill(child_pid, SIGTERM); 812 813 sigprocmask(SIG_SETMASK, &oset, NULL); 814 815 if (signr == -1) 816 return; 817 818 signal(signr, SIG_DFL); 819 kill(getpid(), signr); 820 } 821 822 static int stat__set_big_num(const struct option *opt __maybe_unused, 823 const char *s __maybe_unused, int unset) 824 { 825 big_num_opt = unset ? 0 : 1; 826 return 0; 827 } 828 829 static int enable_metric_only(const struct option *opt __maybe_unused, 830 const char *s __maybe_unused, int unset) 831 { 832 force_metric_only = true; 833 stat_config.metric_only = !unset; 834 return 0; 835 } 836 837 static int parse_metric_groups(const struct option *opt, 838 const char *str, 839 int unset __maybe_unused) 840 { 841 return metricgroup__parse_groups(opt, str, &stat_config.metric_events); 842 } 843 844 static struct option stat_options[] = { 845 OPT_BOOLEAN('T', "transaction", &transaction_run, 846 "hardware transaction statistics"), 847 OPT_CALLBACK('e', "event", &evsel_list, "event", 848 "event selector. use 'perf list' to list available events", 849 parse_events_option), 850 OPT_CALLBACK(0, "filter", &evsel_list, "filter", 851 "event filter", parse_filter), 852 OPT_BOOLEAN('i', "no-inherit", &stat_config.no_inherit, 853 "child tasks do not inherit counters"), 854 OPT_STRING('p', "pid", &target.pid, "pid", 855 "stat events on existing process id"), 856 OPT_STRING('t', "tid", &target.tid, "tid", 857 "stat events on existing thread id"), 858 OPT_BOOLEAN('a', "all-cpus", &target.system_wide, 859 "system-wide collection from all CPUs"), 860 OPT_BOOLEAN('g', "group", &group, 861 "put the counters into a counter group"), 862 OPT_BOOLEAN(0, "scale", &stat_config.scale, 863 "Use --no-scale to disable counter scaling for multiplexing"), 864 OPT_INCR('v', "verbose", &verbose, 865 "be more verbose (show counter open errors, etc)"), 866 OPT_INTEGER('r', "repeat", &stat_config.run_count, 867 "repeat command and print average + stddev (max: 100, forever: 0)"), 868 OPT_BOOLEAN(0, "table", &stat_config.walltime_run_table, 869 "display details about each run (only with -r option)"), 870 OPT_BOOLEAN('n', "null", &stat_config.null_run, 871 "null run - dont start any counters"), 872 OPT_INCR('d', "detailed", &detailed_run, 873 "detailed run - start a lot of events"), 874 OPT_BOOLEAN('S', "sync", &sync_run, 875 "call sync() before starting a run"), 876 OPT_CALLBACK_NOOPT('B', "big-num", NULL, NULL, 877 "print large numbers with thousands\' separators", 878 stat__set_big_num), 879 OPT_STRING('C', "cpu", &target.cpu_list, "cpu", 880 "list of cpus to monitor in system-wide"), 881 OPT_SET_UINT('A', "no-aggr", &stat_config.aggr_mode, 882 "disable CPU count aggregation", AGGR_NONE), 883 OPT_BOOLEAN(0, "no-merge", &stat_config.no_merge, "Do not merge identical named events"), 884 OPT_STRING('x', "field-separator", &stat_config.csv_sep, "separator", 885 "print counts with custom separator"), 886 OPT_CALLBACK('G', "cgroup", &evsel_list, "name", 887 "monitor event in cgroup name only", parse_cgroups), 888 OPT_STRING('o', "output", &output_name, "file", "output file name"), 889 OPT_BOOLEAN(0, "append", &append_file, "append to the output file"), 890 OPT_INTEGER(0, "log-fd", &output_fd, 891 "log output to fd, instead of stderr"), 892 OPT_STRING(0, "pre", &pre_cmd, "command", 893 "command to run prior to the measured command"), 894 OPT_STRING(0, "post", &post_cmd, "command", 895 "command to run after to the measured command"), 896 OPT_UINTEGER('I', "interval-print", &stat_config.interval, 897 "print counts at regular interval in ms " 898 "(overhead is possible for values <= 100ms)"), 899 OPT_INTEGER(0, "interval-count", &stat_config.times, 900 "print counts for fixed number of times"), 901 OPT_BOOLEAN(0, "interval-clear", &stat_config.interval_clear, 902 "clear screen in between new interval"), 903 OPT_UINTEGER(0, "timeout", &stat_config.timeout, 904 "stop workload and print counts after a timeout period in ms (>= 10ms)"), 905 OPT_SET_UINT(0, "per-socket", &stat_config.aggr_mode, 906 "aggregate counts per processor socket", AGGR_SOCKET), 907 OPT_SET_UINT(0, "per-die", &stat_config.aggr_mode, 908 "aggregate counts per processor die", AGGR_DIE), 909 OPT_SET_UINT(0, "per-core", &stat_config.aggr_mode, 910 "aggregate counts per physical processor core", AGGR_CORE), 911 OPT_SET_UINT(0, "per-thread", &stat_config.aggr_mode, 912 "aggregate counts per thread", AGGR_THREAD), 913 OPT_SET_UINT(0, "per-node", &stat_config.aggr_mode, 914 "aggregate counts per numa node", AGGR_NODE), 915 OPT_UINTEGER('D', "delay", &stat_config.initial_delay, 916 "ms to wait before starting measurement after program start"), 917 OPT_CALLBACK_NOOPT(0, "metric-only", &stat_config.metric_only, NULL, 918 "Only print computed metrics. No raw values", enable_metric_only), 919 OPT_BOOLEAN(0, "topdown", &topdown_run, 920 "measure topdown level 1 statistics"), 921 OPT_BOOLEAN(0, "smi-cost", &smi_cost, 922 "measure SMI cost"), 923 OPT_CALLBACK('M', "metrics", &evsel_list, "metric/metric group list", 924 "monitor specified metrics or metric groups (separated by ,)", 925 parse_metric_groups), 926 OPT_BOOLEAN_FLAG(0, "all-kernel", &stat_config.all_kernel, 927 "Configure all used events to run in kernel space.", 928 PARSE_OPT_EXCLUSIVE), 929 OPT_BOOLEAN_FLAG(0, "all-user", &stat_config.all_user, 930 "Configure all used events to run in user space.", 931 PARSE_OPT_EXCLUSIVE), 932 OPT_BOOLEAN(0, "percore-show-thread", &stat_config.percore_show_thread, 933 "Use with 'percore' event qualifier to show the event " 934 "counts of one hardware thread by sum up total hardware " 935 "threads of same physical core"), 936 OPT_END() 937 }; 938 939 static int perf_stat__get_socket(struct perf_stat_config *config __maybe_unused, 940 struct perf_cpu_map *map, int cpu) 941 { 942 return cpu_map__get_socket(map, cpu, NULL); 943 } 944 945 static int perf_stat__get_die(struct perf_stat_config *config __maybe_unused, 946 struct perf_cpu_map *map, int cpu) 947 { 948 return cpu_map__get_die(map, cpu, NULL); 949 } 950 951 static int perf_stat__get_core(struct perf_stat_config *config __maybe_unused, 952 struct perf_cpu_map *map, int cpu) 953 { 954 return cpu_map__get_core(map, cpu, NULL); 955 } 956 957 static int perf_stat__get_node(struct perf_stat_config *config __maybe_unused, 958 struct perf_cpu_map *map, int cpu) 959 { 960 return cpu_map__get_node(map, cpu, NULL); 961 } 962 963 static int perf_stat__get_aggr(struct perf_stat_config *config, 964 aggr_get_id_t get_id, struct perf_cpu_map *map, int idx) 965 { 966 int cpu; 967 968 if (idx >= map->nr) 969 return -1; 970 971 cpu = map->map[idx]; 972 973 if (config->cpus_aggr_map->map[cpu] == -1) 974 config->cpus_aggr_map->map[cpu] = get_id(config, map, idx); 975 976 return config->cpus_aggr_map->map[cpu]; 977 } 978 979 static int perf_stat__get_socket_cached(struct perf_stat_config *config, 980 struct perf_cpu_map *map, int idx) 981 { 982 return perf_stat__get_aggr(config, perf_stat__get_socket, map, idx); 983 } 984 985 static int perf_stat__get_die_cached(struct perf_stat_config *config, 986 struct perf_cpu_map *map, int idx) 987 { 988 return perf_stat__get_aggr(config, perf_stat__get_die, map, idx); 989 } 990 991 static int perf_stat__get_core_cached(struct perf_stat_config *config, 992 struct perf_cpu_map *map, int idx) 993 { 994 return perf_stat__get_aggr(config, perf_stat__get_core, map, idx); 995 } 996 997 static int perf_stat__get_node_cached(struct perf_stat_config *config, 998 struct perf_cpu_map *map, int idx) 999 { 1000 return perf_stat__get_aggr(config, perf_stat__get_node, map, idx); 1001 } 1002 1003 static bool term_percore_set(void) 1004 { 1005 struct evsel *counter; 1006 1007 evlist__for_each_entry(evsel_list, counter) { 1008 if (counter->percore) 1009 return true; 1010 } 1011 1012 return false; 1013 } 1014 1015 static int perf_stat_init_aggr_mode(void) 1016 { 1017 int nr; 1018 1019 switch (stat_config.aggr_mode) { 1020 case AGGR_SOCKET: 1021 if (cpu_map__build_socket_map(evsel_list->core.cpus, &stat_config.aggr_map)) { 1022 perror("cannot build socket map"); 1023 return -1; 1024 } 1025 stat_config.aggr_get_id = perf_stat__get_socket_cached; 1026 break; 1027 case AGGR_DIE: 1028 if (cpu_map__build_die_map(evsel_list->core.cpus, &stat_config.aggr_map)) { 1029 perror("cannot build die map"); 1030 return -1; 1031 } 1032 stat_config.aggr_get_id = perf_stat__get_die_cached; 1033 break; 1034 case AGGR_CORE: 1035 if (cpu_map__build_core_map(evsel_list->core.cpus, &stat_config.aggr_map)) { 1036 perror("cannot build core map"); 1037 return -1; 1038 } 1039 stat_config.aggr_get_id = perf_stat__get_core_cached; 1040 break; 1041 case AGGR_NODE: 1042 if (cpu_map__build_node_map(evsel_list->core.cpus, &stat_config.aggr_map)) { 1043 perror("cannot build core map"); 1044 return -1; 1045 } 1046 stat_config.aggr_get_id = perf_stat__get_node_cached; 1047 break; 1048 case AGGR_NONE: 1049 if (term_percore_set()) { 1050 if (cpu_map__build_core_map(evsel_list->core.cpus, 1051 &stat_config.aggr_map)) { 1052 perror("cannot build core map"); 1053 return -1; 1054 } 1055 stat_config.aggr_get_id = perf_stat__get_core_cached; 1056 } 1057 break; 1058 case AGGR_GLOBAL: 1059 case AGGR_THREAD: 1060 case AGGR_UNSET: 1061 default: 1062 break; 1063 } 1064 1065 /* 1066 * The evsel_list->cpus is the base we operate on, 1067 * taking the highest cpu number to be the size of 1068 * the aggregation translate cpumap. 1069 */ 1070 nr = perf_cpu_map__max(evsel_list->core.cpus); 1071 stat_config.cpus_aggr_map = perf_cpu_map__empty_new(nr + 1); 1072 return stat_config.cpus_aggr_map ? 0 : -ENOMEM; 1073 } 1074 1075 static void perf_stat__exit_aggr_mode(void) 1076 { 1077 perf_cpu_map__put(stat_config.aggr_map); 1078 perf_cpu_map__put(stat_config.cpus_aggr_map); 1079 stat_config.aggr_map = NULL; 1080 stat_config.cpus_aggr_map = NULL; 1081 } 1082 1083 static inline int perf_env__get_cpu(struct perf_env *env, struct perf_cpu_map *map, int idx) 1084 { 1085 int cpu; 1086 1087 if (idx > map->nr) 1088 return -1; 1089 1090 cpu = map->map[idx]; 1091 1092 if (cpu >= env->nr_cpus_avail) 1093 return -1; 1094 1095 return cpu; 1096 } 1097 1098 static int perf_env__get_socket(struct perf_cpu_map *map, int idx, void *data) 1099 { 1100 struct perf_env *env = data; 1101 int cpu = perf_env__get_cpu(env, map, idx); 1102 1103 return cpu == -1 ? -1 : env->cpu[cpu].socket_id; 1104 } 1105 1106 static int perf_env__get_die(struct perf_cpu_map *map, int idx, void *data) 1107 { 1108 struct perf_env *env = data; 1109 int die_id = -1, cpu = perf_env__get_cpu(env, map, idx); 1110 1111 if (cpu != -1) { 1112 /* 1113 * Encode socket in bit range 15:8 1114 * die_id is relative to socket, 1115 * we need a global id. So we combine 1116 * socket + die id 1117 */ 1118 if (WARN_ONCE(env->cpu[cpu].socket_id >> 8, "The socket id number is too big.\n")) 1119 return -1; 1120 1121 if (WARN_ONCE(env->cpu[cpu].die_id >> 8, "The die id number is too big.\n")) 1122 return -1; 1123 1124 die_id = (env->cpu[cpu].socket_id << 8) | (env->cpu[cpu].die_id & 0xff); 1125 } 1126 1127 return die_id; 1128 } 1129 1130 static int perf_env__get_core(struct perf_cpu_map *map, int idx, void *data) 1131 { 1132 struct perf_env *env = data; 1133 int core = -1, cpu = perf_env__get_cpu(env, map, idx); 1134 1135 if (cpu != -1) { 1136 /* 1137 * Encode socket in bit range 31:24 1138 * encode die id in bit range 23:16 1139 * core_id is relative to socket and die, 1140 * we need a global id. So we combine 1141 * socket + die id + core id 1142 */ 1143 if (WARN_ONCE(env->cpu[cpu].socket_id >> 8, "The socket id number is too big.\n")) 1144 return -1; 1145 1146 if (WARN_ONCE(env->cpu[cpu].die_id >> 8, "The die id number is too big.\n")) 1147 return -1; 1148 1149 if (WARN_ONCE(env->cpu[cpu].core_id >> 16, "The core id number is too big.\n")) 1150 return -1; 1151 1152 core = (env->cpu[cpu].socket_id << 24) | 1153 (env->cpu[cpu].die_id << 16) | 1154 (env->cpu[cpu].core_id & 0xffff); 1155 } 1156 1157 return core; 1158 } 1159 1160 static int perf_env__get_node(struct perf_cpu_map *map, int idx, void *data) 1161 { 1162 int cpu = perf_env__get_cpu(data, map, idx); 1163 1164 return perf_env__numa_node(data, cpu); 1165 } 1166 1167 static int perf_env__build_socket_map(struct perf_env *env, struct perf_cpu_map *cpus, 1168 struct perf_cpu_map **sockp) 1169 { 1170 return cpu_map__build_map(cpus, sockp, perf_env__get_socket, env); 1171 } 1172 1173 static int perf_env__build_die_map(struct perf_env *env, struct perf_cpu_map *cpus, 1174 struct perf_cpu_map **diep) 1175 { 1176 return cpu_map__build_map(cpus, diep, perf_env__get_die, env); 1177 } 1178 1179 static int perf_env__build_core_map(struct perf_env *env, struct perf_cpu_map *cpus, 1180 struct perf_cpu_map **corep) 1181 { 1182 return cpu_map__build_map(cpus, corep, perf_env__get_core, env); 1183 } 1184 1185 static int perf_env__build_node_map(struct perf_env *env, struct perf_cpu_map *cpus, 1186 struct perf_cpu_map **nodep) 1187 { 1188 return cpu_map__build_map(cpus, nodep, perf_env__get_node, env); 1189 } 1190 1191 static int perf_stat__get_socket_file(struct perf_stat_config *config __maybe_unused, 1192 struct perf_cpu_map *map, int idx) 1193 { 1194 return perf_env__get_socket(map, idx, &perf_stat.session->header.env); 1195 } 1196 static int perf_stat__get_die_file(struct perf_stat_config *config __maybe_unused, 1197 struct perf_cpu_map *map, int idx) 1198 { 1199 return perf_env__get_die(map, idx, &perf_stat.session->header.env); 1200 } 1201 1202 static int perf_stat__get_core_file(struct perf_stat_config *config __maybe_unused, 1203 struct perf_cpu_map *map, int idx) 1204 { 1205 return perf_env__get_core(map, idx, &perf_stat.session->header.env); 1206 } 1207 1208 static int perf_stat__get_node_file(struct perf_stat_config *config __maybe_unused, 1209 struct perf_cpu_map *map, int idx) 1210 { 1211 return perf_env__get_node(map, idx, &perf_stat.session->header.env); 1212 } 1213 1214 static int perf_stat_init_aggr_mode_file(struct perf_stat *st) 1215 { 1216 struct perf_env *env = &st->session->header.env; 1217 1218 switch (stat_config.aggr_mode) { 1219 case AGGR_SOCKET: 1220 if (perf_env__build_socket_map(env, evsel_list->core.cpus, &stat_config.aggr_map)) { 1221 perror("cannot build socket map"); 1222 return -1; 1223 } 1224 stat_config.aggr_get_id = perf_stat__get_socket_file; 1225 break; 1226 case AGGR_DIE: 1227 if (perf_env__build_die_map(env, evsel_list->core.cpus, &stat_config.aggr_map)) { 1228 perror("cannot build die map"); 1229 return -1; 1230 } 1231 stat_config.aggr_get_id = perf_stat__get_die_file; 1232 break; 1233 case AGGR_CORE: 1234 if (perf_env__build_core_map(env, evsel_list->core.cpus, &stat_config.aggr_map)) { 1235 perror("cannot build core map"); 1236 return -1; 1237 } 1238 stat_config.aggr_get_id = perf_stat__get_core_file; 1239 break; 1240 case AGGR_NODE: 1241 if (perf_env__build_node_map(env, evsel_list->core.cpus, &stat_config.aggr_map)) { 1242 perror("cannot build core map"); 1243 return -1; 1244 } 1245 stat_config.aggr_get_id = perf_stat__get_node_file; 1246 break; 1247 case AGGR_NONE: 1248 case AGGR_GLOBAL: 1249 case AGGR_THREAD: 1250 case AGGR_UNSET: 1251 default: 1252 break; 1253 } 1254 1255 return 0; 1256 } 1257 1258 static int topdown_filter_events(const char **attr, char **str, bool use_group) 1259 { 1260 int off = 0; 1261 int i; 1262 int len = 0; 1263 char *s; 1264 1265 for (i = 0; attr[i]; i++) { 1266 if (pmu_have_event("cpu", attr[i])) { 1267 len += strlen(attr[i]) + 1; 1268 attr[i - off] = attr[i]; 1269 } else 1270 off++; 1271 } 1272 attr[i - off] = NULL; 1273 1274 *str = malloc(len + 1 + 2); 1275 if (!*str) 1276 return -1; 1277 s = *str; 1278 if (i - off == 0) { 1279 *s = 0; 1280 return 0; 1281 } 1282 if (use_group) 1283 *s++ = '{'; 1284 for (i = 0; attr[i]; i++) { 1285 strcpy(s, attr[i]); 1286 s += strlen(s); 1287 *s++ = ','; 1288 } 1289 if (use_group) { 1290 s[-1] = '}'; 1291 *s = 0; 1292 } else 1293 s[-1] = 0; 1294 return 0; 1295 } 1296 1297 __weak bool arch_topdown_check_group(bool *warn) 1298 { 1299 *warn = false; 1300 return false; 1301 } 1302 1303 __weak void arch_topdown_group_warn(void) 1304 { 1305 } 1306 1307 /* 1308 * Add default attributes, if there were no attributes specified or 1309 * if -d/--detailed, -d -d or -d -d -d is used: 1310 */ 1311 static int add_default_attributes(void) 1312 { 1313 int err; 1314 struct perf_event_attr default_attrs0[] = { 1315 1316 { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_TASK_CLOCK }, 1317 { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_CONTEXT_SWITCHES }, 1318 { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_CPU_MIGRATIONS }, 1319 { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_PAGE_FAULTS }, 1320 1321 { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_CPU_CYCLES }, 1322 }; 1323 struct perf_event_attr frontend_attrs[] = { 1324 { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_STALLED_CYCLES_FRONTEND }, 1325 }; 1326 struct perf_event_attr backend_attrs[] = { 1327 { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_STALLED_CYCLES_BACKEND }, 1328 }; 1329 struct perf_event_attr default_attrs1[] = { 1330 { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_INSTRUCTIONS }, 1331 { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_BRANCH_INSTRUCTIONS }, 1332 { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_BRANCH_MISSES }, 1333 1334 }; 1335 1336 /* 1337 * Detailed stats (-d), covering the L1 and last level data caches: 1338 */ 1339 struct perf_event_attr detailed_attrs[] = { 1340 1341 { .type = PERF_TYPE_HW_CACHE, 1342 .config = 1343 PERF_COUNT_HW_CACHE_L1D << 0 | 1344 (PERF_COUNT_HW_CACHE_OP_READ << 8) | 1345 (PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16) }, 1346 1347 { .type = PERF_TYPE_HW_CACHE, 1348 .config = 1349 PERF_COUNT_HW_CACHE_L1D << 0 | 1350 (PERF_COUNT_HW_CACHE_OP_READ << 8) | 1351 (PERF_COUNT_HW_CACHE_RESULT_MISS << 16) }, 1352 1353 { .type = PERF_TYPE_HW_CACHE, 1354 .config = 1355 PERF_COUNT_HW_CACHE_LL << 0 | 1356 (PERF_COUNT_HW_CACHE_OP_READ << 8) | 1357 (PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16) }, 1358 1359 { .type = PERF_TYPE_HW_CACHE, 1360 .config = 1361 PERF_COUNT_HW_CACHE_LL << 0 | 1362 (PERF_COUNT_HW_CACHE_OP_READ << 8) | 1363 (PERF_COUNT_HW_CACHE_RESULT_MISS << 16) }, 1364 }; 1365 1366 /* 1367 * Very detailed stats (-d -d), covering the instruction cache and the TLB caches: 1368 */ 1369 struct perf_event_attr very_detailed_attrs[] = { 1370 1371 { .type = PERF_TYPE_HW_CACHE, 1372 .config = 1373 PERF_COUNT_HW_CACHE_L1I << 0 | 1374 (PERF_COUNT_HW_CACHE_OP_READ << 8) | 1375 (PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16) }, 1376 1377 { .type = PERF_TYPE_HW_CACHE, 1378 .config = 1379 PERF_COUNT_HW_CACHE_L1I << 0 | 1380 (PERF_COUNT_HW_CACHE_OP_READ << 8) | 1381 (PERF_COUNT_HW_CACHE_RESULT_MISS << 16) }, 1382 1383 { .type = PERF_TYPE_HW_CACHE, 1384 .config = 1385 PERF_COUNT_HW_CACHE_DTLB << 0 | 1386 (PERF_COUNT_HW_CACHE_OP_READ << 8) | 1387 (PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16) }, 1388 1389 { .type = PERF_TYPE_HW_CACHE, 1390 .config = 1391 PERF_COUNT_HW_CACHE_DTLB << 0 | 1392 (PERF_COUNT_HW_CACHE_OP_READ << 8) | 1393 (PERF_COUNT_HW_CACHE_RESULT_MISS << 16) }, 1394 1395 { .type = PERF_TYPE_HW_CACHE, 1396 .config = 1397 PERF_COUNT_HW_CACHE_ITLB << 0 | 1398 (PERF_COUNT_HW_CACHE_OP_READ << 8) | 1399 (PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16) }, 1400 1401 { .type = PERF_TYPE_HW_CACHE, 1402 .config = 1403 PERF_COUNT_HW_CACHE_ITLB << 0 | 1404 (PERF_COUNT_HW_CACHE_OP_READ << 8) | 1405 (PERF_COUNT_HW_CACHE_RESULT_MISS << 16) }, 1406 1407 }; 1408 1409 /* 1410 * Very, very detailed stats (-d -d -d), adding prefetch events: 1411 */ 1412 struct perf_event_attr very_very_detailed_attrs[] = { 1413 1414 { .type = PERF_TYPE_HW_CACHE, 1415 .config = 1416 PERF_COUNT_HW_CACHE_L1D << 0 | 1417 (PERF_COUNT_HW_CACHE_OP_PREFETCH << 8) | 1418 (PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16) }, 1419 1420 { .type = PERF_TYPE_HW_CACHE, 1421 .config = 1422 PERF_COUNT_HW_CACHE_L1D << 0 | 1423 (PERF_COUNT_HW_CACHE_OP_PREFETCH << 8) | 1424 (PERF_COUNT_HW_CACHE_RESULT_MISS << 16) }, 1425 }; 1426 struct parse_events_error errinfo; 1427 1428 /* Set attrs if no event is selected and !null_run: */ 1429 if (stat_config.null_run) 1430 return 0; 1431 1432 bzero(&errinfo, sizeof(errinfo)); 1433 if (transaction_run) { 1434 /* Handle -T as -M transaction. Once platform specific metrics 1435 * support has been added to the json files, all archictures 1436 * will use this approach. To determine transaction support 1437 * on an architecture test for such a metric name. 1438 */ 1439 if (metricgroup__has_metric("transaction")) { 1440 struct option opt = { .value = &evsel_list }; 1441 1442 return metricgroup__parse_groups(&opt, "transaction", 1443 &stat_config.metric_events); 1444 } 1445 1446 if (pmu_have_event("cpu", "cycles-ct") && 1447 pmu_have_event("cpu", "el-start")) 1448 err = parse_events(evsel_list, transaction_attrs, 1449 &errinfo); 1450 else 1451 err = parse_events(evsel_list, 1452 transaction_limited_attrs, 1453 &errinfo); 1454 if (err) { 1455 fprintf(stderr, "Cannot set up transaction events\n"); 1456 parse_events_print_error(&errinfo, transaction_attrs); 1457 return -1; 1458 } 1459 return 0; 1460 } 1461 1462 if (smi_cost) { 1463 int smi; 1464 1465 if (sysfs__read_int(FREEZE_ON_SMI_PATH, &smi) < 0) { 1466 fprintf(stderr, "freeze_on_smi is not supported.\n"); 1467 return -1; 1468 } 1469 1470 if (!smi) { 1471 if (sysfs__write_int(FREEZE_ON_SMI_PATH, 1) < 0) { 1472 fprintf(stderr, "Failed to set freeze_on_smi.\n"); 1473 return -1; 1474 } 1475 smi_reset = true; 1476 } 1477 1478 if (pmu_have_event("msr", "aperf") && 1479 pmu_have_event("msr", "smi")) { 1480 if (!force_metric_only) 1481 stat_config.metric_only = true; 1482 err = parse_events(evsel_list, smi_cost_attrs, &errinfo); 1483 } else { 1484 fprintf(stderr, "To measure SMI cost, it needs " 1485 "msr/aperf/, msr/smi/ and cpu/cycles/ support\n"); 1486 parse_events_print_error(&errinfo, smi_cost_attrs); 1487 return -1; 1488 } 1489 if (err) { 1490 parse_events_print_error(&errinfo, smi_cost_attrs); 1491 fprintf(stderr, "Cannot set up SMI cost events\n"); 1492 return -1; 1493 } 1494 return 0; 1495 } 1496 1497 if (topdown_run) { 1498 char *str = NULL; 1499 bool warn = false; 1500 1501 if (stat_config.aggr_mode != AGGR_GLOBAL && 1502 stat_config.aggr_mode != AGGR_CORE) { 1503 pr_err("top down event configuration requires --per-core mode\n"); 1504 return -1; 1505 } 1506 stat_config.aggr_mode = AGGR_CORE; 1507 if (nr_cgroups || !target__has_cpu(&target)) { 1508 pr_err("top down event configuration requires system-wide mode (-a)\n"); 1509 return -1; 1510 } 1511 1512 if (!force_metric_only) 1513 stat_config.metric_only = true; 1514 if (topdown_filter_events(topdown_attrs, &str, 1515 arch_topdown_check_group(&warn)) < 0) { 1516 pr_err("Out of memory\n"); 1517 return -1; 1518 } 1519 if (topdown_attrs[0] && str) { 1520 if (warn) 1521 arch_topdown_group_warn(); 1522 err = parse_events(evsel_list, str, &errinfo); 1523 if (err) { 1524 fprintf(stderr, 1525 "Cannot set up top down events %s: %d\n", 1526 str, err); 1527 parse_events_print_error(&errinfo, str); 1528 free(str); 1529 return -1; 1530 } 1531 } else { 1532 fprintf(stderr, "System does not support topdown\n"); 1533 return -1; 1534 } 1535 free(str); 1536 } 1537 1538 if (!evsel_list->core.nr_entries) { 1539 if (target__has_cpu(&target)) 1540 default_attrs0[0].config = PERF_COUNT_SW_CPU_CLOCK; 1541 1542 if (perf_evlist__add_default_attrs(evsel_list, default_attrs0) < 0) 1543 return -1; 1544 if (pmu_have_event("cpu", "stalled-cycles-frontend")) { 1545 if (perf_evlist__add_default_attrs(evsel_list, 1546 frontend_attrs) < 0) 1547 return -1; 1548 } 1549 if (pmu_have_event("cpu", "stalled-cycles-backend")) { 1550 if (perf_evlist__add_default_attrs(evsel_list, 1551 backend_attrs) < 0) 1552 return -1; 1553 } 1554 if (perf_evlist__add_default_attrs(evsel_list, default_attrs1) < 0) 1555 return -1; 1556 } 1557 1558 /* Detailed events get appended to the event list: */ 1559 1560 if (detailed_run < 1) 1561 return 0; 1562 1563 /* Append detailed run extra attributes: */ 1564 if (perf_evlist__add_default_attrs(evsel_list, detailed_attrs) < 0) 1565 return -1; 1566 1567 if (detailed_run < 2) 1568 return 0; 1569 1570 /* Append very detailed run extra attributes: */ 1571 if (perf_evlist__add_default_attrs(evsel_list, very_detailed_attrs) < 0) 1572 return -1; 1573 1574 if (detailed_run < 3) 1575 return 0; 1576 1577 /* Append very, very detailed run extra attributes: */ 1578 return perf_evlist__add_default_attrs(evsel_list, very_very_detailed_attrs); 1579 } 1580 1581 static const char * const stat_record_usage[] = { 1582 "perf stat record [<options>]", 1583 NULL, 1584 }; 1585 1586 static void init_features(struct perf_session *session) 1587 { 1588 int feat; 1589 1590 for (feat = HEADER_FIRST_FEATURE; feat < HEADER_LAST_FEATURE; feat++) 1591 perf_header__set_feat(&session->header, feat); 1592 1593 perf_header__clear_feat(&session->header, HEADER_DIR_FORMAT); 1594 perf_header__clear_feat(&session->header, HEADER_BUILD_ID); 1595 perf_header__clear_feat(&session->header, HEADER_TRACING_DATA); 1596 perf_header__clear_feat(&session->header, HEADER_BRANCH_STACK); 1597 perf_header__clear_feat(&session->header, HEADER_AUXTRACE); 1598 } 1599 1600 static int __cmd_record(int argc, const char **argv) 1601 { 1602 struct perf_session *session; 1603 struct perf_data *data = &perf_stat.data; 1604 1605 argc = parse_options(argc, argv, stat_options, stat_record_usage, 1606 PARSE_OPT_STOP_AT_NON_OPTION); 1607 1608 if (output_name) 1609 data->path = output_name; 1610 1611 if (stat_config.run_count != 1 || forever) { 1612 pr_err("Cannot use -r option with perf stat record.\n"); 1613 return -1; 1614 } 1615 1616 session = perf_session__new(data, false, NULL); 1617 if (IS_ERR(session)) { 1618 pr_err("Perf session creation failed\n"); 1619 return PTR_ERR(session); 1620 } 1621 1622 init_features(session); 1623 1624 session->evlist = evsel_list; 1625 perf_stat.session = session; 1626 perf_stat.record = true; 1627 return argc; 1628 } 1629 1630 static int process_stat_round_event(struct perf_session *session, 1631 union perf_event *event) 1632 { 1633 struct perf_record_stat_round *stat_round = &event->stat_round; 1634 struct evsel *counter; 1635 struct timespec tsh, *ts = NULL; 1636 const char **argv = session->header.env.cmdline_argv; 1637 int argc = session->header.env.nr_cmdline; 1638 1639 evlist__for_each_entry(evsel_list, counter) 1640 perf_stat_process_counter(&stat_config, counter); 1641 1642 if (stat_round->type == PERF_STAT_ROUND_TYPE__FINAL) 1643 update_stats(&walltime_nsecs_stats, stat_round->time); 1644 1645 if (stat_config.interval && stat_round->time) { 1646 tsh.tv_sec = stat_round->time / NSEC_PER_SEC; 1647 tsh.tv_nsec = stat_round->time % NSEC_PER_SEC; 1648 ts = &tsh; 1649 } 1650 1651 print_counters(ts, argc, argv); 1652 return 0; 1653 } 1654 1655 static 1656 int process_stat_config_event(struct perf_session *session, 1657 union perf_event *event) 1658 { 1659 struct perf_tool *tool = session->tool; 1660 struct perf_stat *st = container_of(tool, struct perf_stat, tool); 1661 1662 perf_event__read_stat_config(&stat_config, &event->stat_config); 1663 1664 if (perf_cpu_map__empty(st->cpus)) { 1665 if (st->aggr_mode != AGGR_UNSET) 1666 pr_warning("warning: processing task data, aggregation mode not set\n"); 1667 return 0; 1668 } 1669 1670 if (st->aggr_mode != AGGR_UNSET) 1671 stat_config.aggr_mode = st->aggr_mode; 1672 1673 if (perf_stat.data.is_pipe) 1674 perf_stat_init_aggr_mode(); 1675 else 1676 perf_stat_init_aggr_mode_file(st); 1677 1678 return 0; 1679 } 1680 1681 static int set_maps(struct perf_stat *st) 1682 { 1683 if (!st->cpus || !st->threads) 1684 return 0; 1685 1686 if (WARN_ONCE(st->maps_allocated, "stats double allocation\n")) 1687 return -EINVAL; 1688 1689 perf_evlist__set_maps(&evsel_list->core, st->cpus, st->threads); 1690 1691 if (perf_evlist__alloc_stats(evsel_list, true)) 1692 return -ENOMEM; 1693 1694 st->maps_allocated = true; 1695 return 0; 1696 } 1697 1698 static 1699 int process_thread_map_event(struct perf_session *session, 1700 union perf_event *event) 1701 { 1702 struct perf_tool *tool = session->tool; 1703 struct perf_stat *st = container_of(tool, struct perf_stat, tool); 1704 1705 if (st->threads) { 1706 pr_warning("Extra thread map event, ignoring.\n"); 1707 return 0; 1708 } 1709 1710 st->threads = thread_map__new_event(&event->thread_map); 1711 if (!st->threads) 1712 return -ENOMEM; 1713 1714 return set_maps(st); 1715 } 1716 1717 static 1718 int process_cpu_map_event(struct perf_session *session, 1719 union perf_event *event) 1720 { 1721 struct perf_tool *tool = session->tool; 1722 struct perf_stat *st = container_of(tool, struct perf_stat, tool); 1723 struct perf_cpu_map *cpus; 1724 1725 if (st->cpus) { 1726 pr_warning("Extra cpu map event, ignoring.\n"); 1727 return 0; 1728 } 1729 1730 cpus = cpu_map__new_data(&event->cpu_map.data); 1731 if (!cpus) 1732 return -ENOMEM; 1733 1734 st->cpus = cpus; 1735 return set_maps(st); 1736 } 1737 1738 static int runtime_stat_new(struct perf_stat_config *config, int nthreads) 1739 { 1740 int i; 1741 1742 config->stats = calloc(nthreads, sizeof(struct runtime_stat)); 1743 if (!config->stats) 1744 return -1; 1745 1746 config->stats_num = nthreads; 1747 1748 for (i = 0; i < nthreads; i++) 1749 runtime_stat__init(&config->stats[i]); 1750 1751 return 0; 1752 } 1753 1754 static void runtime_stat_delete(struct perf_stat_config *config) 1755 { 1756 int i; 1757 1758 if (!config->stats) 1759 return; 1760 1761 for (i = 0; i < config->stats_num; i++) 1762 runtime_stat__exit(&config->stats[i]); 1763 1764 zfree(&config->stats); 1765 } 1766 1767 static const char * const stat_report_usage[] = { 1768 "perf stat report [<options>]", 1769 NULL, 1770 }; 1771 1772 static struct perf_stat perf_stat = { 1773 .tool = { 1774 .attr = perf_event__process_attr, 1775 .event_update = perf_event__process_event_update, 1776 .thread_map = process_thread_map_event, 1777 .cpu_map = process_cpu_map_event, 1778 .stat_config = process_stat_config_event, 1779 .stat = perf_event__process_stat_event, 1780 .stat_round = process_stat_round_event, 1781 }, 1782 .aggr_mode = AGGR_UNSET, 1783 }; 1784 1785 static int __cmd_report(int argc, const char **argv) 1786 { 1787 struct perf_session *session; 1788 const struct option options[] = { 1789 OPT_STRING('i', "input", &input_name, "file", "input file name"), 1790 OPT_SET_UINT(0, "per-socket", &perf_stat.aggr_mode, 1791 "aggregate counts per processor socket", AGGR_SOCKET), 1792 OPT_SET_UINT(0, "per-die", &perf_stat.aggr_mode, 1793 "aggregate counts per processor die", AGGR_DIE), 1794 OPT_SET_UINT(0, "per-core", &perf_stat.aggr_mode, 1795 "aggregate counts per physical processor core", AGGR_CORE), 1796 OPT_SET_UINT(0, "per-node", &perf_stat.aggr_mode, 1797 "aggregate counts per numa node", AGGR_NODE), 1798 OPT_SET_UINT('A', "no-aggr", &perf_stat.aggr_mode, 1799 "disable CPU count aggregation", AGGR_NONE), 1800 OPT_END() 1801 }; 1802 struct stat st; 1803 int ret; 1804 1805 argc = parse_options(argc, argv, options, stat_report_usage, 0); 1806 1807 if (!input_name || !strlen(input_name)) { 1808 if (!fstat(STDIN_FILENO, &st) && S_ISFIFO(st.st_mode)) 1809 input_name = "-"; 1810 else 1811 input_name = "perf.data"; 1812 } 1813 1814 perf_stat.data.path = input_name; 1815 perf_stat.data.mode = PERF_DATA_MODE_READ; 1816 1817 session = perf_session__new(&perf_stat.data, false, &perf_stat.tool); 1818 if (IS_ERR(session)) 1819 return PTR_ERR(session); 1820 1821 perf_stat.session = session; 1822 stat_config.output = stderr; 1823 evsel_list = session->evlist; 1824 1825 ret = perf_session__process_events(session); 1826 if (ret) 1827 return ret; 1828 1829 perf_session__delete(session); 1830 return 0; 1831 } 1832 1833 static void setup_system_wide(int forks) 1834 { 1835 /* 1836 * Make system wide (-a) the default target if 1837 * no target was specified and one of following 1838 * conditions is met: 1839 * 1840 * - there's no workload specified 1841 * - there is workload specified but all requested 1842 * events are system wide events 1843 */ 1844 if (!target__none(&target)) 1845 return; 1846 1847 if (!forks) 1848 target.system_wide = true; 1849 else { 1850 struct evsel *counter; 1851 1852 evlist__for_each_entry(evsel_list, counter) { 1853 if (!counter->core.system_wide) 1854 return; 1855 } 1856 1857 if (evsel_list->core.nr_entries) 1858 target.system_wide = true; 1859 } 1860 } 1861 1862 int cmd_stat(int argc, const char **argv) 1863 { 1864 const char * const stat_usage[] = { 1865 "perf stat [<options>] [<command>]", 1866 NULL 1867 }; 1868 int status = -EINVAL, run_idx; 1869 const char *mode; 1870 FILE *output = stderr; 1871 unsigned int interval, timeout; 1872 const char * const stat_subcommands[] = { "record", "report" }; 1873 1874 setlocale(LC_ALL, ""); 1875 1876 evsel_list = evlist__new(); 1877 if (evsel_list == NULL) 1878 return -ENOMEM; 1879 1880 parse_events__shrink_config_terms(); 1881 1882 /* String-parsing callback-based options would segfault when negated */ 1883 set_option_flag(stat_options, 'e', "event", PARSE_OPT_NONEG); 1884 set_option_flag(stat_options, 'M', "metrics", PARSE_OPT_NONEG); 1885 set_option_flag(stat_options, 'G', "cgroup", PARSE_OPT_NONEG); 1886 1887 argc = parse_options_subcommand(argc, argv, stat_options, stat_subcommands, 1888 (const char **) stat_usage, 1889 PARSE_OPT_STOP_AT_NON_OPTION); 1890 perf_stat__collect_metric_expr(evsel_list); 1891 perf_stat__init_shadow_stats(); 1892 1893 if (stat_config.csv_sep) { 1894 stat_config.csv_output = true; 1895 if (!strcmp(stat_config.csv_sep, "\\t")) 1896 stat_config.csv_sep = "\t"; 1897 } else 1898 stat_config.csv_sep = DEFAULT_SEPARATOR; 1899 1900 if (argc && !strncmp(argv[0], "rec", 3)) { 1901 argc = __cmd_record(argc, argv); 1902 if (argc < 0) 1903 return -1; 1904 } else if (argc && !strncmp(argv[0], "rep", 3)) 1905 return __cmd_report(argc, argv); 1906 1907 interval = stat_config.interval; 1908 timeout = stat_config.timeout; 1909 1910 /* 1911 * For record command the -o is already taken care of. 1912 */ 1913 if (!STAT_RECORD && output_name && strcmp(output_name, "-")) 1914 output = NULL; 1915 1916 if (output_name && output_fd) { 1917 fprintf(stderr, "cannot use both --output and --log-fd\n"); 1918 parse_options_usage(stat_usage, stat_options, "o", 1); 1919 parse_options_usage(NULL, stat_options, "log-fd", 0); 1920 goto out; 1921 } 1922 1923 if (stat_config.metric_only && stat_config.aggr_mode == AGGR_THREAD) { 1924 fprintf(stderr, "--metric-only is not supported with --per-thread\n"); 1925 goto out; 1926 } 1927 1928 if (stat_config.metric_only && stat_config.run_count > 1) { 1929 fprintf(stderr, "--metric-only is not supported with -r\n"); 1930 goto out; 1931 } 1932 1933 if (stat_config.walltime_run_table && stat_config.run_count <= 1) { 1934 fprintf(stderr, "--table is only supported with -r\n"); 1935 parse_options_usage(stat_usage, stat_options, "r", 1); 1936 parse_options_usage(NULL, stat_options, "table", 0); 1937 goto out; 1938 } 1939 1940 if (output_fd < 0) { 1941 fprintf(stderr, "argument to --log-fd must be a > 0\n"); 1942 parse_options_usage(stat_usage, stat_options, "log-fd", 0); 1943 goto out; 1944 } 1945 1946 if (!output) { 1947 struct timespec tm; 1948 mode = append_file ? "a" : "w"; 1949 1950 output = fopen(output_name, mode); 1951 if (!output) { 1952 perror("failed to create output file"); 1953 return -1; 1954 } 1955 clock_gettime(CLOCK_REALTIME, &tm); 1956 fprintf(output, "# started on %s\n", ctime(&tm.tv_sec)); 1957 } else if (output_fd > 0) { 1958 mode = append_file ? "a" : "w"; 1959 output = fdopen(output_fd, mode); 1960 if (!output) { 1961 perror("Failed opening logfd"); 1962 return -errno; 1963 } 1964 } 1965 1966 stat_config.output = output; 1967 1968 /* 1969 * let the spreadsheet do the pretty-printing 1970 */ 1971 if (stat_config.csv_output) { 1972 /* User explicitly passed -B? */ 1973 if (big_num_opt == 1) { 1974 fprintf(stderr, "-B option not supported with -x\n"); 1975 parse_options_usage(stat_usage, stat_options, "B", 1); 1976 parse_options_usage(NULL, stat_options, "x", 1); 1977 goto out; 1978 } else /* Nope, so disable big number formatting */ 1979 stat_config.big_num = false; 1980 } else if (big_num_opt == 0) /* User passed --no-big-num */ 1981 stat_config.big_num = false; 1982 1983 setup_system_wide(argc); 1984 1985 /* 1986 * Display user/system times only for single 1987 * run and when there's specified tracee. 1988 */ 1989 if ((stat_config.run_count == 1) && target__none(&target)) 1990 stat_config.ru_display = true; 1991 1992 if (stat_config.run_count < 0) { 1993 pr_err("Run count must be a positive number\n"); 1994 parse_options_usage(stat_usage, stat_options, "r", 1); 1995 goto out; 1996 } else if (stat_config.run_count == 0) { 1997 forever = true; 1998 stat_config.run_count = 1; 1999 } 2000 2001 if (stat_config.walltime_run_table) { 2002 stat_config.walltime_run = zalloc(stat_config.run_count * sizeof(stat_config.walltime_run[0])); 2003 if (!stat_config.walltime_run) { 2004 pr_err("failed to setup -r option"); 2005 goto out; 2006 } 2007 } 2008 2009 if ((stat_config.aggr_mode == AGGR_THREAD) && 2010 !target__has_task(&target)) { 2011 if (!target.system_wide || target.cpu_list) { 2012 fprintf(stderr, "The --per-thread option is only " 2013 "available when monitoring via -p -t -a " 2014 "options or only --per-thread.\n"); 2015 parse_options_usage(NULL, stat_options, "p", 1); 2016 parse_options_usage(NULL, stat_options, "t", 1); 2017 goto out; 2018 } 2019 } 2020 2021 /* 2022 * no_aggr, cgroup are for system-wide only 2023 * --per-thread is aggregated per thread, we dont mix it with cpu mode 2024 */ 2025 if (((stat_config.aggr_mode != AGGR_GLOBAL && 2026 stat_config.aggr_mode != AGGR_THREAD) || nr_cgroups) && 2027 !target__has_cpu(&target)) { 2028 fprintf(stderr, "both cgroup and no-aggregation " 2029 "modes only available in system-wide mode\n"); 2030 2031 parse_options_usage(stat_usage, stat_options, "G", 1); 2032 parse_options_usage(NULL, stat_options, "A", 1); 2033 parse_options_usage(NULL, stat_options, "a", 1); 2034 goto out; 2035 } 2036 2037 if (add_default_attributes()) 2038 goto out; 2039 2040 target__validate(&target); 2041 2042 if ((stat_config.aggr_mode == AGGR_THREAD) && (target.system_wide)) 2043 target.per_thread = true; 2044 2045 if (perf_evlist__create_maps(evsel_list, &target) < 0) { 2046 if (target__has_task(&target)) { 2047 pr_err("Problems finding threads of monitor\n"); 2048 parse_options_usage(stat_usage, stat_options, "p", 1); 2049 parse_options_usage(NULL, stat_options, "t", 1); 2050 } else if (target__has_cpu(&target)) { 2051 perror("failed to parse CPUs map"); 2052 parse_options_usage(stat_usage, stat_options, "C", 1); 2053 parse_options_usage(NULL, stat_options, "a", 1); 2054 } 2055 goto out; 2056 } 2057 2058 /* 2059 * Initialize thread_map with comm names, 2060 * so we could print it out on output. 2061 */ 2062 if (stat_config.aggr_mode == AGGR_THREAD) { 2063 thread_map__read_comms(evsel_list->core.threads); 2064 if (target.system_wide) { 2065 if (runtime_stat_new(&stat_config, 2066 perf_thread_map__nr(evsel_list->core.threads))) { 2067 goto out; 2068 } 2069 } 2070 } 2071 2072 if (stat_config.aggr_mode == AGGR_NODE) 2073 cpu__setup_cpunode_map(); 2074 2075 if (stat_config.times && interval) 2076 interval_count = true; 2077 else if (stat_config.times && !interval) { 2078 pr_err("interval-count option should be used together with " 2079 "interval-print.\n"); 2080 parse_options_usage(stat_usage, stat_options, "interval-count", 0); 2081 parse_options_usage(stat_usage, stat_options, "I", 1); 2082 goto out; 2083 } 2084 2085 if (timeout && timeout < 100) { 2086 if (timeout < 10) { 2087 pr_err("timeout must be >= 10ms.\n"); 2088 parse_options_usage(stat_usage, stat_options, "timeout", 0); 2089 goto out; 2090 } else 2091 pr_warning("timeout < 100ms. " 2092 "The overhead percentage could be high in some cases. " 2093 "Please proceed with caution.\n"); 2094 } 2095 if (timeout && interval) { 2096 pr_err("timeout option is not supported with interval-print.\n"); 2097 parse_options_usage(stat_usage, stat_options, "timeout", 0); 2098 parse_options_usage(stat_usage, stat_options, "I", 1); 2099 goto out; 2100 } 2101 2102 if (perf_evlist__alloc_stats(evsel_list, interval)) 2103 goto out; 2104 2105 if (perf_stat_init_aggr_mode()) 2106 goto out; 2107 2108 /* 2109 * Set sample_type to PERF_SAMPLE_IDENTIFIER, which should be harmless 2110 * while avoiding that older tools show confusing messages. 2111 * 2112 * However for pipe sessions we need to keep it zero, 2113 * because script's perf_evsel__check_attr is triggered 2114 * by attr->sample_type != 0, and we can't run it on 2115 * stat sessions. 2116 */ 2117 stat_config.identifier = !(STAT_RECORD && perf_stat.data.is_pipe); 2118 2119 /* 2120 * We dont want to block the signals - that would cause 2121 * child tasks to inherit that and Ctrl-C would not work. 2122 * What we want is for Ctrl-C to work in the exec()-ed 2123 * task, but being ignored by perf stat itself: 2124 */ 2125 atexit(sig_atexit); 2126 if (!forever) 2127 signal(SIGINT, skip_signal); 2128 signal(SIGCHLD, skip_signal); 2129 signal(SIGALRM, skip_signal); 2130 signal(SIGABRT, skip_signal); 2131 2132 status = 0; 2133 for (run_idx = 0; forever || run_idx < stat_config.run_count; run_idx++) { 2134 if (stat_config.run_count != 1 && verbose > 0) 2135 fprintf(output, "[ perf stat: executing run #%d ... ]\n", 2136 run_idx + 1); 2137 2138 if (run_idx != 0) 2139 perf_evlist__reset_prev_raw_counts(evsel_list); 2140 2141 status = run_perf_stat(argc, argv, run_idx); 2142 if (forever && status != -1 && !interval) { 2143 print_counters(NULL, argc, argv); 2144 perf_stat__reset_stats(); 2145 } 2146 } 2147 2148 if (!forever && status != -1 && !interval) 2149 print_counters(NULL, argc, argv); 2150 2151 if (STAT_RECORD) { 2152 /* 2153 * We synthesize the kernel mmap record just so that older tools 2154 * don't emit warnings about not being able to resolve symbols 2155 * due to /proc/sys/kernel/kptr_restrict settings and instear provide 2156 * a saner message about no samples being in the perf.data file. 2157 * 2158 * This also serves to suppress a warning about f_header.data.size == 0 2159 * in header.c at the moment 'perf stat record' gets introduced, which 2160 * is not really needed once we start adding the stat specific PERF_RECORD_ 2161 * records, but the need to suppress the kptr_restrict messages in older 2162 * tools remain -acme 2163 */ 2164 int fd = perf_data__fd(&perf_stat.data); 2165 int err = perf_event__synthesize_kernel_mmap((void *)&perf_stat, 2166 process_synthesized_event, 2167 &perf_stat.session->machines.host); 2168 if (err) { 2169 pr_warning("Couldn't synthesize the kernel mmap record, harmless, " 2170 "older tools may produce warnings about this file\n."); 2171 } 2172 2173 if (!interval) { 2174 if (WRITE_STAT_ROUND_EVENT(walltime_nsecs_stats.max, FINAL)) 2175 pr_err("failed to write stat round event\n"); 2176 } 2177 2178 if (!perf_stat.data.is_pipe) { 2179 perf_stat.session->header.data_size += perf_stat.bytes_written; 2180 perf_session__write_header(perf_stat.session, evsel_list, fd, true); 2181 } 2182 2183 evlist__close(evsel_list); 2184 perf_session__delete(perf_stat.session); 2185 } 2186 2187 perf_stat__exit_aggr_mode(); 2188 perf_evlist__free_stats(evsel_list); 2189 out: 2190 zfree(&stat_config.walltime_run); 2191 2192 if (smi_cost && smi_reset) 2193 sysfs__write_int(FREEZE_ON_SMI_PATH, 0); 2194 2195 evlist__delete(evsel_list); 2196 2197 runtime_stat_delete(&stat_config); 2198 2199 return status; 2200 } 2201