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 perf_stat__reset_shadow_per_stat(&rt_stat); 363 read_counters(&rs); 364 365 if (STAT_RECORD) { 366 if (WRITE_STAT_ROUND_EVENT(rs.tv_sec * NSEC_PER_SEC + rs.tv_nsec, INTERVAL)) 367 pr_err("failed to write stat round event\n"); 368 } 369 370 init_stats(&walltime_nsecs_stats); 371 update_stats(&walltime_nsecs_stats, stat_config.interval * 1000000); 372 print_counters(&rs, 0, NULL); 373 } 374 375 static void enable_counters(void) 376 { 377 if (stat_config.initial_delay) 378 usleep(stat_config.initial_delay * USEC_PER_MSEC); 379 380 /* 381 * We need to enable counters only if: 382 * - we don't have tracee (attaching to task or cpu) 383 * - we have initial delay configured 384 */ 385 if (!target__none(&target) || stat_config.initial_delay) 386 evlist__enable(evsel_list); 387 } 388 389 static void disable_counters(void) 390 { 391 /* 392 * If we don't have tracee (attaching to task or cpu), counters may 393 * still be running. To get accurate group ratios, we must stop groups 394 * from counting before reading their constituent counters. 395 */ 396 if (!target__none(&target)) 397 evlist__disable(evsel_list); 398 } 399 400 static volatile int workload_exec_errno; 401 402 /* 403 * perf_evlist__prepare_workload will send a SIGUSR1 404 * if the fork fails, since we asked by setting its 405 * want_signal to true. 406 */ 407 static void workload_exec_failed_signal(int signo __maybe_unused, siginfo_t *info, 408 void *ucontext __maybe_unused) 409 { 410 workload_exec_errno = info->si_value.sival_int; 411 } 412 413 static bool perf_evsel__should_store_id(struct evsel *counter) 414 { 415 return STAT_RECORD || counter->core.attr.read_format & PERF_FORMAT_ID; 416 } 417 418 static bool is_target_alive(struct target *_target, 419 struct perf_thread_map *threads) 420 { 421 struct stat st; 422 int i; 423 424 if (!target__has_task(_target)) 425 return true; 426 427 for (i = 0; i < threads->nr; i++) { 428 char path[PATH_MAX]; 429 430 scnprintf(path, PATH_MAX, "%s/%d", procfs__mountpoint(), 431 threads->map[i].pid); 432 433 if (!stat(path, &st)) 434 return true; 435 } 436 437 return false; 438 } 439 440 enum counter_recovery { 441 COUNTER_SKIP, 442 COUNTER_RETRY, 443 COUNTER_FATAL, 444 }; 445 446 static enum counter_recovery stat_handle_error(struct evsel *counter) 447 { 448 char msg[BUFSIZ]; 449 /* 450 * PPC returns ENXIO for HW counters until 2.6.37 451 * (behavior changed with commit b0a873e). 452 */ 453 if (errno == EINVAL || errno == ENOSYS || 454 errno == ENOENT || errno == EOPNOTSUPP || 455 errno == ENXIO) { 456 if (verbose > 0) 457 ui__warning("%s event is not supported by the kernel.\n", 458 perf_evsel__name(counter)); 459 counter->supported = false; 460 /* 461 * errored is a sticky flag that means one of the counter's 462 * cpu event had a problem and needs to be reexamined. 463 */ 464 counter->errored = true; 465 466 if ((counter->leader != counter) || 467 !(counter->leader->core.nr_members > 1)) 468 return COUNTER_SKIP; 469 } else if (perf_evsel__fallback(counter, errno, msg, sizeof(msg))) { 470 if (verbose > 0) 471 ui__warning("%s\n", msg); 472 return COUNTER_RETRY; 473 } else if (target__has_per_thread(&target) && 474 evsel_list->core.threads && 475 evsel_list->core.threads->err_thread != -1) { 476 /* 477 * For global --per-thread case, skip current 478 * error thread. 479 */ 480 if (!thread_map__remove(evsel_list->core.threads, 481 evsel_list->core.threads->err_thread)) { 482 evsel_list->core.threads->err_thread = -1; 483 return COUNTER_RETRY; 484 } 485 } 486 487 perf_evsel__open_strerror(counter, &target, 488 errno, msg, sizeof(msg)); 489 ui__error("%s\n", msg); 490 491 if (child_pid != -1) 492 kill(child_pid, SIGTERM); 493 return COUNTER_FATAL; 494 } 495 496 static int __run_perf_stat(int argc, const char **argv, int run_idx) 497 { 498 int interval = stat_config.interval; 499 int times = stat_config.times; 500 int timeout = stat_config.timeout; 501 char msg[BUFSIZ]; 502 unsigned long long t0, t1; 503 struct evsel *counter; 504 struct timespec ts; 505 size_t l; 506 int status = 0; 507 const bool forks = (argc > 0); 508 bool is_pipe = STAT_RECORD ? perf_stat.data.is_pipe : false; 509 struct affinity affinity; 510 int i, cpu; 511 bool second_pass = false; 512 513 if (interval) { 514 ts.tv_sec = interval / USEC_PER_MSEC; 515 ts.tv_nsec = (interval % USEC_PER_MSEC) * NSEC_PER_MSEC; 516 } else if (timeout) { 517 ts.tv_sec = timeout / USEC_PER_MSEC; 518 ts.tv_nsec = (timeout % USEC_PER_MSEC) * NSEC_PER_MSEC; 519 } else { 520 ts.tv_sec = 1; 521 ts.tv_nsec = 0; 522 } 523 524 if (forks) { 525 if (perf_evlist__prepare_workload(evsel_list, &target, argv, is_pipe, 526 workload_exec_failed_signal) < 0) { 527 perror("failed to prepare workload"); 528 return -1; 529 } 530 child_pid = evsel_list->workload.pid; 531 } 532 533 if (group) 534 perf_evlist__set_leader(evsel_list); 535 536 if (affinity__setup(&affinity) < 0) 537 return -1; 538 539 evlist__for_each_cpu (evsel_list, i, cpu) { 540 affinity__set(&affinity, cpu); 541 542 evlist__for_each_entry(evsel_list, counter) { 543 if (evsel__cpu_iter_skip(counter, cpu)) 544 continue; 545 if (counter->reset_group || counter->errored) 546 continue; 547 try_again: 548 if (create_perf_stat_counter(counter, &stat_config, &target, 549 counter->cpu_iter - 1) < 0) { 550 551 /* 552 * Weak group failed. We cannot just undo this here 553 * because earlier CPUs might be in group mode, and the kernel 554 * doesn't support mixing group and non group reads. Defer 555 * it to later. 556 * Don't close here because we're in the wrong affinity. 557 */ 558 if ((errno == EINVAL || errno == EBADF) && 559 counter->leader != counter && 560 counter->weak_group) { 561 perf_evlist__reset_weak_group(evsel_list, counter, false); 562 assert(counter->reset_group); 563 second_pass = true; 564 continue; 565 } 566 567 switch (stat_handle_error(counter)) { 568 case COUNTER_FATAL: 569 return -1; 570 case COUNTER_RETRY: 571 goto try_again; 572 case COUNTER_SKIP: 573 continue; 574 default: 575 break; 576 } 577 578 } 579 counter->supported = true; 580 } 581 } 582 583 if (second_pass) { 584 /* 585 * Now redo all the weak group after closing them, 586 * and also close errored counters. 587 */ 588 589 evlist__for_each_cpu(evsel_list, i, cpu) { 590 affinity__set(&affinity, cpu); 591 /* First close errored or weak retry */ 592 evlist__for_each_entry(evsel_list, counter) { 593 if (!counter->reset_group && !counter->errored) 594 continue; 595 if (evsel__cpu_iter_skip_no_inc(counter, cpu)) 596 continue; 597 perf_evsel__close_cpu(&counter->core, counter->cpu_iter); 598 } 599 /* Now reopen weak */ 600 evlist__for_each_entry(evsel_list, counter) { 601 if (!counter->reset_group && !counter->errored) 602 continue; 603 if (evsel__cpu_iter_skip(counter, cpu)) 604 continue; 605 if (!counter->reset_group) 606 continue; 607 try_again_reset: 608 pr_debug2("reopening weak %s\n", perf_evsel__name(counter)); 609 if (create_perf_stat_counter(counter, &stat_config, &target, 610 counter->cpu_iter - 1) < 0) { 611 612 switch (stat_handle_error(counter)) { 613 case COUNTER_FATAL: 614 return -1; 615 case COUNTER_RETRY: 616 goto try_again_reset; 617 case COUNTER_SKIP: 618 continue; 619 default: 620 break; 621 } 622 } 623 counter->supported = true; 624 } 625 } 626 } 627 affinity__cleanup(&affinity); 628 629 evlist__for_each_entry(evsel_list, counter) { 630 if (!counter->supported) { 631 perf_evsel__free_fd(&counter->core); 632 continue; 633 } 634 635 l = strlen(counter->unit); 636 if (l > stat_config.unit_width) 637 stat_config.unit_width = l; 638 639 if (perf_evsel__should_store_id(counter) && 640 perf_evsel__store_ids(counter, evsel_list)) 641 return -1; 642 } 643 644 if (perf_evlist__apply_filters(evsel_list, &counter)) { 645 pr_err("failed to set filter \"%s\" on event %s with %d (%s)\n", 646 counter->filter, perf_evsel__name(counter), errno, 647 str_error_r(errno, msg, sizeof(msg))); 648 return -1; 649 } 650 651 if (STAT_RECORD) { 652 int err, fd = perf_data__fd(&perf_stat.data); 653 654 if (is_pipe) { 655 err = perf_header__write_pipe(perf_data__fd(&perf_stat.data)); 656 } else { 657 err = perf_session__write_header(perf_stat.session, evsel_list, 658 fd, false); 659 } 660 661 if (err < 0) 662 return err; 663 664 err = perf_event__synthesize_stat_events(&stat_config, NULL, evsel_list, 665 process_synthesized_event, is_pipe); 666 if (err < 0) 667 return err; 668 } 669 670 /* 671 * Enable counters and exec the command: 672 */ 673 t0 = rdclock(); 674 clock_gettime(CLOCK_MONOTONIC, &ref_time); 675 676 if (forks) { 677 perf_evlist__start_workload(evsel_list); 678 enable_counters(); 679 680 if (interval || timeout) { 681 while (!waitpid(child_pid, &status, WNOHANG)) { 682 nanosleep(&ts, NULL); 683 if (timeout) 684 break; 685 process_interval(); 686 if (interval_count && !(--times)) 687 break; 688 } 689 } 690 if (child_pid != -1) { 691 if (timeout) 692 kill(child_pid, SIGTERM); 693 wait4(child_pid, &status, 0, &stat_config.ru_data); 694 } 695 696 if (workload_exec_errno) { 697 const char *emsg = str_error_r(workload_exec_errno, msg, sizeof(msg)); 698 pr_err("Workload failed: %s\n", emsg); 699 return -1; 700 } 701 702 if (WIFSIGNALED(status)) 703 psignal(WTERMSIG(status), argv[0]); 704 } else { 705 enable_counters(); 706 while (!done) { 707 nanosleep(&ts, NULL); 708 if (!is_target_alive(&target, evsel_list->core.threads)) 709 break; 710 if (timeout) 711 break; 712 if (interval) { 713 process_interval(); 714 if (interval_count && !(--times)) 715 break; 716 } 717 } 718 } 719 720 disable_counters(); 721 722 t1 = rdclock(); 723 724 if (stat_config.walltime_run_table) 725 stat_config.walltime_run[run_idx] = t1 - t0; 726 727 update_stats(&walltime_nsecs_stats, t1 - t0); 728 729 /* 730 * Closing a group leader splits the group, and as we only disable 731 * group leaders, results in remaining events becoming enabled. To 732 * avoid arbitrary skew, we must read all counters before closing any 733 * group leaders. 734 */ 735 read_counters(&(struct timespec) { .tv_nsec = t1-t0 }); 736 737 /* 738 * We need to keep evsel_list alive, because it's processed 739 * later the evsel_list will be closed after. 740 */ 741 if (!STAT_RECORD) 742 evlist__close(evsel_list); 743 744 return WEXITSTATUS(status); 745 } 746 747 static int run_perf_stat(int argc, const char **argv, int run_idx) 748 { 749 int ret; 750 751 if (pre_cmd) { 752 ret = system(pre_cmd); 753 if (ret) 754 return ret; 755 } 756 757 if (sync_run) 758 sync(); 759 760 ret = __run_perf_stat(argc, argv, run_idx); 761 if (ret) 762 return ret; 763 764 if (post_cmd) { 765 ret = system(post_cmd); 766 if (ret) 767 return ret; 768 } 769 770 return ret; 771 } 772 773 static void print_counters(struct timespec *ts, int argc, const char **argv) 774 { 775 /* Do not print anything if we record to the pipe. */ 776 if (STAT_RECORD && perf_stat.data.is_pipe) 777 return; 778 779 perf_evlist__print_counters(evsel_list, &stat_config, &target, 780 ts, argc, argv); 781 } 782 783 static volatile int signr = -1; 784 785 static void skip_signal(int signo) 786 { 787 if ((child_pid == -1) || stat_config.interval) 788 done = 1; 789 790 signr = signo; 791 /* 792 * render child_pid harmless 793 * won't send SIGTERM to a random 794 * process in case of race condition 795 * and fast PID recycling 796 */ 797 child_pid = -1; 798 } 799 800 static void sig_atexit(void) 801 { 802 sigset_t set, oset; 803 804 /* 805 * avoid race condition with SIGCHLD handler 806 * in skip_signal() which is modifying child_pid 807 * goal is to avoid send SIGTERM to a random 808 * process 809 */ 810 sigemptyset(&set); 811 sigaddset(&set, SIGCHLD); 812 sigprocmask(SIG_BLOCK, &set, &oset); 813 814 if (child_pid != -1) 815 kill(child_pid, SIGTERM); 816 817 sigprocmask(SIG_SETMASK, &oset, NULL); 818 819 if (signr == -1) 820 return; 821 822 signal(signr, SIG_DFL); 823 kill(getpid(), signr); 824 } 825 826 static int stat__set_big_num(const struct option *opt __maybe_unused, 827 const char *s __maybe_unused, int unset) 828 { 829 big_num_opt = unset ? 0 : 1; 830 return 0; 831 } 832 833 static int enable_metric_only(const struct option *opt __maybe_unused, 834 const char *s __maybe_unused, int unset) 835 { 836 force_metric_only = true; 837 stat_config.metric_only = !unset; 838 return 0; 839 } 840 841 static int parse_metric_groups(const struct option *opt, 842 const char *str, 843 int unset __maybe_unused) 844 { 845 return metricgroup__parse_groups(opt, str, &stat_config.metric_events); 846 } 847 848 static struct option stat_options[] = { 849 OPT_BOOLEAN('T', "transaction", &transaction_run, 850 "hardware transaction statistics"), 851 OPT_CALLBACK('e', "event", &evsel_list, "event", 852 "event selector. use 'perf list' to list available events", 853 parse_events_option), 854 OPT_CALLBACK(0, "filter", &evsel_list, "filter", 855 "event filter", parse_filter), 856 OPT_BOOLEAN('i', "no-inherit", &stat_config.no_inherit, 857 "child tasks do not inherit counters"), 858 OPT_STRING('p', "pid", &target.pid, "pid", 859 "stat events on existing process id"), 860 OPT_STRING('t', "tid", &target.tid, "tid", 861 "stat events on existing thread id"), 862 OPT_BOOLEAN('a', "all-cpus", &target.system_wide, 863 "system-wide collection from all CPUs"), 864 OPT_BOOLEAN('g', "group", &group, 865 "put the counters into a counter group"), 866 OPT_BOOLEAN(0, "scale", &stat_config.scale, 867 "Use --no-scale to disable counter scaling for multiplexing"), 868 OPT_INCR('v', "verbose", &verbose, 869 "be more verbose (show counter open errors, etc)"), 870 OPT_INTEGER('r', "repeat", &stat_config.run_count, 871 "repeat command and print average + stddev (max: 100, forever: 0)"), 872 OPT_BOOLEAN(0, "table", &stat_config.walltime_run_table, 873 "display details about each run (only with -r option)"), 874 OPT_BOOLEAN('n', "null", &stat_config.null_run, 875 "null run - dont start any counters"), 876 OPT_INCR('d', "detailed", &detailed_run, 877 "detailed run - start a lot of events"), 878 OPT_BOOLEAN('S', "sync", &sync_run, 879 "call sync() before starting a run"), 880 OPT_CALLBACK_NOOPT('B', "big-num", NULL, NULL, 881 "print large numbers with thousands\' separators", 882 stat__set_big_num), 883 OPT_STRING('C', "cpu", &target.cpu_list, "cpu", 884 "list of cpus to monitor in system-wide"), 885 OPT_SET_UINT('A', "no-aggr", &stat_config.aggr_mode, 886 "disable CPU count aggregation", AGGR_NONE), 887 OPT_BOOLEAN(0, "no-merge", &stat_config.no_merge, "Do not merge identical named events"), 888 OPT_STRING('x', "field-separator", &stat_config.csv_sep, "separator", 889 "print counts with custom separator"), 890 OPT_CALLBACK('G', "cgroup", &evsel_list, "name", 891 "monitor event in cgroup name only", parse_cgroups), 892 OPT_STRING('o', "output", &output_name, "file", "output file name"), 893 OPT_BOOLEAN(0, "append", &append_file, "append to the output file"), 894 OPT_INTEGER(0, "log-fd", &output_fd, 895 "log output to fd, instead of stderr"), 896 OPT_STRING(0, "pre", &pre_cmd, "command", 897 "command to run prior to the measured command"), 898 OPT_STRING(0, "post", &post_cmd, "command", 899 "command to run after to the measured command"), 900 OPT_UINTEGER('I', "interval-print", &stat_config.interval, 901 "print counts at regular interval in ms " 902 "(overhead is possible for values <= 100ms)"), 903 OPT_INTEGER(0, "interval-count", &stat_config.times, 904 "print counts for fixed number of times"), 905 OPT_BOOLEAN(0, "interval-clear", &stat_config.interval_clear, 906 "clear screen in between new interval"), 907 OPT_UINTEGER(0, "timeout", &stat_config.timeout, 908 "stop workload and print counts after a timeout period in ms (>= 10ms)"), 909 OPT_SET_UINT(0, "per-socket", &stat_config.aggr_mode, 910 "aggregate counts per processor socket", AGGR_SOCKET), 911 OPT_SET_UINT(0, "per-die", &stat_config.aggr_mode, 912 "aggregate counts per processor die", AGGR_DIE), 913 OPT_SET_UINT(0, "per-core", &stat_config.aggr_mode, 914 "aggregate counts per physical processor core", AGGR_CORE), 915 OPT_SET_UINT(0, "per-thread", &stat_config.aggr_mode, 916 "aggregate counts per thread", AGGR_THREAD), 917 OPT_SET_UINT(0, "per-node", &stat_config.aggr_mode, 918 "aggregate counts per numa node", AGGR_NODE), 919 OPT_UINTEGER('D', "delay", &stat_config.initial_delay, 920 "ms to wait before starting measurement after program start"), 921 OPT_CALLBACK_NOOPT(0, "metric-only", &stat_config.metric_only, NULL, 922 "Only print computed metrics. No raw values", enable_metric_only), 923 OPT_BOOLEAN(0, "topdown", &topdown_run, 924 "measure topdown level 1 statistics"), 925 OPT_BOOLEAN(0, "smi-cost", &smi_cost, 926 "measure SMI cost"), 927 OPT_CALLBACK('M', "metrics", &evsel_list, "metric/metric group list", 928 "monitor specified metrics or metric groups (separated by ,)", 929 parse_metric_groups), 930 OPT_BOOLEAN_FLAG(0, "all-kernel", &stat_config.all_kernel, 931 "Configure all used events to run in kernel space.", 932 PARSE_OPT_EXCLUSIVE), 933 OPT_BOOLEAN_FLAG(0, "all-user", &stat_config.all_user, 934 "Configure all used events to run in user space.", 935 PARSE_OPT_EXCLUSIVE), 936 OPT_BOOLEAN(0, "percore-show-thread", &stat_config.percore_show_thread, 937 "Use with 'percore' event qualifier to show the event " 938 "counts of one hardware thread by sum up total hardware " 939 "threads of same physical core"), 940 OPT_END() 941 }; 942 943 static int perf_stat__get_socket(struct perf_stat_config *config __maybe_unused, 944 struct perf_cpu_map *map, int cpu) 945 { 946 return cpu_map__get_socket(map, cpu, NULL); 947 } 948 949 static int perf_stat__get_die(struct perf_stat_config *config __maybe_unused, 950 struct perf_cpu_map *map, int cpu) 951 { 952 return cpu_map__get_die(map, cpu, NULL); 953 } 954 955 static int perf_stat__get_core(struct perf_stat_config *config __maybe_unused, 956 struct perf_cpu_map *map, int cpu) 957 { 958 return cpu_map__get_core(map, cpu, NULL); 959 } 960 961 static int perf_stat__get_node(struct perf_stat_config *config __maybe_unused, 962 struct perf_cpu_map *map, int cpu) 963 { 964 return cpu_map__get_node(map, cpu, NULL); 965 } 966 967 static int perf_stat__get_aggr(struct perf_stat_config *config, 968 aggr_get_id_t get_id, struct perf_cpu_map *map, int idx) 969 { 970 int cpu; 971 972 if (idx >= map->nr) 973 return -1; 974 975 cpu = map->map[idx]; 976 977 if (config->cpus_aggr_map->map[cpu] == -1) 978 config->cpus_aggr_map->map[cpu] = get_id(config, map, idx); 979 980 return config->cpus_aggr_map->map[cpu]; 981 } 982 983 static int perf_stat__get_socket_cached(struct perf_stat_config *config, 984 struct perf_cpu_map *map, int idx) 985 { 986 return perf_stat__get_aggr(config, perf_stat__get_socket, map, idx); 987 } 988 989 static int perf_stat__get_die_cached(struct perf_stat_config *config, 990 struct perf_cpu_map *map, int idx) 991 { 992 return perf_stat__get_aggr(config, perf_stat__get_die, map, idx); 993 } 994 995 static int perf_stat__get_core_cached(struct perf_stat_config *config, 996 struct perf_cpu_map *map, int idx) 997 { 998 return perf_stat__get_aggr(config, perf_stat__get_core, map, idx); 999 } 1000 1001 static int perf_stat__get_node_cached(struct perf_stat_config *config, 1002 struct perf_cpu_map *map, int idx) 1003 { 1004 return perf_stat__get_aggr(config, perf_stat__get_node, map, idx); 1005 } 1006 1007 static bool term_percore_set(void) 1008 { 1009 struct evsel *counter; 1010 1011 evlist__for_each_entry(evsel_list, counter) { 1012 if (counter->percore) 1013 return true; 1014 } 1015 1016 return false; 1017 } 1018 1019 static int perf_stat_init_aggr_mode(void) 1020 { 1021 int nr; 1022 1023 switch (stat_config.aggr_mode) { 1024 case AGGR_SOCKET: 1025 if (cpu_map__build_socket_map(evsel_list->core.cpus, &stat_config.aggr_map)) { 1026 perror("cannot build socket map"); 1027 return -1; 1028 } 1029 stat_config.aggr_get_id = perf_stat__get_socket_cached; 1030 break; 1031 case AGGR_DIE: 1032 if (cpu_map__build_die_map(evsel_list->core.cpus, &stat_config.aggr_map)) { 1033 perror("cannot build die map"); 1034 return -1; 1035 } 1036 stat_config.aggr_get_id = perf_stat__get_die_cached; 1037 break; 1038 case AGGR_CORE: 1039 if (cpu_map__build_core_map(evsel_list->core.cpus, &stat_config.aggr_map)) { 1040 perror("cannot build core map"); 1041 return -1; 1042 } 1043 stat_config.aggr_get_id = perf_stat__get_core_cached; 1044 break; 1045 case AGGR_NODE: 1046 if (cpu_map__build_node_map(evsel_list->core.cpus, &stat_config.aggr_map)) { 1047 perror("cannot build core map"); 1048 return -1; 1049 } 1050 stat_config.aggr_get_id = perf_stat__get_node_cached; 1051 break; 1052 case AGGR_NONE: 1053 if (term_percore_set()) { 1054 if (cpu_map__build_core_map(evsel_list->core.cpus, 1055 &stat_config.aggr_map)) { 1056 perror("cannot build core map"); 1057 return -1; 1058 } 1059 stat_config.aggr_get_id = perf_stat__get_core_cached; 1060 } 1061 break; 1062 case AGGR_GLOBAL: 1063 case AGGR_THREAD: 1064 case AGGR_UNSET: 1065 default: 1066 break; 1067 } 1068 1069 /* 1070 * The evsel_list->cpus is the base we operate on, 1071 * taking the highest cpu number to be the size of 1072 * the aggregation translate cpumap. 1073 */ 1074 nr = perf_cpu_map__max(evsel_list->core.cpus); 1075 stat_config.cpus_aggr_map = perf_cpu_map__empty_new(nr + 1); 1076 return stat_config.cpus_aggr_map ? 0 : -ENOMEM; 1077 } 1078 1079 static void perf_stat__exit_aggr_mode(void) 1080 { 1081 perf_cpu_map__put(stat_config.aggr_map); 1082 perf_cpu_map__put(stat_config.cpus_aggr_map); 1083 stat_config.aggr_map = NULL; 1084 stat_config.cpus_aggr_map = NULL; 1085 } 1086 1087 static inline int perf_env__get_cpu(struct perf_env *env, struct perf_cpu_map *map, int idx) 1088 { 1089 int cpu; 1090 1091 if (idx > map->nr) 1092 return -1; 1093 1094 cpu = map->map[idx]; 1095 1096 if (cpu >= env->nr_cpus_avail) 1097 return -1; 1098 1099 return cpu; 1100 } 1101 1102 static int perf_env__get_socket(struct perf_cpu_map *map, int idx, void *data) 1103 { 1104 struct perf_env *env = data; 1105 int cpu = perf_env__get_cpu(env, map, idx); 1106 1107 return cpu == -1 ? -1 : env->cpu[cpu].socket_id; 1108 } 1109 1110 static int perf_env__get_die(struct perf_cpu_map *map, int idx, void *data) 1111 { 1112 struct perf_env *env = data; 1113 int die_id = -1, cpu = perf_env__get_cpu(env, map, idx); 1114 1115 if (cpu != -1) { 1116 /* 1117 * Encode socket in bit range 15:8 1118 * die_id is relative to socket, 1119 * we need a global id. So we combine 1120 * socket + die id 1121 */ 1122 if (WARN_ONCE(env->cpu[cpu].socket_id >> 8, "The socket id number is too big.\n")) 1123 return -1; 1124 1125 if (WARN_ONCE(env->cpu[cpu].die_id >> 8, "The die id number is too big.\n")) 1126 return -1; 1127 1128 die_id = (env->cpu[cpu].socket_id << 8) | (env->cpu[cpu].die_id & 0xff); 1129 } 1130 1131 return die_id; 1132 } 1133 1134 static int perf_env__get_core(struct perf_cpu_map *map, int idx, void *data) 1135 { 1136 struct perf_env *env = data; 1137 int core = -1, cpu = perf_env__get_cpu(env, map, idx); 1138 1139 if (cpu != -1) { 1140 /* 1141 * Encode socket in bit range 31:24 1142 * encode die id in bit range 23:16 1143 * core_id is relative to socket and die, 1144 * we need a global id. So we combine 1145 * socket + die id + core id 1146 */ 1147 if (WARN_ONCE(env->cpu[cpu].socket_id >> 8, "The socket id number is too big.\n")) 1148 return -1; 1149 1150 if (WARN_ONCE(env->cpu[cpu].die_id >> 8, "The die id number is too big.\n")) 1151 return -1; 1152 1153 if (WARN_ONCE(env->cpu[cpu].core_id >> 16, "The core id number is too big.\n")) 1154 return -1; 1155 1156 core = (env->cpu[cpu].socket_id << 24) | 1157 (env->cpu[cpu].die_id << 16) | 1158 (env->cpu[cpu].core_id & 0xffff); 1159 } 1160 1161 return core; 1162 } 1163 1164 static int perf_env__get_node(struct perf_cpu_map *map, int idx, void *data) 1165 { 1166 int cpu = perf_env__get_cpu(data, map, idx); 1167 1168 return perf_env__numa_node(data, cpu); 1169 } 1170 1171 static int perf_env__build_socket_map(struct perf_env *env, struct perf_cpu_map *cpus, 1172 struct perf_cpu_map **sockp) 1173 { 1174 return cpu_map__build_map(cpus, sockp, perf_env__get_socket, env); 1175 } 1176 1177 static int perf_env__build_die_map(struct perf_env *env, struct perf_cpu_map *cpus, 1178 struct perf_cpu_map **diep) 1179 { 1180 return cpu_map__build_map(cpus, diep, perf_env__get_die, env); 1181 } 1182 1183 static int perf_env__build_core_map(struct perf_env *env, struct perf_cpu_map *cpus, 1184 struct perf_cpu_map **corep) 1185 { 1186 return cpu_map__build_map(cpus, corep, perf_env__get_core, env); 1187 } 1188 1189 static int perf_env__build_node_map(struct perf_env *env, struct perf_cpu_map *cpus, 1190 struct perf_cpu_map **nodep) 1191 { 1192 return cpu_map__build_map(cpus, nodep, perf_env__get_node, env); 1193 } 1194 1195 static int perf_stat__get_socket_file(struct perf_stat_config *config __maybe_unused, 1196 struct perf_cpu_map *map, int idx) 1197 { 1198 return perf_env__get_socket(map, idx, &perf_stat.session->header.env); 1199 } 1200 static int perf_stat__get_die_file(struct perf_stat_config *config __maybe_unused, 1201 struct perf_cpu_map *map, int idx) 1202 { 1203 return perf_env__get_die(map, idx, &perf_stat.session->header.env); 1204 } 1205 1206 static int perf_stat__get_core_file(struct perf_stat_config *config __maybe_unused, 1207 struct perf_cpu_map *map, int idx) 1208 { 1209 return perf_env__get_core(map, idx, &perf_stat.session->header.env); 1210 } 1211 1212 static int perf_stat__get_node_file(struct perf_stat_config *config __maybe_unused, 1213 struct perf_cpu_map *map, int idx) 1214 { 1215 return perf_env__get_node(map, idx, &perf_stat.session->header.env); 1216 } 1217 1218 static int perf_stat_init_aggr_mode_file(struct perf_stat *st) 1219 { 1220 struct perf_env *env = &st->session->header.env; 1221 1222 switch (stat_config.aggr_mode) { 1223 case AGGR_SOCKET: 1224 if (perf_env__build_socket_map(env, evsel_list->core.cpus, &stat_config.aggr_map)) { 1225 perror("cannot build socket map"); 1226 return -1; 1227 } 1228 stat_config.aggr_get_id = perf_stat__get_socket_file; 1229 break; 1230 case AGGR_DIE: 1231 if (perf_env__build_die_map(env, evsel_list->core.cpus, &stat_config.aggr_map)) { 1232 perror("cannot build die map"); 1233 return -1; 1234 } 1235 stat_config.aggr_get_id = perf_stat__get_die_file; 1236 break; 1237 case AGGR_CORE: 1238 if (perf_env__build_core_map(env, evsel_list->core.cpus, &stat_config.aggr_map)) { 1239 perror("cannot build core map"); 1240 return -1; 1241 } 1242 stat_config.aggr_get_id = perf_stat__get_core_file; 1243 break; 1244 case AGGR_NODE: 1245 if (perf_env__build_node_map(env, evsel_list->core.cpus, &stat_config.aggr_map)) { 1246 perror("cannot build core map"); 1247 return -1; 1248 } 1249 stat_config.aggr_get_id = perf_stat__get_node_file; 1250 break; 1251 case AGGR_NONE: 1252 case AGGR_GLOBAL: 1253 case AGGR_THREAD: 1254 case AGGR_UNSET: 1255 default: 1256 break; 1257 } 1258 1259 return 0; 1260 } 1261 1262 static int topdown_filter_events(const char **attr, char **str, bool use_group) 1263 { 1264 int off = 0; 1265 int i; 1266 int len = 0; 1267 char *s; 1268 1269 for (i = 0; attr[i]; i++) { 1270 if (pmu_have_event("cpu", attr[i])) { 1271 len += strlen(attr[i]) + 1; 1272 attr[i - off] = attr[i]; 1273 } else 1274 off++; 1275 } 1276 attr[i - off] = NULL; 1277 1278 *str = malloc(len + 1 + 2); 1279 if (!*str) 1280 return -1; 1281 s = *str; 1282 if (i - off == 0) { 1283 *s = 0; 1284 return 0; 1285 } 1286 if (use_group) 1287 *s++ = '{'; 1288 for (i = 0; attr[i]; i++) { 1289 strcpy(s, attr[i]); 1290 s += strlen(s); 1291 *s++ = ','; 1292 } 1293 if (use_group) { 1294 s[-1] = '}'; 1295 *s = 0; 1296 } else 1297 s[-1] = 0; 1298 return 0; 1299 } 1300 1301 __weak bool arch_topdown_check_group(bool *warn) 1302 { 1303 *warn = false; 1304 return false; 1305 } 1306 1307 __weak void arch_topdown_group_warn(void) 1308 { 1309 } 1310 1311 /* 1312 * Add default attributes, if there were no attributes specified or 1313 * if -d/--detailed, -d -d or -d -d -d is used: 1314 */ 1315 static int add_default_attributes(void) 1316 { 1317 int err; 1318 struct perf_event_attr default_attrs0[] = { 1319 1320 { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_TASK_CLOCK }, 1321 { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_CONTEXT_SWITCHES }, 1322 { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_CPU_MIGRATIONS }, 1323 { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_PAGE_FAULTS }, 1324 1325 { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_CPU_CYCLES }, 1326 }; 1327 struct perf_event_attr frontend_attrs[] = { 1328 { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_STALLED_CYCLES_FRONTEND }, 1329 }; 1330 struct perf_event_attr backend_attrs[] = { 1331 { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_STALLED_CYCLES_BACKEND }, 1332 }; 1333 struct perf_event_attr default_attrs1[] = { 1334 { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_INSTRUCTIONS }, 1335 { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_BRANCH_INSTRUCTIONS }, 1336 { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_BRANCH_MISSES }, 1337 1338 }; 1339 1340 /* 1341 * Detailed stats (-d), covering the L1 and last level data caches: 1342 */ 1343 struct perf_event_attr detailed_attrs[] = { 1344 1345 { .type = PERF_TYPE_HW_CACHE, 1346 .config = 1347 PERF_COUNT_HW_CACHE_L1D << 0 | 1348 (PERF_COUNT_HW_CACHE_OP_READ << 8) | 1349 (PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16) }, 1350 1351 { .type = PERF_TYPE_HW_CACHE, 1352 .config = 1353 PERF_COUNT_HW_CACHE_L1D << 0 | 1354 (PERF_COUNT_HW_CACHE_OP_READ << 8) | 1355 (PERF_COUNT_HW_CACHE_RESULT_MISS << 16) }, 1356 1357 { .type = PERF_TYPE_HW_CACHE, 1358 .config = 1359 PERF_COUNT_HW_CACHE_LL << 0 | 1360 (PERF_COUNT_HW_CACHE_OP_READ << 8) | 1361 (PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16) }, 1362 1363 { .type = PERF_TYPE_HW_CACHE, 1364 .config = 1365 PERF_COUNT_HW_CACHE_LL << 0 | 1366 (PERF_COUNT_HW_CACHE_OP_READ << 8) | 1367 (PERF_COUNT_HW_CACHE_RESULT_MISS << 16) }, 1368 }; 1369 1370 /* 1371 * Very detailed stats (-d -d), covering the instruction cache and the TLB caches: 1372 */ 1373 struct perf_event_attr very_detailed_attrs[] = { 1374 1375 { .type = PERF_TYPE_HW_CACHE, 1376 .config = 1377 PERF_COUNT_HW_CACHE_L1I << 0 | 1378 (PERF_COUNT_HW_CACHE_OP_READ << 8) | 1379 (PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16) }, 1380 1381 { .type = PERF_TYPE_HW_CACHE, 1382 .config = 1383 PERF_COUNT_HW_CACHE_L1I << 0 | 1384 (PERF_COUNT_HW_CACHE_OP_READ << 8) | 1385 (PERF_COUNT_HW_CACHE_RESULT_MISS << 16) }, 1386 1387 { .type = PERF_TYPE_HW_CACHE, 1388 .config = 1389 PERF_COUNT_HW_CACHE_DTLB << 0 | 1390 (PERF_COUNT_HW_CACHE_OP_READ << 8) | 1391 (PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16) }, 1392 1393 { .type = PERF_TYPE_HW_CACHE, 1394 .config = 1395 PERF_COUNT_HW_CACHE_DTLB << 0 | 1396 (PERF_COUNT_HW_CACHE_OP_READ << 8) | 1397 (PERF_COUNT_HW_CACHE_RESULT_MISS << 16) }, 1398 1399 { .type = PERF_TYPE_HW_CACHE, 1400 .config = 1401 PERF_COUNT_HW_CACHE_ITLB << 0 | 1402 (PERF_COUNT_HW_CACHE_OP_READ << 8) | 1403 (PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16) }, 1404 1405 { .type = PERF_TYPE_HW_CACHE, 1406 .config = 1407 PERF_COUNT_HW_CACHE_ITLB << 0 | 1408 (PERF_COUNT_HW_CACHE_OP_READ << 8) | 1409 (PERF_COUNT_HW_CACHE_RESULT_MISS << 16) }, 1410 1411 }; 1412 1413 /* 1414 * Very, very detailed stats (-d -d -d), adding prefetch events: 1415 */ 1416 struct perf_event_attr very_very_detailed_attrs[] = { 1417 1418 { .type = PERF_TYPE_HW_CACHE, 1419 .config = 1420 PERF_COUNT_HW_CACHE_L1D << 0 | 1421 (PERF_COUNT_HW_CACHE_OP_PREFETCH << 8) | 1422 (PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16) }, 1423 1424 { .type = PERF_TYPE_HW_CACHE, 1425 .config = 1426 PERF_COUNT_HW_CACHE_L1D << 0 | 1427 (PERF_COUNT_HW_CACHE_OP_PREFETCH << 8) | 1428 (PERF_COUNT_HW_CACHE_RESULT_MISS << 16) }, 1429 }; 1430 struct parse_events_error errinfo; 1431 1432 /* Set attrs if no event is selected and !null_run: */ 1433 if (stat_config.null_run) 1434 return 0; 1435 1436 bzero(&errinfo, sizeof(errinfo)); 1437 if (transaction_run) { 1438 /* Handle -T as -M transaction. Once platform specific metrics 1439 * support has been added to the json files, all archictures 1440 * will use this approach. To determine transaction support 1441 * on an architecture test for such a metric name. 1442 */ 1443 if (metricgroup__has_metric("transaction")) { 1444 struct option opt = { .value = &evsel_list }; 1445 1446 return metricgroup__parse_groups(&opt, "transaction", 1447 &stat_config.metric_events); 1448 } 1449 1450 if (pmu_have_event("cpu", "cycles-ct") && 1451 pmu_have_event("cpu", "el-start")) 1452 err = parse_events(evsel_list, transaction_attrs, 1453 &errinfo); 1454 else 1455 err = parse_events(evsel_list, 1456 transaction_limited_attrs, 1457 &errinfo); 1458 if (err) { 1459 fprintf(stderr, "Cannot set up transaction events\n"); 1460 parse_events_print_error(&errinfo, transaction_attrs); 1461 return -1; 1462 } 1463 return 0; 1464 } 1465 1466 if (smi_cost) { 1467 int smi; 1468 1469 if (sysfs__read_int(FREEZE_ON_SMI_PATH, &smi) < 0) { 1470 fprintf(stderr, "freeze_on_smi is not supported.\n"); 1471 return -1; 1472 } 1473 1474 if (!smi) { 1475 if (sysfs__write_int(FREEZE_ON_SMI_PATH, 1) < 0) { 1476 fprintf(stderr, "Failed to set freeze_on_smi.\n"); 1477 return -1; 1478 } 1479 smi_reset = true; 1480 } 1481 1482 if (pmu_have_event("msr", "aperf") && 1483 pmu_have_event("msr", "smi")) { 1484 if (!force_metric_only) 1485 stat_config.metric_only = true; 1486 err = parse_events(evsel_list, smi_cost_attrs, &errinfo); 1487 } else { 1488 fprintf(stderr, "To measure SMI cost, it needs " 1489 "msr/aperf/, msr/smi/ and cpu/cycles/ support\n"); 1490 parse_events_print_error(&errinfo, smi_cost_attrs); 1491 return -1; 1492 } 1493 if (err) { 1494 parse_events_print_error(&errinfo, smi_cost_attrs); 1495 fprintf(stderr, "Cannot set up SMI cost events\n"); 1496 return -1; 1497 } 1498 return 0; 1499 } 1500 1501 if (topdown_run) { 1502 char *str = NULL; 1503 bool warn = false; 1504 1505 if (stat_config.aggr_mode != AGGR_GLOBAL && 1506 stat_config.aggr_mode != AGGR_CORE) { 1507 pr_err("top down event configuration requires --per-core mode\n"); 1508 return -1; 1509 } 1510 stat_config.aggr_mode = AGGR_CORE; 1511 if (nr_cgroups || !target__has_cpu(&target)) { 1512 pr_err("top down event configuration requires system-wide mode (-a)\n"); 1513 return -1; 1514 } 1515 1516 if (!force_metric_only) 1517 stat_config.metric_only = true; 1518 if (topdown_filter_events(topdown_attrs, &str, 1519 arch_topdown_check_group(&warn)) < 0) { 1520 pr_err("Out of memory\n"); 1521 return -1; 1522 } 1523 if (topdown_attrs[0] && str) { 1524 if (warn) 1525 arch_topdown_group_warn(); 1526 err = parse_events(evsel_list, str, &errinfo); 1527 if (err) { 1528 fprintf(stderr, 1529 "Cannot set up top down events %s: %d\n", 1530 str, err); 1531 parse_events_print_error(&errinfo, str); 1532 free(str); 1533 return -1; 1534 } 1535 } else { 1536 fprintf(stderr, "System does not support topdown\n"); 1537 return -1; 1538 } 1539 free(str); 1540 } 1541 1542 if (!evsel_list->core.nr_entries) { 1543 if (target__has_cpu(&target)) 1544 default_attrs0[0].config = PERF_COUNT_SW_CPU_CLOCK; 1545 1546 if (perf_evlist__add_default_attrs(evsel_list, default_attrs0) < 0) 1547 return -1; 1548 if (pmu_have_event("cpu", "stalled-cycles-frontend")) { 1549 if (perf_evlist__add_default_attrs(evsel_list, 1550 frontend_attrs) < 0) 1551 return -1; 1552 } 1553 if (pmu_have_event("cpu", "stalled-cycles-backend")) { 1554 if (perf_evlist__add_default_attrs(evsel_list, 1555 backend_attrs) < 0) 1556 return -1; 1557 } 1558 if (perf_evlist__add_default_attrs(evsel_list, default_attrs1) < 0) 1559 return -1; 1560 } 1561 1562 /* Detailed events get appended to the event list: */ 1563 1564 if (detailed_run < 1) 1565 return 0; 1566 1567 /* Append detailed run extra attributes: */ 1568 if (perf_evlist__add_default_attrs(evsel_list, detailed_attrs) < 0) 1569 return -1; 1570 1571 if (detailed_run < 2) 1572 return 0; 1573 1574 /* Append very detailed run extra attributes: */ 1575 if (perf_evlist__add_default_attrs(evsel_list, very_detailed_attrs) < 0) 1576 return -1; 1577 1578 if (detailed_run < 3) 1579 return 0; 1580 1581 /* Append very, very detailed run extra attributes: */ 1582 return perf_evlist__add_default_attrs(evsel_list, very_very_detailed_attrs); 1583 } 1584 1585 static const char * const stat_record_usage[] = { 1586 "perf stat record [<options>]", 1587 NULL, 1588 }; 1589 1590 static void init_features(struct perf_session *session) 1591 { 1592 int feat; 1593 1594 for (feat = HEADER_FIRST_FEATURE; feat < HEADER_LAST_FEATURE; feat++) 1595 perf_header__set_feat(&session->header, feat); 1596 1597 perf_header__clear_feat(&session->header, HEADER_DIR_FORMAT); 1598 perf_header__clear_feat(&session->header, HEADER_BUILD_ID); 1599 perf_header__clear_feat(&session->header, HEADER_TRACING_DATA); 1600 perf_header__clear_feat(&session->header, HEADER_BRANCH_STACK); 1601 perf_header__clear_feat(&session->header, HEADER_AUXTRACE); 1602 } 1603 1604 static int __cmd_record(int argc, const char **argv) 1605 { 1606 struct perf_session *session; 1607 struct perf_data *data = &perf_stat.data; 1608 1609 argc = parse_options(argc, argv, stat_options, stat_record_usage, 1610 PARSE_OPT_STOP_AT_NON_OPTION); 1611 1612 if (output_name) 1613 data->path = output_name; 1614 1615 if (stat_config.run_count != 1 || forever) { 1616 pr_err("Cannot use -r option with perf stat record.\n"); 1617 return -1; 1618 } 1619 1620 session = perf_session__new(data, false, NULL); 1621 if (IS_ERR(session)) { 1622 pr_err("Perf session creation failed\n"); 1623 return PTR_ERR(session); 1624 } 1625 1626 init_features(session); 1627 1628 session->evlist = evsel_list; 1629 perf_stat.session = session; 1630 perf_stat.record = true; 1631 return argc; 1632 } 1633 1634 static int process_stat_round_event(struct perf_session *session, 1635 union perf_event *event) 1636 { 1637 struct perf_record_stat_round *stat_round = &event->stat_round; 1638 struct evsel *counter; 1639 struct timespec tsh, *ts = NULL; 1640 const char **argv = session->header.env.cmdline_argv; 1641 int argc = session->header.env.nr_cmdline; 1642 1643 evlist__for_each_entry(evsel_list, counter) 1644 perf_stat_process_counter(&stat_config, counter); 1645 1646 if (stat_round->type == PERF_STAT_ROUND_TYPE__FINAL) 1647 update_stats(&walltime_nsecs_stats, stat_round->time); 1648 1649 if (stat_config.interval && stat_round->time) { 1650 tsh.tv_sec = stat_round->time / NSEC_PER_SEC; 1651 tsh.tv_nsec = stat_round->time % NSEC_PER_SEC; 1652 ts = &tsh; 1653 } 1654 1655 print_counters(ts, argc, argv); 1656 return 0; 1657 } 1658 1659 static 1660 int process_stat_config_event(struct perf_session *session, 1661 union perf_event *event) 1662 { 1663 struct perf_tool *tool = session->tool; 1664 struct perf_stat *st = container_of(tool, struct perf_stat, tool); 1665 1666 perf_event__read_stat_config(&stat_config, &event->stat_config); 1667 1668 if (perf_cpu_map__empty(st->cpus)) { 1669 if (st->aggr_mode != AGGR_UNSET) 1670 pr_warning("warning: processing task data, aggregation mode not set\n"); 1671 return 0; 1672 } 1673 1674 if (st->aggr_mode != AGGR_UNSET) 1675 stat_config.aggr_mode = st->aggr_mode; 1676 1677 if (perf_stat.data.is_pipe) 1678 perf_stat_init_aggr_mode(); 1679 else 1680 perf_stat_init_aggr_mode_file(st); 1681 1682 return 0; 1683 } 1684 1685 static int set_maps(struct perf_stat *st) 1686 { 1687 if (!st->cpus || !st->threads) 1688 return 0; 1689 1690 if (WARN_ONCE(st->maps_allocated, "stats double allocation\n")) 1691 return -EINVAL; 1692 1693 perf_evlist__set_maps(&evsel_list->core, st->cpus, st->threads); 1694 1695 if (perf_evlist__alloc_stats(evsel_list, true)) 1696 return -ENOMEM; 1697 1698 st->maps_allocated = true; 1699 return 0; 1700 } 1701 1702 static 1703 int process_thread_map_event(struct perf_session *session, 1704 union perf_event *event) 1705 { 1706 struct perf_tool *tool = session->tool; 1707 struct perf_stat *st = container_of(tool, struct perf_stat, tool); 1708 1709 if (st->threads) { 1710 pr_warning("Extra thread map event, ignoring.\n"); 1711 return 0; 1712 } 1713 1714 st->threads = thread_map__new_event(&event->thread_map); 1715 if (!st->threads) 1716 return -ENOMEM; 1717 1718 return set_maps(st); 1719 } 1720 1721 static 1722 int process_cpu_map_event(struct perf_session *session, 1723 union perf_event *event) 1724 { 1725 struct perf_tool *tool = session->tool; 1726 struct perf_stat *st = container_of(tool, struct perf_stat, tool); 1727 struct perf_cpu_map *cpus; 1728 1729 if (st->cpus) { 1730 pr_warning("Extra cpu map event, ignoring.\n"); 1731 return 0; 1732 } 1733 1734 cpus = cpu_map__new_data(&event->cpu_map.data); 1735 if (!cpus) 1736 return -ENOMEM; 1737 1738 st->cpus = cpus; 1739 return set_maps(st); 1740 } 1741 1742 static int runtime_stat_new(struct perf_stat_config *config, int nthreads) 1743 { 1744 int i; 1745 1746 config->stats = calloc(nthreads, sizeof(struct runtime_stat)); 1747 if (!config->stats) 1748 return -1; 1749 1750 config->stats_num = nthreads; 1751 1752 for (i = 0; i < nthreads; i++) 1753 runtime_stat__init(&config->stats[i]); 1754 1755 return 0; 1756 } 1757 1758 static void runtime_stat_delete(struct perf_stat_config *config) 1759 { 1760 int i; 1761 1762 if (!config->stats) 1763 return; 1764 1765 for (i = 0; i < config->stats_num; i++) 1766 runtime_stat__exit(&config->stats[i]); 1767 1768 zfree(&config->stats); 1769 } 1770 1771 static const char * const stat_report_usage[] = { 1772 "perf stat report [<options>]", 1773 NULL, 1774 }; 1775 1776 static struct perf_stat perf_stat = { 1777 .tool = { 1778 .attr = perf_event__process_attr, 1779 .event_update = perf_event__process_event_update, 1780 .thread_map = process_thread_map_event, 1781 .cpu_map = process_cpu_map_event, 1782 .stat_config = process_stat_config_event, 1783 .stat = perf_event__process_stat_event, 1784 .stat_round = process_stat_round_event, 1785 }, 1786 .aggr_mode = AGGR_UNSET, 1787 }; 1788 1789 static int __cmd_report(int argc, const char **argv) 1790 { 1791 struct perf_session *session; 1792 const struct option options[] = { 1793 OPT_STRING('i', "input", &input_name, "file", "input file name"), 1794 OPT_SET_UINT(0, "per-socket", &perf_stat.aggr_mode, 1795 "aggregate counts per processor socket", AGGR_SOCKET), 1796 OPT_SET_UINT(0, "per-die", &perf_stat.aggr_mode, 1797 "aggregate counts per processor die", AGGR_DIE), 1798 OPT_SET_UINT(0, "per-core", &perf_stat.aggr_mode, 1799 "aggregate counts per physical processor core", AGGR_CORE), 1800 OPT_SET_UINT(0, "per-node", &perf_stat.aggr_mode, 1801 "aggregate counts per numa node", AGGR_NODE), 1802 OPT_SET_UINT('A', "no-aggr", &perf_stat.aggr_mode, 1803 "disable CPU count aggregation", AGGR_NONE), 1804 OPT_END() 1805 }; 1806 struct stat st; 1807 int ret; 1808 1809 argc = parse_options(argc, argv, options, stat_report_usage, 0); 1810 1811 if (!input_name || !strlen(input_name)) { 1812 if (!fstat(STDIN_FILENO, &st) && S_ISFIFO(st.st_mode)) 1813 input_name = "-"; 1814 else 1815 input_name = "perf.data"; 1816 } 1817 1818 perf_stat.data.path = input_name; 1819 perf_stat.data.mode = PERF_DATA_MODE_READ; 1820 1821 session = perf_session__new(&perf_stat.data, false, &perf_stat.tool); 1822 if (IS_ERR(session)) 1823 return PTR_ERR(session); 1824 1825 perf_stat.session = session; 1826 stat_config.output = stderr; 1827 evsel_list = session->evlist; 1828 1829 ret = perf_session__process_events(session); 1830 if (ret) 1831 return ret; 1832 1833 perf_session__delete(session); 1834 return 0; 1835 } 1836 1837 static void setup_system_wide(int forks) 1838 { 1839 /* 1840 * Make system wide (-a) the default target if 1841 * no target was specified and one of following 1842 * conditions is met: 1843 * 1844 * - there's no workload specified 1845 * - there is workload specified but all requested 1846 * events are system wide events 1847 */ 1848 if (!target__none(&target)) 1849 return; 1850 1851 if (!forks) 1852 target.system_wide = true; 1853 else { 1854 struct evsel *counter; 1855 1856 evlist__for_each_entry(evsel_list, counter) { 1857 if (!counter->core.system_wide) 1858 return; 1859 } 1860 1861 if (evsel_list->core.nr_entries) 1862 target.system_wide = true; 1863 } 1864 } 1865 1866 int cmd_stat(int argc, const char **argv) 1867 { 1868 const char * const stat_usage[] = { 1869 "perf stat [<options>] [<command>]", 1870 NULL 1871 }; 1872 int status = -EINVAL, run_idx; 1873 const char *mode; 1874 FILE *output = stderr; 1875 unsigned int interval, timeout; 1876 const char * const stat_subcommands[] = { "record", "report" }; 1877 1878 setlocale(LC_ALL, ""); 1879 1880 evsel_list = evlist__new(); 1881 if (evsel_list == NULL) 1882 return -ENOMEM; 1883 1884 parse_events__shrink_config_terms(); 1885 1886 /* String-parsing callback-based options would segfault when negated */ 1887 set_option_flag(stat_options, 'e', "event", PARSE_OPT_NONEG); 1888 set_option_flag(stat_options, 'M', "metrics", PARSE_OPT_NONEG); 1889 set_option_flag(stat_options, 'G', "cgroup", PARSE_OPT_NONEG); 1890 1891 argc = parse_options_subcommand(argc, argv, stat_options, stat_subcommands, 1892 (const char **) stat_usage, 1893 PARSE_OPT_STOP_AT_NON_OPTION); 1894 perf_stat__collect_metric_expr(evsel_list); 1895 perf_stat__init_shadow_stats(); 1896 1897 if (stat_config.csv_sep) { 1898 stat_config.csv_output = true; 1899 if (!strcmp(stat_config.csv_sep, "\\t")) 1900 stat_config.csv_sep = "\t"; 1901 } else 1902 stat_config.csv_sep = DEFAULT_SEPARATOR; 1903 1904 if (argc && !strncmp(argv[0], "rec", 3)) { 1905 argc = __cmd_record(argc, argv); 1906 if (argc < 0) 1907 return -1; 1908 } else if (argc && !strncmp(argv[0], "rep", 3)) 1909 return __cmd_report(argc, argv); 1910 1911 interval = stat_config.interval; 1912 timeout = stat_config.timeout; 1913 1914 /* 1915 * For record command the -o is already taken care of. 1916 */ 1917 if (!STAT_RECORD && output_name && strcmp(output_name, "-")) 1918 output = NULL; 1919 1920 if (output_name && output_fd) { 1921 fprintf(stderr, "cannot use both --output and --log-fd\n"); 1922 parse_options_usage(stat_usage, stat_options, "o", 1); 1923 parse_options_usage(NULL, stat_options, "log-fd", 0); 1924 goto out; 1925 } 1926 1927 if (stat_config.metric_only && stat_config.aggr_mode == AGGR_THREAD) { 1928 fprintf(stderr, "--metric-only is not supported with --per-thread\n"); 1929 goto out; 1930 } 1931 1932 if (stat_config.metric_only && stat_config.run_count > 1) { 1933 fprintf(stderr, "--metric-only is not supported with -r\n"); 1934 goto out; 1935 } 1936 1937 if (stat_config.walltime_run_table && stat_config.run_count <= 1) { 1938 fprintf(stderr, "--table is only supported with -r\n"); 1939 parse_options_usage(stat_usage, stat_options, "r", 1); 1940 parse_options_usage(NULL, stat_options, "table", 0); 1941 goto out; 1942 } 1943 1944 if (output_fd < 0) { 1945 fprintf(stderr, "argument to --log-fd must be a > 0\n"); 1946 parse_options_usage(stat_usage, stat_options, "log-fd", 0); 1947 goto out; 1948 } 1949 1950 if (!output) { 1951 struct timespec tm; 1952 mode = append_file ? "a" : "w"; 1953 1954 output = fopen(output_name, mode); 1955 if (!output) { 1956 perror("failed to create output file"); 1957 return -1; 1958 } 1959 clock_gettime(CLOCK_REALTIME, &tm); 1960 fprintf(output, "# started on %s\n", ctime(&tm.tv_sec)); 1961 } else if (output_fd > 0) { 1962 mode = append_file ? "a" : "w"; 1963 output = fdopen(output_fd, mode); 1964 if (!output) { 1965 perror("Failed opening logfd"); 1966 return -errno; 1967 } 1968 } 1969 1970 stat_config.output = output; 1971 1972 /* 1973 * let the spreadsheet do the pretty-printing 1974 */ 1975 if (stat_config.csv_output) { 1976 /* User explicitly passed -B? */ 1977 if (big_num_opt == 1) { 1978 fprintf(stderr, "-B option not supported with -x\n"); 1979 parse_options_usage(stat_usage, stat_options, "B", 1); 1980 parse_options_usage(NULL, stat_options, "x", 1); 1981 goto out; 1982 } else /* Nope, so disable big number formatting */ 1983 stat_config.big_num = false; 1984 } else if (big_num_opt == 0) /* User passed --no-big-num */ 1985 stat_config.big_num = false; 1986 1987 setup_system_wide(argc); 1988 1989 /* 1990 * Display user/system times only for single 1991 * run and when there's specified tracee. 1992 */ 1993 if ((stat_config.run_count == 1) && target__none(&target)) 1994 stat_config.ru_display = true; 1995 1996 if (stat_config.run_count < 0) { 1997 pr_err("Run count must be a positive number\n"); 1998 parse_options_usage(stat_usage, stat_options, "r", 1); 1999 goto out; 2000 } else if (stat_config.run_count == 0) { 2001 forever = true; 2002 stat_config.run_count = 1; 2003 } 2004 2005 if (stat_config.walltime_run_table) { 2006 stat_config.walltime_run = zalloc(stat_config.run_count * sizeof(stat_config.walltime_run[0])); 2007 if (!stat_config.walltime_run) { 2008 pr_err("failed to setup -r option"); 2009 goto out; 2010 } 2011 } 2012 2013 if ((stat_config.aggr_mode == AGGR_THREAD) && 2014 !target__has_task(&target)) { 2015 if (!target.system_wide || target.cpu_list) { 2016 fprintf(stderr, "The --per-thread option is only " 2017 "available when monitoring via -p -t -a " 2018 "options or only --per-thread.\n"); 2019 parse_options_usage(NULL, stat_options, "p", 1); 2020 parse_options_usage(NULL, stat_options, "t", 1); 2021 goto out; 2022 } 2023 } 2024 2025 /* 2026 * no_aggr, cgroup are for system-wide only 2027 * --per-thread is aggregated per thread, we dont mix it with cpu mode 2028 */ 2029 if (((stat_config.aggr_mode != AGGR_GLOBAL && 2030 stat_config.aggr_mode != AGGR_THREAD) || nr_cgroups) && 2031 !target__has_cpu(&target)) { 2032 fprintf(stderr, "both cgroup and no-aggregation " 2033 "modes only available in system-wide mode\n"); 2034 2035 parse_options_usage(stat_usage, stat_options, "G", 1); 2036 parse_options_usage(NULL, stat_options, "A", 1); 2037 parse_options_usage(NULL, stat_options, "a", 1); 2038 goto out; 2039 } 2040 2041 if (add_default_attributes()) 2042 goto out; 2043 2044 target__validate(&target); 2045 2046 if ((stat_config.aggr_mode == AGGR_THREAD) && (target.system_wide)) 2047 target.per_thread = true; 2048 2049 if (perf_evlist__create_maps(evsel_list, &target) < 0) { 2050 if (target__has_task(&target)) { 2051 pr_err("Problems finding threads of monitor\n"); 2052 parse_options_usage(stat_usage, stat_options, "p", 1); 2053 parse_options_usage(NULL, stat_options, "t", 1); 2054 } else if (target__has_cpu(&target)) { 2055 perror("failed to parse CPUs map"); 2056 parse_options_usage(stat_usage, stat_options, "C", 1); 2057 parse_options_usage(NULL, stat_options, "a", 1); 2058 } 2059 goto out; 2060 } 2061 2062 /* 2063 * Initialize thread_map with comm names, 2064 * so we could print it out on output. 2065 */ 2066 if (stat_config.aggr_mode == AGGR_THREAD) { 2067 thread_map__read_comms(evsel_list->core.threads); 2068 if (target.system_wide) { 2069 if (runtime_stat_new(&stat_config, 2070 perf_thread_map__nr(evsel_list->core.threads))) { 2071 goto out; 2072 } 2073 } 2074 } 2075 2076 if (stat_config.aggr_mode == AGGR_NODE) 2077 cpu__setup_cpunode_map(); 2078 2079 if (stat_config.times && interval) 2080 interval_count = true; 2081 else if (stat_config.times && !interval) { 2082 pr_err("interval-count option should be used together with " 2083 "interval-print.\n"); 2084 parse_options_usage(stat_usage, stat_options, "interval-count", 0); 2085 parse_options_usage(stat_usage, stat_options, "I", 1); 2086 goto out; 2087 } 2088 2089 if (timeout && timeout < 100) { 2090 if (timeout < 10) { 2091 pr_err("timeout must be >= 10ms.\n"); 2092 parse_options_usage(stat_usage, stat_options, "timeout", 0); 2093 goto out; 2094 } else 2095 pr_warning("timeout < 100ms. " 2096 "The overhead percentage could be high in some cases. " 2097 "Please proceed with caution.\n"); 2098 } 2099 if (timeout && interval) { 2100 pr_err("timeout option is not supported with interval-print.\n"); 2101 parse_options_usage(stat_usage, stat_options, "timeout", 0); 2102 parse_options_usage(stat_usage, stat_options, "I", 1); 2103 goto out; 2104 } 2105 2106 if (perf_evlist__alloc_stats(evsel_list, interval)) 2107 goto out; 2108 2109 if (perf_stat_init_aggr_mode()) 2110 goto out; 2111 2112 /* 2113 * Set sample_type to PERF_SAMPLE_IDENTIFIER, which should be harmless 2114 * while avoiding that older tools show confusing messages. 2115 * 2116 * However for pipe sessions we need to keep it zero, 2117 * because script's perf_evsel__check_attr is triggered 2118 * by attr->sample_type != 0, and we can't run it on 2119 * stat sessions. 2120 */ 2121 stat_config.identifier = !(STAT_RECORD && perf_stat.data.is_pipe); 2122 2123 /* 2124 * We dont want to block the signals - that would cause 2125 * child tasks to inherit that and Ctrl-C would not work. 2126 * What we want is for Ctrl-C to work in the exec()-ed 2127 * task, but being ignored by perf stat itself: 2128 */ 2129 atexit(sig_atexit); 2130 if (!forever) 2131 signal(SIGINT, skip_signal); 2132 signal(SIGCHLD, skip_signal); 2133 signal(SIGALRM, skip_signal); 2134 signal(SIGABRT, skip_signal); 2135 2136 status = 0; 2137 for (run_idx = 0; forever || run_idx < stat_config.run_count; run_idx++) { 2138 if (stat_config.run_count != 1 && verbose > 0) 2139 fprintf(output, "[ perf stat: executing run #%d ... ]\n", 2140 run_idx + 1); 2141 2142 if (run_idx != 0) 2143 perf_evlist__reset_prev_raw_counts(evsel_list); 2144 2145 status = run_perf_stat(argc, argv, run_idx); 2146 if (forever && status != -1 && !interval) { 2147 print_counters(NULL, argc, argv); 2148 perf_stat__reset_stats(); 2149 } 2150 } 2151 2152 if (!forever && status != -1 && !interval) 2153 print_counters(NULL, argc, argv); 2154 2155 if (STAT_RECORD) { 2156 /* 2157 * We synthesize the kernel mmap record just so that older tools 2158 * don't emit warnings about not being able to resolve symbols 2159 * due to /proc/sys/kernel/kptr_restrict settings and instear provide 2160 * a saner message about no samples being in the perf.data file. 2161 * 2162 * This also serves to suppress a warning about f_header.data.size == 0 2163 * in header.c at the moment 'perf stat record' gets introduced, which 2164 * is not really needed once we start adding the stat specific PERF_RECORD_ 2165 * records, but the need to suppress the kptr_restrict messages in older 2166 * tools remain -acme 2167 */ 2168 int fd = perf_data__fd(&perf_stat.data); 2169 int err = perf_event__synthesize_kernel_mmap((void *)&perf_stat, 2170 process_synthesized_event, 2171 &perf_stat.session->machines.host); 2172 if (err) { 2173 pr_warning("Couldn't synthesize the kernel mmap record, harmless, " 2174 "older tools may produce warnings about this file\n."); 2175 } 2176 2177 if (!interval) { 2178 if (WRITE_STAT_ROUND_EVENT(walltime_nsecs_stats.max, FINAL)) 2179 pr_err("failed to write stat round event\n"); 2180 } 2181 2182 if (!perf_stat.data.is_pipe) { 2183 perf_stat.session->header.data_size += perf_stat.bytes_written; 2184 perf_session__write_header(perf_stat.session, evsel_list, fd, true); 2185 } 2186 2187 evlist__close(evsel_list); 2188 perf_session__delete(perf_stat.session); 2189 } 2190 2191 perf_stat__exit_aggr_mode(); 2192 perf_evlist__free_stats(evsel_list); 2193 out: 2194 zfree(&stat_config.walltime_run); 2195 2196 if (smi_cost && smi_reset) 2197 sysfs__write_int(FREEZE_ON_SMI_PATH, 0); 2198 2199 evlist__delete(evsel_list); 2200 2201 runtime_stat_delete(&stat_config); 2202 2203 return status; 2204 } 2205