1 // SPDX-License-Identifier: GPL-2.0-only
5 * Builtin stat command: Give a precise performance counters summary
6 * overview about any workload, CPU or specific PID.
10 $ perf stat ./hackbench 10
14 Performance counter stats for './hackbench 10':
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
28 0.154822978 seconds time elapsed
31 * Copyright (C) 2008-2011, Red Hat Inc, Ingo Molnar <mingo@redhat.com>
33 * Improvements and fixes by:
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>
45 #include "util/cgroup.h"
46 #include <subcmd/parse-options.h>
47 #include "util/parse-events.h"
49 #include "util/event.h"
50 #include "util/evlist.h"
51 #include "util/evsel.h"
52 #include "util/debug.h"
53 #include "util/color.h"
54 #include "util/stat.h"
55 #include "util/header.h"
56 #include "util/cpumap.h"
57 #include "util/thread_map.h"
58 #include "util/counts.h"
59 #include "util/topdown.h"
60 #include "util/session.h"
61 #include "util/tool.h"
62 #include "util/string2.h"
63 #include "util/metricgroup.h"
64 #include "util/synthetic-events.h"
65 #include "util/target.h"
66 #include "util/time-utils.h"
68 #include "util/affinity.h"
72 #include <linux/time64.h>
73 #include <linux/zalloc.h>
74 #include <api/fs/fs.h>
78 #include <sys/prctl.h>
82 #include <sys/types.h>
87 #include <sys/resource.h>
88 #include <linux/err.h>
90 #include <linux/ctype.h>
91 #include <perf/evlist.h>
93 #define DEFAULT_SEPARATOR " "
94 #define FREEZE_ON_SMI_PATH "devices/cpu/freeze_on_smi"
96 static void print_counters(struct timespec *ts, int argc, const char **argv);
98 /* Default events used for perf stat -T */
99 static const char *transaction_attrs = {
111 /* More limited version when the CPU does not have all events. */
112 static const char * transaction_limited_attrs = {
122 static const char * topdown_attrs[] = {
123 "topdown-total-slots",
124 "topdown-slots-retired",
125 "topdown-recovery-bubbles",
126 "topdown-fetch-bubbles",
127 "topdown-slots-issued",
131 static const char *topdown_metric_attrs[] = {
140 static const char *smi_cost_attrs = {
148 static struct evlist *evsel_list;
150 static struct target target = {
154 #define METRIC_ONLY_LEN 20
156 static volatile pid_t child_pid = -1;
157 static int detailed_run = 0;
158 static bool transaction_run;
159 static bool topdown_run = false;
160 static bool smi_cost = false;
161 static bool smi_reset = false;
162 static int big_num_opt = -1;
163 static bool group = false;
164 static const char *pre_cmd = NULL;
165 static const char *post_cmd = NULL;
166 static bool sync_run = false;
167 static bool forever = false;
168 static bool force_metric_only = false;
169 static struct timespec ref_time;
170 static bool append_file;
171 static bool interval_count;
172 static const char *output_name;
173 static int output_fd;
177 struct perf_data data;
178 struct perf_session *session;
180 struct perf_tool tool;
182 struct perf_cpu_map *cpus;
183 struct perf_thread_map *threads;
184 enum aggr_mode aggr_mode;
187 static struct perf_stat perf_stat;
188 #define STAT_RECORD perf_stat.record
190 static volatile int done = 0;
192 static struct perf_stat_config stat_config = {
193 .aggr_mode = AGGR_GLOBAL,
195 .unit_width = 4, /* strlen("unit") */
197 .metric_only_len = METRIC_ONLY_LEN,
198 .walltime_nsecs_stats = &walltime_nsecs_stats,
204 static bool cpus_map_matched(struct evsel *a, struct evsel *b)
206 if (!a->core.cpus && !b->core.cpus)
209 if (!a->core.cpus || !b->core.cpus)
212 if (a->core.cpus->nr != b->core.cpus->nr)
215 for (int i = 0; i < a->core.cpus->nr; i++) {
216 if (a->core.cpus->map[i] != b->core.cpus->map[i])
223 static void evlist__check_cpu_maps(struct evlist *evlist)
225 struct evsel *evsel, *pos, *leader;
228 evlist__for_each_entry(evlist, evsel) {
229 leader = evsel->leader;
231 /* Check that leader matches cpus with each member. */
234 if (cpus_map_matched(leader, evsel))
237 /* If there's mismatch disable the group and warn user. */
238 WARN_ONCE(1, "WARNING: grouped events cpus do not match, disabling group:\n");
239 evsel__group_desc(leader, buf, sizeof(buf));
240 pr_warning(" %s\n", buf);
243 cpu_map__snprint(leader->core.cpus, buf, sizeof(buf));
244 pr_warning(" %s: %s\n", leader->name, buf);
245 cpu_map__snprint(evsel->core.cpus, buf, sizeof(buf));
246 pr_warning(" %s: %s\n", evsel->name, buf);
249 for_each_group_evsel(pos, leader) {
251 pos->core.nr_members = 0;
253 evsel->leader->core.nr_members = 0;
257 static inline void diff_timespec(struct timespec *r, struct timespec *a,
260 r->tv_sec = a->tv_sec - b->tv_sec;
261 if (a->tv_nsec < b->tv_nsec) {
262 r->tv_nsec = a->tv_nsec + NSEC_PER_SEC - b->tv_nsec;
265 r->tv_nsec = a->tv_nsec - b->tv_nsec ;
269 static void perf_stat__reset_stats(void)
273 evlist__reset_stats(evsel_list);
274 perf_stat__reset_shadow_stats();
276 for (i = 0; i < stat_config.stats_num; i++)
277 perf_stat__reset_shadow_per_stat(&stat_config.stats[i]);
280 static int process_synthesized_event(struct perf_tool *tool __maybe_unused,
281 union perf_event *event,
282 struct perf_sample *sample __maybe_unused,
283 struct machine *machine __maybe_unused)
285 if (perf_data__write(&perf_stat.data, event, event->header.size) < 0) {
286 pr_err("failed to write perf data, error: %m\n");
290 perf_stat.bytes_written += event->header.size;
294 static int write_stat_round_event(u64 tm, u64 type)
296 return perf_event__synthesize_stat_round(NULL, tm, type,
297 process_synthesized_event,
301 #define WRITE_STAT_ROUND_EVENT(time, interval) \
302 write_stat_round_event(time, PERF_STAT_ROUND_TYPE__ ## interval)
304 #define SID(e, x, y) xyarray__entry(e->core.sample_id, x, y)
306 static int evsel__write_stat_event(struct evsel *counter, u32 cpu, u32 thread,
307 struct perf_counts_values *count)
309 struct perf_sample_id *sid = SID(counter, cpu, thread);
311 return perf_event__synthesize_stat(NULL, cpu, thread, sid->id, count,
312 process_synthesized_event, NULL);
315 static int read_single_counter(struct evsel *counter, int cpu,
316 int thread, struct timespec *rs)
318 if (counter->tool_event == PERF_TOOL_DURATION_TIME) {
319 u64 val = rs->tv_nsec + rs->tv_sec*1000000000ULL;
320 struct perf_counts_values *count =
321 perf_counts(counter->counts, cpu, thread);
322 count->ena = count->run = val;
326 return evsel__read_counter(counter, cpu, thread);
330 * Read out the results of a single counter:
331 * do not aggregate counts across CPUs in system-wide mode
333 static int read_counter_cpu(struct evsel *counter, struct timespec *rs, int cpu)
335 int nthreads = perf_thread_map__nr(evsel_list->core.threads);
338 if (!counter->supported)
341 if (counter->core.system_wide)
344 for (thread = 0; thread < nthreads; thread++) {
345 struct perf_counts_values *count;
347 count = perf_counts(counter->counts, cpu, thread);
350 * The leader's group read loads data into its group members
351 * (via evsel__read_counter()) and sets their count->loaded.
353 if (!perf_counts__is_loaded(counter->counts, cpu, thread) &&
354 read_single_counter(counter, cpu, thread, rs)) {
355 counter->counts->scaled = -1;
356 perf_counts(counter->counts, cpu, thread)->ena = 0;
357 perf_counts(counter->counts, cpu, thread)->run = 0;
361 perf_counts__set_loaded(counter->counts, cpu, thread, false);
364 if (evsel__write_stat_event(counter, cpu, thread, count)) {
365 pr_err("failed to write stat event\n");
371 fprintf(stat_config.output,
372 "%s: %d: %" PRIu64 " %" PRIu64 " %" PRIu64 "\n",
373 evsel__name(counter),
375 count->val, count->ena, count->run);
382 static int read_affinity_counters(struct timespec *rs)
384 struct evsel *counter;
385 struct affinity affinity;
388 if (affinity__setup(&affinity) < 0)
391 ncpus = perf_cpu_map__nr(evsel_list->core.all_cpus);
392 if (!target__has_cpu(&target) || target__has_per_thread(&target))
394 evlist__for_each_cpu(evsel_list, i, cpu) {
397 affinity__set(&affinity, cpu);
399 evlist__for_each_entry(evsel_list, counter) {
400 if (evsel__cpu_iter_skip(counter, cpu))
403 counter->err = read_counter_cpu(counter, rs,
404 counter->cpu_iter - 1);
408 affinity__cleanup(&affinity);
412 static void read_counters(struct timespec *rs)
414 struct evsel *counter;
416 if (!stat_config.stop_read_counter && (read_affinity_counters(rs) < 0))
419 evlist__for_each_entry(evsel_list, counter) {
421 pr_debug("failed to read counter %s\n", counter->name);
422 if (counter->err == 0 && perf_stat_process_counter(&stat_config, counter))
423 pr_warning("failed to process counter %s\n", counter->name);
428 static int runtime_stat_new(struct perf_stat_config *config, int nthreads)
432 config->stats = calloc(nthreads, sizeof(struct runtime_stat));
436 config->stats_num = nthreads;
438 for (i = 0; i < nthreads; i++)
439 runtime_stat__init(&config->stats[i]);
444 static void runtime_stat_delete(struct perf_stat_config *config)
451 for (i = 0; i < config->stats_num; i++)
452 runtime_stat__exit(&config->stats[i]);
454 zfree(&config->stats);
457 static void runtime_stat_reset(struct perf_stat_config *config)
464 for (i = 0; i < config->stats_num; i++)
465 perf_stat__reset_shadow_per_stat(&config->stats[i]);
468 static void process_interval(void)
470 struct timespec ts, rs;
472 clock_gettime(CLOCK_MONOTONIC, &ts);
473 diff_timespec(&rs, &ts, &ref_time);
475 perf_stat__reset_shadow_per_stat(&rt_stat);
476 runtime_stat_reset(&stat_config);
480 if (WRITE_STAT_ROUND_EVENT(rs.tv_sec * NSEC_PER_SEC + rs.tv_nsec, INTERVAL))
481 pr_err("failed to write stat round event\n");
484 init_stats(&walltime_nsecs_stats);
485 update_stats(&walltime_nsecs_stats, stat_config.interval * 1000000ULL);
486 print_counters(&rs, 0, NULL);
489 static bool handle_interval(unsigned int interval, int *times)
493 if (interval_count && !(--(*times)))
499 static void enable_counters(void)
501 if (stat_config.initial_delay < 0) {
502 pr_info(EVLIST_DISABLED_MSG);
506 if (stat_config.initial_delay > 0) {
507 pr_info(EVLIST_DISABLED_MSG);
508 usleep(stat_config.initial_delay * USEC_PER_MSEC);
512 * We need to enable counters only if:
513 * - we don't have tracee (attaching to task or cpu)
514 * - we have initial delay configured
516 if (!target__none(&target) || stat_config.initial_delay) {
517 evlist__enable(evsel_list);
518 if (stat_config.initial_delay > 0)
519 pr_info(EVLIST_ENABLED_MSG);
523 static void disable_counters(void)
526 * If we don't have tracee (attaching to task or cpu), counters may
527 * still be running. To get accurate group ratios, we must stop groups
528 * from counting before reading their constituent counters.
530 if (!target__none(&target))
531 evlist__disable(evsel_list);
534 static volatile int workload_exec_errno;
537 * evlist__prepare_workload will send a SIGUSR1
538 * if the fork fails, since we asked by setting its
539 * want_signal to true.
541 static void workload_exec_failed_signal(int signo __maybe_unused, siginfo_t *info,
542 void *ucontext __maybe_unused)
544 workload_exec_errno = info->si_value.sival_int;
547 static bool evsel__should_store_id(struct evsel *counter)
549 return STAT_RECORD || counter->core.attr.read_format & PERF_FORMAT_ID;
552 static bool is_target_alive(struct target *_target,
553 struct perf_thread_map *threads)
558 if (!target__has_task(_target))
561 for (i = 0; i < threads->nr; i++) {
564 scnprintf(path, PATH_MAX, "%s/%d", procfs__mountpoint(),
565 threads->map[i].pid);
567 if (!stat(path, &st))
574 static void process_evlist(struct evlist *evlist, unsigned int interval)
576 enum evlist_ctl_cmd cmd = EVLIST_CTL_CMD_UNSUPPORTED;
578 if (evlist__ctlfd_process(evlist, &cmd) > 0) {
580 case EVLIST_CTL_CMD_ENABLE:
581 pr_info(EVLIST_ENABLED_MSG);
585 case EVLIST_CTL_CMD_DISABLE:
588 pr_info(EVLIST_DISABLED_MSG);
590 case EVLIST_CTL_CMD_SNAPSHOT:
591 case EVLIST_CTL_CMD_ACK:
592 case EVLIST_CTL_CMD_UNSUPPORTED:
599 static void compute_tts(struct timespec *time_start, struct timespec *time_stop,
602 int tts = *time_to_sleep;
603 struct timespec time_diff;
605 diff_timespec(&time_diff, time_stop, time_start);
607 tts -= time_diff.tv_sec * MSEC_PER_SEC +
608 time_diff.tv_nsec / NSEC_PER_MSEC;
613 *time_to_sleep = tts;
616 static int dispatch_events(bool forks, int timeout, int interval, int *times)
618 int child_exited = 0, status = 0;
619 int time_to_sleep, sleep_time;
620 struct timespec time_start, time_stop;
623 sleep_time = interval;
625 sleep_time = timeout;
629 time_to_sleep = sleep_time;
633 child_exited = waitpid(child_pid, &status, WNOHANG);
635 child_exited = !is_target_alive(&target, evsel_list->core.threads) ? 1 : 0;
640 clock_gettime(CLOCK_MONOTONIC, &time_start);
641 if (!(evlist__poll(evsel_list, time_to_sleep) > 0)) { /* poll timeout or EINTR */
642 if (timeout || handle_interval(interval, times))
644 time_to_sleep = sleep_time;
645 } else { /* fd revent */
646 process_evlist(evsel_list, interval);
647 clock_gettime(CLOCK_MONOTONIC, &time_stop);
648 compute_tts(&time_start, &time_stop, &time_to_sleep);
655 enum counter_recovery {
661 static enum counter_recovery stat_handle_error(struct evsel *counter)
665 * PPC returns ENXIO for HW counters until 2.6.37
666 * (behavior changed with commit b0a873e).
668 if (errno == EINVAL || errno == ENOSYS ||
669 errno == ENOENT || errno == EOPNOTSUPP ||
672 ui__warning("%s event is not supported by the kernel.\n",
673 evsel__name(counter));
674 counter->supported = false;
676 * errored is a sticky flag that means one of the counter's
677 * cpu event had a problem and needs to be reexamined.
679 counter->errored = true;
681 if ((counter->leader != counter) ||
682 !(counter->leader->core.nr_members > 1))
684 } else if (evsel__fallback(counter, errno, msg, sizeof(msg))) {
686 ui__warning("%s\n", msg);
687 return COUNTER_RETRY;
688 } else if (target__has_per_thread(&target) &&
689 evsel_list->core.threads &&
690 evsel_list->core.threads->err_thread != -1) {
692 * For global --per-thread case, skip current
695 if (!thread_map__remove(evsel_list->core.threads,
696 evsel_list->core.threads->err_thread)) {
697 evsel_list->core.threads->err_thread = -1;
698 return COUNTER_RETRY;
702 evsel__open_strerror(counter, &target, errno, msg, sizeof(msg));
703 ui__error("%s\n", msg);
706 kill(child_pid, SIGTERM);
707 return COUNTER_FATAL;
710 static int __run_perf_stat(int argc, const char **argv, int run_idx)
712 int interval = stat_config.interval;
713 int times = stat_config.times;
714 int timeout = stat_config.timeout;
716 unsigned long long t0, t1;
717 struct evsel *counter;
720 const bool forks = (argc > 0);
721 bool is_pipe = STAT_RECORD ? perf_stat.data.is_pipe : false;
722 struct affinity affinity;
724 bool second_pass = false;
727 if (evlist__prepare_workload(evsel_list, &target, argv, is_pipe, workload_exec_failed_signal) < 0) {
728 perror("failed to prepare workload");
731 child_pid = evsel_list->workload.pid;
735 evlist__set_leader(evsel_list);
737 if (affinity__setup(&affinity) < 0)
740 evlist__for_each_cpu (evsel_list, i, cpu) {
741 affinity__set(&affinity, cpu);
743 evlist__for_each_entry(evsel_list, counter) {
744 if (evsel__cpu_iter_skip(counter, cpu))
746 if (counter->reset_group || counter->errored)
749 if (create_perf_stat_counter(counter, &stat_config, &target,
750 counter->cpu_iter - 1) < 0) {
753 * Weak group failed. We cannot just undo this here
754 * because earlier CPUs might be in group mode, and the kernel
755 * doesn't support mixing group and non group reads. Defer
757 * Don't close here because we're in the wrong affinity.
759 if ((errno == EINVAL || errno == EBADF) &&
760 counter->leader != counter &&
761 counter->weak_group) {
762 evlist__reset_weak_group(evsel_list, counter, false);
763 assert(counter->reset_group);
768 switch (stat_handle_error(counter)) {
780 counter->supported = true;
786 * Now redo all the weak group after closing them,
787 * and also close errored counters.
790 evlist__for_each_cpu(evsel_list, i, cpu) {
791 affinity__set(&affinity, cpu);
792 /* First close errored or weak retry */
793 evlist__for_each_entry(evsel_list, counter) {
794 if (!counter->reset_group && !counter->errored)
796 if (evsel__cpu_iter_skip_no_inc(counter, cpu))
798 perf_evsel__close_cpu(&counter->core, counter->cpu_iter);
800 /* Now reopen weak */
801 evlist__for_each_entry(evsel_list, counter) {
802 if (!counter->reset_group && !counter->errored)
804 if (evsel__cpu_iter_skip(counter, cpu))
806 if (!counter->reset_group)
809 pr_debug2("reopening weak %s\n", evsel__name(counter));
810 if (create_perf_stat_counter(counter, &stat_config, &target,
811 counter->cpu_iter - 1) < 0) {
813 switch (stat_handle_error(counter)) {
817 goto try_again_reset;
824 counter->supported = true;
828 affinity__cleanup(&affinity);
830 evlist__for_each_entry(evsel_list, counter) {
831 if (!counter->supported) {
832 perf_evsel__free_fd(&counter->core);
836 l = strlen(counter->unit);
837 if (l > stat_config.unit_width)
838 stat_config.unit_width = l;
840 if (evsel__should_store_id(counter) &&
841 evsel__store_ids(counter, evsel_list))
845 if (evlist__apply_filters(evsel_list, &counter)) {
846 pr_err("failed to set filter \"%s\" on event %s with %d (%s)\n",
847 counter->filter, evsel__name(counter), errno,
848 str_error_r(errno, msg, sizeof(msg)));
853 int err, fd = perf_data__fd(&perf_stat.data);
856 err = perf_header__write_pipe(perf_data__fd(&perf_stat.data));
858 err = perf_session__write_header(perf_stat.session, evsel_list,
865 err = perf_event__synthesize_stat_events(&stat_config, NULL, evsel_list,
866 process_synthesized_event, is_pipe);
872 * Enable counters and exec the command:
875 clock_gettime(CLOCK_MONOTONIC, &ref_time);
878 evlist__start_workload(evsel_list);
881 if (interval || timeout || evlist__ctlfd_initialized(evsel_list))
882 status = dispatch_events(forks, timeout, interval, ×);
883 if (child_pid != -1) {
885 kill(child_pid, SIGTERM);
886 wait4(child_pid, &status, 0, &stat_config.ru_data);
889 if (workload_exec_errno) {
890 const char *emsg = str_error_r(workload_exec_errno, msg, sizeof(msg));
891 pr_err("Workload failed: %s\n", emsg);
895 if (WIFSIGNALED(status))
896 psignal(WTERMSIG(status), argv[0]);
899 status = dispatch_events(forks, timeout, interval, ×);
906 if (stat_config.walltime_run_table)
907 stat_config.walltime_run[run_idx] = t1 - t0;
909 if (interval && stat_config.summary) {
910 stat_config.interval = 0;
911 stat_config.stop_read_counter = true;
912 init_stats(&walltime_nsecs_stats);
913 update_stats(&walltime_nsecs_stats, t1 - t0);
915 if (stat_config.aggr_mode == AGGR_GLOBAL)
916 evlist__save_aggr_prev_raw_counts(evsel_list);
918 evlist__copy_prev_raw_counts(evsel_list);
919 evlist__reset_prev_raw_counts(evsel_list);
920 runtime_stat_reset(&stat_config);
921 perf_stat__reset_shadow_per_stat(&rt_stat);
923 update_stats(&walltime_nsecs_stats, t1 - t0);
926 * Closing a group leader splits the group, and as we only disable
927 * group leaders, results in remaining events becoming enabled. To
928 * avoid arbitrary skew, we must read all counters before closing any
931 read_counters(&(struct timespec) { .tv_nsec = t1-t0 });
934 * We need to keep evsel_list alive, because it's processed
935 * later the evsel_list will be closed after.
938 evlist__close(evsel_list);
940 return WEXITSTATUS(status);
943 static int run_perf_stat(int argc, const char **argv, int run_idx)
948 ret = system(pre_cmd);
956 ret = __run_perf_stat(argc, argv, run_idx);
961 ret = system(post_cmd);
969 static void print_counters(struct timespec *ts, int argc, const char **argv)
971 /* Do not print anything if we record to the pipe. */
972 if (STAT_RECORD && perf_stat.data.is_pipe)
974 if (stat_config.quiet)
977 evlist__print_counters(evsel_list, &stat_config, &target, ts, argc, argv);
980 static volatile int signr = -1;
982 static void skip_signal(int signo)
984 if ((child_pid == -1) || stat_config.interval)
989 * render child_pid harmless
990 * won't send SIGTERM to a random
991 * process in case of race condition
992 * and fast PID recycling
997 static void sig_atexit(void)
1002 * avoid race condition with SIGCHLD handler
1003 * in skip_signal() which is modifying child_pid
1004 * goal is to avoid send SIGTERM to a random
1008 sigaddset(&set, SIGCHLD);
1009 sigprocmask(SIG_BLOCK, &set, &oset);
1011 if (child_pid != -1)
1012 kill(child_pid, SIGTERM);
1014 sigprocmask(SIG_SETMASK, &oset, NULL);
1019 signal(signr, SIG_DFL);
1020 kill(getpid(), signr);
1023 void perf_stat__set_big_num(int set)
1025 stat_config.big_num = (set != 0);
1028 static int stat__set_big_num(const struct option *opt __maybe_unused,
1029 const char *s __maybe_unused, int unset)
1031 big_num_opt = unset ? 0 : 1;
1032 perf_stat__set_big_num(!unset);
1036 static int enable_metric_only(const struct option *opt __maybe_unused,
1037 const char *s __maybe_unused, int unset)
1039 force_metric_only = true;
1040 stat_config.metric_only = !unset;
1044 static int parse_metric_groups(const struct option *opt,
1046 int unset __maybe_unused)
1048 return metricgroup__parse_groups(opt, str,
1049 stat_config.metric_no_group,
1050 stat_config.metric_no_merge,
1051 &stat_config.metric_events);
1054 static int parse_control_option(const struct option *opt,
1056 int unset __maybe_unused)
1058 struct perf_stat_config *config = opt->value;
1060 return evlist__parse_control(str, &config->ctl_fd, &config->ctl_fd_ack, &config->ctl_fd_close);
1063 static int parse_stat_cgroups(const struct option *opt,
1064 const char *str, int unset)
1066 if (stat_config.cgroup_list) {
1067 pr_err("--cgroup and --for-each-cgroup cannot be used together\n");
1071 return parse_cgroups(opt, str, unset);
1074 static struct option stat_options[] = {
1075 OPT_BOOLEAN('T', "transaction", &transaction_run,
1076 "hardware transaction statistics"),
1077 OPT_CALLBACK('e', "event", &evsel_list, "event",
1078 "event selector. use 'perf list' to list available events",
1079 parse_events_option),
1080 OPT_CALLBACK(0, "filter", &evsel_list, "filter",
1081 "event filter", parse_filter),
1082 OPT_BOOLEAN('i', "no-inherit", &stat_config.no_inherit,
1083 "child tasks do not inherit counters"),
1084 OPT_STRING('p', "pid", &target.pid, "pid",
1085 "stat events on existing process id"),
1086 OPT_STRING('t', "tid", &target.tid, "tid",
1087 "stat events on existing thread id"),
1088 OPT_BOOLEAN('a', "all-cpus", &target.system_wide,
1089 "system-wide collection from all CPUs"),
1090 OPT_BOOLEAN('g', "group", &group,
1091 "put the counters into a counter group"),
1092 OPT_BOOLEAN(0, "scale", &stat_config.scale,
1093 "Use --no-scale to disable counter scaling for multiplexing"),
1094 OPT_INCR('v', "verbose", &verbose,
1095 "be more verbose (show counter open errors, etc)"),
1096 OPT_INTEGER('r', "repeat", &stat_config.run_count,
1097 "repeat command and print average + stddev (max: 100, forever: 0)"),
1098 OPT_BOOLEAN(0, "table", &stat_config.walltime_run_table,
1099 "display details about each run (only with -r option)"),
1100 OPT_BOOLEAN('n', "null", &stat_config.null_run,
1101 "null run - dont start any counters"),
1102 OPT_INCR('d', "detailed", &detailed_run,
1103 "detailed run - start a lot of events"),
1104 OPT_BOOLEAN('S', "sync", &sync_run,
1105 "call sync() before starting a run"),
1106 OPT_CALLBACK_NOOPT('B', "big-num", NULL, NULL,
1107 "print large numbers with thousands\' separators",
1109 OPT_STRING('C', "cpu", &target.cpu_list, "cpu",
1110 "list of cpus to monitor in system-wide"),
1111 OPT_SET_UINT('A', "no-aggr", &stat_config.aggr_mode,
1112 "disable CPU count aggregation", AGGR_NONE),
1113 OPT_BOOLEAN(0, "no-merge", &stat_config.no_merge, "Do not merge identical named events"),
1114 OPT_STRING('x', "field-separator", &stat_config.csv_sep, "separator",
1115 "print counts with custom separator"),
1116 OPT_CALLBACK('G', "cgroup", &evsel_list, "name",
1117 "monitor event in cgroup name only", parse_stat_cgroups),
1118 OPT_STRING(0, "for-each-cgroup", &stat_config.cgroup_list, "name",
1119 "expand events for each cgroup"),
1120 OPT_STRING('o', "output", &output_name, "file", "output file name"),
1121 OPT_BOOLEAN(0, "append", &append_file, "append to the output file"),
1122 OPT_INTEGER(0, "log-fd", &output_fd,
1123 "log output to fd, instead of stderr"),
1124 OPT_STRING(0, "pre", &pre_cmd, "command",
1125 "command to run prior to the measured command"),
1126 OPT_STRING(0, "post", &post_cmd, "command",
1127 "command to run after to the measured command"),
1128 OPT_UINTEGER('I', "interval-print", &stat_config.interval,
1129 "print counts at regular interval in ms "
1130 "(overhead is possible for values <= 100ms)"),
1131 OPT_INTEGER(0, "interval-count", &stat_config.times,
1132 "print counts for fixed number of times"),
1133 OPT_BOOLEAN(0, "interval-clear", &stat_config.interval_clear,
1134 "clear screen in between new interval"),
1135 OPT_UINTEGER(0, "timeout", &stat_config.timeout,
1136 "stop workload and print counts after a timeout period in ms (>= 10ms)"),
1137 OPT_SET_UINT(0, "per-socket", &stat_config.aggr_mode,
1138 "aggregate counts per processor socket", AGGR_SOCKET),
1139 OPT_SET_UINT(0, "per-die", &stat_config.aggr_mode,
1140 "aggregate counts per processor die", AGGR_DIE),
1141 OPT_SET_UINT(0, "per-core", &stat_config.aggr_mode,
1142 "aggregate counts per physical processor core", AGGR_CORE),
1143 OPT_SET_UINT(0, "per-thread", &stat_config.aggr_mode,
1144 "aggregate counts per thread", AGGR_THREAD),
1145 OPT_SET_UINT(0, "per-node", &stat_config.aggr_mode,
1146 "aggregate counts per numa node", AGGR_NODE),
1147 OPT_INTEGER('D', "delay", &stat_config.initial_delay,
1148 "ms to wait before starting measurement after program start (-1: start with events disabled)"),
1149 OPT_CALLBACK_NOOPT(0, "metric-only", &stat_config.metric_only, NULL,
1150 "Only print computed metrics. No raw values", enable_metric_only),
1151 OPT_BOOLEAN(0, "metric-no-group", &stat_config.metric_no_group,
1152 "don't group metric events, impacts multiplexing"),
1153 OPT_BOOLEAN(0, "metric-no-merge", &stat_config.metric_no_merge,
1154 "don't try to share events between metrics in a group"),
1155 OPT_BOOLEAN(0, "topdown", &topdown_run,
1156 "measure topdown level 1 statistics"),
1157 OPT_BOOLEAN(0, "smi-cost", &smi_cost,
1158 "measure SMI cost"),
1159 OPT_CALLBACK('M', "metrics", &evsel_list, "metric/metric group list",
1160 "monitor specified metrics or metric groups (separated by ,)",
1161 parse_metric_groups),
1162 OPT_BOOLEAN_FLAG(0, "all-kernel", &stat_config.all_kernel,
1163 "Configure all used events to run in kernel space.",
1164 PARSE_OPT_EXCLUSIVE),
1165 OPT_BOOLEAN_FLAG(0, "all-user", &stat_config.all_user,
1166 "Configure all used events to run in user space.",
1167 PARSE_OPT_EXCLUSIVE),
1168 OPT_BOOLEAN(0, "percore-show-thread", &stat_config.percore_show_thread,
1169 "Use with 'percore' event qualifier to show the event "
1170 "counts of one hardware thread by sum up total hardware "
1171 "threads of same physical core"),
1172 OPT_BOOLEAN(0, "summary", &stat_config.summary,
1173 "print summary for interval mode"),
1174 OPT_BOOLEAN(0, "quiet", &stat_config.quiet,
1175 "don't print output (useful with record)"),
1177 OPT_CALLBACK(0, "pfm-events", &evsel_list, "event",
1178 "libpfm4 event selector. use 'perf list' to list available events",
1179 parse_libpfm_events_option),
1181 OPT_CALLBACK(0, "control", &stat_config, "fd:ctl-fd[,ack-fd] or fifo:ctl-fifo[,ack-fifo]",
1182 "Listen on ctl-fd descriptor for command to control measurement ('enable': enable events, 'disable': disable events).\n"
1183 "\t\t\t Optionally send control command completion ('ack\\n') to ack-fd descriptor.\n"
1184 "\t\t\t Alternatively, ctl-fifo / ack-fifo will be opened and used as ctl-fd / ack-fd.",
1185 parse_control_option),
1189 static struct aggr_cpu_id perf_stat__get_socket(struct perf_stat_config *config __maybe_unused,
1190 struct perf_cpu_map *map, int cpu)
1192 return cpu_map__get_socket(map, cpu, NULL);
1195 static struct aggr_cpu_id perf_stat__get_die(struct perf_stat_config *config __maybe_unused,
1196 struct perf_cpu_map *map, int cpu)
1198 return cpu_map__get_die(map, cpu, NULL);
1201 static struct aggr_cpu_id perf_stat__get_core(struct perf_stat_config *config __maybe_unused,
1202 struct perf_cpu_map *map, int cpu)
1204 return cpu_map__get_core(map, cpu, NULL);
1207 static struct aggr_cpu_id perf_stat__get_node(struct perf_stat_config *config __maybe_unused,
1208 struct perf_cpu_map *map, int cpu)
1210 return cpu_map__get_node(map, cpu, NULL);
1213 static struct aggr_cpu_id perf_stat__get_aggr(struct perf_stat_config *config,
1214 aggr_get_id_t get_id, struct perf_cpu_map *map, int idx)
1217 struct aggr_cpu_id id = cpu_map__empty_aggr_cpu_id();
1222 cpu = map->map[idx];
1224 if (cpu_map__aggr_cpu_id_is_empty(config->cpus_aggr_map->map[cpu]))
1225 config->cpus_aggr_map->map[cpu] = get_id(config, map, idx);
1227 id = config->cpus_aggr_map->map[cpu];
1231 static struct aggr_cpu_id perf_stat__get_socket_cached(struct perf_stat_config *config,
1232 struct perf_cpu_map *map, int idx)
1234 return perf_stat__get_aggr(config, perf_stat__get_socket, map, idx);
1237 static struct aggr_cpu_id perf_stat__get_die_cached(struct perf_stat_config *config,
1238 struct perf_cpu_map *map, int idx)
1240 return perf_stat__get_aggr(config, perf_stat__get_die, map, idx);
1243 static struct aggr_cpu_id perf_stat__get_core_cached(struct perf_stat_config *config,
1244 struct perf_cpu_map *map, int idx)
1246 return perf_stat__get_aggr(config, perf_stat__get_core, map, idx);
1249 static struct aggr_cpu_id perf_stat__get_node_cached(struct perf_stat_config *config,
1250 struct perf_cpu_map *map, int idx)
1252 return perf_stat__get_aggr(config, perf_stat__get_node, map, idx);
1255 static bool term_percore_set(void)
1257 struct evsel *counter;
1259 evlist__for_each_entry(evsel_list, counter) {
1260 if (counter->percore)
1267 static int perf_stat_init_aggr_mode(void)
1271 switch (stat_config.aggr_mode) {
1273 if (cpu_map__build_socket_map(evsel_list->core.cpus, &stat_config.aggr_map)) {
1274 perror("cannot build socket map");
1277 stat_config.aggr_get_id = perf_stat__get_socket_cached;
1280 if (cpu_map__build_die_map(evsel_list->core.cpus, &stat_config.aggr_map)) {
1281 perror("cannot build die map");
1284 stat_config.aggr_get_id = perf_stat__get_die_cached;
1287 if (cpu_map__build_core_map(evsel_list->core.cpus, &stat_config.aggr_map)) {
1288 perror("cannot build core map");
1291 stat_config.aggr_get_id = perf_stat__get_core_cached;
1294 if (cpu_map__build_node_map(evsel_list->core.cpus, &stat_config.aggr_map)) {
1295 perror("cannot build core map");
1298 stat_config.aggr_get_id = perf_stat__get_node_cached;
1301 if (term_percore_set()) {
1302 if (cpu_map__build_core_map(evsel_list->core.cpus,
1303 &stat_config.aggr_map)) {
1304 perror("cannot build core map");
1307 stat_config.aggr_get_id = perf_stat__get_core_cached;
1318 * The evsel_list->cpus is the base we operate on,
1319 * taking the highest cpu number to be the size of
1320 * the aggregation translate cpumap.
1322 nr = perf_cpu_map__max(evsel_list->core.cpus);
1323 stat_config.cpus_aggr_map = cpu_aggr_map__empty_new(nr + 1);
1324 return stat_config.cpus_aggr_map ? 0 : -ENOMEM;
1327 static void cpu_aggr_map__delete(struct cpu_aggr_map *map)
1330 WARN_ONCE(refcount_read(&map->refcnt) != 0,
1331 "cpu_aggr_map refcnt unbalanced\n");
1336 static void cpu_aggr_map__put(struct cpu_aggr_map *map)
1338 if (map && refcount_dec_and_test(&map->refcnt))
1339 cpu_aggr_map__delete(map);
1342 static void perf_stat__exit_aggr_mode(void)
1344 cpu_aggr_map__put(stat_config.aggr_map);
1345 cpu_aggr_map__put(stat_config.cpus_aggr_map);
1346 stat_config.aggr_map = NULL;
1347 stat_config.cpus_aggr_map = NULL;
1350 static inline int perf_env__get_cpu(struct perf_env *env, struct perf_cpu_map *map, int idx)
1357 cpu = map->map[idx];
1359 if (cpu >= env->nr_cpus_avail)
1365 static struct aggr_cpu_id perf_env__get_socket(struct perf_cpu_map *map, int idx, void *data)
1367 struct perf_env *env = data;
1368 int cpu = perf_env__get_cpu(env, map, idx);
1369 struct aggr_cpu_id id = cpu_map__empty_aggr_cpu_id();
1372 id.socket = env->cpu[cpu].socket_id;
1377 static struct aggr_cpu_id perf_env__get_die(struct perf_cpu_map *map, int idx, void *data)
1379 struct perf_env *env = data;
1380 struct aggr_cpu_id id = cpu_map__empty_aggr_cpu_id();
1381 int cpu = perf_env__get_cpu(env, map, idx);
1385 * die_id is relative to socket, so start
1386 * with the socket ID and then add die to
1389 id.socket = env->cpu[cpu].socket_id;
1390 id.die = env->cpu[cpu].die_id;
1396 static struct aggr_cpu_id perf_env__get_core(struct perf_cpu_map *map, int idx, void *data)
1398 struct perf_env *env = data;
1399 struct aggr_cpu_id id = cpu_map__empty_aggr_cpu_id();
1400 int cpu = perf_env__get_cpu(env, map, idx);
1404 * core_id is relative to socket and die,
1405 * we need a global id. So we combine
1406 * socket + die id + core id
1408 if (WARN_ONCE(env->cpu[cpu].core_id >> 16, "The core id number is too big.\n"))
1409 return cpu_map__empty_aggr_cpu_id();
1411 id.socket = env->cpu[cpu].socket_id;
1412 id.die = env->cpu[cpu].die_id;
1413 id.id = env->cpu[cpu].core_id & 0xffff;
1419 static struct aggr_cpu_id perf_env__get_node(struct perf_cpu_map *map, int idx, void *data)
1421 int cpu = perf_env__get_cpu(data, map, idx);
1422 struct aggr_cpu_id id = cpu_map__empty_aggr_cpu_id();
1424 id.node = perf_env__numa_node(data, cpu);
1428 static int perf_env__build_socket_map(struct perf_env *env, struct perf_cpu_map *cpus,
1429 struct cpu_aggr_map **sockp)
1431 return cpu_map__build_map(cpus, sockp, perf_env__get_socket, env);
1434 static int perf_env__build_die_map(struct perf_env *env, struct perf_cpu_map *cpus,
1435 struct cpu_aggr_map **diep)
1437 return cpu_map__build_map(cpus, diep, perf_env__get_die, env);
1440 static int perf_env__build_core_map(struct perf_env *env, struct perf_cpu_map *cpus,
1441 struct cpu_aggr_map **corep)
1443 return cpu_map__build_map(cpus, corep, perf_env__get_core, env);
1446 static int perf_env__build_node_map(struct perf_env *env, struct perf_cpu_map *cpus,
1447 struct cpu_aggr_map **nodep)
1449 return cpu_map__build_map(cpus, nodep, perf_env__get_node, env);
1452 static struct aggr_cpu_id perf_stat__get_socket_file(struct perf_stat_config *config __maybe_unused,
1453 struct perf_cpu_map *map, int idx)
1455 return perf_env__get_socket(map, idx, &perf_stat.session->header.env);
1457 static struct aggr_cpu_id perf_stat__get_die_file(struct perf_stat_config *config __maybe_unused,
1458 struct perf_cpu_map *map, int idx)
1460 return perf_env__get_die(map, idx, &perf_stat.session->header.env);
1463 static struct aggr_cpu_id perf_stat__get_core_file(struct perf_stat_config *config __maybe_unused,
1464 struct perf_cpu_map *map, int idx)
1466 return perf_env__get_core(map, idx, &perf_stat.session->header.env);
1469 static struct aggr_cpu_id perf_stat__get_node_file(struct perf_stat_config *config __maybe_unused,
1470 struct perf_cpu_map *map, int idx)
1472 return perf_env__get_node(map, idx, &perf_stat.session->header.env);
1475 static int perf_stat_init_aggr_mode_file(struct perf_stat *st)
1477 struct perf_env *env = &st->session->header.env;
1479 switch (stat_config.aggr_mode) {
1481 if (perf_env__build_socket_map(env, evsel_list->core.cpus, &stat_config.aggr_map)) {
1482 perror("cannot build socket map");
1485 stat_config.aggr_get_id = perf_stat__get_socket_file;
1488 if (perf_env__build_die_map(env, evsel_list->core.cpus, &stat_config.aggr_map)) {
1489 perror("cannot build die map");
1492 stat_config.aggr_get_id = perf_stat__get_die_file;
1495 if (perf_env__build_core_map(env, evsel_list->core.cpus, &stat_config.aggr_map)) {
1496 perror("cannot build core map");
1499 stat_config.aggr_get_id = perf_stat__get_core_file;
1502 if (perf_env__build_node_map(env, evsel_list->core.cpus, &stat_config.aggr_map)) {
1503 perror("cannot build core map");
1506 stat_config.aggr_get_id = perf_stat__get_node_file;
1520 * Add default attributes, if there were no attributes specified or
1521 * if -d/--detailed, -d -d or -d -d -d is used:
1523 static int add_default_attributes(void)
1526 struct perf_event_attr default_attrs0[] = {
1528 { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_TASK_CLOCK },
1529 { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_CONTEXT_SWITCHES },
1530 { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_CPU_MIGRATIONS },
1531 { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_PAGE_FAULTS },
1533 { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_CPU_CYCLES },
1535 struct perf_event_attr frontend_attrs[] = {
1536 { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_STALLED_CYCLES_FRONTEND },
1538 struct perf_event_attr backend_attrs[] = {
1539 { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_STALLED_CYCLES_BACKEND },
1541 struct perf_event_attr default_attrs1[] = {
1542 { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_INSTRUCTIONS },
1543 { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_BRANCH_INSTRUCTIONS },
1544 { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_BRANCH_MISSES },
1549 * Detailed stats (-d), covering the L1 and last level data caches:
1551 struct perf_event_attr detailed_attrs[] = {
1553 { .type = PERF_TYPE_HW_CACHE,
1555 PERF_COUNT_HW_CACHE_L1D << 0 |
1556 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
1557 (PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16) },
1559 { .type = PERF_TYPE_HW_CACHE,
1561 PERF_COUNT_HW_CACHE_L1D << 0 |
1562 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
1563 (PERF_COUNT_HW_CACHE_RESULT_MISS << 16) },
1565 { .type = PERF_TYPE_HW_CACHE,
1567 PERF_COUNT_HW_CACHE_LL << 0 |
1568 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
1569 (PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16) },
1571 { .type = PERF_TYPE_HW_CACHE,
1573 PERF_COUNT_HW_CACHE_LL << 0 |
1574 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
1575 (PERF_COUNT_HW_CACHE_RESULT_MISS << 16) },
1579 * Very detailed stats (-d -d), covering the instruction cache and the TLB caches:
1581 struct perf_event_attr very_detailed_attrs[] = {
1583 { .type = PERF_TYPE_HW_CACHE,
1585 PERF_COUNT_HW_CACHE_L1I << 0 |
1586 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
1587 (PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16) },
1589 { .type = PERF_TYPE_HW_CACHE,
1591 PERF_COUNT_HW_CACHE_L1I << 0 |
1592 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
1593 (PERF_COUNT_HW_CACHE_RESULT_MISS << 16) },
1595 { .type = PERF_TYPE_HW_CACHE,
1597 PERF_COUNT_HW_CACHE_DTLB << 0 |
1598 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
1599 (PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16) },
1601 { .type = PERF_TYPE_HW_CACHE,
1603 PERF_COUNT_HW_CACHE_DTLB << 0 |
1604 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
1605 (PERF_COUNT_HW_CACHE_RESULT_MISS << 16) },
1607 { .type = PERF_TYPE_HW_CACHE,
1609 PERF_COUNT_HW_CACHE_ITLB << 0 |
1610 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
1611 (PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16) },
1613 { .type = PERF_TYPE_HW_CACHE,
1615 PERF_COUNT_HW_CACHE_ITLB << 0 |
1616 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
1617 (PERF_COUNT_HW_CACHE_RESULT_MISS << 16) },
1622 * Very, very detailed stats (-d -d -d), adding prefetch events:
1624 struct perf_event_attr very_very_detailed_attrs[] = {
1626 { .type = PERF_TYPE_HW_CACHE,
1628 PERF_COUNT_HW_CACHE_L1D << 0 |
1629 (PERF_COUNT_HW_CACHE_OP_PREFETCH << 8) |
1630 (PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16) },
1632 { .type = PERF_TYPE_HW_CACHE,
1634 PERF_COUNT_HW_CACHE_L1D << 0 |
1635 (PERF_COUNT_HW_CACHE_OP_PREFETCH << 8) |
1636 (PERF_COUNT_HW_CACHE_RESULT_MISS << 16) },
1638 struct parse_events_error errinfo;
1640 /* Set attrs if no event is selected and !null_run: */
1641 if (stat_config.null_run)
1644 bzero(&errinfo, sizeof(errinfo));
1645 if (transaction_run) {
1646 /* Handle -T as -M transaction. Once platform specific metrics
1647 * support has been added to the json files, all archictures
1648 * will use this approach. To determine transaction support
1649 * on an architecture test for such a metric name.
1651 if (metricgroup__has_metric("transaction")) {
1652 struct option opt = { .value = &evsel_list };
1654 return metricgroup__parse_groups(&opt, "transaction",
1655 stat_config.metric_no_group,
1656 stat_config.metric_no_merge,
1657 &stat_config.metric_events);
1660 if (pmu_have_event("cpu", "cycles-ct") &&
1661 pmu_have_event("cpu", "el-start"))
1662 err = parse_events(evsel_list, transaction_attrs,
1665 err = parse_events(evsel_list,
1666 transaction_limited_attrs,
1669 fprintf(stderr, "Cannot set up transaction events\n");
1670 parse_events_print_error(&errinfo, transaction_attrs);
1679 if (sysfs__read_int(FREEZE_ON_SMI_PATH, &smi) < 0) {
1680 fprintf(stderr, "freeze_on_smi is not supported.\n");
1685 if (sysfs__write_int(FREEZE_ON_SMI_PATH, 1) < 0) {
1686 fprintf(stderr, "Failed to set freeze_on_smi.\n");
1692 if (pmu_have_event("msr", "aperf") &&
1693 pmu_have_event("msr", "smi")) {
1694 if (!force_metric_only)
1695 stat_config.metric_only = true;
1696 err = parse_events(evsel_list, smi_cost_attrs, &errinfo);
1698 fprintf(stderr, "To measure SMI cost, it needs "
1699 "msr/aperf/, msr/smi/ and cpu/cycles/ support\n");
1700 parse_events_print_error(&errinfo, smi_cost_attrs);
1704 parse_events_print_error(&errinfo, smi_cost_attrs);
1705 fprintf(stderr, "Cannot set up SMI cost events\n");
1715 if (!force_metric_only)
1716 stat_config.metric_only = true;
1718 if (topdown_filter_events(topdown_metric_attrs, &str, 1) < 0) {
1719 pr_err("Out of memory\n");
1722 if (topdown_metric_attrs[0] && str) {
1723 if (!stat_config.interval && !stat_config.metric_only) {
1724 fprintf(stat_config.output,
1725 "Topdown accuracy may decrease when measuring long periods.\n"
1726 "Please print the result regularly, e.g. -I1000\n");
1733 if (stat_config.aggr_mode != AGGR_GLOBAL &&
1734 stat_config.aggr_mode != AGGR_CORE) {
1735 pr_err("top down event configuration requires --per-core mode\n");
1738 stat_config.aggr_mode = AGGR_CORE;
1739 if (nr_cgroups || !target__has_cpu(&target)) {
1740 pr_err("top down event configuration requires system-wide mode (-a)\n");
1744 if (topdown_filter_events(topdown_attrs, &str,
1745 arch_topdown_check_group(&warn)) < 0) {
1746 pr_err("Out of memory\n");
1749 if (topdown_attrs[0] && str) {
1751 arch_topdown_group_warn();
1753 err = parse_events(evsel_list, str, &errinfo);
1756 "Cannot set up top down events %s: %d\n",
1758 parse_events_print_error(&errinfo, str);
1763 fprintf(stderr, "System does not support topdown\n");
1769 if (!evsel_list->core.nr_entries) {
1770 if (target__has_cpu(&target))
1771 default_attrs0[0].config = PERF_COUNT_SW_CPU_CLOCK;
1773 if (evlist__add_default_attrs(evsel_list, default_attrs0) < 0)
1775 if (pmu_have_event("cpu", "stalled-cycles-frontend")) {
1776 if (evlist__add_default_attrs(evsel_list, frontend_attrs) < 0)
1779 if (pmu_have_event("cpu", "stalled-cycles-backend")) {
1780 if (evlist__add_default_attrs(evsel_list, backend_attrs) < 0)
1783 if (evlist__add_default_attrs(evsel_list, default_attrs1) < 0)
1787 /* Detailed events get appended to the event list: */
1789 if (detailed_run < 1)
1792 /* Append detailed run extra attributes: */
1793 if (evlist__add_default_attrs(evsel_list, detailed_attrs) < 0)
1796 if (detailed_run < 2)
1799 /* Append very detailed run extra attributes: */
1800 if (evlist__add_default_attrs(evsel_list, very_detailed_attrs) < 0)
1803 if (detailed_run < 3)
1806 /* Append very, very detailed run extra attributes: */
1807 return evlist__add_default_attrs(evsel_list, very_very_detailed_attrs);
1810 static const char * const stat_record_usage[] = {
1811 "perf stat record [<options>]",
1815 static void init_features(struct perf_session *session)
1819 for (feat = HEADER_FIRST_FEATURE; feat < HEADER_LAST_FEATURE; feat++)
1820 perf_header__set_feat(&session->header, feat);
1822 perf_header__clear_feat(&session->header, HEADER_DIR_FORMAT);
1823 perf_header__clear_feat(&session->header, HEADER_BUILD_ID);
1824 perf_header__clear_feat(&session->header, HEADER_TRACING_DATA);
1825 perf_header__clear_feat(&session->header, HEADER_BRANCH_STACK);
1826 perf_header__clear_feat(&session->header, HEADER_AUXTRACE);
1829 static int __cmd_record(int argc, const char **argv)
1831 struct perf_session *session;
1832 struct perf_data *data = &perf_stat.data;
1834 argc = parse_options(argc, argv, stat_options, stat_record_usage,
1835 PARSE_OPT_STOP_AT_NON_OPTION);
1838 data->path = output_name;
1840 if (stat_config.run_count != 1 || forever) {
1841 pr_err("Cannot use -r option with perf stat record.\n");
1845 session = perf_session__new(data, false, NULL);
1846 if (IS_ERR(session)) {
1847 pr_err("Perf session creation failed\n");
1848 return PTR_ERR(session);
1851 init_features(session);
1853 session->evlist = evsel_list;
1854 perf_stat.session = session;
1855 perf_stat.record = true;
1859 static int process_stat_round_event(struct perf_session *session,
1860 union perf_event *event)
1862 struct perf_record_stat_round *stat_round = &event->stat_round;
1863 struct evsel *counter;
1864 struct timespec tsh, *ts = NULL;
1865 const char **argv = session->header.env.cmdline_argv;
1866 int argc = session->header.env.nr_cmdline;
1868 evlist__for_each_entry(evsel_list, counter)
1869 perf_stat_process_counter(&stat_config, counter);
1871 if (stat_round->type == PERF_STAT_ROUND_TYPE__FINAL)
1872 update_stats(&walltime_nsecs_stats, stat_round->time);
1874 if (stat_config.interval && stat_round->time) {
1875 tsh.tv_sec = stat_round->time / NSEC_PER_SEC;
1876 tsh.tv_nsec = stat_round->time % NSEC_PER_SEC;
1880 print_counters(ts, argc, argv);
1885 int process_stat_config_event(struct perf_session *session,
1886 union perf_event *event)
1888 struct perf_tool *tool = session->tool;
1889 struct perf_stat *st = container_of(tool, struct perf_stat, tool);
1891 perf_event__read_stat_config(&stat_config, &event->stat_config);
1893 if (perf_cpu_map__empty(st->cpus)) {
1894 if (st->aggr_mode != AGGR_UNSET)
1895 pr_warning("warning: processing task data, aggregation mode not set\n");
1899 if (st->aggr_mode != AGGR_UNSET)
1900 stat_config.aggr_mode = st->aggr_mode;
1902 if (perf_stat.data.is_pipe)
1903 perf_stat_init_aggr_mode();
1905 perf_stat_init_aggr_mode_file(st);
1910 static int set_maps(struct perf_stat *st)
1912 if (!st->cpus || !st->threads)
1915 if (WARN_ONCE(st->maps_allocated, "stats double allocation\n"))
1918 perf_evlist__set_maps(&evsel_list->core, st->cpus, st->threads);
1920 if (evlist__alloc_stats(evsel_list, true))
1923 st->maps_allocated = true;
1928 int process_thread_map_event(struct perf_session *session,
1929 union perf_event *event)
1931 struct perf_tool *tool = session->tool;
1932 struct perf_stat *st = container_of(tool, struct perf_stat, tool);
1935 pr_warning("Extra thread map event, ignoring.\n");
1939 st->threads = thread_map__new_event(&event->thread_map);
1943 return set_maps(st);
1947 int process_cpu_map_event(struct perf_session *session,
1948 union perf_event *event)
1950 struct perf_tool *tool = session->tool;
1951 struct perf_stat *st = container_of(tool, struct perf_stat, tool);
1952 struct perf_cpu_map *cpus;
1955 pr_warning("Extra cpu map event, ignoring.\n");
1959 cpus = cpu_map__new_data(&event->cpu_map.data);
1964 return set_maps(st);
1967 static const char * const stat_report_usage[] = {
1968 "perf stat report [<options>]",
1972 static struct perf_stat perf_stat = {
1974 .attr = perf_event__process_attr,
1975 .event_update = perf_event__process_event_update,
1976 .thread_map = process_thread_map_event,
1977 .cpu_map = process_cpu_map_event,
1978 .stat_config = process_stat_config_event,
1979 .stat = perf_event__process_stat_event,
1980 .stat_round = process_stat_round_event,
1982 .aggr_mode = AGGR_UNSET,
1985 static int __cmd_report(int argc, const char **argv)
1987 struct perf_session *session;
1988 const struct option options[] = {
1989 OPT_STRING('i', "input", &input_name, "file", "input file name"),
1990 OPT_SET_UINT(0, "per-socket", &perf_stat.aggr_mode,
1991 "aggregate counts per processor socket", AGGR_SOCKET),
1992 OPT_SET_UINT(0, "per-die", &perf_stat.aggr_mode,
1993 "aggregate counts per processor die", AGGR_DIE),
1994 OPT_SET_UINT(0, "per-core", &perf_stat.aggr_mode,
1995 "aggregate counts per physical processor core", AGGR_CORE),
1996 OPT_SET_UINT(0, "per-node", &perf_stat.aggr_mode,
1997 "aggregate counts per numa node", AGGR_NODE),
1998 OPT_SET_UINT('A', "no-aggr", &perf_stat.aggr_mode,
1999 "disable CPU count aggregation", AGGR_NONE),
2005 argc = parse_options(argc, argv, options, stat_report_usage, 0);
2007 if (!input_name || !strlen(input_name)) {
2008 if (!fstat(STDIN_FILENO, &st) && S_ISFIFO(st.st_mode))
2011 input_name = "perf.data";
2014 perf_stat.data.path = input_name;
2015 perf_stat.data.mode = PERF_DATA_MODE_READ;
2017 session = perf_session__new(&perf_stat.data, false, &perf_stat.tool);
2018 if (IS_ERR(session))
2019 return PTR_ERR(session);
2021 perf_stat.session = session;
2022 stat_config.output = stderr;
2023 evsel_list = session->evlist;
2025 ret = perf_session__process_events(session);
2029 perf_session__delete(session);
2033 static void setup_system_wide(int forks)
2036 * Make system wide (-a) the default target if
2037 * no target was specified and one of following
2038 * conditions is met:
2040 * - there's no workload specified
2041 * - there is workload specified but all requested
2042 * events are system wide events
2044 if (!target__none(&target))
2048 target.system_wide = true;
2050 struct evsel *counter;
2052 evlist__for_each_entry(evsel_list, counter) {
2053 if (!counter->core.system_wide &&
2054 strcmp(counter->name, "duration_time")) {
2059 if (evsel_list->core.nr_entries)
2060 target.system_wide = true;
2064 int cmd_stat(int argc, const char **argv)
2066 const char * const stat_usage[] = {
2067 "perf stat [<options>] [<command>]",
2070 int status = -EINVAL, run_idx;
2072 FILE *output = stderr;
2073 unsigned int interval, timeout;
2074 const char * const stat_subcommands[] = { "record", "report" };
2076 setlocale(LC_ALL, "");
2078 evsel_list = evlist__new();
2079 if (evsel_list == NULL)
2082 parse_events__shrink_config_terms();
2084 /* String-parsing callback-based options would segfault when negated */
2085 set_option_flag(stat_options, 'e', "event", PARSE_OPT_NONEG);
2086 set_option_flag(stat_options, 'M', "metrics", PARSE_OPT_NONEG);
2087 set_option_flag(stat_options, 'G', "cgroup", PARSE_OPT_NONEG);
2089 argc = parse_options_subcommand(argc, argv, stat_options, stat_subcommands,
2090 (const char **) stat_usage,
2091 PARSE_OPT_STOP_AT_NON_OPTION);
2092 perf_stat__collect_metric_expr(evsel_list);
2093 perf_stat__init_shadow_stats();
2095 if (stat_config.csv_sep) {
2096 stat_config.csv_output = true;
2097 if (!strcmp(stat_config.csv_sep, "\\t"))
2098 stat_config.csv_sep = "\t";
2100 stat_config.csv_sep = DEFAULT_SEPARATOR;
2102 if (argc && !strncmp(argv[0], "rec", 3)) {
2103 argc = __cmd_record(argc, argv);
2106 } else if (argc && !strncmp(argv[0], "rep", 3))
2107 return __cmd_report(argc, argv);
2109 interval = stat_config.interval;
2110 timeout = stat_config.timeout;
2113 * For record command the -o is already taken care of.
2115 if (!STAT_RECORD && output_name && strcmp(output_name, "-"))
2118 if (output_name && output_fd) {
2119 fprintf(stderr, "cannot use both --output and --log-fd\n");
2120 parse_options_usage(stat_usage, stat_options, "o", 1);
2121 parse_options_usage(NULL, stat_options, "log-fd", 0);
2125 if (stat_config.metric_only && stat_config.aggr_mode == AGGR_THREAD) {
2126 fprintf(stderr, "--metric-only is not supported with --per-thread\n");
2130 if (stat_config.metric_only && stat_config.run_count > 1) {
2131 fprintf(stderr, "--metric-only is not supported with -r\n");
2135 if (stat_config.walltime_run_table && stat_config.run_count <= 1) {
2136 fprintf(stderr, "--table is only supported with -r\n");
2137 parse_options_usage(stat_usage, stat_options, "r", 1);
2138 parse_options_usage(NULL, stat_options, "table", 0);
2142 if (output_fd < 0) {
2143 fprintf(stderr, "argument to --log-fd must be a > 0\n");
2144 parse_options_usage(stat_usage, stat_options, "log-fd", 0);
2148 if (!output && !stat_config.quiet) {
2150 mode = append_file ? "a" : "w";
2152 output = fopen(output_name, mode);
2154 perror("failed to create output file");
2157 clock_gettime(CLOCK_REALTIME, &tm);
2158 fprintf(output, "# started on %s\n", ctime(&tm.tv_sec));
2159 } else if (output_fd > 0) {
2160 mode = append_file ? "a" : "w";
2161 output = fdopen(output_fd, mode);
2163 perror("Failed opening logfd");
2168 stat_config.output = output;
2171 * let the spreadsheet do the pretty-printing
2173 if (stat_config.csv_output) {
2174 /* User explicitly passed -B? */
2175 if (big_num_opt == 1) {
2176 fprintf(stderr, "-B option not supported with -x\n");
2177 parse_options_usage(stat_usage, stat_options, "B", 1);
2178 parse_options_usage(NULL, stat_options, "x", 1);
2180 } else /* Nope, so disable big number formatting */
2181 stat_config.big_num = false;
2182 } else if (big_num_opt == 0) /* User passed --no-big-num */
2183 stat_config.big_num = false;
2185 setup_system_wide(argc);
2188 * Display user/system times only for single
2189 * run and when there's specified tracee.
2191 if ((stat_config.run_count == 1) && target__none(&target))
2192 stat_config.ru_display = true;
2194 if (stat_config.run_count < 0) {
2195 pr_err("Run count must be a positive number\n");
2196 parse_options_usage(stat_usage, stat_options, "r", 1);
2198 } else if (stat_config.run_count == 0) {
2200 stat_config.run_count = 1;
2203 if (stat_config.walltime_run_table) {
2204 stat_config.walltime_run = zalloc(stat_config.run_count * sizeof(stat_config.walltime_run[0]));
2205 if (!stat_config.walltime_run) {
2206 pr_err("failed to setup -r option");
2211 if ((stat_config.aggr_mode == AGGR_THREAD) &&
2212 !target__has_task(&target)) {
2213 if (!target.system_wide || target.cpu_list) {
2214 fprintf(stderr, "The --per-thread option is only "
2215 "available when monitoring via -p -t -a "
2216 "options or only --per-thread.\n");
2217 parse_options_usage(NULL, stat_options, "p", 1);
2218 parse_options_usage(NULL, stat_options, "t", 1);
2224 * no_aggr, cgroup are for system-wide only
2225 * --per-thread is aggregated per thread, we dont mix it with cpu mode
2227 if (((stat_config.aggr_mode != AGGR_GLOBAL &&
2228 stat_config.aggr_mode != AGGR_THREAD) || nr_cgroups) &&
2229 !target__has_cpu(&target)) {
2230 fprintf(stderr, "both cgroup and no-aggregation "
2231 "modes only available in system-wide mode\n");
2233 parse_options_usage(stat_usage, stat_options, "G", 1);
2234 parse_options_usage(NULL, stat_options, "A", 1);
2235 parse_options_usage(NULL, stat_options, "a", 1);
2239 if (add_default_attributes())
2242 if (stat_config.cgroup_list) {
2243 if (nr_cgroups > 0) {
2244 pr_err("--cgroup and --for-each-cgroup cannot be used together\n");
2245 parse_options_usage(stat_usage, stat_options, "G", 1);
2246 parse_options_usage(NULL, stat_options, "for-each-cgroup", 0);
2250 if (evlist__expand_cgroup(evsel_list, stat_config.cgroup_list,
2251 &stat_config.metric_events, true) < 0) {
2252 parse_options_usage(stat_usage, stat_options,
2253 "for-each-cgroup", 0);
2258 target__validate(&target);
2260 if ((stat_config.aggr_mode == AGGR_THREAD) && (target.system_wide))
2261 target.per_thread = true;
2263 if (evlist__create_maps(evsel_list, &target) < 0) {
2264 if (target__has_task(&target)) {
2265 pr_err("Problems finding threads of monitor\n");
2266 parse_options_usage(stat_usage, stat_options, "p", 1);
2267 parse_options_usage(NULL, stat_options, "t", 1);
2268 } else if (target__has_cpu(&target)) {
2269 perror("failed to parse CPUs map");
2270 parse_options_usage(stat_usage, stat_options, "C", 1);
2271 parse_options_usage(NULL, stat_options, "a", 1);
2276 evlist__check_cpu_maps(evsel_list);
2279 * Initialize thread_map with comm names,
2280 * so we could print it out on output.
2282 if (stat_config.aggr_mode == AGGR_THREAD) {
2283 thread_map__read_comms(evsel_list->core.threads);
2284 if (target.system_wide) {
2285 if (runtime_stat_new(&stat_config,
2286 perf_thread_map__nr(evsel_list->core.threads))) {
2292 if (stat_config.aggr_mode == AGGR_NODE)
2293 cpu__setup_cpunode_map();
2295 if (stat_config.times && interval)
2296 interval_count = true;
2297 else if (stat_config.times && !interval) {
2298 pr_err("interval-count option should be used together with "
2299 "interval-print.\n");
2300 parse_options_usage(stat_usage, stat_options, "interval-count", 0);
2301 parse_options_usage(stat_usage, stat_options, "I", 1);
2305 if (timeout && timeout < 100) {
2307 pr_err("timeout must be >= 10ms.\n");
2308 parse_options_usage(stat_usage, stat_options, "timeout", 0);
2311 pr_warning("timeout < 100ms. "
2312 "The overhead percentage could be high in some cases. "
2313 "Please proceed with caution.\n");
2315 if (timeout && interval) {
2316 pr_err("timeout option is not supported with interval-print.\n");
2317 parse_options_usage(stat_usage, stat_options, "timeout", 0);
2318 parse_options_usage(stat_usage, stat_options, "I", 1);
2322 if (evlist__alloc_stats(evsel_list, interval))
2325 if (perf_stat_init_aggr_mode())
2329 * Set sample_type to PERF_SAMPLE_IDENTIFIER, which should be harmless
2330 * while avoiding that older tools show confusing messages.
2332 * However for pipe sessions we need to keep it zero,
2333 * because script's perf_evsel__check_attr is triggered
2334 * by attr->sample_type != 0, and we can't run it on
2337 stat_config.identifier = !(STAT_RECORD && perf_stat.data.is_pipe);
2340 * We dont want to block the signals - that would cause
2341 * child tasks to inherit that and Ctrl-C would not work.
2342 * What we want is for Ctrl-C to work in the exec()-ed
2343 * task, but being ignored by perf stat itself:
2347 signal(SIGINT, skip_signal);
2348 signal(SIGCHLD, skip_signal);
2349 signal(SIGALRM, skip_signal);
2350 signal(SIGABRT, skip_signal);
2352 if (evlist__initialize_ctlfd(evsel_list, stat_config.ctl_fd, stat_config.ctl_fd_ack))
2356 for (run_idx = 0; forever || run_idx < stat_config.run_count; run_idx++) {
2357 if (stat_config.run_count != 1 && verbose > 0)
2358 fprintf(output, "[ perf stat: executing run #%d ... ]\n",
2362 evlist__reset_prev_raw_counts(evsel_list);
2364 status = run_perf_stat(argc, argv, run_idx);
2365 if (forever && status != -1 && !interval) {
2366 print_counters(NULL, argc, argv);
2367 perf_stat__reset_stats();
2371 if (!forever && status != -1 && (!interval || stat_config.summary))
2372 print_counters(NULL, argc, argv);
2374 evlist__finalize_ctlfd(evsel_list);
2378 * We synthesize the kernel mmap record just so that older tools
2379 * don't emit warnings about not being able to resolve symbols
2380 * due to /proc/sys/kernel/kptr_restrict settings and instear provide
2381 * a saner message about no samples being in the perf.data file.
2383 * This also serves to suppress a warning about f_header.data.size == 0
2384 * in header.c at the moment 'perf stat record' gets introduced, which
2385 * is not really needed once we start adding the stat specific PERF_RECORD_
2386 * records, but the need to suppress the kptr_restrict messages in older
2387 * tools remain -acme
2389 int fd = perf_data__fd(&perf_stat.data);
2390 int err = perf_event__synthesize_kernel_mmap((void *)&perf_stat,
2391 process_synthesized_event,
2392 &perf_stat.session->machines.host);
2394 pr_warning("Couldn't synthesize the kernel mmap record, harmless, "
2395 "older tools may produce warnings about this file\n.");
2399 if (WRITE_STAT_ROUND_EVENT(walltime_nsecs_stats.max, FINAL))
2400 pr_err("failed to write stat round event\n");
2403 if (!perf_stat.data.is_pipe) {
2404 perf_stat.session->header.data_size += perf_stat.bytes_written;
2405 perf_session__write_header(perf_stat.session, evsel_list, fd, true);
2408 evlist__close(evsel_list);
2409 perf_session__delete(perf_stat.session);
2412 perf_stat__exit_aggr_mode();
2413 evlist__free_stats(evsel_list);
2415 zfree(&stat_config.walltime_run);
2417 if (smi_cost && smi_reset)
2418 sysfs__write_int(FREEZE_ON_SMI_PATH, 0);
2420 evlist__delete(evsel_list);
2422 metricgroup__rblist_exit(&stat_config.metric_events);
2423 runtime_stat_delete(&stat_config);
2424 evlist__close_control(stat_config.ctl_fd, stat_config.ctl_fd_ack, &stat_config.ctl_fd_close);