4 * Builtin stat command: Give a precise performance counters summary
5 * overview about any workload, CPU or specific PID.
9 $ perf stat ./hackbench 10
13 Performance counter stats for './hackbench 10':
15 1708.761321 task-clock # 11.037 CPUs utilized
16 41,190 context-switches # 0.024 M/sec
17 6,735 CPU-migrations # 0.004 M/sec
18 17,318 page-faults # 0.010 M/sec
19 5,205,202,243 cycles # 3.046 GHz
20 3,856,436,920 stalled-cycles-frontend # 74.09% frontend cycles idle
21 1,600,790,871 stalled-cycles-backend # 30.75% backend cycles idle
22 2,603,501,247 instructions # 0.50 insns per cycle
23 # 1.48 stalled cycles per insn
24 484,357,498 branches # 283.455 M/sec
25 6,388,934 branch-misses # 1.32% of all branches
27 0.154822978 seconds time elapsed
30 * Copyright (C) 2008-2011, Red Hat Inc, Ingo Molnar <mingo@redhat.com>
32 * Improvements and fixes by:
34 * Arjan van de Ven <arjan@linux.intel.com>
35 * Yanmin Zhang <yanmin.zhang@intel.com>
36 * Wu Fengguang <fengguang.wu@intel.com>
37 * Mike Galbraith <efault@gmx.de>
38 * Paul Mackerras <paulus@samba.org>
39 * Jaswinder Singh Rajput <jaswinder@kernel.org>
41 * Released under the GPL v2. (and only v2, not any later version)
46 #include "util/cgroup.h"
47 #include "util/util.h"
48 #include "util/parse-options.h"
49 #include "util/parse-events.h"
51 #include "util/event.h"
52 #include "util/evlist.h"
53 #include "util/evsel.h"
54 #include "util/debug.h"
55 #include "util/color.h"
56 #include "util/stat.h"
57 #include "util/header.h"
58 #include "util/cpumap.h"
59 #include "util/thread.h"
60 #include "util/thread_map.h"
61 #include "util/counts.h"
64 #include <sys/prctl.h>
67 #define DEFAULT_SEPARATOR " "
68 #define CNTR_NOT_SUPPORTED "<not supported>"
69 #define CNTR_NOT_COUNTED "<not counted>"
71 static void print_counters(struct timespec
*ts
, int argc
, const char **argv
);
73 /* Default events used for perf stat -T */
74 static const char *transaction_attrs
= {
86 /* More limited version when the CPU does not have all events. */
87 static const char * transaction_limited_attrs
= {
97 static struct perf_evlist
*evsel_list
;
99 static struct target target
= {
103 typedef int (*aggr_get_id_t
)(struct cpu_map
*m
, int cpu
);
105 static int run_count
= 1;
106 static bool no_inherit
= false;
107 static volatile pid_t child_pid
= -1;
108 static bool null_run
= false;
109 static int detailed_run
= 0;
110 static bool transaction_run
;
111 static bool big_num
= true;
112 static int big_num_opt
= -1;
113 static const char *csv_sep
= NULL
;
114 static bool csv_output
= false;
115 static bool group
= false;
116 static const char *pre_cmd
= NULL
;
117 static const char *post_cmd
= NULL
;
118 static bool sync_run
= false;
119 static unsigned int initial_delay
= 0;
120 static unsigned int unit_width
= 4; /* strlen("unit") */
121 static bool forever
= false;
122 static struct timespec ref_time
;
123 static struct cpu_map
*aggr_map
;
124 static aggr_get_id_t aggr_get_id
;
126 static volatile int done
= 0;
128 static struct perf_stat_config stat_config
= {
129 .aggr_mode
= AGGR_GLOBAL
,
133 static inline void diff_timespec(struct timespec
*r
, struct timespec
*a
,
136 r
->tv_sec
= a
->tv_sec
- b
->tv_sec
;
137 if (a
->tv_nsec
< b
->tv_nsec
) {
138 r
->tv_nsec
= a
->tv_nsec
+ 1000000000L - b
->tv_nsec
;
141 r
->tv_nsec
= a
->tv_nsec
- b
->tv_nsec
;
145 static void perf_stat__reset_stats(void)
147 perf_evlist__reset_stats(evsel_list
);
148 perf_stat__reset_shadow_stats();
151 static int create_perf_stat_counter(struct perf_evsel
*evsel
)
153 struct perf_event_attr
*attr
= &evsel
->attr
;
155 if (stat_config
.scale
)
156 attr
->read_format
= PERF_FORMAT_TOTAL_TIME_ENABLED
|
157 PERF_FORMAT_TOTAL_TIME_RUNNING
;
159 attr
->inherit
= !no_inherit
;
161 if (target__has_cpu(&target
))
162 return perf_evsel__open_per_cpu(evsel
, perf_evsel__cpus(evsel
));
164 if (!target__has_task(&target
) && perf_evsel__is_group_leader(evsel
)) {
167 attr
->enable_on_exec
= 1;
170 return perf_evsel__open_per_thread(evsel
, evsel_list
->threads
);
174 * Does the counter have nsecs as a unit?
176 static inline int nsec_counter(struct perf_evsel
*evsel
)
178 if (perf_evsel__match(evsel
, SOFTWARE
, SW_CPU_CLOCK
) ||
179 perf_evsel__match(evsel
, SOFTWARE
, SW_TASK_CLOCK
))
186 * Read out the results of a single counter:
187 * do not aggregate counts across CPUs in system-wide mode
189 static int read_counter(struct perf_evsel
*counter
)
191 int nthreads
= thread_map__nr(evsel_list
->threads
);
192 int ncpus
= perf_evsel__nr_cpus(counter
);
195 if (!counter
->supported
)
198 if (counter
->system_wide
)
201 for (thread
= 0; thread
< nthreads
; thread
++) {
202 for (cpu
= 0; cpu
< ncpus
; cpu
++) {
203 struct perf_counts_values
*count
;
205 count
= perf_counts(counter
->counts
, cpu
, thread
);
206 if (perf_evsel__read(counter
, cpu
, thread
, count
))
214 static void read_counters(bool close_counters
)
216 struct perf_evsel
*counter
;
218 evlist__for_each(evsel_list
, counter
) {
219 if (read_counter(counter
))
220 pr_debug("failed to read counter %s\n", counter
->name
);
222 if (perf_stat_process_counter(&stat_config
, counter
))
223 pr_warning("failed to process counter %s\n", counter
->name
);
225 if (close_counters
) {
226 perf_evsel__close_fd(counter
, perf_evsel__nr_cpus(counter
),
227 thread_map__nr(evsel_list
->threads
));
232 static void process_interval(void)
234 struct timespec ts
, rs
;
236 read_counters(false);
238 clock_gettime(CLOCK_MONOTONIC
, &ts
);
239 diff_timespec(&rs
, &ts
, &ref_time
);
241 print_counters(&rs
, 0, NULL
);
244 static void handle_initial_delay(void)
246 struct perf_evsel
*counter
;
249 const int ncpus
= cpu_map__nr(evsel_list
->cpus
),
250 nthreads
= thread_map__nr(evsel_list
->threads
);
252 usleep(initial_delay
* 1000);
253 evlist__for_each(evsel_list
, counter
)
254 perf_evsel__enable(counter
, ncpus
, nthreads
);
258 static volatile int workload_exec_errno
;
261 * perf_evlist__prepare_workload will send a SIGUSR1
262 * if the fork fails, since we asked by setting its
263 * want_signal to true.
265 static void workload_exec_failed_signal(int signo __maybe_unused
, siginfo_t
*info
,
266 void *ucontext __maybe_unused
)
268 workload_exec_errno
= info
->si_value
.sival_int
;
271 static int __run_perf_stat(int argc
, const char **argv
)
273 int interval
= stat_config
.interval
;
275 unsigned long long t0
, t1
;
276 struct perf_evsel
*counter
;
280 const bool forks
= (argc
> 0);
283 ts
.tv_sec
= interval
/ 1000;
284 ts
.tv_nsec
= (interval
% 1000) * 1000000;
291 if (perf_evlist__prepare_workload(evsel_list
, &target
, argv
, false,
292 workload_exec_failed_signal
) < 0) {
293 perror("failed to prepare workload");
296 child_pid
= evsel_list
->workload
.pid
;
300 perf_evlist__set_leader(evsel_list
);
302 evlist__for_each(evsel_list
, counter
) {
303 if (create_perf_stat_counter(counter
) < 0) {
305 * PPC returns ENXIO for HW counters until 2.6.37
306 * (behavior changed with commit b0a873e).
308 if (errno
== EINVAL
|| errno
== ENOSYS
||
309 errno
== ENOENT
|| errno
== EOPNOTSUPP
||
312 ui__warning("%s event is not supported by the kernel.\n",
313 perf_evsel__name(counter
));
314 counter
->supported
= false;
316 if ((counter
->leader
!= counter
) ||
317 !(counter
->leader
->nr_members
> 1))
321 perf_evsel__open_strerror(counter
, &target
,
322 errno
, msg
, sizeof(msg
));
323 ui__error("%s\n", msg
);
326 kill(child_pid
, SIGTERM
);
330 counter
->supported
= true;
332 l
= strlen(counter
->unit
);
337 if (perf_evlist__apply_filters(evsel_list
, &counter
)) {
338 error("failed to set filter \"%s\" on event %s with %d (%s)\n",
339 counter
->filter
, perf_evsel__name(counter
), errno
,
340 strerror_r(errno
, msg
, sizeof(msg
)));
345 * Enable counters and exec the command:
348 clock_gettime(CLOCK_MONOTONIC
, &ref_time
);
351 perf_evlist__start_workload(evsel_list
);
352 handle_initial_delay();
355 while (!waitpid(child_pid
, &status
, WNOHANG
)) {
356 nanosleep(&ts
, NULL
);
362 if (workload_exec_errno
) {
363 const char *emsg
= strerror_r(workload_exec_errno
, msg
, sizeof(msg
));
364 pr_err("Workload failed: %s\n", emsg
);
368 if (WIFSIGNALED(status
))
369 psignal(WTERMSIG(status
), argv
[0]);
371 handle_initial_delay();
373 nanosleep(&ts
, NULL
);
381 update_stats(&walltime_nsecs_stats
, t1
- t0
);
385 return WEXITSTATUS(status
);
388 static int run_perf_stat(int argc
, const char **argv
)
393 ret
= system(pre_cmd
);
401 ret
= __run_perf_stat(argc
, argv
);
406 ret
= system(post_cmd
);
414 static void print_running(u64 run
, u64 ena
)
417 fprintf(stat_config
.output
, "%s%" PRIu64
"%s%.2f",
421 ena
? 100.0 * run
/ ena
: 100.0);
422 } else if (run
!= ena
) {
423 fprintf(stat_config
.output
, " (%.2f%%)", 100.0 * run
/ ena
);
427 static void print_noise_pct(double total
, double avg
)
429 double pct
= rel_stddev_stats(total
, avg
);
432 fprintf(stat_config
.output
, "%s%.2f%%", csv_sep
, pct
);
434 fprintf(stat_config
.output
, " ( +-%6.2f%% )", pct
);
437 static void print_noise(struct perf_evsel
*evsel
, double avg
)
439 struct perf_stat_evsel
*ps
;
445 print_noise_pct(stddev_stats(&ps
->res_stats
[0]), avg
);
448 static void aggr_printout(struct perf_evsel
*evsel
, int id
, int nr
)
450 switch (stat_config
.aggr_mode
) {
452 fprintf(stat_config
.output
, "S%d-C%*d%s%*d%s",
453 cpu_map__id_to_socket(id
),
455 cpu_map__id_to_cpu(id
),
462 fprintf(stat_config
.output
, "S%*d%s%*d%s",
471 fprintf(stat_config
.output
, "CPU%*d%s",
473 perf_evsel__cpus(evsel
)->map
[id
], csv_sep
);
476 fprintf(stat_config
.output
, "%*s-%*d%s",
478 thread_map__comm(evsel
->threads
, id
),
480 thread_map__pid(evsel
->threads
, id
),
490 static void nsec_printout(int id
, int nr
, struct perf_evsel
*evsel
, double avg
)
492 FILE *output
= stat_config
.output
;
493 double msecs
= avg
/ 1e6
;
494 const char *fmt_v
, *fmt_n
;
497 fmt_v
= csv_output
? "%.6f%s" : "%18.6f%s";
498 fmt_n
= csv_output
? "%s" : "%-25s";
500 aggr_printout(evsel
, id
, nr
);
502 scnprintf(name
, sizeof(name
), "%s%s",
503 perf_evsel__name(evsel
), csv_output
? "" : " (msec)");
505 fprintf(output
, fmt_v
, msecs
, csv_sep
);
508 fprintf(output
, "%s%s", evsel
->unit
, csv_sep
);
510 fprintf(output
, "%-*s%s", unit_width
, evsel
->unit
, csv_sep
);
512 fprintf(output
, fmt_n
, name
);
515 fprintf(output
, "%s%s", csv_sep
, evsel
->cgrp
->name
);
517 if (csv_output
|| stat_config
.interval
)
520 if (perf_evsel__match(evsel
, SOFTWARE
, SW_TASK_CLOCK
))
521 fprintf(output
, " # %8.3f CPUs utilized ",
522 avg
/ avg_stats(&walltime_nsecs_stats
));
524 fprintf(output
, " ");
527 static void abs_printout(int id
, int nr
, struct perf_evsel
*evsel
, double avg
)
529 FILE *output
= stat_config
.output
;
530 double sc
= evsel
->scale
;
532 int cpu
= cpu_map__id_to_cpu(id
);
535 fmt
= sc
!= 1.0 ? "%.2f%s" : "%.0f%s";
538 fmt
= sc
!= 1.0 ? "%'18.2f%s" : "%'18.0f%s";
540 fmt
= sc
!= 1.0 ? "%18.2f%s" : "%18.0f%s";
543 aggr_printout(evsel
, id
, nr
);
545 if (stat_config
.aggr_mode
== AGGR_GLOBAL
)
548 fprintf(output
, fmt
, avg
, csv_sep
);
551 fprintf(output
, "%-*s%s",
552 csv_output
? 0 : unit_width
,
553 evsel
->unit
, csv_sep
);
555 fprintf(output
, "%-*s", csv_output
? 0 : 25, perf_evsel__name(evsel
));
558 fprintf(output
, "%s%s", csv_sep
, evsel
->cgrp
->name
);
560 if (csv_output
|| stat_config
.interval
)
563 perf_stat__print_shadow_stats(output
, evsel
, avg
, cpu
,
564 stat_config
.aggr_mode
);
567 static void print_aggr(char *prefix
)
569 FILE *output
= stat_config
.output
;
570 struct perf_evsel
*counter
;
571 int cpu
, s
, s2
, id
, nr
;
575 if (!(aggr_map
|| aggr_get_id
))
578 for (s
= 0; s
< aggr_map
->nr
; s
++) {
579 id
= aggr_map
->map
[s
];
580 evlist__for_each(evsel_list
, counter
) {
583 for (cpu
= 0; cpu
< perf_evsel__nr_cpus(counter
); cpu
++) {
584 s2
= aggr_get_id(perf_evsel__cpus(counter
), cpu
);
587 val
+= perf_counts(counter
->counts
, cpu
, 0)->val
;
588 ena
+= perf_counts(counter
->counts
, cpu
, 0)->ena
;
589 run
+= perf_counts(counter
->counts
, cpu
, 0)->run
;
593 fprintf(output
, "%s", prefix
);
595 if (run
== 0 || ena
== 0) {
596 aggr_printout(counter
, id
, nr
);
598 fprintf(output
, "%*s%s",
600 counter
->supported
? CNTR_NOT_COUNTED
: CNTR_NOT_SUPPORTED
,
603 fprintf(output
, "%-*s%s",
604 csv_output
? 0 : unit_width
,
605 counter
->unit
, csv_sep
);
607 fprintf(output
, "%*s",
608 csv_output
? 0 : -25,
609 perf_evsel__name(counter
));
612 fprintf(output
, "%s%s",
613 csv_sep
, counter
->cgrp
->name
);
615 print_running(run
, ena
);
619 uval
= val
* counter
->scale
;
621 if (nsec_counter(counter
))
622 nsec_printout(id
, nr
, counter
, uval
);
624 abs_printout(id
, nr
, counter
, uval
);
627 print_noise(counter
, 1.0);
629 print_running(run
, ena
);
635 static void print_aggr_thread(struct perf_evsel
*counter
, char *prefix
)
637 FILE *output
= stat_config
.output
;
638 int nthreads
= thread_map__nr(counter
->threads
);
639 int ncpus
= cpu_map__nr(counter
->cpus
);
643 for (thread
= 0; thread
< nthreads
; thread
++) {
644 u64 ena
= 0, run
= 0, val
= 0;
646 for (cpu
= 0; cpu
< ncpus
; cpu
++) {
647 val
+= perf_counts(counter
->counts
, cpu
, thread
)->val
;
648 ena
+= perf_counts(counter
->counts
, cpu
, thread
)->ena
;
649 run
+= perf_counts(counter
->counts
, cpu
, thread
)->run
;
653 fprintf(output
, "%s", prefix
);
655 uval
= val
* counter
->scale
;
657 if (nsec_counter(counter
))
658 nsec_printout(thread
, 0, counter
, uval
);
660 abs_printout(thread
, 0, counter
, uval
);
663 print_noise(counter
, 1.0);
665 print_running(run
, ena
);
671 * Print out the results of a single counter:
672 * aggregated counts in system-wide mode
674 static void print_counter_aggr(struct perf_evsel
*counter
, char *prefix
)
676 FILE *output
= stat_config
.output
;
677 struct perf_stat_evsel
*ps
= counter
->priv
;
678 double avg
= avg_stats(&ps
->res_stats
[0]);
679 int scaled
= counter
->counts
->scaled
;
681 double avg_enabled
, avg_running
;
683 avg_enabled
= avg_stats(&ps
->res_stats
[1]);
684 avg_running
= avg_stats(&ps
->res_stats
[2]);
687 fprintf(output
, "%s", prefix
);
689 if (scaled
== -1 || !counter
->supported
) {
690 fprintf(output
, "%*s%s",
692 counter
->supported
? CNTR_NOT_COUNTED
: CNTR_NOT_SUPPORTED
,
694 fprintf(output
, "%-*s%s",
695 csv_output
? 0 : unit_width
,
696 counter
->unit
, csv_sep
);
697 fprintf(output
, "%*s",
698 csv_output
? 0 : -25,
699 perf_evsel__name(counter
));
702 fprintf(output
, "%s%s", csv_sep
, counter
->cgrp
->name
);
704 print_running(avg_running
, avg_enabled
);
709 uval
= avg
* counter
->scale
;
711 if (nsec_counter(counter
))
712 nsec_printout(-1, 0, counter
, uval
);
714 abs_printout(-1, 0, counter
, uval
);
716 print_noise(counter
, avg
);
718 print_running(avg_running
, avg_enabled
);
719 fprintf(output
, "\n");
723 * Print out the results of a single counter:
724 * does not use aggregated count in system-wide
726 static void print_counter(struct perf_evsel
*counter
, char *prefix
)
728 FILE *output
= stat_config
.output
;
733 for (cpu
= 0; cpu
< perf_evsel__nr_cpus(counter
); cpu
++) {
734 val
= perf_counts(counter
->counts
, cpu
, 0)->val
;
735 ena
= perf_counts(counter
->counts
, cpu
, 0)->ena
;
736 run
= perf_counts(counter
->counts
, cpu
, 0)->run
;
739 fprintf(output
, "%s", prefix
);
741 if (run
== 0 || ena
== 0) {
742 fprintf(output
, "CPU%*d%s%*s%s",
744 perf_evsel__cpus(counter
)->map
[cpu
], csv_sep
,
746 counter
->supported
? CNTR_NOT_COUNTED
: CNTR_NOT_SUPPORTED
,
749 fprintf(output
, "%-*s%s",
750 csv_output
? 0 : unit_width
,
751 counter
->unit
, csv_sep
);
753 fprintf(output
, "%*s",
754 csv_output
? 0 : -25,
755 perf_evsel__name(counter
));
758 fprintf(output
, "%s%s",
759 csv_sep
, counter
->cgrp
->name
);
761 print_running(run
, ena
);
766 uval
= val
* counter
->scale
;
768 if (nsec_counter(counter
))
769 nsec_printout(cpu
, 0, counter
, uval
);
771 abs_printout(cpu
, 0, counter
, uval
);
774 print_noise(counter
, 1.0);
775 print_running(run
, ena
);
781 static void print_interval(char *prefix
, struct timespec
*ts
)
783 FILE *output
= stat_config
.output
;
784 static int num_print_interval
;
786 sprintf(prefix
, "%6lu.%09lu%s", ts
->tv_sec
, ts
->tv_nsec
, csv_sep
);
788 if (num_print_interval
== 0 && !csv_output
) {
789 switch (stat_config
.aggr_mode
) {
791 fprintf(output
, "# time socket cpus counts %*s events\n", unit_width
, "unit");
794 fprintf(output
, "# time core cpus counts %*s events\n", unit_width
, "unit");
797 fprintf(output
, "# time CPU counts %*s events\n", unit_width
, "unit");
800 fprintf(output
, "# time comm-pid counts %*s events\n", unit_width
, "unit");
804 fprintf(output
, "# time counts %*s events\n", unit_width
, "unit");
810 if (++num_print_interval
== 25)
811 num_print_interval
= 0;
814 static void print_header(int argc
, const char **argv
)
816 FILE *output
= stat_config
.output
;
822 fprintf(output
, "\n");
823 fprintf(output
, " Performance counter stats for ");
824 if (target
.system_wide
)
825 fprintf(output
, "\'system wide");
826 else if (target
.cpu_list
)
827 fprintf(output
, "\'CPU(s) %s", target
.cpu_list
);
828 else if (!target__has_task(&target
)) {
829 fprintf(output
, "\'%s", argv
[0]);
830 for (i
= 1; i
< argc
; i
++)
831 fprintf(output
, " %s", argv
[i
]);
832 } else if (target
.pid
)
833 fprintf(output
, "process id \'%s", target
.pid
);
835 fprintf(output
, "thread id \'%s", target
.tid
);
837 fprintf(output
, "\'");
839 fprintf(output
, " (%d runs)", run_count
);
840 fprintf(output
, ":\n\n");
844 static void print_footer(void)
846 FILE *output
= stat_config
.output
;
849 fprintf(output
, "\n");
850 fprintf(output
, " %17.9f seconds time elapsed",
851 avg_stats(&walltime_nsecs_stats
)/1e9
);
853 fprintf(output
, " ");
854 print_noise_pct(stddev_stats(&walltime_nsecs_stats
),
855 avg_stats(&walltime_nsecs_stats
));
857 fprintf(output
, "\n\n");
860 static void print_counters(struct timespec
*ts
, int argc
, const char **argv
)
862 int interval
= stat_config
.interval
;
863 struct perf_evsel
*counter
;
864 char buf
[64], *prefix
= NULL
;
867 print_interval(prefix
= buf
, ts
);
869 print_header(argc
, argv
);
871 switch (stat_config
.aggr_mode
) {
877 evlist__for_each(evsel_list
, counter
)
878 print_aggr_thread(counter
, prefix
);
881 evlist__for_each(evsel_list
, counter
)
882 print_counter_aggr(counter
, prefix
);
885 evlist__for_each(evsel_list
, counter
)
886 print_counter(counter
, prefix
);
893 if (!interval
&& !csv_output
)
896 fflush(stat_config
.output
);
899 static volatile int signr
= -1;
901 static void skip_signal(int signo
)
903 if ((child_pid
== -1) || stat_config
.interval
)
908 * render child_pid harmless
909 * won't send SIGTERM to a random
910 * process in case of race condition
911 * and fast PID recycling
916 static void sig_atexit(void)
921 * avoid race condition with SIGCHLD handler
922 * in skip_signal() which is modifying child_pid
923 * goal is to avoid send SIGTERM to a random
927 sigaddset(&set
, SIGCHLD
);
928 sigprocmask(SIG_BLOCK
, &set
, &oset
);
931 kill(child_pid
, SIGTERM
);
933 sigprocmask(SIG_SETMASK
, &oset
, NULL
);
938 signal(signr
, SIG_DFL
);
939 kill(getpid(), signr
);
942 static int stat__set_big_num(const struct option
*opt __maybe_unused
,
943 const char *s __maybe_unused
, int unset
)
945 big_num_opt
= unset
? 0 : 1;
949 static int perf_stat__get_socket(struct cpu_map
*map
, int cpu
)
951 return cpu_map__get_socket(map
, cpu
, NULL
);
954 static int perf_stat__get_core(struct cpu_map
*map
, int cpu
)
956 return cpu_map__get_core(map
, cpu
, NULL
);
959 static int cpu_map__get_max(struct cpu_map
*map
)
963 for (i
= 0; i
< map
->nr
; i
++) {
964 if (map
->map
[i
] > max
)
971 static struct cpu_map
*cpus_aggr_map
;
973 static int perf_stat__get_aggr(aggr_get_id_t get_id
, struct cpu_map
*map
, int idx
)
982 if (cpus_aggr_map
->map
[cpu
] == -1)
983 cpus_aggr_map
->map
[cpu
] = get_id(map
, idx
);
985 return cpus_aggr_map
->map
[cpu
];
988 static int perf_stat__get_socket_cached(struct cpu_map
*map
, int idx
)
990 return perf_stat__get_aggr(perf_stat__get_socket
, map
, idx
);
993 static int perf_stat__get_core_cached(struct cpu_map
*map
, int idx
)
995 return perf_stat__get_aggr(perf_stat__get_core
, map
, idx
);
998 static int perf_stat_init_aggr_mode(void)
1002 switch (stat_config
.aggr_mode
) {
1004 if (cpu_map__build_socket_map(evsel_list
->cpus
, &aggr_map
)) {
1005 perror("cannot build socket map");
1008 aggr_get_id
= perf_stat__get_socket_cached
;
1011 if (cpu_map__build_core_map(evsel_list
->cpus
, &aggr_map
)) {
1012 perror("cannot build core map");
1015 aggr_get_id
= perf_stat__get_core_cached
;
1026 * The evsel_list->cpus is the base we operate on,
1027 * taking the highest cpu number to be the size of
1028 * the aggregation translate cpumap.
1030 nr
= cpu_map__get_max(evsel_list
->cpus
);
1031 cpus_aggr_map
= cpu_map__empty_new(nr
+ 1);
1032 return cpus_aggr_map
? 0 : -ENOMEM
;
1036 * Add default attributes, if there were no attributes specified or
1037 * if -d/--detailed, -d -d or -d -d -d is used:
1039 static int add_default_attributes(void)
1041 struct perf_event_attr default_attrs
[] = {
1043 { .type
= PERF_TYPE_SOFTWARE
, .config
= PERF_COUNT_SW_TASK_CLOCK
},
1044 { .type
= PERF_TYPE_SOFTWARE
, .config
= PERF_COUNT_SW_CONTEXT_SWITCHES
},
1045 { .type
= PERF_TYPE_SOFTWARE
, .config
= PERF_COUNT_SW_CPU_MIGRATIONS
},
1046 { .type
= PERF_TYPE_SOFTWARE
, .config
= PERF_COUNT_SW_PAGE_FAULTS
},
1048 { .type
= PERF_TYPE_HARDWARE
, .config
= PERF_COUNT_HW_CPU_CYCLES
},
1049 { .type
= PERF_TYPE_HARDWARE
, .config
= PERF_COUNT_HW_STALLED_CYCLES_FRONTEND
},
1050 { .type
= PERF_TYPE_HARDWARE
, .config
= PERF_COUNT_HW_STALLED_CYCLES_BACKEND
},
1051 { .type
= PERF_TYPE_HARDWARE
, .config
= PERF_COUNT_HW_INSTRUCTIONS
},
1052 { .type
= PERF_TYPE_HARDWARE
, .config
= PERF_COUNT_HW_BRANCH_INSTRUCTIONS
},
1053 { .type
= PERF_TYPE_HARDWARE
, .config
= PERF_COUNT_HW_BRANCH_MISSES
},
1058 * Detailed stats (-d), covering the L1 and last level data caches:
1060 struct perf_event_attr detailed_attrs
[] = {
1062 { .type
= PERF_TYPE_HW_CACHE
,
1064 PERF_COUNT_HW_CACHE_L1D
<< 0 |
1065 (PERF_COUNT_HW_CACHE_OP_READ
<< 8) |
1066 (PERF_COUNT_HW_CACHE_RESULT_ACCESS
<< 16) },
1068 { .type
= PERF_TYPE_HW_CACHE
,
1070 PERF_COUNT_HW_CACHE_L1D
<< 0 |
1071 (PERF_COUNT_HW_CACHE_OP_READ
<< 8) |
1072 (PERF_COUNT_HW_CACHE_RESULT_MISS
<< 16) },
1074 { .type
= PERF_TYPE_HW_CACHE
,
1076 PERF_COUNT_HW_CACHE_LL
<< 0 |
1077 (PERF_COUNT_HW_CACHE_OP_READ
<< 8) |
1078 (PERF_COUNT_HW_CACHE_RESULT_ACCESS
<< 16) },
1080 { .type
= PERF_TYPE_HW_CACHE
,
1082 PERF_COUNT_HW_CACHE_LL
<< 0 |
1083 (PERF_COUNT_HW_CACHE_OP_READ
<< 8) |
1084 (PERF_COUNT_HW_CACHE_RESULT_MISS
<< 16) },
1088 * Very detailed stats (-d -d), covering the instruction cache and the TLB caches:
1090 struct perf_event_attr very_detailed_attrs
[] = {
1092 { .type
= PERF_TYPE_HW_CACHE
,
1094 PERF_COUNT_HW_CACHE_L1I
<< 0 |
1095 (PERF_COUNT_HW_CACHE_OP_READ
<< 8) |
1096 (PERF_COUNT_HW_CACHE_RESULT_ACCESS
<< 16) },
1098 { .type
= PERF_TYPE_HW_CACHE
,
1100 PERF_COUNT_HW_CACHE_L1I
<< 0 |
1101 (PERF_COUNT_HW_CACHE_OP_READ
<< 8) |
1102 (PERF_COUNT_HW_CACHE_RESULT_MISS
<< 16) },
1104 { .type
= PERF_TYPE_HW_CACHE
,
1106 PERF_COUNT_HW_CACHE_DTLB
<< 0 |
1107 (PERF_COUNT_HW_CACHE_OP_READ
<< 8) |
1108 (PERF_COUNT_HW_CACHE_RESULT_ACCESS
<< 16) },
1110 { .type
= PERF_TYPE_HW_CACHE
,
1112 PERF_COUNT_HW_CACHE_DTLB
<< 0 |
1113 (PERF_COUNT_HW_CACHE_OP_READ
<< 8) |
1114 (PERF_COUNT_HW_CACHE_RESULT_MISS
<< 16) },
1116 { .type
= PERF_TYPE_HW_CACHE
,
1118 PERF_COUNT_HW_CACHE_ITLB
<< 0 |
1119 (PERF_COUNT_HW_CACHE_OP_READ
<< 8) |
1120 (PERF_COUNT_HW_CACHE_RESULT_ACCESS
<< 16) },
1122 { .type
= PERF_TYPE_HW_CACHE
,
1124 PERF_COUNT_HW_CACHE_ITLB
<< 0 |
1125 (PERF_COUNT_HW_CACHE_OP_READ
<< 8) |
1126 (PERF_COUNT_HW_CACHE_RESULT_MISS
<< 16) },
1131 * Very, very detailed stats (-d -d -d), adding prefetch events:
1133 struct perf_event_attr very_very_detailed_attrs
[] = {
1135 { .type
= PERF_TYPE_HW_CACHE
,
1137 PERF_COUNT_HW_CACHE_L1D
<< 0 |
1138 (PERF_COUNT_HW_CACHE_OP_PREFETCH
<< 8) |
1139 (PERF_COUNT_HW_CACHE_RESULT_ACCESS
<< 16) },
1141 { .type
= PERF_TYPE_HW_CACHE
,
1143 PERF_COUNT_HW_CACHE_L1D
<< 0 |
1144 (PERF_COUNT_HW_CACHE_OP_PREFETCH
<< 8) |
1145 (PERF_COUNT_HW_CACHE_RESULT_MISS
<< 16) },
1148 /* Set attrs if no event is selected and !null_run: */
1152 if (transaction_run
) {
1154 if (pmu_have_event("cpu", "cycles-ct") &&
1155 pmu_have_event("cpu", "el-start"))
1156 err
= parse_events(evsel_list
, transaction_attrs
, NULL
);
1158 err
= parse_events(evsel_list
, transaction_limited_attrs
, NULL
);
1160 fprintf(stderr
, "Cannot set up transaction events\n");
1166 if (!evsel_list
->nr_entries
) {
1167 if (perf_evlist__add_default_attrs(evsel_list
, default_attrs
) < 0)
1171 /* Detailed events get appended to the event list: */
1173 if (detailed_run
< 1)
1176 /* Append detailed run extra attributes: */
1177 if (perf_evlist__add_default_attrs(evsel_list
, detailed_attrs
) < 0)
1180 if (detailed_run
< 2)
1183 /* Append very detailed run extra attributes: */
1184 if (perf_evlist__add_default_attrs(evsel_list
, very_detailed_attrs
) < 0)
1187 if (detailed_run
< 3)
1190 /* Append very, very detailed run extra attributes: */
1191 return perf_evlist__add_default_attrs(evsel_list
, very_very_detailed_attrs
);
1194 int cmd_stat(int argc
, const char **argv
, const char *prefix __maybe_unused
)
1196 bool append_file
= false;
1198 const char *output_name
= NULL
;
1199 const struct option options
[] = {
1200 OPT_BOOLEAN('T', "transaction", &transaction_run
,
1201 "hardware transaction statistics"),
1202 OPT_CALLBACK('e', "event", &evsel_list
, "event",
1203 "event selector. use 'perf list' to list available events",
1204 parse_events_option
),
1205 OPT_CALLBACK(0, "filter", &evsel_list
, "filter",
1206 "event filter", parse_filter
),
1207 OPT_BOOLEAN('i', "no-inherit", &no_inherit
,
1208 "child tasks do not inherit counters"),
1209 OPT_STRING('p', "pid", &target
.pid
, "pid",
1210 "stat events on existing process id"),
1211 OPT_STRING('t', "tid", &target
.tid
, "tid",
1212 "stat events on existing thread id"),
1213 OPT_BOOLEAN('a', "all-cpus", &target
.system_wide
,
1214 "system-wide collection from all CPUs"),
1215 OPT_BOOLEAN('g', "group", &group
,
1216 "put the counters into a counter group"),
1217 OPT_BOOLEAN('c', "scale", &stat_config
.scale
, "scale/normalize counters"),
1218 OPT_INCR('v', "verbose", &verbose
,
1219 "be more verbose (show counter open errors, etc)"),
1220 OPT_INTEGER('r', "repeat", &run_count
,
1221 "repeat command and print average + stddev (max: 100, forever: 0)"),
1222 OPT_BOOLEAN('n', "null", &null_run
,
1223 "null run - dont start any counters"),
1224 OPT_INCR('d', "detailed", &detailed_run
,
1225 "detailed run - start a lot of events"),
1226 OPT_BOOLEAN('S', "sync", &sync_run
,
1227 "call sync() before starting a run"),
1228 OPT_CALLBACK_NOOPT('B', "big-num", NULL
, NULL
,
1229 "print large numbers with thousands\' separators",
1231 OPT_STRING('C', "cpu", &target
.cpu_list
, "cpu",
1232 "list of cpus to monitor in system-wide"),
1233 OPT_SET_UINT('A', "no-aggr", &stat_config
.aggr_mode
,
1234 "disable CPU count aggregation", AGGR_NONE
),
1235 OPT_STRING('x', "field-separator", &csv_sep
, "separator",
1236 "print counts with custom separator"),
1237 OPT_CALLBACK('G', "cgroup", &evsel_list
, "name",
1238 "monitor event in cgroup name only", parse_cgroups
),
1239 OPT_STRING('o', "output", &output_name
, "file", "output file name"),
1240 OPT_BOOLEAN(0, "append", &append_file
, "append to the output file"),
1241 OPT_INTEGER(0, "log-fd", &output_fd
,
1242 "log output to fd, instead of stderr"),
1243 OPT_STRING(0, "pre", &pre_cmd
, "command",
1244 "command to run prior to the measured command"),
1245 OPT_STRING(0, "post", &post_cmd
, "command",
1246 "command to run after to the measured command"),
1247 OPT_UINTEGER('I', "interval-print", &stat_config
.interval
,
1248 "print counts at regular interval in ms (>= 10)"),
1249 OPT_SET_UINT(0, "per-socket", &stat_config
.aggr_mode
,
1250 "aggregate counts per processor socket", AGGR_SOCKET
),
1251 OPT_SET_UINT(0, "per-core", &stat_config
.aggr_mode
,
1252 "aggregate counts per physical processor core", AGGR_CORE
),
1253 OPT_SET_UINT(0, "per-thread", &stat_config
.aggr_mode
,
1254 "aggregate counts per thread", AGGR_THREAD
),
1255 OPT_UINTEGER('D', "delay", &initial_delay
,
1256 "ms to wait before starting measurement after program start"),
1259 const char * const stat_usage
[] = {
1260 "perf stat [<options>] [<command>]",
1263 int status
= -EINVAL
, run_idx
;
1265 FILE *output
= stderr
;
1266 unsigned int interval
;
1268 setlocale(LC_ALL
, "");
1270 evsel_list
= perf_evlist__new();
1271 if (evsel_list
== NULL
)
1274 argc
= parse_options(argc
, argv
, options
, stat_usage
,
1275 PARSE_OPT_STOP_AT_NON_OPTION
);
1277 interval
= stat_config
.interval
;
1279 if (output_name
&& strcmp(output_name
, "-"))
1282 if (output_name
&& output_fd
) {
1283 fprintf(stderr
, "cannot use both --output and --log-fd\n");
1284 parse_options_usage(stat_usage
, options
, "o", 1);
1285 parse_options_usage(NULL
, options
, "log-fd", 0);
1289 if (output_fd
< 0) {
1290 fprintf(stderr
, "argument to --log-fd must be a > 0\n");
1291 parse_options_usage(stat_usage
, options
, "log-fd", 0);
1297 mode
= append_file
? "a" : "w";
1299 output
= fopen(output_name
, mode
);
1301 perror("failed to create output file");
1304 clock_gettime(CLOCK_REALTIME
, &tm
);
1305 fprintf(output
, "# started on %s\n", ctime(&tm
.tv_sec
));
1306 } else if (output_fd
> 0) {
1307 mode
= append_file
? "a" : "w";
1308 output
= fdopen(output_fd
, mode
);
1310 perror("Failed opening logfd");
1315 stat_config
.output
= output
;
1319 if (!strcmp(csv_sep
, "\\t"))
1322 csv_sep
= DEFAULT_SEPARATOR
;
1325 * let the spreadsheet do the pretty-printing
1328 /* User explicitly passed -B? */
1329 if (big_num_opt
== 1) {
1330 fprintf(stderr
, "-B option not supported with -x\n");
1331 parse_options_usage(stat_usage
, options
, "B", 1);
1332 parse_options_usage(NULL
, options
, "x", 1);
1334 } else /* Nope, so disable big number formatting */
1336 } else if (big_num_opt
== 0) /* User passed --no-big-num */
1339 if (!argc
&& target__none(&target
))
1340 usage_with_options(stat_usage
, options
);
1342 if (run_count
< 0) {
1343 pr_err("Run count must be a positive number\n");
1344 parse_options_usage(stat_usage
, options
, "r", 1);
1346 } else if (run_count
== 0) {
1351 if ((stat_config
.aggr_mode
== AGGR_THREAD
) && !target__has_task(&target
)) {
1352 fprintf(stderr
, "The --per-thread option is only available "
1353 "when monitoring via -p -t options.\n");
1354 parse_options_usage(NULL
, options
, "p", 1);
1355 parse_options_usage(NULL
, options
, "t", 1);
1360 * no_aggr, cgroup are for system-wide only
1361 * --per-thread is aggregated per thread, we dont mix it with cpu mode
1363 if (((stat_config
.aggr_mode
!= AGGR_GLOBAL
&&
1364 stat_config
.aggr_mode
!= AGGR_THREAD
) || nr_cgroups
) &&
1365 !target__has_cpu(&target
)) {
1366 fprintf(stderr
, "both cgroup and no-aggregation "
1367 "modes only available in system-wide mode\n");
1369 parse_options_usage(stat_usage
, options
, "G", 1);
1370 parse_options_usage(NULL
, options
, "A", 1);
1371 parse_options_usage(NULL
, options
, "a", 1);
1375 if (add_default_attributes())
1378 target__validate(&target
);
1380 if (perf_evlist__create_maps(evsel_list
, &target
) < 0) {
1381 if (target__has_task(&target
)) {
1382 pr_err("Problems finding threads of monitor\n");
1383 parse_options_usage(stat_usage
, options
, "p", 1);
1384 parse_options_usage(NULL
, options
, "t", 1);
1385 } else if (target__has_cpu(&target
)) {
1386 perror("failed to parse CPUs map");
1387 parse_options_usage(stat_usage
, options
, "C", 1);
1388 parse_options_usage(NULL
, options
, "a", 1);
1394 * Initialize thread_map with comm names,
1395 * so we could print it out on output.
1397 if (stat_config
.aggr_mode
== AGGR_THREAD
)
1398 thread_map__read_comms(evsel_list
->threads
);
1400 if (interval
&& interval
< 100) {
1401 if (interval
< 10) {
1402 pr_err("print interval must be >= 10ms\n");
1403 parse_options_usage(stat_usage
, options
, "I", 1);
1406 pr_warning("print interval < 100ms. "
1407 "The overhead percentage could be high in some cases. "
1408 "Please proceed with caution.\n");
1411 if (perf_evlist__alloc_stats(evsel_list
, interval
))
1414 if (perf_stat_init_aggr_mode())
1418 * We dont want to block the signals - that would cause
1419 * child tasks to inherit that and Ctrl-C would not work.
1420 * What we want is for Ctrl-C to work in the exec()-ed
1421 * task, but being ignored by perf stat itself:
1425 signal(SIGINT
, skip_signal
);
1426 signal(SIGCHLD
, skip_signal
);
1427 signal(SIGALRM
, skip_signal
);
1428 signal(SIGABRT
, skip_signal
);
1431 for (run_idx
= 0; forever
|| run_idx
< run_count
; run_idx
++) {
1432 if (run_count
!= 1 && verbose
)
1433 fprintf(output
, "[ perf stat: executing run #%d ... ]\n",
1436 status
= run_perf_stat(argc
, argv
);
1437 if (forever
&& status
!= -1) {
1438 print_counters(NULL
, argc
, argv
);
1439 perf_stat__reset_stats();
1443 if (!forever
&& status
!= -1 && !interval
)
1444 print_counters(NULL
, argc
, argv
);
1446 perf_evlist__free_stats(evsel_list
);
1448 perf_evlist__delete(evsel_list
);