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"
63 #include <sys/prctl.h>
66 #define DEFAULT_SEPARATOR " "
67 #define CNTR_NOT_SUPPORTED "<not supported>"
68 #define CNTR_NOT_COUNTED "<not counted>"
70 static void print_counters(struct timespec
*ts
, int argc
, const char **argv
);
72 /* Default events used for perf stat -T */
73 static const char *transaction_attrs
= {
85 /* More limited version when the CPU does not have all events. */
86 static const char * transaction_limited_attrs
= {
96 static struct perf_evlist
*evsel_list
;
98 static struct target target
= {
102 static int run_count
= 1;
103 static bool no_inherit
= false;
104 static bool scale
= true;
105 static enum aggr_mode aggr_mode
= AGGR_GLOBAL
;
106 static volatile pid_t child_pid
= -1;
107 static bool null_run
= false;
108 static int detailed_run
= 0;
109 static bool transaction_run
;
110 static bool big_num
= true;
111 static int big_num_opt
= -1;
112 static const char *csv_sep
= NULL
;
113 static bool csv_output
= false;
114 static bool group
= false;
115 static FILE *output
= NULL
;
116 static const char *pre_cmd
= NULL
;
117 static const char *post_cmd
= NULL
;
118 static bool sync_run
= false;
119 static unsigned int interval
= 0;
120 static unsigned int initial_delay
= 0;
121 static unsigned int unit_width
= 4; /* strlen("unit") */
122 static bool forever
= false;
123 static struct timespec ref_time
;
124 static struct cpu_map
*aggr_map
;
125 static int (*aggr_get_id
)(struct cpu_map
*m
, int cpu
);
127 static volatile int done
= 0;
129 static inline void diff_timespec(struct timespec
*r
, struct timespec
*a
,
132 r
->tv_sec
= a
->tv_sec
- b
->tv_sec
;
133 if (a
->tv_nsec
< b
->tv_nsec
) {
134 r
->tv_nsec
= a
->tv_nsec
+ 1000000000L - b
->tv_nsec
;
137 r
->tv_nsec
= a
->tv_nsec
- b
->tv_nsec
;
141 static void perf_stat__reset_stats(void)
143 perf_evlist__reset_stats(evsel_list
);
144 perf_stat__reset_shadow_stats();
147 static int create_perf_stat_counter(struct perf_evsel
*evsel
)
149 struct perf_event_attr
*attr
= &evsel
->attr
;
152 attr
->read_format
= PERF_FORMAT_TOTAL_TIME_ENABLED
|
153 PERF_FORMAT_TOTAL_TIME_RUNNING
;
155 attr
->inherit
= !no_inherit
;
157 if (target__has_cpu(&target
))
158 return perf_evsel__open_per_cpu(evsel
, perf_evsel__cpus(evsel
));
160 if (!target__has_task(&target
) && perf_evsel__is_group_leader(evsel
)) {
163 attr
->enable_on_exec
= 1;
166 return perf_evsel__open_per_thread(evsel
, evsel_list
->threads
);
170 * Does the counter have nsecs as a unit?
172 static inline int nsec_counter(struct perf_evsel
*evsel
)
174 if (perf_evsel__match(evsel
, SOFTWARE
, SW_CPU_CLOCK
) ||
175 perf_evsel__match(evsel
, SOFTWARE
, SW_TASK_CLOCK
))
181 static void zero_per_pkg(struct perf_evsel
*counter
)
183 if (counter
->per_pkg_mask
)
184 memset(counter
->per_pkg_mask
, 0, MAX_NR_CPUS
);
187 static int check_per_pkg(struct perf_evsel
*counter
, int cpu
, bool *skip
)
189 unsigned long *mask
= counter
->per_pkg_mask
;
190 struct cpu_map
*cpus
= perf_evsel__cpus(counter
);
195 if (!counter
->per_pkg
)
198 if (cpu_map__empty(cpus
))
202 mask
= zalloc(MAX_NR_CPUS
);
206 counter
->per_pkg_mask
= mask
;
209 s
= cpu_map__get_socket(cpus
, cpu
);
213 *skip
= test_and_set_bit(s
, mask
) == 1;
218 process_counter_values(struct perf_evsel
*evsel
, int cpu
, int thread
,
219 struct perf_counts_values
*count
)
221 struct perf_counts_values
*aggr
= &evsel
->counts
->aggr
;
222 static struct perf_counts_values zero
;
225 if (check_per_pkg(evsel
, cpu
, &skip
)) {
226 pr_err("failed to read per-pkg counter\n");
238 if (!evsel
->snapshot
)
239 perf_evsel__compute_deltas(evsel
, cpu
, thread
, count
);
240 perf_counts_values__scale(count
, scale
, NULL
);
241 if (aggr_mode
== AGGR_NONE
)
242 perf_stat__update_shadow_stats(evsel
, count
->values
, cpu
);
245 aggr
->val
+= count
->val
;
247 aggr
->ena
+= count
->ena
;
248 aggr
->run
+= count
->run
;
257 static int process_counter_maps(struct perf_evsel
*counter
)
259 int nthreads
= thread_map__nr(counter
->threads
);
260 int ncpus
= perf_evsel__nr_cpus(counter
);
263 if (counter
->system_wide
)
266 for (thread
= 0; thread
< nthreads
; thread
++) {
267 for (cpu
= 0; cpu
< ncpus
; cpu
++) {
268 if (process_counter_values(counter
, cpu
, thread
,
269 perf_counts(counter
->counts
, cpu
, thread
)))
277 static int process_counter(struct perf_evsel
*counter
)
279 struct perf_counts_values
*aggr
= &counter
->counts
->aggr
;
280 struct perf_stat
*ps
= counter
->priv
;
281 u64
*count
= counter
->counts
->aggr
.values
;
284 aggr
->val
= aggr
->ena
= aggr
->run
= 0;
285 init_stats(ps
->res_stats
);
287 if (counter
->per_pkg
)
288 zero_per_pkg(counter
);
290 ret
= process_counter_maps(counter
);
294 if (aggr_mode
!= AGGR_GLOBAL
)
297 if (!counter
->snapshot
)
298 perf_evsel__compute_deltas(counter
, -1, -1, aggr
);
299 perf_counts_values__scale(aggr
, scale
, &counter
->counts
->scaled
);
301 for (i
= 0; i
< 3; i
++)
302 update_stats(&ps
->res_stats
[i
], count
[i
]);
305 fprintf(output
, "%s: %" PRIu64
" %" PRIu64
" %" PRIu64
"\n",
306 perf_evsel__name(counter
), count
[0], count
[1], count
[2]);
310 * Save the full runtime - to allow normalization during printout:
312 perf_stat__update_shadow_stats(counter
, count
, 0);
318 * Read out the results of a single counter:
319 * do not aggregate counts across CPUs in system-wide mode
321 static int read_counter(struct perf_evsel
*counter
)
323 int nthreads
= thread_map__nr(evsel_list
->threads
);
324 int ncpus
= perf_evsel__nr_cpus(counter
);
327 if (!counter
->supported
)
330 if (counter
->system_wide
)
333 for (thread
= 0; thread
< nthreads
; thread
++) {
334 for (cpu
= 0; cpu
< ncpus
; cpu
++) {
335 struct perf_counts_values
*count
;
337 count
= perf_counts(counter
->counts
, cpu
, thread
);
338 if (perf_evsel__read(counter
, cpu
, thread
, count
))
346 static void read_counters(bool close_counters
)
348 struct perf_evsel
*counter
;
350 evlist__for_each(evsel_list
, counter
) {
351 if (read_counter(counter
))
352 pr_warning("failed to read counter %s\n", counter
->name
);
354 if (process_counter(counter
))
355 pr_warning("failed to process counter %s\n", counter
->name
);
357 if (close_counters
) {
358 perf_evsel__close_fd(counter
, perf_evsel__nr_cpus(counter
),
359 thread_map__nr(evsel_list
->threads
));
364 static void process_interval(void)
366 struct timespec ts
, rs
;
368 read_counters(false);
370 clock_gettime(CLOCK_MONOTONIC
, &ts
);
371 diff_timespec(&rs
, &ts
, &ref_time
);
373 print_counters(&rs
, 0, NULL
);
376 static void handle_initial_delay(void)
378 struct perf_evsel
*counter
;
381 const int ncpus
= cpu_map__nr(evsel_list
->cpus
),
382 nthreads
= thread_map__nr(evsel_list
->threads
);
384 usleep(initial_delay
* 1000);
385 evlist__for_each(evsel_list
, counter
)
386 perf_evsel__enable(counter
, ncpus
, nthreads
);
390 static volatile int workload_exec_errno
;
393 * perf_evlist__prepare_workload will send a SIGUSR1
394 * if the fork fails, since we asked by setting its
395 * want_signal to true.
397 static void workload_exec_failed_signal(int signo __maybe_unused
, siginfo_t
*info
,
398 void *ucontext __maybe_unused
)
400 workload_exec_errno
= info
->si_value
.sival_int
;
403 static int __run_perf_stat(int argc
, const char **argv
)
406 unsigned long long t0
, t1
;
407 struct perf_evsel
*counter
;
411 const bool forks
= (argc
> 0);
414 ts
.tv_sec
= interval
/ 1000;
415 ts
.tv_nsec
= (interval
% 1000) * 1000000;
422 if (perf_evlist__prepare_workload(evsel_list
, &target
, argv
, false,
423 workload_exec_failed_signal
) < 0) {
424 perror("failed to prepare workload");
427 child_pid
= evsel_list
->workload
.pid
;
431 perf_evlist__set_leader(evsel_list
);
433 evlist__for_each(evsel_list
, counter
) {
434 if (create_perf_stat_counter(counter
) < 0) {
436 * PPC returns ENXIO for HW counters until 2.6.37
437 * (behavior changed with commit b0a873e).
439 if (errno
== EINVAL
|| errno
== ENOSYS
||
440 errno
== ENOENT
|| errno
== EOPNOTSUPP
||
443 ui__warning("%s event is not supported by the kernel.\n",
444 perf_evsel__name(counter
));
445 counter
->supported
= false;
447 if ((counter
->leader
!= counter
) ||
448 !(counter
->leader
->nr_members
> 1))
452 perf_evsel__open_strerror(counter
, &target
,
453 errno
, msg
, sizeof(msg
));
454 ui__error("%s\n", msg
);
457 kill(child_pid
, SIGTERM
);
461 counter
->supported
= true;
463 l
= strlen(counter
->unit
);
468 if (perf_evlist__apply_filters(evsel_list
, &counter
)) {
469 error("failed to set filter \"%s\" on event %s with %d (%s)\n",
470 counter
->filter
, perf_evsel__name(counter
), errno
,
471 strerror_r(errno
, msg
, sizeof(msg
)));
476 * Enable counters and exec the command:
479 clock_gettime(CLOCK_MONOTONIC
, &ref_time
);
482 perf_evlist__start_workload(evsel_list
);
483 handle_initial_delay();
486 while (!waitpid(child_pid
, &status
, WNOHANG
)) {
487 nanosleep(&ts
, NULL
);
493 if (workload_exec_errno
) {
494 const char *emsg
= strerror_r(workload_exec_errno
, msg
, sizeof(msg
));
495 pr_err("Workload failed: %s\n", emsg
);
499 if (WIFSIGNALED(status
))
500 psignal(WTERMSIG(status
), argv
[0]);
502 handle_initial_delay();
504 nanosleep(&ts
, NULL
);
512 update_stats(&walltime_nsecs_stats
, t1
- t0
);
516 return WEXITSTATUS(status
);
519 static int run_perf_stat(int argc
, const char **argv
)
524 ret
= system(pre_cmd
);
532 ret
= __run_perf_stat(argc
, argv
);
537 ret
= system(post_cmd
);
545 static void print_running(u64 run
, u64 ena
)
548 fprintf(output
, "%s%" PRIu64
"%s%.2f",
552 ena
? 100.0 * run
/ ena
: 100.0);
553 } else if (run
!= ena
) {
554 fprintf(output
, " (%.2f%%)", 100.0 * run
/ ena
);
558 static void print_noise_pct(double total
, double avg
)
560 double pct
= rel_stddev_stats(total
, avg
);
563 fprintf(output
, "%s%.2f%%", csv_sep
, pct
);
565 fprintf(output
, " ( +-%6.2f%% )", pct
);
568 static void print_noise(struct perf_evsel
*evsel
, double avg
)
570 struct perf_stat
*ps
;
576 print_noise_pct(stddev_stats(&ps
->res_stats
[0]), avg
);
579 static void aggr_printout(struct perf_evsel
*evsel
, int id
, int nr
)
583 fprintf(output
, "S%d-C%*d%s%*d%s",
584 cpu_map__id_to_socket(id
),
586 cpu_map__id_to_cpu(id
),
593 fprintf(output
, "S%*d%s%*d%s",
602 fprintf(output
, "CPU%*d%s",
604 perf_evsel__cpus(evsel
)->map
[id
], csv_sep
);
607 fprintf(output
, "%*s-%*d%s",
609 thread_map__comm(evsel
->threads
, id
),
611 thread_map__pid(evsel
->threads
, id
),
620 static void nsec_printout(int id
, int nr
, struct perf_evsel
*evsel
, double avg
)
622 double msecs
= avg
/ 1e6
;
623 const char *fmt_v
, *fmt_n
;
626 fmt_v
= csv_output
? "%.6f%s" : "%18.6f%s";
627 fmt_n
= csv_output
? "%s" : "%-25s";
629 aggr_printout(evsel
, id
, nr
);
631 scnprintf(name
, sizeof(name
), "%s%s",
632 perf_evsel__name(evsel
), csv_output
? "" : " (msec)");
634 fprintf(output
, fmt_v
, msecs
, csv_sep
);
637 fprintf(output
, "%s%s", evsel
->unit
, csv_sep
);
639 fprintf(output
, "%-*s%s", unit_width
, evsel
->unit
, csv_sep
);
641 fprintf(output
, fmt_n
, name
);
644 fprintf(output
, "%s%s", csv_sep
, evsel
->cgrp
->name
);
646 if (csv_output
|| interval
)
649 if (perf_evsel__match(evsel
, SOFTWARE
, SW_TASK_CLOCK
))
650 fprintf(output
, " # %8.3f CPUs utilized ",
651 avg
/ avg_stats(&walltime_nsecs_stats
));
653 fprintf(output
, " ");
656 static void abs_printout(int id
, int nr
, struct perf_evsel
*evsel
, double avg
)
658 double sc
= evsel
->scale
;
660 int cpu
= cpu_map__id_to_cpu(id
);
663 fmt
= sc
!= 1.0 ? "%.2f%s" : "%.0f%s";
666 fmt
= sc
!= 1.0 ? "%'18.2f%s" : "%'18.0f%s";
668 fmt
= sc
!= 1.0 ? "%18.2f%s" : "%18.0f%s";
671 aggr_printout(evsel
, id
, nr
);
673 if (aggr_mode
== AGGR_GLOBAL
)
676 fprintf(output
, fmt
, avg
, csv_sep
);
679 fprintf(output
, "%-*s%s",
680 csv_output
? 0 : unit_width
,
681 evsel
->unit
, csv_sep
);
683 fprintf(output
, "%-*s", csv_output
? 0 : 25, perf_evsel__name(evsel
));
686 fprintf(output
, "%s%s", csv_sep
, evsel
->cgrp
->name
);
688 if (csv_output
|| interval
)
691 perf_stat__print_shadow_stats(output
, evsel
, avg
, cpu
, aggr_mode
);
694 static void print_aggr(char *prefix
)
696 struct perf_evsel
*counter
;
697 int cpu
, cpu2
, s
, s2
, id
, nr
;
701 if (!(aggr_map
|| aggr_get_id
))
704 for (s
= 0; s
< aggr_map
->nr
; s
++) {
705 id
= aggr_map
->map
[s
];
706 evlist__for_each(evsel_list
, counter
) {
709 for (cpu
= 0; cpu
< perf_evsel__nr_cpus(counter
); cpu
++) {
710 cpu2
= perf_evsel__cpus(counter
)->map
[cpu
];
711 s2
= aggr_get_id(evsel_list
->cpus
, cpu2
);
714 val
+= perf_counts(counter
->counts
, cpu
, 0)->val
;
715 ena
+= perf_counts(counter
->counts
, cpu
, 0)->ena
;
716 run
+= perf_counts(counter
->counts
, cpu
, 0)->run
;
720 fprintf(output
, "%s", prefix
);
722 if (run
== 0 || ena
== 0) {
723 aggr_printout(counter
, id
, nr
);
725 fprintf(output
, "%*s%s",
727 counter
->supported
? CNTR_NOT_COUNTED
: CNTR_NOT_SUPPORTED
,
730 fprintf(output
, "%-*s%s",
731 csv_output
? 0 : unit_width
,
732 counter
->unit
, csv_sep
);
734 fprintf(output
, "%*s",
735 csv_output
? 0 : -25,
736 perf_evsel__name(counter
));
739 fprintf(output
, "%s%s",
740 csv_sep
, counter
->cgrp
->name
);
742 print_running(run
, ena
);
746 uval
= val
* counter
->scale
;
748 if (nsec_counter(counter
))
749 nsec_printout(id
, nr
, counter
, uval
);
751 abs_printout(id
, nr
, counter
, uval
);
754 print_noise(counter
, 1.0);
756 print_running(run
, ena
);
762 static void print_aggr_thread(struct perf_evsel
*counter
, char *prefix
)
764 int nthreads
= thread_map__nr(counter
->threads
);
765 int ncpus
= cpu_map__nr(counter
->cpus
);
769 for (thread
= 0; thread
< nthreads
; thread
++) {
770 u64 ena
= 0, run
= 0, val
= 0;
772 for (cpu
= 0; cpu
< ncpus
; cpu
++) {
773 val
+= perf_counts(counter
->counts
, cpu
, thread
)->val
;
774 ena
+= perf_counts(counter
->counts
, cpu
, thread
)->ena
;
775 run
+= perf_counts(counter
->counts
, cpu
, thread
)->run
;
779 fprintf(output
, "%s", prefix
);
781 uval
= val
* counter
->scale
;
783 if (nsec_counter(counter
))
784 nsec_printout(thread
, 0, counter
, uval
);
786 abs_printout(thread
, 0, counter
, uval
);
789 print_noise(counter
, 1.0);
791 print_running(run
, ena
);
797 * Print out the results of a single counter:
798 * aggregated counts in system-wide mode
800 static void print_counter_aggr(struct perf_evsel
*counter
, char *prefix
)
802 struct perf_stat
*ps
= counter
->priv
;
803 double avg
= avg_stats(&ps
->res_stats
[0]);
804 int scaled
= counter
->counts
->scaled
;
806 double avg_enabled
, avg_running
;
808 avg_enabled
= avg_stats(&ps
->res_stats
[1]);
809 avg_running
= avg_stats(&ps
->res_stats
[2]);
812 fprintf(output
, "%s", prefix
);
814 if (scaled
== -1 || !counter
->supported
) {
815 fprintf(output
, "%*s%s",
817 counter
->supported
? CNTR_NOT_COUNTED
: CNTR_NOT_SUPPORTED
,
819 fprintf(output
, "%-*s%s",
820 csv_output
? 0 : unit_width
,
821 counter
->unit
, csv_sep
);
822 fprintf(output
, "%*s",
823 csv_output
? 0 : -25,
824 perf_evsel__name(counter
));
827 fprintf(output
, "%s%s", csv_sep
, counter
->cgrp
->name
);
829 print_running(avg_running
, avg_enabled
);
834 uval
= avg
* counter
->scale
;
836 if (nsec_counter(counter
))
837 nsec_printout(-1, 0, counter
, uval
);
839 abs_printout(-1, 0, counter
, uval
);
841 print_noise(counter
, avg
);
843 print_running(avg_running
, avg_enabled
);
844 fprintf(output
, "\n");
848 * Print out the results of a single counter:
849 * does not use aggregated count in system-wide
851 static void print_counter(struct perf_evsel
*counter
, char *prefix
)
857 for (cpu
= 0; cpu
< perf_evsel__nr_cpus(counter
); cpu
++) {
858 val
= perf_counts(counter
->counts
, cpu
, 0)->val
;
859 ena
= perf_counts(counter
->counts
, cpu
, 0)->ena
;
860 run
= perf_counts(counter
->counts
, cpu
, 0)->run
;
863 fprintf(output
, "%s", prefix
);
865 if (run
== 0 || ena
== 0) {
866 fprintf(output
, "CPU%*d%s%*s%s",
868 perf_evsel__cpus(counter
)->map
[cpu
], csv_sep
,
870 counter
->supported
? CNTR_NOT_COUNTED
: CNTR_NOT_SUPPORTED
,
873 fprintf(output
, "%-*s%s",
874 csv_output
? 0 : unit_width
,
875 counter
->unit
, csv_sep
);
877 fprintf(output
, "%*s",
878 csv_output
? 0 : -25,
879 perf_evsel__name(counter
));
882 fprintf(output
, "%s%s",
883 csv_sep
, counter
->cgrp
->name
);
885 print_running(run
, ena
);
890 uval
= val
* counter
->scale
;
892 if (nsec_counter(counter
))
893 nsec_printout(cpu
, 0, counter
, uval
);
895 abs_printout(cpu
, 0, counter
, uval
);
898 print_noise(counter
, 1.0);
899 print_running(run
, ena
);
905 static void print_interval(char *prefix
, struct timespec
*ts
)
907 static int num_print_interval
;
909 sprintf(prefix
, "%6lu.%09lu%s", ts
->tv_sec
, ts
->tv_nsec
, csv_sep
);
911 if (num_print_interval
== 0 && !csv_output
) {
914 fprintf(output
, "# time socket cpus counts %*s events\n", unit_width
, "unit");
917 fprintf(output
, "# time core cpus counts %*s events\n", unit_width
, "unit");
920 fprintf(output
, "# time CPU counts %*s events\n", unit_width
, "unit");
923 fprintf(output
, "# time comm-pid counts %*s events\n", unit_width
, "unit");
927 fprintf(output
, "# time counts %*s events\n", unit_width
, "unit");
931 if (++num_print_interval
== 25)
932 num_print_interval
= 0;
935 static void print_header(int argc
, const char **argv
)
942 fprintf(output
, "\n");
943 fprintf(output
, " Performance counter stats for ");
944 if (target
.system_wide
)
945 fprintf(output
, "\'system wide");
946 else if (target
.cpu_list
)
947 fprintf(output
, "\'CPU(s) %s", target
.cpu_list
);
948 else if (!target__has_task(&target
)) {
949 fprintf(output
, "\'%s", argv
[0]);
950 for (i
= 1; i
< argc
; i
++)
951 fprintf(output
, " %s", argv
[i
]);
952 } else if (target
.pid
)
953 fprintf(output
, "process id \'%s", target
.pid
);
955 fprintf(output
, "thread id \'%s", target
.tid
);
957 fprintf(output
, "\'");
959 fprintf(output
, " (%d runs)", run_count
);
960 fprintf(output
, ":\n\n");
964 static void print_footer(void)
967 fprintf(output
, "\n");
968 fprintf(output
, " %17.9f seconds time elapsed",
969 avg_stats(&walltime_nsecs_stats
)/1e9
);
971 fprintf(output
, " ");
972 print_noise_pct(stddev_stats(&walltime_nsecs_stats
),
973 avg_stats(&walltime_nsecs_stats
));
975 fprintf(output
, "\n\n");
978 static void print_counters(struct timespec
*ts
, int argc
, const char **argv
)
980 struct perf_evsel
*counter
;
981 char buf
[64], *prefix
= NULL
;
984 print_interval(prefix
= buf
, ts
);
986 print_header(argc
, argv
);
994 evlist__for_each(evsel_list
, counter
)
995 print_aggr_thread(counter
, prefix
);
998 evlist__for_each(evsel_list
, counter
)
999 print_counter_aggr(counter
, prefix
);
1002 evlist__for_each(evsel_list
, counter
)
1003 print_counter(counter
, prefix
);
1009 if (!interval
&& !csv_output
)
1015 static volatile int signr
= -1;
1017 static void skip_signal(int signo
)
1019 if ((child_pid
== -1) || interval
)
1024 * render child_pid harmless
1025 * won't send SIGTERM to a random
1026 * process in case of race condition
1027 * and fast PID recycling
1032 static void sig_atexit(void)
1037 * avoid race condition with SIGCHLD handler
1038 * in skip_signal() which is modifying child_pid
1039 * goal is to avoid send SIGTERM to a random
1043 sigaddset(&set
, SIGCHLD
);
1044 sigprocmask(SIG_BLOCK
, &set
, &oset
);
1046 if (child_pid
!= -1)
1047 kill(child_pid
, SIGTERM
);
1049 sigprocmask(SIG_SETMASK
, &oset
, NULL
);
1054 signal(signr
, SIG_DFL
);
1055 kill(getpid(), signr
);
1058 static int stat__set_big_num(const struct option
*opt __maybe_unused
,
1059 const char *s __maybe_unused
, int unset
)
1061 big_num_opt
= unset
? 0 : 1;
1065 static int perf_stat_init_aggr_mode(void)
1067 switch (aggr_mode
) {
1069 if (cpu_map__build_socket_map(evsel_list
->cpus
, &aggr_map
)) {
1070 perror("cannot build socket map");
1073 aggr_get_id
= cpu_map__get_socket
;
1076 if (cpu_map__build_core_map(evsel_list
->cpus
, &aggr_map
)) {
1077 perror("cannot build core map");
1080 aggr_get_id
= cpu_map__get_core
;
1092 * Add default attributes, if there were no attributes specified or
1093 * if -d/--detailed, -d -d or -d -d -d is used:
1095 static int add_default_attributes(void)
1097 struct perf_event_attr default_attrs
[] = {
1099 { .type
= PERF_TYPE_SOFTWARE
, .config
= PERF_COUNT_SW_TASK_CLOCK
},
1100 { .type
= PERF_TYPE_SOFTWARE
, .config
= PERF_COUNT_SW_CONTEXT_SWITCHES
},
1101 { .type
= PERF_TYPE_SOFTWARE
, .config
= PERF_COUNT_SW_CPU_MIGRATIONS
},
1102 { .type
= PERF_TYPE_SOFTWARE
, .config
= PERF_COUNT_SW_PAGE_FAULTS
},
1104 { .type
= PERF_TYPE_HARDWARE
, .config
= PERF_COUNT_HW_CPU_CYCLES
},
1105 { .type
= PERF_TYPE_HARDWARE
, .config
= PERF_COUNT_HW_STALLED_CYCLES_FRONTEND
},
1106 { .type
= PERF_TYPE_HARDWARE
, .config
= PERF_COUNT_HW_STALLED_CYCLES_BACKEND
},
1107 { .type
= PERF_TYPE_HARDWARE
, .config
= PERF_COUNT_HW_INSTRUCTIONS
},
1108 { .type
= PERF_TYPE_HARDWARE
, .config
= PERF_COUNT_HW_BRANCH_INSTRUCTIONS
},
1109 { .type
= PERF_TYPE_HARDWARE
, .config
= PERF_COUNT_HW_BRANCH_MISSES
},
1114 * Detailed stats (-d), covering the L1 and last level data caches:
1116 struct perf_event_attr detailed_attrs
[] = {
1118 { .type
= PERF_TYPE_HW_CACHE
,
1120 PERF_COUNT_HW_CACHE_L1D
<< 0 |
1121 (PERF_COUNT_HW_CACHE_OP_READ
<< 8) |
1122 (PERF_COUNT_HW_CACHE_RESULT_ACCESS
<< 16) },
1124 { .type
= PERF_TYPE_HW_CACHE
,
1126 PERF_COUNT_HW_CACHE_L1D
<< 0 |
1127 (PERF_COUNT_HW_CACHE_OP_READ
<< 8) |
1128 (PERF_COUNT_HW_CACHE_RESULT_MISS
<< 16) },
1130 { .type
= PERF_TYPE_HW_CACHE
,
1132 PERF_COUNT_HW_CACHE_LL
<< 0 |
1133 (PERF_COUNT_HW_CACHE_OP_READ
<< 8) |
1134 (PERF_COUNT_HW_CACHE_RESULT_ACCESS
<< 16) },
1136 { .type
= PERF_TYPE_HW_CACHE
,
1138 PERF_COUNT_HW_CACHE_LL
<< 0 |
1139 (PERF_COUNT_HW_CACHE_OP_READ
<< 8) |
1140 (PERF_COUNT_HW_CACHE_RESULT_MISS
<< 16) },
1144 * Very detailed stats (-d -d), covering the instruction cache and the TLB caches:
1146 struct perf_event_attr very_detailed_attrs
[] = {
1148 { .type
= PERF_TYPE_HW_CACHE
,
1150 PERF_COUNT_HW_CACHE_L1I
<< 0 |
1151 (PERF_COUNT_HW_CACHE_OP_READ
<< 8) |
1152 (PERF_COUNT_HW_CACHE_RESULT_ACCESS
<< 16) },
1154 { .type
= PERF_TYPE_HW_CACHE
,
1156 PERF_COUNT_HW_CACHE_L1I
<< 0 |
1157 (PERF_COUNT_HW_CACHE_OP_READ
<< 8) |
1158 (PERF_COUNT_HW_CACHE_RESULT_MISS
<< 16) },
1160 { .type
= PERF_TYPE_HW_CACHE
,
1162 PERF_COUNT_HW_CACHE_DTLB
<< 0 |
1163 (PERF_COUNT_HW_CACHE_OP_READ
<< 8) |
1164 (PERF_COUNT_HW_CACHE_RESULT_ACCESS
<< 16) },
1166 { .type
= PERF_TYPE_HW_CACHE
,
1168 PERF_COUNT_HW_CACHE_DTLB
<< 0 |
1169 (PERF_COUNT_HW_CACHE_OP_READ
<< 8) |
1170 (PERF_COUNT_HW_CACHE_RESULT_MISS
<< 16) },
1172 { .type
= PERF_TYPE_HW_CACHE
,
1174 PERF_COUNT_HW_CACHE_ITLB
<< 0 |
1175 (PERF_COUNT_HW_CACHE_OP_READ
<< 8) |
1176 (PERF_COUNT_HW_CACHE_RESULT_ACCESS
<< 16) },
1178 { .type
= PERF_TYPE_HW_CACHE
,
1180 PERF_COUNT_HW_CACHE_ITLB
<< 0 |
1181 (PERF_COUNT_HW_CACHE_OP_READ
<< 8) |
1182 (PERF_COUNT_HW_CACHE_RESULT_MISS
<< 16) },
1187 * Very, very detailed stats (-d -d -d), adding prefetch events:
1189 struct perf_event_attr very_very_detailed_attrs
[] = {
1191 { .type
= PERF_TYPE_HW_CACHE
,
1193 PERF_COUNT_HW_CACHE_L1D
<< 0 |
1194 (PERF_COUNT_HW_CACHE_OP_PREFETCH
<< 8) |
1195 (PERF_COUNT_HW_CACHE_RESULT_ACCESS
<< 16) },
1197 { .type
= PERF_TYPE_HW_CACHE
,
1199 PERF_COUNT_HW_CACHE_L1D
<< 0 |
1200 (PERF_COUNT_HW_CACHE_OP_PREFETCH
<< 8) |
1201 (PERF_COUNT_HW_CACHE_RESULT_MISS
<< 16) },
1204 /* Set attrs if no event is selected and !null_run: */
1208 if (transaction_run
) {
1210 if (pmu_have_event("cpu", "cycles-ct") &&
1211 pmu_have_event("cpu", "el-start"))
1212 err
= parse_events(evsel_list
, transaction_attrs
, NULL
);
1214 err
= parse_events(evsel_list
, transaction_limited_attrs
, NULL
);
1216 fprintf(stderr
, "Cannot set up transaction events\n");
1222 if (!evsel_list
->nr_entries
) {
1223 if (perf_evlist__add_default_attrs(evsel_list
, default_attrs
) < 0)
1227 /* Detailed events get appended to the event list: */
1229 if (detailed_run
< 1)
1232 /* Append detailed run extra attributes: */
1233 if (perf_evlist__add_default_attrs(evsel_list
, detailed_attrs
) < 0)
1236 if (detailed_run
< 2)
1239 /* Append very detailed run extra attributes: */
1240 if (perf_evlist__add_default_attrs(evsel_list
, very_detailed_attrs
) < 0)
1243 if (detailed_run
< 3)
1246 /* Append very, very detailed run extra attributes: */
1247 return perf_evlist__add_default_attrs(evsel_list
, very_very_detailed_attrs
);
1250 int cmd_stat(int argc
, const char **argv
, const char *prefix __maybe_unused
)
1252 bool append_file
= false;
1254 const char *output_name
= NULL
;
1255 const struct option options
[] = {
1256 OPT_BOOLEAN('T', "transaction", &transaction_run
,
1257 "hardware transaction statistics"),
1258 OPT_CALLBACK('e', "event", &evsel_list
, "event",
1259 "event selector. use 'perf list' to list available events",
1260 parse_events_option
),
1261 OPT_CALLBACK(0, "filter", &evsel_list
, "filter",
1262 "event filter", parse_filter
),
1263 OPT_BOOLEAN('i', "no-inherit", &no_inherit
,
1264 "child tasks do not inherit counters"),
1265 OPT_STRING('p', "pid", &target
.pid
, "pid",
1266 "stat events on existing process id"),
1267 OPT_STRING('t', "tid", &target
.tid
, "tid",
1268 "stat events on existing thread id"),
1269 OPT_BOOLEAN('a', "all-cpus", &target
.system_wide
,
1270 "system-wide collection from all CPUs"),
1271 OPT_BOOLEAN('g', "group", &group
,
1272 "put the counters into a counter group"),
1273 OPT_BOOLEAN('c', "scale", &scale
, "scale/normalize counters"),
1274 OPT_INCR('v', "verbose", &verbose
,
1275 "be more verbose (show counter open errors, etc)"),
1276 OPT_INTEGER('r', "repeat", &run_count
,
1277 "repeat command and print average + stddev (max: 100, forever: 0)"),
1278 OPT_BOOLEAN('n', "null", &null_run
,
1279 "null run - dont start any counters"),
1280 OPT_INCR('d', "detailed", &detailed_run
,
1281 "detailed run - start a lot of events"),
1282 OPT_BOOLEAN('S', "sync", &sync_run
,
1283 "call sync() before starting a run"),
1284 OPT_CALLBACK_NOOPT('B', "big-num", NULL
, NULL
,
1285 "print large numbers with thousands\' separators",
1287 OPT_STRING('C', "cpu", &target
.cpu_list
, "cpu",
1288 "list of cpus to monitor in system-wide"),
1289 OPT_SET_UINT('A', "no-aggr", &aggr_mode
,
1290 "disable CPU count aggregation", AGGR_NONE
),
1291 OPT_STRING('x', "field-separator", &csv_sep
, "separator",
1292 "print counts with custom separator"),
1293 OPT_CALLBACK('G', "cgroup", &evsel_list
, "name",
1294 "monitor event in cgroup name only", parse_cgroups
),
1295 OPT_STRING('o', "output", &output_name
, "file", "output file name"),
1296 OPT_BOOLEAN(0, "append", &append_file
, "append to the output file"),
1297 OPT_INTEGER(0, "log-fd", &output_fd
,
1298 "log output to fd, instead of stderr"),
1299 OPT_STRING(0, "pre", &pre_cmd
, "command",
1300 "command to run prior to the measured command"),
1301 OPT_STRING(0, "post", &post_cmd
, "command",
1302 "command to run after to the measured command"),
1303 OPT_UINTEGER('I', "interval-print", &interval
,
1304 "print counts at regular interval in ms (>= 100)"),
1305 OPT_SET_UINT(0, "per-socket", &aggr_mode
,
1306 "aggregate counts per processor socket", AGGR_SOCKET
),
1307 OPT_SET_UINT(0, "per-core", &aggr_mode
,
1308 "aggregate counts per physical processor core", AGGR_CORE
),
1309 OPT_SET_UINT(0, "per-thread", &aggr_mode
,
1310 "aggregate counts per thread", AGGR_THREAD
),
1311 OPT_UINTEGER('D', "delay", &initial_delay
,
1312 "ms to wait before starting measurement after program start"),
1315 const char * const stat_usage
[] = {
1316 "perf stat [<options>] [<command>]",
1319 int status
= -EINVAL
, run_idx
;
1322 setlocale(LC_ALL
, "");
1324 evsel_list
= perf_evlist__new();
1325 if (evsel_list
== NULL
)
1328 argc
= parse_options(argc
, argv
, options
, stat_usage
,
1329 PARSE_OPT_STOP_AT_NON_OPTION
);
1332 if (output_name
&& strcmp(output_name
, "-"))
1335 if (output_name
&& output_fd
) {
1336 fprintf(stderr
, "cannot use both --output and --log-fd\n");
1337 parse_options_usage(stat_usage
, options
, "o", 1);
1338 parse_options_usage(NULL
, options
, "log-fd", 0);
1342 if (output_fd
< 0) {
1343 fprintf(stderr
, "argument to --log-fd must be a > 0\n");
1344 parse_options_usage(stat_usage
, options
, "log-fd", 0);
1350 mode
= append_file
? "a" : "w";
1352 output
= fopen(output_name
, mode
);
1354 perror("failed to create output file");
1357 clock_gettime(CLOCK_REALTIME
, &tm
);
1358 fprintf(output
, "# started on %s\n", ctime(&tm
.tv_sec
));
1359 } else if (output_fd
> 0) {
1360 mode
= append_file
? "a" : "w";
1361 output
= fdopen(output_fd
, mode
);
1363 perror("Failed opening logfd");
1370 if (!strcmp(csv_sep
, "\\t"))
1373 csv_sep
= DEFAULT_SEPARATOR
;
1376 * let the spreadsheet do the pretty-printing
1379 /* User explicitly passed -B? */
1380 if (big_num_opt
== 1) {
1381 fprintf(stderr
, "-B option not supported with -x\n");
1382 parse_options_usage(stat_usage
, options
, "B", 1);
1383 parse_options_usage(NULL
, options
, "x", 1);
1385 } else /* Nope, so disable big number formatting */
1387 } else if (big_num_opt
== 0) /* User passed --no-big-num */
1390 if (!argc
&& target__none(&target
))
1391 usage_with_options(stat_usage
, options
);
1393 if (run_count
< 0) {
1394 pr_err("Run count must be a positive number\n");
1395 parse_options_usage(stat_usage
, options
, "r", 1);
1397 } else if (run_count
== 0) {
1402 if ((aggr_mode
== AGGR_THREAD
) && !target__has_task(&target
)) {
1403 fprintf(stderr
, "The --per-thread option is only available "
1404 "when monitoring via -p -t options.\n");
1405 parse_options_usage(NULL
, options
, "p", 1);
1406 parse_options_usage(NULL
, options
, "t", 1);
1411 * no_aggr, cgroup are for system-wide only
1412 * --per-thread is aggregated per thread, we dont mix it with cpu mode
1414 if (((aggr_mode
!= AGGR_GLOBAL
&& aggr_mode
!= AGGR_THREAD
) || nr_cgroups
) &&
1415 !target__has_cpu(&target
)) {
1416 fprintf(stderr
, "both cgroup and no-aggregation "
1417 "modes only available in system-wide mode\n");
1419 parse_options_usage(stat_usage
, options
, "G", 1);
1420 parse_options_usage(NULL
, options
, "A", 1);
1421 parse_options_usage(NULL
, options
, "a", 1);
1425 if (add_default_attributes())
1428 target__validate(&target
);
1430 if (perf_evlist__create_maps(evsel_list
, &target
) < 0) {
1431 if (target__has_task(&target
)) {
1432 pr_err("Problems finding threads of monitor\n");
1433 parse_options_usage(stat_usage
, options
, "p", 1);
1434 parse_options_usage(NULL
, options
, "t", 1);
1435 } else if (target__has_cpu(&target
)) {
1436 perror("failed to parse CPUs map");
1437 parse_options_usage(stat_usage
, options
, "C", 1);
1438 parse_options_usage(NULL
, options
, "a", 1);
1444 * Initialize thread_map with comm names,
1445 * so we could print it out on output.
1447 if (aggr_mode
== AGGR_THREAD
)
1448 thread_map__read_comms(evsel_list
->threads
);
1450 if (interval
&& interval
< 100) {
1451 pr_err("print interval must be >= 100ms\n");
1452 parse_options_usage(stat_usage
, options
, "I", 1);
1456 if (perf_evlist__alloc_stats(evsel_list
, interval
))
1459 if (perf_stat_init_aggr_mode())
1463 * We dont want to block the signals - that would cause
1464 * child tasks to inherit that and Ctrl-C would not work.
1465 * What we want is for Ctrl-C to work in the exec()-ed
1466 * task, but being ignored by perf stat itself:
1470 signal(SIGINT
, skip_signal
);
1471 signal(SIGCHLD
, skip_signal
);
1472 signal(SIGALRM
, skip_signal
);
1473 signal(SIGABRT
, skip_signal
);
1476 for (run_idx
= 0; forever
|| run_idx
< run_count
; run_idx
++) {
1477 if (run_count
!= 1 && verbose
)
1478 fprintf(output
, "[ perf stat: executing run #%d ... ]\n",
1481 status
= run_perf_stat(argc
, argv
);
1482 if (forever
&& status
!= -1) {
1483 print_counters(NULL
, argc
, argv
);
1484 perf_stat__reset_stats();
1488 if (!forever
&& status
!= -1 && !interval
)
1489 print_counters(NULL
, argc
, argv
);
1491 perf_evlist__free_stats(evsel_list
);
1493 perf_evlist__delete(evsel_list
);