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_stat(int argc
, const char **argv
);
71 static void print_counter_aggr(struct perf_evsel
*counter
, char *prefix
);
72 static void print_counter(struct perf_evsel
*counter
, char *prefix
);
73 static void print_aggr(char *prefix
);
75 /* Default events used for perf stat -T */
76 static const char *transaction_attrs
= {
88 /* More limited version when the CPU does not have all events. */
89 static const char * transaction_limited_attrs
= {
99 static struct perf_evlist
*evsel_list
;
101 static struct target target
= {
105 static int run_count
= 1;
106 static bool no_inherit
= false;
107 static bool scale
= true;
108 static enum aggr_mode aggr_mode
= AGGR_GLOBAL
;
109 static volatile pid_t child_pid
= -1;
110 static bool null_run
= false;
111 static int detailed_run
= 0;
112 static bool transaction_run
;
113 static bool big_num
= true;
114 static int big_num_opt
= -1;
115 static const char *csv_sep
= NULL
;
116 static bool csv_output
= false;
117 static bool group
= false;
118 static FILE *output
= NULL
;
119 static const char *pre_cmd
= NULL
;
120 static const char *post_cmd
= NULL
;
121 static bool sync_run
= false;
122 static unsigned int interval
= 0;
123 static unsigned int initial_delay
= 0;
124 static unsigned int unit_width
= 4; /* strlen("unit") */
125 static bool forever
= false;
126 static struct timespec ref_time
;
127 static struct cpu_map
*aggr_map
;
128 static int (*aggr_get_id
)(struct cpu_map
*m
, int cpu
);
130 static volatile int done
= 0;
132 static inline void diff_timespec(struct timespec
*r
, struct timespec
*a
,
135 r
->tv_sec
= a
->tv_sec
- b
->tv_sec
;
136 if (a
->tv_nsec
< b
->tv_nsec
) {
137 r
->tv_nsec
= a
->tv_nsec
+ 1000000000L - b
->tv_nsec
;
140 r
->tv_nsec
= a
->tv_nsec
- b
->tv_nsec
;
144 static inline struct cpu_map
*perf_evsel__cpus(struct perf_evsel
*evsel
)
146 return (evsel
->cpus
&& !target
.cpu_list
) ? evsel
->cpus
: evsel_list
->cpus
;
149 static inline int perf_evsel__nr_cpus(struct perf_evsel
*evsel
)
151 return perf_evsel__cpus(evsel
)->nr
;
154 static void perf_evsel__reset_stat_priv(struct perf_evsel
*evsel
)
157 struct perf_stat
*ps
= evsel
->priv
;
159 for (i
= 0; i
< 3; i
++)
160 init_stats(&ps
->res_stats
[i
]);
162 perf_stat_evsel_id_init(evsel
);
165 static int perf_evsel__alloc_stat_priv(struct perf_evsel
*evsel
)
167 evsel
->priv
= zalloc(sizeof(struct perf_stat
));
168 if (evsel
->priv
== NULL
)
170 perf_evsel__reset_stat_priv(evsel
);
174 static void perf_evsel__free_stat_priv(struct perf_evsel
*evsel
)
179 static int perf_evsel__alloc_prev_raw_counts(struct perf_evsel
*evsel
)
181 struct perf_counts
*counts
;
183 counts
= perf_counts__new(perf_evsel__nr_cpus(evsel
));
185 evsel
->prev_raw_counts
= counts
;
187 return counts
? 0 : -ENOMEM
;
190 static void perf_evsel__free_prev_raw_counts(struct perf_evsel
*evsel
)
192 perf_counts__delete(evsel
->prev_raw_counts
);
193 evsel
->prev_raw_counts
= NULL
;
196 static void perf_evlist__free_stats(struct perf_evlist
*evlist
)
198 struct perf_evsel
*evsel
;
200 evlist__for_each(evlist
, evsel
) {
201 perf_evsel__free_stat_priv(evsel
);
202 perf_evsel__free_counts(evsel
);
203 perf_evsel__free_prev_raw_counts(evsel
);
207 static int perf_evlist__alloc_stats(struct perf_evlist
*evlist
, bool alloc_raw
)
209 struct perf_evsel
*evsel
;
211 evlist__for_each(evlist
, evsel
) {
212 if (perf_evsel__alloc_stat_priv(evsel
) < 0 ||
213 perf_evsel__alloc_counts(evsel
, perf_evsel__nr_cpus(evsel
)) < 0 ||
214 (alloc_raw
&& perf_evsel__alloc_prev_raw_counts(evsel
) < 0))
221 perf_evlist__free_stats(evlist
);
225 static void perf_stat__reset_stats(struct perf_evlist
*evlist
)
227 struct perf_evsel
*evsel
;
229 evlist__for_each(evlist
, evsel
) {
230 perf_evsel__reset_stat_priv(evsel
);
231 perf_evsel__reset_counts(evsel
, perf_evsel__nr_cpus(evsel
));
234 perf_stat__reset_shadow_stats();
237 static int create_perf_stat_counter(struct perf_evsel
*evsel
)
239 struct perf_event_attr
*attr
= &evsel
->attr
;
242 attr
->read_format
= PERF_FORMAT_TOTAL_TIME_ENABLED
|
243 PERF_FORMAT_TOTAL_TIME_RUNNING
;
245 attr
->inherit
= !no_inherit
;
247 if (target__has_cpu(&target
))
248 return perf_evsel__open_per_cpu(evsel
, perf_evsel__cpus(evsel
));
250 if (!target__has_task(&target
) && perf_evsel__is_group_leader(evsel
)) {
253 attr
->enable_on_exec
= 1;
256 return perf_evsel__open_per_thread(evsel
, evsel_list
->threads
);
260 * Does the counter have nsecs as a unit?
262 static inline int nsec_counter(struct perf_evsel
*evsel
)
264 if (perf_evsel__match(evsel
, SOFTWARE
, SW_CPU_CLOCK
) ||
265 perf_evsel__match(evsel
, SOFTWARE
, SW_TASK_CLOCK
))
271 static void zero_per_pkg(struct perf_evsel
*counter
)
273 if (counter
->per_pkg_mask
)
274 memset(counter
->per_pkg_mask
, 0, MAX_NR_CPUS
);
277 static int check_per_pkg(struct perf_evsel
*counter
, int cpu
, bool *skip
)
279 unsigned long *mask
= counter
->per_pkg_mask
;
280 struct cpu_map
*cpus
= perf_evsel__cpus(counter
);
285 if (!counter
->per_pkg
)
288 if (cpu_map__empty(cpus
))
292 mask
= zalloc(MAX_NR_CPUS
);
296 counter
->per_pkg_mask
= mask
;
299 s
= cpu_map__get_socket(cpus
, cpu
);
303 *skip
= test_and_set_bit(s
, mask
) == 1;
307 static int read_cb(struct perf_evsel
*evsel
, int cpu
, int thread __maybe_unused
,
308 struct perf_counts_values
*count
)
310 struct perf_counts_values
*aggr
= &evsel
->counts
->aggr
;
311 static struct perf_counts_values zero
;
314 if (check_per_pkg(evsel
, cpu
, &skip
)) {
315 pr_err("failed to read per-pkg counter\n");
326 if (!evsel
->snapshot
)
327 perf_evsel__compute_deltas(evsel
, cpu
, count
);
328 perf_counts_values__scale(count
, scale
, NULL
);
329 evsel
->counts
->cpu
[cpu
] = *count
;
330 if (aggr_mode
== AGGR_NONE
)
331 perf_stat__update_shadow_stats(evsel
, count
->values
, cpu
);
334 aggr
->val
+= count
->val
;
336 aggr
->ena
+= count
->ena
;
337 aggr
->run
+= count
->run
;
346 static int read_counter(struct perf_evsel
*counter
);
349 * Read out the results of a single counter:
350 * aggregate counts across CPUs in system-wide mode
352 static int read_counter_aggr(struct perf_evsel
*counter
)
354 struct perf_counts_values
*aggr
= &counter
->counts
->aggr
;
355 struct perf_stat
*ps
= counter
->priv
;
356 u64
*count
= counter
->counts
->aggr
.values
;
359 aggr
->val
= aggr
->ena
= aggr
->run
= 0;
361 if (read_counter(counter
))
364 if (!counter
->snapshot
)
365 perf_evsel__compute_deltas(counter
, -1, aggr
);
366 perf_counts_values__scale(aggr
, scale
, &counter
->counts
->scaled
);
368 for (i
= 0; i
< 3; i
++)
369 update_stats(&ps
->res_stats
[i
], count
[i
]);
372 fprintf(output
, "%s: %" PRIu64
" %" PRIu64
" %" PRIu64
"\n",
373 perf_evsel__name(counter
), count
[0], count
[1], count
[2]);
377 * Save the full runtime - to allow normalization during printout:
379 perf_stat__update_shadow_stats(counter
, count
, 0);
385 * Read out the results of a single counter:
386 * do not aggregate counts across CPUs in system-wide mode
388 static int read_counter(struct perf_evsel
*counter
)
390 int nthreads
= thread_map__nr(evsel_list
->threads
);
391 int ncpus
= perf_evsel__nr_cpus(counter
);
394 if (!counter
->supported
)
397 if (counter
->system_wide
)
400 if (counter
->per_pkg
)
401 zero_per_pkg(counter
);
403 for (thread
= 0; thread
< nthreads
; thread
++) {
404 for (cpu
= 0; cpu
< ncpus
; cpu
++) {
405 if (perf_evsel__read_cb(counter
, cpu
, thread
, read_cb
))
413 static void print_interval(void)
415 static int num_print_interval
;
416 struct perf_evsel
*counter
;
417 struct perf_stat
*ps
;
418 struct timespec ts
, rs
;
421 if (aggr_mode
== AGGR_GLOBAL
) {
422 evlist__for_each(evsel_list
, counter
) {
424 memset(ps
->res_stats
, 0, sizeof(ps
->res_stats
));
425 read_counter_aggr(counter
);
428 evlist__for_each(evsel_list
, counter
) {
430 memset(ps
->res_stats
, 0, sizeof(ps
->res_stats
));
431 read_counter(counter
);
435 clock_gettime(CLOCK_MONOTONIC
, &ts
);
436 diff_timespec(&rs
, &ts
, &ref_time
);
437 sprintf(prefix
, "%6lu.%09lu%s", rs
.tv_sec
, rs
.tv_nsec
, csv_sep
);
439 if (num_print_interval
== 0 && !csv_output
) {
442 fprintf(output
, "# time socket cpus counts %*s events\n", unit_width
, "unit");
445 fprintf(output
, "# time core cpus counts %*s events\n", unit_width
, "unit");
448 fprintf(output
, "# time CPU counts %*s events\n", unit_width
, "unit");
452 fprintf(output
, "# time counts %*s events\n", unit_width
, "unit");
456 if (++num_print_interval
== 25)
457 num_print_interval
= 0;
465 evlist__for_each(evsel_list
, counter
)
466 print_counter(counter
, prefix
);
470 evlist__for_each(evsel_list
, counter
)
471 print_counter_aggr(counter
, prefix
);
477 static void handle_initial_delay(void)
479 struct perf_evsel
*counter
;
482 const int ncpus
= cpu_map__nr(evsel_list
->cpus
),
483 nthreads
= thread_map__nr(evsel_list
->threads
);
485 usleep(initial_delay
* 1000);
486 evlist__for_each(evsel_list
, counter
)
487 perf_evsel__enable(counter
, ncpus
, nthreads
);
491 static volatile int workload_exec_errno
;
494 * perf_evlist__prepare_workload will send a SIGUSR1
495 * if the fork fails, since we asked by setting its
496 * want_signal to true.
498 static void workload_exec_failed_signal(int signo __maybe_unused
, siginfo_t
*info
,
499 void *ucontext __maybe_unused
)
501 workload_exec_errno
= info
->si_value
.sival_int
;
504 static int __run_perf_stat(int argc
, const char **argv
)
507 unsigned long long t0
, t1
;
508 struct perf_evsel
*counter
;
512 const bool forks
= (argc
> 0);
515 ts
.tv_sec
= interval
/ 1000;
516 ts
.tv_nsec
= (interval
% 1000) * 1000000;
523 if (perf_evlist__prepare_workload(evsel_list
, &target
, argv
, false,
524 workload_exec_failed_signal
) < 0) {
525 perror("failed to prepare workload");
528 child_pid
= evsel_list
->workload
.pid
;
532 perf_evlist__set_leader(evsel_list
);
534 evlist__for_each(evsel_list
, counter
) {
535 if (create_perf_stat_counter(counter
) < 0) {
537 * PPC returns ENXIO for HW counters until 2.6.37
538 * (behavior changed with commit b0a873e).
540 if (errno
== EINVAL
|| errno
== ENOSYS
||
541 errno
== ENOENT
|| errno
== EOPNOTSUPP
||
544 ui__warning("%s event is not supported by the kernel.\n",
545 perf_evsel__name(counter
));
546 counter
->supported
= false;
548 if ((counter
->leader
!= counter
) ||
549 !(counter
->leader
->nr_members
> 1))
553 perf_evsel__open_strerror(counter
, &target
,
554 errno
, msg
, sizeof(msg
));
555 ui__error("%s\n", msg
);
558 kill(child_pid
, SIGTERM
);
562 counter
->supported
= true;
564 l
= strlen(counter
->unit
);
569 if (perf_evlist__apply_filters(evsel_list
, &counter
)) {
570 error("failed to set filter \"%s\" on event %s with %d (%s)\n",
571 counter
->filter
, perf_evsel__name(counter
), errno
,
572 strerror_r(errno
, msg
, sizeof(msg
)));
577 * Enable counters and exec the command:
580 clock_gettime(CLOCK_MONOTONIC
, &ref_time
);
583 perf_evlist__start_workload(evsel_list
);
584 handle_initial_delay();
587 while (!waitpid(child_pid
, &status
, WNOHANG
)) {
588 nanosleep(&ts
, NULL
);
594 if (workload_exec_errno
) {
595 const char *emsg
= strerror_r(workload_exec_errno
, msg
, sizeof(msg
));
596 pr_err("Workload failed: %s\n", emsg
);
600 if (WIFSIGNALED(status
))
601 psignal(WTERMSIG(status
), argv
[0]);
603 handle_initial_delay();
605 nanosleep(&ts
, NULL
);
613 update_stats(&walltime_nsecs_stats
, t1
- t0
);
615 if (aggr_mode
== AGGR_GLOBAL
) {
616 evlist__for_each(evsel_list
, counter
) {
617 read_counter_aggr(counter
);
618 perf_evsel__close_fd(counter
, perf_evsel__nr_cpus(counter
),
619 thread_map__nr(evsel_list
->threads
));
622 evlist__for_each(evsel_list
, counter
) {
623 read_counter(counter
);
624 perf_evsel__close_fd(counter
, perf_evsel__nr_cpus(counter
), 1);
628 return WEXITSTATUS(status
);
631 static int run_perf_stat(int argc
, const char **argv
)
636 ret
= system(pre_cmd
);
644 ret
= __run_perf_stat(argc
, argv
);
649 ret
= system(post_cmd
);
657 static void print_running(u64 run
, u64 ena
)
660 fprintf(output
, "%s%" PRIu64
"%s%.2f",
664 ena
? 100.0 * run
/ ena
: 100.0);
665 } else if (run
!= ena
) {
666 fprintf(output
, " (%.2f%%)", 100.0 * run
/ ena
);
670 static void print_noise_pct(double total
, double avg
)
672 double pct
= rel_stddev_stats(total
, avg
);
675 fprintf(output
, "%s%.2f%%", csv_sep
, pct
);
677 fprintf(output
, " ( +-%6.2f%% )", pct
);
680 static void print_noise(struct perf_evsel
*evsel
, double avg
)
682 struct perf_stat
*ps
;
688 print_noise_pct(stddev_stats(&ps
->res_stats
[0]), avg
);
691 static void aggr_printout(struct perf_evsel
*evsel
, int id
, int nr
)
695 fprintf(output
, "S%d-C%*d%s%*d%s",
696 cpu_map__id_to_socket(id
),
698 cpu_map__id_to_cpu(id
),
705 fprintf(output
, "S%*d%s%*d%s",
714 fprintf(output
, "CPU%*d%s",
716 perf_evsel__cpus(evsel
)->map
[id
], csv_sep
);
724 static void nsec_printout(int id
, int nr
, struct perf_evsel
*evsel
, double avg
)
726 double msecs
= avg
/ 1e6
;
727 const char *fmt_v
, *fmt_n
;
730 fmt_v
= csv_output
? "%.6f%s" : "%18.6f%s";
731 fmt_n
= csv_output
? "%s" : "%-25s";
733 aggr_printout(evsel
, id
, nr
);
735 scnprintf(name
, sizeof(name
), "%s%s",
736 perf_evsel__name(evsel
), csv_output
? "" : " (msec)");
738 fprintf(output
, fmt_v
, msecs
, csv_sep
);
741 fprintf(output
, "%s%s", evsel
->unit
, csv_sep
);
743 fprintf(output
, "%-*s%s", unit_width
, evsel
->unit
, csv_sep
);
745 fprintf(output
, fmt_n
, name
);
748 fprintf(output
, "%s%s", csv_sep
, evsel
->cgrp
->name
);
750 if (csv_output
|| interval
)
753 if (perf_evsel__match(evsel
, SOFTWARE
, SW_TASK_CLOCK
))
754 fprintf(output
, " # %8.3f CPUs utilized ",
755 avg
/ avg_stats(&walltime_nsecs_stats
));
757 fprintf(output
, " ");
760 static void abs_printout(int id
, int nr
, struct perf_evsel
*evsel
, double avg
)
762 double sc
= evsel
->scale
;
764 int cpu
= cpu_map__id_to_cpu(id
);
767 fmt
= sc
!= 1.0 ? "%.2f%s" : "%.0f%s";
770 fmt
= sc
!= 1.0 ? "%'18.2f%s" : "%'18.0f%s";
772 fmt
= sc
!= 1.0 ? "%18.2f%s" : "%18.0f%s";
775 aggr_printout(evsel
, id
, nr
);
777 if (aggr_mode
== AGGR_GLOBAL
)
780 fprintf(output
, fmt
, avg
, csv_sep
);
783 fprintf(output
, "%-*s%s",
784 csv_output
? 0 : unit_width
,
785 evsel
->unit
, csv_sep
);
787 fprintf(output
, "%-*s", csv_output
? 0 : 25, perf_evsel__name(evsel
));
790 fprintf(output
, "%s%s", csv_sep
, evsel
->cgrp
->name
);
792 if (csv_output
|| interval
)
795 perf_stat__print_shadow_stats(output
, evsel
, avg
, cpu
, aggr_mode
);
798 static void print_aggr(char *prefix
)
800 struct perf_evsel
*counter
;
801 int cpu
, cpu2
, s
, s2
, id
, nr
;
805 if (!(aggr_map
|| aggr_get_id
))
808 for (s
= 0; s
< aggr_map
->nr
; s
++) {
809 id
= aggr_map
->map
[s
];
810 evlist__for_each(evsel_list
, counter
) {
813 for (cpu
= 0; cpu
< perf_evsel__nr_cpus(counter
); cpu
++) {
814 cpu2
= perf_evsel__cpus(counter
)->map
[cpu
];
815 s2
= aggr_get_id(evsel_list
->cpus
, cpu2
);
818 val
+= counter
->counts
->cpu
[cpu
].val
;
819 ena
+= counter
->counts
->cpu
[cpu
].ena
;
820 run
+= counter
->counts
->cpu
[cpu
].run
;
824 fprintf(output
, "%s", prefix
);
826 if (run
== 0 || ena
== 0) {
827 aggr_printout(counter
, id
, nr
);
829 fprintf(output
, "%*s%s",
831 counter
->supported
? CNTR_NOT_COUNTED
: CNTR_NOT_SUPPORTED
,
834 fprintf(output
, "%-*s%s",
835 csv_output
? 0 : unit_width
,
836 counter
->unit
, csv_sep
);
838 fprintf(output
, "%*s",
839 csv_output
? 0 : -25,
840 perf_evsel__name(counter
));
843 fprintf(output
, "%s%s",
844 csv_sep
, counter
->cgrp
->name
);
846 print_running(run
, ena
);
850 uval
= val
* counter
->scale
;
852 if (nsec_counter(counter
))
853 nsec_printout(id
, nr
, counter
, uval
);
855 abs_printout(id
, nr
, counter
, uval
);
858 print_noise(counter
, 1.0);
860 print_running(run
, ena
);
867 * Print out the results of a single counter:
868 * aggregated counts in system-wide mode
870 static void print_counter_aggr(struct perf_evsel
*counter
, char *prefix
)
872 struct perf_stat
*ps
= counter
->priv
;
873 double avg
= avg_stats(&ps
->res_stats
[0]);
874 int scaled
= counter
->counts
->scaled
;
876 double avg_enabled
, avg_running
;
878 avg_enabled
= avg_stats(&ps
->res_stats
[1]);
879 avg_running
= avg_stats(&ps
->res_stats
[2]);
882 fprintf(output
, "%s", prefix
);
884 if (scaled
== -1 || !counter
->supported
) {
885 fprintf(output
, "%*s%s",
887 counter
->supported
? CNTR_NOT_COUNTED
: CNTR_NOT_SUPPORTED
,
889 fprintf(output
, "%-*s%s",
890 csv_output
? 0 : unit_width
,
891 counter
->unit
, csv_sep
);
892 fprintf(output
, "%*s",
893 csv_output
? 0 : -25,
894 perf_evsel__name(counter
));
897 fprintf(output
, "%s%s", csv_sep
, counter
->cgrp
->name
);
899 print_running(avg_running
, avg_enabled
);
904 uval
= avg
* counter
->scale
;
906 if (nsec_counter(counter
))
907 nsec_printout(-1, 0, counter
, uval
);
909 abs_printout(-1, 0, counter
, uval
);
911 print_noise(counter
, avg
);
913 print_running(avg_running
, avg_enabled
);
914 fprintf(output
, "\n");
918 * Print out the results of a single counter:
919 * does not use aggregated count in system-wide
921 static void print_counter(struct perf_evsel
*counter
, char *prefix
)
927 for (cpu
= 0; cpu
< perf_evsel__nr_cpus(counter
); cpu
++) {
928 val
= counter
->counts
->cpu
[cpu
].val
;
929 ena
= counter
->counts
->cpu
[cpu
].ena
;
930 run
= counter
->counts
->cpu
[cpu
].run
;
933 fprintf(output
, "%s", prefix
);
935 if (run
== 0 || ena
== 0) {
936 fprintf(output
, "CPU%*d%s%*s%s",
938 perf_evsel__cpus(counter
)->map
[cpu
], csv_sep
,
940 counter
->supported
? CNTR_NOT_COUNTED
: CNTR_NOT_SUPPORTED
,
943 fprintf(output
, "%-*s%s",
944 csv_output
? 0 : unit_width
,
945 counter
->unit
, csv_sep
);
947 fprintf(output
, "%*s",
948 csv_output
? 0 : -25,
949 perf_evsel__name(counter
));
952 fprintf(output
, "%s%s",
953 csv_sep
, counter
->cgrp
->name
);
955 print_running(run
, ena
);
960 uval
= val
* counter
->scale
;
962 if (nsec_counter(counter
))
963 nsec_printout(cpu
, 0, counter
, uval
);
965 abs_printout(cpu
, 0, counter
, uval
);
968 print_noise(counter
, 1.0);
969 print_running(run
, ena
);
975 static void print_stat(int argc
, const char **argv
)
977 struct perf_evsel
*counter
;
983 fprintf(output
, "\n");
984 fprintf(output
, " Performance counter stats for ");
985 if (target
.system_wide
)
986 fprintf(output
, "\'system wide");
987 else if (target
.cpu_list
)
988 fprintf(output
, "\'CPU(s) %s", target
.cpu_list
);
989 else if (!target__has_task(&target
)) {
990 fprintf(output
, "\'%s", argv
[0]);
991 for (i
= 1; i
< argc
; i
++)
992 fprintf(output
, " %s", argv
[i
]);
993 } else if (target
.pid
)
994 fprintf(output
, "process id \'%s", target
.pid
);
996 fprintf(output
, "thread id \'%s", target
.tid
);
998 fprintf(output
, "\'");
1000 fprintf(output
, " (%d runs)", run_count
);
1001 fprintf(output
, ":\n\n");
1004 switch (aggr_mode
) {
1010 evlist__for_each(evsel_list
, counter
)
1011 print_counter_aggr(counter
, NULL
);
1014 evlist__for_each(evsel_list
, counter
)
1015 print_counter(counter
, NULL
);
1023 fprintf(output
, "\n");
1024 fprintf(output
, " %17.9f seconds time elapsed",
1025 avg_stats(&walltime_nsecs_stats
)/1e9
);
1026 if (run_count
> 1) {
1027 fprintf(output
, " ");
1028 print_noise_pct(stddev_stats(&walltime_nsecs_stats
),
1029 avg_stats(&walltime_nsecs_stats
));
1031 fprintf(output
, "\n\n");
1035 static volatile int signr
= -1;
1037 static void skip_signal(int signo
)
1039 if ((child_pid
== -1) || interval
)
1044 * render child_pid harmless
1045 * won't send SIGTERM to a random
1046 * process in case of race condition
1047 * and fast PID recycling
1052 static void sig_atexit(void)
1057 * avoid race condition with SIGCHLD handler
1058 * in skip_signal() which is modifying child_pid
1059 * goal is to avoid send SIGTERM to a random
1063 sigaddset(&set
, SIGCHLD
);
1064 sigprocmask(SIG_BLOCK
, &set
, &oset
);
1066 if (child_pid
!= -1)
1067 kill(child_pid
, SIGTERM
);
1069 sigprocmask(SIG_SETMASK
, &oset
, NULL
);
1074 signal(signr
, SIG_DFL
);
1075 kill(getpid(), signr
);
1078 static int stat__set_big_num(const struct option
*opt __maybe_unused
,
1079 const char *s __maybe_unused
, int unset
)
1081 big_num_opt
= unset
? 0 : 1;
1085 static int perf_stat_init_aggr_mode(void)
1087 switch (aggr_mode
) {
1089 if (cpu_map__build_socket_map(evsel_list
->cpus
, &aggr_map
)) {
1090 perror("cannot build socket map");
1093 aggr_get_id
= cpu_map__get_socket
;
1096 if (cpu_map__build_core_map(evsel_list
->cpus
, &aggr_map
)) {
1097 perror("cannot build core map");
1100 aggr_get_id
= cpu_map__get_core
;
1111 * Add default attributes, if there were no attributes specified or
1112 * if -d/--detailed, -d -d or -d -d -d is used:
1114 static int add_default_attributes(void)
1116 struct perf_event_attr default_attrs
[] = {
1118 { .type
= PERF_TYPE_SOFTWARE
, .config
= PERF_COUNT_SW_TASK_CLOCK
},
1119 { .type
= PERF_TYPE_SOFTWARE
, .config
= PERF_COUNT_SW_CONTEXT_SWITCHES
},
1120 { .type
= PERF_TYPE_SOFTWARE
, .config
= PERF_COUNT_SW_CPU_MIGRATIONS
},
1121 { .type
= PERF_TYPE_SOFTWARE
, .config
= PERF_COUNT_SW_PAGE_FAULTS
},
1123 { .type
= PERF_TYPE_HARDWARE
, .config
= PERF_COUNT_HW_CPU_CYCLES
},
1124 { .type
= PERF_TYPE_HARDWARE
, .config
= PERF_COUNT_HW_STALLED_CYCLES_FRONTEND
},
1125 { .type
= PERF_TYPE_HARDWARE
, .config
= PERF_COUNT_HW_STALLED_CYCLES_BACKEND
},
1126 { .type
= PERF_TYPE_HARDWARE
, .config
= PERF_COUNT_HW_INSTRUCTIONS
},
1127 { .type
= PERF_TYPE_HARDWARE
, .config
= PERF_COUNT_HW_BRANCH_INSTRUCTIONS
},
1128 { .type
= PERF_TYPE_HARDWARE
, .config
= PERF_COUNT_HW_BRANCH_MISSES
},
1133 * Detailed stats (-d), covering the L1 and last level data caches:
1135 struct perf_event_attr detailed_attrs
[] = {
1137 { .type
= PERF_TYPE_HW_CACHE
,
1139 PERF_COUNT_HW_CACHE_L1D
<< 0 |
1140 (PERF_COUNT_HW_CACHE_OP_READ
<< 8) |
1141 (PERF_COUNT_HW_CACHE_RESULT_ACCESS
<< 16) },
1143 { .type
= PERF_TYPE_HW_CACHE
,
1145 PERF_COUNT_HW_CACHE_L1D
<< 0 |
1146 (PERF_COUNT_HW_CACHE_OP_READ
<< 8) |
1147 (PERF_COUNT_HW_CACHE_RESULT_MISS
<< 16) },
1149 { .type
= PERF_TYPE_HW_CACHE
,
1151 PERF_COUNT_HW_CACHE_LL
<< 0 |
1152 (PERF_COUNT_HW_CACHE_OP_READ
<< 8) |
1153 (PERF_COUNT_HW_CACHE_RESULT_ACCESS
<< 16) },
1155 { .type
= PERF_TYPE_HW_CACHE
,
1157 PERF_COUNT_HW_CACHE_LL
<< 0 |
1158 (PERF_COUNT_HW_CACHE_OP_READ
<< 8) |
1159 (PERF_COUNT_HW_CACHE_RESULT_MISS
<< 16) },
1163 * Very detailed stats (-d -d), covering the instruction cache and the TLB caches:
1165 struct perf_event_attr very_detailed_attrs
[] = {
1167 { .type
= PERF_TYPE_HW_CACHE
,
1169 PERF_COUNT_HW_CACHE_L1I
<< 0 |
1170 (PERF_COUNT_HW_CACHE_OP_READ
<< 8) |
1171 (PERF_COUNT_HW_CACHE_RESULT_ACCESS
<< 16) },
1173 { .type
= PERF_TYPE_HW_CACHE
,
1175 PERF_COUNT_HW_CACHE_L1I
<< 0 |
1176 (PERF_COUNT_HW_CACHE_OP_READ
<< 8) |
1177 (PERF_COUNT_HW_CACHE_RESULT_MISS
<< 16) },
1179 { .type
= PERF_TYPE_HW_CACHE
,
1181 PERF_COUNT_HW_CACHE_DTLB
<< 0 |
1182 (PERF_COUNT_HW_CACHE_OP_READ
<< 8) |
1183 (PERF_COUNT_HW_CACHE_RESULT_ACCESS
<< 16) },
1185 { .type
= PERF_TYPE_HW_CACHE
,
1187 PERF_COUNT_HW_CACHE_DTLB
<< 0 |
1188 (PERF_COUNT_HW_CACHE_OP_READ
<< 8) |
1189 (PERF_COUNT_HW_CACHE_RESULT_MISS
<< 16) },
1191 { .type
= PERF_TYPE_HW_CACHE
,
1193 PERF_COUNT_HW_CACHE_ITLB
<< 0 |
1194 (PERF_COUNT_HW_CACHE_OP_READ
<< 8) |
1195 (PERF_COUNT_HW_CACHE_RESULT_ACCESS
<< 16) },
1197 { .type
= PERF_TYPE_HW_CACHE
,
1199 PERF_COUNT_HW_CACHE_ITLB
<< 0 |
1200 (PERF_COUNT_HW_CACHE_OP_READ
<< 8) |
1201 (PERF_COUNT_HW_CACHE_RESULT_MISS
<< 16) },
1206 * Very, very detailed stats (-d -d -d), adding prefetch events:
1208 struct perf_event_attr very_very_detailed_attrs
[] = {
1210 { .type
= PERF_TYPE_HW_CACHE
,
1212 PERF_COUNT_HW_CACHE_L1D
<< 0 |
1213 (PERF_COUNT_HW_CACHE_OP_PREFETCH
<< 8) |
1214 (PERF_COUNT_HW_CACHE_RESULT_ACCESS
<< 16) },
1216 { .type
= PERF_TYPE_HW_CACHE
,
1218 PERF_COUNT_HW_CACHE_L1D
<< 0 |
1219 (PERF_COUNT_HW_CACHE_OP_PREFETCH
<< 8) |
1220 (PERF_COUNT_HW_CACHE_RESULT_MISS
<< 16) },
1223 /* Set attrs if no event is selected and !null_run: */
1227 if (transaction_run
) {
1229 if (pmu_have_event("cpu", "cycles-ct") &&
1230 pmu_have_event("cpu", "el-start"))
1231 err
= parse_events(evsel_list
, transaction_attrs
, NULL
);
1233 err
= parse_events(evsel_list
, transaction_limited_attrs
, NULL
);
1235 fprintf(stderr
, "Cannot set up transaction events\n");
1241 if (!evsel_list
->nr_entries
) {
1242 if (perf_evlist__add_default_attrs(evsel_list
, default_attrs
) < 0)
1246 /* Detailed events get appended to the event list: */
1248 if (detailed_run
< 1)
1251 /* Append detailed run extra attributes: */
1252 if (perf_evlist__add_default_attrs(evsel_list
, detailed_attrs
) < 0)
1255 if (detailed_run
< 2)
1258 /* Append very detailed run extra attributes: */
1259 if (perf_evlist__add_default_attrs(evsel_list
, very_detailed_attrs
) < 0)
1262 if (detailed_run
< 3)
1265 /* Append very, very detailed run extra attributes: */
1266 return perf_evlist__add_default_attrs(evsel_list
, very_very_detailed_attrs
);
1269 int cmd_stat(int argc
, const char **argv
, const char *prefix __maybe_unused
)
1271 bool append_file
= false;
1273 const char *output_name
= NULL
;
1274 const struct option options
[] = {
1275 OPT_BOOLEAN('T', "transaction", &transaction_run
,
1276 "hardware transaction statistics"),
1277 OPT_CALLBACK('e', "event", &evsel_list
, "event",
1278 "event selector. use 'perf list' to list available events",
1279 parse_events_option
),
1280 OPT_CALLBACK(0, "filter", &evsel_list
, "filter",
1281 "event filter", parse_filter
),
1282 OPT_BOOLEAN('i', "no-inherit", &no_inherit
,
1283 "child tasks do not inherit counters"),
1284 OPT_STRING('p', "pid", &target
.pid
, "pid",
1285 "stat events on existing process id"),
1286 OPT_STRING('t', "tid", &target
.tid
, "tid",
1287 "stat events on existing thread id"),
1288 OPT_BOOLEAN('a', "all-cpus", &target
.system_wide
,
1289 "system-wide collection from all CPUs"),
1290 OPT_BOOLEAN('g', "group", &group
,
1291 "put the counters into a counter group"),
1292 OPT_BOOLEAN('c', "scale", &scale
, "scale/normalize counters"),
1293 OPT_INCR('v', "verbose", &verbose
,
1294 "be more verbose (show counter open errors, etc)"),
1295 OPT_INTEGER('r', "repeat", &run_count
,
1296 "repeat command and print average + stddev (max: 100, forever: 0)"),
1297 OPT_BOOLEAN('n', "null", &null_run
,
1298 "null run - dont start any counters"),
1299 OPT_INCR('d', "detailed", &detailed_run
,
1300 "detailed run - start a lot of events"),
1301 OPT_BOOLEAN('S', "sync", &sync_run
,
1302 "call sync() before starting a run"),
1303 OPT_CALLBACK_NOOPT('B', "big-num", NULL
, NULL
,
1304 "print large numbers with thousands\' separators",
1306 OPT_STRING('C', "cpu", &target
.cpu_list
, "cpu",
1307 "list of cpus to monitor in system-wide"),
1308 OPT_SET_UINT('A', "no-aggr", &aggr_mode
,
1309 "disable CPU count aggregation", AGGR_NONE
),
1310 OPT_STRING('x', "field-separator", &csv_sep
, "separator",
1311 "print counts with custom separator"),
1312 OPT_CALLBACK('G', "cgroup", &evsel_list
, "name",
1313 "monitor event in cgroup name only", parse_cgroups
),
1314 OPT_STRING('o', "output", &output_name
, "file", "output file name"),
1315 OPT_BOOLEAN(0, "append", &append_file
, "append to the output file"),
1316 OPT_INTEGER(0, "log-fd", &output_fd
,
1317 "log output to fd, instead of stderr"),
1318 OPT_STRING(0, "pre", &pre_cmd
, "command",
1319 "command to run prior to the measured command"),
1320 OPT_STRING(0, "post", &post_cmd
, "command",
1321 "command to run after to the measured command"),
1322 OPT_UINTEGER('I', "interval-print", &interval
,
1323 "print counts at regular interval in ms (>= 100)"),
1324 OPT_SET_UINT(0, "per-socket", &aggr_mode
,
1325 "aggregate counts per processor socket", AGGR_SOCKET
),
1326 OPT_SET_UINT(0, "per-core", &aggr_mode
,
1327 "aggregate counts per physical processor core", AGGR_CORE
),
1328 OPT_UINTEGER('D', "delay", &initial_delay
,
1329 "ms to wait before starting measurement after program start"),
1332 const char * const stat_usage
[] = {
1333 "perf stat [<options>] [<command>]",
1336 int status
= -EINVAL
, run_idx
;
1339 setlocale(LC_ALL
, "");
1341 evsel_list
= perf_evlist__new();
1342 if (evsel_list
== NULL
)
1345 argc
= parse_options(argc
, argv
, options
, stat_usage
,
1346 PARSE_OPT_STOP_AT_NON_OPTION
);
1349 if (output_name
&& strcmp(output_name
, "-"))
1352 if (output_name
&& output_fd
) {
1353 fprintf(stderr
, "cannot use both --output and --log-fd\n");
1354 parse_options_usage(stat_usage
, options
, "o", 1);
1355 parse_options_usage(NULL
, options
, "log-fd", 0);
1359 if (output_fd
< 0) {
1360 fprintf(stderr
, "argument to --log-fd must be a > 0\n");
1361 parse_options_usage(stat_usage
, options
, "log-fd", 0);
1367 mode
= append_file
? "a" : "w";
1369 output
= fopen(output_name
, mode
);
1371 perror("failed to create output file");
1374 clock_gettime(CLOCK_REALTIME
, &tm
);
1375 fprintf(output
, "# started on %s\n", ctime(&tm
.tv_sec
));
1376 } else if (output_fd
> 0) {
1377 mode
= append_file
? "a" : "w";
1378 output
= fdopen(output_fd
, mode
);
1380 perror("Failed opening logfd");
1387 if (!strcmp(csv_sep
, "\\t"))
1390 csv_sep
= DEFAULT_SEPARATOR
;
1393 * let the spreadsheet do the pretty-printing
1396 /* User explicitly passed -B? */
1397 if (big_num_opt
== 1) {
1398 fprintf(stderr
, "-B option not supported with -x\n");
1399 parse_options_usage(stat_usage
, options
, "B", 1);
1400 parse_options_usage(NULL
, options
, "x", 1);
1402 } else /* Nope, so disable big number formatting */
1404 } else if (big_num_opt
== 0) /* User passed --no-big-num */
1407 if (!argc
&& target__none(&target
))
1408 usage_with_options(stat_usage
, options
);
1410 if (run_count
< 0) {
1411 pr_err("Run count must be a positive number\n");
1412 parse_options_usage(stat_usage
, options
, "r", 1);
1414 } else if (run_count
== 0) {
1419 /* no_aggr, cgroup are for system-wide only */
1420 if ((aggr_mode
!= AGGR_GLOBAL
|| nr_cgroups
) &&
1421 !target__has_cpu(&target
)) {
1422 fprintf(stderr
, "both cgroup and no-aggregation "
1423 "modes only available in system-wide mode\n");
1425 parse_options_usage(stat_usage
, options
, "G", 1);
1426 parse_options_usage(NULL
, options
, "A", 1);
1427 parse_options_usage(NULL
, options
, "a", 1);
1431 if (add_default_attributes())
1434 target__validate(&target
);
1436 if (perf_evlist__create_maps(evsel_list
, &target
) < 0) {
1437 if (target__has_task(&target
)) {
1438 pr_err("Problems finding threads of monitor\n");
1439 parse_options_usage(stat_usage
, options
, "p", 1);
1440 parse_options_usage(NULL
, options
, "t", 1);
1441 } else if (target__has_cpu(&target
)) {
1442 perror("failed to parse CPUs map");
1443 parse_options_usage(stat_usage
, options
, "C", 1);
1444 parse_options_usage(NULL
, options
, "a", 1);
1448 if (interval
&& interval
< 100) {
1449 pr_err("print interval must be >= 100ms\n");
1450 parse_options_usage(stat_usage
, options
, "I", 1);
1454 if (perf_evlist__alloc_stats(evsel_list
, interval
))
1457 if (perf_stat_init_aggr_mode())
1461 * We dont want to block the signals - that would cause
1462 * child tasks to inherit that and Ctrl-C would not work.
1463 * What we want is for Ctrl-C to work in the exec()-ed
1464 * task, but being ignored by perf stat itself:
1468 signal(SIGINT
, skip_signal
);
1469 signal(SIGCHLD
, skip_signal
);
1470 signal(SIGALRM
, skip_signal
);
1471 signal(SIGABRT
, skip_signal
);
1474 for (run_idx
= 0; forever
|| run_idx
< run_count
; run_idx
++) {
1475 if (run_count
!= 1 && verbose
)
1476 fprintf(output
, "[ perf stat: executing run #%d ... ]\n",
1479 status
= run_perf_stat(argc
, argv
);
1480 if (forever
&& status
!= -1) {
1481 print_stat(argc
, argv
);
1482 perf_stat__reset_stats(evsel_list
);
1486 if (!forever
&& status
!= -1 && !interval
)
1487 print_stat(argc
, argv
);
1489 perf_evlist__free_stats(evsel_list
);
1491 perf_evlist__delete(evsel_list
);