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 <subcmd/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"
62 #include "util/session.h"
63 #include "util/tool.h"
67 #include <sys/prctl.h>
70 #define DEFAULT_SEPARATOR " "
71 #define CNTR_NOT_SUPPORTED "<not supported>"
72 #define CNTR_NOT_COUNTED "<not counted>"
74 static void print_counters(struct timespec
*ts
, int argc
, const char **argv
);
76 /* Default events used for perf stat -T */
77 static const char *transaction_attrs
= {
89 /* More limited version when the CPU does not have all events. */
90 static const char * transaction_limited_attrs
= {
100 static struct perf_evlist
*evsel_list
;
102 static struct target target
= {
106 typedef int (*aggr_get_id_t
)(struct cpu_map
*m
, int cpu
);
108 static int run_count
= 1;
109 static bool no_inherit
= false;
110 static volatile pid_t child_pid
= -1;
111 static bool null_run
= false;
112 static int detailed_run
= 0;
113 static bool transaction_run
;
114 static bool big_num
= true;
115 static int big_num_opt
= -1;
116 static const char *csv_sep
= NULL
;
117 static bool csv_output
= false;
118 static bool group
= false;
119 static const char *pre_cmd
= NULL
;
120 static const char *post_cmd
= NULL
;
121 static bool sync_run
= false;
122 static unsigned int initial_delay
= 0;
123 static unsigned int unit_width
= 4; /* strlen("unit") */
124 static bool forever
= false;
125 static struct timespec ref_time
;
126 static struct cpu_map
*aggr_map
;
127 static aggr_get_id_t aggr_get_id
;
128 static bool append_file
;
129 static const char *output_name
;
130 static int output_fd
;
134 struct perf_data_file file
;
135 struct perf_session
*session
;
137 struct perf_tool tool
;
139 struct cpu_map
*cpus
;
140 struct thread_map
*threads
;
141 enum aggr_mode aggr_mode
;
144 static struct perf_stat perf_stat
;
145 #define STAT_RECORD perf_stat.record
147 static volatile int done
= 0;
149 static struct perf_stat_config stat_config
= {
150 .aggr_mode
= AGGR_GLOBAL
,
154 static inline void diff_timespec(struct timespec
*r
, struct timespec
*a
,
157 r
->tv_sec
= a
->tv_sec
- b
->tv_sec
;
158 if (a
->tv_nsec
< b
->tv_nsec
) {
159 r
->tv_nsec
= a
->tv_nsec
+ 1000000000L - b
->tv_nsec
;
162 r
->tv_nsec
= a
->tv_nsec
- b
->tv_nsec
;
166 static void perf_stat__reset_stats(void)
168 perf_evlist__reset_stats(evsel_list
);
169 perf_stat__reset_shadow_stats();
172 static int create_perf_stat_counter(struct perf_evsel
*evsel
)
174 struct perf_event_attr
*attr
= &evsel
->attr
;
176 if (stat_config
.scale
)
177 attr
->read_format
= PERF_FORMAT_TOTAL_TIME_ENABLED
|
178 PERF_FORMAT_TOTAL_TIME_RUNNING
;
180 attr
->inherit
= !no_inherit
;
183 * Some events get initialized with sample_(period/type) set,
184 * like tracepoints. Clear it up for counting.
186 attr
->sample_period
= 0;
189 * But set sample_type to PERF_SAMPLE_IDENTIFIER, which should be harmless
190 * while avoiding that older tools show confusing messages.
192 * However for pipe sessions we need to keep it zero,
193 * because script's perf_evsel__check_attr is triggered
194 * by attr->sample_type != 0, and we can't run it on
197 if (!(STAT_RECORD
&& perf_stat
.file
.is_pipe
))
198 attr
->sample_type
= PERF_SAMPLE_IDENTIFIER
;
201 * Disabling all counters initially, they will be enabled
202 * either manually by us or by kernel via enable_on_exec
205 if (perf_evsel__is_group_leader(evsel
)) {
209 * In case of initial_delay we enable tracee
212 if (target__none(&target
) && !initial_delay
)
213 attr
->enable_on_exec
= 1;
216 if (target__has_cpu(&target
))
217 return perf_evsel__open_per_cpu(evsel
, perf_evsel__cpus(evsel
));
219 return perf_evsel__open_per_thread(evsel
, evsel_list
->threads
);
223 * Does the counter have nsecs as a unit?
225 static inline int nsec_counter(struct perf_evsel
*evsel
)
227 if (perf_evsel__match(evsel
, SOFTWARE
, SW_CPU_CLOCK
) ||
228 perf_evsel__match(evsel
, SOFTWARE
, SW_TASK_CLOCK
))
234 static int process_synthesized_event(struct perf_tool
*tool __maybe_unused
,
235 union perf_event
*event
,
236 struct perf_sample
*sample __maybe_unused
,
237 struct machine
*machine __maybe_unused
)
239 if (perf_data_file__write(&perf_stat
.file
, event
, event
->header
.size
) < 0) {
240 pr_err("failed to write perf data, error: %m\n");
244 perf_stat
.bytes_written
+= event
->header
.size
;
248 static int write_stat_round_event(u64 tm
, u64 type
)
250 return perf_event__synthesize_stat_round(NULL
, tm
, type
,
251 process_synthesized_event
,
255 #define WRITE_STAT_ROUND_EVENT(time, interval) \
256 write_stat_round_event(time, PERF_STAT_ROUND_TYPE__ ## interval)
258 #define SID(e, x, y) xyarray__entry(e->sample_id, x, y)
261 perf_evsel__write_stat_event(struct perf_evsel
*counter
, u32 cpu
, u32 thread
,
262 struct perf_counts_values
*count
)
264 struct perf_sample_id
*sid
= SID(counter
, cpu
, thread
);
266 return perf_event__synthesize_stat(NULL
, cpu
, thread
, sid
->id
, count
,
267 process_synthesized_event
, NULL
);
271 * Read out the results of a single counter:
272 * do not aggregate counts across CPUs in system-wide mode
274 static int read_counter(struct perf_evsel
*counter
)
276 int nthreads
= thread_map__nr(evsel_list
->threads
);
277 int ncpus
= perf_evsel__nr_cpus(counter
);
280 if (!counter
->supported
)
283 if (counter
->system_wide
)
286 for (thread
= 0; thread
< nthreads
; thread
++) {
287 for (cpu
= 0; cpu
< ncpus
; cpu
++) {
288 struct perf_counts_values
*count
;
290 count
= perf_counts(counter
->counts
, cpu
, thread
);
291 if (perf_evsel__read(counter
, cpu
, thread
, count
))
295 if (perf_evsel__write_stat_event(counter
, cpu
, thread
, count
)) {
296 pr_err("failed to write stat event\n");
306 static void read_counters(bool close_counters
)
308 struct perf_evsel
*counter
;
310 evlist__for_each(evsel_list
, counter
) {
311 if (read_counter(counter
))
312 pr_debug("failed to read counter %s\n", counter
->name
);
314 if (perf_stat_process_counter(&stat_config
, counter
))
315 pr_warning("failed to process counter %s\n", counter
->name
);
317 if (close_counters
) {
318 perf_evsel__close_fd(counter
, perf_evsel__nr_cpus(counter
),
319 thread_map__nr(evsel_list
->threads
));
324 static void process_interval(void)
326 struct timespec ts
, rs
;
328 read_counters(false);
330 clock_gettime(CLOCK_MONOTONIC
, &ts
);
331 diff_timespec(&rs
, &ts
, &ref_time
);
334 if (WRITE_STAT_ROUND_EVENT(rs
.tv_sec
* NSECS_PER_SEC
+ rs
.tv_nsec
, INTERVAL
))
335 pr_err("failed to write stat round event\n");
338 print_counters(&rs
, 0, NULL
);
341 static void enable_counters(void)
344 usleep(initial_delay
* 1000);
347 * We need to enable counters only if:
348 * - we don't have tracee (attaching to task or cpu)
349 * - we have initial delay configured
351 if (!target__none(&target
) || initial_delay
)
352 perf_evlist__enable(evsel_list
);
355 static volatile int workload_exec_errno
;
358 * perf_evlist__prepare_workload will send a SIGUSR1
359 * if the fork fails, since we asked by setting its
360 * want_signal to true.
362 static void workload_exec_failed_signal(int signo __maybe_unused
, siginfo_t
*info
,
363 void *ucontext __maybe_unused
)
365 workload_exec_errno
= info
->si_value
.sival_int
;
368 static bool has_unit(struct perf_evsel
*counter
)
370 return counter
->unit
&& *counter
->unit
;
373 static bool has_scale(struct perf_evsel
*counter
)
375 return counter
->scale
!= 1;
378 static int perf_stat_synthesize_config(bool is_pipe
)
380 struct perf_evsel
*counter
;
384 err
= perf_event__synthesize_attrs(NULL
, perf_stat
.session
,
385 process_synthesized_event
);
387 pr_err("Couldn't synthesize attrs.\n");
393 * Synthesize other events stuff not carried within
394 * attr event - unit, scale, name
396 evlist__for_each(evsel_list
, counter
) {
397 if (!counter
->supported
)
401 * Synthesize unit and scale only if it's defined.
403 if (has_unit(counter
)) {
404 err
= perf_event__synthesize_event_update_unit(NULL
, counter
, process_synthesized_event
);
406 pr_err("Couldn't synthesize evsel unit.\n");
411 if (has_scale(counter
)) {
412 err
= perf_event__synthesize_event_update_scale(NULL
, counter
, process_synthesized_event
);
414 pr_err("Couldn't synthesize evsel scale.\n");
419 if (counter
->own_cpus
) {
420 err
= perf_event__synthesize_event_update_cpus(NULL
, counter
, process_synthesized_event
);
422 pr_err("Couldn't synthesize evsel scale.\n");
428 * Name is needed only for pipe output,
429 * perf.data carries event names.
432 err
= perf_event__synthesize_event_update_name(NULL
, counter
, process_synthesized_event
);
434 pr_err("Couldn't synthesize evsel name.\n");
440 err
= perf_event__synthesize_thread_map2(NULL
, evsel_list
->threads
,
441 process_synthesized_event
,
444 pr_err("Couldn't synthesize thread map.\n");
448 err
= perf_event__synthesize_cpu_map(NULL
, evsel_list
->cpus
,
449 process_synthesized_event
, NULL
);
451 pr_err("Couldn't synthesize thread map.\n");
455 err
= perf_event__synthesize_stat_config(NULL
, &stat_config
,
456 process_synthesized_event
, NULL
);
458 pr_err("Couldn't synthesize config.\n");
465 #define FD(e, x, y) (*(int *)xyarray__entry(e->fd, x, y))
467 static int __store_counter_ids(struct perf_evsel
*counter
,
468 struct cpu_map
*cpus
,
469 struct thread_map
*threads
)
473 for (cpu
= 0; cpu
< cpus
->nr
; cpu
++) {
474 for (thread
= 0; thread
< threads
->nr
; thread
++) {
475 int fd
= FD(counter
, cpu
, thread
);
477 if (perf_evlist__id_add_fd(evsel_list
, counter
,
478 cpu
, thread
, fd
) < 0)
486 static int store_counter_ids(struct perf_evsel
*counter
)
488 struct cpu_map
*cpus
= counter
->cpus
;
489 struct thread_map
*threads
= counter
->threads
;
491 if (perf_evsel__alloc_id(counter
, cpus
->nr
, threads
->nr
))
494 return __store_counter_ids(counter
, cpus
, threads
);
497 static int __run_perf_stat(int argc
, const char **argv
)
499 int interval
= stat_config
.interval
;
501 unsigned long long t0
, t1
;
502 struct perf_evsel
*counter
;
506 const bool forks
= (argc
> 0);
507 bool is_pipe
= STAT_RECORD
? perf_stat
.file
.is_pipe
: false;
510 ts
.tv_sec
= interval
/ 1000;
511 ts
.tv_nsec
= (interval
% 1000) * 1000000;
518 if (perf_evlist__prepare_workload(evsel_list
, &target
, argv
, is_pipe
,
519 workload_exec_failed_signal
) < 0) {
520 perror("failed to prepare workload");
523 child_pid
= evsel_list
->workload
.pid
;
527 perf_evlist__set_leader(evsel_list
);
529 evlist__for_each(evsel_list
, counter
) {
530 if (create_perf_stat_counter(counter
) < 0) {
532 * PPC returns ENXIO for HW counters until 2.6.37
533 * (behavior changed with commit b0a873e).
535 if (errno
== EINVAL
|| errno
== ENOSYS
||
536 errno
== ENOENT
|| errno
== EOPNOTSUPP
||
539 ui__warning("%s event is not supported by the kernel.\n",
540 perf_evsel__name(counter
));
541 counter
->supported
= false;
543 if ((counter
->leader
!= counter
) ||
544 !(counter
->leader
->nr_members
> 1))
548 perf_evsel__open_strerror(counter
, &target
,
549 errno
, msg
, sizeof(msg
));
550 ui__error("%s\n", msg
);
553 kill(child_pid
, SIGTERM
);
557 counter
->supported
= true;
559 l
= strlen(counter
->unit
);
563 if (STAT_RECORD
&& store_counter_ids(counter
))
567 if (perf_evlist__apply_filters(evsel_list
, &counter
)) {
568 error("failed to set filter \"%s\" on event %s with %d (%s)\n",
569 counter
->filter
, perf_evsel__name(counter
), errno
,
570 strerror_r(errno
, msg
, sizeof(msg
)));
575 int err
, fd
= perf_data_file__fd(&perf_stat
.file
);
578 err
= perf_header__write_pipe(perf_data_file__fd(&perf_stat
.file
));
580 err
= perf_session__write_header(perf_stat
.session
, evsel_list
,
587 err
= perf_stat_synthesize_config(is_pipe
);
593 * Enable counters and exec the command:
596 clock_gettime(CLOCK_MONOTONIC
, &ref_time
);
599 perf_evlist__start_workload(evsel_list
);
603 while (!waitpid(child_pid
, &status
, WNOHANG
)) {
604 nanosleep(&ts
, NULL
);
610 if (workload_exec_errno
) {
611 const char *emsg
= strerror_r(workload_exec_errno
, msg
, sizeof(msg
));
612 pr_err("Workload failed: %s\n", emsg
);
616 if (WIFSIGNALED(status
))
617 psignal(WTERMSIG(status
), argv
[0]);
621 nanosleep(&ts
, NULL
);
629 update_stats(&walltime_nsecs_stats
, t1
- t0
);
633 return WEXITSTATUS(status
);
636 static int run_perf_stat(int argc
, const char **argv
)
641 ret
= system(pre_cmd
);
649 ret
= __run_perf_stat(argc
, argv
);
654 ret
= system(post_cmd
);
662 static void print_running(u64 run
, u64 ena
)
665 fprintf(stat_config
.output
, "%s%" PRIu64
"%s%.2f",
669 ena
? 100.0 * run
/ ena
: 100.0);
670 } else if (run
!= ena
) {
671 fprintf(stat_config
.output
, " (%.2f%%)", 100.0 * run
/ ena
);
675 static void print_noise_pct(double total
, double avg
)
677 double pct
= rel_stddev_stats(total
, avg
);
680 fprintf(stat_config
.output
, "%s%.2f%%", csv_sep
, pct
);
682 fprintf(stat_config
.output
, " ( +-%6.2f%% )", pct
);
685 static void print_noise(struct perf_evsel
*evsel
, double avg
)
687 struct perf_stat_evsel
*ps
;
693 print_noise_pct(stddev_stats(&ps
->res_stats
[0]), avg
);
696 static void aggr_printout(struct perf_evsel
*evsel
, int id
, int nr
)
698 switch (stat_config
.aggr_mode
) {
700 fprintf(stat_config
.output
, "S%d-C%*d%s%*d%s",
701 cpu_map__id_to_socket(id
),
703 cpu_map__id_to_cpu(id
),
710 fprintf(stat_config
.output
, "S%*d%s%*d%s",
719 fprintf(stat_config
.output
, "CPU%*d%s",
721 perf_evsel__cpus(evsel
)->map
[id
], csv_sep
);
724 fprintf(stat_config
.output
, "%*s-%*d%s",
726 thread_map__comm(evsel
->threads
, id
),
728 thread_map__pid(evsel
->threads
, id
),
743 #define METRIC_LEN 35
745 static void new_line_std(void *ctx
)
747 struct outstate
*os
= ctx
;
752 static void do_new_line_std(struct outstate
*os
)
755 if (stat_config
.aggr_mode
== AGGR_NONE
)
756 fprintf(os
->fh
, " ");
757 if (stat_config
.aggr_mode
== AGGR_CORE
)
758 fprintf(os
->fh
, " ");
759 if (stat_config
.aggr_mode
== AGGR_SOCKET
)
760 fprintf(os
->fh
, " ");
761 fprintf(os
->fh
, " ");
764 static void print_metric_std(void *ctx
, const char *color
, const char *fmt
,
765 const char *unit
, double val
)
767 struct outstate
*os
= ctx
;
770 bool newline
= os
->newline
;
774 if (unit
== NULL
|| fmt
== NULL
) {
775 fprintf(out
, "%-*s", METRIC_LEN
, "");
782 n
= fprintf(out
, " # ");
784 n
+= color_fprintf(out
, color
, fmt
, val
);
786 n
+= fprintf(out
, fmt
, val
);
787 fprintf(out
, " %-*s", METRIC_LEN
- n
- 1, unit
);
790 static void nsec_printout(int id
, int nr
, struct perf_evsel
*evsel
, double avg
)
792 FILE *output
= stat_config
.output
;
793 double msecs
= avg
/ 1e6
;
794 const char *fmt_v
, *fmt_n
;
797 fmt_v
= csv_output
? "%.6f%s" : "%18.6f%s";
798 fmt_n
= csv_output
? "%s" : "%-25s";
800 aggr_printout(evsel
, id
, nr
);
802 scnprintf(name
, sizeof(name
), "%s%s",
803 perf_evsel__name(evsel
), csv_output
? "" : " (msec)");
805 fprintf(output
, fmt_v
, msecs
, csv_sep
);
808 fprintf(output
, "%s%s", evsel
->unit
, csv_sep
);
810 fprintf(output
, "%-*s%s", unit_width
, evsel
->unit
, csv_sep
);
812 fprintf(output
, fmt_n
, name
);
815 fprintf(output
, "%s%s", csv_sep
, evsel
->cgrp
->name
);
818 static void abs_printout(int id
, int nr
, struct perf_evsel
*evsel
, double avg
)
820 FILE *output
= stat_config
.output
;
821 double sc
= evsel
->scale
;
825 fmt
= sc
!= 1.0 ? "%.2f%s" : "%.0f%s";
828 fmt
= sc
!= 1.0 ? "%'18.2f%s" : "%'18.0f%s";
830 fmt
= sc
!= 1.0 ? "%18.2f%s" : "%18.0f%s";
833 aggr_printout(evsel
, id
, nr
);
835 fprintf(output
, fmt
, avg
, csv_sep
);
838 fprintf(output
, "%-*s%s",
839 csv_output
? 0 : unit_width
,
840 evsel
->unit
, csv_sep
);
842 fprintf(output
, "%-*s", csv_output
? 0 : 25, perf_evsel__name(evsel
));
845 fprintf(output
, "%s%s", csv_sep
, evsel
->cgrp
->name
);
848 static void printout(int id
, int nr
, struct perf_evsel
*counter
, double uval
)
850 struct outstate os
= { .fh
= stat_config
.output
};
851 struct perf_stat_output_ctx out
;
852 print_metric_t pm
= print_metric_std
;
857 if (nsec_counter(counter
))
858 nsec_printout(id
, nr
, counter
, uval
);
860 abs_printout(id
, nr
, counter
, uval
);
862 out
.print_metric
= pm
;
866 if (!csv_output
&& !stat_config
.interval
)
867 perf_stat__print_shadow_stats(counter
, uval
,
868 stat_config
.aggr_mode
== AGGR_GLOBAL
? 0 :
869 cpu_map__id_to_cpu(id
),
873 static void print_aggr(char *prefix
)
875 FILE *output
= stat_config
.output
;
876 struct perf_evsel
*counter
;
877 int cpu
, s
, s2
, id
, nr
;
881 if (!(aggr_map
|| aggr_get_id
))
884 for (s
= 0; s
< aggr_map
->nr
; s
++) {
885 id
= aggr_map
->map
[s
];
886 evlist__for_each(evsel_list
, counter
) {
889 for (cpu
= 0; cpu
< perf_evsel__nr_cpus(counter
); cpu
++) {
890 s2
= aggr_get_id(perf_evsel__cpus(counter
), cpu
);
893 val
+= perf_counts(counter
->counts
, cpu
, 0)->val
;
894 ena
+= perf_counts(counter
->counts
, cpu
, 0)->ena
;
895 run
+= perf_counts(counter
->counts
, cpu
, 0)->run
;
899 fprintf(output
, "%s", prefix
);
901 if (run
== 0 || ena
== 0) {
902 aggr_printout(counter
, id
, nr
);
904 fprintf(output
, "%*s%s",
906 counter
->supported
? CNTR_NOT_COUNTED
: CNTR_NOT_SUPPORTED
,
909 fprintf(output
, "%-*s%s",
910 csv_output
? 0 : unit_width
,
911 counter
->unit
, csv_sep
);
913 fprintf(output
, "%*s",
914 csv_output
? 0 : -25,
915 perf_evsel__name(counter
));
918 fprintf(output
, "%s%s",
919 csv_sep
, counter
->cgrp
->name
);
921 print_running(run
, ena
);
925 uval
= val
* counter
->scale
;
926 printout(id
, nr
, counter
, uval
);
928 print_noise(counter
, 1.0);
930 print_running(run
, ena
);
936 static void print_aggr_thread(struct perf_evsel
*counter
, char *prefix
)
938 FILE *output
= stat_config
.output
;
939 int nthreads
= thread_map__nr(counter
->threads
);
940 int ncpus
= cpu_map__nr(counter
->cpus
);
944 for (thread
= 0; thread
< nthreads
; thread
++) {
945 u64 ena
= 0, run
= 0, val
= 0;
947 for (cpu
= 0; cpu
< ncpus
; cpu
++) {
948 val
+= perf_counts(counter
->counts
, cpu
, thread
)->val
;
949 ena
+= perf_counts(counter
->counts
, cpu
, thread
)->ena
;
950 run
+= perf_counts(counter
->counts
, cpu
, thread
)->run
;
954 fprintf(output
, "%s", prefix
);
956 uval
= val
* counter
->scale
;
957 printout(thread
, 0, counter
, uval
);
960 print_noise(counter
, 1.0);
962 print_running(run
, ena
);
968 * Print out the results of a single counter:
969 * aggregated counts in system-wide mode
971 static void print_counter_aggr(struct perf_evsel
*counter
, char *prefix
)
973 FILE *output
= stat_config
.output
;
974 struct perf_stat_evsel
*ps
= counter
->priv
;
975 double avg
= avg_stats(&ps
->res_stats
[0]);
976 int scaled
= counter
->counts
->scaled
;
978 double avg_enabled
, avg_running
;
980 avg_enabled
= avg_stats(&ps
->res_stats
[1]);
981 avg_running
= avg_stats(&ps
->res_stats
[2]);
984 fprintf(output
, "%s", prefix
);
986 if (scaled
== -1 || !counter
->supported
) {
987 fprintf(output
, "%*s%s",
989 counter
->supported
? CNTR_NOT_COUNTED
: CNTR_NOT_SUPPORTED
,
991 fprintf(output
, "%-*s%s",
992 csv_output
? 0 : unit_width
,
993 counter
->unit
, csv_sep
);
994 fprintf(output
, "%*s",
995 csv_output
? 0 : -25,
996 perf_evsel__name(counter
));
999 fprintf(output
, "%s%s", csv_sep
, counter
->cgrp
->name
);
1001 print_running(avg_running
, avg_enabled
);
1002 fputc('\n', output
);
1006 uval
= avg
* counter
->scale
;
1007 printout(-1, 0, counter
, uval
);
1009 print_noise(counter
, avg
);
1011 print_running(avg_running
, avg_enabled
);
1012 fprintf(output
, "\n");
1016 * Print out the results of a single counter:
1017 * does not use aggregated count in system-wide
1019 static void print_counter(struct perf_evsel
*counter
, char *prefix
)
1021 FILE *output
= stat_config
.output
;
1026 for (cpu
= 0; cpu
< perf_evsel__nr_cpus(counter
); cpu
++) {
1027 val
= perf_counts(counter
->counts
, cpu
, 0)->val
;
1028 ena
= perf_counts(counter
->counts
, cpu
, 0)->ena
;
1029 run
= perf_counts(counter
->counts
, cpu
, 0)->run
;
1032 fprintf(output
, "%s", prefix
);
1034 if (run
== 0 || ena
== 0) {
1035 fprintf(output
, "CPU%*d%s%*s%s",
1036 csv_output
? 0 : -4,
1037 perf_evsel__cpus(counter
)->map
[cpu
], csv_sep
,
1038 csv_output
? 0 : 18,
1039 counter
->supported
? CNTR_NOT_COUNTED
: CNTR_NOT_SUPPORTED
,
1042 fprintf(output
, "%-*s%s",
1043 csv_output
? 0 : unit_width
,
1044 counter
->unit
, csv_sep
);
1046 fprintf(output
, "%*s",
1047 csv_output
? 0 : -25,
1048 perf_evsel__name(counter
));
1051 fprintf(output
, "%s%s",
1052 csv_sep
, counter
->cgrp
->name
);
1054 print_running(run
, ena
);
1055 fputc('\n', output
);
1059 uval
= val
* counter
->scale
;
1060 printout(cpu
, 0, counter
, uval
);
1062 print_noise(counter
, 1.0);
1063 print_running(run
, ena
);
1065 fputc('\n', output
);
1069 static void print_interval(char *prefix
, struct timespec
*ts
)
1071 FILE *output
= stat_config
.output
;
1072 static int num_print_interval
;
1074 sprintf(prefix
, "%6lu.%09lu%s", ts
->tv_sec
, ts
->tv_nsec
, csv_sep
);
1076 if (num_print_interval
== 0 && !csv_output
) {
1077 switch (stat_config
.aggr_mode
) {
1079 fprintf(output
, "# time socket cpus counts %*s events\n", unit_width
, "unit");
1082 fprintf(output
, "# time core cpus counts %*s events\n", unit_width
, "unit");
1085 fprintf(output
, "# time CPU counts %*s events\n", unit_width
, "unit");
1088 fprintf(output
, "# time comm-pid counts %*s events\n", unit_width
, "unit");
1092 fprintf(output
, "# time counts %*s events\n", unit_width
, "unit");
1098 if (++num_print_interval
== 25)
1099 num_print_interval
= 0;
1102 static void print_header(int argc
, const char **argv
)
1104 FILE *output
= stat_config
.output
;
1110 fprintf(output
, "\n");
1111 fprintf(output
, " Performance counter stats for ");
1112 if (target
.system_wide
)
1113 fprintf(output
, "\'system wide");
1114 else if (target
.cpu_list
)
1115 fprintf(output
, "\'CPU(s) %s", target
.cpu_list
);
1116 else if (!target__has_task(&target
)) {
1117 fprintf(output
, "\'%s", argv
? argv
[0] : "pipe");
1118 for (i
= 1; argv
&& (i
< argc
); i
++)
1119 fprintf(output
, " %s", argv
[i
]);
1120 } else if (target
.pid
)
1121 fprintf(output
, "process id \'%s", target
.pid
);
1123 fprintf(output
, "thread id \'%s", target
.tid
);
1125 fprintf(output
, "\'");
1127 fprintf(output
, " (%d runs)", run_count
);
1128 fprintf(output
, ":\n\n");
1132 static void print_footer(void)
1134 FILE *output
= stat_config
.output
;
1137 fprintf(output
, "\n");
1138 fprintf(output
, " %17.9f seconds time elapsed",
1139 avg_stats(&walltime_nsecs_stats
)/1e9
);
1140 if (run_count
> 1) {
1141 fprintf(output
, " ");
1142 print_noise_pct(stddev_stats(&walltime_nsecs_stats
),
1143 avg_stats(&walltime_nsecs_stats
));
1145 fprintf(output
, "\n\n");
1148 static void print_counters(struct timespec
*ts
, int argc
, const char **argv
)
1150 int interval
= stat_config
.interval
;
1151 struct perf_evsel
*counter
;
1152 char buf
[64], *prefix
= NULL
;
1154 /* Do not print anything if we record to the pipe. */
1155 if (STAT_RECORD
&& perf_stat
.file
.is_pipe
)
1159 print_interval(prefix
= buf
, ts
);
1161 print_header(argc
, argv
);
1163 switch (stat_config
.aggr_mode
) {
1169 evlist__for_each(evsel_list
, counter
)
1170 print_aggr_thread(counter
, prefix
);
1173 evlist__for_each(evsel_list
, counter
)
1174 print_counter_aggr(counter
, prefix
);
1177 evlist__for_each(evsel_list
, counter
)
1178 print_counter(counter
, prefix
);
1185 if (!interval
&& !csv_output
)
1188 fflush(stat_config
.output
);
1191 static volatile int signr
= -1;
1193 static void skip_signal(int signo
)
1195 if ((child_pid
== -1) || stat_config
.interval
)
1200 * render child_pid harmless
1201 * won't send SIGTERM to a random
1202 * process in case of race condition
1203 * and fast PID recycling
1208 static void sig_atexit(void)
1213 * avoid race condition with SIGCHLD handler
1214 * in skip_signal() which is modifying child_pid
1215 * goal is to avoid send SIGTERM to a random
1219 sigaddset(&set
, SIGCHLD
);
1220 sigprocmask(SIG_BLOCK
, &set
, &oset
);
1222 if (child_pid
!= -1)
1223 kill(child_pid
, SIGTERM
);
1225 sigprocmask(SIG_SETMASK
, &oset
, NULL
);
1230 signal(signr
, SIG_DFL
);
1231 kill(getpid(), signr
);
1234 static int stat__set_big_num(const struct option
*opt __maybe_unused
,
1235 const char *s __maybe_unused
, int unset
)
1237 big_num_opt
= unset
? 0 : 1;
1241 static const struct option stat_options
[] = {
1242 OPT_BOOLEAN('T', "transaction", &transaction_run
,
1243 "hardware transaction statistics"),
1244 OPT_CALLBACK('e', "event", &evsel_list
, "event",
1245 "event selector. use 'perf list' to list available events",
1246 parse_events_option
),
1247 OPT_CALLBACK(0, "filter", &evsel_list
, "filter",
1248 "event filter", parse_filter
),
1249 OPT_BOOLEAN('i', "no-inherit", &no_inherit
,
1250 "child tasks do not inherit counters"),
1251 OPT_STRING('p', "pid", &target
.pid
, "pid",
1252 "stat events on existing process id"),
1253 OPT_STRING('t', "tid", &target
.tid
, "tid",
1254 "stat events on existing thread id"),
1255 OPT_BOOLEAN('a', "all-cpus", &target
.system_wide
,
1256 "system-wide collection from all CPUs"),
1257 OPT_BOOLEAN('g', "group", &group
,
1258 "put the counters into a counter group"),
1259 OPT_BOOLEAN('c', "scale", &stat_config
.scale
, "scale/normalize counters"),
1260 OPT_INCR('v', "verbose", &verbose
,
1261 "be more verbose (show counter open errors, etc)"),
1262 OPT_INTEGER('r', "repeat", &run_count
,
1263 "repeat command and print average + stddev (max: 100, forever: 0)"),
1264 OPT_BOOLEAN('n', "null", &null_run
,
1265 "null run - dont start any counters"),
1266 OPT_INCR('d', "detailed", &detailed_run
,
1267 "detailed run - start a lot of events"),
1268 OPT_BOOLEAN('S', "sync", &sync_run
,
1269 "call sync() before starting a run"),
1270 OPT_CALLBACK_NOOPT('B', "big-num", NULL
, NULL
,
1271 "print large numbers with thousands\' separators",
1273 OPT_STRING('C', "cpu", &target
.cpu_list
, "cpu",
1274 "list of cpus to monitor in system-wide"),
1275 OPT_SET_UINT('A', "no-aggr", &stat_config
.aggr_mode
,
1276 "disable CPU count aggregation", AGGR_NONE
),
1277 OPT_STRING('x', "field-separator", &csv_sep
, "separator",
1278 "print counts with custom separator"),
1279 OPT_CALLBACK('G', "cgroup", &evsel_list
, "name",
1280 "monitor event in cgroup name only", parse_cgroups
),
1281 OPT_STRING('o', "output", &output_name
, "file", "output file name"),
1282 OPT_BOOLEAN(0, "append", &append_file
, "append to the output file"),
1283 OPT_INTEGER(0, "log-fd", &output_fd
,
1284 "log output to fd, instead of stderr"),
1285 OPT_STRING(0, "pre", &pre_cmd
, "command",
1286 "command to run prior to the measured command"),
1287 OPT_STRING(0, "post", &post_cmd
, "command",
1288 "command to run after to the measured command"),
1289 OPT_UINTEGER('I', "interval-print", &stat_config
.interval
,
1290 "print counts at regular interval in ms (>= 10)"),
1291 OPT_SET_UINT(0, "per-socket", &stat_config
.aggr_mode
,
1292 "aggregate counts per processor socket", AGGR_SOCKET
),
1293 OPT_SET_UINT(0, "per-core", &stat_config
.aggr_mode
,
1294 "aggregate counts per physical processor core", AGGR_CORE
),
1295 OPT_SET_UINT(0, "per-thread", &stat_config
.aggr_mode
,
1296 "aggregate counts per thread", AGGR_THREAD
),
1297 OPT_UINTEGER('D', "delay", &initial_delay
,
1298 "ms to wait before starting measurement after program start"),
1302 static int perf_stat__get_socket(struct cpu_map
*map
, int cpu
)
1304 return cpu_map__get_socket(map
, cpu
, NULL
);
1307 static int perf_stat__get_core(struct cpu_map
*map
, int cpu
)
1309 return cpu_map__get_core(map
, cpu
, NULL
);
1312 static int cpu_map__get_max(struct cpu_map
*map
)
1316 for (i
= 0; i
< map
->nr
; i
++) {
1317 if (map
->map
[i
] > max
)
1324 static struct cpu_map
*cpus_aggr_map
;
1326 static int perf_stat__get_aggr(aggr_get_id_t get_id
, struct cpu_map
*map
, int idx
)
1333 cpu
= map
->map
[idx
];
1335 if (cpus_aggr_map
->map
[cpu
] == -1)
1336 cpus_aggr_map
->map
[cpu
] = get_id(map
, idx
);
1338 return cpus_aggr_map
->map
[cpu
];
1341 static int perf_stat__get_socket_cached(struct cpu_map
*map
, int idx
)
1343 return perf_stat__get_aggr(perf_stat__get_socket
, map
, idx
);
1346 static int perf_stat__get_core_cached(struct cpu_map
*map
, int idx
)
1348 return perf_stat__get_aggr(perf_stat__get_core
, map
, idx
);
1351 static int perf_stat_init_aggr_mode(void)
1355 switch (stat_config
.aggr_mode
) {
1357 if (cpu_map__build_socket_map(evsel_list
->cpus
, &aggr_map
)) {
1358 perror("cannot build socket map");
1361 aggr_get_id
= perf_stat__get_socket_cached
;
1364 if (cpu_map__build_core_map(evsel_list
->cpus
, &aggr_map
)) {
1365 perror("cannot build core map");
1368 aggr_get_id
= perf_stat__get_core_cached
;
1379 * The evsel_list->cpus is the base we operate on,
1380 * taking the highest cpu number to be the size of
1381 * the aggregation translate cpumap.
1383 nr
= cpu_map__get_max(evsel_list
->cpus
);
1384 cpus_aggr_map
= cpu_map__empty_new(nr
+ 1);
1385 return cpus_aggr_map
? 0 : -ENOMEM
;
1388 static void perf_stat__exit_aggr_mode(void)
1390 cpu_map__put(aggr_map
);
1391 cpu_map__put(cpus_aggr_map
);
1393 cpus_aggr_map
= NULL
;
1396 static inline int perf_env__get_cpu(struct perf_env
*env
, struct cpu_map
*map
, int idx
)
1403 cpu
= map
->map
[idx
];
1405 if (cpu
>= env
->nr_cpus_online
)
1411 static int perf_env__get_socket(struct cpu_map
*map
, int idx
, void *data
)
1413 struct perf_env
*env
= data
;
1414 int cpu
= perf_env__get_cpu(env
, map
, idx
);
1416 return cpu
== -1 ? -1 : env
->cpu
[cpu
].socket_id
;
1419 static int perf_env__get_core(struct cpu_map
*map
, int idx
, void *data
)
1421 struct perf_env
*env
= data
;
1422 int core
= -1, cpu
= perf_env__get_cpu(env
, map
, idx
);
1425 int socket_id
= env
->cpu
[cpu
].socket_id
;
1428 * Encode socket in upper 16 bits
1429 * core_id is relative to socket, and
1430 * we need a global id. So we combine
1433 core
= (socket_id
<< 16) | (env
->cpu
[cpu
].core_id
& 0xffff);
1439 static int perf_env__build_socket_map(struct perf_env
*env
, struct cpu_map
*cpus
,
1440 struct cpu_map
**sockp
)
1442 return cpu_map__build_map(cpus
, sockp
, perf_env__get_socket
, env
);
1445 static int perf_env__build_core_map(struct perf_env
*env
, struct cpu_map
*cpus
,
1446 struct cpu_map
**corep
)
1448 return cpu_map__build_map(cpus
, corep
, perf_env__get_core
, env
);
1451 static int perf_stat__get_socket_file(struct cpu_map
*map
, int idx
)
1453 return perf_env__get_socket(map
, idx
, &perf_stat
.session
->header
.env
);
1456 static int perf_stat__get_core_file(struct cpu_map
*map
, int idx
)
1458 return perf_env__get_core(map
, idx
, &perf_stat
.session
->header
.env
);
1461 static int perf_stat_init_aggr_mode_file(struct perf_stat
*st
)
1463 struct perf_env
*env
= &st
->session
->header
.env
;
1465 switch (stat_config
.aggr_mode
) {
1467 if (perf_env__build_socket_map(env
, evsel_list
->cpus
, &aggr_map
)) {
1468 perror("cannot build socket map");
1471 aggr_get_id
= perf_stat__get_socket_file
;
1474 if (perf_env__build_core_map(env
, evsel_list
->cpus
, &aggr_map
)) {
1475 perror("cannot build core map");
1478 aggr_get_id
= perf_stat__get_core_file
;
1492 * Add default attributes, if there were no attributes specified or
1493 * if -d/--detailed, -d -d or -d -d -d is used:
1495 static int add_default_attributes(void)
1497 struct perf_event_attr default_attrs
[] = {
1499 { .type
= PERF_TYPE_SOFTWARE
, .config
= PERF_COUNT_SW_TASK_CLOCK
},
1500 { .type
= PERF_TYPE_SOFTWARE
, .config
= PERF_COUNT_SW_CONTEXT_SWITCHES
},
1501 { .type
= PERF_TYPE_SOFTWARE
, .config
= PERF_COUNT_SW_CPU_MIGRATIONS
},
1502 { .type
= PERF_TYPE_SOFTWARE
, .config
= PERF_COUNT_SW_PAGE_FAULTS
},
1504 { .type
= PERF_TYPE_HARDWARE
, .config
= PERF_COUNT_HW_CPU_CYCLES
},
1505 { .type
= PERF_TYPE_HARDWARE
, .config
= PERF_COUNT_HW_STALLED_CYCLES_FRONTEND
},
1506 { .type
= PERF_TYPE_HARDWARE
, .config
= PERF_COUNT_HW_STALLED_CYCLES_BACKEND
},
1507 { .type
= PERF_TYPE_HARDWARE
, .config
= PERF_COUNT_HW_INSTRUCTIONS
},
1508 { .type
= PERF_TYPE_HARDWARE
, .config
= PERF_COUNT_HW_BRANCH_INSTRUCTIONS
},
1509 { .type
= PERF_TYPE_HARDWARE
, .config
= PERF_COUNT_HW_BRANCH_MISSES
},
1514 * Detailed stats (-d), covering the L1 and last level data caches:
1516 struct perf_event_attr detailed_attrs
[] = {
1518 { .type
= PERF_TYPE_HW_CACHE
,
1520 PERF_COUNT_HW_CACHE_L1D
<< 0 |
1521 (PERF_COUNT_HW_CACHE_OP_READ
<< 8) |
1522 (PERF_COUNT_HW_CACHE_RESULT_ACCESS
<< 16) },
1524 { .type
= PERF_TYPE_HW_CACHE
,
1526 PERF_COUNT_HW_CACHE_L1D
<< 0 |
1527 (PERF_COUNT_HW_CACHE_OP_READ
<< 8) |
1528 (PERF_COUNT_HW_CACHE_RESULT_MISS
<< 16) },
1530 { .type
= PERF_TYPE_HW_CACHE
,
1532 PERF_COUNT_HW_CACHE_LL
<< 0 |
1533 (PERF_COUNT_HW_CACHE_OP_READ
<< 8) |
1534 (PERF_COUNT_HW_CACHE_RESULT_ACCESS
<< 16) },
1536 { .type
= PERF_TYPE_HW_CACHE
,
1538 PERF_COUNT_HW_CACHE_LL
<< 0 |
1539 (PERF_COUNT_HW_CACHE_OP_READ
<< 8) |
1540 (PERF_COUNT_HW_CACHE_RESULT_MISS
<< 16) },
1544 * Very detailed stats (-d -d), covering the instruction cache and the TLB caches:
1546 struct perf_event_attr very_detailed_attrs
[] = {
1548 { .type
= PERF_TYPE_HW_CACHE
,
1550 PERF_COUNT_HW_CACHE_L1I
<< 0 |
1551 (PERF_COUNT_HW_CACHE_OP_READ
<< 8) |
1552 (PERF_COUNT_HW_CACHE_RESULT_ACCESS
<< 16) },
1554 { .type
= PERF_TYPE_HW_CACHE
,
1556 PERF_COUNT_HW_CACHE_L1I
<< 0 |
1557 (PERF_COUNT_HW_CACHE_OP_READ
<< 8) |
1558 (PERF_COUNT_HW_CACHE_RESULT_MISS
<< 16) },
1560 { .type
= PERF_TYPE_HW_CACHE
,
1562 PERF_COUNT_HW_CACHE_DTLB
<< 0 |
1563 (PERF_COUNT_HW_CACHE_OP_READ
<< 8) |
1564 (PERF_COUNT_HW_CACHE_RESULT_ACCESS
<< 16) },
1566 { .type
= PERF_TYPE_HW_CACHE
,
1568 PERF_COUNT_HW_CACHE_DTLB
<< 0 |
1569 (PERF_COUNT_HW_CACHE_OP_READ
<< 8) |
1570 (PERF_COUNT_HW_CACHE_RESULT_MISS
<< 16) },
1572 { .type
= PERF_TYPE_HW_CACHE
,
1574 PERF_COUNT_HW_CACHE_ITLB
<< 0 |
1575 (PERF_COUNT_HW_CACHE_OP_READ
<< 8) |
1576 (PERF_COUNT_HW_CACHE_RESULT_ACCESS
<< 16) },
1578 { .type
= PERF_TYPE_HW_CACHE
,
1580 PERF_COUNT_HW_CACHE_ITLB
<< 0 |
1581 (PERF_COUNT_HW_CACHE_OP_READ
<< 8) |
1582 (PERF_COUNT_HW_CACHE_RESULT_MISS
<< 16) },
1587 * Very, very detailed stats (-d -d -d), adding prefetch events:
1589 struct perf_event_attr very_very_detailed_attrs
[] = {
1591 { .type
= PERF_TYPE_HW_CACHE
,
1593 PERF_COUNT_HW_CACHE_L1D
<< 0 |
1594 (PERF_COUNT_HW_CACHE_OP_PREFETCH
<< 8) |
1595 (PERF_COUNT_HW_CACHE_RESULT_ACCESS
<< 16) },
1597 { .type
= PERF_TYPE_HW_CACHE
,
1599 PERF_COUNT_HW_CACHE_L1D
<< 0 |
1600 (PERF_COUNT_HW_CACHE_OP_PREFETCH
<< 8) |
1601 (PERF_COUNT_HW_CACHE_RESULT_MISS
<< 16) },
1604 /* Set attrs if no event is selected and !null_run: */
1608 if (transaction_run
) {
1610 if (pmu_have_event("cpu", "cycles-ct") &&
1611 pmu_have_event("cpu", "el-start"))
1612 err
= parse_events(evsel_list
, transaction_attrs
, NULL
);
1614 err
= parse_events(evsel_list
, transaction_limited_attrs
, NULL
);
1616 fprintf(stderr
, "Cannot set up transaction events\n");
1622 if (!evsel_list
->nr_entries
) {
1623 if (perf_evlist__add_default_attrs(evsel_list
, default_attrs
) < 0)
1627 /* Detailed events get appended to the event list: */
1629 if (detailed_run
< 1)
1632 /* Append detailed run extra attributes: */
1633 if (perf_evlist__add_default_attrs(evsel_list
, detailed_attrs
) < 0)
1636 if (detailed_run
< 2)
1639 /* Append very detailed run extra attributes: */
1640 if (perf_evlist__add_default_attrs(evsel_list
, very_detailed_attrs
) < 0)
1643 if (detailed_run
< 3)
1646 /* Append very, very detailed run extra attributes: */
1647 return perf_evlist__add_default_attrs(evsel_list
, very_very_detailed_attrs
);
1650 static const char * const stat_record_usage
[] = {
1651 "perf stat record [<options>]",
1655 static void init_features(struct perf_session
*session
)
1659 for (feat
= HEADER_FIRST_FEATURE
; feat
< HEADER_LAST_FEATURE
; feat
++)
1660 perf_header__set_feat(&session
->header
, feat
);
1662 perf_header__clear_feat(&session
->header
, HEADER_BUILD_ID
);
1663 perf_header__clear_feat(&session
->header
, HEADER_TRACING_DATA
);
1664 perf_header__clear_feat(&session
->header
, HEADER_BRANCH_STACK
);
1665 perf_header__clear_feat(&session
->header
, HEADER_AUXTRACE
);
1668 static int __cmd_record(int argc
, const char **argv
)
1670 struct perf_session
*session
;
1671 struct perf_data_file
*file
= &perf_stat
.file
;
1673 argc
= parse_options(argc
, argv
, stat_options
, stat_record_usage
,
1674 PARSE_OPT_STOP_AT_NON_OPTION
);
1677 file
->path
= output_name
;
1679 if (run_count
!= 1 || forever
) {
1680 pr_err("Cannot use -r option with perf stat record.\n");
1684 session
= perf_session__new(file
, false, NULL
);
1685 if (session
== NULL
) {
1686 pr_err("Perf session creation failed.\n");
1690 init_features(session
);
1692 session
->evlist
= evsel_list
;
1693 perf_stat
.session
= session
;
1694 perf_stat
.record
= true;
1698 static int process_stat_round_event(struct perf_tool
*tool __maybe_unused
,
1699 union perf_event
*event
,
1700 struct perf_session
*session
)
1702 struct stat_round_event
*round
= &event
->stat_round
;
1703 struct perf_evsel
*counter
;
1704 struct timespec tsh
, *ts
= NULL
;
1705 const char **argv
= session
->header
.env
.cmdline_argv
;
1706 int argc
= session
->header
.env
.nr_cmdline
;
1708 evlist__for_each(evsel_list
, counter
)
1709 perf_stat_process_counter(&stat_config
, counter
);
1711 if (round
->type
== PERF_STAT_ROUND_TYPE__FINAL
)
1712 update_stats(&walltime_nsecs_stats
, round
->time
);
1714 if (stat_config
.interval
&& round
->time
) {
1715 tsh
.tv_sec
= round
->time
/ NSECS_PER_SEC
;
1716 tsh
.tv_nsec
= round
->time
% NSECS_PER_SEC
;
1720 print_counters(ts
, argc
, argv
);
1725 int process_stat_config_event(struct perf_tool
*tool __maybe_unused
,
1726 union perf_event
*event
,
1727 struct perf_session
*session __maybe_unused
)
1729 struct perf_stat
*st
= container_of(tool
, struct perf_stat
, tool
);
1731 perf_event__read_stat_config(&stat_config
, &event
->stat_config
);
1733 if (cpu_map__empty(st
->cpus
)) {
1734 if (st
->aggr_mode
!= AGGR_UNSET
)
1735 pr_warning("warning: processing task data, aggregation mode not set\n");
1739 if (st
->aggr_mode
!= AGGR_UNSET
)
1740 stat_config
.aggr_mode
= st
->aggr_mode
;
1742 if (perf_stat
.file
.is_pipe
)
1743 perf_stat_init_aggr_mode();
1745 perf_stat_init_aggr_mode_file(st
);
1750 static int set_maps(struct perf_stat
*st
)
1752 if (!st
->cpus
|| !st
->threads
)
1755 if (WARN_ONCE(st
->maps_allocated
, "stats double allocation\n"))
1758 perf_evlist__set_maps(evsel_list
, st
->cpus
, st
->threads
);
1760 if (perf_evlist__alloc_stats(evsel_list
, true))
1763 st
->maps_allocated
= true;
1768 int process_thread_map_event(struct perf_tool
*tool __maybe_unused
,
1769 union perf_event
*event
,
1770 struct perf_session
*session __maybe_unused
)
1772 struct perf_stat
*st
= container_of(tool
, struct perf_stat
, tool
);
1775 pr_warning("Extra thread map event, ignoring.\n");
1779 st
->threads
= thread_map__new_event(&event
->thread_map
);
1783 return set_maps(st
);
1787 int process_cpu_map_event(struct perf_tool
*tool __maybe_unused
,
1788 union perf_event
*event
,
1789 struct perf_session
*session __maybe_unused
)
1791 struct perf_stat
*st
= container_of(tool
, struct perf_stat
, tool
);
1792 struct cpu_map
*cpus
;
1795 pr_warning("Extra cpu map event, ignoring.\n");
1799 cpus
= cpu_map__new_data(&event
->cpu_map
.data
);
1804 return set_maps(st
);
1807 static const char * const stat_report_usage
[] = {
1808 "perf stat report [<options>]",
1812 static struct perf_stat perf_stat
= {
1814 .attr
= perf_event__process_attr
,
1815 .event_update
= perf_event__process_event_update
,
1816 .thread_map
= process_thread_map_event
,
1817 .cpu_map
= process_cpu_map_event
,
1818 .stat_config
= process_stat_config_event
,
1819 .stat
= perf_event__process_stat_event
,
1820 .stat_round
= process_stat_round_event
,
1822 .aggr_mode
= AGGR_UNSET
,
1825 static int __cmd_report(int argc
, const char **argv
)
1827 struct perf_session
*session
;
1828 const struct option options
[] = {
1829 OPT_STRING('i', "input", &input_name
, "file", "input file name"),
1830 OPT_SET_UINT(0, "per-socket", &perf_stat
.aggr_mode
,
1831 "aggregate counts per processor socket", AGGR_SOCKET
),
1832 OPT_SET_UINT(0, "per-core", &perf_stat
.aggr_mode
,
1833 "aggregate counts per physical processor core", AGGR_CORE
),
1834 OPT_SET_UINT('A', "no-aggr", &perf_stat
.aggr_mode
,
1835 "disable CPU count aggregation", AGGR_NONE
),
1841 argc
= parse_options(argc
, argv
, options
, stat_report_usage
, 0);
1843 if (!input_name
|| !strlen(input_name
)) {
1844 if (!fstat(STDIN_FILENO
, &st
) && S_ISFIFO(st
.st_mode
))
1847 input_name
= "perf.data";
1850 perf_stat
.file
.path
= input_name
;
1851 perf_stat
.file
.mode
= PERF_DATA_MODE_READ
;
1853 session
= perf_session__new(&perf_stat
.file
, false, &perf_stat
.tool
);
1854 if (session
== NULL
)
1857 perf_stat
.session
= session
;
1858 stat_config
.output
= stderr
;
1859 evsel_list
= session
->evlist
;
1861 ret
= perf_session__process_events(session
);
1865 perf_session__delete(session
);
1869 int cmd_stat(int argc
, const char **argv
, const char *prefix __maybe_unused
)
1871 const char * const stat_usage
[] = {
1872 "perf stat [<options>] [<command>]",
1875 int status
= -EINVAL
, run_idx
;
1877 FILE *output
= stderr
;
1878 unsigned int interval
;
1879 const char * const stat_subcommands
[] = { "record", "report" };
1881 setlocale(LC_ALL
, "");
1883 evsel_list
= perf_evlist__new();
1884 if (evsel_list
== NULL
)
1887 argc
= parse_options_subcommand(argc
, argv
, stat_options
, stat_subcommands
,
1888 (const char **) stat_usage
,
1889 PARSE_OPT_STOP_AT_NON_OPTION
);
1893 if (!strcmp(csv_sep
, "\\t"))
1896 csv_sep
= DEFAULT_SEPARATOR
;
1898 if (argc
&& !strncmp(argv
[0], "rec", 3)) {
1899 argc
= __cmd_record(argc
, argv
);
1902 } else if (argc
&& !strncmp(argv
[0], "rep", 3))
1903 return __cmd_report(argc
, argv
);
1905 interval
= stat_config
.interval
;
1908 * For record command the -o is already taken care of.
1910 if (!STAT_RECORD
&& output_name
&& strcmp(output_name
, "-"))
1913 if (output_name
&& output_fd
) {
1914 fprintf(stderr
, "cannot use both --output and --log-fd\n");
1915 parse_options_usage(stat_usage
, stat_options
, "o", 1);
1916 parse_options_usage(NULL
, stat_options
, "log-fd", 0);
1920 if (output_fd
< 0) {
1921 fprintf(stderr
, "argument to --log-fd must be a > 0\n");
1922 parse_options_usage(stat_usage
, stat_options
, "log-fd", 0);
1928 mode
= append_file
? "a" : "w";
1930 output
= fopen(output_name
, mode
);
1932 perror("failed to create output file");
1935 clock_gettime(CLOCK_REALTIME
, &tm
);
1936 fprintf(output
, "# started on %s\n", ctime(&tm
.tv_sec
));
1937 } else if (output_fd
> 0) {
1938 mode
= append_file
? "a" : "w";
1939 output
= fdopen(output_fd
, mode
);
1941 perror("Failed opening logfd");
1946 stat_config
.output
= output
;
1949 * let the spreadsheet do the pretty-printing
1952 /* User explicitly passed -B? */
1953 if (big_num_opt
== 1) {
1954 fprintf(stderr
, "-B option not supported with -x\n");
1955 parse_options_usage(stat_usage
, stat_options
, "B", 1);
1956 parse_options_usage(NULL
, stat_options
, "x", 1);
1958 } else /* Nope, so disable big number formatting */
1960 } else if (big_num_opt
== 0) /* User passed --no-big-num */
1963 if (!argc
&& target__none(&target
))
1964 usage_with_options(stat_usage
, stat_options
);
1966 if (run_count
< 0) {
1967 pr_err("Run count must be a positive number\n");
1968 parse_options_usage(stat_usage
, stat_options
, "r", 1);
1970 } else if (run_count
== 0) {
1975 if ((stat_config
.aggr_mode
== AGGR_THREAD
) && !target__has_task(&target
)) {
1976 fprintf(stderr
, "The --per-thread option is only available "
1977 "when monitoring via -p -t options.\n");
1978 parse_options_usage(NULL
, stat_options
, "p", 1);
1979 parse_options_usage(NULL
, stat_options
, "t", 1);
1984 * no_aggr, cgroup are for system-wide only
1985 * --per-thread is aggregated per thread, we dont mix it with cpu mode
1987 if (((stat_config
.aggr_mode
!= AGGR_GLOBAL
&&
1988 stat_config
.aggr_mode
!= AGGR_THREAD
) || nr_cgroups
) &&
1989 !target__has_cpu(&target
)) {
1990 fprintf(stderr
, "both cgroup and no-aggregation "
1991 "modes only available in system-wide mode\n");
1993 parse_options_usage(stat_usage
, stat_options
, "G", 1);
1994 parse_options_usage(NULL
, stat_options
, "A", 1);
1995 parse_options_usage(NULL
, stat_options
, "a", 1);
1999 if (add_default_attributes())
2002 target__validate(&target
);
2004 if (perf_evlist__create_maps(evsel_list
, &target
) < 0) {
2005 if (target__has_task(&target
)) {
2006 pr_err("Problems finding threads of monitor\n");
2007 parse_options_usage(stat_usage
, stat_options
, "p", 1);
2008 parse_options_usage(NULL
, stat_options
, "t", 1);
2009 } else if (target__has_cpu(&target
)) {
2010 perror("failed to parse CPUs map");
2011 parse_options_usage(stat_usage
, stat_options
, "C", 1);
2012 parse_options_usage(NULL
, stat_options
, "a", 1);
2018 * Initialize thread_map with comm names,
2019 * so we could print it out on output.
2021 if (stat_config
.aggr_mode
== AGGR_THREAD
)
2022 thread_map__read_comms(evsel_list
->threads
);
2024 if (interval
&& interval
< 100) {
2025 if (interval
< 10) {
2026 pr_err("print interval must be >= 10ms\n");
2027 parse_options_usage(stat_usage
, stat_options
, "I", 1);
2030 pr_warning("print interval < 100ms. "
2031 "The overhead percentage could be high in some cases. "
2032 "Please proceed with caution.\n");
2035 if (perf_evlist__alloc_stats(evsel_list
, interval
))
2038 if (perf_stat_init_aggr_mode())
2042 * We dont want to block the signals - that would cause
2043 * child tasks to inherit that and Ctrl-C would not work.
2044 * What we want is for Ctrl-C to work in the exec()-ed
2045 * task, but being ignored by perf stat itself:
2049 signal(SIGINT
, skip_signal
);
2050 signal(SIGCHLD
, skip_signal
);
2051 signal(SIGALRM
, skip_signal
);
2052 signal(SIGABRT
, skip_signal
);
2055 for (run_idx
= 0; forever
|| run_idx
< run_count
; run_idx
++) {
2056 if (run_count
!= 1 && verbose
)
2057 fprintf(output
, "[ perf stat: executing run #%d ... ]\n",
2060 status
= run_perf_stat(argc
, argv
);
2061 if (forever
&& status
!= -1) {
2062 print_counters(NULL
, argc
, argv
);
2063 perf_stat__reset_stats();
2067 if (!forever
&& status
!= -1 && !interval
)
2068 print_counters(NULL
, argc
, argv
);
2072 * We synthesize the kernel mmap record just so that older tools
2073 * don't emit warnings about not being able to resolve symbols
2074 * due to /proc/sys/kernel/kptr_restrict settings and instear provide
2075 * a saner message about no samples being in the perf.data file.
2077 * This also serves to suppress a warning about f_header.data.size == 0
2078 * in header.c at the moment 'perf stat record' gets introduced, which
2079 * is not really needed once we start adding the stat specific PERF_RECORD_
2080 * records, but the need to suppress the kptr_restrict messages in older
2081 * tools remain -acme
2083 int fd
= perf_data_file__fd(&perf_stat
.file
);
2084 int err
= perf_event__synthesize_kernel_mmap((void *)&perf_stat
,
2085 process_synthesized_event
,
2086 &perf_stat
.session
->machines
.host
);
2088 pr_warning("Couldn't synthesize the kernel mmap record, harmless, "
2089 "older tools may produce warnings about this file\n.");
2093 if (WRITE_STAT_ROUND_EVENT(walltime_nsecs_stats
.max
, FINAL
))
2094 pr_err("failed to write stat round event\n");
2097 if (!perf_stat
.file
.is_pipe
) {
2098 perf_stat
.session
->header
.data_size
+= perf_stat
.bytes_written
;
2099 perf_session__write_header(perf_stat
.session
, evsel_list
, fd
, true);
2102 perf_session__delete(perf_stat
.session
);
2105 perf_stat__exit_aggr_mode();
2106 perf_evlist__free_stats(evsel_list
);
2108 perf_evlist__delete(evsel_list
);