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/drv_configs.h"
56 #include "util/color.h"
57 #include "util/stat.h"
58 #include "util/header.h"
59 #include "util/cpumap.h"
60 #include "util/thread.h"
61 #include "util/thread_map.h"
62 #include "util/counts.h"
63 #include "util/group.h"
64 #include "util/session.h"
65 #include "util/tool.h"
66 #include "util/group.h"
69 #include <linux/time64.h>
70 #include <api/fs/fs.h>
72 #include <sys/prctl.h>
76 #define DEFAULT_SEPARATOR " "
77 #define CNTR_NOT_SUPPORTED "<not supported>"
78 #define CNTR_NOT_COUNTED "<not counted>"
80 static void print_counters(struct timespec
*ts
, int argc
, const char **argv
);
82 /* Default events used for perf stat -T */
83 static const char *transaction_attrs
= {
95 /* More limited version when the CPU does not have all events. */
96 static const char * transaction_limited_attrs
= {
106 static const char * topdown_attrs
[] = {
107 "topdown-total-slots",
108 "topdown-slots-retired",
109 "topdown-recovery-bubbles",
110 "topdown-fetch-bubbles",
111 "topdown-slots-issued",
115 static struct perf_evlist
*evsel_list
;
117 static struct target target
= {
121 typedef int (*aggr_get_id_t
)(struct cpu_map
*m
, int cpu
);
123 static int run_count
= 1;
124 static bool no_inherit
= false;
125 static volatile pid_t child_pid
= -1;
126 static bool null_run
= false;
127 static int detailed_run
= 0;
128 static bool transaction_run
;
129 static bool topdown_run
= false;
130 static bool big_num
= true;
131 static int big_num_opt
= -1;
132 static const char *csv_sep
= NULL
;
133 static bool csv_output
= false;
134 static bool group
= false;
135 static const char *pre_cmd
= NULL
;
136 static const char *post_cmd
= NULL
;
137 static bool sync_run
= false;
138 static unsigned int initial_delay
= 0;
139 static unsigned int unit_width
= 4; /* strlen("unit") */
140 static bool forever
= false;
141 static bool metric_only
= false;
142 static bool force_metric_only
= false;
143 static bool no_merge
= false;
144 static struct timespec ref_time
;
145 static struct cpu_map
*aggr_map
;
146 static aggr_get_id_t aggr_get_id
;
147 static bool append_file
;
148 static const char *output_name
;
149 static int output_fd
;
150 static int print_free_counters_hint
;
154 struct perf_data_file file
;
155 struct perf_session
*session
;
157 struct perf_tool tool
;
159 struct cpu_map
*cpus
;
160 struct thread_map
*threads
;
161 enum aggr_mode aggr_mode
;
164 static struct perf_stat perf_stat
;
165 #define STAT_RECORD perf_stat.record
167 static volatile int done
= 0;
169 static struct perf_stat_config stat_config
= {
170 .aggr_mode
= AGGR_GLOBAL
,
174 static inline void diff_timespec(struct timespec
*r
, struct timespec
*a
,
177 r
->tv_sec
= a
->tv_sec
- b
->tv_sec
;
178 if (a
->tv_nsec
< b
->tv_nsec
) {
179 r
->tv_nsec
= a
->tv_nsec
+ NSEC_PER_SEC
- b
->tv_nsec
;
182 r
->tv_nsec
= a
->tv_nsec
- b
->tv_nsec
;
186 static void perf_stat__reset_stats(void)
188 perf_evlist__reset_stats(evsel_list
);
189 perf_stat__reset_shadow_stats();
192 static int create_perf_stat_counter(struct perf_evsel
*evsel
)
194 struct perf_event_attr
*attr
= &evsel
->attr
;
196 if (stat_config
.scale
)
197 attr
->read_format
= PERF_FORMAT_TOTAL_TIME_ENABLED
|
198 PERF_FORMAT_TOTAL_TIME_RUNNING
;
200 attr
->inherit
= !no_inherit
;
203 * Some events get initialized with sample_(period/type) set,
204 * like tracepoints. Clear it up for counting.
206 attr
->sample_period
= 0;
209 * But set sample_type to PERF_SAMPLE_IDENTIFIER, which should be harmless
210 * while avoiding that older tools show confusing messages.
212 * However for pipe sessions we need to keep it zero,
213 * because script's perf_evsel__check_attr is triggered
214 * by attr->sample_type != 0, and we can't run it on
217 if (!(STAT_RECORD
&& perf_stat
.file
.is_pipe
))
218 attr
->sample_type
= PERF_SAMPLE_IDENTIFIER
;
221 * Disabling all counters initially, they will be enabled
222 * either manually by us or by kernel via enable_on_exec
225 if (perf_evsel__is_group_leader(evsel
)) {
229 * In case of initial_delay we enable tracee
232 if (target__none(&target
) && !initial_delay
)
233 attr
->enable_on_exec
= 1;
236 if (target__has_cpu(&target
))
237 return perf_evsel__open_per_cpu(evsel
, perf_evsel__cpus(evsel
));
239 return perf_evsel__open_per_thread(evsel
, evsel_list
->threads
);
243 * Does the counter have nsecs as a unit?
245 static inline int nsec_counter(struct perf_evsel
*evsel
)
247 if (perf_evsel__match(evsel
, SOFTWARE
, SW_CPU_CLOCK
) ||
248 perf_evsel__match(evsel
, SOFTWARE
, SW_TASK_CLOCK
))
254 static int process_synthesized_event(struct perf_tool
*tool __maybe_unused
,
255 union perf_event
*event
,
256 struct perf_sample
*sample __maybe_unused
,
257 struct machine
*machine __maybe_unused
)
259 if (perf_data_file__write(&perf_stat
.file
, event
, event
->header
.size
) < 0) {
260 pr_err("failed to write perf data, error: %m\n");
264 perf_stat
.bytes_written
+= event
->header
.size
;
268 static int write_stat_round_event(u64 tm
, u64 type
)
270 return perf_event__synthesize_stat_round(NULL
, tm
, type
,
271 process_synthesized_event
,
275 #define WRITE_STAT_ROUND_EVENT(time, interval) \
276 write_stat_round_event(time, PERF_STAT_ROUND_TYPE__ ## interval)
278 #define SID(e, x, y) xyarray__entry(e->sample_id, x, y)
281 perf_evsel__write_stat_event(struct perf_evsel
*counter
, u32 cpu
, u32 thread
,
282 struct perf_counts_values
*count
)
284 struct perf_sample_id
*sid
= SID(counter
, cpu
, thread
);
286 return perf_event__synthesize_stat(NULL
, cpu
, thread
, sid
->id
, count
,
287 process_synthesized_event
, NULL
);
291 * Read out the results of a single counter:
292 * do not aggregate counts across CPUs in system-wide mode
294 static int read_counter(struct perf_evsel
*counter
)
296 int nthreads
= thread_map__nr(evsel_list
->threads
);
297 int ncpus
, cpu
, thread
;
299 if (target__has_cpu(&target
))
300 ncpus
= perf_evsel__nr_cpus(counter
);
304 if (!counter
->supported
)
307 if (counter
->system_wide
)
310 for (thread
= 0; thread
< nthreads
; thread
++) {
311 for (cpu
= 0; cpu
< ncpus
; cpu
++) {
312 struct perf_counts_values
*count
;
314 count
= perf_counts(counter
->counts
, cpu
, thread
);
315 if (perf_evsel__read(counter
, cpu
, thread
, count
))
319 if (perf_evsel__write_stat_event(counter
, cpu
, thread
, count
)) {
320 pr_err("failed to write stat event\n");
326 fprintf(stat_config
.output
,
327 "%s: %d: %" PRIu64
" %" PRIu64
" %" PRIu64
"\n",
328 perf_evsel__name(counter
),
330 count
->val
, count
->ena
, count
->run
);
338 static void read_counters(void)
340 struct perf_evsel
*counter
;
342 evlist__for_each_entry(evsel_list
, counter
) {
343 if (read_counter(counter
))
344 pr_debug("failed to read counter %s\n", counter
->name
);
346 if (perf_stat_process_counter(&stat_config
, counter
))
347 pr_warning("failed to process counter %s\n", counter
->name
);
351 static void process_interval(void)
353 struct timespec ts
, rs
;
357 clock_gettime(CLOCK_MONOTONIC
, &ts
);
358 diff_timespec(&rs
, &ts
, &ref_time
);
361 if (WRITE_STAT_ROUND_EVENT(rs
.tv_sec
* NSEC_PER_SEC
+ rs
.tv_nsec
, INTERVAL
))
362 pr_err("failed to write stat round event\n");
365 print_counters(&rs
, 0, NULL
);
368 static void enable_counters(void)
371 usleep(initial_delay
* USEC_PER_MSEC
);
374 * We need to enable counters only if:
375 * - we don't have tracee (attaching to task or cpu)
376 * - we have initial delay configured
378 if (!target__none(&target
) || initial_delay
)
379 perf_evlist__enable(evsel_list
);
382 static void disable_counters(void)
385 * If we don't have tracee (attaching to task or cpu), counters may
386 * still be running. To get accurate group ratios, we must stop groups
387 * from counting before reading their constituent counters.
389 if (!target__none(&target
))
390 perf_evlist__disable(evsel_list
);
393 static volatile int workload_exec_errno
;
396 * perf_evlist__prepare_workload will send a SIGUSR1
397 * if the fork fails, since we asked by setting its
398 * want_signal to true.
400 static void workload_exec_failed_signal(int signo __maybe_unused
, siginfo_t
*info
,
401 void *ucontext __maybe_unused
)
403 workload_exec_errno
= info
->si_value
.sival_int
;
406 static bool has_unit(struct perf_evsel
*counter
)
408 return counter
->unit
&& *counter
->unit
;
411 static bool has_scale(struct perf_evsel
*counter
)
413 return counter
->scale
!= 1;
416 static int perf_stat_synthesize_config(bool is_pipe
)
418 struct perf_evsel
*counter
;
422 err
= perf_event__synthesize_attrs(NULL
, perf_stat
.session
,
423 process_synthesized_event
);
425 pr_err("Couldn't synthesize attrs.\n");
431 * Synthesize other events stuff not carried within
432 * attr event - unit, scale, name
434 evlist__for_each_entry(evsel_list
, counter
) {
435 if (!counter
->supported
)
439 * Synthesize unit and scale only if it's defined.
441 if (has_unit(counter
)) {
442 err
= perf_event__synthesize_event_update_unit(NULL
, counter
, process_synthesized_event
);
444 pr_err("Couldn't synthesize evsel unit.\n");
449 if (has_scale(counter
)) {
450 err
= perf_event__synthesize_event_update_scale(NULL
, counter
, process_synthesized_event
);
452 pr_err("Couldn't synthesize evsel scale.\n");
457 if (counter
->own_cpus
) {
458 err
= perf_event__synthesize_event_update_cpus(NULL
, counter
, process_synthesized_event
);
460 pr_err("Couldn't synthesize evsel scale.\n");
466 * Name is needed only for pipe output,
467 * perf.data carries event names.
470 err
= perf_event__synthesize_event_update_name(NULL
, counter
, process_synthesized_event
);
472 pr_err("Couldn't synthesize evsel name.\n");
478 err
= perf_event__synthesize_thread_map2(NULL
, evsel_list
->threads
,
479 process_synthesized_event
,
482 pr_err("Couldn't synthesize thread map.\n");
486 err
= perf_event__synthesize_cpu_map(NULL
, evsel_list
->cpus
,
487 process_synthesized_event
, NULL
);
489 pr_err("Couldn't synthesize thread map.\n");
493 err
= perf_event__synthesize_stat_config(NULL
, &stat_config
,
494 process_synthesized_event
, NULL
);
496 pr_err("Couldn't synthesize config.\n");
503 #define FD(e, x, y) (*(int *)xyarray__entry(e->fd, x, y))
505 static int __store_counter_ids(struct perf_evsel
*counter
,
506 struct cpu_map
*cpus
,
507 struct thread_map
*threads
)
511 for (cpu
= 0; cpu
< cpus
->nr
; cpu
++) {
512 for (thread
= 0; thread
< threads
->nr
; thread
++) {
513 int fd
= FD(counter
, cpu
, thread
);
515 if (perf_evlist__id_add_fd(evsel_list
, counter
,
516 cpu
, thread
, fd
) < 0)
524 static int store_counter_ids(struct perf_evsel
*counter
)
526 struct cpu_map
*cpus
= counter
->cpus
;
527 struct thread_map
*threads
= counter
->threads
;
529 if (perf_evsel__alloc_id(counter
, cpus
->nr
, threads
->nr
))
532 return __store_counter_ids(counter
, cpus
, threads
);
535 static int __run_perf_stat(int argc
, const char **argv
)
537 int interval
= stat_config
.interval
;
539 unsigned long long t0
, t1
;
540 struct perf_evsel
*counter
;
544 const bool forks
= (argc
> 0);
545 bool is_pipe
= STAT_RECORD
? perf_stat
.file
.is_pipe
: false;
546 struct perf_evsel_config_term
*err_term
;
549 ts
.tv_sec
= interval
/ USEC_PER_MSEC
;
550 ts
.tv_nsec
= (interval
% USEC_PER_MSEC
) * NSEC_PER_MSEC
;
557 if (perf_evlist__prepare_workload(evsel_list
, &target
, argv
, is_pipe
,
558 workload_exec_failed_signal
) < 0) {
559 perror("failed to prepare workload");
562 child_pid
= evsel_list
->workload
.pid
;
566 perf_evlist__set_leader(evsel_list
);
568 evlist__for_each_entry(evsel_list
, counter
) {
570 if (create_perf_stat_counter(counter
) < 0) {
572 * PPC returns ENXIO for HW counters until 2.6.37
573 * (behavior changed with commit b0a873e).
575 if (errno
== EINVAL
|| errno
== ENOSYS
||
576 errno
== ENOENT
|| errno
== EOPNOTSUPP
||
579 ui__warning("%s event is not supported by the kernel.\n",
580 perf_evsel__name(counter
));
581 counter
->supported
= false;
583 if ((counter
->leader
!= counter
) ||
584 !(counter
->leader
->nr_members
> 1))
586 } else if (perf_evsel__fallback(counter
, errno
, msg
, sizeof(msg
))) {
588 ui__warning("%s\n", msg
);
592 perf_evsel__open_strerror(counter
, &target
,
593 errno
, msg
, sizeof(msg
));
594 ui__error("%s\n", msg
);
597 kill(child_pid
, SIGTERM
);
601 counter
->supported
= true;
603 l
= strlen(counter
->unit
);
607 if (STAT_RECORD
&& store_counter_ids(counter
))
611 if (perf_evlist__apply_filters(evsel_list
, &counter
)) {
612 error("failed to set filter \"%s\" on event %s with %d (%s)\n",
613 counter
->filter
, perf_evsel__name(counter
), errno
,
614 str_error_r(errno
, msg
, sizeof(msg
)));
618 if (perf_evlist__apply_drv_configs(evsel_list
, &counter
, &err_term
)) {
619 error("failed to set config \"%s\" on event %s with %d (%s)\n",
620 err_term
->val
.drv_cfg
, perf_evsel__name(counter
), errno
,
621 str_error_r(errno
, msg
, sizeof(msg
)));
626 int err
, fd
= perf_data_file__fd(&perf_stat
.file
);
629 err
= perf_header__write_pipe(perf_data_file__fd(&perf_stat
.file
));
631 err
= perf_session__write_header(perf_stat
.session
, evsel_list
,
638 err
= perf_stat_synthesize_config(is_pipe
);
644 * Enable counters and exec the command:
647 clock_gettime(CLOCK_MONOTONIC
, &ref_time
);
650 perf_evlist__start_workload(evsel_list
);
654 while (!waitpid(child_pid
, &status
, WNOHANG
)) {
655 nanosleep(&ts
, NULL
);
661 if (workload_exec_errno
) {
662 const char *emsg
= str_error_r(workload_exec_errno
, msg
, sizeof(msg
));
663 pr_err("Workload failed: %s\n", emsg
);
667 if (WIFSIGNALED(status
))
668 psignal(WTERMSIG(status
), argv
[0]);
672 nanosleep(&ts
, NULL
);
682 update_stats(&walltime_nsecs_stats
, t1
- t0
);
685 * Closing a group leader splits the group, and as we only disable
686 * group leaders, results in remaining events becoming enabled. To
687 * avoid arbitrary skew, we must read all counters before closing any
691 perf_evlist__close(evsel_list
);
693 return WEXITSTATUS(status
);
696 static int run_perf_stat(int argc
, const char **argv
)
701 ret
= system(pre_cmd
);
709 ret
= __run_perf_stat(argc
, argv
);
714 ret
= system(post_cmd
);
722 static void print_running(u64 run
, u64 ena
)
725 fprintf(stat_config
.output
, "%s%" PRIu64
"%s%.2f",
729 ena
? 100.0 * run
/ ena
: 100.0);
730 } else if (run
!= ena
) {
731 fprintf(stat_config
.output
, " (%.2f%%)", 100.0 * run
/ ena
);
735 static void print_noise_pct(double total
, double avg
)
737 double pct
= rel_stddev_stats(total
, avg
);
740 fprintf(stat_config
.output
, "%s%.2f%%", csv_sep
, pct
);
742 fprintf(stat_config
.output
, " ( +-%6.2f%% )", pct
);
745 static void print_noise(struct perf_evsel
*evsel
, double avg
)
747 struct perf_stat_evsel
*ps
;
753 print_noise_pct(stddev_stats(&ps
->res_stats
[0]), avg
);
756 static void aggr_printout(struct perf_evsel
*evsel
, int id
, int nr
)
758 switch (stat_config
.aggr_mode
) {
760 fprintf(stat_config
.output
, "S%d-C%*d%s%*d%s",
761 cpu_map__id_to_socket(id
),
763 cpu_map__id_to_cpu(id
),
770 fprintf(stat_config
.output
, "S%*d%s%*d%s",
779 fprintf(stat_config
.output
, "CPU%*d%s",
781 perf_evsel__cpus(evsel
)->map
[id
], csv_sep
);
784 fprintf(stat_config
.output
, "%*s-%*d%s",
786 thread_map__comm(evsel
->threads
, id
),
788 thread_map__pid(evsel
->threads
, id
),
804 struct perf_evsel
*evsel
;
807 #define METRIC_LEN 35
809 static void new_line_std(void *ctx
)
811 struct outstate
*os
= ctx
;
816 static void do_new_line_std(struct outstate
*os
)
819 fputs(os
->prefix
, os
->fh
);
820 aggr_printout(os
->evsel
, os
->id
, os
->nr
);
821 if (stat_config
.aggr_mode
== AGGR_NONE
)
822 fprintf(os
->fh
, " ");
823 fprintf(os
->fh
, " ");
826 static void print_metric_std(void *ctx
, const char *color
, const char *fmt
,
827 const char *unit
, double val
)
829 struct outstate
*os
= ctx
;
832 bool newline
= os
->newline
;
836 if (unit
== NULL
|| fmt
== NULL
) {
837 fprintf(out
, "%-*s", METRIC_LEN
, "");
844 n
= fprintf(out
, " # ");
846 n
+= color_fprintf(out
, color
, fmt
, val
);
848 n
+= fprintf(out
, fmt
, val
);
849 fprintf(out
, " %-*s", METRIC_LEN
- n
- 1, unit
);
852 static void new_line_csv(void *ctx
)
854 struct outstate
*os
= ctx
;
859 fprintf(os
->fh
, "%s%s", os
->prefix
, csv_sep
);
860 aggr_printout(os
->evsel
, os
->id
, os
->nr
);
861 for (i
= 0; i
< os
->nfields
; i
++)
862 fputs(csv_sep
, os
->fh
);
865 static void print_metric_csv(void *ctx
,
866 const char *color __maybe_unused
,
867 const char *fmt
, const char *unit
, double val
)
869 struct outstate
*os
= ctx
;
871 char buf
[64], *vals
, *ends
;
873 if (unit
== NULL
|| fmt
== NULL
) {
874 fprintf(out
, "%s%s%s%s", csv_sep
, csv_sep
, csv_sep
, csv_sep
);
877 snprintf(buf
, sizeof(buf
), fmt
, val
);
879 while (isspace(*vals
))
882 while (isdigit(*ends
) || *ends
== '.')
885 while (isspace(*unit
))
887 fprintf(out
, "%s%s%s%s", csv_sep
, vals
, csv_sep
, unit
);
890 #define METRIC_ONLY_LEN 20
892 /* Filter out some columns that don't work well in metrics only mode */
894 static bool valid_only_metric(const char *unit
)
898 if (strstr(unit
, "/sec") ||
899 strstr(unit
, "hz") ||
900 strstr(unit
, "Hz") ||
901 strstr(unit
, "CPUs utilized"))
906 static const char *fixunit(char *buf
, struct perf_evsel
*evsel
,
909 if (!strncmp(unit
, "of all", 6)) {
910 snprintf(buf
, 1024, "%s %s", perf_evsel__name(evsel
),
917 static void print_metric_only(void *ctx
, const char *color
, const char *fmt
,
918 const char *unit
, double val
)
920 struct outstate
*os
= ctx
;
924 unsigned mlen
= METRIC_ONLY_LEN
;
926 if (!valid_only_metric(unit
))
928 unit
= fixunit(buf
, os
->evsel
, unit
);
930 n
= color_fprintf(out
, color
, fmt
, val
);
932 n
= fprintf(out
, fmt
, val
);
933 if (n
> METRIC_ONLY_LEN
)
935 if (mlen
< strlen(unit
))
936 mlen
= strlen(unit
) + 1;
937 fprintf(out
, "%*s", mlen
- n
, "");
940 static void print_metric_only_csv(void *ctx
, const char *color __maybe_unused
,
942 const char *unit
, double val
)
944 struct outstate
*os
= ctx
;
946 char buf
[64], *vals
, *ends
;
949 if (!valid_only_metric(unit
))
951 unit
= fixunit(tbuf
, os
->evsel
, unit
);
952 snprintf(buf
, sizeof buf
, fmt
, val
);
954 while (isspace(*vals
))
957 while (isdigit(*ends
) || *ends
== '.')
960 fprintf(out
, "%s%s", vals
, csv_sep
);
963 static void new_line_metric(void *ctx __maybe_unused
)
967 static void print_metric_header(void *ctx
, const char *color __maybe_unused
,
968 const char *fmt __maybe_unused
,
969 const char *unit
, double val __maybe_unused
)
971 struct outstate
*os
= ctx
;
974 if (!valid_only_metric(unit
))
976 unit
= fixunit(tbuf
, os
->evsel
, unit
);
978 fprintf(os
->fh
, "%s%s", unit
, csv_sep
);
980 fprintf(os
->fh
, "%-*s ", METRIC_ONLY_LEN
, unit
);
983 static void nsec_printout(int id
, int nr
, struct perf_evsel
*evsel
, double avg
)
985 FILE *output
= stat_config
.output
;
986 double msecs
= avg
/ NSEC_PER_MSEC
;
987 const char *fmt_v
, *fmt_n
;
990 fmt_v
= csv_output
? "%.6f%s" : "%18.6f%s";
991 fmt_n
= csv_output
? "%s" : "%-25s";
993 aggr_printout(evsel
, id
, nr
);
995 scnprintf(name
, sizeof(name
), "%s%s",
996 perf_evsel__name(evsel
), csv_output
? "" : " (msec)");
998 fprintf(output
, fmt_v
, msecs
, csv_sep
);
1001 fprintf(output
, "%s%s", evsel
->unit
, csv_sep
);
1003 fprintf(output
, "%-*s%s", unit_width
, evsel
->unit
, csv_sep
);
1005 fprintf(output
, fmt_n
, name
);
1008 fprintf(output
, "%s%s", csv_sep
, evsel
->cgrp
->name
);
1011 static int first_shadow_cpu(struct perf_evsel
*evsel
, int id
)
1018 if (stat_config
.aggr_mode
== AGGR_NONE
)
1021 if (stat_config
.aggr_mode
== AGGR_GLOBAL
)
1024 for (i
= 0; i
< perf_evsel__nr_cpus(evsel
); i
++) {
1025 int cpu2
= perf_evsel__cpus(evsel
)->map
[i
];
1027 if (aggr_get_id(evsel_list
->cpus
, cpu2
) == id
)
1033 static void abs_printout(int id
, int nr
, struct perf_evsel
*evsel
, double avg
)
1035 FILE *output
= stat_config
.output
;
1036 double sc
= evsel
->scale
;
1040 fmt
= floor(sc
) != sc
? "%.2f%s" : "%.0f%s";
1043 fmt
= floor(sc
) != sc
? "%'18.2f%s" : "%'18.0f%s";
1045 fmt
= floor(sc
) != sc
? "%18.2f%s" : "%18.0f%s";
1048 aggr_printout(evsel
, id
, nr
);
1050 fprintf(output
, fmt
, avg
, csv_sep
);
1053 fprintf(output
, "%-*s%s",
1054 csv_output
? 0 : unit_width
,
1055 evsel
->unit
, csv_sep
);
1057 fprintf(output
, "%-*s", csv_output
? 0 : 25, perf_evsel__name(evsel
));
1060 fprintf(output
, "%s%s", csv_sep
, evsel
->cgrp
->name
);
1063 static void printout(int id
, int nr
, struct perf_evsel
*counter
, double uval
,
1064 char *prefix
, u64 run
, u64 ena
, double noise
)
1066 struct perf_stat_output_ctx out
;
1067 struct outstate os
= {
1068 .fh
= stat_config
.output
,
1069 .prefix
= prefix
? prefix
: "",
1074 print_metric_t pm
= print_metric_std
;
1078 nl
= new_line_metric
;
1080 pm
= print_metric_only_csv
;
1082 pm
= print_metric_only
;
1086 if (csv_output
&& !metric_only
) {
1087 static int aggr_fields
[] = {
1095 pm
= print_metric_csv
;
1098 os
.nfields
+= aggr_fields
[stat_config
.aggr_mode
];
1102 if (run
== 0 || ena
== 0 || counter
->counts
->scaled
== -1) {
1104 pm(&os
, NULL
, "", "", 0);
1107 aggr_printout(counter
, id
, nr
);
1109 fprintf(stat_config
.output
, "%*s%s",
1110 csv_output
? 0 : 18,
1111 counter
->supported
? CNTR_NOT_COUNTED
: CNTR_NOT_SUPPORTED
,
1114 if (counter
->supported
)
1115 print_free_counters_hint
= 1;
1117 fprintf(stat_config
.output
, "%-*s%s",
1118 csv_output
? 0 : unit_width
,
1119 counter
->unit
, csv_sep
);
1121 fprintf(stat_config
.output
, "%*s",
1122 csv_output
? 0 : -25,
1123 perf_evsel__name(counter
));
1126 fprintf(stat_config
.output
, "%s%s",
1127 csv_sep
, counter
->cgrp
->name
);
1130 pm(&os
, NULL
, NULL
, "", 0);
1131 print_noise(counter
, noise
);
1132 print_running(run
, ena
);
1134 pm(&os
, NULL
, NULL
, "", 0);
1140 else if (nsec_counter(counter
))
1141 nsec_printout(id
, nr
, counter
, uval
);
1143 abs_printout(id
, nr
, counter
, uval
);
1145 out
.print_metric
= pm
;
1149 if (csv_output
&& !metric_only
) {
1150 print_noise(counter
, noise
);
1151 print_running(run
, ena
);
1154 perf_stat__print_shadow_stats(counter
, uval
,
1155 first_shadow_cpu(counter
, id
),
1157 if (!csv_output
&& !metric_only
) {
1158 print_noise(counter
, noise
);
1159 print_running(run
, ena
);
1163 static void aggr_update_shadow(void)
1167 struct perf_evsel
*counter
;
1169 for (s
= 0; s
< aggr_map
->nr
; s
++) {
1170 id
= aggr_map
->map
[s
];
1171 evlist__for_each_entry(evsel_list
, counter
) {
1173 for (cpu
= 0; cpu
< perf_evsel__nr_cpus(counter
); cpu
++) {
1174 s2
= aggr_get_id(evsel_list
->cpus
, cpu
);
1177 val
+= perf_counts(counter
->counts
, cpu
, 0)->val
;
1179 val
= val
* counter
->scale
;
1180 perf_stat__update_shadow_stats(counter
, &val
,
1181 first_shadow_cpu(counter
, id
));
1186 static void collect_all_aliases(struct perf_evsel
*counter
,
1187 void (*cb
)(struct perf_evsel
*counter
, void *data
,
1191 struct perf_evsel
*alias
;
1193 alias
= list_prepare_entry(counter
, &(evsel_list
->entries
), node
);
1194 list_for_each_entry_continue (alias
, &evsel_list
->entries
, node
) {
1195 if (strcmp(perf_evsel__name(alias
), perf_evsel__name(counter
)) ||
1196 alias
->scale
!= counter
->scale
||
1197 alias
->cgrp
!= counter
->cgrp
||
1198 strcmp(alias
->unit
, counter
->unit
) ||
1199 nsec_counter(alias
) != nsec_counter(counter
))
1201 alias
->merged_stat
= true;
1202 cb(alias
, data
, false);
1206 static bool collect_data(struct perf_evsel
*counter
,
1207 void (*cb
)(struct perf_evsel
*counter
, void *data
,
1211 if (counter
->merged_stat
)
1213 cb(counter
, data
, true);
1215 collect_all_aliases(counter
, cb
, data
);
1226 static void aggr_cb(struct perf_evsel
*counter
, void *data
, bool first
)
1228 struct aggr_data
*ad
= data
;
1231 for (cpu
= 0; cpu
< perf_evsel__nr_cpus(counter
); cpu
++) {
1232 struct perf_counts_values
*counts
;
1234 s2
= aggr_get_id(perf_evsel__cpus(counter
), cpu
);
1239 counts
= perf_counts(counter
->counts
, cpu
, 0);
1240 ad
->val
+= counts
->val
;
1241 ad
->ena
+= counts
->ena
;
1242 ad
->run
+= counts
->run
;
1246 static void print_aggr(char *prefix
)
1248 FILE *output
= stat_config
.output
;
1249 struct perf_evsel
*counter
;
1255 if (!(aggr_map
|| aggr_get_id
))
1258 aggr_update_shadow();
1261 * With metric_only everything is on a single line.
1262 * Without each counter has its own line.
1264 for (s
= 0; s
< aggr_map
->nr
; s
++) {
1265 struct aggr_data ad
;
1266 if (prefix
&& metric_only
)
1267 fprintf(output
, "%s", prefix
);
1269 ad
.id
= id
= aggr_map
->map
[s
];
1271 evlist__for_each_entry(evsel_list
, counter
) {
1272 ad
.val
= ad
.ena
= ad
.run
= 0;
1274 if (!collect_data(counter
, aggr_cb
, &ad
))
1280 if (first
&& metric_only
) {
1282 aggr_printout(counter
, id
, nr
);
1284 if (prefix
&& !metric_only
)
1285 fprintf(output
, "%s", prefix
);
1287 uval
= val
* counter
->scale
;
1288 printout(id
, nr
, counter
, uval
, prefix
, run
, ena
, 1.0);
1290 fputc('\n', output
);
1293 fputc('\n', output
);
1297 static void print_aggr_thread(struct perf_evsel
*counter
, char *prefix
)
1299 FILE *output
= stat_config
.output
;
1300 int nthreads
= thread_map__nr(counter
->threads
);
1301 int ncpus
= cpu_map__nr(counter
->cpus
);
1305 for (thread
= 0; thread
< nthreads
; thread
++) {
1306 u64 ena
= 0, run
= 0, val
= 0;
1308 for (cpu
= 0; cpu
< ncpus
; cpu
++) {
1309 val
+= perf_counts(counter
->counts
, cpu
, thread
)->val
;
1310 ena
+= perf_counts(counter
->counts
, cpu
, thread
)->ena
;
1311 run
+= perf_counts(counter
->counts
, cpu
, thread
)->run
;
1315 fprintf(output
, "%s", prefix
);
1317 uval
= val
* counter
->scale
;
1318 printout(thread
, 0, counter
, uval
, prefix
, run
, ena
, 1.0);
1319 fputc('\n', output
);
1324 double avg
, avg_enabled
, avg_running
;
1327 static void counter_aggr_cb(struct perf_evsel
*counter
, void *data
,
1328 bool first __maybe_unused
)
1330 struct caggr_data
*cd
= data
;
1331 struct perf_stat_evsel
*ps
= counter
->priv
;
1333 cd
->avg
+= avg_stats(&ps
->res_stats
[0]);
1334 cd
->avg_enabled
+= avg_stats(&ps
->res_stats
[1]);
1335 cd
->avg_running
+= avg_stats(&ps
->res_stats
[2]);
1339 * Print out the results of a single counter:
1340 * aggregated counts in system-wide mode
1342 static void print_counter_aggr(struct perf_evsel
*counter
, char *prefix
)
1344 FILE *output
= stat_config
.output
;
1346 struct caggr_data cd
= { .avg
= 0.0 };
1348 if (!collect_data(counter
, counter_aggr_cb
, &cd
))
1351 if (prefix
&& !metric_only
)
1352 fprintf(output
, "%s", prefix
);
1354 uval
= cd
.avg
* counter
->scale
;
1355 printout(-1, 0, counter
, uval
, prefix
, cd
.avg_running
, cd
.avg_enabled
, cd
.avg
);
1357 fprintf(output
, "\n");
1360 static void counter_cb(struct perf_evsel
*counter
, void *data
,
1361 bool first __maybe_unused
)
1363 struct aggr_data
*ad
= data
;
1365 ad
->val
+= perf_counts(counter
->counts
, ad
->cpu
, 0)->val
;
1366 ad
->ena
+= perf_counts(counter
->counts
, ad
->cpu
, 0)->ena
;
1367 ad
->run
+= perf_counts(counter
->counts
, ad
->cpu
, 0)->run
;
1371 * Print out the results of a single counter:
1372 * does not use aggregated count in system-wide
1374 static void print_counter(struct perf_evsel
*counter
, char *prefix
)
1376 FILE *output
= stat_config
.output
;
1381 for (cpu
= 0; cpu
< perf_evsel__nr_cpus(counter
); cpu
++) {
1382 struct aggr_data ad
= { .cpu
= cpu
};
1384 if (!collect_data(counter
, counter_cb
, &ad
))
1391 fprintf(output
, "%s", prefix
);
1393 uval
= val
* counter
->scale
;
1394 printout(cpu
, 0, counter
, uval
, prefix
, run
, ena
, 1.0);
1396 fputc('\n', output
);
1400 static void print_no_aggr_metric(char *prefix
)
1404 struct perf_evsel
*counter
;
1408 nrcpus
= evsel_list
->cpus
->nr
;
1409 for (cpu
= 0; cpu
< nrcpus
; cpu
++) {
1413 fputs(prefix
, stat_config
.output
);
1414 evlist__for_each_entry(evsel_list
, counter
) {
1416 aggr_printout(counter
, cpu
, 0);
1419 val
= perf_counts(counter
->counts
, cpu
, 0)->val
;
1420 ena
= perf_counts(counter
->counts
, cpu
, 0)->ena
;
1421 run
= perf_counts(counter
->counts
, cpu
, 0)->run
;
1423 uval
= val
* counter
->scale
;
1424 printout(cpu
, 0, counter
, uval
, prefix
, run
, ena
, 1.0);
1426 fputc('\n', stat_config
.output
);
1430 static int aggr_header_lens
[] = {
1438 static const char *aggr_header_csv
[] = {
1439 [AGGR_CORE
] = "core,cpus,",
1440 [AGGR_SOCKET
] = "socket,cpus",
1441 [AGGR_NONE
] = "cpu,",
1442 [AGGR_THREAD
] = "comm-pid,",
1446 static void print_metric_headers(const char *prefix
, bool no_indent
)
1448 struct perf_stat_output_ctx out
;
1449 struct perf_evsel
*counter
;
1450 struct outstate os
= {
1451 .fh
= stat_config
.output
1455 fprintf(stat_config
.output
, "%s", prefix
);
1457 if (!csv_output
&& !no_indent
)
1458 fprintf(stat_config
.output
, "%*s",
1459 aggr_header_lens
[stat_config
.aggr_mode
], "");
1461 if (stat_config
.interval
)
1462 fputs("time,", stat_config
.output
);
1463 fputs(aggr_header_csv
[stat_config
.aggr_mode
],
1464 stat_config
.output
);
1467 /* Print metrics headers only */
1468 evlist__for_each_entry(evsel_list
, counter
) {
1471 out
.print_metric
= print_metric_header
;
1472 out
.new_line
= new_line_metric
;
1474 perf_stat__print_shadow_stats(counter
, 0,
1478 fputc('\n', stat_config
.output
);
1481 static void print_interval(char *prefix
, struct timespec
*ts
)
1483 FILE *output
= stat_config
.output
;
1484 static int num_print_interval
;
1486 sprintf(prefix
, "%6lu.%09lu%s", ts
->tv_sec
, ts
->tv_nsec
, csv_sep
);
1488 if (num_print_interval
== 0 && !csv_output
) {
1489 switch (stat_config
.aggr_mode
) {
1491 fprintf(output
, "# time socket cpus");
1493 fprintf(output
, " counts %*s events\n", unit_width
, "unit");
1496 fprintf(output
, "# time core cpus");
1498 fprintf(output
, " counts %*s events\n", unit_width
, "unit");
1501 fprintf(output
, "# time CPU");
1503 fprintf(output
, " counts %*s events\n", unit_width
, "unit");
1506 fprintf(output
, "# time comm-pid");
1508 fprintf(output
, " counts %*s events\n", unit_width
, "unit");
1512 fprintf(output
, "# time");
1514 fprintf(output
, " counts %*s events\n", unit_width
, "unit");
1520 if (num_print_interval
== 0 && metric_only
)
1521 print_metric_headers(" ", true);
1522 if (++num_print_interval
== 25)
1523 num_print_interval
= 0;
1526 static void print_header(int argc
, const char **argv
)
1528 FILE *output
= stat_config
.output
;
1534 fprintf(output
, "\n");
1535 fprintf(output
, " Performance counter stats for ");
1536 if (target
.system_wide
)
1537 fprintf(output
, "\'system wide");
1538 else if (target
.cpu_list
)
1539 fprintf(output
, "\'CPU(s) %s", target
.cpu_list
);
1540 else if (!target__has_task(&target
)) {
1541 fprintf(output
, "\'%s", argv
? argv
[0] : "pipe");
1542 for (i
= 1; argv
&& (i
< argc
); i
++)
1543 fprintf(output
, " %s", argv
[i
]);
1544 } else if (target
.pid
)
1545 fprintf(output
, "process id \'%s", target
.pid
);
1547 fprintf(output
, "thread id \'%s", target
.tid
);
1549 fprintf(output
, "\'");
1551 fprintf(output
, " (%d runs)", run_count
);
1552 fprintf(output
, ":\n\n");
1556 static void print_footer(void)
1558 FILE *output
= stat_config
.output
;
1561 fprintf(output
, "\n");
1562 fprintf(output
, " %17.9f seconds time elapsed",
1563 avg_stats(&walltime_nsecs_stats
) / NSEC_PER_SEC
);
1564 if (run_count
> 1) {
1565 fprintf(output
, " ");
1566 print_noise_pct(stddev_stats(&walltime_nsecs_stats
),
1567 avg_stats(&walltime_nsecs_stats
));
1569 fprintf(output
, "\n\n");
1571 if (print_free_counters_hint
)
1573 "Some events weren't counted. Try disabling the NMI watchdog:\n"
1574 " echo 0 > /proc/sys/kernel/nmi_watchdog\n"
1576 " echo 1 > /proc/sys/kernel/nmi_watchdog\n");
1579 static void print_counters(struct timespec
*ts
, int argc
, const char **argv
)
1581 int interval
= stat_config
.interval
;
1582 struct perf_evsel
*counter
;
1583 char buf
[64], *prefix
= NULL
;
1585 /* Do not print anything if we record to the pipe. */
1586 if (STAT_RECORD
&& perf_stat
.file
.is_pipe
)
1590 print_interval(prefix
= buf
, ts
);
1592 print_header(argc
, argv
);
1595 static int num_print_iv
;
1597 if (num_print_iv
== 0 && !interval
)
1598 print_metric_headers(prefix
, false);
1599 if (num_print_iv
++ == 25)
1601 if (stat_config
.aggr_mode
== AGGR_GLOBAL
&& prefix
)
1602 fprintf(stat_config
.output
, "%s", prefix
);
1605 switch (stat_config
.aggr_mode
) {
1611 evlist__for_each_entry(evsel_list
, counter
)
1612 print_aggr_thread(counter
, prefix
);
1615 evlist__for_each_entry(evsel_list
, counter
)
1616 print_counter_aggr(counter
, prefix
);
1618 fputc('\n', stat_config
.output
);
1622 print_no_aggr_metric(prefix
);
1624 evlist__for_each_entry(evsel_list
, counter
)
1625 print_counter(counter
, prefix
);
1633 if (!interval
&& !csv_output
)
1636 fflush(stat_config
.output
);
1639 static volatile int signr
= -1;
1641 static void skip_signal(int signo
)
1643 if ((child_pid
== -1) || stat_config
.interval
)
1648 * render child_pid harmless
1649 * won't send SIGTERM to a random
1650 * process in case of race condition
1651 * and fast PID recycling
1656 static void sig_atexit(void)
1661 * avoid race condition with SIGCHLD handler
1662 * in skip_signal() which is modifying child_pid
1663 * goal is to avoid send SIGTERM to a random
1667 sigaddset(&set
, SIGCHLD
);
1668 sigprocmask(SIG_BLOCK
, &set
, &oset
);
1670 if (child_pid
!= -1)
1671 kill(child_pid
, SIGTERM
);
1673 sigprocmask(SIG_SETMASK
, &oset
, NULL
);
1678 signal(signr
, SIG_DFL
);
1679 kill(getpid(), signr
);
1682 static int stat__set_big_num(const struct option
*opt __maybe_unused
,
1683 const char *s __maybe_unused
, int unset
)
1685 big_num_opt
= unset
? 0 : 1;
1689 static int enable_metric_only(const struct option
*opt __maybe_unused
,
1690 const char *s __maybe_unused
, int unset
)
1692 force_metric_only
= true;
1693 metric_only
= !unset
;
1697 static const struct option stat_options
[] = {
1698 OPT_BOOLEAN('T', "transaction", &transaction_run
,
1699 "hardware transaction statistics"),
1700 OPT_CALLBACK('e', "event", &evsel_list
, "event",
1701 "event selector. use 'perf list' to list available events",
1702 parse_events_option
),
1703 OPT_CALLBACK(0, "filter", &evsel_list
, "filter",
1704 "event filter", parse_filter
),
1705 OPT_BOOLEAN('i', "no-inherit", &no_inherit
,
1706 "child tasks do not inherit counters"),
1707 OPT_STRING('p', "pid", &target
.pid
, "pid",
1708 "stat events on existing process id"),
1709 OPT_STRING('t', "tid", &target
.tid
, "tid",
1710 "stat events on existing thread id"),
1711 OPT_BOOLEAN('a', "all-cpus", &target
.system_wide
,
1712 "system-wide collection from all CPUs"),
1713 OPT_BOOLEAN('g', "group", &group
,
1714 "put the counters into a counter group"),
1715 OPT_BOOLEAN('c', "scale", &stat_config
.scale
, "scale/normalize counters"),
1716 OPT_INCR('v', "verbose", &verbose
,
1717 "be more verbose (show counter open errors, etc)"),
1718 OPT_INTEGER('r', "repeat", &run_count
,
1719 "repeat command and print average + stddev (max: 100, forever: 0)"),
1720 OPT_BOOLEAN('n', "null", &null_run
,
1721 "null run - dont start any counters"),
1722 OPT_INCR('d', "detailed", &detailed_run
,
1723 "detailed run - start a lot of events"),
1724 OPT_BOOLEAN('S', "sync", &sync_run
,
1725 "call sync() before starting a run"),
1726 OPT_CALLBACK_NOOPT('B', "big-num", NULL
, NULL
,
1727 "print large numbers with thousands\' separators",
1729 OPT_STRING('C', "cpu", &target
.cpu_list
, "cpu",
1730 "list of cpus to monitor in system-wide"),
1731 OPT_SET_UINT('A', "no-aggr", &stat_config
.aggr_mode
,
1732 "disable CPU count aggregation", AGGR_NONE
),
1733 OPT_BOOLEAN(0, "no-merge", &no_merge
, "Do not merge identical named events"),
1734 OPT_STRING('x', "field-separator", &csv_sep
, "separator",
1735 "print counts with custom separator"),
1736 OPT_CALLBACK('G', "cgroup", &evsel_list
, "name",
1737 "monitor event in cgroup name only", parse_cgroups
),
1738 OPT_STRING('o', "output", &output_name
, "file", "output file name"),
1739 OPT_BOOLEAN(0, "append", &append_file
, "append to the output file"),
1740 OPT_INTEGER(0, "log-fd", &output_fd
,
1741 "log output to fd, instead of stderr"),
1742 OPT_STRING(0, "pre", &pre_cmd
, "command",
1743 "command to run prior to the measured command"),
1744 OPT_STRING(0, "post", &post_cmd
, "command",
1745 "command to run after to the measured command"),
1746 OPT_UINTEGER('I', "interval-print", &stat_config
.interval
,
1747 "print counts at regular interval in ms (>= 10)"),
1748 OPT_SET_UINT(0, "per-socket", &stat_config
.aggr_mode
,
1749 "aggregate counts per processor socket", AGGR_SOCKET
),
1750 OPT_SET_UINT(0, "per-core", &stat_config
.aggr_mode
,
1751 "aggregate counts per physical processor core", AGGR_CORE
),
1752 OPT_SET_UINT(0, "per-thread", &stat_config
.aggr_mode
,
1753 "aggregate counts per thread", AGGR_THREAD
),
1754 OPT_UINTEGER('D', "delay", &initial_delay
,
1755 "ms to wait before starting measurement after program start"),
1756 OPT_CALLBACK_NOOPT(0, "metric-only", &metric_only
, NULL
,
1757 "Only print computed metrics. No raw values", enable_metric_only
),
1758 OPT_BOOLEAN(0, "topdown", &topdown_run
,
1759 "measure topdown level 1 statistics"),
1763 static int perf_stat__get_socket(struct cpu_map
*map
, int cpu
)
1765 return cpu_map__get_socket(map
, cpu
, NULL
);
1768 static int perf_stat__get_core(struct cpu_map
*map
, int cpu
)
1770 return cpu_map__get_core(map
, cpu
, NULL
);
1773 static int cpu_map__get_max(struct cpu_map
*map
)
1777 for (i
= 0; i
< map
->nr
; i
++) {
1778 if (map
->map
[i
] > max
)
1785 static struct cpu_map
*cpus_aggr_map
;
1787 static int perf_stat__get_aggr(aggr_get_id_t get_id
, struct cpu_map
*map
, int idx
)
1794 cpu
= map
->map
[idx
];
1796 if (cpus_aggr_map
->map
[cpu
] == -1)
1797 cpus_aggr_map
->map
[cpu
] = get_id(map
, idx
);
1799 return cpus_aggr_map
->map
[cpu
];
1802 static int perf_stat__get_socket_cached(struct cpu_map
*map
, int idx
)
1804 return perf_stat__get_aggr(perf_stat__get_socket
, map
, idx
);
1807 static int perf_stat__get_core_cached(struct cpu_map
*map
, int idx
)
1809 return perf_stat__get_aggr(perf_stat__get_core
, map
, idx
);
1812 static int perf_stat_init_aggr_mode(void)
1816 switch (stat_config
.aggr_mode
) {
1818 if (cpu_map__build_socket_map(evsel_list
->cpus
, &aggr_map
)) {
1819 perror("cannot build socket map");
1822 aggr_get_id
= perf_stat__get_socket_cached
;
1825 if (cpu_map__build_core_map(evsel_list
->cpus
, &aggr_map
)) {
1826 perror("cannot build core map");
1829 aggr_get_id
= perf_stat__get_core_cached
;
1840 * The evsel_list->cpus is the base we operate on,
1841 * taking the highest cpu number to be the size of
1842 * the aggregation translate cpumap.
1844 nr
= cpu_map__get_max(evsel_list
->cpus
);
1845 cpus_aggr_map
= cpu_map__empty_new(nr
+ 1);
1846 return cpus_aggr_map
? 0 : -ENOMEM
;
1849 static void perf_stat__exit_aggr_mode(void)
1851 cpu_map__put(aggr_map
);
1852 cpu_map__put(cpus_aggr_map
);
1854 cpus_aggr_map
= NULL
;
1857 static inline int perf_env__get_cpu(struct perf_env
*env
, struct cpu_map
*map
, int idx
)
1864 cpu
= map
->map
[idx
];
1866 if (cpu
>= env
->nr_cpus_avail
)
1872 static int perf_env__get_socket(struct cpu_map
*map
, int idx
, void *data
)
1874 struct perf_env
*env
= data
;
1875 int cpu
= perf_env__get_cpu(env
, map
, idx
);
1877 return cpu
== -1 ? -1 : env
->cpu
[cpu
].socket_id
;
1880 static int perf_env__get_core(struct cpu_map
*map
, int idx
, void *data
)
1882 struct perf_env
*env
= data
;
1883 int core
= -1, cpu
= perf_env__get_cpu(env
, map
, idx
);
1886 int socket_id
= env
->cpu
[cpu
].socket_id
;
1889 * Encode socket in upper 16 bits
1890 * core_id is relative to socket, and
1891 * we need a global id. So we combine
1894 core
= (socket_id
<< 16) | (env
->cpu
[cpu
].core_id
& 0xffff);
1900 static int perf_env__build_socket_map(struct perf_env
*env
, struct cpu_map
*cpus
,
1901 struct cpu_map
**sockp
)
1903 return cpu_map__build_map(cpus
, sockp
, perf_env__get_socket
, env
);
1906 static int perf_env__build_core_map(struct perf_env
*env
, struct cpu_map
*cpus
,
1907 struct cpu_map
**corep
)
1909 return cpu_map__build_map(cpus
, corep
, perf_env__get_core
, env
);
1912 static int perf_stat__get_socket_file(struct cpu_map
*map
, int idx
)
1914 return perf_env__get_socket(map
, idx
, &perf_stat
.session
->header
.env
);
1917 static int perf_stat__get_core_file(struct cpu_map
*map
, int idx
)
1919 return perf_env__get_core(map
, idx
, &perf_stat
.session
->header
.env
);
1922 static int perf_stat_init_aggr_mode_file(struct perf_stat
*st
)
1924 struct perf_env
*env
= &st
->session
->header
.env
;
1926 switch (stat_config
.aggr_mode
) {
1928 if (perf_env__build_socket_map(env
, evsel_list
->cpus
, &aggr_map
)) {
1929 perror("cannot build socket map");
1932 aggr_get_id
= perf_stat__get_socket_file
;
1935 if (perf_env__build_core_map(env
, evsel_list
->cpus
, &aggr_map
)) {
1936 perror("cannot build core map");
1939 aggr_get_id
= perf_stat__get_core_file
;
1952 static int topdown_filter_events(const char **attr
, char **str
, bool use_group
)
1959 for (i
= 0; attr
[i
]; i
++) {
1960 if (pmu_have_event("cpu", attr
[i
])) {
1961 len
+= strlen(attr
[i
]) + 1;
1962 attr
[i
- off
] = attr
[i
];
1966 attr
[i
- off
] = NULL
;
1968 *str
= malloc(len
+ 1 + 2);
1978 for (i
= 0; attr
[i
]; i
++) {
1991 __weak
bool arch_topdown_check_group(bool *warn
)
1997 __weak
void arch_topdown_group_warn(void)
2002 * Add default attributes, if there were no attributes specified or
2003 * if -d/--detailed, -d -d or -d -d -d is used:
2005 static int add_default_attributes(void)
2008 struct perf_event_attr default_attrs0
[] = {
2010 { .type
= PERF_TYPE_SOFTWARE
, .config
= PERF_COUNT_SW_TASK_CLOCK
},
2011 { .type
= PERF_TYPE_SOFTWARE
, .config
= PERF_COUNT_SW_CONTEXT_SWITCHES
},
2012 { .type
= PERF_TYPE_SOFTWARE
, .config
= PERF_COUNT_SW_CPU_MIGRATIONS
},
2013 { .type
= PERF_TYPE_SOFTWARE
, .config
= PERF_COUNT_SW_PAGE_FAULTS
},
2015 { .type
= PERF_TYPE_HARDWARE
, .config
= PERF_COUNT_HW_CPU_CYCLES
},
2017 struct perf_event_attr frontend_attrs
[] = {
2018 { .type
= PERF_TYPE_HARDWARE
, .config
= PERF_COUNT_HW_STALLED_CYCLES_FRONTEND
},
2020 struct perf_event_attr backend_attrs
[] = {
2021 { .type
= PERF_TYPE_HARDWARE
, .config
= PERF_COUNT_HW_STALLED_CYCLES_BACKEND
},
2023 struct perf_event_attr default_attrs1
[] = {
2024 { .type
= PERF_TYPE_HARDWARE
, .config
= PERF_COUNT_HW_INSTRUCTIONS
},
2025 { .type
= PERF_TYPE_HARDWARE
, .config
= PERF_COUNT_HW_BRANCH_INSTRUCTIONS
},
2026 { .type
= PERF_TYPE_HARDWARE
, .config
= PERF_COUNT_HW_BRANCH_MISSES
},
2031 * Detailed stats (-d), covering the L1 and last level data caches:
2033 struct perf_event_attr detailed_attrs
[] = {
2035 { .type
= PERF_TYPE_HW_CACHE
,
2037 PERF_COUNT_HW_CACHE_L1D
<< 0 |
2038 (PERF_COUNT_HW_CACHE_OP_READ
<< 8) |
2039 (PERF_COUNT_HW_CACHE_RESULT_ACCESS
<< 16) },
2041 { .type
= PERF_TYPE_HW_CACHE
,
2043 PERF_COUNT_HW_CACHE_L1D
<< 0 |
2044 (PERF_COUNT_HW_CACHE_OP_READ
<< 8) |
2045 (PERF_COUNT_HW_CACHE_RESULT_MISS
<< 16) },
2047 { .type
= PERF_TYPE_HW_CACHE
,
2049 PERF_COUNT_HW_CACHE_LL
<< 0 |
2050 (PERF_COUNT_HW_CACHE_OP_READ
<< 8) |
2051 (PERF_COUNT_HW_CACHE_RESULT_ACCESS
<< 16) },
2053 { .type
= PERF_TYPE_HW_CACHE
,
2055 PERF_COUNT_HW_CACHE_LL
<< 0 |
2056 (PERF_COUNT_HW_CACHE_OP_READ
<< 8) |
2057 (PERF_COUNT_HW_CACHE_RESULT_MISS
<< 16) },
2061 * Very detailed stats (-d -d), covering the instruction cache and the TLB caches:
2063 struct perf_event_attr very_detailed_attrs
[] = {
2065 { .type
= PERF_TYPE_HW_CACHE
,
2067 PERF_COUNT_HW_CACHE_L1I
<< 0 |
2068 (PERF_COUNT_HW_CACHE_OP_READ
<< 8) |
2069 (PERF_COUNT_HW_CACHE_RESULT_ACCESS
<< 16) },
2071 { .type
= PERF_TYPE_HW_CACHE
,
2073 PERF_COUNT_HW_CACHE_L1I
<< 0 |
2074 (PERF_COUNT_HW_CACHE_OP_READ
<< 8) |
2075 (PERF_COUNT_HW_CACHE_RESULT_MISS
<< 16) },
2077 { .type
= PERF_TYPE_HW_CACHE
,
2079 PERF_COUNT_HW_CACHE_DTLB
<< 0 |
2080 (PERF_COUNT_HW_CACHE_OP_READ
<< 8) |
2081 (PERF_COUNT_HW_CACHE_RESULT_ACCESS
<< 16) },
2083 { .type
= PERF_TYPE_HW_CACHE
,
2085 PERF_COUNT_HW_CACHE_DTLB
<< 0 |
2086 (PERF_COUNT_HW_CACHE_OP_READ
<< 8) |
2087 (PERF_COUNT_HW_CACHE_RESULT_MISS
<< 16) },
2089 { .type
= PERF_TYPE_HW_CACHE
,
2091 PERF_COUNT_HW_CACHE_ITLB
<< 0 |
2092 (PERF_COUNT_HW_CACHE_OP_READ
<< 8) |
2093 (PERF_COUNT_HW_CACHE_RESULT_ACCESS
<< 16) },
2095 { .type
= PERF_TYPE_HW_CACHE
,
2097 PERF_COUNT_HW_CACHE_ITLB
<< 0 |
2098 (PERF_COUNT_HW_CACHE_OP_READ
<< 8) |
2099 (PERF_COUNT_HW_CACHE_RESULT_MISS
<< 16) },
2104 * Very, very detailed stats (-d -d -d), adding prefetch events:
2106 struct perf_event_attr very_very_detailed_attrs
[] = {
2108 { .type
= PERF_TYPE_HW_CACHE
,
2110 PERF_COUNT_HW_CACHE_L1D
<< 0 |
2111 (PERF_COUNT_HW_CACHE_OP_PREFETCH
<< 8) |
2112 (PERF_COUNT_HW_CACHE_RESULT_ACCESS
<< 16) },
2114 { .type
= PERF_TYPE_HW_CACHE
,
2116 PERF_COUNT_HW_CACHE_L1D
<< 0 |
2117 (PERF_COUNT_HW_CACHE_OP_PREFETCH
<< 8) |
2118 (PERF_COUNT_HW_CACHE_RESULT_MISS
<< 16) },
2121 /* Set attrs if no event is selected and !null_run: */
2125 if (transaction_run
) {
2126 if (pmu_have_event("cpu", "cycles-ct") &&
2127 pmu_have_event("cpu", "el-start"))
2128 err
= parse_events(evsel_list
, transaction_attrs
, NULL
);
2130 err
= parse_events(evsel_list
, transaction_limited_attrs
, NULL
);
2132 fprintf(stderr
, "Cannot set up transaction events\n");
2142 if (stat_config
.aggr_mode
!= AGGR_GLOBAL
&&
2143 stat_config
.aggr_mode
!= AGGR_CORE
) {
2144 pr_err("top down event configuration requires --per-core mode\n");
2147 stat_config
.aggr_mode
= AGGR_CORE
;
2148 if (nr_cgroups
|| !target__has_cpu(&target
)) {
2149 pr_err("top down event configuration requires system-wide mode (-a)\n");
2153 if (!force_metric_only
)
2155 if (topdown_filter_events(topdown_attrs
, &str
,
2156 arch_topdown_check_group(&warn
)) < 0) {
2157 pr_err("Out of memory\n");
2160 if (topdown_attrs
[0] && str
) {
2162 arch_topdown_group_warn();
2163 err
= parse_events(evsel_list
, str
, NULL
);
2166 "Cannot set up top down events %s: %d\n",
2172 fprintf(stderr
, "System does not support topdown\n");
2178 if (!evsel_list
->nr_entries
) {
2179 if (target__has_cpu(&target
))
2180 default_attrs0
[0].config
= PERF_COUNT_SW_CPU_CLOCK
;
2182 if (perf_evlist__add_default_attrs(evsel_list
, default_attrs0
) < 0)
2184 if (pmu_have_event("cpu", "stalled-cycles-frontend")) {
2185 if (perf_evlist__add_default_attrs(evsel_list
,
2186 frontend_attrs
) < 0)
2189 if (pmu_have_event("cpu", "stalled-cycles-backend")) {
2190 if (perf_evlist__add_default_attrs(evsel_list
,
2194 if (perf_evlist__add_default_attrs(evsel_list
, default_attrs1
) < 0)
2198 /* Detailed events get appended to the event list: */
2200 if (detailed_run
< 1)
2203 /* Append detailed run extra attributes: */
2204 if (perf_evlist__add_default_attrs(evsel_list
, detailed_attrs
) < 0)
2207 if (detailed_run
< 2)
2210 /* Append very detailed run extra attributes: */
2211 if (perf_evlist__add_default_attrs(evsel_list
, very_detailed_attrs
) < 0)
2214 if (detailed_run
< 3)
2217 /* Append very, very detailed run extra attributes: */
2218 return perf_evlist__add_default_attrs(evsel_list
, very_very_detailed_attrs
);
2221 static const char * const stat_record_usage
[] = {
2222 "perf stat record [<options>]",
2226 static void init_features(struct perf_session
*session
)
2230 for (feat
= HEADER_FIRST_FEATURE
; feat
< HEADER_LAST_FEATURE
; feat
++)
2231 perf_header__set_feat(&session
->header
, feat
);
2233 perf_header__clear_feat(&session
->header
, HEADER_BUILD_ID
);
2234 perf_header__clear_feat(&session
->header
, HEADER_TRACING_DATA
);
2235 perf_header__clear_feat(&session
->header
, HEADER_BRANCH_STACK
);
2236 perf_header__clear_feat(&session
->header
, HEADER_AUXTRACE
);
2239 static int __cmd_record(int argc
, const char **argv
)
2241 struct perf_session
*session
;
2242 struct perf_data_file
*file
= &perf_stat
.file
;
2244 argc
= parse_options(argc
, argv
, stat_options
, stat_record_usage
,
2245 PARSE_OPT_STOP_AT_NON_OPTION
);
2248 file
->path
= output_name
;
2250 if (run_count
!= 1 || forever
) {
2251 pr_err("Cannot use -r option with perf stat record.\n");
2255 session
= perf_session__new(file
, false, NULL
);
2256 if (session
== NULL
) {
2257 pr_err("Perf session creation failed.\n");
2261 init_features(session
);
2263 session
->evlist
= evsel_list
;
2264 perf_stat
.session
= session
;
2265 perf_stat
.record
= true;
2269 static int process_stat_round_event(struct perf_tool
*tool __maybe_unused
,
2270 union perf_event
*event
,
2271 struct perf_session
*session
)
2273 struct stat_round_event
*stat_round
= &event
->stat_round
;
2274 struct perf_evsel
*counter
;
2275 struct timespec tsh
, *ts
= NULL
;
2276 const char **argv
= session
->header
.env
.cmdline_argv
;
2277 int argc
= session
->header
.env
.nr_cmdline
;
2279 evlist__for_each_entry(evsel_list
, counter
)
2280 perf_stat_process_counter(&stat_config
, counter
);
2282 if (stat_round
->type
== PERF_STAT_ROUND_TYPE__FINAL
)
2283 update_stats(&walltime_nsecs_stats
, stat_round
->time
);
2285 if (stat_config
.interval
&& stat_round
->time
) {
2286 tsh
.tv_sec
= stat_round
->time
/ NSEC_PER_SEC
;
2287 tsh
.tv_nsec
= stat_round
->time
% NSEC_PER_SEC
;
2291 print_counters(ts
, argc
, argv
);
2296 int process_stat_config_event(struct perf_tool
*tool
,
2297 union perf_event
*event
,
2298 struct perf_session
*session __maybe_unused
)
2300 struct perf_stat
*st
= container_of(tool
, struct perf_stat
, tool
);
2302 perf_event__read_stat_config(&stat_config
, &event
->stat_config
);
2304 if (cpu_map__empty(st
->cpus
)) {
2305 if (st
->aggr_mode
!= AGGR_UNSET
)
2306 pr_warning("warning: processing task data, aggregation mode not set\n");
2310 if (st
->aggr_mode
!= AGGR_UNSET
)
2311 stat_config
.aggr_mode
= st
->aggr_mode
;
2313 if (perf_stat
.file
.is_pipe
)
2314 perf_stat_init_aggr_mode();
2316 perf_stat_init_aggr_mode_file(st
);
2321 static int set_maps(struct perf_stat
*st
)
2323 if (!st
->cpus
|| !st
->threads
)
2326 if (WARN_ONCE(st
->maps_allocated
, "stats double allocation\n"))
2329 perf_evlist__set_maps(evsel_list
, st
->cpus
, st
->threads
);
2331 if (perf_evlist__alloc_stats(evsel_list
, true))
2334 st
->maps_allocated
= true;
2339 int process_thread_map_event(struct perf_tool
*tool
,
2340 union perf_event
*event
,
2341 struct perf_session
*session __maybe_unused
)
2343 struct perf_stat
*st
= container_of(tool
, struct perf_stat
, tool
);
2346 pr_warning("Extra thread map event, ignoring.\n");
2350 st
->threads
= thread_map__new_event(&event
->thread_map
);
2354 return set_maps(st
);
2358 int process_cpu_map_event(struct perf_tool
*tool
,
2359 union perf_event
*event
,
2360 struct perf_session
*session __maybe_unused
)
2362 struct perf_stat
*st
= container_of(tool
, struct perf_stat
, tool
);
2363 struct cpu_map
*cpus
;
2366 pr_warning("Extra cpu map event, ignoring.\n");
2370 cpus
= cpu_map__new_data(&event
->cpu_map
.data
);
2375 return set_maps(st
);
2378 static const char * const stat_report_usage
[] = {
2379 "perf stat report [<options>]",
2383 static struct perf_stat perf_stat
= {
2385 .attr
= perf_event__process_attr
,
2386 .event_update
= perf_event__process_event_update
,
2387 .thread_map
= process_thread_map_event
,
2388 .cpu_map
= process_cpu_map_event
,
2389 .stat_config
= process_stat_config_event
,
2390 .stat
= perf_event__process_stat_event
,
2391 .stat_round
= process_stat_round_event
,
2393 .aggr_mode
= AGGR_UNSET
,
2396 static int __cmd_report(int argc
, const char **argv
)
2398 struct perf_session
*session
;
2399 const struct option options
[] = {
2400 OPT_STRING('i', "input", &input_name
, "file", "input file name"),
2401 OPT_SET_UINT(0, "per-socket", &perf_stat
.aggr_mode
,
2402 "aggregate counts per processor socket", AGGR_SOCKET
),
2403 OPT_SET_UINT(0, "per-core", &perf_stat
.aggr_mode
,
2404 "aggregate counts per physical processor core", AGGR_CORE
),
2405 OPT_SET_UINT('A', "no-aggr", &perf_stat
.aggr_mode
,
2406 "disable CPU count aggregation", AGGR_NONE
),
2412 argc
= parse_options(argc
, argv
, options
, stat_report_usage
, 0);
2414 if (!input_name
|| !strlen(input_name
)) {
2415 if (!fstat(STDIN_FILENO
, &st
) && S_ISFIFO(st
.st_mode
))
2418 input_name
= "perf.data";
2421 perf_stat
.file
.path
= input_name
;
2422 perf_stat
.file
.mode
= PERF_DATA_MODE_READ
;
2424 session
= perf_session__new(&perf_stat
.file
, false, &perf_stat
.tool
);
2425 if (session
== NULL
)
2428 perf_stat
.session
= session
;
2429 stat_config
.output
= stderr
;
2430 evsel_list
= session
->evlist
;
2432 ret
= perf_session__process_events(session
);
2436 perf_session__delete(session
);
2440 static void setup_system_wide(int forks
)
2443 * Make system wide (-a) the default target if
2444 * no target was specified and one of following
2445 * conditions is met:
2447 * - there's no workload specified
2448 * - there is workload specified but all requested
2449 * events are system wide events
2451 if (!target__none(&target
))
2455 target
.system_wide
= true;
2457 struct perf_evsel
*counter
;
2459 evlist__for_each_entry(evsel_list
, counter
) {
2460 if (!counter
->system_wide
)
2464 if (evsel_list
->nr_entries
)
2465 target
.system_wide
= true;
2469 int cmd_stat(int argc
, const char **argv
, const char *prefix __maybe_unused
)
2471 const char * const stat_usage
[] = {
2472 "perf stat [<options>] [<command>]",
2475 int status
= -EINVAL
, run_idx
;
2477 FILE *output
= stderr
;
2478 unsigned int interval
;
2479 const char * const stat_subcommands
[] = { "record", "report" };
2481 setlocale(LC_ALL
, "");
2483 evsel_list
= perf_evlist__new();
2484 if (evsel_list
== NULL
)
2487 parse_events__shrink_config_terms();
2488 argc
= parse_options_subcommand(argc
, argv
, stat_options
, stat_subcommands
,
2489 (const char **) stat_usage
,
2490 PARSE_OPT_STOP_AT_NON_OPTION
);
2491 perf_stat__init_shadow_stats();
2495 if (!strcmp(csv_sep
, "\\t"))
2498 csv_sep
= DEFAULT_SEPARATOR
;
2500 if (argc
&& !strncmp(argv
[0], "rec", 3)) {
2501 argc
= __cmd_record(argc
, argv
);
2504 } else if (argc
&& !strncmp(argv
[0], "rep", 3))
2505 return __cmd_report(argc
, argv
);
2507 interval
= stat_config
.interval
;
2510 * For record command the -o is already taken care of.
2512 if (!STAT_RECORD
&& output_name
&& strcmp(output_name
, "-"))
2515 if (output_name
&& output_fd
) {
2516 fprintf(stderr
, "cannot use both --output and --log-fd\n");
2517 parse_options_usage(stat_usage
, stat_options
, "o", 1);
2518 parse_options_usage(NULL
, stat_options
, "log-fd", 0);
2522 if (metric_only
&& stat_config
.aggr_mode
== AGGR_THREAD
) {
2523 fprintf(stderr
, "--metric-only is not supported with --per-thread\n");
2527 if (metric_only
&& run_count
> 1) {
2528 fprintf(stderr
, "--metric-only is not supported with -r\n");
2532 if (output_fd
< 0) {
2533 fprintf(stderr
, "argument to --log-fd must be a > 0\n");
2534 parse_options_usage(stat_usage
, stat_options
, "log-fd", 0);
2540 mode
= append_file
? "a" : "w";
2542 output
= fopen(output_name
, mode
);
2544 perror("failed to create output file");
2547 clock_gettime(CLOCK_REALTIME
, &tm
);
2548 fprintf(output
, "# started on %s\n", ctime(&tm
.tv_sec
));
2549 } else if (output_fd
> 0) {
2550 mode
= append_file
? "a" : "w";
2551 output
= fdopen(output_fd
, mode
);
2553 perror("Failed opening logfd");
2558 stat_config
.output
= output
;
2561 * let the spreadsheet do the pretty-printing
2564 /* User explicitly passed -B? */
2565 if (big_num_opt
== 1) {
2566 fprintf(stderr
, "-B option not supported with -x\n");
2567 parse_options_usage(stat_usage
, stat_options
, "B", 1);
2568 parse_options_usage(NULL
, stat_options
, "x", 1);
2570 } else /* Nope, so disable big number formatting */
2572 } else if (big_num_opt
== 0) /* User passed --no-big-num */
2575 setup_system_wide(argc
);
2577 if (run_count
< 0) {
2578 pr_err("Run count must be a positive number\n");
2579 parse_options_usage(stat_usage
, stat_options
, "r", 1);
2581 } else if (run_count
== 0) {
2586 if ((stat_config
.aggr_mode
== AGGR_THREAD
) && !target__has_task(&target
)) {
2587 fprintf(stderr
, "The --per-thread option is only available "
2588 "when monitoring via -p -t options.\n");
2589 parse_options_usage(NULL
, stat_options
, "p", 1);
2590 parse_options_usage(NULL
, stat_options
, "t", 1);
2595 * no_aggr, cgroup are for system-wide only
2596 * --per-thread is aggregated per thread, we dont mix it with cpu mode
2598 if (((stat_config
.aggr_mode
!= AGGR_GLOBAL
&&
2599 stat_config
.aggr_mode
!= AGGR_THREAD
) || nr_cgroups
) &&
2600 !target__has_cpu(&target
)) {
2601 fprintf(stderr
, "both cgroup and no-aggregation "
2602 "modes only available in system-wide mode\n");
2604 parse_options_usage(stat_usage
, stat_options
, "G", 1);
2605 parse_options_usage(NULL
, stat_options
, "A", 1);
2606 parse_options_usage(NULL
, stat_options
, "a", 1);
2610 if (add_default_attributes())
2613 target__validate(&target
);
2615 if (perf_evlist__create_maps(evsel_list
, &target
) < 0) {
2616 if (target__has_task(&target
)) {
2617 pr_err("Problems finding threads of monitor\n");
2618 parse_options_usage(stat_usage
, stat_options
, "p", 1);
2619 parse_options_usage(NULL
, stat_options
, "t", 1);
2620 } else if (target__has_cpu(&target
)) {
2621 perror("failed to parse CPUs map");
2622 parse_options_usage(stat_usage
, stat_options
, "C", 1);
2623 parse_options_usage(NULL
, stat_options
, "a", 1);
2629 * Initialize thread_map with comm names,
2630 * so we could print it out on output.
2632 if (stat_config
.aggr_mode
== AGGR_THREAD
)
2633 thread_map__read_comms(evsel_list
->threads
);
2635 if (interval
&& interval
< 100) {
2636 if (interval
< 10) {
2637 pr_err("print interval must be >= 10ms\n");
2638 parse_options_usage(stat_usage
, stat_options
, "I", 1);
2641 pr_warning("print interval < 100ms. "
2642 "The overhead percentage could be high in some cases. "
2643 "Please proceed with caution.\n");
2646 if (perf_evlist__alloc_stats(evsel_list
, interval
))
2649 if (perf_stat_init_aggr_mode())
2653 * We dont want to block the signals - that would cause
2654 * child tasks to inherit that and Ctrl-C would not work.
2655 * What we want is for Ctrl-C to work in the exec()-ed
2656 * task, but being ignored by perf stat itself:
2660 signal(SIGINT
, skip_signal
);
2661 signal(SIGCHLD
, skip_signal
);
2662 signal(SIGALRM
, skip_signal
);
2663 signal(SIGABRT
, skip_signal
);
2666 for (run_idx
= 0; forever
|| run_idx
< run_count
; run_idx
++) {
2667 if (run_count
!= 1 && verbose
> 0)
2668 fprintf(output
, "[ perf stat: executing run #%d ... ]\n",
2671 status
= run_perf_stat(argc
, argv
);
2672 if (forever
&& status
!= -1) {
2673 print_counters(NULL
, argc
, argv
);
2674 perf_stat__reset_stats();
2678 if (!forever
&& status
!= -1 && !interval
)
2679 print_counters(NULL
, argc
, argv
);
2683 * We synthesize the kernel mmap record just so that older tools
2684 * don't emit warnings about not being able to resolve symbols
2685 * due to /proc/sys/kernel/kptr_restrict settings and instear provide
2686 * a saner message about no samples being in the perf.data file.
2688 * This also serves to suppress a warning about f_header.data.size == 0
2689 * in header.c at the moment 'perf stat record' gets introduced, which
2690 * is not really needed once we start adding the stat specific PERF_RECORD_
2691 * records, but the need to suppress the kptr_restrict messages in older
2692 * tools remain -acme
2694 int fd
= perf_data_file__fd(&perf_stat
.file
);
2695 int err
= perf_event__synthesize_kernel_mmap((void *)&perf_stat
,
2696 process_synthesized_event
,
2697 &perf_stat
.session
->machines
.host
);
2699 pr_warning("Couldn't synthesize the kernel mmap record, harmless, "
2700 "older tools may produce warnings about this file\n.");
2704 if (WRITE_STAT_ROUND_EVENT(walltime_nsecs_stats
.max
, FINAL
))
2705 pr_err("failed to write stat round event\n");
2708 if (!perf_stat
.file
.is_pipe
) {
2709 perf_stat
.session
->header
.data_size
+= perf_stat
.bytes_written
;
2710 perf_session__write_header(perf_stat
.session
, evsel_list
, fd
, true);
2713 perf_session__delete(perf_stat
.session
);
2716 perf_stat__exit_aggr_mode();
2717 perf_evlist__free_stats(evsel_list
);
2719 perf_evlist__delete(evsel_list
);