2 * Copyright (C) 2011, Red Hat Inc, Arnaldo Carvalho de Melo <acme@redhat.com>
4 * Parts came from builtin-{top,stat,record}.c, see those files for further
7 * Released under the GPL v2. (and only v2, not any later version)
10 #include <api/fs/fs.h>
15 #include "thread_map.h"
22 #include "bpf-event.h"
26 #include "parse-events.h"
27 #include <subcmd/parse-options.h>
30 #include <sys/ioctl.h>
33 #include <linux/bitops.h>
34 #include <linux/hash.h>
35 #include <linux/log2.h>
36 #include <linux/err.h>
38 #ifdef LACKS_SIGQUEUE_PROTOTYPE
39 int sigqueue(pid_t pid
, int sig
, const union sigval value
);
42 #define FD(e, x, y) (*(int *)xyarray__entry(e->fd, x, y))
43 #define SID(e, x, y) xyarray__entry(e->sample_id, x, y)
45 void perf_evlist__init(struct perf_evlist
*evlist
, struct cpu_map
*cpus
,
46 struct thread_map
*threads
)
50 for (i
= 0; i
< PERF_EVLIST__HLIST_SIZE
; ++i
)
51 INIT_HLIST_HEAD(&evlist
->heads
[i
]);
52 INIT_LIST_HEAD(&evlist
->entries
);
53 perf_evlist__set_maps(evlist
, cpus
, threads
);
54 fdarray__init(&evlist
->pollfd
, 64);
55 evlist
->workload
.pid
= -1;
56 evlist
->bkw_mmap_state
= BKW_MMAP_NOTREADY
;
59 struct perf_evlist
*perf_evlist__new(void)
61 struct perf_evlist
*evlist
= zalloc(sizeof(*evlist
));
64 perf_evlist__init(evlist
, NULL
, NULL
);
69 struct perf_evlist
*perf_evlist__new_default(void)
71 struct perf_evlist
*evlist
= perf_evlist__new();
73 if (evlist
&& perf_evlist__add_default(evlist
)) {
74 perf_evlist__delete(evlist
);
81 struct perf_evlist
*perf_evlist__new_dummy(void)
83 struct perf_evlist
*evlist
= perf_evlist__new();
85 if (evlist
&& perf_evlist__add_dummy(evlist
)) {
86 perf_evlist__delete(evlist
);
94 * perf_evlist__set_id_pos - set the positions of event ids.
95 * @evlist: selected event list
97 * Events with compatible sample types all have the same id_pos
98 * and is_pos. For convenience, put a copy on evlist.
100 void perf_evlist__set_id_pos(struct perf_evlist
*evlist
)
102 struct perf_evsel
*first
= perf_evlist__first(evlist
);
104 evlist
->id_pos
= first
->id_pos
;
105 evlist
->is_pos
= first
->is_pos
;
108 static void perf_evlist__update_id_pos(struct perf_evlist
*evlist
)
110 struct perf_evsel
*evsel
;
112 evlist__for_each_entry(evlist
, evsel
)
113 perf_evsel__calc_id_pos(evsel
);
115 perf_evlist__set_id_pos(evlist
);
118 static void perf_evlist__purge(struct perf_evlist
*evlist
)
120 struct perf_evsel
*pos
, *n
;
122 evlist__for_each_entry_safe(evlist
, n
, pos
) {
123 list_del_init(&pos
->node
);
125 perf_evsel__delete(pos
);
128 evlist
->nr_entries
= 0;
131 void perf_evlist__exit(struct perf_evlist
*evlist
)
133 zfree(&evlist
->mmap
);
134 zfree(&evlist
->overwrite_mmap
);
135 fdarray__exit(&evlist
->pollfd
);
138 void perf_evlist__delete(struct perf_evlist
*evlist
)
143 perf_evlist__munmap(evlist
);
144 perf_evlist__close(evlist
);
145 cpu_map__put(evlist
->cpus
);
146 thread_map__put(evlist
->threads
);
148 evlist
->threads
= NULL
;
149 perf_evlist__purge(evlist
);
150 perf_evlist__exit(evlist
);
154 static void __perf_evlist__propagate_maps(struct perf_evlist
*evlist
,
155 struct perf_evsel
*evsel
)
158 * We already have cpus for evsel (via PMU sysfs) so
159 * keep it, if there's no target cpu list defined.
161 if (!evsel
->own_cpus
|| evlist
->has_user_cpus
) {
162 cpu_map__put(evsel
->cpus
);
163 evsel
->cpus
= cpu_map__get(evlist
->cpus
);
164 } else if (evsel
->cpus
!= evsel
->own_cpus
) {
165 cpu_map__put(evsel
->cpus
);
166 evsel
->cpus
= cpu_map__get(evsel
->own_cpus
);
169 thread_map__put(evsel
->threads
);
170 evsel
->threads
= thread_map__get(evlist
->threads
);
173 static void perf_evlist__propagate_maps(struct perf_evlist
*evlist
)
175 struct perf_evsel
*evsel
;
177 evlist__for_each_entry(evlist
, evsel
)
178 __perf_evlist__propagate_maps(evlist
, evsel
);
181 void perf_evlist__add(struct perf_evlist
*evlist
, struct perf_evsel
*entry
)
183 entry
->evlist
= evlist
;
184 list_add_tail(&entry
->node
, &evlist
->entries
);
185 entry
->idx
= evlist
->nr_entries
;
186 entry
->tracking
= !entry
->idx
;
188 if (!evlist
->nr_entries
++)
189 perf_evlist__set_id_pos(evlist
);
191 __perf_evlist__propagate_maps(evlist
, entry
);
194 void perf_evlist__remove(struct perf_evlist
*evlist
, struct perf_evsel
*evsel
)
196 evsel
->evlist
= NULL
;
197 list_del_init(&evsel
->node
);
198 evlist
->nr_entries
-= 1;
201 void perf_evlist__splice_list_tail(struct perf_evlist
*evlist
,
202 struct list_head
*list
)
204 struct perf_evsel
*evsel
, *temp
;
206 __evlist__for_each_entry_safe(list
, temp
, evsel
) {
207 list_del_init(&evsel
->node
);
208 perf_evlist__add(evlist
, evsel
);
212 void __perf_evlist__set_leader(struct list_head
*list
)
214 struct perf_evsel
*evsel
, *leader
;
216 leader
= list_entry(list
->next
, struct perf_evsel
, node
);
217 evsel
= list_entry(list
->prev
, struct perf_evsel
, node
);
219 leader
->nr_members
= evsel
->idx
- leader
->idx
+ 1;
221 __evlist__for_each_entry(list
, evsel
) {
222 evsel
->leader
= leader
;
226 void perf_evlist__set_leader(struct perf_evlist
*evlist
)
228 if (evlist
->nr_entries
) {
229 evlist
->nr_groups
= evlist
->nr_entries
> 1 ? 1 : 0;
230 __perf_evlist__set_leader(&evlist
->entries
);
234 int __perf_evlist__add_default(struct perf_evlist
*evlist
, bool precise
)
236 struct perf_evsel
*evsel
= perf_evsel__new_cycles(precise
);
241 perf_evlist__add(evlist
, evsel
);
245 int perf_evlist__add_dummy(struct perf_evlist
*evlist
)
247 struct perf_event_attr attr
= {
248 .type
= PERF_TYPE_SOFTWARE
,
249 .config
= PERF_COUNT_SW_DUMMY
,
250 .size
= sizeof(attr
), /* to capture ABI version */
252 struct perf_evsel
*evsel
= perf_evsel__new_idx(&attr
, evlist
->nr_entries
);
257 perf_evlist__add(evlist
, evsel
);
261 static int perf_evlist__add_attrs(struct perf_evlist
*evlist
,
262 struct perf_event_attr
*attrs
, size_t nr_attrs
)
264 struct perf_evsel
*evsel
, *n
;
268 for (i
= 0; i
< nr_attrs
; i
++) {
269 evsel
= perf_evsel__new_idx(attrs
+ i
, evlist
->nr_entries
+ i
);
271 goto out_delete_partial_list
;
272 list_add_tail(&evsel
->node
, &head
);
275 perf_evlist__splice_list_tail(evlist
, &head
);
279 out_delete_partial_list
:
280 __evlist__for_each_entry_safe(&head
, n
, evsel
)
281 perf_evsel__delete(evsel
);
285 int __perf_evlist__add_default_attrs(struct perf_evlist
*evlist
,
286 struct perf_event_attr
*attrs
, size_t nr_attrs
)
290 for (i
= 0; i
< nr_attrs
; i
++)
291 event_attr_init(attrs
+ i
);
293 return perf_evlist__add_attrs(evlist
, attrs
, nr_attrs
);
297 perf_evlist__find_tracepoint_by_id(struct perf_evlist
*evlist
, int id
)
299 struct perf_evsel
*evsel
;
301 evlist__for_each_entry(evlist
, evsel
) {
302 if (evsel
->attr
.type
== PERF_TYPE_TRACEPOINT
&&
303 (int)evsel
->attr
.config
== id
)
311 perf_evlist__find_tracepoint_by_name(struct perf_evlist
*evlist
,
314 struct perf_evsel
*evsel
;
316 evlist__for_each_entry(evlist
, evsel
) {
317 if ((evsel
->attr
.type
== PERF_TYPE_TRACEPOINT
) &&
318 (strcmp(evsel
->name
, name
) == 0))
325 int perf_evlist__add_newtp(struct perf_evlist
*evlist
,
326 const char *sys
, const char *name
, void *handler
)
328 struct perf_evsel
*evsel
= perf_evsel__newtp(sys
, name
);
333 evsel
->handler
= handler
;
334 perf_evlist__add(evlist
, evsel
);
338 static int perf_evlist__nr_threads(struct perf_evlist
*evlist
,
339 struct perf_evsel
*evsel
)
341 if (evsel
->system_wide
)
344 return thread_map__nr(evlist
->threads
);
347 void perf_evlist__disable(struct perf_evlist
*evlist
)
349 struct perf_evsel
*pos
;
351 evlist__for_each_entry(evlist
, pos
) {
352 if (pos
->disabled
|| !perf_evsel__is_group_leader(pos
) || !pos
->fd
)
354 perf_evsel__disable(pos
);
357 evlist
->enabled
= false;
360 void perf_evlist__enable(struct perf_evlist
*evlist
)
362 struct perf_evsel
*pos
;
364 evlist__for_each_entry(evlist
, pos
) {
365 if (!perf_evsel__is_group_leader(pos
) || !pos
->fd
)
367 perf_evsel__enable(pos
);
370 evlist
->enabled
= true;
373 void perf_evlist__toggle_enable(struct perf_evlist
*evlist
)
375 (evlist
->enabled
? perf_evlist__disable
: perf_evlist__enable
)(evlist
);
378 static int perf_evlist__enable_event_cpu(struct perf_evlist
*evlist
,
379 struct perf_evsel
*evsel
, int cpu
)
382 int nr_threads
= perf_evlist__nr_threads(evlist
, evsel
);
387 for (thread
= 0; thread
< nr_threads
; thread
++) {
388 int err
= ioctl(FD(evsel
, cpu
, thread
), PERF_EVENT_IOC_ENABLE
, 0);
395 static int perf_evlist__enable_event_thread(struct perf_evlist
*evlist
,
396 struct perf_evsel
*evsel
,
400 int nr_cpus
= cpu_map__nr(evlist
->cpus
);
405 for (cpu
= 0; cpu
< nr_cpus
; cpu
++) {
406 int err
= ioctl(FD(evsel
, cpu
, thread
), PERF_EVENT_IOC_ENABLE
, 0);
413 int perf_evlist__enable_event_idx(struct perf_evlist
*evlist
,
414 struct perf_evsel
*evsel
, int idx
)
416 bool per_cpu_mmaps
= !cpu_map__empty(evlist
->cpus
);
419 return perf_evlist__enable_event_cpu(evlist
, evsel
, idx
);
421 return perf_evlist__enable_event_thread(evlist
, evsel
, idx
);
424 int perf_evlist__alloc_pollfd(struct perf_evlist
*evlist
)
426 int nr_cpus
= cpu_map__nr(evlist
->cpus
);
427 int nr_threads
= thread_map__nr(evlist
->threads
);
429 struct perf_evsel
*evsel
;
431 evlist__for_each_entry(evlist
, evsel
) {
432 if (evsel
->system_wide
)
435 nfds
+= nr_cpus
* nr_threads
;
438 if (fdarray__available_entries(&evlist
->pollfd
) < nfds
&&
439 fdarray__grow(&evlist
->pollfd
, nfds
) < 0)
445 static int __perf_evlist__add_pollfd(struct perf_evlist
*evlist
, int fd
,
446 struct perf_mmap
*map
, short revent
)
448 int pos
= fdarray__add(&evlist
->pollfd
, fd
, revent
| POLLERR
| POLLHUP
);
450 * Save the idx so that when we filter out fds POLLHUP'ed we can
451 * close the associated evlist->mmap[] entry.
454 evlist
->pollfd
.priv
[pos
].ptr
= map
;
456 fcntl(fd
, F_SETFL
, O_NONBLOCK
);
462 int perf_evlist__add_pollfd(struct perf_evlist
*evlist
, int fd
)
464 return __perf_evlist__add_pollfd(evlist
, fd
, NULL
, POLLIN
);
467 static void perf_evlist__munmap_filtered(struct fdarray
*fda
, int fd
,
468 void *arg __maybe_unused
)
470 struct perf_mmap
*map
= fda
->priv
[fd
].ptr
;
476 int perf_evlist__filter_pollfd(struct perf_evlist
*evlist
, short revents_and_mask
)
478 return fdarray__filter(&evlist
->pollfd
, revents_and_mask
,
479 perf_evlist__munmap_filtered
, NULL
);
482 int perf_evlist__poll(struct perf_evlist
*evlist
, int timeout
)
484 return fdarray__poll(&evlist
->pollfd
, timeout
);
487 static void perf_evlist__id_hash(struct perf_evlist
*evlist
,
488 struct perf_evsel
*evsel
,
489 int cpu
, int thread
, u64 id
)
492 struct perf_sample_id
*sid
= SID(evsel
, cpu
, thread
);
496 hash
= hash_64(sid
->id
, PERF_EVLIST__HLIST_BITS
);
497 hlist_add_head(&sid
->node
, &evlist
->heads
[hash
]);
500 void perf_evlist__id_add(struct perf_evlist
*evlist
, struct perf_evsel
*evsel
,
501 int cpu
, int thread
, u64 id
)
503 perf_evlist__id_hash(evlist
, evsel
, cpu
, thread
, id
);
504 evsel
->id
[evsel
->ids
++] = id
;
507 int perf_evlist__id_add_fd(struct perf_evlist
*evlist
,
508 struct perf_evsel
*evsel
,
509 int cpu
, int thread
, int fd
)
511 u64 read_data
[4] = { 0, };
512 int id_idx
= 1; /* The first entry is the counter value */
516 ret
= ioctl(fd
, PERF_EVENT_IOC_ID
, &id
);
523 /* Legacy way to get event id.. All hail to old kernels! */
526 * This way does not work with group format read, so bail
529 if (perf_evlist__read_format(evlist
) & PERF_FORMAT_GROUP
)
532 if (!(evsel
->attr
.read_format
& PERF_FORMAT_ID
) ||
533 read(fd
, &read_data
, sizeof(read_data
)) == -1)
536 if (evsel
->attr
.read_format
& PERF_FORMAT_TOTAL_TIME_ENABLED
)
538 if (evsel
->attr
.read_format
& PERF_FORMAT_TOTAL_TIME_RUNNING
)
541 id
= read_data
[id_idx
];
544 perf_evlist__id_add(evlist
, evsel
, cpu
, thread
, id
);
548 static void perf_evlist__set_sid_idx(struct perf_evlist
*evlist
,
549 struct perf_evsel
*evsel
, int idx
, int cpu
,
552 struct perf_sample_id
*sid
= SID(evsel
, cpu
, thread
);
554 if (evlist
->cpus
&& cpu
>= 0)
555 sid
->cpu
= evlist
->cpus
->map
[cpu
];
558 if (!evsel
->system_wide
&& evlist
->threads
&& thread
>= 0)
559 sid
->tid
= thread_map__pid(evlist
->threads
, thread
);
564 struct perf_sample_id
*perf_evlist__id2sid(struct perf_evlist
*evlist
, u64 id
)
566 struct hlist_head
*head
;
567 struct perf_sample_id
*sid
;
570 hash
= hash_64(id
, PERF_EVLIST__HLIST_BITS
);
571 head
= &evlist
->heads
[hash
];
573 hlist_for_each_entry(sid
, head
, node
)
580 struct perf_evsel
*perf_evlist__id2evsel(struct perf_evlist
*evlist
, u64 id
)
582 struct perf_sample_id
*sid
;
584 if (evlist
->nr_entries
== 1 || !id
)
585 return perf_evlist__first(evlist
);
587 sid
= perf_evlist__id2sid(evlist
, id
);
591 if (!perf_evlist__sample_id_all(evlist
))
592 return perf_evlist__first(evlist
);
597 struct perf_evsel
*perf_evlist__id2evsel_strict(struct perf_evlist
*evlist
,
600 struct perf_sample_id
*sid
;
605 sid
= perf_evlist__id2sid(evlist
, id
);
612 static int perf_evlist__event2id(struct perf_evlist
*evlist
,
613 union perf_event
*event
, u64
*id
)
615 const u64
*array
= event
->sample
.array
;
618 n
= (event
->header
.size
- sizeof(event
->header
)) >> 3;
620 if (event
->header
.type
== PERF_RECORD_SAMPLE
) {
621 if (evlist
->id_pos
>= n
)
623 *id
= array
[evlist
->id_pos
];
625 if (evlist
->is_pos
> n
)
633 struct perf_evsel
*perf_evlist__event2evsel(struct perf_evlist
*evlist
,
634 union perf_event
*event
)
636 struct perf_evsel
*first
= perf_evlist__first(evlist
);
637 struct hlist_head
*head
;
638 struct perf_sample_id
*sid
;
642 if (evlist
->nr_entries
== 1)
645 if (!first
->attr
.sample_id_all
&&
646 event
->header
.type
!= PERF_RECORD_SAMPLE
)
649 if (perf_evlist__event2id(evlist
, event
, &id
))
652 /* Synthesized events have an id of zero */
656 hash
= hash_64(id
, PERF_EVLIST__HLIST_BITS
);
657 head
= &evlist
->heads
[hash
];
659 hlist_for_each_entry(sid
, head
, node
) {
666 static int perf_evlist__set_paused(struct perf_evlist
*evlist
, bool value
)
670 if (!evlist
->overwrite_mmap
)
673 for (i
= 0; i
< evlist
->nr_mmaps
; i
++) {
674 int fd
= evlist
->overwrite_mmap
[i
].fd
;
679 err
= ioctl(fd
, PERF_EVENT_IOC_PAUSE_OUTPUT
, value
? 1 : 0);
686 static int perf_evlist__pause(struct perf_evlist
*evlist
)
688 return perf_evlist__set_paused(evlist
, true);
691 static int perf_evlist__resume(struct perf_evlist
*evlist
)
693 return perf_evlist__set_paused(evlist
, false);
696 static void perf_evlist__munmap_nofree(struct perf_evlist
*evlist
)
701 for (i
= 0; i
< evlist
->nr_mmaps
; i
++)
702 perf_mmap__munmap(&evlist
->mmap
[i
]);
704 if (evlist
->overwrite_mmap
)
705 for (i
= 0; i
< evlist
->nr_mmaps
; i
++)
706 perf_mmap__munmap(&evlist
->overwrite_mmap
[i
]);
709 void perf_evlist__munmap(struct perf_evlist
*evlist
)
711 perf_evlist__munmap_nofree(evlist
);
712 zfree(&evlist
->mmap
);
713 zfree(&evlist
->overwrite_mmap
);
716 static struct perf_mmap
*perf_evlist__alloc_mmap(struct perf_evlist
*evlist
,
720 struct perf_mmap
*map
;
722 evlist
->nr_mmaps
= cpu_map__nr(evlist
->cpus
);
723 if (cpu_map__empty(evlist
->cpus
))
724 evlist
->nr_mmaps
= thread_map__nr(evlist
->threads
);
725 map
= zalloc(evlist
->nr_mmaps
* sizeof(struct perf_mmap
));
729 for (i
= 0; i
< evlist
->nr_mmaps
; i
++) {
731 map
[i
].overwrite
= overwrite
;
733 * When the perf_mmap() call is made we grab one refcount, plus
734 * one extra to let perf_mmap__consume() get the last
735 * events after all real references (perf_mmap__get()) are
738 * Each PERF_EVENT_IOC_SET_OUTPUT points to this mmap and
739 * thus does perf_mmap__get() on it.
741 refcount_set(&map
[i
].refcnt
, 0);
747 perf_evlist__should_poll(struct perf_evlist
*evlist __maybe_unused
,
748 struct perf_evsel
*evsel
)
750 if (evsel
->attr
.write_backward
)
755 static int perf_evlist__mmap_per_evsel(struct perf_evlist
*evlist
, int idx
,
756 struct mmap_params
*mp
, int cpu_idx
,
757 int thread
, int *_output
, int *_output_overwrite
)
759 struct perf_evsel
*evsel
;
761 int evlist_cpu
= cpu_map__cpu(evlist
->cpus
, cpu_idx
);
763 evlist__for_each_entry(evlist
, evsel
) {
764 struct perf_mmap
*maps
= evlist
->mmap
;
765 int *output
= _output
;
769 mp
->prot
= PROT_READ
| PROT_WRITE
;
770 if (evsel
->attr
.write_backward
) {
771 output
= _output_overwrite
;
772 maps
= evlist
->overwrite_mmap
;
775 maps
= perf_evlist__alloc_mmap(evlist
, true);
778 evlist
->overwrite_mmap
= maps
;
779 if (evlist
->bkw_mmap_state
== BKW_MMAP_NOTREADY
)
780 perf_evlist__toggle_bkw_mmap(evlist
, BKW_MMAP_RUNNING
);
782 mp
->prot
&= ~PROT_WRITE
;
785 if (evsel
->system_wide
&& thread
)
788 cpu
= cpu_map__idx(evsel
->cpus
, evlist_cpu
);
792 fd
= FD(evsel
, cpu
, thread
);
797 if (perf_mmap__mmap(&maps
[idx
], mp
, *output
, evlist_cpu
) < 0)
800 if (ioctl(fd
, PERF_EVENT_IOC_SET_OUTPUT
, *output
) != 0)
803 perf_mmap__get(&maps
[idx
]);
806 revent
= perf_evlist__should_poll(evlist
, evsel
) ? POLLIN
: 0;
809 * The system_wide flag causes a selected event to be opened
810 * always without a pid. Consequently it will never get a
811 * POLLHUP, but it is used for tracking in combination with
812 * other events, so it should not need to be polled anyway.
813 * Therefore don't add it for polling.
815 if (!evsel
->system_wide
&&
816 __perf_evlist__add_pollfd(evlist
, fd
, &maps
[idx
], revent
) < 0) {
817 perf_mmap__put(&maps
[idx
]);
821 if (evsel
->attr
.read_format
& PERF_FORMAT_ID
) {
822 if (perf_evlist__id_add_fd(evlist
, evsel
, cpu
, thread
,
825 perf_evlist__set_sid_idx(evlist
, evsel
, idx
, cpu
,
833 static int perf_evlist__mmap_per_cpu(struct perf_evlist
*evlist
,
834 struct mmap_params
*mp
)
837 int nr_cpus
= cpu_map__nr(evlist
->cpus
);
838 int nr_threads
= thread_map__nr(evlist
->threads
);
840 pr_debug2("perf event ring buffer mmapped per cpu\n");
841 for (cpu
= 0; cpu
< nr_cpus
; cpu
++) {
843 int output_overwrite
= -1;
845 auxtrace_mmap_params__set_idx(&mp
->auxtrace_mp
, evlist
, cpu
,
848 for (thread
= 0; thread
< nr_threads
; thread
++) {
849 if (perf_evlist__mmap_per_evsel(evlist
, cpu
, mp
, cpu
,
850 thread
, &output
, &output_overwrite
))
858 perf_evlist__munmap_nofree(evlist
);
862 static int perf_evlist__mmap_per_thread(struct perf_evlist
*evlist
,
863 struct mmap_params
*mp
)
866 int nr_threads
= thread_map__nr(evlist
->threads
);
868 pr_debug2("perf event ring buffer mmapped per thread\n");
869 for (thread
= 0; thread
< nr_threads
; thread
++) {
871 int output_overwrite
= -1;
873 auxtrace_mmap_params__set_idx(&mp
->auxtrace_mp
, evlist
, thread
,
876 if (perf_evlist__mmap_per_evsel(evlist
, thread
, mp
, 0, thread
,
877 &output
, &output_overwrite
))
884 perf_evlist__munmap_nofree(evlist
);
888 unsigned long perf_event_mlock_kb_in_pages(void)
893 if (sysctl__read_int("kernel/perf_event_mlock_kb", &max
) < 0) {
895 * Pick a once upon a time good value, i.e. things look
896 * strange since we can't read a sysctl value, but lets not
901 max
-= (page_size
/ 1024);
904 pages
= (max
* 1024) / page_size
;
905 if (!is_power_of_2(pages
))
906 pages
= rounddown_pow_of_two(pages
);
911 size_t perf_evlist__mmap_size(unsigned long pages
)
913 if (pages
== UINT_MAX
)
914 pages
= perf_event_mlock_kb_in_pages();
915 else if (!is_power_of_2(pages
))
918 return (pages
+ 1) * page_size
;
921 static long parse_pages_arg(const char *str
, unsigned long min
,
924 unsigned long pages
, val
;
925 static struct parse_tag tags
[] = {
926 { .tag
= 'B', .mult
= 1 },
927 { .tag
= 'K', .mult
= 1 << 10 },
928 { .tag
= 'M', .mult
= 1 << 20 },
929 { .tag
= 'G', .mult
= 1 << 30 },
936 val
= parse_tag_value(str
, tags
);
937 if (val
!= (unsigned long) -1) {
938 /* we got file size value */
939 pages
= PERF_ALIGN(val
, page_size
) / page_size
;
941 /* we got pages count value */
943 pages
= strtoul(str
, &eptr
, 10);
948 if (pages
== 0 && min
== 0) {
949 /* leave number of pages at 0 */
950 } else if (!is_power_of_2(pages
)) {
953 /* round pages up to next power of 2 */
954 pages
= roundup_pow_of_two(pages
);
958 unit_number__scnprintf(buf
, sizeof(buf
), pages
* page_size
);
959 pr_info("rounding mmap pages size to %s (%lu pages)\n",
969 int __perf_evlist__parse_mmap_pages(unsigned int *mmap_pages
, const char *str
)
971 unsigned long max
= UINT_MAX
;
974 if (max
> SIZE_MAX
/ page_size
)
975 max
= SIZE_MAX
/ page_size
;
977 pages
= parse_pages_arg(str
, 1, max
);
979 pr_err("Invalid argument for --mmap_pages/-m\n");
987 int perf_evlist__parse_mmap_pages(const struct option
*opt
, const char *str
,
988 int unset __maybe_unused
)
990 return __perf_evlist__parse_mmap_pages(opt
->value
, str
);
994 * perf_evlist__mmap_ex - Create mmaps to receive events.
995 * @evlist: list of events
996 * @pages: map length in pages
997 * @overwrite: overwrite older events?
998 * @auxtrace_pages - auxtrace map length in pages
999 * @auxtrace_overwrite - overwrite older auxtrace data?
1001 * If @overwrite is %false the user needs to signal event consumption using
1002 * perf_mmap__write_tail(). Using perf_evlist__mmap_read() does this
1005 * Similarly, if @auxtrace_overwrite is %false the user needs to signal data
1006 * consumption using auxtrace_mmap__write_tail().
1008 * Return: %0 on success, negative error code otherwise.
1010 int perf_evlist__mmap_ex(struct perf_evlist
*evlist
, unsigned int pages
,
1011 unsigned int auxtrace_pages
,
1012 bool auxtrace_overwrite
, int nr_cblocks
, int affinity
)
1014 struct perf_evsel
*evsel
;
1015 const struct cpu_map
*cpus
= evlist
->cpus
;
1016 const struct thread_map
*threads
= evlist
->threads
;
1018 * Delay setting mp.prot: set it before calling perf_mmap__mmap.
1019 * Its value is decided by evsel's write_backward.
1020 * So &mp should not be passed through const pointer.
1022 struct mmap_params mp
= { .nr_cblocks
= nr_cblocks
, .affinity
= affinity
};
1025 evlist
->mmap
= perf_evlist__alloc_mmap(evlist
, false);
1029 if (evlist
->pollfd
.entries
== NULL
&& perf_evlist__alloc_pollfd(evlist
) < 0)
1032 evlist
->mmap_len
= perf_evlist__mmap_size(pages
);
1033 pr_debug("mmap size %zuB\n", evlist
->mmap_len
);
1034 mp
.mask
= evlist
->mmap_len
- page_size
- 1;
1036 auxtrace_mmap_params__init(&mp
.auxtrace_mp
, evlist
->mmap_len
,
1037 auxtrace_pages
, auxtrace_overwrite
);
1039 evlist__for_each_entry(evlist
, evsel
) {
1040 if ((evsel
->attr
.read_format
& PERF_FORMAT_ID
) &&
1041 evsel
->sample_id
== NULL
&&
1042 perf_evsel__alloc_id(evsel
, cpu_map__nr(cpus
), threads
->nr
) < 0)
1046 if (cpu_map__empty(cpus
))
1047 return perf_evlist__mmap_per_thread(evlist
, &mp
);
1049 return perf_evlist__mmap_per_cpu(evlist
, &mp
);
1052 int perf_evlist__mmap(struct perf_evlist
*evlist
, unsigned int pages
)
1054 return perf_evlist__mmap_ex(evlist
, pages
, 0, false, 0, PERF_AFFINITY_SYS
);
1057 int perf_evlist__create_maps(struct perf_evlist
*evlist
, struct target
*target
)
1059 bool all_threads
= (target
->per_thread
&& target
->system_wide
);
1060 struct cpu_map
*cpus
;
1061 struct thread_map
*threads
;
1064 * If specify '-a' and '--per-thread' to perf record, perf record
1065 * will override '--per-thread'. target->per_thread = false and
1066 * target->system_wide = true.
1068 * If specify '--per-thread' only to perf record,
1069 * target->per_thread = true and target->system_wide = false.
1071 * So target->per_thread && target->system_wide is false.
1072 * For perf record, thread_map__new_str doesn't call
1073 * thread_map__new_all_cpus. That will keep perf record's
1076 * For perf stat, it allows the case that target->per_thread and
1077 * target->system_wide are all true. It means to collect system-wide
1078 * per-thread data. thread_map__new_str will call
1079 * thread_map__new_all_cpus to enumerate all threads.
1081 threads
= thread_map__new_str(target
->pid
, target
->tid
, target
->uid
,
1087 if (target__uses_dummy_map(target
))
1088 cpus
= cpu_map__dummy_new();
1090 cpus
= cpu_map__new(target
->cpu_list
);
1093 goto out_delete_threads
;
1095 evlist
->has_user_cpus
= !!target
->cpu_list
;
1097 perf_evlist__set_maps(evlist
, cpus
, threads
);
1102 thread_map__put(threads
);
1106 void perf_evlist__set_maps(struct perf_evlist
*evlist
, struct cpu_map
*cpus
,
1107 struct thread_map
*threads
)
1110 * Allow for the possibility that one or another of the maps isn't being
1111 * changed i.e. don't put it. Note we are assuming the maps that are
1112 * being applied are brand new and evlist is taking ownership of the
1113 * original reference count of 1. If that is not the case it is up to
1114 * the caller to increase the reference count.
1116 if (cpus
!= evlist
->cpus
) {
1117 cpu_map__put(evlist
->cpus
);
1118 evlist
->cpus
= cpu_map__get(cpus
);
1121 if (threads
!= evlist
->threads
) {
1122 thread_map__put(evlist
->threads
);
1123 evlist
->threads
= thread_map__get(threads
);
1126 perf_evlist__propagate_maps(evlist
);
1129 void __perf_evlist__set_sample_bit(struct perf_evlist
*evlist
,
1130 enum perf_event_sample_format bit
)
1132 struct perf_evsel
*evsel
;
1134 evlist__for_each_entry(evlist
, evsel
)
1135 __perf_evsel__set_sample_bit(evsel
, bit
);
1138 void __perf_evlist__reset_sample_bit(struct perf_evlist
*evlist
,
1139 enum perf_event_sample_format bit
)
1141 struct perf_evsel
*evsel
;
1143 evlist__for_each_entry(evlist
, evsel
)
1144 __perf_evsel__reset_sample_bit(evsel
, bit
);
1147 int perf_evlist__apply_filters(struct perf_evlist
*evlist
, struct perf_evsel
**err_evsel
)
1149 struct perf_evsel
*evsel
;
1152 evlist__for_each_entry(evlist
, evsel
) {
1153 if (evsel
->filter
== NULL
)
1157 * filters only work for tracepoint event, which doesn't have cpu limit.
1158 * So evlist and evsel should always be same.
1160 err
= perf_evsel__apply_filter(evsel
, evsel
->filter
);
1170 int perf_evlist__set_tp_filter(struct perf_evlist
*evlist
, const char *filter
)
1172 struct perf_evsel
*evsel
;
1175 evlist__for_each_entry(evlist
, evsel
) {
1176 if (evsel
->attr
.type
!= PERF_TYPE_TRACEPOINT
)
1179 err
= perf_evsel__set_filter(evsel
, filter
);
1187 int perf_evlist__set_tp_filter_pids(struct perf_evlist
*evlist
, size_t npids
, pid_t
*pids
)
1193 for (i
= 0; i
< npids
; ++i
) {
1195 if (asprintf(&filter
, "common_pid != %d", pids
[i
]) < 0)
1200 if (asprintf(&tmp
, "%s && common_pid != %d", filter
, pids
[i
]) < 0)
1208 ret
= perf_evlist__set_tp_filter(evlist
, filter
);
1214 int perf_evlist__set_tp_filter_pid(struct perf_evlist
*evlist
, pid_t pid
)
1216 return perf_evlist__set_tp_filter_pids(evlist
, 1, &pid
);
1219 bool perf_evlist__valid_sample_type(struct perf_evlist
*evlist
)
1221 struct perf_evsel
*pos
;
1223 if (evlist
->nr_entries
== 1)
1226 if (evlist
->id_pos
< 0 || evlist
->is_pos
< 0)
1229 evlist__for_each_entry(evlist
, pos
) {
1230 if (pos
->id_pos
!= evlist
->id_pos
||
1231 pos
->is_pos
!= evlist
->is_pos
)
1238 u64
__perf_evlist__combined_sample_type(struct perf_evlist
*evlist
)
1240 struct perf_evsel
*evsel
;
1242 if (evlist
->combined_sample_type
)
1243 return evlist
->combined_sample_type
;
1245 evlist__for_each_entry(evlist
, evsel
)
1246 evlist
->combined_sample_type
|= evsel
->attr
.sample_type
;
1248 return evlist
->combined_sample_type
;
1251 u64
perf_evlist__combined_sample_type(struct perf_evlist
*evlist
)
1253 evlist
->combined_sample_type
= 0;
1254 return __perf_evlist__combined_sample_type(evlist
);
1257 u64
perf_evlist__combined_branch_type(struct perf_evlist
*evlist
)
1259 struct perf_evsel
*evsel
;
1260 u64 branch_type
= 0;
1262 evlist__for_each_entry(evlist
, evsel
)
1263 branch_type
|= evsel
->attr
.branch_sample_type
;
1267 bool perf_evlist__valid_read_format(struct perf_evlist
*evlist
)
1269 struct perf_evsel
*first
= perf_evlist__first(evlist
), *pos
= first
;
1270 u64 read_format
= first
->attr
.read_format
;
1271 u64 sample_type
= first
->attr
.sample_type
;
1273 evlist__for_each_entry(evlist
, pos
) {
1274 if (read_format
!= pos
->attr
.read_format
)
1278 /* PERF_SAMPLE_READ imples PERF_FORMAT_ID. */
1279 if ((sample_type
& PERF_SAMPLE_READ
) &&
1280 !(read_format
& PERF_FORMAT_ID
)) {
1287 u64
perf_evlist__read_format(struct perf_evlist
*evlist
)
1289 struct perf_evsel
*first
= perf_evlist__first(evlist
);
1290 return first
->attr
.read_format
;
1293 u16
perf_evlist__id_hdr_size(struct perf_evlist
*evlist
)
1295 struct perf_evsel
*first
= perf_evlist__first(evlist
);
1296 struct perf_sample
*data
;
1300 if (!first
->attr
.sample_id_all
)
1303 sample_type
= first
->attr
.sample_type
;
1305 if (sample_type
& PERF_SAMPLE_TID
)
1306 size
+= sizeof(data
->tid
) * 2;
1308 if (sample_type
& PERF_SAMPLE_TIME
)
1309 size
+= sizeof(data
->time
);
1311 if (sample_type
& PERF_SAMPLE_ID
)
1312 size
+= sizeof(data
->id
);
1314 if (sample_type
& PERF_SAMPLE_STREAM_ID
)
1315 size
+= sizeof(data
->stream_id
);
1317 if (sample_type
& PERF_SAMPLE_CPU
)
1318 size
+= sizeof(data
->cpu
) * 2;
1320 if (sample_type
& PERF_SAMPLE_IDENTIFIER
)
1321 size
+= sizeof(data
->id
);
1326 bool perf_evlist__valid_sample_id_all(struct perf_evlist
*evlist
)
1328 struct perf_evsel
*first
= perf_evlist__first(evlist
), *pos
= first
;
1330 evlist__for_each_entry_continue(evlist
, pos
) {
1331 if (first
->attr
.sample_id_all
!= pos
->attr
.sample_id_all
)
1338 bool perf_evlist__sample_id_all(struct perf_evlist
*evlist
)
1340 struct perf_evsel
*first
= perf_evlist__first(evlist
);
1341 return first
->attr
.sample_id_all
;
1344 void perf_evlist__set_selected(struct perf_evlist
*evlist
,
1345 struct perf_evsel
*evsel
)
1347 evlist
->selected
= evsel
;
1350 void perf_evlist__close(struct perf_evlist
*evlist
)
1352 struct perf_evsel
*evsel
;
1354 evlist__for_each_entry_reverse(evlist
, evsel
)
1355 perf_evsel__close(evsel
);
1358 static int perf_evlist__create_syswide_maps(struct perf_evlist
*evlist
)
1360 struct cpu_map
*cpus
;
1361 struct thread_map
*threads
;
1365 * Try reading /sys/devices/system/cpu/online to get
1368 * FIXME: -ENOMEM is the best we can do here, the cpu_map
1369 * code needs an overhaul to properly forward the
1370 * error, and we may not want to do that fallback to a
1371 * default cpu identity map :-\
1373 cpus
= cpu_map__new(NULL
);
1377 threads
= thread_map__new_dummy();
1381 perf_evlist__set_maps(evlist
, cpus
, threads
);
1389 int perf_evlist__open(struct perf_evlist
*evlist
)
1391 struct perf_evsel
*evsel
;
1395 * Default: one fd per CPU, all threads, aka systemwide
1396 * as sys_perf_event_open(cpu = -1, thread = -1) is EINVAL
1398 if (evlist
->threads
== NULL
&& evlist
->cpus
== NULL
) {
1399 err
= perf_evlist__create_syswide_maps(evlist
);
1404 perf_evlist__update_id_pos(evlist
);
1406 evlist__for_each_entry(evlist
, evsel
) {
1407 err
= perf_evsel__open(evsel
, evsel
->cpus
, evsel
->threads
);
1414 perf_evlist__close(evlist
);
1419 int perf_evlist__prepare_workload(struct perf_evlist
*evlist
, struct target
*target
,
1420 const char *argv
[], bool pipe_output
,
1421 void (*exec_error
)(int signo
, siginfo_t
*info
, void *ucontext
))
1423 int child_ready_pipe
[2], go_pipe
[2];
1426 if (pipe(child_ready_pipe
) < 0) {
1427 perror("failed to create 'ready' pipe");
1431 if (pipe(go_pipe
) < 0) {
1432 perror("failed to create 'go' pipe");
1433 goto out_close_ready_pipe
;
1436 evlist
->workload
.pid
= fork();
1437 if (evlist
->workload
.pid
< 0) {
1438 perror("failed to fork");
1439 goto out_close_pipes
;
1442 if (!evlist
->workload
.pid
) {
1448 signal(SIGTERM
, SIG_DFL
);
1450 close(child_ready_pipe
[0]);
1452 fcntl(go_pipe
[0], F_SETFD
, FD_CLOEXEC
);
1455 * Tell the parent we're ready to go
1457 close(child_ready_pipe
[1]);
1460 * Wait until the parent tells us to go.
1462 ret
= read(go_pipe
[0], &bf
, 1);
1464 * The parent will ask for the execvp() to be performed by
1465 * writing exactly one byte, in workload.cork_fd, usually via
1466 * perf_evlist__start_workload().
1468 * For cancelling the workload without actually running it,
1469 * the parent will just close workload.cork_fd, without writing
1470 * anything, i.e. read will return zero and we just exit()
1475 perror("unable to read pipe");
1479 execvp(argv
[0], (char **)argv
);
1484 val
.sival_int
= errno
;
1485 if (sigqueue(getppid(), SIGUSR1
, val
))
1493 struct sigaction act
= {
1494 .sa_flags
= SA_SIGINFO
,
1495 .sa_sigaction
= exec_error
,
1497 sigaction(SIGUSR1
, &act
, NULL
);
1500 if (target__none(target
)) {
1501 if (evlist
->threads
== NULL
) {
1502 fprintf(stderr
, "FATAL: evlist->threads need to be set at this point (%s:%d).\n",
1503 __func__
, __LINE__
);
1504 goto out_close_pipes
;
1506 thread_map__set_pid(evlist
->threads
, 0, evlist
->workload
.pid
);
1509 close(child_ready_pipe
[1]);
1512 * wait for child to settle
1514 if (read(child_ready_pipe
[0], &bf
, 1) == -1) {
1515 perror("unable to read pipe");
1516 goto out_close_pipes
;
1519 fcntl(go_pipe
[1], F_SETFD
, FD_CLOEXEC
);
1520 evlist
->workload
.cork_fd
= go_pipe
[1];
1521 close(child_ready_pipe
[0]);
1527 out_close_ready_pipe
:
1528 close(child_ready_pipe
[0]);
1529 close(child_ready_pipe
[1]);
1533 int perf_evlist__start_workload(struct perf_evlist
*evlist
)
1535 if (evlist
->workload
.cork_fd
> 0) {
1539 * Remove the cork, let it rip!
1541 ret
= write(evlist
->workload
.cork_fd
, &bf
, 1);
1543 perror("unable to write to pipe");
1545 close(evlist
->workload
.cork_fd
);
1552 int perf_evlist__parse_sample(struct perf_evlist
*evlist
, union perf_event
*event
,
1553 struct perf_sample
*sample
)
1555 struct perf_evsel
*evsel
= perf_evlist__event2evsel(evlist
, event
);
1559 return perf_evsel__parse_sample(evsel
, event
, sample
);
1562 int perf_evlist__parse_sample_timestamp(struct perf_evlist
*evlist
,
1563 union perf_event
*event
,
1566 struct perf_evsel
*evsel
= perf_evlist__event2evsel(evlist
, event
);
1570 return perf_evsel__parse_sample_timestamp(evsel
, event
, timestamp
);
1573 size_t perf_evlist__fprintf(struct perf_evlist
*evlist
, FILE *fp
)
1575 struct perf_evsel
*evsel
;
1578 evlist__for_each_entry(evlist
, evsel
) {
1579 printed
+= fprintf(fp
, "%s%s", evsel
->idx
? ", " : "",
1580 perf_evsel__name(evsel
));
1583 return printed
+ fprintf(fp
, "\n");
1586 int perf_evlist__strerror_open(struct perf_evlist
*evlist
,
1587 int err
, char *buf
, size_t size
)
1590 char sbuf
[STRERR_BUFSIZE
], *emsg
= str_error_r(err
, sbuf
, sizeof(sbuf
));
1595 printed
= scnprintf(buf
, size
,
1597 "Hint:\tCheck /proc/sys/kernel/perf_event_paranoid setting.", emsg
);
1599 value
= perf_event_paranoid();
1601 printed
+= scnprintf(buf
+ printed
, size
- printed
, "\nHint:\t");
1604 printed
+= scnprintf(buf
+ printed
, size
- printed
,
1605 "For your workloads it needs to be <= 1\nHint:\t");
1607 printed
+= scnprintf(buf
+ printed
, size
- printed
,
1608 "For system wide tracing it needs to be set to -1.\n");
1610 printed
+= scnprintf(buf
+ printed
, size
- printed
,
1611 "Hint:\tTry: 'sudo sh -c \"echo -1 > /proc/sys/kernel/perf_event_paranoid\"'\n"
1612 "Hint:\tThe current value is %d.", value
);
1615 struct perf_evsel
*first
= perf_evlist__first(evlist
);
1618 if (sysctl__read_int("kernel/perf_event_max_sample_rate", &max_freq
) < 0)
1621 if (first
->attr
.sample_freq
< (u64
)max_freq
)
1624 printed
= scnprintf(buf
, size
,
1626 "Hint:\tCheck /proc/sys/kernel/perf_event_max_sample_rate.\n"
1627 "Hint:\tThe current value is %d and %" PRIu64
" is being requested.",
1628 emsg
, max_freq
, first
->attr
.sample_freq
);
1633 scnprintf(buf
, size
, "%s", emsg
);
1640 int perf_evlist__strerror_mmap(struct perf_evlist
*evlist
, int err
, char *buf
, size_t size
)
1642 char sbuf
[STRERR_BUFSIZE
], *emsg
= str_error_r(err
, sbuf
, sizeof(sbuf
));
1643 int pages_attempted
= evlist
->mmap_len
/ 1024, pages_max_per_user
, printed
= 0;
1647 sysctl__read_int("kernel/perf_event_mlock_kb", &pages_max_per_user
);
1648 printed
+= scnprintf(buf
+ printed
, size
- printed
,
1650 "Hint:\tCheck /proc/sys/kernel/perf_event_mlock_kb (%d kB) setting.\n"
1651 "Hint:\tTried using %zd kB.\n",
1652 emsg
, pages_max_per_user
, pages_attempted
);
1654 if (pages_attempted
>= pages_max_per_user
) {
1655 printed
+= scnprintf(buf
+ printed
, size
- printed
,
1656 "Hint:\tTry 'sudo sh -c \"echo %d > /proc/sys/kernel/perf_event_mlock_kb\"', or\n",
1657 pages_max_per_user
+ pages_attempted
);
1660 printed
+= scnprintf(buf
+ printed
, size
- printed
,
1661 "Hint:\tTry using a smaller -m/--mmap-pages value.");
1664 scnprintf(buf
, size
, "%s", emsg
);
1671 void perf_evlist__to_front(struct perf_evlist
*evlist
,
1672 struct perf_evsel
*move_evsel
)
1674 struct perf_evsel
*evsel
, *n
;
1677 if (move_evsel
== perf_evlist__first(evlist
))
1680 evlist__for_each_entry_safe(evlist
, n
, evsel
) {
1681 if (evsel
->leader
== move_evsel
->leader
)
1682 list_move_tail(&evsel
->node
, &move
);
1685 list_splice(&move
, &evlist
->entries
);
1688 void perf_evlist__set_tracking_event(struct perf_evlist
*evlist
,
1689 struct perf_evsel
*tracking_evsel
)
1691 struct perf_evsel
*evsel
;
1693 if (tracking_evsel
->tracking
)
1696 evlist__for_each_entry(evlist
, evsel
) {
1697 if (evsel
!= tracking_evsel
)
1698 evsel
->tracking
= false;
1701 tracking_evsel
->tracking
= true;
1705 perf_evlist__find_evsel_by_str(struct perf_evlist
*evlist
,
1708 struct perf_evsel
*evsel
;
1710 evlist__for_each_entry(evlist
, evsel
) {
1713 if (strcmp(str
, evsel
->name
) == 0)
1720 void perf_evlist__toggle_bkw_mmap(struct perf_evlist
*evlist
,
1721 enum bkw_mmap_state state
)
1723 enum bkw_mmap_state old_state
= evlist
->bkw_mmap_state
;
1730 if (!evlist
->overwrite_mmap
)
1733 switch (old_state
) {
1734 case BKW_MMAP_NOTREADY
: {
1735 if (state
!= BKW_MMAP_RUNNING
)
1739 case BKW_MMAP_RUNNING
: {
1740 if (state
!= BKW_MMAP_DATA_PENDING
)
1745 case BKW_MMAP_DATA_PENDING
: {
1746 if (state
!= BKW_MMAP_EMPTY
)
1750 case BKW_MMAP_EMPTY
: {
1751 if (state
!= BKW_MMAP_RUNNING
)
1757 WARN_ONCE(1, "Shouldn't get there\n");
1760 evlist
->bkw_mmap_state
= state
;
1764 perf_evlist__pause(evlist
);
1767 perf_evlist__resume(evlist
);
1778 bool perf_evlist__exclude_kernel(struct perf_evlist
*evlist
)
1780 struct perf_evsel
*evsel
;
1782 evlist__for_each_entry(evlist
, evsel
) {
1783 if (!evsel
->attr
.exclude_kernel
)
1791 * Events in data file are not collect in groups, but we still want
1792 * the group display. Set the artificial group and set the leader's
1793 * forced_leader flag to notify the display code.
1795 void perf_evlist__force_leader(struct perf_evlist
*evlist
)
1797 if (!evlist
->nr_groups
) {
1798 struct perf_evsel
*leader
= perf_evlist__first(evlist
);
1800 perf_evlist__set_leader(evlist
);
1801 leader
->forced_leader
= true;
1805 struct perf_evsel
*perf_evlist__reset_weak_group(struct perf_evlist
*evsel_list
,
1806 struct perf_evsel
*evsel
)
1808 struct perf_evsel
*c2
, *leader
;
1809 bool is_open
= true;
1811 leader
= evsel
->leader
;
1812 pr_debug("Weak group for %s/%d failed\n",
1813 leader
->name
, leader
->nr_members
);
1816 * for_each_group_member doesn't work here because it doesn't
1817 * include the first entry.
1819 evlist__for_each_entry(evsel_list
, c2
) {
1822 if (c2
->leader
== leader
) {
1824 perf_evsel__close(c2
);
1832 int perf_evlist__add_sb_event(struct perf_evlist
**evlist
,
1833 struct perf_event_attr
*attr
,
1834 perf_evsel__sb_cb_t cb
,
1837 struct perf_evsel
*evsel
;
1838 bool new_evlist
= (*evlist
) == NULL
;
1840 if (*evlist
== NULL
)
1841 *evlist
= perf_evlist__new();
1842 if (*evlist
== NULL
)
1845 if (!attr
->sample_id_all
) {
1846 pr_warning("enabling sample_id_all for all side band events\n");
1847 attr
->sample_id_all
= 1;
1850 evsel
= perf_evsel__new_idx(attr
, (*evlist
)->nr_entries
);
1854 evsel
->side_band
.cb
= cb
;
1855 evsel
->side_band
.data
= data
;
1856 perf_evlist__add(*evlist
, evsel
);
1861 perf_evlist__delete(*evlist
);
1867 static void *perf_evlist__poll_thread(void *arg
)
1869 struct perf_evlist
*evlist
= arg
;
1870 bool draining
= false;
1874 bool got_data
= false;
1876 if (evlist
->thread
.done
)
1880 perf_evlist__poll(evlist
, 1000);
1882 for (i
= 0; i
< evlist
->nr_mmaps
; i
++) {
1883 struct perf_mmap
*map
= &evlist
->mmap
[i
];
1884 union perf_event
*event
;
1886 if (perf_mmap__read_init(map
))
1888 while ((event
= perf_mmap__read_event(map
)) != NULL
) {
1889 struct perf_evsel
*evsel
= perf_evlist__event2evsel(evlist
, event
);
1891 if (evsel
&& evsel
->side_band
.cb
)
1892 evsel
->side_band
.cb(event
, evsel
->side_band
.data
);
1894 pr_warning("cannot locate proper evsel for the side band event\n");
1896 perf_mmap__consume(map
);
1899 perf_mmap__read_done(map
);
1902 if (draining
&& !got_data
)
1908 int perf_evlist__start_sb_thread(struct perf_evlist
*evlist
,
1909 struct target
*target
)
1911 struct perf_evsel
*counter
;
1916 if (perf_evlist__create_maps(evlist
, target
))
1917 goto out_delete_evlist
;
1919 evlist__for_each_entry(evlist
, counter
) {
1920 if (perf_evsel__open(counter
, evlist
->cpus
,
1921 evlist
->threads
) < 0)
1922 goto out_delete_evlist
;
1925 if (perf_evlist__mmap(evlist
, UINT_MAX
))
1926 goto out_delete_evlist
;
1928 evlist__for_each_entry(evlist
, counter
) {
1929 if (perf_evsel__enable(counter
))
1930 goto out_delete_evlist
;
1933 evlist
->thread
.done
= 0;
1934 if (pthread_create(&evlist
->thread
.th
, NULL
, perf_evlist__poll_thread
, evlist
))
1935 goto out_delete_evlist
;
1940 perf_evlist__delete(evlist
);
1945 void perf_evlist__stop_sb_thread(struct perf_evlist
*evlist
)
1949 evlist
->thread
.done
= 1;
1950 pthread_join(evlist
->thread
.th
, NULL
);
1951 perf_evlist__delete(evlist
);