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/debugfs.h>
13 #include "thread_map.h"
20 #include "parse-events.h"
21 #include "parse-options.h"
25 #include <linux/bitops.h>
26 #include <linux/hash.h>
28 #define FD(e, x, y) (*(int *)xyarray__entry(e->fd, x, y))
29 #define SID(e, x, y) xyarray__entry(e->sample_id, x, y)
31 void perf_evlist__init(struct perf_evlist
*evlist
, struct cpu_map
*cpus
,
32 struct thread_map
*threads
)
36 for (i
= 0; i
< PERF_EVLIST__HLIST_SIZE
; ++i
)
37 INIT_HLIST_HEAD(&evlist
->heads
[i
]);
38 INIT_LIST_HEAD(&evlist
->entries
);
39 perf_evlist__set_maps(evlist
, cpus
, threads
);
40 evlist
->workload
.pid
= -1;
43 struct perf_evlist
*perf_evlist__new(void)
45 struct perf_evlist
*evlist
= zalloc(sizeof(*evlist
));
48 perf_evlist__init(evlist
, NULL
, NULL
);
53 struct perf_evlist
*perf_evlist__new_default(void)
55 struct perf_evlist
*evlist
= perf_evlist__new();
57 if (evlist
&& perf_evlist__add_default(evlist
)) {
58 perf_evlist__delete(evlist
);
66 * perf_evlist__set_id_pos - set the positions of event ids.
67 * @evlist: selected event list
69 * Events with compatible sample types all have the same id_pos
70 * and is_pos. For convenience, put a copy on evlist.
72 void perf_evlist__set_id_pos(struct perf_evlist
*evlist
)
74 struct perf_evsel
*first
= perf_evlist__first(evlist
);
76 evlist
->id_pos
= first
->id_pos
;
77 evlist
->is_pos
= first
->is_pos
;
80 static void perf_evlist__update_id_pos(struct perf_evlist
*evlist
)
82 struct perf_evsel
*evsel
;
84 evlist__for_each(evlist
, evsel
)
85 perf_evsel__calc_id_pos(evsel
);
87 perf_evlist__set_id_pos(evlist
);
90 static void perf_evlist__purge(struct perf_evlist
*evlist
)
92 struct perf_evsel
*pos
, *n
;
94 evlist__for_each_safe(evlist
, n
, pos
) {
95 list_del_init(&pos
->node
);
96 perf_evsel__delete(pos
);
99 evlist
->nr_entries
= 0;
102 void perf_evlist__exit(struct perf_evlist
*evlist
)
104 zfree(&evlist
->mmap
);
105 zfree(&evlist
->pollfd
);
108 void perf_evlist__delete(struct perf_evlist
*evlist
)
110 perf_evlist__munmap(evlist
);
111 perf_evlist__close(evlist
);
112 cpu_map__delete(evlist
->cpus
);
113 thread_map__delete(evlist
->threads
);
115 evlist
->threads
= NULL
;
116 perf_evlist__purge(evlist
);
117 perf_evlist__exit(evlist
);
121 void perf_evlist__add(struct perf_evlist
*evlist
, struct perf_evsel
*entry
)
123 list_add_tail(&entry
->node
, &evlist
->entries
);
124 entry
->idx
= evlist
->nr_entries
;
126 if (!evlist
->nr_entries
++)
127 perf_evlist__set_id_pos(evlist
);
130 void perf_evlist__splice_list_tail(struct perf_evlist
*evlist
,
131 struct list_head
*list
,
134 bool set_id_pos
= !evlist
->nr_entries
;
136 list_splice_tail(list
, &evlist
->entries
);
137 evlist
->nr_entries
+= nr_entries
;
139 perf_evlist__set_id_pos(evlist
);
142 void __perf_evlist__set_leader(struct list_head
*list
)
144 struct perf_evsel
*evsel
, *leader
;
146 leader
= list_entry(list
->next
, struct perf_evsel
, node
);
147 evsel
= list_entry(list
->prev
, struct perf_evsel
, node
);
149 leader
->nr_members
= evsel
->idx
- leader
->idx
+ 1;
151 __evlist__for_each(list
, evsel
) {
152 evsel
->leader
= leader
;
156 void perf_evlist__set_leader(struct perf_evlist
*evlist
)
158 if (evlist
->nr_entries
) {
159 evlist
->nr_groups
= evlist
->nr_entries
> 1 ? 1 : 0;
160 __perf_evlist__set_leader(&evlist
->entries
);
164 int perf_evlist__add_default(struct perf_evlist
*evlist
)
166 struct perf_event_attr attr
= {
167 .type
= PERF_TYPE_HARDWARE
,
168 .config
= PERF_COUNT_HW_CPU_CYCLES
,
170 struct perf_evsel
*evsel
;
172 event_attr_init(&attr
);
174 evsel
= perf_evsel__new(&attr
);
178 /* use strdup() because free(evsel) assumes name is allocated */
179 evsel
->name
= strdup("cycles");
183 perf_evlist__add(evlist
, evsel
);
186 perf_evsel__delete(evsel
);
191 static int perf_evlist__add_attrs(struct perf_evlist
*evlist
,
192 struct perf_event_attr
*attrs
, size_t nr_attrs
)
194 struct perf_evsel
*evsel
, *n
;
198 for (i
= 0; i
< nr_attrs
; i
++) {
199 evsel
= perf_evsel__new_idx(attrs
+ i
, evlist
->nr_entries
+ i
);
201 goto out_delete_partial_list
;
202 list_add_tail(&evsel
->node
, &head
);
205 perf_evlist__splice_list_tail(evlist
, &head
, nr_attrs
);
209 out_delete_partial_list
:
210 __evlist__for_each_safe(&head
, n
, evsel
)
211 perf_evsel__delete(evsel
);
215 int __perf_evlist__add_default_attrs(struct perf_evlist
*evlist
,
216 struct perf_event_attr
*attrs
, size_t nr_attrs
)
220 for (i
= 0; i
< nr_attrs
; i
++)
221 event_attr_init(attrs
+ i
);
223 return perf_evlist__add_attrs(evlist
, attrs
, nr_attrs
);
227 perf_evlist__find_tracepoint_by_id(struct perf_evlist
*evlist
, int id
)
229 struct perf_evsel
*evsel
;
231 evlist__for_each(evlist
, evsel
) {
232 if (evsel
->attr
.type
== PERF_TYPE_TRACEPOINT
&&
233 (int)evsel
->attr
.config
== id
)
241 perf_evlist__find_tracepoint_by_name(struct perf_evlist
*evlist
,
244 struct perf_evsel
*evsel
;
246 evlist__for_each(evlist
, evsel
) {
247 if ((evsel
->attr
.type
== PERF_TYPE_TRACEPOINT
) &&
248 (strcmp(evsel
->name
, name
) == 0))
255 int perf_evlist__add_newtp(struct perf_evlist
*evlist
,
256 const char *sys
, const char *name
, void *handler
)
258 struct perf_evsel
*evsel
= perf_evsel__newtp(sys
, name
);
263 evsel
->handler
= handler
;
264 perf_evlist__add(evlist
, evsel
);
268 void perf_evlist__disable(struct perf_evlist
*evlist
)
271 struct perf_evsel
*pos
;
272 int nr_cpus
= cpu_map__nr(evlist
->cpus
);
273 int nr_threads
= thread_map__nr(evlist
->threads
);
275 for (cpu
= 0; cpu
< nr_cpus
; cpu
++) {
276 evlist__for_each(evlist
, pos
) {
277 if (!perf_evsel__is_group_leader(pos
) || !pos
->fd
)
279 for (thread
= 0; thread
< nr_threads
; thread
++)
280 ioctl(FD(pos
, cpu
, thread
),
281 PERF_EVENT_IOC_DISABLE
, 0);
286 void perf_evlist__enable(struct perf_evlist
*evlist
)
289 struct perf_evsel
*pos
;
290 int nr_cpus
= cpu_map__nr(evlist
->cpus
);
291 int nr_threads
= thread_map__nr(evlist
->threads
);
293 for (cpu
= 0; cpu
< nr_cpus
; cpu
++) {
294 evlist__for_each(evlist
, pos
) {
295 if (!perf_evsel__is_group_leader(pos
) || !pos
->fd
)
297 for (thread
= 0; thread
< nr_threads
; thread
++)
298 ioctl(FD(pos
, cpu
, thread
),
299 PERF_EVENT_IOC_ENABLE
, 0);
304 int perf_evlist__disable_event(struct perf_evlist
*evlist
,
305 struct perf_evsel
*evsel
)
307 int cpu
, thread
, err
;
312 for (cpu
= 0; cpu
< evlist
->cpus
->nr
; cpu
++) {
313 for (thread
= 0; thread
< evlist
->threads
->nr
; thread
++) {
314 err
= ioctl(FD(evsel
, cpu
, thread
),
315 PERF_EVENT_IOC_DISABLE
, 0);
323 int perf_evlist__enable_event(struct perf_evlist
*evlist
,
324 struct perf_evsel
*evsel
)
326 int cpu
, thread
, err
;
331 for (cpu
= 0; cpu
< evlist
->cpus
->nr
; cpu
++) {
332 for (thread
= 0; thread
< evlist
->threads
->nr
; thread
++) {
333 err
= ioctl(FD(evsel
, cpu
, thread
),
334 PERF_EVENT_IOC_ENABLE
, 0);
342 static int perf_evlist__alloc_pollfd(struct perf_evlist
*evlist
)
344 int nr_cpus
= cpu_map__nr(evlist
->cpus
);
345 int nr_threads
= thread_map__nr(evlist
->threads
);
346 int nfds
= nr_cpus
* nr_threads
* evlist
->nr_entries
;
347 evlist
->pollfd
= malloc(sizeof(struct pollfd
) * nfds
);
348 return evlist
->pollfd
!= NULL
? 0 : -ENOMEM
;
351 void perf_evlist__add_pollfd(struct perf_evlist
*evlist
, int fd
)
353 fcntl(fd
, F_SETFL
, O_NONBLOCK
);
354 evlist
->pollfd
[evlist
->nr_fds
].fd
= fd
;
355 evlist
->pollfd
[evlist
->nr_fds
].events
= POLLIN
;
359 static void perf_evlist__id_hash(struct perf_evlist
*evlist
,
360 struct perf_evsel
*evsel
,
361 int cpu
, int thread
, u64 id
)
364 struct perf_sample_id
*sid
= SID(evsel
, cpu
, thread
);
368 hash
= hash_64(sid
->id
, PERF_EVLIST__HLIST_BITS
);
369 hlist_add_head(&sid
->node
, &evlist
->heads
[hash
]);
372 void perf_evlist__id_add(struct perf_evlist
*evlist
, struct perf_evsel
*evsel
,
373 int cpu
, int thread
, u64 id
)
375 perf_evlist__id_hash(evlist
, evsel
, cpu
, thread
, id
);
376 evsel
->id
[evsel
->ids
++] = id
;
379 static int perf_evlist__id_add_fd(struct perf_evlist
*evlist
,
380 struct perf_evsel
*evsel
,
381 int cpu
, int thread
, int fd
)
383 u64 read_data
[4] = { 0, };
384 int id_idx
= 1; /* The first entry is the counter value */
388 ret
= ioctl(fd
, PERF_EVENT_IOC_ID
, &id
);
395 /* Legacy way to get event id.. All hail to old kernels! */
398 * This way does not work with group format read, so bail
401 if (perf_evlist__read_format(evlist
) & PERF_FORMAT_GROUP
)
404 if (!(evsel
->attr
.read_format
& PERF_FORMAT_ID
) ||
405 read(fd
, &read_data
, sizeof(read_data
)) == -1)
408 if (evsel
->attr
.read_format
& PERF_FORMAT_TOTAL_TIME_ENABLED
)
410 if (evsel
->attr
.read_format
& PERF_FORMAT_TOTAL_TIME_RUNNING
)
413 id
= read_data
[id_idx
];
416 perf_evlist__id_add(evlist
, evsel
, cpu
, thread
, id
);
420 struct perf_sample_id
*perf_evlist__id2sid(struct perf_evlist
*evlist
, u64 id
)
422 struct hlist_head
*head
;
423 struct perf_sample_id
*sid
;
426 hash
= hash_64(id
, PERF_EVLIST__HLIST_BITS
);
427 head
= &evlist
->heads
[hash
];
429 hlist_for_each_entry(sid
, head
, node
)
436 struct perf_evsel
*perf_evlist__id2evsel(struct perf_evlist
*evlist
, u64 id
)
438 struct perf_sample_id
*sid
;
440 if (evlist
->nr_entries
== 1)
441 return perf_evlist__first(evlist
);
443 sid
= perf_evlist__id2sid(evlist
, id
);
447 if (!perf_evlist__sample_id_all(evlist
))
448 return perf_evlist__first(evlist
);
453 static int perf_evlist__event2id(struct perf_evlist
*evlist
,
454 union perf_event
*event
, u64
*id
)
456 const u64
*array
= event
->sample
.array
;
459 n
= (event
->header
.size
- sizeof(event
->header
)) >> 3;
461 if (event
->header
.type
== PERF_RECORD_SAMPLE
) {
462 if (evlist
->id_pos
>= n
)
464 *id
= array
[evlist
->id_pos
];
466 if (evlist
->is_pos
> n
)
474 static struct perf_evsel
*perf_evlist__event2evsel(struct perf_evlist
*evlist
,
475 union perf_event
*event
)
477 struct perf_evsel
*first
= perf_evlist__first(evlist
);
478 struct hlist_head
*head
;
479 struct perf_sample_id
*sid
;
483 if (evlist
->nr_entries
== 1)
486 if (!first
->attr
.sample_id_all
&&
487 event
->header
.type
!= PERF_RECORD_SAMPLE
)
490 if (perf_evlist__event2id(evlist
, event
, &id
))
493 /* Synthesized events have an id of zero */
497 hash
= hash_64(id
, PERF_EVLIST__HLIST_BITS
);
498 head
= &evlist
->heads
[hash
];
500 hlist_for_each_entry(sid
, head
, node
) {
507 union perf_event
*perf_evlist__mmap_read(struct perf_evlist
*evlist
, int idx
)
509 struct perf_mmap
*md
= &evlist
->mmap
[idx
];
510 unsigned int head
= perf_mmap__read_head(md
);
511 unsigned int old
= md
->prev
;
512 unsigned char *data
= md
->base
+ page_size
;
513 union perf_event
*event
= NULL
;
515 if (evlist
->overwrite
) {
517 * If we're further behind than half the buffer, there's a chance
518 * the writer will bite our tail and mess up the samples under us.
520 * If we somehow ended up ahead of the head, we got messed up.
522 * In either case, truncate and restart at head.
524 int diff
= head
- old
;
525 if (diff
> md
->mask
/ 2 || diff
< 0) {
526 fprintf(stderr
, "WARNING: failed to keep up with mmap data.\n");
529 * head points to a known good entry, start there.
538 event
= (union perf_event
*)&data
[old
& md
->mask
];
539 size
= event
->header
.size
;
542 * Event straddles the mmap boundary -- header should always
543 * be inside due to u64 alignment of output.
545 if ((old
& md
->mask
) + size
!= ((old
+ size
) & md
->mask
)) {
546 unsigned int offset
= old
;
547 unsigned int len
= min(sizeof(*event
), size
), cpy
;
548 void *dst
= md
->event_copy
;
551 cpy
= min(md
->mask
+ 1 - (offset
& md
->mask
), len
);
552 memcpy(dst
, &data
[offset
& md
->mask
], cpy
);
558 event
= (union perf_event
*) md
->event_copy
;
569 void perf_evlist__mmap_consume(struct perf_evlist
*evlist
, int idx
)
571 if (!evlist
->overwrite
) {
572 struct perf_mmap
*md
= &evlist
->mmap
[idx
];
573 unsigned int old
= md
->prev
;
575 perf_mmap__write_tail(md
, old
);
579 static void __perf_evlist__munmap(struct perf_evlist
*evlist
, int idx
)
581 if (evlist
->mmap
[idx
].base
!= NULL
) {
582 munmap(evlist
->mmap
[idx
].base
, evlist
->mmap_len
);
583 evlist
->mmap
[idx
].base
= NULL
;
587 void perf_evlist__munmap(struct perf_evlist
*evlist
)
591 if (evlist
->mmap
== NULL
)
594 for (i
= 0; i
< evlist
->nr_mmaps
; i
++)
595 __perf_evlist__munmap(evlist
, i
);
597 zfree(&evlist
->mmap
);
600 static int perf_evlist__alloc_mmap(struct perf_evlist
*evlist
)
602 evlist
->nr_mmaps
= cpu_map__nr(evlist
->cpus
);
603 if (cpu_map__empty(evlist
->cpus
))
604 evlist
->nr_mmaps
= thread_map__nr(evlist
->threads
);
605 evlist
->mmap
= zalloc(evlist
->nr_mmaps
* sizeof(struct perf_mmap
));
606 return evlist
->mmap
!= NULL
? 0 : -ENOMEM
;
614 static int __perf_evlist__mmap(struct perf_evlist
*evlist
, int idx
,
615 struct mmap_params
*mp
, int fd
)
617 evlist
->mmap
[idx
].prev
= 0;
618 evlist
->mmap
[idx
].mask
= mp
->mask
;
619 evlist
->mmap
[idx
].base
= mmap(NULL
, evlist
->mmap_len
, mp
->prot
,
621 if (evlist
->mmap
[idx
].base
== MAP_FAILED
) {
622 pr_debug2("failed to mmap perf event ring buffer, error %d\n",
624 evlist
->mmap
[idx
].base
= NULL
;
628 perf_evlist__add_pollfd(evlist
, fd
);
632 static int perf_evlist__mmap_per_evsel(struct perf_evlist
*evlist
, int idx
,
633 struct mmap_params
*mp
, int cpu
,
634 int thread
, int *output
)
636 struct perf_evsel
*evsel
;
638 evlist__for_each(evlist
, evsel
) {
639 int fd
= FD(evsel
, cpu
, thread
);
643 if (__perf_evlist__mmap(evlist
, idx
, mp
, *output
) < 0)
646 if (ioctl(fd
, PERF_EVENT_IOC_SET_OUTPUT
, *output
) != 0)
650 if ((evsel
->attr
.read_format
& PERF_FORMAT_ID
) &&
651 perf_evlist__id_add_fd(evlist
, evsel
, cpu
, thread
, fd
) < 0)
658 static int perf_evlist__mmap_per_cpu(struct perf_evlist
*evlist
,
659 struct mmap_params
*mp
)
662 int nr_cpus
= cpu_map__nr(evlist
->cpus
);
663 int nr_threads
= thread_map__nr(evlist
->threads
);
665 pr_debug2("perf event ring buffer mmapped per cpu\n");
666 for (cpu
= 0; cpu
< nr_cpus
; cpu
++) {
669 for (thread
= 0; thread
< nr_threads
; thread
++) {
670 if (perf_evlist__mmap_per_evsel(evlist
, cpu
, mp
, cpu
,
679 for (cpu
= 0; cpu
< nr_cpus
; cpu
++)
680 __perf_evlist__munmap(evlist
, cpu
);
684 static int perf_evlist__mmap_per_thread(struct perf_evlist
*evlist
,
685 struct mmap_params
*mp
)
688 int nr_threads
= thread_map__nr(evlist
->threads
);
690 pr_debug2("perf event ring buffer mmapped per thread\n");
691 for (thread
= 0; thread
< nr_threads
; thread
++) {
694 if (perf_evlist__mmap_per_evsel(evlist
, thread
, mp
, 0, thread
,
702 for (thread
= 0; thread
< nr_threads
; thread
++)
703 __perf_evlist__munmap(evlist
, thread
);
707 static size_t perf_evlist__mmap_size(unsigned long pages
)
709 /* 512 kiB: default amount of unprivileged mlocked memory */
710 if (pages
== UINT_MAX
)
711 pages
= (512 * 1024) / page_size
;
712 else if (!is_power_of_2(pages
))
715 return (pages
+ 1) * page_size
;
718 static long parse_pages_arg(const char *str
, unsigned long min
,
721 unsigned long pages
, val
;
722 static struct parse_tag tags
[] = {
723 { .tag
= 'B', .mult
= 1 },
724 { .tag
= 'K', .mult
= 1 << 10 },
725 { .tag
= 'M', .mult
= 1 << 20 },
726 { .tag
= 'G', .mult
= 1 << 30 },
733 val
= parse_tag_value(str
, tags
);
734 if (val
!= (unsigned long) -1) {
735 /* we got file size value */
736 pages
= PERF_ALIGN(val
, page_size
) / page_size
;
738 /* we got pages count value */
740 pages
= strtoul(str
, &eptr
, 10);
745 if (pages
== 0 && min
== 0) {
746 /* leave number of pages at 0 */
747 } else if (!is_power_of_2(pages
)) {
748 /* round pages up to next power of 2 */
749 pages
= next_pow2_l(pages
);
752 pr_info("rounding mmap pages size to %lu bytes (%lu pages)\n",
753 pages
* page_size
, pages
);
762 int perf_evlist__parse_mmap_pages(const struct option
*opt
, const char *str
,
763 int unset __maybe_unused
)
765 unsigned int *mmap_pages
= opt
->value
;
766 unsigned long max
= UINT_MAX
;
769 if (max
> SIZE_MAX
/ page_size
)
770 max
= SIZE_MAX
/ page_size
;
772 pages
= parse_pages_arg(str
, 1, max
);
774 pr_err("Invalid argument for --mmap_pages/-m\n");
783 * perf_evlist__mmap - Create mmaps to receive events.
784 * @evlist: list of events
785 * @pages: map length in pages
786 * @overwrite: overwrite older events?
788 * If @overwrite is %false the user needs to signal event consumption using
789 * perf_mmap__write_tail(). Using perf_evlist__mmap_read() does this
792 * Return: %0 on success, negative error code otherwise.
794 int perf_evlist__mmap(struct perf_evlist
*evlist
, unsigned int pages
,
797 struct perf_evsel
*evsel
;
798 const struct cpu_map
*cpus
= evlist
->cpus
;
799 const struct thread_map
*threads
= evlist
->threads
;
800 struct mmap_params mp
= {
801 .prot
= PROT_READ
| (overwrite
? 0 : PROT_WRITE
),
804 if (evlist
->mmap
== NULL
&& perf_evlist__alloc_mmap(evlist
) < 0)
807 if (evlist
->pollfd
== NULL
&& perf_evlist__alloc_pollfd(evlist
) < 0)
810 evlist
->overwrite
= overwrite
;
811 evlist
->mmap_len
= perf_evlist__mmap_size(pages
);
812 pr_debug("mmap size %zuB\n", evlist
->mmap_len
);
813 mp
.mask
= evlist
->mmap_len
- page_size
- 1;
815 evlist__for_each(evlist
, evsel
) {
816 if ((evsel
->attr
.read_format
& PERF_FORMAT_ID
) &&
817 evsel
->sample_id
== NULL
&&
818 perf_evsel__alloc_id(evsel
, cpu_map__nr(cpus
), threads
->nr
) < 0)
822 if (cpu_map__empty(cpus
))
823 return perf_evlist__mmap_per_thread(evlist
, &mp
);
825 return perf_evlist__mmap_per_cpu(evlist
, &mp
);
828 int perf_evlist__create_maps(struct perf_evlist
*evlist
, struct target
*target
)
830 evlist
->threads
= thread_map__new_str(target
->pid
, target
->tid
,
833 if (evlist
->threads
== NULL
)
836 if (target__uses_dummy_map(target
))
837 evlist
->cpus
= cpu_map__dummy_new();
839 evlist
->cpus
= cpu_map__new(target
->cpu_list
);
841 if (evlist
->cpus
== NULL
)
842 goto out_delete_threads
;
847 thread_map__delete(evlist
->threads
);
851 int perf_evlist__apply_filters(struct perf_evlist
*evlist
)
853 struct perf_evsel
*evsel
;
855 const int ncpus
= cpu_map__nr(evlist
->cpus
),
856 nthreads
= thread_map__nr(evlist
->threads
);
858 evlist__for_each(evlist
, evsel
) {
859 if (evsel
->filter
== NULL
)
862 err
= perf_evsel__set_filter(evsel
, ncpus
, nthreads
, evsel
->filter
);
870 int perf_evlist__set_filter(struct perf_evlist
*evlist
, const char *filter
)
872 struct perf_evsel
*evsel
;
874 const int ncpus
= cpu_map__nr(evlist
->cpus
),
875 nthreads
= thread_map__nr(evlist
->threads
);
877 evlist__for_each(evlist
, evsel
) {
878 err
= perf_evsel__set_filter(evsel
, ncpus
, nthreads
, filter
);
886 bool perf_evlist__valid_sample_type(struct perf_evlist
*evlist
)
888 struct perf_evsel
*pos
;
890 if (evlist
->nr_entries
== 1)
893 if (evlist
->id_pos
< 0 || evlist
->is_pos
< 0)
896 evlist__for_each(evlist
, pos
) {
897 if (pos
->id_pos
!= evlist
->id_pos
||
898 pos
->is_pos
!= evlist
->is_pos
)
905 u64
__perf_evlist__combined_sample_type(struct perf_evlist
*evlist
)
907 struct perf_evsel
*evsel
;
909 if (evlist
->combined_sample_type
)
910 return evlist
->combined_sample_type
;
912 evlist__for_each(evlist
, evsel
)
913 evlist
->combined_sample_type
|= evsel
->attr
.sample_type
;
915 return evlist
->combined_sample_type
;
918 u64
perf_evlist__combined_sample_type(struct perf_evlist
*evlist
)
920 evlist
->combined_sample_type
= 0;
921 return __perf_evlist__combined_sample_type(evlist
);
924 bool perf_evlist__valid_read_format(struct perf_evlist
*evlist
)
926 struct perf_evsel
*first
= perf_evlist__first(evlist
), *pos
= first
;
927 u64 read_format
= first
->attr
.read_format
;
928 u64 sample_type
= first
->attr
.sample_type
;
930 evlist__for_each(evlist
, pos
) {
931 if (read_format
!= pos
->attr
.read_format
)
935 /* PERF_SAMPLE_READ imples PERF_FORMAT_ID. */
936 if ((sample_type
& PERF_SAMPLE_READ
) &&
937 !(read_format
& PERF_FORMAT_ID
)) {
944 u64
perf_evlist__read_format(struct perf_evlist
*evlist
)
946 struct perf_evsel
*first
= perf_evlist__first(evlist
);
947 return first
->attr
.read_format
;
950 u16
perf_evlist__id_hdr_size(struct perf_evlist
*evlist
)
952 struct perf_evsel
*first
= perf_evlist__first(evlist
);
953 struct perf_sample
*data
;
957 if (!first
->attr
.sample_id_all
)
960 sample_type
= first
->attr
.sample_type
;
962 if (sample_type
& PERF_SAMPLE_TID
)
963 size
+= sizeof(data
->tid
) * 2;
965 if (sample_type
& PERF_SAMPLE_TIME
)
966 size
+= sizeof(data
->time
);
968 if (sample_type
& PERF_SAMPLE_ID
)
969 size
+= sizeof(data
->id
);
971 if (sample_type
& PERF_SAMPLE_STREAM_ID
)
972 size
+= sizeof(data
->stream_id
);
974 if (sample_type
& PERF_SAMPLE_CPU
)
975 size
+= sizeof(data
->cpu
) * 2;
977 if (sample_type
& PERF_SAMPLE_IDENTIFIER
)
978 size
+= sizeof(data
->id
);
983 bool perf_evlist__valid_sample_id_all(struct perf_evlist
*evlist
)
985 struct perf_evsel
*first
= perf_evlist__first(evlist
), *pos
= first
;
987 evlist__for_each_continue(evlist
, pos
) {
988 if (first
->attr
.sample_id_all
!= pos
->attr
.sample_id_all
)
995 bool perf_evlist__sample_id_all(struct perf_evlist
*evlist
)
997 struct perf_evsel
*first
= perf_evlist__first(evlist
);
998 return first
->attr
.sample_id_all
;
1001 void perf_evlist__set_selected(struct perf_evlist
*evlist
,
1002 struct perf_evsel
*evsel
)
1004 evlist
->selected
= evsel
;
1007 void perf_evlist__close(struct perf_evlist
*evlist
)
1009 struct perf_evsel
*evsel
;
1010 int ncpus
= cpu_map__nr(evlist
->cpus
);
1011 int nthreads
= thread_map__nr(evlist
->threads
);
1014 evlist__for_each_reverse(evlist
, evsel
) {
1015 n
= evsel
->cpus
? evsel
->cpus
->nr
: ncpus
;
1016 perf_evsel__close(evsel
, n
, nthreads
);
1020 int perf_evlist__open(struct perf_evlist
*evlist
)
1022 struct perf_evsel
*evsel
;
1025 perf_evlist__update_id_pos(evlist
);
1027 evlist__for_each(evlist
, evsel
) {
1028 err
= perf_evsel__open(evsel
, evlist
->cpus
, evlist
->threads
);
1035 perf_evlist__close(evlist
);
1040 int perf_evlist__prepare_workload(struct perf_evlist
*evlist
, struct target
*target
,
1041 const char *argv
[], bool pipe_output
,
1042 void (*exec_error
)(int signo
, siginfo_t
*info
, void *ucontext
))
1044 int child_ready_pipe
[2], go_pipe
[2];
1047 if (pipe(child_ready_pipe
) < 0) {
1048 perror("failed to create 'ready' pipe");
1052 if (pipe(go_pipe
) < 0) {
1053 perror("failed to create 'go' pipe");
1054 goto out_close_ready_pipe
;
1057 evlist
->workload
.pid
= fork();
1058 if (evlist
->workload
.pid
< 0) {
1059 perror("failed to fork");
1060 goto out_close_pipes
;
1063 if (!evlist
->workload
.pid
) {
1067 signal(SIGTERM
, SIG_DFL
);
1069 close(child_ready_pipe
[0]);
1071 fcntl(go_pipe
[0], F_SETFD
, FD_CLOEXEC
);
1074 * Tell the parent we're ready to go
1076 close(child_ready_pipe
[1]);
1079 * Wait until the parent tells us to go.
1081 if (read(go_pipe
[0], &bf
, 1) == -1)
1082 perror("unable to read pipe");
1084 execvp(argv
[0], (char **)argv
);
1089 val
.sival_int
= errno
;
1090 if (sigqueue(getppid(), SIGUSR1
, val
))
1098 struct sigaction act
= {
1099 .sa_flags
= SA_SIGINFO
,
1100 .sa_sigaction
= exec_error
,
1102 sigaction(SIGUSR1
, &act
, NULL
);
1105 if (target__none(target
))
1106 evlist
->threads
->map
[0] = evlist
->workload
.pid
;
1108 close(child_ready_pipe
[1]);
1111 * wait for child to settle
1113 if (read(child_ready_pipe
[0], &bf
, 1) == -1) {
1114 perror("unable to read pipe");
1115 goto out_close_pipes
;
1118 fcntl(go_pipe
[1], F_SETFD
, FD_CLOEXEC
);
1119 evlist
->workload
.cork_fd
= go_pipe
[1];
1120 close(child_ready_pipe
[0]);
1126 out_close_ready_pipe
:
1127 close(child_ready_pipe
[0]);
1128 close(child_ready_pipe
[1]);
1132 int perf_evlist__start_workload(struct perf_evlist
*evlist
)
1134 if (evlist
->workload
.cork_fd
> 0) {
1138 * Remove the cork, let it rip!
1140 ret
= write(evlist
->workload
.cork_fd
, &bf
, 1);
1142 perror("enable to write to pipe");
1144 close(evlist
->workload
.cork_fd
);
1151 int perf_evlist__parse_sample(struct perf_evlist
*evlist
, union perf_event
*event
,
1152 struct perf_sample
*sample
)
1154 struct perf_evsel
*evsel
= perf_evlist__event2evsel(evlist
, event
);
1158 return perf_evsel__parse_sample(evsel
, event
, sample
);
1161 size_t perf_evlist__fprintf(struct perf_evlist
*evlist
, FILE *fp
)
1163 struct perf_evsel
*evsel
;
1166 evlist__for_each(evlist
, evsel
) {
1167 printed
+= fprintf(fp
, "%s%s", evsel
->idx
? ", " : "",
1168 perf_evsel__name(evsel
));
1171 return printed
+ fprintf(fp
, "\n");
1174 int perf_evlist__strerror_tp(struct perf_evlist
*evlist __maybe_unused
,
1175 int err
, char *buf
, size_t size
)
1181 scnprintf(buf
, size
, "%s",
1182 "Error:\tUnable to find debugfs\n"
1183 "Hint:\tWas your kernel was compiled with debugfs support?\n"
1184 "Hint:\tIs the debugfs filesystem mounted?\n"
1185 "Hint:\tTry 'sudo mount -t debugfs nodev /sys/kernel/debug'");
1188 scnprintf(buf
, size
,
1189 "Error:\tNo permissions to read %s/tracing/events/raw_syscalls\n"
1190 "Hint:\tTry 'sudo mount -o remount,mode=755 %s'\n",
1191 debugfs_mountpoint
, debugfs_mountpoint
);
1194 scnprintf(buf
, size
, "%s", strerror_r(err
, sbuf
, sizeof(sbuf
)));
1201 int perf_evlist__strerror_open(struct perf_evlist
*evlist __maybe_unused
,
1202 int err
, char *buf
, size_t size
)
1205 char sbuf
[128], *emsg
= strerror_r(err
, sbuf
, sizeof(sbuf
));
1210 printed
= scnprintf(buf
, size
,
1212 "Hint:\tCheck /proc/sys/kernel/perf_event_paranoid setting.", emsg
);
1214 value
= perf_event_paranoid();
1216 printed
+= scnprintf(buf
+ printed
, size
- printed
, "\nHint:\t");
1219 printed
+= scnprintf(buf
+ printed
, size
- printed
,
1220 "For your workloads it needs to be <= 1\nHint:\t");
1222 printed
+= scnprintf(buf
+ printed
, size
- printed
,
1223 "For system wide tracing it needs to be set to -1.\n");
1225 printed
+= scnprintf(buf
+ printed
, size
- printed
,
1226 "Hint:\tTry: 'sudo sh -c \"echo -1 > /proc/sys/kernel/perf_event_paranoid\"'\n"
1227 "Hint:\tThe current value is %d.", value
);
1230 scnprintf(buf
, size
, "%s", emsg
);
1237 void perf_evlist__to_front(struct perf_evlist
*evlist
,
1238 struct perf_evsel
*move_evsel
)
1240 struct perf_evsel
*evsel
, *n
;
1243 if (move_evsel
== perf_evlist__first(evlist
))
1246 evlist__for_each_safe(evlist
, n
, evsel
) {
1247 if (evsel
->leader
== move_evsel
->leader
)
1248 list_move_tail(&evsel
->node
, &move
);
1251 list_splice(&move
, &evlist
->entries
);