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 <lk/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 list_for_each_entry(evsel
, &evlist
->entries
, node
)
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 list_for_each_entry_safe(pos
, n
, &evlist
->entries
, node
) {
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
)
105 free(evlist
->pollfd
);
107 evlist
->pollfd
= NULL
;
110 void perf_evlist__delete(struct perf_evlist
*evlist
)
112 perf_evlist__purge(evlist
);
113 perf_evlist__exit(evlist
);
117 void perf_evlist__add(struct perf_evlist
*evlist
, struct perf_evsel
*entry
)
119 list_add_tail(&entry
->node
, &evlist
->entries
);
120 if (!evlist
->nr_entries
++)
121 perf_evlist__set_id_pos(evlist
);
124 void perf_evlist__splice_list_tail(struct perf_evlist
*evlist
,
125 struct list_head
*list
,
128 bool set_id_pos
= !evlist
->nr_entries
;
130 list_splice_tail(list
, &evlist
->entries
);
131 evlist
->nr_entries
+= nr_entries
;
133 perf_evlist__set_id_pos(evlist
);
136 void __perf_evlist__set_leader(struct list_head
*list
)
138 struct perf_evsel
*evsel
, *leader
;
140 leader
= list_entry(list
->next
, struct perf_evsel
, node
);
141 evsel
= list_entry(list
->prev
, struct perf_evsel
, node
);
143 leader
->nr_members
= evsel
->idx
- leader
->idx
+ 1;
145 list_for_each_entry(evsel
, list
, node
) {
146 evsel
->leader
= leader
;
150 void perf_evlist__set_leader(struct perf_evlist
*evlist
)
152 if (evlist
->nr_entries
) {
153 evlist
->nr_groups
= evlist
->nr_entries
> 1 ? 1 : 0;
154 __perf_evlist__set_leader(&evlist
->entries
);
158 int perf_evlist__add_default(struct perf_evlist
*evlist
)
160 struct perf_event_attr attr
= {
161 .type
= PERF_TYPE_HARDWARE
,
162 .config
= PERF_COUNT_HW_CPU_CYCLES
,
164 struct perf_evsel
*evsel
;
166 event_attr_init(&attr
);
168 evsel
= perf_evsel__new(&attr
, 0);
172 /* use strdup() because free(evsel) assumes name is allocated */
173 evsel
->name
= strdup("cycles");
177 perf_evlist__add(evlist
, evsel
);
180 perf_evsel__delete(evsel
);
185 static int perf_evlist__add_attrs(struct perf_evlist
*evlist
,
186 struct perf_event_attr
*attrs
, size_t nr_attrs
)
188 struct perf_evsel
*evsel
, *n
;
192 for (i
= 0; i
< nr_attrs
; i
++) {
193 evsel
= perf_evsel__new(attrs
+ i
, evlist
->nr_entries
+ i
);
195 goto out_delete_partial_list
;
196 list_add_tail(&evsel
->node
, &head
);
199 perf_evlist__splice_list_tail(evlist
, &head
, nr_attrs
);
203 out_delete_partial_list
:
204 list_for_each_entry_safe(evsel
, n
, &head
, node
)
205 perf_evsel__delete(evsel
);
209 int __perf_evlist__add_default_attrs(struct perf_evlist
*evlist
,
210 struct perf_event_attr
*attrs
, size_t nr_attrs
)
214 for (i
= 0; i
< nr_attrs
; i
++)
215 event_attr_init(attrs
+ i
);
217 return perf_evlist__add_attrs(evlist
, attrs
, nr_attrs
);
221 perf_evlist__find_tracepoint_by_id(struct perf_evlist
*evlist
, int id
)
223 struct perf_evsel
*evsel
;
225 list_for_each_entry(evsel
, &evlist
->entries
, node
) {
226 if (evsel
->attr
.type
== PERF_TYPE_TRACEPOINT
&&
227 (int)evsel
->attr
.config
== id
)
235 perf_evlist__find_tracepoint_by_name(struct perf_evlist
*evlist
,
238 struct perf_evsel
*evsel
;
240 list_for_each_entry(evsel
, &evlist
->entries
, node
) {
241 if ((evsel
->attr
.type
== PERF_TYPE_TRACEPOINT
) &&
242 (strcmp(evsel
->name
, name
) == 0))
249 int perf_evlist__add_newtp(struct perf_evlist
*evlist
,
250 const char *sys
, const char *name
, void *handler
)
252 struct perf_evsel
*evsel
;
254 evsel
= perf_evsel__newtp(sys
, name
, evlist
->nr_entries
);
258 evsel
->handler
= handler
;
259 perf_evlist__add(evlist
, evsel
);
263 void perf_evlist__disable(struct perf_evlist
*evlist
)
266 struct perf_evsel
*pos
;
267 int nr_cpus
= cpu_map__nr(evlist
->cpus
);
268 int nr_threads
= thread_map__nr(evlist
->threads
);
270 for (cpu
= 0; cpu
< nr_cpus
; cpu
++) {
271 list_for_each_entry(pos
, &evlist
->entries
, node
) {
272 if (!perf_evsel__is_group_leader(pos
) || !pos
->fd
)
274 for (thread
= 0; thread
< nr_threads
; thread
++)
275 ioctl(FD(pos
, cpu
, thread
),
276 PERF_EVENT_IOC_DISABLE
, 0);
281 void perf_evlist__enable(struct perf_evlist
*evlist
)
284 struct perf_evsel
*pos
;
285 int nr_cpus
= cpu_map__nr(evlist
->cpus
);
286 int nr_threads
= thread_map__nr(evlist
->threads
);
288 for (cpu
= 0; cpu
< nr_cpus
; cpu
++) {
289 list_for_each_entry(pos
, &evlist
->entries
, node
) {
290 if (!perf_evsel__is_group_leader(pos
) || !pos
->fd
)
292 for (thread
= 0; thread
< nr_threads
; thread
++)
293 ioctl(FD(pos
, cpu
, thread
),
294 PERF_EVENT_IOC_ENABLE
, 0);
299 int perf_evlist__disable_event(struct perf_evlist
*evlist
,
300 struct perf_evsel
*evsel
)
302 int cpu
, thread
, err
;
307 for (cpu
= 0; cpu
< evlist
->cpus
->nr
; cpu
++) {
308 for (thread
= 0; thread
< evlist
->threads
->nr
; thread
++) {
309 err
= ioctl(FD(evsel
, cpu
, thread
),
310 PERF_EVENT_IOC_DISABLE
, 0);
318 int perf_evlist__enable_event(struct perf_evlist
*evlist
,
319 struct perf_evsel
*evsel
)
321 int cpu
, thread
, err
;
326 for (cpu
= 0; cpu
< evlist
->cpus
->nr
; cpu
++) {
327 for (thread
= 0; thread
< evlist
->threads
->nr
; thread
++) {
328 err
= ioctl(FD(evsel
, cpu
, thread
),
329 PERF_EVENT_IOC_ENABLE
, 0);
337 static int perf_evlist__alloc_pollfd(struct perf_evlist
*evlist
)
339 int nr_cpus
= cpu_map__nr(evlist
->cpus
);
340 int nr_threads
= thread_map__nr(evlist
->threads
);
341 int nfds
= nr_cpus
* nr_threads
* evlist
->nr_entries
;
342 evlist
->pollfd
= malloc(sizeof(struct pollfd
) * nfds
);
343 return evlist
->pollfd
!= NULL
? 0 : -ENOMEM
;
346 void perf_evlist__add_pollfd(struct perf_evlist
*evlist
, int fd
)
348 fcntl(fd
, F_SETFL
, O_NONBLOCK
);
349 evlist
->pollfd
[evlist
->nr_fds
].fd
= fd
;
350 evlist
->pollfd
[evlist
->nr_fds
].events
= POLLIN
;
354 static void perf_evlist__id_hash(struct perf_evlist
*evlist
,
355 struct perf_evsel
*evsel
,
356 int cpu
, int thread
, u64 id
)
359 struct perf_sample_id
*sid
= SID(evsel
, cpu
, thread
);
363 hash
= hash_64(sid
->id
, PERF_EVLIST__HLIST_BITS
);
364 hlist_add_head(&sid
->node
, &evlist
->heads
[hash
]);
367 void perf_evlist__id_add(struct perf_evlist
*evlist
, struct perf_evsel
*evsel
,
368 int cpu
, int thread
, u64 id
)
370 perf_evlist__id_hash(evlist
, evsel
, cpu
, thread
, id
);
371 evsel
->id
[evsel
->ids
++] = id
;
374 static int perf_evlist__id_add_fd(struct perf_evlist
*evlist
,
375 struct perf_evsel
*evsel
,
376 int cpu
, int thread
, int fd
)
378 u64 read_data
[4] = { 0, };
379 int id_idx
= 1; /* The first entry is the counter value */
383 ret
= ioctl(fd
, PERF_EVENT_IOC_ID
, &id
);
390 /* Legacy way to get event id.. All hail to old kernels! */
393 * This way does not work with group format read, so bail
396 if (perf_evlist__read_format(evlist
) & PERF_FORMAT_GROUP
)
399 if (!(evsel
->attr
.read_format
& PERF_FORMAT_ID
) ||
400 read(fd
, &read_data
, sizeof(read_data
)) == -1)
403 if (evsel
->attr
.read_format
& PERF_FORMAT_TOTAL_TIME_ENABLED
)
405 if (evsel
->attr
.read_format
& PERF_FORMAT_TOTAL_TIME_RUNNING
)
408 id
= read_data
[id_idx
];
411 perf_evlist__id_add(evlist
, evsel
, cpu
, thread
, id
);
415 struct perf_sample_id
*perf_evlist__id2sid(struct perf_evlist
*evlist
, u64 id
)
417 struct hlist_head
*head
;
418 struct perf_sample_id
*sid
;
421 hash
= hash_64(id
, PERF_EVLIST__HLIST_BITS
);
422 head
= &evlist
->heads
[hash
];
424 hlist_for_each_entry(sid
, head
, node
)
431 struct perf_evsel
*perf_evlist__id2evsel(struct perf_evlist
*evlist
, u64 id
)
433 struct perf_sample_id
*sid
;
435 if (evlist
->nr_entries
== 1)
436 return perf_evlist__first(evlist
);
438 sid
= perf_evlist__id2sid(evlist
, id
);
442 if (!perf_evlist__sample_id_all(evlist
))
443 return perf_evlist__first(evlist
);
448 static int perf_evlist__event2id(struct perf_evlist
*evlist
,
449 union perf_event
*event
, u64
*id
)
451 const u64
*array
= event
->sample
.array
;
454 n
= (event
->header
.size
- sizeof(event
->header
)) >> 3;
456 if (event
->header
.type
== PERF_RECORD_SAMPLE
) {
457 if (evlist
->id_pos
>= n
)
459 *id
= array
[evlist
->id_pos
];
461 if (evlist
->is_pos
> n
)
469 static struct perf_evsel
*perf_evlist__event2evsel(struct perf_evlist
*evlist
,
470 union perf_event
*event
)
472 struct perf_evsel
*first
= perf_evlist__first(evlist
);
473 struct hlist_head
*head
;
474 struct perf_sample_id
*sid
;
478 if (evlist
->nr_entries
== 1)
481 if (!first
->attr
.sample_id_all
&&
482 event
->header
.type
!= PERF_RECORD_SAMPLE
)
485 if (perf_evlist__event2id(evlist
, event
, &id
))
488 /* Synthesized events have an id of zero */
492 hash
= hash_64(id
, PERF_EVLIST__HLIST_BITS
);
493 head
= &evlist
->heads
[hash
];
495 hlist_for_each_entry(sid
, head
, node
) {
502 union perf_event
*perf_evlist__mmap_read(struct perf_evlist
*evlist
, int idx
)
504 struct perf_mmap
*md
= &evlist
->mmap
[idx
];
505 unsigned int head
= perf_mmap__read_head(md
);
506 unsigned int old
= md
->prev
;
507 unsigned char *data
= md
->base
+ page_size
;
508 union perf_event
*event
= NULL
;
510 if (evlist
->overwrite
) {
512 * If we're further behind than half the buffer, there's a chance
513 * the writer will bite our tail and mess up the samples under us.
515 * If we somehow ended up ahead of the head, we got messed up.
517 * In either case, truncate and restart at head.
519 int diff
= head
- old
;
520 if (diff
> md
->mask
/ 2 || diff
< 0) {
521 fprintf(stderr
, "WARNING: failed to keep up with mmap data.\n");
524 * head points to a known good entry, start there.
533 event
= (union perf_event
*)&data
[old
& md
->mask
];
534 size
= event
->header
.size
;
537 * Event straddles the mmap boundary -- header should always
538 * be inside due to u64 alignment of output.
540 if ((old
& md
->mask
) + size
!= ((old
+ size
) & md
->mask
)) {
541 unsigned int offset
= old
;
542 unsigned int len
= min(sizeof(*event
), size
), cpy
;
543 void *dst
= md
->event_copy
;
546 cpy
= min(md
->mask
+ 1 - (offset
& md
->mask
), len
);
547 memcpy(dst
, &data
[offset
& md
->mask
], cpy
);
553 event
= (union perf_event
*) md
->event_copy
;
564 void perf_evlist__mmap_consume(struct perf_evlist
*evlist
, int idx
)
566 if (!evlist
->overwrite
) {
567 struct perf_mmap
*md
= &evlist
->mmap
[idx
];
568 unsigned int old
= md
->prev
;
570 perf_mmap__write_tail(md
, old
);
574 static void __perf_evlist__munmap(struct perf_evlist
*evlist
, int idx
)
576 if (evlist
->mmap
[idx
].base
!= NULL
) {
577 munmap(evlist
->mmap
[idx
].base
, evlist
->mmap_len
);
578 evlist
->mmap
[idx
].base
= NULL
;
582 void perf_evlist__munmap(struct perf_evlist
*evlist
)
586 for (i
= 0; i
< evlist
->nr_mmaps
; i
++)
587 __perf_evlist__munmap(evlist
, i
);
593 static int perf_evlist__alloc_mmap(struct perf_evlist
*evlist
)
595 evlist
->nr_mmaps
= cpu_map__nr(evlist
->cpus
);
596 if (cpu_map__empty(evlist
->cpus
))
597 evlist
->nr_mmaps
= thread_map__nr(evlist
->threads
);
598 evlist
->mmap
= zalloc(evlist
->nr_mmaps
* sizeof(struct perf_mmap
));
599 return evlist
->mmap
!= NULL
? 0 : -ENOMEM
;
602 static int __perf_evlist__mmap(struct perf_evlist
*evlist
,
603 int idx
, int prot
, int mask
, int fd
)
605 evlist
->mmap
[idx
].prev
= 0;
606 evlist
->mmap
[idx
].mask
= mask
;
607 evlist
->mmap
[idx
].base
= mmap(NULL
, evlist
->mmap_len
, prot
,
609 if (evlist
->mmap
[idx
].base
== MAP_FAILED
) {
610 pr_debug2("failed to mmap perf event ring buffer, error %d\n",
612 evlist
->mmap
[idx
].base
= NULL
;
616 perf_evlist__add_pollfd(evlist
, fd
);
620 static int perf_evlist__mmap_per_evsel(struct perf_evlist
*evlist
, int idx
,
621 int prot
, int mask
, int cpu
, int thread
,
624 struct perf_evsel
*evsel
;
626 list_for_each_entry(evsel
, &evlist
->entries
, node
) {
627 int fd
= FD(evsel
, cpu
, thread
);
631 if (__perf_evlist__mmap(evlist
, idx
, prot
, mask
,
635 if (ioctl(fd
, PERF_EVENT_IOC_SET_OUTPUT
, *output
) != 0)
639 if ((evsel
->attr
.read_format
& PERF_FORMAT_ID
) &&
640 perf_evlist__id_add_fd(evlist
, evsel
, cpu
, thread
, fd
) < 0)
647 static int perf_evlist__mmap_per_cpu(struct perf_evlist
*evlist
, int prot
,
651 int nr_cpus
= cpu_map__nr(evlist
->cpus
);
652 int nr_threads
= thread_map__nr(evlist
->threads
);
654 pr_debug2("perf event ring buffer mmapped per cpu\n");
655 for (cpu
= 0; cpu
< nr_cpus
; cpu
++) {
658 for (thread
= 0; thread
< nr_threads
; thread
++) {
659 if (perf_evlist__mmap_per_evsel(evlist
, cpu
, prot
, mask
,
660 cpu
, thread
, &output
))
668 for (cpu
= 0; cpu
< nr_cpus
; cpu
++)
669 __perf_evlist__munmap(evlist
, cpu
);
673 static int perf_evlist__mmap_per_thread(struct perf_evlist
*evlist
, int prot
,
677 int nr_threads
= thread_map__nr(evlist
->threads
);
679 pr_debug2("perf event ring buffer mmapped per thread\n");
680 for (thread
= 0; thread
< nr_threads
; thread
++) {
683 if (perf_evlist__mmap_per_evsel(evlist
, thread
, prot
, mask
, 0,
691 for (thread
= 0; thread
< nr_threads
; thread
++)
692 __perf_evlist__munmap(evlist
, thread
);
696 static size_t perf_evlist__mmap_size(unsigned long pages
)
698 /* 512 kiB: default amount of unprivileged mlocked memory */
699 if (pages
== UINT_MAX
)
700 pages
= (512 * 1024) / page_size
;
701 else if (!is_power_of_2(pages
))
704 return (pages
+ 1) * page_size
;
707 int perf_evlist__parse_mmap_pages(const struct option
*opt
, const char *str
,
708 int unset __maybe_unused
)
710 unsigned int *mmap_pages
= opt
->value
;
711 unsigned long pages
, val
;
713 static struct parse_tag tags
[] = {
714 { .tag
= 'B', .mult
= 1 },
715 { .tag
= 'K', .mult
= 1 << 10 },
716 { .tag
= 'M', .mult
= 1 << 20 },
717 { .tag
= 'G', .mult
= 1 << 30 },
721 val
= parse_tag_value(str
, tags
);
722 if (val
!= (unsigned long) -1) {
723 /* we got file size value */
724 pages
= PERF_ALIGN(val
, page_size
) / page_size
;
725 if (pages
< (1UL << 31) && !is_power_of_2(pages
)) {
726 pages
= next_pow2(pages
);
727 pr_info("rounding mmap pages size to %lu (%lu pages)\n",
728 pages
* page_size
, pages
);
731 /* we got pages count value */
733 pages
= strtoul(str
, &eptr
, 10);
735 pr_err("failed to parse --mmap_pages/-m value\n");
740 if (pages
> UINT_MAX
|| pages
> SIZE_MAX
/ page_size
) {
741 pr_err("--mmap_pages/-m value too big\n");
745 size
= perf_evlist__mmap_size(pages
);
747 pr_err("--mmap_pages/-m value must be a power of two.");
756 * perf_evlist__mmap - Create mmaps to receive events.
757 * @evlist: list of events
758 * @pages: map length in pages
759 * @overwrite: overwrite older events?
761 * If @overwrite is %false the user needs to signal event consumption using
762 * perf_mmap__write_tail(). Using perf_evlist__mmap_read() does this
765 * Return: %0 on success, negative error code otherwise.
767 int perf_evlist__mmap(struct perf_evlist
*evlist
, unsigned int pages
,
770 struct perf_evsel
*evsel
;
771 const struct cpu_map
*cpus
= evlist
->cpus
;
772 const struct thread_map
*threads
= evlist
->threads
;
773 int prot
= PROT_READ
| (overwrite
? 0 : PROT_WRITE
), mask
;
775 if (evlist
->mmap
== NULL
&& perf_evlist__alloc_mmap(evlist
) < 0)
778 if (evlist
->pollfd
== NULL
&& perf_evlist__alloc_pollfd(evlist
) < 0)
781 evlist
->overwrite
= overwrite
;
782 evlist
->mmap_len
= perf_evlist__mmap_size(pages
);
783 pr_debug("mmap size %zuB\n", evlist
->mmap_len
);
784 mask
= evlist
->mmap_len
- page_size
- 1;
786 list_for_each_entry(evsel
, &evlist
->entries
, node
) {
787 if ((evsel
->attr
.read_format
& PERF_FORMAT_ID
) &&
788 evsel
->sample_id
== NULL
&&
789 perf_evsel__alloc_id(evsel
, cpu_map__nr(cpus
), threads
->nr
) < 0)
793 if (cpu_map__empty(cpus
))
794 return perf_evlist__mmap_per_thread(evlist
, prot
, mask
);
796 return perf_evlist__mmap_per_cpu(evlist
, prot
, mask
);
799 int perf_evlist__create_maps(struct perf_evlist
*evlist
,
800 struct perf_target
*target
)
802 evlist
->threads
= thread_map__new_str(target
->pid
, target
->tid
,
805 if (evlist
->threads
== NULL
)
808 if (perf_target__has_task(target
))
809 evlist
->cpus
= cpu_map__dummy_new();
810 else if (!perf_target__has_cpu(target
) && !target
->uses_mmap
)
811 evlist
->cpus
= cpu_map__dummy_new();
813 evlist
->cpus
= cpu_map__new(target
->cpu_list
);
815 if (evlist
->cpus
== NULL
)
816 goto out_delete_threads
;
821 thread_map__delete(evlist
->threads
);
825 void perf_evlist__delete_maps(struct perf_evlist
*evlist
)
827 cpu_map__delete(evlist
->cpus
);
828 thread_map__delete(evlist
->threads
);
830 evlist
->threads
= NULL
;
833 int perf_evlist__apply_filters(struct perf_evlist
*evlist
)
835 struct perf_evsel
*evsel
;
837 const int ncpus
= cpu_map__nr(evlist
->cpus
),
838 nthreads
= thread_map__nr(evlist
->threads
);
840 list_for_each_entry(evsel
, &evlist
->entries
, node
) {
841 if (evsel
->filter
== NULL
)
844 err
= perf_evsel__set_filter(evsel
, ncpus
, nthreads
, evsel
->filter
);
852 int perf_evlist__set_filter(struct perf_evlist
*evlist
, const char *filter
)
854 struct perf_evsel
*evsel
;
856 const int ncpus
= cpu_map__nr(evlist
->cpus
),
857 nthreads
= thread_map__nr(evlist
->threads
);
859 list_for_each_entry(evsel
, &evlist
->entries
, node
) {
860 err
= perf_evsel__set_filter(evsel
, ncpus
, nthreads
, filter
);
868 bool perf_evlist__valid_sample_type(struct perf_evlist
*evlist
)
870 struct perf_evsel
*pos
;
872 if (evlist
->nr_entries
== 1)
875 if (evlist
->id_pos
< 0 || evlist
->is_pos
< 0)
878 list_for_each_entry(pos
, &evlist
->entries
, node
) {
879 if (pos
->id_pos
!= evlist
->id_pos
||
880 pos
->is_pos
!= evlist
->is_pos
)
887 u64
__perf_evlist__combined_sample_type(struct perf_evlist
*evlist
)
889 struct perf_evsel
*evsel
;
891 if (evlist
->combined_sample_type
)
892 return evlist
->combined_sample_type
;
894 list_for_each_entry(evsel
, &evlist
->entries
, node
)
895 evlist
->combined_sample_type
|= evsel
->attr
.sample_type
;
897 return evlist
->combined_sample_type
;
900 u64
perf_evlist__combined_sample_type(struct perf_evlist
*evlist
)
902 evlist
->combined_sample_type
= 0;
903 return __perf_evlist__combined_sample_type(evlist
);
906 bool perf_evlist__valid_read_format(struct perf_evlist
*evlist
)
908 struct perf_evsel
*first
= perf_evlist__first(evlist
), *pos
= first
;
909 u64 read_format
= first
->attr
.read_format
;
910 u64 sample_type
= first
->attr
.sample_type
;
912 list_for_each_entry_continue(pos
, &evlist
->entries
, node
) {
913 if (read_format
!= pos
->attr
.read_format
)
917 /* PERF_SAMPLE_READ imples PERF_FORMAT_ID. */
918 if ((sample_type
& PERF_SAMPLE_READ
) &&
919 !(read_format
& PERF_FORMAT_ID
)) {
926 u64
perf_evlist__read_format(struct perf_evlist
*evlist
)
928 struct perf_evsel
*first
= perf_evlist__first(evlist
);
929 return first
->attr
.read_format
;
932 u16
perf_evlist__id_hdr_size(struct perf_evlist
*evlist
)
934 struct perf_evsel
*first
= perf_evlist__first(evlist
);
935 struct perf_sample
*data
;
939 if (!first
->attr
.sample_id_all
)
942 sample_type
= first
->attr
.sample_type
;
944 if (sample_type
& PERF_SAMPLE_TID
)
945 size
+= sizeof(data
->tid
) * 2;
947 if (sample_type
& PERF_SAMPLE_TIME
)
948 size
+= sizeof(data
->time
);
950 if (sample_type
& PERF_SAMPLE_ID
)
951 size
+= sizeof(data
->id
);
953 if (sample_type
& PERF_SAMPLE_STREAM_ID
)
954 size
+= sizeof(data
->stream_id
);
956 if (sample_type
& PERF_SAMPLE_CPU
)
957 size
+= sizeof(data
->cpu
) * 2;
959 if (sample_type
& PERF_SAMPLE_IDENTIFIER
)
960 size
+= sizeof(data
->id
);
965 bool perf_evlist__valid_sample_id_all(struct perf_evlist
*evlist
)
967 struct perf_evsel
*first
= perf_evlist__first(evlist
), *pos
= first
;
969 list_for_each_entry_continue(pos
, &evlist
->entries
, node
) {
970 if (first
->attr
.sample_id_all
!= pos
->attr
.sample_id_all
)
977 bool perf_evlist__sample_id_all(struct perf_evlist
*evlist
)
979 struct perf_evsel
*first
= perf_evlist__first(evlist
);
980 return first
->attr
.sample_id_all
;
983 void perf_evlist__set_selected(struct perf_evlist
*evlist
,
984 struct perf_evsel
*evsel
)
986 evlist
->selected
= evsel
;
989 void perf_evlist__close(struct perf_evlist
*evlist
)
991 struct perf_evsel
*evsel
;
992 int ncpus
= cpu_map__nr(evlist
->cpus
);
993 int nthreads
= thread_map__nr(evlist
->threads
);
995 list_for_each_entry_reverse(evsel
, &evlist
->entries
, node
)
996 perf_evsel__close(evsel
, ncpus
, nthreads
);
999 int perf_evlist__open(struct perf_evlist
*evlist
)
1001 struct perf_evsel
*evsel
;
1004 perf_evlist__update_id_pos(evlist
);
1006 list_for_each_entry(evsel
, &evlist
->entries
, node
) {
1007 err
= perf_evsel__open(evsel
, evlist
->cpus
, evlist
->threads
);
1014 perf_evlist__close(evlist
);
1019 int perf_evlist__prepare_workload(struct perf_evlist
*evlist
,
1020 struct perf_target
*target
,
1021 const char *argv
[], bool pipe_output
,
1024 int child_ready_pipe
[2], go_pipe
[2];
1027 if (pipe(child_ready_pipe
) < 0) {
1028 perror("failed to create 'ready' pipe");
1032 if (pipe(go_pipe
) < 0) {
1033 perror("failed to create 'go' pipe");
1034 goto out_close_ready_pipe
;
1037 evlist
->workload
.pid
= fork();
1038 if (evlist
->workload
.pid
< 0) {
1039 perror("failed to fork");
1040 goto out_close_pipes
;
1043 if (!evlist
->workload
.pid
) {
1047 signal(SIGTERM
, SIG_DFL
);
1049 close(child_ready_pipe
[0]);
1051 fcntl(go_pipe
[0], F_SETFD
, FD_CLOEXEC
);
1054 * Tell the parent we're ready to go
1056 close(child_ready_pipe
[1]);
1059 * Wait until the parent tells us to go.
1061 if (read(go_pipe
[0], &bf
, 1) == -1)
1062 perror("unable to read pipe");
1064 execvp(argv
[0], (char **)argv
);
1068 kill(getppid(), SIGUSR1
);
1072 if (perf_target__none(target
))
1073 evlist
->threads
->map
[0] = evlist
->workload
.pid
;
1075 close(child_ready_pipe
[1]);
1078 * wait for child to settle
1080 if (read(child_ready_pipe
[0], &bf
, 1) == -1) {
1081 perror("unable to read pipe");
1082 goto out_close_pipes
;
1085 fcntl(go_pipe
[1], F_SETFD
, FD_CLOEXEC
);
1086 evlist
->workload
.cork_fd
= go_pipe
[1];
1087 close(child_ready_pipe
[0]);
1093 out_close_ready_pipe
:
1094 close(child_ready_pipe
[0]);
1095 close(child_ready_pipe
[1]);
1099 int perf_evlist__start_workload(struct perf_evlist
*evlist
)
1101 if (evlist
->workload
.cork_fd
> 0) {
1105 * Remove the cork, let it rip!
1107 ret
= write(evlist
->workload
.cork_fd
, &bf
, 1);
1109 perror("enable to write to pipe");
1111 close(evlist
->workload
.cork_fd
);
1118 int perf_evlist__parse_sample(struct perf_evlist
*evlist
, union perf_event
*event
,
1119 struct perf_sample
*sample
)
1121 struct perf_evsel
*evsel
= perf_evlist__event2evsel(evlist
, event
);
1125 return perf_evsel__parse_sample(evsel
, event
, sample
);
1128 size_t perf_evlist__fprintf(struct perf_evlist
*evlist
, FILE *fp
)
1130 struct perf_evsel
*evsel
;
1133 list_for_each_entry(evsel
, &evlist
->entries
, node
) {
1134 printed
+= fprintf(fp
, "%s%s", evsel
->idx
? ", " : "",
1135 perf_evsel__name(evsel
));
1138 return printed
+ fprintf(fp
, "\n");;
1141 int perf_evlist__strerror_tp(struct perf_evlist
*evlist __maybe_unused
,
1142 int err
, char *buf
, size_t size
)
1148 scnprintf(buf
, size
, "%s",
1149 "Error:\tUnable to find debugfs\n"
1150 "Hint:\tWas your kernel was compiled with debugfs support?\n"
1151 "Hint:\tIs the debugfs filesystem mounted?\n"
1152 "Hint:\tTry 'sudo mount -t debugfs nodev /sys/kernel/debug'");
1155 scnprintf(buf
, size
,
1156 "Error:\tNo permissions to read %s/tracing/events/raw_syscalls\n"
1157 "Hint:\tTry 'sudo mount -o remount,mode=755 %s'\n",
1158 debugfs_mountpoint
, debugfs_mountpoint
);
1161 scnprintf(buf
, size
, "%s", strerror_r(err
, sbuf
, sizeof(sbuf
)));
1168 int perf_evlist__strerror_open(struct perf_evlist
*evlist __maybe_unused
,
1169 int err
, char *buf
, size_t size
)
1172 char sbuf
[128], *emsg
= strerror_r(err
, sbuf
, sizeof(sbuf
));
1177 printed
= scnprintf(buf
, size
,
1179 "Hint:\tCheck /proc/sys/kernel/perf_event_paranoid setting.", emsg
);
1181 if (filename__read_int("/proc/sys/kernel/perf_event_paranoid", &value
))
1184 printed
+= scnprintf(buf
+ printed
, size
- printed
, "\nHint:\t");
1187 printed
+= scnprintf(buf
+ printed
, size
- printed
,
1188 "For your workloads it needs to be <= 1\nHint:\t");
1190 printed
+= scnprintf(buf
+ printed
, size
- printed
,
1191 "For system wide tracing it needs to be set to -1");
1193 printed
+= scnprintf(buf
+ printed
, size
- printed
,
1194 ".\nHint:\tThe current value is %d.", value
);
1197 scnprintf(buf
, size
, "%s", emsg
);