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)
13 #include "thread_map.h"
19 #include "parse-events.h"
23 #include <linux/bitops.h>
24 #include <linux/hash.h>
26 #define FD(e, x, y) (*(int *)xyarray__entry(e->fd, x, y))
27 #define SID(e, x, y) xyarray__entry(e->sample_id, x, y)
29 void perf_evlist__init(struct perf_evlist
*evlist
, struct cpu_map
*cpus
,
30 struct thread_map
*threads
)
34 for (i
= 0; i
< PERF_EVLIST__HLIST_SIZE
; ++i
)
35 INIT_HLIST_HEAD(&evlist
->heads
[i
]);
36 INIT_LIST_HEAD(&evlist
->entries
);
37 perf_evlist__set_maps(evlist
, cpus
, threads
);
38 evlist
->workload
.pid
= -1;
41 struct perf_evlist
*perf_evlist__new(struct cpu_map
*cpus
,
42 struct thread_map
*threads
)
44 struct perf_evlist
*evlist
= zalloc(sizeof(*evlist
));
47 perf_evlist__init(evlist
, cpus
, threads
);
52 void perf_evlist__config(struct perf_evlist
*evlist
,
53 struct perf_record_opts
*opts
)
55 struct perf_evsel
*evsel
;
57 * Set the evsel leader links before we configure attributes,
58 * since some might depend on this info.
61 perf_evlist__set_leader(evlist
);
63 if (evlist
->cpus
->map
[0] < 0)
64 opts
->no_inherit
= true;
66 list_for_each_entry(evsel
, &evlist
->entries
, node
) {
67 perf_evsel__config(evsel
, opts
);
69 if (evlist
->nr_entries
> 1)
70 perf_evsel__set_sample_id(evsel
);
74 static void perf_evlist__purge(struct perf_evlist
*evlist
)
76 struct perf_evsel
*pos
, *n
;
78 list_for_each_entry_safe(pos
, n
, &evlist
->entries
, node
) {
79 list_del_init(&pos
->node
);
80 perf_evsel__delete(pos
);
83 evlist
->nr_entries
= 0;
86 void perf_evlist__exit(struct perf_evlist
*evlist
)
91 evlist
->pollfd
= NULL
;
94 void perf_evlist__delete(struct perf_evlist
*evlist
)
96 perf_evlist__purge(evlist
);
97 perf_evlist__exit(evlist
);
101 void perf_evlist__add(struct perf_evlist
*evlist
, struct perf_evsel
*entry
)
103 list_add_tail(&entry
->node
, &evlist
->entries
);
104 ++evlist
->nr_entries
;
107 void perf_evlist__splice_list_tail(struct perf_evlist
*evlist
,
108 struct list_head
*list
,
111 list_splice_tail(list
, &evlist
->entries
);
112 evlist
->nr_entries
+= nr_entries
;
115 void __perf_evlist__set_leader(struct list_head
*list
)
117 struct perf_evsel
*evsel
, *leader
;
119 leader
= list_entry(list
->next
, struct perf_evsel
, node
);
120 evsel
= list_entry(list
->prev
, struct perf_evsel
, node
);
122 leader
->nr_members
= evsel
->idx
- leader
->idx
+ 1;
124 list_for_each_entry(evsel
, list
, node
) {
125 evsel
->leader
= leader
;
129 void perf_evlist__set_leader(struct perf_evlist
*evlist
)
131 if (evlist
->nr_entries
) {
132 evlist
->nr_groups
= evlist
->nr_entries
> 1 ? 1 : 0;
133 __perf_evlist__set_leader(&evlist
->entries
);
137 int perf_evlist__add_default(struct perf_evlist
*evlist
)
139 struct perf_event_attr attr
= {
140 .type
= PERF_TYPE_HARDWARE
,
141 .config
= PERF_COUNT_HW_CPU_CYCLES
,
143 struct perf_evsel
*evsel
;
145 event_attr_init(&attr
);
147 evsel
= perf_evsel__new(&attr
, 0);
151 /* use strdup() because free(evsel) assumes name is allocated */
152 evsel
->name
= strdup("cycles");
156 perf_evlist__add(evlist
, evsel
);
159 perf_evsel__delete(evsel
);
164 static int perf_evlist__add_attrs(struct perf_evlist
*evlist
,
165 struct perf_event_attr
*attrs
, size_t nr_attrs
)
167 struct perf_evsel
*evsel
, *n
;
171 for (i
= 0; i
< nr_attrs
; i
++) {
172 evsel
= perf_evsel__new(attrs
+ i
, evlist
->nr_entries
+ i
);
174 goto out_delete_partial_list
;
175 list_add_tail(&evsel
->node
, &head
);
178 perf_evlist__splice_list_tail(evlist
, &head
, nr_attrs
);
182 out_delete_partial_list
:
183 list_for_each_entry_safe(evsel
, n
, &head
, node
)
184 perf_evsel__delete(evsel
);
188 int __perf_evlist__add_default_attrs(struct perf_evlist
*evlist
,
189 struct perf_event_attr
*attrs
, size_t nr_attrs
)
193 for (i
= 0; i
< nr_attrs
; i
++)
194 event_attr_init(attrs
+ i
);
196 return perf_evlist__add_attrs(evlist
, attrs
, nr_attrs
);
200 perf_evlist__find_tracepoint_by_id(struct perf_evlist
*evlist
, int id
)
202 struct perf_evsel
*evsel
;
204 list_for_each_entry(evsel
, &evlist
->entries
, node
) {
205 if (evsel
->attr
.type
== PERF_TYPE_TRACEPOINT
&&
206 (int)evsel
->attr
.config
== id
)
213 int perf_evlist__add_newtp(struct perf_evlist
*evlist
,
214 const char *sys
, const char *name
, void *handler
)
216 struct perf_evsel
*evsel
;
218 evsel
= perf_evsel__newtp(sys
, name
, evlist
->nr_entries
);
222 evsel
->handler
.func
= handler
;
223 perf_evlist__add(evlist
, evsel
);
227 void perf_evlist__disable(struct perf_evlist
*evlist
)
230 struct perf_evsel
*pos
;
232 for (cpu
= 0; cpu
< evlist
->cpus
->nr
; cpu
++) {
233 list_for_each_entry(pos
, &evlist
->entries
, node
) {
234 if (!perf_evsel__is_group_leader(pos
))
236 for (thread
= 0; thread
< evlist
->threads
->nr
; thread
++)
237 ioctl(FD(pos
, cpu
, thread
),
238 PERF_EVENT_IOC_DISABLE
, 0);
243 void perf_evlist__enable(struct perf_evlist
*evlist
)
246 struct perf_evsel
*pos
;
248 for (cpu
= 0; cpu
< cpu_map__nr(evlist
->cpus
); cpu
++) {
249 list_for_each_entry(pos
, &evlist
->entries
, node
) {
250 if (!perf_evsel__is_group_leader(pos
))
252 for (thread
= 0; thread
< evlist
->threads
->nr
; thread
++)
253 ioctl(FD(pos
, cpu
, thread
),
254 PERF_EVENT_IOC_ENABLE
, 0);
259 static int perf_evlist__alloc_pollfd(struct perf_evlist
*evlist
)
261 int nfds
= cpu_map__nr(evlist
->cpus
) * evlist
->threads
->nr
* evlist
->nr_entries
;
262 evlist
->pollfd
= malloc(sizeof(struct pollfd
) * nfds
);
263 return evlist
->pollfd
!= NULL
? 0 : -ENOMEM
;
266 void perf_evlist__add_pollfd(struct perf_evlist
*evlist
, int fd
)
268 fcntl(fd
, F_SETFL
, O_NONBLOCK
);
269 evlist
->pollfd
[evlist
->nr_fds
].fd
= fd
;
270 evlist
->pollfd
[evlist
->nr_fds
].events
= POLLIN
;
274 static void perf_evlist__id_hash(struct perf_evlist
*evlist
,
275 struct perf_evsel
*evsel
,
276 int cpu
, int thread
, u64 id
)
279 struct perf_sample_id
*sid
= SID(evsel
, cpu
, thread
);
283 hash
= hash_64(sid
->id
, PERF_EVLIST__HLIST_BITS
);
284 hlist_add_head(&sid
->node
, &evlist
->heads
[hash
]);
287 void perf_evlist__id_add(struct perf_evlist
*evlist
, struct perf_evsel
*evsel
,
288 int cpu
, int thread
, u64 id
)
290 perf_evlist__id_hash(evlist
, evsel
, cpu
, thread
, id
);
291 evsel
->id
[evsel
->ids
++] = id
;
294 static int perf_evlist__id_add_fd(struct perf_evlist
*evlist
,
295 struct perf_evsel
*evsel
,
296 int cpu
, int thread
, int fd
)
298 u64 read_data
[4] = { 0, };
299 int id_idx
= 1; /* The first entry is the counter value */
301 if (!(evsel
->attr
.read_format
& PERF_FORMAT_ID
) ||
302 read(fd
, &read_data
, sizeof(read_data
)) == -1)
305 if (evsel
->attr
.read_format
& PERF_FORMAT_TOTAL_TIME_ENABLED
)
307 if (evsel
->attr
.read_format
& PERF_FORMAT_TOTAL_TIME_RUNNING
)
310 perf_evlist__id_add(evlist
, evsel
, cpu
, thread
, read_data
[id_idx
]);
314 struct perf_evsel
*perf_evlist__id2evsel(struct perf_evlist
*evlist
, u64 id
)
316 struct hlist_head
*head
;
317 struct perf_sample_id
*sid
;
320 if (evlist
->nr_entries
== 1)
321 return perf_evlist__first(evlist
);
323 hash
= hash_64(id
, PERF_EVLIST__HLIST_BITS
);
324 head
= &evlist
->heads
[hash
];
326 hlist_for_each_entry(sid
, head
, node
)
330 if (!perf_evlist__sample_id_all(evlist
))
331 return perf_evlist__first(evlist
);
336 union perf_event
*perf_evlist__mmap_read(struct perf_evlist
*evlist
, int idx
)
338 struct perf_mmap
*md
= &evlist
->mmap
[idx
];
339 unsigned int head
= perf_mmap__read_head(md
);
340 unsigned int old
= md
->prev
;
341 unsigned char *data
= md
->base
+ page_size
;
342 union perf_event
*event
= NULL
;
344 if (evlist
->overwrite
) {
346 * If we're further behind than half the buffer, there's a chance
347 * the writer will bite our tail and mess up the samples under us.
349 * If we somehow ended up ahead of the head, we got messed up.
351 * In either case, truncate and restart at head.
353 int diff
= head
- old
;
354 if (diff
> md
->mask
/ 2 || diff
< 0) {
355 fprintf(stderr
, "WARNING: failed to keep up with mmap data.\n");
358 * head points to a known good entry, start there.
367 event
= (union perf_event
*)&data
[old
& md
->mask
];
368 size
= event
->header
.size
;
371 * Event straddles the mmap boundary -- header should always
372 * be inside due to u64 alignment of output.
374 if ((old
& md
->mask
) + size
!= ((old
+ size
) & md
->mask
)) {
375 unsigned int offset
= old
;
376 unsigned int len
= min(sizeof(*event
), size
), cpy
;
377 void *dst
= &md
->event_copy
;
380 cpy
= min(md
->mask
+ 1 - (offset
& md
->mask
), len
);
381 memcpy(dst
, &data
[offset
& md
->mask
], cpy
);
387 event
= &md
->event_copy
;
395 if (!evlist
->overwrite
)
396 perf_mmap__write_tail(md
, old
);
401 void perf_evlist__munmap(struct perf_evlist
*evlist
)
405 for (i
= 0; i
< evlist
->nr_mmaps
; i
++) {
406 if (evlist
->mmap
[i
].base
!= NULL
) {
407 munmap(evlist
->mmap
[i
].base
, evlist
->mmap_len
);
408 evlist
->mmap
[i
].base
= NULL
;
416 static int perf_evlist__alloc_mmap(struct perf_evlist
*evlist
)
418 evlist
->nr_mmaps
= cpu_map__nr(evlist
->cpus
);
419 if (cpu_map__all(evlist
->cpus
))
420 evlist
->nr_mmaps
= evlist
->threads
->nr
;
421 evlist
->mmap
= zalloc(evlist
->nr_mmaps
* sizeof(struct perf_mmap
));
422 return evlist
->mmap
!= NULL
? 0 : -ENOMEM
;
425 static int __perf_evlist__mmap(struct perf_evlist
*evlist
,
426 int idx
, int prot
, int mask
, int fd
)
428 evlist
->mmap
[idx
].prev
= 0;
429 evlist
->mmap
[idx
].mask
= mask
;
430 evlist
->mmap
[idx
].base
= mmap(NULL
, evlist
->mmap_len
, prot
,
432 if (evlist
->mmap
[idx
].base
== MAP_FAILED
) {
433 evlist
->mmap
[idx
].base
= NULL
;
437 perf_evlist__add_pollfd(evlist
, fd
);
441 static int perf_evlist__mmap_per_cpu(struct perf_evlist
*evlist
, int prot
, int mask
)
443 struct perf_evsel
*evsel
;
446 for (cpu
= 0; cpu
< evlist
->cpus
->nr
; cpu
++) {
449 for (thread
= 0; thread
< evlist
->threads
->nr
; thread
++) {
450 list_for_each_entry(evsel
, &evlist
->entries
, node
) {
451 int fd
= FD(evsel
, cpu
, thread
);
455 if (__perf_evlist__mmap(evlist
, cpu
,
456 prot
, mask
, output
) < 0)
459 if (ioctl(fd
, PERF_EVENT_IOC_SET_OUTPUT
, output
) != 0)
463 if ((evsel
->attr
.read_format
& PERF_FORMAT_ID
) &&
464 perf_evlist__id_add_fd(evlist
, evsel
, cpu
, thread
, fd
) < 0)
473 for (cpu
= 0; cpu
< evlist
->cpus
->nr
; cpu
++) {
474 if (evlist
->mmap
[cpu
].base
!= NULL
) {
475 munmap(evlist
->mmap
[cpu
].base
, evlist
->mmap_len
);
476 evlist
->mmap
[cpu
].base
= NULL
;
482 static int perf_evlist__mmap_per_thread(struct perf_evlist
*evlist
, int prot
, int mask
)
484 struct perf_evsel
*evsel
;
487 for (thread
= 0; thread
< evlist
->threads
->nr
; thread
++) {
490 list_for_each_entry(evsel
, &evlist
->entries
, node
) {
491 int fd
= FD(evsel
, 0, thread
);
495 if (__perf_evlist__mmap(evlist
, thread
,
496 prot
, mask
, output
) < 0)
499 if (ioctl(fd
, PERF_EVENT_IOC_SET_OUTPUT
, output
) != 0)
503 if ((evsel
->attr
.read_format
& PERF_FORMAT_ID
) &&
504 perf_evlist__id_add_fd(evlist
, evsel
, 0, thread
, fd
) < 0)
512 for (thread
= 0; thread
< evlist
->threads
->nr
; thread
++) {
513 if (evlist
->mmap
[thread
].base
!= NULL
) {
514 munmap(evlist
->mmap
[thread
].base
, evlist
->mmap_len
);
515 evlist
->mmap
[thread
].base
= NULL
;
521 /** perf_evlist__mmap - Create per cpu maps to receive events
523 * @evlist - list of events
524 * @pages - map length in pages
525 * @overwrite - overwrite older events?
527 * If overwrite is false the user needs to signal event consuption using:
529 * struct perf_mmap *m = &evlist->mmap[cpu];
530 * unsigned int head = perf_mmap__read_head(m);
532 * perf_mmap__write_tail(m, head)
534 * Using perf_evlist__read_on_cpu does this automatically.
536 int perf_evlist__mmap(struct perf_evlist
*evlist
, unsigned int pages
,
539 struct perf_evsel
*evsel
;
540 const struct cpu_map
*cpus
= evlist
->cpus
;
541 const struct thread_map
*threads
= evlist
->threads
;
542 int prot
= PROT_READ
| (overwrite
? 0 : PROT_WRITE
), mask
;
544 /* 512 kiB: default amount of unprivileged mlocked memory */
545 if (pages
== UINT_MAX
)
546 pages
= (512 * 1024) / page_size
;
547 else if (!is_power_of_2(pages
))
550 mask
= pages
* page_size
- 1;
552 if (evlist
->mmap
== NULL
&& perf_evlist__alloc_mmap(evlist
) < 0)
555 if (evlist
->pollfd
== NULL
&& perf_evlist__alloc_pollfd(evlist
) < 0)
558 evlist
->overwrite
= overwrite
;
559 evlist
->mmap_len
= (pages
+ 1) * page_size
;
561 list_for_each_entry(evsel
, &evlist
->entries
, node
) {
562 if ((evsel
->attr
.read_format
& PERF_FORMAT_ID
) &&
563 evsel
->sample_id
== NULL
&&
564 perf_evsel__alloc_id(evsel
, cpu_map__nr(cpus
), threads
->nr
) < 0)
568 if (cpu_map__all(cpus
))
569 return perf_evlist__mmap_per_thread(evlist
, prot
, mask
);
571 return perf_evlist__mmap_per_cpu(evlist
, prot
, mask
);
574 int perf_evlist__create_maps(struct perf_evlist
*evlist
,
575 struct perf_target
*target
)
577 evlist
->threads
= thread_map__new_str(target
->pid
, target
->tid
,
580 if (evlist
->threads
== NULL
)
583 if (perf_target__has_task(target
))
584 evlist
->cpus
= cpu_map__dummy_new();
585 else if (!perf_target__has_cpu(target
) && !target
->uses_mmap
)
586 evlist
->cpus
= cpu_map__dummy_new();
588 evlist
->cpus
= cpu_map__new(target
->cpu_list
);
590 if (evlist
->cpus
== NULL
)
591 goto out_delete_threads
;
596 thread_map__delete(evlist
->threads
);
600 void perf_evlist__delete_maps(struct perf_evlist
*evlist
)
602 cpu_map__delete(evlist
->cpus
);
603 thread_map__delete(evlist
->threads
);
605 evlist
->threads
= NULL
;
608 int perf_evlist__apply_filters(struct perf_evlist
*evlist
)
610 struct perf_evsel
*evsel
;
612 const int ncpus
= cpu_map__nr(evlist
->cpus
),
613 nthreads
= evlist
->threads
->nr
;
615 list_for_each_entry(evsel
, &evlist
->entries
, node
) {
616 if (evsel
->filter
== NULL
)
619 err
= perf_evsel__set_filter(evsel
, ncpus
, nthreads
, evsel
->filter
);
627 int perf_evlist__set_filter(struct perf_evlist
*evlist
, const char *filter
)
629 struct perf_evsel
*evsel
;
631 const int ncpus
= cpu_map__nr(evlist
->cpus
),
632 nthreads
= evlist
->threads
->nr
;
634 list_for_each_entry(evsel
, &evlist
->entries
, node
) {
635 err
= perf_evsel__set_filter(evsel
, ncpus
, nthreads
, filter
);
643 bool perf_evlist__valid_sample_type(struct perf_evlist
*evlist
)
645 struct perf_evsel
*first
= perf_evlist__first(evlist
), *pos
= first
;
647 list_for_each_entry_continue(pos
, &evlist
->entries
, node
) {
648 if (first
->attr
.sample_type
!= pos
->attr
.sample_type
)
655 u64
perf_evlist__sample_type(struct perf_evlist
*evlist
)
657 struct perf_evsel
*first
= perf_evlist__first(evlist
);
658 return first
->attr
.sample_type
;
661 u16
perf_evlist__id_hdr_size(struct perf_evlist
*evlist
)
663 struct perf_evsel
*first
= perf_evlist__first(evlist
);
664 struct perf_sample
*data
;
668 if (!first
->attr
.sample_id_all
)
671 sample_type
= first
->attr
.sample_type
;
673 if (sample_type
& PERF_SAMPLE_TID
)
674 size
+= sizeof(data
->tid
) * 2;
676 if (sample_type
& PERF_SAMPLE_TIME
)
677 size
+= sizeof(data
->time
);
679 if (sample_type
& PERF_SAMPLE_ID
)
680 size
+= sizeof(data
->id
);
682 if (sample_type
& PERF_SAMPLE_STREAM_ID
)
683 size
+= sizeof(data
->stream_id
);
685 if (sample_type
& PERF_SAMPLE_CPU
)
686 size
+= sizeof(data
->cpu
) * 2;
691 bool perf_evlist__valid_sample_id_all(struct perf_evlist
*evlist
)
693 struct perf_evsel
*first
= perf_evlist__first(evlist
), *pos
= first
;
695 list_for_each_entry_continue(pos
, &evlist
->entries
, node
) {
696 if (first
->attr
.sample_id_all
!= pos
->attr
.sample_id_all
)
703 bool perf_evlist__sample_id_all(struct perf_evlist
*evlist
)
705 struct perf_evsel
*first
= perf_evlist__first(evlist
);
706 return first
->attr
.sample_id_all
;
709 void perf_evlist__set_selected(struct perf_evlist
*evlist
,
710 struct perf_evsel
*evsel
)
712 evlist
->selected
= evsel
;
715 int perf_evlist__open(struct perf_evlist
*evlist
)
717 struct perf_evsel
*evsel
;
718 int err
, ncpus
, nthreads
;
720 list_for_each_entry(evsel
, &evlist
->entries
, node
) {
721 err
= perf_evsel__open(evsel
, evlist
->cpus
, evlist
->threads
);
728 ncpus
= evlist
->cpus
? evlist
->cpus
->nr
: 1;
729 nthreads
= evlist
->threads
? evlist
->threads
->nr
: 1;
731 list_for_each_entry_reverse(evsel
, &evlist
->entries
, node
)
732 perf_evsel__close(evsel
, ncpus
, nthreads
);
738 int perf_evlist__prepare_workload(struct perf_evlist
*evlist
,
739 struct perf_record_opts
*opts
,
742 int child_ready_pipe
[2], go_pipe
[2];
745 if (pipe(child_ready_pipe
) < 0) {
746 perror("failed to create 'ready' pipe");
750 if (pipe(go_pipe
) < 0) {
751 perror("failed to create 'go' pipe");
752 goto out_close_ready_pipe
;
755 evlist
->workload
.pid
= fork();
756 if (evlist
->workload
.pid
< 0) {
757 perror("failed to fork");
758 goto out_close_pipes
;
761 if (!evlist
->workload
.pid
) {
762 if (opts
->pipe_output
)
765 close(child_ready_pipe
[0]);
767 fcntl(go_pipe
[0], F_SETFD
, FD_CLOEXEC
);
770 * Do a dummy execvp to get the PLT entry resolved,
771 * so we avoid the resolver overhead on the real
774 execvp("", (char **)argv
);
777 * Tell the parent we're ready to go
779 close(child_ready_pipe
[1]);
782 * Wait until the parent tells us to go.
784 if (read(go_pipe
[0], &bf
, 1) == -1)
785 perror("unable to read pipe");
787 execvp(argv
[0], (char **)argv
);
790 kill(getppid(), SIGUSR1
);
794 if (perf_target__none(&opts
->target
))
795 evlist
->threads
->map
[0] = evlist
->workload
.pid
;
797 close(child_ready_pipe
[1]);
800 * wait for child to settle
802 if (read(child_ready_pipe
[0], &bf
, 1) == -1) {
803 perror("unable to read pipe");
804 goto out_close_pipes
;
807 evlist
->workload
.cork_fd
= go_pipe
[1];
808 close(child_ready_pipe
[0]);
814 out_close_ready_pipe
:
815 close(child_ready_pipe
[0]);
816 close(child_ready_pipe
[1]);
820 int perf_evlist__start_workload(struct perf_evlist
*evlist
)
822 if (evlist
->workload
.cork_fd
> 0) {
824 * Remove the cork, let it rip!
826 return close(evlist
->workload
.cork_fd
);
832 int perf_evlist__parse_sample(struct perf_evlist
*evlist
, union perf_event
*event
,
833 struct perf_sample
*sample
)
835 struct perf_evsel
*evsel
= perf_evlist__first(evlist
);
836 return perf_evsel__parse_sample(evsel
, event
, sample
);
839 size_t perf_evlist__fprintf(struct perf_evlist
*evlist
, FILE *fp
)
841 struct perf_evsel
*evsel
;
844 list_for_each_entry(evsel
, &evlist
->entries
, node
) {
845 printed
+= fprintf(fp
, "%s%s", evsel
->idx
? ", " : "",
846 perf_evsel__name(evsel
));
849 return printed
+ fprintf(fp
, "\n");;