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"
25 #include "parse-events.h"
26 #include <subcmd/parse-options.h>
28 #include <sys/ioctl.h>
31 #include <linux/bitops.h>
32 #include <linux/hash.h>
33 #include <linux/log2.h>
34 #include <linux/err.h>
36 static void perf_mmap__munmap(struct perf_mmap *map);
37 static void perf_mmap__put(struct perf_mmap *map);
39 #define FD(e, x, y) (*(int *)xyarray__entry(e->fd, x, y))
40 #define SID(e, x, y) xyarray__entry(e->sample_id, x, y)
42 void perf_evlist__init(struct perf_evlist *evlist, struct cpu_map *cpus,
43 struct thread_map *threads)
47 for (i = 0; i < PERF_EVLIST__HLIST_SIZE; ++i)
48 INIT_HLIST_HEAD(&evlist->heads[i]);
49 INIT_LIST_HEAD(&evlist->entries);
50 perf_evlist__set_maps(evlist, cpus, threads);
51 fdarray__init(&evlist->pollfd, 64);
52 evlist->workload.pid = -1;
53 evlist->bkw_mmap_state = BKW_MMAP_NOTREADY;
56 struct perf_evlist *perf_evlist__new(void)
58 struct perf_evlist *evlist = zalloc(sizeof(*evlist));
61 perf_evlist__init(evlist, NULL, NULL);
66 struct perf_evlist *perf_evlist__new_default(void)
68 struct perf_evlist *evlist = perf_evlist__new();
70 if (evlist && perf_evlist__add_default(evlist)) {
71 perf_evlist__delete(evlist);
78 struct perf_evlist *perf_evlist__new_dummy(void)
80 struct perf_evlist *evlist = perf_evlist__new();
82 if (evlist && perf_evlist__add_dummy(evlist)) {
83 perf_evlist__delete(evlist);
91 * perf_evlist__set_id_pos - set the positions of event ids.
92 * @evlist: selected event list
94 * Events with compatible sample types all have the same id_pos
95 * and is_pos. For convenience, put a copy on evlist.
97 void perf_evlist__set_id_pos(struct perf_evlist *evlist)
99 struct perf_evsel *first = perf_evlist__first(evlist);
101 evlist->id_pos = first->id_pos;
102 evlist->is_pos = first->is_pos;
105 static void perf_evlist__update_id_pos(struct perf_evlist *evlist)
107 struct perf_evsel *evsel;
109 evlist__for_each_entry(evlist, evsel)
110 perf_evsel__calc_id_pos(evsel);
112 perf_evlist__set_id_pos(evlist);
115 static void perf_evlist__purge(struct perf_evlist *evlist)
117 struct perf_evsel *pos, *n;
119 evlist__for_each_entry_safe(evlist, n, pos) {
120 list_del_init(&pos->node);
122 perf_evsel__delete(pos);
125 evlist->nr_entries = 0;
128 void perf_evlist__exit(struct perf_evlist *evlist)
130 zfree(&evlist->mmap);
131 zfree(&evlist->backward_mmap);
132 fdarray__exit(&evlist->pollfd);
135 void perf_evlist__delete(struct perf_evlist *evlist)
140 perf_evlist__munmap(evlist);
141 perf_evlist__close(evlist);
142 cpu_map__put(evlist->cpus);
143 thread_map__put(evlist->threads);
145 evlist->threads = NULL;
146 perf_evlist__purge(evlist);
147 perf_evlist__exit(evlist);
151 static void __perf_evlist__propagate_maps(struct perf_evlist *evlist,
152 struct perf_evsel *evsel)
155 * We already have cpus for evsel (via PMU sysfs) so
156 * keep it, if there's no target cpu list defined.
158 if (!evsel->own_cpus || evlist->has_user_cpus) {
159 cpu_map__put(evsel->cpus);
160 evsel->cpus = cpu_map__get(evlist->cpus);
161 } else if (evsel->cpus != evsel->own_cpus) {
162 cpu_map__put(evsel->cpus);
163 evsel->cpus = cpu_map__get(evsel->own_cpus);
166 thread_map__put(evsel->threads);
167 evsel->threads = thread_map__get(evlist->threads);
170 static void perf_evlist__propagate_maps(struct perf_evlist *evlist)
172 struct perf_evsel *evsel;
174 evlist__for_each_entry(evlist, evsel)
175 __perf_evlist__propagate_maps(evlist, evsel);
178 void perf_evlist__add(struct perf_evlist *evlist, struct perf_evsel *entry)
180 entry->evlist = evlist;
181 list_add_tail(&entry->node, &evlist->entries);
182 entry->idx = evlist->nr_entries;
183 entry->tracking = !entry->idx;
185 if (!evlist->nr_entries++)
186 perf_evlist__set_id_pos(evlist);
188 __perf_evlist__propagate_maps(evlist, entry);
191 void perf_evlist__remove(struct perf_evlist *evlist, struct perf_evsel *evsel)
193 evsel->evlist = NULL;
194 list_del_init(&evsel->node);
195 evlist->nr_entries -= 1;
198 void perf_evlist__splice_list_tail(struct perf_evlist *evlist,
199 struct list_head *list)
201 struct perf_evsel *evsel, *temp;
203 __evlist__for_each_entry_safe(list, temp, evsel) {
204 list_del_init(&evsel->node);
205 perf_evlist__add(evlist, evsel);
209 void __perf_evlist__set_leader(struct list_head *list)
211 struct perf_evsel *evsel, *leader;
213 leader = list_entry(list->next, struct perf_evsel, node);
214 evsel = list_entry(list->prev, struct perf_evsel, node);
216 leader->nr_members = evsel->idx - leader->idx + 1;
218 __evlist__for_each_entry(list, evsel) {
219 evsel->leader = leader;
223 void perf_evlist__set_leader(struct perf_evlist *evlist)
225 if (evlist->nr_entries) {
226 evlist->nr_groups = evlist->nr_entries > 1 ? 1 : 0;
227 __perf_evlist__set_leader(&evlist->entries);
231 void perf_event_attr__set_max_precise_ip(struct perf_event_attr *attr)
233 attr->precise_ip = 3;
235 while (attr->precise_ip != 0) {
236 int fd = sys_perf_event_open(attr, 0, -1, -1, 0);
245 int perf_evlist__add_default(struct perf_evlist *evlist)
247 struct perf_evsel *evsel = perf_evsel__new_cycles();
252 perf_evlist__add(evlist, evsel);
256 int perf_evlist__add_dummy(struct perf_evlist *evlist)
258 struct perf_event_attr attr = {
259 .type = PERF_TYPE_SOFTWARE,
260 .config = PERF_COUNT_SW_DUMMY,
261 .size = sizeof(attr), /* to capture ABI version */
263 struct perf_evsel *evsel = perf_evsel__new(&attr);
268 perf_evlist__add(evlist, evsel);
272 static int perf_evlist__add_attrs(struct perf_evlist *evlist,
273 struct perf_event_attr *attrs, size_t nr_attrs)
275 struct perf_evsel *evsel, *n;
279 for (i = 0; i < nr_attrs; i++) {
280 evsel = perf_evsel__new_idx(attrs + i, evlist->nr_entries + i);
282 goto out_delete_partial_list;
283 list_add_tail(&evsel->node, &head);
286 perf_evlist__splice_list_tail(evlist, &head);
290 out_delete_partial_list:
291 __evlist__for_each_entry_safe(&head, n, evsel)
292 perf_evsel__delete(evsel);
296 int __perf_evlist__add_default_attrs(struct perf_evlist *evlist,
297 struct perf_event_attr *attrs, size_t nr_attrs)
301 for (i = 0; i < nr_attrs; i++)
302 event_attr_init(attrs + i);
304 return perf_evlist__add_attrs(evlist, attrs, nr_attrs);
308 perf_evlist__find_tracepoint_by_id(struct perf_evlist *evlist, int id)
310 struct perf_evsel *evsel;
312 evlist__for_each_entry(evlist, evsel) {
313 if (evsel->attr.type == PERF_TYPE_TRACEPOINT &&
314 (int)evsel->attr.config == id)
322 perf_evlist__find_tracepoint_by_name(struct perf_evlist *evlist,
325 struct perf_evsel *evsel;
327 evlist__for_each_entry(evlist, evsel) {
328 if ((evsel->attr.type == PERF_TYPE_TRACEPOINT) &&
329 (strcmp(evsel->name, name) == 0))
336 int perf_evlist__add_newtp(struct perf_evlist *evlist,
337 const char *sys, const char *name, void *handler)
339 struct perf_evsel *evsel = perf_evsel__newtp(sys, name);
344 evsel->handler = handler;
345 perf_evlist__add(evlist, evsel);
349 static int perf_evlist__nr_threads(struct perf_evlist *evlist,
350 struct perf_evsel *evsel)
352 if (evsel->system_wide)
355 return thread_map__nr(evlist->threads);
358 void perf_evlist__disable(struct perf_evlist *evlist)
360 struct perf_evsel *pos;
362 evlist__for_each_entry(evlist, pos) {
363 if (!perf_evsel__is_group_leader(pos) || !pos->fd)
365 perf_evsel__disable(pos);
368 evlist->enabled = false;
371 void perf_evlist__enable(struct perf_evlist *evlist)
373 struct perf_evsel *pos;
375 evlist__for_each_entry(evlist, pos) {
376 if (!perf_evsel__is_group_leader(pos) || !pos->fd)
378 perf_evsel__enable(pos);
381 evlist->enabled = true;
384 void perf_evlist__toggle_enable(struct perf_evlist *evlist)
386 (evlist->enabled ? perf_evlist__disable : perf_evlist__enable)(evlist);
389 static int perf_evlist__enable_event_cpu(struct perf_evlist *evlist,
390 struct perf_evsel *evsel, int cpu)
393 int nr_threads = perf_evlist__nr_threads(evlist, evsel);
398 for (thread = 0; thread < nr_threads; thread++) {
399 int err = ioctl(FD(evsel, cpu, thread), PERF_EVENT_IOC_ENABLE, 0);
406 static int perf_evlist__enable_event_thread(struct perf_evlist *evlist,
407 struct perf_evsel *evsel,
411 int nr_cpus = cpu_map__nr(evlist->cpus);
416 for (cpu = 0; cpu < nr_cpus; cpu++) {
417 int err = ioctl(FD(evsel, cpu, thread), PERF_EVENT_IOC_ENABLE, 0);
424 int perf_evlist__enable_event_idx(struct perf_evlist *evlist,
425 struct perf_evsel *evsel, int idx)
427 bool per_cpu_mmaps = !cpu_map__empty(evlist->cpus);
430 return perf_evlist__enable_event_cpu(evlist, evsel, idx);
432 return perf_evlist__enable_event_thread(evlist, evsel, idx);
435 int perf_evlist__alloc_pollfd(struct perf_evlist *evlist)
437 int nr_cpus = cpu_map__nr(evlist->cpus);
438 int nr_threads = thread_map__nr(evlist->threads);
440 struct perf_evsel *evsel;
442 evlist__for_each_entry(evlist, evsel) {
443 if (evsel->system_wide)
446 nfds += nr_cpus * nr_threads;
449 if (fdarray__available_entries(&evlist->pollfd) < nfds &&
450 fdarray__grow(&evlist->pollfd, nfds) < 0)
456 static int __perf_evlist__add_pollfd(struct perf_evlist *evlist, int fd,
457 struct perf_mmap *map, short revent)
459 int pos = fdarray__add(&evlist->pollfd, fd, revent | POLLERR | POLLHUP);
461 * Save the idx so that when we filter out fds POLLHUP'ed we can
462 * close the associated evlist->mmap[] entry.
465 evlist->pollfd.priv[pos].ptr = map;
467 fcntl(fd, F_SETFL, O_NONBLOCK);
473 int perf_evlist__add_pollfd(struct perf_evlist *evlist, int fd)
475 return __perf_evlist__add_pollfd(evlist, fd, NULL, POLLIN);
478 static void perf_evlist__munmap_filtered(struct fdarray *fda, int fd,
479 void *arg __maybe_unused)
481 struct perf_mmap *map = fda->priv[fd].ptr;
487 int perf_evlist__filter_pollfd(struct perf_evlist *evlist, short revents_and_mask)
489 return fdarray__filter(&evlist->pollfd, revents_and_mask,
490 perf_evlist__munmap_filtered, NULL);
493 int perf_evlist__poll(struct perf_evlist *evlist, int timeout)
495 return fdarray__poll(&evlist->pollfd, timeout);
498 static void perf_evlist__id_hash(struct perf_evlist *evlist,
499 struct perf_evsel *evsel,
500 int cpu, int thread, u64 id)
503 struct perf_sample_id *sid = SID(evsel, cpu, thread);
507 hash = hash_64(sid->id, PERF_EVLIST__HLIST_BITS);
508 hlist_add_head(&sid->node, &evlist->heads[hash]);
511 void perf_evlist__id_add(struct perf_evlist *evlist, struct perf_evsel *evsel,
512 int cpu, int thread, u64 id)
514 perf_evlist__id_hash(evlist, evsel, cpu, thread, id);
515 evsel->id[evsel->ids++] = id;
518 int perf_evlist__id_add_fd(struct perf_evlist *evlist,
519 struct perf_evsel *evsel,
520 int cpu, int thread, int fd)
522 u64 read_data[4] = { 0, };
523 int id_idx = 1; /* The first entry is the counter value */
527 ret = ioctl(fd, PERF_EVENT_IOC_ID, &id);
534 /* Legacy way to get event id.. All hail to old kernels! */
537 * This way does not work with group format read, so bail
540 if (perf_evlist__read_format(evlist) & PERF_FORMAT_GROUP)
543 if (!(evsel->attr.read_format & PERF_FORMAT_ID) ||
544 read(fd, &read_data, sizeof(read_data)) == -1)
547 if (evsel->attr.read_format & PERF_FORMAT_TOTAL_TIME_ENABLED)
549 if (evsel->attr.read_format & PERF_FORMAT_TOTAL_TIME_RUNNING)
552 id = read_data[id_idx];
555 perf_evlist__id_add(evlist, evsel, cpu, thread, id);
559 static void perf_evlist__set_sid_idx(struct perf_evlist *evlist,
560 struct perf_evsel *evsel, int idx, int cpu,
563 struct perf_sample_id *sid = SID(evsel, cpu, thread);
565 if (evlist->cpus && cpu >= 0)
566 sid->cpu = evlist->cpus->map[cpu];
569 if (!evsel->system_wide && evlist->threads && thread >= 0)
570 sid->tid = thread_map__pid(evlist->threads, thread);
575 struct perf_sample_id *perf_evlist__id2sid(struct perf_evlist *evlist, u64 id)
577 struct hlist_head *head;
578 struct perf_sample_id *sid;
581 hash = hash_64(id, PERF_EVLIST__HLIST_BITS);
582 head = &evlist->heads[hash];
584 hlist_for_each_entry(sid, head, node)
591 struct perf_evsel *perf_evlist__id2evsel(struct perf_evlist *evlist, u64 id)
593 struct perf_sample_id *sid;
595 if (evlist->nr_entries == 1 || !id)
596 return perf_evlist__first(evlist);
598 sid = perf_evlist__id2sid(evlist, id);
602 if (!perf_evlist__sample_id_all(evlist))
603 return perf_evlist__first(evlist);
608 struct perf_evsel *perf_evlist__id2evsel_strict(struct perf_evlist *evlist,
611 struct perf_sample_id *sid;
616 sid = perf_evlist__id2sid(evlist, id);
623 static int perf_evlist__event2id(struct perf_evlist *evlist,
624 union perf_event *event, u64 *id)
626 const u64 *array = event->sample.array;
629 n = (event->header.size - sizeof(event->header)) >> 3;
631 if (event->header.type == PERF_RECORD_SAMPLE) {
632 if (evlist->id_pos >= n)
634 *id = array[evlist->id_pos];
636 if (evlist->is_pos > n)
644 struct perf_evsel *perf_evlist__event2evsel(struct perf_evlist *evlist,
645 union perf_event *event)
647 struct perf_evsel *first = perf_evlist__first(evlist);
648 struct hlist_head *head;
649 struct perf_sample_id *sid;
653 if (evlist->nr_entries == 1)
656 if (!first->attr.sample_id_all &&
657 event->header.type != PERF_RECORD_SAMPLE)
660 if (perf_evlist__event2id(evlist, event, &id))
663 /* Synthesized events have an id of zero */
667 hash = hash_64(id, PERF_EVLIST__HLIST_BITS);
668 head = &evlist->heads[hash];
670 hlist_for_each_entry(sid, head, node) {
677 static int perf_evlist__set_paused(struct perf_evlist *evlist, bool value)
681 if (!evlist->backward_mmap)
684 for (i = 0; i < evlist->nr_mmaps; i++) {
685 int fd = evlist->backward_mmap[i].fd;
690 err = ioctl(fd, PERF_EVENT_IOC_PAUSE_OUTPUT, value ? 1 : 0);
697 static int perf_evlist__pause(struct perf_evlist *evlist)
699 return perf_evlist__set_paused(evlist, true);
702 static int perf_evlist__resume(struct perf_evlist *evlist)
704 return perf_evlist__set_paused(evlist, false);
707 /* When check_messup is true, 'end' must points to a good entry */
708 static union perf_event *
709 perf_mmap__read(struct perf_mmap *md, bool check_messup, u64 start,
712 unsigned char *data = md->base + page_size;
713 union perf_event *event = NULL;
714 int diff = end - start;
718 * If we're further behind than half the buffer, there's a chance
719 * the writer will bite our tail and mess up the samples under us.
721 * If we somehow ended up ahead of the 'end', we got messed up.
723 * In either case, truncate and restart at 'end'.
725 if (diff > md->mask / 2 || diff < 0) {
726 fprintf(stderr, "WARNING: failed to keep up with mmap data.\n");
729 * 'end' points to a known good entry, start there.
736 if (diff >= (int)sizeof(event->header)) {
739 event = (union perf_event *)&data[start & md->mask];
740 size = event->header.size;
742 if (size < sizeof(event->header) || diff < (int)size) {
748 * Event straddles the mmap boundary -- header should always
749 * be inside due to u64 alignment of output.
751 if ((start & md->mask) + size != ((start + size) & md->mask)) {
752 unsigned int offset = start;
753 unsigned int len = min(sizeof(*event), size), cpy;
754 void *dst = md->event_copy;
757 cpy = min(md->mask + 1 - (offset & md->mask), len);
758 memcpy(dst, &data[offset & md->mask], cpy);
764 event = (union perf_event *) md->event_copy;
777 union perf_event *perf_mmap__read_forward(struct perf_mmap *md, bool check_messup)
783 * Check if event was unmapped due to a POLLHUP/POLLERR.
785 if (!refcount_read(&md->refcnt))
788 head = perf_mmap__read_head(md);
790 return perf_mmap__read(md, check_messup, old, head, &md->prev);
794 perf_mmap__read_backward(struct perf_mmap *md)
797 u64 start = md->prev;
800 * Check if event was unmapped due to a POLLHUP/POLLERR.
802 if (!refcount_read(&md->refcnt))
805 head = perf_mmap__read_head(md);
810 * 'head' pointer starts from 0. Kernel minus sizeof(record) form
811 * it each time when kernel writes to it, so in fact 'head' is
812 * negative. 'end' pointer is made manually by adding the size of
813 * the ring buffer to 'head' pointer, means the validate data can
814 * read is the whole ring buffer. If 'end' is positive, the ring
815 * buffer has not fully filled, so we must adjust 'end' to 0.
817 * However, since both 'head' and 'end' is unsigned, we can't
818 * simply compare 'end' against 0. Here we compare '-head' and
819 * the size of the ring buffer, where -head is the number of bytes
820 * kernel write to the ring buffer.
822 if (-head < (u64)(md->mask + 1))
825 end = head + md->mask + 1;
827 return perf_mmap__read(md, false, start, end, &md->prev);
830 union perf_event *perf_evlist__mmap_read_forward(struct perf_evlist *evlist, int idx)
832 struct perf_mmap *md = &evlist->mmap[idx];
835 * Check messup is required for forward overwritable ring buffer:
836 * memory pointed by md->prev can be overwritten in this case.
837 * No need for read-write ring buffer: kernel stop outputting when
838 * it hit md->prev (perf_mmap__consume()).
840 return perf_mmap__read_forward(md, evlist->overwrite);
843 union perf_event *perf_evlist__mmap_read_backward(struct perf_evlist *evlist, int idx)
845 struct perf_mmap *md = &evlist->mmap[idx];
848 * No need to check messup for backward ring buffer:
849 * We can always read arbitrary long data from a backward
850 * ring buffer unless we forget to pause it before reading.
852 return perf_mmap__read_backward(md);
855 union perf_event *perf_evlist__mmap_read(struct perf_evlist *evlist, int idx)
857 return perf_evlist__mmap_read_forward(evlist, idx);
860 void perf_mmap__read_catchup(struct perf_mmap *md)
864 if (!refcount_read(&md->refcnt))
867 head = perf_mmap__read_head(md);
871 void perf_evlist__mmap_read_catchup(struct perf_evlist *evlist, int idx)
873 perf_mmap__read_catchup(&evlist->mmap[idx]);
876 static bool perf_mmap__empty(struct perf_mmap *md)
878 return perf_mmap__read_head(md) == md->prev && !md->auxtrace_mmap.base;
881 static void perf_mmap__get(struct perf_mmap *map)
883 refcount_inc(&map->refcnt);
886 static void perf_mmap__put(struct perf_mmap *md)
888 BUG_ON(md->base && refcount_read(&md->refcnt) == 0);
890 if (refcount_dec_and_test(&md->refcnt))
891 perf_mmap__munmap(md);
894 void perf_mmap__consume(struct perf_mmap *md, bool overwrite)
899 perf_mmap__write_tail(md, old);
902 if (refcount_read(&md->refcnt) == 1 && perf_mmap__empty(md))
906 void perf_evlist__mmap_consume(struct perf_evlist *evlist, int idx)
908 perf_mmap__consume(&evlist->mmap[idx], evlist->overwrite);
911 int __weak auxtrace_mmap__mmap(struct auxtrace_mmap *mm __maybe_unused,
912 struct auxtrace_mmap_params *mp __maybe_unused,
913 void *userpg __maybe_unused,
914 int fd __maybe_unused)
919 void __weak auxtrace_mmap__munmap(struct auxtrace_mmap *mm __maybe_unused)
923 void __weak auxtrace_mmap_params__init(
924 struct auxtrace_mmap_params *mp __maybe_unused,
925 off_t auxtrace_offset __maybe_unused,
926 unsigned int auxtrace_pages __maybe_unused,
927 bool auxtrace_overwrite __maybe_unused)
931 void __weak auxtrace_mmap_params__set_idx(
932 struct auxtrace_mmap_params *mp __maybe_unused,
933 struct perf_evlist *evlist __maybe_unused,
934 int idx __maybe_unused,
935 bool per_cpu __maybe_unused)
939 static void perf_mmap__munmap(struct perf_mmap *map)
941 if (map->base != NULL) {
942 munmap(map->base, perf_mmap__mmap_len(map));
945 refcount_set(&map->refcnt, 0);
947 auxtrace_mmap__munmap(&map->auxtrace_mmap);
950 static void perf_evlist__munmap_nofree(struct perf_evlist *evlist)
955 for (i = 0; i < evlist->nr_mmaps; i++)
956 perf_mmap__munmap(&evlist->mmap[i]);
958 if (evlist->backward_mmap)
959 for (i = 0; i < evlist->nr_mmaps; i++)
960 perf_mmap__munmap(&evlist->backward_mmap[i]);
963 void perf_evlist__munmap(struct perf_evlist *evlist)
965 perf_evlist__munmap_nofree(evlist);
966 zfree(&evlist->mmap);
967 zfree(&evlist->backward_mmap);
970 static struct perf_mmap *perf_evlist__alloc_mmap(struct perf_evlist *evlist)
973 struct perf_mmap *map;
975 evlist->nr_mmaps = cpu_map__nr(evlist->cpus);
976 if (cpu_map__empty(evlist->cpus))
977 evlist->nr_mmaps = thread_map__nr(evlist->threads);
978 map = zalloc(evlist->nr_mmaps * sizeof(struct perf_mmap));
982 for (i = 0; i < evlist->nr_mmaps; i++) {
985 * When the perf_mmap() call is made we grab one refcount, plus
986 * one extra to let perf_evlist__mmap_consume() get the last
987 * events after all real references (perf_mmap__get()) are
990 * Each PERF_EVENT_IOC_SET_OUTPUT points to this mmap and
991 * thus does perf_mmap__get() on it.
993 refcount_set(&map[i].refcnt, 0);
1001 struct auxtrace_mmap_params auxtrace_mp;
1004 static int perf_mmap__mmap(struct perf_mmap *map,
1005 struct mmap_params *mp, int fd)
1008 * The last one will be done at perf_evlist__mmap_consume(), so that we
1009 * make sure we don't prevent tools from consuming every last event in
1012 * I.e. we can get the POLLHUP meaning that the fd doesn't exist
1013 * anymore, but the last events for it are still in the ring buffer,
1014 * waiting to be consumed.
1016 * Tools can chose to ignore this at their own discretion, but the
1017 * evlist layer can't just drop it when filtering events in
1018 * perf_evlist__filter_pollfd().
1020 refcount_set(&map->refcnt, 2);
1022 map->mask = mp->mask;
1023 map->base = mmap(NULL, perf_mmap__mmap_len(map), mp->prot,
1025 if (map->base == MAP_FAILED) {
1026 pr_debug2("failed to mmap perf event ring buffer, error %d\n",
1033 if (auxtrace_mmap__mmap(&map->auxtrace_mmap,
1034 &mp->auxtrace_mp, map->base, fd))
1041 perf_evlist__should_poll(struct perf_evlist *evlist __maybe_unused,
1042 struct perf_evsel *evsel)
1044 if (evsel->attr.write_backward)
1049 static int perf_evlist__mmap_per_evsel(struct perf_evlist *evlist, int idx,
1050 struct mmap_params *mp, int cpu_idx,
1051 int thread, int *_output, int *_output_backward)
1053 struct perf_evsel *evsel;
1055 int evlist_cpu = cpu_map__cpu(evlist->cpus, cpu_idx);
1057 evlist__for_each_entry(evlist, evsel) {
1058 struct perf_mmap *maps = evlist->mmap;
1059 int *output = _output;
1063 if (evsel->attr.write_backward) {
1064 output = _output_backward;
1065 maps = evlist->backward_mmap;
1068 maps = perf_evlist__alloc_mmap(evlist);
1071 evlist->backward_mmap = maps;
1072 if (evlist->bkw_mmap_state == BKW_MMAP_NOTREADY)
1073 perf_evlist__toggle_bkw_mmap(evlist, BKW_MMAP_RUNNING);
1077 if (evsel->system_wide && thread)
1080 cpu = cpu_map__idx(evsel->cpus, evlist_cpu);
1084 fd = FD(evsel, cpu, thread);
1086 if (*output == -1) {
1089 if (perf_mmap__mmap(&maps[idx], mp, *output) < 0)
1092 if (ioctl(fd, PERF_EVENT_IOC_SET_OUTPUT, *output) != 0)
1095 perf_mmap__get(&maps[idx]);
1098 revent = perf_evlist__should_poll(evlist, evsel) ? POLLIN : 0;
1101 * The system_wide flag causes a selected event to be opened
1102 * always without a pid. Consequently it will never get a
1103 * POLLHUP, but it is used for tracking in combination with
1104 * other events, so it should not need to be polled anyway.
1105 * Therefore don't add it for polling.
1107 if (!evsel->system_wide &&
1108 __perf_evlist__add_pollfd(evlist, fd, &maps[idx], revent) < 0) {
1109 perf_mmap__put(&maps[idx]);
1113 if (evsel->attr.read_format & PERF_FORMAT_ID) {
1114 if (perf_evlist__id_add_fd(evlist, evsel, cpu, thread,
1117 perf_evlist__set_sid_idx(evlist, evsel, idx, cpu,
1125 static int perf_evlist__mmap_per_cpu(struct perf_evlist *evlist,
1126 struct mmap_params *mp)
1129 int nr_cpus = cpu_map__nr(evlist->cpus);
1130 int nr_threads = thread_map__nr(evlist->threads);
1132 pr_debug2("perf event ring buffer mmapped per cpu\n");
1133 for (cpu = 0; cpu < nr_cpus; cpu++) {
1135 int output_backward = -1;
1137 auxtrace_mmap_params__set_idx(&mp->auxtrace_mp, evlist, cpu,
1140 for (thread = 0; thread < nr_threads; thread++) {
1141 if (perf_evlist__mmap_per_evsel(evlist, cpu, mp, cpu,
1142 thread, &output, &output_backward))
1150 perf_evlist__munmap_nofree(evlist);
1154 static int perf_evlist__mmap_per_thread(struct perf_evlist *evlist,
1155 struct mmap_params *mp)
1158 int nr_threads = thread_map__nr(evlist->threads);
1160 pr_debug2("perf event ring buffer mmapped per thread\n");
1161 for (thread = 0; thread < nr_threads; thread++) {
1163 int output_backward = -1;
1165 auxtrace_mmap_params__set_idx(&mp->auxtrace_mp, evlist, thread,
1168 if (perf_evlist__mmap_per_evsel(evlist, thread, mp, 0, thread,
1169 &output, &output_backward))
1176 perf_evlist__munmap_nofree(evlist);
1180 unsigned long perf_event_mlock_kb_in_pages(void)
1182 unsigned long pages;
1185 if (sysctl__read_int("kernel/perf_event_mlock_kb", &max) < 0) {
1187 * Pick a once upon a time good value, i.e. things look
1188 * strange since we can't read a sysctl value, but lets not
1193 max -= (page_size / 1024);
1196 pages = (max * 1024) / page_size;
1197 if (!is_power_of_2(pages))
1198 pages = rounddown_pow_of_two(pages);
1203 size_t perf_evlist__mmap_size(unsigned long pages)
1205 if (pages == UINT_MAX)
1206 pages = perf_event_mlock_kb_in_pages();
1207 else if (!is_power_of_2(pages))
1210 return (pages + 1) * page_size;
1213 static long parse_pages_arg(const char *str, unsigned long min,
1216 unsigned long pages, val;
1217 static struct parse_tag tags[] = {
1218 { .tag = 'B', .mult = 1 },
1219 { .tag = 'K', .mult = 1 << 10 },
1220 { .tag = 'M', .mult = 1 << 20 },
1221 { .tag = 'G', .mult = 1 << 30 },
1228 val = parse_tag_value(str, tags);
1229 if (val != (unsigned long) -1) {
1230 /* we got file size value */
1231 pages = PERF_ALIGN(val, page_size) / page_size;
1233 /* we got pages count value */
1235 pages = strtoul(str, &eptr, 10);
1240 if (pages == 0 && min == 0) {
1241 /* leave number of pages at 0 */
1242 } else if (!is_power_of_2(pages)) {
1245 /* round pages up to next power of 2 */
1246 pages = roundup_pow_of_two(pages);
1250 unit_number__scnprintf(buf, sizeof(buf), pages * page_size);
1251 pr_info("rounding mmap pages size to %s (%lu pages)\n",
1261 int __perf_evlist__parse_mmap_pages(unsigned int *mmap_pages, const char *str)
1263 unsigned long max = UINT_MAX;
1266 if (max > SIZE_MAX / page_size)
1267 max = SIZE_MAX / page_size;
1269 pages = parse_pages_arg(str, 1, max);
1271 pr_err("Invalid argument for --mmap_pages/-m\n");
1275 *mmap_pages = pages;
1279 int perf_evlist__parse_mmap_pages(const struct option *opt, const char *str,
1280 int unset __maybe_unused)
1282 return __perf_evlist__parse_mmap_pages(opt->value, str);
1286 * perf_evlist__mmap_ex - Create mmaps to receive events.
1287 * @evlist: list of events
1288 * @pages: map length in pages
1289 * @overwrite: overwrite older events?
1290 * @auxtrace_pages - auxtrace map length in pages
1291 * @auxtrace_overwrite - overwrite older auxtrace data?
1293 * If @overwrite is %false the user needs to signal event consumption using
1294 * perf_mmap__write_tail(). Using perf_evlist__mmap_read() does this
1297 * Similarly, if @auxtrace_overwrite is %false the user needs to signal data
1298 * consumption using auxtrace_mmap__write_tail().
1300 * Return: %0 on success, negative error code otherwise.
1302 int perf_evlist__mmap_ex(struct perf_evlist *evlist, unsigned int pages,
1303 bool overwrite, unsigned int auxtrace_pages,
1304 bool auxtrace_overwrite)
1306 struct perf_evsel *evsel;
1307 const struct cpu_map *cpus = evlist->cpus;
1308 const struct thread_map *threads = evlist->threads;
1309 struct mmap_params mp = {
1310 .prot = PROT_READ | (overwrite ? 0 : PROT_WRITE),
1314 evlist->mmap = perf_evlist__alloc_mmap(evlist);
1318 if (evlist->pollfd.entries == NULL && perf_evlist__alloc_pollfd(evlist) < 0)
1321 evlist->overwrite = overwrite;
1322 evlist->mmap_len = perf_evlist__mmap_size(pages);
1323 pr_debug("mmap size %zuB\n", evlist->mmap_len);
1324 mp.mask = evlist->mmap_len - page_size - 1;
1326 auxtrace_mmap_params__init(&mp.auxtrace_mp, evlist->mmap_len,
1327 auxtrace_pages, auxtrace_overwrite);
1329 evlist__for_each_entry(evlist, evsel) {
1330 if ((evsel->attr.read_format & PERF_FORMAT_ID) &&
1331 evsel->sample_id == NULL &&
1332 perf_evsel__alloc_id(evsel, cpu_map__nr(cpus), threads->nr) < 0)
1336 if (cpu_map__empty(cpus))
1337 return perf_evlist__mmap_per_thread(evlist, &mp);
1339 return perf_evlist__mmap_per_cpu(evlist, &mp);
1342 int perf_evlist__mmap(struct perf_evlist *evlist, unsigned int pages,
1345 return perf_evlist__mmap_ex(evlist, pages, overwrite, 0, false);
1348 int perf_evlist__create_maps(struct perf_evlist *evlist, struct target *target)
1350 struct cpu_map *cpus;
1351 struct thread_map *threads;
1353 threads = thread_map__new_str(target->pid, target->tid, target->uid);
1358 if (target__uses_dummy_map(target))
1359 cpus = cpu_map__dummy_new();
1361 cpus = cpu_map__new(target->cpu_list);
1364 goto out_delete_threads;
1366 evlist->has_user_cpus = !!target->cpu_list;
1368 perf_evlist__set_maps(evlist, cpus, threads);
1373 thread_map__put(threads);
1377 void perf_evlist__set_maps(struct perf_evlist *evlist, struct cpu_map *cpus,
1378 struct thread_map *threads)
1381 * Allow for the possibility that one or another of the maps isn't being
1382 * changed i.e. don't put it. Note we are assuming the maps that are
1383 * being applied are brand new and evlist is taking ownership of the
1384 * original reference count of 1. If that is not the case it is up to
1385 * the caller to increase the reference count.
1387 if (cpus != evlist->cpus) {
1388 cpu_map__put(evlist->cpus);
1389 evlist->cpus = cpu_map__get(cpus);
1392 if (threads != evlist->threads) {
1393 thread_map__put(evlist->threads);
1394 evlist->threads = thread_map__get(threads);
1397 perf_evlist__propagate_maps(evlist);
1400 void __perf_evlist__set_sample_bit(struct perf_evlist *evlist,
1401 enum perf_event_sample_format bit)
1403 struct perf_evsel *evsel;
1405 evlist__for_each_entry(evlist, evsel)
1406 __perf_evsel__set_sample_bit(evsel, bit);
1409 void __perf_evlist__reset_sample_bit(struct perf_evlist *evlist,
1410 enum perf_event_sample_format bit)
1412 struct perf_evsel *evsel;
1414 evlist__for_each_entry(evlist, evsel)
1415 __perf_evsel__reset_sample_bit(evsel, bit);
1418 int perf_evlist__apply_filters(struct perf_evlist *evlist, struct perf_evsel **err_evsel)
1420 struct perf_evsel *evsel;
1422 const int ncpus = cpu_map__nr(evlist->cpus),
1423 nthreads = thread_map__nr(evlist->threads);
1425 evlist__for_each_entry(evlist, evsel) {
1426 if (evsel->filter == NULL)
1430 * filters only work for tracepoint event, which doesn't have cpu limit.
1431 * So evlist and evsel should always be same.
1433 err = perf_evsel__apply_filter(evsel, ncpus, nthreads, evsel->filter);
1443 int perf_evlist__set_filter(struct perf_evlist *evlist, const char *filter)
1445 struct perf_evsel *evsel;
1448 evlist__for_each_entry(evlist, evsel) {
1449 if (evsel->attr.type != PERF_TYPE_TRACEPOINT)
1452 err = perf_evsel__set_filter(evsel, filter);
1460 int perf_evlist__set_filter_pids(struct perf_evlist *evlist, size_t npids, pid_t *pids)
1466 for (i = 0; i < npids; ++i) {
1468 if (asprintf(&filter, "common_pid != %d", pids[i]) < 0)
1473 if (asprintf(&tmp, "%s && common_pid != %d", filter, pids[i]) < 0)
1481 ret = perf_evlist__set_filter(evlist, filter);
1487 int perf_evlist__set_filter_pid(struct perf_evlist *evlist, pid_t pid)
1489 return perf_evlist__set_filter_pids(evlist, 1, &pid);
1492 bool perf_evlist__valid_sample_type(struct perf_evlist *evlist)
1494 struct perf_evsel *pos;
1496 if (evlist->nr_entries == 1)
1499 if (evlist->id_pos < 0 || evlist->is_pos < 0)
1502 evlist__for_each_entry(evlist, pos) {
1503 if (pos->id_pos != evlist->id_pos ||
1504 pos->is_pos != evlist->is_pos)
1511 u64 __perf_evlist__combined_sample_type(struct perf_evlist *evlist)
1513 struct perf_evsel *evsel;
1515 if (evlist->combined_sample_type)
1516 return evlist->combined_sample_type;
1518 evlist__for_each_entry(evlist, evsel)
1519 evlist->combined_sample_type |= evsel->attr.sample_type;
1521 return evlist->combined_sample_type;
1524 u64 perf_evlist__combined_sample_type(struct perf_evlist *evlist)
1526 evlist->combined_sample_type = 0;
1527 return __perf_evlist__combined_sample_type(evlist);
1530 u64 perf_evlist__combined_branch_type(struct perf_evlist *evlist)
1532 struct perf_evsel *evsel;
1533 u64 branch_type = 0;
1535 evlist__for_each_entry(evlist, evsel)
1536 branch_type |= evsel->attr.branch_sample_type;
1540 bool perf_evlist__valid_read_format(struct perf_evlist *evlist)
1542 struct perf_evsel *first = perf_evlist__first(evlist), *pos = first;
1543 u64 read_format = first->attr.read_format;
1544 u64 sample_type = first->attr.sample_type;
1546 evlist__for_each_entry(evlist, pos) {
1547 if (read_format != pos->attr.read_format)
1551 /* PERF_SAMPLE_READ imples PERF_FORMAT_ID. */
1552 if ((sample_type & PERF_SAMPLE_READ) &&
1553 !(read_format & PERF_FORMAT_ID)) {
1560 u64 perf_evlist__read_format(struct perf_evlist *evlist)
1562 struct perf_evsel *first = perf_evlist__first(evlist);
1563 return first->attr.read_format;
1566 u16 perf_evlist__id_hdr_size(struct perf_evlist *evlist)
1568 struct perf_evsel *first = perf_evlist__first(evlist);
1569 struct perf_sample *data;
1573 if (!first->attr.sample_id_all)
1576 sample_type = first->attr.sample_type;
1578 if (sample_type & PERF_SAMPLE_TID)
1579 size += sizeof(data->tid) * 2;
1581 if (sample_type & PERF_SAMPLE_TIME)
1582 size += sizeof(data->time);
1584 if (sample_type & PERF_SAMPLE_ID)
1585 size += sizeof(data->id);
1587 if (sample_type & PERF_SAMPLE_STREAM_ID)
1588 size += sizeof(data->stream_id);
1590 if (sample_type & PERF_SAMPLE_CPU)
1591 size += sizeof(data->cpu) * 2;
1593 if (sample_type & PERF_SAMPLE_IDENTIFIER)
1594 size += sizeof(data->id);
1599 bool perf_evlist__valid_sample_id_all(struct perf_evlist *evlist)
1601 struct perf_evsel *first = perf_evlist__first(evlist), *pos = first;
1603 evlist__for_each_entry_continue(evlist, pos) {
1604 if (first->attr.sample_id_all != pos->attr.sample_id_all)
1611 bool perf_evlist__sample_id_all(struct perf_evlist *evlist)
1613 struct perf_evsel *first = perf_evlist__first(evlist);
1614 return first->attr.sample_id_all;
1617 void perf_evlist__set_selected(struct perf_evlist *evlist,
1618 struct perf_evsel *evsel)
1620 evlist->selected = evsel;
1623 void perf_evlist__close(struct perf_evlist *evlist)
1625 struct perf_evsel *evsel;
1626 int ncpus = cpu_map__nr(evlist->cpus);
1627 int nthreads = thread_map__nr(evlist->threads);
1629 evlist__for_each_entry_reverse(evlist, evsel) {
1630 int n = evsel->cpus ? evsel->cpus->nr : ncpus;
1631 perf_evsel__close(evsel, n, nthreads);
1635 static int perf_evlist__create_syswide_maps(struct perf_evlist *evlist)
1637 struct cpu_map *cpus;
1638 struct thread_map *threads;
1642 * Try reading /sys/devices/system/cpu/online to get
1645 * FIXME: -ENOMEM is the best we can do here, the cpu_map
1646 * code needs an overhaul to properly forward the
1647 * error, and we may not want to do that fallback to a
1648 * default cpu identity map :-\
1650 cpus = cpu_map__new(NULL);
1654 threads = thread_map__new_dummy();
1658 perf_evlist__set_maps(evlist, cpus, threads);
1666 int perf_evlist__open(struct perf_evlist *evlist)
1668 struct perf_evsel *evsel;
1672 * Default: one fd per CPU, all threads, aka systemwide
1673 * as sys_perf_event_open(cpu = -1, thread = -1) is EINVAL
1675 if (evlist->threads == NULL && evlist->cpus == NULL) {
1676 err = perf_evlist__create_syswide_maps(evlist);
1681 perf_evlist__update_id_pos(evlist);
1683 evlist__for_each_entry(evlist, evsel) {
1684 err = perf_evsel__open(evsel, evsel->cpus, evsel->threads);
1691 perf_evlist__close(evlist);
1696 int perf_evlist__prepare_workload(struct perf_evlist *evlist, struct target *target,
1697 const char *argv[], bool pipe_output,
1698 void (*exec_error)(int signo, siginfo_t *info, void *ucontext))
1700 int child_ready_pipe[2], go_pipe[2];
1703 if (pipe(child_ready_pipe) < 0) {
1704 perror("failed to create 'ready' pipe");
1708 if (pipe(go_pipe) < 0) {
1709 perror("failed to create 'go' pipe");
1710 goto out_close_ready_pipe;
1713 evlist->workload.pid = fork();
1714 if (evlist->workload.pid < 0) {
1715 perror("failed to fork");
1716 goto out_close_pipes;
1719 if (!evlist->workload.pid) {
1725 signal(SIGTERM, SIG_DFL);
1727 close(child_ready_pipe[0]);
1729 fcntl(go_pipe[0], F_SETFD, FD_CLOEXEC);
1732 * Tell the parent we're ready to go
1734 close(child_ready_pipe[1]);
1737 * Wait until the parent tells us to go.
1739 ret = read(go_pipe[0], &bf, 1);
1741 * The parent will ask for the execvp() to be performed by
1742 * writing exactly one byte, in workload.cork_fd, usually via
1743 * perf_evlist__start_workload().
1745 * For cancelling the workload without actually running it,
1746 * the parent will just close workload.cork_fd, without writing
1747 * anything, i.e. read will return zero and we just exit()
1752 perror("unable to read pipe");
1756 execvp(argv[0], (char **)argv);
1761 val.sival_int = errno;
1762 if (sigqueue(getppid(), SIGUSR1, val))
1770 struct sigaction act = {
1771 .sa_flags = SA_SIGINFO,
1772 .sa_sigaction = exec_error,
1774 sigaction(SIGUSR1, &act, NULL);
1777 if (target__none(target)) {
1778 if (evlist->threads == NULL) {
1779 fprintf(stderr, "FATAL: evlist->threads need to be set at this point (%s:%d).\n",
1780 __func__, __LINE__);
1781 goto out_close_pipes;
1783 thread_map__set_pid(evlist->threads, 0, evlist->workload.pid);
1786 close(child_ready_pipe[1]);
1789 * wait for child to settle
1791 if (read(child_ready_pipe[0], &bf, 1) == -1) {
1792 perror("unable to read pipe");
1793 goto out_close_pipes;
1796 fcntl(go_pipe[1], F_SETFD, FD_CLOEXEC);
1797 evlist->workload.cork_fd = go_pipe[1];
1798 close(child_ready_pipe[0]);
1804 out_close_ready_pipe:
1805 close(child_ready_pipe[0]);
1806 close(child_ready_pipe[1]);
1810 int perf_evlist__start_workload(struct perf_evlist *evlist)
1812 if (evlist->workload.cork_fd > 0) {
1816 * Remove the cork, let it rip!
1818 ret = write(evlist->workload.cork_fd, &bf, 1);
1820 perror("unable to write to pipe");
1822 close(evlist->workload.cork_fd);
1829 int perf_evlist__parse_sample(struct perf_evlist *evlist, union perf_event *event,
1830 struct perf_sample *sample)
1832 struct perf_evsel *evsel = perf_evlist__event2evsel(evlist, event);
1836 return perf_evsel__parse_sample(evsel, event, sample);
1839 size_t perf_evlist__fprintf(struct perf_evlist *evlist, FILE *fp)
1841 struct perf_evsel *evsel;
1844 evlist__for_each_entry(evlist, evsel) {
1845 printed += fprintf(fp, "%s%s", evsel->idx ? ", " : "",
1846 perf_evsel__name(evsel));
1849 return printed + fprintf(fp, "\n");
1852 int perf_evlist__strerror_open(struct perf_evlist *evlist,
1853 int err, char *buf, size_t size)
1856 char sbuf[STRERR_BUFSIZE], *emsg = str_error_r(err, sbuf, sizeof(sbuf));
1861 printed = scnprintf(buf, size,
1863 "Hint:\tCheck /proc/sys/kernel/perf_event_paranoid setting.", emsg);
1865 value = perf_event_paranoid();
1867 printed += scnprintf(buf + printed, size - printed, "\nHint:\t");
1870 printed += scnprintf(buf + printed, size - printed,
1871 "For your workloads it needs to be <= 1\nHint:\t");
1873 printed += scnprintf(buf + printed, size - printed,
1874 "For system wide tracing it needs to be set to -1.\n");
1876 printed += scnprintf(buf + printed, size - printed,
1877 "Hint:\tTry: 'sudo sh -c \"echo -1 > /proc/sys/kernel/perf_event_paranoid\"'\n"
1878 "Hint:\tThe current value is %d.", value);
1881 struct perf_evsel *first = perf_evlist__first(evlist);
1884 if (sysctl__read_int("kernel/perf_event_max_sample_rate", &max_freq) < 0)
1887 if (first->attr.sample_freq < (u64)max_freq)
1890 printed = scnprintf(buf, size,
1892 "Hint:\tCheck /proc/sys/kernel/perf_event_max_sample_rate.\n"
1893 "Hint:\tThe current value is %d and %" PRIu64 " is being requested.",
1894 emsg, max_freq, first->attr.sample_freq);
1899 scnprintf(buf, size, "%s", emsg);
1906 int perf_evlist__strerror_mmap(struct perf_evlist *evlist, int err, char *buf, size_t size)
1908 char sbuf[STRERR_BUFSIZE], *emsg = str_error_r(err, sbuf, sizeof(sbuf));
1909 int pages_attempted = evlist->mmap_len / 1024, pages_max_per_user, printed = 0;
1913 sysctl__read_int("kernel/perf_event_mlock_kb", &pages_max_per_user);
1914 printed += scnprintf(buf + printed, size - printed,
1916 "Hint:\tCheck /proc/sys/kernel/perf_event_mlock_kb (%d kB) setting.\n"
1917 "Hint:\tTried using %zd kB.\n",
1918 emsg, pages_max_per_user, pages_attempted);
1920 if (pages_attempted >= pages_max_per_user) {
1921 printed += scnprintf(buf + printed, size - printed,
1922 "Hint:\tTry 'sudo sh -c \"echo %d > /proc/sys/kernel/perf_event_mlock_kb\"', or\n",
1923 pages_max_per_user + pages_attempted);
1926 printed += scnprintf(buf + printed, size - printed,
1927 "Hint:\tTry using a smaller -m/--mmap-pages value.");
1930 scnprintf(buf, size, "%s", emsg);
1937 void perf_evlist__to_front(struct perf_evlist *evlist,
1938 struct perf_evsel *move_evsel)
1940 struct perf_evsel *evsel, *n;
1943 if (move_evsel == perf_evlist__first(evlist))
1946 evlist__for_each_entry_safe(evlist, n, evsel) {
1947 if (evsel->leader == move_evsel->leader)
1948 list_move_tail(&evsel->node, &move);
1951 list_splice(&move, &evlist->entries);
1954 void perf_evlist__set_tracking_event(struct perf_evlist *evlist,
1955 struct perf_evsel *tracking_evsel)
1957 struct perf_evsel *evsel;
1959 if (tracking_evsel->tracking)
1962 evlist__for_each_entry(evlist, evsel) {
1963 if (evsel != tracking_evsel)
1964 evsel->tracking = false;
1967 tracking_evsel->tracking = true;
1971 perf_evlist__find_evsel_by_str(struct perf_evlist *evlist,
1974 struct perf_evsel *evsel;
1976 evlist__for_each_entry(evlist, evsel) {
1979 if (strcmp(str, evsel->name) == 0)
1986 void perf_evlist__toggle_bkw_mmap(struct perf_evlist *evlist,
1987 enum bkw_mmap_state state)
1989 enum bkw_mmap_state old_state = evlist->bkw_mmap_state;
1996 if (!evlist->backward_mmap)
1999 switch (old_state) {
2000 case BKW_MMAP_NOTREADY: {
2001 if (state != BKW_MMAP_RUNNING)
2005 case BKW_MMAP_RUNNING: {
2006 if (state != BKW_MMAP_DATA_PENDING)
2011 case BKW_MMAP_DATA_PENDING: {
2012 if (state != BKW_MMAP_EMPTY)
2016 case BKW_MMAP_EMPTY: {
2017 if (state != BKW_MMAP_RUNNING)
2023 WARN_ONCE(1, "Shouldn't get there\n");
2026 evlist->bkw_mmap_state = state;
2030 perf_evlist__pause(evlist);
2033 perf_evlist__resume(evlist);