1 #define _FILE_OFFSET_BITS 64
3 #include <linux/kernel.h>
17 static int perf_session__open(struct perf_session *self, bool force)
19 struct stat input_stat;
21 if (!strcmp(self->filename, "-")) {
23 self->fd = STDIN_FILENO;
25 if (perf_session__read_header(self, self->fd) < 0)
26 pr_err("incompatible file format");
31 self->fd = open(self->filename, O_RDONLY);
35 pr_err("failed to open %s: %s", self->filename, strerror(err));
36 if (err == ENOENT && !strcmp(self->filename, "perf.data"))
37 pr_err(" (try 'perf record' first)");
42 if (fstat(self->fd, &input_stat) < 0)
45 if (!force && input_stat.st_uid && (input_stat.st_uid != geteuid())) {
46 pr_err("file %s not owned by current user or root\n",
51 if (!input_stat.st_size) {
52 pr_info("zero-sized file (%s), nothing to do!\n",
57 if (perf_session__read_header(self, self->fd) < 0) {
58 pr_err("incompatible file format");
62 if (!perf_evlist__valid_sample_type(self->evlist)) {
63 pr_err("non matching sample_type");
67 if (!perf_evlist__valid_sample_id_all(self->evlist)) {
68 pr_err("non matching sample_id_all");
72 self->size = input_stat.st_size;
81 static void perf_session__id_header_size(struct perf_session *session)
83 struct perf_sample *data;
84 u64 sample_type = session->sample_type;
87 if (!session->sample_id_all)
90 if (sample_type & PERF_SAMPLE_TID)
91 size += sizeof(data->tid) * 2;
93 if (sample_type & PERF_SAMPLE_TIME)
94 size += sizeof(data->time);
96 if (sample_type & PERF_SAMPLE_ID)
97 size += sizeof(data->id);
99 if (sample_type & PERF_SAMPLE_STREAM_ID)
100 size += sizeof(data->stream_id);
102 if (sample_type & PERF_SAMPLE_CPU)
103 size += sizeof(data->cpu) * 2;
105 session->id_hdr_size = size;
108 void perf_session__update_sample_type(struct perf_session *self)
110 self->sample_type = perf_evlist__sample_type(self->evlist);
111 self->sample_size = __perf_evsel__sample_size(self->sample_type);
112 self->sample_id_all = perf_evlist__sample_id_all(self->evlist);
113 perf_session__id_header_size(self);
116 int perf_session__create_kernel_maps(struct perf_session *self)
118 int ret = machine__create_kernel_maps(&self->host_machine);
121 ret = machines__create_guest_kernel_maps(&self->machines);
125 static void perf_session__destroy_kernel_maps(struct perf_session *self)
127 machine__destroy_kernel_maps(&self->host_machine);
128 machines__destroy_guest_kernel_maps(&self->machines);
131 struct perf_session *perf_session__new(const char *filename, int mode,
132 bool force, bool repipe,
133 struct perf_event_ops *ops)
135 size_t len = filename ? strlen(filename) + 1 : 0;
136 struct perf_session *self = zalloc(sizeof(*self) + len);
141 memcpy(self->filename, filename, len);
142 self->threads = RB_ROOT;
143 INIT_LIST_HEAD(&self->dead_threads);
144 self->last_match = NULL;
146 * On 64bit we can mmap the data file in one go. No need for tiny mmap
147 * slices. On 32bit we use 32MB.
149 #if BITS_PER_LONG == 64
150 self->mmap_window = ULLONG_MAX;
152 self->mmap_window = 32 * 1024 * 1024ULL;
154 self->machines = RB_ROOT;
155 self->repipe = repipe;
156 INIT_LIST_HEAD(&self->ordered_samples.samples);
157 INIT_LIST_HEAD(&self->ordered_samples.sample_cache);
158 INIT_LIST_HEAD(&self->ordered_samples.to_free);
159 machine__init(&self->host_machine, "", HOST_KERNEL_ID);
161 if (mode == O_RDONLY) {
162 if (perf_session__open(self, force) < 0)
164 perf_session__update_sample_type(self);
165 } else if (mode == O_WRONLY) {
167 * In O_RDONLY mode this will be performed when reading the
168 * kernel MMAP event, in perf_event__process_mmap().
170 if (perf_session__create_kernel_maps(self) < 0)
174 if (ops && ops->ordering_requires_timestamps &&
175 ops->ordered_samples && !self->sample_id_all) {
176 dump_printf("WARNING: No sample_id_all support, falling back to unordered processing\n");
177 ops->ordered_samples = false;
183 perf_session__delete(self);
187 static void perf_session__delete_dead_threads(struct perf_session *self)
189 struct thread *n, *t;
191 list_for_each_entry_safe(t, n, &self->dead_threads, node) {
197 static void perf_session__delete_threads(struct perf_session *self)
199 struct rb_node *nd = rb_first(&self->threads);
202 struct thread *t = rb_entry(nd, struct thread, rb_node);
204 rb_erase(&t->rb_node, &self->threads);
210 void perf_session__delete(struct perf_session *self)
212 perf_session__destroy_kernel_maps(self);
213 perf_session__delete_dead_threads(self);
214 perf_session__delete_threads(self);
215 machine__exit(&self->host_machine);
220 void perf_session__remove_thread(struct perf_session *self, struct thread *th)
222 self->last_match = NULL;
223 rb_erase(&th->rb_node, &self->threads);
225 * We may have references to this thread, for instance in some hist_entry
226 * instances, so just move them to a separate list.
228 list_add_tail(&th->node, &self->dead_threads);
231 static bool symbol__match_parent_regex(struct symbol *sym)
233 if (sym->name && !regexec(&parent_regex, sym->name, 0, NULL, 0))
239 int perf_session__resolve_callchain(struct perf_session *self,
240 struct thread *thread,
241 struct ip_callchain *chain,
242 struct symbol **parent)
244 u8 cpumode = PERF_RECORD_MISC_USER;
248 callchain_cursor_reset(&self->callchain_cursor);
250 for (i = 0; i < chain->nr; i++) {
252 struct addr_location al;
254 if (callchain_param.order == ORDER_CALLEE)
257 ip = chain->ips[chain->nr - i - 1];
259 if (ip >= PERF_CONTEXT_MAX) {
261 case PERF_CONTEXT_HV:
262 cpumode = PERF_RECORD_MISC_HYPERVISOR; break;
263 case PERF_CONTEXT_KERNEL:
264 cpumode = PERF_RECORD_MISC_KERNEL; break;
265 case PERF_CONTEXT_USER:
266 cpumode = PERF_RECORD_MISC_USER; break;
274 thread__find_addr_location(thread, self, cpumode,
275 MAP__FUNCTION, thread->pid, ip, &al, NULL);
276 if (al.sym != NULL) {
277 if (sort__has_parent && !*parent &&
278 symbol__match_parent_regex(al.sym))
280 if (!symbol_conf.use_callchain)
284 err = callchain_cursor_append(&self->callchain_cursor,
293 static int process_event_synth_stub(union perf_event *event __used,
294 struct perf_session *session __used)
296 dump_printf(": unhandled!\n");
300 static int process_event_sample_stub(union perf_event *event __used,
301 struct perf_sample *sample __used,
302 struct perf_evsel *evsel __used,
303 struct perf_session *session __used)
305 dump_printf(": unhandled!\n");
309 static int process_event_stub(union perf_event *event __used,
310 struct perf_sample *sample __used,
311 struct perf_session *session __used)
313 dump_printf(": unhandled!\n");
317 static int process_finished_round_stub(union perf_event *event __used,
318 struct perf_session *session __used,
319 struct perf_event_ops *ops __used)
321 dump_printf(": unhandled!\n");
325 static int process_finished_round(union perf_event *event,
326 struct perf_session *session,
327 struct perf_event_ops *ops);
329 static void perf_event_ops__fill_defaults(struct perf_event_ops *handler)
331 if (handler->sample == NULL)
332 handler->sample = process_event_sample_stub;
333 if (handler->mmap == NULL)
334 handler->mmap = process_event_stub;
335 if (handler->comm == NULL)
336 handler->comm = process_event_stub;
337 if (handler->fork == NULL)
338 handler->fork = process_event_stub;
339 if (handler->exit == NULL)
340 handler->exit = process_event_stub;
341 if (handler->lost == NULL)
342 handler->lost = perf_event__process_lost;
343 if (handler->read == NULL)
344 handler->read = process_event_stub;
345 if (handler->throttle == NULL)
346 handler->throttle = process_event_stub;
347 if (handler->unthrottle == NULL)
348 handler->unthrottle = process_event_stub;
349 if (handler->attr == NULL)
350 handler->attr = process_event_synth_stub;
351 if (handler->event_type == NULL)
352 handler->event_type = process_event_synth_stub;
353 if (handler->tracing_data == NULL)
354 handler->tracing_data = process_event_synth_stub;
355 if (handler->build_id == NULL)
356 handler->build_id = process_event_synth_stub;
357 if (handler->finished_round == NULL) {
358 if (handler->ordered_samples)
359 handler->finished_round = process_finished_round;
361 handler->finished_round = process_finished_round_stub;
365 void mem_bswap_64(void *src, int byte_size)
369 while (byte_size > 0) {
371 byte_size -= sizeof(u64);
376 static void perf_event__all64_swap(union perf_event *event)
378 struct perf_event_header *hdr = &event->header;
379 mem_bswap_64(hdr + 1, event->header.size - sizeof(*hdr));
382 static void perf_event__comm_swap(union perf_event *event)
384 event->comm.pid = bswap_32(event->comm.pid);
385 event->comm.tid = bswap_32(event->comm.tid);
388 static void perf_event__mmap_swap(union perf_event *event)
390 event->mmap.pid = bswap_32(event->mmap.pid);
391 event->mmap.tid = bswap_32(event->mmap.tid);
392 event->mmap.start = bswap_64(event->mmap.start);
393 event->mmap.len = bswap_64(event->mmap.len);
394 event->mmap.pgoff = bswap_64(event->mmap.pgoff);
397 static void perf_event__task_swap(union perf_event *event)
399 event->fork.pid = bswap_32(event->fork.pid);
400 event->fork.tid = bswap_32(event->fork.tid);
401 event->fork.ppid = bswap_32(event->fork.ppid);
402 event->fork.ptid = bswap_32(event->fork.ptid);
403 event->fork.time = bswap_64(event->fork.time);
406 static void perf_event__read_swap(union perf_event *event)
408 event->read.pid = bswap_32(event->read.pid);
409 event->read.tid = bswap_32(event->read.tid);
410 event->read.value = bswap_64(event->read.value);
411 event->read.time_enabled = bswap_64(event->read.time_enabled);
412 event->read.time_running = bswap_64(event->read.time_running);
413 event->read.id = bswap_64(event->read.id);
416 /* exported for swapping attributes in file header */
417 void perf_event__attr_swap(struct perf_event_attr *attr)
419 attr->type = bswap_32(attr->type);
420 attr->size = bswap_32(attr->size);
421 attr->config = bswap_64(attr->config);
422 attr->sample_period = bswap_64(attr->sample_period);
423 attr->sample_type = bswap_64(attr->sample_type);
424 attr->read_format = bswap_64(attr->read_format);
425 attr->wakeup_events = bswap_32(attr->wakeup_events);
426 attr->bp_type = bswap_32(attr->bp_type);
427 attr->bp_addr = bswap_64(attr->bp_addr);
428 attr->bp_len = bswap_64(attr->bp_len);
431 static void perf_event__hdr_attr_swap(union perf_event *event)
435 perf_event__attr_swap(&event->attr.attr);
437 size = event->header.size;
438 size -= (void *)&event->attr.id - (void *)event;
439 mem_bswap_64(event->attr.id, size);
442 static void perf_event__event_type_swap(union perf_event *event)
444 event->event_type.event_type.event_id =
445 bswap_64(event->event_type.event_type.event_id);
448 static void perf_event__tracing_data_swap(union perf_event *event)
450 event->tracing_data.size = bswap_32(event->tracing_data.size);
453 typedef void (*perf_event__swap_op)(union perf_event *event);
455 static perf_event__swap_op perf_event__swap_ops[] = {
456 [PERF_RECORD_MMAP] = perf_event__mmap_swap,
457 [PERF_RECORD_COMM] = perf_event__comm_swap,
458 [PERF_RECORD_FORK] = perf_event__task_swap,
459 [PERF_RECORD_EXIT] = perf_event__task_swap,
460 [PERF_RECORD_LOST] = perf_event__all64_swap,
461 [PERF_RECORD_READ] = perf_event__read_swap,
462 [PERF_RECORD_SAMPLE] = perf_event__all64_swap,
463 [PERF_RECORD_HEADER_ATTR] = perf_event__hdr_attr_swap,
464 [PERF_RECORD_HEADER_EVENT_TYPE] = perf_event__event_type_swap,
465 [PERF_RECORD_HEADER_TRACING_DATA] = perf_event__tracing_data_swap,
466 [PERF_RECORD_HEADER_BUILD_ID] = NULL,
467 [PERF_RECORD_HEADER_MAX] = NULL,
470 struct sample_queue {
473 union perf_event *event;
474 struct list_head list;
477 static void perf_session_free_sample_buffers(struct perf_session *session)
479 struct ordered_samples *os = &session->ordered_samples;
481 while (!list_empty(&os->to_free)) {
482 struct sample_queue *sq;
484 sq = list_entry(os->to_free.next, struct sample_queue, list);
490 static int perf_session_deliver_event(struct perf_session *session,
491 union perf_event *event,
492 struct perf_sample *sample,
493 struct perf_event_ops *ops,
496 static void flush_sample_queue(struct perf_session *s,
497 struct perf_event_ops *ops)
499 struct ordered_samples *os = &s->ordered_samples;
500 struct list_head *head = &os->samples;
501 struct sample_queue *tmp, *iter;
502 struct perf_sample sample;
503 u64 limit = os->next_flush;
504 u64 last_ts = os->last_sample ? os->last_sample->timestamp : 0ULL;
507 if (!ops->ordered_samples || !limit)
510 list_for_each_entry_safe(iter, tmp, head, list) {
511 if (iter->timestamp > limit)
514 ret = perf_session__parse_sample(s, iter->event, &sample);
516 pr_err("Can't parse sample, err = %d\n", ret);
518 perf_session_deliver_event(s, iter->event, &sample, ops,
521 os->last_flush = iter->timestamp;
522 list_del(&iter->list);
523 list_add(&iter->list, &os->sample_cache);
526 if (list_empty(head)) {
527 os->last_sample = NULL;
528 } else if (last_ts <= limit) {
530 list_entry(head->prev, struct sample_queue, list);
535 * When perf record finishes a pass on every buffers, it records this pseudo
537 * We record the max timestamp t found in the pass n.
538 * Assuming these timestamps are monotonic across cpus, we know that if
539 * a buffer still has events with timestamps below t, they will be all
540 * available and then read in the pass n + 1.
541 * Hence when we start to read the pass n + 2, we can safely flush every
542 * events with timestamps below t.
544 * ============ PASS n =================
547 * cnt1 timestamps | cnt2 timestamps
550 * - | 4 <--- max recorded
552 * ============ PASS n + 1 ==============
555 * cnt1 timestamps | cnt2 timestamps
558 * 5 | 7 <---- max recorded
560 * Flush every events below timestamp 4
562 * ============ PASS n + 2 ==============
565 * cnt1 timestamps | cnt2 timestamps
570 * Flush every events below timestamp 7
573 static int process_finished_round(union perf_event *event __used,
574 struct perf_session *session,
575 struct perf_event_ops *ops)
577 flush_sample_queue(session, ops);
578 session->ordered_samples.next_flush = session->ordered_samples.max_timestamp;
583 /* The queue is ordered by time */
584 static void __queue_event(struct sample_queue *new, struct perf_session *s)
586 struct ordered_samples *os = &s->ordered_samples;
587 struct sample_queue *sample = os->last_sample;
588 u64 timestamp = new->timestamp;
591 os->last_sample = new;
594 list_add(&new->list, &os->samples);
595 os->max_timestamp = timestamp;
600 * last_sample might point to some random place in the list as it's
601 * the last queued event. We expect that the new event is close to
604 if (sample->timestamp <= timestamp) {
605 while (sample->timestamp <= timestamp) {
606 p = sample->list.next;
607 if (p == &os->samples) {
608 list_add_tail(&new->list, &os->samples);
609 os->max_timestamp = timestamp;
612 sample = list_entry(p, struct sample_queue, list);
614 list_add_tail(&new->list, &sample->list);
616 while (sample->timestamp > timestamp) {
617 p = sample->list.prev;
618 if (p == &os->samples) {
619 list_add(&new->list, &os->samples);
622 sample = list_entry(p, struct sample_queue, list);
624 list_add(&new->list, &sample->list);
628 #define MAX_SAMPLE_BUFFER (64 * 1024 / sizeof(struct sample_queue))
630 static int perf_session_queue_event(struct perf_session *s, union perf_event *event,
631 struct perf_sample *sample, u64 file_offset)
633 struct ordered_samples *os = &s->ordered_samples;
634 struct list_head *sc = &os->sample_cache;
635 u64 timestamp = sample->time;
636 struct sample_queue *new;
638 if (!timestamp || timestamp == ~0ULL)
641 if (timestamp < s->ordered_samples.last_flush) {
642 printf("Warning: Timestamp below last timeslice flush\n");
646 if (!list_empty(sc)) {
647 new = list_entry(sc->next, struct sample_queue, list);
648 list_del(&new->list);
649 } else if (os->sample_buffer) {
650 new = os->sample_buffer + os->sample_buffer_idx;
651 if (++os->sample_buffer_idx == MAX_SAMPLE_BUFFER)
652 os->sample_buffer = NULL;
654 os->sample_buffer = malloc(MAX_SAMPLE_BUFFER * sizeof(*new));
655 if (!os->sample_buffer)
657 list_add(&os->sample_buffer->list, &os->to_free);
658 os->sample_buffer_idx = 2;
659 new = os->sample_buffer + 1;
662 new->timestamp = timestamp;
663 new->file_offset = file_offset;
666 __queue_event(new, s);
671 static void callchain__printf(struct perf_sample *sample)
675 printf("... chain: nr:%" PRIu64 "\n", sample->callchain->nr);
677 for (i = 0; i < sample->callchain->nr; i++)
678 printf("..... %2d: %016" PRIx64 "\n",
679 i, sample->callchain->ips[i]);
682 static void perf_session__print_tstamp(struct perf_session *session,
683 union perf_event *event,
684 struct perf_sample *sample)
686 if (event->header.type != PERF_RECORD_SAMPLE &&
687 !session->sample_id_all) {
688 fputs("-1 -1 ", stdout);
692 if ((session->sample_type & PERF_SAMPLE_CPU))
693 printf("%u ", sample->cpu);
695 if (session->sample_type & PERF_SAMPLE_TIME)
696 printf("%" PRIu64 " ", sample->time);
699 static void dump_event(struct perf_session *session, union perf_event *event,
700 u64 file_offset, struct perf_sample *sample)
705 printf("\n%#" PRIx64 " [%#x]: event: %d\n",
706 file_offset, event->header.size, event->header.type);
711 perf_session__print_tstamp(session, event, sample);
713 printf("%#" PRIx64 " [%#x]: PERF_RECORD_%s", file_offset,
714 event->header.size, perf_event__name(event->header.type));
717 static void dump_sample(struct perf_session *session, union perf_event *event,
718 struct perf_sample *sample)
723 printf("(IP, %d): %d/%d: %#" PRIx64 " period: %" PRIu64 " addr: %#" PRIx64 "\n",
724 event->header.misc, sample->pid, sample->tid, sample->ip,
725 sample->period, sample->addr);
727 if (session->sample_type & PERF_SAMPLE_CALLCHAIN)
728 callchain__printf(sample);
731 static int perf_session_deliver_event(struct perf_session *session,
732 union perf_event *event,
733 struct perf_sample *sample,
734 struct perf_event_ops *ops,
737 struct perf_evsel *evsel;
739 dump_event(session, event, file_offset, sample);
741 evsel = perf_evlist__id2evsel(session->evlist, sample->id);
742 if (evsel != NULL && event->header.type != PERF_RECORD_SAMPLE) {
744 * XXX We're leaving PERF_RECORD_SAMPLE unnacounted here
745 * because the tools right now may apply filters, discarding
746 * some of the samples. For consistency, in the future we
747 * should have something like nr_filtered_samples and remove
748 * the sample->period from total_sample_period, etc, KISS for
751 * Also testing against NULL allows us to handle files without
752 * attr.sample_id_all and/or without PERF_SAMPLE_ID. In the
753 * future probably it'll be a good idea to restrict event
754 * processing via perf_session to files with both set.
756 hists__inc_nr_events(&evsel->hists, event->header.type);
759 switch (event->header.type) {
760 case PERF_RECORD_SAMPLE:
761 dump_sample(session, event, sample);
763 ++session->hists.stats.nr_unknown_id;
766 return ops->sample(event, sample, evsel, session);
767 case PERF_RECORD_MMAP:
768 return ops->mmap(event, sample, session);
769 case PERF_RECORD_COMM:
770 return ops->comm(event, sample, session);
771 case PERF_RECORD_FORK:
772 return ops->fork(event, sample, session);
773 case PERF_RECORD_EXIT:
774 return ops->exit(event, sample, session);
775 case PERF_RECORD_LOST:
776 return ops->lost(event, sample, session);
777 case PERF_RECORD_READ:
778 return ops->read(event, sample, session);
779 case PERF_RECORD_THROTTLE:
780 return ops->throttle(event, sample, session);
781 case PERF_RECORD_UNTHROTTLE:
782 return ops->unthrottle(event, sample, session);
784 ++session->hists.stats.nr_unknown_events;
789 static int perf_session__preprocess_sample(struct perf_session *session,
790 union perf_event *event, struct perf_sample *sample)
792 if (event->header.type != PERF_RECORD_SAMPLE ||
793 !(session->sample_type & PERF_SAMPLE_CALLCHAIN))
796 if (!ip_callchain__valid(sample->callchain, event)) {
797 pr_debug("call-chain problem with event, skipping it.\n");
798 ++session->hists.stats.nr_invalid_chains;
799 session->hists.stats.total_invalid_chains += sample->period;
805 static int perf_session__process_user_event(struct perf_session *session, union perf_event *event,
806 struct perf_event_ops *ops, u64 file_offset)
808 dump_event(session, event, file_offset, NULL);
810 /* These events are processed right away */
811 switch (event->header.type) {
812 case PERF_RECORD_HEADER_ATTR:
813 return ops->attr(event, session);
814 case PERF_RECORD_HEADER_EVENT_TYPE:
815 return ops->event_type(event, session);
816 case PERF_RECORD_HEADER_TRACING_DATA:
817 /* setup for reading amidst mmap */
818 lseek(session->fd, file_offset, SEEK_SET);
819 return ops->tracing_data(event, session);
820 case PERF_RECORD_HEADER_BUILD_ID:
821 return ops->build_id(event, session);
822 case PERF_RECORD_FINISHED_ROUND:
823 return ops->finished_round(event, session, ops);
829 static int perf_session__process_event(struct perf_session *session,
830 union perf_event *event,
831 struct perf_event_ops *ops,
834 struct perf_sample sample;
837 if (session->header.needs_swap &&
838 perf_event__swap_ops[event->header.type])
839 perf_event__swap_ops[event->header.type](event);
841 if (event->header.type >= PERF_RECORD_HEADER_MAX)
844 hists__inc_nr_events(&session->hists, event->header.type);
846 if (event->header.type >= PERF_RECORD_USER_TYPE_START)
847 return perf_session__process_user_event(session, event, ops, file_offset);
850 * For all kernel events we get the sample data
852 ret = perf_session__parse_sample(session, event, &sample);
856 /* Preprocess sample records - precheck callchains */
857 if (perf_session__preprocess_sample(session, event, &sample))
860 if (ops->ordered_samples) {
861 ret = perf_session_queue_event(session, event, &sample,
867 return perf_session_deliver_event(session, event, &sample, ops,
871 void perf_event_header__bswap(struct perf_event_header *self)
873 self->type = bswap_32(self->type);
874 self->misc = bswap_16(self->misc);
875 self->size = bswap_16(self->size);
878 static struct thread *perf_session__register_idle_thread(struct perf_session *self)
880 struct thread *thread = perf_session__findnew(self, 0);
882 if (thread == NULL || thread__set_comm(thread, "swapper")) {
883 pr_err("problem inserting idle task.\n");
890 static void perf_session__warn_about_errors(const struct perf_session *session,
891 const struct perf_event_ops *ops)
893 if (ops->lost == perf_event__process_lost &&
894 session->hists.stats.nr_events[PERF_RECORD_LOST] != 0) {
895 ui__warning("Processed %d events and lost %d chunks!\n\n"
896 "Check IO/CPU overload!\n\n",
897 session->hists.stats.nr_events[0],
898 session->hists.stats.nr_events[PERF_RECORD_LOST]);
901 if (session->hists.stats.nr_unknown_events != 0) {
902 ui__warning("Found %u unknown events!\n\n"
903 "Is this an older tool processing a perf.data "
904 "file generated by a more recent tool?\n\n"
905 "If that is not the case, consider "
906 "reporting to linux-kernel@vger.kernel.org.\n\n",
907 session->hists.stats.nr_unknown_events);
910 if (session->hists.stats.nr_unknown_id != 0) {
911 ui__warning("%u samples with id not present in the header\n",
912 session->hists.stats.nr_unknown_id);
915 if (session->hists.stats.nr_invalid_chains != 0) {
916 ui__warning("Found invalid callchains!\n\n"
917 "%u out of %u events were discarded for this reason.\n\n"
918 "Consider reporting to linux-kernel@vger.kernel.org.\n\n",
919 session->hists.stats.nr_invalid_chains,
920 session->hists.stats.nr_events[PERF_RECORD_SAMPLE]);
924 #define session_done() (*(volatile int *)(&session_done))
925 volatile int session_done;
927 static int __perf_session__process_pipe_events(struct perf_session *self,
928 struct perf_event_ops *ops)
930 union perf_event event;
937 perf_event_ops__fill_defaults(ops);
941 err = readn(self->fd, &event, sizeof(struct perf_event_header));
946 pr_err("failed to read event header\n");
950 if (self->header.needs_swap)
951 perf_event_header__bswap(&event.header);
953 size = event.header.size;
958 p += sizeof(struct perf_event_header);
960 if (size - sizeof(struct perf_event_header)) {
961 err = readn(self->fd, p, size - sizeof(struct perf_event_header));
964 pr_err("unexpected end of event stream\n");
968 pr_err("failed to read event data\n");
974 (skip = perf_session__process_event(self, &event, ops, head)) < 0) {
975 dump_printf("%#" PRIx64 " [%#x]: skipping unknown header type: %d\n",
976 head, event.header.size, event.header.type);
978 * assume we lost track of the stream, check alignment, and
979 * increment a single u64 in the hope to catch on again 'soon'.
981 if (unlikely(head & 7))
997 perf_session__warn_about_errors(self, ops);
998 perf_session_free_sample_buffers(self);
1002 static union perf_event *
1003 fetch_mmaped_event(struct perf_session *session,
1004 u64 head, size_t mmap_size, char *buf)
1006 union perf_event *event;
1009 * Ensure we have enough space remaining to read
1010 * the size of the event in the headers.
1012 if (head + sizeof(event->header) > mmap_size)
1015 event = (union perf_event *)(buf + head);
1017 if (session->header.needs_swap)
1018 perf_event_header__bswap(&event->header);
1020 if (head + event->header.size > mmap_size)
1026 int __perf_session__process_events(struct perf_session *session,
1027 u64 data_offset, u64 data_size,
1028 u64 file_size, struct perf_event_ops *ops)
1030 u64 head, page_offset, file_offset, file_pos, progress_next;
1031 int err, mmap_prot, mmap_flags, map_idx = 0;
1032 size_t page_size, mmap_size;
1033 char *buf, *mmaps[8];
1034 union perf_event *event;
1037 perf_event_ops__fill_defaults(ops);
1039 page_size = sysconf(_SC_PAGESIZE);
1041 page_offset = page_size * (data_offset / page_size);
1042 file_offset = page_offset;
1043 head = data_offset - page_offset;
1045 if (data_offset + data_size < file_size)
1046 file_size = data_offset + data_size;
1048 progress_next = file_size / 16;
1050 mmap_size = session->mmap_window;
1051 if (mmap_size > file_size)
1052 mmap_size = file_size;
1054 memset(mmaps, 0, sizeof(mmaps));
1056 mmap_prot = PROT_READ;
1057 mmap_flags = MAP_SHARED;
1059 if (session->header.needs_swap) {
1060 mmap_prot |= PROT_WRITE;
1061 mmap_flags = MAP_PRIVATE;
1064 buf = mmap(NULL, mmap_size, mmap_prot, mmap_flags, session->fd,
1066 if (buf == MAP_FAILED) {
1067 pr_err("failed to mmap file\n");
1071 mmaps[map_idx] = buf;
1072 map_idx = (map_idx + 1) & (ARRAY_SIZE(mmaps) - 1);
1073 file_pos = file_offset + head;
1076 event = fetch_mmaped_event(session, head, mmap_size, buf);
1078 if (mmaps[map_idx]) {
1079 munmap(mmaps[map_idx], mmap_size);
1080 mmaps[map_idx] = NULL;
1083 page_offset = page_size * (head / page_size);
1084 file_offset += page_offset;
1085 head -= page_offset;
1089 size = event->header.size;
1092 perf_session__process_event(session, event, ops, file_pos) < 0) {
1093 dump_printf("%#" PRIx64 " [%#x]: skipping unknown header type: %d\n",
1094 file_offset + head, event->header.size,
1095 event->header.type);
1097 * assume we lost track of the stream, check alignment, and
1098 * increment a single u64 in the hope to catch on again 'soon'.
1100 if (unlikely(head & 7))
1109 if (file_pos >= progress_next) {
1110 progress_next += file_size / 16;
1111 ui_progress__update(file_pos, file_size,
1112 "Processing events...");
1115 if (file_pos < file_size)
1119 /* do the final flush for ordered samples */
1120 session->ordered_samples.next_flush = ULLONG_MAX;
1121 flush_sample_queue(session, ops);
1123 perf_session__warn_about_errors(session, ops);
1124 perf_session_free_sample_buffers(session);
1128 int perf_session__process_events(struct perf_session *self,
1129 struct perf_event_ops *ops)
1133 if (perf_session__register_idle_thread(self) == NULL)
1137 err = __perf_session__process_events(self,
1138 self->header.data_offset,
1139 self->header.data_size,
1142 err = __perf_session__process_pipe_events(self, ops);
1147 bool perf_session__has_traces(struct perf_session *self, const char *msg)
1149 if (!(self->sample_type & PERF_SAMPLE_RAW)) {
1150 pr_err("No trace sample to read. Did you call 'perf %s'?\n", msg);
1157 int perf_session__set_kallsyms_ref_reloc_sym(struct map **maps,
1158 const char *symbol_name,
1163 struct ref_reloc_sym *ref;
1165 ref = zalloc(sizeof(struct ref_reloc_sym));
1169 ref->name = strdup(symbol_name);
1170 if (ref->name == NULL) {
1175 bracket = strchr(ref->name, ']');
1181 for (i = 0; i < MAP__NR_TYPES; ++i) {
1182 struct kmap *kmap = map__kmap(maps[i]);
1183 kmap->ref_reloc_sym = ref;
1189 size_t perf_session__fprintf_dsos(struct perf_session *self, FILE *fp)
1191 return __dsos__fprintf(&self->host_machine.kernel_dsos, fp) +
1192 __dsos__fprintf(&self->host_machine.user_dsos, fp) +
1193 machines__fprintf_dsos(&self->machines, fp);
1196 size_t perf_session__fprintf_dsos_buildid(struct perf_session *self, FILE *fp,
1199 size_t ret = machine__fprintf_dsos_buildid(&self->host_machine, fp, with_hits);
1200 return ret + machines__fprintf_dsos_buildid(&self->machines, fp, with_hits);
1203 size_t perf_session__fprintf_nr_events(struct perf_session *session, FILE *fp)
1205 struct perf_evsel *pos;
1206 size_t ret = fprintf(fp, "Aggregated stats:\n");
1208 ret += hists__fprintf_nr_events(&session->hists, fp);
1210 list_for_each_entry(pos, &session->evlist->entries, node) {
1211 ret += fprintf(fp, "%s stats:\n", event_name(pos));
1212 ret += hists__fprintf_nr_events(&pos->hists, fp);
1218 struct perf_evsel *perf_session__find_first_evtype(struct perf_session *session,
1221 struct perf_evsel *pos;
1223 list_for_each_entry(pos, &session->evlist->entries, node) {
1224 if (pos->attr.type == type)
1230 void perf_session__print_ip(union perf_event *event,
1231 struct perf_sample *sample,
1232 struct perf_session *session,
1233 int print_sym, int print_dso)
1235 struct addr_location al;
1236 const char *symname, *dsoname;
1237 struct callchain_cursor *cursor = &session->callchain_cursor;
1238 struct callchain_cursor_node *node;
1240 if (perf_event__preprocess_sample(event, session, &al, sample,
1242 error("problem processing %d event, skipping it.\n",
1243 event->header.type);
1247 if (symbol_conf.use_callchain && sample->callchain) {
1249 if (perf_session__resolve_callchain(session, al.thread,
1250 sample->callchain, NULL) != 0) {
1252 error("Failed to resolve callchain. Skipping\n");
1255 callchain_cursor_commit(cursor);
1258 node = callchain_cursor_current(cursor);
1262 printf("\t%16" PRIx64, node->ip);
1264 if (node->sym && node->sym->name)
1265 symname = node->sym->name;
1269 printf(" %s", symname);
1272 if (node->map && node->map->dso && node->map->dso->name)
1273 dsoname = node->map->dso->name;
1277 printf(" (%s)", dsoname);
1281 callchain_cursor_advance(cursor);
1285 printf("%16" PRIx64, sample->ip);
1287 if (al.sym && al.sym->name)
1288 symname = al.sym->name;
1292 printf(" %s", symname);
1296 if (al.map && al.map->dso && al.map->dso->name)
1297 dsoname = al.map->dso->name;
1301 printf(" (%s)", dsoname);
1306 int perf_session__cpu_bitmap(struct perf_session *session,
1307 const char *cpu_list, unsigned long *cpu_bitmap)
1310 struct cpu_map *map;
1312 for (i = 0; i < PERF_TYPE_MAX; ++i) {
1313 struct perf_evsel *evsel;
1315 evsel = perf_session__find_first_evtype(session, i);
1319 if (!(evsel->attr.sample_type & PERF_SAMPLE_CPU)) {
1320 pr_err("File does not contain CPU events. "
1321 "Remove -c option to proceed.\n");
1326 map = cpu_map__new(cpu_list);
1328 for (i = 0; i < map->nr; i++) {
1329 int cpu = map->map[i];
1331 if (cpu >= MAX_NR_CPUS) {
1332 pr_err("Requested CPU %d too large. "
1333 "Consider raising MAX_NR_CPUS\n", cpu);
1337 set_bit(cpu, cpu_bitmap);
1343 void perf_session__fprintf_info(struct perf_session *session, FILE *fp,
1349 if (session == NULL || fp == NULL)
1352 ret = fstat(session->fd, &st);
1356 fprintf(fp, "# ========\n");
1357 fprintf(fp, "# captured on: %s", ctime(&st.st_ctime));
1358 perf_header__fprintf_info(session, fp, full);
1359 fprintf(fp, "# ========\n#\n");