1 #define _FILE_OFFSET_BITS 64
3 #include <linux/kernel.h>
16 static int perf_session__open(struct perf_session *self, bool force)
18 struct stat input_stat;
20 if (!strcmp(self->filename, "-")) {
22 self->fd = STDIN_FILENO;
24 if (perf_session__read_header(self, self->fd) < 0)
25 pr_err("incompatible file format");
30 self->fd = open(self->filename, O_RDONLY);
34 pr_err("failed to open %s: %s", self->filename, strerror(err));
35 if (err == ENOENT && !strcmp(self->filename, "perf.data"))
36 pr_err(" (try 'perf record' first)");
41 if (fstat(self->fd, &input_stat) < 0)
44 if (!force && input_stat.st_uid && (input_stat.st_uid != geteuid())) {
45 pr_err("file %s not owned by current user or root\n",
50 if (!input_stat.st_size) {
51 pr_info("zero-sized file (%s), nothing to do!\n",
56 if (perf_session__read_header(self, self->fd) < 0) {
57 pr_err("incompatible file format");
61 self->size = input_stat.st_size;
70 static void perf_session__id_header_size(struct perf_session *session)
72 struct perf_sample *data;
73 u64 sample_type = session->sample_type;
76 if (!session->sample_id_all)
79 if (sample_type & PERF_SAMPLE_TID)
80 size += sizeof(data->tid) * 2;
82 if (sample_type & PERF_SAMPLE_TIME)
83 size += sizeof(data->time);
85 if (sample_type & PERF_SAMPLE_ID)
86 size += sizeof(data->id);
88 if (sample_type & PERF_SAMPLE_STREAM_ID)
89 size += sizeof(data->stream_id);
91 if (sample_type & PERF_SAMPLE_CPU)
92 size += sizeof(data->cpu) * 2;
94 session->id_hdr_size = size;
97 void perf_session__update_sample_type(struct perf_session *self)
99 self->sample_type = perf_evlist__sample_type(self->evlist);
100 self->sample_id_all = perf_evlist__sample_id_all(self->evlist);
101 perf_session__id_header_size(self);
104 int perf_session__create_kernel_maps(struct perf_session *self)
106 int ret = machine__create_kernel_maps(&self->host_machine);
109 ret = machines__create_guest_kernel_maps(&self->machines);
113 static void perf_session__destroy_kernel_maps(struct perf_session *self)
115 machine__destroy_kernel_maps(&self->host_machine);
116 machines__destroy_guest_kernel_maps(&self->machines);
119 struct perf_session *perf_session__new(const char *filename, int mode,
120 bool force, bool repipe,
121 struct perf_event_ops *ops)
123 size_t len = filename ? strlen(filename) + 1 : 0;
124 struct perf_session *self = zalloc(sizeof(*self) + len);
129 memcpy(self->filename, filename, len);
130 self->threads = RB_ROOT;
131 INIT_LIST_HEAD(&self->dead_threads);
132 self->last_match = NULL;
134 * On 64bit we can mmap the data file in one go. No need for tiny mmap
135 * slices. On 32bit we use 32MB.
137 #if BITS_PER_LONG == 64
138 self->mmap_window = ULLONG_MAX;
140 self->mmap_window = 32 * 1024 * 1024ULL;
142 self->machines = RB_ROOT;
143 self->repipe = repipe;
144 INIT_LIST_HEAD(&self->ordered_samples.samples);
145 INIT_LIST_HEAD(&self->ordered_samples.sample_cache);
146 INIT_LIST_HEAD(&self->ordered_samples.to_free);
147 machine__init(&self->host_machine, "", HOST_KERNEL_ID);
149 if (mode == O_RDONLY) {
150 if (perf_session__open(self, force) < 0)
152 perf_session__update_sample_type(self);
153 } else if (mode == O_WRONLY) {
155 * In O_RDONLY mode this will be performed when reading the
156 * kernel MMAP event, in perf_event__process_mmap().
158 if (perf_session__create_kernel_maps(self) < 0)
162 if (ops && ops->ordering_requires_timestamps &&
163 ops->ordered_samples && !self->sample_id_all) {
164 dump_printf("WARNING: No sample_id_all support, falling back to unordered processing\n");
165 ops->ordered_samples = false;
171 perf_session__delete(self);
175 static void perf_session__delete_dead_threads(struct perf_session *self)
177 struct thread *n, *t;
179 list_for_each_entry_safe(t, n, &self->dead_threads, node) {
185 static void perf_session__delete_threads(struct perf_session *self)
187 struct rb_node *nd = rb_first(&self->threads);
190 struct thread *t = rb_entry(nd, struct thread, rb_node);
192 rb_erase(&t->rb_node, &self->threads);
198 void perf_session__delete(struct perf_session *self)
200 perf_session__destroy_kernel_maps(self);
201 perf_session__delete_dead_threads(self);
202 perf_session__delete_threads(self);
203 machine__exit(&self->host_machine);
208 void perf_session__remove_thread(struct perf_session *self, struct thread *th)
210 self->last_match = NULL;
211 rb_erase(&th->rb_node, &self->threads);
213 * We may have references to this thread, for instance in some hist_entry
214 * instances, so just move them to a separate list.
216 list_add_tail(&th->node, &self->dead_threads);
219 static bool symbol__match_parent_regex(struct symbol *sym)
221 if (sym->name && !regexec(&parent_regex, sym->name, 0, NULL, 0))
227 int perf_session__resolve_callchain(struct perf_session *self,
228 struct thread *thread,
229 struct ip_callchain *chain,
230 struct symbol **parent)
232 u8 cpumode = PERF_RECORD_MISC_USER;
236 callchain_cursor_reset(&self->callchain_cursor);
238 for (i = 0; i < chain->nr; i++) {
239 u64 ip = chain->ips[i];
240 struct addr_location al;
242 if (ip >= PERF_CONTEXT_MAX) {
244 case PERF_CONTEXT_HV:
245 cpumode = PERF_RECORD_MISC_HYPERVISOR; break;
246 case PERF_CONTEXT_KERNEL:
247 cpumode = PERF_RECORD_MISC_KERNEL; break;
248 case PERF_CONTEXT_USER:
249 cpumode = PERF_RECORD_MISC_USER; break;
257 thread__find_addr_location(thread, self, cpumode,
258 MAP__FUNCTION, thread->pid, ip, &al, NULL);
259 if (al.sym != NULL) {
260 if (sort__has_parent && !*parent &&
261 symbol__match_parent_regex(al.sym))
263 if (!symbol_conf.use_callchain)
267 err = callchain_cursor_append(&self->callchain_cursor,
276 static int process_event_synth_stub(union perf_event *event __used,
277 struct perf_session *session __used)
279 dump_printf(": unhandled!\n");
283 static int process_event_sample_stub(union perf_event *event __used,
284 struct perf_sample *sample __used,
285 struct perf_evsel *evsel __used,
286 struct perf_session *session __used)
288 dump_printf(": unhandled!\n");
292 static int process_event_stub(union perf_event *event __used,
293 struct perf_sample *sample __used,
294 struct perf_session *session __used)
296 dump_printf(": unhandled!\n");
300 static int process_finished_round_stub(union perf_event *event __used,
301 struct perf_session *session __used,
302 struct perf_event_ops *ops __used)
304 dump_printf(": unhandled!\n");
308 static int process_finished_round(union perf_event *event,
309 struct perf_session *session,
310 struct perf_event_ops *ops);
312 static void perf_event_ops__fill_defaults(struct perf_event_ops *handler)
314 if (handler->sample == NULL)
315 handler->sample = process_event_sample_stub;
316 if (handler->mmap == NULL)
317 handler->mmap = process_event_stub;
318 if (handler->comm == NULL)
319 handler->comm = process_event_stub;
320 if (handler->fork == NULL)
321 handler->fork = process_event_stub;
322 if (handler->exit == NULL)
323 handler->exit = process_event_stub;
324 if (handler->lost == NULL)
325 handler->lost = perf_event__process_lost;
326 if (handler->read == NULL)
327 handler->read = process_event_stub;
328 if (handler->throttle == NULL)
329 handler->throttle = process_event_stub;
330 if (handler->unthrottle == NULL)
331 handler->unthrottle = process_event_stub;
332 if (handler->attr == NULL)
333 handler->attr = process_event_synth_stub;
334 if (handler->event_type == NULL)
335 handler->event_type = process_event_synth_stub;
336 if (handler->tracing_data == NULL)
337 handler->tracing_data = process_event_synth_stub;
338 if (handler->build_id == NULL)
339 handler->build_id = process_event_synth_stub;
340 if (handler->finished_round == NULL) {
341 if (handler->ordered_samples)
342 handler->finished_round = process_finished_round;
344 handler->finished_round = process_finished_round_stub;
348 void mem_bswap_64(void *src, int byte_size)
352 while (byte_size > 0) {
354 byte_size -= sizeof(u64);
359 static void perf_event__all64_swap(union perf_event *event)
361 struct perf_event_header *hdr = &event->header;
362 mem_bswap_64(hdr + 1, event->header.size - sizeof(*hdr));
365 static void perf_event__comm_swap(union perf_event *event)
367 event->comm.pid = bswap_32(event->comm.pid);
368 event->comm.tid = bswap_32(event->comm.tid);
371 static void perf_event__mmap_swap(union perf_event *event)
373 event->mmap.pid = bswap_32(event->mmap.pid);
374 event->mmap.tid = bswap_32(event->mmap.tid);
375 event->mmap.start = bswap_64(event->mmap.start);
376 event->mmap.len = bswap_64(event->mmap.len);
377 event->mmap.pgoff = bswap_64(event->mmap.pgoff);
380 static void perf_event__task_swap(union perf_event *event)
382 event->fork.pid = bswap_32(event->fork.pid);
383 event->fork.tid = bswap_32(event->fork.tid);
384 event->fork.ppid = bswap_32(event->fork.ppid);
385 event->fork.ptid = bswap_32(event->fork.ptid);
386 event->fork.time = bswap_64(event->fork.time);
389 static void perf_event__read_swap(union perf_event *event)
391 event->read.pid = bswap_32(event->read.pid);
392 event->read.tid = bswap_32(event->read.tid);
393 event->read.value = bswap_64(event->read.value);
394 event->read.time_enabled = bswap_64(event->read.time_enabled);
395 event->read.time_running = bswap_64(event->read.time_running);
396 event->read.id = bswap_64(event->read.id);
399 static void perf_event__attr_swap(union perf_event *event)
403 event->attr.attr.type = bswap_32(event->attr.attr.type);
404 event->attr.attr.size = bswap_32(event->attr.attr.size);
405 event->attr.attr.config = bswap_64(event->attr.attr.config);
406 event->attr.attr.sample_period = bswap_64(event->attr.attr.sample_period);
407 event->attr.attr.sample_type = bswap_64(event->attr.attr.sample_type);
408 event->attr.attr.read_format = bswap_64(event->attr.attr.read_format);
409 event->attr.attr.wakeup_events = bswap_32(event->attr.attr.wakeup_events);
410 event->attr.attr.bp_type = bswap_32(event->attr.attr.bp_type);
411 event->attr.attr.bp_addr = bswap_64(event->attr.attr.bp_addr);
412 event->attr.attr.bp_len = bswap_64(event->attr.attr.bp_len);
414 size = event->header.size;
415 size -= (void *)&event->attr.id - (void *)event;
416 mem_bswap_64(event->attr.id, size);
419 static void perf_event__event_type_swap(union perf_event *event)
421 event->event_type.event_type.event_id =
422 bswap_64(event->event_type.event_type.event_id);
425 static void perf_event__tracing_data_swap(union perf_event *event)
427 event->tracing_data.size = bswap_32(event->tracing_data.size);
430 typedef void (*perf_event__swap_op)(union perf_event *event);
432 static perf_event__swap_op perf_event__swap_ops[] = {
433 [PERF_RECORD_MMAP] = perf_event__mmap_swap,
434 [PERF_RECORD_COMM] = perf_event__comm_swap,
435 [PERF_RECORD_FORK] = perf_event__task_swap,
436 [PERF_RECORD_EXIT] = perf_event__task_swap,
437 [PERF_RECORD_LOST] = perf_event__all64_swap,
438 [PERF_RECORD_READ] = perf_event__read_swap,
439 [PERF_RECORD_SAMPLE] = perf_event__all64_swap,
440 [PERF_RECORD_HEADER_ATTR] = perf_event__attr_swap,
441 [PERF_RECORD_HEADER_EVENT_TYPE] = perf_event__event_type_swap,
442 [PERF_RECORD_HEADER_TRACING_DATA] = perf_event__tracing_data_swap,
443 [PERF_RECORD_HEADER_BUILD_ID] = NULL,
444 [PERF_RECORD_HEADER_MAX] = NULL,
447 struct sample_queue {
450 union perf_event *event;
451 struct list_head list;
454 static void perf_session_free_sample_buffers(struct perf_session *session)
456 struct ordered_samples *os = &session->ordered_samples;
458 while (!list_empty(&os->to_free)) {
459 struct sample_queue *sq;
461 sq = list_entry(os->to_free.next, struct sample_queue, list);
467 static int perf_session_deliver_event(struct perf_session *session,
468 union perf_event *event,
469 struct perf_sample *sample,
470 struct perf_event_ops *ops,
473 static void flush_sample_queue(struct perf_session *s,
474 struct perf_event_ops *ops)
476 struct ordered_samples *os = &s->ordered_samples;
477 struct list_head *head = &os->samples;
478 struct sample_queue *tmp, *iter;
479 struct perf_sample sample;
480 u64 limit = os->next_flush;
481 u64 last_ts = os->last_sample ? os->last_sample->timestamp : 0ULL;
483 if (!ops->ordered_samples || !limit)
486 list_for_each_entry_safe(iter, tmp, head, list) {
487 if (iter->timestamp > limit)
490 perf_session__parse_sample(s, iter->event, &sample);
491 perf_session_deliver_event(s, iter->event, &sample, ops,
494 os->last_flush = iter->timestamp;
495 list_del(&iter->list);
496 list_add(&iter->list, &os->sample_cache);
499 if (list_empty(head)) {
500 os->last_sample = NULL;
501 } else if (last_ts <= limit) {
503 list_entry(head->prev, struct sample_queue, list);
508 * When perf record finishes a pass on every buffers, it records this pseudo
510 * We record the max timestamp t found in the pass n.
511 * Assuming these timestamps are monotonic across cpus, we know that if
512 * a buffer still has events with timestamps below t, they will be all
513 * available and then read in the pass n + 1.
514 * Hence when we start to read the pass n + 2, we can safely flush every
515 * events with timestamps below t.
517 * ============ PASS n =================
520 * cnt1 timestamps | cnt2 timestamps
523 * - | 4 <--- max recorded
525 * ============ PASS n + 1 ==============
528 * cnt1 timestamps | cnt2 timestamps
531 * 5 | 7 <---- max recorded
533 * Flush every events below timestamp 4
535 * ============ PASS n + 2 ==============
538 * cnt1 timestamps | cnt2 timestamps
543 * Flush every events below timestamp 7
546 static int process_finished_round(union perf_event *event __used,
547 struct perf_session *session,
548 struct perf_event_ops *ops)
550 flush_sample_queue(session, ops);
551 session->ordered_samples.next_flush = session->ordered_samples.max_timestamp;
556 /* The queue is ordered by time */
557 static void __queue_event(struct sample_queue *new, struct perf_session *s)
559 struct ordered_samples *os = &s->ordered_samples;
560 struct sample_queue *sample = os->last_sample;
561 u64 timestamp = new->timestamp;
564 os->last_sample = new;
567 list_add(&new->list, &os->samples);
568 os->max_timestamp = timestamp;
573 * last_sample might point to some random place in the list as it's
574 * the last queued event. We expect that the new event is close to
577 if (sample->timestamp <= timestamp) {
578 while (sample->timestamp <= timestamp) {
579 p = sample->list.next;
580 if (p == &os->samples) {
581 list_add_tail(&new->list, &os->samples);
582 os->max_timestamp = timestamp;
585 sample = list_entry(p, struct sample_queue, list);
587 list_add_tail(&new->list, &sample->list);
589 while (sample->timestamp > timestamp) {
590 p = sample->list.prev;
591 if (p == &os->samples) {
592 list_add(&new->list, &os->samples);
595 sample = list_entry(p, struct sample_queue, list);
597 list_add(&new->list, &sample->list);
601 #define MAX_SAMPLE_BUFFER (64 * 1024 / sizeof(struct sample_queue))
603 static int perf_session_queue_event(struct perf_session *s, union perf_event *event,
604 struct perf_sample *sample, u64 file_offset)
606 struct ordered_samples *os = &s->ordered_samples;
607 struct list_head *sc = &os->sample_cache;
608 u64 timestamp = sample->time;
609 struct sample_queue *new;
611 if (!timestamp || timestamp == ~0ULL)
614 if (timestamp < s->ordered_samples.last_flush) {
615 printf("Warning: Timestamp below last timeslice flush\n");
619 if (!list_empty(sc)) {
620 new = list_entry(sc->next, struct sample_queue, list);
621 list_del(&new->list);
622 } else if (os->sample_buffer) {
623 new = os->sample_buffer + os->sample_buffer_idx;
624 if (++os->sample_buffer_idx == MAX_SAMPLE_BUFFER)
625 os->sample_buffer = NULL;
627 os->sample_buffer = malloc(MAX_SAMPLE_BUFFER * sizeof(*new));
628 if (!os->sample_buffer)
630 list_add(&os->sample_buffer->list, &os->to_free);
631 os->sample_buffer_idx = 2;
632 new = os->sample_buffer + 1;
635 new->timestamp = timestamp;
636 new->file_offset = file_offset;
639 __queue_event(new, s);
644 static void callchain__printf(struct perf_sample *sample)
648 printf("... chain: nr:%" PRIu64 "\n", sample->callchain->nr);
650 for (i = 0; i < sample->callchain->nr; i++)
651 printf("..... %2d: %016" PRIx64 "\n",
652 i, sample->callchain->ips[i]);
655 static void perf_session__print_tstamp(struct perf_session *session,
656 union perf_event *event,
657 struct perf_sample *sample)
659 if (event->header.type != PERF_RECORD_SAMPLE &&
660 !session->sample_id_all) {
661 fputs("-1 -1 ", stdout);
665 if ((session->sample_type & PERF_SAMPLE_CPU))
666 printf("%u ", sample->cpu);
668 if (session->sample_type & PERF_SAMPLE_TIME)
669 printf("%" PRIu64 " ", sample->time);
672 static void dump_event(struct perf_session *session, union perf_event *event,
673 u64 file_offset, struct perf_sample *sample)
678 printf("\n%#" PRIx64 " [%#x]: event: %d\n",
679 file_offset, event->header.size, event->header.type);
684 perf_session__print_tstamp(session, event, sample);
686 printf("%#" PRIx64 " [%#x]: PERF_RECORD_%s", file_offset,
687 event->header.size, perf_event__name(event->header.type));
690 static void dump_sample(struct perf_session *session, union perf_event *event,
691 struct perf_sample *sample)
696 printf("(IP, %d): %d/%d: %#" PRIx64 " period: %" PRIu64 "\n",
697 event->header.misc, sample->pid, sample->tid, sample->ip,
700 if (session->sample_type & PERF_SAMPLE_CALLCHAIN)
701 callchain__printf(sample);
704 static int perf_session_deliver_event(struct perf_session *session,
705 union perf_event *event,
706 struct perf_sample *sample,
707 struct perf_event_ops *ops,
710 struct perf_evsel *evsel;
712 dump_event(session, event, file_offset, sample);
714 switch (event->header.type) {
715 case PERF_RECORD_SAMPLE:
716 dump_sample(session, event, sample);
717 evsel = perf_evlist__id2evsel(session->evlist, sample->id);
719 ++session->hists.stats.nr_unknown_id;
722 return ops->sample(event, sample, evsel, session);
723 case PERF_RECORD_MMAP:
724 return ops->mmap(event, sample, session);
725 case PERF_RECORD_COMM:
726 return ops->comm(event, sample, session);
727 case PERF_RECORD_FORK:
728 return ops->fork(event, sample, session);
729 case PERF_RECORD_EXIT:
730 return ops->exit(event, sample, session);
731 case PERF_RECORD_LOST:
732 return ops->lost(event, sample, session);
733 case PERF_RECORD_READ:
734 return ops->read(event, sample, session);
735 case PERF_RECORD_THROTTLE:
736 return ops->throttle(event, sample, session);
737 case PERF_RECORD_UNTHROTTLE:
738 return ops->unthrottle(event, sample, session);
740 ++session->hists.stats.nr_unknown_events;
745 static int perf_session__preprocess_sample(struct perf_session *session,
746 union perf_event *event, struct perf_sample *sample)
748 if (event->header.type != PERF_RECORD_SAMPLE ||
749 !(session->sample_type & PERF_SAMPLE_CALLCHAIN))
752 if (!ip_callchain__valid(sample->callchain, event)) {
753 pr_debug("call-chain problem with event, skipping it.\n");
754 ++session->hists.stats.nr_invalid_chains;
755 session->hists.stats.total_invalid_chains += sample->period;
761 static int perf_session__process_user_event(struct perf_session *session, union perf_event *event,
762 struct perf_event_ops *ops, u64 file_offset)
764 dump_event(session, event, file_offset, NULL);
766 /* These events are processed right away */
767 switch (event->header.type) {
768 case PERF_RECORD_HEADER_ATTR:
769 return ops->attr(event, session);
770 case PERF_RECORD_HEADER_EVENT_TYPE:
771 return ops->event_type(event, session);
772 case PERF_RECORD_HEADER_TRACING_DATA:
773 /* setup for reading amidst mmap */
774 lseek(session->fd, file_offset, SEEK_SET);
775 return ops->tracing_data(event, session);
776 case PERF_RECORD_HEADER_BUILD_ID:
777 return ops->build_id(event, session);
778 case PERF_RECORD_FINISHED_ROUND:
779 return ops->finished_round(event, session, ops);
785 static int perf_session__process_event(struct perf_session *session,
786 union perf_event *event,
787 struct perf_event_ops *ops,
790 struct perf_sample sample;
793 if (session->header.needs_swap &&
794 perf_event__swap_ops[event->header.type])
795 perf_event__swap_ops[event->header.type](event);
797 if (event->header.type >= PERF_RECORD_HEADER_MAX)
800 hists__inc_nr_events(&session->hists, event->header.type);
802 if (event->header.type >= PERF_RECORD_USER_TYPE_START)
803 return perf_session__process_user_event(session, event, ops, file_offset);
806 * For all kernel events we get the sample data
808 perf_session__parse_sample(session, event, &sample);
810 /* Preprocess sample records - precheck callchains */
811 if (perf_session__preprocess_sample(session, event, &sample))
814 if (ops->ordered_samples) {
815 ret = perf_session_queue_event(session, event, &sample,
821 return perf_session_deliver_event(session, event, &sample, ops,
825 void perf_event_header__bswap(struct perf_event_header *self)
827 self->type = bswap_32(self->type);
828 self->misc = bswap_16(self->misc);
829 self->size = bswap_16(self->size);
832 static struct thread *perf_session__register_idle_thread(struct perf_session *self)
834 struct thread *thread = perf_session__findnew(self, 0);
836 if (thread == NULL || thread__set_comm(thread, "swapper")) {
837 pr_err("problem inserting idle task.\n");
844 static void perf_session__warn_about_errors(const struct perf_session *session,
845 const struct perf_event_ops *ops)
847 if (ops->lost == perf_event__process_lost &&
848 session->hists.stats.total_lost != 0) {
849 ui__warning("Processed %" PRIu64 " events and LOST %" PRIu64
850 "!\n\nCheck IO/CPU overload!\n\n",
851 session->hists.stats.total_period,
852 session->hists.stats.total_lost);
855 if (session->hists.stats.nr_unknown_events != 0) {
856 ui__warning("Found %u unknown events!\n\n"
857 "Is this an older tool processing a perf.data "
858 "file generated by a more recent tool?\n\n"
859 "If that is not the case, consider "
860 "reporting to linux-kernel@vger.kernel.org.\n\n",
861 session->hists.stats.nr_unknown_events);
864 if (session->hists.stats.nr_unknown_id != 0) {
865 ui__warning("%u samples with id not present in the header\n",
866 session->hists.stats.nr_unknown_id);
869 if (session->hists.stats.nr_invalid_chains != 0) {
870 ui__warning("Found invalid callchains!\n\n"
871 "%u out of %u events were discarded for this reason.\n\n"
872 "Consider reporting to linux-kernel@vger.kernel.org.\n\n",
873 session->hists.stats.nr_invalid_chains,
874 session->hists.stats.nr_events[PERF_RECORD_SAMPLE]);
878 #define session_done() (*(volatile int *)(&session_done))
879 volatile int session_done;
881 static int __perf_session__process_pipe_events(struct perf_session *self,
882 struct perf_event_ops *ops)
884 union perf_event event;
891 perf_event_ops__fill_defaults(ops);
895 err = readn(self->fd, &event, sizeof(struct perf_event_header));
900 pr_err("failed to read event header\n");
904 if (self->header.needs_swap)
905 perf_event_header__bswap(&event.header);
907 size = event.header.size;
912 p += sizeof(struct perf_event_header);
914 if (size - sizeof(struct perf_event_header)) {
915 err = readn(self->fd, p, size - sizeof(struct perf_event_header));
918 pr_err("unexpected end of event stream\n");
922 pr_err("failed to read event data\n");
928 (skip = perf_session__process_event(self, &event, ops, head)) < 0) {
929 dump_printf("%#" PRIx64 " [%#x]: skipping unknown header type: %d\n",
930 head, event.header.size, event.header.type);
932 * assume we lost track of the stream, check alignment, and
933 * increment a single u64 in the hope to catch on again 'soon'.
935 if (unlikely(head & 7))
951 perf_session__warn_about_errors(self, ops);
952 perf_session_free_sample_buffers(self);
956 int __perf_session__process_events(struct perf_session *session,
957 u64 data_offset, u64 data_size,
958 u64 file_size, struct perf_event_ops *ops)
960 u64 head, page_offset, file_offset, file_pos, progress_next;
961 int err, mmap_prot, mmap_flags, map_idx = 0;
962 struct ui_progress *progress;
963 size_t page_size, mmap_size;
964 char *buf, *mmaps[8];
965 union perf_event *event;
968 perf_event_ops__fill_defaults(ops);
970 page_size = sysconf(_SC_PAGESIZE);
972 page_offset = page_size * (data_offset / page_size);
973 file_offset = page_offset;
974 head = data_offset - page_offset;
976 if (data_offset + data_size < file_size)
977 file_size = data_offset + data_size;
979 progress_next = file_size / 16;
980 progress = ui_progress__new("Processing events...", file_size);
981 if (progress == NULL)
984 mmap_size = session->mmap_window;
985 if (mmap_size > file_size)
986 mmap_size = file_size;
988 memset(mmaps, 0, sizeof(mmaps));
990 mmap_prot = PROT_READ;
991 mmap_flags = MAP_SHARED;
993 if (session->header.needs_swap) {
994 mmap_prot |= PROT_WRITE;
995 mmap_flags = MAP_PRIVATE;
998 buf = mmap(NULL, mmap_size, mmap_prot, mmap_flags, session->fd,
1000 if (buf == MAP_FAILED) {
1001 pr_err("failed to mmap file\n");
1005 mmaps[map_idx] = buf;
1006 map_idx = (map_idx + 1) & (ARRAY_SIZE(mmaps) - 1);
1007 file_pos = file_offset + head;
1011 * Ensure we have enough space remaining to read
1012 * the size of the event in the headers.
1014 if (head + sizeof(event->header) > mmap_size)
1017 event = (union perf_event *)(buf + head);
1019 if (session->header.needs_swap)
1020 perf_event_header__bswap(&event->header);
1021 size = event->header.size;
1025 if (head + event->header.size > mmap_size) {
1026 if (mmaps[map_idx]) {
1027 munmap(mmaps[map_idx], mmap_size);
1028 mmaps[map_idx] = NULL;
1031 page_offset = page_size * (head / page_size);
1032 file_offset += page_offset;
1033 head -= page_offset;
1037 size = event->header.size;
1040 perf_session__process_event(session, event, ops, file_pos) < 0) {
1041 dump_printf("%#" PRIx64 " [%#x]: skipping unknown header type: %d\n",
1042 file_offset + head, event->header.size,
1043 event->header.type);
1045 * assume we lost track of the stream, check alignment, and
1046 * increment a single u64 in the hope to catch on again 'soon'.
1048 if (unlikely(head & 7))
1057 if (file_pos >= progress_next) {
1058 progress_next += file_size / 16;
1059 ui_progress__update(progress, file_pos);
1062 if (file_pos < file_size)
1066 /* do the final flush for ordered samples */
1067 session->ordered_samples.next_flush = ULLONG_MAX;
1068 flush_sample_queue(session, ops);
1070 ui_progress__delete(progress);
1071 perf_session__warn_about_errors(session, ops);
1072 perf_session_free_sample_buffers(session);
1076 int perf_session__process_events(struct perf_session *self,
1077 struct perf_event_ops *ops)
1081 if (perf_session__register_idle_thread(self) == NULL)
1085 err = __perf_session__process_events(self,
1086 self->header.data_offset,
1087 self->header.data_size,
1090 err = __perf_session__process_pipe_events(self, ops);
1095 bool perf_session__has_traces(struct perf_session *self, const char *msg)
1097 if (!(self->sample_type & PERF_SAMPLE_RAW)) {
1098 pr_err("No trace sample to read. Did you call 'perf %s'?\n", msg);
1105 int perf_session__set_kallsyms_ref_reloc_sym(struct map **maps,
1106 const char *symbol_name,
1111 struct ref_reloc_sym *ref;
1113 ref = zalloc(sizeof(struct ref_reloc_sym));
1117 ref->name = strdup(symbol_name);
1118 if (ref->name == NULL) {
1123 bracket = strchr(ref->name, ']');
1129 for (i = 0; i < MAP__NR_TYPES; ++i) {
1130 struct kmap *kmap = map__kmap(maps[i]);
1131 kmap->ref_reloc_sym = ref;
1137 size_t perf_session__fprintf_dsos(struct perf_session *self, FILE *fp)
1139 return __dsos__fprintf(&self->host_machine.kernel_dsos, fp) +
1140 __dsos__fprintf(&self->host_machine.user_dsos, fp) +
1141 machines__fprintf_dsos(&self->machines, fp);
1144 size_t perf_session__fprintf_dsos_buildid(struct perf_session *self, FILE *fp,
1147 size_t ret = machine__fprintf_dsos_buildid(&self->host_machine, fp, with_hits);
1148 return ret + machines__fprintf_dsos_buildid(&self->machines, fp, with_hits);
1151 size_t perf_session__fprintf_nr_events(struct perf_session *session, FILE *fp)
1153 struct perf_evsel *pos;
1154 size_t ret = fprintf(fp, "Aggregated stats:\n");
1156 ret += hists__fprintf_nr_events(&session->hists, fp);
1158 list_for_each_entry(pos, &session->evlist->entries, node) {
1159 ret += fprintf(fp, "%s stats:\n", event_name(pos));
1160 ret += hists__fprintf_nr_events(&pos->hists, fp);
1166 struct perf_evsel *perf_session__find_first_evtype(struct perf_session *session,
1169 struct perf_evsel *pos;
1171 list_for_each_entry(pos, &session->evlist->entries, node) {
1172 if (pos->attr.type == type)
1178 void perf_session__print_symbols(union perf_event *event,
1179 struct perf_sample *sample,
1180 struct perf_session *session)
1182 struct addr_location al;
1183 const char *symname, *dsoname;
1184 struct callchain_cursor *cursor = &session->callchain_cursor;
1185 struct callchain_cursor_node *node;
1187 if (perf_event__preprocess_sample(event, session, &al, sample,
1189 error("problem processing %d event, skipping it.\n",
1190 event->header.type);
1194 if (symbol_conf.use_callchain && sample->callchain) {
1196 if (perf_session__resolve_callchain(session, al.thread,
1197 sample->callchain, NULL) != 0) {
1199 error("Failed to resolve callchain. Skipping\n");
1202 callchain_cursor_commit(cursor);
1205 node = callchain_cursor_current(cursor);
1209 if (node->sym && node->sym->name)
1210 symname = node->sym->name;
1214 if (node->map && node->map->dso && node->map->dso->name)
1215 dsoname = node->map->dso->name;
1219 printf("\t%16" PRIx64 " %s (%s)\n", node->ip, symname, dsoname);
1221 callchain_cursor_advance(cursor);
1225 if (al.sym && al.sym->name)
1226 symname = al.sym->name;
1230 if (al.map && al.map->dso && al.map->dso->name)
1231 dsoname = al.map->dso->name;
1235 printf("%16" PRIx64 " %s (%s)", al.addr, symname, dsoname);