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_size = perf_sample_size(self->sample_type);
101 self->sample_id_all = perf_evlist__sample_id_all(self->evlist);
102 perf_session__id_header_size(self);
105 int perf_session__create_kernel_maps(struct perf_session *self)
107 int ret = machine__create_kernel_maps(&self->host_machine);
110 ret = machines__create_guest_kernel_maps(&self->machines);
114 static void perf_session__destroy_kernel_maps(struct perf_session *self)
116 machine__destroy_kernel_maps(&self->host_machine);
117 machines__destroy_guest_kernel_maps(&self->machines);
120 struct perf_session *perf_session__new(const char *filename, int mode,
121 bool force, bool repipe,
122 struct perf_event_ops *ops)
124 size_t len = filename ? strlen(filename) + 1 : 0;
125 struct perf_session *self = zalloc(sizeof(*self) + len);
130 memcpy(self->filename, filename, len);
131 self->threads = RB_ROOT;
132 INIT_LIST_HEAD(&self->dead_threads);
133 self->last_match = NULL;
135 * On 64bit we can mmap the data file in one go. No need for tiny mmap
136 * slices. On 32bit we use 32MB.
138 #if BITS_PER_LONG == 64
139 self->mmap_window = ULLONG_MAX;
141 self->mmap_window = 32 * 1024 * 1024ULL;
143 self->machines = RB_ROOT;
144 self->repipe = repipe;
145 INIT_LIST_HEAD(&self->ordered_samples.samples);
146 INIT_LIST_HEAD(&self->ordered_samples.sample_cache);
147 INIT_LIST_HEAD(&self->ordered_samples.to_free);
148 machine__init(&self->host_machine, "", HOST_KERNEL_ID);
150 if (mode == O_RDONLY) {
151 if (perf_session__open(self, force) < 0)
153 perf_session__update_sample_type(self);
154 } else if (mode == O_WRONLY) {
156 * In O_RDONLY mode this will be performed when reading the
157 * kernel MMAP event, in perf_event__process_mmap().
159 if (perf_session__create_kernel_maps(self) < 0)
163 if (ops && ops->ordering_requires_timestamps &&
164 ops->ordered_samples && !self->sample_id_all) {
165 dump_printf("WARNING: No sample_id_all support, falling back to unordered processing\n");
166 ops->ordered_samples = false;
172 perf_session__delete(self);
176 static void perf_session__delete_dead_threads(struct perf_session *self)
178 struct thread *n, *t;
180 list_for_each_entry_safe(t, n, &self->dead_threads, node) {
186 static void perf_session__delete_threads(struct perf_session *self)
188 struct rb_node *nd = rb_first(&self->threads);
191 struct thread *t = rb_entry(nd, struct thread, rb_node);
193 rb_erase(&t->rb_node, &self->threads);
199 void perf_session__delete(struct perf_session *self)
201 perf_session__destroy_kernel_maps(self);
202 perf_session__delete_dead_threads(self);
203 perf_session__delete_threads(self);
204 machine__exit(&self->host_machine);
209 void perf_session__remove_thread(struct perf_session *self, struct thread *th)
211 self->last_match = NULL;
212 rb_erase(&th->rb_node, &self->threads);
214 * We may have references to this thread, for instance in some hist_entry
215 * instances, so just move them to a separate list.
217 list_add_tail(&th->node, &self->dead_threads);
220 static bool symbol__match_parent_regex(struct symbol *sym)
222 if (sym->name && !regexec(&parent_regex, sym->name, 0, NULL, 0))
228 int perf_session__resolve_callchain(struct perf_session *self,
229 struct thread *thread,
230 struct ip_callchain *chain,
231 struct symbol **parent)
233 u8 cpumode = PERF_RECORD_MISC_USER;
237 callchain_cursor_reset(&self->callchain_cursor);
239 for (i = 0; i < chain->nr; i++) {
240 u64 ip = chain->ips[i];
241 struct addr_location al;
243 if (ip >= PERF_CONTEXT_MAX) {
245 case PERF_CONTEXT_HV:
246 cpumode = PERF_RECORD_MISC_HYPERVISOR; break;
247 case PERF_CONTEXT_KERNEL:
248 cpumode = PERF_RECORD_MISC_KERNEL; break;
249 case PERF_CONTEXT_USER:
250 cpumode = PERF_RECORD_MISC_USER; break;
258 thread__find_addr_location(thread, self, cpumode,
259 MAP__FUNCTION, thread->pid, ip, &al, NULL);
260 if (al.sym != NULL) {
261 if (sort__has_parent && !*parent &&
262 symbol__match_parent_regex(al.sym))
264 if (!symbol_conf.use_callchain)
268 err = callchain_cursor_append(&self->callchain_cursor,
277 static int process_event_synth_stub(union perf_event *event __used,
278 struct perf_session *session __used)
280 dump_printf(": unhandled!\n");
284 static int process_event_sample_stub(union perf_event *event __used,
285 struct perf_sample *sample __used,
286 struct perf_evsel *evsel __used,
287 struct perf_session *session __used)
289 dump_printf(": unhandled!\n");
293 static int process_event_stub(union perf_event *event __used,
294 struct perf_sample *sample __used,
295 struct perf_session *session __used)
297 dump_printf(": unhandled!\n");
301 static int process_finished_round_stub(union perf_event *event __used,
302 struct perf_session *session __used,
303 struct perf_event_ops *ops __used)
305 dump_printf(": unhandled!\n");
309 static int process_finished_round(union perf_event *event,
310 struct perf_session *session,
311 struct perf_event_ops *ops);
313 static void perf_event_ops__fill_defaults(struct perf_event_ops *handler)
315 if (handler->sample == NULL)
316 handler->sample = process_event_sample_stub;
317 if (handler->mmap == NULL)
318 handler->mmap = process_event_stub;
319 if (handler->comm == NULL)
320 handler->comm = process_event_stub;
321 if (handler->fork == NULL)
322 handler->fork = process_event_stub;
323 if (handler->exit == NULL)
324 handler->exit = process_event_stub;
325 if (handler->lost == NULL)
326 handler->lost = perf_event__process_lost;
327 if (handler->read == NULL)
328 handler->read = process_event_stub;
329 if (handler->throttle == NULL)
330 handler->throttle = process_event_stub;
331 if (handler->unthrottle == NULL)
332 handler->unthrottle = process_event_stub;
333 if (handler->attr == NULL)
334 handler->attr = process_event_synth_stub;
335 if (handler->event_type == NULL)
336 handler->event_type = process_event_synth_stub;
337 if (handler->tracing_data == NULL)
338 handler->tracing_data = process_event_synth_stub;
339 if (handler->build_id == NULL)
340 handler->build_id = process_event_synth_stub;
341 if (handler->finished_round == NULL) {
342 if (handler->ordered_samples)
343 handler->finished_round = process_finished_round;
345 handler->finished_round = process_finished_round_stub;
349 void mem_bswap_64(void *src, int byte_size)
353 while (byte_size > 0) {
355 byte_size -= sizeof(u64);
360 static void perf_event__all64_swap(union perf_event *event)
362 struct perf_event_header *hdr = &event->header;
363 mem_bswap_64(hdr + 1, event->header.size - sizeof(*hdr));
366 static void perf_event__comm_swap(union perf_event *event)
368 event->comm.pid = bswap_32(event->comm.pid);
369 event->comm.tid = bswap_32(event->comm.tid);
372 static void perf_event__mmap_swap(union perf_event *event)
374 event->mmap.pid = bswap_32(event->mmap.pid);
375 event->mmap.tid = bswap_32(event->mmap.tid);
376 event->mmap.start = bswap_64(event->mmap.start);
377 event->mmap.len = bswap_64(event->mmap.len);
378 event->mmap.pgoff = bswap_64(event->mmap.pgoff);
381 static void perf_event__task_swap(union perf_event *event)
383 event->fork.pid = bswap_32(event->fork.pid);
384 event->fork.tid = bswap_32(event->fork.tid);
385 event->fork.ppid = bswap_32(event->fork.ppid);
386 event->fork.ptid = bswap_32(event->fork.ptid);
387 event->fork.time = bswap_64(event->fork.time);
390 static void perf_event__read_swap(union perf_event *event)
392 event->read.pid = bswap_32(event->read.pid);
393 event->read.tid = bswap_32(event->read.tid);
394 event->read.value = bswap_64(event->read.value);
395 event->read.time_enabled = bswap_64(event->read.time_enabled);
396 event->read.time_running = bswap_64(event->read.time_running);
397 event->read.id = bswap_64(event->read.id);
400 static void perf_event__attr_swap(union perf_event *event)
404 event->attr.attr.type = bswap_32(event->attr.attr.type);
405 event->attr.attr.size = bswap_32(event->attr.attr.size);
406 event->attr.attr.config = bswap_64(event->attr.attr.config);
407 event->attr.attr.sample_period = bswap_64(event->attr.attr.sample_period);
408 event->attr.attr.sample_type = bswap_64(event->attr.attr.sample_type);
409 event->attr.attr.read_format = bswap_64(event->attr.attr.read_format);
410 event->attr.attr.wakeup_events = bswap_32(event->attr.attr.wakeup_events);
411 event->attr.attr.bp_type = bswap_32(event->attr.attr.bp_type);
412 event->attr.attr.bp_addr = bswap_64(event->attr.attr.bp_addr);
413 event->attr.attr.bp_len = bswap_64(event->attr.attr.bp_len);
415 size = event->header.size;
416 size -= (void *)&event->attr.id - (void *)event;
417 mem_bswap_64(event->attr.id, size);
420 static void perf_event__event_type_swap(union perf_event *event)
422 event->event_type.event_type.event_id =
423 bswap_64(event->event_type.event_type.event_id);
426 static void perf_event__tracing_data_swap(union perf_event *event)
428 event->tracing_data.size = bswap_32(event->tracing_data.size);
431 typedef void (*perf_event__swap_op)(union perf_event *event);
433 static perf_event__swap_op perf_event__swap_ops[] = {
434 [PERF_RECORD_MMAP] = perf_event__mmap_swap,
435 [PERF_RECORD_COMM] = perf_event__comm_swap,
436 [PERF_RECORD_FORK] = perf_event__task_swap,
437 [PERF_RECORD_EXIT] = perf_event__task_swap,
438 [PERF_RECORD_LOST] = perf_event__all64_swap,
439 [PERF_RECORD_READ] = perf_event__read_swap,
440 [PERF_RECORD_SAMPLE] = perf_event__all64_swap,
441 [PERF_RECORD_HEADER_ATTR] = perf_event__attr_swap,
442 [PERF_RECORD_HEADER_EVENT_TYPE] = perf_event__event_type_swap,
443 [PERF_RECORD_HEADER_TRACING_DATA] = perf_event__tracing_data_swap,
444 [PERF_RECORD_HEADER_BUILD_ID] = NULL,
445 [PERF_RECORD_HEADER_MAX] = NULL,
448 struct sample_queue {
451 union perf_event *event;
452 struct list_head list;
455 static void perf_session_free_sample_buffers(struct perf_session *session)
457 struct ordered_samples *os = &session->ordered_samples;
459 while (!list_empty(&os->to_free)) {
460 struct sample_queue *sq;
462 sq = list_entry(os->to_free.next, struct sample_queue, list);
468 static int perf_session_deliver_event(struct perf_session *session,
469 union perf_event *event,
470 struct perf_sample *sample,
471 struct perf_event_ops *ops,
474 static void flush_sample_queue(struct perf_session *s,
475 struct perf_event_ops *ops)
477 struct ordered_samples *os = &s->ordered_samples;
478 struct list_head *head = &os->samples;
479 struct sample_queue *tmp, *iter;
480 struct perf_sample sample;
481 u64 limit = os->next_flush;
482 u64 last_ts = os->last_sample ? os->last_sample->timestamp : 0ULL;
484 if (!ops->ordered_samples || !limit)
487 list_for_each_entry_safe(iter, tmp, head, list) {
488 if (iter->timestamp > limit)
491 perf_session__parse_sample(s, iter->event, &sample);
492 perf_session_deliver_event(s, iter->event, &sample, ops,
495 os->last_flush = iter->timestamp;
496 list_del(&iter->list);
497 list_add(&iter->list, &os->sample_cache);
500 if (list_empty(head)) {
501 os->last_sample = NULL;
502 } else if (last_ts <= limit) {
504 list_entry(head->prev, struct sample_queue, list);
509 * When perf record finishes a pass on every buffers, it records this pseudo
511 * We record the max timestamp t found in the pass n.
512 * Assuming these timestamps are monotonic across cpus, we know that if
513 * a buffer still has events with timestamps below t, they will be all
514 * available and then read in the pass n + 1.
515 * Hence when we start to read the pass n + 2, we can safely flush every
516 * events with timestamps below t.
518 * ============ PASS n =================
521 * cnt1 timestamps | cnt2 timestamps
524 * - | 4 <--- max recorded
526 * ============ PASS n + 1 ==============
529 * cnt1 timestamps | cnt2 timestamps
532 * 5 | 7 <---- max recorded
534 * Flush every events below timestamp 4
536 * ============ PASS n + 2 ==============
539 * cnt1 timestamps | cnt2 timestamps
544 * Flush every events below timestamp 7
547 static int process_finished_round(union perf_event *event __used,
548 struct perf_session *session,
549 struct perf_event_ops *ops)
551 flush_sample_queue(session, ops);
552 session->ordered_samples.next_flush = session->ordered_samples.max_timestamp;
557 /* The queue is ordered by time */
558 static void __queue_event(struct sample_queue *new, struct perf_session *s)
560 struct ordered_samples *os = &s->ordered_samples;
561 struct sample_queue *sample = os->last_sample;
562 u64 timestamp = new->timestamp;
565 os->last_sample = new;
568 list_add(&new->list, &os->samples);
569 os->max_timestamp = timestamp;
574 * last_sample might point to some random place in the list as it's
575 * the last queued event. We expect that the new event is close to
578 if (sample->timestamp <= timestamp) {
579 while (sample->timestamp <= timestamp) {
580 p = sample->list.next;
581 if (p == &os->samples) {
582 list_add_tail(&new->list, &os->samples);
583 os->max_timestamp = timestamp;
586 sample = list_entry(p, struct sample_queue, list);
588 list_add_tail(&new->list, &sample->list);
590 while (sample->timestamp > timestamp) {
591 p = sample->list.prev;
592 if (p == &os->samples) {
593 list_add(&new->list, &os->samples);
596 sample = list_entry(p, struct sample_queue, list);
598 list_add(&new->list, &sample->list);
602 #define MAX_SAMPLE_BUFFER (64 * 1024 / sizeof(struct sample_queue))
604 static int perf_session_queue_event(struct perf_session *s, union perf_event *event,
605 struct perf_sample *sample, u64 file_offset)
607 struct ordered_samples *os = &s->ordered_samples;
608 struct list_head *sc = &os->sample_cache;
609 u64 timestamp = sample->time;
610 struct sample_queue *new;
612 if (!timestamp || timestamp == ~0ULL)
615 if (timestamp < s->ordered_samples.last_flush) {
616 printf("Warning: Timestamp below last timeslice flush\n");
620 if (!list_empty(sc)) {
621 new = list_entry(sc->next, struct sample_queue, list);
622 list_del(&new->list);
623 } else if (os->sample_buffer) {
624 new = os->sample_buffer + os->sample_buffer_idx;
625 if (++os->sample_buffer_idx == MAX_SAMPLE_BUFFER)
626 os->sample_buffer = NULL;
628 os->sample_buffer = malloc(MAX_SAMPLE_BUFFER * sizeof(*new));
629 if (!os->sample_buffer)
631 list_add(&os->sample_buffer->list, &os->to_free);
632 os->sample_buffer_idx = 2;
633 new = os->sample_buffer + 1;
636 new->timestamp = timestamp;
637 new->file_offset = file_offset;
640 __queue_event(new, s);
645 static void callchain__printf(struct perf_sample *sample)
649 printf("... chain: nr:%" PRIu64 "\n", sample->callchain->nr);
651 for (i = 0; i < sample->callchain->nr; i++)
652 printf("..... %2d: %016" PRIx64 "\n",
653 i, sample->callchain->ips[i]);
656 static void perf_session__print_tstamp(struct perf_session *session,
657 union perf_event *event,
658 struct perf_sample *sample)
660 if (event->header.type != PERF_RECORD_SAMPLE &&
661 !session->sample_id_all) {
662 fputs("-1 -1 ", stdout);
666 if ((session->sample_type & PERF_SAMPLE_CPU))
667 printf("%u ", sample->cpu);
669 if (session->sample_type & PERF_SAMPLE_TIME)
670 printf("%" PRIu64 " ", sample->time);
673 static void dump_event(struct perf_session *session, union perf_event *event,
674 u64 file_offset, struct perf_sample *sample)
679 printf("\n%#" PRIx64 " [%#x]: event: %d\n",
680 file_offset, event->header.size, event->header.type);
685 perf_session__print_tstamp(session, event, sample);
687 printf("%#" PRIx64 " [%#x]: PERF_RECORD_%s", file_offset,
688 event->header.size, perf_event__name(event->header.type));
691 static void dump_sample(struct perf_session *session, union perf_event *event,
692 struct perf_sample *sample)
697 printf("(IP, %d): %d/%d: %#" PRIx64 " period: %" PRIu64 "\n",
698 event->header.misc, sample->pid, sample->tid, sample->ip,
701 if (session->sample_type & PERF_SAMPLE_CALLCHAIN)
702 callchain__printf(sample);
705 static int perf_session_deliver_event(struct perf_session *session,
706 union perf_event *event,
707 struct perf_sample *sample,
708 struct perf_event_ops *ops,
711 struct perf_evsel *evsel;
713 dump_event(session, event, file_offset, sample);
715 switch (event->header.type) {
716 case PERF_RECORD_SAMPLE:
717 dump_sample(session, event, sample);
718 evsel = perf_evlist__id2evsel(session->evlist, sample->id);
720 ++session->hists.stats.nr_unknown_id;
723 return ops->sample(event, sample, evsel, session);
724 case PERF_RECORD_MMAP:
725 return ops->mmap(event, sample, session);
726 case PERF_RECORD_COMM:
727 return ops->comm(event, sample, session);
728 case PERF_RECORD_FORK:
729 return ops->fork(event, sample, session);
730 case PERF_RECORD_EXIT:
731 return ops->exit(event, sample, session);
732 case PERF_RECORD_LOST:
733 return ops->lost(event, sample, session);
734 case PERF_RECORD_READ:
735 return ops->read(event, sample, session);
736 case PERF_RECORD_THROTTLE:
737 return ops->throttle(event, sample, session);
738 case PERF_RECORD_UNTHROTTLE:
739 return ops->unthrottle(event, sample, session);
741 ++session->hists.stats.nr_unknown_events;
746 static int perf_session__preprocess_sample(struct perf_session *session,
747 union perf_event *event, struct perf_sample *sample)
749 if (event->header.type != PERF_RECORD_SAMPLE ||
750 !(session->sample_type & PERF_SAMPLE_CALLCHAIN))
753 if (!ip_callchain__valid(sample->callchain, event)) {
754 pr_debug("call-chain problem with event, skipping it.\n");
755 ++session->hists.stats.nr_invalid_chains;
756 session->hists.stats.total_invalid_chains += sample->period;
762 static int perf_session__process_user_event(struct perf_session *session, union perf_event *event,
763 struct perf_event_ops *ops, u64 file_offset)
765 dump_event(session, event, file_offset, NULL);
767 /* These events are processed right away */
768 switch (event->header.type) {
769 case PERF_RECORD_HEADER_ATTR:
770 return ops->attr(event, session);
771 case PERF_RECORD_HEADER_EVENT_TYPE:
772 return ops->event_type(event, session);
773 case PERF_RECORD_HEADER_TRACING_DATA:
774 /* setup for reading amidst mmap */
775 lseek(session->fd, file_offset, SEEK_SET);
776 return ops->tracing_data(event, session);
777 case PERF_RECORD_HEADER_BUILD_ID:
778 return ops->build_id(event, session);
779 case PERF_RECORD_FINISHED_ROUND:
780 return ops->finished_round(event, session, ops);
786 static int perf_session__process_event(struct perf_session *session,
787 union perf_event *event,
788 struct perf_event_ops *ops,
791 struct perf_sample sample;
794 if (session->header.needs_swap &&
795 perf_event__swap_ops[event->header.type])
796 perf_event__swap_ops[event->header.type](event);
798 if (event->header.type >= PERF_RECORD_HEADER_MAX)
801 hists__inc_nr_events(&session->hists, event->header.type);
803 if (event->header.type >= PERF_RECORD_USER_TYPE_START)
804 return perf_session__process_user_event(session, event, ops, file_offset);
807 * For all kernel events we get the sample data
809 perf_session__parse_sample(session, event, &sample);
811 /* Preprocess sample records - precheck callchains */
812 if (perf_session__preprocess_sample(session, event, &sample))
815 if (ops->ordered_samples) {
816 ret = perf_session_queue_event(session, event, &sample,
822 return perf_session_deliver_event(session, event, &sample, ops,
826 void perf_event_header__bswap(struct perf_event_header *self)
828 self->type = bswap_32(self->type);
829 self->misc = bswap_16(self->misc);
830 self->size = bswap_16(self->size);
833 static struct thread *perf_session__register_idle_thread(struct perf_session *self)
835 struct thread *thread = perf_session__findnew(self, 0);
837 if (thread == NULL || thread__set_comm(thread, "swapper")) {
838 pr_err("problem inserting idle task.\n");
845 static void perf_session__warn_about_errors(const struct perf_session *session,
846 const struct perf_event_ops *ops)
848 if (ops->lost == perf_event__process_lost &&
849 session->hists.stats.total_lost != 0) {
850 ui__warning("Processed %" PRIu64 " events and LOST %" PRIu64
851 "!\n\nCheck IO/CPU overload!\n\n",
852 session->hists.stats.total_period,
853 session->hists.stats.total_lost);
856 if (session->hists.stats.nr_unknown_events != 0) {
857 ui__warning("Found %u unknown events!\n\n"
858 "Is this an older tool processing a perf.data "
859 "file generated by a more recent tool?\n\n"
860 "If that is not the case, consider "
861 "reporting to linux-kernel@vger.kernel.org.\n\n",
862 session->hists.stats.nr_unknown_events);
865 if (session->hists.stats.nr_unknown_id != 0) {
866 ui__warning("%u samples with id not present in the header\n",
867 session->hists.stats.nr_unknown_id);
870 if (session->hists.stats.nr_invalid_chains != 0) {
871 ui__warning("Found invalid callchains!\n\n"
872 "%u out of %u events were discarded for this reason.\n\n"
873 "Consider reporting to linux-kernel@vger.kernel.org.\n\n",
874 session->hists.stats.nr_invalid_chains,
875 session->hists.stats.nr_events[PERF_RECORD_SAMPLE]);
879 #define session_done() (*(volatile int *)(&session_done))
880 volatile int session_done;
882 static int __perf_session__process_pipe_events(struct perf_session *self,
883 struct perf_event_ops *ops)
885 union perf_event event;
892 perf_event_ops__fill_defaults(ops);
896 err = readn(self->fd, &event, sizeof(struct perf_event_header));
901 pr_err("failed to read event header\n");
905 if (self->header.needs_swap)
906 perf_event_header__bswap(&event.header);
908 size = event.header.size;
913 p += sizeof(struct perf_event_header);
915 if (size - sizeof(struct perf_event_header)) {
916 err = readn(self->fd, p, size - sizeof(struct perf_event_header));
919 pr_err("unexpected end of event stream\n");
923 pr_err("failed to read event data\n");
929 (skip = perf_session__process_event(self, &event, ops, head)) < 0) {
930 dump_printf("%#" PRIx64 " [%#x]: skipping unknown header type: %d\n",
931 head, event.header.size, event.header.type);
933 * assume we lost track of the stream, check alignment, and
934 * increment a single u64 in the hope to catch on again 'soon'.
936 if (unlikely(head & 7))
952 perf_session__warn_about_errors(self, ops);
953 perf_session_free_sample_buffers(self);
957 int __perf_session__process_events(struct perf_session *session,
958 u64 data_offset, u64 data_size,
959 u64 file_size, struct perf_event_ops *ops)
961 u64 head, page_offset, file_offset, file_pos, progress_next;
962 int err, mmap_prot, mmap_flags, map_idx = 0;
963 struct ui_progress *progress;
964 size_t page_size, mmap_size;
965 char *buf, *mmaps[8];
966 union perf_event *event;
969 perf_event_ops__fill_defaults(ops);
971 page_size = sysconf(_SC_PAGESIZE);
973 page_offset = page_size * (data_offset / page_size);
974 file_offset = page_offset;
975 head = data_offset - page_offset;
977 if (data_offset + data_size < file_size)
978 file_size = data_offset + data_size;
980 progress_next = file_size / 16;
981 progress = ui_progress__new("Processing events...", file_size);
982 if (progress == NULL)
985 mmap_size = session->mmap_window;
986 if (mmap_size > file_size)
987 mmap_size = file_size;
989 memset(mmaps, 0, sizeof(mmaps));
991 mmap_prot = PROT_READ;
992 mmap_flags = MAP_SHARED;
994 if (session->header.needs_swap) {
995 mmap_prot |= PROT_WRITE;
996 mmap_flags = MAP_PRIVATE;
999 buf = mmap(NULL, mmap_size, mmap_prot, mmap_flags, session->fd,
1001 if (buf == MAP_FAILED) {
1002 pr_err("failed to mmap file\n");
1006 mmaps[map_idx] = buf;
1007 map_idx = (map_idx + 1) & (ARRAY_SIZE(mmaps) - 1);
1008 file_pos = file_offset + head;
1012 * Ensure we have enough space remaining to read
1013 * the size of the event in the headers.
1015 if (head + sizeof(event->header) > mmap_size)
1018 event = (union perf_event *)(buf + head);
1020 if (session->header.needs_swap)
1021 perf_event_header__bswap(&event->header);
1023 if (head + event->header.size > mmap_size) {
1024 if (mmaps[map_idx]) {
1025 munmap(mmaps[map_idx], mmap_size);
1026 mmaps[map_idx] = NULL;
1029 page_offset = page_size * (head / page_size);
1030 file_offset += page_offset;
1031 head -= page_offset;
1035 size = event->header.size;
1038 perf_session__process_event(session, event, ops, file_pos) < 0) {
1039 dump_printf("%#" PRIx64 " [%#x]: skipping unknown header type: %d\n",
1040 file_offset + head, event->header.size,
1041 event->header.type);
1043 * assume we lost track of the stream, check alignment, and
1044 * increment a single u64 in the hope to catch on again 'soon'.
1046 if (unlikely(head & 7))
1055 if (file_pos >= progress_next) {
1056 progress_next += file_size / 16;
1057 ui_progress__update(progress, file_pos);
1060 if (file_pos < file_size)
1064 /* do the final flush for ordered samples */
1065 session->ordered_samples.next_flush = ULLONG_MAX;
1066 flush_sample_queue(session, ops);
1068 ui_progress__delete(progress);
1069 perf_session__warn_about_errors(session, ops);
1070 perf_session_free_sample_buffers(session);
1074 int perf_session__process_events(struct perf_session *self,
1075 struct perf_event_ops *ops)
1079 if (perf_session__register_idle_thread(self) == NULL)
1083 err = __perf_session__process_events(self,
1084 self->header.data_offset,
1085 self->header.data_size,
1088 err = __perf_session__process_pipe_events(self, ops);
1093 bool perf_session__has_traces(struct perf_session *self, const char *msg)
1095 if (!(self->sample_type & PERF_SAMPLE_RAW)) {
1096 pr_err("No trace sample to read. Did you call 'perf %s'?\n", msg);
1103 int perf_session__set_kallsyms_ref_reloc_sym(struct map **maps,
1104 const char *symbol_name,
1109 struct ref_reloc_sym *ref;
1111 ref = zalloc(sizeof(struct ref_reloc_sym));
1115 ref->name = strdup(symbol_name);
1116 if (ref->name == NULL) {
1121 bracket = strchr(ref->name, ']');
1127 for (i = 0; i < MAP__NR_TYPES; ++i) {
1128 struct kmap *kmap = map__kmap(maps[i]);
1129 kmap->ref_reloc_sym = ref;
1135 size_t perf_session__fprintf_dsos(struct perf_session *self, FILE *fp)
1137 return __dsos__fprintf(&self->host_machine.kernel_dsos, fp) +
1138 __dsos__fprintf(&self->host_machine.user_dsos, fp) +
1139 machines__fprintf_dsos(&self->machines, fp);
1142 size_t perf_session__fprintf_dsos_buildid(struct perf_session *self, FILE *fp,
1145 size_t ret = machine__fprintf_dsos_buildid(&self->host_machine, fp, with_hits);
1146 return ret + machines__fprintf_dsos_buildid(&self->machines, fp, with_hits);
1149 size_t perf_session__fprintf_nr_events(struct perf_session *session, FILE *fp)
1151 struct perf_evsel *pos;
1152 size_t ret = fprintf(fp, "Aggregated stats:\n");
1154 ret += hists__fprintf_nr_events(&session->hists, fp);
1156 list_for_each_entry(pos, &session->evlist->entries, node) {
1157 ret += fprintf(fp, "%s stats:\n", event_name(pos));
1158 ret += hists__fprintf_nr_events(&pos->hists, fp);
1164 struct perf_evsel *perf_session__find_first_evtype(struct perf_session *session,
1167 struct perf_evsel *pos;
1169 list_for_each_entry(pos, &session->evlist->entries, node) {
1170 if (pos->attr.type == type)
1176 void perf_session__print_symbols(union perf_event *event,
1177 struct perf_sample *sample,
1178 struct perf_session *session)
1180 struct addr_location al;
1181 const char *symname, *dsoname;
1182 struct callchain_cursor *cursor = &session->callchain_cursor;
1183 struct callchain_cursor_node *node;
1185 if (perf_event__preprocess_sample(event, session, &al, sample,
1187 error("problem processing %d event, skipping it.\n",
1188 event->header.type);
1192 if (symbol_conf.use_callchain && sample->callchain) {
1194 if (perf_session__resolve_callchain(session, al.thread,
1195 sample->callchain, NULL) != 0) {
1197 error("Failed to resolve callchain. Skipping\n");
1200 callchain_cursor_commit(cursor);
1203 node = callchain_cursor_current(cursor);
1207 if (node->sym && node->sym->name)
1208 symname = node->sym->name;
1212 if (node->map && node->map->dso && node->map->dso->name)
1213 dsoname = node->map->dso->name;
1217 printf("\t%16" PRIx64 " %s (%s)\n", node->ip, symname, dsoname);
1219 callchain_cursor_advance(cursor);
1223 if (al.sym && al.sym->name)
1224 symname = al.sym->name;
1228 if (al.map && al.map->dso && al.map->dso->name)
1229 dsoname = al.map->dso->name;
1233 printf("%16" PRIx64 " %s (%s)", al.addr, symname, dsoname);