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_stub(union perf_event *event __used,
284 struct perf_sample *sample __used,
285 struct perf_session *session __used)
287 dump_printf(": unhandled!\n");
291 static int process_finished_round_stub(union perf_event *event __used,
292 struct perf_session *session __used,
293 struct perf_event_ops *ops __used)
295 dump_printf(": unhandled!\n");
299 static int process_finished_round(union perf_event *event,
300 struct perf_session *session,
301 struct perf_event_ops *ops);
303 static void perf_event_ops__fill_defaults(struct perf_event_ops *handler)
305 if (handler->sample == NULL)
306 handler->sample = process_event_stub;
307 if (handler->mmap == NULL)
308 handler->mmap = process_event_stub;
309 if (handler->comm == NULL)
310 handler->comm = process_event_stub;
311 if (handler->fork == NULL)
312 handler->fork = process_event_stub;
313 if (handler->exit == NULL)
314 handler->exit = process_event_stub;
315 if (handler->lost == NULL)
316 handler->lost = perf_event__process_lost;
317 if (handler->read == NULL)
318 handler->read = process_event_stub;
319 if (handler->throttle == NULL)
320 handler->throttle = process_event_stub;
321 if (handler->unthrottle == NULL)
322 handler->unthrottle = process_event_stub;
323 if (handler->attr == NULL)
324 handler->attr = process_event_synth_stub;
325 if (handler->event_type == NULL)
326 handler->event_type = process_event_synth_stub;
327 if (handler->tracing_data == NULL)
328 handler->tracing_data = process_event_synth_stub;
329 if (handler->build_id == NULL)
330 handler->build_id = process_event_synth_stub;
331 if (handler->finished_round == NULL) {
332 if (handler->ordered_samples)
333 handler->finished_round = process_finished_round;
335 handler->finished_round = process_finished_round_stub;
339 void mem_bswap_64(void *src, int byte_size)
343 while (byte_size > 0) {
345 byte_size -= sizeof(u64);
350 static void perf_event__all64_swap(union perf_event *event)
352 struct perf_event_header *hdr = &event->header;
353 mem_bswap_64(hdr + 1, event->header.size - sizeof(*hdr));
356 static void perf_event__comm_swap(union perf_event *event)
358 event->comm.pid = bswap_32(event->comm.pid);
359 event->comm.tid = bswap_32(event->comm.tid);
362 static void perf_event__mmap_swap(union perf_event *event)
364 event->mmap.pid = bswap_32(event->mmap.pid);
365 event->mmap.tid = bswap_32(event->mmap.tid);
366 event->mmap.start = bswap_64(event->mmap.start);
367 event->mmap.len = bswap_64(event->mmap.len);
368 event->mmap.pgoff = bswap_64(event->mmap.pgoff);
371 static void perf_event__task_swap(union perf_event *event)
373 event->fork.pid = bswap_32(event->fork.pid);
374 event->fork.tid = bswap_32(event->fork.tid);
375 event->fork.ppid = bswap_32(event->fork.ppid);
376 event->fork.ptid = bswap_32(event->fork.ptid);
377 event->fork.time = bswap_64(event->fork.time);
380 static void perf_event__read_swap(union perf_event *event)
382 event->read.pid = bswap_32(event->read.pid);
383 event->read.tid = bswap_32(event->read.tid);
384 event->read.value = bswap_64(event->read.value);
385 event->read.time_enabled = bswap_64(event->read.time_enabled);
386 event->read.time_running = bswap_64(event->read.time_running);
387 event->read.id = bswap_64(event->read.id);
390 static void perf_event__attr_swap(union perf_event *event)
394 event->attr.attr.type = bswap_32(event->attr.attr.type);
395 event->attr.attr.size = bswap_32(event->attr.attr.size);
396 event->attr.attr.config = bswap_64(event->attr.attr.config);
397 event->attr.attr.sample_period = bswap_64(event->attr.attr.sample_period);
398 event->attr.attr.sample_type = bswap_64(event->attr.attr.sample_type);
399 event->attr.attr.read_format = bswap_64(event->attr.attr.read_format);
400 event->attr.attr.wakeup_events = bswap_32(event->attr.attr.wakeup_events);
401 event->attr.attr.bp_type = bswap_32(event->attr.attr.bp_type);
402 event->attr.attr.bp_addr = bswap_64(event->attr.attr.bp_addr);
403 event->attr.attr.bp_len = bswap_64(event->attr.attr.bp_len);
405 size = event->header.size;
406 size -= (void *)&event->attr.id - (void *)event;
407 mem_bswap_64(event->attr.id, size);
410 static void perf_event__event_type_swap(union perf_event *event)
412 event->event_type.event_type.event_id =
413 bswap_64(event->event_type.event_type.event_id);
416 static void perf_event__tracing_data_swap(union perf_event *event)
418 event->tracing_data.size = bswap_32(event->tracing_data.size);
421 typedef void (*perf_event__swap_op)(union perf_event *event);
423 static perf_event__swap_op perf_event__swap_ops[] = {
424 [PERF_RECORD_MMAP] = perf_event__mmap_swap,
425 [PERF_RECORD_COMM] = perf_event__comm_swap,
426 [PERF_RECORD_FORK] = perf_event__task_swap,
427 [PERF_RECORD_EXIT] = perf_event__task_swap,
428 [PERF_RECORD_LOST] = perf_event__all64_swap,
429 [PERF_RECORD_READ] = perf_event__read_swap,
430 [PERF_RECORD_SAMPLE] = perf_event__all64_swap,
431 [PERF_RECORD_HEADER_ATTR] = perf_event__attr_swap,
432 [PERF_RECORD_HEADER_EVENT_TYPE] = perf_event__event_type_swap,
433 [PERF_RECORD_HEADER_TRACING_DATA] = perf_event__tracing_data_swap,
434 [PERF_RECORD_HEADER_BUILD_ID] = NULL,
435 [PERF_RECORD_HEADER_MAX] = NULL,
438 struct sample_queue {
441 union perf_event *event;
442 struct list_head list;
445 static void perf_session_free_sample_buffers(struct perf_session *session)
447 struct ordered_samples *os = &session->ordered_samples;
449 while (!list_empty(&os->to_free)) {
450 struct sample_queue *sq;
452 sq = list_entry(os->to_free.next, struct sample_queue, list);
458 static int perf_session_deliver_event(struct perf_session *session,
459 union perf_event *event,
460 struct perf_sample *sample,
461 struct perf_event_ops *ops,
464 static void flush_sample_queue(struct perf_session *s,
465 struct perf_event_ops *ops)
467 struct ordered_samples *os = &s->ordered_samples;
468 struct list_head *head = &os->samples;
469 struct sample_queue *tmp, *iter;
470 struct perf_sample sample;
471 u64 limit = os->next_flush;
472 u64 last_ts = os->last_sample ? os->last_sample->timestamp : 0ULL;
474 if (!ops->ordered_samples || !limit)
477 list_for_each_entry_safe(iter, tmp, head, list) {
478 if (iter->timestamp > limit)
481 perf_session__parse_sample(s, iter->event, &sample);
482 perf_session_deliver_event(s, iter->event, &sample, ops,
485 os->last_flush = iter->timestamp;
486 list_del(&iter->list);
487 list_add(&iter->list, &os->sample_cache);
490 if (list_empty(head)) {
491 os->last_sample = NULL;
492 } else if (last_ts <= limit) {
494 list_entry(head->prev, struct sample_queue, list);
499 * When perf record finishes a pass on every buffers, it records this pseudo
501 * We record the max timestamp t found in the pass n.
502 * Assuming these timestamps are monotonic across cpus, we know that if
503 * a buffer still has events with timestamps below t, they will be all
504 * available and then read in the pass n + 1.
505 * Hence when we start to read the pass n + 2, we can safely flush every
506 * events with timestamps below t.
508 * ============ PASS n =================
511 * cnt1 timestamps | cnt2 timestamps
514 * - | 4 <--- max recorded
516 * ============ PASS n + 1 ==============
519 * cnt1 timestamps | cnt2 timestamps
522 * 5 | 7 <---- max recorded
524 * Flush every events below timestamp 4
526 * ============ PASS n + 2 ==============
529 * cnt1 timestamps | cnt2 timestamps
534 * Flush every events below timestamp 7
537 static int process_finished_round(union perf_event *event __used,
538 struct perf_session *session,
539 struct perf_event_ops *ops)
541 flush_sample_queue(session, ops);
542 session->ordered_samples.next_flush = session->ordered_samples.max_timestamp;
547 /* The queue is ordered by time */
548 static void __queue_event(struct sample_queue *new, struct perf_session *s)
550 struct ordered_samples *os = &s->ordered_samples;
551 struct sample_queue *sample = os->last_sample;
552 u64 timestamp = new->timestamp;
555 os->last_sample = new;
558 list_add(&new->list, &os->samples);
559 os->max_timestamp = timestamp;
564 * last_sample might point to some random place in the list as it's
565 * the last queued event. We expect that the new event is close to
568 if (sample->timestamp <= timestamp) {
569 while (sample->timestamp <= timestamp) {
570 p = sample->list.next;
571 if (p == &os->samples) {
572 list_add_tail(&new->list, &os->samples);
573 os->max_timestamp = timestamp;
576 sample = list_entry(p, struct sample_queue, list);
578 list_add_tail(&new->list, &sample->list);
580 while (sample->timestamp > timestamp) {
581 p = sample->list.prev;
582 if (p == &os->samples) {
583 list_add(&new->list, &os->samples);
586 sample = list_entry(p, struct sample_queue, list);
588 list_add(&new->list, &sample->list);
592 #define MAX_SAMPLE_BUFFER (64 * 1024 / sizeof(struct sample_queue))
594 static int perf_session_queue_event(struct perf_session *s, union perf_event *event,
595 struct perf_sample *sample, u64 file_offset)
597 struct ordered_samples *os = &s->ordered_samples;
598 struct list_head *sc = &os->sample_cache;
599 u64 timestamp = sample->time;
600 struct sample_queue *new;
602 if (!timestamp || timestamp == ~0ULL)
605 if (timestamp < s->ordered_samples.last_flush) {
606 printf("Warning: Timestamp below last timeslice flush\n");
610 if (!list_empty(sc)) {
611 new = list_entry(sc->next, struct sample_queue, list);
612 list_del(&new->list);
613 } else if (os->sample_buffer) {
614 new = os->sample_buffer + os->sample_buffer_idx;
615 if (++os->sample_buffer_idx == MAX_SAMPLE_BUFFER)
616 os->sample_buffer = NULL;
618 os->sample_buffer = malloc(MAX_SAMPLE_BUFFER * sizeof(*new));
619 if (!os->sample_buffer)
621 list_add(&os->sample_buffer->list, &os->to_free);
622 os->sample_buffer_idx = 2;
623 new = os->sample_buffer + 1;
626 new->timestamp = timestamp;
627 new->file_offset = file_offset;
630 __queue_event(new, s);
635 static void callchain__printf(struct perf_sample *sample)
639 printf("... chain: nr:%" PRIu64 "\n", sample->callchain->nr);
641 for (i = 0; i < sample->callchain->nr; i++)
642 printf("..... %2d: %016" PRIx64 "\n",
643 i, sample->callchain->ips[i]);
646 static void perf_session__print_tstamp(struct perf_session *session,
647 union perf_event *event,
648 struct perf_sample *sample)
650 if (event->header.type != PERF_RECORD_SAMPLE &&
651 !session->sample_id_all) {
652 fputs("-1 -1 ", stdout);
656 if ((session->sample_type & PERF_SAMPLE_CPU))
657 printf("%u ", sample->cpu);
659 if (session->sample_type & PERF_SAMPLE_TIME)
660 printf("%" PRIu64 " ", sample->time);
663 static void dump_event(struct perf_session *session, union perf_event *event,
664 u64 file_offset, struct perf_sample *sample)
669 printf("\n%#" PRIx64 " [%#x]: event: %d\n",
670 file_offset, event->header.size, event->header.type);
675 perf_session__print_tstamp(session, event, sample);
677 printf("%#" PRIx64 " [%#x]: PERF_RECORD_%s", file_offset,
678 event->header.size, perf_event__name(event->header.type));
681 static void dump_sample(struct perf_session *session, union perf_event *event,
682 struct perf_sample *sample)
687 printf("(IP, %d): %d/%d: %#" PRIx64 " period: %" PRIu64 "\n",
688 event->header.misc, sample->pid, sample->tid, sample->ip,
691 if (session->sample_type & PERF_SAMPLE_CALLCHAIN)
692 callchain__printf(sample);
695 static int perf_session_deliver_event(struct perf_session *session,
696 union perf_event *event,
697 struct perf_sample *sample,
698 struct perf_event_ops *ops,
701 dump_event(session, event, file_offset, sample);
703 switch (event->header.type) {
704 case PERF_RECORD_SAMPLE:
705 dump_sample(session, event, sample);
706 return ops->sample(event, sample, session);
707 case PERF_RECORD_MMAP:
708 return ops->mmap(event, sample, session);
709 case PERF_RECORD_COMM:
710 return ops->comm(event, sample, session);
711 case PERF_RECORD_FORK:
712 return ops->fork(event, sample, session);
713 case PERF_RECORD_EXIT:
714 return ops->exit(event, sample, session);
715 case PERF_RECORD_LOST:
716 return ops->lost(event, sample, session);
717 case PERF_RECORD_READ:
718 return ops->read(event, sample, session);
719 case PERF_RECORD_THROTTLE:
720 return ops->throttle(event, sample, session);
721 case PERF_RECORD_UNTHROTTLE:
722 return ops->unthrottle(event, sample, session);
724 ++session->hists.stats.nr_unknown_events;
729 static int perf_session__preprocess_sample(struct perf_session *session,
730 union perf_event *event, struct perf_sample *sample)
732 if (event->header.type != PERF_RECORD_SAMPLE ||
733 !(session->sample_type & PERF_SAMPLE_CALLCHAIN))
736 if (!ip_callchain__valid(sample->callchain, event)) {
737 pr_debug("call-chain problem with event, skipping it.\n");
738 ++session->hists.stats.nr_invalid_chains;
739 session->hists.stats.total_invalid_chains += sample->period;
745 static int perf_session__process_user_event(struct perf_session *session, union perf_event *event,
746 struct perf_event_ops *ops, u64 file_offset)
748 dump_event(session, event, file_offset, NULL);
750 /* These events are processed right away */
751 switch (event->header.type) {
752 case PERF_RECORD_HEADER_ATTR:
753 return ops->attr(event, session);
754 case PERF_RECORD_HEADER_EVENT_TYPE:
755 return ops->event_type(event, session);
756 case PERF_RECORD_HEADER_TRACING_DATA:
757 /* setup for reading amidst mmap */
758 lseek(session->fd, file_offset, SEEK_SET);
759 return ops->tracing_data(event, session);
760 case PERF_RECORD_HEADER_BUILD_ID:
761 return ops->build_id(event, session);
762 case PERF_RECORD_FINISHED_ROUND:
763 return ops->finished_round(event, session, ops);
769 static int perf_session__process_event(struct perf_session *session,
770 union perf_event *event,
771 struct perf_event_ops *ops,
774 struct perf_sample sample;
777 if (session->header.needs_swap &&
778 perf_event__swap_ops[event->header.type])
779 perf_event__swap_ops[event->header.type](event);
781 if (event->header.type >= PERF_RECORD_HEADER_MAX)
784 hists__inc_nr_events(&session->hists, event->header.type);
786 if (event->header.type >= PERF_RECORD_USER_TYPE_START)
787 return perf_session__process_user_event(session, event, ops, file_offset);
790 * For all kernel events we get the sample data
792 perf_session__parse_sample(session, event, &sample);
794 /* Preprocess sample records - precheck callchains */
795 if (perf_session__preprocess_sample(session, event, &sample))
798 if (ops->ordered_samples) {
799 ret = perf_session_queue_event(session, event, &sample,
805 return perf_session_deliver_event(session, event, &sample, ops,
809 void perf_event_header__bswap(struct perf_event_header *self)
811 self->type = bswap_32(self->type);
812 self->misc = bswap_16(self->misc);
813 self->size = bswap_16(self->size);
816 static struct thread *perf_session__register_idle_thread(struct perf_session *self)
818 struct thread *thread = perf_session__findnew(self, 0);
820 if (thread == NULL || thread__set_comm(thread, "swapper")) {
821 pr_err("problem inserting idle task.\n");
828 static void perf_session__warn_about_errors(const struct perf_session *session,
829 const struct perf_event_ops *ops)
831 if (ops->lost == perf_event__process_lost &&
832 session->hists.stats.total_lost != 0) {
833 ui__warning("Processed %" PRIu64 " events and LOST %" PRIu64
834 "!\n\nCheck IO/CPU overload!\n\n",
835 session->hists.stats.total_period,
836 session->hists.stats.total_lost);
839 if (session->hists.stats.nr_unknown_events != 0) {
840 ui__warning("Found %u unknown events!\n\n"
841 "Is this an older tool processing a perf.data "
842 "file generated by a more recent tool?\n\n"
843 "If that is not the case, consider "
844 "reporting to linux-kernel@vger.kernel.org.\n\n",
845 session->hists.stats.nr_unknown_events);
848 if (session->hists.stats.nr_invalid_chains != 0) {
849 ui__warning("Found invalid callchains!\n\n"
850 "%u out of %u events were discarded for this reason.\n\n"
851 "Consider reporting to linux-kernel@vger.kernel.org.\n\n",
852 session->hists.stats.nr_invalid_chains,
853 session->hists.stats.nr_events[PERF_RECORD_SAMPLE]);
857 #define session_done() (*(volatile int *)(&session_done))
858 volatile int session_done;
860 static int __perf_session__process_pipe_events(struct perf_session *self,
861 struct perf_event_ops *ops)
863 union perf_event event;
870 perf_event_ops__fill_defaults(ops);
874 err = readn(self->fd, &event, sizeof(struct perf_event_header));
879 pr_err("failed to read event header\n");
883 if (self->header.needs_swap)
884 perf_event_header__bswap(&event.header);
886 size = event.header.size;
891 p += sizeof(struct perf_event_header);
893 if (size - sizeof(struct perf_event_header)) {
894 err = readn(self->fd, p, size - sizeof(struct perf_event_header));
897 pr_err("unexpected end of event stream\n");
901 pr_err("failed to read event data\n");
907 (skip = perf_session__process_event(self, &event, ops, head)) < 0) {
908 dump_printf("%#" PRIx64 " [%#x]: skipping unknown header type: %d\n",
909 head, event.header.size, event.header.type);
911 * assume we lost track of the stream, check alignment, and
912 * increment a single u64 in the hope to catch on again 'soon'.
914 if (unlikely(head & 7))
930 perf_session__warn_about_errors(self, ops);
931 perf_session_free_sample_buffers(self);
935 int __perf_session__process_events(struct perf_session *session,
936 u64 data_offset, u64 data_size,
937 u64 file_size, struct perf_event_ops *ops)
939 u64 head, page_offset, file_offset, file_pos, progress_next;
940 int err, mmap_prot, mmap_flags, map_idx = 0;
941 struct ui_progress *progress;
942 size_t page_size, mmap_size;
943 char *buf, *mmaps[8];
944 union perf_event *event;
947 perf_event_ops__fill_defaults(ops);
949 page_size = sysconf(_SC_PAGESIZE);
951 page_offset = page_size * (data_offset / page_size);
952 file_offset = page_offset;
953 head = data_offset - page_offset;
955 if (data_offset + data_size < file_size)
956 file_size = data_offset + data_size;
958 progress_next = file_size / 16;
959 progress = ui_progress__new("Processing events...", file_size);
960 if (progress == NULL)
963 mmap_size = session->mmap_window;
964 if (mmap_size > file_size)
965 mmap_size = file_size;
967 memset(mmaps, 0, sizeof(mmaps));
969 mmap_prot = PROT_READ;
970 mmap_flags = MAP_SHARED;
972 if (session->header.needs_swap) {
973 mmap_prot |= PROT_WRITE;
974 mmap_flags = MAP_PRIVATE;
977 buf = mmap(NULL, mmap_size, mmap_prot, mmap_flags, session->fd,
979 if (buf == MAP_FAILED) {
980 pr_err("failed to mmap file\n");
984 mmaps[map_idx] = buf;
985 map_idx = (map_idx + 1) & (ARRAY_SIZE(mmaps) - 1);
986 file_pos = file_offset + head;
989 event = (union perf_event *)(buf + head);
991 if (session->header.needs_swap)
992 perf_event_header__bswap(&event->header);
993 size = event->header.size;
997 if (head + event->header.size > mmap_size) {
998 if (mmaps[map_idx]) {
999 munmap(mmaps[map_idx], mmap_size);
1000 mmaps[map_idx] = NULL;
1003 page_offset = page_size * (head / page_size);
1004 file_offset += page_offset;
1005 head -= page_offset;
1009 size = event->header.size;
1012 perf_session__process_event(session, event, ops, file_pos) < 0) {
1013 dump_printf("%#" PRIx64 " [%#x]: skipping unknown header type: %d\n",
1014 file_offset + head, event->header.size,
1015 event->header.type);
1017 * assume we lost track of the stream, check alignment, and
1018 * increment a single u64 in the hope to catch on again 'soon'.
1020 if (unlikely(head & 7))
1029 if (file_pos >= progress_next) {
1030 progress_next += file_size / 16;
1031 ui_progress__update(progress, file_pos);
1034 if (file_pos < file_size)
1038 /* do the final flush for ordered samples */
1039 session->ordered_samples.next_flush = ULLONG_MAX;
1040 flush_sample_queue(session, ops);
1042 ui_progress__delete(progress);
1043 perf_session__warn_about_errors(session, ops);
1044 perf_session_free_sample_buffers(session);
1048 int perf_session__process_events(struct perf_session *self,
1049 struct perf_event_ops *ops)
1053 if (perf_session__register_idle_thread(self) == NULL)
1057 err = __perf_session__process_events(self,
1058 self->header.data_offset,
1059 self->header.data_size,
1062 err = __perf_session__process_pipe_events(self, ops);
1067 bool perf_session__has_traces(struct perf_session *self, const char *msg)
1069 if (!(self->sample_type & PERF_SAMPLE_RAW)) {
1070 pr_err("No trace sample to read. Did you call 'perf %s'?\n", msg);
1077 int perf_session__set_kallsyms_ref_reloc_sym(struct map **maps,
1078 const char *symbol_name,
1083 struct ref_reloc_sym *ref;
1085 ref = zalloc(sizeof(struct ref_reloc_sym));
1089 ref->name = strdup(symbol_name);
1090 if (ref->name == NULL) {
1095 bracket = strchr(ref->name, ']');
1101 for (i = 0; i < MAP__NR_TYPES; ++i) {
1102 struct kmap *kmap = map__kmap(maps[i]);
1103 kmap->ref_reloc_sym = ref;
1109 size_t perf_session__fprintf_dsos(struct perf_session *self, FILE *fp)
1111 return __dsos__fprintf(&self->host_machine.kernel_dsos, fp) +
1112 __dsos__fprintf(&self->host_machine.user_dsos, fp) +
1113 machines__fprintf_dsos(&self->machines, fp);
1116 size_t perf_session__fprintf_dsos_buildid(struct perf_session *self, FILE *fp,
1119 size_t ret = machine__fprintf_dsos_buildid(&self->host_machine, fp, with_hits);
1120 return ret + machines__fprintf_dsos_buildid(&self->machines, fp, with_hits);
1123 size_t perf_session__fprintf_nr_events(struct perf_session *session, FILE *fp)
1125 struct perf_evsel *pos;
1126 size_t ret = fprintf(fp, "Aggregated stats:\n");
1128 ret += hists__fprintf_nr_events(&session->hists, fp);
1130 list_for_each_entry(pos, &session->evlist->entries, node) {
1131 ret += fprintf(fp, "%s stats:\n", event_name(pos));
1132 ret += hists__fprintf_nr_events(&pos->hists, fp);
1138 void perf_session__print_symbols(union perf_event *event,
1139 struct perf_sample *sample,
1140 struct perf_session *session)
1142 struct addr_location al;
1143 const char *symname, *dsoname;
1144 struct callchain_cursor *cursor = &session->callchain_cursor;
1145 struct callchain_cursor_node *node;
1147 if (perf_event__preprocess_sample(event, session, &al, sample,
1149 error("problem processing %d event, skipping it.\n",
1150 event->header.type);
1154 if (symbol_conf.use_callchain && sample->callchain) {
1156 if (perf_session__resolve_callchain(session, al.thread,
1157 sample->callchain, NULL) != 0) {
1159 error("Failed to resolve callchain. Skipping\n");
1162 callchain_cursor_commit(cursor);
1165 node = callchain_cursor_current(cursor);
1169 if (node->sym && node->sym->name)
1170 symname = node->sym->name;
1174 if (node->map && node->map->dso && node->map->dso->name)
1175 dsoname = node->map->dso->name;
1179 printf("\t%16" PRIx64 " %s (%s)\n", node->ip, symname, dsoname);
1181 callchain_cursor_advance(cursor);
1185 if (al.sym && al.sym->name)
1186 symname = al.sym->name;
1190 if (al.map && al.map->dso && al.map->dso->name)
1191 dsoname = al.map->dso->name;
1195 printf("%16" PRIx64 " %s (%s)", al.addr, symname, dsoname);