1 #define _FILE_OFFSET_BITS 64
3 #include <linux/kernel.h>
14 static int perf_session__open(struct perf_session *self, bool force)
16 struct stat input_stat;
18 if (!strcmp(self->filename, "-")) {
20 self->fd = STDIN_FILENO;
22 if (perf_header__read(self, self->fd) < 0)
23 pr_err("incompatible file format");
28 self->fd = open(self->filename, O_RDONLY);
32 pr_err("failed to open %s: %s", self->filename, strerror(err));
33 if (err == ENOENT && !strcmp(self->filename, "perf.data"))
34 pr_err(" (try 'perf record' first)");
39 if (fstat(self->fd, &input_stat) < 0)
42 if (!force && input_stat.st_uid && (input_stat.st_uid != geteuid())) {
43 pr_err("file %s not owned by current user or root\n",
48 if (!input_stat.st_size) {
49 pr_info("zero-sized file (%s), nothing to do!\n",
54 if (perf_header__read(self, self->fd) < 0) {
55 pr_err("incompatible file format");
59 self->size = input_stat.st_size;
68 static void perf_session__id_header_size(struct perf_session *session)
70 struct sample_data *data;
71 u64 sample_type = session->sample_type;
74 if (!session->sample_id_all)
77 if (sample_type & PERF_SAMPLE_TID)
78 size += sizeof(data->tid) * 2;
80 if (sample_type & PERF_SAMPLE_TIME)
81 size += sizeof(data->time);
83 if (sample_type & PERF_SAMPLE_ID)
84 size += sizeof(data->id);
86 if (sample_type & PERF_SAMPLE_STREAM_ID)
87 size += sizeof(data->stream_id);
89 if (sample_type & PERF_SAMPLE_CPU)
90 size += sizeof(data->cpu) * 2;
92 session->id_hdr_size = size;
95 void perf_session__set_sample_id_all(struct perf_session *session, bool value)
97 session->sample_id_all = value;
98 perf_session__id_header_size(session);
101 void perf_session__set_sample_type(struct perf_session *session, u64 type)
103 session->sample_type = type;
106 void perf_session__update_sample_type(struct perf_session *self)
108 self->sample_type = perf_header__sample_type(&self->header);
109 self->sample_id_all = perf_header__sample_id_all(&self->header);
110 perf_session__id_header_size(self);
113 int perf_session__create_kernel_maps(struct perf_session *self)
115 int ret = machine__create_kernel_maps(&self->host_machine);
118 ret = machines__create_guest_kernel_maps(&self->machines);
122 static void perf_session__destroy_kernel_maps(struct perf_session *self)
124 machine__destroy_kernel_maps(&self->host_machine);
125 machines__destroy_guest_kernel_maps(&self->machines);
128 struct perf_session *perf_session__new(const char *filename, int mode, bool force, bool repipe)
130 size_t len = filename ? strlen(filename) + 1 : 0;
131 struct perf_session *self = zalloc(sizeof(*self) + len);
136 if (perf_header__init(&self->header) < 0)
139 memcpy(self->filename, filename, len);
140 self->threads = RB_ROOT;
141 INIT_LIST_HEAD(&self->dead_threads);
142 self->hists_tree = RB_ROOT;
143 self->last_match = NULL;
145 * On 64bit we can mmap the data file in one go. No need for tiny mmap
146 * slices. On 32bit we use 32MB.
148 #if BITS_PER_LONG == 64
149 self->mmap_window = ULLONG_MAX;
151 self->mmap_window = 32 * 1024 * 1024ULL;
153 self->machines = RB_ROOT;
154 self->repipe = repipe;
155 INIT_LIST_HEAD(&self->ordered_samples.samples);
156 INIT_LIST_HEAD(&self->ordered_samples.sample_cache);
157 INIT_LIST_HEAD(&self->ordered_samples.to_free);
158 machine__init(&self->host_machine, "", HOST_KERNEL_ID);
160 if (mode == O_RDONLY) {
161 if (perf_session__open(self, force) < 0)
163 } else if (mode == O_WRONLY) {
165 * In O_RDONLY mode this will be performed when reading the
166 * kernel MMAP event, in event__process_mmap().
168 if (perf_session__create_kernel_maps(self) < 0)
172 perf_session__update_sample_type(self);
179 perf_session__delete(self);
183 static void perf_session__delete_dead_threads(struct perf_session *self)
185 struct thread *n, *t;
187 list_for_each_entry_safe(t, n, &self->dead_threads, node) {
193 static void perf_session__delete_threads(struct perf_session *self)
195 struct rb_node *nd = rb_first(&self->threads);
198 struct thread *t = rb_entry(nd, struct thread, rb_node);
200 rb_erase(&t->rb_node, &self->threads);
206 void perf_session__delete(struct perf_session *self)
208 perf_header__exit(&self->header);
209 perf_session__destroy_kernel_maps(self);
210 perf_session__delete_dead_threads(self);
211 perf_session__delete_threads(self);
212 machine__exit(&self->host_machine);
217 void perf_session__remove_thread(struct perf_session *self, struct thread *th)
219 self->last_match = NULL;
220 rb_erase(&th->rb_node, &self->threads);
222 * We may have references to this thread, for instance in some hist_entry
223 * instances, so just move them to a separate list.
225 list_add_tail(&th->node, &self->dead_threads);
228 static bool symbol__match_parent_regex(struct symbol *sym)
230 if (sym->name && !regexec(&parent_regex, sym->name, 0, NULL, 0))
236 struct map_symbol *perf_session__resolve_callchain(struct perf_session *self,
237 struct thread *thread,
238 struct ip_callchain *chain,
239 struct symbol **parent)
241 u8 cpumode = PERF_RECORD_MISC_USER;
243 struct map_symbol *syms = calloc(chain->nr, sizeof(*syms));
248 for (i = 0; i < chain->nr; i++) {
249 u64 ip = chain->ips[i];
250 struct addr_location al;
252 if (ip >= PERF_CONTEXT_MAX) {
254 case PERF_CONTEXT_HV:
255 cpumode = PERF_RECORD_MISC_HYPERVISOR; break;
256 case PERF_CONTEXT_KERNEL:
257 cpumode = PERF_RECORD_MISC_KERNEL; break;
258 case PERF_CONTEXT_USER:
259 cpumode = PERF_RECORD_MISC_USER; break;
267 thread__find_addr_location(thread, self, cpumode,
268 MAP__FUNCTION, thread->pid, ip, &al, NULL);
269 if (al.sym != NULL) {
270 if (sort__has_parent && !*parent &&
271 symbol__match_parent_regex(al.sym))
273 if (!symbol_conf.use_callchain)
275 syms[i].map = al.map;
276 syms[i].sym = al.sym;
283 static int process_event_synth_stub(event_t *event __used,
284 struct perf_session *session __used)
286 dump_printf(": unhandled!\n");
290 static int process_event_stub(event_t *event __used,
291 struct sample_data *sample __used,
292 struct perf_session *session __used)
294 dump_printf(": unhandled!\n");
298 static int process_finished_round_stub(event_t *event __used,
299 struct perf_session *session __used,
300 struct perf_event_ops *ops __used)
302 dump_printf(": unhandled!\n");
306 static int process_finished_round(event_t *event,
307 struct perf_session *session,
308 struct perf_event_ops *ops);
310 static void perf_event_ops__fill_defaults(struct perf_event_ops *handler)
312 if (handler->sample == NULL)
313 handler->sample = process_event_stub;
314 if (handler->mmap == NULL)
315 handler->mmap = process_event_stub;
316 if (handler->comm == NULL)
317 handler->comm = process_event_stub;
318 if (handler->fork == NULL)
319 handler->fork = process_event_stub;
320 if (handler->exit == NULL)
321 handler->exit = process_event_stub;
322 if (handler->lost == NULL)
323 handler->lost = event__process_lost;
324 if (handler->read == NULL)
325 handler->read = process_event_stub;
326 if (handler->throttle == NULL)
327 handler->throttle = process_event_stub;
328 if (handler->unthrottle == NULL)
329 handler->unthrottle = process_event_stub;
330 if (handler->attr == NULL)
331 handler->attr = process_event_synth_stub;
332 if (handler->event_type == NULL)
333 handler->event_type = process_event_synth_stub;
334 if (handler->tracing_data == NULL)
335 handler->tracing_data = process_event_synth_stub;
336 if (handler->build_id == NULL)
337 handler->build_id = process_event_synth_stub;
338 if (handler->finished_round == NULL) {
339 if (handler->ordered_samples)
340 handler->finished_round = process_finished_round;
342 handler->finished_round = process_finished_round_stub;
346 void mem_bswap_64(void *src, int byte_size)
350 while (byte_size > 0) {
352 byte_size -= sizeof(u64);
357 static void event__all64_swap(event_t *self)
359 struct perf_event_header *hdr = &self->header;
360 mem_bswap_64(hdr + 1, self->header.size - sizeof(*hdr));
363 static void event__comm_swap(event_t *self)
365 self->comm.pid = bswap_32(self->comm.pid);
366 self->comm.tid = bswap_32(self->comm.tid);
369 static void event__mmap_swap(event_t *self)
371 self->mmap.pid = bswap_32(self->mmap.pid);
372 self->mmap.tid = bswap_32(self->mmap.tid);
373 self->mmap.start = bswap_64(self->mmap.start);
374 self->mmap.len = bswap_64(self->mmap.len);
375 self->mmap.pgoff = bswap_64(self->mmap.pgoff);
378 static void event__task_swap(event_t *self)
380 self->fork.pid = bswap_32(self->fork.pid);
381 self->fork.tid = bswap_32(self->fork.tid);
382 self->fork.ppid = bswap_32(self->fork.ppid);
383 self->fork.ptid = bswap_32(self->fork.ptid);
384 self->fork.time = bswap_64(self->fork.time);
387 static void event__read_swap(event_t *self)
389 self->read.pid = bswap_32(self->read.pid);
390 self->read.tid = bswap_32(self->read.tid);
391 self->read.value = bswap_64(self->read.value);
392 self->read.time_enabled = bswap_64(self->read.time_enabled);
393 self->read.time_running = bswap_64(self->read.time_running);
394 self->read.id = bswap_64(self->read.id);
397 static void event__attr_swap(event_t *self)
401 self->attr.attr.type = bswap_32(self->attr.attr.type);
402 self->attr.attr.size = bswap_32(self->attr.attr.size);
403 self->attr.attr.config = bswap_64(self->attr.attr.config);
404 self->attr.attr.sample_period = bswap_64(self->attr.attr.sample_period);
405 self->attr.attr.sample_type = bswap_64(self->attr.attr.sample_type);
406 self->attr.attr.read_format = bswap_64(self->attr.attr.read_format);
407 self->attr.attr.wakeup_events = bswap_32(self->attr.attr.wakeup_events);
408 self->attr.attr.bp_type = bswap_32(self->attr.attr.bp_type);
409 self->attr.attr.bp_addr = bswap_64(self->attr.attr.bp_addr);
410 self->attr.attr.bp_len = bswap_64(self->attr.attr.bp_len);
412 size = self->header.size;
413 size -= (void *)&self->attr.id - (void *)self;
414 mem_bswap_64(self->attr.id, size);
417 static void event__event_type_swap(event_t *self)
419 self->event_type.event_type.event_id =
420 bswap_64(self->event_type.event_type.event_id);
423 static void event__tracing_data_swap(event_t *self)
425 self->tracing_data.size = bswap_32(self->tracing_data.size);
428 typedef void (*event__swap_op)(event_t *self);
430 static event__swap_op event__swap_ops[] = {
431 [PERF_RECORD_MMAP] = event__mmap_swap,
432 [PERF_RECORD_COMM] = event__comm_swap,
433 [PERF_RECORD_FORK] = event__task_swap,
434 [PERF_RECORD_EXIT] = event__task_swap,
435 [PERF_RECORD_LOST] = event__all64_swap,
436 [PERF_RECORD_READ] = event__read_swap,
437 [PERF_RECORD_SAMPLE] = event__all64_swap,
438 [PERF_RECORD_HEADER_ATTR] = event__attr_swap,
439 [PERF_RECORD_HEADER_EVENT_TYPE] = event__event_type_swap,
440 [PERF_RECORD_HEADER_TRACING_DATA] = event__tracing_data_swap,
441 [PERF_RECORD_HEADER_BUILD_ID] = NULL,
442 [PERF_RECORD_HEADER_MAX] = NULL,
445 struct sample_queue {
449 struct list_head list;
452 static void perf_session_free_sample_buffers(struct perf_session *session)
454 struct ordered_samples *os = &session->ordered_samples;
456 while (!list_empty(&os->to_free)) {
457 struct sample_queue *sq;
459 sq = list_entry(os->to_free.next, struct sample_queue, list);
465 static int perf_session_deliver_event(struct perf_session *session,
467 struct sample_data *sample,
468 struct perf_event_ops *ops,
471 static void flush_sample_queue(struct perf_session *s,
472 struct perf_event_ops *ops)
474 struct ordered_samples *os = &s->ordered_samples;
475 struct list_head *head = &os->samples;
476 struct sample_queue *tmp, *iter;
477 struct sample_data sample;
478 u64 limit = os->next_flush;
479 u64 last_ts = os->last_sample ? os->last_sample->timestamp : 0ULL;
481 if (!ops->ordered_samples || !limit)
484 list_for_each_entry_safe(iter, tmp, head, list) {
485 if (iter->timestamp > limit)
488 event__parse_sample(iter->event, s, &sample);
489 perf_session_deliver_event(s, iter->event, &sample, ops,
492 os->last_flush = iter->timestamp;
493 list_del(&iter->list);
494 list_add(&iter->list, &os->sample_cache);
497 if (list_empty(head)) {
498 os->last_sample = NULL;
499 } else if (last_ts <= limit) {
501 list_entry(head->prev, struct sample_queue, list);
506 * When perf record finishes a pass on every buffers, it records this pseudo
508 * We record the max timestamp t found in the pass n.
509 * Assuming these timestamps are monotonic across cpus, we know that if
510 * a buffer still has events with timestamps below t, they will be all
511 * available and then read in the pass n + 1.
512 * Hence when we start to read the pass n + 2, we can safely flush every
513 * events with timestamps below t.
515 * ============ PASS n =================
518 * cnt1 timestamps | cnt2 timestamps
521 * - | 4 <--- max recorded
523 * ============ PASS n + 1 ==============
526 * cnt1 timestamps | cnt2 timestamps
529 * 5 | 7 <---- max recorded
531 * Flush every events below timestamp 4
533 * ============ PASS n + 2 ==============
536 * cnt1 timestamps | cnt2 timestamps
541 * Flush every events below timestamp 7
544 static int process_finished_round(event_t *event __used,
545 struct perf_session *session,
546 struct perf_event_ops *ops)
548 flush_sample_queue(session, ops);
549 session->ordered_samples.next_flush = session->ordered_samples.max_timestamp;
554 /* The queue is ordered by time */
555 static void __queue_event(struct sample_queue *new, struct perf_session *s)
557 struct ordered_samples *os = &s->ordered_samples;
558 struct sample_queue *sample = os->last_sample;
559 u64 timestamp = new->timestamp;
562 os->last_sample = new;
565 list_add(&new->list, &os->samples);
566 os->max_timestamp = timestamp;
571 * last_sample might point to some random place in the list as it's
572 * the last queued event. We expect that the new event is close to
575 if (sample->timestamp <= timestamp) {
576 while (sample->timestamp <= timestamp) {
577 p = sample->list.next;
578 if (p == &os->samples) {
579 list_add_tail(&new->list, &os->samples);
580 os->max_timestamp = timestamp;
583 sample = list_entry(p, struct sample_queue, list);
585 list_add_tail(&new->list, &sample->list);
587 while (sample->timestamp > timestamp) {
588 p = sample->list.prev;
589 if (p == &os->samples) {
590 list_add(&new->list, &os->samples);
593 sample = list_entry(p, struct sample_queue, list);
595 list_add(&new->list, &sample->list);
599 #define MAX_SAMPLE_BUFFER (64 * 1024 / sizeof(struct sample_queue))
601 static int perf_session_queue_event(struct perf_session *s, event_t *event,
602 struct sample_data *data, u64 file_offset)
604 struct ordered_samples *os = &s->ordered_samples;
605 struct list_head *sc = &os->sample_cache;
606 u64 timestamp = data->time;
607 struct sample_queue *new;
609 if (!timestamp || timestamp == ~0ULL)
612 if (timestamp < s->ordered_samples.last_flush) {
613 printf("Warning: Timestamp below last timeslice flush\n");
617 if (!list_empty(sc)) {
618 new = list_entry(sc->next, struct sample_queue, list);
619 list_del(&new->list);
620 } else if (os->sample_buffer) {
621 new = os->sample_buffer + os->sample_buffer_idx;
622 if (++os->sample_buffer_idx == MAX_SAMPLE_BUFFER)
623 os->sample_buffer = NULL;
625 os->sample_buffer = malloc(MAX_SAMPLE_BUFFER * sizeof(*new));
626 if (!os->sample_buffer)
628 list_add(&os->sample_buffer->list, &os->to_free);
629 os->sample_buffer_idx = 2;
630 new = os->sample_buffer + 1;
633 new->timestamp = timestamp;
634 new->file_offset = file_offset;
637 __queue_event(new, s);
642 static void callchain__dump(struct sample_data *sample)
649 printf("... chain: nr:%Lu\n", sample->callchain->nr);
651 for (i = 0; i < sample->callchain->nr; i++)
652 printf("..... %2d: %016Lx\n", i, sample->callchain->ips[i]);
655 static void perf_session__print_tstamp(struct perf_session *session,
657 struct sample_data *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("%Lu ", sample->time);
672 static void dump_event(struct perf_session *session, event_t *event,
673 u64 file_offset, struct sample_data *sample)
678 dump_printf("\n%#Lx [%#x]: event: %d\n", file_offset,
679 event->header.size, event->header.type);
684 perf_session__print_tstamp(session, event, sample);
686 dump_printf("%#Lx [%#x]: PERF_RECORD_%s",
687 file_offset, event->header.size,
688 event__get_event_name(event->header.type));
691 static void dump_sample(struct perf_session *session, event_t *event,
692 struct sample_data *sample)
694 dump_printf("(IP, %d): %d/%d: %#Lx period: %Ld\n", event->header.misc,
695 sample->pid, sample->tid, sample->ip, sample->period);
697 if (session->sample_type & PERF_SAMPLE_CALLCHAIN)
698 callchain__dump(sample);
701 static int perf_session_deliver_event(struct perf_session *session,
703 struct sample_data *sample,
704 struct perf_event_ops *ops,
707 dump_event(session, event, file_offset, sample);
709 switch (event->header.type) {
710 case PERF_RECORD_SAMPLE:
711 dump_sample(session, event, sample);
712 return ops->sample(event, sample, session);
713 case PERF_RECORD_MMAP:
714 return ops->mmap(event, sample, session);
715 case PERF_RECORD_COMM:
716 return ops->comm(event, sample, session);
717 case PERF_RECORD_FORK:
718 return ops->fork(event, sample, session);
719 case PERF_RECORD_EXIT:
720 return ops->exit(event, sample, session);
721 case PERF_RECORD_LOST:
722 return ops->lost(event, sample, session);
723 case PERF_RECORD_READ:
724 return ops->read(event, sample, session);
725 case PERF_RECORD_THROTTLE:
726 return ops->throttle(event, sample, session);
727 case PERF_RECORD_UNTHROTTLE:
728 return ops->unthrottle(event, sample, session);
730 ++session->hists.stats.nr_unknown_events;
735 static int perf_session__preprocess_sample(struct perf_session *session,
736 event_t *event, struct sample_data *sample)
738 if (event->header.type != PERF_RECORD_SAMPLE ||
739 !(session->sample_type & PERF_SAMPLE_CALLCHAIN))
742 if (!ip_callchain__valid(sample->callchain, event)) {
743 pr_debug("call-chain problem with event, skipping it.\n");
744 ++session->hists.stats.nr_invalid_chains;
745 session->hists.stats.total_invalid_chains += sample->period;
751 static int perf_session__process_event(struct perf_session *session,
753 struct perf_event_ops *ops,
756 struct sample_data sample;
759 if (session->header.needs_swap && event__swap_ops[event->header.type])
760 event__swap_ops[event->header.type](event);
762 if (event->header.type >= PERF_RECORD_HEADER_MAX)
765 hists__inc_nr_events(&session->hists, event->header.type);
767 if (event->header.type >= PERF_RECORD_USER_TYPE_START)
768 dump_event(session, event, file_offset, NULL);
770 /* These events are processed right away */
771 switch (event->header.type) {
772 case PERF_RECORD_HEADER_ATTR:
773 return ops->attr(event, session);
774 case PERF_RECORD_HEADER_EVENT_TYPE:
775 return ops->event_type(event, session);
776 case PERF_RECORD_HEADER_TRACING_DATA:
777 /* setup for reading amidst mmap */
778 lseek(session->fd, file_offset, SEEK_SET);
779 return ops->tracing_data(event, session);
780 case PERF_RECORD_HEADER_BUILD_ID:
781 return ops->build_id(event, session);
782 case PERF_RECORD_FINISHED_ROUND:
783 return ops->finished_round(event, session, ops);
789 * For all kernel events we get the sample data
791 event__parse_sample(event, session, &sample);
793 /* Preprocess sample records - precheck callchains */
794 if (perf_session__preprocess_sample(session, event, &sample))
797 if (ops->ordered_samples) {
798 ret = perf_session_queue_event(session, event, &sample,
804 return perf_session_deliver_event(session, event, &sample, ops,
808 void perf_event_header__bswap(struct perf_event_header *self)
810 self->type = bswap_32(self->type);
811 self->misc = bswap_16(self->misc);
812 self->size = bswap_16(self->size);
815 static struct thread *perf_session__register_idle_thread(struct perf_session *self)
817 struct thread *thread = perf_session__findnew(self, 0);
819 if (thread == NULL || thread__set_comm(thread, "swapper")) {
820 pr_err("problem inserting idle task.\n");
827 int do_read(int fd, void *buf, size_t size)
829 void *buf_start = buf;
832 int ret = read(fd, buf, size);
841 return buf - buf_start;
844 #define session_done() (*(volatile int *)(&session_done))
845 volatile int session_done;
847 static int __perf_session__process_pipe_events(struct perf_session *self,
848 struct perf_event_ops *ops)
857 perf_event_ops__fill_defaults(ops);
861 err = do_read(self->fd, &event, sizeof(struct perf_event_header));
866 pr_err("failed to read event header\n");
870 if (self->header.needs_swap)
871 perf_event_header__bswap(&event.header);
873 size = event.header.size;
878 p += sizeof(struct perf_event_header);
880 if (size - sizeof(struct perf_event_header)) {
881 err = do_read(self->fd, p,
882 size - sizeof(struct perf_event_header));
885 pr_err("unexpected end of event stream\n");
889 pr_err("failed to read event data\n");
895 (skip = perf_session__process_event(self, &event, ops, head)) < 0) {
896 dump_printf("%#Lx [%#x]: skipping unknown header type: %d\n",
897 head, event.header.size, event.header.type);
899 * assume we lost track of the stream, check alignment, and
900 * increment a single u64 in the hope to catch on again 'soon'.
902 if (unlikely(head & 7))
918 perf_session_free_sample_buffers(self);
922 int __perf_session__process_events(struct perf_session *session,
923 u64 data_offset, u64 data_size,
924 u64 file_size, struct perf_event_ops *ops)
926 u64 head, page_offset, file_offset, file_pos, progress_next;
927 int err, mmap_prot, mmap_flags, map_idx = 0;
928 struct ui_progress *progress;
929 size_t page_size, mmap_size;
930 char *buf, *mmaps[8];
934 perf_event_ops__fill_defaults(ops);
936 page_size = sysconf(_SC_PAGESIZE);
938 page_offset = page_size * (data_offset / page_size);
939 file_offset = page_offset;
940 head = data_offset - page_offset;
942 if (data_offset + data_size < file_size)
943 file_size = data_offset + data_size;
945 progress_next = file_size / 16;
946 progress = ui_progress__new("Processing events...", file_size);
947 if (progress == NULL)
950 mmap_size = session->mmap_window;
951 if (mmap_size > file_size)
952 mmap_size = file_size;
954 memset(mmaps, 0, sizeof(mmaps));
956 mmap_prot = PROT_READ;
957 mmap_flags = MAP_SHARED;
959 if (session->header.needs_swap) {
960 mmap_prot |= PROT_WRITE;
961 mmap_flags = MAP_PRIVATE;
964 buf = mmap(NULL, mmap_size, mmap_prot, mmap_flags, session->fd,
966 if (buf == MAP_FAILED) {
967 pr_err("failed to mmap file\n");
971 mmaps[map_idx] = buf;
972 map_idx = (map_idx + 1) & (ARRAY_SIZE(mmaps) - 1);
973 file_pos = file_offset + head;
976 event = (event_t *)(buf + head);
978 if (session->header.needs_swap)
979 perf_event_header__bswap(&event->header);
980 size = event->header.size;
984 if (head + event->header.size >= mmap_size) {
985 if (mmaps[map_idx]) {
986 munmap(mmaps[map_idx], mmap_size);
987 mmaps[map_idx] = NULL;
990 page_offset = page_size * (head / page_size);
991 file_offset += page_offset;
996 size = event->header.size;
999 perf_session__process_event(session, event, ops, file_pos) < 0) {
1000 dump_printf("%#Lx [%#x]: skipping unknown header type: %d\n",
1001 file_offset + head, event->header.size,
1002 event->header.type);
1004 * assume we lost track of the stream, check alignment, and
1005 * increment a single u64 in the hope to catch on again 'soon'.
1007 if (unlikely(head & 7))
1016 if (file_pos >= progress_next) {
1017 progress_next += file_size / 16;
1018 ui_progress__update(progress, file_pos);
1021 if (file_pos < file_size)
1025 /* do the final flush for ordered samples */
1026 session->ordered_samples.next_flush = ULLONG_MAX;
1027 flush_sample_queue(session, ops);
1029 ui_progress__delete(progress);
1031 if (ops->lost == event__process_lost &&
1032 session->hists.stats.total_lost != 0) {
1033 ui__warning("Processed %Lu events and LOST %Lu!\n\n"
1034 "Check IO/CPU overload!\n\n",
1035 session->hists.stats.total_period,
1036 session->hists.stats.total_lost);
1039 if (session->hists.stats.nr_unknown_events != 0) {
1040 ui__warning("Found %u unknown events!\n\n"
1041 "Is this an older tool processing a perf.data "
1042 "file generated by a more recent tool?\n\n"
1043 "If that is not the case, consider "
1044 "reporting to linux-kernel@vger.kernel.org.\n\n",
1045 session->hists.stats.nr_unknown_events);
1048 if (session->hists.stats.nr_invalid_chains != 0) {
1049 ui__warning("Found invalid callchains!\n\n"
1050 "%u out of %u events were discarded for this reason.\n\n"
1051 "Consider reporting to linux-kernel@vger.kernel.org.\n\n",
1052 session->hists.stats.nr_invalid_chains,
1053 session->hists.stats.nr_events[PERF_RECORD_SAMPLE]);
1056 perf_session_free_sample_buffers(session);
1060 int perf_session__process_events(struct perf_session *self,
1061 struct perf_event_ops *ops)
1065 if (perf_session__register_idle_thread(self) == NULL)
1069 err = __perf_session__process_events(self,
1070 self->header.data_offset,
1071 self->header.data_size,
1074 err = __perf_session__process_pipe_events(self, ops);
1079 bool perf_session__has_traces(struct perf_session *self, const char *msg)
1081 if (!(self->sample_type & PERF_SAMPLE_RAW)) {
1082 pr_err("No trace sample to read. Did you call 'perf %s'?\n", msg);
1089 int perf_session__set_kallsyms_ref_reloc_sym(struct map **maps,
1090 const char *symbol_name,
1095 struct ref_reloc_sym *ref;
1097 ref = zalloc(sizeof(struct ref_reloc_sym));
1101 ref->name = strdup(symbol_name);
1102 if (ref->name == NULL) {
1107 bracket = strchr(ref->name, ']');
1113 for (i = 0; i < MAP__NR_TYPES; ++i) {
1114 struct kmap *kmap = map__kmap(maps[i]);
1115 kmap->ref_reloc_sym = ref;
1121 size_t perf_session__fprintf_dsos(struct perf_session *self, FILE *fp)
1123 return __dsos__fprintf(&self->host_machine.kernel_dsos, fp) +
1124 __dsos__fprintf(&self->host_machine.user_dsos, fp) +
1125 machines__fprintf_dsos(&self->machines, fp);
1128 size_t perf_session__fprintf_dsos_buildid(struct perf_session *self, FILE *fp,
1131 size_t ret = machine__fprintf_dsos_buildid(&self->host_machine, fp, with_hits);
1132 return ret + machines__fprintf_dsos_buildid(&self->machines, fp, with_hits);