1 #include <linux/kernel.h>
2 #include <traceevent/event-parse.h>
16 #include "perf_regs.h"
19 static int perf_session__open(struct perf_session *session)
21 struct perf_data_file *file = session->file;
23 if (perf_session__read_header(session) < 0) {
24 pr_err("incompatible file format (rerun with -v to learn more)");
28 if (perf_data_file__is_pipe(file))
31 if (!perf_evlist__valid_sample_type(session->evlist)) {
32 pr_err("non matching sample_type");
36 if (!perf_evlist__valid_sample_id_all(session->evlist)) {
37 pr_err("non matching sample_id_all");
41 if (!perf_evlist__valid_read_format(session->evlist)) {
42 pr_err("non matching read_format");
49 void perf_session__set_id_hdr_size(struct perf_session *session)
51 u16 id_hdr_size = perf_evlist__id_hdr_size(session->evlist);
53 machines__set_id_hdr_size(&session->machines, id_hdr_size);
56 int perf_session__create_kernel_maps(struct perf_session *session)
58 int ret = machine__create_kernel_maps(&session->machines.host);
61 ret = machines__create_guest_kernel_maps(&session->machines);
65 static void perf_session__destroy_kernel_maps(struct perf_session *session)
67 machines__destroy_kernel_maps(&session->machines);
70 static bool perf_session__has_comm_exec(struct perf_session *session)
72 struct perf_evsel *evsel;
74 evlist__for_each(session->evlist, evsel) {
75 if (evsel->attr.comm_exec)
82 static void perf_session__set_comm_exec(struct perf_session *session)
84 bool comm_exec = perf_session__has_comm_exec(session);
86 machines__set_comm_exec(&session->machines, comm_exec);
89 struct perf_session *perf_session__new(struct perf_data_file *file,
90 bool repipe, struct perf_tool *tool)
92 struct perf_session *session = zalloc(sizeof(*session));
97 session->repipe = repipe;
98 ordered_events__init(&session->ordered_events);
99 machines__init(&session->machines);
102 if (perf_data_file__open(file))
105 session->file = file;
107 if (perf_data_file__is_read(file)) {
108 if (perf_session__open(session) < 0)
111 perf_session__set_id_hdr_size(session);
112 perf_session__set_comm_exec(session);
116 if (!file || perf_data_file__is_write(file)) {
118 * In O_RDONLY mode this will be performed when reading the
119 * kernel MMAP event, in perf_event__process_mmap().
121 if (perf_session__create_kernel_maps(session) < 0)
122 pr_warning("Cannot read kernel map\n");
125 if (tool && tool->ordering_requires_timestamps &&
126 tool->ordered_events && !perf_evlist__sample_id_all(session->evlist)) {
127 dump_printf("WARNING: No sample_id_all support, falling back to unordered processing\n");
128 tool->ordered_events = false;
134 perf_data_file__close(file);
136 perf_session__delete(session);
141 static void perf_session__delete_dead_threads(struct perf_session *session)
143 machine__delete_dead_threads(&session->machines.host);
146 static void perf_session__delete_threads(struct perf_session *session)
148 machine__delete_threads(&session->machines.host);
151 static void perf_session_env__delete(struct perf_session_env *env)
153 zfree(&env->hostname);
154 zfree(&env->os_release);
155 zfree(&env->version);
157 zfree(&env->cpu_desc);
160 zfree(&env->cmdline);
161 zfree(&env->sibling_cores);
162 zfree(&env->sibling_threads);
163 zfree(&env->numa_nodes);
164 zfree(&env->pmu_mappings);
167 void perf_session__delete(struct perf_session *session)
169 perf_session__destroy_kernel_maps(session);
170 perf_session__delete_dead_threads(session);
171 perf_session__delete_threads(session);
172 perf_session_env__delete(&session->header.env);
173 machines__exit(&session->machines);
175 perf_data_file__close(session->file);
179 static int process_event_synth_tracing_data_stub(struct perf_tool *tool
181 union perf_event *event
183 struct perf_session *session
186 dump_printf(": unhandled!\n");
190 static int process_event_synth_attr_stub(struct perf_tool *tool __maybe_unused,
191 union perf_event *event __maybe_unused,
192 struct perf_evlist **pevlist
195 dump_printf(": unhandled!\n");
199 static int process_event_sample_stub(struct perf_tool *tool __maybe_unused,
200 union perf_event *event __maybe_unused,
201 struct perf_sample *sample __maybe_unused,
202 struct perf_evsel *evsel __maybe_unused,
203 struct machine *machine __maybe_unused)
205 dump_printf(": unhandled!\n");
209 static int process_event_stub(struct perf_tool *tool __maybe_unused,
210 union perf_event *event __maybe_unused,
211 struct perf_sample *sample __maybe_unused,
212 struct machine *machine __maybe_unused)
214 dump_printf(": unhandled!\n");
218 static int process_finished_round_stub(struct perf_tool *tool __maybe_unused,
219 union perf_event *event __maybe_unused,
220 struct perf_session *perf_session
223 dump_printf(": unhandled!\n");
227 static int process_finished_round(struct perf_tool *tool,
228 union perf_event *event,
229 struct perf_session *session);
231 static int process_id_index_stub(struct perf_tool *tool __maybe_unused,
232 union perf_event *event __maybe_unused,
233 struct perf_session *perf_session
236 dump_printf(": unhandled!\n");
240 void perf_tool__fill_defaults(struct perf_tool *tool)
242 if (tool->sample == NULL)
243 tool->sample = process_event_sample_stub;
244 if (tool->mmap == NULL)
245 tool->mmap = process_event_stub;
246 if (tool->mmap2 == NULL)
247 tool->mmap2 = process_event_stub;
248 if (tool->comm == NULL)
249 tool->comm = process_event_stub;
250 if (tool->fork == NULL)
251 tool->fork = process_event_stub;
252 if (tool->exit == NULL)
253 tool->exit = process_event_stub;
254 if (tool->lost == NULL)
255 tool->lost = perf_event__process_lost;
256 if (tool->read == NULL)
257 tool->read = process_event_sample_stub;
258 if (tool->throttle == NULL)
259 tool->throttle = process_event_stub;
260 if (tool->unthrottle == NULL)
261 tool->unthrottle = process_event_stub;
262 if (tool->attr == NULL)
263 tool->attr = process_event_synth_attr_stub;
264 if (tool->tracing_data == NULL)
265 tool->tracing_data = process_event_synth_tracing_data_stub;
266 if (tool->build_id == NULL)
267 tool->build_id = process_finished_round_stub;
268 if (tool->finished_round == NULL) {
269 if (tool->ordered_events)
270 tool->finished_round = process_finished_round;
272 tool->finished_round = process_finished_round_stub;
274 if (tool->id_index == NULL)
275 tool->id_index = process_id_index_stub;
278 static void swap_sample_id_all(union perf_event *event, void *data)
280 void *end = (void *) event + event->header.size;
281 int size = end - data;
283 BUG_ON(size % sizeof(u64));
284 mem_bswap_64(data, size);
287 static void perf_event__all64_swap(union perf_event *event,
288 bool sample_id_all __maybe_unused)
290 struct perf_event_header *hdr = &event->header;
291 mem_bswap_64(hdr + 1, event->header.size - sizeof(*hdr));
294 static void perf_event__comm_swap(union perf_event *event, bool sample_id_all)
296 event->comm.pid = bswap_32(event->comm.pid);
297 event->comm.tid = bswap_32(event->comm.tid);
300 void *data = &event->comm.comm;
302 data += PERF_ALIGN(strlen(data) + 1, sizeof(u64));
303 swap_sample_id_all(event, data);
307 static void perf_event__mmap_swap(union perf_event *event,
310 event->mmap.pid = bswap_32(event->mmap.pid);
311 event->mmap.tid = bswap_32(event->mmap.tid);
312 event->mmap.start = bswap_64(event->mmap.start);
313 event->mmap.len = bswap_64(event->mmap.len);
314 event->mmap.pgoff = bswap_64(event->mmap.pgoff);
317 void *data = &event->mmap.filename;
319 data += PERF_ALIGN(strlen(data) + 1, sizeof(u64));
320 swap_sample_id_all(event, data);
324 static void perf_event__mmap2_swap(union perf_event *event,
327 event->mmap2.pid = bswap_32(event->mmap2.pid);
328 event->mmap2.tid = bswap_32(event->mmap2.tid);
329 event->mmap2.start = bswap_64(event->mmap2.start);
330 event->mmap2.len = bswap_64(event->mmap2.len);
331 event->mmap2.pgoff = bswap_64(event->mmap2.pgoff);
332 event->mmap2.maj = bswap_32(event->mmap2.maj);
333 event->mmap2.min = bswap_32(event->mmap2.min);
334 event->mmap2.ino = bswap_64(event->mmap2.ino);
337 void *data = &event->mmap2.filename;
339 data += PERF_ALIGN(strlen(data) + 1, sizeof(u64));
340 swap_sample_id_all(event, data);
343 static void perf_event__task_swap(union perf_event *event, bool sample_id_all)
345 event->fork.pid = bswap_32(event->fork.pid);
346 event->fork.tid = bswap_32(event->fork.tid);
347 event->fork.ppid = bswap_32(event->fork.ppid);
348 event->fork.ptid = bswap_32(event->fork.ptid);
349 event->fork.time = bswap_64(event->fork.time);
352 swap_sample_id_all(event, &event->fork + 1);
355 static void perf_event__read_swap(union perf_event *event, bool sample_id_all)
357 event->read.pid = bswap_32(event->read.pid);
358 event->read.tid = bswap_32(event->read.tid);
359 event->read.value = bswap_64(event->read.value);
360 event->read.time_enabled = bswap_64(event->read.time_enabled);
361 event->read.time_running = bswap_64(event->read.time_running);
362 event->read.id = bswap_64(event->read.id);
365 swap_sample_id_all(event, &event->read + 1);
368 static void perf_event__throttle_swap(union perf_event *event,
371 event->throttle.time = bswap_64(event->throttle.time);
372 event->throttle.id = bswap_64(event->throttle.id);
373 event->throttle.stream_id = bswap_64(event->throttle.stream_id);
376 swap_sample_id_all(event, &event->throttle + 1);
379 static u8 revbyte(u8 b)
381 int rev = (b >> 4) | ((b & 0xf) << 4);
382 rev = ((rev & 0xcc) >> 2) | ((rev & 0x33) << 2);
383 rev = ((rev & 0xaa) >> 1) | ((rev & 0x55) << 1);
388 * XXX this is hack in attempt to carry flags bitfield
389 * throught endian village. ABI says:
391 * Bit-fields are allocated from right to left (least to most significant)
392 * on little-endian implementations and from left to right (most to least
393 * significant) on big-endian implementations.
395 * The above seems to be byte specific, so we need to reverse each
396 * byte of the bitfield. 'Internet' also says this might be implementation
397 * specific and we probably need proper fix and carry perf_event_attr
398 * bitfield flags in separate data file FEAT_ section. Thought this seems
401 static void swap_bitfield(u8 *p, unsigned len)
405 for (i = 0; i < len; i++) {
411 /* exported for swapping attributes in file header */
412 void perf_event__attr_swap(struct perf_event_attr *attr)
414 attr->type = bswap_32(attr->type);
415 attr->size = bswap_32(attr->size);
416 attr->config = bswap_64(attr->config);
417 attr->sample_period = bswap_64(attr->sample_period);
418 attr->sample_type = bswap_64(attr->sample_type);
419 attr->read_format = bswap_64(attr->read_format);
420 attr->wakeup_events = bswap_32(attr->wakeup_events);
421 attr->bp_type = bswap_32(attr->bp_type);
422 attr->bp_addr = bswap_64(attr->bp_addr);
423 attr->bp_len = bswap_64(attr->bp_len);
424 attr->branch_sample_type = bswap_64(attr->branch_sample_type);
425 attr->sample_regs_user = bswap_64(attr->sample_regs_user);
426 attr->sample_stack_user = bswap_32(attr->sample_stack_user);
428 swap_bitfield((u8 *) (&attr->read_format + 1), sizeof(u64));
431 static void perf_event__hdr_attr_swap(union perf_event *event,
432 bool sample_id_all __maybe_unused)
436 perf_event__attr_swap(&event->attr.attr);
438 size = event->header.size;
439 size -= (void *)&event->attr.id - (void *)event;
440 mem_bswap_64(event->attr.id, size);
443 static void perf_event__event_type_swap(union perf_event *event,
444 bool sample_id_all __maybe_unused)
446 event->event_type.event_type.event_id =
447 bswap_64(event->event_type.event_type.event_id);
450 static void perf_event__tracing_data_swap(union perf_event *event,
451 bool sample_id_all __maybe_unused)
453 event->tracing_data.size = bswap_32(event->tracing_data.size);
456 typedef void (*perf_event__swap_op)(union perf_event *event,
459 static perf_event__swap_op perf_event__swap_ops[] = {
460 [PERF_RECORD_MMAP] = perf_event__mmap_swap,
461 [PERF_RECORD_MMAP2] = perf_event__mmap2_swap,
462 [PERF_RECORD_COMM] = perf_event__comm_swap,
463 [PERF_RECORD_FORK] = perf_event__task_swap,
464 [PERF_RECORD_EXIT] = perf_event__task_swap,
465 [PERF_RECORD_LOST] = perf_event__all64_swap,
466 [PERF_RECORD_READ] = perf_event__read_swap,
467 [PERF_RECORD_THROTTLE] = perf_event__throttle_swap,
468 [PERF_RECORD_UNTHROTTLE] = perf_event__throttle_swap,
469 [PERF_RECORD_SAMPLE] = perf_event__all64_swap,
470 [PERF_RECORD_HEADER_ATTR] = perf_event__hdr_attr_swap,
471 [PERF_RECORD_HEADER_EVENT_TYPE] = perf_event__event_type_swap,
472 [PERF_RECORD_HEADER_TRACING_DATA] = perf_event__tracing_data_swap,
473 [PERF_RECORD_HEADER_BUILD_ID] = NULL,
474 [PERF_RECORD_ID_INDEX] = perf_event__all64_swap,
475 [PERF_RECORD_HEADER_MAX] = NULL,
479 * When perf record finishes a pass on every buffers, it records this pseudo
481 * We record the max timestamp t found in the pass n.
482 * Assuming these timestamps are monotonic across cpus, we know that if
483 * a buffer still has events with timestamps below t, they will be all
484 * available and then read in the pass n + 1.
485 * Hence when we start to read the pass n + 2, we can safely flush every
486 * events with timestamps below t.
488 * ============ PASS n =================
491 * cnt1 timestamps | cnt2 timestamps
494 * - | 4 <--- max recorded
496 * ============ PASS n + 1 ==============
499 * cnt1 timestamps | cnt2 timestamps
502 * 5 | 7 <---- max recorded
504 * Flush every events below timestamp 4
506 * ============ PASS n + 2 ==============
509 * cnt1 timestamps | cnt2 timestamps
514 * Flush every events below timestamp 7
517 static int process_finished_round(struct perf_tool *tool,
518 union perf_event *event __maybe_unused,
519 struct perf_session *session)
521 return ordered_events__flush(session, tool, OE_FLUSH__ROUND);
524 int perf_session_queue_event(struct perf_session *s, union perf_event *event,
525 struct perf_tool *tool, struct perf_sample *sample,
528 struct ordered_events *oe = &s->ordered_events;
529 u64 timestamp = sample->time;
530 struct ordered_event *new;
532 if (!timestamp || timestamp == ~0ULL)
535 if (timestamp < oe->last_flush) {
536 WARN_ONCE(1, "Timestamp below last timeslice flush\n");
538 pr_oe_time(timestamp, "out of order event");
539 pr_oe_time(oe->last_flush, "last flush, last_flush_type %d\n",
540 oe->last_flush_type);
542 /* We could get out of order messages after forced flush. */
543 if (oe->last_flush_type != OE_FLUSH__HALF)
547 new = ordered_events__new(oe, timestamp, event);
549 ordered_events__flush(s, tool, OE_FLUSH__HALF);
550 new = ordered_events__new(oe, timestamp, event);
556 new->file_offset = file_offset;
560 static void callchain__printf(struct perf_sample *sample)
564 printf("... chain: nr:%" PRIu64 "\n", sample->callchain->nr);
566 for (i = 0; i < sample->callchain->nr; i++)
567 printf("..... %2d: %016" PRIx64 "\n",
568 i, sample->callchain->ips[i]);
571 static void branch_stack__printf(struct perf_sample *sample)
575 printf("... branch stack: nr:%" PRIu64 "\n", sample->branch_stack->nr);
577 for (i = 0; i < sample->branch_stack->nr; i++)
578 printf("..... %2"PRIu64": %016" PRIx64 " -> %016" PRIx64 "\n",
579 i, sample->branch_stack->entries[i].from,
580 sample->branch_stack->entries[i].to);
583 static void regs_dump__printf(u64 mask, u64 *regs)
587 for_each_set_bit(rid, (unsigned long *) &mask, sizeof(mask) * 8) {
590 printf(".... %-5s 0x%" PRIx64 "\n",
591 perf_reg_name(rid), val);
595 static void regs_user__printf(struct perf_sample *sample)
597 struct regs_dump *user_regs = &sample->user_regs;
599 if (user_regs->regs) {
600 u64 mask = user_regs->mask;
601 printf("... user regs: mask 0x%" PRIx64 "\n", mask);
602 regs_dump__printf(mask, user_regs->regs);
606 static void stack_user__printf(struct stack_dump *dump)
608 printf("... ustack: size %" PRIu64 ", offset 0x%x\n",
609 dump->size, dump->offset);
612 static void perf_session__print_tstamp(struct perf_session *session,
613 union perf_event *event,
614 struct perf_sample *sample)
616 u64 sample_type = __perf_evlist__combined_sample_type(session->evlist);
618 if (event->header.type != PERF_RECORD_SAMPLE &&
619 !perf_evlist__sample_id_all(session->evlist)) {
620 fputs("-1 -1 ", stdout);
624 if ((sample_type & PERF_SAMPLE_CPU))
625 printf("%u ", sample->cpu);
627 if (sample_type & PERF_SAMPLE_TIME)
628 printf("%" PRIu64 " ", sample->time);
631 static void sample_read__printf(struct perf_sample *sample, u64 read_format)
633 printf("... sample_read:\n");
635 if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED)
636 printf("...... time enabled %016" PRIx64 "\n",
637 sample->read.time_enabled);
639 if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING)
640 printf("...... time running %016" PRIx64 "\n",
641 sample->read.time_running);
643 if (read_format & PERF_FORMAT_GROUP) {
646 printf(".... group nr %" PRIu64 "\n", sample->read.group.nr);
648 for (i = 0; i < sample->read.group.nr; i++) {
649 struct sample_read_value *value;
651 value = &sample->read.group.values[i];
652 printf("..... id %016" PRIx64
653 ", value %016" PRIx64 "\n",
654 value->id, value->value);
657 printf("..... id %016" PRIx64 ", value %016" PRIx64 "\n",
658 sample->read.one.id, sample->read.one.value);
661 static void dump_event(struct perf_session *session, union perf_event *event,
662 u64 file_offset, struct perf_sample *sample)
667 printf("\n%#" PRIx64 " [%#x]: event: %d\n",
668 file_offset, event->header.size, event->header.type);
673 perf_session__print_tstamp(session, event, sample);
675 printf("%#" PRIx64 " [%#x]: PERF_RECORD_%s", file_offset,
676 event->header.size, perf_event__name(event->header.type));
679 static void dump_sample(struct perf_evsel *evsel, union perf_event *event,
680 struct perf_sample *sample)
687 printf("(IP, 0x%x): %d/%d: %#" PRIx64 " period: %" PRIu64 " addr: %#" PRIx64 "\n",
688 event->header.misc, sample->pid, sample->tid, sample->ip,
689 sample->period, sample->addr);
691 sample_type = evsel->attr.sample_type;
693 if (sample_type & PERF_SAMPLE_CALLCHAIN)
694 callchain__printf(sample);
696 if (sample_type & PERF_SAMPLE_BRANCH_STACK)
697 branch_stack__printf(sample);
699 if (sample_type & PERF_SAMPLE_REGS_USER)
700 regs_user__printf(sample);
702 if (sample_type & PERF_SAMPLE_STACK_USER)
703 stack_user__printf(&sample->user_stack);
705 if (sample_type & PERF_SAMPLE_WEIGHT)
706 printf("... weight: %" PRIu64 "\n", sample->weight);
708 if (sample_type & PERF_SAMPLE_DATA_SRC)
709 printf(" . data_src: 0x%"PRIx64"\n", sample->data_src);
711 if (sample_type & PERF_SAMPLE_TRANSACTION)
712 printf("... transaction: %" PRIx64 "\n", sample->transaction);
714 if (sample_type & PERF_SAMPLE_READ)
715 sample_read__printf(sample, evsel->attr.read_format);
718 static struct machine *
719 perf_session__find_machine_for_cpumode(struct perf_session *session,
720 union perf_event *event,
721 struct perf_sample *sample)
723 const u8 cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK;
724 struct machine *machine;
727 ((cpumode == PERF_RECORD_MISC_GUEST_KERNEL) ||
728 (cpumode == PERF_RECORD_MISC_GUEST_USER))) {
731 if (event->header.type == PERF_RECORD_MMAP
732 || event->header.type == PERF_RECORD_MMAP2)
733 pid = event->mmap.pid;
737 machine = perf_session__find_machine(session, pid);
739 machine = perf_session__findnew_machine(session,
740 DEFAULT_GUEST_KERNEL_ID);
744 return &session->machines.host;
747 static int deliver_sample_value(struct perf_session *session,
748 struct perf_tool *tool,
749 union perf_event *event,
750 struct perf_sample *sample,
751 struct sample_read_value *v,
752 struct machine *machine)
754 struct perf_sample_id *sid;
756 sid = perf_evlist__id2sid(session->evlist, v->id);
759 sample->period = v->value - sid->period;
760 sid->period = v->value;
763 if (!sid || sid->evsel == NULL) {
764 ++session->stats.nr_unknown_id;
768 return tool->sample(tool, event, sample, sid->evsel, machine);
771 static int deliver_sample_group(struct perf_session *session,
772 struct perf_tool *tool,
773 union perf_event *event,
774 struct perf_sample *sample,
775 struct machine *machine)
780 for (i = 0; i < sample->read.group.nr; i++) {
781 ret = deliver_sample_value(session, tool, event, sample,
782 &sample->read.group.values[i],
792 perf_session__deliver_sample(struct perf_session *session,
793 struct perf_tool *tool,
794 union perf_event *event,
795 struct perf_sample *sample,
796 struct perf_evsel *evsel,
797 struct machine *machine)
799 /* We know evsel != NULL. */
800 u64 sample_type = evsel->attr.sample_type;
801 u64 read_format = evsel->attr.read_format;
803 /* Standard sample delievery. */
804 if (!(sample_type & PERF_SAMPLE_READ))
805 return tool->sample(tool, event, sample, evsel, machine);
807 /* For PERF_SAMPLE_READ we have either single or group mode. */
808 if (read_format & PERF_FORMAT_GROUP)
809 return deliver_sample_group(session, tool, event, sample,
812 return deliver_sample_value(session, tool, event, sample,
813 &sample->read.one, machine);
816 int perf_session__deliver_event(struct perf_session *session,
817 union perf_event *event,
818 struct perf_sample *sample,
819 struct perf_tool *tool, u64 file_offset)
821 struct perf_evsel *evsel;
822 struct machine *machine;
824 dump_event(session, event, file_offset, sample);
826 evsel = perf_evlist__id2evsel(session->evlist, sample->id);
828 machine = perf_session__find_machine_for_cpumode(session, event,
831 switch (event->header.type) {
832 case PERF_RECORD_SAMPLE:
833 dump_sample(evsel, event, sample);
835 ++session->stats.nr_unknown_id;
838 if (machine == NULL) {
839 ++session->stats.nr_unprocessable_samples;
842 return perf_session__deliver_sample(session, tool, event,
843 sample, evsel, machine);
844 case PERF_RECORD_MMAP:
845 return tool->mmap(tool, event, sample, machine);
846 case PERF_RECORD_MMAP2:
847 return tool->mmap2(tool, event, sample, machine);
848 case PERF_RECORD_COMM:
849 return tool->comm(tool, event, sample, machine);
850 case PERF_RECORD_FORK:
851 return tool->fork(tool, event, sample, machine);
852 case PERF_RECORD_EXIT:
853 return tool->exit(tool, event, sample, machine);
854 case PERF_RECORD_LOST:
855 if (tool->lost == perf_event__process_lost)
856 session->stats.total_lost += event->lost.lost;
857 return tool->lost(tool, event, sample, machine);
858 case PERF_RECORD_READ:
859 return tool->read(tool, event, sample, evsel, machine);
860 case PERF_RECORD_THROTTLE:
861 return tool->throttle(tool, event, sample, machine);
862 case PERF_RECORD_UNTHROTTLE:
863 return tool->unthrottle(tool, event, sample, machine);
865 ++session->stats.nr_unknown_events;
870 static s64 perf_session__process_user_event(struct perf_session *session,
871 union perf_event *event,
872 struct perf_tool *tool,
875 int fd = perf_data_file__fd(session->file);
878 dump_event(session, event, file_offset, NULL);
880 /* These events are processed right away */
881 switch (event->header.type) {
882 case PERF_RECORD_HEADER_ATTR:
883 err = tool->attr(tool, event, &session->evlist);
885 perf_session__set_id_hdr_size(session);
886 perf_session__set_comm_exec(session);
889 case PERF_RECORD_HEADER_EVENT_TYPE:
891 * Depreceated, but we need to handle it for sake
892 * of old data files create in pipe mode.
895 case PERF_RECORD_HEADER_TRACING_DATA:
896 /* setup for reading amidst mmap */
897 lseek(fd, file_offset, SEEK_SET);
898 return tool->tracing_data(tool, event, session);
899 case PERF_RECORD_HEADER_BUILD_ID:
900 return tool->build_id(tool, event, session);
901 case PERF_RECORD_FINISHED_ROUND:
902 return tool->finished_round(tool, event, session);
903 case PERF_RECORD_ID_INDEX:
904 return tool->id_index(tool, event, session);
910 static void event_swap(union perf_event *event, bool sample_id_all)
912 perf_event__swap_op swap;
914 swap = perf_event__swap_ops[event->header.type];
916 swap(event, sample_id_all);
919 int perf_session__peek_event(struct perf_session *session, off_t file_offset,
920 void *buf, size_t buf_sz,
921 union perf_event **event_ptr,
922 struct perf_sample *sample)
924 union perf_event *event;
928 if (session->one_mmap && !session->header.needs_swap) {
929 event = file_offset - session->one_mmap_offset +
930 session->one_mmap_addr;
931 goto out_parse_sample;
934 if (perf_data_file__is_pipe(session->file))
937 fd = perf_data_file__fd(session->file);
938 hdr_sz = sizeof(struct perf_event_header);
943 if (lseek(fd, file_offset, SEEK_SET) == (off_t)-1 ||
944 readn(fd, &buf, hdr_sz) != (ssize_t)hdr_sz)
947 event = (union perf_event *)buf;
949 if (session->header.needs_swap)
950 perf_event_header__bswap(&event->header);
952 if (event->header.size < hdr_sz)
955 rest = event->header.size - hdr_sz;
957 if (readn(fd, &buf, rest) != (ssize_t)rest)
960 if (session->header.needs_swap)
961 event_swap(event, perf_evlist__sample_id_all(session->evlist));
965 if (sample && event->header.type < PERF_RECORD_USER_TYPE_START &&
966 perf_evlist__parse_sample(session->evlist, event, sample))
974 static s64 perf_session__process_event(struct perf_session *session,
975 union perf_event *event,
976 struct perf_tool *tool,
979 struct perf_sample sample;
982 if (session->header.needs_swap)
983 event_swap(event, perf_evlist__sample_id_all(session->evlist));
985 if (event->header.type >= PERF_RECORD_HEADER_MAX)
988 events_stats__inc(&session->stats, event->header.type);
990 if (event->header.type >= PERF_RECORD_USER_TYPE_START)
991 return perf_session__process_user_event(session, event, tool, file_offset);
994 * For all kernel events we get the sample data
996 ret = perf_evlist__parse_sample(session->evlist, event, &sample);
1000 if (tool->ordered_events) {
1001 ret = perf_session_queue_event(session, event, tool, &sample,
1007 return perf_session__deliver_event(session, event, &sample, tool,
1011 void perf_event_header__bswap(struct perf_event_header *hdr)
1013 hdr->type = bswap_32(hdr->type);
1014 hdr->misc = bswap_16(hdr->misc);
1015 hdr->size = bswap_16(hdr->size);
1018 struct thread *perf_session__findnew(struct perf_session *session, pid_t pid)
1020 return machine__findnew_thread(&session->machines.host, -1, pid);
1023 static struct thread *perf_session__register_idle_thread(struct perf_session *session)
1025 struct thread *thread;
1027 thread = machine__findnew_thread(&session->machines.host, 0, 0);
1028 if (thread == NULL || thread__set_comm(thread, "swapper", 0)) {
1029 pr_err("problem inserting idle task.\n");
1036 static void perf_session__warn_about_errors(const struct perf_session *session,
1037 const struct perf_tool *tool)
1039 if (tool->lost == perf_event__process_lost &&
1040 session->stats.nr_events[PERF_RECORD_LOST] != 0) {
1041 ui__warning("Processed %d events and lost %d chunks!\n\n"
1042 "Check IO/CPU overload!\n\n",
1043 session->stats.nr_events[0],
1044 session->stats.nr_events[PERF_RECORD_LOST]);
1047 if (session->stats.nr_unknown_events != 0) {
1048 ui__warning("Found %u unknown events!\n\n"
1049 "Is this an older tool processing a perf.data "
1050 "file generated by a more recent tool?\n\n"
1051 "If that is not the case, consider "
1052 "reporting to linux-kernel@vger.kernel.org.\n\n",
1053 session->stats.nr_unknown_events);
1056 if (session->stats.nr_unknown_id != 0) {
1057 ui__warning("%u samples with id not present in the header\n",
1058 session->stats.nr_unknown_id);
1061 if (session->stats.nr_invalid_chains != 0) {
1062 ui__warning("Found invalid callchains!\n\n"
1063 "%u out of %u events were discarded for this reason.\n\n"
1064 "Consider reporting to linux-kernel@vger.kernel.org.\n\n",
1065 session->stats.nr_invalid_chains,
1066 session->stats.nr_events[PERF_RECORD_SAMPLE]);
1069 if (session->stats.nr_unprocessable_samples != 0) {
1070 ui__warning("%u unprocessable samples recorded.\n"
1071 "Do you have a KVM guest running and not using 'perf kvm'?\n",
1072 session->stats.nr_unprocessable_samples);
1076 volatile int session_done;
1078 static int __perf_session__process_pipe_events(struct perf_session *session,
1079 struct perf_tool *tool)
1081 int fd = perf_data_file__fd(session->file);
1082 union perf_event *event;
1083 uint32_t size, cur_size = 0;
1090 perf_tool__fill_defaults(tool);
1093 cur_size = sizeof(union perf_event);
1095 buf = malloc(cur_size);
1100 err = readn(fd, event, sizeof(struct perf_event_header));
1105 pr_err("failed to read event header\n");
1109 if (session->header.needs_swap)
1110 perf_event_header__bswap(&event->header);
1112 size = event->header.size;
1113 if (size < sizeof(struct perf_event_header)) {
1114 pr_err("bad event header size\n");
1118 if (size > cur_size) {
1119 void *new = realloc(buf, size);
1121 pr_err("failed to allocate memory to read event\n");
1129 p += sizeof(struct perf_event_header);
1131 if (size - sizeof(struct perf_event_header)) {
1132 err = readn(fd, p, size - sizeof(struct perf_event_header));
1135 pr_err("unexpected end of event stream\n");
1139 pr_err("failed to read event data\n");
1144 if ((skip = perf_session__process_event(session, event, tool, head)) < 0) {
1145 pr_err("%#" PRIx64 " [%#x]: failed to process type: %d\n",
1146 head, event->header.size, event->header.type);
1156 if (!session_done())
1159 /* do the final flush for ordered samples */
1160 err = ordered_events__flush(session, tool, OE_FLUSH__FINAL);
1163 perf_session__warn_about_errors(session, tool);
1164 ordered_events__free(&session->ordered_events);
1168 static union perf_event *
1169 fetch_mmaped_event(struct perf_session *session,
1170 u64 head, size_t mmap_size, char *buf)
1172 union perf_event *event;
1175 * Ensure we have enough space remaining to read
1176 * the size of the event in the headers.
1178 if (head + sizeof(event->header) > mmap_size)
1181 event = (union perf_event *)(buf + head);
1183 if (session->header.needs_swap)
1184 perf_event_header__bswap(&event->header);
1186 if (head + event->header.size > mmap_size) {
1187 /* We're not fetching the event so swap back again */
1188 if (session->header.needs_swap)
1189 perf_event_header__bswap(&event->header);
1197 * On 64bit we can mmap the data file in one go. No need for tiny mmap
1198 * slices. On 32bit we use 32MB.
1200 #if BITS_PER_LONG == 64
1201 #define MMAP_SIZE ULLONG_MAX
1204 #define MMAP_SIZE (32 * 1024 * 1024ULL)
1205 #define NUM_MMAPS 128
1208 int __perf_session__process_events(struct perf_session *session,
1209 u64 data_offset, u64 data_size,
1210 u64 file_size, struct perf_tool *tool)
1212 int fd = perf_data_file__fd(session->file);
1213 u64 head, page_offset, file_offset, file_pos, size;
1214 int err, mmap_prot, mmap_flags, map_idx = 0;
1216 char *buf, *mmaps[NUM_MMAPS];
1217 union perf_event *event;
1218 struct ui_progress prog;
1221 perf_tool__fill_defaults(tool);
1223 page_offset = page_size * (data_offset / page_size);
1224 file_offset = page_offset;
1225 head = data_offset - page_offset;
1227 if (data_size && (data_offset + data_size < file_size))
1228 file_size = data_offset + data_size;
1230 ui_progress__init(&prog, file_size, "Processing events...");
1232 mmap_size = MMAP_SIZE;
1233 if (mmap_size > file_size) {
1234 mmap_size = file_size;
1235 session->one_mmap = true;
1238 memset(mmaps, 0, sizeof(mmaps));
1240 mmap_prot = PROT_READ;
1241 mmap_flags = MAP_SHARED;
1243 if (session->header.needs_swap) {
1244 mmap_prot |= PROT_WRITE;
1245 mmap_flags = MAP_PRIVATE;
1248 buf = mmap(NULL, mmap_size, mmap_prot, mmap_flags, fd,
1250 if (buf == MAP_FAILED) {
1251 pr_err("failed to mmap file\n");
1255 mmaps[map_idx] = buf;
1256 map_idx = (map_idx + 1) & (ARRAY_SIZE(mmaps) - 1);
1257 file_pos = file_offset + head;
1258 if (session->one_mmap) {
1259 session->one_mmap_addr = buf;
1260 session->one_mmap_offset = file_offset;
1264 event = fetch_mmaped_event(session, head, mmap_size, buf);
1266 if (mmaps[map_idx]) {
1267 munmap(mmaps[map_idx], mmap_size);
1268 mmaps[map_idx] = NULL;
1271 page_offset = page_size * (head / page_size);
1272 file_offset += page_offset;
1273 head -= page_offset;
1277 size = event->header.size;
1279 if (size < sizeof(struct perf_event_header) ||
1280 (skip = perf_session__process_event(session, event, tool, file_pos))
1282 pr_err("%#" PRIx64 " [%#x]: failed to process type: %d\n",
1283 file_offset + head, event->header.size,
1284 event->header.type);
1295 ui_progress__update(&prog, size);
1300 if (file_pos < file_size)
1304 /* do the final flush for ordered samples */
1305 err = ordered_events__flush(session, tool, OE_FLUSH__FINAL);
1307 ui_progress__finish();
1308 perf_session__warn_about_errors(session, tool);
1309 ordered_events__free(&session->ordered_events);
1310 session->one_mmap = false;
1314 int perf_session__process_events(struct perf_session *session,
1315 struct perf_tool *tool)
1317 u64 size = perf_data_file__size(session->file);
1320 if (perf_session__register_idle_thread(session) == NULL)
1323 if (!perf_data_file__is_pipe(session->file))
1324 err = __perf_session__process_events(session,
1325 session->header.data_offset,
1326 session->header.data_size,
1329 err = __perf_session__process_pipe_events(session, tool);
1334 bool perf_session__has_traces(struct perf_session *session, const char *msg)
1336 struct perf_evsel *evsel;
1338 evlist__for_each(session->evlist, evsel) {
1339 if (evsel->attr.type == PERF_TYPE_TRACEPOINT)
1343 pr_err("No trace sample to read. Did you call 'perf %s'?\n", msg);
1347 int maps__set_kallsyms_ref_reloc_sym(struct map **maps,
1348 const char *symbol_name, u64 addr)
1352 struct ref_reloc_sym *ref;
1354 ref = zalloc(sizeof(struct ref_reloc_sym));
1358 ref->name = strdup(symbol_name);
1359 if (ref->name == NULL) {
1364 bracket = strchr(ref->name, ']');
1370 for (i = 0; i < MAP__NR_TYPES; ++i) {
1371 struct kmap *kmap = map__kmap(maps[i]);
1372 kmap->ref_reloc_sym = ref;
1378 size_t perf_session__fprintf_dsos(struct perf_session *session, FILE *fp)
1380 return machines__fprintf_dsos(&session->machines, fp);
1383 size_t perf_session__fprintf_dsos_buildid(struct perf_session *session, FILE *fp,
1384 bool (skip)(struct dso *dso, int parm), int parm)
1386 return machines__fprintf_dsos_buildid(&session->machines, fp, skip, parm);
1389 size_t perf_session__fprintf_nr_events(struct perf_session *session, FILE *fp)
1391 size_t ret = fprintf(fp, "Aggregated stats:\n");
1393 ret += events_stats__fprintf(&session->stats, fp);
1397 size_t perf_session__fprintf(struct perf_session *session, FILE *fp)
1400 * FIXME: Here we have to actually print all the machines in this
1401 * session, not just the host...
1403 return machine__fprintf(&session->machines.host, fp);
1406 struct perf_evsel *perf_session__find_first_evtype(struct perf_session *session,
1409 struct perf_evsel *pos;
1411 evlist__for_each(session->evlist, pos) {
1412 if (pos->attr.type == type)
1418 void perf_evsel__print_ip(struct perf_evsel *evsel, struct perf_sample *sample,
1419 struct addr_location *al,
1420 unsigned int print_opts, unsigned int stack_depth)
1422 struct callchain_cursor_node *node;
1423 int print_ip = print_opts & PRINT_IP_OPT_IP;
1424 int print_sym = print_opts & PRINT_IP_OPT_SYM;
1425 int print_dso = print_opts & PRINT_IP_OPT_DSO;
1426 int print_symoffset = print_opts & PRINT_IP_OPT_SYMOFFSET;
1427 int print_oneline = print_opts & PRINT_IP_OPT_ONELINE;
1428 int print_srcline = print_opts & PRINT_IP_OPT_SRCLINE;
1429 char s = print_oneline ? ' ' : '\t';
1431 if (symbol_conf.use_callchain && sample->callchain) {
1432 struct addr_location node_al;
1434 if (thread__resolve_callchain(al->thread, evsel,
1436 PERF_MAX_STACK_DEPTH) != 0) {
1438 error("Failed to resolve callchain. Skipping\n");
1441 callchain_cursor_commit(&callchain_cursor);
1443 if (print_symoffset)
1446 while (stack_depth) {
1449 node = callchain_cursor_current(&callchain_cursor);
1453 if (node->sym && node->sym->ignore)
1457 printf("%c%16" PRIx64, s, node->ip);
1460 addr = node->map->map_ip(node->map, node->ip);
1464 if (print_symoffset) {
1465 node_al.addr = addr;
1466 node_al.map = node->map;
1467 symbol__fprintf_symname_offs(node->sym, &node_al, stdout);
1469 symbol__fprintf_symname(node->sym, stdout);
1474 map__fprintf_dsoname(node->map, stdout);
1479 map__fprintf_srcline(node->map, addr, "\n ",
1487 callchain_cursor_advance(&callchain_cursor);
1491 if (al->sym && al->sym->ignore)
1495 printf("%16" PRIx64, sample->ip);
1499 if (print_symoffset)
1500 symbol__fprintf_symname_offs(al->sym, al,
1503 symbol__fprintf_symname(al->sym, stdout);
1508 map__fprintf_dsoname(al->map, stdout);
1513 map__fprintf_srcline(al->map, al->addr, "\n ", stdout);
1517 int perf_session__cpu_bitmap(struct perf_session *session,
1518 const char *cpu_list, unsigned long *cpu_bitmap)
1521 struct cpu_map *map;
1523 for (i = 0; i < PERF_TYPE_MAX; ++i) {
1524 struct perf_evsel *evsel;
1526 evsel = perf_session__find_first_evtype(session, i);
1530 if (!(evsel->attr.sample_type & PERF_SAMPLE_CPU)) {
1531 pr_err("File does not contain CPU events. "
1532 "Remove -c option to proceed.\n");
1537 map = cpu_map__new(cpu_list);
1539 pr_err("Invalid cpu_list\n");
1543 for (i = 0; i < map->nr; i++) {
1544 int cpu = map->map[i];
1546 if (cpu >= MAX_NR_CPUS) {
1547 pr_err("Requested CPU %d too large. "
1548 "Consider raising MAX_NR_CPUS\n", cpu);
1549 goto out_delete_map;
1552 set_bit(cpu, cpu_bitmap);
1558 cpu_map__delete(map);
1562 void perf_session__fprintf_info(struct perf_session *session, FILE *fp,
1568 if (session == NULL || fp == NULL)
1571 fd = perf_data_file__fd(session->file);
1573 ret = fstat(fd, &st);
1577 fprintf(fp, "# ========\n");
1578 fprintf(fp, "# captured on: %s", ctime(&st.st_ctime));
1579 perf_header__fprintf_info(session, fp, full);
1580 fprintf(fp, "# ========\n#\n");
1584 int __perf_session__set_tracepoints_handlers(struct perf_session *session,
1585 const struct perf_evsel_str_handler *assocs,
1588 struct perf_evsel *evsel;
1592 for (i = 0; i < nr_assocs; i++) {
1594 * Adding a handler for an event not in the session,
1597 evsel = perf_evlist__find_tracepoint_by_name(session->evlist, assocs[i].name);
1602 if (evsel->handler != NULL)
1604 evsel->handler = assocs[i].handler;
1612 int perf_event__process_id_index(struct perf_tool *tool __maybe_unused,
1613 union perf_event *event,
1614 struct perf_session *session)
1616 struct perf_evlist *evlist = session->evlist;
1617 struct id_index_event *ie = &event->id_index;
1618 size_t i, nr, max_nr;
1620 max_nr = (ie->header.size - sizeof(struct id_index_event)) /
1621 sizeof(struct id_index_entry);
1627 fprintf(stdout, " nr: %zu\n", nr);
1629 for (i = 0; i < nr; i++) {
1630 struct id_index_entry *e = &ie->entries[i];
1631 struct perf_sample_id *sid;
1634 fprintf(stdout, " ... id: %"PRIu64, e->id);
1635 fprintf(stdout, " idx: %"PRIu64, e->idx);
1636 fprintf(stdout, " cpu: %"PRId64, e->cpu);
1637 fprintf(stdout, " tid: %"PRId64"\n", e->tid);
1640 sid = perf_evlist__id2sid(evlist, e->id);
1650 int perf_event__synthesize_id_index(struct perf_tool *tool,
1651 perf_event__handler_t process,
1652 struct perf_evlist *evlist,
1653 struct machine *machine)
1655 union perf_event *ev;
1656 struct perf_evsel *evsel;
1657 size_t nr = 0, i = 0, sz, max_nr, n;
1660 pr_debug2("Synthesizing id index\n");
1662 max_nr = (UINT16_MAX - sizeof(struct id_index_event)) /
1663 sizeof(struct id_index_entry);
1665 evlist__for_each(evlist, evsel)
1668 n = nr > max_nr ? max_nr : nr;
1669 sz = sizeof(struct id_index_event) + n * sizeof(struct id_index_entry);
1674 ev->id_index.header.type = PERF_RECORD_ID_INDEX;
1675 ev->id_index.header.size = sz;
1676 ev->id_index.nr = n;
1678 evlist__for_each(evlist, evsel) {
1681 for (j = 0; j < evsel->ids; j++) {
1682 struct id_index_entry *e;
1683 struct perf_sample_id *sid;
1686 err = process(tool, ev, NULL, machine);
1693 e = &ev->id_index.entries[i++];
1695 e->id = evsel->id[j];
1697 sid = perf_evlist__id2sid(evlist, e->id);
1709 sz = sizeof(struct id_index_event) + nr * sizeof(struct id_index_entry);
1710 ev->id_index.header.size = sz;
1711 ev->id_index.nr = nr;
1713 err = process(tool, ev, NULL, machine);