1 #define _FILE_OFFSET_BITS 64
3 #include <linux/kernel.h>
17 static int perf_session__open(struct perf_session
*self
, bool force
)
19 struct stat input_stat
;
21 if (!strcmp(self
->filename
, "-")) {
23 self
->fd
= STDIN_FILENO
;
25 if (perf_session__read_header(self
, self
->fd
) < 0)
26 pr_err("incompatible file format");
31 self
->fd
= open(self
->filename
, O_RDONLY
);
35 pr_err("failed to open %s: %s", self
->filename
, strerror(err
));
36 if (err
== ENOENT
&& !strcmp(self
->filename
, "perf.data"))
37 pr_err(" (try 'perf record' first)");
42 if (fstat(self
->fd
, &input_stat
) < 0)
45 if (!force
&& input_stat
.st_uid
&& (input_stat
.st_uid
!= geteuid())) {
46 pr_err("file %s not owned by current user or root\n",
51 if (!input_stat
.st_size
) {
52 pr_info("zero-sized file (%s), nothing to do!\n",
57 if (perf_session__read_header(self
, self
->fd
) < 0) {
58 pr_err("incompatible file format");
62 if (!perf_evlist__valid_sample_type(self
->evlist
)) {
63 pr_err("non matching sample_type");
67 if (!perf_evlist__valid_sample_id_all(self
->evlist
)) {
68 pr_err("non matching sample_id_all");
72 self
->size
= input_stat
.st_size
;
81 static void perf_session__id_header_size(struct perf_session
*session
)
83 struct perf_sample
*data
;
84 u64 sample_type
= session
->sample_type
;
87 if (!session
->sample_id_all
)
90 if (sample_type
& PERF_SAMPLE_TID
)
91 size
+= sizeof(data
->tid
) * 2;
93 if (sample_type
& PERF_SAMPLE_TIME
)
94 size
+= sizeof(data
->time
);
96 if (sample_type
& PERF_SAMPLE_ID
)
97 size
+= sizeof(data
->id
);
99 if (sample_type
& PERF_SAMPLE_STREAM_ID
)
100 size
+= sizeof(data
->stream_id
);
102 if (sample_type
& PERF_SAMPLE_CPU
)
103 size
+= sizeof(data
->cpu
) * 2;
105 session
->id_hdr_size
= size
;
108 void perf_session__update_sample_type(struct perf_session
*self
)
110 self
->sample_type
= perf_evlist__sample_type(self
->evlist
);
111 self
->sample_size
= __perf_evsel__sample_size(self
->sample_type
);
112 self
->sample_id_all
= perf_evlist__sample_id_all(self
->evlist
);
113 perf_session__id_header_size(self
);
116 int perf_session__create_kernel_maps(struct perf_session
*self
)
118 int ret
= machine__create_kernel_maps(&self
->host_machine
);
121 ret
= machines__create_guest_kernel_maps(&self
->machines
);
125 static void perf_session__destroy_kernel_maps(struct perf_session
*self
)
127 machine__destroy_kernel_maps(&self
->host_machine
);
128 machines__destroy_guest_kernel_maps(&self
->machines
);
131 struct perf_session
*perf_session__new(const char *filename
, int mode
,
132 bool force
, bool repipe
,
133 struct perf_event_ops
*ops
)
135 size_t len
= filename
? strlen(filename
) + 1 : 0;
136 struct perf_session
*self
= zalloc(sizeof(*self
) + len
);
141 memcpy(self
->filename
, filename
, len
);
142 self
->threads
= RB_ROOT
;
143 INIT_LIST_HEAD(&self
->dead_threads
);
144 self
->last_match
= NULL
;
146 * On 64bit we can mmap the data file in one go. No need for tiny mmap
147 * slices. On 32bit we use 32MB.
149 #if BITS_PER_LONG == 64
150 self
->mmap_window
= ULLONG_MAX
;
152 self
->mmap_window
= 32 * 1024 * 1024ULL;
154 self
->machines
= RB_ROOT
;
155 self
->repipe
= repipe
;
156 INIT_LIST_HEAD(&self
->ordered_samples
.samples
);
157 INIT_LIST_HEAD(&self
->ordered_samples
.sample_cache
);
158 INIT_LIST_HEAD(&self
->ordered_samples
.to_free
);
159 machine__init(&self
->host_machine
, "", HOST_KERNEL_ID
);
161 if (mode
== O_RDONLY
) {
162 if (perf_session__open(self
, force
) < 0)
164 perf_session__update_sample_type(self
);
165 } else if (mode
== O_WRONLY
) {
167 * In O_RDONLY mode this will be performed when reading the
168 * kernel MMAP event, in perf_event__process_mmap().
170 if (perf_session__create_kernel_maps(self
) < 0)
174 if (ops
&& ops
->ordering_requires_timestamps
&&
175 ops
->ordered_samples
&& !self
->sample_id_all
) {
176 dump_printf("WARNING: No sample_id_all support, falling back to unordered processing\n");
177 ops
->ordered_samples
= false;
183 perf_session__delete(self
);
187 static void perf_session__delete_dead_threads(struct perf_session
*self
)
189 struct thread
*n
, *t
;
191 list_for_each_entry_safe(t
, n
, &self
->dead_threads
, node
) {
197 static void perf_session__delete_threads(struct perf_session
*self
)
199 struct rb_node
*nd
= rb_first(&self
->threads
);
202 struct thread
*t
= rb_entry(nd
, struct thread
, rb_node
);
204 rb_erase(&t
->rb_node
, &self
->threads
);
210 void perf_session__delete(struct perf_session
*self
)
212 perf_session__destroy_kernel_maps(self
);
213 perf_session__delete_dead_threads(self
);
214 perf_session__delete_threads(self
);
215 machine__exit(&self
->host_machine
);
220 void perf_session__remove_thread(struct perf_session
*self
, struct thread
*th
)
222 self
->last_match
= NULL
;
223 rb_erase(&th
->rb_node
, &self
->threads
);
225 * We may have references to this thread, for instance in some hist_entry
226 * instances, so just move them to a separate list.
228 list_add_tail(&th
->node
, &self
->dead_threads
);
231 static bool symbol__match_parent_regex(struct symbol
*sym
)
233 if (sym
->name
&& !regexec(&parent_regex
, sym
->name
, 0, NULL
, 0))
239 int perf_session__resolve_callchain(struct perf_session
*self
,
240 struct thread
*thread
,
241 struct ip_callchain
*chain
,
242 struct symbol
**parent
)
244 u8 cpumode
= PERF_RECORD_MISC_USER
;
248 callchain_cursor_reset(&self
->callchain_cursor
);
250 for (i
= 0; i
< chain
->nr
; i
++) {
252 struct addr_location al
;
254 if (callchain_param
.order
== ORDER_CALLEE
)
257 ip
= chain
->ips
[chain
->nr
- i
- 1];
259 if (ip
>= PERF_CONTEXT_MAX
) {
261 case PERF_CONTEXT_HV
:
262 cpumode
= PERF_RECORD_MISC_HYPERVISOR
; break;
263 case PERF_CONTEXT_KERNEL
:
264 cpumode
= PERF_RECORD_MISC_KERNEL
; break;
265 case PERF_CONTEXT_USER
:
266 cpumode
= PERF_RECORD_MISC_USER
; break;
274 thread__find_addr_location(thread
, self
, cpumode
,
275 MAP__FUNCTION
, thread
->pid
, ip
, &al
, NULL
);
276 if (al
.sym
!= NULL
) {
277 if (sort__has_parent
&& !*parent
&&
278 symbol__match_parent_regex(al
.sym
))
280 if (!symbol_conf
.use_callchain
)
284 err
= callchain_cursor_append(&self
->callchain_cursor
,
293 static int process_event_synth_stub(union perf_event
*event __used
,
294 struct perf_session
*session __used
)
296 dump_printf(": unhandled!\n");
300 static int process_event_sample_stub(union perf_event
*event __used
,
301 struct perf_sample
*sample __used
,
302 struct perf_evsel
*evsel __used
,
303 struct perf_session
*session __used
)
305 dump_printf(": unhandled!\n");
309 static int process_event_stub(union perf_event
*event __used
,
310 struct perf_sample
*sample __used
,
311 struct perf_session
*session __used
)
313 dump_printf(": unhandled!\n");
317 static int process_finished_round_stub(union perf_event
*event __used
,
318 struct perf_session
*session __used
,
319 struct perf_event_ops
*ops __used
)
321 dump_printf(": unhandled!\n");
325 static int process_finished_round(union perf_event
*event
,
326 struct perf_session
*session
,
327 struct perf_event_ops
*ops
);
329 static void perf_event_ops__fill_defaults(struct perf_event_ops
*handler
)
331 if (handler
->sample
== NULL
)
332 handler
->sample
= process_event_sample_stub
;
333 if (handler
->mmap
== NULL
)
334 handler
->mmap
= process_event_stub
;
335 if (handler
->comm
== NULL
)
336 handler
->comm
= process_event_stub
;
337 if (handler
->fork
== NULL
)
338 handler
->fork
= process_event_stub
;
339 if (handler
->exit
== NULL
)
340 handler
->exit
= process_event_stub
;
341 if (handler
->lost
== NULL
)
342 handler
->lost
= perf_event__process_lost
;
343 if (handler
->read
== NULL
)
344 handler
->read
= process_event_stub
;
345 if (handler
->throttle
== NULL
)
346 handler
->throttle
= process_event_stub
;
347 if (handler
->unthrottle
== NULL
)
348 handler
->unthrottle
= process_event_stub
;
349 if (handler
->attr
== NULL
)
350 handler
->attr
= process_event_synth_stub
;
351 if (handler
->event_type
== NULL
)
352 handler
->event_type
= process_event_synth_stub
;
353 if (handler
->tracing_data
== NULL
)
354 handler
->tracing_data
= process_event_synth_stub
;
355 if (handler
->build_id
== NULL
)
356 handler
->build_id
= process_event_synth_stub
;
357 if (handler
->finished_round
== NULL
) {
358 if (handler
->ordered_samples
)
359 handler
->finished_round
= process_finished_round
;
361 handler
->finished_round
= process_finished_round_stub
;
365 void mem_bswap_64(void *src
, int byte_size
)
369 while (byte_size
> 0) {
371 byte_size
-= sizeof(u64
);
376 static void perf_event__all64_swap(union perf_event
*event
)
378 struct perf_event_header
*hdr
= &event
->header
;
379 mem_bswap_64(hdr
+ 1, event
->header
.size
- sizeof(*hdr
));
382 static void perf_event__comm_swap(union perf_event
*event
)
384 event
->comm
.pid
= bswap_32(event
->comm
.pid
);
385 event
->comm
.tid
= bswap_32(event
->comm
.tid
);
388 static void perf_event__mmap_swap(union perf_event
*event
)
390 event
->mmap
.pid
= bswap_32(event
->mmap
.pid
);
391 event
->mmap
.tid
= bswap_32(event
->mmap
.tid
);
392 event
->mmap
.start
= bswap_64(event
->mmap
.start
);
393 event
->mmap
.len
= bswap_64(event
->mmap
.len
);
394 event
->mmap
.pgoff
= bswap_64(event
->mmap
.pgoff
);
397 static void perf_event__task_swap(union perf_event
*event
)
399 event
->fork
.pid
= bswap_32(event
->fork
.pid
);
400 event
->fork
.tid
= bswap_32(event
->fork
.tid
);
401 event
->fork
.ppid
= bswap_32(event
->fork
.ppid
);
402 event
->fork
.ptid
= bswap_32(event
->fork
.ptid
);
403 event
->fork
.time
= bswap_64(event
->fork
.time
);
406 static void perf_event__read_swap(union perf_event
*event
)
408 event
->read
.pid
= bswap_32(event
->read
.pid
);
409 event
->read
.tid
= bswap_32(event
->read
.tid
);
410 event
->read
.value
= bswap_64(event
->read
.value
);
411 event
->read
.time_enabled
= bswap_64(event
->read
.time_enabled
);
412 event
->read
.time_running
= bswap_64(event
->read
.time_running
);
413 event
->read
.id
= bswap_64(event
->read
.id
);
416 /* exported for swapping attributes in file header */
417 void perf_event__attr_swap(struct perf_event_attr
*attr
)
419 attr
->type
= bswap_32(attr
->type
);
420 attr
->size
= bswap_32(attr
->size
);
421 attr
->config
= bswap_64(attr
->config
);
422 attr
->sample_period
= bswap_64(attr
->sample_period
);
423 attr
->sample_type
= bswap_64(attr
->sample_type
);
424 attr
->read_format
= bswap_64(attr
->read_format
);
425 attr
->wakeup_events
= bswap_32(attr
->wakeup_events
);
426 attr
->bp_type
= bswap_32(attr
->bp_type
);
427 attr
->bp_addr
= bswap_64(attr
->bp_addr
);
428 attr
->bp_len
= bswap_64(attr
->bp_len
);
431 static void perf_event__hdr_attr_swap(union perf_event
*event
)
435 perf_event__attr_swap(&event
->attr
.attr
);
437 size
= event
->header
.size
;
438 size
-= (void *)&event
->attr
.id
- (void *)event
;
439 mem_bswap_64(event
->attr
.id
, size
);
442 static void perf_event__event_type_swap(union perf_event
*event
)
444 event
->event_type
.event_type
.event_id
=
445 bswap_64(event
->event_type
.event_type
.event_id
);
448 static void perf_event__tracing_data_swap(union perf_event
*event
)
450 event
->tracing_data
.size
= bswap_32(event
->tracing_data
.size
);
453 typedef void (*perf_event__swap_op
)(union perf_event
*event
);
455 static perf_event__swap_op perf_event__swap_ops
[] = {
456 [PERF_RECORD_MMAP
] = perf_event__mmap_swap
,
457 [PERF_RECORD_COMM
] = perf_event__comm_swap
,
458 [PERF_RECORD_FORK
] = perf_event__task_swap
,
459 [PERF_RECORD_EXIT
] = perf_event__task_swap
,
460 [PERF_RECORD_LOST
] = perf_event__all64_swap
,
461 [PERF_RECORD_READ
] = perf_event__read_swap
,
462 [PERF_RECORD_SAMPLE
] = perf_event__all64_swap
,
463 [PERF_RECORD_HEADER_ATTR
] = perf_event__hdr_attr_swap
,
464 [PERF_RECORD_HEADER_EVENT_TYPE
] = perf_event__event_type_swap
,
465 [PERF_RECORD_HEADER_TRACING_DATA
] = perf_event__tracing_data_swap
,
466 [PERF_RECORD_HEADER_BUILD_ID
] = NULL
,
467 [PERF_RECORD_HEADER_MAX
] = NULL
,
470 struct sample_queue
{
473 union perf_event
*event
;
474 struct list_head list
;
477 static void perf_session_free_sample_buffers(struct perf_session
*session
)
479 struct ordered_samples
*os
= &session
->ordered_samples
;
481 while (!list_empty(&os
->to_free
)) {
482 struct sample_queue
*sq
;
484 sq
= list_entry(os
->to_free
.next
, struct sample_queue
, list
);
490 static int perf_session_deliver_event(struct perf_session
*session
,
491 union perf_event
*event
,
492 struct perf_sample
*sample
,
493 struct perf_event_ops
*ops
,
496 static void flush_sample_queue(struct perf_session
*s
,
497 struct perf_event_ops
*ops
)
499 struct ordered_samples
*os
= &s
->ordered_samples
;
500 struct list_head
*head
= &os
->samples
;
501 struct sample_queue
*tmp
, *iter
;
502 struct perf_sample sample
;
503 u64 limit
= os
->next_flush
;
504 u64 last_ts
= os
->last_sample
? os
->last_sample
->timestamp
: 0ULL;
505 unsigned idx
= 0, progress_next
= os
->nr_samples
/ 16;
508 if (!ops
->ordered_samples
|| !limit
)
511 list_for_each_entry_safe(iter
, tmp
, head
, list
) {
512 if (iter
->timestamp
> limit
)
515 ret
= perf_session__parse_sample(s
, iter
->event
, &sample
);
517 pr_err("Can't parse sample, err = %d\n", ret
);
519 perf_session_deliver_event(s
, iter
->event
, &sample
, ops
,
522 os
->last_flush
= iter
->timestamp
;
523 list_del(&iter
->list
);
524 list_add(&iter
->list
, &os
->sample_cache
);
525 if (++idx
>= progress_next
) {
526 progress_next
+= os
->nr_samples
/ 16;
527 ui_progress__update(idx
, os
->nr_samples
,
528 "Processing time ordered events...");
532 if (list_empty(head
)) {
533 os
->last_sample
= NULL
;
534 } else if (last_ts
<= limit
) {
536 list_entry(head
->prev
, struct sample_queue
, list
);
543 * When perf record finishes a pass on every buffers, it records this pseudo
545 * We record the max timestamp t found in the pass n.
546 * Assuming these timestamps are monotonic across cpus, we know that if
547 * a buffer still has events with timestamps below t, they will be all
548 * available and then read in the pass n + 1.
549 * Hence when we start to read the pass n + 2, we can safely flush every
550 * events with timestamps below t.
552 * ============ PASS n =================
555 * cnt1 timestamps | cnt2 timestamps
558 * - | 4 <--- max recorded
560 * ============ PASS n + 1 ==============
563 * cnt1 timestamps | cnt2 timestamps
566 * 5 | 7 <---- max recorded
568 * Flush every events below timestamp 4
570 * ============ PASS n + 2 ==============
573 * cnt1 timestamps | cnt2 timestamps
578 * Flush every events below timestamp 7
581 static int process_finished_round(union perf_event
*event __used
,
582 struct perf_session
*session
,
583 struct perf_event_ops
*ops
)
585 flush_sample_queue(session
, ops
);
586 session
->ordered_samples
.next_flush
= session
->ordered_samples
.max_timestamp
;
591 /* The queue is ordered by time */
592 static void __queue_event(struct sample_queue
*new, struct perf_session
*s
)
594 struct ordered_samples
*os
= &s
->ordered_samples
;
595 struct sample_queue
*sample
= os
->last_sample
;
596 u64 timestamp
= new->timestamp
;
600 os
->last_sample
= new;
603 list_add(&new->list
, &os
->samples
);
604 os
->max_timestamp
= timestamp
;
609 * last_sample might point to some random place in the list as it's
610 * the last queued event. We expect that the new event is close to
613 if (sample
->timestamp
<= timestamp
) {
614 while (sample
->timestamp
<= timestamp
) {
615 p
= sample
->list
.next
;
616 if (p
== &os
->samples
) {
617 list_add_tail(&new->list
, &os
->samples
);
618 os
->max_timestamp
= timestamp
;
621 sample
= list_entry(p
, struct sample_queue
, list
);
623 list_add_tail(&new->list
, &sample
->list
);
625 while (sample
->timestamp
> timestamp
) {
626 p
= sample
->list
.prev
;
627 if (p
== &os
->samples
) {
628 list_add(&new->list
, &os
->samples
);
631 sample
= list_entry(p
, struct sample_queue
, list
);
633 list_add(&new->list
, &sample
->list
);
637 #define MAX_SAMPLE_BUFFER (64 * 1024 / sizeof(struct sample_queue))
639 static int perf_session_queue_event(struct perf_session
*s
, union perf_event
*event
,
640 struct perf_sample
*sample
, u64 file_offset
)
642 struct ordered_samples
*os
= &s
->ordered_samples
;
643 struct list_head
*sc
= &os
->sample_cache
;
644 u64 timestamp
= sample
->time
;
645 struct sample_queue
*new;
647 if (!timestamp
|| timestamp
== ~0ULL)
650 if (timestamp
< s
->ordered_samples
.last_flush
) {
651 printf("Warning: Timestamp below last timeslice flush\n");
655 if (!list_empty(sc
)) {
656 new = list_entry(sc
->next
, struct sample_queue
, list
);
657 list_del(&new->list
);
658 } else if (os
->sample_buffer
) {
659 new = os
->sample_buffer
+ os
->sample_buffer_idx
;
660 if (++os
->sample_buffer_idx
== MAX_SAMPLE_BUFFER
)
661 os
->sample_buffer
= NULL
;
663 os
->sample_buffer
= malloc(MAX_SAMPLE_BUFFER
* sizeof(*new));
664 if (!os
->sample_buffer
)
666 list_add(&os
->sample_buffer
->list
, &os
->to_free
);
667 os
->sample_buffer_idx
= 2;
668 new = os
->sample_buffer
+ 1;
671 new->timestamp
= timestamp
;
672 new->file_offset
= file_offset
;
675 __queue_event(new, s
);
680 static void callchain__printf(struct perf_sample
*sample
)
684 printf("... chain: nr:%" PRIu64
"\n", sample
->callchain
->nr
);
686 for (i
= 0; i
< sample
->callchain
->nr
; i
++)
687 printf("..... %2d: %016" PRIx64
"\n",
688 i
, sample
->callchain
->ips
[i
]);
691 static void perf_session__print_tstamp(struct perf_session
*session
,
692 union perf_event
*event
,
693 struct perf_sample
*sample
)
695 if (event
->header
.type
!= PERF_RECORD_SAMPLE
&&
696 !session
->sample_id_all
) {
697 fputs("-1 -1 ", stdout
);
701 if ((session
->sample_type
& PERF_SAMPLE_CPU
))
702 printf("%u ", sample
->cpu
);
704 if (session
->sample_type
& PERF_SAMPLE_TIME
)
705 printf("%" PRIu64
" ", sample
->time
);
708 static void dump_event(struct perf_session
*session
, union perf_event
*event
,
709 u64 file_offset
, struct perf_sample
*sample
)
714 printf("\n%#" PRIx64
" [%#x]: event: %d\n",
715 file_offset
, event
->header
.size
, event
->header
.type
);
720 perf_session__print_tstamp(session
, event
, sample
);
722 printf("%#" PRIx64
" [%#x]: PERF_RECORD_%s", file_offset
,
723 event
->header
.size
, perf_event__name(event
->header
.type
));
726 static void dump_sample(struct perf_session
*session
, union perf_event
*event
,
727 struct perf_sample
*sample
)
732 printf("(IP, %d): %d/%d: %#" PRIx64
" period: %" PRIu64
" addr: %#" PRIx64
"\n",
733 event
->header
.misc
, sample
->pid
, sample
->tid
, sample
->ip
,
734 sample
->period
, sample
->addr
);
736 if (session
->sample_type
& PERF_SAMPLE_CALLCHAIN
)
737 callchain__printf(sample
);
740 static int perf_session_deliver_event(struct perf_session
*session
,
741 union perf_event
*event
,
742 struct perf_sample
*sample
,
743 struct perf_event_ops
*ops
,
746 struct perf_evsel
*evsel
;
748 dump_event(session
, event
, file_offset
, sample
);
750 evsel
= perf_evlist__id2evsel(session
->evlist
, sample
->id
);
751 if (evsel
!= NULL
&& event
->header
.type
!= PERF_RECORD_SAMPLE
) {
753 * XXX We're leaving PERF_RECORD_SAMPLE unnacounted here
754 * because the tools right now may apply filters, discarding
755 * some of the samples. For consistency, in the future we
756 * should have something like nr_filtered_samples and remove
757 * the sample->period from total_sample_period, etc, KISS for
760 * Also testing against NULL allows us to handle files without
761 * attr.sample_id_all and/or without PERF_SAMPLE_ID. In the
762 * future probably it'll be a good idea to restrict event
763 * processing via perf_session to files with both set.
765 hists__inc_nr_events(&evsel
->hists
, event
->header
.type
);
768 switch (event
->header
.type
) {
769 case PERF_RECORD_SAMPLE
:
770 dump_sample(session
, event
, sample
);
772 ++session
->hists
.stats
.nr_unknown_id
;
775 return ops
->sample(event
, sample
, evsel
, session
);
776 case PERF_RECORD_MMAP
:
777 return ops
->mmap(event
, sample
, session
);
778 case PERF_RECORD_COMM
:
779 return ops
->comm(event
, sample
, session
);
780 case PERF_RECORD_FORK
:
781 return ops
->fork(event
, sample
, session
);
782 case PERF_RECORD_EXIT
:
783 return ops
->exit(event
, sample
, session
);
784 case PERF_RECORD_LOST
:
785 return ops
->lost(event
, sample
, session
);
786 case PERF_RECORD_READ
:
787 return ops
->read(event
, sample
, session
);
788 case PERF_RECORD_THROTTLE
:
789 return ops
->throttle(event
, sample
, session
);
790 case PERF_RECORD_UNTHROTTLE
:
791 return ops
->unthrottle(event
, sample
, session
);
793 ++session
->hists
.stats
.nr_unknown_events
;
798 static int perf_session__preprocess_sample(struct perf_session
*session
,
799 union perf_event
*event
, struct perf_sample
*sample
)
801 if (event
->header
.type
!= PERF_RECORD_SAMPLE
||
802 !(session
->sample_type
& PERF_SAMPLE_CALLCHAIN
))
805 if (!ip_callchain__valid(sample
->callchain
, event
)) {
806 pr_debug("call-chain problem with event, skipping it.\n");
807 ++session
->hists
.stats
.nr_invalid_chains
;
808 session
->hists
.stats
.total_invalid_chains
+= sample
->period
;
814 static int perf_session__process_user_event(struct perf_session
*session
, union perf_event
*event
,
815 struct perf_event_ops
*ops
, u64 file_offset
)
817 dump_event(session
, event
, file_offset
, NULL
);
819 /* These events are processed right away */
820 switch (event
->header
.type
) {
821 case PERF_RECORD_HEADER_ATTR
:
822 return ops
->attr(event
, session
);
823 case PERF_RECORD_HEADER_EVENT_TYPE
:
824 return ops
->event_type(event
, session
);
825 case PERF_RECORD_HEADER_TRACING_DATA
:
826 /* setup for reading amidst mmap */
827 lseek(session
->fd
, file_offset
, SEEK_SET
);
828 return ops
->tracing_data(event
, session
);
829 case PERF_RECORD_HEADER_BUILD_ID
:
830 return ops
->build_id(event
, session
);
831 case PERF_RECORD_FINISHED_ROUND
:
832 return ops
->finished_round(event
, session
, ops
);
838 static int perf_session__process_event(struct perf_session
*session
,
839 union perf_event
*event
,
840 struct perf_event_ops
*ops
,
843 struct perf_sample sample
;
846 if (session
->header
.needs_swap
&&
847 perf_event__swap_ops
[event
->header
.type
])
848 perf_event__swap_ops
[event
->header
.type
](event
);
850 if (event
->header
.type
>= PERF_RECORD_HEADER_MAX
)
853 hists__inc_nr_events(&session
->hists
, event
->header
.type
);
855 if (event
->header
.type
>= PERF_RECORD_USER_TYPE_START
)
856 return perf_session__process_user_event(session
, event
, ops
, file_offset
);
859 * For all kernel events we get the sample data
861 ret
= perf_session__parse_sample(session
, event
, &sample
);
865 /* Preprocess sample records - precheck callchains */
866 if (perf_session__preprocess_sample(session
, event
, &sample
))
869 if (ops
->ordered_samples
) {
870 ret
= perf_session_queue_event(session
, event
, &sample
,
876 return perf_session_deliver_event(session
, event
, &sample
, ops
,
880 void perf_event_header__bswap(struct perf_event_header
*self
)
882 self
->type
= bswap_32(self
->type
);
883 self
->misc
= bswap_16(self
->misc
);
884 self
->size
= bswap_16(self
->size
);
887 static struct thread
*perf_session__register_idle_thread(struct perf_session
*self
)
889 struct thread
*thread
= perf_session__findnew(self
, 0);
891 if (thread
== NULL
|| thread__set_comm(thread
, "swapper")) {
892 pr_err("problem inserting idle task.\n");
899 static void perf_session__warn_about_errors(const struct perf_session
*session
,
900 const struct perf_event_ops
*ops
)
902 if (ops
->lost
== perf_event__process_lost
&&
903 session
->hists
.stats
.nr_events
[PERF_RECORD_LOST
] != 0) {
904 ui__warning("Processed %d events and lost %d chunks!\n\n"
905 "Check IO/CPU overload!\n\n",
906 session
->hists
.stats
.nr_events
[0],
907 session
->hists
.stats
.nr_events
[PERF_RECORD_LOST
]);
910 if (session
->hists
.stats
.nr_unknown_events
!= 0) {
911 ui__warning("Found %u unknown events!\n\n"
912 "Is this an older tool processing a perf.data "
913 "file generated by a more recent tool?\n\n"
914 "If that is not the case, consider "
915 "reporting to linux-kernel@vger.kernel.org.\n\n",
916 session
->hists
.stats
.nr_unknown_events
);
919 if (session
->hists
.stats
.nr_unknown_id
!= 0) {
920 ui__warning("%u samples with id not present in the header\n",
921 session
->hists
.stats
.nr_unknown_id
);
924 if (session
->hists
.stats
.nr_invalid_chains
!= 0) {
925 ui__warning("Found invalid callchains!\n\n"
926 "%u out of %u events were discarded for this reason.\n\n"
927 "Consider reporting to linux-kernel@vger.kernel.org.\n\n",
928 session
->hists
.stats
.nr_invalid_chains
,
929 session
->hists
.stats
.nr_events
[PERF_RECORD_SAMPLE
]);
933 #define session_done() (*(volatile int *)(&session_done))
934 volatile int session_done
;
936 static int __perf_session__process_pipe_events(struct perf_session
*self
,
937 struct perf_event_ops
*ops
)
939 union perf_event event
;
946 perf_event_ops__fill_defaults(ops
);
950 err
= readn(self
->fd
, &event
, sizeof(struct perf_event_header
));
955 pr_err("failed to read event header\n");
959 if (self
->header
.needs_swap
)
960 perf_event_header__bswap(&event
.header
);
962 size
= event
.header
.size
;
967 p
+= sizeof(struct perf_event_header
);
969 if (size
- sizeof(struct perf_event_header
)) {
970 err
= readn(self
->fd
, p
, size
- sizeof(struct perf_event_header
));
973 pr_err("unexpected end of event stream\n");
977 pr_err("failed to read event data\n");
983 (skip
= perf_session__process_event(self
, &event
, ops
, head
)) < 0) {
984 dump_printf("%#" PRIx64
" [%#x]: skipping unknown header type: %d\n",
985 head
, event
.header
.size
, event
.header
.type
);
987 * assume we lost track of the stream, check alignment, and
988 * increment a single u64 in the hope to catch on again 'soon'.
990 if (unlikely(head
& 7))
1001 if (!session_done())
1006 perf_session__warn_about_errors(self
, ops
);
1007 perf_session_free_sample_buffers(self
);
1011 static union perf_event
*
1012 fetch_mmaped_event(struct perf_session
*session
,
1013 u64 head
, size_t mmap_size
, char *buf
)
1015 union perf_event
*event
;
1018 * Ensure we have enough space remaining to read
1019 * the size of the event in the headers.
1021 if (head
+ sizeof(event
->header
) > mmap_size
)
1024 event
= (union perf_event
*)(buf
+ head
);
1026 if (session
->header
.needs_swap
)
1027 perf_event_header__bswap(&event
->header
);
1029 if (head
+ event
->header
.size
> mmap_size
)
1035 int __perf_session__process_events(struct perf_session
*session
,
1036 u64 data_offset
, u64 data_size
,
1037 u64 file_size
, struct perf_event_ops
*ops
)
1039 u64 head
, page_offset
, file_offset
, file_pos
, progress_next
;
1040 int err
, mmap_prot
, mmap_flags
, map_idx
= 0;
1041 size_t page_size
, mmap_size
;
1042 char *buf
, *mmaps
[8];
1043 union perf_event
*event
;
1046 perf_event_ops__fill_defaults(ops
);
1048 page_size
= sysconf(_SC_PAGESIZE
);
1050 page_offset
= page_size
* (data_offset
/ page_size
);
1051 file_offset
= page_offset
;
1052 head
= data_offset
- page_offset
;
1054 if (data_offset
+ data_size
< file_size
)
1055 file_size
= data_offset
+ data_size
;
1057 progress_next
= file_size
/ 16;
1059 mmap_size
= session
->mmap_window
;
1060 if (mmap_size
> file_size
)
1061 mmap_size
= file_size
;
1063 memset(mmaps
, 0, sizeof(mmaps
));
1065 mmap_prot
= PROT_READ
;
1066 mmap_flags
= MAP_SHARED
;
1068 if (session
->header
.needs_swap
) {
1069 mmap_prot
|= PROT_WRITE
;
1070 mmap_flags
= MAP_PRIVATE
;
1073 buf
= mmap(NULL
, mmap_size
, mmap_prot
, mmap_flags
, session
->fd
,
1075 if (buf
== MAP_FAILED
) {
1076 pr_err("failed to mmap file\n");
1080 mmaps
[map_idx
] = buf
;
1081 map_idx
= (map_idx
+ 1) & (ARRAY_SIZE(mmaps
) - 1);
1082 file_pos
= file_offset
+ head
;
1085 event
= fetch_mmaped_event(session
, head
, mmap_size
, buf
);
1087 if (mmaps
[map_idx
]) {
1088 munmap(mmaps
[map_idx
], mmap_size
);
1089 mmaps
[map_idx
] = NULL
;
1092 page_offset
= page_size
* (head
/ page_size
);
1093 file_offset
+= page_offset
;
1094 head
-= page_offset
;
1098 size
= event
->header
.size
;
1101 perf_session__process_event(session
, event
, ops
, file_pos
) < 0) {
1102 dump_printf("%#" PRIx64
" [%#x]: skipping unknown header type: %d\n",
1103 file_offset
+ head
, event
->header
.size
,
1104 event
->header
.type
);
1106 * assume we lost track of the stream, check alignment, and
1107 * increment a single u64 in the hope to catch on again 'soon'.
1109 if (unlikely(head
& 7))
1118 if (file_pos
>= progress_next
) {
1119 progress_next
+= file_size
/ 16;
1120 ui_progress__update(file_pos
, file_size
,
1121 "Processing events...");
1124 if (file_pos
< file_size
)
1128 /* do the final flush for ordered samples */
1129 session
->ordered_samples
.next_flush
= ULLONG_MAX
;
1130 flush_sample_queue(session
, ops
);
1132 perf_session__warn_about_errors(session
, ops
);
1133 perf_session_free_sample_buffers(session
);
1137 int perf_session__process_events(struct perf_session
*self
,
1138 struct perf_event_ops
*ops
)
1142 if (perf_session__register_idle_thread(self
) == NULL
)
1146 err
= __perf_session__process_events(self
,
1147 self
->header
.data_offset
,
1148 self
->header
.data_size
,
1151 err
= __perf_session__process_pipe_events(self
, ops
);
1156 bool perf_session__has_traces(struct perf_session
*self
, const char *msg
)
1158 if (!(self
->sample_type
& PERF_SAMPLE_RAW
)) {
1159 pr_err("No trace sample to read. Did you call 'perf %s'?\n", msg
);
1166 int perf_session__set_kallsyms_ref_reloc_sym(struct map
**maps
,
1167 const char *symbol_name
,
1172 struct ref_reloc_sym
*ref
;
1174 ref
= zalloc(sizeof(struct ref_reloc_sym
));
1178 ref
->name
= strdup(symbol_name
);
1179 if (ref
->name
== NULL
) {
1184 bracket
= strchr(ref
->name
, ']');
1190 for (i
= 0; i
< MAP__NR_TYPES
; ++i
) {
1191 struct kmap
*kmap
= map__kmap(maps
[i
]);
1192 kmap
->ref_reloc_sym
= ref
;
1198 size_t perf_session__fprintf_dsos(struct perf_session
*self
, FILE *fp
)
1200 return __dsos__fprintf(&self
->host_machine
.kernel_dsos
, fp
) +
1201 __dsos__fprintf(&self
->host_machine
.user_dsos
, fp
) +
1202 machines__fprintf_dsos(&self
->machines
, fp
);
1205 size_t perf_session__fprintf_dsos_buildid(struct perf_session
*self
, FILE *fp
,
1208 size_t ret
= machine__fprintf_dsos_buildid(&self
->host_machine
, fp
, with_hits
);
1209 return ret
+ machines__fprintf_dsos_buildid(&self
->machines
, fp
, with_hits
);
1212 size_t perf_session__fprintf_nr_events(struct perf_session
*session
, FILE *fp
)
1214 struct perf_evsel
*pos
;
1215 size_t ret
= fprintf(fp
, "Aggregated stats:\n");
1217 ret
+= hists__fprintf_nr_events(&session
->hists
, fp
);
1219 list_for_each_entry(pos
, &session
->evlist
->entries
, node
) {
1220 ret
+= fprintf(fp
, "%s stats:\n", event_name(pos
));
1221 ret
+= hists__fprintf_nr_events(&pos
->hists
, fp
);
1227 struct perf_evsel
*perf_session__find_first_evtype(struct perf_session
*session
,
1230 struct perf_evsel
*pos
;
1232 list_for_each_entry(pos
, &session
->evlist
->entries
, node
) {
1233 if (pos
->attr
.type
== type
)
1239 void perf_session__print_ip(union perf_event
*event
,
1240 struct perf_sample
*sample
,
1241 struct perf_session
*session
,
1242 int print_sym
, int print_dso
)
1244 struct addr_location al
;
1245 const char *symname
, *dsoname
;
1246 struct callchain_cursor
*cursor
= &session
->callchain_cursor
;
1247 struct callchain_cursor_node
*node
;
1249 if (perf_event__preprocess_sample(event
, session
, &al
, sample
,
1251 error("problem processing %d event, skipping it.\n",
1252 event
->header
.type
);
1256 if (symbol_conf
.use_callchain
&& sample
->callchain
) {
1258 if (perf_session__resolve_callchain(session
, al
.thread
,
1259 sample
->callchain
, NULL
) != 0) {
1261 error("Failed to resolve callchain. Skipping\n");
1264 callchain_cursor_commit(cursor
);
1267 node
= callchain_cursor_current(cursor
);
1271 printf("\t%16" PRIx64
, node
->ip
);
1273 if (node
->sym
&& node
->sym
->name
)
1274 symname
= node
->sym
->name
;
1278 printf(" %s", symname
);
1281 if (node
->map
&& node
->map
->dso
&& node
->map
->dso
->name
)
1282 dsoname
= node
->map
->dso
->name
;
1286 printf(" (%s)", dsoname
);
1290 callchain_cursor_advance(cursor
);
1294 printf("%16" PRIx64
, sample
->ip
);
1296 if (al
.sym
&& al
.sym
->name
)
1297 symname
= al
.sym
->name
;
1301 printf(" %s", symname
);
1305 if (al
.map
&& al
.map
->dso
&& al
.map
->dso
->name
)
1306 dsoname
= al
.map
->dso
->name
;
1310 printf(" (%s)", dsoname
);
1315 int perf_session__cpu_bitmap(struct perf_session
*session
,
1316 const char *cpu_list
, unsigned long *cpu_bitmap
)
1319 struct cpu_map
*map
;
1321 for (i
= 0; i
< PERF_TYPE_MAX
; ++i
) {
1322 struct perf_evsel
*evsel
;
1324 evsel
= perf_session__find_first_evtype(session
, i
);
1328 if (!(evsel
->attr
.sample_type
& PERF_SAMPLE_CPU
)) {
1329 pr_err("File does not contain CPU events. "
1330 "Remove -c option to proceed.\n");
1335 map
= cpu_map__new(cpu_list
);
1337 pr_err("Invalid cpu_list\n");
1341 for (i
= 0; i
< map
->nr
; i
++) {
1342 int cpu
= map
->map
[i
];
1344 if (cpu
>= MAX_NR_CPUS
) {
1345 pr_err("Requested CPU %d too large. "
1346 "Consider raising MAX_NR_CPUS\n", cpu
);
1350 set_bit(cpu
, cpu_bitmap
);
1356 void perf_session__fprintf_info(struct perf_session
*session
, FILE *fp
,
1362 if (session
== NULL
|| fp
== NULL
)
1365 ret
= fstat(session
->fd
, &st
);
1369 fprintf(fp
, "# ========\n");
1370 fprintf(fp
, "# captured on: %s", ctime(&st
.st_ctime
));
1371 perf_header__fprintf_info(session
, fp
, full
);
1372 fprintf(fp
, "# ========\n#\n");