1 #define _FILE_OFFSET_BITS 64
3 #include <linux/kernel.h>
17 #include "event-parse.h"
18 #include "perf_regs.h"
21 static int perf_session__open(struct perf_session
*self
, bool force
)
23 struct stat input_stat
;
25 if (!strcmp(self
->filename
, "-")) {
27 self
->fd
= STDIN_FILENO
;
29 if (perf_session__read_header(self
, self
->fd
) < 0)
30 pr_err("incompatible file format (rerun with -v to learn more)");
35 self
->fd
= open(self
->filename
, O_RDONLY
);
39 pr_err("failed to open %s: %s", self
->filename
, strerror(err
));
40 if (err
== ENOENT
&& !strcmp(self
->filename
, "perf.data"))
41 pr_err(" (try 'perf record' first)");
46 if (fstat(self
->fd
, &input_stat
) < 0)
49 if (!force
&& input_stat
.st_uid
&& (input_stat
.st_uid
!= geteuid())) {
50 pr_err("file %s not owned by current user or root\n",
55 if (!input_stat
.st_size
) {
56 pr_info("zero-sized file (%s), nothing to do!\n",
61 if (perf_session__read_header(self
, self
->fd
) < 0) {
62 pr_err("incompatible file format (rerun with -v to learn more)");
66 if (!perf_evlist__valid_sample_type(self
->evlist
)) {
67 pr_err("non matching sample_type");
71 if (!perf_evlist__valid_sample_id_all(self
->evlist
)) {
72 pr_err("non matching sample_id_all");
76 self
->size
= input_stat
.st_size
;
85 void perf_session__set_id_hdr_size(struct perf_session
*session
)
87 u16 id_hdr_size
= perf_evlist__id_hdr_size(session
->evlist
);
89 machines__set_id_hdr_size(&session
->machines
, id_hdr_size
);
92 int perf_session__create_kernel_maps(struct perf_session
*self
)
94 int ret
= machine__create_kernel_maps(&self
->machines
.host
);
97 ret
= machines__create_guest_kernel_maps(&self
->machines
);
101 static void perf_session__destroy_kernel_maps(struct perf_session
*self
)
103 machines__destroy_kernel_maps(&self
->machines
);
106 struct perf_session
*perf_session__new(const char *filename
, int mode
,
107 bool force
, bool repipe
,
108 struct perf_tool
*tool
)
110 struct perf_session
*self
;
114 if (!filename
|| !strlen(filename
)) {
115 if (!fstat(STDIN_FILENO
, &st
) && S_ISFIFO(st
.st_mode
))
118 filename
= "perf.data";
121 len
= strlen(filename
);
122 self
= zalloc(sizeof(*self
) + len
);
127 memcpy(self
->filename
, filename
, len
);
128 self
->repipe
= repipe
;
129 INIT_LIST_HEAD(&self
->ordered_samples
.samples
);
130 INIT_LIST_HEAD(&self
->ordered_samples
.sample_cache
);
131 INIT_LIST_HEAD(&self
->ordered_samples
.to_free
);
132 machines__init(&self
->machines
);
134 if (mode
== O_RDONLY
) {
135 if (perf_session__open(self
, force
) < 0)
137 perf_session__set_id_hdr_size(self
);
138 } else if (mode
== O_WRONLY
) {
140 * In O_RDONLY mode this will be performed when reading the
141 * kernel MMAP event, in perf_event__process_mmap().
143 if (perf_session__create_kernel_maps(self
) < 0)
147 if (tool
&& tool
->ordering_requires_timestamps
&&
148 tool
->ordered_samples
&& !perf_evlist__sample_id_all(self
->evlist
)) {
149 dump_printf("WARNING: No sample_id_all support, falling back to unordered processing\n");
150 tool
->ordered_samples
= false;
156 perf_session__delete(self
);
160 static void perf_session__delete_dead_threads(struct perf_session
*session
)
162 machine__delete_dead_threads(&session
->machines
.host
);
165 static void perf_session__delete_threads(struct perf_session
*session
)
167 machine__delete_threads(&session
->machines
.host
);
170 static void perf_session_env__delete(struct perf_session_env
*env
)
173 free(env
->os_release
);
180 free(env
->sibling_cores
);
181 free(env
->sibling_threads
);
182 free(env
->numa_nodes
);
183 free(env
->pmu_mappings
);
186 void perf_session__delete(struct perf_session
*self
)
188 perf_session__destroy_kernel_maps(self
);
189 perf_session__delete_dead_threads(self
);
190 perf_session__delete_threads(self
);
191 perf_session_env__delete(&self
->header
.env
);
192 machines__exit(&self
->machines
);
198 static int process_event_synth_tracing_data_stub(union perf_event
*event
200 struct perf_session
*session
203 dump_printf(": unhandled!\n");
207 static int process_event_synth_attr_stub(union perf_event
*event __maybe_unused
,
208 struct perf_evlist
**pevlist
211 dump_printf(": unhandled!\n");
215 static int process_event_sample_stub(struct perf_tool
*tool __maybe_unused
,
216 union perf_event
*event __maybe_unused
,
217 struct perf_sample
*sample __maybe_unused
,
218 struct perf_evsel
*evsel __maybe_unused
,
219 struct machine
*machine __maybe_unused
)
221 dump_printf(": unhandled!\n");
225 static int process_event_stub(struct perf_tool
*tool __maybe_unused
,
226 union perf_event
*event __maybe_unused
,
227 struct perf_sample
*sample __maybe_unused
,
228 struct machine
*machine __maybe_unused
)
230 dump_printf(": unhandled!\n");
234 static int process_finished_round_stub(struct perf_tool
*tool __maybe_unused
,
235 union perf_event
*event __maybe_unused
,
236 struct perf_session
*perf_session
239 dump_printf(": unhandled!\n");
243 static int process_event_type_stub(struct perf_tool
*tool __maybe_unused
,
244 union perf_event
*event __maybe_unused
)
246 dump_printf(": unhandled!\n");
250 static int process_finished_round(struct perf_tool
*tool
,
251 union perf_event
*event
,
252 struct perf_session
*session
);
254 static void perf_tool__fill_defaults(struct perf_tool
*tool
)
256 if (tool
->sample
== NULL
)
257 tool
->sample
= process_event_sample_stub
;
258 if (tool
->mmap
== NULL
)
259 tool
->mmap
= process_event_stub
;
260 if (tool
->comm
== NULL
)
261 tool
->comm
= process_event_stub
;
262 if (tool
->fork
== NULL
)
263 tool
->fork
= process_event_stub
;
264 if (tool
->exit
== NULL
)
265 tool
->exit
= process_event_stub
;
266 if (tool
->lost
== NULL
)
267 tool
->lost
= perf_event__process_lost
;
268 if (tool
->read
== NULL
)
269 tool
->read
= process_event_sample_stub
;
270 if (tool
->throttle
== NULL
)
271 tool
->throttle
= process_event_stub
;
272 if (tool
->unthrottle
== NULL
)
273 tool
->unthrottle
= process_event_stub
;
274 if (tool
->attr
== NULL
)
275 tool
->attr
= process_event_synth_attr_stub
;
276 if (tool
->event_type
== NULL
)
277 tool
->event_type
= process_event_type_stub
;
278 if (tool
->tracing_data
== NULL
)
279 tool
->tracing_data
= process_event_synth_tracing_data_stub
;
280 if (tool
->build_id
== NULL
)
281 tool
->build_id
= process_finished_round_stub
;
282 if (tool
->finished_round
== NULL
) {
283 if (tool
->ordered_samples
)
284 tool
->finished_round
= process_finished_round
;
286 tool
->finished_round
= process_finished_round_stub
;
290 void mem_bswap_32(void *src
, int byte_size
)
293 while (byte_size
> 0) {
295 byte_size
-= sizeof(u32
);
300 void mem_bswap_64(void *src
, int byte_size
)
304 while (byte_size
> 0) {
306 byte_size
-= sizeof(u64
);
311 static void swap_sample_id_all(union perf_event
*event
, void *data
)
313 void *end
= (void *) event
+ event
->header
.size
;
314 int size
= end
- data
;
316 BUG_ON(size
% sizeof(u64
));
317 mem_bswap_64(data
, size
);
320 static void perf_event__all64_swap(union perf_event
*event
,
321 bool sample_id_all __maybe_unused
)
323 struct perf_event_header
*hdr
= &event
->header
;
324 mem_bswap_64(hdr
+ 1, event
->header
.size
- sizeof(*hdr
));
327 static void perf_event__comm_swap(union perf_event
*event
, bool sample_id_all
)
329 event
->comm
.pid
= bswap_32(event
->comm
.pid
);
330 event
->comm
.tid
= bswap_32(event
->comm
.tid
);
333 void *data
= &event
->comm
.comm
;
335 data
+= PERF_ALIGN(strlen(data
) + 1, sizeof(u64
));
336 swap_sample_id_all(event
, data
);
340 static void perf_event__mmap_swap(union perf_event
*event
,
343 event
->mmap
.pid
= bswap_32(event
->mmap
.pid
);
344 event
->mmap
.tid
= bswap_32(event
->mmap
.tid
);
345 event
->mmap
.start
= bswap_64(event
->mmap
.start
);
346 event
->mmap
.len
= bswap_64(event
->mmap
.len
);
347 event
->mmap
.pgoff
= bswap_64(event
->mmap
.pgoff
);
350 void *data
= &event
->mmap
.filename
;
352 data
+= PERF_ALIGN(strlen(data
) + 1, sizeof(u64
));
353 swap_sample_id_all(event
, data
);
357 static void perf_event__task_swap(union perf_event
*event
, bool sample_id_all
)
359 event
->fork
.pid
= bswap_32(event
->fork
.pid
);
360 event
->fork
.tid
= bswap_32(event
->fork
.tid
);
361 event
->fork
.ppid
= bswap_32(event
->fork
.ppid
);
362 event
->fork
.ptid
= bswap_32(event
->fork
.ptid
);
363 event
->fork
.time
= bswap_64(event
->fork
.time
);
366 swap_sample_id_all(event
, &event
->fork
+ 1);
369 static void perf_event__read_swap(union perf_event
*event
, bool sample_id_all
)
371 event
->read
.pid
= bswap_32(event
->read
.pid
);
372 event
->read
.tid
= bswap_32(event
->read
.tid
);
373 event
->read
.value
= bswap_64(event
->read
.value
);
374 event
->read
.time_enabled
= bswap_64(event
->read
.time_enabled
);
375 event
->read
.time_running
= bswap_64(event
->read
.time_running
);
376 event
->read
.id
= bswap_64(event
->read
.id
);
379 swap_sample_id_all(event
, &event
->read
+ 1);
382 static u8
revbyte(u8 b
)
384 int rev
= (b
>> 4) | ((b
& 0xf) << 4);
385 rev
= ((rev
& 0xcc) >> 2) | ((rev
& 0x33) << 2);
386 rev
= ((rev
& 0xaa) >> 1) | ((rev
& 0x55) << 1);
391 * XXX this is hack in attempt to carry flags bitfield
392 * throught endian village. ABI says:
394 * Bit-fields are allocated from right to left (least to most significant)
395 * on little-endian implementations and from left to right (most to least
396 * significant) on big-endian implementations.
398 * The above seems to be byte specific, so we need to reverse each
399 * byte of the bitfield. 'Internet' also says this might be implementation
400 * specific and we probably need proper fix and carry perf_event_attr
401 * bitfield flags in separate data file FEAT_ section. Thought this seems
404 static void swap_bitfield(u8
*p
, unsigned len
)
408 for (i
= 0; i
< len
; i
++) {
414 /* exported for swapping attributes in file header */
415 void perf_event__attr_swap(struct perf_event_attr
*attr
)
417 attr
->type
= bswap_32(attr
->type
);
418 attr
->size
= bswap_32(attr
->size
);
419 attr
->config
= bswap_64(attr
->config
);
420 attr
->sample_period
= bswap_64(attr
->sample_period
);
421 attr
->sample_type
= bswap_64(attr
->sample_type
);
422 attr
->read_format
= bswap_64(attr
->read_format
);
423 attr
->wakeup_events
= bswap_32(attr
->wakeup_events
);
424 attr
->bp_type
= bswap_32(attr
->bp_type
);
425 attr
->bp_addr
= bswap_64(attr
->bp_addr
);
426 attr
->bp_len
= bswap_64(attr
->bp_len
);
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_COMM
] = perf_event__comm_swap
,
462 [PERF_RECORD_FORK
] = perf_event__task_swap
,
463 [PERF_RECORD_EXIT
] = perf_event__task_swap
,
464 [PERF_RECORD_LOST
] = perf_event__all64_swap
,
465 [PERF_RECORD_READ
] = perf_event__read_swap
,
466 [PERF_RECORD_SAMPLE
] = perf_event__all64_swap
,
467 [PERF_RECORD_HEADER_ATTR
] = perf_event__hdr_attr_swap
,
468 [PERF_RECORD_HEADER_EVENT_TYPE
] = perf_event__event_type_swap
,
469 [PERF_RECORD_HEADER_TRACING_DATA
] = perf_event__tracing_data_swap
,
470 [PERF_RECORD_HEADER_BUILD_ID
] = NULL
,
471 [PERF_RECORD_HEADER_MAX
] = NULL
,
474 struct sample_queue
{
477 union perf_event
*event
;
478 struct list_head list
;
481 static void perf_session_free_sample_buffers(struct perf_session
*session
)
483 struct ordered_samples
*os
= &session
->ordered_samples
;
485 while (!list_empty(&os
->to_free
)) {
486 struct sample_queue
*sq
;
488 sq
= list_entry(os
->to_free
.next
, struct sample_queue
, list
);
494 static int perf_session_deliver_event(struct perf_session
*session
,
495 union perf_event
*event
,
496 struct perf_sample
*sample
,
497 struct perf_tool
*tool
,
500 static int flush_sample_queue(struct perf_session
*s
,
501 struct perf_tool
*tool
)
503 struct ordered_samples
*os
= &s
->ordered_samples
;
504 struct list_head
*head
= &os
->samples
;
505 struct sample_queue
*tmp
, *iter
;
506 struct perf_sample sample
;
507 u64 limit
= os
->next_flush
;
508 u64 last_ts
= os
->last_sample
? os
->last_sample
->timestamp
: 0ULL;
509 unsigned idx
= 0, progress_next
= os
->nr_samples
/ 16;
512 if (!tool
->ordered_samples
|| !limit
)
515 list_for_each_entry_safe(iter
, tmp
, head
, list
) {
516 if (iter
->timestamp
> limit
)
519 ret
= perf_evlist__parse_sample(s
->evlist
, iter
->event
, &sample
);
521 pr_err("Can't parse sample, err = %d\n", ret
);
523 ret
= perf_session_deliver_event(s
, iter
->event
, &sample
, tool
,
529 os
->last_flush
= iter
->timestamp
;
530 list_del(&iter
->list
);
531 list_add(&iter
->list
, &os
->sample_cache
);
532 if (++idx
>= progress_next
) {
533 progress_next
+= os
->nr_samples
/ 16;
534 ui_progress__update(idx
, os
->nr_samples
,
535 "Processing time ordered events...");
539 if (list_empty(head
)) {
540 os
->last_sample
= NULL
;
541 } else if (last_ts
<= limit
) {
543 list_entry(head
->prev
, struct sample_queue
, list
);
552 * When perf record finishes a pass on every buffers, it records this pseudo
554 * We record the max timestamp t found in the pass n.
555 * Assuming these timestamps are monotonic across cpus, we know that if
556 * a buffer still has events with timestamps below t, they will be all
557 * available and then read in the pass n + 1.
558 * Hence when we start to read the pass n + 2, we can safely flush every
559 * events with timestamps below t.
561 * ============ PASS n =================
564 * cnt1 timestamps | cnt2 timestamps
567 * - | 4 <--- max recorded
569 * ============ PASS n + 1 ==============
572 * cnt1 timestamps | cnt2 timestamps
575 * 5 | 7 <---- max recorded
577 * Flush every events below timestamp 4
579 * ============ PASS n + 2 ==============
582 * cnt1 timestamps | cnt2 timestamps
587 * Flush every events below timestamp 7
590 static int process_finished_round(struct perf_tool
*tool
,
591 union perf_event
*event __maybe_unused
,
592 struct perf_session
*session
)
594 int ret
= flush_sample_queue(session
, tool
);
596 session
->ordered_samples
.next_flush
= session
->ordered_samples
.max_timestamp
;
601 /* The queue is ordered by time */
602 static void __queue_event(struct sample_queue
*new, struct perf_session
*s
)
604 struct ordered_samples
*os
= &s
->ordered_samples
;
605 struct sample_queue
*sample
= os
->last_sample
;
606 u64 timestamp
= new->timestamp
;
610 os
->last_sample
= new;
613 list_add(&new->list
, &os
->samples
);
614 os
->max_timestamp
= timestamp
;
619 * last_sample might point to some random place in the list as it's
620 * the last queued event. We expect that the new event is close to
623 if (sample
->timestamp
<= timestamp
) {
624 while (sample
->timestamp
<= timestamp
) {
625 p
= sample
->list
.next
;
626 if (p
== &os
->samples
) {
627 list_add_tail(&new->list
, &os
->samples
);
628 os
->max_timestamp
= timestamp
;
631 sample
= list_entry(p
, struct sample_queue
, list
);
633 list_add_tail(&new->list
, &sample
->list
);
635 while (sample
->timestamp
> timestamp
) {
636 p
= sample
->list
.prev
;
637 if (p
== &os
->samples
) {
638 list_add(&new->list
, &os
->samples
);
641 sample
= list_entry(p
, struct sample_queue
, list
);
643 list_add(&new->list
, &sample
->list
);
647 #define MAX_SAMPLE_BUFFER (64 * 1024 / sizeof(struct sample_queue))
649 static int perf_session_queue_event(struct perf_session
*s
, union perf_event
*event
,
650 struct perf_sample
*sample
, u64 file_offset
)
652 struct ordered_samples
*os
= &s
->ordered_samples
;
653 struct list_head
*sc
= &os
->sample_cache
;
654 u64 timestamp
= sample
->time
;
655 struct sample_queue
*new;
657 if (!timestamp
|| timestamp
== ~0ULL)
660 if (timestamp
< s
->ordered_samples
.last_flush
) {
661 printf("Warning: Timestamp below last timeslice flush\n");
665 if (!list_empty(sc
)) {
666 new = list_entry(sc
->next
, struct sample_queue
, list
);
667 list_del(&new->list
);
668 } else if (os
->sample_buffer
) {
669 new = os
->sample_buffer
+ os
->sample_buffer_idx
;
670 if (++os
->sample_buffer_idx
== MAX_SAMPLE_BUFFER
)
671 os
->sample_buffer
= NULL
;
673 os
->sample_buffer
= malloc(MAX_SAMPLE_BUFFER
* sizeof(*new));
674 if (!os
->sample_buffer
)
676 list_add(&os
->sample_buffer
->list
, &os
->to_free
);
677 os
->sample_buffer_idx
= 2;
678 new = os
->sample_buffer
+ 1;
681 new->timestamp
= timestamp
;
682 new->file_offset
= file_offset
;
685 __queue_event(new, s
);
690 static void callchain__printf(struct perf_sample
*sample
)
694 printf("... chain: nr:%" PRIu64
"\n", sample
->callchain
->nr
);
696 for (i
= 0; i
< sample
->callchain
->nr
; i
++)
697 printf("..... %2d: %016" PRIx64
"\n",
698 i
, sample
->callchain
->ips
[i
]);
701 static void branch_stack__printf(struct perf_sample
*sample
)
705 printf("... branch stack: nr:%" PRIu64
"\n", sample
->branch_stack
->nr
);
707 for (i
= 0; i
< sample
->branch_stack
->nr
; i
++)
708 printf("..... %2"PRIu64
": %016" PRIx64
" -> %016" PRIx64
"\n",
709 i
, sample
->branch_stack
->entries
[i
].from
,
710 sample
->branch_stack
->entries
[i
].to
);
713 static void regs_dump__printf(u64 mask
, u64
*regs
)
717 for_each_set_bit(rid
, (unsigned long *) &mask
, sizeof(mask
) * 8) {
720 printf(".... %-5s 0x%" PRIx64
"\n",
721 perf_reg_name(rid
), val
);
725 static void regs_user__printf(struct perf_sample
*sample
, u64 mask
)
727 struct regs_dump
*user_regs
= &sample
->user_regs
;
729 if (user_regs
->regs
) {
730 printf("... user regs: mask 0x%" PRIx64
"\n", mask
);
731 regs_dump__printf(mask
, user_regs
->regs
);
735 static void stack_user__printf(struct stack_dump
*dump
)
737 printf("... ustack: size %" PRIu64
", offset 0x%x\n",
738 dump
->size
, dump
->offset
);
741 static void perf_session__print_tstamp(struct perf_session
*session
,
742 union perf_event
*event
,
743 struct perf_sample
*sample
)
745 u64 sample_type
= perf_evlist__sample_type(session
->evlist
);
747 if (event
->header
.type
!= PERF_RECORD_SAMPLE
&&
748 !perf_evlist__sample_id_all(session
->evlist
)) {
749 fputs("-1 -1 ", stdout
);
753 if ((sample_type
& PERF_SAMPLE_CPU
))
754 printf("%u ", sample
->cpu
);
756 if (sample_type
& PERF_SAMPLE_TIME
)
757 printf("%" PRIu64
" ", sample
->time
);
760 static void dump_event(struct perf_session
*session
, union perf_event
*event
,
761 u64 file_offset
, struct perf_sample
*sample
)
766 printf("\n%#" PRIx64
" [%#x]: event: %d\n",
767 file_offset
, event
->header
.size
, event
->header
.type
);
772 perf_session__print_tstamp(session
, event
, sample
);
774 printf("%#" PRIx64
" [%#x]: PERF_RECORD_%s", file_offset
,
775 event
->header
.size
, perf_event__name(event
->header
.type
));
778 static void dump_sample(struct perf_evsel
*evsel
, union perf_event
*event
,
779 struct perf_sample
*sample
)
786 printf("(IP, %d): %d/%d: %#" PRIx64
" period: %" PRIu64
" addr: %#" PRIx64
"\n",
787 event
->header
.misc
, sample
->pid
, sample
->tid
, sample
->ip
,
788 sample
->period
, sample
->addr
);
790 sample_type
= evsel
->attr
.sample_type
;
792 if (sample_type
& PERF_SAMPLE_CALLCHAIN
)
793 callchain__printf(sample
);
795 if (sample_type
& PERF_SAMPLE_BRANCH_STACK
)
796 branch_stack__printf(sample
);
798 if (sample_type
& PERF_SAMPLE_REGS_USER
)
799 regs_user__printf(sample
, evsel
->attr
.sample_regs_user
);
801 if (sample_type
& PERF_SAMPLE_STACK_USER
)
802 stack_user__printf(&sample
->user_stack
);
805 static struct machine
*
806 perf_session__find_machine_for_cpumode(struct perf_session
*session
,
807 union perf_event
*event
)
809 const u8 cpumode
= event
->header
.misc
& PERF_RECORD_MISC_CPUMODE_MASK
;
812 ((cpumode
== PERF_RECORD_MISC_GUEST_KERNEL
) ||
813 (cpumode
== PERF_RECORD_MISC_GUEST_USER
))) {
816 if (event
->header
.type
== PERF_RECORD_MMAP
)
817 pid
= event
->mmap
.pid
;
821 return perf_session__findnew_machine(session
, pid
);
824 return perf_session__find_host_machine(session
);
827 static int perf_session_deliver_event(struct perf_session
*session
,
828 union perf_event
*event
,
829 struct perf_sample
*sample
,
830 struct perf_tool
*tool
,
833 struct perf_evsel
*evsel
;
834 struct machine
*machine
;
836 dump_event(session
, event
, file_offset
, sample
);
838 evsel
= perf_evlist__id2evsel(session
->evlist
, sample
->id
);
839 if (evsel
!= NULL
&& event
->header
.type
!= PERF_RECORD_SAMPLE
) {
841 * XXX We're leaving PERF_RECORD_SAMPLE unnacounted here
842 * because the tools right now may apply filters, discarding
843 * some of the samples. For consistency, in the future we
844 * should have something like nr_filtered_samples and remove
845 * the sample->period from total_sample_period, etc, KISS for
848 * Also testing against NULL allows us to handle files without
849 * attr.sample_id_all and/or without PERF_SAMPLE_ID. In the
850 * future probably it'll be a good idea to restrict event
851 * processing via perf_session to files with both set.
853 hists__inc_nr_events(&evsel
->hists
, event
->header
.type
);
856 machine
= perf_session__find_machine_for_cpumode(session
, event
);
858 switch (event
->header
.type
) {
859 case PERF_RECORD_SAMPLE
:
860 dump_sample(evsel
, event
, sample
);
862 ++session
->stats
.nr_unknown_id
;
865 if (machine
== NULL
) {
866 ++session
->stats
.nr_unprocessable_samples
;
869 return tool
->sample(tool
, event
, sample
, evsel
, machine
);
870 case PERF_RECORD_MMAP
:
871 return tool
->mmap(tool
, event
, sample
, machine
);
872 case PERF_RECORD_COMM
:
873 return tool
->comm(tool
, event
, sample
, machine
);
874 case PERF_RECORD_FORK
:
875 return tool
->fork(tool
, event
, sample
, machine
);
876 case PERF_RECORD_EXIT
:
877 return tool
->exit(tool
, event
, sample
, machine
);
878 case PERF_RECORD_LOST
:
879 if (tool
->lost
== perf_event__process_lost
)
880 session
->stats
.total_lost
+= event
->lost
.lost
;
881 return tool
->lost(tool
, event
, sample
, machine
);
882 case PERF_RECORD_READ
:
883 return tool
->read(tool
, event
, sample
, evsel
, machine
);
884 case PERF_RECORD_THROTTLE
:
885 return tool
->throttle(tool
, event
, sample
, machine
);
886 case PERF_RECORD_UNTHROTTLE
:
887 return tool
->unthrottle(tool
, event
, sample
, machine
);
889 ++session
->stats
.nr_unknown_events
;
894 static int perf_session__preprocess_sample(struct perf_session
*session
,
895 union perf_event
*event
, struct perf_sample
*sample
)
897 if (event
->header
.type
!= PERF_RECORD_SAMPLE
||
898 !(perf_evlist__sample_type(session
->evlist
) & PERF_SAMPLE_CALLCHAIN
))
901 if (!ip_callchain__valid(sample
->callchain
, event
)) {
902 pr_debug("call-chain problem with event, skipping it.\n");
903 ++session
->stats
.nr_invalid_chains
;
904 session
->stats
.total_invalid_chains
+= sample
->period
;
910 static int perf_session__process_user_event(struct perf_session
*session
, union perf_event
*event
,
911 struct perf_tool
*tool
, u64 file_offset
)
915 dump_event(session
, event
, file_offset
, NULL
);
917 /* These events are processed right away */
918 switch (event
->header
.type
) {
919 case PERF_RECORD_HEADER_ATTR
:
920 err
= tool
->attr(event
, &session
->evlist
);
922 perf_session__set_id_hdr_size(session
);
924 case PERF_RECORD_HEADER_EVENT_TYPE
:
925 return tool
->event_type(tool
, event
);
926 case PERF_RECORD_HEADER_TRACING_DATA
:
927 /* setup for reading amidst mmap */
928 lseek(session
->fd
, file_offset
, SEEK_SET
);
929 return tool
->tracing_data(event
, session
);
930 case PERF_RECORD_HEADER_BUILD_ID
:
931 return tool
->build_id(tool
, event
, session
);
932 case PERF_RECORD_FINISHED_ROUND
:
933 return tool
->finished_round(tool
, event
, session
);
939 static void event_swap(union perf_event
*event
, bool sample_id_all
)
941 perf_event__swap_op swap
;
943 swap
= perf_event__swap_ops
[event
->header
.type
];
945 swap(event
, sample_id_all
);
948 static int perf_session__process_event(struct perf_session
*session
,
949 union perf_event
*event
,
950 struct perf_tool
*tool
,
953 struct perf_sample sample
;
956 if (session
->header
.needs_swap
)
957 event_swap(event
, perf_evlist__sample_id_all(session
->evlist
));
959 if (event
->header
.type
>= PERF_RECORD_HEADER_MAX
)
962 events_stats__inc(&session
->stats
, event
->header
.type
);
964 if (event
->header
.type
>= PERF_RECORD_USER_TYPE_START
)
965 return perf_session__process_user_event(session
, event
, tool
, file_offset
);
968 * For all kernel events we get the sample data
970 ret
= perf_evlist__parse_sample(session
->evlist
, event
, &sample
);
974 /* Preprocess sample records - precheck callchains */
975 if (perf_session__preprocess_sample(session
, event
, &sample
))
978 if (tool
->ordered_samples
) {
979 ret
= perf_session_queue_event(session
, event
, &sample
,
985 return perf_session_deliver_event(session
, event
, &sample
, tool
,
989 void perf_event_header__bswap(struct perf_event_header
*self
)
991 self
->type
= bswap_32(self
->type
);
992 self
->misc
= bswap_16(self
->misc
);
993 self
->size
= bswap_16(self
->size
);
996 struct thread
*perf_session__findnew(struct perf_session
*session
, pid_t pid
)
998 return machine__findnew_thread(&session
->machines
.host
, pid
);
1001 static struct thread
*perf_session__register_idle_thread(struct perf_session
*self
)
1003 struct thread
*thread
= perf_session__findnew(self
, 0);
1005 if (thread
== NULL
|| thread__set_comm(thread
, "swapper")) {
1006 pr_err("problem inserting idle task.\n");
1013 static void perf_session__warn_about_errors(const struct perf_session
*session
,
1014 const struct perf_tool
*tool
)
1016 if (tool
->lost
== perf_event__process_lost
&&
1017 session
->stats
.nr_events
[PERF_RECORD_LOST
] != 0) {
1018 ui__warning("Processed %d events and lost %d chunks!\n\n"
1019 "Check IO/CPU overload!\n\n",
1020 session
->stats
.nr_events
[0],
1021 session
->stats
.nr_events
[PERF_RECORD_LOST
]);
1024 if (session
->stats
.nr_unknown_events
!= 0) {
1025 ui__warning("Found %u unknown events!\n\n"
1026 "Is this an older tool processing a perf.data "
1027 "file generated by a more recent tool?\n\n"
1028 "If that is not the case, consider "
1029 "reporting to linux-kernel@vger.kernel.org.\n\n",
1030 session
->stats
.nr_unknown_events
);
1033 if (session
->stats
.nr_unknown_id
!= 0) {
1034 ui__warning("%u samples with id not present in the header\n",
1035 session
->stats
.nr_unknown_id
);
1038 if (session
->stats
.nr_invalid_chains
!= 0) {
1039 ui__warning("Found invalid callchains!\n\n"
1040 "%u out of %u events were discarded for this reason.\n\n"
1041 "Consider reporting to linux-kernel@vger.kernel.org.\n\n",
1042 session
->stats
.nr_invalid_chains
,
1043 session
->stats
.nr_events
[PERF_RECORD_SAMPLE
]);
1046 if (session
->stats
.nr_unprocessable_samples
!= 0) {
1047 ui__warning("%u unprocessable samples recorded.\n"
1048 "Do you have a KVM guest running and not using 'perf kvm'?\n",
1049 session
->stats
.nr_unprocessable_samples
);
1053 #define session_done() (*(volatile int *)(&session_done))
1054 volatile int session_done
;
1056 static int __perf_session__process_pipe_events(struct perf_session
*self
,
1057 struct perf_tool
*tool
)
1059 union perf_event
*event
;
1060 uint32_t size
, cur_size
= 0;
1067 perf_tool__fill_defaults(tool
);
1070 cur_size
= sizeof(union perf_event
);
1072 buf
= malloc(cur_size
);
1077 err
= readn(self
->fd
, event
, sizeof(struct perf_event_header
));
1082 pr_err("failed to read event header\n");
1086 if (self
->header
.needs_swap
)
1087 perf_event_header__bswap(&event
->header
);
1089 size
= event
->header
.size
;
1093 if (size
> cur_size
) {
1094 void *new = realloc(buf
, size
);
1096 pr_err("failed to allocate memory to read event\n");
1104 p
+= sizeof(struct perf_event_header
);
1106 if (size
- sizeof(struct perf_event_header
)) {
1107 err
= readn(self
->fd
, p
, size
- sizeof(struct perf_event_header
));
1110 pr_err("unexpected end of event stream\n");
1114 pr_err("failed to read event data\n");
1119 if ((skip
= perf_session__process_event(self
, event
, tool
, head
)) < 0) {
1120 pr_err("%#" PRIx64
" [%#x]: failed to process type: %d\n",
1121 head
, event
->header
.size
, event
->header
.type
);
1131 if (!session_done())
1137 perf_session__warn_about_errors(self
, tool
);
1138 perf_session_free_sample_buffers(self
);
1142 static union perf_event
*
1143 fetch_mmaped_event(struct perf_session
*session
,
1144 u64 head
, size_t mmap_size
, char *buf
)
1146 union perf_event
*event
;
1149 * Ensure we have enough space remaining to read
1150 * the size of the event in the headers.
1152 if (head
+ sizeof(event
->header
) > mmap_size
)
1155 event
= (union perf_event
*)(buf
+ head
);
1157 if (session
->header
.needs_swap
)
1158 perf_event_header__bswap(&event
->header
);
1160 if (head
+ event
->header
.size
> mmap_size
)
1167 * On 64bit we can mmap the data file in one go. No need for tiny mmap
1168 * slices. On 32bit we use 32MB.
1170 #if BITS_PER_LONG == 64
1171 #define MMAP_SIZE ULLONG_MAX
1174 #define MMAP_SIZE (32 * 1024 * 1024ULL)
1175 #define NUM_MMAPS 128
1178 int __perf_session__process_events(struct perf_session
*session
,
1179 u64 data_offset
, u64 data_size
,
1180 u64 file_size
, struct perf_tool
*tool
)
1182 u64 head
, page_offset
, file_offset
, file_pos
, progress_next
;
1183 int err
, mmap_prot
, mmap_flags
, map_idx
= 0;
1185 char *buf
, *mmaps
[NUM_MMAPS
];
1186 union perf_event
*event
;
1189 perf_tool__fill_defaults(tool
);
1191 page_offset
= page_size
* (data_offset
/ page_size
);
1192 file_offset
= page_offset
;
1193 head
= data_offset
- page_offset
;
1195 if (data_offset
+ data_size
< file_size
)
1196 file_size
= data_offset
+ data_size
;
1198 progress_next
= file_size
/ 16;
1200 mmap_size
= MMAP_SIZE
;
1201 if (mmap_size
> file_size
)
1202 mmap_size
= file_size
;
1204 memset(mmaps
, 0, sizeof(mmaps
));
1206 mmap_prot
= PROT_READ
;
1207 mmap_flags
= MAP_SHARED
;
1209 if (session
->header
.needs_swap
) {
1210 mmap_prot
|= PROT_WRITE
;
1211 mmap_flags
= MAP_PRIVATE
;
1214 buf
= mmap(NULL
, mmap_size
, mmap_prot
, mmap_flags
, session
->fd
,
1216 if (buf
== MAP_FAILED
) {
1217 pr_err("failed to mmap file\n");
1221 mmaps
[map_idx
] = buf
;
1222 map_idx
= (map_idx
+ 1) & (ARRAY_SIZE(mmaps
) - 1);
1223 file_pos
= file_offset
+ head
;
1226 event
= fetch_mmaped_event(session
, head
, mmap_size
, buf
);
1228 if (mmaps
[map_idx
]) {
1229 munmap(mmaps
[map_idx
], mmap_size
);
1230 mmaps
[map_idx
] = NULL
;
1233 page_offset
= page_size
* (head
/ page_size
);
1234 file_offset
+= page_offset
;
1235 head
-= page_offset
;
1239 size
= event
->header
.size
;
1242 perf_session__process_event(session
, event
, tool
, file_pos
) < 0) {
1243 pr_err("%#" PRIx64
" [%#x]: failed to process type: %d\n",
1244 file_offset
+ head
, event
->header
.size
,
1245 event
->header
.type
);
1253 if (file_pos
>= progress_next
) {
1254 progress_next
+= file_size
/ 16;
1255 ui_progress__update(file_pos
, file_size
,
1256 "Processing events...");
1259 if (file_pos
< file_size
)
1263 /* do the final flush for ordered samples */
1264 session
->ordered_samples
.next_flush
= ULLONG_MAX
;
1265 err
= flush_sample_queue(session
, tool
);
1267 ui_progress__finish();
1268 perf_session__warn_about_errors(session
, tool
);
1269 perf_session_free_sample_buffers(session
);
1273 int perf_session__process_events(struct perf_session
*self
,
1274 struct perf_tool
*tool
)
1278 if (perf_session__register_idle_thread(self
) == NULL
)
1282 err
= __perf_session__process_events(self
,
1283 self
->header
.data_offset
,
1284 self
->header
.data_size
,
1287 err
= __perf_session__process_pipe_events(self
, tool
);
1292 bool perf_session__has_traces(struct perf_session
*session
, const char *msg
)
1294 if (!(perf_evlist__sample_type(session
->evlist
) & PERF_SAMPLE_RAW
)) {
1295 pr_err("No trace sample to read. Did you call 'perf %s'?\n", msg
);
1302 int maps__set_kallsyms_ref_reloc_sym(struct map
**maps
,
1303 const char *symbol_name
, u64 addr
)
1307 struct ref_reloc_sym
*ref
;
1309 ref
= zalloc(sizeof(struct ref_reloc_sym
));
1313 ref
->name
= strdup(symbol_name
);
1314 if (ref
->name
== NULL
) {
1319 bracket
= strchr(ref
->name
, ']');
1325 for (i
= 0; i
< MAP__NR_TYPES
; ++i
) {
1326 struct kmap
*kmap
= map__kmap(maps
[i
]);
1327 kmap
->ref_reloc_sym
= ref
;
1333 size_t perf_session__fprintf_dsos(struct perf_session
*self
, FILE *fp
)
1335 return machines__fprintf_dsos(&self
->machines
, fp
);
1338 size_t perf_session__fprintf_dsos_buildid(struct perf_session
*self
, FILE *fp
,
1339 bool (skip
)(struct dso
*dso
, int parm
), int parm
)
1341 return machines__fprintf_dsos_buildid(&self
->machines
, fp
, skip
, parm
);
1344 size_t perf_session__fprintf_nr_events(struct perf_session
*session
, FILE *fp
)
1346 struct perf_evsel
*pos
;
1347 size_t ret
= fprintf(fp
, "Aggregated stats:\n");
1349 ret
+= events_stats__fprintf(&session
->stats
, fp
);
1351 list_for_each_entry(pos
, &session
->evlist
->entries
, node
) {
1352 ret
+= fprintf(fp
, "%s stats:\n", perf_evsel__name(pos
));
1353 ret
+= events_stats__fprintf(&pos
->hists
.stats
, fp
);
1359 size_t perf_session__fprintf(struct perf_session
*session
, FILE *fp
)
1362 * FIXME: Here we have to actually print all the machines in this
1363 * session, not just the host...
1365 return machine__fprintf(&session
->machines
.host
, fp
);
1368 void perf_session__remove_thread(struct perf_session
*session
,
1372 * FIXME: This one makes no sense, we need to remove the thread from
1373 * the machine it belongs to, perf_session can have many machines, so
1374 * doing it always on ->machines.host is wrong. Fix when auditing all
1375 * the 'perf kvm' code.
1377 machine__remove_thread(&session
->machines
.host
, th
);
1380 struct perf_evsel
*perf_session__find_first_evtype(struct perf_session
*session
,
1383 struct perf_evsel
*pos
;
1385 list_for_each_entry(pos
, &session
->evlist
->entries
, node
) {
1386 if (pos
->attr
.type
== type
)
1392 void perf_evsel__print_ip(struct perf_evsel
*evsel
, union perf_event
*event
,
1393 struct perf_sample
*sample
, struct machine
*machine
,
1394 int print_sym
, int print_dso
, int print_symoffset
)
1396 struct addr_location al
;
1397 struct callchain_cursor_node
*node
;
1399 if (perf_event__preprocess_sample(event
, machine
, &al
, sample
,
1401 error("problem processing %d event, skipping it.\n",
1402 event
->header
.type
);
1406 if (symbol_conf
.use_callchain
&& sample
->callchain
) {
1409 if (machine__resolve_callchain(machine
, evsel
, al
.thread
,
1410 sample
, NULL
) != 0) {
1412 error("Failed to resolve callchain. Skipping\n");
1415 callchain_cursor_commit(&callchain_cursor
);
1418 node
= callchain_cursor_current(&callchain_cursor
);
1422 printf("\t%16" PRIx64
, node
->ip
);
1425 symbol__fprintf_symname(node
->sym
, stdout
);
1429 map__fprintf_dsoname(node
->map
, stdout
);
1434 callchain_cursor_advance(&callchain_cursor
);
1438 printf("%16" PRIx64
, sample
->ip
);
1441 if (print_symoffset
)
1442 symbol__fprintf_symname_offs(al
.sym
, &al
,
1445 symbol__fprintf_symname(al
.sym
, stdout
);
1450 map__fprintf_dsoname(al
.map
, stdout
);
1456 int perf_session__cpu_bitmap(struct perf_session
*session
,
1457 const char *cpu_list
, unsigned long *cpu_bitmap
)
1460 struct cpu_map
*map
;
1462 for (i
= 0; i
< PERF_TYPE_MAX
; ++i
) {
1463 struct perf_evsel
*evsel
;
1465 evsel
= perf_session__find_first_evtype(session
, i
);
1469 if (!(evsel
->attr
.sample_type
& PERF_SAMPLE_CPU
)) {
1470 pr_err("File does not contain CPU events. "
1471 "Remove -c option to proceed.\n");
1476 map
= cpu_map__new(cpu_list
);
1478 pr_err("Invalid cpu_list\n");
1482 for (i
= 0; i
< map
->nr
; i
++) {
1483 int cpu
= map
->map
[i
];
1485 if (cpu
>= MAX_NR_CPUS
) {
1486 pr_err("Requested CPU %d too large. "
1487 "Consider raising MAX_NR_CPUS\n", cpu
);
1491 set_bit(cpu
, cpu_bitmap
);
1497 void perf_session__fprintf_info(struct perf_session
*session
, FILE *fp
,
1503 if (session
== NULL
|| fp
== NULL
)
1506 ret
= fstat(session
->fd
, &st
);
1510 fprintf(fp
, "# ========\n");
1511 fprintf(fp
, "# captured on: %s", ctime(&st
.st_ctime
));
1512 perf_header__fprintf_info(session
, fp
, full
);
1513 fprintf(fp
, "# ========\n#\n");
1517 int __perf_session__set_tracepoints_handlers(struct perf_session
*session
,
1518 const struct perf_evsel_str_handler
*assocs
,
1521 struct perf_evlist
*evlist
= session
->evlist
;
1522 struct event_format
*format
;
1523 struct perf_evsel
*evsel
;
1524 char *tracepoint
, *name
;
1528 for (i
= 0; i
< nr_assocs
; i
++) {
1530 tracepoint
= strdup(assocs
[i
].name
);
1531 if (tracepoint
== NULL
)
1535 name
= strchr(tracepoint
, ':');
1540 format
= pevent_find_event_by_name(session
->pevent
,
1542 if (format
== NULL
) {
1544 * Adding a handler for an event not in the session,
1550 evsel
= perf_evlist__find_tracepoint_by_id(evlist
, format
->id
);
1555 if (evsel
->handler
.func
!= NULL
)
1557 evsel
->handler
.func
= assocs
[i
].handler
;