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 struct perf_session
*perf_session__new(struct perf_data_file
*file
,
71 bool repipe
, struct perf_tool
*tool
)
73 struct perf_session
*session
= zalloc(sizeof(*session
));
78 session
->repipe
= repipe
;
79 INIT_LIST_HEAD(&session
->ordered_samples
.samples
);
80 INIT_LIST_HEAD(&session
->ordered_samples
.sample_cache
);
81 INIT_LIST_HEAD(&session
->ordered_samples
.to_free
);
82 machines__init(&session
->machines
);
85 if (perf_data_file__open(file
))
90 if (perf_data_file__is_read(file
)) {
91 if (perf_session__open(session
) < 0)
94 perf_session__set_id_hdr_size(session
);
98 if (!file
|| perf_data_file__is_write(file
)) {
100 * In O_RDONLY mode this will be performed when reading the
101 * kernel MMAP event, in perf_event__process_mmap().
103 if (perf_session__create_kernel_maps(session
) < 0)
107 if (tool
&& tool
->ordering_requires_timestamps
&&
108 tool
->ordered_samples
&& !perf_evlist__sample_id_all(session
->evlist
)) {
109 dump_printf("WARNING: No sample_id_all support, falling back to unordered processing\n");
110 tool
->ordered_samples
= false;
116 perf_data_file__close(file
);
118 perf_session__delete(session
);
123 static void perf_session__delete_dead_threads(struct perf_session
*session
)
125 machine__delete_dead_threads(&session
->machines
.host
);
128 static void perf_session__delete_threads(struct perf_session
*session
)
130 machine__delete_threads(&session
->machines
.host
);
133 static void perf_session_env__delete(struct perf_session_env
*env
)
136 free(env
->os_release
);
143 free(env
->sibling_cores
);
144 free(env
->sibling_threads
);
145 free(env
->numa_nodes
);
146 free(env
->pmu_mappings
);
149 void perf_session__delete(struct perf_session
*session
)
151 perf_session__destroy_kernel_maps(session
);
152 perf_session__delete_dead_threads(session
);
153 perf_session__delete_threads(session
);
154 perf_session_env__delete(&session
->header
.env
);
155 machines__exit(&session
->machines
);
157 perf_data_file__close(session
->file
);
162 static int process_event_synth_tracing_data_stub(struct perf_tool
*tool
164 union perf_event
*event
166 struct perf_session
*session
169 dump_printf(": unhandled!\n");
173 static int process_event_synth_attr_stub(struct perf_tool
*tool __maybe_unused
,
174 union perf_event
*event __maybe_unused
,
175 struct perf_evlist
**pevlist
178 dump_printf(": unhandled!\n");
182 static int process_event_sample_stub(struct perf_tool
*tool __maybe_unused
,
183 union perf_event
*event __maybe_unused
,
184 struct perf_sample
*sample __maybe_unused
,
185 struct perf_evsel
*evsel __maybe_unused
,
186 struct machine
*machine __maybe_unused
)
188 dump_printf(": unhandled!\n");
192 static int process_event_stub(struct perf_tool
*tool __maybe_unused
,
193 union perf_event
*event __maybe_unused
,
194 struct perf_sample
*sample __maybe_unused
,
195 struct machine
*machine __maybe_unused
)
197 dump_printf(": unhandled!\n");
201 static int process_finished_round_stub(struct perf_tool
*tool __maybe_unused
,
202 union perf_event
*event __maybe_unused
,
203 struct perf_session
*perf_session
206 dump_printf(": unhandled!\n");
210 static int process_finished_round(struct perf_tool
*tool
,
211 union perf_event
*event
,
212 struct perf_session
*session
);
214 void perf_tool__fill_defaults(struct perf_tool
*tool
)
216 if (tool
->sample
== NULL
)
217 tool
->sample
= process_event_sample_stub
;
218 if (tool
->mmap
== NULL
)
219 tool
->mmap
= process_event_stub
;
220 if (tool
->mmap2
== NULL
)
221 tool
->mmap2
= process_event_stub
;
222 if (tool
->comm
== NULL
)
223 tool
->comm
= process_event_stub
;
224 if (tool
->fork
== NULL
)
225 tool
->fork
= process_event_stub
;
226 if (tool
->exit
== NULL
)
227 tool
->exit
= process_event_stub
;
228 if (tool
->lost
== NULL
)
229 tool
->lost
= perf_event__process_lost
;
230 if (tool
->read
== NULL
)
231 tool
->read
= process_event_sample_stub
;
232 if (tool
->throttle
== NULL
)
233 tool
->throttle
= process_event_stub
;
234 if (tool
->unthrottle
== NULL
)
235 tool
->unthrottle
= process_event_stub
;
236 if (tool
->attr
== NULL
)
237 tool
->attr
= process_event_synth_attr_stub
;
238 if (tool
->tracing_data
== NULL
)
239 tool
->tracing_data
= process_event_synth_tracing_data_stub
;
240 if (tool
->build_id
== NULL
)
241 tool
->build_id
= process_finished_round_stub
;
242 if (tool
->finished_round
== NULL
) {
243 if (tool
->ordered_samples
)
244 tool
->finished_round
= process_finished_round
;
246 tool
->finished_round
= process_finished_round_stub
;
250 void mem_bswap_32(void *src
, int byte_size
)
253 while (byte_size
> 0) {
255 byte_size
-= sizeof(u32
);
260 void mem_bswap_64(void *src
, int byte_size
)
264 while (byte_size
> 0) {
266 byte_size
-= sizeof(u64
);
271 static void swap_sample_id_all(union perf_event
*event
, void *data
)
273 void *end
= (void *) event
+ event
->header
.size
;
274 int size
= end
- data
;
276 BUG_ON(size
% sizeof(u64
));
277 mem_bswap_64(data
, size
);
280 static void perf_event__all64_swap(union perf_event
*event
,
281 bool sample_id_all __maybe_unused
)
283 struct perf_event_header
*hdr
= &event
->header
;
284 mem_bswap_64(hdr
+ 1, event
->header
.size
- sizeof(*hdr
));
287 static void perf_event__comm_swap(union perf_event
*event
, bool sample_id_all
)
289 event
->comm
.pid
= bswap_32(event
->comm
.pid
);
290 event
->comm
.tid
= bswap_32(event
->comm
.tid
);
293 void *data
= &event
->comm
.comm
;
295 data
+= PERF_ALIGN(strlen(data
) + 1, sizeof(u64
));
296 swap_sample_id_all(event
, data
);
300 static void perf_event__mmap_swap(union perf_event
*event
,
303 event
->mmap
.pid
= bswap_32(event
->mmap
.pid
);
304 event
->mmap
.tid
= bswap_32(event
->mmap
.tid
);
305 event
->mmap
.start
= bswap_64(event
->mmap
.start
);
306 event
->mmap
.len
= bswap_64(event
->mmap
.len
);
307 event
->mmap
.pgoff
= bswap_64(event
->mmap
.pgoff
);
310 void *data
= &event
->mmap
.filename
;
312 data
+= PERF_ALIGN(strlen(data
) + 1, sizeof(u64
));
313 swap_sample_id_all(event
, data
);
317 static void perf_event__mmap2_swap(union perf_event
*event
,
320 event
->mmap2
.pid
= bswap_32(event
->mmap2
.pid
);
321 event
->mmap2
.tid
= bswap_32(event
->mmap2
.tid
);
322 event
->mmap2
.start
= bswap_64(event
->mmap2
.start
);
323 event
->mmap2
.len
= bswap_64(event
->mmap2
.len
);
324 event
->mmap2
.pgoff
= bswap_64(event
->mmap2
.pgoff
);
325 event
->mmap2
.maj
= bswap_32(event
->mmap2
.maj
);
326 event
->mmap2
.min
= bswap_32(event
->mmap2
.min
);
327 event
->mmap2
.ino
= bswap_64(event
->mmap2
.ino
);
330 void *data
= &event
->mmap2
.filename
;
332 data
+= PERF_ALIGN(strlen(data
) + 1, sizeof(u64
));
333 swap_sample_id_all(event
, data
);
336 static void perf_event__task_swap(union perf_event
*event
, bool sample_id_all
)
338 event
->fork
.pid
= bswap_32(event
->fork
.pid
);
339 event
->fork
.tid
= bswap_32(event
->fork
.tid
);
340 event
->fork
.ppid
= bswap_32(event
->fork
.ppid
);
341 event
->fork
.ptid
= bswap_32(event
->fork
.ptid
);
342 event
->fork
.time
= bswap_64(event
->fork
.time
);
345 swap_sample_id_all(event
, &event
->fork
+ 1);
348 static void perf_event__read_swap(union perf_event
*event
, bool sample_id_all
)
350 event
->read
.pid
= bswap_32(event
->read
.pid
);
351 event
->read
.tid
= bswap_32(event
->read
.tid
);
352 event
->read
.value
= bswap_64(event
->read
.value
);
353 event
->read
.time_enabled
= bswap_64(event
->read
.time_enabled
);
354 event
->read
.time_running
= bswap_64(event
->read
.time_running
);
355 event
->read
.id
= bswap_64(event
->read
.id
);
358 swap_sample_id_all(event
, &event
->read
+ 1);
361 static void perf_event__throttle_swap(union perf_event
*event
,
364 event
->throttle
.time
= bswap_64(event
->throttle
.time
);
365 event
->throttle
.id
= bswap_64(event
->throttle
.id
);
366 event
->throttle
.stream_id
= bswap_64(event
->throttle
.stream_id
);
369 swap_sample_id_all(event
, &event
->throttle
+ 1);
372 static u8
revbyte(u8 b
)
374 int rev
= (b
>> 4) | ((b
& 0xf) << 4);
375 rev
= ((rev
& 0xcc) >> 2) | ((rev
& 0x33) << 2);
376 rev
= ((rev
& 0xaa) >> 1) | ((rev
& 0x55) << 1);
381 * XXX this is hack in attempt to carry flags bitfield
382 * throught endian village. ABI says:
384 * Bit-fields are allocated from right to left (least to most significant)
385 * on little-endian implementations and from left to right (most to least
386 * significant) on big-endian implementations.
388 * The above seems to be byte specific, so we need to reverse each
389 * byte of the bitfield. 'Internet' also says this might be implementation
390 * specific and we probably need proper fix and carry perf_event_attr
391 * bitfield flags in separate data file FEAT_ section. Thought this seems
394 static void swap_bitfield(u8
*p
, unsigned len
)
398 for (i
= 0; i
< len
; i
++) {
404 /* exported for swapping attributes in file header */
405 void perf_event__attr_swap(struct perf_event_attr
*attr
)
407 attr
->type
= bswap_32(attr
->type
);
408 attr
->size
= bswap_32(attr
->size
);
409 attr
->config
= bswap_64(attr
->config
);
410 attr
->sample_period
= bswap_64(attr
->sample_period
);
411 attr
->sample_type
= bswap_64(attr
->sample_type
);
412 attr
->read_format
= bswap_64(attr
->read_format
);
413 attr
->wakeup_events
= bswap_32(attr
->wakeup_events
);
414 attr
->bp_type
= bswap_32(attr
->bp_type
);
415 attr
->bp_addr
= bswap_64(attr
->bp_addr
);
416 attr
->bp_len
= bswap_64(attr
->bp_len
);
417 attr
->branch_sample_type
= bswap_64(attr
->branch_sample_type
);
418 attr
->sample_regs_user
= bswap_64(attr
->sample_regs_user
);
419 attr
->sample_stack_user
= bswap_32(attr
->sample_stack_user
);
421 swap_bitfield((u8
*) (&attr
->read_format
+ 1), sizeof(u64
));
424 static void perf_event__hdr_attr_swap(union perf_event
*event
,
425 bool sample_id_all __maybe_unused
)
429 perf_event__attr_swap(&event
->attr
.attr
);
431 size
= event
->header
.size
;
432 size
-= (void *)&event
->attr
.id
- (void *)event
;
433 mem_bswap_64(event
->attr
.id
, size
);
436 static void perf_event__event_type_swap(union perf_event
*event
,
437 bool sample_id_all __maybe_unused
)
439 event
->event_type
.event_type
.event_id
=
440 bswap_64(event
->event_type
.event_type
.event_id
);
443 static void perf_event__tracing_data_swap(union perf_event
*event
,
444 bool sample_id_all __maybe_unused
)
446 event
->tracing_data
.size
= bswap_32(event
->tracing_data
.size
);
449 typedef void (*perf_event__swap_op
)(union perf_event
*event
,
452 static perf_event__swap_op perf_event__swap_ops
[] = {
453 [PERF_RECORD_MMAP
] = perf_event__mmap_swap
,
454 [PERF_RECORD_MMAP2
] = perf_event__mmap2_swap
,
455 [PERF_RECORD_COMM
] = perf_event__comm_swap
,
456 [PERF_RECORD_FORK
] = perf_event__task_swap
,
457 [PERF_RECORD_EXIT
] = perf_event__task_swap
,
458 [PERF_RECORD_LOST
] = perf_event__all64_swap
,
459 [PERF_RECORD_READ
] = perf_event__read_swap
,
460 [PERF_RECORD_THROTTLE
] = perf_event__throttle_swap
,
461 [PERF_RECORD_UNTHROTTLE
] = perf_event__throttle_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_tool
*tool
,
496 static int flush_sample_queue(struct perf_session
*s
,
497 struct perf_tool
*tool
)
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 bool show_progress
= limit
== ULLONG_MAX
;
506 struct ui_progress prog
;
509 if (!tool
->ordered_samples
|| !limit
)
513 ui_progress__init(&prog
, os
->nr_samples
, "Processing time ordered events...");
515 list_for_each_entry_safe(iter
, tmp
, head
, list
) {
519 if (iter
->timestamp
> limit
)
522 ret
= perf_evlist__parse_sample(s
->evlist
, iter
->event
, &sample
);
524 pr_err("Can't parse sample, err = %d\n", ret
);
526 ret
= perf_session_deliver_event(s
, iter
->event
, &sample
, tool
,
532 os
->last_flush
= iter
->timestamp
;
533 list_del(&iter
->list
);
534 list_add(&iter
->list
, &os
->sample_cache
);
537 ui_progress__update(&prog
, 1);
540 if (list_empty(head
)) {
541 os
->last_sample
= NULL
;
542 } else if (last_ts
<= limit
) {
544 list_entry(head
->prev
, struct sample_queue
, list
);
553 * When perf record finishes a pass on every buffers, it records this pseudo
555 * We record the max timestamp t found in the pass n.
556 * Assuming these timestamps are monotonic across cpus, we know that if
557 * a buffer still has events with timestamps below t, they will be all
558 * available and then read in the pass n + 1.
559 * Hence when we start to read the pass n + 2, we can safely flush every
560 * events with timestamps below t.
562 * ============ PASS n =================
565 * cnt1 timestamps | cnt2 timestamps
568 * - | 4 <--- max recorded
570 * ============ PASS n + 1 ==============
573 * cnt1 timestamps | cnt2 timestamps
576 * 5 | 7 <---- max recorded
578 * Flush every events below timestamp 4
580 * ============ PASS n + 2 ==============
583 * cnt1 timestamps | cnt2 timestamps
588 * Flush every events below timestamp 7
591 static int process_finished_round(struct perf_tool
*tool
,
592 union perf_event
*event __maybe_unused
,
593 struct perf_session
*session
)
595 int ret
= flush_sample_queue(session
, tool
);
597 session
->ordered_samples
.next_flush
= session
->ordered_samples
.max_timestamp
;
602 /* The queue is ordered by time */
603 static void __queue_event(struct sample_queue
*new, struct perf_session
*s
)
605 struct ordered_samples
*os
= &s
->ordered_samples
;
606 struct sample_queue
*sample
= os
->last_sample
;
607 u64 timestamp
= new->timestamp
;
611 os
->last_sample
= new;
614 list_add(&new->list
, &os
->samples
);
615 os
->max_timestamp
= timestamp
;
620 * last_sample might point to some random place in the list as it's
621 * the last queued event. We expect that the new event is close to
624 if (sample
->timestamp
<= timestamp
) {
625 while (sample
->timestamp
<= timestamp
) {
626 p
= sample
->list
.next
;
627 if (p
== &os
->samples
) {
628 list_add_tail(&new->list
, &os
->samples
);
629 os
->max_timestamp
= timestamp
;
632 sample
= list_entry(p
, struct sample_queue
, list
);
634 list_add_tail(&new->list
, &sample
->list
);
636 while (sample
->timestamp
> timestamp
) {
637 p
= sample
->list
.prev
;
638 if (p
== &os
->samples
) {
639 list_add(&new->list
, &os
->samples
);
642 sample
= list_entry(p
, struct sample_queue
, list
);
644 list_add(&new->list
, &sample
->list
);
648 #define MAX_SAMPLE_BUFFER (64 * 1024 / sizeof(struct sample_queue))
650 int perf_session_queue_event(struct perf_session
*s
, union perf_event
*event
,
651 struct perf_sample
*sample
, u64 file_offset
)
653 struct ordered_samples
*os
= &s
->ordered_samples
;
654 struct list_head
*sc
= &os
->sample_cache
;
655 u64 timestamp
= sample
->time
;
656 struct sample_queue
*new;
658 if (!timestamp
|| timestamp
== ~0ULL)
661 if (timestamp
< s
->ordered_samples
.last_flush
) {
662 printf("Warning: Timestamp below last timeslice flush\n");
666 if (!list_empty(sc
)) {
667 new = list_entry(sc
->next
, struct sample_queue
, list
);
668 list_del(&new->list
);
669 } else if (os
->sample_buffer
) {
670 new = os
->sample_buffer
+ os
->sample_buffer_idx
;
671 if (++os
->sample_buffer_idx
== MAX_SAMPLE_BUFFER
)
672 os
->sample_buffer
= NULL
;
674 os
->sample_buffer
= malloc(MAX_SAMPLE_BUFFER
* sizeof(*new));
675 if (!os
->sample_buffer
)
677 list_add(&os
->sample_buffer
->list
, &os
->to_free
);
678 os
->sample_buffer_idx
= 2;
679 new = os
->sample_buffer
+ 1;
682 new->timestamp
= timestamp
;
683 new->file_offset
= file_offset
;
686 __queue_event(new, s
);
691 static void callchain__printf(struct perf_sample
*sample
)
695 printf("... chain: nr:%" PRIu64
"\n", sample
->callchain
->nr
);
697 for (i
= 0; i
< sample
->callchain
->nr
; i
++)
698 printf("..... %2d: %016" PRIx64
"\n",
699 i
, sample
->callchain
->ips
[i
]);
702 static void branch_stack__printf(struct perf_sample
*sample
)
706 printf("... branch stack: nr:%" PRIu64
"\n", sample
->branch_stack
->nr
);
708 for (i
= 0; i
< sample
->branch_stack
->nr
; i
++)
709 printf("..... %2"PRIu64
": %016" PRIx64
" -> %016" PRIx64
"\n",
710 i
, sample
->branch_stack
->entries
[i
].from
,
711 sample
->branch_stack
->entries
[i
].to
);
714 static void regs_dump__printf(u64 mask
, u64
*regs
)
718 for_each_set_bit(rid
, (unsigned long *) &mask
, sizeof(mask
) * 8) {
721 printf(".... %-5s 0x%" PRIx64
"\n",
722 perf_reg_name(rid
), val
);
726 static void regs_user__printf(struct perf_sample
*sample
, u64 mask
)
728 struct regs_dump
*user_regs
= &sample
->user_regs
;
730 if (user_regs
->regs
) {
731 printf("... user regs: mask 0x%" PRIx64
"\n", mask
);
732 regs_dump__printf(mask
, user_regs
->regs
);
736 static void stack_user__printf(struct stack_dump
*dump
)
738 printf("... ustack: size %" PRIu64
", offset 0x%x\n",
739 dump
->size
, dump
->offset
);
742 static void perf_session__print_tstamp(struct perf_session
*session
,
743 union perf_event
*event
,
744 struct perf_sample
*sample
)
746 u64 sample_type
= __perf_evlist__combined_sample_type(session
->evlist
);
748 if (event
->header
.type
!= PERF_RECORD_SAMPLE
&&
749 !perf_evlist__sample_id_all(session
->evlist
)) {
750 fputs("-1 -1 ", stdout
);
754 if ((sample_type
& PERF_SAMPLE_CPU
))
755 printf("%u ", sample
->cpu
);
757 if (sample_type
& PERF_SAMPLE_TIME
)
758 printf("%" PRIu64
" ", sample
->time
);
761 static void sample_read__printf(struct perf_sample
*sample
, u64 read_format
)
763 printf("... sample_read:\n");
765 if (read_format
& PERF_FORMAT_TOTAL_TIME_ENABLED
)
766 printf("...... time enabled %016" PRIx64
"\n",
767 sample
->read
.time_enabled
);
769 if (read_format
& PERF_FORMAT_TOTAL_TIME_RUNNING
)
770 printf("...... time running %016" PRIx64
"\n",
771 sample
->read
.time_running
);
773 if (read_format
& PERF_FORMAT_GROUP
) {
776 printf(".... group nr %" PRIu64
"\n", sample
->read
.group
.nr
);
778 for (i
= 0; i
< sample
->read
.group
.nr
; i
++) {
779 struct sample_read_value
*value
;
781 value
= &sample
->read
.group
.values
[i
];
782 printf("..... id %016" PRIx64
783 ", value %016" PRIx64
"\n",
784 value
->id
, value
->value
);
787 printf("..... id %016" PRIx64
", value %016" PRIx64
"\n",
788 sample
->read
.one
.id
, sample
->read
.one
.value
);
791 static void dump_event(struct perf_session
*session
, union perf_event
*event
,
792 u64 file_offset
, struct perf_sample
*sample
)
797 printf("\n%#" PRIx64
" [%#x]: event: %d\n",
798 file_offset
, event
->header
.size
, event
->header
.type
);
803 perf_session__print_tstamp(session
, event
, sample
);
805 printf("%#" PRIx64
" [%#x]: PERF_RECORD_%s", file_offset
,
806 event
->header
.size
, perf_event__name(event
->header
.type
));
809 static void dump_sample(struct perf_evsel
*evsel
, union perf_event
*event
,
810 struct perf_sample
*sample
)
817 printf("(IP, %d): %d/%d: %#" PRIx64
" period: %" PRIu64
" addr: %#" PRIx64
"\n",
818 event
->header
.misc
, sample
->pid
, sample
->tid
, sample
->ip
,
819 sample
->period
, sample
->addr
);
821 sample_type
= evsel
->attr
.sample_type
;
823 if (sample_type
& PERF_SAMPLE_CALLCHAIN
)
824 callchain__printf(sample
);
826 if (sample_type
& PERF_SAMPLE_BRANCH_STACK
)
827 branch_stack__printf(sample
);
829 if (sample_type
& PERF_SAMPLE_REGS_USER
)
830 regs_user__printf(sample
, evsel
->attr
.sample_regs_user
);
832 if (sample_type
& PERF_SAMPLE_STACK_USER
)
833 stack_user__printf(&sample
->user_stack
);
835 if (sample_type
& PERF_SAMPLE_WEIGHT
)
836 printf("... weight: %" PRIu64
"\n", sample
->weight
);
838 if (sample_type
& PERF_SAMPLE_DATA_SRC
)
839 printf(" . data_src: 0x%"PRIx64
"\n", sample
->data_src
);
841 if (sample_type
& PERF_SAMPLE_TRANSACTION
)
842 printf("... transaction: %" PRIx64
"\n", sample
->transaction
);
844 if (sample_type
& PERF_SAMPLE_READ
)
845 sample_read__printf(sample
, evsel
->attr
.read_format
);
848 static struct machine
*
849 perf_session__find_machine_for_cpumode(struct perf_session
*session
,
850 union perf_event
*event
,
851 struct perf_sample
*sample
)
853 const u8 cpumode
= event
->header
.misc
& PERF_RECORD_MISC_CPUMODE_MASK
;
856 ((cpumode
== PERF_RECORD_MISC_GUEST_KERNEL
) ||
857 (cpumode
== PERF_RECORD_MISC_GUEST_USER
))) {
860 if (event
->header
.type
== PERF_RECORD_MMAP
861 || event
->header
.type
== PERF_RECORD_MMAP2
)
862 pid
= event
->mmap
.pid
;
866 return perf_session__findnew_machine(session
, pid
);
869 return &session
->machines
.host
;
872 static int deliver_sample_value(struct perf_session
*session
,
873 struct perf_tool
*tool
,
874 union perf_event
*event
,
875 struct perf_sample
*sample
,
876 struct sample_read_value
*v
,
877 struct machine
*machine
)
879 struct perf_sample_id
*sid
;
881 sid
= perf_evlist__id2sid(session
->evlist
, v
->id
);
884 sample
->period
= v
->value
- sid
->period
;
885 sid
->period
= v
->value
;
888 if (!sid
|| sid
->evsel
== NULL
) {
889 ++session
->stats
.nr_unknown_id
;
893 return tool
->sample(tool
, event
, sample
, sid
->evsel
, machine
);
896 static int deliver_sample_group(struct perf_session
*session
,
897 struct perf_tool
*tool
,
898 union perf_event
*event
,
899 struct perf_sample
*sample
,
900 struct machine
*machine
)
905 for (i
= 0; i
< sample
->read
.group
.nr
; i
++) {
906 ret
= deliver_sample_value(session
, tool
, event
, sample
,
907 &sample
->read
.group
.values
[i
],
917 perf_session__deliver_sample(struct perf_session
*session
,
918 struct perf_tool
*tool
,
919 union perf_event
*event
,
920 struct perf_sample
*sample
,
921 struct perf_evsel
*evsel
,
922 struct machine
*machine
)
924 /* We know evsel != NULL. */
925 u64 sample_type
= evsel
->attr
.sample_type
;
926 u64 read_format
= evsel
->attr
.read_format
;
928 /* Standard sample delievery. */
929 if (!(sample_type
& PERF_SAMPLE_READ
))
930 return tool
->sample(tool
, event
, sample
, evsel
, machine
);
932 /* For PERF_SAMPLE_READ we have either single or group mode. */
933 if (read_format
& PERF_FORMAT_GROUP
)
934 return deliver_sample_group(session
, tool
, event
, sample
,
937 return deliver_sample_value(session
, tool
, event
, sample
,
938 &sample
->read
.one
, machine
);
941 static int perf_session_deliver_event(struct perf_session
*session
,
942 union perf_event
*event
,
943 struct perf_sample
*sample
,
944 struct perf_tool
*tool
,
947 struct perf_evsel
*evsel
;
948 struct machine
*machine
;
950 dump_event(session
, event
, file_offset
, sample
);
952 evsel
= perf_evlist__id2evsel(session
->evlist
, sample
->id
);
953 if (evsel
!= NULL
&& event
->header
.type
!= PERF_RECORD_SAMPLE
) {
955 * XXX We're leaving PERF_RECORD_SAMPLE unnacounted here
956 * because the tools right now may apply filters, discarding
957 * some of the samples. For consistency, in the future we
958 * should have something like nr_filtered_samples and remove
959 * the sample->period from total_sample_period, etc, KISS for
962 * Also testing against NULL allows us to handle files without
963 * attr.sample_id_all and/or without PERF_SAMPLE_ID. In the
964 * future probably it'll be a good idea to restrict event
965 * processing via perf_session to files with both set.
967 hists__inc_nr_events(&evsel
->hists
, event
->header
.type
);
970 machine
= perf_session__find_machine_for_cpumode(session
, event
,
973 switch (event
->header
.type
) {
974 case PERF_RECORD_SAMPLE
:
975 dump_sample(evsel
, event
, sample
);
977 ++session
->stats
.nr_unknown_id
;
980 if (machine
== NULL
) {
981 ++session
->stats
.nr_unprocessable_samples
;
984 return perf_session__deliver_sample(session
, tool
, event
,
985 sample
, evsel
, machine
);
986 case PERF_RECORD_MMAP
:
987 return tool
->mmap(tool
, event
, sample
, machine
);
988 case PERF_RECORD_MMAP2
:
989 return tool
->mmap2(tool
, event
, sample
, machine
);
990 case PERF_RECORD_COMM
:
991 return tool
->comm(tool
, event
, sample
, machine
);
992 case PERF_RECORD_FORK
:
993 return tool
->fork(tool
, event
, sample
, machine
);
994 case PERF_RECORD_EXIT
:
995 return tool
->exit(tool
, event
, sample
, machine
);
996 case PERF_RECORD_LOST
:
997 if (tool
->lost
== perf_event__process_lost
)
998 session
->stats
.total_lost
+= event
->lost
.lost
;
999 return tool
->lost(tool
, event
, sample
, machine
);
1000 case PERF_RECORD_READ
:
1001 return tool
->read(tool
, event
, sample
, evsel
, machine
);
1002 case PERF_RECORD_THROTTLE
:
1003 return tool
->throttle(tool
, event
, sample
, machine
);
1004 case PERF_RECORD_UNTHROTTLE
:
1005 return tool
->unthrottle(tool
, event
, sample
, machine
);
1007 ++session
->stats
.nr_unknown_events
;
1012 static int perf_session__process_user_event(struct perf_session
*session
, union perf_event
*event
,
1013 struct perf_tool
*tool
, u64 file_offset
)
1015 int fd
= perf_data_file__fd(session
->file
);
1018 dump_event(session
, event
, file_offset
, NULL
);
1020 /* These events are processed right away */
1021 switch (event
->header
.type
) {
1022 case PERF_RECORD_HEADER_ATTR
:
1023 err
= tool
->attr(tool
, event
, &session
->evlist
);
1025 perf_session__set_id_hdr_size(session
);
1027 case PERF_RECORD_HEADER_TRACING_DATA
:
1028 /* setup for reading amidst mmap */
1029 lseek(fd
, file_offset
, SEEK_SET
);
1030 return tool
->tracing_data(tool
, event
, session
);
1031 case PERF_RECORD_HEADER_BUILD_ID
:
1032 return tool
->build_id(tool
, event
, session
);
1033 case PERF_RECORD_FINISHED_ROUND
:
1034 return tool
->finished_round(tool
, event
, session
);
1040 static void event_swap(union perf_event
*event
, bool sample_id_all
)
1042 perf_event__swap_op swap
;
1044 swap
= perf_event__swap_ops
[event
->header
.type
];
1046 swap(event
, sample_id_all
);
1049 static int perf_session__process_event(struct perf_session
*session
,
1050 union perf_event
*event
,
1051 struct perf_tool
*tool
,
1054 struct perf_sample sample
;
1057 if (session
->header
.needs_swap
)
1058 event_swap(event
, perf_evlist__sample_id_all(session
->evlist
));
1060 if (event
->header
.type
>= PERF_RECORD_HEADER_MAX
)
1063 events_stats__inc(&session
->stats
, event
->header
.type
);
1065 if (event
->header
.type
>= PERF_RECORD_USER_TYPE_START
)
1066 return perf_session__process_user_event(session
, event
, tool
, file_offset
);
1069 * For all kernel events we get the sample data
1071 ret
= perf_evlist__parse_sample(session
->evlist
, event
, &sample
);
1075 if (tool
->ordered_samples
) {
1076 ret
= perf_session_queue_event(session
, event
, &sample
,
1082 return perf_session_deliver_event(session
, event
, &sample
, tool
,
1086 void perf_event_header__bswap(struct perf_event_header
*hdr
)
1088 hdr
->type
= bswap_32(hdr
->type
);
1089 hdr
->misc
= bswap_16(hdr
->misc
);
1090 hdr
->size
= bswap_16(hdr
->size
);
1093 struct thread
*perf_session__findnew(struct perf_session
*session
, pid_t pid
)
1095 return machine__findnew_thread(&session
->machines
.host
, 0, pid
);
1098 static struct thread
*perf_session__register_idle_thread(struct perf_session
*session
)
1100 struct thread
*thread
= perf_session__findnew(session
, 0);
1102 if (thread
== NULL
|| thread__set_comm(thread
, "swapper", 0)) {
1103 pr_err("problem inserting idle task.\n");
1110 static void perf_session__warn_about_errors(const struct perf_session
*session
,
1111 const struct perf_tool
*tool
)
1113 if (tool
->lost
== perf_event__process_lost
&&
1114 session
->stats
.nr_events
[PERF_RECORD_LOST
] != 0) {
1115 ui__warning("Processed %d events and lost %d chunks!\n\n"
1116 "Check IO/CPU overload!\n\n",
1117 session
->stats
.nr_events
[0],
1118 session
->stats
.nr_events
[PERF_RECORD_LOST
]);
1121 if (session
->stats
.nr_unknown_events
!= 0) {
1122 ui__warning("Found %u unknown events!\n\n"
1123 "Is this an older tool processing a perf.data "
1124 "file generated by a more recent tool?\n\n"
1125 "If that is not the case, consider "
1126 "reporting to linux-kernel@vger.kernel.org.\n\n",
1127 session
->stats
.nr_unknown_events
);
1130 if (session
->stats
.nr_unknown_id
!= 0) {
1131 ui__warning("%u samples with id not present in the header\n",
1132 session
->stats
.nr_unknown_id
);
1135 if (session
->stats
.nr_invalid_chains
!= 0) {
1136 ui__warning("Found invalid callchains!\n\n"
1137 "%u out of %u events were discarded for this reason.\n\n"
1138 "Consider reporting to linux-kernel@vger.kernel.org.\n\n",
1139 session
->stats
.nr_invalid_chains
,
1140 session
->stats
.nr_events
[PERF_RECORD_SAMPLE
]);
1143 if (session
->stats
.nr_unprocessable_samples
!= 0) {
1144 ui__warning("%u unprocessable samples recorded.\n"
1145 "Do you have a KVM guest running and not using 'perf kvm'?\n",
1146 session
->stats
.nr_unprocessable_samples
);
1150 volatile int session_done
;
1152 static int __perf_session__process_pipe_events(struct perf_session
*session
,
1153 struct perf_tool
*tool
)
1155 int fd
= perf_data_file__fd(session
->file
);
1156 union perf_event
*event
;
1157 uint32_t size
, cur_size
= 0;
1164 perf_tool__fill_defaults(tool
);
1167 cur_size
= sizeof(union perf_event
);
1169 buf
= malloc(cur_size
);
1174 err
= readn(fd
, event
, sizeof(struct perf_event_header
));
1179 pr_err("failed to read event header\n");
1183 if (session
->header
.needs_swap
)
1184 perf_event_header__bswap(&event
->header
);
1186 size
= event
->header
.size
;
1187 if (size
< sizeof(struct perf_event_header
)) {
1188 pr_err("bad event header size\n");
1192 if (size
> cur_size
) {
1193 void *new = realloc(buf
, size
);
1195 pr_err("failed to allocate memory to read event\n");
1203 p
+= sizeof(struct perf_event_header
);
1205 if (size
- sizeof(struct perf_event_header
)) {
1206 err
= readn(fd
, p
, size
- sizeof(struct perf_event_header
));
1209 pr_err("unexpected end of event stream\n");
1213 pr_err("failed to read event data\n");
1218 if ((skip
= perf_session__process_event(session
, event
, tool
, head
)) < 0) {
1219 pr_err("%#" PRIx64
" [%#x]: failed to process type: %d\n",
1220 head
, event
->header
.size
, event
->header
.type
);
1230 if (!session_done())
1233 /* do the final flush for ordered samples */
1234 session
->ordered_samples
.next_flush
= ULLONG_MAX
;
1235 err
= flush_sample_queue(session
, tool
);
1238 perf_session__warn_about_errors(session
, tool
);
1239 perf_session_free_sample_buffers(session
);
1243 static union perf_event
*
1244 fetch_mmaped_event(struct perf_session
*session
,
1245 u64 head
, size_t mmap_size
, char *buf
)
1247 union perf_event
*event
;
1250 * Ensure we have enough space remaining to read
1251 * the size of the event in the headers.
1253 if (head
+ sizeof(event
->header
) > mmap_size
)
1256 event
= (union perf_event
*)(buf
+ head
);
1258 if (session
->header
.needs_swap
)
1259 perf_event_header__bswap(&event
->header
);
1261 if (head
+ event
->header
.size
> mmap_size
) {
1262 /* We're not fetching the event so swap back again */
1263 if (session
->header
.needs_swap
)
1264 perf_event_header__bswap(&event
->header
);
1272 * On 64bit we can mmap the data file in one go. No need for tiny mmap
1273 * slices. On 32bit we use 32MB.
1275 #if BITS_PER_LONG == 64
1276 #define MMAP_SIZE ULLONG_MAX
1279 #define MMAP_SIZE (32 * 1024 * 1024ULL)
1280 #define NUM_MMAPS 128
1283 int __perf_session__process_events(struct perf_session
*session
,
1284 u64 data_offset
, u64 data_size
,
1285 u64 file_size
, struct perf_tool
*tool
)
1287 int fd
= perf_data_file__fd(session
->file
);
1288 u64 head
, page_offset
, file_offset
, file_pos
;
1289 int err
, mmap_prot
, mmap_flags
, map_idx
= 0;
1291 char *buf
, *mmaps
[NUM_MMAPS
];
1292 union perf_event
*event
;
1294 struct ui_progress prog
;
1296 perf_tool__fill_defaults(tool
);
1298 page_offset
= page_size
* (data_offset
/ page_size
);
1299 file_offset
= page_offset
;
1300 head
= data_offset
- page_offset
;
1302 if (data_size
&& (data_offset
+ data_size
< file_size
))
1303 file_size
= data_offset
+ data_size
;
1305 ui_progress__init(&prog
, file_size
, "Processing events...");
1307 mmap_size
= MMAP_SIZE
;
1308 if (mmap_size
> file_size
)
1309 mmap_size
= file_size
;
1311 memset(mmaps
, 0, sizeof(mmaps
));
1313 mmap_prot
= PROT_READ
;
1314 mmap_flags
= MAP_SHARED
;
1316 if (session
->header
.needs_swap
) {
1317 mmap_prot
|= PROT_WRITE
;
1318 mmap_flags
= MAP_PRIVATE
;
1321 buf
= mmap(NULL
, mmap_size
, mmap_prot
, mmap_flags
, fd
,
1323 if (buf
== MAP_FAILED
) {
1324 pr_err("failed to mmap file\n");
1328 mmaps
[map_idx
] = buf
;
1329 map_idx
= (map_idx
+ 1) & (ARRAY_SIZE(mmaps
) - 1);
1330 file_pos
= file_offset
+ head
;
1333 event
= fetch_mmaped_event(session
, head
, mmap_size
, buf
);
1335 if (mmaps
[map_idx
]) {
1336 munmap(mmaps
[map_idx
], mmap_size
);
1337 mmaps
[map_idx
] = NULL
;
1340 page_offset
= page_size
* (head
/ page_size
);
1341 file_offset
+= page_offset
;
1342 head
-= page_offset
;
1346 size
= event
->header
.size
;
1348 if (size
< sizeof(struct perf_event_header
) ||
1349 perf_session__process_event(session
, event
, tool
, file_pos
) < 0) {
1350 pr_err("%#" PRIx64
" [%#x]: failed to process type: %d\n",
1351 file_offset
+ head
, event
->header
.size
,
1352 event
->header
.type
);
1360 ui_progress__update(&prog
, size
);
1365 if (file_pos
< file_size
)
1369 /* do the final flush for ordered samples */
1370 session
->ordered_samples
.next_flush
= ULLONG_MAX
;
1371 err
= flush_sample_queue(session
, tool
);
1373 ui_progress__finish();
1374 perf_session__warn_about_errors(session
, tool
);
1375 perf_session_free_sample_buffers(session
);
1379 int perf_session__process_events(struct perf_session
*session
,
1380 struct perf_tool
*tool
)
1382 u64 size
= perf_data_file__size(session
->file
);
1385 if (perf_session__register_idle_thread(session
) == NULL
)
1388 if (!perf_data_file__is_pipe(session
->file
))
1389 err
= __perf_session__process_events(session
,
1390 session
->header
.data_offset
,
1391 session
->header
.data_size
,
1394 err
= __perf_session__process_pipe_events(session
, tool
);
1399 bool perf_session__has_traces(struct perf_session
*session
, const char *msg
)
1401 struct perf_evsel
*evsel
;
1403 list_for_each_entry(evsel
, &session
->evlist
->entries
, node
) {
1404 if (evsel
->attr
.type
== PERF_TYPE_TRACEPOINT
)
1408 pr_err("No trace sample to read. Did you call 'perf %s'?\n", msg
);
1412 int maps__set_kallsyms_ref_reloc_sym(struct map
**maps
,
1413 const char *symbol_name
, u64 addr
)
1417 struct ref_reloc_sym
*ref
;
1419 ref
= zalloc(sizeof(struct ref_reloc_sym
));
1423 ref
->name
= strdup(symbol_name
);
1424 if (ref
->name
== NULL
) {
1429 bracket
= strchr(ref
->name
, ']');
1435 for (i
= 0; i
< MAP__NR_TYPES
; ++i
) {
1436 struct kmap
*kmap
= map__kmap(maps
[i
]);
1437 kmap
->ref_reloc_sym
= ref
;
1443 size_t perf_session__fprintf_dsos(struct perf_session
*session
, FILE *fp
)
1445 return machines__fprintf_dsos(&session
->machines
, fp
);
1448 size_t perf_session__fprintf_dsos_buildid(struct perf_session
*session
, FILE *fp
,
1449 bool (skip
)(struct dso
*dso
, int parm
), int parm
)
1451 return machines__fprintf_dsos_buildid(&session
->machines
, fp
, skip
, parm
);
1454 size_t perf_session__fprintf_nr_events(struct perf_session
*session
, FILE *fp
)
1456 struct perf_evsel
*pos
;
1457 size_t ret
= fprintf(fp
, "Aggregated stats:\n");
1459 ret
+= events_stats__fprintf(&session
->stats
, fp
);
1461 list_for_each_entry(pos
, &session
->evlist
->entries
, node
) {
1462 ret
+= fprintf(fp
, "%s stats:\n", perf_evsel__name(pos
));
1463 ret
+= events_stats__fprintf(&pos
->hists
.stats
, fp
);
1469 size_t perf_session__fprintf(struct perf_session
*session
, FILE *fp
)
1472 * FIXME: Here we have to actually print all the machines in this
1473 * session, not just the host...
1475 return machine__fprintf(&session
->machines
.host
, fp
);
1478 struct perf_evsel
*perf_session__find_first_evtype(struct perf_session
*session
,
1481 struct perf_evsel
*pos
;
1483 list_for_each_entry(pos
, &session
->evlist
->entries
, node
) {
1484 if (pos
->attr
.type
== type
)
1490 void perf_evsel__print_ip(struct perf_evsel
*evsel
, union perf_event
*event
,
1491 struct perf_sample
*sample
, struct machine
*machine
,
1492 unsigned int print_opts
, unsigned int stack_depth
)
1494 struct addr_location al
;
1495 struct callchain_cursor_node
*node
;
1496 int print_ip
= print_opts
& PRINT_IP_OPT_IP
;
1497 int print_sym
= print_opts
& PRINT_IP_OPT_SYM
;
1498 int print_dso
= print_opts
& PRINT_IP_OPT_DSO
;
1499 int print_symoffset
= print_opts
& PRINT_IP_OPT_SYMOFFSET
;
1500 int print_oneline
= print_opts
& PRINT_IP_OPT_ONELINE
;
1501 char s
= print_oneline
? ' ' : '\t';
1503 if (perf_event__preprocess_sample(event
, machine
, &al
, sample
) < 0) {
1504 error("problem processing %d event, skipping it.\n",
1505 event
->header
.type
);
1509 if (symbol_conf
.use_callchain
&& sample
->callchain
) {
1511 if (machine__resolve_callchain(machine
, evsel
, al
.thread
,
1513 PERF_MAX_STACK_DEPTH
) != 0) {
1515 error("Failed to resolve callchain. Skipping\n");
1518 callchain_cursor_commit(&callchain_cursor
);
1520 while (stack_depth
) {
1521 node
= callchain_cursor_current(&callchain_cursor
);
1526 printf("%c%16" PRIx64
, s
, node
->ip
);
1530 if (print_symoffset
) {
1533 symbol__fprintf_symname_offs(node
->sym
, &al
, stdout
);
1535 symbol__fprintf_symname(node
->sym
, stdout
);
1540 map__fprintf_dsoname(node
->map
, stdout
);
1547 callchain_cursor_advance(&callchain_cursor
);
1554 printf("%16" PRIx64
, sample
->ip
);
1558 if (print_symoffset
)
1559 symbol__fprintf_symname_offs(al
.sym
, &al
,
1562 symbol__fprintf_symname(al
.sym
, stdout
);
1567 map__fprintf_dsoname(al
.map
, stdout
);
1573 int perf_session__cpu_bitmap(struct perf_session
*session
,
1574 const char *cpu_list
, unsigned long *cpu_bitmap
)
1577 struct cpu_map
*map
;
1579 for (i
= 0; i
< PERF_TYPE_MAX
; ++i
) {
1580 struct perf_evsel
*evsel
;
1582 evsel
= perf_session__find_first_evtype(session
, i
);
1586 if (!(evsel
->attr
.sample_type
& PERF_SAMPLE_CPU
)) {
1587 pr_err("File does not contain CPU events. "
1588 "Remove -c option to proceed.\n");
1593 map
= cpu_map__new(cpu_list
);
1595 pr_err("Invalid cpu_list\n");
1599 for (i
= 0; i
< map
->nr
; i
++) {
1600 int cpu
= map
->map
[i
];
1602 if (cpu
>= MAX_NR_CPUS
) {
1603 pr_err("Requested CPU %d too large. "
1604 "Consider raising MAX_NR_CPUS\n", cpu
);
1608 set_bit(cpu
, cpu_bitmap
);
1614 void perf_session__fprintf_info(struct perf_session
*session
, FILE *fp
,
1617 int fd
= perf_data_file__fd(session
->file
);
1621 if (session
== NULL
|| fp
== NULL
)
1624 ret
= fstat(fd
, &st
);
1628 fprintf(fp
, "# ========\n");
1629 fprintf(fp
, "# captured on: %s", ctime(&st
.st_ctime
));
1630 perf_header__fprintf_info(session
, fp
, full
);
1631 fprintf(fp
, "# ========\n#\n");
1635 int __perf_session__set_tracepoints_handlers(struct perf_session
*session
,
1636 const struct perf_evsel_str_handler
*assocs
,
1639 struct perf_evsel
*evsel
;
1643 for (i
= 0; i
< nr_assocs
; i
++) {
1645 * Adding a handler for an event not in the session,
1648 evsel
= perf_evlist__find_tracepoint_by_name(session
->evlist
, assocs
[i
].name
);
1653 if (evsel
->handler
!= NULL
)
1655 evsel
->handler
= assocs
[i
].handler
;