1 #define _FILE_OFFSET_BITS 64
3 #include <linux/kernel.h>
17 #include "event-parse.h"
19 static int perf_session__open(struct perf_session
*self
, bool force
)
21 struct stat input_stat
;
23 if (!strcmp(self
->filename
, "-")) {
25 self
->fd
= STDIN_FILENO
;
27 if (perf_session__read_header(self
, self
->fd
) < 0)
28 pr_err("incompatible file format (rerun with -v to learn more)");
33 self
->fd
= open(self
->filename
, O_RDONLY
);
37 pr_err("failed to open %s: %s", self
->filename
, strerror(err
));
38 if (err
== ENOENT
&& !strcmp(self
->filename
, "perf.data"))
39 pr_err(" (try 'perf record' first)");
44 if (fstat(self
->fd
, &input_stat
) < 0)
47 if (!force
&& input_stat
.st_uid
&& (input_stat
.st_uid
!= geteuid())) {
48 pr_err("file %s not owned by current user or root\n",
53 if (!input_stat
.st_size
) {
54 pr_info("zero-sized file (%s), nothing to do!\n",
59 if (perf_session__read_header(self
, self
->fd
) < 0) {
60 pr_err("incompatible file format (rerun with -v to learn more)");
64 if (!perf_evlist__valid_sample_type(self
->evlist
)) {
65 pr_err("non matching sample_type");
69 if (!perf_evlist__valid_sample_id_all(self
->evlist
)) {
70 pr_err("non matching sample_id_all");
74 self
->size
= input_stat
.st_size
;
83 void perf_session__set_id_hdr_size(struct perf_session
*session
)
85 u16 id_hdr_size
= perf_evlist__id_hdr_size(session
->evlist
);
87 session
->host_machine
.id_hdr_size
= id_hdr_size
;
88 machines__set_id_hdr_size(&session
->machines
, id_hdr_size
);
91 int perf_session__create_kernel_maps(struct perf_session
*self
)
93 int ret
= machine__create_kernel_maps(&self
->host_machine
);
96 ret
= machines__create_guest_kernel_maps(&self
->machines
);
100 static void perf_session__destroy_kernel_maps(struct perf_session
*self
)
102 machine__destroy_kernel_maps(&self
->host_machine
);
103 machines__destroy_guest_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
);
129 * On 64bit we can mmap the data file in one go. No need for tiny mmap
130 * slices. On 32bit we use 32MB.
132 #if BITS_PER_LONG == 64
133 self
->mmap_window
= ULLONG_MAX
;
135 self
->mmap_window
= 32 * 1024 * 1024ULL;
137 self
->machines
= RB_ROOT
;
138 self
->repipe
= repipe
;
139 INIT_LIST_HEAD(&self
->ordered_samples
.samples
);
140 INIT_LIST_HEAD(&self
->ordered_samples
.sample_cache
);
141 INIT_LIST_HEAD(&self
->ordered_samples
.to_free
);
142 machine__init(&self
->host_machine
, "", HOST_KERNEL_ID
);
143 hists__init(&self
->hists
);
145 if (mode
== O_RDONLY
) {
146 if (perf_session__open(self
, force
) < 0)
148 perf_session__set_id_hdr_size(self
);
149 } else if (mode
== O_WRONLY
) {
151 * In O_RDONLY mode this will be performed when reading the
152 * kernel MMAP event, in perf_event__process_mmap().
154 if (perf_session__create_kernel_maps(self
) < 0)
158 if (tool
&& tool
->ordering_requires_timestamps
&&
159 tool
->ordered_samples
&& !perf_evlist__sample_id_all(self
->evlist
)) {
160 dump_printf("WARNING: No sample_id_all support, falling back to unordered processing\n");
161 tool
->ordered_samples
= false;
167 perf_session__delete(self
);
171 static void machine__delete_dead_threads(struct machine
*machine
)
173 struct thread
*n
, *t
;
175 list_for_each_entry_safe(t
, n
, &machine
->dead_threads
, node
) {
181 static void perf_session__delete_dead_threads(struct perf_session
*session
)
183 machine__delete_dead_threads(&session
->host_machine
);
186 static void machine__delete_threads(struct machine
*self
)
188 struct rb_node
*nd
= rb_first(&self
->threads
);
191 struct thread
*t
= rb_entry(nd
, struct thread
, rb_node
);
193 rb_erase(&t
->rb_node
, &self
->threads
);
199 static void perf_session__delete_threads(struct perf_session
*session
)
201 machine__delete_threads(&session
->host_machine
);
204 void perf_session__delete(struct perf_session
*self
)
206 perf_session__destroy_kernel_maps(self
);
207 perf_session__delete_dead_threads(self
);
208 perf_session__delete_threads(self
);
209 machine__exit(&self
->host_machine
);
214 void machine__remove_thread(struct machine
*self
, struct thread
*th
)
216 self
->last_match
= NULL
;
217 rb_erase(&th
->rb_node
, &self
->threads
);
219 * We may have references to this thread, for instance in some hist_entry
220 * instances, so just move them to a separate list.
222 list_add_tail(&th
->node
, &self
->dead_threads
);
225 static bool symbol__match_parent_regex(struct symbol
*sym
)
227 if (sym
->name
&& !regexec(&parent_regex
, sym
->name
, 0, NULL
, 0))
233 static const u8 cpumodes
[] = {
234 PERF_RECORD_MISC_USER
,
235 PERF_RECORD_MISC_KERNEL
,
236 PERF_RECORD_MISC_GUEST_USER
,
237 PERF_RECORD_MISC_GUEST_KERNEL
239 #define NCPUMODES (sizeof(cpumodes)/sizeof(u8))
241 static void ip__resolve_ams(struct machine
*self
, struct thread
*thread
,
242 struct addr_map_symbol
*ams
,
245 struct addr_location al
;
249 memset(&al
, 0, sizeof(al
));
251 for (i
= 0; i
< NCPUMODES
; i
++) {
254 * We cannot use the header.misc hint to determine whether a
255 * branch stack address is user, kernel, guest, hypervisor.
256 * Branches may straddle the kernel/user/hypervisor boundaries.
257 * Thus, we have to try consecutively until we find a match
258 * or else, the symbol is unknown
260 thread__find_addr_location(thread
, self
, m
, MAP__FUNCTION
,
267 ams
->al_addr
= al
.addr
;
272 struct branch_info
*machine__resolve_bstack(struct machine
*self
,
274 struct branch_stack
*bs
)
276 struct branch_info
*bi
;
279 bi
= calloc(bs
->nr
, sizeof(struct branch_info
));
283 for (i
= 0; i
< bs
->nr
; i
++) {
284 ip__resolve_ams(self
, thr
, &bi
[i
].to
, bs
->entries
[i
].to
);
285 ip__resolve_ams(self
, thr
, &bi
[i
].from
, bs
->entries
[i
].from
);
286 bi
[i
].flags
= bs
->entries
[i
].flags
;
291 int machine__resolve_callchain(struct machine
*self
,
292 struct thread
*thread
,
293 struct ip_callchain
*chain
,
294 struct symbol
**parent
)
296 u8 cpumode
= PERF_RECORD_MISC_USER
;
300 callchain_cursor_reset(&callchain_cursor
);
302 if (chain
->nr
> PERF_MAX_STACK_DEPTH
) {
303 pr_warning("corrupted callchain. skipping...\n");
307 for (i
= 0; i
< chain
->nr
; i
++) {
309 struct addr_location al
;
311 if (callchain_param
.order
== ORDER_CALLEE
)
314 ip
= chain
->ips
[chain
->nr
- i
- 1];
316 if (ip
>= PERF_CONTEXT_MAX
) {
318 case PERF_CONTEXT_HV
:
319 cpumode
= PERF_RECORD_MISC_HYPERVISOR
; break;
320 case PERF_CONTEXT_KERNEL
:
321 cpumode
= PERF_RECORD_MISC_KERNEL
; break;
322 case PERF_CONTEXT_USER
:
323 cpumode
= PERF_RECORD_MISC_USER
; break;
325 pr_debug("invalid callchain context: "
326 "%"PRId64
"\n", (s64
) ip
);
328 * It seems the callchain is corrupted.
331 callchain_cursor_reset(&callchain_cursor
);
338 thread__find_addr_location(thread
, self
, cpumode
,
339 MAP__FUNCTION
, ip
, &al
, NULL
);
340 if (al
.sym
!= NULL
) {
341 if (sort__has_parent
&& !*parent
&&
342 symbol__match_parent_regex(al
.sym
))
344 if (!symbol_conf
.use_callchain
)
348 err
= callchain_cursor_append(&callchain_cursor
,
357 static int process_event_synth_tracing_data_stub(union perf_event
*event __used
,
358 struct perf_session
*session __used
)
360 dump_printf(": unhandled!\n");
364 static int process_event_synth_attr_stub(union perf_event
*event __used
,
365 struct perf_evlist
**pevlist __used
)
367 dump_printf(": unhandled!\n");
371 static int process_event_sample_stub(struct perf_tool
*tool __used
,
372 union perf_event
*event __used
,
373 struct perf_sample
*sample __used
,
374 struct perf_evsel
*evsel __used
,
375 struct machine
*machine __used
)
377 dump_printf(": unhandled!\n");
381 static int process_event_stub(struct perf_tool
*tool __used
,
382 union perf_event
*event __used
,
383 struct perf_sample
*sample __used
,
384 struct machine
*machine __used
)
386 dump_printf(": unhandled!\n");
390 static int process_finished_round_stub(struct perf_tool
*tool __used
,
391 union perf_event
*event __used
,
392 struct perf_session
*perf_session __used
)
394 dump_printf(": unhandled!\n");
398 static int process_event_type_stub(struct perf_tool
*tool __used
,
399 union perf_event
*event __used
)
401 dump_printf(": unhandled!\n");
405 static int process_finished_round(struct perf_tool
*tool
,
406 union perf_event
*event
,
407 struct perf_session
*session
);
409 static void perf_tool__fill_defaults(struct perf_tool
*tool
)
411 if (tool
->sample
== NULL
)
412 tool
->sample
= process_event_sample_stub
;
413 if (tool
->mmap
== NULL
)
414 tool
->mmap
= process_event_stub
;
415 if (tool
->comm
== NULL
)
416 tool
->comm
= process_event_stub
;
417 if (tool
->fork
== NULL
)
418 tool
->fork
= process_event_stub
;
419 if (tool
->exit
== NULL
)
420 tool
->exit
= process_event_stub
;
421 if (tool
->lost
== NULL
)
422 tool
->lost
= perf_event__process_lost
;
423 if (tool
->read
== NULL
)
424 tool
->read
= process_event_sample_stub
;
425 if (tool
->throttle
== NULL
)
426 tool
->throttle
= process_event_stub
;
427 if (tool
->unthrottle
== NULL
)
428 tool
->unthrottle
= process_event_stub
;
429 if (tool
->attr
== NULL
)
430 tool
->attr
= process_event_synth_attr_stub
;
431 if (tool
->event_type
== NULL
)
432 tool
->event_type
= process_event_type_stub
;
433 if (tool
->tracing_data
== NULL
)
434 tool
->tracing_data
= process_event_synth_tracing_data_stub
;
435 if (tool
->build_id
== NULL
)
436 tool
->build_id
= process_finished_round_stub
;
437 if (tool
->finished_round
== NULL
) {
438 if (tool
->ordered_samples
)
439 tool
->finished_round
= process_finished_round
;
441 tool
->finished_round
= process_finished_round_stub
;
445 void mem_bswap_32(void *src
, int byte_size
)
448 while (byte_size
> 0) {
450 byte_size
-= sizeof(u32
);
455 void mem_bswap_64(void *src
, int byte_size
)
459 while (byte_size
> 0) {
461 byte_size
-= sizeof(u64
);
466 static void swap_sample_id_all(union perf_event
*event
, void *data
)
468 void *end
= (void *) event
+ event
->header
.size
;
469 int size
= end
- data
;
471 BUG_ON(size
% sizeof(u64
));
472 mem_bswap_64(data
, size
);
475 static void perf_event__all64_swap(union perf_event
*event
,
476 bool sample_id_all __used
)
478 struct perf_event_header
*hdr
= &event
->header
;
479 mem_bswap_64(hdr
+ 1, event
->header
.size
- sizeof(*hdr
));
482 static void perf_event__comm_swap(union perf_event
*event
, bool sample_id_all
)
484 event
->comm
.pid
= bswap_32(event
->comm
.pid
);
485 event
->comm
.tid
= bswap_32(event
->comm
.tid
);
488 void *data
= &event
->comm
.comm
;
490 data
+= ALIGN(strlen(data
) + 1, sizeof(u64
));
491 swap_sample_id_all(event
, data
);
495 static void perf_event__mmap_swap(union perf_event
*event
,
498 event
->mmap
.pid
= bswap_32(event
->mmap
.pid
);
499 event
->mmap
.tid
= bswap_32(event
->mmap
.tid
);
500 event
->mmap
.start
= bswap_64(event
->mmap
.start
);
501 event
->mmap
.len
= bswap_64(event
->mmap
.len
);
502 event
->mmap
.pgoff
= bswap_64(event
->mmap
.pgoff
);
505 void *data
= &event
->mmap
.filename
;
507 data
+= ALIGN(strlen(data
) + 1, sizeof(u64
));
508 swap_sample_id_all(event
, data
);
512 static void perf_event__task_swap(union perf_event
*event
, bool sample_id_all
)
514 event
->fork
.pid
= bswap_32(event
->fork
.pid
);
515 event
->fork
.tid
= bswap_32(event
->fork
.tid
);
516 event
->fork
.ppid
= bswap_32(event
->fork
.ppid
);
517 event
->fork
.ptid
= bswap_32(event
->fork
.ptid
);
518 event
->fork
.time
= bswap_64(event
->fork
.time
);
521 swap_sample_id_all(event
, &event
->fork
+ 1);
524 static void perf_event__read_swap(union perf_event
*event
, bool sample_id_all
)
526 event
->read
.pid
= bswap_32(event
->read
.pid
);
527 event
->read
.tid
= bswap_32(event
->read
.tid
);
528 event
->read
.value
= bswap_64(event
->read
.value
);
529 event
->read
.time_enabled
= bswap_64(event
->read
.time_enabled
);
530 event
->read
.time_running
= bswap_64(event
->read
.time_running
);
531 event
->read
.id
= bswap_64(event
->read
.id
);
534 swap_sample_id_all(event
, &event
->read
+ 1);
537 static u8
revbyte(u8 b
)
539 int rev
= (b
>> 4) | ((b
& 0xf) << 4);
540 rev
= ((rev
& 0xcc) >> 2) | ((rev
& 0x33) << 2);
541 rev
= ((rev
& 0xaa) >> 1) | ((rev
& 0x55) << 1);
546 * XXX this is hack in attempt to carry flags bitfield
547 * throught endian village. ABI says:
549 * Bit-fields are allocated from right to left (least to most significant)
550 * on little-endian implementations and from left to right (most to least
551 * significant) on big-endian implementations.
553 * The above seems to be byte specific, so we need to reverse each
554 * byte of the bitfield. 'Internet' also says this might be implementation
555 * specific and we probably need proper fix and carry perf_event_attr
556 * bitfield flags in separate data file FEAT_ section. Thought this seems
559 static void swap_bitfield(u8
*p
, unsigned len
)
563 for (i
= 0; i
< len
; i
++) {
569 /* exported for swapping attributes in file header */
570 void perf_event__attr_swap(struct perf_event_attr
*attr
)
572 attr
->type
= bswap_32(attr
->type
);
573 attr
->size
= bswap_32(attr
->size
);
574 attr
->config
= bswap_64(attr
->config
);
575 attr
->sample_period
= bswap_64(attr
->sample_period
);
576 attr
->sample_type
= bswap_64(attr
->sample_type
);
577 attr
->read_format
= bswap_64(attr
->read_format
);
578 attr
->wakeup_events
= bswap_32(attr
->wakeup_events
);
579 attr
->bp_type
= bswap_32(attr
->bp_type
);
580 attr
->bp_addr
= bswap_64(attr
->bp_addr
);
581 attr
->bp_len
= bswap_64(attr
->bp_len
);
583 swap_bitfield((u8
*) (&attr
->read_format
+ 1), sizeof(u64
));
586 static void perf_event__hdr_attr_swap(union perf_event
*event
,
587 bool sample_id_all __used
)
591 perf_event__attr_swap(&event
->attr
.attr
);
593 size
= event
->header
.size
;
594 size
-= (void *)&event
->attr
.id
- (void *)event
;
595 mem_bswap_64(event
->attr
.id
, size
);
598 static void perf_event__event_type_swap(union perf_event
*event
,
599 bool sample_id_all __used
)
601 event
->event_type
.event_type
.event_id
=
602 bswap_64(event
->event_type
.event_type
.event_id
);
605 static void perf_event__tracing_data_swap(union perf_event
*event
,
606 bool sample_id_all __used
)
608 event
->tracing_data
.size
= bswap_32(event
->tracing_data
.size
);
611 typedef void (*perf_event__swap_op
)(union perf_event
*event
,
614 static perf_event__swap_op perf_event__swap_ops
[] = {
615 [PERF_RECORD_MMAP
] = perf_event__mmap_swap
,
616 [PERF_RECORD_COMM
] = perf_event__comm_swap
,
617 [PERF_RECORD_FORK
] = perf_event__task_swap
,
618 [PERF_RECORD_EXIT
] = perf_event__task_swap
,
619 [PERF_RECORD_LOST
] = perf_event__all64_swap
,
620 [PERF_RECORD_READ
] = perf_event__read_swap
,
621 [PERF_RECORD_SAMPLE
] = perf_event__all64_swap
,
622 [PERF_RECORD_HEADER_ATTR
] = perf_event__hdr_attr_swap
,
623 [PERF_RECORD_HEADER_EVENT_TYPE
] = perf_event__event_type_swap
,
624 [PERF_RECORD_HEADER_TRACING_DATA
] = perf_event__tracing_data_swap
,
625 [PERF_RECORD_HEADER_BUILD_ID
] = NULL
,
626 [PERF_RECORD_HEADER_MAX
] = NULL
,
629 struct sample_queue
{
632 union perf_event
*event
;
633 struct list_head list
;
636 static void perf_session_free_sample_buffers(struct perf_session
*session
)
638 struct ordered_samples
*os
= &session
->ordered_samples
;
640 while (!list_empty(&os
->to_free
)) {
641 struct sample_queue
*sq
;
643 sq
= list_entry(os
->to_free
.next
, struct sample_queue
, list
);
649 static int perf_session_deliver_event(struct perf_session
*session
,
650 union perf_event
*event
,
651 struct perf_sample
*sample
,
652 struct perf_tool
*tool
,
655 static void flush_sample_queue(struct perf_session
*s
,
656 struct perf_tool
*tool
)
658 struct ordered_samples
*os
= &s
->ordered_samples
;
659 struct list_head
*head
= &os
->samples
;
660 struct sample_queue
*tmp
, *iter
;
661 struct perf_sample sample
;
662 u64 limit
= os
->next_flush
;
663 u64 last_ts
= os
->last_sample
? os
->last_sample
->timestamp
: 0ULL;
664 unsigned idx
= 0, progress_next
= os
->nr_samples
/ 16;
667 if (!tool
->ordered_samples
|| !limit
)
670 list_for_each_entry_safe(iter
, tmp
, head
, list
) {
671 if (iter
->timestamp
> limit
)
674 ret
= perf_evlist__parse_sample(s
->evlist
, iter
->event
, &sample
,
675 s
->header
.needs_swap
);
677 pr_err("Can't parse sample, err = %d\n", ret
);
679 perf_session_deliver_event(s
, iter
->event
, &sample
, tool
,
682 os
->last_flush
= iter
->timestamp
;
683 list_del(&iter
->list
);
684 list_add(&iter
->list
, &os
->sample_cache
);
685 if (++idx
>= progress_next
) {
686 progress_next
+= os
->nr_samples
/ 16;
687 ui_progress__update(idx
, os
->nr_samples
,
688 "Processing time ordered events...");
692 if (list_empty(head
)) {
693 os
->last_sample
= NULL
;
694 } else if (last_ts
<= limit
) {
696 list_entry(head
->prev
, struct sample_queue
, list
);
703 * When perf record finishes a pass on every buffers, it records this pseudo
705 * We record the max timestamp t found in the pass n.
706 * Assuming these timestamps are monotonic across cpus, we know that if
707 * a buffer still has events with timestamps below t, they will be all
708 * available and then read in the pass n + 1.
709 * Hence when we start to read the pass n + 2, we can safely flush every
710 * events with timestamps below t.
712 * ============ PASS n =================
715 * cnt1 timestamps | cnt2 timestamps
718 * - | 4 <--- max recorded
720 * ============ PASS n + 1 ==============
723 * cnt1 timestamps | cnt2 timestamps
726 * 5 | 7 <---- max recorded
728 * Flush every events below timestamp 4
730 * ============ PASS n + 2 ==============
733 * cnt1 timestamps | cnt2 timestamps
738 * Flush every events below timestamp 7
741 static int process_finished_round(struct perf_tool
*tool
,
742 union perf_event
*event __used
,
743 struct perf_session
*session
)
745 flush_sample_queue(session
, tool
);
746 session
->ordered_samples
.next_flush
= session
->ordered_samples
.max_timestamp
;
751 /* The queue is ordered by time */
752 static void __queue_event(struct sample_queue
*new, struct perf_session
*s
)
754 struct ordered_samples
*os
= &s
->ordered_samples
;
755 struct sample_queue
*sample
= os
->last_sample
;
756 u64 timestamp
= new->timestamp
;
760 os
->last_sample
= new;
763 list_add(&new->list
, &os
->samples
);
764 os
->max_timestamp
= timestamp
;
769 * last_sample might point to some random place in the list as it's
770 * the last queued event. We expect that the new event is close to
773 if (sample
->timestamp
<= timestamp
) {
774 while (sample
->timestamp
<= timestamp
) {
775 p
= sample
->list
.next
;
776 if (p
== &os
->samples
) {
777 list_add_tail(&new->list
, &os
->samples
);
778 os
->max_timestamp
= timestamp
;
781 sample
= list_entry(p
, struct sample_queue
, list
);
783 list_add_tail(&new->list
, &sample
->list
);
785 while (sample
->timestamp
> timestamp
) {
786 p
= sample
->list
.prev
;
787 if (p
== &os
->samples
) {
788 list_add(&new->list
, &os
->samples
);
791 sample
= list_entry(p
, struct sample_queue
, list
);
793 list_add(&new->list
, &sample
->list
);
797 #define MAX_SAMPLE_BUFFER (64 * 1024 / sizeof(struct sample_queue))
799 static int perf_session_queue_event(struct perf_session
*s
, union perf_event
*event
,
800 struct perf_sample
*sample
, u64 file_offset
)
802 struct ordered_samples
*os
= &s
->ordered_samples
;
803 struct list_head
*sc
= &os
->sample_cache
;
804 u64 timestamp
= sample
->time
;
805 struct sample_queue
*new;
807 if (!timestamp
|| timestamp
== ~0ULL)
810 if (timestamp
< s
->ordered_samples
.last_flush
) {
811 printf("Warning: Timestamp below last timeslice flush\n");
815 if (!list_empty(sc
)) {
816 new = list_entry(sc
->next
, struct sample_queue
, list
);
817 list_del(&new->list
);
818 } else if (os
->sample_buffer
) {
819 new = os
->sample_buffer
+ os
->sample_buffer_idx
;
820 if (++os
->sample_buffer_idx
== MAX_SAMPLE_BUFFER
)
821 os
->sample_buffer
= NULL
;
823 os
->sample_buffer
= malloc(MAX_SAMPLE_BUFFER
* sizeof(*new));
824 if (!os
->sample_buffer
)
826 list_add(&os
->sample_buffer
->list
, &os
->to_free
);
827 os
->sample_buffer_idx
= 2;
828 new = os
->sample_buffer
+ 1;
831 new->timestamp
= timestamp
;
832 new->file_offset
= file_offset
;
835 __queue_event(new, s
);
840 static void callchain__printf(struct perf_sample
*sample
)
844 printf("... chain: nr:%" PRIu64
"\n", sample
->callchain
->nr
);
846 for (i
= 0; i
< sample
->callchain
->nr
; i
++)
847 printf("..... %2d: %016" PRIx64
"\n",
848 i
, sample
->callchain
->ips
[i
]);
851 static void branch_stack__printf(struct perf_sample
*sample
)
855 printf("... branch stack: nr:%" PRIu64
"\n", sample
->branch_stack
->nr
);
857 for (i
= 0; i
< sample
->branch_stack
->nr
; i
++)
858 printf("..... %2"PRIu64
": %016" PRIx64
" -> %016" PRIx64
"\n",
859 i
, sample
->branch_stack
->entries
[i
].from
,
860 sample
->branch_stack
->entries
[i
].to
);
863 static void perf_session__print_tstamp(struct perf_session
*session
,
864 union perf_event
*event
,
865 struct perf_sample
*sample
)
867 u64 sample_type
= perf_evlist__sample_type(session
->evlist
);
869 if (event
->header
.type
!= PERF_RECORD_SAMPLE
&&
870 !perf_evlist__sample_id_all(session
->evlist
)) {
871 fputs("-1 -1 ", stdout
);
875 if ((sample_type
& PERF_SAMPLE_CPU
))
876 printf("%u ", sample
->cpu
);
878 if (sample_type
& PERF_SAMPLE_TIME
)
879 printf("%" PRIu64
" ", sample
->time
);
882 static void dump_event(struct perf_session
*session
, union perf_event
*event
,
883 u64 file_offset
, struct perf_sample
*sample
)
888 printf("\n%#" PRIx64
" [%#x]: event: %d\n",
889 file_offset
, event
->header
.size
, event
->header
.type
);
894 perf_session__print_tstamp(session
, event
, sample
);
896 printf("%#" PRIx64
" [%#x]: PERF_RECORD_%s", file_offset
,
897 event
->header
.size
, perf_event__name(event
->header
.type
));
900 static void dump_sample(struct perf_session
*session
, union perf_event
*event
,
901 struct perf_sample
*sample
)
908 printf("(IP, %d): %d/%d: %#" PRIx64
" period: %" PRIu64
" addr: %#" PRIx64
"\n",
909 event
->header
.misc
, sample
->pid
, sample
->tid
, sample
->ip
,
910 sample
->period
, sample
->addr
);
912 sample_type
= perf_evlist__sample_type(session
->evlist
);
914 if (sample_type
& PERF_SAMPLE_CALLCHAIN
)
915 callchain__printf(sample
);
917 if (sample_type
& PERF_SAMPLE_BRANCH_STACK
)
918 branch_stack__printf(sample
);
921 static struct machine
*
922 perf_session__find_machine_for_cpumode(struct perf_session
*session
,
923 union perf_event
*event
)
925 const u8 cpumode
= event
->header
.misc
& PERF_RECORD_MISC_CPUMODE_MASK
;
928 ((cpumode
== PERF_RECORD_MISC_GUEST_KERNEL
) ||
929 (cpumode
== PERF_RECORD_MISC_GUEST_USER
))) {
932 if (event
->header
.type
== PERF_RECORD_MMAP
)
933 pid
= event
->mmap
.pid
;
937 return perf_session__findnew_machine(session
, pid
);
940 return perf_session__find_host_machine(session
);
943 static int perf_session_deliver_event(struct perf_session
*session
,
944 union perf_event
*event
,
945 struct perf_sample
*sample
,
946 struct perf_tool
*tool
,
949 struct perf_evsel
*evsel
;
950 struct machine
*machine
;
952 dump_event(session
, event
, file_offset
, sample
);
954 evsel
= perf_evlist__id2evsel(session
->evlist
, sample
->id
);
955 if (evsel
!= NULL
&& event
->header
.type
!= PERF_RECORD_SAMPLE
) {
957 * XXX We're leaving PERF_RECORD_SAMPLE unnacounted here
958 * because the tools right now may apply filters, discarding
959 * some of the samples. For consistency, in the future we
960 * should have something like nr_filtered_samples and remove
961 * the sample->period from total_sample_period, etc, KISS for
964 * Also testing against NULL allows us to handle files without
965 * attr.sample_id_all and/or without PERF_SAMPLE_ID. In the
966 * future probably it'll be a good idea to restrict event
967 * processing via perf_session to files with both set.
969 hists__inc_nr_events(&evsel
->hists
, event
->header
.type
);
972 machine
= perf_session__find_machine_for_cpumode(session
, event
);
974 switch (event
->header
.type
) {
975 case PERF_RECORD_SAMPLE
:
976 dump_sample(session
, event
, sample
);
978 ++session
->hists
.stats
.nr_unknown_id
;
981 if (machine
== NULL
) {
982 ++session
->hists
.stats
.nr_unprocessable_samples
;
985 return tool
->sample(tool
, event
, sample
, evsel
, machine
);
986 case PERF_RECORD_MMAP
:
987 return tool
->mmap(tool
, event
, sample
, machine
);
988 case PERF_RECORD_COMM
:
989 return tool
->comm(tool
, event
, sample
, machine
);
990 case PERF_RECORD_FORK
:
991 return tool
->fork(tool
, event
, sample
, machine
);
992 case PERF_RECORD_EXIT
:
993 return tool
->exit(tool
, event
, sample
, machine
);
994 case PERF_RECORD_LOST
:
995 if (tool
->lost
== perf_event__process_lost
)
996 session
->hists
.stats
.total_lost
+= event
->lost
.lost
;
997 return tool
->lost(tool
, event
, sample
, machine
);
998 case PERF_RECORD_READ
:
999 return tool
->read(tool
, event
, sample
, evsel
, machine
);
1000 case PERF_RECORD_THROTTLE
:
1001 return tool
->throttle(tool
, event
, sample
, machine
);
1002 case PERF_RECORD_UNTHROTTLE
:
1003 return tool
->unthrottle(tool
, event
, sample
, machine
);
1005 ++session
->hists
.stats
.nr_unknown_events
;
1010 static int perf_session__preprocess_sample(struct perf_session
*session
,
1011 union perf_event
*event
, struct perf_sample
*sample
)
1013 if (event
->header
.type
!= PERF_RECORD_SAMPLE
||
1014 !(perf_evlist__sample_type(session
->evlist
) & PERF_SAMPLE_CALLCHAIN
))
1017 if (!ip_callchain__valid(sample
->callchain
, event
)) {
1018 pr_debug("call-chain problem with event, skipping it.\n");
1019 ++session
->hists
.stats
.nr_invalid_chains
;
1020 session
->hists
.stats
.total_invalid_chains
+= sample
->period
;
1026 static int perf_session__process_user_event(struct perf_session
*session
, union perf_event
*event
,
1027 struct perf_tool
*tool
, u64 file_offset
)
1031 dump_event(session
, event
, file_offset
, NULL
);
1033 /* These events are processed right away */
1034 switch (event
->header
.type
) {
1035 case PERF_RECORD_HEADER_ATTR
:
1036 err
= tool
->attr(event
, &session
->evlist
);
1038 perf_session__set_id_hdr_size(session
);
1040 case PERF_RECORD_HEADER_EVENT_TYPE
:
1041 return tool
->event_type(tool
, event
);
1042 case PERF_RECORD_HEADER_TRACING_DATA
:
1043 /* setup for reading amidst mmap */
1044 lseek(session
->fd
, file_offset
, SEEK_SET
);
1045 return tool
->tracing_data(event
, session
);
1046 case PERF_RECORD_HEADER_BUILD_ID
:
1047 return tool
->build_id(tool
, event
, session
);
1048 case PERF_RECORD_FINISHED_ROUND
:
1049 return tool
->finished_round(tool
, event
, session
);
1055 static void event_swap(union perf_event
*event
, bool sample_id_all
)
1057 perf_event__swap_op swap
;
1059 swap
= perf_event__swap_ops
[event
->header
.type
];
1061 swap(event
, sample_id_all
);
1064 static int perf_session__process_event(struct perf_session
*session
,
1065 union perf_event
*event
,
1066 struct perf_tool
*tool
,
1069 struct perf_sample sample
;
1072 if (session
->header
.needs_swap
)
1073 event_swap(event
, perf_evlist__sample_id_all(session
->evlist
));
1075 if (event
->header
.type
>= PERF_RECORD_HEADER_MAX
)
1078 hists__inc_nr_events(&session
->hists
, event
->header
.type
);
1080 if (event
->header
.type
>= PERF_RECORD_USER_TYPE_START
)
1081 return perf_session__process_user_event(session
, event
, tool
, file_offset
);
1084 * For all kernel events we get the sample data
1086 ret
= perf_evlist__parse_sample(session
->evlist
, event
, &sample
,
1087 session
->header
.needs_swap
);
1091 /* Preprocess sample records - precheck callchains */
1092 if (perf_session__preprocess_sample(session
, event
, &sample
))
1095 if (tool
->ordered_samples
) {
1096 ret
= perf_session_queue_event(session
, event
, &sample
,
1102 return perf_session_deliver_event(session
, event
, &sample
, tool
,
1106 void perf_event_header__bswap(struct perf_event_header
*self
)
1108 self
->type
= bswap_32(self
->type
);
1109 self
->misc
= bswap_16(self
->misc
);
1110 self
->size
= bswap_16(self
->size
);
1113 struct thread
*perf_session__findnew(struct perf_session
*session
, pid_t pid
)
1115 return machine__findnew_thread(&session
->host_machine
, pid
);
1118 static struct thread
*perf_session__register_idle_thread(struct perf_session
*self
)
1120 struct thread
*thread
= perf_session__findnew(self
, 0);
1122 if (thread
== NULL
|| thread__set_comm(thread
, "swapper")) {
1123 pr_err("problem inserting idle task.\n");
1130 static void perf_session__warn_about_errors(const struct perf_session
*session
,
1131 const struct perf_tool
*tool
)
1133 if (tool
->lost
== perf_event__process_lost
&&
1134 session
->hists
.stats
.nr_events
[PERF_RECORD_LOST
] != 0) {
1135 ui__warning("Processed %d events and lost %d chunks!\n\n"
1136 "Check IO/CPU overload!\n\n",
1137 session
->hists
.stats
.nr_events
[0],
1138 session
->hists
.stats
.nr_events
[PERF_RECORD_LOST
]);
1141 if (session
->hists
.stats
.nr_unknown_events
!= 0) {
1142 ui__warning("Found %u unknown events!\n\n"
1143 "Is this an older tool processing a perf.data "
1144 "file generated by a more recent tool?\n\n"
1145 "If that is not the case, consider "
1146 "reporting to linux-kernel@vger.kernel.org.\n\n",
1147 session
->hists
.stats
.nr_unknown_events
);
1150 if (session
->hists
.stats
.nr_unknown_id
!= 0) {
1151 ui__warning("%u samples with id not present in the header\n",
1152 session
->hists
.stats
.nr_unknown_id
);
1155 if (session
->hists
.stats
.nr_invalid_chains
!= 0) {
1156 ui__warning("Found invalid callchains!\n\n"
1157 "%u out of %u events were discarded for this reason.\n\n"
1158 "Consider reporting to linux-kernel@vger.kernel.org.\n\n",
1159 session
->hists
.stats
.nr_invalid_chains
,
1160 session
->hists
.stats
.nr_events
[PERF_RECORD_SAMPLE
]);
1163 if (session
->hists
.stats
.nr_unprocessable_samples
!= 0) {
1164 ui__warning("%u unprocessable samples recorded.\n"
1165 "Do you have a KVM guest running and not using 'perf kvm'?\n",
1166 session
->hists
.stats
.nr_unprocessable_samples
);
1170 #define session_done() (*(volatile int *)(&session_done))
1171 volatile int session_done
;
1173 static int __perf_session__process_pipe_events(struct perf_session
*self
,
1174 struct perf_tool
*tool
)
1176 union perf_event
*event
;
1177 uint32_t size
, cur_size
= 0;
1184 perf_tool__fill_defaults(tool
);
1187 cur_size
= sizeof(union perf_event
);
1189 buf
= malloc(cur_size
);
1194 err
= readn(self
->fd
, event
, sizeof(struct perf_event_header
));
1199 pr_err("failed to read event header\n");
1203 if (self
->header
.needs_swap
)
1204 perf_event_header__bswap(&event
->header
);
1206 size
= event
->header
.size
;
1210 if (size
> cur_size
) {
1211 void *new = realloc(buf
, size
);
1213 pr_err("failed to allocate memory to read event\n");
1221 p
+= sizeof(struct perf_event_header
);
1223 if (size
- sizeof(struct perf_event_header
)) {
1224 err
= readn(self
->fd
, p
, size
- sizeof(struct perf_event_header
));
1227 pr_err("unexpected end of event stream\n");
1231 pr_err("failed to read event data\n");
1236 if ((skip
= perf_session__process_event(self
, event
, tool
, head
)) < 0) {
1237 pr_err("%#" PRIx64
" [%#x]: failed to process type: %d\n",
1238 head
, event
->header
.size
, event
->header
.type
);
1248 if (!session_done())
1254 perf_session__warn_about_errors(self
, tool
);
1255 perf_session_free_sample_buffers(self
);
1259 static union perf_event
*
1260 fetch_mmaped_event(struct perf_session
*session
,
1261 u64 head
, size_t mmap_size
, char *buf
)
1263 union perf_event
*event
;
1266 * Ensure we have enough space remaining to read
1267 * the size of the event in the headers.
1269 if (head
+ sizeof(event
->header
) > mmap_size
)
1272 event
= (union perf_event
*)(buf
+ head
);
1274 if (session
->header
.needs_swap
)
1275 perf_event_header__bswap(&event
->header
);
1277 if (head
+ event
->header
.size
> mmap_size
)
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 u64 head
, page_offset
, file_offset
, file_pos
, progress_next
;
1288 int err
, mmap_prot
, mmap_flags
, map_idx
= 0;
1289 size_t page_size
, mmap_size
;
1290 char *buf
, *mmaps
[8];
1291 union perf_event
*event
;
1294 perf_tool__fill_defaults(tool
);
1296 page_size
= sysconf(_SC_PAGESIZE
);
1298 page_offset
= page_size
* (data_offset
/ page_size
);
1299 file_offset
= page_offset
;
1300 head
= data_offset
- page_offset
;
1302 if (data_offset
+ data_size
< file_size
)
1303 file_size
= data_offset
+ data_size
;
1305 progress_next
= file_size
/ 16;
1307 mmap_size
= session
->mmap_window
;
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
, session
->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
;
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 if (file_pos
>= progress_next
) {
1361 progress_next
+= file_size
/ 16;
1362 ui_progress__update(file_pos
, file_size
,
1363 "Processing events...");
1366 if (file_pos
< file_size
)
1370 /* do the final flush for ordered samples */
1371 session
->ordered_samples
.next_flush
= ULLONG_MAX
;
1372 flush_sample_queue(session
, tool
);
1374 perf_session__warn_about_errors(session
, tool
);
1375 perf_session_free_sample_buffers(session
);
1379 int perf_session__process_events(struct perf_session
*self
,
1380 struct perf_tool
*tool
)
1384 if (perf_session__register_idle_thread(self
) == NULL
)
1388 err
= __perf_session__process_events(self
,
1389 self
->header
.data_offset
,
1390 self
->header
.data_size
,
1393 err
= __perf_session__process_pipe_events(self
, tool
);
1398 bool perf_session__has_traces(struct perf_session
*session
, const char *msg
)
1400 if (!(perf_evlist__sample_type(session
->evlist
) & PERF_SAMPLE_RAW
)) {
1401 pr_err("No trace sample to read. Did you call 'perf %s'?\n", msg
);
1408 int maps__set_kallsyms_ref_reloc_sym(struct map
**maps
,
1409 const char *symbol_name
, u64 addr
)
1413 struct ref_reloc_sym
*ref
;
1415 ref
= zalloc(sizeof(struct ref_reloc_sym
));
1419 ref
->name
= strdup(symbol_name
);
1420 if (ref
->name
== NULL
) {
1425 bracket
= strchr(ref
->name
, ']');
1431 for (i
= 0; i
< MAP__NR_TYPES
; ++i
) {
1432 struct kmap
*kmap
= map__kmap(maps
[i
]);
1433 kmap
->ref_reloc_sym
= ref
;
1439 size_t perf_session__fprintf_dsos(struct perf_session
*self
, FILE *fp
)
1441 return __dsos__fprintf(&self
->host_machine
.kernel_dsos
, fp
) +
1442 __dsos__fprintf(&self
->host_machine
.user_dsos
, fp
) +
1443 machines__fprintf_dsos(&self
->machines
, fp
);
1446 size_t perf_session__fprintf_dsos_buildid(struct perf_session
*self
, FILE *fp
,
1449 size_t ret
= machine__fprintf_dsos_buildid(&self
->host_machine
, fp
, with_hits
);
1450 return ret
+ machines__fprintf_dsos_buildid(&self
->machines
, fp
, with_hits
);
1453 size_t perf_session__fprintf_nr_events(struct perf_session
*session
, FILE *fp
)
1455 struct perf_evsel
*pos
;
1456 size_t ret
= fprintf(fp
, "Aggregated stats:\n");
1458 ret
+= hists__fprintf_nr_events(&session
->hists
, fp
);
1460 list_for_each_entry(pos
, &session
->evlist
->entries
, node
) {
1461 ret
+= fprintf(fp
, "%s stats:\n", perf_evsel__name(pos
));
1462 ret
+= hists__fprintf_nr_events(&pos
->hists
, fp
);
1468 size_t perf_session__fprintf(struct perf_session
*session
, FILE *fp
)
1471 * FIXME: Here we have to actually print all the machines in this
1472 * session, not just the host...
1474 return machine__fprintf(&session
->host_machine
, fp
);
1477 void perf_session__remove_thread(struct perf_session
*session
,
1481 * FIXME: This one makes no sense, we need to remove the thread from
1482 * the machine it belongs to, perf_session can have many machines, so
1483 * doing it always on ->host_machine is wrong. Fix when auditing all
1484 * the 'perf kvm' code.
1486 machine__remove_thread(&session
->host_machine
, th
);
1489 struct perf_evsel
*perf_session__find_first_evtype(struct perf_session
*session
,
1492 struct perf_evsel
*pos
;
1494 list_for_each_entry(pos
, &session
->evlist
->entries
, node
) {
1495 if (pos
->attr
.type
== type
)
1501 void perf_event__print_ip(union perf_event
*event
, struct perf_sample
*sample
,
1502 struct machine
*machine
, int print_sym
,
1503 int print_dso
, int print_symoffset
)
1505 struct addr_location al
;
1506 struct callchain_cursor_node
*node
;
1508 if (perf_event__preprocess_sample(event
, machine
, &al
, sample
,
1510 error("problem processing %d event, skipping it.\n",
1511 event
->header
.type
);
1515 if (symbol_conf
.use_callchain
&& sample
->callchain
) {
1517 if (machine__resolve_callchain(machine
, al
.thread
,
1518 sample
->callchain
, NULL
) != 0) {
1520 error("Failed to resolve callchain. Skipping\n");
1523 callchain_cursor_commit(&callchain_cursor
);
1526 node
= callchain_cursor_current(&callchain_cursor
);
1530 printf("\t%16" PRIx64
, node
->ip
);
1533 symbol__fprintf_symname(node
->sym
, stdout
);
1537 map__fprintf_dsoname(node
->map
, stdout
);
1542 callchain_cursor_advance(&callchain_cursor
);
1546 printf("%16" PRIx64
, sample
->ip
);
1549 if (print_symoffset
)
1550 symbol__fprintf_symname_offs(al
.sym
, &al
,
1553 symbol__fprintf_symname(al
.sym
, stdout
);
1558 map__fprintf_dsoname(al
.map
, stdout
);
1564 int perf_session__cpu_bitmap(struct perf_session
*session
,
1565 const char *cpu_list
, unsigned long *cpu_bitmap
)
1568 struct cpu_map
*map
;
1570 for (i
= 0; i
< PERF_TYPE_MAX
; ++i
) {
1571 struct perf_evsel
*evsel
;
1573 evsel
= perf_session__find_first_evtype(session
, i
);
1577 if (!(evsel
->attr
.sample_type
& PERF_SAMPLE_CPU
)) {
1578 pr_err("File does not contain CPU events. "
1579 "Remove -c option to proceed.\n");
1584 map
= cpu_map__new(cpu_list
);
1586 pr_err("Invalid cpu_list\n");
1590 for (i
= 0; i
< map
->nr
; i
++) {
1591 int cpu
= map
->map
[i
];
1593 if (cpu
>= MAX_NR_CPUS
) {
1594 pr_err("Requested CPU %d too large. "
1595 "Consider raising MAX_NR_CPUS\n", cpu
);
1599 set_bit(cpu
, cpu_bitmap
);
1605 void perf_session__fprintf_info(struct perf_session
*session
, FILE *fp
,
1611 if (session
== NULL
|| fp
== NULL
)
1614 ret
= fstat(session
->fd
, &st
);
1618 fprintf(fp
, "# ========\n");
1619 fprintf(fp
, "# captured on: %s", ctime(&st
.st_ctime
));
1620 perf_header__fprintf_info(session
, fp
, full
);
1621 fprintf(fp
, "# ========\n#\n");
1625 int __perf_session__set_tracepoints_handlers(struct perf_session
*session
,
1626 const struct perf_evsel_str_handler
*assocs
,
1629 struct perf_evlist
*evlist
= session
->evlist
;
1630 struct event_format
*format
;
1631 struct perf_evsel
*evsel
;
1632 char *tracepoint
, *name
;
1636 for (i
= 0; i
< nr_assocs
; i
++) {
1638 tracepoint
= strdup(assocs
[i
].name
);
1639 if (tracepoint
== NULL
)
1643 name
= strchr(tracepoint
, ':');
1648 format
= pevent_find_event_by_name(session
->pevent
,
1650 if (format
== NULL
) {
1652 * Adding a handler for an event not in the session,
1658 evsel
= perf_evlist__find_tracepoint_by_id(evlist
, format
->id
);
1663 if (evsel
->handler
.func
!= NULL
)
1665 evsel
->handler
.func
= assocs
[i
].handler
;