2 * Copyright (C) 2011, Red Hat Inc, Arnaldo Carvalho de Melo <acme@redhat.com>
4 * Parts came from builtin-{top,stat,record}.c, see those files for further
7 * Released under the GPL v2. (and only v2, not any later version)
11 #include <linux/bitops.h>
12 #include <api/fs/debugfs.h>
13 #include <traceevent/event-parse.h>
14 #include <linux/hw_breakpoint.h>
15 #include <linux/perf_event.h>
16 #include <sys/resource.h>
18 #include "callchain.h"
24 #include "thread_map.h"
26 #include "perf_regs.h"
28 #include "trace-event.h"
38 } perf_missing_features
;
40 static clockid_t clockid
;
42 static int perf_evsel__no_extra_init(struct perf_evsel
*evsel __maybe_unused
)
47 static void perf_evsel__no_extra_fini(struct perf_evsel
*evsel __maybe_unused
)
53 int (*init
)(struct perf_evsel
*evsel
);
54 void (*fini
)(struct perf_evsel
*evsel
);
55 } perf_evsel__object
= {
56 .size
= sizeof(struct perf_evsel
),
57 .init
= perf_evsel__no_extra_init
,
58 .fini
= perf_evsel__no_extra_fini
,
61 int perf_evsel__object_config(size_t object_size
,
62 int (*init
)(struct perf_evsel
*evsel
),
63 void (*fini
)(struct perf_evsel
*evsel
))
69 if (perf_evsel__object
.size
> object_size
)
72 perf_evsel__object
.size
= object_size
;
76 perf_evsel__object
.init
= init
;
79 perf_evsel__object
.fini
= fini
;
84 #define FD(e, x, y) (*(int *)xyarray__entry(e->fd, x, y))
86 int __perf_evsel__sample_size(u64 sample_type
)
88 u64 mask
= sample_type
& PERF_SAMPLE_MASK
;
92 for (i
= 0; i
< 64; i
++) {
93 if (mask
& (1ULL << i
))
103 * __perf_evsel__calc_id_pos - calculate id_pos.
104 * @sample_type: sample type
106 * This function returns the position of the event id (PERF_SAMPLE_ID or
107 * PERF_SAMPLE_IDENTIFIER) in a sample event i.e. in the array of struct
110 static int __perf_evsel__calc_id_pos(u64 sample_type
)
114 if (sample_type
& PERF_SAMPLE_IDENTIFIER
)
117 if (!(sample_type
& PERF_SAMPLE_ID
))
120 if (sample_type
& PERF_SAMPLE_IP
)
123 if (sample_type
& PERF_SAMPLE_TID
)
126 if (sample_type
& PERF_SAMPLE_TIME
)
129 if (sample_type
& PERF_SAMPLE_ADDR
)
136 * __perf_evsel__calc_is_pos - calculate is_pos.
137 * @sample_type: sample type
139 * This function returns the position (counting backwards) of the event id
140 * (PERF_SAMPLE_ID or PERF_SAMPLE_IDENTIFIER) in a non-sample event i.e. if
141 * sample_id_all is used there is an id sample appended to non-sample events.
143 static int __perf_evsel__calc_is_pos(u64 sample_type
)
147 if (sample_type
& PERF_SAMPLE_IDENTIFIER
)
150 if (!(sample_type
& PERF_SAMPLE_ID
))
153 if (sample_type
& PERF_SAMPLE_CPU
)
156 if (sample_type
& PERF_SAMPLE_STREAM_ID
)
162 void perf_evsel__calc_id_pos(struct perf_evsel
*evsel
)
164 evsel
->id_pos
= __perf_evsel__calc_id_pos(evsel
->attr
.sample_type
);
165 evsel
->is_pos
= __perf_evsel__calc_is_pos(evsel
->attr
.sample_type
);
168 void __perf_evsel__set_sample_bit(struct perf_evsel
*evsel
,
169 enum perf_event_sample_format bit
)
171 if (!(evsel
->attr
.sample_type
& bit
)) {
172 evsel
->attr
.sample_type
|= bit
;
173 evsel
->sample_size
+= sizeof(u64
);
174 perf_evsel__calc_id_pos(evsel
);
178 void __perf_evsel__reset_sample_bit(struct perf_evsel
*evsel
,
179 enum perf_event_sample_format bit
)
181 if (evsel
->attr
.sample_type
& bit
) {
182 evsel
->attr
.sample_type
&= ~bit
;
183 evsel
->sample_size
-= sizeof(u64
);
184 perf_evsel__calc_id_pos(evsel
);
188 void perf_evsel__set_sample_id(struct perf_evsel
*evsel
,
189 bool can_sample_identifier
)
191 if (can_sample_identifier
) {
192 perf_evsel__reset_sample_bit(evsel
, ID
);
193 perf_evsel__set_sample_bit(evsel
, IDENTIFIER
);
195 perf_evsel__set_sample_bit(evsel
, ID
);
197 evsel
->attr
.read_format
|= PERF_FORMAT_ID
;
200 void perf_evsel__init(struct perf_evsel
*evsel
,
201 struct perf_event_attr
*attr
, int idx
)
204 evsel
->tracking
= !idx
;
206 evsel
->leader
= evsel
;
209 INIT_LIST_HEAD(&evsel
->node
);
210 perf_evsel__object
.init(evsel
);
211 evsel
->sample_size
= __perf_evsel__sample_size(attr
->sample_type
);
212 perf_evsel__calc_id_pos(evsel
);
215 struct perf_evsel
*perf_evsel__new_idx(struct perf_event_attr
*attr
, int idx
)
217 struct perf_evsel
*evsel
= zalloc(perf_evsel__object
.size
);
220 perf_evsel__init(evsel
, attr
, idx
);
225 struct perf_evsel
*perf_evsel__newtp_idx(const char *sys
, const char *name
, int idx
)
227 struct perf_evsel
*evsel
= zalloc(perf_evsel__object
.size
);
230 struct perf_event_attr attr
= {
231 .type
= PERF_TYPE_TRACEPOINT
,
232 .sample_type
= (PERF_SAMPLE_RAW
| PERF_SAMPLE_TIME
|
233 PERF_SAMPLE_CPU
| PERF_SAMPLE_PERIOD
),
236 if (asprintf(&evsel
->name
, "%s:%s", sys
, name
) < 0)
239 evsel
->tp_format
= trace_event__tp_format(sys
, name
);
240 if (evsel
->tp_format
== NULL
)
243 event_attr_init(&attr
);
244 attr
.config
= evsel
->tp_format
->id
;
245 attr
.sample_period
= 1;
246 perf_evsel__init(evsel
, &attr
, idx
);
257 const char *perf_evsel__hw_names
[PERF_COUNT_HW_MAX
] = {
265 "stalled-cycles-frontend",
266 "stalled-cycles-backend",
270 static const char *__perf_evsel__hw_name(u64 config
)
272 if (config
< PERF_COUNT_HW_MAX
&& perf_evsel__hw_names
[config
])
273 return perf_evsel__hw_names
[config
];
275 return "unknown-hardware";
278 static int perf_evsel__add_modifiers(struct perf_evsel
*evsel
, char *bf
, size_t size
)
280 int colon
= 0, r
= 0;
281 struct perf_event_attr
*attr
= &evsel
->attr
;
282 bool exclude_guest_default
= false;
284 #define MOD_PRINT(context, mod) do { \
285 if (!attr->exclude_##context) { \
286 if (!colon) colon = ++r; \
287 r += scnprintf(bf + r, size - r, "%c", mod); \
290 if (attr
->exclude_kernel
|| attr
->exclude_user
|| attr
->exclude_hv
) {
291 MOD_PRINT(kernel
, 'k');
292 MOD_PRINT(user
, 'u');
294 exclude_guest_default
= true;
297 if (attr
->precise_ip
) {
300 r
+= scnprintf(bf
+ r
, size
- r
, "%.*s", attr
->precise_ip
, "ppp");
301 exclude_guest_default
= true;
304 if (attr
->exclude_host
|| attr
->exclude_guest
== exclude_guest_default
) {
305 MOD_PRINT(host
, 'H');
306 MOD_PRINT(guest
, 'G');
314 static int perf_evsel__hw_name(struct perf_evsel
*evsel
, char *bf
, size_t size
)
316 int r
= scnprintf(bf
, size
, "%s", __perf_evsel__hw_name(evsel
->attr
.config
));
317 return r
+ perf_evsel__add_modifiers(evsel
, bf
+ r
, size
- r
);
320 const char *perf_evsel__sw_names
[PERF_COUNT_SW_MAX
] = {
333 static const char *__perf_evsel__sw_name(u64 config
)
335 if (config
< PERF_COUNT_SW_MAX
&& perf_evsel__sw_names
[config
])
336 return perf_evsel__sw_names
[config
];
337 return "unknown-software";
340 static int perf_evsel__sw_name(struct perf_evsel
*evsel
, char *bf
, size_t size
)
342 int r
= scnprintf(bf
, size
, "%s", __perf_evsel__sw_name(evsel
->attr
.config
));
343 return r
+ perf_evsel__add_modifiers(evsel
, bf
+ r
, size
- r
);
346 static int __perf_evsel__bp_name(char *bf
, size_t size
, u64 addr
, u64 type
)
350 r
= scnprintf(bf
, size
, "mem:0x%" PRIx64
":", addr
);
352 if (type
& HW_BREAKPOINT_R
)
353 r
+= scnprintf(bf
+ r
, size
- r
, "r");
355 if (type
& HW_BREAKPOINT_W
)
356 r
+= scnprintf(bf
+ r
, size
- r
, "w");
358 if (type
& HW_BREAKPOINT_X
)
359 r
+= scnprintf(bf
+ r
, size
- r
, "x");
364 static int perf_evsel__bp_name(struct perf_evsel
*evsel
, char *bf
, size_t size
)
366 struct perf_event_attr
*attr
= &evsel
->attr
;
367 int r
= __perf_evsel__bp_name(bf
, size
, attr
->bp_addr
, attr
->bp_type
);
368 return r
+ perf_evsel__add_modifiers(evsel
, bf
+ r
, size
- r
);
371 const char *perf_evsel__hw_cache
[PERF_COUNT_HW_CACHE_MAX
]
372 [PERF_EVSEL__MAX_ALIASES
] = {
373 { "L1-dcache", "l1-d", "l1d", "L1-data", },
374 { "L1-icache", "l1-i", "l1i", "L1-instruction", },
376 { "dTLB", "d-tlb", "Data-TLB", },
377 { "iTLB", "i-tlb", "Instruction-TLB", },
378 { "branch", "branches", "bpu", "btb", "bpc", },
382 const char *perf_evsel__hw_cache_op
[PERF_COUNT_HW_CACHE_OP_MAX
]
383 [PERF_EVSEL__MAX_ALIASES
] = {
384 { "load", "loads", "read", },
385 { "store", "stores", "write", },
386 { "prefetch", "prefetches", "speculative-read", "speculative-load", },
389 const char *perf_evsel__hw_cache_result
[PERF_COUNT_HW_CACHE_RESULT_MAX
]
390 [PERF_EVSEL__MAX_ALIASES
] = {
391 { "refs", "Reference", "ops", "access", },
392 { "misses", "miss", },
395 #define C(x) PERF_COUNT_HW_CACHE_##x
396 #define CACHE_READ (1 << C(OP_READ))
397 #define CACHE_WRITE (1 << C(OP_WRITE))
398 #define CACHE_PREFETCH (1 << C(OP_PREFETCH))
399 #define COP(x) (1 << x)
402 * cache operartion stat
403 * L1I : Read and prefetch only
404 * ITLB and BPU : Read-only
406 static unsigned long perf_evsel__hw_cache_stat
[C(MAX
)] = {
407 [C(L1D
)] = (CACHE_READ
| CACHE_WRITE
| CACHE_PREFETCH
),
408 [C(L1I
)] = (CACHE_READ
| CACHE_PREFETCH
),
409 [C(LL
)] = (CACHE_READ
| CACHE_WRITE
| CACHE_PREFETCH
),
410 [C(DTLB
)] = (CACHE_READ
| CACHE_WRITE
| CACHE_PREFETCH
),
411 [C(ITLB
)] = (CACHE_READ
),
412 [C(BPU
)] = (CACHE_READ
),
413 [C(NODE
)] = (CACHE_READ
| CACHE_WRITE
| CACHE_PREFETCH
),
416 bool perf_evsel__is_cache_op_valid(u8 type
, u8 op
)
418 if (perf_evsel__hw_cache_stat
[type
] & COP(op
))
419 return true; /* valid */
421 return false; /* invalid */
424 int __perf_evsel__hw_cache_type_op_res_name(u8 type
, u8 op
, u8 result
,
425 char *bf
, size_t size
)
428 return scnprintf(bf
, size
, "%s-%s-%s", perf_evsel__hw_cache
[type
][0],
429 perf_evsel__hw_cache_op
[op
][0],
430 perf_evsel__hw_cache_result
[result
][0]);
433 return scnprintf(bf
, size
, "%s-%s", perf_evsel__hw_cache
[type
][0],
434 perf_evsel__hw_cache_op
[op
][1]);
437 static int __perf_evsel__hw_cache_name(u64 config
, char *bf
, size_t size
)
439 u8 op
, result
, type
= (config
>> 0) & 0xff;
440 const char *err
= "unknown-ext-hardware-cache-type";
442 if (type
> PERF_COUNT_HW_CACHE_MAX
)
445 op
= (config
>> 8) & 0xff;
446 err
= "unknown-ext-hardware-cache-op";
447 if (op
> PERF_COUNT_HW_CACHE_OP_MAX
)
450 result
= (config
>> 16) & 0xff;
451 err
= "unknown-ext-hardware-cache-result";
452 if (result
> PERF_COUNT_HW_CACHE_RESULT_MAX
)
455 err
= "invalid-cache";
456 if (!perf_evsel__is_cache_op_valid(type
, op
))
459 return __perf_evsel__hw_cache_type_op_res_name(type
, op
, result
, bf
, size
);
461 return scnprintf(bf
, size
, "%s", err
);
464 static int perf_evsel__hw_cache_name(struct perf_evsel
*evsel
, char *bf
, size_t size
)
466 int ret
= __perf_evsel__hw_cache_name(evsel
->attr
.config
, bf
, size
);
467 return ret
+ perf_evsel__add_modifiers(evsel
, bf
+ ret
, size
- ret
);
470 static int perf_evsel__raw_name(struct perf_evsel
*evsel
, char *bf
, size_t size
)
472 int ret
= scnprintf(bf
, size
, "raw 0x%" PRIx64
, evsel
->attr
.config
);
473 return ret
+ perf_evsel__add_modifiers(evsel
, bf
+ ret
, size
- ret
);
476 const char *perf_evsel__name(struct perf_evsel
*evsel
)
483 switch (evsel
->attr
.type
) {
485 perf_evsel__raw_name(evsel
, bf
, sizeof(bf
));
488 case PERF_TYPE_HARDWARE
:
489 perf_evsel__hw_name(evsel
, bf
, sizeof(bf
));
492 case PERF_TYPE_HW_CACHE
:
493 perf_evsel__hw_cache_name(evsel
, bf
, sizeof(bf
));
496 case PERF_TYPE_SOFTWARE
:
497 perf_evsel__sw_name(evsel
, bf
, sizeof(bf
));
500 case PERF_TYPE_TRACEPOINT
:
501 scnprintf(bf
, sizeof(bf
), "%s", "unknown tracepoint");
504 case PERF_TYPE_BREAKPOINT
:
505 perf_evsel__bp_name(evsel
, bf
, sizeof(bf
));
509 scnprintf(bf
, sizeof(bf
), "unknown attr type: %d",
514 evsel
->name
= strdup(bf
);
516 return evsel
->name
?: "unknown";
519 const char *perf_evsel__group_name(struct perf_evsel
*evsel
)
521 return evsel
->group_name
?: "anon group";
524 int perf_evsel__group_desc(struct perf_evsel
*evsel
, char *buf
, size_t size
)
527 struct perf_evsel
*pos
;
528 const char *group_name
= perf_evsel__group_name(evsel
);
530 ret
= scnprintf(buf
, size
, "%s", group_name
);
532 ret
+= scnprintf(buf
+ ret
, size
- ret
, " { %s",
533 perf_evsel__name(evsel
));
535 for_each_group_member(pos
, evsel
)
536 ret
+= scnprintf(buf
+ ret
, size
- ret
, ", %s",
537 perf_evsel__name(pos
));
539 ret
+= scnprintf(buf
+ ret
, size
- ret
, " }");
545 perf_evsel__config_callgraph(struct perf_evsel
*evsel
,
546 struct record_opts
*opts
)
548 bool function
= perf_evsel__is_function_event(evsel
);
549 struct perf_event_attr
*attr
= &evsel
->attr
;
551 perf_evsel__set_sample_bit(evsel
, CALLCHAIN
);
553 if (callchain_param
.record_mode
== CALLCHAIN_LBR
) {
554 if (!opts
->branch_stack
) {
555 if (attr
->exclude_user
) {
556 pr_warning("LBR callstack option is only available "
557 "to get user callchain information. "
558 "Falling back to framepointers.\n");
560 perf_evsel__set_sample_bit(evsel
, BRANCH_STACK
);
561 attr
->branch_sample_type
= PERF_SAMPLE_BRANCH_USER
|
562 PERF_SAMPLE_BRANCH_CALL_STACK
;
565 pr_warning("Cannot use LBR callstack with branch stack. "
566 "Falling back to framepointers.\n");
569 if (callchain_param
.record_mode
== CALLCHAIN_DWARF
) {
571 perf_evsel__set_sample_bit(evsel
, REGS_USER
);
572 perf_evsel__set_sample_bit(evsel
, STACK_USER
);
573 attr
->sample_regs_user
= PERF_REGS_MASK
;
574 attr
->sample_stack_user
= callchain_param
.dump_size
;
575 attr
->exclude_callchain_user
= 1;
577 pr_info("Cannot use DWARF unwind for function trace event,"
578 " falling back to framepointers.\n");
583 pr_info("Disabling user space callchains for function trace event.\n");
584 attr
->exclude_callchain_user
= 1;
589 * The enable_on_exec/disabled value strategy:
591 * 1) For any type of traced program:
592 * - all independent events and group leaders are disabled
593 * - all group members are enabled
595 * Group members are ruled by group leaders. They need to
596 * be enabled, because the group scheduling relies on that.
598 * 2) For traced programs executed by perf:
599 * - all independent events and group leaders have
601 * - we don't specifically enable or disable any event during
604 * Independent events and group leaders are initially disabled
605 * and get enabled by exec. Group members are ruled by group
606 * leaders as stated in 1).
608 * 3) For traced programs attached by perf (pid/tid):
609 * - we specifically enable or disable all events during
612 * When attaching events to already running traced we
613 * enable/disable events specifically, as there's no
614 * initial traced exec call.
616 void perf_evsel__config(struct perf_evsel
*evsel
, struct record_opts
*opts
)
618 struct perf_evsel
*leader
= evsel
->leader
;
619 struct perf_event_attr
*attr
= &evsel
->attr
;
620 int track
= evsel
->tracking
;
621 bool per_cpu
= opts
->target
.default_per_cpu
&& !opts
->target
.per_thread
;
623 attr
->sample_id_all
= perf_missing_features
.sample_id_all
? 0 : 1;
624 attr
->inherit
= !opts
->no_inherit
;
626 perf_evsel__set_sample_bit(evsel
, IP
);
627 perf_evsel__set_sample_bit(evsel
, TID
);
629 if (evsel
->sample_read
) {
630 perf_evsel__set_sample_bit(evsel
, READ
);
633 * We need ID even in case of single event, because
634 * PERF_SAMPLE_READ process ID specific data.
636 perf_evsel__set_sample_id(evsel
, false);
639 * Apply group format only if we belong to group
640 * with more than one members.
642 if (leader
->nr_members
> 1) {
643 attr
->read_format
|= PERF_FORMAT_GROUP
;
649 * We default some events to have a default interval. But keep
650 * it a weak assumption overridable by the user.
652 if (!attr
->sample_period
|| (opts
->user_freq
!= UINT_MAX
||
653 opts
->user_interval
!= ULLONG_MAX
)) {
655 perf_evsel__set_sample_bit(evsel
, PERIOD
);
657 attr
->sample_freq
= opts
->freq
;
659 attr
->sample_period
= opts
->default_interval
;
664 * Disable sampling for all group members other
665 * than leader in case leader 'leads' the sampling.
667 if ((leader
!= evsel
) && leader
->sample_read
) {
668 attr
->sample_freq
= 0;
669 attr
->sample_period
= 0;
672 if (opts
->no_samples
)
673 attr
->sample_freq
= 0;
675 if (opts
->inherit_stat
)
676 attr
->inherit_stat
= 1;
678 if (opts
->sample_address
) {
679 perf_evsel__set_sample_bit(evsel
, ADDR
);
680 attr
->mmap_data
= track
;
684 * We don't allow user space callchains for function trace
685 * event, due to issues with page faults while tracing page
686 * fault handler and its overall trickiness nature.
688 if (perf_evsel__is_function_event(evsel
))
689 evsel
->attr
.exclude_callchain_user
= 1;
691 if (callchain_param
.enabled
&& !evsel
->no_aux_samples
)
692 perf_evsel__config_callgraph(evsel
, opts
);
694 if (opts
->sample_intr_regs
) {
695 attr
->sample_regs_intr
= PERF_REGS_MASK
;
696 perf_evsel__set_sample_bit(evsel
, REGS_INTR
);
699 if (target__has_cpu(&opts
->target
))
700 perf_evsel__set_sample_bit(evsel
, CPU
);
703 perf_evsel__set_sample_bit(evsel
, PERIOD
);
706 * When the user explicitely disabled time don't force it here.
708 if (opts
->sample_time
&&
709 (!perf_missing_features
.sample_id_all
&&
710 (!opts
->no_inherit
|| target__has_cpu(&opts
->target
) || per_cpu
)))
711 perf_evsel__set_sample_bit(evsel
, TIME
);
713 if (opts
->raw_samples
&& !evsel
->no_aux_samples
) {
714 perf_evsel__set_sample_bit(evsel
, TIME
);
715 perf_evsel__set_sample_bit(evsel
, RAW
);
716 perf_evsel__set_sample_bit(evsel
, CPU
);
719 if (opts
->sample_address
)
720 perf_evsel__set_sample_bit(evsel
, DATA_SRC
);
722 if (opts
->no_buffering
) {
724 attr
->wakeup_events
= 1;
726 if (opts
->branch_stack
&& !evsel
->no_aux_samples
) {
727 perf_evsel__set_sample_bit(evsel
, BRANCH_STACK
);
728 attr
->branch_sample_type
= opts
->branch_stack
;
731 if (opts
->sample_weight
)
732 perf_evsel__set_sample_bit(evsel
, WEIGHT
);
736 attr
->mmap2
= track
&& !perf_missing_features
.mmap2
;
739 if (opts
->sample_transaction
)
740 perf_evsel__set_sample_bit(evsel
, TRANSACTION
);
742 if (opts
->running_time
) {
743 evsel
->attr
.read_format
|=
744 PERF_FORMAT_TOTAL_TIME_ENABLED
|
745 PERF_FORMAT_TOTAL_TIME_RUNNING
;
749 * XXX see the function comment above
751 * Disabling only independent events or group leaders,
752 * keeping group members enabled.
754 if (perf_evsel__is_group_leader(evsel
))
758 * Setting enable_on_exec for independent events and
759 * group leaders for traced executed by perf.
761 if (target__none(&opts
->target
) && perf_evsel__is_group_leader(evsel
) &&
762 !opts
->initial_delay
)
763 attr
->enable_on_exec
= 1;
765 if (evsel
->immediate
) {
767 attr
->enable_on_exec
= 0;
770 clockid
= opts
->clockid
;
771 if (opts
->use_clockid
) {
772 attr
->use_clockid
= 1;
773 attr
->clockid
= opts
->clockid
;
777 static int perf_evsel__alloc_fd(struct perf_evsel
*evsel
, int ncpus
, int nthreads
)
781 if (evsel
->system_wide
)
784 evsel
->fd
= xyarray__new(ncpus
, nthreads
, sizeof(int));
787 for (cpu
= 0; cpu
< ncpus
; cpu
++) {
788 for (thread
= 0; thread
< nthreads
; thread
++) {
789 FD(evsel
, cpu
, thread
) = -1;
794 return evsel
->fd
!= NULL
? 0 : -ENOMEM
;
797 static int perf_evsel__run_ioctl(struct perf_evsel
*evsel
, int ncpus
, int nthreads
,
802 if (evsel
->system_wide
)
805 for (cpu
= 0; cpu
< ncpus
; cpu
++) {
806 for (thread
= 0; thread
< nthreads
; thread
++) {
807 int fd
= FD(evsel
, cpu
, thread
),
808 err
= ioctl(fd
, ioc
, arg
);
818 int perf_evsel__set_filter(struct perf_evsel
*evsel
, int ncpus
, int nthreads
,
821 return perf_evsel__run_ioctl(evsel
, ncpus
, nthreads
,
822 PERF_EVENT_IOC_SET_FILTER
,
826 int perf_evsel__enable(struct perf_evsel
*evsel
, int ncpus
, int nthreads
)
828 return perf_evsel__run_ioctl(evsel
, ncpus
, nthreads
,
829 PERF_EVENT_IOC_ENABLE
,
833 int perf_evsel__alloc_id(struct perf_evsel
*evsel
, int ncpus
, int nthreads
)
835 if (ncpus
== 0 || nthreads
== 0)
838 if (evsel
->system_wide
)
841 evsel
->sample_id
= xyarray__new(ncpus
, nthreads
, sizeof(struct perf_sample_id
));
842 if (evsel
->sample_id
== NULL
)
845 evsel
->id
= zalloc(ncpus
* nthreads
* sizeof(u64
));
846 if (evsel
->id
== NULL
) {
847 xyarray__delete(evsel
->sample_id
);
848 evsel
->sample_id
= NULL
;
855 static void perf_evsel__free_fd(struct perf_evsel
*evsel
)
857 xyarray__delete(evsel
->fd
);
861 static void perf_evsel__free_id(struct perf_evsel
*evsel
)
863 xyarray__delete(evsel
->sample_id
);
864 evsel
->sample_id
= NULL
;
868 void perf_evsel__close_fd(struct perf_evsel
*evsel
, int ncpus
, int nthreads
)
872 if (evsel
->system_wide
)
875 for (cpu
= 0; cpu
< ncpus
; cpu
++)
876 for (thread
= 0; thread
< nthreads
; ++thread
) {
877 close(FD(evsel
, cpu
, thread
));
878 FD(evsel
, cpu
, thread
) = -1;
882 void perf_evsel__exit(struct perf_evsel
*evsel
)
884 assert(list_empty(&evsel
->node
));
885 perf_evsel__free_fd(evsel
);
886 perf_evsel__free_id(evsel
);
887 close_cgroup(evsel
->cgrp
);
888 cpu_map__put(evsel
->cpus
);
889 thread_map__put(evsel
->threads
);
890 zfree(&evsel
->group_name
);
892 perf_evsel__object
.fini(evsel
);
895 void perf_evsel__delete(struct perf_evsel
*evsel
)
897 perf_evsel__exit(evsel
);
901 void perf_evsel__compute_deltas(struct perf_evsel
*evsel
, int cpu
, int thread
,
902 struct perf_counts_values
*count
)
904 struct perf_counts_values tmp
;
906 if (!evsel
->prev_raw_counts
)
910 tmp
= evsel
->prev_raw_counts
->aggr
;
911 evsel
->prev_raw_counts
->aggr
= *count
;
913 tmp
= *perf_counts(evsel
->prev_raw_counts
, cpu
, thread
);
914 *perf_counts(evsel
->prev_raw_counts
, cpu
, thread
) = *count
;
917 count
->val
= count
->val
- tmp
.val
;
918 count
->ena
= count
->ena
- tmp
.ena
;
919 count
->run
= count
->run
- tmp
.run
;
922 void perf_counts_values__scale(struct perf_counts_values
*count
,
923 bool scale
, s8
*pscaled
)
928 if (count
->run
== 0) {
931 } else if (count
->run
< count
->ena
) {
933 count
->val
= (u64
)((double) count
->val
* count
->ena
/ count
->run
+ 0.5);
936 count
->ena
= count
->run
= 0;
942 int perf_evsel__read(struct perf_evsel
*evsel
, int cpu
, int thread
,
943 struct perf_counts_values
*count
)
945 memset(count
, 0, sizeof(*count
));
947 if (FD(evsel
, cpu
, thread
) < 0)
950 if (readn(FD(evsel
, cpu
, thread
), count
, sizeof(*count
)) < 0)
956 int __perf_evsel__read_on_cpu(struct perf_evsel
*evsel
,
957 int cpu
, int thread
, bool scale
)
959 struct perf_counts_values count
;
960 size_t nv
= scale
? 3 : 1;
962 if (FD(evsel
, cpu
, thread
) < 0)
965 if (evsel
->counts
== NULL
&& perf_evsel__alloc_counts(evsel
, cpu
+ 1, thread
+ 1) < 0)
968 if (readn(FD(evsel
, cpu
, thread
), &count
, nv
* sizeof(u64
)) < 0)
971 perf_evsel__compute_deltas(evsel
, cpu
, thread
, &count
);
972 perf_counts_values__scale(&count
, scale
, NULL
);
973 *perf_counts(evsel
->counts
, cpu
, thread
) = count
;
977 static int get_group_fd(struct perf_evsel
*evsel
, int cpu
, int thread
)
979 struct perf_evsel
*leader
= evsel
->leader
;
982 if (perf_evsel__is_group_leader(evsel
))
986 * Leader must be already processed/open,
991 fd
= FD(leader
, cpu
, thread
);
1002 static void __p_bits(char *buf
, size_t size
, u64 value
, struct bit_names
*bits
)
1004 bool first_bit
= true;
1008 if (value
& bits
[i
].bit
) {
1009 buf
+= scnprintf(buf
, size
, "%s%s", first_bit
? "" : "|", bits
[i
].name
);
1012 } while (bits
[++i
].name
!= NULL
);
1015 static void __p_sample_type(char *buf
, size_t size
, u64 value
)
1017 #define bit_name(n) { PERF_SAMPLE_##n, #n }
1018 struct bit_names bits
[] = {
1019 bit_name(IP
), bit_name(TID
), bit_name(TIME
), bit_name(ADDR
),
1020 bit_name(READ
), bit_name(CALLCHAIN
), bit_name(ID
), bit_name(CPU
),
1021 bit_name(PERIOD
), bit_name(STREAM_ID
), bit_name(RAW
),
1022 bit_name(BRANCH_STACK
), bit_name(REGS_USER
), bit_name(STACK_USER
),
1023 bit_name(IDENTIFIER
), bit_name(REGS_INTR
),
1027 __p_bits(buf
, size
, value
, bits
);
1030 static void __p_read_format(char *buf
, size_t size
, u64 value
)
1032 #define bit_name(n) { PERF_FORMAT_##n, #n }
1033 struct bit_names bits
[] = {
1034 bit_name(TOTAL_TIME_ENABLED
), bit_name(TOTAL_TIME_RUNNING
),
1035 bit_name(ID
), bit_name(GROUP
),
1039 __p_bits(buf
, size
, value
, bits
);
1042 #define BUF_SIZE 1024
1044 #define p_hex(val) snprintf(buf, BUF_SIZE, "%#"PRIx64, (uint64_t)(val))
1045 #define p_unsigned(val) snprintf(buf, BUF_SIZE, "%"PRIu64, (uint64_t)(val))
1046 #define p_signed(val) snprintf(buf, BUF_SIZE, "%"PRId64, (int64_t)(val))
1047 #define p_sample_type(val) __p_sample_type(buf, BUF_SIZE, val)
1048 #define p_read_format(val) __p_read_format(buf, BUF_SIZE, val)
1050 #define PRINT_ATTRn(_n, _f, _p) \
1054 ret += attr__fprintf(fp, _n, buf, priv);\
1058 #define PRINT_ATTRf(_f, _p) PRINT_ATTRn(#_f, _f, _p)
1060 int perf_event_attr__fprintf(FILE *fp
, struct perf_event_attr
*attr
,
1061 attr__fprintf_f attr__fprintf
, void *priv
)
1066 PRINT_ATTRf(type
, p_unsigned
);
1067 PRINT_ATTRf(size
, p_unsigned
);
1068 PRINT_ATTRf(config
, p_hex
);
1069 PRINT_ATTRn("{ sample_period, sample_freq }", sample_period
, p_unsigned
);
1070 PRINT_ATTRf(sample_type
, p_sample_type
);
1071 PRINT_ATTRf(read_format
, p_read_format
);
1073 PRINT_ATTRf(disabled
, p_unsigned
);
1074 PRINT_ATTRf(inherit
, p_unsigned
);
1075 PRINT_ATTRf(pinned
, p_unsigned
);
1076 PRINT_ATTRf(exclusive
, p_unsigned
);
1077 PRINT_ATTRf(exclude_user
, p_unsigned
);
1078 PRINT_ATTRf(exclude_kernel
, p_unsigned
);
1079 PRINT_ATTRf(exclude_hv
, p_unsigned
);
1080 PRINT_ATTRf(exclude_idle
, p_unsigned
);
1081 PRINT_ATTRf(mmap
, p_unsigned
);
1082 PRINT_ATTRf(comm
, p_unsigned
);
1083 PRINT_ATTRf(freq
, p_unsigned
);
1084 PRINT_ATTRf(inherit_stat
, p_unsigned
);
1085 PRINT_ATTRf(enable_on_exec
, p_unsigned
);
1086 PRINT_ATTRf(task
, p_unsigned
);
1087 PRINT_ATTRf(watermark
, p_unsigned
);
1088 PRINT_ATTRf(precise_ip
, p_unsigned
);
1089 PRINT_ATTRf(mmap_data
, p_unsigned
);
1090 PRINT_ATTRf(sample_id_all
, p_unsigned
);
1091 PRINT_ATTRf(exclude_host
, p_unsigned
);
1092 PRINT_ATTRf(exclude_guest
, p_unsigned
);
1093 PRINT_ATTRf(exclude_callchain_kernel
, p_unsigned
);
1094 PRINT_ATTRf(exclude_callchain_user
, p_unsigned
);
1095 PRINT_ATTRf(mmap2
, p_unsigned
);
1096 PRINT_ATTRf(comm_exec
, p_unsigned
);
1097 PRINT_ATTRf(use_clockid
, p_unsigned
);
1099 PRINT_ATTRn("{ wakeup_events, wakeup_watermark }", wakeup_events
, p_unsigned
);
1100 PRINT_ATTRf(bp_type
, p_unsigned
);
1101 PRINT_ATTRn("{ bp_addr, config1 }", bp_addr
, p_hex
);
1102 PRINT_ATTRn("{ bp_len, config2 }", bp_len
, p_hex
);
1103 PRINT_ATTRf(sample_regs_user
, p_hex
);
1104 PRINT_ATTRf(sample_stack_user
, p_unsigned
);
1105 PRINT_ATTRf(clockid
, p_signed
);
1106 PRINT_ATTRf(sample_regs_intr
, p_hex
);
1107 PRINT_ATTRf(aux_watermark
, p_unsigned
);
1112 static int __open_attr__fprintf(FILE *fp
, const char *name
, const char *val
,
1113 void *priv
__attribute__((unused
)))
1115 return fprintf(fp
, " %-32s %s\n", name
, val
);
1118 static int __perf_evsel__open(struct perf_evsel
*evsel
, struct cpu_map
*cpus
,
1119 struct thread_map
*threads
)
1121 int cpu
, thread
, nthreads
;
1122 unsigned long flags
= PERF_FLAG_FD_CLOEXEC
;
1124 enum { NO_CHANGE
, SET_TO_MAX
, INCREASED_MAX
} set_rlimit
= NO_CHANGE
;
1126 if (evsel
->system_wide
)
1129 nthreads
= threads
->nr
;
1131 if (evsel
->fd
== NULL
&&
1132 perf_evsel__alloc_fd(evsel
, cpus
->nr
, nthreads
) < 0)
1136 flags
|= PERF_FLAG_PID_CGROUP
;
1137 pid
= evsel
->cgrp
->fd
;
1140 fallback_missing_features
:
1141 if (perf_missing_features
.clockid_wrong
)
1142 evsel
->attr
.clockid
= CLOCK_MONOTONIC
; /* should always work */
1143 if (perf_missing_features
.clockid
) {
1144 evsel
->attr
.use_clockid
= 0;
1145 evsel
->attr
.clockid
= 0;
1147 if (perf_missing_features
.cloexec
)
1148 flags
&= ~(unsigned long)PERF_FLAG_FD_CLOEXEC
;
1149 if (perf_missing_features
.mmap2
)
1150 evsel
->attr
.mmap2
= 0;
1151 if (perf_missing_features
.exclude_guest
)
1152 evsel
->attr
.exclude_guest
= evsel
->attr
.exclude_host
= 0;
1154 if (perf_missing_features
.sample_id_all
)
1155 evsel
->attr
.sample_id_all
= 0;
1158 fprintf(stderr
, "%.60s\n", graph_dotted_line
);
1159 fprintf(stderr
, "perf_event_attr:\n");
1160 perf_event_attr__fprintf(stderr
, &evsel
->attr
, __open_attr__fprintf
, NULL
);
1161 fprintf(stderr
, "%.60s\n", graph_dotted_line
);
1164 for (cpu
= 0; cpu
< cpus
->nr
; cpu
++) {
1166 for (thread
= 0; thread
< nthreads
; thread
++) {
1169 if (!evsel
->cgrp
&& !evsel
->system_wide
)
1170 pid
= thread_map__pid(threads
, thread
);
1172 group_fd
= get_group_fd(evsel
, cpu
, thread
);
1174 pr_debug2("sys_perf_event_open: pid %d cpu %d group_fd %d flags %#lx\n",
1175 pid
, cpus
->map
[cpu
], group_fd
, flags
);
1177 FD(evsel
, cpu
, thread
) = sys_perf_event_open(&evsel
->attr
,
1181 if (FD(evsel
, cpu
, thread
) < 0) {
1183 pr_debug2("sys_perf_event_open failed, error %d\n",
1187 set_rlimit
= NO_CHANGE
;
1190 * If we succeeded but had to kill clockid, fail and
1191 * have perf_evsel__open_strerror() print us a nice
1194 if (perf_missing_features
.clockid
||
1195 perf_missing_features
.clockid_wrong
) {
1206 * perf stat needs between 5 and 22 fds per CPU. When we run out
1207 * of them try to increase the limits.
1209 if (err
== -EMFILE
&& set_rlimit
< INCREASED_MAX
) {
1211 int old_errno
= errno
;
1213 if (getrlimit(RLIMIT_NOFILE
, &l
) == 0) {
1214 if (set_rlimit
== NO_CHANGE
)
1215 l
.rlim_cur
= l
.rlim_max
;
1217 l
.rlim_cur
= l
.rlim_max
+ 1000;
1218 l
.rlim_max
= l
.rlim_cur
;
1220 if (setrlimit(RLIMIT_NOFILE
, &l
) == 0) {
1229 if (err
!= -EINVAL
|| cpu
> 0 || thread
> 0)
1233 * Must probe features in the order they were added to the
1234 * perf_event_attr interface.
1236 if (!perf_missing_features
.clockid_wrong
&& evsel
->attr
.use_clockid
) {
1237 perf_missing_features
.clockid_wrong
= true;
1238 goto fallback_missing_features
;
1239 } else if (!perf_missing_features
.clockid
&& evsel
->attr
.use_clockid
) {
1240 perf_missing_features
.clockid
= true;
1241 goto fallback_missing_features
;
1242 } else if (!perf_missing_features
.cloexec
&& (flags
& PERF_FLAG_FD_CLOEXEC
)) {
1243 perf_missing_features
.cloexec
= true;
1244 goto fallback_missing_features
;
1245 } else if (!perf_missing_features
.mmap2
&& evsel
->attr
.mmap2
) {
1246 perf_missing_features
.mmap2
= true;
1247 goto fallback_missing_features
;
1248 } else if (!perf_missing_features
.exclude_guest
&&
1249 (evsel
->attr
.exclude_guest
|| evsel
->attr
.exclude_host
)) {
1250 perf_missing_features
.exclude_guest
= true;
1251 goto fallback_missing_features
;
1252 } else if (!perf_missing_features
.sample_id_all
) {
1253 perf_missing_features
.sample_id_all
= true;
1254 goto retry_sample_id
;
1259 while (--thread
>= 0) {
1260 close(FD(evsel
, cpu
, thread
));
1261 FD(evsel
, cpu
, thread
) = -1;
1264 } while (--cpu
>= 0);
1268 void perf_evsel__close(struct perf_evsel
*evsel
, int ncpus
, int nthreads
)
1270 if (evsel
->fd
== NULL
)
1273 perf_evsel__close_fd(evsel
, ncpus
, nthreads
);
1274 perf_evsel__free_fd(evsel
);
1286 struct thread_map map
;
1288 } empty_thread_map
= {
1293 int perf_evsel__open(struct perf_evsel
*evsel
, struct cpu_map
*cpus
,
1294 struct thread_map
*threads
)
1297 /* Work around old compiler warnings about strict aliasing */
1298 cpus
= &empty_cpu_map
.map
;
1301 if (threads
== NULL
)
1302 threads
= &empty_thread_map
.map
;
1304 return __perf_evsel__open(evsel
, cpus
, threads
);
1307 int perf_evsel__open_per_cpu(struct perf_evsel
*evsel
,
1308 struct cpu_map
*cpus
)
1310 return __perf_evsel__open(evsel
, cpus
, &empty_thread_map
.map
);
1313 int perf_evsel__open_per_thread(struct perf_evsel
*evsel
,
1314 struct thread_map
*threads
)
1316 return __perf_evsel__open(evsel
, &empty_cpu_map
.map
, threads
);
1319 static int perf_evsel__parse_id_sample(const struct perf_evsel
*evsel
,
1320 const union perf_event
*event
,
1321 struct perf_sample
*sample
)
1323 u64 type
= evsel
->attr
.sample_type
;
1324 const u64
*array
= event
->sample
.array
;
1325 bool swapped
= evsel
->needs_swap
;
1328 array
+= ((event
->header
.size
-
1329 sizeof(event
->header
)) / sizeof(u64
)) - 1;
1331 if (type
& PERF_SAMPLE_IDENTIFIER
) {
1332 sample
->id
= *array
;
1336 if (type
& PERF_SAMPLE_CPU
) {
1339 /* undo swap of u64, then swap on individual u32s */
1340 u
.val64
= bswap_64(u
.val64
);
1341 u
.val32
[0] = bswap_32(u
.val32
[0]);
1344 sample
->cpu
= u
.val32
[0];
1348 if (type
& PERF_SAMPLE_STREAM_ID
) {
1349 sample
->stream_id
= *array
;
1353 if (type
& PERF_SAMPLE_ID
) {
1354 sample
->id
= *array
;
1358 if (type
& PERF_SAMPLE_TIME
) {
1359 sample
->time
= *array
;
1363 if (type
& PERF_SAMPLE_TID
) {
1366 /* undo swap of u64, then swap on individual u32s */
1367 u
.val64
= bswap_64(u
.val64
);
1368 u
.val32
[0] = bswap_32(u
.val32
[0]);
1369 u
.val32
[1] = bswap_32(u
.val32
[1]);
1372 sample
->pid
= u
.val32
[0];
1373 sample
->tid
= u
.val32
[1];
1380 static inline bool overflow(const void *endp
, u16 max_size
, const void *offset
,
1383 return size
> max_size
|| offset
+ size
> endp
;
1386 #define OVERFLOW_CHECK(offset, size, max_size) \
1388 if (overflow(endp, (max_size), (offset), (size))) \
1392 #define OVERFLOW_CHECK_u64(offset) \
1393 OVERFLOW_CHECK(offset, sizeof(u64), sizeof(u64))
1395 int perf_evsel__parse_sample(struct perf_evsel
*evsel
, union perf_event
*event
,
1396 struct perf_sample
*data
)
1398 u64 type
= evsel
->attr
.sample_type
;
1399 bool swapped
= evsel
->needs_swap
;
1401 u16 max_size
= event
->header
.size
;
1402 const void *endp
= (void *)event
+ max_size
;
1406 * used for cross-endian analysis. See git commit 65014ab3
1407 * for why this goofiness is needed.
1411 memset(data
, 0, sizeof(*data
));
1412 data
->cpu
= data
->pid
= data
->tid
= -1;
1413 data
->stream_id
= data
->id
= data
->time
= -1ULL;
1414 data
->period
= evsel
->attr
.sample_period
;
1417 if (event
->header
.type
!= PERF_RECORD_SAMPLE
) {
1418 if (!evsel
->attr
.sample_id_all
)
1420 return perf_evsel__parse_id_sample(evsel
, event
, data
);
1423 array
= event
->sample
.array
;
1426 * The evsel's sample_size is based on PERF_SAMPLE_MASK which includes
1427 * up to PERF_SAMPLE_PERIOD. After that overflow() must be used to
1428 * check the format does not go past the end of the event.
1430 if (evsel
->sample_size
+ sizeof(event
->header
) > event
->header
.size
)
1434 if (type
& PERF_SAMPLE_IDENTIFIER
) {
1439 if (type
& PERF_SAMPLE_IP
) {
1444 if (type
& PERF_SAMPLE_TID
) {
1447 /* undo swap of u64, then swap on individual u32s */
1448 u
.val64
= bswap_64(u
.val64
);
1449 u
.val32
[0] = bswap_32(u
.val32
[0]);
1450 u
.val32
[1] = bswap_32(u
.val32
[1]);
1453 data
->pid
= u
.val32
[0];
1454 data
->tid
= u
.val32
[1];
1458 if (type
& PERF_SAMPLE_TIME
) {
1459 data
->time
= *array
;
1464 if (type
& PERF_SAMPLE_ADDR
) {
1465 data
->addr
= *array
;
1469 if (type
& PERF_SAMPLE_ID
) {
1474 if (type
& PERF_SAMPLE_STREAM_ID
) {
1475 data
->stream_id
= *array
;
1479 if (type
& PERF_SAMPLE_CPU
) {
1483 /* undo swap of u64, then swap on individual u32s */
1484 u
.val64
= bswap_64(u
.val64
);
1485 u
.val32
[0] = bswap_32(u
.val32
[0]);
1488 data
->cpu
= u
.val32
[0];
1492 if (type
& PERF_SAMPLE_PERIOD
) {
1493 data
->period
= *array
;
1497 if (type
& PERF_SAMPLE_READ
) {
1498 u64 read_format
= evsel
->attr
.read_format
;
1500 OVERFLOW_CHECK_u64(array
);
1501 if (read_format
& PERF_FORMAT_GROUP
)
1502 data
->read
.group
.nr
= *array
;
1504 data
->read
.one
.value
= *array
;
1508 if (read_format
& PERF_FORMAT_TOTAL_TIME_ENABLED
) {
1509 OVERFLOW_CHECK_u64(array
);
1510 data
->read
.time_enabled
= *array
;
1514 if (read_format
& PERF_FORMAT_TOTAL_TIME_RUNNING
) {
1515 OVERFLOW_CHECK_u64(array
);
1516 data
->read
.time_running
= *array
;
1520 /* PERF_FORMAT_ID is forced for PERF_SAMPLE_READ */
1521 if (read_format
& PERF_FORMAT_GROUP
) {
1522 const u64 max_group_nr
= UINT64_MAX
/
1523 sizeof(struct sample_read_value
);
1525 if (data
->read
.group
.nr
> max_group_nr
)
1527 sz
= data
->read
.group
.nr
*
1528 sizeof(struct sample_read_value
);
1529 OVERFLOW_CHECK(array
, sz
, max_size
);
1530 data
->read
.group
.values
=
1531 (struct sample_read_value
*)array
;
1532 array
= (void *)array
+ sz
;
1534 OVERFLOW_CHECK_u64(array
);
1535 data
->read
.one
.id
= *array
;
1540 if (type
& PERF_SAMPLE_CALLCHAIN
) {
1541 const u64 max_callchain_nr
= UINT64_MAX
/ sizeof(u64
);
1543 OVERFLOW_CHECK_u64(array
);
1544 data
->callchain
= (struct ip_callchain
*)array
++;
1545 if (data
->callchain
->nr
> max_callchain_nr
)
1547 sz
= data
->callchain
->nr
* sizeof(u64
);
1548 OVERFLOW_CHECK(array
, sz
, max_size
);
1549 array
= (void *)array
+ sz
;
1552 if (type
& PERF_SAMPLE_RAW
) {
1553 OVERFLOW_CHECK_u64(array
);
1555 if (WARN_ONCE(swapped
,
1556 "Endianness of raw data not corrected!\n")) {
1557 /* undo swap of u64, then swap on individual u32s */
1558 u
.val64
= bswap_64(u
.val64
);
1559 u
.val32
[0] = bswap_32(u
.val32
[0]);
1560 u
.val32
[1] = bswap_32(u
.val32
[1]);
1562 data
->raw_size
= u
.val32
[0];
1563 array
= (void *)array
+ sizeof(u32
);
1565 OVERFLOW_CHECK(array
, data
->raw_size
, max_size
);
1566 data
->raw_data
= (void *)array
;
1567 array
= (void *)array
+ data
->raw_size
;
1570 if (type
& PERF_SAMPLE_BRANCH_STACK
) {
1571 const u64 max_branch_nr
= UINT64_MAX
/
1572 sizeof(struct branch_entry
);
1574 OVERFLOW_CHECK_u64(array
);
1575 data
->branch_stack
= (struct branch_stack
*)array
++;
1577 if (data
->branch_stack
->nr
> max_branch_nr
)
1579 sz
= data
->branch_stack
->nr
* sizeof(struct branch_entry
);
1580 OVERFLOW_CHECK(array
, sz
, max_size
);
1581 array
= (void *)array
+ sz
;
1584 if (type
& PERF_SAMPLE_REGS_USER
) {
1585 OVERFLOW_CHECK_u64(array
);
1586 data
->user_regs
.abi
= *array
;
1589 if (data
->user_regs
.abi
) {
1590 u64 mask
= evsel
->attr
.sample_regs_user
;
1592 sz
= hweight_long(mask
) * sizeof(u64
);
1593 OVERFLOW_CHECK(array
, sz
, max_size
);
1594 data
->user_regs
.mask
= mask
;
1595 data
->user_regs
.regs
= (u64
*)array
;
1596 array
= (void *)array
+ sz
;
1600 if (type
& PERF_SAMPLE_STACK_USER
) {
1601 OVERFLOW_CHECK_u64(array
);
1604 data
->user_stack
.offset
= ((char *)(array
- 1)
1608 data
->user_stack
.size
= 0;
1610 OVERFLOW_CHECK(array
, sz
, max_size
);
1611 data
->user_stack
.data
= (char *)array
;
1612 array
= (void *)array
+ sz
;
1613 OVERFLOW_CHECK_u64(array
);
1614 data
->user_stack
.size
= *array
++;
1615 if (WARN_ONCE(data
->user_stack
.size
> sz
,
1616 "user stack dump failure\n"))
1622 if (type
& PERF_SAMPLE_WEIGHT
) {
1623 OVERFLOW_CHECK_u64(array
);
1624 data
->weight
= *array
;
1628 data
->data_src
= PERF_MEM_DATA_SRC_NONE
;
1629 if (type
& PERF_SAMPLE_DATA_SRC
) {
1630 OVERFLOW_CHECK_u64(array
);
1631 data
->data_src
= *array
;
1635 data
->transaction
= 0;
1636 if (type
& PERF_SAMPLE_TRANSACTION
) {
1637 OVERFLOW_CHECK_u64(array
);
1638 data
->transaction
= *array
;
1642 data
->intr_regs
.abi
= PERF_SAMPLE_REGS_ABI_NONE
;
1643 if (type
& PERF_SAMPLE_REGS_INTR
) {
1644 OVERFLOW_CHECK_u64(array
);
1645 data
->intr_regs
.abi
= *array
;
1648 if (data
->intr_regs
.abi
!= PERF_SAMPLE_REGS_ABI_NONE
) {
1649 u64 mask
= evsel
->attr
.sample_regs_intr
;
1651 sz
= hweight_long(mask
) * sizeof(u64
);
1652 OVERFLOW_CHECK(array
, sz
, max_size
);
1653 data
->intr_regs
.mask
= mask
;
1654 data
->intr_regs
.regs
= (u64
*)array
;
1655 array
= (void *)array
+ sz
;
1662 size_t perf_event__sample_event_size(const struct perf_sample
*sample
, u64 type
,
1665 size_t sz
, result
= sizeof(struct sample_event
);
1667 if (type
& PERF_SAMPLE_IDENTIFIER
)
1668 result
+= sizeof(u64
);
1670 if (type
& PERF_SAMPLE_IP
)
1671 result
+= sizeof(u64
);
1673 if (type
& PERF_SAMPLE_TID
)
1674 result
+= sizeof(u64
);
1676 if (type
& PERF_SAMPLE_TIME
)
1677 result
+= sizeof(u64
);
1679 if (type
& PERF_SAMPLE_ADDR
)
1680 result
+= sizeof(u64
);
1682 if (type
& PERF_SAMPLE_ID
)
1683 result
+= sizeof(u64
);
1685 if (type
& PERF_SAMPLE_STREAM_ID
)
1686 result
+= sizeof(u64
);
1688 if (type
& PERF_SAMPLE_CPU
)
1689 result
+= sizeof(u64
);
1691 if (type
& PERF_SAMPLE_PERIOD
)
1692 result
+= sizeof(u64
);
1694 if (type
& PERF_SAMPLE_READ
) {
1695 result
+= sizeof(u64
);
1696 if (read_format
& PERF_FORMAT_TOTAL_TIME_ENABLED
)
1697 result
+= sizeof(u64
);
1698 if (read_format
& PERF_FORMAT_TOTAL_TIME_RUNNING
)
1699 result
+= sizeof(u64
);
1700 /* PERF_FORMAT_ID is forced for PERF_SAMPLE_READ */
1701 if (read_format
& PERF_FORMAT_GROUP
) {
1702 sz
= sample
->read
.group
.nr
*
1703 sizeof(struct sample_read_value
);
1706 result
+= sizeof(u64
);
1710 if (type
& PERF_SAMPLE_CALLCHAIN
) {
1711 sz
= (sample
->callchain
->nr
+ 1) * sizeof(u64
);
1715 if (type
& PERF_SAMPLE_RAW
) {
1716 result
+= sizeof(u32
);
1717 result
+= sample
->raw_size
;
1720 if (type
& PERF_SAMPLE_BRANCH_STACK
) {
1721 sz
= sample
->branch_stack
->nr
* sizeof(struct branch_entry
);
1726 if (type
& PERF_SAMPLE_REGS_USER
) {
1727 if (sample
->user_regs
.abi
) {
1728 result
+= sizeof(u64
);
1729 sz
= hweight_long(sample
->user_regs
.mask
) * sizeof(u64
);
1732 result
+= sizeof(u64
);
1736 if (type
& PERF_SAMPLE_STACK_USER
) {
1737 sz
= sample
->user_stack
.size
;
1738 result
+= sizeof(u64
);
1741 result
+= sizeof(u64
);
1745 if (type
& PERF_SAMPLE_WEIGHT
)
1746 result
+= sizeof(u64
);
1748 if (type
& PERF_SAMPLE_DATA_SRC
)
1749 result
+= sizeof(u64
);
1751 if (type
& PERF_SAMPLE_TRANSACTION
)
1752 result
+= sizeof(u64
);
1754 if (type
& PERF_SAMPLE_REGS_INTR
) {
1755 if (sample
->intr_regs
.abi
) {
1756 result
+= sizeof(u64
);
1757 sz
= hweight_long(sample
->intr_regs
.mask
) * sizeof(u64
);
1760 result
+= sizeof(u64
);
1767 int perf_event__synthesize_sample(union perf_event
*event
, u64 type
,
1769 const struct perf_sample
*sample
,
1775 * used for cross-endian analysis. See git commit 65014ab3
1776 * for why this goofiness is needed.
1780 array
= event
->sample
.array
;
1782 if (type
& PERF_SAMPLE_IDENTIFIER
) {
1783 *array
= sample
->id
;
1787 if (type
& PERF_SAMPLE_IP
) {
1788 *array
= sample
->ip
;
1792 if (type
& PERF_SAMPLE_TID
) {
1793 u
.val32
[0] = sample
->pid
;
1794 u
.val32
[1] = sample
->tid
;
1797 * Inverse of what is done in perf_evsel__parse_sample
1799 u
.val32
[0] = bswap_32(u
.val32
[0]);
1800 u
.val32
[1] = bswap_32(u
.val32
[1]);
1801 u
.val64
= bswap_64(u
.val64
);
1808 if (type
& PERF_SAMPLE_TIME
) {
1809 *array
= sample
->time
;
1813 if (type
& PERF_SAMPLE_ADDR
) {
1814 *array
= sample
->addr
;
1818 if (type
& PERF_SAMPLE_ID
) {
1819 *array
= sample
->id
;
1823 if (type
& PERF_SAMPLE_STREAM_ID
) {
1824 *array
= sample
->stream_id
;
1828 if (type
& PERF_SAMPLE_CPU
) {
1829 u
.val32
[0] = sample
->cpu
;
1832 * Inverse of what is done in perf_evsel__parse_sample
1834 u
.val32
[0] = bswap_32(u
.val32
[0]);
1835 u
.val64
= bswap_64(u
.val64
);
1841 if (type
& PERF_SAMPLE_PERIOD
) {
1842 *array
= sample
->period
;
1846 if (type
& PERF_SAMPLE_READ
) {
1847 if (read_format
& PERF_FORMAT_GROUP
)
1848 *array
= sample
->read
.group
.nr
;
1850 *array
= sample
->read
.one
.value
;
1853 if (read_format
& PERF_FORMAT_TOTAL_TIME_ENABLED
) {
1854 *array
= sample
->read
.time_enabled
;
1858 if (read_format
& PERF_FORMAT_TOTAL_TIME_RUNNING
) {
1859 *array
= sample
->read
.time_running
;
1863 /* PERF_FORMAT_ID is forced for PERF_SAMPLE_READ */
1864 if (read_format
& PERF_FORMAT_GROUP
) {
1865 sz
= sample
->read
.group
.nr
*
1866 sizeof(struct sample_read_value
);
1867 memcpy(array
, sample
->read
.group
.values
, sz
);
1868 array
= (void *)array
+ sz
;
1870 *array
= sample
->read
.one
.id
;
1875 if (type
& PERF_SAMPLE_CALLCHAIN
) {
1876 sz
= (sample
->callchain
->nr
+ 1) * sizeof(u64
);
1877 memcpy(array
, sample
->callchain
, sz
);
1878 array
= (void *)array
+ sz
;
1881 if (type
& PERF_SAMPLE_RAW
) {
1882 u
.val32
[0] = sample
->raw_size
;
1883 if (WARN_ONCE(swapped
,
1884 "Endianness of raw data not corrected!\n")) {
1886 * Inverse of what is done in perf_evsel__parse_sample
1888 u
.val32
[0] = bswap_32(u
.val32
[0]);
1889 u
.val32
[1] = bswap_32(u
.val32
[1]);
1890 u
.val64
= bswap_64(u
.val64
);
1893 array
= (void *)array
+ sizeof(u32
);
1895 memcpy(array
, sample
->raw_data
, sample
->raw_size
);
1896 array
= (void *)array
+ sample
->raw_size
;
1899 if (type
& PERF_SAMPLE_BRANCH_STACK
) {
1900 sz
= sample
->branch_stack
->nr
* sizeof(struct branch_entry
);
1902 memcpy(array
, sample
->branch_stack
, sz
);
1903 array
= (void *)array
+ sz
;
1906 if (type
& PERF_SAMPLE_REGS_USER
) {
1907 if (sample
->user_regs
.abi
) {
1908 *array
++ = sample
->user_regs
.abi
;
1909 sz
= hweight_long(sample
->user_regs
.mask
) * sizeof(u64
);
1910 memcpy(array
, sample
->user_regs
.regs
, sz
);
1911 array
= (void *)array
+ sz
;
1917 if (type
& PERF_SAMPLE_STACK_USER
) {
1918 sz
= sample
->user_stack
.size
;
1921 memcpy(array
, sample
->user_stack
.data
, sz
);
1922 array
= (void *)array
+ sz
;
1927 if (type
& PERF_SAMPLE_WEIGHT
) {
1928 *array
= sample
->weight
;
1932 if (type
& PERF_SAMPLE_DATA_SRC
) {
1933 *array
= sample
->data_src
;
1937 if (type
& PERF_SAMPLE_TRANSACTION
) {
1938 *array
= sample
->transaction
;
1942 if (type
& PERF_SAMPLE_REGS_INTR
) {
1943 if (sample
->intr_regs
.abi
) {
1944 *array
++ = sample
->intr_regs
.abi
;
1945 sz
= hweight_long(sample
->intr_regs
.mask
) * sizeof(u64
);
1946 memcpy(array
, sample
->intr_regs
.regs
, sz
);
1947 array
= (void *)array
+ sz
;
1956 struct format_field
*perf_evsel__field(struct perf_evsel
*evsel
, const char *name
)
1958 return pevent_find_field(evsel
->tp_format
, name
);
1961 void *perf_evsel__rawptr(struct perf_evsel
*evsel
, struct perf_sample
*sample
,
1964 struct format_field
*field
= perf_evsel__field(evsel
, name
);
1970 offset
= field
->offset
;
1972 if (field
->flags
& FIELD_IS_DYNAMIC
) {
1973 offset
= *(int *)(sample
->raw_data
+ field
->offset
);
1977 return sample
->raw_data
+ offset
;
1980 u64
perf_evsel__intval(struct perf_evsel
*evsel
, struct perf_sample
*sample
,
1983 struct format_field
*field
= perf_evsel__field(evsel
, name
);
1990 ptr
= sample
->raw_data
+ field
->offset
;
1992 switch (field
->size
) {
1996 value
= *(u16
*)ptr
;
1999 value
= *(u32
*)ptr
;
2002 memcpy(&value
, ptr
, sizeof(u64
));
2008 if (!evsel
->needs_swap
)
2011 switch (field
->size
) {
2013 return bswap_16(value
);
2015 return bswap_32(value
);
2017 return bswap_64(value
);
2025 static int comma_fprintf(FILE *fp
, bool *first
, const char *fmt
, ...)
2031 ret
+= fprintf(fp
, ",");
2033 ret
+= fprintf(fp
, ":");
2037 va_start(args
, fmt
);
2038 ret
+= vfprintf(fp
, fmt
, args
);
2043 static int __print_attr__fprintf(FILE *fp
, const char *name
, const char *val
, void *priv
)
2045 return comma_fprintf(fp
, (bool *)priv
, " %s: %s", name
, val
);
2048 int perf_evsel__fprintf(struct perf_evsel
*evsel
,
2049 struct perf_attr_details
*details
, FILE *fp
)
2054 if (details
->event_group
) {
2055 struct perf_evsel
*pos
;
2057 if (!perf_evsel__is_group_leader(evsel
))
2060 if (evsel
->nr_members
> 1)
2061 printed
+= fprintf(fp
, "%s{", evsel
->group_name
?: "");
2063 printed
+= fprintf(fp
, "%s", perf_evsel__name(evsel
));
2064 for_each_group_member(pos
, evsel
)
2065 printed
+= fprintf(fp
, ",%s", perf_evsel__name(pos
));
2067 if (evsel
->nr_members
> 1)
2068 printed
+= fprintf(fp
, "}");
2072 printed
+= fprintf(fp
, "%s", perf_evsel__name(evsel
));
2074 if (details
->verbose
) {
2075 printed
+= perf_event_attr__fprintf(fp
, &evsel
->attr
,
2076 __print_attr__fprintf
, &first
);
2077 } else if (details
->freq
) {
2078 printed
+= comma_fprintf(fp
, &first
, " sample_freq=%" PRIu64
,
2079 (u64
)evsel
->attr
.sample_freq
);
2086 bool perf_evsel__fallback(struct perf_evsel
*evsel
, int err
,
2087 char *msg
, size_t msgsize
)
2089 if ((err
== ENOENT
|| err
== ENXIO
|| err
== ENODEV
) &&
2090 evsel
->attr
.type
== PERF_TYPE_HARDWARE
&&
2091 evsel
->attr
.config
== PERF_COUNT_HW_CPU_CYCLES
) {
2093 * If it's cycles then fall back to hrtimer based
2094 * cpu-clock-tick sw counter, which is always available even if
2097 * PPC returns ENXIO until 2.6.37 (behavior changed with commit
2100 scnprintf(msg
, msgsize
, "%s",
2101 "The cycles event is not supported, trying to fall back to cpu-clock-ticks");
2103 evsel
->attr
.type
= PERF_TYPE_SOFTWARE
;
2104 evsel
->attr
.config
= PERF_COUNT_SW_CPU_CLOCK
;
2106 zfree(&evsel
->name
);
2113 int perf_evsel__open_strerror(struct perf_evsel
*evsel
, struct target
*target
,
2114 int err
, char *msg
, size_t size
)
2116 char sbuf
[STRERR_BUFSIZE
];
2121 return scnprintf(msg
, size
,
2122 "You may not have permission to collect %sstats.\n"
2123 "Consider tweaking /proc/sys/kernel/perf_event_paranoid:\n"
2124 " -1 - Not paranoid at all\n"
2125 " 0 - Disallow raw tracepoint access for unpriv\n"
2126 " 1 - Disallow cpu events for unpriv\n"
2127 " 2 - Disallow kernel profiling for unpriv",
2128 target
->system_wide
? "system-wide " : "");
2130 return scnprintf(msg
, size
, "The %s event is not supported.",
2131 perf_evsel__name(evsel
));
2133 return scnprintf(msg
, size
, "%s",
2134 "Too many events are opened.\n"
2135 "Probably the maximum number of open file descriptors has been reached.\n"
2136 "Hint: Try again after reducing the number of events.\n"
2137 "Hint: Try increasing the limit with 'ulimit -n <limit>'");
2139 if (target
->cpu_list
)
2140 return scnprintf(msg
, size
, "%s",
2141 "No such device - did you specify an out-of-range profile CPU?\n");
2144 if (evsel
->attr
.precise_ip
)
2145 return scnprintf(msg
, size
, "%s",
2146 "\'precise\' request may not be supported. Try removing 'p' modifier.");
2147 #if defined(__i386__) || defined(__x86_64__)
2148 if (evsel
->attr
.type
== PERF_TYPE_HARDWARE
)
2149 return scnprintf(msg
, size
, "%s",
2150 "No hardware sampling interrupt available.\n"
2151 "No APIC? If so then you can boot the kernel with the \"lapic\" boot parameter to force-enable it.");
2155 if (find_process("oprofiled"))
2156 return scnprintf(msg
, size
,
2157 "The PMU counters are busy/taken by another profiler.\n"
2158 "We found oprofile daemon running, please stop it and try again.");
2161 if (perf_missing_features
.clockid
)
2162 return scnprintf(msg
, size
, "clockid feature not supported.");
2163 if (perf_missing_features
.clockid_wrong
)
2164 return scnprintf(msg
, size
, "wrong clockid (%d).", clockid
);
2170 return scnprintf(msg
, size
,
2171 "The sys_perf_event_open() syscall returned with %d (%s) for event (%s).\n"
2172 "/bin/dmesg may provide additional information.\n"
2173 "No CONFIG_PERF_EVENTS=y kernel support configured?\n",
2174 err
, strerror_r(err
, sbuf
, sizeof(sbuf
)),
2175 perf_evsel__name(evsel
));