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)
13 #include <linux/bitops.h>
14 #include <api/fs/fs.h>
15 #include <api/fs/tracing_path.h>
16 #include <traceevent/event-parse.h>
17 #include <linux/hw_breakpoint.h>
18 #include <linux/perf_event.h>
19 #include <linux/compiler.h>
20 #include <linux/err.h>
21 #include <sys/ioctl.h>
22 #include <sys/resource.h>
23 #include <sys/types.h>
26 #include "callchain.h"
33 #include "thread_map.h"
35 #include "perf_regs.h"
37 #include "trace-event.h"
39 #include "util/parse-branch-options.h"
41 #include "sane_ctype.h"
52 } perf_missing_features
;
54 static clockid_t clockid
;
56 static int perf_evsel__no_extra_init(struct perf_evsel
*evsel __maybe_unused
)
61 static void perf_evsel__no_extra_fini(struct perf_evsel
*evsel __maybe_unused
)
67 int (*init
)(struct perf_evsel
*evsel
);
68 void (*fini
)(struct perf_evsel
*evsel
);
69 } perf_evsel__object
= {
70 .size
= sizeof(struct perf_evsel
),
71 .init
= perf_evsel__no_extra_init
,
72 .fini
= perf_evsel__no_extra_fini
,
75 int perf_evsel__object_config(size_t object_size
,
76 int (*init
)(struct perf_evsel
*evsel
),
77 void (*fini
)(struct perf_evsel
*evsel
))
83 if (perf_evsel__object
.size
> object_size
)
86 perf_evsel__object
.size
= object_size
;
90 perf_evsel__object
.init
= init
;
93 perf_evsel__object
.fini
= fini
;
98 #define FD(e, x, y) (*(int *)xyarray__entry(e->fd, x, y))
100 int __perf_evsel__sample_size(u64 sample_type
)
102 u64 mask
= sample_type
& PERF_SAMPLE_MASK
;
106 for (i
= 0; i
< 64; i
++) {
107 if (mask
& (1ULL << i
))
117 * __perf_evsel__calc_id_pos - calculate id_pos.
118 * @sample_type: sample type
120 * This function returns the position of the event id (PERF_SAMPLE_ID or
121 * PERF_SAMPLE_IDENTIFIER) in a sample event i.e. in the array of struct
124 static int __perf_evsel__calc_id_pos(u64 sample_type
)
128 if (sample_type
& PERF_SAMPLE_IDENTIFIER
)
131 if (!(sample_type
& PERF_SAMPLE_ID
))
134 if (sample_type
& PERF_SAMPLE_IP
)
137 if (sample_type
& PERF_SAMPLE_TID
)
140 if (sample_type
& PERF_SAMPLE_TIME
)
143 if (sample_type
& PERF_SAMPLE_ADDR
)
150 * __perf_evsel__calc_is_pos - calculate is_pos.
151 * @sample_type: sample type
153 * This function returns the position (counting backwards) of the event id
154 * (PERF_SAMPLE_ID or PERF_SAMPLE_IDENTIFIER) in a non-sample event i.e. if
155 * sample_id_all is used there is an id sample appended to non-sample events.
157 static int __perf_evsel__calc_is_pos(u64 sample_type
)
161 if (sample_type
& PERF_SAMPLE_IDENTIFIER
)
164 if (!(sample_type
& PERF_SAMPLE_ID
))
167 if (sample_type
& PERF_SAMPLE_CPU
)
170 if (sample_type
& PERF_SAMPLE_STREAM_ID
)
176 void perf_evsel__calc_id_pos(struct perf_evsel
*evsel
)
178 evsel
->id_pos
= __perf_evsel__calc_id_pos(evsel
->attr
.sample_type
);
179 evsel
->is_pos
= __perf_evsel__calc_is_pos(evsel
->attr
.sample_type
);
182 void __perf_evsel__set_sample_bit(struct perf_evsel
*evsel
,
183 enum perf_event_sample_format bit
)
185 if (!(evsel
->attr
.sample_type
& bit
)) {
186 evsel
->attr
.sample_type
|= bit
;
187 evsel
->sample_size
+= sizeof(u64
);
188 perf_evsel__calc_id_pos(evsel
);
192 void __perf_evsel__reset_sample_bit(struct perf_evsel
*evsel
,
193 enum perf_event_sample_format bit
)
195 if (evsel
->attr
.sample_type
& bit
) {
196 evsel
->attr
.sample_type
&= ~bit
;
197 evsel
->sample_size
-= sizeof(u64
);
198 perf_evsel__calc_id_pos(evsel
);
202 void perf_evsel__set_sample_id(struct perf_evsel
*evsel
,
203 bool can_sample_identifier
)
205 if (can_sample_identifier
) {
206 perf_evsel__reset_sample_bit(evsel
, ID
);
207 perf_evsel__set_sample_bit(evsel
, IDENTIFIER
);
209 perf_evsel__set_sample_bit(evsel
, ID
);
211 evsel
->attr
.read_format
|= PERF_FORMAT_ID
;
215 * perf_evsel__is_function_event - Return whether given evsel is a function
218 * @evsel - evsel selector to be tested
220 * Return %true if event is function trace event
222 bool perf_evsel__is_function_event(struct perf_evsel
*evsel
)
224 #define FUNCTION_EVENT "ftrace:function"
226 return evsel
->name
&&
227 !strncmp(FUNCTION_EVENT
, evsel
->name
, sizeof(FUNCTION_EVENT
));
229 #undef FUNCTION_EVENT
232 void perf_evsel__init(struct perf_evsel
*evsel
,
233 struct perf_event_attr
*attr
, int idx
)
236 evsel
->tracking
= !idx
;
238 evsel
->leader
= evsel
;
241 evsel
->evlist
= NULL
;
243 INIT_LIST_HEAD(&evsel
->node
);
244 INIT_LIST_HEAD(&evsel
->config_terms
);
245 perf_evsel__object
.init(evsel
);
246 evsel
->sample_size
= __perf_evsel__sample_size(attr
->sample_type
);
247 perf_evsel__calc_id_pos(evsel
);
248 evsel
->cmdline_group_boundary
= false;
249 evsel
->metric_expr
= NULL
;
250 evsel
->metric_name
= NULL
;
251 evsel
->metric_events
= NULL
;
252 evsel
->collect_stat
= false;
255 struct perf_evsel
*perf_evsel__new_idx(struct perf_event_attr
*attr
, int idx
)
257 struct perf_evsel
*evsel
= zalloc(perf_evsel__object
.size
);
260 perf_evsel__init(evsel
, attr
, idx
);
262 if (perf_evsel__is_bpf_output(evsel
)) {
263 evsel
->attr
.sample_type
|= (PERF_SAMPLE_RAW
| PERF_SAMPLE_TIME
|
264 PERF_SAMPLE_CPU
| PERF_SAMPLE_PERIOD
),
265 evsel
->attr
.sample_period
= 1;
271 struct perf_evsel
*perf_evsel__new_cycles(void)
273 struct perf_event_attr attr
= {
274 .type
= PERF_TYPE_HARDWARE
,
275 .config
= PERF_COUNT_HW_CPU_CYCLES
,
276 .exclude_kernel
= geteuid() != 0,
278 struct perf_evsel
*evsel
;
280 event_attr_init(&attr
);
282 * Unnamed union member, not supported as struct member named
283 * initializer in older compilers such as gcc 4.4.7
285 * Just for probing the precise_ip:
287 attr
.sample_period
= 1;
289 perf_event_attr__set_max_precise_ip(&attr
);
291 * Now let the usual logic to set up the perf_event_attr defaults
292 * to kick in when we return and before perf_evsel__open() is called.
294 attr
.sample_period
= 0;
296 evsel
= perf_evsel__new(&attr
);
300 /* use asprintf() because free(evsel) assumes name is allocated */
301 if (asprintf(&evsel
->name
, "cycles%s%s%.*s",
302 (attr
.precise_ip
|| attr
.exclude_kernel
) ? ":" : "",
303 attr
.exclude_kernel
? "u" : "",
304 attr
.precise_ip
? attr
.precise_ip
+ 1 : 0, "ppp") < 0)
309 perf_evsel__delete(evsel
);
315 * Returns pointer with encoded error via <linux/err.h> interface.
317 struct perf_evsel
*perf_evsel__newtp_idx(const char *sys
, const char *name
, int idx
)
319 struct perf_evsel
*evsel
= zalloc(perf_evsel__object
.size
);
325 struct perf_event_attr attr
= {
326 .type
= PERF_TYPE_TRACEPOINT
,
327 .sample_type
= (PERF_SAMPLE_RAW
| PERF_SAMPLE_TIME
|
328 PERF_SAMPLE_CPU
| PERF_SAMPLE_PERIOD
),
331 if (asprintf(&evsel
->name
, "%s:%s", sys
, name
) < 0)
334 evsel
->tp_format
= trace_event__tp_format(sys
, name
);
335 if (IS_ERR(evsel
->tp_format
)) {
336 err
= PTR_ERR(evsel
->tp_format
);
340 event_attr_init(&attr
);
341 attr
.config
= evsel
->tp_format
->id
;
342 attr
.sample_period
= 1;
343 perf_evsel__init(evsel
, &attr
, idx
);
355 const char *perf_evsel__hw_names
[PERF_COUNT_HW_MAX
] = {
363 "stalled-cycles-frontend",
364 "stalled-cycles-backend",
368 static const char *__perf_evsel__hw_name(u64 config
)
370 if (config
< PERF_COUNT_HW_MAX
&& perf_evsel__hw_names
[config
])
371 return perf_evsel__hw_names
[config
];
373 return "unknown-hardware";
376 static int perf_evsel__add_modifiers(struct perf_evsel
*evsel
, char *bf
, size_t size
)
378 int colon
= 0, r
= 0;
379 struct perf_event_attr
*attr
= &evsel
->attr
;
380 bool exclude_guest_default
= false;
382 #define MOD_PRINT(context, mod) do { \
383 if (!attr->exclude_##context) { \
384 if (!colon) colon = ++r; \
385 r += scnprintf(bf + r, size - r, "%c", mod); \
388 if (attr
->exclude_kernel
|| attr
->exclude_user
|| attr
->exclude_hv
) {
389 MOD_PRINT(kernel
, 'k');
390 MOD_PRINT(user
, 'u');
392 exclude_guest_default
= true;
395 if (attr
->precise_ip
) {
398 r
+= scnprintf(bf
+ r
, size
- r
, "%.*s", attr
->precise_ip
, "ppp");
399 exclude_guest_default
= true;
402 if (attr
->exclude_host
|| attr
->exclude_guest
== exclude_guest_default
) {
403 MOD_PRINT(host
, 'H');
404 MOD_PRINT(guest
, 'G');
412 static int perf_evsel__hw_name(struct perf_evsel
*evsel
, char *bf
, size_t size
)
414 int r
= scnprintf(bf
, size
, "%s", __perf_evsel__hw_name(evsel
->attr
.config
));
415 return r
+ perf_evsel__add_modifiers(evsel
, bf
+ r
, size
- r
);
418 const char *perf_evsel__sw_names
[PERF_COUNT_SW_MAX
] = {
431 static const char *__perf_evsel__sw_name(u64 config
)
433 if (config
< PERF_COUNT_SW_MAX
&& perf_evsel__sw_names
[config
])
434 return perf_evsel__sw_names
[config
];
435 return "unknown-software";
438 static int perf_evsel__sw_name(struct perf_evsel
*evsel
, char *bf
, size_t size
)
440 int r
= scnprintf(bf
, size
, "%s", __perf_evsel__sw_name(evsel
->attr
.config
));
441 return r
+ perf_evsel__add_modifiers(evsel
, bf
+ r
, size
- r
);
444 static int __perf_evsel__bp_name(char *bf
, size_t size
, u64 addr
, u64 type
)
448 r
= scnprintf(bf
, size
, "mem:0x%" PRIx64
":", addr
);
450 if (type
& HW_BREAKPOINT_R
)
451 r
+= scnprintf(bf
+ r
, size
- r
, "r");
453 if (type
& HW_BREAKPOINT_W
)
454 r
+= scnprintf(bf
+ r
, size
- r
, "w");
456 if (type
& HW_BREAKPOINT_X
)
457 r
+= scnprintf(bf
+ r
, size
- r
, "x");
462 static int perf_evsel__bp_name(struct perf_evsel
*evsel
, char *bf
, size_t size
)
464 struct perf_event_attr
*attr
= &evsel
->attr
;
465 int r
= __perf_evsel__bp_name(bf
, size
, attr
->bp_addr
, attr
->bp_type
);
466 return r
+ perf_evsel__add_modifiers(evsel
, bf
+ r
, size
- r
);
469 const char *perf_evsel__hw_cache
[PERF_COUNT_HW_CACHE_MAX
]
470 [PERF_EVSEL__MAX_ALIASES
] = {
471 { "L1-dcache", "l1-d", "l1d", "L1-data", },
472 { "L1-icache", "l1-i", "l1i", "L1-instruction", },
474 { "dTLB", "d-tlb", "Data-TLB", },
475 { "iTLB", "i-tlb", "Instruction-TLB", },
476 { "branch", "branches", "bpu", "btb", "bpc", },
480 const char *perf_evsel__hw_cache_op
[PERF_COUNT_HW_CACHE_OP_MAX
]
481 [PERF_EVSEL__MAX_ALIASES
] = {
482 { "load", "loads", "read", },
483 { "store", "stores", "write", },
484 { "prefetch", "prefetches", "speculative-read", "speculative-load", },
487 const char *perf_evsel__hw_cache_result
[PERF_COUNT_HW_CACHE_RESULT_MAX
]
488 [PERF_EVSEL__MAX_ALIASES
] = {
489 { "refs", "Reference", "ops", "access", },
490 { "misses", "miss", },
493 #define C(x) PERF_COUNT_HW_CACHE_##x
494 #define CACHE_READ (1 << C(OP_READ))
495 #define CACHE_WRITE (1 << C(OP_WRITE))
496 #define CACHE_PREFETCH (1 << C(OP_PREFETCH))
497 #define COP(x) (1 << x)
500 * cache operartion stat
501 * L1I : Read and prefetch only
502 * ITLB and BPU : Read-only
504 static unsigned long perf_evsel__hw_cache_stat
[C(MAX
)] = {
505 [C(L1D
)] = (CACHE_READ
| CACHE_WRITE
| CACHE_PREFETCH
),
506 [C(L1I
)] = (CACHE_READ
| CACHE_PREFETCH
),
507 [C(LL
)] = (CACHE_READ
| CACHE_WRITE
| CACHE_PREFETCH
),
508 [C(DTLB
)] = (CACHE_READ
| CACHE_WRITE
| CACHE_PREFETCH
),
509 [C(ITLB
)] = (CACHE_READ
),
510 [C(BPU
)] = (CACHE_READ
),
511 [C(NODE
)] = (CACHE_READ
| CACHE_WRITE
| CACHE_PREFETCH
),
514 bool perf_evsel__is_cache_op_valid(u8 type
, u8 op
)
516 if (perf_evsel__hw_cache_stat
[type
] & COP(op
))
517 return true; /* valid */
519 return false; /* invalid */
522 int __perf_evsel__hw_cache_type_op_res_name(u8 type
, u8 op
, u8 result
,
523 char *bf
, size_t size
)
526 return scnprintf(bf
, size
, "%s-%s-%s", perf_evsel__hw_cache
[type
][0],
527 perf_evsel__hw_cache_op
[op
][0],
528 perf_evsel__hw_cache_result
[result
][0]);
531 return scnprintf(bf
, size
, "%s-%s", perf_evsel__hw_cache
[type
][0],
532 perf_evsel__hw_cache_op
[op
][1]);
535 static int __perf_evsel__hw_cache_name(u64 config
, char *bf
, size_t size
)
537 u8 op
, result
, type
= (config
>> 0) & 0xff;
538 const char *err
= "unknown-ext-hardware-cache-type";
540 if (type
>= PERF_COUNT_HW_CACHE_MAX
)
543 op
= (config
>> 8) & 0xff;
544 err
= "unknown-ext-hardware-cache-op";
545 if (op
>= PERF_COUNT_HW_CACHE_OP_MAX
)
548 result
= (config
>> 16) & 0xff;
549 err
= "unknown-ext-hardware-cache-result";
550 if (result
>= PERF_COUNT_HW_CACHE_RESULT_MAX
)
553 err
= "invalid-cache";
554 if (!perf_evsel__is_cache_op_valid(type
, op
))
557 return __perf_evsel__hw_cache_type_op_res_name(type
, op
, result
, bf
, size
);
559 return scnprintf(bf
, size
, "%s", err
);
562 static int perf_evsel__hw_cache_name(struct perf_evsel
*evsel
, char *bf
, size_t size
)
564 int ret
= __perf_evsel__hw_cache_name(evsel
->attr
.config
, bf
, size
);
565 return ret
+ perf_evsel__add_modifiers(evsel
, bf
+ ret
, size
- ret
);
568 static int perf_evsel__raw_name(struct perf_evsel
*evsel
, char *bf
, size_t size
)
570 int ret
= scnprintf(bf
, size
, "raw 0x%" PRIx64
, evsel
->attr
.config
);
571 return ret
+ perf_evsel__add_modifiers(evsel
, bf
+ ret
, size
- ret
);
574 const char *perf_evsel__name(struct perf_evsel
*evsel
)
581 switch (evsel
->attr
.type
) {
583 perf_evsel__raw_name(evsel
, bf
, sizeof(bf
));
586 case PERF_TYPE_HARDWARE
:
587 perf_evsel__hw_name(evsel
, bf
, sizeof(bf
));
590 case PERF_TYPE_HW_CACHE
:
591 perf_evsel__hw_cache_name(evsel
, bf
, sizeof(bf
));
594 case PERF_TYPE_SOFTWARE
:
595 perf_evsel__sw_name(evsel
, bf
, sizeof(bf
));
598 case PERF_TYPE_TRACEPOINT
:
599 scnprintf(bf
, sizeof(bf
), "%s", "unknown tracepoint");
602 case PERF_TYPE_BREAKPOINT
:
603 perf_evsel__bp_name(evsel
, bf
, sizeof(bf
));
607 scnprintf(bf
, sizeof(bf
), "unknown attr type: %d",
612 evsel
->name
= strdup(bf
);
614 return evsel
->name
?: "unknown";
617 const char *perf_evsel__group_name(struct perf_evsel
*evsel
)
619 return evsel
->group_name
?: "anon group";
622 int perf_evsel__group_desc(struct perf_evsel
*evsel
, char *buf
, size_t size
)
625 struct perf_evsel
*pos
;
626 const char *group_name
= perf_evsel__group_name(evsel
);
628 ret
= scnprintf(buf
, size
, "%s", group_name
);
630 ret
+= scnprintf(buf
+ ret
, size
- ret
, " { %s",
631 perf_evsel__name(evsel
));
633 for_each_group_member(pos
, evsel
)
634 ret
+= scnprintf(buf
+ ret
, size
- ret
, ", %s",
635 perf_evsel__name(pos
));
637 ret
+= scnprintf(buf
+ ret
, size
- ret
, " }");
642 void perf_evsel__config_callchain(struct perf_evsel
*evsel
,
643 struct record_opts
*opts
,
644 struct callchain_param
*param
)
646 bool function
= perf_evsel__is_function_event(evsel
);
647 struct perf_event_attr
*attr
= &evsel
->attr
;
649 perf_evsel__set_sample_bit(evsel
, CALLCHAIN
);
651 attr
->sample_max_stack
= param
->max_stack
;
653 if (param
->record_mode
== CALLCHAIN_LBR
) {
654 if (!opts
->branch_stack
) {
655 if (attr
->exclude_user
) {
656 pr_warning("LBR callstack option is only available "
657 "to get user callchain information. "
658 "Falling back to framepointers.\n");
660 perf_evsel__set_sample_bit(evsel
, BRANCH_STACK
);
661 attr
->branch_sample_type
= PERF_SAMPLE_BRANCH_USER
|
662 PERF_SAMPLE_BRANCH_CALL_STACK
|
663 PERF_SAMPLE_BRANCH_NO_CYCLES
|
664 PERF_SAMPLE_BRANCH_NO_FLAGS
;
667 pr_warning("Cannot use LBR callstack with branch stack. "
668 "Falling back to framepointers.\n");
671 if (param
->record_mode
== CALLCHAIN_DWARF
) {
673 perf_evsel__set_sample_bit(evsel
, REGS_USER
);
674 perf_evsel__set_sample_bit(evsel
, STACK_USER
);
675 attr
->sample_regs_user
= PERF_REGS_MASK
;
676 attr
->sample_stack_user
= param
->dump_size
;
677 attr
->exclude_callchain_user
= 1;
679 pr_info("Cannot use DWARF unwind for function trace event,"
680 " falling back to framepointers.\n");
685 pr_info("Disabling user space callchains for function trace event.\n");
686 attr
->exclude_callchain_user
= 1;
691 perf_evsel__reset_callgraph(struct perf_evsel
*evsel
,
692 struct callchain_param
*param
)
694 struct perf_event_attr
*attr
= &evsel
->attr
;
696 perf_evsel__reset_sample_bit(evsel
, CALLCHAIN
);
697 if (param
->record_mode
== CALLCHAIN_LBR
) {
698 perf_evsel__reset_sample_bit(evsel
, BRANCH_STACK
);
699 attr
->branch_sample_type
&= ~(PERF_SAMPLE_BRANCH_USER
|
700 PERF_SAMPLE_BRANCH_CALL_STACK
);
702 if (param
->record_mode
== CALLCHAIN_DWARF
) {
703 perf_evsel__reset_sample_bit(evsel
, REGS_USER
);
704 perf_evsel__reset_sample_bit(evsel
, STACK_USER
);
708 static void apply_config_terms(struct perf_evsel
*evsel
,
709 struct record_opts
*opts
)
711 struct perf_evsel_config_term
*term
;
712 struct list_head
*config_terms
= &evsel
->config_terms
;
713 struct perf_event_attr
*attr
= &evsel
->attr
;
714 struct callchain_param param
;
717 const char *callgraph_buf
= NULL
;
719 /* callgraph default */
720 param
.record_mode
= callchain_param
.record_mode
;
722 list_for_each_entry(term
, config_terms
, list
) {
723 switch (term
->type
) {
724 case PERF_EVSEL__CONFIG_TERM_PERIOD
:
725 attr
->sample_period
= term
->val
.period
;
728 case PERF_EVSEL__CONFIG_TERM_FREQ
:
729 attr
->sample_freq
= term
->val
.freq
;
732 case PERF_EVSEL__CONFIG_TERM_TIME
:
734 perf_evsel__set_sample_bit(evsel
, TIME
);
736 perf_evsel__reset_sample_bit(evsel
, TIME
);
738 case PERF_EVSEL__CONFIG_TERM_CALLGRAPH
:
739 callgraph_buf
= term
->val
.callgraph
;
741 case PERF_EVSEL__CONFIG_TERM_BRANCH
:
742 if (term
->val
.branch
&& strcmp(term
->val
.branch
, "no")) {
743 perf_evsel__set_sample_bit(evsel
, BRANCH_STACK
);
744 parse_branch_str(term
->val
.branch
,
745 &attr
->branch_sample_type
);
747 perf_evsel__reset_sample_bit(evsel
, BRANCH_STACK
);
749 case PERF_EVSEL__CONFIG_TERM_STACK_USER
:
750 dump_size
= term
->val
.stack_user
;
752 case PERF_EVSEL__CONFIG_TERM_MAX_STACK
:
753 max_stack
= term
->val
.max_stack
;
755 case PERF_EVSEL__CONFIG_TERM_INHERIT
:
757 * attr->inherit should has already been set by
758 * perf_evsel__config. If user explicitly set
759 * inherit using config terms, override global
760 * opt->no_inherit setting.
762 attr
->inherit
= term
->val
.inherit
? 1 : 0;
764 case PERF_EVSEL__CONFIG_TERM_OVERWRITE
:
765 attr
->write_backward
= term
->val
.overwrite
? 1 : 0;
772 /* User explicitly set per-event callgraph, clear the old setting and reset. */
773 if ((callgraph_buf
!= NULL
) || (dump_size
> 0) || max_stack
) {
775 param
.max_stack
= max_stack
;
776 if (callgraph_buf
== NULL
)
777 callgraph_buf
= "fp";
780 /* parse callgraph parameters */
781 if (callgraph_buf
!= NULL
) {
782 if (!strcmp(callgraph_buf
, "no")) {
783 param
.enabled
= false;
784 param
.record_mode
= CALLCHAIN_NONE
;
786 param
.enabled
= true;
787 if (parse_callchain_record(callgraph_buf
, ¶m
)) {
788 pr_err("per-event callgraph setting for %s failed. "
789 "Apply callgraph global setting for it\n",
796 dump_size
= round_up(dump_size
, sizeof(u64
));
797 param
.dump_size
= dump_size
;
800 /* If global callgraph set, clear it */
801 if (callchain_param
.enabled
)
802 perf_evsel__reset_callgraph(evsel
, &callchain_param
);
804 /* set perf-event callgraph */
806 perf_evsel__config_callchain(evsel
, opts
, ¶m
);
811 * The enable_on_exec/disabled value strategy:
813 * 1) For any type of traced program:
814 * - all independent events and group leaders are disabled
815 * - all group members are enabled
817 * Group members are ruled by group leaders. They need to
818 * be enabled, because the group scheduling relies on that.
820 * 2) For traced programs executed by perf:
821 * - all independent events and group leaders have
823 * - we don't specifically enable or disable any event during
826 * Independent events and group leaders are initially disabled
827 * and get enabled by exec. Group members are ruled by group
828 * leaders as stated in 1).
830 * 3) For traced programs attached by perf (pid/tid):
831 * - we specifically enable or disable all events during
834 * When attaching events to already running traced we
835 * enable/disable events specifically, as there's no
836 * initial traced exec call.
838 void perf_evsel__config(struct perf_evsel
*evsel
, struct record_opts
*opts
,
839 struct callchain_param
*callchain
)
841 struct perf_evsel
*leader
= evsel
->leader
;
842 struct perf_event_attr
*attr
= &evsel
->attr
;
843 int track
= evsel
->tracking
;
844 bool per_cpu
= opts
->target
.default_per_cpu
&& !opts
->target
.per_thread
;
846 attr
->sample_id_all
= perf_missing_features
.sample_id_all
? 0 : 1;
847 attr
->inherit
= !opts
->no_inherit
;
848 attr
->write_backward
= opts
->overwrite
? 1 : 0;
850 perf_evsel__set_sample_bit(evsel
, IP
);
851 perf_evsel__set_sample_bit(evsel
, TID
);
853 if (evsel
->sample_read
) {
854 perf_evsel__set_sample_bit(evsel
, READ
);
857 * We need ID even in case of single event, because
858 * PERF_SAMPLE_READ process ID specific data.
860 perf_evsel__set_sample_id(evsel
, false);
863 * Apply group format only if we belong to group
864 * with more than one members.
866 if (leader
->nr_members
> 1) {
867 attr
->read_format
|= PERF_FORMAT_GROUP
;
873 * We default some events to have a default interval. But keep
874 * it a weak assumption overridable by the user.
876 if (!attr
->sample_period
|| (opts
->user_freq
!= UINT_MAX
||
877 opts
->user_interval
!= ULLONG_MAX
)) {
879 perf_evsel__set_sample_bit(evsel
, PERIOD
);
881 attr
->sample_freq
= opts
->freq
;
883 attr
->sample_period
= opts
->default_interval
;
888 * Disable sampling for all group members other
889 * than leader in case leader 'leads' the sampling.
891 if ((leader
!= evsel
) && leader
->sample_read
) {
892 attr
->sample_freq
= 0;
893 attr
->sample_period
= 0;
896 if (opts
->no_samples
)
897 attr
->sample_freq
= 0;
899 if (opts
->inherit_stat
)
900 attr
->inherit_stat
= 1;
902 if (opts
->sample_address
) {
903 perf_evsel__set_sample_bit(evsel
, ADDR
);
904 attr
->mmap_data
= track
;
908 * We don't allow user space callchains for function trace
909 * event, due to issues with page faults while tracing page
910 * fault handler and its overall trickiness nature.
912 if (perf_evsel__is_function_event(evsel
))
913 evsel
->attr
.exclude_callchain_user
= 1;
915 if (callchain
&& callchain
->enabled
&& !evsel
->no_aux_samples
)
916 perf_evsel__config_callchain(evsel
, opts
, callchain
);
918 if (opts
->sample_intr_regs
) {
919 attr
->sample_regs_intr
= opts
->sample_intr_regs
;
920 perf_evsel__set_sample_bit(evsel
, REGS_INTR
);
923 if (target__has_cpu(&opts
->target
) || opts
->sample_cpu
)
924 perf_evsel__set_sample_bit(evsel
, CPU
);
927 perf_evsel__set_sample_bit(evsel
, PERIOD
);
930 * When the user explicitly disabled time don't force it here.
932 if (opts
->sample_time
&&
933 (!perf_missing_features
.sample_id_all
&&
934 (!opts
->no_inherit
|| target__has_cpu(&opts
->target
) || per_cpu
||
935 opts
->sample_time_set
)))
936 perf_evsel__set_sample_bit(evsel
, TIME
);
938 if (opts
->raw_samples
&& !evsel
->no_aux_samples
) {
939 perf_evsel__set_sample_bit(evsel
, TIME
);
940 perf_evsel__set_sample_bit(evsel
, RAW
);
941 perf_evsel__set_sample_bit(evsel
, CPU
);
944 if (opts
->sample_address
)
945 perf_evsel__set_sample_bit(evsel
, DATA_SRC
);
947 if (opts
->no_buffering
) {
949 attr
->wakeup_events
= 1;
951 if (opts
->branch_stack
&& !evsel
->no_aux_samples
) {
952 perf_evsel__set_sample_bit(evsel
, BRANCH_STACK
);
953 attr
->branch_sample_type
= opts
->branch_stack
;
956 if (opts
->sample_weight
)
957 perf_evsel__set_sample_bit(evsel
, WEIGHT
);
961 attr
->mmap2
= track
&& !perf_missing_features
.mmap2
;
964 if (opts
->record_namespaces
)
965 attr
->namespaces
= track
;
967 if (opts
->record_switch_events
)
968 attr
->context_switch
= track
;
970 if (opts
->sample_transaction
)
971 perf_evsel__set_sample_bit(evsel
, TRANSACTION
);
973 if (opts
->running_time
) {
974 evsel
->attr
.read_format
|=
975 PERF_FORMAT_TOTAL_TIME_ENABLED
|
976 PERF_FORMAT_TOTAL_TIME_RUNNING
;
980 * XXX see the function comment above
982 * Disabling only independent events or group leaders,
983 * keeping group members enabled.
985 if (perf_evsel__is_group_leader(evsel
))
989 * Setting enable_on_exec for independent events and
990 * group leaders for traced executed by perf.
992 if (target__none(&opts
->target
) && perf_evsel__is_group_leader(evsel
) &&
993 !opts
->initial_delay
)
994 attr
->enable_on_exec
= 1;
996 if (evsel
->immediate
) {
998 attr
->enable_on_exec
= 0;
1001 clockid
= opts
->clockid
;
1002 if (opts
->use_clockid
) {
1003 attr
->use_clockid
= 1;
1004 attr
->clockid
= opts
->clockid
;
1007 if (evsel
->precise_max
)
1008 perf_event_attr__set_max_precise_ip(attr
);
1010 if (opts
->all_user
) {
1011 attr
->exclude_kernel
= 1;
1012 attr
->exclude_user
= 0;
1015 if (opts
->all_kernel
) {
1016 attr
->exclude_kernel
= 0;
1017 attr
->exclude_user
= 1;
1021 * Apply event specific term settings,
1022 * it overloads any global configuration.
1024 apply_config_terms(evsel
, opts
);
1026 evsel
->ignore_missing_thread
= opts
->ignore_missing_thread
;
1029 static int perf_evsel__alloc_fd(struct perf_evsel
*evsel
, int ncpus
, int nthreads
)
1031 if (evsel
->system_wide
)
1034 evsel
->fd
= xyarray__new(ncpus
, nthreads
, sizeof(int));
1038 for (cpu
= 0; cpu
< ncpus
; cpu
++) {
1039 for (thread
= 0; thread
< nthreads
; thread
++) {
1040 FD(evsel
, cpu
, thread
) = -1;
1045 return evsel
->fd
!= NULL
? 0 : -ENOMEM
;
1048 static int perf_evsel__run_ioctl(struct perf_evsel
*evsel
, int ncpus
, int nthreads
,
1053 if (evsel
->system_wide
)
1056 for (cpu
= 0; cpu
< ncpus
; cpu
++) {
1057 for (thread
= 0; thread
< nthreads
; thread
++) {
1058 int fd
= FD(evsel
, cpu
, thread
),
1059 err
= ioctl(fd
, ioc
, arg
);
1069 int perf_evsel__apply_filter(struct perf_evsel
*evsel
, int ncpus
, int nthreads
,
1072 return perf_evsel__run_ioctl(evsel
, ncpus
, nthreads
,
1073 PERF_EVENT_IOC_SET_FILTER
,
1077 int perf_evsel__set_filter(struct perf_evsel
*evsel
, const char *filter
)
1079 char *new_filter
= strdup(filter
);
1081 if (new_filter
!= NULL
) {
1082 free(evsel
->filter
);
1083 evsel
->filter
= new_filter
;
1090 static int perf_evsel__append_filter(struct perf_evsel
*evsel
,
1091 const char *fmt
, const char *filter
)
1095 if (evsel
->filter
== NULL
)
1096 return perf_evsel__set_filter(evsel
, filter
);
1098 if (asprintf(&new_filter
, fmt
, evsel
->filter
, filter
) > 0) {
1099 free(evsel
->filter
);
1100 evsel
->filter
= new_filter
;
1107 int perf_evsel__append_tp_filter(struct perf_evsel
*evsel
, const char *filter
)
1109 return perf_evsel__append_filter(evsel
, "(%s) && (%s)", filter
);
1112 int perf_evsel__append_addr_filter(struct perf_evsel
*evsel
, const char *filter
)
1114 return perf_evsel__append_filter(evsel
, "%s,%s", filter
);
1117 int perf_evsel__enable(struct perf_evsel
*evsel
)
1119 int nthreads
= thread_map__nr(evsel
->threads
);
1120 int ncpus
= cpu_map__nr(evsel
->cpus
);
1122 return perf_evsel__run_ioctl(evsel
, ncpus
, nthreads
,
1123 PERF_EVENT_IOC_ENABLE
,
1127 int perf_evsel__disable(struct perf_evsel
*evsel
)
1129 int nthreads
= thread_map__nr(evsel
->threads
);
1130 int ncpus
= cpu_map__nr(evsel
->cpus
);
1132 return perf_evsel__run_ioctl(evsel
, ncpus
, nthreads
,
1133 PERF_EVENT_IOC_DISABLE
,
1137 int perf_evsel__alloc_id(struct perf_evsel
*evsel
, int ncpus
, int nthreads
)
1139 if (ncpus
== 0 || nthreads
== 0)
1142 if (evsel
->system_wide
)
1145 evsel
->sample_id
= xyarray__new(ncpus
, nthreads
, sizeof(struct perf_sample_id
));
1146 if (evsel
->sample_id
== NULL
)
1149 evsel
->id
= zalloc(ncpus
* nthreads
* sizeof(u64
));
1150 if (evsel
->id
== NULL
) {
1151 xyarray__delete(evsel
->sample_id
);
1152 evsel
->sample_id
= NULL
;
1159 static void perf_evsel__free_fd(struct perf_evsel
*evsel
)
1161 xyarray__delete(evsel
->fd
);
1165 static void perf_evsel__free_id(struct perf_evsel
*evsel
)
1167 xyarray__delete(evsel
->sample_id
);
1168 evsel
->sample_id
= NULL
;
1172 static void perf_evsel__free_config_terms(struct perf_evsel
*evsel
)
1174 struct perf_evsel_config_term
*term
, *h
;
1176 list_for_each_entry_safe(term
, h
, &evsel
->config_terms
, list
) {
1177 list_del(&term
->list
);
1182 void perf_evsel__close_fd(struct perf_evsel
*evsel
, int ncpus
, int nthreads
)
1186 if (evsel
->system_wide
)
1189 for (cpu
= 0; cpu
< ncpus
; cpu
++)
1190 for (thread
= 0; thread
< nthreads
; ++thread
) {
1191 close(FD(evsel
, cpu
, thread
));
1192 FD(evsel
, cpu
, thread
) = -1;
1196 void perf_evsel__exit(struct perf_evsel
*evsel
)
1198 assert(list_empty(&evsel
->node
));
1199 assert(evsel
->evlist
== NULL
);
1200 perf_evsel__free_fd(evsel
);
1201 perf_evsel__free_id(evsel
);
1202 perf_evsel__free_config_terms(evsel
);
1203 close_cgroup(evsel
->cgrp
);
1204 cpu_map__put(evsel
->cpus
);
1205 cpu_map__put(evsel
->own_cpus
);
1206 thread_map__put(evsel
->threads
);
1207 zfree(&evsel
->group_name
);
1208 zfree(&evsel
->name
);
1209 perf_evsel__object
.fini(evsel
);
1212 void perf_evsel__delete(struct perf_evsel
*evsel
)
1214 perf_evsel__exit(evsel
);
1218 void perf_evsel__compute_deltas(struct perf_evsel
*evsel
, int cpu
, int thread
,
1219 struct perf_counts_values
*count
)
1221 struct perf_counts_values tmp
;
1223 if (!evsel
->prev_raw_counts
)
1227 tmp
= evsel
->prev_raw_counts
->aggr
;
1228 evsel
->prev_raw_counts
->aggr
= *count
;
1230 tmp
= *perf_counts(evsel
->prev_raw_counts
, cpu
, thread
);
1231 *perf_counts(evsel
->prev_raw_counts
, cpu
, thread
) = *count
;
1234 count
->val
= count
->val
- tmp
.val
;
1235 count
->ena
= count
->ena
- tmp
.ena
;
1236 count
->run
= count
->run
- tmp
.run
;
1239 void perf_counts_values__scale(struct perf_counts_values
*count
,
1240 bool scale
, s8
*pscaled
)
1245 if (count
->run
== 0) {
1248 } else if (count
->run
< count
->ena
) {
1250 count
->val
= (u64
)((double) count
->val
* count
->ena
/ count
->run
+ 0.5);
1253 count
->ena
= count
->run
= 0;
1259 int perf_evsel__read(struct perf_evsel
*evsel
, int cpu
, int thread
,
1260 struct perf_counts_values
*count
)
1262 memset(count
, 0, sizeof(*count
));
1264 if (FD(evsel
, cpu
, thread
) < 0)
1267 if (readn(FD(evsel
, cpu
, thread
), count
, sizeof(*count
)) <= 0)
1273 int __perf_evsel__read_on_cpu(struct perf_evsel
*evsel
,
1274 int cpu
, int thread
, bool scale
)
1276 struct perf_counts_values count
;
1277 size_t nv
= scale
? 3 : 1;
1279 if (FD(evsel
, cpu
, thread
) < 0)
1282 if (evsel
->counts
== NULL
&& perf_evsel__alloc_counts(evsel
, cpu
+ 1, thread
+ 1) < 0)
1285 if (readn(FD(evsel
, cpu
, thread
), &count
, nv
* sizeof(u64
)) <= 0)
1288 perf_evsel__compute_deltas(evsel
, cpu
, thread
, &count
);
1289 perf_counts_values__scale(&count
, scale
, NULL
);
1290 *perf_counts(evsel
->counts
, cpu
, thread
) = count
;
1294 static int get_group_fd(struct perf_evsel
*evsel
, int cpu
, int thread
)
1296 struct perf_evsel
*leader
= evsel
->leader
;
1299 if (perf_evsel__is_group_leader(evsel
))
1303 * Leader must be already processed/open,
1304 * if not it's a bug.
1306 BUG_ON(!leader
->fd
);
1308 fd
= FD(leader
, cpu
, thread
);
1319 static void __p_bits(char *buf
, size_t size
, u64 value
, struct bit_names
*bits
)
1321 bool first_bit
= true;
1325 if (value
& bits
[i
].bit
) {
1326 buf
+= scnprintf(buf
, size
, "%s%s", first_bit
? "" : "|", bits
[i
].name
);
1329 } while (bits
[++i
].name
!= NULL
);
1332 static void __p_sample_type(char *buf
, size_t size
, u64 value
)
1334 #define bit_name(n) { PERF_SAMPLE_##n, #n }
1335 struct bit_names bits
[] = {
1336 bit_name(IP
), bit_name(TID
), bit_name(TIME
), bit_name(ADDR
),
1337 bit_name(READ
), bit_name(CALLCHAIN
), bit_name(ID
), bit_name(CPU
),
1338 bit_name(PERIOD
), bit_name(STREAM_ID
), bit_name(RAW
),
1339 bit_name(BRANCH_STACK
), bit_name(REGS_USER
), bit_name(STACK_USER
),
1340 bit_name(IDENTIFIER
), bit_name(REGS_INTR
), bit_name(DATA_SRC
),
1345 __p_bits(buf
, size
, value
, bits
);
1348 static void __p_branch_sample_type(char *buf
, size_t size
, u64 value
)
1350 #define bit_name(n) { PERF_SAMPLE_BRANCH_##n, #n }
1351 struct bit_names bits
[] = {
1352 bit_name(USER
), bit_name(KERNEL
), bit_name(HV
), bit_name(ANY
),
1353 bit_name(ANY_CALL
), bit_name(ANY_RETURN
), bit_name(IND_CALL
),
1354 bit_name(ABORT_TX
), bit_name(IN_TX
), bit_name(NO_TX
),
1355 bit_name(COND
), bit_name(CALL_STACK
), bit_name(IND_JUMP
),
1356 bit_name(CALL
), bit_name(NO_FLAGS
), bit_name(NO_CYCLES
),
1360 __p_bits(buf
, size
, value
, bits
);
1363 static void __p_read_format(char *buf
, size_t size
, u64 value
)
1365 #define bit_name(n) { PERF_FORMAT_##n, #n }
1366 struct bit_names bits
[] = {
1367 bit_name(TOTAL_TIME_ENABLED
), bit_name(TOTAL_TIME_RUNNING
),
1368 bit_name(ID
), bit_name(GROUP
),
1372 __p_bits(buf
, size
, value
, bits
);
1375 #define BUF_SIZE 1024
1377 #define p_hex(val) snprintf(buf, BUF_SIZE, "%#"PRIx64, (uint64_t)(val))
1378 #define p_unsigned(val) snprintf(buf, BUF_SIZE, "%"PRIu64, (uint64_t)(val))
1379 #define p_signed(val) snprintf(buf, BUF_SIZE, "%"PRId64, (int64_t)(val))
1380 #define p_sample_type(val) __p_sample_type(buf, BUF_SIZE, val)
1381 #define p_branch_sample_type(val) __p_branch_sample_type(buf, BUF_SIZE, val)
1382 #define p_read_format(val) __p_read_format(buf, BUF_SIZE, val)
1384 #define PRINT_ATTRn(_n, _f, _p) \
1388 ret += attr__fprintf(fp, _n, buf, priv);\
1392 #define PRINT_ATTRf(_f, _p) PRINT_ATTRn(#_f, _f, _p)
1394 int perf_event_attr__fprintf(FILE *fp
, struct perf_event_attr
*attr
,
1395 attr__fprintf_f attr__fprintf
, void *priv
)
1400 PRINT_ATTRf(type
, p_unsigned
);
1401 PRINT_ATTRf(size
, p_unsigned
);
1402 PRINT_ATTRf(config
, p_hex
);
1403 PRINT_ATTRn("{ sample_period, sample_freq }", sample_period
, p_unsigned
);
1404 PRINT_ATTRf(sample_type
, p_sample_type
);
1405 PRINT_ATTRf(read_format
, p_read_format
);
1407 PRINT_ATTRf(disabled
, p_unsigned
);
1408 PRINT_ATTRf(inherit
, p_unsigned
);
1409 PRINT_ATTRf(pinned
, p_unsigned
);
1410 PRINT_ATTRf(exclusive
, p_unsigned
);
1411 PRINT_ATTRf(exclude_user
, p_unsigned
);
1412 PRINT_ATTRf(exclude_kernel
, p_unsigned
);
1413 PRINT_ATTRf(exclude_hv
, p_unsigned
);
1414 PRINT_ATTRf(exclude_idle
, p_unsigned
);
1415 PRINT_ATTRf(mmap
, p_unsigned
);
1416 PRINT_ATTRf(comm
, p_unsigned
);
1417 PRINT_ATTRf(freq
, p_unsigned
);
1418 PRINT_ATTRf(inherit_stat
, p_unsigned
);
1419 PRINT_ATTRf(enable_on_exec
, p_unsigned
);
1420 PRINT_ATTRf(task
, p_unsigned
);
1421 PRINT_ATTRf(watermark
, p_unsigned
);
1422 PRINT_ATTRf(precise_ip
, p_unsigned
);
1423 PRINT_ATTRf(mmap_data
, p_unsigned
);
1424 PRINT_ATTRf(sample_id_all
, p_unsigned
);
1425 PRINT_ATTRf(exclude_host
, p_unsigned
);
1426 PRINT_ATTRf(exclude_guest
, p_unsigned
);
1427 PRINT_ATTRf(exclude_callchain_kernel
, p_unsigned
);
1428 PRINT_ATTRf(exclude_callchain_user
, p_unsigned
);
1429 PRINT_ATTRf(mmap2
, p_unsigned
);
1430 PRINT_ATTRf(comm_exec
, p_unsigned
);
1431 PRINT_ATTRf(use_clockid
, p_unsigned
);
1432 PRINT_ATTRf(context_switch
, p_unsigned
);
1433 PRINT_ATTRf(write_backward
, p_unsigned
);
1435 PRINT_ATTRn("{ wakeup_events, wakeup_watermark }", wakeup_events
, p_unsigned
);
1436 PRINT_ATTRf(bp_type
, p_unsigned
);
1437 PRINT_ATTRn("{ bp_addr, config1 }", bp_addr
, p_hex
);
1438 PRINT_ATTRn("{ bp_len, config2 }", bp_len
, p_hex
);
1439 PRINT_ATTRf(branch_sample_type
, p_branch_sample_type
);
1440 PRINT_ATTRf(sample_regs_user
, p_hex
);
1441 PRINT_ATTRf(sample_stack_user
, p_unsigned
);
1442 PRINT_ATTRf(clockid
, p_signed
);
1443 PRINT_ATTRf(sample_regs_intr
, p_hex
);
1444 PRINT_ATTRf(aux_watermark
, p_unsigned
);
1445 PRINT_ATTRf(sample_max_stack
, p_unsigned
);
1450 static int __open_attr__fprintf(FILE *fp
, const char *name
, const char *val
,
1451 void *priv __maybe_unused
)
1453 return fprintf(fp
, " %-32s %s\n", name
, val
);
1456 static bool ignore_missing_thread(struct perf_evsel
*evsel
,
1457 struct thread_map
*threads
,
1458 int thread
, int err
)
1460 if (!evsel
->ignore_missing_thread
)
1463 /* The system wide setup does not work with threads. */
1464 if (evsel
->system_wide
)
1467 /* The -ESRCH is perf event syscall errno for pid's not found. */
1471 /* If there's only one thread, let it fail. */
1472 if (threads
->nr
== 1)
1475 if (thread_map__remove(threads
, thread
))
1478 pr_warning("WARNING: Ignored open failure for pid %d\n",
1479 thread_map__pid(threads
, thread
));
1483 int perf_evsel__open(struct perf_evsel
*evsel
, struct cpu_map
*cpus
,
1484 struct thread_map
*threads
)
1486 int cpu
, thread
, nthreads
;
1487 unsigned long flags
= PERF_FLAG_FD_CLOEXEC
;
1489 enum { NO_CHANGE
, SET_TO_MAX
, INCREASED_MAX
} set_rlimit
= NO_CHANGE
;
1491 if (perf_missing_features
.write_backward
&& evsel
->attr
.write_backward
)
1495 static struct cpu_map
*empty_cpu_map
;
1497 if (empty_cpu_map
== NULL
) {
1498 empty_cpu_map
= cpu_map__dummy_new();
1499 if (empty_cpu_map
== NULL
)
1503 cpus
= empty_cpu_map
;
1506 if (threads
== NULL
) {
1507 static struct thread_map
*empty_thread_map
;
1509 if (empty_thread_map
== NULL
) {
1510 empty_thread_map
= thread_map__new_by_tid(-1);
1511 if (empty_thread_map
== NULL
)
1515 threads
= empty_thread_map
;
1518 if (evsel
->system_wide
)
1521 nthreads
= threads
->nr
;
1523 if (evsel
->fd
== NULL
&&
1524 perf_evsel__alloc_fd(evsel
, cpus
->nr
, nthreads
) < 0)
1528 flags
|= PERF_FLAG_PID_CGROUP
;
1529 pid
= evsel
->cgrp
->fd
;
1532 fallback_missing_features
:
1533 if (perf_missing_features
.clockid_wrong
)
1534 evsel
->attr
.clockid
= CLOCK_MONOTONIC
; /* should always work */
1535 if (perf_missing_features
.clockid
) {
1536 evsel
->attr
.use_clockid
= 0;
1537 evsel
->attr
.clockid
= 0;
1539 if (perf_missing_features
.cloexec
)
1540 flags
&= ~(unsigned long)PERF_FLAG_FD_CLOEXEC
;
1541 if (perf_missing_features
.mmap2
)
1542 evsel
->attr
.mmap2
= 0;
1543 if (perf_missing_features
.exclude_guest
)
1544 evsel
->attr
.exclude_guest
= evsel
->attr
.exclude_host
= 0;
1545 if (perf_missing_features
.lbr_flags
)
1546 evsel
->attr
.branch_sample_type
&= ~(PERF_SAMPLE_BRANCH_NO_FLAGS
|
1547 PERF_SAMPLE_BRANCH_NO_CYCLES
);
1549 if (perf_missing_features
.sample_id_all
)
1550 evsel
->attr
.sample_id_all
= 0;
1553 fprintf(stderr
, "%.60s\n", graph_dotted_line
);
1554 fprintf(stderr
, "perf_event_attr:\n");
1555 perf_event_attr__fprintf(stderr
, &evsel
->attr
, __open_attr__fprintf
, NULL
);
1556 fprintf(stderr
, "%.60s\n", graph_dotted_line
);
1559 for (cpu
= 0; cpu
< cpus
->nr
; cpu
++) {
1561 for (thread
= 0; thread
< nthreads
; thread
++) {
1564 if (!evsel
->cgrp
&& !evsel
->system_wide
)
1565 pid
= thread_map__pid(threads
, thread
);
1567 group_fd
= get_group_fd(evsel
, cpu
, thread
);
1569 pr_debug2("sys_perf_event_open: pid %d cpu %d group_fd %d flags %#lx",
1570 pid
, cpus
->map
[cpu
], group_fd
, flags
);
1572 fd
= sys_perf_event_open(&evsel
->attr
, pid
, cpus
->map
[cpu
],
1575 FD(evsel
, cpu
, thread
) = fd
;
1580 if (ignore_missing_thread(evsel
, threads
, thread
, err
)) {
1582 * We just removed 1 thread, so take a step
1583 * back on thread index and lower the upper
1589 /* ... and pretend like nothing have happened. */
1594 pr_debug2("\nsys_perf_event_open failed, error %d\n",
1599 pr_debug2(" = %d\n", fd
);
1601 if (evsel
->bpf_fd
>= 0) {
1603 int bpf_fd
= evsel
->bpf_fd
;
1606 PERF_EVENT_IOC_SET_BPF
,
1608 if (err
&& errno
!= EEXIST
) {
1609 pr_err("failed to attach bpf fd %d: %s\n",
1610 bpf_fd
, strerror(errno
));
1616 set_rlimit
= NO_CHANGE
;
1619 * If we succeeded but had to kill clockid, fail and
1620 * have perf_evsel__open_strerror() print us a nice
1623 if (perf_missing_features
.clockid
||
1624 perf_missing_features
.clockid_wrong
) {
1635 * perf stat needs between 5 and 22 fds per CPU. When we run out
1636 * of them try to increase the limits.
1638 if (err
== -EMFILE
&& set_rlimit
< INCREASED_MAX
) {
1640 int old_errno
= errno
;
1642 if (getrlimit(RLIMIT_NOFILE
, &l
) == 0) {
1643 if (set_rlimit
== NO_CHANGE
)
1644 l
.rlim_cur
= l
.rlim_max
;
1646 l
.rlim_cur
= l
.rlim_max
+ 1000;
1647 l
.rlim_max
= l
.rlim_cur
;
1649 if (setrlimit(RLIMIT_NOFILE
, &l
) == 0) {
1658 if (err
!= -EINVAL
|| cpu
> 0 || thread
> 0)
1662 * Must probe features in the order they were added to the
1663 * perf_event_attr interface.
1665 if (!perf_missing_features
.write_backward
&& evsel
->attr
.write_backward
) {
1666 perf_missing_features
.write_backward
= true;
1668 } else if (!perf_missing_features
.clockid_wrong
&& evsel
->attr
.use_clockid
) {
1669 perf_missing_features
.clockid_wrong
= true;
1670 goto fallback_missing_features
;
1671 } else if (!perf_missing_features
.clockid
&& evsel
->attr
.use_clockid
) {
1672 perf_missing_features
.clockid
= true;
1673 goto fallback_missing_features
;
1674 } else if (!perf_missing_features
.cloexec
&& (flags
& PERF_FLAG_FD_CLOEXEC
)) {
1675 perf_missing_features
.cloexec
= true;
1676 goto fallback_missing_features
;
1677 } else if (!perf_missing_features
.mmap2
&& evsel
->attr
.mmap2
) {
1678 perf_missing_features
.mmap2
= true;
1679 goto fallback_missing_features
;
1680 } else if (!perf_missing_features
.exclude_guest
&&
1681 (evsel
->attr
.exclude_guest
|| evsel
->attr
.exclude_host
)) {
1682 perf_missing_features
.exclude_guest
= true;
1683 goto fallback_missing_features
;
1684 } else if (!perf_missing_features
.sample_id_all
) {
1685 perf_missing_features
.sample_id_all
= true;
1686 goto retry_sample_id
;
1687 } else if (!perf_missing_features
.lbr_flags
&&
1688 (evsel
->attr
.branch_sample_type
&
1689 (PERF_SAMPLE_BRANCH_NO_CYCLES
|
1690 PERF_SAMPLE_BRANCH_NO_FLAGS
))) {
1691 perf_missing_features
.lbr_flags
= true;
1692 goto fallback_missing_features
;
1696 while (--thread
>= 0) {
1697 close(FD(evsel
, cpu
, thread
));
1698 FD(evsel
, cpu
, thread
) = -1;
1701 } while (--cpu
>= 0);
1705 void perf_evsel__close(struct perf_evsel
*evsel
, int ncpus
, int nthreads
)
1707 if (evsel
->fd
== NULL
)
1710 perf_evsel__close_fd(evsel
, ncpus
, nthreads
);
1711 perf_evsel__free_fd(evsel
);
1714 int perf_evsel__open_per_cpu(struct perf_evsel
*evsel
,
1715 struct cpu_map
*cpus
)
1717 return perf_evsel__open(evsel
, cpus
, NULL
);
1720 int perf_evsel__open_per_thread(struct perf_evsel
*evsel
,
1721 struct thread_map
*threads
)
1723 return perf_evsel__open(evsel
, NULL
, threads
);
1726 static int perf_evsel__parse_id_sample(const struct perf_evsel
*evsel
,
1727 const union perf_event
*event
,
1728 struct perf_sample
*sample
)
1730 u64 type
= evsel
->attr
.sample_type
;
1731 const u64
*array
= event
->sample
.array
;
1732 bool swapped
= evsel
->needs_swap
;
1735 array
+= ((event
->header
.size
-
1736 sizeof(event
->header
)) / sizeof(u64
)) - 1;
1738 if (type
& PERF_SAMPLE_IDENTIFIER
) {
1739 sample
->id
= *array
;
1743 if (type
& PERF_SAMPLE_CPU
) {
1746 /* undo swap of u64, then swap on individual u32s */
1747 u
.val64
= bswap_64(u
.val64
);
1748 u
.val32
[0] = bswap_32(u
.val32
[0]);
1751 sample
->cpu
= u
.val32
[0];
1755 if (type
& PERF_SAMPLE_STREAM_ID
) {
1756 sample
->stream_id
= *array
;
1760 if (type
& PERF_SAMPLE_ID
) {
1761 sample
->id
= *array
;
1765 if (type
& PERF_SAMPLE_TIME
) {
1766 sample
->time
= *array
;
1770 if (type
& PERF_SAMPLE_TID
) {
1773 /* undo swap of u64, then swap on individual u32s */
1774 u
.val64
= bswap_64(u
.val64
);
1775 u
.val32
[0] = bswap_32(u
.val32
[0]);
1776 u
.val32
[1] = bswap_32(u
.val32
[1]);
1779 sample
->pid
= u
.val32
[0];
1780 sample
->tid
= u
.val32
[1];
1787 static inline bool overflow(const void *endp
, u16 max_size
, const void *offset
,
1790 return size
> max_size
|| offset
+ size
> endp
;
1793 #define OVERFLOW_CHECK(offset, size, max_size) \
1795 if (overflow(endp, (max_size), (offset), (size))) \
1799 #define OVERFLOW_CHECK_u64(offset) \
1800 OVERFLOW_CHECK(offset, sizeof(u64), sizeof(u64))
1802 int perf_evsel__parse_sample(struct perf_evsel
*evsel
, union perf_event
*event
,
1803 struct perf_sample
*data
)
1805 u64 type
= evsel
->attr
.sample_type
;
1806 bool swapped
= evsel
->needs_swap
;
1808 u16 max_size
= event
->header
.size
;
1809 const void *endp
= (void *)event
+ max_size
;
1813 * used for cross-endian analysis. See git commit 65014ab3
1814 * for why this goofiness is needed.
1818 memset(data
, 0, sizeof(*data
));
1819 data
->cpu
= data
->pid
= data
->tid
= -1;
1820 data
->stream_id
= data
->id
= data
->time
= -1ULL;
1821 data
->period
= evsel
->attr
.sample_period
;
1822 data
->cpumode
= event
->header
.misc
& PERF_RECORD_MISC_CPUMODE_MASK
;
1824 if (event
->header
.type
!= PERF_RECORD_SAMPLE
) {
1825 if (!evsel
->attr
.sample_id_all
)
1827 return perf_evsel__parse_id_sample(evsel
, event
, data
);
1830 array
= event
->sample
.array
;
1833 * The evsel's sample_size is based on PERF_SAMPLE_MASK which includes
1834 * up to PERF_SAMPLE_PERIOD. After that overflow() must be used to
1835 * check the format does not go past the end of the event.
1837 if (evsel
->sample_size
+ sizeof(event
->header
) > event
->header
.size
)
1841 if (type
& PERF_SAMPLE_IDENTIFIER
) {
1846 if (type
& PERF_SAMPLE_IP
) {
1851 if (type
& PERF_SAMPLE_TID
) {
1854 /* undo swap of u64, then swap on individual u32s */
1855 u
.val64
= bswap_64(u
.val64
);
1856 u
.val32
[0] = bswap_32(u
.val32
[0]);
1857 u
.val32
[1] = bswap_32(u
.val32
[1]);
1860 data
->pid
= u
.val32
[0];
1861 data
->tid
= u
.val32
[1];
1865 if (type
& PERF_SAMPLE_TIME
) {
1866 data
->time
= *array
;
1871 if (type
& PERF_SAMPLE_ADDR
) {
1872 data
->addr
= *array
;
1876 if (type
& PERF_SAMPLE_ID
) {
1881 if (type
& PERF_SAMPLE_STREAM_ID
) {
1882 data
->stream_id
= *array
;
1886 if (type
& PERF_SAMPLE_CPU
) {
1890 /* undo swap of u64, then swap on individual u32s */
1891 u
.val64
= bswap_64(u
.val64
);
1892 u
.val32
[0] = bswap_32(u
.val32
[0]);
1895 data
->cpu
= u
.val32
[0];
1899 if (type
& PERF_SAMPLE_PERIOD
) {
1900 data
->period
= *array
;
1904 if (type
& PERF_SAMPLE_READ
) {
1905 u64 read_format
= evsel
->attr
.read_format
;
1907 OVERFLOW_CHECK_u64(array
);
1908 if (read_format
& PERF_FORMAT_GROUP
)
1909 data
->read
.group
.nr
= *array
;
1911 data
->read
.one
.value
= *array
;
1915 if (read_format
& PERF_FORMAT_TOTAL_TIME_ENABLED
) {
1916 OVERFLOW_CHECK_u64(array
);
1917 data
->read
.time_enabled
= *array
;
1921 if (read_format
& PERF_FORMAT_TOTAL_TIME_RUNNING
) {
1922 OVERFLOW_CHECK_u64(array
);
1923 data
->read
.time_running
= *array
;
1927 /* PERF_FORMAT_ID is forced for PERF_SAMPLE_READ */
1928 if (read_format
& PERF_FORMAT_GROUP
) {
1929 const u64 max_group_nr
= UINT64_MAX
/
1930 sizeof(struct sample_read_value
);
1932 if (data
->read
.group
.nr
> max_group_nr
)
1934 sz
= data
->read
.group
.nr
*
1935 sizeof(struct sample_read_value
);
1936 OVERFLOW_CHECK(array
, sz
, max_size
);
1937 data
->read
.group
.values
=
1938 (struct sample_read_value
*)array
;
1939 array
= (void *)array
+ sz
;
1941 OVERFLOW_CHECK_u64(array
);
1942 data
->read
.one
.id
= *array
;
1947 if (type
& PERF_SAMPLE_CALLCHAIN
) {
1948 const u64 max_callchain_nr
= UINT64_MAX
/ sizeof(u64
);
1950 OVERFLOW_CHECK_u64(array
);
1951 data
->callchain
= (struct ip_callchain
*)array
++;
1952 if (data
->callchain
->nr
> max_callchain_nr
)
1954 sz
= data
->callchain
->nr
* sizeof(u64
);
1955 OVERFLOW_CHECK(array
, sz
, max_size
);
1956 array
= (void *)array
+ sz
;
1959 if (type
& PERF_SAMPLE_RAW
) {
1960 OVERFLOW_CHECK_u64(array
);
1962 if (WARN_ONCE(swapped
,
1963 "Endianness of raw data not corrected!\n")) {
1964 /* undo swap of u64, then swap on individual u32s */
1965 u
.val64
= bswap_64(u
.val64
);
1966 u
.val32
[0] = bswap_32(u
.val32
[0]);
1967 u
.val32
[1] = bswap_32(u
.val32
[1]);
1969 data
->raw_size
= u
.val32
[0];
1970 array
= (void *)array
+ sizeof(u32
);
1972 OVERFLOW_CHECK(array
, data
->raw_size
, max_size
);
1973 data
->raw_data
= (void *)array
;
1974 array
= (void *)array
+ data
->raw_size
;
1977 if (type
& PERF_SAMPLE_BRANCH_STACK
) {
1978 const u64 max_branch_nr
= UINT64_MAX
/
1979 sizeof(struct branch_entry
);
1981 OVERFLOW_CHECK_u64(array
);
1982 data
->branch_stack
= (struct branch_stack
*)array
++;
1984 if (data
->branch_stack
->nr
> max_branch_nr
)
1986 sz
= data
->branch_stack
->nr
* sizeof(struct branch_entry
);
1987 OVERFLOW_CHECK(array
, sz
, max_size
);
1988 array
= (void *)array
+ sz
;
1991 if (type
& PERF_SAMPLE_REGS_USER
) {
1992 OVERFLOW_CHECK_u64(array
);
1993 data
->user_regs
.abi
= *array
;
1996 if (data
->user_regs
.abi
) {
1997 u64 mask
= evsel
->attr
.sample_regs_user
;
1999 sz
= hweight_long(mask
) * sizeof(u64
);
2000 OVERFLOW_CHECK(array
, sz
, max_size
);
2001 data
->user_regs
.mask
= mask
;
2002 data
->user_regs
.regs
= (u64
*)array
;
2003 array
= (void *)array
+ sz
;
2007 if (type
& PERF_SAMPLE_STACK_USER
) {
2008 OVERFLOW_CHECK_u64(array
);
2011 data
->user_stack
.offset
= ((char *)(array
- 1)
2015 data
->user_stack
.size
= 0;
2017 OVERFLOW_CHECK(array
, sz
, max_size
);
2018 data
->user_stack
.data
= (char *)array
;
2019 array
= (void *)array
+ sz
;
2020 OVERFLOW_CHECK_u64(array
);
2021 data
->user_stack
.size
= *array
++;
2022 if (WARN_ONCE(data
->user_stack
.size
> sz
,
2023 "user stack dump failure\n"))
2028 if (type
& PERF_SAMPLE_WEIGHT
) {
2029 OVERFLOW_CHECK_u64(array
);
2030 data
->weight
= *array
;
2034 data
->data_src
= PERF_MEM_DATA_SRC_NONE
;
2035 if (type
& PERF_SAMPLE_DATA_SRC
) {
2036 OVERFLOW_CHECK_u64(array
);
2037 data
->data_src
= *array
;
2041 data
->transaction
= 0;
2042 if (type
& PERF_SAMPLE_TRANSACTION
) {
2043 OVERFLOW_CHECK_u64(array
);
2044 data
->transaction
= *array
;
2048 data
->intr_regs
.abi
= PERF_SAMPLE_REGS_ABI_NONE
;
2049 if (type
& PERF_SAMPLE_REGS_INTR
) {
2050 OVERFLOW_CHECK_u64(array
);
2051 data
->intr_regs
.abi
= *array
;
2054 if (data
->intr_regs
.abi
!= PERF_SAMPLE_REGS_ABI_NONE
) {
2055 u64 mask
= evsel
->attr
.sample_regs_intr
;
2057 sz
= hweight_long(mask
) * sizeof(u64
);
2058 OVERFLOW_CHECK(array
, sz
, max_size
);
2059 data
->intr_regs
.mask
= mask
;
2060 data
->intr_regs
.regs
= (u64
*)array
;
2061 array
= (void *)array
+ sz
;
2068 size_t perf_event__sample_event_size(const struct perf_sample
*sample
, u64 type
,
2071 size_t sz
, result
= sizeof(struct sample_event
);
2073 if (type
& PERF_SAMPLE_IDENTIFIER
)
2074 result
+= sizeof(u64
);
2076 if (type
& PERF_SAMPLE_IP
)
2077 result
+= sizeof(u64
);
2079 if (type
& PERF_SAMPLE_TID
)
2080 result
+= sizeof(u64
);
2082 if (type
& PERF_SAMPLE_TIME
)
2083 result
+= sizeof(u64
);
2085 if (type
& PERF_SAMPLE_ADDR
)
2086 result
+= sizeof(u64
);
2088 if (type
& PERF_SAMPLE_ID
)
2089 result
+= sizeof(u64
);
2091 if (type
& PERF_SAMPLE_STREAM_ID
)
2092 result
+= sizeof(u64
);
2094 if (type
& PERF_SAMPLE_CPU
)
2095 result
+= sizeof(u64
);
2097 if (type
& PERF_SAMPLE_PERIOD
)
2098 result
+= sizeof(u64
);
2100 if (type
& PERF_SAMPLE_READ
) {
2101 result
+= sizeof(u64
);
2102 if (read_format
& PERF_FORMAT_TOTAL_TIME_ENABLED
)
2103 result
+= sizeof(u64
);
2104 if (read_format
& PERF_FORMAT_TOTAL_TIME_RUNNING
)
2105 result
+= sizeof(u64
);
2106 /* PERF_FORMAT_ID is forced for PERF_SAMPLE_READ */
2107 if (read_format
& PERF_FORMAT_GROUP
) {
2108 sz
= sample
->read
.group
.nr
*
2109 sizeof(struct sample_read_value
);
2112 result
+= sizeof(u64
);
2116 if (type
& PERF_SAMPLE_CALLCHAIN
) {
2117 sz
= (sample
->callchain
->nr
+ 1) * sizeof(u64
);
2121 if (type
& PERF_SAMPLE_RAW
) {
2122 result
+= sizeof(u32
);
2123 result
+= sample
->raw_size
;
2126 if (type
& PERF_SAMPLE_BRANCH_STACK
) {
2127 sz
= sample
->branch_stack
->nr
* sizeof(struct branch_entry
);
2132 if (type
& PERF_SAMPLE_REGS_USER
) {
2133 if (sample
->user_regs
.abi
) {
2134 result
+= sizeof(u64
);
2135 sz
= hweight_long(sample
->user_regs
.mask
) * sizeof(u64
);
2138 result
+= sizeof(u64
);
2142 if (type
& PERF_SAMPLE_STACK_USER
) {
2143 sz
= sample
->user_stack
.size
;
2144 result
+= sizeof(u64
);
2147 result
+= sizeof(u64
);
2151 if (type
& PERF_SAMPLE_WEIGHT
)
2152 result
+= sizeof(u64
);
2154 if (type
& PERF_SAMPLE_DATA_SRC
)
2155 result
+= sizeof(u64
);
2157 if (type
& PERF_SAMPLE_TRANSACTION
)
2158 result
+= sizeof(u64
);
2160 if (type
& PERF_SAMPLE_REGS_INTR
) {
2161 if (sample
->intr_regs
.abi
) {
2162 result
+= sizeof(u64
);
2163 sz
= hweight_long(sample
->intr_regs
.mask
) * sizeof(u64
);
2166 result
+= sizeof(u64
);
2173 int perf_event__synthesize_sample(union perf_event
*event
, u64 type
,
2175 const struct perf_sample
*sample
,
2181 * used for cross-endian analysis. See git commit 65014ab3
2182 * for why this goofiness is needed.
2186 array
= event
->sample
.array
;
2188 if (type
& PERF_SAMPLE_IDENTIFIER
) {
2189 *array
= sample
->id
;
2193 if (type
& PERF_SAMPLE_IP
) {
2194 *array
= sample
->ip
;
2198 if (type
& PERF_SAMPLE_TID
) {
2199 u
.val32
[0] = sample
->pid
;
2200 u
.val32
[1] = sample
->tid
;
2203 * Inverse of what is done in perf_evsel__parse_sample
2205 u
.val32
[0] = bswap_32(u
.val32
[0]);
2206 u
.val32
[1] = bswap_32(u
.val32
[1]);
2207 u
.val64
= bswap_64(u
.val64
);
2214 if (type
& PERF_SAMPLE_TIME
) {
2215 *array
= sample
->time
;
2219 if (type
& PERF_SAMPLE_ADDR
) {
2220 *array
= sample
->addr
;
2224 if (type
& PERF_SAMPLE_ID
) {
2225 *array
= sample
->id
;
2229 if (type
& PERF_SAMPLE_STREAM_ID
) {
2230 *array
= sample
->stream_id
;
2234 if (type
& PERF_SAMPLE_CPU
) {
2235 u
.val32
[0] = sample
->cpu
;
2238 * Inverse of what is done in perf_evsel__parse_sample
2240 u
.val32
[0] = bswap_32(u
.val32
[0]);
2241 u
.val64
= bswap_64(u
.val64
);
2247 if (type
& PERF_SAMPLE_PERIOD
) {
2248 *array
= sample
->period
;
2252 if (type
& PERF_SAMPLE_READ
) {
2253 if (read_format
& PERF_FORMAT_GROUP
)
2254 *array
= sample
->read
.group
.nr
;
2256 *array
= sample
->read
.one
.value
;
2259 if (read_format
& PERF_FORMAT_TOTAL_TIME_ENABLED
) {
2260 *array
= sample
->read
.time_enabled
;
2264 if (read_format
& PERF_FORMAT_TOTAL_TIME_RUNNING
) {
2265 *array
= sample
->read
.time_running
;
2269 /* PERF_FORMAT_ID is forced for PERF_SAMPLE_READ */
2270 if (read_format
& PERF_FORMAT_GROUP
) {
2271 sz
= sample
->read
.group
.nr
*
2272 sizeof(struct sample_read_value
);
2273 memcpy(array
, sample
->read
.group
.values
, sz
);
2274 array
= (void *)array
+ sz
;
2276 *array
= sample
->read
.one
.id
;
2281 if (type
& PERF_SAMPLE_CALLCHAIN
) {
2282 sz
= (sample
->callchain
->nr
+ 1) * sizeof(u64
);
2283 memcpy(array
, sample
->callchain
, sz
);
2284 array
= (void *)array
+ sz
;
2287 if (type
& PERF_SAMPLE_RAW
) {
2288 u
.val32
[0] = sample
->raw_size
;
2289 if (WARN_ONCE(swapped
,
2290 "Endianness of raw data not corrected!\n")) {
2292 * Inverse of what is done in perf_evsel__parse_sample
2294 u
.val32
[0] = bswap_32(u
.val32
[0]);
2295 u
.val32
[1] = bswap_32(u
.val32
[1]);
2296 u
.val64
= bswap_64(u
.val64
);
2299 array
= (void *)array
+ sizeof(u32
);
2301 memcpy(array
, sample
->raw_data
, sample
->raw_size
);
2302 array
= (void *)array
+ sample
->raw_size
;
2305 if (type
& PERF_SAMPLE_BRANCH_STACK
) {
2306 sz
= sample
->branch_stack
->nr
* sizeof(struct branch_entry
);
2308 memcpy(array
, sample
->branch_stack
, sz
);
2309 array
= (void *)array
+ sz
;
2312 if (type
& PERF_SAMPLE_REGS_USER
) {
2313 if (sample
->user_regs
.abi
) {
2314 *array
++ = sample
->user_regs
.abi
;
2315 sz
= hweight_long(sample
->user_regs
.mask
) * sizeof(u64
);
2316 memcpy(array
, sample
->user_regs
.regs
, sz
);
2317 array
= (void *)array
+ sz
;
2323 if (type
& PERF_SAMPLE_STACK_USER
) {
2324 sz
= sample
->user_stack
.size
;
2327 memcpy(array
, sample
->user_stack
.data
, sz
);
2328 array
= (void *)array
+ sz
;
2333 if (type
& PERF_SAMPLE_WEIGHT
) {
2334 *array
= sample
->weight
;
2338 if (type
& PERF_SAMPLE_DATA_SRC
) {
2339 *array
= sample
->data_src
;
2343 if (type
& PERF_SAMPLE_TRANSACTION
) {
2344 *array
= sample
->transaction
;
2348 if (type
& PERF_SAMPLE_REGS_INTR
) {
2349 if (sample
->intr_regs
.abi
) {
2350 *array
++ = sample
->intr_regs
.abi
;
2351 sz
= hweight_long(sample
->intr_regs
.mask
) * sizeof(u64
);
2352 memcpy(array
, sample
->intr_regs
.regs
, sz
);
2353 array
= (void *)array
+ sz
;
2362 struct format_field
*perf_evsel__field(struct perf_evsel
*evsel
, const char *name
)
2364 return pevent_find_field(evsel
->tp_format
, name
);
2367 void *perf_evsel__rawptr(struct perf_evsel
*evsel
, struct perf_sample
*sample
,
2370 struct format_field
*field
= perf_evsel__field(evsel
, name
);
2376 offset
= field
->offset
;
2378 if (field
->flags
& FIELD_IS_DYNAMIC
) {
2379 offset
= *(int *)(sample
->raw_data
+ field
->offset
);
2383 return sample
->raw_data
+ offset
;
2386 u64
format_field__intval(struct format_field
*field
, struct perf_sample
*sample
,
2390 void *ptr
= sample
->raw_data
+ field
->offset
;
2392 switch (field
->size
) {
2396 value
= *(u16
*)ptr
;
2399 value
= *(u32
*)ptr
;
2402 memcpy(&value
, ptr
, sizeof(u64
));
2411 switch (field
->size
) {
2413 return bswap_16(value
);
2415 return bswap_32(value
);
2417 return bswap_64(value
);
2425 u64
perf_evsel__intval(struct perf_evsel
*evsel
, struct perf_sample
*sample
,
2428 struct format_field
*field
= perf_evsel__field(evsel
, name
);
2433 return field
? format_field__intval(field
, sample
, evsel
->needs_swap
) : 0;
2436 bool perf_evsel__fallback(struct perf_evsel
*evsel
, int err
,
2437 char *msg
, size_t msgsize
)
2441 if ((err
== ENOENT
|| err
== ENXIO
|| err
== ENODEV
) &&
2442 evsel
->attr
.type
== PERF_TYPE_HARDWARE
&&
2443 evsel
->attr
.config
== PERF_COUNT_HW_CPU_CYCLES
) {
2445 * If it's cycles then fall back to hrtimer based
2446 * cpu-clock-tick sw counter, which is always available even if
2449 * PPC returns ENXIO until 2.6.37 (behavior changed with commit
2452 scnprintf(msg
, msgsize
, "%s",
2453 "The cycles event is not supported, trying to fall back to cpu-clock-ticks");
2455 evsel
->attr
.type
= PERF_TYPE_SOFTWARE
;
2456 evsel
->attr
.config
= PERF_COUNT_SW_CPU_CLOCK
;
2458 zfree(&evsel
->name
);
2460 } else if (err
== EACCES
&& !evsel
->attr
.exclude_kernel
&&
2461 (paranoid
= perf_event_paranoid()) > 1) {
2462 const char *name
= perf_evsel__name(evsel
);
2465 if (asprintf(&new_name
, "%s%su", name
, strchr(name
, ':') ? "" : ":") < 0)
2470 evsel
->name
= new_name
;
2471 scnprintf(msg
, msgsize
,
2472 "kernel.perf_event_paranoid=%d, trying to fall back to excluding kernel samples", paranoid
);
2473 evsel
->attr
.exclude_kernel
= 1;
2481 static bool find_process(const char *name
)
2483 size_t len
= strlen(name
);
2488 dir
= opendir(procfs__mountpoint());
2492 /* Walk through the directory. */
2493 while (ret
&& (d
= readdir(dir
)) != NULL
) {
2494 char path
[PATH_MAX
];
2498 if ((d
->d_type
!= DT_DIR
) ||
2499 !strcmp(".", d
->d_name
) ||
2500 !strcmp("..", d
->d_name
))
2503 scnprintf(path
, sizeof(path
), "%s/%s/comm",
2504 procfs__mountpoint(), d
->d_name
);
2506 if (filename__read_str(path
, &data
, &size
))
2509 ret
= strncmp(name
, data
, len
);
2514 return ret
? false : true;
2517 int perf_evsel__open_strerror(struct perf_evsel
*evsel
, struct target
*target
,
2518 int err
, char *msg
, size_t size
)
2520 char sbuf
[STRERR_BUFSIZE
];
2527 printed
= scnprintf(msg
, size
,
2528 "No permission to enable %s event.\n\n",
2529 perf_evsel__name(evsel
));
2531 return scnprintf(msg
+ printed
, size
- printed
,
2532 "You may not have permission to collect %sstats.\n\n"
2533 "Consider tweaking /proc/sys/kernel/perf_event_paranoid,\n"
2534 "which controls use of the performance events system by\n"
2535 "unprivileged users (without CAP_SYS_ADMIN).\n\n"
2536 "The current value is %d:\n\n"
2537 " -1: Allow use of (almost) all events by all users\n"
2538 ">= 0: Disallow raw tracepoint access by users without CAP_IOC_LOCK\n"
2539 ">= 1: Disallow CPU event access by users without CAP_SYS_ADMIN\n"
2540 ">= 2: Disallow kernel profiling by users without CAP_SYS_ADMIN\n\n"
2541 "To make this setting permanent, edit /etc/sysctl.conf too, e.g.:\n\n"
2542 " kernel.perf_event_paranoid = -1\n" ,
2543 target
->system_wide
? "system-wide " : "",
2544 perf_event_paranoid());
2546 return scnprintf(msg
, size
, "The %s event is not supported.",
2547 perf_evsel__name(evsel
));
2549 return scnprintf(msg
, size
, "%s",
2550 "Too many events are opened.\n"
2551 "Probably the maximum number of open file descriptors has been reached.\n"
2552 "Hint: Try again after reducing the number of events.\n"
2553 "Hint: Try increasing the limit with 'ulimit -n <limit>'");
2555 if ((evsel
->attr
.sample_type
& PERF_SAMPLE_CALLCHAIN
) != 0 &&
2556 access("/proc/sys/kernel/perf_event_max_stack", F_OK
) == 0)
2557 return scnprintf(msg
, size
,
2558 "Not enough memory to setup event with callchain.\n"
2559 "Hint: Try tweaking /proc/sys/kernel/perf_event_max_stack\n"
2560 "Hint: Current value: %d", sysctl_perf_event_max_stack
);
2563 if (target
->cpu_list
)
2564 return scnprintf(msg
, size
, "%s",
2565 "No such device - did you specify an out-of-range profile CPU?");
2568 if (evsel
->attr
.sample_period
!= 0)
2569 return scnprintf(msg
, size
, "%s",
2570 "PMU Hardware doesn't support sampling/overflow-interrupts.");
2571 if (evsel
->attr
.precise_ip
)
2572 return scnprintf(msg
, size
, "%s",
2573 "\'precise\' request may not be supported. Try removing 'p' modifier.");
2574 #if defined(__i386__) || defined(__x86_64__)
2575 if (evsel
->attr
.type
== PERF_TYPE_HARDWARE
)
2576 return scnprintf(msg
, size
, "%s",
2577 "No hardware sampling interrupt available.\n"
2578 "No APIC? If so then you can boot the kernel with the \"lapic\" boot parameter to force-enable it.");
2582 if (find_process("oprofiled"))
2583 return scnprintf(msg
, size
,
2584 "The PMU counters are busy/taken by another profiler.\n"
2585 "We found oprofile daemon running, please stop it and try again.");
2588 if (evsel
->attr
.write_backward
&& perf_missing_features
.write_backward
)
2589 return scnprintf(msg
, size
, "Reading from overwrite event is not supported by this kernel.");
2590 if (perf_missing_features
.clockid
)
2591 return scnprintf(msg
, size
, "clockid feature not supported.");
2592 if (perf_missing_features
.clockid_wrong
)
2593 return scnprintf(msg
, size
, "wrong clockid (%d).", clockid
);
2599 return scnprintf(msg
, size
,
2600 "The sys_perf_event_open() syscall returned with %d (%s) for event (%s).\n"
2601 "/bin/dmesg may provide additional information.\n"
2602 "No CONFIG_PERF_EVENTS=y kernel support configured?",
2603 err
, str_error_r(err
, sbuf
, sizeof(sbuf
)),
2604 perf_evsel__name(evsel
));
2607 char *perf_evsel__env_arch(struct perf_evsel
*evsel
)
2609 if (evsel
&& evsel
->evlist
&& evsel
->evlist
->env
)
2610 return evsel
->evlist
->env
->arch
;