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/tracing_path.h>
15 #include <traceevent/event-parse.h>
16 #include <linux/hw_breakpoint.h>
17 #include <linux/perf_event.h>
18 #include <linux/err.h>
19 #include <sys/ioctl.h>
20 #include <sys/resource.h>
22 #include "callchain.h"
29 #include "thread_map.h"
31 #include "perf_regs.h"
33 #include "trace-event.h"
35 #include "util/parse-branch-options.h"
37 #include "sane_ctype.h"
48 } perf_missing_features;
50 static clockid_t clockid;
52 static int perf_evsel__no_extra_init(struct perf_evsel *evsel __maybe_unused)
57 static void perf_evsel__no_extra_fini(struct perf_evsel *evsel __maybe_unused)
63 int (*init)(struct perf_evsel *evsel);
64 void (*fini)(struct perf_evsel *evsel);
65 } perf_evsel__object = {
66 .size = sizeof(struct perf_evsel),
67 .init = perf_evsel__no_extra_init,
68 .fini = perf_evsel__no_extra_fini,
71 int perf_evsel__object_config(size_t object_size,
72 int (*init)(struct perf_evsel *evsel),
73 void (*fini)(struct perf_evsel *evsel))
79 if (perf_evsel__object.size > object_size)
82 perf_evsel__object.size = object_size;
86 perf_evsel__object.init = init;
89 perf_evsel__object.fini = fini;
94 #define FD(e, x, y) (*(int *)xyarray__entry(e->fd, x, y))
96 int __perf_evsel__sample_size(u64 sample_type)
98 u64 mask = sample_type & PERF_SAMPLE_MASK;
102 for (i = 0; i < 64; i++) {
103 if (mask & (1ULL << i))
113 * __perf_evsel__calc_id_pos - calculate id_pos.
114 * @sample_type: sample type
116 * This function returns the position of the event id (PERF_SAMPLE_ID or
117 * PERF_SAMPLE_IDENTIFIER) in a sample event i.e. in the array of struct
120 static int __perf_evsel__calc_id_pos(u64 sample_type)
124 if (sample_type & PERF_SAMPLE_IDENTIFIER)
127 if (!(sample_type & PERF_SAMPLE_ID))
130 if (sample_type & PERF_SAMPLE_IP)
133 if (sample_type & PERF_SAMPLE_TID)
136 if (sample_type & PERF_SAMPLE_TIME)
139 if (sample_type & PERF_SAMPLE_ADDR)
146 * __perf_evsel__calc_is_pos - calculate is_pos.
147 * @sample_type: sample type
149 * This function returns the position (counting backwards) of the event id
150 * (PERF_SAMPLE_ID or PERF_SAMPLE_IDENTIFIER) in a non-sample event i.e. if
151 * sample_id_all is used there is an id sample appended to non-sample events.
153 static int __perf_evsel__calc_is_pos(u64 sample_type)
157 if (sample_type & PERF_SAMPLE_IDENTIFIER)
160 if (!(sample_type & PERF_SAMPLE_ID))
163 if (sample_type & PERF_SAMPLE_CPU)
166 if (sample_type & PERF_SAMPLE_STREAM_ID)
172 void perf_evsel__calc_id_pos(struct perf_evsel *evsel)
174 evsel->id_pos = __perf_evsel__calc_id_pos(evsel->attr.sample_type);
175 evsel->is_pos = __perf_evsel__calc_is_pos(evsel->attr.sample_type);
178 void __perf_evsel__set_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__reset_sample_bit(struct perf_evsel *evsel,
189 enum perf_event_sample_format bit)
191 if (evsel->attr.sample_type & bit) {
192 evsel->attr.sample_type &= ~bit;
193 evsel->sample_size -= sizeof(u64);
194 perf_evsel__calc_id_pos(evsel);
198 void perf_evsel__set_sample_id(struct perf_evsel *evsel,
199 bool can_sample_identifier)
201 if (can_sample_identifier) {
202 perf_evsel__reset_sample_bit(evsel, ID);
203 perf_evsel__set_sample_bit(evsel, IDENTIFIER);
205 perf_evsel__set_sample_bit(evsel, ID);
207 evsel->attr.read_format |= PERF_FORMAT_ID;
211 * perf_evsel__is_function_event - Return whether given evsel is a function
214 * @evsel - evsel selector to be tested
216 * Return %true if event is function trace event
218 bool perf_evsel__is_function_event(struct perf_evsel *evsel)
220 #define FUNCTION_EVENT "ftrace:function"
222 return evsel->name &&
223 !strncmp(FUNCTION_EVENT, evsel->name, sizeof(FUNCTION_EVENT));
225 #undef FUNCTION_EVENT
228 void perf_evsel__init(struct perf_evsel *evsel,
229 struct perf_event_attr *attr, int idx)
232 evsel->tracking = !idx;
234 evsel->leader = evsel;
237 evsel->evlist = NULL;
239 INIT_LIST_HEAD(&evsel->node);
240 INIT_LIST_HEAD(&evsel->config_terms);
241 perf_evsel__object.init(evsel);
242 evsel->sample_size = __perf_evsel__sample_size(attr->sample_type);
243 perf_evsel__calc_id_pos(evsel);
244 evsel->cmdline_group_boundary = false;
245 evsel->metric_expr = NULL;
246 evsel->metric_name = NULL;
247 evsel->metric_events = NULL;
248 evsel->collect_stat = false;
251 struct perf_evsel *perf_evsel__new_idx(struct perf_event_attr *attr, int idx)
253 struct perf_evsel *evsel = zalloc(perf_evsel__object.size);
256 perf_evsel__init(evsel, attr, idx);
258 if (perf_evsel__is_bpf_output(evsel)) {
259 evsel->attr.sample_type |= (PERF_SAMPLE_RAW | PERF_SAMPLE_TIME |
260 PERF_SAMPLE_CPU | PERF_SAMPLE_PERIOD),
261 evsel->attr.sample_period = 1;
267 struct perf_evsel *perf_evsel__new_cycles(void)
269 struct perf_event_attr attr = {
270 .type = PERF_TYPE_HARDWARE,
271 .config = PERF_COUNT_HW_CPU_CYCLES,
273 struct perf_evsel *evsel;
275 event_attr_init(&attr);
277 * Unnamed union member, not supported as struct member named
278 * initializer in older compilers such as gcc 4.4.7
280 * Just for probing the precise_ip:
282 attr.sample_period = 1;
284 perf_event_attr__set_max_precise_ip(&attr);
286 * Now let the usual logic to set up the perf_event_attr defaults
287 * to kick in when we return and before perf_evsel__open() is called.
289 attr.sample_period = 0;
291 evsel = perf_evsel__new(&attr);
295 /* use asprintf() because free(evsel) assumes name is allocated */
296 if (asprintf(&evsel->name, "cycles%.*s",
297 attr.precise_ip ? attr.precise_ip + 1 : 0, ":ppp") < 0)
302 perf_evsel__delete(evsel);
308 * Returns pointer with encoded error via <linux/err.h> interface.
310 struct perf_evsel *perf_evsel__newtp_idx(const char *sys, const char *name, int idx)
312 struct perf_evsel *evsel = zalloc(perf_evsel__object.size);
318 struct perf_event_attr attr = {
319 .type = PERF_TYPE_TRACEPOINT,
320 .sample_type = (PERF_SAMPLE_RAW | PERF_SAMPLE_TIME |
321 PERF_SAMPLE_CPU | PERF_SAMPLE_PERIOD),
324 if (asprintf(&evsel->name, "%s:%s", sys, name) < 0)
327 evsel->tp_format = trace_event__tp_format(sys, name);
328 if (IS_ERR(evsel->tp_format)) {
329 err = PTR_ERR(evsel->tp_format);
333 event_attr_init(&attr);
334 attr.config = evsel->tp_format->id;
335 attr.sample_period = 1;
336 perf_evsel__init(evsel, &attr, idx);
348 const char *perf_evsel__hw_names[PERF_COUNT_HW_MAX] = {
356 "stalled-cycles-frontend",
357 "stalled-cycles-backend",
361 static const char *__perf_evsel__hw_name(u64 config)
363 if (config < PERF_COUNT_HW_MAX && perf_evsel__hw_names[config])
364 return perf_evsel__hw_names[config];
366 return "unknown-hardware";
369 static int perf_evsel__add_modifiers(struct perf_evsel *evsel, char *bf, size_t size)
371 int colon = 0, r = 0;
372 struct perf_event_attr *attr = &evsel->attr;
373 bool exclude_guest_default = false;
375 #define MOD_PRINT(context, mod) do { \
376 if (!attr->exclude_##context) { \
377 if (!colon) colon = ++r; \
378 r += scnprintf(bf + r, size - r, "%c", mod); \
381 if (attr->exclude_kernel || attr->exclude_user || attr->exclude_hv) {
382 MOD_PRINT(kernel, 'k');
383 MOD_PRINT(user, 'u');
385 exclude_guest_default = true;
388 if (attr->precise_ip) {
391 r += scnprintf(bf + r, size - r, "%.*s", attr->precise_ip, "ppp");
392 exclude_guest_default = true;
395 if (attr->exclude_host || attr->exclude_guest == exclude_guest_default) {
396 MOD_PRINT(host, 'H');
397 MOD_PRINT(guest, 'G');
405 static int perf_evsel__hw_name(struct perf_evsel *evsel, char *bf, size_t size)
407 int r = scnprintf(bf, size, "%s", __perf_evsel__hw_name(evsel->attr.config));
408 return r + perf_evsel__add_modifiers(evsel, bf + r, size - r);
411 const char *perf_evsel__sw_names[PERF_COUNT_SW_MAX] = {
424 static const char *__perf_evsel__sw_name(u64 config)
426 if (config < PERF_COUNT_SW_MAX && perf_evsel__sw_names[config])
427 return perf_evsel__sw_names[config];
428 return "unknown-software";
431 static int perf_evsel__sw_name(struct perf_evsel *evsel, char *bf, size_t size)
433 int r = scnprintf(bf, size, "%s", __perf_evsel__sw_name(evsel->attr.config));
434 return r + perf_evsel__add_modifiers(evsel, bf + r, size - r);
437 static int __perf_evsel__bp_name(char *bf, size_t size, u64 addr, u64 type)
441 r = scnprintf(bf, size, "mem:0x%" PRIx64 ":", addr);
443 if (type & HW_BREAKPOINT_R)
444 r += scnprintf(bf + r, size - r, "r");
446 if (type & HW_BREAKPOINT_W)
447 r += scnprintf(bf + r, size - r, "w");
449 if (type & HW_BREAKPOINT_X)
450 r += scnprintf(bf + r, size - r, "x");
455 static int perf_evsel__bp_name(struct perf_evsel *evsel, char *bf, size_t size)
457 struct perf_event_attr *attr = &evsel->attr;
458 int r = __perf_evsel__bp_name(bf, size, attr->bp_addr, attr->bp_type);
459 return r + perf_evsel__add_modifiers(evsel, bf + r, size - r);
462 const char *perf_evsel__hw_cache[PERF_COUNT_HW_CACHE_MAX]
463 [PERF_EVSEL__MAX_ALIASES] = {
464 { "L1-dcache", "l1-d", "l1d", "L1-data", },
465 { "L1-icache", "l1-i", "l1i", "L1-instruction", },
467 { "dTLB", "d-tlb", "Data-TLB", },
468 { "iTLB", "i-tlb", "Instruction-TLB", },
469 { "branch", "branches", "bpu", "btb", "bpc", },
473 const char *perf_evsel__hw_cache_op[PERF_COUNT_HW_CACHE_OP_MAX]
474 [PERF_EVSEL__MAX_ALIASES] = {
475 { "load", "loads", "read", },
476 { "store", "stores", "write", },
477 { "prefetch", "prefetches", "speculative-read", "speculative-load", },
480 const char *perf_evsel__hw_cache_result[PERF_COUNT_HW_CACHE_RESULT_MAX]
481 [PERF_EVSEL__MAX_ALIASES] = {
482 { "refs", "Reference", "ops", "access", },
483 { "misses", "miss", },
486 #define C(x) PERF_COUNT_HW_CACHE_##x
487 #define CACHE_READ (1 << C(OP_READ))
488 #define CACHE_WRITE (1 << C(OP_WRITE))
489 #define CACHE_PREFETCH (1 << C(OP_PREFETCH))
490 #define COP(x) (1 << x)
493 * cache operartion stat
494 * L1I : Read and prefetch only
495 * ITLB and BPU : Read-only
497 static unsigned long perf_evsel__hw_cache_stat[C(MAX)] = {
498 [C(L1D)] = (CACHE_READ | CACHE_WRITE | CACHE_PREFETCH),
499 [C(L1I)] = (CACHE_READ | CACHE_PREFETCH),
500 [C(LL)] = (CACHE_READ | CACHE_WRITE | CACHE_PREFETCH),
501 [C(DTLB)] = (CACHE_READ | CACHE_WRITE | CACHE_PREFETCH),
502 [C(ITLB)] = (CACHE_READ),
503 [C(BPU)] = (CACHE_READ),
504 [C(NODE)] = (CACHE_READ | CACHE_WRITE | CACHE_PREFETCH),
507 bool perf_evsel__is_cache_op_valid(u8 type, u8 op)
509 if (perf_evsel__hw_cache_stat[type] & COP(op))
510 return true; /* valid */
512 return false; /* invalid */
515 int __perf_evsel__hw_cache_type_op_res_name(u8 type, u8 op, u8 result,
516 char *bf, size_t size)
519 return scnprintf(bf, size, "%s-%s-%s", perf_evsel__hw_cache[type][0],
520 perf_evsel__hw_cache_op[op][0],
521 perf_evsel__hw_cache_result[result][0]);
524 return scnprintf(bf, size, "%s-%s", perf_evsel__hw_cache[type][0],
525 perf_evsel__hw_cache_op[op][1]);
528 static int __perf_evsel__hw_cache_name(u64 config, char *bf, size_t size)
530 u8 op, result, type = (config >> 0) & 0xff;
531 const char *err = "unknown-ext-hardware-cache-type";
533 if (type >= PERF_COUNT_HW_CACHE_MAX)
536 op = (config >> 8) & 0xff;
537 err = "unknown-ext-hardware-cache-op";
538 if (op >= PERF_COUNT_HW_CACHE_OP_MAX)
541 result = (config >> 16) & 0xff;
542 err = "unknown-ext-hardware-cache-result";
543 if (result >= PERF_COUNT_HW_CACHE_RESULT_MAX)
546 err = "invalid-cache";
547 if (!perf_evsel__is_cache_op_valid(type, op))
550 return __perf_evsel__hw_cache_type_op_res_name(type, op, result, bf, size);
552 return scnprintf(bf, size, "%s", err);
555 static int perf_evsel__hw_cache_name(struct perf_evsel *evsel, char *bf, size_t size)
557 int ret = __perf_evsel__hw_cache_name(evsel->attr.config, bf, size);
558 return ret + perf_evsel__add_modifiers(evsel, bf + ret, size - ret);
561 static int perf_evsel__raw_name(struct perf_evsel *evsel, char *bf, size_t size)
563 int ret = scnprintf(bf, size, "raw 0x%" PRIx64, evsel->attr.config);
564 return ret + perf_evsel__add_modifiers(evsel, bf + ret, size - ret);
567 const char *perf_evsel__name(struct perf_evsel *evsel)
574 switch (evsel->attr.type) {
576 perf_evsel__raw_name(evsel, bf, sizeof(bf));
579 case PERF_TYPE_HARDWARE:
580 perf_evsel__hw_name(evsel, bf, sizeof(bf));
583 case PERF_TYPE_HW_CACHE:
584 perf_evsel__hw_cache_name(evsel, bf, sizeof(bf));
587 case PERF_TYPE_SOFTWARE:
588 perf_evsel__sw_name(evsel, bf, sizeof(bf));
591 case PERF_TYPE_TRACEPOINT:
592 scnprintf(bf, sizeof(bf), "%s", "unknown tracepoint");
595 case PERF_TYPE_BREAKPOINT:
596 perf_evsel__bp_name(evsel, bf, sizeof(bf));
600 scnprintf(bf, sizeof(bf), "unknown attr type: %d",
605 evsel->name = strdup(bf);
607 return evsel->name ?: "unknown";
610 const char *perf_evsel__group_name(struct perf_evsel *evsel)
612 return evsel->group_name ?: "anon group";
615 int perf_evsel__group_desc(struct perf_evsel *evsel, char *buf, size_t size)
618 struct perf_evsel *pos;
619 const char *group_name = perf_evsel__group_name(evsel);
621 ret = scnprintf(buf, size, "%s", group_name);
623 ret += scnprintf(buf + ret, size - ret, " { %s",
624 perf_evsel__name(evsel));
626 for_each_group_member(pos, evsel)
627 ret += scnprintf(buf + ret, size - ret, ", %s",
628 perf_evsel__name(pos));
630 ret += scnprintf(buf + ret, size - ret, " }");
635 void perf_evsel__config_callchain(struct perf_evsel *evsel,
636 struct record_opts *opts,
637 struct callchain_param *param)
639 bool function = perf_evsel__is_function_event(evsel);
640 struct perf_event_attr *attr = &evsel->attr;
642 perf_evsel__set_sample_bit(evsel, CALLCHAIN);
644 attr->sample_max_stack = param->max_stack;
646 if (param->record_mode == CALLCHAIN_LBR) {
647 if (!opts->branch_stack) {
648 if (attr->exclude_user) {
649 pr_warning("LBR callstack option is only available "
650 "to get user callchain information. "
651 "Falling back to framepointers.\n");
653 perf_evsel__set_sample_bit(evsel, BRANCH_STACK);
654 attr->branch_sample_type = PERF_SAMPLE_BRANCH_USER |
655 PERF_SAMPLE_BRANCH_CALL_STACK |
656 PERF_SAMPLE_BRANCH_NO_CYCLES |
657 PERF_SAMPLE_BRANCH_NO_FLAGS;
660 pr_warning("Cannot use LBR callstack with branch stack. "
661 "Falling back to framepointers.\n");
664 if (param->record_mode == CALLCHAIN_DWARF) {
666 perf_evsel__set_sample_bit(evsel, REGS_USER);
667 perf_evsel__set_sample_bit(evsel, STACK_USER);
668 attr->sample_regs_user = PERF_REGS_MASK;
669 attr->sample_stack_user = param->dump_size;
670 attr->exclude_callchain_user = 1;
672 pr_info("Cannot use DWARF unwind for function trace event,"
673 " falling back to framepointers.\n");
678 pr_info("Disabling user space callchains for function trace event.\n");
679 attr->exclude_callchain_user = 1;
684 perf_evsel__reset_callgraph(struct perf_evsel *evsel,
685 struct callchain_param *param)
687 struct perf_event_attr *attr = &evsel->attr;
689 perf_evsel__reset_sample_bit(evsel, CALLCHAIN);
690 if (param->record_mode == CALLCHAIN_LBR) {
691 perf_evsel__reset_sample_bit(evsel, BRANCH_STACK);
692 attr->branch_sample_type &= ~(PERF_SAMPLE_BRANCH_USER |
693 PERF_SAMPLE_BRANCH_CALL_STACK);
695 if (param->record_mode == CALLCHAIN_DWARF) {
696 perf_evsel__reset_sample_bit(evsel, REGS_USER);
697 perf_evsel__reset_sample_bit(evsel, STACK_USER);
701 static void apply_config_terms(struct perf_evsel *evsel,
702 struct record_opts *opts)
704 struct perf_evsel_config_term *term;
705 struct list_head *config_terms = &evsel->config_terms;
706 struct perf_event_attr *attr = &evsel->attr;
707 struct callchain_param param;
710 const char *callgraph_buf = NULL;
712 /* callgraph default */
713 param.record_mode = callchain_param.record_mode;
715 list_for_each_entry(term, config_terms, list) {
716 switch (term->type) {
717 case PERF_EVSEL__CONFIG_TERM_PERIOD:
718 attr->sample_period = term->val.period;
721 case PERF_EVSEL__CONFIG_TERM_FREQ:
722 attr->sample_freq = term->val.freq;
725 case PERF_EVSEL__CONFIG_TERM_TIME:
727 perf_evsel__set_sample_bit(evsel, TIME);
729 perf_evsel__reset_sample_bit(evsel, TIME);
731 case PERF_EVSEL__CONFIG_TERM_CALLGRAPH:
732 callgraph_buf = term->val.callgraph;
734 case PERF_EVSEL__CONFIG_TERM_BRANCH:
735 if (term->val.branch && strcmp(term->val.branch, "no")) {
736 perf_evsel__set_sample_bit(evsel, BRANCH_STACK);
737 parse_branch_str(term->val.branch,
738 &attr->branch_sample_type);
740 perf_evsel__reset_sample_bit(evsel, BRANCH_STACK);
742 case PERF_EVSEL__CONFIG_TERM_STACK_USER:
743 dump_size = term->val.stack_user;
745 case PERF_EVSEL__CONFIG_TERM_MAX_STACK:
746 max_stack = term->val.max_stack;
748 case PERF_EVSEL__CONFIG_TERM_INHERIT:
750 * attr->inherit should has already been set by
751 * perf_evsel__config. If user explicitly set
752 * inherit using config terms, override global
753 * opt->no_inherit setting.
755 attr->inherit = term->val.inherit ? 1 : 0;
757 case PERF_EVSEL__CONFIG_TERM_OVERWRITE:
758 attr->write_backward = term->val.overwrite ? 1 : 0;
765 /* User explicitly set per-event callgraph, clear the old setting and reset. */
766 if ((callgraph_buf != NULL) || (dump_size > 0) || max_stack) {
768 param.max_stack = max_stack;
769 if (callgraph_buf == NULL)
770 callgraph_buf = "fp";
773 /* parse callgraph parameters */
774 if (callgraph_buf != NULL) {
775 if (!strcmp(callgraph_buf, "no")) {
776 param.enabled = false;
777 param.record_mode = CALLCHAIN_NONE;
779 param.enabled = true;
780 if (parse_callchain_record(callgraph_buf, ¶m)) {
781 pr_err("per-event callgraph setting for %s failed. "
782 "Apply callgraph global setting for it\n",
789 dump_size = round_up(dump_size, sizeof(u64));
790 param.dump_size = dump_size;
793 /* If global callgraph set, clear it */
794 if (callchain_param.enabled)
795 perf_evsel__reset_callgraph(evsel, &callchain_param);
797 /* set perf-event callgraph */
799 perf_evsel__config_callchain(evsel, opts, ¶m);
804 * The enable_on_exec/disabled value strategy:
806 * 1) For any type of traced program:
807 * - all independent events and group leaders are disabled
808 * - all group members are enabled
810 * Group members are ruled by group leaders. They need to
811 * be enabled, because the group scheduling relies on that.
813 * 2) For traced programs executed by perf:
814 * - all independent events and group leaders have
816 * - we don't specifically enable or disable any event during
819 * Independent events and group leaders are initially disabled
820 * and get enabled by exec. Group members are ruled by group
821 * leaders as stated in 1).
823 * 3) For traced programs attached by perf (pid/tid):
824 * - we specifically enable or disable all events during
827 * When attaching events to already running traced we
828 * enable/disable events specifically, as there's no
829 * initial traced exec call.
831 void perf_evsel__config(struct perf_evsel *evsel, struct record_opts *opts,
832 struct callchain_param *callchain)
834 struct perf_evsel *leader = evsel->leader;
835 struct perf_event_attr *attr = &evsel->attr;
836 int track = evsel->tracking;
837 bool per_cpu = opts->target.default_per_cpu && !opts->target.per_thread;
839 attr->sample_id_all = perf_missing_features.sample_id_all ? 0 : 1;
840 attr->inherit = !opts->no_inherit;
841 attr->write_backward = opts->overwrite ? 1 : 0;
843 perf_evsel__set_sample_bit(evsel, IP);
844 perf_evsel__set_sample_bit(evsel, TID);
846 if (evsel->sample_read) {
847 perf_evsel__set_sample_bit(evsel, READ);
850 * We need ID even in case of single event, because
851 * PERF_SAMPLE_READ process ID specific data.
853 perf_evsel__set_sample_id(evsel, false);
856 * Apply group format only if we belong to group
857 * with more than one members.
859 if (leader->nr_members > 1) {
860 attr->read_format |= PERF_FORMAT_GROUP;
866 * We default some events to have a default interval. But keep
867 * it a weak assumption overridable by the user.
869 if (!attr->sample_period || (opts->user_freq != UINT_MAX ||
870 opts->user_interval != ULLONG_MAX)) {
872 perf_evsel__set_sample_bit(evsel, PERIOD);
874 attr->sample_freq = opts->freq;
876 attr->sample_period = opts->default_interval;
881 * Disable sampling for all group members other
882 * than leader in case leader 'leads' the sampling.
884 if ((leader != evsel) && leader->sample_read) {
885 attr->sample_freq = 0;
886 attr->sample_period = 0;
889 if (opts->no_samples)
890 attr->sample_freq = 0;
892 if (opts->inherit_stat)
893 attr->inherit_stat = 1;
895 if (opts->sample_address) {
896 perf_evsel__set_sample_bit(evsel, ADDR);
897 attr->mmap_data = track;
901 * We don't allow user space callchains for function trace
902 * event, due to issues with page faults while tracing page
903 * fault handler and its overall trickiness nature.
905 if (perf_evsel__is_function_event(evsel))
906 evsel->attr.exclude_callchain_user = 1;
908 if (callchain && callchain->enabled && !evsel->no_aux_samples)
909 perf_evsel__config_callchain(evsel, opts, callchain);
911 if (opts->sample_intr_regs) {
912 attr->sample_regs_intr = opts->sample_intr_regs;
913 perf_evsel__set_sample_bit(evsel, REGS_INTR);
916 if (target__has_cpu(&opts->target) || opts->sample_cpu)
917 perf_evsel__set_sample_bit(evsel, CPU);
920 perf_evsel__set_sample_bit(evsel, PERIOD);
923 * When the user explicitly disabled time don't force it here.
925 if (opts->sample_time &&
926 (!perf_missing_features.sample_id_all &&
927 (!opts->no_inherit || target__has_cpu(&opts->target) || per_cpu ||
928 opts->sample_time_set)))
929 perf_evsel__set_sample_bit(evsel, TIME);
931 if (opts->raw_samples && !evsel->no_aux_samples) {
932 perf_evsel__set_sample_bit(evsel, TIME);
933 perf_evsel__set_sample_bit(evsel, RAW);
934 perf_evsel__set_sample_bit(evsel, CPU);
937 if (opts->sample_address)
938 perf_evsel__set_sample_bit(evsel, DATA_SRC);
940 if (opts->no_buffering) {
942 attr->wakeup_events = 1;
944 if (opts->branch_stack && !evsel->no_aux_samples) {
945 perf_evsel__set_sample_bit(evsel, BRANCH_STACK);
946 attr->branch_sample_type = opts->branch_stack;
949 if (opts->sample_weight)
950 perf_evsel__set_sample_bit(evsel, WEIGHT);
954 attr->mmap2 = track && !perf_missing_features.mmap2;
957 if (opts->record_namespaces)
958 attr->namespaces = track;
960 if (opts->record_switch_events)
961 attr->context_switch = track;
963 if (opts->sample_transaction)
964 perf_evsel__set_sample_bit(evsel, TRANSACTION);
966 if (opts->running_time) {
967 evsel->attr.read_format |=
968 PERF_FORMAT_TOTAL_TIME_ENABLED |
969 PERF_FORMAT_TOTAL_TIME_RUNNING;
973 * XXX see the function comment above
975 * Disabling only independent events or group leaders,
976 * keeping group members enabled.
978 if (perf_evsel__is_group_leader(evsel))
982 * Setting enable_on_exec for independent events and
983 * group leaders for traced executed by perf.
985 if (target__none(&opts->target) && perf_evsel__is_group_leader(evsel) &&
986 !opts->initial_delay)
987 attr->enable_on_exec = 1;
989 if (evsel->immediate) {
991 attr->enable_on_exec = 0;
994 clockid = opts->clockid;
995 if (opts->use_clockid) {
996 attr->use_clockid = 1;
997 attr->clockid = opts->clockid;
1000 if (evsel->precise_max)
1001 perf_event_attr__set_max_precise_ip(attr);
1003 if (opts->all_user) {
1004 attr->exclude_kernel = 1;
1005 attr->exclude_user = 0;
1008 if (opts->all_kernel) {
1009 attr->exclude_kernel = 0;
1010 attr->exclude_user = 1;
1014 * Apply event specific term settings,
1015 * it overloads any global configuration.
1017 apply_config_terms(evsel, opts);
1019 evsel->ignore_missing_thread = opts->ignore_missing_thread;
1022 static int perf_evsel__alloc_fd(struct perf_evsel *evsel, int ncpus, int nthreads)
1024 if (evsel->system_wide)
1027 evsel->fd = xyarray__new(ncpus, nthreads, sizeof(int));
1031 for (cpu = 0; cpu < ncpus; cpu++) {
1032 for (thread = 0; thread < nthreads; thread++) {
1033 FD(evsel, cpu, thread) = -1;
1038 return evsel->fd != NULL ? 0 : -ENOMEM;
1041 static int perf_evsel__run_ioctl(struct perf_evsel *evsel, int ncpus, int nthreads,
1046 if (evsel->system_wide)
1049 for (cpu = 0; cpu < ncpus; cpu++) {
1050 for (thread = 0; thread < nthreads; thread++) {
1051 int fd = FD(evsel, cpu, thread),
1052 err = ioctl(fd, ioc, arg);
1062 int perf_evsel__apply_filter(struct perf_evsel *evsel, int ncpus, int nthreads,
1065 return perf_evsel__run_ioctl(evsel, ncpus, nthreads,
1066 PERF_EVENT_IOC_SET_FILTER,
1070 int perf_evsel__set_filter(struct perf_evsel *evsel, const char *filter)
1072 char *new_filter = strdup(filter);
1074 if (new_filter != NULL) {
1075 free(evsel->filter);
1076 evsel->filter = new_filter;
1083 static int perf_evsel__append_filter(struct perf_evsel *evsel,
1084 const char *fmt, const char *filter)
1088 if (evsel->filter == NULL)
1089 return perf_evsel__set_filter(evsel, filter);
1091 if (asprintf(&new_filter, fmt, evsel->filter, filter) > 0) {
1092 free(evsel->filter);
1093 evsel->filter = new_filter;
1100 int perf_evsel__append_tp_filter(struct perf_evsel *evsel, const char *filter)
1102 return perf_evsel__append_filter(evsel, "(%s) && (%s)", filter);
1105 int perf_evsel__append_addr_filter(struct perf_evsel *evsel, const char *filter)
1107 return perf_evsel__append_filter(evsel, "%s,%s", filter);
1110 int perf_evsel__enable(struct perf_evsel *evsel)
1112 int nthreads = thread_map__nr(evsel->threads);
1113 int ncpus = cpu_map__nr(evsel->cpus);
1115 return perf_evsel__run_ioctl(evsel, ncpus, nthreads,
1116 PERF_EVENT_IOC_ENABLE,
1120 int perf_evsel__disable(struct perf_evsel *evsel)
1122 int nthreads = thread_map__nr(evsel->threads);
1123 int ncpus = cpu_map__nr(evsel->cpus);
1125 return perf_evsel__run_ioctl(evsel, ncpus, nthreads,
1126 PERF_EVENT_IOC_DISABLE,
1130 int perf_evsel__alloc_id(struct perf_evsel *evsel, int ncpus, int nthreads)
1132 if (ncpus == 0 || nthreads == 0)
1135 if (evsel->system_wide)
1138 evsel->sample_id = xyarray__new(ncpus, nthreads, sizeof(struct perf_sample_id));
1139 if (evsel->sample_id == NULL)
1142 evsel->id = zalloc(ncpus * nthreads * sizeof(u64));
1143 if (evsel->id == NULL) {
1144 xyarray__delete(evsel->sample_id);
1145 evsel->sample_id = NULL;
1152 static void perf_evsel__free_fd(struct perf_evsel *evsel)
1154 xyarray__delete(evsel->fd);
1158 static void perf_evsel__free_id(struct perf_evsel *evsel)
1160 xyarray__delete(evsel->sample_id);
1161 evsel->sample_id = NULL;
1165 static void perf_evsel__free_config_terms(struct perf_evsel *evsel)
1167 struct perf_evsel_config_term *term, *h;
1169 list_for_each_entry_safe(term, h, &evsel->config_terms, list) {
1170 list_del(&term->list);
1175 void perf_evsel__close_fd(struct perf_evsel *evsel, int ncpus, int nthreads)
1179 if (evsel->system_wide)
1182 for (cpu = 0; cpu < ncpus; cpu++)
1183 for (thread = 0; thread < nthreads; ++thread) {
1184 close(FD(evsel, cpu, thread));
1185 FD(evsel, cpu, thread) = -1;
1189 void perf_evsel__exit(struct perf_evsel *evsel)
1191 assert(list_empty(&evsel->node));
1192 assert(evsel->evlist == NULL);
1193 perf_evsel__free_fd(evsel);
1194 perf_evsel__free_id(evsel);
1195 perf_evsel__free_config_terms(evsel);
1196 close_cgroup(evsel->cgrp);
1197 cpu_map__put(evsel->cpus);
1198 cpu_map__put(evsel->own_cpus);
1199 thread_map__put(evsel->threads);
1200 zfree(&evsel->group_name);
1201 zfree(&evsel->name);
1202 perf_evsel__object.fini(evsel);
1205 void perf_evsel__delete(struct perf_evsel *evsel)
1207 perf_evsel__exit(evsel);
1211 void perf_evsel__compute_deltas(struct perf_evsel *evsel, int cpu, int thread,
1212 struct perf_counts_values *count)
1214 struct perf_counts_values tmp;
1216 if (!evsel->prev_raw_counts)
1220 tmp = evsel->prev_raw_counts->aggr;
1221 evsel->prev_raw_counts->aggr = *count;
1223 tmp = *perf_counts(evsel->prev_raw_counts, cpu, thread);
1224 *perf_counts(evsel->prev_raw_counts, cpu, thread) = *count;
1227 count->val = count->val - tmp.val;
1228 count->ena = count->ena - tmp.ena;
1229 count->run = count->run - tmp.run;
1232 void perf_counts_values__scale(struct perf_counts_values *count,
1233 bool scale, s8 *pscaled)
1238 if (count->run == 0) {
1241 } else if (count->run < count->ena) {
1243 count->val = (u64)((double) count->val * count->ena / count->run + 0.5);
1246 count->ena = count->run = 0;
1252 int perf_evsel__read(struct perf_evsel *evsel, int cpu, int thread,
1253 struct perf_counts_values *count)
1255 memset(count, 0, sizeof(*count));
1257 if (FD(evsel, cpu, thread) < 0)
1260 if (readn(FD(evsel, cpu, thread), count, sizeof(*count)) <= 0)
1266 int __perf_evsel__read_on_cpu(struct perf_evsel *evsel,
1267 int cpu, int thread, bool scale)
1269 struct perf_counts_values count;
1270 size_t nv = scale ? 3 : 1;
1272 if (FD(evsel, cpu, thread) < 0)
1275 if (evsel->counts == NULL && perf_evsel__alloc_counts(evsel, cpu + 1, thread + 1) < 0)
1278 if (readn(FD(evsel, cpu, thread), &count, nv * sizeof(u64)) <= 0)
1281 perf_evsel__compute_deltas(evsel, cpu, thread, &count);
1282 perf_counts_values__scale(&count, scale, NULL);
1283 *perf_counts(evsel->counts, cpu, thread) = count;
1287 static int get_group_fd(struct perf_evsel *evsel, int cpu, int thread)
1289 struct perf_evsel *leader = evsel->leader;
1292 if (perf_evsel__is_group_leader(evsel))
1296 * Leader must be already processed/open,
1297 * if not it's a bug.
1299 BUG_ON(!leader->fd);
1301 fd = FD(leader, cpu, thread);
1312 static void __p_bits(char *buf, size_t size, u64 value, struct bit_names *bits)
1314 bool first_bit = true;
1318 if (value & bits[i].bit) {
1319 buf += scnprintf(buf, size, "%s%s", first_bit ? "" : "|", bits[i].name);
1322 } while (bits[++i].name != NULL);
1325 static void __p_sample_type(char *buf, size_t size, u64 value)
1327 #define bit_name(n) { PERF_SAMPLE_##n, #n }
1328 struct bit_names bits[] = {
1329 bit_name(IP), bit_name(TID), bit_name(TIME), bit_name(ADDR),
1330 bit_name(READ), bit_name(CALLCHAIN), bit_name(ID), bit_name(CPU),
1331 bit_name(PERIOD), bit_name(STREAM_ID), bit_name(RAW),
1332 bit_name(BRANCH_STACK), bit_name(REGS_USER), bit_name(STACK_USER),
1333 bit_name(IDENTIFIER), bit_name(REGS_INTR), bit_name(DATA_SRC),
1338 __p_bits(buf, size, value, bits);
1341 static void __p_branch_sample_type(char *buf, size_t size, u64 value)
1343 #define bit_name(n) { PERF_SAMPLE_BRANCH_##n, #n }
1344 struct bit_names bits[] = {
1345 bit_name(USER), bit_name(KERNEL), bit_name(HV), bit_name(ANY),
1346 bit_name(ANY_CALL), bit_name(ANY_RETURN), bit_name(IND_CALL),
1347 bit_name(ABORT_TX), bit_name(IN_TX), bit_name(NO_TX),
1348 bit_name(COND), bit_name(CALL_STACK), bit_name(IND_JUMP),
1349 bit_name(CALL), bit_name(NO_FLAGS), bit_name(NO_CYCLES),
1353 __p_bits(buf, size, value, bits);
1356 static void __p_read_format(char *buf, size_t size, u64 value)
1358 #define bit_name(n) { PERF_FORMAT_##n, #n }
1359 struct bit_names bits[] = {
1360 bit_name(TOTAL_TIME_ENABLED), bit_name(TOTAL_TIME_RUNNING),
1361 bit_name(ID), bit_name(GROUP),
1365 __p_bits(buf, size, value, bits);
1368 #define BUF_SIZE 1024
1370 #define p_hex(val) snprintf(buf, BUF_SIZE, "%#"PRIx64, (uint64_t)(val))
1371 #define p_unsigned(val) snprintf(buf, BUF_SIZE, "%"PRIu64, (uint64_t)(val))
1372 #define p_signed(val) snprintf(buf, BUF_SIZE, "%"PRId64, (int64_t)(val))
1373 #define p_sample_type(val) __p_sample_type(buf, BUF_SIZE, val)
1374 #define p_branch_sample_type(val) __p_branch_sample_type(buf, BUF_SIZE, val)
1375 #define p_read_format(val) __p_read_format(buf, BUF_SIZE, val)
1377 #define PRINT_ATTRn(_n, _f, _p) \
1381 ret += attr__fprintf(fp, _n, buf, priv);\
1385 #define PRINT_ATTRf(_f, _p) PRINT_ATTRn(#_f, _f, _p)
1387 int perf_event_attr__fprintf(FILE *fp, struct perf_event_attr *attr,
1388 attr__fprintf_f attr__fprintf, void *priv)
1393 PRINT_ATTRf(type, p_unsigned);
1394 PRINT_ATTRf(size, p_unsigned);
1395 PRINT_ATTRf(config, p_hex);
1396 PRINT_ATTRn("{ sample_period, sample_freq }", sample_period, p_unsigned);
1397 PRINT_ATTRf(sample_type, p_sample_type);
1398 PRINT_ATTRf(read_format, p_read_format);
1400 PRINT_ATTRf(disabled, p_unsigned);
1401 PRINT_ATTRf(inherit, p_unsigned);
1402 PRINT_ATTRf(pinned, p_unsigned);
1403 PRINT_ATTRf(exclusive, p_unsigned);
1404 PRINT_ATTRf(exclude_user, p_unsigned);
1405 PRINT_ATTRf(exclude_kernel, p_unsigned);
1406 PRINT_ATTRf(exclude_hv, p_unsigned);
1407 PRINT_ATTRf(exclude_idle, p_unsigned);
1408 PRINT_ATTRf(mmap, p_unsigned);
1409 PRINT_ATTRf(comm, p_unsigned);
1410 PRINT_ATTRf(freq, p_unsigned);
1411 PRINT_ATTRf(inherit_stat, p_unsigned);
1412 PRINT_ATTRf(enable_on_exec, p_unsigned);
1413 PRINT_ATTRf(task, p_unsigned);
1414 PRINT_ATTRf(watermark, p_unsigned);
1415 PRINT_ATTRf(precise_ip, p_unsigned);
1416 PRINT_ATTRf(mmap_data, p_unsigned);
1417 PRINT_ATTRf(sample_id_all, p_unsigned);
1418 PRINT_ATTRf(exclude_host, p_unsigned);
1419 PRINT_ATTRf(exclude_guest, p_unsigned);
1420 PRINT_ATTRf(exclude_callchain_kernel, p_unsigned);
1421 PRINT_ATTRf(exclude_callchain_user, p_unsigned);
1422 PRINT_ATTRf(mmap2, p_unsigned);
1423 PRINT_ATTRf(comm_exec, p_unsigned);
1424 PRINT_ATTRf(use_clockid, p_unsigned);
1425 PRINT_ATTRf(context_switch, p_unsigned);
1426 PRINT_ATTRf(write_backward, p_unsigned);
1428 PRINT_ATTRn("{ wakeup_events, wakeup_watermark }", wakeup_events, p_unsigned);
1429 PRINT_ATTRf(bp_type, p_unsigned);
1430 PRINT_ATTRn("{ bp_addr, config1 }", bp_addr, p_hex);
1431 PRINT_ATTRn("{ bp_len, config2 }", bp_len, p_hex);
1432 PRINT_ATTRf(branch_sample_type, p_branch_sample_type);
1433 PRINT_ATTRf(sample_regs_user, p_hex);
1434 PRINT_ATTRf(sample_stack_user, p_unsigned);
1435 PRINT_ATTRf(clockid, p_signed);
1436 PRINT_ATTRf(sample_regs_intr, p_hex);
1437 PRINT_ATTRf(aux_watermark, p_unsigned);
1438 PRINT_ATTRf(sample_max_stack, p_unsigned);
1443 static int __open_attr__fprintf(FILE *fp, const char *name, const char *val,
1444 void *priv __attribute__((unused)))
1446 return fprintf(fp, " %-32s %s\n", name, val);
1449 static bool ignore_missing_thread(struct perf_evsel *evsel,
1450 struct thread_map *threads,
1451 int thread, int err)
1453 if (!evsel->ignore_missing_thread)
1456 /* The system wide setup does not work with threads. */
1457 if (evsel->system_wide)
1460 /* The -ESRCH is perf event syscall errno for pid's not found. */
1464 /* If there's only one thread, let it fail. */
1465 if (threads->nr == 1)
1468 if (thread_map__remove(threads, thread))
1471 pr_warning("WARNING: Ignored open failure for pid %d\n",
1472 thread_map__pid(threads, thread));
1476 int perf_evsel__open(struct perf_evsel *evsel, struct cpu_map *cpus,
1477 struct thread_map *threads)
1479 int cpu, thread, nthreads;
1480 unsigned long flags = PERF_FLAG_FD_CLOEXEC;
1482 enum { NO_CHANGE, SET_TO_MAX, INCREASED_MAX } set_rlimit = NO_CHANGE;
1484 if (perf_missing_features.write_backward && evsel->attr.write_backward)
1488 static struct cpu_map *empty_cpu_map;
1490 if (empty_cpu_map == NULL) {
1491 empty_cpu_map = cpu_map__dummy_new();
1492 if (empty_cpu_map == NULL)
1496 cpus = empty_cpu_map;
1499 if (threads == NULL) {
1500 static struct thread_map *empty_thread_map;
1502 if (empty_thread_map == NULL) {
1503 empty_thread_map = thread_map__new_by_tid(-1);
1504 if (empty_thread_map == NULL)
1508 threads = empty_thread_map;
1511 if (evsel->system_wide)
1514 nthreads = threads->nr;
1516 if (evsel->fd == NULL &&
1517 perf_evsel__alloc_fd(evsel, cpus->nr, nthreads) < 0)
1521 flags |= PERF_FLAG_PID_CGROUP;
1522 pid = evsel->cgrp->fd;
1525 fallback_missing_features:
1526 if (perf_missing_features.clockid_wrong)
1527 evsel->attr.clockid = CLOCK_MONOTONIC; /* should always work */
1528 if (perf_missing_features.clockid) {
1529 evsel->attr.use_clockid = 0;
1530 evsel->attr.clockid = 0;
1532 if (perf_missing_features.cloexec)
1533 flags &= ~(unsigned long)PERF_FLAG_FD_CLOEXEC;
1534 if (perf_missing_features.mmap2)
1535 evsel->attr.mmap2 = 0;
1536 if (perf_missing_features.exclude_guest)
1537 evsel->attr.exclude_guest = evsel->attr.exclude_host = 0;
1538 if (perf_missing_features.lbr_flags)
1539 evsel->attr.branch_sample_type &= ~(PERF_SAMPLE_BRANCH_NO_FLAGS |
1540 PERF_SAMPLE_BRANCH_NO_CYCLES);
1542 if (perf_missing_features.sample_id_all)
1543 evsel->attr.sample_id_all = 0;
1546 fprintf(stderr, "%.60s\n", graph_dotted_line);
1547 fprintf(stderr, "perf_event_attr:\n");
1548 perf_event_attr__fprintf(stderr, &evsel->attr, __open_attr__fprintf, NULL);
1549 fprintf(stderr, "%.60s\n", graph_dotted_line);
1552 for (cpu = 0; cpu < cpus->nr; cpu++) {
1554 for (thread = 0; thread < nthreads; thread++) {
1557 if (!evsel->cgrp && !evsel->system_wide)
1558 pid = thread_map__pid(threads, thread);
1560 group_fd = get_group_fd(evsel, cpu, thread);
1562 pr_debug2("sys_perf_event_open: pid %d cpu %d group_fd %d flags %#lx",
1563 pid, cpus->map[cpu], group_fd, flags);
1565 fd = sys_perf_event_open(&evsel->attr, pid, cpus->map[cpu],
1568 FD(evsel, cpu, thread) = fd;
1573 if (ignore_missing_thread(evsel, threads, thread, err)) {
1575 * We just removed 1 thread, so take a step
1576 * back on thread index and lower the upper
1582 /* ... and pretend like nothing have happened. */
1587 pr_debug2("\nsys_perf_event_open failed, error %d\n",
1592 pr_debug2(" = %d\n", fd);
1594 if (evsel->bpf_fd >= 0) {
1596 int bpf_fd = evsel->bpf_fd;
1599 PERF_EVENT_IOC_SET_BPF,
1601 if (err && errno != EEXIST) {
1602 pr_err("failed to attach bpf fd %d: %s\n",
1603 bpf_fd, strerror(errno));
1609 set_rlimit = NO_CHANGE;
1612 * If we succeeded but had to kill clockid, fail and
1613 * have perf_evsel__open_strerror() print us a nice
1616 if (perf_missing_features.clockid ||
1617 perf_missing_features.clockid_wrong) {
1628 * perf stat needs between 5 and 22 fds per CPU. When we run out
1629 * of them try to increase the limits.
1631 if (err == -EMFILE && set_rlimit < INCREASED_MAX) {
1633 int old_errno = errno;
1635 if (getrlimit(RLIMIT_NOFILE, &l) == 0) {
1636 if (set_rlimit == NO_CHANGE)
1637 l.rlim_cur = l.rlim_max;
1639 l.rlim_cur = l.rlim_max + 1000;
1640 l.rlim_max = l.rlim_cur;
1642 if (setrlimit(RLIMIT_NOFILE, &l) == 0) {
1651 if (err != -EINVAL || cpu > 0 || thread > 0)
1655 * Must probe features in the order they were added to the
1656 * perf_event_attr interface.
1658 if (!perf_missing_features.write_backward && evsel->attr.write_backward) {
1659 perf_missing_features.write_backward = true;
1661 } else if (!perf_missing_features.clockid_wrong && evsel->attr.use_clockid) {
1662 perf_missing_features.clockid_wrong = true;
1663 goto fallback_missing_features;
1664 } else if (!perf_missing_features.clockid && evsel->attr.use_clockid) {
1665 perf_missing_features.clockid = true;
1666 goto fallback_missing_features;
1667 } else if (!perf_missing_features.cloexec && (flags & PERF_FLAG_FD_CLOEXEC)) {
1668 perf_missing_features.cloexec = true;
1669 goto fallback_missing_features;
1670 } else if (!perf_missing_features.mmap2 && evsel->attr.mmap2) {
1671 perf_missing_features.mmap2 = true;
1672 goto fallback_missing_features;
1673 } else if (!perf_missing_features.exclude_guest &&
1674 (evsel->attr.exclude_guest || evsel->attr.exclude_host)) {
1675 perf_missing_features.exclude_guest = true;
1676 goto fallback_missing_features;
1677 } else if (!perf_missing_features.sample_id_all) {
1678 perf_missing_features.sample_id_all = true;
1679 goto retry_sample_id;
1680 } else if (!perf_missing_features.lbr_flags &&
1681 (evsel->attr.branch_sample_type &
1682 (PERF_SAMPLE_BRANCH_NO_CYCLES |
1683 PERF_SAMPLE_BRANCH_NO_FLAGS))) {
1684 perf_missing_features.lbr_flags = true;
1685 goto fallback_missing_features;
1689 while (--thread >= 0) {
1690 close(FD(evsel, cpu, thread));
1691 FD(evsel, cpu, thread) = -1;
1694 } while (--cpu >= 0);
1698 void perf_evsel__close(struct perf_evsel *evsel, int ncpus, int nthreads)
1700 if (evsel->fd == NULL)
1703 perf_evsel__close_fd(evsel, ncpus, nthreads);
1704 perf_evsel__free_fd(evsel);
1707 int perf_evsel__open_per_cpu(struct perf_evsel *evsel,
1708 struct cpu_map *cpus)
1710 return perf_evsel__open(evsel, cpus, NULL);
1713 int perf_evsel__open_per_thread(struct perf_evsel *evsel,
1714 struct thread_map *threads)
1716 return perf_evsel__open(evsel, NULL, threads);
1719 static int perf_evsel__parse_id_sample(const struct perf_evsel *evsel,
1720 const union perf_event *event,
1721 struct perf_sample *sample)
1723 u64 type = evsel->attr.sample_type;
1724 const u64 *array = event->sample.array;
1725 bool swapped = evsel->needs_swap;
1728 array += ((event->header.size -
1729 sizeof(event->header)) / sizeof(u64)) - 1;
1731 if (type & PERF_SAMPLE_IDENTIFIER) {
1732 sample->id = *array;
1736 if (type & PERF_SAMPLE_CPU) {
1739 /* undo swap of u64, then swap on individual u32s */
1740 u.val64 = bswap_64(u.val64);
1741 u.val32[0] = bswap_32(u.val32[0]);
1744 sample->cpu = u.val32[0];
1748 if (type & PERF_SAMPLE_STREAM_ID) {
1749 sample->stream_id = *array;
1753 if (type & PERF_SAMPLE_ID) {
1754 sample->id = *array;
1758 if (type & PERF_SAMPLE_TIME) {
1759 sample->time = *array;
1763 if (type & PERF_SAMPLE_TID) {
1766 /* undo swap of u64, then swap on individual u32s */
1767 u.val64 = bswap_64(u.val64);
1768 u.val32[0] = bswap_32(u.val32[0]);
1769 u.val32[1] = bswap_32(u.val32[1]);
1772 sample->pid = u.val32[0];
1773 sample->tid = u.val32[1];
1780 static inline bool overflow(const void *endp, u16 max_size, const void *offset,
1783 return size > max_size || offset + size > endp;
1786 #define OVERFLOW_CHECK(offset, size, max_size) \
1788 if (overflow(endp, (max_size), (offset), (size))) \
1792 #define OVERFLOW_CHECK_u64(offset) \
1793 OVERFLOW_CHECK(offset, sizeof(u64), sizeof(u64))
1795 int perf_evsel__parse_sample(struct perf_evsel *evsel, union perf_event *event,
1796 struct perf_sample *data)
1798 u64 type = evsel->attr.sample_type;
1799 bool swapped = evsel->needs_swap;
1801 u16 max_size = event->header.size;
1802 const void *endp = (void *)event + max_size;
1806 * used for cross-endian analysis. See git commit 65014ab3
1807 * for why this goofiness is needed.
1811 memset(data, 0, sizeof(*data));
1812 data->cpu = data->pid = data->tid = -1;
1813 data->stream_id = data->id = data->time = -1ULL;
1814 data->period = evsel->attr.sample_period;
1815 data->cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK;
1817 if (event->header.type != PERF_RECORD_SAMPLE) {
1818 if (!evsel->attr.sample_id_all)
1820 return perf_evsel__parse_id_sample(evsel, event, data);
1823 array = event->sample.array;
1826 * The evsel's sample_size is based on PERF_SAMPLE_MASK which includes
1827 * up to PERF_SAMPLE_PERIOD. After that overflow() must be used to
1828 * check the format does not go past the end of the event.
1830 if (evsel->sample_size + sizeof(event->header) > event->header.size)
1834 if (type & PERF_SAMPLE_IDENTIFIER) {
1839 if (type & PERF_SAMPLE_IP) {
1844 if (type & PERF_SAMPLE_TID) {
1847 /* undo swap of u64, then swap on individual u32s */
1848 u.val64 = bswap_64(u.val64);
1849 u.val32[0] = bswap_32(u.val32[0]);
1850 u.val32[1] = bswap_32(u.val32[1]);
1853 data->pid = u.val32[0];
1854 data->tid = u.val32[1];
1858 if (type & PERF_SAMPLE_TIME) {
1859 data->time = *array;
1864 if (type & PERF_SAMPLE_ADDR) {
1865 data->addr = *array;
1869 if (type & PERF_SAMPLE_ID) {
1874 if (type & PERF_SAMPLE_STREAM_ID) {
1875 data->stream_id = *array;
1879 if (type & PERF_SAMPLE_CPU) {
1883 /* undo swap of u64, then swap on individual u32s */
1884 u.val64 = bswap_64(u.val64);
1885 u.val32[0] = bswap_32(u.val32[0]);
1888 data->cpu = u.val32[0];
1892 if (type & PERF_SAMPLE_PERIOD) {
1893 data->period = *array;
1897 if (type & PERF_SAMPLE_READ) {
1898 u64 read_format = evsel->attr.read_format;
1900 OVERFLOW_CHECK_u64(array);
1901 if (read_format & PERF_FORMAT_GROUP)
1902 data->read.group.nr = *array;
1904 data->read.one.value = *array;
1908 if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED) {
1909 OVERFLOW_CHECK_u64(array);
1910 data->read.time_enabled = *array;
1914 if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING) {
1915 OVERFLOW_CHECK_u64(array);
1916 data->read.time_running = *array;
1920 /* PERF_FORMAT_ID is forced for PERF_SAMPLE_READ */
1921 if (read_format & PERF_FORMAT_GROUP) {
1922 const u64 max_group_nr = UINT64_MAX /
1923 sizeof(struct sample_read_value);
1925 if (data->read.group.nr > max_group_nr)
1927 sz = data->read.group.nr *
1928 sizeof(struct sample_read_value);
1929 OVERFLOW_CHECK(array, sz, max_size);
1930 data->read.group.values =
1931 (struct sample_read_value *)array;
1932 array = (void *)array + sz;
1934 OVERFLOW_CHECK_u64(array);
1935 data->read.one.id = *array;
1940 if (type & PERF_SAMPLE_CALLCHAIN) {
1941 const u64 max_callchain_nr = UINT64_MAX / sizeof(u64);
1943 OVERFLOW_CHECK_u64(array);
1944 data->callchain = (struct ip_callchain *)array++;
1945 if (data->callchain->nr > max_callchain_nr)
1947 sz = data->callchain->nr * sizeof(u64);
1948 OVERFLOW_CHECK(array, sz, max_size);
1949 array = (void *)array + sz;
1952 if (type & PERF_SAMPLE_RAW) {
1953 OVERFLOW_CHECK_u64(array);
1955 if (WARN_ONCE(swapped,
1956 "Endianness of raw data not corrected!\n")) {
1957 /* undo swap of u64, then swap on individual u32s */
1958 u.val64 = bswap_64(u.val64);
1959 u.val32[0] = bswap_32(u.val32[0]);
1960 u.val32[1] = bswap_32(u.val32[1]);
1962 data->raw_size = u.val32[0];
1963 array = (void *)array + sizeof(u32);
1965 OVERFLOW_CHECK(array, data->raw_size, max_size);
1966 data->raw_data = (void *)array;
1967 array = (void *)array + data->raw_size;
1970 if (type & PERF_SAMPLE_BRANCH_STACK) {
1971 const u64 max_branch_nr = UINT64_MAX /
1972 sizeof(struct branch_entry);
1974 OVERFLOW_CHECK_u64(array);
1975 data->branch_stack = (struct branch_stack *)array++;
1977 if (data->branch_stack->nr > max_branch_nr)
1979 sz = data->branch_stack->nr * sizeof(struct branch_entry);
1980 OVERFLOW_CHECK(array, sz, max_size);
1981 array = (void *)array + sz;
1984 if (type & PERF_SAMPLE_REGS_USER) {
1985 OVERFLOW_CHECK_u64(array);
1986 data->user_regs.abi = *array;
1989 if (data->user_regs.abi) {
1990 u64 mask = evsel->attr.sample_regs_user;
1992 sz = hweight_long(mask) * sizeof(u64);
1993 OVERFLOW_CHECK(array, sz, max_size);
1994 data->user_regs.mask = mask;
1995 data->user_regs.regs = (u64 *)array;
1996 array = (void *)array + sz;
2000 if (type & PERF_SAMPLE_STACK_USER) {
2001 OVERFLOW_CHECK_u64(array);
2004 data->user_stack.offset = ((char *)(array - 1)
2008 data->user_stack.size = 0;
2010 OVERFLOW_CHECK(array, sz, max_size);
2011 data->user_stack.data = (char *)array;
2012 array = (void *)array + sz;
2013 OVERFLOW_CHECK_u64(array);
2014 data->user_stack.size = *array++;
2015 if (WARN_ONCE(data->user_stack.size > sz,
2016 "user stack dump failure\n"))
2021 if (type & PERF_SAMPLE_WEIGHT) {
2022 OVERFLOW_CHECK_u64(array);
2023 data->weight = *array;
2027 data->data_src = PERF_MEM_DATA_SRC_NONE;
2028 if (type & PERF_SAMPLE_DATA_SRC) {
2029 OVERFLOW_CHECK_u64(array);
2030 data->data_src = *array;
2034 data->transaction = 0;
2035 if (type & PERF_SAMPLE_TRANSACTION) {
2036 OVERFLOW_CHECK_u64(array);
2037 data->transaction = *array;
2041 data->intr_regs.abi = PERF_SAMPLE_REGS_ABI_NONE;
2042 if (type & PERF_SAMPLE_REGS_INTR) {
2043 OVERFLOW_CHECK_u64(array);
2044 data->intr_regs.abi = *array;
2047 if (data->intr_regs.abi != PERF_SAMPLE_REGS_ABI_NONE) {
2048 u64 mask = evsel->attr.sample_regs_intr;
2050 sz = hweight_long(mask) * sizeof(u64);
2051 OVERFLOW_CHECK(array, sz, max_size);
2052 data->intr_regs.mask = mask;
2053 data->intr_regs.regs = (u64 *)array;
2054 array = (void *)array + sz;
2061 size_t perf_event__sample_event_size(const struct perf_sample *sample, u64 type,
2064 size_t sz, result = sizeof(struct sample_event);
2066 if (type & PERF_SAMPLE_IDENTIFIER)
2067 result += sizeof(u64);
2069 if (type & PERF_SAMPLE_IP)
2070 result += sizeof(u64);
2072 if (type & PERF_SAMPLE_TID)
2073 result += sizeof(u64);
2075 if (type & PERF_SAMPLE_TIME)
2076 result += sizeof(u64);
2078 if (type & PERF_SAMPLE_ADDR)
2079 result += sizeof(u64);
2081 if (type & PERF_SAMPLE_ID)
2082 result += sizeof(u64);
2084 if (type & PERF_SAMPLE_STREAM_ID)
2085 result += sizeof(u64);
2087 if (type & PERF_SAMPLE_CPU)
2088 result += sizeof(u64);
2090 if (type & PERF_SAMPLE_PERIOD)
2091 result += sizeof(u64);
2093 if (type & PERF_SAMPLE_READ) {
2094 result += sizeof(u64);
2095 if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED)
2096 result += sizeof(u64);
2097 if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING)
2098 result += sizeof(u64);
2099 /* PERF_FORMAT_ID is forced for PERF_SAMPLE_READ */
2100 if (read_format & PERF_FORMAT_GROUP) {
2101 sz = sample->read.group.nr *
2102 sizeof(struct sample_read_value);
2105 result += sizeof(u64);
2109 if (type & PERF_SAMPLE_CALLCHAIN) {
2110 sz = (sample->callchain->nr + 1) * sizeof(u64);
2114 if (type & PERF_SAMPLE_RAW) {
2115 result += sizeof(u32);
2116 result += sample->raw_size;
2119 if (type & PERF_SAMPLE_BRANCH_STACK) {
2120 sz = sample->branch_stack->nr * sizeof(struct branch_entry);
2125 if (type & PERF_SAMPLE_REGS_USER) {
2126 if (sample->user_regs.abi) {
2127 result += sizeof(u64);
2128 sz = hweight_long(sample->user_regs.mask) * sizeof(u64);
2131 result += sizeof(u64);
2135 if (type & PERF_SAMPLE_STACK_USER) {
2136 sz = sample->user_stack.size;
2137 result += sizeof(u64);
2140 result += sizeof(u64);
2144 if (type & PERF_SAMPLE_WEIGHT)
2145 result += sizeof(u64);
2147 if (type & PERF_SAMPLE_DATA_SRC)
2148 result += sizeof(u64);
2150 if (type & PERF_SAMPLE_TRANSACTION)
2151 result += sizeof(u64);
2153 if (type & PERF_SAMPLE_REGS_INTR) {
2154 if (sample->intr_regs.abi) {
2155 result += sizeof(u64);
2156 sz = hweight_long(sample->intr_regs.mask) * sizeof(u64);
2159 result += sizeof(u64);
2166 int perf_event__synthesize_sample(union perf_event *event, u64 type,
2168 const struct perf_sample *sample,
2174 * used for cross-endian analysis. See git commit 65014ab3
2175 * for why this goofiness is needed.
2179 array = event->sample.array;
2181 if (type & PERF_SAMPLE_IDENTIFIER) {
2182 *array = sample->id;
2186 if (type & PERF_SAMPLE_IP) {
2187 *array = sample->ip;
2191 if (type & PERF_SAMPLE_TID) {
2192 u.val32[0] = sample->pid;
2193 u.val32[1] = sample->tid;
2196 * Inverse of what is done in perf_evsel__parse_sample
2198 u.val32[0] = bswap_32(u.val32[0]);
2199 u.val32[1] = bswap_32(u.val32[1]);
2200 u.val64 = bswap_64(u.val64);
2207 if (type & PERF_SAMPLE_TIME) {
2208 *array = sample->time;
2212 if (type & PERF_SAMPLE_ADDR) {
2213 *array = sample->addr;
2217 if (type & PERF_SAMPLE_ID) {
2218 *array = sample->id;
2222 if (type & PERF_SAMPLE_STREAM_ID) {
2223 *array = sample->stream_id;
2227 if (type & PERF_SAMPLE_CPU) {
2228 u.val32[0] = sample->cpu;
2231 * Inverse of what is done in perf_evsel__parse_sample
2233 u.val32[0] = bswap_32(u.val32[0]);
2234 u.val64 = bswap_64(u.val64);
2240 if (type & PERF_SAMPLE_PERIOD) {
2241 *array = sample->period;
2245 if (type & PERF_SAMPLE_READ) {
2246 if (read_format & PERF_FORMAT_GROUP)
2247 *array = sample->read.group.nr;
2249 *array = sample->read.one.value;
2252 if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED) {
2253 *array = sample->read.time_enabled;
2257 if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING) {
2258 *array = sample->read.time_running;
2262 /* PERF_FORMAT_ID is forced for PERF_SAMPLE_READ */
2263 if (read_format & PERF_FORMAT_GROUP) {
2264 sz = sample->read.group.nr *
2265 sizeof(struct sample_read_value);
2266 memcpy(array, sample->read.group.values, sz);
2267 array = (void *)array + sz;
2269 *array = sample->read.one.id;
2274 if (type & PERF_SAMPLE_CALLCHAIN) {
2275 sz = (sample->callchain->nr + 1) * sizeof(u64);
2276 memcpy(array, sample->callchain, sz);
2277 array = (void *)array + sz;
2280 if (type & PERF_SAMPLE_RAW) {
2281 u.val32[0] = sample->raw_size;
2282 if (WARN_ONCE(swapped,
2283 "Endianness of raw data not corrected!\n")) {
2285 * Inverse of what is done in perf_evsel__parse_sample
2287 u.val32[0] = bswap_32(u.val32[0]);
2288 u.val32[1] = bswap_32(u.val32[1]);
2289 u.val64 = bswap_64(u.val64);
2292 array = (void *)array + sizeof(u32);
2294 memcpy(array, sample->raw_data, sample->raw_size);
2295 array = (void *)array + sample->raw_size;
2298 if (type & PERF_SAMPLE_BRANCH_STACK) {
2299 sz = sample->branch_stack->nr * sizeof(struct branch_entry);
2301 memcpy(array, sample->branch_stack, sz);
2302 array = (void *)array + sz;
2305 if (type & PERF_SAMPLE_REGS_USER) {
2306 if (sample->user_regs.abi) {
2307 *array++ = sample->user_regs.abi;
2308 sz = hweight_long(sample->user_regs.mask) * sizeof(u64);
2309 memcpy(array, sample->user_regs.regs, sz);
2310 array = (void *)array + sz;
2316 if (type & PERF_SAMPLE_STACK_USER) {
2317 sz = sample->user_stack.size;
2320 memcpy(array, sample->user_stack.data, sz);
2321 array = (void *)array + sz;
2326 if (type & PERF_SAMPLE_WEIGHT) {
2327 *array = sample->weight;
2331 if (type & PERF_SAMPLE_DATA_SRC) {
2332 *array = sample->data_src;
2336 if (type & PERF_SAMPLE_TRANSACTION) {
2337 *array = sample->transaction;
2341 if (type & PERF_SAMPLE_REGS_INTR) {
2342 if (sample->intr_regs.abi) {
2343 *array++ = sample->intr_regs.abi;
2344 sz = hweight_long(sample->intr_regs.mask) * sizeof(u64);
2345 memcpy(array, sample->intr_regs.regs, sz);
2346 array = (void *)array + sz;
2355 struct format_field *perf_evsel__field(struct perf_evsel *evsel, const char *name)
2357 return pevent_find_field(evsel->tp_format, name);
2360 void *perf_evsel__rawptr(struct perf_evsel *evsel, struct perf_sample *sample,
2363 struct format_field *field = perf_evsel__field(evsel, name);
2369 offset = field->offset;
2371 if (field->flags & FIELD_IS_DYNAMIC) {
2372 offset = *(int *)(sample->raw_data + field->offset);
2376 return sample->raw_data + offset;
2379 u64 format_field__intval(struct format_field *field, struct perf_sample *sample,
2383 void *ptr = sample->raw_data + field->offset;
2385 switch (field->size) {
2389 value = *(u16 *)ptr;
2392 value = *(u32 *)ptr;
2395 memcpy(&value, ptr, sizeof(u64));
2404 switch (field->size) {
2406 return bswap_16(value);
2408 return bswap_32(value);
2410 return bswap_64(value);
2418 u64 perf_evsel__intval(struct perf_evsel *evsel, struct perf_sample *sample,
2421 struct format_field *field = perf_evsel__field(evsel, name);
2426 return field ? format_field__intval(field, sample, evsel->needs_swap) : 0;
2429 bool perf_evsel__fallback(struct perf_evsel *evsel, int err,
2430 char *msg, size_t msgsize)
2434 if ((err == ENOENT || err == ENXIO || err == ENODEV) &&
2435 evsel->attr.type == PERF_TYPE_HARDWARE &&
2436 evsel->attr.config == PERF_COUNT_HW_CPU_CYCLES) {
2438 * If it's cycles then fall back to hrtimer based
2439 * cpu-clock-tick sw counter, which is always available even if
2442 * PPC returns ENXIO until 2.6.37 (behavior changed with commit
2445 scnprintf(msg, msgsize, "%s",
2446 "The cycles event is not supported, trying to fall back to cpu-clock-ticks");
2448 evsel->attr.type = PERF_TYPE_SOFTWARE;
2449 evsel->attr.config = PERF_COUNT_SW_CPU_CLOCK;
2451 zfree(&evsel->name);
2453 } else if (err == EACCES && !evsel->attr.exclude_kernel &&
2454 (paranoid = perf_event_paranoid()) > 1) {
2455 const char *name = perf_evsel__name(evsel);
2458 if (asprintf(&new_name, "%s%su", name, strchr(name, ':') ? "" : ":") < 0)
2463 evsel->name = new_name;
2464 scnprintf(msg, msgsize,
2465 "kernel.perf_event_paranoid=%d, trying to fall back to excluding kernel samples", paranoid);
2466 evsel->attr.exclude_kernel = 1;
2474 int perf_evsel__open_strerror(struct perf_evsel *evsel, struct target *target,
2475 int err, char *msg, size_t size)
2477 char sbuf[STRERR_BUFSIZE];
2484 printed = scnprintf(msg, size,
2485 "No permission to enable %s event.\n\n",
2486 perf_evsel__name(evsel));
2488 return scnprintf(msg + printed, size - printed,
2489 "You may not have permission to collect %sstats.\n\n"
2490 "Consider tweaking /proc/sys/kernel/perf_event_paranoid,\n"
2491 "which controls use of the performance events system by\n"
2492 "unprivileged users (without CAP_SYS_ADMIN).\n\n"
2493 "The current value is %d:\n\n"
2494 " -1: Allow use of (almost) all events by all users\n"
2495 ">= 0: Disallow raw tracepoint access by users without CAP_IOC_LOCK\n"
2496 ">= 1: Disallow CPU event access by users without CAP_SYS_ADMIN\n"
2497 ">= 2: Disallow kernel profiling by users without CAP_SYS_ADMIN\n\n"
2498 "To make this setting permanent, edit /etc/sysctl.conf too, e.g.:\n\n"
2499 " kernel.perf_event_paranoid = -1\n" ,
2500 target->system_wide ? "system-wide " : "",
2501 perf_event_paranoid());
2503 return scnprintf(msg, size, "The %s event is not supported.",
2504 perf_evsel__name(evsel));
2506 return scnprintf(msg, size, "%s",
2507 "Too many events are opened.\n"
2508 "Probably the maximum number of open file descriptors has been reached.\n"
2509 "Hint: Try again after reducing the number of events.\n"
2510 "Hint: Try increasing the limit with 'ulimit -n <limit>'");
2512 if ((evsel->attr.sample_type & PERF_SAMPLE_CALLCHAIN) != 0 &&
2513 access("/proc/sys/kernel/perf_event_max_stack", F_OK) == 0)
2514 return scnprintf(msg, size,
2515 "Not enough memory to setup event with callchain.\n"
2516 "Hint: Try tweaking /proc/sys/kernel/perf_event_max_stack\n"
2517 "Hint: Current value: %d", sysctl_perf_event_max_stack);
2520 if (target->cpu_list)
2521 return scnprintf(msg, size, "%s",
2522 "No such device - did you specify an out-of-range profile CPU?");
2525 if (evsel->attr.sample_period != 0)
2526 return scnprintf(msg, size, "%s",
2527 "PMU Hardware doesn't support sampling/overflow-interrupts.");
2528 if (evsel->attr.precise_ip)
2529 return scnprintf(msg, size, "%s",
2530 "\'precise\' request may not be supported. Try removing 'p' modifier.");
2531 #if defined(__i386__) || defined(__x86_64__)
2532 if (evsel->attr.type == PERF_TYPE_HARDWARE)
2533 return scnprintf(msg, size, "%s",
2534 "No hardware sampling interrupt available.\n"
2535 "No APIC? If so then you can boot the kernel with the \"lapic\" boot parameter to force-enable it.");
2539 if (find_process("oprofiled"))
2540 return scnprintf(msg, size,
2541 "The PMU counters are busy/taken by another profiler.\n"
2542 "We found oprofile daemon running, please stop it and try again.");
2545 if (evsel->attr.write_backward && perf_missing_features.write_backward)
2546 return scnprintf(msg, size, "Reading from overwrite event is not supported by this kernel.");
2547 if (perf_missing_features.clockid)
2548 return scnprintf(msg, size, "clockid feature not supported.");
2549 if (perf_missing_features.clockid_wrong)
2550 return scnprintf(msg, size, "wrong clockid (%d).", clockid);
2556 return scnprintf(msg, size,
2557 "The sys_perf_event_open() syscall returned with %d (%s) for event (%s).\n"
2558 "/bin/dmesg may provide additional information.\n"
2559 "No CONFIG_PERF_EVENTS=y kernel support configured?",
2560 err, str_error_r(err, sbuf, sizeof(sbuf)),
2561 perf_evsel__name(evsel));
2564 char *perf_evsel__env_arch(struct perf_evsel *evsel)
2566 if (evsel && evsel->evlist && evsel->evlist->env)
2567 return evsel->evlist->env->arch;