1 // SPDX-License-Identifier: GPL-2.0-only
3 * Copyright (C) 2011, Red Hat Inc, Arnaldo Carvalho de Melo <acme@redhat.com>
5 * Parts came from builtin-{top,stat,record}.c, see those files for further
12 #include <linux/bitops.h>
13 #include <api/fs/fs.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/compiler.h>
19 #include <linux/err.h>
20 #include <linux/zalloc.h>
21 #include <sys/ioctl.h>
22 #include <sys/resource.h>
23 #include <sys/types.h>
26 #include <perf/evsel.h>
28 #include "callchain.h"
34 #include "util/evsel_config.h"
35 #include "util/evsel_fprintf.h"
37 #include <perf/cpumap.h>
38 #include "thread_map.h"
40 #include "perf_regs.h"
43 #include "trace-event.h"
48 #include "../perf-sys.h"
49 #include "util/parse-branch-options.h"
50 #include <internal/xyarray.h>
51 #include <internal/lib.h>
53 #include <linux/ctype.h>
55 struct perf_missing_features perf_missing_features;
57 static clockid_t clockid;
59 static int evsel__no_extra_init(struct evsel *evsel __maybe_unused)
64 void __weak test_attr__ready(void) { }
66 static void evsel__no_extra_fini(struct evsel *evsel __maybe_unused)
72 int (*init)(struct evsel *evsel);
73 void (*fini)(struct evsel *evsel);
74 } perf_evsel__object = {
75 .size = sizeof(struct evsel),
76 .init = evsel__no_extra_init,
77 .fini = evsel__no_extra_fini,
80 int evsel__object_config(size_t object_size, int (*init)(struct evsel *evsel),
81 void (*fini)(struct evsel *evsel))
87 if (perf_evsel__object.size > object_size)
90 perf_evsel__object.size = object_size;
94 perf_evsel__object.init = init;
97 perf_evsel__object.fini = fini;
102 #define FD(e, x, y) (*(int *)xyarray__entry(e->core.fd, x, y))
104 int __evsel__sample_size(u64 sample_type)
106 u64 mask = sample_type & PERF_SAMPLE_MASK;
110 for (i = 0; i < 64; i++) {
111 if (mask & (1ULL << i))
121 * __perf_evsel__calc_id_pos - calculate id_pos.
122 * @sample_type: sample type
124 * This function returns the position of the event id (PERF_SAMPLE_ID or
125 * PERF_SAMPLE_IDENTIFIER) in a sample event i.e. in the array of struct
126 * perf_record_sample.
128 static int __perf_evsel__calc_id_pos(u64 sample_type)
132 if (sample_type & PERF_SAMPLE_IDENTIFIER)
135 if (!(sample_type & PERF_SAMPLE_ID))
138 if (sample_type & PERF_SAMPLE_IP)
141 if (sample_type & PERF_SAMPLE_TID)
144 if (sample_type & PERF_SAMPLE_TIME)
147 if (sample_type & PERF_SAMPLE_ADDR)
154 * __perf_evsel__calc_is_pos - calculate is_pos.
155 * @sample_type: sample type
157 * This function returns the position (counting backwards) of the event id
158 * (PERF_SAMPLE_ID or PERF_SAMPLE_IDENTIFIER) in a non-sample event i.e. if
159 * sample_id_all is used there is an id sample appended to non-sample events.
161 static int __perf_evsel__calc_is_pos(u64 sample_type)
165 if (sample_type & PERF_SAMPLE_IDENTIFIER)
168 if (!(sample_type & PERF_SAMPLE_ID))
171 if (sample_type & PERF_SAMPLE_CPU)
174 if (sample_type & PERF_SAMPLE_STREAM_ID)
180 void evsel__calc_id_pos(struct evsel *evsel)
182 evsel->id_pos = __perf_evsel__calc_id_pos(evsel->core.attr.sample_type);
183 evsel->is_pos = __perf_evsel__calc_is_pos(evsel->core.attr.sample_type);
186 void __evsel__set_sample_bit(struct evsel *evsel,
187 enum perf_event_sample_format bit)
189 if (!(evsel->core.attr.sample_type & bit)) {
190 evsel->core.attr.sample_type |= bit;
191 evsel->sample_size += sizeof(u64);
192 evsel__calc_id_pos(evsel);
196 void __evsel__reset_sample_bit(struct evsel *evsel,
197 enum perf_event_sample_format bit)
199 if (evsel->core.attr.sample_type & bit) {
200 evsel->core.attr.sample_type &= ~bit;
201 evsel->sample_size -= sizeof(u64);
202 evsel__calc_id_pos(evsel);
206 void evsel__set_sample_id(struct evsel *evsel,
207 bool can_sample_identifier)
209 if (can_sample_identifier) {
210 evsel__reset_sample_bit(evsel, ID);
211 evsel__set_sample_bit(evsel, IDENTIFIER);
213 evsel__set_sample_bit(evsel, ID);
215 evsel->core.attr.read_format |= PERF_FORMAT_ID;
219 * evsel__is_function_event - Return whether given evsel is a function
222 * @evsel - evsel selector to be tested
224 * Return %true if event is function trace event
226 bool evsel__is_function_event(struct evsel *evsel)
228 #define FUNCTION_EVENT "ftrace:function"
230 return evsel->name &&
231 !strncmp(FUNCTION_EVENT, evsel->name, sizeof(FUNCTION_EVENT));
233 #undef FUNCTION_EVENT
236 void evsel__init(struct evsel *evsel,
237 struct perf_event_attr *attr, int idx)
239 perf_evsel__init(&evsel->core, attr);
241 evsel->tracking = !idx;
242 evsel->leader = evsel;
245 evsel->max_events = ULONG_MAX;
246 evsel->evlist = NULL;
247 evsel->bpf_obj = NULL;
249 INIT_LIST_HEAD(&evsel->config_terms);
250 perf_evsel__object.init(evsel);
251 evsel->sample_size = __evsel__sample_size(attr->sample_type);
252 evsel__calc_id_pos(evsel);
253 evsel->cmdline_group_boundary = false;
254 evsel->metric_expr = NULL;
255 evsel->metric_name = NULL;
256 evsel->metric_events = NULL;
257 evsel->per_pkg_mask = NULL;
258 evsel->collect_stat = false;
259 evsel->pmu_name = NULL;
262 struct evsel *evsel__new_idx(struct perf_event_attr *attr, int idx)
264 struct evsel *evsel = zalloc(perf_evsel__object.size);
268 evsel__init(evsel, attr, idx);
270 if (evsel__is_bpf_output(evsel)) {
271 evsel->core.attr.sample_type |= (PERF_SAMPLE_RAW | PERF_SAMPLE_TIME |
272 PERF_SAMPLE_CPU | PERF_SAMPLE_PERIOD),
273 evsel->core.attr.sample_period = 1;
276 if (evsel__is_clock(evsel)) {
278 * The evsel->unit points to static alias->unit
279 * so it's ok to use static string in here.
281 static const char *unit = "msec";
290 static bool perf_event_can_profile_kernel(void)
292 return perf_event_paranoid_check(1);
295 struct evsel *evsel__new_cycles(bool precise)
297 struct perf_event_attr attr = {
298 .type = PERF_TYPE_HARDWARE,
299 .config = PERF_COUNT_HW_CPU_CYCLES,
300 .exclude_kernel = !perf_event_can_profile_kernel(),
304 event_attr_init(&attr);
310 * Now let the usual logic to set up the perf_event_attr defaults
311 * to kick in when we return and before perf_evsel__open() is called.
314 evsel = evsel__new(&attr);
318 evsel->precise_max = true;
320 /* use asprintf() because free(evsel) assumes name is allocated */
321 if (asprintf(&evsel->name, "cycles%s%s%.*s",
322 (attr.precise_ip || attr.exclude_kernel) ? ":" : "",
323 attr.exclude_kernel ? "u" : "",
324 attr.precise_ip ? attr.precise_ip + 1 : 0, "ppp") < 0)
329 evsel__delete(evsel);
335 * Returns pointer with encoded error via <linux/err.h> interface.
337 struct evsel *evsel__newtp_idx(const char *sys, const char *name, int idx)
339 struct evsel *evsel = zalloc(perf_evsel__object.size);
345 struct perf_event_attr attr = {
346 .type = PERF_TYPE_TRACEPOINT,
347 .sample_type = (PERF_SAMPLE_RAW | PERF_SAMPLE_TIME |
348 PERF_SAMPLE_CPU | PERF_SAMPLE_PERIOD),
351 if (asprintf(&evsel->name, "%s:%s", sys, name) < 0)
354 evsel->tp_format = trace_event__tp_format(sys, name);
355 if (IS_ERR(evsel->tp_format)) {
356 err = PTR_ERR(evsel->tp_format);
360 event_attr_init(&attr);
361 attr.config = evsel->tp_format->id;
362 attr.sample_period = 1;
363 evsel__init(evsel, &attr, idx);
375 const char *evsel__hw_names[PERF_COUNT_HW_MAX] = {
383 "stalled-cycles-frontend",
384 "stalled-cycles-backend",
388 static const char *__evsel__hw_name(u64 config)
390 if (config < PERF_COUNT_HW_MAX && evsel__hw_names[config])
391 return evsel__hw_names[config];
393 return "unknown-hardware";
396 static int perf_evsel__add_modifiers(struct evsel *evsel, char *bf, size_t size)
398 int colon = 0, r = 0;
399 struct perf_event_attr *attr = &evsel->core.attr;
400 bool exclude_guest_default = false;
402 #define MOD_PRINT(context, mod) do { \
403 if (!attr->exclude_##context) { \
404 if (!colon) colon = ++r; \
405 r += scnprintf(bf + r, size - r, "%c", mod); \
408 if (attr->exclude_kernel || attr->exclude_user || attr->exclude_hv) {
409 MOD_PRINT(kernel, 'k');
410 MOD_PRINT(user, 'u');
412 exclude_guest_default = true;
415 if (attr->precise_ip) {
418 r += scnprintf(bf + r, size - r, "%.*s", attr->precise_ip, "ppp");
419 exclude_guest_default = true;
422 if (attr->exclude_host || attr->exclude_guest == exclude_guest_default) {
423 MOD_PRINT(host, 'H');
424 MOD_PRINT(guest, 'G');
432 static int evsel__hw_name(struct evsel *evsel, char *bf, size_t size)
434 int r = scnprintf(bf, size, "%s", __evsel__hw_name(evsel->core.attr.config));
435 return r + perf_evsel__add_modifiers(evsel, bf + r, size - r);
438 const char *evsel__sw_names[PERF_COUNT_SW_MAX] = {
451 static const char *__evsel__sw_name(u64 config)
453 if (config < PERF_COUNT_SW_MAX && evsel__sw_names[config])
454 return evsel__sw_names[config];
455 return "unknown-software";
458 static int evsel__sw_name(struct evsel *evsel, char *bf, size_t size)
460 int r = scnprintf(bf, size, "%s", __evsel__sw_name(evsel->core.attr.config));
461 return r + perf_evsel__add_modifiers(evsel, bf + r, size - r);
464 static int __evsel__bp_name(char *bf, size_t size, u64 addr, u64 type)
468 r = scnprintf(bf, size, "mem:0x%" PRIx64 ":", addr);
470 if (type & HW_BREAKPOINT_R)
471 r += scnprintf(bf + r, size - r, "r");
473 if (type & HW_BREAKPOINT_W)
474 r += scnprintf(bf + r, size - r, "w");
476 if (type & HW_BREAKPOINT_X)
477 r += scnprintf(bf + r, size - r, "x");
482 static int evsel__bp_name(struct evsel *evsel, char *bf, size_t size)
484 struct perf_event_attr *attr = &evsel->core.attr;
485 int r = __evsel__bp_name(bf, size, attr->bp_addr, attr->bp_type);
486 return r + perf_evsel__add_modifiers(evsel, bf + r, size - r);
489 const char *evsel__hw_cache[PERF_COUNT_HW_CACHE_MAX][EVSEL__MAX_ALIASES] = {
490 { "L1-dcache", "l1-d", "l1d", "L1-data", },
491 { "L1-icache", "l1-i", "l1i", "L1-instruction", },
493 { "dTLB", "d-tlb", "Data-TLB", },
494 { "iTLB", "i-tlb", "Instruction-TLB", },
495 { "branch", "branches", "bpu", "btb", "bpc", },
499 const char *evsel__hw_cache_op[PERF_COUNT_HW_CACHE_OP_MAX][EVSEL__MAX_ALIASES] = {
500 { "load", "loads", "read", },
501 { "store", "stores", "write", },
502 { "prefetch", "prefetches", "speculative-read", "speculative-load", },
505 const char *evsel__hw_cache_result[PERF_COUNT_HW_CACHE_RESULT_MAX][EVSEL__MAX_ALIASES] = {
506 { "refs", "Reference", "ops", "access", },
507 { "misses", "miss", },
510 #define C(x) PERF_COUNT_HW_CACHE_##x
511 #define CACHE_READ (1 << C(OP_READ))
512 #define CACHE_WRITE (1 << C(OP_WRITE))
513 #define CACHE_PREFETCH (1 << C(OP_PREFETCH))
514 #define COP(x) (1 << x)
517 * cache operartion stat
518 * L1I : Read and prefetch only
519 * ITLB and BPU : Read-only
521 static unsigned long evsel__hw_cache_stat[C(MAX)] = {
522 [C(L1D)] = (CACHE_READ | CACHE_WRITE | CACHE_PREFETCH),
523 [C(L1I)] = (CACHE_READ | CACHE_PREFETCH),
524 [C(LL)] = (CACHE_READ | CACHE_WRITE | CACHE_PREFETCH),
525 [C(DTLB)] = (CACHE_READ | CACHE_WRITE | CACHE_PREFETCH),
526 [C(ITLB)] = (CACHE_READ),
527 [C(BPU)] = (CACHE_READ),
528 [C(NODE)] = (CACHE_READ | CACHE_WRITE | CACHE_PREFETCH),
531 bool evsel__is_cache_op_valid(u8 type, u8 op)
533 if (evsel__hw_cache_stat[type] & COP(op))
534 return true; /* valid */
536 return false; /* invalid */
539 int __evsel__hw_cache_type_op_res_name(u8 type, u8 op, u8 result, char *bf, size_t size)
542 return scnprintf(bf, size, "%s-%s-%s", evsel__hw_cache[type][0],
543 evsel__hw_cache_op[op][0],
544 evsel__hw_cache_result[result][0]);
547 return scnprintf(bf, size, "%s-%s", evsel__hw_cache[type][0],
548 evsel__hw_cache_op[op][1]);
551 static int __evsel__hw_cache_name(u64 config, char *bf, size_t size)
553 u8 op, result, type = (config >> 0) & 0xff;
554 const char *err = "unknown-ext-hardware-cache-type";
556 if (type >= PERF_COUNT_HW_CACHE_MAX)
559 op = (config >> 8) & 0xff;
560 err = "unknown-ext-hardware-cache-op";
561 if (op >= PERF_COUNT_HW_CACHE_OP_MAX)
564 result = (config >> 16) & 0xff;
565 err = "unknown-ext-hardware-cache-result";
566 if (result >= PERF_COUNT_HW_CACHE_RESULT_MAX)
569 err = "invalid-cache";
570 if (!evsel__is_cache_op_valid(type, op))
573 return __evsel__hw_cache_type_op_res_name(type, op, result, bf, size);
575 return scnprintf(bf, size, "%s", err);
578 static int evsel__hw_cache_name(struct evsel *evsel, char *bf, size_t size)
580 int ret = __evsel__hw_cache_name(evsel->core.attr.config, bf, size);
581 return ret + perf_evsel__add_modifiers(evsel, bf + ret, size - ret);
584 static int evsel__raw_name(struct evsel *evsel, char *bf, size_t size)
586 int ret = scnprintf(bf, size, "raw 0x%" PRIx64, evsel->core.attr.config);
587 return ret + perf_evsel__add_modifiers(evsel, bf + ret, size - ret);
590 static int evsel__tool_name(char *bf, size_t size)
592 int ret = scnprintf(bf, size, "duration_time");
596 const char *evsel__name(struct evsel *evsel)
606 switch (evsel->core.attr.type) {
608 evsel__raw_name(evsel, bf, sizeof(bf));
611 case PERF_TYPE_HARDWARE:
612 evsel__hw_name(evsel, bf, sizeof(bf));
615 case PERF_TYPE_HW_CACHE:
616 evsel__hw_cache_name(evsel, bf, sizeof(bf));
619 case PERF_TYPE_SOFTWARE:
620 if (evsel->tool_event)
621 evsel__tool_name(bf, sizeof(bf));
623 evsel__sw_name(evsel, bf, sizeof(bf));
626 case PERF_TYPE_TRACEPOINT:
627 scnprintf(bf, sizeof(bf), "%s", "unknown tracepoint");
630 case PERF_TYPE_BREAKPOINT:
631 evsel__bp_name(evsel, bf, sizeof(bf));
635 scnprintf(bf, sizeof(bf), "unknown attr type: %d",
636 evsel->core.attr.type);
640 evsel->name = strdup(bf);
648 const char *evsel__group_name(struct evsel *evsel)
650 return evsel->group_name ?: "anon group";
654 * Returns the group details for the specified leader,
655 * with following rules.
657 * For record -e '{cycles,instructions}'
658 * 'anon group { cycles:u, instructions:u }'
660 * For record -e 'cycles,instructions' and report --group
661 * 'cycles:u, instructions:u'
663 int evsel__group_desc(struct evsel *evsel, char *buf, size_t size)
667 const char *group_name = evsel__group_name(evsel);
669 if (!evsel->forced_leader)
670 ret = scnprintf(buf, size, "%s { ", group_name);
672 ret += scnprintf(buf + ret, size - ret, "%s", evsel__name(evsel));
674 for_each_group_member(pos, evsel)
675 ret += scnprintf(buf + ret, size - ret, ", %s", evsel__name(pos));
677 if (!evsel->forced_leader)
678 ret += scnprintf(buf + ret, size - ret, " }");
683 static void __evsel__config_callchain(struct evsel *evsel, struct record_opts *opts,
684 struct callchain_param *param)
686 bool function = evsel__is_function_event(evsel);
687 struct perf_event_attr *attr = &evsel->core.attr;
689 evsel__set_sample_bit(evsel, CALLCHAIN);
691 attr->sample_max_stack = param->max_stack;
693 if (opts->kernel_callchains)
694 attr->exclude_callchain_user = 1;
695 if (opts->user_callchains)
696 attr->exclude_callchain_kernel = 1;
697 if (param->record_mode == CALLCHAIN_LBR) {
698 if (!opts->branch_stack) {
699 if (attr->exclude_user) {
700 pr_warning("LBR callstack option is only available "
701 "to get user callchain information. "
702 "Falling back to framepointers.\n");
704 evsel__set_sample_bit(evsel, BRANCH_STACK);
705 attr->branch_sample_type = PERF_SAMPLE_BRANCH_USER |
706 PERF_SAMPLE_BRANCH_CALL_STACK |
707 PERF_SAMPLE_BRANCH_NO_CYCLES |
708 PERF_SAMPLE_BRANCH_NO_FLAGS |
709 PERF_SAMPLE_BRANCH_HW_INDEX;
712 pr_warning("Cannot use LBR callstack with branch stack. "
713 "Falling back to framepointers.\n");
716 if (param->record_mode == CALLCHAIN_DWARF) {
718 evsel__set_sample_bit(evsel, REGS_USER);
719 evsel__set_sample_bit(evsel, STACK_USER);
720 if (opts->sample_user_regs && DWARF_MINIMAL_REGS != PERF_REGS_MASK) {
721 attr->sample_regs_user |= DWARF_MINIMAL_REGS;
722 pr_warning("WARNING: The use of --call-graph=dwarf may require all the user registers, "
723 "specifying a subset with --user-regs may render DWARF unwinding unreliable, "
724 "so the minimal registers set (IP, SP) is explicitly forced.\n");
726 attr->sample_regs_user |= PERF_REGS_MASK;
728 attr->sample_stack_user = param->dump_size;
729 attr->exclude_callchain_user = 1;
731 pr_info("Cannot use DWARF unwind for function trace event,"
732 " falling back to framepointers.\n");
737 pr_info("Disabling user space callchains for function trace event.\n");
738 attr->exclude_callchain_user = 1;
742 void evsel__config_callchain(struct evsel *evsel, struct record_opts *opts,
743 struct callchain_param *param)
746 return __evsel__config_callchain(evsel, opts, param);
750 perf_evsel__reset_callgraph(struct evsel *evsel,
751 struct callchain_param *param)
753 struct perf_event_attr *attr = &evsel->core.attr;
755 evsel__reset_sample_bit(evsel, CALLCHAIN);
756 if (param->record_mode == CALLCHAIN_LBR) {
757 evsel__reset_sample_bit(evsel, BRANCH_STACK);
758 attr->branch_sample_type &= ~(PERF_SAMPLE_BRANCH_USER |
759 PERF_SAMPLE_BRANCH_CALL_STACK |
760 PERF_SAMPLE_BRANCH_HW_INDEX);
762 if (param->record_mode == CALLCHAIN_DWARF) {
763 evsel__reset_sample_bit(evsel, REGS_USER);
764 evsel__reset_sample_bit(evsel, STACK_USER);
768 static void evsel__apply_config_terms(struct evsel *evsel,
769 struct record_opts *opts, bool track)
771 struct evsel_config_term *term;
772 struct list_head *config_terms = &evsel->config_terms;
773 struct perf_event_attr *attr = &evsel->core.attr;
774 /* callgraph default */
775 struct callchain_param param = {
776 .record_mode = callchain_param.record_mode,
780 const char *callgraph_buf = NULL;
782 list_for_each_entry(term, config_terms, list) {
783 switch (term->type) {
784 case EVSEL__CONFIG_TERM_PERIOD:
785 if (!(term->weak && opts->user_interval != ULLONG_MAX)) {
786 attr->sample_period = term->val.period;
788 evsel__reset_sample_bit(evsel, PERIOD);
791 case EVSEL__CONFIG_TERM_FREQ:
792 if (!(term->weak && opts->user_freq != UINT_MAX)) {
793 attr->sample_freq = term->val.freq;
795 evsel__set_sample_bit(evsel, PERIOD);
798 case EVSEL__CONFIG_TERM_TIME:
800 evsel__set_sample_bit(evsel, TIME);
802 evsel__reset_sample_bit(evsel, TIME);
804 case EVSEL__CONFIG_TERM_CALLGRAPH:
805 callgraph_buf = term->val.str;
807 case EVSEL__CONFIG_TERM_BRANCH:
808 if (term->val.str && strcmp(term->val.str, "no")) {
809 evsel__set_sample_bit(evsel, BRANCH_STACK);
810 parse_branch_str(term->val.str,
811 &attr->branch_sample_type);
813 evsel__reset_sample_bit(evsel, BRANCH_STACK);
815 case EVSEL__CONFIG_TERM_STACK_USER:
816 dump_size = term->val.stack_user;
818 case EVSEL__CONFIG_TERM_MAX_STACK:
819 max_stack = term->val.max_stack;
821 case EVSEL__CONFIG_TERM_MAX_EVENTS:
822 evsel->max_events = term->val.max_events;
824 case EVSEL__CONFIG_TERM_INHERIT:
826 * attr->inherit should has already been set by
827 * evsel__config. If user explicitly set
828 * inherit using config terms, override global
829 * opt->no_inherit setting.
831 attr->inherit = term->val.inherit ? 1 : 0;
833 case EVSEL__CONFIG_TERM_OVERWRITE:
834 attr->write_backward = term->val.overwrite ? 1 : 0;
836 case EVSEL__CONFIG_TERM_DRV_CFG:
838 case EVSEL__CONFIG_TERM_PERCORE:
840 case EVSEL__CONFIG_TERM_AUX_OUTPUT:
841 attr->aux_output = term->val.aux_output ? 1 : 0;
843 case EVSEL__CONFIG_TERM_AUX_SAMPLE_SIZE:
844 /* Already applied by auxtrace */
846 case EVSEL__CONFIG_TERM_CFG_CHG:
853 /* User explicitly set per-event callgraph, clear the old setting and reset. */
854 if ((callgraph_buf != NULL) || (dump_size > 0) || max_stack) {
855 bool sample_address = false;
858 param.max_stack = max_stack;
859 if (callgraph_buf == NULL)
860 callgraph_buf = "fp";
863 /* parse callgraph parameters */
864 if (callgraph_buf != NULL) {
865 if (!strcmp(callgraph_buf, "no")) {
866 param.enabled = false;
867 param.record_mode = CALLCHAIN_NONE;
869 param.enabled = true;
870 if (parse_callchain_record(callgraph_buf, ¶m)) {
871 pr_err("per-event callgraph setting for %s failed. "
872 "Apply callgraph global setting for it\n",
876 if (param.record_mode == CALLCHAIN_DWARF)
877 sample_address = true;
881 dump_size = round_up(dump_size, sizeof(u64));
882 param.dump_size = dump_size;
885 /* If global callgraph set, clear it */
886 if (callchain_param.enabled)
887 perf_evsel__reset_callgraph(evsel, &callchain_param);
889 /* set perf-event callgraph */
891 if (sample_address) {
892 evsel__set_sample_bit(evsel, ADDR);
893 evsel__set_sample_bit(evsel, DATA_SRC);
894 evsel->core.attr.mmap_data = track;
896 evsel__config_callchain(evsel, opts, ¶m);
901 static bool is_dummy_event(struct evsel *evsel)
903 return (evsel->core.attr.type == PERF_TYPE_SOFTWARE) &&
904 (evsel->core.attr.config == PERF_COUNT_SW_DUMMY);
907 struct evsel_config_term *__evsel__get_config_term(struct evsel *evsel, enum evsel_term_type type)
909 struct evsel_config_term *term, *found_term = NULL;
911 list_for_each_entry(term, &evsel->config_terms, list) {
912 if (term->type == type)
920 * The enable_on_exec/disabled value strategy:
922 * 1) For any type of traced program:
923 * - all independent events and group leaders are disabled
924 * - all group members are enabled
926 * Group members are ruled by group leaders. They need to
927 * be enabled, because the group scheduling relies on that.
929 * 2) For traced programs executed by perf:
930 * - all independent events and group leaders have
932 * - we don't specifically enable or disable any event during
935 * Independent events and group leaders are initially disabled
936 * and get enabled by exec. Group members are ruled by group
937 * leaders as stated in 1).
939 * 3) For traced programs attached by perf (pid/tid):
940 * - we specifically enable or disable all events during
943 * When attaching events to already running traced we
944 * enable/disable events specifically, as there's no
945 * initial traced exec call.
947 void evsel__config(struct evsel *evsel, struct record_opts *opts,
948 struct callchain_param *callchain)
950 struct evsel *leader = evsel->leader;
951 struct perf_event_attr *attr = &evsel->core.attr;
952 int track = evsel->tracking;
953 bool per_cpu = opts->target.default_per_cpu && !opts->target.per_thread;
955 attr->sample_id_all = perf_missing_features.sample_id_all ? 0 : 1;
956 attr->inherit = !opts->no_inherit;
957 attr->write_backward = opts->overwrite ? 1 : 0;
959 evsel__set_sample_bit(evsel, IP);
960 evsel__set_sample_bit(evsel, TID);
962 if (evsel->sample_read) {
963 evsel__set_sample_bit(evsel, READ);
966 * We need ID even in case of single event, because
967 * PERF_SAMPLE_READ process ID specific data.
969 evsel__set_sample_id(evsel, false);
972 * Apply group format only if we belong to group
973 * with more than one members.
975 if (leader->core.nr_members > 1) {
976 attr->read_format |= PERF_FORMAT_GROUP;
982 * We default some events to have a default interval. But keep
983 * it a weak assumption overridable by the user.
985 if (!attr->sample_period || (opts->user_freq != UINT_MAX ||
986 opts->user_interval != ULLONG_MAX)) {
988 evsel__set_sample_bit(evsel, PERIOD);
990 attr->sample_freq = opts->freq;
992 attr->sample_period = opts->default_interval;
996 if (opts->no_samples)
997 attr->sample_freq = 0;
999 if (opts->inherit_stat) {
1000 evsel->core.attr.read_format |=
1001 PERF_FORMAT_TOTAL_TIME_ENABLED |
1002 PERF_FORMAT_TOTAL_TIME_RUNNING |
1004 attr->inherit_stat = 1;
1007 if (opts->sample_address) {
1008 evsel__set_sample_bit(evsel, ADDR);
1009 attr->mmap_data = track;
1013 * We don't allow user space callchains for function trace
1014 * event, due to issues with page faults while tracing page
1015 * fault handler and its overall trickiness nature.
1017 if (evsel__is_function_event(evsel))
1018 evsel->core.attr.exclude_callchain_user = 1;
1020 if (callchain && callchain->enabled && !evsel->no_aux_samples)
1021 evsel__config_callchain(evsel, opts, callchain);
1023 if (opts->sample_intr_regs) {
1024 attr->sample_regs_intr = opts->sample_intr_regs;
1025 evsel__set_sample_bit(evsel, REGS_INTR);
1028 if (opts->sample_user_regs) {
1029 attr->sample_regs_user |= opts->sample_user_regs;
1030 evsel__set_sample_bit(evsel, REGS_USER);
1033 if (target__has_cpu(&opts->target) || opts->sample_cpu)
1034 evsel__set_sample_bit(evsel, CPU);
1037 * When the user explicitly disabled time don't force it here.
1039 if (opts->sample_time &&
1040 (!perf_missing_features.sample_id_all &&
1041 (!opts->no_inherit || target__has_cpu(&opts->target) || per_cpu ||
1042 opts->sample_time_set)))
1043 evsel__set_sample_bit(evsel, TIME);
1045 if (opts->raw_samples && !evsel->no_aux_samples) {
1046 evsel__set_sample_bit(evsel, TIME);
1047 evsel__set_sample_bit(evsel, RAW);
1048 evsel__set_sample_bit(evsel, CPU);
1051 if (opts->sample_address)
1052 evsel__set_sample_bit(evsel, DATA_SRC);
1054 if (opts->sample_phys_addr)
1055 evsel__set_sample_bit(evsel, PHYS_ADDR);
1057 if (opts->no_buffering) {
1058 attr->watermark = 0;
1059 attr->wakeup_events = 1;
1061 if (opts->branch_stack && !evsel->no_aux_samples) {
1062 evsel__set_sample_bit(evsel, BRANCH_STACK);
1063 attr->branch_sample_type = opts->branch_stack;
1066 if (opts->sample_weight)
1067 evsel__set_sample_bit(evsel, WEIGHT);
1071 attr->mmap2 = track && !perf_missing_features.mmap2;
1073 attr->ksymbol = track && !perf_missing_features.ksymbol;
1074 attr->bpf_event = track && !opts->no_bpf_event && !perf_missing_features.bpf;
1076 if (opts->record_namespaces)
1077 attr->namespaces = track;
1079 if (opts->record_cgroup) {
1080 attr->cgroup = track && !perf_missing_features.cgroup;
1081 evsel__set_sample_bit(evsel, CGROUP);
1084 if (opts->record_switch_events)
1085 attr->context_switch = track;
1087 if (opts->sample_transaction)
1088 evsel__set_sample_bit(evsel, TRANSACTION);
1090 if (opts->running_time) {
1091 evsel->core.attr.read_format |=
1092 PERF_FORMAT_TOTAL_TIME_ENABLED |
1093 PERF_FORMAT_TOTAL_TIME_RUNNING;
1097 * XXX see the function comment above
1099 * Disabling only independent events or group leaders,
1100 * keeping group members enabled.
1102 if (evsel__is_group_leader(evsel))
1106 * Setting enable_on_exec for independent events and
1107 * group leaders for traced executed by perf.
1109 if (target__none(&opts->target) && evsel__is_group_leader(evsel) &&
1110 !opts->initial_delay)
1111 attr->enable_on_exec = 1;
1113 if (evsel->immediate) {
1115 attr->enable_on_exec = 0;
1118 clockid = opts->clockid;
1119 if (opts->use_clockid) {
1120 attr->use_clockid = 1;
1121 attr->clockid = opts->clockid;
1124 if (evsel->precise_max)
1125 attr->precise_ip = 3;
1127 if (opts->all_user) {
1128 attr->exclude_kernel = 1;
1129 attr->exclude_user = 0;
1132 if (opts->all_kernel) {
1133 attr->exclude_kernel = 0;
1134 attr->exclude_user = 1;
1137 if (evsel->core.own_cpus || evsel->unit)
1138 evsel->core.attr.read_format |= PERF_FORMAT_ID;
1141 * Apply event specific term settings,
1142 * it overloads any global configuration.
1144 evsel__apply_config_terms(evsel, opts, track);
1146 evsel->ignore_missing_thread = opts->ignore_missing_thread;
1148 /* The --period option takes the precedence. */
1149 if (opts->period_set) {
1151 evsel__set_sample_bit(evsel, PERIOD);
1153 evsel__reset_sample_bit(evsel, PERIOD);
1157 * A dummy event never triggers any actual counter and therefore
1158 * cannot be used with branch_stack.
1160 * For initial_delay, a dummy event is added implicitly.
1161 * The software event will trigger -EOPNOTSUPP error out,
1162 * if BRANCH_STACK bit is set.
1164 if (is_dummy_event(evsel))
1165 evsel__reset_sample_bit(evsel, BRANCH_STACK);
1168 int evsel__set_filter(struct evsel *evsel, const char *filter)
1170 char *new_filter = strdup(filter);
1172 if (new_filter != NULL) {
1173 free(evsel->filter);
1174 evsel->filter = new_filter;
1181 static int evsel__append_filter(struct evsel *evsel, const char *fmt, const char *filter)
1185 if (evsel->filter == NULL)
1186 return evsel__set_filter(evsel, filter);
1188 if (asprintf(&new_filter, fmt, evsel->filter, filter) > 0) {
1189 free(evsel->filter);
1190 evsel->filter = new_filter;
1197 int evsel__append_tp_filter(struct evsel *evsel, const char *filter)
1199 return evsel__append_filter(evsel, "(%s) && (%s)", filter);
1202 int evsel__append_addr_filter(struct evsel *evsel, const char *filter)
1204 return evsel__append_filter(evsel, "%s,%s", filter);
1207 /* Caller has to clear disabled after going through all CPUs. */
1208 int evsel__enable_cpu(struct evsel *evsel, int cpu)
1210 return perf_evsel__enable_cpu(&evsel->core, cpu);
1213 int evsel__enable(struct evsel *evsel)
1215 int err = perf_evsel__enable(&evsel->core);
1218 evsel->disabled = false;
1222 /* Caller has to set disabled after going through all CPUs. */
1223 int evsel__disable_cpu(struct evsel *evsel, int cpu)
1225 return perf_evsel__disable_cpu(&evsel->core, cpu);
1228 int evsel__disable(struct evsel *evsel)
1230 int err = perf_evsel__disable(&evsel->core);
1232 * We mark it disabled here so that tools that disable a event can
1233 * ignore events after they disable it. I.e. the ring buffer may have
1234 * already a few more events queued up before the kernel got the stop
1238 evsel->disabled = true;
1243 static void evsel__free_config_terms(struct evsel *evsel)
1245 struct evsel_config_term *term, *h;
1247 list_for_each_entry_safe(term, h, &evsel->config_terms, list) {
1248 list_del_init(&term->list);
1250 zfree(&term->val.str);
1255 void evsel__exit(struct evsel *evsel)
1257 assert(list_empty(&evsel->core.node));
1258 assert(evsel->evlist == NULL);
1259 evsel__free_counts(evsel);
1260 perf_evsel__free_fd(&evsel->core);
1261 perf_evsel__free_id(&evsel->core);
1262 evsel__free_config_terms(evsel);
1263 cgroup__put(evsel->cgrp);
1264 perf_cpu_map__put(evsel->core.cpus);
1265 perf_cpu_map__put(evsel->core.own_cpus);
1266 perf_thread_map__put(evsel->core.threads);
1267 zfree(&evsel->group_name);
1268 zfree(&evsel->name);
1269 zfree(&evsel->pmu_name);
1270 zfree(&evsel->per_pkg_mask);
1271 zfree(&evsel->metric_events);
1272 perf_evsel__object.fini(evsel);
1275 void evsel__delete(struct evsel *evsel)
1281 void evsel__compute_deltas(struct evsel *evsel, int cpu, int thread,
1282 struct perf_counts_values *count)
1284 struct perf_counts_values tmp;
1286 if (!evsel->prev_raw_counts)
1290 tmp = evsel->prev_raw_counts->aggr;
1291 evsel->prev_raw_counts->aggr = *count;
1293 tmp = *perf_counts(evsel->prev_raw_counts, cpu, thread);
1294 *perf_counts(evsel->prev_raw_counts, cpu, thread) = *count;
1297 count->val = count->val - tmp.val;
1298 count->ena = count->ena - tmp.ena;
1299 count->run = count->run - tmp.run;
1302 void perf_counts_values__scale(struct perf_counts_values *count,
1303 bool scale, s8 *pscaled)
1308 if (count->run == 0) {
1311 } else if (count->run < count->ena) {
1313 count->val = (u64)((double) count->val * count->ena / count->run);
1321 static int evsel__read_one(struct evsel *evsel, int cpu, int thread)
1323 struct perf_counts_values *count = perf_counts(evsel->counts, cpu, thread);
1325 return perf_evsel__read(&evsel->core, cpu, thread, count);
1329 perf_evsel__set_count(struct evsel *counter, int cpu, int thread,
1330 u64 val, u64 ena, u64 run)
1332 struct perf_counts_values *count;
1334 count = perf_counts(counter->counts, cpu, thread);
1340 perf_counts__set_loaded(counter->counts, cpu, thread, true);
1344 perf_evsel__process_group_data(struct evsel *leader,
1345 int cpu, int thread, u64 *data)
1347 u64 read_format = leader->core.attr.read_format;
1348 struct sample_read_value *v;
1349 u64 nr, ena = 0, run = 0, i;
1353 if (nr != (u64) leader->core.nr_members)
1356 if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED)
1359 if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING)
1362 v = (struct sample_read_value *) data;
1364 perf_evsel__set_count(leader, cpu, thread,
1365 v[0].value, ena, run);
1367 for (i = 1; i < nr; i++) {
1368 struct evsel *counter;
1370 counter = perf_evlist__id2evsel(leader->evlist, v[i].id);
1374 perf_evsel__set_count(counter, cpu, thread,
1375 v[i].value, ena, run);
1381 static int evsel__read_group(struct evsel *leader, int cpu, int thread)
1383 struct perf_stat_evsel *ps = leader->stats;
1384 u64 read_format = leader->core.attr.read_format;
1385 int size = perf_evsel__read_size(&leader->core);
1386 u64 *data = ps->group_data;
1388 if (!(read_format & PERF_FORMAT_ID))
1391 if (!evsel__is_group_leader(leader))
1395 data = zalloc(size);
1399 ps->group_data = data;
1402 if (FD(leader, cpu, thread) < 0)
1405 if (readn(FD(leader, cpu, thread), data, size) <= 0)
1408 return perf_evsel__process_group_data(leader, cpu, thread, data);
1411 int evsel__read_counter(struct evsel *evsel, int cpu, int thread)
1413 u64 read_format = evsel->core.attr.read_format;
1415 if (read_format & PERF_FORMAT_GROUP)
1416 return evsel__read_group(evsel, cpu, thread);
1418 return evsel__read_one(evsel, cpu, thread);
1421 int __evsel__read_on_cpu(struct evsel *evsel, int cpu, int thread, bool scale)
1423 struct perf_counts_values count;
1424 size_t nv = scale ? 3 : 1;
1426 if (FD(evsel, cpu, thread) < 0)
1429 if (evsel->counts == NULL && evsel__alloc_counts(evsel, cpu + 1, thread + 1) < 0)
1432 if (readn(FD(evsel, cpu, thread), &count, nv * sizeof(u64)) <= 0)
1435 evsel__compute_deltas(evsel, cpu, thread, &count);
1436 perf_counts_values__scale(&count, scale, NULL);
1437 *perf_counts(evsel->counts, cpu, thread) = count;
1441 static int get_group_fd(struct evsel *evsel, int cpu, int thread)
1443 struct evsel *leader = evsel->leader;
1446 if (evsel__is_group_leader(evsel))
1450 * Leader must be already processed/open,
1451 * if not it's a bug.
1453 BUG_ON(!leader->core.fd);
1455 fd = FD(leader, cpu, thread);
1461 static void perf_evsel__remove_fd(struct evsel *pos,
1462 int nr_cpus, int nr_threads,
1465 for (int cpu = 0; cpu < nr_cpus; cpu++)
1466 for (int thread = thread_idx; thread < nr_threads - 1; thread++)
1467 FD(pos, cpu, thread) = FD(pos, cpu, thread + 1);
1470 static int update_fds(struct evsel *evsel,
1471 int nr_cpus, int cpu_idx,
1472 int nr_threads, int thread_idx)
1476 if (cpu_idx >= nr_cpus || thread_idx >= nr_threads)
1479 evlist__for_each_entry(evsel->evlist, pos) {
1480 nr_cpus = pos != evsel ? nr_cpus : cpu_idx;
1482 perf_evsel__remove_fd(pos, nr_cpus, nr_threads, thread_idx);
1485 * Since fds for next evsel has not been created,
1486 * there is no need to iterate whole event list.
1494 static bool ignore_missing_thread(struct evsel *evsel,
1495 int nr_cpus, int cpu,
1496 struct perf_thread_map *threads,
1497 int thread, int err)
1499 pid_t ignore_pid = perf_thread_map__pid(threads, thread);
1501 if (!evsel->ignore_missing_thread)
1504 /* The system wide setup does not work with threads. */
1505 if (evsel->core.system_wide)
1508 /* The -ESRCH is perf event syscall errno for pid's not found. */
1512 /* If there's only one thread, let it fail. */
1513 if (threads->nr == 1)
1517 * We should remove fd for missing_thread first
1518 * because thread_map__remove() will decrease threads->nr.
1520 if (update_fds(evsel, nr_cpus, cpu, threads->nr, thread))
1523 if (thread_map__remove(threads, thread))
1526 pr_warning("WARNING: Ignored open failure for pid %d\n",
1531 static int __open_attr__fprintf(FILE *fp, const char *name, const char *val,
1532 void *priv __maybe_unused)
1534 return fprintf(fp, " %-32s %s\n", name, val);
1537 static void display_attr(struct perf_event_attr *attr)
1539 if (verbose >= 2 || debug_peo_args) {
1540 fprintf(stderr, "%.60s\n", graph_dotted_line);
1541 fprintf(stderr, "perf_event_attr:\n");
1542 perf_event_attr__fprintf(stderr, attr, __open_attr__fprintf, NULL);
1543 fprintf(stderr, "%.60s\n", graph_dotted_line);
1547 static int perf_event_open(struct evsel *evsel,
1548 pid_t pid, int cpu, int group_fd,
1549 unsigned long flags)
1551 int precise_ip = evsel->core.attr.precise_ip;
1555 pr_debug2_peo("sys_perf_event_open: pid %d cpu %d group_fd %d flags %#lx",
1556 pid, cpu, group_fd, flags);
1558 fd = sys_perf_event_open(&evsel->core.attr, pid, cpu, group_fd, flags);
1562 /* Do not try less precise if not requested. */
1563 if (!evsel->precise_max)
1567 * We tried all the precise_ip values, and it's
1568 * still failing, so leave it to standard fallback.
1570 if (!evsel->core.attr.precise_ip) {
1571 evsel->core.attr.precise_ip = precise_ip;
1575 pr_debug2_peo("\nsys_perf_event_open failed, error %d\n", -ENOTSUP);
1576 evsel->core.attr.precise_ip--;
1577 pr_debug2_peo("decreasing precise_ip by one (%d)\n", evsel->core.attr.precise_ip);
1578 display_attr(&evsel->core.attr);
1584 static int evsel__open_cpu(struct evsel *evsel, struct perf_cpu_map *cpus,
1585 struct perf_thread_map *threads,
1586 int start_cpu, int end_cpu)
1588 int cpu, thread, nthreads;
1589 unsigned long flags = PERF_FLAG_FD_CLOEXEC;
1590 int pid = -1, err, old_errno;
1591 enum { NO_CHANGE, SET_TO_MAX, INCREASED_MAX } set_rlimit = NO_CHANGE;
1593 if ((perf_missing_features.write_backward && evsel->core.attr.write_backward) ||
1594 (perf_missing_features.aux_output && evsel->core.attr.aux_output))
1598 static struct perf_cpu_map *empty_cpu_map;
1600 if (empty_cpu_map == NULL) {
1601 empty_cpu_map = perf_cpu_map__dummy_new();
1602 if (empty_cpu_map == NULL)
1606 cpus = empty_cpu_map;
1609 if (threads == NULL) {
1610 static struct perf_thread_map *empty_thread_map;
1612 if (empty_thread_map == NULL) {
1613 empty_thread_map = thread_map__new_by_tid(-1);
1614 if (empty_thread_map == NULL)
1618 threads = empty_thread_map;
1621 if (evsel->core.system_wide)
1624 nthreads = threads->nr;
1626 if (evsel->core.fd == NULL &&
1627 perf_evsel__alloc_fd(&evsel->core, cpus->nr, nthreads) < 0)
1631 flags |= PERF_FLAG_PID_CGROUP;
1632 pid = evsel->cgrp->fd;
1635 fallback_missing_features:
1636 if (perf_missing_features.clockid_wrong)
1637 evsel->core.attr.clockid = CLOCK_MONOTONIC; /* should always work */
1638 if (perf_missing_features.clockid) {
1639 evsel->core.attr.use_clockid = 0;
1640 evsel->core.attr.clockid = 0;
1642 if (perf_missing_features.cloexec)
1643 flags &= ~(unsigned long)PERF_FLAG_FD_CLOEXEC;
1644 if (perf_missing_features.mmap2)
1645 evsel->core.attr.mmap2 = 0;
1646 if (perf_missing_features.exclude_guest)
1647 evsel->core.attr.exclude_guest = evsel->core.attr.exclude_host = 0;
1648 if (perf_missing_features.lbr_flags)
1649 evsel->core.attr.branch_sample_type &= ~(PERF_SAMPLE_BRANCH_NO_FLAGS |
1650 PERF_SAMPLE_BRANCH_NO_CYCLES);
1651 if (perf_missing_features.group_read && evsel->core.attr.inherit)
1652 evsel->core.attr.read_format &= ~(PERF_FORMAT_GROUP|PERF_FORMAT_ID);
1653 if (perf_missing_features.ksymbol)
1654 evsel->core.attr.ksymbol = 0;
1655 if (perf_missing_features.bpf)
1656 evsel->core.attr.bpf_event = 0;
1657 if (perf_missing_features.branch_hw_idx)
1658 evsel->core.attr.branch_sample_type &= ~PERF_SAMPLE_BRANCH_HW_INDEX;
1660 if (perf_missing_features.sample_id_all)
1661 evsel->core.attr.sample_id_all = 0;
1663 display_attr(&evsel->core.attr);
1665 for (cpu = start_cpu; cpu < end_cpu; cpu++) {
1667 for (thread = 0; thread < nthreads; thread++) {
1670 if (!evsel->cgrp && !evsel->core.system_wide)
1671 pid = perf_thread_map__pid(threads, thread);
1673 group_fd = get_group_fd(evsel, cpu, thread);
1677 fd = perf_event_open(evsel, pid, cpus->map[cpu],
1680 FD(evsel, cpu, thread) = fd;
1685 if (ignore_missing_thread(evsel, cpus->nr, cpu, threads, thread, err)) {
1687 * We just removed 1 thread, so take a step
1688 * back on thread index and lower the upper
1694 /* ... and pretend like nothing have happened. */
1699 pr_debug2_peo("\nsys_perf_event_open failed, error %d\n",
1704 pr_debug2_peo(" = %d\n", fd);
1706 if (evsel->bpf_fd >= 0) {
1708 int bpf_fd = evsel->bpf_fd;
1711 PERF_EVENT_IOC_SET_BPF,
1713 if (err && errno != EEXIST) {
1714 pr_err("failed to attach bpf fd %d: %s\n",
1715 bpf_fd, strerror(errno));
1721 set_rlimit = NO_CHANGE;
1724 * If we succeeded but had to kill clockid, fail and
1725 * have evsel__open_strerror() print us a nice error.
1727 if (perf_missing_features.clockid ||
1728 perf_missing_features.clockid_wrong) {
1739 * perf stat needs between 5 and 22 fds per CPU. When we run out
1740 * of them try to increase the limits.
1742 if (err == -EMFILE && set_rlimit < INCREASED_MAX) {
1746 if (getrlimit(RLIMIT_NOFILE, &l) == 0) {
1747 if (set_rlimit == NO_CHANGE)
1748 l.rlim_cur = l.rlim_max;
1750 l.rlim_cur = l.rlim_max + 1000;
1751 l.rlim_max = l.rlim_cur;
1753 if (setrlimit(RLIMIT_NOFILE, &l) == 0) {
1762 if (err != -EINVAL || cpu > 0 || thread > 0)
1766 * Must probe features in the order they were added to the
1767 * perf_event_attr interface.
1769 if (!perf_missing_features.cgroup && evsel->core.attr.cgroup) {
1770 perf_missing_features.cgroup = true;
1771 pr_debug2_peo("Kernel has no cgroup sampling support, bailing out\n");
1773 } else if (!perf_missing_features.branch_hw_idx &&
1774 (evsel->core.attr.branch_sample_type & PERF_SAMPLE_BRANCH_HW_INDEX)) {
1775 perf_missing_features.branch_hw_idx = true;
1776 pr_debug2("switching off branch HW index support\n");
1777 goto fallback_missing_features;
1778 } else if (!perf_missing_features.aux_output && evsel->core.attr.aux_output) {
1779 perf_missing_features.aux_output = true;
1780 pr_debug2_peo("Kernel has no attr.aux_output support, bailing out\n");
1782 } else if (!perf_missing_features.bpf && evsel->core.attr.bpf_event) {
1783 perf_missing_features.bpf = true;
1784 pr_debug2_peo("switching off bpf_event\n");
1785 goto fallback_missing_features;
1786 } else if (!perf_missing_features.ksymbol && evsel->core.attr.ksymbol) {
1787 perf_missing_features.ksymbol = true;
1788 pr_debug2_peo("switching off ksymbol\n");
1789 goto fallback_missing_features;
1790 } else if (!perf_missing_features.write_backward && evsel->core.attr.write_backward) {
1791 perf_missing_features.write_backward = true;
1792 pr_debug2_peo("switching off write_backward\n");
1794 } else if (!perf_missing_features.clockid_wrong && evsel->core.attr.use_clockid) {
1795 perf_missing_features.clockid_wrong = true;
1796 pr_debug2_peo("switching off clockid\n");
1797 goto fallback_missing_features;
1798 } else if (!perf_missing_features.clockid && evsel->core.attr.use_clockid) {
1799 perf_missing_features.clockid = true;
1800 pr_debug2_peo("switching off use_clockid\n");
1801 goto fallback_missing_features;
1802 } else if (!perf_missing_features.cloexec && (flags & PERF_FLAG_FD_CLOEXEC)) {
1803 perf_missing_features.cloexec = true;
1804 pr_debug2_peo("switching off cloexec flag\n");
1805 goto fallback_missing_features;
1806 } else if (!perf_missing_features.mmap2 && evsel->core.attr.mmap2) {
1807 perf_missing_features.mmap2 = true;
1808 pr_debug2_peo("switching off mmap2\n");
1809 goto fallback_missing_features;
1810 } else if (!perf_missing_features.exclude_guest &&
1811 (evsel->core.attr.exclude_guest || evsel->core.attr.exclude_host)) {
1812 perf_missing_features.exclude_guest = true;
1813 pr_debug2_peo("switching off exclude_guest, exclude_host\n");
1814 goto fallback_missing_features;
1815 } else if (!perf_missing_features.sample_id_all) {
1816 perf_missing_features.sample_id_all = true;
1817 pr_debug2_peo("switching off sample_id_all\n");
1818 goto retry_sample_id;
1819 } else if (!perf_missing_features.lbr_flags &&
1820 (evsel->core.attr.branch_sample_type &
1821 (PERF_SAMPLE_BRANCH_NO_CYCLES |
1822 PERF_SAMPLE_BRANCH_NO_FLAGS))) {
1823 perf_missing_features.lbr_flags = true;
1824 pr_debug2_peo("switching off branch sample type no (cycles/flags)\n");
1825 goto fallback_missing_features;
1826 } else if (!perf_missing_features.group_read &&
1827 evsel->core.attr.inherit &&
1828 (evsel->core.attr.read_format & PERF_FORMAT_GROUP) &&
1829 evsel__is_group_leader(evsel)) {
1830 perf_missing_features.group_read = true;
1831 pr_debug2_peo("switching off group read\n");
1832 goto fallback_missing_features;
1836 threads->err_thread = thread;
1840 while (--thread >= 0) {
1841 if (FD(evsel, cpu, thread) >= 0)
1842 close(FD(evsel, cpu, thread));
1843 FD(evsel, cpu, thread) = -1;
1846 } while (--cpu >= 0);
1851 int evsel__open(struct evsel *evsel, struct perf_cpu_map *cpus,
1852 struct perf_thread_map *threads)
1854 return evsel__open_cpu(evsel, cpus, threads, 0, cpus ? cpus->nr : 1);
1857 void evsel__close(struct evsel *evsel)
1859 perf_evsel__close(&evsel->core);
1860 perf_evsel__free_id(&evsel->core);
1863 int evsel__open_per_cpu(struct evsel *evsel, struct perf_cpu_map *cpus, int cpu)
1866 return evsel__open_cpu(evsel, cpus, NULL, 0,
1867 cpus ? cpus->nr : 1);
1869 return evsel__open_cpu(evsel, cpus, NULL, cpu, cpu + 1);
1872 int evsel__open_per_thread(struct evsel *evsel, struct perf_thread_map *threads)
1874 return evsel__open(evsel, NULL, threads);
1877 static int perf_evsel__parse_id_sample(const struct evsel *evsel,
1878 const union perf_event *event,
1879 struct perf_sample *sample)
1881 u64 type = evsel->core.attr.sample_type;
1882 const __u64 *array = event->sample.array;
1883 bool swapped = evsel->needs_swap;
1886 array += ((event->header.size -
1887 sizeof(event->header)) / sizeof(u64)) - 1;
1889 if (type & PERF_SAMPLE_IDENTIFIER) {
1890 sample->id = *array;
1894 if (type & PERF_SAMPLE_CPU) {
1897 /* undo swap of u64, then swap on individual u32s */
1898 u.val64 = bswap_64(u.val64);
1899 u.val32[0] = bswap_32(u.val32[0]);
1902 sample->cpu = u.val32[0];
1906 if (type & PERF_SAMPLE_STREAM_ID) {
1907 sample->stream_id = *array;
1911 if (type & PERF_SAMPLE_ID) {
1912 sample->id = *array;
1916 if (type & PERF_SAMPLE_TIME) {
1917 sample->time = *array;
1921 if (type & PERF_SAMPLE_TID) {
1924 /* undo swap of u64, then swap on individual u32s */
1925 u.val64 = bswap_64(u.val64);
1926 u.val32[0] = bswap_32(u.val32[0]);
1927 u.val32[1] = bswap_32(u.val32[1]);
1930 sample->pid = u.val32[0];
1931 sample->tid = u.val32[1];
1938 static inline bool overflow(const void *endp, u16 max_size, const void *offset,
1941 return size > max_size || offset + size > endp;
1944 #define OVERFLOW_CHECK(offset, size, max_size) \
1946 if (overflow(endp, (max_size), (offset), (size))) \
1950 #define OVERFLOW_CHECK_u64(offset) \
1951 OVERFLOW_CHECK(offset, sizeof(u64), sizeof(u64))
1954 perf_event__check_size(union perf_event *event, unsigned int sample_size)
1957 * The evsel's sample_size is based on PERF_SAMPLE_MASK which includes
1958 * up to PERF_SAMPLE_PERIOD. After that overflow() must be used to
1959 * check the format does not go past the end of the event.
1961 if (sample_size + sizeof(event->header) > event->header.size)
1967 int evsel__parse_sample(struct evsel *evsel, union perf_event *event,
1968 struct perf_sample *data)
1970 u64 type = evsel->core.attr.sample_type;
1971 bool swapped = evsel->needs_swap;
1973 u16 max_size = event->header.size;
1974 const void *endp = (void *)event + max_size;
1978 * used for cross-endian analysis. See git commit 65014ab3
1979 * for why this goofiness is needed.
1983 memset(data, 0, sizeof(*data));
1984 data->cpu = data->pid = data->tid = -1;
1985 data->stream_id = data->id = data->time = -1ULL;
1986 data->period = evsel->core.attr.sample_period;
1987 data->cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK;
1988 data->misc = event->header.misc;
1990 data->data_src = PERF_MEM_DATA_SRC_NONE;
1992 if (event->header.type != PERF_RECORD_SAMPLE) {
1993 if (!evsel->core.attr.sample_id_all)
1995 return perf_evsel__parse_id_sample(evsel, event, data);
1998 array = event->sample.array;
2000 if (perf_event__check_size(event, evsel->sample_size))
2003 if (type & PERF_SAMPLE_IDENTIFIER) {
2008 if (type & PERF_SAMPLE_IP) {
2013 if (type & PERF_SAMPLE_TID) {
2016 /* undo swap of u64, then swap on individual u32s */
2017 u.val64 = bswap_64(u.val64);
2018 u.val32[0] = bswap_32(u.val32[0]);
2019 u.val32[1] = bswap_32(u.val32[1]);
2022 data->pid = u.val32[0];
2023 data->tid = u.val32[1];
2027 if (type & PERF_SAMPLE_TIME) {
2028 data->time = *array;
2032 if (type & PERF_SAMPLE_ADDR) {
2033 data->addr = *array;
2037 if (type & PERF_SAMPLE_ID) {
2042 if (type & PERF_SAMPLE_STREAM_ID) {
2043 data->stream_id = *array;
2047 if (type & PERF_SAMPLE_CPU) {
2051 /* undo swap of u64, then swap on individual u32s */
2052 u.val64 = bswap_64(u.val64);
2053 u.val32[0] = bswap_32(u.val32[0]);
2056 data->cpu = u.val32[0];
2060 if (type & PERF_SAMPLE_PERIOD) {
2061 data->period = *array;
2065 if (type & PERF_SAMPLE_READ) {
2066 u64 read_format = evsel->core.attr.read_format;
2068 OVERFLOW_CHECK_u64(array);
2069 if (read_format & PERF_FORMAT_GROUP)
2070 data->read.group.nr = *array;
2072 data->read.one.value = *array;
2076 if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED) {
2077 OVERFLOW_CHECK_u64(array);
2078 data->read.time_enabled = *array;
2082 if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING) {
2083 OVERFLOW_CHECK_u64(array);
2084 data->read.time_running = *array;
2088 /* PERF_FORMAT_ID is forced for PERF_SAMPLE_READ */
2089 if (read_format & PERF_FORMAT_GROUP) {
2090 const u64 max_group_nr = UINT64_MAX /
2091 sizeof(struct sample_read_value);
2093 if (data->read.group.nr > max_group_nr)
2095 sz = data->read.group.nr *
2096 sizeof(struct sample_read_value);
2097 OVERFLOW_CHECK(array, sz, max_size);
2098 data->read.group.values =
2099 (struct sample_read_value *)array;
2100 array = (void *)array + sz;
2102 OVERFLOW_CHECK_u64(array);
2103 data->read.one.id = *array;
2108 if (type & PERF_SAMPLE_CALLCHAIN) {
2109 const u64 max_callchain_nr = UINT64_MAX / sizeof(u64);
2111 OVERFLOW_CHECK_u64(array);
2112 data->callchain = (struct ip_callchain *)array++;
2113 if (data->callchain->nr > max_callchain_nr)
2115 sz = data->callchain->nr * sizeof(u64);
2116 OVERFLOW_CHECK(array, sz, max_size);
2117 array = (void *)array + sz;
2120 if (type & PERF_SAMPLE_RAW) {
2121 OVERFLOW_CHECK_u64(array);
2125 * Undo swap of u64, then swap on individual u32s,
2126 * get the size of the raw area and undo all of the
2127 * swap. The pevent interface handles endianity by
2131 u.val64 = bswap_64(u.val64);
2132 u.val32[0] = bswap_32(u.val32[0]);
2133 u.val32[1] = bswap_32(u.val32[1]);
2135 data->raw_size = u.val32[0];
2138 * The raw data is aligned on 64bits including the
2139 * u32 size, so it's safe to use mem_bswap_64.
2142 mem_bswap_64((void *) array, data->raw_size);
2144 array = (void *)array + sizeof(u32);
2146 OVERFLOW_CHECK(array, data->raw_size, max_size);
2147 data->raw_data = (void *)array;
2148 array = (void *)array + data->raw_size;
2151 if (type & PERF_SAMPLE_BRANCH_STACK) {
2152 const u64 max_branch_nr = UINT64_MAX /
2153 sizeof(struct branch_entry);
2155 OVERFLOW_CHECK_u64(array);
2156 data->branch_stack = (struct branch_stack *)array++;
2158 if (data->branch_stack->nr > max_branch_nr)
2161 sz = data->branch_stack->nr * sizeof(struct branch_entry);
2162 if (evsel__has_branch_hw_idx(evsel))
2165 data->no_hw_idx = true;
2166 OVERFLOW_CHECK(array, sz, max_size);
2167 array = (void *)array + sz;
2170 if (type & PERF_SAMPLE_REGS_USER) {
2171 OVERFLOW_CHECK_u64(array);
2172 data->user_regs.abi = *array;
2175 if (data->user_regs.abi) {
2176 u64 mask = evsel->core.attr.sample_regs_user;
2178 sz = hweight64(mask) * sizeof(u64);
2179 OVERFLOW_CHECK(array, sz, max_size);
2180 data->user_regs.mask = mask;
2181 data->user_regs.regs = (u64 *)array;
2182 array = (void *)array + sz;
2186 if (type & PERF_SAMPLE_STACK_USER) {
2187 OVERFLOW_CHECK_u64(array);
2190 data->user_stack.offset = ((char *)(array - 1)
2194 data->user_stack.size = 0;
2196 OVERFLOW_CHECK(array, sz, max_size);
2197 data->user_stack.data = (char *)array;
2198 array = (void *)array + sz;
2199 OVERFLOW_CHECK_u64(array);
2200 data->user_stack.size = *array++;
2201 if (WARN_ONCE(data->user_stack.size > sz,
2202 "user stack dump failure\n"))
2207 if (type & PERF_SAMPLE_WEIGHT) {
2208 OVERFLOW_CHECK_u64(array);
2209 data->weight = *array;
2213 if (type & PERF_SAMPLE_DATA_SRC) {
2214 OVERFLOW_CHECK_u64(array);
2215 data->data_src = *array;
2219 if (type & PERF_SAMPLE_TRANSACTION) {
2220 OVERFLOW_CHECK_u64(array);
2221 data->transaction = *array;
2225 data->intr_regs.abi = PERF_SAMPLE_REGS_ABI_NONE;
2226 if (type & PERF_SAMPLE_REGS_INTR) {
2227 OVERFLOW_CHECK_u64(array);
2228 data->intr_regs.abi = *array;
2231 if (data->intr_regs.abi != PERF_SAMPLE_REGS_ABI_NONE) {
2232 u64 mask = evsel->core.attr.sample_regs_intr;
2234 sz = hweight64(mask) * sizeof(u64);
2235 OVERFLOW_CHECK(array, sz, max_size);
2236 data->intr_regs.mask = mask;
2237 data->intr_regs.regs = (u64 *)array;
2238 array = (void *)array + sz;
2242 data->phys_addr = 0;
2243 if (type & PERF_SAMPLE_PHYS_ADDR) {
2244 data->phys_addr = *array;
2249 if (type & PERF_SAMPLE_CGROUP) {
2250 data->cgroup = *array;
2254 if (type & PERF_SAMPLE_AUX) {
2255 OVERFLOW_CHECK_u64(array);
2258 OVERFLOW_CHECK(array, sz, max_size);
2259 /* Undo swap of data */
2261 mem_bswap_64((char *)array, sz);
2262 data->aux_sample.size = sz;
2263 data->aux_sample.data = (char *)array;
2264 array = (void *)array + sz;
2270 int evsel__parse_sample_timestamp(struct evsel *evsel, union perf_event *event,
2273 u64 type = evsel->core.attr.sample_type;
2276 if (!(type & PERF_SAMPLE_TIME))
2279 if (event->header.type != PERF_RECORD_SAMPLE) {
2280 struct perf_sample data = {
2284 if (!evsel->core.attr.sample_id_all)
2286 if (perf_evsel__parse_id_sample(evsel, event, &data))
2289 *timestamp = data.time;
2293 array = event->sample.array;
2295 if (perf_event__check_size(event, evsel->sample_size))
2298 if (type & PERF_SAMPLE_IDENTIFIER)
2301 if (type & PERF_SAMPLE_IP)
2304 if (type & PERF_SAMPLE_TID)
2307 if (type & PERF_SAMPLE_TIME)
2308 *timestamp = *array;
2313 struct tep_format_field *evsel__field(struct evsel *evsel, const char *name)
2315 return tep_find_field(evsel->tp_format, name);
2318 void *evsel__rawptr(struct evsel *evsel, struct perf_sample *sample, const char *name)
2320 struct tep_format_field *field = evsel__field(evsel, name);
2326 offset = field->offset;
2328 if (field->flags & TEP_FIELD_IS_DYNAMIC) {
2329 offset = *(int *)(sample->raw_data + field->offset);
2333 return sample->raw_data + offset;
2336 u64 format_field__intval(struct tep_format_field *field, struct perf_sample *sample,
2340 void *ptr = sample->raw_data + field->offset;
2342 switch (field->size) {
2346 value = *(u16 *)ptr;
2349 value = *(u32 *)ptr;
2352 memcpy(&value, ptr, sizeof(u64));
2361 switch (field->size) {
2363 return bswap_16(value);
2365 return bswap_32(value);
2367 return bswap_64(value);
2375 u64 evsel__intval(struct evsel *evsel, struct perf_sample *sample, const char *name)
2377 struct tep_format_field *field = evsel__field(evsel, name);
2382 return field ? format_field__intval(field, sample, evsel->needs_swap) : 0;
2385 bool evsel__fallback(struct evsel *evsel, int err, char *msg, size_t msgsize)
2389 if ((err == ENOENT || err == ENXIO || err == ENODEV) &&
2390 evsel->core.attr.type == PERF_TYPE_HARDWARE &&
2391 evsel->core.attr.config == PERF_COUNT_HW_CPU_CYCLES) {
2393 * If it's cycles then fall back to hrtimer based
2394 * cpu-clock-tick sw counter, which is always available even if
2397 * PPC returns ENXIO until 2.6.37 (behavior changed with commit
2400 scnprintf(msg, msgsize, "%s",
2401 "The cycles event is not supported, trying to fall back to cpu-clock-ticks");
2403 evsel->core.attr.type = PERF_TYPE_SOFTWARE;
2404 evsel->core.attr.config = PERF_COUNT_SW_CPU_CLOCK;
2406 zfree(&evsel->name);
2408 } else if (err == EACCES && !evsel->core.attr.exclude_kernel &&
2409 (paranoid = perf_event_paranoid()) > 1) {
2410 const char *name = evsel__name(evsel);
2412 const char *sep = ":";
2414 /* If event has exclude user then don't exclude kernel. */
2415 if (evsel->core.attr.exclude_user)
2418 /* Is there already the separator in the name. */
2419 if (strchr(name, '/') ||
2420 (strchr(name, ':') && !evsel->is_libpfm_event))
2423 if (asprintf(&new_name, "%s%su", name, sep) < 0)
2428 evsel->name = new_name;
2429 scnprintf(msg, msgsize, "kernel.perf_event_paranoid=%d, trying "
2430 "to fall back to excluding kernel and hypervisor "
2431 " samples", paranoid);
2432 evsel->core.attr.exclude_kernel = 1;
2433 evsel->core.attr.exclude_hv = 1;
2441 static bool find_process(const char *name)
2443 size_t len = strlen(name);
2448 dir = opendir(procfs__mountpoint());
2452 /* Walk through the directory. */
2453 while (ret && (d = readdir(dir)) != NULL) {
2454 char path[PATH_MAX];
2458 if ((d->d_type != DT_DIR) ||
2459 !strcmp(".", d->d_name) ||
2460 !strcmp("..", d->d_name))
2463 scnprintf(path, sizeof(path), "%s/%s/comm",
2464 procfs__mountpoint(), d->d_name);
2466 if (filename__read_str(path, &data, &size))
2469 ret = strncmp(name, data, len);
2474 return ret ? false : true;
2477 int evsel__open_strerror(struct evsel *evsel, struct target *target,
2478 int err, char *msg, size_t size)
2480 char sbuf[STRERR_BUFSIZE];
2481 int printed = 0, enforced = 0;
2486 printed += scnprintf(msg + printed, size - printed,
2487 "Access to performance monitoring and observability operations is limited.\n");
2489 if (!sysfs__read_int("fs/selinux/enforce", &enforced)) {
2491 printed += scnprintf(msg + printed, size - printed,
2492 "Enforced MAC policy settings (SELinux) can limit access to performance\n"
2493 "monitoring and observability operations. Inspect system audit records for\n"
2494 "more perf_event access control information and adjusting the policy.\n");
2499 printed += scnprintf(msg, size,
2500 "No permission to enable %s event.\n\n", evsel__name(evsel));
2502 return scnprintf(msg + printed, size - printed,
2503 "Consider adjusting /proc/sys/kernel/perf_event_paranoid setting to open\n"
2504 "access to performance monitoring and observability operations for users\n"
2505 "without CAP_PERFMON or CAP_SYS_ADMIN Linux capability.\n"
2506 "perf_event_paranoid setting is %d:\n"
2507 " -1: Allow use of (almost) all events by all users\n"
2508 " Ignore mlock limit after perf_event_mlock_kb without CAP_IPC_LOCK\n"
2509 ">= 0: Disallow raw and ftrace function tracepoint access\n"
2510 ">= 1: Disallow CPU event access\n"
2511 ">= 2: Disallow kernel profiling\n"
2512 "To make the adjusted perf_event_paranoid setting permanent preserve it\n"
2513 "in /etc/sysctl.conf (e.g. kernel.perf_event_paranoid = <setting>)",
2514 perf_event_paranoid());
2516 return scnprintf(msg, size, "The %s event is not supported.", evsel__name(evsel));
2518 return scnprintf(msg, size, "%s",
2519 "Too many events are opened.\n"
2520 "Probably the maximum number of open file descriptors has been reached.\n"
2521 "Hint: Try again after reducing the number of events.\n"
2522 "Hint: Try increasing the limit with 'ulimit -n <limit>'");
2524 if (evsel__has_callchain(evsel) &&
2525 access("/proc/sys/kernel/perf_event_max_stack", F_OK) == 0)
2526 return scnprintf(msg, size,
2527 "Not enough memory to setup event with callchain.\n"
2528 "Hint: Try tweaking /proc/sys/kernel/perf_event_max_stack\n"
2529 "Hint: Current value: %d", sysctl__max_stack());
2532 if (target->cpu_list)
2533 return scnprintf(msg, size, "%s",
2534 "No such device - did you specify an out-of-range profile CPU?");
2537 if (evsel->core.attr.sample_period != 0)
2538 return scnprintf(msg, size,
2539 "%s: PMU Hardware doesn't support sampling/overflow-interrupts. Try 'perf stat'",
2540 evsel__name(evsel));
2541 if (evsel->core.attr.precise_ip)
2542 return scnprintf(msg, size, "%s",
2543 "\'precise\' request may not be supported. Try removing 'p' modifier.");
2544 #if defined(__i386__) || defined(__x86_64__)
2545 if (evsel->core.attr.type == PERF_TYPE_HARDWARE)
2546 return scnprintf(msg, size, "%s",
2547 "No hardware sampling interrupt available.\n");
2551 if (find_process("oprofiled"))
2552 return scnprintf(msg, size,
2553 "The PMU counters are busy/taken by another profiler.\n"
2554 "We found oprofile daemon running, please stop it and try again.");
2557 if (evsel->core.attr.write_backward && perf_missing_features.write_backward)
2558 return scnprintf(msg, size, "Reading from overwrite event is not supported by this kernel.");
2559 if (perf_missing_features.clockid)
2560 return scnprintf(msg, size, "clockid feature not supported.");
2561 if (perf_missing_features.clockid_wrong)
2562 return scnprintf(msg, size, "wrong clockid (%d).", clockid);
2563 if (perf_missing_features.aux_output)
2564 return scnprintf(msg, size, "The 'aux_output' feature is not supported, update the kernel.");
2570 return scnprintf(msg, size,
2571 "The sys_perf_event_open() syscall returned with %d (%s) for event (%s).\n"
2572 "/bin/dmesg | grep -i perf may provide additional information.\n",
2573 err, str_error_r(err, sbuf, sizeof(sbuf)), evsel__name(evsel));
2576 struct perf_env *evsel__env(struct evsel *evsel)
2578 if (evsel && evsel->evlist)
2579 return evsel->evlist->env;
2583 static int store_evsel_ids(struct evsel *evsel, struct evlist *evlist)
2587 for (cpu = 0; cpu < xyarray__max_x(evsel->core.fd); cpu++) {
2588 for (thread = 0; thread < xyarray__max_y(evsel->core.fd);
2590 int fd = FD(evsel, cpu, thread);
2592 if (perf_evlist__id_add_fd(&evlist->core, &evsel->core,
2593 cpu, thread, fd) < 0)
2601 int evsel__store_ids(struct evsel *evsel, struct evlist *evlist)
2603 struct perf_cpu_map *cpus = evsel->core.cpus;
2604 struct perf_thread_map *threads = evsel->core.threads;
2606 if (perf_evsel__alloc_id(&evsel->core, cpus->nr, threads->nr))
2609 return store_evsel_ids(evsel, evlist);