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 "bpf_counter.h"
29 #include "callchain.h"
35 #include "util/evsel_config.h"
36 #include "util/evsel_fprintf.h"
38 #include <perf/cpumap.h>
39 #include "thread_map.h"
41 #include "perf_regs.h"
44 #include "trace-event.h"
50 #include "pmu-hybrid.h"
52 #include "../perf-sys.h"
53 #include "util/parse-branch-options.h"
54 #include <internal/xyarray.h>
55 #include <internal/lib.h>
57 #include <linux/ctype.h>
59 struct perf_missing_features perf_missing_features;
61 static clockid_t clockid;
63 static const char *const perf_tool_event__tool_names[PERF_TOOL_MAX] = {
70 const char *perf_tool_event__to_str(enum perf_tool_event ev)
72 if (ev > PERF_TOOL_NONE && ev < PERF_TOOL_MAX)
73 return perf_tool_event__tool_names[ev];
78 enum perf_tool_event perf_tool_event__from_str(const char *str)
82 perf_tool_event__for_each_event(i) {
83 if (!strcmp(str, perf_tool_event__tool_names[i]))
86 return PERF_TOOL_NONE;
90 static int evsel__no_extra_init(struct evsel *evsel __maybe_unused)
95 void __weak test_attr__ready(void) { }
97 static void evsel__no_extra_fini(struct evsel *evsel __maybe_unused)
103 int (*init)(struct evsel *evsel);
104 void (*fini)(struct evsel *evsel);
105 } perf_evsel__object = {
106 .size = sizeof(struct evsel),
107 .init = evsel__no_extra_init,
108 .fini = evsel__no_extra_fini,
111 int evsel__object_config(size_t object_size, int (*init)(struct evsel *evsel),
112 void (*fini)(struct evsel *evsel))
115 if (object_size == 0)
118 if (perf_evsel__object.size > object_size)
121 perf_evsel__object.size = object_size;
125 perf_evsel__object.init = init;
128 perf_evsel__object.fini = fini;
133 #define FD(e, x, y) (*(int *)xyarray__entry(e->core.fd, x, y))
135 int __evsel__sample_size(u64 sample_type)
137 u64 mask = sample_type & PERF_SAMPLE_MASK;
141 for (i = 0; i < 64; i++) {
142 if (mask & (1ULL << i))
152 * __perf_evsel__calc_id_pos - calculate id_pos.
153 * @sample_type: sample type
155 * This function returns the position of the event id (PERF_SAMPLE_ID or
156 * PERF_SAMPLE_IDENTIFIER) in a sample event i.e. in the array of struct
157 * perf_record_sample.
159 static int __perf_evsel__calc_id_pos(u64 sample_type)
163 if (sample_type & PERF_SAMPLE_IDENTIFIER)
166 if (!(sample_type & PERF_SAMPLE_ID))
169 if (sample_type & PERF_SAMPLE_IP)
172 if (sample_type & PERF_SAMPLE_TID)
175 if (sample_type & PERF_SAMPLE_TIME)
178 if (sample_type & PERF_SAMPLE_ADDR)
185 * __perf_evsel__calc_is_pos - calculate is_pos.
186 * @sample_type: sample type
188 * This function returns the position (counting backwards) of the event id
189 * (PERF_SAMPLE_ID or PERF_SAMPLE_IDENTIFIER) in a non-sample event i.e. if
190 * sample_id_all is used there is an id sample appended to non-sample events.
192 static int __perf_evsel__calc_is_pos(u64 sample_type)
196 if (sample_type & PERF_SAMPLE_IDENTIFIER)
199 if (!(sample_type & PERF_SAMPLE_ID))
202 if (sample_type & PERF_SAMPLE_CPU)
205 if (sample_type & PERF_SAMPLE_STREAM_ID)
211 void evsel__calc_id_pos(struct evsel *evsel)
213 evsel->id_pos = __perf_evsel__calc_id_pos(evsel->core.attr.sample_type);
214 evsel->is_pos = __perf_evsel__calc_is_pos(evsel->core.attr.sample_type);
217 void __evsel__set_sample_bit(struct evsel *evsel,
218 enum perf_event_sample_format bit)
220 if (!(evsel->core.attr.sample_type & bit)) {
221 evsel->core.attr.sample_type |= bit;
222 evsel->sample_size += sizeof(u64);
223 evsel__calc_id_pos(evsel);
227 void __evsel__reset_sample_bit(struct evsel *evsel,
228 enum perf_event_sample_format bit)
230 if (evsel->core.attr.sample_type & bit) {
231 evsel->core.attr.sample_type &= ~bit;
232 evsel->sample_size -= sizeof(u64);
233 evsel__calc_id_pos(evsel);
237 void evsel__set_sample_id(struct evsel *evsel,
238 bool can_sample_identifier)
240 if (can_sample_identifier) {
241 evsel__reset_sample_bit(evsel, ID);
242 evsel__set_sample_bit(evsel, IDENTIFIER);
244 evsel__set_sample_bit(evsel, ID);
246 evsel->core.attr.read_format |= PERF_FORMAT_ID;
250 * evsel__is_function_event - Return whether given evsel is a function
253 * @evsel - evsel selector to be tested
255 * Return %true if event is function trace event
257 bool evsel__is_function_event(struct evsel *evsel)
259 #define FUNCTION_EVENT "ftrace:function"
261 return evsel->name &&
262 !strncmp(FUNCTION_EVENT, evsel->name, sizeof(FUNCTION_EVENT));
264 #undef FUNCTION_EVENT
267 void evsel__init(struct evsel *evsel,
268 struct perf_event_attr *attr, int idx)
270 perf_evsel__init(&evsel->core, attr, idx);
271 evsel->tracking = !idx;
272 evsel->unit = strdup("");
274 evsel->max_events = ULONG_MAX;
275 evsel->evlist = NULL;
276 evsel->bpf_obj = NULL;
278 INIT_LIST_HEAD(&evsel->config_terms);
279 INIT_LIST_HEAD(&evsel->bpf_counter_list);
280 perf_evsel__object.init(evsel);
281 evsel->sample_size = __evsel__sample_size(attr->sample_type);
282 evsel__calc_id_pos(evsel);
283 evsel->cmdline_group_boundary = false;
284 evsel->metric_expr = NULL;
285 evsel->metric_name = NULL;
286 evsel->metric_events = NULL;
287 evsel->per_pkg_mask = NULL;
288 evsel->collect_stat = false;
289 evsel->pmu_name = NULL;
292 struct evsel *evsel__new_idx(struct perf_event_attr *attr, int idx)
294 struct evsel *evsel = zalloc(perf_evsel__object.size);
298 evsel__init(evsel, attr, idx);
300 if (evsel__is_bpf_output(evsel) && !attr->sample_type) {
301 evsel->core.attr.sample_type = (PERF_SAMPLE_RAW | PERF_SAMPLE_TIME |
302 PERF_SAMPLE_CPU | PERF_SAMPLE_PERIOD),
303 evsel->core.attr.sample_period = 1;
306 if (evsel__is_clock(evsel)) {
307 free((char *)evsel->unit);
308 evsel->unit = strdup("msec");
315 static bool perf_event_can_profile_kernel(void)
317 return perf_event_paranoid_check(1);
320 struct evsel *evsel__new_cycles(bool precise __maybe_unused, __u32 type, __u64 config)
322 struct perf_event_attr attr = {
325 .exclude_kernel = !perf_event_can_profile_kernel(),
329 event_attr_init(&attr);
332 * Now let the usual logic to set up the perf_event_attr defaults
333 * to kick in when we return and before perf_evsel__open() is called.
335 evsel = evsel__new(&attr);
339 arch_evsel__fixup_new_cycles(&evsel->core.attr);
341 evsel->precise_max = true;
343 /* use asprintf() because free(evsel) assumes name is allocated */
344 if (asprintf(&evsel->name, "cycles%s%s%.*s",
345 (attr.precise_ip || attr.exclude_kernel) ? ":" : "",
346 attr.exclude_kernel ? "u" : "",
347 attr.precise_ip ? attr.precise_ip + 1 : 0, "ppp") < 0)
352 evsel__delete(evsel);
357 int copy_config_terms(struct list_head *dst, struct list_head *src)
359 struct evsel_config_term *pos, *tmp;
361 list_for_each_entry(pos, src, list) {
362 tmp = malloc(sizeof(*tmp));
368 tmp->val.str = strdup(pos->val.str);
369 if (tmp->val.str == NULL) {
374 list_add_tail(&tmp->list, dst);
379 static int evsel__copy_config_terms(struct evsel *dst, struct evsel *src)
381 return copy_config_terms(&dst->config_terms, &src->config_terms);
385 * evsel__clone - create a new evsel copied from @orig
386 * @orig: original evsel
388 * The assumption is that @orig is not configured nor opened yet.
389 * So we only care about the attributes that can be set while it's parsed.
391 struct evsel *evsel__clone(struct evsel *orig)
395 BUG_ON(orig->core.fd);
396 BUG_ON(orig->counts);
398 BUG_ON(orig->per_pkg_mask);
400 /* cannot handle BPF objects for now */
404 evsel = evsel__new(&orig->core.attr);
408 evsel->core.cpus = perf_cpu_map__get(orig->core.cpus);
409 evsel->core.own_cpus = perf_cpu_map__get(orig->core.own_cpus);
410 evsel->core.threads = perf_thread_map__get(orig->core.threads);
411 evsel->core.nr_members = orig->core.nr_members;
412 evsel->core.system_wide = orig->core.system_wide;
413 evsel->core.requires_cpu = orig->core.requires_cpu;
416 evsel->name = strdup(orig->name);
417 if (evsel->name == NULL)
420 if (orig->group_name) {
421 evsel->group_name = strdup(orig->group_name);
422 if (evsel->group_name == NULL)
425 if (orig->pmu_name) {
426 evsel->pmu_name = strdup(orig->pmu_name);
427 if (evsel->pmu_name == NULL)
431 evsel->filter = strdup(orig->filter);
432 if (evsel->filter == NULL)
435 if (orig->metric_id) {
436 evsel->metric_id = strdup(orig->metric_id);
437 if (evsel->metric_id == NULL)
440 evsel->cgrp = cgroup__get(orig->cgrp);
441 evsel->tp_format = orig->tp_format;
442 evsel->handler = orig->handler;
443 evsel->core.leader = orig->core.leader;
445 evsel->max_events = orig->max_events;
446 evsel->tool_event = orig->tool_event;
447 free((char *)evsel->unit);
448 evsel->unit = strdup(orig->unit);
449 if (evsel->unit == NULL)
452 evsel->scale = orig->scale;
453 evsel->snapshot = orig->snapshot;
454 evsel->per_pkg = orig->per_pkg;
455 evsel->percore = orig->percore;
456 evsel->precise_max = orig->precise_max;
457 evsel->use_uncore_alias = orig->use_uncore_alias;
458 evsel->is_libpfm_event = orig->is_libpfm_event;
460 evsel->exclude_GH = orig->exclude_GH;
461 evsel->sample_read = orig->sample_read;
462 evsel->auto_merge_stats = orig->auto_merge_stats;
463 evsel->collect_stat = orig->collect_stat;
464 evsel->weak_group = orig->weak_group;
465 evsel->use_config_name = orig->use_config_name;
467 if (evsel__copy_config_terms(evsel, orig) < 0)
473 evsel__delete(evsel);
478 * Returns pointer with encoded error via <linux/err.h> interface.
480 struct evsel *evsel__newtp_idx(const char *sys, const char *name, int idx)
482 struct evsel *evsel = zalloc(perf_evsel__object.size);
488 struct perf_event_attr attr = {
489 .type = PERF_TYPE_TRACEPOINT,
490 .sample_type = (PERF_SAMPLE_RAW | PERF_SAMPLE_TIME |
491 PERF_SAMPLE_CPU | PERF_SAMPLE_PERIOD),
494 if (asprintf(&evsel->name, "%s:%s", sys, name) < 0)
497 evsel->tp_format = trace_event__tp_format(sys, name);
498 if (IS_ERR(evsel->tp_format)) {
499 err = PTR_ERR(evsel->tp_format);
503 event_attr_init(&attr);
504 attr.config = evsel->tp_format->id;
505 attr.sample_period = 1;
506 evsel__init(evsel, &attr, idx);
518 const char *const evsel__hw_names[PERF_COUNT_HW_MAX] = {
526 "stalled-cycles-frontend",
527 "stalled-cycles-backend",
531 char *evsel__bpf_counter_events;
533 bool evsel__match_bpf_counter_events(const char *name)
539 if (!evsel__bpf_counter_events)
542 ptr = strstr(evsel__bpf_counter_events, name);
543 name_len = strlen(name);
545 /* check name matches a full token in evsel__bpf_counter_events */
546 match = (ptr != NULL) &&
547 ((ptr == evsel__bpf_counter_events) || (*(ptr - 1) == ',')) &&
548 ((*(ptr + name_len) == ',') || (*(ptr + name_len) == '\0'));
553 static const char *__evsel__hw_name(u64 config)
555 if (config < PERF_COUNT_HW_MAX && evsel__hw_names[config])
556 return evsel__hw_names[config];
558 return "unknown-hardware";
561 static int evsel__add_modifiers(struct evsel *evsel, char *bf, size_t size)
563 int colon = 0, r = 0;
564 struct perf_event_attr *attr = &evsel->core.attr;
565 bool exclude_guest_default = false;
567 #define MOD_PRINT(context, mod) do { \
568 if (!attr->exclude_##context) { \
569 if (!colon) colon = ++r; \
570 r += scnprintf(bf + r, size - r, "%c", mod); \
573 if (attr->exclude_kernel || attr->exclude_user || attr->exclude_hv) {
574 MOD_PRINT(kernel, 'k');
575 MOD_PRINT(user, 'u');
577 exclude_guest_default = true;
580 if (attr->precise_ip) {
583 r += scnprintf(bf + r, size - r, "%.*s", attr->precise_ip, "ppp");
584 exclude_guest_default = true;
587 if (attr->exclude_host || attr->exclude_guest == exclude_guest_default) {
588 MOD_PRINT(host, 'H');
589 MOD_PRINT(guest, 'G');
597 int __weak arch_evsel__hw_name(struct evsel *evsel, char *bf, size_t size)
599 return scnprintf(bf, size, "%s", __evsel__hw_name(evsel->core.attr.config));
602 static int evsel__hw_name(struct evsel *evsel, char *bf, size_t size)
604 int r = arch_evsel__hw_name(evsel, bf, size);
605 return r + evsel__add_modifiers(evsel, bf + r, size - r);
608 const char *const evsel__sw_names[PERF_COUNT_SW_MAX] = {
621 static const char *__evsel__sw_name(u64 config)
623 if (config < PERF_COUNT_SW_MAX && evsel__sw_names[config])
624 return evsel__sw_names[config];
625 return "unknown-software";
628 static int evsel__sw_name(struct evsel *evsel, char *bf, size_t size)
630 int r = scnprintf(bf, size, "%s", __evsel__sw_name(evsel->core.attr.config));
631 return r + evsel__add_modifiers(evsel, bf + r, size - r);
634 static int evsel__tool_name(enum perf_tool_event ev, char *bf, size_t size)
636 return scnprintf(bf, size, "%s", perf_tool_event__to_str(ev));
639 static int __evsel__bp_name(char *bf, size_t size, u64 addr, u64 type)
643 r = scnprintf(bf, size, "mem:0x%" PRIx64 ":", addr);
645 if (type & HW_BREAKPOINT_R)
646 r += scnprintf(bf + r, size - r, "r");
648 if (type & HW_BREAKPOINT_W)
649 r += scnprintf(bf + r, size - r, "w");
651 if (type & HW_BREAKPOINT_X)
652 r += scnprintf(bf + r, size - r, "x");
657 static int evsel__bp_name(struct evsel *evsel, char *bf, size_t size)
659 struct perf_event_attr *attr = &evsel->core.attr;
660 int r = __evsel__bp_name(bf, size, attr->bp_addr, attr->bp_type);
661 return r + evsel__add_modifiers(evsel, bf + r, size - r);
664 const char *const evsel__hw_cache[PERF_COUNT_HW_CACHE_MAX][EVSEL__MAX_ALIASES] = {
665 { "L1-dcache", "l1-d", "l1d", "L1-data", },
666 { "L1-icache", "l1-i", "l1i", "L1-instruction", },
668 { "dTLB", "d-tlb", "Data-TLB", },
669 { "iTLB", "i-tlb", "Instruction-TLB", },
670 { "branch", "branches", "bpu", "btb", "bpc", },
674 const char *const evsel__hw_cache_op[PERF_COUNT_HW_CACHE_OP_MAX][EVSEL__MAX_ALIASES] = {
675 { "load", "loads", "read", },
676 { "store", "stores", "write", },
677 { "prefetch", "prefetches", "speculative-read", "speculative-load", },
680 const char *const evsel__hw_cache_result[PERF_COUNT_HW_CACHE_RESULT_MAX][EVSEL__MAX_ALIASES] = {
681 { "refs", "Reference", "ops", "access", },
682 { "misses", "miss", },
685 #define C(x) PERF_COUNT_HW_CACHE_##x
686 #define CACHE_READ (1 << C(OP_READ))
687 #define CACHE_WRITE (1 << C(OP_WRITE))
688 #define CACHE_PREFETCH (1 << C(OP_PREFETCH))
689 #define COP(x) (1 << x)
692 * cache operation stat
693 * L1I : Read and prefetch only
694 * ITLB and BPU : Read-only
696 static const unsigned long evsel__hw_cache_stat[C(MAX)] = {
697 [C(L1D)] = (CACHE_READ | CACHE_WRITE | CACHE_PREFETCH),
698 [C(L1I)] = (CACHE_READ | CACHE_PREFETCH),
699 [C(LL)] = (CACHE_READ | CACHE_WRITE | CACHE_PREFETCH),
700 [C(DTLB)] = (CACHE_READ | CACHE_WRITE | CACHE_PREFETCH),
701 [C(ITLB)] = (CACHE_READ),
702 [C(BPU)] = (CACHE_READ),
703 [C(NODE)] = (CACHE_READ | CACHE_WRITE | CACHE_PREFETCH),
706 bool evsel__is_cache_op_valid(u8 type, u8 op)
708 if (evsel__hw_cache_stat[type] & COP(op))
709 return true; /* valid */
711 return false; /* invalid */
714 int __evsel__hw_cache_type_op_res_name(u8 type, u8 op, u8 result, char *bf, size_t size)
717 return scnprintf(bf, size, "%s-%s-%s", evsel__hw_cache[type][0],
718 evsel__hw_cache_op[op][0],
719 evsel__hw_cache_result[result][0]);
722 return scnprintf(bf, size, "%s-%s", evsel__hw_cache[type][0],
723 evsel__hw_cache_op[op][1]);
726 static int __evsel__hw_cache_name(u64 config, char *bf, size_t size)
728 u8 op, result, type = (config >> 0) & 0xff;
729 const char *err = "unknown-ext-hardware-cache-type";
731 if (type >= PERF_COUNT_HW_CACHE_MAX)
734 op = (config >> 8) & 0xff;
735 err = "unknown-ext-hardware-cache-op";
736 if (op >= PERF_COUNT_HW_CACHE_OP_MAX)
739 result = (config >> 16) & 0xff;
740 err = "unknown-ext-hardware-cache-result";
741 if (result >= PERF_COUNT_HW_CACHE_RESULT_MAX)
744 err = "invalid-cache";
745 if (!evsel__is_cache_op_valid(type, op))
748 return __evsel__hw_cache_type_op_res_name(type, op, result, bf, size);
750 return scnprintf(bf, size, "%s", err);
753 static int evsel__hw_cache_name(struct evsel *evsel, char *bf, size_t size)
755 int ret = __evsel__hw_cache_name(evsel->core.attr.config, bf, size);
756 return ret + evsel__add_modifiers(evsel, bf + ret, size - ret);
759 static int evsel__raw_name(struct evsel *evsel, char *bf, size_t size)
761 int ret = scnprintf(bf, size, "raw 0x%" PRIx64, evsel->core.attr.config);
762 return ret + evsel__add_modifiers(evsel, bf + ret, size - ret);
765 const char *evsel__name(struct evsel *evsel)
775 switch (evsel->core.attr.type) {
777 evsel__raw_name(evsel, bf, sizeof(bf));
780 case PERF_TYPE_HARDWARE:
781 evsel__hw_name(evsel, bf, sizeof(bf));
784 case PERF_TYPE_HW_CACHE:
785 evsel__hw_cache_name(evsel, bf, sizeof(bf));
788 case PERF_TYPE_SOFTWARE:
789 if (evsel__is_tool(evsel))
790 evsel__tool_name(evsel->tool_event, bf, sizeof(bf));
792 evsel__sw_name(evsel, bf, sizeof(bf));
795 case PERF_TYPE_TRACEPOINT:
796 scnprintf(bf, sizeof(bf), "%s", "unknown tracepoint");
799 case PERF_TYPE_BREAKPOINT:
800 evsel__bp_name(evsel, bf, sizeof(bf));
804 scnprintf(bf, sizeof(bf), "unknown attr type: %d",
805 evsel->core.attr.type);
809 evsel->name = strdup(bf);
817 const char *evsel__metric_id(const struct evsel *evsel)
819 if (evsel->metric_id)
820 return evsel->metric_id;
822 if (evsel__is_tool(evsel))
823 return perf_tool_event__to_str(evsel->tool_event);
828 const char *evsel__group_name(struct evsel *evsel)
830 return evsel->group_name ?: "anon group";
834 * Returns the group details for the specified leader,
835 * with following rules.
837 * For record -e '{cycles,instructions}'
838 * 'anon group { cycles:u, instructions:u }'
840 * For record -e 'cycles,instructions' and report --group
841 * 'cycles:u, instructions:u'
843 int evsel__group_desc(struct evsel *evsel, char *buf, size_t size)
847 const char *group_name = evsel__group_name(evsel);
849 if (!evsel->forced_leader)
850 ret = scnprintf(buf, size, "%s { ", group_name);
852 ret += scnprintf(buf + ret, size - ret, "%s", evsel__name(evsel));
854 for_each_group_member(pos, evsel)
855 ret += scnprintf(buf + ret, size - ret, ", %s", evsel__name(pos));
857 if (!evsel->forced_leader)
858 ret += scnprintf(buf + ret, size - ret, " }");
863 static void __evsel__config_callchain(struct evsel *evsel, struct record_opts *opts,
864 struct callchain_param *param)
866 bool function = evsel__is_function_event(evsel);
867 struct perf_event_attr *attr = &evsel->core.attr;
869 evsel__set_sample_bit(evsel, CALLCHAIN);
871 attr->sample_max_stack = param->max_stack;
873 if (opts->kernel_callchains)
874 attr->exclude_callchain_user = 1;
875 if (opts->user_callchains)
876 attr->exclude_callchain_kernel = 1;
877 if (param->record_mode == CALLCHAIN_LBR) {
878 if (!opts->branch_stack) {
879 if (attr->exclude_user) {
880 pr_warning("LBR callstack option is only available "
881 "to get user callchain information. "
882 "Falling back to framepointers.\n");
884 evsel__set_sample_bit(evsel, BRANCH_STACK);
885 attr->branch_sample_type = PERF_SAMPLE_BRANCH_USER |
886 PERF_SAMPLE_BRANCH_CALL_STACK |
887 PERF_SAMPLE_BRANCH_NO_CYCLES |
888 PERF_SAMPLE_BRANCH_NO_FLAGS |
889 PERF_SAMPLE_BRANCH_HW_INDEX;
892 pr_warning("Cannot use LBR callstack with branch stack. "
893 "Falling back to framepointers.\n");
896 if (param->record_mode == CALLCHAIN_DWARF) {
898 evsel__set_sample_bit(evsel, REGS_USER);
899 evsel__set_sample_bit(evsel, STACK_USER);
900 if (opts->sample_user_regs && DWARF_MINIMAL_REGS != PERF_REGS_MASK) {
901 attr->sample_regs_user |= DWARF_MINIMAL_REGS;
902 pr_warning("WARNING: The use of --call-graph=dwarf may require all the user registers, "
903 "specifying a subset with --user-regs may render DWARF unwinding unreliable, "
904 "so the minimal registers set (IP, SP) is explicitly forced.\n");
906 attr->sample_regs_user |= arch__user_reg_mask();
908 attr->sample_stack_user = param->dump_size;
909 attr->exclude_callchain_user = 1;
911 pr_info("Cannot use DWARF unwind for function trace event,"
912 " falling back to framepointers.\n");
917 pr_info("Disabling user space callchains for function trace event.\n");
918 attr->exclude_callchain_user = 1;
922 void evsel__config_callchain(struct evsel *evsel, struct record_opts *opts,
923 struct callchain_param *param)
926 return __evsel__config_callchain(evsel, opts, param);
929 static void evsel__reset_callgraph(struct evsel *evsel, struct callchain_param *param)
931 struct perf_event_attr *attr = &evsel->core.attr;
933 evsel__reset_sample_bit(evsel, CALLCHAIN);
934 if (param->record_mode == CALLCHAIN_LBR) {
935 evsel__reset_sample_bit(evsel, BRANCH_STACK);
936 attr->branch_sample_type &= ~(PERF_SAMPLE_BRANCH_USER |
937 PERF_SAMPLE_BRANCH_CALL_STACK |
938 PERF_SAMPLE_BRANCH_HW_INDEX);
940 if (param->record_mode == CALLCHAIN_DWARF) {
941 evsel__reset_sample_bit(evsel, REGS_USER);
942 evsel__reset_sample_bit(evsel, STACK_USER);
946 static void evsel__apply_config_terms(struct evsel *evsel,
947 struct record_opts *opts, bool track)
949 struct evsel_config_term *term;
950 struct list_head *config_terms = &evsel->config_terms;
951 struct perf_event_attr *attr = &evsel->core.attr;
952 /* callgraph default */
953 struct callchain_param param = {
954 .record_mode = callchain_param.record_mode,
958 const char *callgraph_buf = NULL;
960 list_for_each_entry(term, config_terms, list) {
961 switch (term->type) {
962 case EVSEL__CONFIG_TERM_PERIOD:
963 if (!(term->weak && opts->user_interval != ULLONG_MAX)) {
964 attr->sample_period = term->val.period;
966 evsel__reset_sample_bit(evsel, PERIOD);
969 case EVSEL__CONFIG_TERM_FREQ:
970 if (!(term->weak && opts->user_freq != UINT_MAX)) {
971 attr->sample_freq = term->val.freq;
973 evsel__set_sample_bit(evsel, PERIOD);
976 case EVSEL__CONFIG_TERM_TIME:
978 evsel__set_sample_bit(evsel, TIME);
980 evsel__reset_sample_bit(evsel, TIME);
982 case EVSEL__CONFIG_TERM_CALLGRAPH:
983 callgraph_buf = term->val.str;
985 case EVSEL__CONFIG_TERM_BRANCH:
986 if (term->val.str && strcmp(term->val.str, "no")) {
987 evsel__set_sample_bit(evsel, BRANCH_STACK);
988 parse_branch_str(term->val.str,
989 &attr->branch_sample_type);
991 evsel__reset_sample_bit(evsel, BRANCH_STACK);
993 case EVSEL__CONFIG_TERM_STACK_USER:
994 dump_size = term->val.stack_user;
996 case EVSEL__CONFIG_TERM_MAX_STACK:
997 max_stack = term->val.max_stack;
999 case EVSEL__CONFIG_TERM_MAX_EVENTS:
1000 evsel->max_events = term->val.max_events;
1002 case EVSEL__CONFIG_TERM_INHERIT:
1004 * attr->inherit should has already been set by
1005 * evsel__config. If user explicitly set
1006 * inherit using config terms, override global
1007 * opt->no_inherit setting.
1009 attr->inherit = term->val.inherit ? 1 : 0;
1011 case EVSEL__CONFIG_TERM_OVERWRITE:
1012 attr->write_backward = term->val.overwrite ? 1 : 0;
1014 case EVSEL__CONFIG_TERM_DRV_CFG:
1016 case EVSEL__CONFIG_TERM_PERCORE:
1018 case EVSEL__CONFIG_TERM_AUX_OUTPUT:
1019 attr->aux_output = term->val.aux_output ? 1 : 0;
1021 case EVSEL__CONFIG_TERM_AUX_SAMPLE_SIZE:
1022 /* Already applied by auxtrace */
1024 case EVSEL__CONFIG_TERM_CFG_CHG:
1031 /* User explicitly set per-event callgraph, clear the old setting and reset. */
1032 if ((callgraph_buf != NULL) || (dump_size > 0) || max_stack) {
1033 bool sample_address = false;
1036 param.max_stack = max_stack;
1037 if (callgraph_buf == NULL)
1038 callgraph_buf = "fp";
1041 /* parse callgraph parameters */
1042 if (callgraph_buf != NULL) {
1043 if (!strcmp(callgraph_buf, "no")) {
1044 param.enabled = false;
1045 param.record_mode = CALLCHAIN_NONE;
1047 param.enabled = true;
1048 if (parse_callchain_record(callgraph_buf, ¶m)) {
1049 pr_err("per-event callgraph setting for %s failed. "
1050 "Apply callgraph global setting for it\n",
1054 if (param.record_mode == CALLCHAIN_DWARF)
1055 sample_address = true;
1058 if (dump_size > 0) {
1059 dump_size = round_up(dump_size, sizeof(u64));
1060 param.dump_size = dump_size;
1063 /* If global callgraph set, clear it */
1064 if (callchain_param.enabled)
1065 evsel__reset_callgraph(evsel, &callchain_param);
1067 /* set perf-event callgraph */
1068 if (param.enabled) {
1069 if (sample_address) {
1070 evsel__set_sample_bit(evsel, ADDR);
1071 evsel__set_sample_bit(evsel, DATA_SRC);
1072 evsel->core.attr.mmap_data = track;
1074 evsel__config_callchain(evsel, opts, ¶m);
1079 struct evsel_config_term *__evsel__get_config_term(struct evsel *evsel, enum evsel_term_type type)
1081 struct evsel_config_term *term, *found_term = NULL;
1083 list_for_each_entry(term, &evsel->config_terms, list) {
1084 if (term->type == type)
1091 void __weak arch_evsel__set_sample_weight(struct evsel *evsel)
1093 evsel__set_sample_bit(evsel, WEIGHT);
1096 void __weak arch_evsel__fixup_new_cycles(struct perf_event_attr *attr __maybe_unused)
1100 void __weak arch__post_evsel_config(struct evsel *evsel __maybe_unused,
1101 struct perf_event_attr *attr __maybe_unused)
1105 static void evsel__set_default_freq_period(struct record_opts *opts,
1106 struct perf_event_attr *attr)
1110 attr->sample_freq = opts->freq;
1112 attr->sample_period = opts->default_interval;
1116 static bool evsel__is_offcpu_event(struct evsel *evsel)
1118 return evsel__is_bpf_output(evsel) && !strcmp(evsel->name, OFFCPU_EVENT);
1122 * The enable_on_exec/disabled value strategy:
1124 * 1) For any type of traced program:
1125 * - all independent events and group leaders are disabled
1126 * - all group members are enabled
1128 * Group members are ruled by group leaders. They need to
1129 * be enabled, because the group scheduling relies on that.
1131 * 2) For traced programs executed by perf:
1132 * - all independent events and group leaders have
1133 * enable_on_exec set
1134 * - we don't specifically enable or disable any event during
1135 * the record command
1137 * Independent events and group leaders are initially disabled
1138 * and get enabled by exec. Group members are ruled by group
1139 * leaders as stated in 1).
1141 * 3) For traced programs attached by perf (pid/tid):
1142 * - we specifically enable or disable all events during
1143 * the record command
1145 * When attaching events to already running traced we
1146 * enable/disable events specifically, as there's no
1147 * initial traced exec call.
1149 void evsel__config(struct evsel *evsel, struct record_opts *opts,
1150 struct callchain_param *callchain)
1152 struct evsel *leader = evsel__leader(evsel);
1153 struct perf_event_attr *attr = &evsel->core.attr;
1154 int track = evsel->tracking;
1155 bool per_cpu = opts->target.default_per_cpu && !opts->target.per_thread;
1157 attr->sample_id_all = perf_missing_features.sample_id_all ? 0 : 1;
1158 attr->inherit = !opts->no_inherit;
1159 attr->write_backward = opts->overwrite ? 1 : 0;
1161 evsel__set_sample_bit(evsel, IP);
1162 evsel__set_sample_bit(evsel, TID);
1164 if (evsel->sample_read) {
1165 evsel__set_sample_bit(evsel, READ);
1168 * We need ID even in case of single event, because
1169 * PERF_SAMPLE_READ process ID specific data.
1171 evsel__set_sample_id(evsel, false);
1174 * Apply group format only if we belong to group
1175 * with more than one members.
1177 if (leader->core.nr_members > 1) {
1178 attr->read_format |= PERF_FORMAT_GROUP;
1184 * We default some events to have a default interval. But keep
1185 * it a weak assumption overridable by the user.
1187 if ((evsel->is_libpfm_event && !attr->sample_period) ||
1188 (!evsel->is_libpfm_event && (!attr->sample_period ||
1189 opts->user_freq != UINT_MAX ||
1190 opts->user_interval != ULLONG_MAX)))
1191 evsel__set_default_freq_period(opts, attr);
1194 * If attr->freq was set (here or earlier), ask for period
1198 evsel__set_sample_bit(evsel, PERIOD);
1200 if (opts->no_samples)
1201 attr->sample_freq = 0;
1203 if (opts->inherit_stat) {
1204 evsel->core.attr.read_format |=
1205 PERF_FORMAT_TOTAL_TIME_ENABLED |
1206 PERF_FORMAT_TOTAL_TIME_RUNNING |
1208 attr->inherit_stat = 1;
1211 if (opts->sample_address) {
1212 evsel__set_sample_bit(evsel, ADDR);
1213 attr->mmap_data = track;
1217 * We don't allow user space callchains for function trace
1218 * event, due to issues with page faults while tracing page
1219 * fault handler and its overall trickiness nature.
1221 if (evsel__is_function_event(evsel))
1222 evsel->core.attr.exclude_callchain_user = 1;
1224 if (callchain && callchain->enabled && !evsel->no_aux_samples)
1225 evsel__config_callchain(evsel, opts, callchain);
1227 if (opts->sample_intr_regs && !evsel->no_aux_samples &&
1228 !evsel__is_dummy_event(evsel)) {
1229 attr->sample_regs_intr = opts->sample_intr_regs;
1230 evsel__set_sample_bit(evsel, REGS_INTR);
1233 if (opts->sample_user_regs && !evsel->no_aux_samples &&
1234 !evsel__is_dummy_event(evsel)) {
1235 attr->sample_regs_user |= opts->sample_user_regs;
1236 evsel__set_sample_bit(evsel, REGS_USER);
1239 if (target__has_cpu(&opts->target) || opts->sample_cpu)
1240 evsel__set_sample_bit(evsel, CPU);
1243 * When the user explicitly disabled time don't force it here.
1245 if (opts->sample_time &&
1246 (!perf_missing_features.sample_id_all &&
1247 (!opts->no_inherit || target__has_cpu(&opts->target) || per_cpu ||
1248 opts->sample_time_set)))
1249 evsel__set_sample_bit(evsel, TIME);
1251 if (opts->raw_samples && !evsel->no_aux_samples) {
1252 evsel__set_sample_bit(evsel, TIME);
1253 evsel__set_sample_bit(evsel, RAW);
1254 evsel__set_sample_bit(evsel, CPU);
1257 if (opts->sample_address)
1258 evsel__set_sample_bit(evsel, DATA_SRC);
1260 if (opts->sample_phys_addr)
1261 evsel__set_sample_bit(evsel, PHYS_ADDR);
1263 if (opts->no_buffering) {
1264 attr->watermark = 0;
1265 attr->wakeup_events = 1;
1267 if (opts->branch_stack && !evsel->no_aux_samples) {
1268 evsel__set_sample_bit(evsel, BRANCH_STACK);
1269 attr->branch_sample_type = opts->branch_stack;
1272 if (opts->sample_weight)
1273 arch_evsel__set_sample_weight(evsel);
1277 attr->mmap2 = track && !perf_missing_features.mmap2;
1279 attr->build_id = track && opts->build_id;
1282 * ksymbol is tracked separately with text poke because it needs to be
1283 * system wide and enabled immediately.
1285 if (!opts->text_poke)
1286 attr->ksymbol = track && !perf_missing_features.ksymbol;
1287 attr->bpf_event = track && !opts->no_bpf_event && !perf_missing_features.bpf;
1289 if (opts->record_namespaces)
1290 attr->namespaces = track;
1292 if (opts->record_cgroup) {
1293 attr->cgroup = track && !perf_missing_features.cgroup;
1294 evsel__set_sample_bit(evsel, CGROUP);
1297 if (opts->sample_data_page_size)
1298 evsel__set_sample_bit(evsel, DATA_PAGE_SIZE);
1300 if (opts->sample_code_page_size)
1301 evsel__set_sample_bit(evsel, CODE_PAGE_SIZE);
1303 if (opts->record_switch_events)
1304 attr->context_switch = track;
1306 if (opts->sample_transaction)
1307 evsel__set_sample_bit(evsel, TRANSACTION);
1309 if (opts->running_time) {
1310 evsel->core.attr.read_format |=
1311 PERF_FORMAT_TOTAL_TIME_ENABLED |
1312 PERF_FORMAT_TOTAL_TIME_RUNNING;
1316 * XXX see the function comment above
1318 * Disabling only independent events or group leaders,
1319 * keeping group members enabled.
1321 if (evsel__is_group_leader(evsel))
1325 * Setting enable_on_exec for independent events and
1326 * group leaders for traced executed by perf.
1328 if (target__none(&opts->target) && evsel__is_group_leader(evsel) &&
1329 !opts->initial_delay)
1330 attr->enable_on_exec = 1;
1332 if (evsel->immediate) {
1334 attr->enable_on_exec = 0;
1337 clockid = opts->clockid;
1338 if (opts->use_clockid) {
1339 attr->use_clockid = 1;
1340 attr->clockid = opts->clockid;
1343 if (evsel->precise_max)
1344 attr->precise_ip = 3;
1346 if (opts->all_user) {
1347 attr->exclude_kernel = 1;
1348 attr->exclude_user = 0;
1351 if (opts->all_kernel) {
1352 attr->exclude_kernel = 0;
1353 attr->exclude_user = 1;
1356 if (evsel->core.own_cpus || evsel->unit)
1357 evsel->core.attr.read_format |= PERF_FORMAT_ID;
1360 * Apply event specific term settings,
1361 * it overloads any global configuration.
1363 evsel__apply_config_terms(evsel, opts, track);
1365 evsel->ignore_missing_thread = opts->ignore_missing_thread;
1367 /* The --period option takes the precedence. */
1368 if (opts->period_set) {
1370 evsel__set_sample_bit(evsel, PERIOD);
1372 evsel__reset_sample_bit(evsel, PERIOD);
1376 * A dummy event never triggers any actual counter and therefore
1377 * cannot be used with branch_stack.
1379 * For initial_delay, a dummy event is added implicitly.
1380 * The software event will trigger -EOPNOTSUPP error out,
1381 * if BRANCH_STACK bit is set.
1383 if (evsel__is_dummy_event(evsel))
1384 evsel__reset_sample_bit(evsel, BRANCH_STACK);
1386 if (evsel__is_offcpu_event(evsel))
1387 evsel->core.attr.sample_type &= OFFCPU_SAMPLE_TYPES;
1389 arch__post_evsel_config(evsel, attr);
1392 int evsel__set_filter(struct evsel *evsel, const char *filter)
1394 char *new_filter = strdup(filter);
1396 if (new_filter != NULL) {
1397 free(evsel->filter);
1398 evsel->filter = new_filter;
1405 static int evsel__append_filter(struct evsel *evsel, const char *fmt, const char *filter)
1409 if (evsel->filter == NULL)
1410 return evsel__set_filter(evsel, filter);
1412 if (asprintf(&new_filter, fmt, evsel->filter, filter) > 0) {
1413 free(evsel->filter);
1414 evsel->filter = new_filter;
1421 int evsel__append_tp_filter(struct evsel *evsel, const char *filter)
1423 return evsel__append_filter(evsel, "(%s) && (%s)", filter);
1426 int evsel__append_addr_filter(struct evsel *evsel, const char *filter)
1428 return evsel__append_filter(evsel, "%s,%s", filter);
1431 /* Caller has to clear disabled after going through all CPUs. */
1432 int evsel__enable_cpu(struct evsel *evsel, int cpu_map_idx)
1434 return perf_evsel__enable_cpu(&evsel->core, cpu_map_idx);
1437 int evsel__enable(struct evsel *evsel)
1439 int err = perf_evsel__enable(&evsel->core);
1442 evsel->disabled = false;
1446 /* Caller has to set disabled after going through all CPUs. */
1447 int evsel__disable_cpu(struct evsel *evsel, int cpu_map_idx)
1449 return perf_evsel__disable_cpu(&evsel->core, cpu_map_idx);
1452 int evsel__disable(struct evsel *evsel)
1454 int err = perf_evsel__disable(&evsel->core);
1456 * We mark it disabled here so that tools that disable a event can
1457 * ignore events after they disable it. I.e. the ring buffer may have
1458 * already a few more events queued up before the kernel got the stop
1462 evsel->disabled = true;
1467 void free_config_terms(struct list_head *config_terms)
1469 struct evsel_config_term *term, *h;
1471 list_for_each_entry_safe(term, h, config_terms, list) {
1472 list_del_init(&term->list);
1474 zfree(&term->val.str);
1479 static void evsel__free_config_terms(struct evsel *evsel)
1481 free_config_terms(&evsel->config_terms);
1484 void evsel__exit(struct evsel *evsel)
1486 assert(list_empty(&evsel->core.node));
1487 assert(evsel->evlist == NULL);
1488 bpf_counter__destroy(evsel);
1489 evsel__free_counts(evsel);
1490 perf_evsel__free_fd(&evsel->core);
1491 perf_evsel__free_id(&evsel->core);
1492 evsel__free_config_terms(evsel);
1493 cgroup__put(evsel->cgrp);
1494 perf_cpu_map__put(evsel->core.cpus);
1495 perf_cpu_map__put(evsel->core.own_cpus);
1496 perf_thread_map__put(evsel->core.threads);
1497 zfree(&evsel->group_name);
1498 zfree(&evsel->name);
1499 zfree(&evsel->pmu_name);
1500 zfree(&evsel->unit);
1501 zfree(&evsel->metric_id);
1502 evsel__zero_per_pkg(evsel);
1503 hashmap__free(evsel->per_pkg_mask);
1504 evsel->per_pkg_mask = NULL;
1505 zfree(&evsel->metric_events);
1506 perf_evsel__object.fini(evsel);
1509 void evsel__delete(struct evsel *evsel)
1515 void evsel__compute_deltas(struct evsel *evsel, int cpu_map_idx, int thread,
1516 struct perf_counts_values *count)
1518 struct perf_counts_values tmp;
1520 if (!evsel->prev_raw_counts)
1523 if (cpu_map_idx == -1) {
1524 tmp = evsel->prev_raw_counts->aggr;
1525 evsel->prev_raw_counts->aggr = *count;
1527 tmp = *perf_counts(evsel->prev_raw_counts, cpu_map_idx, thread);
1528 *perf_counts(evsel->prev_raw_counts, cpu_map_idx, thread) = *count;
1531 count->val = count->val - tmp.val;
1532 count->ena = count->ena - tmp.ena;
1533 count->run = count->run - tmp.run;
1536 static int evsel__read_one(struct evsel *evsel, int cpu_map_idx, int thread)
1538 struct perf_counts_values *count = perf_counts(evsel->counts, cpu_map_idx, thread);
1540 return perf_evsel__read(&evsel->core, cpu_map_idx, thread, count);
1543 static void evsel__set_count(struct evsel *counter, int cpu_map_idx, int thread,
1544 u64 val, u64 ena, u64 run, u64 lost)
1546 struct perf_counts_values *count;
1548 count = perf_counts(counter->counts, cpu_map_idx, thread);
1555 perf_counts__set_loaded(counter->counts, cpu_map_idx, thread, true);
1558 static int evsel__process_group_data(struct evsel *leader, int cpu_map_idx, int thread, u64 *data)
1560 u64 read_format = leader->core.attr.read_format;
1561 struct sample_read_value *v;
1562 u64 nr, ena = 0, run = 0, lost = 0;
1566 if (nr != (u64) leader->core.nr_members)
1569 if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED)
1572 if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING)
1576 sample_read_group__for_each(v, nr, read_format) {
1577 struct evsel *counter;
1579 counter = evlist__id2evsel(leader->evlist, v->id);
1583 if (read_format & PERF_FORMAT_LOST)
1586 evsel__set_count(counter, cpu_map_idx, thread, v->value, ena, run, lost);
1592 static int evsel__read_group(struct evsel *leader, int cpu_map_idx, int thread)
1594 struct perf_stat_evsel *ps = leader->stats;
1595 u64 read_format = leader->core.attr.read_format;
1596 int size = perf_evsel__read_size(&leader->core);
1597 u64 *data = ps->group_data;
1599 if (!(read_format & PERF_FORMAT_ID))
1602 if (!evsel__is_group_leader(leader))
1606 data = zalloc(size);
1610 ps->group_data = data;
1613 if (FD(leader, cpu_map_idx, thread) < 0)
1616 if (readn(FD(leader, cpu_map_idx, thread), data, size) <= 0)
1619 return evsel__process_group_data(leader, cpu_map_idx, thread, data);
1622 int evsel__read_counter(struct evsel *evsel, int cpu_map_idx, int thread)
1624 u64 read_format = evsel->core.attr.read_format;
1626 if (read_format & PERF_FORMAT_GROUP)
1627 return evsel__read_group(evsel, cpu_map_idx, thread);
1629 return evsel__read_one(evsel, cpu_map_idx, thread);
1632 int __evsel__read_on_cpu(struct evsel *evsel, int cpu_map_idx, int thread, bool scale)
1634 struct perf_counts_values count;
1635 size_t nv = scale ? 3 : 1;
1637 if (FD(evsel, cpu_map_idx, thread) < 0)
1640 if (evsel->counts == NULL && evsel__alloc_counts(evsel) < 0)
1643 if (readn(FD(evsel, cpu_map_idx, thread), &count, nv * sizeof(u64)) <= 0)
1646 evsel__compute_deltas(evsel, cpu_map_idx, thread, &count);
1647 perf_counts_values__scale(&count, scale, NULL);
1648 *perf_counts(evsel->counts, cpu_map_idx, thread) = count;
1652 static int evsel__match_other_cpu(struct evsel *evsel, struct evsel *other,
1655 struct perf_cpu cpu;
1657 cpu = perf_cpu_map__cpu(evsel->core.cpus, cpu_map_idx);
1658 return perf_cpu_map__idx(other->core.cpus, cpu);
1661 static int evsel__hybrid_group_cpu_map_idx(struct evsel *evsel, int cpu_map_idx)
1663 struct evsel *leader = evsel__leader(evsel);
1665 if ((evsel__is_hybrid(evsel) && !evsel__is_hybrid(leader)) ||
1666 (!evsel__is_hybrid(evsel) && evsel__is_hybrid(leader))) {
1667 return evsel__match_other_cpu(evsel, leader, cpu_map_idx);
1673 static int get_group_fd(struct evsel *evsel, int cpu_map_idx, int thread)
1675 struct evsel *leader = evsel__leader(evsel);
1678 if (evsel__is_group_leader(evsel))
1682 * Leader must be already processed/open,
1683 * if not it's a bug.
1685 BUG_ON(!leader->core.fd);
1687 cpu_map_idx = evsel__hybrid_group_cpu_map_idx(evsel, cpu_map_idx);
1688 if (cpu_map_idx == -1)
1691 fd = FD(leader, cpu_map_idx, thread);
1697 static void evsel__remove_fd(struct evsel *pos, int nr_cpus, int nr_threads, int thread_idx)
1699 for (int cpu = 0; cpu < nr_cpus; cpu++)
1700 for (int thread = thread_idx; thread < nr_threads - 1; thread++)
1701 FD(pos, cpu, thread) = FD(pos, cpu, thread + 1);
1704 static int update_fds(struct evsel *evsel,
1705 int nr_cpus, int cpu_map_idx,
1706 int nr_threads, int thread_idx)
1710 if (cpu_map_idx >= nr_cpus || thread_idx >= nr_threads)
1713 evlist__for_each_entry(evsel->evlist, pos) {
1714 nr_cpus = pos != evsel ? nr_cpus : cpu_map_idx;
1716 evsel__remove_fd(pos, nr_cpus, nr_threads, thread_idx);
1719 * Since fds for next evsel has not been created,
1720 * there is no need to iterate whole event list.
1728 static bool evsel__ignore_missing_thread(struct evsel *evsel,
1729 int nr_cpus, int cpu_map_idx,
1730 struct perf_thread_map *threads,
1731 int thread, int err)
1733 pid_t ignore_pid = perf_thread_map__pid(threads, thread);
1735 if (!evsel->ignore_missing_thread)
1738 /* The system wide setup does not work with threads. */
1739 if (evsel->core.system_wide)
1742 /* The -ESRCH is perf event syscall errno for pid's not found. */
1746 /* If there's only one thread, let it fail. */
1747 if (threads->nr == 1)
1751 * We should remove fd for missing_thread first
1752 * because thread_map__remove() will decrease threads->nr.
1754 if (update_fds(evsel, nr_cpus, cpu_map_idx, threads->nr, thread))
1757 if (thread_map__remove(threads, thread))
1760 pr_warning("WARNING: Ignored open failure for pid %d\n",
1765 static int __open_attr__fprintf(FILE *fp, const char *name, const char *val,
1766 void *priv __maybe_unused)
1768 return fprintf(fp, " %-32s %s\n", name, val);
1771 static void display_attr(struct perf_event_attr *attr)
1773 if (verbose >= 2 || debug_peo_args) {
1774 fprintf(stderr, "%.60s\n", graph_dotted_line);
1775 fprintf(stderr, "perf_event_attr:\n");
1776 perf_event_attr__fprintf(stderr, attr, __open_attr__fprintf, NULL);
1777 fprintf(stderr, "%.60s\n", graph_dotted_line);
1781 bool evsel__precise_ip_fallback(struct evsel *evsel)
1783 /* Do not try less precise if not requested. */
1784 if (!evsel->precise_max)
1788 * We tried all the precise_ip values, and it's
1789 * still failing, so leave it to standard fallback.
1791 if (!evsel->core.attr.precise_ip) {
1792 evsel->core.attr.precise_ip = evsel->precise_ip_original;
1796 if (!evsel->precise_ip_original)
1797 evsel->precise_ip_original = evsel->core.attr.precise_ip;
1799 evsel->core.attr.precise_ip--;
1800 pr_debug2_peo("decreasing precise_ip by one (%d)\n", evsel->core.attr.precise_ip);
1801 display_attr(&evsel->core.attr);
1805 static struct perf_cpu_map *empty_cpu_map;
1806 static struct perf_thread_map *empty_thread_map;
1808 static int __evsel__prepare_open(struct evsel *evsel, struct perf_cpu_map *cpus,
1809 struct perf_thread_map *threads)
1813 if ((perf_missing_features.write_backward && evsel->core.attr.write_backward) ||
1814 (perf_missing_features.aux_output && evsel->core.attr.aux_output))
1818 if (empty_cpu_map == NULL) {
1819 empty_cpu_map = perf_cpu_map__dummy_new();
1820 if (empty_cpu_map == NULL)
1824 cpus = empty_cpu_map;
1827 if (threads == NULL) {
1828 if (empty_thread_map == NULL) {
1829 empty_thread_map = thread_map__new_by_tid(-1);
1830 if (empty_thread_map == NULL)
1834 threads = empty_thread_map;
1837 if (evsel->core.system_wide)
1840 nthreads = threads->nr;
1842 if (evsel->core.fd == NULL &&
1843 perf_evsel__alloc_fd(&evsel->core, perf_cpu_map__nr(cpus), nthreads) < 0)
1846 evsel->open_flags = PERF_FLAG_FD_CLOEXEC;
1848 evsel->open_flags |= PERF_FLAG_PID_CGROUP;
1853 static void evsel__disable_missing_features(struct evsel *evsel)
1855 if (perf_missing_features.weight_struct) {
1856 evsel__set_sample_bit(evsel, WEIGHT);
1857 evsel__reset_sample_bit(evsel, WEIGHT_STRUCT);
1859 if (perf_missing_features.clockid_wrong)
1860 evsel->core.attr.clockid = CLOCK_MONOTONIC; /* should always work */
1861 if (perf_missing_features.clockid) {
1862 evsel->core.attr.use_clockid = 0;
1863 evsel->core.attr.clockid = 0;
1865 if (perf_missing_features.cloexec)
1866 evsel->open_flags &= ~(unsigned long)PERF_FLAG_FD_CLOEXEC;
1867 if (perf_missing_features.mmap2)
1868 evsel->core.attr.mmap2 = 0;
1869 if (evsel->pmu && evsel->pmu->missing_features.exclude_guest)
1870 evsel->core.attr.exclude_guest = evsel->core.attr.exclude_host = 0;
1871 if (perf_missing_features.lbr_flags)
1872 evsel->core.attr.branch_sample_type &= ~(PERF_SAMPLE_BRANCH_NO_FLAGS |
1873 PERF_SAMPLE_BRANCH_NO_CYCLES);
1874 if (perf_missing_features.group_read && evsel->core.attr.inherit)
1875 evsel->core.attr.read_format &= ~(PERF_FORMAT_GROUP|PERF_FORMAT_ID);
1876 if (perf_missing_features.ksymbol)
1877 evsel->core.attr.ksymbol = 0;
1878 if (perf_missing_features.bpf)
1879 evsel->core.attr.bpf_event = 0;
1880 if (perf_missing_features.branch_hw_idx)
1881 evsel->core.attr.branch_sample_type &= ~PERF_SAMPLE_BRANCH_HW_INDEX;
1882 if (perf_missing_features.sample_id_all)
1883 evsel->core.attr.sample_id_all = 0;
1886 int evsel__prepare_open(struct evsel *evsel, struct perf_cpu_map *cpus,
1887 struct perf_thread_map *threads)
1891 err = __evsel__prepare_open(evsel, cpus, threads);
1895 evsel__disable_missing_features(evsel);
1900 bool evsel__detect_missing_features(struct evsel *evsel)
1903 * Must probe features in the order they were added to the
1904 * perf_event_attr interface.
1906 if (!perf_missing_features.weight_struct &&
1907 (evsel->core.attr.sample_type & PERF_SAMPLE_WEIGHT_STRUCT)) {
1908 perf_missing_features.weight_struct = true;
1909 pr_debug2("switching off weight struct support\n");
1911 } else if (!perf_missing_features.code_page_size &&
1912 (evsel->core.attr.sample_type & PERF_SAMPLE_CODE_PAGE_SIZE)) {
1913 perf_missing_features.code_page_size = true;
1914 pr_debug2_peo("Kernel has no PERF_SAMPLE_CODE_PAGE_SIZE support, bailing out\n");
1916 } else if (!perf_missing_features.data_page_size &&
1917 (evsel->core.attr.sample_type & PERF_SAMPLE_DATA_PAGE_SIZE)) {
1918 perf_missing_features.data_page_size = true;
1919 pr_debug2_peo("Kernel has no PERF_SAMPLE_DATA_PAGE_SIZE support, bailing out\n");
1921 } else if (!perf_missing_features.cgroup && evsel->core.attr.cgroup) {
1922 perf_missing_features.cgroup = true;
1923 pr_debug2_peo("Kernel has no cgroup sampling support, bailing out\n");
1925 } else if (!perf_missing_features.branch_hw_idx &&
1926 (evsel->core.attr.branch_sample_type & PERF_SAMPLE_BRANCH_HW_INDEX)) {
1927 perf_missing_features.branch_hw_idx = true;
1928 pr_debug2("switching off branch HW index support\n");
1930 } else if (!perf_missing_features.aux_output && evsel->core.attr.aux_output) {
1931 perf_missing_features.aux_output = true;
1932 pr_debug2_peo("Kernel has no attr.aux_output support, bailing out\n");
1934 } else if (!perf_missing_features.bpf && evsel->core.attr.bpf_event) {
1935 perf_missing_features.bpf = true;
1936 pr_debug2_peo("switching off bpf_event\n");
1938 } else if (!perf_missing_features.ksymbol && evsel->core.attr.ksymbol) {
1939 perf_missing_features.ksymbol = true;
1940 pr_debug2_peo("switching off ksymbol\n");
1942 } else if (!perf_missing_features.write_backward && evsel->core.attr.write_backward) {
1943 perf_missing_features.write_backward = true;
1944 pr_debug2_peo("switching off write_backward\n");
1946 } else if (!perf_missing_features.clockid_wrong && evsel->core.attr.use_clockid) {
1947 perf_missing_features.clockid_wrong = true;
1948 pr_debug2_peo("switching off clockid\n");
1950 } else if (!perf_missing_features.clockid && evsel->core.attr.use_clockid) {
1951 perf_missing_features.clockid = true;
1952 pr_debug2_peo("switching off use_clockid\n");
1954 } else if (!perf_missing_features.cloexec && (evsel->open_flags & PERF_FLAG_FD_CLOEXEC)) {
1955 perf_missing_features.cloexec = true;
1956 pr_debug2_peo("switching off cloexec flag\n");
1958 } else if (!perf_missing_features.mmap2 && evsel->core.attr.mmap2) {
1959 perf_missing_features.mmap2 = true;
1960 pr_debug2_peo("switching off mmap2\n");
1962 } else if ((evsel->core.attr.exclude_guest || evsel->core.attr.exclude_host) &&
1963 (evsel->pmu == NULL || evsel->pmu->missing_features.exclude_guest)) {
1964 if (evsel->pmu == NULL) {
1965 evsel->pmu = evsel__find_pmu(evsel);
1967 evsel->pmu->missing_features.exclude_guest = true;
1969 /* we cannot find PMU, disable attrs now */
1970 evsel->core.attr.exclude_host = false;
1971 evsel->core.attr.exclude_guest = false;
1975 if (evsel->exclude_GH) {
1976 pr_debug2_peo("PMU has no exclude_host/guest support, bailing out\n");
1979 if (!perf_missing_features.exclude_guest) {
1980 perf_missing_features.exclude_guest = true;
1981 pr_debug2_peo("switching off exclude_guest, exclude_host\n");
1984 } else if (!perf_missing_features.sample_id_all) {
1985 perf_missing_features.sample_id_all = true;
1986 pr_debug2_peo("switching off sample_id_all\n");
1988 } else if (!perf_missing_features.lbr_flags &&
1989 (evsel->core.attr.branch_sample_type &
1990 (PERF_SAMPLE_BRANCH_NO_CYCLES |
1991 PERF_SAMPLE_BRANCH_NO_FLAGS))) {
1992 perf_missing_features.lbr_flags = true;
1993 pr_debug2_peo("switching off branch sample type no (cycles/flags)\n");
1995 } else if (!perf_missing_features.group_read &&
1996 evsel->core.attr.inherit &&
1997 (evsel->core.attr.read_format & PERF_FORMAT_GROUP) &&
1998 evsel__is_group_leader(evsel)) {
1999 perf_missing_features.group_read = true;
2000 pr_debug2_peo("switching off group read\n");
2007 bool evsel__increase_rlimit(enum rlimit_action *set_rlimit)
2012 if (*set_rlimit < INCREASED_MAX) {
2015 if (getrlimit(RLIMIT_NOFILE, &l) == 0) {
2016 if (*set_rlimit == NO_CHANGE) {
2017 l.rlim_cur = l.rlim_max;
2019 l.rlim_cur = l.rlim_max + 1000;
2020 l.rlim_max = l.rlim_cur;
2022 if (setrlimit(RLIMIT_NOFILE, &l) == 0) {
2034 static int evsel__open_cpu(struct evsel *evsel, struct perf_cpu_map *cpus,
2035 struct perf_thread_map *threads,
2036 int start_cpu_map_idx, int end_cpu_map_idx)
2038 int idx, thread, nthreads;
2039 int pid = -1, err, old_errno;
2040 enum rlimit_action set_rlimit = NO_CHANGE;
2042 err = __evsel__prepare_open(evsel, cpus, threads);
2047 cpus = empty_cpu_map;
2049 if (threads == NULL)
2050 threads = empty_thread_map;
2052 if (evsel->core.system_wide)
2055 nthreads = threads->nr;
2058 pid = evsel->cgrp->fd;
2060 fallback_missing_features:
2061 evsel__disable_missing_features(evsel);
2063 display_attr(&evsel->core.attr);
2065 for (idx = start_cpu_map_idx; idx < end_cpu_map_idx; idx++) {
2067 for (thread = 0; thread < nthreads; thread++) {
2070 if (thread >= nthreads)
2073 if (!evsel->cgrp && !evsel->core.system_wide)
2074 pid = perf_thread_map__pid(threads, thread);
2076 group_fd = get_group_fd(evsel, idx, thread);
2080 pr_debug2_peo("sys_perf_event_open: pid %d cpu %d group_fd %d flags %#lx",
2081 pid, perf_cpu_map__cpu(cpus, idx).cpu, group_fd, evsel->open_flags);
2083 fd = sys_perf_event_open(&evsel->core.attr, pid,
2084 perf_cpu_map__cpu(cpus, idx).cpu,
2085 group_fd, evsel->open_flags);
2087 FD(evsel, idx, thread) = fd;
2092 pr_debug2_peo("\nsys_perf_event_open failed, error %d\n",
2097 bpf_counter__install_pe(evsel, idx, fd);
2099 if (unlikely(test_attr__enabled)) {
2100 test_attr__open(&evsel->core.attr, pid,
2101 perf_cpu_map__cpu(cpus, idx),
2102 fd, group_fd, evsel->open_flags);
2105 pr_debug2_peo(" = %d\n", fd);
2107 if (evsel->bpf_fd >= 0) {
2109 int bpf_fd = evsel->bpf_fd;
2112 PERF_EVENT_IOC_SET_BPF,
2114 if (err && errno != EEXIST) {
2115 pr_err("failed to attach bpf fd %d: %s\n",
2116 bpf_fd, strerror(errno));
2122 set_rlimit = NO_CHANGE;
2125 * If we succeeded but had to kill clockid, fail and
2126 * have evsel__open_strerror() print us a nice error.
2128 if (perf_missing_features.clockid ||
2129 perf_missing_features.clockid_wrong) {
2139 if (evsel__precise_ip_fallback(evsel))
2142 if (evsel__ignore_missing_thread(evsel, perf_cpu_map__nr(cpus),
2143 idx, threads, thread, err)) {
2144 /* We just removed 1 thread, so lower the upper nthreads limit. */
2147 /* ... and pretend like nothing have happened. */
2152 * perf stat needs between 5 and 22 fds per CPU. When we run out
2153 * of them try to increase the limits.
2155 if (err == -EMFILE && evsel__increase_rlimit(&set_rlimit))
2158 if (err != -EINVAL || idx > 0 || thread > 0)
2161 if (evsel__detect_missing_features(evsel))
2162 goto fallback_missing_features;
2165 threads->err_thread = thread;
2169 while (--thread >= 0) {
2170 if (FD(evsel, idx, thread) >= 0)
2171 close(FD(evsel, idx, thread));
2172 FD(evsel, idx, thread) = -1;
2175 } while (--idx >= 0);
2180 int evsel__open(struct evsel *evsel, struct perf_cpu_map *cpus,
2181 struct perf_thread_map *threads)
2183 return evsel__open_cpu(evsel, cpus, threads, 0, perf_cpu_map__nr(cpus));
2186 void evsel__close(struct evsel *evsel)
2188 perf_evsel__close(&evsel->core);
2189 perf_evsel__free_id(&evsel->core);
2192 int evsel__open_per_cpu(struct evsel *evsel, struct perf_cpu_map *cpus, int cpu_map_idx)
2194 if (cpu_map_idx == -1)
2195 return evsel__open_cpu(evsel, cpus, NULL, 0, perf_cpu_map__nr(cpus));
2197 return evsel__open_cpu(evsel, cpus, NULL, cpu_map_idx, cpu_map_idx + 1);
2200 int evsel__open_per_thread(struct evsel *evsel, struct perf_thread_map *threads)
2202 return evsel__open(evsel, NULL, threads);
2205 static int perf_evsel__parse_id_sample(const struct evsel *evsel,
2206 const union perf_event *event,
2207 struct perf_sample *sample)
2209 u64 type = evsel->core.attr.sample_type;
2210 const __u64 *array = event->sample.array;
2211 bool swapped = evsel->needs_swap;
2214 array += ((event->header.size -
2215 sizeof(event->header)) / sizeof(u64)) - 1;
2217 if (type & PERF_SAMPLE_IDENTIFIER) {
2218 sample->id = *array;
2222 if (type & PERF_SAMPLE_CPU) {
2225 /* undo swap of u64, then swap on individual u32s */
2226 u.val64 = bswap_64(u.val64);
2227 u.val32[0] = bswap_32(u.val32[0]);
2230 sample->cpu = u.val32[0];
2234 if (type & PERF_SAMPLE_STREAM_ID) {
2235 sample->stream_id = *array;
2239 if (type & PERF_SAMPLE_ID) {
2240 sample->id = *array;
2244 if (type & PERF_SAMPLE_TIME) {
2245 sample->time = *array;
2249 if (type & PERF_SAMPLE_TID) {
2252 /* undo swap of u64, then swap on individual u32s */
2253 u.val64 = bswap_64(u.val64);
2254 u.val32[0] = bswap_32(u.val32[0]);
2255 u.val32[1] = bswap_32(u.val32[1]);
2258 sample->pid = u.val32[0];
2259 sample->tid = u.val32[1];
2266 static inline bool overflow(const void *endp, u16 max_size, const void *offset,
2269 return size > max_size || offset + size > endp;
2272 #define OVERFLOW_CHECK(offset, size, max_size) \
2274 if (overflow(endp, (max_size), (offset), (size))) \
2278 #define OVERFLOW_CHECK_u64(offset) \
2279 OVERFLOW_CHECK(offset, sizeof(u64), sizeof(u64))
2282 perf_event__check_size(union perf_event *event, unsigned int sample_size)
2285 * The evsel's sample_size is based on PERF_SAMPLE_MASK which includes
2286 * up to PERF_SAMPLE_PERIOD. After that overflow() must be used to
2287 * check the format does not go past the end of the event.
2289 if (sample_size + sizeof(event->header) > event->header.size)
2295 void __weak arch_perf_parse_sample_weight(struct perf_sample *data,
2297 u64 type __maybe_unused)
2299 data->weight = *array;
2302 u64 evsel__bitfield_swap_branch_flags(u64 value)
2311 * mispred:1 //target mispredicted
2312 * predicted:1 //target predicted
2313 * in_tx:1 //in transaction
2314 * abort:1 //transaction abort
2315 * cycles:16 //cycle count to last branch
2316 * type:4 //branch type
2321 * Avoid bswap64() the entire branch_flag.value,
2322 * as it has variable bit-field sizes. Instead the
2323 * macro takes the bit-field position/size,
2324 * swaps it based on the host endianness.
2326 * tep_is_bigendian() is used here instead of
2327 * bigendian() to avoid python test fails.
2329 if (tep_is_bigendian()) {
2330 new_val = bitfield_swap(value, 0, 1);
2331 new_val |= bitfield_swap(value, 1, 1);
2332 new_val |= bitfield_swap(value, 2, 1);
2333 new_val |= bitfield_swap(value, 3, 1);
2334 new_val |= bitfield_swap(value, 4, 16);
2335 new_val |= bitfield_swap(value, 20, 4);
2336 new_val |= bitfield_swap(value, 24, 40);
2338 new_val = bitfield_swap(value, 63, 1);
2339 new_val |= bitfield_swap(value, 62, 1);
2340 new_val |= bitfield_swap(value, 61, 1);
2341 new_val |= bitfield_swap(value, 60, 1);
2342 new_val |= bitfield_swap(value, 44, 16);
2343 new_val |= bitfield_swap(value, 40, 4);
2344 new_val |= bitfield_swap(value, 0, 40);
2350 int evsel__parse_sample(struct evsel *evsel, union perf_event *event,
2351 struct perf_sample *data)
2353 u64 type = evsel->core.attr.sample_type;
2354 bool swapped = evsel->needs_swap;
2356 u16 max_size = event->header.size;
2357 const void *endp = (void *)event + max_size;
2361 * used for cross-endian analysis. See git commit 65014ab3
2362 * for why this goofiness is needed.
2366 memset(data, 0, sizeof(*data));
2367 data->cpu = data->pid = data->tid = -1;
2368 data->stream_id = data->id = data->time = -1ULL;
2369 data->period = evsel->core.attr.sample_period;
2370 data->cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK;
2371 data->misc = event->header.misc;
2373 data->data_src = PERF_MEM_DATA_SRC_NONE;
2376 if (event->header.type != PERF_RECORD_SAMPLE) {
2377 if (!evsel->core.attr.sample_id_all)
2379 return perf_evsel__parse_id_sample(evsel, event, data);
2382 array = event->sample.array;
2384 if (perf_event__check_size(event, evsel->sample_size))
2387 if (type & PERF_SAMPLE_IDENTIFIER) {
2392 if (type & PERF_SAMPLE_IP) {
2397 if (type & PERF_SAMPLE_TID) {
2400 /* undo swap of u64, then swap on individual u32s */
2401 u.val64 = bswap_64(u.val64);
2402 u.val32[0] = bswap_32(u.val32[0]);
2403 u.val32[1] = bswap_32(u.val32[1]);
2406 data->pid = u.val32[0];
2407 data->tid = u.val32[1];
2411 if (type & PERF_SAMPLE_TIME) {
2412 data->time = *array;
2416 if (type & PERF_SAMPLE_ADDR) {
2417 data->addr = *array;
2421 if (type & PERF_SAMPLE_ID) {
2426 if (type & PERF_SAMPLE_STREAM_ID) {
2427 data->stream_id = *array;
2431 if (type & PERF_SAMPLE_CPU) {
2435 /* undo swap of u64, then swap on individual u32s */
2436 u.val64 = bswap_64(u.val64);
2437 u.val32[0] = bswap_32(u.val32[0]);
2440 data->cpu = u.val32[0];
2444 if (type & PERF_SAMPLE_PERIOD) {
2445 data->period = *array;
2449 if (type & PERF_SAMPLE_READ) {
2450 u64 read_format = evsel->core.attr.read_format;
2452 OVERFLOW_CHECK_u64(array);
2453 if (read_format & PERF_FORMAT_GROUP)
2454 data->read.group.nr = *array;
2456 data->read.one.value = *array;
2460 if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED) {
2461 OVERFLOW_CHECK_u64(array);
2462 data->read.time_enabled = *array;
2466 if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING) {
2467 OVERFLOW_CHECK_u64(array);
2468 data->read.time_running = *array;
2472 /* PERF_FORMAT_ID is forced for PERF_SAMPLE_READ */
2473 if (read_format & PERF_FORMAT_GROUP) {
2474 const u64 max_group_nr = UINT64_MAX /
2475 sizeof(struct sample_read_value);
2477 if (data->read.group.nr > max_group_nr)
2480 sz = data->read.group.nr * sample_read_value_size(read_format);
2481 OVERFLOW_CHECK(array, sz, max_size);
2482 data->read.group.values =
2483 (struct sample_read_value *)array;
2484 array = (void *)array + sz;
2486 OVERFLOW_CHECK_u64(array);
2487 data->read.one.id = *array;
2490 if (read_format & PERF_FORMAT_LOST) {
2491 OVERFLOW_CHECK_u64(array);
2492 data->read.one.lost = *array;
2498 if (type & PERF_SAMPLE_CALLCHAIN) {
2499 const u64 max_callchain_nr = UINT64_MAX / sizeof(u64);
2501 OVERFLOW_CHECK_u64(array);
2502 data->callchain = (struct ip_callchain *)array++;
2503 if (data->callchain->nr > max_callchain_nr)
2505 sz = data->callchain->nr * sizeof(u64);
2506 OVERFLOW_CHECK(array, sz, max_size);
2507 array = (void *)array + sz;
2510 if (type & PERF_SAMPLE_RAW) {
2511 OVERFLOW_CHECK_u64(array);
2515 * Undo swap of u64, then swap on individual u32s,
2516 * get the size of the raw area and undo all of the
2517 * swap. The pevent interface handles endianness by
2521 u.val64 = bswap_64(u.val64);
2522 u.val32[0] = bswap_32(u.val32[0]);
2523 u.val32[1] = bswap_32(u.val32[1]);
2525 data->raw_size = u.val32[0];
2528 * The raw data is aligned on 64bits including the
2529 * u32 size, so it's safe to use mem_bswap_64.
2532 mem_bswap_64((void *) array, data->raw_size);
2534 array = (void *)array + sizeof(u32);
2536 OVERFLOW_CHECK(array, data->raw_size, max_size);
2537 data->raw_data = (void *)array;
2538 array = (void *)array + data->raw_size;
2541 if (type & PERF_SAMPLE_BRANCH_STACK) {
2542 const u64 max_branch_nr = UINT64_MAX /
2543 sizeof(struct branch_entry);
2544 struct branch_entry *e;
2547 OVERFLOW_CHECK_u64(array);
2548 data->branch_stack = (struct branch_stack *)array++;
2550 if (data->branch_stack->nr > max_branch_nr)
2553 sz = data->branch_stack->nr * sizeof(struct branch_entry);
2554 if (evsel__has_branch_hw_idx(evsel)) {
2556 e = &data->branch_stack->entries[0];
2558 data->no_hw_idx = true;
2560 * if the PERF_SAMPLE_BRANCH_HW_INDEX is not applied,
2561 * only nr and entries[] will be output by kernel.
2563 e = (struct branch_entry *)&data->branch_stack->hw_idx;
2568 * struct branch_flag does not have endian
2569 * specific bit field definition. And bswap
2570 * will not resolve the issue, since these
2573 * evsel__bitfield_swap_branch_flags() uses a
2574 * bitfield_swap macro to swap the bit position
2575 * based on the host endians.
2577 for (i = 0; i < data->branch_stack->nr; i++, e++)
2578 e->flags.value = evsel__bitfield_swap_branch_flags(e->flags.value);
2581 OVERFLOW_CHECK(array, sz, max_size);
2582 array = (void *)array + sz;
2585 if (type & PERF_SAMPLE_REGS_USER) {
2586 OVERFLOW_CHECK_u64(array);
2587 data->user_regs.abi = *array;
2590 if (data->user_regs.abi) {
2591 u64 mask = evsel->core.attr.sample_regs_user;
2593 sz = hweight64(mask) * sizeof(u64);
2594 OVERFLOW_CHECK(array, sz, max_size);
2595 data->user_regs.mask = mask;
2596 data->user_regs.regs = (u64 *)array;
2597 array = (void *)array + sz;
2601 if (type & PERF_SAMPLE_STACK_USER) {
2602 OVERFLOW_CHECK_u64(array);
2605 data->user_stack.offset = ((char *)(array - 1)
2609 data->user_stack.size = 0;
2611 OVERFLOW_CHECK(array, sz, max_size);
2612 data->user_stack.data = (char *)array;
2613 array = (void *)array + sz;
2614 OVERFLOW_CHECK_u64(array);
2615 data->user_stack.size = *array++;
2616 if (WARN_ONCE(data->user_stack.size > sz,
2617 "user stack dump failure\n"))
2622 if (type & PERF_SAMPLE_WEIGHT_TYPE) {
2623 OVERFLOW_CHECK_u64(array);
2624 arch_perf_parse_sample_weight(data, array, type);
2628 if (type & PERF_SAMPLE_DATA_SRC) {
2629 OVERFLOW_CHECK_u64(array);
2630 data->data_src = *array;
2634 if (type & PERF_SAMPLE_TRANSACTION) {
2635 OVERFLOW_CHECK_u64(array);
2636 data->transaction = *array;
2640 data->intr_regs.abi = PERF_SAMPLE_REGS_ABI_NONE;
2641 if (type & PERF_SAMPLE_REGS_INTR) {
2642 OVERFLOW_CHECK_u64(array);
2643 data->intr_regs.abi = *array;
2646 if (data->intr_regs.abi != PERF_SAMPLE_REGS_ABI_NONE) {
2647 u64 mask = evsel->core.attr.sample_regs_intr;
2649 sz = hweight64(mask) * sizeof(u64);
2650 OVERFLOW_CHECK(array, sz, max_size);
2651 data->intr_regs.mask = mask;
2652 data->intr_regs.regs = (u64 *)array;
2653 array = (void *)array + sz;
2657 data->phys_addr = 0;
2658 if (type & PERF_SAMPLE_PHYS_ADDR) {
2659 data->phys_addr = *array;
2664 if (type & PERF_SAMPLE_CGROUP) {
2665 data->cgroup = *array;
2669 data->data_page_size = 0;
2670 if (type & PERF_SAMPLE_DATA_PAGE_SIZE) {
2671 data->data_page_size = *array;
2675 data->code_page_size = 0;
2676 if (type & PERF_SAMPLE_CODE_PAGE_SIZE) {
2677 data->code_page_size = *array;
2681 if (type & PERF_SAMPLE_AUX) {
2682 OVERFLOW_CHECK_u64(array);
2685 OVERFLOW_CHECK(array, sz, max_size);
2686 /* Undo swap of data */
2688 mem_bswap_64((char *)array, sz);
2689 data->aux_sample.size = sz;
2690 data->aux_sample.data = (char *)array;
2691 array = (void *)array + sz;
2697 int evsel__parse_sample_timestamp(struct evsel *evsel, union perf_event *event,
2700 u64 type = evsel->core.attr.sample_type;
2703 if (!(type & PERF_SAMPLE_TIME))
2706 if (event->header.type != PERF_RECORD_SAMPLE) {
2707 struct perf_sample data = {
2711 if (!evsel->core.attr.sample_id_all)
2713 if (perf_evsel__parse_id_sample(evsel, event, &data))
2716 *timestamp = data.time;
2720 array = event->sample.array;
2722 if (perf_event__check_size(event, evsel->sample_size))
2725 if (type & PERF_SAMPLE_IDENTIFIER)
2728 if (type & PERF_SAMPLE_IP)
2731 if (type & PERF_SAMPLE_TID)
2734 if (type & PERF_SAMPLE_TIME)
2735 *timestamp = *array;
2740 u16 evsel__id_hdr_size(struct evsel *evsel)
2742 u64 sample_type = evsel->core.attr.sample_type;
2745 if (sample_type & PERF_SAMPLE_TID)
2746 size += sizeof(u64);
2748 if (sample_type & PERF_SAMPLE_TIME)
2749 size += sizeof(u64);
2751 if (sample_type & PERF_SAMPLE_ID)
2752 size += sizeof(u64);
2754 if (sample_type & PERF_SAMPLE_STREAM_ID)
2755 size += sizeof(u64);
2757 if (sample_type & PERF_SAMPLE_CPU)
2758 size += sizeof(u64);
2760 if (sample_type & PERF_SAMPLE_IDENTIFIER)
2761 size += sizeof(u64);
2766 struct tep_format_field *evsel__field(struct evsel *evsel, const char *name)
2768 return tep_find_field(evsel->tp_format, name);
2771 void *evsel__rawptr(struct evsel *evsel, struct perf_sample *sample, const char *name)
2773 struct tep_format_field *field = evsel__field(evsel, name);
2779 offset = field->offset;
2781 if (field->flags & TEP_FIELD_IS_DYNAMIC) {
2782 offset = *(int *)(sample->raw_data + field->offset);
2784 if (field->flags & TEP_FIELD_IS_RELATIVE)
2785 offset += field->offset + field->size;
2788 return sample->raw_data + offset;
2791 u64 format_field__intval(struct tep_format_field *field, struct perf_sample *sample,
2795 void *ptr = sample->raw_data + field->offset;
2797 switch (field->size) {
2801 value = *(u16 *)ptr;
2804 value = *(u32 *)ptr;
2807 memcpy(&value, ptr, sizeof(u64));
2816 switch (field->size) {
2818 return bswap_16(value);
2820 return bswap_32(value);
2822 return bswap_64(value);
2830 u64 evsel__intval(struct evsel *evsel, struct perf_sample *sample, const char *name)
2832 struct tep_format_field *field = evsel__field(evsel, name);
2837 return field ? format_field__intval(field, sample, evsel->needs_swap) : 0;
2840 bool evsel__fallback(struct evsel *evsel, int err, char *msg, size_t msgsize)
2844 if ((err == ENOENT || err == ENXIO || err == ENODEV) &&
2845 evsel->core.attr.type == PERF_TYPE_HARDWARE &&
2846 evsel->core.attr.config == PERF_COUNT_HW_CPU_CYCLES) {
2848 * If it's cycles then fall back to hrtimer based
2849 * cpu-clock-tick sw counter, which is always available even if
2852 * PPC returns ENXIO until 2.6.37 (behavior changed with commit
2855 scnprintf(msg, msgsize, "%s",
2856 "The cycles event is not supported, trying to fall back to cpu-clock-ticks");
2858 evsel->core.attr.type = PERF_TYPE_SOFTWARE;
2859 evsel->core.attr.config = PERF_COUNT_SW_CPU_CLOCK;
2861 zfree(&evsel->name);
2863 } else if (err == EACCES && !evsel->core.attr.exclude_kernel &&
2864 (paranoid = perf_event_paranoid()) > 1) {
2865 const char *name = evsel__name(evsel);
2867 const char *sep = ":";
2869 /* If event has exclude user then don't exclude kernel. */
2870 if (evsel->core.attr.exclude_user)
2873 /* Is there already the separator in the name. */
2874 if (strchr(name, '/') ||
2875 (strchr(name, ':') && !evsel->is_libpfm_event))
2878 if (asprintf(&new_name, "%s%su", name, sep) < 0)
2883 evsel->name = new_name;
2884 scnprintf(msg, msgsize, "kernel.perf_event_paranoid=%d, trying "
2885 "to fall back to excluding kernel and hypervisor "
2886 " samples", paranoid);
2887 evsel->core.attr.exclude_kernel = 1;
2888 evsel->core.attr.exclude_hv = 1;
2896 static bool find_process(const char *name)
2898 size_t len = strlen(name);
2903 dir = opendir(procfs__mountpoint());
2907 /* Walk through the directory. */
2908 while (ret && (d = readdir(dir)) != NULL) {
2909 char path[PATH_MAX];
2913 if ((d->d_type != DT_DIR) ||
2914 !strcmp(".", d->d_name) ||
2915 !strcmp("..", d->d_name))
2918 scnprintf(path, sizeof(path), "%s/%s/comm",
2919 procfs__mountpoint(), d->d_name);
2921 if (filename__read_str(path, &data, &size))
2924 ret = strncmp(name, data, len);
2929 return ret ? false : true;
2932 static bool is_amd(const char *arch, const char *cpuid)
2934 return arch && !strcmp("x86", arch) && cpuid && strstarts(cpuid, "AuthenticAMD");
2937 static bool is_amd_ibs(struct evsel *evsel)
2939 return evsel->core.attr.precise_ip
2940 || (evsel->pmu_name && !strncmp(evsel->pmu_name, "ibs", 3));
2943 int evsel__open_strerror(struct evsel *evsel, struct target *target,
2944 int err, char *msg, size_t size)
2946 struct perf_env *env = evsel__env(evsel);
2947 const char *arch = perf_env__arch(env);
2948 const char *cpuid = perf_env__cpuid(env);
2949 char sbuf[STRERR_BUFSIZE];
2950 int printed = 0, enforced = 0;
2955 printed += scnprintf(msg + printed, size - printed,
2956 "Access to performance monitoring and observability operations is limited.\n");
2958 if (!sysfs__read_int("fs/selinux/enforce", &enforced)) {
2960 printed += scnprintf(msg + printed, size - printed,
2961 "Enforced MAC policy settings (SELinux) can limit access to performance\n"
2962 "monitoring and observability operations. Inspect system audit records for\n"
2963 "more perf_event access control information and adjusting the policy.\n");
2968 printed += scnprintf(msg, size,
2969 "No permission to enable %s event.\n\n", evsel__name(evsel));
2971 return scnprintf(msg + printed, size - printed,
2972 "Consider adjusting /proc/sys/kernel/perf_event_paranoid setting to open\n"
2973 "access to performance monitoring and observability operations for processes\n"
2974 "without CAP_PERFMON, CAP_SYS_PTRACE or CAP_SYS_ADMIN Linux capability.\n"
2975 "More information can be found at 'Perf events and tool security' document:\n"
2976 "https://www.kernel.org/doc/html/latest/admin-guide/perf-security.html\n"
2977 "perf_event_paranoid setting is %d:\n"
2978 " -1: Allow use of (almost) all events by all users\n"
2979 " Ignore mlock limit after perf_event_mlock_kb without CAP_IPC_LOCK\n"
2980 ">= 0: Disallow raw and ftrace function tracepoint access\n"
2981 ">= 1: Disallow CPU event access\n"
2982 ">= 2: Disallow kernel profiling\n"
2983 "To make the adjusted perf_event_paranoid setting permanent preserve it\n"
2984 "in /etc/sysctl.conf (e.g. kernel.perf_event_paranoid = <setting>)",
2985 perf_event_paranoid());
2987 return scnprintf(msg, size, "The %s event is not supported.", evsel__name(evsel));
2989 return scnprintf(msg, size, "%s",
2990 "Too many events are opened.\n"
2991 "Probably the maximum number of open file descriptors has been reached.\n"
2992 "Hint: Try again after reducing the number of events.\n"
2993 "Hint: Try increasing the limit with 'ulimit -n <limit>'");
2995 if (evsel__has_callchain(evsel) &&
2996 access("/proc/sys/kernel/perf_event_max_stack", F_OK) == 0)
2997 return scnprintf(msg, size,
2998 "Not enough memory to setup event with callchain.\n"
2999 "Hint: Try tweaking /proc/sys/kernel/perf_event_max_stack\n"
3000 "Hint: Current value: %d", sysctl__max_stack());
3003 if (target->cpu_list)
3004 return scnprintf(msg, size, "%s",
3005 "No such device - did you specify an out-of-range profile CPU?");
3008 if (evsel->core.attr.sample_type & PERF_SAMPLE_BRANCH_STACK)
3009 return scnprintf(msg, size,
3010 "%s: PMU Hardware or event type doesn't support branch stack sampling.",
3011 evsel__name(evsel));
3012 if (evsel->core.attr.aux_output)
3013 return scnprintf(msg, size,
3014 "%s: PMU Hardware doesn't support 'aux_output' feature",
3015 evsel__name(evsel));
3016 if (evsel->core.attr.sample_period != 0)
3017 return scnprintf(msg, size,
3018 "%s: PMU Hardware doesn't support sampling/overflow-interrupts. Try 'perf stat'",
3019 evsel__name(evsel));
3020 if (evsel->core.attr.precise_ip)
3021 return scnprintf(msg, size, "%s",
3022 "\'precise\' request may not be supported. Try removing 'p' modifier.");
3023 #if defined(__i386__) || defined(__x86_64__)
3024 if (evsel->core.attr.type == PERF_TYPE_HARDWARE)
3025 return scnprintf(msg, size, "%s",
3026 "No hardware sampling interrupt available.\n");
3030 if (find_process("oprofiled"))
3031 return scnprintf(msg, size,
3032 "The PMU counters are busy/taken by another profiler.\n"
3033 "We found oprofile daemon running, please stop it and try again.");
3036 if (evsel->core.attr.sample_type & PERF_SAMPLE_CODE_PAGE_SIZE && perf_missing_features.code_page_size)
3037 return scnprintf(msg, size, "Asking for the code page size isn't supported by this kernel.");
3038 if (evsel->core.attr.sample_type & PERF_SAMPLE_DATA_PAGE_SIZE && perf_missing_features.data_page_size)
3039 return scnprintf(msg, size, "Asking for the data page size isn't supported by this kernel.");
3040 if (evsel->core.attr.write_backward && perf_missing_features.write_backward)
3041 return scnprintf(msg, size, "Reading from overwrite event is not supported by this kernel.");
3042 if (perf_missing_features.clockid)
3043 return scnprintf(msg, size, "clockid feature not supported.");
3044 if (perf_missing_features.clockid_wrong)
3045 return scnprintf(msg, size, "wrong clockid (%d).", clockid);
3046 if (perf_missing_features.aux_output)
3047 return scnprintf(msg, size, "The 'aux_output' feature is not supported, update the kernel.");
3048 if (!target__has_cpu(target))
3049 return scnprintf(msg, size,
3050 "Invalid event (%s) in per-thread mode, enable system wide with '-a'.",
3051 evsel__name(evsel));
3052 if (is_amd(arch, cpuid)) {
3053 if (is_amd_ibs(evsel)) {
3054 if (evsel->core.attr.exclude_kernel)
3055 return scnprintf(msg, size,
3056 "AMD IBS can't exclude kernel events. Try running at a higher privilege level.");
3057 if (!evsel->core.system_wide)
3058 return scnprintf(msg, size,
3059 "AMD IBS may only be available in system-wide/per-cpu mode. Try using -a, or -C and workload affinity");
3065 return scnprintf(msg, size, "Cannot collect data source with the load latency event alone. "
3066 "Please add an auxiliary event in front of the load latency event.");
3071 return scnprintf(msg, size,
3072 "The sys_perf_event_open() syscall returned with %d (%s) for event (%s).\n"
3073 "/bin/dmesg | grep -i perf may provide additional information.\n",
3074 err, str_error_r(err, sbuf, sizeof(sbuf)), evsel__name(evsel));
3077 struct perf_env *evsel__env(struct evsel *evsel)
3079 if (evsel && evsel->evlist && evsel->evlist->env)
3080 return evsel->evlist->env;
3084 static int store_evsel_ids(struct evsel *evsel, struct evlist *evlist)
3086 int cpu_map_idx, thread;
3088 for (cpu_map_idx = 0; cpu_map_idx < xyarray__max_x(evsel->core.fd); cpu_map_idx++) {
3089 for (thread = 0; thread < xyarray__max_y(evsel->core.fd);
3091 int fd = FD(evsel, cpu_map_idx, thread);
3093 if (perf_evlist__id_add_fd(&evlist->core, &evsel->core,
3094 cpu_map_idx, thread, fd) < 0)
3102 int evsel__store_ids(struct evsel *evsel, struct evlist *evlist)
3104 struct perf_cpu_map *cpus = evsel->core.cpus;
3105 struct perf_thread_map *threads = evsel->core.threads;
3107 if (perf_evsel__alloc_id(&evsel->core, perf_cpu_map__nr(cpus), threads->nr))
3110 return store_evsel_ids(evsel, evlist);
3113 void evsel__zero_per_pkg(struct evsel *evsel)
3115 struct hashmap_entry *cur;
3118 if (evsel->per_pkg_mask) {
3119 hashmap__for_each_entry(evsel->per_pkg_mask, cur, bkt)
3120 free((char *)cur->key);
3122 hashmap__clear(evsel->per_pkg_mask);
3126 bool evsel__is_hybrid(struct evsel *evsel)
3128 return evsel->pmu_name && perf_pmu__is_hybrid(evsel->pmu_name);
3131 struct evsel *evsel__leader(struct evsel *evsel)
3133 return container_of(evsel->core.leader, struct evsel, core);
3136 bool evsel__has_leader(struct evsel *evsel, struct evsel *leader)
3138 return evsel->core.leader == &leader->core;
3141 bool evsel__is_leader(struct evsel *evsel)
3143 return evsel__has_leader(evsel, evsel);
3146 void evsel__set_leader(struct evsel *evsel, struct evsel *leader)
3148 evsel->core.leader = &leader->core;
3151 int evsel__source_count(const struct evsel *evsel)
3156 evlist__for_each_entry(evsel->evlist, pos) {
3157 if (pos->metric_leader == evsel)
3163 bool __weak arch_evsel__must_be_in_group(const struct evsel *evsel __maybe_unused)
3169 * Remove an event from a given group (leader).
3170 * Some events, e.g., perf metrics Topdown events,
3171 * must always be grouped. Ignore the events.
3173 void evsel__remove_from_group(struct evsel *evsel, struct evsel *leader)
3175 if (!arch_evsel__must_be_in_group(evsel) && evsel != leader) {
3176 evsel__set_leader(evsel, evsel);
3177 evsel->core.nr_members = 0;
3178 leader->core.nr_members--;