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 static int evsel__hw_name(struct evsel *evsel, char *bf, size_t size)
599 int r = scnprintf(bf, size, "%s", __evsel__hw_name(evsel->core.attr.config));
600 return r + evsel__add_modifiers(evsel, bf + r, size - r);
603 const char *const evsel__sw_names[PERF_COUNT_SW_MAX] = {
616 static const char *__evsel__sw_name(u64 config)
618 if (config < PERF_COUNT_SW_MAX && evsel__sw_names[config])
619 return evsel__sw_names[config];
620 return "unknown-software";
623 static int evsel__sw_name(struct evsel *evsel, char *bf, size_t size)
625 int r = scnprintf(bf, size, "%s", __evsel__sw_name(evsel->core.attr.config));
626 return r + evsel__add_modifiers(evsel, bf + r, size - r);
629 static int evsel__tool_name(enum perf_tool_event ev, char *bf, size_t size)
631 return scnprintf(bf, size, "%s", perf_tool_event__to_str(ev));
634 static int __evsel__bp_name(char *bf, size_t size, u64 addr, u64 type)
638 r = scnprintf(bf, size, "mem:0x%" PRIx64 ":", addr);
640 if (type & HW_BREAKPOINT_R)
641 r += scnprintf(bf + r, size - r, "r");
643 if (type & HW_BREAKPOINT_W)
644 r += scnprintf(bf + r, size - r, "w");
646 if (type & HW_BREAKPOINT_X)
647 r += scnprintf(bf + r, size - r, "x");
652 static int evsel__bp_name(struct evsel *evsel, char *bf, size_t size)
654 struct perf_event_attr *attr = &evsel->core.attr;
655 int r = __evsel__bp_name(bf, size, attr->bp_addr, attr->bp_type);
656 return r + evsel__add_modifiers(evsel, bf + r, size - r);
659 const char *const evsel__hw_cache[PERF_COUNT_HW_CACHE_MAX][EVSEL__MAX_ALIASES] = {
660 { "L1-dcache", "l1-d", "l1d", "L1-data", },
661 { "L1-icache", "l1-i", "l1i", "L1-instruction", },
663 { "dTLB", "d-tlb", "Data-TLB", },
664 { "iTLB", "i-tlb", "Instruction-TLB", },
665 { "branch", "branches", "bpu", "btb", "bpc", },
669 const char *const evsel__hw_cache_op[PERF_COUNT_HW_CACHE_OP_MAX][EVSEL__MAX_ALIASES] = {
670 { "load", "loads", "read", },
671 { "store", "stores", "write", },
672 { "prefetch", "prefetches", "speculative-read", "speculative-load", },
675 const char *const evsel__hw_cache_result[PERF_COUNT_HW_CACHE_RESULT_MAX][EVSEL__MAX_ALIASES] = {
676 { "refs", "Reference", "ops", "access", },
677 { "misses", "miss", },
680 #define C(x) PERF_COUNT_HW_CACHE_##x
681 #define CACHE_READ (1 << C(OP_READ))
682 #define CACHE_WRITE (1 << C(OP_WRITE))
683 #define CACHE_PREFETCH (1 << C(OP_PREFETCH))
684 #define COP(x) (1 << x)
687 * cache operation stat
688 * L1I : Read and prefetch only
689 * ITLB and BPU : Read-only
691 static const unsigned long evsel__hw_cache_stat[C(MAX)] = {
692 [C(L1D)] = (CACHE_READ | CACHE_WRITE | CACHE_PREFETCH),
693 [C(L1I)] = (CACHE_READ | CACHE_PREFETCH),
694 [C(LL)] = (CACHE_READ | CACHE_WRITE | CACHE_PREFETCH),
695 [C(DTLB)] = (CACHE_READ | CACHE_WRITE | CACHE_PREFETCH),
696 [C(ITLB)] = (CACHE_READ),
697 [C(BPU)] = (CACHE_READ),
698 [C(NODE)] = (CACHE_READ | CACHE_WRITE | CACHE_PREFETCH),
701 bool evsel__is_cache_op_valid(u8 type, u8 op)
703 if (evsel__hw_cache_stat[type] & COP(op))
704 return true; /* valid */
706 return false; /* invalid */
709 int __evsel__hw_cache_type_op_res_name(u8 type, u8 op, u8 result, char *bf, size_t size)
712 return scnprintf(bf, size, "%s-%s-%s", evsel__hw_cache[type][0],
713 evsel__hw_cache_op[op][0],
714 evsel__hw_cache_result[result][0]);
717 return scnprintf(bf, size, "%s-%s", evsel__hw_cache[type][0],
718 evsel__hw_cache_op[op][1]);
721 static int __evsel__hw_cache_name(u64 config, char *bf, size_t size)
723 u8 op, result, type = (config >> 0) & 0xff;
724 const char *err = "unknown-ext-hardware-cache-type";
726 if (type >= PERF_COUNT_HW_CACHE_MAX)
729 op = (config >> 8) & 0xff;
730 err = "unknown-ext-hardware-cache-op";
731 if (op >= PERF_COUNT_HW_CACHE_OP_MAX)
734 result = (config >> 16) & 0xff;
735 err = "unknown-ext-hardware-cache-result";
736 if (result >= PERF_COUNT_HW_CACHE_RESULT_MAX)
739 err = "invalid-cache";
740 if (!evsel__is_cache_op_valid(type, op))
743 return __evsel__hw_cache_type_op_res_name(type, op, result, bf, size);
745 return scnprintf(bf, size, "%s", err);
748 static int evsel__hw_cache_name(struct evsel *evsel, char *bf, size_t size)
750 int ret = __evsel__hw_cache_name(evsel->core.attr.config, bf, size);
751 return ret + evsel__add_modifiers(evsel, bf + ret, size - ret);
754 static int evsel__raw_name(struct evsel *evsel, char *bf, size_t size)
756 int ret = scnprintf(bf, size, "raw 0x%" PRIx64, evsel->core.attr.config);
757 return ret + evsel__add_modifiers(evsel, bf + ret, size - ret);
760 const char *evsel__name(struct evsel *evsel)
770 switch (evsel->core.attr.type) {
772 evsel__raw_name(evsel, bf, sizeof(bf));
775 case PERF_TYPE_HARDWARE:
776 evsel__hw_name(evsel, bf, sizeof(bf));
779 case PERF_TYPE_HW_CACHE:
780 evsel__hw_cache_name(evsel, bf, sizeof(bf));
783 case PERF_TYPE_SOFTWARE:
784 if (evsel__is_tool(evsel))
785 evsel__tool_name(evsel->tool_event, bf, sizeof(bf));
787 evsel__sw_name(evsel, bf, sizeof(bf));
790 case PERF_TYPE_TRACEPOINT:
791 scnprintf(bf, sizeof(bf), "%s", "unknown tracepoint");
794 case PERF_TYPE_BREAKPOINT:
795 evsel__bp_name(evsel, bf, sizeof(bf));
799 scnprintf(bf, sizeof(bf), "unknown attr type: %d",
800 evsel->core.attr.type);
804 evsel->name = strdup(bf);
812 const char *evsel__metric_id(const struct evsel *evsel)
814 if (evsel->metric_id)
815 return evsel->metric_id;
817 if (evsel__is_tool(evsel))
818 return perf_tool_event__to_str(evsel->tool_event);
823 const char *evsel__group_name(struct evsel *evsel)
825 return evsel->group_name ?: "anon group";
829 * Returns the group details for the specified leader,
830 * with following rules.
832 * For record -e '{cycles,instructions}'
833 * 'anon group { cycles:u, instructions:u }'
835 * For record -e 'cycles,instructions' and report --group
836 * 'cycles:u, instructions:u'
838 int evsel__group_desc(struct evsel *evsel, char *buf, size_t size)
842 const char *group_name = evsel__group_name(evsel);
844 if (!evsel->forced_leader)
845 ret = scnprintf(buf, size, "%s { ", group_name);
847 ret += scnprintf(buf + ret, size - ret, "%s", evsel__name(evsel));
849 for_each_group_member(pos, evsel)
850 ret += scnprintf(buf + ret, size - ret, ", %s", evsel__name(pos));
852 if (!evsel->forced_leader)
853 ret += scnprintf(buf + ret, size - ret, " }");
858 static void __evsel__config_callchain(struct evsel *evsel, struct record_opts *opts,
859 struct callchain_param *param)
861 bool function = evsel__is_function_event(evsel);
862 struct perf_event_attr *attr = &evsel->core.attr;
864 evsel__set_sample_bit(evsel, CALLCHAIN);
866 attr->sample_max_stack = param->max_stack;
868 if (opts->kernel_callchains)
869 attr->exclude_callchain_user = 1;
870 if (opts->user_callchains)
871 attr->exclude_callchain_kernel = 1;
872 if (param->record_mode == CALLCHAIN_LBR) {
873 if (!opts->branch_stack) {
874 if (attr->exclude_user) {
875 pr_warning("LBR callstack option is only available "
876 "to get user callchain information. "
877 "Falling back to framepointers.\n");
879 evsel__set_sample_bit(evsel, BRANCH_STACK);
880 attr->branch_sample_type = PERF_SAMPLE_BRANCH_USER |
881 PERF_SAMPLE_BRANCH_CALL_STACK |
882 PERF_SAMPLE_BRANCH_NO_CYCLES |
883 PERF_SAMPLE_BRANCH_NO_FLAGS |
884 PERF_SAMPLE_BRANCH_HW_INDEX;
887 pr_warning("Cannot use LBR callstack with branch stack. "
888 "Falling back to framepointers.\n");
891 if (param->record_mode == CALLCHAIN_DWARF) {
893 evsel__set_sample_bit(evsel, REGS_USER);
894 evsel__set_sample_bit(evsel, STACK_USER);
895 if (opts->sample_user_regs && DWARF_MINIMAL_REGS != PERF_REGS_MASK) {
896 attr->sample_regs_user |= DWARF_MINIMAL_REGS;
897 pr_warning("WARNING: The use of --call-graph=dwarf may require all the user registers, "
898 "specifying a subset with --user-regs may render DWARF unwinding unreliable, "
899 "so the minimal registers set (IP, SP) is explicitly forced.\n");
901 attr->sample_regs_user |= arch__user_reg_mask();
903 attr->sample_stack_user = param->dump_size;
904 attr->exclude_callchain_user = 1;
906 pr_info("Cannot use DWARF unwind for function trace event,"
907 " falling back to framepointers.\n");
912 pr_info("Disabling user space callchains for function trace event.\n");
913 attr->exclude_callchain_user = 1;
917 void evsel__config_callchain(struct evsel *evsel, struct record_opts *opts,
918 struct callchain_param *param)
921 return __evsel__config_callchain(evsel, opts, param);
924 static void evsel__reset_callgraph(struct evsel *evsel, struct callchain_param *param)
926 struct perf_event_attr *attr = &evsel->core.attr;
928 evsel__reset_sample_bit(evsel, CALLCHAIN);
929 if (param->record_mode == CALLCHAIN_LBR) {
930 evsel__reset_sample_bit(evsel, BRANCH_STACK);
931 attr->branch_sample_type &= ~(PERF_SAMPLE_BRANCH_USER |
932 PERF_SAMPLE_BRANCH_CALL_STACK |
933 PERF_SAMPLE_BRANCH_HW_INDEX);
935 if (param->record_mode == CALLCHAIN_DWARF) {
936 evsel__reset_sample_bit(evsel, REGS_USER);
937 evsel__reset_sample_bit(evsel, STACK_USER);
941 static void evsel__apply_config_terms(struct evsel *evsel,
942 struct record_opts *opts, bool track)
944 struct evsel_config_term *term;
945 struct list_head *config_terms = &evsel->config_terms;
946 struct perf_event_attr *attr = &evsel->core.attr;
947 /* callgraph default */
948 struct callchain_param param = {
949 .record_mode = callchain_param.record_mode,
953 const char *callgraph_buf = NULL;
955 list_for_each_entry(term, config_terms, list) {
956 switch (term->type) {
957 case EVSEL__CONFIG_TERM_PERIOD:
958 if (!(term->weak && opts->user_interval != ULLONG_MAX)) {
959 attr->sample_period = term->val.period;
961 evsel__reset_sample_bit(evsel, PERIOD);
964 case EVSEL__CONFIG_TERM_FREQ:
965 if (!(term->weak && opts->user_freq != UINT_MAX)) {
966 attr->sample_freq = term->val.freq;
968 evsel__set_sample_bit(evsel, PERIOD);
971 case EVSEL__CONFIG_TERM_TIME:
973 evsel__set_sample_bit(evsel, TIME);
975 evsel__reset_sample_bit(evsel, TIME);
977 case EVSEL__CONFIG_TERM_CALLGRAPH:
978 callgraph_buf = term->val.str;
980 case EVSEL__CONFIG_TERM_BRANCH:
981 if (term->val.str && strcmp(term->val.str, "no")) {
982 evsel__set_sample_bit(evsel, BRANCH_STACK);
983 parse_branch_str(term->val.str,
984 &attr->branch_sample_type);
986 evsel__reset_sample_bit(evsel, BRANCH_STACK);
988 case EVSEL__CONFIG_TERM_STACK_USER:
989 dump_size = term->val.stack_user;
991 case EVSEL__CONFIG_TERM_MAX_STACK:
992 max_stack = term->val.max_stack;
994 case EVSEL__CONFIG_TERM_MAX_EVENTS:
995 evsel->max_events = term->val.max_events;
997 case EVSEL__CONFIG_TERM_INHERIT:
999 * attr->inherit should has already been set by
1000 * evsel__config. If user explicitly set
1001 * inherit using config terms, override global
1002 * opt->no_inherit setting.
1004 attr->inherit = term->val.inherit ? 1 : 0;
1006 case EVSEL__CONFIG_TERM_OVERWRITE:
1007 attr->write_backward = term->val.overwrite ? 1 : 0;
1009 case EVSEL__CONFIG_TERM_DRV_CFG:
1011 case EVSEL__CONFIG_TERM_PERCORE:
1013 case EVSEL__CONFIG_TERM_AUX_OUTPUT:
1014 attr->aux_output = term->val.aux_output ? 1 : 0;
1016 case EVSEL__CONFIG_TERM_AUX_SAMPLE_SIZE:
1017 /* Already applied by auxtrace */
1019 case EVSEL__CONFIG_TERM_CFG_CHG:
1026 /* User explicitly set per-event callgraph, clear the old setting and reset. */
1027 if ((callgraph_buf != NULL) || (dump_size > 0) || max_stack) {
1028 bool sample_address = false;
1031 param.max_stack = max_stack;
1032 if (callgraph_buf == NULL)
1033 callgraph_buf = "fp";
1036 /* parse callgraph parameters */
1037 if (callgraph_buf != NULL) {
1038 if (!strcmp(callgraph_buf, "no")) {
1039 param.enabled = false;
1040 param.record_mode = CALLCHAIN_NONE;
1042 param.enabled = true;
1043 if (parse_callchain_record(callgraph_buf, ¶m)) {
1044 pr_err("per-event callgraph setting for %s failed. "
1045 "Apply callgraph global setting for it\n",
1049 if (param.record_mode == CALLCHAIN_DWARF)
1050 sample_address = true;
1053 if (dump_size > 0) {
1054 dump_size = round_up(dump_size, sizeof(u64));
1055 param.dump_size = dump_size;
1058 /* If global callgraph set, clear it */
1059 if (callchain_param.enabled)
1060 evsel__reset_callgraph(evsel, &callchain_param);
1062 /* set perf-event callgraph */
1063 if (param.enabled) {
1064 if (sample_address) {
1065 evsel__set_sample_bit(evsel, ADDR);
1066 evsel__set_sample_bit(evsel, DATA_SRC);
1067 evsel->core.attr.mmap_data = track;
1069 evsel__config_callchain(evsel, opts, ¶m);
1074 struct evsel_config_term *__evsel__get_config_term(struct evsel *evsel, enum evsel_term_type type)
1076 struct evsel_config_term *term, *found_term = NULL;
1078 list_for_each_entry(term, &evsel->config_terms, list) {
1079 if (term->type == type)
1086 void __weak arch_evsel__set_sample_weight(struct evsel *evsel)
1088 evsel__set_sample_bit(evsel, WEIGHT);
1091 void __weak arch_evsel__fixup_new_cycles(struct perf_event_attr *attr __maybe_unused)
1095 static void evsel__set_default_freq_period(struct record_opts *opts,
1096 struct perf_event_attr *attr)
1100 attr->sample_freq = opts->freq;
1102 attr->sample_period = opts->default_interval;
1106 static bool evsel__is_offcpu_event(struct evsel *evsel)
1108 return evsel__is_bpf_output(evsel) && !strcmp(evsel->name, OFFCPU_EVENT);
1112 * The enable_on_exec/disabled value strategy:
1114 * 1) For any type of traced program:
1115 * - all independent events and group leaders are disabled
1116 * - all group members are enabled
1118 * Group members are ruled by group leaders. They need to
1119 * be enabled, because the group scheduling relies on that.
1121 * 2) For traced programs executed by perf:
1122 * - all independent events and group leaders have
1123 * enable_on_exec set
1124 * - we don't specifically enable or disable any event during
1125 * the record command
1127 * Independent events and group leaders are initially disabled
1128 * and get enabled by exec. Group members are ruled by group
1129 * leaders as stated in 1).
1131 * 3) For traced programs attached by perf (pid/tid):
1132 * - we specifically enable or disable all events during
1133 * the record command
1135 * When attaching events to already running traced we
1136 * enable/disable events specifically, as there's no
1137 * initial traced exec call.
1139 void evsel__config(struct evsel *evsel, struct record_opts *opts,
1140 struct callchain_param *callchain)
1142 struct evsel *leader = evsel__leader(evsel);
1143 struct perf_event_attr *attr = &evsel->core.attr;
1144 int track = evsel->tracking;
1145 bool per_cpu = opts->target.default_per_cpu && !opts->target.per_thread;
1147 attr->sample_id_all = perf_missing_features.sample_id_all ? 0 : 1;
1148 attr->inherit = !opts->no_inherit;
1149 attr->write_backward = opts->overwrite ? 1 : 0;
1151 evsel__set_sample_bit(evsel, IP);
1152 evsel__set_sample_bit(evsel, TID);
1154 if (evsel->sample_read) {
1155 evsel__set_sample_bit(evsel, READ);
1158 * We need ID even in case of single event, because
1159 * PERF_SAMPLE_READ process ID specific data.
1161 evsel__set_sample_id(evsel, false);
1164 * Apply group format only if we belong to group
1165 * with more than one members.
1167 if (leader->core.nr_members > 1) {
1168 attr->read_format |= PERF_FORMAT_GROUP;
1174 * We default some events to have a default interval. But keep
1175 * it a weak assumption overridable by the user.
1177 if ((evsel->is_libpfm_event && !attr->sample_period) ||
1178 (!evsel->is_libpfm_event && (!attr->sample_period ||
1179 opts->user_freq != UINT_MAX ||
1180 opts->user_interval != ULLONG_MAX)))
1181 evsel__set_default_freq_period(opts, attr);
1184 * If attr->freq was set (here or earlier), ask for period
1188 evsel__set_sample_bit(evsel, PERIOD);
1190 if (opts->no_samples)
1191 attr->sample_freq = 0;
1193 if (opts->inherit_stat) {
1194 evsel->core.attr.read_format |=
1195 PERF_FORMAT_TOTAL_TIME_ENABLED |
1196 PERF_FORMAT_TOTAL_TIME_RUNNING |
1198 attr->inherit_stat = 1;
1201 if (opts->sample_address) {
1202 evsel__set_sample_bit(evsel, ADDR);
1203 attr->mmap_data = track;
1207 * We don't allow user space callchains for function trace
1208 * event, due to issues with page faults while tracing page
1209 * fault handler and its overall trickiness nature.
1211 if (evsel__is_function_event(evsel))
1212 evsel->core.attr.exclude_callchain_user = 1;
1214 if (callchain && callchain->enabled && !evsel->no_aux_samples)
1215 evsel__config_callchain(evsel, opts, callchain);
1217 if (opts->sample_intr_regs && !evsel->no_aux_samples &&
1218 !evsel__is_dummy_event(evsel)) {
1219 attr->sample_regs_intr = opts->sample_intr_regs;
1220 evsel__set_sample_bit(evsel, REGS_INTR);
1223 if (opts->sample_user_regs && !evsel->no_aux_samples &&
1224 !evsel__is_dummy_event(evsel)) {
1225 attr->sample_regs_user |= opts->sample_user_regs;
1226 evsel__set_sample_bit(evsel, REGS_USER);
1229 if (target__has_cpu(&opts->target) || opts->sample_cpu)
1230 evsel__set_sample_bit(evsel, CPU);
1233 * When the user explicitly disabled time don't force it here.
1235 if (opts->sample_time &&
1236 (!perf_missing_features.sample_id_all &&
1237 (!opts->no_inherit || target__has_cpu(&opts->target) || per_cpu ||
1238 opts->sample_time_set)))
1239 evsel__set_sample_bit(evsel, TIME);
1241 if (opts->raw_samples && !evsel->no_aux_samples) {
1242 evsel__set_sample_bit(evsel, TIME);
1243 evsel__set_sample_bit(evsel, RAW);
1244 evsel__set_sample_bit(evsel, CPU);
1247 if (opts->sample_address)
1248 evsel__set_sample_bit(evsel, DATA_SRC);
1250 if (opts->sample_phys_addr)
1251 evsel__set_sample_bit(evsel, PHYS_ADDR);
1253 if (opts->no_buffering) {
1254 attr->watermark = 0;
1255 attr->wakeup_events = 1;
1257 if (opts->branch_stack && !evsel->no_aux_samples) {
1258 evsel__set_sample_bit(evsel, BRANCH_STACK);
1259 attr->branch_sample_type = opts->branch_stack;
1262 if (opts->sample_weight)
1263 arch_evsel__set_sample_weight(evsel);
1267 attr->mmap2 = track && !perf_missing_features.mmap2;
1269 attr->build_id = track && opts->build_id;
1272 * ksymbol is tracked separately with text poke because it needs to be
1273 * system wide and enabled immediately.
1275 if (!opts->text_poke)
1276 attr->ksymbol = track && !perf_missing_features.ksymbol;
1277 attr->bpf_event = track && !opts->no_bpf_event && !perf_missing_features.bpf;
1279 if (opts->record_namespaces)
1280 attr->namespaces = track;
1282 if (opts->record_cgroup) {
1283 attr->cgroup = track && !perf_missing_features.cgroup;
1284 evsel__set_sample_bit(evsel, CGROUP);
1287 if (opts->sample_data_page_size)
1288 evsel__set_sample_bit(evsel, DATA_PAGE_SIZE);
1290 if (opts->sample_code_page_size)
1291 evsel__set_sample_bit(evsel, CODE_PAGE_SIZE);
1293 if (opts->record_switch_events)
1294 attr->context_switch = track;
1296 if (opts->sample_transaction)
1297 evsel__set_sample_bit(evsel, TRANSACTION);
1299 if (opts->running_time) {
1300 evsel->core.attr.read_format |=
1301 PERF_FORMAT_TOTAL_TIME_ENABLED |
1302 PERF_FORMAT_TOTAL_TIME_RUNNING;
1306 * XXX see the function comment above
1308 * Disabling only independent events or group leaders,
1309 * keeping group members enabled.
1311 if (evsel__is_group_leader(evsel))
1315 * Setting enable_on_exec for independent events and
1316 * group leaders for traced executed by perf.
1318 if (target__none(&opts->target) && evsel__is_group_leader(evsel) &&
1319 !opts->initial_delay)
1320 attr->enable_on_exec = 1;
1322 if (evsel->immediate) {
1324 attr->enable_on_exec = 0;
1327 clockid = opts->clockid;
1328 if (opts->use_clockid) {
1329 attr->use_clockid = 1;
1330 attr->clockid = opts->clockid;
1333 if (evsel->precise_max)
1334 attr->precise_ip = 3;
1336 if (opts->all_user) {
1337 attr->exclude_kernel = 1;
1338 attr->exclude_user = 0;
1341 if (opts->all_kernel) {
1342 attr->exclude_kernel = 0;
1343 attr->exclude_user = 1;
1346 if (evsel->core.own_cpus || evsel->unit)
1347 evsel->core.attr.read_format |= PERF_FORMAT_ID;
1350 * Apply event specific term settings,
1351 * it overloads any global configuration.
1353 evsel__apply_config_terms(evsel, opts, track);
1355 evsel->ignore_missing_thread = opts->ignore_missing_thread;
1357 /* The --period option takes the precedence. */
1358 if (opts->period_set) {
1360 evsel__set_sample_bit(evsel, PERIOD);
1362 evsel__reset_sample_bit(evsel, PERIOD);
1366 * A dummy event never triggers any actual counter and therefore
1367 * cannot be used with branch_stack.
1369 * For initial_delay, a dummy event is added implicitly.
1370 * The software event will trigger -EOPNOTSUPP error out,
1371 * if BRANCH_STACK bit is set.
1373 if (evsel__is_dummy_event(evsel))
1374 evsel__reset_sample_bit(evsel, BRANCH_STACK);
1376 if (evsel__is_offcpu_event(evsel))
1377 evsel->core.attr.sample_type &= OFFCPU_SAMPLE_TYPES;
1380 int evsel__set_filter(struct evsel *evsel, const char *filter)
1382 char *new_filter = strdup(filter);
1384 if (new_filter != NULL) {
1385 free(evsel->filter);
1386 evsel->filter = new_filter;
1393 static int evsel__append_filter(struct evsel *evsel, const char *fmt, const char *filter)
1397 if (evsel->filter == NULL)
1398 return evsel__set_filter(evsel, filter);
1400 if (asprintf(&new_filter, fmt, evsel->filter, filter) > 0) {
1401 free(evsel->filter);
1402 evsel->filter = new_filter;
1409 int evsel__append_tp_filter(struct evsel *evsel, const char *filter)
1411 return evsel__append_filter(evsel, "(%s) && (%s)", filter);
1414 int evsel__append_addr_filter(struct evsel *evsel, const char *filter)
1416 return evsel__append_filter(evsel, "%s,%s", filter);
1419 /* Caller has to clear disabled after going through all CPUs. */
1420 int evsel__enable_cpu(struct evsel *evsel, int cpu_map_idx)
1422 return perf_evsel__enable_cpu(&evsel->core, cpu_map_idx);
1425 int evsel__enable(struct evsel *evsel)
1427 int err = perf_evsel__enable(&evsel->core);
1430 evsel->disabled = false;
1434 /* Caller has to set disabled after going through all CPUs. */
1435 int evsel__disable_cpu(struct evsel *evsel, int cpu_map_idx)
1437 return perf_evsel__disable_cpu(&evsel->core, cpu_map_idx);
1440 int evsel__disable(struct evsel *evsel)
1442 int err = perf_evsel__disable(&evsel->core);
1444 * We mark it disabled here so that tools that disable a event can
1445 * ignore events after they disable it. I.e. the ring buffer may have
1446 * already a few more events queued up before the kernel got the stop
1450 evsel->disabled = true;
1455 void free_config_terms(struct list_head *config_terms)
1457 struct evsel_config_term *term, *h;
1459 list_for_each_entry_safe(term, h, config_terms, list) {
1460 list_del_init(&term->list);
1462 zfree(&term->val.str);
1467 static void evsel__free_config_terms(struct evsel *evsel)
1469 free_config_terms(&evsel->config_terms);
1472 void evsel__exit(struct evsel *evsel)
1474 assert(list_empty(&evsel->core.node));
1475 assert(evsel->evlist == NULL);
1476 bpf_counter__destroy(evsel);
1477 evsel__free_counts(evsel);
1478 perf_evsel__free_fd(&evsel->core);
1479 perf_evsel__free_id(&evsel->core);
1480 evsel__free_config_terms(evsel);
1481 cgroup__put(evsel->cgrp);
1482 perf_cpu_map__put(evsel->core.cpus);
1483 perf_cpu_map__put(evsel->core.own_cpus);
1484 perf_thread_map__put(evsel->core.threads);
1485 zfree(&evsel->group_name);
1486 zfree(&evsel->name);
1487 zfree(&evsel->pmu_name);
1488 zfree(&evsel->unit);
1489 zfree(&evsel->metric_id);
1490 evsel__zero_per_pkg(evsel);
1491 hashmap__free(evsel->per_pkg_mask);
1492 evsel->per_pkg_mask = NULL;
1493 zfree(&evsel->metric_events);
1494 perf_evsel__object.fini(evsel);
1497 void evsel__delete(struct evsel *evsel)
1503 void evsel__compute_deltas(struct evsel *evsel, int cpu_map_idx, int thread,
1504 struct perf_counts_values *count)
1506 struct perf_counts_values tmp;
1508 if (!evsel->prev_raw_counts)
1511 if (cpu_map_idx == -1) {
1512 tmp = evsel->prev_raw_counts->aggr;
1513 evsel->prev_raw_counts->aggr = *count;
1515 tmp = *perf_counts(evsel->prev_raw_counts, cpu_map_idx, thread);
1516 *perf_counts(evsel->prev_raw_counts, cpu_map_idx, thread) = *count;
1519 count->val = count->val - tmp.val;
1520 count->ena = count->ena - tmp.ena;
1521 count->run = count->run - tmp.run;
1524 static int evsel__read_one(struct evsel *evsel, int cpu_map_idx, int thread)
1526 struct perf_counts_values *count = perf_counts(evsel->counts, cpu_map_idx, thread);
1528 return perf_evsel__read(&evsel->core, cpu_map_idx, thread, count);
1531 static void evsel__set_count(struct evsel *counter, int cpu_map_idx, int thread,
1532 u64 val, u64 ena, u64 run)
1534 struct perf_counts_values *count;
1536 count = perf_counts(counter->counts, cpu_map_idx, thread);
1542 perf_counts__set_loaded(counter->counts, cpu_map_idx, thread, true);
1545 static int evsel__process_group_data(struct evsel *leader, int cpu_map_idx, int thread, u64 *data)
1547 u64 read_format = leader->core.attr.read_format;
1548 struct sample_read_value *v;
1549 u64 nr, ena = 0, run = 0, i;
1553 if (nr != (u64) leader->core.nr_members)
1556 if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED)
1559 if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING)
1562 v = (struct sample_read_value *) data;
1564 evsel__set_count(leader, cpu_map_idx, thread, v[0].value, ena, run);
1566 for (i = 1; i < nr; i++) {
1567 struct evsel *counter;
1569 counter = evlist__id2evsel(leader->evlist, v[i].id);
1573 evsel__set_count(counter, cpu_map_idx, thread, v[i].value, ena, run);
1579 static int evsel__read_group(struct evsel *leader, int cpu_map_idx, int thread)
1581 struct perf_stat_evsel *ps = leader->stats;
1582 u64 read_format = leader->core.attr.read_format;
1583 int size = perf_evsel__read_size(&leader->core);
1584 u64 *data = ps->group_data;
1586 if (!(read_format & PERF_FORMAT_ID))
1589 if (!evsel__is_group_leader(leader))
1593 data = zalloc(size);
1597 ps->group_data = data;
1600 if (FD(leader, cpu_map_idx, thread) < 0)
1603 if (readn(FD(leader, cpu_map_idx, thread), data, size) <= 0)
1606 return evsel__process_group_data(leader, cpu_map_idx, thread, data);
1609 int evsel__read_counter(struct evsel *evsel, int cpu_map_idx, int thread)
1611 u64 read_format = evsel->core.attr.read_format;
1613 if (read_format & PERF_FORMAT_GROUP)
1614 return evsel__read_group(evsel, cpu_map_idx, thread);
1616 return evsel__read_one(evsel, cpu_map_idx, thread);
1619 int __evsel__read_on_cpu(struct evsel *evsel, int cpu_map_idx, int thread, bool scale)
1621 struct perf_counts_values count;
1622 size_t nv = scale ? 3 : 1;
1624 if (FD(evsel, cpu_map_idx, thread) < 0)
1627 if (evsel->counts == NULL && evsel__alloc_counts(evsel) < 0)
1630 if (readn(FD(evsel, cpu_map_idx, thread), &count, nv * sizeof(u64)) <= 0)
1633 evsel__compute_deltas(evsel, cpu_map_idx, thread, &count);
1634 perf_counts_values__scale(&count, scale, NULL);
1635 *perf_counts(evsel->counts, cpu_map_idx, thread) = count;
1639 static int evsel__match_other_cpu(struct evsel *evsel, struct evsel *other,
1642 struct perf_cpu cpu;
1644 cpu = perf_cpu_map__cpu(evsel->core.cpus, cpu_map_idx);
1645 return perf_cpu_map__idx(other->core.cpus, cpu);
1648 static int evsel__hybrid_group_cpu_map_idx(struct evsel *evsel, int cpu_map_idx)
1650 struct evsel *leader = evsel__leader(evsel);
1652 if ((evsel__is_hybrid(evsel) && !evsel__is_hybrid(leader)) ||
1653 (!evsel__is_hybrid(evsel) && evsel__is_hybrid(leader))) {
1654 return evsel__match_other_cpu(evsel, leader, cpu_map_idx);
1660 static int get_group_fd(struct evsel *evsel, int cpu_map_idx, int thread)
1662 struct evsel *leader = evsel__leader(evsel);
1665 if (evsel__is_group_leader(evsel))
1669 * Leader must be already processed/open,
1670 * if not it's a bug.
1672 BUG_ON(!leader->core.fd);
1674 cpu_map_idx = evsel__hybrid_group_cpu_map_idx(evsel, cpu_map_idx);
1675 if (cpu_map_idx == -1)
1678 fd = FD(leader, cpu_map_idx, thread);
1684 static void evsel__remove_fd(struct evsel *pos, int nr_cpus, int nr_threads, int thread_idx)
1686 for (int cpu = 0; cpu < nr_cpus; cpu++)
1687 for (int thread = thread_idx; thread < nr_threads - 1; thread++)
1688 FD(pos, cpu, thread) = FD(pos, cpu, thread + 1);
1691 static int update_fds(struct evsel *evsel,
1692 int nr_cpus, int cpu_map_idx,
1693 int nr_threads, int thread_idx)
1697 if (cpu_map_idx >= nr_cpus || thread_idx >= nr_threads)
1700 evlist__for_each_entry(evsel->evlist, pos) {
1701 nr_cpus = pos != evsel ? nr_cpus : cpu_map_idx;
1703 evsel__remove_fd(pos, nr_cpus, nr_threads, thread_idx);
1706 * Since fds for next evsel has not been created,
1707 * there is no need to iterate whole event list.
1715 static bool evsel__ignore_missing_thread(struct evsel *evsel,
1716 int nr_cpus, int cpu_map_idx,
1717 struct perf_thread_map *threads,
1718 int thread, int err)
1720 pid_t ignore_pid = perf_thread_map__pid(threads, thread);
1722 if (!evsel->ignore_missing_thread)
1725 /* The system wide setup does not work with threads. */
1726 if (evsel->core.system_wide)
1729 /* The -ESRCH is perf event syscall errno for pid's not found. */
1733 /* If there's only one thread, let it fail. */
1734 if (threads->nr == 1)
1738 * We should remove fd for missing_thread first
1739 * because thread_map__remove() will decrease threads->nr.
1741 if (update_fds(evsel, nr_cpus, cpu_map_idx, threads->nr, thread))
1744 if (thread_map__remove(threads, thread))
1747 pr_warning("WARNING: Ignored open failure for pid %d\n",
1752 static int __open_attr__fprintf(FILE *fp, const char *name, const char *val,
1753 void *priv __maybe_unused)
1755 return fprintf(fp, " %-32s %s\n", name, val);
1758 static void display_attr(struct perf_event_attr *attr)
1760 if (verbose >= 2 || debug_peo_args) {
1761 fprintf(stderr, "%.60s\n", graph_dotted_line);
1762 fprintf(stderr, "perf_event_attr:\n");
1763 perf_event_attr__fprintf(stderr, attr, __open_attr__fprintf, NULL);
1764 fprintf(stderr, "%.60s\n", graph_dotted_line);
1768 bool evsel__precise_ip_fallback(struct evsel *evsel)
1770 /* Do not try less precise if not requested. */
1771 if (!evsel->precise_max)
1775 * We tried all the precise_ip values, and it's
1776 * still failing, so leave it to standard fallback.
1778 if (!evsel->core.attr.precise_ip) {
1779 evsel->core.attr.precise_ip = evsel->precise_ip_original;
1783 if (!evsel->precise_ip_original)
1784 evsel->precise_ip_original = evsel->core.attr.precise_ip;
1786 evsel->core.attr.precise_ip--;
1787 pr_debug2_peo("decreasing precise_ip by one (%d)\n", evsel->core.attr.precise_ip);
1788 display_attr(&evsel->core.attr);
1792 static struct perf_cpu_map *empty_cpu_map;
1793 static struct perf_thread_map *empty_thread_map;
1795 static int __evsel__prepare_open(struct evsel *evsel, struct perf_cpu_map *cpus,
1796 struct perf_thread_map *threads)
1800 if ((perf_missing_features.write_backward && evsel->core.attr.write_backward) ||
1801 (perf_missing_features.aux_output && evsel->core.attr.aux_output))
1805 if (empty_cpu_map == NULL) {
1806 empty_cpu_map = perf_cpu_map__dummy_new();
1807 if (empty_cpu_map == NULL)
1811 cpus = empty_cpu_map;
1814 if (threads == NULL) {
1815 if (empty_thread_map == NULL) {
1816 empty_thread_map = thread_map__new_by_tid(-1);
1817 if (empty_thread_map == NULL)
1821 threads = empty_thread_map;
1824 if (evsel->core.system_wide)
1827 nthreads = threads->nr;
1829 if (evsel->core.fd == NULL &&
1830 perf_evsel__alloc_fd(&evsel->core, perf_cpu_map__nr(cpus), nthreads) < 0)
1833 evsel->open_flags = PERF_FLAG_FD_CLOEXEC;
1835 evsel->open_flags |= PERF_FLAG_PID_CGROUP;
1840 static void evsel__disable_missing_features(struct evsel *evsel)
1842 if (perf_missing_features.weight_struct) {
1843 evsel__set_sample_bit(evsel, WEIGHT);
1844 evsel__reset_sample_bit(evsel, WEIGHT_STRUCT);
1846 if (perf_missing_features.clockid_wrong)
1847 evsel->core.attr.clockid = CLOCK_MONOTONIC; /* should always work */
1848 if (perf_missing_features.clockid) {
1849 evsel->core.attr.use_clockid = 0;
1850 evsel->core.attr.clockid = 0;
1852 if (perf_missing_features.cloexec)
1853 evsel->open_flags &= ~(unsigned long)PERF_FLAG_FD_CLOEXEC;
1854 if (perf_missing_features.mmap2)
1855 evsel->core.attr.mmap2 = 0;
1856 if (evsel->pmu && evsel->pmu->missing_features.exclude_guest)
1857 evsel->core.attr.exclude_guest = evsel->core.attr.exclude_host = 0;
1858 if (perf_missing_features.lbr_flags)
1859 evsel->core.attr.branch_sample_type &= ~(PERF_SAMPLE_BRANCH_NO_FLAGS |
1860 PERF_SAMPLE_BRANCH_NO_CYCLES);
1861 if (perf_missing_features.group_read && evsel->core.attr.inherit)
1862 evsel->core.attr.read_format &= ~(PERF_FORMAT_GROUP|PERF_FORMAT_ID);
1863 if (perf_missing_features.ksymbol)
1864 evsel->core.attr.ksymbol = 0;
1865 if (perf_missing_features.bpf)
1866 evsel->core.attr.bpf_event = 0;
1867 if (perf_missing_features.branch_hw_idx)
1868 evsel->core.attr.branch_sample_type &= ~PERF_SAMPLE_BRANCH_HW_INDEX;
1869 if (perf_missing_features.sample_id_all)
1870 evsel->core.attr.sample_id_all = 0;
1873 int evsel__prepare_open(struct evsel *evsel, struct perf_cpu_map *cpus,
1874 struct perf_thread_map *threads)
1878 err = __evsel__prepare_open(evsel, cpus, threads);
1882 evsel__disable_missing_features(evsel);
1887 bool evsel__detect_missing_features(struct evsel *evsel)
1890 * Must probe features in the order they were added to the
1891 * perf_event_attr interface.
1893 if (!perf_missing_features.weight_struct &&
1894 (evsel->core.attr.sample_type & PERF_SAMPLE_WEIGHT_STRUCT)) {
1895 perf_missing_features.weight_struct = true;
1896 pr_debug2("switching off weight struct support\n");
1898 } else if (!perf_missing_features.code_page_size &&
1899 (evsel->core.attr.sample_type & PERF_SAMPLE_CODE_PAGE_SIZE)) {
1900 perf_missing_features.code_page_size = true;
1901 pr_debug2_peo("Kernel has no PERF_SAMPLE_CODE_PAGE_SIZE support, bailing out\n");
1903 } else if (!perf_missing_features.data_page_size &&
1904 (evsel->core.attr.sample_type & PERF_SAMPLE_DATA_PAGE_SIZE)) {
1905 perf_missing_features.data_page_size = true;
1906 pr_debug2_peo("Kernel has no PERF_SAMPLE_DATA_PAGE_SIZE support, bailing out\n");
1908 } else if (!perf_missing_features.cgroup && evsel->core.attr.cgroup) {
1909 perf_missing_features.cgroup = true;
1910 pr_debug2_peo("Kernel has no cgroup sampling support, bailing out\n");
1912 } else if (!perf_missing_features.branch_hw_idx &&
1913 (evsel->core.attr.branch_sample_type & PERF_SAMPLE_BRANCH_HW_INDEX)) {
1914 perf_missing_features.branch_hw_idx = true;
1915 pr_debug2("switching off branch HW index support\n");
1917 } else if (!perf_missing_features.aux_output && evsel->core.attr.aux_output) {
1918 perf_missing_features.aux_output = true;
1919 pr_debug2_peo("Kernel has no attr.aux_output support, bailing out\n");
1921 } else if (!perf_missing_features.bpf && evsel->core.attr.bpf_event) {
1922 perf_missing_features.bpf = true;
1923 pr_debug2_peo("switching off bpf_event\n");
1925 } else if (!perf_missing_features.ksymbol && evsel->core.attr.ksymbol) {
1926 perf_missing_features.ksymbol = true;
1927 pr_debug2_peo("switching off ksymbol\n");
1929 } else if (!perf_missing_features.write_backward && evsel->core.attr.write_backward) {
1930 perf_missing_features.write_backward = true;
1931 pr_debug2_peo("switching off write_backward\n");
1933 } else if (!perf_missing_features.clockid_wrong && evsel->core.attr.use_clockid) {
1934 perf_missing_features.clockid_wrong = true;
1935 pr_debug2_peo("switching off clockid\n");
1937 } else if (!perf_missing_features.clockid && evsel->core.attr.use_clockid) {
1938 perf_missing_features.clockid = true;
1939 pr_debug2_peo("switching off use_clockid\n");
1941 } else if (!perf_missing_features.cloexec && (evsel->open_flags & PERF_FLAG_FD_CLOEXEC)) {
1942 perf_missing_features.cloexec = true;
1943 pr_debug2_peo("switching off cloexec flag\n");
1945 } else if (!perf_missing_features.mmap2 && evsel->core.attr.mmap2) {
1946 perf_missing_features.mmap2 = true;
1947 pr_debug2_peo("switching off mmap2\n");
1949 } else if ((evsel->core.attr.exclude_guest || evsel->core.attr.exclude_host) &&
1950 (evsel->pmu == NULL || evsel->pmu->missing_features.exclude_guest)) {
1951 if (evsel->pmu == NULL) {
1952 evsel->pmu = evsel__find_pmu(evsel);
1954 evsel->pmu->missing_features.exclude_guest = true;
1956 /* we cannot find PMU, disable attrs now */
1957 evsel->core.attr.exclude_host = false;
1958 evsel->core.attr.exclude_guest = false;
1962 if (evsel->exclude_GH) {
1963 pr_debug2_peo("PMU has no exclude_host/guest support, bailing out\n");
1966 if (!perf_missing_features.exclude_guest) {
1967 perf_missing_features.exclude_guest = true;
1968 pr_debug2_peo("switching off exclude_guest, exclude_host\n");
1971 } else if (!perf_missing_features.sample_id_all) {
1972 perf_missing_features.sample_id_all = true;
1973 pr_debug2_peo("switching off sample_id_all\n");
1975 } else if (!perf_missing_features.lbr_flags &&
1976 (evsel->core.attr.branch_sample_type &
1977 (PERF_SAMPLE_BRANCH_NO_CYCLES |
1978 PERF_SAMPLE_BRANCH_NO_FLAGS))) {
1979 perf_missing_features.lbr_flags = true;
1980 pr_debug2_peo("switching off branch sample type no (cycles/flags)\n");
1982 } else if (!perf_missing_features.group_read &&
1983 evsel->core.attr.inherit &&
1984 (evsel->core.attr.read_format & PERF_FORMAT_GROUP) &&
1985 evsel__is_group_leader(evsel)) {
1986 perf_missing_features.group_read = true;
1987 pr_debug2_peo("switching off group read\n");
1994 bool evsel__increase_rlimit(enum rlimit_action *set_rlimit)
1999 if (*set_rlimit < INCREASED_MAX) {
2002 if (getrlimit(RLIMIT_NOFILE, &l) == 0) {
2003 if (*set_rlimit == NO_CHANGE) {
2004 l.rlim_cur = l.rlim_max;
2006 l.rlim_cur = l.rlim_max + 1000;
2007 l.rlim_max = l.rlim_cur;
2009 if (setrlimit(RLIMIT_NOFILE, &l) == 0) {
2021 static int evsel__open_cpu(struct evsel *evsel, struct perf_cpu_map *cpus,
2022 struct perf_thread_map *threads,
2023 int start_cpu_map_idx, int end_cpu_map_idx)
2025 int idx, thread, nthreads;
2026 int pid = -1, err, old_errno;
2027 enum rlimit_action set_rlimit = NO_CHANGE;
2029 err = __evsel__prepare_open(evsel, cpus, threads);
2034 cpus = empty_cpu_map;
2036 if (threads == NULL)
2037 threads = empty_thread_map;
2039 if (evsel->core.system_wide)
2042 nthreads = threads->nr;
2045 pid = evsel->cgrp->fd;
2047 fallback_missing_features:
2048 evsel__disable_missing_features(evsel);
2050 display_attr(&evsel->core.attr);
2052 for (idx = start_cpu_map_idx; idx < end_cpu_map_idx; idx++) {
2054 for (thread = 0; thread < nthreads; thread++) {
2057 if (thread >= nthreads)
2060 if (!evsel->cgrp && !evsel->core.system_wide)
2061 pid = perf_thread_map__pid(threads, thread);
2063 group_fd = get_group_fd(evsel, idx, thread);
2067 pr_debug2_peo("sys_perf_event_open: pid %d cpu %d group_fd %d flags %#lx",
2068 pid, perf_cpu_map__cpu(cpus, idx).cpu, group_fd, evsel->open_flags);
2070 fd = sys_perf_event_open(&evsel->core.attr, pid,
2071 perf_cpu_map__cpu(cpus, idx).cpu,
2072 group_fd, evsel->open_flags);
2074 FD(evsel, idx, thread) = fd;
2079 pr_debug2_peo("\nsys_perf_event_open failed, error %d\n",
2084 bpf_counter__install_pe(evsel, idx, fd);
2086 if (unlikely(test_attr__enabled)) {
2087 test_attr__open(&evsel->core.attr, pid,
2088 perf_cpu_map__cpu(cpus, idx),
2089 fd, group_fd, evsel->open_flags);
2092 pr_debug2_peo(" = %d\n", fd);
2094 if (evsel->bpf_fd >= 0) {
2096 int bpf_fd = evsel->bpf_fd;
2099 PERF_EVENT_IOC_SET_BPF,
2101 if (err && errno != EEXIST) {
2102 pr_err("failed to attach bpf fd %d: %s\n",
2103 bpf_fd, strerror(errno));
2109 set_rlimit = NO_CHANGE;
2112 * If we succeeded but had to kill clockid, fail and
2113 * have evsel__open_strerror() print us a nice error.
2115 if (perf_missing_features.clockid ||
2116 perf_missing_features.clockid_wrong) {
2126 if (evsel__precise_ip_fallback(evsel))
2129 if (evsel__ignore_missing_thread(evsel, perf_cpu_map__nr(cpus),
2130 idx, threads, thread, err)) {
2131 /* We just removed 1 thread, so lower the upper nthreads limit. */
2134 /* ... and pretend like nothing have happened. */
2139 * perf stat needs between 5 and 22 fds per CPU. When we run out
2140 * of them try to increase the limits.
2142 if (err == -EMFILE && evsel__increase_rlimit(&set_rlimit))
2145 if (err != -EINVAL || idx > 0 || thread > 0)
2148 if (evsel__detect_missing_features(evsel))
2149 goto fallback_missing_features;
2152 threads->err_thread = thread;
2156 while (--thread >= 0) {
2157 if (FD(evsel, idx, thread) >= 0)
2158 close(FD(evsel, idx, thread));
2159 FD(evsel, idx, thread) = -1;
2162 } while (--idx >= 0);
2167 int evsel__open(struct evsel *evsel, struct perf_cpu_map *cpus,
2168 struct perf_thread_map *threads)
2170 return evsel__open_cpu(evsel, cpus, threads, 0, perf_cpu_map__nr(cpus));
2173 void evsel__close(struct evsel *evsel)
2175 perf_evsel__close(&evsel->core);
2176 perf_evsel__free_id(&evsel->core);
2179 int evsel__open_per_cpu(struct evsel *evsel, struct perf_cpu_map *cpus, int cpu_map_idx)
2181 if (cpu_map_idx == -1)
2182 return evsel__open_cpu(evsel, cpus, NULL, 0, perf_cpu_map__nr(cpus));
2184 return evsel__open_cpu(evsel, cpus, NULL, cpu_map_idx, cpu_map_idx + 1);
2187 int evsel__open_per_thread(struct evsel *evsel, struct perf_thread_map *threads)
2189 return evsel__open(evsel, NULL, threads);
2192 static int perf_evsel__parse_id_sample(const struct evsel *evsel,
2193 const union perf_event *event,
2194 struct perf_sample *sample)
2196 u64 type = evsel->core.attr.sample_type;
2197 const __u64 *array = event->sample.array;
2198 bool swapped = evsel->needs_swap;
2201 array += ((event->header.size -
2202 sizeof(event->header)) / sizeof(u64)) - 1;
2204 if (type & PERF_SAMPLE_IDENTIFIER) {
2205 sample->id = *array;
2209 if (type & PERF_SAMPLE_CPU) {
2212 /* undo swap of u64, then swap on individual u32s */
2213 u.val64 = bswap_64(u.val64);
2214 u.val32[0] = bswap_32(u.val32[0]);
2217 sample->cpu = u.val32[0];
2221 if (type & PERF_SAMPLE_STREAM_ID) {
2222 sample->stream_id = *array;
2226 if (type & PERF_SAMPLE_ID) {
2227 sample->id = *array;
2231 if (type & PERF_SAMPLE_TIME) {
2232 sample->time = *array;
2236 if (type & PERF_SAMPLE_TID) {
2239 /* undo swap of u64, then swap on individual u32s */
2240 u.val64 = bswap_64(u.val64);
2241 u.val32[0] = bswap_32(u.val32[0]);
2242 u.val32[1] = bswap_32(u.val32[1]);
2245 sample->pid = u.val32[0];
2246 sample->tid = u.val32[1];
2253 static inline bool overflow(const void *endp, u16 max_size, const void *offset,
2256 return size > max_size || offset + size > endp;
2259 #define OVERFLOW_CHECK(offset, size, max_size) \
2261 if (overflow(endp, (max_size), (offset), (size))) \
2265 #define OVERFLOW_CHECK_u64(offset) \
2266 OVERFLOW_CHECK(offset, sizeof(u64), sizeof(u64))
2269 perf_event__check_size(union perf_event *event, unsigned int sample_size)
2272 * The evsel's sample_size is based on PERF_SAMPLE_MASK which includes
2273 * up to PERF_SAMPLE_PERIOD. After that overflow() must be used to
2274 * check the format does not go past the end of the event.
2276 if (sample_size + sizeof(event->header) > event->header.size)
2282 void __weak arch_perf_parse_sample_weight(struct perf_sample *data,
2284 u64 type __maybe_unused)
2286 data->weight = *array;
2289 u64 evsel__bitfield_swap_branch_flags(u64 value)
2298 * mispred:1 //target mispredicted
2299 * predicted:1 //target predicted
2300 * in_tx:1 //in transaction
2301 * abort:1 //transaction abort
2302 * cycles:16 //cycle count to last branch
2303 * type:4 //branch type
2308 * Avoid bswap64() the entire branch_flag.value,
2309 * as it has variable bit-field sizes. Instead the
2310 * macro takes the bit-field position/size,
2311 * swaps it based on the host endianness.
2313 * tep_is_bigendian() is used here instead of
2314 * bigendian() to avoid python test fails.
2316 if (tep_is_bigendian()) {
2317 new_val = bitfield_swap(value, 0, 1);
2318 new_val |= bitfield_swap(value, 1, 1);
2319 new_val |= bitfield_swap(value, 2, 1);
2320 new_val |= bitfield_swap(value, 3, 1);
2321 new_val |= bitfield_swap(value, 4, 16);
2322 new_val |= bitfield_swap(value, 20, 4);
2323 new_val |= bitfield_swap(value, 24, 40);
2325 new_val = bitfield_swap(value, 63, 1);
2326 new_val |= bitfield_swap(value, 62, 1);
2327 new_val |= bitfield_swap(value, 61, 1);
2328 new_val |= bitfield_swap(value, 60, 1);
2329 new_val |= bitfield_swap(value, 44, 16);
2330 new_val |= bitfield_swap(value, 40, 4);
2331 new_val |= bitfield_swap(value, 0, 40);
2337 int evsel__parse_sample(struct evsel *evsel, union perf_event *event,
2338 struct perf_sample *data)
2340 u64 type = evsel->core.attr.sample_type;
2341 bool swapped = evsel->needs_swap;
2343 u16 max_size = event->header.size;
2344 const void *endp = (void *)event + max_size;
2348 * used for cross-endian analysis. See git commit 65014ab3
2349 * for why this goofiness is needed.
2353 memset(data, 0, sizeof(*data));
2354 data->cpu = data->pid = data->tid = -1;
2355 data->stream_id = data->id = data->time = -1ULL;
2356 data->period = evsel->core.attr.sample_period;
2357 data->cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK;
2358 data->misc = event->header.misc;
2360 data->data_src = PERF_MEM_DATA_SRC_NONE;
2362 if (event->header.type != PERF_RECORD_SAMPLE) {
2363 if (!evsel->core.attr.sample_id_all)
2365 return perf_evsel__parse_id_sample(evsel, event, data);
2368 array = event->sample.array;
2370 if (perf_event__check_size(event, evsel->sample_size))
2373 if (type & PERF_SAMPLE_IDENTIFIER) {
2378 if (type & PERF_SAMPLE_IP) {
2383 if (type & PERF_SAMPLE_TID) {
2386 /* undo swap of u64, then swap on individual u32s */
2387 u.val64 = bswap_64(u.val64);
2388 u.val32[0] = bswap_32(u.val32[0]);
2389 u.val32[1] = bswap_32(u.val32[1]);
2392 data->pid = u.val32[0];
2393 data->tid = u.val32[1];
2397 if (type & PERF_SAMPLE_TIME) {
2398 data->time = *array;
2402 if (type & PERF_SAMPLE_ADDR) {
2403 data->addr = *array;
2407 if (type & PERF_SAMPLE_ID) {
2412 if (type & PERF_SAMPLE_STREAM_ID) {
2413 data->stream_id = *array;
2417 if (type & PERF_SAMPLE_CPU) {
2421 /* undo swap of u64, then swap on individual u32s */
2422 u.val64 = bswap_64(u.val64);
2423 u.val32[0] = bswap_32(u.val32[0]);
2426 data->cpu = u.val32[0];
2430 if (type & PERF_SAMPLE_PERIOD) {
2431 data->period = *array;
2435 if (type & PERF_SAMPLE_READ) {
2436 u64 read_format = evsel->core.attr.read_format;
2438 OVERFLOW_CHECK_u64(array);
2439 if (read_format & PERF_FORMAT_GROUP)
2440 data->read.group.nr = *array;
2442 data->read.one.value = *array;
2446 if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED) {
2447 OVERFLOW_CHECK_u64(array);
2448 data->read.time_enabled = *array;
2452 if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING) {
2453 OVERFLOW_CHECK_u64(array);
2454 data->read.time_running = *array;
2458 /* PERF_FORMAT_ID is forced for PERF_SAMPLE_READ */
2459 if (read_format & PERF_FORMAT_GROUP) {
2460 const u64 max_group_nr = UINT64_MAX /
2461 sizeof(struct sample_read_value);
2463 if (data->read.group.nr > max_group_nr)
2465 sz = data->read.group.nr *
2466 sizeof(struct sample_read_value);
2467 OVERFLOW_CHECK(array, sz, max_size);
2468 data->read.group.values =
2469 (struct sample_read_value *)array;
2470 array = (void *)array + sz;
2472 OVERFLOW_CHECK_u64(array);
2473 data->read.one.id = *array;
2478 if (type & PERF_SAMPLE_CALLCHAIN) {
2479 const u64 max_callchain_nr = UINT64_MAX / sizeof(u64);
2481 OVERFLOW_CHECK_u64(array);
2482 data->callchain = (struct ip_callchain *)array++;
2483 if (data->callchain->nr > max_callchain_nr)
2485 sz = data->callchain->nr * sizeof(u64);
2486 OVERFLOW_CHECK(array, sz, max_size);
2487 array = (void *)array + sz;
2490 if (type & PERF_SAMPLE_RAW) {
2491 OVERFLOW_CHECK_u64(array);
2495 * Undo swap of u64, then swap on individual u32s,
2496 * get the size of the raw area and undo all of the
2497 * swap. The pevent interface handles endianness by
2501 u.val64 = bswap_64(u.val64);
2502 u.val32[0] = bswap_32(u.val32[0]);
2503 u.val32[1] = bswap_32(u.val32[1]);
2505 data->raw_size = u.val32[0];
2508 * The raw data is aligned on 64bits including the
2509 * u32 size, so it's safe to use mem_bswap_64.
2512 mem_bswap_64((void *) array, data->raw_size);
2514 array = (void *)array + sizeof(u32);
2516 OVERFLOW_CHECK(array, data->raw_size, max_size);
2517 data->raw_data = (void *)array;
2518 array = (void *)array + data->raw_size;
2521 if (type & PERF_SAMPLE_BRANCH_STACK) {
2522 const u64 max_branch_nr = UINT64_MAX /
2523 sizeof(struct branch_entry);
2524 struct branch_entry *e;
2527 OVERFLOW_CHECK_u64(array);
2528 data->branch_stack = (struct branch_stack *)array++;
2530 if (data->branch_stack->nr > max_branch_nr)
2533 sz = data->branch_stack->nr * sizeof(struct branch_entry);
2534 if (evsel__has_branch_hw_idx(evsel)) {
2536 e = &data->branch_stack->entries[0];
2538 data->no_hw_idx = true;
2540 * if the PERF_SAMPLE_BRANCH_HW_INDEX is not applied,
2541 * only nr and entries[] will be output by kernel.
2543 e = (struct branch_entry *)&data->branch_stack->hw_idx;
2548 * struct branch_flag does not have endian
2549 * specific bit field definition. And bswap
2550 * will not resolve the issue, since these
2553 * evsel__bitfield_swap_branch_flags() uses a
2554 * bitfield_swap macro to swap the bit position
2555 * based on the host endians.
2557 for (i = 0; i < data->branch_stack->nr; i++, e++)
2558 e->flags.value = evsel__bitfield_swap_branch_flags(e->flags.value);
2561 OVERFLOW_CHECK(array, sz, max_size);
2562 array = (void *)array + sz;
2565 if (type & PERF_SAMPLE_REGS_USER) {
2566 OVERFLOW_CHECK_u64(array);
2567 data->user_regs.abi = *array;
2570 if (data->user_regs.abi) {
2571 u64 mask = evsel->core.attr.sample_regs_user;
2573 sz = hweight64(mask) * sizeof(u64);
2574 OVERFLOW_CHECK(array, sz, max_size);
2575 data->user_regs.mask = mask;
2576 data->user_regs.regs = (u64 *)array;
2577 array = (void *)array + sz;
2581 if (type & PERF_SAMPLE_STACK_USER) {
2582 OVERFLOW_CHECK_u64(array);
2585 data->user_stack.offset = ((char *)(array - 1)
2589 data->user_stack.size = 0;
2591 OVERFLOW_CHECK(array, sz, max_size);
2592 data->user_stack.data = (char *)array;
2593 array = (void *)array + sz;
2594 OVERFLOW_CHECK_u64(array);
2595 data->user_stack.size = *array++;
2596 if (WARN_ONCE(data->user_stack.size > sz,
2597 "user stack dump failure\n"))
2602 if (type & PERF_SAMPLE_WEIGHT_TYPE) {
2603 OVERFLOW_CHECK_u64(array);
2604 arch_perf_parse_sample_weight(data, array, type);
2608 if (type & PERF_SAMPLE_DATA_SRC) {
2609 OVERFLOW_CHECK_u64(array);
2610 data->data_src = *array;
2614 if (type & PERF_SAMPLE_TRANSACTION) {
2615 OVERFLOW_CHECK_u64(array);
2616 data->transaction = *array;
2620 data->intr_regs.abi = PERF_SAMPLE_REGS_ABI_NONE;
2621 if (type & PERF_SAMPLE_REGS_INTR) {
2622 OVERFLOW_CHECK_u64(array);
2623 data->intr_regs.abi = *array;
2626 if (data->intr_regs.abi != PERF_SAMPLE_REGS_ABI_NONE) {
2627 u64 mask = evsel->core.attr.sample_regs_intr;
2629 sz = hweight64(mask) * sizeof(u64);
2630 OVERFLOW_CHECK(array, sz, max_size);
2631 data->intr_regs.mask = mask;
2632 data->intr_regs.regs = (u64 *)array;
2633 array = (void *)array + sz;
2637 data->phys_addr = 0;
2638 if (type & PERF_SAMPLE_PHYS_ADDR) {
2639 data->phys_addr = *array;
2644 if (type & PERF_SAMPLE_CGROUP) {
2645 data->cgroup = *array;
2649 data->data_page_size = 0;
2650 if (type & PERF_SAMPLE_DATA_PAGE_SIZE) {
2651 data->data_page_size = *array;
2655 data->code_page_size = 0;
2656 if (type & PERF_SAMPLE_CODE_PAGE_SIZE) {
2657 data->code_page_size = *array;
2661 if (type & PERF_SAMPLE_AUX) {
2662 OVERFLOW_CHECK_u64(array);
2665 OVERFLOW_CHECK(array, sz, max_size);
2666 /* Undo swap of data */
2668 mem_bswap_64((char *)array, sz);
2669 data->aux_sample.size = sz;
2670 data->aux_sample.data = (char *)array;
2671 array = (void *)array + sz;
2677 int evsel__parse_sample_timestamp(struct evsel *evsel, union perf_event *event,
2680 u64 type = evsel->core.attr.sample_type;
2683 if (!(type & PERF_SAMPLE_TIME))
2686 if (event->header.type != PERF_RECORD_SAMPLE) {
2687 struct perf_sample data = {
2691 if (!evsel->core.attr.sample_id_all)
2693 if (perf_evsel__parse_id_sample(evsel, event, &data))
2696 *timestamp = data.time;
2700 array = event->sample.array;
2702 if (perf_event__check_size(event, evsel->sample_size))
2705 if (type & PERF_SAMPLE_IDENTIFIER)
2708 if (type & PERF_SAMPLE_IP)
2711 if (type & PERF_SAMPLE_TID)
2714 if (type & PERF_SAMPLE_TIME)
2715 *timestamp = *array;
2720 struct tep_format_field *evsel__field(struct evsel *evsel, const char *name)
2722 return tep_find_field(evsel->tp_format, name);
2725 void *evsel__rawptr(struct evsel *evsel, struct perf_sample *sample, const char *name)
2727 struct tep_format_field *field = evsel__field(evsel, name);
2733 offset = field->offset;
2735 if (field->flags & TEP_FIELD_IS_DYNAMIC) {
2736 offset = *(int *)(sample->raw_data + field->offset);
2738 if (field->flags & TEP_FIELD_IS_RELATIVE)
2739 offset += field->offset + field->size;
2742 return sample->raw_data + offset;
2745 u64 format_field__intval(struct tep_format_field *field, struct perf_sample *sample,
2749 void *ptr = sample->raw_data + field->offset;
2751 switch (field->size) {
2755 value = *(u16 *)ptr;
2758 value = *(u32 *)ptr;
2761 memcpy(&value, ptr, sizeof(u64));
2770 switch (field->size) {
2772 return bswap_16(value);
2774 return bswap_32(value);
2776 return bswap_64(value);
2784 u64 evsel__intval(struct evsel *evsel, struct perf_sample *sample, const char *name)
2786 struct tep_format_field *field = evsel__field(evsel, name);
2791 return field ? format_field__intval(field, sample, evsel->needs_swap) : 0;
2794 bool evsel__fallback(struct evsel *evsel, int err, char *msg, size_t msgsize)
2798 if ((err == ENOENT || err == ENXIO || err == ENODEV) &&
2799 evsel->core.attr.type == PERF_TYPE_HARDWARE &&
2800 evsel->core.attr.config == PERF_COUNT_HW_CPU_CYCLES) {
2802 * If it's cycles then fall back to hrtimer based
2803 * cpu-clock-tick sw counter, which is always available even if
2806 * PPC returns ENXIO until 2.6.37 (behavior changed with commit
2809 scnprintf(msg, msgsize, "%s",
2810 "The cycles event is not supported, trying to fall back to cpu-clock-ticks");
2812 evsel->core.attr.type = PERF_TYPE_SOFTWARE;
2813 evsel->core.attr.config = PERF_COUNT_SW_CPU_CLOCK;
2815 zfree(&evsel->name);
2817 } else if (err == EACCES && !evsel->core.attr.exclude_kernel &&
2818 (paranoid = perf_event_paranoid()) > 1) {
2819 const char *name = evsel__name(evsel);
2821 const char *sep = ":";
2823 /* If event has exclude user then don't exclude kernel. */
2824 if (evsel->core.attr.exclude_user)
2827 /* Is there already the separator in the name. */
2828 if (strchr(name, '/') ||
2829 (strchr(name, ':') && !evsel->is_libpfm_event))
2832 if (asprintf(&new_name, "%s%su", name, sep) < 0)
2837 evsel->name = new_name;
2838 scnprintf(msg, msgsize, "kernel.perf_event_paranoid=%d, trying "
2839 "to fall back to excluding kernel and hypervisor "
2840 " samples", paranoid);
2841 evsel->core.attr.exclude_kernel = 1;
2842 evsel->core.attr.exclude_hv = 1;
2850 static bool find_process(const char *name)
2852 size_t len = strlen(name);
2857 dir = opendir(procfs__mountpoint());
2861 /* Walk through the directory. */
2862 while (ret && (d = readdir(dir)) != NULL) {
2863 char path[PATH_MAX];
2867 if ((d->d_type != DT_DIR) ||
2868 !strcmp(".", d->d_name) ||
2869 !strcmp("..", d->d_name))
2872 scnprintf(path, sizeof(path), "%s/%s/comm",
2873 procfs__mountpoint(), d->d_name);
2875 if (filename__read_str(path, &data, &size))
2878 ret = strncmp(name, data, len);
2883 return ret ? false : true;
2886 static bool is_amd(const char *arch, const char *cpuid)
2888 return arch && !strcmp("x86", arch) && cpuid && strstarts(cpuid, "AuthenticAMD");
2891 static bool is_amd_ibs(struct evsel *evsel)
2893 return evsel->core.attr.precise_ip
2894 || (evsel->pmu_name && !strncmp(evsel->pmu_name, "ibs", 3));
2897 int evsel__open_strerror(struct evsel *evsel, struct target *target,
2898 int err, char *msg, size_t size)
2900 struct perf_env *env = evsel__env(evsel);
2901 const char *arch = perf_env__arch(env);
2902 const char *cpuid = perf_env__cpuid(env);
2903 char sbuf[STRERR_BUFSIZE];
2904 int printed = 0, enforced = 0;
2909 printed += scnprintf(msg + printed, size - printed,
2910 "Access to performance monitoring and observability operations is limited.\n");
2912 if (!sysfs__read_int("fs/selinux/enforce", &enforced)) {
2914 printed += scnprintf(msg + printed, size - printed,
2915 "Enforced MAC policy settings (SELinux) can limit access to performance\n"
2916 "monitoring and observability operations. Inspect system audit records for\n"
2917 "more perf_event access control information and adjusting the policy.\n");
2922 printed += scnprintf(msg, size,
2923 "No permission to enable %s event.\n\n", evsel__name(evsel));
2925 return scnprintf(msg + printed, size - printed,
2926 "Consider adjusting /proc/sys/kernel/perf_event_paranoid setting to open\n"
2927 "access to performance monitoring and observability operations for processes\n"
2928 "without CAP_PERFMON, CAP_SYS_PTRACE or CAP_SYS_ADMIN Linux capability.\n"
2929 "More information can be found at 'Perf events and tool security' document:\n"
2930 "https://www.kernel.org/doc/html/latest/admin-guide/perf-security.html\n"
2931 "perf_event_paranoid setting is %d:\n"
2932 " -1: Allow use of (almost) all events by all users\n"
2933 " Ignore mlock limit after perf_event_mlock_kb without CAP_IPC_LOCK\n"
2934 ">= 0: Disallow raw and ftrace function tracepoint access\n"
2935 ">= 1: Disallow CPU event access\n"
2936 ">= 2: Disallow kernel profiling\n"
2937 "To make the adjusted perf_event_paranoid setting permanent preserve it\n"
2938 "in /etc/sysctl.conf (e.g. kernel.perf_event_paranoid = <setting>)",
2939 perf_event_paranoid());
2941 return scnprintf(msg, size, "The %s event is not supported.", evsel__name(evsel));
2943 return scnprintf(msg, size, "%s",
2944 "Too many events are opened.\n"
2945 "Probably the maximum number of open file descriptors has been reached.\n"
2946 "Hint: Try again after reducing the number of events.\n"
2947 "Hint: Try increasing the limit with 'ulimit -n <limit>'");
2949 if (evsel__has_callchain(evsel) &&
2950 access("/proc/sys/kernel/perf_event_max_stack", F_OK) == 0)
2951 return scnprintf(msg, size,
2952 "Not enough memory to setup event with callchain.\n"
2953 "Hint: Try tweaking /proc/sys/kernel/perf_event_max_stack\n"
2954 "Hint: Current value: %d", sysctl__max_stack());
2957 if (target->cpu_list)
2958 return scnprintf(msg, size, "%s",
2959 "No such device - did you specify an out-of-range profile CPU?");
2962 if (evsel->core.attr.sample_type & PERF_SAMPLE_BRANCH_STACK)
2963 return scnprintf(msg, size,
2964 "%s: PMU Hardware or event type doesn't support branch stack sampling.",
2965 evsel__name(evsel));
2966 if (evsel->core.attr.aux_output)
2967 return scnprintf(msg, size,
2968 "%s: PMU Hardware doesn't support 'aux_output' feature",
2969 evsel__name(evsel));
2970 if (evsel->core.attr.sample_period != 0)
2971 return scnprintf(msg, size,
2972 "%s: PMU Hardware doesn't support sampling/overflow-interrupts. Try 'perf stat'",
2973 evsel__name(evsel));
2974 if (evsel->core.attr.precise_ip)
2975 return scnprintf(msg, size, "%s",
2976 "\'precise\' request may not be supported. Try removing 'p' modifier.");
2977 #if defined(__i386__) || defined(__x86_64__)
2978 if (evsel->core.attr.type == PERF_TYPE_HARDWARE)
2979 return scnprintf(msg, size, "%s",
2980 "No hardware sampling interrupt available.\n");
2984 if (find_process("oprofiled"))
2985 return scnprintf(msg, size,
2986 "The PMU counters are busy/taken by another profiler.\n"
2987 "We found oprofile daemon running, please stop it and try again.");
2990 if (evsel->core.attr.sample_type & PERF_SAMPLE_CODE_PAGE_SIZE && perf_missing_features.code_page_size)
2991 return scnprintf(msg, size, "Asking for the code page size isn't supported by this kernel.");
2992 if (evsel->core.attr.sample_type & PERF_SAMPLE_DATA_PAGE_SIZE && perf_missing_features.data_page_size)
2993 return scnprintf(msg, size, "Asking for the data page size isn't supported by this kernel.");
2994 if (evsel->core.attr.write_backward && perf_missing_features.write_backward)
2995 return scnprintf(msg, size, "Reading from overwrite event is not supported by this kernel.");
2996 if (perf_missing_features.clockid)
2997 return scnprintf(msg, size, "clockid feature not supported.");
2998 if (perf_missing_features.clockid_wrong)
2999 return scnprintf(msg, size, "wrong clockid (%d).", clockid);
3000 if (perf_missing_features.aux_output)
3001 return scnprintf(msg, size, "The 'aux_output' feature is not supported, update the kernel.");
3002 if (!target__has_cpu(target))
3003 return scnprintf(msg, size,
3004 "Invalid event (%s) in per-thread mode, enable system wide with '-a'.",
3005 evsel__name(evsel));
3006 if (is_amd(arch, cpuid)) {
3007 if (is_amd_ibs(evsel)) {
3008 if (evsel->core.attr.exclude_kernel)
3009 return scnprintf(msg, size,
3010 "AMD IBS can't exclude kernel events. Try running at a higher privilege level.");
3011 if (!evsel->core.system_wide)
3012 return scnprintf(msg, size,
3013 "AMD IBS may only be available in system-wide/per-cpu mode. Try using -a, or -C and workload affinity");
3019 return scnprintf(msg, size, "Cannot collect data source with the load latency event alone. "
3020 "Please add an auxiliary event in front of the load latency event.");
3025 return scnprintf(msg, size,
3026 "The sys_perf_event_open() syscall returned with %d (%s) for event (%s).\n"
3027 "/bin/dmesg | grep -i perf may provide additional information.\n",
3028 err, str_error_r(err, sbuf, sizeof(sbuf)), evsel__name(evsel));
3031 struct perf_env *evsel__env(struct evsel *evsel)
3033 if (evsel && evsel->evlist && evsel->evlist->env)
3034 return evsel->evlist->env;
3038 static int store_evsel_ids(struct evsel *evsel, struct evlist *evlist)
3040 int cpu_map_idx, thread;
3042 for (cpu_map_idx = 0; cpu_map_idx < xyarray__max_x(evsel->core.fd); cpu_map_idx++) {
3043 for (thread = 0; thread < xyarray__max_y(evsel->core.fd);
3045 int fd = FD(evsel, cpu_map_idx, thread);
3047 if (perf_evlist__id_add_fd(&evlist->core, &evsel->core,
3048 cpu_map_idx, thread, fd) < 0)
3056 int evsel__store_ids(struct evsel *evsel, struct evlist *evlist)
3058 struct perf_cpu_map *cpus = evsel->core.cpus;
3059 struct perf_thread_map *threads = evsel->core.threads;
3061 if (perf_evsel__alloc_id(&evsel->core, perf_cpu_map__nr(cpus), threads->nr))
3064 return store_evsel_ids(evsel, evlist);
3067 void evsel__zero_per_pkg(struct evsel *evsel)
3069 struct hashmap_entry *cur;
3072 if (evsel->per_pkg_mask) {
3073 hashmap__for_each_entry(evsel->per_pkg_mask, cur, bkt)
3074 free((char *)cur->key);
3076 hashmap__clear(evsel->per_pkg_mask);
3080 bool evsel__is_hybrid(struct evsel *evsel)
3082 return evsel->pmu_name && perf_pmu__is_hybrid(evsel->pmu_name);
3085 struct evsel *evsel__leader(struct evsel *evsel)
3087 return container_of(evsel->core.leader, struct evsel, core);
3090 bool evsel__has_leader(struct evsel *evsel, struct evsel *leader)
3092 return evsel->core.leader == &leader->core;
3095 bool evsel__is_leader(struct evsel *evsel)
3097 return evsel__has_leader(evsel, evsel);
3100 void evsel__set_leader(struct evsel *evsel, struct evsel *leader)
3102 evsel->core.leader = &leader->core;
3105 int evsel__source_count(const struct evsel *evsel)
3110 evlist__for_each_entry(evsel->evlist, pos) {
3111 if (pos->metric_leader == evsel)
3117 bool __weak arch_evsel__must_be_in_group(const struct evsel *evsel __maybe_unused)
3123 * Remove an event from a given group (leader).
3124 * Some events, e.g., perf metrics Topdown events,
3125 * must always be grouped. Ignore the events.
3127 void evsel__remove_from_group(struct evsel *evsel, struct evsel *leader)
3129 if (!arch_evsel__must_be_in_group(evsel) && evsel != leader) {
3130 evsel__set_leader(evsel, evsel);
3131 evsel->core.nr_members = 0;
3132 leader->core.nr_members--;