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 <linux/hw_breakpoint.h>
16 #include <linux/perf_event.h>
17 #include <linux/compiler.h>
18 #include <linux/err.h>
19 #include <linux/zalloc.h>
20 #include <sys/ioctl.h>
21 #include <sys/resource.h>
22 #include <sys/types.h>
25 #include <perf/evsel.h>
27 #include "bpf_counter.h"
28 #include "callchain.h"
34 #include "util/evsel_config.h"
35 #include "util/evsel_fprintf.h"
37 #include <perf/cpumap.h>
38 #include "thread_map.h"
40 #include "perf_regs.h"
43 #include "trace-event.h"
48 #include "util/hashmap.h"
49 #include "pmu-hybrid.h"
51 #include "../perf-sys.h"
52 #include "util/parse-branch-options.h"
53 #include <internal/xyarray.h>
54 #include <internal/lib.h>
55 #include <internal/threadmap.h>
57 #include <linux/ctype.h>
59 #ifdef HAVE_LIBTRACEEVENT
60 #include <traceevent/event-parse.h>
63 struct perf_missing_features perf_missing_features;
65 static clockid_t clockid;
67 static const char *const perf_tool_event__tool_names[PERF_TOOL_MAX] = {
74 const char *perf_tool_event__to_str(enum perf_tool_event ev)
76 if (ev > PERF_TOOL_NONE && ev < PERF_TOOL_MAX)
77 return perf_tool_event__tool_names[ev];
82 enum perf_tool_event perf_tool_event__from_str(const char *str)
86 perf_tool_event__for_each_event(i) {
87 if (!strcmp(str, perf_tool_event__tool_names[i]))
90 return PERF_TOOL_NONE;
94 static int evsel__no_extra_init(struct evsel *evsel __maybe_unused)
99 void __weak test_attr__ready(void) { }
101 static void evsel__no_extra_fini(struct evsel *evsel __maybe_unused)
107 int (*init)(struct evsel *evsel);
108 void (*fini)(struct evsel *evsel);
109 } perf_evsel__object = {
110 .size = sizeof(struct evsel),
111 .init = evsel__no_extra_init,
112 .fini = evsel__no_extra_fini,
115 int evsel__object_config(size_t object_size, int (*init)(struct evsel *evsel),
116 void (*fini)(struct evsel *evsel))
119 if (object_size == 0)
122 if (perf_evsel__object.size > object_size)
125 perf_evsel__object.size = object_size;
129 perf_evsel__object.init = init;
132 perf_evsel__object.fini = fini;
137 #define FD(e, x, y) (*(int *)xyarray__entry(e->core.fd, x, y))
139 int __evsel__sample_size(u64 sample_type)
141 u64 mask = sample_type & PERF_SAMPLE_MASK;
145 for (i = 0; i < 64; i++) {
146 if (mask & (1ULL << i))
156 * __perf_evsel__calc_id_pos - calculate id_pos.
157 * @sample_type: sample type
159 * This function returns the position of the event id (PERF_SAMPLE_ID or
160 * PERF_SAMPLE_IDENTIFIER) in a sample event i.e. in the array of struct
161 * perf_record_sample.
163 static int __perf_evsel__calc_id_pos(u64 sample_type)
167 if (sample_type & PERF_SAMPLE_IDENTIFIER)
170 if (!(sample_type & PERF_SAMPLE_ID))
173 if (sample_type & PERF_SAMPLE_IP)
176 if (sample_type & PERF_SAMPLE_TID)
179 if (sample_type & PERF_SAMPLE_TIME)
182 if (sample_type & PERF_SAMPLE_ADDR)
189 * __perf_evsel__calc_is_pos - calculate is_pos.
190 * @sample_type: sample type
192 * This function returns the position (counting backwards) of the event id
193 * (PERF_SAMPLE_ID or PERF_SAMPLE_IDENTIFIER) in a non-sample event i.e. if
194 * sample_id_all is used there is an id sample appended to non-sample events.
196 static int __perf_evsel__calc_is_pos(u64 sample_type)
200 if (sample_type & PERF_SAMPLE_IDENTIFIER)
203 if (!(sample_type & PERF_SAMPLE_ID))
206 if (sample_type & PERF_SAMPLE_CPU)
209 if (sample_type & PERF_SAMPLE_STREAM_ID)
215 void evsel__calc_id_pos(struct evsel *evsel)
217 evsel->id_pos = __perf_evsel__calc_id_pos(evsel->core.attr.sample_type);
218 evsel->is_pos = __perf_evsel__calc_is_pos(evsel->core.attr.sample_type);
221 void __evsel__set_sample_bit(struct evsel *evsel,
222 enum perf_event_sample_format bit)
224 if (!(evsel->core.attr.sample_type & bit)) {
225 evsel->core.attr.sample_type |= bit;
226 evsel->sample_size += sizeof(u64);
227 evsel__calc_id_pos(evsel);
231 void __evsel__reset_sample_bit(struct evsel *evsel,
232 enum perf_event_sample_format bit)
234 if (evsel->core.attr.sample_type & bit) {
235 evsel->core.attr.sample_type &= ~bit;
236 evsel->sample_size -= sizeof(u64);
237 evsel__calc_id_pos(evsel);
241 void evsel__set_sample_id(struct evsel *evsel,
242 bool can_sample_identifier)
244 if (can_sample_identifier) {
245 evsel__reset_sample_bit(evsel, ID);
246 evsel__set_sample_bit(evsel, IDENTIFIER);
248 evsel__set_sample_bit(evsel, ID);
250 evsel->core.attr.read_format |= PERF_FORMAT_ID;
254 * evsel__is_function_event - Return whether given evsel is a function
257 * @evsel - evsel selector to be tested
259 * Return %true if event is function trace event
261 bool evsel__is_function_event(struct evsel *evsel)
263 #define FUNCTION_EVENT "ftrace:function"
265 return evsel->name &&
266 !strncmp(FUNCTION_EVENT, evsel->name, sizeof(FUNCTION_EVENT));
268 #undef FUNCTION_EVENT
271 void evsel__init(struct evsel *evsel,
272 struct perf_event_attr *attr, int idx)
274 perf_evsel__init(&evsel->core, attr, idx);
275 evsel->tracking = !idx;
276 evsel->unit = strdup("");
278 evsel->max_events = ULONG_MAX;
279 evsel->evlist = NULL;
280 evsel->bpf_obj = NULL;
282 INIT_LIST_HEAD(&evsel->config_terms);
283 INIT_LIST_HEAD(&evsel->bpf_counter_list);
284 perf_evsel__object.init(evsel);
285 evsel->sample_size = __evsel__sample_size(attr->sample_type);
286 evsel__calc_id_pos(evsel);
287 evsel->cmdline_group_boundary = false;
288 evsel->metric_events = NULL;
289 evsel->per_pkg_mask = NULL;
290 evsel->collect_stat = false;
291 evsel->pmu_name = NULL;
294 struct evsel *evsel__new_idx(struct perf_event_attr *attr, int idx)
296 struct evsel *evsel = zalloc(perf_evsel__object.size);
300 evsel__init(evsel, attr, idx);
302 if (evsel__is_bpf_output(evsel) && !attr->sample_type) {
303 evsel->core.attr.sample_type = (PERF_SAMPLE_RAW | PERF_SAMPLE_TIME |
304 PERF_SAMPLE_CPU | PERF_SAMPLE_PERIOD),
305 evsel->core.attr.sample_period = 1;
308 if (evsel__is_clock(evsel)) {
309 free((char *)evsel->unit);
310 evsel->unit = strdup("msec");
317 static bool perf_event_can_profile_kernel(void)
319 return perf_event_paranoid_check(1);
322 struct evsel *evsel__new_cycles(bool precise __maybe_unused, __u32 type, __u64 config)
324 struct perf_event_attr attr = {
327 .exclude_kernel = !perf_event_can_profile_kernel(),
331 event_attr_init(&attr);
334 * Now let the usual logic to set up the perf_event_attr defaults
335 * to kick in when we return and before perf_evsel__open() is called.
337 evsel = evsel__new(&attr);
341 arch_evsel__fixup_new_cycles(&evsel->core.attr);
343 evsel->precise_max = true;
345 /* use asprintf() because free(evsel) assumes name is allocated */
346 if (asprintf(&evsel->name, "cycles%s%s%.*s",
347 (attr.precise_ip || attr.exclude_kernel) ? ":" : "",
348 attr.exclude_kernel ? "u" : "",
349 attr.precise_ip ? attr.precise_ip + 1 : 0, "ppp") < 0)
354 evsel__delete(evsel);
359 int copy_config_terms(struct list_head *dst, struct list_head *src)
361 struct evsel_config_term *pos, *tmp;
363 list_for_each_entry(pos, src, list) {
364 tmp = malloc(sizeof(*tmp));
370 tmp->val.str = strdup(pos->val.str);
371 if (tmp->val.str == NULL) {
376 list_add_tail(&tmp->list, dst);
381 static int evsel__copy_config_terms(struct evsel *dst, struct evsel *src)
383 return copy_config_terms(&dst->config_terms, &src->config_terms);
387 * evsel__clone - create a new evsel copied from @orig
388 * @orig: original evsel
390 * The assumption is that @orig is not configured nor opened yet.
391 * So we only care about the attributes that can be set while it's parsed.
393 struct evsel *evsel__clone(struct evsel *orig)
397 BUG_ON(orig->core.fd);
398 BUG_ON(orig->counts);
400 BUG_ON(orig->per_pkg_mask);
402 /* cannot handle BPF objects for now */
406 evsel = evsel__new(&orig->core.attr);
410 evsel->core.cpus = perf_cpu_map__get(orig->core.cpus);
411 evsel->core.own_cpus = perf_cpu_map__get(orig->core.own_cpus);
412 evsel->core.threads = perf_thread_map__get(orig->core.threads);
413 evsel->core.nr_members = orig->core.nr_members;
414 evsel->core.system_wide = orig->core.system_wide;
415 evsel->core.requires_cpu = orig->core.requires_cpu;
418 evsel->name = strdup(orig->name);
419 if (evsel->name == NULL)
422 if (orig->group_name) {
423 evsel->group_name = strdup(orig->group_name);
424 if (evsel->group_name == NULL)
427 if (orig->pmu_name) {
428 evsel->pmu_name = strdup(orig->pmu_name);
429 if (evsel->pmu_name == NULL)
433 evsel->filter = strdup(orig->filter);
434 if (evsel->filter == NULL)
437 if (orig->metric_id) {
438 evsel->metric_id = strdup(orig->metric_id);
439 if (evsel->metric_id == NULL)
442 evsel->cgrp = cgroup__get(orig->cgrp);
443 #ifdef HAVE_LIBTRACEEVENT
444 evsel->tp_format = orig->tp_format;
446 evsel->handler = orig->handler;
447 evsel->core.leader = orig->core.leader;
449 evsel->max_events = orig->max_events;
450 evsel->tool_event = orig->tool_event;
451 free((char *)evsel->unit);
452 evsel->unit = strdup(orig->unit);
453 if (evsel->unit == NULL)
456 evsel->scale = orig->scale;
457 evsel->snapshot = orig->snapshot;
458 evsel->per_pkg = orig->per_pkg;
459 evsel->percore = orig->percore;
460 evsel->precise_max = orig->precise_max;
461 evsel->use_uncore_alias = orig->use_uncore_alias;
462 evsel->is_libpfm_event = orig->is_libpfm_event;
464 evsel->exclude_GH = orig->exclude_GH;
465 evsel->sample_read = orig->sample_read;
466 evsel->auto_merge_stats = orig->auto_merge_stats;
467 evsel->collect_stat = orig->collect_stat;
468 evsel->weak_group = orig->weak_group;
469 evsel->use_config_name = orig->use_config_name;
470 evsel->pmu = orig->pmu;
472 if (evsel__copy_config_terms(evsel, orig) < 0)
478 evsel__delete(evsel);
483 * Returns pointer with encoded error via <linux/err.h> interface.
485 #ifdef HAVE_LIBTRACEEVENT
486 struct evsel *evsel__newtp_idx(const char *sys, const char *name, int idx)
488 struct evsel *evsel = zalloc(perf_evsel__object.size);
494 struct perf_event_attr attr = {
495 .type = PERF_TYPE_TRACEPOINT,
496 .sample_type = (PERF_SAMPLE_RAW | PERF_SAMPLE_TIME |
497 PERF_SAMPLE_CPU | PERF_SAMPLE_PERIOD),
500 if (asprintf(&evsel->name, "%s:%s", sys, name) < 0)
503 evsel->tp_format = trace_event__tp_format(sys, name);
504 if (IS_ERR(evsel->tp_format)) {
505 err = PTR_ERR(evsel->tp_format);
509 event_attr_init(&attr);
510 attr.config = evsel->tp_format->id;
511 attr.sample_period = 1;
512 evsel__init(evsel, &attr, idx);
525 const char *const evsel__hw_names[PERF_COUNT_HW_MAX] = {
533 "stalled-cycles-frontend",
534 "stalled-cycles-backend",
538 char *evsel__bpf_counter_events;
540 bool evsel__match_bpf_counter_events(const char *name)
546 if (!evsel__bpf_counter_events)
549 ptr = strstr(evsel__bpf_counter_events, name);
550 name_len = strlen(name);
552 /* check name matches a full token in evsel__bpf_counter_events */
553 match = (ptr != NULL) &&
554 ((ptr == evsel__bpf_counter_events) || (*(ptr - 1) == ',')) &&
555 ((*(ptr + name_len) == ',') || (*(ptr + name_len) == '\0'));
560 static const char *__evsel__hw_name(u64 config)
562 if (config < PERF_COUNT_HW_MAX && evsel__hw_names[config])
563 return evsel__hw_names[config];
565 return "unknown-hardware";
568 static int evsel__add_modifiers(struct evsel *evsel, char *bf, size_t size)
570 int colon = 0, r = 0;
571 struct perf_event_attr *attr = &evsel->core.attr;
572 bool exclude_guest_default = false;
574 #define MOD_PRINT(context, mod) do { \
575 if (!attr->exclude_##context) { \
576 if (!colon) colon = ++r; \
577 r += scnprintf(bf + r, size - r, "%c", mod); \
580 if (attr->exclude_kernel || attr->exclude_user || attr->exclude_hv) {
581 MOD_PRINT(kernel, 'k');
582 MOD_PRINT(user, 'u');
584 exclude_guest_default = true;
587 if (attr->precise_ip) {
590 r += scnprintf(bf + r, size - r, "%.*s", attr->precise_ip, "ppp");
591 exclude_guest_default = true;
594 if (attr->exclude_host || attr->exclude_guest == exclude_guest_default) {
595 MOD_PRINT(host, 'H');
596 MOD_PRINT(guest, 'G');
604 int __weak arch_evsel__hw_name(struct evsel *evsel, char *bf, size_t size)
606 return scnprintf(bf, size, "%s", __evsel__hw_name(evsel->core.attr.config));
609 static int evsel__hw_name(struct evsel *evsel, char *bf, size_t size)
611 int r = arch_evsel__hw_name(evsel, bf, size);
612 return r + evsel__add_modifiers(evsel, bf + r, size - r);
615 const char *const evsel__sw_names[PERF_COUNT_SW_MAX] = {
628 static const char *__evsel__sw_name(u64 config)
630 if (config < PERF_COUNT_SW_MAX && evsel__sw_names[config])
631 return evsel__sw_names[config];
632 return "unknown-software";
635 static int evsel__sw_name(struct evsel *evsel, char *bf, size_t size)
637 int r = scnprintf(bf, size, "%s", __evsel__sw_name(evsel->core.attr.config));
638 return r + evsel__add_modifiers(evsel, bf + r, size - r);
641 static int evsel__tool_name(enum perf_tool_event ev, char *bf, size_t size)
643 return scnprintf(bf, size, "%s", perf_tool_event__to_str(ev));
646 static int __evsel__bp_name(char *bf, size_t size, u64 addr, u64 type)
650 r = scnprintf(bf, size, "mem:0x%" PRIx64 ":", addr);
652 if (type & HW_BREAKPOINT_R)
653 r += scnprintf(bf + r, size - r, "r");
655 if (type & HW_BREAKPOINT_W)
656 r += scnprintf(bf + r, size - r, "w");
658 if (type & HW_BREAKPOINT_X)
659 r += scnprintf(bf + r, size - r, "x");
664 static int evsel__bp_name(struct evsel *evsel, char *bf, size_t size)
666 struct perf_event_attr *attr = &evsel->core.attr;
667 int r = __evsel__bp_name(bf, size, attr->bp_addr, attr->bp_type);
668 return r + evsel__add_modifiers(evsel, bf + r, size - r);
671 const char *const evsel__hw_cache[PERF_COUNT_HW_CACHE_MAX][EVSEL__MAX_ALIASES] = {
672 { "L1-dcache", "l1-d", "l1d", "L1-data", },
673 { "L1-icache", "l1-i", "l1i", "L1-instruction", },
675 { "dTLB", "d-tlb", "Data-TLB", },
676 { "iTLB", "i-tlb", "Instruction-TLB", },
677 { "branch", "branches", "bpu", "btb", "bpc", },
681 const char *const evsel__hw_cache_op[PERF_COUNT_HW_CACHE_OP_MAX][EVSEL__MAX_ALIASES] = {
682 { "load", "loads", "read", },
683 { "store", "stores", "write", },
684 { "prefetch", "prefetches", "speculative-read", "speculative-load", },
687 const char *const evsel__hw_cache_result[PERF_COUNT_HW_CACHE_RESULT_MAX][EVSEL__MAX_ALIASES] = {
688 { "refs", "Reference", "ops", "access", },
689 { "misses", "miss", },
692 #define C(x) PERF_COUNT_HW_CACHE_##x
693 #define CACHE_READ (1 << C(OP_READ))
694 #define CACHE_WRITE (1 << C(OP_WRITE))
695 #define CACHE_PREFETCH (1 << C(OP_PREFETCH))
696 #define COP(x) (1 << x)
699 * cache operation stat
700 * L1I : Read and prefetch only
701 * ITLB and BPU : Read-only
703 static const unsigned long evsel__hw_cache_stat[C(MAX)] = {
704 [C(L1D)] = (CACHE_READ | CACHE_WRITE | CACHE_PREFETCH),
705 [C(L1I)] = (CACHE_READ | CACHE_PREFETCH),
706 [C(LL)] = (CACHE_READ | CACHE_WRITE | CACHE_PREFETCH),
707 [C(DTLB)] = (CACHE_READ | CACHE_WRITE | CACHE_PREFETCH),
708 [C(ITLB)] = (CACHE_READ),
709 [C(BPU)] = (CACHE_READ),
710 [C(NODE)] = (CACHE_READ | CACHE_WRITE | CACHE_PREFETCH),
713 bool evsel__is_cache_op_valid(u8 type, u8 op)
715 if (evsel__hw_cache_stat[type] & COP(op))
716 return true; /* valid */
718 return false; /* invalid */
721 int __evsel__hw_cache_type_op_res_name(u8 type, u8 op, u8 result, char *bf, size_t size)
724 return scnprintf(bf, size, "%s-%s-%s", evsel__hw_cache[type][0],
725 evsel__hw_cache_op[op][0],
726 evsel__hw_cache_result[result][0]);
729 return scnprintf(bf, size, "%s-%s", evsel__hw_cache[type][0],
730 evsel__hw_cache_op[op][1]);
733 static int __evsel__hw_cache_name(u64 config, char *bf, size_t size)
735 u8 op, result, type = (config >> 0) & 0xff;
736 const char *err = "unknown-ext-hardware-cache-type";
738 if (type >= PERF_COUNT_HW_CACHE_MAX)
741 op = (config >> 8) & 0xff;
742 err = "unknown-ext-hardware-cache-op";
743 if (op >= PERF_COUNT_HW_CACHE_OP_MAX)
746 result = (config >> 16) & 0xff;
747 err = "unknown-ext-hardware-cache-result";
748 if (result >= PERF_COUNT_HW_CACHE_RESULT_MAX)
751 err = "invalid-cache";
752 if (!evsel__is_cache_op_valid(type, op))
755 return __evsel__hw_cache_type_op_res_name(type, op, result, bf, size);
757 return scnprintf(bf, size, "%s", err);
760 static int evsel__hw_cache_name(struct evsel *evsel, char *bf, size_t size)
762 int ret = __evsel__hw_cache_name(evsel->core.attr.config, bf, size);
763 return ret + evsel__add_modifiers(evsel, bf + ret, size - ret);
766 static int evsel__raw_name(struct evsel *evsel, char *bf, size_t size)
768 int ret = scnprintf(bf, size, "raw 0x%" PRIx64, evsel->core.attr.config);
769 return ret + evsel__add_modifiers(evsel, bf + ret, size - ret);
772 const char *evsel__name(struct evsel *evsel)
782 switch (evsel->core.attr.type) {
784 evsel__raw_name(evsel, bf, sizeof(bf));
787 case PERF_TYPE_HARDWARE:
788 evsel__hw_name(evsel, bf, sizeof(bf));
791 case PERF_TYPE_HW_CACHE:
792 evsel__hw_cache_name(evsel, bf, sizeof(bf));
795 case PERF_TYPE_SOFTWARE:
796 if (evsel__is_tool(evsel))
797 evsel__tool_name(evsel->tool_event, bf, sizeof(bf));
799 evsel__sw_name(evsel, bf, sizeof(bf));
802 case PERF_TYPE_TRACEPOINT:
803 scnprintf(bf, sizeof(bf), "%s", "unknown tracepoint");
806 case PERF_TYPE_BREAKPOINT:
807 evsel__bp_name(evsel, bf, sizeof(bf));
811 scnprintf(bf, sizeof(bf), "unknown attr type: %d",
812 evsel->core.attr.type);
816 evsel->name = strdup(bf);
824 const char *evsel__group_pmu_name(const struct evsel *evsel)
826 const struct evsel *leader;
828 /* If the pmu_name is set use it. pmu_name isn't set for CPU and software events. */
830 return evsel->pmu_name;
832 * Software events may be in a group with other uncore PMU events. Use
833 * the pmu_name of the group leader to avoid breaking the software event
836 * Aux event leaders, like intel_pt, expect a group with events from
837 * other PMUs, so substitute the AUX event's PMU in this case.
839 leader = evsel__leader(evsel);
840 if ((evsel->core.attr.type == PERF_TYPE_SOFTWARE || evsel__is_aux_event(leader)) &&
842 return leader->pmu_name;
848 const char *evsel__metric_id(const struct evsel *evsel)
850 if (evsel->metric_id)
851 return evsel->metric_id;
853 if (evsel__is_tool(evsel))
854 return perf_tool_event__to_str(evsel->tool_event);
859 const char *evsel__group_name(struct evsel *evsel)
861 return evsel->group_name ?: "anon group";
865 * Returns the group details for the specified leader,
866 * with following rules.
868 * For record -e '{cycles,instructions}'
869 * 'anon group { cycles:u, instructions:u }'
871 * For record -e 'cycles,instructions' and report --group
872 * 'cycles:u, instructions:u'
874 int evsel__group_desc(struct evsel *evsel, char *buf, size_t size)
878 const char *group_name = evsel__group_name(evsel);
880 if (!evsel->forced_leader)
881 ret = scnprintf(buf, size, "%s { ", group_name);
883 ret += scnprintf(buf + ret, size - ret, "%s", evsel__name(evsel));
885 for_each_group_member(pos, evsel)
886 ret += scnprintf(buf + ret, size - ret, ", %s", evsel__name(pos));
888 if (!evsel->forced_leader)
889 ret += scnprintf(buf + ret, size - ret, " }");
894 static void __evsel__config_callchain(struct evsel *evsel, struct record_opts *opts,
895 struct callchain_param *param)
897 bool function = evsel__is_function_event(evsel);
898 struct perf_event_attr *attr = &evsel->core.attr;
900 evsel__set_sample_bit(evsel, CALLCHAIN);
902 attr->sample_max_stack = param->max_stack;
904 if (opts->kernel_callchains)
905 attr->exclude_callchain_user = 1;
906 if (opts->user_callchains)
907 attr->exclude_callchain_kernel = 1;
908 if (param->record_mode == CALLCHAIN_LBR) {
909 if (!opts->branch_stack) {
910 if (attr->exclude_user) {
911 pr_warning("LBR callstack option is only available "
912 "to get user callchain information. "
913 "Falling back to framepointers.\n");
915 evsel__set_sample_bit(evsel, BRANCH_STACK);
916 attr->branch_sample_type = PERF_SAMPLE_BRANCH_USER |
917 PERF_SAMPLE_BRANCH_CALL_STACK |
918 PERF_SAMPLE_BRANCH_NO_CYCLES |
919 PERF_SAMPLE_BRANCH_NO_FLAGS |
920 PERF_SAMPLE_BRANCH_HW_INDEX;
923 pr_warning("Cannot use LBR callstack with branch stack. "
924 "Falling back to framepointers.\n");
927 if (param->record_mode == CALLCHAIN_DWARF) {
929 evsel__set_sample_bit(evsel, REGS_USER);
930 evsel__set_sample_bit(evsel, STACK_USER);
931 if (opts->sample_user_regs && DWARF_MINIMAL_REGS != PERF_REGS_MASK) {
932 attr->sample_regs_user |= DWARF_MINIMAL_REGS;
933 pr_warning("WARNING: The use of --call-graph=dwarf may require all the user registers, "
934 "specifying a subset with --user-regs may render DWARF unwinding unreliable, "
935 "so the minimal registers set (IP, SP) is explicitly forced.\n");
937 attr->sample_regs_user |= arch__user_reg_mask();
939 attr->sample_stack_user = param->dump_size;
940 attr->exclude_callchain_user = 1;
942 pr_info("Cannot use DWARF unwind for function trace event,"
943 " falling back to framepointers.\n");
948 pr_info("Disabling user space callchains for function trace event.\n");
949 attr->exclude_callchain_user = 1;
953 void evsel__config_callchain(struct evsel *evsel, struct record_opts *opts,
954 struct callchain_param *param)
957 return __evsel__config_callchain(evsel, opts, param);
960 static void evsel__reset_callgraph(struct evsel *evsel, struct callchain_param *param)
962 struct perf_event_attr *attr = &evsel->core.attr;
964 evsel__reset_sample_bit(evsel, CALLCHAIN);
965 if (param->record_mode == CALLCHAIN_LBR) {
966 evsel__reset_sample_bit(evsel, BRANCH_STACK);
967 attr->branch_sample_type &= ~(PERF_SAMPLE_BRANCH_USER |
968 PERF_SAMPLE_BRANCH_CALL_STACK |
969 PERF_SAMPLE_BRANCH_HW_INDEX);
971 if (param->record_mode == CALLCHAIN_DWARF) {
972 evsel__reset_sample_bit(evsel, REGS_USER);
973 evsel__reset_sample_bit(evsel, STACK_USER);
977 static void evsel__apply_config_terms(struct evsel *evsel,
978 struct record_opts *opts, bool track)
980 struct evsel_config_term *term;
981 struct list_head *config_terms = &evsel->config_terms;
982 struct perf_event_attr *attr = &evsel->core.attr;
983 /* callgraph default */
984 struct callchain_param param = {
985 .record_mode = callchain_param.record_mode,
989 const char *callgraph_buf = NULL;
991 list_for_each_entry(term, config_terms, list) {
992 switch (term->type) {
993 case EVSEL__CONFIG_TERM_PERIOD:
994 if (!(term->weak && opts->user_interval != ULLONG_MAX)) {
995 attr->sample_period = term->val.period;
997 evsel__reset_sample_bit(evsel, PERIOD);
1000 case EVSEL__CONFIG_TERM_FREQ:
1001 if (!(term->weak && opts->user_freq != UINT_MAX)) {
1002 attr->sample_freq = term->val.freq;
1004 evsel__set_sample_bit(evsel, PERIOD);
1007 case EVSEL__CONFIG_TERM_TIME:
1009 evsel__set_sample_bit(evsel, TIME);
1011 evsel__reset_sample_bit(evsel, TIME);
1013 case EVSEL__CONFIG_TERM_CALLGRAPH:
1014 callgraph_buf = term->val.str;
1016 case EVSEL__CONFIG_TERM_BRANCH:
1017 if (term->val.str && strcmp(term->val.str, "no")) {
1018 evsel__set_sample_bit(evsel, BRANCH_STACK);
1019 parse_branch_str(term->val.str,
1020 &attr->branch_sample_type);
1022 evsel__reset_sample_bit(evsel, BRANCH_STACK);
1024 case EVSEL__CONFIG_TERM_STACK_USER:
1025 dump_size = term->val.stack_user;
1027 case EVSEL__CONFIG_TERM_MAX_STACK:
1028 max_stack = term->val.max_stack;
1030 case EVSEL__CONFIG_TERM_MAX_EVENTS:
1031 evsel->max_events = term->val.max_events;
1033 case EVSEL__CONFIG_TERM_INHERIT:
1035 * attr->inherit should has already been set by
1036 * evsel__config. If user explicitly set
1037 * inherit using config terms, override global
1038 * opt->no_inherit setting.
1040 attr->inherit = term->val.inherit ? 1 : 0;
1042 case EVSEL__CONFIG_TERM_OVERWRITE:
1043 attr->write_backward = term->val.overwrite ? 1 : 0;
1045 case EVSEL__CONFIG_TERM_DRV_CFG:
1047 case EVSEL__CONFIG_TERM_PERCORE:
1049 case EVSEL__CONFIG_TERM_AUX_OUTPUT:
1050 attr->aux_output = term->val.aux_output ? 1 : 0;
1052 case EVSEL__CONFIG_TERM_AUX_SAMPLE_SIZE:
1053 /* Already applied by auxtrace */
1055 case EVSEL__CONFIG_TERM_CFG_CHG:
1062 /* User explicitly set per-event callgraph, clear the old setting and reset. */
1063 if ((callgraph_buf != NULL) || (dump_size > 0) || max_stack) {
1064 bool sample_address = false;
1067 param.max_stack = max_stack;
1068 if (callgraph_buf == NULL)
1069 callgraph_buf = "fp";
1072 /* parse callgraph parameters */
1073 if (callgraph_buf != NULL) {
1074 if (!strcmp(callgraph_buf, "no")) {
1075 param.enabled = false;
1076 param.record_mode = CALLCHAIN_NONE;
1078 param.enabled = true;
1079 if (parse_callchain_record(callgraph_buf, ¶m)) {
1080 pr_err("per-event callgraph setting for %s failed. "
1081 "Apply callgraph global setting for it\n",
1085 if (param.record_mode == CALLCHAIN_DWARF)
1086 sample_address = true;
1089 if (dump_size > 0) {
1090 dump_size = round_up(dump_size, sizeof(u64));
1091 param.dump_size = dump_size;
1094 /* If global callgraph set, clear it */
1095 if (callchain_param.enabled)
1096 evsel__reset_callgraph(evsel, &callchain_param);
1098 /* set perf-event callgraph */
1099 if (param.enabled) {
1100 if (sample_address) {
1101 evsel__set_sample_bit(evsel, ADDR);
1102 evsel__set_sample_bit(evsel, DATA_SRC);
1103 evsel->core.attr.mmap_data = track;
1105 evsel__config_callchain(evsel, opts, ¶m);
1110 struct evsel_config_term *__evsel__get_config_term(struct evsel *evsel, enum evsel_term_type type)
1112 struct evsel_config_term *term, *found_term = NULL;
1114 list_for_each_entry(term, &evsel->config_terms, list) {
1115 if (term->type == type)
1122 void __weak arch_evsel__set_sample_weight(struct evsel *evsel)
1124 evsel__set_sample_bit(evsel, WEIGHT);
1127 void __weak arch_evsel__fixup_new_cycles(struct perf_event_attr *attr __maybe_unused)
1131 void __weak arch__post_evsel_config(struct evsel *evsel __maybe_unused,
1132 struct perf_event_attr *attr __maybe_unused)
1136 static void evsel__set_default_freq_period(struct record_opts *opts,
1137 struct perf_event_attr *attr)
1141 attr->sample_freq = opts->freq;
1143 attr->sample_period = opts->default_interval;
1147 static bool evsel__is_offcpu_event(struct evsel *evsel)
1149 return evsel__is_bpf_output(evsel) && !strcmp(evsel->name, OFFCPU_EVENT);
1153 * The enable_on_exec/disabled value strategy:
1155 * 1) For any type of traced program:
1156 * - all independent events and group leaders are disabled
1157 * - all group members are enabled
1159 * Group members are ruled by group leaders. They need to
1160 * be enabled, because the group scheduling relies on that.
1162 * 2) For traced programs executed by perf:
1163 * - all independent events and group leaders have
1164 * enable_on_exec set
1165 * - we don't specifically enable or disable any event during
1166 * the record command
1168 * Independent events and group leaders are initially disabled
1169 * and get enabled by exec. Group members are ruled by group
1170 * leaders as stated in 1).
1172 * 3) For traced programs attached by perf (pid/tid):
1173 * - we specifically enable or disable all events during
1174 * the record command
1176 * When attaching events to already running traced we
1177 * enable/disable events specifically, as there's no
1178 * initial traced exec call.
1180 void evsel__config(struct evsel *evsel, struct record_opts *opts,
1181 struct callchain_param *callchain)
1183 struct evsel *leader = evsel__leader(evsel);
1184 struct perf_event_attr *attr = &evsel->core.attr;
1185 int track = evsel->tracking;
1186 bool per_cpu = opts->target.default_per_cpu && !opts->target.per_thread;
1188 attr->sample_id_all = perf_missing_features.sample_id_all ? 0 : 1;
1189 attr->inherit = !opts->no_inherit;
1190 attr->write_backward = opts->overwrite ? 1 : 0;
1191 attr->read_format = PERF_FORMAT_LOST;
1193 evsel__set_sample_bit(evsel, IP);
1194 evsel__set_sample_bit(evsel, TID);
1196 if (evsel->sample_read) {
1197 evsel__set_sample_bit(evsel, READ);
1200 * We need ID even in case of single event, because
1201 * PERF_SAMPLE_READ process ID specific data.
1203 evsel__set_sample_id(evsel, false);
1206 * Apply group format only if we belong to group
1207 * with more than one members.
1209 if (leader->core.nr_members > 1) {
1210 attr->read_format |= PERF_FORMAT_GROUP;
1216 * We default some events to have a default interval. But keep
1217 * it a weak assumption overridable by the user.
1219 if ((evsel->is_libpfm_event && !attr->sample_period) ||
1220 (!evsel->is_libpfm_event && (!attr->sample_period ||
1221 opts->user_freq != UINT_MAX ||
1222 opts->user_interval != ULLONG_MAX)))
1223 evsel__set_default_freq_period(opts, attr);
1226 * If attr->freq was set (here or earlier), ask for period
1230 evsel__set_sample_bit(evsel, PERIOD);
1232 if (opts->no_samples)
1233 attr->sample_freq = 0;
1235 if (opts->inherit_stat) {
1236 evsel->core.attr.read_format |=
1237 PERF_FORMAT_TOTAL_TIME_ENABLED |
1238 PERF_FORMAT_TOTAL_TIME_RUNNING |
1240 attr->inherit_stat = 1;
1243 if (opts->sample_address) {
1244 evsel__set_sample_bit(evsel, ADDR);
1245 attr->mmap_data = track;
1249 * We don't allow user space callchains for function trace
1250 * event, due to issues with page faults while tracing page
1251 * fault handler and its overall trickiness nature.
1253 if (evsel__is_function_event(evsel))
1254 evsel->core.attr.exclude_callchain_user = 1;
1256 if (callchain && callchain->enabled && !evsel->no_aux_samples)
1257 evsel__config_callchain(evsel, opts, callchain);
1259 if (opts->sample_intr_regs && !evsel->no_aux_samples &&
1260 !evsel__is_dummy_event(evsel)) {
1261 attr->sample_regs_intr = opts->sample_intr_regs;
1262 evsel__set_sample_bit(evsel, REGS_INTR);
1265 if (opts->sample_user_regs && !evsel->no_aux_samples &&
1266 !evsel__is_dummy_event(evsel)) {
1267 attr->sample_regs_user |= opts->sample_user_regs;
1268 evsel__set_sample_bit(evsel, REGS_USER);
1271 if (target__has_cpu(&opts->target) || opts->sample_cpu)
1272 evsel__set_sample_bit(evsel, CPU);
1275 * When the user explicitly disabled time don't force it here.
1277 if (opts->sample_time &&
1278 (!perf_missing_features.sample_id_all &&
1279 (!opts->no_inherit || target__has_cpu(&opts->target) || per_cpu ||
1280 opts->sample_time_set)))
1281 evsel__set_sample_bit(evsel, TIME);
1283 if (opts->raw_samples && !evsel->no_aux_samples) {
1284 evsel__set_sample_bit(evsel, TIME);
1285 evsel__set_sample_bit(evsel, RAW);
1286 evsel__set_sample_bit(evsel, CPU);
1289 if (opts->sample_address)
1290 evsel__set_sample_bit(evsel, DATA_SRC);
1292 if (opts->sample_phys_addr)
1293 evsel__set_sample_bit(evsel, PHYS_ADDR);
1295 if (opts->no_buffering) {
1296 attr->watermark = 0;
1297 attr->wakeup_events = 1;
1299 if (opts->branch_stack && !evsel->no_aux_samples) {
1300 evsel__set_sample_bit(evsel, BRANCH_STACK);
1301 attr->branch_sample_type = opts->branch_stack;
1304 if (opts->sample_weight)
1305 arch_evsel__set_sample_weight(evsel);
1309 attr->mmap2 = track && !perf_missing_features.mmap2;
1311 attr->build_id = track && opts->build_id;
1314 * ksymbol is tracked separately with text poke because it needs to be
1315 * system wide and enabled immediately.
1317 if (!opts->text_poke)
1318 attr->ksymbol = track && !perf_missing_features.ksymbol;
1319 attr->bpf_event = track && !opts->no_bpf_event && !perf_missing_features.bpf;
1321 if (opts->record_namespaces)
1322 attr->namespaces = track;
1324 if (opts->record_cgroup) {
1325 attr->cgroup = track && !perf_missing_features.cgroup;
1326 evsel__set_sample_bit(evsel, CGROUP);
1329 if (opts->sample_data_page_size)
1330 evsel__set_sample_bit(evsel, DATA_PAGE_SIZE);
1332 if (opts->sample_code_page_size)
1333 evsel__set_sample_bit(evsel, CODE_PAGE_SIZE);
1335 if (opts->record_switch_events)
1336 attr->context_switch = track;
1338 if (opts->sample_transaction)
1339 evsel__set_sample_bit(evsel, TRANSACTION);
1341 if (opts->running_time) {
1342 evsel->core.attr.read_format |=
1343 PERF_FORMAT_TOTAL_TIME_ENABLED |
1344 PERF_FORMAT_TOTAL_TIME_RUNNING;
1348 * XXX see the function comment above
1350 * Disabling only independent events or group leaders,
1351 * keeping group members enabled.
1353 if (evsel__is_group_leader(evsel))
1357 * Setting enable_on_exec for independent events and
1358 * group leaders for traced executed by perf.
1360 if (target__none(&opts->target) && evsel__is_group_leader(evsel) &&
1361 !opts->target.initial_delay)
1362 attr->enable_on_exec = 1;
1364 if (evsel->immediate) {
1366 attr->enable_on_exec = 0;
1369 clockid = opts->clockid;
1370 if (opts->use_clockid) {
1371 attr->use_clockid = 1;
1372 attr->clockid = opts->clockid;
1375 if (evsel->precise_max)
1376 attr->precise_ip = 3;
1378 if (opts->all_user) {
1379 attr->exclude_kernel = 1;
1380 attr->exclude_user = 0;
1383 if (opts->all_kernel) {
1384 attr->exclude_kernel = 0;
1385 attr->exclude_user = 1;
1388 if (evsel->core.own_cpus || evsel->unit)
1389 evsel->core.attr.read_format |= PERF_FORMAT_ID;
1392 * Apply event specific term settings,
1393 * it overloads any global configuration.
1395 evsel__apply_config_terms(evsel, opts, track);
1397 evsel->ignore_missing_thread = opts->ignore_missing_thread;
1399 /* The --period option takes the precedence. */
1400 if (opts->period_set) {
1402 evsel__set_sample_bit(evsel, PERIOD);
1404 evsel__reset_sample_bit(evsel, PERIOD);
1408 * A dummy event never triggers any actual counter and therefore
1409 * cannot be used with branch_stack.
1411 * For initial_delay, a dummy event is added implicitly.
1412 * The software event will trigger -EOPNOTSUPP error out,
1413 * if BRANCH_STACK bit is set.
1415 if (evsel__is_dummy_event(evsel))
1416 evsel__reset_sample_bit(evsel, BRANCH_STACK);
1418 if (evsel__is_offcpu_event(evsel))
1419 evsel->core.attr.sample_type &= OFFCPU_SAMPLE_TYPES;
1421 arch__post_evsel_config(evsel, attr);
1424 int evsel__set_filter(struct evsel *evsel, const char *filter)
1426 char *new_filter = strdup(filter);
1428 if (new_filter != NULL) {
1429 free(evsel->filter);
1430 evsel->filter = new_filter;
1437 static int evsel__append_filter(struct evsel *evsel, const char *fmt, const char *filter)
1441 if (evsel->filter == NULL)
1442 return evsel__set_filter(evsel, filter);
1444 if (asprintf(&new_filter, fmt, evsel->filter, filter) > 0) {
1445 free(evsel->filter);
1446 evsel->filter = new_filter;
1453 int evsel__append_tp_filter(struct evsel *evsel, const char *filter)
1455 return evsel__append_filter(evsel, "(%s) && (%s)", filter);
1458 int evsel__append_addr_filter(struct evsel *evsel, const char *filter)
1460 return evsel__append_filter(evsel, "%s,%s", filter);
1463 /* Caller has to clear disabled after going through all CPUs. */
1464 int evsel__enable_cpu(struct evsel *evsel, int cpu_map_idx)
1466 return perf_evsel__enable_cpu(&evsel->core, cpu_map_idx);
1469 int evsel__enable(struct evsel *evsel)
1471 int err = perf_evsel__enable(&evsel->core);
1474 evsel->disabled = false;
1478 /* Caller has to set disabled after going through all CPUs. */
1479 int evsel__disable_cpu(struct evsel *evsel, int cpu_map_idx)
1481 return perf_evsel__disable_cpu(&evsel->core, cpu_map_idx);
1484 int evsel__disable(struct evsel *evsel)
1486 int err = perf_evsel__disable(&evsel->core);
1488 * We mark it disabled here so that tools that disable a event can
1489 * ignore events after they disable it. I.e. the ring buffer may have
1490 * already a few more events queued up before the kernel got the stop
1494 evsel->disabled = true;
1499 void free_config_terms(struct list_head *config_terms)
1501 struct evsel_config_term *term, *h;
1503 list_for_each_entry_safe(term, h, config_terms, list) {
1504 list_del_init(&term->list);
1506 zfree(&term->val.str);
1511 static void evsel__free_config_terms(struct evsel *evsel)
1513 free_config_terms(&evsel->config_terms);
1516 void evsel__exit(struct evsel *evsel)
1518 assert(list_empty(&evsel->core.node));
1519 assert(evsel->evlist == NULL);
1520 bpf_counter__destroy(evsel);
1521 evsel__free_counts(evsel);
1522 perf_evsel__free_fd(&evsel->core);
1523 perf_evsel__free_id(&evsel->core);
1524 evsel__free_config_terms(evsel);
1525 cgroup__put(evsel->cgrp);
1526 perf_cpu_map__put(evsel->core.cpus);
1527 perf_cpu_map__put(evsel->core.own_cpus);
1528 perf_thread_map__put(evsel->core.threads);
1529 zfree(&evsel->group_name);
1530 zfree(&evsel->name);
1531 zfree(&evsel->pmu_name);
1532 zfree(&evsel->unit);
1533 zfree(&evsel->metric_id);
1534 evsel__zero_per_pkg(evsel);
1535 hashmap__free(evsel->per_pkg_mask);
1536 evsel->per_pkg_mask = NULL;
1537 zfree(&evsel->metric_events);
1538 perf_evsel__object.fini(evsel);
1541 void evsel__delete(struct evsel *evsel)
1547 void evsel__compute_deltas(struct evsel *evsel, int cpu_map_idx, int thread,
1548 struct perf_counts_values *count)
1550 struct perf_counts_values tmp;
1552 if (!evsel->prev_raw_counts)
1555 tmp = *perf_counts(evsel->prev_raw_counts, cpu_map_idx, thread);
1556 *perf_counts(evsel->prev_raw_counts, cpu_map_idx, thread) = *count;
1558 count->val = count->val - tmp.val;
1559 count->ena = count->ena - tmp.ena;
1560 count->run = count->run - tmp.run;
1563 static int evsel__read_one(struct evsel *evsel, int cpu_map_idx, int thread)
1565 struct perf_counts_values *count = perf_counts(evsel->counts, cpu_map_idx, thread);
1567 return perf_evsel__read(&evsel->core, cpu_map_idx, thread, count);
1570 static void evsel__set_count(struct evsel *counter, int cpu_map_idx, int thread,
1571 u64 val, u64 ena, u64 run, u64 lost)
1573 struct perf_counts_values *count;
1575 count = perf_counts(counter->counts, cpu_map_idx, thread);
1582 perf_counts__set_loaded(counter->counts, cpu_map_idx, thread, true);
1585 static int evsel__process_group_data(struct evsel *leader, int cpu_map_idx, int thread, u64 *data)
1587 u64 read_format = leader->core.attr.read_format;
1588 struct sample_read_value *v;
1589 u64 nr, ena = 0, run = 0, lost = 0;
1593 if (nr != (u64) leader->core.nr_members)
1596 if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED)
1599 if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING)
1603 sample_read_group__for_each(v, nr, read_format) {
1604 struct evsel *counter;
1606 counter = evlist__id2evsel(leader->evlist, v->id);
1610 if (read_format & PERF_FORMAT_LOST)
1613 evsel__set_count(counter, cpu_map_idx, thread, v->value, ena, run, lost);
1619 static int evsel__read_group(struct evsel *leader, int cpu_map_idx, int thread)
1621 struct perf_stat_evsel *ps = leader->stats;
1622 u64 read_format = leader->core.attr.read_format;
1623 int size = perf_evsel__read_size(&leader->core);
1624 u64 *data = ps->group_data;
1626 if (!(read_format & PERF_FORMAT_ID))
1629 if (!evsel__is_group_leader(leader))
1633 data = zalloc(size);
1637 ps->group_data = data;
1640 if (FD(leader, cpu_map_idx, thread) < 0)
1643 if (readn(FD(leader, cpu_map_idx, thread), data, size) <= 0)
1646 return evsel__process_group_data(leader, cpu_map_idx, thread, data);
1649 int evsel__read_counter(struct evsel *evsel, int cpu_map_idx, int thread)
1651 u64 read_format = evsel->core.attr.read_format;
1653 if (read_format & PERF_FORMAT_GROUP)
1654 return evsel__read_group(evsel, cpu_map_idx, thread);
1656 return evsel__read_one(evsel, cpu_map_idx, thread);
1659 int __evsel__read_on_cpu(struct evsel *evsel, int cpu_map_idx, int thread, bool scale)
1661 struct perf_counts_values count;
1662 size_t nv = scale ? 3 : 1;
1664 if (FD(evsel, cpu_map_idx, thread) < 0)
1667 if (evsel->counts == NULL && evsel__alloc_counts(evsel) < 0)
1670 if (readn(FD(evsel, cpu_map_idx, thread), &count, nv * sizeof(u64)) <= 0)
1673 evsel__compute_deltas(evsel, cpu_map_idx, thread, &count);
1674 perf_counts_values__scale(&count, scale, NULL);
1675 *perf_counts(evsel->counts, cpu_map_idx, thread) = count;
1679 static int evsel__match_other_cpu(struct evsel *evsel, struct evsel *other,
1682 struct perf_cpu cpu;
1684 cpu = perf_cpu_map__cpu(evsel->core.cpus, cpu_map_idx);
1685 return perf_cpu_map__idx(other->core.cpus, cpu);
1688 static int evsel__hybrid_group_cpu_map_idx(struct evsel *evsel, int cpu_map_idx)
1690 struct evsel *leader = evsel__leader(evsel);
1692 if ((evsel__is_hybrid(evsel) && !evsel__is_hybrid(leader)) ||
1693 (!evsel__is_hybrid(evsel) && evsel__is_hybrid(leader))) {
1694 return evsel__match_other_cpu(evsel, leader, cpu_map_idx);
1700 static int get_group_fd(struct evsel *evsel, int cpu_map_idx, int thread)
1702 struct evsel *leader = evsel__leader(evsel);
1705 if (evsel__is_group_leader(evsel))
1709 * Leader must be already processed/open,
1710 * if not it's a bug.
1712 BUG_ON(!leader->core.fd);
1714 cpu_map_idx = evsel__hybrid_group_cpu_map_idx(evsel, cpu_map_idx);
1715 if (cpu_map_idx == -1)
1718 fd = FD(leader, cpu_map_idx, thread);
1724 static void evsel__remove_fd(struct evsel *pos, int nr_cpus, int nr_threads, int thread_idx)
1726 for (int cpu = 0; cpu < nr_cpus; cpu++)
1727 for (int thread = thread_idx; thread < nr_threads - 1; thread++)
1728 FD(pos, cpu, thread) = FD(pos, cpu, thread + 1);
1731 static int update_fds(struct evsel *evsel,
1732 int nr_cpus, int cpu_map_idx,
1733 int nr_threads, int thread_idx)
1737 if (cpu_map_idx >= nr_cpus || thread_idx >= nr_threads)
1740 evlist__for_each_entry(evsel->evlist, pos) {
1741 nr_cpus = pos != evsel ? nr_cpus : cpu_map_idx;
1743 evsel__remove_fd(pos, nr_cpus, nr_threads, thread_idx);
1746 * Since fds for next evsel has not been created,
1747 * there is no need to iterate whole event list.
1755 static bool evsel__ignore_missing_thread(struct evsel *evsel,
1756 int nr_cpus, int cpu_map_idx,
1757 struct perf_thread_map *threads,
1758 int thread, int err)
1760 pid_t ignore_pid = perf_thread_map__pid(threads, thread);
1762 if (!evsel->ignore_missing_thread)
1765 /* The system wide setup does not work with threads. */
1766 if (evsel->core.system_wide)
1769 /* The -ESRCH is perf event syscall errno for pid's not found. */
1773 /* If there's only one thread, let it fail. */
1774 if (threads->nr == 1)
1778 * We should remove fd for missing_thread first
1779 * because thread_map__remove() will decrease threads->nr.
1781 if (update_fds(evsel, nr_cpus, cpu_map_idx, threads->nr, thread))
1784 if (thread_map__remove(threads, thread))
1787 pr_warning("WARNING: Ignored open failure for pid %d\n",
1792 static int __open_attr__fprintf(FILE *fp, const char *name, const char *val,
1793 void *priv __maybe_unused)
1795 return fprintf(fp, " %-32s %s\n", name, val);
1798 static void display_attr(struct perf_event_attr *attr)
1800 if (verbose >= 2 || debug_peo_args) {
1801 fprintf(stderr, "%.60s\n", graph_dotted_line);
1802 fprintf(stderr, "perf_event_attr:\n");
1803 perf_event_attr__fprintf(stderr, attr, __open_attr__fprintf, NULL);
1804 fprintf(stderr, "%.60s\n", graph_dotted_line);
1808 bool evsel__precise_ip_fallback(struct evsel *evsel)
1810 /* Do not try less precise if not requested. */
1811 if (!evsel->precise_max)
1815 * We tried all the precise_ip values, and it's
1816 * still failing, so leave it to standard fallback.
1818 if (!evsel->core.attr.precise_ip) {
1819 evsel->core.attr.precise_ip = evsel->precise_ip_original;
1823 if (!evsel->precise_ip_original)
1824 evsel->precise_ip_original = evsel->core.attr.precise_ip;
1826 evsel->core.attr.precise_ip--;
1827 pr_debug2_peo("decreasing precise_ip by one (%d)\n", evsel->core.attr.precise_ip);
1828 display_attr(&evsel->core.attr);
1832 static struct perf_cpu_map *empty_cpu_map;
1833 static struct perf_thread_map *empty_thread_map;
1835 static int __evsel__prepare_open(struct evsel *evsel, struct perf_cpu_map *cpus,
1836 struct perf_thread_map *threads)
1838 int nthreads = perf_thread_map__nr(threads);
1840 if ((perf_missing_features.write_backward && evsel->core.attr.write_backward) ||
1841 (perf_missing_features.aux_output && evsel->core.attr.aux_output))
1845 if (empty_cpu_map == NULL) {
1846 empty_cpu_map = perf_cpu_map__dummy_new();
1847 if (empty_cpu_map == NULL)
1851 cpus = empty_cpu_map;
1854 if (threads == NULL) {
1855 if (empty_thread_map == NULL) {
1856 empty_thread_map = thread_map__new_by_tid(-1);
1857 if (empty_thread_map == NULL)
1861 threads = empty_thread_map;
1864 if (evsel->core.fd == NULL &&
1865 perf_evsel__alloc_fd(&evsel->core, perf_cpu_map__nr(cpus), nthreads) < 0)
1868 evsel->open_flags = PERF_FLAG_FD_CLOEXEC;
1870 evsel->open_flags |= PERF_FLAG_PID_CGROUP;
1875 static void evsel__disable_missing_features(struct evsel *evsel)
1877 if (perf_missing_features.read_lost)
1878 evsel->core.attr.read_format &= ~PERF_FORMAT_LOST;
1879 if (perf_missing_features.weight_struct) {
1880 evsel__set_sample_bit(evsel, WEIGHT);
1881 evsel__reset_sample_bit(evsel, WEIGHT_STRUCT);
1883 if (perf_missing_features.clockid_wrong)
1884 evsel->core.attr.clockid = CLOCK_MONOTONIC; /* should always work */
1885 if (perf_missing_features.clockid) {
1886 evsel->core.attr.use_clockid = 0;
1887 evsel->core.attr.clockid = 0;
1889 if (perf_missing_features.cloexec)
1890 evsel->open_flags &= ~(unsigned long)PERF_FLAG_FD_CLOEXEC;
1891 if (perf_missing_features.mmap2)
1892 evsel->core.attr.mmap2 = 0;
1893 if (evsel->pmu && evsel->pmu->missing_features.exclude_guest)
1894 evsel->core.attr.exclude_guest = evsel->core.attr.exclude_host = 0;
1895 if (perf_missing_features.lbr_flags)
1896 evsel->core.attr.branch_sample_type &= ~(PERF_SAMPLE_BRANCH_NO_FLAGS |
1897 PERF_SAMPLE_BRANCH_NO_CYCLES);
1898 if (perf_missing_features.group_read && evsel->core.attr.inherit)
1899 evsel->core.attr.read_format &= ~(PERF_FORMAT_GROUP|PERF_FORMAT_ID);
1900 if (perf_missing_features.ksymbol)
1901 evsel->core.attr.ksymbol = 0;
1902 if (perf_missing_features.bpf)
1903 evsel->core.attr.bpf_event = 0;
1904 if (perf_missing_features.branch_hw_idx)
1905 evsel->core.attr.branch_sample_type &= ~PERF_SAMPLE_BRANCH_HW_INDEX;
1906 if (perf_missing_features.sample_id_all)
1907 evsel->core.attr.sample_id_all = 0;
1910 int evsel__prepare_open(struct evsel *evsel, struct perf_cpu_map *cpus,
1911 struct perf_thread_map *threads)
1915 err = __evsel__prepare_open(evsel, cpus, threads);
1919 evsel__disable_missing_features(evsel);
1924 bool evsel__detect_missing_features(struct evsel *evsel)
1927 * Must probe features in the order they were added to the
1928 * perf_event_attr interface.
1930 if (!perf_missing_features.read_lost &&
1931 (evsel->core.attr.read_format & PERF_FORMAT_LOST)) {
1932 perf_missing_features.read_lost = true;
1933 pr_debug2("switching off PERF_FORMAT_LOST support\n");
1935 } else if (!perf_missing_features.weight_struct &&
1936 (evsel->core.attr.sample_type & PERF_SAMPLE_WEIGHT_STRUCT)) {
1937 perf_missing_features.weight_struct = true;
1938 pr_debug2("switching off weight struct support\n");
1940 } else if (!perf_missing_features.code_page_size &&
1941 (evsel->core.attr.sample_type & PERF_SAMPLE_CODE_PAGE_SIZE)) {
1942 perf_missing_features.code_page_size = true;
1943 pr_debug2_peo("Kernel has no PERF_SAMPLE_CODE_PAGE_SIZE support, bailing out\n");
1945 } else if (!perf_missing_features.data_page_size &&
1946 (evsel->core.attr.sample_type & PERF_SAMPLE_DATA_PAGE_SIZE)) {
1947 perf_missing_features.data_page_size = true;
1948 pr_debug2_peo("Kernel has no PERF_SAMPLE_DATA_PAGE_SIZE support, bailing out\n");
1950 } else if (!perf_missing_features.cgroup && evsel->core.attr.cgroup) {
1951 perf_missing_features.cgroup = true;
1952 pr_debug2_peo("Kernel has no cgroup sampling support, bailing out\n");
1954 } else if (!perf_missing_features.branch_hw_idx &&
1955 (evsel->core.attr.branch_sample_type & PERF_SAMPLE_BRANCH_HW_INDEX)) {
1956 perf_missing_features.branch_hw_idx = true;
1957 pr_debug2("switching off branch HW index support\n");
1959 } else if (!perf_missing_features.aux_output && evsel->core.attr.aux_output) {
1960 perf_missing_features.aux_output = true;
1961 pr_debug2_peo("Kernel has no attr.aux_output support, bailing out\n");
1963 } else if (!perf_missing_features.bpf && evsel->core.attr.bpf_event) {
1964 perf_missing_features.bpf = true;
1965 pr_debug2_peo("switching off bpf_event\n");
1967 } else if (!perf_missing_features.ksymbol && evsel->core.attr.ksymbol) {
1968 perf_missing_features.ksymbol = true;
1969 pr_debug2_peo("switching off ksymbol\n");
1971 } else if (!perf_missing_features.write_backward && evsel->core.attr.write_backward) {
1972 perf_missing_features.write_backward = true;
1973 pr_debug2_peo("switching off write_backward\n");
1975 } else if (!perf_missing_features.clockid_wrong && evsel->core.attr.use_clockid) {
1976 perf_missing_features.clockid_wrong = true;
1977 pr_debug2_peo("switching off clockid\n");
1979 } else if (!perf_missing_features.clockid && evsel->core.attr.use_clockid) {
1980 perf_missing_features.clockid = true;
1981 pr_debug2_peo("switching off use_clockid\n");
1983 } else if (!perf_missing_features.cloexec && (evsel->open_flags & PERF_FLAG_FD_CLOEXEC)) {
1984 perf_missing_features.cloexec = true;
1985 pr_debug2_peo("switching off cloexec flag\n");
1987 } else if (!perf_missing_features.mmap2 && evsel->core.attr.mmap2) {
1988 perf_missing_features.mmap2 = true;
1989 pr_debug2_peo("switching off mmap2\n");
1991 } else if (evsel->core.attr.exclude_guest || evsel->core.attr.exclude_host) {
1992 if (evsel->pmu == NULL)
1993 evsel->pmu = evsel__find_pmu(evsel);
1996 evsel->pmu->missing_features.exclude_guest = true;
1998 /* we cannot find PMU, disable attrs now */
1999 evsel->core.attr.exclude_host = false;
2000 evsel->core.attr.exclude_guest = false;
2003 if (evsel->exclude_GH) {
2004 pr_debug2_peo("PMU has no exclude_host/guest support, bailing out\n");
2007 if (!perf_missing_features.exclude_guest) {
2008 perf_missing_features.exclude_guest = true;
2009 pr_debug2_peo("switching off exclude_guest, exclude_host\n");
2012 } else if (!perf_missing_features.sample_id_all) {
2013 perf_missing_features.sample_id_all = true;
2014 pr_debug2_peo("switching off sample_id_all\n");
2016 } else if (!perf_missing_features.lbr_flags &&
2017 (evsel->core.attr.branch_sample_type &
2018 (PERF_SAMPLE_BRANCH_NO_CYCLES |
2019 PERF_SAMPLE_BRANCH_NO_FLAGS))) {
2020 perf_missing_features.lbr_flags = true;
2021 pr_debug2_peo("switching off branch sample type no (cycles/flags)\n");
2023 } else if (!perf_missing_features.group_read &&
2024 evsel->core.attr.inherit &&
2025 (evsel->core.attr.read_format & PERF_FORMAT_GROUP) &&
2026 evsel__is_group_leader(evsel)) {
2027 perf_missing_features.group_read = true;
2028 pr_debug2_peo("switching off group read\n");
2035 bool evsel__increase_rlimit(enum rlimit_action *set_rlimit)
2040 if (*set_rlimit < INCREASED_MAX) {
2043 if (getrlimit(RLIMIT_NOFILE, &l) == 0) {
2044 if (*set_rlimit == NO_CHANGE) {
2045 l.rlim_cur = l.rlim_max;
2047 l.rlim_cur = l.rlim_max + 1000;
2048 l.rlim_max = l.rlim_cur;
2050 if (setrlimit(RLIMIT_NOFILE, &l) == 0) {
2062 static int evsel__open_cpu(struct evsel *evsel, struct perf_cpu_map *cpus,
2063 struct perf_thread_map *threads,
2064 int start_cpu_map_idx, int end_cpu_map_idx)
2066 int idx, thread, nthreads;
2067 int pid = -1, err, old_errno;
2068 enum rlimit_action set_rlimit = NO_CHANGE;
2070 err = __evsel__prepare_open(evsel, cpus, threads);
2075 cpus = empty_cpu_map;
2077 if (threads == NULL)
2078 threads = empty_thread_map;
2080 nthreads = perf_thread_map__nr(threads);
2083 pid = evsel->cgrp->fd;
2085 fallback_missing_features:
2086 evsel__disable_missing_features(evsel);
2088 display_attr(&evsel->core.attr);
2090 for (idx = start_cpu_map_idx; idx < end_cpu_map_idx; idx++) {
2092 for (thread = 0; thread < nthreads; thread++) {
2095 if (thread >= nthreads)
2098 if (!evsel->cgrp && !evsel->core.system_wide)
2099 pid = perf_thread_map__pid(threads, thread);
2101 group_fd = get_group_fd(evsel, idx, thread);
2105 /* Debug message used by test scripts */
2106 pr_debug2_peo("sys_perf_event_open: pid %d cpu %d group_fd %d flags %#lx",
2107 pid, perf_cpu_map__cpu(cpus, idx).cpu, group_fd, evsel->open_flags);
2109 fd = sys_perf_event_open(&evsel->core.attr, pid,
2110 perf_cpu_map__cpu(cpus, idx).cpu,
2111 group_fd, evsel->open_flags);
2113 FD(evsel, idx, thread) = fd;
2118 pr_debug2_peo("\nsys_perf_event_open failed, error %d\n",
2123 bpf_counter__install_pe(evsel, idx, fd);
2125 if (unlikely(test_attr__enabled)) {
2126 test_attr__open(&evsel->core.attr, pid,
2127 perf_cpu_map__cpu(cpus, idx),
2128 fd, group_fd, evsel->open_flags);
2131 /* Debug message used by test scripts */
2132 pr_debug2_peo(" = %d\n", fd);
2134 if (evsel->bpf_fd >= 0) {
2136 int bpf_fd = evsel->bpf_fd;
2139 PERF_EVENT_IOC_SET_BPF,
2141 if (err && errno != EEXIST) {
2142 pr_err("failed to attach bpf fd %d: %s\n",
2143 bpf_fd, strerror(errno));
2149 set_rlimit = NO_CHANGE;
2152 * If we succeeded but had to kill clockid, fail and
2153 * have evsel__open_strerror() print us a nice error.
2155 if (perf_missing_features.clockid ||
2156 perf_missing_features.clockid_wrong) {
2166 if (evsel__precise_ip_fallback(evsel))
2169 if (evsel__ignore_missing_thread(evsel, perf_cpu_map__nr(cpus),
2170 idx, threads, thread, err)) {
2171 /* We just removed 1 thread, so lower the upper nthreads limit. */
2174 /* ... and pretend like nothing have happened. */
2179 * perf stat needs between 5 and 22 fds per CPU. When we run out
2180 * of them try to increase the limits.
2182 if (err == -EMFILE && evsel__increase_rlimit(&set_rlimit))
2185 if (err != -EINVAL || idx > 0 || thread > 0)
2188 if (evsel__detect_missing_features(evsel))
2189 goto fallback_missing_features;
2192 threads->err_thread = thread;
2196 while (--thread >= 0) {
2197 if (FD(evsel, idx, thread) >= 0)
2198 close(FD(evsel, idx, thread));
2199 FD(evsel, idx, thread) = -1;
2202 } while (--idx >= 0);
2207 int evsel__open(struct evsel *evsel, struct perf_cpu_map *cpus,
2208 struct perf_thread_map *threads)
2210 return evsel__open_cpu(evsel, cpus, threads, 0, perf_cpu_map__nr(cpus));
2213 void evsel__close(struct evsel *evsel)
2215 perf_evsel__close(&evsel->core);
2216 perf_evsel__free_id(&evsel->core);
2219 int evsel__open_per_cpu(struct evsel *evsel, struct perf_cpu_map *cpus, int cpu_map_idx)
2221 if (cpu_map_idx == -1)
2222 return evsel__open_cpu(evsel, cpus, NULL, 0, perf_cpu_map__nr(cpus));
2224 return evsel__open_cpu(evsel, cpus, NULL, cpu_map_idx, cpu_map_idx + 1);
2227 int evsel__open_per_thread(struct evsel *evsel, struct perf_thread_map *threads)
2229 return evsel__open(evsel, NULL, threads);
2232 static int perf_evsel__parse_id_sample(const struct evsel *evsel,
2233 const union perf_event *event,
2234 struct perf_sample *sample)
2236 u64 type = evsel->core.attr.sample_type;
2237 const __u64 *array = event->sample.array;
2238 bool swapped = evsel->needs_swap;
2241 array += ((event->header.size -
2242 sizeof(event->header)) / sizeof(u64)) - 1;
2244 if (type & PERF_SAMPLE_IDENTIFIER) {
2245 sample->id = *array;
2249 if (type & PERF_SAMPLE_CPU) {
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]);
2257 sample->cpu = u.val32[0];
2261 if (type & PERF_SAMPLE_STREAM_ID) {
2262 sample->stream_id = *array;
2266 if (type & PERF_SAMPLE_ID) {
2267 sample->id = *array;
2271 if (type & PERF_SAMPLE_TIME) {
2272 sample->time = *array;
2276 if (type & PERF_SAMPLE_TID) {
2279 /* undo swap of u64, then swap on individual u32s */
2280 u.val64 = bswap_64(u.val64);
2281 u.val32[0] = bswap_32(u.val32[0]);
2282 u.val32[1] = bswap_32(u.val32[1]);
2285 sample->pid = u.val32[0];
2286 sample->tid = u.val32[1];
2293 static inline bool overflow(const void *endp, u16 max_size, const void *offset,
2296 return size > max_size || offset + size > endp;
2299 #define OVERFLOW_CHECK(offset, size, max_size) \
2301 if (overflow(endp, (max_size), (offset), (size))) \
2305 #define OVERFLOW_CHECK_u64(offset) \
2306 OVERFLOW_CHECK(offset, sizeof(u64), sizeof(u64))
2309 perf_event__check_size(union perf_event *event, unsigned int sample_size)
2312 * The evsel's sample_size is based on PERF_SAMPLE_MASK which includes
2313 * up to PERF_SAMPLE_PERIOD. After that overflow() must be used to
2314 * check the format does not go past the end of the event.
2316 if (sample_size + sizeof(event->header) > event->header.size)
2322 void __weak arch_perf_parse_sample_weight(struct perf_sample *data,
2324 u64 type __maybe_unused)
2326 data->weight = *array;
2329 u64 evsel__bitfield_swap_branch_flags(u64 value)
2338 * mispred:1 //target mispredicted
2339 * predicted:1 //target predicted
2340 * in_tx:1 //in transaction
2341 * abort:1 //transaction abort
2342 * cycles:16 //cycle count to last branch
2343 * type:4 //branch type
2344 * spec:2 //branch speculation info
2345 * new_type:4 //additional branch type
2346 * priv:3 //privilege level
2351 * Avoid bswap64() the entire branch_flag.value,
2352 * as it has variable bit-field sizes. Instead the
2353 * macro takes the bit-field position/size,
2354 * swaps it based on the host endianness.
2356 if (host_is_bigendian()) {
2357 new_val = bitfield_swap(value, 0, 1);
2358 new_val |= bitfield_swap(value, 1, 1);
2359 new_val |= bitfield_swap(value, 2, 1);
2360 new_val |= bitfield_swap(value, 3, 1);
2361 new_val |= bitfield_swap(value, 4, 16);
2362 new_val |= bitfield_swap(value, 20, 4);
2363 new_val |= bitfield_swap(value, 24, 2);
2364 new_val |= bitfield_swap(value, 26, 4);
2365 new_val |= bitfield_swap(value, 30, 3);
2366 new_val |= bitfield_swap(value, 33, 31);
2368 new_val = bitfield_swap(value, 63, 1);
2369 new_val |= bitfield_swap(value, 62, 1);
2370 new_val |= bitfield_swap(value, 61, 1);
2371 new_val |= bitfield_swap(value, 60, 1);
2372 new_val |= bitfield_swap(value, 44, 16);
2373 new_val |= bitfield_swap(value, 40, 4);
2374 new_val |= bitfield_swap(value, 38, 2);
2375 new_val |= bitfield_swap(value, 34, 4);
2376 new_val |= bitfield_swap(value, 31, 3);
2377 new_val |= bitfield_swap(value, 0, 31);
2383 int evsel__parse_sample(struct evsel *evsel, union perf_event *event,
2384 struct perf_sample *data)
2386 u64 type = evsel->core.attr.sample_type;
2387 bool swapped = evsel->needs_swap;
2389 u16 max_size = event->header.size;
2390 const void *endp = (void *)event + max_size;
2394 * used for cross-endian analysis. See git commit 65014ab3
2395 * for why this goofiness is needed.
2399 memset(data, 0, sizeof(*data));
2400 data->cpu = data->pid = data->tid = -1;
2401 data->stream_id = data->id = data->time = -1ULL;
2402 data->period = evsel->core.attr.sample_period;
2403 data->cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK;
2404 data->misc = event->header.misc;
2406 data->data_src = PERF_MEM_DATA_SRC_NONE;
2409 if (event->header.type != PERF_RECORD_SAMPLE) {
2410 if (!evsel->core.attr.sample_id_all)
2412 return perf_evsel__parse_id_sample(evsel, event, data);
2415 array = event->sample.array;
2417 if (perf_event__check_size(event, evsel->sample_size))
2420 if (type & PERF_SAMPLE_IDENTIFIER) {
2425 if (type & PERF_SAMPLE_IP) {
2430 if (type & PERF_SAMPLE_TID) {
2433 /* undo swap of u64, then swap on individual u32s */
2434 u.val64 = bswap_64(u.val64);
2435 u.val32[0] = bswap_32(u.val32[0]);
2436 u.val32[1] = bswap_32(u.val32[1]);
2439 data->pid = u.val32[0];
2440 data->tid = u.val32[1];
2444 if (type & PERF_SAMPLE_TIME) {
2445 data->time = *array;
2449 if (type & PERF_SAMPLE_ADDR) {
2450 data->addr = *array;
2454 if (type & PERF_SAMPLE_ID) {
2459 if (type & PERF_SAMPLE_STREAM_ID) {
2460 data->stream_id = *array;
2464 if (type & PERF_SAMPLE_CPU) {
2468 /* undo swap of u64, then swap on individual u32s */
2469 u.val64 = bswap_64(u.val64);
2470 u.val32[0] = bswap_32(u.val32[0]);
2473 data->cpu = u.val32[0];
2477 if (type & PERF_SAMPLE_PERIOD) {
2478 data->period = *array;
2482 if (type & PERF_SAMPLE_READ) {
2483 u64 read_format = evsel->core.attr.read_format;
2485 OVERFLOW_CHECK_u64(array);
2486 if (read_format & PERF_FORMAT_GROUP)
2487 data->read.group.nr = *array;
2489 data->read.one.value = *array;
2493 if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED) {
2494 OVERFLOW_CHECK_u64(array);
2495 data->read.time_enabled = *array;
2499 if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING) {
2500 OVERFLOW_CHECK_u64(array);
2501 data->read.time_running = *array;
2505 /* PERF_FORMAT_ID is forced for PERF_SAMPLE_READ */
2506 if (read_format & PERF_FORMAT_GROUP) {
2507 const u64 max_group_nr = UINT64_MAX /
2508 sizeof(struct sample_read_value);
2510 if (data->read.group.nr > max_group_nr)
2513 sz = data->read.group.nr * sample_read_value_size(read_format);
2514 OVERFLOW_CHECK(array, sz, max_size);
2515 data->read.group.values =
2516 (struct sample_read_value *)array;
2517 array = (void *)array + sz;
2519 OVERFLOW_CHECK_u64(array);
2520 data->read.one.id = *array;
2523 if (read_format & PERF_FORMAT_LOST) {
2524 OVERFLOW_CHECK_u64(array);
2525 data->read.one.lost = *array;
2531 if (type & PERF_SAMPLE_CALLCHAIN) {
2532 const u64 max_callchain_nr = UINT64_MAX / sizeof(u64);
2534 OVERFLOW_CHECK_u64(array);
2535 data->callchain = (struct ip_callchain *)array++;
2536 if (data->callchain->nr > max_callchain_nr)
2538 sz = data->callchain->nr * sizeof(u64);
2539 OVERFLOW_CHECK(array, sz, max_size);
2540 array = (void *)array + sz;
2543 if (type & PERF_SAMPLE_RAW) {
2544 OVERFLOW_CHECK_u64(array);
2548 * Undo swap of u64, then swap on individual u32s,
2549 * get the size of the raw area and undo all of the
2550 * swap. The pevent interface handles endianness by
2554 u.val64 = bswap_64(u.val64);
2555 u.val32[0] = bswap_32(u.val32[0]);
2556 u.val32[1] = bswap_32(u.val32[1]);
2558 data->raw_size = u.val32[0];
2561 * The raw data is aligned on 64bits including the
2562 * u32 size, so it's safe to use mem_bswap_64.
2565 mem_bswap_64((void *) array, data->raw_size);
2567 array = (void *)array + sizeof(u32);
2569 OVERFLOW_CHECK(array, data->raw_size, max_size);
2570 data->raw_data = (void *)array;
2571 array = (void *)array + data->raw_size;
2574 if (type & PERF_SAMPLE_BRANCH_STACK) {
2575 const u64 max_branch_nr = UINT64_MAX /
2576 sizeof(struct branch_entry);
2577 struct branch_entry *e;
2580 OVERFLOW_CHECK_u64(array);
2581 data->branch_stack = (struct branch_stack *)array++;
2583 if (data->branch_stack->nr > max_branch_nr)
2586 sz = data->branch_stack->nr * sizeof(struct branch_entry);
2587 if (evsel__has_branch_hw_idx(evsel)) {
2589 e = &data->branch_stack->entries[0];
2591 data->no_hw_idx = true;
2593 * if the PERF_SAMPLE_BRANCH_HW_INDEX is not applied,
2594 * only nr and entries[] will be output by kernel.
2596 e = (struct branch_entry *)&data->branch_stack->hw_idx;
2601 * struct branch_flag does not have endian
2602 * specific bit field definition. And bswap
2603 * will not resolve the issue, since these
2606 * evsel__bitfield_swap_branch_flags() uses a
2607 * bitfield_swap macro to swap the bit position
2608 * based on the host endians.
2610 for (i = 0; i < data->branch_stack->nr; i++, e++)
2611 e->flags.value = evsel__bitfield_swap_branch_flags(e->flags.value);
2614 OVERFLOW_CHECK(array, sz, max_size);
2615 array = (void *)array + sz;
2618 if (type & PERF_SAMPLE_REGS_USER) {
2619 OVERFLOW_CHECK_u64(array);
2620 data->user_regs.abi = *array;
2623 if (data->user_regs.abi) {
2624 u64 mask = evsel->core.attr.sample_regs_user;
2626 sz = hweight64(mask) * sizeof(u64);
2627 OVERFLOW_CHECK(array, sz, max_size);
2628 data->user_regs.mask = mask;
2629 data->user_regs.regs = (u64 *)array;
2630 array = (void *)array + sz;
2634 if (type & PERF_SAMPLE_STACK_USER) {
2635 OVERFLOW_CHECK_u64(array);
2638 data->user_stack.offset = ((char *)(array - 1)
2642 data->user_stack.size = 0;
2644 OVERFLOW_CHECK(array, sz, max_size);
2645 data->user_stack.data = (char *)array;
2646 array = (void *)array + sz;
2647 OVERFLOW_CHECK_u64(array);
2648 data->user_stack.size = *array++;
2649 if (WARN_ONCE(data->user_stack.size > sz,
2650 "user stack dump failure\n"))
2655 if (type & PERF_SAMPLE_WEIGHT_TYPE) {
2656 OVERFLOW_CHECK_u64(array);
2657 arch_perf_parse_sample_weight(data, array, type);
2661 if (type & PERF_SAMPLE_DATA_SRC) {
2662 OVERFLOW_CHECK_u64(array);
2663 data->data_src = *array;
2667 if (type & PERF_SAMPLE_TRANSACTION) {
2668 OVERFLOW_CHECK_u64(array);
2669 data->transaction = *array;
2673 data->intr_regs.abi = PERF_SAMPLE_REGS_ABI_NONE;
2674 if (type & PERF_SAMPLE_REGS_INTR) {
2675 OVERFLOW_CHECK_u64(array);
2676 data->intr_regs.abi = *array;
2679 if (data->intr_regs.abi != PERF_SAMPLE_REGS_ABI_NONE) {
2680 u64 mask = evsel->core.attr.sample_regs_intr;
2682 sz = hweight64(mask) * sizeof(u64);
2683 OVERFLOW_CHECK(array, sz, max_size);
2684 data->intr_regs.mask = mask;
2685 data->intr_regs.regs = (u64 *)array;
2686 array = (void *)array + sz;
2690 data->phys_addr = 0;
2691 if (type & PERF_SAMPLE_PHYS_ADDR) {
2692 data->phys_addr = *array;
2697 if (type & PERF_SAMPLE_CGROUP) {
2698 data->cgroup = *array;
2702 data->data_page_size = 0;
2703 if (type & PERF_SAMPLE_DATA_PAGE_SIZE) {
2704 data->data_page_size = *array;
2708 data->code_page_size = 0;
2709 if (type & PERF_SAMPLE_CODE_PAGE_SIZE) {
2710 data->code_page_size = *array;
2714 if (type & PERF_SAMPLE_AUX) {
2715 OVERFLOW_CHECK_u64(array);
2718 OVERFLOW_CHECK(array, sz, max_size);
2719 /* Undo swap of data */
2721 mem_bswap_64((char *)array, sz);
2722 data->aux_sample.size = sz;
2723 data->aux_sample.data = (char *)array;
2724 array = (void *)array + sz;
2730 int evsel__parse_sample_timestamp(struct evsel *evsel, union perf_event *event,
2733 u64 type = evsel->core.attr.sample_type;
2736 if (!(type & PERF_SAMPLE_TIME))
2739 if (event->header.type != PERF_RECORD_SAMPLE) {
2740 struct perf_sample data = {
2744 if (!evsel->core.attr.sample_id_all)
2746 if (perf_evsel__parse_id_sample(evsel, event, &data))
2749 *timestamp = data.time;
2753 array = event->sample.array;
2755 if (perf_event__check_size(event, evsel->sample_size))
2758 if (type & PERF_SAMPLE_IDENTIFIER)
2761 if (type & PERF_SAMPLE_IP)
2764 if (type & PERF_SAMPLE_TID)
2767 if (type & PERF_SAMPLE_TIME)
2768 *timestamp = *array;
2773 u16 evsel__id_hdr_size(struct evsel *evsel)
2775 u64 sample_type = evsel->core.attr.sample_type;
2778 if (sample_type & PERF_SAMPLE_TID)
2779 size += sizeof(u64);
2781 if (sample_type & PERF_SAMPLE_TIME)
2782 size += sizeof(u64);
2784 if (sample_type & PERF_SAMPLE_ID)
2785 size += sizeof(u64);
2787 if (sample_type & PERF_SAMPLE_STREAM_ID)
2788 size += sizeof(u64);
2790 if (sample_type & PERF_SAMPLE_CPU)
2791 size += sizeof(u64);
2793 if (sample_type & PERF_SAMPLE_IDENTIFIER)
2794 size += sizeof(u64);
2799 #ifdef HAVE_LIBTRACEEVENT
2800 struct tep_format_field *evsel__field(struct evsel *evsel, const char *name)
2802 return tep_find_field(evsel->tp_format, name);
2805 void *evsel__rawptr(struct evsel *evsel, struct perf_sample *sample, const char *name)
2807 struct tep_format_field *field = evsel__field(evsel, name);
2813 offset = field->offset;
2815 if (field->flags & TEP_FIELD_IS_DYNAMIC) {
2816 offset = *(int *)(sample->raw_data + field->offset);
2818 if (tep_field_is_relative(field->flags))
2819 offset += field->offset + field->size;
2822 return sample->raw_data + offset;
2825 u64 format_field__intval(struct tep_format_field *field, struct perf_sample *sample,
2829 void *ptr = sample->raw_data + field->offset;
2831 switch (field->size) {
2835 value = *(u16 *)ptr;
2838 value = *(u32 *)ptr;
2841 memcpy(&value, ptr, sizeof(u64));
2850 switch (field->size) {
2852 return bswap_16(value);
2854 return bswap_32(value);
2856 return bswap_64(value);
2864 u64 evsel__intval(struct evsel *evsel, struct perf_sample *sample, const char *name)
2866 struct tep_format_field *field = evsel__field(evsel, name);
2871 return field ? format_field__intval(field, sample, evsel->needs_swap) : 0;
2875 bool evsel__fallback(struct evsel *evsel, int err, char *msg, size_t msgsize)
2879 if ((err == ENOENT || err == ENXIO || err == ENODEV) &&
2880 evsel->core.attr.type == PERF_TYPE_HARDWARE &&
2881 evsel->core.attr.config == PERF_COUNT_HW_CPU_CYCLES) {
2883 * If it's cycles then fall back to hrtimer based
2884 * cpu-clock-tick sw counter, which is always available even if
2887 * PPC returns ENXIO until 2.6.37 (behavior changed with commit
2890 scnprintf(msg, msgsize, "%s",
2891 "The cycles event is not supported, trying to fall back to cpu-clock-ticks");
2893 evsel->core.attr.type = PERF_TYPE_SOFTWARE;
2894 evsel->core.attr.config = PERF_COUNT_SW_CPU_CLOCK;
2896 zfree(&evsel->name);
2898 } else if (err == EACCES && !evsel->core.attr.exclude_kernel &&
2899 (paranoid = perf_event_paranoid()) > 1) {
2900 const char *name = evsel__name(evsel);
2902 const char *sep = ":";
2904 /* If event has exclude user then don't exclude kernel. */
2905 if (evsel->core.attr.exclude_user)
2908 /* Is there already the separator in the name. */
2909 if (strchr(name, '/') ||
2910 (strchr(name, ':') && !evsel->is_libpfm_event))
2913 if (asprintf(&new_name, "%s%su", name, sep) < 0)
2918 evsel->name = new_name;
2919 scnprintf(msg, msgsize, "kernel.perf_event_paranoid=%d, trying "
2920 "to fall back to excluding kernel and hypervisor "
2921 " samples", paranoid);
2922 evsel->core.attr.exclude_kernel = 1;
2923 evsel->core.attr.exclude_hv = 1;
2931 static bool find_process(const char *name)
2933 size_t len = strlen(name);
2938 dir = opendir(procfs__mountpoint());
2942 /* Walk through the directory. */
2943 while (ret && (d = readdir(dir)) != NULL) {
2944 char path[PATH_MAX];
2948 if ((d->d_type != DT_DIR) ||
2949 !strcmp(".", d->d_name) ||
2950 !strcmp("..", d->d_name))
2953 scnprintf(path, sizeof(path), "%s/%s/comm",
2954 procfs__mountpoint(), d->d_name);
2956 if (filename__read_str(path, &data, &size))
2959 ret = strncmp(name, data, len);
2964 return ret ? false : true;
2967 static bool is_amd(const char *arch, const char *cpuid)
2969 return arch && !strcmp("x86", arch) && cpuid && strstarts(cpuid, "AuthenticAMD");
2972 static bool is_amd_ibs(struct evsel *evsel)
2974 return evsel->core.attr.precise_ip
2975 || (evsel->pmu_name && !strncmp(evsel->pmu_name, "ibs", 3));
2978 int evsel__open_strerror(struct evsel *evsel, struct target *target,
2979 int err, char *msg, size_t size)
2981 struct perf_env *env = evsel__env(evsel);
2982 const char *arch = perf_env__arch(env);
2983 const char *cpuid = perf_env__cpuid(env);
2984 char sbuf[STRERR_BUFSIZE];
2985 int printed = 0, enforced = 0;
2990 printed += scnprintf(msg + printed, size - printed,
2991 "Access to performance monitoring and observability operations is limited.\n");
2993 if (!sysfs__read_int("fs/selinux/enforce", &enforced)) {
2995 printed += scnprintf(msg + printed, size - printed,
2996 "Enforced MAC policy settings (SELinux) can limit access to performance\n"
2997 "monitoring and observability operations. Inspect system audit records for\n"
2998 "more perf_event access control information and adjusting the policy.\n");
3003 printed += scnprintf(msg, size,
3004 "No permission to enable %s event.\n\n", evsel__name(evsel));
3006 return scnprintf(msg + printed, size - printed,
3007 "Consider adjusting /proc/sys/kernel/perf_event_paranoid setting to open\n"
3008 "access to performance monitoring and observability operations for processes\n"
3009 "without CAP_PERFMON, CAP_SYS_PTRACE or CAP_SYS_ADMIN Linux capability.\n"
3010 "More information can be found at 'Perf events and tool security' document:\n"
3011 "https://www.kernel.org/doc/html/latest/admin-guide/perf-security.html\n"
3012 "perf_event_paranoid setting is %d:\n"
3013 " -1: Allow use of (almost) all events by all users\n"
3014 " Ignore mlock limit after perf_event_mlock_kb without CAP_IPC_LOCK\n"
3015 ">= 0: Disallow raw and ftrace function tracepoint access\n"
3016 ">= 1: Disallow CPU event access\n"
3017 ">= 2: Disallow kernel profiling\n"
3018 "To make the adjusted perf_event_paranoid setting permanent preserve it\n"
3019 "in /etc/sysctl.conf (e.g. kernel.perf_event_paranoid = <setting>)",
3020 perf_event_paranoid());
3022 return scnprintf(msg, size, "The %s event is not supported.", evsel__name(evsel));
3024 return scnprintf(msg, size, "%s",
3025 "Too many events are opened.\n"
3026 "Probably the maximum number of open file descriptors has been reached.\n"
3027 "Hint: Try again after reducing the number of events.\n"
3028 "Hint: Try increasing the limit with 'ulimit -n <limit>'");
3030 if (evsel__has_callchain(evsel) &&
3031 access("/proc/sys/kernel/perf_event_max_stack", F_OK) == 0)
3032 return scnprintf(msg, size,
3033 "Not enough memory to setup event with callchain.\n"
3034 "Hint: Try tweaking /proc/sys/kernel/perf_event_max_stack\n"
3035 "Hint: Current value: %d", sysctl__max_stack());
3038 if (target->cpu_list)
3039 return scnprintf(msg, size, "%s",
3040 "No such device - did you specify an out-of-range profile CPU?");
3043 if (evsel->core.attr.sample_type & PERF_SAMPLE_BRANCH_STACK)
3044 return scnprintf(msg, size,
3045 "%s: PMU Hardware or event type doesn't support branch stack sampling.",
3046 evsel__name(evsel));
3047 if (evsel->core.attr.aux_output)
3048 return scnprintf(msg, size,
3049 "%s: PMU Hardware doesn't support 'aux_output' feature",
3050 evsel__name(evsel));
3051 if (evsel->core.attr.sample_period != 0)
3052 return scnprintf(msg, size,
3053 "%s: PMU Hardware doesn't support sampling/overflow-interrupts. Try 'perf stat'",
3054 evsel__name(evsel));
3055 if (evsel->core.attr.precise_ip)
3056 return scnprintf(msg, size, "%s",
3057 "\'precise\' request may not be supported. Try removing 'p' modifier.");
3058 #if defined(__i386__) || defined(__x86_64__)
3059 if (evsel->core.attr.type == PERF_TYPE_HARDWARE)
3060 return scnprintf(msg, size, "%s",
3061 "No hardware sampling interrupt available.\n");
3065 if (find_process("oprofiled"))
3066 return scnprintf(msg, size,
3067 "The PMU counters are busy/taken by another profiler.\n"
3068 "We found oprofile daemon running, please stop it and try again.");
3071 if (evsel->core.attr.sample_type & PERF_SAMPLE_CODE_PAGE_SIZE && perf_missing_features.code_page_size)
3072 return scnprintf(msg, size, "Asking for the code page size isn't supported by this kernel.");
3073 if (evsel->core.attr.sample_type & PERF_SAMPLE_DATA_PAGE_SIZE && perf_missing_features.data_page_size)
3074 return scnprintf(msg, size, "Asking for the data page size isn't supported by this kernel.");
3075 if (evsel->core.attr.write_backward && perf_missing_features.write_backward)
3076 return scnprintf(msg, size, "Reading from overwrite event is not supported by this kernel.");
3077 if (perf_missing_features.clockid)
3078 return scnprintf(msg, size, "clockid feature not supported.");
3079 if (perf_missing_features.clockid_wrong)
3080 return scnprintf(msg, size, "wrong clockid (%d).", clockid);
3081 if (perf_missing_features.aux_output)
3082 return scnprintf(msg, size, "The 'aux_output' feature is not supported, update the kernel.");
3083 if (!target__has_cpu(target))
3084 return scnprintf(msg, size,
3085 "Invalid event (%s) in per-thread mode, enable system wide with '-a'.",
3086 evsel__name(evsel));
3087 if (is_amd(arch, cpuid)) {
3088 if (is_amd_ibs(evsel)) {
3089 if (evsel->core.attr.exclude_kernel)
3090 return scnprintf(msg, size,
3091 "AMD IBS can't exclude kernel events. Try running at a higher privilege level.");
3092 if (!evsel->core.system_wide)
3093 return scnprintf(msg, size,
3094 "AMD IBS may only be available in system-wide/per-cpu mode. Try using -a, or -C and workload affinity");
3100 return scnprintf(msg, size, "Cannot collect data source with the load latency event alone. "
3101 "Please add an auxiliary event in front of the load latency event.");
3106 return scnprintf(msg, size,
3107 "The sys_perf_event_open() syscall returned with %d (%s) for event (%s).\n"
3108 "/bin/dmesg | grep -i perf may provide additional information.\n",
3109 err, str_error_r(err, sbuf, sizeof(sbuf)), evsel__name(evsel));
3112 struct perf_env *evsel__env(struct evsel *evsel)
3114 if (evsel && evsel->evlist && evsel->evlist->env)
3115 return evsel->evlist->env;
3119 static int store_evsel_ids(struct evsel *evsel, struct evlist *evlist)
3121 int cpu_map_idx, thread;
3123 for (cpu_map_idx = 0; cpu_map_idx < xyarray__max_x(evsel->core.fd); cpu_map_idx++) {
3124 for (thread = 0; thread < xyarray__max_y(evsel->core.fd);
3126 int fd = FD(evsel, cpu_map_idx, thread);
3128 if (perf_evlist__id_add_fd(&evlist->core, &evsel->core,
3129 cpu_map_idx, thread, fd) < 0)
3137 int evsel__store_ids(struct evsel *evsel, struct evlist *evlist)
3139 struct perf_cpu_map *cpus = evsel->core.cpus;
3140 struct perf_thread_map *threads = evsel->core.threads;
3142 if (perf_evsel__alloc_id(&evsel->core, perf_cpu_map__nr(cpus), threads->nr))
3145 return store_evsel_ids(evsel, evlist);
3148 void evsel__zero_per_pkg(struct evsel *evsel)
3150 struct hashmap_entry *cur;
3153 if (evsel->per_pkg_mask) {
3154 hashmap__for_each_entry(evsel->per_pkg_mask, cur, bkt)
3155 free((void *)cur->pkey);
3157 hashmap__clear(evsel->per_pkg_mask);
3161 bool evsel__is_hybrid(const struct evsel *evsel)
3163 return evsel->pmu_name && perf_pmu__is_hybrid(evsel->pmu_name);
3166 struct evsel *evsel__leader(const struct evsel *evsel)
3168 return container_of(evsel->core.leader, struct evsel, core);
3171 bool evsel__has_leader(struct evsel *evsel, struct evsel *leader)
3173 return evsel->core.leader == &leader->core;
3176 bool evsel__is_leader(struct evsel *evsel)
3178 return evsel__has_leader(evsel, evsel);
3181 void evsel__set_leader(struct evsel *evsel, struct evsel *leader)
3183 evsel->core.leader = &leader->core;
3186 int evsel__source_count(const struct evsel *evsel)
3191 evlist__for_each_entry(evsel->evlist, pos) {
3192 if (pos->metric_leader == evsel)
3198 bool __weak arch_evsel__must_be_in_group(const struct evsel *evsel __maybe_unused)
3204 * Remove an event from a given group (leader).
3205 * Some events, e.g., perf metrics Topdown events,
3206 * must always be grouped. Ignore the events.
3208 void evsel__remove_from_group(struct evsel *evsel, struct evsel *leader)
3210 if (!arch_evsel__must_be_in_group(evsel) && evsel != leader) {
3211 evsel__set_leader(evsel, evsel);
3212 evsel->core.nr_members = 0;
3213 leader->core.nr_members--;