2 * Copyright (C) 2011, Red Hat Inc, Arnaldo Carvalho de Melo <acme@redhat.com>
4 * Parts came from builtin-{top,stat,record}.c, see those files for further
7 * Released under the GPL v2. (and only v2, not any later version)
11 #include <linux/bitops.h>
12 #include <api/fs/tracing_path.h>
13 #include <traceevent/event-parse.h>
14 #include <linux/hw_breakpoint.h>
15 #include <linux/perf_event.h>
16 #include <linux/err.h>
17 #include <sys/resource.h>
19 #include "callchain.h"
25 #include "thread_map.h"
27 #include "perf_regs.h"
29 #include "trace-event.h"
39 } perf_missing_features;
41 static clockid_t clockid;
43 static int perf_evsel__no_extra_init(struct perf_evsel *evsel __maybe_unused)
48 static void perf_evsel__no_extra_fini(struct perf_evsel *evsel __maybe_unused)
54 int (*init)(struct perf_evsel *evsel);
55 void (*fini)(struct perf_evsel *evsel);
56 } perf_evsel__object = {
57 .size = sizeof(struct perf_evsel),
58 .init = perf_evsel__no_extra_init,
59 .fini = perf_evsel__no_extra_fini,
62 int perf_evsel__object_config(size_t object_size,
63 int (*init)(struct perf_evsel *evsel),
64 void (*fini)(struct perf_evsel *evsel))
70 if (perf_evsel__object.size > object_size)
73 perf_evsel__object.size = object_size;
77 perf_evsel__object.init = init;
80 perf_evsel__object.fini = fini;
85 #define FD(e, x, y) (*(int *)xyarray__entry(e->fd, x, y))
87 int __perf_evsel__sample_size(u64 sample_type)
89 u64 mask = sample_type & PERF_SAMPLE_MASK;
93 for (i = 0; i < 64; i++) {
94 if (mask & (1ULL << i))
104 * __perf_evsel__calc_id_pos - calculate id_pos.
105 * @sample_type: sample type
107 * This function returns the position of the event id (PERF_SAMPLE_ID or
108 * PERF_SAMPLE_IDENTIFIER) in a sample event i.e. in the array of struct
111 static int __perf_evsel__calc_id_pos(u64 sample_type)
115 if (sample_type & PERF_SAMPLE_IDENTIFIER)
118 if (!(sample_type & PERF_SAMPLE_ID))
121 if (sample_type & PERF_SAMPLE_IP)
124 if (sample_type & PERF_SAMPLE_TID)
127 if (sample_type & PERF_SAMPLE_TIME)
130 if (sample_type & PERF_SAMPLE_ADDR)
137 * __perf_evsel__calc_is_pos - calculate is_pos.
138 * @sample_type: sample type
140 * This function returns the position (counting backwards) of the event id
141 * (PERF_SAMPLE_ID or PERF_SAMPLE_IDENTIFIER) in a non-sample event i.e. if
142 * sample_id_all is used there is an id sample appended to non-sample events.
144 static int __perf_evsel__calc_is_pos(u64 sample_type)
148 if (sample_type & PERF_SAMPLE_IDENTIFIER)
151 if (!(sample_type & PERF_SAMPLE_ID))
154 if (sample_type & PERF_SAMPLE_CPU)
157 if (sample_type & PERF_SAMPLE_STREAM_ID)
163 void perf_evsel__calc_id_pos(struct perf_evsel *evsel)
165 evsel->id_pos = __perf_evsel__calc_id_pos(evsel->attr.sample_type);
166 evsel->is_pos = __perf_evsel__calc_is_pos(evsel->attr.sample_type);
169 void __perf_evsel__set_sample_bit(struct perf_evsel *evsel,
170 enum perf_event_sample_format bit)
172 if (!(evsel->attr.sample_type & bit)) {
173 evsel->attr.sample_type |= bit;
174 evsel->sample_size += sizeof(u64);
175 perf_evsel__calc_id_pos(evsel);
179 void __perf_evsel__reset_sample_bit(struct perf_evsel *evsel,
180 enum perf_event_sample_format bit)
182 if (evsel->attr.sample_type & bit) {
183 evsel->attr.sample_type &= ~bit;
184 evsel->sample_size -= sizeof(u64);
185 perf_evsel__calc_id_pos(evsel);
189 void perf_evsel__set_sample_id(struct perf_evsel *evsel,
190 bool can_sample_identifier)
192 if (can_sample_identifier) {
193 perf_evsel__reset_sample_bit(evsel, ID);
194 perf_evsel__set_sample_bit(evsel, IDENTIFIER);
196 perf_evsel__set_sample_bit(evsel, ID);
198 evsel->attr.read_format |= PERF_FORMAT_ID;
201 void perf_evsel__init(struct perf_evsel *evsel,
202 struct perf_event_attr *attr, int idx)
205 evsel->tracking = !idx;
207 evsel->leader = evsel;
210 evsel->evlist = NULL;
211 INIT_LIST_HEAD(&evsel->node);
212 INIT_LIST_HEAD(&evsel->config_terms);
213 perf_evsel__object.init(evsel);
214 evsel->sample_size = __perf_evsel__sample_size(attr->sample_type);
215 perf_evsel__calc_id_pos(evsel);
216 evsel->cmdline_group_boundary = false;
219 struct perf_evsel *perf_evsel__new_idx(struct perf_event_attr *attr, int idx)
221 struct perf_evsel *evsel = zalloc(perf_evsel__object.size);
224 perf_evsel__init(evsel, attr, idx);
230 * Returns pointer with encoded error via <linux/err.h> interface.
232 struct perf_evsel *perf_evsel__newtp_idx(const char *sys, const char *name, int idx)
234 struct perf_evsel *evsel = zalloc(perf_evsel__object.size);
240 struct perf_event_attr attr = {
241 .type = PERF_TYPE_TRACEPOINT,
242 .sample_type = (PERF_SAMPLE_RAW | PERF_SAMPLE_TIME |
243 PERF_SAMPLE_CPU | PERF_SAMPLE_PERIOD),
246 if (asprintf(&evsel->name, "%s:%s", sys, name) < 0)
249 evsel->tp_format = trace_event__tp_format(sys, name);
250 if (IS_ERR(evsel->tp_format)) {
251 err = PTR_ERR(evsel->tp_format);
255 event_attr_init(&attr);
256 attr.config = evsel->tp_format->id;
257 attr.sample_period = 1;
258 perf_evsel__init(evsel, &attr, idx);
270 const char *perf_evsel__hw_names[PERF_COUNT_HW_MAX] = {
278 "stalled-cycles-frontend",
279 "stalled-cycles-backend",
283 static const char *__perf_evsel__hw_name(u64 config)
285 if (config < PERF_COUNT_HW_MAX && perf_evsel__hw_names[config])
286 return perf_evsel__hw_names[config];
288 return "unknown-hardware";
291 static int perf_evsel__add_modifiers(struct perf_evsel *evsel, char *bf, size_t size)
293 int colon = 0, r = 0;
294 struct perf_event_attr *attr = &evsel->attr;
295 bool exclude_guest_default = false;
297 #define MOD_PRINT(context, mod) do { \
298 if (!attr->exclude_##context) { \
299 if (!colon) colon = ++r; \
300 r += scnprintf(bf + r, size - r, "%c", mod); \
303 if (attr->exclude_kernel || attr->exclude_user || attr->exclude_hv) {
304 MOD_PRINT(kernel, 'k');
305 MOD_PRINT(user, 'u');
307 exclude_guest_default = true;
310 if (attr->precise_ip) {
313 r += scnprintf(bf + r, size - r, "%.*s", attr->precise_ip, "ppp");
314 exclude_guest_default = true;
317 if (attr->exclude_host || attr->exclude_guest == exclude_guest_default) {
318 MOD_PRINT(host, 'H');
319 MOD_PRINT(guest, 'G');
327 static int perf_evsel__hw_name(struct perf_evsel *evsel, char *bf, size_t size)
329 int r = scnprintf(bf, size, "%s", __perf_evsel__hw_name(evsel->attr.config));
330 return r + perf_evsel__add_modifiers(evsel, bf + r, size - r);
333 const char *perf_evsel__sw_names[PERF_COUNT_SW_MAX] = {
346 static const char *__perf_evsel__sw_name(u64 config)
348 if (config < PERF_COUNT_SW_MAX && perf_evsel__sw_names[config])
349 return perf_evsel__sw_names[config];
350 return "unknown-software";
353 static int perf_evsel__sw_name(struct perf_evsel *evsel, char *bf, size_t size)
355 int r = scnprintf(bf, size, "%s", __perf_evsel__sw_name(evsel->attr.config));
356 return r + perf_evsel__add_modifiers(evsel, bf + r, size - r);
359 static int __perf_evsel__bp_name(char *bf, size_t size, u64 addr, u64 type)
363 r = scnprintf(bf, size, "mem:0x%" PRIx64 ":", addr);
365 if (type & HW_BREAKPOINT_R)
366 r += scnprintf(bf + r, size - r, "r");
368 if (type & HW_BREAKPOINT_W)
369 r += scnprintf(bf + r, size - r, "w");
371 if (type & HW_BREAKPOINT_X)
372 r += scnprintf(bf + r, size - r, "x");
377 static int perf_evsel__bp_name(struct perf_evsel *evsel, char *bf, size_t size)
379 struct perf_event_attr *attr = &evsel->attr;
380 int r = __perf_evsel__bp_name(bf, size, attr->bp_addr, attr->bp_type);
381 return r + perf_evsel__add_modifiers(evsel, bf + r, size - r);
384 const char *perf_evsel__hw_cache[PERF_COUNT_HW_CACHE_MAX]
385 [PERF_EVSEL__MAX_ALIASES] = {
386 { "L1-dcache", "l1-d", "l1d", "L1-data", },
387 { "L1-icache", "l1-i", "l1i", "L1-instruction", },
389 { "dTLB", "d-tlb", "Data-TLB", },
390 { "iTLB", "i-tlb", "Instruction-TLB", },
391 { "branch", "branches", "bpu", "btb", "bpc", },
395 const char *perf_evsel__hw_cache_op[PERF_COUNT_HW_CACHE_OP_MAX]
396 [PERF_EVSEL__MAX_ALIASES] = {
397 { "load", "loads", "read", },
398 { "store", "stores", "write", },
399 { "prefetch", "prefetches", "speculative-read", "speculative-load", },
402 const char *perf_evsel__hw_cache_result[PERF_COUNT_HW_CACHE_RESULT_MAX]
403 [PERF_EVSEL__MAX_ALIASES] = {
404 { "refs", "Reference", "ops", "access", },
405 { "misses", "miss", },
408 #define C(x) PERF_COUNT_HW_CACHE_##x
409 #define CACHE_READ (1 << C(OP_READ))
410 #define CACHE_WRITE (1 << C(OP_WRITE))
411 #define CACHE_PREFETCH (1 << C(OP_PREFETCH))
412 #define COP(x) (1 << x)
415 * cache operartion stat
416 * L1I : Read and prefetch only
417 * ITLB and BPU : Read-only
419 static unsigned long perf_evsel__hw_cache_stat[C(MAX)] = {
420 [C(L1D)] = (CACHE_READ | CACHE_WRITE | CACHE_PREFETCH),
421 [C(L1I)] = (CACHE_READ | CACHE_PREFETCH),
422 [C(LL)] = (CACHE_READ | CACHE_WRITE | CACHE_PREFETCH),
423 [C(DTLB)] = (CACHE_READ | CACHE_WRITE | CACHE_PREFETCH),
424 [C(ITLB)] = (CACHE_READ),
425 [C(BPU)] = (CACHE_READ),
426 [C(NODE)] = (CACHE_READ | CACHE_WRITE | CACHE_PREFETCH),
429 bool perf_evsel__is_cache_op_valid(u8 type, u8 op)
431 if (perf_evsel__hw_cache_stat[type] & COP(op))
432 return true; /* valid */
434 return false; /* invalid */
437 int __perf_evsel__hw_cache_type_op_res_name(u8 type, u8 op, u8 result,
438 char *bf, size_t size)
441 return scnprintf(bf, size, "%s-%s-%s", perf_evsel__hw_cache[type][0],
442 perf_evsel__hw_cache_op[op][0],
443 perf_evsel__hw_cache_result[result][0]);
446 return scnprintf(bf, size, "%s-%s", perf_evsel__hw_cache[type][0],
447 perf_evsel__hw_cache_op[op][1]);
450 static int __perf_evsel__hw_cache_name(u64 config, char *bf, size_t size)
452 u8 op, result, type = (config >> 0) & 0xff;
453 const char *err = "unknown-ext-hardware-cache-type";
455 if (type > PERF_COUNT_HW_CACHE_MAX)
458 op = (config >> 8) & 0xff;
459 err = "unknown-ext-hardware-cache-op";
460 if (op > PERF_COUNT_HW_CACHE_OP_MAX)
463 result = (config >> 16) & 0xff;
464 err = "unknown-ext-hardware-cache-result";
465 if (result > PERF_COUNT_HW_CACHE_RESULT_MAX)
468 err = "invalid-cache";
469 if (!perf_evsel__is_cache_op_valid(type, op))
472 return __perf_evsel__hw_cache_type_op_res_name(type, op, result, bf, size);
474 return scnprintf(bf, size, "%s", err);
477 static int perf_evsel__hw_cache_name(struct perf_evsel *evsel, char *bf, size_t size)
479 int ret = __perf_evsel__hw_cache_name(evsel->attr.config, bf, size);
480 return ret + perf_evsel__add_modifiers(evsel, bf + ret, size - ret);
483 static int perf_evsel__raw_name(struct perf_evsel *evsel, char *bf, size_t size)
485 int ret = scnprintf(bf, size, "raw 0x%" PRIx64, evsel->attr.config);
486 return ret + perf_evsel__add_modifiers(evsel, bf + ret, size - ret);
489 const char *perf_evsel__name(struct perf_evsel *evsel)
496 switch (evsel->attr.type) {
498 perf_evsel__raw_name(evsel, bf, sizeof(bf));
501 case PERF_TYPE_HARDWARE:
502 perf_evsel__hw_name(evsel, bf, sizeof(bf));
505 case PERF_TYPE_HW_CACHE:
506 perf_evsel__hw_cache_name(evsel, bf, sizeof(bf));
509 case PERF_TYPE_SOFTWARE:
510 perf_evsel__sw_name(evsel, bf, sizeof(bf));
513 case PERF_TYPE_TRACEPOINT:
514 scnprintf(bf, sizeof(bf), "%s", "unknown tracepoint");
517 case PERF_TYPE_BREAKPOINT:
518 perf_evsel__bp_name(evsel, bf, sizeof(bf));
522 scnprintf(bf, sizeof(bf), "unknown attr type: %d",
527 evsel->name = strdup(bf);
529 return evsel->name ?: "unknown";
532 const char *perf_evsel__group_name(struct perf_evsel *evsel)
534 return evsel->group_name ?: "anon group";
537 int perf_evsel__group_desc(struct perf_evsel *evsel, char *buf, size_t size)
540 struct perf_evsel *pos;
541 const char *group_name = perf_evsel__group_name(evsel);
543 ret = scnprintf(buf, size, "%s", group_name);
545 ret += scnprintf(buf + ret, size - ret, " { %s",
546 perf_evsel__name(evsel));
548 for_each_group_member(pos, evsel)
549 ret += scnprintf(buf + ret, size - ret, ", %s",
550 perf_evsel__name(pos));
552 ret += scnprintf(buf + ret, size - ret, " }");
558 perf_evsel__config_callgraph(struct perf_evsel *evsel,
559 struct record_opts *opts,
560 struct callchain_param *param)
562 bool function = perf_evsel__is_function_event(evsel);
563 struct perf_event_attr *attr = &evsel->attr;
565 perf_evsel__set_sample_bit(evsel, CALLCHAIN);
567 if (param->record_mode == CALLCHAIN_LBR) {
568 if (!opts->branch_stack) {
569 if (attr->exclude_user) {
570 pr_warning("LBR callstack option is only available "
571 "to get user callchain information. "
572 "Falling back to framepointers.\n");
574 perf_evsel__set_sample_bit(evsel, BRANCH_STACK);
575 attr->branch_sample_type = PERF_SAMPLE_BRANCH_USER |
576 PERF_SAMPLE_BRANCH_CALL_STACK;
579 pr_warning("Cannot use LBR callstack with branch stack. "
580 "Falling back to framepointers.\n");
583 if (param->record_mode == CALLCHAIN_DWARF) {
585 perf_evsel__set_sample_bit(evsel, REGS_USER);
586 perf_evsel__set_sample_bit(evsel, STACK_USER);
587 attr->sample_regs_user = PERF_REGS_MASK;
588 attr->sample_stack_user = param->dump_size;
589 attr->exclude_callchain_user = 1;
591 pr_info("Cannot use DWARF unwind for function trace event,"
592 " falling back to framepointers.\n");
597 pr_info("Disabling user space callchains for function trace event.\n");
598 attr->exclude_callchain_user = 1;
603 perf_evsel__reset_callgraph(struct perf_evsel *evsel,
604 struct callchain_param *param)
606 struct perf_event_attr *attr = &evsel->attr;
608 perf_evsel__reset_sample_bit(evsel, CALLCHAIN);
609 if (param->record_mode == CALLCHAIN_LBR) {
610 perf_evsel__reset_sample_bit(evsel, BRANCH_STACK);
611 attr->branch_sample_type &= ~(PERF_SAMPLE_BRANCH_USER |
612 PERF_SAMPLE_BRANCH_CALL_STACK);
614 if (param->record_mode == CALLCHAIN_DWARF) {
615 perf_evsel__reset_sample_bit(evsel, REGS_USER);
616 perf_evsel__reset_sample_bit(evsel, STACK_USER);
620 static void apply_config_terms(struct perf_evsel *evsel,
621 struct record_opts *opts)
623 struct perf_evsel_config_term *term;
624 struct list_head *config_terms = &evsel->config_terms;
625 struct perf_event_attr *attr = &evsel->attr;
626 struct callchain_param param;
628 char *callgraph_buf = NULL;
630 /* callgraph default */
631 param.record_mode = callchain_param.record_mode;
633 list_for_each_entry(term, config_terms, list) {
634 switch (term->type) {
635 case PERF_EVSEL__CONFIG_TERM_PERIOD:
636 attr->sample_period = term->val.period;
639 case PERF_EVSEL__CONFIG_TERM_FREQ:
640 attr->sample_freq = term->val.freq;
643 case PERF_EVSEL__CONFIG_TERM_TIME:
645 perf_evsel__set_sample_bit(evsel, TIME);
647 perf_evsel__reset_sample_bit(evsel, TIME);
649 case PERF_EVSEL__CONFIG_TERM_CALLGRAPH:
650 callgraph_buf = term->val.callgraph;
652 case PERF_EVSEL__CONFIG_TERM_STACK_USER:
653 dump_size = term->val.stack_user;
660 /* User explicitly set per-event callgraph, clear the old setting and reset. */
661 if ((callgraph_buf != NULL) || (dump_size > 0)) {
663 /* parse callgraph parameters */
664 if (callgraph_buf != NULL) {
665 if (!strcmp(callgraph_buf, "no")) {
666 param.enabled = false;
667 param.record_mode = CALLCHAIN_NONE;
669 param.enabled = true;
670 if (parse_callchain_record(callgraph_buf, ¶m)) {
671 pr_err("per-event callgraph setting for %s failed. "
672 "Apply callgraph global setting for it\n",
679 dump_size = round_up(dump_size, sizeof(u64));
680 param.dump_size = dump_size;
683 /* If global callgraph set, clear it */
684 if (callchain_param.enabled)
685 perf_evsel__reset_callgraph(evsel, &callchain_param);
687 /* set perf-event callgraph */
689 perf_evsel__config_callgraph(evsel, opts, ¶m);
694 * The enable_on_exec/disabled value strategy:
696 * 1) For any type of traced program:
697 * - all independent events and group leaders are disabled
698 * - all group members are enabled
700 * Group members are ruled by group leaders. They need to
701 * be enabled, because the group scheduling relies on that.
703 * 2) For traced programs executed by perf:
704 * - all independent events and group leaders have
706 * - we don't specifically enable or disable any event during
709 * Independent events and group leaders are initially disabled
710 * and get enabled by exec. Group members are ruled by group
711 * leaders as stated in 1).
713 * 3) For traced programs attached by perf (pid/tid):
714 * - we specifically enable or disable all events during
717 * When attaching events to already running traced we
718 * enable/disable events specifically, as there's no
719 * initial traced exec call.
721 void perf_evsel__config(struct perf_evsel *evsel, struct record_opts *opts)
723 struct perf_evsel *leader = evsel->leader;
724 struct perf_event_attr *attr = &evsel->attr;
725 int track = evsel->tracking;
726 bool per_cpu = opts->target.default_per_cpu && !opts->target.per_thread;
728 attr->sample_id_all = perf_missing_features.sample_id_all ? 0 : 1;
729 attr->inherit = !opts->no_inherit;
731 perf_evsel__set_sample_bit(evsel, IP);
732 perf_evsel__set_sample_bit(evsel, TID);
734 if (evsel->sample_read) {
735 perf_evsel__set_sample_bit(evsel, READ);
738 * We need ID even in case of single event, because
739 * PERF_SAMPLE_READ process ID specific data.
741 perf_evsel__set_sample_id(evsel, false);
744 * Apply group format only if we belong to group
745 * with more than one members.
747 if (leader->nr_members > 1) {
748 attr->read_format |= PERF_FORMAT_GROUP;
754 * We default some events to have a default interval. But keep
755 * it a weak assumption overridable by the user.
757 if (!attr->sample_period || (opts->user_freq != UINT_MAX ||
758 opts->user_interval != ULLONG_MAX)) {
760 perf_evsel__set_sample_bit(evsel, PERIOD);
762 attr->sample_freq = opts->freq;
764 attr->sample_period = opts->default_interval;
769 * Disable sampling for all group members other
770 * than leader in case leader 'leads' the sampling.
772 if ((leader != evsel) && leader->sample_read) {
773 attr->sample_freq = 0;
774 attr->sample_period = 0;
777 if (opts->no_samples)
778 attr->sample_freq = 0;
780 if (opts->inherit_stat)
781 attr->inherit_stat = 1;
783 if (opts->sample_address) {
784 perf_evsel__set_sample_bit(evsel, ADDR);
785 attr->mmap_data = track;
789 * We don't allow user space callchains for function trace
790 * event, due to issues with page faults while tracing page
791 * fault handler and its overall trickiness nature.
793 if (perf_evsel__is_function_event(evsel))
794 evsel->attr.exclude_callchain_user = 1;
796 if (callchain_param.enabled && !evsel->no_aux_samples)
797 perf_evsel__config_callgraph(evsel, opts, &callchain_param);
799 if (opts->sample_intr_regs) {
800 attr->sample_regs_intr = opts->sample_intr_regs;
801 perf_evsel__set_sample_bit(evsel, REGS_INTR);
804 if (target__has_cpu(&opts->target))
805 perf_evsel__set_sample_bit(evsel, CPU);
808 perf_evsel__set_sample_bit(evsel, PERIOD);
811 * When the user explicitely disabled time don't force it here.
813 if (opts->sample_time &&
814 (!perf_missing_features.sample_id_all &&
815 (!opts->no_inherit || target__has_cpu(&opts->target) || per_cpu ||
816 opts->sample_time_set)))
817 perf_evsel__set_sample_bit(evsel, TIME);
819 if (opts->raw_samples && !evsel->no_aux_samples) {
820 perf_evsel__set_sample_bit(evsel, TIME);
821 perf_evsel__set_sample_bit(evsel, RAW);
822 perf_evsel__set_sample_bit(evsel, CPU);
825 if (opts->sample_address)
826 perf_evsel__set_sample_bit(evsel, DATA_SRC);
828 if (opts->no_buffering) {
830 attr->wakeup_events = 1;
832 if (opts->branch_stack && !evsel->no_aux_samples) {
833 perf_evsel__set_sample_bit(evsel, BRANCH_STACK);
834 attr->branch_sample_type = opts->branch_stack;
837 if (opts->sample_weight)
838 perf_evsel__set_sample_bit(evsel, WEIGHT);
842 attr->mmap2 = track && !perf_missing_features.mmap2;
845 if (opts->record_switch_events)
846 attr->context_switch = track;
848 if (opts->sample_transaction)
849 perf_evsel__set_sample_bit(evsel, TRANSACTION);
851 if (opts->running_time) {
852 evsel->attr.read_format |=
853 PERF_FORMAT_TOTAL_TIME_ENABLED |
854 PERF_FORMAT_TOTAL_TIME_RUNNING;
858 * XXX see the function comment above
860 * Disabling only independent events or group leaders,
861 * keeping group members enabled.
863 if (perf_evsel__is_group_leader(evsel))
867 * Setting enable_on_exec for independent events and
868 * group leaders for traced executed by perf.
870 if (target__none(&opts->target) && perf_evsel__is_group_leader(evsel) &&
871 !opts->initial_delay)
872 attr->enable_on_exec = 1;
874 if (evsel->immediate) {
876 attr->enable_on_exec = 0;
879 clockid = opts->clockid;
880 if (opts->use_clockid) {
881 attr->use_clockid = 1;
882 attr->clockid = opts->clockid;
886 * Apply event specific term settings,
887 * it overloads any global configuration.
889 apply_config_terms(evsel, opts);
892 static int perf_evsel__alloc_fd(struct perf_evsel *evsel, int ncpus, int nthreads)
896 if (evsel->system_wide)
899 evsel->fd = xyarray__new(ncpus, nthreads, sizeof(int));
902 for (cpu = 0; cpu < ncpus; cpu++) {
903 for (thread = 0; thread < nthreads; thread++) {
904 FD(evsel, cpu, thread) = -1;
909 return evsel->fd != NULL ? 0 : -ENOMEM;
912 static int perf_evsel__run_ioctl(struct perf_evsel *evsel, int ncpus, int nthreads,
917 if (evsel->system_wide)
920 for (cpu = 0; cpu < ncpus; cpu++) {
921 for (thread = 0; thread < nthreads; thread++) {
922 int fd = FD(evsel, cpu, thread),
923 err = ioctl(fd, ioc, arg);
933 int perf_evsel__apply_filter(struct perf_evsel *evsel, int ncpus, int nthreads,
936 return perf_evsel__run_ioctl(evsel, ncpus, nthreads,
937 PERF_EVENT_IOC_SET_FILTER,
941 int perf_evsel__set_filter(struct perf_evsel *evsel, const char *filter)
943 char *new_filter = strdup(filter);
945 if (new_filter != NULL) {
947 evsel->filter = new_filter;
954 int perf_evsel__append_filter(struct perf_evsel *evsel,
955 const char *op, const char *filter)
959 if (evsel->filter == NULL)
960 return perf_evsel__set_filter(evsel, filter);
962 if (asprintf(&new_filter,"(%s) %s (%s)", evsel->filter, op, filter) > 0) {
964 evsel->filter = new_filter;
971 int perf_evsel__enable(struct perf_evsel *evsel, int ncpus, int nthreads)
973 return perf_evsel__run_ioctl(evsel, ncpus, nthreads,
974 PERF_EVENT_IOC_ENABLE,
978 int perf_evsel__alloc_id(struct perf_evsel *evsel, int ncpus, int nthreads)
980 if (ncpus == 0 || nthreads == 0)
983 if (evsel->system_wide)
986 evsel->sample_id = xyarray__new(ncpus, nthreads, sizeof(struct perf_sample_id));
987 if (evsel->sample_id == NULL)
990 evsel->id = zalloc(ncpus * nthreads * sizeof(u64));
991 if (evsel->id == NULL) {
992 xyarray__delete(evsel->sample_id);
993 evsel->sample_id = NULL;
1000 static void perf_evsel__free_fd(struct perf_evsel *evsel)
1002 xyarray__delete(evsel->fd);
1006 static void perf_evsel__free_id(struct perf_evsel *evsel)
1008 xyarray__delete(evsel->sample_id);
1009 evsel->sample_id = NULL;
1013 static void perf_evsel__free_config_terms(struct perf_evsel *evsel)
1015 struct perf_evsel_config_term *term, *h;
1017 list_for_each_entry_safe(term, h, &evsel->config_terms, list) {
1018 list_del(&term->list);
1023 void perf_evsel__close_fd(struct perf_evsel *evsel, int ncpus, int nthreads)
1027 if (evsel->system_wide)
1030 for (cpu = 0; cpu < ncpus; cpu++)
1031 for (thread = 0; thread < nthreads; ++thread) {
1032 close(FD(evsel, cpu, thread));
1033 FD(evsel, cpu, thread) = -1;
1037 void perf_evsel__exit(struct perf_evsel *evsel)
1039 assert(list_empty(&evsel->node));
1040 assert(evsel->evlist == NULL);
1041 perf_evsel__free_fd(evsel);
1042 perf_evsel__free_id(evsel);
1043 perf_evsel__free_config_terms(evsel);
1044 close_cgroup(evsel->cgrp);
1045 cpu_map__put(evsel->cpus);
1046 thread_map__put(evsel->threads);
1047 zfree(&evsel->group_name);
1048 zfree(&evsel->name);
1049 perf_evsel__object.fini(evsel);
1052 void perf_evsel__delete(struct perf_evsel *evsel)
1054 perf_evsel__exit(evsel);
1058 void perf_evsel__compute_deltas(struct perf_evsel *evsel, int cpu, int thread,
1059 struct perf_counts_values *count)
1061 struct perf_counts_values tmp;
1063 if (!evsel->prev_raw_counts)
1067 tmp = evsel->prev_raw_counts->aggr;
1068 evsel->prev_raw_counts->aggr = *count;
1070 tmp = *perf_counts(evsel->prev_raw_counts, cpu, thread);
1071 *perf_counts(evsel->prev_raw_counts, cpu, thread) = *count;
1074 count->val = count->val - tmp.val;
1075 count->ena = count->ena - tmp.ena;
1076 count->run = count->run - tmp.run;
1079 void perf_counts_values__scale(struct perf_counts_values *count,
1080 bool scale, s8 *pscaled)
1085 if (count->run == 0) {
1088 } else if (count->run < count->ena) {
1090 count->val = (u64)((double) count->val * count->ena / count->run + 0.5);
1093 count->ena = count->run = 0;
1099 int perf_evsel__read(struct perf_evsel *evsel, int cpu, int thread,
1100 struct perf_counts_values *count)
1102 memset(count, 0, sizeof(*count));
1104 if (FD(evsel, cpu, thread) < 0)
1107 if (readn(FD(evsel, cpu, thread), count, sizeof(*count)) < 0)
1113 int __perf_evsel__read_on_cpu(struct perf_evsel *evsel,
1114 int cpu, int thread, bool scale)
1116 struct perf_counts_values count;
1117 size_t nv = scale ? 3 : 1;
1119 if (FD(evsel, cpu, thread) < 0)
1122 if (evsel->counts == NULL && perf_evsel__alloc_counts(evsel, cpu + 1, thread + 1) < 0)
1125 if (readn(FD(evsel, cpu, thread), &count, nv * sizeof(u64)) < 0)
1128 perf_evsel__compute_deltas(evsel, cpu, thread, &count);
1129 perf_counts_values__scale(&count, scale, NULL);
1130 *perf_counts(evsel->counts, cpu, thread) = count;
1134 static int get_group_fd(struct perf_evsel *evsel, int cpu, int thread)
1136 struct perf_evsel *leader = evsel->leader;
1139 if (perf_evsel__is_group_leader(evsel))
1143 * Leader must be already processed/open,
1144 * if not it's a bug.
1146 BUG_ON(!leader->fd);
1148 fd = FD(leader, cpu, thread);
1159 static void __p_bits(char *buf, size_t size, u64 value, struct bit_names *bits)
1161 bool first_bit = true;
1165 if (value & bits[i].bit) {
1166 buf += scnprintf(buf, size, "%s%s", first_bit ? "" : "|", bits[i].name);
1169 } while (bits[++i].name != NULL);
1172 static void __p_sample_type(char *buf, size_t size, u64 value)
1174 #define bit_name(n) { PERF_SAMPLE_##n, #n }
1175 struct bit_names bits[] = {
1176 bit_name(IP), bit_name(TID), bit_name(TIME), bit_name(ADDR),
1177 bit_name(READ), bit_name(CALLCHAIN), bit_name(ID), bit_name(CPU),
1178 bit_name(PERIOD), bit_name(STREAM_ID), bit_name(RAW),
1179 bit_name(BRANCH_STACK), bit_name(REGS_USER), bit_name(STACK_USER),
1180 bit_name(IDENTIFIER), bit_name(REGS_INTR),
1184 __p_bits(buf, size, value, bits);
1187 static void __p_read_format(char *buf, size_t size, u64 value)
1189 #define bit_name(n) { PERF_FORMAT_##n, #n }
1190 struct bit_names bits[] = {
1191 bit_name(TOTAL_TIME_ENABLED), bit_name(TOTAL_TIME_RUNNING),
1192 bit_name(ID), bit_name(GROUP),
1196 __p_bits(buf, size, value, bits);
1199 #define BUF_SIZE 1024
1201 #define p_hex(val) snprintf(buf, BUF_SIZE, "%#"PRIx64, (uint64_t)(val))
1202 #define p_unsigned(val) snprintf(buf, BUF_SIZE, "%"PRIu64, (uint64_t)(val))
1203 #define p_signed(val) snprintf(buf, BUF_SIZE, "%"PRId64, (int64_t)(val))
1204 #define p_sample_type(val) __p_sample_type(buf, BUF_SIZE, val)
1205 #define p_read_format(val) __p_read_format(buf, BUF_SIZE, val)
1207 #define PRINT_ATTRn(_n, _f, _p) \
1211 ret += attr__fprintf(fp, _n, buf, priv);\
1215 #define PRINT_ATTRf(_f, _p) PRINT_ATTRn(#_f, _f, _p)
1217 int perf_event_attr__fprintf(FILE *fp, struct perf_event_attr *attr,
1218 attr__fprintf_f attr__fprintf, void *priv)
1223 PRINT_ATTRf(type, p_unsigned);
1224 PRINT_ATTRf(size, p_unsigned);
1225 PRINT_ATTRf(config, p_hex);
1226 PRINT_ATTRn("{ sample_period, sample_freq }", sample_period, p_unsigned);
1227 PRINT_ATTRf(sample_type, p_sample_type);
1228 PRINT_ATTRf(read_format, p_read_format);
1230 PRINT_ATTRf(disabled, p_unsigned);
1231 PRINT_ATTRf(inherit, p_unsigned);
1232 PRINT_ATTRf(pinned, p_unsigned);
1233 PRINT_ATTRf(exclusive, p_unsigned);
1234 PRINT_ATTRf(exclude_user, p_unsigned);
1235 PRINT_ATTRf(exclude_kernel, p_unsigned);
1236 PRINT_ATTRf(exclude_hv, p_unsigned);
1237 PRINT_ATTRf(exclude_idle, p_unsigned);
1238 PRINT_ATTRf(mmap, p_unsigned);
1239 PRINT_ATTRf(comm, p_unsigned);
1240 PRINT_ATTRf(freq, p_unsigned);
1241 PRINT_ATTRf(inherit_stat, p_unsigned);
1242 PRINT_ATTRf(enable_on_exec, p_unsigned);
1243 PRINT_ATTRf(task, p_unsigned);
1244 PRINT_ATTRf(watermark, p_unsigned);
1245 PRINT_ATTRf(precise_ip, p_unsigned);
1246 PRINT_ATTRf(mmap_data, p_unsigned);
1247 PRINT_ATTRf(sample_id_all, p_unsigned);
1248 PRINT_ATTRf(exclude_host, p_unsigned);
1249 PRINT_ATTRf(exclude_guest, p_unsigned);
1250 PRINT_ATTRf(exclude_callchain_kernel, p_unsigned);
1251 PRINT_ATTRf(exclude_callchain_user, p_unsigned);
1252 PRINT_ATTRf(mmap2, p_unsigned);
1253 PRINT_ATTRf(comm_exec, p_unsigned);
1254 PRINT_ATTRf(use_clockid, p_unsigned);
1255 PRINT_ATTRf(context_switch, p_unsigned);
1257 PRINT_ATTRn("{ wakeup_events, wakeup_watermark }", wakeup_events, p_unsigned);
1258 PRINT_ATTRf(bp_type, p_unsigned);
1259 PRINT_ATTRn("{ bp_addr, config1 }", bp_addr, p_hex);
1260 PRINT_ATTRn("{ bp_len, config2 }", bp_len, p_hex);
1261 PRINT_ATTRf(sample_regs_user, p_hex);
1262 PRINT_ATTRf(sample_stack_user, p_unsigned);
1263 PRINT_ATTRf(clockid, p_signed);
1264 PRINT_ATTRf(sample_regs_intr, p_hex);
1265 PRINT_ATTRf(aux_watermark, p_unsigned);
1270 static int __open_attr__fprintf(FILE *fp, const char *name, const char *val,
1271 void *priv __attribute__((unused)))
1273 return fprintf(fp, " %-32s %s\n", name, val);
1276 static int __perf_evsel__open(struct perf_evsel *evsel, struct cpu_map *cpus,
1277 struct thread_map *threads)
1279 int cpu, thread, nthreads;
1280 unsigned long flags = PERF_FLAG_FD_CLOEXEC;
1282 enum { NO_CHANGE, SET_TO_MAX, INCREASED_MAX } set_rlimit = NO_CHANGE;
1284 if (evsel->system_wide)
1287 nthreads = threads->nr;
1289 if (evsel->fd == NULL &&
1290 perf_evsel__alloc_fd(evsel, cpus->nr, nthreads) < 0)
1294 flags |= PERF_FLAG_PID_CGROUP;
1295 pid = evsel->cgrp->fd;
1298 fallback_missing_features:
1299 if (perf_missing_features.clockid_wrong)
1300 evsel->attr.clockid = CLOCK_MONOTONIC; /* should always work */
1301 if (perf_missing_features.clockid) {
1302 evsel->attr.use_clockid = 0;
1303 evsel->attr.clockid = 0;
1305 if (perf_missing_features.cloexec)
1306 flags &= ~(unsigned long)PERF_FLAG_FD_CLOEXEC;
1307 if (perf_missing_features.mmap2)
1308 evsel->attr.mmap2 = 0;
1309 if (perf_missing_features.exclude_guest)
1310 evsel->attr.exclude_guest = evsel->attr.exclude_host = 0;
1312 if (perf_missing_features.sample_id_all)
1313 evsel->attr.sample_id_all = 0;
1316 fprintf(stderr, "%.60s\n", graph_dotted_line);
1317 fprintf(stderr, "perf_event_attr:\n");
1318 perf_event_attr__fprintf(stderr, &evsel->attr, __open_attr__fprintf, NULL);
1319 fprintf(stderr, "%.60s\n", graph_dotted_line);
1322 for (cpu = 0; cpu < cpus->nr; cpu++) {
1324 for (thread = 0; thread < nthreads; thread++) {
1327 if (!evsel->cgrp && !evsel->system_wide)
1328 pid = thread_map__pid(threads, thread);
1330 group_fd = get_group_fd(evsel, cpu, thread);
1332 pr_debug2("sys_perf_event_open: pid %d cpu %d group_fd %d flags %#lx\n",
1333 pid, cpus->map[cpu], group_fd, flags);
1335 FD(evsel, cpu, thread) = sys_perf_event_open(&evsel->attr,
1339 if (FD(evsel, cpu, thread) < 0) {
1341 pr_debug2("sys_perf_event_open failed, error %d\n",
1345 set_rlimit = NO_CHANGE;
1348 * If we succeeded but had to kill clockid, fail and
1349 * have perf_evsel__open_strerror() print us a nice
1352 if (perf_missing_features.clockid ||
1353 perf_missing_features.clockid_wrong) {
1364 * perf stat needs between 5 and 22 fds per CPU. When we run out
1365 * of them try to increase the limits.
1367 if (err == -EMFILE && set_rlimit < INCREASED_MAX) {
1369 int old_errno = errno;
1371 if (getrlimit(RLIMIT_NOFILE, &l) == 0) {
1372 if (set_rlimit == NO_CHANGE)
1373 l.rlim_cur = l.rlim_max;
1375 l.rlim_cur = l.rlim_max + 1000;
1376 l.rlim_max = l.rlim_cur;
1378 if (setrlimit(RLIMIT_NOFILE, &l) == 0) {
1387 if (err != -EINVAL || cpu > 0 || thread > 0)
1391 * Must probe features in the order they were added to the
1392 * perf_event_attr interface.
1394 if (!perf_missing_features.clockid_wrong && evsel->attr.use_clockid) {
1395 perf_missing_features.clockid_wrong = true;
1396 goto fallback_missing_features;
1397 } else if (!perf_missing_features.clockid && evsel->attr.use_clockid) {
1398 perf_missing_features.clockid = true;
1399 goto fallback_missing_features;
1400 } else if (!perf_missing_features.cloexec && (flags & PERF_FLAG_FD_CLOEXEC)) {
1401 perf_missing_features.cloexec = true;
1402 goto fallback_missing_features;
1403 } else if (!perf_missing_features.mmap2 && evsel->attr.mmap2) {
1404 perf_missing_features.mmap2 = true;
1405 goto fallback_missing_features;
1406 } else if (!perf_missing_features.exclude_guest &&
1407 (evsel->attr.exclude_guest || evsel->attr.exclude_host)) {
1408 perf_missing_features.exclude_guest = true;
1409 goto fallback_missing_features;
1410 } else if (!perf_missing_features.sample_id_all) {
1411 perf_missing_features.sample_id_all = true;
1412 goto retry_sample_id;
1417 while (--thread >= 0) {
1418 close(FD(evsel, cpu, thread));
1419 FD(evsel, cpu, thread) = -1;
1422 } while (--cpu >= 0);
1426 void perf_evsel__close(struct perf_evsel *evsel, int ncpus, int nthreads)
1428 if (evsel->fd == NULL)
1431 perf_evsel__close_fd(evsel, ncpus, nthreads);
1432 perf_evsel__free_fd(evsel);
1444 struct thread_map map;
1446 } empty_thread_map = {
1451 int perf_evsel__open(struct perf_evsel *evsel, struct cpu_map *cpus,
1452 struct thread_map *threads)
1455 /* Work around old compiler warnings about strict aliasing */
1456 cpus = &empty_cpu_map.map;
1459 if (threads == NULL)
1460 threads = &empty_thread_map.map;
1462 return __perf_evsel__open(evsel, cpus, threads);
1465 int perf_evsel__open_per_cpu(struct perf_evsel *evsel,
1466 struct cpu_map *cpus)
1468 return __perf_evsel__open(evsel, cpus, &empty_thread_map.map);
1471 int perf_evsel__open_per_thread(struct perf_evsel *evsel,
1472 struct thread_map *threads)
1474 return __perf_evsel__open(evsel, &empty_cpu_map.map, threads);
1477 static int perf_evsel__parse_id_sample(const struct perf_evsel *evsel,
1478 const union perf_event *event,
1479 struct perf_sample *sample)
1481 u64 type = evsel->attr.sample_type;
1482 const u64 *array = event->sample.array;
1483 bool swapped = evsel->needs_swap;
1486 array += ((event->header.size -
1487 sizeof(event->header)) / sizeof(u64)) - 1;
1489 if (type & PERF_SAMPLE_IDENTIFIER) {
1490 sample->id = *array;
1494 if (type & PERF_SAMPLE_CPU) {
1497 /* undo swap of u64, then swap on individual u32s */
1498 u.val64 = bswap_64(u.val64);
1499 u.val32[0] = bswap_32(u.val32[0]);
1502 sample->cpu = u.val32[0];
1506 if (type & PERF_SAMPLE_STREAM_ID) {
1507 sample->stream_id = *array;
1511 if (type & PERF_SAMPLE_ID) {
1512 sample->id = *array;
1516 if (type & PERF_SAMPLE_TIME) {
1517 sample->time = *array;
1521 if (type & PERF_SAMPLE_TID) {
1524 /* undo swap of u64, then swap on individual u32s */
1525 u.val64 = bswap_64(u.val64);
1526 u.val32[0] = bswap_32(u.val32[0]);
1527 u.val32[1] = bswap_32(u.val32[1]);
1530 sample->pid = u.val32[0];
1531 sample->tid = u.val32[1];
1538 static inline bool overflow(const void *endp, u16 max_size, const void *offset,
1541 return size > max_size || offset + size > endp;
1544 #define OVERFLOW_CHECK(offset, size, max_size) \
1546 if (overflow(endp, (max_size), (offset), (size))) \
1550 #define OVERFLOW_CHECK_u64(offset) \
1551 OVERFLOW_CHECK(offset, sizeof(u64), sizeof(u64))
1553 int perf_evsel__parse_sample(struct perf_evsel *evsel, union perf_event *event,
1554 struct perf_sample *data)
1556 u64 type = evsel->attr.sample_type;
1557 bool swapped = evsel->needs_swap;
1559 u16 max_size = event->header.size;
1560 const void *endp = (void *)event + max_size;
1564 * used for cross-endian analysis. See git commit 65014ab3
1565 * for why this goofiness is needed.
1569 memset(data, 0, sizeof(*data));
1570 data->cpu = data->pid = data->tid = -1;
1571 data->stream_id = data->id = data->time = -1ULL;
1572 data->period = evsel->attr.sample_period;
1575 if (event->header.type != PERF_RECORD_SAMPLE) {
1576 if (!evsel->attr.sample_id_all)
1578 return perf_evsel__parse_id_sample(evsel, event, data);
1581 array = event->sample.array;
1584 * The evsel's sample_size is based on PERF_SAMPLE_MASK which includes
1585 * up to PERF_SAMPLE_PERIOD. After that overflow() must be used to
1586 * check the format does not go past the end of the event.
1588 if (evsel->sample_size + sizeof(event->header) > event->header.size)
1592 if (type & PERF_SAMPLE_IDENTIFIER) {
1597 if (type & PERF_SAMPLE_IP) {
1602 if (type & PERF_SAMPLE_TID) {
1605 /* undo swap of u64, then swap on individual u32s */
1606 u.val64 = bswap_64(u.val64);
1607 u.val32[0] = bswap_32(u.val32[0]);
1608 u.val32[1] = bswap_32(u.val32[1]);
1611 data->pid = u.val32[0];
1612 data->tid = u.val32[1];
1616 if (type & PERF_SAMPLE_TIME) {
1617 data->time = *array;
1622 if (type & PERF_SAMPLE_ADDR) {
1623 data->addr = *array;
1627 if (type & PERF_SAMPLE_ID) {
1632 if (type & PERF_SAMPLE_STREAM_ID) {
1633 data->stream_id = *array;
1637 if (type & PERF_SAMPLE_CPU) {
1641 /* undo swap of u64, then swap on individual u32s */
1642 u.val64 = bswap_64(u.val64);
1643 u.val32[0] = bswap_32(u.val32[0]);
1646 data->cpu = u.val32[0];
1650 if (type & PERF_SAMPLE_PERIOD) {
1651 data->period = *array;
1655 if (type & PERF_SAMPLE_READ) {
1656 u64 read_format = evsel->attr.read_format;
1658 OVERFLOW_CHECK_u64(array);
1659 if (read_format & PERF_FORMAT_GROUP)
1660 data->read.group.nr = *array;
1662 data->read.one.value = *array;
1666 if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED) {
1667 OVERFLOW_CHECK_u64(array);
1668 data->read.time_enabled = *array;
1672 if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING) {
1673 OVERFLOW_CHECK_u64(array);
1674 data->read.time_running = *array;
1678 /* PERF_FORMAT_ID is forced for PERF_SAMPLE_READ */
1679 if (read_format & PERF_FORMAT_GROUP) {
1680 const u64 max_group_nr = UINT64_MAX /
1681 sizeof(struct sample_read_value);
1683 if (data->read.group.nr > max_group_nr)
1685 sz = data->read.group.nr *
1686 sizeof(struct sample_read_value);
1687 OVERFLOW_CHECK(array, sz, max_size);
1688 data->read.group.values =
1689 (struct sample_read_value *)array;
1690 array = (void *)array + sz;
1692 OVERFLOW_CHECK_u64(array);
1693 data->read.one.id = *array;
1698 if (type & PERF_SAMPLE_CALLCHAIN) {
1699 const u64 max_callchain_nr = UINT64_MAX / sizeof(u64);
1701 OVERFLOW_CHECK_u64(array);
1702 data->callchain = (struct ip_callchain *)array++;
1703 if (data->callchain->nr > max_callchain_nr)
1705 sz = data->callchain->nr * sizeof(u64);
1706 OVERFLOW_CHECK(array, sz, max_size);
1707 array = (void *)array + sz;
1710 if (type & PERF_SAMPLE_RAW) {
1711 OVERFLOW_CHECK_u64(array);
1713 if (WARN_ONCE(swapped,
1714 "Endianness of raw data not corrected!\n")) {
1715 /* undo swap of u64, then swap on individual u32s */
1716 u.val64 = bswap_64(u.val64);
1717 u.val32[0] = bswap_32(u.val32[0]);
1718 u.val32[1] = bswap_32(u.val32[1]);
1720 data->raw_size = u.val32[0];
1721 array = (void *)array + sizeof(u32);
1723 OVERFLOW_CHECK(array, data->raw_size, max_size);
1724 data->raw_data = (void *)array;
1725 array = (void *)array + data->raw_size;
1728 if (type & PERF_SAMPLE_BRANCH_STACK) {
1729 const u64 max_branch_nr = UINT64_MAX /
1730 sizeof(struct branch_entry);
1732 OVERFLOW_CHECK_u64(array);
1733 data->branch_stack = (struct branch_stack *)array++;
1735 if (data->branch_stack->nr > max_branch_nr)
1737 sz = data->branch_stack->nr * sizeof(struct branch_entry);
1738 OVERFLOW_CHECK(array, sz, max_size);
1739 array = (void *)array + sz;
1742 if (type & PERF_SAMPLE_REGS_USER) {
1743 OVERFLOW_CHECK_u64(array);
1744 data->user_regs.abi = *array;
1747 if (data->user_regs.abi) {
1748 u64 mask = evsel->attr.sample_regs_user;
1750 sz = hweight_long(mask) * sizeof(u64);
1751 OVERFLOW_CHECK(array, sz, max_size);
1752 data->user_regs.mask = mask;
1753 data->user_regs.regs = (u64 *)array;
1754 array = (void *)array + sz;
1758 if (type & PERF_SAMPLE_STACK_USER) {
1759 OVERFLOW_CHECK_u64(array);
1762 data->user_stack.offset = ((char *)(array - 1)
1766 data->user_stack.size = 0;
1768 OVERFLOW_CHECK(array, sz, max_size);
1769 data->user_stack.data = (char *)array;
1770 array = (void *)array + sz;
1771 OVERFLOW_CHECK_u64(array);
1772 data->user_stack.size = *array++;
1773 if (WARN_ONCE(data->user_stack.size > sz,
1774 "user stack dump failure\n"))
1780 if (type & PERF_SAMPLE_WEIGHT) {
1781 OVERFLOW_CHECK_u64(array);
1782 data->weight = *array;
1786 data->data_src = PERF_MEM_DATA_SRC_NONE;
1787 if (type & PERF_SAMPLE_DATA_SRC) {
1788 OVERFLOW_CHECK_u64(array);
1789 data->data_src = *array;
1793 data->transaction = 0;
1794 if (type & PERF_SAMPLE_TRANSACTION) {
1795 OVERFLOW_CHECK_u64(array);
1796 data->transaction = *array;
1800 data->intr_regs.abi = PERF_SAMPLE_REGS_ABI_NONE;
1801 if (type & PERF_SAMPLE_REGS_INTR) {
1802 OVERFLOW_CHECK_u64(array);
1803 data->intr_regs.abi = *array;
1806 if (data->intr_regs.abi != PERF_SAMPLE_REGS_ABI_NONE) {
1807 u64 mask = evsel->attr.sample_regs_intr;
1809 sz = hweight_long(mask) * sizeof(u64);
1810 OVERFLOW_CHECK(array, sz, max_size);
1811 data->intr_regs.mask = mask;
1812 data->intr_regs.regs = (u64 *)array;
1813 array = (void *)array + sz;
1820 size_t perf_event__sample_event_size(const struct perf_sample *sample, u64 type,
1823 size_t sz, result = sizeof(struct sample_event);
1825 if (type & PERF_SAMPLE_IDENTIFIER)
1826 result += sizeof(u64);
1828 if (type & PERF_SAMPLE_IP)
1829 result += sizeof(u64);
1831 if (type & PERF_SAMPLE_TID)
1832 result += sizeof(u64);
1834 if (type & PERF_SAMPLE_TIME)
1835 result += sizeof(u64);
1837 if (type & PERF_SAMPLE_ADDR)
1838 result += sizeof(u64);
1840 if (type & PERF_SAMPLE_ID)
1841 result += sizeof(u64);
1843 if (type & PERF_SAMPLE_STREAM_ID)
1844 result += sizeof(u64);
1846 if (type & PERF_SAMPLE_CPU)
1847 result += sizeof(u64);
1849 if (type & PERF_SAMPLE_PERIOD)
1850 result += sizeof(u64);
1852 if (type & PERF_SAMPLE_READ) {
1853 result += sizeof(u64);
1854 if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED)
1855 result += sizeof(u64);
1856 if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING)
1857 result += sizeof(u64);
1858 /* PERF_FORMAT_ID is forced for PERF_SAMPLE_READ */
1859 if (read_format & PERF_FORMAT_GROUP) {
1860 sz = sample->read.group.nr *
1861 sizeof(struct sample_read_value);
1864 result += sizeof(u64);
1868 if (type & PERF_SAMPLE_CALLCHAIN) {
1869 sz = (sample->callchain->nr + 1) * sizeof(u64);
1873 if (type & PERF_SAMPLE_RAW) {
1874 result += sizeof(u32);
1875 result += sample->raw_size;
1878 if (type & PERF_SAMPLE_BRANCH_STACK) {
1879 sz = sample->branch_stack->nr * sizeof(struct branch_entry);
1884 if (type & PERF_SAMPLE_REGS_USER) {
1885 if (sample->user_regs.abi) {
1886 result += sizeof(u64);
1887 sz = hweight_long(sample->user_regs.mask) * sizeof(u64);
1890 result += sizeof(u64);
1894 if (type & PERF_SAMPLE_STACK_USER) {
1895 sz = sample->user_stack.size;
1896 result += sizeof(u64);
1899 result += sizeof(u64);
1903 if (type & PERF_SAMPLE_WEIGHT)
1904 result += sizeof(u64);
1906 if (type & PERF_SAMPLE_DATA_SRC)
1907 result += sizeof(u64);
1909 if (type & PERF_SAMPLE_TRANSACTION)
1910 result += sizeof(u64);
1912 if (type & PERF_SAMPLE_REGS_INTR) {
1913 if (sample->intr_regs.abi) {
1914 result += sizeof(u64);
1915 sz = hweight_long(sample->intr_regs.mask) * sizeof(u64);
1918 result += sizeof(u64);
1925 int perf_event__synthesize_sample(union perf_event *event, u64 type,
1927 const struct perf_sample *sample,
1933 * used for cross-endian analysis. See git commit 65014ab3
1934 * for why this goofiness is needed.
1938 array = event->sample.array;
1940 if (type & PERF_SAMPLE_IDENTIFIER) {
1941 *array = sample->id;
1945 if (type & PERF_SAMPLE_IP) {
1946 *array = sample->ip;
1950 if (type & PERF_SAMPLE_TID) {
1951 u.val32[0] = sample->pid;
1952 u.val32[1] = sample->tid;
1955 * Inverse of what is done in perf_evsel__parse_sample
1957 u.val32[0] = bswap_32(u.val32[0]);
1958 u.val32[1] = bswap_32(u.val32[1]);
1959 u.val64 = bswap_64(u.val64);
1966 if (type & PERF_SAMPLE_TIME) {
1967 *array = sample->time;
1971 if (type & PERF_SAMPLE_ADDR) {
1972 *array = sample->addr;
1976 if (type & PERF_SAMPLE_ID) {
1977 *array = sample->id;
1981 if (type & PERF_SAMPLE_STREAM_ID) {
1982 *array = sample->stream_id;
1986 if (type & PERF_SAMPLE_CPU) {
1987 u.val32[0] = sample->cpu;
1990 * Inverse of what is done in perf_evsel__parse_sample
1992 u.val32[0] = bswap_32(u.val32[0]);
1993 u.val64 = bswap_64(u.val64);
1999 if (type & PERF_SAMPLE_PERIOD) {
2000 *array = sample->period;
2004 if (type & PERF_SAMPLE_READ) {
2005 if (read_format & PERF_FORMAT_GROUP)
2006 *array = sample->read.group.nr;
2008 *array = sample->read.one.value;
2011 if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED) {
2012 *array = sample->read.time_enabled;
2016 if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING) {
2017 *array = sample->read.time_running;
2021 /* PERF_FORMAT_ID is forced for PERF_SAMPLE_READ */
2022 if (read_format & PERF_FORMAT_GROUP) {
2023 sz = sample->read.group.nr *
2024 sizeof(struct sample_read_value);
2025 memcpy(array, sample->read.group.values, sz);
2026 array = (void *)array + sz;
2028 *array = sample->read.one.id;
2033 if (type & PERF_SAMPLE_CALLCHAIN) {
2034 sz = (sample->callchain->nr + 1) * sizeof(u64);
2035 memcpy(array, sample->callchain, sz);
2036 array = (void *)array + sz;
2039 if (type & PERF_SAMPLE_RAW) {
2040 u.val32[0] = sample->raw_size;
2041 if (WARN_ONCE(swapped,
2042 "Endianness of raw data not corrected!\n")) {
2044 * Inverse of what is done in perf_evsel__parse_sample
2046 u.val32[0] = bswap_32(u.val32[0]);
2047 u.val32[1] = bswap_32(u.val32[1]);
2048 u.val64 = bswap_64(u.val64);
2051 array = (void *)array + sizeof(u32);
2053 memcpy(array, sample->raw_data, sample->raw_size);
2054 array = (void *)array + sample->raw_size;
2057 if (type & PERF_SAMPLE_BRANCH_STACK) {
2058 sz = sample->branch_stack->nr * sizeof(struct branch_entry);
2060 memcpy(array, sample->branch_stack, sz);
2061 array = (void *)array + sz;
2064 if (type & PERF_SAMPLE_REGS_USER) {
2065 if (sample->user_regs.abi) {
2066 *array++ = sample->user_regs.abi;
2067 sz = hweight_long(sample->user_regs.mask) * sizeof(u64);
2068 memcpy(array, sample->user_regs.regs, sz);
2069 array = (void *)array + sz;
2075 if (type & PERF_SAMPLE_STACK_USER) {
2076 sz = sample->user_stack.size;
2079 memcpy(array, sample->user_stack.data, sz);
2080 array = (void *)array + sz;
2085 if (type & PERF_SAMPLE_WEIGHT) {
2086 *array = sample->weight;
2090 if (type & PERF_SAMPLE_DATA_SRC) {
2091 *array = sample->data_src;
2095 if (type & PERF_SAMPLE_TRANSACTION) {
2096 *array = sample->transaction;
2100 if (type & PERF_SAMPLE_REGS_INTR) {
2101 if (sample->intr_regs.abi) {
2102 *array++ = sample->intr_regs.abi;
2103 sz = hweight_long(sample->intr_regs.mask) * sizeof(u64);
2104 memcpy(array, sample->intr_regs.regs, sz);
2105 array = (void *)array + sz;
2114 struct format_field *perf_evsel__field(struct perf_evsel *evsel, const char *name)
2116 return pevent_find_field(evsel->tp_format, name);
2119 void *perf_evsel__rawptr(struct perf_evsel *evsel, struct perf_sample *sample,
2122 struct format_field *field = perf_evsel__field(evsel, name);
2128 offset = field->offset;
2130 if (field->flags & FIELD_IS_DYNAMIC) {
2131 offset = *(int *)(sample->raw_data + field->offset);
2135 return sample->raw_data + offset;
2138 u64 perf_evsel__intval(struct perf_evsel *evsel, struct perf_sample *sample,
2141 struct format_field *field = perf_evsel__field(evsel, name);
2148 ptr = sample->raw_data + field->offset;
2150 switch (field->size) {
2154 value = *(u16 *)ptr;
2157 value = *(u32 *)ptr;
2160 memcpy(&value, ptr, sizeof(u64));
2166 if (!evsel->needs_swap)
2169 switch (field->size) {
2171 return bswap_16(value);
2173 return bswap_32(value);
2175 return bswap_64(value);
2183 static int comma_fprintf(FILE *fp, bool *first, const char *fmt, ...)
2189 ret += fprintf(fp, ",");
2191 ret += fprintf(fp, ":");
2195 va_start(args, fmt);
2196 ret += vfprintf(fp, fmt, args);
2201 static int __print_attr__fprintf(FILE *fp, const char *name, const char *val, void *priv)
2203 return comma_fprintf(fp, (bool *)priv, " %s: %s", name, val);
2206 int perf_evsel__fprintf(struct perf_evsel *evsel,
2207 struct perf_attr_details *details, FILE *fp)
2212 if (details->event_group) {
2213 struct perf_evsel *pos;
2215 if (!perf_evsel__is_group_leader(evsel))
2218 if (evsel->nr_members > 1)
2219 printed += fprintf(fp, "%s{", evsel->group_name ?: "");
2221 printed += fprintf(fp, "%s", perf_evsel__name(evsel));
2222 for_each_group_member(pos, evsel)
2223 printed += fprintf(fp, ",%s", perf_evsel__name(pos));
2225 if (evsel->nr_members > 1)
2226 printed += fprintf(fp, "}");
2230 printed += fprintf(fp, "%s", perf_evsel__name(evsel));
2232 if (details->verbose) {
2233 printed += perf_event_attr__fprintf(fp, &evsel->attr,
2234 __print_attr__fprintf, &first);
2235 } else if (details->freq) {
2236 const char *term = "sample_freq";
2238 if (!evsel->attr.freq)
2239 term = "sample_period";
2241 printed += comma_fprintf(fp, &first, " %s=%" PRIu64,
2242 term, (u64)evsel->attr.sample_freq);
2249 bool perf_evsel__fallback(struct perf_evsel *evsel, int err,
2250 char *msg, size_t msgsize)
2252 if ((err == ENOENT || err == ENXIO || err == ENODEV) &&
2253 evsel->attr.type == PERF_TYPE_HARDWARE &&
2254 evsel->attr.config == PERF_COUNT_HW_CPU_CYCLES) {
2256 * If it's cycles then fall back to hrtimer based
2257 * cpu-clock-tick sw counter, which is always available even if
2260 * PPC returns ENXIO until 2.6.37 (behavior changed with commit
2263 scnprintf(msg, msgsize, "%s",
2264 "The cycles event is not supported, trying to fall back to cpu-clock-ticks");
2266 evsel->attr.type = PERF_TYPE_SOFTWARE;
2267 evsel->attr.config = PERF_COUNT_SW_CPU_CLOCK;
2269 zfree(&evsel->name);
2276 int perf_evsel__open_strerror(struct perf_evsel *evsel, struct target *target,
2277 int err, char *msg, size_t size)
2279 char sbuf[STRERR_BUFSIZE];
2284 return scnprintf(msg, size,
2285 "You may not have permission to collect %sstats.\n"
2286 "Consider tweaking /proc/sys/kernel/perf_event_paranoid:\n"
2287 " -1 - Not paranoid at all\n"
2288 " 0 - Disallow raw tracepoint access for unpriv\n"
2289 " 1 - Disallow cpu events for unpriv\n"
2290 " 2 - Disallow kernel profiling for unpriv",
2291 target->system_wide ? "system-wide " : "");
2293 return scnprintf(msg, size, "The %s event is not supported.",
2294 perf_evsel__name(evsel));
2296 return scnprintf(msg, size, "%s",
2297 "Too many events are opened.\n"
2298 "Probably the maximum number of open file descriptors has been reached.\n"
2299 "Hint: Try again after reducing the number of events.\n"
2300 "Hint: Try increasing the limit with 'ulimit -n <limit>'");
2302 if (target->cpu_list)
2303 return scnprintf(msg, size, "%s",
2304 "No such device - did you specify an out-of-range profile CPU?\n");
2307 if (evsel->attr.precise_ip)
2308 return scnprintf(msg, size, "%s",
2309 "\'precise\' request may not be supported. Try removing 'p' modifier.");
2310 #if defined(__i386__) || defined(__x86_64__)
2311 if (evsel->attr.type == PERF_TYPE_HARDWARE)
2312 return scnprintf(msg, size, "%s",
2313 "No hardware sampling interrupt available.\n"
2314 "No APIC? If so then you can boot the kernel with the \"lapic\" boot parameter to force-enable it.");
2318 if (find_process("oprofiled"))
2319 return scnprintf(msg, size,
2320 "The PMU counters are busy/taken by another profiler.\n"
2321 "We found oprofile daemon running, please stop it and try again.");
2324 if (perf_missing_features.clockid)
2325 return scnprintf(msg, size, "clockid feature not supported.");
2326 if (perf_missing_features.clockid_wrong)
2327 return scnprintf(msg, size, "wrong clockid (%d).", clockid);
2333 return scnprintf(msg, size,
2334 "The sys_perf_event_open() syscall returned with %d (%s) for event (%s).\n"
2335 "/bin/dmesg may provide additional information.\n"
2336 "No CONFIG_PERF_EVENTS=y kernel support configured?\n",
2337 err, strerror_r(err, sbuf, sizeof(sbuf)),
2338 perf_evsel__name(evsel));