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"
41 } perf_missing_features;
43 static clockid_t clockid;
45 static int perf_evsel__no_extra_init(struct perf_evsel *evsel __maybe_unused)
50 static void perf_evsel__no_extra_fini(struct perf_evsel *evsel __maybe_unused)
56 int (*init)(struct perf_evsel *evsel);
57 void (*fini)(struct perf_evsel *evsel);
58 } perf_evsel__object = {
59 .size = sizeof(struct perf_evsel),
60 .init = perf_evsel__no_extra_init,
61 .fini = perf_evsel__no_extra_fini,
64 int perf_evsel__object_config(size_t object_size,
65 int (*init)(struct perf_evsel *evsel),
66 void (*fini)(struct perf_evsel *evsel))
72 if (perf_evsel__object.size > object_size)
75 perf_evsel__object.size = object_size;
79 perf_evsel__object.init = init;
82 perf_evsel__object.fini = fini;
87 #define FD(e, x, y) (*(int *)xyarray__entry(e->fd, x, y))
89 int __perf_evsel__sample_size(u64 sample_type)
91 u64 mask = sample_type & PERF_SAMPLE_MASK;
95 for (i = 0; i < 64; i++) {
96 if (mask & (1ULL << i))
106 * __perf_evsel__calc_id_pos - calculate id_pos.
107 * @sample_type: sample type
109 * This function returns the position of the event id (PERF_SAMPLE_ID or
110 * PERF_SAMPLE_IDENTIFIER) in a sample event i.e. in the array of struct
113 static int __perf_evsel__calc_id_pos(u64 sample_type)
117 if (sample_type & PERF_SAMPLE_IDENTIFIER)
120 if (!(sample_type & PERF_SAMPLE_ID))
123 if (sample_type & PERF_SAMPLE_IP)
126 if (sample_type & PERF_SAMPLE_TID)
129 if (sample_type & PERF_SAMPLE_TIME)
132 if (sample_type & PERF_SAMPLE_ADDR)
139 * __perf_evsel__calc_is_pos - calculate is_pos.
140 * @sample_type: sample type
142 * This function returns the position (counting backwards) of the event id
143 * (PERF_SAMPLE_ID or PERF_SAMPLE_IDENTIFIER) in a non-sample event i.e. if
144 * sample_id_all is used there is an id sample appended to non-sample events.
146 static int __perf_evsel__calc_is_pos(u64 sample_type)
150 if (sample_type & PERF_SAMPLE_IDENTIFIER)
153 if (!(sample_type & PERF_SAMPLE_ID))
156 if (sample_type & PERF_SAMPLE_CPU)
159 if (sample_type & PERF_SAMPLE_STREAM_ID)
165 void perf_evsel__calc_id_pos(struct perf_evsel *evsel)
167 evsel->id_pos = __perf_evsel__calc_id_pos(evsel->attr.sample_type);
168 evsel->is_pos = __perf_evsel__calc_is_pos(evsel->attr.sample_type);
171 void __perf_evsel__set_sample_bit(struct perf_evsel *evsel,
172 enum perf_event_sample_format bit)
174 if (!(evsel->attr.sample_type & bit)) {
175 evsel->attr.sample_type |= bit;
176 evsel->sample_size += sizeof(u64);
177 perf_evsel__calc_id_pos(evsel);
181 void __perf_evsel__reset_sample_bit(struct perf_evsel *evsel,
182 enum perf_event_sample_format bit)
184 if (evsel->attr.sample_type & bit) {
185 evsel->attr.sample_type &= ~bit;
186 evsel->sample_size -= sizeof(u64);
187 perf_evsel__calc_id_pos(evsel);
191 void perf_evsel__set_sample_id(struct perf_evsel *evsel,
192 bool can_sample_identifier)
194 if (can_sample_identifier) {
195 perf_evsel__reset_sample_bit(evsel, ID);
196 perf_evsel__set_sample_bit(evsel, IDENTIFIER);
198 perf_evsel__set_sample_bit(evsel, ID);
200 evsel->attr.read_format |= PERF_FORMAT_ID;
204 * perf_evsel__is_function_event - Return whether given evsel is a function
207 * @evsel - evsel selector to be tested
209 * Return %true if event is function trace event
211 bool perf_evsel__is_function_event(struct perf_evsel *evsel)
213 #define FUNCTION_EVENT "ftrace:function"
215 return evsel->name &&
216 !strncmp(FUNCTION_EVENT, evsel->name, sizeof(FUNCTION_EVENT));
218 #undef FUNCTION_EVENT
221 void perf_evsel__init(struct perf_evsel *evsel,
222 struct perf_event_attr *attr, int idx)
225 evsel->tracking = !idx;
227 evsel->leader = evsel;
230 evsel->evlist = NULL;
232 INIT_LIST_HEAD(&evsel->node);
233 INIT_LIST_HEAD(&evsel->config_terms);
234 perf_evsel__object.init(evsel);
235 evsel->sample_size = __perf_evsel__sample_size(attr->sample_type);
236 perf_evsel__calc_id_pos(evsel);
237 evsel->cmdline_group_boundary = false;
240 struct perf_evsel *perf_evsel__new_idx(struct perf_event_attr *attr, int idx)
242 struct perf_evsel *evsel = zalloc(perf_evsel__object.size);
245 perf_evsel__init(evsel, attr, idx);
247 if (perf_evsel__is_bpf_output(evsel)) {
248 evsel->attr.sample_type |= (PERF_SAMPLE_RAW | PERF_SAMPLE_TIME |
249 PERF_SAMPLE_CPU | PERF_SAMPLE_PERIOD),
250 evsel->attr.sample_period = 1;
256 struct perf_evsel *perf_evsel__new_cycles(void)
258 struct perf_event_attr attr = {
259 .type = PERF_TYPE_HARDWARE,
260 .config = PERF_COUNT_HW_CPU_CYCLES,
262 struct perf_evsel *evsel;
264 event_attr_init(&attr);
266 perf_event_attr__set_max_precise_ip(&attr);
268 evsel = perf_evsel__new(&attr);
272 /* use asprintf() because free(evsel) assumes name is allocated */
273 if (asprintf(&evsel->name, "cycles%.*s",
274 attr.precise_ip ? attr.precise_ip + 1 : 0, ":ppp") < 0)
279 perf_evsel__delete(evsel);
285 * Returns pointer with encoded error via <linux/err.h> interface.
287 struct perf_evsel *perf_evsel__newtp_idx(const char *sys, const char *name, int idx)
289 struct perf_evsel *evsel = zalloc(perf_evsel__object.size);
295 struct perf_event_attr attr = {
296 .type = PERF_TYPE_TRACEPOINT,
297 .sample_type = (PERF_SAMPLE_RAW | PERF_SAMPLE_TIME |
298 PERF_SAMPLE_CPU | PERF_SAMPLE_PERIOD),
301 if (asprintf(&evsel->name, "%s:%s", sys, name) < 0)
304 evsel->tp_format = trace_event__tp_format(sys, name);
305 if (IS_ERR(evsel->tp_format)) {
306 err = PTR_ERR(evsel->tp_format);
310 event_attr_init(&attr);
311 attr.config = evsel->tp_format->id;
312 attr.sample_period = 1;
313 perf_evsel__init(evsel, &attr, idx);
325 const char *perf_evsel__hw_names[PERF_COUNT_HW_MAX] = {
333 "stalled-cycles-frontend",
334 "stalled-cycles-backend",
338 static const char *__perf_evsel__hw_name(u64 config)
340 if (config < PERF_COUNT_HW_MAX && perf_evsel__hw_names[config])
341 return perf_evsel__hw_names[config];
343 return "unknown-hardware";
346 static int perf_evsel__add_modifiers(struct perf_evsel *evsel, char *bf, size_t size)
348 int colon = 0, r = 0;
349 struct perf_event_attr *attr = &evsel->attr;
350 bool exclude_guest_default = false;
352 #define MOD_PRINT(context, mod) do { \
353 if (!attr->exclude_##context) { \
354 if (!colon) colon = ++r; \
355 r += scnprintf(bf + r, size - r, "%c", mod); \
358 if (attr->exclude_kernel || attr->exclude_user || attr->exclude_hv) {
359 MOD_PRINT(kernel, 'k');
360 MOD_PRINT(user, 'u');
362 exclude_guest_default = true;
365 if (attr->precise_ip) {
368 r += scnprintf(bf + r, size - r, "%.*s", attr->precise_ip, "ppp");
369 exclude_guest_default = true;
372 if (attr->exclude_host || attr->exclude_guest == exclude_guest_default) {
373 MOD_PRINT(host, 'H');
374 MOD_PRINT(guest, 'G');
382 static int perf_evsel__hw_name(struct perf_evsel *evsel, char *bf, size_t size)
384 int r = scnprintf(bf, size, "%s", __perf_evsel__hw_name(evsel->attr.config));
385 return r + perf_evsel__add_modifiers(evsel, bf + r, size - r);
388 const char *perf_evsel__sw_names[PERF_COUNT_SW_MAX] = {
401 static const char *__perf_evsel__sw_name(u64 config)
403 if (config < PERF_COUNT_SW_MAX && perf_evsel__sw_names[config])
404 return perf_evsel__sw_names[config];
405 return "unknown-software";
408 static int perf_evsel__sw_name(struct perf_evsel *evsel, char *bf, size_t size)
410 int r = scnprintf(bf, size, "%s", __perf_evsel__sw_name(evsel->attr.config));
411 return r + perf_evsel__add_modifiers(evsel, bf + r, size - r);
414 static int __perf_evsel__bp_name(char *bf, size_t size, u64 addr, u64 type)
418 r = scnprintf(bf, size, "mem:0x%" PRIx64 ":", addr);
420 if (type & HW_BREAKPOINT_R)
421 r += scnprintf(bf + r, size - r, "r");
423 if (type & HW_BREAKPOINT_W)
424 r += scnprintf(bf + r, size - r, "w");
426 if (type & HW_BREAKPOINT_X)
427 r += scnprintf(bf + r, size - r, "x");
432 static int perf_evsel__bp_name(struct perf_evsel *evsel, char *bf, size_t size)
434 struct perf_event_attr *attr = &evsel->attr;
435 int r = __perf_evsel__bp_name(bf, size, attr->bp_addr, attr->bp_type);
436 return r + perf_evsel__add_modifiers(evsel, bf + r, size - r);
439 const char *perf_evsel__hw_cache[PERF_COUNT_HW_CACHE_MAX]
440 [PERF_EVSEL__MAX_ALIASES] = {
441 { "L1-dcache", "l1-d", "l1d", "L1-data", },
442 { "L1-icache", "l1-i", "l1i", "L1-instruction", },
444 { "dTLB", "d-tlb", "Data-TLB", },
445 { "iTLB", "i-tlb", "Instruction-TLB", },
446 { "branch", "branches", "bpu", "btb", "bpc", },
450 const char *perf_evsel__hw_cache_op[PERF_COUNT_HW_CACHE_OP_MAX]
451 [PERF_EVSEL__MAX_ALIASES] = {
452 { "load", "loads", "read", },
453 { "store", "stores", "write", },
454 { "prefetch", "prefetches", "speculative-read", "speculative-load", },
457 const char *perf_evsel__hw_cache_result[PERF_COUNT_HW_CACHE_RESULT_MAX]
458 [PERF_EVSEL__MAX_ALIASES] = {
459 { "refs", "Reference", "ops", "access", },
460 { "misses", "miss", },
463 #define C(x) PERF_COUNT_HW_CACHE_##x
464 #define CACHE_READ (1 << C(OP_READ))
465 #define CACHE_WRITE (1 << C(OP_WRITE))
466 #define CACHE_PREFETCH (1 << C(OP_PREFETCH))
467 #define COP(x) (1 << x)
470 * cache operartion stat
471 * L1I : Read and prefetch only
472 * ITLB and BPU : Read-only
474 static unsigned long perf_evsel__hw_cache_stat[C(MAX)] = {
475 [C(L1D)] = (CACHE_READ | CACHE_WRITE | CACHE_PREFETCH),
476 [C(L1I)] = (CACHE_READ | CACHE_PREFETCH),
477 [C(LL)] = (CACHE_READ | CACHE_WRITE | CACHE_PREFETCH),
478 [C(DTLB)] = (CACHE_READ | CACHE_WRITE | CACHE_PREFETCH),
479 [C(ITLB)] = (CACHE_READ),
480 [C(BPU)] = (CACHE_READ),
481 [C(NODE)] = (CACHE_READ | CACHE_WRITE | CACHE_PREFETCH),
484 bool perf_evsel__is_cache_op_valid(u8 type, u8 op)
486 if (perf_evsel__hw_cache_stat[type] & COP(op))
487 return true; /* valid */
489 return false; /* invalid */
492 int __perf_evsel__hw_cache_type_op_res_name(u8 type, u8 op, u8 result,
493 char *bf, size_t size)
496 return scnprintf(bf, size, "%s-%s-%s", perf_evsel__hw_cache[type][0],
497 perf_evsel__hw_cache_op[op][0],
498 perf_evsel__hw_cache_result[result][0]);
501 return scnprintf(bf, size, "%s-%s", perf_evsel__hw_cache[type][0],
502 perf_evsel__hw_cache_op[op][1]);
505 static int __perf_evsel__hw_cache_name(u64 config, char *bf, size_t size)
507 u8 op, result, type = (config >> 0) & 0xff;
508 const char *err = "unknown-ext-hardware-cache-type";
510 if (type >= PERF_COUNT_HW_CACHE_MAX)
513 op = (config >> 8) & 0xff;
514 err = "unknown-ext-hardware-cache-op";
515 if (op >= PERF_COUNT_HW_CACHE_OP_MAX)
518 result = (config >> 16) & 0xff;
519 err = "unknown-ext-hardware-cache-result";
520 if (result >= PERF_COUNT_HW_CACHE_RESULT_MAX)
523 err = "invalid-cache";
524 if (!perf_evsel__is_cache_op_valid(type, op))
527 return __perf_evsel__hw_cache_type_op_res_name(type, op, result, bf, size);
529 return scnprintf(bf, size, "%s", err);
532 static int perf_evsel__hw_cache_name(struct perf_evsel *evsel, char *bf, size_t size)
534 int ret = __perf_evsel__hw_cache_name(evsel->attr.config, bf, size);
535 return ret + perf_evsel__add_modifiers(evsel, bf + ret, size - ret);
538 static int perf_evsel__raw_name(struct perf_evsel *evsel, char *bf, size_t size)
540 int ret = scnprintf(bf, size, "raw 0x%" PRIx64, evsel->attr.config);
541 return ret + perf_evsel__add_modifiers(evsel, bf + ret, size - ret);
544 const char *perf_evsel__name(struct perf_evsel *evsel)
551 switch (evsel->attr.type) {
553 perf_evsel__raw_name(evsel, bf, sizeof(bf));
556 case PERF_TYPE_HARDWARE:
557 perf_evsel__hw_name(evsel, bf, sizeof(bf));
560 case PERF_TYPE_HW_CACHE:
561 perf_evsel__hw_cache_name(evsel, bf, sizeof(bf));
564 case PERF_TYPE_SOFTWARE:
565 perf_evsel__sw_name(evsel, bf, sizeof(bf));
568 case PERF_TYPE_TRACEPOINT:
569 scnprintf(bf, sizeof(bf), "%s", "unknown tracepoint");
572 case PERF_TYPE_BREAKPOINT:
573 perf_evsel__bp_name(evsel, bf, sizeof(bf));
577 scnprintf(bf, sizeof(bf), "unknown attr type: %d",
582 evsel->name = strdup(bf);
584 return evsel->name ?: "unknown";
587 const char *perf_evsel__group_name(struct perf_evsel *evsel)
589 return evsel->group_name ?: "anon group";
592 int perf_evsel__group_desc(struct perf_evsel *evsel, char *buf, size_t size)
595 struct perf_evsel *pos;
596 const char *group_name = perf_evsel__group_name(evsel);
598 ret = scnprintf(buf, size, "%s", group_name);
600 ret += scnprintf(buf + ret, size - ret, " { %s",
601 perf_evsel__name(evsel));
603 for_each_group_member(pos, evsel)
604 ret += scnprintf(buf + ret, size - ret, ", %s",
605 perf_evsel__name(pos));
607 ret += scnprintf(buf + ret, size - ret, " }");
612 void perf_evsel__config_callchain(struct perf_evsel *evsel,
613 struct record_opts *opts,
614 struct callchain_param *param)
616 bool function = perf_evsel__is_function_event(evsel);
617 struct perf_event_attr *attr = &evsel->attr;
619 perf_evsel__set_sample_bit(evsel, CALLCHAIN);
621 attr->sample_max_stack = param->max_stack;
623 if (param->record_mode == CALLCHAIN_LBR) {
624 if (!opts->branch_stack) {
625 if (attr->exclude_user) {
626 pr_warning("LBR callstack option is only available "
627 "to get user callchain information. "
628 "Falling back to framepointers.\n");
630 perf_evsel__set_sample_bit(evsel, BRANCH_STACK);
631 attr->branch_sample_type = PERF_SAMPLE_BRANCH_USER |
632 PERF_SAMPLE_BRANCH_CALL_STACK |
633 PERF_SAMPLE_BRANCH_NO_CYCLES |
634 PERF_SAMPLE_BRANCH_NO_FLAGS;
637 pr_warning("Cannot use LBR callstack with branch stack. "
638 "Falling back to framepointers.\n");
641 if (param->record_mode == CALLCHAIN_DWARF) {
643 perf_evsel__set_sample_bit(evsel, REGS_USER);
644 perf_evsel__set_sample_bit(evsel, STACK_USER);
645 attr->sample_regs_user = PERF_REGS_MASK;
646 attr->sample_stack_user = param->dump_size;
647 attr->exclude_callchain_user = 1;
649 pr_info("Cannot use DWARF unwind for function trace event,"
650 " falling back to framepointers.\n");
655 pr_info("Disabling user space callchains for function trace event.\n");
656 attr->exclude_callchain_user = 1;
661 perf_evsel__reset_callgraph(struct perf_evsel *evsel,
662 struct callchain_param *param)
664 struct perf_event_attr *attr = &evsel->attr;
666 perf_evsel__reset_sample_bit(evsel, CALLCHAIN);
667 if (param->record_mode == CALLCHAIN_LBR) {
668 perf_evsel__reset_sample_bit(evsel, BRANCH_STACK);
669 attr->branch_sample_type &= ~(PERF_SAMPLE_BRANCH_USER |
670 PERF_SAMPLE_BRANCH_CALL_STACK);
672 if (param->record_mode == CALLCHAIN_DWARF) {
673 perf_evsel__reset_sample_bit(evsel, REGS_USER);
674 perf_evsel__reset_sample_bit(evsel, STACK_USER);
678 static void apply_config_terms(struct perf_evsel *evsel,
679 struct record_opts *opts)
681 struct perf_evsel_config_term *term;
682 struct list_head *config_terms = &evsel->config_terms;
683 struct perf_event_attr *attr = &evsel->attr;
684 struct callchain_param param;
687 const char *callgraph_buf = NULL;
689 /* callgraph default */
690 param.record_mode = callchain_param.record_mode;
692 list_for_each_entry(term, config_terms, list) {
693 switch (term->type) {
694 case PERF_EVSEL__CONFIG_TERM_PERIOD:
695 attr->sample_period = term->val.period;
698 case PERF_EVSEL__CONFIG_TERM_FREQ:
699 attr->sample_freq = term->val.freq;
702 case PERF_EVSEL__CONFIG_TERM_TIME:
704 perf_evsel__set_sample_bit(evsel, TIME);
706 perf_evsel__reset_sample_bit(evsel, TIME);
708 case PERF_EVSEL__CONFIG_TERM_CALLGRAPH:
709 callgraph_buf = term->val.callgraph;
711 case PERF_EVSEL__CONFIG_TERM_STACK_USER:
712 dump_size = term->val.stack_user;
714 case PERF_EVSEL__CONFIG_TERM_MAX_STACK:
715 max_stack = term->val.max_stack;
717 case PERF_EVSEL__CONFIG_TERM_INHERIT:
719 * attr->inherit should has already been set by
720 * perf_evsel__config. If user explicitly set
721 * inherit using config terms, override global
722 * opt->no_inherit setting.
724 attr->inherit = term->val.inherit ? 1 : 0;
726 case PERF_EVSEL__CONFIG_TERM_OVERWRITE:
727 attr->write_backward = term->val.overwrite ? 1 : 0;
734 /* User explicitly set per-event callgraph, clear the old setting and reset. */
735 if ((callgraph_buf != NULL) || (dump_size > 0) || max_stack) {
737 param.max_stack = max_stack;
738 if (callgraph_buf == NULL)
739 callgraph_buf = "fp";
742 /* parse callgraph parameters */
743 if (callgraph_buf != NULL) {
744 if (!strcmp(callgraph_buf, "no")) {
745 param.enabled = false;
746 param.record_mode = CALLCHAIN_NONE;
748 param.enabled = true;
749 if (parse_callchain_record(callgraph_buf, ¶m)) {
750 pr_err("per-event callgraph setting for %s failed. "
751 "Apply callgraph global setting for it\n",
758 dump_size = round_up(dump_size, sizeof(u64));
759 param.dump_size = dump_size;
762 /* If global callgraph set, clear it */
763 if (callchain_param.enabled)
764 perf_evsel__reset_callgraph(evsel, &callchain_param);
766 /* set perf-event callgraph */
768 perf_evsel__config_callchain(evsel, opts, ¶m);
773 * The enable_on_exec/disabled value strategy:
775 * 1) For any type of traced program:
776 * - all independent events and group leaders are disabled
777 * - all group members are enabled
779 * Group members are ruled by group leaders. They need to
780 * be enabled, because the group scheduling relies on that.
782 * 2) For traced programs executed by perf:
783 * - all independent events and group leaders have
785 * - we don't specifically enable or disable any event during
788 * Independent events and group leaders are initially disabled
789 * and get enabled by exec. Group members are ruled by group
790 * leaders as stated in 1).
792 * 3) For traced programs attached by perf (pid/tid):
793 * - we specifically enable or disable all events during
796 * When attaching events to already running traced we
797 * enable/disable events specifically, as there's no
798 * initial traced exec call.
800 void perf_evsel__config(struct perf_evsel *evsel, struct record_opts *opts,
801 struct callchain_param *callchain)
803 struct perf_evsel *leader = evsel->leader;
804 struct perf_event_attr *attr = &evsel->attr;
805 int track = evsel->tracking;
806 bool per_cpu = opts->target.default_per_cpu && !opts->target.per_thread;
808 attr->sample_id_all = perf_missing_features.sample_id_all ? 0 : 1;
809 attr->inherit = !opts->no_inherit;
810 attr->write_backward = opts->overwrite ? 1 : 0;
812 perf_evsel__set_sample_bit(evsel, IP);
813 perf_evsel__set_sample_bit(evsel, TID);
815 if (evsel->sample_read) {
816 perf_evsel__set_sample_bit(evsel, READ);
819 * We need ID even in case of single event, because
820 * PERF_SAMPLE_READ process ID specific data.
822 perf_evsel__set_sample_id(evsel, false);
825 * Apply group format only if we belong to group
826 * with more than one members.
828 if (leader->nr_members > 1) {
829 attr->read_format |= PERF_FORMAT_GROUP;
835 * We default some events to have a default interval. But keep
836 * it a weak assumption overridable by the user.
838 if (!attr->sample_period || (opts->user_freq != UINT_MAX ||
839 opts->user_interval != ULLONG_MAX)) {
841 perf_evsel__set_sample_bit(evsel, PERIOD);
843 attr->sample_freq = opts->freq;
845 attr->sample_period = opts->default_interval;
850 * Disable sampling for all group members other
851 * than leader in case leader 'leads' the sampling.
853 if ((leader != evsel) && leader->sample_read) {
854 attr->sample_freq = 0;
855 attr->sample_period = 0;
858 if (opts->no_samples)
859 attr->sample_freq = 0;
861 if (opts->inherit_stat)
862 attr->inherit_stat = 1;
864 if (opts->sample_address) {
865 perf_evsel__set_sample_bit(evsel, ADDR);
866 attr->mmap_data = track;
870 * We don't allow user space callchains for function trace
871 * event, due to issues with page faults while tracing page
872 * fault handler and its overall trickiness nature.
874 if (perf_evsel__is_function_event(evsel))
875 evsel->attr.exclude_callchain_user = 1;
877 if (callchain && callchain->enabled && !evsel->no_aux_samples)
878 perf_evsel__config_callchain(evsel, opts, callchain);
880 if (opts->sample_intr_regs) {
881 attr->sample_regs_intr = opts->sample_intr_regs;
882 perf_evsel__set_sample_bit(evsel, REGS_INTR);
885 if (target__has_cpu(&opts->target) || opts->sample_cpu)
886 perf_evsel__set_sample_bit(evsel, CPU);
889 perf_evsel__set_sample_bit(evsel, PERIOD);
892 * When the user explicitly disabled time don't force it here.
894 if (opts->sample_time &&
895 (!perf_missing_features.sample_id_all &&
896 (!opts->no_inherit || target__has_cpu(&opts->target) || per_cpu ||
897 opts->sample_time_set)))
898 perf_evsel__set_sample_bit(evsel, TIME);
900 if (opts->raw_samples && !evsel->no_aux_samples) {
901 perf_evsel__set_sample_bit(evsel, TIME);
902 perf_evsel__set_sample_bit(evsel, RAW);
903 perf_evsel__set_sample_bit(evsel, CPU);
906 if (opts->sample_address)
907 perf_evsel__set_sample_bit(evsel, DATA_SRC);
909 if (opts->no_buffering) {
911 attr->wakeup_events = 1;
913 if (opts->branch_stack && !evsel->no_aux_samples) {
914 perf_evsel__set_sample_bit(evsel, BRANCH_STACK);
915 attr->branch_sample_type = opts->branch_stack;
918 if (opts->sample_weight)
919 perf_evsel__set_sample_bit(evsel, WEIGHT);
923 attr->mmap2 = track && !perf_missing_features.mmap2;
926 if (opts->record_switch_events)
927 attr->context_switch = track;
929 if (opts->sample_transaction)
930 perf_evsel__set_sample_bit(evsel, TRANSACTION);
932 if (opts->running_time) {
933 evsel->attr.read_format |=
934 PERF_FORMAT_TOTAL_TIME_ENABLED |
935 PERF_FORMAT_TOTAL_TIME_RUNNING;
939 * XXX see the function comment above
941 * Disabling only independent events or group leaders,
942 * keeping group members enabled.
944 if (perf_evsel__is_group_leader(evsel))
948 * Setting enable_on_exec for independent events and
949 * group leaders for traced executed by perf.
951 if (target__none(&opts->target) && perf_evsel__is_group_leader(evsel) &&
952 !opts->initial_delay)
953 attr->enable_on_exec = 1;
955 if (evsel->immediate) {
957 attr->enable_on_exec = 0;
960 clockid = opts->clockid;
961 if (opts->use_clockid) {
962 attr->use_clockid = 1;
963 attr->clockid = opts->clockid;
966 if (evsel->precise_max)
967 perf_event_attr__set_max_precise_ip(attr);
969 if (opts->all_user) {
970 attr->exclude_kernel = 1;
971 attr->exclude_user = 0;
974 if (opts->all_kernel) {
975 attr->exclude_kernel = 0;
976 attr->exclude_user = 1;
980 * Apply event specific term settings,
981 * it overloads any global configuration.
983 apply_config_terms(evsel, opts);
986 static int perf_evsel__alloc_fd(struct perf_evsel *evsel, int ncpus, int nthreads)
988 if (evsel->system_wide)
991 evsel->fd = xyarray__new(ncpus, nthreads, sizeof(int));
995 for (cpu = 0; cpu < ncpus; cpu++) {
996 for (thread = 0; thread < nthreads; thread++) {
997 FD(evsel, cpu, thread) = -1;
1002 return evsel->fd != NULL ? 0 : -ENOMEM;
1005 static int perf_evsel__run_ioctl(struct perf_evsel *evsel, int ncpus, int nthreads,
1010 if (evsel->system_wide)
1013 for (cpu = 0; cpu < ncpus; cpu++) {
1014 for (thread = 0; thread < nthreads; thread++) {
1015 int fd = FD(evsel, cpu, thread),
1016 err = ioctl(fd, ioc, arg);
1026 int perf_evsel__apply_filter(struct perf_evsel *evsel, int ncpus, int nthreads,
1029 return perf_evsel__run_ioctl(evsel, ncpus, nthreads,
1030 PERF_EVENT_IOC_SET_FILTER,
1034 int perf_evsel__set_filter(struct perf_evsel *evsel, const char *filter)
1036 char *new_filter = strdup(filter);
1038 if (new_filter != NULL) {
1039 free(evsel->filter);
1040 evsel->filter = new_filter;
1047 static int perf_evsel__append_filter(struct perf_evsel *evsel,
1048 const char *fmt, const char *filter)
1052 if (evsel->filter == NULL)
1053 return perf_evsel__set_filter(evsel, filter);
1055 if (asprintf(&new_filter, fmt, evsel->filter, filter) > 0) {
1056 free(evsel->filter);
1057 evsel->filter = new_filter;
1064 int perf_evsel__append_tp_filter(struct perf_evsel *evsel, const char *filter)
1066 return perf_evsel__append_filter(evsel, "(%s) && (%s)", filter);
1069 int perf_evsel__append_addr_filter(struct perf_evsel *evsel, const char *filter)
1071 return perf_evsel__append_filter(evsel, "%s,%s", filter);
1074 int perf_evsel__enable(struct perf_evsel *evsel)
1076 int nthreads = thread_map__nr(evsel->threads);
1077 int ncpus = cpu_map__nr(evsel->cpus);
1079 return perf_evsel__run_ioctl(evsel, ncpus, nthreads,
1080 PERF_EVENT_IOC_ENABLE,
1084 int perf_evsel__disable(struct perf_evsel *evsel)
1086 int nthreads = thread_map__nr(evsel->threads);
1087 int ncpus = cpu_map__nr(evsel->cpus);
1089 return perf_evsel__run_ioctl(evsel, ncpus, nthreads,
1090 PERF_EVENT_IOC_DISABLE,
1094 int perf_evsel__alloc_id(struct perf_evsel *evsel, int ncpus, int nthreads)
1096 if (ncpus == 0 || nthreads == 0)
1099 if (evsel->system_wide)
1102 evsel->sample_id = xyarray__new(ncpus, nthreads, sizeof(struct perf_sample_id));
1103 if (evsel->sample_id == NULL)
1106 evsel->id = zalloc(ncpus * nthreads * sizeof(u64));
1107 if (evsel->id == NULL) {
1108 xyarray__delete(evsel->sample_id);
1109 evsel->sample_id = NULL;
1116 static void perf_evsel__free_fd(struct perf_evsel *evsel)
1118 xyarray__delete(evsel->fd);
1122 static void perf_evsel__free_id(struct perf_evsel *evsel)
1124 xyarray__delete(evsel->sample_id);
1125 evsel->sample_id = NULL;
1129 static void perf_evsel__free_config_terms(struct perf_evsel *evsel)
1131 struct perf_evsel_config_term *term, *h;
1133 list_for_each_entry_safe(term, h, &evsel->config_terms, list) {
1134 list_del(&term->list);
1139 void perf_evsel__close_fd(struct perf_evsel *evsel, int ncpus, int nthreads)
1143 if (evsel->system_wide)
1146 for (cpu = 0; cpu < ncpus; cpu++)
1147 for (thread = 0; thread < nthreads; ++thread) {
1148 close(FD(evsel, cpu, thread));
1149 FD(evsel, cpu, thread) = -1;
1153 void perf_evsel__exit(struct perf_evsel *evsel)
1155 assert(list_empty(&evsel->node));
1156 assert(evsel->evlist == NULL);
1157 perf_evsel__free_fd(evsel);
1158 perf_evsel__free_id(evsel);
1159 perf_evsel__free_config_terms(evsel);
1160 close_cgroup(evsel->cgrp);
1161 cpu_map__put(evsel->cpus);
1162 cpu_map__put(evsel->own_cpus);
1163 thread_map__put(evsel->threads);
1164 zfree(&evsel->group_name);
1165 zfree(&evsel->name);
1166 perf_evsel__object.fini(evsel);
1169 void perf_evsel__delete(struct perf_evsel *evsel)
1171 perf_evsel__exit(evsel);
1175 void perf_evsel__compute_deltas(struct perf_evsel *evsel, int cpu, int thread,
1176 struct perf_counts_values *count)
1178 struct perf_counts_values tmp;
1180 if (!evsel->prev_raw_counts)
1184 tmp = evsel->prev_raw_counts->aggr;
1185 evsel->prev_raw_counts->aggr = *count;
1187 tmp = *perf_counts(evsel->prev_raw_counts, cpu, thread);
1188 *perf_counts(evsel->prev_raw_counts, cpu, thread) = *count;
1191 count->val = count->val - tmp.val;
1192 count->ena = count->ena - tmp.ena;
1193 count->run = count->run - tmp.run;
1196 void perf_counts_values__scale(struct perf_counts_values *count,
1197 bool scale, s8 *pscaled)
1202 if (count->run == 0) {
1205 } else if (count->run < count->ena) {
1207 count->val = (u64)((double) count->val * count->ena / count->run + 0.5);
1210 count->ena = count->run = 0;
1216 int perf_evsel__read(struct perf_evsel *evsel, int cpu, int thread,
1217 struct perf_counts_values *count)
1219 memset(count, 0, sizeof(*count));
1221 if (FD(evsel, cpu, thread) < 0)
1224 if (readn(FD(evsel, cpu, thread), count, sizeof(*count)) < 0)
1230 int __perf_evsel__read_on_cpu(struct perf_evsel *evsel,
1231 int cpu, int thread, bool scale)
1233 struct perf_counts_values count;
1234 size_t nv = scale ? 3 : 1;
1236 if (FD(evsel, cpu, thread) < 0)
1239 if (evsel->counts == NULL && perf_evsel__alloc_counts(evsel, cpu + 1, thread + 1) < 0)
1242 if (readn(FD(evsel, cpu, thread), &count, nv * sizeof(u64)) < 0)
1245 perf_evsel__compute_deltas(evsel, cpu, thread, &count);
1246 perf_counts_values__scale(&count, scale, NULL);
1247 *perf_counts(evsel->counts, cpu, thread) = count;
1251 static int get_group_fd(struct perf_evsel *evsel, int cpu, int thread)
1253 struct perf_evsel *leader = evsel->leader;
1256 if (perf_evsel__is_group_leader(evsel))
1260 * Leader must be already processed/open,
1261 * if not it's a bug.
1263 BUG_ON(!leader->fd);
1265 fd = FD(leader, cpu, thread);
1276 static void __p_bits(char *buf, size_t size, u64 value, struct bit_names *bits)
1278 bool first_bit = true;
1282 if (value & bits[i].bit) {
1283 buf += scnprintf(buf, size, "%s%s", first_bit ? "" : "|", bits[i].name);
1286 } while (bits[++i].name != NULL);
1289 static void __p_sample_type(char *buf, size_t size, u64 value)
1291 #define bit_name(n) { PERF_SAMPLE_##n, #n }
1292 struct bit_names bits[] = {
1293 bit_name(IP), bit_name(TID), bit_name(TIME), bit_name(ADDR),
1294 bit_name(READ), bit_name(CALLCHAIN), bit_name(ID), bit_name(CPU),
1295 bit_name(PERIOD), bit_name(STREAM_ID), bit_name(RAW),
1296 bit_name(BRANCH_STACK), bit_name(REGS_USER), bit_name(STACK_USER),
1297 bit_name(IDENTIFIER), bit_name(REGS_INTR), bit_name(DATA_SRC),
1302 __p_bits(buf, size, value, bits);
1305 static void __p_branch_sample_type(char *buf, size_t size, u64 value)
1307 #define bit_name(n) { PERF_SAMPLE_BRANCH_##n, #n }
1308 struct bit_names bits[] = {
1309 bit_name(USER), bit_name(KERNEL), bit_name(HV), bit_name(ANY),
1310 bit_name(ANY_CALL), bit_name(ANY_RETURN), bit_name(IND_CALL),
1311 bit_name(ABORT_TX), bit_name(IN_TX), bit_name(NO_TX),
1312 bit_name(COND), bit_name(CALL_STACK), bit_name(IND_JUMP),
1313 bit_name(CALL), bit_name(NO_FLAGS), bit_name(NO_CYCLES),
1317 __p_bits(buf, size, value, bits);
1320 static void __p_read_format(char *buf, size_t size, u64 value)
1322 #define bit_name(n) { PERF_FORMAT_##n, #n }
1323 struct bit_names bits[] = {
1324 bit_name(TOTAL_TIME_ENABLED), bit_name(TOTAL_TIME_RUNNING),
1325 bit_name(ID), bit_name(GROUP),
1329 __p_bits(buf, size, value, bits);
1332 #define BUF_SIZE 1024
1334 #define p_hex(val) snprintf(buf, BUF_SIZE, "%#"PRIx64, (uint64_t)(val))
1335 #define p_unsigned(val) snprintf(buf, BUF_SIZE, "%"PRIu64, (uint64_t)(val))
1336 #define p_signed(val) snprintf(buf, BUF_SIZE, "%"PRId64, (int64_t)(val))
1337 #define p_sample_type(val) __p_sample_type(buf, BUF_SIZE, val)
1338 #define p_branch_sample_type(val) __p_branch_sample_type(buf, BUF_SIZE, val)
1339 #define p_read_format(val) __p_read_format(buf, BUF_SIZE, val)
1341 #define PRINT_ATTRn(_n, _f, _p) \
1345 ret += attr__fprintf(fp, _n, buf, priv);\
1349 #define PRINT_ATTRf(_f, _p) PRINT_ATTRn(#_f, _f, _p)
1351 int perf_event_attr__fprintf(FILE *fp, struct perf_event_attr *attr,
1352 attr__fprintf_f attr__fprintf, void *priv)
1357 PRINT_ATTRf(type, p_unsigned);
1358 PRINT_ATTRf(size, p_unsigned);
1359 PRINT_ATTRf(config, p_hex);
1360 PRINT_ATTRn("{ sample_period, sample_freq }", sample_period, p_unsigned);
1361 PRINT_ATTRf(sample_type, p_sample_type);
1362 PRINT_ATTRf(read_format, p_read_format);
1364 PRINT_ATTRf(disabled, p_unsigned);
1365 PRINT_ATTRf(inherit, p_unsigned);
1366 PRINT_ATTRf(pinned, p_unsigned);
1367 PRINT_ATTRf(exclusive, p_unsigned);
1368 PRINT_ATTRf(exclude_user, p_unsigned);
1369 PRINT_ATTRf(exclude_kernel, p_unsigned);
1370 PRINT_ATTRf(exclude_hv, p_unsigned);
1371 PRINT_ATTRf(exclude_idle, p_unsigned);
1372 PRINT_ATTRf(mmap, p_unsigned);
1373 PRINT_ATTRf(comm, p_unsigned);
1374 PRINT_ATTRf(freq, p_unsigned);
1375 PRINT_ATTRf(inherit_stat, p_unsigned);
1376 PRINT_ATTRf(enable_on_exec, p_unsigned);
1377 PRINT_ATTRf(task, p_unsigned);
1378 PRINT_ATTRf(watermark, p_unsigned);
1379 PRINT_ATTRf(precise_ip, p_unsigned);
1380 PRINT_ATTRf(mmap_data, p_unsigned);
1381 PRINT_ATTRf(sample_id_all, p_unsigned);
1382 PRINT_ATTRf(exclude_host, p_unsigned);
1383 PRINT_ATTRf(exclude_guest, p_unsigned);
1384 PRINT_ATTRf(exclude_callchain_kernel, p_unsigned);
1385 PRINT_ATTRf(exclude_callchain_user, p_unsigned);
1386 PRINT_ATTRf(mmap2, p_unsigned);
1387 PRINT_ATTRf(comm_exec, p_unsigned);
1388 PRINT_ATTRf(use_clockid, p_unsigned);
1389 PRINT_ATTRf(context_switch, p_unsigned);
1390 PRINT_ATTRf(write_backward, p_unsigned);
1392 PRINT_ATTRn("{ wakeup_events, wakeup_watermark }", wakeup_events, p_unsigned);
1393 PRINT_ATTRf(bp_type, p_unsigned);
1394 PRINT_ATTRn("{ bp_addr, config1 }", bp_addr, p_hex);
1395 PRINT_ATTRn("{ bp_len, config2 }", bp_len, p_hex);
1396 PRINT_ATTRf(branch_sample_type, p_branch_sample_type);
1397 PRINT_ATTRf(sample_regs_user, p_hex);
1398 PRINT_ATTRf(sample_stack_user, p_unsigned);
1399 PRINT_ATTRf(clockid, p_signed);
1400 PRINT_ATTRf(sample_regs_intr, p_hex);
1401 PRINT_ATTRf(aux_watermark, p_unsigned);
1402 PRINT_ATTRf(sample_max_stack, p_unsigned);
1407 static int __open_attr__fprintf(FILE *fp, const char *name, const char *val,
1408 void *priv __attribute__((unused)))
1410 return fprintf(fp, " %-32s %s\n", name, val);
1413 static int __perf_evsel__open(struct perf_evsel *evsel, struct cpu_map *cpus,
1414 struct thread_map *threads)
1416 int cpu, thread, nthreads;
1417 unsigned long flags = PERF_FLAG_FD_CLOEXEC;
1419 enum { NO_CHANGE, SET_TO_MAX, INCREASED_MAX } set_rlimit = NO_CHANGE;
1421 if (perf_missing_features.write_backward && evsel->attr.write_backward)
1424 if (evsel->system_wide)
1427 nthreads = threads->nr;
1429 if (evsel->fd == NULL &&
1430 perf_evsel__alloc_fd(evsel, cpus->nr, nthreads) < 0)
1434 flags |= PERF_FLAG_PID_CGROUP;
1435 pid = evsel->cgrp->fd;
1438 fallback_missing_features:
1439 if (perf_missing_features.clockid_wrong)
1440 evsel->attr.clockid = CLOCK_MONOTONIC; /* should always work */
1441 if (perf_missing_features.clockid) {
1442 evsel->attr.use_clockid = 0;
1443 evsel->attr.clockid = 0;
1445 if (perf_missing_features.cloexec)
1446 flags &= ~(unsigned long)PERF_FLAG_FD_CLOEXEC;
1447 if (perf_missing_features.mmap2)
1448 evsel->attr.mmap2 = 0;
1449 if (perf_missing_features.exclude_guest)
1450 evsel->attr.exclude_guest = evsel->attr.exclude_host = 0;
1451 if (perf_missing_features.lbr_flags)
1452 evsel->attr.branch_sample_type &= ~(PERF_SAMPLE_BRANCH_NO_FLAGS |
1453 PERF_SAMPLE_BRANCH_NO_CYCLES);
1455 if (perf_missing_features.sample_id_all)
1456 evsel->attr.sample_id_all = 0;
1459 fprintf(stderr, "%.60s\n", graph_dotted_line);
1460 fprintf(stderr, "perf_event_attr:\n");
1461 perf_event_attr__fprintf(stderr, &evsel->attr, __open_attr__fprintf, NULL);
1462 fprintf(stderr, "%.60s\n", graph_dotted_line);
1465 for (cpu = 0; cpu < cpus->nr; cpu++) {
1467 for (thread = 0; thread < nthreads; thread++) {
1470 if (!evsel->cgrp && !evsel->system_wide)
1471 pid = thread_map__pid(threads, thread);
1473 group_fd = get_group_fd(evsel, cpu, thread);
1475 pr_debug2("sys_perf_event_open: pid %d cpu %d group_fd %d flags %#lx\n",
1476 pid, cpus->map[cpu], group_fd, flags);
1478 FD(evsel, cpu, thread) = sys_perf_event_open(&evsel->attr,
1482 if (FD(evsel, cpu, thread) < 0) {
1484 pr_debug2("sys_perf_event_open failed, error %d\n",
1489 if (evsel->bpf_fd >= 0) {
1490 int evt_fd = FD(evsel, cpu, thread);
1491 int bpf_fd = evsel->bpf_fd;
1494 PERF_EVENT_IOC_SET_BPF,
1496 if (err && errno != EEXIST) {
1497 pr_err("failed to attach bpf fd %d: %s\n",
1498 bpf_fd, strerror(errno));
1504 set_rlimit = NO_CHANGE;
1507 * If we succeeded but had to kill clockid, fail and
1508 * have perf_evsel__open_strerror() print us a nice
1511 if (perf_missing_features.clockid ||
1512 perf_missing_features.clockid_wrong) {
1523 * perf stat needs between 5 and 22 fds per CPU. When we run out
1524 * of them try to increase the limits.
1526 if (err == -EMFILE && set_rlimit < INCREASED_MAX) {
1528 int old_errno = errno;
1530 if (getrlimit(RLIMIT_NOFILE, &l) == 0) {
1531 if (set_rlimit == NO_CHANGE)
1532 l.rlim_cur = l.rlim_max;
1534 l.rlim_cur = l.rlim_max + 1000;
1535 l.rlim_max = l.rlim_cur;
1537 if (setrlimit(RLIMIT_NOFILE, &l) == 0) {
1546 if (err != -EINVAL || cpu > 0 || thread > 0)
1550 * Must probe features in the order they were added to the
1551 * perf_event_attr interface.
1553 if (!perf_missing_features.write_backward && evsel->attr.write_backward) {
1554 perf_missing_features.write_backward = true;
1556 } else if (!perf_missing_features.clockid_wrong && evsel->attr.use_clockid) {
1557 perf_missing_features.clockid_wrong = true;
1558 goto fallback_missing_features;
1559 } else if (!perf_missing_features.clockid && evsel->attr.use_clockid) {
1560 perf_missing_features.clockid = true;
1561 goto fallback_missing_features;
1562 } else if (!perf_missing_features.cloexec && (flags & PERF_FLAG_FD_CLOEXEC)) {
1563 perf_missing_features.cloexec = true;
1564 goto fallback_missing_features;
1565 } else if (!perf_missing_features.mmap2 && evsel->attr.mmap2) {
1566 perf_missing_features.mmap2 = true;
1567 goto fallback_missing_features;
1568 } else if (!perf_missing_features.exclude_guest &&
1569 (evsel->attr.exclude_guest || evsel->attr.exclude_host)) {
1570 perf_missing_features.exclude_guest = true;
1571 goto fallback_missing_features;
1572 } else if (!perf_missing_features.sample_id_all) {
1573 perf_missing_features.sample_id_all = true;
1574 goto retry_sample_id;
1575 } else if (!perf_missing_features.lbr_flags &&
1576 (evsel->attr.branch_sample_type &
1577 (PERF_SAMPLE_BRANCH_NO_CYCLES |
1578 PERF_SAMPLE_BRANCH_NO_FLAGS))) {
1579 perf_missing_features.lbr_flags = true;
1580 goto fallback_missing_features;
1584 while (--thread >= 0) {
1585 close(FD(evsel, cpu, thread));
1586 FD(evsel, cpu, thread) = -1;
1589 } while (--cpu >= 0);
1593 void perf_evsel__close(struct perf_evsel *evsel, int ncpus, int nthreads)
1595 if (evsel->fd == NULL)
1598 perf_evsel__close_fd(evsel, ncpus, nthreads);
1599 perf_evsel__free_fd(evsel);
1611 struct thread_map map;
1613 } empty_thread_map = {
1618 int perf_evsel__open(struct perf_evsel *evsel, struct cpu_map *cpus,
1619 struct thread_map *threads)
1622 /* Work around old compiler warnings about strict aliasing */
1623 cpus = &empty_cpu_map.map;
1626 if (threads == NULL)
1627 threads = &empty_thread_map.map;
1629 return __perf_evsel__open(evsel, cpus, threads);
1632 int perf_evsel__open_per_cpu(struct perf_evsel *evsel,
1633 struct cpu_map *cpus)
1635 return __perf_evsel__open(evsel, cpus, &empty_thread_map.map);
1638 int perf_evsel__open_per_thread(struct perf_evsel *evsel,
1639 struct thread_map *threads)
1641 return __perf_evsel__open(evsel, &empty_cpu_map.map, threads);
1644 static int perf_evsel__parse_id_sample(const struct perf_evsel *evsel,
1645 const union perf_event *event,
1646 struct perf_sample *sample)
1648 u64 type = evsel->attr.sample_type;
1649 const u64 *array = event->sample.array;
1650 bool swapped = evsel->needs_swap;
1653 array += ((event->header.size -
1654 sizeof(event->header)) / sizeof(u64)) - 1;
1656 if (type & PERF_SAMPLE_IDENTIFIER) {
1657 sample->id = *array;
1661 if (type & PERF_SAMPLE_CPU) {
1664 /* undo swap of u64, then swap on individual u32s */
1665 u.val64 = bswap_64(u.val64);
1666 u.val32[0] = bswap_32(u.val32[0]);
1669 sample->cpu = u.val32[0];
1673 if (type & PERF_SAMPLE_STREAM_ID) {
1674 sample->stream_id = *array;
1678 if (type & PERF_SAMPLE_ID) {
1679 sample->id = *array;
1683 if (type & PERF_SAMPLE_TIME) {
1684 sample->time = *array;
1688 if (type & PERF_SAMPLE_TID) {
1691 /* undo swap of u64, then swap on individual u32s */
1692 u.val64 = bswap_64(u.val64);
1693 u.val32[0] = bswap_32(u.val32[0]);
1694 u.val32[1] = bswap_32(u.val32[1]);
1697 sample->pid = u.val32[0];
1698 sample->tid = u.val32[1];
1705 static inline bool overflow(const void *endp, u16 max_size, const void *offset,
1708 return size > max_size || offset + size > endp;
1711 #define OVERFLOW_CHECK(offset, size, max_size) \
1713 if (overflow(endp, (max_size), (offset), (size))) \
1717 #define OVERFLOW_CHECK_u64(offset) \
1718 OVERFLOW_CHECK(offset, sizeof(u64), sizeof(u64))
1720 int perf_evsel__parse_sample(struct perf_evsel *evsel, union perf_event *event,
1721 struct perf_sample *data)
1723 u64 type = evsel->attr.sample_type;
1724 bool swapped = evsel->needs_swap;
1726 u16 max_size = event->header.size;
1727 const void *endp = (void *)event + max_size;
1731 * used for cross-endian analysis. See git commit 65014ab3
1732 * for why this goofiness is needed.
1736 memset(data, 0, sizeof(*data));
1737 data->cpu = data->pid = data->tid = -1;
1738 data->stream_id = data->id = data->time = -1ULL;
1739 data->period = evsel->attr.sample_period;
1740 data->cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK;
1742 if (event->header.type != PERF_RECORD_SAMPLE) {
1743 if (!evsel->attr.sample_id_all)
1745 return perf_evsel__parse_id_sample(evsel, event, data);
1748 array = event->sample.array;
1751 * The evsel's sample_size is based on PERF_SAMPLE_MASK which includes
1752 * up to PERF_SAMPLE_PERIOD. After that overflow() must be used to
1753 * check the format does not go past the end of the event.
1755 if (evsel->sample_size + sizeof(event->header) > event->header.size)
1759 if (type & PERF_SAMPLE_IDENTIFIER) {
1764 if (type & PERF_SAMPLE_IP) {
1769 if (type & PERF_SAMPLE_TID) {
1772 /* undo swap of u64, then swap on individual u32s */
1773 u.val64 = bswap_64(u.val64);
1774 u.val32[0] = bswap_32(u.val32[0]);
1775 u.val32[1] = bswap_32(u.val32[1]);
1778 data->pid = u.val32[0];
1779 data->tid = u.val32[1];
1783 if (type & PERF_SAMPLE_TIME) {
1784 data->time = *array;
1789 if (type & PERF_SAMPLE_ADDR) {
1790 data->addr = *array;
1794 if (type & PERF_SAMPLE_ID) {
1799 if (type & PERF_SAMPLE_STREAM_ID) {
1800 data->stream_id = *array;
1804 if (type & PERF_SAMPLE_CPU) {
1808 /* undo swap of u64, then swap on individual u32s */
1809 u.val64 = bswap_64(u.val64);
1810 u.val32[0] = bswap_32(u.val32[0]);
1813 data->cpu = u.val32[0];
1817 if (type & PERF_SAMPLE_PERIOD) {
1818 data->period = *array;
1822 if (type & PERF_SAMPLE_READ) {
1823 u64 read_format = evsel->attr.read_format;
1825 OVERFLOW_CHECK_u64(array);
1826 if (read_format & PERF_FORMAT_GROUP)
1827 data->read.group.nr = *array;
1829 data->read.one.value = *array;
1833 if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED) {
1834 OVERFLOW_CHECK_u64(array);
1835 data->read.time_enabled = *array;
1839 if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING) {
1840 OVERFLOW_CHECK_u64(array);
1841 data->read.time_running = *array;
1845 /* PERF_FORMAT_ID is forced for PERF_SAMPLE_READ */
1846 if (read_format & PERF_FORMAT_GROUP) {
1847 const u64 max_group_nr = UINT64_MAX /
1848 sizeof(struct sample_read_value);
1850 if (data->read.group.nr > max_group_nr)
1852 sz = data->read.group.nr *
1853 sizeof(struct sample_read_value);
1854 OVERFLOW_CHECK(array, sz, max_size);
1855 data->read.group.values =
1856 (struct sample_read_value *)array;
1857 array = (void *)array + sz;
1859 OVERFLOW_CHECK_u64(array);
1860 data->read.one.id = *array;
1865 if (type & PERF_SAMPLE_CALLCHAIN) {
1866 const u64 max_callchain_nr = UINT64_MAX / sizeof(u64);
1868 OVERFLOW_CHECK_u64(array);
1869 data->callchain = (struct ip_callchain *)array++;
1870 if (data->callchain->nr > max_callchain_nr)
1872 sz = data->callchain->nr * sizeof(u64);
1873 OVERFLOW_CHECK(array, sz, max_size);
1874 array = (void *)array + sz;
1877 if (type & PERF_SAMPLE_RAW) {
1878 OVERFLOW_CHECK_u64(array);
1880 if (WARN_ONCE(swapped,
1881 "Endianness of raw data not corrected!\n")) {
1882 /* undo swap of u64, then swap on individual u32s */
1883 u.val64 = bswap_64(u.val64);
1884 u.val32[0] = bswap_32(u.val32[0]);
1885 u.val32[1] = bswap_32(u.val32[1]);
1887 data->raw_size = u.val32[0];
1888 array = (void *)array + sizeof(u32);
1890 OVERFLOW_CHECK(array, data->raw_size, max_size);
1891 data->raw_data = (void *)array;
1892 array = (void *)array + data->raw_size;
1895 if (type & PERF_SAMPLE_BRANCH_STACK) {
1896 const u64 max_branch_nr = UINT64_MAX /
1897 sizeof(struct branch_entry);
1899 OVERFLOW_CHECK_u64(array);
1900 data->branch_stack = (struct branch_stack *)array++;
1902 if (data->branch_stack->nr > max_branch_nr)
1904 sz = data->branch_stack->nr * sizeof(struct branch_entry);
1905 OVERFLOW_CHECK(array, sz, max_size);
1906 array = (void *)array + sz;
1909 if (type & PERF_SAMPLE_REGS_USER) {
1910 OVERFLOW_CHECK_u64(array);
1911 data->user_regs.abi = *array;
1914 if (data->user_regs.abi) {
1915 u64 mask = evsel->attr.sample_regs_user;
1917 sz = hweight_long(mask) * sizeof(u64);
1918 OVERFLOW_CHECK(array, sz, max_size);
1919 data->user_regs.mask = mask;
1920 data->user_regs.regs = (u64 *)array;
1921 array = (void *)array + sz;
1925 if (type & PERF_SAMPLE_STACK_USER) {
1926 OVERFLOW_CHECK_u64(array);
1929 data->user_stack.offset = ((char *)(array - 1)
1933 data->user_stack.size = 0;
1935 OVERFLOW_CHECK(array, sz, max_size);
1936 data->user_stack.data = (char *)array;
1937 array = (void *)array + sz;
1938 OVERFLOW_CHECK_u64(array);
1939 data->user_stack.size = *array++;
1940 if (WARN_ONCE(data->user_stack.size > sz,
1941 "user stack dump failure\n"))
1946 if (type & PERF_SAMPLE_WEIGHT) {
1947 OVERFLOW_CHECK_u64(array);
1948 data->weight = *array;
1952 data->data_src = PERF_MEM_DATA_SRC_NONE;
1953 if (type & PERF_SAMPLE_DATA_SRC) {
1954 OVERFLOW_CHECK_u64(array);
1955 data->data_src = *array;
1959 data->transaction = 0;
1960 if (type & PERF_SAMPLE_TRANSACTION) {
1961 OVERFLOW_CHECK_u64(array);
1962 data->transaction = *array;
1966 data->intr_regs.abi = PERF_SAMPLE_REGS_ABI_NONE;
1967 if (type & PERF_SAMPLE_REGS_INTR) {
1968 OVERFLOW_CHECK_u64(array);
1969 data->intr_regs.abi = *array;
1972 if (data->intr_regs.abi != PERF_SAMPLE_REGS_ABI_NONE) {
1973 u64 mask = evsel->attr.sample_regs_intr;
1975 sz = hweight_long(mask) * sizeof(u64);
1976 OVERFLOW_CHECK(array, sz, max_size);
1977 data->intr_regs.mask = mask;
1978 data->intr_regs.regs = (u64 *)array;
1979 array = (void *)array + sz;
1986 size_t perf_event__sample_event_size(const struct perf_sample *sample, u64 type,
1989 size_t sz, result = sizeof(struct sample_event);
1991 if (type & PERF_SAMPLE_IDENTIFIER)
1992 result += sizeof(u64);
1994 if (type & PERF_SAMPLE_IP)
1995 result += sizeof(u64);
1997 if (type & PERF_SAMPLE_TID)
1998 result += sizeof(u64);
2000 if (type & PERF_SAMPLE_TIME)
2001 result += sizeof(u64);
2003 if (type & PERF_SAMPLE_ADDR)
2004 result += sizeof(u64);
2006 if (type & PERF_SAMPLE_ID)
2007 result += sizeof(u64);
2009 if (type & PERF_SAMPLE_STREAM_ID)
2010 result += sizeof(u64);
2012 if (type & PERF_SAMPLE_CPU)
2013 result += sizeof(u64);
2015 if (type & PERF_SAMPLE_PERIOD)
2016 result += sizeof(u64);
2018 if (type & PERF_SAMPLE_READ) {
2019 result += sizeof(u64);
2020 if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED)
2021 result += sizeof(u64);
2022 if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING)
2023 result += sizeof(u64);
2024 /* PERF_FORMAT_ID is forced for PERF_SAMPLE_READ */
2025 if (read_format & PERF_FORMAT_GROUP) {
2026 sz = sample->read.group.nr *
2027 sizeof(struct sample_read_value);
2030 result += sizeof(u64);
2034 if (type & PERF_SAMPLE_CALLCHAIN) {
2035 sz = (sample->callchain->nr + 1) * sizeof(u64);
2039 if (type & PERF_SAMPLE_RAW) {
2040 result += sizeof(u32);
2041 result += sample->raw_size;
2044 if (type & PERF_SAMPLE_BRANCH_STACK) {
2045 sz = sample->branch_stack->nr * sizeof(struct branch_entry);
2050 if (type & PERF_SAMPLE_REGS_USER) {
2051 if (sample->user_regs.abi) {
2052 result += sizeof(u64);
2053 sz = hweight_long(sample->user_regs.mask) * sizeof(u64);
2056 result += sizeof(u64);
2060 if (type & PERF_SAMPLE_STACK_USER) {
2061 sz = sample->user_stack.size;
2062 result += sizeof(u64);
2065 result += sizeof(u64);
2069 if (type & PERF_SAMPLE_WEIGHT)
2070 result += sizeof(u64);
2072 if (type & PERF_SAMPLE_DATA_SRC)
2073 result += sizeof(u64);
2075 if (type & PERF_SAMPLE_TRANSACTION)
2076 result += sizeof(u64);
2078 if (type & PERF_SAMPLE_REGS_INTR) {
2079 if (sample->intr_regs.abi) {
2080 result += sizeof(u64);
2081 sz = hweight_long(sample->intr_regs.mask) * sizeof(u64);
2084 result += sizeof(u64);
2091 int perf_event__synthesize_sample(union perf_event *event, u64 type,
2093 const struct perf_sample *sample,
2099 * used for cross-endian analysis. See git commit 65014ab3
2100 * for why this goofiness is needed.
2104 array = event->sample.array;
2106 if (type & PERF_SAMPLE_IDENTIFIER) {
2107 *array = sample->id;
2111 if (type & PERF_SAMPLE_IP) {
2112 *array = sample->ip;
2116 if (type & PERF_SAMPLE_TID) {
2117 u.val32[0] = sample->pid;
2118 u.val32[1] = sample->tid;
2121 * Inverse of what is done in perf_evsel__parse_sample
2123 u.val32[0] = bswap_32(u.val32[0]);
2124 u.val32[1] = bswap_32(u.val32[1]);
2125 u.val64 = bswap_64(u.val64);
2132 if (type & PERF_SAMPLE_TIME) {
2133 *array = sample->time;
2137 if (type & PERF_SAMPLE_ADDR) {
2138 *array = sample->addr;
2142 if (type & PERF_SAMPLE_ID) {
2143 *array = sample->id;
2147 if (type & PERF_SAMPLE_STREAM_ID) {
2148 *array = sample->stream_id;
2152 if (type & PERF_SAMPLE_CPU) {
2153 u.val32[0] = sample->cpu;
2156 * Inverse of what is done in perf_evsel__parse_sample
2158 u.val32[0] = bswap_32(u.val32[0]);
2159 u.val64 = bswap_64(u.val64);
2165 if (type & PERF_SAMPLE_PERIOD) {
2166 *array = sample->period;
2170 if (type & PERF_SAMPLE_READ) {
2171 if (read_format & PERF_FORMAT_GROUP)
2172 *array = sample->read.group.nr;
2174 *array = sample->read.one.value;
2177 if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED) {
2178 *array = sample->read.time_enabled;
2182 if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING) {
2183 *array = sample->read.time_running;
2187 /* PERF_FORMAT_ID is forced for PERF_SAMPLE_READ */
2188 if (read_format & PERF_FORMAT_GROUP) {
2189 sz = sample->read.group.nr *
2190 sizeof(struct sample_read_value);
2191 memcpy(array, sample->read.group.values, sz);
2192 array = (void *)array + sz;
2194 *array = sample->read.one.id;
2199 if (type & PERF_SAMPLE_CALLCHAIN) {
2200 sz = (sample->callchain->nr + 1) * sizeof(u64);
2201 memcpy(array, sample->callchain, sz);
2202 array = (void *)array + sz;
2205 if (type & PERF_SAMPLE_RAW) {
2206 u.val32[0] = sample->raw_size;
2207 if (WARN_ONCE(swapped,
2208 "Endianness of raw data not corrected!\n")) {
2210 * Inverse of what is done in perf_evsel__parse_sample
2212 u.val32[0] = bswap_32(u.val32[0]);
2213 u.val32[1] = bswap_32(u.val32[1]);
2214 u.val64 = bswap_64(u.val64);
2217 array = (void *)array + sizeof(u32);
2219 memcpy(array, sample->raw_data, sample->raw_size);
2220 array = (void *)array + sample->raw_size;
2223 if (type & PERF_SAMPLE_BRANCH_STACK) {
2224 sz = sample->branch_stack->nr * sizeof(struct branch_entry);
2226 memcpy(array, sample->branch_stack, sz);
2227 array = (void *)array + sz;
2230 if (type & PERF_SAMPLE_REGS_USER) {
2231 if (sample->user_regs.abi) {
2232 *array++ = sample->user_regs.abi;
2233 sz = hweight_long(sample->user_regs.mask) * sizeof(u64);
2234 memcpy(array, sample->user_regs.regs, sz);
2235 array = (void *)array + sz;
2241 if (type & PERF_SAMPLE_STACK_USER) {
2242 sz = sample->user_stack.size;
2245 memcpy(array, sample->user_stack.data, sz);
2246 array = (void *)array + sz;
2251 if (type & PERF_SAMPLE_WEIGHT) {
2252 *array = sample->weight;
2256 if (type & PERF_SAMPLE_DATA_SRC) {
2257 *array = sample->data_src;
2261 if (type & PERF_SAMPLE_TRANSACTION) {
2262 *array = sample->transaction;
2266 if (type & PERF_SAMPLE_REGS_INTR) {
2267 if (sample->intr_regs.abi) {
2268 *array++ = sample->intr_regs.abi;
2269 sz = hweight_long(sample->intr_regs.mask) * sizeof(u64);
2270 memcpy(array, sample->intr_regs.regs, sz);
2271 array = (void *)array + sz;
2280 struct format_field *perf_evsel__field(struct perf_evsel *evsel, const char *name)
2282 return pevent_find_field(evsel->tp_format, name);
2285 void *perf_evsel__rawptr(struct perf_evsel *evsel, struct perf_sample *sample,
2288 struct format_field *field = perf_evsel__field(evsel, name);
2294 offset = field->offset;
2296 if (field->flags & FIELD_IS_DYNAMIC) {
2297 offset = *(int *)(sample->raw_data + field->offset);
2301 return sample->raw_data + offset;
2304 u64 format_field__intval(struct format_field *field, struct perf_sample *sample,
2308 void *ptr = sample->raw_data + field->offset;
2310 switch (field->size) {
2314 value = *(u16 *)ptr;
2317 value = *(u32 *)ptr;
2320 memcpy(&value, ptr, sizeof(u64));
2329 switch (field->size) {
2331 return bswap_16(value);
2333 return bswap_32(value);
2335 return bswap_64(value);
2343 u64 perf_evsel__intval(struct perf_evsel *evsel, struct perf_sample *sample,
2346 struct format_field *field = perf_evsel__field(evsel, name);
2351 return field ? format_field__intval(field, sample, evsel->needs_swap) : 0;
2354 bool perf_evsel__fallback(struct perf_evsel *evsel, int err,
2355 char *msg, size_t msgsize)
2359 if ((err == ENOENT || err == ENXIO || err == ENODEV) &&
2360 evsel->attr.type == PERF_TYPE_HARDWARE &&
2361 evsel->attr.config == PERF_COUNT_HW_CPU_CYCLES) {
2363 * If it's cycles then fall back to hrtimer based
2364 * cpu-clock-tick sw counter, which is always available even if
2367 * PPC returns ENXIO until 2.6.37 (behavior changed with commit
2370 scnprintf(msg, msgsize, "%s",
2371 "The cycles event is not supported, trying to fall back to cpu-clock-ticks");
2373 evsel->attr.type = PERF_TYPE_SOFTWARE;
2374 evsel->attr.config = PERF_COUNT_SW_CPU_CLOCK;
2376 zfree(&evsel->name);
2378 } else if (err == EACCES && !evsel->attr.exclude_kernel &&
2379 (paranoid = perf_event_paranoid()) > 1) {
2380 const char *name = perf_evsel__name(evsel);
2383 if (asprintf(&new_name, "%s%su", name, strchr(name, ':') ? "" : ":") < 0)
2388 evsel->name = new_name;
2389 scnprintf(msg, msgsize,
2390 "kernel.perf_event_paranoid=%d, trying to fall back to excluding kernel samples", paranoid);
2391 evsel->attr.exclude_kernel = 1;
2399 int perf_evsel__open_strerror(struct perf_evsel *evsel, struct target *target,
2400 int err, char *msg, size_t size)
2402 char sbuf[STRERR_BUFSIZE];
2407 return scnprintf(msg, size,
2408 "You may not have permission to collect %sstats.\n\n"
2409 "Consider tweaking /proc/sys/kernel/perf_event_paranoid,\n"
2410 "which controls use of the performance events system by\n"
2411 "unprivileged users (without CAP_SYS_ADMIN).\n\n"
2412 "The current value is %d:\n\n"
2413 " -1: Allow use of (almost) all events by all users\n"
2414 ">= 0: Disallow raw tracepoint access by users without CAP_IOC_LOCK\n"
2415 ">= 1: Disallow CPU event access by users without CAP_SYS_ADMIN\n"
2416 ">= 2: Disallow kernel profiling by users without CAP_SYS_ADMIN",
2417 target->system_wide ? "system-wide " : "",
2418 perf_event_paranoid());
2420 return scnprintf(msg, size, "The %s event is not supported.",
2421 perf_evsel__name(evsel));
2423 return scnprintf(msg, size, "%s",
2424 "Too many events are opened.\n"
2425 "Probably the maximum number of open file descriptors has been reached.\n"
2426 "Hint: Try again after reducing the number of events.\n"
2427 "Hint: Try increasing the limit with 'ulimit -n <limit>'");
2429 if ((evsel->attr.sample_type & PERF_SAMPLE_CALLCHAIN) != 0 &&
2430 access("/proc/sys/kernel/perf_event_max_stack", F_OK) == 0)
2431 return scnprintf(msg, size,
2432 "Not enough memory to setup event with callchain.\n"
2433 "Hint: Try tweaking /proc/sys/kernel/perf_event_max_stack\n"
2434 "Hint: Current value: %d", sysctl_perf_event_max_stack);
2437 if (target->cpu_list)
2438 return scnprintf(msg, size, "%s",
2439 "No such device - did you specify an out-of-range profile CPU?");
2442 if (evsel->attr.sample_period != 0)
2443 return scnprintf(msg, size, "%s",
2444 "PMU Hardware doesn't support sampling/overflow-interrupts.");
2445 if (evsel->attr.precise_ip)
2446 return scnprintf(msg, size, "%s",
2447 "\'precise\' request may not be supported. Try removing 'p' modifier.");
2448 #if defined(__i386__) || defined(__x86_64__)
2449 if (evsel->attr.type == PERF_TYPE_HARDWARE)
2450 return scnprintf(msg, size, "%s",
2451 "No hardware sampling interrupt available.\n"
2452 "No APIC? If so then you can boot the kernel with the \"lapic\" boot parameter to force-enable it.");
2456 if (find_process("oprofiled"))
2457 return scnprintf(msg, size,
2458 "The PMU counters are busy/taken by another profiler.\n"
2459 "We found oprofile daemon running, please stop it and try again.");
2462 if (evsel->attr.write_backward && perf_missing_features.write_backward)
2463 return scnprintf(msg, size, "Reading from overwrite event is not supported by this kernel.");
2464 if (perf_missing_features.clockid)
2465 return scnprintf(msg, size, "clockid feature not supported.");
2466 if (perf_missing_features.clockid_wrong)
2467 return scnprintf(msg, size, "wrong clockid (%d).", clockid);
2473 return scnprintf(msg, size,
2474 "The sys_perf_event_open() syscall returned with %d (%s) for event (%s).\n"
2475 "/bin/dmesg may provide additional information.\n"
2476 "No CONFIG_PERF_EVENTS=y kernel support configured?",
2477 err, str_error_r(err, sbuf, sizeof(sbuf)),
2478 perf_evsel__name(evsel));
2481 char *perf_evsel__env_arch(struct perf_evsel *evsel)
2483 if (evsel && evsel->evlist && evsel->evlist->env)
2484 return evsel->evlist->env->arch;