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);
246 perf_evsel__init(evsel, attr, idx);
248 if (perf_evsel__is_bpf_output(evsel)) {
249 evsel->attr.sample_type |= (PERF_SAMPLE_RAW | PERF_SAMPLE_TIME |
250 PERF_SAMPLE_CPU | PERF_SAMPLE_PERIOD),
251 evsel->attr.sample_period = 1;
257 struct perf_evsel *perf_evsel__new_cycles(void)
259 struct perf_event_attr attr = {
260 .type = PERF_TYPE_HARDWARE,
261 .config = PERF_COUNT_HW_CPU_CYCLES,
263 struct perf_evsel *evsel;
265 event_attr_init(&attr);
267 * Unnamed union member, not supported as struct member named
268 * initializer in older compilers such as gcc 4.4.7
270 * Just for probing the precise_ip:
272 attr.sample_period = 1;
274 perf_event_attr__set_max_precise_ip(&attr);
276 * Now let the usual logic to set up the perf_event_attr defaults
277 * to kick in when we return and before perf_evsel__open() is called.
279 attr.sample_period = 0;
281 evsel = perf_evsel__new(&attr);
285 /* use asprintf() because free(evsel) assumes name is allocated */
286 if (asprintf(&evsel->name, "cycles%.*s",
287 attr.precise_ip ? attr.precise_ip + 1 : 0, ":ppp") < 0)
292 perf_evsel__delete(evsel);
298 * Returns pointer with encoded error via <linux/err.h> interface.
300 struct perf_evsel *perf_evsel__newtp_idx(const char *sys, const char *name, int idx)
302 struct perf_evsel *evsel = zalloc(perf_evsel__object.size);
308 struct perf_event_attr attr = {
309 .type = PERF_TYPE_TRACEPOINT,
310 .sample_type = (PERF_SAMPLE_RAW | PERF_SAMPLE_TIME |
311 PERF_SAMPLE_CPU | PERF_SAMPLE_PERIOD),
314 if (asprintf(&evsel->name, "%s:%s", sys, name) < 0)
317 evsel->tp_format = trace_event__tp_format(sys, name);
318 if (IS_ERR(evsel->tp_format)) {
319 err = PTR_ERR(evsel->tp_format);
323 event_attr_init(&attr);
324 attr.config = evsel->tp_format->id;
325 attr.sample_period = 1;
326 perf_evsel__init(evsel, &attr, idx);
338 const char *perf_evsel__hw_names[PERF_COUNT_HW_MAX] = {
346 "stalled-cycles-frontend",
347 "stalled-cycles-backend",
351 static const char *__perf_evsel__hw_name(u64 config)
353 if (config < PERF_COUNT_HW_MAX && perf_evsel__hw_names[config])
354 return perf_evsel__hw_names[config];
356 return "unknown-hardware";
359 static int perf_evsel__add_modifiers(struct perf_evsel *evsel, char *bf, size_t size)
361 int colon = 0, r = 0;
362 struct perf_event_attr *attr = &evsel->attr;
363 bool exclude_guest_default = false;
365 #define MOD_PRINT(context, mod) do { \
366 if (!attr->exclude_##context) { \
367 if (!colon) colon = ++r; \
368 r += scnprintf(bf + r, size - r, "%c", mod); \
371 if (attr->exclude_kernel || attr->exclude_user || attr->exclude_hv) {
372 MOD_PRINT(kernel, 'k');
373 MOD_PRINT(user, 'u');
375 exclude_guest_default = true;
378 if (attr->precise_ip) {
381 r += scnprintf(bf + r, size - r, "%.*s", attr->precise_ip, "ppp");
382 exclude_guest_default = true;
385 if (attr->exclude_host || attr->exclude_guest == exclude_guest_default) {
386 MOD_PRINT(host, 'H');
387 MOD_PRINT(guest, 'G');
395 static int perf_evsel__hw_name(struct perf_evsel *evsel, char *bf, size_t size)
397 int r = scnprintf(bf, size, "%s", __perf_evsel__hw_name(evsel->attr.config));
398 return r + perf_evsel__add_modifiers(evsel, bf + r, size - r);
401 const char *perf_evsel__sw_names[PERF_COUNT_SW_MAX] = {
414 static const char *__perf_evsel__sw_name(u64 config)
416 if (config < PERF_COUNT_SW_MAX && perf_evsel__sw_names[config])
417 return perf_evsel__sw_names[config];
418 return "unknown-software";
421 static int perf_evsel__sw_name(struct perf_evsel *evsel, char *bf, size_t size)
423 int r = scnprintf(bf, size, "%s", __perf_evsel__sw_name(evsel->attr.config));
424 return r + perf_evsel__add_modifiers(evsel, bf + r, size - r);
427 static int __perf_evsel__bp_name(char *bf, size_t size, u64 addr, u64 type)
431 r = scnprintf(bf, size, "mem:0x%" PRIx64 ":", addr);
433 if (type & HW_BREAKPOINT_R)
434 r += scnprintf(bf + r, size - r, "r");
436 if (type & HW_BREAKPOINT_W)
437 r += scnprintf(bf + r, size - r, "w");
439 if (type & HW_BREAKPOINT_X)
440 r += scnprintf(bf + r, size - r, "x");
445 static int perf_evsel__bp_name(struct perf_evsel *evsel, char *bf, size_t size)
447 struct perf_event_attr *attr = &evsel->attr;
448 int r = __perf_evsel__bp_name(bf, size, attr->bp_addr, attr->bp_type);
449 return r + perf_evsel__add_modifiers(evsel, bf + r, size - r);
452 const char *perf_evsel__hw_cache[PERF_COUNT_HW_CACHE_MAX]
453 [PERF_EVSEL__MAX_ALIASES] = {
454 { "L1-dcache", "l1-d", "l1d", "L1-data", },
455 { "L1-icache", "l1-i", "l1i", "L1-instruction", },
457 { "dTLB", "d-tlb", "Data-TLB", },
458 { "iTLB", "i-tlb", "Instruction-TLB", },
459 { "branch", "branches", "bpu", "btb", "bpc", },
463 const char *perf_evsel__hw_cache_op[PERF_COUNT_HW_CACHE_OP_MAX]
464 [PERF_EVSEL__MAX_ALIASES] = {
465 { "load", "loads", "read", },
466 { "store", "stores", "write", },
467 { "prefetch", "prefetches", "speculative-read", "speculative-load", },
470 const char *perf_evsel__hw_cache_result[PERF_COUNT_HW_CACHE_RESULT_MAX]
471 [PERF_EVSEL__MAX_ALIASES] = {
472 { "refs", "Reference", "ops", "access", },
473 { "misses", "miss", },
476 #define C(x) PERF_COUNT_HW_CACHE_##x
477 #define CACHE_READ (1 << C(OP_READ))
478 #define CACHE_WRITE (1 << C(OP_WRITE))
479 #define CACHE_PREFETCH (1 << C(OP_PREFETCH))
480 #define COP(x) (1 << x)
483 * cache operartion stat
484 * L1I : Read and prefetch only
485 * ITLB and BPU : Read-only
487 static unsigned long perf_evsel__hw_cache_stat[C(MAX)] = {
488 [C(L1D)] = (CACHE_READ | CACHE_WRITE | CACHE_PREFETCH),
489 [C(L1I)] = (CACHE_READ | CACHE_PREFETCH),
490 [C(LL)] = (CACHE_READ | CACHE_WRITE | CACHE_PREFETCH),
491 [C(DTLB)] = (CACHE_READ | CACHE_WRITE | CACHE_PREFETCH),
492 [C(ITLB)] = (CACHE_READ),
493 [C(BPU)] = (CACHE_READ),
494 [C(NODE)] = (CACHE_READ | CACHE_WRITE | CACHE_PREFETCH),
497 bool perf_evsel__is_cache_op_valid(u8 type, u8 op)
499 if (perf_evsel__hw_cache_stat[type] & COP(op))
500 return true; /* valid */
502 return false; /* invalid */
505 int __perf_evsel__hw_cache_type_op_res_name(u8 type, u8 op, u8 result,
506 char *bf, size_t size)
509 return scnprintf(bf, size, "%s-%s-%s", perf_evsel__hw_cache[type][0],
510 perf_evsel__hw_cache_op[op][0],
511 perf_evsel__hw_cache_result[result][0]);
514 return scnprintf(bf, size, "%s-%s", perf_evsel__hw_cache[type][0],
515 perf_evsel__hw_cache_op[op][1]);
518 static int __perf_evsel__hw_cache_name(u64 config, char *bf, size_t size)
520 u8 op, result, type = (config >> 0) & 0xff;
521 const char *err = "unknown-ext-hardware-cache-type";
523 if (type >= PERF_COUNT_HW_CACHE_MAX)
526 op = (config >> 8) & 0xff;
527 err = "unknown-ext-hardware-cache-op";
528 if (op >= PERF_COUNT_HW_CACHE_OP_MAX)
531 result = (config >> 16) & 0xff;
532 err = "unknown-ext-hardware-cache-result";
533 if (result >= PERF_COUNT_HW_CACHE_RESULT_MAX)
536 err = "invalid-cache";
537 if (!perf_evsel__is_cache_op_valid(type, op))
540 return __perf_evsel__hw_cache_type_op_res_name(type, op, result, bf, size);
542 return scnprintf(bf, size, "%s", err);
545 static int perf_evsel__hw_cache_name(struct perf_evsel *evsel, char *bf, size_t size)
547 int ret = __perf_evsel__hw_cache_name(evsel->attr.config, bf, size);
548 return ret + perf_evsel__add_modifiers(evsel, bf + ret, size - ret);
551 static int perf_evsel__raw_name(struct perf_evsel *evsel, char *bf, size_t size)
553 int ret = scnprintf(bf, size, "raw 0x%" PRIx64, evsel->attr.config);
554 return ret + perf_evsel__add_modifiers(evsel, bf + ret, size - ret);
557 const char *perf_evsel__name(struct perf_evsel *evsel)
567 switch (evsel->attr.type) {
569 perf_evsel__raw_name(evsel, bf, sizeof(bf));
572 case PERF_TYPE_HARDWARE:
573 perf_evsel__hw_name(evsel, bf, sizeof(bf));
576 case PERF_TYPE_HW_CACHE:
577 perf_evsel__hw_cache_name(evsel, bf, sizeof(bf));
580 case PERF_TYPE_SOFTWARE:
581 perf_evsel__sw_name(evsel, bf, sizeof(bf));
584 case PERF_TYPE_TRACEPOINT:
585 scnprintf(bf, sizeof(bf), "%s", "unknown tracepoint");
588 case PERF_TYPE_BREAKPOINT:
589 perf_evsel__bp_name(evsel, bf, sizeof(bf));
593 scnprintf(bf, sizeof(bf), "unknown attr type: %d",
598 evsel->name = strdup(bf);
606 const char *perf_evsel__group_name(struct perf_evsel *evsel)
608 return evsel->group_name ?: "anon group";
611 int perf_evsel__group_desc(struct perf_evsel *evsel, char *buf, size_t size)
614 struct perf_evsel *pos;
615 const char *group_name = perf_evsel__group_name(evsel);
617 ret = scnprintf(buf, size, "%s", group_name);
619 ret += scnprintf(buf + ret, size - ret, " { %s",
620 perf_evsel__name(evsel));
622 for_each_group_member(pos, evsel)
623 ret += scnprintf(buf + ret, size - ret, ", %s",
624 perf_evsel__name(pos));
626 ret += scnprintf(buf + ret, size - ret, " }");
631 void perf_evsel__config_callchain(struct perf_evsel *evsel,
632 struct record_opts *opts,
633 struct callchain_param *param)
635 bool function = perf_evsel__is_function_event(evsel);
636 struct perf_event_attr *attr = &evsel->attr;
638 perf_evsel__set_sample_bit(evsel, CALLCHAIN);
640 attr->sample_max_stack = param->max_stack;
642 if (param->record_mode == CALLCHAIN_LBR) {
643 if (!opts->branch_stack) {
644 if (attr->exclude_user) {
645 pr_warning("LBR callstack option is only available "
646 "to get user callchain information. "
647 "Falling back to framepointers.\n");
649 perf_evsel__set_sample_bit(evsel, BRANCH_STACK);
650 attr->branch_sample_type = PERF_SAMPLE_BRANCH_USER |
651 PERF_SAMPLE_BRANCH_CALL_STACK |
652 PERF_SAMPLE_BRANCH_NO_CYCLES |
653 PERF_SAMPLE_BRANCH_NO_FLAGS;
656 pr_warning("Cannot use LBR callstack with branch stack. "
657 "Falling back to framepointers.\n");
660 if (param->record_mode == CALLCHAIN_DWARF) {
662 perf_evsel__set_sample_bit(evsel, REGS_USER);
663 perf_evsel__set_sample_bit(evsel, STACK_USER);
664 attr->sample_regs_user = PERF_REGS_MASK;
665 attr->sample_stack_user = param->dump_size;
666 attr->exclude_callchain_user = 1;
668 pr_info("Cannot use DWARF unwind for function trace event,"
669 " falling back to framepointers.\n");
674 pr_info("Disabling user space callchains for function trace event.\n");
675 attr->exclude_callchain_user = 1;
680 perf_evsel__reset_callgraph(struct perf_evsel *evsel,
681 struct callchain_param *param)
683 struct perf_event_attr *attr = &evsel->attr;
685 perf_evsel__reset_sample_bit(evsel, CALLCHAIN);
686 if (param->record_mode == CALLCHAIN_LBR) {
687 perf_evsel__reset_sample_bit(evsel, BRANCH_STACK);
688 attr->branch_sample_type &= ~(PERF_SAMPLE_BRANCH_USER |
689 PERF_SAMPLE_BRANCH_CALL_STACK);
691 if (param->record_mode == CALLCHAIN_DWARF) {
692 perf_evsel__reset_sample_bit(evsel, REGS_USER);
693 perf_evsel__reset_sample_bit(evsel, STACK_USER);
697 static void apply_config_terms(struct perf_evsel *evsel,
698 struct record_opts *opts)
700 struct perf_evsel_config_term *term;
701 struct list_head *config_terms = &evsel->config_terms;
702 struct perf_event_attr *attr = &evsel->attr;
703 /* callgraph default */
704 struct callchain_param param = {
705 .record_mode = callchain_param.record_mode,
709 const char *callgraph_buf = NULL;
711 list_for_each_entry(term, config_terms, list) {
712 switch (term->type) {
713 case PERF_EVSEL__CONFIG_TERM_PERIOD:
714 attr->sample_period = term->val.period;
717 case PERF_EVSEL__CONFIG_TERM_FREQ:
718 attr->sample_freq = term->val.freq;
721 case PERF_EVSEL__CONFIG_TERM_TIME:
723 perf_evsel__set_sample_bit(evsel, TIME);
725 perf_evsel__reset_sample_bit(evsel, TIME);
727 case PERF_EVSEL__CONFIG_TERM_CALLGRAPH:
728 callgraph_buf = term->val.callgraph;
730 case PERF_EVSEL__CONFIG_TERM_STACK_USER:
731 dump_size = term->val.stack_user;
733 case PERF_EVSEL__CONFIG_TERM_MAX_STACK:
734 max_stack = term->val.max_stack;
736 case PERF_EVSEL__CONFIG_TERM_INHERIT:
738 * attr->inherit should has already been set by
739 * perf_evsel__config. If user explicitly set
740 * inherit using config terms, override global
741 * opt->no_inherit setting.
743 attr->inherit = term->val.inherit ? 1 : 0;
745 case PERF_EVSEL__CONFIG_TERM_OVERWRITE:
746 attr->write_backward = term->val.overwrite ? 1 : 0;
753 /* User explicitly set per-event callgraph, clear the old setting and reset. */
754 if ((callgraph_buf != NULL) || (dump_size > 0) || max_stack) {
756 param.max_stack = max_stack;
757 if (callgraph_buf == NULL)
758 callgraph_buf = "fp";
761 /* parse callgraph parameters */
762 if (callgraph_buf != NULL) {
763 if (!strcmp(callgraph_buf, "no")) {
764 param.enabled = false;
765 param.record_mode = CALLCHAIN_NONE;
767 param.enabled = true;
768 if (parse_callchain_record(callgraph_buf, ¶m)) {
769 pr_err("per-event callgraph setting for %s failed. "
770 "Apply callgraph global setting for it\n",
777 dump_size = round_up(dump_size, sizeof(u64));
778 param.dump_size = dump_size;
781 /* If global callgraph set, clear it */
782 if (callchain_param.enabled)
783 perf_evsel__reset_callgraph(evsel, &callchain_param);
785 /* set perf-event callgraph */
787 perf_evsel__config_callchain(evsel, opts, ¶m);
792 * The enable_on_exec/disabled value strategy:
794 * 1) For any type of traced program:
795 * - all independent events and group leaders are disabled
796 * - all group members are enabled
798 * Group members are ruled by group leaders. They need to
799 * be enabled, because the group scheduling relies on that.
801 * 2) For traced programs executed by perf:
802 * - all independent events and group leaders have
804 * - we don't specifically enable or disable any event during
807 * Independent events and group leaders are initially disabled
808 * and get enabled by exec. Group members are ruled by group
809 * leaders as stated in 1).
811 * 3) For traced programs attached by perf (pid/tid):
812 * - we specifically enable or disable all events during
815 * When attaching events to already running traced we
816 * enable/disable events specifically, as there's no
817 * initial traced exec call.
819 void perf_evsel__config(struct perf_evsel *evsel, struct record_opts *opts,
820 struct callchain_param *callchain)
822 struct perf_evsel *leader = evsel->leader;
823 struct perf_event_attr *attr = &evsel->attr;
824 int track = evsel->tracking;
825 bool per_cpu = opts->target.default_per_cpu && !opts->target.per_thread;
827 attr->sample_id_all = perf_missing_features.sample_id_all ? 0 : 1;
828 attr->inherit = !opts->no_inherit;
829 attr->write_backward = opts->overwrite ? 1 : 0;
831 perf_evsel__set_sample_bit(evsel, IP);
832 perf_evsel__set_sample_bit(evsel, TID);
834 if (evsel->sample_read) {
835 perf_evsel__set_sample_bit(evsel, READ);
838 * We need ID even in case of single event, because
839 * PERF_SAMPLE_READ process ID specific data.
841 perf_evsel__set_sample_id(evsel, false);
844 * Apply group format only if we belong to group
845 * with more than one members.
847 if (leader->nr_members > 1) {
848 attr->read_format |= PERF_FORMAT_GROUP;
854 * We default some events to have a default interval. But keep
855 * it a weak assumption overridable by the user.
857 if (!attr->sample_period || (opts->user_freq != UINT_MAX ||
858 opts->user_interval != ULLONG_MAX)) {
860 perf_evsel__set_sample_bit(evsel, PERIOD);
862 attr->sample_freq = opts->freq;
864 attr->sample_period = opts->default_interval;
869 * Disable sampling for all group members other
870 * than leader in case leader 'leads' the sampling.
872 if ((leader != evsel) && leader->sample_read) {
873 attr->sample_freq = 0;
874 attr->sample_period = 0;
877 if (opts->no_samples)
878 attr->sample_freq = 0;
880 if (opts->inherit_stat)
881 attr->inherit_stat = 1;
883 if (opts->sample_address) {
884 perf_evsel__set_sample_bit(evsel, ADDR);
885 attr->mmap_data = track;
889 * We don't allow user space callchains for function trace
890 * event, due to issues with page faults while tracing page
891 * fault handler and its overall trickiness nature.
893 if (perf_evsel__is_function_event(evsel))
894 evsel->attr.exclude_callchain_user = 1;
896 if (callchain && callchain->enabled && !evsel->no_aux_samples)
897 perf_evsel__config_callchain(evsel, opts, callchain);
899 if (opts->sample_intr_regs) {
900 attr->sample_regs_intr = opts->sample_intr_regs;
901 perf_evsel__set_sample_bit(evsel, REGS_INTR);
904 if (target__has_cpu(&opts->target) || opts->sample_cpu)
905 perf_evsel__set_sample_bit(evsel, CPU);
908 perf_evsel__set_sample_bit(evsel, PERIOD);
911 * When the user explicitly disabled time don't force it here.
913 if (opts->sample_time &&
914 (!perf_missing_features.sample_id_all &&
915 (!opts->no_inherit || target__has_cpu(&opts->target) || per_cpu ||
916 opts->sample_time_set)))
917 perf_evsel__set_sample_bit(evsel, TIME);
919 if (opts->raw_samples && !evsel->no_aux_samples) {
920 perf_evsel__set_sample_bit(evsel, TIME);
921 perf_evsel__set_sample_bit(evsel, RAW);
922 perf_evsel__set_sample_bit(evsel, CPU);
925 if (opts->sample_address)
926 perf_evsel__set_sample_bit(evsel, DATA_SRC);
928 if (opts->no_buffering) {
930 attr->wakeup_events = 1;
932 if (opts->branch_stack && !evsel->no_aux_samples) {
933 perf_evsel__set_sample_bit(evsel, BRANCH_STACK);
934 attr->branch_sample_type = opts->branch_stack;
937 if (opts->sample_weight)
938 perf_evsel__set_sample_bit(evsel, WEIGHT);
942 attr->mmap2 = track && !perf_missing_features.mmap2;
945 if (opts->record_switch_events)
946 attr->context_switch = track;
948 if (opts->sample_transaction)
949 perf_evsel__set_sample_bit(evsel, TRANSACTION);
951 if (opts->running_time) {
952 evsel->attr.read_format |=
953 PERF_FORMAT_TOTAL_TIME_ENABLED |
954 PERF_FORMAT_TOTAL_TIME_RUNNING;
958 * XXX see the function comment above
960 * Disabling only independent events or group leaders,
961 * keeping group members enabled.
963 if (perf_evsel__is_group_leader(evsel))
967 * Setting enable_on_exec for independent events and
968 * group leaders for traced executed by perf.
970 if (target__none(&opts->target) && perf_evsel__is_group_leader(evsel) &&
971 !opts->initial_delay)
972 attr->enable_on_exec = 1;
974 if (evsel->immediate) {
976 attr->enable_on_exec = 0;
979 clockid = opts->clockid;
980 if (opts->use_clockid) {
981 attr->use_clockid = 1;
982 attr->clockid = opts->clockid;
985 if (evsel->precise_max)
986 perf_event_attr__set_max_precise_ip(attr);
988 if (opts->all_user) {
989 attr->exclude_kernel = 1;
990 attr->exclude_user = 0;
993 if (opts->all_kernel) {
994 attr->exclude_kernel = 0;
995 attr->exclude_user = 1;
999 * Apply event specific term settings,
1000 * it overloads any global configuration.
1002 apply_config_terms(evsel, opts);
1005 static int perf_evsel__alloc_fd(struct perf_evsel *evsel, int ncpus, int nthreads)
1007 if (evsel->system_wide)
1010 evsel->fd = xyarray__new(ncpus, nthreads, sizeof(int));
1014 for (cpu = 0; cpu < ncpus; cpu++) {
1015 for (thread = 0; thread < nthreads; thread++) {
1016 FD(evsel, cpu, thread) = -1;
1021 return evsel->fd != NULL ? 0 : -ENOMEM;
1024 static int perf_evsel__run_ioctl(struct perf_evsel *evsel, int ncpus, int nthreads,
1029 if (evsel->system_wide)
1032 for (cpu = 0; cpu < ncpus; cpu++) {
1033 for (thread = 0; thread < nthreads; thread++) {
1034 int fd = FD(evsel, cpu, thread),
1035 err = ioctl(fd, ioc, arg);
1045 int perf_evsel__apply_filter(struct perf_evsel *evsel, int ncpus, int nthreads,
1048 return perf_evsel__run_ioctl(evsel, ncpus, nthreads,
1049 PERF_EVENT_IOC_SET_FILTER,
1053 int perf_evsel__set_filter(struct perf_evsel *evsel, const char *filter)
1055 char *new_filter = strdup(filter);
1057 if (new_filter != NULL) {
1058 free(evsel->filter);
1059 evsel->filter = new_filter;
1066 static int perf_evsel__append_filter(struct perf_evsel *evsel,
1067 const char *fmt, const char *filter)
1071 if (evsel->filter == NULL)
1072 return perf_evsel__set_filter(evsel, filter);
1074 if (asprintf(&new_filter, fmt, evsel->filter, filter) > 0) {
1075 free(evsel->filter);
1076 evsel->filter = new_filter;
1083 int perf_evsel__append_tp_filter(struct perf_evsel *evsel, const char *filter)
1085 return perf_evsel__append_filter(evsel, "(%s) && (%s)", filter);
1088 int perf_evsel__append_addr_filter(struct perf_evsel *evsel, const char *filter)
1090 return perf_evsel__append_filter(evsel, "%s,%s", filter);
1093 int perf_evsel__enable(struct perf_evsel *evsel)
1095 int nthreads = thread_map__nr(evsel->threads);
1096 int ncpus = cpu_map__nr(evsel->cpus);
1098 return perf_evsel__run_ioctl(evsel, ncpus, nthreads,
1099 PERF_EVENT_IOC_ENABLE,
1103 int perf_evsel__disable(struct perf_evsel *evsel)
1105 int nthreads = thread_map__nr(evsel->threads);
1106 int ncpus = cpu_map__nr(evsel->cpus);
1108 return perf_evsel__run_ioctl(evsel, ncpus, nthreads,
1109 PERF_EVENT_IOC_DISABLE,
1113 int perf_evsel__alloc_id(struct perf_evsel *evsel, int ncpus, int nthreads)
1115 if (ncpus == 0 || nthreads == 0)
1118 if (evsel->system_wide)
1121 evsel->sample_id = xyarray__new(ncpus, nthreads, sizeof(struct perf_sample_id));
1122 if (evsel->sample_id == NULL)
1125 evsel->id = zalloc(ncpus * nthreads * sizeof(u64));
1126 if (evsel->id == NULL) {
1127 xyarray__delete(evsel->sample_id);
1128 evsel->sample_id = NULL;
1135 static void perf_evsel__free_fd(struct perf_evsel *evsel)
1137 xyarray__delete(evsel->fd);
1141 static void perf_evsel__free_id(struct perf_evsel *evsel)
1143 xyarray__delete(evsel->sample_id);
1144 evsel->sample_id = NULL;
1148 static void perf_evsel__free_config_terms(struct perf_evsel *evsel)
1150 struct perf_evsel_config_term *term, *h;
1152 list_for_each_entry_safe(term, h, &evsel->config_terms, list) {
1153 list_del(&term->list);
1158 void perf_evsel__close_fd(struct perf_evsel *evsel, int ncpus, int nthreads)
1162 if (evsel->system_wide)
1165 for (cpu = 0; cpu < ncpus; cpu++)
1166 for (thread = 0; thread < nthreads; ++thread) {
1167 close(FD(evsel, cpu, thread));
1168 FD(evsel, cpu, thread) = -1;
1172 void perf_evsel__exit(struct perf_evsel *evsel)
1174 assert(list_empty(&evsel->node));
1175 assert(evsel->evlist == NULL);
1176 perf_evsel__free_counts(evsel);
1177 perf_evsel__free_fd(evsel);
1178 perf_evsel__free_id(evsel);
1179 perf_evsel__free_config_terms(evsel);
1180 close_cgroup(evsel->cgrp);
1181 cpu_map__put(evsel->cpus);
1182 cpu_map__put(evsel->own_cpus);
1183 thread_map__put(evsel->threads);
1184 zfree(&evsel->group_name);
1185 zfree(&evsel->name);
1186 perf_evsel__object.fini(evsel);
1189 void perf_evsel__delete(struct perf_evsel *evsel)
1191 perf_evsel__exit(evsel);
1195 void perf_evsel__compute_deltas(struct perf_evsel *evsel, int cpu, int thread,
1196 struct perf_counts_values *count)
1198 struct perf_counts_values tmp;
1200 if (!evsel->prev_raw_counts)
1204 tmp = evsel->prev_raw_counts->aggr;
1205 evsel->prev_raw_counts->aggr = *count;
1207 tmp = *perf_counts(evsel->prev_raw_counts, cpu, thread);
1208 *perf_counts(evsel->prev_raw_counts, cpu, thread) = *count;
1211 count->val = count->val - tmp.val;
1212 count->ena = count->ena - tmp.ena;
1213 count->run = count->run - tmp.run;
1216 void perf_counts_values__scale(struct perf_counts_values *count,
1217 bool scale, s8 *pscaled)
1222 if (count->run == 0) {
1225 } else if (count->run < count->ena) {
1227 count->val = (u64)((double) count->val * count->ena / count->run + 0.5);
1230 count->ena = count->run = 0;
1236 int perf_evsel__read(struct perf_evsel *evsel, int cpu, int thread,
1237 struct perf_counts_values *count)
1239 memset(count, 0, sizeof(*count));
1241 if (FD(evsel, cpu, thread) < 0)
1244 if (readn(FD(evsel, cpu, thread), count, sizeof(*count)) <= 0)
1250 int __perf_evsel__read_on_cpu(struct perf_evsel *evsel,
1251 int cpu, int thread, bool scale)
1253 struct perf_counts_values count;
1254 size_t nv = scale ? 3 : 1;
1256 if (FD(evsel, cpu, thread) < 0)
1259 if (evsel->counts == NULL && perf_evsel__alloc_counts(evsel, cpu + 1, thread + 1) < 0)
1262 if (readn(FD(evsel, cpu, thread), &count, nv * sizeof(u64)) <= 0)
1265 perf_evsel__compute_deltas(evsel, cpu, thread, &count);
1266 perf_counts_values__scale(&count, scale, NULL);
1267 *perf_counts(evsel->counts, cpu, thread) = count;
1271 static int get_group_fd(struct perf_evsel *evsel, int cpu, int thread)
1273 struct perf_evsel *leader = evsel->leader;
1276 if (perf_evsel__is_group_leader(evsel))
1280 * Leader must be already processed/open,
1281 * if not it's a bug.
1283 BUG_ON(!leader->fd);
1285 fd = FD(leader, cpu, thread);
1296 static void __p_bits(char *buf, size_t size, u64 value, struct bit_names *bits)
1298 bool first_bit = true;
1302 if (value & bits[i].bit) {
1303 buf += scnprintf(buf, size, "%s%s", first_bit ? "" : "|", bits[i].name);
1306 } while (bits[++i].name != NULL);
1309 static void __p_sample_type(char *buf, size_t size, u64 value)
1311 #define bit_name(n) { PERF_SAMPLE_##n, #n }
1312 struct bit_names bits[] = {
1313 bit_name(IP), bit_name(TID), bit_name(TIME), bit_name(ADDR),
1314 bit_name(READ), bit_name(CALLCHAIN), bit_name(ID), bit_name(CPU),
1315 bit_name(PERIOD), bit_name(STREAM_ID), bit_name(RAW),
1316 bit_name(BRANCH_STACK), bit_name(REGS_USER), bit_name(STACK_USER),
1317 bit_name(IDENTIFIER), bit_name(REGS_INTR), bit_name(DATA_SRC),
1322 __p_bits(buf, size, value, bits);
1325 static void __p_branch_sample_type(char *buf, size_t size, u64 value)
1327 #define bit_name(n) { PERF_SAMPLE_BRANCH_##n, #n }
1328 struct bit_names bits[] = {
1329 bit_name(USER), bit_name(KERNEL), bit_name(HV), bit_name(ANY),
1330 bit_name(ANY_CALL), bit_name(ANY_RETURN), bit_name(IND_CALL),
1331 bit_name(ABORT_TX), bit_name(IN_TX), bit_name(NO_TX),
1332 bit_name(COND), bit_name(CALL_STACK), bit_name(IND_JUMP),
1333 bit_name(CALL), bit_name(NO_FLAGS), bit_name(NO_CYCLES),
1337 __p_bits(buf, size, value, bits);
1340 static void __p_read_format(char *buf, size_t size, u64 value)
1342 #define bit_name(n) { PERF_FORMAT_##n, #n }
1343 struct bit_names bits[] = {
1344 bit_name(TOTAL_TIME_ENABLED), bit_name(TOTAL_TIME_RUNNING),
1345 bit_name(ID), bit_name(GROUP),
1349 __p_bits(buf, size, value, bits);
1352 #define BUF_SIZE 1024
1354 #define p_hex(val) snprintf(buf, BUF_SIZE, "%#"PRIx64, (uint64_t)(val))
1355 #define p_unsigned(val) snprintf(buf, BUF_SIZE, "%"PRIu64, (uint64_t)(val))
1356 #define p_signed(val) snprintf(buf, BUF_SIZE, "%"PRId64, (int64_t)(val))
1357 #define p_sample_type(val) __p_sample_type(buf, BUF_SIZE, val)
1358 #define p_branch_sample_type(val) __p_branch_sample_type(buf, BUF_SIZE, val)
1359 #define p_read_format(val) __p_read_format(buf, BUF_SIZE, val)
1361 #define PRINT_ATTRn(_n, _f, _p) \
1365 ret += attr__fprintf(fp, _n, buf, priv);\
1369 #define PRINT_ATTRf(_f, _p) PRINT_ATTRn(#_f, _f, _p)
1371 int perf_event_attr__fprintf(FILE *fp, struct perf_event_attr *attr,
1372 attr__fprintf_f attr__fprintf, void *priv)
1377 PRINT_ATTRf(type, p_unsigned);
1378 PRINT_ATTRf(size, p_unsigned);
1379 PRINT_ATTRf(config, p_hex);
1380 PRINT_ATTRn("{ sample_period, sample_freq }", sample_period, p_unsigned);
1381 PRINT_ATTRf(sample_type, p_sample_type);
1382 PRINT_ATTRf(read_format, p_read_format);
1384 PRINT_ATTRf(disabled, p_unsigned);
1385 PRINT_ATTRf(inherit, p_unsigned);
1386 PRINT_ATTRf(pinned, p_unsigned);
1387 PRINT_ATTRf(exclusive, p_unsigned);
1388 PRINT_ATTRf(exclude_user, p_unsigned);
1389 PRINT_ATTRf(exclude_kernel, p_unsigned);
1390 PRINT_ATTRf(exclude_hv, p_unsigned);
1391 PRINT_ATTRf(exclude_idle, p_unsigned);
1392 PRINT_ATTRf(mmap, p_unsigned);
1393 PRINT_ATTRf(comm, p_unsigned);
1394 PRINT_ATTRf(freq, p_unsigned);
1395 PRINT_ATTRf(inherit_stat, p_unsigned);
1396 PRINT_ATTRf(enable_on_exec, p_unsigned);
1397 PRINT_ATTRf(task, p_unsigned);
1398 PRINT_ATTRf(watermark, p_unsigned);
1399 PRINT_ATTRf(precise_ip, p_unsigned);
1400 PRINT_ATTRf(mmap_data, p_unsigned);
1401 PRINT_ATTRf(sample_id_all, p_unsigned);
1402 PRINT_ATTRf(exclude_host, p_unsigned);
1403 PRINT_ATTRf(exclude_guest, p_unsigned);
1404 PRINT_ATTRf(exclude_callchain_kernel, p_unsigned);
1405 PRINT_ATTRf(exclude_callchain_user, p_unsigned);
1406 PRINT_ATTRf(mmap2, p_unsigned);
1407 PRINT_ATTRf(comm_exec, p_unsigned);
1408 PRINT_ATTRf(use_clockid, p_unsigned);
1409 PRINT_ATTRf(context_switch, p_unsigned);
1410 PRINT_ATTRf(write_backward, p_unsigned);
1412 PRINT_ATTRn("{ wakeup_events, wakeup_watermark }", wakeup_events, p_unsigned);
1413 PRINT_ATTRf(bp_type, p_unsigned);
1414 PRINT_ATTRn("{ bp_addr, config1 }", bp_addr, p_hex);
1415 PRINT_ATTRn("{ bp_len, config2 }", bp_len, p_hex);
1416 PRINT_ATTRf(branch_sample_type, p_branch_sample_type);
1417 PRINT_ATTRf(sample_regs_user, p_hex);
1418 PRINT_ATTRf(sample_stack_user, p_unsigned);
1419 PRINT_ATTRf(clockid, p_signed);
1420 PRINT_ATTRf(sample_regs_intr, p_hex);
1421 PRINT_ATTRf(aux_watermark, p_unsigned);
1422 PRINT_ATTRf(sample_max_stack, p_unsigned);
1427 static int __open_attr__fprintf(FILE *fp, const char *name, const char *val,
1428 void *priv __attribute__((unused)))
1430 return fprintf(fp, " %-32s %s\n", name, val);
1433 static int __perf_evsel__open(struct perf_evsel *evsel, struct cpu_map *cpus,
1434 struct thread_map *threads)
1436 int cpu, thread, nthreads;
1437 unsigned long flags = PERF_FLAG_FD_CLOEXEC;
1439 enum { NO_CHANGE, SET_TO_MAX, INCREASED_MAX } set_rlimit = NO_CHANGE;
1441 if (perf_missing_features.write_backward && evsel->attr.write_backward)
1444 if (evsel->system_wide)
1447 nthreads = threads->nr;
1449 if (evsel->fd == NULL &&
1450 perf_evsel__alloc_fd(evsel, cpus->nr, nthreads) < 0)
1454 flags |= PERF_FLAG_PID_CGROUP;
1455 pid = evsel->cgrp->fd;
1458 fallback_missing_features:
1459 if (perf_missing_features.clockid_wrong)
1460 evsel->attr.clockid = CLOCK_MONOTONIC; /* should always work */
1461 if (perf_missing_features.clockid) {
1462 evsel->attr.use_clockid = 0;
1463 evsel->attr.clockid = 0;
1465 if (perf_missing_features.cloexec)
1466 flags &= ~(unsigned long)PERF_FLAG_FD_CLOEXEC;
1467 if (perf_missing_features.mmap2)
1468 evsel->attr.mmap2 = 0;
1469 if (perf_missing_features.exclude_guest)
1470 evsel->attr.exclude_guest = evsel->attr.exclude_host = 0;
1471 if (perf_missing_features.lbr_flags)
1472 evsel->attr.branch_sample_type &= ~(PERF_SAMPLE_BRANCH_NO_FLAGS |
1473 PERF_SAMPLE_BRANCH_NO_CYCLES);
1475 if (perf_missing_features.sample_id_all)
1476 evsel->attr.sample_id_all = 0;
1479 fprintf(stderr, "%.60s\n", graph_dotted_line);
1480 fprintf(stderr, "perf_event_attr:\n");
1481 perf_event_attr__fprintf(stderr, &evsel->attr, __open_attr__fprintf, NULL);
1482 fprintf(stderr, "%.60s\n", graph_dotted_line);
1485 for (cpu = 0; cpu < cpus->nr; cpu++) {
1487 for (thread = 0; thread < nthreads; thread++) {
1490 if (!evsel->cgrp && !evsel->system_wide)
1491 pid = thread_map__pid(threads, thread);
1493 group_fd = get_group_fd(evsel, cpu, thread);
1495 pr_debug2("sys_perf_event_open: pid %d cpu %d group_fd %d flags %#lx\n",
1496 pid, cpus->map[cpu], group_fd, flags);
1498 FD(evsel, cpu, thread) = sys_perf_event_open(&evsel->attr,
1502 if (FD(evsel, cpu, thread) < 0) {
1504 pr_debug2("sys_perf_event_open failed, error %d\n",
1509 if (evsel->bpf_fd >= 0) {
1510 int evt_fd = FD(evsel, cpu, thread);
1511 int bpf_fd = evsel->bpf_fd;
1514 PERF_EVENT_IOC_SET_BPF,
1516 if (err && errno != EEXIST) {
1517 pr_err("failed to attach bpf fd %d: %s\n",
1518 bpf_fd, strerror(errno));
1524 set_rlimit = NO_CHANGE;
1527 * If we succeeded but had to kill clockid, fail and
1528 * have perf_evsel__open_strerror() print us a nice
1531 if (perf_missing_features.clockid ||
1532 perf_missing_features.clockid_wrong) {
1543 * perf stat needs between 5 and 22 fds per CPU. When we run out
1544 * of them try to increase the limits.
1546 if (err == -EMFILE && set_rlimit < INCREASED_MAX) {
1548 int old_errno = errno;
1550 if (getrlimit(RLIMIT_NOFILE, &l) == 0) {
1551 if (set_rlimit == NO_CHANGE)
1552 l.rlim_cur = l.rlim_max;
1554 l.rlim_cur = l.rlim_max + 1000;
1555 l.rlim_max = l.rlim_cur;
1557 if (setrlimit(RLIMIT_NOFILE, &l) == 0) {
1566 if (err != -EINVAL || cpu > 0 || thread > 0)
1570 * Must probe features in the order they were added to the
1571 * perf_event_attr interface.
1573 if (!perf_missing_features.write_backward && evsel->attr.write_backward) {
1574 perf_missing_features.write_backward = true;
1576 } else if (!perf_missing_features.clockid_wrong && evsel->attr.use_clockid) {
1577 perf_missing_features.clockid_wrong = true;
1578 goto fallback_missing_features;
1579 } else if (!perf_missing_features.clockid && evsel->attr.use_clockid) {
1580 perf_missing_features.clockid = true;
1581 goto fallback_missing_features;
1582 } else if (!perf_missing_features.cloexec && (flags & PERF_FLAG_FD_CLOEXEC)) {
1583 perf_missing_features.cloexec = true;
1584 goto fallback_missing_features;
1585 } else if (!perf_missing_features.mmap2 && evsel->attr.mmap2) {
1586 perf_missing_features.mmap2 = true;
1587 goto fallback_missing_features;
1588 } else if (!perf_missing_features.exclude_guest &&
1589 (evsel->attr.exclude_guest || evsel->attr.exclude_host)) {
1590 perf_missing_features.exclude_guest = true;
1591 goto fallback_missing_features;
1592 } else if (!perf_missing_features.sample_id_all) {
1593 perf_missing_features.sample_id_all = true;
1594 goto retry_sample_id;
1595 } else if (!perf_missing_features.lbr_flags &&
1596 (evsel->attr.branch_sample_type &
1597 (PERF_SAMPLE_BRANCH_NO_CYCLES |
1598 PERF_SAMPLE_BRANCH_NO_FLAGS))) {
1599 perf_missing_features.lbr_flags = true;
1600 goto fallback_missing_features;
1604 while (--thread >= 0) {
1605 close(FD(evsel, cpu, thread));
1606 FD(evsel, cpu, thread) = -1;
1609 } while (--cpu >= 0);
1613 void perf_evsel__close(struct perf_evsel *evsel, int ncpus, int nthreads)
1615 if (evsel->fd == NULL)
1618 perf_evsel__close_fd(evsel, ncpus, nthreads);
1619 perf_evsel__free_fd(evsel);
1631 struct thread_map map;
1633 } empty_thread_map = {
1638 int perf_evsel__open(struct perf_evsel *evsel, struct cpu_map *cpus,
1639 struct thread_map *threads)
1642 /* Work around old compiler warnings about strict aliasing */
1643 cpus = &empty_cpu_map.map;
1646 if (threads == NULL)
1647 threads = &empty_thread_map.map;
1649 return __perf_evsel__open(evsel, cpus, threads);
1652 int perf_evsel__open_per_cpu(struct perf_evsel *evsel,
1653 struct cpu_map *cpus)
1655 return __perf_evsel__open(evsel, cpus, &empty_thread_map.map);
1658 int perf_evsel__open_per_thread(struct perf_evsel *evsel,
1659 struct thread_map *threads)
1661 return __perf_evsel__open(evsel, &empty_cpu_map.map, threads);
1664 static int perf_evsel__parse_id_sample(const struct perf_evsel *evsel,
1665 const union perf_event *event,
1666 struct perf_sample *sample)
1668 u64 type = evsel->attr.sample_type;
1669 const u64 *array = event->sample.array;
1670 bool swapped = evsel->needs_swap;
1673 array += ((event->header.size -
1674 sizeof(event->header)) / sizeof(u64)) - 1;
1676 if (type & PERF_SAMPLE_IDENTIFIER) {
1677 sample->id = *array;
1681 if (type & PERF_SAMPLE_CPU) {
1684 /* undo swap of u64, then swap on individual u32s */
1685 u.val64 = bswap_64(u.val64);
1686 u.val32[0] = bswap_32(u.val32[0]);
1689 sample->cpu = u.val32[0];
1693 if (type & PERF_SAMPLE_STREAM_ID) {
1694 sample->stream_id = *array;
1698 if (type & PERF_SAMPLE_ID) {
1699 sample->id = *array;
1703 if (type & PERF_SAMPLE_TIME) {
1704 sample->time = *array;
1708 if (type & PERF_SAMPLE_TID) {
1711 /* undo swap of u64, then swap on individual u32s */
1712 u.val64 = bswap_64(u.val64);
1713 u.val32[0] = bswap_32(u.val32[0]);
1714 u.val32[1] = bswap_32(u.val32[1]);
1717 sample->pid = u.val32[0];
1718 sample->tid = u.val32[1];
1725 static inline bool overflow(const void *endp, u16 max_size, const void *offset,
1728 return size > max_size || offset + size > endp;
1731 #define OVERFLOW_CHECK(offset, size, max_size) \
1733 if (overflow(endp, (max_size), (offset), (size))) \
1737 #define OVERFLOW_CHECK_u64(offset) \
1738 OVERFLOW_CHECK(offset, sizeof(u64), sizeof(u64))
1740 int perf_evsel__parse_sample(struct perf_evsel *evsel, union perf_event *event,
1741 struct perf_sample *data)
1743 u64 type = evsel->attr.sample_type;
1744 bool swapped = evsel->needs_swap;
1746 u16 max_size = event->header.size;
1747 const void *endp = (void *)event + max_size;
1751 * used for cross-endian analysis. See git commit 65014ab3
1752 * for why this goofiness is needed.
1756 memset(data, 0, sizeof(*data));
1757 data->cpu = data->pid = data->tid = -1;
1758 data->stream_id = data->id = data->time = -1ULL;
1759 data->period = evsel->attr.sample_period;
1760 data->cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK;
1762 if (event->header.type != PERF_RECORD_SAMPLE) {
1763 if (!evsel->attr.sample_id_all)
1765 return perf_evsel__parse_id_sample(evsel, event, data);
1768 array = event->sample.array;
1771 * The evsel's sample_size is based on PERF_SAMPLE_MASK which includes
1772 * up to PERF_SAMPLE_PERIOD. After that overflow() must be used to
1773 * check the format does not go past the end of the event.
1775 if (evsel->sample_size + sizeof(event->header) > event->header.size)
1779 if (type & PERF_SAMPLE_IDENTIFIER) {
1784 if (type & PERF_SAMPLE_IP) {
1789 if (type & PERF_SAMPLE_TID) {
1792 /* undo swap of u64, then swap on individual u32s */
1793 u.val64 = bswap_64(u.val64);
1794 u.val32[0] = bswap_32(u.val32[0]);
1795 u.val32[1] = bswap_32(u.val32[1]);
1798 data->pid = u.val32[0];
1799 data->tid = u.val32[1];
1803 if (type & PERF_SAMPLE_TIME) {
1804 data->time = *array;
1809 if (type & PERF_SAMPLE_ADDR) {
1810 data->addr = *array;
1814 if (type & PERF_SAMPLE_ID) {
1819 if (type & PERF_SAMPLE_STREAM_ID) {
1820 data->stream_id = *array;
1824 if (type & PERF_SAMPLE_CPU) {
1828 /* undo swap of u64, then swap on individual u32s */
1829 u.val64 = bswap_64(u.val64);
1830 u.val32[0] = bswap_32(u.val32[0]);
1833 data->cpu = u.val32[0];
1837 if (type & PERF_SAMPLE_PERIOD) {
1838 data->period = *array;
1842 if (type & PERF_SAMPLE_READ) {
1843 u64 read_format = evsel->attr.read_format;
1845 OVERFLOW_CHECK_u64(array);
1846 if (read_format & PERF_FORMAT_GROUP)
1847 data->read.group.nr = *array;
1849 data->read.one.value = *array;
1853 if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED) {
1854 OVERFLOW_CHECK_u64(array);
1855 data->read.time_enabled = *array;
1859 if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING) {
1860 OVERFLOW_CHECK_u64(array);
1861 data->read.time_running = *array;
1865 /* PERF_FORMAT_ID is forced for PERF_SAMPLE_READ */
1866 if (read_format & PERF_FORMAT_GROUP) {
1867 const u64 max_group_nr = UINT64_MAX /
1868 sizeof(struct sample_read_value);
1870 if (data->read.group.nr > max_group_nr)
1872 sz = data->read.group.nr *
1873 sizeof(struct sample_read_value);
1874 OVERFLOW_CHECK(array, sz, max_size);
1875 data->read.group.values =
1876 (struct sample_read_value *)array;
1877 array = (void *)array + sz;
1879 OVERFLOW_CHECK_u64(array);
1880 data->read.one.id = *array;
1885 if (type & PERF_SAMPLE_CALLCHAIN) {
1886 const u64 max_callchain_nr = UINT64_MAX / sizeof(u64);
1888 OVERFLOW_CHECK_u64(array);
1889 data->callchain = (struct ip_callchain *)array++;
1890 if (data->callchain->nr > max_callchain_nr)
1892 sz = data->callchain->nr * sizeof(u64);
1893 OVERFLOW_CHECK(array, sz, max_size);
1894 array = (void *)array + sz;
1897 if (type & PERF_SAMPLE_RAW) {
1898 OVERFLOW_CHECK_u64(array);
1900 if (WARN_ONCE(swapped,
1901 "Endianness of raw data not corrected!\n")) {
1902 /* undo swap of u64, then swap on individual u32s */
1903 u.val64 = bswap_64(u.val64);
1904 u.val32[0] = bswap_32(u.val32[0]);
1905 u.val32[1] = bswap_32(u.val32[1]);
1907 data->raw_size = u.val32[0];
1908 array = (void *)array + sizeof(u32);
1910 OVERFLOW_CHECK(array, data->raw_size, max_size);
1911 data->raw_data = (void *)array;
1912 array = (void *)array + data->raw_size;
1915 if (type & PERF_SAMPLE_BRANCH_STACK) {
1916 const u64 max_branch_nr = UINT64_MAX /
1917 sizeof(struct branch_entry);
1919 OVERFLOW_CHECK_u64(array);
1920 data->branch_stack = (struct branch_stack *)array++;
1922 if (data->branch_stack->nr > max_branch_nr)
1924 sz = data->branch_stack->nr * sizeof(struct branch_entry);
1925 OVERFLOW_CHECK(array, sz, max_size);
1926 array = (void *)array + sz;
1929 if (type & PERF_SAMPLE_REGS_USER) {
1930 OVERFLOW_CHECK_u64(array);
1931 data->user_regs.abi = *array;
1934 if (data->user_regs.abi) {
1935 u64 mask = evsel->attr.sample_regs_user;
1937 sz = hweight_long(mask) * sizeof(u64);
1938 OVERFLOW_CHECK(array, sz, max_size);
1939 data->user_regs.mask = mask;
1940 data->user_regs.regs = (u64 *)array;
1941 array = (void *)array + sz;
1945 if (type & PERF_SAMPLE_STACK_USER) {
1946 OVERFLOW_CHECK_u64(array);
1949 data->user_stack.offset = ((char *)(array - 1)
1953 data->user_stack.size = 0;
1955 OVERFLOW_CHECK(array, sz, max_size);
1956 data->user_stack.data = (char *)array;
1957 array = (void *)array + sz;
1958 OVERFLOW_CHECK_u64(array);
1959 data->user_stack.size = *array++;
1960 if (WARN_ONCE(data->user_stack.size > sz,
1961 "user stack dump failure\n"))
1966 if (type & PERF_SAMPLE_WEIGHT) {
1967 OVERFLOW_CHECK_u64(array);
1968 data->weight = *array;
1972 data->data_src = PERF_MEM_DATA_SRC_NONE;
1973 if (type & PERF_SAMPLE_DATA_SRC) {
1974 OVERFLOW_CHECK_u64(array);
1975 data->data_src = *array;
1979 data->transaction = 0;
1980 if (type & PERF_SAMPLE_TRANSACTION) {
1981 OVERFLOW_CHECK_u64(array);
1982 data->transaction = *array;
1986 data->intr_regs.abi = PERF_SAMPLE_REGS_ABI_NONE;
1987 if (type & PERF_SAMPLE_REGS_INTR) {
1988 OVERFLOW_CHECK_u64(array);
1989 data->intr_regs.abi = *array;
1992 if (data->intr_regs.abi != PERF_SAMPLE_REGS_ABI_NONE) {
1993 u64 mask = evsel->attr.sample_regs_intr;
1995 sz = hweight_long(mask) * sizeof(u64);
1996 OVERFLOW_CHECK(array, sz, max_size);
1997 data->intr_regs.mask = mask;
1998 data->intr_regs.regs = (u64 *)array;
1999 array = (void *)array + sz;
2006 size_t perf_event__sample_event_size(const struct perf_sample *sample, u64 type,
2009 size_t sz, result = sizeof(struct sample_event);
2011 if (type & PERF_SAMPLE_IDENTIFIER)
2012 result += sizeof(u64);
2014 if (type & PERF_SAMPLE_IP)
2015 result += sizeof(u64);
2017 if (type & PERF_SAMPLE_TID)
2018 result += sizeof(u64);
2020 if (type & PERF_SAMPLE_TIME)
2021 result += sizeof(u64);
2023 if (type & PERF_SAMPLE_ADDR)
2024 result += sizeof(u64);
2026 if (type & PERF_SAMPLE_ID)
2027 result += sizeof(u64);
2029 if (type & PERF_SAMPLE_STREAM_ID)
2030 result += sizeof(u64);
2032 if (type & PERF_SAMPLE_CPU)
2033 result += sizeof(u64);
2035 if (type & PERF_SAMPLE_PERIOD)
2036 result += sizeof(u64);
2038 if (type & PERF_SAMPLE_READ) {
2039 result += sizeof(u64);
2040 if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED)
2041 result += sizeof(u64);
2042 if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING)
2043 result += sizeof(u64);
2044 /* PERF_FORMAT_ID is forced for PERF_SAMPLE_READ */
2045 if (read_format & PERF_FORMAT_GROUP) {
2046 sz = sample->read.group.nr *
2047 sizeof(struct sample_read_value);
2050 result += sizeof(u64);
2054 if (type & PERF_SAMPLE_CALLCHAIN) {
2055 sz = (sample->callchain->nr + 1) * sizeof(u64);
2059 if (type & PERF_SAMPLE_RAW) {
2060 result += sizeof(u32);
2061 result += sample->raw_size;
2064 if (type & PERF_SAMPLE_BRANCH_STACK) {
2065 sz = sample->branch_stack->nr * sizeof(struct branch_entry);
2070 if (type & PERF_SAMPLE_REGS_USER) {
2071 if (sample->user_regs.abi) {
2072 result += sizeof(u64);
2073 sz = hweight_long(sample->user_regs.mask) * sizeof(u64);
2076 result += sizeof(u64);
2080 if (type & PERF_SAMPLE_STACK_USER) {
2081 sz = sample->user_stack.size;
2082 result += sizeof(u64);
2085 result += sizeof(u64);
2089 if (type & PERF_SAMPLE_WEIGHT)
2090 result += sizeof(u64);
2092 if (type & PERF_SAMPLE_DATA_SRC)
2093 result += sizeof(u64);
2095 if (type & PERF_SAMPLE_TRANSACTION)
2096 result += sizeof(u64);
2098 if (type & PERF_SAMPLE_REGS_INTR) {
2099 if (sample->intr_regs.abi) {
2100 result += sizeof(u64);
2101 sz = hweight_long(sample->intr_regs.mask) * sizeof(u64);
2104 result += sizeof(u64);
2111 int perf_event__synthesize_sample(union perf_event *event, u64 type,
2113 const struct perf_sample *sample,
2119 * used for cross-endian analysis. See git commit 65014ab3
2120 * for why this goofiness is needed.
2124 array = event->sample.array;
2126 if (type & PERF_SAMPLE_IDENTIFIER) {
2127 *array = sample->id;
2131 if (type & PERF_SAMPLE_IP) {
2132 *array = sample->ip;
2136 if (type & PERF_SAMPLE_TID) {
2137 u.val32[0] = sample->pid;
2138 u.val32[1] = sample->tid;
2141 * Inverse of what is done in perf_evsel__parse_sample
2143 u.val32[0] = bswap_32(u.val32[0]);
2144 u.val32[1] = bswap_32(u.val32[1]);
2145 u.val64 = bswap_64(u.val64);
2152 if (type & PERF_SAMPLE_TIME) {
2153 *array = sample->time;
2157 if (type & PERF_SAMPLE_ADDR) {
2158 *array = sample->addr;
2162 if (type & PERF_SAMPLE_ID) {
2163 *array = sample->id;
2167 if (type & PERF_SAMPLE_STREAM_ID) {
2168 *array = sample->stream_id;
2172 if (type & PERF_SAMPLE_CPU) {
2173 u.val32[0] = sample->cpu;
2176 * Inverse of what is done in perf_evsel__parse_sample
2178 u.val32[0] = bswap_32(u.val32[0]);
2179 u.val64 = bswap_64(u.val64);
2185 if (type & PERF_SAMPLE_PERIOD) {
2186 *array = sample->period;
2190 if (type & PERF_SAMPLE_READ) {
2191 if (read_format & PERF_FORMAT_GROUP)
2192 *array = sample->read.group.nr;
2194 *array = sample->read.one.value;
2197 if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED) {
2198 *array = sample->read.time_enabled;
2202 if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING) {
2203 *array = sample->read.time_running;
2207 /* PERF_FORMAT_ID is forced for PERF_SAMPLE_READ */
2208 if (read_format & PERF_FORMAT_GROUP) {
2209 sz = sample->read.group.nr *
2210 sizeof(struct sample_read_value);
2211 memcpy(array, sample->read.group.values, sz);
2212 array = (void *)array + sz;
2214 *array = sample->read.one.id;
2219 if (type & PERF_SAMPLE_CALLCHAIN) {
2220 sz = (sample->callchain->nr + 1) * sizeof(u64);
2221 memcpy(array, sample->callchain, sz);
2222 array = (void *)array + sz;
2225 if (type & PERF_SAMPLE_RAW) {
2226 u.val32[0] = sample->raw_size;
2227 if (WARN_ONCE(swapped,
2228 "Endianness of raw data not corrected!\n")) {
2230 * Inverse of what is done in perf_evsel__parse_sample
2232 u.val32[0] = bswap_32(u.val32[0]);
2233 u.val32[1] = bswap_32(u.val32[1]);
2234 u.val64 = bswap_64(u.val64);
2237 array = (void *)array + sizeof(u32);
2239 memcpy(array, sample->raw_data, sample->raw_size);
2240 array = (void *)array + sample->raw_size;
2243 if (type & PERF_SAMPLE_BRANCH_STACK) {
2244 sz = sample->branch_stack->nr * sizeof(struct branch_entry);
2246 memcpy(array, sample->branch_stack, sz);
2247 array = (void *)array + sz;
2250 if (type & PERF_SAMPLE_REGS_USER) {
2251 if (sample->user_regs.abi) {
2252 *array++ = sample->user_regs.abi;
2253 sz = hweight_long(sample->user_regs.mask) * sizeof(u64);
2254 memcpy(array, sample->user_regs.regs, sz);
2255 array = (void *)array + sz;
2261 if (type & PERF_SAMPLE_STACK_USER) {
2262 sz = sample->user_stack.size;
2265 memcpy(array, sample->user_stack.data, sz);
2266 array = (void *)array + sz;
2271 if (type & PERF_SAMPLE_WEIGHT) {
2272 *array = sample->weight;
2276 if (type & PERF_SAMPLE_DATA_SRC) {
2277 *array = sample->data_src;
2281 if (type & PERF_SAMPLE_TRANSACTION) {
2282 *array = sample->transaction;
2286 if (type & PERF_SAMPLE_REGS_INTR) {
2287 if (sample->intr_regs.abi) {
2288 *array++ = sample->intr_regs.abi;
2289 sz = hweight_long(sample->intr_regs.mask) * sizeof(u64);
2290 memcpy(array, sample->intr_regs.regs, sz);
2291 array = (void *)array + sz;
2300 struct format_field *perf_evsel__field(struct perf_evsel *evsel, const char *name)
2302 return pevent_find_field(evsel->tp_format, name);
2305 void *perf_evsel__rawptr(struct perf_evsel *evsel, struct perf_sample *sample,
2308 struct format_field *field = perf_evsel__field(evsel, name);
2314 offset = field->offset;
2316 if (field->flags & FIELD_IS_DYNAMIC) {
2317 offset = *(int *)(sample->raw_data + field->offset);
2321 return sample->raw_data + offset;
2324 u64 format_field__intval(struct format_field *field, struct perf_sample *sample,
2328 void *ptr = sample->raw_data + field->offset;
2330 switch (field->size) {
2334 value = *(u16 *)ptr;
2337 value = *(u32 *)ptr;
2340 memcpy(&value, ptr, sizeof(u64));
2349 switch (field->size) {
2351 return bswap_16(value);
2353 return bswap_32(value);
2355 return bswap_64(value);
2363 u64 perf_evsel__intval(struct perf_evsel *evsel, struct perf_sample *sample,
2366 struct format_field *field = perf_evsel__field(evsel, name);
2371 return field ? format_field__intval(field, sample, evsel->needs_swap) : 0;
2374 bool perf_evsel__fallback(struct perf_evsel *evsel, int err,
2375 char *msg, size_t msgsize)
2379 if ((err == ENOENT || err == ENXIO || err == ENODEV) &&
2380 evsel->attr.type == PERF_TYPE_HARDWARE &&
2381 evsel->attr.config == PERF_COUNT_HW_CPU_CYCLES) {
2383 * If it's cycles then fall back to hrtimer based
2384 * cpu-clock-tick sw counter, which is always available even if
2387 * PPC returns ENXIO until 2.6.37 (behavior changed with commit
2390 scnprintf(msg, msgsize, "%s",
2391 "The cycles event is not supported, trying to fall back to cpu-clock-ticks");
2393 evsel->attr.type = PERF_TYPE_SOFTWARE;
2394 evsel->attr.config = PERF_COUNT_SW_CPU_CLOCK;
2396 zfree(&evsel->name);
2398 } else if (err == EACCES && !evsel->attr.exclude_kernel &&
2399 (paranoid = perf_event_paranoid()) > 1) {
2400 const char *name = perf_evsel__name(evsel);
2403 if (asprintf(&new_name, "%s%su", name, strchr(name, ':') ? "" : ":") < 0)
2408 evsel->name = new_name;
2409 scnprintf(msg, msgsize,
2410 "kernel.perf_event_paranoid=%d, trying to fall back to excluding kernel samples", paranoid);
2411 evsel->attr.exclude_kernel = 1;
2419 int perf_evsel__open_strerror(struct perf_evsel *evsel, struct target *target,
2420 int err, char *msg, size_t size)
2422 char sbuf[STRERR_BUFSIZE];
2429 printed = scnprintf(msg, size,
2430 "No permission to enable %s event.\n\n",
2431 perf_evsel__name(evsel));
2433 return scnprintf(msg + printed, size - printed,
2434 "You may not have permission to collect %sstats.\n\n"
2435 "Consider tweaking /proc/sys/kernel/perf_event_paranoid,\n"
2436 "which controls use of the performance events system by\n"
2437 "unprivileged users (without CAP_SYS_ADMIN).\n\n"
2438 "The current value is %d:\n\n"
2439 " -1: Allow use of (almost) all events by all users\n"
2440 ">= 0: Disallow raw tracepoint access by users without CAP_IOC_LOCK\n"
2441 ">= 1: Disallow CPU event access by users without CAP_SYS_ADMIN\n"
2442 ">= 2: Disallow kernel profiling by users without CAP_SYS_ADMIN",
2443 target->system_wide ? "system-wide " : "",
2444 perf_event_paranoid());
2446 return scnprintf(msg, size, "The %s event is not supported.",
2447 perf_evsel__name(evsel));
2449 return scnprintf(msg, size, "%s",
2450 "Too many events are opened.\n"
2451 "Probably the maximum number of open file descriptors has been reached.\n"
2452 "Hint: Try again after reducing the number of events.\n"
2453 "Hint: Try increasing the limit with 'ulimit -n <limit>'");
2455 if ((evsel->attr.sample_type & PERF_SAMPLE_CALLCHAIN) != 0 &&
2456 access("/proc/sys/kernel/perf_event_max_stack", F_OK) == 0)
2457 return scnprintf(msg, size,
2458 "Not enough memory to setup event with callchain.\n"
2459 "Hint: Try tweaking /proc/sys/kernel/perf_event_max_stack\n"
2460 "Hint: Current value: %d", sysctl_perf_event_max_stack);
2463 if (target->cpu_list)
2464 return scnprintf(msg, size, "%s",
2465 "No such device - did you specify an out-of-range profile CPU?");
2468 if (evsel->attr.sample_period != 0)
2469 return scnprintf(msg, size, "%s",
2470 "PMU Hardware doesn't support sampling/overflow-interrupts.");
2471 if (evsel->attr.precise_ip)
2472 return scnprintf(msg, size, "%s",
2473 "\'precise\' request may not be supported. Try removing 'p' modifier.");
2474 #if defined(__i386__) || defined(__x86_64__)
2475 if (evsel->attr.type == PERF_TYPE_HARDWARE)
2476 return scnprintf(msg, size, "%s",
2477 "No hardware sampling interrupt available.\n"
2478 "No APIC? If so then you can boot the kernel with the \"lapic\" boot parameter to force-enable it.");
2482 if (find_process("oprofiled"))
2483 return scnprintf(msg, size,
2484 "The PMU counters are busy/taken by another profiler.\n"
2485 "We found oprofile daemon running, please stop it and try again.");
2488 if (evsel->attr.write_backward && perf_missing_features.write_backward)
2489 return scnprintf(msg, size, "Reading from overwrite event is not supported by this kernel.");
2490 if (perf_missing_features.clockid)
2491 return scnprintf(msg, size, "clockid feature not supported.");
2492 if (perf_missing_features.clockid_wrong)
2493 return scnprintf(msg, size, "wrong clockid (%d).", clockid);
2499 return scnprintf(msg, size,
2500 "The sys_perf_event_open() syscall returned with %d (%s) for event (%s).\n"
2501 "/bin/dmesg may provide additional information.\n"
2502 "No CONFIG_PERF_EVENTS=y kernel support configured?",
2503 err, str_error_r(err, sbuf, sizeof(sbuf)),
2504 perf_evsel__name(evsel));
2507 char *perf_evsel__env_arch(struct perf_evsel *evsel)
2509 if (evsel && evsel->evlist && evsel->evlist->env)
2510 return evsel->evlist->env->arch;