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/debugfs.h>
13 #include <traceevent/event-parse.h>
14 #include <linux/hw_breakpoint.h>
15 #include <linux/perf_event.h>
16 #include <sys/resource.h>
18 #include "callchain.h"
24 #include "thread_map.h"
26 #include "perf_regs.h"
28 #include "trace-event.h"
37 } perf_missing_features;
39 static clockid_t clockid;
41 static int perf_evsel__no_extra_init(struct perf_evsel *evsel __maybe_unused)
46 static void perf_evsel__no_extra_fini(struct perf_evsel *evsel __maybe_unused)
52 int (*init)(struct perf_evsel *evsel);
53 void (*fini)(struct perf_evsel *evsel);
54 } perf_evsel__object = {
55 .size = sizeof(struct perf_evsel),
56 .init = perf_evsel__no_extra_init,
57 .fini = perf_evsel__no_extra_fini,
60 int perf_evsel__object_config(size_t object_size,
61 int (*init)(struct perf_evsel *evsel),
62 void (*fini)(struct perf_evsel *evsel))
68 if (perf_evsel__object.size > object_size)
71 perf_evsel__object.size = object_size;
75 perf_evsel__object.init = init;
78 perf_evsel__object.fini = fini;
83 #define FD(e, x, y) (*(int *)xyarray__entry(e->fd, x, y))
85 int __perf_evsel__sample_size(u64 sample_type)
87 u64 mask = sample_type & PERF_SAMPLE_MASK;
91 for (i = 0; i < 64; i++) {
92 if (mask & (1ULL << i))
102 * __perf_evsel__calc_id_pos - calculate id_pos.
103 * @sample_type: sample type
105 * This function returns the position of the event id (PERF_SAMPLE_ID or
106 * PERF_SAMPLE_IDENTIFIER) in a sample event i.e. in the array of struct
109 static int __perf_evsel__calc_id_pos(u64 sample_type)
113 if (sample_type & PERF_SAMPLE_IDENTIFIER)
116 if (!(sample_type & PERF_SAMPLE_ID))
119 if (sample_type & PERF_SAMPLE_IP)
122 if (sample_type & PERF_SAMPLE_TID)
125 if (sample_type & PERF_SAMPLE_TIME)
128 if (sample_type & PERF_SAMPLE_ADDR)
135 * __perf_evsel__calc_is_pos - calculate is_pos.
136 * @sample_type: sample type
138 * This function returns the position (counting backwards) of the event id
139 * (PERF_SAMPLE_ID or PERF_SAMPLE_IDENTIFIER) in a non-sample event i.e. if
140 * sample_id_all is used there is an id sample appended to non-sample events.
142 static int __perf_evsel__calc_is_pos(u64 sample_type)
146 if (sample_type & PERF_SAMPLE_IDENTIFIER)
149 if (!(sample_type & PERF_SAMPLE_ID))
152 if (sample_type & PERF_SAMPLE_CPU)
155 if (sample_type & PERF_SAMPLE_STREAM_ID)
161 void perf_evsel__calc_id_pos(struct perf_evsel *evsel)
163 evsel->id_pos = __perf_evsel__calc_id_pos(evsel->attr.sample_type);
164 evsel->is_pos = __perf_evsel__calc_is_pos(evsel->attr.sample_type);
167 void __perf_evsel__set_sample_bit(struct perf_evsel *evsel,
168 enum perf_event_sample_format bit)
170 if (!(evsel->attr.sample_type & bit)) {
171 evsel->attr.sample_type |= bit;
172 evsel->sample_size += sizeof(u64);
173 perf_evsel__calc_id_pos(evsel);
177 void __perf_evsel__reset_sample_bit(struct perf_evsel *evsel,
178 enum perf_event_sample_format bit)
180 if (evsel->attr.sample_type & bit) {
181 evsel->attr.sample_type &= ~bit;
182 evsel->sample_size -= sizeof(u64);
183 perf_evsel__calc_id_pos(evsel);
187 void perf_evsel__set_sample_id(struct perf_evsel *evsel,
188 bool can_sample_identifier)
190 if (can_sample_identifier) {
191 perf_evsel__reset_sample_bit(evsel, ID);
192 perf_evsel__set_sample_bit(evsel, IDENTIFIER);
194 perf_evsel__set_sample_bit(evsel, ID);
196 evsel->attr.read_format |= PERF_FORMAT_ID;
199 void perf_evsel__init(struct perf_evsel *evsel,
200 struct perf_event_attr *attr, int idx)
203 evsel->tracking = !idx;
205 evsel->leader = evsel;
208 INIT_LIST_HEAD(&evsel->node);
209 perf_evsel__object.init(evsel);
210 evsel->sample_size = __perf_evsel__sample_size(attr->sample_type);
211 perf_evsel__calc_id_pos(evsel);
214 struct perf_evsel *perf_evsel__new_idx(struct perf_event_attr *attr, int idx)
216 struct perf_evsel *evsel = zalloc(perf_evsel__object.size);
219 perf_evsel__init(evsel, attr, idx);
224 struct perf_evsel *perf_evsel__newtp_idx(const char *sys, const char *name, int idx)
226 struct perf_evsel *evsel = zalloc(perf_evsel__object.size);
229 struct perf_event_attr attr = {
230 .type = PERF_TYPE_TRACEPOINT,
231 .sample_type = (PERF_SAMPLE_RAW | PERF_SAMPLE_TIME |
232 PERF_SAMPLE_CPU | PERF_SAMPLE_PERIOD),
235 if (asprintf(&evsel->name, "%s:%s", sys, name) < 0)
238 evsel->tp_format = trace_event__tp_format(sys, name);
239 if (evsel->tp_format == NULL)
242 event_attr_init(&attr);
243 attr.config = evsel->tp_format->id;
244 attr.sample_period = 1;
245 perf_evsel__init(evsel, &attr, idx);
256 const char *perf_evsel__hw_names[PERF_COUNT_HW_MAX] = {
264 "stalled-cycles-frontend",
265 "stalled-cycles-backend",
269 static const char *__perf_evsel__hw_name(u64 config)
271 if (config < PERF_COUNT_HW_MAX && perf_evsel__hw_names[config])
272 return perf_evsel__hw_names[config];
274 return "unknown-hardware";
277 static int perf_evsel__add_modifiers(struct perf_evsel *evsel, char *bf, size_t size)
279 int colon = 0, r = 0;
280 struct perf_event_attr *attr = &evsel->attr;
281 bool exclude_guest_default = false;
283 #define MOD_PRINT(context, mod) do { \
284 if (!attr->exclude_##context) { \
285 if (!colon) colon = ++r; \
286 r += scnprintf(bf + r, size - r, "%c", mod); \
289 if (attr->exclude_kernel || attr->exclude_user || attr->exclude_hv) {
290 MOD_PRINT(kernel, 'k');
291 MOD_PRINT(user, 'u');
293 exclude_guest_default = true;
296 if (attr->precise_ip) {
299 r += scnprintf(bf + r, size - r, "%.*s", attr->precise_ip, "ppp");
300 exclude_guest_default = true;
303 if (attr->exclude_host || attr->exclude_guest == exclude_guest_default) {
304 MOD_PRINT(host, 'H');
305 MOD_PRINT(guest, 'G');
313 static int perf_evsel__hw_name(struct perf_evsel *evsel, char *bf, size_t size)
315 int r = scnprintf(bf, size, "%s", __perf_evsel__hw_name(evsel->attr.config));
316 return r + perf_evsel__add_modifiers(evsel, bf + r, size - r);
319 const char *perf_evsel__sw_names[PERF_COUNT_SW_MAX] = {
332 static const char *__perf_evsel__sw_name(u64 config)
334 if (config < PERF_COUNT_SW_MAX && perf_evsel__sw_names[config])
335 return perf_evsel__sw_names[config];
336 return "unknown-software";
339 static int perf_evsel__sw_name(struct perf_evsel *evsel, char *bf, size_t size)
341 int r = scnprintf(bf, size, "%s", __perf_evsel__sw_name(evsel->attr.config));
342 return r + perf_evsel__add_modifiers(evsel, bf + r, size - r);
345 static int __perf_evsel__bp_name(char *bf, size_t size, u64 addr, u64 type)
349 r = scnprintf(bf, size, "mem:0x%" PRIx64 ":", addr);
351 if (type & HW_BREAKPOINT_R)
352 r += scnprintf(bf + r, size - r, "r");
354 if (type & HW_BREAKPOINT_W)
355 r += scnprintf(bf + r, size - r, "w");
357 if (type & HW_BREAKPOINT_X)
358 r += scnprintf(bf + r, size - r, "x");
363 static int perf_evsel__bp_name(struct perf_evsel *evsel, char *bf, size_t size)
365 struct perf_event_attr *attr = &evsel->attr;
366 int r = __perf_evsel__bp_name(bf, size, attr->bp_addr, attr->bp_type);
367 return r + perf_evsel__add_modifiers(evsel, bf + r, size - r);
370 const char *perf_evsel__hw_cache[PERF_COUNT_HW_CACHE_MAX]
371 [PERF_EVSEL__MAX_ALIASES] = {
372 { "L1-dcache", "l1-d", "l1d", "L1-data", },
373 { "L1-icache", "l1-i", "l1i", "L1-instruction", },
375 { "dTLB", "d-tlb", "Data-TLB", },
376 { "iTLB", "i-tlb", "Instruction-TLB", },
377 { "branch", "branches", "bpu", "btb", "bpc", },
381 const char *perf_evsel__hw_cache_op[PERF_COUNT_HW_CACHE_OP_MAX]
382 [PERF_EVSEL__MAX_ALIASES] = {
383 { "load", "loads", "read", },
384 { "store", "stores", "write", },
385 { "prefetch", "prefetches", "speculative-read", "speculative-load", },
388 const char *perf_evsel__hw_cache_result[PERF_COUNT_HW_CACHE_RESULT_MAX]
389 [PERF_EVSEL__MAX_ALIASES] = {
390 { "refs", "Reference", "ops", "access", },
391 { "misses", "miss", },
394 #define C(x) PERF_COUNT_HW_CACHE_##x
395 #define CACHE_READ (1 << C(OP_READ))
396 #define CACHE_WRITE (1 << C(OP_WRITE))
397 #define CACHE_PREFETCH (1 << C(OP_PREFETCH))
398 #define COP(x) (1 << x)
401 * cache operartion stat
402 * L1I : Read and prefetch only
403 * ITLB and BPU : Read-only
405 static unsigned long perf_evsel__hw_cache_stat[C(MAX)] = {
406 [C(L1D)] = (CACHE_READ | CACHE_WRITE | CACHE_PREFETCH),
407 [C(L1I)] = (CACHE_READ | CACHE_PREFETCH),
408 [C(LL)] = (CACHE_READ | CACHE_WRITE | CACHE_PREFETCH),
409 [C(DTLB)] = (CACHE_READ | CACHE_WRITE | CACHE_PREFETCH),
410 [C(ITLB)] = (CACHE_READ),
411 [C(BPU)] = (CACHE_READ),
412 [C(NODE)] = (CACHE_READ | CACHE_WRITE | CACHE_PREFETCH),
415 bool perf_evsel__is_cache_op_valid(u8 type, u8 op)
417 if (perf_evsel__hw_cache_stat[type] & COP(op))
418 return true; /* valid */
420 return false; /* invalid */
423 int __perf_evsel__hw_cache_type_op_res_name(u8 type, u8 op, u8 result,
424 char *bf, size_t size)
427 return scnprintf(bf, size, "%s-%s-%s", perf_evsel__hw_cache[type][0],
428 perf_evsel__hw_cache_op[op][0],
429 perf_evsel__hw_cache_result[result][0]);
432 return scnprintf(bf, size, "%s-%s", perf_evsel__hw_cache[type][0],
433 perf_evsel__hw_cache_op[op][1]);
436 static int __perf_evsel__hw_cache_name(u64 config, char *bf, size_t size)
438 u8 op, result, type = (config >> 0) & 0xff;
439 const char *err = "unknown-ext-hardware-cache-type";
441 if (type > PERF_COUNT_HW_CACHE_MAX)
444 op = (config >> 8) & 0xff;
445 err = "unknown-ext-hardware-cache-op";
446 if (op > PERF_COUNT_HW_CACHE_OP_MAX)
449 result = (config >> 16) & 0xff;
450 err = "unknown-ext-hardware-cache-result";
451 if (result > PERF_COUNT_HW_CACHE_RESULT_MAX)
454 err = "invalid-cache";
455 if (!perf_evsel__is_cache_op_valid(type, op))
458 return __perf_evsel__hw_cache_type_op_res_name(type, op, result, bf, size);
460 return scnprintf(bf, size, "%s", err);
463 static int perf_evsel__hw_cache_name(struct perf_evsel *evsel, char *bf, size_t size)
465 int ret = __perf_evsel__hw_cache_name(evsel->attr.config, bf, size);
466 return ret + perf_evsel__add_modifiers(evsel, bf + ret, size - ret);
469 static int perf_evsel__raw_name(struct perf_evsel *evsel, char *bf, size_t size)
471 int ret = scnprintf(bf, size, "raw 0x%" PRIx64, evsel->attr.config);
472 return ret + perf_evsel__add_modifiers(evsel, bf + ret, size - ret);
475 const char *perf_evsel__name(struct perf_evsel *evsel)
482 switch (evsel->attr.type) {
484 perf_evsel__raw_name(evsel, bf, sizeof(bf));
487 case PERF_TYPE_HARDWARE:
488 perf_evsel__hw_name(evsel, bf, sizeof(bf));
491 case PERF_TYPE_HW_CACHE:
492 perf_evsel__hw_cache_name(evsel, bf, sizeof(bf));
495 case PERF_TYPE_SOFTWARE:
496 perf_evsel__sw_name(evsel, bf, sizeof(bf));
499 case PERF_TYPE_TRACEPOINT:
500 scnprintf(bf, sizeof(bf), "%s", "unknown tracepoint");
503 case PERF_TYPE_BREAKPOINT:
504 perf_evsel__bp_name(evsel, bf, sizeof(bf));
508 scnprintf(bf, sizeof(bf), "unknown attr type: %d",
513 evsel->name = strdup(bf);
515 return evsel->name ?: "unknown";
518 const char *perf_evsel__group_name(struct perf_evsel *evsel)
520 return evsel->group_name ?: "anon group";
523 int perf_evsel__group_desc(struct perf_evsel *evsel, char *buf, size_t size)
526 struct perf_evsel *pos;
527 const char *group_name = perf_evsel__group_name(evsel);
529 ret = scnprintf(buf, size, "%s", group_name);
531 ret += scnprintf(buf + ret, size - ret, " { %s",
532 perf_evsel__name(evsel));
534 for_each_group_member(pos, evsel)
535 ret += scnprintf(buf + ret, size - ret, ", %s",
536 perf_evsel__name(pos));
538 ret += scnprintf(buf + ret, size - ret, " }");
544 perf_evsel__config_callgraph(struct perf_evsel *evsel,
545 struct record_opts *opts)
547 bool function = perf_evsel__is_function_event(evsel);
548 struct perf_event_attr *attr = &evsel->attr;
550 perf_evsel__set_sample_bit(evsel, CALLCHAIN);
552 if (callchain_param.record_mode == CALLCHAIN_LBR) {
553 if (!opts->branch_stack) {
554 if (attr->exclude_user) {
555 pr_warning("LBR callstack option is only available "
556 "to get user callchain information. "
557 "Falling back to framepointers.\n");
559 perf_evsel__set_sample_bit(evsel, BRANCH_STACK);
560 attr->branch_sample_type = PERF_SAMPLE_BRANCH_USER |
561 PERF_SAMPLE_BRANCH_CALL_STACK;
564 pr_warning("Cannot use LBR callstack with branch stack. "
565 "Falling back to framepointers.\n");
568 if (callchain_param.record_mode == CALLCHAIN_DWARF) {
570 perf_evsel__set_sample_bit(evsel, REGS_USER);
571 perf_evsel__set_sample_bit(evsel, STACK_USER);
572 attr->sample_regs_user = PERF_REGS_MASK;
573 attr->sample_stack_user = callchain_param.dump_size;
574 attr->exclude_callchain_user = 1;
576 pr_info("Cannot use DWARF unwind for function trace event,"
577 " falling back to framepointers.\n");
582 pr_info("Disabling user space callchains for function trace event.\n");
583 attr->exclude_callchain_user = 1;
588 * The enable_on_exec/disabled value strategy:
590 * 1) For any type of traced program:
591 * - all independent events and group leaders are disabled
592 * - all group members are enabled
594 * Group members are ruled by group leaders. They need to
595 * be enabled, because the group scheduling relies on that.
597 * 2) For traced programs executed by perf:
598 * - all independent events and group leaders have
600 * - we don't specifically enable or disable any event during
603 * Independent events and group leaders are initially disabled
604 * and get enabled by exec. Group members are ruled by group
605 * leaders as stated in 1).
607 * 3) For traced programs attached by perf (pid/tid):
608 * - we specifically enable or disable all events during
611 * When attaching events to already running traced we
612 * enable/disable events specifically, as there's no
613 * initial traced exec call.
615 void perf_evsel__config(struct perf_evsel *evsel, struct record_opts *opts)
617 struct perf_evsel *leader = evsel->leader;
618 struct perf_event_attr *attr = &evsel->attr;
619 int track = evsel->tracking;
620 bool per_cpu = opts->target.default_per_cpu && !opts->target.per_thread;
622 attr->sample_id_all = perf_missing_features.sample_id_all ? 0 : 1;
623 attr->inherit = !opts->no_inherit;
625 perf_evsel__set_sample_bit(evsel, IP);
626 perf_evsel__set_sample_bit(evsel, TID);
628 if (evsel->sample_read) {
629 perf_evsel__set_sample_bit(evsel, READ);
632 * We need ID even in case of single event, because
633 * PERF_SAMPLE_READ process ID specific data.
635 perf_evsel__set_sample_id(evsel, false);
638 * Apply group format only if we belong to group
639 * with more than one members.
641 if (leader->nr_members > 1) {
642 attr->read_format |= PERF_FORMAT_GROUP;
648 * We default some events to have a default interval. But keep
649 * it a weak assumption overridable by the user.
651 if (!attr->sample_period || (opts->user_freq != UINT_MAX ||
652 opts->user_interval != ULLONG_MAX)) {
654 perf_evsel__set_sample_bit(evsel, PERIOD);
656 attr->sample_freq = opts->freq;
658 attr->sample_period = opts->default_interval;
663 * Disable sampling for all group members other
664 * than leader in case leader 'leads' the sampling.
666 if ((leader != evsel) && leader->sample_read) {
667 attr->sample_freq = 0;
668 attr->sample_period = 0;
671 if (opts->no_samples)
672 attr->sample_freq = 0;
674 if (opts->inherit_stat)
675 attr->inherit_stat = 1;
677 if (opts->sample_address) {
678 perf_evsel__set_sample_bit(evsel, ADDR);
679 attr->mmap_data = track;
683 * We don't allow user space callchains for function trace
684 * event, due to issues with page faults while tracing page
685 * fault handler and its overall trickiness nature.
687 if (perf_evsel__is_function_event(evsel))
688 evsel->attr.exclude_callchain_user = 1;
690 if (callchain_param.enabled && !evsel->no_aux_samples)
691 perf_evsel__config_callgraph(evsel, opts);
693 if (opts->sample_intr_regs) {
694 attr->sample_regs_intr = PERF_REGS_MASK;
695 perf_evsel__set_sample_bit(evsel, REGS_INTR);
698 if (target__has_cpu(&opts->target))
699 perf_evsel__set_sample_bit(evsel, CPU);
702 perf_evsel__set_sample_bit(evsel, PERIOD);
705 * When the user explicitely disabled time don't force it here.
707 if (opts->sample_time &&
708 (!perf_missing_features.sample_id_all &&
709 (!opts->no_inherit || target__has_cpu(&opts->target) || per_cpu)))
710 perf_evsel__set_sample_bit(evsel, TIME);
712 if (opts->raw_samples && !evsel->no_aux_samples) {
713 perf_evsel__set_sample_bit(evsel, TIME);
714 perf_evsel__set_sample_bit(evsel, RAW);
715 perf_evsel__set_sample_bit(evsel, CPU);
718 if (opts->sample_address)
719 perf_evsel__set_sample_bit(evsel, DATA_SRC);
721 if (opts->no_buffering) {
723 attr->wakeup_events = 1;
725 if (opts->branch_stack && !evsel->no_aux_samples) {
726 perf_evsel__set_sample_bit(evsel, BRANCH_STACK);
727 attr->branch_sample_type = opts->branch_stack;
730 if (opts->sample_weight)
731 perf_evsel__set_sample_bit(evsel, WEIGHT);
735 attr->mmap2 = track && !perf_missing_features.mmap2;
738 if (opts->sample_transaction)
739 perf_evsel__set_sample_bit(evsel, TRANSACTION);
741 if (opts->running_time) {
742 evsel->attr.read_format |=
743 PERF_FORMAT_TOTAL_TIME_ENABLED |
744 PERF_FORMAT_TOTAL_TIME_RUNNING;
748 * XXX see the function comment above
750 * Disabling only independent events or group leaders,
751 * keeping group members enabled.
753 if (perf_evsel__is_group_leader(evsel))
757 * Setting enable_on_exec for independent events and
758 * group leaders for traced executed by perf.
760 if (target__none(&opts->target) && perf_evsel__is_group_leader(evsel) &&
761 !opts->initial_delay)
762 attr->enable_on_exec = 1;
764 if (evsel->immediate) {
766 attr->enable_on_exec = 0;
769 clockid = opts->clockid;
770 if (opts->use_clockid) {
771 attr->use_clockid = 1;
772 attr->clockid = opts->clockid;
776 static int perf_evsel__alloc_fd(struct perf_evsel *evsel, int ncpus, int nthreads)
780 if (evsel->system_wide)
783 evsel->fd = xyarray__new(ncpus, nthreads, sizeof(int));
786 for (cpu = 0; cpu < ncpus; cpu++) {
787 for (thread = 0; thread < nthreads; thread++) {
788 FD(evsel, cpu, thread) = -1;
793 return evsel->fd != NULL ? 0 : -ENOMEM;
796 static int perf_evsel__run_ioctl(struct perf_evsel *evsel, int ncpus, int nthreads,
801 if (evsel->system_wide)
804 for (cpu = 0; cpu < ncpus; cpu++) {
805 for (thread = 0; thread < nthreads; thread++) {
806 int fd = FD(evsel, cpu, thread),
807 err = ioctl(fd, ioc, arg);
817 int perf_evsel__set_filter(struct perf_evsel *evsel, int ncpus, int nthreads,
820 return perf_evsel__run_ioctl(evsel, ncpus, nthreads,
821 PERF_EVENT_IOC_SET_FILTER,
825 int perf_evsel__enable(struct perf_evsel *evsel, int ncpus, int nthreads)
827 return perf_evsel__run_ioctl(evsel, ncpus, nthreads,
828 PERF_EVENT_IOC_ENABLE,
832 int perf_evsel__alloc_id(struct perf_evsel *evsel, int ncpus, int nthreads)
834 if (ncpus == 0 || nthreads == 0)
837 if (evsel->system_wide)
840 evsel->sample_id = xyarray__new(ncpus, nthreads, sizeof(struct perf_sample_id));
841 if (evsel->sample_id == NULL)
844 evsel->id = zalloc(ncpus * nthreads * sizeof(u64));
845 if (evsel->id == NULL) {
846 xyarray__delete(evsel->sample_id);
847 evsel->sample_id = NULL;
854 void perf_evsel__reset_counts(struct perf_evsel *evsel, int ncpus)
856 memset(evsel->counts, 0, (sizeof(*evsel->counts) +
857 (ncpus * sizeof(struct perf_counts_values))));
860 int perf_evsel__alloc_counts(struct perf_evsel *evsel, int ncpus)
862 evsel->counts = zalloc((sizeof(*evsel->counts) +
863 (ncpus * sizeof(struct perf_counts_values))));
864 return evsel->counts != NULL ? 0 : -ENOMEM;
867 static void perf_evsel__free_fd(struct perf_evsel *evsel)
869 xyarray__delete(evsel->fd);
873 static void perf_evsel__free_id(struct perf_evsel *evsel)
875 xyarray__delete(evsel->sample_id);
876 evsel->sample_id = NULL;
880 void perf_evsel__close_fd(struct perf_evsel *evsel, int ncpus, int nthreads)
884 if (evsel->system_wide)
887 for (cpu = 0; cpu < ncpus; cpu++)
888 for (thread = 0; thread < nthreads; ++thread) {
889 close(FD(evsel, cpu, thread));
890 FD(evsel, cpu, thread) = -1;
894 void perf_evsel__free_counts(struct perf_evsel *evsel)
896 zfree(&evsel->counts);
899 void perf_evsel__exit(struct perf_evsel *evsel)
901 assert(list_empty(&evsel->node));
902 perf_evsel__free_fd(evsel);
903 perf_evsel__free_id(evsel);
904 close_cgroup(evsel->cgrp);
905 zfree(&evsel->group_name);
907 perf_evsel__object.fini(evsel);
910 void perf_evsel__delete(struct perf_evsel *evsel)
912 perf_evsel__exit(evsel);
916 void perf_evsel__compute_deltas(struct perf_evsel *evsel, int cpu,
917 struct perf_counts_values *count)
919 struct perf_counts_values tmp;
921 if (!evsel->prev_raw_counts)
925 tmp = evsel->prev_raw_counts->aggr;
926 evsel->prev_raw_counts->aggr = *count;
928 tmp = evsel->prev_raw_counts->cpu[cpu];
929 evsel->prev_raw_counts->cpu[cpu] = *count;
932 count->val = count->val - tmp.val;
933 count->ena = count->ena - tmp.ena;
934 count->run = count->run - tmp.run;
937 void perf_counts_values__scale(struct perf_counts_values *count,
938 bool scale, s8 *pscaled)
943 if (count->run == 0) {
946 } else if (count->run < count->ena) {
948 count->val = (u64)((double) count->val * count->ena / count->run + 0.5);
951 count->ena = count->run = 0;
957 int perf_evsel__read_cb(struct perf_evsel *evsel, int cpu, int thread,
958 perf_evsel__read_cb_t cb)
960 struct perf_counts_values count;
962 memset(&count, 0, sizeof(count));
964 if (FD(evsel, cpu, thread) < 0)
967 if (readn(FD(evsel, cpu, thread), &count, sizeof(count)) < 0)
970 return cb(evsel, cpu, thread, &count);
973 int __perf_evsel__read_on_cpu(struct perf_evsel *evsel,
974 int cpu, int thread, bool scale)
976 struct perf_counts_values count;
977 size_t nv = scale ? 3 : 1;
979 if (FD(evsel, cpu, thread) < 0)
982 if (evsel->counts == NULL && perf_evsel__alloc_counts(evsel, cpu + 1) < 0)
985 if (readn(FD(evsel, cpu, thread), &count, nv * sizeof(u64)) < 0)
988 perf_evsel__compute_deltas(evsel, cpu, &count);
989 perf_counts_values__scale(&count, scale, NULL);
990 evsel->counts->cpu[cpu] = count;
994 static int get_group_fd(struct perf_evsel *evsel, int cpu, int thread)
996 struct perf_evsel *leader = evsel->leader;
999 if (perf_evsel__is_group_leader(evsel))
1003 * Leader must be already processed/open,
1004 * if not it's a bug.
1006 BUG_ON(!leader->fd);
1008 fd = FD(leader, cpu, thread);
1019 static void __p_bits(char *buf, size_t size, u64 value, struct bit_names *bits)
1021 bool first_bit = true;
1025 if (value & bits[i].bit) {
1026 buf += scnprintf(buf, size, "%s%s", first_bit ? "" : "|", bits[i].name);
1029 } while (bits[++i].name != NULL);
1032 static void __p_sample_type(char *buf, size_t size, u64 value)
1034 #define bit_name(n) { PERF_SAMPLE_##n, #n }
1035 struct bit_names bits[] = {
1036 bit_name(IP), bit_name(TID), bit_name(TIME), bit_name(ADDR),
1037 bit_name(READ), bit_name(CALLCHAIN), bit_name(ID), bit_name(CPU),
1038 bit_name(PERIOD), bit_name(STREAM_ID), bit_name(RAW),
1039 bit_name(BRANCH_STACK), bit_name(REGS_USER), bit_name(STACK_USER),
1040 bit_name(IDENTIFIER), bit_name(REGS_INTR),
1044 __p_bits(buf, size, value, bits);
1047 static void __p_read_format(char *buf, size_t size, u64 value)
1049 #define bit_name(n) { PERF_FORMAT_##n, #n }
1050 struct bit_names bits[] = {
1051 bit_name(TOTAL_TIME_ENABLED), bit_name(TOTAL_TIME_RUNNING),
1052 bit_name(ID), bit_name(GROUP),
1056 __p_bits(buf, size, value, bits);
1059 #define BUF_SIZE 1024
1061 #define p_hex(val) snprintf(buf, BUF_SIZE, "%"PRIx64, (uint64_t)(val))
1062 #define p_unsigned(val) snprintf(buf, BUF_SIZE, "%"PRIu64, (uint64_t)(val))
1063 #define p_signed(val) snprintf(buf, BUF_SIZE, "%"PRId64, (int64_t)(val))
1064 #define p_sample_type(val) __p_sample_type(buf, BUF_SIZE, val)
1065 #define p_read_format(val) __p_read_format(buf, BUF_SIZE, val)
1067 #define PRINT_ATTRn(_n, _f, _p) \
1071 ret += attr__fprintf(fp, _n, buf, priv);\
1075 #define PRINT_ATTRf(_f, _p) PRINT_ATTRn(#_f, _f, _p)
1077 int perf_event_attr__fprintf(FILE *fp, struct perf_event_attr *attr,
1078 attr__fprintf_f attr__fprintf, void *priv)
1083 PRINT_ATTRf(type, p_unsigned);
1084 PRINT_ATTRf(size, p_unsigned);
1085 PRINT_ATTRf(config, p_hex);
1086 PRINT_ATTRn("{ sample_period, sample_freq }", sample_period, p_unsigned);
1087 PRINT_ATTRf(sample_type, p_sample_type);
1088 PRINT_ATTRf(read_format, p_read_format);
1090 PRINT_ATTRf(disabled, p_unsigned);
1091 PRINT_ATTRf(inherit, p_unsigned);
1092 PRINT_ATTRf(pinned, p_unsigned);
1093 PRINT_ATTRf(exclusive, p_unsigned);
1094 PRINT_ATTRf(exclude_user, p_unsigned);
1095 PRINT_ATTRf(exclude_kernel, p_unsigned);
1096 PRINT_ATTRf(exclude_hv, p_unsigned);
1097 PRINT_ATTRf(exclude_idle, p_unsigned);
1098 PRINT_ATTRf(mmap, p_unsigned);
1099 PRINT_ATTRf(comm, p_unsigned);
1100 PRINT_ATTRf(freq, p_unsigned);
1101 PRINT_ATTRf(inherit_stat, p_unsigned);
1102 PRINT_ATTRf(enable_on_exec, p_unsigned);
1103 PRINT_ATTRf(task, p_unsigned);
1104 PRINT_ATTRf(watermark, p_unsigned);
1105 PRINT_ATTRf(precise_ip, p_unsigned);
1106 PRINT_ATTRf(mmap_data, p_unsigned);
1107 PRINT_ATTRf(sample_id_all, p_unsigned);
1108 PRINT_ATTRf(exclude_host, p_unsigned);
1109 PRINT_ATTRf(exclude_guest, p_unsigned);
1110 PRINT_ATTRf(exclude_callchain_kernel, p_unsigned);
1111 PRINT_ATTRf(exclude_callchain_user, p_unsigned);
1112 PRINT_ATTRf(mmap2, p_unsigned);
1113 PRINT_ATTRf(comm_exec, p_unsigned);
1114 PRINT_ATTRf(use_clockid, p_unsigned);
1116 PRINT_ATTRn("{ wakeup_events, wakeup_watermark }", wakeup_events, p_unsigned);
1117 PRINT_ATTRf(bp_type, p_unsigned);
1118 PRINT_ATTRn("{ bp_addr, config1 }", bp_addr, p_hex);
1119 PRINT_ATTRn("{ bp_len, config2 }", bp_len, p_hex);
1120 PRINT_ATTRf(sample_regs_user, p_hex);
1121 PRINT_ATTRf(sample_stack_user, p_unsigned);
1122 PRINT_ATTRf(clockid, p_signed);
1123 PRINT_ATTRf(sample_regs_intr, p_hex);
1124 PRINT_ATTRf(aux_watermark, p_unsigned);
1129 static int __open_attr__fprintf(FILE *fp, const char *name, const char *val,
1130 void *priv __attribute__((unused)))
1132 return fprintf(fp, " %-32s %s\n", name, val);
1135 static int __perf_evsel__open(struct perf_evsel *evsel, struct cpu_map *cpus,
1136 struct thread_map *threads)
1138 int cpu, thread, nthreads;
1139 unsigned long flags = PERF_FLAG_FD_CLOEXEC;
1141 enum { NO_CHANGE, SET_TO_MAX, INCREASED_MAX } set_rlimit = NO_CHANGE;
1143 if (evsel->system_wide)
1146 nthreads = threads->nr;
1148 if (evsel->fd == NULL &&
1149 perf_evsel__alloc_fd(evsel, cpus->nr, nthreads) < 0)
1153 flags |= PERF_FLAG_PID_CGROUP;
1154 pid = evsel->cgrp->fd;
1157 fallback_missing_features:
1158 if (perf_missing_features.clockid_wrong)
1159 evsel->attr.clockid = CLOCK_MONOTONIC; /* should always work */
1160 if (perf_missing_features.clockid) {
1161 evsel->attr.use_clockid = 0;
1162 evsel->attr.clockid = 0;
1164 if (perf_missing_features.cloexec)
1165 flags &= ~(unsigned long)PERF_FLAG_FD_CLOEXEC;
1166 if (perf_missing_features.mmap2)
1167 evsel->attr.mmap2 = 0;
1168 if (perf_missing_features.exclude_guest)
1169 evsel->attr.exclude_guest = evsel->attr.exclude_host = 0;
1171 if (perf_missing_features.sample_id_all)
1172 evsel->attr.sample_id_all = 0;
1175 fprintf(stderr, "%.60s\n", graph_dotted_line);
1176 fprintf(stderr, "perf_event_attr:\n");
1177 perf_event_attr__fprintf(stderr, &evsel->attr, __open_attr__fprintf, NULL);
1178 fprintf(stderr, "%.60s\n", graph_dotted_line);
1181 for (cpu = 0; cpu < cpus->nr; cpu++) {
1183 for (thread = 0; thread < nthreads; thread++) {
1186 if (!evsel->cgrp && !evsel->system_wide)
1187 pid = threads->map[thread];
1189 group_fd = get_group_fd(evsel, cpu, thread);
1191 pr_debug2("sys_perf_event_open: pid %d cpu %d group_fd %d flags %#lx\n",
1192 pid, cpus->map[cpu], group_fd, flags);
1194 FD(evsel, cpu, thread) = sys_perf_event_open(&evsel->attr,
1198 if (FD(evsel, cpu, thread) < 0) {
1200 pr_debug2("sys_perf_event_open failed, error %d\n",
1204 set_rlimit = NO_CHANGE;
1207 * If we succeeded but had to kill clockid, fail and
1208 * have perf_evsel__open_strerror() print us a nice
1211 if (perf_missing_features.clockid ||
1212 perf_missing_features.clockid_wrong) {
1223 * perf stat needs between 5 and 22 fds per CPU. When we run out
1224 * of them try to increase the limits.
1226 if (err == -EMFILE && set_rlimit < INCREASED_MAX) {
1228 int old_errno = errno;
1230 if (getrlimit(RLIMIT_NOFILE, &l) == 0) {
1231 if (set_rlimit == NO_CHANGE)
1232 l.rlim_cur = l.rlim_max;
1234 l.rlim_cur = l.rlim_max + 1000;
1235 l.rlim_max = l.rlim_cur;
1237 if (setrlimit(RLIMIT_NOFILE, &l) == 0) {
1246 if (err != -EINVAL || cpu > 0 || thread > 0)
1250 * Must probe features in the order they were added to the
1251 * perf_event_attr interface.
1253 if (!perf_missing_features.clockid_wrong && evsel->attr.use_clockid) {
1254 perf_missing_features.clockid_wrong = true;
1255 goto fallback_missing_features;
1256 } else if (!perf_missing_features.clockid && evsel->attr.use_clockid) {
1257 perf_missing_features.clockid = true;
1258 goto fallback_missing_features;
1259 } else if (!perf_missing_features.cloexec && (flags & PERF_FLAG_FD_CLOEXEC)) {
1260 perf_missing_features.cloexec = true;
1261 goto fallback_missing_features;
1262 } else if (!perf_missing_features.mmap2 && evsel->attr.mmap2) {
1263 perf_missing_features.mmap2 = true;
1264 goto fallback_missing_features;
1265 } else if (!perf_missing_features.exclude_guest &&
1266 (evsel->attr.exclude_guest || evsel->attr.exclude_host)) {
1267 perf_missing_features.exclude_guest = true;
1268 goto fallback_missing_features;
1269 } else if (!perf_missing_features.sample_id_all) {
1270 perf_missing_features.sample_id_all = true;
1271 goto retry_sample_id;
1276 while (--thread >= 0) {
1277 close(FD(evsel, cpu, thread));
1278 FD(evsel, cpu, thread) = -1;
1281 } while (--cpu >= 0);
1285 void perf_evsel__close(struct perf_evsel *evsel, int ncpus, int nthreads)
1287 if (evsel->fd == NULL)
1290 perf_evsel__close_fd(evsel, ncpus, nthreads);
1291 perf_evsel__free_fd(evsel);
1303 struct thread_map map;
1305 } empty_thread_map = {
1310 int perf_evsel__open(struct perf_evsel *evsel, struct cpu_map *cpus,
1311 struct thread_map *threads)
1314 /* Work around old compiler warnings about strict aliasing */
1315 cpus = &empty_cpu_map.map;
1318 if (threads == NULL)
1319 threads = &empty_thread_map.map;
1321 return __perf_evsel__open(evsel, cpus, threads);
1324 int perf_evsel__open_per_cpu(struct perf_evsel *evsel,
1325 struct cpu_map *cpus)
1327 return __perf_evsel__open(evsel, cpus, &empty_thread_map.map);
1330 int perf_evsel__open_per_thread(struct perf_evsel *evsel,
1331 struct thread_map *threads)
1333 return __perf_evsel__open(evsel, &empty_cpu_map.map, threads);
1336 static int perf_evsel__parse_id_sample(const struct perf_evsel *evsel,
1337 const union perf_event *event,
1338 struct perf_sample *sample)
1340 u64 type = evsel->attr.sample_type;
1341 const u64 *array = event->sample.array;
1342 bool swapped = evsel->needs_swap;
1345 array += ((event->header.size -
1346 sizeof(event->header)) / sizeof(u64)) - 1;
1348 if (type & PERF_SAMPLE_IDENTIFIER) {
1349 sample->id = *array;
1353 if (type & PERF_SAMPLE_CPU) {
1356 /* undo swap of u64, then swap on individual u32s */
1357 u.val64 = bswap_64(u.val64);
1358 u.val32[0] = bswap_32(u.val32[0]);
1361 sample->cpu = u.val32[0];
1365 if (type & PERF_SAMPLE_STREAM_ID) {
1366 sample->stream_id = *array;
1370 if (type & PERF_SAMPLE_ID) {
1371 sample->id = *array;
1375 if (type & PERF_SAMPLE_TIME) {
1376 sample->time = *array;
1380 if (type & PERF_SAMPLE_TID) {
1383 /* undo swap of u64, then swap on individual u32s */
1384 u.val64 = bswap_64(u.val64);
1385 u.val32[0] = bswap_32(u.val32[0]);
1386 u.val32[1] = bswap_32(u.val32[1]);
1389 sample->pid = u.val32[0];
1390 sample->tid = u.val32[1];
1397 static inline bool overflow(const void *endp, u16 max_size, const void *offset,
1400 return size > max_size || offset + size > endp;
1403 #define OVERFLOW_CHECK(offset, size, max_size) \
1405 if (overflow(endp, (max_size), (offset), (size))) \
1409 #define OVERFLOW_CHECK_u64(offset) \
1410 OVERFLOW_CHECK(offset, sizeof(u64), sizeof(u64))
1412 int perf_evsel__parse_sample(struct perf_evsel *evsel, union perf_event *event,
1413 struct perf_sample *data)
1415 u64 type = evsel->attr.sample_type;
1416 bool swapped = evsel->needs_swap;
1418 u16 max_size = event->header.size;
1419 const void *endp = (void *)event + max_size;
1423 * used for cross-endian analysis. See git commit 65014ab3
1424 * for why this goofiness is needed.
1428 memset(data, 0, sizeof(*data));
1429 data->cpu = data->pid = data->tid = -1;
1430 data->stream_id = data->id = data->time = -1ULL;
1431 data->period = evsel->attr.sample_period;
1434 if (event->header.type != PERF_RECORD_SAMPLE) {
1435 if (!evsel->attr.sample_id_all)
1437 return perf_evsel__parse_id_sample(evsel, event, data);
1440 array = event->sample.array;
1443 * The evsel's sample_size is based on PERF_SAMPLE_MASK which includes
1444 * up to PERF_SAMPLE_PERIOD. After that overflow() must be used to
1445 * check the format does not go past the end of the event.
1447 if (evsel->sample_size + sizeof(event->header) > event->header.size)
1451 if (type & PERF_SAMPLE_IDENTIFIER) {
1456 if (type & PERF_SAMPLE_IP) {
1461 if (type & PERF_SAMPLE_TID) {
1464 /* undo swap of u64, then swap on individual u32s */
1465 u.val64 = bswap_64(u.val64);
1466 u.val32[0] = bswap_32(u.val32[0]);
1467 u.val32[1] = bswap_32(u.val32[1]);
1470 data->pid = u.val32[0];
1471 data->tid = u.val32[1];
1475 if (type & PERF_SAMPLE_TIME) {
1476 data->time = *array;
1481 if (type & PERF_SAMPLE_ADDR) {
1482 data->addr = *array;
1486 if (type & PERF_SAMPLE_ID) {
1491 if (type & PERF_SAMPLE_STREAM_ID) {
1492 data->stream_id = *array;
1496 if (type & PERF_SAMPLE_CPU) {
1500 /* undo swap of u64, then swap on individual u32s */
1501 u.val64 = bswap_64(u.val64);
1502 u.val32[0] = bswap_32(u.val32[0]);
1505 data->cpu = u.val32[0];
1509 if (type & PERF_SAMPLE_PERIOD) {
1510 data->period = *array;
1514 if (type & PERF_SAMPLE_READ) {
1515 u64 read_format = evsel->attr.read_format;
1517 OVERFLOW_CHECK_u64(array);
1518 if (read_format & PERF_FORMAT_GROUP)
1519 data->read.group.nr = *array;
1521 data->read.one.value = *array;
1525 if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED) {
1526 OVERFLOW_CHECK_u64(array);
1527 data->read.time_enabled = *array;
1531 if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING) {
1532 OVERFLOW_CHECK_u64(array);
1533 data->read.time_running = *array;
1537 /* PERF_FORMAT_ID is forced for PERF_SAMPLE_READ */
1538 if (read_format & PERF_FORMAT_GROUP) {
1539 const u64 max_group_nr = UINT64_MAX /
1540 sizeof(struct sample_read_value);
1542 if (data->read.group.nr > max_group_nr)
1544 sz = data->read.group.nr *
1545 sizeof(struct sample_read_value);
1546 OVERFLOW_CHECK(array, sz, max_size);
1547 data->read.group.values =
1548 (struct sample_read_value *)array;
1549 array = (void *)array + sz;
1551 OVERFLOW_CHECK_u64(array);
1552 data->read.one.id = *array;
1557 if (type & PERF_SAMPLE_CALLCHAIN) {
1558 const u64 max_callchain_nr = UINT64_MAX / sizeof(u64);
1560 OVERFLOW_CHECK_u64(array);
1561 data->callchain = (struct ip_callchain *)array++;
1562 if (data->callchain->nr > max_callchain_nr)
1564 sz = data->callchain->nr * sizeof(u64);
1565 OVERFLOW_CHECK(array, sz, max_size);
1566 array = (void *)array + sz;
1569 if (type & PERF_SAMPLE_RAW) {
1570 OVERFLOW_CHECK_u64(array);
1572 if (WARN_ONCE(swapped,
1573 "Endianness of raw data not corrected!\n")) {
1574 /* undo swap of u64, then swap on individual u32s */
1575 u.val64 = bswap_64(u.val64);
1576 u.val32[0] = bswap_32(u.val32[0]);
1577 u.val32[1] = bswap_32(u.val32[1]);
1579 data->raw_size = u.val32[0];
1580 array = (void *)array + sizeof(u32);
1582 OVERFLOW_CHECK(array, data->raw_size, max_size);
1583 data->raw_data = (void *)array;
1584 array = (void *)array + data->raw_size;
1587 if (type & PERF_SAMPLE_BRANCH_STACK) {
1588 const u64 max_branch_nr = UINT64_MAX /
1589 sizeof(struct branch_entry);
1591 OVERFLOW_CHECK_u64(array);
1592 data->branch_stack = (struct branch_stack *)array++;
1594 if (data->branch_stack->nr > max_branch_nr)
1596 sz = data->branch_stack->nr * sizeof(struct branch_entry);
1597 OVERFLOW_CHECK(array, sz, max_size);
1598 array = (void *)array + sz;
1601 if (type & PERF_SAMPLE_REGS_USER) {
1602 OVERFLOW_CHECK_u64(array);
1603 data->user_regs.abi = *array;
1606 if (data->user_regs.abi) {
1607 u64 mask = evsel->attr.sample_regs_user;
1609 sz = hweight_long(mask) * sizeof(u64);
1610 OVERFLOW_CHECK(array, sz, max_size);
1611 data->user_regs.mask = mask;
1612 data->user_regs.regs = (u64 *)array;
1613 array = (void *)array + sz;
1617 if (type & PERF_SAMPLE_STACK_USER) {
1618 OVERFLOW_CHECK_u64(array);
1621 data->user_stack.offset = ((char *)(array - 1)
1625 data->user_stack.size = 0;
1627 OVERFLOW_CHECK(array, sz, max_size);
1628 data->user_stack.data = (char *)array;
1629 array = (void *)array + sz;
1630 OVERFLOW_CHECK_u64(array);
1631 data->user_stack.size = *array++;
1632 if (WARN_ONCE(data->user_stack.size > sz,
1633 "user stack dump failure\n"))
1639 if (type & PERF_SAMPLE_WEIGHT) {
1640 OVERFLOW_CHECK_u64(array);
1641 data->weight = *array;
1645 data->data_src = PERF_MEM_DATA_SRC_NONE;
1646 if (type & PERF_SAMPLE_DATA_SRC) {
1647 OVERFLOW_CHECK_u64(array);
1648 data->data_src = *array;
1652 data->transaction = 0;
1653 if (type & PERF_SAMPLE_TRANSACTION) {
1654 OVERFLOW_CHECK_u64(array);
1655 data->transaction = *array;
1659 data->intr_regs.abi = PERF_SAMPLE_REGS_ABI_NONE;
1660 if (type & PERF_SAMPLE_REGS_INTR) {
1661 OVERFLOW_CHECK_u64(array);
1662 data->intr_regs.abi = *array;
1665 if (data->intr_regs.abi != PERF_SAMPLE_REGS_ABI_NONE) {
1666 u64 mask = evsel->attr.sample_regs_intr;
1668 sz = hweight_long(mask) * sizeof(u64);
1669 OVERFLOW_CHECK(array, sz, max_size);
1670 data->intr_regs.mask = mask;
1671 data->intr_regs.regs = (u64 *)array;
1672 array = (void *)array + sz;
1679 size_t perf_event__sample_event_size(const struct perf_sample *sample, u64 type,
1682 size_t sz, result = sizeof(struct sample_event);
1684 if (type & PERF_SAMPLE_IDENTIFIER)
1685 result += sizeof(u64);
1687 if (type & PERF_SAMPLE_IP)
1688 result += sizeof(u64);
1690 if (type & PERF_SAMPLE_TID)
1691 result += sizeof(u64);
1693 if (type & PERF_SAMPLE_TIME)
1694 result += sizeof(u64);
1696 if (type & PERF_SAMPLE_ADDR)
1697 result += sizeof(u64);
1699 if (type & PERF_SAMPLE_ID)
1700 result += sizeof(u64);
1702 if (type & PERF_SAMPLE_STREAM_ID)
1703 result += sizeof(u64);
1705 if (type & PERF_SAMPLE_CPU)
1706 result += sizeof(u64);
1708 if (type & PERF_SAMPLE_PERIOD)
1709 result += sizeof(u64);
1711 if (type & PERF_SAMPLE_READ) {
1712 result += sizeof(u64);
1713 if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED)
1714 result += sizeof(u64);
1715 if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING)
1716 result += sizeof(u64);
1717 /* PERF_FORMAT_ID is forced for PERF_SAMPLE_READ */
1718 if (read_format & PERF_FORMAT_GROUP) {
1719 sz = sample->read.group.nr *
1720 sizeof(struct sample_read_value);
1723 result += sizeof(u64);
1727 if (type & PERF_SAMPLE_CALLCHAIN) {
1728 sz = (sample->callchain->nr + 1) * sizeof(u64);
1732 if (type & PERF_SAMPLE_RAW) {
1733 result += sizeof(u32);
1734 result += sample->raw_size;
1737 if (type & PERF_SAMPLE_BRANCH_STACK) {
1738 sz = sample->branch_stack->nr * sizeof(struct branch_entry);
1743 if (type & PERF_SAMPLE_REGS_USER) {
1744 if (sample->user_regs.abi) {
1745 result += sizeof(u64);
1746 sz = hweight_long(sample->user_regs.mask) * sizeof(u64);
1749 result += sizeof(u64);
1753 if (type & PERF_SAMPLE_STACK_USER) {
1754 sz = sample->user_stack.size;
1755 result += sizeof(u64);
1758 result += sizeof(u64);
1762 if (type & PERF_SAMPLE_WEIGHT)
1763 result += sizeof(u64);
1765 if (type & PERF_SAMPLE_DATA_SRC)
1766 result += sizeof(u64);
1768 if (type & PERF_SAMPLE_TRANSACTION)
1769 result += sizeof(u64);
1771 if (type & PERF_SAMPLE_REGS_INTR) {
1772 if (sample->intr_regs.abi) {
1773 result += sizeof(u64);
1774 sz = hweight_long(sample->intr_regs.mask) * sizeof(u64);
1777 result += sizeof(u64);
1784 int perf_event__synthesize_sample(union perf_event *event, u64 type,
1786 const struct perf_sample *sample,
1792 * used for cross-endian analysis. See git commit 65014ab3
1793 * for why this goofiness is needed.
1797 array = event->sample.array;
1799 if (type & PERF_SAMPLE_IDENTIFIER) {
1800 *array = sample->id;
1804 if (type & PERF_SAMPLE_IP) {
1805 *array = sample->ip;
1809 if (type & PERF_SAMPLE_TID) {
1810 u.val32[0] = sample->pid;
1811 u.val32[1] = sample->tid;
1814 * Inverse of what is done in perf_evsel__parse_sample
1816 u.val32[0] = bswap_32(u.val32[0]);
1817 u.val32[1] = bswap_32(u.val32[1]);
1818 u.val64 = bswap_64(u.val64);
1825 if (type & PERF_SAMPLE_TIME) {
1826 *array = sample->time;
1830 if (type & PERF_SAMPLE_ADDR) {
1831 *array = sample->addr;
1835 if (type & PERF_SAMPLE_ID) {
1836 *array = sample->id;
1840 if (type & PERF_SAMPLE_STREAM_ID) {
1841 *array = sample->stream_id;
1845 if (type & PERF_SAMPLE_CPU) {
1846 u.val32[0] = sample->cpu;
1849 * Inverse of what is done in perf_evsel__parse_sample
1851 u.val32[0] = bswap_32(u.val32[0]);
1852 u.val64 = bswap_64(u.val64);
1858 if (type & PERF_SAMPLE_PERIOD) {
1859 *array = sample->period;
1863 if (type & PERF_SAMPLE_READ) {
1864 if (read_format & PERF_FORMAT_GROUP)
1865 *array = sample->read.group.nr;
1867 *array = sample->read.one.value;
1870 if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED) {
1871 *array = sample->read.time_enabled;
1875 if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING) {
1876 *array = sample->read.time_running;
1880 /* PERF_FORMAT_ID is forced for PERF_SAMPLE_READ */
1881 if (read_format & PERF_FORMAT_GROUP) {
1882 sz = sample->read.group.nr *
1883 sizeof(struct sample_read_value);
1884 memcpy(array, sample->read.group.values, sz);
1885 array = (void *)array + sz;
1887 *array = sample->read.one.id;
1892 if (type & PERF_SAMPLE_CALLCHAIN) {
1893 sz = (sample->callchain->nr + 1) * sizeof(u64);
1894 memcpy(array, sample->callchain, sz);
1895 array = (void *)array + sz;
1898 if (type & PERF_SAMPLE_RAW) {
1899 u.val32[0] = sample->raw_size;
1900 if (WARN_ONCE(swapped,
1901 "Endianness of raw data not corrected!\n")) {
1903 * Inverse of what is done in perf_evsel__parse_sample
1905 u.val32[0] = bswap_32(u.val32[0]);
1906 u.val32[1] = bswap_32(u.val32[1]);
1907 u.val64 = bswap_64(u.val64);
1910 array = (void *)array + sizeof(u32);
1912 memcpy(array, sample->raw_data, sample->raw_size);
1913 array = (void *)array + sample->raw_size;
1916 if (type & PERF_SAMPLE_BRANCH_STACK) {
1917 sz = sample->branch_stack->nr * sizeof(struct branch_entry);
1919 memcpy(array, sample->branch_stack, sz);
1920 array = (void *)array + sz;
1923 if (type & PERF_SAMPLE_REGS_USER) {
1924 if (sample->user_regs.abi) {
1925 *array++ = sample->user_regs.abi;
1926 sz = hweight_long(sample->user_regs.mask) * sizeof(u64);
1927 memcpy(array, sample->user_regs.regs, sz);
1928 array = (void *)array + sz;
1934 if (type & PERF_SAMPLE_STACK_USER) {
1935 sz = sample->user_stack.size;
1938 memcpy(array, sample->user_stack.data, sz);
1939 array = (void *)array + sz;
1944 if (type & PERF_SAMPLE_WEIGHT) {
1945 *array = sample->weight;
1949 if (type & PERF_SAMPLE_DATA_SRC) {
1950 *array = sample->data_src;
1954 if (type & PERF_SAMPLE_TRANSACTION) {
1955 *array = sample->transaction;
1959 if (type & PERF_SAMPLE_REGS_INTR) {
1960 if (sample->intr_regs.abi) {
1961 *array++ = sample->intr_regs.abi;
1962 sz = hweight_long(sample->intr_regs.mask) * sizeof(u64);
1963 memcpy(array, sample->intr_regs.regs, sz);
1964 array = (void *)array + sz;
1973 struct format_field *perf_evsel__field(struct perf_evsel *evsel, const char *name)
1975 return pevent_find_field(evsel->tp_format, name);
1978 void *perf_evsel__rawptr(struct perf_evsel *evsel, struct perf_sample *sample,
1981 struct format_field *field = perf_evsel__field(evsel, name);
1987 offset = field->offset;
1989 if (field->flags & FIELD_IS_DYNAMIC) {
1990 offset = *(int *)(sample->raw_data + field->offset);
1994 return sample->raw_data + offset;
1997 u64 perf_evsel__intval(struct perf_evsel *evsel, struct perf_sample *sample,
2000 struct format_field *field = perf_evsel__field(evsel, name);
2007 ptr = sample->raw_data + field->offset;
2009 switch (field->size) {
2013 value = *(u16 *)ptr;
2016 value = *(u32 *)ptr;
2019 memcpy(&value, ptr, sizeof(u64));
2025 if (!evsel->needs_swap)
2028 switch (field->size) {
2030 return bswap_16(value);
2032 return bswap_32(value);
2034 return bswap_64(value);
2042 static int comma_fprintf(FILE *fp, bool *first, const char *fmt, ...)
2048 ret += fprintf(fp, ",");
2050 ret += fprintf(fp, ":");
2054 va_start(args, fmt);
2055 ret += vfprintf(fp, fmt, args);
2060 static int __print_attr__fprintf(FILE *fp, const char *name, const char *val, void *priv)
2062 return comma_fprintf(fp, (bool *)priv, " %s: %s", name, val);
2065 int perf_evsel__fprintf(struct perf_evsel *evsel,
2066 struct perf_attr_details *details, FILE *fp)
2071 if (details->event_group) {
2072 struct perf_evsel *pos;
2074 if (!perf_evsel__is_group_leader(evsel))
2077 if (evsel->nr_members > 1)
2078 printed += fprintf(fp, "%s{", evsel->group_name ?: "");
2080 printed += fprintf(fp, "%s", perf_evsel__name(evsel));
2081 for_each_group_member(pos, evsel)
2082 printed += fprintf(fp, ",%s", perf_evsel__name(pos));
2084 if (evsel->nr_members > 1)
2085 printed += fprintf(fp, "}");
2089 printed += fprintf(fp, "%s", perf_evsel__name(evsel));
2091 if (details->verbose) {
2092 printed += perf_event_attr__fprintf(fp, &evsel->attr,
2093 __print_attr__fprintf, &first);
2094 } else if (details->freq) {
2095 printed += comma_fprintf(fp, &first, " sample_freq=%" PRIu64,
2096 (u64)evsel->attr.sample_freq);
2103 bool perf_evsel__fallback(struct perf_evsel *evsel, int err,
2104 char *msg, size_t msgsize)
2106 if ((err == ENOENT || err == ENXIO || err == ENODEV) &&
2107 evsel->attr.type == PERF_TYPE_HARDWARE &&
2108 evsel->attr.config == PERF_COUNT_HW_CPU_CYCLES) {
2110 * If it's cycles then fall back to hrtimer based
2111 * cpu-clock-tick sw counter, which is always available even if
2114 * PPC returns ENXIO until 2.6.37 (behavior changed with commit
2117 scnprintf(msg, msgsize, "%s",
2118 "The cycles event is not supported, trying to fall back to cpu-clock-ticks");
2120 evsel->attr.type = PERF_TYPE_SOFTWARE;
2121 evsel->attr.config = PERF_COUNT_SW_CPU_CLOCK;
2123 zfree(&evsel->name);
2130 int perf_evsel__open_strerror(struct perf_evsel *evsel, struct target *target,
2131 int err, char *msg, size_t size)
2133 char sbuf[STRERR_BUFSIZE];
2138 return scnprintf(msg, size,
2139 "You may not have permission to collect %sstats.\n"
2140 "Consider tweaking /proc/sys/kernel/perf_event_paranoid:\n"
2141 " -1 - Not paranoid at all\n"
2142 " 0 - Disallow raw tracepoint access for unpriv\n"
2143 " 1 - Disallow cpu events for unpriv\n"
2144 " 2 - Disallow kernel profiling for unpriv",
2145 target->system_wide ? "system-wide " : "");
2147 return scnprintf(msg, size, "The %s event is not supported.",
2148 perf_evsel__name(evsel));
2150 return scnprintf(msg, size, "%s",
2151 "Too many events are opened.\n"
2152 "Try again after reducing the number of events.");
2154 if (target->cpu_list)
2155 return scnprintf(msg, size, "%s",
2156 "No such device - did you specify an out-of-range profile CPU?\n");
2159 if (evsel->attr.precise_ip)
2160 return scnprintf(msg, size, "%s",
2161 "\'precise\' request may not be supported. Try removing 'p' modifier.");
2162 #if defined(__i386__) || defined(__x86_64__)
2163 if (evsel->attr.type == PERF_TYPE_HARDWARE)
2164 return scnprintf(msg, size, "%s",
2165 "No hardware sampling interrupt available.\n"
2166 "No APIC? If so then you can boot the kernel with the \"lapic\" boot parameter to force-enable it.");
2170 if (find_process("oprofiled"))
2171 return scnprintf(msg, size,
2172 "The PMU counters are busy/taken by another profiler.\n"
2173 "We found oprofile daemon running, please stop it and try again.");
2176 if (perf_missing_features.clockid)
2177 return scnprintf(msg, size, "clockid feature not supported.");
2178 if (perf_missing_features.clockid_wrong)
2179 return scnprintf(msg, size, "wrong clockid (%d).", clockid);
2185 return scnprintf(msg, size,
2186 "The sys_perf_event_open() syscall returned with %d (%s) for event (%s).\n"
2187 "/bin/dmesg may provide additional information.\n"
2188 "No CONFIG_PERF_EVENTS=y kernel support configured?\n",
2189 err, strerror_r(err, sbuf, sizeof(sbuf)),
2190 perf_evsel__name(evsel));