1 // SPDX-License-Identifier: GPL-2.0-only
3 * Copyright (C) 2011, Red Hat Inc, Arnaldo Carvalho de Melo <acme@redhat.com>
5 * Parts came from builtin-{top,stat,record}.c, see those files for further
12 #include <linux/bitops.h>
13 #include <api/fs/fs.h>
14 #include <api/fs/tracing_path.h>
15 #include <traceevent/event-parse.h>
16 #include <linux/hw_breakpoint.h>
17 #include <linux/perf_event.h>
18 #include <linux/compiler.h>
19 #include <linux/err.h>
20 #include <linux/zalloc.h>
21 #include <sys/ioctl.h>
22 #include <sys/resource.h>
23 #include <sys/types.h>
26 #include <perf/evsel.h>
28 #include "callchain.h"
35 #include "thread_map.h"
37 #include "perf_regs.h"
40 #include "trace-event.h"
45 #include "../perf-sys.h"
46 #include "util/parse-branch-options.h"
47 #include <internal/xyarray.h>
49 #include <linux/ctype.h>
51 struct perf_missing_features perf_missing_features;
53 static clockid_t clockid;
55 static int perf_evsel__no_extra_init(struct evsel *evsel __maybe_unused)
60 void __weak test_attr__ready(void) { }
62 static void perf_evsel__no_extra_fini(struct evsel *evsel __maybe_unused)
68 int (*init)(struct evsel *evsel);
69 void (*fini)(struct evsel *evsel);
70 } perf_evsel__object = {
71 .size = sizeof(struct evsel),
72 .init = perf_evsel__no_extra_init,
73 .fini = perf_evsel__no_extra_fini,
76 int perf_evsel__object_config(size_t object_size,
77 int (*init)(struct evsel *evsel),
78 void (*fini)(struct evsel *evsel))
84 if (perf_evsel__object.size > object_size)
87 perf_evsel__object.size = object_size;
91 perf_evsel__object.init = init;
94 perf_evsel__object.fini = fini;
99 #define FD(e, x, y) (*(int *)xyarray__entry(e->core.fd, x, y))
101 int __perf_evsel__sample_size(u64 sample_type)
103 u64 mask = sample_type & PERF_SAMPLE_MASK;
107 for (i = 0; i < 64; i++) {
108 if (mask & (1ULL << i))
118 * __perf_evsel__calc_id_pos - calculate id_pos.
119 * @sample_type: sample type
121 * This function returns the position of the event id (PERF_SAMPLE_ID or
122 * PERF_SAMPLE_IDENTIFIER) in a sample event i.e. in the array of struct
123 * perf_record_sample.
125 static int __perf_evsel__calc_id_pos(u64 sample_type)
129 if (sample_type & PERF_SAMPLE_IDENTIFIER)
132 if (!(sample_type & PERF_SAMPLE_ID))
135 if (sample_type & PERF_SAMPLE_IP)
138 if (sample_type & PERF_SAMPLE_TID)
141 if (sample_type & PERF_SAMPLE_TIME)
144 if (sample_type & PERF_SAMPLE_ADDR)
151 * __perf_evsel__calc_is_pos - calculate is_pos.
152 * @sample_type: sample type
154 * This function returns the position (counting backwards) of the event id
155 * (PERF_SAMPLE_ID or PERF_SAMPLE_IDENTIFIER) in a non-sample event i.e. if
156 * sample_id_all is used there is an id sample appended to non-sample events.
158 static int __perf_evsel__calc_is_pos(u64 sample_type)
162 if (sample_type & PERF_SAMPLE_IDENTIFIER)
165 if (!(sample_type & PERF_SAMPLE_ID))
168 if (sample_type & PERF_SAMPLE_CPU)
171 if (sample_type & PERF_SAMPLE_STREAM_ID)
177 void perf_evsel__calc_id_pos(struct evsel *evsel)
179 evsel->id_pos = __perf_evsel__calc_id_pos(evsel->core.attr.sample_type);
180 evsel->is_pos = __perf_evsel__calc_is_pos(evsel->core.attr.sample_type);
183 void __perf_evsel__set_sample_bit(struct evsel *evsel,
184 enum perf_event_sample_format bit)
186 if (!(evsel->core.attr.sample_type & bit)) {
187 evsel->core.attr.sample_type |= bit;
188 evsel->sample_size += sizeof(u64);
189 perf_evsel__calc_id_pos(evsel);
193 void __perf_evsel__reset_sample_bit(struct evsel *evsel,
194 enum perf_event_sample_format bit)
196 if (evsel->core.attr.sample_type & bit) {
197 evsel->core.attr.sample_type &= ~bit;
198 evsel->sample_size -= sizeof(u64);
199 perf_evsel__calc_id_pos(evsel);
203 void perf_evsel__set_sample_id(struct evsel *evsel,
204 bool can_sample_identifier)
206 if (can_sample_identifier) {
207 perf_evsel__reset_sample_bit(evsel, ID);
208 perf_evsel__set_sample_bit(evsel, IDENTIFIER);
210 perf_evsel__set_sample_bit(evsel, ID);
212 evsel->core.attr.read_format |= PERF_FORMAT_ID;
216 * perf_evsel__is_function_event - Return whether given evsel is a function
219 * @evsel - evsel selector to be tested
221 * Return %true if event is function trace event
223 bool perf_evsel__is_function_event(struct evsel *evsel)
225 #define FUNCTION_EVENT "ftrace:function"
227 return evsel->name &&
228 !strncmp(FUNCTION_EVENT, evsel->name, sizeof(FUNCTION_EVENT));
230 #undef FUNCTION_EVENT
233 void evsel__init(struct evsel *evsel,
234 struct perf_event_attr *attr, int idx)
236 perf_evsel__init(&evsel->core, attr);
238 evsel->tracking = !idx;
239 evsel->leader = evsel;
242 evsel->max_events = ULONG_MAX;
243 evsel->evlist = NULL;
244 evsel->bpf_obj = NULL;
246 INIT_LIST_HEAD(&evsel->config_terms);
247 perf_evsel__object.init(evsel);
248 evsel->sample_size = __perf_evsel__sample_size(attr->sample_type);
249 perf_evsel__calc_id_pos(evsel);
250 evsel->cmdline_group_boundary = false;
251 evsel->metric_expr = NULL;
252 evsel->metric_name = NULL;
253 evsel->metric_events = NULL;
254 evsel->collect_stat = false;
255 evsel->pmu_name = NULL;
258 struct evsel *perf_evsel__new_idx(struct perf_event_attr *attr, int idx)
260 struct evsel *evsel = zalloc(perf_evsel__object.size);
264 evsel__init(evsel, attr, idx);
266 if (perf_evsel__is_bpf_output(evsel)) {
267 evsel->core.attr.sample_type |= (PERF_SAMPLE_RAW | PERF_SAMPLE_TIME |
268 PERF_SAMPLE_CPU | PERF_SAMPLE_PERIOD),
269 evsel->core.attr.sample_period = 1;
272 if (perf_evsel__is_clock(evsel)) {
274 * The evsel->unit points to static alias->unit
275 * so it's ok to use static string in here.
277 static const char *unit = "msec";
286 static bool perf_event_can_profile_kernel(void)
288 return perf_event_paranoid_check(1);
291 struct evsel *perf_evsel__new_cycles(bool precise)
293 struct perf_event_attr attr = {
294 .type = PERF_TYPE_HARDWARE,
295 .config = PERF_COUNT_HW_CPU_CYCLES,
296 .exclude_kernel = !perf_event_can_profile_kernel(),
300 event_attr_init(&attr);
306 * Now let the usual logic to set up the perf_event_attr defaults
307 * to kick in when we return and before perf_evsel__open() is called.
310 evsel = evsel__new(&attr);
314 evsel->precise_max = true;
316 /* use asprintf() because free(evsel) assumes name is allocated */
317 if (asprintf(&evsel->name, "cycles%s%s%.*s",
318 (attr.precise_ip || attr.exclude_kernel) ? ":" : "",
319 attr.exclude_kernel ? "u" : "",
320 attr.precise_ip ? attr.precise_ip + 1 : 0, "ppp") < 0)
325 evsel__delete(evsel);
331 * Returns pointer with encoded error via <linux/err.h> interface.
333 struct evsel *perf_evsel__newtp_idx(const char *sys, const char *name, int idx)
335 struct evsel *evsel = zalloc(perf_evsel__object.size);
341 struct perf_event_attr attr = {
342 .type = PERF_TYPE_TRACEPOINT,
343 .sample_type = (PERF_SAMPLE_RAW | PERF_SAMPLE_TIME |
344 PERF_SAMPLE_CPU | PERF_SAMPLE_PERIOD),
347 if (asprintf(&evsel->name, "%s:%s", sys, name) < 0)
350 evsel->tp_format = trace_event__tp_format(sys, name);
351 if (IS_ERR(evsel->tp_format)) {
352 err = PTR_ERR(evsel->tp_format);
356 event_attr_init(&attr);
357 attr.config = evsel->tp_format->id;
358 attr.sample_period = 1;
359 evsel__init(evsel, &attr, idx);
371 const char *perf_evsel__hw_names[PERF_COUNT_HW_MAX] = {
379 "stalled-cycles-frontend",
380 "stalled-cycles-backend",
384 static const char *__perf_evsel__hw_name(u64 config)
386 if (config < PERF_COUNT_HW_MAX && perf_evsel__hw_names[config])
387 return perf_evsel__hw_names[config];
389 return "unknown-hardware";
392 static int perf_evsel__add_modifiers(struct evsel *evsel, char *bf, size_t size)
394 int colon = 0, r = 0;
395 struct perf_event_attr *attr = &evsel->core.attr;
396 bool exclude_guest_default = false;
398 #define MOD_PRINT(context, mod) do { \
399 if (!attr->exclude_##context) { \
400 if (!colon) colon = ++r; \
401 r += scnprintf(bf + r, size - r, "%c", mod); \
404 if (attr->exclude_kernel || attr->exclude_user || attr->exclude_hv) {
405 MOD_PRINT(kernel, 'k');
406 MOD_PRINT(user, 'u');
408 exclude_guest_default = true;
411 if (attr->precise_ip) {
414 r += scnprintf(bf + r, size - r, "%.*s", attr->precise_ip, "ppp");
415 exclude_guest_default = true;
418 if (attr->exclude_host || attr->exclude_guest == exclude_guest_default) {
419 MOD_PRINT(host, 'H');
420 MOD_PRINT(guest, 'G');
428 static int perf_evsel__hw_name(struct evsel *evsel, char *bf, size_t size)
430 int r = scnprintf(bf, size, "%s", __perf_evsel__hw_name(evsel->core.attr.config));
431 return r + perf_evsel__add_modifiers(evsel, bf + r, size - r);
434 const char *perf_evsel__sw_names[PERF_COUNT_SW_MAX] = {
447 static const char *__perf_evsel__sw_name(u64 config)
449 if (config < PERF_COUNT_SW_MAX && perf_evsel__sw_names[config])
450 return perf_evsel__sw_names[config];
451 return "unknown-software";
454 static int perf_evsel__sw_name(struct evsel *evsel, char *bf, size_t size)
456 int r = scnprintf(bf, size, "%s", __perf_evsel__sw_name(evsel->core.attr.config));
457 return r + perf_evsel__add_modifiers(evsel, bf + r, size - r);
460 static int __perf_evsel__bp_name(char *bf, size_t size, u64 addr, u64 type)
464 r = scnprintf(bf, size, "mem:0x%" PRIx64 ":", addr);
466 if (type & HW_BREAKPOINT_R)
467 r += scnprintf(bf + r, size - r, "r");
469 if (type & HW_BREAKPOINT_W)
470 r += scnprintf(bf + r, size - r, "w");
472 if (type & HW_BREAKPOINT_X)
473 r += scnprintf(bf + r, size - r, "x");
478 static int perf_evsel__bp_name(struct evsel *evsel, char *bf, size_t size)
480 struct perf_event_attr *attr = &evsel->core.attr;
481 int r = __perf_evsel__bp_name(bf, size, attr->bp_addr, attr->bp_type);
482 return r + perf_evsel__add_modifiers(evsel, bf + r, size - r);
485 const char *perf_evsel__hw_cache[PERF_COUNT_HW_CACHE_MAX]
486 [PERF_EVSEL__MAX_ALIASES] = {
487 { "L1-dcache", "l1-d", "l1d", "L1-data", },
488 { "L1-icache", "l1-i", "l1i", "L1-instruction", },
490 { "dTLB", "d-tlb", "Data-TLB", },
491 { "iTLB", "i-tlb", "Instruction-TLB", },
492 { "branch", "branches", "bpu", "btb", "bpc", },
496 const char *perf_evsel__hw_cache_op[PERF_COUNT_HW_CACHE_OP_MAX]
497 [PERF_EVSEL__MAX_ALIASES] = {
498 { "load", "loads", "read", },
499 { "store", "stores", "write", },
500 { "prefetch", "prefetches", "speculative-read", "speculative-load", },
503 const char *perf_evsel__hw_cache_result[PERF_COUNT_HW_CACHE_RESULT_MAX]
504 [PERF_EVSEL__MAX_ALIASES] = {
505 { "refs", "Reference", "ops", "access", },
506 { "misses", "miss", },
509 #define C(x) PERF_COUNT_HW_CACHE_##x
510 #define CACHE_READ (1 << C(OP_READ))
511 #define CACHE_WRITE (1 << C(OP_WRITE))
512 #define CACHE_PREFETCH (1 << C(OP_PREFETCH))
513 #define COP(x) (1 << x)
516 * cache operartion stat
517 * L1I : Read and prefetch only
518 * ITLB and BPU : Read-only
520 static unsigned long perf_evsel__hw_cache_stat[C(MAX)] = {
521 [C(L1D)] = (CACHE_READ | CACHE_WRITE | CACHE_PREFETCH),
522 [C(L1I)] = (CACHE_READ | CACHE_PREFETCH),
523 [C(LL)] = (CACHE_READ | CACHE_WRITE | CACHE_PREFETCH),
524 [C(DTLB)] = (CACHE_READ | CACHE_WRITE | CACHE_PREFETCH),
525 [C(ITLB)] = (CACHE_READ),
526 [C(BPU)] = (CACHE_READ),
527 [C(NODE)] = (CACHE_READ | CACHE_WRITE | CACHE_PREFETCH),
530 bool perf_evsel__is_cache_op_valid(u8 type, u8 op)
532 if (perf_evsel__hw_cache_stat[type] & COP(op))
533 return true; /* valid */
535 return false; /* invalid */
538 int __perf_evsel__hw_cache_type_op_res_name(u8 type, u8 op, u8 result,
539 char *bf, size_t size)
542 return scnprintf(bf, size, "%s-%s-%s", perf_evsel__hw_cache[type][0],
543 perf_evsel__hw_cache_op[op][0],
544 perf_evsel__hw_cache_result[result][0]);
547 return scnprintf(bf, size, "%s-%s", perf_evsel__hw_cache[type][0],
548 perf_evsel__hw_cache_op[op][1]);
551 static int __perf_evsel__hw_cache_name(u64 config, char *bf, size_t size)
553 u8 op, result, type = (config >> 0) & 0xff;
554 const char *err = "unknown-ext-hardware-cache-type";
556 if (type >= PERF_COUNT_HW_CACHE_MAX)
559 op = (config >> 8) & 0xff;
560 err = "unknown-ext-hardware-cache-op";
561 if (op >= PERF_COUNT_HW_CACHE_OP_MAX)
564 result = (config >> 16) & 0xff;
565 err = "unknown-ext-hardware-cache-result";
566 if (result >= PERF_COUNT_HW_CACHE_RESULT_MAX)
569 err = "invalid-cache";
570 if (!perf_evsel__is_cache_op_valid(type, op))
573 return __perf_evsel__hw_cache_type_op_res_name(type, op, result, bf, size);
575 return scnprintf(bf, size, "%s", err);
578 static int perf_evsel__hw_cache_name(struct evsel *evsel, char *bf, size_t size)
580 int ret = __perf_evsel__hw_cache_name(evsel->core.attr.config, bf, size);
581 return ret + perf_evsel__add_modifiers(evsel, bf + ret, size - ret);
584 static int perf_evsel__raw_name(struct evsel *evsel, char *bf, size_t size)
586 int ret = scnprintf(bf, size, "raw 0x%" PRIx64, evsel->core.attr.config);
587 return ret + perf_evsel__add_modifiers(evsel, bf + ret, size - ret);
590 static int perf_evsel__tool_name(char *bf, size_t size)
592 int ret = scnprintf(bf, size, "duration_time");
596 const char *perf_evsel__name(struct evsel *evsel)
606 switch (evsel->core.attr.type) {
608 perf_evsel__raw_name(evsel, bf, sizeof(bf));
611 case PERF_TYPE_HARDWARE:
612 perf_evsel__hw_name(evsel, bf, sizeof(bf));
615 case PERF_TYPE_HW_CACHE:
616 perf_evsel__hw_cache_name(evsel, bf, sizeof(bf));
619 case PERF_TYPE_SOFTWARE:
620 if (evsel->tool_event)
621 perf_evsel__tool_name(bf, sizeof(bf));
623 perf_evsel__sw_name(evsel, bf, sizeof(bf));
626 case PERF_TYPE_TRACEPOINT:
627 scnprintf(bf, sizeof(bf), "%s", "unknown tracepoint");
630 case PERF_TYPE_BREAKPOINT:
631 perf_evsel__bp_name(evsel, bf, sizeof(bf));
635 scnprintf(bf, sizeof(bf), "unknown attr type: %d",
636 evsel->core.attr.type);
640 evsel->name = strdup(bf);
648 const char *perf_evsel__group_name(struct evsel *evsel)
650 return evsel->group_name ?: "anon group";
654 * Returns the group details for the specified leader,
655 * with following rules.
657 * For record -e '{cycles,instructions}'
658 * 'anon group { cycles:u, instructions:u }'
660 * For record -e 'cycles,instructions' and report --group
661 * 'cycles:u, instructions:u'
663 int perf_evsel__group_desc(struct evsel *evsel, char *buf, size_t size)
667 const char *group_name = perf_evsel__group_name(evsel);
669 if (!evsel->forced_leader)
670 ret = scnprintf(buf, size, "%s { ", group_name);
672 ret += scnprintf(buf + ret, size - ret, "%s",
673 perf_evsel__name(evsel));
675 for_each_group_member(pos, evsel)
676 ret += scnprintf(buf + ret, size - ret, ", %s",
677 perf_evsel__name(pos));
679 if (!evsel->forced_leader)
680 ret += scnprintf(buf + ret, size - ret, " }");
685 static void __perf_evsel__config_callchain(struct evsel *evsel,
686 struct record_opts *opts,
687 struct callchain_param *param)
689 bool function = perf_evsel__is_function_event(evsel);
690 struct perf_event_attr *attr = &evsel->core.attr;
692 perf_evsel__set_sample_bit(evsel, CALLCHAIN);
694 attr->sample_max_stack = param->max_stack;
696 if (opts->kernel_callchains)
697 attr->exclude_callchain_user = 1;
698 if (opts->user_callchains)
699 attr->exclude_callchain_kernel = 1;
700 if (param->record_mode == CALLCHAIN_LBR) {
701 if (!opts->branch_stack) {
702 if (attr->exclude_user) {
703 pr_warning("LBR callstack option is only available "
704 "to get user callchain information. "
705 "Falling back to framepointers.\n");
707 perf_evsel__set_sample_bit(evsel, BRANCH_STACK);
708 attr->branch_sample_type = PERF_SAMPLE_BRANCH_USER |
709 PERF_SAMPLE_BRANCH_CALL_STACK |
710 PERF_SAMPLE_BRANCH_NO_CYCLES |
711 PERF_SAMPLE_BRANCH_NO_FLAGS;
714 pr_warning("Cannot use LBR callstack with branch stack. "
715 "Falling back to framepointers.\n");
718 if (param->record_mode == CALLCHAIN_DWARF) {
720 perf_evsel__set_sample_bit(evsel, REGS_USER);
721 perf_evsel__set_sample_bit(evsel, STACK_USER);
722 if (opts->sample_user_regs && DWARF_MINIMAL_REGS != PERF_REGS_MASK) {
723 attr->sample_regs_user |= DWARF_MINIMAL_REGS;
724 pr_warning("WARNING: The use of --call-graph=dwarf may require all the user registers, "
725 "specifying a subset with --user-regs may render DWARF unwinding unreliable, "
726 "so the minimal registers set (IP, SP) is explicitly forced.\n");
728 attr->sample_regs_user |= PERF_REGS_MASK;
730 attr->sample_stack_user = param->dump_size;
731 attr->exclude_callchain_user = 1;
733 pr_info("Cannot use DWARF unwind for function trace event,"
734 " falling back to framepointers.\n");
739 pr_info("Disabling user space callchains for function trace event.\n");
740 attr->exclude_callchain_user = 1;
744 void perf_evsel__config_callchain(struct evsel *evsel,
745 struct record_opts *opts,
746 struct callchain_param *param)
749 return __perf_evsel__config_callchain(evsel, opts, param);
753 perf_evsel__reset_callgraph(struct evsel *evsel,
754 struct callchain_param *param)
756 struct perf_event_attr *attr = &evsel->core.attr;
758 perf_evsel__reset_sample_bit(evsel, CALLCHAIN);
759 if (param->record_mode == CALLCHAIN_LBR) {
760 perf_evsel__reset_sample_bit(evsel, BRANCH_STACK);
761 attr->branch_sample_type &= ~(PERF_SAMPLE_BRANCH_USER |
762 PERF_SAMPLE_BRANCH_CALL_STACK);
764 if (param->record_mode == CALLCHAIN_DWARF) {
765 perf_evsel__reset_sample_bit(evsel, REGS_USER);
766 perf_evsel__reset_sample_bit(evsel, STACK_USER);
770 static void apply_config_terms(struct evsel *evsel,
771 struct record_opts *opts, bool track)
773 struct perf_evsel_config_term *term;
774 struct list_head *config_terms = &evsel->config_terms;
775 struct perf_event_attr *attr = &evsel->core.attr;
776 /* callgraph default */
777 struct callchain_param param = {
778 .record_mode = callchain_param.record_mode,
782 const char *callgraph_buf = NULL;
784 list_for_each_entry(term, config_terms, list) {
785 switch (term->type) {
786 case PERF_EVSEL__CONFIG_TERM_PERIOD:
787 if (!(term->weak && opts->user_interval != ULLONG_MAX)) {
788 attr->sample_period = term->val.period;
790 perf_evsel__reset_sample_bit(evsel, PERIOD);
793 case PERF_EVSEL__CONFIG_TERM_FREQ:
794 if (!(term->weak && opts->user_freq != UINT_MAX)) {
795 attr->sample_freq = term->val.freq;
797 perf_evsel__set_sample_bit(evsel, PERIOD);
800 case PERF_EVSEL__CONFIG_TERM_TIME:
802 perf_evsel__set_sample_bit(evsel, TIME);
804 perf_evsel__reset_sample_bit(evsel, TIME);
806 case PERF_EVSEL__CONFIG_TERM_CALLGRAPH:
807 callgraph_buf = term->val.callgraph;
809 case PERF_EVSEL__CONFIG_TERM_BRANCH:
810 if (term->val.branch && strcmp(term->val.branch, "no")) {
811 perf_evsel__set_sample_bit(evsel, BRANCH_STACK);
812 parse_branch_str(term->val.branch,
813 &attr->branch_sample_type);
815 perf_evsel__reset_sample_bit(evsel, BRANCH_STACK);
817 case PERF_EVSEL__CONFIG_TERM_STACK_USER:
818 dump_size = term->val.stack_user;
820 case PERF_EVSEL__CONFIG_TERM_MAX_STACK:
821 max_stack = term->val.max_stack;
823 case PERF_EVSEL__CONFIG_TERM_MAX_EVENTS:
824 evsel->max_events = term->val.max_events;
826 case PERF_EVSEL__CONFIG_TERM_INHERIT:
828 * attr->inherit should has already been set by
829 * perf_evsel__config. If user explicitly set
830 * inherit using config terms, override global
831 * opt->no_inherit setting.
833 attr->inherit = term->val.inherit ? 1 : 0;
835 case PERF_EVSEL__CONFIG_TERM_OVERWRITE:
836 attr->write_backward = term->val.overwrite ? 1 : 0;
838 case PERF_EVSEL__CONFIG_TERM_DRV_CFG:
840 case PERF_EVSEL__CONFIG_TERM_PERCORE:
842 case PERF_EVSEL__CONFIG_TERM_AUX_OUTPUT:
843 attr->aux_output = term->val.aux_output ? 1 : 0;
850 /* User explicitly set per-event callgraph, clear the old setting and reset. */
851 if ((callgraph_buf != NULL) || (dump_size > 0) || max_stack) {
852 bool sample_address = false;
855 param.max_stack = max_stack;
856 if (callgraph_buf == NULL)
857 callgraph_buf = "fp";
860 /* parse callgraph parameters */
861 if (callgraph_buf != NULL) {
862 if (!strcmp(callgraph_buf, "no")) {
863 param.enabled = false;
864 param.record_mode = CALLCHAIN_NONE;
866 param.enabled = true;
867 if (parse_callchain_record(callgraph_buf, ¶m)) {
868 pr_err("per-event callgraph setting for %s failed. "
869 "Apply callgraph global setting for it\n",
873 if (param.record_mode == CALLCHAIN_DWARF)
874 sample_address = true;
878 dump_size = round_up(dump_size, sizeof(u64));
879 param.dump_size = dump_size;
882 /* If global callgraph set, clear it */
883 if (callchain_param.enabled)
884 perf_evsel__reset_callgraph(evsel, &callchain_param);
886 /* set perf-event callgraph */
888 if (sample_address) {
889 perf_evsel__set_sample_bit(evsel, ADDR);
890 perf_evsel__set_sample_bit(evsel, DATA_SRC);
891 evsel->core.attr.mmap_data = track;
893 perf_evsel__config_callchain(evsel, opts, ¶m);
898 static bool is_dummy_event(struct evsel *evsel)
900 return (evsel->core.attr.type == PERF_TYPE_SOFTWARE) &&
901 (evsel->core.attr.config == PERF_COUNT_SW_DUMMY);
905 * The enable_on_exec/disabled value strategy:
907 * 1) For any type of traced program:
908 * - all independent events and group leaders are disabled
909 * - all group members are enabled
911 * Group members are ruled by group leaders. They need to
912 * be enabled, because the group scheduling relies on that.
914 * 2) For traced programs executed by perf:
915 * - all independent events and group leaders have
917 * - we don't specifically enable or disable any event during
920 * Independent events and group leaders are initially disabled
921 * and get enabled by exec. Group members are ruled by group
922 * leaders as stated in 1).
924 * 3) For traced programs attached by perf (pid/tid):
925 * - we specifically enable or disable all events during
928 * When attaching events to already running traced we
929 * enable/disable events specifically, as there's no
930 * initial traced exec call.
932 void perf_evsel__config(struct evsel *evsel, struct record_opts *opts,
933 struct callchain_param *callchain)
935 struct evsel *leader = evsel->leader;
936 struct perf_event_attr *attr = &evsel->core.attr;
937 int track = evsel->tracking;
938 bool per_cpu = opts->target.default_per_cpu && !opts->target.per_thread;
940 attr->sample_id_all = perf_missing_features.sample_id_all ? 0 : 1;
941 attr->inherit = !opts->no_inherit;
942 attr->write_backward = opts->overwrite ? 1 : 0;
944 perf_evsel__set_sample_bit(evsel, IP);
945 perf_evsel__set_sample_bit(evsel, TID);
947 if (evsel->sample_read) {
948 perf_evsel__set_sample_bit(evsel, READ);
951 * We need ID even in case of single event, because
952 * PERF_SAMPLE_READ process ID specific data.
954 perf_evsel__set_sample_id(evsel, false);
957 * Apply group format only if we belong to group
958 * with more than one members.
960 if (leader->core.nr_members > 1) {
961 attr->read_format |= PERF_FORMAT_GROUP;
967 * We default some events to have a default interval. But keep
968 * it a weak assumption overridable by the user.
970 if (!attr->sample_period || (opts->user_freq != UINT_MAX ||
971 opts->user_interval != ULLONG_MAX)) {
973 perf_evsel__set_sample_bit(evsel, PERIOD);
975 attr->sample_freq = opts->freq;
977 attr->sample_period = opts->default_interval;
982 * Disable sampling for all group members other
983 * than leader in case leader 'leads' the sampling.
985 if ((leader != evsel) && leader->sample_read) {
987 attr->sample_freq = 0;
988 attr->sample_period = 0;
989 attr->write_backward = 0;
992 * We don't get sample for slave events, we make them
993 * when delivering group leader sample. Set the slave
994 * event to follow the master sample_type to ease up
997 attr->sample_type = leader->core.attr.sample_type;
1000 if (opts->no_samples)
1001 attr->sample_freq = 0;
1003 if (opts->inherit_stat) {
1004 evsel->core.attr.read_format |=
1005 PERF_FORMAT_TOTAL_TIME_ENABLED |
1006 PERF_FORMAT_TOTAL_TIME_RUNNING |
1008 attr->inherit_stat = 1;
1011 if (opts->sample_address) {
1012 perf_evsel__set_sample_bit(evsel, ADDR);
1013 attr->mmap_data = track;
1017 * We don't allow user space callchains for function trace
1018 * event, due to issues with page faults while tracing page
1019 * fault handler and its overall trickiness nature.
1021 if (perf_evsel__is_function_event(evsel))
1022 evsel->core.attr.exclude_callchain_user = 1;
1024 if (callchain && callchain->enabled && !evsel->no_aux_samples)
1025 perf_evsel__config_callchain(evsel, opts, callchain);
1027 if (opts->sample_intr_regs) {
1028 attr->sample_regs_intr = opts->sample_intr_regs;
1029 perf_evsel__set_sample_bit(evsel, REGS_INTR);
1032 if (opts->sample_user_regs) {
1033 attr->sample_regs_user |= opts->sample_user_regs;
1034 perf_evsel__set_sample_bit(evsel, REGS_USER);
1037 if (target__has_cpu(&opts->target) || opts->sample_cpu)
1038 perf_evsel__set_sample_bit(evsel, CPU);
1041 * When the user explicitly disabled time don't force it here.
1043 if (opts->sample_time &&
1044 (!perf_missing_features.sample_id_all &&
1045 (!opts->no_inherit || target__has_cpu(&opts->target) || per_cpu ||
1046 opts->sample_time_set)))
1047 perf_evsel__set_sample_bit(evsel, TIME);
1049 if (opts->raw_samples && !evsel->no_aux_samples) {
1050 perf_evsel__set_sample_bit(evsel, TIME);
1051 perf_evsel__set_sample_bit(evsel, RAW);
1052 perf_evsel__set_sample_bit(evsel, CPU);
1055 if (opts->sample_address)
1056 perf_evsel__set_sample_bit(evsel, DATA_SRC);
1058 if (opts->sample_phys_addr)
1059 perf_evsel__set_sample_bit(evsel, PHYS_ADDR);
1061 if (opts->no_buffering) {
1062 attr->watermark = 0;
1063 attr->wakeup_events = 1;
1065 if (opts->branch_stack && !evsel->no_aux_samples) {
1066 perf_evsel__set_sample_bit(evsel, BRANCH_STACK);
1067 attr->branch_sample_type = opts->branch_stack;
1070 if (opts->sample_weight)
1071 perf_evsel__set_sample_bit(evsel, WEIGHT);
1075 attr->mmap2 = track && !perf_missing_features.mmap2;
1077 attr->ksymbol = track && !perf_missing_features.ksymbol;
1078 attr->bpf_event = track && !opts->no_bpf_event && !perf_missing_features.bpf;
1080 if (opts->record_namespaces)
1081 attr->namespaces = track;
1083 if (opts->record_switch_events)
1084 attr->context_switch = track;
1086 if (opts->sample_transaction)
1087 perf_evsel__set_sample_bit(evsel, TRANSACTION);
1089 if (opts->running_time) {
1090 evsel->core.attr.read_format |=
1091 PERF_FORMAT_TOTAL_TIME_ENABLED |
1092 PERF_FORMAT_TOTAL_TIME_RUNNING;
1096 * XXX see the function comment above
1098 * Disabling only independent events or group leaders,
1099 * keeping group members enabled.
1101 if (perf_evsel__is_group_leader(evsel))
1105 * Setting enable_on_exec for independent events and
1106 * group leaders for traced executed by perf.
1108 if (target__none(&opts->target) && perf_evsel__is_group_leader(evsel) &&
1109 !opts->initial_delay)
1110 attr->enable_on_exec = 1;
1112 if (evsel->immediate) {
1114 attr->enable_on_exec = 0;
1117 clockid = opts->clockid;
1118 if (opts->use_clockid) {
1119 attr->use_clockid = 1;
1120 attr->clockid = opts->clockid;
1123 if (evsel->precise_max)
1124 attr->precise_ip = 3;
1126 if (opts->all_user) {
1127 attr->exclude_kernel = 1;
1128 attr->exclude_user = 0;
1131 if (opts->all_kernel) {
1132 attr->exclude_kernel = 0;
1133 attr->exclude_user = 1;
1136 if (evsel->core.own_cpus || evsel->unit)
1137 evsel->core.attr.read_format |= PERF_FORMAT_ID;
1140 * Apply event specific term settings,
1141 * it overloads any global configuration.
1143 apply_config_terms(evsel, opts, track);
1145 evsel->ignore_missing_thread = opts->ignore_missing_thread;
1147 /* The --period option takes the precedence. */
1148 if (opts->period_set) {
1150 perf_evsel__set_sample_bit(evsel, PERIOD);
1152 perf_evsel__reset_sample_bit(evsel, PERIOD);
1156 * For initial_delay, a dummy event is added implicitly.
1157 * The software event will trigger -EOPNOTSUPP error out,
1158 * if BRANCH_STACK bit is set.
1160 if (opts->initial_delay && is_dummy_event(evsel))
1161 perf_evsel__reset_sample_bit(evsel, BRANCH_STACK);
1164 int perf_evsel__set_filter(struct evsel *evsel, const char *filter)
1166 char *new_filter = strdup(filter);
1168 if (new_filter != NULL) {
1169 free(evsel->filter);
1170 evsel->filter = new_filter;
1177 static int perf_evsel__append_filter(struct evsel *evsel,
1178 const char *fmt, const char *filter)
1182 if (evsel->filter == NULL)
1183 return perf_evsel__set_filter(evsel, filter);
1185 if (asprintf(&new_filter, fmt, evsel->filter, filter) > 0) {
1186 free(evsel->filter);
1187 evsel->filter = new_filter;
1194 int perf_evsel__append_tp_filter(struct evsel *evsel, const char *filter)
1196 return perf_evsel__append_filter(evsel, "(%s) && (%s)", filter);
1199 int perf_evsel__append_addr_filter(struct evsel *evsel, const char *filter)
1201 return perf_evsel__append_filter(evsel, "%s,%s", filter);
1204 int evsel__enable(struct evsel *evsel)
1206 int err = perf_evsel__enable(&evsel->core);
1209 evsel->disabled = false;
1214 int evsel__disable(struct evsel *evsel)
1216 int err = perf_evsel__disable(&evsel->core);
1218 * We mark it disabled here so that tools that disable a event can
1219 * ignore events after they disable it. I.e. the ring buffer may have
1220 * already a few more events queued up before the kernel got the stop
1224 evsel->disabled = true;
1229 int perf_evsel__alloc_id(struct evsel *evsel, int ncpus, int nthreads)
1231 if (ncpus == 0 || nthreads == 0)
1234 if (evsel->system_wide)
1237 evsel->sample_id = xyarray__new(ncpus, nthreads, sizeof(struct perf_sample_id));
1238 if (evsel->sample_id == NULL)
1241 evsel->id = zalloc(ncpus * nthreads * sizeof(u64));
1242 if (evsel->id == NULL) {
1243 xyarray__delete(evsel->sample_id);
1244 evsel->sample_id = NULL;
1251 static void perf_evsel__free_id(struct evsel *evsel)
1253 xyarray__delete(evsel->sample_id);
1254 evsel->sample_id = NULL;
1259 static void perf_evsel__free_config_terms(struct evsel *evsel)
1261 struct perf_evsel_config_term *term, *h;
1263 list_for_each_entry_safe(term, h, &evsel->config_terms, list) {
1264 list_del_init(&term->list);
1269 void perf_evsel__exit(struct evsel *evsel)
1271 assert(list_empty(&evsel->core.node));
1272 assert(evsel->evlist == NULL);
1273 perf_evsel__free_counts(evsel);
1274 perf_evsel__free_fd(&evsel->core);
1275 perf_evsel__free_id(evsel);
1276 perf_evsel__free_config_terms(evsel);
1277 cgroup__put(evsel->cgrp);
1278 perf_cpu_map__put(evsel->core.cpus);
1279 perf_cpu_map__put(evsel->core.own_cpus);
1280 perf_thread_map__put(evsel->core.threads);
1281 zfree(&evsel->group_name);
1282 zfree(&evsel->name);
1283 perf_evsel__object.fini(evsel);
1286 void evsel__delete(struct evsel *evsel)
1288 perf_evsel__exit(evsel);
1292 void perf_evsel__compute_deltas(struct evsel *evsel, int cpu, int thread,
1293 struct perf_counts_values *count)
1295 struct perf_counts_values tmp;
1297 if (!evsel->prev_raw_counts)
1301 tmp = evsel->prev_raw_counts->aggr;
1302 evsel->prev_raw_counts->aggr = *count;
1304 tmp = *perf_counts(evsel->prev_raw_counts, cpu, thread);
1305 *perf_counts(evsel->prev_raw_counts, cpu, thread) = *count;
1308 count->val = count->val - tmp.val;
1309 count->ena = count->ena - tmp.ena;
1310 count->run = count->run - tmp.run;
1313 void perf_counts_values__scale(struct perf_counts_values *count,
1314 bool scale, s8 *pscaled)
1319 if (count->run == 0) {
1322 } else if (count->run < count->ena) {
1324 count->val = (u64)((double) count->val * count->ena / count->run);
1333 perf_evsel__read_one(struct evsel *evsel, int cpu, int thread)
1335 struct perf_counts_values *count = perf_counts(evsel->counts, cpu, thread);
1337 return perf_evsel__read(&evsel->core, cpu, thread, count);
1341 perf_evsel__set_count(struct evsel *counter, int cpu, int thread,
1342 u64 val, u64 ena, u64 run)
1344 struct perf_counts_values *count;
1346 count = perf_counts(counter->counts, cpu, thread);
1352 perf_counts__set_loaded(counter->counts, cpu, thread, true);
1356 perf_evsel__process_group_data(struct evsel *leader,
1357 int cpu, int thread, u64 *data)
1359 u64 read_format = leader->core.attr.read_format;
1360 struct sample_read_value *v;
1361 u64 nr, ena = 0, run = 0, i;
1365 if (nr != (u64) leader->core.nr_members)
1368 if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED)
1371 if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING)
1374 v = (struct sample_read_value *) data;
1376 perf_evsel__set_count(leader, cpu, thread,
1377 v[0].value, ena, run);
1379 for (i = 1; i < nr; i++) {
1380 struct evsel *counter;
1382 counter = perf_evlist__id2evsel(leader->evlist, v[i].id);
1386 perf_evsel__set_count(counter, cpu, thread,
1387 v[i].value, ena, run);
1394 perf_evsel__read_group(struct evsel *leader, int cpu, int thread)
1396 struct perf_stat_evsel *ps = leader->stats;
1397 u64 read_format = leader->core.attr.read_format;
1398 int size = perf_evsel__read_size(&leader->core);
1399 u64 *data = ps->group_data;
1401 if (!(read_format & PERF_FORMAT_ID))
1404 if (!perf_evsel__is_group_leader(leader))
1408 data = zalloc(size);
1412 ps->group_data = data;
1415 if (FD(leader, cpu, thread) < 0)
1418 if (readn(FD(leader, cpu, thread), data, size) <= 0)
1421 return perf_evsel__process_group_data(leader, cpu, thread, data);
1424 int perf_evsel__read_counter(struct evsel *evsel, int cpu, int thread)
1426 u64 read_format = evsel->core.attr.read_format;
1428 if (read_format & PERF_FORMAT_GROUP)
1429 return perf_evsel__read_group(evsel, cpu, thread);
1431 return perf_evsel__read_one(evsel, cpu, thread);
1434 int __perf_evsel__read_on_cpu(struct evsel *evsel,
1435 int cpu, int thread, bool scale)
1437 struct perf_counts_values count;
1438 size_t nv = scale ? 3 : 1;
1440 if (FD(evsel, cpu, thread) < 0)
1443 if (evsel->counts == NULL && perf_evsel__alloc_counts(evsel, cpu + 1, thread + 1) < 0)
1446 if (readn(FD(evsel, cpu, thread), &count, nv * sizeof(u64)) <= 0)
1449 perf_evsel__compute_deltas(evsel, cpu, thread, &count);
1450 perf_counts_values__scale(&count, scale, NULL);
1451 *perf_counts(evsel->counts, cpu, thread) = count;
1455 static int get_group_fd(struct evsel *evsel, int cpu, int thread)
1457 struct evsel *leader = evsel->leader;
1460 if (perf_evsel__is_group_leader(evsel))
1464 * Leader must be already processed/open,
1465 * if not it's a bug.
1467 BUG_ON(!leader->core.fd);
1469 fd = FD(leader, cpu, thread);
1480 static void __p_bits(char *buf, size_t size, u64 value, struct bit_names *bits)
1482 bool first_bit = true;
1486 if (value & bits[i].bit) {
1487 buf += scnprintf(buf, size, "%s%s", first_bit ? "" : "|", bits[i].name);
1490 } while (bits[++i].name != NULL);
1493 static void __p_sample_type(char *buf, size_t size, u64 value)
1495 #define bit_name(n) { PERF_SAMPLE_##n, #n }
1496 struct bit_names bits[] = {
1497 bit_name(IP), bit_name(TID), bit_name(TIME), bit_name(ADDR),
1498 bit_name(READ), bit_name(CALLCHAIN), bit_name(ID), bit_name(CPU),
1499 bit_name(PERIOD), bit_name(STREAM_ID), bit_name(RAW),
1500 bit_name(BRANCH_STACK), bit_name(REGS_USER), bit_name(STACK_USER),
1501 bit_name(IDENTIFIER), bit_name(REGS_INTR), bit_name(DATA_SRC),
1502 bit_name(WEIGHT), bit_name(PHYS_ADDR),
1506 __p_bits(buf, size, value, bits);
1509 static void __p_branch_sample_type(char *buf, size_t size, u64 value)
1511 #define bit_name(n) { PERF_SAMPLE_BRANCH_##n, #n }
1512 struct bit_names bits[] = {
1513 bit_name(USER), bit_name(KERNEL), bit_name(HV), bit_name(ANY),
1514 bit_name(ANY_CALL), bit_name(ANY_RETURN), bit_name(IND_CALL),
1515 bit_name(ABORT_TX), bit_name(IN_TX), bit_name(NO_TX),
1516 bit_name(COND), bit_name(CALL_STACK), bit_name(IND_JUMP),
1517 bit_name(CALL), bit_name(NO_FLAGS), bit_name(NO_CYCLES),
1521 __p_bits(buf, size, value, bits);
1524 static void __p_read_format(char *buf, size_t size, u64 value)
1526 #define bit_name(n) { PERF_FORMAT_##n, #n }
1527 struct bit_names bits[] = {
1528 bit_name(TOTAL_TIME_ENABLED), bit_name(TOTAL_TIME_RUNNING),
1529 bit_name(ID), bit_name(GROUP),
1533 __p_bits(buf, size, value, bits);
1536 #define BUF_SIZE 1024
1538 #define p_hex(val) snprintf(buf, BUF_SIZE, "%#"PRIx64, (uint64_t)(val))
1539 #define p_unsigned(val) snprintf(buf, BUF_SIZE, "%"PRIu64, (uint64_t)(val))
1540 #define p_signed(val) snprintf(buf, BUF_SIZE, "%"PRId64, (int64_t)(val))
1541 #define p_sample_type(val) __p_sample_type(buf, BUF_SIZE, val)
1542 #define p_branch_sample_type(val) __p_branch_sample_type(buf, BUF_SIZE, val)
1543 #define p_read_format(val) __p_read_format(buf, BUF_SIZE, val)
1545 #define PRINT_ATTRn(_n, _f, _p) \
1549 ret += attr__fprintf(fp, _n, buf, priv);\
1553 #define PRINT_ATTRf(_f, _p) PRINT_ATTRn(#_f, _f, _p)
1555 int perf_event_attr__fprintf(FILE *fp, struct perf_event_attr *attr,
1556 attr__fprintf_f attr__fprintf, void *priv)
1561 PRINT_ATTRf(type, p_unsigned);
1562 PRINT_ATTRf(size, p_unsigned);
1563 PRINT_ATTRf(config, p_hex);
1564 PRINT_ATTRn("{ sample_period, sample_freq }", sample_period, p_unsigned);
1565 PRINT_ATTRf(sample_type, p_sample_type);
1566 PRINT_ATTRf(read_format, p_read_format);
1568 PRINT_ATTRf(disabled, p_unsigned);
1569 PRINT_ATTRf(inherit, p_unsigned);
1570 PRINT_ATTRf(pinned, p_unsigned);
1571 PRINT_ATTRf(exclusive, p_unsigned);
1572 PRINT_ATTRf(exclude_user, p_unsigned);
1573 PRINT_ATTRf(exclude_kernel, p_unsigned);
1574 PRINT_ATTRf(exclude_hv, p_unsigned);
1575 PRINT_ATTRf(exclude_idle, p_unsigned);
1576 PRINT_ATTRf(mmap, p_unsigned);
1577 PRINT_ATTRf(comm, p_unsigned);
1578 PRINT_ATTRf(freq, p_unsigned);
1579 PRINT_ATTRf(inherit_stat, p_unsigned);
1580 PRINT_ATTRf(enable_on_exec, p_unsigned);
1581 PRINT_ATTRf(task, p_unsigned);
1582 PRINT_ATTRf(watermark, p_unsigned);
1583 PRINT_ATTRf(precise_ip, p_unsigned);
1584 PRINT_ATTRf(mmap_data, p_unsigned);
1585 PRINT_ATTRf(sample_id_all, p_unsigned);
1586 PRINT_ATTRf(exclude_host, p_unsigned);
1587 PRINT_ATTRf(exclude_guest, p_unsigned);
1588 PRINT_ATTRf(exclude_callchain_kernel, p_unsigned);
1589 PRINT_ATTRf(exclude_callchain_user, p_unsigned);
1590 PRINT_ATTRf(mmap2, p_unsigned);
1591 PRINT_ATTRf(comm_exec, p_unsigned);
1592 PRINT_ATTRf(use_clockid, p_unsigned);
1593 PRINT_ATTRf(context_switch, p_unsigned);
1594 PRINT_ATTRf(write_backward, p_unsigned);
1595 PRINT_ATTRf(namespaces, p_unsigned);
1596 PRINT_ATTRf(ksymbol, p_unsigned);
1597 PRINT_ATTRf(bpf_event, p_unsigned);
1598 PRINT_ATTRf(aux_output, p_unsigned);
1600 PRINT_ATTRn("{ wakeup_events, wakeup_watermark }", wakeup_events, p_unsigned);
1601 PRINT_ATTRf(bp_type, p_unsigned);
1602 PRINT_ATTRn("{ bp_addr, config1 }", bp_addr, p_hex);
1603 PRINT_ATTRn("{ bp_len, config2 }", bp_len, p_hex);
1604 PRINT_ATTRf(branch_sample_type, p_branch_sample_type);
1605 PRINT_ATTRf(sample_regs_user, p_hex);
1606 PRINT_ATTRf(sample_stack_user, p_unsigned);
1607 PRINT_ATTRf(clockid, p_signed);
1608 PRINT_ATTRf(sample_regs_intr, p_hex);
1609 PRINT_ATTRf(aux_watermark, p_unsigned);
1610 PRINT_ATTRf(sample_max_stack, p_unsigned);
1615 static int __open_attr__fprintf(FILE *fp, const char *name, const char *val,
1616 void *priv __maybe_unused)
1618 return fprintf(fp, " %-32s %s\n", name, val);
1621 static void perf_evsel__remove_fd(struct evsel *pos,
1622 int nr_cpus, int nr_threads,
1625 for (int cpu = 0; cpu < nr_cpus; cpu++)
1626 for (int thread = thread_idx; thread < nr_threads - 1; thread++)
1627 FD(pos, cpu, thread) = FD(pos, cpu, thread + 1);
1630 static int update_fds(struct evsel *evsel,
1631 int nr_cpus, int cpu_idx,
1632 int nr_threads, int thread_idx)
1636 if (cpu_idx >= nr_cpus || thread_idx >= nr_threads)
1639 evlist__for_each_entry(evsel->evlist, pos) {
1640 nr_cpus = pos != evsel ? nr_cpus : cpu_idx;
1642 perf_evsel__remove_fd(pos, nr_cpus, nr_threads, thread_idx);
1645 * Since fds for next evsel has not been created,
1646 * there is no need to iterate whole event list.
1654 static bool ignore_missing_thread(struct evsel *evsel,
1655 int nr_cpus, int cpu,
1656 struct perf_thread_map *threads,
1657 int thread, int err)
1659 pid_t ignore_pid = perf_thread_map__pid(threads, thread);
1661 if (!evsel->ignore_missing_thread)
1664 /* The system wide setup does not work with threads. */
1665 if (evsel->system_wide)
1668 /* The -ESRCH is perf event syscall errno for pid's not found. */
1672 /* If there's only one thread, let it fail. */
1673 if (threads->nr == 1)
1677 * We should remove fd for missing_thread first
1678 * because thread_map__remove() will decrease threads->nr.
1680 if (update_fds(evsel, nr_cpus, cpu, threads->nr, thread))
1683 if (thread_map__remove(threads, thread))
1686 pr_warning("WARNING: Ignored open failure for pid %d\n",
1691 static void display_attr(struct perf_event_attr *attr)
1694 fprintf(stderr, "%.60s\n", graph_dotted_line);
1695 fprintf(stderr, "perf_event_attr:\n");
1696 perf_event_attr__fprintf(stderr, attr, __open_attr__fprintf, NULL);
1697 fprintf(stderr, "%.60s\n", graph_dotted_line);
1701 static int perf_event_open(struct evsel *evsel,
1702 pid_t pid, int cpu, int group_fd,
1703 unsigned long flags)
1705 int precise_ip = evsel->core.attr.precise_ip;
1709 pr_debug2("sys_perf_event_open: pid %d cpu %d group_fd %d flags %#lx",
1710 pid, cpu, group_fd, flags);
1712 fd = sys_perf_event_open(&evsel->core.attr, pid, cpu, group_fd, flags);
1716 /* Do not try less precise if not requested. */
1717 if (!evsel->precise_max)
1721 * We tried all the precise_ip values, and it's
1722 * still failing, so leave it to standard fallback.
1724 if (!evsel->core.attr.precise_ip) {
1725 evsel->core.attr.precise_ip = precise_ip;
1729 pr_debug2("\nsys_perf_event_open failed, error %d\n", -ENOTSUP);
1730 evsel->core.attr.precise_ip--;
1731 pr_debug2("decreasing precise_ip by one (%d)\n", evsel->core.attr.precise_ip);
1732 display_attr(&evsel->core.attr);
1738 int evsel__open(struct evsel *evsel, struct perf_cpu_map *cpus,
1739 struct perf_thread_map *threads)
1741 int cpu, thread, nthreads;
1742 unsigned long flags = PERF_FLAG_FD_CLOEXEC;
1744 enum { NO_CHANGE, SET_TO_MAX, INCREASED_MAX } set_rlimit = NO_CHANGE;
1746 if ((perf_missing_features.write_backward && evsel->core.attr.write_backward) ||
1747 (perf_missing_features.aux_output && evsel->core.attr.aux_output))
1751 static struct perf_cpu_map *empty_cpu_map;
1753 if (empty_cpu_map == NULL) {
1754 empty_cpu_map = perf_cpu_map__dummy_new();
1755 if (empty_cpu_map == NULL)
1759 cpus = empty_cpu_map;
1762 if (threads == NULL) {
1763 static struct perf_thread_map *empty_thread_map;
1765 if (empty_thread_map == NULL) {
1766 empty_thread_map = thread_map__new_by_tid(-1);
1767 if (empty_thread_map == NULL)
1771 threads = empty_thread_map;
1774 if (evsel->system_wide)
1777 nthreads = threads->nr;
1779 if (evsel->core.fd == NULL &&
1780 perf_evsel__alloc_fd(&evsel->core, cpus->nr, nthreads) < 0)
1784 flags |= PERF_FLAG_PID_CGROUP;
1785 pid = evsel->cgrp->fd;
1788 fallback_missing_features:
1789 if (perf_missing_features.clockid_wrong)
1790 evsel->core.attr.clockid = CLOCK_MONOTONIC; /* should always work */
1791 if (perf_missing_features.clockid) {
1792 evsel->core.attr.use_clockid = 0;
1793 evsel->core.attr.clockid = 0;
1795 if (perf_missing_features.cloexec)
1796 flags &= ~(unsigned long)PERF_FLAG_FD_CLOEXEC;
1797 if (perf_missing_features.mmap2)
1798 evsel->core.attr.mmap2 = 0;
1799 if (perf_missing_features.exclude_guest)
1800 evsel->core.attr.exclude_guest = evsel->core.attr.exclude_host = 0;
1801 if (perf_missing_features.lbr_flags)
1802 evsel->core.attr.branch_sample_type &= ~(PERF_SAMPLE_BRANCH_NO_FLAGS |
1803 PERF_SAMPLE_BRANCH_NO_CYCLES);
1804 if (perf_missing_features.group_read && evsel->core.attr.inherit)
1805 evsel->core.attr.read_format &= ~(PERF_FORMAT_GROUP|PERF_FORMAT_ID);
1806 if (perf_missing_features.ksymbol)
1807 evsel->core.attr.ksymbol = 0;
1808 if (perf_missing_features.bpf)
1809 evsel->core.attr.bpf_event = 0;
1811 if (perf_missing_features.sample_id_all)
1812 evsel->core.attr.sample_id_all = 0;
1814 display_attr(&evsel->core.attr);
1816 for (cpu = 0; cpu < cpus->nr; cpu++) {
1818 for (thread = 0; thread < nthreads; thread++) {
1821 if (!evsel->cgrp && !evsel->system_wide)
1822 pid = perf_thread_map__pid(threads, thread);
1824 group_fd = get_group_fd(evsel, cpu, thread);
1828 fd = perf_event_open(evsel, pid, cpus->map[cpu],
1831 FD(evsel, cpu, thread) = fd;
1836 if (ignore_missing_thread(evsel, cpus->nr, cpu, threads, thread, err)) {
1838 * We just removed 1 thread, so take a step
1839 * back on thread index and lower the upper
1845 /* ... and pretend like nothing have happened. */
1850 pr_debug2("\nsys_perf_event_open failed, error %d\n",
1855 pr_debug2(" = %d\n", fd);
1857 if (evsel->bpf_fd >= 0) {
1859 int bpf_fd = evsel->bpf_fd;
1862 PERF_EVENT_IOC_SET_BPF,
1864 if (err && errno != EEXIST) {
1865 pr_err("failed to attach bpf fd %d: %s\n",
1866 bpf_fd, strerror(errno));
1872 set_rlimit = NO_CHANGE;
1875 * If we succeeded but had to kill clockid, fail and
1876 * have perf_evsel__open_strerror() print us a nice
1879 if (perf_missing_features.clockid ||
1880 perf_missing_features.clockid_wrong) {
1891 * perf stat needs between 5 and 22 fds per CPU. When we run out
1892 * of them try to increase the limits.
1894 if (err == -EMFILE && set_rlimit < INCREASED_MAX) {
1896 int old_errno = errno;
1898 if (getrlimit(RLIMIT_NOFILE, &l) == 0) {
1899 if (set_rlimit == NO_CHANGE)
1900 l.rlim_cur = l.rlim_max;
1902 l.rlim_cur = l.rlim_max + 1000;
1903 l.rlim_max = l.rlim_cur;
1905 if (setrlimit(RLIMIT_NOFILE, &l) == 0) {
1914 if (err != -EINVAL || cpu > 0 || thread > 0)
1918 * Must probe features in the order they were added to the
1919 * perf_event_attr interface.
1921 if (!perf_missing_features.aux_output && evsel->core.attr.aux_output) {
1922 perf_missing_features.aux_output = true;
1923 pr_debug2("Kernel has no attr.aux_output support, bailing out\n");
1925 } else if (!perf_missing_features.bpf && evsel->core.attr.bpf_event) {
1926 perf_missing_features.bpf = true;
1927 pr_debug2("switching off bpf_event\n");
1928 goto fallback_missing_features;
1929 } else if (!perf_missing_features.ksymbol && evsel->core.attr.ksymbol) {
1930 perf_missing_features.ksymbol = true;
1931 pr_debug2("switching off ksymbol\n");
1932 goto fallback_missing_features;
1933 } else if (!perf_missing_features.write_backward && evsel->core.attr.write_backward) {
1934 perf_missing_features.write_backward = true;
1935 pr_debug2("switching off write_backward\n");
1937 } else if (!perf_missing_features.clockid_wrong && evsel->core.attr.use_clockid) {
1938 perf_missing_features.clockid_wrong = true;
1939 pr_debug2("switching off clockid\n");
1940 goto fallback_missing_features;
1941 } else if (!perf_missing_features.clockid && evsel->core.attr.use_clockid) {
1942 perf_missing_features.clockid = true;
1943 pr_debug2("switching off use_clockid\n");
1944 goto fallback_missing_features;
1945 } else if (!perf_missing_features.cloexec && (flags & PERF_FLAG_FD_CLOEXEC)) {
1946 perf_missing_features.cloexec = true;
1947 pr_debug2("switching off cloexec flag\n");
1948 goto fallback_missing_features;
1949 } else if (!perf_missing_features.mmap2 && evsel->core.attr.mmap2) {
1950 perf_missing_features.mmap2 = true;
1951 pr_debug2("switching off mmap2\n");
1952 goto fallback_missing_features;
1953 } else if (!perf_missing_features.exclude_guest &&
1954 (evsel->core.attr.exclude_guest || evsel->core.attr.exclude_host)) {
1955 perf_missing_features.exclude_guest = true;
1956 pr_debug2("switching off exclude_guest, exclude_host\n");
1957 goto fallback_missing_features;
1958 } else if (!perf_missing_features.sample_id_all) {
1959 perf_missing_features.sample_id_all = true;
1960 pr_debug2("switching off sample_id_all\n");
1961 goto retry_sample_id;
1962 } else if (!perf_missing_features.lbr_flags &&
1963 (evsel->core.attr.branch_sample_type &
1964 (PERF_SAMPLE_BRANCH_NO_CYCLES |
1965 PERF_SAMPLE_BRANCH_NO_FLAGS))) {
1966 perf_missing_features.lbr_flags = true;
1967 pr_debug2("switching off branch sample type no (cycles/flags)\n");
1968 goto fallback_missing_features;
1969 } else if (!perf_missing_features.group_read &&
1970 evsel->core.attr.inherit &&
1971 (evsel->core.attr.read_format & PERF_FORMAT_GROUP) &&
1972 perf_evsel__is_group_leader(evsel)) {
1973 perf_missing_features.group_read = true;
1974 pr_debug2("switching off group read\n");
1975 goto fallback_missing_features;
1979 threads->err_thread = thread;
1982 while (--thread >= 0) {
1983 close(FD(evsel, cpu, thread));
1984 FD(evsel, cpu, thread) = -1;
1987 } while (--cpu >= 0);
1991 void evsel__close(struct evsel *evsel)
1993 perf_evsel__close(&evsel->core);
1994 perf_evsel__free_id(evsel);
1997 int perf_evsel__open_per_cpu(struct evsel *evsel,
1998 struct perf_cpu_map *cpus)
2000 return evsel__open(evsel, cpus, NULL);
2003 int perf_evsel__open_per_thread(struct evsel *evsel,
2004 struct perf_thread_map *threads)
2006 return evsel__open(evsel, NULL, threads);
2009 static int perf_evsel__parse_id_sample(const struct evsel *evsel,
2010 const union perf_event *event,
2011 struct perf_sample *sample)
2013 u64 type = evsel->core.attr.sample_type;
2014 const __u64 *array = event->sample.array;
2015 bool swapped = evsel->needs_swap;
2018 array += ((event->header.size -
2019 sizeof(event->header)) / sizeof(u64)) - 1;
2021 if (type & PERF_SAMPLE_IDENTIFIER) {
2022 sample->id = *array;
2026 if (type & PERF_SAMPLE_CPU) {
2029 /* undo swap of u64, then swap on individual u32s */
2030 u.val64 = bswap_64(u.val64);
2031 u.val32[0] = bswap_32(u.val32[0]);
2034 sample->cpu = u.val32[0];
2038 if (type & PERF_SAMPLE_STREAM_ID) {
2039 sample->stream_id = *array;
2043 if (type & PERF_SAMPLE_ID) {
2044 sample->id = *array;
2048 if (type & PERF_SAMPLE_TIME) {
2049 sample->time = *array;
2053 if (type & PERF_SAMPLE_TID) {
2056 /* undo swap of u64, then swap on individual u32s */
2057 u.val64 = bswap_64(u.val64);
2058 u.val32[0] = bswap_32(u.val32[0]);
2059 u.val32[1] = bswap_32(u.val32[1]);
2062 sample->pid = u.val32[0];
2063 sample->tid = u.val32[1];
2070 static inline bool overflow(const void *endp, u16 max_size, const void *offset,
2073 return size > max_size || offset + size > endp;
2076 #define OVERFLOW_CHECK(offset, size, max_size) \
2078 if (overflow(endp, (max_size), (offset), (size))) \
2082 #define OVERFLOW_CHECK_u64(offset) \
2083 OVERFLOW_CHECK(offset, sizeof(u64), sizeof(u64))
2086 perf_event__check_size(union perf_event *event, unsigned int sample_size)
2089 * The evsel's sample_size is based on PERF_SAMPLE_MASK which includes
2090 * up to PERF_SAMPLE_PERIOD. After that overflow() must be used to
2091 * check the format does not go past the end of the event.
2093 if (sample_size + sizeof(event->header) > event->header.size)
2099 int perf_evsel__parse_sample(struct evsel *evsel, union perf_event *event,
2100 struct perf_sample *data)
2102 u64 type = evsel->core.attr.sample_type;
2103 bool swapped = evsel->needs_swap;
2105 u16 max_size = event->header.size;
2106 const void *endp = (void *)event + max_size;
2110 * used for cross-endian analysis. See git commit 65014ab3
2111 * for why this goofiness is needed.
2115 memset(data, 0, sizeof(*data));
2116 data->cpu = data->pid = data->tid = -1;
2117 data->stream_id = data->id = data->time = -1ULL;
2118 data->period = evsel->core.attr.sample_period;
2119 data->cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK;
2120 data->misc = event->header.misc;
2122 data->data_src = PERF_MEM_DATA_SRC_NONE;
2124 if (event->header.type != PERF_RECORD_SAMPLE) {
2125 if (!evsel->core.attr.sample_id_all)
2127 return perf_evsel__parse_id_sample(evsel, event, data);
2130 array = event->sample.array;
2132 if (perf_event__check_size(event, evsel->sample_size))
2135 if (type & PERF_SAMPLE_IDENTIFIER) {
2140 if (type & PERF_SAMPLE_IP) {
2145 if (type & PERF_SAMPLE_TID) {
2148 /* undo swap of u64, then swap on individual u32s */
2149 u.val64 = bswap_64(u.val64);
2150 u.val32[0] = bswap_32(u.val32[0]);
2151 u.val32[1] = bswap_32(u.val32[1]);
2154 data->pid = u.val32[0];
2155 data->tid = u.val32[1];
2159 if (type & PERF_SAMPLE_TIME) {
2160 data->time = *array;
2164 if (type & PERF_SAMPLE_ADDR) {
2165 data->addr = *array;
2169 if (type & PERF_SAMPLE_ID) {
2174 if (type & PERF_SAMPLE_STREAM_ID) {
2175 data->stream_id = *array;
2179 if (type & PERF_SAMPLE_CPU) {
2183 /* undo swap of u64, then swap on individual u32s */
2184 u.val64 = bswap_64(u.val64);
2185 u.val32[0] = bswap_32(u.val32[0]);
2188 data->cpu = u.val32[0];
2192 if (type & PERF_SAMPLE_PERIOD) {
2193 data->period = *array;
2197 if (type & PERF_SAMPLE_READ) {
2198 u64 read_format = evsel->core.attr.read_format;
2200 OVERFLOW_CHECK_u64(array);
2201 if (read_format & PERF_FORMAT_GROUP)
2202 data->read.group.nr = *array;
2204 data->read.one.value = *array;
2208 if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED) {
2209 OVERFLOW_CHECK_u64(array);
2210 data->read.time_enabled = *array;
2214 if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING) {
2215 OVERFLOW_CHECK_u64(array);
2216 data->read.time_running = *array;
2220 /* PERF_FORMAT_ID is forced for PERF_SAMPLE_READ */
2221 if (read_format & PERF_FORMAT_GROUP) {
2222 const u64 max_group_nr = UINT64_MAX /
2223 sizeof(struct sample_read_value);
2225 if (data->read.group.nr > max_group_nr)
2227 sz = data->read.group.nr *
2228 sizeof(struct sample_read_value);
2229 OVERFLOW_CHECK(array, sz, max_size);
2230 data->read.group.values =
2231 (struct sample_read_value *)array;
2232 array = (void *)array + sz;
2234 OVERFLOW_CHECK_u64(array);
2235 data->read.one.id = *array;
2240 if (evsel__has_callchain(evsel)) {
2241 const u64 max_callchain_nr = UINT64_MAX / sizeof(u64);
2243 OVERFLOW_CHECK_u64(array);
2244 data->callchain = (struct ip_callchain *)array++;
2245 if (data->callchain->nr > max_callchain_nr)
2247 sz = data->callchain->nr * sizeof(u64);
2248 OVERFLOW_CHECK(array, sz, max_size);
2249 array = (void *)array + sz;
2252 if (type & PERF_SAMPLE_RAW) {
2253 OVERFLOW_CHECK_u64(array);
2257 * Undo swap of u64, then swap on individual u32s,
2258 * get the size of the raw area and undo all of the
2259 * swap. The pevent interface handles endianity by
2263 u.val64 = bswap_64(u.val64);
2264 u.val32[0] = bswap_32(u.val32[0]);
2265 u.val32[1] = bswap_32(u.val32[1]);
2267 data->raw_size = u.val32[0];
2270 * The raw data is aligned on 64bits including the
2271 * u32 size, so it's safe to use mem_bswap_64.
2274 mem_bswap_64((void *) array, data->raw_size);
2276 array = (void *)array + sizeof(u32);
2278 OVERFLOW_CHECK(array, data->raw_size, max_size);
2279 data->raw_data = (void *)array;
2280 array = (void *)array + data->raw_size;
2283 if (type & PERF_SAMPLE_BRANCH_STACK) {
2284 const u64 max_branch_nr = UINT64_MAX /
2285 sizeof(struct branch_entry);
2287 OVERFLOW_CHECK_u64(array);
2288 data->branch_stack = (struct branch_stack *)array++;
2290 if (data->branch_stack->nr > max_branch_nr)
2292 sz = data->branch_stack->nr * sizeof(struct branch_entry);
2293 OVERFLOW_CHECK(array, sz, max_size);
2294 array = (void *)array + sz;
2297 if (type & PERF_SAMPLE_REGS_USER) {
2298 OVERFLOW_CHECK_u64(array);
2299 data->user_regs.abi = *array;
2302 if (data->user_regs.abi) {
2303 u64 mask = evsel->core.attr.sample_regs_user;
2305 sz = hweight64(mask) * sizeof(u64);
2306 OVERFLOW_CHECK(array, sz, max_size);
2307 data->user_regs.mask = mask;
2308 data->user_regs.regs = (u64 *)array;
2309 array = (void *)array + sz;
2313 if (type & PERF_SAMPLE_STACK_USER) {
2314 OVERFLOW_CHECK_u64(array);
2317 data->user_stack.offset = ((char *)(array - 1)
2321 data->user_stack.size = 0;
2323 OVERFLOW_CHECK(array, sz, max_size);
2324 data->user_stack.data = (char *)array;
2325 array = (void *)array + sz;
2326 OVERFLOW_CHECK_u64(array);
2327 data->user_stack.size = *array++;
2328 if (WARN_ONCE(data->user_stack.size > sz,
2329 "user stack dump failure\n"))
2334 if (type & PERF_SAMPLE_WEIGHT) {
2335 OVERFLOW_CHECK_u64(array);
2336 data->weight = *array;
2340 if (type & PERF_SAMPLE_DATA_SRC) {
2341 OVERFLOW_CHECK_u64(array);
2342 data->data_src = *array;
2346 if (type & PERF_SAMPLE_TRANSACTION) {
2347 OVERFLOW_CHECK_u64(array);
2348 data->transaction = *array;
2352 data->intr_regs.abi = PERF_SAMPLE_REGS_ABI_NONE;
2353 if (type & PERF_SAMPLE_REGS_INTR) {
2354 OVERFLOW_CHECK_u64(array);
2355 data->intr_regs.abi = *array;
2358 if (data->intr_regs.abi != PERF_SAMPLE_REGS_ABI_NONE) {
2359 u64 mask = evsel->core.attr.sample_regs_intr;
2361 sz = hweight64(mask) * sizeof(u64);
2362 OVERFLOW_CHECK(array, sz, max_size);
2363 data->intr_regs.mask = mask;
2364 data->intr_regs.regs = (u64 *)array;
2365 array = (void *)array + sz;
2369 data->phys_addr = 0;
2370 if (type & PERF_SAMPLE_PHYS_ADDR) {
2371 data->phys_addr = *array;
2378 int perf_evsel__parse_sample_timestamp(struct evsel *evsel,
2379 union perf_event *event,
2382 u64 type = evsel->core.attr.sample_type;
2385 if (!(type & PERF_SAMPLE_TIME))
2388 if (event->header.type != PERF_RECORD_SAMPLE) {
2389 struct perf_sample data = {
2393 if (!evsel->core.attr.sample_id_all)
2395 if (perf_evsel__parse_id_sample(evsel, event, &data))
2398 *timestamp = data.time;
2402 array = event->sample.array;
2404 if (perf_event__check_size(event, evsel->sample_size))
2407 if (type & PERF_SAMPLE_IDENTIFIER)
2410 if (type & PERF_SAMPLE_IP)
2413 if (type & PERF_SAMPLE_TID)
2416 if (type & PERF_SAMPLE_TIME)
2417 *timestamp = *array;
2422 size_t perf_event__sample_event_size(const struct perf_sample *sample, u64 type,
2425 size_t sz, result = sizeof(struct perf_record_sample);
2427 if (type & PERF_SAMPLE_IDENTIFIER)
2428 result += sizeof(u64);
2430 if (type & PERF_SAMPLE_IP)
2431 result += sizeof(u64);
2433 if (type & PERF_SAMPLE_TID)
2434 result += sizeof(u64);
2436 if (type & PERF_SAMPLE_TIME)
2437 result += sizeof(u64);
2439 if (type & PERF_SAMPLE_ADDR)
2440 result += sizeof(u64);
2442 if (type & PERF_SAMPLE_ID)
2443 result += sizeof(u64);
2445 if (type & PERF_SAMPLE_STREAM_ID)
2446 result += sizeof(u64);
2448 if (type & PERF_SAMPLE_CPU)
2449 result += sizeof(u64);
2451 if (type & PERF_SAMPLE_PERIOD)
2452 result += sizeof(u64);
2454 if (type & PERF_SAMPLE_READ) {
2455 result += sizeof(u64);
2456 if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED)
2457 result += sizeof(u64);
2458 if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING)
2459 result += sizeof(u64);
2460 /* PERF_FORMAT_ID is forced for PERF_SAMPLE_READ */
2461 if (read_format & PERF_FORMAT_GROUP) {
2462 sz = sample->read.group.nr *
2463 sizeof(struct sample_read_value);
2466 result += sizeof(u64);
2470 if (type & PERF_SAMPLE_CALLCHAIN) {
2471 sz = (sample->callchain->nr + 1) * sizeof(u64);
2475 if (type & PERF_SAMPLE_RAW) {
2476 result += sizeof(u32);
2477 result += sample->raw_size;
2480 if (type & PERF_SAMPLE_BRANCH_STACK) {
2481 sz = sample->branch_stack->nr * sizeof(struct branch_entry);
2486 if (type & PERF_SAMPLE_REGS_USER) {
2487 if (sample->user_regs.abi) {
2488 result += sizeof(u64);
2489 sz = hweight64(sample->user_regs.mask) * sizeof(u64);
2492 result += sizeof(u64);
2496 if (type & PERF_SAMPLE_STACK_USER) {
2497 sz = sample->user_stack.size;
2498 result += sizeof(u64);
2501 result += sizeof(u64);
2505 if (type & PERF_SAMPLE_WEIGHT)
2506 result += sizeof(u64);
2508 if (type & PERF_SAMPLE_DATA_SRC)
2509 result += sizeof(u64);
2511 if (type & PERF_SAMPLE_TRANSACTION)
2512 result += sizeof(u64);
2514 if (type & PERF_SAMPLE_REGS_INTR) {
2515 if (sample->intr_regs.abi) {
2516 result += sizeof(u64);
2517 sz = hweight64(sample->intr_regs.mask) * sizeof(u64);
2520 result += sizeof(u64);
2524 if (type & PERF_SAMPLE_PHYS_ADDR)
2525 result += sizeof(u64);
2530 int perf_event__synthesize_sample(union perf_event *event, u64 type,
2532 const struct perf_sample *sample)
2537 * used for cross-endian analysis. See git commit 65014ab3
2538 * for why this goofiness is needed.
2542 array = event->sample.array;
2544 if (type & PERF_SAMPLE_IDENTIFIER) {
2545 *array = sample->id;
2549 if (type & PERF_SAMPLE_IP) {
2550 *array = sample->ip;
2554 if (type & PERF_SAMPLE_TID) {
2555 u.val32[0] = sample->pid;
2556 u.val32[1] = sample->tid;
2561 if (type & PERF_SAMPLE_TIME) {
2562 *array = sample->time;
2566 if (type & PERF_SAMPLE_ADDR) {
2567 *array = sample->addr;
2571 if (type & PERF_SAMPLE_ID) {
2572 *array = sample->id;
2576 if (type & PERF_SAMPLE_STREAM_ID) {
2577 *array = sample->stream_id;
2581 if (type & PERF_SAMPLE_CPU) {
2582 u.val32[0] = sample->cpu;
2588 if (type & PERF_SAMPLE_PERIOD) {
2589 *array = sample->period;
2593 if (type & PERF_SAMPLE_READ) {
2594 if (read_format & PERF_FORMAT_GROUP)
2595 *array = sample->read.group.nr;
2597 *array = sample->read.one.value;
2600 if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED) {
2601 *array = sample->read.time_enabled;
2605 if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING) {
2606 *array = sample->read.time_running;
2610 /* PERF_FORMAT_ID is forced for PERF_SAMPLE_READ */
2611 if (read_format & PERF_FORMAT_GROUP) {
2612 sz = sample->read.group.nr *
2613 sizeof(struct sample_read_value);
2614 memcpy(array, sample->read.group.values, sz);
2615 array = (void *)array + sz;
2617 *array = sample->read.one.id;
2622 if (type & PERF_SAMPLE_CALLCHAIN) {
2623 sz = (sample->callchain->nr + 1) * sizeof(u64);
2624 memcpy(array, sample->callchain, sz);
2625 array = (void *)array + sz;
2628 if (type & PERF_SAMPLE_RAW) {
2629 u.val32[0] = sample->raw_size;
2631 array = (void *)array + sizeof(u32);
2633 memcpy(array, sample->raw_data, sample->raw_size);
2634 array = (void *)array + sample->raw_size;
2637 if (type & PERF_SAMPLE_BRANCH_STACK) {
2638 sz = sample->branch_stack->nr * sizeof(struct branch_entry);
2640 memcpy(array, sample->branch_stack, sz);
2641 array = (void *)array + sz;
2644 if (type & PERF_SAMPLE_REGS_USER) {
2645 if (sample->user_regs.abi) {
2646 *array++ = sample->user_regs.abi;
2647 sz = hweight64(sample->user_regs.mask) * sizeof(u64);
2648 memcpy(array, sample->user_regs.regs, sz);
2649 array = (void *)array + sz;
2655 if (type & PERF_SAMPLE_STACK_USER) {
2656 sz = sample->user_stack.size;
2659 memcpy(array, sample->user_stack.data, sz);
2660 array = (void *)array + sz;
2665 if (type & PERF_SAMPLE_WEIGHT) {
2666 *array = sample->weight;
2670 if (type & PERF_SAMPLE_DATA_SRC) {
2671 *array = sample->data_src;
2675 if (type & PERF_SAMPLE_TRANSACTION) {
2676 *array = sample->transaction;
2680 if (type & PERF_SAMPLE_REGS_INTR) {
2681 if (sample->intr_regs.abi) {
2682 *array++ = sample->intr_regs.abi;
2683 sz = hweight64(sample->intr_regs.mask) * sizeof(u64);
2684 memcpy(array, sample->intr_regs.regs, sz);
2685 array = (void *)array + sz;
2691 if (type & PERF_SAMPLE_PHYS_ADDR) {
2692 *array = sample->phys_addr;
2699 struct tep_format_field *perf_evsel__field(struct evsel *evsel, const char *name)
2701 return tep_find_field(evsel->tp_format, name);
2704 void *perf_evsel__rawptr(struct evsel *evsel, struct perf_sample *sample,
2707 struct tep_format_field *field = perf_evsel__field(evsel, name);
2713 offset = field->offset;
2715 if (field->flags & TEP_FIELD_IS_DYNAMIC) {
2716 offset = *(int *)(sample->raw_data + field->offset);
2720 return sample->raw_data + offset;
2723 u64 format_field__intval(struct tep_format_field *field, struct perf_sample *sample,
2727 void *ptr = sample->raw_data + field->offset;
2729 switch (field->size) {
2733 value = *(u16 *)ptr;
2736 value = *(u32 *)ptr;
2739 memcpy(&value, ptr, sizeof(u64));
2748 switch (field->size) {
2750 return bswap_16(value);
2752 return bswap_32(value);
2754 return bswap_64(value);
2762 u64 perf_evsel__intval(struct evsel *evsel, struct perf_sample *sample,
2765 struct tep_format_field *field = perf_evsel__field(evsel, name);
2770 return field ? format_field__intval(field, sample, evsel->needs_swap) : 0;
2773 bool perf_evsel__fallback(struct evsel *evsel, int err,
2774 char *msg, size_t msgsize)
2778 if ((err == ENOENT || err == ENXIO || err == ENODEV) &&
2779 evsel->core.attr.type == PERF_TYPE_HARDWARE &&
2780 evsel->core.attr.config == PERF_COUNT_HW_CPU_CYCLES) {
2782 * If it's cycles then fall back to hrtimer based
2783 * cpu-clock-tick sw counter, which is always available even if
2786 * PPC returns ENXIO until 2.6.37 (behavior changed with commit
2789 scnprintf(msg, msgsize, "%s",
2790 "The cycles event is not supported, trying to fall back to cpu-clock-ticks");
2792 evsel->core.attr.type = PERF_TYPE_SOFTWARE;
2793 evsel->core.attr.config = PERF_COUNT_SW_CPU_CLOCK;
2795 zfree(&evsel->name);
2797 } else if (err == EACCES && !evsel->core.attr.exclude_kernel &&
2798 (paranoid = perf_event_paranoid()) > 1) {
2799 const char *name = perf_evsel__name(evsel);
2801 const char *sep = ":";
2803 /* Is there already the separator in the name. */
2804 if (strchr(name, '/') ||
2808 if (asprintf(&new_name, "%s%su", name, sep) < 0)
2813 evsel->name = new_name;
2814 scnprintf(msg, msgsize,
2815 "kernel.perf_event_paranoid=%d, trying to fall back to excluding kernel samples", paranoid);
2816 evsel->core.attr.exclude_kernel = 1;
2824 static bool find_process(const char *name)
2826 size_t len = strlen(name);
2831 dir = opendir(procfs__mountpoint());
2835 /* Walk through the directory. */
2836 while (ret && (d = readdir(dir)) != NULL) {
2837 char path[PATH_MAX];
2841 if ((d->d_type != DT_DIR) ||
2842 !strcmp(".", d->d_name) ||
2843 !strcmp("..", d->d_name))
2846 scnprintf(path, sizeof(path), "%s/%s/comm",
2847 procfs__mountpoint(), d->d_name);
2849 if (filename__read_str(path, &data, &size))
2852 ret = strncmp(name, data, len);
2857 return ret ? false : true;
2860 int perf_evsel__open_strerror(struct evsel *evsel, struct target *target,
2861 int err, char *msg, size_t size)
2863 char sbuf[STRERR_BUFSIZE];
2870 printed = scnprintf(msg, size,
2871 "No permission to enable %s event.\n\n",
2872 perf_evsel__name(evsel));
2874 return scnprintf(msg + printed, size - printed,
2875 "You may not have permission to collect %sstats.\n\n"
2876 "Consider tweaking /proc/sys/kernel/perf_event_paranoid,\n"
2877 "which controls use of the performance events system by\n"
2878 "unprivileged users (without CAP_SYS_ADMIN).\n\n"
2879 "The current value is %d:\n\n"
2880 " -1: Allow use of (almost) all events by all users\n"
2881 " Ignore mlock limit after perf_event_mlock_kb without CAP_IPC_LOCK\n"
2882 ">= 0: Disallow ftrace function tracepoint by users without CAP_SYS_ADMIN\n"
2883 " Disallow raw tracepoint access by users without CAP_SYS_ADMIN\n"
2884 ">= 1: Disallow CPU event access by users without CAP_SYS_ADMIN\n"
2885 ">= 2: Disallow kernel profiling by users without CAP_SYS_ADMIN\n\n"
2886 "To make this setting permanent, edit /etc/sysctl.conf too, e.g.:\n\n"
2887 " kernel.perf_event_paranoid = -1\n" ,
2888 target->system_wide ? "system-wide " : "",
2889 perf_event_paranoid());
2891 return scnprintf(msg, size, "The %s event is not supported.",
2892 perf_evsel__name(evsel));
2894 return scnprintf(msg, size, "%s",
2895 "Too many events are opened.\n"
2896 "Probably the maximum number of open file descriptors has been reached.\n"
2897 "Hint: Try again after reducing the number of events.\n"
2898 "Hint: Try increasing the limit with 'ulimit -n <limit>'");
2900 if (evsel__has_callchain(evsel) &&
2901 access("/proc/sys/kernel/perf_event_max_stack", F_OK) == 0)
2902 return scnprintf(msg, size,
2903 "Not enough memory to setup event with callchain.\n"
2904 "Hint: Try tweaking /proc/sys/kernel/perf_event_max_stack\n"
2905 "Hint: Current value: %d", sysctl__max_stack());
2908 if (target->cpu_list)
2909 return scnprintf(msg, size, "%s",
2910 "No such device - did you specify an out-of-range profile CPU?");
2913 if (evsel->core.attr.sample_period != 0)
2914 return scnprintf(msg, size,
2915 "%s: PMU Hardware doesn't support sampling/overflow-interrupts. Try 'perf stat'",
2916 perf_evsel__name(evsel));
2917 if (evsel->core.attr.precise_ip)
2918 return scnprintf(msg, size, "%s",
2919 "\'precise\' request may not be supported. Try removing 'p' modifier.");
2920 #if defined(__i386__) || defined(__x86_64__)
2921 if (evsel->core.attr.type == PERF_TYPE_HARDWARE)
2922 return scnprintf(msg, size, "%s",
2923 "No hardware sampling interrupt available.\n");
2927 if (find_process("oprofiled"))
2928 return scnprintf(msg, size,
2929 "The PMU counters are busy/taken by another profiler.\n"
2930 "We found oprofile daemon running, please stop it and try again.");
2933 if (evsel->core.attr.write_backward && perf_missing_features.write_backward)
2934 return scnprintf(msg, size, "Reading from overwrite event is not supported by this kernel.");
2935 if (perf_missing_features.clockid)
2936 return scnprintf(msg, size, "clockid feature not supported.");
2937 if (perf_missing_features.clockid_wrong)
2938 return scnprintf(msg, size, "wrong clockid (%d).", clockid);
2939 if (perf_missing_features.aux_output)
2940 return scnprintf(msg, size, "The 'aux_output' feature is not supported, update the kernel.");
2946 return scnprintf(msg, size,
2947 "The sys_perf_event_open() syscall returned with %d (%s) for event (%s).\n"
2948 "/bin/dmesg | grep -i perf may provide additional information.\n",
2949 err, str_error_r(err, sbuf, sizeof(sbuf)),
2950 perf_evsel__name(evsel));
2953 struct perf_env *perf_evsel__env(struct evsel *evsel)
2955 if (evsel && evsel->evlist)
2956 return evsel->evlist->env;
2960 static int store_evsel_ids(struct evsel *evsel, struct evlist *evlist)
2964 for (cpu = 0; cpu < xyarray__max_x(evsel->core.fd); cpu++) {
2965 for (thread = 0; thread < xyarray__max_y(evsel->core.fd);
2967 int fd = FD(evsel, cpu, thread);
2969 if (perf_evlist__id_add_fd(evlist, evsel,
2970 cpu, thread, fd) < 0)
2978 int perf_evsel__store_ids(struct evsel *evsel, struct evlist *evlist)
2980 struct perf_cpu_map *cpus = evsel->core.cpus;
2981 struct perf_thread_map *threads = evsel->core.threads;
2983 if (perf_evsel__alloc_id(evsel, cpus->nr, threads->nr))
2986 return store_evsel_ids(evsel, evlist);