1 | // SPDX-License-Identifier: GPL-2.0-only |
2 | /* |
3 | * Copyright (C) 2011, Red Hat Inc, Arnaldo Carvalho de Melo <acme@redhat.com> |
4 | * |
5 | * Parts came from builtin-{top,stat,record}.c, see those files for further |
6 | * copyright notes. |
7 | */ |
8 | #include <api/fs/fs.h> |
9 | #include <errno.h> |
10 | #include <inttypes.h> |
11 | #include <poll.h> |
12 | #include "cpumap.h" |
13 | #include "util/mmap.h" |
14 | #include "thread_map.h" |
15 | #include "target.h" |
16 | #include "evlist.h" |
17 | #include "evsel.h" |
18 | #include "record.h" |
19 | #include "debug.h" |
20 | #include "units.h" |
21 | #include "bpf_counter.h" |
22 | #include <internal/lib.h> // page_size |
23 | #include "affinity.h" |
24 | #include "../perf.h" |
25 | #include "asm/bug.h" |
26 | #include "bpf-event.h" |
27 | #include "util/event.h" |
28 | #include "util/string2.h" |
29 | #include "util/perf_api_probe.h" |
30 | #include "util/evsel_fprintf.h" |
31 | #include "util/pmu.h" |
32 | #include "util/sample.h" |
33 | #include "util/bpf-filter.h" |
34 | #include "util/stat.h" |
35 | #include "util/util.h" |
36 | #include <signal.h> |
37 | #include <unistd.h> |
38 | #include <sched.h> |
39 | #include <stdlib.h> |
40 | |
41 | #include "parse-events.h" |
42 | #include <subcmd/parse-options.h> |
43 | |
44 | #include <fcntl.h> |
45 | #include <sys/ioctl.h> |
46 | #include <sys/mman.h> |
47 | #include <sys/prctl.h> |
48 | #include <sys/timerfd.h> |
49 | |
50 | #include <linux/bitops.h> |
51 | #include <linux/hash.h> |
52 | #include <linux/log2.h> |
53 | #include <linux/err.h> |
54 | #include <linux/string.h> |
55 | #include <linux/time64.h> |
56 | #include <linux/zalloc.h> |
57 | #include <perf/evlist.h> |
58 | #include <perf/evsel.h> |
59 | #include <perf/cpumap.h> |
60 | #include <perf/mmap.h> |
61 | |
62 | #include <internal/xyarray.h> |
63 | |
64 | #ifdef LACKS_SIGQUEUE_PROTOTYPE |
65 | int sigqueue(pid_t pid, int sig, const union sigval value); |
66 | #endif |
67 | |
68 | #define FD(e, x, y) (*(int *)xyarray__entry(e->core.fd, x, y)) |
69 | #define SID(e, x, y) xyarray__entry(e->core.sample_id, x, y) |
70 | |
71 | void evlist__init(struct evlist *evlist, struct perf_cpu_map *cpus, |
72 | struct perf_thread_map *threads) |
73 | { |
74 | perf_evlist__init(&evlist->core); |
75 | perf_evlist__set_maps(&evlist->core, cpus, threads); |
76 | evlist->workload.pid = -1; |
77 | evlist->bkw_mmap_state = BKW_MMAP_NOTREADY; |
78 | evlist->ctl_fd.fd = -1; |
79 | evlist->ctl_fd.ack = -1; |
80 | evlist->ctl_fd.pos = -1; |
81 | } |
82 | |
83 | struct evlist *evlist__new(void) |
84 | { |
85 | struct evlist *evlist = zalloc(sizeof(*evlist)); |
86 | |
87 | if (evlist != NULL) |
88 | evlist__init(evlist, NULL, NULL); |
89 | |
90 | return evlist; |
91 | } |
92 | |
93 | struct evlist *evlist__new_default(void) |
94 | { |
95 | struct evlist *evlist = evlist__new(); |
96 | bool can_profile_kernel; |
97 | int err; |
98 | |
99 | if (!evlist) |
100 | return NULL; |
101 | |
102 | can_profile_kernel = perf_event_paranoid_check(1); |
103 | err = parse_event(evlist, str: can_profile_kernel ? "cycles:P" : "cycles:Pu" ); |
104 | if (err) { |
105 | evlist__delete(evlist); |
106 | return NULL; |
107 | } |
108 | |
109 | if (evlist->core.nr_entries > 1) { |
110 | struct evsel *evsel; |
111 | |
112 | evlist__for_each_entry(evlist, evsel) |
113 | evsel__set_sample_id(evsel, /*can_sample_identifier=*/use_sample_identifier: false); |
114 | } |
115 | |
116 | return evlist; |
117 | } |
118 | |
119 | struct evlist *evlist__new_dummy(void) |
120 | { |
121 | struct evlist *evlist = evlist__new(); |
122 | |
123 | if (evlist && evlist__add_dummy(evlist)) { |
124 | evlist__delete(evlist); |
125 | evlist = NULL; |
126 | } |
127 | |
128 | return evlist; |
129 | } |
130 | |
131 | /** |
132 | * evlist__set_id_pos - set the positions of event ids. |
133 | * @evlist: selected event list |
134 | * |
135 | * Events with compatible sample types all have the same id_pos |
136 | * and is_pos. For convenience, put a copy on evlist. |
137 | */ |
138 | void evlist__set_id_pos(struct evlist *evlist) |
139 | { |
140 | struct evsel *first = evlist__first(evlist); |
141 | |
142 | evlist->id_pos = first->id_pos; |
143 | evlist->is_pos = first->is_pos; |
144 | } |
145 | |
146 | static void evlist__update_id_pos(struct evlist *evlist) |
147 | { |
148 | struct evsel *evsel; |
149 | |
150 | evlist__for_each_entry(evlist, evsel) |
151 | evsel__calc_id_pos(evsel); |
152 | |
153 | evlist__set_id_pos(evlist); |
154 | } |
155 | |
156 | static void evlist__purge(struct evlist *evlist) |
157 | { |
158 | struct evsel *pos, *n; |
159 | |
160 | evlist__for_each_entry_safe(evlist, n, pos) { |
161 | list_del_init(entry: &pos->core.node); |
162 | pos->evlist = NULL; |
163 | evsel__delete(evsel: pos); |
164 | } |
165 | |
166 | evlist->core.nr_entries = 0; |
167 | } |
168 | |
169 | void evlist__exit(struct evlist *evlist) |
170 | { |
171 | event_enable_timer__exit(ep: &evlist->eet); |
172 | zfree(&evlist->mmap); |
173 | zfree(&evlist->overwrite_mmap); |
174 | perf_evlist__exit(&evlist->core); |
175 | } |
176 | |
177 | void evlist__delete(struct evlist *evlist) |
178 | { |
179 | if (evlist == NULL) |
180 | return; |
181 | |
182 | evlist__free_stats(evlist); |
183 | evlist__munmap(evlist); |
184 | evlist__close(evlist); |
185 | evlist__purge(evlist); |
186 | evlist__exit(evlist); |
187 | free(evlist); |
188 | } |
189 | |
190 | void evlist__add(struct evlist *evlist, struct evsel *entry) |
191 | { |
192 | perf_evlist__add(&evlist->core, &entry->core); |
193 | entry->evlist = evlist; |
194 | entry->tracking = !entry->core.idx; |
195 | |
196 | if (evlist->core.nr_entries == 1) |
197 | evlist__set_id_pos(evlist); |
198 | } |
199 | |
200 | void evlist__remove(struct evlist *evlist, struct evsel *evsel) |
201 | { |
202 | evsel->evlist = NULL; |
203 | perf_evlist__remove(&evlist->core, &evsel->core); |
204 | } |
205 | |
206 | void evlist__splice_list_tail(struct evlist *evlist, struct list_head *list) |
207 | { |
208 | while (!list_empty(head: list)) { |
209 | struct evsel *evsel, *temp, *leader = NULL; |
210 | |
211 | __evlist__for_each_entry_safe(list, temp, evsel) { |
212 | list_del_init(entry: &evsel->core.node); |
213 | evlist__add(evlist, entry: evsel); |
214 | leader = evsel; |
215 | break; |
216 | } |
217 | |
218 | __evlist__for_each_entry_safe(list, temp, evsel) { |
219 | if (evsel__has_leader(evsel, leader)) { |
220 | list_del_init(entry: &evsel->core.node); |
221 | evlist__add(evlist, entry: evsel); |
222 | } |
223 | } |
224 | } |
225 | } |
226 | |
227 | int __evlist__set_tracepoints_handlers(struct evlist *evlist, |
228 | const struct evsel_str_handler *assocs, size_t nr_assocs) |
229 | { |
230 | size_t i; |
231 | int err; |
232 | |
233 | for (i = 0; i < nr_assocs; i++) { |
234 | // Adding a handler for an event not in this evlist, just ignore it. |
235 | struct evsel *evsel = evlist__find_tracepoint_by_name(evlist, name: assocs[i].name); |
236 | if (evsel == NULL) |
237 | continue; |
238 | |
239 | err = -EEXIST; |
240 | if (evsel->handler != NULL) |
241 | goto out; |
242 | evsel->handler = assocs[i].handler; |
243 | } |
244 | |
245 | err = 0; |
246 | out: |
247 | return err; |
248 | } |
249 | |
250 | static void evlist__set_leader(struct evlist *evlist) |
251 | { |
252 | perf_evlist__set_leader(&evlist->core); |
253 | } |
254 | |
255 | static struct evsel *evlist__dummy_event(struct evlist *evlist) |
256 | { |
257 | struct perf_event_attr attr = { |
258 | .type = PERF_TYPE_SOFTWARE, |
259 | .config = PERF_COUNT_SW_DUMMY, |
260 | .size = sizeof(attr), /* to capture ABI version */ |
261 | /* Avoid frequency mode for dummy events to avoid associated timers. */ |
262 | .freq = 0, |
263 | .sample_period = 1, |
264 | }; |
265 | |
266 | return evsel__new_idx(attr: &attr, idx: evlist->core.nr_entries); |
267 | } |
268 | |
269 | int evlist__add_dummy(struct evlist *evlist) |
270 | { |
271 | struct evsel *evsel = evlist__dummy_event(evlist); |
272 | |
273 | if (evsel == NULL) |
274 | return -ENOMEM; |
275 | |
276 | evlist__add(evlist, entry: evsel); |
277 | return 0; |
278 | } |
279 | |
280 | struct evsel *evlist__add_aux_dummy(struct evlist *evlist, bool system_wide) |
281 | { |
282 | struct evsel *evsel = evlist__dummy_event(evlist); |
283 | |
284 | if (!evsel) |
285 | return NULL; |
286 | |
287 | evsel->core.attr.exclude_kernel = 1; |
288 | evsel->core.attr.exclude_guest = 1; |
289 | evsel->core.attr.exclude_hv = 1; |
290 | evsel->core.system_wide = system_wide; |
291 | evsel->no_aux_samples = true; |
292 | evsel->name = strdup("dummy:u" ); |
293 | |
294 | evlist__add(evlist, entry: evsel); |
295 | return evsel; |
296 | } |
297 | |
298 | #ifdef HAVE_LIBTRACEEVENT |
299 | struct evsel *evlist__add_sched_switch(struct evlist *evlist, bool system_wide) |
300 | { |
301 | struct evsel *evsel = evsel__newtp_idx("sched" , "sched_switch" , 0); |
302 | |
303 | if (IS_ERR(evsel)) |
304 | return evsel; |
305 | |
306 | evsel__set_sample_bit(evsel, CPU); |
307 | evsel__set_sample_bit(evsel, TIME); |
308 | |
309 | evsel->core.system_wide = system_wide; |
310 | evsel->no_aux_samples = true; |
311 | |
312 | evlist__add(evlist, evsel); |
313 | return evsel; |
314 | } |
315 | #endif |
316 | |
317 | int evlist__add_attrs(struct evlist *evlist, struct perf_event_attr *attrs, size_t nr_attrs) |
318 | { |
319 | struct evsel *evsel, *n; |
320 | LIST_HEAD(head); |
321 | size_t i; |
322 | |
323 | for (i = 0; i < nr_attrs; i++) { |
324 | evsel = evsel__new_idx(attr: attrs + i, idx: evlist->core.nr_entries + i); |
325 | if (evsel == NULL) |
326 | goto out_delete_partial_list; |
327 | list_add_tail(new: &evsel->core.node, head: &head); |
328 | } |
329 | |
330 | evlist__splice_list_tail(evlist, list: &head); |
331 | |
332 | return 0; |
333 | |
334 | out_delete_partial_list: |
335 | __evlist__for_each_entry_safe(&head, n, evsel) |
336 | evsel__delete(evsel); |
337 | return -1; |
338 | } |
339 | |
340 | int __evlist__add_default_attrs(struct evlist *evlist, struct perf_event_attr *attrs, size_t nr_attrs) |
341 | { |
342 | size_t i; |
343 | |
344 | for (i = 0; i < nr_attrs; i++) |
345 | event_attr_init(attrs + i); |
346 | |
347 | return evlist__add_attrs(evlist, attrs, nr_attrs); |
348 | } |
349 | |
350 | __weak int arch_evlist__add_default_attrs(struct evlist *evlist, |
351 | struct perf_event_attr *attrs, |
352 | size_t nr_attrs) |
353 | { |
354 | if (!nr_attrs) |
355 | return 0; |
356 | |
357 | return __evlist__add_default_attrs(evlist, attrs, nr_attrs); |
358 | } |
359 | |
360 | struct evsel *evlist__find_tracepoint_by_id(struct evlist *evlist, int id) |
361 | { |
362 | struct evsel *evsel; |
363 | |
364 | evlist__for_each_entry(evlist, evsel) { |
365 | if (evsel->core.attr.type == PERF_TYPE_TRACEPOINT && |
366 | (int)evsel->core.attr.config == id) |
367 | return evsel; |
368 | } |
369 | |
370 | return NULL; |
371 | } |
372 | |
373 | struct evsel *evlist__find_tracepoint_by_name(struct evlist *evlist, const char *name) |
374 | { |
375 | struct evsel *evsel; |
376 | |
377 | evlist__for_each_entry(evlist, evsel) { |
378 | if ((evsel->core.attr.type == PERF_TYPE_TRACEPOINT) && |
379 | (strcmp(evsel->name, name) == 0)) |
380 | return evsel; |
381 | } |
382 | |
383 | return NULL; |
384 | } |
385 | |
386 | #ifdef HAVE_LIBTRACEEVENT |
387 | int evlist__add_newtp(struct evlist *evlist, const char *sys, const char *name, void *handler) |
388 | { |
389 | struct evsel *evsel = evsel__newtp(sys, name); |
390 | |
391 | if (IS_ERR(evsel)) |
392 | return -1; |
393 | |
394 | evsel->handler = handler; |
395 | evlist__add(evlist, evsel); |
396 | return 0; |
397 | } |
398 | #endif |
399 | |
400 | struct evlist_cpu_iterator evlist__cpu_begin(struct evlist *evlist, struct affinity *affinity) |
401 | { |
402 | struct evlist_cpu_iterator itr = { |
403 | .container = evlist, |
404 | .evsel = NULL, |
405 | .cpu_map_idx = 0, |
406 | .evlist_cpu_map_idx = 0, |
407 | .evlist_cpu_map_nr = perf_cpu_map__nr(evlist->core.all_cpus), |
408 | .cpu = (struct perf_cpu){ .cpu = -1}, |
409 | .affinity = affinity, |
410 | }; |
411 | |
412 | if (evlist__empty(evlist)) { |
413 | /* Ensure the empty list doesn't iterate. */ |
414 | itr.evlist_cpu_map_idx = itr.evlist_cpu_map_nr; |
415 | } else { |
416 | itr.evsel = evlist__first(evlist); |
417 | if (itr.affinity) { |
418 | itr.cpu = perf_cpu_map__cpu(evlist->core.all_cpus, 0); |
419 | affinity__set(a: itr.affinity, cpu: itr.cpu.cpu); |
420 | itr.cpu_map_idx = perf_cpu_map__idx(itr.evsel->core.cpus, itr.cpu); |
421 | /* |
422 | * If this CPU isn't in the evsel's cpu map then advance |
423 | * through the list. |
424 | */ |
425 | if (itr.cpu_map_idx == -1) |
426 | evlist_cpu_iterator__next(evlist_cpu_itr: &itr); |
427 | } |
428 | } |
429 | return itr; |
430 | } |
431 | |
432 | void evlist_cpu_iterator__next(struct evlist_cpu_iterator *evlist_cpu_itr) |
433 | { |
434 | while (evlist_cpu_itr->evsel != evlist__last(evlist: evlist_cpu_itr->container)) { |
435 | evlist_cpu_itr->evsel = evsel__next(evsel: evlist_cpu_itr->evsel); |
436 | evlist_cpu_itr->cpu_map_idx = |
437 | perf_cpu_map__idx(evlist_cpu_itr->evsel->core.cpus, |
438 | evlist_cpu_itr->cpu); |
439 | if (evlist_cpu_itr->cpu_map_idx != -1) |
440 | return; |
441 | } |
442 | evlist_cpu_itr->evlist_cpu_map_idx++; |
443 | if (evlist_cpu_itr->evlist_cpu_map_idx < evlist_cpu_itr->evlist_cpu_map_nr) { |
444 | evlist_cpu_itr->evsel = evlist__first(evlist: evlist_cpu_itr->container); |
445 | evlist_cpu_itr->cpu = |
446 | perf_cpu_map__cpu(evlist_cpu_itr->container->core.all_cpus, |
447 | evlist_cpu_itr->evlist_cpu_map_idx); |
448 | if (evlist_cpu_itr->affinity) |
449 | affinity__set(a: evlist_cpu_itr->affinity, cpu: evlist_cpu_itr->cpu.cpu); |
450 | evlist_cpu_itr->cpu_map_idx = |
451 | perf_cpu_map__idx(evlist_cpu_itr->evsel->core.cpus, |
452 | evlist_cpu_itr->cpu); |
453 | /* |
454 | * If this CPU isn't in the evsel's cpu map then advance through |
455 | * the list. |
456 | */ |
457 | if (evlist_cpu_itr->cpu_map_idx == -1) |
458 | evlist_cpu_iterator__next(evlist_cpu_itr); |
459 | } |
460 | } |
461 | |
462 | bool evlist_cpu_iterator__end(const struct evlist_cpu_iterator *evlist_cpu_itr) |
463 | { |
464 | return evlist_cpu_itr->evlist_cpu_map_idx >= evlist_cpu_itr->evlist_cpu_map_nr; |
465 | } |
466 | |
467 | static int evsel__strcmp(struct evsel *pos, char *evsel_name) |
468 | { |
469 | if (!evsel_name) |
470 | return 0; |
471 | if (evsel__is_dummy_event(evsel: pos)) |
472 | return 1; |
473 | return !evsel__name_is(evsel: pos, name: evsel_name); |
474 | } |
475 | |
476 | static int evlist__is_enabled(struct evlist *evlist) |
477 | { |
478 | struct evsel *pos; |
479 | |
480 | evlist__for_each_entry(evlist, pos) { |
481 | if (!evsel__is_group_leader(evsel: pos) || !pos->core.fd) |
482 | continue; |
483 | /* If at least one event is enabled, evlist is enabled. */ |
484 | if (!pos->disabled) |
485 | return true; |
486 | } |
487 | return false; |
488 | } |
489 | |
490 | static void __evlist__disable(struct evlist *evlist, char *evsel_name, bool excl_dummy) |
491 | { |
492 | struct evsel *pos; |
493 | struct evlist_cpu_iterator evlist_cpu_itr; |
494 | struct affinity saved_affinity, *affinity = NULL; |
495 | bool has_imm = false; |
496 | |
497 | // See explanation in evlist__close() |
498 | if (!cpu_map__is_dummy(cpus: evlist->core.user_requested_cpus)) { |
499 | if (affinity__setup(a: &saved_affinity) < 0) |
500 | return; |
501 | affinity = &saved_affinity; |
502 | } |
503 | |
504 | /* Disable 'immediate' events last */ |
505 | for (int imm = 0; imm <= 1; imm++) { |
506 | evlist__for_each_cpu(evlist_cpu_itr, evlist, affinity) { |
507 | pos = evlist_cpu_itr.evsel; |
508 | if (evsel__strcmp(pos, evsel_name)) |
509 | continue; |
510 | if (pos->disabled || !evsel__is_group_leader(evsel: pos) || !pos->core.fd) |
511 | continue; |
512 | if (excl_dummy && evsel__is_dummy_event(evsel: pos)) |
513 | continue; |
514 | if (pos->immediate) |
515 | has_imm = true; |
516 | if (pos->immediate != imm) |
517 | continue; |
518 | evsel__disable_cpu(evsel: pos, cpu_map_idx: evlist_cpu_itr.cpu_map_idx); |
519 | } |
520 | if (!has_imm) |
521 | break; |
522 | } |
523 | |
524 | affinity__cleanup(a: affinity); |
525 | evlist__for_each_entry(evlist, pos) { |
526 | if (evsel__strcmp(pos, evsel_name)) |
527 | continue; |
528 | if (!evsel__is_group_leader(evsel: pos) || !pos->core.fd) |
529 | continue; |
530 | if (excl_dummy && evsel__is_dummy_event(evsel: pos)) |
531 | continue; |
532 | pos->disabled = true; |
533 | } |
534 | |
535 | /* |
536 | * If we disabled only single event, we need to check |
537 | * the enabled state of the evlist manually. |
538 | */ |
539 | if (evsel_name) |
540 | evlist->enabled = evlist__is_enabled(evlist); |
541 | else |
542 | evlist->enabled = false; |
543 | } |
544 | |
545 | void evlist__disable(struct evlist *evlist) |
546 | { |
547 | __evlist__disable(evlist, NULL, excl_dummy: false); |
548 | } |
549 | |
550 | void evlist__disable_non_dummy(struct evlist *evlist) |
551 | { |
552 | __evlist__disable(evlist, NULL, excl_dummy: true); |
553 | } |
554 | |
555 | void evlist__disable_evsel(struct evlist *evlist, char *evsel_name) |
556 | { |
557 | __evlist__disable(evlist, evsel_name, excl_dummy: false); |
558 | } |
559 | |
560 | static void __evlist__enable(struct evlist *evlist, char *evsel_name, bool excl_dummy) |
561 | { |
562 | struct evsel *pos; |
563 | struct evlist_cpu_iterator evlist_cpu_itr; |
564 | struct affinity saved_affinity, *affinity = NULL; |
565 | |
566 | // See explanation in evlist__close() |
567 | if (!cpu_map__is_dummy(cpus: evlist->core.user_requested_cpus)) { |
568 | if (affinity__setup(a: &saved_affinity) < 0) |
569 | return; |
570 | affinity = &saved_affinity; |
571 | } |
572 | |
573 | evlist__for_each_cpu(evlist_cpu_itr, evlist, affinity) { |
574 | pos = evlist_cpu_itr.evsel; |
575 | if (evsel__strcmp(pos, evsel_name)) |
576 | continue; |
577 | if (!evsel__is_group_leader(evsel: pos) || !pos->core.fd) |
578 | continue; |
579 | if (excl_dummy && evsel__is_dummy_event(evsel: pos)) |
580 | continue; |
581 | evsel__enable_cpu(evsel: pos, cpu_map_idx: evlist_cpu_itr.cpu_map_idx); |
582 | } |
583 | affinity__cleanup(a: affinity); |
584 | evlist__for_each_entry(evlist, pos) { |
585 | if (evsel__strcmp(pos, evsel_name)) |
586 | continue; |
587 | if (!evsel__is_group_leader(evsel: pos) || !pos->core.fd) |
588 | continue; |
589 | if (excl_dummy && evsel__is_dummy_event(evsel: pos)) |
590 | continue; |
591 | pos->disabled = false; |
592 | } |
593 | |
594 | /* |
595 | * Even single event sets the 'enabled' for evlist, |
596 | * so the toggle can work properly and toggle to |
597 | * 'disabled' state. |
598 | */ |
599 | evlist->enabled = true; |
600 | } |
601 | |
602 | void evlist__enable(struct evlist *evlist) |
603 | { |
604 | __evlist__enable(evlist, NULL, excl_dummy: false); |
605 | } |
606 | |
607 | void evlist__enable_non_dummy(struct evlist *evlist) |
608 | { |
609 | __evlist__enable(evlist, NULL, excl_dummy: true); |
610 | } |
611 | |
612 | void evlist__enable_evsel(struct evlist *evlist, char *evsel_name) |
613 | { |
614 | __evlist__enable(evlist, evsel_name, excl_dummy: false); |
615 | } |
616 | |
617 | void evlist__toggle_enable(struct evlist *evlist) |
618 | { |
619 | (evlist->enabled ? evlist__disable : evlist__enable)(evlist); |
620 | } |
621 | |
622 | int evlist__add_pollfd(struct evlist *evlist, int fd) |
623 | { |
624 | return perf_evlist__add_pollfd(&evlist->core, fd, NULL, POLLIN, fdarray_flag__default); |
625 | } |
626 | |
627 | int evlist__filter_pollfd(struct evlist *evlist, short revents_and_mask) |
628 | { |
629 | return perf_evlist__filter_pollfd(&evlist->core, revents_and_mask); |
630 | } |
631 | |
632 | #ifdef HAVE_EVENTFD_SUPPORT |
633 | int evlist__add_wakeup_eventfd(struct evlist *evlist, int fd) |
634 | { |
635 | return perf_evlist__add_pollfd(&evlist->core, fd, NULL, POLLIN, |
636 | fdarray_flag__nonfilterable | |
637 | fdarray_flag__non_perf_event); |
638 | } |
639 | #endif |
640 | |
641 | int evlist__poll(struct evlist *evlist, int timeout) |
642 | { |
643 | return perf_evlist__poll(&evlist->core, timeout); |
644 | } |
645 | |
646 | struct perf_sample_id *evlist__id2sid(struct evlist *evlist, u64 id) |
647 | { |
648 | struct hlist_head *head; |
649 | struct perf_sample_id *sid; |
650 | int hash; |
651 | |
652 | hash = hash_64(val: id, bits: PERF_EVLIST__HLIST_BITS); |
653 | head = &evlist->core.heads[hash]; |
654 | |
655 | hlist_for_each_entry(sid, head, node) |
656 | if (sid->id == id) |
657 | return sid; |
658 | |
659 | return NULL; |
660 | } |
661 | |
662 | struct evsel *evlist__id2evsel(struct evlist *evlist, u64 id) |
663 | { |
664 | struct perf_sample_id *sid; |
665 | |
666 | if (evlist->core.nr_entries == 1 || !id) |
667 | return evlist__first(evlist); |
668 | |
669 | sid = evlist__id2sid(evlist, id); |
670 | if (sid) |
671 | return container_of(sid->evsel, struct evsel, core); |
672 | |
673 | if (!evlist__sample_id_all(evlist)) |
674 | return evlist__first(evlist); |
675 | |
676 | return NULL; |
677 | } |
678 | |
679 | struct evsel *evlist__id2evsel_strict(struct evlist *evlist, u64 id) |
680 | { |
681 | struct perf_sample_id *sid; |
682 | |
683 | if (!id) |
684 | return NULL; |
685 | |
686 | sid = evlist__id2sid(evlist, id); |
687 | if (sid) |
688 | return container_of(sid->evsel, struct evsel, core); |
689 | |
690 | return NULL; |
691 | } |
692 | |
693 | static int evlist__event2id(struct evlist *evlist, union perf_event *event, u64 *id) |
694 | { |
695 | const __u64 *array = event->sample.array; |
696 | ssize_t n; |
697 | |
698 | n = (event->header.size - sizeof(event->header)) >> 3; |
699 | |
700 | if (event->header.type == PERF_RECORD_SAMPLE) { |
701 | if (evlist->id_pos >= n) |
702 | return -1; |
703 | *id = array[evlist->id_pos]; |
704 | } else { |
705 | if (evlist->is_pos > n) |
706 | return -1; |
707 | n -= evlist->is_pos; |
708 | *id = array[n]; |
709 | } |
710 | return 0; |
711 | } |
712 | |
713 | struct evsel *evlist__event2evsel(struct evlist *evlist, union perf_event *event) |
714 | { |
715 | struct evsel *first = evlist__first(evlist); |
716 | struct hlist_head *head; |
717 | struct perf_sample_id *sid; |
718 | int hash; |
719 | u64 id; |
720 | |
721 | if (evlist->core.nr_entries == 1) |
722 | return first; |
723 | |
724 | if (!first->core.attr.sample_id_all && |
725 | event->header.type != PERF_RECORD_SAMPLE) |
726 | return first; |
727 | |
728 | if (evlist__event2id(evlist, event, id: &id)) |
729 | return NULL; |
730 | |
731 | /* Synthesized events have an id of zero */ |
732 | if (!id) |
733 | return first; |
734 | |
735 | hash = hash_64(val: id, bits: PERF_EVLIST__HLIST_BITS); |
736 | head = &evlist->core.heads[hash]; |
737 | |
738 | hlist_for_each_entry(sid, head, node) { |
739 | if (sid->id == id) |
740 | return container_of(sid->evsel, struct evsel, core); |
741 | } |
742 | return NULL; |
743 | } |
744 | |
745 | static int evlist__set_paused(struct evlist *evlist, bool value) |
746 | { |
747 | int i; |
748 | |
749 | if (!evlist->overwrite_mmap) |
750 | return 0; |
751 | |
752 | for (i = 0; i < evlist->core.nr_mmaps; i++) { |
753 | int fd = evlist->overwrite_mmap[i].core.fd; |
754 | int err; |
755 | |
756 | if (fd < 0) |
757 | continue; |
758 | err = ioctl(fd, PERF_EVENT_IOC_PAUSE_OUTPUT, value ? 1 : 0); |
759 | if (err) |
760 | return err; |
761 | } |
762 | return 0; |
763 | } |
764 | |
765 | static int evlist__pause(struct evlist *evlist) |
766 | { |
767 | return evlist__set_paused(evlist, value: true); |
768 | } |
769 | |
770 | static int evlist__resume(struct evlist *evlist) |
771 | { |
772 | return evlist__set_paused(evlist, value: false); |
773 | } |
774 | |
775 | static void evlist__munmap_nofree(struct evlist *evlist) |
776 | { |
777 | int i; |
778 | |
779 | if (evlist->mmap) |
780 | for (i = 0; i < evlist->core.nr_mmaps; i++) |
781 | perf_mmap__munmap(&evlist->mmap[i].core); |
782 | |
783 | if (evlist->overwrite_mmap) |
784 | for (i = 0; i < evlist->core.nr_mmaps; i++) |
785 | perf_mmap__munmap(&evlist->overwrite_mmap[i].core); |
786 | } |
787 | |
788 | void evlist__munmap(struct evlist *evlist) |
789 | { |
790 | evlist__munmap_nofree(evlist); |
791 | zfree(&evlist->mmap); |
792 | zfree(&evlist->overwrite_mmap); |
793 | } |
794 | |
795 | static void perf_mmap__unmap_cb(struct perf_mmap *map) |
796 | { |
797 | struct mmap *m = container_of(map, struct mmap, core); |
798 | |
799 | mmap__munmap(m); |
800 | } |
801 | |
802 | static struct mmap *evlist__alloc_mmap(struct evlist *evlist, |
803 | bool overwrite) |
804 | { |
805 | int i; |
806 | struct mmap *map; |
807 | |
808 | map = zalloc(evlist->core.nr_mmaps * sizeof(struct mmap)); |
809 | if (!map) |
810 | return NULL; |
811 | |
812 | for (i = 0; i < evlist->core.nr_mmaps; i++) { |
813 | struct perf_mmap *prev = i ? &map[i - 1].core : NULL; |
814 | |
815 | /* |
816 | * When the perf_mmap() call is made we grab one refcount, plus |
817 | * one extra to let perf_mmap__consume() get the last |
818 | * events after all real references (perf_mmap__get()) are |
819 | * dropped. |
820 | * |
821 | * Each PERF_EVENT_IOC_SET_OUTPUT points to this mmap and |
822 | * thus does perf_mmap__get() on it. |
823 | */ |
824 | perf_mmap__init(&map[i].core, prev, overwrite, perf_mmap__unmap_cb); |
825 | } |
826 | |
827 | return map; |
828 | } |
829 | |
830 | static void |
831 | perf_evlist__mmap_cb_idx(struct perf_evlist *_evlist, |
832 | struct perf_evsel *_evsel, |
833 | struct perf_mmap_param *_mp, |
834 | int idx) |
835 | { |
836 | struct evlist *evlist = container_of(_evlist, struct evlist, core); |
837 | struct mmap_params *mp = container_of(_mp, struct mmap_params, core); |
838 | struct evsel *evsel = container_of(_evsel, struct evsel, core); |
839 | |
840 | auxtrace_mmap_params__set_idx(mp: &mp->auxtrace_mp, evlist, evsel, idx); |
841 | } |
842 | |
843 | static struct perf_mmap* |
844 | perf_evlist__mmap_cb_get(struct perf_evlist *_evlist, bool overwrite, int idx) |
845 | { |
846 | struct evlist *evlist = container_of(_evlist, struct evlist, core); |
847 | struct mmap *maps; |
848 | |
849 | maps = overwrite ? evlist->overwrite_mmap : evlist->mmap; |
850 | |
851 | if (!maps) { |
852 | maps = evlist__alloc_mmap(evlist, overwrite); |
853 | if (!maps) |
854 | return NULL; |
855 | |
856 | if (overwrite) { |
857 | evlist->overwrite_mmap = maps; |
858 | if (evlist->bkw_mmap_state == BKW_MMAP_NOTREADY) |
859 | evlist__toggle_bkw_mmap(evlist, state: BKW_MMAP_RUNNING); |
860 | } else { |
861 | evlist->mmap = maps; |
862 | } |
863 | } |
864 | |
865 | return &maps[idx].core; |
866 | } |
867 | |
868 | static int |
869 | perf_evlist__mmap_cb_mmap(struct perf_mmap *_map, struct perf_mmap_param *_mp, |
870 | int output, struct perf_cpu cpu) |
871 | { |
872 | struct mmap *map = container_of(_map, struct mmap, core); |
873 | struct mmap_params *mp = container_of(_mp, struct mmap_params, core); |
874 | |
875 | return mmap__mmap(map, mp, output, cpu); |
876 | } |
877 | |
878 | unsigned long perf_event_mlock_kb_in_pages(void) |
879 | { |
880 | unsigned long pages; |
881 | int max; |
882 | |
883 | if (sysctl__read_int("kernel/perf_event_mlock_kb" , &max) < 0) { |
884 | /* |
885 | * Pick a once upon a time good value, i.e. things look |
886 | * strange since we can't read a sysctl value, but lets not |
887 | * die yet... |
888 | */ |
889 | max = 512; |
890 | } else { |
891 | max -= (page_size / 1024); |
892 | } |
893 | |
894 | pages = (max * 1024) / page_size; |
895 | if (!is_power_of_2(n: pages)) |
896 | pages = rounddown_pow_of_two(pages); |
897 | |
898 | return pages; |
899 | } |
900 | |
901 | size_t evlist__mmap_size(unsigned long pages) |
902 | { |
903 | if (pages == UINT_MAX) |
904 | pages = perf_event_mlock_kb_in_pages(); |
905 | else if (!is_power_of_2(n: pages)) |
906 | return 0; |
907 | |
908 | return (pages + 1) * page_size; |
909 | } |
910 | |
911 | static long parse_pages_arg(const char *str, unsigned long min, |
912 | unsigned long max) |
913 | { |
914 | unsigned long pages, val; |
915 | static struct parse_tag tags[] = { |
916 | { .tag = 'B', .mult = 1 }, |
917 | { .tag = 'K', .mult = 1 << 10 }, |
918 | { .tag = 'M', .mult = 1 << 20 }, |
919 | { .tag = 'G', .mult = 1 << 30 }, |
920 | { .tag = 0 }, |
921 | }; |
922 | |
923 | if (str == NULL) |
924 | return -EINVAL; |
925 | |
926 | val = parse_tag_value(str, tags); |
927 | if (val != (unsigned long) -1) { |
928 | /* we got file size value */ |
929 | pages = PERF_ALIGN(val, page_size) / page_size; |
930 | } else { |
931 | /* we got pages count value */ |
932 | char *eptr; |
933 | pages = strtoul(str, &eptr, 10); |
934 | if (*eptr != '\0') |
935 | return -EINVAL; |
936 | } |
937 | |
938 | if (pages == 0 && min == 0) { |
939 | /* leave number of pages at 0 */ |
940 | } else if (!is_power_of_2(n: pages)) { |
941 | char buf[100]; |
942 | |
943 | /* round pages up to next power of 2 */ |
944 | pages = roundup_pow_of_two(pages); |
945 | if (!pages) |
946 | return -EINVAL; |
947 | |
948 | unit_number__scnprintf(buf, size: sizeof(buf), n: pages * page_size); |
949 | pr_info("rounding mmap pages size to %s (%lu pages)\n" , |
950 | buf, pages); |
951 | } |
952 | |
953 | if (pages > max) |
954 | return -EINVAL; |
955 | |
956 | return pages; |
957 | } |
958 | |
959 | int __evlist__parse_mmap_pages(unsigned int *mmap_pages, const char *str) |
960 | { |
961 | unsigned long max = UINT_MAX; |
962 | long pages; |
963 | |
964 | if (max > SIZE_MAX / page_size) |
965 | max = SIZE_MAX / page_size; |
966 | |
967 | pages = parse_pages_arg(str, min: 1, max); |
968 | if (pages < 0) { |
969 | pr_err("Invalid argument for --mmap_pages/-m\n" ); |
970 | return -1; |
971 | } |
972 | |
973 | *mmap_pages = pages; |
974 | return 0; |
975 | } |
976 | |
977 | int evlist__parse_mmap_pages(const struct option *opt, const char *str, int unset __maybe_unused) |
978 | { |
979 | return __evlist__parse_mmap_pages(mmap_pages: opt->value, str); |
980 | } |
981 | |
982 | /** |
983 | * evlist__mmap_ex - Create mmaps to receive events. |
984 | * @evlist: list of events |
985 | * @pages: map length in pages |
986 | * @overwrite: overwrite older events? |
987 | * @auxtrace_pages - auxtrace map length in pages |
988 | * @auxtrace_overwrite - overwrite older auxtrace data? |
989 | * |
990 | * If @overwrite is %false the user needs to signal event consumption using |
991 | * perf_mmap__write_tail(). Using evlist__mmap_read() does this |
992 | * automatically. |
993 | * |
994 | * Similarly, if @auxtrace_overwrite is %false the user needs to signal data |
995 | * consumption using auxtrace_mmap__write_tail(). |
996 | * |
997 | * Return: %0 on success, negative error code otherwise. |
998 | */ |
999 | int evlist__mmap_ex(struct evlist *evlist, unsigned int pages, |
1000 | unsigned int auxtrace_pages, |
1001 | bool auxtrace_overwrite, int nr_cblocks, int affinity, int flush, |
1002 | int comp_level) |
1003 | { |
1004 | /* |
1005 | * Delay setting mp.prot: set it before calling perf_mmap__mmap. |
1006 | * Its value is decided by evsel's write_backward. |
1007 | * So &mp should not be passed through const pointer. |
1008 | */ |
1009 | struct mmap_params mp = { |
1010 | .nr_cblocks = nr_cblocks, |
1011 | .affinity = affinity, |
1012 | .flush = flush, |
1013 | .comp_level = comp_level |
1014 | }; |
1015 | struct perf_evlist_mmap_ops ops = { |
1016 | .idx = perf_evlist__mmap_cb_idx, |
1017 | .get = perf_evlist__mmap_cb_get, |
1018 | .mmap = perf_evlist__mmap_cb_mmap, |
1019 | }; |
1020 | |
1021 | evlist->core.mmap_len = evlist__mmap_size(pages); |
1022 | pr_debug("mmap size %zuB\n" , evlist->core.mmap_len); |
1023 | |
1024 | auxtrace_mmap_params__init(mp: &mp.auxtrace_mp, auxtrace_offset: evlist->core.mmap_len, |
1025 | auxtrace_pages, auxtrace_overwrite); |
1026 | |
1027 | return perf_evlist__mmap_ops(&evlist->core, &ops, &mp.core); |
1028 | } |
1029 | |
1030 | int evlist__mmap(struct evlist *evlist, unsigned int pages) |
1031 | { |
1032 | return evlist__mmap_ex(evlist, pages, auxtrace_pages: 0, auxtrace_overwrite: false, nr_cblocks: 0, affinity: PERF_AFFINITY_SYS, flush: 1, comp_level: 0); |
1033 | } |
1034 | |
1035 | int evlist__create_maps(struct evlist *evlist, struct target *target) |
1036 | { |
1037 | bool all_threads = (target->per_thread && target->system_wide); |
1038 | struct perf_cpu_map *cpus; |
1039 | struct perf_thread_map *threads; |
1040 | |
1041 | /* |
1042 | * If specify '-a' and '--per-thread' to perf record, perf record |
1043 | * will override '--per-thread'. target->per_thread = false and |
1044 | * target->system_wide = true. |
1045 | * |
1046 | * If specify '--per-thread' only to perf record, |
1047 | * target->per_thread = true and target->system_wide = false. |
1048 | * |
1049 | * So target->per_thread && target->system_wide is false. |
1050 | * For perf record, thread_map__new_str doesn't call |
1051 | * thread_map__new_all_cpus. That will keep perf record's |
1052 | * current behavior. |
1053 | * |
1054 | * For perf stat, it allows the case that target->per_thread and |
1055 | * target->system_wide are all true. It means to collect system-wide |
1056 | * per-thread data. thread_map__new_str will call |
1057 | * thread_map__new_all_cpus to enumerate all threads. |
1058 | */ |
1059 | threads = thread_map__new_str(pid: target->pid, tid: target->tid, uid: target->uid, |
1060 | all_threads); |
1061 | |
1062 | if (!threads) |
1063 | return -1; |
1064 | |
1065 | if (target__uses_dummy_map(target)) |
1066 | cpus = perf_cpu_map__new_any_cpu(); |
1067 | else |
1068 | cpus = perf_cpu_map__new(target->cpu_list); |
1069 | |
1070 | if (!cpus) |
1071 | goto out_delete_threads; |
1072 | |
1073 | evlist->core.has_user_cpus = !!target->cpu_list; |
1074 | |
1075 | perf_evlist__set_maps(&evlist->core, cpus, threads); |
1076 | |
1077 | /* as evlist now has references, put count here */ |
1078 | perf_cpu_map__put(cpus); |
1079 | perf_thread_map__put(threads); |
1080 | |
1081 | return 0; |
1082 | |
1083 | out_delete_threads: |
1084 | perf_thread_map__put(threads); |
1085 | return -1; |
1086 | } |
1087 | |
1088 | int evlist__apply_filters(struct evlist *evlist, struct evsel **err_evsel) |
1089 | { |
1090 | struct evsel *evsel; |
1091 | int err = 0; |
1092 | |
1093 | evlist__for_each_entry(evlist, evsel) { |
1094 | /* |
1095 | * filters only work for tracepoint event, which doesn't have cpu limit. |
1096 | * So evlist and evsel should always be same. |
1097 | */ |
1098 | if (evsel->filter) { |
1099 | err = perf_evsel__apply_filter(&evsel->core, evsel->filter); |
1100 | if (err) { |
1101 | *err_evsel = evsel; |
1102 | break; |
1103 | } |
1104 | } |
1105 | |
1106 | /* |
1107 | * non-tracepoint events can have BPF filters. |
1108 | */ |
1109 | if (!list_empty(head: &evsel->bpf_filters)) { |
1110 | err = perf_bpf_filter__prepare(evsel); |
1111 | if (err) { |
1112 | *err_evsel = evsel; |
1113 | break; |
1114 | } |
1115 | } |
1116 | } |
1117 | |
1118 | return err; |
1119 | } |
1120 | |
1121 | int evlist__set_tp_filter(struct evlist *evlist, const char *filter) |
1122 | { |
1123 | struct evsel *evsel; |
1124 | int err = 0; |
1125 | |
1126 | if (filter == NULL) |
1127 | return -1; |
1128 | |
1129 | evlist__for_each_entry(evlist, evsel) { |
1130 | if (evsel->core.attr.type != PERF_TYPE_TRACEPOINT) |
1131 | continue; |
1132 | |
1133 | err = evsel__set_filter(evsel, filter); |
1134 | if (err) |
1135 | break; |
1136 | } |
1137 | |
1138 | return err; |
1139 | } |
1140 | |
1141 | int evlist__append_tp_filter(struct evlist *evlist, const char *filter) |
1142 | { |
1143 | struct evsel *evsel; |
1144 | int err = 0; |
1145 | |
1146 | if (filter == NULL) |
1147 | return -1; |
1148 | |
1149 | evlist__for_each_entry(evlist, evsel) { |
1150 | if (evsel->core.attr.type != PERF_TYPE_TRACEPOINT) |
1151 | continue; |
1152 | |
1153 | err = evsel__append_tp_filter(evsel, filter); |
1154 | if (err) |
1155 | break; |
1156 | } |
1157 | |
1158 | return err; |
1159 | } |
1160 | |
1161 | char *asprintf__tp_filter_pids(size_t npids, pid_t *pids) |
1162 | { |
1163 | char *filter; |
1164 | size_t i; |
1165 | |
1166 | for (i = 0; i < npids; ++i) { |
1167 | if (i == 0) { |
1168 | if (asprintf(&filter, "common_pid != %d" , pids[i]) < 0) |
1169 | return NULL; |
1170 | } else { |
1171 | char *tmp; |
1172 | |
1173 | if (asprintf(&tmp, "%s && common_pid != %d" , filter, pids[i]) < 0) |
1174 | goto out_free; |
1175 | |
1176 | free(filter); |
1177 | filter = tmp; |
1178 | } |
1179 | } |
1180 | |
1181 | return filter; |
1182 | out_free: |
1183 | free(filter); |
1184 | return NULL; |
1185 | } |
1186 | |
1187 | int evlist__set_tp_filter_pids(struct evlist *evlist, size_t npids, pid_t *pids) |
1188 | { |
1189 | char *filter = asprintf__tp_filter_pids(npids, pids); |
1190 | int ret = evlist__set_tp_filter(evlist, filter); |
1191 | |
1192 | free(filter); |
1193 | return ret; |
1194 | } |
1195 | |
1196 | int evlist__set_tp_filter_pid(struct evlist *evlist, pid_t pid) |
1197 | { |
1198 | return evlist__set_tp_filter_pids(evlist, npids: 1, pids: &pid); |
1199 | } |
1200 | |
1201 | int evlist__append_tp_filter_pids(struct evlist *evlist, size_t npids, pid_t *pids) |
1202 | { |
1203 | char *filter = asprintf__tp_filter_pids(npids, pids); |
1204 | int ret = evlist__append_tp_filter(evlist, filter); |
1205 | |
1206 | free(filter); |
1207 | return ret; |
1208 | } |
1209 | |
1210 | int evlist__append_tp_filter_pid(struct evlist *evlist, pid_t pid) |
1211 | { |
1212 | return evlist__append_tp_filter_pids(evlist, npids: 1, pids: &pid); |
1213 | } |
1214 | |
1215 | bool evlist__valid_sample_type(struct evlist *evlist) |
1216 | { |
1217 | struct evsel *pos; |
1218 | |
1219 | if (evlist->core.nr_entries == 1) |
1220 | return true; |
1221 | |
1222 | if (evlist->id_pos < 0 || evlist->is_pos < 0) |
1223 | return false; |
1224 | |
1225 | evlist__for_each_entry(evlist, pos) { |
1226 | if (pos->id_pos != evlist->id_pos || |
1227 | pos->is_pos != evlist->is_pos) |
1228 | return false; |
1229 | } |
1230 | |
1231 | return true; |
1232 | } |
1233 | |
1234 | u64 __evlist__combined_sample_type(struct evlist *evlist) |
1235 | { |
1236 | struct evsel *evsel; |
1237 | |
1238 | if (evlist->combined_sample_type) |
1239 | return evlist->combined_sample_type; |
1240 | |
1241 | evlist__for_each_entry(evlist, evsel) |
1242 | evlist->combined_sample_type |= evsel->core.attr.sample_type; |
1243 | |
1244 | return evlist->combined_sample_type; |
1245 | } |
1246 | |
1247 | u64 evlist__combined_sample_type(struct evlist *evlist) |
1248 | { |
1249 | evlist->combined_sample_type = 0; |
1250 | return __evlist__combined_sample_type(evlist); |
1251 | } |
1252 | |
1253 | u64 evlist__combined_branch_type(struct evlist *evlist) |
1254 | { |
1255 | struct evsel *evsel; |
1256 | u64 branch_type = 0; |
1257 | |
1258 | evlist__for_each_entry(evlist, evsel) |
1259 | branch_type |= evsel->core.attr.branch_sample_type; |
1260 | return branch_type; |
1261 | } |
1262 | |
1263 | bool evlist__valid_read_format(struct evlist *evlist) |
1264 | { |
1265 | struct evsel *first = evlist__first(evlist), *pos = first; |
1266 | u64 read_format = first->core.attr.read_format; |
1267 | u64 sample_type = first->core.attr.sample_type; |
1268 | |
1269 | evlist__for_each_entry(evlist, pos) { |
1270 | if (read_format != pos->core.attr.read_format) { |
1271 | pr_debug("Read format differs %#" PRIx64 " vs %#" PRIx64 "\n" , |
1272 | read_format, (u64)pos->core.attr.read_format); |
1273 | } |
1274 | } |
1275 | |
1276 | /* PERF_SAMPLE_READ implies PERF_FORMAT_ID. */ |
1277 | if ((sample_type & PERF_SAMPLE_READ) && |
1278 | !(read_format & PERF_FORMAT_ID)) { |
1279 | return false; |
1280 | } |
1281 | |
1282 | return true; |
1283 | } |
1284 | |
1285 | u16 evlist__id_hdr_size(struct evlist *evlist) |
1286 | { |
1287 | struct evsel *first = evlist__first(evlist); |
1288 | |
1289 | return first->core.attr.sample_id_all ? evsel__id_hdr_size(evsel: first) : 0; |
1290 | } |
1291 | |
1292 | bool evlist__valid_sample_id_all(struct evlist *evlist) |
1293 | { |
1294 | struct evsel *first = evlist__first(evlist), *pos = first; |
1295 | |
1296 | evlist__for_each_entry_continue(evlist, pos) { |
1297 | if (first->core.attr.sample_id_all != pos->core.attr.sample_id_all) |
1298 | return false; |
1299 | } |
1300 | |
1301 | return true; |
1302 | } |
1303 | |
1304 | bool evlist__sample_id_all(struct evlist *evlist) |
1305 | { |
1306 | struct evsel *first = evlist__first(evlist); |
1307 | return first->core.attr.sample_id_all; |
1308 | } |
1309 | |
1310 | void evlist__set_selected(struct evlist *evlist, struct evsel *evsel) |
1311 | { |
1312 | evlist->selected = evsel; |
1313 | } |
1314 | |
1315 | void evlist__close(struct evlist *evlist) |
1316 | { |
1317 | struct evsel *evsel; |
1318 | struct evlist_cpu_iterator evlist_cpu_itr; |
1319 | struct affinity affinity; |
1320 | |
1321 | /* |
1322 | * With perf record core.user_requested_cpus is usually NULL. |
1323 | * Use the old method to handle this for now. |
1324 | */ |
1325 | if (!evlist->core.user_requested_cpus || |
1326 | cpu_map__is_dummy(cpus: evlist->core.user_requested_cpus)) { |
1327 | evlist__for_each_entry_reverse(evlist, evsel) |
1328 | evsel__close(evsel); |
1329 | return; |
1330 | } |
1331 | |
1332 | if (affinity__setup(a: &affinity) < 0) |
1333 | return; |
1334 | |
1335 | evlist__for_each_cpu(evlist_cpu_itr, evlist, &affinity) { |
1336 | perf_evsel__close_cpu(&evlist_cpu_itr.evsel->core, |
1337 | evlist_cpu_itr.cpu_map_idx); |
1338 | } |
1339 | |
1340 | affinity__cleanup(a: &affinity); |
1341 | evlist__for_each_entry_reverse(evlist, evsel) { |
1342 | perf_evsel__free_fd(&evsel->core); |
1343 | perf_evsel__free_id(&evsel->core); |
1344 | } |
1345 | perf_evlist__reset_id_hash(&evlist->core); |
1346 | } |
1347 | |
1348 | static int evlist__create_syswide_maps(struct evlist *evlist) |
1349 | { |
1350 | struct perf_cpu_map *cpus; |
1351 | struct perf_thread_map *threads; |
1352 | |
1353 | /* |
1354 | * Try reading /sys/devices/system/cpu/online to get |
1355 | * an all cpus map. |
1356 | * |
1357 | * FIXME: -ENOMEM is the best we can do here, the cpu_map |
1358 | * code needs an overhaul to properly forward the |
1359 | * error, and we may not want to do that fallback to a |
1360 | * default cpu identity map :-\ |
1361 | */ |
1362 | cpus = perf_cpu_map__new_online_cpus(); |
1363 | if (!cpus) |
1364 | goto out; |
1365 | |
1366 | threads = perf_thread_map__new_dummy(); |
1367 | if (!threads) |
1368 | goto out_put; |
1369 | |
1370 | perf_evlist__set_maps(&evlist->core, cpus, threads); |
1371 | |
1372 | perf_thread_map__put(threads); |
1373 | out_put: |
1374 | perf_cpu_map__put(cpus); |
1375 | out: |
1376 | return -ENOMEM; |
1377 | } |
1378 | |
1379 | int evlist__open(struct evlist *evlist) |
1380 | { |
1381 | struct evsel *evsel; |
1382 | int err; |
1383 | |
1384 | /* |
1385 | * Default: one fd per CPU, all threads, aka systemwide |
1386 | * as sys_perf_event_open(cpu = -1, thread = -1) is EINVAL |
1387 | */ |
1388 | if (evlist->core.threads == NULL && evlist->core.user_requested_cpus == NULL) { |
1389 | err = evlist__create_syswide_maps(evlist); |
1390 | if (err < 0) |
1391 | goto out_err; |
1392 | } |
1393 | |
1394 | evlist__update_id_pos(evlist); |
1395 | |
1396 | evlist__for_each_entry(evlist, evsel) { |
1397 | err = evsel__open(evsel, cpus: evsel->core.cpus, threads: evsel->core.threads); |
1398 | if (err < 0) |
1399 | goto out_err; |
1400 | } |
1401 | |
1402 | return 0; |
1403 | out_err: |
1404 | evlist__close(evlist); |
1405 | errno = -err; |
1406 | return err; |
1407 | } |
1408 | |
1409 | int evlist__prepare_workload(struct evlist *evlist, struct target *target, const char *argv[], |
1410 | bool pipe_output, void (*exec_error)(int signo, siginfo_t *info, void *ucontext)) |
1411 | { |
1412 | int child_ready_pipe[2], go_pipe[2]; |
1413 | char bf; |
1414 | |
1415 | if (pipe(child_ready_pipe) < 0) { |
1416 | perror("failed to create 'ready' pipe" ); |
1417 | return -1; |
1418 | } |
1419 | |
1420 | if (pipe(go_pipe) < 0) { |
1421 | perror("failed to create 'go' pipe" ); |
1422 | goto out_close_ready_pipe; |
1423 | } |
1424 | |
1425 | evlist->workload.pid = fork(); |
1426 | if (evlist->workload.pid < 0) { |
1427 | perror("failed to fork" ); |
1428 | goto out_close_pipes; |
1429 | } |
1430 | |
1431 | if (!evlist->workload.pid) { |
1432 | int ret; |
1433 | |
1434 | if (pipe_output) |
1435 | dup2(2, 1); |
1436 | |
1437 | signal(SIGTERM, SIG_DFL); |
1438 | |
1439 | close(child_ready_pipe[0]); |
1440 | close(go_pipe[1]); |
1441 | fcntl(go_pipe[0], F_SETFD, FD_CLOEXEC); |
1442 | |
1443 | /* |
1444 | * Change the name of this process not to confuse --exclude-perf users |
1445 | * that sees 'perf' in the window up to the execvp() and thinks that |
1446 | * perf samples are not being excluded. |
1447 | */ |
1448 | prctl(PR_SET_NAME, "perf-exec" ); |
1449 | |
1450 | /* |
1451 | * Tell the parent we're ready to go |
1452 | */ |
1453 | close(child_ready_pipe[1]); |
1454 | |
1455 | /* |
1456 | * Wait until the parent tells us to go. |
1457 | */ |
1458 | ret = read(go_pipe[0], &bf, 1); |
1459 | /* |
1460 | * The parent will ask for the execvp() to be performed by |
1461 | * writing exactly one byte, in workload.cork_fd, usually via |
1462 | * evlist__start_workload(). |
1463 | * |
1464 | * For cancelling the workload without actually running it, |
1465 | * the parent will just close workload.cork_fd, without writing |
1466 | * anything, i.e. read will return zero and we just exit() |
1467 | * here. |
1468 | */ |
1469 | if (ret != 1) { |
1470 | if (ret == -1) |
1471 | perror("unable to read pipe" ); |
1472 | exit(ret); |
1473 | } |
1474 | |
1475 | execvp(argv[0], (char **)argv); |
1476 | |
1477 | if (exec_error) { |
1478 | union sigval val; |
1479 | |
1480 | val.sival_int = errno; |
1481 | if (sigqueue(getppid(), SIGUSR1, val)) |
1482 | perror(argv[0]); |
1483 | } else |
1484 | perror(argv[0]); |
1485 | exit(-1); |
1486 | } |
1487 | |
1488 | if (exec_error) { |
1489 | struct sigaction act = { |
1490 | .sa_flags = SA_SIGINFO, |
1491 | .sa_sigaction = exec_error, |
1492 | }; |
1493 | sigaction(SIGUSR1, &act, NULL); |
1494 | } |
1495 | |
1496 | if (target__none(target)) { |
1497 | if (evlist->core.threads == NULL) { |
1498 | fprintf(stderr, "FATAL: evlist->threads need to be set at this point (%s:%d).\n" , |
1499 | __func__, __LINE__); |
1500 | goto out_close_pipes; |
1501 | } |
1502 | perf_thread_map__set_pid(evlist->core.threads, 0, evlist->workload.pid); |
1503 | } |
1504 | |
1505 | close(child_ready_pipe[1]); |
1506 | close(go_pipe[0]); |
1507 | /* |
1508 | * wait for child to settle |
1509 | */ |
1510 | if (read(child_ready_pipe[0], &bf, 1) == -1) { |
1511 | perror("unable to read pipe" ); |
1512 | goto out_close_pipes; |
1513 | } |
1514 | |
1515 | fcntl(go_pipe[1], F_SETFD, FD_CLOEXEC); |
1516 | evlist->workload.cork_fd = go_pipe[1]; |
1517 | close(child_ready_pipe[0]); |
1518 | return 0; |
1519 | |
1520 | out_close_pipes: |
1521 | close(go_pipe[0]); |
1522 | close(go_pipe[1]); |
1523 | out_close_ready_pipe: |
1524 | close(child_ready_pipe[0]); |
1525 | close(child_ready_pipe[1]); |
1526 | return -1; |
1527 | } |
1528 | |
1529 | int evlist__start_workload(struct evlist *evlist) |
1530 | { |
1531 | if (evlist->workload.cork_fd > 0) { |
1532 | char bf = 0; |
1533 | int ret; |
1534 | /* |
1535 | * Remove the cork, let it rip! |
1536 | */ |
1537 | ret = write(evlist->workload.cork_fd, &bf, 1); |
1538 | if (ret < 0) |
1539 | perror("unable to write to pipe" ); |
1540 | |
1541 | close(evlist->workload.cork_fd); |
1542 | return ret; |
1543 | } |
1544 | |
1545 | return 0; |
1546 | } |
1547 | |
1548 | int evlist__parse_sample(struct evlist *evlist, union perf_event *event, struct perf_sample *sample) |
1549 | { |
1550 | struct evsel *evsel = evlist__event2evsel(evlist, event); |
1551 | int ret; |
1552 | |
1553 | if (!evsel) |
1554 | return -EFAULT; |
1555 | ret = evsel__parse_sample(evsel, event, sample); |
1556 | if (ret) |
1557 | return ret; |
1558 | if (perf_guest && sample->id) { |
1559 | struct perf_sample_id *sid = evlist__id2sid(evlist, id: sample->id); |
1560 | |
1561 | if (sid) { |
1562 | sample->machine_pid = sid->machine_pid; |
1563 | sample->vcpu = sid->vcpu.cpu; |
1564 | } |
1565 | } |
1566 | return 0; |
1567 | } |
1568 | |
1569 | int evlist__parse_sample_timestamp(struct evlist *evlist, union perf_event *event, u64 *timestamp) |
1570 | { |
1571 | struct evsel *evsel = evlist__event2evsel(evlist, event); |
1572 | |
1573 | if (!evsel) |
1574 | return -EFAULT; |
1575 | return evsel__parse_sample_timestamp(evsel, event, timestamp); |
1576 | } |
1577 | |
1578 | int evlist__strerror_open(struct evlist *evlist, int err, char *buf, size_t size) |
1579 | { |
1580 | int printed, value; |
1581 | char sbuf[STRERR_BUFSIZE], *emsg = str_error_r(err, sbuf, sizeof(sbuf)); |
1582 | |
1583 | switch (err) { |
1584 | case EACCES: |
1585 | case EPERM: |
1586 | printed = scnprintf(buf, size, |
1587 | fmt: "Error:\t%s.\n" |
1588 | "Hint:\tCheck /proc/sys/kernel/perf_event_paranoid setting." , emsg); |
1589 | |
1590 | value = perf_event_paranoid(); |
1591 | |
1592 | printed += scnprintf(buf: buf + printed, size: size - printed, fmt: "\nHint:\t" ); |
1593 | |
1594 | if (value >= 2) { |
1595 | printed += scnprintf(buf: buf + printed, size: size - printed, |
1596 | fmt: "For your workloads it needs to be <= 1\nHint:\t" ); |
1597 | } |
1598 | printed += scnprintf(buf: buf + printed, size: size - printed, |
1599 | fmt: "For system wide tracing it needs to be set to -1.\n" ); |
1600 | |
1601 | printed += scnprintf(buf: buf + printed, size: size - printed, |
1602 | fmt: "Hint:\tTry: 'sudo sh -c \"echo -1 > /proc/sys/kernel/perf_event_paranoid\"'\n" |
1603 | "Hint:\tThe current value is %d." , value); |
1604 | break; |
1605 | case EINVAL: { |
1606 | struct evsel *first = evlist__first(evlist); |
1607 | int max_freq; |
1608 | |
1609 | if (sysctl__read_int("kernel/perf_event_max_sample_rate" , &max_freq) < 0) |
1610 | goto out_default; |
1611 | |
1612 | if (first->core.attr.sample_freq < (u64)max_freq) |
1613 | goto out_default; |
1614 | |
1615 | printed = scnprintf(buf, size, |
1616 | "Error:\t%s.\n" |
1617 | "Hint:\tCheck /proc/sys/kernel/perf_event_max_sample_rate.\n" |
1618 | "Hint:\tThe current value is %d and %" PRIu64 " is being requested." , |
1619 | emsg, max_freq, first->core.attr.sample_freq); |
1620 | break; |
1621 | } |
1622 | default: |
1623 | out_default: |
1624 | scnprintf(buf, size, fmt: "%s" , emsg); |
1625 | break; |
1626 | } |
1627 | |
1628 | return 0; |
1629 | } |
1630 | |
1631 | int evlist__strerror_mmap(struct evlist *evlist, int err, char *buf, size_t size) |
1632 | { |
1633 | char sbuf[STRERR_BUFSIZE], *emsg = str_error_r(err, sbuf, sizeof(sbuf)); |
1634 | int pages_attempted = evlist->core.mmap_len / 1024, pages_max_per_user, printed = 0; |
1635 | |
1636 | switch (err) { |
1637 | case EPERM: |
1638 | sysctl__read_int("kernel/perf_event_mlock_kb" , &pages_max_per_user); |
1639 | printed += scnprintf(buf: buf + printed, size: size - printed, |
1640 | fmt: "Error:\t%s.\n" |
1641 | "Hint:\tCheck /proc/sys/kernel/perf_event_mlock_kb (%d kB) setting.\n" |
1642 | "Hint:\tTried using %zd kB.\n" , |
1643 | emsg, pages_max_per_user, pages_attempted); |
1644 | |
1645 | if (pages_attempted >= pages_max_per_user) { |
1646 | printed += scnprintf(buf: buf + printed, size: size - printed, |
1647 | fmt: "Hint:\tTry 'sudo sh -c \"echo %d > /proc/sys/kernel/perf_event_mlock_kb\"', or\n" , |
1648 | pages_max_per_user + pages_attempted); |
1649 | } |
1650 | |
1651 | printed += scnprintf(buf: buf + printed, size: size - printed, |
1652 | fmt: "Hint:\tTry using a smaller -m/--mmap-pages value." ); |
1653 | break; |
1654 | default: |
1655 | scnprintf(buf, size, fmt: "%s" , emsg); |
1656 | break; |
1657 | } |
1658 | |
1659 | return 0; |
1660 | } |
1661 | |
1662 | void evlist__to_front(struct evlist *evlist, struct evsel *move_evsel) |
1663 | { |
1664 | struct evsel *evsel, *n; |
1665 | LIST_HEAD(move); |
1666 | |
1667 | if (move_evsel == evlist__first(evlist)) |
1668 | return; |
1669 | |
1670 | evlist__for_each_entry_safe(evlist, n, evsel) { |
1671 | if (evsel__leader(evsel) == evsel__leader(evsel: move_evsel)) |
1672 | list_move_tail(list: &evsel->core.node, head: &move); |
1673 | } |
1674 | |
1675 | list_splice(list: &move, head: &evlist->core.entries); |
1676 | } |
1677 | |
1678 | struct evsel *evlist__get_tracking_event(struct evlist *evlist) |
1679 | { |
1680 | struct evsel *evsel; |
1681 | |
1682 | evlist__for_each_entry(evlist, evsel) { |
1683 | if (evsel->tracking) |
1684 | return evsel; |
1685 | } |
1686 | |
1687 | return evlist__first(evlist); |
1688 | } |
1689 | |
1690 | void evlist__set_tracking_event(struct evlist *evlist, struct evsel *tracking_evsel) |
1691 | { |
1692 | struct evsel *evsel; |
1693 | |
1694 | if (tracking_evsel->tracking) |
1695 | return; |
1696 | |
1697 | evlist__for_each_entry(evlist, evsel) { |
1698 | if (evsel != tracking_evsel) |
1699 | evsel->tracking = false; |
1700 | } |
1701 | |
1702 | tracking_evsel->tracking = true; |
1703 | } |
1704 | |
1705 | struct evsel *evlist__findnew_tracking_event(struct evlist *evlist, bool system_wide) |
1706 | { |
1707 | struct evsel *evsel; |
1708 | |
1709 | evsel = evlist__get_tracking_event(evlist); |
1710 | if (!evsel__is_dummy_event(evsel)) { |
1711 | evsel = evlist__add_aux_dummy(evlist, system_wide); |
1712 | if (!evsel) |
1713 | return NULL; |
1714 | |
1715 | evlist__set_tracking_event(evlist, tracking_evsel: evsel); |
1716 | } else if (system_wide) { |
1717 | perf_evlist__go_system_wide(&evlist->core, &evsel->core); |
1718 | } |
1719 | |
1720 | return evsel; |
1721 | } |
1722 | |
1723 | struct evsel *evlist__find_evsel_by_str(struct evlist *evlist, const char *str) |
1724 | { |
1725 | struct evsel *evsel; |
1726 | |
1727 | evlist__for_each_entry(evlist, evsel) { |
1728 | if (!evsel->name) |
1729 | continue; |
1730 | if (evsel__name_is(evsel, name: str)) |
1731 | return evsel; |
1732 | } |
1733 | |
1734 | return NULL; |
1735 | } |
1736 | |
1737 | void evlist__toggle_bkw_mmap(struct evlist *evlist, enum bkw_mmap_state state) |
1738 | { |
1739 | enum bkw_mmap_state old_state = evlist->bkw_mmap_state; |
1740 | enum action { |
1741 | NONE, |
1742 | PAUSE, |
1743 | RESUME, |
1744 | } action = NONE; |
1745 | |
1746 | if (!evlist->overwrite_mmap) |
1747 | return; |
1748 | |
1749 | switch (old_state) { |
1750 | case BKW_MMAP_NOTREADY: { |
1751 | if (state != BKW_MMAP_RUNNING) |
1752 | goto state_err; |
1753 | break; |
1754 | } |
1755 | case BKW_MMAP_RUNNING: { |
1756 | if (state != BKW_MMAP_DATA_PENDING) |
1757 | goto state_err; |
1758 | action = PAUSE; |
1759 | break; |
1760 | } |
1761 | case BKW_MMAP_DATA_PENDING: { |
1762 | if (state != BKW_MMAP_EMPTY) |
1763 | goto state_err; |
1764 | break; |
1765 | } |
1766 | case BKW_MMAP_EMPTY: { |
1767 | if (state != BKW_MMAP_RUNNING) |
1768 | goto state_err; |
1769 | action = RESUME; |
1770 | break; |
1771 | } |
1772 | default: |
1773 | WARN_ONCE(1, "Shouldn't get there\n" ); |
1774 | } |
1775 | |
1776 | evlist->bkw_mmap_state = state; |
1777 | |
1778 | switch (action) { |
1779 | case PAUSE: |
1780 | evlist__pause(evlist); |
1781 | break; |
1782 | case RESUME: |
1783 | evlist__resume(evlist); |
1784 | break; |
1785 | case NONE: |
1786 | default: |
1787 | break; |
1788 | } |
1789 | |
1790 | state_err: |
1791 | return; |
1792 | } |
1793 | |
1794 | bool evlist__exclude_kernel(struct evlist *evlist) |
1795 | { |
1796 | struct evsel *evsel; |
1797 | |
1798 | evlist__for_each_entry(evlist, evsel) { |
1799 | if (!evsel->core.attr.exclude_kernel) |
1800 | return false; |
1801 | } |
1802 | |
1803 | return true; |
1804 | } |
1805 | |
1806 | /* |
1807 | * Events in data file are not collect in groups, but we still want |
1808 | * the group display. Set the artificial group and set the leader's |
1809 | * forced_leader flag to notify the display code. |
1810 | */ |
1811 | void evlist__force_leader(struct evlist *evlist) |
1812 | { |
1813 | if (evlist__nr_groups(evlist) == 0) { |
1814 | struct evsel *leader = evlist__first(evlist); |
1815 | |
1816 | evlist__set_leader(evlist); |
1817 | leader->forced_leader = true; |
1818 | } |
1819 | } |
1820 | |
1821 | struct evsel *evlist__reset_weak_group(struct evlist *evsel_list, struct evsel *evsel, bool close) |
1822 | { |
1823 | struct evsel *c2, *leader; |
1824 | bool is_open = true; |
1825 | |
1826 | leader = evsel__leader(evsel); |
1827 | |
1828 | pr_debug("Weak group for %s/%d failed\n" , |
1829 | leader->name, leader->core.nr_members); |
1830 | |
1831 | /* |
1832 | * for_each_group_member doesn't work here because it doesn't |
1833 | * include the first entry. |
1834 | */ |
1835 | evlist__for_each_entry(evsel_list, c2) { |
1836 | if (c2 == evsel) |
1837 | is_open = false; |
1838 | if (evsel__has_leader(evsel: c2, leader)) { |
1839 | if (is_open && close) |
1840 | perf_evsel__close(&c2->core); |
1841 | /* |
1842 | * We want to close all members of the group and reopen |
1843 | * them. Some events, like Intel topdown, require being |
1844 | * in a group and so keep these in the group. |
1845 | */ |
1846 | evsel__remove_from_group(evsel: c2, leader); |
1847 | |
1848 | /* |
1849 | * Set this for all former members of the group |
1850 | * to indicate they get reopened. |
1851 | */ |
1852 | c2->reset_group = true; |
1853 | } |
1854 | } |
1855 | /* Reset the leader count if all entries were removed. */ |
1856 | if (leader->core.nr_members == 1) |
1857 | leader->core.nr_members = 0; |
1858 | return leader; |
1859 | } |
1860 | |
1861 | static int evlist__parse_control_fifo(const char *str, int *ctl_fd, int *ctl_fd_ack, bool *ctl_fd_close) |
1862 | { |
1863 | char *s, *p; |
1864 | int ret = 0, fd; |
1865 | |
1866 | if (strncmp(str, "fifo:" , 5)) |
1867 | return -EINVAL; |
1868 | |
1869 | str += 5; |
1870 | if (!*str || *str == ',') |
1871 | return -EINVAL; |
1872 | |
1873 | s = strdup(str); |
1874 | if (!s) |
1875 | return -ENOMEM; |
1876 | |
1877 | p = strchr(s, ','); |
1878 | if (p) |
1879 | *p = '\0'; |
1880 | |
1881 | /* |
1882 | * O_RDWR avoids POLLHUPs which is necessary to allow the other |
1883 | * end of a FIFO to be repeatedly opened and closed. |
1884 | */ |
1885 | fd = open(s, O_RDWR | O_NONBLOCK | O_CLOEXEC); |
1886 | if (fd < 0) { |
1887 | pr_err("Failed to open '%s'\n" , s); |
1888 | ret = -errno; |
1889 | goto out_free; |
1890 | } |
1891 | *ctl_fd = fd; |
1892 | *ctl_fd_close = true; |
1893 | |
1894 | if (p && *++p) { |
1895 | /* O_RDWR | O_NONBLOCK means the other end need not be open */ |
1896 | fd = open(p, O_RDWR | O_NONBLOCK | O_CLOEXEC); |
1897 | if (fd < 0) { |
1898 | pr_err("Failed to open '%s'\n" , p); |
1899 | ret = -errno; |
1900 | goto out_free; |
1901 | } |
1902 | *ctl_fd_ack = fd; |
1903 | } |
1904 | |
1905 | out_free: |
1906 | free(s); |
1907 | return ret; |
1908 | } |
1909 | |
1910 | int evlist__parse_control(const char *str, int *ctl_fd, int *ctl_fd_ack, bool *ctl_fd_close) |
1911 | { |
1912 | char *comma = NULL, *endptr = NULL; |
1913 | |
1914 | *ctl_fd_close = false; |
1915 | |
1916 | if (strncmp(str, "fd:" , 3)) |
1917 | return evlist__parse_control_fifo(str, ctl_fd, ctl_fd_ack, ctl_fd_close); |
1918 | |
1919 | *ctl_fd = strtoul(&str[3], &endptr, 0); |
1920 | if (endptr == &str[3]) |
1921 | return -EINVAL; |
1922 | |
1923 | comma = strchr(str, ','); |
1924 | if (comma) { |
1925 | if (endptr != comma) |
1926 | return -EINVAL; |
1927 | |
1928 | *ctl_fd_ack = strtoul(comma + 1, &endptr, 0); |
1929 | if (endptr == comma + 1 || *endptr != '\0') |
1930 | return -EINVAL; |
1931 | } |
1932 | |
1933 | return 0; |
1934 | } |
1935 | |
1936 | void evlist__close_control(int ctl_fd, int ctl_fd_ack, bool *ctl_fd_close) |
1937 | { |
1938 | if (*ctl_fd_close) { |
1939 | *ctl_fd_close = false; |
1940 | close(ctl_fd); |
1941 | if (ctl_fd_ack >= 0) |
1942 | close(ctl_fd_ack); |
1943 | } |
1944 | } |
1945 | |
1946 | int evlist__initialize_ctlfd(struct evlist *evlist, int fd, int ack) |
1947 | { |
1948 | if (fd == -1) { |
1949 | pr_debug("Control descriptor is not initialized\n" ); |
1950 | return 0; |
1951 | } |
1952 | |
1953 | evlist->ctl_fd.pos = perf_evlist__add_pollfd(&evlist->core, fd, NULL, POLLIN, |
1954 | fdarray_flag__nonfilterable | |
1955 | fdarray_flag__non_perf_event); |
1956 | if (evlist->ctl_fd.pos < 0) { |
1957 | evlist->ctl_fd.pos = -1; |
1958 | pr_err("Failed to add ctl fd entry: %m\n" ); |
1959 | return -1; |
1960 | } |
1961 | |
1962 | evlist->ctl_fd.fd = fd; |
1963 | evlist->ctl_fd.ack = ack; |
1964 | |
1965 | return 0; |
1966 | } |
1967 | |
1968 | bool evlist__ctlfd_initialized(struct evlist *evlist) |
1969 | { |
1970 | return evlist->ctl_fd.pos >= 0; |
1971 | } |
1972 | |
1973 | int evlist__finalize_ctlfd(struct evlist *evlist) |
1974 | { |
1975 | struct pollfd *entries = evlist->core.pollfd.entries; |
1976 | |
1977 | if (!evlist__ctlfd_initialized(evlist)) |
1978 | return 0; |
1979 | |
1980 | entries[evlist->ctl_fd.pos].fd = -1; |
1981 | entries[evlist->ctl_fd.pos].events = 0; |
1982 | entries[evlist->ctl_fd.pos].revents = 0; |
1983 | |
1984 | evlist->ctl_fd.pos = -1; |
1985 | evlist->ctl_fd.ack = -1; |
1986 | evlist->ctl_fd.fd = -1; |
1987 | |
1988 | return 0; |
1989 | } |
1990 | |
1991 | static int evlist__ctlfd_recv(struct evlist *evlist, enum evlist_ctl_cmd *cmd, |
1992 | char *cmd_data, size_t data_size) |
1993 | { |
1994 | int err; |
1995 | char c; |
1996 | size_t bytes_read = 0; |
1997 | |
1998 | *cmd = EVLIST_CTL_CMD_UNSUPPORTED; |
1999 | memset(cmd_data, 0, data_size); |
2000 | data_size--; |
2001 | |
2002 | do { |
2003 | err = read(evlist->ctl_fd.fd, &c, 1); |
2004 | if (err > 0) { |
2005 | if (c == '\n' || c == '\0') |
2006 | break; |
2007 | cmd_data[bytes_read++] = c; |
2008 | if (bytes_read == data_size) |
2009 | break; |
2010 | continue; |
2011 | } else if (err == -1) { |
2012 | if (errno == EINTR) |
2013 | continue; |
2014 | if (errno == EAGAIN || errno == EWOULDBLOCK) |
2015 | err = 0; |
2016 | else |
2017 | pr_err("Failed to read from ctlfd %d: %m\n" , evlist->ctl_fd.fd); |
2018 | } |
2019 | break; |
2020 | } while (1); |
2021 | |
2022 | pr_debug("Message from ctl_fd: \"%s%s\"\n" , cmd_data, |
2023 | bytes_read == data_size ? "" : c == '\n' ? "\\n" : "\\0" ); |
2024 | |
2025 | if (bytes_read > 0) { |
2026 | if (!strncmp(cmd_data, EVLIST_CTL_CMD_ENABLE_TAG, |
2027 | (sizeof(EVLIST_CTL_CMD_ENABLE_TAG)-1))) { |
2028 | *cmd = EVLIST_CTL_CMD_ENABLE; |
2029 | } else if (!strncmp(cmd_data, EVLIST_CTL_CMD_DISABLE_TAG, |
2030 | (sizeof(EVLIST_CTL_CMD_DISABLE_TAG)-1))) { |
2031 | *cmd = EVLIST_CTL_CMD_DISABLE; |
2032 | } else if (!strncmp(cmd_data, EVLIST_CTL_CMD_SNAPSHOT_TAG, |
2033 | (sizeof(EVLIST_CTL_CMD_SNAPSHOT_TAG)-1))) { |
2034 | *cmd = EVLIST_CTL_CMD_SNAPSHOT; |
2035 | pr_debug("is snapshot\n" ); |
2036 | } else if (!strncmp(cmd_data, EVLIST_CTL_CMD_EVLIST_TAG, |
2037 | (sizeof(EVLIST_CTL_CMD_EVLIST_TAG)-1))) { |
2038 | *cmd = EVLIST_CTL_CMD_EVLIST; |
2039 | } else if (!strncmp(cmd_data, EVLIST_CTL_CMD_STOP_TAG, |
2040 | (sizeof(EVLIST_CTL_CMD_STOP_TAG)-1))) { |
2041 | *cmd = EVLIST_CTL_CMD_STOP; |
2042 | } else if (!strncmp(cmd_data, EVLIST_CTL_CMD_PING_TAG, |
2043 | (sizeof(EVLIST_CTL_CMD_PING_TAG)-1))) { |
2044 | *cmd = EVLIST_CTL_CMD_PING; |
2045 | } |
2046 | } |
2047 | |
2048 | return bytes_read ? (int)bytes_read : err; |
2049 | } |
2050 | |
2051 | int evlist__ctlfd_ack(struct evlist *evlist) |
2052 | { |
2053 | int err; |
2054 | |
2055 | if (evlist->ctl_fd.ack == -1) |
2056 | return 0; |
2057 | |
2058 | err = write(evlist->ctl_fd.ack, EVLIST_CTL_CMD_ACK_TAG, |
2059 | sizeof(EVLIST_CTL_CMD_ACK_TAG)); |
2060 | if (err == -1) |
2061 | pr_err("failed to write to ctl_ack_fd %d: %m\n" , evlist->ctl_fd.ack); |
2062 | |
2063 | return err; |
2064 | } |
2065 | |
2066 | static int get_cmd_arg(char *cmd_data, size_t cmd_size, char **arg) |
2067 | { |
2068 | char *data = cmd_data + cmd_size; |
2069 | |
2070 | /* no argument */ |
2071 | if (!*data) |
2072 | return 0; |
2073 | |
2074 | /* there's argument */ |
2075 | if (*data == ' ') { |
2076 | *arg = data + 1; |
2077 | return 1; |
2078 | } |
2079 | |
2080 | /* malformed */ |
2081 | return -1; |
2082 | } |
2083 | |
2084 | static int evlist__ctlfd_enable(struct evlist *evlist, char *cmd_data, bool enable) |
2085 | { |
2086 | struct evsel *evsel; |
2087 | char *name; |
2088 | int err; |
2089 | |
2090 | err = get_cmd_arg(cmd_data, |
2091 | cmd_size: enable ? sizeof(EVLIST_CTL_CMD_ENABLE_TAG) - 1 : |
2092 | sizeof(EVLIST_CTL_CMD_DISABLE_TAG) - 1, |
2093 | arg: &name); |
2094 | if (err < 0) { |
2095 | pr_info("failed: wrong command\n" ); |
2096 | return -1; |
2097 | } |
2098 | |
2099 | if (err) { |
2100 | evsel = evlist__find_evsel_by_str(evlist, str: name); |
2101 | if (evsel) { |
2102 | if (enable) |
2103 | evlist__enable_evsel(evlist, evsel_name: name); |
2104 | else |
2105 | evlist__disable_evsel(evlist, evsel_name: name); |
2106 | pr_info("Event %s %s\n" , evsel->name, |
2107 | enable ? "enabled" : "disabled" ); |
2108 | } else { |
2109 | pr_info("failed: can't find '%s' event\n" , name); |
2110 | } |
2111 | } else { |
2112 | if (enable) { |
2113 | evlist__enable(evlist); |
2114 | pr_info(EVLIST_ENABLED_MSG); |
2115 | } else { |
2116 | evlist__disable(evlist); |
2117 | pr_info(EVLIST_DISABLED_MSG); |
2118 | } |
2119 | } |
2120 | |
2121 | return 0; |
2122 | } |
2123 | |
2124 | static int evlist__ctlfd_list(struct evlist *evlist, char *cmd_data) |
2125 | { |
2126 | struct perf_attr_details details = { .verbose = false, }; |
2127 | struct evsel *evsel; |
2128 | char *arg; |
2129 | int err; |
2130 | |
2131 | err = get_cmd_arg(cmd_data, |
2132 | cmd_size: sizeof(EVLIST_CTL_CMD_EVLIST_TAG) - 1, |
2133 | arg: &arg); |
2134 | if (err < 0) { |
2135 | pr_info("failed: wrong command\n" ); |
2136 | return -1; |
2137 | } |
2138 | |
2139 | if (err) { |
2140 | if (!strcmp(arg, "-v" )) { |
2141 | details.verbose = true; |
2142 | } else if (!strcmp(arg, "-g" )) { |
2143 | details.event_group = true; |
2144 | } else if (!strcmp(arg, "-F" )) { |
2145 | details.freq = true; |
2146 | } else { |
2147 | pr_info("failed: wrong command\n" ); |
2148 | return -1; |
2149 | } |
2150 | } |
2151 | |
2152 | evlist__for_each_entry(evlist, evsel) |
2153 | evsel__fprintf(evsel, &details, stderr); |
2154 | |
2155 | return 0; |
2156 | } |
2157 | |
2158 | int evlist__ctlfd_process(struct evlist *evlist, enum evlist_ctl_cmd *cmd) |
2159 | { |
2160 | int err = 0; |
2161 | char cmd_data[EVLIST_CTL_CMD_MAX_LEN]; |
2162 | int ctlfd_pos = evlist->ctl_fd.pos; |
2163 | struct pollfd *entries = evlist->core.pollfd.entries; |
2164 | |
2165 | if (!evlist__ctlfd_initialized(evlist) || !entries[ctlfd_pos].revents) |
2166 | return 0; |
2167 | |
2168 | if (entries[ctlfd_pos].revents & POLLIN) { |
2169 | err = evlist__ctlfd_recv(evlist, cmd, cmd_data, |
2170 | EVLIST_CTL_CMD_MAX_LEN); |
2171 | if (err > 0) { |
2172 | switch (*cmd) { |
2173 | case EVLIST_CTL_CMD_ENABLE: |
2174 | case EVLIST_CTL_CMD_DISABLE: |
2175 | err = evlist__ctlfd_enable(evlist, cmd_data, |
2176 | enable: *cmd == EVLIST_CTL_CMD_ENABLE); |
2177 | break; |
2178 | case EVLIST_CTL_CMD_EVLIST: |
2179 | err = evlist__ctlfd_list(evlist, cmd_data); |
2180 | break; |
2181 | case EVLIST_CTL_CMD_SNAPSHOT: |
2182 | case EVLIST_CTL_CMD_STOP: |
2183 | case EVLIST_CTL_CMD_PING: |
2184 | break; |
2185 | case EVLIST_CTL_CMD_ACK: |
2186 | case EVLIST_CTL_CMD_UNSUPPORTED: |
2187 | default: |
2188 | pr_debug("ctlfd: unsupported %d\n" , *cmd); |
2189 | break; |
2190 | } |
2191 | if (!(*cmd == EVLIST_CTL_CMD_ACK || *cmd == EVLIST_CTL_CMD_UNSUPPORTED || |
2192 | *cmd == EVLIST_CTL_CMD_SNAPSHOT)) |
2193 | evlist__ctlfd_ack(evlist); |
2194 | } |
2195 | } |
2196 | |
2197 | if (entries[ctlfd_pos].revents & (POLLHUP | POLLERR)) |
2198 | evlist__finalize_ctlfd(evlist); |
2199 | else |
2200 | entries[ctlfd_pos].revents = 0; |
2201 | |
2202 | return err; |
2203 | } |
2204 | |
2205 | /** |
2206 | * struct event_enable_time - perf record -D/--delay single time range. |
2207 | * @start: start of time range to enable events in milliseconds |
2208 | * @end: end of time range to enable events in milliseconds |
2209 | * |
2210 | * N.B. this structure is also accessed as an array of int. |
2211 | */ |
2212 | struct event_enable_time { |
2213 | int start; |
2214 | int end; |
2215 | }; |
2216 | |
2217 | static int parse_event_enable_time(const char *str, struct event_enable_time *range, bool first) |
2218 | { |
2219 | const char *fmt = first ? "%u - %u %n" : " , %u - %u %n" ; |
2220 | int ret, start, end, n; |
2221 | |
2222 | ret = sscanf(str, fmt, &start, &end, &n); |
2223 | if (ret != 2 || end <= start) |
2224 | return -EINVAL; |
2225 | if (range) { |
2226 | range->start = start; |
2227 | range->end = end; |
2228 | } |
2229 | return n; |
2230 | } |
2231 | |
2232 | static ssize_t parse_event_enable_times(const char *str, struct event_enable_time *range) |
2233 | { |
2234 | int incr = !!range; |
2235 | bool first = true; |
2236 | ssize_t ret, cnt; |
2237 | |
2238 | for (cnt = 0; *str; cnt++) { |
2239 | ret = parse_event_enable_time(str, range, first); |
2240 | if (ret < 0) |
2241 | return ret; |
2242 | /* Check no overlap */ |
2243 | if (!first && range && range->start <= range[-1].end) |
2244 | return -EINVAL; |
2245 | str += ret; |
2246 | range += incr; |
2247 | first = false; |
2248 | } |
2249 | return cnt; |
2250 | } |
2251 | |
2252 | /** |
2253 | * struct event_enable_timer - control structure for perf record -D/--delay. |
2254 | * @evlist: event list |
2255 | * @times: time ranges that events are enabled (N.B. this is also accessed as an |
2256 | * array of int) |
2257 | * @times_cnt: number of time ranges |
2258 | * @timerfd: timer file descriptor |
2259 | * @pollfd_pos: position in @evlist array of file descriptors to poll (fdarray) |
2260 | * @times_step: current position in (int *)@times)[], |
2261 | * refer event_enable_timer__process() |
2262 | * |
2263 | * Note, this structure is only used when there are time ranges, not when there |
2264 | * is only an initial delay. |
2265 | */ |
2266 | struct event_enable_timer { |
2267 | struct evlist *evlist; |
2268 | struct event_enable_time *times; |
2269 | size_t times_cnt; |
2270 | int timerfd; |
2271 | int pollfd_pos; |
2272 | size_t times_step; |
2273 | }; |
2274 | |
2275 | static int str_to_delay(const char *str) |
2276 | { |
2277 | char *endptr; |
2278 | long d; |
2279 | |
2280 | d = strtol(str, &endptr, 10); |
2281 | if (*endptr || d > INT_MAX || d < -1) |
2282 | return 0; |
2283 | return d; |
2284 | } |
2285 | |
2286 | int evlist__parse_event_enable_time(struct evlist *evlist, struct record_opts *opts, |
2287 | const char *str, int unset) |
2288 | { |
2289 | enum fdarray_flags flags = fdarray_flag__nonfilterable | fdarray_flag__non_perf_event; |
2290 | struct event_enable_timer *eet; |
2291 | ssize_t times_cnt; |
2292 | ssize_t ret; |
2293 | int err; |
2294 | |
2295 | if (unset) |
2296 | return 0; |
2297 | |
2298 | opts->target.initial_delay = str_to_delay(str); |
2299 | if (opts->target.initial_delay) |
2300 | return 0; |
2301 | |
2302 | ret = parse_event_enable_times(str, NULL); |
2303 | if (ret < 0) |
2304 | return ret; |
2305 | |
2306 | times_cnt = ret; |
2307 | if (times_cnt == 0) |
2308 | return -EINVAL; |
2309 | |
2310 | eet = zalloc(sizeof(*eet)); |
2311 | if (!eet) |
2312 | return -ENOMEM; |
2313 | |
2314 | eet->times = calloc(times_cnt, sizeof(*eet->times)); |
2315 | if (!eet->times) { |
2316 | err = -ENOMEM; |
2317 | goto free_eet; |
2318 | } |
2319 | |
2320 | if (parse_event_enable_times(str, range: eet->times) != times_cnt) { |
2321 | err = -EINVAL; |
2322 | goto free_eet_times; |
2323 | } |
2324 | |
2325 | eet->times_cnt = times_cnt; |
2326 | |
2327 | eet->timerfd = timerfd_create(CLOCK_MONOTONIC, TFD_CLOEXEC); |
2328 | if (eet->timerfd == -1) { |
2329 | err = -errno; |
2330 | pr_err("timerfd_create failed: %s\n" , strerror(errno)); |
2331 | goto free_eet_times; |
2332 | } |
2333 | |
2334 | eet->pollfd_pos = perf_evlist__add_pollfd(&evlist->core, eet->timerfd, NULL, POLLIN, flags); |
2335 | if (eet->pollfd_pos < 0) { |
2336 | err = eet->pollfd_pos; |
2337 | goto close_timerfd; |
2338 | } |
2339 | |
2340 | eet->evlist = evlist; |
2341 | evlist->eet = eet; |
2342 | opts->target.initial_delay = eet->times[0].start; |
2343 | |
2344 | return 0; |
2345 | |
2346 | close_timerfd: |
2347 | close(eet->timerfd); |
2348 | free_eet_times: |
2349 | zfree(&eet->times); |
2350 | free_eet: |
2351 | free(eet); |
2352 | return err; |
2353 | } |
2354 | |
2355 | static int event_enable_timer__set_timer(struct event_enable_timer *eet, int ms) |
2356 | { |
2357 | struct itimerspec its = { |
2358 | .it_value.tv_sec = ms / MSEC_PER_SEC, |
2359 | .it_value.tv_nsec = (ms % MSEC_PER_SEC) * NSEC_PER_MSEC, |
2360 | }; |
2361 | int err = 0; |
2362 | |
2363 | if (timerfd_settime(eet->timerfd, 0, &its, NULL) < 0) { |
2364 | err = -errno; |
2365 | pr_err("timerfd_settime failed: %s\n" , strerror(errno)); |
2366 | } |
2367 | return err; |
2368 | } |
2369 | |
2370 | int event_enable_timer__start(struct event_enable_timer *eet) |
2371 | { |
2372 | int ms; |
2373 | |
2374 | if (!eet) |
2375 | return 0; |
2376 | |
2377 | ms = eet->times[0].end - eet->times[0].start; |
2378 | eet->times_step = 1; |
2379 | |
2380 | return event_enable_timer__set_timer(eet, ms); |
2381 | } |
2382 | |
2383 | int event_enable_timer__process(struct event_enable_timer *eet) |
2384 | { |
2385 | struct pollfd *entries; |
2386 | short revents; |
2387 | |
2388 | if (!eet) |
2389 | return 0; |
2390 | |
2391 | entries = eet->evlist->core.pollfd.entries; |
2392 | revents = entries[eet->pollfd_pos].revents; |
2393 | entries[eet->pollfd_pos].revents = 0; |
2394 | |
2395 | if (revents & POLLIN) { |
2396 | size_t step = eet->times_step; |
2397 | size_t pos = step / 2; |
2398 | |
2399 | if (step & 1) { |
2400 | evlist__disable_non_dummy(evlist: eet->evlist); |
2401 | pr_info(EVLIST_DISABLED_MSG); |
2402 | if (pos >= eet->times_cnt - 1) { |
2403 | /* Disarm timer */ |
2404 | event_enable_timer__set_timer(eet, ms: 0); |
2405 | return 1; /* Stop */ |
2406 | } |
2407 | } else { |
2408 | evlist__enable_non_dummy(evlist: eet->evlist); |
2409 | pr_info(EVLIST_ENABLED_MSG); |
2410 | } |
2411 | |
2412 | step += 1; |
2413 | pos = step / 2; |
2414 | |
2415 | if (pos < eet->times_cnt) { |
2416 | int *times = (int *)eet->times; /* Accessing 'times' as array of int */ |
2417 | int ms = times[step] - times[step - 1]; |
2418 | |
2419 | eet->times_step = step; |
2420 | return event_enable_timer__set_timer(eet, ms); |
2421 | } |
2422 | } |
2423 | |
2424 | return 0; |
2425 | } |
2426 | |
2427 | void event_enable_timer__exit(struct event_enable_timer **ep) |
2428 | { |
2429 | if (!ep || !*ep) |
2430 | return; |
2431 | zfree(&(*ep)->times); |
2432 | zfree(ep); |
2433 | } |
2434 | |
2435 | struct evsel *evlist__find_evsel(struct evlist *evlist, int idx) |
2436 | { |
2437 | struct evsel *evsel; |
2438 | |
2439 | evlist__for_each_entry(evlist, evsel) { |
2440 | if (evsel->core.idx == idx) |
2441 | return evsel; |
2442 | } |
2443 | return NULL; |
2444 | } |
2445 | |
2446 | int evlist__scnprintf_evsels(struct evlist *evlist, size_t size, char *bf) |
2447 | { |
2448 | struct evsel *evsel; |
2449 | int printed = 0; |
2450 | |
2451 | evlist__for_each_entry(evlist, evsel) { |
2452 | if (evsel__is_dummy_event(evsel)) |
2453 | continue; |
2454 | if (size > (strlen(evsel__name(evsel)) + (printed ? 2 : 1))) { |
2455 | printed += scnprintf(buf: bf + printed, size: size - printed, fmt: "%s%s" , printed ? "," : "" , evsel__name(evsel)); |
2456 | } else { |
2457 | printed += scnprintf(buf: bf + printed, size: size - printed, fmt: "%s..." , printed ? "," : "" ); |
2458 | break; |
2459 | } |
2460 | } |
2461 | |
2462 | return printed; |
2463 | } |
2464 | |
2465 | void evlist__check_mem_load_aux(struct evlist *evlist) |
2466 | { |
2467 | struct evsel *leader, *evsel, *pos; |
2468 | |
2469 | /* |
2470 | * For some platforms, the 'mem-loads' event is required to use |
2471 | * together with 'mem-loads-aux' within a group and 'mem-loads-aux' |
2472 | * must be the group leader. Now we disable this group before reporting |
2473 | * because 'mem-loads-aux' is just an auxiliary event. It doesn't carry |
2474 | * any valid memory load information. |
2475 | */ |
2476 | evlist__for_each_entry(evlist, evsel) { |
2477 | leader = evsel__leader(evsel); |
2478 | if (leader == evsel) |
2479 | continue; |
2480 | |
2481 | if (leader->name && strstr(leader->name, "mem-loads-aux" )) { |
2482 | for_each_group_evsel(pos, leader) { |
2483 | evsel__set_leader(evsel: pos, leader: pos); |
2484 | pos->core.nr_members = 0; |
2485 | } |
2486 | } |
2487 | } |
2488 | } |
2489 | |
2490 | /** |
2491 | * evlist__warn_user_requested_cpus() - Check each evsel against requested CPUs |
2492 | * and warn if the user CPU list is inapplicable for the event's PMU's |
2493 | * CPUs. Not core PMUs list a CPU in sysfs, but this may be overwritten by a |
2494 | * user requested CPU and so any online CPU is applicable. Core PMUs handle |
2495 | * events on the CPUs in their list and otherwise the event isn't supported. |
2496 | * @evlist: The list of events being checked. |
2497 | * @cpu_list: The user provided list of CPUs. |
2498 | */ |
2499 | void evlist__warn_user_requested_cpus(struct evlist *evlist, const char *cpu_list) |
2500 | { |
2501 | struct perf_cpu_map *user_requested_cpus; |
2502 | struct evsel *pos; |
2503 | |
2504 | if (!cpu_list) |
2505 | return; |
2506 | |
2507 | user_requested_cpus = perf_cpu_map__new(cpu_list); |
2508 | if (!user_requested_cpus) |
2509 | return; |
2510 | |
2511 | evlist__for_each_entry(evlist, pos) { |
2512 | struct perf_cpu_map *intersect, *to_test; |
2513 | const struct perf_pmu *pmu = evsel__find_pmu(evsel: pos); |
2514 | |
2515 | to_test = pmu && pmu->is_core ? pmu->cpus : cpu_map__online(); |
2516 | intersect = perf_cpu_map__intersect(to_test, user_requested_cpus); |
2517 | if (!perf_cpu_map__equal(intersect, user_requested_cpus)) { |
2518 | char buf[128]; |
2519 | |
2520 | cpu_map__snprint(map: to_test, buf, size: sizeof(buf)); |
2521 | pr_warning("WARNING: A requested CPU in '%s' is not supported by PMU '%s' (CPUs %s) for event '%s'\n" , |
2522 | cpu_list, pmu ? pmu->name : "cpu" , buf, evsel__name(pos)); |
2523 | } |
2524 | perf_cpu_map__put(intersect); |
2525 | } |
2526 | perf_cpu_map__put(user_requested_cpus); |
2527 | } |
2528 | |
2529 | void evlist__uniquify_name(struct evlist *evlist) |
2530 | { |
2531 | char *new_name, empty_attributes[2] = ":" , *attributes; |
2532 | struct evsel *pos; |
2533 | |
2534 | if (perf_pmus__num_core_pmus() == 1) |
2535 | return; |
2536 | |
2537 | evlist__for_each_entry(evlist, pos) { |
2538 | if (!evsel__is_hybrid(evsel: pos)) |
2539 | continue; |
2540 | |
2541 | if (strchr(pos->name, '/')) |
2542 | continue; |
2543 | |
2544 | attributes = strchr(pos->name, ':'); |
2545 | if (attributes) |
2546 | *attributes = '\0'; |
2547 | else |
2548 | attributes = empty_attributes; |
2549 | |
2550 | if (asprintf(&new_name, "%s/%s/%s" , pos->pmu_name, pos->name, attributes + 1)) { |
2551 | free(pos->name); |
2552 | pos->name = new_name; |
2553 | } else { |
2554 | *attributes = ':'; |
2555 | } |
2556 | } |
2557 | } |
2558 | |