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91007045 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
f8a95309 ACM |
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. | |
f8a95309 | 7 | */ |
956fa571 | 8 | #include <api/fs/fs.h> |
a43783ae | 9 | #include <errno.h> |
fd20e811 | 10 | #include <inttypes.h> |
5c581041 | 11 | #include <poll.h> |
f8a95309 ACM |
12 | #include "cpumap.h" |
13 | #include "thread_map.h" | |
12864b31 | 14 | #include "target.h" |
361c99a6 ACM |
15 | #include "evlist.h" |
16 | #include "evsel.h" | |
e3e1a54f | 17 | #include "debug.h" |
58db1d6e | 18 | #include "units.h" |
54cc54de | 19 | #include "asm/bug.h" |
657ee553 | 20 | #include "bpf-event.h" |
9607ad3a | 21 | #include <signal.h> |
35b9d88e | 22 | #include <unistd.h> |
361c99a6 | 23 | |
50d08e47 | 24 | #include "parse-events.h" |
4b6ab94e | 25 | #include <subcmd/parse-options.h> |
50d08e47 | 26 | |
bafae98e | 27 | #include <fcntl.h> |
86a5e0c2 | 28 | #include <sys/ioctl.h> |
f8a95309 ACM |
29 | #include <sys/mman.h> |
30 | ||
70db7533 ACM |
31 | #include <linux/bitops.h> |
32 | #include <linux/hash.h> | |
0389cd1f | 33 | #include <linux/log2.h> |
8dd2a131 | 34 | #include <linux/err.h> |
7f7c536f | 35 | #include <linux/zalloc.h> |
70db7533 | 36 | |
748fe088 ACM |
37 | #ifdef LACKS_SIGQUEUE_PROTOTYPE |
38 | int sigqueue(pid_t pid, int sig, const union sigval value); | |
39 | #endif | |
40 | ||
f8a95309 | 41 | #define FD(e, x, y) (*(int *)xyarray__entry(e->fd, x, y)) |
a91e5431 | 42 | #define SID(e, x, y) xyarray__entry(e->sample_id, x, y) |
f8a95309 | 43 | |
63503dba | 44 | void perf_evlist__init(struct evlist *evlist, struct perf_cpu_map *cpus, |
9749b90e | 45 | struct perf_thread_map *threads) |
ef1d1af2 ACM |
46 | { |
47 | int i; | |
48 | ||
49 | for (i = 0; i < PERF_EVLIST__HLIST_SIZE; ++i) | |
50 | INIT_HLIST_HEAD(&evlist->heads[i]); | |
51 | INIT_LIST_HEAD(&evlist->entries); | |
7e2ed097 | 52 | perf_evlist__set_maps(evlist, cpus, threads); |
1b85337d | 53 | fdarray__init(&evlist->pollfd, 64); |
35b9d88e | 54 | evlist->workload.pid = -1; |
54cc54de | 55 | evlist->bkw_mmap_state = BKW_MMAP_NOTREADY; |
ef1d1af2 ACM |
56 | } |
57 | ||
63503dba | 58 | struct evlist *perf_evlist__new(void) |
361c99a6 | 59 | { |
63503dba | 60 | struct evlist *evlist = zalloc(sizeof(*evlist)); |
361c99a6 | 61 | |
ef1d1af2 | 62 | if (evlist != NULL) |
334fe7a3 | 63 | perf_evlist__init(evlist, NULL, NULL); |
361c99a6 ACM |
64 | |
65 | return evlist; | |
66 | } | |
67 | ||
63503dba | 68 | struct evlist *perf_evlist__new_default(void) |
b22d54b0 | 69 | { |
63503dba | 70 | struct evlist *evlist = perf_evlist__new(); |
b22d54b0 JO |
71 | |
72 | if (evlist && perf_evlist__add_default(evlist)) { | |
73 | perf_evlist__delete(evlist); | |
74 | evlist = NULL; | |
75 | } | |
76 | ||
77 | return evlist; | |
78 | } | |
79 | ||
63503dba | 80 | struct evlist *perf_evlist__new_dummy(void) |
5bae0250 | 81 | { |
63503dba | 82 | struct evlist *evlist = perf_evlist__new(); |
5bae0250 ACM |
83 | |
84 | if (evlist && perf_evlist__add_dummy(evlist)) { | |
85 | perf_evlist__delete(evlist); | |
86 | evlist = NULL; | |
87 | } | |
88 | ||
89 | return evlist; | |
90 | } | |
91 | ||
75562573 AH |
92 | /** |
93 | * perf_evlist__set_id_pos - set the positions of event ids. | |
94 | * @evlist: selected event list | |
95 | * | |
96 | * Events with compatible sample types all have the same id_pos | |
97 | * and is_pos. For convenience, put a copy on evlist. | |
98 | */ | |
63503dba | 99 | void perf_evlist__set_id_pos(struct evlist *evlist) |
75562573 | 100 | { |
32dcd021 | 101 | struct evsel *first = perf_evlist__first(evlist); |
75562573 AH |
102 | |
103 | evlist->id_pos = first->id_pos; | |
104 | evlist->is_pos = first->is_pos; | |
105 | } | |
106 | ||
63503dba | 107 | static void perf_evlist__update_id_pos(struct evlist *evlist) |
733cd2fe | 108 | { |
32dcd021 | 109 | struct evsel *evsel; |
733cd2fe | 110 | |
e5cadb93 | 111 | evlist__for_each_entry(evlist, evsel) |
733cd2fe AH |
112 | perf_evsel__calc_id_pos(evsel); |
113 | ||
114 | perf_evlist__set_id_pos(evlist); | |
115 | } | |
116 | ||
63503dba | 117 | static void perf_evlist__purge(struct evlist *evlist) |
361c99a6 | 118 | { |
32dcd021 | 119 | struct evsel *pos, *n; |
361c99a6 | 120 | |
e5cadb93 | 121 | evlist__for_each_entry_safe(evlist, n, pos) { |
361c99a6 | 122 | list_del_init(&pos->node); |
d49e4695 | 123 | pos->evlist = NULL; |
361c99a6 ACM |
124 | perf_evsel__delete(pos); |
125 | } | |
126 | ||
127 | evlist->nr_entries = 0; | |
128 | } | |
129 | ||
63503dba | 130 | void perf_evlist__exit(struct evlist *evlist) |
361c99a6 | 131 | { |
04662523 | 132 | zfree(&evlist->mmap); |
0b72d69a | 133 | zfree(&evlist->overwrite_mmap); |
1b85337d | 134 | fdarray__exit(&evlist->pollfd); |
ef1d1af2 ACM |
135 | } |
136 | ||
63503dba | 137 | void perf_evlist__delete(struct evlist *evlist) |
ef1d1af2 | 138 | { |
0b04b3dc ACM |
139 | if (evlist == NULL) |
140 | return; | |
141 | ||
983874d1 | 142 | perf_evlist__munmap(evlist); |
f26e1c7c | 143 | perf_evlist__close(evlist); |
f30a79b0 | 144 | cpu_map__put(evlist->cpus); |
186fbb74 | 145 | thread_map__put(evlist->threads); |
03ad9747 ACM |
146 | evlist->cpus = NULL; |
147 | evlist->threads = NULL; | |
ef1d1af2 ACM |
148 | perf_evlist__purge(evlist); |
149 | perf_evlist__exit(evlist); | |
361c99a6 ACM |
150 | free(evlist); |
151 | } | |
152 | ||
63503dba | 153 | static void __perf_evlist__propagate_maps(struct evlist *evlist, |
32dcd021 | 154 | struct evsel *evsel) |
adc0c3e8 AH |
155 | { |
156 | /* | |
157 | * We already have cpus for evsel (via PMU sysfs) so | |
158 | * keep it, if there's no target cpu list defined. | |
159 | */ | |
160 | if (!evsel->own_cpus || evlist->has_user_cpus) { | |
161 | cpu_map__put(evsel->cpus); | |
162 | evsel->cpus = cpu_map__get(evlist->cpus); | |
163 | } else if (evsel->cpus != evsel->own_cpus) { | |
164 | cpu_map__put(evsel->cpus); | |
165 | evsel->cpus = cpu_map__get(evsel->own_cpus); | |
166 | } | |
167 | ||
168 | thread_map__put(evsel->threads); | |
169 | evsel->threads = thread_map__get(evlist->threads); | |
170 | } | |
171 | ||
63503dba | 172 | static void perf_evlist__propagate_maps(struct evlist *evlist) |
adc0c3e8 | 173 | { |
32dcd021 | 174 | struct evsel *evsel; |
adc0c3e8 | 175 | |
e5cadb93 | 176 | evlist__for_each_entry(evlist, evsel) |
adc0c3e8 AH |
177 | __perf_evlist__propagate_maps(evlist, evsel); |
178 | } | |
179 | ||
63503dba | 180 | void perf_evlist__add(struct evlist *evlist, struct evsel *entry) |
361c99a6 | 181 | { |
d49e4695 | 182 | entry->evlist = evlist; |
361c99a6 | 183 | list_add_tail(&entry->node, &evlist->entries); |
ef503831 | 184 | entry->idx = evlist->nr_entries; |
60b0896c | 185 | entry->tracking = !entry->idx; |
ef503831 | 186 | |
75562573 AH |
187 | if (!evlist->nr_entries++) |
188 | perf_evlist__set_id_pos(evlist); | |
44c42d71 AH |
189 | |
190 | __perf_evlist__propagate_maps(evlist, entry); | |
361c99a6 ACM |
191 | } |
192 | ||
63503dba | 193 | void perf_evlist__remove(struct evlist *evlist, struct evsel *evsel) |
4768230a AH |
194 | { |
195 | evsel->evlist = NULL; | |
196 | list_del_init(&evsel->node); | |
197 | evlist->nr_entries -= 1; | |
198 | } | |
199 | ||
63503dba | 200 | void perf_evlist__splice_list_tail(struct evlist *evlist, |
f114d6ef | 201 | struct list_head *list) |
50d08e47 | 202 | { |
32dcd021 | 203 | struct evsel *evsel, *temp; |
75562573 | 204 | |
e5cadb93 | 205 | __evlist__for_each_entry_safe(list, temp, evsel) { |
f114d6ef AH |
206 | list_del_init(&evsel->node); |
207 | perf_evlist__add(evlist, evsel); | |
208 | } | |
50d08e47 ACM |
209 | } |
210 | ||
63dab225 ACM |
211 | void __perf_evlist__set_leader(struct list_head *list) |
212 | { | |
32dcd021 | 213 | struct evsel *evsel, *leader; |
63dab225 | 214 | |
32dcd021 JO |
215 | leader = list_entry(list->next, struct evsel, node); |
216 | evsel = list_entry(list->prev, struct evsel, node); | |
97f63e4a NK |
217 | |
218 | leader->nr_members = evsel->idx - leader->idx + 1; | |
63dab225 | 219 | |
e5cadb93 | 220 | __evlist__for_each_entry(list, evsel) { |
74b2133d | 221 | evsel->leader = leader; |
63dab225 ACM |
222 | } |
223 | } | |
224 | ||
63503dba | 225 | void perf_evlist__set_leader(struct evlist *evlist) |
6a4bb04c | 226 | { |
97f63e4a NK |
227 | if (evlist->nr_entries) { |
228 | evlist->nr_groups = evlist->nr_entries > 1 ? 1 : 0; | |
63dab225 | 229 | __perf_evlist__set_leader(&evlist->entries); |
97f63e4a | 230 | } |
6a4bb04c JO |
231 | } |
232 | ||
63503dba | 233 | int __perf_evlist__add_default(struct evlist *evlist, bool precise) |
361c99a6 | 234 | { |
32dcd021 | 235 | struct evsel *evsel = perf_evsel__new_cycles(precise); |
1aed2671 | 236 | |
361c99a6 | 237 | if (evsel == NULL) |
7c48dcfd | 238 | return -ENOMEM; |
361c99a6 ACM |
239 | |
240 | perf_evlist__add(evlist, evsel); | |
241 | return 0; | |
242 | } | |
5c581041 | 243 | |
63503dba | 244 | int perf_evlist__add_dummy(struct evlist *evlist) |
5bae0250 ACM |
245 | { |
246 | struct perf_event_attr attr = { | |
247 | .type = PERF_TYPE_SOFTWARE, | |
248 | .config = PERF_COUNT_SW_DUMMY, | |
249 | .size = sizeof(attr), /* to capture ABI version */ | |
250 | }; | |
32dcd021 | 251 | struct evsel *evsel = perf_evsel__new_idx(&attr, evlist->nr_entries); |
5bae0250 ACM |
252 | |
253 | if (evsel == NULL) | |
254 | return -ENOMEM; | |
255 | ||
256 | perf_evlist__add(evlist, evsel); | |
257 | return 0; | |
258 | } | |
259 | ||
63503dba | 260 | static int perf_evlist__add_attrs(struct evlist *evlist, |
e60fc847 | 261 | struct perf_event_attr *attrs, size_t nr_attrs) |
50d08e47 | 262 | { |
32dcd021 | 263 | struct evsel *evsel, *n; |
50d08e47 ACM |
264 | LIST_HEAD(head); |
265 | size_t i; | |
266 | ||
267 | for (i = 0; i < nr_attrs; i++) { | |
ef503831 | 268 | evsel = perf_evsel__new_idx(attrs + i, evlist->nr_entries + i); |
50d08e47 ACM |
269 | if (evsel == NULL) |
270 | goto out_delete_partial_list; | |
271 | list_add_tail(&evsel->node, &head); | |
272 | } | |
273 | ||
f114d6ef | 274 | perf_evlist__splice_list_tail(evlist, &head); |
50d08e47 ACM |
275 | |
276 | return 0; | |
277 | ||
278 | out_delete_partial_list: | |
e5cadb93 | 279 | __evlist__for_each_entry_safe(&head, n, evsel) |
50d08e47 ACM |
280 | perf_evsel__delete(evsel); |
281 | return -1; | |
282 | } | |
283 | ||
63503dba | 284 | int __perf_evlist__add_default_attrs(struct evlist *evlist, |
79695e1b ACM |
285 | struct perf_event_attr *attrs, size_t nr_attrs) |
286 | { | |
287 | size_t i; | |
288 | ||
289 | for (i = 0; i < nr_attrs; i++) | |
290 | event_attr_init(attrs + i); | |
291 | ||
292 | return perf_evlist__add_attrs(evlist, attrs, nr_attrs); | |
293 | } | |
294 | ||
32dcd021 | 295 | struct evsel * |
63503dba | 296 | perf_evlist__find_tracepoint_by_id(struct evlist *evlist, int id) |
ee29be62 | 297 | { |
32dcd021 | 298 | struct evsel *evsel; |
ee29be62 | 299 | |
e5cadb93 | 300 | evlist__for_each_entry(evlist, evsel) { |
ee29be62 ACM |
301 | if (evsel->attr.type == PERF_TYPE_TRACEPOINT && |
302 | (int)evsel->attr.config == id) | |
303 | return evsel; | |
304 | } | |
305 | ||
306 | return NULL; | |
307 | } | |
308 | ||
32dcd021 | 309 | struct evsel * |
63503dba | 310 | perf_evlist__find_tracepoint_by_name(struct evlist *evlist, |
a2f2804a DA |
311 | const char *name) |
312 | { | |
32dcd021 | 313 | struct evsel *evsel; |
a2f2804a | 314 | |
e5cadb93 | 315 | evlist__for_each_entry(evlist, evsel) { |
a2f2804a DA |
316 | if ((evsel->attr.type == PERF_TYPE_TRACEPOINT) && |
317 | (strcmp(evsel->name, name) == 0)) | |
318 | return evsel; | |
319 | } | |
320 | ||
321 | return NULL; | |
322 | } | |
323 | ||
63503dba | 324 | int perf_evlist__add_newtp(struct evlist *evlist, |
39876e7d ACM |
325 | const char *sys, const char *name, void *handler) |
326 | { | |
32dcd021 | 327 | struct evsel *evsel = perf_evsel__newtp(sys, name); |
39876e7d | 328 | |
8dd2a131 | 329 | if (IS_ERR(evsel)) |
39876e7d ACM |
330 | return -1; |
331 | ||
744a9719 | 332 | evsel->handler = handler; |
39876e7d ACM |
333 | perf_evlist__add(evlist, evsel); |
334 | return 0; | |
335 | } | |
336 | ||
63503dba | 337 | static int perf_evlist__nr_threads(struct evlist *evlist, |
32dcd021 | 338 | struct evsel *evsel) |
bf8e8f4b AH |
339 | { |
340 | if (evsel->system_wide) | |
341 | return 1; | |
342 | else | |
343 | return thread_map__nr(evlist->threads); | |
344 | } | |
345 | ||
63503dba | 346 | void perf_evlist__disable(struct evlist *evlist) |
4152ab37 | 347 | { |
32dcd021 | 348 | struct evsel *pos; |
3e27c920 | 349 | |
e5cadb93 | 350 | evlist__for_each_entry(evlist, pos) { |
b7e8452b | 351 | if (pos->disabled || !perf_evsel__is_group_leader(pos) || !pos->fd) |
3e27c920 JO |
352 | continue; |
353 | perf_evsel__disable(pos); | |
4152ab37 | 354 | } |
2b56bcfb ACM |
355 | |
356 | evlist->enabled = false; | |
4152ab37 ACM |
357 | } |
358 | ||
63503dba | 359 | void perf_evlist__enable(struct evlist *evlist) |
764e16a3 | 360 | { |
32dcd021 | 361 | struct evsel *pos; |
3e27c920 | 362 | |
e5cadb93 | 363 | evlist__for_each_entry(evlist, pos) { |
3e27c920 JO |
364 | if (!perf_evsel__is_group_leader(pos) || !pos->fd) |
365 | continue; | |
366 | perf_evsel__enable(pos); | |
764e16a3 | 367 | } |
2b56bcfb ACM |
368 | |
369 | evlist->enabled = true; | |
370 | } | |
371 | ||
63503dba | 372 | void perf_evlist__toggle_enable(struct evlist *evlist) |
2b56bcfb ACM |
373 | { |
374 | (evlist->enabled ? perf_evlist__disable : perf_evlist__enable)(evlist); | |
764e16a3 DA |
375 | } |
376 | ||
63503dba | 377 | static int perf_evlist__enable_event_cpu(struct evlist *evlist, |
32dcd021 | 378 | struct evsel *evsel, int cpu) |
1c65056c | 379 | { |
18ef15c6 | 380 | int thread; |
1c65056c AH |
381 | int nr_threads = perf_evlist__nr_threads(evlist, evsel); |
382 | ||
383 | if (!evsel->fd) | |
384 | return -EINVAL; | |
385 | ||
386 | for (thread = 0; thread < nr_threads; thread++) { | |
18ef15c6 | 387 | int err = ioctl(FD(evsel, cpu, thread), PERF_EVENT_IOC_ENABLE, 0); |
1c65056c AH |
388 | if (err) |
389 | return err; | |
390 | } | |
391 | return 0; | |
392 | } | |
393 | ||
63503dba | 394 | static int perf_evlist__enable_event_thread(struct evlist *evlist, |
32dcd021 | 395 | struct evsel *evsel, |
1c65056c AH |
396 | int thread) |
397 | { | |
18ef15c6 | 398 | int cpu; |
1c65056c AH |
399 | int nr_cpus = cpu_map__nr(evlist->cpus); |
400 | ||
401 | if (!evsel->fd) | |
402 | return -EINVAL; | |
403 | ||
404 | for (cpu = 0; cpu < nr_cpus; cpu++) { | |
18ef15c6 | 405 | int err = ioctl(FD(evsel, cpu, thread), PERF_EVENT_IOC_ENABLE, 0); |
1c65056c AH |
406 | if (err) |
407 | return err; | |
408 | } | |
409 | return 0; | |
410 | } | |
411 | ||
63503dba | 412 | int perf_evlist__enable_event_idx(struct evlist *evlist, |
32dcd021 | 413 | struct evsel *evsel, int idx) |
1c65056c AH |
414 | { |
415 | bool per_cpu_mmaps = !cpu_map__empty(evlist->cpus); | |
416 | ||
417 | if (per_cpu_mmaps) | |
418 | return perf_evlist__enable_event_cpu(evlist, evsel, idx); | |
419 | else | |
420 | return perf_evlist__enable_event_thread(evlist, evsel, idx); | |
421 | } | |
422 | ||
63503dba | 423 | int perf_evlist__alloc_pollfd(struct evlist *evlist) |
5c581041 | 424 | { |
b3a319d5 NK |
425 | int nr_cpus = cpu_map__nr(evlist->cpus); |
426 | int nr_threads = thread_map__nr(evlist->threads); | |
bf8e8f4b | 427 | int nfds = 0; |
32dcd021 | 428 | struct evsel *evsel; |
bf8e8f4b | 429 | |
e5cadb93 | 430 | evlist__for_each_entry(evlist, evsel) { |
bf8e8f4b AH |
431 | if (evsel->system_wide) |
432 | nfds += nr_cpus; | |
433 | else | |
434 | nfds += nr_cpus * nr_threads; | |
435 | } | |
436 | ||
1b85337d ACM |
437 | if (fdarray__available_entries(&evlist->pollfd) < nfds && |
438 | fdarray__grow(&evlist->pollfd, nfds) < 0) | |
ad6765dd ACM |
439 | return -ENOMEM; |
440 | ||
441 | return 0; | |
5c581041 | 442 | } |
70082dd9 | 443 | |
63503dba | 444 | static int __perf_evlist__add_pollfd(struct evlist *evlist, int fd, |
4876075b | 445 | struct perf_mmap *map, short revent) |
e4b356b5 | 446 | { |
f3058a1c | 447 | int pos = fdarray__add(&evlist->pollfd, fd, revent | POLLERR | POLLHUP); |
e4b356b5 ACM |
448 | /* |
449 | * Save the idx so that when we filter out fds POLLHUP'ed we can | |
450 | * close the associated evlist->mmap[] entry. | |
451 | */ | |
452 | if (pos >= 0) { | |
4876075b | 453 | evlist->pollfd.priv[pos].ptr = map; |
e4b356b5 ACM |
454 | |
455 | fcntl(fd, F_SETFL, O_NONBLOCK); | |
456 | } | |
457 | ||
458 | return pos; | |
459 | } | |
460 | ||
63503dba | 461 | int perf_evlist__add_pollfd(struct evlist *evlist, int fd) |
70082dd9 | 462 | { |
4876075b | 463 | return __perf_evlist__add_pollfd(evlist, fd, NULL, POLLIN); |
e4b356b5 ACM |
464 | } |
465 | ||
258e4bfc WN |
466 | static void perf_evlist__munmap_filtered(struct fdarray *fda, int fd, |
467 | void *arg __maybe_unused) | |
e4b356b5 | 468 | { |
4876075b | 469 | struct perf_mmap *map = fda->priv[fd].ptr; |
1b85337d | 470 | |
4876075b WN |
471 | if (map) |
472 | perf_mmap__put(map); | |
70082dd9 | 473 | } |
70db7533 | 474 | |
63503dba | 475 | int perf_evlist__filter_pollfd(struct evlist *evlist, short revents_and_mask) |
1ddec7f0 | 476 | { |
e4b356b5 | 477 | return fdarray__filter(&evlist->pollfd, revents_and_mask, |
258e4bfc | 478 | perf_evlist__munmap_filtered, NULL); |
1ddec7f0 ACM |
479 | } |
480 | ||
63503dba | 481 | int perf_evlist__poll(struct evlist *evlist, int timeout) |
f66a889d | 482 | { |
1b85337d | 483 | return fdarray__poll(&evlist->pollfd, timeout); |
f66a889d ACM |
484 | } |
485 | ||
63503dba | 486 | static void perf_evlist__id_hash(struct evlist *evlist, |
32dcd021 | 487 | struct evsel *evsel, |
a91e5431 | 488 | int cpu, int thread, u64 id) |
3d3b5e95 ACM |
489 | { |
490 | int hash; | |
491 | struct perf_sample_id *sid = SID(evsel, cpu, thread); | |
492 | ||
493 | sid->id = id; | |
494 | sid->evsel = evsel; | |
495 | hash = hash_64(sid->id, PERF_EVLIST__HLIST_BITS); | |
496 | hlist_add_head(&sid->node, &evlist->heads[hash]); | |
497 | } | |
498 | ||
63503dba | 499 | void perf_evlist__id_add(struct evlist *evlist, struct evsel *evsel, |
a91e5431 ACM |
500 | int cpu, int thread, u64 id) |
501 | { | |
502 | perf_evlist__id_hash(evlist, evsel, cpu, thread, id); | |
503 | evsel->id[evsel->ids++] = id; | |
504 | } | |
505 | ||
63503dba | 506 | int perf_evlist__id_add_fd(struct evlist *evlist, |
32dcd021 | 507 | struct evsel *evsel, |
1c59612d | 508 | int cpu, int thread, int fd) |
f8a95309 | 509 | { |
f8a95309 | 510 | u64 read_data[4] = { 0, }; |
3d3b5e95 | 511 | int id_idx = 1; /* The first entry is the counter value */ |
e2b5abe0 JO |
512 | u64 id; |
513 | int ret; | |
514 | ||
515 | ret = ioctl(fd, PERF_EVENT_IOC_ID, &id); | |
516 | if (!ret) | |
517 | goto add; | |
518 | ||
519 | if (errno != ENOTTY) | |
520 | return -1; | |
521 | ||
522 | /* Legacy way to get event id.. All hail to old kernels! */ | |
f8a95309 | 523 | |
c4861afe JO |
524 | /* |
525 | * This way does not work with group format read, so bail | |
526 | * out in that case. | |
527 | */ | |
528 | if (perf_evlist__read_format(evlist) & PERF_FORMAT_GROUP) | |
529 | return -1; | |
530 | ||
f8a95309 ACM |
531 | if (!(evsel->attr.read_format & PERF_FORMAT_ID) || |
532 | read(fd, &read_data, sizeof(read_data)) == -1) | |
533 | return -1; | |
534 | ||
535 | if (evsel->attr.read_format & PERF_FORMAT_TOTAL_TIME_ENABLED) | |
536 | ++id_idx; | |
537 | if (evsel->attr.read_format & PERF_FORMAT_TOTAL_TIME_RUNNING) | |
538 | ++id_idx; | |
539 | ||
e2b5abe0 JO |
540 | id = read_data[id_idx]; |
541 | ||
542 | add: | |
543 | perf_evlist__id_add(evlist, evsel, cpu, thread, id); | |
f8a95309 ACM |
544 | return 0; |
545 | } | |
546 | ||
63503dba | 547 | static void perf_evlist__set_sid_idx(struct evlist *evlist, |
32dcd021 | 548 | struct evsel *evsel, int idx, int cpu, |
3c659eed AH |
549 | int thread) |
550 | { | |
551 | struct perf_sample_id *sid = SID(evsel, cpu, thread); | |
552 | sid->idx = idx; | |
553 | if (evlist->cpus && cpu >= 0) | |
554 | sid->cpu = evlist->cpus->map[cpu]; | |
555 | else | |
556 | sid->cpu = -1; | |
557 | if (!evsel->system_wide && evlist->threads && thread >= 0) | |
e13798c7 | 558 | sid->tid = thread_map__pid(evlist->threads, thread); |
3c659eed AH |
559 | else |
560 | sid->tid = -1; | |
561 | } | |
562 | ||
63503dba | 563 | struct perf_sample_id *perf_evlist__id2sid(struct evlist *evlist, u64 id) |
70db7533 ACM |
564 | { |
565 | struct hlist_head *head; | |
70db7533 ACM |
566 | struct perf_sample_id *sid; |
567 | int hash; | |
568 | ||
70db7533 ACM |
569 | hash = hash_64(id, PERF_EVLIST__HLIST_BITS); |
570 | head = &evlist->heads[hash]; | |
571 | ||
b67bfe0d | 572 | hlist_for_each_entry(sid, head, node) |
70db7533 | 573 | if (sid->id == id) |
932a3594 JO |
574 | return sid; |
575 | ||
576 | return NULL; | |
577 | } | |
578 | ||
63503dba | 579 | struct evsel *perf_evlist__id2evsel(struct evlist *evlist, u64 id) |
932a3594 JO |
580 | { |
581 | struct perf_sample_id *sid; | |
582 | ||
05169df5 | 583 | if (evlist->nr_entries == 1 || !id) |
932a3594 JO |
584 | return perf_evlist__first(evlist); |
585 | ||
586 | sid = perf_evlist__id2sid(evlist, id); | |
587 | if (sid) | |
588 | return sid->evsel; | |
30e68bcc NK |
589 | |
590 | if (!perf_evlist__sample_id_all(evlist)) | |
0c21f736 | 591 | return perf_evlist__first(evlist); |
30e68bcc | 592 | |
70db7533 ACM |
593 | return NULL; |
594 | } | |
04391deb | 595 | |
63503dba | 596 | struct evsel *perf_evlist__id2evsel_strict(struct evlist *evlist, |
dddcf6ab AH |
597 | u64 id) |
598 | { | |
599 | struct perf_sample_id *sid; | |
600 | ||
601 | if (!id) | |
602 | return NULL; | |
603 | ||
604 | sid = perf_evlist__id2sid(evlist, id); | |
605 | if (sid) | |
606 | return sid->evsel; | |
607 | ||
608 | return NULL; | |
609 | } | |
610 | ||
63503dba | 611 | static int perf_evlist__event2id(struct evlist *evlist, |
75562573 AH |
612 | union perf_event *event, u64 *id) |
613 | { | |
614 | const u64 *array = event->sample.array; | |
615 | ssize_t n; | |
616 | ||
617 | n = (event->header.size - sizeof(event->header)) >> 3; | |
618 | ||
619 | if (event->header.type == PERF_RECORD_SAMPLE) { | |
620 | if (evlist->id_pos >= n) | |
621 | return -1; | |
622 | *id = array[evlist->id_pos]; | |
623 | } else { | |
624 | if (evlist->is_pos > n) | |
625 | return -1; | |
626 | n -= evlist->is_pos; | |
627 | *id = array[n]; | |
628 | } | |
629 | return 0; | |
630 | } | |
631 | ||
63503dba | 632 | struct evsel *perf_evlist__event2evsel(struct evlist *evlist, |
7cb5c5ac | 633 | union perf_event *event) |
75562573 | 634 | { |
32dcd021 | 635 | struct evsel *first = perf_evlist__first(evlist); |
75562573 AH |
636 | struct hlist_head *head; |
637 | struct perf_sample_id *sid; | |
638 | int hash; | |
639 | u64 id; | |
640 | ||
641 | if (evlist->nr_entries == 1) | |
98be6966 AH |
642 | return first; |
643 | ||
644 | if (!first->attr.sample_id_all && | |
645 | event->header.type != PERF_RECORD_SAMPLE) | |
646 | return first; | |
75562573 AH |
647 | |
648 | if (perf_evlist__event2id(evlist, event, &id)) | |
649 | return NULL; | |
650 | ||
651 | /* Synthesized events have an id of zero */ | |
652 | if (!id) | |
98be6966 | 653 | return first; |
75562573 AH |
654 | |
655 | hash = hash_64(id, PERF_EVLIST__HLIST_BITS); | |
656 | head = &evlist->heads[hash]; | |
657 | ||
658 | hlist_for_each_entry(sid, head, node) { | |
659 | if (sid->id == id) | |
660 | return sid->evsel; | |
661 | } | |
662 | return NULL; | |
663 | } | |
664 | ||
63503dba | 665 | static int perf_evlist__set_paused(struct evlist *evlist, bool value) |
65aea233 WN |
666 | { |
667 | int i; | |
668 | ||
0b72d69a | 669 | if (!evlist->overwrite_mmap) |
078c3386 WN |
670 | return 0; |
671 | ||
65aea233 | 672 | for (i = 0; i < evlist->nr_mmaps; i++) { |
0b72d69a | 673 | int fd = evlist->overwrite_mmap[i].fd; |
65aea233 WN |
674 | int err; |
675 | ||
676 | if (fd < 0) | |
677 | continue; | |
678 | err = ioctl(fd, PERF_EVENT_IOC_PAUSE_OUTPUT, value ? 1 : 0); | |
679 | if (err) | |
680 | return err; | |
681 | } | |
682 | return 0; | |
683 | } | |
684 | ||
63503dba | 685 | static int perf_evlist__pause(struct evlist *evlist) |
65aea233 WN |
686 | { |
687 | return perf_evlist__set_paused(evlist, true); | |
688 | } | |
689 | ||
63503dba | 690 | static int perf_evlist__resume(struct evlist *evlist) |
65aea233 WN |
691 | { |
692 | return perf_evlist__set_paused(evlist, false); | |
693 | } | |
694 | ||
63503dba | 695 | static void perf_evlist__munmap_nofree(struct evlist *evlist) |
f8a95309 | 696 | { |
aece948f | 697 | int i; |
f8a95309 | 698 | |
b2cb615d WN |
699 | if (evlist->mmap) |
700 | for (i = 0; i < evlist->nr_mmaps; i++) | |
701 | perf_mmap__munmap(&evlist->mmap[i]); | |
983874d1 | 702 | |
0b72d69a | 703 | if (evlist->overwrite_mmap) |
b2cb615d | 704 | for (i = 0; i < evlist->nr_mmaps; i++) |
0b72d69a | 705 | perf_mmap__munmap(&evlist->overwrite_mmap[i]); |
a1f72618 | 706 | } |
aece948f | 707 | |
63503dba | 708 | void perf_evlist__munmap(struct evlist *evlist) |
a1f72618 WN |
709 | { |
710 | perf_evlist__munmap_nofree(evlist); | |
04662523 | 711 | zfree(&evlist->mmap); |
0b72d69a | 712 | zfree(&evlist->overwrite_mmap); |
f8a95309 ACM |
713 | } |
714 | ||
63503dba | 715 | static struct perf_mmap *perf_evlist__alloc_mmap(struct evlist *evlist, |
2c5f6d87 | 716 | bool overwrite) |
f8a95309 | 717 | { |
d4c6fb36 | 718 | int i; |
8db6d6b1 | 719 | struct perf_mmap *map; |
d4c6fb36 | 720 | |
a14bb7a6 | 721 | evlist->nr_mmaps = cpu_map__nr(evlist->cpus); |
ec1e7e43 | 722 | if (cpu_map__empty(evlist->cpus)) |
b3a319d5 | 723 | evlist->nr_mmaps = thread_map__nr(evlist->threads); |
8db6d6b1 WN |
724 | map = zalloc(evlist->nr_mmaps * sizeof(struct perf_mmap)); |
725 | if (!map) | |
726 | return NULL; | |
946ae1d4 | 727 | |
4738ca30 | 728 | for (i = 0; i < evlist->nr_mmaps; i++) { |
8db6d6b1 | 729 | map[i].fd = -1; |
2c5f6d87 | 730 | map[i].overwrite = overwrite; |
4738ca30 ACM |
731 | /* |
732 | * When the perf_mmap() call is made we grab one refcount, plus | |
6afad54d | 733 | * one extra to let perf_mmap__consume() get the last |
4738ca30 ACM |
734 | * events after all real references (perf_mmap__get()) are |
735 | * dropped. | |
736 | * | |
737 | * Each PERF_EVENT_IOC_SET_OUTPUT points to this mmap and | |
738 | * thus does perf_mmap__get() on it. | |
739 | */ | |
740 | refcount_set(&map[i].refcnt, 0); | |
741 | } | |
8db6d6b1 | 742 | return map; |
f8a95309 ACM |
743 | } |
744 | ||
f3058a1c | 745 | static bool |
63503dba | 746 | perf_evlist__should_poll(struct evlist *evlist __maybe_unused, |
32dcd021 | 747 | struct evsel *evsel) |
f3058a1c | 748 | { |
32a951b4 | 749 | if (evsel->attr.write_backward) |
f3058a1c WN |
750 | return false; |
751 | return true; | |
752 | } | |
753 | ||
63503dba | 754 | static int perf_evlist__mmap_per_evsel(struct evlist *evlist, int idx, |
9f21b815 | 755 | struct mmap_params *mp, int cpu_idx, |
0b72d69a | 756 | int thread, int *_output, int *_output_overwrite) |
aece948f | 757 | { |
32dcd021 | 758 | struct evsel *evsel; |
f3058a1c | 759 | int revent; |
9f21b815 | 760 | int evlist_cpu = cpu_map__cpu(evlist->cpus, cpu_idx); |
04e21314 | 761 | |
e5cadb93 | 762 | evlist__for_each_entry(evlist, evsel) { |
078c3386 WN |
763 | struct perf_mmap *maps = evlist->mmap; |
764 | int *output = _output; | |
bf8e8f4b | 765 | int fd; |
9f21b815 | 766 | int cpu; |
bf8e8f4b | 767 | |
71f566a3 | 768 | mp->prot = PROT_READ | PROT_WRITE; |
078c3386 | 769 | if (evsel->attr.write_backward) { |
0b72d69a WN |
770 | output = _output_overwrite; |
771 | maps = evlist->overwrite_mmap; | |
078c3386 WN |
772 | |
773 | if (!maps) { | |
2c5f6d87 | 774 | maps = perf_evlist__alloc_mmap(evlist, true); |
078c3386 WN |
775 | if (!maps) |
776 | return -1; | |
0b72d69a | 777 | evlist->overwrite_mmap = maps; |
54cc54de WN |
778 | if (evlist->bkw_mmap_state == BKW_MMAP_NOTREADY) |
779 | perf_evlist__toggle_bkw_mmap(evlist, BKW_MMAP_RUNNING); | |
078c3386 | 780 | } |
71f566a3 | 781 | mp->prot &= ~PROT_WRITE; |
078c3386 | 782 | } |
f3058a1c | 783 | |
bf8e8f4b AH |
784 | if (evsel->system_wide && thread) |
785 | continue; | |
786 | ||
9f21b815 MR |
787 | cpu = cpu_map__idx(evsel->cpus, evlist_cpu); |
788 | if (cpu == -1) | |
789 | continue; | |
790 | ||
bf8e8f4b | 791 | fd = FD(evsel, cpu, thread); |
04e21314 AH |
792 | |
793 | if (*output == -1) { | |
794 | *output = fd; | |
078c3386 | 795 | |
31fb4c0d | 796 | if (perf_mmap__mmap(&maps[idx], mp, *output, evlist_cpu) < 0) |
04e21314 AH |
797 | return -1; |
798 | } else { | |
799 | if (ioctl(fd, PERF_EVENT_IOC_SET_OUTPUT, *output) != 0) | |
800 | return -1; | |
82396986 | 801 | |
078c3386 | 802 | perf_mmap__get(&maps[idx]); |
04e21314 AH |
803 | } |
804 | ||
f3058a1c WN |
805 | revent = perf_evlist__should_poll(evlist, evsel) ? POLLIN : 0; |
806 | ||
f90d194a AH |
807 | /* |
808 | * The system_wide flag causes a selected event to be opened | |
809 | * always without a pid. Consequently it will never get a | |
810 | * POLLHUP, but it is used for tracking in combination with | |
811 | * other events, so it should not need to be polled anyway. | |
812 | * Therefore don't add it for polling. | |
813 | */ | |
814 | if (!evsel->system_wide && | |
078c3386 WN |
815 | __perf_evlist__add_pollfd(evlist, fd, &maps[idx], revent) < 0) { |
816 | perf_mmap__put(&maps[idx]); | |
ad6765dd | 817 | return -1; |
82396986 | 818 | } |
033fa713 | 819 | |
3c659eed AH |
820 | if (evsel->attr.read_format & PERF_FORMAT_ID) { |
821 | if (perf_evlist__id_add_fd(evlist, evsel, cpu, thread, | |
822 | fd) < 0) | |
823 | return -1; | |
824 | perf_evlist__set_sid_idx(evlist, evsel, idx, cpu, | |
825 | thread); | |
826 | } | |
04e21314 AH |
827 | } |
828 | ||
829 | return 0; | |
830 | } | |
831 | ||
63503dba | 832 | static int perf_evlist__mmap_per_cpu(struct evlist *evlist, |
a8a8f3eb | 833 | struct mmap_params *mp) |
04e21314 | 834 | { |
aece948f | 835 | int cpu, thread; |
b3a319d5 NK |
836 | int nr_cpus = cpu_map__nr(evlist->cpus); |
837 | int nr_threads = thread_map__nr(evlist->threads); | |
aece948f | 838 | |
e3e1a54f | 839 | pr_debug2("perf event ring buffer mmapped per cpu\n"); |
b3a319d5 | 840 | for (cpu = 0; cpu < nr_cpus; cpu++) { |
aece948f | 841 | int output = -1; |
0b72d69a | 842 | int output_overwrite = -1; |
aece948f | 843 | |
718c602d AH |
844 | auxtrace_mmap_params__set_idx(&mp->auxtrace_mp, evlist, cpu, |
845 | true); | |
846 | ||
b3a319d5 | 847 | for (thread = 0; thread < nr_threads; thread++) { |
a8a8f3eb | 848 | if (perf_evlist__mmap_per_evsel(evlist, cpu, mp, cpu, |
0b72d69a | 849 | thread, &output, &output_overwrite)) |
04e21314 | 850 | goto out_unmap; |
aece948f ACM |
851 | } |
852 | } | |
853 | ||
854 | return 0; | |
855 | ||
856 | out_unmap: | |
a1f72618 | 857 | perf_evlist__munmap_nofree(evlist); |
aece948f ACM |
858 | return -1; |
859 | } | |
860 | ||
63503dba | 861 | static int perf_evlist__mmap_per_thread(struct evlist *evlist, |
a8a8f3eb | 862 | struct mmap_params *mp) |
aece948f | 863 | { |
aece948f | 864 | int thread; |
b3a319d5 | 865 | int nr_threads = thread_map__nr(evlist->threads); |
aece948f | 866 | |
e3e1a54f | 867 | pr_debug2("perf event ring buffer mmapped per thread\n"); |
b3a319d5 | 868 | for (thread = 0; thread < nr_threads; thread++) { |
aece948f | 869 | int output = -1; |
0b72d69a | 870 | int output_overwrite = -1; |
aece948f | 871 | |
718c602d AH |
872 | auxtrace_mmap_params__set_idx(&mp->auxtrace_mp, evlist, thread, |
873 | false); | |
874 | ||
a8a8f3eb | 875 | if (perf_evlist__mmap_per_evsel(evlist, thread, mp, 0, thread, |
0b72d69a | 876 | &output, &output_overwrite)) |
04e21314 | 877 | goto out_unmap; |
aece948f ACM |
878 | } |
879 | ||
880 | return 0; | |
881 | ||
882 | out_unmap: | |
a1f72618 | 883 | perf_evlist__munmap_nofree(evlist); |
aece948f ACM |
884 | return -1; |
885 | } | |
886 | ||
f5e7150c | 887 | unsigned long perf_event_mlock_kb_in_pages(void) |
994a1f78 | 888 | { |
f5e7150c ACM |
889 | unsigned long pages; |
890 | int max; | |
8185e881 | 891 | |
f5e7150c ACM |
892 | if (sysctl__read_int("kernel/perf_event_mlock_kb", &max) < 0) { |
893 | /* | |
894 | * Pick a once upon a time good value, i.e. things look | |
895 | * strange since we can't read a sysctl value, but lets not | |
896 | * die yet... | |
897 | */ | |
898 | max = 512; | |
899 | } else { | |
900 | max -= (page_size / 1024); | |
901 | } | |
8185e881 | 902 | |
f5e7150c ACM |
903 | pages = (max * 1024) / page_size; |
904 | if (!is_power_of_2(pages)) | |
905 | pages = rounddown_pow_of_two(pages); | |
906 | ||
907 | return pages; | |
908 | } | |
909 | ||
0c582449 | 910 | size_t perf_evlist__mmap_size(unsigned long pages) |
f5e7150c ACM |
911 | { |
912 | if (pages == UINT_MAX) | |
913 | pages = perf_event_mlock_kb_in_pages(); | |
914 | else if (!is_power_of_2(pages)) | |
994a1f78 JO |
915 | return 0; |
916 | ||
917 | return (pages + 1) * page_size; | |
918 | } | |
919 | ||
33c2dcfd DA |
920 | static long parse_pages_arg(const char *str, unsigned long min, |
921 | unsigned long max) | |
994a1f78 | 922 | { |
2fbe4abe | 923 | unsigned long pages, val; |
27050f53 JO |
924 | static struct parse_tag tags[] = { |
925 | { .tag = 'B', .mult = 1 }, | |
926 | { .tag = 'K', .mult = 1 << 10 }, | |
927 | { .tag = 'M', .mult = 1 << 20 }, | |
928 | { .tag = 'G', .mult = 1 << 30 }, | |
929 | { .tag = 0 }, | |
930 | }; | |
994a1f78 | 931 | |
8973504b | 932 | if (str == NULL) |
33c2dcfd | 933 | return -EINVAL; |
8973504b | 934 | |
27050f53 | 935 | val = parse_tag_value(str, tags); |
2fbe4abe | 936 | if (val != (unsigned long) -1) { |
27050f53 JO |
937 | /* we got file size value */ |
938 | pages = PERF_ALIGN(val, page_size) / page_size; | |
27050f53 JO |
939 | } else { |
940 | /* we got pages count value */ | |
941 | char *eptr; | |
942 | pages = strtoul(str, &eptr, 10); | |
33c2dcfd DA |
943 | if (*eptr != '\0') |
944 | return -EINVAL; | |
994a1f78 JO |
945 | } |
946 | ||
2bcab6c1 | 947 | if (pages == 0 && min == 0) { |
33c2dcfd | 948 | /* leave number of pages at 0 */ |
1dbfa938 | 949 | } else if (!is_power_of_2(pages)) { |
9808143b JO |
950 | char buf[100]; |
951 | ||
33c2dcfd | 952 | /* round pages up to next power of 2 */ |
91529834 | 953 | pages = roundup_pow_of_two(pages); |
1dbfa938 AH |
954 | if (!pages) |
955 | return -EINVAL; | |
9808143b JO |
956 | |
957 | unit_number__scnprintf(buf, sizeof(buf), pages * page_size); | |
958 | pr_info("rounding mmap pages size to %s (%lu pages)\n", | |
959 | buf, pages); | |
2fbe4abe AH |
960 | } |
961 | ||
33c2dcfd DA |
962 | if (pages > max) |
963 | return -EINVAL; | |
964 | ||
965 | return pages; | |
966 | } | |
967 | ||
e9db1310 | 968 | int __perf_evlist__parse_mmap_pages(unsigned int *mmap_pages, const char *str) |
33c2dcfd | 969 | { |
33c2dcfd DA |
970 | unsigned long max = UINT_MAX; |
971 | long pages; | |
972 | ||
f5ae9c42 | 973 | if (max > SIZE_MAX / page_size) |
33c2dcfd DA |
974 | max = SIZE_MAX / page_size; |
975 | ||
976 | pages = parse_pages_arg(str, 1, max); | |
977 | if (pages < 0) { | |
978 | pr_err("Invalid argument for --mmap_pages/-m\n"); | |
994a1f78 JO |
979 | return -1; |
980 | } | |
981 | ||
982 | *mmap_pages = pages; | |
983 | return 0; | |
984 | } | |
985 | ||
e9db1310 AH |
986 | int perf_evlist__parse_mmap_pages(const struct option *opt, const char *str, |
987 | int unset __maybe_unused) | |
988 | { | |
989 | return __perf_evlist__parse_mmap_pages(opt->value, str); | |
990 | } | |
991 | ||
c83fa7f2 | 992 | /** |
718c602d | 993 | * perf_evlist__mmap_ex - Create mmaps to receive events. |
c83fa7f2 AH |
994 | * @evlist: list of events |
995 | * @pages: map length in pages | |
996 | * @overwrite: overwrite older events? | |
718c602d AH |
997 | * @auxtrace_pages - auxtrace map length in pages |
998 | * @auxtrace_overwrite - overwrite older auxtrace data? | |
f8a95309 | 999 | * |
c83fa7f2 AH |
1000 | * If @overwrite is %false the user needs to signal event consumption using |
1001 | * perf_mmap__write_tail(). Using perf_evlist__mmap_read() does this | |
1002 | * automatically. | |
7e2ed097 | 1003 | * |
718c602d AH |
1004 | * Similarly, if @auxtrace_overwrite is %false the user needs to signal data |
1005 | * consumption using auxtrace_mmap__write_tail(). | |
1006 | * | |
c83fa7f2 | 1007 | * Return: %0 on success, negative error code otherwise. |
f8a95309 | 1008 | */ |
63503dba | 1009 | int perf_evlist__mmap_ex(struct evlist *evlist, unsigned int pages, |
7a276ff6 | 1010 | unsigned int auxtrace_pages, |
51255a8a AB |
1011 | bool auxtrace_overwrite, int nr_cblocks, int affinity, int flush, |
1012 | int comp_level) | |
f8a95309 | 1013 | { |
32dcd021 | 1014 | struct evsel *evsel; |
f854839b | 1015 | const struct perf_cpu_map *cpus = evlist->cpus; |
9749b90e | 1016 | const struct perf_thread_map *threads = evlist->threads; |
71f566a3 WN |
1017 | /* |
1018 | * Delay setting mp.prot: set it before calling perf_mmap__mmap. | |
1019 | * Its value is decided by evsel's write_backward. | |
1020 | * So &mp should not be passed through const pointer. | |
1021 | */ | |
51255a8a AB |
1022 | struct mmap_params mp = { .nr_cblocks = nr_cblocks, .affinity = affinity, .flush = flush, |
1023 | .comp_level = comp_level }; | |
50a682ce | 1024 | |
8db6d6b1 | 1025 | if (!evlist->mmap) |
2c5f6d87 | 1026 | evlist->mmap = perf_evlist__alloc_mmap(evlist, false); |
8db6d6b1 | 1027 | if (!evlist->mmap) |
f8a95309 ACM |
1028 | return -ENOMEM; |
1029 | ||
1b85337d | 1030 | if (evlist->pollfd.entries == NULL && perf_evlist__alloc_pollfd(evlist) < 0) |
f8a95309 ACM |
1031 | return -ENOMEM; |
1032 | ||
994a1f78 | 1033 | evlist->mmap_len = perf_evlist__mmap_size(pages); |
2af68ef5 | 1034 | pr_debug("mmap size %zuB\n", evlist->mmap_len); |
a8a8f3eb | 1035 | mp.mask = evlist->mmap_len - page_size - 1; |
f8a95309 | 1036 | |
718c602d AH |
1037 | auxtrace_mmap_params__init(&mp.auxtrace_mp, evlist->mmap_len, |
1038 | auxtrace_pages, auxtrace_overwrite); | |
1039 | ||
e5cadb93 | 1040 | evlist__for_each_entry(evlist, evsel) { |
f8a95309 | 1041 | if ((evsel->attr.read_format & PERF_FORMAT_ID) && |
a91e5431 | 1042 | evsel->sample_id == NULL && |
a14bb7a6 | 1043 | perf_evsel__alloc_id(evsel, cpu_map__nr(cpus), threads->nr) < 0) |
f8a95309 | 1044 | return -ENOMEM; |
f8a95309 ACM |
1045 | } |
1046 | ||
ec1e7e43 | 1047 | if (cpu_map__empty(cpus)) |
a8a8f3eb | 1048 | return perf_evlist__mmap_per_thread(evlist, &mp); |
f8a95309 | 1049 | |
a8a8f3eb | 1050 | return perf_evlist__mmap_per_cpu(evlist, &mp); |
f8a95309 | 1051 | } |
7e2ed097 | 1052 | |
63503dba | 1053 | int perf_evlist__mmap(struct evlist *evlist, unsigned int pages) |
718c602d | 1054 | { |
51255a8a | 1055 | return perf_evlist__mmap_ex(evlist, pages, 0, false, 0, PERF_AFFINITY_SYS, 1, 0); |
718c602d AH |
1056 | } |
1057 | ||
63503dba | 1058 | int perf_evlist__create_maps(struct evlist *evlist, struct target *target) |
7e2ed097 | 1059 | { |
147c508f | 1060 | bool all_threads = (target->per_thread && target->system_wide); |
f854839b | 1061 | struct perf_cpu_map *cpus; |
9749b90e | 1062 | struct perf_thread_map *threads; |
7e2ed097 | 1063 | |
147c508f JY |
1064 | /* |
1065 | * If specify '-a' and '--per-thread' to perf record, perf record | |
1066 | * will override '--per-thread'. target->per_thread = false and | |
1067 | * target->system_wide = true. | |
1068 | * | |
1069 | * If specify '--per-thread' only to perf record, | |
1070 | * target->per_thread = true and target->system_wide = false. | |
1071 | * | |
1072 | * So target->per_thread && target->system_wide is false. | |
1073 | * For perf record, thread_map__new_str doesn't call | |
1074 | * thread_map__new_all_cpus. That will keep perf record's | |
1075 | * current behavior. | |
1076 | * | |
1077 | * For perf stat, it allows the case that target->per_thread and | |
1078 | * target->system_wide are all true. It means to collect system-wide | |
1079 | * per-thread data. thread_map__new_str will call | |
1080 | * thread_map__new_all_cpus to enumerate all threads. | |
1081 | */ | |
73c0ca1e | 1082 | threads = thread_map__new_str(target->pid, target->tid, target->uid, |
147c508f | 1083 | all_threads); |
7e2ed097 | 1084 | |
74bfd2b2 | 1085 | if (!threads) |
7e2ed097 ACM |
1086 | return -1; |
1087 | ||
9c105fbc | 1088 | if (target__uses_dummy_map(target)) |
74bfd2b2 | 1089 | cpus = cpu_map__dummy_new(); |
879d77d0 | 1090 | else |
74bfd2b2 | 1091 | cpus = cpu_map__new(target->cpu_list); |
7e2ed097 | 1092 | |
74bfd2b2 | 1093 | if (!cpus) |
7e2ed097 ACM |
1094 | goto out_delete_threads; |
1095 | ||
ec9a77a7 AH |
1096 | evlist->has_user_cpus = !!target->cpu_list; |
1097 | ||
74bfd2b2 | 1098 | perf_evlist__set_maps(evlist, cpus, threads); |
d5bc056e AH |
1099 | |
1100 | return 0; | |
7e2ed097 ACM |
1101 | |
1102 | out_delete_threads: | |
74bfd2b2 | 1103 | thread_map__put(threads); |
7e2ed097 ACM |
1104 | return -1; |
1105 | } | |
1106 | ||
63503dba | 1107 | void perf_evlist__set_maps(struct evlist *evlist, struct perf_cpu_map *cpus, |
9749b90e | 1108 | struct perf_thread_map *threads) |
3de5cfb0 | 1109 | { |
934e0f20 AH |
1110 | /* |
1111 | * Allow for the possibility that one or another of the maps isn't being | |
1112 | * changed i.e. don't put it. Note we are assuming the maps that are | |
1113 | * being applied are brand new and evlist is taking ownership of the | |
1114 | * original reference count of 1. If that is not the case it is up to | |
1115 | * the caller to increase the reference count. | |
1116 | */ | |
1117 | if (cpus != evlist->cpus) { | |
3de5cfb0 | 1118 | cpu_map__put(evlist->cpus); |
a55e5663 | 1119 | evlist->cpus = cpu_map__get(cpus); |
934e0f20 | 1120 | } |
3de5cfb0 | 1121 | |
934e0f20 | 1122 | if (threads != evlist->threads) { |
3de5cfb0 | 1123 | thread_map__put(evlist->threads); |
a55e5663 | 1124 | evlist->threads = thread_map__get(threads); |
934e0f20 | 1125 | } |
3de5cfb0 | 1126 | |
ec9a77a7 | 1127 | perf_evlist__propagate_maps(evlist); |
3de5cfb0 JO |
1128 | } |
1129 | ||
63503dba | 1130 | void __perf_evlist__set_sample_bit(struct evlist *evlist, |
22c8a376 ACM |
1131 | enum perf_event_sample_format bit) |
1132 | { | |
32dcd021 | 1133 | struct evsel *evsel; |
22c8a376 | 1134 | |
e5cadb93 | 1135 | evlist__for_each_entry(evlist, evsel) |
22c8a376 ACM |
1136 | __perf_evsel__set_sample_bit(evsel, bit); |
1137 | } | |
1138 | ||
63503dba | 1139 | void __perf_evlist__reset_sample_bit(struct evlist *evlist, |
22c8a376 ACM |
1140 | enum perf_event_sample_format bit) |
1141 | { | |
32dcd021 | 1142 | struct evsel *evsel; |
22c8a376 | 1143 | |
e5cadb93 | 1144 | evlist__for_each_entry(evlist, evsel) |
22c8a376 ACM |
1145 | __perf_evsel__reset_sample_bit(evsel, bit); |
1146 | } | |
1147 | ||
63503dba | 1148 | int perf_evlist__apply_filters(struct evlist *evlist, struct evsel **err_evsel) |
0a102479 | 1149 | { |
32dcd021 | 1150 | struct evsel *evsel; |
745cefc5 | 1151 | int err = 0; |
0a102479 | 1152 | |
e5cadb93 | 1153 | evlist__for_each_entry(evlist, evsel) { |
745cefc5 | 1154 | if (evsel->filter == NULL) |
0a102479 | 1155 | continue; |
745cefc5 | 1156 | |
d988d5ee KL |
1157 | /* |
1158 | * filters only work for tracepoint event, which doesn't have cpu limit. | |
1159 | * So evlist and evsel should always be same. | |
1160 | */ | |
475fb533 | 1161 | err = perf_evsel__apply_filter(evsel, evsel->filter); |
23d4aad4 ACM |
1162 | if (err) { |
1163 | *err_evsel = evsel; | |
745cefc5 | 1164 | break; |
23d4aad4 | 1165 | } |
0a102479 FW |
1166 | } |
1167 | ||
745cefc5 ACM |
1168 | return err; |
1169 | } | |
1170 | ||
63503dba | 1171 | int perf_evlist__set_tp_filter(struct evlist *evlist, const char *filter) |
745cefc5 | 1172 | { |
32dcd021 | 1173 | struct evsel *evsel; |
745cefc5 | 1174 | int err = 0; |
745cefc5 | 1175 | |
e5cadb93 | 1176 | evlist__for_each_entry(evlist, evsel) { |
fdf14720 WN |
1177 | if (evsel->attr.type != PERF_TYPE_TRACEPOINT) |
1178 | continue; | |
1179 | ||
94ad89bc | 1180 | err = perf_evsel__set_filter(evsel, filter); |
745cefc5 ACM |
1181 | if (err) |
1182 | break; | |
1183 | } | |
1184 | ||
1185 | return err; | |
0a102479 | 1186 | } |
74429964 | 1187 | |
63503dba | 1188 | int perf_evlist__set_tp_filter_pids(struct evlist *evlist, size_t npids, pid_t *pids) |
cfd70a26 ACM |
1189 | { |
1190 | char *filter; | |
be199ada ACM |
1191 | int ret = -1; |
1192 | size_t i; | |
cfd70a26 | 1193 | |
be199ada ACM |
1194 | for (i = 0; i < npids; ++i) { |
1195 | if (i == 0) { | |
1196 | if (asprintf(&filter, "common_pid != %d", pids[i]) < 0) | |
1197 | return -1; | |
1198 | } else { | |
1199 | char *tmp; | |
1200 | ||
1201 | if (asprintf(&tmp, "%s && common_pid != %d", filter, pids[i]) < 0) | |
1202 | goto out_free; | |
1203 | ||
1204 | free(filter); | |
1205 | filter = tmp; | |
1206 | } | |
1207 | } | |
cfd70a26 | 1208 | |
7ad92a33 | 1209 | ret = perf_evlist__set_tp_filter(evlist, filter); |
be199ada | 1210 | out_free: |
cfd70a26 ACM |
1211 | free(filter); |
1212 | return ret; | |
1213 | } | |
1214 | ||
63503dba | 1215 | int perf_evlist__set_tp_filter_pid(struct evlist *evlist, pid_t pid) |
be199ada | 1216 | { |
7ad92a33 | 1217 | return perf_evlist__set_tp_filter_pids(evlist, 1, &pid); |
be199ada ACM |
1218 | } |
1219 | ||
63503dba | 1220 | bool perf_evlist__valid_sample_type(struct evlist *evlist) |
74429964 | 1221 | { |
32dcd021 | 1222 | struct evsel *pos; |
c2a70653 | 1223 | |
75562573 AH |
1224 | if (evlist->nr_entries == 1) |
1225 | return true; | |
1226 | ||
1227 | if (evlist->id_pos < 0 || evlist->is_pos < 0) | |
1228 | return false; | |
1229 | ||
e5cadb93 | 1230 | evlist__for_each_entry(evlist, pos) { |
75562573 AH |
1231 | if (pos->id_pos != evlist->id_pos || |
1232 | pos->is_pos != evlist->is_pos) | |
c2a70653 | 1233 | return false; |
74429964 FW |
1234 | } |
1235 | ||
c2a70653 | 1236 | return true; |
74429964 FW |
1237 | } |
1238 | ||
63503dba | 1239 | u64 __perf_evlist__combined_sample_type(struct evlist *evlist) |
c2a70653 | 1240 | { |
32dcd021 | 1241 | struct evsel *evsel; |
75562573 AH |
1242 | |
1243 | if (evlist->combined_sample_type) | |
1244 | return evlist->combined_sample_type; | |
1245 | ||
e5cadb93 | 1246 | evlist__for_each_entry(evlist, evsel) |
75562573 AH |
1247 | evlist->combined_sample_type |= evsel->attr.sample_type; |
1248 | ||
1249 | return evlist->combined_sample_type; | |
1250 | } | |
1251 | ||
63503dba | 1252 | u64 perf_evlist__combined_sample_type(struct evlist *evlist) |
75562573 AH |
1253 | { |
1254 | evlist->combined_sample_type = 0; | |
1255 | return __perf_evlist__combined_sample_type(evlist); | |
c2a70653 ACM |
1256 | } |
1257 | ||
63503dba | 1258 | u64 perf_evlist__combined_branch_type(struct evlist *evlist) |
98df858e | 1259 | { |
32dcd021 | 1260 | struct evsel *evsel; |
98df858e AK |
1261 | u64 branch_type = 0; |
1262 | ||
e5cadb93 | 1263 | evlist__for_each_entry(evlist, evsel) |
98df858e AK |
1264 | branch_type |= evsel->attr.branch_sample_type; |
1265 | return branch_type; | |
1266 | } | |
1267 | ||
63503dba | 1268 | bool perf_evlist__valid_read_format(struct evlist *evlist) |
9ede473c | 1269 | { |
32dcd021 | 1270 | struct evsel *first = perf_evlist__first(evlist), *pos = first; |
9ede473c JO |
1271 | u64 read_format = first->attr.read_format; |
1272 | u64 sample_type = first->attr.sample_type; | |
1273 | ||
e5cadb93 | 1274 | evlist__for_each_entry(evlist, pos) { |
9ede473c JO |
1275 | if (read_format != pos->attr.read_format) |
1276 | return false; | |
1277 | } | |
1278 | ||
1279 | /* PERF_SAMPLE_READ imples PERF_FORMAT_ID. */ | |
1280 | if ((sample_type & PERF_SAMPLE_READ) && | |
1281 | !(read_format & PERF_FORMAT_ID)) { | |
1282 | return false; | |
1283 | } | |
1284 | ||
1285 | return true; | |
1286 | } | |
1287 | ||
63503dba | 1288 | u64 perf_evlist__read_format(struct evlist *evlist) |
9ede473c | 1289 | { |
32dcd021 | 1290 | struct evsel *first = perf_evlist__first(evlist); |
9ede473c JO |
1291 | return first->attr.read_format; |
1292 | } | |
1293 | ||
63503dba | 1294 | u16 perf_evlist__id_hdr_size(struct evlist *evlist) |
81e36bff | 1295 | { |
32dcd021 | 1296 | struct evsel *first = perf_evlist__first(evlist); |
81e36bff ACM |
1297 | struct perf_sample *data; |
1298 | u64 sample_type; | |
1299 | u16 size = 0; | |
1300 | ||
81e36bff ACM |
1301 | if (!first->attr.sample_id_all) |
1302 | goto out; | |
1303 | ||
1304 | sample_type = first->attr.sample_type; | |
1305 | ||
1306 | if (sample_type & PERF_SAMPLE_TID) | |
1307 | size += sizeof(data->tid) * 2; | |
1308 | ||
1309 | if (sample_type & PERF_SAMPLE_TIME) | |
1310 | size += sizeof(data->time); | |
1311 | ||
1312 | if (sample_type & PERF_SAMPLE_ID) | |
1313 | size += sizeof(data->id); | |
1314 | ||
1315 | if (sample_type & PERF_SAMPLE_STREAM_ID) | |
1316 | size += sizeof(data->stream_id); | |
1317 | ||
1318 | if (sample_type & PERF_SAMPLE_CPU) | |
1319 | size += sizeof(data->cpu) * 2; | |
75562573 AH |
1320 | |
1321 | if (sample_type & PERF_SAMPLE_IDENTIFIER) | |
1322 | size += sizeof(data->id); | |
81e36bff ACM |
1323 | out: |
1324 | return size; | |
1325 | } | |
1326 | ||
63503dba | 1327 | bool perf_evlist__valid_sample_id_all(struct evlist *evlist) |
74429964 | 1328 | { |
32dcd021 | 1329 | struct evsel *first = perf_evlist__first(evlist), *pos = first; |
c2a70653 | 1330 | |
e5cadb93 | 1331 | evlist__for_each_entry_continue(evlist, pos) { |
c2a70653 ACM |
1332 | if (first->attr.sample_id_all != pos->attr.sample_id_all) |
1333 | return false; | |
74429964 FW |
1334 | } |
1335 | ||
c2a70653 ACM |
1336 | return true; |
1337 | } | |
1338 | ||
63503dba | 1339 | bool perf_evlist__sample_id_all(struct evlist *evlist) |
c2a70653 | 1340 | { |
32dcd021 | 1341 | struct evsel *first = perf_evlist__first(evlist); |
c2a70653 | 1342 | return first->attr.sample_id_all; |
74429964 | 1343 | } |
81cce8de | 1344 | |
63503dba | 1345 | void perf_evlist__set_selected(struct evlist *evlist, |
32dcd021 | 1346 | struct evsel *evsel) |
81cce8de ACM |
1347 | { |
1348 | evlist->selected = evsel; | |
1349 | } | |
727ab04e | 1350 | |
63503dba | 1351 | void perf_evlist__close(struct evlist *evlist) |
a74b4b66 | 1352 | { |
32dcd021 | 1353 | struct evsel *evsel; |
a74b4b66 | 1354 | |
475fb533 AK |
1355 | evlist__for_each_entry_reverse(evlist, evsel) |
1356 | perf_evsel__close(evsel); | |
a74b4b66 NK |
1357 | } |
1358 | ||
63503dba | 1359 | static int perf_evlist__create_syswide_maps(struct evlist *evlist) |
4112eb18 | 1360 | { |
f854839b | 1361 | struct perf_cpu_map *cpus; |
9749b90e | 1362 | struct perf_thread_map *threads; |
4112eb18 ACM |
1363 | int err = -ENOMEM; |
1364 | ||
1365 | /* | |
1366 | * Try reading /sys/devices/system/cpu/online to get | |
1367 | * an all cpus map. | |
1368 | * | |
1369 | * FIXME: -ENOMEM is the best we can do here, the cpu_map | |
1370 | * code needs an overhaul to properly forward the | |
1371 | * error, and we may not want to do that fallback to a | |
1372 | * default cpu identity map :-\ | |
1373 | */ | |
8c0498b6 AH |
1374 | cpus = cpu_map__new(NULL); |
1375 | if (!cpus) | |
4112eb18 ACM |
1376 | goto out; |
1377 | ||
8c0498b6 AH |
1378 | threads = thread_map__new_dummy(); |
1379 | if (!threads) | |
1380 | goto out_put; | |
4112eb18 | 1381 | |
8c0498b6 | 1382 | perf_evlist__set_maps(evlist, cpus, threads); |
4112eb18 ACM |
1383 | out: |
1384 | return err; | |
8c0498b6 AH |
1385 | out_put: |
1386 | cpu_map__put(cpus); | |
4112eb18 ACM |
1387 | goto out; |
1388 | } | |
1389 | ||
63503dba | 1390 | int perf_evlist__open(struct evlist *evlist) |
727ab04e | 1391 | { |
32dcd021 | 1392 | struct evsel *evsel; |
a74b4b66 | 1393 | int err; |
727ab04e | 1394 | |
4112eb18 ACM |
1395 | /* |
1396 | * Default: one fd per CPU, all threads, aka systemwide | |
1397 | * as sys_perf_event_open(cpu = -1, thread = -1) is EINVAL | |
1398 | */ | |
1399 | if (evlist->threads == NULL && evlist->cpus == NULL) { | |
1400 | err = perf_evlist__create_syswide_maps(evlist); | |
1401 | if (err < 0) | |
1402 | goto out_err; | |
1403 | } | |
1404 | ||
733cd2fe AH |
1405 | perf_evlist__update_id_pos(evlist); |
1406 | ||
e5cadb93 | 1407 | evlist__for_each_entry(evlist, evsel) { |
23df7f79 | 1408 | err = perf_evsel__open(evsel, evsel->cpus, evsel->threads); |
727ab04e ACM |
1409 | if (err < 0) |
1410 | goto out_err; | |
1411 | } | |
1412 | ||
1413 | return 0; | |
1414 | out_err: | |
a74b4b66 | 1415 | perf_evlist__close(evlist); |
41c21a68 | 1416 | errno = -err; |
727ab04e ACM |
1417 | return err; |
1418 | } | |
35b9d88e | 1419 | |
63503dba | 1420 | int perf_evlist__prepare_workload(struct evlist *evlist, struct target *target, |
55e162ea | 1421 | const char *argv[], bool pipe_output, |
735f7e0b | 1422 | void (*exec_error)(int signo, siginfo_t *info, void *ucontext)) |
35b9d88e ACM |
1423 | { |
1424 | int child_ready_pipe[2], go_pipe[2]; | |
1425 | char bf; | |
1426 | ||
1427 | if (pipe(child_ready_pipe) < 0) { | |
1428 | perror("failed to create 'ready' pipe"); | |
1429 | return -1; | |
1430 | } | |
1431 | ||
1432 | if (pipe(go_pipe) < 0) { | |
1433 | perror("failed to create 'go' pipe"); | |
1434 | goto out_close_ready_pipe; | |
1435 | } | |
1436 | ||
1437 | evlist->workload.pid = fork(); | |
1438 | if (evlist->workload.pid < 0) { | |
1439 | perror("failed to fork"); | |
1440 | goto out_close_pipes; | |
1441 | } | |
1442 | ||
1443 | if (!evlist->workload.pid) { | |
5f1c4225 ACM |
1444 | int ret; |
1445 | ||
119fa3c9 | 1446 | if (pipe_output) |
35b9d88e ACM |
1447 | dup2(2, 1); |
1448 | ||
0817df08 DA |
1449 | signal(SIGTERM, SIG_DFL); |
1450 | ||
35b9d88e ACM |
1451 | close(child_ready_pipe[0]); |
1452 | close(go_pipe[1]); | |
1453 | fcntl(go_pipe[0], F_SETFD, FD_CLOEXEC); | |
1454 | ||
35b9d88e ACM |
1455 | /* |
1456 | * Tell the parent we're ready to go | |
1457 | */ | |
1458 | close(child_ready_pipe[1]); | |
1459 | ||
1460 | /* | |
1461 | * Wait until the parent tells us to go. | |
1462 | */ | |
5f1c4225 ACM |
1463 | ret = read(go_pipe[0], &bf, 1); |
1464 | /* | |
1465 | * The parent will ask for the execvp() to be performed by | |
1466 | * writing exactly one byte, in workload.cork_fd, usually via | |
1467 | * perf_evlist__start_workload(). | |
1468 | * | |
20f86fc1 | 1469 | * For cancelling the workload without actually running it, |
5f1c4225 ACM |
1470 | * the parent will just close workload.cork_fd, without writing |
1471 | * anything, i.e. read will return zero and we just exit() | |
1472 | * here. | |
1473 | */ | |
1474 | if (ret != 1) { | |
1475 | if (ret == -1) | |
1476 | perror("unable to read pipe"); | |
1477 | exit(ret); | |
1478 | } | |
35b9d88e ACM |
1479 | |
1480 | execvp(argv[0], (char **)argv); | |
1481 | ||
735f7e0b | 1482 | if (exec_error) { |
f33cbe72 ACM |
1483 | union sigval val; |
1484 | ||
1485 | val.sival_int = errno; | |
1486 | if (sigqueue(getppid(), SIGUSR1, val)) | |
1487 | perror(argv[0]); | |
1488 | } else | |
1489 | perror(argv[0]); | |
35b9d88e ACM |
1490 | exit(-1); |
1491 | } | |
1492 | ||
735f7e0b ACM |
1493 | if (exec_error) { |
1494 | struct sigaction act = { | |
1495 | .sa_flags = SA_SIGINFO, | |
1496 | .sa_sigaction = exec_error, | |
1497 | }; | |
1498 | sigaction(SIGUSR1, &act, NULL); | |
1499 | } | |
1500 | ||
1aaf63b1 ACM |
1501 | if (target__none(target)) { |
1502 | if (evlist->threads == NULL) { | |
1503 | fprintf(stderr, "FATAL: evlist->threads need to be set at this point (%s:%d).\n", | |
1504 | __func__, __LINE__); | |
1505 | goto out_close_pipes; | |
1506 | } | |
e13798c7 | 1507 | thread_map__set_pid(evlist->threads, 0, evlist->workload.pid); |
1aaf63b1 | 1508 | } |
35b9d88e ACM |
1509 | |
1510 | close(child_ready_pipe[1]); | |
1511 | close(go_pipe[0]); | |
1512 | /* | |
1513 | * wait for child to settle | |
1514 | */ | |
1515 | if (read(child_ready_pipe[0], &bf, 1) == -1) { | |
1516 | perror("unable to read pipe"); | |
1517 | goto out_close_pipes; | |
1518 | } | |
1519 | ||
bcf3145f | 1520 | fcntl(go_pipe[1], F_SETFD, FD_CLOEXEC); |
35b9d88e ACM |
1521 | evlist->workload.cork_fd = go_pipe[1]; |
1522 | close(child_ready_pipe[0]); | |
1523 | return 0; | |
1524 | ||
1525 | out_close_pipes: | |
1526 | close(go_pipe[0]); | |
1527 | close(go_pipe[1]); | |
1528 | out_close_ready_pipe: | |
1529 | close(child_ready_pipe[0]); | |
1530 | close(child_ready_pipe[1]); | |
1531 | return -1; | |
1532 | } | |
1533 | ||
63503dba | 1534 | int perf_evlist__start_workload(struct evlist *evlist) |
35b9d88e ACM |
1535 | { |
1536 | if (evlist->workload.cork_fd > 0) { | |
b3824404 | 1537 | char bf = 0; |
bcf3145f | 1538 | int ret; |
35b9d88e ACM |
1539 | /* |
1540 | * Remove the cork, let it rip! | |
1541 | */ | |
bcf3145f NK |
1542 | ret = write(evlist->workload.cork_fd, &bf, 1); |
1543 | if (ret < 0) | |
e978be9e | 1544 | perror("unable to write to pipe"); |
bcf3145f NK |
1545 | |
1546 | close(evlist->workload.cork_fd); | |
1547 | return ret; | |
35b9d88e ACM |
1548 | } |
1549 | ||
1550 | return 0; | |
1551 | } | |
cb0b29e0 | 1552 | |
63503dba | 1553 | int perf_evlist__parse_sample(struct evlist *evlist, union perf_event *event, |
0807d2d8 | 1554 | struct perf_sample *sample) |
cb0b29e0 | 1555 | { |
32dcd021 | 1556 | struct evsel *evsel = perf_evlist__event2evsel(evlist, event); |
75562573 AH |
1557 | |
1558 | if (!evsel) | |
1559 | return -EFAULT; | |
0807d2d8 | 1560 | return perf_evsel__parse_sample(evsel, event, sample); |
cb0b29e0 | 1561 | } |
78f067b3 | 1562 | |
63503dba | 1563 | int perf_evlist__parse_sample_timestamp(struct evlist *evlist, |
01468120 JO |
1564 | union perf_event *event, |
1565 | u64 *timestamp) | |
1566 | { | |
32dcd021 | 1567 | struct evsel *evsel = perf_evlist__event2evsel(evlist, event); |
01468120 JO |
1568 | |
1569 | if (!evsel) | |
1570 | return -EFAULT; | |
1571 | return perf_evsel__parse_sample_timestamp(evsel, event, timestamp); | |
1572 | } | |
1573 | ||
63503dba | 1574 | size_t perf_evlist__fprintf(struct evlist *evlist, FILE *fp) |
78f067b3 | 1575 | { |
32dcd021 | 1576 | struct evsel *evsel; |
78f067b3 ACM |
1577 | size_t printed = 0; |
1578 | ||
e5cadb93 | 1579 | evlist__for_each_entry(evlist, evsel) { |
78f067b3 ACM |
1580 | printed += fprintf(fp, "%s%s", evsel->idx ? ", " : "", |
1581 | perf_evsel__name(evsel)); | |
1582 | } | |
1583 | ||
b2222139 | 1584 | return printed + fprintf(fp, "\n"); |
78f067b3 | 1585 | } |
6ef068cb | 1586 | |
63503dba | 1587 | int perf_evlist__strerror_open(struct evlist *evlist, |
a8f23d8f ACM |
1588 | int err, char *buf, size_t size) |
1589 | { | |
1590 | int printed, value; | |
c8b5f2c9 | 1591 | char sbuf[STRERR_BUFSIZE], *emsg = str_error_r(err, sbuf, sizeof(sbuf)); |
a8f23d8f ACM |
1592 | |
1593 | switch (err) { | |
1594 | case EACCES: | |
1595 | case EPERM: | |
1596 | printed = scnprintf(buf, size, | |
1597 | "Error:\t%s.\n" | |
1598 | "Hint:\tCheck /proc/sys/kernel/perf_event_paranoid setting.", emsg); | |
1599 | ||
1a47245d | 1600 | value = perf_event_paranoid(); |
a8f23d8f ACM |
1601 | |
1602 | printed += scnprintf(buf + printed, size - printed, "\nHint:\t"); | |
1603 | ||
1604 | if (value >= 2) { | |
1605 | printed += scnprintf(buf + printed, size - printed, | |
1606 | "For your workloads it needs to be <= 1\nHint:\t"); | |
1607 | } | |
1608 | printed += scnprintf(buf + printed, size - printed, | |
5229e366 | 1609 | "For system wide tracing it needs to be set to -1.\n"); |
a8f23d8f ACM |
1610 | |
1611 | printed += scnprintf(buf + printed, size - printed, | |
5229e366 ACM |
1612 | "Hint:\tTry: 'sudo sh -c \"echo -1 > /proc/sys/kernel/perf_event_paranoid\"'\n" |
1613 | "Hint:\tThe current value is %d.", value); | |
a8f23d8f | 1614 | break; |
d9aade7f | 1615 | case EINVAL: { |
32dcd021 | 1616 | struct evsel *first = perf_evlist__first(evlist); |
d9aade7f ACM |
1617 | int max_freq; |
1618 | ||
1619 | if (sysctl__read_int("kernel/perf_event_max_sample_rate", &max_freq) < 0) | |
1620 | goto out_default; | |
1621 | ||
1622 | if (first->attr.sample_freq < (u64)max_freq) | |
1623 | goto out_default; | |
1624 | ||
1625 | printed = scnprintf(buf, size, | |
1626 | "Error:\t%s.\n" | |
1627 | "Hint:\tCheck /proc/sys/kernel/perf_event_max_sample_rate.\n" | |
1628 | "Hint:\tThe current value is %d and %" PRIu64 " is being requested.", | |
1629 | emsg, max_freq, first->attr.sample_freq); | |
1630 | break; | |
1631 | } | |
a8f23d8f | 1632 | default: |
d9aade7f | 1633 | out_default: |
a8f23d8f ACM |
1634 | scnprintf(buf, size, "%s", emsg); |
1635 | break; | |
1636 | } | |
1637 | ||
1638 | return 0; | |
1639 | } | |
a025e4f0 | 1640 | |
63503dba | 1641 | int perf_evlist__strerror_mmap(struct evlist *evlist, int err, char *buf, size_t size) |
956fa571 | 1642 | { |
c8b5f2c9 | 1643 | char sbuf[STRERR_BUFSIZE], *emsg = str_error_r(err, sbuf, sizeof(sbuf)); |
e965bea1 | 1644 | int pages_attempted = evlist->mmap_len / 1024, pages_max_per_user, printed = 0; |
956fa571 ACM |
1645 | |
1646 | switch (err) { | |
1647 | case EPERM: | |
e5d4a290 | 1648 | sysctl__read_int("kernel/perf_event_mlock_kb", &pages_max_per_user); |
e965bea1 ACM |
1649 | printed += scnprintf(buf + printed, size - printed, |
1650 | "Error:\t%s.\n" | |
956fa571 | 1651 | "Hint:\tCheck /proc/sys/kernel/perf_event_mlock_kb (%d kB) setting.\n" |
e965bea1 | 1652 | "Hint:\tTried using %zd kB.\n", |
e5d4a290 | 1653 | emsg, pages_max_per_user, pages_attempted); |
e965bea1 ACM |
1654 | |
1655 | if (pages_attempted >= pages_max_per_user) { | |
1656 | printed += scnprintf(buf + printed, size - printed, | |
1657 | "Hint:\tTry 'sudo sh -c \"echo %d > /proc/sys/kernel/perf_event_mlock_kb\"', or\n", | |
1658 | pages_max_per_user + pages_attempted); | |
1659 | } | |
1660 | ||
1661 | printed += scnprintf(buf + printed, size - printed, | |
1662 | "Hint:\tTry using a smaller -m/--mmap-pages value."); | |
956fa571 ACM |
1663 | break; |
1664 | default: | |
1665 | scnprintf(buf, size, "%s", emsg); | |
1666 | break; | |
1667 | } | |
1668 | ||
1669 | return 0; | |
1670 | } | |
1671 | ||
63503dba | 1672 | void perf_evlist__to_front(struct evlist *evlist, |
32dcd021 | 1673 | struct evsel *move_evsel) |
a025e4f0 | 1674 | { |
32dcd021 | 1675 | struct evsel *evsel, *n; |
a025e4f0 AH |
1676 | LIST_HEAD(move); |
1677 | ||
1678 | if (move_evsel == perf_evlist__first(evlist)) | |
1679 | return; | |
1680 | ||
e5cadb93 | 1681 | evlist__for_each_entry_safe(evlist, n, evsel) { |
a025e4f0 AH |
1682 | if (evsel->leader == move_evsel->leader) |
1683 | list_move_tail(&evsel->node, &move); | |
1684 | } | |
1685 | ||
1686 | list_splice(&move, &evlist->entries); | |
1687 | } | |
60b0896c | 1688 | |
63503dba | 1689 | void perf_evlist__set_tracking_event(struct evlist *evlist, |
32dcd021 | 1690 | struct evsel *tracking_evsel) |
60b0896c | 1691 | { |
32dcd021 | 1692 | struct evsel *evsel; |
60b0896c AH |
1693 | |
1694 | if (tracking_evsel->tracking) | |
1695 | return; | |
1696 | ||
e5cadb93 | 1697 | evlist__for_each_entry(evlist, evsel) { |
60b0896c AH |
1698 | if (evsel != tracking_evsel) |
1699 | evsel->tracking = false; | |
1700 | } | |
1701 | ||
1702 | tracking_evsel->tracking = true; | |
1703 | } | |
7630b3e2 | 1704 | |
32dcd021 | 1705 | struct evsel * |
63503dba | 1706 | perf_evlist__find_evsel_by_str(struct evlist *evlist, |
7630b3e2 WN |
1707 | const char *str) |
1708 | { | |
32dcd021 | 1709 | struct evsel *evsel; |
7630b3e2 | 1710 | |
e5cadb93 | 1711 | evlist__for_each_entry(evlist, evsel) { |
7630b3e2 WN |
1712 | if (!evsel->name) |
1713 | continue; | |
1714 | if (strcmp(str, evsel->name) == 0) | |
1715 | return evsel; | |
1716 | } | |
1717 | ||
1718 | return NULL; | |
1719 | } | |
54cc54de | 1720 | |
63503dba | 1721 | void perf_evlist__toggle_bkw_mmap(struct evlist *evlist, |
54cc54de WN |
1722 | enum bkw_mmap_state state) |
1723 | { | |
1724 | enum bkw_mmap_state old_state = evlist->bkw_mmap_state; | |
1725 | enum action { | |
1726 | NONE, | |
1727 | PAUSE, | |
1728 | RESUME, | |
1729 | } action = NONE; | |
1730 | ||
0b72d69a | 1731 | if (!evlist->overwrite_mmap) |
54cc54de WN |
1732 | return; |
1733 | ||
1734 | switch (old_state) { | |
1735 | case BKW_MMAP_NOTREADY: { | |
1736 | if (state != BKW_MMAP_RUNNING) | |
dd8bd53a | 1737 | goto state_err; |
54cc54de WN |
1738 | break; |
1739 | } | |
1740 | case BKW_MMAP_RUNNING: { | |
1741 | if (state != BKW_MMAP_DATA_PENDING) | |
1742 | goto state_err; | |
1743 | action = PAUSE; | |
1744 | break; | |
1745 | } | |
1746 | case BKW_MMAP_DATA_PENDING: { | |
1747 | if (state != BKW_MMAP_EMPTY) | |
1748 | goto state_err; | |
1749 | break; | |
1750 | } | |
1751 | case BKW_MMAP_EMPTY: { | |
1752 | if (state != BKW_MMAP_RUNNING) | |
1753 | goto state_err; | |
1754 | action = RESUME; | |
1755 | break; | |
1756 | } | |
1757 | default: | |
1758 | WARN_ONCE(1, "Shouldn't get there\n"); | |
1759 | } | |
1760 | ||
1761 | evlist->bkw_mmap_state = state; | |
1762 | ||
1763 | switch (action) { | |
1764 | case PAUSE: | |
1765 | perf_evlist__pause(evlist); | |
1766 | break; | |
1767 | case RESUME: | |
1768 | perf_evlist__resume(evlist); | |
1769 | break; | |
1770 | case NONE: | |
1771 | default: | |
1772 | break; | |
1773 | } | |
1774 | ||
1775 | state_err: | |
1776 | return; | |
1777 | } | |
07d6f446 | 1778 | |
63503dba | 1779 | bool perf_evlist__exclude_kernel(struct evlist *evlist) |
07d6f446 | 1780 | { |
32dcd021 | 1781 | struct evsel *evsel; |
07d6f446 ACM |
1782 | |
1783 | evlist__for_each_entry(evlist, evsel) { | |
1784 | if (!evsel->attr.exclude_kernel) | |
1785 | return false; | |
1786 | } | |
1787 | ||
1788 | return true; | |
1789 | } | |
e2bdbe80 JY |
1790 | |
1791 | /* | |
1792 | * Events in data file are not collect in groups, but we still want | |
1793 | * the group display. Set the artificial group and set the leader's | |
1794 | * forced_leader flag to notify the display code. | |
1795 | */ | |
63503dba | 1796 | void perf_evlist__force_leader(struct evlist *evlist) |
e2bdbe80 JY |
1797 | { |
1798 | if (!evlist->nr_groups) { | |
32dcd021 | 1799 | struct evsel *leader = perf_evlist__first(evlist); |
e2bdbe80 JY |
1800 | |
1801 | perf_evlist__set_leader(evlist); | |
1802 | leader->forced_leader = true; | |
1803 | } | |
1804 | } | |
c3537fc2 | 1805 | |
63503dba | 1806 | struct evsel *perf_evlist__reset_weak_group(struct evlist *evsel_list, |
32dcd021 | 1807 | struct evsel *evsel) |
c3537fc2 | 1808 | { |
32dcd021 | 1809 | struct evsel *c2, *leader; |
c3537fc2 AK |
1810 | bool is_open = true; |
1811 | ||
1812 | leader = evsel->leader; | |
1813 | pr_debug("Weak group for %s/%d failed\n", | |
1814 | leader->name, leader->nr_members); | |
1815 | ||
1816 | /* | |
1817 | * for_each_group_member doesn't work here because it doesn't | |
1818 | * include the first entry. | |
1819 | */ | |
1820 | evlist__for_each_entry(evsel_list, c2) { | |
1821 | if (c2 == evsel) | |
1822 | is_open = false; | |
1823 | if (c2->leader == leader) { | |
1824 | if (is_open) | |
1825 | perf_evsel__close(c2); | |
1826 | c2->leader = c2; | |
1827 | c2->nr_members = 0; | |
1828 | } | |
1829 | } | |
1830 | return leader; | |
1831 | } | |
657ee553 | 1832 | |
63503dba | 1833 | int perf_evlist__add_sb_event(struct evlist **evlist, |
657ee553 SL |
1834 | struct perf_event_attr *attr, |
1835 | perf_evsel__sb_cb_t cb, | |
1836 | void *data) | |
1837 | { | |
32dcd021 | 1838 | struct evsel *evsel; |
657ee553 SL |
1839 | bool new_evlist = (*evlist) == NULL; |
1840 | ||
1841 | if (*evlist == NULL) | |
1842 | *evlist = perf_evlist__new(); | |
1843 | if (*evlist == NULL) | |
1844 | return -1; | |
1845 | ||
1846 | if (!attr->sample_id_all) { | |
1847 | pr_warning("enabling sample_id_all for all side band events\n"); | |
1848 | attr->sample_id_all = 1; | |
1849 | } | |
1850 | ||
1851 | evsel = perf_evsel__new_idx(attr, (*evlist)->nr_entries); | |
1852 | if (!evsel) | |
1853 | goto out_err; | |
1854 | ||
1855 | evsel->side_band.cb = cb; | |
1856 | evsel->side_band.data = data; | |
1857 | perf_evlist__add(*evlist, evsel); | |
1858 | return 0; | |
1859 | ||
1860 | out_err: | |
1861 | if (new_evlist) { | |
1862 | perf_evlist__delete(*evlist); | |
1863 | *evlist = NULL; | |
1864 | } | |
1865 | return -1; | |
1866 | } | |
1867 | ||
1868 | static void *perf_evlist__poll_thread(void *arg) | |
1869 | { | |
63503dba | 1870 | struct evlist *evlist = arg; |
657ee553 | 1871 | bool draining = false; |
adc6257c JO |
1872 | int i, done = 0; |
1873 | ||
1874 | while (!done) { | |
1875 | bool got_data = false; | |
657ee553 | 1876 | |
adc6257c | 1877 | if (evlist->thread.done) |
657ee553 SL |
1878 | draining = true; |
1879 | ||
1880 | if (!draining) | |
1881 | perf_evlist__poll(evlist, 1000); | |
1882 | ||
1883 | for (i = 0; i < evlist->nr_mmaps; i++) { | |
1884 | struct perf_mmap *map = &evlist->mmap[i]; | |
1885 | union perf_event *event; | |
1886 | ||
1887 | if (perf_mmap__read_init(map)) | |
1888 | continue; | |
1889 | while ((event = perf_mmap__read_event(map)) != NULL) { | |
32dcd021 | 1890 | struct evsel *evsel = perf_evlist__event2evsel(evlist, event); |
657ee553 SL |
1891 | |
1892 | if (evsel && evsel->side_band.cb) | |
1893 | evsel->side_band.cb(event, evsel->side_band.data); | |
1894 | else | |
1895 | pr_warning("cannot locate proper evsel for the side band event\n"); | |
1896 | ||
1897 | perf_mmap__consume(map); | |
adc6257c | 1898 | got_data = true; |
657ee553 SL |
1899 | } |
1900 | perf_mmap__read_done(map); | |
1901 | } | |
adc6257c JO |
1902 | |
1903 | if (draining && !got_data) | |
1904 | break; | |
657ee553 SL |
1905 | } |
1906 | return NULL; | |
1907 | } | |
1908 | ||
63503dba | 1909 | int perf_evlist__start_sb_thread(struct evlist *evlist, |
657ee553 SL |
1910 | struct target *target) |
1911 | { | |
32dcd021 | 1912 | struct evsel *counter; |
657ee553 SL |
1913 | |
1914 | if (!evlist) | |
1915 | return 0; | |
1916 | ||
1917 | if (perf_evlist__create_maps(evlist, target)) | |
1918 | goto out_delete_evlist; | |
1919 | ||
1920 | evlist__for_each_entry(evlist, counter) { | |
1921 | if (perf_evsel__open(counter, evlist->cpus, | |
1922 | evlist->threads) < 0) | |
1923 | goto out_delete_evlist; | |
1924 | } | |
1925 | ||
1926 | if (perf_evlist__mmap(evlist, UINT_MAX)) | |
1927 | goto out_delete_evlist; | |
1928 | ||
1929 | evlist__for_each_entry(evlist, counter) { | |
1930 | if (perf_evsel__enable(counter)) | |
1931 | goto out_delete_evlist; | |
1932 | } | |
1933 | ||
1934 | evlist->thread.done = 0; | |
1935 | if (pthread_create(&evlist->thread.th, NULL, perf_evlist__poll_thread, evlist)) | |
1936 | goto out_delete_evlist; | |
1937 | ||
1938 | return 0; | |
1939 | ||
1940 | out_delete_evlist: | |
1941 | perf_evlist__delete(evlist); | |
1942 | evlist = NULL; | |
1943 | return -1; | |
1944 | } | |
1945 | ||
63503dba | 1946 | void perf_evlist__stop_sb_thread(struct evlist *evlist) |
657ee553 SL |
1947 | { |
1948 | if (!evlist) | |
1949 | return; | |
1950 | evlist->thread.done = 1; | |
1951 | pthread_join(evlist->thread.th, NULL); | |
1952 | perf_evlist__delete(evlist); | |
1953 | } |