Commit | Line | Data |
---|---|---|
f8a95309 ACM |
1 | /* |
2 | * Copyright (C) 2011, Red Hat Inc, Arnaldo Carvalho de Melo <acme@redhat.com> | |
3 | * | |
4 | * Parts came from builtin-{top,stat,record}.c, see those files for further | |
5 | * copyright notes. | |
6 | * | |
7 | * Released under the GPL v2. (and only v2, not any later version) | |
8 | */ | |
a8c9ae18 | 9 | #include "util.h" |
956fa571 | 10 | #include <api/fs/fs.h> |
a43783ae | 11 | #include <errno.h> |
fd20e811 | 12 | #include <inttypes.h> |
5c581041 | 13 | #include <poll.h> |
f8a95309 ACM |
14 | #include "cpumap.h" |
15 | #include "thread_map.h" | |
12864b31 | 16 | #include "target.h" |
361c99a6 ACM |
17 | #include "evlist.h" |
18 | #include "evsel.h" | |
e3e1a54f | 19 | #include "debug.h" |
58db1d6e | 20 | #include "units.h" |
54cc54de | 21 | #include "asm/bug.h" |
9607ad3a | 22 | #include <signal.h> |
35b9d88e | 23 | #include <unistd.h> |
361c99a6 | 24 | |
50d08e47 | 25 | #include "parse-events.h" |
4b6ab94e | 26 | #include <subcmd/parse-options.h> |
50d08e47 | 27 | |
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> |
70db7533 | 35 | |
f8a95309 | 36 | #define FD(e, x, y) (*(int *)xyarray__entry(e->fd, x, y)) |
a91e5431 | 37 | #define SID(e, x, y) xyarray__entry(e->sample_id, x, y) |
f8a95309 | 38 | |
7e2ed097 ACM |
39 | void perf_evlist__init(struct perf_evlist *evlist, struct cpu_map *cpus, |
40 | struct thread_map *threads) | |
ef1d1af2 ACM |
41 | { |
42 | int i; | |
43 | ||
44 | for (i = 0; i < PERF_EVLIST__HLIST_SIZE; ++i) | |
45 | INIT_HLIST_HEAD(&evlist->heads[i]); | |
46 | INIT_LIST_HEAD(&evlist->entries); | |
7e2ed097 | 47 | perf_evlist__set_maps(evlist, cpus, threads); |
1b85337d | 48 | fdarray__init(&evlist->pollfd, 64); |
35b9d88e | 49 | evlist->workload.pid = -1; |
54cc54de | 50 | evlist->bkw_mmap_state = BKW_MMAP_NOTREADY; |
ef1d1af2 ACM |
51 | } |
52 | ||
334fe7a3 | 53 | struct perf_evlist *perf_evlist__new(void) |
361c99a6 ACM |
54 | { |
55 | struct perf_evlist *evlist = zalloc(sizeof(*evlist)); | |
56 | ||
ef1d1af2 | 57 | if (evlist != NULL) |
334fe7a3 | 58 | perf_evlist__init(evlist, NULL, NULL); |
361c99a6 ACM |
59 | |
60 | return evlist; | |
61 | } | |
62 | ||
b22d54b0 JO |
63 | struct perf_evlist *perf_evlist__new_default(void) |
64 | { | |
65 | struct perf_evlist *evlist = perf_evlist__new(); | |
66 | ||
67 | if (evlist && perf_evlist__add_default(evlist)) { | |
68 | perf_evlist__delete(evlist); | |
69 | evlist = NULL; | |
70 | } | |
71 | ||
72 | return evlist; | |
73 | } | |
74 | ||
5bae0250 ACM |
75 | struct perf_evlist *perf_evlist__new_dummy(void) |
76 | { | |
77 | struct perf_evlist *evlist = perf_evlist__new(); | |
78 | ||
79 | if (evlist && perf_evlist__add_dummy(evlist)) { | |
80 | perf_evlist__delete(evlist); | |
81 | evlist = NULL; | |
82 | } | |
83 | ||
84 | return evlist; | |
85 | } | |
86 | ||
75562573 AH |
87 | /** |
88 | * perf_evlist__set_id_pos - set the positions of event ids. | |
89 | * @evlist: selected event list | |
90 | * | |
91 | * Events with compatible sample types all have the same id_pos | |
92 | * and is_pos. For convenience, put a copy on evlist. | |
93 | */ | |
94 | void perf_evlist__set_id_pos(struct perf_evlist *evlist) | |
95 | { | |
96 | struct perf_evsel *first = perf_evlist__first(evlist); | |
97 | ||
98 | evlist->id_pos = first->id_pos; | |
99 | evlist->is_pos = first->is_pos; | |
100 | } | |
101 | ||
733cd2fe AH |
102 | static void perf_evlist__update_id_pos(struct perf_evlist *evlist) |
103 | { | |
104 | struct perf_evsel *evsel; | |
105 | ||
e5cadb93 | 106 | evlist__for_each_entry(evlist, evsel) |
733cd2fe AH |
107 | perf_evsel__calc_id_pos(evsel); |
108 | ||
109 | perf_evlist__set_id_pos(evlist); | |
110 | } | |
111 | ||
361c99a6 ACM |
112 | static void perf_evlist__purge(struct perf_evlist *evlist) |
113 | { | |
114 | struct perf_evsel *pos, *n; | |
115 | ||
e5cadb93 | 116 | evlist__for_each_entry_safe(evlist, n, pos) { |
361c99a6 | 117 | list_del_init(&pos->node); |
d49e4695 | 118 | pos->evlist = NULL; |
361c99a6 ACM |
119 | perf_evsel__delete(pos); |
120 | } | |
121 | ||
122 | evlist->nr_entries = 0; | |
123 | } | |
124 | ||
ef1d1af2 | 125 | void perf_evlist__exit(struct perf_evlist *evlist) |
361c99a6 | 126 | { |
04662523 | 127 | zfree(&evlist->mmap); |
b2cb615d | 128 | zfree(&evlist->backward_mmap); |
1b85337d | 129 | fdarray__exit(&evlist->pollfd); |
ef1d1af2 ACM |
130 | } |
131 | ||
132 | void perf_evlist__delete(struct perf_evlist *evlist) | |
133 | { | |
0b04b3dc ACM |
134 | if (evlist == NULL) |
135 | return; | |
136 | ||
983874d1 | 137 | perf_evlist__munmap(evlist); |
f26e1c7c | 138 | perf_evlist__close(evlist); |
f30a79b0 | 139 | cpu_map__put(evlist->cpus); |
186fbb74 | 140 | thread_map__put(evlist->threads); |
03ad9747 ACM |
141 | evlist->cpus = NULL; |
142 | evlist->threads = NULL; | |
ef1d1af2 ACM |
143 | perf_evlist__purge(evlist); |
144 | perf_evlist__exit(evlist); | |
361c99a6 ACM |
145 | free(evlist); |
146 | } | |
147 | ||
adc0c3e8 AH |
148 | static void __perf_evlist__propagate_maps(struct perf_evlist *evlist, |
149 | struct perf_evsel *evsel) | |
150 | { | |
151 | /* | |
152 | * We already have cpus for evsel (via PMU sysfs) so | |
153 | * keep it, if there's no target cpu list defined. | |
154 | */ | |
155 | if (!evsel->own_cpus || evlist->has_user_cpus) { | |
156 | cpu_map__put(evsel->cpus); | |
157 | evsel->cpus = cpu_map__get(evlist->cpus); | |
158 | } else if (evsel->cpus != evsel->own_cpus) { | |
159 | cpu_map__put(evsel->cpus); | |
160 | evsel->cpus = cpu_map__get(evsel->own_cpus); | |
161 | } | |
162 | ||
163 | thread_map__put(evsel->threads); | |
164 | evsel->threads = thread_map__get(evlist->threads); | |
165 | } | |
166 | ||
167 | static void perf_evlist__propagate_maps(struct perf_evlist *evlist) | |
168 | { | |
169 | struct perf_evsel *evsel; | |
170 | ||
e5cadb93 | 171 | evlist__for_each_entry(evlist, evsel) |
adc0c3e8 AH |
172 | __perf_evlist__propagate_maps(evlist, evsel); |
173 | } | |
174 | ||
361c99a6 ACM |
175 | void perf_evlist__add(struct perf_evlist *evlist, struct perf_evsel *entry) |
176 | { | |
d49e4695 | 177 | entry->evlist = evlist; |
361c99a6 | 178 | list_add_tail(&entry->node, &evlist->entries); |
ef503831 | 179 | entry->idx = evlist->nr_entries; |
60b0896c | 180 | entry->tracking = !entry->idx; |
ef503831 | 181 | |
75562573 AH |
182 | if (!evlist->nr_entries++) |
183 | perf_evlist__set_id_pos(evlist); | |
44c42d71 AH |
184 | |
185 | __perf_evlist__propagate_maps(evlist, entry); | |
361c99a6 ACM |
186 | } |
187 | ||
4768230a AH |
188 | void perf_evlist__remove(struct perf_evlist *evlist, struct perf_evsel *evsel) |
189 | { | |
190 | evsel->evlist = NULL; | |
191 | list_del_init(&evsel->node); | |
192 | evlist->nr_entries -= 1; | |
193 | } | |
194 | ||
0529bc1f | 195 | void perf_evlist__splice_list_tail(struct perf_evlist *evlist, |
f114d6ef | 196 | struct list_head *list) |
50d08e47 | 197 | { |
f114d6ef | 198 | struct perf_evsel *evsel, *temp; |
75562573 | 199 | |
e5cadb93 | 200 | __evlist__for_each_entry_safe(list, temp, evsel) { |
f114d6ef AH |
201 | list_del_init(&evsel->node); |
202 | perf_evlist__add(evlist, evsel); | |
203 | } | |
50d08e47 ACM |
204 | } |
205 | ||
63dab225 ACM |
206 | void __perf_evlist__set_leader(struct list_head *list) |
207 | { | |
208 | struct perf_evsel *evsel, *leader; | |
209 | ||
210 | leader = list_entry(list->next, struct perf_evsel, node); | |
97f63e4a NK |
211 | evsel = list_entry(list->prev, struct perf_evsel, node); |
212 | ||
213 | leader->nr_members = evsel->idx - leader->idx + 1; | |
63dab225 | 214 | |
e5cadb93 | 215 | __evlist__for_each_entry(list, evsel) { |
74b2133d | 216 | evsel->leader = leader; |
63dab225 ACM |
217 | } |
218 | } | |
219 | ||
220 | void perf_evlist__set_leader(struct perf_evlist *evlist) | |
6a4bb04c | 221 | { |
97f63e4a NK |
222 | if (evlist->nr_entries) { |
223 | evlist->nr_groups = evlist->nr_entries > 1 ? 1 : 0; | |
63dab225 | 224 | __perf_evlist__set_leader(&evlist->entries); |
97f63e4a | 225 | } |
6a4bb04c JO |
226 | } |
227 | ||
45cf6c33 | 228 | void perf_event_attr__set_max_precise_ip(struct perf_event_attr *attr) |
7f8d1ade ACM |
229 | { |
230 | attr->precise_ip = 3; | |
231 | ||
232 | while (attr->precise_ip != 0) { | |
233 | int fd = sys_perf_event_open(attr, 0, -1, -1, 0); | |
234 | if (fd != -1) { | |
235 | close(fd); | |
236 | break; | |
237 | } | |
238 | --attr->precise_ip; | |
239 | } | |
240 | } | |
241 | ||
db918acb | 242 | int __perf_evlist__add_default(struct perf_evlist *evlist, bool precise) |
361c99a6 | 243 | { |
db918acb | 244 | struct perf_evsel *evsel = perf_evsel__new_cycles(precise); |
1aed2671 | 245 | |
361c99a6 | 246 | if (evsel == NULL) |
7c48dcfd | 247 | return -ENOMEM; |
361c99a6 ACM |
248 | |
249 | perf_evlist__add(evlist, evsel); | |
250 | return 0; | |
251 | } | |
5c581041 | 252 | |
5bae0250 ACM |
253 | int perf_evlist__add_dummy(struct perf_evlist *evlist) |
254 | { | |
255 | struct perf_event_attr attr = { | |
256 | .type = PERF_TYPE_SOFTWARE, | |
257 | .config = PERF_COUNT_SW_DUMMY, | |
258 | .size = sizeof(attr), /* to capture ABI version */ | |
259 | }; | |
555b4ec4 | 260 | struct perf_evsel *evsel = perf_evsel__new_idx(&attr, evlist->nr_entries); |
5bae0250 ACM |
261 | |
262 | if (evsel == NULL) | |
263 | return -ENOMEM; | |
264 | ||
265 | perf_evlist__add(evlist, evsel); | |
266 | return 0; | |
267 | } | |
268 | ||
e60fc847 ACM |
269 | static int perf_evlist__add_attrs(struct perf_evlist *evlist, |
270 | struct perf_event_attr *attrs, size_t nr_attrs) | |
50d08e47 ACM |
271 | { |
272 | struct perf_evsel *evsel, *n; | |
273 | LIST_HEAD(head); | |
274 | size_t i; | |
275 | ||
276 | for (i = 0; i < nr_attrs; i++) { | |
ef503831 | 277 | evsel = perf_evsel__new_idx(attrs + i, evlist->nr_entries + i); |
50d08e47 ACM |
278 | if (evsel == NULL) |
279 | goto out_delete_partial_list; | |
280 | list_add_tail(&evsel->node, &head); | |
281 | } | |
282 | ||
f114d6ef | 283 | perf_evlist__splice_list_tail(evlist, &head); |
50d08e47 ACM |
284 | |
285 | return 0; | |
286 | ||
287 | out_delete_partial_list: | |
e5cadb93 | 288 | __evlist__for_each_entry_safe(&head, n, evsel) |
50d08e47 ACM |
289 | perf_evsel__delete(evsel); |
290 | return -1; | |
291 | } | |
292 | ||
79695e1b ACM |
293 | int __perf_evlist__add_default_attrs(struct perf_evlist *evlist, |
294 | struct perf_event_attr *attrs, size_t nr_attrs) | |
295 | { | |
296 | size_t i; | |
297 | ||
298 | for (i = 0; i < nr_attrs; i++) | |
299 | event_attr_init(attrs + i); | |
300 | ||
301 | return perf_evlist__add_attrs(evlist, attrs, nr_attrs); | |
302 | } | |
303 | ||
da378962 ACM |
304 | struct perf_evsel * |
305 | perf_evlist__find_tracepoint_by_id(struct perf_evlist *evlist, int id) | |
ee29be62 ACM |
306 | { |
307 | struct perf_evsel *evsel; | |
308 | ||
e5cadb93 | 309 | evlist__for_each_entry(evlist, evsel) { |
ee29be62 ACM |
310 | if (evsel->attr.type == PERF_TYPE_TRACEPOINT && |
311 | (int)evsel->attr.config == id) | |
312 | return evsel; | |
313 | } | |
314 | ||
315 | return NULL; | |
316 | } | |
317 | ||
a2f2804a DA |
318 | struct perf_evsel * |
319 | perf_evlist__find_tracepoint_by_name(struct perf_evlist *evlist, | |
320 | const char *name) | |
321 | { | |
322 | struct perf_evsel *evsel; | |
323 | ||
e5cadb93 | 324 | evlist__for_each_entry(evlist, evsel) { |
a2f2804a DA |
325 | if ((evsel->attr.type == PERF_TYPE_TRACEPOINT) && |
326 | (strcmp(evsel->name, name) == 0)) | |
327 | return evsel; | |
328 | } | |
329 | ||
330 | return NULL; | |
331 | } | |
332 | ||
39876e7d ACM |
333 | int perf_evlist__add_newtp(struct perf_evlist *evlist, |
334 | const char *sys, const char *name, void *handler) | |
335 | { | |
ef503831 | 336 | struct perf_evsel *evsel = perf_evsel__newtp(sys, name); |
39876e7d | 337 | |
8dd2a131 | 338 | if (IS_ERR(evsel)) |
39876e7d ACM |
339 | return -1; |
340 | ||
744a9719 | 341 | evsel->handler = handler; |
39876e7d ACM |
342 | perf_evlist__add(evlist, evsel); |
343 | return 0; | |
344 | } | |
345 | ||
bf8e8f4b AH |
346 | static int perf_evlist__nr_threads(struct perf_evlist *evlist, |
347 | struct perf_evsel *evsel) | |
348 | { | |
349 | if (evsel->system_wide) | |
350 | return 1; | |
351 | else | |
352 | return thread_map__nr(evlist->threads); | |
353 | } | |
354 | ||
4152ab37 ACM |
355 | void perf_evlist__disable(struct perf_evlist *evlist) |
356 | { | |
4152ab37 | 357 | struct perf_evsel *pos; |
3e27c920 | 358 | |
e5cadb93 | 359 | evlist__for_each_entry(evlist, pos) { |
3e27c920 JO |
360 | if (!perf_evsel__is_group_leader(pos) || !pos->fd) |
361 | continue; | |
362 | perf_evsel__disable(pos); | |
4152ab37 | 363 | } |
2b56bcfb ACM |
364 | |
365 | evlist->enabled = false; | |
4152ab37 ACM |
366 | } |
367 | ||
764e16a3 DA |
368 | void perf_evlist__enable(struct perf_evlist *evlist) |
369 | { | |
764e16a3 | 370 | struct perf_evsel *pos; |
3e27c920 | 371 | |
e5cadb93 | 372 | evlist__for_each_entry(evlist, pos) { |
3e27c920 JO |
373 | if (!perf_evsel__is_group_leader(pos) || !pos->fd) |
374 | continue; | |
375 | perf_evsel__enable(pos); | |
764e16a3 | 376 | } |
2b56bcfb ACM |
377 | |
378 | evlist->enabled = true; | |
379 | } | |
380 | ||
381 | void perf_evlist__toggle_enable(struct perf_evlist *evlist) | |
382 | { | |
383 | (evlist->enabled ? perf_evlist__disable : perf_evlist__enable)(evlist); | |
764e16a3 DA |
384 | } |
385 | ||
1c65056c AH |
386 | static int perf_evlist__enable_event_cpu(struct perf_evlist *evlist, |
387 | struct perf_evsel *evsel, int cpu) | |
388 | { | |
18ef15c6 | 389 | int thread; |
1c65056c AH |
390 | int nr_threads = perf_evlist__nr_threads(evlist, evsel); |
391 | ||
392 | if (!evsel->fd) | |
393 | return -EINVAL; | |
394 | ||
395 | for (thread = 0; thread < nr_threads; thread++) { | |
18ef15c6 | 396 | int err = ioctl(FD(evsel, cpu, thread), PERF_EVENT_IOC_ENABLE, 0); |
1c65056c AH |
397 | if (err) |
398 | return err; | |
399 | } | |
400 | return 0; | |
401 | } | |
402 | ||
403 | static int perf_evlist__enable_event_thread(struct perf_evlist *evlist, | |
404 | struct perf_evsel *evsel, | |
405 | int thread) | |
406 | { | |
18ef15c6 | 407 | int cpu; |
1c65056c AH |
408 | int nr_cpus = cpu_map__nr(evlist->cpus); |
409 | ||
410 | if (!evsel->fd) | |
411 | return -EINVAL; | |
412 | ||
413 | for (cpu = 0; cpu < nr_cpus; cpu++) { | |
18ef15c6 | 414 | int err = ioctl(FD(evsel, cpu, thread), PERF_EVENT_IOC_ENABLE, 0); |
1c65056c AH |
415 | if (err) |
416 | return err; | |
417 | } | |
418 | return 0; | |
419 | } | |
420 | ||
421 | int perf_evlist__enable_event_idx(struct perf_evlist *evlist, | |
422 | struct perf_evsel *evsel, int idx) | |
423 | { | |
424 | bool per_cpu_mmaps = !cpu_map__empty(evlist->cpus); | |
425 | ||
426 | if (per_cpu_mmaps) | |
427 | return perf_evlist__enable_event_cpu(evlist, evsel, idx); | |
428 | else | |
429 | return perf_evlist__enable_event_thread(evlist, evsel, idx); | |
430 | } | |
431 | ||
ad6765dd | 432 | int perf_evlist__alloc_pollfd(struct perf_evlist *evlist) |
5c581041 | 433 | { |
b3a319d5 NK |
434 | int nr_cpus = cpu_map__nr(evlist->cpus); |
435 | int nr_threads = thread_map__nr(evlist->threads); | |
bf8e8f4b AH |
436 | int nfds = 0; |
437 | struct perf_evsel *evsel; | |
438 | ||
e5cadb93 | 439 | evlist__for_each_entry(evlist, evsel) { |
bf8e8f4b AH |
440 | if (evsel->system_wide) |
441 | nfds += nr_cpus; | |
442 | else | |
443 | nfds += nr_cpus * nr_threads; | |
444 | } | |
445 | ||
1b85337d ACM |
446 | if (fdarray__available_entries(&evlist->pollfd) < nfds && |
447 | fdarray__grow(&evlist->pollfd, nfds) < 0) | |
ad6765dd ACM |
448 | return -ENOMEM; |
449 | ||
450 | return 0; | |
5c581041 | 451 | } |
70082dd9 | 452 | |
4876075b WN |
453 | static int __perf_evlist__add_pollfd(struct perf_evlist *evlist, int fd, |
454 | struct perf_mmap *map, short revent) | |
e4b356b5 | 455 | { |
f3058a1c | 456 | int pos = fdarray__add(&evlist->pollfd, fd, revent | POLLERR | POLLHUP); |
e4b356b5 ACM |
457 | /* |
458 | * Save the idx so that when we filter out fds POLLHUP'ed we can | |
459 | * close the associated evlist->mmap[] entry. | |
460 | */ | |
461 | if (pos >= 0) { | |
4876075b | 462 | evlist->pollfd.priv[pos].ptr = map; |
e4b356b5 ACM |
463 | |
464 | fcntl(fd, F_SETFL, O_NONBLOCK); | |
465 | } | |
466 | ||
467 | return pos; | |
468 | } | |
469 | ||
ad6765dd | 470 | int perf_evlist__add_pollfd(struct perf_evlist *evlist, int fd) |
70082dd9 | 471 | { |
4876075b | 472 | return __perf_evlist__add_pollfd(evlist, fd, NULL, POLLIN); |
e4b356b5 ACM |
473 | } |
474 | ||
258e4bfc WN |
475 | static void perf_evlist__munmap_filtered(struct fdarray *fda, int fd, |
476 | void *arg __maybe_unused) | |
e4b356b5 | 477 | { |
4876075b | 478 | struct perf_mmap *map = fda->priv[fd].ptr; |
1b85337d | 479 | |
4876075b WN |
480 | if (map) |
481 | perf_mmap__put(map); | |
70082dd9 | 482 | } |
70db7533 | 483 | |
1ddec7f0 ACM |
484 | int perf_evlist__filter_pollfd(struct perf_evlist *evlist, short revents_and_mask) |
485 | { | |
e4b356b5 | 486 | return fdarray__filter(&evlist->pollfd, revents_and_mask, |
258e4bfc | 487 | perf_evlist__munmap_filtered, NULL); |
1ddec7f0 ACM |
488 | } |
489 | ||
f66a889d ACM |
490 | int perf_evlist__poll(struct perf_evlist *evlist, int timeout) |
491 | { | |
1b85337d | 492 | return fdarray__poll(&evlist->pollfd, timeout); |
f66a889d ACM |
493 | } |
494 | ||
a91e5431 ACM |
495 | static void perf_evlist__id_hash(struct perf_evlist *evlist, |
496 | struct perf_evsel *evsel, | |
497 | int cpu, int thread, u64 id) | |
3d3b5e95 ACM |
498 | { |
499 | int hash; | |
500 | struct perf_sample_id *sid = SID(evsel, cpu, thread); | |
501 | ||
502 | sid->id = id; | |
503 | sid->evsel = evsel; | |
504 | hash = hash_64(sid->id, PERF_EVLIST__HLIST_BITS); | |
505 | hlist_add_head(&sid->node, &evlist->heads[hash]); | |
506 | } | |
507 | ||
a91e5431 ACM |
508 | void perf_evlist__id_add(struct perf_evlist *evlist, struct perf_evsel *evsel, |
509 | int cpu, int thread, u64 id) | |
510 | { | |
511 | perf_evlist__id_hash(evlist, evsel, cpu, thread, id); | |
512 | evsel->id[evsel->ids++] = id; | |
513 | } | |
514 | ||
1c59612d JO |
515 | int perf_evlist__id_add_fd(struct perf_evlist *evlist, |
516 | struct perf_evsel *evsel, | |
517 | int cpu, int thread, int fd) | |
f8a95309 | 518 | { |
f8a95309 | 519 | u64 read_data[4] = { 0, }; |
3d3b5e95 | 520 | int id_idx = 1; /* The first entry is the counter value */ |
e2b5abe0 JO |
521 | u64 id; |
522 | int ret; | |
523 | ||
524 | ret = ioctl(fd, PERF_EVENT_IOC_ID, &id); | |
525 | if (!ret) | |
526 | goto add; | |
527 | ||
528 | if (errno != ENOTTY) | |
529 | return -1; | |
530 | ||
531 | /* Legacy way to get event id.. All hail to old kernels! */ | |
f8a95309 | 532 | |
c4861afe JO |
533 | /* |
534 | * This way does not work with group format read, so bail | |
535 | * out in that case. | |
536 | */ | |
537 | if (perf_evlist__read_format(evlist) & PERF_FORMAT_GROUP) | |
538 | return -1; | |
539 | ||
f8a95309 ACM |
540 | if (!(evsel->attr.read_format & PERF_FORMAT_ID) || |
541 | read(fd, &read_data, sizeof(read_data)) == -1) | |
542 | return -1; | |
543 | ||
544 | if (evsel->attr.read_format & PERF_FORMAT_TOTAL_TIME_ENABLED) | |
545 | ++id_idx; | |
546 | if (evsel->attr.read_format & PERF_FORMAT_TOTAL_TIME_RUNNING) | |
547 | ++id_idx; | |
548 | ||
e2b5abe0 JO |
549 | id = read_data[id_idx]; |
550 | ||
551 | add: | |
552 | perf_evlist__id_add(evlist, evsel, cpu, thread, id); | |
f8a95309 ACM |
553 | return 0; |
554 | } | |
555 | ||
3c659eed AH |
556 | static void perf_evlist__set_sid_idx(struct perf_evlist *evlist, |
557 | struct perf_evsel *evsel, int idx, int cpu, | |
558 | int thread) | |
559 | { | |
560 | struct perf_sample_id *sid = SID(evsel, cpu, thread); | |
561 | sid->idx = idx; | |
562 | if (evlist->cpus && cpu >= 0) | |
563 | sid->cpu = evlist->cpus->map[cpu]; | |
564 | else | |
565 | sid->cpu = -1; | |
566 | if (!evsel->system_wide && evlist->threads && thread >= 0) | |
e13798c7 | 567 | sid->tid = thread_map__pid(evlist->threads, thread); |
3c659eed AH |
568 | else |
569 | sid->tid = -1; | |
570 | } | |
571 | ||
932a3594 | 572 | struct perf_sample_id *perf_evlist__id2sid(struct perf_evlist *evlist, u64 id) |
70db7533 ACM |
573 | { |
574 | struct hlist_head *head; | |
70db7533 ACM |
575 | struct perf_sample_id *sid; |
576 | int hash; | |
577 | ||
70db7533 ACM |
578 | hash = hash_64(id, PERF_EVLIST__HLIST_BITS); |
579 | head = &evlist->heads[hash]; | |
580 | ||
b67bfe0d | 581 | hlist_for_each_entry(sid, head, node) |
70db7533 | 582 | if (sid->id == id) |
932a3594 JO |
583 | return sid; |
584 | ||
585 | return NULL; | |
586 | } | |
587 | ||
588 | struct perf_evsel *perf_evlist__id2evsel(struct perf_evlist *evlist, u64 id) | |
589 | { | |
590 | struct perf_sample_id *sid; | |
591 | ||
05169df5 | 592 | if (evlist->nr_entries == 1 || !id) |
932a3594 JO |
593 | return perf_evlist__first(evlist); |
594 | ||
595 | sid = perf_evlist__id2sid(evlist, id); | |
596 | if (sid) | |
597 | return sid->evsel; | |
30e68bcc NK |
598 | |
599 | if (!perf_evlist__sample_id_all(evlist)) | |
0c21f736 | 600 | return perf_evlist__first(evlist); |
30e68bcc | 601 | |
70db7533 ACM |
602 | return NULL; |
603 | } | |
04391deb | 604 | |
dddcf6ab AH |
605 | struct perf_evsel *perf_evlist__id2evsel_strict(struct perf_evlist *evlist, |
606 | u64 id) | |
607 | { | |
608 | struct perf_sample_id *sid; | |
609 | ||
610 | if (!id) | |
611 | return NULL; | |
612 | ||
613 | sid = perf_evlist__id2sid(evlist, id); | |
614 | if (sid) | |
615 | return sid->evsel; | |
616 | ||
617 | return NULL; | |
618 | } | |
619 | ||
75562573 AH |
620 | static int perf_evlist__event2id(struct perf_evlist *evlist, |
621 | union perf_event *event, u64 *id) | |
622 | { | |
623 | const u64 *array = event->sample.array; | |
624 | ssize_t n; | |
625 | ||
626 | n = (event->header.size - sizeof(event->header)) >> 3; | |
627 | ||
628 | if (event->header.type == PERF_RECORD_SAMPLE) { | |
629 | if (evlist->id_pos >= n) | |
630 | return -1; | |
631 | *id = array[evlist->id_pos]; | |
632 | } else { | |
633 | if (evlist->is_pos > n) | |
634 | return -1; | |
635 | n -= evlist->is_pos; | |
636 | *id = array[n]; | |
637 | } | |
638 | return 0; | |
639 | } | |
640 | ||
7cb5c5ac JO |
641 | struct perf_evsel *perf_evlist__event2evsel(struct perf_evlist *evlist, |
642 | union perf_event *event) | |
75562573 | 643 | { |
98be6966 | 644 | struct perf_evsel *first = perf_evlist__first(evlist); |
75562573 AH |
645 | struct hlist_head *head; |
646 | struct perf_sample_id *sid; | |
647 | int hash; | |
648 | u64 id; | |
649 | ||
650 | if (evlist->nr_entries == 1) | |
98be6966 AH |
651 | return first; |
652 | ||
653 | if (!first->attr.sample_id_all && | |
654 | event->header.type != PERF_RECORD_SAMPLE) | |
655 | return first; | |
75562573 AH |
656 | |
657 | if (perf_evlist__event2id(evlist, event, &id)) | |
658 | return NULL; | |
659 | ||
660 | /* Synthesized events have an id of zero */ | |
661 | if (!id) | |
98be6966 | 662 | return first; |
75562573 AH |
663 | |
664 | hash = hash_64(id, PERF_EVLIST__HLIST_BITS); | |
665 | head = &evlist->heads[hash]; | |
666 | ||
667 | hlist_for_each_entry(sid, head, node) { | |
668 | if (sid->id == id) | |
669 | return sid->evsel; | |
670 | } | |
671 | return NULL; | |
672 | } | |
673 | ||
65aea233 WN |
674 | static int perf_evlist__set_paused(struct perf_evlist *evlist, bool value) |
675 | { | |
676 | int i; | |
677 | ||
078c3386 WN |
678 | if (!evlist->backward_mmap) |
679 | return 0; | |
680 | ||
65aea233 | 681 | for (i = 0; i < evlist->nr_mmaps; i++) { |
078c3386 | 682 | int fd = evlist->backward_mmap[i].fd; |
65aea233 WN |
683 | int err; |
684 | ||
685 | if (fd < 0) | |
686 | continue; | |
687 | err = ioctl(fd, PERF_EVENT_IOC_PAUSE_OUTPUT, value ? 1 : 0); | |
688 | if (err) | |
689 | return err; | |
690 | } | |
691 | return 0; | |
692 | } | |
693 | ||
f6cdff83 | 694 | static int perf_evlist__pause(struct perf_evlist *evlist) |
65aea233 WN |
695 | { |
696 | return perf_evlist__set_paused(evlist, true); | |
697 | } | |
698 | ||
f6cdff83 | 699 | static int perf_evlist__resume(struct perf_evlist *evlist) |
65aea233 WN |
700 | { |
701 | return perf_evlist__set_paused(evlist, false); | |
702 | } | |
703 | ||
8db6d6b1 WN |
704 | union perf_event *perf_evlist__mmap_read_forward(struct perf_evlist *evlist, int idx) |
705 | { | |
706 | struct perf_mmap *md = &evlist->mmap[idx]; | |
707 | ||
708 | /* | |
709 | * Check messup is required for forward overwritable ring buffer: | |
710 | * memory pointed by md->prev can be overwritten in this case. | |
711 | * No need for read-write ring buffer: kernel stop outputting when | |
712 | * it hit md->prev (perf_mmap__consume()). | |
713 | */ | |
714 | return perf_mmap__read_forward(md, evlist->overwrite); | |
715 | } | |
716 | ||
717 | union perf_event *perf_evlist__mmap_read_backward(struct perf_evlist *evlist, int idx) | |
718 | { | |
719 | struct perf_mmap *md = &evlist->mmap[idx]; | |
720 | ||
721 | /* | |
722 | * No need to check messup for backward ring buffer: | |
723 | * We can always read arbitrary long data from a backward | |
724 | * ring buffer unless we forget to pause it before reading. | |
725 | */ | |
726 | return perf_mmap__read_backward(md); | |
727 | } | |
728 | ||
5a5ddeb6 WN |
729 | union perf_event *perf_evlist__mmap_read(struct perf_evlist *evlist, int idx) |
730 | { | |
a0c6f451 | 731 | return perf_evlist__mmap_read_forward(evlist, idx); |
5a5ddeb6 WN |
732 | } |
733 | ||
8db6d6b1 WN |
734 | void perf_evlist__mmap_read_catchup(struct perf_evlist *evlist, int idx) |
735 | { | |
736 | perf_mmap__read_catchup(&evlist->mmap[idx]); | |
737 | } | |
738 | ||
8db6d6b1 WN |
739 | void perf_evlist__mmap_consume(struct perf_evlist *evlist, int idx) |
740 | { | |
741 | perf_mmap__consume(&evlist->mmap[idx], evlist->overwrite); | |
8e50d384 ZZ |
742 | } |
743 | ||
a1f72618 | 744 | static void perf_evlist__munmap_nofree(struct perf_evlist *evlist) |
f8a95309 | 745 | { |
aece948f | 746 | int i; |
f8a95309 | 747 | |
b2cb615d WN |
748 | if (evlist->mmap) |
749 | for (i = 0; i < evlist->nr_mmaps; i++) | |
750 | perf_mmap__munmap(&evlist->mmap[i]); | |
983874d1 | 751 | |
b2cb615d WN |
752 | if (evlist->backward_mmap) |
753 | for (i = 0; i < evlist->nr_mmaps; i++) | |
754 | perf_mmap__munmap(&evlist->backward_mmap[i]); | |
a1f72618 | 755 | } |
aece948f | 756 | |
a1f72618 WN |
757 | void perf_evlist__munmap(struct perf_evlist *evlist) |
758 | { | |
759 | perf_evlist__munmap_nofree(evlist); | |
04662523 | 760 | zfree(&evlist->mmap); |
b2cb615d | 761 | zfree(&evlist->backward_mmap); |
f8a95309 ACM |
762 | } |
763 | ||
8db6d6b1 | 764 | static struct perf_mmap *perf_evlist__alloc_mmap(struct perf_evlist *evlist) |
f8a95309 | 765 | { |
d4c6fb36 | 766 | int i; |
8db6d6b1 | 767 | struct perf_mmap *map; |
d4c6fb36 | 768 | |
a14bb7a6 | 769 | evlist->nr_mmaps = cpu_map__nr(evlist->cpus); |
ec1e7e43 | 770 | if (cpu_map__empty(evlist->cpus)) |
b3a319d5 | 771 | evlist->nr_mmaps = thread_map__nr(evlist->threads); |
8db6d6b1 WN |
772 | map = zalloc(evlist->nr_mmaps * sizeof(struct perf_mmap)); |
773 | if (!map) | |
774 | return NULL; | |
946ae1d4 | 775 | |
4738ca30 | 776 | for (i = 0; i < evlist->nr_mmaps; i++) { |
8db6d6b1 | 777 | map[i].fd = -1; |
4738ca30 ACM |
778 | /* |
779 | * When the perf_mmap() call is made we grab one refcount, plus | |
780 | * one extra to let perf_evlist__mmap_consume() get the last | |
781 | * events after all real references (perf_mmap__get()) are | |
782 | * dropped. | |
783 | * | |
784 | * Each PERF_EVENT_IOC_SET_OUTPUT points to this mmap and | |
785 | * thus does perf_mmap__get() on it. | |
786 | */ | |
787 | refcount_set(&map[i].refcnt, 0); | |
788 | } | |
8db6d6b1 | 789 | return map; |
f8a95309 ACM |
790 | } |
791 | ||
f3058a1c WN |
792 | static bool |
793 | perf_evlist__should_poll(struct perf_evlist *evlist __maybe_unused, | |
794 | struct perf_evsel *evsel) | |
795 | { | |
32a951b4 | 796 | if (evsel->attr.write_backward) |
f3058a1c WN |
797 | return false; |
798 | return true; | |
799 | } | |
800 | ||
04e21314 | 801 | static int perf_evlist__mmap_per_evsel(struct perf_evlist *evlist, int idx, |
9f21b815 | 802 | struct mmap_params *mp, int cpu_idx, |
078c3386 | 803 | int thread, int *_output, int *_output_backward) |
aece948f ACM |
804 | { |
805 | struct perf_evsel *evsel; | |
f3058a1c | 806 | int revent; |
9f21b815 | 807 | int evlist_cpu = cpu_map__cpu(evlist->cpus, cpu_idx); |
04e21314 | 808 | |
e5cadb93 | 809 | evlist__for_each_entry(evlist, evsel) { |
078c3386 WN |
810 | struct perf_mmap *maps = evlist->mmap; |
811 | int *output = _output; | |
bf8e8f4b | 812 | int fd; |
9f21b815 | 813 | int cpu; |
bf8e8f4b | 814 | |
078c3386 WN |
815 | if (evsel->attr.write_backward) { |
816 | output = _output_backward; | |
817 | maps = evlist->backward_mmap; | |
818 | ||
819 | if (!maps) { | |
820 | maps = perf_evlist__alloc_mmap(evlist); | |
821 | if (!maps) | |
822 | return -1; | |
823 | evlist->backward_mmap = maps; | |
54cc54de WN |
824 | if (evlist->bkw_mmap_state == BKW_MMAP_NOTREADY) |
825 | perf_evlist__toggle_bkw_mmap(evlist, BKW_MMAP_RUNNING); | |
078c3386 WN |
826 | } |
827 | } | |
f3058a1c | 828 | |
bf8e8f4b AH |
829 | if (evsel->system_wide && thread) |
830 | continue; | |
831 | ||
9f21b815 MR |
832 | cpu = cpu_map__idx(evsel->cpus, evlist_cpu); |
833 | if (cpu == -1) | |
834 | continue; | |
835 | ||
bf8e8f4b | 836 | fd = FD(evsel, cpu, thread); |
04e21314 AH |
837 | |
838 | if (*output == -1) { | |
839 | *output = fd; | |
078c3386 WN |
840 | |
841 | if (perf_mmap__mmap(&maps[idx], mp, *output) < 0) | |
04e21314 AH |
842 | return -1; |
843 | } else { | |
844 | if (ioctl(fd, PERF_EVENT_IOC_SET_OUTPUT, *output) != 0) | |
845 | return -1; | |
82396986 | 846 | |
078c3386 | 847 | perf_mmap__get(&maps[idx]); |
04e21314 AH |
848 | } |
849 | ||
f3058a1c WN |
850 | revent = perf_evlist__should_poll(evlist, evsel) ? POLLIN : 0; |
851 | ||
f90d194a AH |
852 | /* |
853 | * The system_wide flag causes a selected event to be opened | |
854 | * always without a pid. Consequently it will never get a | |
855 | * POLLHUP, but it is used for tracking in combination with | |
856 | * other events, so it should not need to be polled anyway. | |
857 | * Therefore don't add it for polling. | |
858 | */ | |
859 | if (!evsel->system_wide && | |
078c3386 WN |
860 | __perf_evlist__add_pollfd(evlist, fd, &maps[idx], revent) < 0) { |
861 | perf_mmap__put(&maps[idx]); | |
ad6765dd | 862 | return -1; |
82396986 | 863 | } |
033fa713 | 864 | |
3c659eed AH |
865 | if (evsel->attr.read_format & PERF_FORMAT_ID) { |
866 | if (perf_evlist__id_add_fd(evlist, evsel, cpu, thread, | |
867 | fd) < 0) | |
868 | return -1; | |
869 | perf_evlist__set_sid_idx(evlist, evsel, idx, cpu, | |
870 | thread); | |
871 | } | |
04e21314 AH |
872 | } |
873 | ||
874 | return 0; | |
875 | } | |
876 | ||
a8a8f3eb AH |
877 | static int perf_evlist__mmap_per_cpu(struct perf_evlist *evlist, |
878 | struct mmap_params *mp) | |
04e21314 | 879 | { |
aece948f | 880 | int cpu, thread; |
b3a319d5 NK |
881 | int nr_cpus = cpu_map__nr(evlist->cpus); |
882 | int nr_threads = thread_map__nr(evlist->threads); | |
aece948f | 883 | |
e3e1a54f | 884 | pr_debug2("perf event ring buffer mmapped per cpu\n"); |
b3a319d5 | 885 | for (cpu = 0; cpu < nr_cpus; cpu++) { |
aece948f | 886 | int output = -1; |
078c3386 | 887 | int output_backward = -1; |
aece948f | 888 | |
718c602d AH |
889 | auxtrace_mmap_params__set_idx(&mp->auxtrace_mp, evlist, cpu, |
890 | true); | |
891 | ||
b3a319d5 | 892 | for (thread = 0; thread < nr_threads; thread++) { |
a8a8f3eb | 893 | if (perf_evlist__mmap_per_evsel(evlist, cpu, mp, cpu, |
078c3386 | 894 | thread, &output, &output_backward)) |
04e21314 | 895 | goto out_unmap; |
aece948f ACM |
896 | } |
897 | } | |
898 | ||
899 | return 0; | |
900 | ||
901 | out_unmap: | |
a1f72618 | 902 | perf_evlist__munmap_nofree(evlist); |
aece948f ACM |
903 | return -1; |
904 | } | |
905 | ||
a8a8f3eb AH |
906 | static int perf_evlist__mmap_per_thread(struct perf_evlist *evlist, |
907 | struct mmap_params *mp) | |
aece948f | 908 | { |
aece948f | 909 | int thread; |
b3a319d5 | 910 | int nr_threads = thread_map__nr(evlist->threads); |
aece948f | 911 | |
e3e1a54f | 912 | pr_debug2("perf event ring buffer mmapped per thread\n"); |
b3a319d5 | 913 | for (thread = 0; thread < nr_threads; thread++) { |
aece948f | 914 | int output = -1; |
078c3386 | 915 | int output_backward = -1; |
aece948f | 916 | |
718c602d AH |
917 | auxtrace_mmap_params__set_idx(&mp->auxtrace_mp, evlist, thread, |
918 | false); | |
919 | ||
a8a8f3eb | 920 | if (perf_evlist__mmap_per_evsel(evlist, thread, mp, 0, thread, |
078c3386 | 921 | &output, &output_backward)) |
04e21314 | 922 | goto out_unmap; |
aece948f ACM |
923 | } |
924 | ||
925 | return 0; | |
926 | ||
927 | out_unmap: | |
a1f72618 | 928 | perf_evlist__munmap_nofree(evlist); |
aece948f ACM |
929 | return -1; |
930 | } | |
931 | ||
f5e7150c | 932 | unsigned long perf_event_mlock_kb_in_pages(void) |
994a1f78 | 933 | { |
f5e7150c ACM |
934 | unsigned long pages; |
935 | int max; | |
8185e881 | 936 | |
f5e7150c ACM |
937 | if (sysctl__read_int("kernel/perf_event_mlock_kb", &max) < 0) { |
938 | /* | |
939 | * Pick a once upon a time good value, i.e. things look | |
940 | * strange since we can't read a sysctl value, but lets not | |
941 | * die yet... | |
942 | */ | |
943 | max = 512; | |
944 | } else { | |
945 | max -= (page_size / 1024); | |
946 | } | |
8185e881 | 947 | |
f5e7150c ACM |
948 | pages = (max * 1024) / page_size; |
949 | if (!is_power_of_2(pages)) | |
950 | pages = rounddown_pow_of_two(pages); | |
951 | ||
952 | return pages; | |
953 | } | |
954 | ||
0c582449 | 955 | size_t perf_evlist__mmap_size(unsigned long pages) |
f5e7150c ACM |
956 | { |
957 | if (pages == UINT_MAX) | |
958 | pages = perf_event_mlock_kb_in_pages(); | |
959 | else if (!is_power_of_2(pages)) | |
994a1f78 JO |
960 | return 0; |
961 | ||
962 | return (pages + 1) * page_size; | |
963 | } | |
964 | ||
33c2dcfd DA |
965 | static long parse_pages_arg(const char *str, unsigned long min, |
966 | unsigned long max) | |
994a1f78 | 967 | { |
2fbe4abe | 968 | unsigned long pages, val; |
27050f53 JO |
969 | static struct parse_tag tags[] = { |
970 | { .tag = 'B', .mult = 1 }, | |
971 | { .tag = 'K', .mult = 1 << 10 }, | |
972 | { .tag = 'M', .mult = 1 << 20 }, | |
973 | { .tag = 'G', .mult = 1 << 30 }, | |
974 | { .tag = 0 }, | |
975 | }; | |
994a1f78 | 976 | |
8973504b | 977 | if (str == NULL) |
33c2dcfd | 978 | return -EINVAL; |
8973504b | 979 | |
27050f53 | 980 | val = parse_tag_value(str, tags); |
2fbe4abe | 981 | if (val != (unsigned long) -1) { |
27050f53 JO |
982 | /* we got file size value */ |
983 | pages = PERF_ALIGN(val, page_size) / page_size; | |
27050f53 JO |
984 | } else { |
985 | /* we got pages count value */ | |
986 | char *eptr; | |
987 | pages = strtoul(str, &eptr, 10); | |
33c2dcfd DA |
988 | if (*eptr != '\0') |
989 | return -EINVAL; | |
994a1f78 JO |
990 | } |
991 | ||
2bcab6c1 | 992 | if (pages == 0 && min == 0) { |
33c2dcfd | 993 | /* leave number of pages at 0 */ |
1dbfa938 | 994 | } else if (!is_power_of_2(pages)) { |
9808143b JO |
995 | char buf[100]; |
996 | ||
33c2dcfd | 997 | /* round pages up to next power of 2 */ |
91529834 | 998 | pages = roundup_pow_of_two(pages); |
1dbfa938 AH |
999 | if (!pages) |
1000 | return -EINVAL; | |
9808143b JO |
1001 | |
1002 | unit_number__scnprintf(buf, sizeof(buf), pages * page_size); | |
1003 | pr_info("rounding mmap pages size to %s (%lu pages)\n", | |
1004 | buf, pages); | |
2fbe4abe AH |
1005 | } |
1006 | ||
33c2dcfd DA |
1007 | if (pages > max) |
1008 | return -EINVAL; | |
1009 | ||
1010 | return pages; | |
1011 | } | |
1012 | ||
e9db1310 | 1013 | int __perf_evlist__parse_mmap_pages(unsigned int *mmap_pages, const char *str) |
33c2dcfd | 1014 | { |
33c2dcfd DA |
1015 | unsigned long max = UINT_MAX; |
1016 | long pages; | |
1017 | ||
f5ae9c42 | 1018 | if (max > SIZE_MAX / page_size) |
33c2dcfd DA |
1019 | max = SIZE_MAX / page_size; |
1020 | ||
1021 | pages = parse_pages_arg(str, 1, max); | |
1022 | if (pages < 0) { | |
1023 | pr_err("Invalid argument for --mmap_pages/-m\n"); | |
994a1f78 JO |
1024 | return -1; |
1025 | } | |
1026 | ||
1027 | *mmap_pages = pages; | |
1028 | return 0; | |
1029 | } | |
1030 | ||
e9db1310 AH |
1031 | int perf_evlist__parse_mmap_pages(const struct option *opt, const char *str, |
1032 | int unset __maybe_unused) | |
1033 | { | |
1034 | return __perf_evlist__parse_mmap_pages(opt->value, str); | |
1035 | } | |
1036 | ||
c83fa7f2 | 1037 | /** |
718c602d | 1038 | * perf_evlist__mmap_ex - Create mmaps to receive events. |
c83fa7f2 AH |
1039 | * @evlist: list of events |
1040 | * @pages: map length in pages | |
1041 | * @overwrite: overwrite older events? | |
718c602d AH |
1042 | * @auxtrace_pages - auxtrace map length in pages |
1043 | * @auxtrace_overwrite - overwrite older auxtrace data? | |
f8a95309 | 1044 | * |
c83fa7f2 AH |
1045 | * If @overwrite is %false the user needs to signal event consumption using |
1046 | * perf_mmap__write_tail(). Using perf_evlist__mmap_read() does this | |
1047 | * automatically. | |
7e2ed097 | 1048 | * |
718c602d AH |
1049 | * Similarly, if @auxtrace_overwrite is %false the user needs to signal data |
1050 | * consumption using auxtrace_mmap__write_tail(). | |
1051 | * | |
c83fa7f2 | 1052 | * Return: %0 on success, negative error code otherwise. |
f8a95309 | 1053 | */ |
718c602d AH |
1054 | int perf_evlist__mmap_ex(struct perf_evlist *evlist, unsigned int pages, |
1055 | bool overwrite, unsigned int auxtrace_pages, | |
1056 | bool auxtrace_overwrite) | |
f8a95309 | 1057 | { |
aece948f | 1058 | struct perf_evsel *evsel; |
7e2ed097 ACM |
1059 | const struct cpu_map *cpus = evlist->cpus; |
1060 | const struct thread_map *threads = evlist->threads; | |
a8a8f3eb AH |
1061 | struct mmap_params mp = { |
1062 | .prot = PROT_READ | (overwrite ? 0 : PROT_WRITE), | |
1063 | }; | |
50a682ce | 1064 | |
8db6d6b1 WN |
1065 | if (!evlist->mmap) |
1066 | evlist->mmap = perf_evlist__alloc_mmap(evlist); | |
1067 | if (!evlist->mmap) | |
f8a95309 ACM |
1068 | return -ENOMEM; |
1069 | ||
1b85337d | 1070 | if (evlist->pollfd.entries == NULL && perf_evlist__alloc_pollfd(evlist) < 0) |
f8a95309 ACM |
1071 | return -ENOMEM; |
1072 | ||
1073 | evlist->overwrite = overwrite; | |
994a1f78 | 1074 | evlist->mmap_len = perf_evlist__mmap_size(pages); |
2af68ef5 | 1075 | pr_debug("mmap size %zuB\n", evlist->mmap_len); |
a8a8f3eb | 1076 | mp.mask = evlist->mmap_len - page_size - 1; |
f8a95309 | 1077 | |
718c602d AH |
1078 | auxtrace_mmap_params__init(&mp.auxtrace_mp, evlist->mmap_len, |
1079 | auxtrace_pages, auxtrace_overwrite); | |
1080 | ||
e5cadb93 | 1081 | evlist__for_each_entry(evlist, evsel) { |
f8a95309 | 1082 | if ((evsel->attr.read_format & PERF_FORMAT_ID) && |
a91e5431 | 1083 | evsel->sample_id == NULL && |
a14bb7a6 | 1084 | perf_evsel__alloc_id(evsel, cpu_map__nr(cpus), threads->nr) < 0) |
f8a95309 | 1085 | return -ENOMEM; |
f8a95309 ACM |
1086 | } |
1087 | ||
ec1e7e43 | 1088 | if (cpu_map__empty(cpus)) |
a8a8f3eb | 1089 | return perf_evlist__mmap_per_thread(evlist, &mp); |
f8a95309 | 1090 | |
a8a8f3eb | 1091 | return perf_evlist__mmap_per_cpu(evlist, &mp); |
f8a95309 | 1092 | } |
7e2ed097 | 1093 | |
718c602d AH |
1094 | int perf_evlist__mmap(struct perf_evlist *evlist, unsigned int pages, |
1095 | bool overwrite) | |
1096 | { | |
1097 | return perf_evlist__mmap_ex(evlist, pages, overwrite, 0, false); | |
1098 | } | |
1099 | ||
602ad878 | 1100 | int perf_evlist__create_maps(struct perf_evlist *evlist, struct target *target) |
7e2ed097 | 1101 | { |
74bfd2b2 AH |
1102 | struct cpu_map *cpus; |
1103 | struct thread_map *threads; | |
7e2ed097 | 1104 | |
74bfd2b2 | 1105 | threads = thread_map__new_str(target->pid, target->tid, target->uid); |
7e2ed097 | 1106 | |
74bfd2b2 | 1107 | if (!threads) |
7e2ed097 ACM |
1108 | return -1; |
1109 | ||
9c105fbc | 1110 | if (target__uses_dummy_map(target)) |
74bfd2b2 | 1111 | cpus = cpu_map__dummy_new(); |
879d77d0 | 1112 | else |
74bfd2b2 | 1113 | cpus = cpu_map__new(target->cpu_list); |
7e2ed097 | 1114 | |
74bfd2b2 | 1115 | if (!cpus) |
7e2ed097 ACM |
1116 | goto out_delete_threads; |
1117 | ||
ec9a77a7 AH |
1118 | evlist->has_user_cpus = !!target->cpu_list; |
1119 | ||
74bfd2b2 | 1120 | perf_evlist__set_maps(evlist, cpus, threads); |
d5bc056e AH |
1121 | |
1122 | return 0; | |
7e2ed097 ACM |
1123 | |
1124 | out_delete_threads: | |
74bfd2b2 | 1125 | thread_map__put(threads); |
7e2ed097 ACM |
1126 | return -1; |
1127 | } | |
1128 | ||
d5bc056e AH |
1129 | void perf_evlist__set_maps(struct perf_evlist *evlist, struct cpu_map *cpus, |
1130 | struct thread_map *threads) | |
3de5cfb0 | 1131 | { |
934e0f20 AH |
1132 | /* |
1133 | * Allow for the possibility that one or another of the maps isn't being | |
1134 | * changed i.e. don't put it. Note we are assuming the maps that are | |
1135 | * being applied are brand new and evlist is taking ownership of the | |
1136 | * original reference count of 1. If that is not the case it is up to | |
1137 | * the caller to increase the reference count. | |
1138 | */ | |
1139 | if (cpus != evlist->cpus) { | |
3de5cfb0 | 1140 | cpu_map__put(evlist->cpus); |
a55e5663 | 1141 | evlist->cpus = cpu_map__get(cpus); |
934e0f20 | 1142 | } |
3de5cfb0 | 1143 | |
934e0f20 | 1144 | if (threads != evlist->threads) { |
3de5cfb0 | 1145 | thread_map__put(evlist->threads); |
a55e5663 | 1146 | evlist->threads = thread_map__get(threads); |
934e0f20 | 1147 | } |
3de5cfb0 | 1148 | |
ec9a77a7 | 1149 | perf_evlist__propagate_maps(evlist); |
3de5cfb0 JO |
1150 | } |
1151 | ||
22c8a376 ACM |
1152 | void __perf_evlist__set_sample_bit(struct perf_evlist *evlist, |
1153 | enum perf_event_sample_format bit) | |
1154 | { | |
1155 | struct perf_evsel *evsel; | |
1156 | ||
e5cadb93 | 1157 | evlist__for_each_entry(evlist, evsel) |
22c8a376 ACM |
1158 | __perf_evsel__set_sample_bit(evsel, bit); |
1159 | } | |
1160 | ||
1161 | void __perf_evlist__reset_sample_bit(struct perf_evlist *evlist, | |
1162 | enum perf_event_sample_format bit) | |
1163 | { | |
1164 | struct perf_evsel *evsel; | |
1165 | ||
e5cadb93 | 1166 | evlist__for_each_entry(evlist, evsel) |
22c8a376 ACM |
1167 | __perf_evsel__reset_sample_bit(evsel, bit); |
1168 | } | |
1169 | ||
23d4aad4 | 1170 | int perf_evlist__apply_filters(struct perf_evlist *evlist, struct perf_evsel **err_evsel) |
0a102479 | 1171 | { |
0a102479 | 1172 | struct perf_evsel *evsel; |
745cefc5 | 1173 | int err = 0; |
0a102479 | 1174 | |
e5cadb93 | 1175 | evlist__for_each_entry(evlist, evsel) { |
745cefc5 | 1176 | if (evsel->filter == NULL) |
0a102479 | 1177 | continue; |
745cefc5 | 1178 | |
d988d5ee KL |
1179 | /* |
1180 | * filters only work for tracepoint event, which doesn't have cpu limit. | |
1181 | * So evlist and evsel should always be same. | |
1182 | */ | |
475fb533 | 1183 | err = perf_evsel__apply_filter(evsel, evsel->filter); |
23d4aad4 ACM |
1184 | if (err) { |
1185 | *err_evsel = evsel; | |
745cefc5 | 1186 | break; |
23d4aad4 | 1187 | } |
0a102479 FW |
1188 | } |
1189 | ||
745cefc5 ACM |
1190 | return err; |
1191 | } | |
1192 | ||
1193 | int perf_evlist__set_filter(struct perf_evlist *evlist, const char *filter) | |
1194 | { | |
1195 | struct perf_evsel *evsel; | |
1196 | int err = 0; | |
745cefc5 | 1197 | |
e5cadb93 | 1198 | evlist__for_each_entry(evlist, evsel) { |
fdf14720 WN |
1199 | if (evsel->attr.type != PERF_TYPE_TRACEPOINT) |
1200 | continue; | |
1201 | ||
94ad89bc | 1202 | err = perf_evsel__set_filter(evsel, filter); |
745cefc5 ACM |
1203 | if (err) |
1204 | break; | |
1205 | } | |
1206 | ||
1207 | return err; | |
0a102479 | 1208 | } |
74429964 | 1209 | |
be199ada | 1210 | int perf_evlist__set_filter_pids(struct perf_evlist *evlist, size_t npids, pid_t *pids) |
cfd70a26 ACM |
1211 | { |
1212 | char *filter; | |
be199ada ACM |
1213 | int ret = -1; |
1214 | size_t i; | |
cfd70a26 | 1215 | |
be199ada ACM |
1216 | for (i = 0; i < npids; ++i) { |
1217 | if (i == 0) { | |
1218 | if (asprintf(&filter, "common_pid != %d", pids[i]) < 0) | |
1219 | return -1; | |
1220 | } else { | |
1221 | char *tmp; | |
1222 | ||
1223 | if (asprintf(&tmp, "%s && common_pid != %d", filter, pids[i]) < 0) | |
1224 | goto out_free; | |
1225 | ||
1226 | free(filter); | |
1227 | filter = tmp; | |
1228 | } | |
1229 | } | |
cfd70a26 ACM |
1230 | |
1231 | ret = perf_evlist__set_filter(evlist, filter); | |
be199ada | 1232 | out_free: |
cfd70a26 ACM |
1233 | free(filter); |
1234 | return ret; | |
1235 | } | |
1236 | ||
be199ada ACM |
1237 | int perf_evlist__set_filter_pid(struct perf_evlist *evlist, pid_t pid) |
1238 | { | |
1239 | return perf_evlist__set_filter_pids(evlist, 1, &pid); | |
1240 | } | |
1241 | ||
0c21f736 | 1242 | bool perf_evlist__valid_sample_type(struct perf_evlist *evlist) |
74429964 | 1243 | { |
75562573 | 1244 | struct perf_evsel *pos; |
c2a70653 | 1245 | |
75562573 AH |
1246 | if (evlist->nr_entries == 1) |
1247 | return true; | |
1248 | ||
1249 | if (evlist->id_pos < 0 || evlist->is_pos < 0) | |
1250 | return false; | |
1251 | ||
e5cadb93 | 1252 | evlist__for_each_entry(evlist, pos) { |
75562573 AH |
1253 | if (pos->id_pos != evlist->id_pos || |
1254 | pos->is_pos != evlist->is_pos) | |
c2a70653 | 1255 | return false; |
74429964 FW |
1256 | } |
1257 | ||
c2a70653 | 1258 | return true; |
74429964 FW |
1259 | } |
1260 | ||
75562573 | 1261 | u64 __perf_evlist__combined_sample_type(struct perf_evlist *evlist) |
c2a70653 | 1262 | { |
75562573 AH |
1263 | struct perf_evsel *evsel; |
1264 | ||
1265 | if (evlist->combined_sample_type) | |
1266 | return evlist->combined_sample_type; | |
1267 | ||
e5cadb93 | 1268 | evlist__for_each_entry(evlist, evsel) |
75562573 AH |
1269 | evlist->combined_sample_type |= evsel->attr.sample_type; |
1270 | ||
1271 | return evlist->combined_sample_type; | |
1272 | } | |
1273 | ||
1274 | u64 perf_evlist__combined_sample_type(struct perf_evlist *evlist) | |
1275 | { | |
1276 | evlist->combined_sample_type = 0; | |
1277 | return __perf_evlist__combined_sample_type(evlist); | |
c2a70653 ACM |
1278 | } |
1279 | ||
98df858e AK |
1280 | u64 perf_evlist__combined_branch_type(struct perf_evlist *evlist) |
1281 | { | |
1282 | struct perf_evsel *evsel; | |
1283 | u64 branch_type = 0; | |
1284 | ||
e5cadb93 | 1285 | evlist__for_each_entry(evlist, evsel) |
98df858e AK |
1286 | branch_type |= evsel->attr.branch_sample_type; |
1287 | return branch_type; | |
1288 | } | |
1289 | ||
9ede473c JO |
1290 | bool perf_evlist__valid_read_format(struct perf_evlist *evlist) |
1291 | { | |
1292 | struct perf_evsel *first = perf_evlist__first(evlist), *pos = first; | |
1293 | u64 read_format = first->attr.read_format; | |
1294 | u64 sample_type = first->attr.sample_type; | |
1295 | ||
e5cadb93 | 1296 | evlist__for_each_entry(evlist, pos) { |
9ede473c JO |
1297 | if (read_format != pos->attr.read_format) |
1298 | return false; | |
1299 | } | |
1300 | ||
1301 | /* PERF_SAMPLE_READ imples PERF_FORMAT_ID. */ | |
1302 | if ((sample_type & PERF_SAMPLE_READ) && | |
1303 | !(read_format & PERF_FORMAT_ID)) { | |
1304 | return false; | |
1305 | } | |
1306 | ||
1307 | return true; | |
1308 | } | |
1309 | ||
1310 | u64 perf_evlist__read_format(struct perf_evlist *evlist) | |
1311 | { | |
1312 | struct perf_evsel *first = perf_evlist__first(evlist); | |
1313 | return first->attr.read_format; | |
1314 | } | |
1315 | ||
0c21f736 | 1316 | u16 perf_evlist__id_hdr_size(struct perf_evlist *evlist) |
81e36bff | 1317 | { |
0c21f736 | 1318 | struct perf_evsel *first = perf_evlist__first(evlist); |
81e36bff ACM |
1319 | struct perf_sample *data; |
1320 | u64 sample_type; | |
1321 | u16 size = 0; | |
1322 | ||
81e36bff ACM |
1323 | if (!first->attr.sample_id_all) |
1324 | goto out; | |
1325 | ||
1326 | sample_type = first->attr.sample_type; | |
1327 | ||
1328 | if (sample_type & PERF_SAMPLE_TID) | |
1329 | size += sizeof(data->tid) * 2; | |
1330 | ||
1331 | if (sample_type & PERF_SAMPLE_TIME) | |
1332 | size += sizeof(data->time); | |
1333 | ||
1334 | if (sample_type & PERF_SAMPLE_ID) | |
1335 | size += sizeof(data->id); | |
1336 | ||
1337 | if (sample_type & PERF_SAMPLE_STREAM_ID) | |
1338 | size += sizeof(data->stream_id); | |
1339 | ||
1340 | if (sample_type & PERF_SAMPLE_CPU) | |
1341 | size += sizeof(data->cpu) * 2; | |
75562573 AH |
1342 | |
1343 | if (sample_type & PERF_SAMPLE_IDENTIFIER) | |
1344 | size += sizeof(data->id); | |
81e36bff ACM |
1345 | out: |
1346 | return size; | |
1347 | } | |
1348 | ||
0c21f736 | 1349 | bool perf_evlist__valid_sample_id_all(struct perf_evlist *evlist) |
74429964 | 1350 | { |
0c21f736 | 1351 | struct perf_evsel *first = perf_evlist__first(evlist), *pos = first; |
c2a70653 | 1352 | |
e5cadb93 | 1353 | evlist__for_each_entry_continue(evlist, pos) { |
c2a70653 ACM |
1354 | if (first->attr.sample_id_all != pos->attr.sample_id_all) |
1355 | return false; | |
74429964 FW |
1356 | } |
1357 | ||
c2a70653 ACM |
1358 | return true; |
1359 | } | |
1360 | ||
0c21f736 | 1361 | bool perf_evlist__sample_id_all(struct perf_evlist *evlist) |
c2a70653 | 1362 | { |
0c21f736 | 1363 | struct perf_evsel *first = perf_evlist__first(evlist); |
c2a70653 | 1364 | return first->attr.sample_id_all; |
74429964 | 1365 | } |
81cce8de ACM |
1366 | |
1367 | void perf_evlist__set_selected(struct perf_evlist *evlist, | |
1368 | struct perf_evsel *evsel) | |
1369 | { | |
1370 | evlist->selected = evsel; | |
1371 | } | |
727ab04e | 1372 | |
a74b4b66 NK |
1373 | void perf_evlist__close(struct perf_evlist *evlist) |
1374 | { | |
1375 | struct perf_evsel *evsel; | |
a74b4b66 | 1376 | |
475fb533 AK |
1377 | evlist__for_each_entry_reverse(evlist, evsel) |
1378 | perf_evsel__close(evsel); | |
a74b4b66 NK |
1379 | } |
1380 | ||
4112eb18 ACM |
1381 | static int perf_evlist__create_syswide_maps(struct perf_evlist *evlist) |
1382 | { | |
8c0498b6 AH |
1383 | struct cpu_map *cpus; |
1384 | struct thread_map *threads; | |
4112eb18 ACM |
1385 | int err = -ENOMEM; |
1386 | ||
1387 | /* | |
1388 | * Try reading /sys/devices/system/cpu/online to get | |
1389 | * an all cpus map. | |
1390 | * | |
1391 | * FIXME: -ENOMEM is the best we can do here, the cpu_map | |
1392 | * code needs an overhaul to properly forward the | |
1393 | * error, and we may not want to do that fallback to a | |
1394 | * default cpu identity map :-\ | |
1395 | */ | |
8c0498b6 AH |
1396 | cpus = cpu_map__new(NULL); |
1397 | if (!cpus) | |
4112eb18 ACM |
1398 | goto out; |
1399 | ||
8c0498b6 AH |
1400 | threads = thread_map__new_dummy(); |
1401 | if (!threads) | |
1402 | goto out_put; | |
4112eb18 | 1403 | |
8c0498b6 | 1404 | perf_evlist__set_maps(evlist, cpus, threads); |
4112eb18 ACM |
1405 | out: |
1406 | return err; | |
8c0498b6 AH |
1407 | out_put: |
1408 | cpu_map__put(cpus); | |
4112eb18 ACM |
1409 | goto out; |
1410 | } | |
1411 | ||
6a4bb04c | 1412 | int perf_evlist__open(struct perf_evlist *evlist) |
727ab04e | 1413 | { |
6a4bb04c | 1414 | struct perf_evsel *evsel; |
a74b4b66 | 1415 | int err; |
727ab04e | 1416 | |
4112eb18 ACM |
1417 | /* |
1418 | * Default: one fd per CPU, all threads, aka systemwide | |
1419 | * as sys_perf_event_open(cpu = -1, thread = -1) is EINVAL | |
1420 | */ | |
1421 | if (evlist->threads == NULL && evlist->cpus == NULL) { | |
1422 | err = perf_evlist__create_syswide_maps(evlist); | |
1423 | if (err < 0) | |
1424 | goto out_err; | |
1425 | } | |
1426 | ||
733cd2fe AH |
1427 | perf_evlist__update_id_pos(evlist); |
1428 | ||
e5cadb93 | 1429 | evlist__for_each_entry(evlist, evsel) { |
23df7f79 | 1430 | err = perf_evsel__open(evsel, evsel->cpus, evsel->threads); |
727ab04e ACM |
1431 | if (err < 0) |
1432 | goto out_err; | |
1433 | } | |
1434 | ||
1435 | return 0; | |
1436 | out_err: | |
a74b4b66 | 1437 | perf_evlist__close(evlist); |
41c21a68 | 1438 | errno = -err; |
727ab04e ACM |
1439 | return err; |
1440 | } | |
35b9d88e | 1441 | |
602ad878 | 1442 | int perf_evlist__prepare_workload(struct perf_evlist *evlist, struct target *target, |
55e162ea | 1443 | const char *argv[], bool pipe_output, |
735f7e0b | 1444 | void (*exec_error)(int signo, siginfo_t *info, void *ucontext)) |
35b9d88e ACM |
1445 | { |
1446 | int child_ready_pipe[2], go_pipe[2]; | |
1447 | char bf; | |
1448 | ||
1449 | if (pipe(child_ready_pipe) < 0) { | |
1450 | perror("failed to create 'ready' pipe"); | |
1451 | return -1; | |
1452 | } | |
1453 | ||
1454 | if (pipe(go_pipe) < 0) { | |
1455 | perror("failed to create 'go' pipe"); | |
1456 | goto out_close_ready_pipe; | |
1457 | } | |
1458 | ||
1459 | evlist->workload.pid = fork(); | |
1460 | if (evlist->workload.pid < 0) { | |
1461 | perror("failed to fork"); | |
1462 | goto out_close_pipes; | |
1463 | } | |
1464 | ||
1465 | if (!evlist->workload.pid) { | |
5f1c4225 ACM |
1466 | int ret; |
1467 | ||
119fa3c9 | 1468 | if (pipe_output) |
35b9d88e ACM |
1469 | dup2(2, 1); |
1470 | ||
0817df08 DA |
1471 | signal(SIGTERM, SIG_DFL); |
1472 | ||
35b9d88e ACM |
1473 | close(child_ready_pipe[0]); |
1474 | close(go_pipe[1]); | |
1475 | fcntl(go_pipe[0], F_SETFD, FD_CLOEXEC); | |
1476 | ||
35b9d88e ACM |
1477 | /* |
1478 | * Tell the parent we're ready to go | |
1479 | */ | |
1480 | close(child_ready_pipe[1]); | |
1481 | ||
1482 | /* | |
1483 | * Wait until the parent tells us to go. | |
1484 | */ | |
5f1c4225 ACM |
1485 | ret = read(go_pipe[0], &bf, 1); |
1486 | /* | |
1487 | * The parent will ask for the execvp() to be performed by | |
1488 | * writing exactly one byte, in workload.cork_fd, usually via | |
1489 | * perf_evlist__start_workload(). | |
1490 | * | |
20f86fc1 | 1491 | * For cancelling the workload without actually running it, |
5f1c4225 ACM |
1492 | * the parent will just close workload.cork_fd, without writing |
1493 | * anything, i.e. read will return zero and we just exit() | |
1494 | * here. | |
1495 | */ | |
1496 | if (ret != 1) { | |
1497 | if (ret == -1) | |
1498 | perror("unable to read pipe"); | |
1499 | exit(ret); | |
1500 | } | |
35b9d88e ACM |
1501 | |
1502 | execvp(argv[0], (char **)argv); | |
1503 | ||
735f7e0b | 1504 | if (exec_error) { |
f33cbe72 ACM |
1505 | union sigval val; |
1506 | ||
1507 | val.sival_int = errno; | |
1508 | if (sigqueue(getppid(), SIGUSR1, val)) | |
1509 | perror(argv[0]); | |
1510 | } else | |
1511 | perror(argv[0]); | |
35b9d88e ACM |
1512 | exit(-1); |
1513 | } | |
1514 | ||
735f7e0b ACM |
1515 | if (exec_error) { |
1516 | struct sigaction act = { | |
1517 | .sa_flags = SA_SIGINFO, | |
1518 | .sa_sigaction = exec_error, | |
1519 | }; | |
1520 | sigaction(SIGUSR1, &act, NULL); | |
1521 | } | |
1522 | ||
1aaf63b1 ACM |
1523 | if (target__none(target)) { |
1524 | if (evlist->threads == NULL) { | |
1525 | fprintf(stderr, "FATAL: evlist->threads need to be set at this point (%s:%d).\n", | |
1526 | __func__, __LINE__); | |
1527 | goto out_close_pipes; | |
1528 | } | |
e13798c7 | 1529 | thread_map__set_pid(evlist->threads, 0, evlist->workload.pid); |
1aaf63b1 | 1530 | } |
35b9d88e ACM |
1531 | |
1532 | close(child_ready_pipe[1]); | |
1533 | close(go_pipe[0]); | |
1534 | /* | |
1535 | * wait for child to settle | |
1536 | */ | |
1537 | if (read(child_ready_pipe[0], &bf, 1) == -1) { | |
1538 | perror("unable to read pipe"); | |
1539 | goto out_close_pipes; | |
1540 | } | |
1541 | ||
bcf3145f | 1542 | fcntl(go_pipe[1], F_SETFD, FD_CLOEXEC); |
35b9d88e ACM |
1543 | evlist->workload.cork_fd = go_pipe[1]; |
1544 | close(child_ready_pipe[0]); | |
1545 | return 0; | |
1546 | ||
1547 | out_close_pipes: | |
1548 | close(go_pipe[0]); | |
1549 | close(go_pipe[1]); | |
1550 | out_close_ready_pipe: | |
1551 | close(child_ready_pipe[0]); | |
1552 | close(child_ready_pipe[1]); | |
1553 | return -1; | |
1554 | } | |
1555 | ||
1556 | int perf_evlist__start_workload(struct perf_evlist *evlist) | |
1557 | { | |
1558 | if (evlist->workload.cork_fd > 0) { | |
b3824404 | 1559 | char bf = 0; |
bcf3145f | 1560 | int ret; |
35b9d88e ACM |
1561 | /* |
1562 | * Remove the cork, let it rip! | |
1563 | */ | |
bcf3145f NK |
1564 | ret = write(evlist->workload.cork_fd, &bf, 1); |
1565 | if (ret < 0) | |
e978be9e | 1566 | perror("unable to write to pipe"); |
bcf3145f NK |
1567 | |
1568 | close(evlist->workload.cork_fd); | |
1569 | return ret; | |
35b9d88e ACM |
1570 | } |
1571 | ||
1572 | return 0; | |
1573 | } | |
cb0b29e0 | 1574 | |
a3f698fe | 1575 | int perf_evlist__parse_sample(struct perf_evlist *evlist, union perf_event *event, |
0807d2d8 | 1576 | struct perf_sample *sample) |
cb0b29e0 | 1577 | { |
75562573 AH |
1578 | struct perf_evsel *evsel = perf_evlist__event2evsel(evlist, event); |
1579 | ||
1580 | if (!evsel) | |
1581 | return -EFAULT; | |
0807d2d8 | 1582 | return perf_evsel__parse_sample(evsel, event, sample); |
cb0b29e0 | 1583 | } |
78f067b3 ACM |
1584 | |
1585 | size_t perf_evlist__fprintf(struct perf_evlist *evlist, FILE *fp) | |
1586 | { | |
1587 | struct perf_evsel *evsel; | |
1588 | size_t printed = 0; | |
1589 | ||
e5cadb93 | 1590 | evlist__for_each_entry(evlist, evsel) { |
78f067b3 ACM |
1591 | printed += fprintf(fp, "%s%s", evsel->idx ? ", " : "", |
1592 | perf_evsel__name(evsel)); | |
1593 | } | |
1594 | ||
b2222139 | 1595 | return printed + fprintf(fp, "\n"); |
78f067b3 | 1596 | } |
6ef068cb | 1597 | |
d9aade7f | 1598 | int perf_evlist__strerror_open(struct perf_evlist *evlist, |
a8f23d8f ACM |
1599 | int err, char *buf, size_t size) |
1600 | { | |
1601 | int printed, value; | |
c8b5f2c9 | 1602 | char sbuf[STRERR_BUFSIZE], *emsg = str_error_r(err, sbuf, sizeof(sbuf)); |
a8f23d8f ACM |
1603 | |
1604 | switch (err) { | |
1605 | case EACCES: | |
1606 | case EPERM: | |
1607 | printed = scnprintf(buf, size, | |
1608 | "Error:\t%s.\n" | |
1609 | "Hint:\tCheck /proc/sys/kernel/perf_event_paranoid setting.", emsg); | |
1610 | ||
1a47245d | 1611 | value = perf_event_paranoid(); |
a8f23d8f ACM |
1612 | |
1613 | printed += scnprintf(buf + printed, size - printed, "\nHint:\t"); | |
1614 | ||
1615 | if (value >= 2) { | |
1616 | printed += scnprintf(buf + printed, size - printed, | |
1617 | "For your workloads it needs to be <= 1\nHint:\t"); | |
1618 | } | |
1619 | printed += scnprintf(buf + printed, size - printed, | |
5229e366 | 1620 | "For system wide tracing it needs to be set to -1.\n"); |
a8f23d8f ACM |
1621 | |
1622 | printed += scnprintf(buf + printed, size - printed, | |
5229e366 ACM |
1623 | "Hint:\tTry: 'sudo sh -c \"echo -1 > /proc/sys/kernel/perf_event_paranoid\"'\n" |
1624 | "Hint:\tThe current value is %d.", value); | |
a8f23d8f | 1625 | break; |
d9aade7f ACM |
1626 | case EINVAL: { |
1627 | struct perf_evsel *first = perf_evlist__first(evlist); | |
1628 | int max_freq; | |
1629 | ||
1630 | if (sysctl__read_int("kernel/perf_event_max_sample_rate", &max_freq) < 0) | |
1631 | goto out_default; | |
1632 | ||
1633 | if (first->attr.sample_freq < (u64)max_freq) | |
1634 | goto out_default; | |
1635 | ||
1636 | printed = scnprintf(buf, size, | |
1637 | "Error:\t%s.\n" | |
1638 | "Hint:\tCheck /proc/sys/kernel/perf_event_max_sample_rate.\n" | |
1639 | "Hint:\tThe current value is %d and %" PRIu64 " is being requested.", | |
1640 | emsg, max_freq, first->attr.sample_freq); | |
1641 | break; | |
1642 | } | |
a8f23d8f | 1643 | default: |
d9aade7f | 1644 | out_default: |
a8f23d8f ACM |
1645 | scnprintf(buf, size, "%s", emsg); |
1646 | break; | |
1647 | } | |
1648 | ||
1649 | return 0; | |
1650 | } | |
a025e4f0 | 1651 | |
956fa571 ACM |
1652 | int perf_evlist__strerror_mmap(struct perf_evlist *evlist, int err, char *buf, size_t size) |
1653 | { | |
c8b5f2c9 | 1654 | char sbuf[STRERR_BUFSIZE], *emsg = str_error_r(err, sbuf, sizeof(sbuf)); |
e965bea1 | 1655 | int pages_attempted = evlist->mmap_len / 1024, pages_max_per_user, printed = 0; |
956fa571 ACM |
1656 | |
1657 | switch (err) { | |
1658 | case EPERM: | |
e5d4a290 | 1659 | sysctl__read_int("kernel/perf_event_mlock_kb", &pages_max_per_user); |
e965bea1 ACM |
1660 | printed += scnprintf(buf + printed, size - printed, |
1661 | "Error:\t%s.\n" | |
956fa571 | 1662 | "Hint:\tCheck /proc/sys/kernel/perf_event_mlock_kb (%d kB) setting.\n" |
e965bea1 | 1663 | "Hint:\tTried using %zd kB.\n", |
e5d4a290 | 1664 | emsg, pages_max_per_user, pages_attempted); |
e965bea1 ACM |
1665 | |
1666 | if (pages_attempted >= pages_max_per_user) { | |
1667 | printed += scnprintf(buf + printed, size - printed, | |
1668 | "Hint:\tTry 'sudo sh -c \"echo %d > /proc/sys/kernel/perf_event_mlock_kb\"', or\n", | |
1669 | pages_max_per_user + pages_attempted); | |
1670 | } | |
1671 | ||
1672 | printed += scnprintf(buf + printed, size - printed, | |
1673 | "Hint:\tTry using a smaller -m/--mmap-pages value."); | |
956fa571 ACM |
1674 | break; |
1675 | default: | |
1676 | scnprintf(buf, size, "%s", emsg); | |
1677 | break; | |
1678 | } | |
1679 | ||
1680 | return 0; | |
1681 | } | |
1682 | ||
a025e4f0 AH |
1683 | void perf_evlist__to_front(struct perf_evlist *evlist, |
1684 | struct perf_evsel *move_evsel) | |
1685 | { | |
1686 | struct perf_evsel *evsel, *n; | |
1687 | LIST_HEAD(move); | |
1688 | ||
1689 | if (move_evsel == perf_evlist__first(evlist)) | |
1690 | return; | |
1691 | ||
e5cadb93 | 1692 | evlist__for_each_entry_safe(evlist, n, evsel) { |
a025e4f0 AH |
1693 | if (evsel->leader == move_evsel->leader) |
1694 | list_move_tail(&evsel->node, &move); | |
1695 | } | |
1696 | ||
1697 | list_splice(&move, &evlist->entries); | |
1698 | } | |
60b0896c AH |
1699 | |
1700 | void perf_evlist__set_tracking_event(struct perf_evlist *evlist, | |
1701 | struct perf_evsel *tracking_evsel) | |
1702 | { | |
1703 | struct perf_evsel *evsel; | |
1704 | ||
1705 | if (tracking_evsel->tracking) | |
1706 | return; | |
1707 | ||
e5cadb93 | 1708 | evlist__for_each_entry(evlist, evsel) { |
60b0896c AH |
1709 | if (evsel != tracking_evsel) |
1710 | evsel->tracking = false; | |
1711 | } | |
1712 | ||
1713 | tracking_evsel->tracking = true; | |
1714 | } | |
7630b3e2 WN |
1715 | |
1716 | struct perf_evsel * | |
1717 | perf_evlist__find_evsel_by_str(struct perf_evlist *evlist, | |
1718 | const char *str) | |
1719 | { | |
1720 | struct perf_evsel *evsel; | |
1721 | ||
e5cadb93 | 1722 | evlist__for_each_entry(evlist, evsel) { |
7630b3e2 WN |
1723 | if (!evsel->name) |
1724 | continue; | |
1725 | if (strcmp(str, evsel->name) == 0) | |
1726 | return evsel; | |
1727 | } | |
1728 | ||
1729 | return NULL; | |
1730 | } | |
54cc54de WN |
1731 | |
1732 | void perf_evlist__toggle_bkw_mmap(struct perf_evlist *evlist, | |
1733 | enum bkw_mmap_state state) | |
1734 | { | |
1735 | enum bkw_mmap_state old_state = evlist->bkw_mmap_state; | |
1736 | enum action { | |
1737 | NONE, | |
1738 | PAUSE, | |
1739 | RESUME, | |
1740 | } action = NONE; | |
1741 | ||
1742 | if (!evlist->backward_mmap) | |
1743 | return; | |
1744 | ||
1745 | switch (old_state) { | |
1746 | case BKW_MMAP_NOTREADY: { | |
1747 | if (state != BKW_MMAP_RUNNING) | |
1748 | goto state_err;; | |
1749 | break; | |
1750 | } | |
1751 | case BKW_MMAP_RUNNING: { | |
1752 | if (state != BKW_MMAP_DATA_PENDING) | |
1753 | goto state_err; | |
1754 | action = PAUSE; | |
1755 | break; | |
1756 | } | |
1757 | case BKW_MMAP_DATA_PENDING: { | |
1758 | if (state != BKW_MMAP_EMPTY) | |
1759 | goto state_err; | |
1760 | break; | |
1761 | } | |
1762 | case BKW_MMAP_EMPTY: { | |
1763 | if (state != BKW_MMAP_RUNNING) | |
1764 | goto state_err; | |
1765 | action = RESUME; | |
1766 | break; | |
1767 | } | |
1768 | default: | |
1769 | WARN_ONCE(1, "Shouldn't get there\n"); | |
1770 | } | |
1771 | ||
1772 | evlist->bkw_mmap_state = state; | |
1773 | ||
1774 | switch (action) { | |
1775 | case PAUSE: | |
1776 | perf_evlist__pause(evlist); | |
1777 | break; | |
1778 | case RESUME: | |
1779 | perf_evlist__resume(evlist); | |
1780 | break; | |
1781 | case NONE: | |
1782 | default: | |
1783 | break; | |
1784 | } | |
1785 | ||
1786 | state_err: | |
1787 | return; | |
1788 | } | |
5b0d1cb4 ACM |
1789 | |
1790 | bool perf_evlist__exclude_kernel(struct perf_evlist *evlist) | |
1791 | { | |
1792 | struct perf_evsel *evsel; | |
1793 | ||
1794 | evlist__for_each_entry(evlist, evsel) { | |
1795 | if (!evsel->attr.exclude_kernel) | |
1796 | return false; | |
1797 | } | |
1798 | ||
1799 | return true; | |
1800 | } |