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> |
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" |
35b9d88e | 18 | #include <unistd.h> |
361c99a6 | 19 | |
50d08e47 | 20 | #include "parse-events.h" |
4b6ab94e | 21 | #include <subcmd/parse-options.h> |
50d08e47 | 22 | |
f8a95309 ACM |
23 | #include <sys/mman.h> |
24 | ||
70db7533 ACM |
25 | #include <linux/bitops.h> |
26 | #include <linux/hash.h> | |
0389cd1f | 27 | #include <linux/log2.h> |
8dd2a131 | 28 | #include <linux/err.h> |
70db7533 | 29 | |
e4b356b5 ACM |
30 | static void perf_evlist__mmap_put(struct perf_evlist *evlist, int idx); |
31 | static void __perf_evlist__munmap(struct perf_evlist *evlist, int idx); | |
32 | ||
f8a95309 | 33 | #define FD(e, x, y) (*(int *)xyarray__entry(e->fd, x, y)) |
a91e5431 | 34 | #define SID(e, x, y) xyarray__entry(e->sample_id, x, y) |
f8a95309 | 35 | |
7e2ed097 ACM |
36 | void perf_evlist__init(struct perf_evlist *evlist, struct cpu_map *cpus, |
37 | struct thread_map *threads) | |
ef1d1af2 ACM |
38 | { |
39 | int i; | |
40 | ||
41 | for (i = 0; i < PERF_EVLIST__HLIST_SIZE; ++i) | |
42 | INIT_HLIST_HEAD(&evlist->heads[i]); | |
43 | INIT_LIST_HEAD(&evlist->entries); | |
7e2ed097 | 44 | perf_evlist__set_maps(evlist, cpus, threads); |
1b85337d | 45 | fdarray__init(&evlist->pollfd, 64); |
35b9d88e | 46 | evlist->workload.pid = -1; |
ef1d1af2 ACM |
47 | } |
48 | ||
334fe7a3 | 49 | struct perf_evlist *perf_evlist__new(void) |
361c99a6 ACM |
50 | { |
51 | struct perf_evlist *evlist = zalloc(sizeof(*evlist)); | |
52 | ||
ef1d1af2 | 53 | if (evlist != NULL) |
334fe7a3 | 54 | perf_evlist__init(evlist, NULL, NULL); |
361c99a6 ACM |
55 | |
56 | return evlist; | |
57 | } | |
58 | ||
b22d54b0 JO |
59 | struct perf_evlist *perf_evlist__new_default(void) |
60 | { | |
61 | struct perf_evlist *evlist = perf_evlist__new(); | |
62 | ||
63 | if (evlist && perf_evlist__add_default(evlist)) { | |
64 | perf_evlist__delete(evlist); | |
65 | evlist = NULL; | |
66 | } | |
67 | ||
68 | return evlist; | |
69 | } | |
70 | ||
5bae0250 ACM |
71 | struct perf_evlist *perf_evlist__new_dummy(void) |
72 | { | |
73 | struct perf_evlist *evlist = perf_evlist__new(); | |
74 | ||
75 | if (evlist && perf_evlist__add_dummy(evlist)) { | |
76 | perf_evlist__delete(evlist); | |
77 | evlist = NULL; | |
78 | } | |
79 | ||
80 | return evlist; | |
81 | } | |
82 | ||
75562573 AH |
83 | /** |
84 | * perf_evlist__set_id_pos - set the positions of event ids. | |
85 | * @evlist: selected event list | |
86 | * | |
87 | * Events with compatible sample types all have the same id_pos | |
88 | * and is_pos. For convenience, put a copy on evlist. | |
89 | */ | |
90 | void perf_evlist__set_id_pos(struct perf_evlist *evlist) | |
91 | { | |
92 | struct perf_evsel *first = perf_evlist__first(evlist); | |
93 | ||
94 | evlist->id_pos = first->id_pos; | |
95 | evlist->is_pos = first->is_pos; | |
96 | } | |
97 | ||
733cd2fe AH |
98 | static void perf_evlist__update_id_pos(struct perf_evlist *evlist) |
99 | { | |
100 | struct perf_evsel *evsel; | |
101 | ||
0050f7aa | 102 | evlist__for_each(evlist, evsel) |
733cd2fe AH |
103 | perf_evsel__calc_id_pos(evsel); |
104 | ||
105 | perf_evlist__set_id_pos(evlist); | |
106 | } | |
107 | ||
361c99a6 ACM |
108 | static void perf_evlist__purge(struct perf_evlist *evlist) |
109 | { | |
110 | struct perf_evsel *pos, *n; | |
111 | ||
0050f7aa | 112 | evlist__for_each_safe(evlist, n, pos) { |
361c99a6 | 113 | list_del_init(&pos->node); |
d49e4695 | 114 | pos->evlist = NULL; |
361c99a6 ACM |
115 | perf_evsel__delete(pos); |
116 | } | |
117 | ||
118 | evlist->nr_entries = 0; | |
119 | } | |
120 | ||
ef1d1af2 | 121 | void perf_evlist__exit(struct perf_evlist *evlist) |
361c99a6 | 122 | { |
04662523 | 123 | zfree(&evlist->mmap); |
1b85337d | 124 | fdarray__exit(&evlist->pollfd); |
ef1d1af2 ACM |
125 | } |
126 | ||
127 | void perf_evlist__delete(struct perf_evlist *evlist) | |
128 | { | |
983874d1 | 129 | perf_evlist__munmap(evlist); |
f26e1c7c | 130 | perf_evlist__close(evlist); |
f30a79b0 | 131 | cpu_map__put(evlist->cpus); |
186fbb74 | 132 | thread_map__put(evlist->threads); |
03ad9747 ACM |
133 | evlist->cpus = NULL; |
134 | evlist->threads = NULL; | |
ef1d1af2 ACM |
135 | perf_evlist__purge(evlist); |
136 | perf_evlist__exit(evlist); | |
361c99a6 ACM |
137 | free(evlist); |
138 | } | |
139 | ||
adc0c3e8 AH |
140 | static void __perf_evlist__propagate_maps(struct perf_evlist *evlist, |
141 | struct perf_evsel *evsel) | |
142 | { | |
143 | /* | |
144 | * We already have cpus for evsel (via PMU sysfs) so | |
145 | * keep it, if there's no target cpu list defined. | |
146 | */ | |
147 | if (!evsel->own_cpus || evlist->has_user_cpus) { | |
148 | cpu_map__put(evsel->cpus); | |
149 | evsel->cpus = cpu_map__get(evlist->cpus); | |
150 | } else if (evsel->cpus != evsel->own_cpus) { | |
151 | cpu_map__put(evsel->cpus); | |
152 | evsel->cpus = cpu_map__get(evsel->own_cpus); | |
153 | } | |
154 | ||
155 | thread_map__put(evsel->threads); | |
156 | evsel->threads = thread_map__get(evlist->threads); | |
157 | } | |
158 | ||
159 | static void perf_evlist__propagate_maps(struct perf_evlist *evlist) | |
160 | { | |
161 | struct perf_evsel *evsel; | |
162 | ||
163 | evlist__for_each(evlist, evsel) | |
164 | __perf_evlist__propagate_maps(evlist, evsel); | |
165 | } | |
166 | ||
361c99a6 ACM |
167 | void perf_evlist__add(struct perf_evlist *evlist, struct perf_evsel *entry) |
168 | { | |
d49e4695 | 169 | entry->evlist = evlist; |
361c99a6 | 170 | list_add_tail(&entry->node, &evlist->entries); |
ef503831 | 171 | entry->idx = evlist->nr_entries; |
60b0896c | 172 | entry->tracking = !entry->idx; |
ef503831 | 173 | |
75562573 AH |
174 | if (!evlist->nr_entries++) |
175 | perf_evlist__set_id_pos(evlist); | |
44c42d71 AH |
176 | |
177 | __perf_evlist__propagate_maps(evlist, entry); | |
361c99a6 ACM |
178 | } |
179 | ||
4768230a AH |
180 | void perf_evlist__remove(struct perf_evlist *evlist, struct perf_evsel *evsel) |
181 | { | |
182 | evsel->evlist = NULL; | |
183 | list_del_init(&evsel->node); | |
184 | evlist->nr_entries -= 1; | |
185 | } | |
186 | ||
0529bc1f | 187 | void perf_evlist__splice_list_tail(struct perf_evlist *evlist, |
f114d6ef | 188 | struct list_head *list) |
50d08e47 | 189 | { |
f114d6ef | 190 | struct perf_evsel *evsel, *temp; |
75562573 | 191 | |
f114d6ef AH |
192 | __evlist__for_each_safe(list, temp, evsel) { |
193 | list_del_init(&evsel->node); | |
194 | perf_evlist__add(evlist, evsel); | |
195 | } | |
50d08e47 ACM |
196 | } |
197 | ||
63dab225 ACM |
198 | void __perf_evlist__set_leader(struct list_head *list) |
199 | { | |
200 | struct perf_evsel *evsel, *leader; | |
201 | ||
202 | leader = list_entry(list->next, struct perf_evsel, node); | |
97f63e4a NK |
203 | evsel = list_entry(list->prev, struct perf_evsel, node); |
204 | ||
205 | leader->nr_members = evsel->idx - leader->idx + 1; | |
63dab225 | 206 | |
0050f7aa | 207 | __evlist__for_each(list, evsel) { |
74b2133d | 208 | evsel->leader = leader; |
63dab225 ACM |
209 | } |
210 | } | |
211 | ||
212 | void perf_evlist__set_leader(struct perf_evlist *evlist) | |
6a4bb04c | 213 | { |
97f63e4a NK |
214 | if (evlist->nr_entries) { |
215 | evlist->nr_groups = evlist->nr_entries > 1 ? 1 : 0; | |
63dab225 | 216 | __perf_evlist__set_leader(&evlist->entries); |
97f63e4a | 217 | } |
6a4bb04c JO |
218 | } |
219 | ||
45cf6c33 | 220 | void perf_event_attr__set_max_precise_ip(struct perf_event_attr *attr) |
7f8d1ade ACM |
221 | { |
222 | attr->precise_ip = 3; | |
223 | ||
224 | while (attr->precise_ip != 0) { | |
225 | int fd = sys_perf_event_open(attr, 0, -1, -1, 0); | |
226 | if (fd != -1) { | |
227 | close(fd); | |
228 | break; | |
229 | } | |
230 | --attr->precise_ip; | |
231 | } | |
232 | } | |
233 | ||
361c99a6 ACM |
234 | int perf_evlist__add_default(struct perf_evlist *evlist) |
235 | { | |
236 | struct perf_event_attr attr = { | |
237 | .type = PERF_TYPE_HARDWARE, | |
238 | .config = PERF_COUNT_HW_CPU_CYCLES, | |
239 | }; | |
1aed2671 JR |
240 | struct perf_evsel *evsel; |
241 | ||
242 | event_attr_init(&attr); | |
361c99a6 | 243 | |
7f8d1ade ACM |
244 | perf_event_attr__set_max_precise_ip(&attr); |
245 | ||
ef503831 | 246 | evsel = perf_evsel__new(&attr); |
361c99a6 | 247 | if (evsel == NULL) |
cc2d86b0 SE |
248 | goto error; |
249 | ||
7f8d1ade ACM |
250 | /* use asprintf() because free(evsel) assumes name is allocated */ |
251 | if (asprintf(&evsel->name, "cycles%.*s", | |
252 | attr.precise_ip ? attr.precise_ip + 1 : 0, ":ppp") < 0) | |
cc2d86b0 | 253 | goto error_free; |
361c99a6 ACM |
254 | |
255 | perf_evlist__add(evlist, evsel); | |
256 | return 0; | |
cc2d86b0 SE |
257 | error_free: |
258 | perf_evsel__delete(evsel); | |
259 | error: | |
260 | return -ENOMEM; | |
361c99a6 | 261 | } |
5c581041 | 262 | |
5bae0250 ACM |
263 | int perf_evlist__add_dummy(struct perf_evlist *evlist) |
264 | { | |
265 | struct perf_event_attr attr = { | |
266 | .type = PERF_TYPE_SOFTWARE, | |
267 | .config = PERF_COUNT_SW_DUMMY, | |
268 | .size = sizeof(attr), /* to capture ABI version */ | |
269 | }; | |
270 | struct perf_evsel *evsel = perf_evsel__new(&attr); | |
271 | ||
272 | if (evsel == NULL) | |
273 | return -ENOMEM; | |
274 | ||
275 | perf_evlist__add(evlist, evsel); | |
276 | return 0; | |
277 | } | |
278 | ||
e60fc847 ACM |
279 | static int perf_evlist__add_attrs(struct perf_evlist *evlist, |
280 | struct perf_event_attr *attrs, size_t nr_attrs) | |
50d08e47 ACM |
281 | { |
282 | struct perf_evsel *evsel, *n; | |
283 | LIST_HEAD(head); | |
284 | size_t i; | |
285 | ||
286 | for (i = 0; i < nr_attrs; i++) { | |
ef503831 | 287 | evsel = perf_evsel__new_idx(attrs + i, evlist->nr_entries + i); |
50d08e47 ACM |
288 | if (evsel == NULL) |
289 | goto out_delete_partial_list; | |
290 | list_add_tail(&evsel->node, &head); | |
291 | } | |
292 | ||
f114d6ef | 293 | perf_evlist__splice_list_tail(evlist, &head); |
50d08e47 ACM |
294 | |
295 | return 0; | |
296 | ||
297 | out_delete_partial_list: | |
0050f7aa | 298 | __evlist__for_each_safe(&head, n, evsel) |
50d08e47 ACM |
299 | perf_evsel__delete(evsel); |
300 | return -1; | |
301 | } | |
302 | ||
79695e1b ACM |
303 | int __perf_evlist__add_default_attrs(struct perf_evlist *evlist, |
304 | struct perf_event_attr *attrs, size_t nr_attrs) | |
305 | { | |
306 | size_t i; | |
307 | ||
308 | for (i = 0; i < nr_attrs; i++) | |
309 | event_attr_init(attrs + i); | |
310 | ||
311 | return perf_evlist__add_attrs(evlist, attrs, nr_attrs); | |
312 | } | |
313 | ||
da378962 ACM |
314 | struct perf_evsel * |
315 | perf_evlist__find_tracepoint_by_id(struct perf_evlist *evlist, int id) | |
ee29be62 ACM |
316 | { |
317 | struct perf_evsel *evsel; | |
318 | ||
0050f7aa | 319 | evlist__for_each(evlist, evsel) { |
ee29be62 ACM |
320 | if (evsel->attr.type == PERF_TYPE_TRACEPOINT && |
321 | (int)evsel->attr.config == id) | |
322 | return evsel; | |
323 | } | |
324 | ||
325 | return NULL; | |
326 | } | |
327 | ||
a2f2804a DA |
328 | struct perf_evsel * |
329 | perf_evlist__find_tracepoint_by_name(struct perf_evlist *evlist, | |
330 | const char *name) | |
331 | { | |
332 | struct perf_evsel *evsel; | |
333 | ||
0050f7aa | 334 | evlist__for_each(evlist, evsel) { |
a2f2804a DA |
335 | if ((evsel->attr.type == PERF_TYPE_TRACEPOINT) && |
336 | (strcmp(evsel->name, name) == 0)) | |
337 | return evsel; | |
338 | } | |
339 | ||
340 | return NULL; | |
341 | } | |
342 | ||
39876e7d ACM |
343 | int perf_evlist__add_newtp(struct perf_evlist *evlist, |
344 | const char *sys, const char *name, void *handler) | |
345 | { | |
ef503831 | 346 | struct perf_evsel *evsel = perf_evsel__newtp(sys, name); |
39876e7d | 347 | |
8dd2a131 | 348 | if (IS_ERR(evsel)) |
39876e7d ACM |
349 | return -1; |
350 | ||
744a9719 | 351 | evsel->handler = handler; |
39876e7d ACM |
352 | perf_evlist__add(evlist, evsel); |
353 | return 0; | |
354 | } | |
355 | ||
bf8e8f4b AH |
356 | static int perf_evlist__nr_threads(struct perf_evlist *evlist, |
357 | struct perf_evsel *evsel) | |
358 | { | |
359 | if (evsel->system_wide) | |
360 | return 1; | |
361 | else | |
362 | return thread_map__nr(evlist->threads); | |
363 | } | |
364 | ||
4152ab37 ACM |
365 | void perf_evlist__disable(struct perf_evlist *evlist) |
366 | { | |
4152ab37 | 367 | struct perf_evsel *pos; |
3e27c920 JO |
368 | |
369 | evlist__for_each(evlist, pos) { | |
370 | if (!perf_evsel__is_group_leader(pos) || !pos->fd) | |
371 | continue; | |
372 | perf_evsel__disable(pos); | |
4152ab37 | 373 | } |
2b56bcfb ACM |
374 | |
375 | evlist->enabled = false; | |
4152ab37 ACM |
376 | } |
377 | ||
764e16a3 DA |
378 | void perf_evlist__enable(struct perf_evlist *evlist) |
379 | { | |
764e16a3 | 380 | struct perf_evsel *pos; |
3e27c920 JO |
381 | |
382 | evlist__for_each(evlist, pos) { | |
383 | if (!perf_evsel__is_group_leader(pos) || !pos->fd) | |
384 | continue; | |
385 | perf_evsel__enable(pos); | |
764e16a3 | 386 | } |
2b56bcfb ACM |
387 | |
388 | evlist->enabled = true; | |
389 | } | |
390 | ||
391 | void perf_evlist__toggle_enable(struct perf_evlist *evlist) | |
392 | { | |
393 | (evlist->enabled ? perf_evlist__disable : perf_evlist__enable)(evlist); | |
764e16a3 DA |
394 | } |
395 | ||
1c65056c AH |
396 | static int perf_evlist__enable_event_cpu(struct perf_evlist *evlist, |
397 | struct perf_evsel *evsel, int cpu) | |
398 | { | |
399 | int thread, err; | |
400 | int nr_threads = perf_evlist__nr_threads(evlist, evsel); | |
401 | ||
402 | if (!evsel->fd) | |
403 | return -EINVAL; | |
404 | ||
405 | for (thread = 0; thread < nr_threads; thread++) { | |
406 | err = ioctl(FD(evsel, cpu, thread), | |
407 | PERF_EVENT_IOC_ENABLE, 0); | |
408 | if (err) | |
409 | return err; | |
410 | } | |
411 | return 0; | |
412 | } | |
413 | ||
414 | static int perf_evlist__enable_event_thread(struct perf_evlist *evlist, | |
415 | struct perf_evsel *evsel, | |
416 | int thread) | |
417 | { | |
418 | int cpu, err; | |
419 | int nr_cpus = cpu_map__nr(evlist->cpus); | |
420 | ||
421 | if (!evsel->fd) | |
422 | return -EINVAL; | |
423 | ||
424 | for (cpu = 0; cpu < nr_cpus; cpu++) { | |
425 | err = ioctl(FD(evsel, cpu, thread), PERF_EVENT_IOC_ENABLE, 0); | |
426 | if (err) | |
427 | return err; | |
428 | } | |
429 | return 0; | |
430 | } | |
431 | ||
432 | int perf_evlist__enable_event_idx(struct perf_evlist *evlist, | |
433 | struct perf_evsel *evsel, int idx) | |
434 | { | |
435 | bool per_cpu_mmaps = !cpu_map__empty(evlist->cpus); | |
436 | ||
437 | if (per_cpu_mmaps) | |
438 | return perf_evlist__enable_event_cpu(evlist, evsel, idx); | |
439 | else | |
440 | return perf_evlist__enable_event_thread(evlist, evsel, idx); | |
441 | } | |
442 | ||
ad6765dd | 443 | int perf_evlist__alloc_pollfd(struct perf_evlist *evlist) |
5c581041 | 444 | { |
b3a319d5 NK |
445 | int nr_cpus = cpu_map__nr(evlist->cpus); |
446 | int nr_threads = thread_map__nr(evlist->threads); | |
bf8e8f4b AH |
447 | int nfds = 0; |
448 | struct perf_evsel *evsel; | |
449 | ||
cba9b847 | 450 | evlist__for_each(evlist, evsel) { |
bf8e8f4b AH |
451 | if (evsel->system_wide) |
452 | nfds += nr_cpus; | |
453 | else | |
454 | nfds += nr_cpus * nr_threads; | |
455 | } | |
456 | ||
1b85337d ACM |
457 | if (fdarray__available_entries(&evlist->pollfd) < nfds && |
458 | fdarray__grow(&evlist->pollfd, nfds) < 0) | |
ad6765dd ACM |
459 | return -ENOMEM; |
460 | ||
461 | return 0; | |
5c581041 | 462 | } |
70082dd9 | 463 | |
e4b356b5 ACM |
464 | static int __perf_evlist__add_pollfd(struct perf_evlist *evlist, int fd, int idx) |
465 | { | |
466 | int pos = fdarray__add(&evlist->pollfd, fd, POLLIN | POLLERR | POLLHUP); | |
467 | /* | |
468 | * Save the idx so that when we filter out fds POLLHUP'ed we can | |
469 | * close the associated evlist->mmap[] entry. | |
470 | */ | |
471 | if (pos >= 0) { | |
472 | evlist->pollfd.priv[pos].idx = idx; | |
473 | ||
474 | fcntl(fd, F_SETFL, O_NONBLOCK); | |
475 | } | |
476 | ||
477 | return pos; | |
478 | } | |
479 | ||
ad6765dd | 480 | int perf_evlist__add_pollfd(struct perf_evlist *evlist, int fd) |
70082dd9 | 481 | { |
e4b356b5 ACM |
482 | return __perf_evlist__add_pollfd(evlist, fd, -1); |
483 | } | |
484 | ||
485 | static void perf_evlist__munmap_filtered(struct fdarray *fda, int fd) | |
486 | { | |
487 | struct perf_evlist *evlist = container_of(fda, struct perf_evlist, pollfd); | |
1b85337d | 488 | |
e4b356b5 | 489 | perf_evlist__mmap_put(evlist, fda->priv[fd].idx); |
70082dd9 | 490 | } |
70db7533 | 491 | |
1ddec7f0 ACM |
492 | int perf_evlist__filter_pollfd(struct perf_evlist *evlist, short revents_and_mask) |
493 | { | |
e4b356b5 ACM |
494 | return fdarray__filter(&evlist->pollfd, revents_and_mask, |
495 | perf_evlist__munmap_filtered); | |
1ddec7f0 ACM |
496 | } |
497 | ||
f66a889d ACM |
498 | int perf_evlist__poll(struct perf_evlist *evlist, int timeout) |
499 | { | |
1b85337d | 500 | return fdarray__poll(&evlist->pollfd, timeout); |
f66a889d ACM |
501 | } |
502 | ||
a91e5431 ACM |
503 | static void perf_evlist__id_hash(struct perf_evlist *evlist, |
504 | struct perf_evsel *evsel, | |
505 | int cpu, int thread, u64 id) | |
3d3b5e95 ACM |
506 | { |
507 | int hash; | |
508 | struct perf_sample_id *sid = SID(evsel, cpu, thread); | |
509 | ||
510 | sid->id = id; | |
511 | sid->evsel = evsel; | |
512 | hash = hash_64(sid->id, PERF_EVLIST__HLIST_BITS); | |
513 | hlist_add_head(&sid->node, &evlist->heads[hash]); | |
514 | } | |
515 | ||
a91e5431 ACM |
516 | void perf_evlist__id_add(struct perf_evlist *evlist, struct perf_evsel *evsel, |
517 | int cpu, int thread, u64 id) | |
518 | { | |
519 | perf_evlist__id_hash(evlist, evsel, cpu, thread, id); | |
520 | evsel->id[evsel->ids++] = id; | |
521 | } | |
522 | ||
1c59612d JO |
523 | int perf_evlist__id_add_fd(struct perf_evlist *evlist, |
524 | struct perf_evsel *evsel, | |
525 | int cpu, int thread, int fd) | |
f8a95309 | 526 | { |
f8a95309 | 527 | u64 read_data[4] = { 0, }; |
3d3b5e95 | 528 | int id_idx = 1; /* The first entry is the counter value */ |
e2b5abe0 JO |
529 | u64 id; |
530 | int ret; | |
531 | ||
532 | ret = ioctl(fd, PERF_EVENT_IOC_ID, &id); | |
533 | if (!ret) | |
534 | goto add; | |
535 | ||
536 | if (errno != ENOTTY) | |
537 | return -1; | |
538 | ||
539 | /* Legacy way to get event id.. All hail to old kernels! */ | |
f8a95309 | 540 | |
c4861afe JO |
541 | /* |
542 | * This way does not work with group format read, so bail | |
543 | * out in that case. | |
544 | */ | |
545 | if (perf_evlist__read_format(evlist) & PERF_FORMAT_GROUP) | |
546 | return -1; | |
547 | ||
f8a95309 ACM |
548 | if (!(evsel->attr.read_format & PERF_FORMAT_ID) || |
549 | read(fd, &read_data, sizeof(read_data)) == -1) | |
550 | return -1; | |
551 | ||
552 | if (evsel->attr.read_format & PERF_FORMAT_TOTAL_TIME_ENABLED) | |
553 | ++id_idx; | |
554 | if (evsel->attr.read_format & PERF_FORMAT_TOTAL_TIME_RUNNING) | |
555 | ++id_idx; | |
556 | ||
e2b5abe0 JO |
557 | id = read_data[id_idx]; |
558 | ||
559 | add: | |
560 | perf_evlist__id_add(evlist, evsel, cpu, thread, id); | |
f8a95309 ACM |
561 | return 0; |
562 | } | |
563 | ||
3c659eed AH |
564 | static void perf_evlist__set_sid_idx(struct perf_evlist *evlist, |
565 | struct perf_evsel *evsel, int idx, int cpu, | |
566 | int thread) | |
567 | { | |
568 | struct perf_sample_id *sid = SID(evsel, cpu, thread); | |
569 | sid->idx = idx; | |
570 | if (evlist->cpus && cpu >= 0) | |
571 | sid->cpu = evlist->cpus->map[cpu]; | |
572 | else | |
573 | sid->cpu = -1; | |
574 | if (!evsel->system_wide && evlist->threads && thread >= 0) | |
e13798c7 | 575 | sid->tid = thread_map__pid(evlist->threads, thread); |
3c659eed AH |
576 | else |
577 | sid->tid = -1; | |
578 | } | |
579 | ||
932a3594 | 580 | struct perf_sample_id *perf_evlist__id2sid(struct perf_evlist *evlist, u64 id) |
70db7533 ACM |
581 | { |
582 | struct hlist_head *head; | |
70db7533 ACM |
583 | struct perf_sample_id *sid; |
584 | int hash; | |
585 | ||
70db7533 ACM |
586 | hash = hash_64(id, PERF_EVLIST__HLIST_BITS); |
587 | head = &evlist->heads[hash]; | |
588 | ||
b67bfe0d | 589 | hlist_for_each_entry(sid, head, node) |
70db7533 | 590 | if (sid->id == id) |
932a3594 JO |
591 | return sid; |
592 | ||
593 | return NULL; | |
594 | } | |
595 | ||
596 | struct perf_evsel *perf_evlist__id2evsel(struct perf_evlist *evlist, u64 id) | |
597 | { | |
598 | struct perf_sample_id *sid; | |
599 | ||
05169df5 | 600 | if (evlist->nr_entries == 1 || !id) |
932a3594 JO |
601 | return perf_evlist__first(evlist); |
602 | ||
603 | sid = perf_evlist__id2sid(evlist, id); | |
604 | if (sid) | |
605 | return sid->evsel; | |
30e68bcc NK |
606 | |
607 | if (!perf_evlist__sample_id_all(evlist)) | |
0c21f736 | 608 | return perf_evlist__first(evlist); |
30e68bcc | 609 | |
70db7533 ACM |
610 | return NULL; |
611 | } | |
04391deb | 612 | |
dddcf6ab AH |
613 | struct perf_evsel *perf_evlist__id2evsel_strict(struct perf_evlist *evlist, |
614 | u64 id) | |
615 | { | |
616 | struct perf_sample_id *sid; | |
617 | ||
618 | if (!id) | |
619 | return NULL; | |
620 | ||
621 | sid = perf_evlist__id2sid(evlist, id); | |
622 | if (sid) | |
623 | return sid->evsel; | |
624 | ||
625 | return NULL; | |
626 | } | |
627 | ||
75562573 AH |
628 | static int perf_evlist__event2id(struct perf_evlist *evlist, |
629 | union perf_event *event, u64 *id) | |
630 | { | |
631 | const u64 *array = event->sample.array; | |
632 | ssize_t n; | |
633 | ||
634 | n = (event->header.size - sizeof(event->header)) >> 3; | |
635 | ||
636 | if (event->header.type == PERF_RECORD_SAMPLE) { | |
637 | if (evlist->id_pos >= n) | |
638 | return -1; | |
639 | *id = array[evlist->id_pos]; | |
640 | } else { | |
641 | if (evlist->is_pos > n) | |
642 | return -1; | |
643 | n -= evlist->is_pos; | |
644 | *id = array[n]; | |
645 | } | |
646 | return 0; | |
647 | } | |
648 | ||
649 | static struct perf_evsel *perf_evlist__event2evsel(struct perf_evlist *evlist, | |
650 | union perf_event *event) | |
651 | { | |
98be6966 | 652 | struct perf_evsel *first = perf_evlist__first(evlist); |
75562573 AH |
653 | struct hlist_head *head; |
654 | struct perf_sample_id *sid; | |
655 | int hash; | |
656 | u64 id; | |
657 | ||
658 | if (evlist->nr_entries == 1) | |
98be6966 AH |
659 | return first; |
660 | ||
661 | if (!first->attr.sample_id_all && | |
662 | event->header.type != PERF_RECORD_SAMPLE) | |
663 | return first; | |
75562573 AH |
664 | |
665 | if (perf_evlist__event2id(evlist, event, &id)) | |
666 | return NULL; | |
667 | ||
668 | /* Synthesized events have an id of zero */ | |
669 | if (!id) | |
98be6966 | 670 | return first; |
75562573 AH |
671 | |
672 | hash = hash_64(id, PERF_EVLIST__HLIST_BITS); | |
673 | head = &evlist->heads[hash]; | |
674 | ||
675 | hlist_for_each_entry(sid, head, node) { | |
676 | if (sid->id == id) | |
677 | return sid->evsel; | |
678 | } | |
679 | return NULL; | |
680 | } | |
681 | ||
b6b85dad | 682 | /* When check_messup is true, 'end' must points to a good entry */ |
0f4ccd11 | 683 | static union perf_event * |
b6b85dad WN |
684 | perf_mmap__read(struct perf_mmap *md, bool check_messup, u64 start, |
685 | u64 end, u64 *prev) | |
04391deb | 686 | { |
04391deb | 687 | unsigned char *data = md->base + page_size; |
8115d60c | 688 | union perf_event *event = NULL; |
b6b85dad | 689 | int diff = end - start; |
04391deb | 690 | |
b6b85dad | 691 | if (check_messup) { |
04391deb | 692 | /* |
7bb41152 ACM |
693 | * If we're further behind than half the buffer, there's a chance |
694 | * the writer will bite our tail and mess up the samples under us. | |
695 | * | |
b6b85dad | 696 | * If we somehow ended up ahead of the 'end', we got messed up. |
7bb41152 | 697 | * |
b6b85dad | 698 | * In either case, truncate and restart at 'end'. |
04391deb | 699 | */ |
7bb41152 ACM |
700 | if (diff > md->mask / 2 || diff < 0) { |
701 | fprintf(stderr, "WARNING: failed to keep up with mmap data.\n"); | |
702 | ||
703 | /* | |
b6b85dad | 704 | * 'end' points to a known good entry, start there. |
7bb41152 | 705 | */ |
b6b85dad | 706 | start = end; |
b04b7023 | 707 | diff = 0; |
7bb41152 | 708 | } |
04391deb ACM |
709 | } |
710 | ||
b04b7023 | 711 | if (diff >= (int)sizeof(event->header)) { |
04391deb ACM |
712 | size_t size; |
713 | ||
b6b85dad | 714 | event = (union perf_event *)&data[start & md->mask]; |
04391deb ACM |
715 | size = event->header.size; |
716 | ||
b04b7023 WN |
717 | if (size < sizeof(event->header) || diff < (int)size) { |
718 | event = NULL; | |
719 | goto broken_event; | |
720 | } | |
721 | ||
04391deb ACM |
722 | /* |
723 | * Event straddles the mmap boundary -- header should always | |
724 | * be inside due to u64 alignment of output. | |
725 | */ | |
b6b85dad WN |
726 | if ((start & md->mask) + size != ((start + size) & md->mask)) { |
727 | unsigned int offset = start; | |
04391deb | 728 | unsigned int len = min(sizeof(*event), size), cpy; |
a65cb4b9 | 729 | void *dst = md->event_copy; |
04391deb ACM |
730 | |
731 | do { | |
732 | cpy = min(md->mask + 1 - (offset & md->mask), len); | |
733 | memcpy(dst, &data[offset & md->mask], cpy); | |
734 | offset += cpy; | |
735 | dst += cpy; | |
736 | len -= cpy; | |
737 | } while (len); | |
738 | ||
a65cb4b9 | 739 | event = (union perf_event *) md->event_copy; |
04391deb ACM |
740 | } |
741 | ||
b6b85dad | 742 | start += size; |
04391deb ACM |
743 | } |
744 | ||
b04b7023 | 745 | broken_event: |
0f4ccd11 | 746 | if (prev) |
b6b85dad | 747 | *prev = start; |
7bb41152 | 748 | |
04391deb ACM |
749 | return event; |
750 | } | |
f8a95309 | 751 | |
0f4ccd11 WN |
752 | union perf_event *perf_evlist__mmap_read(struct perf_evlist *evlist, int idx) |
753 | { | |
754 | struct perf_mmap *md = &evlist->mmap[idx]; | |
755 | u64 head; | |
756 | u64 old = md->prev; | |
757 | ||
758 | /* | |
759 | * Check if event was unmapped due to a POLLHUP/POLLERR. | |
760 | */ | |
761 | if (!atomic_read(&md->refcnt)) | |
762 | return NULL; | |
763 | ||
764 | head = perf_mmap__read_head(md); | |
765 | ||
b6b85dad | 766 | return perf_mmap__read(md, evlist->overwrite, old, head, &md->prev); |
0f4ccd11 WN |
767 | } |
768 | ||
e24c7520 WN |
769 | union perf_event * |
770 | perf_evlist__mmap_read_backward(struct perf_evlist *evlist, int idx) | |
771 | { | |
772 | struct perf_mmap *md = &evlist->mmap[idx]; | |
773 | u64 head, end; | |
774 | u64 start = md->prev; | |
775 | ||
776 | /* | |
777 | * Check if event was unmapped due to a POLLHUP/POLLERR. | |
778 | */ | |
779 | if (!atomic_read(&md->refcnt)) | |
780 | return NULL; | |
781 | ||
782 | head = perf_mmap__read_head(md); | |
783 | if (!head) | |
784 | return NULL; | |
785 | ||
786 | /* | |
787 | * 'head' pointer starts from 0. Kernel minus sizeof(record) form | |
788 | * it each time when kernel writes to it, so in fact 'head' is | |
789 | * negative. 'end' pointer is made manually by adding the size of | |
790 | * the ring buffer to 'head' pointer, means the validate data can | |
791 | * read is the whole ring buffer. If 'end' is positive, the ring | |
792 | * buffer has not fully filled, so we must adjust 'end' to 0. | |
793 | * | |
794 | * However, since both 'head' and 'end' is unsigned, we can't | |
795 | * simply compare 'end' against 0. Here we compare '-head' and | |
796 | * the size of the ring buffer, where -head is the number of bytes | |
797 | * kernel write to the ring buffer. | |
798 | */ | |
799 | if (-head < (u64)(md->mask + 1)) | |
800 | end = 0; | |
801 | else | |
802 | end = head + md->mask + 1; | |
803 | ||
804 | return perf_mmap__read(md, false, start, end, &md->prev); | |
805 | } | |
806 | ||
807 | void perf_evlist__mmap_read_catchup(struct perf_evlist *evlist, int idx) | |
808 | { | |
809 | struct perf_mmap *md = &evlist->mmap[idx]; | |
810 | u64 head; | |
811 | ||
812 | if (!atomic_read(&md->refcnt)) | |
813 | return; | |
814 | ||
815 | head = perf_mmap__read_head(md); | |
816 | md->prev = head; | |
817 | } | |
818 | ||
82396986 ACM |
819 | static bool perf_mmap__empty(struct perf_mmap *md) |
820 | { | |
b72e74d1 | 821 | return perf_mmap__read_head(md) == md->prev && !md->auxtrace_mmap.base; |
82396986 ACM |
822 | } |
823 | ||
824 | static void perf_evlist__mmap_get(struct perf_evlist *evlist, int idx) | |
825 | { | |
7143849a | 826 | atomic_inc(&evlist->mmap[idx].refcnt); |
82396986 ACM |
827 | } |
828 | ||
829 | static void perf_evlist__mmap_put(struct perf_evlist *evlist, int idx) | |
830 | { | |
7143849a | 831 | BUG_ON(atomic_read(&evlist->mmap[idx].refcnt) == 0); |
82396986 | 832 | |
7143849a | 833 | if (atomic_dec_and_test(&evlist->mmap[idx].refcnt)) |
82396986 ACM |
834 | __perf_evlist__munmap(evlist, idx); |
835 | } | |
836 | ||
8e50d384 ZZ |
837 | void perf_evlist__mmap_consume(struct perf_evlist *evlist, int idx) |
838 | { | |
82396986 ACM |
839 | struct perf_mmap *md = &evlist->mmap[idx]; |
840 | ||
8e50d384 | 841 | if (!evlist->overwrite) { |
7b8283b5 | 842 | u64 old = md->prev; |
8e50d384 ZZ |
843 | |
844 | perf_mmap__write_tail(md, old); | |
845 | } | |
82396986 | 846 | |
7143849a | 847 | if (atomic_read(&md->refcnt) == 1 && perf_mmap__empty(md)) |
82396986 | 848 | perf_evlist__mmap_put(evlist, idx); |
8e50d384 ZZ |
849 | } |
850 | ||
718c602d AH |
851 | int __weak auxtrace_mmap__mmap(struct auxtrace_mmap *mm __maybe_unused, |
852 | struct auxtrace_mmap_params *mp __maybe_unused, | |
853 | void *userpg __maybe_unused, | |
854 | int fd __maybe_unused) | |
855 | { | |
856 | return 0; | |
857 | } | |
858 | ||
859 | void __weak auxtrace_mmap__munmap(struct auxtrace_mmap *mm __maybe_unused) | |
860 | { | |
861 | } | |
862 | ||
863 | void __weak auxtrace_mmap_params__init( | |
864 | struct auxtrace_mmap_params *mp __maybe_unused, | |
865 | off_t auxtrace_offset __maybe_unused, | |
866 | unsigned int auxtrace_pages __maybe_unused, | |
867 | bool auxtrace_overwrite __maybe_unused) | |
868 | { | |
869 | } | |
870 | ||
871 | void __weak auxtrace_mmap_params__set_idx( | |
872 | struct auxtrace_mmap_params *mp __maybe_unused, | |
873 | struct perf_evlist *evlist __maybe_unused, | |
874 | int idx __maybe_unused, | |
875 | bool per_cpu __maybe_unused) | |
876 | { | |
877 | } | |
878 | ||
93edcbd9 AH |
879 | static void __perf_evlist__munmap(struct perf_evlist *evlist, int idx) |
880 | { | |
881 | if (evlist->mmap[idx].base != NULL) { | |
882 | munmap(evlist->mmap[idx].base, evlist->mmap_len); | |
883 | evlist->mmap[idx].base = NULL; | |
7143849a | 884 | atomic_set(&evlist->mmap[idx].refcnt, 0); |
93edcbd9 | 885 | } |
718c602d | 886 | auxtrace_mmap__munmap(&evlist->mmap[idx].auxtrace_mmap); |
93edcbd9 AH |
887 | } |
888 | ||
7e2ed097 | 889 | void perf_evlist__munmap(struct perf_evlist *evlist) |
f8a95309 | 890 | { |
aece948f | 891 | int i; |
f8a95309 | 892 | |
983874d1 ACM |
893 | if (evlist->mmap == NULL) |
894 | return; | |
895 | ||
93edcbd9 AH |
896 | for (i = 0; i < evlist->nr_mmaps; i++) |
897 | __perf_evlist__munmap(evlist, i); | |
aece948f | 898 | |
04662523 | 899 | zfree(&evlist->mmap); |
f8a95309 ACM |
900 | } |
901 | ||
806fb630 | 902 | static int perf_evlist__alloc_mmap(struct perf_evlist *evlist) |
f8a95309 | 903 | { |
a14bb7a6 | 904 | evlist->nr_mmaps = cpu_map__nr(evlist->cpus); |
ec1e7e43 | 905 | if (cpu_map__empty(evlist->cpus)) |
b3a319d5 | 906 | evlist->nr_mmaps = thread_map__nr(evlist->threads); |
aece948f | 907 | evlist->mmap = zalloc(evlist->nr_mmaps * sizeof(struct perf_mmap)); |
f8a95309 ACM |
908 | return evlist->mmap != NULL ? 0 : -ENOMEM; |
909 | } | |
910 | ||
a8a8f3eb AH |
911 | struct mmap_params { |
912 | int prot; | |
913 | int mask; | |
718c602d | 914 | struct auxtrace_mmap_params auxtrace_mp; |
a8a8f3eb AH |
915 | }; |
916 | ||
917 | static int __perf_evlist__mmap(struct perf_evlist *evlist, int idx, | |
918 | struct mmap_params *mp, int fd) | |
f8a95309 | 919 | { |
82396986 ACM |
920 | /* |
921 | * The last one will be done at perf_evlist__mmap_consume(), so that we | |
922 | * make sure we don't prevent tools from consuming every last event in | |
923 | * the ring buffer. | |
924 | * | |
925 | * I.e. we can get the POLLHUP meaning that the fd doesn't exist | |
926 | * anymore, but the last events for it are still in the ring buffer, | |
927 | * waiting to be consumed. | |
928 | * | |
929 | * Tools can chose to ignore this at their own discretion, but the | |
930 | * evlist layer can't just drop it when filtering events in | |
931 | * perf_evlist__filter_pollfd(). | |
932 | */ | |
7143849a | 933 | atomic_set(&evlist->mmap[idx].refcnt, 2); |
aece948f | 934 | evlist->mmap[idx].prev = 0; |
a8a8f3eb AH |
935 | evlist->mmap[idx].mask = mp->mask; |
936 | evlist->mmap[idx].base = mmap(NULL, evlist->mmap_len, mp->prot, | |
f8a95309 | 937 | MAP_SHARED, fd, 0); |
301b195d | 938 | if (evlist->mmap[idx].base == MAP_FAILED) { |
02635965 AH |
939 | pr_debug2("failed to mmap perf event ring buffer, error %d\n", |
940 | errno); | |
301b195d | 941 | evlist->mmap[idx].base = NULL; |
f8a95309 | 942 | return -1; |
301b195d | 943 | } |
ad6765dd | 944 | |
718c602d AH |
945 | if (auxtrace_mmap__mmap(&evlist->mmap[idx].auxtrace_mmap, |
946 | &mp->auxtrace_mp, evlist->mmap[idx].base, fd)) | |
947 | return -1; | |
948 | ||
f8a95309 ACM |
949 | return 0; |
950 | } | |
951 | ||
04e21314 | 952 | static int perf_evlist__mmap_per_evsel(struct perf_evlist *evlist, int idx, |
a8a8f3eb AH |
953 | struct mmap_params *mp, int cpu, |
954 | int thread, int *output) | |
aece948f ACM |
955 | { |
956 | struct perf_evsel *evsel; | |
04e21314 | 957 | |
0050f7aa | 958 | evlist__for_each(evlist, evsel) { |
bf8e8f4b AH |
959 | int fd; |
960 | ||
961 | if (evsel->system_wide && thread) | |
962 | continue; | |
963 | ||
964 | fd = FD(evsel, cpu, thread); | |
04e21314 AH |
965 | |
966 | if (*output == -1) { | |
967 | *output = fd; | |
a8a8f3eb | 968 | if (__perf_evlist__mmap(evlist, idx, mp, *output) < 0) |
04e21314 AH |
969 | return -1; |
970 | } else { | |
971 | if (ioctl(fd, PERF_EVENT_IOC_SET_OUTPUT, *output) != 0) | |
972 | return -1; | |
82396986 ACM |
973 | |
974 | perf_evlist__mmap_get(evlist, idx); | |
04e21314 AH |
975 | } |
976 | ||
f90d194a AH |
977 | /* |
978 | * The system_wide flag causes a selected event to be opened | |
979 | * always without a pid. Consequently it will never get a | |
980 | * POLLHUP, but it is used for tracking in combination with | |
981 | * other events, so it should not need to be polled anyway. | |
982 | * Therefore don't add it for polling. | |
983 | */ | |
984 | if (!evsel->system_wide && | |
985 | __perf_evlist__add_pollfd(evlist, fd, idx) < 0) { | |
82396986 | 986 | perf_evlist__mmap_put(evlist, idx); |
ad6765dd | 987 | return -1; |
82396986 | 988 | } |
033fa713 | 989 | |
3c659eed AH |
990 | if (evsel->attr.read_format & PERF_FORMAT_ID) { |
991 | if (perf_evlist__id_add_fd(evlist, evsel, cpu, thread, | |
992 | fd) < 0) | |
993 | return -1; | |
994 | perf_evlist__set_sid_idx(evlist, evsel, idx, cpu, | |
995 | thread); | |
996 | } | |
04e21314 AH |
997 | } |
998 | ||
999 | return 0; | |
1000 | } | |
1001 | ||
a8a8f3eb AH |
1002 | static int perf_evlist__mmap_per_cpu(struct perf_evlist *evlist, |
1003 | struct mmap_params *mp) | |
04e21314 | 1004 | { |
aece948f | 1005 | int cpu, thread; |
b3a319d5 NK |
1006 | int nr_cpus = cpu_map__nr(evlist->cpus); |
1007 | int nr_threads = thread_map__nr(evlist->threads); | |
aece948f | 1008 | |
e3e1a54f | 1009 | pr_debug2("perf event ring buffer mmapped per cpu\n"); |
b3a319d5 | 1010 | for (cpu = 0; cpu < nr_cpus; cpu++) { |
aece948f ACM |
1011 | int output = -1; |
1012 | ||
718c602d AH |
1013 | auxtrace_mmap_params__set_idx(&mp->auxtrace_mp, evlist, cpu, |
1014 | true); | |
1015 | ||
b3a319d5 | 1016 | for (thread = 0; thread < nr_threads; thread++) { |
a8a8f3eb AH |
1017 | if (perf_evlist__mmap_per_evsel(evlist, cpu, mp, cpu, |
1018 | thread, &output)) | |
04e21314 | 1019 | goto out_unmap; |
aece948f ACM |
1020 | } |
1021 | } | |
1022 | ||
1023 | return 0; | |
1024 | ||
1025 | out_unmap: | |
93edcbd9 AH |
1026 | for (cpu = 0; cpu < nr_cpus; cpu++) |
1027 | __perf_evlist__munmap(evlist, cpu); | |
aece948f ACM |
1028 | return -1; |
1029 | } | |
1030 | ||
a8a8f3eb AH |
1031 | static int perf_evlist__mmap_per_thread(struct perf_evlist *evlist, |
1032 | struct mmap_params *mp) | |
aece948f | 1033 | { |
aece948f | 1034 | int thread; |
b3a319d5 | 1035 | int nr_threads = thread_map__nr(evlist->threads); |
aece948f | 1036 | |
e3e1a54f | 1037 | pr_debug2("perf event ring buffer mmapped per thread\n"); |
b3a319d5 | 1038 | for (thread = 0; thread < nr_threads; thread++) { |
aece948f ACM |
1039 | int output = -1; |
1040 | ||
718c602d AH |
1041 | auxtrace_mmap_params__set_idx(&mp->auxtrace_mp, evlist, thread, |
1042 | false); | |
1043 | ||
a8a8f3eb AH |
1044 | if (perf_evlist__mmap_per_evsel(evlist, thread, mp, 0, thread, |
1045 | &output)) | |
04e21314 | 1046 | goto out_unmap; |
aece948f ACM |
1047 | } |
1048 | ||
1049 | return 0; | |
1050 | ||
1051 | out_unmap: | |
93edcbd9 AH |
1052 | for (thread = 0; thread < nr_threads; thread++) |
1053 | __perf_evlist__munmap(evlist, thread); | |
aece948f ACM |
1054 | return -1; |
1055 | } | |
1056 | ||
f5e7150c | 1057 | unsigned long perf_event_mlock_kb_in_pages(void) |
994a1f78 | 1058 | { |
f5e7150c ACM |
1059 | unsigned long pages; |
1060 | int max; | |
8185e881 | 1061 | |
f5e7150c ACM |
1062 | if (sysctl__read_int("kernel/perf_event_mlock_kb", &max) < 0) { |
1063 | /* | |
1064 | * Pick a once upon a time good value, i.e. things look | |
1065 | * strange since we can't read a sysctl value, but lets not | |
1066 | * die yet... | |
1067 | */ | |
1068 | max = 512; | |
1069 | } else { | |
1070 | max -= (page_size / 1024); | |
1071 | } | |
8185e881 | 1072 | |
f5e7150c ACM |
1073 | pages = (max * 1024) / page_size; |
1074 | if (!is_power_of_2(pages)) | |
1075 | pages = rounddown_pow_of_two(pages); | |
1076 | ||
1077 | return pages; | |
1078 | } | |
1079 | ||
1080 | static size_t perf_evlist__mmap_size(unsigned long pages) | |
1081 | { | |
1082 | if (pages == UINT_MAX) | |
1083 | pages = perf_event_mlock_kb_in_pages(); | |
1084 | else if (!is_power_of_2(pages)) | |
994a1f78 JO |
1085 | return 0; |
1086 | ||
1087 | return (pages + 1) * page_size; | |
1088 | } | |
1089 | ||
33c2dcfd DA |
1090 | static long parse_pages_arg(const char *str, unsigned long min, |
1091 | unsigned long max) | |
994a1f78 | 1092 | { |
2fbe4abe | 1093 | unsigned long pages, val; |
27050f53 JO |
1094 | static struct parse_tag tags[] = { |
1095 | { .tag = 'B', .mult = 1 }, | |
1096 | { .tag = 'K', .mult = 1 << 10 }, | |
1097 | { .tag = 'M', .mult = 1 << 20 }, | |
1098 | { .tag = 'G', .mult = 1 << 30 }, | |
1099 | { .tag = 0 }, | |
1100 | }; | |
994a1f78 | 1101 | |
8973504b | 1102 | if (str == NULL) |
33c2dcfd | 1103 | return -EINVAL; |
8973504b | 1104 | |
27050f53 | 1105 | val = parse_tag_value(str, tags); |
2fbe4abe | 1106 | if (val != (unsigned long) -1) { |
27050f53 JO |
1107 | /* we got file size value */ |
1108 | pages = PERF_ALIGN(val, page_size) / page_size; | |
27050f53 JO |
1109 | } else { |
1110 | /* we got pages count value */ | |
1111 | char *eptr; | |
1112 | pages = strtoul(str, &eptr, 10); | |
33c2dcfd DA |
1113 | if (*eptr != '\0') |
1114 | return -EINVAL; | |
994a1f78 JO |
1115 | } |
1116 | ||
2bcab6c1 | 1117 | if (pages == 0 && min == 0) { |
33c2dcfd | 1118 | /* leave number of pages at 0 */ |
1dbfa938 | 1119 | } else if (!is_power_of_2(pages)) { |
33c2dcfd | 1120 | /* round pages up to next power of 2 */ |
91529834 | 1121 | pages = roundup_pow_of_two(pages); |
1dbfa938 AH |
1122 | if (!pages) |
1123 | return -EINVAL; | |
9639837e DA |
1124 | pr_info("rounding mmap pages size to %lu bytes (%lu pages)\n", |
1125 | pages * page_size, pages); | |
2fbe4abe AH |
1126 | } |
1127 | ||
33c2dcfd DA |
1128 | if (pages > max) |
1129 | return -EINVAL; | |
1130 | ||
1131 | return pages; | |
1132 | } | |
1133 | ||
e9db1310 | 1134 | int __perf_evlist__parse_mmap_pages(unsigned int *mmap_pages, const char *str) |
33c2dcfd | 1135 | { |
33c2dcfd DA |
1136 | unsigned long max = UINT_MAX; |
1137 | long pages; | |
1138 | ||
f5ae9c42 | 1139 | if (max > SIZE_MAX / page_size) |
33c2dcfd DA |
1140 | max = SIZE_MAX / page_size; |
1141 | ||
1142 | pages = parse_pages_arg(str, 1, max); | |
1143 | if (pages < 0) { | |
1144 | pr_err("Invalid argument for --mmap_pages/-m\n"); | |
994a1f78 JO |
1145 | return -1; |
1146 | } | |
1147 | ||
1148 | *mmap_pages = pages; | |
1149 | return 0; | |
1150 | } | |
1151 | ||
e9db1310 AH |
1152 | int perf_evlist__parse_mmap_pages(const struct option *opt, const char *str, |
1153 | int unset __maybe_unused) | |
1154 | { | |
1155 | return __perf_evlist__parse_mmap_pages(opt->value, str); | |
1156 | } | |
1157 | ||
c83fa7f2 | 1158 | /** |
718c602d | 1159 | * perf_evlist__mmap_ex - Create mmaps to receive events. |
c83fa7f2 AH |
1160 | * @evlist: list of events |
1161 | * @pages: map length in pages | |
1162 | * @overwrite: overwrite older events? | |
718c602d AH |
1163 | * @auxtrace_pages - auxtrace map length in pages |
1164 | * @auxtrace_overwrite - overwrite older auxtrace data? | |
f8a95309 | 1165 | * |
c83fa7f2 AH |
1166 | * If @overwrite is %false the user needs to signal event consumption using |
1167 | * perf_mmap__write_tail(). Using perf_evlist__mmap_read() does this | |
1168 | * automatically. | |
7e2ed097 | 1169 | * |
718c602d AH |
1170 | * Similarly, if @auxtrace_overwrite is %false the user needs to signal data |
1171 | * consumption using auxtrace_mmap__write_tail(). | |
1172 | * | |
c83fa7f2 | 1173 | * Return: %0 on success, negative error code otherwise. |
f8a95309 | 1174 | */ |
718c602d AH |
1175 | int perf_evlist__mmap_ex(struct perf_evlist *evlist, unsigned int pages, |
1176 | bool overwrite, unsigned int auxtrace_pages, | |
1177 | bool auxtrace_overwrite) | |
f8a95309 | 1178 | { |
aece948f | 1179 | struct perf_evsel *evsel; |
7e2ed097 ACM |
1180 | const struct cpu_map *cpus = evlist->cpus; |
1181 | const struct thread_map *threads = evlist->threads; | |
a8a8f3eb AH |
1182 | struct mmap_params mp = { |
1183 | .prot = PROT_READ | (overwrite ? 0 : PROT_WRITE), | |
1184 | }; | |
50a682ce | 1185 | |
7e2ed097 | 1186 | if (evlist->mmap == NULL && perf_evlist__alloc_mmap(evlist) < 0) |
f8a95309 ACM |
1187 | return -ENOMEM; |
1188 | ||
1b85337d | 1189 | if (evlist->pollfd.entries == NULL && perf_evlist__alloc_pollfd(evlist) < 0) |
f8a95309 ACM |
1190 | return -ENOMEM; |
1191 | ||
1192 | evlist->overwrite = overwrite; | |
994a1f78 | 1193 | evlist->mmap_len = perf_evlist__mmap_size(pages); |
2af68ef5 | 1194 | pr_debug("mmap size %zuB\n", evlist->mmap_len); |
a8a8f3eb | 1195 | mp.mask = evlist->mmap_len - page_size - 1; |
f8a95309 | 1196 | |
718c602d AH |
1197 | auxtrace_mmap_params__init(&mp.auxtrace_mp, evlist->mmap_len, |
1198 | auxtrace_pages, auxtrace_overwrite); | |
1199 | ||
0050f7aa | 1200 | evlist__for_each(evlist, evsel) { |
f8a95309 | 1201 | if ((evsel->attr.read_format & PERF_FORMAT_ID) && |
a91e5431 | 1202 | evsel->sample_id == NULL && |
a14bb7a6 | 1203 | perf_evsel__alloc_id(evsel, cpu_map__nr(cpus), threads->nr) < 0) |
f8a95309 | 1204 | return -ENOMEM; |
f8a95309 ACM |
1205 | } |
1206 | ||
ec1e7e43 | 1207 | if (cpu_map__empty(cpus)) |
a8a8f3eb | 1208 | return perf_evlist__mmap_per_thread(evlist, &mp); |
f8a95309 | 1209 | |
a8a8f3eb | 1210 | return perf_evlist__mmap_per_cpu(evlist, &mp); |
f8a95309 | 1211 | } |
7e2ed097 | 1212 | |
718c602d AH |
1213 | int perf_evlist__mmap(struct perf_evlist *evlist, unsigned int pages, |
1214 | bool overwrite) | |
1215 | { | |
1216 | return perf_evlist__mmap_ex(evlist, pages, overwrite, 0, false); | |
1217 | } | |
1218 | ||
602ad878 | 1219 | int perf_evlist__create_maps(struct perf_evlist *evlist, struct target *target) |
7e2ed097 | 1220 | { |
74bfd2b2 AH |
1221 | struct cpu_map *cpus; |
1222 | struct thread_map *threads; | |
7e2ed097 | 1223 | |
74bfd2b2 | 1224 | threads = thread_map__new_str(target->pid, target->tid, target->uid); |
7e2ed097 | 1225 | |
74bfd2b2 | 1226 | if (!threads) |
7e2ed097 ACM |
1227 | return -1; |
1228 | ||
9c105fbc | 1229 | if (target__uses_dummy_map(target)) |
74bfd2b2 | 1230 | cpus = cpu_map__dummy_new(); |
879d77d0 | 1231 | else |
74bfd2b2 | 1232 | cpus = cpu_map__new(target->cpu_list); |
7e2ed097 | 1233 | |
74bfd2b2 | 1234 | if (!cpus) |
7e2ed097 ACM |
1235 | goto out_delete_threads; |
1236 | ||
ec9a77a7 AH |
1237 | evlist->has_user_cpus = !!target->cpu_list; |
1238 | ||
74bfd2b2 | 1239 | perf_evlist__set_maps(evlist, cpus, threads); |
d5bc056e AH |
1240 | |
1241 | return 0; | |
7e2ed097 ACM |
1242 | |
1243 | out_delete_threads: | |
74bfd2b2 | 1244 | thread_map__put(threads); |
7e2ed097 ACM |
1245 | return -1; |
1246 | } | |
1247 | ||
d5bc056e AH |
1248 | void perf_evlist__set_maps(struct perf_evlist *evlist, struct cpu_map *cpus, |
1249 | struct thread_map *threads) | |
3de5cfb0 | 1250 | { |
934e0f20 AH |
1251 | /* |
1252 | * Allow for the possibility that one or another of the maps isn't being | |
1253 | * changed i.e. don't put it. Note we are assuming the maps that are | |
1254 | * being applied are brand new and evlist is taking ownership of the | |
1255 | * original reference count of 1. If that is not the case it is up to | |
1256 | * the caller to increase the reference count. | |
1257 | */ | |
1258 | if (cpus != evlist->cpus) { | |
3de5cfb0 | 1259 | cpu_map__put(evlist->cpus); |
a55e5663 | 1260 | evlist->cpus = cpu_map__get(cpus); |
934e0f20 | 1261 | } |
3de5cfb0 | 1262 | |
934e0f20 | 1263 | if (threads != evlist->threads) { |
3de5cfb0 | 1264 | thread_map__put(evlist->threads); |
a55e5663 | 1265 | evlist->threads = thread_map__get(threads); |
934e0f20 | 1266 | } |
3de5cfb0 | 1267 | |
ec9a77a7 | 1268 | perf_evlist__propagate_maps(evlist); |
3de5cfb0 JO |
1269 | } |
1270 | ||
22c8a376 ACM |
1271 | void __perf_evlist__set_sample_bit(struct perf_evlist *evlist, |
1272 | enum perf_event_sample_format bit) | |
1273 | { | |
1274 | struct perf_evsel *evsel; | |
1275 | ||
1276 | evlist__for_each(evlist, evsel) | |
1277 | __perf_evsel__set_sample_bit(evsel, bit); | |
1278 | } | |
1279 | ||
1280 | void __perf_evlist__reset_sample_bit(struct perf_evlist *evlist, | |
1281 | enum perf_event_sample_format bit) | |
1282 | { | |
1283 | struct perf_evsel *evsel; | |
1284 | ||
1285 | evlist__for_each(evlist, evsel) | |
1286 | __perf_evsel__reset_sample_bit(evsel, bit); | |
1287 | } | |
1288 | ||
23d4aad4 | 1289 | int perf_evlist__apply_filters(struct perf_evlist *evlist, struct perf_evsel **err_evsel) |
0a102479 | 1290 | { |
0a102479 | 1291 | struct perf_evsel *evsel; |
745cefc5 ACM |
1292 | int err = 0; |
1293 | const int ncpus = cpu_map__nr(evlist->cpus), | |
b3a319d5 | 1294 | nthreads = thread_map__nr(evlist->threads); |
0a102479 | 1295 | |
0050f7aa | 1296 | evlist__for_each(evlist, evsel) { |
745cefc5 | 1297 | if (evsel->filter == NULL) |
0a102479 | 1298 | continue; |
745cefc5 | 1299 | |
d988d5ee KL |
1300 | /* |
1301 | * filters only work for tracepoint event, which doesn't have cpu limit. | |
1302 | * So evlist and evsel should always be same. | |
1303 | */ | |
f47805a2 | 1304 | err = perf_evsel__apply_filter(evsel, ncpus, nthreads, evsel->filter); |
23d4aad4 ACM |
1305 | if (err) { |
1306 | *err_evsel = evsel; | |
745cefc5 | 1307 | break; |
23d4aad4 | 1308 | } |
0a102479 FW |
1309 | } |
1310 | ||
745cefc5 ACM |
1311 | return err; |
1312 | } | |
1313 | ||
1314 | int perf_evlist__set_filter(struct perf_evlist *evlist, const char *filter) | |
1315 | { | |
1316 | struct perf_evsel *evsel; | |
1317 | int err = 0; | |
745cefc5 | 1318 | |
0050f7aa | 1319 | evlist__for_each(evlist, evsel) { |
fdf14720 WN |
1320 | if (evsel->attr.type != PERF_TYPE_TRACEPOINT) |
1321 | continue; | |
1322 | ||
94ad89bc | 1323 | err = perf_evsel__set_filter(evsel, filter); |
745cefc5 ACM |
1324 | if (err) |
1325 | break; | |
1326 | } | |
1327 | ||
1328 | return err; | |
0a102479 | 1329 | } |
74429964 | 1330 | |
be199ada | 1331 | int perf_evlist__set_filter_pids(struct perf_evlist *evlist, size_t npids, pid_t *pids) |
cfd70a26 ACM |
1332 | { |
1333 | char *filter; | |
be199ada ACM |
1334 | int ret = -1; |
1335 | size_t i; | |
cfd70a26 | 1336 | |
be199ada ACM |
1337 | for (i = 0; i < npids; ++i) { |
1338 | if (i == 0) { | |
1339 | if (asprintf(&filter, "common_pid != %d", pids[i]) < 0) | |
1340 | return -1; | |
1341 | } else { | |
1342 | char *tmp; | |
1343 | ||
1344 | if (asprintf(&tmp, "%s && common_pid != %d", filter, pids[i]) < 0) | |
1345 | goto out_free; | |
1346 | ||
1347 | free(filter); | |
1348 | filter = tmp; | |
1349 | } | |
1350 | } | |
cfd70a26 ACM |
1351 | |
1352 | ret = perf_evlist__set_filter(evlist, filter); | |
be199ada | 1353 | out_free: |
cfd70a26 ACM |
1354 | free(filter); |
1355 | return ret; | |
1356 | } | |
1357 | ||
be199ada ACM |
1358 | int perf_evlist__set_filter_pid(struct perf_evlist *evlist, pid_t pid) |
1359 | { | |
1360 | return perf_evlist__set_filter_pids(evlist, 1, &pid); | |
1361 | } | |
1362 | ||
0c21f736 | 1363 | bool perf_evlist__valid_sample_type(struct perf_evlist *evlist) |
74429964 | 1364 | { |
75562573 | 1365 | struct perf_evsel *pos; |
c2a70653 | 1366 | |
75562573 AH |
1367 | if (evlist->nr_entries == 1) |
1368 | return true; | |
1369 | ||
1370 | if (evlist->id_pos < 0 || evlist->is_pos < 0) | |
1371 | return false; | |
1372 | ||
0050f7aa | 1373 | evlist__for_each(evlist, pos) { |
75562573 AH |
1374 | if (pos->id_pos != evlist->id_pos || |
1375 | pos->is_pos != evlist->is_pos) | |
c2a70653 | 1376 | return false; |
74429964 FW |
1377 | } |
1378 | ||
c2a70653 | 1379 | return true; |
74429964 FW |
1380 | } |
1381 | ||
75562573 | 1382 | u64 __perf_evlist__combined_sample_type(struct perf_evlist *evlist) |
c2a70653 | 1383 | { |
75562573 AH |
1384 | struct perf_evsel *evsel; |
1385 | ||
1386 | if (evlist->combined_sample_type) | |
1387 | return evlist->combined_sample_type; | |
1388 | ||
0050f7aa | 1389 | evlist__for_each(evlist, evsel) |
75562573 AH |
1390 | evlist->combined_sample_type |= evsel->attr.sample_type; |
1391 | ||
1392 | return evlist->combined_sample_type; | |
1393 | } | |
1394 | ||
1395 | u64 perf_evlist__combined_sample_type(struct perf_evlist *evlist) | |
1396 | { | |
1397 | evlist->combined_sample_type = 0; | |
1398 | return __perf_evlist__combined_sample_type(evlist); | |
c2a70653 ACM |
1399 | } |
1400 | ||
98df858e AK |
1401 | u64 perf_evlist__combined_branch_type(struct perf_evlist *evlist) |
1402 | { | |
1403 | struct perf_evsel *evsel; | |
1404 | u64 branch_type = 0; | |
1405 | ||
1406 | evlist__for_each(evlist, evsel) | |
1407 | branch_type |= evsel->attr.branch_sample_type; | |
1408 | return branch_type; | |
1409 | } | |
1410 | ||
9ede473c JO |
1411 | bool perf_evlist__valid_read_format(struct perf_evlist *evlist) |
1412 | { | |
1413 | struct perf_evsel *first = perf_evlist__first(evlist), *pos = first; | |
1414 | u64 read_format = first->attr.read_format; | |
1415 | u64 sample_type = first->attr.sample_type; | |
1416 | ||
0050f7aa | 1417 | evlist__for_each(evlist, pos) { |
9ede473c JO |
1418 | if (read_format != pos->attr.read_format) |
1419 | return false; | |
1420 | } | |
1421 | ||
1422 | /* PERF_SAMPLE_READ imples PERF_FORMAT_ID. */ | |
1423 | if ((sample_type & PERF_SAMPLE_READ) && | |
1424 | !(read_format & PERF_FORMAT_ID)) { | |
1425 | return false; | |
1426 | } | |
1427 | ||
1428 | return true; | |
1429 | } | |
1430 | ||
1431 | u64 perf_evlist__read_format(struct perf_evlist *evlist) | |
1432 | { | |
1433 | struct perf_evsel *first = perf_evlist__first(evlist); | |
1434 | return first->attr.read_format; | |
1435 | } | |
1436 | ||
0c21f736 | 1437 | u16 perf_evlist__id_hdr_size(struct perf_evlist *evlist) |
81e36bff | 1438 | { |
0c21f736 | 1439 | struct perf_evsel *first = perf_evlist__first(evlist); |
81e36bff ACM |
1440 | struct perf_sample *data; |
1441 | u64 sample_type; | |
1442 | u16 size = 0; | |
1443 | ||
81e36bff ACM |
1444 | if (!first->attr.sample_id_all) |
1445 | goto out; | |
1446 | ||
1447 | sample_type = first->attr.sample_type; | |
1448 | ||
1449 | if (sample_type & PERF_SAMPLE_TID) | |
1450 | size += sizeof(data->tid) * 2; | |
1451 | ||
1452 | if (sample_type & PERF_SAMPLE_TIME) | |
1453 | size += sizeof(data->time); | |
1454 | ||
1455 | if (sample_type & PERF_SAMPLE_ID) | |
1456 | size += sizeof(data->id); | |
1457 | ||
1458 | if (sample_type & PERF_SAMPLE_STREAM_ID) | |
1459 | size += sizeof(data->stream_id); | |
1460 | ||
1461 | if (sample_type & PERF_SAMPLE_CPU) | |
1462 | size += sizeof(data->cpu) * 2; | |
75562573 AH |
1463 | |
1464 | if (sample_type & PERF_SAMPLE_IDENTIFIER) | |
1465 | size += sizeof(data->id); | |
81e36bff ACM |
1466 | out: |
1467 | return size; | |
1468 | } | |
1469 | ||
0c21f736 | 1470 | bool perf_evlist__valid_sample_id_all(struct perf_evlist *evlist) |
74429964 | 1471 | { |
0c21f736 | 1472 | struct perf_evsel *first = perf_evlist__first(evlist), *pos = first; |
c2a70653 | 1473 | |
0050f7aa | 1474 | evlist__for_each_continue(evlist, pos) { |
c2a70653 ACM |
1475 | if (first->attr.sample_id_all != pos->attr.sample_id_all) |
1476 | return false; | |
74429964 FW |
1477 | } |
1478 | ||
c2a70653 ACM |
1479 | return true; |
1480 | } | |
1481 | ||
0c21f736 | 1482 | bool perf_evlist__sample_id_all(struct perf_evlist *evlist) |
c2a70653 | 1483 | { |
0c21f736 | 1484 | struct perf_evsel *first = perf_evlist__first(evlist); |
c2a70653 | 1485 | return first->attr.sample_id_all; |
74429964 | 1486 | } |
81cce8de ACM |
1487 | |
1488 | void perf_evlist__set_selected(struct perf_evlist *evlist, | |
1489 | struct perf_evsel *evsel) | |
1490 | { | |
1491 | evlist->selected = evsel; | |
1492 | } | |
727ab04e | 1493 | |
a74b4b66 NK |
1494 | void perf_evlist__close(struct perf_evlist *evlist) |
1495 | { | |
1496 | struct perf_evsel *evsel; | |
1497 | int ncpus = cpu_map__nr(evlist->cpus); | |
1498 | int nthreads = thread_map__nr(evlist->threads); | |
8ad9219e | 1499 | int n; |
a74b4b66 | 1500 | |
8ad9219e SE |
1501 | evlist__for_each_reverse(evlist, evsel) { |
1502 | n = evsel->cpus ? evsel->cpus->nr : ncpus; | |
1503 | perf_evsel__close(evsel, n, nthreads); | |
1504 | } | |
a74b4b66 NK |
1505 | } |
1506 | ||
4112eb18 ACM |
1507 | static int perf_evlist__create_syswide_maps(struct perf_evlist *evlist) |
1508 | { | |
8c0498b6 AH |
1509 | struct cpu_map *cpus; |
1510 | struct thread_map *threads; | |
4112eb18 ACM |
1511 | int err = -ENOMEM; |
1512 | ||
1513 | /* | |
1514 | * Try reading /sys/devices/system/cpu/online to get | |
1515 | * an all cpus map. | |
1516 | * | |
1517 | * FIXME: -ENOMEM is the best we can do here, the cpu_map | |
1518 | * code needs an overhaul to properly forward the | |
1519 | * error, and we may not want to do that fallback to a | |
1520 | * default cpu identity map :-\ | |
1521 | */ | |
8c0498b6 AH |
1522 | cpus = cpu_map__new(NULL); |
1523 | if (!cpus) | |
4112eb18 ACM |
1524 | goto out; |
1525 | ||
8c0498b6 AH |
1526 | threads = thread_map__new_dummy(); |
1527 | if (!threads) | |
1528 | goto out_put; | |
4112eb18 | 1529 | |
8c0498b6 | 1530 | perf_evlist__set_maps(evlist, cpus, threads); |
4112eb18 ACM |
1531 | out: |
1532 | return err; | |
8c0498b6 AH |
1533 | out_put: |
1534 | cpu_map__put(cpus); | |
4112eb18 ACM |
1535 | goto out; |
1536 | } | |
1537 | ||
6a4bb04c | 1538 | int perf_evlist__open(struct perf_evlist *evlist) |
727ab04e | 1539 | { |
6a4bb04c | 1540 | struct perf_evsel *evsel; |
a74b4b66 | 1541 | int err; |
727ab04e | 1542 | |
4112eb18 ACM |
1543 | /* |
1544 | * Default: one fd per CPU, all threads, aka systemwide | |
1545 | * as sys_perf_event_open(cpu = -1, thread = -1) is EINVAL | |
1546 | */ | |
1547 | if (evlist->threads == NULL && evlist->cpus == NULL) { | |
1548 | err = perf_evlist__create_syswide_maps(evlist); | |
1549 | if (err < 0) | |
1550 | goto out_err; | |
1551 | } | |
1552 | ||
733cd2fe AH |
1553 | perf_evlist__update_id_pos(evlist); |
1554 | ||
0050f7aa | 1555 | evlist__for_each(evlist, evsel) { |
23df7f79 | 1556 | err = perf_evsel__open(evsel, evsel->cpus, evsel->threads); |
727ab04e ACM |
1557 | if (err < 0) |
1558 | goto out_err; | |
1559 | } | |
1560 | ||
1561 | return 0; | |
1562 | out_err: | |
a74b4b66 | 1563 | perf_evlist__close(evlist); |
41c21a68 | 1564 | errno = -err; |
727ab04e ACM |
1565 | return err; |
1566 | } | |
35b9d88e | 1567 | |
602ad878 | 1568 | int perf_evlist__prepare_workload(struct perf_evlist *evlist, struct target *target, |
55e162ea | 1569 | const char *argv[], bool pipe_output, |
735f7e0b | 1570 | void (*exec_error)(int signo, siginfo_t *info, void *ucontext)) |
35b9d88e ACM |
1571 | { |
1572 | int child_ready_pipe[2], go_pipe[2]; | |
1573 | char bf; | |
1574 | ||
1575 | if (pipe(child_ready_pipe) < 0) { | |
1576 | perror("failed to create 'ready' pipe"); | |
1577 | return -1; | |
1578 | } | |
1579 | ||
1580 | if (pipe(go_pipe) < 0) { | |
1581 | perror("failed to create 'go' pipe"); | |
1582 | goto out_close_ready_pipe; | |
1583 | } | |
1584 | ||
1585 | evlist->workload.pid = fork(); | |
1586 | if (evlist->workload.pid < 0) { | |
1587 | perror("failed to fork"); | |
1588 | goto out_close_pipes; | |
1589 | } | |
1590 | ||
1591 | if (!evlist->workload.pid) { | |
5f1c4225 ACM |
1592 | int ret; |
1593 | ||
119fa3c9 | 1594 | if (pipe_output) |
35b9d88e ACM |
1595 | dup2(2, 1); |
1596 | ||
0817df08 DA |
1597 | signal(SIGTERM, SIG_DFL); |
1598 | ||
35b9d88e ACM |
1599 | close(child_ready_pipe[0]); |
1600 | close(go_pipe[1]); | |
1601 | fcntl(go_pipe[0], F_SETFD, FD_CLOEXEC); | |
1602 | ||
35b9d88e ACM |
1603 | /* |
1604 | * Tell the parent we're ready to go | |
1605 | */ | |
1606 | close(child_ready_pipe[1]); | |
1607 | ||
1608 | /* | |
1609 | * Wait until the parent tells us to go. | |
1610 | */ | |
5f1c4225 ACM |
1611 | ret = read(go_pipe[0], &bf, 1); |
1612 | /* | |
1613 | * The parent will ask for the execvp() to be performed by | |
1614 | * writing exactly one byte, in workload.cork_fd, usually via | |
1615 | * perf_evlist__start_workload(). | |
1616 | * | |
20f86fc1 | 1617 | * For cancelling the workload without actually running it, |
5f1c4225 ACM |
1618 | * the parent will just close workload.cork_fd, without writing |
1619 | * anything, i.e. read will return zero and we just exit() | |
1620 | * here. | |
1621 | */ | |
1622 | if (ret != 1) { | |
1623 | if (ret == -1) | |
1624 | perror("unable to read pipe"); | |
1625 | exit(ret); | |
1626 | } | |
35b9d88e ACM |
1627 | |
1628 | execvp(argv[0], (char **)argv); | |
1629 | ||
735f7e0b | 1630 | if (exec_error) { |
f33cbe72 ACM |
1631 | union sigval val; |
1632 | ||
1633 | val.sival_int = errno; | |
1634 | if (sigqueue(getppid(), SIGUSR1, val)) | |
1635 | perror(argv[0]); | |
1636 | } else | |
1637 | perror(argv[0]); | |
35b9d88e ACM |
1638 | exit(-1); |
1639 | } | |
1640 | ||
735f7e0b ACM |
1641 | if (exec_error) { |
1642 | struct sigaction act = { | |
1643 | .sa_flags = SA_SIGINFO, | |
1644 | .sa_sigaction = exec_error, | |
1645 | }; | |
1646 | sigaction(SIGUSR1, &act, NULL); | |
1647 | } | |
1648 | ||
1aaf63b1 ACM |
1649 | if (target__none(target)) { |
1650 | if (evlist->threads == NULL) { | |
1651 | fprintf(stderr, "FATAL: evlist->threads need to be set at this point (%s:%d).\n", | |
1652 | __func__, __LINE__); | |
1653 | goto out_close_pipes; | |
1654 | } | |
e13798c7 | 1655 | thread_map__set_pid(evlist->threads, 0, evlist->workload.pid); |
1aaf63b1 | 1656 | } |
35b9d88e ACM |
1657 | |
1658 | close(child_ready_pipe[1]); | |
1659 | close(go_pipe[0]); | |
1660 | /* | |
1661 | * wait for child to settle | |
1662 | */ | |
1663 | if (read(child_ready_pipe[0], &bf, 1) == -1) { | |
1664 | perror("unable to read pipe"); | |
1665 | goto out_close_pipes; | |
1666 | } | |
1667 | ||
bcf3145f | 1668 | fcntl(go_pipe[1], F_SETFD, FD_CLOEXEC); |
35b9d88e ACM |
1669 | evlist->workload.cork_fd = go_pipe[1]; |
1670 | close(child_ready_pipe[0]); | |
1671 | return 0; | |
1672 | ||
1673 | out_close_pipes: | |
1674 | close(go_pipe[0]); | |
1675 | close(go_pipe[1]); | |
1676 | out_close_ready_pipe: | |
1677 | close(child_ready_pipe[0]); | |
1678 | close(child_ready_pipe[1]); | |
1679 | return -1; | |
1680 | } | |
1681 | ||
1682 | int perf_evlist__start_workload(struct perf_evlist *evlist) | |
1683 | { | |
1684 | if (evlist->workload.cork_fd > 0) { | |
b3824404 | 1685 | char bf = 0; |
bcf3145f | 1686 | int ret; |
35b9d88e ACM |
1687 | /* |
1688 | * Remove the cork, let it rip! | |
1689 | */ | |
bcf3145f NK |
1690 | ret = write(evlist->workload.cork_fd, &bf, 1); |
1691 | if (ret < 0) | |
1692 | perror("enable to write to pipe"); | |
1693 | ||
1694 | close(evlist->workload.cork_fd); | |
1695 | return ret; | |
35b9d88e ACM |
1696 | } |
1697 | ||
1698 | return 0; | |
1699 | } | |
cb0b29e0 | 1700 | |
a3f698fe | 1701 | int perf_evlist__parse_sample(struct perf_evlist *evlist, union perf_event *event, |
0807d2d8 | 1702 | struct perf_sample *sample) |
cb0b29e0 | 1703 | { |
75562573 AH |
1704 | struct perf_evsel *evsel = perf_evlist__event2evsel(evlist, event); |
1705 | ||
1706 | if (!evsel) | |
1707 | return -EFAULT; | |
0807d2d8 | 1708 | return perf_evsel__parse_sample(evsel, event, sample); |
cb0b29e0 | 1709 | } |
78f067b3 ACM |
1710 | |
1711 | size_t perf_evlist__fprintf(struct perf_evlist *evlist, FILE *fp) | |
1712 | { | |
1713 | struct perf_evsel *evsel; | |
1714 | size_t printed = 0; | |
1715 | ||
0050f7aa | 1716 | evlist__for_each(evlist, evsel) { |
78f067b3 ACM |
1717 | printed += fprintf(fp, "%s%s", evsel->idx ? ", " : "", |
1718 | perf_evsel__name(evsel)); | |
1719 | } | |
1720 | ||
b2222139 | 1721 | return printed + fprintf(fp, "\n"); |
78f067b3 | 1722 | } |
6ef068cb | 1723 | |
d9aade7f | 1724 | int perf_evlist__strerror_open(struct perf_evlist *evlist, |
a8f23d8f ACM |
1725 | int err, char *buf, size_t size) |
1726 | { | |
1727 | int printed, value; | |
6e81c74c | 1728 | char sbuf[STRERR_BUFSIZE], *emsg = strerror_r(err, sbuf, sizeof(sbuf)); |
a8f23d8f ACM |
1729 | |
1730 | switch (err) { | |
1731 | case EACCES: | |
1732 | case EPERM: | |
1733 | printed = scnprintf(buf, size, | |
1734 | "Error:\t%s.\n" | |
1735 | "Hint:\tCheck /proc/sys/kernel/perf_event_paranoid setting.", emsg); | |
1736 | ||
1a47245d | 1737 | value = perf_event_paranoid(); |
a8f23d8f ACM |
1738 | |
1739 | printed += scnprintf(buf + printed, size - printed, "\nHint:\t"); | |
1740 | ||
1741 | if (value >= 2) { | |
1742 | printed += scnprintf(buf + printed, size - printed, | |
1743 | "For your workloads it needs to be <= 1\nHint:\t"); | |
1744 | } | |
1745 | printed += scnprintf(buf + printed, size - printed, | |
5229e366 | 1746 | "For system wide tracing it needs to be set to -1.\n"); |
a8f23d8f ACM |
1747 | |
1748 | printed += scnprintf(buf + printed, size - printed, | |
5229e366 ACM |
1749 | "Hint:\tTry: 'sudo sh -c \"echo -1 > /proc/sys/kernel/perf_event_paranoid\"'\n" |
1750 | "Hint:\tThe current value is %d.", value); | |
a8f23d8f | 1751 | break; |
d9aade7f ACM |
1752 | case EINVAL: { |
1753 | struct perf_evsel *first = perf_evlist__first(evlist); | |
1754 | int max_freq; | |
1755 | ||
1756 | if (sysctl__read_int("kernel/perf_event_max_sample_rate", &max_freq) < 0) | |
1757 | goto out_default; | |
1758 | ||
1759 | if (first->attr.sample_freq < (u64)max_freq) | |
1760 | goto out_default; | |
1761 | ||
1762 | printed = scnprintf(buf, size, | |
1763 | "Error:\t%s.\n" | |
1764 | "Hint:\tCheck /proc/sys/kernel/perf_event_max_sample_rate.\n" | |
1765 | "Hint:\tThe current value is %d and %" PRIu64 " is being requested.", | |
1766 | emsg, max_freq, first->attr.sample_freq); | |
1767 | break; | |
1768 | } | |
a8f23d8f | 1769 | default: |
d9aade7f | 1770 | out_default: |
a8f23d8f ACM |
1771 | scnprintf(buf, size, "%s", emsg); |
1772 | break; | |
1773 | } | |
1774 | ||
1775 | return 0; | |
1776 | } | |
a025e4f0 | 1777 | |
956fa571 ACM |
1778 | int perf_evlist__strerror_mmap(struct perf_evlist *evlist, int err, char *buf, size_t size) |
1779 | { | |
1780 | char sbuf[STRERR_BUFSIZE], *emsg = strerror_r(err, sbuf, sizeof(sbuf)); | |
e965bea1 | 1781 | int pages_attempted = evlist->mmap_len / 1024, pages_max_per_user, printed = 0; |
956fa571 ACM |
1782 | |
1783 | switch (err) { | |
1784 | case EPERM: | |
e5d4a290 | 1785 | sysctl__read_int("kernel/perf_event_mlock_kb", &pages_max_per_user); |
e965bea1 ACM |
1786 | printed += scnprintf(buf + printed, size - printed, |
1787 | "Error:\t%s.\n" | |
956fa571 | 1788 | "Hint:\tCheck /proc/sys/kernel/perf_event_mlock_kb (%d kB) setting.\n" |
e965bea1 | 1789 | "Hint:\tTried using %zd kB.\n", |
e5d4a290 | 1790 | emsg, pages_max_per_user, pages_attempted); |
e965bea1 ACM |
1791 | |
1792 | if (pages_attempted >= pages_max_per_user) { | |
1793 | printed += scnprintf(buf + printed, size - printed, | |
1794 | "Hint:\tTry 'sudo sh -c \"echo %d > /proc/sys/kernel/perf_event_mlock_kb\"', or\n", | |
1795 | pages_max_per_user + pages_attempted); | |
1796 | } | |
1797 | ||
1798 | printed += scnprintf(buf + printed, size - printed, | |
1799 | "Hint:\tTry using a smaller -m/--mmap-pages value."); | |
956fa571 ACM |
1800 | break; |
1801 | default: | |
1802 | scnprintf(buf, size, "%s", emsg); | |
1803 | break; | |
1804 | } | |
1805 | ||
1806 | return 0; | |
1807 | } | |
1808 | ||
a025e4f0 AH |
1809 | void perf_evlist__to_front(struct perf_evlist *evlist, |
1810 | struct perf_evsel *move_evsel) | |
1811 | { | |
1812 | struct perf_evsel *evsel, *n; | |
1813 | LIST_HEAD(move); | |
1814 | ||
1815 | if (move_evsel == perf_evlist__first(evlist)) | |
1816 | return; | |
1817 | ||
0050f7aa | 1818 | evlist__for_each_safe(evlist, n, evsel) { |
a025e4f0 AH |
1819 | if (evsel->leader == move_evsel->leader) |
1820 | list_move_tail(&evsel->node, &move); | |
1821 | } | |
1822 | ||
1823 | list_splice(&move, &evlist->entries); | |
1824 | } | |
60b0896c AH |
1825 | |
1826 | void perf_evlist__set_tracking_event(struct perf_evlist *evlist, | |
1827 | struct perf_evsel *tracking_evsel) | |
1828 | { | |
1829 | struct perf_evsel *evsel; | |
1830 | ||
1831 | if (tracking_evsel->tracking) | |
1832 | return; | |
1833 | ||
1834 | evlist__for_each(evlist, evsel) { | |
1835 | if (evsel != tracking_evsel) | |
1836 | evsel->tracking = false; | |
1837 | } | |
1838 | ||
1839 | tracking_evsel->tracking = true; | |
1840 | } | |
7630b3e2 WN |
1841 | |
1842 | struct perf_evsel * | |
1843 | perf_evlist__find_evsel_by_str(struct perf_evlist *evlist, | |
1844 | const char *str) | |
1845 | { | |
1846 | struct perf_evsel *evsel; | |
1847 | ||
1848 | evlist__for_each(evlist, evsel) { | |
1849 | if (!evsel->name) | |
1850 | continue; | |
1851 | if (strcmp(str, evsel->name) == 0) | |
1852 | return evsel; | |
1853 | } | |
1854 | ||
1855 | return NULL; | |
1856 | } |