]>
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" |
994a1f78 | 21 | #include "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> |
70db7533 | 28 | |
e4b356b5 ACM |
29 | static void perf_evlist__mmap_put(struct perf_evlist *evlist, int idx); |
30 | static void __perf_evlist__munmap(struct perf_evlist *evlist, int idx); | |
31 | ||
f8a95309 | 32 | #define FD(e, x, y) (*(int *)xyarray__entry(e->fd, x, y)) |
a91e5431 | 33 | #define SID(e, x, y) xyarray__entry(e->sample_id, x, y) |
f8a95309 | 34 | |
7e2ed097 ACM |
35 | void perf_evlist__init(struct perf_evlist *evlist, struct cpu_map *cpus, |
36 | struct thread_map *threads) | |
ef1d1af2 ACM |
37 | { |
38 | int i; | |
39 | ||
40 | for (i = 0; i < PERF_EVLIST__HLIST_SIZE; ++i) | |
41 | INIT_HLIST_HEAD(&evlist->heads[i]); | |
42 | INIT_LIST_HEAD(&evlist->entries); | |
7e2ed097 | 43 | perf_evlist__set_maps(evlist, cpus, threads); |
1b85337d | 44 | fdarray__init(&evlist->pollfd, 64); |
35b9d88e | 45 | evlist->workload.pid = -1; |
ef1d1af2 ACM |
46 | } |
47 | ||
334fe7a3 | 48 | struct perf_evlist *perf_evlist__new(void) |
361c99a6 ACM |
49 | { |
50 | struct perf_evlist *evlist = zalloc(sizeof(*evlist)); | |
51 | ||
ef1d1af2 | 52 | if (evlist != NULL) |
334fe7a3 | 53 | perf_evlist__init(evlist, NULL, NULL); |
361c99a6 ACM |
54 | |
55 | return evlist; | |
56 | } | |
57 | ||
b22d54b0 JO |
58 | struct perf_evlist *perf_evlist__new_default(void) |
59 | { | |
60 | struct perf_evlist *evlist = perf_evlist__new(); | |
61 | ||
62 | if (evlist && perf_evlist__add_default(evlist)) { | |
63 | perf_evlist__delete(evlist); | |
64 | evlist = NULL; | |
65 | } | |
66 | ||
67 | return evlist; | |
68 | } | |
69 | ||
75562573 AH |
70 | /** |
71 | * perf_evlist__set_id_pos - set the positions of event ids. | |
72 | * @evlist: selected event list | |
73 | * | |
74 | * Events with compatible sample types all have the same id_pos | |
75 | * and is_pos. For convenience, put a copy on evlist. | |
76 | */ | |
77 | void perf_evlist__set_id_pos(struct perf_evlist *evlist) | |
78 | { | |
79 | struct perf_evsel *first = perf_evlist__first(evlist); | |
80 | ||
81 | evlist->id_pos = first->id_pos; | |
82 | evlist->is_pos = first->is_pos; | |
83 | } | |
84 | ||
733cd2fe AH |
85 | static void perf_evlist__update_id_pos(struct perf_evlist *evlist) |
86 | { | |
87 | struct perf_evsel *evsel; | |
88 | ||
0050f7aa | 89 | evlist__for_each(evlist, evsel) |
733cd2fe AH |
90 | perf_evsel__calc_id_pos(evsel); |
91 | ||
92 | perf_evlist__set_id_pos(evlist); | |
93 | } | |
94 | ||
361c99a6 ACM |
95 | static void perf_evlist__purge(struct perf_evlist *evlist) |
96 | { | |
97 | struct perf_evsel *pos, *n; | |
98 | ||
0050f7aa | 99 | evlist__for_each_safe(evlist, n, pos) { |
361c99a6 | 100 | list_del_init(&pos->node); |
d49e4695 | 101 | pos->evlist = NULL; |
361c99a6 ACM |
102 | perf_evsel__delete(pos); |
103 | } | |
104 | ||
105 | evlist->nr_entries = 0; | |
106 | } | |
107 | ||
ef1d1af2 | 108 | void perf_evlist__exit(struct perf_evlist *evlist) |
361c99a6 | 109 | { |
04662523 | 110 | zfree(&evlist->mmap); |
1b85337d | 111 | fdarray__exit(&evlist->pollfd); |
ef1d1af2 ACM |
112 | } |
113 | ||
114 | void perf_evlist__delete(struct perf_evlist *evlist) | |
115 | { | |
983874d1 | 116 | perf_evlist__munmap(evlist); |
f26e1c7c | 117 | perf_evlist__close(evlist); |
f30a79b0 | 118 | cpu_map__put(evlist->cpus); |
186fbb74 | 119 | thread_map__put(evlist->threads); |
03ad9747 ACM |
120 | evlist->cpus = NULL; |
121 | evlist->threads = NULL; | |
ef1d1af2 ACM |
122 | perf_evlist__purge(evlist); |
123 | perf_evlist__exit(evlist); | |
361c99a6 ACM |
124 | free(evlist); |
125 | } | |
126 | ||
127 | void perf_evlist__add(struct perf_evlist *evlist, struct perf_evsel *entry) | |
128 | { | |
d49e4695 | 129 | entry->evlist = evlist; |
361c99a6 | 130 | list_add_tail(&entry->node, &evlist->entries); |
ef503831 | 131 | entry->idx = evlist->nr_entries; |
60b0896c | 132 | entry->tracking = !entry->idx; |
ef503831 | 133 | |
75562573 AH |
134 | if (!evlist->nr_entries++) |
135 | perf_evlist__set_id_pos(evlist); | |
361c99a6 ACM |
136 | } |
137 | ||
0529bc1f JO |
138 | void perf_evlist__splice_list_tail(struct perf_evlist *evlist, |
139 | struct list_head *list, | |
140 | int nr_entries) | |
50d08e47 | 141 | { |
75562573 AH |
142 | bool set_id_pos = !evlist->nr_entries; |
143 | ||
50d08e47 ACM |
144 | list_splice_tail(list, &evlist->entries); |
145 | evlist->nr_entries += nr_entries; | |
75562573 AH |
146 | if (set_id_pos) |
147 | perf_evlist__set_id_pos(evlist); | |
50d08e47 ACM |
148 | } |
149 | ||
63dab225 ACM |
150 | void __perf_evlist__set_leader(struct list_head *list) |
151 | { | |
152 | struct perf_evsel *evsel, *leader; | |
153 | ||
154 | leader = list_entry(list->next, struct perf_evsel, node); | |
97f63e4a NK |
155 | evsel = list_entry(list->prev, struct perf_evsel, node); |
156 | ||
157 | leader->nr_members = evsel->idx - leader->idx + 1; | |
63dab225 | 158 | |
0050f7aa | 159 | __evlist__for_each(list, evsel) { |
74b2133d | 160 | evsel->leader = leader; |
63dab225 ACM |
161 | } |
162 | } | |
163 | ||
164 | void perf_evlist__set_leader(struct perf_evlist *evlist) | |
6a4bb04c | 165 | { |
97f63e4a NK |
166 | if (evlist->nr_entries) { |
167 | evlist->nr_groups = evlist->nr_entries > 1 ? 1 : 0; | |
63dab225 | 168 | __perf_evlist__set_leader(&evlist->entries); |
97f63e4a | 169 | } |
6a4bb04c JO |
170 | } |
171 | ||
361c99a6 ACM |
172 | int perf_evlist__add_default(struct perf_evlist *evlist) |
173 | { | |
174 | struct perf_event_attr attr = { | |
175 | .type = PERF_TYPE_HARDWARE, | |
176 | .config = PERF_COUNT_HW_CPU_CYCLES, | |
177 | }; | |
1aed2671 JR |
178 | struct perf_evsel *evsel; |
179 | ||
180 | event_attr_init(&attr); | |
361c99a6 | 181 | |
ef503831 | 182 | evsel = perf_evsel__new(&attr); |
361c99a6 | 183 | if (evsel == NULL) |
cc2d86b0 SE |
184 | goto error; |
185 | ||
186 | /* use strdup() because free(evsel) assumes name is allocated */ | |
187 | evsel->name = strdup("cycles"); | |
188 | if (!evsel->name) | |
189 | goto error_free; | |
361c99a6 ACM |
190 | |
191 | perf_evlist__add(evlist, evsel); | |
192 | return 0; | |
cc2d86b0 SE |
193 | error_free: |
194 | perf_evsel__delete(evsel); | |
195 | error: | |
196 | return -ENOMEM; | |
361c99a6 | 197 | } |
5c581041 | 198 | |
e60fc847 ACM |
199 | static int perf_evlist__add_attrs(struct perf_evlist *evlist, |
200 | struct perf_event_attr *attrs, size_t nr_attrs) | |
50d08e47 ACM |
201 | { |
202 | struct perf_evsel *evsel, *n; | |
203 | LIST_HEAD(head); | |
204 | size_t i; | |
205 | ||
206 | for (i = 0; i < nr_attrs; i++) { | |
ef503831 | 207 | evsel = perf_evsel__new_idx(attrs + i, evlist->nr_entries + i); |
50d08e47 ACM |
208 | if (evsel == NULL) |
209 | goto out_delete_partial_list; | |
210 | list_add_tail(&evsel->node, &head); | |
211 | } | |
212 | ||
213 | perf_evlist__splice_list_tail(evlist, &head, nr_attrs); | |
214 | ||
215 | return 0; | |
216 | ||
217 | out_delete_partial_list: | |
0050f7aa | 218 | __evlist__for_each_safe(&head, n, evsel) |
50d08e47 ACM |
219 | perf_evsel__delete(evsel); |
220 | return -1; | |
221 | } | |
222 | ||
79695e1b ACM |
223 | int __perf_evlist__add_default_attrs(struct perf_evlist *evlist, |
224 | struct perf_event_attr *attrs, size_t nr_attrs) | |
225 | { | |
226 | size_t i; | |
227 | ||
228 | for (i = 0; i < nr_attrs; i++) | |
229 | event_attr_init(attrs + i); | |
230 | ||
231 | return perf_evlist__add_attrs(evlist, attrs, nr_attrs); | |
232 | } | |
233 | ||
da378962 ACM |
234 | struct perf_evsel * |
235 | perf_evlist__find_tracepoint_by_id(struct perf_evlist *evlist, int id) | |
ee29be62 ACM |
236 | { |
237 | struct perf_evsel *evsel; | |
238 | ||
0050f7aa | 239 | evlist__for_each(evlist, evsel) { |
ee29be62 ACM |
240 | if (evsel->attr.type == PERF_TYPE_TRACEPOINT && |
241 | (int)evsel->attr.config == id) | |
242 | return evsel; | |
243 | } | |
244 | ||
245 | return NULL; | |
246 | } | |
247 | ||
a2f2804a DA |
248 | struct perf_evsel * |
249 | perf_evlist__find_tracepoint_by_name(struct perf_evlist *evlist, | |
250 | const char *name) | |
251 | { | |
252 | struct perf_evsel *evsel; | |
253 | ||
0050f7aa | 254 | evlist__for_each(evlist, evsel) { |
a2f2804a DA |
255 | if ((evsel->attr.type == PERF_TYPE_TRACEPOINT) && |
256 | (strcmp(evsel->name, name) == 0)) | |
257 | return evsel; | |
258 | } | |
259 | ||
260 | return NULL; | |
261 | } | |
262 | ||
39876e7d ACM |
263 | int perf_evlist__add_newtp(struct perf_evlist *evlist, |
264 | const char *sys, const char *name, void *handler) | |
265 | { | |
ef503831 | 266 | struct perf_evsel *evsel = perf_evsel__newtp(sys, name); |
39876e7d | 267 | |
39876e7d ACM |
268 | if (evsel == NULL) |
269 | return -1; | |
270 | ||
744a9719 | 271 | evsel->handler = handler; |
39876e7d ACM |
272 | perf_evlist__add(evlist, evsel); |
273 | return 0; | |
274 | } | |
275 | ||
bf8e8f4b AH |
276 | static int perf_evlist__nr_threads(struct perf_evlist *evlist, |
277 | struct perf_evsel *evsel) | |
278 | { | |
279 | if (evsel->system_wide) | |
280 | return 1; | |
281 | else | |
282 | return thread_map__nr(evlist->threads); | |
283 | } | |
284 | ||
4152ab37 ACM |
285 | void perf_evlist__disable(struct perf_evlist *evlist) |
286 | { | |
287 | int cpu, thread; | |
288 | struct perf_evsel *pos; | |
b3a319d5 | 289 | int nr_cpus = cpu_map__nr(evlist->cpus); |
bf8e8f4b | 290 | int nr_threads; |
4152ab37 | 291 | |
b3a319d5 | 292 | for (cpu = 0; cpu < nr_cpus; cpu++) { |
0050f7aa | 293 | evlist__for_each(evlist, pos) { |
395c3070 | 294 | if (!perf_evsel__is_group_leader(pos) || !pos->fd) |
3fe4430d | 295 | continue; |
bf8e8f4b | 296 | nr_threads = perf_evlist__nr_threads(evlist, pos); |
b3a319d5 | 297 | for (thread = 0; thread < nr_threads; thread++) |
55da8005 NK |
298 | ioctl(FD(pos, cpu, thread), |
299 | PERF_EVENT_IOC_DISABLE, 0); | |
4152ab37 ACM |
300 | } |
301 | } | |
2b56bcfb ACM |
302 | |
303 | evlist->enabled = false; | |
4152ab37 ACM |
304 | } |
305 | ||
764e16a3 DA |
306 | void perf_evlist__enable(struct perf_evlist *evlist) |
307 | { | |
308 | int cpu, thread; | |
309 | struct perf_evsel *pos; | |
b3a319d5 | 310 | int nr_cpus = cpu_map__nr(evlist->cpus); |
bf8e8f4b | 311 | int nr_threads; |
764e16a3 | 312 | |
b3a319d5 | 313 | for (cpu = 0; cpu < nr_cpus; cpu++) { |
0050f7aa | 314 | evlist__for_each(evlist, pos) { |
395c3070 | 315 | if (!perf_evsel__is_group_leader(pos) || !pos->fd) |
3fe4430d | 316 | continue; |
bf8e8f4b | 317 | nr_threads = perf_evlist__nr_threads(evlist, pos); |
b3a319d5 | 318 | for (thread = 0; thread < nr_threads; thread++) |
55da8005 NK |
319 | ioctl(FD(pos, cpu, thread), |
320 | PERF_EVENT_IOC_ENABLE, 0); | |
764e16a3 DA |
321 | } |
322 | } | |
2b56bcfb ACM |
323 | |
324 | evlist->enabled = true; | |
325 | } | |
326 | ||
327 | void perf_evlist__toggle_enable(struct perf_evlist *evlist) | |
328 | { | |
329 | (evlist->enabled ? perf_evlist__disable : perf_evlist__enable)(evlist); | |
764e16a3 DA |
330 | } |
331 | ||
395c3070 AH |
332 | int perf_evlist__disable_event(struct perf_evlist *evlist, |
333 | struct perf_evsel *evsel) | |
334 | { | |
335 | int cpu, thread, err; | |
bf8e8f4b AH |
336 | int nr_cpus = cpu_map__nr(evlist->cpus); |
337 | int nr_threads = perf_evlist__nr_threads(evlist, evsel); | |
395c3070 AH |
338 | |
339 | if (!evsel->fd) | |
340 | return 0; | |
341 | ||
bf8e8f4b AH |
342 | for (cpu = 0; cpu < nr_cpus; cpu++) { |
343 | for (thread = 0; thread < nr_threads; thread++) { | |
395c3070 AH |
344 | err = ioctl(FD(evsel, cpu, thread), |
345 | PERF_EVENT_IOC_DISABLE, 0); | |
346 | if (err) | |
347 | return err; | |
348 | } | |
349 | } | |
350 | return 0; | |
351 | } | |
352 | ||
353 | int perf_evlist__enable_event(struct perf_evlist *evlist, | |
354 | struct perf_evsel *evsel) | |
355 | { | |
356 | int cpu, thread, err; | |
bf8e8f4b AH |
357 | int nr_cpus = cpu_map__nr(evlist->cpus); |
358 | int nr_threads = perf_evlist__nr_threads(evlist, evsel); | |
395c3070 AH |
359 | |
360 | if (!evsel->fd) | |
361 | return -EINVAL; | |
362 | ||
bf8e8f4b AH |
363 | for (cpu = 0; cpu < nr_cpus; cpu++) { |
364 | for (thread = 0; thread < nr_threads; thread++) { | |
395c3070 AH |
365 | err = ioctl(FD(evsel, cpu, thread), |
366 | PERF_EVENT_IOC_ENABLE, 0); | |
367 | if (err) | |
368 | return err; | |
369 | } | |
370 | } | |
371 | return 0; | |
372 | } | |
373 | ||
1c65056c AH |
374 | static int perf_evlist__enable_event_cpu(struct perf_evlist *evlist, |
375 | struct perf_evsel *evsel, int cpu) | |
376 | { | |
377 | int thread, err; | |
378 | int nr_threads = perf_evlist__nr_threads(evlist, evsel); | |
379 | ||
380 | if (!evsel->fd) | |
381 | return -EINVAL; | |
382 | ||
383 | for (thread = 0; thread < nr_threads; thread++) { | |
384 | err = ioctl(FD(evsel, cpu, thread), | |
385 | PERF_EVENT_IOC_ENABLE, 0); | |
386 | if (err) | |
387 | return err; | |
388 | } | |
389 | return 0; | |
390 | } | |
391 | ||
392 | static int perf_evlist__enable_event_thread(struct perf_evlist *evlist, | |
393 | struct perf_evsel *evsel, | |
394 | int thread) | |
395 | { | |
396 | int cpu, err; | |
397 | int nr_cpus = cpu_map__nr(evlist->cpus); | |
398 | ||
399 | if (!evsel->fd) | |
400 | return -EINVAL; | |
401 | ||
402 | for (cpu = 0; cpu < nr_cpus; cpu++) { | |
403 | err = ioctl(FD(evsel, cpu, thread), PERF_EVENT_IOC_ENABLE, 0); | |
404 | if (err) | |
405 | return err; | |
406 | } | |
407 | return 0; | |
408 | } | |
409 | ||
410 | int perf_evlist__enable_event_idx(struct perf_evlist *evlist, | |
411 | struct perf_evsel *evsel, int idx) | |
412 | { | |
413 | bool per_cpu_mmaps = !cpu_map__empty(evlist->cpus); | |
414 | ||
415 | if (per_cpu_mmaps) | |
416 | return perf_evlist__enable_event_cpu(evlist, evsel, idx); | |
417 | else | |
418 | return perf_evlist__enable_event_thread(evlist, evsel, idx); | |
419 | } | |
420 | ||
ad6765dd | 421 | int perf_evlist__alloc_pollfd(struct perf_evlist *evlist) |
5c581041 | 422 | { |
b3a319d5 NK |
423 | int nr_cpus = cpu_map__nr(evlist->cpus); |
424 | int nr_threads = thread_map__nr(evlist->threads); | |
bf8e8f4b AH |
425 | int nfds = 0; |
426 | struct perf_evsel *evsel; | |
427 | ||
cba9b847 | 428 | evlist__for_each(evlist, evsel) { |
bf8e8f4b AH |
429 | if (evsel->system_wide) |
430 | nfds += nr_cpus; | |
431 | else | |
432 | nfds += nr_cpus * nr_threads; | |
433 | } | |
434 | ||
1b85337d ACM |
435 | if (fdarray__available_entries(&evlist->pollfd) < nfds && |
436 | fdarray__grow(&evlist->pollfd, nfds) < 0) | |
ad6765dd ACM |
437 | return -ENOMEM; |
438 | ||
439 | return 0; | |
5c581041 | 440 | } |
70082dd9 | 441 | |
e4b356b5 ACM |
442 | static int __perf_evlist__add_pollfd(struct perf_evlist *evlist, int fd, int idx) |
443 | { | |
444 | int pos = fdarray__add(&evlist->pollfd, fd, POLLIN | POLLERR | POLLHUP); | |
445 | /* | |
446 | * Save the idx so that when we filter out fds POLLHUP'ed we can | |
447 | * close the associated evlist->mmap[] entry. | |
448 | */ | |
449 | if (pos >= 0) { | |
450 | evlist->pollfd.priv[pos].idx = idx; | |
451 | ||
452 | fcntl(fd, F_SETFL, O_NONBLOCK); | |
453 | } | |
454 | ||
455 | return pos; | |
456 | } | |
457 | ||
ad6765dd | 458 | int perf_evlist__add_pollfd(struct perf_evlist *evlist, int fd) |
70082dd9 | 459 | { |
e4b356b5 ACM |
460 | return __perf_evlist__add_pollfd(evlist, fd, -1); |
461 | } | |
462 | ||
463 | static void perf_evlist__munmap_filtered(struct fdarray *fda, int fd) | |
464 | { | |
465 | struct perf_evlist *evlist = container_of(fda, struct perf_evlist, pollfd); | |
1b85337d | 466 | |
e4b356b5 | 467 | perf_evlist__mmap_put(evlist, fda->priv[fd].idx); |
70082dd9 | 468 | } |
70db7533 | 469 | |
1ddec7f0 ACM |
470 | int perf_evlist__filter_pollfd(struct perf_evlist *evlist, short revents_and_mask) |
471 | { | |
e4b356b5 ACM |
472 | return fdarray__filter(&evlist->pollfd, revents_and_mask, |
473 | perf_evlist__munmap_filtered); | |
1ddec7f0 ACM |
474 | } |
475 | ||
f66a889d ACM |
476 | int perf_evlist__poll(struct perf_evlist *evlist, int timeout) |
477 | { | |
1b85337d | 478 | return fdarray__poll(&evlist->pollfd, timeout); |
f66a889d ACM |
479 | } |
480 | ||
a91e5431 ACM |
481 | static void perf_evlist__id_hash(struct perf_evlist *evlist, |
482 | struct perf_evsel *evsel, | |
483 | int cpu, int thread, u64 id) | |
3d3b5e95 ACM |
484 | { |
485 | int hash; | |
486 | struct perf_sample_id *sid = SID(evsel, cpu, thread); | |
487 | ||
488 | sid->id = id; | |
489 | sid->evsel = evsel; | |
490 | hash = hash_64(sid->id, PERF_EVLIST__HLIST_BITS); | |
491 | hlist_add_head(&sid->node, &evlist->heads[hash]); | |
492 | } | |
493 | ||
a91e5431 ACM |
494 | void perf_evlist__id_add(struct perf_evlist *evlist, struct perf_evsel *evsel, |
495 | int cpu, int thread, u64 id) | |
496 | { | |
497 | perf_evlist__id_hash(evlist, evsel, cpu, thread, id); | |
498 | evsel->id[evsel->ids++] = id; | |
499 | } | |
500 | ||
501 | static int perf_evlist__id_add_fd(struct perf_evlist *evlist, | |
502 | struct perf_evsel *evsel, | |
503 | int cpu, int thread, int fd) | |
f8a95309 | 504 | { |
f8a95309 | 505 | u64 read_data[4] = { 0, }; |
3d3b5e95 | 506 | int id_idx = 1; /* The first entry is the counter value */ |
e2b5abe0 JO |
507 | u64 id; |
508 | int ret; | |
509 | ||
510 | ret = ioctl(fd, PERF_EVENT_IOC_ID, &id); | |
511 | if (!ret) | |
512 | goto add; | |
513 | ||
514 | if (errno != ENOTTY) | |
515 | return -1; | |
516 | ||
517 | /* Legacy way to get event id.. All hail to old kernels! */ | |
f8a95309 | 518 | |
c4861afe JO |
519 | /* |
520 | * This way does not work with group format read, so bail | |
521 | * out in that case. | |
522 | */ | |
523 | if (perf_evlist__read_format(evlist) & PERF_FORMAT_GROUP) | |
524 | return -1; | |
525 | ||
f8a95309 ACM |
526 | if (!(evsel->attr.read_format & PERF_FORMAT_ID) || |
527 | read(fd, &read_data, sizeof(read_data)) == -1) | |
528 | return -1; | |
529 | ||
530 | if (evsel->attr.read_format & PERF_FORMAT_TOTAL_TIME_ENABLED) | |
531 | ++id_idx; | |
532 | if (evsel->attr.read_format & PERF_FORMAT_TOTAL_TIME_RUNNING) | |
533 | ++id_idx; | |
534 | ||
e2b5abe0 JO |
535 | id = read_data[id_idx]; |
536 | ||
537 | add: | |
538 | perf_evlist__id_add(evlist, evsel, cpu, thread, id); | |
f8a95309 ACM |
539 | return 0; |
540 | } | |
541 | ||
3c659eed AH |
542 | static void perf_evlist__set_sid_idx(struct perf_evlist *evlist, |
543 | struct perf_evsel *evsel, int idx, int cpu, | |
544 | int thread) | |
545 | { | |
546 | struct perf_sample_id *sid = SID(evsel, cpu, thread); | |
547 | sid->idx = idx; | |
548 | if (evlist->cpus && cpu >= 0) | |
549 | sid->cpu = evlist->cpus->map[cpu]; | |
550 | else | |
551 | sid->cpu = -1; | |
552 | if (!evsel->system_wide && evlist->threads && thread >= 0) | |
e13798c7 | 553 | sid->tid = thread_map__pid(evlist->threads, thread); |
3c659eed AH |
554 | else |
555 | sid->tid = -1; | |
556 | } | |
557 | ||
932a3594 | 558 | struct perf_sample_id *perf_evlist__id2sid(struct perf_evlist *evlist, u64 id) |
70db7533 ACM |
559 | { |
560 | struct hlist_head *head; | |
70db7533 ACM |
561 | struct perf_sample_id *sid; |
562 | int hash; | |
563 | ||
70db7533 ACM |
564 | hash = hash_64(id, PERF_EVLIST__HLIST_BITS); |
565 | head = &evlist->heads[hash]; | |
566 | ||
b67bfe0d | 567 | hlist_for_each_entry(sid, head, node) |
70db7533 | 568 | if (sid->id == id) |
932a3594 JO |
569 | return sid; |
570 | ||
571 | return NULL; | |
572 | } | |
573 | ||
574 | struct perf_evsel *perf_evlist__id2evsel(struct perf_evlist *evlist, u64 id) | |
575 | { | |
576 | struct perf_sample_id *sid; | |
577 | ||
05169df5 | 578 | if (evlist->nr_entries == 1 || !id) |
932a3594 JO |
579 | return perf_evlist__first(evlist); |
580 | ||
581 | sid = perf_evlist__id2sid(evlist, id); | |
582 | if (sid) | |
583 | return sid->evsel; | |
30e68bcc NK |
584 | |
585 | if (!perf_evlist__sample_id_all(evlist)) | |
0c21f736 | 586 | return perf_evlist__first(evlist); |
30e68bcc | 587 | |
70db7533 ACM |
588 | return NULL; |
589 | } | |
04391deb | 590 | |
75562573 AH |
591 | static int perf_evlist__event2id(struct perf_evlist *evlist, |
592 | union perf_event *event, u64 *id) | |
593 | { | |
594 | const u64 *array = event->sample.array; | |
595 | ssize_t n; | |
596 | ||
597 | n = (event->header.size - sizeof(event->header)) >> 3; | |
598 | ||
599 | if (event->header.type == PERF_RECORD_SAMPLE) { | |
600 | if (evlist->id_pos >= n) | |
601 | return -1; | |
602 | *id = array[evlist->id_pos]; | |
603 | } else { | |
604 | if (evlist->is_pos > n) | |
605 | return -1; | |
606 | n -= evlist->is_pos; | |
607 | *id = array[n]; | |
608 | } | |
609 | return 0; | |
610 | } | |
611 | ||
612 | static struct perf_evsel *perf_evlist__event2evsel(struct perf_evlist *evlist, | |
613 | union perf_event *event) | |
614 | { | |
98be6966 | 615 | struct perf_evsel *first = perf_evlist__first(evlist); |
75562573 AH |
616 | struct hlist_head *head; |
617 | struct perf_sample_id *sid; | |
618 | int hash; | |
619 | u64 id; | |
620 | ||
621 | if (evlist->nr_entries == 1) | |
98be6966 AH |
622 | return first; |
623 | ||
624 | if (!first->attr.sample_id_all && | |
625 | event->header.type != PERF_RECORD_SAMPLE) | |
626 | return first; | |
75562573 AH |
627 | |
628 | if (perf_evlist__event2id(evlist, event, &id)) | |
629 | return NULL; | |
630 | ||
631 | /* Synthesized events have an id of zero */ | |
632 | if (!id) | |
98be6966 | 633 | return first; |
75562573 AH |
634 | |
635 | hash = hash_64(id, PERF_EVLIST__HLIST_BITS); | |
636 | head = &evlist->heads[hash]; | |
637 | ||
638 | hlist_for_each_entry(sid, head, node) { | |
639 | if (sid->id == id) | |
640 | return sid->evsel; | |
641 | } | |
642 | return NULL; | |
643 | } | |
644 | ||
aece948f | 645 | union perf_event *perf_evlist__mmap_read(struct perf_evlist *evlist, int idx) |
04391deb | 646 | { |
aece948f | 647 | struct perf_mmap *md = &evlist->mmap[idx]; |
7951722d | 648 | u64 head; |
7b8283b5 | 649 | u64 old = md->prev; |
04391deb | 650 | unsigned char *data = md->base + page_size; |
8115d60c | 651 | union perf_event *event = NULL; |
04391deb | 652 | |
7951722d SB |
653 | /* |
654 | * Check if event was unmapped due to a POLLHUP/POLLERR. | |
655 | */ | |
656 | if (!atomic_read(&md->refcnt)) | |
657 | return NULL; | |
658 | ||
659 | head = perf_mmap__read_head(md); | |
7bb41152 | 660 | if (evlist->overwrite) { |
04391deb | 661 | /* |
7bb41152 ACM |
662 | * If we're further behind than half the buffer, there's a chance |
663 | * the writer will bite our tail and mess up the samples under us. | |
664 | * | |
665 | * If we somehow ended up ahead of the head, we got messed up. | |
666 | * | |
667 | * In either case, truncate and restart at head. | |
04391deb | 668 | */ |
7bb41152 ACM |
669 | int diff = head - old; |
670 | if (diff > md->mask / 2 || diff < 0) { | |
671 | fprintf(stderr, "WARNING: failed to keep up with mmap data.\n"); | |
672 | ||
673 | /* | |
674 | * head points to a known good entry, start there. | |
675 | */ | |
676 | old = head; | |
677 | } | |
04391deb ACM |
678 | } |
679 | ||
680 | if (old != head) { | |
681 | size_t size; | |
682 | ||
8115d60c | 683 | event = (union perf_event *)&data[old & md->mask]; |
04391deb ACM |
684 | size = event->header.size; |
685 | ||
686 | /* | |
687 | * Event straddles the mmap boundary -- header should always | |
688 | * be inside due to u64 alignment of output. | |
689 | */ | |
690 | if ((old & md->mask) + size != ((old + size) & md->mask)) { | |
691 | unsigned int offset = old; | |
692 | unsigned int len = min(sizeof(*event), size), cpy; | |
a65cb4b9 | 693 | void *dst = md->event_copy; |
04391deb ACM |
694 | |
695 | do { | |
696 | cpy = min(md->mask + 1 - (offset & md->mask), len); | |
697 | memcpy(dst, &data[offset & md->mask], cpy); | |
698 | offset += cpy; | |
699 | dst += cpy; | |
700 | len -= cpy; | |
701 | } while (len); | |
702 | ||
a65cb4b9 | 703 | event = (union perf_event *) md->event_copy; |
04391deb ACM |
704 | } |
705 | ||
706 | old += size; | |
707 | } | |
708 | ||
709 | md->prev = old; | |
7bb41152 | 710 | |
04391deb ACM |
711 | return event; |
712 | } | |
f8a95309 | 713 | |
82396986 ACM |
714 | static bool perf_mmap__empty(struct perf_mmap *md) |
715 | { | |
b72e74d1 | 716 | return perf_mmap__read_head(md) == md->prev && !md->auxtrace_mmap.base; |
82396986 ACM |
717 | } |
718 | ||
719 | static void perf_evlist__mmap_get(struct perf_evlist *evlist, int idx) | |
720 | { | |
7143849a | 721 | atomic_inc(&evlist->mmap[idx].refcnt); |
82396986 ACM |
722 | } |
723 | ||
724 | static void perf_evlist__mmap_put(struct perf_evlist *evlist, int idx) | |
725 | { | |
7143849a | 726 | BUG_ON(atomic_read(&evlist->mmap[idx].refcnt) == 0); |
82396986 | 727 | |
7143849a | 728 | if (atomic_dec_and_test(&evlist->mmap[idx].refcnt)) |
82396986 ACM |
729 | __perf_evlist__munmap(evlist, idx); |
730 | } | |
731 | ||
8e50d384 ZZ |
732 | void perf_evlist__mmap_consume(struct perf_evlist *evlist, int idx) |
733 | { | |
82396986 ACM |
734 | struct perf_mmap *md = &evlist->mmap[idx]; |
735 | ||
8e50d384 | 736 | if (!evlist->overwrite) { |
7b8283b5 | 737 | u64 old = md->prev; |
8e50d384 ZZ |
738 | |
739 | perf_mmap__write_tail(md, old); | |
740 | } | |
82396986 | 741 | |
7143849a | 742 | if (atomic_read(&md->refcnt) == 1 && perf_mmap__empty(md)) |
82396986 | 743 | perf_evlist__mmap_put(evlist, idx); |
8e50d384 ZZ |
744 | } |
745 | ||
718c602d AH |
746 | int __weak auxtrace_mmap__mmap(struct auxtrace_mmap *mm __maybe_unused, |
747 | struct auxtrace_mmap_params *mp __maybe_unused, | |
748 | void *userpg __maybe_unused, | |
749 | int fd __maybe_unused) | |
750 | { | |
751 | return 0; | |
752 | } | |
753 | ||
754 | void __weak auxtrace_mmap__munmap(struct auxtrace_mmap *mm __maybe_unused) | |
755 | { | |
756 | } | |
757 | ||
758 | void __weak auxtrace_mmap_params__init( | |
759 | struct auxtrace_mmap_params *mp __maybe_unused, | |
760 | off_t auxtrace_offset __maybe_unused, | |
761 | unsigned int auxtrace_pages __maybe_unused, | |
762 | bool auxtrace_overwrite __maybe_unused) | |
763 | { | |
764 | } | |
765 | ||
766 | void __weak auxtrace_mmap_params__set_idx( | |
767 | struct auxtrace_mmap_params *mp __maybe_unused, | |
768 | struct perf_evlist *evlist __maybe_unused, | |
769 | int idx __maybe_unused, | |
770 | bool per_cpu __maybe_unused) | |
771 | { | |
772 | } | |
773 | ||
93edcbd9 AH |
774 | static void __perf_evlist__munmap(struct perf_evlist *evlist, int idx) |
775 | { | |
776 | if (evlist->mmap[idx].base != NULL) { | |
777 | munmap(evlist->mmap[idx].base, evlist->mmap_len); | |
778 | evlist->mmap[idx].base = NULL; | |
7143849a | 779 | atomic_set(&evlist->mmap[idx].refcnt, 0); |
93edcbd9 | 780 | } |
718c602d | 781 | auxtrace_mmap__munmap(&evlist->mmap[idx].auxtrace_mmap); |
93edcbd9 AH |
782 | } |
783 | ||
7e2ed097 | 784 | void perf_evlist__munmap(struct perf_evlist *evlist) |
f8a95309 | 785 | { |
aece948f | 786 | int i; |
f8a95309 | 787 | |
983874d1 ACM |
788 | if (evlist->mmap == NULL) |
789 | return; | |
790 | ||
93edcbd9 AH |
791 | for (i = 0; i < evlist->nr_mmaps; i++) |
792 | __perf_evlist__munmap(evlist, i); | |
aece948f | 793 | |
04662523 | 794 | zfree(&evlist->mmap); |
f8a95309 ACM |
795 | } |
796 | ||
806fb630 | 797 | static int perf_evlist__alloc_mmap(struct perf_evlist *evlist) |
f8a95309 | 798 | { |
a14bb7a6 | 799 | evlist->nr_mmaps = cpu_map__nr(evlist->cpus); |
ec1e7e43 | 800 | if (cpu_map__empty(evlist->cpus)) |
b3a319d5 | 801 | evlist->nr_mmaps = thread_map__nr(evlist->threads); |
aece948f | 802 | evlist->mmap = zalloc(evlist->nr_mmaps * sizeof(struct perf_mmap)); |
f8a95309 ACM |
803 | return evlist->mmap != NULL ? 0 : -ENOMEM; |
804 | } | |
805 | ||
a8a8f3eb AH |
806 | struct mmap_params { |
807 | int prot; | |
808 | int mask; | |
718c602d | 809 | struct auxtrace_mmap_params auxtrace_mp; |
a8a8f3eb AH |
810 | }; |
811 | ||
812 | static int __perf_evlist__mmap(struct perf_evlist *evlist, int idx, | |
813 | struct mmap_params *mp, int fd) | |
f8a95309 | 814 | { |
82396986 ACM |
815 | /* |
816 | * The last one will be done at perf_evlist__mmap_consume(), so that we | |
817 | * make sure we don't prevent tools from consuming every last event in | |
818 | * the ring buffer. | |
819 | * | |
820 | * I.e. we can get the POLLHUP meaning that the fd doesn't exist | |
821 | * anymore, but the last events for it are still in the ring buffer, | |
822 | * waiting to be consumed. | |
823 | * | |
824 | * Tools can chose to ignore this at their own discretion, but the | |
825 | * evlist layer can't just drop it when filtering events in | |
826 | * perf_evlist__filter_pollfd(). | |
827 | */ | |
7143849a | 828 | atomic_set(&evlist->mmap[idx].refcnt, 2); |
aece948f | 829 | evlist->mmap[idx].prev = 0; |
a8a8f3eb AH |
830 | evlist->mmap[idx].mask = mp->mask; |
831 | evlist->mmap[idx].base = mmap(NULL, evlist->mmap_len, mp->prot, | |
f8a95309 | 832 | MAP_SHARED, fd, 0); |
301b195d | 833 | if (evlist->mmap[idx].base == MAP_FAILED) { |
02635965 AH |
834 | pr_debug2("failed to mmap perf event ring buffer, error %d\n", |
835 | errno); | |
301b195d | 836 | evlist->mmap[idx].base = NULL; |
f8a95309 | 837 | return -1; |
301b195d | 838 | } |
ad6765dd | 839 | |
718c602d AH |
840 | if (auxtrace_mmap__mmap(&evlist->mmap[idx].auxtrace_mmap, |
841 | &mp->auxtrace_mp, evlist->mmap[idx].base, fd)) | |
842 | return -1; | |
843 | ||
f8a95309 ACM |
844 | return 0; |
845 | } | |
846 | ||
04e21314 | 847 | static int perf_evlist__mmap_per_evsel(struct perf_evlist *evlist, int idx, |
a8a8f3eb AH |
848 | struct mmap_params *mp, int cpu, |
849 | int thread, int *output) | |
aece948f ACM |
850 | { |
851 | struct perf_evsel *evsel; | |
04e21314 | 852 | |
0050f7aa | 853 | evlist__for_each(evlist, evsel) { |
bf8e8f4b AH |
854 | int fd; |
855 | ||
856 | if (evsel->system_wide && thread) | |
857 | continue; | |
858 | ||
859 | fd = FD(evsel, cpu, thread); | |
04e21314 AH |
860 | |
861 | if (*output == -1) { | |
862 | *output = fd; | |
a8a8f3eb | 863 | if (__perf_evlist__mmap(evlist, idx, mp, *output) < 0) |
04e21314 AH |
864 | return -1; |
865 | } else { | |
866 | if (ioctl(fd, PERF_EVENT_IOC_SET_OUTPUT, *output) != 0) | |
867 | return -1; | |
82396986 ACM |
868 | |
869 | perf_evlist__mmap_get(evlist, idx); | |
04e21314 AH |
870 | } |
871 | ||
f90d194a AH |
872 | /* |
873 | * The system_wide flag causes a selected event to be opened | |
874 | * always without a pid. Consequently it will never get a | |
875 | * POLLHUP, but it is used for tracking in combination with | |
876 | * other events, so it should not need to be polled anyway. | |
877 | * Therefore don't add it for polling. | |
878 | */ | |
879 | if (!evsel->system_wide && | |
880 | __perf_evlist__add_pollfd(evlist, fd, idx) < 0) { | |
82396986 | 881 | perf_evlist__mmap_put(evlist, idx); |
ad6765dd | 882 | return -1; |
82396986 | 883 | } |
033fa713 | 884 | |
3c659eed AH |
885 | if (evsel->attr.read_format & PERF_FORMAT_ID) { |
886 | if (perf_evlist__id_add_fd(evlist, evsel, cpu, thread, | |
887 | fd) < 0) | |
888 | return -1; | |
889 | perf_evlist__set_sid_idx(evlist, evsel, idx, cpu, | |
890 | thread); | |
891 | } | |
04e21314 AH |
892 | } |
893 | ||
894 | return 0; | |
895 | } | |
896 | ||
a8a8f3eb AH |
897 | static int perf_evlist__mmap_per_cpu(struct perf_evlist *evlist, |
898 | struct mmap_params *mp) | |
04e21314 | 899 | { |
aece948f | 900 | int cpu, thread; |
b3a319d5 NK |
901 | int nr_cpus = cpu_map__nr(evlist->cpus); |
902 | int nr_threads = thread_map__nr(evlist->threads); | |
aece948f | 903 | |
e3e1a54f | 904 | pr_debug2("perf event ring buffer mmapped per cpu\n"); |
b3a319d5 | 905 | for (cpu = 0; cpu < nr_cpus; cpu++) { |
aece948f ACM |
906 | int output = -1; |
907 | ||
718c602d AH |
908 | auxtrace_mmap_params__set_idx(&mp->auxtrace_mp, evlist, cpu, |
909 | true); | |
910 | ||
b3a319d5 | 911 | for (thread = 0; thread < nr_threads; thread++) { |
a8a8f3eb AH |
912 | if (perf_evlist__mmap_per_evsel(evlist, cpu, mp, cpu, |
913 | thread, &output)) | |
04e21314 | 914 | goto out_unmap; |
aece948f ACM |
915 | } |
916 | } | |
917 | ||
918 | return 0; | |
919 | ||
920 | out_unmap: | |
93edcbd9 AH |
921 | for (cpu = 0; cpu < nr_cpus; cpu++) |
922 | __perf_evlist__munmap(evlist, cpu); | |
aece948f ACM |
923 | return -1; |
924 | } | |
925 | ||
a8a8f3eb AH |
926 | static int perf_evlist__mmap_per_thread(struct perf_evlist *evlist, |
927 | struct mmap_params *mp) | |
aece948f | 928 | { |
aece948f | 929 | int thread; |
b3a319d5 | 930 | int nr_threads = thread_map__nr(evlist->threads); |
aece948f | 931 | |
e3e1a54f | 932 | pr_debug2("perf event ring buffer mmapped per thread\n"); |
b3a319d5 | 933 | for (thread = 0; thread < nr_threads; thread++) { |
aece948f ACM |
934 | int output = -1; |
935 | ||
718c602d AH |
936 | auxtrace_mmap_params__set_idx(&mp->auxtrace_mp, evlist, thread, |
937 | false); | |
938 | ||
a8a8f3eb AH |
939 | if (perf_evlist__mmap_per_evsel(evlist, thread, mp, 0, thread, |
940 | &output)) | |
04e21314 | 941 | goto out_unmap; |
aece948f ACM |
942 | } |
943 | ||
944 | return 0; | |
945 | ||
946 | out_unmap: | |
93edcbd9 AH |
947 | for (thread = 0; thread < nr_threads; thread++) |
948 | __perf_evlist__munmap(evlist, thread); | |
aece948f ACM |
949 | return -1; |
950 | } | |
951 | ||
994a1f78 JO |
952 | static size_t perf_evlist__mmap_size(unsigned long pages) |
953 | { | |
8185e881 ACM |
954 | if (pages == UINT_MAX) { |
955 | int max; | |
956 | ||
957 | if (sysctl__read_int("kernel/perf_event_mlock_kb", &max) < 0) { | |
958 | /* | |
959 | * Pick a once upon a time good value, i.e. things look | |
960 | * strange since we can't read a sysctl value, but lets not | |
961 | * die yet... | |
962 | */ | |
963 | max = 512; | |
964 | } else { | |
965 | max -= (page_size / 1024); | |
966 | } | |
967 | ||
968 | pages = (max * 1024) / page_size; | |
1be300f4 ACM |
969 | if (!is_power_of_2(pages)) |
970 | pages = rounddown_pow_of_two(pages); | |
8185e881 | 971 | } else if (!is_power_of_2(pages)) |
994a1f78 JO |
972 | return 0; |
973 | ||
974 | return (pages + 1) * page_size; | |
975 | } | |
976 | ||
33c2dcfd DA |
977 | static long parse_pages_arg(const char *str, unsigned long min, |
978 | unsigned long max) | |
994a1f78 | 979 | { |
2fbe4abe | 980 | unsigned long pages, val; |
27050f53 JO |
981 | static struct parse_tag tags[] = { |
982 | { .tag = 'B', .mult = 1 }, | |
983 | { .tag = 'K', .mult = 1 << 10 }, | |
984 | { .tag = 'M', .mult = 1 << 20 }, | |
985 | { .tag = 'G', .mult = 1 << 30 }, | |
986 | { .tag = 0 }, | |
987 | }; | |
994a1f78 | 988 | |
8973504b | 989 | if (str == NULL) |
33c2dcfd | 990 | return -EINVAL; |
8973504b | 991 | |
27050f53 | 992 | val = parse_tag_value(str, tags); |
2fbe4abe | 993 | if (val != (unsigned long) -1) { |
27050f53 JO |
994 | /* we got file size value */ |
995 | pages = PERF_ALIGN(val, page_size) / page_size; | |
27050f53 JO |
996 | } else { |
997 | /* we got pages count value */ | |
998 | char *eptr; | |
999 | pages = strtoul(str, &eptr, 10); | |
33c2dcfd DA |
1000 | if (*eptr != '\0') |
1001 | return -EINVAL; | |
994a1f78 JO |
1002 | } |
1003 | ||
2bcab6c1 | 1004 | if (pages == 0 && min == 0) { |
33c2dcfd | 1005 | /* leave number of pages at 0 */ |
1dbfa938 | 1006 | } else if (!is_power_of_2(pages)) { |
33c2dcfd | 1007 | /* round pages up to next power of 2 */ |
91529834 | 1008 | pages = roundup_pow_of_two(pages); |
1dbfa938 AH |
1009 | if (!pages) |
1010 | return -EINVAL; | |
9639837e DA |
1011 | pr_info("rounding mmap pages size to %lu bytes (%lu pages)\n", |
1012 | pages * page_size, pages); | |
2fbe4abe AH |
1013 | } |
1014 | ||
33c2dcfd DA |
1015 | if (pages > max) |
1016 | return -EINVAL; | |
1017 | ||
1018 | return pages; | |
1019 | } | |
1020 | ||
e9db1310 | 1021 | int __perf_evlist__parse_mmap_pages(unsigned int *mmap_pages, const char *str) |
33c2dcfd | 1022 | { |
33c2dcfd DA |
1023 | unsigned long max = UINT_MAX; |
1024 | long pages; | |
1025 | ||
f5ae9c42 | 1026 | if (max > SIZE_MAX / page_size) |
33c2dcfd DA |
1027 | max = SIZE_MAX / page_size; |
1028 | ||
1029 | pages = parse_pages_arg(str, 1, max); | |
1030 | if (pages < 0) { | |
1031 | pr_err("Invalid argument for --mmap_pages/-m\n"); | |
994a1f78 JO |
1032 | return -1; |
1033 | } | |
1034 | ||
1035 | *mmap_pages = pages; | |
1036 | return 0; | |
1037 | } | |
1038 | ||
e9db1310 AH |
1039 | int perf_evlist__parse_mmap_pages(const struct option *opt, const char *str, |
1040 | int unset __maybe_unused) | |
1041 | { | |
1042 | return __perf_evlist__parse_mmap_pages(opt->value, str); | |
1043 | } | |
1044 | ||
c83fa7f2 | 1045 | /** |
718c602d | 1046 | * perf_evlist__mmap_ex - Create mmaps to receive events. |
c83fa7f2 AH |
1047 | * @evlist: list of events |
1048 | * @pages: map length in pages | |
1049 | * @overwrite: overwrite older events? | |
718c602d AH |
1050 | * @auxtrace_pages - auxtrace map length in pages |
1051 | * @auxtrace_overwrite - overwrite older auxtrace data? | |
f8a95309 | 1052 | * |
c83fa7f2 AH |
1053 | * If @overwrite is %false the user needs to signal event consumption using |
1054 | * perf_mmap__write_tail(). Using perf_evlist__mmap_read() does this | |
1055 | * automatically. | |
7e2ed097 | 1056 | * |
718c602d AH |
1057 | * Similarly, if @auxtrace_overwrite is %false the user needs to signal data |
1058 | * consumption using auxtrace_mmap__write_tail(). | |
1059 | * | |
c83fa7f2 | 1060 | * Return: %0 on success, negative error code otherwise. |
f8a95309 | 1061 | */ |
718c602d AH |
1062 | int perf_evlist__mmap_ex(struct perf_evlist *evlist, unsigned int pages, |
1063 | bool overwrite, unsigned int auxtrace_pages, | |
1064 | bool auxtrace_overwrite) | |
f8a95309 | 1065 | { |
aece948f | 1066 | struct perf_evsel *evsel; |
7e2ed097 ACM |
1067 | const struct cpu_map *cpus = evlist->cpus; |
1068 | const struct thread_map *threads = evlist->threads; | |
a8a8f3eb AH |
1069 | struct mmap_params mp = { |
1070 | .prot = PROT_READ | (overwrite ? 0 : PROT_WRITE), | |
1071 | }; | |
50a682ce | 1072 | |
7e2ed097 | 1073 | if (evlist->mmap == NULL && perf_evlist__alloc_mmap(evlist) < 0) |
f8a95309 ACM |
1074 | return -ENOMEM; |
1075 | ||
1b85337d | 1076 | if (evlist->pollfd.entries == NULL && perf_evlist__alloc_pollfd(evlist) < 0) |
f8a95309 ACM |
1077 | return -ENOMEM; |
1078 | ||
1079 | evlist->overwrite = overwrite; | |
994a1f78 | 1080 | evlist->mmap_len = perf_evlist__mmap_size(pages); |
2af68ef5 | 1081 | pr_debug("mmap size %zuB\n", evlist->mmap_len); |
a8a8f3eb | 1082 | mp.mask = evlist->mmap_len - page_size - 1; |
f8a95309 | 1083 | |
718c602d AH |
1084 | auxtrace_mmap_params__init(&mp.auxtrace_mp, evlist->mmap_len, |
1085 | auxtrace_pages, auxtrace_overwrite); | |
1086 | ||
0050f7aa | 1087 | evlist__for_each(evlist, evsel) { |
f8a95309 | 1088 | if ((evsel->attr.read_format & PERF_FORMAT_ID) && |
a91e5431 | 1089 | evsel->sample_id == NULL && |
a14bb7a6 | 1090 | perf_evsel__alloc_id(evsel, cpu_map__nr(cpus), threads->nr) < 0) |
f8a95309 | 1091 | return -ENOMEM; |
f8a95309 ACM |
1092 | } |
1093 | ||
ec1e7e43 | 1094 | if (cpu_map__empty(cpus)) |
a8a8f3eb | 1095 | return perf_evlist__mmap_per_thread(evlist, &mp); |
f8a95309 | 1096 | |
a8a8f3eb | 1097 | return perf_evlist__mmap_per_cpu(evlist, &mp); |
f8a95309 | 1098 | } |
7e2ed097 | 1099 | |
718c602d AH |
1100 | int perf_evlist__mmap(struct perf_evlist *evlist, unsigned int pages, |
1101 | bool overwrite) | |
1102 | { | |
1103 | return perf_evlist__mmap_ex(evlist, pages, overwrite, 0, false); | |
1104 | } | |
1105 | ||
b7f0c203 | 1106 | static int perf_evlist__propagate_maps(struct perf_evlist *evlist, |
52361ff0 | 1107 | bool has_user_cpus) |
b7f0c203 JO |
1108 | { |
1109 | struct perf_evsel *evsel; | |
1110 | ||
1111 | evlist__for_each(evlist, evsel) { | |
1112 | /* | |
1113 | * We already have cpus for evsel (via PMU sysfs) so | |
1114 | * keep it, if there's no target cpu list defined. | |
1115 | */ | |
52361ff0 | 1116 | if (evsel->cpus && has_user_cpus) |
b7f0c203 JO |
1117 | cpu_map__put(evsel->cpus); |
1118 | ||
52361ff0 | 1119 | if (!evsel->cpus || has_user_cpus) |
b7f0c203 JO |
1120 | evsel->cpus = cpu_map__get(evlist->cpus); |
1121 | ||
578e91ec JO |
1122 | evsel->threads = thread_map__get(evlist->threads); |
1123 | ||
0e5ffb31 JO |
1124 | if ((evlist->cpus && !evsel->cpus) || |
1125 | (evlist->threads && !evsel->threads)) | |
b7f0c203 JO |
1126 | return -ENOMEM; |
1127 | } | |
1128 | ||
1129 | return 0; | |
1130 | } | |
1131 | ||
602ad878 | 1132 | int perf_evlist__create_maps(struct perf_evlist *evlist, struct target *target) |
7e2ed097 | 1133 | { |
b809ac10 NK |
1134 | evlist->threads = thread_map__new_str(target->pid, target->tid, |
1135 | target->uid); | |
7e2ed097 ACM |
1136 | |
1137 | if (evlist->threads == NULL) | |
1138 | return -1; | |
1139 | ||
9c105fbc | 1140 | if (target__uses_dummy_map(target)) |
d1cb9fce | 1141 | evlist->cpus = cpu_map__dummy_new(); |
879d77d0 NK |
1142 | else |
1143 | evlist->cpus = cpu_map__new(target->cpu_list); | |
7e2ed097 ACM |
1144 | |
1145 | if (evlist->cpus == NULL) | |
1146 | goto out_delete_threads; | |
1147 | ||
52361ff0 | 1148 | return perf_evlist__propagate_maps(evlist, !!target->cpu_list); |
7e2ed097 ACM |
1149 | |
1150 | out_delete_threads: | |
186fbb74 | 1151 | thread_map__put(evlist->threads); |
b2e19a93 | 1152 | evlist->threads = NULL; |
7e2ed097 ACM |
1153 | return -1; |
1154 | } | |
1155 | ||
3de5cfb0 JO |
1156 | int perf_evlist__set_maps(struct perf_evlist *evlist, |
1157 | struct cpu_map *cpus, | |
1158 | struct thread_map *threads) | |
1159 | { | |
1160 | if (evlist->cpus) | |
1161 | cpu_map__put(evlist->cpus); | |
1162 | ||
1163 | evlist->cpus = cpus; | |
1164 | ||
1165 | if (evlist->threads) | |
1166 | thread_map__put(evlist->threads); | |
1167 | ||
1168 | evlist->threads = threads; | |
1169 | ||
1170 | return perf_evlist__propagate_maps(evlist, false); | |
1171 | } | |
1172 | ||
23d4aad4 | 1173 | int perf_evlist__apply_filters(struct perf_evlist *evlist, struct perf_evsel **err_evsel) |
0a102479 | 1174 | { |
0a102479 | 1175 | struct perf_evsel *evsel; |
745cefc5 ACM |
1176 | int err = 0; |
1177 | const int ncpus = cpu_map__nr(evlist->cpus), | |
b3a319d5 | 1178 | nthreads = thread_map__nr(evlist->threads); |
0a102479 | 1179 | |
0050f7aa | 1180 | evlist__for_each(evlist, evsel) { |
745cefc5 | 1181 | if (evsel->filter == NULL) |
0a102479 | 1182 | continue; |
745cefc5 | 1183 | |
f47805a2 | 1184 | err = perf_evsel__apply_filter(evsel, ncpus, nthreads, evsel->filter); |
23d4aad4 ACM |
1185 | if (err) { |
1186 | *err_evsel = evsel; | |
745cefc5 | 1187 | break; |
23d4aad4 | 1188 | } |
0a102479 FW |
1189 | } |
1190 | ||
745cefc5 ACM |
1191 | return err; |
1192 | } | |
1193 | ||
1194 | int perf_evlist__set_filter(struct perf_evlist *evlist, const char *filter) | |
1195 | { | |
1196 | struct perf_evsel *evsel; | |
1197 | int err = 0; | |
745cefc5 | 1198 | |
0050f7aa | 1199 | evlist__for_each(evlist, evsel) { |
94ad89bc | 1200 | err = perf_evsel__set_filter(evsel, filter); |
745cefc5 ACM |
1201 | if (err) |
1202 | break; | |
1203 | } | |
1204 | ||
1205 | return err; | |
0a102479 | 1206 | } |
74429964 | 1207 | |
be199ada | 1208 | int perf_evlist__set_filter_pids(struct perf_evlist *evlist, size_t npids, pid_t *pids) |
cfd70a26 ACM |
1209 | { |
1210 | char *filter; | |
be199ada ACM |
1211 | int ret = -1; |
1212 | size_t i; | |
cfd70a26 | 1213 | |
be199ada ACM |
1214 | for (i = 0; i < npids; ++i) { |
1215 | if (i == 0) { | |
1216 | if (asprintf(&filter, "common_pid != %d", pids[i]) < 0) | |
1217 | return -1; | |
1218 | } else { | |
1219 | char *tmp; | |
1220 | ||
1221 | if (asprintf(&tmp, "%s && common_pid != %d", filter, pids[i]) < 0) | |
1222 | goto out_free; | |
1223 | ||
1224 | free(filter); | |
1225 | filter = tmp; | |
1226 | } | |
1227 | } | |
cfd70a26 ACM |
1228 | |
1229 | ret = perf_evlist__set_filter(evlist, filter); | |
be199ada | 1230 | out_free: |
cfd70a26 ACM |
1231 | free(filter); |
1232 | return ret; | |
1233 | } | |
1234 | ||
be199ada ACM |
1235 | int perf_evlist__set_filter_pid(struct perf_evlist *evlist, pid_t pid) |
1236 | { | |
1237 | return perf_evlist__set_filter_pids(evlist, 1, &pid); | |
1238 | } | |
1239 | ||
0c21f736 | 1240 | bool perf_evlist__valid_sample_type(struct perf_evlist *evlist) |
74429964 | 1241 | { |
75562573 | 1242 | struct perf_evsel *pos; |
c2a70653 | 1243 | |
75562573 AH |
1244 | if (evlist->nr_entries == 1) |
1245 | return true; | |
1246 | ||
1247 | if (evlist->id_pos < 0 || evlist->is_pos < 0) | |
1248 | return false; | |
1249 | ||
0050f7aa | 1250 | evlist__for_each(evlist, pos) { |
75562573 AH |
1251 | if (pos->id_pos != evlist->id_pos || |
1252 | pos->is_pos != evlist->is_pos) | |
c2a70653 | 1253 | return false; |
74429964 FW |
1254 | } |
1255 | ||
c2a70653 | 1256 | return true; |
74429964 FW |
1257 | } |
1258 | ||
75562573 | 1259 | u64 __perf_evlist__combined_sample_type(struct perf_evlist *evlist) |
c2a70653 | 1260 | { |
75562573 AH |
1261 | struct perf_evsel *evsel; |
1262 | ||
1263 | if (evlist->combined_sample_type) | |
1264 | return evlist->combined_sample_type; | |
1265 | ||
0050f7aa | 1266 | evlist__for_each(evlist, evsel) |
75562573 AH |
1267 | evlist->combined_sample_type |= evsel->attr.sample_type; |
1268 | ||
1269 | return evlist->combined_sample_type; | |
1270 | } | |
1271 | ||
1272 | u64 perf_evlist__combined_sample_type(struct perf_evlist *evlist) | |
1273 | { | |
1274 | evlist->combined_sample_type = 0; | |
1275 | return __perf_evlist__combined_sample_type(evlist); | |
c2a70653 ACM |
1276 | } |
1277 | ||
98df858e AK |
1278 | u64 perf_evlist__combined_branch_type(struct perf_evlist *evlist) |
1279 | { | |
1280 | struct perf_evsel *evsel; | |
1281 | u64 branch_type = 0; | |
1282 | ||
1283 | evlist__for_each(evlist, evsel) | |
1284 | branch_type |= evsel->attr.branch_sample_type; | |
1285 | return branch_type; | |
1286 | } | |
1287 | ||
9ede473c JO |
1288 | bool perf_evlist__valid_read_format(struct perf_evlist *evlist) |
1289 | { | |
1290 | struct perf_evsel *first = perf_evlist__first(evlist), *pos = first; | |
1291 | u64 read_format = first->attr.read_format; | |
1292 | u64 sample_type = first->attr.sample_type; | |
1293 | ||
0050f7aa | 1294 | evlist__for_each(evlist, pos) { |
9ede473c JO |
1295 | if (read_format != pos->attr.read_format) |
1296 | return false; | |
1297 | } | |
1298 | ||
1299 | /* PERF_SAMPLE_READ imples PERF_FORMAT_ID. */ | |
1300 | if ((sample_type & PERF_SAMPLE_READ) && | |
1301 | !(read_format & PERF_FORMAT_ID)) { | |
1302 | return false; | |
1303 | } | |
1304 | ||
1305 | return true; | |
1306 | } | |
1307 | ||
1308 | u64 perf_evlist__read_format(struct perf_evlist *evlist) | |
1309 | { | |
1310 | struct perf_evsel *first = perf_evlist__first(evlist); | |
1311 | return first->attr.read_format; | |
1312 | } | |
1313 | ||
0c21f736 | 1314 | u16 perf_evlist__id_hdr_size(struct perf_evlist *evlist) |
81e36bff | 1315 | { |
0c21f736 | 1316 | struct perf_evsel *first = perf_evlist__first(evlist); |
81e36bff ACM |
1317 | struct perf_sample *data; |
1318 | u64 sample_type; | |
1319 | u16 size = 0; | |
1320 | ||
81e36bff ACM |
1321 | if (!first->attr.sample_id_all) |
1322 | goto out; | |
1323 | ||
1324 | sample_type = first->attr.sample_type; | |
1325 | ||
1326 | if (sample_type & PERF_SAMPLE_TID) | |
1327 | size += sizeof(data->tid) * 2; | |
1328 | ||
1329 | if (sample_type & PERF_SAMPLE_TIME) | |
1330 | size += sizeof(data->time); | |
1331 | ||
1332 | if (sample_type & PERF_SAMPLE_ID) | |
1333 | size += sizeof(data->id); | |
1334 | ||
1335 | if (sample_type & PERF_SAMPLE_STREAM_ID) | |
1336 | size += sizeof(data->stream_id); | |
1337 | ||
1338 | if (sample_type & PERF_SAMPLE_CPU) | |
1339 | size += sizeof(data->cpu) * 2; | |
75562573 AH |
1340 | |
1341 | if (sample_type & PERF_SAMPLE_IDENTIFIER) | |
1342 | size += sizeof(data->id); | |
81e36bff ACM |
1343 | out: |
1344 | return size; | |
1345 | } | |
1346 | ||
0c21f736 | 1347 | bool perf_evlist__valid_sample_id_all(struct perf_evlist *evlist) |
74429964 | 1348 | { |
0c21f736 | 1349 | struct perf_evsel *first = perf_evlist__first(evlist), *pos = first; |
c2a70653 | 1350 | |
0050f7aa | 1351 | evlist__for_each_continue(evlist, pos) { |
c2a70653 ACM |
1352 | if (first->attr.sample_id_all != pos->attr.sample_id_all) |
1353 | return false; | |
74429964 FW |
1354 | } |
1355 | ||
c2a70653 ACM |
1356 | return true; |
1357 | } | |
1358 | ||
0c21f736 | 1359 | bool perf_evlist__sample_id_all(struct perf_evlist *evlist) |
c2a70653 | 1360 | { |
0c21f736 | 1361 | struct perf_evsel *first = perf_evlist__first(evlist); |
c2a70653 | 1362 | return first->attr.sample_id_all; |
74429964 | 1363 | } |
81cce8de ACM |
1364 | |
1365 | void perf_evlist__set_selected(struct perf_evlist *evlist, | |
1366 | struct perf_evsel *evsel) | |
1367 | { | |
1368 | evlist->selected = evsel; | |
1369 | } | |
727ab04e | 1370 | |
a74b4b66 NK |
1371 | void perf_evlist__close(struct perf_evlist *evlist) |
1372 | { | |
1373 | struct perf_evsel *evsel; | |
1374 | int ncpus = cpu_map__nr(evlist->cpus); | |
1375 | int nthreads = thread_map__nr(evlist->threads); | |
8ad9219e | 1376 | int n; |
a74b4b66 | 1377 | |
8ad9219e SE |
1378 | evlist__for_each_reverse(evlist, evsel) { |
1379 | n = evsel->cpus ? evsel->cpus->nr : ncpus; | |
1380 | perf_evsel__close(evsel, n, nthreads); | |
1381 | } | |
a74b4b66 NK |
1382 | } |
1383 | ||
4112eb18 ACM |
1384 | static int perf_evlist__create_syswide_maps(struct perf_evlist *evlist) |
1385 | { | |
1386 | int err = -ENOMEM; | |
1387 | ||
1388 | /* | |
1389 | * Try reading /sys/devices/system/cpu/online to get | |
1390 | * an all cpus map. | |
1391 | * | |
1392 | * FIXME: -ENOMEM is the best we can do here, the cpu_map | |
1393 | * code needs an overhaul to properly forward the | |
1394 | * error, and we may not want to do that fallback to a | |
1395 | * default cpu identity map :-\ | |
1396 | */ | |
1397 | evlist->cpus = cpu_map__new(NULL); | |
1398 | if (evlist->cpus == NULL) | |
1399 | goto out; | |
1400 | ||
1401 | evlist->threads = thread_map__new_dummy(); | |
1402 | if (evlist->threads == NULL) | |
1403 | goto out_free_cpus; | |
1404 | ||
1405 | err = 0; | |
1406 | out: | |
1407 | return err; | |
1408 | out_free_cpus: | |
f30a79b0 | 1409 | cpu_map__put(evlist->cpus); |
4112eb18 ACM |
1410 | evlist->cpus = NULL; |
1411 | goto out; | |
1412 | } | |
1413 | ||
6a4bb04c | 1414 | int perf_evlist__open(struct perf_evlist *evlist) |
727ab04e | 1415 | { |
6a4bb04c | 1416 | struct perf_evsel *evsel; |
a74b4b66 | 1417 | int err; |
727ab04e | 1418 | |
4112eb18 ACM |
1419 | /* |
1420 | * Default: one fd per CPU, all threads, aka systemwide | |
1421 | * as sys_perf_event_open(cpu = -1, thread = -1) is EINVAL | |
1422 | */ | |
1423 | if (evlist->threads == NULL && evlist->cpus == NULL) { | |
1424 | err = perf_evlist__create_syswide_maps(evlist); | |
1425 | if (err < 0) | |
1426 | goto out_err; | |
1427 | } | |
1428 | ||
733cd2fe AH |
1429 | perf_evlist__update_id_pos(evlist); |
1430 | ||
0050f7aa | 1431 | evlist__for_each(evlist, evsel) { |
6a4bb04c | 1432 | err = perf_evsel__open(evsel, evlist->cpus, evlist->threads); |
727ab04e ACM |
1433 | if (err < 0) |
1434 | goto out_err; | |
1435 | } | |
1436 | ||
1437 | return 0; | |
1438 | out_err: | |
a74b4b66 | 1439 | perf_evlist__close(evlist); |
41c21a68 | 1440 | errno = -err; |
727ab04e ACM |
1441 | return err; |
1442 | } | |
35b9d88e | 1443 | |
602ad878 | 1444 | int perf_evlist__prepare_workload(struct perf_evlist *evlist, struct target *target, |
55e162ea | 1445 | const char *argv[], bool pipe_output, |
735f7e0b | 1446 | void (*exec_error)(int signo, siginfo_t *info, void *ucontext)) |
35b9d88e ACM |
1447 | { |
1448 | int child_ready_pipe[2], go_pipe[2]; | |
1449 | char bf; | |
1450 | ||
1451 | if (pipe(child_ready_pipe) < 0) { | |
1452 | perror("failed to create 'ready' pipe"); | |
1453 | return -1; | |
1454 | } | |
1455 | ||
1456 | if (pipe(go_pipe) < 0) { | |
1457 | perror("failed to create 'go' pipe"); | |
1458 | goto out_close_ready_pipe; | |
1459 | } | |
1460 | ||
1461 | evlist->workload.pid = fork(); | |
1462 | if (evlist->workload.pid < 0) { | |
1463 | perror("failed to fork"); | |
1464 | goto out_close_pipes; | |
1465 | } | |
1466 | ||
1467 | if (!evlist->workload.pid) { | |
5f1c4225 ACM |
1468 | int ret; |
1469 | ||
119fa3c9 | 1470 | if (pipe_output) |
35b9d88e ACM |
1471 | dup2(2, 1); |
1472 | ||
0817df08 DA |
1473 | signal(SIGTERM, SIG_DFL); |
1474 | ||
35b9d88e ACM |
1475 | close(child_ready_pipe[0]); |
1476 | close(go_pipe[1]); | |
1477 | fcntl(go_pipe[0], F_SETFD, FD_CLOEXEC); | |
1478 | ||
35b9d88e ACM |
1479 | /* |
1480 | * Tell the parent we're ready to go | |
1481 | */ | |
1482 | close(child_ready_pipe[1]); | |
1483 | ||
1484 | /* | |
1485 | * Wait until the parent tells us to go. | |
1486 | */ | |
5f1c4225 ACM |
1487 | ret = read(go_pipe[0], &bf, 1); |
1488 | /* | |
1489 | * The parent will ask for the execvp() to be performed by | |
1490 | * writing exactly one byte, in workload.cork_fd, usually via | |
1491 | * perf_evlist__start_workload(). | |
1492 | * | |
20f86fc1 | 1493 | * For cancelling the workload without actually running it, |
5f1c4225 ACM |
1494 | * the parent will just close workload.cork_fd, without writing |
1495 | * anything, i.e. read will return zero and we just exit() | |
1496 | * here. | |
1497 | */ | |
1498 | if (ret != 1) { | |
1499 | if (ret == -1) | |
1500 | perror("unable to read pipe"); | |
1501 | exit(ret); | |
1502 | } | |
35b9d88e ACM |
1503 | |
1504 | execvp(argv[0], (char **)argv); | |
1505 | ||
735f7e0b | 1506 | if (exec_error) { |
f33cbe72 ACM |
1507 | union sigval val; |
1508 | ||
1509 | val.sival_int = errno; | |
1510 | if (sigqueue(getppid(), SIGUSR1, val)) | |
1511 | perror(argv[0]); | |
1512 | } else | |
1513 | perror(argv[0]); | |
35b9d88e ACM |
1514 | exit(-1); |
1515 | } | |
1516 | ||
735f7e0b ACM |
1517 | if (exec_error) { |
1518 | struct sigaction act = { | |
1519 | .sa_flags = SA_SIGINFO, | |
1520 | .sa_sigaction = exec_error, | |
1521 | }; | |
1522 | sigaction(SIGUSR1, &act, NULL); | |
1523 | } | |
1524 | ||
1aaf63b1 ACM |
1525 | if (target__none(target)) { |
1526 | if (evlist->threads == NULL) { | |
1527 | fprintf(stderr, "FATAL: evlist->threads need to be set at this point (%s:%d).\n", | |
1528 | __func__, __LINE__); | |
1529 | goto out_close_pipes; | |
1530 | } | |
e13798c7 | 1531 | thread_map__set_pid(evlist->threads, 0, evlist->workload.pid); |
1aaf63b1 | 1532 | } |
35b9d88e ACM |
1533 | |
1534 | close(child_ready_pipe[1]); | |
1535 | close(go_pipe[0]); | |
1536 | /* | |
1537 | * wait for child to settle | |
1538 | */ | |
1539 | if (read(child_ready_pipe[0], &bf, 1) == -1) { | |
1540 | perror("unable to read pipe"); | |
1541 | goto out_close_pipes; | |
1542 | } | |
1543 | ||
bcf3145f | 1544 | fcntl(go_pipe[1], F_SETFD, FD_CLOEXEC); |
35b9d88e ACM |
1545 | evlist->workload.cork_fd = go_pipe[1]; |
1546 | close(child_ready_pipe[0]); | |
1547 | return 0; | |
1548 | ||
1549 | out_close_pipes: | |
1550 | close(go_pipe[0]); | |
1551 | close(go_pipe[1]); | |
1552 | out_close_ready_pipe: | |
1553 | close(child_ready_pipe[0]); | |
1554 | close(child_ready_pipe[1]); | |
1555 | return -1; | |
1556 | } | |
1557 | ||
1558 | int perf_evlist__start_workload(struct perf_evlist *evlist) | |
1559 | { | |
1560 | if (evlist->workload.cork_fd > 0) { | |
b3824404 | 1561 | char bf = 0; |
bcf3145f | 1562 | int ret; |
35b9d88e ACM |
1563 | /* |
1564 | * Remove the cork, let it rip! | |
1565 | */ | |
bcf3145f NK |
1566 | ret = write(evlist->workload.cork_fd, &bf, 1); |
1567 | if (ret < 0) | |
1568 | perror("enable to write to pipe"); | |
1569 | ||
1570 | close(evlist->workload.cork_fd); | |
1571 | return ret; | |
35b9d88e ACM |
1572 | } |
1573 | ||
1574 | return 0; | |
1575 | } | |
cb0b29e0 | 1576 | |
a3f698fe | 1577 | int perf_evlist__parse_sample(struct perf_evlist *evlist, union perf_event *event, |
0807d2d8 | 1578 | struct perf_sample *sample) |
cb0b29e0 | 1579 | { |
75562573 AH |
1580 | struct perf_evsel *evsel = perf_evlist__event2evsel(evlist, event); |
1581 | ||
1582 | if (!evsel) | |
1583 | return -EFAULT; | |
0807d2d8 | 1584 | return perf_evsel__parse_sample(evsel, event, sample); |
cb0b29e0 | 1585 | } |
78f067b3 ACM |
1586 | |
1587 | size_t perf_evlist__fprintf(struct perf_evlist *evlist, FILE *fp) | |
1588 | { | |
1589 | struct perf_evsel *evsel; | |
1590 | size_t printed = 0; | |
1591 | ||
0050f7aa | 1592 | evlist__for_each(evlist, evsel) { |
78f067b3 ACM |
1593 | printed += fprintf(fp, "%s%s", evsel->idx ? ", " : "", |
1594 | perf_evsel__name(evsel)); | |
1595 | } | |
1596 | ||
b2222139 | 1597 | return printed + fprintf(fp, "\n"); |
78f067b3 | 1598 | } |
6ef068cb | 1599 | |
a8f23d8f ACM |
1600 | int perf_evlist__strerror_open(struct perf_evlist *evlist __maybe_unused, |
1601 | int err, char *buf, size_t size) | |
1602 | { | |
1603 | int printed, value; | |
6e81c74c | 1604 | char sbuf[STRERR_BUFSIZE], *emsg = strerror_r(err, sbuf, sizeof(sbuf)); |
a8f23d8f ACM |
1605 | |
1606 | switch (err) { | |
1607 | case EACCES: | |
1608 | case EPERM: | |
1609 | printed = scnprintf(buf, size, | |
1610 | "Error:\t%s.\n" | |
1611 | "Hint:\tCheck /proc/sys/kernel/perf_event_paranoid setting.", emsg); | |
1612 | ||
1a47245d | 1613 | value = perf_event_paranoid(); |
a8f23d8f ACM |
1614 | |
1615 | printed += scnprintf(buf + printed, size - printed, "\nHint:\t"); | |
1616 | ||
1617 | if (value >= 2) { | |
1618 | printed += scnprintf(buf + printed, size - printed, | |
1619 | "For your workloads it needs to be <= 1\nHint:\t"); | |
1620 | } | |
1621 | printed += scnprintf(buf + printed, size - printed, | |
5229e366 | 1622 | "For system wide tracing it needs to be set to -1.\n"); |
a8f23d8f ACM |
1623 | |
1624 | printed += scnprintf(buf + printed, size - printed, | |
5229e366 ACM |
1625 | "Hint:\tTry: 'sudo sh -c \"echo -1 > /proc/sys/kernel/perf_event_paranoid\"'\n" |
1626 | "Hint:\tThe current value is %d.", value); | |
a8f23d8f ACM |
1627 | break; |
1628 | default: | |
1629 | scnprintf(buf, size, "%s", emsg); | |
1630 | break; | |
1631 | } | |
1632 | ||
1633 | return 0; | |
1634 | } | |
a025e4f0 | 1635 | |
956fa571 ACM |
1636 | int perf_evlist__strerror_mmap(struct perf_evlist *evlist, int err, char *buf, size_t size) |
1637 | { | |
1638 | char sbuf[STRERR_BUFSIZE], *emsg = strerror_r(err, sbuf, sizeof(sbuf)); | |
e965bea1 | 1639 | int pages_attempted = evlist->mmap_len / 1024, pages_max_per_user, printed = 0; |
956fa571 ACM |
1640 | |
1641 | switch (err) { | |
1642 | case EPERM: | |
e5d4a290 | 1643 | sysctl__read_int("kernel/perf_event_mlock_kb", &pages_max_per_user); |
e965bea1 ACM |
1644 | printed += scnprintf(buf + printed, size - printed, |
1645 | "Error:\t%s.\n" | |
956fa571 | 1646 | "Hint:\tCheck /proc/sys/kernel/perf_event_mlock_kb (%d kB) setting.\n" |
e965bea1 | 1647 | "Hint:\tTried using %zd kB.\n", |
e5d4a290 | 1648 | emsg, pages_max_per_user, pages_attempted); |
e965bea1 ACM |
1649 | |
1650 | if (pages_attempted >= pages_max_per_user) { | |
1651 | printed += scnprintf(buf + printed, size - printed, | |
1652 | "Hint:\tTry 'sudo sh -c \"echo %d > /proc/sys/kernel/perf_event_mlock_kb\"', or\n", | |
1653 | pages_max_per_user + pages_attempted); | |
1654 | } | |
1655 | ||
1656 | printed += scnprintf(buf + printed, size - printed, | |
1657 | "Hint:\tTry using a smaller -m/--mmap-pages value."); | |
956fa571 ACM |
1658 | break; |
1659 | default: | |
1660 | scnprintf(buf, size, "%s", emsg); | |
1661 | break; | |
1662 | } | |
1663 | ||
1664 | return 0; | |
1665 | } | |
1666 | ||
a025e4f0 AH |
1667 | void perf_evlist__to_front(struct perf_evlist *evlist, |
1668 | struct perf_evsel *move_evsel) | |
1669 | { | |
1670 | struct perf_evsel *evsel, *n; | |
1671 | LIST_HEAD(move); | |
1672 | ||
1673 | if (move_evsel == perf_evlist__first(evlist)) | |
1674 | return; | |
1675 | ||
0050f7aa | 1676 | evlist__for_each_safe(evlist, n, evsel) { |
a025e4f0 AH |
1677 | if (evsel->leader == move_evsel->leader) |
1678 | list_move_tail(&evsel->node, &move); | |
1679 | } | |
1680 | ||
1681 | list_splice(&move, &evlist->entries); | |
1682 | } | |
60b0896c AH |
1683 | |
1684 | void perf_evlist__set_tracking_event(struct perf_evlist *evlist, | |
1685 | struct perf_evsel *tracking_evsel) | |
1686 | { | |
1687 | struct perf_evsel *evsel; | |
1688 | ||
1689 | if (tracking_evsel->tracking) | |
1690 | return; | |
1691 | ||
1692 | evlist__for_each(evlist, evsel) { | |
1693 | if (evsel != tracking_evsel) | |
1694 | evsel->tracking = false; | |
1695 | } | |
1696 | ||
1697 | tracking_evsel->tracking = true; | |
1698 | } |