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Commit | Line | Data |
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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" |
553873e1 | 10 | #include <api/fs/debugfs.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> | |
27 | ||
e4b356b5 ACM |
28 | static void perf_evlist__mmap_put(struct perf_evlist *evlist, int idx); |
29 | static void __perf_evlist__munmap(struct perf_evlist *evlist, int idx); | |
30 | ||
f8a95309 | 31 | #define FD(e, x, y) (*(int *)xyarray__entry(e->fd, x, y)) |
a91e5431 | 32 | #define SID(e, x, y) xyarray__entry(e->sample_id, x, y) |
f8a95309 | 33 | |
7e2ed097 ACM |
34 | void perf_evlist__init(struct perf_evlist *evlist, struct cpu_map *cpus, |
35 | struct thread_map *threads) | |
ef1d1af2 ACM |
36 | { |
37 | int i; | |
38 | ||
39 | for (i = 0; i < PERF_EVLIST__HLIST_SIZE; ++i) | |
40 | INIT_HLIST_HEAD(&evlist->heads[i]); | |
41 | INIT_LIST_HEAD(&evlist->entries); | |
7e2ed097 | 42 | perf_evlist__set_maps(evlist, cpus, threads); |
1b85337d | 43 | fdarray__init(&evlist->pollfd, 64); |
35b9d88e | 44 | evlist->workload.pid = -1; |
ef1d1af2 ACM |
45 | } |
46 | ||
334fe7a3 | 47 | struct perf_evlist *perf_evlist__new(void) |
361c99a6 ACM |
48 | { |
49 | struct perf_evlist *evlist = zalloc(sizeof(*evlist)); | |
50 | ||
ef1d1af2 | 51 | if (evlist != NULL) |
334fe7a3 | 52 | perf_evlist__init(evlist, NULL, NULL); |
361c99a6 ACM |
53 | |
54 | return evlist; | |
55 | } | |
56 | ||
b22d54b0 JO |
57 | struct perf_evlist *perf_evlist__new_default(void) |
58 | { | |
59 | struct perf_evlist *evlist = perf_evlist__new(); | |
60 | ||
61 | if (evlist && perf_evlist__add_default(evlist)) { | |
62 | perf_evlist__delete(evlist); | |
63 | evlist = NULL; | |
64 | } | |
65 | ||
66 | return evlist; | |
67 | } | |
68 | ||
75562573 AH |
69 | /** |
70 | * perf_evlist__set_id_pos - set the positions of event ids. | |
71 | * @evlist: selected event list | |
72 | * | |
73 | * Events with compatible sample types all have the same id_pos | |
74 | * and is_pos. For convenience, put a copy on evlist. | |
75 | */ | |
76 | void perf_evlist__set_id_pos(struct perf_evlist *evlist) | |
77 | { | |
78 | struct perf_evsel *first = perf_evlist__first(evlist); | |
79 | ||
80 | evlist->id_pos = first->id_pos; | |
81 | evlist->is_pos = first->is_pos; | |
82 | } | |
83 | ||
733cd2fe AH |
84 | static void perf_evlist__update_id_pos(struct perf_evlist *evlist) |
85 | { | |
86 | struct perf_evsel *evsel; | |
87 | ||
0050f7aa | 88 | evlist__for_each(evlist, evsel) |
733cd2fe AH |
89 | perf_evsel__calc_id_pos(evsel); |
90 | ||
91 | perf_evlist__set_id_pos(evlist); | |
92 | } | |
93 | ||
361c99a6 ACM |
94 | static void perf_evlist__purge(struct perf_evlist *evlist) |
95 | { | |
96 | struct perf_evsel *pos, *n; | |
97 | ||
0050f7aa | 98 | evlist__for_each_safe(evlist, n, pos) { |
361c99a6 ACM |
99 | list_del_init(&pos->node); |
100 | perf_evsel__delete(pos); | |
101 | } | |
102 | ||
103 | evlist->nr_entries = 0; | |
104 | } | |
105 | ||
ef1d1af2 | 106 | void perf_evlist__exit(struct perf_evlist *evlist) |
361c99a6 | 107 | { |
04662523 | 108 | zfree(&evlist->mmap); |
1b85337d | 109 | fdarray__exit(&evlist->pollfd); |
ef1d1af2 ACM |
110 | } |
111 | ||
112 | void perf_evlist__delete(struct perf_evlist *evlist) | |
113 | { | |
983874d1 | 114 | perf_evlist__munmap(evlist); |
f26e1c7c | 115 | perf_evlist__close(evlist); |
03ad9747 ACM |
116 | cpu_map__delete(evlist->cpus); |
117 | thread_map__delete(evlist->threads); | |
118 | evlist->cpus = NULL; | |
119 | evlist->threads = NULL; | |
ef1d1af2 ACM |
120 | perf_evlist__purge(evlist); |
121 | perf_evlist__exit(evlist); | |
361c99a6 ACM |
122 | free(evlist); |
123 | } | |
124 | ||
125 | void perf_evlist__add(struct perf_evlist *evlist, struct perf_evsel *entry) | |
126 | { | |
127 | list_add_tail(&entry->node, &evlist->entries); | |
ef503831 | 128 | entry->idx = evlist->nr_entries; |
60b0896c | 129 | entry->tracking = !entry->idx; |
ef503831 | 130 | |
75562573 AH |
131 | if (!evlist->nr_entries++) |
132 | perf_evlist__set_id_pos(evlist); | |
361c99a6 ACM |
133 | } |
134 | ||
0529bc1f JO |
135 | void perf_evlist__splice_list_tail(struct perf_evlist *evlist, |
136 | struct list_head *list, | |
137 | int nr_entries) | |
50d08e47 | 138 | { |
75562573 AH |
139 | bool set_id_pos = !evlist->nr_entries; |
140 | ||
50d08e47 ACM |
141 | list_splice_tail(list, &evlist->entries); |
142 | evlist->nr_entries += nr_entries; | |
75562573 AH |
143 | if (set_id_pos) |
144 | perf_evlist__set_id_pos(evlist); | |
50d08e47 ACM |
145 | } |
146 | ||
63dab225 ACM |
147 | void __perf_evlist__set_leader(struct list_head *list) |
148 | { | |
149 | struct perf_evsel *evsel, *leader; | |
150 | ||
151 | leader = list_entry(list->next, struct perf_evsel, node); | |
97f63e4a NK |
152 | evsel = list_entry(list->prev, struct perf_evsel, node); |
153 | ||
154 | leader->nr_members = evsel->idx - leader->idx + 1; | |
63dab225 | 155 | |
0050f7aa | 156 | __evlist__for_each(list, evsel) { |
74b2133d | 157 | evsel->leader = leader; |
63dab225 ACM |
158 | } |
159 | } | |
160 | ||
161 | void perf_evlist__set_leader(struct perf_evlist *evlist) | |
6a4bb04c | 162 | { |
97f63e4a NK |
163 | if (evlist->nr_entries) { |
164 | evlist->nr_groups = evlist->nr_entries > 1 ? 1 : 0; | |
63dab225 | 165 | __perf_evlist__set_leader(&evlist->entries); |
97f63e4a | 166 | } |
6a4bb04c JO |
167 | } |
168 | ||
361c99a6 ACM |
169 | int perf_evlist__add_default(struct perf_evlist *evlist) |
170 | { | |
171 | struct perf_event_attr attr = { | |
172 | .type = PERF_TYPE_HARDWARE, | |
173 | .config = PERF_COUNT_HW_CPU_CYCLES, | |
174 | }; | |
1aed2671 JR |
175 | struct perf_evsel *evsel; |
176 | ||
177 | event_attr_init(&attr); | |
361c99a6 | 178 | |
ef503831 | 179 | evsel = perf_evsel__new(&attr); |
361c99a6 | 180 | if (evsel == NULL) |
cc2d86b0 SE |
181 | goto error; |
182 | ||
183 | /* use strdup() because free(evsel) assumes name is allocated */ | |
184 | evsel->name = strdup("cycles"); | |
185 | if (!evsel->name) | |
186 | goto error_free; | |
361c99a6 ACM |
187 | |
188 | perf_evlist__add(evlist, evsel); | |
189 | return 0; | |
cc2d86b0 SE |
190 | error_free: |
191 | perf_evsel__delete(evsel); | |
192 | error: | |
193 | return -ENOMEM; | |
361c99a6 | 194 | } |
5c581041 | 195 | |
e60fc847 ACM |
196 | static int perf_evlist__add_attrs(struct perf_evlist *evlist, |
197 | struct perf_event_attr *attrs, size_t nr_attrs) | |
50d08e47 ACM |
198 | { |
199 | struct perf_evsel *evsel, *n; | |
200 | LIST_HEAD(head); | |
201 | size_t i; | |
202 | ||
203 | for (i = 0; i < nr_attrs; i++) { | |
ef503831 | 204 | evsel = perf_evsel__new_idx(attrs + i, evlist->nr_entries + i); |
50d08e47 ACM |
205 | if (evsel == NULL) |
206 | goto out_delete_partial_list; | |
207 | list_add_tail(&evsel->node, &head); | |
208 | } | |
209 | ||
210 | perf_evlist__splice_list_tail(evlist, &head, nr_attrs); | |
211 | ||
212 | return 0; | |
213 | ||
214 | out_delete_partial_list: | |
0050f7aa | 215 | __evlist__for_each_safe(&head, n, evsel) |
50d08e47 ACM |
216 | perf_evsel__delete(evsel); |
217 | return -1; | |
218 | } | |
219 | ||
79695e1b ACM |
220 | int __perf_evlist__add_default_attrs(struct perf_evlist *evlist, |
221 | struct perf_event_attr *attrs, size_t nr_attrs) | |
222 | { | |
223 | size_t i; | |
224 | ||
225 | for (i = 0; i < nr_attrs; i++) | |
226 | event_attr_init(attrs + i); | |
227 | ||
228 | return perf_evlist__add_attrs(evlist, attrs, nr_attrs); | |
229 | } | |
230 | ||
da378962 ACM |
231 | struct perf_evsel * |
232 | perf_evlist__find_tracepoint_by_id(struct perf_evlist *evlist, int id) | |
ee29be62 ACM |
233 | { |
234 | struct perf_evsel *evsel; | |
235 | ||
0050f7aa | 236 | evlist__for_each(evlist, evsel) { |
ee29be62 ACM |
237 | if (evsel->attr.type == PERF_TYPE_TRACEPOINT && |
238 | (int)evsel->attr.config == id) | |
239 | return evsel; | |
240 | } | |
241 | ||
242 | return NULL; | |
243 | } | |
244 | ||
a2f2804a DA |
245 | struct perf_evsel * |
246 | perf_evlist__find_tracepoint_by_name(struct perf_evlist *evlist, | |
247 | const char *name) | |
248 | { | |
249 | struct perf_evsel *evsel; | |
250 | ||
0050f7aa | 251 | evlist__for_each(evlist, evsel) { |
a2f2804a DA |
252 | if ((evsel->attr.type == PERF_TYPE_TRACEPOINT) && |
253 | (strcmp(evsel->name, name) == 0)) | |
254 | return evsel; | |
255 | } | |
256 | ||
257 | return NULL; | |
258 | } | |
259 | ||
39876e7d ACM |
260 | int perf_evlist__add_newtp(struct perf_evlist *evlist, |
261 | const char *sys, const char *name, void *handler) | |
262 | { | |
ef503831 | 263 | struct perf_evsel *evsel = perf_evsel__newtp(sys, name); |
39876e7d | 264 | |
39876e7d ACM |
265 | if (evsel == NULL) |
266 | return -1; | |
267 | ||
744a9719 | 268 | evsel->handler = handler; |
39876e7d ACM |
269 | perf_evlist__add(evlist, evsel); |
270 | return 0; | |
271 | } | |
272 | ||
bf8e8f4b AH |
273 | static int perf_evlist__nr_threads(struct perf_evlist *evlist, |
274 | struct perf_evsel *evsel) | |
275 | { | |
276 | if (evsel->system_wide) | |
277 | return 1; | |
278 | else | |
279 | return thread_map__nr(evlist->threads); | |
280 | } | |
281 | ||
4152ab37 ACM |
282 | void perf_evlist__disable(struct perf_evlist *evlist) |
283 | { | |
284 | int cpu, thread; | |
285 | struct perf_evsel *pos; | |
b3a319d5 | 286 | int nr_cpus = cpu_map__nr(evlist->cpus); |
bf8e8f4b | 287 | int nr_threads; |
4152ab37 | 288 | |
b3a319d5 | 289 | for (cpu = 0; cpu < nr_cpus; cpu++) { |
0050f7aa | 290 | evlist__for_each(evlist, pos) { |
395c3070 | 291 | if (!perf_evsel__is_group_leader(pos) || !pos->fd) |
3fe4430d | 292 | continue; |
bf8e8f4b | 293 | nr_threads = perf_evlist__nr_threads(evlist, pos); |
b3a319d5 | 294 | for (thread = 0; thread < nr_threads; thread++) |
55da8005 NK |
295 | ioctl(FD(pos, cpu, thread), |
296 | PERF_EVENT_IOC_DISABLE, 0); | |
4152ab37 ACM |
297 | } |
298 | } | |
299 | } | |
300 | ||
764e16a3 DA |
301 | void perf_evlist__enable(struct perf_evlist *evlist) |
302 | { | |
303 | int cpu, thread; | |
304 | struct perf_evsel *pos; | |
b3a319d5 | 305 | int nr_cpus = cpu_map__nr(evlist->cpus); |
bf8e8f4b | 306 | int nr_threads; |
764e16a3 | 307 | |
b3a319d5 | 308 | for (cpu = 0; cpu < nr_cpus; cpu++) { |
0050f7aa | 309 | evlist__for_each(evlist, pos) { |
395c3070 | 310 | if (!perf_evsel__is_group_leader(pos) || !pos->fd) |
3fe4430d | 311 | continue; |
bf8e8f4b | 312 | nr_threads = perf_evlist__nr_threads(evlist, pos); |
b3a319d5 | 313 | for (thread = 0; thread < nr_threads; thread++) |
55da8005 NK |
314 | ioctl(FD(pos, cpu, thread), |
315 | PERF_EVENT_IOC_ENABLE, 0); | |
764e16a3 DA |
316 | } |
317 | } | |
318 | } | |
319 | ||
395c3070 AH |
320 | int perf_evlist__disable_event(struct perf_evlist *evlist, |
321 | struct perf_evsel *evsel) | |
322 | { | |
323 | int cpu, thread, err; | |
bf8e8f4b AH |
324 | int nr_cpus = cpu_map__nr(evlist->cpus); |
325 | int nr_threads = perf_evlist__nr_threads(evlist, evsel); | |
395c3070 AH |
326 | |
327 | if (!evsel->fd) | |
328 | return 0; | |
329 | ||
bf8e8f4b AH |
330 | for (cpu = 0; cpu < nr_cpus; cpu++) { |
331 | for (thread = 0; thread < nr_threads; thread++) { | |
395c3070 AH |
332 | err = ioctl(FD(evsel, cpu, thread), |
333 | PERF_EVENT_IOC_DISABLE, 0); | |
334 | if (err) | |
335 | return err; | |
336 | } | |
337 | } | |
338 | return 0; | |
339 | } | |
340 | ||
341 | int perf_evlist__enable_event(struct perf_evlist *evlist, | |
342 | struct perf_evsel *evsel) | |
343 | { | |
344 | int cpu, thread, err; | |
bf8e8f4b AH |
345 | int nr_cpus = cpu_map__nr(evlist->cpus); |
346 | int nr_threads = perf_evlist__nr_threads(evlist, evsel); | |
395c3070 AH |
347 | |
348 | if (!evsel->fd) | |
349 | return -EINVAL; | |
350 | ||
bf8e8f4b AH |
351 | for (cpu = 0; cpu < nr_cpus; cpu++) { |
352 | for (thread = 0; thread < nr_threads; thread++) { | |
395c3070 AH |
353 | err = ioctl(FD(evsel, cpu, thread), |
354 | PERF_EVENT_IOC_ENABLE, 0); | |
355 | if (err) | |
356 | return err; | |
357 | } | |
358 | } | |
359 | return 0; | |
360 | } | |
361 | ||
1c65056c AH |
362 | static int perf_evlist__enable_event_cpu(struct perf_evlist *evlist, |
363 | struct perf_evsel *evsel, int cpu) | |
364 | { | |
365 | int thread, err; | |
366 | int nr_threads = perf_evlist__nr_threads(evlist, evsel); | |
367 | ||
368 | if (!evsel->fd) | |
369 | return -EINVAL; | |
370 | ||
371 | for (thread = 0; thread < nr_threads; thread++) { | |
372 | err = ioctl(FD(evsel, cpu, thread), | |
373 | PERF_EVENT_IOC_ENABLE, 0); | |
374 | if (err) | |
375 | return err; | |
376 | } | |
377 | return 0; | |
378 | } | |
379 | ||
380 | static int perf_evlist__enable_event_thread(struct perf_evlist *evlist, | |
381 | struct perf_evsel *evsel, | |
382 | int thread) | |
383 | { | |
384 | int cpu, err; | |
385 | int nr_cpus = cpu_map__nr(evlist->cpus); | |
386 | ||
387 | if (!evsel->fd) | |
388 | return -EINVAL; | |
389 | ||
390 | for (cpu = 0; cpu < nr_cpus; cpu++) { | |
391 | err = ioctl(FD(evsel, cpu, thread), PERF_EVENT_IOC_ENABLE, 0); | |
392 | if (err) | |
393 | return err; | |
394 | } | |
395 | return 0; | |
396 | } | |
397 | ||
398 | int perf_evlist__enable_event_idx(struct perf_evlist *evlist, | |
399 | struct perf_evsel *evsel, int idx) | |
400 | { | |
401 | bool per_cpu_mmaps = !cpu_map__empty(evlist->cpus); | |
402 | ||
403 | if (per_cpu_mmaps) | |
404 | return perf_evlist__enable_event_cpu(evlist, evsel, idx); | |
405 | else | |
406 | return perf_evlist__enable_event_thread(evlist, evsel, idx); | |
407 | } | |
408 | ||
ad6765dd | 409 | int perf_evlist__alloc_pollfd(struct perf_evlist *evlist) |
5c581041 | 410 | { |
b3a319d5 NK |
411 | int nr_cpus = cpu_map__nr(evlist->cpus); |
412 | int nr_threads = thread_map__nr(evlist->threads); | |
bf8e8f4b AH |
413 | int nfds = 0; |
414 | struct perf_evsel *evsel; | |
415 | ||
416 | list_for_each_entry(evsel, &evlist->entries, node) { | |
417 | if (evsel->system_wide) | |
418 | nfds += nr_cpus; | |
419 | else | |
420 | nfds += nr_cpus * nr_threads; | |
421 | } | |
422 | ||
1b85337d ACM |
423 | if (fdarray__available_entries(&evlist->pollfd) < nfds && |
424 | fdarray__grow(&evlist->pollfd, nfds) < 0) | |
ad6765dd ACM |
425 | return -ENOMEM; |
426 | ||
427 | return 0; | |
5c581041 | 428 | } |
70082dd9 | 429 | |
e4b356b5 ACM |
430 | static int __perf_evlist__add_pollfd(struct perf_evlist *evlist, int fd, int idx) |
431 | { | |
432 | int pos = fdarray__add(&evlist->pollfd, fd, POLLIN | POLLERR | POLLHUP); | |
433 | /* | |
434 | * Save the idx so that when we filter out fds POLLHUP'ed we can | |
435 | * close the associated evlist->mmap[] entry. | |
436 | */ | |
437 | if (pos >= 0) { | |
438 | evlist->pollfd.priv[pos].idx = idx; | |
439 | ||
440 | fcntl(fd, F_SETFL, O_NONBLOCK); | |
441 | } | |
442 | ||
443 | return pos; | |
444 | } | |
445 | ||
ad6765dd | 446 | int perf_evlist__add_pollfd(struct perf_evlist *evlist, int fd) |
70082dd9 | 447 | { |
e4b356b5 ACM |
448 | return __perf_evlist__add_pollfd(evlist, fd, -1); |
449 | } | |
450 | ||
451 | static void perf_evlist__munmap_filtered(struct fdarray *fda, int fd) | |
452 | { | |
453 | struct perf_evlist *evlist = container_of(fda, struct perf_evlist, pollfd); | |
1b85337d | 454 | |
e4b356b5 | 455 | perf_evlist__mmap_put(evlist, fda->priv[fd].idx); |
70082dd9 | 456 | } |
70db7533 | 457 | |
1ddec7f0 ACM |
458 | int perf_evlist__filter_pollfd(struct perf_evlist *evlist, short revents_and_mask) |
459 | { | |
e4b356b5 ACM |
460 | return fdarray__filter(&evlist->pollfd, revents_and_mask, |
461 | perf_evlist__munmap_filtered); | |
1ddec7f0 ACM |
462 | } |
463 | ||
f66a889d ACM |
464 | int perf_evlist__poll(struct perf_evlist *evlist, int timeout) |
465 | { | |
1b85337d | 466 | return fdarray__poll(&evlist->pollfd, timeout); |
f66a889d ACM |
467 | } |
468 | ||
a91e5431 ACM |
469 | static void perf_evlist__id_hash(struct perf_evlist *evlist, |
470 | struct perf_evsel *evsel, | |
471 | int cpu, int thread, u64 id) | |
3d3b5e95 ACM |
472 | { |
473 | int hash; | |
474 | struct perf_sample_id *sid = SID(evsel, cpu, thread); | |
475 | ||
476 | sid->id = id; | |
477 | sid->evsel = evsel; | |
478 | hash = hash_64(sid->id, PERF_EVLIST__HLIST_BITS); | |
479 | hlist_add_head(&sid->node, &evlist->heads[hash]); | |
480 | } | |
481 | ||
a91e5431 ACM |
482 | void perf_evlist__id_add(struct perf_evlist *evlist, struct perf_evsel *evsel, |
483 | int cpu, int thread, u64 id) | |
484 | { | |
485 | perf_evlist__id_hash(evlist, evsel, cpu, thread, id); | |
486 | evsel->id[evsel->ids++] = id; | |
487 | } | |
488 | ||
489 | static int perf_evlist__id_add_fd(struct perf_evlist *evlist, | |
490 | struct perf_evsel *evsel, | |
491 | int cpu, int thread, int fd) | |
f8a95309 | 492 | { |
f8a95309 | 493 | u64 read_data[4] = { 0, }; |
3d3b5e95 | 494 | int id_idx = 1; /* The first entry is the counter value */ |
e2b5abe0 JO |
495 | u64 id; |
496 | int ret; | |
497 | ||
498 | ret = ioctl(fd, PERF_EVENT_IOC_ID, &id); | |
499 | if (!ret) | |
500 | goto add; | |
501 | ||
502 | if (errno != ENOTTY) | |
503 | return -1; | |
504 | ||
505 | /* Legacy way to get event id.. All hail to old kernels! */ | |
f8a95309 | 506 | |
c4861afe JO |
507 | /* |
508 | * This way does not work with group format read, so bail | |
509 | * out in that case. | |
510 | */ | |
511 | if (perf_evlist__read_format(evlist) & PERF_FORMAT_GROUP) | |
512 | return -1; | |
513 | ||
f8a95309 ACM |
514 | if (!(evsel->attr.read_format & PERF_FORMAT_ID) || |
515 | read(fd, &read_data, sizeof(read_data)) == -1) | |
516 | return -1; | |
517 | ||
518 | if (evsel->attr.read_format & PERF_FORMAT_TOTAL_TIME_ENABLED) | |
519 | ++id_idx; | |
520 | if (evsel->attr.read_format & PERF_FORMAT_TOTAL_TIME_RUNNING) | |
521 | ++id_idx; | |
522 | ||
e2b5abe0 JO |
523 | id = read_data[id_idx]; |
524 | ||
525 | add: | |
526 | perf_evlist__id_add(evlist, evsel, cpu, thread, id); | |
f8a95309 ACM |
527 | return 0; |
528 | } | |
529 | ||
932a3594 | 530 | struct perf_sample_id *perf_evlist__id2sid(struct perf_evlist *evlist, u64 id) |
70db7533 ACM |
531 | { |
532 | struct hlist_head *head; | |
70db7533 ACM |
533 | struct perf_sample_id *sid; |
534 | int hash; | |
535 | ||
70db7533 ACM |
536 | hash = hash_64(id, PERF_EVLIST__HLIST_BITS); |
537 | head = &evlist->heads[hash]; | |
538 | ||
b67bfe0d | 539 | hlist_for_each_entry(sid, head, node) |
70db7533 | 540 | if (sid->id == id) |
932a3594 JO |
541 | return sid; |
542 | ||
543 | return NULL; | |
544 | } | |
545 | ||
546 | struct perf_evsel *perf_evlist__id2evsel(struct perf_evlist *evlist, u64 id) | |
547 | { | |
548 | struct perf_sample_id *sid; | |
549 | ||
550 | if (evlist->nr_entries == 1) | |
551 | return perf_evlist__first(evlist); | |
552 | ||
553 | sid = perf_evlist__id2sid(evlist, id); | |
554 | if (sid) | |
555 | return sid->evsel; | |
30e68bcc NK |
556 | |
557 | if (!perf_evlist__sample_id_all(evlist)) | |
0c21f736 | 558 | return perf_evlist__first(evlist); |
30e68bcc | 559 | |
70db7533 ACM |
560 | return NULL; |
561 | } | |
04391deb | 562 | |
75562573 AH |
563 | static int perf_evlist__event2id(struct perf_evlist *evlist, |
564 | union perf_event *event, u64 *id) | |
565 | { | |
566 | const u64 *array = event->sample.array; | |
567 | ssize_t n; | |
568 | ||
569 | n = (event->header.size - sizeof(event->header)) >> 3; | |
570 | ||
571 | if (event->header.type == PERF_RECORD_SAMPLE) { | |
572 | if (evlist->id_pos >= n) | |
573 | return -1; | |
574 | *id = array[evlist->id_pos]; | |
575 | } else { | |
576 | if (evlist->is_pos > n) | |
577 | return -1; | |
578 | n -= evlist->is_pos; | |
579 | *id = array[n]; | |
580 | } | |
581 | return 0; | |
582 | } | |
583 | ||
584 | static struct perf_evsel *perf_evlist__event2evsel(struct perf_evlist *evlist, | |
585 | union perf_event *event) | |
586 | { | |
98be6966 | 587 | struct perf_evsel *first = perf_evlist__first(evlist); |
75562573 AH |
588 | struct hlist_head *head; |
589 | struct perf_sample_id *sid; | |
590 | int hash; | |
591 | u64 id; | |
592 | ||
593 | if (evlist->nr_entries == 1) | |
98be6966 AH |
594 | return first; |
595 | ||
596 | if (!first->attr.sample_id_all && | |
597 | event->header.type != PERF_RECORD_SAMPLE) | |
598 | return first; | |
75562573 AH |
599 | |
600 | if (perf_evlist__event2id(evlist, event, &id)) | |
601 | return NULL; | |
602 | ||
603 | /* Synthesized events have an id of zero */ | |
604 | if (!id) | |
98be6966 | 605 | return first; |
75562573 AH |
606 | |
607 | hash = hash_64(id, PERF_EVLIST__HLIST_BITS); | |
608 | head = &evlist->heads[hash]; | |
609 | ||
610 | hlist_for_each_entry(sid, head, node) { | |
611 | if (sid->id == id) | |
612 | return sid->evsel; | |
613 | } | |
614 | return NULL; | |
615 | } | |
616 | ||
aece948f | 617 | union perf_event *perf_evlist__mmap_read(struct perf_evlist *evlist, int idx) |
04391deb | 618 | { |
aece948f | 619 | struct perf_mmap *md = &evlist->mmap[idx]; |
04391deb ACM |
620 | unsigned int head = perf_mmap__read_head(md); |
621 | unsigned int old = md->prev; | |
622 | unsigned char *data = md->base + page_size; | |
8115d60c | 623 | union perf_event *event = NULL; |
04391deb | 624 | |
7bb41152 | 625 | if (evlist->overwrite) { |
04391deb | 626 | /* |
7bb41152 ACM |
627 | * If we're further behind than half the buffer, there's a chance |
628 | * the writer will bite our tail and mess up the samples under us. | |
629 | * | |
630 | * If we somehow ended up ahead of the head, we got messed up. | |
631 | * | |
632 | * In either case, truncate and restart at head. | |
04391deb | 633 | */ |
7bb41152 ACM |
634 | int diff = head - old; |
635 | if (diff > md->mask / 2 || diff < 0) { | |
636 | fprintf(stderr, "WARNING: failed to keep up with mmap data.\n"); | |
637 | ||
638 | /* | |
639 | * head points to a known good entry, start there. | |
640 | */ | |
641 | old = head; | |
642 | } | |
04391deb ACM |
643 | } |
644 | ||
645 | if (old != head) { | |
646 | size_t size; | |
647 | ||
8115d60c | 648 | event = (union perf_event *)&data[old & md->mask]; |
04391deb ACM |
649 | size = event->header.size; |
650 | ||
651 | /* | |
652 | * Event straddles the mmap boundary -- header should always | |
653 | * be inside due to u64 alignment of output. | |
654 | */ | |
655 | if ((old & md->mask) + size != ((old + size) & md->mask)) { | |
656 | unsigned int offset = old; | |
657 | unsigned int len = min(sizeof(*event), size), cpy; | |
a65cb4b9 | 658 | void *dst = md->event_copy; |
04391deb ACM |
659 | |
660 | do { | |
661 | cpy = min(md->mask + 1 - (offset & md->mask), len); | |
662 | memcpy(dst, &data[offset & md->mask], cpy); | |
663 | offset += cpy; | |
664 | dst += cpy; | |
665 | len -= cpy; | |
666 | } while (len); | |
667 | ||
a65cb4b9 | 668 | event = (union perf_event *) md->event_copy; |
04391deb ACM |
669 | } |
670 | ||
671 | old += size; | |
672 | } | |
673 | ||
674 | md->prev = old; | |
7bb41152 | 675 | |
04391deb ACM |
676 | return event; |
677 | } | |
f8a95309 | 678 | |
82396986 ACM |
679 | static bool perf_mmap__empty(struct perf_mmap *md) |
680 | { | |
681 | return perf_mmap__read_head(md) != md->prev; | |
682 | } | |
683 | ||
684 | static void perf_evlist__mmap_get(struct perf_evlist *evlist, int idx) | |
685 | { | |
686 | ++evlist->mmap[idx].refcnt; | |
687 | } | |
688 | ||
689 | static void perf_evlist__mmap_put(struct perf_evlist *evlist, int idx) | |
690 | { | |
691 | BUG_ON(evlist->mmap[idx].refcnt == 0); | |
692 | ||
693 | if (--evlist->mmap[idx].refcnt == 0) | |
694 | __perf_evlist__munmap(evlist, idx); | |
695 | } | |
696 | ||
8e50d384 ZZ |
697 | void perf_evlist__mmap_consume(struct perf_evlist *evlist, int idx) |
698 | { | |
82396986 ACM |
699 | struct perf_mmap *md = &evlist->mmap[idx]; |
700 | ||
8e50d384 | 701 | if (!evlist->overwrite) { |
8e50d384 ZZ |
702 | unsigned int old = md->prev; |
703 | ||
704 | perf_mmap__write_tail(md, old); | |
705 | } | |
82396986 ACM |
706 | |
707 | if (md->refcnt == 1 && perf_mmap__empty(md)) | |
708 | perf_evlist__mmap_put(evlist, idx); | |
8e50d384 ZZ |
709 | } |
710 | ||
93edcbd9 AH |
711 | static void __perf_evlist__munmap(struct perf_evlist *evlist, int idx) |
712 | { | |
713 | if (evlist->mmap[idx].base != NULL) { | |
714 | munmap(evlist->mmap[idx].base, evlist->mmap_len); | |
715 | evlist->mmap[idx].base = NULL; | |
82396986 | 716 | evlist->mmap[idx].refcnt = 0; |
93edcbd9 AH |
717 | } |
718 | } | |
719 | ||
7e2ed097 | 720 | void perf_evlist__munmap(struct perf_evlist *evlist) |
f8a95309 | 721 | { |
aece948f | 722 | int i; |
f8a95309 | 723 | |
983874d1 ACM |
724 | if (evlist->mmap == NULL) |
725 | return; | |
726 | ||
93edcbd9 AH |
727 | for (i = 0; i < evlist->nr_mmaps; i++) |
728 | __perf_evlist__munmap(evlist, i); | |
aece948f | 729 | |
04662523 | 730 | zfree(&evlist->mmap); |
f8a95309 ACM |
731 | } |
732 | ||
806fb630 | 733 | static int perf_evlist__alloc_mmap(struct perf_evlist *evlist) |
f8a95309 | 734 | { |
a14bb7a6 | 735 | evlist->nr_mmaps = cpu_map__nr(evlist->cpus); |
ec1e7e43 | 736 | if (cpu_map__empty(evlist->cpus)) |
b3a319d5 | 737 | evlist->nr_mmaps = thread_map__nr(evlist->threads); |
aece948f | 738 | evlist->mmap = zalloc(evlist->nr_mmaps * sizeof(struct perf_mmap)); |
f8a95309 ACM |
739 | return evlist->mmap != NULL ? 0 : -ENOMEM; |
740 | } | |
741 | ||
a8a8f3eb AH |
742 | struct mmap_params { |
743 | int prot; | |
744 | int mask; | |
745 | }; | |
746 | ||
747 | static int __perf_evlist__mmap(struct perf_evlist *evlist, int idx, | |
748 | struct mmap_params *mp, int fd) | |
f8a95309 | 749 | { |
82396986 ACM |
750 | /* |
751 | * The last one will be done at perf_evlist__mmap_consume(), so that we | |
752 | * make sure we don't prevent tools from consuming every last event in | |
753 | * the ring buffer. | |
754 | * | |
755 | * I.e. we can get the POLLHUP meaning that the fd doesn't exist | |
756 | * anymore, but the last events for it are still in the ring buffer, | |
757 | * waiting to be consumed. | |
758 | * | |
759 | * Tools can chose to ignore this at their own discretion, but the | |
760 | * evlist layer can't just drop it when filtering events in | |
761 | * perf_evlist__filter_pollfd(). | |
762 | */ | |
763 | evlist->mmap[idx].refcnt = 2; | |
aece948f | 764 | evlist->mmap[idx].prev = 0; |
a8a8f3eb AH |
765 | evlist->mmap[idx].mask = mp->mask; |
766 | evlist->mmap[idx].base = mmap(NULL, evlist->mmap_len, mp->prot, | |
f8a95309 | 767 | MAP_SHARED, fd, 0); |
301b195d | 768 | if (evlist->mmap[idx].base == MAP_FAILED) { |
02635965 AH |
769 | pr_debug2("failed to mmap perf event ring buffer, error %d\n", |
770 | errno); | |
301b195d | 771 | evlist->mmap[idx].base = NULL; |
f8a95309 | 772 | return -1; |
301b195d | 773 | } |
ad6765dd | 774 | |
f8a95309 ACM |
775 | return 0; |
776 | } | |
777 | ||
04e21314 | 778 | static int perf_evlist__mmap_per_evsel(struct perf_evlist *evlist, int idx, |
a8a8f3eb AH |
779 | struct mmap_params *mp, int cpu, |
780 | int thread, int *output) | |
aece948f ACM |
781 | { |
782 | struct perf_evsel *evsel; | |
04e21314 | 783 | |
0050f7aa | 784 | evlist__for_each(evlist, evsel) { |
bf8e8f4b AH |
785 | int fd; |
786 | ||
787 | if (evsel->system_wide && thread) | |
788 | continue; | |
789 | ||
790 | fd = FD(evsel, cpu, thread); | |
04e21314 AH |
791 | |
792 | if (*output == -1) { | |
793 | *output = fd; | |
a8a8f3eb | 794 | if (__perf_evlist__mmap(evlist, idx, mp, *output) < 0) |
04e21314 AH |
795 | return -1; |
796 | } else { | |
797 | if (ioctl(fd, PERF_EVENT_IOC_SET_OUTPUT, *output) != 0) | |
798 | return -1; | |
82396986 ACM |
799 | |
800 | perf_evlist__mmap_get(evlist, idx); | |
04e21314 AH |
801 | } |
802 | ||
e4b356b5 | 803 | if (__perf_evlist__add_pollfd(evlist, fd, idx) < 0) { |
82396986 | 804 | perf_evlist__mmap_put(evlist, idx); |
ad6765dd | 805 | return -1; |
82396986 | 806 | } |
033fa713 | 807 | |
04e21314 AH |
808 | if ((evsel->attr.read_format & PERF_FORMAT_ID) && |
809 | perf_evlist__id_add_fd(evlist, evsel, cpu, thread, fd) < 0) | |
810 | return -1; | |
811 | } | |
812 | ||
813 | return 0; | |
814 | } | |
815 | ||
a8a8f3eb AH |
816 | static int perf_evlist__mmap_per_cpu(struct perf_evlist *evlist, |
817 | struct mmap_params *mp) | |
04e21314 | 818 | { |
aece948f | 819 | int cpu, thread; |
b3a319d5 NK |
820 | int nr_cpus = cpu_map__nr(evlist->cpus); |
821 | int nr_threads = thread_map__nr(evlist->threads); | |
aece948f | 822 | |
e3e1a54f | 823 | pr_debug2("perf event ring buffer mmapped per cpu\n"); |
b3a319d5 | 824 | for (cpu = 0; cpu < nr_cpus; cpu++) { |
aece948f ACM |
825 | int output = -1; |
826 | ||
b3a319d5 | 827 | for (thread = 0; thread < nr_threads; thread++) { |
a8a8f3eb AH |
828 | if (perf_evlist__mmap_per_evsel(evlist, cpu, mp, cpu, |
829 | thread, &output)) | |
04e21314 | 830 | goto out_unmap; |
aece948f ACM |
831 | } |
832 | } | |
833 | ||
834 | return 0; | |
835 | ||
836 | out_unmap: | |
93edcbd9 AH |
837 | for (cpu = 0; cpu < nr_cpus; cpu++) |
838 | __perf_evlist__munmap(evlist, cpu); | |
aece948f ACM |
839 | return -1; |
840 | } | |
841 | ||
a8a8f3eb AH |
842 | static int perf_evlist__mmap_per_thread(struct perf_evlist *evlist, |
843 | struct mmap_params *mp) | |
aece948f | 844 | { |
aece948f | 845 | int thread; |
b3a319d5 | 846 | int nr_threads = thread_map__nr(evlist->threads); |
aece948f | 847 | |
e3e1a54f | 848 | pr_debug2("perf event ring buffer mmapped per thread\n"); |
b3a319d5 | 849 | for (thread = 0; thread < nr_threads; thread++) { |
aece948f ACM |
850 | int output = -1; |
851 | ||
a8a8f3eb AH |
852 | if (perf_evlist__mmap_per_evsel(evlist, thread, mp, 0, thread, |
853 | &output)) | |
04e21314 | 854 | goto out_unmap; |
aece948f ACM |
855 | } |
856 | ||
857 | return 0; | |
858 | ||
859 | out_unmap: | |
93edcbd9 AH |
860 | for (thread = 0; thread < nr_threads; thread++) |
861 | __perf_evlist__munmap(evlist, thread); | |
aece948f ACM |
862 | return -1; |
863 | } | |
864 | ||
994a1f78 JO |
865 | static size_t perf_evlist__mmap_size(unsigned long pages) |
866 | { | |
867 | /* 512 kiB: default amount of unprivileged mlocked memory */ | |
868 | if (pages == UINT_MAX) | |
869 | pages = (512 * 1024) / page_size; | |
870 | else if (!is_power_of_2(pages)) | |
871 | return 0; | |
872 | ||
873 | return (pages + 1) * page_size; | |
874 | } | |
875 | ||
33c2dcfd DA |
876 | static long parse_pages_arg(const char *str, unsigned long min, |
877 | unsigned long max) | |
994a1f78 | 878 | { |
2fbe4abe | 879 | unsigned long pages, val; |
27050f53 JO |
880 | static struct parse_tag tags[] = { |
881 | { .tag = 'B', .mult = 1 }, | |
882 | { .tag = 'K', .mult = 1 << 10 }, | |
883 | { .tag = 'M', .mult = 1 << 20 }, | |
884 | { .tag = 'G', .mult = 1 << 30 }, | |
885 | { .tag = 0 }, | |
886 | }; | |
994a1f78 | 887 | |
8973504b | 888 | if (str == NULL) |
33c2dcfd | 889 | return -EINVAL; |
8973504b | 890 | |
27050f53 | 891 | val = parse_tag_value(str, tags); |
2fbe4abe | 892 | if (val != (unsigned long) -1) { |
27050f53 JO |
893 | /* we got file size value */ |
894 | pages = PERF_ALIGN(val, page_size) / page_size; | |
27050f53 JO |
895 | } else { |
896 | /* we got pages count value */ | |
897 | char *eptr; | |
898 | pages = strtoul(str, &eptr, 10); | |
33c2dcfd DA |
899 | if (*eptr != '\0') |
900 | return -EINVAL; | |
994a1f78 JO |
901 | } |
902 | ||
2bcab6c1 | 903 | if (pages == 0 && min == 0) { |
33c2dcfd | 904 | /* leave number of pages at 0 */ |
1dbfa938 | 905 | } else if (!is_power_of_2(pages)) { |
33c2dcfd | 906 | /* round pages up to next power of 2 */ |
1dbfa938 AH |
907 | pages = next_pow2_l(pages); |
908 | if (!pages) | |
909 | return -EINVAL; | |
9639837e DA |
910 | pr_info("rounding mmap pages size to %lu bytes (%lu pages)\n", |
911 | pages * page_size, pages); | |
2fbe4abe AH |
912 | } |
913 | ||
33c2dcfd DA |
914 | if (pages > max) |
915 | return -EINVAL; | |
916 | ||
917 | return pages; | |
918 | } | |
919 | ||
920 | int perf_evlist__parse_mmap_pages(const struct option *opt, const char *str, | |
921 | int unset __maybe_unused) | |
922 | { | |
923 | unsigned int *mmap_pages = opt->value; | |
924 | unsigned long max = UINT_MAX; | |
925 | long pages; | |
926 | ||
f5ae9c42 | 927 | if (max > SIZE_MAX / page_size) |
33c2dcfd DA |
928 | max = SIZE_MAX / page_size; |
929 | ||
930 | pages = parse_pages_arg(str, 1, max); | |
931 | if (pages < 0) { | |
932 | pr_err("Invalid argument for --mmap_pages/-m\n"); | |
994a1f78 JO |
933 | return -1; |
934 | } | |
935 | ||
936 | *mmap_pages = pages; | |
937 | return 0; | |
938 | } | |
939 | ||
c83fa7f2 AH |
940 | /** |
941 | * perf_evlist__mmap - Create mmaps to receive events. | |
942 | * @evlist: list of events | |
943 | * @pages: map length in pages | |
944 | * @overwrite: overwrite older events? | |
f8a95309 | 945 | * |
c83fa7f2 AH |
946 | * If @overwrite is %false the user needs to signal event consumption using |
947 | * perf_mmap__write_tail(). Using perf_evlist__mmap_read() does this | |
948 | * automatically. | |
7e2ed097 | 949 | * |
c83fa7f2 | 950 | * Return: %0 on success, negative error code otherwise. |
f8a95309 | 951 | */ |
50a682ce ACM |
952 | int perf_evlist__mmap(struct perf_evlist *evlist, unsigned int pages, |
953 | bool overwrite) | |
f8a95309 | 954 | { |
aece948f | 955 | struct perf_evsel *evsel; |
7e2ed097 ACM |
956 | const struct cpu_map *cpus = evlist->cpus; |
957 | const struct thread_map *threads = evlist->threads; | |
a8a8f3eb AH |
958 | struct mmap_params mp = { |
959 | .prot = PROT_READ | (overwrite ? 0 : PROT_WRITE), | |
960 | }; | |
50a682ce | 961 | |
7e2ed097 | 962 | if (evlist->mmap == NULL && perf_evlist__alloc_mmap(evlist) < 0) |
f8a95309 ACM |
963 | return -ENOMEM; |
964 | ||
1b85337d | 965 | if (evlist->pollfd.entries == NULL && perf_evlist__alloc_pollfd(evlist) < 0) |
f8a95309 ACM |
966 | return -ENOMEM; |
967 | ||
968 | evlist->overwrite = overwrite; | |
994a1f78 | 969 | evlist->mmap_len = perf_evlist__mmap_size(pages); |
2af68ef5 | 970 | pr_debug("mmap size %zuB\n", evlist->mmap_len); |
a8a8f3eb | 971 | mp.mask = evlist->mmap_len - page_size - 1; |
f8a95309 | 972 | |
0050f7aa | 973 | evlist__for_each(evlist, evsel) { |
f8a95309 | 974 | if ((evsel->attr.read_format & PERF_FORMAT_ID) && |
a91e5431 | 975 | evsel->sample_id == NULL && |
a14bb7a6 | 976 | perf_evsel__alloc_id(evsel, cpu_map__nr(cpus), threads->nr) < 0) |
f8a95309 | 977 | return -ENOMEM; |
f8a95309 ACM |
978 | } |
979 | ||
ec1e7e43 | 980 | if (cpu_map__empty(cpus)) |
a8a8f3eb | 981 | return perf_evlist__mmap_per_thread(evlist, &mp); |
f8a95309 | 982 | |
a8a8f3eb | 983 | return perf_evlist__mmap_per_cpu(evlist, &mp); |
f8a95309 | 984 | } |
7e2ed097 | 985 | |
602ad878 | 986 | int perf_evlist__create_maps(struct perf_evlist *evlist, struct target *target) |
7e2ed097 | 987 | { |
b809ac10 NK |
988 | evlist->threads = thread_map__new_str(target->pid, target->tid, |
989 | target->uid); | |
7e2ed097 ACM |
990 | |
991 | if (evlist->threads == NULL) | |
992 | return -1; | |
993 | ||
9c105fbc | 994 | if (target__uses_dummy_map(target)) |
d1cb9fce | 995 | evlist->cpus = cpu_map__dummy_new(); |
879d77d0 NK |
996 | else |
997 | evlist->cpus = cpu_map__new(target->cpu_list); | |
7e2ed097 ACM |
998 | |
999 | if (evlist->cpus == NULL) | |
1000 | goto out_delete_threads; | |
1001 | ||
1002 | return 0; | |
1003 | ||
1004 | out_delete_threads: | |
1005 | thread_map__delete(evlist->threads); | |
1006 | return -1; | |
1007 | } | |
1008 | ||
1491a632 | 1009 | int perf_evlist__apply_filters(struct perf_evlist *evlist) |
0a102479 | 1010 | { |
0a102479 | 1011 | struct perf_evsel *evsel; |
745cefc5 ACM |
1012 | int err = 0; |
1013 | const int ncpus = cpu_map__nr(evlist->cpus), | |
b3a319d5 | 1014 | nthreads = thread_map__nr(evlist->threads); |
0a102479 | 1015 | |
0050f7aa | 1016 | evlist__for_each(evlist, evsel) { |
745cefc5 | 1017 | if (evsel->filter == NULL) |
0a102479 | 1018 | continue; |
745cefc5 ACM |
1019 | |
1020 | err = perf_evsel__set_filter(evsel, ncpus, nthreads, evsel->filter); | |
1021 | if (err) | |
1022 | break; | |
0a102479 FW |
1023 | } |
1024 | ||
745cefc5 ACM |
1025 | return err; |
1026 | } | |
1027 | ||
1028 | int perf_evlist__set_filter(struct perf_evlist *evlist, const char *filter) | |
1029 | { | |
1030 | struct perf_evsel *evsel; | |
1031 | int err = 0; | |
1032 | const int ncpus = cpu_map__nr(evlist->cpus), | |
b3a319d5 | 1033 | nthreads = thread_map__nr(evlist->threads); |
745cefc5 | 1034 | |
0050f7aa | 1035 | evlist__for_each(evlist, evsel) { |
745cefc5 ACM |
1036 | err = perf_evsel__set_filter(evsel, ncpus, nthreads, filter); |
1037 | if (err) | |
1038 | break; | |
1039 | } | |
1040 | ||
1041 | return err; | |
0a102479 | 1042 | } |
74429964 | 1043 | |
0c21f736 | 1044 | bool perf_evlist__valid_sample_type(struct perf_evlist *evlist) |
74429964 | 1045 | { |
75562573 | 1046 | struct perf_evsel *pos; |
c2a70653 | 1047 | |
75562573 AH |
1048 | if (evlist->nr_entries == 1) |
1049 | return true; | |
1050 | ||
1051 | if (evlist->id_pos < 0 || evlist->is_pos < 0) | |
1052 | return false; | |
1053 | ||
0050f7aa | 1054 | evlist__for_each(evlist, pos) { |
75562573 AH |
1055 | if (pos->id_pos != evlist->id_pos || |
1056 | pos->is_pos != evlist->is_pos) | |
c2a70653 | 1057 | return false; |
74429964 FW |
1058 | } |
1059 | ||
c2a70653 | 1060 | return true; |
74429964 FW |
1061 | } |
1062 | ||
75562573 | 1063 | u64 __perf_evlist__combined_sample_type(struct perf_evlist *evlist) |
c2a70653 | 1064 | { |
75562573 AH |
1065 | struct perf_evsel *evsel; |
1066 | ||
1067 | if (evlist->combined_sample_type) | |
1068 | return evlist->combined_sample_type; | |
1069 | ||
0050f7aa | 1070 | evlist__for_each(evlist, evsel) |
75562573 AH |
1071 | evlist->combined_sample_type |= evsel->attr.sample_type; |
1072 | ||
1073 | return evlist->combined_sample_type; | |
1074 | } | |
1075 | ||
1076 | u64 perf_evlist__combined_sample_type(struct perf_evlist *evlist) | |
1077 | { | |
1078 | evlist->combined_sample_type = 0; | |
1079 | return __perf_evlist__combined_sample_type(evlist); | |
c2a70653 ACM |
1080 | } |
1081 | ||
9ede473c JO |
1082 | bool perf_evlist__valid_read_format(struct perf_evlist *evlist) |
1083 | { | |
1084 | struct perf_evsel *first = perf_evlist__first(evlist), *pos = first; | |
1085 | u64 read_format = first->attr.read_format; | |
1086 | u64 sample_type = first->attr.sample_type; | |
1087 | ||
0050f7aa | 1088 | evlist__for_each(evlist, pos) { |
9ede473c JO |
1089 | if (read_format != pos->attr.read_format) |
1090 | return false; | |
1091 | } | |
1092 | ||
1093 | /* PERF_SAMPLE_READ imples PERF_FORMAT_ID. */ | |
1094 | if ((sample_type & PERF_SAMPLE_READ) && | |
1095 | !(read_format & PERF_FORMAT_ID)) { | |
1096 | return false; | |
1097 | } | |
1098 | ||
1099 | return true; | |
1100 | } | |
1101 | ||
1102 | u64 perf_evlist__read_format(struct perf_evlist *evlist) | |
1103 | { | |
1104 | struct perf_evsel *first = perf_evlist__first(evlist); | |
1105 | return first->attr.read_format; | |
1106 | } | |
1107 | ||
0c21f736 | 1108 | u16 perf_evlist__id_hdr_size(struct perf_evlist *evlist) |
81e36bff | 1109 | { |
0c21f736 | 1110 | struct perf_evsel *first = perf_evlist__first(evlist); |
81e36bff ACM |
1111 | struct perf_sample *data; |
1112 | u64 sample_type; | |
1113 | u16 size = 0; | |
1114 | ||
81e36bff ACM |
1115 | if (!first->attr.sample_id_all) |
1116 | goto out; | |
1117 | ||
1118 | sample_type = first->attr.sample_type; | |
1119 | ||
1120 | if (sample_type & PERF_SAMPLE_TID) | |
1121 | size += sizeof(data->tid) * 2; | |
1122 | ||
1123 | if (sample_type & PERF_SAMPLE_TIME) | |
1124 | size += sizeof(data->time); | |
1125 | ||
1126 | if (sample_type & PERF_SAMPLE_ID) | |
1127 | size += sizeof(data->id); | |
1128 | ||
1129 | if (sample_type & PERF_SAMPLE_STREAM_ID) | |
1130 | size += sizeof(data->stream_id); | |
1131 | ||
1132 | if (sample_type & PERF_SAMPLE_CPU) | |
1133 | size += sizeof(data->cpu) * 2; | |
75562573 AH |
1134 | |
1135 | if (sample_type & PERF_SAMPLE_IDENTIFIER) | |
1136 | size += sizeof(data->id); | |
81e36bff ACM |
1137 | out: |
1138 | return size; | |
1139 | } | |
1140 | ||
0c21f736 | 1141 | bool perf_evlist__valid_sample_id_all(struct perf_evlist *evlist) |
74429964 | 1142 | { |
0c21f736 | 1143 | struct perf_evsel *first = perf_evlist__first(evlist), *pos = first; |
c2a70653 | 1144 | |
0050f7aa | 1145 | evlist__for_each_continue(evlist, pos) { |
c2a70653 ACM |
1146 | if (first->attr.sample_id_all != pos->attr.sample_id_all) |
1147 | return false; | |
74429964 FW |
1148 | } |
1149 | ||
c2a70653 ACM |
1150 | return true; |
1151 | } | |
1152 | ||
0c21f736 | 1153 | bool perf_evlist__sample_id_all(struct perf_evlist *evlist) |
c2a70653 | 1154 | { |
0c21f736 | 1155 | struct perf_evsel *first = perf_evlist__first(evlist); |
c2a70653 | 1156 | return first->attr.sample_id_all; |
74429964 | 1157 | } |
81cce8de ACM |
1158 | |
1159 | void perf_evlist__set_selected(struct perf_evlist *evlist, | |
1160 | struct perf_evsel *evsel) | |
1161 | { | |
1162 | evlist->selected = evsel; | |
1163 | } | |
727ab04e | 1164 | |
a74b4b66 NK |
1165 | void perf_evlist__close(struct perf_evlist *evlist) |
1166 | { | |
1167 | struct perf_evsel *evsel; | |
1168 | int ncpus = cpu_map__nr(evlist->cpus); | |
1169 | int nthreads = thread_map__nr(evlist->threads); | |
8ad9219e | 1170 | int n; |
a74b4b66 | 1171 | |
8ad9219e SE |
1172 | evlist__for_each_reverse(evlist, evsel) { |
1173 | n = evsel->cpus ? evsel->cpus->nr : ncpus; | |
1174 | perf_evsel__close(evsel, n, nthreads); | |
1175 | } | |
a74b4b66 NK |
1176 | } |
1177 | ||
6a4bb04c | 1178 | int perf_evlist__open(struct perf_evlist *evlist) |
727ab04e | 1179 | { |
6a4bb04c | 1180 | struct perf_evsel *evsel; |
a74b4b66 | 1181 | int err; |
727ab04e | 1182 | |
733cd2fe AH |
1183 | perf_evlist__update_id_pos(evlist); |
1184 | ||
0050f7aa | 1185 | evlist__for_each(evlist, evsel) { |
6a4bb04c | 1186 | err = perf_evsel__open(evsel, evlist->cpus, evlist->threads); |
727ab04e ACM |
1187 | if (err < 0) |
1188 | goto out_err; | |
1189 | } | |
1190 | ||
1191 | return 0; | |
1192 | out_err: | |
a74b4b66 | 1193 | perf_evlist__close(evlist); |
41c21a68 | 1194 | errno = -err; |
727ab04e ACM |
1195 | return err; |
1196 | } | |
35b9d88e | 1197 | |
602ad878 | 1198 | int perf_evlist__prepare_workload(struct perf_evlist *evlist, struct target *target, |
55e162ea | 1199 | const char *argv[], bool pipe_output, |
735f7e0b | 1200 | void (*exec_error)(int signo, siginfo_t *info, void *ucontext)) |
35b9d88e ACM |
1201 | { |
1202 | int child_ready_pipe[2], go_pipe[2]; | |
1203 | char bf; | |
1204 | ||
1205 | if (pipe(child_ready_pipe) < 0) { | |
1206 | perror("failed to create 'ready' pipe"); | |
1207 | return -1; | |
1208 | } | |
1209 | ||
1210 | if (pipe(go_pipe) < 0) { | |
1211 | perror("failed to create 'go' pipe"); | |
1212 | goto out_close_ready_pipe; | |
1213 | } | |
1214 | ||
1215 | evlist->workload.pid = fork(); | |
1216 | if (evlist->workload.pid < 0) { | |
1217 | perror("failed to fork"); | |
1218 | goto out_close_pipes; | |
1219 | } | |
1220 | ||
1221 | if (!evlist->workload.pid) { | |
5f1c4225 ACM |
1222 | int ret; |
1223 | ||
119fa3c9 | 1224 | if (pipe_output) |
35b9d88e ACM |
1225 | dup2(2, 1); |
1226 | ||
0817df08 DA |
1227 | signal(SIGTERM, SIG_DFL); |
1228 | ||
35b9d88e ACM |
1229 | close(child_ready_pipe[0]); |
1230 | close(go_pipe[1]); | |
1231 | fcntl(go_pipe[0], F_SETFD, FD_CLOEXEC); | |
1232 | ||
35b9d88e ACM |
1233 | /* |
1234 | * Tell the parent we're ready to go | |
1235 | */ | |
1236 | close(child_ready_pipe[1]); | |
1237 | ||
1238 | /* | |
1239 | * Wait until the parent tells us to go. | |
1240 | */ | |
5f1c4225 ACM |
1241 | ret = read(go_pipe[0], &bf, 1); |
1242 | /* | |
1243 | * The parent will ask for the execvp() to be performed by | |
1244 | * writing exactly one byte, in workload.cork_fd, usually via | |
1245 | * perf_evlist__start_workload(). | |
1246 | * | |
1247 | * For cancelling the workload without actuallin running it, | |
1248 | * the parent will just close workload.cork_fd, without writing | |
1249 | * anything, i.e. read will return zero and we just exit() | |
1250 | * here. | |
1251 | */ | |
1252 | if (ret != 1) { | |
1253 | if (ret == -1) | |
1254 | perror("unable to read pipe"); | |
1255 | exit(ret); | |
1256 | } | |
35b9d88e ACM |
1257 | |
1258 | execvp(argv[0], (char **)argv); | |
1259 | ||
735f7e0b | 1260 | if (exec_error) { |
f33cbe72 ACM |
1261 | union sigval val; |
1262 | ||
1263 | val.sival_int = errno; | |
1264 | if (sigqueue(getppid(), SIGUSR1, val)) | |
1265 | perror(argv[0]); | |
1266 | } else | |
1267 | perror(argv[0]); | |
35b9d88e ACM |
1268 | exit(-1); |
1269 | } | |
1270 | ||
735f7e0b ACM |
1271 | if (exec_error) { |
1272 | struct sigaction act = { | |
1273 | .sa_flags = SA_SIGINFO, | |
1274 | .sa_sigaction = exec_error, | |
1275 | }; | |
1276 | sigaction(SIGUSR1, &act, NULL); | |
1277 | } | |
1278 | ||
602ad878 | 1279 | if (target__none(target)) |
35b9d88e ACM |
1280 | evlist->threads->map[0] = evlist->workload.pid; |
1281 | ||
1282 | close(child_ready_pipe[1]); | |
1283 | close(go_pipe[0]); | |
1284 | /* | |
1285 | * wait for child to settle | |
1286 | */ | |
1287 | if (read(child_ready_pipe[0], &bf, 1) == -1) { | |
1288 | perror("unable to read pipe"); | |
1289 | goto out_close_pipes; | |
1290 | } | |
1291 | ||
bcf3145f | 1292 | fcntl(go_pipe[1], F_SETFD, FD_CLOEXEC); |
35b9d88e ACM |
1293 | evlist->workload.cork_fd = go_pipe[1]; |
1294 | close(child_ready_pipe[0]); | |
1295 | return 0; | |
1296 | ||
1297 | out_close_pipes: | |
1298 | close(go_pipe[0]); | |
1299 | close(go_pipe[1]); | |
1300 | out_close_ready_pipe: | |
1301 | close(child_ready_pipe[0]); | |
1302 | close(child_ready_pipe[1]); | |
1303 | return -1; | |
1304 | } | |
1305 | ||
1306 | int perf_evlist__start_workload(struct perf_evlist *evlist) | |
1307 | { | |
1308 | if (evlist->workload.cork_fd > 0) { | |
b3824404 | 1309 | char bf = 0; |
bcf3145f | 1310 | int ret; |
35b9d88e ACM |
1311 | /* |
1312 | * Remove the cork, let it rip! | |
1313 | */ | |
bcf3145f NK |
1314 | ret = write(evlist->workload.cork_fd, &bf, 1); |
1315 | if (ret < 0) | |
1316 | perror("enable to write to pipe"); | |
1317 | ||
1318 | close(evlist->workload.cork_fd); | |
1319 | return ret; | |
35b9d88e ACM |
1320 | } |
1321 | ||
1322 | return 0; | |
1323 | } | |
cb0b29e0 | 1324 | |
a3f698fe | 1325 | int perf_evlist__parse_sample(struct perf_evlist *evlist, union perf_event *event, |
0807d2d8 | 1326 | struct perf_sample *sample) |
cb0b29e0 | 1327 | { |
75562573 AH |
1328 | struct perf_evsel *evsel = perf_evlist__event2evsel(evlist, event); |
1329 | ||
1330 | if (!evsel) | |
1331 | return -EFAULT; | |
0807d2d8 | 1332 | return perf_evsel__parse_sample(evsel, event, sample); |
cb0b29e0 | 1333 | } |
78f067b3 ACM |
1334 | |
1335 | size_t perf_evlist__fprintf(struct perf_evlist *evlist, FILE *fp) | |
1336 | { | |
1337 | struct perf_evsel *evsel; | |
1338 | size_t printed = 0; | |
1339 | ||
0050f7aa | 1340 | evlist__for_each(evlist, evsel) { |
78f067b3 ACM |
1341 | printed += fprintf(fp, "%s%s", evsel->idx ? ", " : "", |
1342 | perf_evsel__name(evsel)); | |
1343 | } | |
1344 | ||
b2222139 | 1345 | return printed + fprintf(fp, "\n"); |
78f067b3 | 1346 | } |
6ef068cb ACM |
1347 | |
1348 | int perf_evlist__strerror_tp(struct perf_evlist *evlist __maybe_unused, | |
1349 | int err, char *buf, size_t size) | |
1350 | { | |
1351 | char sbuf[128]; | |
1352 | ||
1353 | switch (err) { | |
1354 | case ENOENT: | |
1355 | scnprintf(buf, size, "%s", | |
1356 | "Error:\tUnable to find debugfs\n" | |
1357 | "Hint:\tWas your kernel was compiled with debugfs support?\n" | |
1358 | "Hint:\tIs the debugfs filesystem mounted?\n" | |
1359 | "Hint:\tTry 'sudo mount -t debugfs nodev /sys/kernel/debug'"); | |
1360 | break; | |
1361 | case EACCES: | |
1362 | scnprintf(buf, size, | |
1363 | "Error:\tNo permissions to read %s/tracing/events/raw_syscalls\n" | |
1364 | "Hint:\tTry 'sudo mount -o remount,mode=755 %s'\n", | |
1365 | debugfs_mountpoint, debugfs_mountpoint); | |
1366 | break; | |
1367 | default: | |
1368 | scnprintf(buf, size, "%s", strerror_r(err, sbuf, sizeof(sbuf))); | |
1369 | break; | |
1370 | } | |
1371 | ||
1372 | return 0; | |
1373 | } | |
a8f23d8f ACM |
1374 | |
1375 | int perf_evlist__strerror_open(struct perf_evlist *evlist __maybe_unused, | |
1376 | int err, char *buf, size_t size) | |
1377 | { | |
1378 | int printed, value; | |
6e81c74c | 1379 | char sbuf[STRERR_BUFSIZE], *emsg = strerror_r(err, sbuf, sizeof(sbuf)); |
a8f23d8f ACM |
1380 | |
1381 | switch (err) { | |
1382 | case EACCES: | |
1383 | case EPERM: | |
1384 | printed = scnprintf(buf, size, | |
1385 | "Error:\t%s.\n" | |
1386 | "Hint:\tCheck /proc/sys/kernel/perf_event_paranoid setting.", emsg); | |
1387 | ||
1a47245d | 1388 | value = perf_event_paranoid(); |
a8f23d8f ACM |
1389 | |
1390 | printed += scnprintf(buf + printed, size - printed, "\nHint:\t"); | |
1391 | ||
1392 | if (value >= 2) { | |
1393 | printed += scnprintf(buf + printed, size - printed, | |
1394 | "For your workloads it needs to be <= 1\nHint:\t"); | |
1395 | } | |
1396 | printed += scnprintf(buf + printed, size - printed, | |
5229e366 | 1397 | "For system wide tracing it needs to be set to -1.\n"); |
a8f23d8f ACM |
1398 | |
1399 | printed += scnprintf(buf + printed, size - printed, | |
5229e366 ACM |
1400 | "Hint:\tTry: 'sudo sh -c \"echo -1 > /proc/sys/kernel/perf_event_paranoid\"'\n" |
1401 | "Hint:\tThe current value is %d.", value); | |
a8f23d8f ACM |
1402 | break; |
1403 | default: | |
1404 | scnprintf(buf, size, "%s", emsg); | |
1405 | break; | |
1406 | } | |
1407 | ||
1408 | return 0; | |
1409 | } | |
a025e4f0 AH |
1410 | |
1411 | void perf_evlist__to_front(struct perf_evlist *evlist, | |
1412 | struct perf_evsel *move_evsel) | |
1413 | { | |
1414 | struct perf_evsel *evsel, *n; | |
1415 | LIST_HEAD(move); | |
1416 | ||
1417 | if (move_evsel == perf_evlist__first(evlist)) | |
1418 | return; | |
1419 | ||
0050f7aa | 1420 | evlist__for_each_safe(evlist, n, evsel) { |
a025e4f0 AH |
1421 | if (evsel->leader == move_evsel->leader) |
1422 | list_move_tail(&evsel->node, &move); | |
1423 | } | |
1424 | ||
1425 | list_splice(&move, &evlist->entries); | |
1426 | } | |
60b0896c AH |
1427 | |
1428 | void perf_evlist__set_tracking_event(struct perf_evlist *evlist, | |
1429 | struct perf_evsel *tracking_evsel) | |
1430 | { | |
1431 | struct perf_evsel *evsel; | |
1432 | ||
1433 | if (tracking_evsel->tracking) | |
1434 | return; | |
1435 | ||
1436 | evlist__for_each(evlist, evsel) { | |
1437 | if (evsel != tracking_evsel) | |
1438 | evsel->tracking = false; | |
1439 | } | |
1440 | ||
1441 | tracking_evsel->tracking = true; | |
1442 | } |