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