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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 | ||
ad6765dd ACM |
405 | static int perf_evlist__grow_pollfd(struct perf_evlist *evlist, int hint) |
406 | { | |
407 | int nr_fds_alloc = evlist->nr_fds_alloc + hint; | |
408 | size_t size = sizeof(struct pollfd) * nr_fds_alloc; | |
409 | struct pollfd *pollfd = realloc(evlist->pollfd, size); | |
410 | ||
411 | if (pollfd == NULL) | |
412 | return -ENOMEM; | |
413 | ||
414 | evlist->nr_fds_alloc = nr_fds_alloc; | |
415 | evlist->pollfd = pollfd; | |
416 | return 0; | |
417 | } | |
418 | ||
419 | int perf_evlist__alloc_pollfd(struct perf_evlist *evlist) | |
5c581041 | 420 | { |
b3a319d5 NK |
421 | int nr_cpus = cpu_map__nr(evlist->cpus); |
422 | int nr_threads = thread_map__nr(evlist->threads); | |
bf8e8f4b AH |
423 | int nfds = 0; |
424 | struct perf_evsel *evsel; | |
425 | ||
426 | list_for_each_entry(evsel, &evlist->entries, node) { | |
427 | if (evsel->system_wide) | |
428 | nfds += nr_cpus; | |
429 | else | |
430 | nfds += nr_cpus * nr_threads; | |
431 | } | |
432 | ||
ad6765dd ACM |
433 | if (evlist->nr_fds_alloc - evlist->nr_fds < nfds && |
434 | perf_evlist__grow_pollfd(evlist, nfds) < 0) | |
435 | return -ENOMEM; | |
436 | ||
437 | return 0; | |
5c581041 | 438 | } |
70082dd9 | 439 | |
ad6765dd | 440 | int perf_evlist__add_pollfd(struct perf_evlist *evlist, int fd) |
70082dd9 | 441 | { |
ad6765dd ACM |
442 | /* |
443 | * XXX: 64 is arbitrary, just not to call realloc at each fd. | |
444 | * Find a better autogrowing heuristic | |
445 | */ | |
446 | if (evlist->nr_fds == evlist->nr_fds_alloc && | |
447 | perf_evlist__grow_pollfd(evlist, 64) < 0) | |
448 | return -ENOMEM; | |
449 | ||
70082dd9 ACM |
450 | fcntl(fd, F_SETFL, O_NONBLOCK); |
451 | evlist->pollfd[evlist->nr_fds].fd = fd; | |
8179672c | 452 | evlist->pollfd[evlist->nr_fds].events = POLLIN | POLLERR | POLLHUP; |
70082dd9 | 453 | evlist->nr_fds++; |
ad6765dd | 454 | return 0; |
70082dd9 | 455 | } |
70db7533 | 456 | |
1ddec7f0 ACM |
457 | int perf_evlist__filter_pollfd(struct perf_evlist *evlist, short revents_and_mask) |
458 | { | |
459 | int fd, nr_fds = 0; | |
460 | ||
461 | if (evlist->nr_fds == 0) | |
462 | return 0; | |
463 | ||
464 | for (fd = 0; fd < evlist->nr_fds; ++fd) { | |
465 | if (evlist->pollfd[fd].revents & revents_and_mask) | |
466 | continue; | |
467 | ||
468 | if (fd != nr_fds) | |
469 | evlist->pollfd[nr_fds] = evlist->pollfd[fd]; | |
470 | ||
471 | ++nr_fds; | |
472 | } | |
473 | ||
474 | evlist->nr_fds = nr_fds; | |
475 | return nr_fds; | |
476 | } | |
477 | ||
f66a889d ACM |
478 | int perf_evlist__poll(struct perf_evlist *evlist, int timeout) |
479 | { | |
480 | return poll(evlist->pollfd, evlist->nr_fds, timeout); | |
481 | } | |
482 | ||
a91e5431 ACM |
483 | static void perf_evlist__id_hash(struct perf_evlist *evlist, |
484 | struct perf_evsel *evsel, | |
485 | int cpu, int thread, u64 id) | |
3d3b5e95 ACM |
486 | { |
487 | int hash; | |
488 | struct perf_sample_id *sid = SID(evsel, cpu, thread); | |
489 | ||
490 | sid->id = id; | |
491 | sid->evsel = evsel; | |
492 | hash = hash_64(sid->id, PERF_EVLIST__HLIST_BITS); | |
493 | hlist_add_head(&sid->node, &evlist->heads[hash]); | |
494 | } | |
495 | ||
a91e5431 ACM |
496 | void perf_evlist__id_add(struct perf_evlist *evlist, struct perf_evsel *evsel, |
497 | int cpu, int thread, u64 id) | |
498 | { | |
499 | perf_evlist__id_hash(evlist, evsel, cpu, thread, id); | |
500 | evsel->id[evsel->ids++] = id; | |
501 | } | |
502 | ||
503 | static int perf_evlist__id_add_fd(struct perf_evlist *evlist, | |
504 | struct perf_evsel *evsel, | |
505 | int cpu, int thread, int fd) | |
f8a95309 | 506 | { |
f8a95309 | 507 | u64 read_data[4] = { 0, }; |
3d3b5e95 | 508 | int id_idx = 1; /* The first entry is the counter value */ |
e2b5abe0 JO |
509 | u64 id; |
510 | int ret; | |
511 | ||
512 | ret = ioctl(fd, PERF_EVENT_IOC_ID, &id); | |
513 | if (!ret) | |
514 | goto add; | |
515 | ||
516 | if (errno != ENOTTY) | |
517 | return -1; | |
518 | ||
519 | /* Legacy way to get event id.. All hail to old kernels! */ | |
f8a95309 | 520 | |
c4861afe JO |
521 | /* |
522 | * This way does not work with group format read, so bail | |
523 | * out in that case. | |
524 | */ | |
525 | if (perf_evlist__read_format(evlist) & PERF_FORMAT_GROUP) | |
526 | return -1; | |
527 | ||
f8a95309 ACM |
528 | if (!(evsel->attr.read_format & PERF_FORMAT_ID) || |
529 | read(fd, &read_data, sizeof(read_data)) == -1) | |
530 | return -1; | |
531 | ||
532 | if (evsel->attr.read_format & PERF_FORMAT_TOTAL_TIME_ENABLED) | |
533 | ++id_idx; | |
534 | if (evsel->attr.read_format & PERF_FORMAT_TOTAL_TIME_RUNNING) | |
535 | ++id_idx; | |
536 | ||
e2b5abe0 JO |
537 | id = read_data[id_idx]; |
538 | ||
539 | add: | |
540 | perf_evlist__id_add(evlist, evsel, cpu, thread, id); | |
f8a95309 ACM |
541 | return 0; |
542 | } | |
543 | ||
932a3594 | 544 | struct perf_sample_id *perf_evlist__id2sid(struct perf_evlist *evlist, u64 id) |
70db7533 ACM |
545 | { |
546 | struct hlist_head *head; | |
70db7533 ACM |
547 | struct perf_sample_id *sid; |
548 | int hash; | |
549 | ||
70db7533 ACM |
550 | hash = hash_64(id, PERF_EVLIST__HLIST_BITS); |
551 | head = &evlist->heads[hash]; | |
552 | ||
b67bfe0d | 553 | hlist_for_each_entry(sid, head, node) |
70db7533 | 554 | if (sid->id == id) |
932a3594 JO |
555 | return sid; |
556 | ||
557 | return NULL; | |
558 | } | |
559 | ||
560 | struct perf_evsel *perf_evlist__id2evsel(struct perf_evlist *evlist, u64 id) | |
561 | { | |
562 | struct perf_sample_id *sid; | |
563 | ||
564 | if (evlist->nr_entries == 1) | |
565 | return perf_evlist__first(evlist); | |
566 | ||
567 | sid = perf_evlist__id2sid(evlist, id); | |
568 | if (sid) | |
569 | return sid->evsel; | |
30e68bcc NK |
570 | |
571 | if (!perf_evlist__sample_id_all(evlist)) | |
0c21f736 | 572 | return perf_evlist__first(evlist); |
30e68bcc | 573 | |
70db7533 ACM |
574 | return NULL; |
575 | } | |
04391deb | 576 | |
75562573 AH |
577 | static int perf_evlist__event2id(struct perf_evlist *evlist, |
578 | union perf_event *event, u64 *id) | |
579 | { | |
580 | const u64 *array = event->sample.array; | |
581 | ssize_t n; | |
582 | ||
583 | n = (event->header.size - sizeof(event->header)) >> 3; | |
584 | ||
585 | if (event->header.type == PERF_RECORD_SAMPLE) { | |
586 | if (evlist->id_pos >= n) | |
587 | return -1; | |
588 | *id = array[evlist->id_pos]; | |
589 | } else { | |
590 | if (evlist->is_pos > n) | |
591 | return -1; | |
592 | n -= evlist->is_pos; | |
593 | *id = array[n]; | |
594 | } | |
595 | return 0; | |
596 | } | |
597 | ||
598 | static struct perf_evsel *perf_evlist__event2evsel(struct perf_evlist *evlist, | |
599 | union perf_event *event) | |
600 | { | |
98be6966 | 601 | struct perf_evsel *first = perf_evlist__first(evlist); |
75562573 AH |
602 | struct hlist_head *head; |
603 | struct perf_sample_id *sid; | |
604 | int hash; | |
605 | u64 id; | |
606 | ||
607 | if (evlist->nr_entries == 1) | |
98be6966 AH |
608 | return first; |
609 | ||
610 | if (!first->attr.sample_id_all && | |
611 | event->header.type != PERF_RECORD_SAMPLE) | |
612 | return first; | |
75562573 AH |
613 | |
614 | if (perf_evlist__event2id(evlist, event, &id)) | |
615 | return NULL; | |
616 | ||
617 | /* Synthesized events have an id of zero */ | |
618 | if (!id) | |
98be6966 | 619 | return first; |
75562573 AH |
620 | |
621 | hash = hash_64(id, PERF_EVLIST__HLIST_BITS); | |
622 | head = &evlist->heads[hash]; | |
623 | ||
624 | hlist_for_each_entry(sid, head, node) { | |
625 | if (sid->id == id) | |
626 | return sid->evsel; | |
627 | } | |
628 | return NULL; | |
629 | } | |
630 | ||
aece948f | 631 | union perf_event *perf_evlist__mmap_read(struct perf_evlist *evlist, int idx) |
04391deb | 632 | { |
aece948f | 633 | struct perf_mmap *md = &evlist->mmap[idx]; |
04391deb ACM |
634 | unsigned int head = perf_mmap__read_head(md); |
635 | unsigned int old = md->prev; | |
636 | unsigned char *data = md->base + page_size; | |
8115d60c | 637 | union perf_event *event = NULL; |
04391deb | 638 | |
7bb41152 | 639 | if (evlist->overwrite) { |
04391deb | 640 | /* |
7bb41152 ACM |
641 | * If we're further behind than half the buffer, there's a chance |
642 | * the writer will bite our tail and mess up the samples under us. | |
643 | * | |
644 | * If we somehow ended up ahead of the head, we got messed up. | |
645 | * | |
646 | * In either case, truncate and restart at head. | |
04391deb | 647 | */ |
7bb41152 ACM |
648 | int diff = head - old; |
649 | if (diff > md->mask / 2 || diff < 0) { | |
650 | fprintf(stderr, "WARNING: failed to keep up with mmap data.\n"); | |
651 | ||
652 | /* | |
653 | * head points to a known good entry, start there. | |
654 | */ | |
655 | old = head; | |
656 | } | |
04391deb ACM |
657 | } |
658 | ||
659 | if (old != head) { | |
660 | size_t size; | |
661 | ||
8115d60c | 662 | event = (union perf_event *)&data[old & md->mask]; |
04391deb ACM |
663 | size = event->header.size; |
664 | ||
665 | /* | |
666 | * Event straddles the mmap boundary -- header should always | |
667 | * be inside due to u64 alignment of output. | |
668 | */ | |
669 | if ((old & md->mask) + size != ((old + size) & md->mask)) { | |
670 | unsigned int offset = old; | |
671 | unsigned int len = min(sizeof(*event), size), cpy; | |
a65cb4b9 | 672 | void *dst = md->event_copy; |
04391deb ACM |
673 | |
674 | do { | |
675 | cpy = min(md->mask + 1 - (offset & md->mask), len); | |
676 | memcpy(dst, &data[offset & md->mask], cpy); | |
677 | offset += cpy; | |
678 | dst += cpy; | |
679 | len -= cpy; | |
680 | } while (len); | |
681 | ||
a65cb4b9 | 682 | event = (union perf_event *) md->event_copy; |
04391deb ACM |
683 | } |
684 | ||
685 | old += size; | |
686 | } | |
687 | ||
688 | md->prev = old; | |
7bb41152 | 689 | |
04391deb ACM |
690 | return event; |
691 | } | |
f8a95309 | 692 | |
8e50d384 ZZ |
693 | void perf_evlist__mmap_consume(struct perf_evlist *evlist, int idx) |
694 | { | |
695 | if (!evlist->overwrite) { | |
696 | struct perf_mmap *md = &evlist->mmap[idx]; | |
697 | unsigned int old = md->prev; | |
698 | ||
699 | perf_mmap__write_tail(md, old); | |
700 | } | |
701 | } | |
702 | ||
93edcbd9 AH |
703 | static void __perf_evlist__munmap(struct perf_evlist *evlist, int idx) |
704 | { | |
705 | if (evlist->mmap[idx].base != NULL) { | |
706 | munmap(evlist->mmap[idx].base, evlist->mmap_len); | |
707 | evlist->mmap[idx].base = NULL; | |
708 | } | |
709 | } | |
710 | ||
7e2ed097 | 711 | void perf_evlist__munmap(struct perf_evlist *evlist) |
f8a95309 | 712 | { |
aece948f | 713 | int i; |
f8a95309 | 714 | |
983874d1 ACM |
715 | if (evlist->mmap == NULL) |
716 | return; | |
717 | ||
93edcbd9 AH |
718 | for (i = 0; i < evlist->nr_mmaps; i++) |
719 | __perf_evlist__munmap(evlist, i); | |
aece948f | 720 | |
04662523 | 721 | zfree(&evlist->mmap); |
f8a95309 ACM |
722 | } |
723 | ||
806fb630 | 724 | static int perf_evlist__alloc_mmap(struct perf_evlist *evlist) |
f8a95309 | 725 | { |
a14bb7a6 | 726 | evlist->nr_mmaps = cpu_map__nr(evlist->cpus); |
ec1e7e43 | 727 | if (cpu_map__empty(evlist->cpus)) |
b3a319d5 | 728 | evlist->nr_mmaps = thread_map__nr(evlist->threads); |
aece948f | 729 | evlist->mmap = zalloc(evlist->nr_mmaps * sizeof(struct perf_mmap)); |
f8a95309 ACM |
730 | return evlist->mmap != NULL ? 0 : -ENOMEM; |
731 | } | |
732 | ||
a8a8f3eb AH |
733 | struct mmap_params { |
734 | int prot; | |
735 | int mask; | |
736 | }; | |
737 | ||
738 | static int __perf_evlist__mmap(struct perf_evlist *evlist, int idx, | |
739 | struct mmap_params *mp, int fd) | |
f8a95309 | 740 | { |
aece948f | 741 | evlist->mmap[idx].prev = 0; |
a8a8f3eb AH |
742 | evlist->mmap[idx].mask = mp->mask; |
743 | evlist->mmap[idx].base = mmap(NULL, evlist->mmap_len, mp->prot, | |
f8a95309 | 744 | MAP_SHARED, fd, 0); |
301b195d | 745 | if (evlist->mmap[idx].base == MAP_FAILED) { |
02635965 AH |
746 | pr_debug2("failed to mmap perf event ring buffer, error %d\n", |
747 | errno); | |
301b195d | 748 | evlist->mmap[idx].base = NULL; |
f8a95309 | 749 | return -1; |
301b195d | 750 | } |
ad6765dd | 751 | |
f8a95309 ACM |
752 | return 0; |
753 | } | |
754 | ||
04e21314 | 755 | static int perf_evlist__mmap_per_evsel(struct perf_evlist *evlist, int idx, |
a8a8f3eb AH |
756 | struct mmap_params *mp, int cpu, |
757 | int thread, int *output) | |
aece948f ACM |
758 | { |
759 | struct perf_evsel *evsel; | |
04e21314 | 760 | |
0050f7aa | 761 | evlist__for_each(evlist, evsel) { |
bf8e8f4b AH |
762 | int fd; |
763 | ||
764 | if (evsel->system_wide && thread) | |
765 | continue; | |
766 | ||
767 | fd = FD(evsel, cpu, thread); | |
04e21314 AH |
768 | |
769 | if (*output == -1) { | |
770 | *output = fd; | |
a8a8f3eb | 771 | if (__perf_evlist__mmap(evlist, idx, mp, *output) < 0) |
04e21314 AH |
772 | return -1; |
773 | } else { | |
774 | if (ioctl(fd, PERF_EVENT_IOC_SET_OUTPUT, *output) != 0) | |
775 | return -1; | |
776 | } | |
777 | ||
ad6765dd ACM |
778 | if (perf_evlist__add_pollfd(evlist, fd) < 0) |
779 | return -1; | |
033fa713 | 780 | |
04e21314 AH |
781 | if ((evsel->attr.read_format & PERF_FORMAT_ID) && |
782 | perf_evlist__id_add_fd(evlist, evsel, cpu, thread, fd) < 0) | |
783 | return -1; | |
784 | } | |
785 | ||
786 | return 0; | |
787 | } | |
788 | ||
a8a8f3eb AH |
789 | static int perf_evlist__mmap_per_cpu(struct perf_evlist *evlist, |
790 | struct mmap_params *mp) | |
04e21314 | 791 | { |
aece948f | 792 | int cpu, thread; |
b3a319d5 NK |
793 | int nr_cpus = cpu_map__nr(evlist->cpus); |
794 | int nr_threads = thread_map__nr(evlist->threads); | |
aece948f | 795 | |
e3e1a54f | 796 | pr_debug2("perf event ring buffer mmapped per cpu\n"); |
b3a319d5 | 797 | for (cpu = 0; cpu < nr_cpus; cpu++) { |
aece948f ACM |
798 | int output = -1; |
799 | ||
b3a319d5 | 800 | for (thread = 0; thread < nr_threads; thread++) { |
a8a8f3eb AH |
801 | if (perf_evlist__mmap_per_evsel(evlist, cpu, mp, cpu, |
802 | thread, &output)) | |
04e21314 | 803 | goto out_unmap; |
aece948f ACM |
804 | } |
805 | } | |
806 | ||
807 | return 0; | |
808 | ||
809 | out_unmap: | |
93edcbd9 AH |
810 | for (cpu = 0; cpu < nr_cpus; cpu++) |
811 | __perf_evlist__munmap(evlist, cpu); | |
aece948f ACM |
812 | return -1; |
813 | } | |
814 | ||
a8a8f3eb AH |
815 | static int perf_evlist__mmap_per_thread(struct perf_evlist *evlist, |
816 | struct mmap_params *mp) | |
aece948f | 817 | { |
aece948f | 818 | int thread; |
b3a319d5 | 819 | int nr_threads = thread_map__nr(evlist->threads); |
aece948f | 820 | |
e3e1a54f | 821 | pr_debug2("perf event ring buffer mmapped per thread\n"); |
b3a319d5 | 822 | for (thread = 0; thread < nr_threads; thread++) { |
aece948f ACM |
823 | int output = -1; |
824 | ||
a8a8f3eb AH |
825 | if (perf_evlist__mmap_per_evsel(evlist, thread, mp, 0, thread, |
826 | &output)) | |
04e21314 | 827 | goto out_unmap; |
aece948f ACM |
828 | } |
829 | ||
830 | return 0; | |
831 | ||
832 | out_unmap: | |
93edcbd9 AH |
833 | for (thread = 0; thread < nr_threads; thread++) |
834 | __perf_evlist__munmap(evlist, thread); | |
aece948f ACM |
835 | return -1; |
836 | } | |
837 | ||
994a1f78 JO |
838 | static size_t perf_evlist__mmap_size(unsigned long pages) |
839 | { | |
840 | /* 512 kiB: default amount of unprivileged mlocked memory */ | |
841 | if (pages == UINT_MAX) | |
842 | pages = (512 * 1024) / page_size; | |
843 | else if (!is_power_of_2(pages)) | |
844 | return 0; | |
845 | ||
846 | return (pages + 1) * page_size; | |
847 | } | |
848 | ||
33c2dcfd DA |
849 | static long parse_pages_arg(const char *str, unsigned long min, |
850 | unsigned long max) | |
994a1f78 | 851 | { |
2fbe4abe | 852 | unsigned long pages, val; |
27050f53 JO |
853 | static struct parse_tag tags[] = { |
854 | { .tag = 'B', .mult = 1 }, | |
855 | { .tag = 'K', .mult = 1 << 10 }, | |
856 | { .tag = 'M', .mult = 1 << 20 }, | |
857 | { .tag = 'G', .mult = 1 << 30 }, | |
858 | { .tag = 0 }, | |
859 | }; | |
994a1f78 | 860 | |
8973504b | 861 | if (str == NULL) |
33c2dcfd | 862 | return -EINVAL; |
8973504b | 863 | |
27050f53 | 864 | val = parse_tag_value(str, tags); |
2fbe4abe | 865 | if (val != (unsigned long) -1) { |
27050f53 JO |
866 | /* we got file size value */ |
867 | pages = PERF_ALIGN(val, page_size) / page_size; | |
27050f53 JO |
868 | } else { |
869 | /* we got pages count value */ | |
870 | char *eptr; | |
871 | pages = strtoul(str, &eptr, 10); | |
33c2dcfd DA |
872 | if (*eptr != '\0') |
873 | return -EINVAL; | |
994a1f78 JO |
874 | } |
875 | ||
2bcab6c1 | 876 | if (pages == 0 && min == 0) { |
33c2dcfd | 877 | /* leave number of pages at 0 */ |
1dbfa938 | 878 | } else if (!is_power_of_2(pages)) { |
33c2dcfd | 879 | /* round pages up to next power of 2 */ |
1dbfa938 AH |
880 | pages = next_pow2_l(pages); |
881 | if (!pages) | |
882 | return -EINVAL; | |
9639837e DA |
883 | pr_info("rounding mmap pages size to %lu bytes (%lu pages)\n", |
884 | pages * page_size, pages); | |
2fbe4abe AH |
885 | } |
886 | ||
33c2dcfd DA |
887 | if (pages > max) |
888 | return -EINVAL; | |
889 | ||
890 | return pages; | |
891 | } | |
892 | ||
893 | int perf_evlist__parse_mmap_pages(const struct option *opt, const char *str, | |
894 | int unset __maybe_unused) | |
895 | { | |
896 | unsigned int *mmap_pages = opt->value; | |
897 | unsigned long max = UINT_MAX; | |
898 | long pages; | |
899 | ||
f5ae9c42 | 900 | if (max > SIZE_MAX / page_size) |
33c2dcfd DA |
901 | max = SIZE_MAX / page_size; |
902 | ||
903 | pages = parse_pages_arg(str, 1, max); | |
904 | if (pages < 0) { | |
905 | pr_err("Invalid argument for --mmap_pages/-m\n"); | |
994a1f78 JO |
906 | return -1; |
907 | } | |
908 | ||
909 | *mmap_pages = pages; | |
910 | return 0; | |
911 | } | |
912 | ||
c83fa7f2 AH |
913 | /** |
914 | * perf_evlist__mmap - Create mmaps to receive events. | |
915 | * @evlist: list of events | |
916 | * @pages: map length in pages | |
917 | * @overwrite: overwrite older events? | |
f8a95309 | 918 | * |
c83fa7f2 AH |
919 | * If @overwrite is %false the user needs to signal event consumption using |
920 | * perf_mmap__write_tail(). Using perf_evlist__mmap_read() does this | |
921 | * automatically. | |
7e2ed097 | 922 | * |
c83fa7f2 | 923 | * Return: %0 on success, negative error code otherwise. |
f8a95309 | 924 | */ |
50a682ce ACM |
925 | int perf_evlist__mmap(struct perf_evlist *evlist, unsigned int pages, |
926 | bool overwrite) | |
f8a95309 | 927 | { |
aece948f | 928 | struct perf_evsel *evsel; |
7e2ed097 ACM |
929 | const struct cpu_map *cpus = evlist->cpus; |
930 | const struct thread_map *threads = evlist->threads; | |
a8a8f3eb AH |
931 | struct mmap_params mp = { |
932 | .prot = PROT_READ | (overwrite ? 0 : PROT_WRITE), | |
933 | }; | |
50a682ce | 934 | |
7e2ed097 | 935 | if (evlist->mmap == NULL && perf_evlist__alloc_mmap(evlist) < 0) |
f8a95309 ACM |
936 | return -ENOMEM; |
937 | ||
7e2ed097 | 938 | if (evlist->pollfd == NULL && perf_evlist__alloc_pollfd(evlist) < 0) |
f8a95309 ACM |
939 | return -ENOMEM; |
940 | ||
941 | evlist->overwrite = overwrite; | |
994a1f78 | 942 | evlist->mmap_len = perf_evlist__mmap_size(pages); |
2af68ef5 | 943 | pr_debug("mmap size %zuB\n", evlist->mmap_len); |
a8a8f3eb | 944 | mp.mask = evlist->mmap_len - page_size - 1; |
f8a95309 | 945 | |
0050f7aa | 946 | evlist__for_each(evlist, evsel) { |
f8a95309 | 947 | if ((evsel->attr.read_format & PERF_FORMAT_ID) && |
a91e5431 | 948 | evsel->sample_id == NULL && |
a14bb7a6 | 949 | perf_evsel__alloc_id(evsel, cpu_map__nr(cpus), threads->nr) < 0) |
f8a95309 | 950 | return -ENOMEM; |
f8a95309 ACM |
951 | } |
952 | ||
ec1e7e43 | 953 | if (cpu_map__empty(cpus)) |
a8a8f3eb | 954 | return perf_evlist__mmap_per_thread(evlist, &mp); |
f8a95309 | 955 | |
a8a8f3eb | 956 | return perf_evlist__mmap_per_cpu(evlist, &mp); |
f8a95309 | 957 | } |
7e2ed097 | 958 | |
602ad878 | 959 | int perf_evlist__create_maps(struct perf_evlist *evlist, struct target *target) |
7e2ed097 | 960 | { |
b809ac10 NK |
961 | evlist->threads = thread_map__new_str(target->pid, target->tid, |
962 | target->uid); | |
7e2ed097 ACM |
963 | |
964 | if (evlist->threads == NULL) | |
965 | return -1; | |
966 | ||
9c105fbc | 967 | if (target__uses_dummy_map(target)) |
d1cb9fce | 968 | evlist->cpus = cpu_map__dummy_new(); |
879d77d0 NK |
969 | else |
970 | evlist->cpus = cpu_map__new(target->cpu_list); | |
7e2ed097 ACM |
971 | |
972 | if (evlist->cpus == NULL) | |
973 | goto out_delete_threads; | |
974 | ||
975 | return 0; | |
976 | ||
977 | out_delete_threads: | |
978 | thread_map__delete(evlist->threads); | |
979 | return -1; | |
980 | } | |
981 | ||
1491a632 | 982 | int perf_evlist__apply_filters(struct perf_evlist *evlist) |
0a102479 | 983 | { |
0a102479 | 984 | struct perf_evsel *evsel; |
745cefc5 ACM |
985 | int err = 0; |
986 | const int ncpus = cpu_map__nr(evlist->cpus), | |
b3a319d5 | 987 | nthreads = thread_map__nr(evlist->threads); |
0a102479 | 988 | |
0050f7aa | 989 | evlist__for_each(evlist, evsel) { |
745cefc5 | 990 | if (evsel->filter == NULL) |
0a102479 | 991 | continue; |
745cefc5 ACM |
992 | |
993 | err = perf_evsel__set_filter(evsel, ncpus, nthreads, evsel->filter); | |
994 | if (err) | |
995 | break; | |
0a102479 FW |
996 | } |
997 | ||
745cefc5 ACM |
998 | return err; |
999 | } | |
1000 | ||
1001 | int perf_evlist__set_filter(struct perf_evlist *evlist, const char *filter) | |
1002 | { | |
1003 | struct perf_evsel *evsel; | |
1004 | int err = 0; | |
1005 | const int ncpus = cpu_map__nr(evlist->cpus), | |
b3a319d5 | 1006 | nthreads = thread_map__nr(evlist->threads); |
745cefc5 | 1007 | |
0050f7aa | 1008 | evlist__for_each(evlist, evsel) { |
745cefc5 ACM |
1009 | err = perf_evsel__set_filter(evsel, ncpus, nthreads, filter); |
1010 | if (err) | |
1011 | break; | |
1012 | } | |
1013 | ||
1014 | return err; | |
0a102479 | 1015 | } |
74429964 | 1016 | |
0c21f736 | 1017 | bool perf_evlist__valid_sample_type(struct perf_evlist *evlist) |
74429964 | 1018 | { |
75562573 | 1019 | struct perf_evsel *pos; |
c2a70653 | 1020 | |
75562573 AH |
1021 | if (evlist->nr_entries == 1) |
1022 | return true; | |
1023 | ||
1024 | if (evlist->id_pos < 0 || evlist->is_pos < 0) | |
1025 | return false; | |
1026 | ||
0050f7aa | 1027 | evlist__for_each(evlist, pos) { |
75562573 AH |
1028 | if (pos->id_pos != evlist->id_pos || |
1029 | pos->is_pos != evlist->is_pos) | |
c2a70653 | 1030 | return false; |
74429964 FW |
1031 | } |
1032 | ||
c2a70653 | 1033 | return true; |
74429964 FW |
1034 | } |
1035 | ||
75562573 | 1036 | u64 __perf_evlist__combined_sample_type(struct perf_evlist *evlist) |
c2a70653 | 1037 | { |
75562573 AH |
1038 | struct perf_evsel *evsel; |
1039 | ||
1040 | if (evlist->combined_sample_type) | |
1041 | return evlist->combined_sample_type; | |
1042 | ||
0050f7aa | 1043 | evlist__for_each(evlist, evsel) |
75562573 AH |
1044 | evlist->combined_sample_type |= evsel->attr.sample_type; |
1045 | ||
1046 | return evlist->combined_sample_type; | |
1047 | } | |
1048 | ||
1049 | u64 perf_evlist__combined_sample_type(struct perf_evlist *evlist) | |
1050 | { | |
1051 | evlist->combined_sample_type = 0; | |
1052 | return __perf_evlist__combined_sample_type(evlist); | |
c2a70653 ACM |
1053 | } |
1054 | ||
9ede473c JO |
1055 | bool perf_evlist__valid_read_format(struct perf_evlist *evlist) |
1056 | { | |
1057 | struct perf_evsel *first = perf_evlist__first(evlist), *pos = first; | |
1058 | u64 read_format = first->attr.read_format; | |
1059 | u64 sample_type = first->attr.sample_type; | |
1060 | ||
0050f7aa | 1061 | evlist__for_each(evlist, pos) { |
9ede473c JO |
1062 | if (read_format != pos->attr.read_format) |
1063 | return false; | |
1064 | } | |
1065 | ||
1066 | /* PERF_SAMPLE_READ imples PERF_FORMAT_ID. */ | |
1067 | if ((sample_type & PERF_SAMPLE_READ) && | |
1068 | !(read_format & PERF_FORMAT_ID)) { | |
1069 | return false; | |
1070 | } | |
1071 | ||
1072 | return true; | |
1073 | } | |
1074 | ||
1075 | u64 perf_evlist__read_format(struct perf_evlist *evlist) | |
1076 | { | |
1077 | struct perf_evsel *first = perf_evlist__first(evlist); | |
1078 | return first->attr.read_format; | |
1079 | } | |
1080 | ||
0c21f736 | 1081 | u16 perf_evlist__id_hdr_size(struct perf_evlist *evlist) |
81e36bff | 1082 | { |
0c21f736 | 1083 | struct perf_evsel *first = perf_evlist__first(evlist); |
81e36bff ACM |
1084 | struct perf_sample *data; |
1085 | u64 sample_type; | |
1086 | u16 size = 0; | |
1087 | ||
81e36bff ACM |
1088 | if (!first->attr.sample_id_all) |
1089 | goto out; | |
1090 | ||
1091 | sample_type = first->attr.sample_type; | |
1092 | ||
1093 | if (sample_type & PERF_SAMPLE_TID) | |
1094 | size += sizeof(data->tid) * 2; | |
1095 | ||
1096 | if (sample_type & PERF_SAMPLE_TIME) | |
1097 | size += sizeof(data->time); | |
1098 | ||
1099 | if (sample_type & PERF_SAMPLE_ID) | |
1100 | size += sizeof(data->id); | |
1101 | ||
1102 | if (sample_type & PERF_SAMPLE_STREAM_ID) | |
1103 | size += sizeof(data->stream_id); | |
1104 | ||
1105 | if (sample_type & PERF_SAMPLE_CPU) | |
1106 | size += sizeof(data->cpu) * 2; | |
75562573 AH |
1107 | |
1108 | if (sample_type & PERF_SAMPLE_IDENTIFIER) | |
1109 | size += sizeof(data->id); | |
81e36bff ACM |
1110 | out: |
1111 | return size; | |
1112 | } | |
1113 | ||
0c21f736 | 1114 | bool perf_evlist__valid_sample_id_all(struct perf_evlist *evlist) |
74429964 | 1115 | { |
0c21f736 | 1116 | struct perf_evsel *first = perf_evlist__first(evlist), *pos = first; |
c2a70653 | 1117 | |
0050f7aa | 1118 | evlist__for_each_continue(evlist, pos) { |
c2a70653 ACM |
1119 | if (first->attr.sample_id_all != pos->attr.sample_id_all) |
1120 | return false; | |
74429964 FW |
1121 | } |
1122 | ||
c2a70653 ACM |
1123 | return true; |
1124 | } | |
1125 | ||
0c21f736 | 1126 | bool perf_evlist__sample_id_all(struct perf_evlist *evlist) |
c2a70653 | 1127 | { |
0c21f736 | 1128 | struct perf_evsel *first = perf_evlist__first(evlist); |
c2a70653 | 1129 | return first->attr.sample_id_all; |
74429964 | 1130 | } |
81cce8de ACM |
1131 | |
1132 | void perf_evlist__set_selected(struct perf_evlist *evlist, | |
1133 | struct perf_evsel *evsel) | |
1134 | { | |
1135 | evlist->selected = evsel; | |
1136 | } | |
727ab04e | 1137 | |
a74b4b66 NK |
1138 | void perf_evlist__close(struct perf_evlist *evlist) |
1139 | { | |
1140 | struct perf_evsel *evsel; | |
1141 | int ncpus = cpu_map__nr(evlist->cpus); | |
1142 | int nthreads = thread_map__nr(evlist->threads); | |
8ad9219e | 1143 | int n; |
a74b4b66 | 1144 | |
8ad9219e SE |
1145 | evlist__for_each_reverse(evlist, evsel) { |
1146 | n = evsel->cpus ? evsel->cpus->nr : ncpus; | |
1147 | perf_evsel__close(evsel, n, nthreads); | |
1148 | } | |
a74b4b66 NK |
1149 | } |
1150 | ||
6a4bb04c | 1151 | int perf_evlist__open(struct perf_evlist *evlist) |
727ab04e | 1152 | { |
6a4bb04c | 1153 | struct perf_evsel *evsel; |
a74b4b66 | 1154 | int err; |
727ab04e | 1155 | |
733cd2fe AH |
1156 | perf_evlist__update_id_pos(evlist); |
1157 | ||
0050f7aa | 1158 | evlist__for_each(evlist, evsel) { |
6a4bb04c | 1159 | err = perf_evsel__open(evsel, evlist->cpus, evlist->threads); |
727ab04e ACM |
1160 | if (err < 0) |
1161 | goto out_err; | |
1162 | } | |
1163 | ||
1164 | return 0; | |
1165 | out_err: | |
a74b4b66 | 1166 | perf_evlist__close(evlist); |
41c21a68 | 1167 | errno = -err; |
727ab04e ACM |
1168 | return err; |
1169 | } | |
35b9d88e | 1170 | |
602ad878 | 1171 | int perf_evlist__prepare_workload(struct perf_evlist *evlist, struct target *target, |
55e162ea | 1172 | const char *argv[], bool pipe_output, |
735f7e0b | 1173 | void (*exec_error)(int signo, siginfo_t *info, void *ucontext)) |
35b9d88e ACM |
1174 | { |
1175 | int child_ready_pipe[2], go_pipe[2]; | |
1176 | char bf; | |
1177 | ||
1178 | if (pipe(child_ready_pipe) < 0) { | |
1179 | perror("failed to create 'ready' pipe"); | |
1180 | return -1; | |
1181 | } | |
1182 | ||
1183 | if (pipe(go_pipe) < 0) { | |
1184 | perror("failed to create 'go' pipe"); | |
1185 | goto out_close_ready_pipe; | |
1186 | } | |
1187 | ||
1188 | evlist->workload.pid = fork(); | |
1189 | if (evlist->workload.pid < 0) { | |
1190 | perror("failed to fork"); | |
1191 | goto out_close_pipes; | |
1192 | } | |
1193 | ||
1194 | if (!evlist->workload.pid) { | |
5f1c4225 ACM |
1195 | int ret; |
1196 | ||
119fa3c9 | 1197 | if (pipe_output) |
35b9d88e ACM |
1198 | dup2(2, 1); |
1199 | ||
0817df08 DA |
1200 | signal(SIGTERM, SIG_DFL); |
1201 | ||
35b9d88e ACM |
1202 | close(child_ready_pipe[0]); |
1203 | close(go_pipe[1]); | |
1204 | fcntl(go_pipe[0], F_SETFD, FD_CLOEXEC); | |
1205 | ||
35b9d88e ACM |
1206 | /* |
1207 | * Tell the parent we're ready to go | |
1208 | */ | |
1209 | close(child_ready_pipe[1]); | |
1210 | ||
1211 | /* | |
1212 | * Wait until the parent tells us to go. | |
1213 | */ | |
5f1c4225 ACM |
1214 | ret = read(go_pipe[0], &bf, 1); |
1215 | /* | |
1216 | * The parent will ask for the execvp() to be performed by | |
1217 | * writing exactly one byte, in workload.cork_fd, usually via | |
1218 | * perf_evlist__start_workload(). | |
1219 | * | |
1220 | * For cancelling the workload without actuallin running it, | |
1221 | * the parent will just close workload.cork_fd, without writing | |
1222 | * anything, i.e. read will return zero and we just exit() | |
1223 | * here. | |
1224 | */ | |
1225 | if (ret != 1) { | |
1226 | if (ret == -1) | |
1227 | perror("unable to read pipe"); | |
1228 | exit(ret); | |
1229 | } | |
35b9d88e ACM |
1230 | |
1231 | execvp(argv[0], (char **)argv); | |
1232 | ||
735f7e0b | 1233 | if (exec_error) { |
f33cbe72 ACM |
1234 | union sigval val; |
1235 | ||
1236 | val.sival_int = errno; | |
1237 | if (sigqueue(getppid(), SIGUSR1, val)) | |
1238 | perror(argv[0]); | |
1239 | } else | |
1240 | perror(argv[0]); | |
35b9d88e ACM |
1241 | exit(-1); |
1242 | } | |
1243 | ||
735f7e0b ACM |
1244 | if (exec_error) { |
1245 | struct sigaction act = { | |
1246 | .sa_flags = SA_SIGINFO, | |
1247 | .sa_sigaction = exec_error, | |
1248 | }; | |
1249 | sigaction(SIGUSR1, &act, NULL); | |
1250 | } | |
1251 | ||
602ad878 | 1252 | if (target__none(target)) |
35b9d88e ACM |
1253 | evlist->threads->map[0] = evlist->workload.pid; |
1254 | ||
1255 | close(child_ready_pipe[1]); | |
1256 | close(go_pipe[0]); | |
1257 | /* | |
1258 | * wait for child to settle | |
1259 | */ | |
1260 | if (read(child_ready_pipe[0], &bf, 1) == -1) { | |
1261 | perror("unable to read pipe"); | |
1262 | goto out_close_pipes; | |
1263 | } | |
1264 | ||
bcf3145f | 1265 | fcntl(go_pipe[1], F_SETFD, FD_CLOEXEC); |
35b9d88e ACM |
1266 | evlist->workload.cork_fd = go_pipe[1]; |
1267 | close(child_ready_pipe[0]); | |
1268 | return 0; | |
1269 | ||
1270 | out_close_pipes: | |
1271 | close(go_pipe[0]); | |
1272 | close(go_pipe[1]); | |
1273 | out_close_ready_pipe: | |
1274 | close(child_ready_pipe[0]); | |
1275 | close(child_ready_pipe[1]); | |
1276 | return -1; | |
1277 | } | |
1278 | ||
1279 | int perf_evlist__start_workload(struct perf_evlist *evlist) | |
1280 | { | |
1281 | if (evlist->workload.cork_fd > 0) { | |
b3824404 | 1282 | char bf = 0; |
bcf3145f | 1283 | int ret; |
35b9d88e ACM |
1284 | /* |
1285 | * Remove the cork, let it rip! | |
1286 | */ | |
bcf3145f NK |
1287 | ret = write(evlist->workload.cork_fd, &bf, 1); |
1288 | if (ret < 0) | |
1289 | perror("enable to write to pipe"); | |
1290 | ||
1291 | close(evlist->workload.cork_fd); | |
1292 | return ret; | |
35b9d88e ACM |
1293 | } |
1294 | ||
1295 | return 0; | |
1296 | } | |
cb0b29e0 | 1297 | |
a3f698fe | 1298 | int perf_evlist__parse_sample(struct perf_evlist *evlist, union perf_event *event, |
0807d2d8 | 1299 | struct perf_sample *sample) |
cb0b29e0 | 1300 | { |
75562573 AH |
1301 | struct perf_evsel *evsel = perf_evlist__event2evsel(evlist, event); |
1302 | ||
1303 | if (!evsel) | |
1304 | return -EFAULT; | |
0807d2d8 | 1305 | return perf_evsel__parse_sample(evsel, event, sample); |
cb0b29e0 | 1306 | } |
78f067b3 ACM |
1307 | |
1308 | size_t perf_evlist__fprintf(struct perf_evlist *evlist, FILE *fp) | |
1309 | { | |
1310 | struct perf_evsel *evsel; | |
1311 | size_t printed = 0; | |
1312 | ||
0050f7aa | 1313 | evlist__for_each(evlist, evsel) { |
78f067b3 ACM |
1314 | printed += fprintf(fp, "%s%s", evsel->idx ? ", " : "", |
1315 | perf_evsel__name(evsel)); | |
1316 | } | |
1317 | ||
b2222139 | 1318 | return printed + fprintf(fp, "\n"); |
78f067b3 | 1319 | } |
6ef068cb ACM |
1320 | |
1321 | int perf_evlist__strerror_tp(struct perf_evlist *evlist __maybe_unused, | |
1322 | int err, char *buf, size_t size) | |
1323 | { | |
1324 | char sbuf[128]; | |
1325 | ||
1326 | switch (err) { | |
1327 | case ENOENT: | |
1328 | scnprintf(buf, size, "%s", | |
1329 | "Error:\tUnable to find debugfs\n" | |
1330 | "Hint:\tWas your kernel was compiled with debugfs support?\n" | |
1331 | "Hint:\tIs the debugfs filesystem mounted?\n" | |
1332 | "Hint:\tTry 'sudo mount -t debugfs nodev /sys/kernel/debug'"); | |
1333 | break; | |
1334 | case EACCES: | |
1335 | scnprintf(buf, size, | |
1336 | "Error:\tNo permissions to read %s/tracing/events/raw_syscalls\n" | |
1337 | "Hint:\tTry 'sudo mount -o remount,mode=755 %s'\n", | |
1338 | debugfs_mountpoint, debugfs_mountpoint); | |
1339 | break; | |
1340 | default: | |
1341 | scnprintf(buf, size, "%s", strerror_r(err, sbuf, sizeof(sbuf))); | |
1342 | break; | |
1343 | } | |
1344 | ||
1345 | return 0; | |
1346 | } | |
a8f23d8f ACM |
1347 | |
1348 | int perf_evlist__strerror_open(struct perf_evlist *evlist __maybe_unused, | |
1349 | int err, char *buf, size_t size) | |
1350 | { | |
1351 | int printed, value; | |
6e81c74c | 1352 | char sbuf[STRERR_BUFSIZE], *emsg = strerror_r(err, sbuf, sizeof(sbuf)); |
a8f23d8f ACM |
1353 | |
1354 | switch (err) { | |
1355 | case EACCES: | |
1356 | case EPERM: | |
1357 | printed = scnprintf(buf, size, | |
1358 | "Error:\t%s.\n" | |
1359 | "Hint:\tCheck /proc/sys/kernel/perf_event_paranoid setting.", emsg); | |
1360 | ||
1a47245d | 1361 | value = perf_event_paranoid(); |
a8f23d8f ACM |
1362 | |
1363 | printed += scnprintf(buf + printed, size - printed, "\nHint:\t"); | |
1364 | ||
1365 | if (value >= 2) { | |
1366 | printed += scnprintf(buf + printed, size - printed, | |
1367 | "For your workloads it needs to be <= 1\nHint:\t"); | |
1368 | } | |
1369 | printed += scnprintf(buf + printed, size - printed, | |
5229e366 | 1370 | "For system wide tracing it needs to be set to -1.\n"); |
a8f23d8f ACM |
1371 | |
1372 | printed += scnprintf(buf + printed, size - printed, | |
5229e366 ACM |
1373 | "Hint:\tTry: 'sudo sh -c \"echo -1 > /proc/sys/kernel/perf_event_paranoid\"'\n" |
1374 | "Hint:\tThe current value is %d.", value); | |
a8f23d8f ACM |
1375 | break; |
1376 | default: | |
1377 | scnprintf(buf, size, "%s", emsg); | |
1378 | break; | |
1379 | } | |
1380 | ||
1381 | return 0; | |
1382 | } | |
a025e4f0 AH |
1383 | |
1384 | void perf_evlist__to_front(struct perf_evlist *evlist, | |
1385 | struct perf_evsel *move_evsel) | |
1386 | { | |
1387 | struct perf_evsel *evsel, *n; | |
1388 | LIST_HEAD(move); | |
1389 | ||
1390 | if (move_evsel == perf_evlist__first(evlist)) | |
1391 | return; | |
1392 | ||
0050f7aa | 1393 | evlist__for_each_safe(evlist, n, evsel) { |
a025e4f0 AH |
1394 | if (evsel->leader == move_evsel->leader) |
1395 | list_move_tail(&evsel->node, &move); | |
1396 | } | |
1397 | ||
1398 | list_splice(&move, &evlist->entries); | |
1399 | } | |
60b0896c AH |
1400 | |
1401 | void perf_evlist__set_tracking_event(struct perf_evlist *evlist, | |
1402 | struct perf_evsel *tracking_evsel) | |
1403 | { | |
1404 | struct perf_evsel *evsel; | |
1405 | ||
1406 | if (tracking_evsel->tracking) | |
1407 | return; | |
1408 | ||
1409 | evlist__for_each(evlist, evsel) { | |
1410 | if (evsel != tracking_evsel) | |
1411 | evsel->tracking = false; | |
1412 | } | |
1413 | ||
1414 | tracking_evsel->tracking = true; | |
1415 | } |