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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> |
956fa571 | 11 | #include <api/fs/fs.h> |
5c581041 | 12 | #include <poll.h> |
f8a95309 ACM |
13 | #include "cpumap.h" |
14 | #include "thread_map.h" | |
12864b31 | 15 | #include "target.h" |
361c99a6 ACM |
16 | #include "evlist.h" |
17 | #include "evsel.h" | |
e3e1a54f | 18 | #include "debug.h" |
35b9d88e | 19 | #include <unistd.h> |
361c99a6 | 20 | |
50d08e47 | 21 | #include "parse-events.h" |
994a1f78 | 22 | #include "parse-options.h" |
50d08e47 | 23 | |
f8a95309 ACM |
24 | #include <sys/mman.h> |
25 | ||
70db7533 ACM |
26 | #include <linux/bitops.h> |
27 | #include <linux/hash.h> | |
0389cd1f | 28 | #include <linux/log2.h> |
70db7533 | 29 | |
e4b356b5 ACM |
30 | static void perf_evlist__mmap_put(struct perf_evlist *evlist, int idx); |
31 | static void __perf_evlist__munmap(struct perf_evlist *evlist, int idx); | |
32 | ||
f8a95309 | 33 | #define FD(e, x, y) (*(int *)xyarray__entry(e->fd, x, y)) |
a91e5431 | 34 | #define SID(e, x, y) xyarray__entry(e->sample_id, x, y) |
f8a95309 | 35 | |
7e2ed097 ACM |
36 | void perf_evlist__init(struct perf_evlist *evlist, struct cpu_map *cpus, |
37 | struct thread_map *threads) | |
ef1d1af2 ACM |
38 | { |
39 | int i; | |
40 | ||
41 | for (i = 0; i < PERF_EVLIST__HLIST_SIZE; ++i) | |
42 | INIT_HLIST_HEAD(&evlist->heads[i]); | |
43 | INIT_LIST_HEAD(&evlist->entries); | |
7e2ed097 | 44 | perf_evlist__set_maps(evlist, cpus, threads); |
1b85337d | 45 | fdarray__init(&evlist->pollfd, 64); |
35b9d88e | 46 | evlist->workload.pid = -1; |
ef1d1af2 ACM |
47 | } |
48 | ||
334fe7a3 | 49 | struct perf_evlist *perf_evlist__new(void) |
361c99a6 ACM |
50 | { |
51 | struct perf_evlist *evlist = zalloc(sizeof(*evlist)); | |
52 | ||
ef1d1af2 | 53 | if (evlist != NULL) |
334fe7a3 | 54 | perf_evlist__init(evlist, NULL, NULL); |
361c99a6 ACM |
55 | |
56 | return evlist; | |
57 | } | |
58 | ||
b22d54b0 JO |
59 | struct perf_evlist *perf_evlist__new_default(void) |
60 | { | |
61 | struct perf_evlist *evlist = perf_evlist__new(); | |
62 | ||
63 | if (evlist && perf_evlist__add_default(evlist)) { | |
64 | perf_evlist__delete(evlist); | |
65 | evlist = NULL; | |
66 | } | |
67 | ||
68 | return evlist; | |
69 | } | |
70 | ||
75562573 AH |
71 | /** |
72 | * perf_evlist__set_id_pos - set the positions of event ids. | |
73 | * @evlist: selected event list | |
74 | * | |
75 | * Events with compatible sample types all have the same id_pos | |
76 | * and is_pos. For convenience, put a copy on evlist. | |
77 | */ | |
78 | void perf_evlist__set_id_pos(struct perf_evlist *evlist) | |
79 | { | |
80 | struct perf_evsel *first = perf_evlist__first(evlist); | |
81 | ||
82 | evlist->id_pos = first->id_pos; | |
83 | evlist->is_pos = first->is_pos; | |
84 | } | |
85 | ||
733cd2fe AH |
86 | static void perf_evlist__update_id_pos(struct perf_evlist *evlist) |
87 | { | |
88 | struct perf_evsel *evsel; | |
89 | ||
0050f7aa | 90 | evlist__for_each(evlist, evsel) |
733cd2fe AH |
91 | perf_evsel__calc_id_pos(evsel); |
92 | ||
93 | perf_evlist__set_id_pos(evlist); | |
94 | } | |
95 | ||
361c99a6 ACM |
96 | static void perf_evlist__purge(struct perf_evlist *evlist) |
97 | { | |
98 | struct perf_evsel *pos, *n; | |
99 | ||
0050f7aa | 100 | evlist__for_each_safe(evlist, n, pos) { |
361c99a6 ACM |
101 | list_del_init(&pos->node); |
102 | perf_evsel__delete(pos); | |
103 | } | |
104 | ||
105 | evlist->nr_entries = 0; | |
106 | } | |
107 | ||
ef1d1af2 | 108 | void perf_evlist__exit(struct perf_evlist *evlist) |
361c99a6 | 109 | { |
04662523 | 110 | zfree(&evlist->mmap); |
1b85337d | 111 | fdarray__exit(&evlist->pollfd); |
ef1d1af2 ACM |
112 | } |
113 | ||
114 | void perf_evlist__delete(struct perf_evlist *evlist) | |
115 | { | |
983874d1 | 116 | perf_evlist__munmap(evlist); |
f26e1c7c | 117 | perf_evlist__close(evlist); |
03ad9747 ACM |
118 | cpu_map__delete(evlist->cpus); |
119 | thread_map__delete(evlist->threads); | |
120 | evlist->cpus = NULL; | |
121 | evlist->threads = NULL; | |
ef1d1af2 ACM |
122 | perf_evlist__purge(evlist); |
123 | perf_evlist__exit(evlist); | |
361c99a6 ACM |
124 | free(evlist); |
125 | } | |
126 | ||
127 | void perf_evlist__add(struct perf_evlist *evlist, struct perf_evsel *entry) | |
128 | { | |
129 | list_add_tail(&entry->node, &evlist->entries); | |
ef503831 | 130 | entry->idx = evlist->nr_entries; |
60b0896c | 131 | entry->tracking = !entry->idx; |
ef503831 | 132 | |
75562573 AH |
133 | if (!evlist->nr_entries++) |
134 | perf_evlist__set_id_pos(evlist); | |
361c99a6 ACM |
135 | } |
136 | ||
0529bc1f JO |
137 | void perf_evlist__splice_list_tail(struct perf_evlist *evlist, |
138 | struct list_head *list, | |
139 | int nr_entries) | |
50d08e47 | 140 | { |
75562573 AH |
141 | bool set_id_pos = !evlist->nr_entries; |
142 | ||
50d08e47 ACM |
143 | list_splice_tail(list, &evlist->entries); |
144 | evlist->nr_entries += nr_entries; | |
75562573 AH |
145 | if (set_id_pos) |
146 | perf_evlist__set_id_pos(evlist); | |
50d08e47 ACM |
147 | } |
148 | ||
63dab225 ACM |
149 | void __perf_evlist__set_leader(struct list_head *list) |
150 | { | |
151 | struct perf_evsel *evsel, *leader; | |
152 | ||
153 | leader = list_entry(list->next, struct perf_evsel, node); | |
97f63e4a NK |
154 | evsel = list_entry(list->prev, struct perf_evsel, node); |
155 | ||
156 | leader->nr_members = evsel->idx - leader->idx + 1; | |
63dab225 | 157 | |
0050f7aa | 158 | __evlist__for_each(list, evsel) { |
74b2133d | 159 | evsel->leader = leader; |
63dab225 ACM |
160 | } |
161 | } | |
162 | ||
163 | void perf_evlist__set_leader(struct perf_evlist *evlist) | |
6a4bb04c | 164 | { |
97f63e4a NK |
165 | if (evlist->nr_entries) { |
166 | evlist->nr_groups = evlist->nr_entries > 1 ? 1 : 0; | |
63dab225 | 167 | __perf_evlist__set_leader(&evlist->entries); |
97f63e4a | 168 | } |
6a4bb04c JO |
169 | } |
170 | ||
361c99a6 ACM |
171 | int perf_evlist__add_default(struct perf_evlist *evlist) |
172 | { | |
173 | struct perf_event_attr attr = { | |
174 | .type = PERF_TYPE_HARDWARE, | |
175 | .config = PERF_COUNT_HW_CPU_CYCLES, | |
176 | }; | |
1aed2671 JR |
177 | struct perf_evsel *evsel; |
178 | ||
179 | event_attr_init(&attr); | |
361c99a6 | 180 | |
ef503831 | 181 | evsel = perf_evsel__new(&attr); |
361c99a6 | 182 | if (evsel == NULL) |
cc2d86b0 SE |
183 | goto error; |
184 | ||
185 | /* use strdup() because free(evsel) assumes name is allocated */ | |
186 | evsel->name = strdup("cycles"); | |
187 | if (!evsel->name) | |
188 | goto error_free; | |
361c99a6 ACM |
189 | |
190 | perf_evlist__add(evlist, evsel); | |
191 | return 0; | |
cc2d86b0 SE |
192 | error_free: |
193 | perf_evsel__delete(evsel); | |
194 | error: | |
195 | return -ENOMEM; | |
361c99a6 | 196 | } |
5c581041 | 197 | |
e60fc847 ACM |
198 | static int perf_evlist__add_attrs(struct perf_evlist *evlist, |
199 | struct perf_event_attr *attrs, size_t nr_attrs) | |
50d08e47 ACM |
200 | { |
201 | struct perf_evsel *evsel, *n; | |
202 | LIST_HEAD(head); | |
203 | size_t i; | |
204 | ||
205 | for (i = 0; i < nr_attrs; i++) { | |
ef503831 | 206 | evsel = perf_evsel__new_idx(attrs + i, evlist->nr_entries + i); |
50d08e47 ACM |
207 | if (evsel == NULL) |
208 | goto out_delete_partial_list; | |
209 | list_add_tail(&evsel->node, &head); | |
210 | } | |
211 | ||
212 | perf_evlist__splice_list_tail(evlist, &head, nr_attrs); | |
213 | ||
214 | return 0; | |
215 | ||
216 | out_delete_partial_list: | |
0050f7aa | 217 | __evlist__for_each_safe(&head, n, evsel) |
50d08e47 ACM |
218 | perf_evsel__delete(evsel); |
219 | return -1; | |
220 | } | |
221 | ||
79695e1b ACM |
222 | int __perf_evlist__add_default_attrs(struct perf_evlist *evlist, |
223 | struct perf_event_attr *attrs, size_t nr_attrs) | |
224 | { | |
225 | size_t i; | |
226 | ||
227 | for (i = 0; i < nr_attrs; i++) | |
228 | event_attr_init(attrs + i); | |
229 | ||
230 | return perf_evlist__add_attrs(evlist, attrs, nr_attrs); | |
231 | } | |
232 | ||
da378962 ACM |
233 | struct perf_evsel * |
234 | perf_evlist__find_tracepoint_by_id(struct perf_evlist *evlist, int id) | |
ee29be62 ACM |
235 | { |
236 | struct perf_evsel *evsel; | |
237 | ||
0050f7aa | 238 | evlist__for_each(evlist, evsel) { |
ee29be62 ACM |
239 | if (evsel->attr.type == PERF_TYPE_TRACEPOINT && |
240 | (int)evsel->attr.config == id) | |
241 | return evsel; | |
242 | } | |
243 | ||
244 | return NULL; | |
245 | } | |
246 | ||
a2f2804a DA |
247 | struct perf_evsel * |
248 | perf_evlist__find_tracepoint_by_name(struct perf_evlist *evlist, | |
249 | const char *name) | |
250 | { | |
251 | struct perf_evsel *evsel; | |
252 | ||
0050f7aa | 253 | evlist__for_each(evlist, evsel) { |
a2f2804a DA |
254 | if ((evsel->attr.type == PERF_TYPE_TRACEPOINT) && |
255 | (strcmp(evsel->name, name) == 0)) | |
256 | return evsel; | |
257 | } | |
258 | ||
259 | return NULL; | |
260 | } | |
261 | ||
39876e7d ACM |
262 | int perf_evlist__add_newtp(struct perf_evlist *evlist, |
263 | const char *sys, const char *name, void *handler) | |
264 | { | |
ef503831 | 265 | struct perf_evsel *evsel = perf_evsel__newtp(sys, name); |
39876e7d | 266 | |
39876e7d ACM |
267 | if (evsel == NULL) |
268 | return -1; | |
269 | ||
744a9719 | 270 | evsel->handler = handler; |
39876e7d ACM |
271 | perf_evlist__add(evlist, evsel); |
272 | return 0; | |
273 | } | |
274 | ||
bf8e8f4b AH |
275 | static int perf_evlist__nr_threads(struct perf_evlist *evlist, |
276 | struct perf_evsel *evsel) | |
277 | { | |
278 | if (evsel->system_wide) | |
279 | return 1; | |
280 | else | |
281 | return thread_map__nr(evlist->threads); | |
282 | } | |
283 | ||
4152ab37 ACM |
284 | void perf_evlist__disable(struct perf_evlist *evlist) |
285 | { | |
286 | int cpu, thread; | |
287 | struct perf_evsel *pos; | |
b3a319d5 | 288 | int nr_cpus = cpu_map__nr(evlist->cpus); |
bf8e8f4b | 289 | int nr_threads; |
4152ab37 | 290 | |
b3a319d5 | 291 | for (cpu = 0; cpu < nr_cpus; cpu++) { |
0050f7aa | 292 | evlist__for_each(evlist, pos) { |
395c3070 | 293 | if (!perf_evsel__is_group_leader(pos) || !pos->fd) |
3fe4430d | 294 | continue; |
bf8e8f4b | 295 | nr_threads = perf_evlist__nr_threads(evlist, pos); |
b3a319d5 | 296 | for (thread = 0; thread < nr_threads; thread++) |
55da8005 NK |
297 | ioctl(FD(pos, cpu, thread), |
298 | PERF_EVENT_IOC_DISABLE, 0); | |
4152ab37 ACM |
299 | } |
300 | } | |
301 | } | |
302 | ||
764e16a3 DA |
303 | void perf_evlist__enable(struct perf_evlist *evlist) |
304 | { | |
305 | int cpu, thread; | |
306 | struct perf_evsel *pos; | |
b3a319d5 | 307 | int nr_cpus = cpu_map__nr(evlist->cpus); |
bf8e8f4b | 308 | int nr_threads; |
764e16a3 | 309 | |
b3a319d5 | 310 | for (cpu = 0; cpu < nr_cpus; cpu++) { |
0050f7aa | 311 | evlist__for_each(evlist, pos) { |
395c3070 | 312 | if (!perf_evsel__is_group_leader(pos) || !pos->fd) |
3fe4430d | 313 | continue; |
bf8e8f4b | 314 | nr_threads = perf_evlist__nr_threads(evlist, pos); |
b3a319d5 | 315 | for (thread = 0; thread < nr_threads; thread++) |
55da8005 NK |
316 | ioctl(FD(pos, cpu, thread), |
317 | PERF_EVENT_IOC_ENABLE, 0); | |
764e16a3 DA |
318 | } |
319 | } | |
320 | } | |
321 | ||
395c3070 AH |
322 | int perf_evlist__disable_event(struct perf_evlist *evlist, |
323 | struct perf_evsel *evsel) | |
324 | { | |
325 | int cpu, thread, err; | |
bf8e8f4b AH |
326 | int nr_cpus = cpu_map__nr(evlist->cpus); |
327 | int nr_threads = perf_evlist__nr_threads(evlist, evsel); | |
395c3070 AH |
328 | |
329 | if (!evsel->fd) | |
330 | return 0; | |
331 | ||
bf8e8f4b AH |
332 | for (cpu = 0; cpu < nr_cpus; cpu++) { |
333 | for (thread = 0; thread < nr_threads; thread++) { | |
395c3070 AH |
334 | err = ioctl(FD(evsel, cpu, thread), |
335 | PERF_EVENT_IOC_DISABLE, 0); | |
336 | if (err) | |
337 | return err; | |
338 | } | |
339 | } | |
340 | return 0; | |
341 | } | |
342 | ||
343 | int perf_evlist__enable_event(struct perf_evlist *evlist, | |
344 | struct perf_evsel *evsel) | |
345 | { | |
346 | int cpu, thread, err; | |
bf8e8f4b AH |
347 | int nr_cpus = cpu_map__nr(evlist->cpus); |
348 | int nr_threads = perf_evlist__nr_threads(evlist, evsel); | |
395c3070 AH |
349 | |
350 | if (!evsel->fd) | |
351 | return -EINVAL; | |
352 | ||
bf8e8f4b AH |
353 | for (cpu = 0; cpu < nr_cpus; cpu++) { |
354 | for (thread = 0; thread < nr_threads; thread++) { | |
395c3070 AH |
355 | err = ioctl(FD(evsel, cpu, thread), |
356 | PERF_EVENT_IOC_ENABLE, 0); | |
357 | if (err) | |
358 | return err; | |
359 | } | |
360 | } | |
361 | return 0; | |
362 | } | |
363 | ||
1c65056c AH |
364 | static int perf_evlist__enable_event_cpu(struct perf_evlist *evlist, |
365 | struct perf_evsel *evsel, int cpu) | |
366 | { | |
367 | int thread, err; | |
368 | int nr_threads = perf_evlist__nr_threads(evlist, evsel); | |
369 | ||
370 | if (!evsel->fd) | |
371 | return -EINVAL; | |
372 | ||
373 | for (thread = 0; thread < nr_threads; thread++) { | |
374 | err = ioctl(FD(evsel, cpu, thread), | |
375 | PERF_EVENT_IOC_ENABLE, 0); | |
376 | if (err) | |
377 | return err; | |
378 | } | |
379 | return 0; | |
380 | } | |
381 | ||
382 | static int perf_evlist__enable_event_thread(struct perf_evlist *evlist, | |
383 | struct perf_evsel *evsel, | |
384 | int thread) | |
385 | { | |
386 | int cpu, err; | |
387 | int nr_cpus = cpu_map__nr(evlist->cpus); | |
388 | ||
389 | if (!evsel->fd) | |
390 | return -EINVAL; | |
391 | ||
392 | for (cpu = 0; cpu < nr_cpus; cpu++) { | |
393 | err = ioctl(FD(evsel, cpu, thread), PERF_EVENT_IOC_ENABLE, 0); | |
394 | if (err) | |
395 | return err; | |
396 | } | |
397 | return 0; | |
398 | } | |
399 | ||
400 | int perf_evlist__enable_event_idx(struct perf_evlist *evlist, | |
401 | struct perf_evsel *evsel, int idx) | |
402 | { | |
403 | bool per_cpu_mmaps = !cpu_map__empty(evlist->cpus); | |
404 | ||
405 | if (per_cpu_mmaps) | |
406 | return perf_evlist__enable_event_cpu(evlist, evsel, idx); | |
407 | else | |
408 | return perf_evlist__enable_event_thread(evlist, evsel, idx); | |
409 | } | |
410 | ||
ad6765dd | 411 | int perf_evlist__alloc_pollfd(struct perf_evlist *evlist) |
5c581041 | 412 | { |
b3a319d5 NK |
413 | int nr_cpus = cpu_map__nr(evlist->cpus); |
414 | int nr_threads = thread_map__nr(evlist->threads); | |
bf8e8f4b AH |
415 | int nfds = 0; |
416 | struct perf_evsel *evsel; | |
417 | ||
cba9b847 | 418 | evlist__for_each(evlist, evsel) { |
bf8e8f4b AH |
419 | if (evsel->system_wide) |
420 | nfds += nr_cpus; | |
421 | else | |
422 | nfds += nr_cpus * nr_threads; | |
423 | } | |
424 | ||
1b85337d ACM |
425 | if (fdarray__available_entries(&evlist->pollfd) < nfds && |
426 | fdarray__grow(&evlist->pollfd, nfds) < 0) | |
ad6765dd ACM |
427 | return -ENOMEM; |
428 | ||
429 | return 0; | |
5c581041 | 430 | } |
70082dd9 | 431 | |
e4b356b5 ACM |
432 | static int __perf_evlist__add_pollfd(struct perf_evlist *evlist, int fd, int idx) |
433 | { | |
434 | int pos = fdarray__add(&evlist->pollfd, fd, POLLIN | POLLERR | POLLHUP); | |
435 | /* | |
436 | * Save the idx so that when we filter out fds POLLHUP'ed we can | |
437 | * close the associated evlist->mmap[] entry. | |
438 | */ | |
439 | if (pos >= 0) { | |
440 | evlist->pollfd.priv[pos].idx = idx; | |
441 | ||
442 | fcntl(fd, F_SETFL, O_NONBLOCK); | |
443 | } | |
444 | ||
445 | return pos; | |
446 | } | |
447 | ||
ad6765dd | 448 | int perf_evlist__add_pollfd(struct perf_evlist *evlist, int fd) |
70082dd9 | 449 | { |
e4b356b5 ACM |
450 | return __perf_evlist__add_pollfd(evlist, fd, -1); |
451 | } | |
452 | ||
453 | static void perf_evlist__munmap_filtered(struct fdarray *fda, int fd) | |
454 | { | |
455 | struct perf_evlist *evlist = container_of(fda, struct perf_evlist, pollfd); | |
1b85337d | 456 | |
e4b356b5 | 457 | perf_evlist__mmap_put(evlist, fda->priv[fd].idx); |
70082dd9 | 458 | } |
70db7533 | 459 | |
1ddec7f0 ACM |
460 | int perf_evlist__filter_pollfd(struct perf_evlist *evlist, short revents_and_mask) |
461 | { | |
e4b356b5 ACM |
462 | return fdarray__filter(&evlist->pollfd, revents_and_mask, |
463 | perf_evlist__munmap_filtered); | |
1ddec7f0 ACM |
464 | } |
465 | ||
f66a889d ACM |
466 | int perf_evlist__poll(struct perf_evlist *evlist, int timeout) |
467 | { | |
1b85337d | 468 | return fdarray__poll(&evlist->pollfd, timeout); |
f66a889d ACM |
469 | } |
470 | ||
a91e5431 ACM |
471 | static void perf_evlist__id_hash(struct perf_evlist *evlist, |
472 | struct perf_evsel *evsel, | |
473 | int cpu, int thread, u64 id) | |
3d3b5e95 ACM |
474 | { |
475 | int hash; | |
476 | struct perf_sample_id *sid = SID(evsel, cpu, thread); | |
477 | ||
478 | sid->id = id; | |
479 | sid->evsel = evsel; | |
480 | hash = hash_64(sid->id, PERF_EVLIST__HLIST_BITS); | |
481 | hlist_add_head(&sid->node, &evlist->heads[hash]); | |
482 | } | |
483 | ||
a91e5431 ACM |
484 | void perf_evlist__id_add(struct perf_evlist *evlist, struct perf_evsel *evsel, |
485 | int cpu, int thread, u64 id) | |
486 | { | |
487 | perf_evlist__id_hash(evlist, evsel, cpu, thread, id); | |
488 | evsel->id[evsel->ids++] = id; | |
489 | } | |
490 | ||
491 | static int perf_evlist__id_add_fd(struct perf_evlist *evlist, | |
492 | struct perf_evsel *evsel, | |
493 | int cpu, int thread, int fd) | |
f8a95309 | 494 | { |
f8a95309 | 495 | u64 read_data[4] = { 0, }; |
3d3b5e95 | 496 | int id_idx = 1; /* The first entry is the counter value */ |
e2b5abe0 JO |
497 | u64 id; |
498 | int ret; | |
499 | ||
500 | ret = ioctl(fd, PERF_EVENT_IOC_ID, &id); | |
501 | if (!ret) | |
502 | goto add; | |
503 | ||
504 | if (errno != ENOTTY) | |
505 | return -1; | |
506 | ||
507 | /* Legacy way to get event id.. All hail to old kernels! */ | |
f8a95309 | 508 | |
c4861afe JO |
509 | /* |
510 | * This way does not work with group format read, so bail | |
511 | * out in that case. | |
512 | */ | |
513 | if (perf_evlist__read_format(evlist) & PERF_FORMAT_GROUP) | |
514 | return -1; | |
515 | ||
f8a95309 ACM |
516 | if (!(evsel->attr.read_format & PERF_FORMAT_ID) || |
517 | read(fd, &read_data, sizeof(read_data)) == -1) | |
518 | return -1; | |
519 | ||
520 | if (evsel->attr.read_format & PERF_FORMAT_TOTAL_TIME_ENABLED) | |
521 | ++id_idx; | |
522 | if (evsel->attr.read_format & PERF_FORMAT_TOTAL_TIME_RUNNING) | |
523 | ++id_idx; | |
524 | ||
e2b5abe0 JO |
525 | id = read_data[id_idx]; |
526 | ||
527 | add: | |
528 | perf_evlist__id_add(evlist, evsel, cpu, thread, id); | |
f8a95309 ACM |
529 | return 0; |
530 | } | |
531 | ||
3c659eed AH |
532 | static void perf_evlist__set_sid_idx(struct perf_evlist *evlist, |
533 | struct perf_evsel *evsel, int idx, int cpu, | |
534 | int thread) | |
535 | { | |
536 | struct perf_sample_id *sid = SID(evsel, cpu, thread); | |
537 | sid->idx = idx; | |
538 | if (evlist->cpus && cpu >= 0) | |
539 | sid->cpu = evlist->cpus->map[cpu]; | |
540 | else | |
541 | sid->cpu = -1; | |
542 | if (!evsel->system_wide && evlist->threads && thread >= 0) | |
543 | sid->tid = evlist->threads->map[thread]; | |
544 | else | |
545 | sid->tid = -1; | |
546 | } | |
547 | ||
932a3594 | 548 | struct perf_sample_id *perf_evlist__id2sid(struct perf_evlist *evlist, u64 id) |
70db7533 ACM |
549 | { |
550 | struct hlist_head *head; | |
70db7533 ACM |
551 | struct perf_sample_id *sid; |
552 | int hash; | |
553 | ||
70db7533 ACM |
554 | hash = hash_64(id, PERF_EVLIST__HLIST_BITS); |
555 | head = &evlist->heads[hash]; | |
556 | ||
b67bfe0d | 557 | hlist_for_each_entry(sid, head, node) |
70db7533 | 558 | if (sid->id == id) |
932a3594 JO |
559 | return sid; |
560 | ||
561 | return NULL; | |
562 | } | |
563 | ||
564 | struct perf_evsel *perf_evlist__id2evsel(struct perf_evlist *evlist, u64 id) | |
565 | { | |
566 | struct perf_sample_id *sid; | |
567 | ||
568 | if (evlist->nr_entries == 1) | |
569 | return perf_evlist__first(evlist); | |
570 | ||
571 | sid = perf_evlist__id2sid(evlist, id); | |
572 | if (sid) | |
573 | return sid->evsel; | |
30e68bcc NK |
574 | |
575 | if (!perf_evlist__sample_id_all(evlist)) | |
0c21f736 | 576 | return perf_evlist__first(evlist); |
30e68bcc | 577 | |
70db7533 ACM |
578 | return NULL; |
579 | } | |
04391deb | 580 | |
75562573 AH |
581 | static int perf_evlist__event2id(struct perf_evlist *evlist, |
582 | union perf_event *event, u64 *id) | |
583 | { | |
584 | const u64 *array = event->sample.array; | |
585 | ssize_t n; | |
586 | ||
587 | n = (event->header.size - sizeof(event->header)) >> 3; | |
588 | ||
589 | if (event->header.type == PERF_RECORD_SAMPLE) { | |
590 | if (evlist->id_pos >= n) | |
591 | return -1; | |
592 | *id = array[evlist->id_pos]; | |
593 | } else { | |
594 | if (evlist->is_pos > n) | |
595 | return -1; | |
596 | n -= evlist->is_pos; | |
597 | *id = array[n]; | |
598 | } | |
599 | return 0; | |
600 | } | |
601 | ||
602 | static struct perf_evsel *perf_evlist__event2evsel(struct perf_evlist *evlist, | |
603 | union perf_event *event) | |
604 | { | |
98be6966 | 605 | struct perf_evsel *first = perf_evlist__first(evlist); |
75562573 AH |
606 | struct hlist_head *head; |
607 | struct perf_sample_id *sid; | |
608 | int hash; | |
609 | u64 id; | |
610 | ||
611 | if (evlist->nr_entries == 1) | |
98be6966 AH |
612 | return first; |
613 | ||
614 | if (!first->attr.sample_id_all && | |
615 | event->header.type != PERF_RECORD_SAMPLE) | |
616 | return first; | |
75562573 AH |
617 | |
618 | if (perf_evlist__event2id(evlist, event, &id)) | |
619 | return NULL; | |
620 | ||
621 | /* Synthesized events have an id of zero */ | |
622 | if (!id) | |
98be6966 | 623 | return first; |
75562573 AH |
624 | |
625 | hash = hash_64(id, PERF_EVLIST__HLIST_BITS); | |
626 | head = &evlist->heads[hash]; | |
627 | ||
628 | hlist_for_each_entry(sid, head, node) { | |
629 | if (sid->id == id) | |
630 | return sid->evsel; | |
631 | } | |
632 | return NULL; | |
633 | } | |
634 | ||
aece948f | 635 | union perf_event *perf_evlist__mmap_read(struct perf_evlist *evlist, int idx) |
04391deb | 636 | { |
aece948f | 637 | struct perf_mmap *md = &evlist->mmap[idx]; |
04391deb ACM |
638 | unsigned int head = perf_mmap__read_head(md); |
639 | unsigned int old = md->prev; | |
640 | unsigned char *data = md->base + page_size; | |
8115d60c | 641 | union perf_event *event = NULL; |
04391deb | 642 | |
7bb41152 | 643 | if (evlist->overwrite) { |
04391deb | 644 | /* |
7bb41152 ACM |
645 | * If we're further behind than half the buffer, there's a chance |
646 | * the writer will bite our tail and mess up the samples under us. | |
647 | * | |
648 | * If we somehow ended up ahead of the head, we got messed up. | |
649 | * | |
650 | * In either case, truncate and restart at head. | |
04391deb | 651 | */ |
7bb41152 ACM |
652 | int diff = head - old; |
653 | if (diff > md->mask / 2 || diff < 0) { | |
654 | fprintf(stderr, "WARNING: failed to keep up with mmap data.\n"); | |
655 | ||
656 | /* | |
657 | * head points to a known good entry, start there. | |
658 | */ | |
659 | old = head; | |
660 | } | |
04391deb ACM |
661 | } |
662 | ||
663 | if (old != head) { | |
664 | size_t size; | |
665 | ||
8115d60c | 666 | event = (union perf_event *)&data[old & md->mask]; |
04391deb ACM |
667 | size = event->header.size; |
668 | ||
669 | /* | |
670 | * Event straddles the mmap boundary -- header should always | |
671 | * be inside due to u64 alignment of output. | |
672 | */ | |
673 | if ((old & md->mask) + size != ((old + size) & md->mask)) { | |
674 | unsigned int offset = old; | |
675 | unsigned int len = min(sizeof(*event), size), cpy; | |
a65cb4b9 | 676 | void *dst = md->event_copy; |
04391deb ACM |
677 | |
678 | do { | |
679 | cpy = min(md->mask + 1 - (offset & md->mask), len); | |
680 | memcpy(dst, &data[offset & md->mask], cpy); | |
681 | offset += cpy; | |
682 | dst += cpy; | |
683 | len -= cpy; | |
684 | } while (len); | |
685 | ||
a65cb4b9 | 686 | event = (union perf_event *) md->event_copy; |
04391deb ACM |
687 | } |
688 | ||
689 | old += size; | |
690 | } | |
691 | ||
692 | md->prev = old; | |
7bb41152 | 693 | |
04391deb ACM |
694 | return event; |
695 | } | |
f8a95309 | 696 | |
82396986 ACM |
697 | static bool perf_mmap__empty(struct perf_mmap *md) |
698 | { | |
699 | return perf_mmap__read_head(md) != md->prev; | |
700 | } | |
701 | ||
702 | static void perf_evlist__mmap_get(struct perf_evlist *evlist, int idx) | |
703 | { | |
704 | ++evlist->mmap[idx].refcnt; | |
705 | } | |
706 | ||
707 | static void perf_evlist__mmap_put(struct perf_evlist *evlist, int idx) | |
708 | { | |
709 | BUG_ON(evlist->mmap[idx].refcnt == 0); | |
710 | ||
711 | if (--evlist->mmap[idx].refcnt == 0) | |
712 | __perf_evlist__munmap(evlist, idx); | |
713 | } | |
714 | ||
8e50d384 ZZ |
715 | void perf_evlist__mmap_consume(struct perf_evlist *evlist, int idx) |
716 | { | |
82396986 ACM |
717 | struct perf_mmap *md = &evlist->mmap[idx]; |
718 | ||
8e50d384 | 719 | if (!evlist->overwrite) { |
8e50d384 ZZ |
720 | unsigned int old = md->prev; |
721 | ||
722 | perf_mmap__write_tail(md, old); | |
723 | } | |
82396986 ACM |
724 | |
725 | if (md->refcnt == 1 && perf_mmap__empty(md)) | |
726 | perf_evlist__mmap_put(evlist, idx); | |
8e50d384 ZZ |
727 | } |
728 | ||
93edcbd9 AH |
729 | static void __perf_evlist__munmap(struct perf_evlist *evlist, int idx) |
730 | { | |
731 | if (evlist->mmap[idx].base != NULL) { | |
732 | munmap(evlist->mmap[idx].base, evlist->mmap_len); | |
733 | evlist->mmap[idx].base = NULL; | |
82396986 | 734 | evlist->mmap[idx].refcnt = 0; |
93edcbd9 AH |
735 | } |
736 | } | |
737 | ||
7e2ed097 | 738 | void perf_evlist__munmap(struct perf_evlist *evlist) |
f8a95309 | 739 | { |
aece948f | 740 | int i; |
f8a95309 | 741 | |
983874d1 ACM |
742 | if (evlist->mmap == NULL) |
743 | return; | |
744 | ||
93edcbd9 AH |
745 | for (i = 0; i < evlist->nr_mmaps; i++) |
746 | __perf_evlist__munmap(evlist, i); | |
aece948f | 747 | |
04662523 | 748 | zfree(&evlist->mmap); |
f8a95309 ACM |
749 | } |
750 | ||
806fb630 | 751 | static int perf_evlist__alloc_mmap(struct perf_evlist *evlist) |
f8a95309 | 752 | { |
a14bb7a6 | 753 | evlist->nr_mmaps = cpu_map__nr(evlist->cpus); |
ec1e7e43 | 754 | if (cpu_map__empty(evlist->cpus)) |
b3a319d5 | 755 | evlist->nr_mmaps = thread_map__nr(evlist->threads); |
aece948f | 756 | evlist->mmap = zalloc(evlist->nr_mmaps * sizeof(struct perf_mmap)); |
f8a95309 ACM |
757 | return evlist->mmap != NULL ? 0 : -ENOMEM; |
758 | } | |
759 | ||
a8a8f3eb AH |
760 | struct mmap_params { |
761 | int prot; | |
762 | int mask; | |
763 | }; | |
764 | ||
765 | static int __perf_evlist__mmap(struct perf_evlist *evlist, int idx, | |
766 | struct mmap_params *mp, int fd) | |
f8a95309 | 767 | { |
82396986 ACM |
768 | /* |
769 | * The last one will be done at perf_evlist__mmap_consume(), so that we | |
770 | * make sure we don't prevent tools from consuming every last event in | |
771 | * the ring buffer. | |
772 | * | |
773 | * I.e. we can get the POLLHUP meaning that the fd doesn't exist | |
774 | * anymore, but the last events for it are still in the ring buffer, | |
775 | * waiting to be consumed. | |
776 | * | |
777 | * Tools can chose to ignore this at their own discretion, but the | |
778 | * evlist layer can't just drop it when filtering events in | |
779 | * perf_evlist__filter_pollfd(). | |
780 | */ | |
781 | evlist->mmap[idx].refcnt = 2; | |
aece948f | 782 | evlist->mmap[idx].prev = 0; |
a8a8f3eb AH |
783 | evlist->mmap[idx].mask = mp->mask; |
784 | evlist->mmap[idx].base = mmap(NULL, evlist->mmap_len, mp->prot, | |
f8a95309 | 785 | MAP_SHARED, fd, 0); |
301b195d | 786 | if (evlist->mmap[idx].base == MAP_FAILED) { |
02635965 AH |
787 | pr_debug2("failed to mmap perf event ring buffer, error %d\n", |
788 | errno); | |
301b195d | 789 | evlist->mmap[idx].base = NULL; |
f8a95309 | 790 | return -1; |
301b195d | 791 | } |
ad6765dd | 792 | |
f8a95309 ACM |
793 | return 0; |
794 | } | |
795 | ||
04e21314 | 796 | static int perf_evlist__mmap_per_evsel(struct perf_evlist *evlist, int idx, |
a8a8f3eb AH |
797 | struct mmap_params *mp, int cpu, |
798 | int thread, int *output) | |
aece948f ACM |
799 | { |
800 | struct perf_evsel *evsel; | |
04e21314 | 801 | |
0050f7aa | 802 | evlist__for_each(evlist, evsel) { |
bf8e8f4b AH |
803 | int fd; |
804 | ||
805 | if (evsel->system_wide && thread) | |
806 | continue; | |
807 | ||
808 | fd = FD(evsel, cpu, thread); | |
04e21314 AH |
809 | |
810 | if (*output == -1) { | |
811 | *output = fd; | |
a8a8f3eb | 812 | if (__perf_evlist__mmap(evlist, idx, mp, *output) < 0) |
04e21314 AH |
813 | return -1; |
814 | } else { | |
815 | if (ioctl(fd, PERF_EVENT_IOC_SET_OUTPUT, *output) != 0) | |
816 | return -1; | |
82396986 ACM |
817 | |
818 | perf_evlist__mmap_get(evlist, idx); | |
04e21314 AH |
819 | } |
820 | ||
f90d194a AH |
821 | /* |
822 | * The system_wide flag causes a selected event to be opened | |
823 | * always without a pid. Consequently it will never get a | |
824 | * POLLHUP, but it is used for tracking in combination with | |
825 | * other events, so it should not need to be polled anyway. | |
826 | * Therefore don't add it for polling. | |
827 | */ | |
828 | if (!evsel->system_wide && | |
829 | __perf_evlist__add_pollfd(evlist, fd, idx) < 0) { | |
82396986 | 830 | perf_evlist__mmap_put(evlist, idx); |
ad6765dd | 831 | return -1; |
82396986 | 832 | } |
033fa713 | 833 | |
3c659eed AH |
834 | if (evsel->attr.read_format & PERF_FORMAT_ID) { |
835 | if (perf_evlist__id_add_fd(evlist, evsel, cpu, thread, | |
836 | fd) < 0) | |
837 | return -1; | |
838 | perf_evlist__set_sid_idx(evlist, evsel, idx, cpu, | |
839 | thread); | |
840 | } | |
04e21314 AH |
841 | } |
842 | ||
843 | return 0; | |
844 | } | |
845 | ||
a8a8f3eb AH |
846 | static int perf_evlist__mmap_per_cpu(struct perf_evlist *evlist, |
847 | struct mmap_params *mp) | |
04e21314 | 848 | { |
aece948f | 849 | int cpu, thread; |
b3a319d5 NK |
850 | int nr_cpus = cpu_map__nr(evlist->cpus); |
851 | int nr_threads = thread_map__nr(evlist->threads); | |
aece948f | 852 | |
e3e1a54f | 853 | pr_debug2("perf event ring buffer mmapped per cpu\n"); |
b3a319d5 | 854 | for (cpu = 0; cpu < nr_cpus; cpu++) { |
aece948f ACM |
855 | int output = -1; |
856 | ||
b3a319d5 | 857 | for (thread = 0; thread < nr_threads; thread++) { |
a8a8f3eb AH |
858 | if (perf_evlist__mmap_per_evsel(evlist, cpu, mp, cpu, |
859 | thread, &output)) | |
04e21314 | 860 | goto out_unmap; |
aece948f ACM |
861 | } |
862 | } | |
863 | ||
864 | return 0; | |
865 | ||
866 | out_unmap: | |
93edcbd9 AH |
867 | for (cpu = 0; cpu < nr_cpus; cpu++) |
868 | __perf_evlist__munmap(evlist, cpu); | |
aece948f ACM |
869 | return -1; |
870 | } | |
871 | ||
a8a8f3eb AH |
872 | static int perf_evlist__mmap_per_thread(struct perf_evlist *evlist, |
873 | struct mmap_params *mp) | |
aece948f | 874 | { |
aece948f | 875 | int thread; |
b3a319d5 | 876 | int nr_threads = thread_map__nr(evlist->threads); |
aece948f | 877 | |
e3e1a54f | 878 | pr_debug2("perf event ring buffer mmapped per thread\n"); |
b3a319d5 | 879 | for (thread = 0; thread < nr_threads; thread++) { |
aece948f ACM |
880 | int output = -1; |
881 | ||
a8a8f3eb AH |
882 | if (perf_evlist__mmap_per_evsel(evlist, thread, mp, 0, thread, |
883 | &output)) | |
04e21314 | 884 | goto out_unmap; |
aece948f ACM |
885 | } |
886 | ||
887 | return 0; | |
888 | ||
889 | out_unmap: | |
93edcbd9 AH |
890 | for (thread = 0; thread < nr_threads; thread++) |
891 | __perf_evlist__munmap(evlist, thread); | |
aece948f ACM |
892 | return -1; |
893 | } | |
894 | ||
994a1f78 JO |
895 | static size_t perf_evlist__mmap_size(unsigned long pages) |
896 | { | |
8185e881 ACM |
897 | if (pages == UINT_MAX) { |
898 | int max; | |
899 | ||
900 | if (sysctl__read_int("kernel/perf_event_mlock_kb", &max) < 0) { | |
901 | /* | |
902 | * Pick a once upon a time good value, i.e. things look | |
903 | * strange since we can't read a sysctl value, but lets not | |
904 | * die yet... | |
905 | */ | |
906 | max = 512; | |
907 | } else { | |
908 | max -= (page_size / 1024); | |
909 | } | |
910 | ||
911 | pages = (max * 1024) / page_size; | |
912 | } else if (!is_power_of_2(pages)) | |
994a1f78 JO |
913 | return 0; |
914 | ||
915 | return (pages + 1) * page_size; | |
916 | } | |
917 | ||
33c2dcfd DA |
918 | static long parse_pages_arg(const char *str, unsigned long min, |
919 | unsigned long max) | |
994a1f78 | 920 | { |
2fbe4abe | 921 | unsigned long pages, val; |
27050f53 JO |
922 | static struct parse_tag tags[] = { |
923 | { .tag = 'B', .mult = 1 }, | |
924 | { .tag = 'K', .mult = 1 << 10 }, | |
925 | { .tag = 'M', .mult = 1 << 20 }, | |
926 | { .tag = 'G', .mult = 1 << 30 }, | |
927 | { .tag = 0 }, | |
928 | }; | |
994a1f78 | 929 | |
8973504b | 930 | if (str == NULL) |
33c2dcfd | 931 | return -EINVAL; |
8973504b | 932 | |
27050f53 | 933 | val = parse_tag_value(str, tags); |
2fbe4abe | 934 | if (val != (unsigned long) -1) { |
27050f53 JO |
935 | /* we got file size value */ |
936 | pages = PERF_ALIGN(val, page_size) / page_size; | |
27050f53 JO |
937 | } else { |
938 | /* we got pages count value */ | |
939 | char *eptr; | |
940 | pages = strtoul(str, &eptr, 10); | |
33c2dcfd DA |
941 | if (*eptr != '\0') |
942 | return -EINVAL; | |
994a1f78 JO |
943 | } |
944 | ||
2bcab6c1 | 945 | if (pages == 0 && min == 0) { |
33c2dcfd | 946 | /* leave number of pages at 0 */ |
1dbfa938 | 947 | } else if (!is_power_of_2(pages)) { |
33c2dcfd | 948 | /* round pages up to next power of 2 */ |
1dbfa938 AH |
949 | pages = next_pow2_l(pages); |
950 | if (!pages) | |
951 | return -EINVAL; | |
9639837e DA |
952 | pr_info("rounding mmap pages size to %lu bytes (%lu pages)\n", |
953 | pages * page_size, pages); | |
2fbe4abe AH |
954 | } |
955 | ||
33c2dcfd DA |
956 | if (pages > max) |
957 | return -EINVAL; | |
958 | ||
959 | return pages; | |
960 | } | |
961 | ||
962 | int perf_evlist__parse_mmap_pages(const struct option *opt, const char *str, | |
963 | int unset __maybe_unused) | |
964 | { | |
965 | unsigned int *mmap_pages = opt->value; | |
966 | unsigned long max = UINT_MAX; | |
967 | long pages; | |
968 | ||
f5ae9c42 | 969 | if (max > SIZE_MAX / page_size) |
33c2dcfd DA |
970 | max = SIZE_MAX / page_size; |
971 | ||
972 | pages = parse_pages_arg(str, 1, max); | |
973 | if (pages < 0) { | |
974 | pr_err("Invalid argument for --mmap_pages/-m\n"); | |
994a1f78 JO |
975 | return -1; |
976 | } | |
977 | ||
978 | *mmap_pages = pages; | |
979 | return 0; | |
980 | } | |
981 | ||
c83fa7f2 AH |
982 | /** |
983 | * perf_evlist__mmap - Create mmaps to receive events. | |
984 | * @evlist: list of events | |
985 | * @pages: map length in pages | |
986 | * @overwrite: overwrite older events? | |
f8a95309 | 987 | * |
c83fa7f2 AH |
988 | * If @overwrite is %false the user needs to signal event consumption using |
989 | * perf_mmap__write_tail(). Using perf_evlist__mmap_read() does this | |
990 | * automatically. | |
7e2ed097 | 991 | * |
c83fa7f2 | 992 | * Return: %0 on success, negative error code otherwise. |
f8a95309 | 993 | */ |
50a682ce ACM |
994 | int perf_evlist__mmap(struct perf_evlist *evlist, unsigned int pages, |
995 | bool overwrite) | |
f8a95309 | 996 | { |
aece948f | 997 | struct perf_evsel *evsel; |
7e2ed097 ACM |
998 | const struct cpu_map *cpus = evlist->cpus; |
999 | const struct thread_map *threads = evlist->threads; | |
a8a8f3eb AH |
1000 | struct mmap_params mp = { |
1001 | .prot = PROT_READ | (overwrite ? 0 : PROT_WRITE), | |
1002 | }; | |
50a682ce | 1003 | |
7e2ed097 | 1004 | if (evlist->mmap == NULL && perf_evlist__alloc_mmap(evlist) < 0) |
f8a95309 ACM |
1005 | return -ENOMEM; |
1006 | ||
1b85337d | 1007 | if (evlist->pollfd.entries == NULL && perf_evlist__alloc_pollfd(evlist) < 0) |
f8a95309 ACM |
1008 | return -ENOMEM; |
1009 | ||
1010 | evlist->overwrite = overwrite; | |
994a1f78 | 1011 | evlist->mmap_len = perf_evlist__mmap_size(pages); |
2af68ef5 | 1012 | pr_debug("mmap size %zuB\n", evlist->mmap_len); |
a8a8f3eb | 1013 | mp.mask = evlist->mmap_len - page_size - 1; |
f8a95309 | 1014 | |
0050f7aa | 1015 | evlist__for_each(evlist, evsel) { |
f8a95309 | 1016 | if ((evsel->attr.read_format & PERF_FORMAT_ID) && |
a91e5431 | 1017 | evsel->sample_id == NULL && |
a14bb7a6 | 1018 | perf_evsel__alloc_id(evsel, cpu_map__nr(cpus), threads->nr) < 0) |
f8a95309 | 1019 | return -ENOMEM; |
f8a95309 ACM |
1020 | } |
1021 | ||
ec1e7e43 | 1022 | if (cpu_map__empty(cpus)) |
a8a8f3eb | 1023 | return perf_evlist__mmap_per_thread(evlist, &mp); |
f8a95309 | 1024 | |
a8a8f3eb | 1025 | return perf_evlist__mmap_per_cpu(evlist, &mp); |
f8a95309 | 1026 | } |
7e2ed097 | 1027 | |
602ad878 | 1028 | int perf_evlist__create_maps(struct perf_evlist *evlist, struct target *target) |
7e2ed097 | 1029 | { |
b809ac10 NK |
1030 | evlist->threads = thread_map__new_str(target->pid, target->tid, |
1031 | target->uid); | |
7e2ed097 ACM |
1032 | |
1033 | if (evlist->threads == NULL) | |
1034 | return -1; | |
1035 | ||
9c105fbc | 1036 | if (target__uses_dummy_map(target)) |
d1cb9fce | 1037 | evlist->cpus = cpu_map__dummy_new(); |
879d77d0 NK |
1038 | else |
1039 | evlist->cpus = cpu_map__new(target->cpu_list); | |
7e2ed097 ACM |
1040 | |
1041 | if (evlist->cpus == NULL) | |
1042 | goto out_delete_threads; | |
1043 | ||
1044 | return 0; | |
1045 | ||
1046 | out_delete_threads: | |
1047 | thread_map__delete(evlist->threads); | |
b2e19a93 | 1048 | evlist->threads = NULL; |
7e2ed097 ACM |
1049 | return -1; |
1050 | } | |
1051 | ||
1491a632 | 1052 | int perf_evlist__apply_filters(struct perf_evlist *evlist) |
0a102479 | 1053 | { |
0a102479 | 1054 | struct perf_evsel *evsel; |
745cefc5 ACM |
1055 | int err = 0; |
1056 | const int ncpus = cpu_map__nr(evlist->cpus), | |
b3a319d5 | 1057 | nthreads = thread_map__nr(evlist->threads); |
0a102479 | 1058 | |
0050f7aa | 1059 | evlist__for_each(evlist, evsel) { |
745cefc5 | 1060 | if (evsel->filter == NULL) |
0a102479 | 1061 | continue; |
745cefc5 ACM |
1062 | |
1063 | err = perf_evsel__set_filter(evsel, ncpus, nthreads, evsel->filter); | |
1064 | if (err) | |
1065 | break; | |
0a102479 FW |
1066 | } |
1067 | ||
745cefc5 ACM |
1068 | return err; |
1069 | } | |
1070 | ||
1071 | int perf_evlist__set_filter(struct perf_evlist *evlist, const char *filter) | |
1072 | { | |
1073 | struct perf_evsel *evsel; | |
1074 | int err = 0; | |
1075 | const int ncpus = cpu_map__nr(evlist->cpus), | |
b3a319d5 | 1076 | nthreads = thread_map__nr(evlist->threads); |
745cefc5 | 1077 | |
0050f7aa | 1078 | evlist__for_each(evlist, evsel) { |
745cefc5 ACM |
1079 | err = perf_evsel__set_filter(evsel, ncpus, nthreads, filter); |
1080 | if (err) | |
1081 | break; | |
1082 | } | |
1083 | ||
1084 | return err; | |
0a102479 | 1085 | } |
74429964 | 1086 | |
0c21f736 | 1087 | bool perf_evlist__valid_sample_type(struct perf_evlist *evlist) |
74429964 | 1088 | { |
75562573 | 1089 | struct perf_evsel *pos; |
c2a70653 | 1090 | |
75562573 AH |
1091 | if (evlist->nr_entries == 1) |
1092 | return true; | |
1093 | ||
1094 | if (evlist->id_pos < 0 || evlist->is_pos < 0) | |
1095 | return false; | |
1096 | ||
0050f7aa | 1097 | evlist__for_each(evlist, pos) { |
75562573 AH |
1098 | if (pos->id_pos != evlist->id_pos || |
1099 | pos->is_pos != evlist->is_pos) | |
c2a70653 | 1100 | return false; |
74429964 FW |
1101 | } |
1102 | ||
c2a70653 | 1103 | return true; |
74429964 FW |
1104 | } |
1105 | ||
75562573 | 1106 | u64 __perf_evlist__combined_sample_type(struct perf_evlist *evlist) |
c2a70653 | 1107 | { |
75562573 AH |
1108 | struct perf_evsel *evsel; |
1109 | ||
1110 | if (evlist->combined_sample_type) | |
1111 | return evlist->combined_sample_type; | |
1112 | ||
0050f7aa | 1113 | evlist__for_each(evlist, evsel) |
75562573 AH |
1114 | evlist->combined_sample_type |= evsel->attr.sample_type; |
1115 | ||
1116 | return evlist->combined_sample_type; | |
1117 | } | |
1118 | ||
1119 | u64 perf_evlist__combined_sample_type(struct perf_evlist *evlist) | |
1120 | { | |
1121 | evlist->combined_sample_type = 0; | |
1122 | return __perf_evlist__combined_sample_type(evlist); | |
c2a70653 ACM |
1123 | } |
1124 | ||
9ede473c JO |
1125 | bool perf_evlist__valid_read_format(struct perf_evlist *evlist) |
1126 | { | |
1127 | struct perf_evsel *first = perf_evlist__first(evlist), *pos = first; | |
1128 | u64 read_format = first->attr.read_format; | |
1129 | u64 sample_type = first->attr.sample_type; | |
1130 | ||
0050f7aa | 1131 | evlist__for_each(evlist, pos) { |
9ede473c JO |
1132 | if (read_format != pos->attr.read_format) |
1133 | return false; | |
1134 | } | |
1135 | ||
1136 | /* PERF_SAMPLE_READ imples PERF_FORMAT_ID. */ | |
1137 | if ((sample_type & PERF_SAMPLE_READ) && | |
1138 | !(read_format & PERF_FORMAT_ID)) { | |
1139 | return false; | |
1140 | } | |
1141 | ||
1142 | return true; | |
1143 | } | |
1144 | ||
1145 | u64 perf_evlist__read_format(struct perf_evlist *evlist) | |
1146 | { | |
1147 | struct perf_evsel *first = perf_evlist__first(evlist); | |
1148 | return first->attr.read_format; | |
1149 | } | |
1150 | ||
0c21f736 | 1151 | u16 perf_evlist__id_hdr_size(struct perf_evlist *evlist) |
81e36bff | 1152 | { |
0c21f736 | 1153 | struct perf_evsel *first = perf_evlist__first(evlist); |
81e36bff ACM |
1154 | struct perf_sample *data; |
1155 | u64 sample_type; | |
1156 | u16 size = 0; | |
1157 | ||
81e36bff ACM |
1158 | if (!first->attr.sample_id_all) |
1159 | goto out; | |
1160 | ||
1161 | sample_type = first->attr.sample_type; | |
1162 | ||
1163 | if (sample_type & PERF_SAMPLE_TID) | |
1164 | size += sizeof(data->tid) * 2; | |
1165 | ||
1166 | if (sample_type & PERF_SAMPLE_TIME) | |
1167 | size += sizeof(data->time); | |
1168 | ||
1169 | if (sample_type & PERF_SAMPLE_ID) | |
1170 | size += sizeof(data->id); | |
1171 | ||
1172 | if (sample_type & PERF_SAMPLE_STREAM_ID) | |
1173 | size += sizeof(data->stream_id); | |
1174 | ||
1175 | if (sample_type & PERF_SAMPLE_CPU) | |
1176 | size += sizeof(data->cpu) * 2; | |
75562573 AH |
1177 | |
1178 | if (sample_type & PERF_SAMPLE_IDENTIFIER) | |
1179 | size += sizeof(data->id); | |
81e36bff ACM |
1180 | out: |
1181 | return size; | |
1182 | } | |
1183 | ||
0c21f736 | 1184 | bool perf_evlist__valid_sample_id_all(struct perf_evlist *evlist) |
74429964 | 1185 | { |
0c21f736 | 1186 | struct perf_evsel *first = perf_evlist__first(evlist), *pos = first; |
c2a70653 | 1187 | |
0050f7aa | 1188 | evlist__for_each_continue(evlist, pos) { |
c2a70653 ACM |
1189 | if (first->attr.sample_id_all != pos->attr.sample_id_all) |
1190 | return false; | |
74429964 FW |
1191 | } |
1192 | ||
c2a70653 ACM |
1193 | return true; |
1194 | } | |
1195 | ||
0c21f736 | 1196 | bool perf_evlist__sample_id_all(struct perf_evlist *evlist) |
c2a70653 | 1197 | { |
0c21f736 | 1198 | struct perf_evsel *first = perf_evlist__first(evlist); |
c2a70653 | 1199 | return first->attr.sample_id_all; |
74429964 | 1200 | } |
81cce8de ACM |
1201 | |
1202 | void perf_evlist__set_selected(struct perf_evlist *evlist, | |
1203 | struct perf_evsel *evsel) | |
1204 | { | |
1205 | evlist->selected = evsel; | |
1206 | } | |
727ab04e | 1207 | |
a74b4b66 NK |
1208 | void perf_evlist__close(struct perf_evlist *evlist) |
1209 | { | |
1210 | struct perf_evsel *evsel; | |
1211 | int ncpus = cpu_map__nr(evlist->cpus); | |
1212 | int nthreads = thread_map__nr(evlist->threads); | |
8ad9219e | 1213 | int n; |
a74b4b66 | 1214 | |
8ad9219e SE |
1215 | evlist__for_each_reverse(evlist, evsel) { |
1216 | n = evsel->cpus ? evsel->cpus->nr : ncpus; | |
1217 | perf_evsel__close(evsel, n, nthreads); | |
1218 | } | |
a74b4b66 NK |
1219 | } |
1220 | ||
4112eb18 ACM |
1221 | static int perf_evlist__create_syswide_maps(struct perf_evlist *evlist) |
1222 | { | |
1223 | int err = -ENOMEM; | |
1224 | ||
1225 | /* | |
1226 | * Try reading /sys/devices/system/cpu/online to get | |
1227 | * an all cpus map. | |
1228 | * | |
1229 | * FIXME: -ENOMEM is the best we can do here, the cpu_map | |
1230 | * code needs an overhaul to properly forward the | |
1231 | * error, and we may not want to do that fallback to a | |
1232 | * default cpu identity map :-\ | |
1233 | */ | |
1234 | evlist->cpus = cpu_map__new(NULL); | |
1235 | if (evlist->cpus == NULL) | |
1236 | goto out; | |
1237 | ||
1238 | evlist->threads = thread_map__new_dummy(); | |
1239 | if (evlist->threads == NULL) | |
1240 | goto out_free_cpus; | |
1241 | ||
1242 | err = 0; | |
1243 | out: | |
1244 | return err; | |
1245 | out_free_cpus: | |
1246 | cpu_map__delete(evlist->cpus); | |
1247 | evlist->cpus = NULL; | |
1248 | goto out; | |
1249 | } | |
1250 | ||
6a4bb04c | 1251 | int perf_evlist__open(struct perf_evlist *evlist) |
727ab04e | 1252 | { |
6a4bb04c | 1253 | struct perf_evsel *evsel; |
a74b4b66 | 1254 | int err; |
727ab04e | 1255 | |
4112eb18 ACM |
1256 | /* |
1257 | * Default: one fd per CPU, all threads, aka systemwide | |
1258 | * as sys_perf_event_open(cpu = -1, thread = -1) is EINVAL | |
1259 | */ | |
1260 | if (evlist->threads == NULL && evlist->cpus == NULL) { | |
1261 | err = perf_evlist__create_syswide_maps(evlist); | |
1262 | if (err < 0) | |
1263 | goto out_err; | |
1264 | } | |
1265 | ||
733cd2fe AH |
1266 | perf_evlist__update_id_pos(evlist); |
1267 | ||
0050f7aa | 1268 | evlist__for_each(evlist, evsel) { |
6a4bb04c | 1269 | err = perf_evsel__open(evsel, evlist->cpus, evlist->threads); |
727ab04e ACM |
1270 | if (err < 0) |
1271 | goto out_err; | |
1272 | } | |
1273 | ||
1274 | return 0; | |
1275 | out_err: | |
a74b4b66 | 1276 | perf_evlist__close(evlist); |
41c21a68 | 1277 | errno = -err; |
727ab04e ACM |
1278 | return err; |
1279 | } | |
35b9d88e | 1280 | |
602ad878 | 1281 | int perf_evlist__prepare_workload(struct perf_evlist *evlist, struct target *target, |
55e162ea | 1282 | const char *argv[], bool pipe_output, |
735f7e0b | 1283 | void (*exec_error)(int signo, siginfo_t *info, void *ucontext)) |
35b9d88e ACM |
1284 | { |
1285 | int child_ready_pipe[2], go_pipe[2]; | |
1286 | char bf; | |
1287 | ||
1288 | if (pipe(child_ready_pipe) < 0) { | |
1289 | perror("failed to create 'ready' pipe"); | |
1290 | return -1; | |
1291 | } | |
1292 | ||
1293 | if (pipe(go_pipe) < 0) { | |
1294 | perror("failed to create 'go' pipe"); | |
1295 | goto out_close_ready_pipe; | |
1296 | } | |
1297 | ||
1298 | evlist->workload.pid = fork(); | |
1299 | if (evlist->workload.pid < 0) { | |
1300 | perror("failed to fork"); | |
1301 | goto out_close_pipes; | |
1302 | } | |
1303 | ||
1304 | if (!evlist->workload.pid) { | |
5f1c4225 ACM |
1305 | int ret; |
1306 | ||
119fa3c9 | 1307 | if (pipe_output) |
35b9d88e ACM |
1308 | dup2(2, 1); |
1309 | ||
0817df08 DA |
1310 | signal(SIGTERM, SIG_DFL); |
1311 | ||
35b9d88e ACM |
1312 | close(child_ready_pipe[0]); |
1313 | close(go_pipe[1]); | |
1314 | fcntl(go_pipe[0], F_SETFD, FD_CLOEXEC); | |
1315 | ||
35b9d88e ACM |
1316 | /* |
1317 | * Tell the parent we're ready to go | |
1318 | */ | |
1319 | close(child_ready_pipe[1]); | |
1320 | ||
1321 | /* | |
1322 | * Wait until the parent tells us to go. | |
1323 | */ | |
5f1c4225 ACM |
1324 | ret = read(go_pipe[0], &bf, 1); |
1325 | /* | |
1326 | * The parent will ask for the execvp() to be performed by | |
1327 | * writing exactly one byte, in workload.cork_fd, usually via | |
1328 | * perf_evlist__start_workload(). | |
1329 | * | |
1330 | * For cancelling the workload without actuallin running it, | |
1331 | * the parent will just close workload.cork_fd, without writing | |
1332 | * anything, i.e. read will return zero and we just exit() | |
1333 | * here. | |
1334 | */ | |
1335 | if (ret != 1) { | |
1336 | if (ret == -1) | |
1337 | perror("unable to read pipe"); | |
1338 | exit(ret); | |
1339 | } | |
35b9d88e ACM |
1340 | |
1341 | execvp(argv[0], (char **)argv); | |
1342 | ||
735f7e0b | 1343 | if (exec_error) { |
f33cbe72 ACM |
1344 | union sigval val; |
1345 | ||
1346 | val.sival_int = errno; | |
1347 | if (sigqueue(getppid(), SIGUSR1, val)) | |
1348 | perror(argv[0]); | |
1349 | } else | |
1350 | perror(argv[0]); | |
35b9d88e ACM |
1351 | exit(-1); |
1352 | } | |
1353 | ||
735f7e0b ACM |
1354 | if (exec_error) { |
1355 | struct sigaction act = { | |
1356 | .sa_flags = SA_SIGINFO, | |
1357 | .sa_sigaction = exec_error, | |
1358 | }; | |
1359 | sigaction(SIGUSR1, &act, NULL); | |
1360 | } | |
1361 | ||
1aaf63b1 ACM |
1362 | if (target__none(target)) { |
1363 | if (evlist->threads == NULL) { | |
1364 | fprintf(stderr, "FATAL: evlist->threads need to be set at this point (%s:%d).\n", | |
1365 | __func__, __LINE__); | |
1366 | goto out_close_pipes; | |
1367 | } | |
35b9d88e | 1368 | evlist->threads->map[0] = evlist->workload.pid; |
1aaf63b1 | 1369 | } |
35b9d88e ACM |
1370 | |
1371 | close(child_ready_pipe[1]); | |
1372 | close(go_pipe[0]); | |
1373 | /* | |
1374 | * wait for child to settle | |
1375 | */ | |
1376 | if (read(child_ready_pipe[0], &bf, 1) == -1) { | |
1377 | perror("unable to read pipe"); | |
1378 | goto out_close_pipes; | |
1379 | } | |
1380 | ||
bcf3145f | 1381 | fcntl(go_pipe[1], F_SETFD, FD_CLOEXEC); |
35b9d88e ACM |
1382 | evlist->workload.cork_fd = go_pipe[1]; |
1383 | close(child_ready_pipe[0]); | |
1384 | return 0; | |
1385 | ||
1386 | out_close_pipes: | |
1387 | close(go_pipe[0]); | |
1388 | close(go_pipe[1]); | |
1389 | out_close_ready_pipe: | |
1390 | close(child_ready_pipe[0]); | |
1391 | close(child_ready_pipe[1]); | |
1392 | return -1; | |
1393 | } | |
1394 | ||
1395 | int perf_evlist__start_workload(struct perf_evlist *evlist) | |
1396 | { | |
1397 | if (evlist->workload.cork_fd > 0) { | |
b3824404 | 1398 | char bf = 0; |
bcf3145f | 1399 | int ret; |
35b9d88e ACM |
1400 | /* |
1401 | * Remove the cork, let it rip! | |
1402 | */ | |
bcf3145f NK |
1403 | ret = write(evlist->workload.cork_fd, &bf, 1); |
1404 | if (ret < 0) | |
1405 | perror("enable to write to pipe"); | |
1406 | ||
1407 | close(evlist->workload.cork_fd); | |
1408 | return ret; | |
35b9d88e ACM |
1409 | } |
1410 | ||
1411 | return 0; | |
1412 | } | |
cb0b29e0 | 1413 | |
a3f698fe | 1414 | int perf_evlist__parse_sample(struct perf_evlist *evlist, union perf_event *event, |
0807d2d8 | 1415 | struct perf_sample *sample) |
cb0b29e0 | 1416 | { |
75562573 AH |
1417 | struct perf_evsel *evsel = perf_evlist__event2evsel(evlist, event); |
1418 | ||
1419 | if (!evsel) | |
1420 | return -EFAULT; | |
0807d2d8 | 1421 | return perf_evsel__parse_sample(evsel, event, sample); |
cb0b29e0 | 1422 | } |
78f067b3 ACM |
1423 | |
1424 | size_t perf_evlist__fprintf(struct perf_evlist *evlist, FILE *fp) | |
1425 | { | |
1426 | struct perf_evsel *evsel; | |
1427 | size_t printed = 0; | |
1428 | ||
0050f7aa | 1429 | evlist__for_each(evlist, evsel) { |
78f067b3 ACM |
1430 | printed += fprintf(fp, "%s%s", evsel->idx ? ", " : "", |
1431 | perf_evsel__name(evsel)); | |
1432 | } | |
1433 | ||
b2222139 | 1434 | return printed + fprintf(fp, "\n"); |
78f067b3 | 1435 | } |
6ef068cb ACM |
1436 | |
1437 | int perf_evlist__strerror_tp(struct perf_evlist *evlist __maybe_unused, | |
1438 | int err, char *buf, size_t size) | |
1439 | { | |
1440 | char sbuf[128]; | |
1441 | ||
1442 | switch (err) { | |
1443 | case ENOENT: | |
1444 | scnprintf(buf, size, "%s", | |
1445 | "Error:\tUnable to find debugfs\n" | |
1446 | "Hint:\tWas your kernel was compiled with debugfs support?\n" | |
1447 | "Hint:\tIs the debugfs filesystem mounted?\n" | |
1448 | "Hint:\tTry 'sudo mount -t debugfs nodev /sys/kernel/debug'"); | |
1449 | break; | |
1450 | case EACCES: | |
1451 | scnprintf(buf, size, | |
1452 | "Error:\tNo permissions to read %s/tracing/events/raw_syscalls\n" | |
1453 | "Hint:\tTry 'sudo mount -o remount,mode=755 %s'\n", | |
1454 | debugfs_mountpoint, debugfs_mountpoint); | |
1455 | break; | |
1456 | default: | |
1457 | scnprintf(buf, size, "%s", strerror_r(err, sbuf, sizeof(sbuf))); | |
1458 | break; | |
1459 | } | |
1460 | ||
1461 | return 0; | |
1462 | } | |
a8f23d8f ACM |
1463 | |
1464 | int perf_evlist__strerror_open(struct perf_evlist *evlist __maybe_unused, | |
1465 | int err, char *buf, size_t size) | |
1466 | { | |
1467 | int printed, value; | |
6e81c74c | 1468 | char sbuf[STRERR_BUFSIZE], *emsg = strerror_r(err, sbuf, sizeof(sbuf)); |
a8f23d8f ACM |
1469 | |
1470 | switch (err) { | |
1471 | case EACCES: | |
1472 | case EPERM: | |
1473 | printed = scnprintf(buf, size, | |
1474 | "Error:\t%s.\n" | |
1475 | "Hint:\tCheck /proc/sys/kernel/perf_event_paranoid setting.", emsg); | |
1476 | ||
1a47245d | 1477 | value = perf_event_paranoid(); |
a8f23d8f ACM |
1478 | |
1479 | printed += scnprintf(buf + printed, size - printed, "\nHint:\t"); | |
1480 | ||
1481 | if (value >= 2) { | |
1482 | printed += scnprintf(buf + printed, size - printed, | |
1483 | "For your workloads it needs to be <= 1\nHint:\t"); | |
1484 | } | |
1485 | printed += scnprintf(buf + printed, size - printed, | |
5229e366 | 1486 | "For system wide tracing it needs to be set to -1.\n"); |
a8f23d8f ACM |
1487 | |
1488 | printed += scnprintf(buf + printed, size - printed, | |
5229e366 ACM |
1489 | "Hint:\tTry: 'sudo sh -c \"echo -1 > /proc/sys/kernel/perf_event_paranoid\"'\n" |
1490 | "Hint:\tThe current value is %d.", value); | |
a8f23d8f ACM |
1491 | break; |
1492 | default: | |
1493 | scnprintf(buf, size, "%s", emsg); | |
1494 | break; | |
1495 | } | |
1496 | ||
1497 | return 0; | |
1498 | } | |
a025e4f0 | 1499 | |
956fa571 ACM |
1500 | int perf_evlist__strerror_mmap(struct perf_evlist *evlist, int err, char *buf, size_t size) |
1501 | { | |
1502 | char sbuf[STRERR_BUFSIZE], *emsg = strerror_r(err, sbuf, sizeof(sbuf)); | |
e965bea1 | 1503 | int pages_attempted = evlist->mmap_len / 1024, pages_max_per_user, printed = 0; |
956fa571 ACM |
1504 | |
1505 | switch (err) { | |
1506 | case EPERM: | |
e5d4a290 | 1507 | sysctl__read_int("kernel/perf_event_mlock_kb", &pages_max_per_user); |
e965bea1 ACM |
1508 | printed += scnprintf(buf + printed, size - printed, |
1509 | "Error:\t%s.\n" | |
956fa571 | 1510 | "Hint:\tCheck /proc/sys/kernel/perf_event_mlock_kb (%d kB) setting.\n" |
e965bea1 | 1511 | "Hint:\tTried using %zd kB.\n", |
e5d4a290 | 1512 | emsg, pages_max_per_user, pages_attempted); |
e965bea1 ACM |
1513 | |
1514 | if (pages_attempted >= pages_max_per_user) { | |
1515 | printed += scnprintf(buf + printed, size - printed, | |
1516 | "Hint:\tTry 'sudo sh -c \"echo %d > /proc/sys/kernel/perf_event_mlock_kb\"', or\n", | |
1517 | pages_max_per_user + pages_attempted); | |
1518 | } | |
1519 | ||
1520 | printed += scnprintf(buf + printed, size - printed, | |
1521 | "Hint:\tTry using a smaller -m/--mmap-pages value."); | |
956fa571 ACM |
1522 | break; |
1523 | default: | |
1524 | scnprintf(buf, size, "%s", emsg); | |
1525 | break; | |
1526 | } | |
1527 | ||
1528 | return 0; | |
1529 | } | |
1530 | ||
a025e4f0 AH |
1531 | void perf_evlist__to_front(struct perf_evlist *evlist, |
1532 | struct perf_evsel *move_evsel) | |
1533 | { | |
1534 | struct perf_evsel *evsel, *n; | |
1535 | LIST_HEAD(move); | |
1536 | ||
1537 | if (move_evsel == perf_evlist__first(evlist)) | |
1538 | return; | |
1539 | ||
0050f7aa | 1540 | evlist__for_each_safe(evlist, n, evsel) { |
a025e4f0 AH |
1541 | if (evsel->leader == move_evsel->leader) |
1542 | list_move_tail(&evsel->node, &move); | |
1543 | } | |
1544 | ||
1545 | list_splice(&move, &evlist->entries); | |
1546 | } | |
60b0896c AH |
1547 | |
1548 | void perf_evlist__set_tracking_event(struct perf_evlist *evlist, | |
1549 | struct perf_evsel *tracking_evsel) | |
1550 | { | |
1551 | struct perf_evsel *evsel; | |
1552 | ||
1553 | if (tracking_evsel->tracking) | |
1554 | return; | |
1555 | ||
1556 | evlist__for_each(evlist, evsel) { | |
1557 | if (evsel != tracking_evsel) | |
1558 | evsel->tracking = false; | |
1559 | } | |
1560 | ||
1561 | tracking_evsel->tracking = true; | |
1562 | } |