Commit | Line | Data |
---|---|---|
f8a95309 ACM |
1 | /* |
2 | * Copyright (C) 2011, Red Hat Inc, Arnaldo Carvalho de Melo <acme@redhat.com> | |
3 | * | |
4 | * Parts came from builtin-{top,stat,record}.c, see those files for further | |
5 | * copyright notes. | |
6 | * | |
7 | * Released under the GPL v2. (and only v2, not any later version) | |
8 | */ | |
a8c9ae18 | 9 | #include "util.h" |
956fa571 | 10 | #include <api/fs/fs.h> |
5c581041 | 11 | #include <poll.h> |
f8a95309 ACM |
12 | #include "cpumap.h" |
13 | #include "thread_map.h" | |
12864b31 | 14 | #include "target.h" |
361c99a6 ACM |
15 | #include "evlist.h" |
16 | #include "evsel.h" | |
e3e1a54f | 17 | #include "debug.h" |
35b9d88e | 18 | #include <unistd.h> |
361c99a6 | 19 | |
50d08e47 | 20 | #include "parse-events.h" |
994a1f78 | 21 | #include "parse-options.h" |
50d08e47 | 22 | |
f8a95309 ACM |
23 | #include <sys/mman.h> |
24 | ||
70db7533 ACM |
25 | #include <linux/bitops.h> |
26 | #include <linux/hash.h> | |
0389cd1f | 27 | #include <linux/log2.h> |
70db7533 | 28 | |
e4b356b5 ACM |
29 | static void perf_evlist__mmap_put(struct perf_evlist *evlist, int idx); |
30 | static void __perf_evlist__munmap(struct perf_evlist *evlist, int idx); | |
31 | ||
f8a95309 | 32 | #define FD(e, x, y) (*(int *)xyarray__entry(e->fd, x, y)) |
a91e5431 | 33 | #define SID(e, x, y) xyarray__entry(e->sample_id, x, y) |
f8a95309 | 34 | |
7e2ed097 ACM |
35 | void perf_evlist__init(struct perf_evlist *evlist, struct cpu_map *cpus, |
36 | struct thread_map *threads) | |
ef1d1af2 ACM |
37 | { |
38 | int i; | |
39 | ||
40 | for (i = 0; i < PERF_EVLIST__HLIST_SIZE; ++i) | |
41 | INIT_HLIST_HEAD(&evlist->heads[i]); | |
42 | INIT_LIST_HEAD(&evlist->entries); | |
7e2ed097 | 43 | perf_evlist__set_maps(evlist, cpus, threads); |
1b85337d | 44 | fdarray__init(&evlist->pollfd, 64); |
35b9d88e | 45 | evlist->workload.pid = -1; |
ef1d1af2 ACM |
46 | } |
47 | ||
334fe7a3 | 48 | struct perf_evlist *perf_evlist__new(void) |
361c99a6 ACM |
49 | { |
50 | struct perf_evlist *evlist = zalloc(sizeof(*evlist)); | |
51 | ||
ef1d1af2 | 52 | if (evlist != NULL) |
334fe7a3 | 53 | perf_evlist__init(evlist, NULL, NULL); |
361c99a6 ACM |
54 | |
55 | return evlist; | |
56 | } | |
57 | ||
b22d54b0 JO |
58 | struct perf_evlist *perf_evlist__new_default(void) |
59 | { | |
60 | struct perf_evlist *evlist = perf_evlist__new(); | |
61 | ||
62 | if (evlist && perf_evlist__add_default(evlist)) { | |
63 | perf_evlist__delete(evlist); | |
64 | evlist = NULL; | |
65 | } | |
66 | ||
67 | return evlist; | |
68 | } | |
69 | ||
75562573 AH |
70 | /** |
71 | * perf_evlist__set_id_pos - set the positions of event ids. | |
72 | * @evlist: selected event list | |
73 | * | |
74 | * Events with compatible sample types all have the same id_pos | |
75 | * and is_pos. For convenience, put a copy on evlist. | |
76 | */ | |
77 | void perf_evlist__set_id_pos(struct perf_evlist *evlist) | |
78 | { | |
79 | struct perf_evsel *first = perf_evlist__first(evlist); | |
80 | ||
81 | evlist->id_pos = first->id_pos; | |
82 | evlist->is_pos = first->is_pos; | |
83 | } | |
84 | ||
733cd2fe AH |
85 | static void perf_evlist__update_id_pos(struct perf_evlist *evlist) |
86 | { | |
87 | struct perf_evsel *evsel; | |
88 | ||
0050f7aa | 89 | evlist__for_each(evlist, evsel) |
733cd2fe AH |
90 | perf_evsel__calc_id_pos(evsel); |
91 | ||
92 | perf_evlist__set_id_pos(evlist); | |
93 | } | |
94 | ||
361c99a6 ACM |
95 | static void perf_evlist__purge(struct perf_evlist *evlist) |
96 | { | |
97 | struct perf_evsel *pos, *n; | |
98 | ||
0050f7aa | 99 | evlist__for_each_safe(evlist, n, pos) { |
361c99a6 | 100 | list_del_init(&pos->node); |
d49e4695 | 101 | pos->evlist = NULL; |
361c99a6 ACM |
102 | perf_evsel__delete(pos); |
103 | } | |
104 | ||
105 | evlist->nr_entries = 0; | |
106 | } | |
107 | ||
ef1d1af2 | 108 | void perf_evlist__exit(struct perf_evlist *evlist) |
361c99a6 | 109 | { |
04662523 | 110 | zfree(&evlist->mmap); |
1b85337d | 111 | fdarray__exit(&evlist->pollfd); |
ef1d1af2 ACM |
112 | } |
113 | ||
114 | void perf_evlist__delete(struct perf_evlist *evlist) | |
115 | { | |
983874d1 | 116 | perf_evlist__munmap(evlist); |
f26e1c7c | 117 | perf_evlist__close(evlist); |
f30a79b0 | 118 | cpu_map__put(evlist->cpus); |
186fbb74 | 119 | thread_map__put(evlist->threads); |
03ad9747 ACM |
120 | evlist->cpus = NULL; |
121 | evlist->threads = NULL; | |
ef1d1af2 ACM |
122 | perf_evlist__purge(evlist); |
123 | perf_evlist__exit(evlist); | |
361c99a6 ACM |
124 | free(evlist); |
125 | } | |
126 | ||
adc0c3e8 AH |
127 | static void __perf_evlist__propagate_maps(struct perf_evlist *evlist, |
128 | struct perf_evsel *evsel) | |
129 | { | |
130 | /* | |
131 | * We already have cpus for evsel (via PMU sysfs) so | |
132 | * keep it, if there's no target cpu list defined. | |
133 | */ | |
134 | if (!evsel->own_cpus || evlist->has_user_cpus) { | |
135 | cpu_map__put(evsel->cpus); | |
136 | evsel->cpus = cpu_map__get(evlist->cpus); | |
137 | } else if (evsel->cpus != evsel->own_cpus) { | |
138 | cpu_map__put(evsel->cpus); | |
139 | evsel->cpus = cpu_map__get(evsel->own_cpus); | |
140 | } | |
141 | ||
142 | thread_map__put(evsel->threads); | |
143 | evsel->threads = thread_map__get(evlist->threads); | |
144 | } | |
145 | ||
146 | static void perf_evlist__propagate_maps(struct perf_evlist *evlist) | |
147 | { | |
148 | struct perf_evsel *evsel; | |
149 | ||
150 | evlist__for_each(evlist, evsel) | |
151 | __perf_evlist__propagate_maps(evlist, evsel); | |
152 | } | |
153 | ||
361c99a6 ACM |
154 | void perf_evlist__add(struct perf_evlist *evlist, struct perf_evsel *entry) |
155 | { | |
d49e4695 | 156 | entry->evlist = evlist; |
361c99a6 | 157 | list_add_tail(&entry->node, &evlist->entries); |
ef503831 | 158 | entry->idx = evlist->nr_entries; |
60b0896c | 159 | entry->tracking = !entry->idx; |
ef503831 | 160 | |
75562573 AH |
161 | if (!evlist->nr_entries++) |
162 | perf_evlist__set_id_pos(evlist); | |
361c99a6 ACM |
163 | } |
164 | ||
0529bc1f | 165 | void perf_evlist__splice_list_tail(struct perf_evlist *evlist, |
f114d6ef | 166 | struct list_head *list) |
50d08e47 | 167 | { |
f114d6ef | 168 | struct perf_evsel *evsel, *temp; |
75562573 | 169 | |
f114d6ef AH |
170 | __evlist__for_each_safe(list, temp, evsel) { |
171 | list_del_init(&evsel->node); | |
172 | perf_evlist__add(evlist, evsel); | |
173 | } | |
50d08e47 ACM |
174 | } |
175 | ||
63dab225 ACM |
176 | void __perf_evlist__set_leader(struct list_head *list) |
177 | { | |
178 | struct perf_evsel *evsel, *leader; | |
179 | ||
180 | leader = list_entry(list->next, struct perf_evsel, node); | |
97f63e4a NK |
181 | evsel = list_entry(list->prev, struct perf_evsel, node); |
182 | ||
183 | leader->nr_members = evsel->idx - leader->idx + 1; | |
63dab225 | 184 | |
0050f7aa | 185 | __evlist__for_each(list, evsel) { |
74b2133d | 186 | evsel->leader = leader; |
63dab225 ACM |
187 | } |
188 | } | |
189 | ||
190 | void perf_evlist__set_leader(struct perf_evlist *evlist) | |
6a4bb04c | 191 | { |
97f63e4a NK |
192 | if (evlist->nr_entries) { |
193 | evlist->nr_groups = evlist->nr_entries > 1 ? 1 : 0; | |
63dab225 | 194 | __perf_evlist__set_leader(&evlist->entries); |
97f63e4a | 195 | } |
6a4bb04c JO |
196 | } |
197 | ||
361c99a6 ACM |
198 | int perf_evlist__add_default(struct perf_evlist *evlist) |
199 | { | |
200 | struct perf_event_attr attr = { | |
201 | .type = PERF_TYPE_HARDWARE, | |
202 | .config = PERF_COUNT_HW_CPU_CYCLES, | |
203 | }; | |
1aed2671 JR |
204 | struct perf_evsel *evsel; |
205 | ||
206 | event_attr_init(&attr); | |
361c99a6 | 207 | |
ef503831 | 208 | evsel = perf_evsel__new(&attr); |
361c99a6 | 209 | if (evsel == NULL) |
cc2d86b0 SE |
210 | goto error; |
211 | ||
212 | /* use strdup() because free(evsel) assumes name is allocated */ | |
213 | evsel->name = strdup("cycles"); | |
214 | if (!evsel->name) | |
215 | goto error_free; | |
361c99a6 ACM |
216 | |
217 | perf_evlist__add(evlist, evsel); | |
218 | return 0; | |
cc2d86b0 SE |
219 | error_free: |
220 | perf_evsel__delete(evsel); | |
221 | error: | |
222 | return -ENOMEM; | |
361c99a6 | 223 | } |
5c581041 | 224 | |
e60fc847 ACM |
225 | static int perf_evlist__add_attrs(struct perf_evlist *evlist, |
226 | struct perf_event_attr *attrs, size_t nr_attrs) | |
50d08e47 ACM |
227 | { |
228 | struct perf_evsel *evsel, *n; | |
229 | LIST_HEAD(head); | |
230 | size_t i; | |
231 | ||
232 | for (i = 0; i < nr_attrs; i++) { | |
ef503831 | 233 | evsel = perf_evsel__new_idx(attrs + i, evlist->nr_entries + i); |
50d08e47 ACM |
234 | if (evsel == NULL) |
235 | goto out_delete_partial_list; | |
236 | list_add_tail(&evsel->node, &head); | |
237 | } | |
238 | ||
f114d6ef | 239 | perf_evlist__splice_list_tail(evlist, &head); |
50d08e47 ACM |
240 | |
241 | return 0; | |
242 | ||
243 | out_delete_partial_list: | |
0050f7aa | 244 | __evlist__for_each_safe(&head, n, evsel) |
50d08e47 ACM |
245 | perf_evsel__delete(evsel); |
246 | return -1; | |
247 | } | |
248 | ||
79695e1b ACM |
249 | int __perf_evlist__add_default_attrs(struct perf_evlist *evlist, |
250 | struct perf_event_attr *attrs, size_t nr_attrs) | |
251 | { | |
252 | size_t i; | |
253 | ||
254 | for (i = 0; i < nr_attrs; i++) | |
255 | event_attr_init(attrs + i); | |
256 | ||
257 | return perf_evlist__add_attrs(evlist, attrs, nr_attrs); | |
258 | } | |
259 | ||
da378962 ACM |
260 | struct perf_evsel * |
261 | perf_evlist__find_tracepoint_by_id(struct perf_evlist *evlist, int id) | |
ee29be62 ACM |
262 | { |
263 | struct perf_evsel *evsel; | |
264 | ||
0050f7aa | 265 | evlist__for_each(evlist, evsel) { |
ee29be62 ACM |
266 | if (evsel->attr.type == PERF_TYPE_TRACEPOINT && |
267 | (int)evsel->attr.config == id) | |
268 | return evsel; | |
269 | } | |
270 | ||
271 | return NULL; | |
272 | } | |
273 | ||
a2f2804a DA |
274 | struct perf_evsel * |
275 | perf_evlist__find_tracepoint_by_name(struct perf_evlist *evlist, | |
276 | const char *name) | |
277 | { | |
278 | struct perf_evsel *evsel; | |
279 | ||
0050f7aa | 280 | evlist__for_each(evlist, evsel) { |
a2f2804a DA |
281 | if ((evsel->attr.type == PERF_TYPE_TRACEPOINT) && |
282 | (strcmp(evsel->name, name) == 0)) | |
283 | return evsel; | |
284 | } | |
285 | ||
286 | return NULL; | |
287 | } | |
288 | ||
39876e7d ACM |
289 | int perf_evlist__add_newtp(struct perf_evlist *evlist, |
290 | const char *sys, const char *name, void *handler) | |
291 | { | |
ef503831 | 292 | struct perf_evsel *evsel = perf_evsel__newtp(sys, name); |
39876e7d | 293 | |
39876e7d ACM |
294 | if (evsel == NULL) |
295 | return -1; | |
296 | ||
744a9719 | 297 | evsel->handler = handler; |
39876e7d ACM |
298 | perf_evlist__add(evlist, evsel); |
299 | return 0; | |
300 | } | |
301 | ||
bf8e8f4b AH |
302 | static int perf_evlist__nr_threads(struct perf_evlist *evlist, |
303 | struct perf_evsel *evsel) | |
304 | { | |
305 | if (evsel->system_wide) | |
306 | return 1; | |
307 | else | |
308 | return thread_map__nr(evlist->threads); | |
309 | } | |
310 | ||
4152ab37 ACM |
311 | void perf_evlist__disable(struct perf_evlist *evlist) |
312 | { | |
313 | int cpu, thread; | |
314 | struct perf_evsel *pos; | |
b3a319d5 | 315 | int nr_cpus = cpu_map__nr(evlist->cpus); |
bf8e8f4b | 316 | int nr_threads; |
4152ab37 | 317 | |
b3a319d5 | 318 | for (cpu = 0; cpu < nr_cpus; cpu++) { |
0050f7aa | 319 | evlist__for_each(evlist, pos) { |
395c3070 | 320 | if (!perf_evsel__is_group_leader(pos) || !pos->fd) |
3fe4430d | 321 | continue; |
bf8e8f4b | 322 | nr_threads = perf_evlist__nr_threads(evlist, pos); |
b3a319d5 | 323 | for (thread = 0; thread < nr_threads; thread++) |
55da8005 NK |
324 | ioctl(FD(pos, cpu, thread), |
325 | PERF_EVENT_IOC_DISABLE, 0); | |
4152ab37 ACM |
326 | } |
327 | } | |
2b56bcfb ACM |
328 | |
329 | evlist->enabled = false; | |
4152ab37 ACM |
330 | } |
331 | ||
764e16a3 DA |
332 | void perf_evlist__enable(struct perf_evlist *evlist) |
333 | { | |
334 | int cpu, thread; | |
335 | struct perf_evsel *pos; | |
b3a319d5 | 336 | int nr_cpus = cpu_map__nr(evlist->cpus); |
bf8e8f4b | 337 | int nr_threads; |
764e16a3 | 338 | |
b3a319d5 | 339 | for (cpu = 0; cpu < nr_cpus; cpu++) { |
0050f7aa | 340 | evlist__for_each(evlist, pos) { |
395c3070 | 341 | if (!perf_evsel__is_group_leader(pos) || !pos->fd) |
3fe4430d | 342 | continue; |
bf8e8f4b | 343 | nr_threads = perf_evlist__nr_threads(evlist, pos); |
b3a319d5 | 344 | for (thread = 0; thread < nr_threads; thread++) |
55da8005 NK |
345 | ioctl(FD(pos, cpu, thread), |
346 | PERF_EVENT_IOC_ENABLE, 0); | |
764e16a3 DA |
347 | } |
348 | } | |
2b56bcfb ACM |
349 | |
350 | evlist->enabled = true; | |
351 | } | |
352 | ||
353 | void perf_evlist__toggle_enable(struct perf_evlist *evlist) | |
354 | { | |
355 | (evlist->enabled ? perf_evlist__disable : perf_evlist__enable)(evlist); | |
764e16a3 DA |
356 | } |
357 | ||
395c3070 AH |
358 | int perf_evlist__disable_event(struct perf_evlist *evlist, |
359 | struct perf_evsel *evsel) | |
360 | { | |
361 | int cpu, thread, err; | |
bf8e8f4b AH |
362 | int nr_cpus = cpu_map__nr(evlist->cpus); |
363 | int nr_threads = perf_evlist__nr_threads(evlist, evsel); | |
395c3070 AH |
364 | |
365 | if (!evsel->fd) | |
366 | return 0; | |
367 | ||
bf8e8f4b AH |
368 | for (cpu = 0; cpu < nr_cpus; cpu++) { |
369 | for (thread = 0; thread < nr_threads; thread++) { | |
395c3070 AH |
370 | err = ioctl(FD(evsel, cpu, thread), |
371 | PERF_EVENT_IOC_DISABLE, 0); | |
372 | if (err) | |
373 | return err; | |
374 | } | |
375 | } | |
376 | return 0; | |
377 | } | |
378 | ||
379 | int perf_evlist__enable_event(struct perf_evlist *evlist, | |
380 | struct perf_evsel *evsel) | |
381 | { | |
382 | int cpu, thread, err; | |
bf8e8f4b AH |
383 | int nr_cpus = cpu_map__nr(evlist->cpus); |
384 | int nr_threads = perf_evlist__nr_threads(evlist, evsel); | |
395c3070 AH |
385 | |
386 | if (!evsel->fd) | |
387 | return -EINVAL; | |
388 | ||
bf8e8f4b AH |
389 | for (cpu = 0; cpu < nr_cpus; cpu++) { |
390 | for (thread = 0; thread < nr_threads; thread++) { | |
395c3070 AH |
391 | err = ioctl(FD(evsel, cpu, thread), |
392 | PERF_EVENT_IOC_ENABLE, 0); | |
393 | if (err) | |
394 | return err; | |
395 | } | |
396 | } | |
397 | return 0; | |
398 | } | |
399 | ||
1c65056c AH |
400 | static int perf_evlist__enable_event_cpu(struct perf_evlist *evlist, |
401 | struct perf_evsel *evsel, int cpu) | |
402 | { | |
403 | int thread, err; | |
404 | int nr_threads = perf_evlist__nr_threads(evlist, evsel); | |
405 | ||
406 | if (!evsel->fd) | |
407 | return -EINVAL; | |
408 | ||
409 | for (thread = 0; thread < nr_threads; thread++) { | |
410 | err = ioctl(FD(evsel, cpu, thread), | |
411 | PERF_EVENT_IOC_ENABLE, 0); | |
412 | if (err) | |
413 | return err; | |
414 | } | |
415 | return 0; | |
416 | } | |
417 | ||
418 | static int perf_evlist__enable_event_thread(struct perf_evlist *evlist, | |
419 | struct perf_evsel *evsel, | |
420 | int thread) | |
421 | { | |
422 | int cpu, err; | |
423 | int nr_cpus = cpu_map__nr(evlist->cpus); | |
424 | ||
425 | if (!evsel->fd) | |
426 | return -EINVAL; | |
427 | ||
428 | for (cpu = 0; cpu < nr_cpus; cpu++) { | |
429 | err = ioctl(FD(evsel, cpu, thread), PERF_EVENT_IOC_ENABLE, 0); | |
430 | if (err) | |
431 | return err; | |
432 | } | |
433 | return 0; | |
434 | } | |
435 | ||
436 | int perf_evlist__enable_event_idx(struct perf_evlist *evlist, | |
437 | struct perf_evsel *evsel, int idx) | |
438 | { | |
439 | bool per_cpu_mmaps = !cpu_map__empty(evlist->cpus); | |
440 | ||
441 | if (per_cpu_mmaps) | |
442 | return perf_evlist__enable_event_cpu(evlist, evsel, idx); | |
443 | else | |
444 | return perf_evlist__enable_event_thread(evlist, evsel, idx); | |
445 | } | |
446 | ||
ad6765dd | 447 | int perf_evlist__alloc_pollfd(struct perf_evlist *evlist) |
5c581041 | 448 | { |
b3a319d5 NK |
449 | int nr_cpus = cpu_map__nr(evlist->cpus); |
450 | int nr_threads = thread_map__nr(evlist->threads); | |
bf8e8f4b AH |
451 | int nfds = 0; |
452 | struct perf_evsel *evsel; | |
453 | ||
cba9b847 | 454 | evlist__for_each(evlist, evsel) { |
bf8e8f4b AH |
455 | if (evsel->system_wide) |
456 | nfds += nr_cpus; | |
457 | else | |
458 | nfds += nr_cpus * nr_threads; | |
459 | } | |
460 | ||
1b85337d ACM |
461 | if (fdarray__available_entries(&evlist->pollfd) < nfds && |
462 | fdarray__grow(&evlist->pollfd, nfds) < 0) | |
ad6765dd ACM |
463 | return -ENOMEM; |
464 | ||
465 | return 0; | |
5c581041 | 466 | } |
70082dd9 | 467 | |
e4b356b5 ACM |
468 | static int __perf_evlist__add_pollfd(struct perf_evlist *evlist, int fd, int idx) |
469 | { | |
470 | int pos = fdarray__add(&evlist->pollfd, fd, POLLIN | POLLERR | POLLHUP); | |
471 | /* | |
472 | * Save the idx so that when we filter out fds POLLHUP'ed we can | |
473 | * close the associated evlist->mmap[] entry. | |
474 | */ | |
475 | if (pos >= 0) { | |
476 | evlist->pollfd.priv[pos].idx = idx; | |
477 | ||
478 | fcntl(fd, F_SETFL, O_NONBLOCK); | |
479 | } | |
480 | ||
481 | return pos; | |
482 | } | |
483 | ||
ad6765dd | 484 | int perf_evlist__add_pollfd(struct perf_evlist *evlist, int fd) |
70082dd9 | 485 | { |
e4b356b5 ACM |
486 | return __perf_evlist__add_pollfd(evlist, fd, -1); |
487 | } | |
488 | ||
489 | static void perf_evlist__munmap_filtered(struct fdarray *fda, int fd) | |
490 | { | |
491 | struct perf_evlist *evlist = container_of(fda, struct perf_evlist, pollfd); | |
1b85337d | 492 | |
e4b356b5 | 493 | perf_evlist__mmap_put(evlist, fda->priv[fd].idx); |
70082dd9 | 494 | } |
70db7533 | 495 | |
1ddec7f0 ACM |
496 | int perf_evlist__filter_pollfd(struct perf_evlist *evlist, short revents_and_mask) |
497 | { | |
e4b356b5 ACM |
498 | return fdarray__filter(&evlist->pollfd, revents_and_mask, |
499 | perf_evlist__munmap_filtered); | |
1ddec7f0 ACM |
500 | } |
501 | ||
f66a889d ACM |
502 | int perf_evlist__poll(struct perf_evlist *evlist, int timeout) |
503 | { | |
1b85337d | 504 | return fdarray__poll(&evlist->pollfd, timeout); |
f66a889d ACM |
505 | } |
506 | ||
a91e5431 ACM |
507 | static void perf_evlist__id_hash(struct perf_evlist *evlist, |
508 | struct perf_evsel *evsel, | |
509 | int cpu, int thread, u64 id) | |
3d3b5e95 ACM |
510 | { |
511 | int hash; | |
512 | struct perf_sample_id *sid = SID(evsel, cpu, thread); | |
513 | ||
514 | sid->id = id; | |
515 | sid->evsel = evsel; | |
516 | hash = hash_64(sid->id, PERF_EVLIST__HLIST_BITS); | |
517 | hlist_add_head(&sid->node, &evlist->heads[hash]); | |
518 | } | |
519 | ||
a91e5431 ACM |
520 | void perf_evlist__id_add(struct perf_evlist *evlist, struct perf_evsel *evsel, |
521 | int cpu, int thread, u64 id) | |
522 | { | |
523 | perf_evlist__id_hash(evlist, evsel, cpu, thread, id); | |
524 | evsel->id[evsel->ids++] = id; | |
525 | } | |
526 | ||
527 | static int perf_evlist__id_add_fd(struct perf_evlist *evlist, | |
528 | struct perf_evsel *evsel, | |
529 | int cpu, int thread, int fd) | |
f8a95309 | 530 | { |
f8a95309 | 531 | u64 read_data[4] = { 0, }; |
3d3b5e95 | 532 | int id_idx = 1; /* The first entry is the counter value */ |
e2b5abe0 JO |
533 | u64 id; |
534 | int ret; | |
535 | ||
536 | ret = ioctl(fd, PERF_EVENT_IOC_ID, &id); | |
537 | if (!ret) | |
538 | goto add; | |
539 | ||
540 | if (errno != ENOTTY) | |
541 | return -1; | |
542 | ||
543 | /* Legacy way to get event id.. All hail to old kernels! */ | |
f8a95309 | 544 | |
c4861afe JO |
545 | /* |
546 | * This way does not work with group format read, so bail | |
547 | * out in that case. | |
548 | */ | |
549 | if (perf_evlist__read_format(evlist) & PERF_FORMAT_GROUP) | |
550 | return -1; | |
551 | ||
f8a95309 ACM |
552 | if (!(evsel->attr.read_format & PERF_FORMAT_ID) || |
553 | read(fd, &read_data, sizeof(read_data)) == -1) | |
554 | return -1; | |
555 | ||
556 | if (evsel->attr.read_format & PERF_FORMAT_TOTAL_TIME_ENABLED) | |
557 | ++id_idx; | |
558 | if (evsel->attr.read_format & PERF_FORMAT_TOTAL_TIME_RUNNING) | |
559 | ++id_idx; | |
560 | ||
e2b5abe0 JO |
561 | id = read_data[id_idx]; |
562 | ||
563 | add: | |
564 | perf_evlist__id_add(evlist, evsel, cpu, thread, id); | |
f8a95309 ACM |
565 | return 0; |
566 | } | |
567 | ||
3c659eed AH |
568 | static void perf_evlist__set_sid_idx(struct perf_evlist *evlist, |
569 | struct perf_evsel *evsel, int idx, int cpu, | |
570 | int thread) | |
571 | { | |
572 | struct perf_sample_id *sid = SID(evsel, cpu, thread); | |
573 | sid->idx = idx; | |
574 | if (evlist->cpus && cpu >= 0) | |
575 | sid->cpu = evlist->cpus->map[cpu]; | |
576 | else | |
577 | sid->cpu = -1; | |
578 | if (!evsel->system_wide && evlist->threads && thread >= 0) | |
e13798c7 | 579 | sid->tid = thread_map__pid(evlist->threads, thread); |
3c659eed AH |
580 | else |
581 | sid->tid = -1; | |
582 | } | |
583 | ||
932a3594 | 584 | struct perf_sample_id *perf_evlist__id2sid(struct perf_evlist *evlist, u64 id) |
70db7533 ACM |
585 | { |
586 | struct hlist_head *head; | |
70db7533 ACM |
587 | struct perf_sample_id *sid; |
588 | int hash; | |
589 | ||
70db7533 ACM |
590 | hash = hash_64(id, PERF_EVLIST__HLIST_BITS); |
591 | head = &evlist->heads[hash]; | |
592 | ||
b67bfe0d | 593 | hlist_for_each_entry(sid, head, node) |
70db7533 | 594 | if (sid->id == id) |
932a3594 JO |
595 | return sid; |
596 | ||
597 | return NULL; | |
598 | } | |
599 | ||
600 | struct perf_evsel *perf_evlist__id2evsel(struct perf_evlist *evlist, u64 id) | |
601 | { | |
602 | struct perf_sample_id *sid; | |
603 | ||
05169df5 | 604 | if (evlist->nr_entries == 1 || !id) |
932a3594 JO |
605 | return perf_evlist__first(evlist); |
606 | ||
607 | sid = perf_evlist__id2sid(evlist, id); | |
608 | if (sid) | |
609 | return sid->evsel; | |
30e68bcc NK |
610 | |
611 | if (!perf_evlist__sample_id_all(evlist)) | |
0c21f736 | 612 | return perf_evlist__first(evlist); |
30e68bcc | 613 | |
70db7533 ACM |
614 | return NULL; |
615 | } | |
04391deb | 616 | |
75562573 AH |
617 | static int perf_evlist__event2id(struct perf_evlist *evlist, |
618 | union perf_event *event, u64 *id) | |
619 | { | |
620 | const u64 *array = event->sample.array; | |
621 | ssize_t n; | |
622 | ||
623 | n = (event->header.size - sizeof(event->header)) >> 3; | |
624 | ||
625 | if (event->header.type == PERF_RECORD_SAMPLE) { | |
626 | if (evlist->id_pos >= n) | |
627 | return -1; | |
628 | *id = array[evlist->id_pos]; | |
629 | } else { | |
630 | if (evlist->is_pos > n) | |
631 | return -1; | |
632 | n -= evlist->is_pos; | |
633 | *id = array[n]; | |
634 | } | |
635 | return 0; | |
636 | } | |
637 | ||
638 | static struct perf_evsel *perf_evlist__event2evsel(struct perf_evlist *evlist, | |
639 | union perf_event *event) | |
640 | { | |
98be6966 | 641 | struct perf_evsel *first = perf_evlist__first(evlist); |
75562573 AH |
642 | struct hlist_head *head; |
643 | struct perf_sample_id *sid; | |
644 | int hash; | |
645 | u64 id; | |
646 | ||
647 | if (evlist->nr_entries == 1) | |
98be6966 AH |
648 | return first; |
649 | ||
650 | if (!first->attr.sample_id_all && | |
651 | event->header.type != PERF_RECORD_SAMPLE) | |
652 | return first; | |
75562573 AH |
653 | |
654 | if (perf_evlist__event2id(evlist, event, &id)) | |
655 | return NULL; | |
656 | ||
657 | /* Synthesized events have an id of zero */ | |
658 | if (!id) | |
98be6966 | 659 | return first; |
75562573 AH |
660 | |
661 | hash = hash_64(id, PERF_EVLIST__HLIST_BITS); | |
662 | head = &evlist->heads[hash]; | |
663 | ||
664 | hlist_for_each_entry(sid, head, node) { | |
665 | if (sid->id == id) | |
666 | return sid->evsel; | |
667 | } | |
668 | return NULL; | |
669 | } | |
670 | ||
aece948f | 671 | union perf_event *perf_evlist__mmap_read(struct perf_evlist *evlist, int idx) |
04391deb | 672 | { |
aece948f | 673 | struct perf_mmap *md = &evlist->mmap[idx]; |
7951722d | 674 | u64 head; |
7b8283b5 | 675 | u64 old = md->prev; |
04391deb | 676 | unsigned char *data = md->base + page_size; |
8115d60c | 677 | union perf_event *event = NULL; |
04391deb | 678 | |
7951722d SB |
679 | /* |
680 | * Check if event was unmapped due to a POLLHUP/POLLERR. | |
681 | */ | |
682 | if (!atomic_read(&md->refcnt)) | |
683 | return NULL; | |
684 | ||
685 | head = perf_mmap__read_head(md); | |
7bb41152 | 686 | if (evlist->overwrite) { |
04391deb | 687 | /* |
7bb41152 ACM |
688 | * If we're further behind than half the buffer, there's a chance |
689 | * the writer will bite our tail and mess up the samples under us. | |
690 | * | |
691 | * If we somehow ended up ahead of the head, we got messed up. | |
692 | * | |
693 | * In either case, truncate and restart at head. | |
04391deb | 694 | */ |
7bb41152 ACM |
695 | int diff = head - old; |
696 | if (diff > md->mask / 2 || diff < 0) { | |
697 | fprintf(stderr, "WARNING: failed to keep up with mmap data.\n"); | |
698 | ||
699 | /* | |
700 | * head points to a known good entry, start there. | |
701 | */ | |
702 | old = head; | |
703 | } | |
04391deb ACM |
704 | } |
705 | ||
706 | if (old != head) { | |
707 | size_t size; | |
708 | ||
8115d60c | 709 | event = (union perf_event *)&data[old & md->mask]; |
04391deb ACM |
710 | size = event->header.size; |
711 | ||
712 | /* | |
713 | * Event straddles the mmap boundary -- header should always | |
714 | * be inside due to u64 alignment of output. | |
715 | */ | |
716 | if ((old & md->mask) + size != ((old + size) & md->mask)) { | |
717 | unsigned int offset = old; | |
718 | unsigned int len = min(sizeof(*event), size), cpy; | |
a65cb4b9 | 719 | void *dst = md->event_copy; |
04391deb ACM |
720 | |
721 | do { | |
722 | cpy = min(md->mask + 1 - (offset & md->mask), len); | |
723 | memcpy(dst, &data[offset & md->mask], cpy); | |
724 | offset += cpy; | |
725 | dst += cpy; | |
726 | len -= cpy; | |
727 | } while (len); | |
728 | ||
a65cb4b9 | 729 | event = (union perf_event *) md->event_copy; |
04391deb ACM |
730 | } |
731 | ||
732 | old += size; | |
733 | } | |
734 | ||
735 | md->prev = old; | |
7bb41152 | 736 | |
04391deb ACM |
737 | return event; |
738 | } | |
f8a95309 | 739 | |
82396986 ACM |
740 | static bool perf_mmap__empty(struct perf_mmap *md) |
741 | { | |
b72e74d1 | 742 | return perf_mmap__read_head(md) == md->prev && !md->auxtrace_mmap.base; |
82396986 ACM |
743 | } |
744 | ||
745 | static void perf_evlist__mmap_get(struct perf_evlist *evlist, int idx) | |
746 | { | |
7143849a | 747 | atomic_inc(&evlist->mmap[idx].refcnt); |
82396986 ACM |
748 | } |
749 | ||
750 | static void perf_evlist__mmap_put(struct perf_evlist *evlist, int idx) | |
751 | { | |
7143849a | 752 | BUG_ON(atomic_read(&evlist->mmap[idx].refcnt) == 0); |
82396986 | 753 | |
7143849a | 754 | if (atomic_dec_and_test(&evlist->mmap[idx].refcnt)) |
82396986 ACM |
755 | __perf_evlist__munmap(evlist, idx); |
756 | } | |
757 | ||
8e50d384 ZZ |
758 | void perf_evlist__mmap_consume(struct perf_evlist *evlist, int idx) |
759 | { | |
82396986 ACM |
760 | struct perf_mmap *md = &evlist->mmap[idx]; |
761 | ||
8e50d384 | 762 | if (!evlist->overwrite) { |
7b8283b5 | 763 | u64 old = md->prev; |
8e50d384 ZZ |
764 | |
765 | perf_mmap__write_tail(md, old); | |
766 | } | |
82396986 | 767 | |
7143849a | 768 | if (atomic_read(&md->refcnt) == 1 && perf_mmap__empty(md)) |
82396986 | 769 | perf_evlist__mmap_put(evlist, idx); |
8e50d384 ZZ |
770 | } |
771 | ||
718c602d AH |
772 | int __weak auxtrace_mmap__mmap(struct auxtrace_mmap *mm __maybe_unused, |
773 | struct auxtrace_mmap_params *mp __maybe_unused, | |
774 | void *userpg __maybe_unused, | |
775 | int fd __maybe_unused) | |
776 | { | |
777 | return 0; | |
778 | } | |
779 | ||
780 | void __weak auxtrace_mmap__munmap(struct auxtrace_mmap *mm __maybe_unused) | |
781 | { | |
782 | } | |
783 | ||
784 | void __weak auxtrace_mmap_params__init( | |
785 | struct auxtrace_mmap_params *mp __maybe_unused, | |
786 | off_t auxtrace_offset __maybe_unused, | |
787 | unsigned int auxtrace_pages __maybe_unused, | |
788 | bool auxtrace_overwrite __maybe_unused) | |
789 | { | |
790 | } | |
791 | ||
792 | void __weak auxtrace_mmap_params__set_idx( | |
793 | struct auxtrace_mmap_params *mp __maybe_unused, | |
794 | struct perf_evlist *evlist __maybe_unused, | |
795 | int idx __maybe_unused, | |
796 | bool per_cpu __maybe_unused) | |
797 | { | |
798 | } | |
799 | ||
93edcbd9 AH |
800 | static void __perf_evlist__munmap(struct perf_evlist *evlist, int idx) |
801 | { | |
802 | if (evlist->mmap[idx].base != NULL) { | |
803 | munmap(evlist->mmap[idx].base, evlist->mmap_len); | |
804 | evlist->mmap[idx].base = NULL; | |
7143849a | 805 | atomic_set(&evlist->mmap[idx].refcnt, 0); |
93edcbd9 | 806 | } |
718c602d | 807 | auxtrace_mmap__munmap(&evlist->mmap[idx].auxtrace_mmap); |
93edcbd9 AH |
808 | } |
809 | ||
7e2ed097 | 810 | void perf_evlist__munmap(struct perf_evlist *evlist) |
f8a95309 | 811 | { |
aece948f | 812 | int i; |
f8a95309 | 813 | |
983874d1 ACM |
814 | if (evlist->mmap == NULL) |
815 | return; | |
816 | ||
93edcbd9 AH |
817 | for (i = 0; i < evlist->nr_mmaps; i++) |
818 | __perf_evlist__munmap(evlist, i); | |
aece948f | 819 | |
04662523 | 820 | zfree(&evlist->mmap); |
f8a95309 ACM |
821 | } |
822 | ||
806fb630 | 823 | static int perf_evlist__alloc_mmap(struct perf_evlist *evlist) |
f8a95309 | 824 | { |
a14bb7a6 | 825 | evlist->nr_mmaps = cpu_map__nr(evlist->cpus); |
ec1e7e43 | 826 | if (cpu_map__empty(evlist->cpus)) |
b3a319d5 | 827 | evlist->nr_mmaps = thread_map__nr(evlist->threads); |
aece948f | 828 | evlist->mmap = zalloc(evlist->nr_mmaps * sizeof(struct perf_mmap)); |
f8a95309 ACM |
829 | return evlist->mmap != NULL ? 0 : -ENOMEM; |
830 | } | |
831 | ||
a8a8f3eb AH |
832 | struct mmap_params { |
833 | int prot; | |
834 | int mask; | |
718c602d | 835 | struct auxtrace_mmap_params auxtrace_mp; |
a8a8f3eb AH |
836 | }; |
837 | ||
838 | static int __perf_evlist__mmap(struct perf_evlist *evlist, int idx, | |
839 | struct mmap_params *mp, int fd) | |
f8a95309 | 840 | { |
82396986 ACM |
841 | /* |
842 | * The last one will be done at perf_evlist__mmap_consume(), so that we | |
843 | * make sure we don't prevent tools from consuming every last event in | |
844 | * the ring buffer. | |
845 | * | |
846 | * I.e. we can get the POLLHUP meaning that the fd doesn't exist | |
847 | * anymore, but the last events for it are still in the ring buffer, | |
848 | * waiting to be consumed. | |
849 | * | |
850 | * Tools can chose to ignore this at their own discretion, but the | |
851 | * evlist layer can't just drop it when filtering events in | |
852 | * perf_evlist__filter_pollfd(). | |
853 | */ | |
7143849a | 854 | atomic_set(&evlist->mmap[idx].refcnt, 2); |
aece948f | 855 | evlist->mmap[idx].prev = 0; |
a8a8f3eb AH |
856 | evlist->mmap[idx].mask = mp->mask; |
857 | evlist->mmap[idx].base = mmap(NULL, evlist->mmap_len, mp->prot, | |
f8a95309 | 858 | MAP_SHARED, fd, 0); |
301b195d | 859 | if (evlist->mmap[idx].base == MAP_FAILED) { |
02635965 AH |
860 | pr_debug2("failed to mmap perf event ring buffer, error %d\n", |
861 | errno); | |
301b195d | 862 | evlist->mmap[idx].base = NULL; |
f8a95309 | 863 | return -1; |
301b195d | 864 | } |
ad6765dd | 865 | |
718c602d AH |
866 | if (auxtrace_mmap__mmap(&evlist->mmap[idx].auxtrace_mmap, |
867 | &mp->auxtrace_mp, evlist->mmap[idx].base, fd)) | |
868 | return -1; | |
869 | ||
f8a95309 ACM |
870 | return 0; |
871 | } | |
872 | ||
04e21314 | 873 | static int perf_evlist__mmap_per_evsel(struct perf_evlist *evlist, int idx, |
a8a8f3eb AH |
874 | struct mmap_params *mp, int cpu, |
875 | int thread, int *output) | |
aece948f ACM |
876 | { |
877 | struct perf_evsel *evsel; | |
04e21314 | 878 | |
0050f7aa | 879 | evlist__for_each(evlist, evsel) { |
bf8e8f4b AH |
880 | int fd; |
881 | ||
882 | if (evsel->system_wide && thread) | |
883 | continue; | |
884 | ||
885 | fd = FD(evsel, cpu, thread); | |
04e21314 AH |
886 | |
887 | if (*output == -1) { | |
888 | *output = fd; | |
a8a8f3eb | 889 | if (__perf_evlist__mmap(evlist, idx, mp, *output) < 0) |
04e21314 AH |
890 | return -1; |
891 | } else { | |
892 | if (ioctl(fd, PERF_EVENT_IOC_SET_OUTPUT, *output) != 0) | |
893 | return -1; | |
82396986 ACM |
894 | |
895 | perf_evlist__mmap_get(evlist, idx); | |
04e21314 AH |
896 | } |
897 | ||
f90d194a AH |
898 | /* |
899 | * The system_wide flag causes a selected event to be opened | |
900 | * always without a pid. Consequently it will never get a | |
901 | * POLLHUP, but it is used for tracking in combination with | |
902 | * other events, so it should not need to be polled anyway. | |
903 | * Therefore don't add it for polling. | |
904 | */ | |
905 | if (!evsel->system_wide && | |
906 | __perf_evlist__add_pollfd(evlist, fd, idx) < 0) { | |
82396986 | 907 | perf_evlist__mmap_put(evlist, idx); |
ad6765dd | 908 | return -1; |
82396986 | 909 | } |
033fa713 | 910 | |
3c659eed AH |
911 | if (evsel->attr.read_format & PERF_FORMAT_ID) { |
912 | if (perf_evlist__id_add_fd(evlist, evsel, cpu, thread, | |
913 | fd) < 0) | |
914 | return -1; | |
915 | perf_evlist__set_sid_idx(evlist, evsel, idx, cpu, | |
916 | thread); | |
917 | } | |
04e21314 AH |
918 | } |
919 | ||
920 | return 0; | |
921 | } | |
922 | ||
a8a8f3eb AH |
923 | static int perf_evlist__mmap_per_cpu(struct perf_evlist *evlist, |
924 | struct mmap_params *mp) | |
04e21314 | 925 | { |
aece948f | 926 | int cpu, thread; |
b3a319d5 NK |
927 | int nr_cpus = cpu_map__nr(evlist->cpus); |
928 | int nr_threads = thread_map__nr(evlist->threads); | |
aece948f | 929 | |
e3e1a54f | 930 | pr_debug2("perf event ring buffer mmapped per cpu\n"); |
b3a319d5 | 931 | for (cpu = 0; cpu < nr_cpus; cpu++) { |
aece948f ACM |
932 | int output = -1; |
933 | ||
718c602d AH |
934 | auxtrace_mmap_params__set_idx(&mp->auxtrace_mp, evlist, cpu, |
935 | true); | |
936 | ||
b3a319d5 | 937 | for (thread = 0; thread < nr_threads; thread++) { |
a8a8f3eb AH |
938 | if (perf_evlist__mmap_per_evsel(evlist, cpu, mp, cpu, |
939 | thread, &output)) | |
04e21314 | 940 | goto out_unmap; |
aece948f ACM |
941 | } |
942 | } | |
943 | ||
944 | return 0; | |
945 | ||
946 | out_unmap: | |
93edcbd9 AH |
947 | for (cpu = 0; cpu < nr_cpus; cpu++) |
948 | __perf_evlist__munmap(evlist, cpu); | |
aece948f ACM |
949 | return -1; |
950 | } | |
951 | ||
a8a8f3eb AH |
952 | static int perf_evlist__mmap_per_thread(struct perf_evlist *evlist, |
953 | struct mmap_params *mp) | |
aece948f | 954 | { |
aece948f | 955 | int thread; |
b3a319d5 | 956 | int nr_threads = thread_map__nr(evlist->threads); |
aece948f | 957 | |
e3e1a54f | 958 | pr_debug2("perf event ring buffer mmapped per thread\n"); |
b3a319d5 | 959 | for (thread = 0; thread < nr_threads; thread++) { |
aece948f ACM |
960 | int output = -1; |
961 | ||
718c602d AH |
962 | auxtrace_mmap_params__set_idx(&mp->auxtrace_mp, evlist, thread, |
963 | false); | |
964 | ||
a8a8f3eb AH |
965 | if (perf_evlist__mmap_per_evsel(evlist, thread, mp, 0, thread, |
966 | &output)) | |
04e21314 | 967 | goto out_unmap; |
aece948f ACM |
968 | } |
969 | ||
970 | return 0; | |
971 | ||
972 | out_unmap: | |
93edcbd9 AH |
973 | for (thread = 0; thread < nr_threads; thread++) |
974 | __perf_evlist__munmap(evlist, thread); | |
aece948f ACM |
975 | return -1; |
976 | } | |
977 | ||
994a1f78 JO |
978 | static size_t perf_evlist__mmap_size(unsigned long pages) |
979 | { | |
8185e881 ACM |
980 | if (pages == UINT_MAX) { |
981 | int max; | |
982 | ||
983 | if (sysctl__read_int("kernel/perf_event_mlock_kb", &max) < 0) { | |
984 | /* | |
985 | * Pick a once upon a time good value, i.e. things look | |
986 | * strange since we can't read a sysctl value, but lets not | |
987 | * die yet... | |
988 | */ | |
989 | max = 512; | |
990 | } else { | |
991 | max -= (page_size / 1024); | |
992 | } | |
993 | ||
994 | pages = (max * 1024) / page_size; | |
1be300f4 ACM |
995 | if (!is_power_of_2(pages)) |
996 | pages = rounddown_pow_of_two(pages); | |
8185e881 | 997 | } else if (!is_power_of_2(pages)) |
994a1f78 JO |
998 | return 0; |
999 | ||
1000 | return (pages + 1) * page_size; | |
1001 | } | |
1002 | ||
33c2dcfd DA |
1003 | static long parse_pages_arg(const char *str, unsigned long min, |
1004 | unsigned long max) | |
994a1f78 | 1005 | { |
2fbe4abe | 1006 | unsigned long pages, val; |
27050f53 JO |
1007 | static struct parse_tag tags[] = { |
1008 | { .tag = 'B', .mult = 1 }, | |
1009 | { .tag = 'K', .mult = 1 << 10 }, | |
1010 | { .tag = 'M', .mult = 1 << 20 }, | |
1011 | { .tag = 'G', .mult = 1 << 30 }, | |
1012 | { .tag = 0 }, | |
1013 | }; | |
994a1f78 | 1014 | |
8973504b | 1015 | if (str == NULL) |
33c2dcfd | 1016 | return -EINVAL; |
8973504b | 1017 | |
27050f53 | 1018 | val = parse_tag_value(str, tags); |
2fbe4abe | 1019 | if (val != (unsigned long) -1) { |
27050f53 JO |
1020 | /* we got file size value */ |
1021 | pages = PERF_ALIGN(val, page_size) / page_size; | |
27050f53 JO |
1022 | } else { |
1023 | /* we got pages count value */ | |
1024 | char *eptr; | |
1025 | pages = strtoul(str, &eptr, 10); | |
33c2dcfd DA |
1026 | if (*eptr != '\0') |
1027 | return -EINVAL; | |
994a1f78 JO |
1028 | } |
1029 | ||
2bcab6c1 | 1030 | if (pages == 0 && min == 0) { |
33c2dcfd | 1031 | /* leave number of pages at 0 */ |
1dbfa938 | 1032 | } else if (!is_power_of_2(pages)) { |
33c2dcfd | 1033 | /* round pages up to next power of 2 */ |
91529834 | 1034 | pages = roundup_pow_of_two(pages); |
1dbfa938 AH |
1035 | if (!pages) |
1036 | return -EINVAL; | |
9639837e DA |
1037 | pr_info("rounding mmap pages size to %lu bytes (%lu pages)\n", |
1038 | pages * page_size, pages); | |
2fbe4abe AH |
1039 | } |
1040 | ||
33c2dcfd DA |
1041 | if (pages > max) |
1042 | return -EINVAL; | |
1043 | ||
1044 | return pages; | |
1045 | } | |
1046 | ||
e9db1310 | 1047 | int __perf_evlist__parse_mmap_pages(unsigned int *mmap_pages, const char *str) |
33c2dcfd | 1048 | { |
33c2dcfd DA |
1049 | unsigned long max = UINT_MAX; |
1050 | long pages; | |
1051 | ||
f5ae9c42 | 1052 | if (max > SIZE_MAX / page_size) |
33c2dcfd DA |
1053 | max = SIZE_MAX / page_size; |
1054 | ||
1055 | pages = parse_pages_arg(str, 1, max); | |
1056 | if (pages < 0) { | |
1057 | pr_err("Invalid argument for --mmap_pages/-m\n"); | |
994a1f78 JO |
1058 | return -1; |
1059 | } | |
1060 | ||
1061 | *mmap_pages = pages; | |
1062 | return 0; | |
1063 | } | |
1064 | ||
e9db1310 AH |
1065 | int perf_evlist__parse_mmap_pages(const struct option *opt, const char *str, |
1066 | int unset __maybe_unused) | |
1067 | { | |
1068 | return __perf_evlist__parse_mmap_pages(opt->value, str); | |
1069 | } | |
1070 | ||
c83fa7f2 | 1071 | /** |
718c602d | 1072 | * perf_evlist__mmap_ex - Create mmaps to receive events. |
c83fa7f2 AH |
1073 | * @evlist: list of events |
1074 | * @pages: map length in pages | |
1075 | * @overwrite: overwrite older events? | |
718c602d AH |
1076 | * @auxtrace_pages - auxtrace map length in pages |
1077 | * @auxtrace_overwrite - overwrite older auxtrace data? | |
f8a95309 | 1078 | * |
c83fa7f2 AH |
1079 | * If @overwrite is %false the user needs to signal event consumption using |
1080 | * perf_mmap__write_tail(). Using perf_evlist__mmap_read() does this | |
1081 | * automatically. | |
7e2ed097 | 1082 | * |
718c602d AH |
1083 | * Similarly, if @auxtrace_overwrite is %false the user needs to signal data |
1084 | * consumption using auxtrace_mmap__write_tail(). | |
1085 | * | |
c83fa7f2 | 1086 | * Return: %0 on success, negative error code otherwise. |
f8a95309 | 1087 | */ |
718c602d AH |
1088 | int perf_evlist__mmap_ex(struct perf_evlist *evlist, unsigned int pages, |
1089 | bool overwrite, unsigned int auxtrace_pages, | |
1090 | bool auxtrace_overwrite) | |
f8a95309 | 1091 | { |
aece948f | 1092 | struct perf_evsel *evsel; |
7e2ed097 ACM |
1093 | const struct cpu_map *cpus = evlist->cpus; |
1094 | const struct thread_map *threads = evlist->threads; | |
a8a8f3eb AH |
1095 | struct mmap_params mp = { |
1096 | .prot = PROT_READ | (overwrite ? 0 : PROT_WRITE), | |
1097 | }; | |
50a682ce | 1098 | |
7e2ed097 | 1099 | if (evlist->mmap == NULL && perf_evlist__alloc_mmap(evlist) < 0) |
f8a95309 ACM |
1100 | return -ENOMEM; |
1101 | ||
1b85337d | 1102 | if (evlist->pollfd.entries == NULL && perf_evlist__alloc_pollfd(evlist) < 0) |
f8a95309 ACM |
1103 | return -ENOMEM; |
1104 | ||
1105 | evlist->overwrite = overwrite; | |
994a1f78 | 1106 | evlist->mmap_len = perf_evlist__mmap_size(pages); |
2af68ef5 | 1107 | pr_debug("mmap size %zuB\n", evlist->mmap_len); |
a8a8f3eb | 1108 | mp.mask = evlist->mmap_len - page_size - 1; |
f8a95309 | 1109 | |
718c602d AH |
1110 | auxtrace_mmap_params__init(&mp.auxtrace_mp, evlist->mmap_len, |
1111 | auxtrace_pages, auxtrace_overwrite); | |
1112 | ||
0050f7aa | 1113 | evlist__for_each(evlist, evsel) { |
f8a95309 | 1114 | if ((evsel->attr.read_format & PERF_FORMAT_ID) && |
a91e5431 | 1115 | evsel->sample_id == NULL && |
a14bb7a6 | 1116 | perf_evsel__alloc_id(evsel, cpu_map__nr(cpus), threads->nr) < 0) |
f8a95309 | 1117 | return -ENOMEM; |
f8a95309 ACM |
1118 | } |
1119 | ||
ec1e7e43 | 1120 | if (cpu_map__empty(cpus)) |
a8a8f3eb | 1121 | return perf_evlist__mmap_per_thread(evlist, &mp); |
f8a95309 | 1122 | |
a8a8f3eb | 1123 | return perf_evlist__mmap_per_cpu(evlist, &mp); |
f8a95309 | 1124 | } |
7e2ed097 | 1125 | |
718c602d AH |
1126 | int perf_evlist__mmap(struct perf_evlist *evlist, unsigned int pages, |
1127 | bool overwrite) | |
1128 | { | |
1129 | return perf_evlist__mmap_ex(evlist, pages, overwrite, 0, false); | |
1130 | } | |
1131 | ||
602ad878 | 1132 | int perf_evlist__create_maps(struct perf_evlist *evlist, struct target *target) |
7e2ed097 | 1133 | { |
74bfd2b2 AH |
1134 | struct cpu_map *cpus; |
1135 | struct thread_map *threads; | |
7e2ed097 | 1136 | |
74bfd2b2 AH |
1137 | threads = thread_map__new_str(target->pid, target->tid, target->uid); |
1138 | ||
1139 | if (!threads) | |
7e2ed097 ACM |
1140 | return -1; |
1141 | ||
9c105fbc | 1142 | if (target__uses_dummy_map(target)) |
74bfd2b2 | 1143 | cpus = cpu_map__dummy_new(); |
879d77d0 | 1144 | else |
74bfd2b2 | 1145 | cpus = cpu_map__new(target->cpu_list); |
7e2ed097 | 1146 | |
74bfd2b2 | 1147 | if (!cpus) |
7e2ed097 ACM |
1148 | goto out_delete_threads; |
1149 | ||
ec9a77a7 AH |
1150 | evlist->has_user_cpus = !!target->cpu_list; |
1151 | ||
74bfd2b2 | 1152 | perf_evlist__set_maps(evlist, cpus, threads); |
d5bc056e AH |
1153 | |
1154 | return 0; | |
7e2ed097 ACM |
1155 | |
1156 | out_delete_threads: | |
74bfd2b2 | 1157 | thread_map__put(threads); |
7e2ed097 ACM |
1158 | return -1; |
1159 | } | |
1160 | ||
d5bc056e AH |
1161 | void perf_evlist__set_maps(struct perf_evlist *evlist, struct cpu_map *cpus, |
1162 | struct thread_map *threads) | |
3de5cfb0 | 1163 | { |
934e0f20 AH |
1164 | /* |
1165 | * Allow for the possibility that one or another of the maps isn't being | |
1166 | * changed i.e. don't put it. Note we are assuming the maps that are | |
1167 | * being applied are brand new and evlist is taking ownership of the | |
1168 | * original reference count of 1. If that is not the case it is up to | |
1169 | * the caller to increase the reference count. | |
1170 | */ | |
1171 | if (cpus != evlist->cpus) { | |
1172 | cpu_map__put(evlist->cpus); | |
1173 | evlist->cpus = cpus; | |
1174 | } | |
3de5cfb0 | 1175 | |
934e0f20 AH |
1176 | if (threads != evlist->threads) { |
1177 | thread_map__put(evlist->threads); | |
1178 | evlist->threads = threads; | |
1179 | } | |
3de5cfb0 | 1180 | |
ec9a77a7 | 1181 | perf_evlist__propagate_maps(evlist); |
3de5cfb0 JO |
1182 | } |
1183 | ||
23d4aad4 | 1184 | int perf_evlist__apply_filters(struct perf_evlist *evlist, struct perf_evsel **err_evsel) |
0a102479 | 1185 | { |
0a102479 | 1186 | struct perf_evsel *evsel; |
745cefc5 ACM |
1187 | int err = 0; |
1188 | const int ncpus = cpu_map__nr(evlist->cpus), | |
b3a319d5 | 1189 | nthreads = thread_map__nr(evlist->threads); |
0a102479 | 1190 | |
0050f7aa | 1191 | evlist__for_each(evlist, evsel) { |
745cefc5 | 1192 | if (evsel->filter == NULL) |
0a102479 | 1193 | continue; |
745cefc5 | 1194 | |
d988d5ee KL |
1195 | /* |
1196 | * filters only work for tracepoint event, which doesn't have cpu limit. | |
1197 | * So evlist and evsel should always be same. | |
1198 | */ | |
f47805a2 | 1199 | err = perf_evsel__apply_filter(evsel, ncpus, nthreads, evsel->filter); |
23d4aad4 ACM |
1200 | if (err) { |
1201 | *err_evsel = evsel; | |
745cefc5 | 1202 | break; |
23d4aad4 | 1203 | } |
0a102479 FW |
1204 | } |
1205 | ||
745cefc5 ACM |
1206 | return err; |
1207 | } | |
1208 | ||
1209 | int perf_evlist__set_filter(struct perf_evlist *evlist, const char *filter) | |
1210 | { | |
1211 | struct perf_evsel *evsel; | |
1212 | int err = 0; | |
745cefc5 | 1213 | |
0050f7aa | 1214 | evlist__for_each(evlist, evsel) { |
94ad89bc | 1215 | err = perf_evsel__set_filter(evsel, filter); |
745cefc5 ACM |
1216 | if (err) |
1217 | break; | |
1218 | } | |
1219 | ||
1220 | return err; | |
0a102479 | 1221 | } |
74429964 | 1222 | |
be199ada | 1223 | int perf_evlist__set_filter_pids(struct perf_evlist *evlist, size_t npids, pid_t *pids) |
cfd70a26 ACM |
1224 | { |
1225 | char *filter; | |
be199ada ACM |
1226 | int ret = -1; |
1227 | size_t i; | |
cfd70a26 | 1228 | |
be199ada ACM |
1229 | for (i = 0; i < npids; ++i) { |
1230 | if (i == 0) { | |
1231 | if (asprintf(&filter, "common_pid != %d", pids[i]) < 0) | |
1232 | return -1; | |
1233 | } else { | |
1234 | char *tmp; | |
1235 | ||
1236 | if (asprintf(&tmp, "%s && common_pid != %d", filter, pids[i]) < 0) | |
1237 | goto out_free; | |
1238 | ||
1239 | free(filter); | |
1240 | filter = tmp; | |
1241 | } | |
1242 | } | |
cfd70a26 ACM |
1243 | |
1244 | ret = perf_evlist__set_filter(evlist, filter); | |
be199ada | 1245 | out_free: |
cfd70a26 ACM |
1246 | free(filter); |
1247 | return ret; | |
1248 | } | |
1249 | ||
be199ada ACM |
1250 | int perf_evlist__set_filter_pid(struct perf_evlist *evlist, pid_t pid) |
1251 | { | |
1252 | return perf_evlist__set_filter_pids(evlist, 1, &pid); | |
1253 | } | |
1254 | ||
0c21f736 | 1255 | bool perf_evlist__valid_sample_type(struct perf_evlist *evlist) |
74429964 | 1256 | { |
75562573 | 1257 | struct perf_evsel *pos; |
c2a70653 | 1258 | |
75562573 AH |
1259 | if (evlist->nr_entries == 1) |
1260 | return true; | |
1261 | ||
1262 | if (evlist->id_pos < 0 || evlist->is_pos < 0) | |
1263 | return false; | |
1264 | ||
0050f7aa | 1265 | evlist__for_each(evlist, pos) { |
75562573 AH |
1266 | if (pos->id_pos != evlist->id_pos || |
1267 | pos->is_pos != evlist->is_pos) | |
c2a70653 | 1268 | return false; |
74429964 FW |
1269 | } |
1270 | ||
c2a70653 | 1271 | return true; |
74429964 FW |
1272 | } |
1273 | ||
75562573 | 1274 | u64 __perf_evlist__combined_sample_type(struct perf_evlist *evlist) |
c2a70653 | 1275 | { |
75562573 AH |
1276 | struct perf_evsel *evsel; |
1277 | ||
1278 | if (evlist->combined_sample_type) | |
1279 | return evlist->combined_sample_type; | |
1280 | ||
0050f7aa | 1281 | evlist__for_each(evlist, evsel) |
75562573 AH |
1282 | evlist->combined_sample_type |= evsel->attr.sample_type; |
1283 | ||
1284 | return evlist->combined_sample_type; | |
1285 | } | |
1286 | ||
1287 | u64 perf_evlist__combined_sample_type(struct perf_evlist *evlist) | |
1288 | { | |
1289 | evlist->combined_sample_type = 0; | |
1290 | return __perf_evlist__combined_sample_type(evlist); | |
c2a70653 ACM |
1291 | } |
1292 | ||
98df858e AK |
1293 | u64 perf_evlist__combined_branch_type(struct perf_evlist *evlist) |
1294 | { | |
1295 | struct perf_evsel *evsel; | |
1296 | u64 branch_type = 0; | |
1297 | ||
1298 | evlist__for_each(evlist, evsel) | |
1299 | branch_type |= evsel->attr.branch_sample_type; | |
1300 | return branch_type; | |
1301 | } | |
1302 | ||
9ede473c JO |
1303 | bool perf_evlist__valid_read_format(struct perf_evlist *evlist) |
1304 | { | |
1305 | struct perf_evsel *first = perf_evlist__first(evlist), *pos = first; | |
1306 | u64 read_format = first->attr.read_format; | |
1307 | u64 sample_type = first->attr.sample_type; | |
1308 | ||
0050f7aa | 1309 | evlist__for_each(evlist, pos) { |
9ede473c JO |
1310 | if (read_format != pos->attr.read_format) |
1311 | return false; | |
1312 | } | |
1313 | ||
1314 | /* PERF_SAMPLE_READ imples PERF_FORMAT_ID. */ | |
1315 | if ((sample_type & PERF_SAMPLE_READ) && | |
1316 | !(read_format & PERF_FORMAT_ID)) { | |
1317 | return false; | |
1318 | } | |
1319 | ||
1320 | return true; | |
1321 | } | |
1322 | ||
1323 | u64 perf_evlist__read_format(struct perf_evlist *evlist) | |
1324 | { | |
1325 | struct perf_evsel *first = perf_evlist__first(evlist); | |
1326 | return first->attr.read_format; | |
1327 | } | |
1328 | ||
0c21f736 | 1329 | u16 perf_evlist__id_hdr_size(struct perf_evlist *evlist) |
81e36bff | 1330 | { |
0c21f736 | 1331 | struct perf_evsel *first = perf_evlist__first(evlist); |
81e36bff ACM |
1332 | struct perf_sample *data; |
1333 | u64 sample_type; | |
1334 | u16 size = 0; | |
1335 | ||
81e36bff ACM |
1336 | if (!first->attr.sample_id_all) |
1337 | goto out; | |
1338 | ||
1339 | sample_type = first->attr.sample_type; | |
1340 | ||
1341 | if (sample_type & PERF_SAMPLE_TID) | |
1342 | size += sizeof(data->tid) * 2; | |
1343 | ||
1344 | if (sample_type & PERF_SAMPLE_TIME) | |
1345 | size += sizeof(data->time); | |
1346 | ||
1347 | if (sample_type & PERF_SAMPLE_ID) | |
1348 | size += sizeof(data->id); | |
1349 | ||
1350 | if (sample_type & PERF_SAMPLE_STREAM_ID) | |
1351 | size += sizeof(data->stream_id); | |
1352 | ||
1353 | if (sample_type & PERF_SAMPLE_CPU) | |
1354 | size += sizeof(data->cpu) * 2; | |
75562573 AH |
1355 | |
1356 | if (sample_type & PERF_SAMPLE_IDENTIFIER) | |
1357 | size += sizeof(data->id); | |
81e36bff ACM |
1358 | out: |
1359 | return size; | |
1360 | } | |
1361 | ||
0c21f736 | 1362 | bool perf_evlist__valid_sample_id_all(struct perf_evlist *evlist) |
74429964 | 1363 | { |
0c21f736 | 1364 | struct perf_evsel *first = perf_evlist__first(evlist), *pos = first; |
c2a70653 | 1365 | |
0050f7aa | 1366 | evlist__for_each_continue(evlist, pos) { |
c2a70653 ACM |
1367 | if (first->attr.sample_id_all != pos->attr.sample_id_all) |
1368 | return false; | |
74429964 FW |
1369 | } |
1370 | ||
c2a70653 ACM |
1371 | return true; |
1372 | } | |
1373 | ||
0c21f736 | 1374 | bool perf_evlist__sample_id_all(struct perf_evlist *evlist) |
c2a70653 | 1375 | { |
0c21f736 | 1376 | struct perf_evsel *first = perf_evlist__first(evlist); |
c2a70653 | 1377 | return first->attr.sample_id_all; |
74429964 | 1378 | } |
81cce8de ACM |
1379 | |
1380 | void perf_evlist__set_selected(struct perf_evlist *evlist, | |
1381 | struct perf_evsel *evsel) | |
1382 | { | |
1383 | evlist->selected = evsel; | |
1384 | } | |
727ab04e | 1385 | |
a74b4b66 NK |
1386 | void perf_evlist__close(struct perf_evlist *evlist) |
1387 | { | |
1388 | struct perf_evsel *evsel; | |
1389 | int ncpus = cpu_map__nr(evlist->cpus); | |
1390 | int nthreads = thread_map__nr(evlist->threads); | |
8ad9219e | 1391 | int n; |
a74b4b66 | 1392 | |
8ad9219e SE |
1393 | evlist__for_each_reverse(evlist, evsel) { |
1394 | n = evsel->cpus ? evsel->cpus->nr : ncpus; | |
1395 | perf_evsel__close(evsel, n, nthreads); | |
1396 | } | |
a74b4b66 NK |
1397 | } |
1398 | ||
4112eb18 ACM |
1399 | static int perf_evlist__create_syswide_maps(struct perf_evlist *evlist) |
1400 | { | |
1401 | int err = -ENOMEM; | |
1402 | ||
1403 | /* | |
1404 | * Try reading /sys/devices/system/cpu/online to get | |
1405 | * an all cpus map. | |
1406 | * | |
1407 | * FIXME: -ENOMEM is the best we can do here, the cpu_map | |
1408 | * code needs an overhaul to properly forward the | |
1409 | * error, and we may not want to do that fallback to a | |
1410 | * default cpu identity map :-\ | |
1411 | */ | |
1412 | evlist->cpus = cpu_map__new(NULL); | |
1413 | if (evlist->cpus == NULL) | |
1414 | goto out; | |
1415 | ||
1416 | evlist->threads = thread_map__new_dummy(); | |
1417 | if (evlist->threads == NULL) | |
1418 | goto out_free_cpus; | |
1419 | ||
1420 | err = 0; | |
1421 | out: | |
1422 | return err; | |
1423 | out_free_cpus: | |
f30a79b0 | 1424 | cpu_map__put(evlist->cpus); |
4112eb18 ACM |
1425 | evlist->cpus = NULL; |
1426 | goto out; | |
1427 | } | |
1428 | ||
6a4bb04c | 1429 | int perf_evlist__open(struct perf_evlist *evlist) |
727ab04e | 1430 | { |
6a4bb04c | 1431 | struct perf_evsel *evsel; |
a74b4b66 | 1432 | int err; |
727ab04e | 1433 | |
4112eb18 ACM |
1434 | /* |
1435 | * Default: one fd per CPU, all threads, aka systemwide | |
1436 | * as sys_perf_event_open(cpu = -1, thread = -1) is EINVAL | |
1437 | */ | |
1438 | if (evlist->threads == NULL && evlist->cpus == NULL) { | |
1439 | err = perf_evlist__create_syswide_maps(evlist); | |
1440 | if (err < 0) | |
1441 | goto out_err; | |
1442 | } | |
1443 | ||
733cd2fe AH |
1444 | perf_evlist__update_id_pos(evlist); |
1445 | ||
0050f7aa | 1446 | evlist__for_each(evlist, evsel) { |
6a4bb04c | 1447 | err = perf_evsel__open(evsel, evlist->cpus, evlist->threads); |
727ab04e ACM |
1448 | if (err < 0) |
1449 | goto out_err; | |
1450 | } | |
1451 | ||
1452 | return 0; | |
1453 | out_err: | |
a74b4b66 | 1454 | perf_evlist__close(evlist); |
41c21a68 | 1455 | errno = -err; |
727ab04e ACM |
1456 | return err; |
1457 | } | |
35b9d88e | 1458 | |
602ad878 | 1459 | int perf_evlist__prepare_workload(struct perf_evlist *evlist, struct target *target, |
55e162ea | 1460 | const char *argv[], bool pipe_output, |
735f7e0b | 1461 | void (*exec_error)(int signo, siginfo_t *info, void *ucontext)) |
35b9d88e ACM |
1462 | { |
1463 | int child_ready_pipe[2], go_pipe[2]; | |
1464 | char bf; | |
1465 | ||
1466 | if (pipe(child_ready_pipe) < 0) { | |
1467 | perror("failed to create 'ready' pipe"); | |
1468 | return -1; | |
1469 | } | |
1470 | ||
1471 | if (pipe(go_pipe) < 0) { | |
1472 | perror("failed to create 'go' pipe"); | |
1473 | goto out_close_ready_pipe; | |
1474 | } | |
1475 | ||
1476 | evlist->workload.pid = fork(); | |
1477 | if (evlist->workload.pid < 0) { | |
1478 | perror("failed to fork"); | |
1479 | goto out_close_pipes; | |
1480 | } | |
1481 | ||
1482 | if (!evlist->workload.pid) { | |
5f1c4225 ACM |
1483 | int ret; |
1484 | ||
119fa3c9 | 1485 | if (pipe_output) |
35b9d88e ACM |
1486 | dup2(2, 1); |
1487 | ||
0817df08 DA |
1488 | signal(SIGTERM, SIG_DFL); |
1489 | ||
35b9d88e ACM |
1490 | close(child_ready_pipe[0]); |
1491 | close(go_pipe[1]); | |
1492 | fcntl(go_pipe[0], F_SETFD, FD_CLOEXEC); | |
1493 | ||
35b9d88e ACM |
1494 | /* |
1495 | * Tell the parent we're ready to go | |
1496 | */ | |
1497 | close(child_ready_pipe[1]); | |
1498 | ||
1499 | /* | |
1500 | * Wait until the parent tells us to go. | |
1501 | */ | |
5f1c4225 ACM |
1502 | ret = read(go_pipe[0], &bf, 1); |
1503 | /* | |
1504 | * The parent will ask for the execvp() to be performed by | |
1505 | * writing exactly one byte, in workload.cork_fd, usually via | |
1506 | * perf_evlist__start_workload(). | |
1507 | * | |
20f86fc1 | 1508 | * For cancelling the workload without actually running it, |
5f1c4225 ACM |
1509 | * the parent will just close workload.cork_fd, without writing |
1510 | * anything, i.e. read will return zero and we just exit() | |
1511 | * here. | |
1512 | */ | |
1513 | if (ret != 1) { | |
1514 | if (ret == -1) | |
1515 | perror("unable to read pipe"); | |
1516 | exit(ret); | |
1517 | } | |
35b9d88e ACM |
1518 | |
1519 | execvp(argv[0], (char **)argv); | |
1520 | ||
735f7e0b | 1521 | if (exec_error) { |
f33cbe72 ACM |
1522 | union sigval val; |
1523 | ||
1524 | val.sival_int = errno; | |
1525 | if (sigqueue(getppid(), SIGUSR1, val)) | |
1526 | perror(argv[0]); | |
1527 | } else | |
1528 | perror(argv[0]); | |
35b9d88e ACM |
1529 | exit(-1); |
1530 | } | |
1531 | ||
735f7e0b ACM |
1532 | if (exec_error) { |
1533 | struct sigaction act = { | |
1534 | .sa_flags = SA_SIGINFO, | |
1535 | .sa_sigaction = exec_error, | |
1536 | }; | |
1537 | sigaction(SIGUSR1, &act, NULL); | |
1538 | } | |
1539 | ||
1aaf63b1 ACM |
1540 | if (target__none(target)) { |
1541 | if (evlist->threads == NULL) { | |
1542 | fprintf(stderr, "FATAL: evlist->threads need to be set at this point (%s:%d).\n", | |
1543 | __func__, __LINE__); | |
1544 | goto out_close_pipes; | |
1545 | } | |
e13798c7 | 1546 | thread_map__set_pid(evlist->threads, 0, evlist->workload.pid); |
1aaf63b1 | 1547 | } |
35b9d88e ACM |
1548 | |
1549 | close(child_ready_pipe[1]); | |
1550 | close(go_pipe[0]); | |
1551 | /* | |
1552 | * wait for child to settle | |
1553 | */ | |
1554 | if (read(child_ready_pipe[0], &bf, 1) == -1) { | |
1555 | perror("unable to read pipe"); | |
1556 | goto out_close_pipes; | |
1557 | } | |
1558 | ||
bcf3145f | 1559 | fcntl(go_pipe[1], F_SETFD, FD_CLOEXEC); |
35b9d88e ACM |
1560 | evlist->workload.cork_fd = go_pipe[1]; |
1561 | close(child_ready_pipe[0]); | |
1562 | return 0; | |
1563 | ||
1564 | out_close_pipes: | |
1565 | close(go_pipe[0]); | |
1566 | close(go_pipe[1]); | |
1567 | out_close_ready_pipe: | |
1568 | close(child_ready_pipe[0]); | |
1569 | close(child_ready_pipe[1]); | |
1570 | return -1; | |
1571 | } | |
1572 | ||
1573 | int perf_evlist__start_workload(struct perf_evlist *evlist) | |
1574 | { | |
1575 | if (evlist->workload.cork_fd > 0) { | |
b3824404 | 1576 | char bf = 0; |
bcf3145f | 1577 | int ret; |
35b9d88e ACM |
1578 | /* |
1579 | * Remove the cork, let it rip! | |
1580 | */ | |
bcf3145f NK |
1581 | ret = write(evlist->workload.cork_fd, &bf, 1); |
1582 | if (ret < 0) | |
1583 | perror("enable to write to pipe"); | |
1584 | ||
1585 | close(evlist->workload.cork_fd); | |
1586 | return ret; | |
35b9d88e ACM |
1587 | } |
1588 | ||
1589 | return 0; | |
1590 | } | |
cb0b29e0 | 1591 | |
a3f698fe | 1592 | int perf_evlist__parse_sample(struct perf_evlist *evlist, union perf_event *event, |
0807d2d8 | 1593 | struct perf_sample *sample) |
cb0b29e0 | 1594 | { |
75562573 AH |
1595 | struct perf_evsel *evsel = perf_evlist__event2evsel(evlist, event); |
1596 | ||
1597 | if (!evsel) | |
1598 | return -EFAULT; | |
0807d2d8 | 1599 | return perf_evsel__parse_sample(evsel, event, sample); |
cb0b29e0 | 1600 | } |
78f067b3 ACM |
1601 | |
1602 | size_t perf_evlist__fprintf(struct perf_evlist *evlist, FILE *fp) | |
1603 | { | |
1604 | struct perf_evsel *evsel; | |
1605 | size_t printed = 0; | |
1606 | ||
0050f7aa | 1607 | evlist__for_each(evlist, evsel) { |
78f067b3 ACM |
1608 | printed += fprintf(fp, "%s%s", evsel->idx ? ", " : "", |
1609 | perf_evsel__name(evsel)); | |
1610 | } | |
1611 | ||
b2222139 | 1612 | return printed + fprintf(fp, "\n"); |
78f067b3 | 1613 | } |
6ef068cb | 1614 | |
a8f23d8f ACM |
1615 | int perf_evlist__strerror_open(struct perf_evlist *evlist __maybe_unused, |
1616 | int err, char *buf, size_t size) | |
1617 | { | |
1618 | int printed, value; | |
6e81c74c | 1619 | char sbuf[STRERR_BUFSIZE], *emsg = strerror_r(err, sbuf, sizeof(sbuf)); |
a8f23d8f ACM |
1620 | |
1621 | switch (err) { | |
1622 | case EACCES: | |
1623 | case EPERM: | |
1624 | printed = scnprintf(buf, size, | |
1625 | "Error:\t%s.\n" | |
1626 | "Hint:\tCheck /proc/sys/kernel/perf_event_paranoid setting.", emsg); | |
1627 | ||
1a47245d | 1628 | value = perf_event_paranoid(); |
a8f23d8f ACM |
1629 | |
1630 | printed += scnprintf(buf + printed, size - printed, "\nHint:\t"); | |
1631 | ||
1632 | if (value >= 2) { | |
1633 | printed += scnprintf(buf + printed, size - printed, | |
1634 | "For your workloads it needs to be <= 1\nHint:\t"); | |
1635 | } | |
1636 | printed += scnprintf(buf + printed, size - printed, | |
5229e366 | 1637 | "For system wide tracing it needs to be set to -1.\n"); |
a8f23d8f ACM |
1638 | |
1639 | printed += scnprintf(buf + printed, size - printed, | |
5229e366 ACM |
1640 | "Hint:\tTry: 'sudo sh -c \"echo -1 > /proc/sys/kernel/perf_event_paranoid\"'\n" |
1641 | "Hint:\tThe current value is %d.", value); | |
a8f23d8f ACM |
1642 | break; |
1643 | default: | |
1644 | scnprintf(buf, size, "%s", emsg); | |
1645 | break; | |
1646 | } | |
1647 | ||
1648 | return 0; | |
1649 | } | |
a025e4f0 | 1650 | |
956fa571 ACM |
1651 | int perf_evlist__strerror_mmap(struct perf_evlist *evlist, int err, char *buf, size_t size) |
1652 | { | |
1653 | char sbuf[STRERR_BUFSIZE], *emsg = strerror_r(err, sbuf, sizeof(sbuf)); | |
e965bea1 | 1654 | int pages_attempted = evlist->mmap_len / 1024, pages_max_per_user, printed = 0; |
956fa571 ACM |
1655 | |
1656 | switch (err) { | |
1657 | case EPERM: | |
e5d4a290 | 1658 | sysctl__read_int("kernel/perf_event_mlock_kb", &pages_max_per_user); |
e965bea1 ACM |
1659 | printed += scnprintf(buf + printed, size - printed, |
1660 | "Error:\t%s.\n" | |
956fa571 | 1661 | "Hint:\tCheck /proc/sys/kernel/perf_event_mlock_kb (%d kB) setting.\n" |
e965bea1 | 1662 | "Hint:\tTried using %zd kB.\n", |
e5d4a290 | 1663 | emsg, pages_max_per_user, pages_attempted); |
e965bea1 ACM |
1664 | |
1665 | if (pages_attempted >= pages_max_per_user) { | |
1666 | printed += scnprintf(buf + printed, size - printed, | |
1667 | "Hint:\tTry 'sudo sh -c \"echo %d > /proc/sys/kernel/perf_event_mlock_kb\"', or\n", | |
1668 | pages_max_per_user + pages_attempted); | |
1669 | } | |
1670 | ||
1671 | printed += scnprintf(buf + printed, size - printed, | |
1672 | "Hint:\tTry using a smaller -m/--mmap-pages value."); | |
956fa571 ACM |
1673 | break; |
1674 | default: | |
1675 | scnprintf(buf, size, "%s", emsg); | |
1676 | break; | |
1677 | } | |
1678 | ||
1679 | return 0; | |
1680 | } | |
1681 | ||
a025e4f0 AH |
1682 | void perf_evlist__to_front(struct perf_evlist *evlist, |
1683 | struct perf_evsel *move_evsel) | |
1684 | { | |
1685 | struct perf_evsel *evsel, *n; | |
1686 | LIST_HEAD(move); | |
1687 | ||
1688 | if (move_evsel == perf_evlist__first(evlist)) | |
1689 | return; | |
1690 | ||
0050f7aa | 1691 | evlist__for_each_safe(evlist, n, evsel) { |
a025e4f0 AH |
1692 | if (evsel->leader == move_evsel->leader) |
1693 | list_move_tail(&evsel->node, &move); | |
1694 | } | |
1695 | ||
1696 | list_splice(&move, &evlist->entries); | |
1697 | } | |
60b0896c AH |
1698 | |
1699 | void perf_evlist__set_tracking_event(struct perf_evlist *evlist, | |
1700 | struct perf_evsel *tracking_evsel) | |
1701 | { | |
1702 | struct perf_evsel *evsel; | |
1703 | ||
1704 | if (tracking_evsel->tracking) | |
1705 | return; | |
1706 | ||
1707 | evlist__for_each(evlist, evsel) { | |
1708 | if (evsel != tracking_evsel) | |
1709 | evsel->tracking = false; | |
1710 | } | |
1711 | ||
1712 | tracking_evsel->tracking = true; | |
1713 | } |