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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" |
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 ACM |
100 | list_del_init(&pos->node); |
101 | perf_evsel__delete(pos); | |
102 | } | |
103 | ||
104 | evlist->nr_entries = 0; | |
105 | } | |
106 | ||
ef1d1af2 | 107 | void perf_evlist__exit(struct perf_evlist *evlist) |
361c99a6 | 108 | { |
04662523 | 109 | zfree(&evlist->mmap); |
1b85337d | 110 | fdarray__exit(&evlist->pollfd); |
ef1d1af2 ACM |
111 | } |
112 | ||
113 | void perf_evlist__delete(struct perf_evlist *evlist) | |
114 | { | |
983874d1 | 115 | perf_evlist__munmap(evlist); |
f26e1c7c | 116 | perf_evlist__close(evlist); |
f30a79b0 | 117 | cpu_map__put(evlist->cpus); |
186fbb74 | 118 | thread_map__put(evlist->threads); |
03ad9747 ACM |
119 | evlist->cpus = NULL; |
120 | evlist->threads = NULL; | |
ef1d1af2 ACM |
121 | perf_evlist__purge(evlist); |
122 | perf_evlist__exit(evlist); | |
361c99a6 ACM |
123 | free(evlist); |
124 | } | |
125 | ||
126 | void perf_evlist__add(struct perf_evlist *evlist, struct perf_evsel *entry) | |
127 | { | |
128 | list_add_tail(&entry->node, &evlist->entries); | |
ef503831 | 129 | entry->idx = evlist->nr_entries; |
60b0896c | 130 | entry->tracking = !entry->idx; |
ef503831 | 131 | |
75562573 AH |
132 | if (!evlist->nr_entries++) |
133 | perf_evlist__set_id_pos(evlist); | |
361c99a6 ACM |
134 | } |
135 | ||
0529bc1f JO |
136 | void perf_evlist__splice_list_tail(struct perf_evlist *evlist, |
137 | struct list_head *list, | |
138 | int nr_entries) | |
50d08e47 | 139 | { |
75562573 AH |
140 | bool set_id_pos = !evlist->nr_entries; |
141 | ||
50d08e47 ACM |
142 | list_splice_tail(list, &evlist->entries); |
143 | evlist->nr_entries += nr_entries; | |
75562573 AH |
144 | if (set_id_pos) |
145 | perf_evlist__set_id_pos(evlist); | |
50d08e47 ACM |
146 | } |
147 | ||
63dab225 ACM |
148 | void __perf_evlist__set_leader(struct list_head *list) |
149 | { | |
150 | struct perf_evsel *evsel, *leader; | |
151 | ||
152 | leader = list_entry(list->next, struct perf_evsel, node); | |
97f63e4a NK |
153 | evsel = list_entry(list->prev, struct perf_evsel, node); |
154 | ||
155 | leader->nr_members = evsel->idx - leader->idx + 1; | |
63dab225 | 156 | |
0050f7aa | 157 | __evlist__for_each(list, evsel) { |
74b2133d | 158 | evsel->leader = leader; |
63dab225 ACM |
159 | } |
160 | } | |
161 | ||
162 | void perf_evlist__set_leader(struct perf_evlist *evlist) | |
6a4bb04c | 163 | { |
97f63e4a NK |
164 | if (evlist->nr_entries) { |
165 | evlist->nr_groups = evlist->nr_entries > 1 ? 1 : 0; | |
63dab225 | 166 | __perf_evlist__set_leader(&evlist->entries); |
97f63e4a | 167 | } |
6a4bb04c JO |
168 | } |
169 | ||
361c99a6 ACM |
170 | int perf_evlist__add_default(struct perf_evlist *evlist) |
171 | { | |
172 | struct perf_event_attr attr = { | |
173 | .type = PERF_TYPE_HARDWARE, | |
174 | .config = PERF_COUNT_HW_CPU_CYCLES, | |
175 | }; | |
1aed2671 JR |
176 | struct perf_evsel *evsel; |
177 | ||
178 | event_attr_init(&attr); | |
361c99a6 | 179 | |
ef503831 | 180 | evsel = perf_evsel__new(&attr); |
361c99a6 | 181 | if (evsel == NULL) |
cc2d86b0 SE |
182 | goto error; |
183 | ||
184 | /* use strdup() because free(evsel) assumes name is allocated */ | |
185 | evsel->name = strdup("cycles"); | |
186 | if (!evsel->name) | |
187 | goto error_free; | |
361c99a6 ACM |
188 | |
189 | perf_evlist__add(evlist, evsel); | |
190 | return 0; | |
cc2d86b0 SE |
191 | error_free: |
192 | perf_evsel__delete(evsel); | |
193 | error: | |
194 | return -ENOMEM; | |
361c99a6 | 195 | } |
5c581041 | 196 | |
e60fc847 ACM |
197 | static int perf_evlist__add_attrs(struct perf_evlist *evlist, |
198 | struct perf_event_attr *attrs, size_t nr_attrs) | |
50d08e47 ACM |
199 | { |
200 | struct perf_evsel *evsel, *n; | |
201 | LIST_HEAD(head); | |
202 | size_t i; | |
203 | ||
204 | for (i = 0; i < nr_attrs; i++) { | |
ef503831 | 205 | evsel = perf_evsel__new_idx(attrs + i, evlist->nr_entries + i); |
50d08e47 ACM |
206 | if (evsel == NULL) |
207 | goto out_delete_partial_list; | |
208 | list_add_tail(&evsel->node, &head); | |
209 | } | |
210 | ||
211 | perf_evlist__splice_list_tail(evlist, &head, nr_attrs); | |
212 | ||
213 | return 0; | |
214 | ||
215 | out_delete_partial_list: | |
0050f7aa | 216 | __evlist__for_each_safe(&head, n, evsel) |
50d08e47 ACM |
217 | perf_evsel__delete(evsel); |
218 | return -1; | |
219 | } | |
220 | ||
79695e1b ACM |
221 | int __perf_evlist__add_default_attrs(struct perf_evlist *evlist, |
222 | struct perf_event_attr *attrs, size_t nr_attrs) | |
223 | { | |
224 | size_t i; | |
225 | ||
226 | for (i = 0; i < nr_attrs; i++) | |
227 | event_attr_init(attrs + i); | |
228 | ||
229 | return perf_evlist__add_attrs(evlist, attrs, nr_attrs); | |
230 | } | |
231 | ||
da378962 ACM |
232 | struct perf_evsel * |
233 | perf_evlist__find_tracepoint_by_id(struct perf_evlist *evlist, int id) | |
ee29be62 ACM |
234 | { |
235 | struct perf_evsel *evsel; | |
236 | ||
0050f7aa | 237 | evlist__for_each(evlist, evsel) { |
ee29be62 ACM |
238 | if (evsel->attr.type == PERF_TYPE_TRACEPOINT && |
239 | (int)evsel->attr.config == id) | |
240 | return evsel; | |
241 | } | |
242 | ||
243 | return NULL; | |
244 | } | |
245 | ||
a2f2804a DA |
246 | struct perf_evsel * |
247 | perf_evlist__find_tracepoint_by_name(struct perf_evlist *evlist, | |
248 | const char *name) | |
249 | { | |
250 | struct perf_evsel *evsel; | |
251 | ||
0050f7aa | 252 | evlist__for_each(evlist, evsel) { |
a2f2804a DA |
253 | if ((evsel->attr.type == PERF_TYPE_TRACEPOINT) && |
254 | (strcmp(evsel->name, name) == 0)) | |
255 | return evsel; | |
256 | } | |
257 | ||
258 | return NULL; | |
259 | } | |
260 | ||
39876e7d ACM |
261 | int perf_evlist__add_newtp(struct perf_evlist *evlist, |
262 | const char *sys, const char *name, void *handler) | |
263 | { | |
ef503831 | 264 | struct perf_evsel *evsel = perf_evsel__newtp(sys, name); |
39876e7d | 265 | |
39876e7d ACM |
266 | if (evsel == NULL) |
267 | return -1; | |
268 | ||
744a9719 | 269 | evsel->handler = handler; |
39876e7d ACM |
270 | perf_evlist__add(evlist, evsel); |
271 | return 0; | |
272 | } | |
273 | ||
bf8e8f4b AH |
274 | static int perf_evlist__nr_threads(struct perf_evlist *evlist, |
275 | struct perf_evsel *evsel) | |
276 | { | |
277 | if (evsel->system_wide) | |
278 | return 1; | |
279 | else | |
280 | return thread_map__nr(evlist->threads); | |
281 | } | |
282 | ||
4152ab37 ACM |
283 | void perf_evlist__disable(struct perf_evlist *evlist) |
284 | { | |
285 | int cpu, thread; | |
286 | struct perf_evsel *pos; | |
b3a319d5 | 287 | int nr_cpus = cpu_map__nr(evlist->cpus); |
bf8e8f4b | 288 | int nr_threads; |
4152ab37 | 289 | |
b3a319d5 | 290 | for (cpu = 0; cpu < nr_cpus; cpu++) { |
0050f7aa | 291 | evlist__for_each(evlist, pos) { |
395c3070 | 292 | if (!perf_evsel__is_group_leader(pos) || !pos->fd) |
3fe4430d | 293 | continue; |
bf8e8f4b | 294 | nr_threads = perf_evlist__nr_threads(evlist, pos); |
b3a319d5 | 295 | for (thread = 0; thread < nr_threads; thread++) |
55da8005 NK |
296 | ioctl(FD(pos, cpu, thread), |
297 | PERF_EVENT_IOC_DISABLE, 0); | |
4152ab37 ACM |
298 | } |
299 | } | |
2b56bcfb ACM |
300 | |
301 | evlist->enabled = false; | |
4152ab37 ACM |
302 | } |
303 | ||
764e16a3 DA |
304 | void perf_evlist__enable(struct perf_evlist *evlist) |
305 | { | |
306 | int cpu, thread; | |
307 | struct perf_evsel *pos; | |
b3a319d5 | 308 | int nr_cpus = cpu_map__nr(evlist->cpus); |
bf8e8f4b | 309 | int nr_threads; |
764e16a3 | 310 | |
b3a319d5 | 311 | for (cpu = 0; cpu < nr_cpus; cpu++) { |
0050f7aa | 312 | evlist__for_each(evlist, pos) { |
395c3070 | 313 | if (!perf_evsel__is_group_leader(pos) || !pos->fd) |
3fe4430d | 314 | continue; |
bf8e8f4b | 315 | nr_threads = perf_evlist__nr_threads(evlist, pos); |
b3a319d5 | 316 | for (thread = 0; thread < nr_threads; thread++) |
55da8005 NK |
317 | ioctl(FD(pos, cpu, thread), |
318 | PERF_EVENT_IOC_ENABLE, 0); | |
764e16a3 DA |
319 | } |
320 | } | |
2b56bcfb ACM |
321 | |
322 | evlist->enabled = true; | |
323 | } | |
324 | ||
325 | void perf_evlist__toggle_enable(struct perf_evlist *evlist) | |
326 | { | |
327 | (evlist->enabled ? perf_evlist__disable : perf_evlist__enable)(evlist); | |
764e16a3 DA |
328 | } |
329 | ||
395c3070 AH |
330 | int perf_evlist__disable_event(struct perf_evlist *evlist, |
331 | struct perf_evsel *evsel) | |
332 | { | |
333 | int cpu, thread, err; | |
bf8e8f4b AH |
334 | int nr_cpus = cpu_map__nr(evlist->cpus); |
335 | int nr_threads = perf_evlist__nr_threads(evlist, evsel); | |
395c3070 AH |
336 | |
337 | if (!evsel->fd) | |
338 | return 0; | |
339 | ||
bf8e8f4b AH |
340 | for (cpu = 0; cpu < nr_cpus; cpu++) { |
341 | for (thread = 0; thread < nr_threads; thread++) { | |
395c3070 AH |
342 | err = ioctl(FD(evsel, cpu, thread), |
343 | PERF_EVENT_IOC_DISABLE, 0); | |
344 | if (err) | |
345 | return err; | |
346 | } | |
347 | } | |
348 | return 0; | |
349 | } | |
350 | ||
351 | int perf_evlist__enable_event(struct perf_evlist *evlist, | |
352 | struct perf_evsel *evsel) | |
353 | { | |
354 | int cpu, thread, err; | |
bf8e8f4b AH |
355 | int nr_cpus = cpu_map__nr(evlist->cpus); |
356 | int nr_threads = perf_evlist__nr_threads(evlist, evsel); | |
395c3070 AH |
357 | |
358 | if (!evsel->fd) | |
359 | return -EINVAL; | |
360 | ||
bf8e8f4b AH |
361 | for (cpu = 0; cpu < nr_cpus; cpu++) { |
362 | for (thread = 0; thread < nr_threads; thread++) { | |
395c3070 AH |
363 | err = ioctl(FD(evsel, cpu, thread), |
364 | PERF_EVENT_IOC_ENABLE, 0); | |
365 | if (err) | |
366 | return err; | |
367 | } | |
368 | } | |
369 | return 0; | |
370 | } | |
371 | ||
1c65056c AH |
372 | static int perf_evlist__enable_event_cpu(struct perf_evlist *evlist, |
373 | struct perf_evsel *evsel, int cpu) | |
374 | { | |
375 | int thread, err; | |
376 | int nr_threads = perf_evlist__nr_threads(evlist, evsel); | |
377 | ||
378 | if (!evsel->fd) | |
379 | return -EINVAL; | |
380 | ||
381 | for (thread = 0; thread < nr_threads; thread++) { | |
382 | err = ioctl(FD(evsel, cpu, thread), | |
383 | PERF_EVENT_IOC_ENABLE, 0); | |
384 | if (err) | |
385 | return err; | |
386 | } | |
387 | return 0; | |
388 | } | |
389 | ||
390 | static int perf_evlist__enable_event_thread(struct perf_evlist *evlist, | |
391 | struct perf_evsel *evsel, | |
392 | int thread) | |
393 | { | |
394 | int cpu, err; | |
395 | int nr_cpus = cpu_map__nr(evlist->cpus); | |
396 | ||
397 | if (!evsel->fd) | |
398 | return -EINVAL; | |
399 | ||
400 | for (cpu = 0; cpu < nr_cpus; cpu++) { | |
401 | err = ioctl(FD(evsel, cpu, thread), PERF_EVENT_IOC_ENABLE, 0); | |
402 | if (err) | |
403 | return err; | |
404 | } | |
405 | return 0; | |
406 | } | |
407 | ||
408 | int perf_evlist__enable_event_idx(struct perf_evlist *evlist, | |
409 | struct perf_evsel *evsel, int idx) | |
410 | { | |
411 | bool per_cpu_mmaps = !cpu_map__empty(evlist->cpus); | |
412 | ||
413 | if (per_cpu_mmaps) | |
414 | return perf_evlist__enable_event_cpu(evlist, evsel, idx); | |
415 | else | |
416 | return perf_evlist__enable_event_thread(evlist, evsel, idx); | |
417 | } | |
418 | ||
ad6765dd | 419 | int perf_evlist__alloc_pollfd(struct perf_evlist *evlist) |
5c581041 | 420 | { |
b3a319d5 NK |
421 | int nr_cpus = cpu_map__nr(evlist->cpus); |
422 | int nr_threads = thread_map__nr(evlist->threads); | |
bf8e8f4b AH |
423 | int nfds = 0; |
424 | struct perf_evsel *evsel; | |
425 | ||
cba9b847 | 426 | evlist__for_each(evlist, evsel) { |
bf8e8f4b AH |
427 | if (evsel->system_wide) |
428 | nfds += nr_cpus; | |
429 | else | |
430 | nfds += nr_cpus * nr_threads; | |
431 | } | |
432 | ||
1b85337d ACM |
433 | if (fdarray__available_entries(&evlist->pollfd) < nfds && |
434 | fdarray__grow(&evlist->pollfd, nfds) < 0) | |
ad6765dd ACM |
435 | return -ENOMEM; |
436 | ||
437 | return 0; | |
5c581041 | 438 | } |
70082dd9 | 439 | |
e4b356b5 ACM |
440 | static int __perf_evlist__add_pollfd(struct perf_evlist *evlist, int fd, int idx) |
441 | { | |
442 | int pos = fdarray__add(&evlist->pollfd, fd, POLLIN | POLLERR | POLLHUP); | |
443 | /* | |
444 | * Save the idx so that when we filter out fds POLLHUP'ed we can | |
445 | * close the associated evlist->mmap[] entry. | |
446 | */ | |
447 | if (pos >= 0) { | |
448 | evlist->pollfd.priv[pos].idx = idx; | |
449 | ||
450 | fcntl(fd, F_SETFL, O_NONBLOCK); | |
451 | } | |
452 | ||
453 | return pos; | |
454 | } | |
455 | ||
ad6765dd | 456 | int perf_evlist__add_pollfd(struct perf_evlist *evlist, int fd) |
70082dd9 | 457 | { |
e4b356b5 ACM |
458 | return __perf_evlist__add_pollfd(evlist, fd, -1); |
459 | } | |
460 | ||
461 | static void perf_evlist__munmap_filtered(struct fdarray *fda, int fd) | |
462 | { | |
463 | struct perf_evlist *evlist = container_of(fda, struct perf_evlist, pollfd); | |
1b85337d | 464 | |
e4b356b5 | 465 | perf_evlist__mmap_put(evlist, fda->priv[fd].idx); |
70082dd9 | 466 | } |
70db7533 | 467 | |
1ddec7f0 ACM |
468 | int perf_evlist__filter_pollfd(struct perf_evlist *evlist, short revents_and_mask) |
469 | { | |
e4b356b5 ACM |
470 | return fdarray__filter(&evlist->pollfd, revents_and_mask, |
471 | perf_evlist__munmap_filtered); | |
1ddec7f0 ACM |
472 | } |
473 | ||
f66a889d ACM |
474 | int perf_evlist__poll(struct perf_evlist *evlist, int timeout) |
475 | { | |
1b85337d | 476 | return fdarray__poll(&evlist->pollfd, timeout); |
f66a889d ACM |
477 | } |
478 | ||
a91e5431 ACM |
479 | static void perf_evlist__id_hash(struct perf_evlist *evlist, |
480 | struct perf_evsel *evsel, | |
481 | int cpu, int thread, u64 id) | |
3d3b5e95 ACM |
482 | { |
483 | int hash; | |
484 | struct perf_sample_id *sid = SID(evsel, cpu, thread); | |
485 | ||
486 | sid->id = id; | |
487 | sid->evsel = evsel; | |
488 | hash = hash_64(sid->id, PERF_EVLIST__HLIST_BITS); | |
489 | hlist_add_head(&sid->node, &evlist->heads[hash]); | |
490 | } | |
491 | ||
a91e5431 ACM |
492 | void perf_evlist__id_add(struct perf_evlist *evlist, struct perf_evsel *evsel, |
493 | int cpu, int thread, u64 id) | |
494 | { | |
495 | perf_evlist__id_hash(evlist, evsel, cpu, thread, id); | |
496 | evsel->id[evsel->ids++] = id; | |
497 | } | |
498 | ||
499 | static int perf_evlist__id_add_fd(struct perf_evlist *evlist, | |
500 | struct perf_evsel *evsel, | |
501 | int cpu, int thread, int fd) | |
f8a95309 | 502 | { |
f8a95309 | 503 | u64 read_data[4] = { 0, }; |
3d3b5e95 | 504 | int id_idx = 1; /* The first entry is the counter value */ |
e2b5abe0 JO |
505 | u64 id; |
506 | int ret; | |
507 | ||
508 | ret = ioctl(fd, PERF_EVENT_IOC_ID, &id); | |
509 | if (!ret) | |
510 | goto add; | |
511 | ||
512 | if (errno != ENOTTY) | |
513 | return -1; | |
514 | ||
515 | /* Legacy way to get event id.. All hail to old kernels! */ | |
f8a95309 | 516 | |
c4861afe JO |
517 | /* |
518 | * This way does not work with group format read, so bail | |
519 | * out in that case. | |
520 | */ | |
521 | if (perf_evlist__read_format(evlist) & PERF_FORMAT_GROUP) | |
522 | return -1; | |
523 | ||
f8a95309 ACM |
524 | if (!(evsel->attr.read_format & PERF_FORMAT_ID) || |
525 | read(fd, &read_data, sizeof(read_data)) == -1) | |
526 | return -1; | |
527 | ||
528 | if (evsel->attr.read_format & PERF_FORMAT_TOTAL_TIME_ENABLED) | |
529 | ++id_idx; | |
530 | if (evsel->attr.read_format & PERF_FORMAT_TOTAL_TIME_RUNNING) | |
531 | ++id_idx; | |
532 | ||
e2b5abe0 JO |
533 | id = read_data[id_idx]; |
534 | ||
535 | add: | |
536 | perf_evlist__id_add(evlist, evsel, cpu, thread, id); | |
f8a95309 ACM |
537 | return 0; |
538 | } | |
539 | ||
3c659eed AH |
540 | static void perf_evlist__set_sid_idx(struct perf_evlist *evlist, |
541 | struct perf_evsel *evsel, int idx, int cpu, | |
542 | int thread) | |
543 | { | |
544 | struct perf_sample_id *sid = SID(evsel, cpu, thread); | |
545 | sid->idx = idx; | |
546 | if (evlist->cpus && cpu >= 0) | |
547 | sid->cpu = evlist->cpus->map[cpu]; | |
548 | else | |
549 | sid->cpu = -1; | |
550 | if (!evsel->system_wide && evlist->threads && thread >= 0) | |
e13798c7 | 551 | sid->tid = thread_map__pid(evlist->threads, thread); |
3c659eed AH |
552 | else |
553 | sid->tid = -1; | |
554 | } | |
555 | ||
932a3594 | 556 | struct perf_sample_id *perf_evlist__id2sid(struct perf_evlist *evlist, u64 id) |
70db7533 ACM |
557 | { |
558 | struct hlist_head *head; | |
70db7533 ACM |
559 | struct perf_sample_id *sid; |
560 | int hash; | |
561 | ||
70db7533 ACM |
562 | hash = hash_64(id, PERF_EVLIST__HLIST_BITS); |
563 | head = &evlist->heads[hash]; | |
564 | ||
b67bfe0d | 565 | hlist_for_each_entry(sid, head, node) |
70db7533 | 566 | if (sid->id == id) |
932a3594 JO |
567 | return sid; |
568 | ||
569 | return NULL; | |
570 | } | |
571 | ||
572 | struct perf_evsel *perf_evlist__id2evsel(struct perf_evlist *evlist, u64 id) | |
573 | { | |
574 | struct perf_sample_id *sid; | |
575 | ||
05169df5 | 576 | if (evlist->nr_entries == 1 || !id) |
932a3594 JO |
577 | return perf_evlist__first(evlist); |
578 | ||
579 | sid = perf_evlist__id2sid(evlist, id); | |
580 | if (sid) | |
581 | return sid->evsel; | |
30e68bcc NK |
582 | |
583 | if (!perf_evlist__sample_id_all(evlist)) | |
0c21f736 | 584 | return perf_evlist__first(evlist); |
30e68bcc | 585 | |
70db7533 ACM |
586 | return NULL; |
587 | } | |
04391deb | 588 | |
75562573 AH |
589 | static int perf_evlist__event2id(struct perf_evlist *evlist, |
590 | union perf_event *event, u64 *id) | |
591 | { | |
592 | const u64 *array = event->sample.array; | |
593 | ssize_t n; | |
594 | ||
595 | n = (event->header.size - sizeof(event->header)) >> 3; | |
596 | ||
597 | if (event->header.type == PERF_RECORD_SAMPLE) { | |
598 | if (evlist->id_pos >= n) | |
599 | return -1; | |
600 | *id = array[evlist->id_pos]; | |
601 | } else { | |
602 | if (evlist->is_pos > n) | |
603 | return -1; | |
604 | n -= evlist->is_pos; | |
605 | *id = array[n]; | |
606 | } | |
607 | return 0; | |
608 | } | |
609 | ||
610 | static struct perf_evsel *perf_evlist__event2evsel(struct perf_evlist *evlist, | |
611 | union perf_event *event) | |
612 | { | |
98be6966 | 613 | struct perf_evsel *first = perf_evlist__first(evlist); |
75562573 AH |
614 | struct hlist_head *head; |
615 | struct perf_sample_id *sid; | |
616 | int hash; | |
617 | u64 id; | |
618 | ||
619 | if (evlist->nr_entries == 1) | |
98be6966 AH |
620 | return first; |
621 | ||
622 | if (!first->attr.sample_id_all && | |
623 | event->header.type != PERF_RECORD_SAMPLE) | |
624 | return first; | |
75562573 AH |
625 | |
626 | if (perf_evlist__event2id(evlist, event, &id)) | |
627 | return NULL; | |
628 | ||
629 | /* Synthesized events have an id of zero */ | |
630 | if (!id) | |
98be6966 | 631 | return first; |
75562573 AH |
632 | |
633 | hash = hash_64(id, PERF_EVLIST__HLIST_BITS); | |
634 | head = &evlist->heads[hash]; | |
635 | ||
636 | hlist_for_each_entry(sid, head, node) { | |
637 | if (sid->id == id) | |
638 | return sid->evsel; | |
639 | } | |
640 | return NULL; | |
641 | } | |
642 | ||
aece948f | 643 | union perf_event *perf_evlist__mmap_read(struct perf_evlist *evlist, int idx) |
04391deb | 644 | { |
aece948f | 645 | struct perf_mmap *md = &evlist->mmap[idx]; |
7951722d | 646 | u64 head; |
7b8283b5 | 647 | u64 old = md->prev; |
04391deb | 648 | unsigned char *data = md->base + page_size; |
8115d60c | 649 | union perf_event *event = NULL; |
04391deb | 650 | |
7951722d SB |
651 | /* |
652 | * Check if event was unmapped due to a POLLHUP/POLLERR. | |
653 | */ | |
654 | if (!atomic_read(&md->refcnt)) | |
655 | return NULL; | |
656 | ||
657 | head = perf_mmap__read_head(md); | |
7bb41152 | 658 | if (evlist->overwrite) { |
04391deb | 659 | /* |
7bb41152 ACM |
660 | * If we're further behind than half the buffer, there's a chance |
661 | * the writer will bite our tail and mess up the samples under us. | |
662 | * | |
663 | * If we somehow ended up ahead of the head, we got messed up. | |
664 | * | |
665 | * In either case, truncate and restart at head. | |
04391deb | 666 | */ |
7bb41152 ACM |
667 | int diff = head - old; |
668 | if (diff > md->mask / 2 || diff < 0) { | |
669 | fprintf(stderr, "WARNING: failed to keep up with mmap data.\n"); | |
670 | ||
671 | /* | |
672 | * head points to a known good entry, start there. | |
673 | */ | |
674 | old = head; | |
675 | } | |
04391deb ACM |
676 | } |
677 | ||
678 | if (old != head) { | |
679 | size_t size; | |
680 | ||
8115d60c | 681 | event = (union perf_event *)&data[old & md->mask]; |
04391deb ACM |
682 | size = event->header.size; |
683 | ||
684 | /* | |
685 | * Event straddles the mmap boundary -- header should always | |
686 | * be inside due to u64 alignment of output. | |
687 | */ | |
688 | if ((old & md->mask) + size != ((old + size) & md->mask)) { | |
689 | unsigned int offset = old; | |
690 | unsigned int len = min(sizeof(*event), size), cpy; | |
a65cb4b9 | 691 | void *dst = md->event_copy; |
04391deb ACM |
692 | |
693 | do { | |
694 | cpy = min(md->mask + 1 - (offset & md->mask), len); | |
695 | memcpy(dst, &data[offset & md->mask], cpy); | |
696 | offset += cpy; | |
697 | dst += cpy; | |
698 | len -= cpy; | |
699 | } while (len); | |
700 | ||
a65cb4b9 | 701 | event = (union perf_event *) md->event_copy; |
04391deb ACM |
702 | } |
703 | ||
704 | old += size; | |
705 | } | |
706 | ||
707 | md->prev = old; | |
7bb41152 | 708 | |
04391deb ACM |
709 | return event; |
710 | } | |
f8a95309 | 711 | |
82396986 ACM |
712 | static bool perf_mmap__empty(struct perf_mmap *md) |
713 | { | |
b72e74d1 | 714 | return perf_mmap__read_head(md) == md->prev && !md->auxtrace_mmap.base; |
82396986 ACM |
715 | } |
716 | ||
717 | static void perf_evlist__mmap_get(struct perf_evlist *evlist, int idx) | |
718 | { | |
7143849a | 719 | atomic_inc(&evlist->mmap[idx].refcnt); |
82396986 ACM |
720 | } |
721 | ||
722 | static void perf_evlist__mmap_put(struct perf_evlist *evlist, int idx) | |
723 | { | |
7143849a | 724 | BUG_ON(atomic_read(&evlist->mmap[idx].refcnt) == 0); |
82396986 | 725 | |
7143849a | 726 | if (atomic_dec_and_test(&evlist->mmap[idx].refcnt)) |
82396986 ACM |
727 | __perf_evlist__munmap(evlist, idx); |
728 | } | |
729 | ||
8e50d384 ZZ |
730 | void perf_evlist__mmap_consume(struct perf_evlist *evlist, int idx) |
731 | { | |
82396986 ACM |
732 | struct perf_mmap *md = &evlist->mmap[idx]; |
733 | ||
8e50d384 | 734 | if (!evlist->overwrite) { |
7b8283b5 | 735 | u64 old = md->prev; |
8e50d384 ZZ |
736 | |
737 | perf_mmap__write_tail(md, old); | |
738 | } | |
82396986 | 739 | |
7143849a | 740 | if (atomic_read(&md->refcnt) == 1 && perf_mmap__empty(md)) |
82396986 | 741 | perf_evlist__mmap_put(evlist, idx); |
8e50d384 ZZ |
742 | } |
743 | ||
718c602d AH |
744 | int __weak auxtrace_mmap__mmap(struct auxtrace_mmap *mm __maybe_unused, |
745 | struct auxtrace_mmap_params *mp __maybe_unused, | |
746 | void *userpg __maybe_unused, | |
747 | int fd __maybe_unused) | |
748 | { | |
749 | return 0; | |
750 | } | |
751 | ||
752 | void __weak auxtrace_mmap__munmap(struct auxtrace_mmap *mm __maybe_unused) | |
753 | { | |
754 | } | |
755 | ||
756 | void __weak auxtrace_mmap_params__init( | |
757 | struct auxtrace_mmap_params *mp __maybe_unused, | |
758 | off_t auxtrace_offset __maybe_unused, | |
759 | unsigned int auxtrace_pages __maybe_unused, | |
760 | bool auxtrace_overwrite __maybe_unused) | |
761 | { | |
762 | } | |
763 | ||
764 | void __weak auxtrace_mmap_params__set_idx( | |
765 | struct auxtrace_mmap_params *mp __maybe_unused, | |
766 | struct perf_evlist *evlist __maybe_unused, | |
767 | int idx __maybe_unused, | |
768 | bool per_cpu __maybe_unused) | |
769 | { | |
770 | } | |
771 | ||
93edcbd9 AH |
772 | static void __perf_evlist__munmap(struct perf_evlist *evlist, int idx) |
773 | { | |
774 | if (evlist->mmap[idx].base != NULL) { | |
775 | munmap(evlist->mmap[idx].base, evlist->mmap_len); | |
776 | evlist->mmap[idx].base = NULL; | |
7143849a | 777 | atomic_set(&evlist->mmap[idx].refcnt, 0); |
93edcbd9 | 778 | } |
718c602d | 779 | auxtrace_mmap__munmap(&evlist->mmap[idx].auxtrace_mmap); |
93edcbd9 AH |
780 | } |
781 | ||
7e2ed097 | 782 | void perf_evlist__munmap(struct perf_evlist *evlist) |
f8a95309 | 783 | { |
aece948f | 784 | int i; |
f8a95309 | 785 | |
983874d1 ACM |
786 | if (evlist->mmap == NULL) |
787 | return; | |
788 | ||
93edcbd9 AH |
789 | for (i = 0; i < evlist->nr_mmaps; i++) |
790 | __perf_evlist__munmap(evlist, i); | |
aece948f | 791 | |
04662523 | 792 | zfree(&evlist->mmap); |
f8a95309 ACM |
793 | } |
794 | ||
806fb630 | 795 | static int perf_evlist__alloc_mmap(struct perf_evlist *evlist) |
f8a95309 | 796 | { |
a14bb7a6 | 797 | evlist->nr_mmaps = cpu_map__nr(evlist->cpus); |
ec1e7e43 | 798 | if (cpu_map__empty(evlist->cpus)) |
b3a319d5 | 799 | evlist->nr_mmaps = thread_map__nr(evlist->threads); |
aece948f | 800 | evlist->mmap = zalloc(evlist->nr_mmaps * sizeof(struct perf_mmap)); |
f8a95309 ACM |
801 | return evlist->mmap != NULL ? 0 : -ENOMEM; |
802 | } | |
803 | ||
a8a8f3eb AH |
804 | struct mmap_params { |
805 | int prot; | |
806 | int mask; | |
718c602d | 807 | struct auxtrace_mmap_params auxtrace_mp; |
a8a8f3eb AH |
808 | }; |
809 | ||
810 | static int __perf_evlist__mmap(struct perf_evlist *evlist, int idx, | |
811 | struct mmap_params *mp, int fd) | |
f8a95309 | 812 | { |
82396986 ACM |
813 | /* |
814 | * The last one will be done at perf_evlist__mmap_consume(), so that we | |
815 | * make sure we don't prevent tools from consuming every last event in | |
816 | * the ring buffer. | |
817 | * | |
818 | * I.e. we can get the POLLHUP meaning that the fd doesn't exist | |
819 | * anymore, but the last events for it are still in the ring buffer, | |
820 | * waiting to be consumed. | |
821 | * | |
822 | * Tools can chose to ignore this at their own discretion, but the | |
823 | * evlist layer can't just drop it when filtering events in | |
824 | * perf_evlist__filter_pollfd(). | |
825 | */ | |
7143849a | 826 | atomic_set(&evlist->mmap[idx].refcnt, 2); |
aece948f | 827 | evlist->mmap[idx].prev = 0; |
a8a8f3eb AH |
828 | evlist->mmap[idx].mask = mp->mask; |
829 | evlist->mmap[idx].base = mmap(NULL, evlist->mmap_len, mp->prot, | |
f8a95309 | 830 | MAP_SHARED, fd, 0); |
301b195d | 831 | if (evlist->mmap[idx].base == MAP_FAILED) { |
02635965 AH |
832 | pr_debug2("failed to mmap perf event ring buffer, error %d\n", |
833 | errno); | |
301b195d | 834 | evlist->mmap[idx].base = NULL; |
f8a95309 | 835 | return -1; |
301b195d | 836 | } |
ad6765dd | 837 | |
718c602d AH |
838 | if (auxtrace_mmap__mmap(&evlist->mmap[idx].auxtrace_mmap, |
839 | &mp->auxtrace_mp, evlist->mmap[idx].base, fd)) | |
840 | return -1; | |
841 | ||
f8a95309 ACM |
842 | return 0; |
843 | } | |
844 | ||
04e21314 | 845 | static int perf_evlist__mmap_per_evsel(struct perf_evlist *evlist, int idx, |
a8a8f3eb AH |
846 | struct mmap_params *mp, int cpu, |
847 | int thread, int *output) | |
aece948f ACM |
848 | { |
849 | struct perf_evsel *evsel; | |
04e21314 | 850 | |
0050f7aa | 851 | evlist__for_each(evlist, evsel) { |
bf8e8f4b AH |
852 | int fd; |
853 | ||
854 | if (evsel->system_wide && thread) | |
855 | continue; | |
856 | ||
857 | fd = FD(evsel, cpu, thread); | |
04e21314 AH |
858 | |
859 | if (*output == -1) { | |
860 | *output = fd; | |
a8a8f3eb | 861 | if (__perf_evlist__mmap(evlist, idx, mp, *output) < 0) |
04e21314 AH |
862 | return -1; |
863 | } else { | |
864 | if (ioctl(fd, PERF_EVENT_IOC_SET_OUTPUT, *output) != 0) | |
865 | return -1; | |
82396986 ACM |
866 | |
867 | perf_evlist__mmap_get(evlist, idx); | |
04e21314 AH |
868 | } |
869 | ||
f90d194a AH |
870 | /* |
871 | * The system_wide flag causes a selected event to be opened | |
872 | * always without a pid. Consequently it will never get a | |
873 | * POLLHUP, but it is used for tracking in combination with | |
874 | * other events, so it should not need to be polled anyway. | |
875 | * Therefore don't add it for polling. | |
876 | */ | |
877 | if (!evsel->system_wide && | |
878 | __perf_evlist__add_pollfd(evlist, fd, idx) < 0) { | |
82396986 | 879 | perf_evlist__mmap_put(evlist, idx); |
ad6765dd | 880 | return -1; |
82396986 | 881 | } |
033fa713 | 882 | |
3c659eed AH |
883 | if (evsel->attr.read_format & PERF_FORMAT_ID) { |
884 | if (perf_evlist__id_add_fd(evlist, evsel, cpu, thread, | |
885 | fd) < 0) | |
886 | return -1; | |
887 | perf_evlist__set_sid_idx(evlist, evsel, idx, cpu, | |
888 | thread); | |
889 | } | |
04e21314 AH |
890 | } |
891 | ||
892 | return 0; | |
893 | } | |
894 | ||
a8a8f3eb AH |
895 | static int perf_evlist__mmap_per_cpu(struct perf_evlist *evlist, |
896 | struct mmap_params *mp) | |
04e21314 | 897 | { |
aece948f | 898 | int cpu, thread; |
b3a319d5 NK |
899 | int nr_cpus = cpu_map__nr(evlist->cpus); |
900 | int nr_threads = thread_map__nr(evlist->threads); | |
aece948f | 901 | |
e3e1a54f | 902 | pr_debug2("perf event ring buffer mmapped per cpu\n"); |
b3a319d5 | 903 | for (cpu = 0; cpu < nr_cpus; cpu++) { |
aece948f ACM |
904 | int output = -1; |
905 | ||
718c602d AH |
906 | auxtrace_mmap_params__set_idx(&mp->auxtrace_mp, evlist, cpu, |
907 | true); | |
908 | ||
b3a319d5 | 909 | for (thread = 0; thread < nr_threads; thread++) { |
a8a8f3eb AH |
910 | if (perf_evlist__mmap_per_evsel(evlist, cpu, mp, cpu, |
911 | thread, &output)) | |
04e21314 | 912 | goto out_unmap; |
aece948f ACM |
913 | } |
914 | } | |
915 | ||
916 | return 0; | |
917 | ||
918 | out_unmap: | |
93edcbd9 AH |
919 | for (cpu = 0; cpu < nr_cpus; cpu++) |
920 | __perf_evlist__munmap(evlist, cpu); | |
aece948f ACM |
921 | return -1; |
922 | } | |
923 | ||
a8a8f3eb AH |
924 | static int perf_evlist__mmap_per_thread(struct perf_evlist *evlist, |
925 | struct mmap_params *mp) | |
aece948f | 926 | { |
aece948f | 927 | int thread; |
b3a319d5 | 928 | int nr_threads = thread_map__nr(evlist->threads); |
aece948f | 929 | |
e3e1a54f | 930 | pr_debug2("perf event ring buffer mmapped per thread\n"); |
b3a319d5 | 931 | for (thread = 0; thread < nr_threads; thread++) { |
aece948f ACM |
932 | int output = -1; |
933 | ||
718c602d AH |
934 | auxtrace_mmap_params__set_idx(&mp->auxtrace_mp, evlist, thread, |
935 | false); | |
936 | ||
a8a8f3eb AH |
937 | if (perf_evlist__mmap_per_evsel(evlist, thread, mp, 0, thread, |
938 | &output)) | |
04e21314 | 939 | goto out_unmap; |
aece948f ACM |
940 | } |
941 | ||
942 | return 0; | |
943 | ||
944 | out_unmap: | |
93edcbd9 AH |
945 | for (thread = 0; thread < nr_threads; thread++) |
946 | __perf_evlist__munmap(evlist, thread); | |
aece948f ACM |
947 | return -1; |
948 | } | |
949 | ||
994a1f78 JO |
950 | static size_t perf_evlist__mmap_size(unsigned long pages) |
951 | { | |
8185e881 ACM |
952 | if (pages == UINT_MAX) { |
953 | int max; | |
954 | ||
955 | if (sysctl__read_int("kernel/perf_event_mlock_kb", &max) < 0) { | |
956 | /* | |
957 | * Pick a once upon a time good value, i.e. things look | |
958 | * strange since we can't read a sysctl value, but lets not | |
959 | * die yet... | |
960 | */ | |
961 | max = 512; | |
962 | } else { | |
963 | max -= (page_size / 1024); | |
964 | } | |
965 | ||
966 | pages = (max * 1024) / page_size; | |
1be300f4 ACM |
967 | if (!is_power_of_2(pages)) |
968 | pages = rounddown_pow_of_two(pages); | |
8185e881 | 969 | } else if (!is_power_of_2(pages)) |
994a1f78 JO |
970 | return 0; |
971 | ||
972 | return (pages + 1) * page_size; | |
973 | } | |
974 | ||
33c2dcfd DA |
975 | static long parse_pages_arg(const char *str, unsigned long min, |
976 | unsigned long max) | |
994a1f78 | 977 | { |
2fbe4abe | 978 | unsigned long pages, val; |
27050f53 JO |
979 | static struct parse_tag tags[] = { |
980 | { .tag = 'B', .mult = 1 }, | |
981 | { .tag = 'K', .mult = 1 << 10 }, | |
982 | { .tag = 'M', .mult = 1 << 20 }, | |
983 | { .tag = 'G', .mult = 1 << 30 }, | |
984 | { .tag = 0 }, | |
985 | }; | |
994a1f78 | 986 | |
8973504b | 987 | if (str == NULL) |
33c2dcfd | 988 | return -EINVAL; |
8973504b | 989 | |
27050f53 | 990 | val = parse_tag_value(str, tags); |
2fbe4abe | 991 | if (val != (unsigned long) -1) { |
27050f53 JO |
992 | /* we got file size value */ |
993 | pages = PERF_ALIGN(val, page_size) / page_size; | |
27050f53 JO |
994 | } else { |
995 | /* we got pages count value */ | |
996 | char *eptr; | |
997 | pages = strtoul(str, &eptr, 10); | |
33c2dcfd DA |
998 | if (*eptr != '\0') |
999 | return -EINVAL; | |
994a1f78 JO |
1000 | } |
1001 | ||
2bcab6c1 | 1002 | if (pages == 0 && min == 0) { |
33c2dcfd | 1003 | /* leave number of pages at 0 */ |
1dbfa938 | 1004 | } else if (!is_power_of_2(pages)) { |
33c2dcfd | 1005 | /* round pages up to next power of 2 */ |
91529834 | 1006 | pages = roundup_pow_of_two(pages); |
1dbfa938 AH |
1007 | if (!pages) |
1008 | return -EINVAL; | |
9639837e DA |
1009 | pr_info("rounding mmap pages size to %lu bytes (%lu pages)\n", |
1010 | pages * page_size, pages); | |
2fbe4abe AH |
1011 | } |
1012 | ||
33c2dcfd DA |
1013 | if (pages > max) |
1014 | return -EINVAL; | |
1015 | ||
1016 | return pages; | |
1017 | } | |
1018 | ||
e9db1310 | 1019 | int __perf_evlist__parse_mmap_pages(unsigned int *mmap_pages, const char *str) |
33c2dcfd | 1020 | { |
33c2dcfd DA |
1021 | unsigned long max = UINT_MAX; |
1022 | long pages; | |
1023 | ||
f5ae9c42 | 1024 | if (max > SIZE_MAX / page_size) |
33c2dcfd DA |
1025 | max = SIZE_MAX / page_size; |
1026 | ||
1027 | pages = parse_pages_arg(str, 1, max); | |
1028 | if (pages < 0) { | |
1029 | pr_err("Invalid argument for --mmap_pages/-m\n"); | |
994a1f78 JO |
1030 | return -1; |
1031 | } | |
1032 | ||
1033 | *mmap_pages = pages; | |
1034 | return 0; | |
1035 | } | |
1036 | ||
e9db1310 AH |
1037 | int perf_evlist__parse_mmap_pages(const struct option *opt, const char *str, |
1038 | int unset __maybe_unused) | |
1039 | { | |
1040 | return __perf_evlist__parse_mmap_pages(opt->value, str); | |
1041 | } | |
1042 | ||
c83fa7f2 | 1043 | /** |
718c602d | 1044 | * perf_evlist__mmap_ex - Create mmaps to receive events. |
c83fa7f2 AH |
1045 | * @evlist: list of events |
1046 | * @pages: map length in pages | |
1047 | * @overwrite: overwrite older events? | |
718c602d AH |
1048 | * @auxtrace_pages - auxtrace map length in pages |
1049 | * @auxtrace_overwrite - overwrite older auxtrace data? | |
f8a95309 | 1050 | * |
c83fa7f2 AH |
1051 | * If @overwrite is %false the user needs to signal event consumption using |
1052 | * perf_mmap__write_tail(). Using perf_evlist__mmap_read() does this | |
1053 | * automatically. | |
7e2ed097 | 1054 | * |
718c602d AH |
1055 | * Similarly, if @auxtrace_overwrite is %false the user needs to signal data |
1056 | * consumption using auxtrace_mmap__write_tail(). | |
1057 | * | |
c83fa7f2 | 1058 | * Return: %0 on success, negative error code otherwise. |
f8a95309 | 1059 | */ |
718c602d AH |
1060 | int perf_evlist__mmap_ex(struct perf_evlist *evlist, unsigned int pages, |
1061 | bool overwrite, unsigned int auxtrace_pages, | |
1062 | bool auxtrace_overwrite) | |
f8a95309 | 1063 | { |
aece948f | 1064 | struct perf_evsel *evsel; |
7e2ed097 ACM |
1065 | const struct cpu_map *cpus = evlist->cpus; |
1066 | const struct thread_map *threads = evlist->threads; | |
a8a8f3eb AH |
1067 | struct mmap_params mp = { |
1068 | .prot = PROT_READ | (overwrite ? 0 : PROT_WRITE), | |
1069 | }; | |
50a682ce | 1070 | |
7e2ed097 | 1071 | if (evlist->mmap == NULL && perf_evlist__alloc_mmap(evlist) < 0) |
f8a95309 ACM |
1072 | return -ENOMEM; |
1073 | ||
1b85337d | 1074 | if (evlist->pollfd.entries == NULL && perf_evlist__alloc_pollfd(evlist) < 0) |
f8a95309 ACM |
1075 | return -ENOMEM; |
1076 | ||
1077 | evlist->overwrite = overwrite; | |
994a1f78 | 1078 | evlist->mmap_len = perf_evlist__mmap_size(pages); |
2af68ef5 | 1079 | pr_debug("mmap size %zuB\n", evlist->mmap_len); |
a8a8f3eb | 1080 | mp.mask = evlist->mmap_len - page_size - 1; |
f8a95309 | 1081 | |
718c602d AH |
1082 | auxtrace_mmap_params__init(&mp.auxtrace_mp, evlist->mmap_len, |
1083 | auxtrace_pages, auxtrace_overwrite); | |
1084 | ||
0050f7aa | 1085 | evlist__for_each(evlist, evsel) { |
f8a95309 | 1086 | if ((evsel->attr.read_format & PERF_FORMAT_ID) && |
a91e5431 | 1087 | evsel->sample_id == NULL && |
a14bb7a6 | 1088 | perf_evsel__alloc_id(evsel, cpu_map__nr(cpus), threads->nr) < 0) |
f8a95309 | 1089 | return -ENOMEM; |
f8a95309 ACM |
1090 | } |
1091 | ||
ec1e7e43 | 1092 | if (cpu_map__empty(cpus)) |
a8a8f3eb | 1093 | return perf_evlist__mmap_per_thread(evlist, &mp); |
f8a95309 | 1094 | |
a8a8f3eb | 1095 | return perf_evlist__mmap_per_cpu(evlist, &mp); |
f8a95309 | 1096 | } |
7e2ed097 | 1097 | |
718c602d AH |
1098 | int perf_evlist__mmap(struct perf_evlist *evlist, unsigned int pages, |
1099 | bool overwrite) | |
1100 | { | |
1101 | return perf_evlist__mmap_ex(evlist, pages, overwrite, 0, false); | |
1102 | } | |
1103 | ||
b7f0c203 | 1104 | static int perf_evlist__propagate_maps(struct perf_evlist *evlist, |
52361ff0 | 1105 | bool has_user_cpus) |
b7f0c203 JO |
1106 | { |
1107 | struct perf_evsel *evsel; | |
1108 | ||
1109 | evlist__for_each(evlist, evsel) { | |
1110 | /* | |
1111 | * We already have cpus for evsel (via PMU sysfs) so | |
1112 | * keep it, if there's no target cpu list defined. | |
1113 | */ | |
52361ff0 | 1114 | if (evsel->cpus && has_user_cpus) |
b7f0c203 JO |
1115 | cpu_map__put(evsel->cpus); |
1116 | ||
52361ff0 | 1117 | if (!evsel->cpus || has_user_cpus) |
b7f0c203 JO |
1118 | evsel->cpus = cpu_map__get(evlist->cpus); |
1119 | ||
578e91ec JO |
1120 | evsel->threads = thread_map__get(evlist->threads); |
1121 | ||
0e5ffb31 JO |
1122 | if ((evlist->cpus && !evsel->cpus) || |
1123 | (evlist->threads && !evsel->threads)) | |
b7f0c203 JO |
1124 | return -ENOMEM; |
1125 | } | |
1126 | ||
1127 | return 0; | |
1128 | } | |
1129 | ||
602ad878 | 1130 | int perf_evlist__create_maps(struct perf_evlist *evlist, struct target *target) |
7e2ed097 | 1131 | { |
b809ac10 NK |
1132 | evlist->threads = thread_map__new_str(target->pid, target->tid, |
1133 | target->uid); | |
7e2ed097 ACM |
1134 | |
1135 | if (evlist->threads == NULL) | |
1136 | return -1; | |
1137 | ||
9c105fbc | 1138 | if (target__uses_dummy_map(target)) |
d1cb9fce | 1139 | evlist->cpus = cpu_map__dummy_new(); |
879d77d0 NK |
1140 | else |
1141 | evlist->cpus = cpu_map__new(target->cpu_list); | |
7e2ed097 ACM |
1142 | |
1143 | if (evlist->cpus == NULL) | |
1144 | goto out_delete_threads; | |
1145 | ||
52361ff0 | 1146 | return perf_evlist__propagate_maps(evlist, !!target->cpu_list); |
7e2ed097 ACM |
1147 | |
1148 | out_delete_threads: | |
186fbb74 | 1149 | thread_map__put(evlist->threads); |
b2e19a93 | 1150 | evlist->threads = NULL; |
7e2ed097 ACM |
1151 | return -1; |
1152 | } | |
1153 | ||
3de5cfb0 JO |
1154 | int perf_evlist__set_maps(struct perf_evlist *evlist, |
1155 | struct cpu_map *cpus, | |
1156 | struct thread_map *threads) | |
1157 | { | |
1158 | if (evlist->cpus) | |
1159 | cpu_map__put(evlist->cpus); | |
1160 | ||
1161 | evlist->cpus = cpus; | |
1162 | ||
1163 | if (evlist->threads) | |
1164 | thread_map__put(evlist->threads); | |
1165 | ||
1166 | evlist->threads = threads; | |
1167 | ||
1168 | return perf_evlist__propagate_maps(evlist, false); | |
1169 | } | |
1170 | ||
23d4aad4 | 1171 | int perf_evlist__apply_filters(struct perf_evlist *evlist, struct perf_evsel **err_evsel) |
0a102479 | 1172 | { |
0a102479 | 1173 | struct perf_evsel *evsel; |
745cefc5 ACM |
1174 | int err = 0; |
1175 | const int ncpus = cpu_map__nr(evlist->cpus), | |
b3a319d5 | 1176 | nthreads = thread_map__nr(evlist->threads); |
0a102479 | 1177 | |
0050f7aa | 1178 | evlist__for_each(evlist, evsel) { |
745cefc5 | 1179 | if (evsel->filter == NULL) |
0a102479 | 1180 | continue; |
745cefc5 | 1181 | |
f47805a2 | 1182 | err = perf_evsel__apply_filter(evsel, ncpus, nthreads, evsel->filter); |
23d4aad4 ACM |
1183 | if (err) { |
1184 | *err_evsel = evsel; | |
745cefc5 | 1185 | break; |
23d4aad4 | 1186 | } |
0a102479 FW |
1187 | } |
1188 | ||
745cefc5 ACM |
1189 | return err; |
1190 | } | |
1191 | ||
1192 | int perf_evlist__set_filter(struct perf_evlist *evlist, const char *filter) | |
1193 | { | |
1194 | struct perf_evsel *evsel; | |
1195 | int err = 0; | |
745cefc5 | 1196 | |
0050f7aa | 1197 | evlist__for_each(evlist, evsel) { |
94ad89bc | 1198 | err = perf_evsel__set_filter(evsel, filter); |
745cefc5 ACM |
1199 | if (err) |
1200 | break; | |
1201 | } | |
1202 | ||
1203 | return err; | |
0a102479 | 1204 | } |
74429964 | 1205 | |
be199ada | 1206 | int perf_evlist__set_filter_pids(struct perf_evlist *evlist, size_t npids, pid_t *pids) |
cfd70a26 ACM |
1207 | { |
1208 | char *filter; | |
be199ada ACM |
1209 | int ret = -1; |
1210 | size_t i; | |
cfd70a26 | 1211 | |
be199ada ACM |
1212 | for (i = 0; i < npids; ++i) { |
1213 | if (i == 0) { | |
1214 | if (asprintf(&filter, "common_pid != %d", pids[i]) < 0) | |
1215 | return -1; | |
1216 | } else { | |
1217 | char *tmp; | |
1218 | ||
1219 | if (asprintf(&tmp, "%s && common_pid != %d", filter, pids[i]) < 0) | |
1220 | goto out_free; | |
1221 | ||
1222 | free(filter); | |
1223 | filter = tmp; | |
1224 | } | |
1225 | } | |
cfd70a26 ACM |
1226 | |
1227 | ret = perf_evlist__set_filter(evlist, filter); | |
be199ada | 1228 | out_free: |
cfd70a26 ACM |
1229 | free(filter); |
1230 | return ret; | |
1231 | } | |
1232 | ||
be199ada ACM |
1233 | int perf_evlist__set_filter_pid(struct perf_evlist *evlist, pid_t pid) |
1234 | { | |
1235 | return perf_evlist__set_filter_pids(evlist, 1, &pid); | |
1236 | } | |
1237 | ||
0c21f736 | 1238 | bool perf_evlist__valid_sample_type(struct perf_evlist *evlist) |
74429964 | 1239 | { |
75562573 | 1240 | struct perf_evsel *pos; |
c2a70653 | 1241 | |
75562573 AH |
1242 | if (evlist->nr_entries == 1) |
1243 | return true; | |
1244 | ||
1245 | if (evlist->id_pos < 0 || evlist->is_pos < 0) | |
1246 | return false; | |
1247 | ||
0050f7aa | 1248 | evlist__for_each(evlist, pos) { |
75562573 AH |
1249 | if (pos->id_pos != evlist->id_pos || |
1250 | pos->is_pos != evlist->is_pos) | |
c2a70653 | 1251 | return false; |
74429964 FW |
1252 | } |
1253 | ||
c2a70653 | 1254 | return true; |
74429964 FW |
1255 | } |
1256 | ||
75562573 | 1257 | u64 __perf_evlist__combined_sample_type(struct perf_evlist *evlist) |
c2a70653 | 1258 | { |
75562573 AH |
1259 | struct perf_evsel *evsel; |
1260 | ||
1261 | if (evlist->combined_sample_type) | |
1262 | return evlist->combined_sample_type; | |
1263 | ||
0050f7aa | 1264 | evlist__for_each(evlist, evsel) |
75562573 AH |
1265 | evlist->combined_sample_type |= evsel->attr.sample_type; |
1266 | ||
1267 | return evlist->combined_sample_type; | |
1268 | } | |
1269 | ||
1270 | u64 perf_evlist__combined_sample_type(struct perf_evlist *evlist) | |
1271 | { | |
1272 | evlist->combined_sample_type = 0; | |
1273 | return __perf_evlist__combined_sample_type(evlist); | |
c2a70653 ACM |
1274 | } |
1275 | ||
98df858e AK |
1276 | u64 perf_evlist__combined_branch_type(struct perf_evlist *evlist) |
1277 | { | |
1278 | struct perf_evsel *evsel; | |
1279 | u64 branch_type = 0; | |
1280 | ||
1281 | evlist__for_each(evlist, evsel) | |
1282 | branch_type |= evsel->attr.branch_sample_type; | |
1283 | return branch_type; | |
1284 | } | |
1285 | ||
9ede473c JO |
1286 | bool perf_evlist__valid_read_format(struct perf_evlist *evlist) |
1287 | { | |
1288 | struct perf_evsel *first = perf_evlist__first(evlist), *pos = first; | |
1289 | u64 read_format = first->attr.read_format; | |
1290 | u64 sample_type = first->attr.sample_type; | |
1291 | ||
0050f7aa | 1292 | evlist__for_each(evlist, pos) { |
9ede473c JO |
1293 | if (read_format != pos->attr.read_format) |
1294 | return false; | |
1295 | } | |
1296 | ||
1297 | /* PERF_SAMPLE_READ imples PERF_FORMAT_ID. */ | |
1298 | if ((sample_type & PERF_SAMPLE_READ) && | |
1299 | !(read_format & PERF_FORMAT_ID)) { | |
1300 | return false; | |
1301 | } | |
1302 | ||
1303 | return true; | |
1304 | } | |
1305 | ||
1306 | u64 perf_evlist__read_format(struct perf_evlist *evlist) | |
1307 | { | |
1308 | struct perf_evsel *first = perf_evlist__first(evlist); | |
1309 | return first->attr.read_format; | |
1310 | } | |
1311 | ||
0c21f736 | 1312 | u16 perf_evlist__id_hdr_size(struct perf_evlist *evlist) |
81e36bff | 1313 | { |
0c21f736 | 1314 | struct perf_evsel *first = perf_evlist__first(evlist); |
81e36bff ACM |
1315 | struct perf_sample *data; |
1316 | u64 sample_type; | |
1317 | u16 size = 0; | |
1318 | ||
81e36bff ACM |
1319 | if (!first->attr.sample_id_all) |
1320 | goto out; | |
1321 | ||
1322 | sample_type = first->attr.sample_type; | |
1323 | ||
1324 | if (sample_type & PERF_SAMPLE_TID) | |
1325 | size += sizeof(data->tid) * 2; | |
1326 | ||
1327 | if (sample_type & PERF_SAMPLE_TIME) | |
1328 | size += sizeof(data->time); | |
1329 | ||
1330 | if (sample_type & PERF_SAMPLE_ID) | |
1331 | size += sizeof(data->id); | |
1332 | ||
1333 | if (sample_type & PERF_SAMPLE_STREAM_ID) | |
1334 | size += sizeof(data->stream_id); | |
1335 | ||
1336 | if (sample_type & PERF_SAMPLE_CPU) | |
1337 | size += sizeof(data->cpu) * 2; | |
75562573 AH |
1338 | |
1339 | if (sample_type & PERF_SAMPLE_IDENTIFIER) | |
1340 | size += sizeof(data->id); | |
81e36bff ACM |
1341 | out: |
1342 | return size; | |
1343 | } | |
1344 | ||
0c21f736 | 1345 | bool perf_evlist__valid_sample_id_all(struct perf_evlist *evlist) |
74429964 | 1346 | { |
0c21f736 | 1347 | struct perf_evsel *first = perf_evlist__first(evlist), *pos = first; |
c2a70653 | 1348 | |
0050f7aa | 1349 | evlist__for_each_continue(evlist, pos) { |
c2a70653 ACM |
1350 | if (first->attr.sample_id_all != pos->attr.sample_id_all) |
1351 | return false; | |
74429964 FW |
1352 | } |
1353 | ||
c2a70653 ACM |
1354 | return true; |
1355 | } | |
1356 | ||
0c21f736 | 1357 | bool perf_evlist__sample_id_all(struct perf_evlist *evlist) |
c2a70653 | 1358 | { |
0c21f736 | 1359 | struct perf_evsel *first = perf_evlist__first(evlist); |
c2a70653 | 1360 | return first->attr.sample_id_all; |
74429964 | 1361 | } |
81cce8de ACM |
1362 | |
1363 | void perf_evlist__set_selected(struct perf_evlist *evlist, | |
1364 | struct perf_evsel *evsel) | |
1365 | { | |
1366 | evlist->selected = evsel; | |
1367 | } | |
727ab04e | 1368 | |
a74b4b66 NK |
1369 | void perf_evlist__close(struct perf_evlist *evlist) |
1370 | { | |
1371 | struct perf_evsel *evsel; | |
1372 | int ncpus = cpu_map__nr(evlist->cpus); | |
1373 | int nthreads = thread_map__nr(evlist->threads); | |
8ad9219e | 1374 | int n; |
a74b4b66 | 1375 | |
8ad9219e SE |
1376 | evlist__for_each_reverse(evlist, evsel) { |
1377 | n = evsel->cpus ? evsel->cpus->nr : ncpus; | |
1378 | perf_evsel__close(evsel, n, nthreads); | |
1379 | } | |
a74b4b66 NK |
1380 | } |
1381 | ||
4112eb18 ACM |
1382 | static int perf_evlist__create_syswide_maps(struct perf_evlist *evlist) |
1383 | { | |
1384 | int err = -ENOMEM; | |
1385 | ||
1386 | /* | |
1387 | * Try reading /sys/devices/system/cpu/online to get | |
1388 | * an all cpus map. | |
1389 | * | |
1390 | * FIXME: -ENOMEM is the best we can do here, the cpu_map | |
1391 | * code needs an overhaul to properly forward the | |
1392 | * error, and we may not want to do that fallback to a | |
1393 | * default cpu identity map :-\ | |
1394 | */ | |
1395 | evlist->cpus = cpu_map__new(NULL); | |
1396 | if (evlist->cpus == NULL) | |
1397 | goto out; | |
1398 | ||
1399 | evlist->threads = thread_map__new_dummy(); | |
1400 | if (evlist->threads == NULL) | |
1401 | goto out_free_cpus; | |
1402 | ||
1403 | err = 0; | |
1404 | out: | |
1405 | return err; | |
1406 | out_free_cpus: | |
f30a79b0 | 1407 | cpu_map__put(evlist->cpus); |
4112eb18 ACM |
1408 | evlist->cpus = NULL; |
1409 | goto out; | |
1410 | } | |
1411 | ||
6a4bb04c | 1412 | int perf_evlist__open(struct perf_evlist *evlist) |
727ab04e | 1413 | { |
6a4bb04c | 1414 | struct perf_evsel *evsel; |
a74b4b66 | 1415 | int err; |
727ab04e | 1416 | |
4112eb18 ACM |
1417 | /* |
1418 | * Default: one fd per CPU, all threads, aka systemwide | |
1419 | * as sys_perf_event_open(cpu = -1, thread = -1) is EINVAL | |
1420 | */ | |
1421 | if (evlist->threads == NULL && evlist->cpus == NULL) { | |
1422 | err = perf_evlist__create_syswide_maps(evlist); | |
1423 | if (err < 0) | |
1424 | goto out_err; | |
1425 | } | |
1426 | ||
733cd2fe AH |
1427 | perf_evlist__update_id_pos(evlist); |
1428 | ||
0050f7aa | 1429 | evlist__for_each(evlist, evsel) { |
6a4bb04c | 1430 | err = perf_evsel__open(evsel, evlist->cpus, evlist->threads); |
727ab04e ACM |
1431 | if (err < 0) |
1432 | goto out_err; | |
1433 | } | |
1434 | ||
1435 | return 0; | |
1436 | out_err: | |
a74b4b66 | 1437 | perf_evlist__close(evlist); |
41c21a68 | 1438 | errno = -err; |
727ab04e ACM |
1439 | return err; |
1440 | } | |
35b9d88e | 1441 | |
602ad878 | 1442 | int perf_evlist__prepare_workload(struct perf_evlist *evlist, struct target *target, |
55e162ea | 1443 | const char *argv[], bool pipe_output, |
735f7e0b | 1444 | void (*exec_error)(int signo, siginfo_t *info, void *ucontext)) |
35b9d88e ACM |
1445 | { |
1446 | int child_ready_pipe[2], go_pipe[2]; | |
1447 | char bf; | |
1448 | ||
1449 | if (pipe(child_ready_pipe) < 0) { | |
1450 | perror("failed to create 'ready' pipe"); | |
1451 | return -1; | |
1452 | } | |
1453 | ||
1454 | if (pipe(go_pipe) < 0) { | |
1455 | perror("failed to create 'go' pipe"); | |
1456 | goto out_close_ready_pipe; | |
1457 | } | |
1458 | ||
1459 | evlist->workload.pid = fork(); | |
1460 | if (evlist->workload.pid < 0) { | |
1461 | perror("failed to fork"); | |
1462 | goto out_close_pipes; | |
1463 | } | |
1464 | ||
1465 | if (!evlist->workload.pid) { | |
5f1c4225 ACM |
1466 | int ret; |
1467 | ||
119fa3c9 | 1468 | if (pipe_output) |
35b9d88e ACM |
1469 | dup2(2, 1); |
1470 | ||
0817df08 DA |
1471 | signal(SIGTERM, SIG_DFL); |
1472 | ||
35b9d88e ACM |
1473 | close(child_ready_pipe[0]); |
1474 | close(go_pipe[1]); | |
1475 | fcntl(go_pipe[0], F_SETFD, FD_CLOEXEC); | |
1476 | ||
35b9d88e ACM |
1477 | /* |
1478 | * Tell the parent we're ready to go | |
1479 | */ | |
1480 | close(child_ready_pipe[1]); | |
1481 | ||
1482 | /* | |
1483 | * Wait until the parent tells us to go. | |
1484 | */ | |
5f1c4225 ACM |
1485 | ret = read(go_pipe[0], &bf, 1); |
1486 | /* | |
1487 | * The parent will ask for the execvp() to be performed by | |
1488 | * writing exactly one byte, in workload.cork_fd, usually via | |
1489 | * perf_evlist__start_workload(). | |
1490 | * | |
20f86fc1 | 1491 | * For cancelling the workload without actually running it, |
5f1c4225 ACM |
1492 | * the parent will just close workload.cork_fd, without writing |
1493 | * anything, i.e. read will return zero and we just exit() | |
1494 | * here. | |
1495 | */ | |
1496 | if (ret != 1) { | |
1497 | if (ret == -1) | |
1498 | perror("unable to read pipe"); | |
1499 | exit(ret); | |
1500 | } | |
35b9d88e ACM |
1501 | |
1502 | execvp(argv[0], (char **)argv); | |
1503 | ||
735f7e0b | 1504 | if (exec_error) { |
f33cbe72 ACM |
1505 | union sigval val; |
1506 | ||
1507 | val.sival_int = errno; | |
1508 | if (sigqueue(getppid(), SIGUSR1, val)) | |
1509 | perror(argv[0]); | |
1510 | } else | |
1511 | perror(argv[0]); | |
35b9d88e ACM |
1512 | exit(-1); |
1513 | } | |
1514 | ||
735f7e0b ACM |
1515 | if (exec_error) { |
1516 | struct sigaction act = { | |
1517 | .sa_flags = SA_SIGINFO, | |
1518 | .sa_sigaction = exec_error, | |
1519 | }; | |
1520 | sigaction(SIGUSR1, &act, NULL); | |
1521 | } | |
1522 | ||
1aaf63b1 ACM |
1523 | if (target__none(target)) { |
1524 | if (evlist->threads == NULL) { | |
1525 | fprintf(stderr, "FATAL: evlist->threads need to be set at this point (%s:%d).\n", | |
1526 | __func__, __LINE__); | |
1527 | goto out_close_pipes; | |
1528 | } | |
e13798c7 | 1529 | thread_map__set_pid(evlist->threads, 0, evlist->workload.pid); |
1aaf63b1 | 1530 | } |
35b9d88e ACM |
1531 | |
1532 | close(child_ready_pipe[1]); | |
1533 | close(go_pipe[0]); | |
1534 | /* | |
1535 | * wait for child to settle | |
1536 | */ | |
1537 | if (read(child_ready_pipe[0], &bf, 1) == -1) { | |
1538 | perror("unable to read pipe"); | |
1539 | goto out_close_pipes; | |
1540 | } | |
1541 | ||
bcf3145f | 1542 | fcntl(go_pipe[1], F_SETFD, FD_CLOEXEC); |
35b9d88e ACM |
1543 | evlist->workload.cork_fd = go_pipe[1]; |
1544 | close(child_ready_pipe[0]); | |
1545 | return 0; | |
1546 | ||
1547 | out_close_pipes: | |
1548 | close(go_pipe[0]); | |
1549 | close(go_pipe[1]); | |
1550 | out_close_ready_pipe: | |
1551 | close(child_ready_pipe[0]); | |
1552 | close(child_ready_pipe[1]); | |
1553 | return -1; | |
1554 | } | |
1555 | ||
1556 | int perf_evlist__start_workload(struct perf_evlist *evlist) | |
1557 | { | |
1558 | if (evlist->workload.cork_fd > 0) { | |
b3824404 | 1559 | char bf = 0; |
bcf3145f | 1560 | int ret; |
35b9d88e ACM |
1561 | /* |
1562 | * Remove the cork, let it rip! | |
1563 | */ | |
bcf3145f NK |
1564 | ret = write(evlist->workload.cork_fd, &bf, 1); |
1565 | if (ret < 0) | |
1566 | perror("enable to write to pipe"); | |
1567 | ||
1568 | close(evlist->workload.cork_fd); | |
1569 | return ret; | |
35b9d88e ACM |
1570 | } |
1571 | ||
1572 | return 0; | |
1573 | } | |
cb0b29e0 | 1574 | |
a3f698fe | 1575 | int perf_evlist__parse_sample(struct perf_evlist *evlist, union perf_event *event, |
0807d2d8 | 1576 | struct perf_sample *sample) |
cb0b29e0 | 1577 | { |
75562573 AH |
1578 | struct perf_evsel *evsel = perf_evlist__event2evsel(evlist, event); |
1579 | ||
1580 | if (!evsel) | |
1581 | return -EFAULT; | |
0807d2d8 | 1582 | return perf_evsel__parse_sample(evsel, event, sample); |
cb0b29e0 | 1583 | } |
78f067b3 ACM |
1584 | |
1585 | size_t perf_evlist__fprintf(struct perf_evlist *evlist, FILE *fp) | |
1586 | { | |
1587 | struct perf_evsel *evsel; | |
1588 | size_t printed = 0; | |
1589 | ||
0050f7aa | 1590 | evlist__for_each(evlist, evsel) { |
78f067b3 ACM |
1591 | printed += fprintf(fp, "%s%s", evsel->idx ? ", " : "", |
1592 | perf_evsel__name(evsel)); | |
1593 | } | |
1594 | ||
b2222139 | 1595 | return printed + fprintf(fp, "\n"); |
78f067b3 | 1596 | } |
6ef068cb | 1597 | |
a8f23d8f ACM |
1598 | int perf_evlist__strerror_open(struct perf_evlist *evlist __maybe_unused, |
1599 | int err, char *buf, size_t size) | |
1600 | { | |
1601 | int printed, value; | |
6e81c74c | 1602 | char sbuf[STRERR_BUFSIZE], *emsg = strerror_r(err, sbuf, sizeof(sbuf)); |
a8f23d8f ACM |
1603 | |
1604 | switch (err) { | |
1605 | case EACCES: | |
1606 | case EPERM: | |
1607 | printed = scnprintf(buf, size, | |
1608 | "Error:\t%s.\n" | |
1609 | "Hint:\tCheck /proc/sys/kernel/perf_event_paranoid setting.", emsg); | |
1610 | ||
1a47245d | 1611 | value = perf_event_paranoid(); |
a8f23d8f ACM |
1612 | |
1613 | printed += scnprintf(buf + printed, size - printed, "\nHint:\t"); | |
1614 | ||
1615 | if (value >= 2) { | |
1616 | printed += scnprintf(buf + printed, size - printed, | |
1617 | "For your workloads it needs to be <= 1\nHint:\t"); | |
1618 | } | |
1619 | printed += scnprintf(buf + printed, size - printed, | |
5229e366 | 1620 | "For system wide tracing it needs to be set to -1.\n"); |
a8f23d8f ACM |
1621 | |
1622 | printed += scnprintf(buf + printed, size - printed, | |
5229e366 ACM |
1623 | "Hint:\tTry: 'sudo sh -c \"echo -1 > /proc/sys/kernel/perf_event_paranoid\"'\n" |
1624 | "Hint:\tThe current value is %d.", value); | |
a8f23d8f ACM |
1625 | break; |
1626 | default: | |
1627 | scnprintf(buf, size, "%s", emsg); | |
1628 | break; | |
1629 | } | |
1630 | ||
1631 | return 0; | |
1632 | } | |
a025e4f0 | 1633 | |
956fa571 ACM |
1634 | int perf_evlist__strerror_mmap(struct perf_evlist *evlist, int err, char *buf, size_t size) |
1635 | { | |
1636 | char sbuf[STRERR_BUFSIZE], *emsg = strerror_r(err, sbuf, sizeof(sbuf)); | |
e965bea1 | 1637 | int pages_attempted = evlist->mmap_len / 1024, pages_max_per_user, printed = 0; |
956fa571 ACM |
1638 | |
1639 | switch (err) { | |
1640 | case EPERM: | |
e5d4a290 | 1641 | sysctl__read_int("kernel/perf_event_mlock_kb", &pages_max_per_user); |
e965bea1 ACM |
1642 | printed += scnprintf(buf + printed, size - printed, |
1643 | "Error:\t%s.\n" | |
956fa571 | 1644 | "Hint:\tCheck /proc/sys/kernel/perf_event_mlock_kb (%d kB) setting.\n" |
e965bea1 | 1645 | "Hint:\tTried using %zd kB.\n", |
e5d4a290 | 1646 | emsg, pages_max_per_user, pages_attempted); |
e965bea1 ACM |
1647 | |
1648 | if (pages_attempted >= pages_max_per_user) { | |
1649 | printed += scnprintf(buf + printed, size - printed, | |
1650 | "Hint:\tTry 'sudo sh -c \"echo %d > /proc/sys/kernel/perf_event_mlock_kb\"', or\n", | |
1651 | pages_max_per_user + pages_attempted); | |
1652 | } | |
1653 | ||
1654 | printed += scnprintf(buf + printed, size - printed, | |
1655 | "Hint:\tTry using a smaller -m/--mmap-pages value."); | |
956fa571 ACM |
1656 | break; |
1657 | default: | |
1658 | scnprintf(buf, size, "%s", emsg); | |
1659 | break; | |
1660 | } | |
1661 | ||
1662 | return 0; | |
1663 | } | |
1664 | ||
a025e4f0 AH |
1665 | void perf_evlist__to_front(struct perf_evlist *evlist, |
1666 | struct perf_evsel *move_evsel) | |
1667 | { | |
1668 | struct perf_evsel *evsel, *n; | |
1669 | LIST_HEAD(move); | |
1670 | ||
1671 | if (move_evsel == perf_evlist__first(evlist)) | |
1672 | return; | |
1673 | ||
0050f7aa | 1674 | evlist__for_each_safe(evlist, n, evsel) { |
a025e4f0 AH |
1675 | if (evsel->leader == move_evsel->leader) |
1676 | list_move_tail(&evsel->node, &move); | |
1677 | } | |
1678 | ||
1679 | list_splice(&move, &evlist->entries); | |
1680 | } | |
60b0896c AH |
1681 | |
1682 | void perf_evlist__set_tracking_event(struct perf_evlist *evlist, | |
1683 | struct perf_evsel *tracking_evsel) | |
1684 | { | |
1685 | struct perf_evsel *evsel; | |
1686 | ||
1687 | if (tracking_evsel->tracking) | |
1688 | return; | |
1689 | ||
1690 | evlist__for_each(evlist, evsel) { | |
1691 | if (evsel != tracking_evsel) | |
1692 | evsel->tracking = false; | |
1693 | } | |
1694 | ||
1695 | tracking_evsel->tracking = true; | |
1696 | } |