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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" |
4b6ab94e | 21 | #include <subcmd/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> |
8dd2a131 | 28 | #include <linux/err.h> |
70db7533 | 29 | |
e4b356b5 ACM |
30 | static void perf_evlist__mmap_put(struct perf_evlist *evlist, int idx); |
31 | static void __perf_evlist__munmap(struct perf_evlist *evlist, int idx); | |
32 | ||
f8a95309 | 33 | #define FD(e, x, y) (*(int *)xyarray__entry(e->fd, x, y)) |
a91e5431 | 34 | #define SID(e, x, y) xyarray__entry(e->sample_id, x, y) |
f8a95309 | 35 | |
7e2ed097 ACM |
36 | void perf_evlist__init(struct perf_evlist *evlist, struct cpu_map *cpus, |
37 | struct thread_map *threads) | |
ef1d1af2 ACM |
38 | { |
39 | int i; | |
40 | ||
41 | for (i = 0; i < PERF_EVLIST__HLIST_SIZE; ++i) | |
42 | INIT_HLIST_HEAD(&evlist->heads[i]); | |
43 | INIT_LIST_HEAD(&evlist->entries); | |
7e2ed097 | 44 | perf_evlist__set_maps(evlist, cpus, threads); |
1b85337d | 45 | fdarray__init(&evlist->pollfd, 64); |
35b9d88e | 46 | evlist->workload.pid = -1; |
3a62a7b8 | 47 | evlist->backward = false; |
ef1d1af2 ACM |
48 | } |
49 | ||
334fe7a3 | 50 | struct perf_evlist *perf_evlist__new(void) |
361c99a6 ACM |
51 | { |
52 | struct perf_evlist *evlist = zalloc(sizeof(*evlist)); | |
53 | ||
ef1d1af2 | 54 | if (evlist != NULL) |
334fe7a3 | 55 | perf_evlist__init(evlist, NULL, NULL); |
361c99a6 ACM |
56 | |
57 | return evlist; | |
58 | } | |
59 | ||
b22d54b0 JO |
60 | struct perf_evlist *perf_evlist__new_default(void) |
61 | { | |
62 | struct perf_evlist *evlist = perf_evlist__new(); | |
63 | ||
64 | if (evlist && perf_evlist__add_default(evlist)) { | |
65 | perf_evlist__delete(evlist); | |
66 | evlist = NULL; | |
67 | } | |
68 | ||
69 | return evlist; | |
70 | } | |
71 | ||
5bae0250 ACM |
72 | struct perf_evlist *perf_evlist__new_dummy(void) |
73 | { | |
74 | struct perf_evlist *evlist = perf_evlist__new(); | |
75 | ||
76 | if (evlist && perf_evlist__add_dummy(evlist)) { | |
77 | perf_evlist__delete(evlist); | |
78 | evlist = NULL; | |
79 | } | |
80 | ||
81 | return evlist; | |
82 | } | |
83 | ||
75562573 AH |
84 | /** |
85 | * perf_evlist__set_id_pos - set the positions of event ids. | |
86 | * @evlist: selected event list | |
87 | * | |
88 | * Events with compatible sample types all have the same id_pos | |
89 | * and is_pos. For convenience, put a copy on evlist. | |
90 | */ | |
91 | void perf_evlist__set_id_pos(struct perf_evlist *evlist) | |
92 | { | |
93 | struct perf_evsel *first = perf_evlist__first(evlist); | |
94 | ||
95 | evlist->id_pos = first->id_pos; | |
96 | evlist->is_pos = first->is_pos; | |
97 | } | |
98 | ||
733cd2fe AH |
99 | static void perf_evlist__update_id_pos(struct perf_evlist *evlist) |
100 | { | |
101 | struct perf_evsel *evsel; | |
102 | ||
e5cadb93 | 103 | evlist__for_each_entry(evlist, evsel) |
733cd2fe AH |
104 | perf_evsel__calc_id_pos(evsel); |
105 | ||
106 | perf_evlist__set_id_pos(evlist); | |
107 | } | |
108 | ||
361c99a6 ACM |
109 | static void perf_evlist__purge(struct perf_evlist *evlist) |
110 | { | |
111 | struct perf_evsel *pos, *n; | |
112 | ||
e5cadb93 | 113 | evlist__for_each_entry_safe(evlist, n, pos) { |
361c99a6 | 114 | list_del_init(&pos->node); |
d49e4695 | 115 | pos->evlist = NULL; |
361c99a6 ACM |
116 | perf_evsel__delete(pos); |
117 | } | |
118 | ||
119 | evlist->nr_entries = 0; | |
120 | } | |
121 | ||
ef1d1af2 | 122 | void perf_evlist__exit(struct perf_evlist *evlist) |
361c99a6 | 123 | { |
04662523 | 124 | zfree(&evlist->mmap); |
1b85337d | 125 | fdarray__exit(&evlist->pollfd); |
ef1d1af2 ACM |
126 | } |
127 | ||
128 | void perf_evlist__delete(struct perf_evlist *evlist) | |
129 | { | |
0b04b3dc ACM |
130 | if (evlist == NULL) |
131 | return; | |
132 | ||
983874d1 | 133 | perf_evlist__munmap(evlist); |
f26e1c7c | 134 | perf_evlist__close(evlist); |
f30a79b0 | 135 | cpu_map__put(evlist->cpus); |
186fbb74 | 136 | thread_map__put(evlist->threads); |
03ad9747 ACM |
137 | evlist->cpus = NULL; |
138 | evlist->threads = NULL; | |
ef1d1af2 ACM |
139 | perf_evlist__purge(evlist); |
140 | perf_evlist__exit(evlist); | |
361c99a6 ACM |
141 | free(evlist); |
142 | } | |
143 | ||
adc0c3e8 AH |
144 | static void __perf_evlist__propagate_maps(struct perf_evlist *evlist, |
145 | struct perf_evsel *evsel) | |
146 | { | |
147 | /* | |
148 | * We already have cpus for evsel (via PMU sysfs) so | |
149 | * keep it, if there's no target cpu list defined. | |
150 | */ | |
151 | if (!evsel->own_cpus || evlist->has_user_cpus) { | |
152 | cpu_map__put(evsel->cpus); | |
153 | evsel->cpus = cpu_map__get(evlist->cpus); | |
154 | } else if (evsel->cpus != evsel->own_cpus) { | |
155 | cpu_map__put(evsel->cpus); | |
156 | evsel->cpus = cpu_map__get(evsel->own_cpus); | |
157 | } | |
158 | ||
159 | thread_map__put(evsel->threads); | |
160 | evsel->threads = thread_map__get(evlist->threads); | |
161 | } | |
162 | ||
163 | static void perf_evlist__propagate_maps(struct perf_evlist *evlist) | |
164 | { | |
165 | struct perf_evsel *evsel; | |
166 | ||
e5cadb93 | 167 | evlist__for_each_entry(evlist, evsel) |
adc0c3e8 AH |
168 | __perf_evlist__propagate_maps(evlist, evsel); |
169 | } | |
170 | ||
361c99a6 ACM |
171 | void perf_evlist__add(struct perf_evlist *evlist, struct perf_evsel *entry) |
172 | { | |
d49e4695 | 173 | entry->evlist = evlist; |
361c99a6 | 174 | list_add_tail(&entry->node, &evlist->entries); |
ef503831 | 175 | entry->idx = evlist->nr_entries; |
60b0896c | 176 | entry->tracking = !entry->idx; |
ef503831 | 177 | |
75562573 AH |
178 | if (!evlist->nr_entries++) |
179 | perf_evlist__set_id_pos(evlist); | |
44c42d71 AH |
180 | |
181 | __perf_evlist__propagate_maps(evlist, entry); | |
361c99a6 ACM |
182 | } |
183 | ||
4768230a AH |
184 | void perf_evlist__remove(struct perf_evlist *evlist, struct perf_evsel *evsel) |
185 | { | |
186 | evsel->evlist = NULL; | |
187 | list_del_init(&evsel->node); | |
188 | evlist->nr_entries -= 1; | |
189 | } | |
190 | ||
0529bc1f | 191 | void perf_evlist__splice_list_tail(struct perf_evlist *evlist, |
f114d6ef | 192 | struct list_head *list) |
50d08e47 | 193 | { |
f114d6ef | 194 | struct perf_evsel *evsel, *temp; |
75562573 | 195 | |
e5cadb93 | 196 | __evlist__for_each_entry_safe(list, temp, evsel) { |
f114d6ef AH |
197 | list_del_init(&evsel->node); |
198 | perf_evlist__add(evlist, evsel); | |
199 | } | |
50d08e47 ACM |
200 | } |
201 | ||
63dab225 ACM |
202 | void __perf_evlist__set_leader(struct list_head *list) |
203 | { | |
204 | struct perf_evsel *evsel, *leader; | |
205 | ||
206 | leader = list_entry(list->next, struct perf_evsel, node); | |
97f63e4a NK |
207 | evsel = list_entry(list->prev, struct perf_evsel, node); |
208 | ||
209 | leader->nr_members = evsel->idx - leader->idx + 1; | |
63dab225 | 210 | |
e5cadb93 | 211 | __evlist__for_each_entry(list, evsel) { |
74b2133d | 212 | evsel->leader = leader; |
63dab225 ACM |
213 | } |
214 | } | |
215 | ||
216 | void perf_evlist__set_leader(struct perf_evlist *evlist) | |
6a4bb04c | 217 | { |
97f63e4a NK |
218 | if (evlist->nr_entries) { |
219 | evlist->nr_groups = evlist->nr_entries > 1 ? 1 : 0; | |
63dab225 | 220 | __perf_evlist__set_leader(&evlist->entries); |
97f63e4a | 221 | } |
6a4bb04c JO |
222 | } |
223 | ||
45cf6c33 | 224 | void perf_event_attr__set_max_precise_ip(struct perf_event_attr *attr) |
7f8d1ade ACM |
225 | { |
226 | attr->precise_ip = 3; | |
227 | ||
228 | while (attr->precise_ip != 0) { | |
229 | int fd = sys_perf_event_open(attr, 0, -1, -1, 0); | |
230 | if (fd != -1) { | |
231 | close(fd); | |
232 | break; | |
233 | } | |
234 | --attr->precise_ip; | |
235 | } | |
236 | } | |
237 | ||
361c99a6 ACM |
238 | int perf_evlist__add_default(struct perf_evlist *evlist) |
239 | { | |
240 | struct perf_event_attr attr = { | |
241 | .type = PERF_TYPE_HARDWARE, | |
242 | .config = PERF_COUNT_HW_CPU_CYCLES, | |
243 | }; | |
1aed2671 JR |
244 | struct perf_evsel *evsel; |
245 | ||
246 | event_attr_init(&attr); | |
361c99a6 | 247 | |
7f8d1ade ACM |
248 | perf_event_attr__set_max_precise_ip(&attr); |
249 | ||
ef503831 | 250 | evsel = perf_evsel__new(&attr); |
361c99a6 | 251 | if (evsel == NULL) |
cc2d86b0 SE |
252 | goto error; |
253 | ||
7f8d1ade ACM |
254 | /* use asprintf() because free(evsel) assumes name is allocated */ |
255 | if (asprintf(&evsel->name, "cycles%.*s", | |
256 | attr.precise_ip ? attr.precise_ip + 1 : 0, ":ppp") < 0) | |
cc2d86b0 | 257 | goto error_free; |
361c99a6 ACM |
258 | |
259 | perf_evlist__add(evlist, evsel); | |
260 | return 0; | |
cc2d86b0 SE |
261 | error_free: |
262 | perf_evsel__delete(evsel); | |
263 | error: | |
264 | return -ENOMEM; | |
361c99a6 | 265 | } |
5c581041 | 266 | |
5bae0250 ACM |
267 | int perf_evlist__add_dummy(struct perf_evlist *evlist) |
268 | { | |
269 | struct perf_event_attr attr = { | |
270 | .type = PERF_TYPE_SOFTWARE, | |
271 | .config = PERF_COUNT_SW_DUMMY, | |
272 | .size = sizeof(attr), /* to capture ABI version */ | |
273 | }; | |
274 | struct perf_evsel *evsel = perf_evsel__new(&attr); | |
275 | ||
276 | if (evsel == NULL) | |
277 | return -ENOMEM; | |
278 | ||
279 | perf_evlist__add(evlist, evsel); | |
280 | return 0; | |
281 | } | |
282 | ||
e60fc847 ACM |
283 | static int perf_evlist__add_attrs(struct perf_evlist *evlist, |
284 | struct perf_event_attr *attrs, size_t nr_attrs) | |
50d08e47 ACM |
285 | { |
286 | struct perf_evsel *evsel, *n; | |
287 | LIST_HEAD(head); | |
288 | size_t i; | |
289 | ||
290 | for (i = 0; i < nr_attrs; i++) { | |
ef503831 | 291 | evsel = perf_evsel__new_idx(attrs + i, evlist->nr_entries + i); |
50d08e47 ACM |
292 | if (evsel == NULL) |
293 | goto out_delete_partial_list; | |
294 | list_add_tail(&evsel->node, &head); | |
295 | } | |
296 | ||
f114d6ef | 297 | perf_evlist__splice_list_tail(evlist, &head); |
50d08e47 ACM |
298 | |
299 | return 0; | |
300 | ||
301 | out_delete_partial_list: | |
e5cadb93 | 302 | __evlist__for_each_entry_safe(&head, n, evsel) |
50d08e47 ACM |
303 | perf_evsel__delete(evsel); |
304 | return -1; | |
305 | } | |
306 | ||
79695e1b ACM |
307 | int __perf_evlist__add_default_attrs(struct perf_evlist *evlist, |
308 | struct perf_event_attr *attrs, size_t nr_attrs) | |
309 | { | |
310 | size_t i; | |
311 | ||
312 | for (i = 0; i < nr_attrs; i++) | |
313 | event_attr_init(attrs + i); | |
314 | ||
315 | return perf_evlist__add_attrs(evlist, attrs, nr_attrs); | |
316 | } | |
317 | ||
da378962 ACM |
318 | struct perf_evsel * |
319 | perf_evlist__find_tracepoint_by_id(struct perf_evlist *evlist, int id) | |
ee29be62 ACM |
320 | { |
321 | struct perf_evsel *evsel; | |
322 | ||
e5cadb93 | 323 | evlist__for_each_entry(evlist, evsel) { |
ee29be62 ACM |
324 | if (evsel->attr.type == PERF_TYPE_TRACEPOINT && |
325 | (int)evsel->attr.config == id) | |
326 | return evsel; | |
327 | } | |
328 | ||
329 | return NULL; | |
330 | } | |
331 | ||
a2f2804a DA |
332 | struct perf_evsel * |
333 | perf_evlist__find_tracepoint_by_name(struct perf_evlist *evlist, | |
334 | const char *name) | |
335 | { | |
336 | struct perf_evsel *evsel; | |
337 | ||
e5cadb93 | 338 | evlist__for_each_entry(evlist, evsel) { |
a2f2804a DA |
339 | if ((evsel->attr.type == PERF_TYPE_TRACEPOINT) && |
340 | (strcmp(evsel->name, name) == 0)) | |
341 | return evsel; | |
342 | } | |
343 | ||
344 | return NULL; | |
345 | } | |
346 | ||
39876e7d ACM |
347 | int perf_evlist__add_newtp(struct perf_evlist *evlist, |
348 | const char *sys, const char *name, void *handler) | |
349 | { | |
ef503831 | 350 | struct perf_evsel *evsel = perf_evsel__newtp(sys, name); |
39876e7d | 351 | |
8dd2a131 | 352 | if (IS_ERR(evsel)) |
39876e7d ACM |
353 | return -1; |
354 | ||
744a9719 | 355 | evsel->handler = handler; |
39876e7d ACM |
356 | perf_evlist__add(evlist, evsel); |
357 | return 0; | |
358 | } | |
359 | ||
bf8e8f4b AH |
360 | static int perf_evlist__nr_threads(struct perf_evlist *evlist, |
361 | struct perf_evsel *evsel) | |
362 | { | |
363 | if (evsel->system_wide) | |
364 | return 1; | |
365 | else | |
366 | return thread_map__nr(evlist->threads); | |
367 | } | |
368 | ||
4152ab37 ACM |
369 | void perf_evlist__disable(struct perf_evlist *evlist) |
370 | { | |
4152ab37 | 371 | struct perf_evsel *pos; |
3e27c920 | 372 | |
e5cadb93 | 373 | evlist__for_each_entry(evlist, pos) { |
3e27c920 JO |
374 | if (!perf_evsel__is_group_leader(pos) || !pos->fd) |
375 | continue; | |
376 | perf_evsel__disable(pos); | |
4152ab37 | 377 | } |
2b56bcfb ACM |
378 | |
379 | evlist->enabled = false; | |
4152ab37 ACM |
380 | } |
381 | ||
764e16a3 DA |
382 | void perf_evlist__enable(struct perf_evlist *evlist) |
383 | { | |
764e16a3 | 384 | struct perf_evsel *pos; |
3e27c920 | 385 | |
e5cadb93 | 386 | evlist__for_each_entry(evlist, pos) { |
3e27c920 JO |
387 | if (!perf_evsel__is_group_leader(pos) || !pos->fd) |
388 | continue; | |
389 | perf_evsel__enable(pos); | |
764e16a3 | 390 | } |
2b56bcfb ACM |
391 | |
392 | evlist->enabled = true; | |
393 | } | |
394 | ||
395 | void perf_evlist__toggle_enable(struct perf_evlist *evlist) | |
396 | { | |
397 | (evlist->enabled ? perf_evlist__disable : perf_evlist__enable)(evlist); | |
764e16a3 DA |
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 | ||
e5cadb93 | 454 | evlist__for_each_entry(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 | |
f3058a1c | 468 | static int __perf_evlist__add_pollfd(struct perf_evlist *evlist, int fd, int idx, short revent) |
e4b356b5 | 469 | { |
f3058a1c | 470 | int pos = fdarray__add(&evlist->pollfd, fd, revent | POLLERR | POLLHUP); |
e4b356b5 ACM |
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 | { |
f3058a1c | 486 | return __perf_evlist__add_pollfd(evlist, fd, -1, POLLIN); |
e4b356b5 ACM |
487 | } |
488 | ||
258e4bfc WN |
489 | static void perf_evlist__munmap_filtered(struct fdarray *fda, int fd, |
490 | void *arg __maybe_unused) | |
e4b356b5 ACM |
491 | { |
492 | struct perf_evlist *evlist = container_of(fda, struct perf_evlist, pollfd); | |
1b85337d | 493 | |
e4b356b5 | 494 | perf_evlist__mmap_put(evlist, fda->priv[fd].idx); |
70082dd9 | 495 | } |
70db7533 | 496 | |
1ddec7f0 ACM |
497 | int perf_evlist__filter_pollfd(struct perf_evlist *evlist, short revents_and_mask) |
498 | { | |
e4b356b5 | 499 | return fdarray__filter(&evlist->pollfd, revents_and_mask, |
258e4bfc | 500 | perf_evlist__munmap_filtered, NULL); |
1ddec7f0 ACM |
501 | } |
502 | ||
f66a889d ACM |
503 | int perf_evlist__poll(struct perf_evlist *evlist, int timeout) |
504 | { | |
1b85337d | 505 | return fdarray__poll(&evlist->pollfd, timeout); |
f66a889d ACM |
506 | } |
507 | ||
a91e5431 ACM |
508 | static void perf_evlist__id_hash(struct perf_evlist *evlist, |
509 | struct perf_evsel *evsel, | |
510 | int cpu, int thread, u64 id) | |
3d3b5e95 ACM |
511 | { |
512 | int hash; | |
513 | struct perf_sample_id *sid = SID(evsel, cpu, thread); | |
514 | ||
515 | sid->id = id; | |
516 | sid->evsel = evsel; | |
517 | hash = hash_64(sid->id, PERF_EVLIST__HLIST_BITS); | |
518 | hlist_add_head(&sid->node, &evlist->heads[hash]); | |
519 | } | |
520 | ||
a91e5431 ACM |
521 | void perf_evlist__id_add(struct perf_evlist *evlist, struct perf_evsel *evsel, |
522 | int cpu, int thread, u64 id) | |
523 | { | |
524 | perf_evlist__id_hash(evlist, evsel, cpu, thread, id); | |
525 | evsel->id[evsel->ids++] = id; | |
526 | } | |
527 | ||
1c59612d JO |
528 | int perf_evlist__id_add_fd(struct perf_evlist *evlist, |
529 | struct perf_evsel *evsel, | |
530 | int cpu, int thread, int fd) | |
f8a95309 | 531 | { |
f8a95309 | 532 | u64 read_data[4] = { 0, }; |
3d3b5e95 | 533 | int id_idx = 1; /* The first entry is the counter value */ |
e2b5abe0 JO |
534 | u64 id; |
535 | int ret; | |
536 | ||
537 | ret = ioctl(fd, PERF_EVENT_IOC_ID, &id); | |
538 | if (!ret) | |
539 | goto add; | |
540 | ||
541 | if (errno != ENOTTY) | |
542 | return -1; | |
543 | ||
544 | /* Legacy way to get event id.. All hail to old kernels! */ | |
f8a95309 | 545 | |
c4861afe JO |
546 | /* |
547 | * This way does not work with group format read, so bail | |
548 | * out in that case. | |
549 | */ | |
550 | if (perf_evlist__read_format(evlist) & PERF_FORMAT_GROUP) | |
551 | return -1; | |
552 | ||
f8a95309 ACM |
553 | if (!(evsel->attr.read_format & PERF_FORMAT_ID) || |
554 | read(fd, &read_data, sizeof(read_data)) == -1) | |
555 | return -1; | |
556 | ||
557 | if (evsel->attr.read_format & PERF_FORMAT_TOTAL_TIME_ENABLED) | |
558 | ++id_idx; | |
559 | if (evsel->attr.read_format & PERF_FORMAT_TOTAL_TIME_RUNNING) | |
560 | ++id_idx; | |
561 | ||
e2b5abe0 JO |
562 | id = read_data[id_idx]; |
563 | ||
564 | add: | |
565 | perf_evlist__id_add(evlist, evsel, cpu, thread, id); | |
f8a95309 ACM |
566 | return 0; |
567 | } | |
568 | ||
3c659eed AH |
569 | static void perf_evlist__set_sid_idx(struct perf_evlist *evlist, |
570 | struct perf_evsel *evsel, int idx, int cpu, | |
571 | int thread) | |
572 | { | |
573 | struct perf_sample_id *sid = SID(evsel, cpu, thread); | |
574 | sid->idx = idx; | |
575 | if (evlist->cpus && cpu >= 0) | |
576 | sid->cpu = evlist->cpus->map[cpu]; | |
577 | else | |
578 | sid->cpu = -1; | |
579 | if (!evsel->system_wide && evlist->threads && thread >= 0) | |
e13798c7 | 580 | sid->tid = thread_map__pid(evlist->threads, thread); |
3c659eed AH |
581 | else |
582 | sid->tid = -1; | |
583 | } | |
584 | ||
932a3594 | 585 | struct perf_sample_id *perf_evlist__id2sid(struct perf_evlist *evlist, u64 id) |
70db7533 ACM |
586 | { |
587 | struct hlist_head *head; | |
70db7533 ACM |
588 | struct perf_sample_id *sid; |
589 | int hash; | |
590 | ||
70db7533 ACM |
591 | hash = hash_64(id, PERF_EVLIST__HLIST_BITS); |
592 | head = &evlist->heads[hash]; | |
593 | ||
b67bfe0d | 594 | hlist_for_each_entry(sid, head, node) |
70db7533 | 595 | if (sid->id == id) |
932a3594 JO |
596 | return sid; |
597 | ||
598 | return NULL; | |
599 | } | |
600 | ||
601 | struct perf_evsel *perf_evlist__id2evsel(struct perf_evlist *evlist, u64 id) | |
602 | { | |
603 | struct perf_sample_id *sid; | |
604 | ||
05169df5 | 605 | if (evlist->nr_entries == 1 || !id) |
932a3594 JO |
606 | return perf_evlist__first(evlist); |
607 | ||
608 | sid = perf_evlist__id2sid(evlist, id); | |
609 | if (sid) | |
610 | return sid->evsel; | |
30e68bcc NK |
611 | |
612 | if (!perf_evlist__sample_id_all(evlist)) | |
0c21f736 | 613 | return perf_evlist__first(evlist); |
30e68bcc | 614 | |
70db7533 ACM |
615 | return NULL; |
616 | } | |
04391deb | 617 | |
dddcf6ab AH |
618 | struct perf_evsel *perf_evlist__id2evsel_strict(struct perf_evlist *evlist, |
619 | u64 id) | |
620 | { | |
621 | struct perf_sample_id *sid; | |
622 | ||
623 | if (!id) | |
624 | return NULL; | |
625 | ||
626 | sid = perf_evlist__id2sid(evlist, id); | |
627 | if (sid) | |
628 | return sid->evsel; | |
629 | ||
630 | return NULL; | |
631 | } | |
632 | ||
75562573 AH |
633 | static int perf_evlist__event2id(struct perf_evlist *evlist, |
634 | union perf_event *event, u64 *id) | |
635 | { | |
636 | const u64 *array = event->sample.array; | |
637 | ssize_t n; | |
638 | ||
639 | n = (event->header.size - sizeof(event->header)) >> 3; | |
640 | ||
641 | if (event->header.type == PERF_RECORD_SAMPLE) { | |
642 | if (evlist->id_pos >= n) | |
643 | return -1; | |
644 | *id = array[evlist->id_pos]; | |
645 | } else { | |
646 | if (evlist->is_pos > n) | |
647 | return -1; | |
648 | n -= evlist->is_pos; | |
649 | *id = array[n]; | |
650 | } | |
651 | return 0; | |
652 | } | |
653 | ||
7cb5c5ac JO |
654 | struct perf_evsel *perf_evlist__event2evsel(struct perf_evlist *evlist, |
655 | union perf_event *event) | |
75562573 | 656 | { |
98be6966 | 657 | struct perf_evsel *first = perf_evlist__first(evlist); |
75562573 AH |
658 | struct hlist_head *head; |
659 | struct perf_sample_id *sid; | |
660 | int hash; | |
661 | u64 id; | |
662 | ||
663 | if (evlist->nr_entries == 1) | |
98be6966 AH |
664 | return first; |
665 | ||
666 | if (!first->attr.sample_id_all && | |
667 | event->header.type != PERF_RECORD_SAMPLE) | |
668 | return first; | |
75562573 AH |
669 | |
670 | if (perf_evlist__event2id(evlist, event, &id)) | |
671 | return NULL; | |
672 | ||
673 | /* Synthesized events have an id of zero */ | |
674 | if (!id) | |
98be6966 | 675 | return first; |
75562573 AH |
676 | |
677 | hash = hash_64(id, PERF_EVLIST__HLIST_BITS); | |
678 | head = &evlist->heads[hash]; | |
679 | ||
680 | hlist_for_each_entry(sid, head, node) { | |
681 | if (sid->id == id) | |
682 | return sid->evsel; | |
683 | } | |
684 | return NULL; | |
685 | } | |
686 | ||
65aea233 WN |
687 | static int perf_evlist__set_paused(struct perf_evlist *evlist, bool value) |
688 | { | |
689 | int i; | |
690 | ||
691 | for (i = 0; i < evlist->nr_mmaps; i++) { | |
692 | int fd = evlist->mmap[i].fd; | |
693 | int err; | |
694 | ||
695 | if (fd < 0) | |
696 | continue; | |
697 | err = ioctl(fd, PERF_EVENT_IOC_PAUSE_OUTPUT, value ? 1 : 0); | |
698 | if (err) | |
699 | return err; | |
700 | } | |
701 | return 0; | |
702 | } | |
703 | ||
704 | int perf_evlist__pause(struct perf_evlist *evlist) | |
705 | { | |
706 | return perf_evlist__set_paused(evlist, true); | |
707 | } | |
708 | ||
709 | int perf_evlist__resume(struct perf_evlist *evlist) | |
710 | { | |
711 | return perf_evlist__set_paused(evlist, false); | |
712 | } | |
713 | ||
b6b85dad | 714 | /* When check_messup is true, 'end' must points to a good entry */ |
0f4ccd11 | 715 | static union perf_event * |
b6b85dad WN |
716 | perf_mmap__read(struct perf_mmap *md, bool check_messup, u64 start, |
717 | u64 end, u64 *prev) | |
04391deb | 718 | { |
04391deb | 719 | unsigned char *data = md->base + page_size; |
8115d60c | 720 | union perf_event *event = NULL; |
b6b85dad | 721 | int diff = end - start; |
04391deb | 722 | |
b6b85dad | 723 | if (check_messup) { |
04391deb | 724 | /* |
7bb41152 ACM |
725 | * If we're further behind than half the buffer, there's a chance |
726 | * the writer will bite our tail and mess up the samples under us. | |
727 | * | |
b6b85dad | 728 | * If we somehow ended up ahead of the 'end', we got messed up. |
7bb41152 | 729 | * |
b6b85dad | 730 | * In either case, truncate and restart at 'end'. |
04391deb | 731 | */ |
7bb41152 ACM |
732 | if (diff > md->mask / 2 || diff < 0) { |
733 | fprintf(stderr, "WARNING: failed to keep up with mmap data.\n"); | |
734 | ||
735 | /* | |
b6b85dad | 736 | * 'end' points to a known good entry, start there. |
7bb41152 | 737 | */ |
b6b85dad | 738 | start = end; |
b04b7023 | 739 | diff = 0; |
7bb41152 | 740 | } |
04391deb ACM |
741 | } |
742 | ||
b04b7023 | 743 | if (diff >= (int)sizeof(event->header)) { |
04391deb ACM |
744 | size_t size; |
745 | ||
b6b85dad | 746 | event = (union perf_event *)&data[start & md->mask]; |
04391deb ACM |
747 | size = event->header.size; |
748 | ||
b04b7023 WN |
749 | if (size < sizeof(event->header) || diff < (int)size) { |
750 | event = NULL; | |
751 | goto broken_event; | |
752 | } | |
753 | ||
04391deb ACM |
754 | /* |
755 | * Event straddles the mmap boundary -- header should always | |
756 | * be inside due to u64 alignment of output. | |
757 | */ | |
b6b85dad WN |
758 | if ((start & md->mask) + size != ((start + size) & md->mask)) { |
759 | unsigned int offset = start; | |
04391deb | 760 | unsigned int len = min(sizeof(*event), size), cpy; |
a65cb4b9 | 761 | void *dst = md->event_copy; |
04391deb ACM |
762 | |
763 | do { | |
764 | cpy = min(md->mask + 1 - (offset & md->mask), len); | |
765 | memcpy(dst, &data[offset & md->mask], cpy); | |
766 | offset += cpy; | |
767 | dst += cpy; | |
768 | len -= cpy; | |
769 | } while (len); | |
770 | ||
a65cb4b9 | 771 | event = (union perf_event *) md->event_copy; |
04391deb ACM |
772 | } |
773 | ||
b6b85dad | 774 | start += size; |
04391deb ACM |
775 | } |
776 | ||
b04b7023 | 777 | broken_event: |
0f4ccd11 | 778 | if (prev) |
b6b85dad | 779 | *prev = start; |
7bb41152 | 780 | |
04391deb ACM |
781 | return event; |
782 | } | |
f8a95309 | 783 | |
5a5ddeb6 | 784 | union perf_event *perf_evlist__mmap_read_forward(struct perf_evlist *evlist, int idx) |
0f4ccd11 WN |
785 | { |
786 | struct perf_mmap *md = &evlist->mmap[idx]; | |
787 | u64 head; | |
788 | u64 old = md->prev; | |
789 | ||
790 | /* | |
791 | * Check if event was unmapped due to a POLLHUP/POLLERR. | |
792 | */ | |
793 | if (!atomic_read(&md->refcnt)) | |
794 | return NULL; | |
795 | ||
796 | head = perf_mmap__read_head(md); | |
797 | ||
b6b85dad | 798 | return perf_mmap__read(md, evlist->overwrite, old, head, &md->prev); |
0f4ccd11 WN |
799 | } |
800 | ||
e24c7520 WN |
801 | union perf_event * |
802 | perf_evlist__mmap_read_backward(struct perf_evlist *evlist, int idx) | |
803 | { | |
804 | struct perf_mmap *md = &evlist->mmap[idx]; | |
805 | u64 head, end; | |
806 | u64 start = md->prev; | |
807 | ||
808 | /* | |
809 | * Check if event was unmapped due to a POLLHUP/POLLERR. | |
810 | */ | |
811 | if (!atomic_read(&md->refcnt)) | |
812 | return NULL; | |
813 | ||
814 | head = perf_mmap__read_head(md); | |
815 | if (!head) | |
816 | return NULL; | |
817 | ||
818 | /* | |
819 | * 'head' pointer starts from 0. Kernel minus sizeof(record) form | |
820 | * it each time when kernel writes to it, so in fact 'head' is | |
821 | * negative. 'end' pointer is made manually by adding the size of | |
822 | * the ring buffer to 'head' pointer, means the validate data can | |
823 | * read is the whole ring buffer. If 'end' is positive, the ring | |
824 | * buffer has not fully filled, so we must adjust 'end' to 0. | |
825 | * | |
826 | * However, since both 'head' and 'end' is unsigned, we can't | |
827 | * simply compare 'end' against 0. Here we compare '-head' and | |
828 | * the size of the ring buffer, where -head is the number of bytes | |
829 | * kernel write to the ring buffer. | |
830 | */ | |
831 | if (-head < (u64)(md->mask + 1)) | |
832 | end = 0; | |
833 | else | |
834 | end = head + md->mask + 1; | |
835 | ||
836 | return perf_mmap__read(md, false, start, end, &md->prev); | |
837 | } | |
838 | ||
5a5ddeb6 WN |
839 | union perf_event *perf_evlist__mmap_read(struct perf_evlist *evlist, int idx) |
840 | { | |
841 | if (!evlist->backward) | |
842 | return perf_evlist__mmap_read_forward(evlist, idx); | |
843 | return perf_evlist__mmap_read_backward(evlist, idx); | |
844 | } | |
845 | ||
e24c7520 WN |
846 | void perf_evlist__mmap_read_catchup(struct perf_evlist *evlist, int idx) |
847 | { | |
848 | struct perf_mmap *md = &evlist->mmap[idx]; | |
849 | u64 head; | |
850 | ||
851 | if (!atomic_read(&md->refcnt)) | |
852 | return; | |
853 | ||
854 | head = perf_mmap__read_head(md); | |
855 | md->prev = head; | |
856 | } | |
857 | ||
82396986 ACM |
858 | static bool perf_mmap__empty(struct perf_mmap *md) |
859 | { | |
b72e74d1 | 860 | return perf_mmap__read_head(md) == md->prev && !md->auxtrace_mmap.base; |
82396986 ACM |
861 | } |
862 | ||
863 | static void perf_evlist__mmap_get(struct perf_evlist *evlist, int idx) | |
864 | { | |
7143849a | 865 | atomic_inc(&evlist->mmap[idx].refcnt); |
82396986 ACM |
866 | } |
867 | ||
868 | static void perf_evlist__mmap_put(struct perf_evlist *evlist, int idx) | |
869 | { | |
e10e4ef6 WN |
870 | struct perf_mmap *md = &evlist->mmap[idx]; |
871 | ||
872 | BUG_ON(md->base && atomic_read(&md->refcnt) == 0); | |
82396986 | 873 | |
e10e4ef6 | 874 | if (atomic_dec_and_test(&md->refcnt)) |
82396986 ACM |
875 | __perf_evlist__munmap(evlist, idx); |
876 | } | |
877 | ||
8e50d384 ZZ |
878 | void perf_evlist__mmap_consume(struct perf_evlist *evlist, int idx) |
879 | { | |
82396986 ACM |
880 | struct perf_mmap *md = &evlist->mmap[idx]; |
881 | ||
8e50d384 | 882 | if (!evlist->overwrite) { |
7b8283b5 | 883 | u64 old = md->prev; |
8e50d384 ZZ |
884 | |
885 | perf_mmap__write_tail(md, old); | |
886 | } | |
82396986 | 887 | |
7143849a | 888 | if (atomic_read(&md->refcnt) == 1 && perf_mmap__empty(md)) |
82396986 | 889 | perf_evlist__mmap_put(evlist, idx); |
8e50d384 ZZ |
890 | } |
891 | ||
718c602d AH |
892 | int __weak auxtrace_mmap__mmap(struct auxtrace_mmap *mm __maybe_unused, |
893 | struct auxtrace_mmap_params *mp __maybe_unused, | |
894 | void *userpg __maybe_unused, | |
895 | int fd __maybe_unused) | |
896 | { | |
897 | return 0; | |
898 | } | |
899 | ||
900 | void __weak auxtrace_mmap__munmap(struct auxtrace_mmap *mm __maybe_unused) | |
901 | { | |
902 | } | |
903 | ||
904 | void __weak auxtrace_mmap_params__init( | |
905 | struct auxtrace_mmap_params *mp __maybe_unused, | |
906 | off_t auxtrace_offset __maybe_unused, | |
907 | unsigned int auxtrace_pages __maybe_unused, | |
908 | bool auxtrace_overwrite __maybe_unused) | |
909 | { | |
910 | } | |
911 | ||
912 | void __weak auxtrace_mmap_params__set_idx( | |
913 | struct auxtrace_mmap_params *mp __maybe_unused, | |
914 | struct perf_evlist *evlist __maybe_unused, | |
915 | int idx __maybe_unused, | |
916 | bool per_cpu __maybe_unused) | |
917 | { | |
918 | } | |
919 | ||
93edcbd9 AH |
920 | static void __perf_evlist__munmap(struct perf_evlist *evlist, int idx) |
921 | { | |
922 | if (evlist->mmap[idx].base != NULL) { | |
923 | munmap(evlist->mmap[idx].base, evlist->mmap_len); | |
924 | evlist->mmap[idx].base = NULL; | |
d4c6fb36 | 925 | evlist->mmap[idx].fd = -1; |
7143849a | 926 | atomic_set(&evlist->mmap[idx].refcnt, 0); |
93edcbd9 | 927 | } |
718c602d | 928 | auxtrace_mmap__munmap(&evlist->mmap[idx].auxtrace_mmap); |
93edcbd9 AH |
929 | } |
930 | ||
7e2ed097 | 931 | void perf_evlist__munmap(struct perf_evlist *evlist) |
f8a95309 | 932 | { |
aece948f | 933 | int i; |
f8a95309 | 934 | |
983874d1 ACM |
935 | if (evlist->mmap == NULL) |
936 | return; | |
937 | ||
93edcbd9 AH |
938 | for (i = 0; i < evlist->nr_mmaps; i++) |
939 | __perf_evlist__munmap(evlist, i); | |
aece948f | 940 | |
04662523 | 941 | zfree(&evlist->mmap); |
f8a95309 ACM |
942 | } |
943 | ||
806fb630 | 944 | static int perf_evlist__alloc_mmap(struct perf_evlist *evlist) |
f8a95309 | 945 | { |
d4c6fb36 WN |
946 | int i; |
947 | ||
a14bb7a6 | 948 | evlist->nr_mmaps = cpu_map__nr(evlist->cpus); |
ec1e7e43 | 949 | if (cpu_map__empty(evlist->cpus)) |
b3a319d5 | 950 | evlist->nr_mmaps = thread_map__nr(evlist->threads); |
aece948f | 951 | evlist->mmap = zalloc(evlist->nr_mmaps * sizeof(struct perf_mmap)); |
946ae1d4 WN |
952 | if (!evlist->mmap) |
953 | return -ENOMEM; | |
954 | ||
d4c6fb36 WN |
955 | for (i = 0; i < evlist->nr_mmaps; i++) |
956 | evlist->mmap[i].fd = -1; | |
946ae1d4 | 957 | return 0; |
f8a95309 ACM |
958 | } |
959 | ||
a8a8f3eb AH |
960 | struct mmap_params { |
961 | int prot; | |
962 | int mask; | |
718c602d | 963 | struct auxtrace_mmap_params auxtrace_mp; |
a8a8f3eb AH |
964 | }; |
965 | ||
966 | static int __perf_evlist__mmap(struct perf_evlist *evlist, int idx, | |
967 | struct mmap_params *mp, int fd) | |
f8a95309 | 968 | { |
82396986 ACM |
969 | /* |
970 | * The last one will be done at perf_evlist__mmap_consume(), so that we | |
971 | * make sure we don't prevent tools from consuming every last event in | |
972 | * the ring buffer. | |
973 | * | |
974 | * I.e. we can get the POLLHUP meaning that the fd doesn't exist | |
975 | * anymore, but the last events for it are still in the ring buffer, | |
976 | * waiting to be consumed. | |
977 | * | |
978 | * Tools can chose to ignore this at their own discretion, but the | |
979 | * evlist layer can't just drop it when filtering events in | |
980 | * perf_evlist__filter_pollfd(). | |
981 | */ | |
7143849a | 982 | atomic_set(&evlist->mmap[idx].refcnt, 2); |
aece948f | 983 | evlist->mmap[idx].prev = 0; |
a8a8f3eb AH |
984 | evlist->mmap[idx].mask = mp->mask; |
985 | evlist->mmap[idx].base = mmap(NULL, evlist->mmap_len, mp->prot, | |
f8a95309 | 986 | MAP_SHARED, fd, 0); |
301b195d | 987 | if (evlist->mmap[idx].base == MAP_FAILED) { |
02635965 AH |
988 | pr_debug2("failed to mmap perf event ring buffer, error %d\n", |
989 | errno); | |
301b195d | 990 | evlist->mmap[idx].base = NULL; |
f8a95309 | 991 | return -1; |
301b195d | 992 | } |
d4c6fb36 | 993 | evlist->mmap[idx].fd = fd; |
ad6765dd | 994 | |
718c602d AH |
995 | if (auxtrace_mmap__mmap(&evlist->mmap[idx].auxtrace_mmap, |
996 | &mp->auxtrace_mp, evlist->mmap[idx].base, fd)) | |
997 | return -1; | |
998 | ||
f8a95309 ACM |
999 | return 0; |
1000 | } | |
1001 | ||
f3058a1c WN |
1002 | static bool |
1003 | perf_evlist__should_poll(struct perf_evlist *evlist __maybe_unused, | |
1004 | struct perf_evsel *evsel) | |
1005 | { | |
1006 | if (evsel->overwrite) | |
1007 | return false; | |
1008 | return true; | |
1009 | } | |
1010 | ||
04e21314 | 1011 | static int perf_evlist__mmap_per_evsel(struct perf_evlist *evlist, int idx, |
a8a8f3eb AH |
1012 | struct mmap_params *mp, int cpu, |
1013 | int thread, int *output) | |
aece948f ACM |
1014 | { |
1015 | struct perf_evsel *evsel; | |
f3058a1c | 1016 | int revent; |
04e21314 | 1017 | |
e5cadb93 | 1018 | evlist__for_each_entry(evlist, evsel) { |
bf8e8f4b AH |
1019 | int fd; |
1020 | ||
f3058a1c WN |
1021 | if (evsel->overwrite != (evlist->overwrite && evlist->backward)) |
1022 | continue; | |
1023 | ||
bf8e8f4b AH |
1024 | if (evsel->system_wide && thread) |
1025 | continue; | |
1026 | ||
1027 | fd = FD(evsel, cpu, thread); | |
04e21314 AH |
1028 | |
1029 | if (*output == -1) { | |
1030 | *output = fd; | |
a8a8f3eb | 1031 | if (__perf_evlist__mmap(evlist, idx, mp, *output) < 0) |
04e21314 AH |
1032 | return -1; |
1033 | } else { | |
1034 | if (ioctl(fd, PERF_EVENT_IOC_SET_OUTPUT, *output) != 0) | |
1035 | return -1; | |
82396986 ACM |
1036 | |
1037 | perf_evlist__mmap_get(evlist, idx); | |
04e21314 AH |
1038 | } |
1039 | ||
f3058a1c WN |
1040 | revent = perf_evlist__should_poll(evlist, evsel) ? POLLIN : 0; |
1041 | ||
f90d194a AH |
1042 | /* |
1043 | * The system_wide flag causes a selected event to be opened | |
1044 | * always without a pid. Consequently it will never get a | |
1045 | * POLLHUP, but it is used for tracking in combination with | |
1046 | * other events, so it should not need to be polled anyway. | |
1047 | * Therefore don't add it for polling. | |
1048 | */ | |
1049 | if (!evsel->system_wide && | |
f3058a1c | 1050 | __perf_evlist__add_pollfd(evlist, fd, idx, revent) < 0) { |
82396986 | 1051 | perf_evlist__mmap_put(evlist, idx); |
ad6765dd | 1052 | return -1; |
82396986 | 1053 | } |
033fa713 | 1054 | |
3c659eed AH |
1055 | if (evsel->attr.read_format & PERF_FORMAT_ID) { |
1056 | if (perf_evlist__id_add_fd(evlist, evsel, cpu, thread, | |
1057 | fd) < 0) | |
1058 | return -1; | |
1059 | perf_evlist__set_sid_idx(evlist, evsel, idx, cpu, | |
1060 | thread); | |
1061 | } | |
04e21314 AH |
1062 | } |
1063 | ||
1064 | return 0; | |
1065 | } | |
1066 | ||
a8a8f3eb AH |
1067 | static int perf_evlist__mmap_per_cpu(struct perf_evlist *evlist, |
1068 | struct mmap_params *mp) | |
04e21314 | 1069 | { |
aece948f | 1070 | int cpu, thread; |
b3a319d5 NK |
1071 | int nr_cpus = cpu_map__nr(evlist->cpus); |
1072 | int nr_threads = thread_map__nr(evlist->threads); | |
aece948f | 1073 | |
e3e1a54f | 1074 | pr_debug2("perf event ring buffer mmapped per cpu\n"); |
b3a319d5 | 1075 | for (cpu = 0; cpu < nr_cpus; cpu++) { |
aece948f ACM |
1076 | int output = -1; |
1077 | ||
718c602d AH |
1078 | auxtrace_mmap_params__set_idx(&mp->auxtrace_mp, evlist, cpu, |
1079 | true); | |
1080 | ||
b3a319d5 | 1081 | for (thread = 0; thread < nr_threads; thread++) { |
a8a8f3eb AH |
1082 | if (perf_evlist__mmap_per_evsel(evlist, cpu, mp, cpu, |
1083 | thread, &output)) | |
04e21314 | 1084 | goto out_unmap; |
aece948f ACM |
1085 | } |
1086 | } | |
1087 | ||
1088 | return 0; | |
1089 | ||
1090 | out_unmap: | |
93edcbd9 AH |
1091 | for (cpu = 0; cpu < nr_cpus; cpu++) |
1092 | __perf_evlist__munmap(evlist, cpu); | |
aece948f ACM |
1093 | return -1; |
1094 | } | |
1095 | ||
a8a8f3eb AH |
1096 | static int perf_evlist__mmap_per_thread(struct perf_evlist *evlist, |
1097 | struct mmap_params *mp) | |
aece948f | 1098 | { |
aece948f | 1099 | int thread; |
b3a319d5 | 1100 | int nr_threads = thread_map__nr(evlist->threads); |
aece948f | 1101 | |
e3e1a54f | 1102 | pr_debug2("perf event ring buffer mmapped per thread\n"); |
b3a319d5 | 1103 | for (thread = 0; thread < nr_threads; thread++) { |
aece948f ACM |
1104 | int output = -1; |
1105 | ||
718c602d AH |
1106 | auxtrace_mmap_params__set_idx(&mp->auxtrace_mp, evlist, thread, |
1107 | false); | |
1108 | ||
a8a8f3eb AH |
1109 | if (perf_evlist__mmap_per_evsel(evlist, thread, mp, 0, thread, |
1110 | &output)) | |
04e21314 | 1111 | goto out_unmap; |
aece948f ACM |
1112 | } |
1113 | ||
1114 | return 0; | |
1115 | ||
1116 | out_unmap: | |
93edcbd9 AH |
1117 | for (thread = 0; thread < nr_threads; thread++) |
1118 | __perf_evlist__munmap(evlist, thread); | |
aece948f ACM |
1119 | return -1; |
1120 | } | |
1121 | ||
f5e7150c | 1122 | unsigned long perf_event_mlock_kb_in_pages(void) |
994a1f78 | 1123 | { |
f5e7150c ACM |
1124 | unsigned long pages; |
1125 | int max; | |
8185e881 | 1126 | |
f5e7150c ACM |
1127 | if (sysctl__read_int("kernel/perf_event_mlock_kb", &max) < 0) { |
1128 | /* | |
1129 | * Pick a once upon a time good value, i.e. things look | |
1130 | * strange since we can't read a sysctl value, but lets not | |
1131 | * die yet... | |
1132 | */ | |
1133 | max = 512; | |
1134 | } else { | |
1135 | max -= (page_size / 1024); | |
1136 | } | |
8185e881 | 1137 | |
f5e7150c ACM |
1138 | pages = (max * 1024) / page_size; |
1139 | if (!is_power_of_2(pages)) | |
1140 | pages = rounddown_pow_of_two(pages); | |
1141 | ||
1142 | return pages; | |
1143 | } | |
1144 | ||
1145 | static size_t perf_evlist__mmap_size(unsigned long pages) | |
1146 | { | |
1147 | if (pages == UINT_MAX) | |
1148 | pages = perf_event_mlock_kb_in_pages(); | |
1149 | else if (!is_power_of_2(pages)) | |
994a1f78 JO |
1150 | return 0; |
1151 | ||
1152 | return (pages + 1) * page_size; | |
1153 | } | |
1154 | ||
33c2dcfd DA |
1155 | static long parse_pages_arg(const char *str, unsigned long min, |
1156 | unsigned long max) | |
994a1f78 | 1157 | { |
2fbe4abe | 1158 | unsigned long pages, val; |
27050f53 JO |
1159 | static struct parse_tag tags[] = { |
1160 | { .tag = 'B', .mult = 1 }, | |
1161 | { .tag = 'K', .mult = 1 << 10 }, | |
1162 | { .tag = 'M', .mult = 1 << 20 }, | |
1163 | { .tag = 'G', .mult = 1 << 30 }, | |
1164 | { .tag = 0 }, | |
1165 | }; | |
994a1f78 | 1166 | |
8973504b | 1167 | if (str == NULL) |
33c2dcfd | 1168 | return -EINVAL; |
8973504b | 1169 | |
27050f53 | 1170 | val = parse_tag_value(str, tags); |
2fbe4abe | 1171 | if (val != (unsigned long) -1) { |
27050f53 JO |
1172 | /* we got file size value */ |
1173 | pages = PERF_ALIGN(val, page_size) / page_size; | |
27050f53 JO |
1174 | } else { |
1175 | /* we got pages count value */ | |
1176 | char *eptr; | |
1177 | pages = strtoul(str, &eptr, 10); | |
33c2dcfd DA |
1178 | if (*eptr != '\0') |
1179 | return -EINVAL; | |
994a1f78 JO |
1180 | } |
1181 | ||
2bcab6c1 | 1182 | if (pages == 0 && min == 0) { |
33c2dcfd | 1183 | /* leave number of pages at 0 */ |
1dbfa938 | 1184 | } else if (!is_power_of_2(pages)) { |
33c2dcfd | 1185 | /* round pages up to next power of 2 */ |
91529834 | 1186 | pages = roundup_pow_of_two(pages); |
1dbfa938 AH |
1187 | if (!pages) |
1188 | return -EINVAL; | |
9639837e DA |
1189 | pr_info("rounding mmap pages size to %lu bytes (%lu pages)\n", |
1190 | pages * page_size, pages); | |
2fbe4abe AH |
1191 | } |
1192 | ||
33c2dcfd DA |
1193 | if (pages > max) |
1194 | return -EINVAL; | |
1195 | ||
1196 | return pages; | |
1197 | } | |
1198 | ||
e9db1310 | 1199 | int __perf_evlist__parse_mmap_pages(unsigned int *mmap_pages, const char *str) |
33c2dcfd | 1200 | { |
33c2dcfd DA |
1201 | unsigned long max = UINT_MAX; |
1202 | long pages; | |
1203 | ||
f5ae9c42 | 1204 | if (max > SIZE_MAX / page_size) |
33c2dcfd DA |
1205 | max = SIZE_MAX / page_size; |
1206 | ||
1207 | pages = parse_pages_arg(str, 1, max); | |
1208 | if (pages < 0) { | |
1209 | pr_err("Invalid argument for --mmap_pages/-m\n"); | |
994a1f78 JO |
1210 | return -1; |
1211 | } | |
1212 | ||
1213 | *mmap_pages = pages; | |
1214 | return 0; | |
1215 | } | |
1216 | ||
e9db1310 AH |
1217 | int perf_evlist__parse_mmap_pages(const struct option *opt, const char *str, |
1218 | int unset __maybe_unused) | |
1219 | { | |
1220 | return __perf_evlist__parse_mmap_pages(opt->value, str); | |
1221 | } | |
1222 | ||
c83fa7f2 | 1223 | /** |
718c602d | 1224 | * perf_evlist__mmap_ex - Create mmaps to receive events. |
c83fa7f2 AH |
1225 | * @evlist: list of events |
1226 | * @pages: map length in pages | |
1227 | * @overwrite: overwrite older events? | |
718c602d AH |
1228 | * @auxtrace_pages - auxtrace map length in pages |
1229 | * @auxtrace_overwrite - overwrite older auxtrace data? | |
f8a95309 | 1230 | * |
c83fa7f2 AH |
1231 | * If @overwrite is %false the user needs to signal event consumption using |
1232 | * perf_mmap__write_tail(). Using perf_evlist__mmap_read() does this | |
1233 | * automatically. | |
7e2ed097 | 1234 | * |
718c602d AH |
1235 | * Similarly, if @auxtrace_overwrite is %false the user needs to signal data |
1236 | * consumption using auxtrace_mmap__write_tail(). | |
1237 | * | |
c83fa7f2 | 1238 | * Return: %0 on success, negative error code otherwise. |
f8a95309 | 1239 | */ |
718c602d AH |
1240 | int perf_evlist__mmap_ex(struct perf_evlist *evlist, unsigned int pages, |
1241 | bool overwrite, unsigned int auxtrace_pages, | |
1242 | bool auxtrace_overwrite) | |
f8a95309 | 1243 | { |
aece948f | 1244 | struct perf_evsel *evsel; |
7e2ed097 ACM |
1245 | const struct cpu_map *cpus = evlist->cpus; |
1246 | const struct thread_map *threads = evlist->threads; | |
a8a8f3eb AH |
1247 | struct mmap_params mp = { |
1248 | .prot = PROT_READ | (overwrite ? 0 : PROT_WRITE), | |
1249 | }; | |
50a682ce | 1250 | |
7e2ed097 | 1251 | if (evlist->mmap == NULL && perf_evlist__alloc_mmap(evlist) < 0) |
f8a95309 ACM |
1252 | return -ENOMEM; |
1253 | ||
1b85337d | 1254 | if (evlist->pollfd.entries == NULL && perf_evlist__alloc_pollfd(evlist) < 0) |
f8a95309 ACM |
1255 | return -ENOMEM; |
1256 | ||
1257 | evlist->overwrite = overwrite; | |
994a1f78 | 1258 | evlist->mmap_len = perf_evlist__mmap_size(pages); |
2af68ef5 | 1259 | pr_debug("mmap size %zuB\n", evlist->mmap_len); |
a8a8f3eb | 1260 | mp.mask = evlist->mmap_len - page_size - 1; |
f8a95309 | 1261 | |
718c602d AH |
1262 | auxtrace_mmap_params__init(&mp.auxtrace_mp, evlist->mmap_len, |
1263 | auxtrace_pages, auxtrace_overwrite); | |
1264 | ||
e5cadb93 | 1265 | evlist__for_each_entry(evlist, evsel) { |
f8a95309 | 1266 | if ((evsel->attr.read_format & PERF_FORMAT_ID) && |
a91e5431 | 1267 | evsel->sample_id == NULL && |
a14bb7a6 | 1268 | perf_evsel__alloc_id(evsel, cpu_map__nr(cpus), threads->nr) < 0) |
f8a95309 | 1269 | return -ENOMEM; |
f8a95309 ACM |
1270 | } |
1271 | ||
ec1e7e43 | 1272 | if (cpu_map__empty(cpus)) |
a8a8f3eb | 1273 | return perf_evlist__mmap_per_thread(evlist, &mp); |
f8a95309 | 1274 | |
a8a8f3eb | 1275 | return perf_evlist__mmap_per_cpu(evlist, &mp); |
f8a95309 | 1276 | } |
7e2ed097 | 1277 | |
718c602d AH |
1278 | int perf_evlist__mmap(struct perf_evlist *evlist, unsigned int pages, |
1279 | bool overwrite) | |
1280 | { | |
1281 | return perf_evlist__mmap_ex(evlist, pages, overwrite, 0, false); | |
1282 | } | |
1283 | ||
602ad878 | 1284 | int perf_evlist__create_maps(struct perf_evlist *evlist, struct target *target) |
7e2ed097 | 1285 | { |
74bfd2b2 AH |
1286 | struct cpu_map *cpus; |
1287 | struct thread_map *threads; | |
7e2ed097 | 1288 | |
74bfd2b2 | 1289 | threads = thread_map__new_str(target->pid, target->tid, target->uid); |
7e2ed097 | 1290 | |
74bfd2b2 | 1291 | if (!threads) |
7e2ed097 ACM |
1292 | return -1; |
1293 | ||
9c105fbc | 1294 | if (target__uses_dummy_map(target)) |
74bfd2b2 | 1295 | cpus = cpu_map__dummy_new(); |
879d77d0 | 1296 | else |
74bfd2b2 | 1297 | cpus = cpu_map__new(target->cpu_list); |
7e2ed097 | 1298 | |
74bfd2b2 | 1299 | if (!cpus) |
7e2ed097 ACM |
1300 | goto out_delete_threads; |
1301 | ||
ec9a77a7 AH |
1302 | evlist->has_user_cpus = !!target->cpu_list; |
1303 | ||
74bfd2b2 | 1304 | perf_evlist__set_maps(evlist, cpus, threads); |
d5bc056e AH |
1305 | |
1306 | return 0; | |
7e2ed097 ACM |
1307 | |
1308 | out_delete_threads: | |
74bfd2b2 | 1309 | thread_map__put(threads); |
7e2ed097 ACM |
1310 | return -1; |
1311 | } | |
1312 | ||
d5bc056e AH |
1313 | void perf_evlist__set_maps(struct perf_evlist *evlist, struct cpu_map *cpus, |
1314 | struct thread_map *threads) | |
3de5cfb0 | 1315 | { |
934e0f20 AH |
1316 | /* |
1317 | * Allow for the possibility that one or another of the maps isn't being | |
1318 | * changed i.e. don't put it. Note we are assuming the maps that are | |
1319 | * being applied are brand new and evlist is taking ownership of the | |
1320 | * original reference count of 1. If that is not the case it is up to | |
1321 | * the caller to increase the reference count. | |
1322 | */ | |
1323 | if (cpus != evlist->cpus) { | |
3de5cfb0 | 1324 | cpu_map__put(evlist->cpus); |
a55e5663 | 1325 | evlist->cpus = cpu_map__get(cpus); |
934e0f20 | 1326 | } |
3de5cfb0 | 1327 | |
934e0f20 | 1328 | if (threads != evlist->threads) { |
3de5cfb0 | 1329 | thread_map__put(evlist->threads); |
a55e5663 | 1330 | evlist->threads = thread_map__get(threads); |
934e0f20 | 1331 | } |
3de5cfb0 | 1332 | |
ec9a77a7 | 1333 | perf_evlist__propagate_maps(evlist); |
3de5cfb0 JO |
1334 | } |
1335 | ||
22c8a376 ACM |
1336 | void __perf_evlist__set_sample_bit(struct perf_evlist *evlist, |
1337 | enum perf_event_sample_format bit) | |
1338 | { | |
1339 | struct perf_evsel *evsel; | |
1340 | ||
e5cadb93 | 1341 | evlist__for_each_entry(evlist, evsel) |
22c8a376 ACM |
1342 | __perf_evsel__set_sample_bit(evsel, bit); |
1343 | } | |
1344 | ||
1345 | void __perf_evlist__reset_sample_bit(struct perf_evlist *evlist, | |
1346 | enum perf_event_sample_format bit) | |
1347 | { | |
1348 | struct perf_evsel *evsel; | |
1349 | ||
e5cadb93 | 1350 | evlist__for_each_entry(evlist, evsel) |
22c8a376 ACM |
1351 | __perf_evsel__reset_sample_bit(evsel, bit); |
1352 | } | |
1353 | ||
23d4aad4 | 1354 | int perf_evlist__apply_filters(struct perf_evlist *evlist, struct perf_evsel **err_evsel) |
0a102479 | 1355 | { |
0a102479 | 1356 | struct perf_evsel *evsel; |
745cefc5 ACM |
1357 | int err = 0; |
1358 | const int ncpus = cpu_map__nr(evlist->cpus), | |
b3a319d5 | 1359 | nthreads = thread_map__nr(evlist->threads); |
0a102479 | 1360 | |
e5cadb93 | 1361 | evlist__for_each_entry(evlist, evsel) { |
745cefc5 | 1362 | if (evsel->filter == NULL) |
0a102479 | 1363 | continue; |
745cefc5 | 1364 | |
d988d5ee KL |
1365 | /* |
1366 | * filters only work for tracepoint event, which doesn't have cpu limit. | |
1367 | * So evlist and evsel should always be same. | |
1368 | */ | |
f47805a2 | 1369 | err = perf_evsel__apply_filter(evsel, ncpus, nthreads, evsel->filter); |
23d4aad4 ACM |
1370 | if (err) { |
1371 | *err_evsel = evsel; | |
745cefc5 | 1372 | break; |
23d4aad4 | 1373 | } |
0a102479 FW |
1374 | } |
1375 | ||
745cefc5 ACM |
1376 | return err; |
1377 | } | |
1378 | ||
1379 | int perf_evlist__set_filter(struct perf_evlist *evlist, const char *filter) | |
1380 | { | |
1381 | struct perf_evsel *evsel; | |
1382 | int err = 0; | |
745cefc5 | 1383 | |
e5cadb93 | 1384 | evlist__for_each_entry(evlist, evsel) { |
fdf14720 WN |
1385 | if (evsel->attr.type != PERF_TYPE_TRACEPOINT) |
1386 | continue; | |
1387 | ||
94ad89bc | 1388 | err = perf_evsel__set_filter(evsel, filter); |
745cefc5 ACM |
1389 | if (err) |
1390 | break; | |
1391 | } | |
1392 | ||
1393 | return err; | |
0a102479 | 1394 | } |
74429964 | 1395 | |
be199ada | 1396 | int perf_evlist__set_filter_pids(struct perf_evlist *evlist, size_t npids, pid_t *pids) |
cfd70a26 ACM |
1397 | { |
1398 | char *filter; | |
be199ada ACM |
1399 | int ret = -1; |
1400 | size_t i; | |
cfd70a26 | 1401 | |
be199ada ACM |
1402 | for (i = 0; i < npids; ++i) { |
1403 | if (i == 0) { | |
1404 | if (asprintf(&filter, "common_pid != %d", pids[i]) < 0) | |
1405 | return -1; | |
1406 | } else { | |
1407 | char *tmp; | |
1408 | ||
1409 | if (asprintf(&tmp, "%s && common_pid != %d", filter, pids[i]) < 0) | |
1410 | goto out_free; | |
1411 | ||
1412 | free(filter); | |
1413 | filter = tmp; | |
1414 | } | |
1415 | } | |
cfd70a26 ACM |
1416 | |
1417 | ret = perf_evlist__set_filter(evlist, filter); | |
be199ada | 1418 | out_free: |
cfd70a26 ACM |
1419 | free(filter); |
1420 | return ret; | |
1421 | } | |
1422 | ||
be199ada ACM |
1423 | int perf_evlist__set_filter_pid(struct perf_evlist *evlist, pid_t pid) |
1424 | { | |
1425 | return perf_evlist__set_filter_pids(evlist, 1, &pid); | |
1426 | } | |
1427 | ||
0c21f736 | 1428 | bool perf_evlist__valid_sample_type(struct perf_evlist *evlist) |
74429964 | 1429 | { |
75562573 | 1430 | struct perf_evsel *pos; |
c2a70653 | 1431 | |
75562573 AH |
1432 | if (evlist->nr_entries == 1) |
1433 | return true; | |
1434 | ||
1435 | if (evlist->id_pos < 0 || evlist->is_pos < 0) | |
1436 | return false; | |
1437 | ||
e5cadb93 | 1438 | evlist__for_each_entry(evlist, pos) { |
75562573 AH |
1439 | if (pos->id_pos != evlist->id_pos || |
1440 | pos->is_pos != evlist->is_pos) | |
c2a70653 | 1441 | return false; |
74429964 FW |
1442 | } |
1443 | ||
c2a70653 | 1444 | return true; |
74429964 FW |
1445 | } |
1446 | ||
75562573 | 1447 | u64 __perf_evlist__combined_sample_type(struct perf_evlist *evlist) |
c2a70653 | 1448 | { |
75562573 AH |
1449 | struct perf_evsel *evsel; |
1450 | ||
1451 | if (evlist->combined_sample_type) | |
1452 | return evlist->combined_sample_type; | |
1453 | ||
e5cadb93 | 1454 | evlist__for_each_entry(evlist, evsel) |
75562573 AH |
1455 | evlist->combined_sample_type |= evsel->attr.sample_type; |
1456 | ||
1457 | return evlist->combined_sample_type; | |
1458 | } | |
1459 | ||
1460 | u64 perf_evlist__combined_sample_type(struct perf_evlist *evlist) | |
1461 | { | |
1462 | evlist->combined_sample_type = 0; | |
1463 | return __perf_evlist__combined_sample_type(evlist); | |
c2a70653 ACM |
1464 | } |
1465 | ||
98df858e AK |
1466 | u64 perf_evlist__combined_branch_type(struct perf_evlist *evlist) |
1467 | { | |
1468 | struct perf_evsel *evsel; | |
1469 | u64 branch_type = 0; | |
1470 | ||
e5cadb93 | 1471 | evlist__for_each_entry(evlist, evsel) |
98df858e AK |
1472 | branch_type |= evsel->attr.branch_sample_type; |
1473 | return branch_type; | |
1474 | } | |
1475 | ||
9ede473c JO |
1476 | bool perf_evlist__valid_read_format(struct perf_evlist *evlist) |
1477 | { | |
1478 | struct perf_evsel *first = perf_evlist__first(evlist), *pos = first; | |
1479 | u64 read_format = first->attr.read_format; | |
1480 | u64 sample_type = first->attr.sample_type; | |
1481 | ||
e5cadb93 | 1482 | evlist__for_each_entry(evlist, pos) { |
9ede473c JO |
1483 | if (read_format != pos->attr.read_format) |
1484 | return false; | |
1485 | } | |
1486 | ||
1487 | /* PERF_SAMPLE_READ imples PERF_FORMAT_ID. */ | |
1488 | if ((sample_type & PERF_SAMPLE_READ) && | |
1489 | !(read_format & PERF_FORMAT_ID)) { | |
1490 | return false; | |
1491 | } | |
1492 | ||
1493 | return true; | |
1494 | } | |
1495 | ||
1496 | u64 perf_evlist__read_format(struct perf_evlist *evlist) | |
1497 | { | |
1498 | struct perf_evsel *first = perf_evlist__first(evlist); | |
1499 | return first->attr.read_format; | |
1500 | } | |
1501 | ||
0c21f736 | 1502 | u16 perf_evlist__id_hdr_size(struct perf_evlist *evlist) |
81e36bff | 1503 | { |
0c21f736 | 1504 | struct perf_evsel *first = perf_evlist__first(evlist); |
81e36bff ACM |
1505 | struct perf_sample *data; |
1506 | u64 sample_type; | |
1507 | u16 size = 0; | |
1508 | ||
81e36bff ACM |
1509 | if (!first->attr.sample_id_all) |
1510 | goto out; | |
1511 | ||
1512 | sample_type = first->attr.sample_type; | |
1513 | ||
1514 | if (sample_type & PERF_SAMPLE_TID) | |
1515 | size += sizeof(data->tid) * 2; | |
1516 | ||
1517 | if (sample_type & PERF_SAMPLE_TIME) | |
1518 | size += sizeof(data->time); | |
1519 | ||
1520 | if (sample_type & PERF_SAMPLE_ID) | |
1521 | size += sizeof(data->id); | |
1522 | ||
1523 | if (sample_type & PERF_SAMPLE_STREAM_ID) | |
1524 | size += sizeof(data->stream_id); | |
1525 | ||
1526 | if (sample_type & PERF_SAMPLE_CPU) | |
1527 | size += sizeof(data->cpu) * 2; | |
75562573 AH |
1528 | |
1529 | if (sample_type & PERF_SAMPLE_IDENTIFIER) | |
1530 | size += sizeof(data->id); | |
81e36bff ACM |
1531 | out: |
1532 | return size; | |
1533 | } | |
1534 | ||
0c21f736 | 1535 | bool perf_evlist__valid_sample_id_all(struct perf_evlist *evlist) |
74429964 | 1536 | { |
0c21f736 | 1537 | struct perf_evsel *first = perf_evlist__first(evlist), *pos = first; |
c2a70653 | 1538 | |
e5cadb93 | 1539 | evlist__for_each_entry_continue(evlist, pos) { |
c2a70653 ACM |
1540 | if (first->attr.sample_id_all != pos->attr.sample_id_all) |
1541 | return false; | |
74429964 FW |
1542 | } |
1543 | ||
c2a70653 ACM |
1544 | return true; |
1545 | } | |
1546 | ||
0c21f736 | 1547 | bool perf_evlist__sample_id_all(struct perf_evlist *evlist) |
c2a70653 | 1548 | { |
0c21f736 | 1549 | struct perf_evsel *first = perf_evlist__first(evlist); |
c2a70653 | 1550 | return first->attr.sample_id_all; |
74429964 | 1551 | } |
81cce8de ACM |
1552 | |
1553 | void perf_evlist__set_selected(struct perf_evlist *evlist, | |
1554 | struct perf_evsel *evsel) | |
1555 | { | |
1556 | evlist->selected = evsel; | |
1557 | } | |
727ab04e | 1558 | |
a74b4b66 NK |
1559 | void perf_evlist__close(struct perf_evlist *evlist) |
1560 | { | |
1561 | struct perf_evsel *evsel; | |
1562 | int ncpus = cpu_map__nr(evlist->cpus); | |
1563 | int nthreads = thread_map__nr(evlist->threads); | |
8ad9219e | 1564 | int n; |
a74b4b66 | 1565 | |
e5cadb93 | 1566 | evlist__for_each_entry_reverse(evlist, evsel) { |
8ad9219e SE |
1567 | n = evsel->cpus ? evsel->cpus->nr : ncpus; |
1568 | perf_evsel__close(evsel, n, nthreads); | |
1569 | } | |
a74b4b66 NK |
1570 | } |
1571 | ||
4112eb18 ACM |
1572 | static int perf_evlist__create_syswide_maps(struct perf_evlist *evlist) |
1573 | { | |
8c0498b6 AH |
1574 | struct cpu_map *cpus; |
1575 | struct thread_map *threads; | |
4112eb18 ACM |
1576 | int err = -ENOMEM; |
1577 | ||
1578 | /* | |
1579 | * Try reading /sys/devices/system/cpu/online to get | |
1580 | * an all cpus map. | |
1581 | * | |
1582 | * FIXME: -ENOMEM is the best we can do here, the cpu_map | |
1583 | * code needs an overhaul to properly forward the | |
1584 | * error, and we may not want to do that fallback to a | |
1585 | * default cpu identity map :-\ | |
1586 | */ | |
8c0498b6 AH |
1587 | cpus = cpu_map__new(NULL); |
1588 | if (!cpus) | |
4112eb18 ACM |
1589 | goto out; |
1590 | ||
8c0498b6 AH |
1591 | threads = thread_map__new_dummy(); |
1592 | if (!threads) | |
1593 | goto out_put; | |
4112eb18 | 1594 | |
8c0498b6 | 1595 | perf_evlist__set_maps(evlist, cpus, threads); |
4112eb18 ACM |
1596 | out: |
1597 | return err; | |
8c0498b6 AH |
1598 | out_put: |
1599 | cpu_map__put(cpus); | |
4112eb18 ACM |
1600 | goto out; |
1601 | } | |
1602 | ||
6a4bb04c | 1603 | int perf_evlist__open(struct perf_evlist *evlist) |
727ab04e | 1604 | { |
6a4bb04c | 1605 | struct perf_evsel *evsel; |
a74b4b66 | 1606 | int err; |
727ab04e | 1607 | |
4112eb18 ACM |
1608 | /* |
1609 | * Default: one fd per CPU, all threads, aka systemwide | |
1610 | * as sys_perf_event_open(cpu = -1, thread = -1) is EINVAL | |
1611 | */ | |
1612 | if (evlist->threads == NULL && evlist->cpus == NULL) { | |
1613 | err = perf_evlist__create_syswide_maps(evlist); | |
1614 | if (err < 0) | |
1615 | goto out_err; | |
1616 | } | |
1617 | ||
733cd2fe AH |
1618 | perf_evlist__update_id_pos(evlist); |
1619 | ||
e5cadb93 | 1620 | evlist__for_each_entry(evlist, evsel) { |
23df7f79 | 1621 | err = perf_evsel__open(evsel, evsel->cpus, evsel->threads); |
727ab04e ACM |
1622 | if (err < 0) |
1623 | goto out_err; | |
1624 | } | |
1625 | ||
1626 | return 0; | |
1627 | out_err: | |
a74b4b66 | 1628 | perf_evlist__close(evlist); |
41c21a68 | 1629 | errno = -err; |
727ab04e ACM |
1630 | return err; |
1631 | } | |
35b9d88e | 1632 | |
602ad878 | 1633 | int perf_evlist__prepare_workload(struct perf_evlist *evlist, struct target *target, |
55e162ea | 1634 | const char *argv[], bool pipe_output, |
735f7e0b | 1635 | void (*exec_error)(int signo, siginfo_t *info, void *ucontext)) |
35b9d88e ACM |
1636 | { |
1637 | int child_ready_pipe[2], go_pipe[2]; | |
1638 | char bf; | |
1639 | ||
1640 | if (pipe(child_ready_pipe) < 0) { | |
1641 | perror("failed to create 'ready' pipe"); | |
1642 | return -1; | |
1643 | } | |
1644 | ||
1645 | if (pipe(go_pipe) < 0) { | |
1646 | perror("failed to create 'go' pipe"); | |
1647 | goto out_close_ready_pipe; | |
1648 | } | |
1649 | ||
1650 | evlist->workload.pid = fork(); | |
1651 | if (evlist->workload.pid < 0) { | |
1652 | perror("failed to fork"); | |
1653 | goto out_close_pipes; | |
1654 | } | |
1655 | ||
1656 | if (!evlist->workload.pid) { | |
5f1c4225 ACM |
1657 | int ret; |
1658 | ||
119fa3c9 | 1659 | if (pipe_output) |
35b9d88e ACM |
1660 | dup2(2, 1); |
1661 | ||
0817df08 DA |
1662 | signal(SIGTERM, SIG_DFL); |
1663 | ||
35b9d88e ACM |
1664 | close(child_ready_pipe[0]); |
1665 | close(go_pipe[1]); | |
1666 | fcntl(go_pipe[0], F_SETFD, FD_CLOEXEC); | |
1667 | ||
35b9d88e ACM |
1668 | /* |
1669 | * Tell the parent we're ready to go | |
1670 | */ | |
1671 | close(child_ready_pipe[1]); | |
1672 | ||
1673 | /* | |
1674 | * Wait until the parent tells us to go. | |
1675 | */ | |
5f1c4225 ACM |
1676 | ret = read(go_pipe[0], &bf, 1); |
1677 | /* | |
1678 | * The parent will ask for the execvp() to be performed by | |
1679 | * writing exactly one byte, in workload.cork_fd, usually via | |
1680 | * perf_evlist__start_workload(). | |
1681 | * | |
20f86fc1 | 1682 | * For cancelling the workload without actually running it, |
5f1c4225 ACM |
1683 | * the parent will just close workload.cork_fd, without writing |
1684 | * anything, i.e. read will return zero and we just exit() | |
1685 | * here. | |
1686 | */ | |
1687 | if (ret != 1) { | |
1688 | if (ret == -1) | |
1689 | perror("unable to read pipe"); | |
1690 | exit(ret); | |
1691 | } | |
35b9d88e ACM |
1692 | |
1693 | execvp(argv[0], (char **)argv); | |
1694 | ||
735f7e0b | 1695 | if (exec_error) { |
f33cbe72 ACM |
1696 | union sigval val; |
1697 | ||
1698 | val.sival_int = errno; | |
1699 | if (sigqueue(getppid(), SIGUSR1, val)) | |
1700 | perror(argv[0]); | |
1701 | } else | |
1702 | perror(argv[0]); | |
35b9d88e ACM |
1703 | exit(-1); |
1704 | } | |
1705 | ||
735f7e0b ACM |
1706 | if (exec_error) { |
1707 | struct sigaction act = { | |
1708 | .sa_flags = SA_SIGINFO, | |
1709 | .sa_sigaction = exec_error, | |
1710 | }; | |
1711 | sigaction(SIGUSR1, &act, NULL); | |
1712 | } | |
1713 | ||
1aaf63b1 ACM |
1714 | if (target__none(target)) { |
1715 | if (evlist->threads == NULL) { | |
1716 | fprintf(stderr, "FATAL: evlist->threads need to be set at this point (%s:%d).\n", | |
1717 | __func__, __LINE__); | |
1718 | goto out_close_pipes; | |
1719 | } | |
e13798c7 | 1720 | thread_map__set_pid(evlist->threads, 0, evlist->workload.pid); |
1aaf63b1 | 1721 | } |
35b9d88e ACM |
1722 | |
1723 | close(child_ready_pipe[1]); | |
1724 | close(go_pipe[0]); | |
1725 | /* | |
1726 | * wait for child to settle | |
1727 | */ | |
1728 | if (read(child_ready_pipe[0], &bf, 1) == -1) { | |
1729 | perror("unable to read pipe"); | |
1730 | goto out_close_pipes; | |
1731 | } | |
1732 | ||
bcf3145f | 1733 | fcntl(go_pipe[1], F_SETFD, FD_CLOEXEC); |
35b9d88e ACM |
1734 | evlist->workload.cork_fd = go_pipe[1]; |
1735 | close(child_ready_pipe[0]); | |
1736 | return 0; | |
1737 | ||
1738 | out_close_pipes: | |
1739 | close(go_pipe[0]); | |
1740 | close(go_pipe[1]); | |
1741 | out_close_ready_pipe: | |
1742 | close(child_ready_pipe[0]); | |
1743 | close(child_ready_pipe[1]); | |
1744 | return -1; | |
1745 | } | |
1746 | ||
1747 | int perf_evlist__start_workload(struct perf_evlist *evlist) | |
1748 | { | |
1749 | if (evlist->workload.cork_fd > 0) { | |
b3824404 | 1750 | char bf = 0; |
bcf3145f | 1751 | int ret; |
35b9d88e ACM |
1752 | /* |
1753 | * Remove the cork, let it rip! | |
1754 | */ | |
bcf3145f NK |
1755 | ret = write(evlist->workload.cork_fd, &bf, 1); |
1756 | if (ret < 0) | |
1757 | perror("enable to write to pipe"); | |
1758 | ||
1759 | close(evlist->workload.cork_fd); | |
1760 | return ret; | |
35b9d88e ACM |
1761 | } |
1762 | ||
1763 | return 0; | |
1764 | } | |
cb0b29e0 | 1765 | |
a3f698fe | 1766 | int perf_evlist__parse_sample(struct perf_evlist *evlist, union perf_event *event, |
0807d2d8 | 1767 | struct perf_sample *sample) |
cb0b29e0 | 1768 | { |
75562573 AH |
1769 | struct perf_evsel *evsel = perf_evlist__event2evsel(evlist, event); |
1770 | ||
1771 | if (!evsel) | |
1772 | return -EFAULT; | |
0807d2d8 | 1773 | return perf_evsel__parse_sample(evsel, event, sample); |
cb0b29e0 | 1774 | } |
78f067b3 ACM |
1775 | |
1776 | size_t perf_evlist__fprintf(struct perf_evlist *evlist, FILE *fp) | |
1777 | { | |
1778 | struct perf_evsel *evsel; | |
1779 | size_t printed = 0; | |
1780 | ||
e5cadb93 | 1781 | evlist__for_each_entry(evlist, evsel) { |
78f067b3 ACM |
1782 | printed += fprintf(fp, "%s%s", evsel->idx ? ", " : "", |
1783 | perf_evsel__name(evsel)); | |
1784 | } | |
1785 | ||
b2222139 | 1786 | return printed + fprintf(fp, "\n"); |
78f067b3 | 1787 | } |
6ef068cb | 1788 | |
d9aade7f | 1789 | int perf_evlist__strerror_open(struct perf_evlist *evlist, |
a8f23d8f ACM |
1790 | int err, char *buf, size_t size) |
1791 | { | |
1792 | int printed, value; | |
c8b5f2c9 | 1793 | char sbuf[STRERR_BUFSIZE], *emsg = str_error_r(err, sbuf, sizeof(sbuf)); |
a8f23d8f ACM |
1794 | |
1795 | switch (err) { | |
1796 | case EACCES: | |
1797 | case EPERM: | |
1798 | printed = scnprintf(buf, size, | |
1799 | "Error:\t%s.\n" | |
1800 | "Hint:\tCheck /proc/sys/kernel/perf_event_paranoid setting.", emsg); | |
1801 | ||
1a47245d | 1802 | value = perf_event_paranoid(); |
a8f23d8f ACM |
1803 | |
1804 | printed += scnprintf(buf + printed, size - printed, "\nHint:\t"); | |
1805 | ||
1806 | if (value >= 2) { | |
1807 | printed += scnprintf(buf + printed, size - printed, | |
1808 | "For your workloads it needs to be <= 1\nHint:\t"); | |
1809 | } | |
1810 | printed += scnprintf(buf + printed, size - printed, | |
5229e366 | 1811 | "For system wide tracing it needs to be set to -1.\n"); |
a8f23d8f ACM |
1812 | |
1813 | printed += scnprintf(buf + printed, size - printed, | |
5229e366 ACM |
1814 | "Hint:\tTry: 'sudo sh -c \"echo -1 > /proc/sys/kernel/perf_event_paranoid\"'\n" |
1815 | "Hint:\tThe current value is %d.", value); | |
a8f23d8f | 1816 | break; |
d9aade7f ACM |
1817 | case EINVAL: { |
1818 | struct perf_evsel *first = perf_evlist__first(evlist); | |
1819 | int max_freq; | |
1820 | ||
1821 | if (sysctl__read_int("kernel/perf_event_max_sample_rate", &max_freq) < 0) | |
1822 | goto out_default; | |
1823 | ||
1824 | if (first->attr.sample_freq < (u64)max_freq) | |
1825 | goto out_default; | |
1826 | ||
1827 | printed = scnprintf(buf, size, | |
1828 | "Error:\t%s.\n" | |
1829 | "Hint:\tCheck /proc/sys/kernel/perf_event_max_sample_rate.\n" | |
1830 | "Hint:\tThe current value is %d and %" PRIu64 " is being requested.", | |
1831 | emsg, max_freq, first->attr.sample_freq); | |
1832 | break; | |
1833 | } | |
a8f23d8f | 1834 | default: |
d9aade7f | 1835 | out_default: |
a8f23d8f ACM |
1836 | scnprintf(buf, size, "%s", emsg); |
1837 | break; | |
1838 | } | |
1839 | ||
1840 | return 0; | |
1841 | } | |
a025e4f0 | 1842 | |
956fa571 ACM |
1843 | int perf_evlist__strerror_mmap(struct perf_evlist *evlist, int err, char *buf, size_t size) |
1844 | { | |
c8b5f2c9 | 1845 | char sbuf[STRERR_BUFSIZE], *emsg = str_error_r(err, sbuf, sizeof(sbuf)); |
e965bea1 | 1846 | int pages_attempted = evlist->mmap_len / 1024, pages_max_per_user, printed = 0; |
956fa571 ACM |
1847 | |
1848 | switch (err) { | |
1849 | case EPERM: | |
e5d4a290 | 1850 | sysctl__read_int("kernel/perf_event_mlock_kb", &pages_max_per_user); |
e965bea1 ACM |
1851 | printed += scnprintf(buf + printed, size - printed, |
1852 | "Error:\t%s.\n" | |
956fa571 | 1853 | "Hint:\tCheck /proc/sys/kernel/perf_event_mlock_kb (%d kB) setting.\n" |
e965bea1 | 1854 | "Hint:\tTried using %zd kB.\n", |
e5d4a290 | 1855 | emsg, pages_max_per_user, pages_attempted); |
e965bea1 ACM |
1856 | |
1857 | if (pages_attempted >= pages_max_per_user) { | |
1858 | printed += scnprintf(buf + printed, size - printed, | |
1859 | "Hint:\tTry 'sudo sh -c \"echo %d > /proc/sys/kernel/perf_event_mlock_kb\"', or\n", | |
1860 | pages_max_per_user + pages_attempted); | |
1861 | } | |
1862 | ||
1863 | printed += scnprintf(buf + printed, size - printed, | |
1864 | "Hint:\tTry using a smaller -m/--mmap-pages value."); | |
956fa571 ACM |
1865 | break; |
1866 | default: | |
1867 | scnprintf(buf, size, "%s", emsg); | |
1868 | break; | |
1869 | } | |
1870 | ||
1871 | return 0; | |
1872 | } | |
1873 | ||
a025e4f0 AH |
1874 | void perf_evlist__to_front(struct perf_evlist *evlist, |
1875 | struct perf_evsel *move_evsel) | |
1876 | { | |
1877 | struct perf_evsel *evsel, *n; | |
1878 | LIST_HEAD(move); | |
1879 | ||
1880 | if (move_evsel == perf_evlist__first(evlist)) | |
1881 | return; | |
1882 | ||
e5cadb93 | 1883 | evlist__for_each_entry_safe(evlist, n, evsel) { |
a025e4f0 AH |
1884 | if (evsel->leader == move_evsel->leader) |
1885 | list_move_tail(&evsel->node, &move); | |
1886 | } | |
1887 | ||
1888 | list_splice(&move, &evlist->entries); | |
1889 | } | |
60b0896c AH |
1890 | |
1891 | void perf_evlist__set_tracking_event(struct perf_evlist *evlist, | |
1892 | struct perf_evsel *tracking_evsel) | |
1893 | { | |
1894 | struct perf_evsel *evsel; | |
1895 | ||
1896 | if (tracking_evsel->tracking) | |
1897 | return; | |
1898 | ||
e5cadb93 | 1899 | evlist__for_each_entry(evlist, evsel) { |
60b0896c AH |
1900 | if (evsel != tracking_evsel) |
1901 | evsel->tracking = false; | |
1902 | } | |
1903 | ||
1904 | tracking_evsel->tracking = true; | |
1905 | } | |
7630b3e2 WN |
1906 | |
1907 | struct perf_evsel * | |
1908 | perf_evlist__find_evsel_by_str(struct perf_evlist *evlist, | |
1909 | const char *str) | |
1910 | { | |
1911 | struct perf_evsel *evsel; | |
1912 | ||
e5cadb93 | 1913 | evlist__for_each_entry(evlist, evsel) { |
7630b3e2 WN |
1914 | if (!evsel->name) |
1915 | continue; | |
1916 | if (strcmp(str, evsel->name) == 0) | |
1917 | return evsel; | |
1918 | } | |
1919 | ||
1920 | return NULL; | |
1921 | } |