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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 | ||
0050f7aa | 103 | evlist__for_each(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 | ||
0050f7aa | 113 | evlist__for_each_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 | { | |
983874d1 | 130 | perf_evlist__munmap(evlist); |
f26e1c7c | 131 | perf_evlist__close(evlist); |
f30a79b0 | 132 | cpu_map__put(evlist->cpus); |
186fbb74 | 133 | thread_map__put(evlist->threads); |
03ad9747 ACM |
134 | evlist->cpus = NULL; |
135 | evlist->threads = NULL; | |
ef1d1af2 ACM |
136 | perf_evlist__purge(evlist); |
137 | perf_evlist__exit(evlist); | |
361c99a6 ACM |
138 | free(evlist); |
139 | } | |
140 | ||
adc0c3e8 AH |
141 | static void __perf_evlist__propagate_maps(struct perf_evlist *evlist, |
142 | struct perf_evsel *evsel) | |
143 | { | |
144 | /* | |
145 | * We already have cpus for evsel (via PMU sysfs) so | |
146 | * keep it, if there's no target cpu list defined. | |
147 | */ | |
148 | if (!evsel->own_cpus || evlist->has_user_cpus) { | |
149 | cpu_map__put(evsel->cpus); | |
150 | evsel->cpus = cpu_map__get(evlist->cpus); | |
151 | } else if (evsel->cpus != evsel->own_cpus) { | |
152 | cpu_map__put(evsel->cpus); | |
153 | evsel->cpus = cpu_map__get(evsel->own_cpus); | |
154 | } | |
155 | ||
156 | thread_map__put(evsel->threads); | |
157 | evsel->threads = thread_map__get(evlist->threads); | |
158 | } | |
159 | ||
160 | static void perf_evlist__propagate_maps(struct perf_evlist *evlist) | |
161 | { | |
162 | struct perf_evsel *evsel; | |
163 | ||
164 | evlist__for_each(evlist, evsel) | |
165 | __perf_evlist__propagate_maps(evlist, evsel); | |
166 | } | |
167 | ||
361c99a6 ACM |
168 | void perf_evlist__add(struct perf_evlist *evlist, struct perf_evsel *entry) |
169 | { | |
d49e4695 | 170 | entry->evlist = evlist; |
361c99a6 | 171 | list_add_tail(&entry->node, &evlist->entries); |
ef503831 | 172 | entry->idx = evlist->nr_entries; |
60b0896c | 173 | entry->tracking = !entry->idx; |
ef503831 | 174 | |
75562573 AH |
175 | if (!evlist->nr_entries++) |
176 | perf_evlist__set_id_pos(evlist); | |
44c42d71 AH |
177 | |
178 | __perf_evlist__propagate_maps(evlist, entry); | |
361c99a6 ACM |
179 | } |
180 | ||
4768230a AH |
181 | void perf_evlist__remove(struct perf_evlist *evlist, struct perf_evsel *evsel) |
182 | { | |
183 | evsel->evlist = NULL; | |
184 | list_del_init(&evsel->node); | |
185 | evlist->nr_entries -= 1; | |
186 | } | |
187 | ||
0529bc1f | 188 | void perf_evlist__splice_list_tail(struct perf_evlist *evlist, |
f114d6ef | 189 | struct list_head *list) |
50d08e47 | 190 | { |
f114d6ef | 191 | struct perf_evsel *evsel, *temp; |
75562573 | 192 | |
f114d6ef AH |
193 | __evlist__for_each_safe(list, temp, evsel) { |
194 | list_del_init(&evsel->node); | |
195 | perf_evlist__add(evlist, evsel); | |
196 | } | |
50d08e47 ACM |
197 | } |
198 | ||
63dab225 ACM |
199 | void __perf_evlist__set_leader(struct list_head *list) |
200 | { | |
201 | struct perf_evsel *evsel, *leader; | |
202 | ||
203 | leader = list_entry(list->next, struct perf_evsel, node); | |
97f63e4a NK |
204 | evsel = list_entry(list->prev, struct perf_evsel, node); |
205 | ||
206 | leader->nr_members = evsel->idx - leader->idx + 1; | |
63dab225 | 207 | |
0050f7aa | 208 | __evlist__for_each(list, evsel) { |
74b2133d | 209 | evsel->leader = leader; |
63dab225 ACM |
210 | } |
211 | } | |
212 | ||
213 | void perf_evlist__set_leader(struct perf_evlist *evlist) | |
6a4bb04c | 214 | { |
97f63e4a NK |
215 | if (evlist->nr_entries) { |
216 | evlist->nr_groups = evlist->nr_entries > 1 ? 1 : 0; | |
63dab225 | 217 | __perf_evlist__set_leader(&evlist->entries); |
97f63e4a | 218 | } |
6a4bb04c JO |
219 | } |
220 | ||
45cf6c33 | 221 | void perf_event_attr__set_max_precise_ip(struct perf_event_attr *attr) |
7f8d1ade ACM |
222 | { |
223 | attr->precise_ip = 3; | |
224 | ||
225 | while (attr->precise_ip != 0) { | |
226 | int fd = sys_perf_event_open(attr, 0, -1, -1, 0); | |
227 | if (fd != -1) { | |
228 | close(fd); | |
229 | break; | |
230 | } | |
231 | --attr->precise_ip; | |
232 | } | |
233 | } | |
234 | ||
361c99a6 ACM |
235 | int perf_evlist__add_default(struct perf_evlist *evlist) |
236 | { | |
237 | struct perf_event_attr attr = { | |
238 | .type = PERF_TYPE_HARDWARE, | |
239 | .config = PERF_COUNT_HW_CPU_CYCLES, | |
240 | }; | |
1aed2671 JR |
241 | struct perf_evsel *evsel; |
242 | ||
243 | event_attr_init(&attr); | |
361c99a6 | 244 | |
7f8d1ade ACM |
245 | perf_event_attr__set_max_precise_ip(&attr); |
246 | ||
ef503831 | 247 | evsel = perf_evsel__new(&attr); |
361c99a6 | 248 | if (evsel == NULL) |
cc2d86b0 SE |
249 | goto error; |
250 | ||
7f8d1ade ACM |
251 | /* use asprintf() because free(evsel) assumes name is allocated */ |
252 | if (asprintf(&evsel->name, "cycles%.*s", | |
253 | attr.precise_ip ? attr.precise_ip + 1 : 0, ":ppp") < 0) | |
cc2d86b0 | 254 | goto error_free; |
361c99a6 ACM |
255 | |
256 | perf_evlist__add(evlist, evsel); | |
257 | return 0; | |
cc2d86b0 SE |
258 | error_free: |
259 | perf_evsel__delete(evsel); | |
260 | error: | |
261 | return -ENOMEM; | |
361c99a6 | 262 | } |
5c581041 | 263 | |
5bae0250 ACM |
264 | int perf_evlist__add_dummy(struct perf_evlist *evlist) |
265 | { | |
266 | struct perf_event_attr attr = { | |
267 | .type = PERF_TYPE_SOFTWARE, | |
268 | .config = PERF_COUNT_SW_DUMMY, | |
269 | .size = sizeof(attr), /* to capture ABI version */ | |
270 | }; | |
271 | struct perf_evsel *evsel = perf_evsel__new(&attr); | |
272 | ||
273 | if (evsel == NULL) | |
274 | return -ENOMEM; | |
275 | ||
276 | perf_evlist__add(evlist, evsel); | |
277 | return 0; | |
278 | } | |
279 | ||
e60fc847 ACM |
280 | static int perf_evlist__add_attrs(struct perf_evlist *evlist, |
281 | struct perf_event_attr *attrs, size_t nr_attrs) | |
50d08e47 ACM |
282 | { |
283 | struct perf_evsel *evsel, *n; | |
284 | LIST_HEAD(head); | |
285 | size_t i; | |
286 | ||
287 | for (i = 0; i < nr_attrs; i++) { | |
ef503831 | 288 | evsel = perf_evsel__new_idx(attrs + i, evlist->nr_entries + i); |
50d08e47 ACM |
289 | if (evsel == NULL) |
290 | goto out_delete_partial_list; | |
291 | list_add_tail(&evsel->node, &head); | |
292 | } | |
293 | ||
f114d6ef | 294 | perf_evlist__splice_list_tail(evlist, &head); |
50d08e47 ACM |
295 | |
296 | return 0; | |
297 | ||
298 | out_delete_partial_list: | |
0050f7aa | 299 | __evlist__for_each_safe(&head, n, evsel) |
50d08e47 ACM |
300 | perf_evsel__delete(evsel); |
301 | return -1; | |
302 | } | |
303 | ||
79695e1b ACM |
304 | int __perf_evlist__add_default_attrs(struct perf_evlist *evlist, |
305 | struct perf_event_attr *attrs, size_t nr_attrs) | |
306 | { | |
307 | size_t i; | |
308 | ||
309 | for (i = 0; i < nr_attrs; i++) | |
310 | event_attr_init(attrs + i); | |
311 | ||
312 | return perf_evlist__add_attrs(evlist, attrs, nr_attrs); | |
313 | } | |
314 | ||
da378962 ACM |
315 | struct perf_evsel * |
316 | perf_evlist__find_tracepoint_by_id(struct perf_evlist *evlist, int id) | |
ee29be62 ACM |
317 | { |
318 | struct perf_evsel *evsel; | |
319 | ||
0050f7aa | 320 | evlist__for_each(evlist, evsel) { |
ee29be62 ACM |
321 | if (evsel->attr.type == PERF_TYPE_TRACEPOINT && |
322 | (int)evsel->attr.config == id) | |
323 | return evsel; | |
324 | } | |
325 | ||
326 | return NULL; | |
327 | } | |
328 | ||
a2f2804a DA |
329 | struct perf_evsel * |
330 | perf_evlist__find_tracepoint_by_name(struct perf_evlist *evlist, | |
331 | const char *name) | |
332 | { | |
333 | struct perf_evsel *evsel; | |
334 | ||
0050f7aa | 335 | evlist__for_each(evlist, evsel) { |
a2f2804a DA |
336 | if ((evsel->attr.type == PERF_TYPE_TRACEPOINT) && |
337 | (strcmp(evsel->name, name) == 0)) | |
338 | return evsel; | |
339 | } | |
340 | ||
341 | return NULL; | |
342 | } | |
343 | ||
39876e7d ACM |
344 | int perf_evlist__add_newtp(struct perf_evlist *evlist, |
345 | const char *sys, const char *name, void *handler) | |
346 | { | |
ef503831 | 347 | struct perf_evsel *evsel = perf_evsel__newtp(sys, name); |
39876e7d | 348 | |
8dd2a131 | 349 | if (IS_ERR(evsel)) |
39876e7d ACM |
350 | return -1; |
351 | ||
744a9719 | 352 | evsel->handler = handler; |
39876e7d ACM |
353 | perf_evlist__add(evlist, evsel); |
354 | return 0; | |
355 | } | |
356 | ||
bf8e8f4b AH |
357 | static int perf_evlist__nr_threads(struct perf_evlist *evlist, |
358 | struct perf_evsel *evsel) | |
359 | { | |
360 | if (evsel->system_wide) | |
361 | return 1; | |
362 | else | |
363 | return thread_map__nr(evlist->threads); | |
364 | } | |
365 | ||
4152ab37 ACM |
366 | void perf_evlist__disable(struct perf_evlist *evlist) |
367 | { | |
4152ab37 | 368 | struct perf_evsel *pos; |
3e27c920 JO |
369 | |
370 | evlist__for_each(evlist, pos) { | |
371 | if (!perf_evsel__is_group_leader(pos) || !pos->fd) | |
372 | continue; | |
373 | perf_evsel__disable(pos); | |
4152ab37 | 374 | } |
2b56bcfb ACM |
375 | |
376 | evlist->enabled = false; | |
4152ab37 ACM |
377 | } |
378 | ||
764e16a3 DA |
379 | void perf_evlist__enable(struct perf_evlist *evlist) |
380 | { | |
764e16a3 | 381 | struct perf_evsel *pos; |
3e27c920 JO |
382 | |
383 | evlist__for_each(evlist, pos) { | |
384 | if (!perf_evsel__is_group_leader(pos) || !pos->fd) | |
385 | continue; | |
386 | perf_evsel__enable(pos); | |
764e16a3 | 387 | } |
2b56bcfb ACM |
388 | |
389 | evlist->enabled = true; | |
390 | } | |
391 | ||
392 | void perf_evlist__toggle_enable(struct perf_evlist *evlist) | |
393 | { | |
394 | (evlist->enabled ? perf_evlist__disable : perf_evlist__enable)(evlist); | |
764e16a3 DA |
395 | } |
396 | ||
1c65056c AH |
397 | static int perf_evlist__enable_event_cpu(struct perf_evlist *evlist, |
398 | struct perf_evsel *evsel, int cpu) | |
399 | { | |
400 | int thread, err; | |
401 | int nr_threads = perf_evlist__nr_threads(evlist, evsel); | |
402 | ||
403 | if (!evsel->fd) | |
404 | return -EINVAL; | |
405 | ||
406 | for (thread = 0; thread < nr_threads; thread++) { | |
407 | err = ioctl(FD(evsel, cpu, thread), | |
408 | PERF_EVENT_IOC_ENABLE, 0); | |
409 | if (err) | |
410 | return err; | |
411 | } | |
412 | return 0; | |
413 | } | |
414 | ||
415 | static int perf_evlist__enable_event_thread(struct perf_evlist *evlist, | |
416 | struct perf_evsel *evsel, | |
417 | int thread) | |
418 | { | |
419 | int cpu, err; | |
420 | int nr_cpus = cpu_map__nr(evlist->cpus); | |
421 | ||
422 | if (!evsel->fd) | |
423 | return -EINVAL; | |
424 | ||
425 | for (cpu = 0; cpu < nr_cpus; cpu++) { | |
426 | err = ioctl(FD(evsel, cpu, thread), PERF_EVENT_IOC_ENABLE, 0); | |
427 | if (err) | |
428 | return err; | |
429 | } | |
430 | return 0; | |
431 | } | |
432 | ||
433 | int perf_evlist__enable_event_idx(struct perf_evlist *evlist, | |
434 | struct perf_evsel *evsel, int idx) | |
435 | { | |
436 | bool per_cpu_mmaps = !cpu_map__empty(evlist->cpus); | |
437 | ||
438 | if (per_cpu_mmaps) | |
439 | return perf_evlist__enable_event_cpu(evlist, evsel, idx); | |
440 | else | |
441 | return perf_evlist__enable_event_thread(evlist, evsel, idx); | |
442 | } | |
443 | ||
ad6765dd | 444 | int perf_evlist__alloc_pollfd(struct perf_evlist *evlist) |
5c581041 | 445 | { |
b3a319d5 NK |
446 | int nr_cpus = cpu_map__nr(evlist->cpus); |
447 | int nr_threads = thread_map__nr(evlist->threads); | |
bf8e8f4b AH |
448 | int nfds = 0; |
449 | struct perf_evsel *evsel; | |
450 | ||
cba9b847 | 451 | evlist__for_each(evlist, evsel) { |
bf8e8f4b AH |
452 | if (evsel->system_wide) |
453 | nfds += nr_cpus; | |
454 | else | |
455 | nfds += nr_cpus * nr_threads; | |
456 | } | |
457 | ||
1b85337d ACM |
458 | if (fdarray__available_entries(&evlist->pollfd) < nfds && |
459 | fdarray__grow(&evlist->pollfd, nfds) < 0) | |
ad6765dd ACM |
460 | return -ENOMEM; |
461 | ||
462 | return 0; | |
5c581041 | 463 | } |
70082dd9 | 464 | |
f3058a1c | 465 | static int __perf_evlist__add_pollfd(struct perf_evlist *evlist, int fd, int idx, short revent) |
e4b356b5 | 466 | { |
f3058a1c | 467 | int pos = fdarray__add(&evlist->pollfd, fd, revent | POLLERR | POLLHUP); |
e4b356b5 ACM |
468 | /* |
469 | * Save the idx so that when we filter out fds POLLHUP'ed we can | |
470 | * close the associated evlist->mmap[] entry. | |
471 | */ | |
472 | if (pos >= 0) { | |
473 | evlist->pollfd.priv[pos].idx = idx; | |
474 | ||
475 | fcntl(fd, F_SETFL, O_NONBLOCK); | |
476 | } | |
477 | ||
478 | return pos; | |
479 | } | |
480 | ||
ad6765dd | 481 | int perf_evlist__add_pollfd(struct perf_evlist *evlist, int fd) |
70082dd9 | 482 | { |
f3058a1c | 483 | return __perf_evlist__add_pollfd(evlist, fd, -1, POLLIN); |
e4b356b5 ACM |
484 | } |
485 | ||
258e4bfc WN |
486 | static void perf_evlist__munmap_filtered(struct fdarray *fda, int fd, |
487 | void *arg __maybe_unused) | |
e4b356b5 ACM |
488 | { |
489 | struct perf_evlist *evlist = container_of(fda, struct perf_evlist, pollfd); | |
1b85337d | 490 | |
e4b356b5 | 491 | perf_evlist__mmap_put(evlist, fda->priv[fd].idx); |
70082dd9 | 492 | } |
70db7533 | 493 | |
1ddec7f0 ACM |
494 | int perf_evlist__filter_pollfd(struct perf_evlist *evlist, short revents_and_mask) |
495 | { | |
e4b356b5 | 496 | return fdarray__filter(&evlist->pollfd, revents_and_mask, |
258e4bfc | 497 | perf_evlist__munmap_filtered, NULL); |
1ddec7f0 ACM |
498 | } |
499 | ||
f66a889d ACM |
500 | int perf_evlist__poll(struct perf_evlist *evlist, int timeout) |
501 | { | |
1b85337d | 502 | return fdarray__poll(&evlist->pollfd, timeout); |
f66a889d ACM |
503 | } |
504 | ||
a91e5431 ACM |
505 | static void perf_evlist__id_hash(struct perf_evlist *evlist, |
506 | struct perf_evsel *evsel, | |
507 | int cpu, int thread, u64 id) | |
3d3b5e95 ACM |
508 | { |
509 | int hash; | |
510 | struct perf_sample_id *sid = SID(evsel, cpu, thread); | |
511 | ||
512 | sid->id = id; | |
513 | sid->evsel = evsel; | |
514 | hash = hash_64(sid->id, PERF_EVLIST__HLIST_BITS); | |
515 | hlist_add_head(&sid->node, &evlist->heads[hash]); | |
516 | } | |
517 | ||
a91e5431 ACM |
518 | void perf_evlist__id_add(struct perf_evlist *evlist, struct perf_evsel *evsel, |
519 | int cpu, int thread, u64 id) | |
520 | { | |
521 | perf_evlist__id_hash(evlist, evsel, cpu, thread, id); | |
522 | evsel->id[evsel->ids++] = id; | |
523 | } | |
524 | ||
1c59612d JO |
525 | int perf_evlist__id_add_fd(struct perf_evlist *evlist, |
526 | struct perf_evsel *evsel, | |
527 | int cpu, int thread, int fd) | |
f8a95309 | 528 | { |
f8a95309 | 529 | u64 read_data[4] = { 0, }; |
3d3b5e95 | 530 | int id_idx = 1; /* The first entry is the counter value */ |
e2b5abe0 JO |
531 | u64 id; |
532 | int ret; | |
533 | ||
534 | ret = ioctl(fd, PERF_EVENT_IOC_ID, &id); | |
535 | if (!ret) | |
536 | goto add; | |
537 | ||
538 | if (errno != ENOTTY) | |
539 | return -1; | |
540 | ||
541 | /* Legacy way to get event id.. All hail to old kernels! */ | |
f8a95309 | 542 | |
c4861afe JO |
543 | /* |
544 | * This way does not work with group format read, so bail | |
545 | * out in that case. | |
546 | */ | |
547 | if (perf_evlist__read_format(evlist) & PERF_FORMAT_GROUP) | |
548 | return -1; | |
549 | ||
f8a95309 ACM |
550 | if (!(evsel->attr.read_format & PERF_FORMAT_ID) || |
551 | read(fd, &read_data, sizeof(read_data)) == -1) | |
552 | return -1; | |
553 | ||
554 | if (evsel->attr.read_format & PERF_FORMAT_TOTAL_TIME_ENABLED) | |
555 | ++id_idx; | |
556 | if (evsel->attr.read_format & PERF_FORMAT_TOTAL_TIME_RUNNING) | |
557 | ++id_idx; | |
558 | ||
e2b5abe0 JO |
559 | id = read_data[id_idx]; |
560 | ||
561 | add: | |
562 | perf_evlist__id_add(evlist, evsel, cpu, thread, id); | |
f8a95309 ACM |
563 | return 0; |
564 | } | |
565 | ||
3c659eed AH |
566 | static void perf_evlist__set_sid_idx(struct perf_evlist *evlist, |
567 | struct perf_evsel *evsel, int idx, int cpu, | |
568 | int thread) | |
569 | { | |
570 | struct perf_sample_id *sid = SID(evsel, cpu, thread); | |
571 | sid->idx = idx; | |
572 | if (evlist->cpus && cpu >= 0) | |
573 | sid->cpu = evlist->cpus->map[cpu]; | |
574 | else | |
575 | sid->cpu = -1; | |
576 | if (!evsel->system_wide && evlist->threads && thread >= 0) | |
e13798c7 | 577 | sid->tid = thread_map__pid(evlist->threads, thread); |
3c659eed AH |
578 | else |
579 | sid->tid = -1; | |
580 | } | |
581 | ||
932a3594 | 582 | struct perf_sample_id *perf_evlist__id2sid(struct perf_evlist *evlist, u64 id) |
70db7533 ACM |
583 | { |
584 | struct hlist_head *head; | |
70db7533 ACM |
585 | struct perf_sample_id *sid; |
586 | int hash; | |
587 | ||
70db7533 ACM |
588 | hash = hash_64(id, PERF_EVLIST__HLIST_BITS); |
589 | head = &evlist->heads[hash]; | |
590 | ||
b67bfe0d | 591 | hlist_for_each_entry(sid, head, node) |
70db7533 | 592 | if (sid->id == id) |
932a3594 JO |
593 | return sid; |
594 | ||
595 | return NULL; | |
596 | } | |
597 | ||
598 | struct perf_evsel *perf_evlist__id2evsel(struct perf_evlist *evlist, u64 id) | |
599 | { | |
600 | struct perf_sample_id *sid; | |
601 | ||
05169df5 | 602 | if (evlist->nr_entries == 1 || !id) |
932a3594 JO |
603 | return perf_evlist__first(evlist); |
604 | ||
605 | sid = perf_evlist__id2sid(evlist, id); | |
606 | if (sid) | |
607 | return sid->evsel; | |
30e68bcc NK |
608 | |
609 | if (!perf_evlist__sample_id_all(evlist)) | |
0c21f736 | 610 | return perf_evlist__first(evlist); |
30e68bcc | 611 | |
70db7533 ACM |
612 | return NULL; |
613 | } | |
04391deb | 614 | |
dddcf6ab AH |
615 | struct perf_evsel *perf_evlist__id2evsel_strict(struct perf_evlist *evlist, |
616 | u64 id) | |
617 | { | |
618 | struct perf_sample_id *sid; | |
619 | ||
620 | if (!id) | |
621 | return NULL; | |
622 | ||
623 | sid = perf_evlist__id2sid(evlist, id); | |
624 | if (sid) | |
625 | return sid->evsel; | |
626 | ||
627 | return NULL; | |
628 | } | |
629 | ||
75562573 AH |
630 | static int perf_evlist__event2id(struct perf_evlist *evlist, |
631 | union perf_event *event, u64 *id) | |
632 | { | |
633 | const u64 *array = event->sample.array; | |
634 | ssize_t n; | |
635 | ||
636 | n = (event->header.size - sizeof(event->header)) >> 3; | |
637 | ||
638 | if (event->header.type == PERF_RECORD_SAMPLE) { | |
639 | if (evlist->id_pos >= n) | |
640 | return -1; | |
641 | *id = array[evlist->id_pos]; | |
642 | } else { | |
643 | if (evlist->is_pos > n) | |
644 | return -1; | |
645 | n -= evlist->is_pos; | |
646 | *id = array[n]; | |
647 | } | |
648 | return 0; | |
649 | } | |
650 | ||
651 | static struct perf_evsel *perf_evlist__event2evsel(struct perf_evlist *evlist, | |
652 | union perf_event *event) | |
653 | { | |
98be6966 | 654 | struct perf_evsel *first = perf_evlist__first(evlist); |
75562573 AH |
655 | struct hlist_head *head; |
656 | struct perf_sample_id *sid; | |
657 | int hash; | |
658 | u64 id; | |
659 | ||
660 | if (evlist->nr_entries == 1) | |
98be6966 AH |
661 | return first; |
662 | ||
663 | if (!first->attr.sample_id_all && | |
664 | event->header.type != PERF_RECORD_SAMPLE) | |
665 | return first; | |
75562573 AH |
666 | |
667 | if (perf_evlist__event2id(evlist, event, &id)) | |
668 | return NULL; | |
669 | ||
670 | /* Synthesized events have an id of zero */ | |
671 | if (!id) | |
98be6966 | 672 | return first; |
75562573 AH |
673 | |
674 | hash = hash_64(id, PERF_EVLIST__HLIST_BITS); | |
675 | head = &evlist->heads[hash]; | |
676 | ||
677 | hlist_for_each_entry(sid, head, node) { | |
678 | if (sid->id == id) | |
679 | return sid->evsel; | |
680 | } | |
681 | return NULL; | |
682 | } | |
683 | ||
65aea233 WN |
684 | static int perf_evlist__set_paused(struct perf_evlist *evlist, bool value) |
685 | { | |
686 | int i; | |
687 | ||
688 | for (i = 0; i < evlist->nr_mmaps; i++) { | |
689 | int fd = evlist->mmap[i].fd; | |
690 | int err; | |
691 | ||
692 | if (fd < 0) | |
693 | continue; | |
694 | err = ioctl(fd, PERF_EVENT_IOC_PAUSE_OUTPUT, value ? 1 : 0); | |
695 | if (err) | |
696 | return err; | |
697 | } | |
698 | return 0; | |
699 | } | |
700 | ||
701 | int perf_evlist__pause(struct perf_evlist *evlist) | |
702 | { | |
703 | return perf_evlist__set_paused(evlist, true); | |
704 | } | |
705 | ||
706 | int perf_evlist__resume(struct perf_evlist *evlist) | |
707 | { | |
708 | return perf_evlist__set_paused(evlist, false); | |
709 | } | |
710 | ||
b6b85dad | 711 | /* When check_messup is true, 'end' must points to a good entry */ |
0f4ccd11 | 712 | static union perf_event * |
b6b85dad WN |
713 | perf_mmap__read(struct perf_mmap *md, bool check_messup, u64 start, |
714 | u64 end, u64 *prev) | |
04391deb | 715 | { |
04391deb | 716 | unsigned char *data = md->base + page_size; |
8115d60c | 717 | union perf_event *event = NULL; |
b6b85dad | 718 | int diff = end - start; |
04391deb | 719 | |
b6b85dad | 720 | if (check_messup) { |
04391deb | 721 | /* |
7bb41152 ACM |
722 | * If we're further behind than half the buffer, there's a chance |
723 | * the writer will bite our tail and mess up the samples under us. | |
724 | * | |
b6b85dad | 725 | * If we somehow ended up ahead of the 'end', we got messed up. |
7bb41152 | 726 | * |
b6b85dad | 727 | * In either case, truncate and restart at 'end'. |
04391deb | 728 | */ |
7bb41152 ACM |
729 | if (diff > md->mask / 2 || diff < 0) { |
730 | fprintf(stderr, "WARNING: failed to keep up with mmap data.\n"); | |
731 | ||
732 | /* | |
b6b85dad | 733 | * 'end' points to a known good entry, start there. |
7bb41152 | 734 | */ |
b6b85dad | 735 | start = end; |
b04b7023 | 736 | diff = 0; |
7bb41152 | 737 | } |
04391deb ACM |
738 | } |
739 | ||
b04b7023 | 740 | if (diff >= (int)sizeof(event->header)) { |
04391deb ACM |
741 | size_t size; |
742 | ||
b6b85dad | 743 | event = (union perf_event *)&data[start & md->mask]; |
04391deb ACM |
744 | size = event->header.size; |
745 | ||
b04b7023 WN |
746 | if (size < sizeof(event->header) || diff < (int)size) { |
747 | event = NULL; | |
748 | goto broken_event; | |
749 | } | |
750 | ||
04391deb ACM |
751 | /* |
752 | * Event straddles the mmap boundary -- header should always | |
753 | * be inside due to u64 alignment of output. | |
754 | */ | |
b6b85dad WN |
755 | if ((start & md->mask) + size != ((start + size) & md->mask)) { |
756 | unsigned int offset = start; | |
04391deb | 757 | unsigned int len = min(sizeof(*event), size), cpy; |
a65cb4b9 | 758 | void *dst = md->event_copy; |
04391deb ACM |
759 | |
760 | do { | |
761 | cpy = min(md->mask + 1 - (offset & md->mask), len); | |
762 | memcpy(dst, &data[offset & md->mask], cpy); | |
763 | offset += cpy; | |
764 | dst += cpy; | |
765 | len -= cpy; | |
766 | } while (len); | |
767 | ||
a65cb4b9 | 768 | event = (union perf_event *) md->event_copy; |
04391deb ACM |
769 | } |
770 | ||
b6b85dad | 771 | start += size; |
04391deb ACM |
772 | } |
773 | ||
b04b7023 | 774 | broken_event: |
0f4ccd11 | 775 | if (prev) |
b6b85dad | 776 | *prev = start; |
7bb41152 | 777 | |
04391deb ACM |
778 | return event; |
779 | } | |
f8a95309 | 780 | |
5a5ddeb6 | 781 | union perf_event *perf_evlist__mmap_read_forward(struct perf_evlist *evlist, int idx) |
0f4ccd11 WN |
782 | { |
783 | struct perf_mmap *md = &evlist->mmap[idx]; | |
784 | u64 head; | |
785 | u64 old = md->prev; | |
786 | ||
787 | /* | |
788 | * Check if event was unmapped due to a POLLHUP/POLLERR. | |
789 | */ | |
790 | if (!atomic_read(&md->refcnt)) | |
791 | return NULL; | |
792 | ||
793 | head = perf_mmap__read_head(md); | |
794 | ||
b6b85dad | 795 | return perf_mmap__read(md, evlist->overwrite, old, head, &md->prev); |
0f4ccd11 WN |
796 | } |
797 | ||
e24c7520 WN |
798 | union perf_event * |
799 | perf_evlist__mmap_read_backward(struct perf_evlist *evlist, int idx) | |
800 | { | |
801 | struct perf_mmap *md = &evlist->mmap[idx]; | |
802 | u64 head, end; | |
803 | u64 start = md->prev; | |
804 | ||
805 | /* | |
806 | * Check if event was unmapped due to a POLLHUP/POLLERR. | |
807 | */ | |
808 | if (!atomic_read(&md->refcnt)) | |
809 | return NULL; | |
810 | ||
811 | head = perf_mmap__read_head(md); | |
812 | if (!head) | |
813 | return NULL; | |
814 | ||
815 | /* | |
816 | * 'head' pointer starts from 0. Kernel minus sizeof(record) form | |
817 | * it each time when kernel writes to it, so in fact 'head' is | |
818 | * negative. 'end' pointer is made manually by adding the size of | |
819 | * the ring buffer to 'head' pointer, means the validate data can | |
820 | * read is the whole ring buffer. If 'end' is positive, the ring | |
821 | * buffer has not fully filled, so we must adjust 'end' to 0. | |
822 | * | |
823 | * However, since both 'head' and 'end' is unsigned, we can't | |
824 | * simply compare 'end' against 0. Here we compare '-head' and | |
825 | * the size of the ring buffer, where -head is the number of bytes | |
826 | * kernel write to the ring buffer. | |
827 | */ | |
828 | if (-head < (u64)(md->mask + 1)) | |
829 | end = 0; | |
830 | else | |
831 | end = head + md->mask + 1; | |
832 | ||
833 | return perf_mmap__read(md, false, start, end, &md->prev); | |
834 | } | |
835 | ||
5a5ddeb6 WN |
836 | union perf_event *perf_evlist__mmap_read(struct perf_evlist *evlist, int idx) |
837 | { | |
838 | if (!evlist->backward) | |
839 | return perf_evlist__mmap_read_forward(evlist, idx); | |
840 | return perf_evlist__mmap_read_backward(evlist, idx); | |
841 | } | |
842 | ||
e24c7520 WN |
843 | void perf_evlist__mmap_read_catchup(struct perf_evlist *evlist, int idx) |
844 | { | |
845 | struct perf_mmap *md = &evlist->mmap[idx]; | |
846 | u64 head; | |
847 | ||
848 | if (!atomic_read(&md->refcnt)) | |
849 | return; | |
850 | ||
851 | head = perf_mmap__read_head(md); | |
852 | md->prev = head; | |
853 | } | |
854 | ||
82396986 ACM |
855 | static bool perf_mmap__empty(struct perf_mmap *md) |
856 | { | |
b72e74d1 | 857 | return perf_mmap__read_head(md) == md->prev && !md->auxtrace_mmap.base; |
82396986 ACM |
858 | } |
859 | ||
860 | static void perf_evlist__mmap_get(struct perf_evlist *evlist, int idx) | |
861 | { | |
7143849a | 862 | atomic_inc(&evlist->mmap[idx].refcnt); |
82396986 ACM |
863 | } |
864 | ||
865 | static void perf_evlist__mmap_put(struct perf_evlist *evlist, int idx) | |
866 | { | |
e10e4ef6 WN |
867 | struct perf_mmap *md = &evlist->mmap[idx]; |
868 | ||
869 | BUG_ON(md->base && atomic_read(&md->refcnt) == 0); | |
82396986 | 870 | |
e10e4ef6 | 871 | if (atomic_dec_and_test(&md->refcnt)) |
82396986 ACM |
872 | __perf_evlist__munmap(evlist, idx); |
873 | } | |
874 | ||
8e50d384 ZZ |
875 | void perf_evlist__mmap_consume(struct perf_evlist *evlist, int idx) |
876 | { | |
82396986 ACM |
877 | struct perf_mmap *md = &evlist->mmap[idx]; |
878 | ||
8e50d384 | 879 | if (!evlist->overwrite) { |
7b8283b5 | 880 | u64 old = md->prev; |
8e50d384 ZZ |
881 | |
882 | perf_mmap__write_tail(md, old); | |
883 | } | |
82396986 | 884 | |
7143849a | 885 | if (atomic_read(&md->refcnt) == 1 && perf_mmap__empty(md)) |
82396986 | 886 | perf_evlist__mmap_put(evlist, idx); |
8e50d384 ZZ |
887 | } |
888 | ||
718c602d AH |
889 | int __weak auxtrace_mmap__mmap(struct auxtrace_mmap *mm __maybe_unused, |
890 | struct auxtrace_mmap_params *mp __maybe_unused, | |
891 | void *userpg __maybe_unused, | |
892 | int fd __maybe_unused) | |
893 | { | |
894 | return 0; | |
895 | } | |
896 | ||
897 | void __weak auxtrace_mmap__munmap(struct auxtrace_mmap *mm __maybe_unused) | |
898 | { | |
899 | } | |
900 | ||
901 | void __weak auxtrace_mmap_params__init( | |
902 | struct auxtrace_mmap_params *mp __maybe_unused, | |
903 | off_t auxtrace_offset __maybe_unused, | |
904 | unsigned int auxtrace_pages __maybe_unused, | |
905 | bool auxtrace_overwrite __maybe_unused) | |
906 | { | |
907 | } | |
908 | ||
909 | void __weak auxtrace_mmap_params__set_idx( | |
910 | struct auxtrace_mmap_params *mp __maybe_unused, | |
911 | struct perf_evlist *evlist __maybe_unused, | |
912 | int idx __maybe_unused, | |
913 | bool per_cpu __maybe_unused) | |
914 | { | |
915 | } | |
916 | ||
93edcbd9 AH |
917 | static void __perf_evlist__munmap(struct perf_evlist *evlist, int idx) |
918 | { | |
919 | if (evlist->mmap[idx].base != NULL) { | |
920 | munmap(evlist->mmap[idx].base, evlist->mmap_len); | |
921 | evlist->mmap[idx].base = NULL; | |
d4c6fb36 | 922 | evlist->mmap[idx].fd = -1; |
7143849a | 923 | atomic_set(&evlist->mmap[idx].refcnt, 0); |
93edcbd9 | 924 | } |
718c602d | 925 | auxtrace_mmap__munmap(&evlist->mmap[idx].auxtrace_mmap); |
93edcbd9 AH |
926 | } |
927 | ||
7e2ed097 | 928 | void perf_evlist__munmap(struct perf_evlist *evlist) |
f8a95309 | 929 | { |
aece948f | 930 | int i; |
f8a95309 | 931 | |
983874d1 ACM |
932 | if (evlist->mmap == NULL) |
933 | return; | |
934 | ||
93edcbd9 AH |
935 | for (i = 0; i < evlist->nr_mmaps; i++) |
936 | __perf_evlist__munmap(evlist, i); | |
aece948f | 937 | |
04662523 | 938 | zfree(&evlist->mmap); |
f8a95309 ACM |
939 | } |
940 | ||
806fb630 | 941 | static int perf_evlist__alloc_mmap(struct perf_evlist *evlist) |
f8a95309 | 942 | { |
d4c6fb36 WN |
943 | int i; |
944 | ||
a14bb7a6 | 945 | evlist->nr_mmaps = cpu_map__nr(evlist->cpus); |
ec1e7e43 | 946 | if (cpu_map__empty(evlist->cpus)) |
b3a319d5 | 947 | evlist->nr_mmaps = thread_map__nr(evlist->threads); |
aece948f | 948 | evlist->mmap = zalloc(evlist->nr_mmaps * sizeof(struct perf_mmap)); |
d4c6fb36 WN |
949 | for (i = 0; i < evlist->nr_mmaps; i++) |
950 | evlist->mmap[i].fd = -1; | |
f8a95309 ACM |
951 | return evlist->mmap != NULL ? 0 : -ENOMEM; |
952 | } | |
953 | ||
a8a8f3eb AH |
954 | struct mmap_params { |
955 | int prot; | |
956 | int mask; | |
718c602d | 957 | struct auxtrace_mmap_params auxtrace_mp; |
a8a8f3eb AH |
958 | }; |
959 | ||
960 | static int __perf_evlist__mmap(struct perf_evlist *evlist, int idx, | |
961 | struct mmap_params *mp, int fd) | |
f8a95309 | 962 | { |
82396986 ACM |
963 | /* |
964 | * The last one will be done at perf_evlist__mmap_consume(), so that we | |
965 | * make sure we don't prevent tools from consuming every last event in | |
966 | * the ring buffer. | |
967 | * | |
968 | * I.e. we can get the POLLHUP meaning that the fd doesn't exist | |
969 | * anymore, but the last events for it are still in the ring buffer, | |
970 | * waiting to be consumed. | |
971 | * | |
972 | * Tools can chose to ignore this at their own discretion, but the | |
973 | * evlist layer can't just drop it when filtering events in | |
974 | * perf_evlist__filter_pollfd(). | |
975 | */ | |
7143849a | 976 | atomic_set(&evlist->mmap[idx].refcnt, 2); |
aece948f | 977 | evlist->mmap[idx].prev = 0; |
a8a8f3eb AH |
978 | evlist->mmap[idx].mask = mp->mask; |
979 | evlist->mmap[idx].base = mmap(NULL, evlist->mmap_len, mp->prot, | |
f8a95309 | 980 | MAP_SHARED, fd, 0); |
301b195d | 981 | if (evlist->mmap[idx].base == MAP_FAILED) { |
02635965 AH |
982 | pr_debug2("failed to mmap perf event ring buffer, error %d\n", |
983 | errno); | |
301b195d | 984 | evlist->mmap[idx].base = NULL; |
f8a95309 | 985 | return -1; |
301b195d | 986 | } |
d4c6fb36 | 987 | evlist->mmap[idx].fd = fd; |
ad6765dd | 988 | |
718c602d AH |
989 | if (auxtrace_mmap__mmap(&evlist->mmap[idx].auxtrace_mmap, |
990 | &mp->auxtrace_mp, evlist->mmap[idx].base, fd)) | |
991 | return -1; | |
992 | ||
f8a95309 ACM |
993 | return 0; |
994 | } | |
995 | ||
f3058a1c WN |
996 | static bool |
997 | perf_evlist__should_poll(struct perf_evlist *evlist __maybe_unused, | |
998 | struct perf_evsel *evsel) | |
999 | { | |
1000 | if (evsel->overwrite) | |
1001 | return false; | |
1002 | return true; | |
1003 | } | |
1004 | ||
04e21314 | 1005 | static int perf_evlist__mmap_per_evsel(struct perf_evlist *evlist, int idx, |
a8a8f3eb AH |
1006 | struct mmap_params *mp, int cpu, |
1007 | int thread, int *output) | |
aece948f ACM |
1008 | { |
1009 | struct perf_evsel *evsel; | |
f3058a1c | 1010 | int revent; |
04e21314 | 1011 | |
0050f7aa | 1012 | evlist__for_each(evlist, evsel) { |
bf8e8f4b AH |
1013 | int fd; |
1014 | ||
f3058a1c WN |
1015 | if (evsel->overwrite != (evlist->overwrite && evlist->backward)) |
1016 | continue; | |
1017 | ||
bf8e8f4b AH |
1018 | if (evsel->system_wide && thread) |
1019 | continue; | |
1020 | ||
1021 | fd = FD(evsel, cpu, thread); | |
04e21314 AH |
1022 | |
1023 | if (*output == -1) { | |
1024 | *output = fd; | |
a8a8f3eb | 1025 | if (__perf_evlist__mmap(evlist, idx, mp, *output) < 0) |
04e21314 AH |
1026 | return -1; |
1027 | } else { | |
1028 | if (ioctl(fd, PERF_EVENT_IOC_SET_OUTPUT, *output) != 0) | |
1029 | return -1; | |
82396986 ACM |
1030 | |
1031 | perf_evlist__mmap_get(evlist, idx); | |
04e21314 AH |
1032 | } |
1033 | ||
f3058a1c WN |
1034 | revent = perf_evlist__should_poll(evlist, evsel) ? POLLIN : 0; |
1035 | ||
f90d194a AH |
1036 | /* |
1037 | * The system_wide flag causes a selected event to be opened | |
1038 | * always without a pid. Consequently it will never get a | |
1039 | * POLLHUP, but it is used for tracking in combination with | |
1040 | * other events, so it should not need to be polled anyway. | |
1041 | * Therefore don't add it for polling. | |
1042 | */ | |
1043 | if (!evsel->system_wide && | |
f3058a1c | 1044 | __perf_evlist__add_pollfd(evlist, fd, idx, revent) < 0) { |
82396986 | 1045 | perf_evlist__mmap_put(evlist, idx); |
ad6765dd | 1046 | return -1; |
82396986 | 1047 | } |
033fa713 | 1048 | |
3c659eed AH |
1049 | if (evsel->attr.read_format & PERF_FORMAT_ID) { |
1050 | if (perf_evlist__id_add_fd(evlist, evsel, cpu, thread, | |
1051 | fd) < 0) | |
1052 | return -1; | |
1053 | perf_evlist__set_sid_idx(evlist, evsel, idx, cpu, | |
1054 | thread); | |
1055 | } | |
04e21314 AH |
1056 | } |
1057 | ||
1058 | return 0; | |
1059 | } | |
1060 | ||
a8a8f3eb AH |
1061 | static int perf_evlist__mmap_per_cpu(struct perf_evlist *evlist, |
1062 | struct mmap_params *mp) | |
04e21314 | 1063 | { |
aece948f | 1064 | int cpu, thread; |
b3a319d5 NK |
1065 | int nr_cpus = cpu_map__nr(evlist->cpus); |
1066 | int nr_threads = thread_map__nr(evlist->threads); | |
aece948f | 1067 | |
e3e1a54f | 1068 | pr_debug2("perf event ring buffer mmapped per cpu\n"); |
b3a319d5 | 1069 | for (cpu = 0; cpu < nr_cpus; cpu++) { |
aece948f ACM |
1070 | int output = -1; |
1071 | ||
718c602d AH |
1072 | auxtrace_mmap_params__set_idx(&mp->auxtrace_mp, evlist, cpu, |
1073 | true); | |
1074 | ||
b3a319d5 | 1075 | for (thread = 0; thread < nr_threads; thread++) { |
a8a8f3eb AH |
1076 | if (perf_evlist__mmap_per_evsel(evlist, cpu, mp, cpu, |
1077 | thread, &output)) | |
04e21314 | 1078 | goto out_unmap; |
aece948f ACM |
1079 | } |
1080 | } | |
1081 | ||
1082 | return 0; | |
1083 | ||
1084 | out_unmap: | |
93edcbd9 AH |
1085 | for (cpu = 0; cpu < nr_cpus; cpu++) |
1086 | __perf_evlist__munmap(evlist, cpu); | |
aece948f ACM |
1087 | return -1; |
1088 | } | |
1089 | ||
a8a8f3eb AH |
1090 | static int perf_evlist__mmap_per_thread(struct perf_evlist *evlist, |
1091 | struct mmap_params *mp) | |
aece948f | 1092 | { |
aece948f | 1093 | int thread; |
b3a319d5 | 1094 | int nr_threads = thread_map__nr(evlist->threads); |
aece948f | 1095 | |
e3e1a54f | 1096 | pr_debug2("perf event ring buffer mmapped per thread\n"); |
b3a319d5 | 1097 | for (thread = 0; thread < nr_threads; thread++) { |
aece948f ACM |
1098 | int output = -1; |
1099 | ||
718c602d AH |
1100 | auxtrace_mmap_params__set_idx(&mp->auxtrace_mp, evlist, thread, |
1101 | false); | |
1102 | ||
a8a8f3eb AH |
1103 | if (perf_evlist__mmap_per_evsel(evlist, thread, mp, 0, thread, |
1104 | &output)) | |
04e21314 | 1105 | goto out_unmap; |
aece948f ACM |
1106 | } |
1107 | ||
1108 | return 0; | |
1109 | ||
1110 | out_unmap: | |
93edcbd9 AH |
1111 | for (thread = 0; thread < nr_threads; thread++) |
1112 | __perf_evlist__munmap(evlist, thread); | |
aece948f ACM |
1113 | return -1; |
1114 | } | |
1115 | ||
f5e7150c | 1116 | unsigned long perf_event_mlock_kb_in_pages(void) |
994a1f78 | 1117 | { |
f5e7150c ACM |
1118 | unsigned long pages; |
1119 | int max; | |
8185e881 | 1120 | |
f5e7150c ACM |
1121 | if (sysctl__read_int("kernel/perf_event_mlock_kb", &max) < 0) { |
1122 | /* | |
1123 | * Pick a once upon a time good value, i.e. things look | |
1124 | * strange since we can't read a sysctl value, but lets not | |
1125 | * die yet... | |
1126 | */ | |
1127 | max = 512; | |
1128 | } else { | |
1129 | max -= (page_size / 1024); | |
1130 | } | |
8185e881 | 1131 | |
f5e7150c ACM |
1132 | pages = (max * 1024) / page_size; |
1133 | if (!is_power_of_2(pages)) | |
1134 | pages = rounddown_pow_of_two(pages); | |
1135 | ||
1136 | return pages; | |
1137 | } | |
1138 | ||
1139 | static size_t perf_evlist__mmap_size(unsigned long pages) | |
1140 | { | |
1141 | if (pages == UINT_MAX) | |
1142 | pages = perf_event_mlock_kb_in_pages(); | |
1143 | else if (!is_power_of_2(pages)) | |
994a1f78 JO |
1144 | return 0; |
1145 | ||
1146 | return (pages + 1) * page_size; | |
1147 | } | |
1148 | ||
33c2dcfd DA |
1149 | static long parse_pages_arg(const char *str, unsigned long min, |
1150 | unsigned long max) | |
994a1f78 | 1151 | { |
2fbe4abe | 1152 | unsigned long pages, val; |
27050f53 JO |
1153 | static struct parse_tag tags[] = { |
1154 | { .tag = 'B', .mult = 1 }, | |
1155 | { .tag = 'K', .mult = 1 << 10 }, | |
1156 | { .tag = 'M', .mult = 1 << 20 }, | |
1157 | { .tag = 'G', .mult = 1 << 30 }, | |
1158 | { .tag = 0 }, | |
1159 | }; | |
994a1f78 | 1160 | |
8973504b | 1161 | if (str == NULL) |
33c2dcfd | 1162 | return -EINVAL; |
8973504b | 1163 | |
27050f53 | 1164 | val = parse_tag_value(str, tags); |
2fbe4abe | 1165 | if (val != (unsigned long) -1) { |
27050f53 JO |
1166 | /* we got file size value */ |
1167 | pages = PERF_ALIGN(val, page_size) / page_size; | |
27050f53 JO |
1168 | } else { |
1169 | /* we got pages count value */ | |
1170 | char *eptr; | |
1171 | pages = strtoul(str, &eptr, 10); | |
33c2dcfd DA |
1172 | if (*eptr != '\0') |
1173 | return -EINVAL; | |
994a1f78 JO |
1174 | } |
1175 | ||
2bcab6c1 | 1176 | if (pages == 0 && min == 0) { |
33c2dcfd | 1177 | /* leave number of pages at 0 */ |
1dbfa938 | 1178 | } else if (!is_power_of_2(pages)) { |
33c2dcfd | 1179 | /* round pages up to next power of 2 */ |
91529834 | 1180 | pages = roundup_pow_of_two(pages); |
1dbfa938 AH |
1181 | if (!pages) |
1182 | return -EINVAL; | |
9639837e DA |
1183 | pr_info("rounding mmap pages size to %lu bytes (%lu pages)\n", |
1184 | pages * page_size, pages); | |
2fbe4abe AH |
1185 | } |
1186 | ||
33c2dcfd DA |
1187 | if (pages > max) |
1188 | return -EINVAL; | |
1189 | ||
1190 | return pages; | |
1191 | } | |
1192 | ||
e9db1310 | 1193 | int __perf_evlist__parse_mmap_pages(unsigned int *mmap_pages, const char *str) |
33c2dcfd | 1194 | { |
33c2dcfd DA |
1195 | unsigned long max = UINT_MAX; |
1196 | long pages; | |
1197 | ||
f5ae9c42 | 1198 | if (max > SIZE_MAX / page_size) |
33c2dcfd DA |
1199 | max = SIZE_MAX / page_size; |
1200 | ||
1201 | pages = parse_pages_arg(str, 1, max); | |
1202 | if (pages < 0) { | |
1203 | pr_err("Invalid argument for --mmap_pages/-m\n"); | |
994a1f78 JO |
1204 | return -1; |
1205 | } | |
1206 | ||
1207 | *mmap_pages = pages; | |
1208 | return 0; | |
1209 | } | |
1210 | ||
e9db1310 AH |
1211 | int perf_evlist__parse_mmap_pages(const struct option *opt, const char *str, |
1212 | int unset __maybe_unused) | |
1213 | { | |
1214 | return __perf_evlist__parse_mmap_pages(opt->value, str); | |
1215 | } | |
1216 | ||
c83fa7f2 | 1217 | /** |
718c602d | 1218 | * perf_evlist__mmap_ex - Create mmaps to receive events. |
c83fa7f2 AH |
1219 | * @evlist: list of events |
1220 | * @pages: map length in pages | |
1221 | * @overwrite: overwrite older events? | |
718c602d AH |
1222 | * @auxtrace_pages - auxtrace map length in pages |
1223 | * @auxtrace_overwrite - overwrite older auxtrace data? | |
f8a95309 | 1224 | * |
c83fa7f2 AH |
1225 | * If @overwrite is %false the user needs to signal event consumption using |
1226 | * perf_mmap__write_tail(). Using perf_evlist__mmap_read() does this | |
1227 | * automatically. | |
7e2ed097 | 1228 | * |
718c602d AH |
1229 | * Similarly, if @auxtrace_overwrite is %false the user needs to signal data |
1230 | * consumption using auxtrace_mmap__write_tail(). | |
1231 | * | |
c83fa7f2 | 1232 | * Return: %0 on success, negative error code otherwise. |
f8a95309 | 1233 | */ |
718c602d AH |
1234 | int perf_evlist__mmap_ex(struct perf_evlist *evlist, unsigned int pages, |
1235 | bool overwrite, unsigned int auxtrace_pages, | |
1236 | bool auxtrace_overwrite) | |
f8a95309 | 1237 | { |
aece948f | 1238 | struct perf_evsel *evsel; |
7e2ed097 ACM |
1239 | const struct cpu_map *cpus = evlist->cpus; |
1240 | const struct thread_map *threads = evlist->threads; | |
a8a8f3eb AH |
1241 | struct mmap_params mp = { |
1242 | .prot = PROT_READ | (overwrite ? 0 : PROT_WRITE), | |
1243 | }; | |
50a682ce | 1244 | |
7e2ed097 | 1245 | if (evlist->mmap == NULL && perf_evlist__alloc_mmap(evlist) < 0) |
f8a95309 ACM |
1246 | return -ENOMEM; |
1247 | ||
1b85337d | 1248 | if (evlist->pollfd.entries == NULL && perf_evlist__alloc_pollfd(evlist) < 0) |
f8a95309 ACM |
1249 | return -ENOMEM; |
1250 | ||
1251 | evlist->overwrite = overwrite; | |
994a1f78 | 1252 | evlist->mmap_len = perf_evlist__mmap_size(pages); |
2af68ef5 | 1253 | pr_debug("mmap size %zuB\n", evlist->mmap_len); |
a8a8f3eb | 1254 | mp.mask = evlist->mmap_len - page_size - 1; |
f8a95309 | 1255 | |
718c602d AH |
1256 | auxtrace_mmap_params__init(&mp.auxtrace_mp, evlist->mmap_len, |
1257 | auxtrace_pages, auxtrace_overwrite); | |
1258 | ||
0050f7aa | 1259 | evlist__for_each(evlist, evsel) { |
f8a95309 | 1260 | if ((evsel->attr.read_format & PERF_FORMAT_ID) && |
a91e5431 | 1261 | evsel->sample_id == NULL && |
a14bb7a6 | 1262 | perf_evsel__alloc_id(evsel, cpu_map__nr(cpus), threads->nr) < 0) |
f8a95309 | 1263 | return -ENOMEM; |
f8a95309 ACM |
1264 | } |
1265 | ||
ec1e7e43 | 1266 | if (cpu_map__empty(cpus)) |
a8a8f3eb | 1267 | return perf_evlist__mmap_per_thread(evlist, &mp); |
f8a95309 | 1268 | |
a8a8f3eb | 1269 | return perf_evlist__mmap_per_cpu(evlist, &mp); |
f8a95309 | 1270 | } |
7e2ed097 | 1271 | |
718c602d AH |
1272 | int perf_evlist__mmap(struct perf_evlist *evlist, unsigned int pages, |
1273 | bool overwrite) | |
1274 | { | |
1275 | return perf_evlist__mmap_ex(evlist, pages, overwrite, 0, false); | |
1276 | } | |
1277 | ||
602ad878 | 1278 | int perf_evlist__create_maps(struct perf_evlist *evlist, struct target *target) |
7e2ed097 | 1279 | { |
74bfd2b2 AH |
1280 | struct cpu_map *cpus; |
1281 | struct thread_map *threads; | |
7e2ed097 | 1282 | |
74bfd2b2 | 1283 | threads = thread_map__new_str(target->pid, target->tid, target->uid); |
7e2ed097 | 1284 | |
74bfd2b2 | 1285 | if (!threads) |
7e2ed097 ACM |
1286 | return -1; |
1287 | ||
9c105fbc | 1288 | if (target__uses_dummy_map(target)) |
74bfd2b2 | 1289 | cpus = cpu_map__dummy_new(); |
879d77d0 | 1290 | else |
74bfd2b2 | 1291 | cpus = cpu_map__new(target->cpu_list); |
7e2ed097 | 1292 | |
74bfd2b2 | 1293 | if (!cpus) |
7e2ed097 ACM |
1294 | goto out_delete_threads; |
1295 | ||
ec9a77a7 AH |
1296 | evlist->has_user_cpus = !!target->cpu_list; |
1297 | ||
74bfd2b2 | 1298 | perf_evlist__set_maps(evlist, cpus, threads); |
d5bc056e AH |
1299 | |
1300 | return 0; | |
7e2ed097 ACM |
1301 | |
1302 | out_delete_threads: | |
74bfd2b2 | 1303 | thread_map__put(threads); |
7e2ed097 ACM |
1304 | return -1; |
1305 | } | |
1306 | ||
d5bc056e AH |
1307 | void perf_evlist__set_maps(struct perf_evlist *evlist, struct cpu_map *cpus, |
1308 | struct thread_map *threads) | |
3de5cfb0 | 1309 | { |
934e0f20 AH |
1310 | /* |
1311 | * Allow for the possibility that one or another of the maps isn't being | |
1312 | * changed i.e. don't put it. Note we are assuming the maps that are | |
1313 | * being applied are brand new and evlist is taking ownership of the | |
1314 | * original reference count of 1. If that is not the case it is up to | |
1315 | * the caller to increase the reference count. | |
1316 | */ | |
1317 | if (cpus != evlist->cpus) { | |
3de5cfb0 | 1318 | cpu_map__put(evlist->cpus); |
a55e5663 | 1319 | evlist->cpus = cpu_map__get(cpus); |
934e0f20 | 1320 | } |
3de5cfb0 | 1321 | |
934e0f20 | 1322 | if (threads != evlist->threads) { |
3de5cfb0 | 1323 | thread_map__put(evlist->threads); |
a55e5663 | 1324 | evlist->threads = thread_map__get(threads); |
934e0f20 | 1325 | } |
3de5cfb0 | 1326 | |
ec9a77a7 | 1327 | perf_evlist__propagate_maps(evlist); |
3de5cfb0 JO |
1328 | } |
1329 | ||
22c8a376 ACM |
1330 | void __perf_evlist__set_sample_bit(struct perf_evlist *evlist, |
1331 | enum perf_event_sample_format bit) | |
1332 | { | |
1333 | struct perf_evsel *evsel; | |
1334 | ||
1335 | evlist__for_each(evlist, evsel) | |
1336 | __perf_evsel__set_sample_bit(evsel, bit); | |
1337 | } | |
1338 | ||
1339 | void __perf_evlist__reset_sample_bit(struct perf_evlist *evlist, | |
1340 | enum perf_event_sample_format bit) | |
1341 | { | |
1342 | struct perf_evsel *evsel; | |
1343 | ||
1344 | evlist__for_each(evlist, evsel) | |
1345 | __perf_evsel__reset_sample_bit(evsel, bit); | |
1346 | } | |
1347 | ||
23d4aad4 | 1348 | int perf_evlist__apply_filters(struct perf_evlist *evlist, struct perf_evsel **err_evsel) |
0a102479 | 1349 | { |
0a102479 | 1350 | struct perf_evsel *evsel; |
745cefc5 ACM |
1351 | int err = 0; |
1352 | const int ncpus = cpu_map__nr(evlist->cpus), | |
b3a319d5 | 1353 | nthreads = thread_map__nr(evlist->threads); |
0a102479 | 1354 | |
0050f7aa | 1355 | evlist__for_each(evlist, evsel) { |
745cefc5 | 1356 | if (evsel->filter == NULL) |
0a102479 | 1357 | continue; |
745cefc5 | 1358 | |
d988d5ee KL |
1359 | /* |
1360 | * filters only work for tracepoint event, which doesn't have cpu limit. | |
1361 | * So evlist and evsel should always be same. | |
1362 | */ | |
f47805a2 | 1363 | err = perf_evsel__apply_filter(evsel, ncpus, nthreads, evsel->filter); |
23d4aad4 ACM |
1364 | if (err) { |
1365 | *err_evsel = evsel; | |
745cefc5 | 1366 | break; |
23d4aad4 | 1367 | } |
0a102479 FW |
1368 | } |
1369 | ||
745cefc5 ACM |
1370 | return err; |
1371 | } | |
1372 | ||
1373 | int perf_evlist__set_filter(struct perf_evlist *evlist, const char *filter) | |
1374 | { | |
1375 | struct perf_evsel *evsel; | |
1376 | int err = 0; | |
745cefc5 | 1377 | |
0050f7aa | 1378 | evlist__for_each(evlist, evsel) { |
fdf14720 WN |
1379 | if (evsel->attr.type != PERF_TYPE_TRACEPOINT) |
1380 | continue; | |
1381 | ||
94ad89bc | 1382 | err = perf_evsel__set_filter(evsel, filter); |
745cefc5 ACM |
1383 | if (err) |
1384 | break; | |
1385 | } | |
1386 | ||
1387 | return err; | |
0a102479 | 1388 | } |
74429964 | 1389 | |
be199ada | 1390 | int perf_evlist__set_filter_pids(struct perf_evlist *evlist, size_t npids, pid_t *pids) |
cfd70a26 ACM |
1391 | { |
1392 | char *filter; | |
be199ada ACM |
1393 | int ret = -1; |
1394 | size_t i; | |
cfd70a26 | 1395 | |
be199ada ACM |
1396 | for (i = 0; i < npids; ++i) { |
1397 | if (i == 0) { | |
1398 | if (asprintf(&filter, "common_pid != %d", pids[i]) < 0) | |
1399 | return -1; | |
1400 | } else { | |
1401 | char *tmp; | |
1402 | ||
1403 | if (asprintf(&tmp, "%s && common_pid != %d", filter, pids[i]) < 0) | |
1404 | goto out_free; | |
1405 | ||
1406 | free(filter); | |
1407 | filter = tmp; | |
1408 | } | |
1409 | } | |
cfd70a26 ACM |
1410 | |
1411 | ret = perf_evlist__set_filter(evlist, filter); | |
be199ada | 1412 | out_free: |
cfd70a26 ACM |
1413 | free(filter); |
1414 | return ret; | |
1415 | } | |
1416 | ||
be199ada ACM |
1417 | int perf_evlist__set_filter_pid(struct perf_evlist *evlist, pid_t pid) |
1418 | { | |
1419 | return perf_evlist__set_filter_pids(evlist, 1, &pid); | |
1420 | } | |
1421 | ||
0c21f736 | 1422 | bool perf_evlist__valid_sample_type(struct perf_evlist *evlist) |
74429964 | 1423 | { |
75562573 | 1424 | struct perf_evsel *pos; |
c2a70653 | 1425 | |
75562573 AH |
1426 | if (evlist->nr_entries == 1) |
1427 | return true; | |
1428 | ||
1429 | if (evlist->id_pos < 0 || evlist->is_pos < 0) | |
1430 | return false; | |
1431 | ||
0050f7aa | 1432 | evlist__for_each(evlist, pos) { |
75562573 AH |
1433 | if (pos->id_pos != evlist->id_pos || |
1434 | pos->is_pos != evlist->is_pos) | |
c2a70653 | 1435 | return false; |
74429964 FW |
1436 | } |
1437 | ||
c2a70653 | 1438 | return true; |
74429964 FW |
1439 | } |
1440 | ||
75562573 | 1441 | u64 __perf_evlist__combined_sample_type(struct perf_evlist *evlist) |
c2a70653 | 1442 | { |
75562573 AH |
1443 | struct perf_evsel *evsel; |
1444 | ||
1445 | if (evlist->combined_sample_type) | |
1446 | return evlist->combined_sample_type; | |
1447 | ||
0050f7aa | 1448 | evlist__for_each(evlist, evsel) |
75562573 AH |
1449 | evlist->combined_sample_type |= evsel->attr.sample_type; |
1450 | ||
1451 | return evlist->combined_sample_type; | |
1452 | } | |
1453 | ||
1454 | u64 perf_evlist__combined_sample_type(struct perf_evlist *evlist) | |
1455 | { | |
1456 | evlist->combined_sample_type = 0; | |
1457 | return __perf_evlist__combined_sample_type(evlist); | |
c2a70653 ACM |
1458 | } |
1459 | ||
98df858e AK |
1460 | u64 perf_evlist__combined_branch_type(struct perf_evlist *evlist) |
1461 | { | |
1462 | struct perf_evsel *evsel; | |
1463 | u64 branch_type = 0; | |
1464 | ||
1465 | evlist__for_each(evlist, evsel) | |
1466 | branch_type |= evsel->attr.branch_sample_type; | |
1467 | return branch_type; | |
1468 | } | |
1469 | ||
9ede473c JO |
1470 | bool perf_evlist__valid_read_format(struct perf_evlist *evlist) |
1471 | { | |
1472 | struct perf_evsel *first = perf_evlist__first(evlist), *pos = first; | |
1473 | u64 read_format = first->attr.read_format; | |
1474 | u64 sample_type = first->attr.sample_type; | |
1475 | ||
0050f7aa | 1476 | evlist__for_each(evlist, pos) { |
9ede473c JO |
1477 | if (read_format != pos->attr.read_format) |
1478 | return false; | |
1479 | } | |
1480 | ||
1481 | /* PERF_SAMPLE_READ imples PERF_FORMAT_ID. */ | |
1482 | if ((sample_type & PERF_SAMPLE_READ) && | |
1483 | !(read_format & PERF_FORMAT_ID)) { | |
1484 | return false; | |
1485 | } | |
1486 | ||
1487 | return true; | |
1488 | } | |
1489 | ||
1490 | u64 perf_evlist__read_format(struct perf_evlist *evlist) | |
1491 | { | |
1492 | struct perf_evsel *first = perf_evlist__first(evlist); | |
1493 | return first->attr.read_format; | |
1494 | } | |
1495 | ||
0c21f736 | 1496 | u16 perf_evlist__id_hdr_size(struct perf_evlist *evlist) |
81e36bff | 1497 | { |
0c21f736 | 1498 | struct perf_evsel *first = perf_evlist__first(evlist); |
81e36bff ACM |
1499 | struct perf_sample *data; |
1500 | u64 sample_type; | |
1501 | u16 size = 0; | |
1502 | ||
81e36bff ACM |
1503 | if (!first->attr.sample_id_all) |
1504 | goto out; | |
1505 | ||
1506 | sample_type = first->attr.sample_type; | |
1507 | ||
1508 | if (sample_type & PERF_SAMPLE_TID) | |
1509 | size += sizeof(data->tid) * 2; | |
1510 | ||
1511 | if (sample_type & PERF_SAMPLE_TIME) | |
1512 | size += sizeof(data->time); | |
1513 | ||
1514 | if (sample_type & PERF_SAMPLE_ID) | |
1515 | size += sizeof(data->id); | |
1516 | ||
1517 | if (sample_type & PERF_SAMPLE_STREAM_ID) | |
1518 | size += sizeof(data->stream_id); | |
1519 | ||
1520 | if (sample_type & PERF_SAMPLE_CPU) | |
1521 | size += sizeof(data->cpu) * 2; | |
75562573 AH |
1522 | |
1523 | if (sample_type & PERF_SAMPLE_IDENTIFIER) | |
1524 | size += sizeof(data->id); | |
81e36bff ACM |
1525 | out: |
1526 | return size; | |
1527 | } | |
1528 | ||
0c21f736 | 1529 | bool perf_evlist__valid_sample_id_all(struct perf_evlist *evlist) |
74429964 | 1530 | { |
0c21f736 | 1531 | struct perf_evsel *first = perf_evlist__first(evlist), *pos = first; |
c2a70653 | 1532 | |
0050f7aa | 1533 | evlist__for_each_continue(evlist, pos) { |
c2a70653 ACM |
1534 | if (first->attr.sample_id_all != pos->attr.sample_id_all) |
1535 | return false; | |
74429964 FW |
1536 | } |
1537 | ||
c2a70653 ACM |
1538 | return true; |
1539 | } | |
1540 | ||
0c21f736 | 1541 | bool perf_evlist__sample_id_all(struct perf_evlist *evlist) |
c2a70653 | 1542 | { |
0c21f736 | 1543 | struct perf_evsel *first = perf_evlist__first(evlist); |
c2a70653 | 1544 | return first->attr.sample_id_all; |
74429964 | 1545 | } |
81cce8de ACM |
1546 | |
1547 | void perf_evlist__set_selected(struct perf_evlist *evlist, | |
1548 | struct perf_evsel *evsel) | |
1549 | { | |
1550 | evlist->selected = evsel; | |
1551 | } | |
727ab04e | 1552 | |
a74b4b66 NK |
1553 | void perf_evlist__close(struct perf_evlist *evlist) |
1554 | { | |
1555 | struct perf_evsel *evsel; | |
1556 | int ncpus = cpu_map__nr(evlist->cpus); | |
1557 | int nthreads = thread_map__nr(evlist->threads); | |
8ad9219e | 1558 | int n; |
a74b4b66 | 1559 | |
8ad9219e SE |
1560 | evlist__for_each_reverse(evlist, evsel) { |
1561 | n = evsel->cpus ? evsel->cpus->nr : ncpus; | |
1562 | perf_evsel__close(evsel, n, nthreads); | |
1563 | } | |
a74b4b66 NK |
1564 | } |
1565 | ||
4112eb18 ACM |
1566 | static int perf_evlist__create_syswide_maps(struct perf_evlist *evlist) |
1567 | { | |
8c0498b6 AH |
1568 | struct cpu_map *cpus; |
1569 | struct thread_map *threads; | |
4112eb18 ACM |
1570 | int err = -ENOMEM; |
1571 | ||
1572 | /* | |
1573 | * Try reading /sys/devices/system/cpu/online to get | |
1574 | * an all cpus map. | |
1575 | * | |
1576 | * FIXME: -ENOMEM is the best we can do here, the cpu_map | |
1577 | * code needs an overhaul to properly forward the | |
1578 | * error, and we may not want to do that fallback to a | |
1579 | * default cpu identity map :-\ | |
1580 | */ | |
8c0498b6 AH |
1581 | cpus = cpu_map__new(NULL); |
1582 | if (!cpus) | |
4112eb18 ACM |
1583 | goto out; |
1584 | ||
8c0498b6 AH |
1585 | threads = thread_map__new_dummy(); |
1586 | if (!threads) | |
1587 | goto out_put; | |
4112eb18 | 1588 | |
8c0498b6 | 1589 | perf_evlist__set_maps(evlist, cpus, threads); |
4112eb18 ACM |
1590 | out: |
1591 | return err; | |
8c0498b6 AH |
1592 | out_put: |
1593 | cpu_map__put(cpus); | |
4112eb18 ACM |
1594 | goto out; |
1595 | } | |
1596 | ||
6a4bb04c | 1597 | int perf_evlist__open(struct perf_evlist *evlist) |
727ab04e | 1598 | { |
6a4bb04c | 1599 | struct perf_evsel *evsel; |
a74b4b66 | 1600 | int err; |
727ab04e | 1601 | |
4112eb18 ACM |
1602 | /* |
1603 | * Default: one fd per CPU, all threads, aka systemwide | |
1604 | * as sys_perf_event_open(cpu = -1, thread = -1) is EINVAL | |
1605 | */ | |
1606 | if (evlist->threads == NULL && evlist->cpus == NULL) { | |
1607 | err = perf_evlist__create_syswide_maps(evlist); | |
1608 | if (err < 0) | |
1609 | goto out_err; | |
1610 | } | |
1611 | ||
733cd2fe AH |
1612 | perf_evlist__update_id_pos(evlist); |
1613 | ||
0050f7aa | 1614 | evlist__for_each(evlist, evsel) { |
23df7f79 | 1615 | err = perf_evsel__open(evsel, evsel->cpus, evsel->threads); |
727ab04e ACM |
1616 | if (err < 0) |
1617 | goto out_err; | |
1618 | } | |
1619 | ||
1620 | return 0; | |
1621 | out_err: | |
a74b4b66 | 1622 | perf_evlist__close(evlist); |
41c21a68 | 1623 | errno = -err; |
727ab04e ACM |
1624 | return err; |
1625 | } | |
35b9d88e | 1626 | |
602ad878 | 1627 | int perf_evlist__prepare_workload(struct perf_evlist *evlist, struct target *target, |
55e162ea | 1628 | const char *argv[], bool pipe_output, |
735f7e0b | 1629 | void (*exec_error)(int signo, siginfo_t *info, void *ucontext)) |
35b9d88e ACM |
1630 | { |
1631 | int child_ready_pipe[2], go_pipe[2]; | |
1632 | char bf; | |
1633 | ||
1634 | if (pipe(child_ready_pipe) < 0) { | |
1635 | perror("failed to create 'ready' pipe"); | |
1636 | return -1; | |
1637 | } | |
1638 | ||
1639 | if (pipe(go_pipe) < 0) { | |
1640 | perror("failed to create 'go' pipe"); | |
1641 | goto out_close_ready_pipe; | |
1642 | } | |
1643 | ||
1644 | evlist->workload.pid = fork(); | |
1645 | if (evlist->workload.pid < 0) { | |
1646 | perror("failed to fork"); | |
1647 | goto out_close_pipes; | |
1648 | } | |
1649 | ||
1650 | if (!evlist->workload.pid) { | |
5f1c4225 ACM |
1651 | int ret; |
1652 | ||
119fa3c9 | 1653 | if (pipe_output) |
35b9d88e ACM |
1654 | dup2(2, 1); |
1655 | ||
0817df08 DA |
1656 | signal(SIGTERM, SIG_DFL); |
1657 | ||
35b9d88e ACM |
1658 | close(child_ready_pipe[0]); |
1659 | close(go_pipe[1]); | |
1660 | fcntl(go_pipe[0], F_SETFD, FD_CLOEXEC); | |
1661 | ||
35b9d88e ACM |
1662 | /* |
1663 | * Tell the parent we're ready to go | |
1664 | */ | |
1665 | close(child_ready_pipe[1]); | |
1666 | ||
1667 | /* | |
1668 | * Wait until the parent tells us to go. | |
1669 | */ | |
5f1c4225 ACM |
1670 | ret = read(go_pipe[0], &bf, 1); |
1671 | /* | |
1672 | * The parent will ask for the execvp() to be performed by | |
1673 | * writing exactly one byte, in workload.cork_fd, usually via | |
1674 | * perf_evlist__start_workload(). | |
1675 | * | |
20f86fc1 | 1676 | * For cancelling the workload without actually running it, |
5f1c4225 ACM |
1677 | * the parent will just close workload.cork_fd, without writing |
1678 | * anything, i.e. read will return zero and we just exit() | |
1679 | * here. | |
1680 | */ | |
1681 | if (ret != 1) { | |
1682 | if (ret == -1) | |
1683 | perror("unable to read pipe"); | |
1684 | exit(ret); | |
1685 | } | |
35b9d88e ACM |
1686 | |
1687 | execvp(argv[0], (char **)argv); | |
1688 | ||
735f7e0b | 1689 | if (exec_error) { |
f33cbe72 ACM |
1690 | union sigval val; |
1691 | ||
1692 | val.sival_int = errno; | |
1693 | if (sigqueue(getppid(), SIGUSR1, val)) | |
1694 | perror(argv[0]); | |
1695 | } else | |
1696 | perror(argv[0]); | |
35b9d88e ACM |
1697 | exit(-1); |
1698 | } | |
1699 | ||
735f7e0b ACM |
1700 | if (exec_error) { |
1701 | struct sigaction act = { | |
1702 | .sa_flags = SA_SIGINFO, | |
1703 | .sa_sigaction = exec_error, | |
1704 | }; | |
1705 | sigaction(SIGUSR1, &act, NULL); | |
1706 | } | |
1707 | ||
1aaf63b1 ACM |
1708 | if (target__none(target)) { |
1709 | if (evlist->threads == NULL) { | |
1710 | fprintf(stderr, "FATAL: evlist->threads need to be set at this point (%s:%d).\n", | |
1711 | __func__, __LINE__); | |
1712 | goto out_close_pipes; | |
1713 | } | |
e13798c7 | 1714 | thread_map__set_pid(evlist->threads, 0, evlist->workload.pid); |
1aaf63b1 | 1715 | } |
35b9d88e ACM |
1716 | |
1717 | close(child_ready_pipe[1]); | |
1718 | close(go_pipe[0]); | |
1719 | /* | |
1720 | * wait for child to settle | |
1721 | */ | |
1722 | if (read(child_ready_pipe[0], &bf, 1) == -1) { | |
1723 | perror("unable to read pipe"); | |
1724 | goto out_close_pipes; | |
1725 | } | |
1726 | ||
bcf3145f | 1727 | fcntl(go_pipe[1], F_SETFD, FD_CLOEXEC); |
35b9d88e ACM |
1728 | evlist->workload.cork_fd = go_pipe[1]; |
1729 | close(child_ready_pipe[0]); | |
1730 | return 0; | |
1731 | ||
1732 | out_close_pipes: | |
1733 | close(go_pipe[0]); | |
1734 | close(go_pipe[1]); | |
1735 | out_close_ready_pipe: | |
1736 | close(child_ready_pipe[0]); | |
1737 | close(child_ready_pipe[1]); | |
1738 | return -1; | |
1739 | } | |
1740 | ||
1741 | int perf_evlist__start_workload(struct perf_evlist *evlist) | |
1742 | { | |
1743 | if (evlist->workload.cork_fd > 0) { | |
b3824404 | 1744 | char bf = 0; |
bcf3145f | 1745 | int ret; |
35b9d88e ACM |
1746 | /* |
1747 | * Remove the cork, let it rip! | |
1748 | */ | |
bcf3145f NK |
1749 | ret = write(evlist->workload.cork_fd, &bf, 1); |
1750 | if (ret < 0) | |
1751 | perror("enable to write to pipe"); | |
1752 | ||
1753 | close(evlist->workload.cork_fd); | |
1754 | return ret; | |
35b9d88e ACM |
1755 | } |
1756 | ||
1757 | return 0; | |
1758 | } | |
cb0b29e0 | 1759 | |
a3f698fe | 1760 | int perf_evlist__parse_sample(struct perf_evlist *evlist, union perf_event *event, |
0807d2d8 | 1761 | struct perf_sample *sample) |
cb0b29e0 | 1762 | { |
75562573 AH |
1763 | struct perf_evsel *evsel = perf_evlist__event2evsel(evlist, event); |
1764 | ||
1765 | if (!evsel) | |
1766 | return -EFAULT; | |
0807d2d8 | 1767 | return perf_evsel__parse_sample(evsel, event, sample); |
cb0b29e0 | 1768 | } |
78f067b3 ACM |
1769 | |
1770 | size_t perf_evlist__fprintf(struct perf_evlist *evlist, FILE *fp) | |
1771 | { | |
1772 | struct perf_evsel *evsel; | |
1773 | size_t printed = 0; | |
1774 | ||
0050f7aa | 1775 | evlist__for_each(evlist, evsel) { |
78f067b3 ACM |
1776 | printed += fprintf(fp, "%s%s", evsel->idx ? ", " : "", |
1777 | perf_evsel__name(evsel)); | |
1778 | } | |
1779 | ||
b2222139 | 1780 | return printed + fprintf(fp, "\n"); |
78f067b3 | 1781 | } |
6ef068cb | 1782 | |
d9aade7f | 1783 | int perf_evlist__strerror_open(struct perf_evlist *evlist, |
a8f23d8f ACM |
1784 | int err, char *buf, size_t size) |
1785 | { | |
1786 | int printed, value; | |
6e81c74c | 1787 | char sbuf[STRERR_BUFSIZE], *emsg = strerror_r(err, sbuf, sizeof(sbuf)); |
a8f23d8f ACM |
1788 | |
1789 | switch (err) { | |
1790 | case EACCES: | |
1791 | case EPERM: | |
1792 | printed = scnprintf(buf, size, | |
1793 | "Error:\t%s.\n" | |
1794 | "Hint:\tCheck /proc/sys/kernel/perf_event_paranoid setting.", emsg); | |
1795 | ||
1a47245d | 1796 | value = perf_event_paranoid(); |
a8f23d8f ACM |
1797 | |
1798 | printed += scnprintf(buf + printed, size - printed, "\nHint:\t"); | |
1799 | ||
1800 | if (value >= 2) { | |
1801 | printed += scnprintf(buf + printed, size - printed, | |
1802 | "For your workloads it needs to be <= 1\nHint:\t"); | |
1803 | } | |
1804 | printed += scnprintf(buf + printed, size - printed, | |
5229e366 | 1805 | "For system wide tracing it needs to be set to -1.\n"); |
a8f23d8f ACM |
1806 | |
1807 | printed += scnprintf(buf + printed, size - printed, | |
5229e366 ACM |
1808 | "Hint:\tTry: 'sudo sh -c \"echo -1 > /proc/sys/kernel/perf_event_paranoid\"'\n" |
1809 | "Hint:\tThe current value is %d.", value); | |
a8f23d8f | 1810 | break; |
d9aade7f ACM |
1811 | case EINVAL: { |
1812 | struct perf_evsel *first = perf_evlist__first(evlist); | |
1813 | int max_freq; | |
1814 | ||
1815 | if (sysctl__read_int("kernel/perf_event_max_sample_rate", &max_freq) < 0) | |
1816 | goto out_default; | |
1817 | ||
1818 | if (first->attr.sample_freq < (u64)max_freq) | |
1819 | goto out_default; | |
1820 | ||
1821 | printed = scnprintf(buf, size, | |
1822 | "Error:\t%s.\n" | |
1823 | "Hint:\tCheck /proc/sys/kernel/perf_event_max_sample_rate.\n" | |
1824 | "Hint:\tThe current value is %d and %" PRIu64 " is being requested.", | |
1825 | emsg, max_freq, first->attr.sample_freq); | |
1826 | break; | |
1827 | } | |
a8f23d8f | 1828 | default: |
d9aade7f | 1829 | out_default: |
a8f23d8f ACM |
1830 | scnprintf(buf, size, "%s", emsg); |
1831 | break; | |
1832 | } | |
1833 | ||
1834 | return 0; | |
1835 | } | |
a025e4f0 | 1836 | |
956fa571 ACM |
1837 | int perf_evlist__strerror_mmap(struct perf_evlist *evlist, int err, char *buf, size_t size) |
1838 | { | |
1839 | char sbuf[STRERR_BUFSIZE], *emsg = strerror_r(err, sbuf, sizeof(sbuf)); | |
e965bea1 | 1840 | int pages_attempted = evlist->mmap_len / 1024, pages_max_per_user, printed = 0; |
956fa571 ACM |
1841 | |
1842 | switch (err) { | |
1843 | case EPERM: | |
e5d4a290 | 1844 | sysctl__read_int("kernel/perf_event_mlock_kb", &pages_max_per_user); |
e965bea1 ACM |
1845 | printed += scnprintf(buf + printed, size - printed, |
1846 | "Error:\t%s.\n" | |
956fa571 | 1847 | "Hint:\tCheck /proc/sys/kernel/perf_event_mlock_kb (%d kB) setting.\n" |
e965bea1 | 1848 | "Hint:\tTried using %zd kB.\n", |
e5d4a290 | 1849 | emsg, pages_max_per_user, pages_attempted); |
e965bea1 ACM |
1850 | |
1851 | if (pages_attempted >= pages_max_per_user) { | |
1852 | printed += scnprintf(buf + printed, size - printed, | |
1853 | "Hint:\tTry 'sudo sh -c \"echo %d > /proc/sys/kernel/perf_event_mlock_kb\"', or\n", | |
1854 | pages_max_per_user + pages_attempted); | |
1855 | } | |
1856 | ||
1857 | printed += scnprintf(buf + printed, size - printed, | |
1858 | "Hint:\tTry using a smaller -m/--mmap-pages value."); | |
956fa571 ACM |
1859 | break; |
1860 | default: | |
1861 | scnprintf(buf, size, "%s", emsg); | |
1862 | break; | |
1863 | } | |
1864 | ||
1865 | return 0; | |
1866 | } | |
1867 | ||
a025e4f0 AH |
1868 | void perf_evlist__to_front(struct perf_evlist *evlist, |
1869 | struct perf_evsel *move_evsel) | |
1870 | { | |
1871 | struct perf_evsel *evsel, *n; | |
1872 | LIST_HEAD(move); | |
1873 | ||
1874 | if (move_evsel == perf_evlist__first(evlist)) | |
1875 | return; | |
1876 | ||
0050f7aa | 1877 | evlist__for_each_safe(evlist, n, evsel) { |
a025e4f0 AH |
1878 | if (evsel->leader == move_evsel->leader) |
1879 | list_move_tail(&evsel->node, &move); | |
1880 | } | |
1881 | ||
1882 | list_splice(&move, &evlist->entries); | |
1883 | } | |
60b0896c AH |
1884 | |
1885 | void perf_evlist__set_tracking_event(struct perf_evlist *evlist, | |
1886 | struct perf_evsel *tracking_evsel) | |
1887 | { | |
1888 | struct perf_evsel *evsel; | |
1889 | ||
1890 | if (tracking_evsel->tracking) | |
1891 | return; | |
1892 | ||
1893 | evlist__for_each(evlist, evsel) { | |
1894 | if (evsel != tracking_evsel) | |
1895 | evsel->tracking = false; | |
1896 | } | |
1897 | ||
1898 | tracking_evsel->tracking = true; | |
1899 | } | |
7630b3e2 WN |
1900 | |
1901 | struct perf_evsel * | |
1902 | perf_evlist__find_evsel_by_str(struct perf_evlist *evlist, | |
1903 | const char *str) | |
1904 | { | |
1905 | struct perf_evsel *evsel; | |
1906 | ||
1907 | evlist__for_each(evlist, evsel) { | |
1908 | if (!evsel->name) | |
1909 | continue; | |
1910 | if (strcmp(str, evsel->name) == 0) | |
1911 | return evsel; | |
1912 | } | |
1913 | ||
1914 | return NULL; | |
1915 | } |