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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> |
a43783ae | 11 | #include <errno.h> |
fd20e811 | 12 | #include <inttypes.h> |
5c581041 | 13 | #include <poll.h> |
f8a95309 ACM |
14 | #include "cpumap.h" |
15 | #include "thread_map.h" | |
12864b31 | 16 | #include "target.h" |
361c99a6 ACM |
17 | #include "evlist.h" |
18 | #include "evsel.h" | |
e3e1a54f | 19 | #include "debug.h" |
58db1d6e | 20 | #include "units.h" |
54cc54de | 21 | #include "asm/bug.h" |
9607ad3a | 22 | #include <signal.h> |
35b9d88e | 23 | #include <unistd.h> |
361c99a6 | 24 | |
50d08e47 | 25 | #include "parse-events.h" |
4b6ab94e | 26 | #include <subcmd/parse-options.h> |
50d08e47 | 27 | |
86a5e0c2 | 28 | #include <sys/ioctl.h> |
f8a95309 ACM |
29 | #include <sys/mman.h> |
30 | ||
70db7533 ACM |
31 | #include <linux/bitops.h> |
32 | #include <linux/hash.h> | |
0389cd1f | 33 | #include <linux/log2.h> |
8dd2a131 | 34 | #include <linux/err.h> |
70db7533 | 35 | |
8db6d6b1 | 36 | static void perf_mmap__munmap(struct perf_mmap *map); |
4876075b | 37 | static void perf_mmap__put(struct perf_mmap *map); |
e4b356b5 | 38 | |
f8a95309 | 39 | #define FD(e, x, y) (*(int *)xyarray__entry(e->fd, x, y)) |
a91e5431 | 40 | #define SID(e, x, y) xyarray__entry(e->sample_id, x, y) |
f8a95309 | 41 | |
7e2ed097 ACM |
42 | void perf_evlist__init(struct perf_evlist *evlist, struct cpu_map *cpus, |
43 | struct thread_map *threads) | |
ef1d1af2 ACM |
44 | { |
45 | int i; | |
46 | ||
47 | for (i = 0; i < PERF_EVLIST__HLIST_SIZE; ++i) | |
48 | INIT_HLIST_HEAD(&evlist->heads[i]); | |
49 | INIT_LIST_HEAD(&evlist->entries); | |
7e2ed097 | 50 | perf_evlist__set_maps(evlist, cpus, threads); |
1b85337d | 51 | fdarray__init(&evlist->pollfd, 64); |
35b9d88e | 52 | evlist->workload.pid = -1; |
54cc54de | 53 | evlist->bkw_mmap_state = BKW_MMAP_NOTREADY; |
ef1d1af2 ACM |
54 | } |
55 | ||
334fe7a3 | 56 | struct perf_evlist *perf_evlist__new(void) |
361c99a6 ACM |
57 | { |
58 | struct perf_evlist *evlist = zalloc(sizeof(*evlist)); | |
59 | ||
ef1d1af2 | 60 | if (evlist != NULL) |
334fe7a3 | 61 | perf_evlist__init(evlist, NULL, NULL); |
361c99a6 ACM |
62 | |
63 | return evlist; | |
64 | } | |
65 | ||
b22d54b0 JO |
66 | struct perf_evlist *perf_evlist__new_default(void) |
67 | { | |
68 | struct perf_evlist *evlist = perf_evlist__new(); | |
69 | ||
70 | if (evlist && perf_evlist__add_default(evlist)) { | |
71 | perf_evlist__delete(evlist); | |
72 | evlist = NULL; | |
73 | } | |
74 | ||
75 | return evlist; | |
76 | } | |
77 | ||
5bae0250 ACM |
78 | struct perf_evlist *perf_evlist__new_dummy(void) |
79 | { | |
80 | struct perf_evlist *evlist = perf_evlist__new(); | |
81 | ||
82 | if (evlist && perf_evlist__add_dummy(evlist)) { | |
83 | perf_evlist__delete(evlist); | |
84 | evlist = NULL; | |
85 | } | |
86 | ||
87 | return evlist; | |
88 | } | |
89 | ||
75562573 AH |
90 | /** |
91 | * perf_evlist__set_id_pos - set the positions of event ids. | |
92 | * @evlist: selected event list | |
93 | * | |
94 | * Events with compatible sample types all have the same id_pos | |
95 | * and is_pos. For convenience, put a copy on evlist. | |
96 | */ | |
97 | void perf_evlist__set_id_pos(struct perf_evlist *evlist) | |
98 | { | |
99 | struct perf_evsel *first = perf_evlist__first(evlist); | |
100 | ||
101 | evlist->id_pos = first->id_pos; | |
102 | evlist->is_pos = first->is_pos; | |
103 | } | |
104 | ||
733cd2fe AH |
105 | static void perf_evlist__update_id_pos(struct perf_evlist *evlist) |
106 | { | |
107 | struct perf_evsel *evsel; | |
108 | ||
e5cadb93 | 109 | evlist__for_each_entry(evlist, evsel) |
733cd2fe AH |
110 | perf_evsel__calc_id_pos(evsel); |
111 | ||
112 | perf_evlist__set_id_pos(evlist); | |
113 | } | |
114 | ||
361c99a6 ACM |
115 | static void perf_evlist__purge(struct perf_evlist *evlist) |
116 | { | |
117 | struct perf_evsel *pos, *n; | |
118 | ||
e5cadb93 | 119 | evlist__for_each_entry_safe(evlist, n, pos) { |
361c99a6 | 120 | list_del_init(&pos->node); |
d49e4695 | 121 | pos->evlist = NULL; |
361c99a6 ACM |
122 | perf_evsel__delete(pos); |
123 | } | |
124 | ||
125 | evlist->nr_entries = 0; | |
126 | } | |
127 | ||
ef1d1af2 | 128 | void perf_evlist__exit(struct perf_evlist *evlist) |
361c99a6 | 129 | { |
04662523 | 130 | zfree(&evlist->mmap); |
b2cb615d | 131 | zfree(&evlist->backward_mmap); |
1b85337d | 132 | fdarray__exit(&evlist->pollfd); |
ef1d1af2 ACM |
133 | } |
134 | ||
135 | void perf_evlist__delete(struct perf_evlist *evlist) | |
136 | { | |
0b04b3dc ACM |
137 | if (evlist == NULL) |
138 | return; | |
139 | ||
983874d1 | 140 | perf_evlist__munmap(evlist); |
f26e1c7c | 141 | perf_evlist__close(evlist); |
f30a79b0 | 142 | cpu_map__put(evlist->cpus); |
186fbb74 | 143 | thread_map__put(evlist->threads); |
03ad9747 ACM |
144 | evlist->cpus = NULL; |
145 | evlist->threads = NULL; | |
ef1d1af2 ACM |
146 | perf_evlist__purge(evlist); |
147 | perf_evlist__exit(evlist); | |
361c99a6 ACM |
148 | free(evlist); |
149 | } | |
150 | ||
adc0c3e8 AH |
151 | static void __perf_evlist__propagate_maps(struct perf_evlist *evlist, |
152 | struct perf_evsel *evsel) | |
153 | { | |
154 | /* | |
155 | * We already have cpus for evsel (via PMU sysfs) so | |
156 | * keep it, if there's no target cpu list defined. | |
157 | */ | |
158 | if (!evsel->own_cpus || evlist->has_user_cpus) { | |
159 | cpu_map__put(evsel->cpus); | |
160 | evsel->cpus = cpu_map__get(evlist->cpus); | |
161 | } else if (evsel->cpus != evsel->own_cpus) { | |
162 | cpu_map__put(evsel->cpus); | |
163 | evsel->cpus = cpu_map__get(evsel->own_cpus); | |
164 | } | |
165 | ||
166 | thread_map__put(evsel->threads); | |
167 | evsel->threads = thread_map__get(evlist->threads); | |
168 | } | |
169 | ||
170 | static void perf_evlist__propagate_maps(struct perf_evlist *evlist) | |
171 | { | |
172 | struct perf_evsel *evsel; | |
173 | ||
e5cadb93 | 174 | evlist__for_each_entry(evlist, evsel) |
adc0c3e8 AH |
175 | __perf_evlist__propagate_maps(evlist, evsel); |
176 | } | |
177 | ||
361c99a6 ACM |
178 | void perf_evlist__add(struct perf_evlist *evlist, struct perf_evsel *entry) |
179 | { | |
d49e4695 | 180 | entry->evlist = evlist; |
361c99a6 | 181 | list_add_tail(&entry->node, &evlist->entries); |
ef503831 | 182 | entry->idx = evlist->nr_entries; |
60b0896c | 183 | entry->tracking = !entry->idx; |
ef503831 | 184 | |
75562573 AH |
185 | if (!evlist->nr_entries++) |
186 | perf_evlist__set_id_pos(evlist); | |
44c42d71 AH |
187 | |
188 | __perf_evlist__propagate_maps(evlist, entry); | |
361c99a6 ACM |
189 | } |
190 | ||
4768230a AH |
191 | void perf_evlist__remove(struct perf_evlist *evlist, struct perf_evsel *evsel) |
192 | { | |
193 | evsel->evlist = NULL; | |
194 | list_del_init(&evsel->node); | |
195 | evlist->nr_entries -= 1; | |
196 | } | |
197 | ||
0529bc1f | 198 | void perf_evlist__splice_list_tail(struct perf_evlist *evlist, |
f114d6ef | 199 | struct list_head *list) |
50d08e47 | 200 | { |
f114d6ef | 201 | struct perf_evsel *evsel, *temp; |
75562573 | 202 | |
e5cadb93 | 203 | __evlist__for_each_entry_safe(list, temp, evsel) { |
f114d6ef AH |
204 | list_del_init(&evsel->node); |
205 | perf_evlist__add(evlist, evsel); | |
206 | } | |
50d08e47 ACM |
207 | } |
208 | ||
63dab225 ACM |
209 | void __perf_evlist__set_leader(struct list_head *list) |
210 | { | |
211 | struct perf_evsel *evsel, *leader; | |
212 | ||
213 | leader = list_entry(list->next, struct perf_evsel, node); | |
97f63e4a NK |
214 | evsel = list_entry(list->prev, struct perf_evsel, node); |
215 | ||
216 | leader->nr_members = evsel->idx - leader->idx + 1; | |
63dab225 | 217 | |
e5cadb93 | 218 | __evlist__for_each_entry(list, evsel) { |
74b2133d | 219 | evsel->leader = leader; |
63dab225 ACM |
220 | } |
221 | } | |
222 | ||
223 | void perf_evlist__set_leader(struct perf_evlist *evlist) | |
6a4bb04c | 224 | { |
97f63e4a NK |
225 | if (evlist->nr_entries) { |
226 | evlist->nr_groups = evlist->nr_entries > 1 ? 1 : 0; | |
63dab225 | 227 | __perf_evlist__set_leader(&evlist->entries); |
97f63e4a | 228 | } |
6a4bb04c JO |
229 | } |
230 | ||
45cf6c33 | 231 | void perf_event_attr__set_max_precise_ip(struct perf_event_attr *attr) |
7f8d1ade ACM |
232 | { |
233 | attr->precise_ip = 3; | |
234 | ||
235 | while (attr->precise_ip != 0) { | |
236 | int fd = sys_perf_event_open(attr, 0, -1, -1, 0); | |
237 | if (fd != -1) { | |
238 | close(fd); | |
239 | break; | |
240 | } | |
241 | --attr->precise_ip; | |
242 | } | |
243 | } | |
244 | ||
db918acb | 245 | int __perf_evlist__add_default(struct perf_evlist *evlist, bool precise) |
361c99a6 | 246 | { |
db918acb | 247 | struct perf_evsel *evsel = perf_evsel__new_cycles(precise); |
1aed2671 | 248 | |
361c99a6 | 249 | if (evsel == NULL) |
7c48dcfd | 250 | return -ENOMEM; |
361c99a6 ACM |
251 | |
252 | perf_evlist__add(evlist, evsel); | |
253 | return 0; | |
254 | } | |
5c581041 | 255 | |
5bae0250 ACM |
256 | int perf_evlist__add_dummy(struct perf_evlist *evlist) |
257 | { | |
258 | struct perf_event_attr attr = { | |
259 | .type = PERF_TYPE_SOFTWARE, | |
260 | .config = PERF_COUNT_SW_DUMMY, | |
261 | .size = sizeof(attr), /* to capture ABI version */ | |
262 | }; | |
263 | struct perf_evsel *evsel = perf_evsel__new(&attr); | |
264 | ||
265 | if (evsel == NULL) | |
266 | return -ENOMEM; | |
267 | ||
268 | perf_evlist__add(evlist, evsel); | |
269 | return 0; | |
270 | } | |
271 | ||
e60fc847 ACM |
272 | static int perf_evlist__add_attrs(struct perf_evlist *evlist, |
273 | struct perf_event_attr *attrs, size_t nr_attrs) | |
50d08e47 ACM |
274 | { |
275 | struct perf_evsel *evsel, *n; | |
276 | LIST_HEAD(head); | |
277 | size_t i; | |
278 | ||
279 | for (i = 0; i < nr_attrs; i++) { | |
ef503831 | 280 | evsel = perf_evsel__new_idx(attrs + i, evlist->nr_entries + i); |
50d08e47 ACM |
281 | if (evsel == NULL) |
282 | goto out_delete_partial_list; | |
283 | list_add_tail(&evsel->node, &head); | |
284 | } | |
285 | ||
f114d6ef | 286 | perf_evlist__splice_list_tail(evlist, &head); |
50d08e47 ACM |
287 | |
288 | return 0; | |
289 | ||
290 | out_delete_partial_list: | |
e5cadb93 | 291 | __evlist__for_each_entry_safe(&head, n, evsel) |
50d08e47 ACM |
292 | perf_evsel__delete(evsel); |
293 | return -1; | |
294 | } | |
295 | ||
79695e1b ACM |
296 | int __perf_evlist__add_default_attrs(struct perf_evlist *evlist, |
297 | struct perf_event_attr *attrs, size_t nr_attrs) | |
298 | { | |
299 | size_t i; | |
300 | ||
301 | for (i = 0; i < nr_attrs; i++) | |
302 | event_attr_init(attrs + i); | |
303 | ||
304 | return perf_evlist__add_attrs(evlist, attrs, nr_attrs); | |
305 | } | |
306 | ||
da378962 ACM |
307 | struct perf_evsel * |
308 | perf_evlist__find_tracepoint_by_id(struct perf_evlist *evlist, int id) | |
ee29be62 ACM |
309 | { |
310 | struct perf_evsel *evsel; | |
311 | ||
e5cadb93 | 312 | evlist__for_each_entry(evlist, evsel) { |
ee29be62 ACM |
313 | if (evsel->attr.type == PERF_TYPE_TRACEPOINT && |
314 | (int)evsel->attr.config == id) | |
315 | return evsel; | |
316 | } | |
317 | ||
318 | return NULL; | |
319 | } | |
320 | ||
a2f2804a DA |
321 | struct perf_evsel * |
322 | perf_evlist__find_tracepoint_by_name(struct perf_evlist *evlist, | |
323 | const char *name) | |
324 | { | |
325 | struct perf_evsel *evsel; | |
326 | ||
e5cadb93 | 327 | evlist__for_each_entry(evlist, evsel) { |
a2f2804a DA |
328 | if ((evsel->attr.type == PERF_TYPE_TRACEPOINT) && |
329 | (strcmp(evsel->name, name) == 0)) | |
330 | return evsel; | |
331 | } | |
332 | ||
333 | return NULL; | |
334 | } | |
335 | ||
39876e7d ACM |
336 | int perf_evlist__add_newtp(struct perf_evlist *evlist, |
337 | const char *sys, const char *name, void *handler) | |
338 | { | |
ef503831 | 339 | struct perf_evsel *evsel = perf_evsel__newtp(sys, name); |
39876e7d | 340 | |
8dd2a131 | 341 | if (IS_ERR(evsel)) |
39876e7d ACM |
342 | return -1; |
343 | ||
744a9719 | 344 | evsel->handler = handler; |
39876e7d ACM |
345 | perf_evlist__add(evlist, evsel); |
346 | return 0; | |
347 | } | |
348 | ||
bf8e8f4b AH |
349 | static int perf_evlist__nr_threads(struct perf_evlist *evlist, |
350 | struct perf_evsel *evsel) | |
351 | { | |
352 | if (evsel->system_wide) | |
353 | return 1; | |
354 | else | |
355 | return thread_map__nr(evlist->threads); | |
356 | } | |
357 | ||
4152ab37 ACM |
358 | void perf_evlist__disable(struct perf_evlist *evlist) |
359 | { | |
4152ab37 | 360 | struct perf_evsel *pos; |
3e27c920 | 361 | |
e5cadb93 | 362 | evlist__for_each_entry(evlist, pos) { |
3e27c920 JO |
363 | if (!perf_evsel__is_group_leader(pos) || !pos->fd) |
364 | continue; | |
365 | perf_evsel__disable(pos); | |
4152ab37 | 366 | } |
2b56bcfb ACM |
367 | |
368 | evlist->enabled = false; | |
4152ab37 ACM |
369 | } |
370 | ||
764e16a3 DA |
371 | void perf_evlist__enable(struct perf_evlist *evlist) |
372 | { | |
764e16a3 | 373 | struct perf_evsel *pos; |
3e27c920 | 374 | |
e5cadb93 | 375 | evlist__for_each_entry(evlist, pos) { |
3e27c920 JO |
376 | if (!perf_evsel__is_group_leader(pos) || !pos->fd) |
377 | continue; | |
378 | perf_evsel__enable(pos); | |
764e16a3 | 379 | } |
2b56bcfb ACM |
380 | |
381 | evlist->enabled = true; | |
382 | } | |
383 | ||
384 | void perf_evlist__toggle_enable(struct perf_evlist *evlist) | |
385 | { | |
386 | (evlist->enabled ? perf_evlist__disable : perf_evlist__enable)(evlist); | |
764e16a3 DA |
387 | } |
388 | ||
1c65056c AH |
389 | static int perf_evlist__enable_event_cpu(struct perf_evlist *evlist, |
390 | struct perf_evsel *evsel, int cpu) | |
391 | { | |
18ef15c6 | 392 | int thread; |
1c65056c AH |
393 | int nr_threads = perf_evlist__nr_threads(evlist, evsel); |
394 | ||
395 | if (!evsel->fd) | |
396 | return -EINVAL; | |
397 | ||
398 | for (thread = 0; thread < nr_threads; thread++) { | |
18ef15c6 | 399 | int err = ioctl(FD(evsel, cpu, thread), PERF_EVENT_IOC_ENABLE, 0); |
1c65056c AH |
400 | if (err) |
401 | return err; | |
402 | } | |
403 | return 0; | |
404 | } | |
405 | ||
406 | static int perf_evlist__enable_event_thread(struct perf_evlist *evlist, | |
407 | struct perf_evsel *evsel, | |
408 | int thread) | |
409 | { | |
18ef15c6 | 410 | int cpu; |
1c65056c AH |
411 | int nr_cpus = cpu_map__nr(evlist->cpus); |
412 | ||
413 | if (!evsel->fd) | |
414 | return -EINVAL; | |
415 | ||
416 | for (cpu = 0; cpu < nr_cpus; cpu++) { | |
18ef15c6 | 417 | int err = ioctl(FD(evsel, cpu, thread), PERF_EVENT_IOC_ENABLE, 0); |
1c65056c AH |
418 | if (err) |
419 | return err; | |
420 | } | |
421 | return 0; | |
422 | } | |
423 | ||
424 | int perf_evlist__enable_event_idx(struct perf_evlist *evlist, | |
425 | struct perf_evsel *evsel, int idx) | |
426 | { | |
427 | bool per_cpu_mmaps = !cpu_map__empty(evlist->cpus); | |
428 | ||
429 | if (per_cpu_mmaps) | |
430 | return perf_evlist__enable_event_cpu(evlist, evsel, idx); | |
431 | else | |
432 | return perf_evlist__enable_event_thread(evlist, evsel, idx); | |
433 | } | |
434 | ||
ad6765dd | 435 | int perf_evlist__alloc_pollfd(struct perf_evlist *evlist) |
5c581041 | 436 | { |
b3a319d5 NK |
437 | int nr_cpus = cpu_map__nr(evlist->cpus); |
438 | int nr_threads = thread_map__nr(evlist->threads); | |
bf8e8f4b AH |
439 | int nfds = 0; |
440 | struct perf_evsel *evsel; | |
441 | ||
e5cadb93 | 442 | evlist__for_each_entry(evlist, evsel) { |
bf8e8f4b AH |
443 | if (evsel->system_wide) |
444 | nfds += nr_cpus; | |
445 | else | |
446 | nfds += nr_cpus * nr_threads; | |
447 | } | |
448 | ||
1b85337d ACM |
449 | if (fdarray__available_entries(&evlist->pollfd) < nfds && |
450 | fdarray__grow(&evlist->pollfd, nfds) < 0) | |
ad6765dd ACM |
451 | return -ENOMEM; |
452 | ||
453 | return 0; | |
5c581041 | 454 | } |
70082dd9 | 455 | |
4876075b WN |
456 | static int __perf_evlist__add_pollfd(struct perf_evlist *evlist, int fd, |
457 | struct perf_mmap *map, short revent) | |
e4b356b5 | 458 | { |
f3058a1c | 459 | int pos = fdarray__add(&evlist->pollfd, fd, revent | POLLERR | POLLHUP); |
e4b356b5 ACM |
460 | /* |
461 | * Save the idx so that when we filter out fds POLLHUP'ed we can | |
462 | * close the associated evlist->mmap[] entry. | |
463 | */ | |
464 | if (pos >= 0) { | |
4876075b | 465 | evlist->pollfd.priv[pos].ptr = map; |
e4b356b5 ACM |
466 | |
467 | fcntl(fd, F_SETFL, O_NONBLOCK); | |
468 | } | |
469 | ||
470 | return pos; | |
471 | } | |
472 | ||
ad6765dd | 473 | int perf_evlist__add_pollfd(struct perf_evlist *evlist, int fd) |
70082dd9 | 474 | { |
4876075b | 475 | return __perf_evlist__add_pollfd(evlist, fd, NULL, POLLIN); |
e4b356b5 ACM |
476 | } |
477 | ||
258e4bfc WN |
478 | static void perf_evlist__munmap_filtered(struct fdarray *fda, int fd, |
479 | void *arg __maybe_unused) | |
e4b356b5 | 480 | { |
4876075b | 481 | struct perf_mmap *map = fda->priv[fd].ptr; |
1b85337d | 482 | |
4876075b WN |
483 | if (map) |
484 | perf_mmap__put(map); | |
70082dd9 | 485 | } |
70db7533 | 486 | |
1ddec7f0 ACM |
487 | int perf_evlist__filter_pollfd(struct perf_evlist *evlist, short revents_and_mask) |
488 | { | |
e4b356b5 | 489 | return fdarray__filter(&evlist->pollfd, revents_and_mask, |
258e4bfc | 490 | perf_evlist__munmap_filtered, NULL); |
1ddec7f0 ACM |
491 | } |
492 | ||
f66a889d ACM |
493 | int perf_evlist__poll(struct perf_evlist *evlist, int timeout) |
494 | { | |
1b85337d | 495 | return fdarray__poll(&evlist->pollfd, timeout); |
f66a889d ACM |
496 | } |
497 | ||
a91e5431 ACM |
498 | static void perf_evlist__id_hash(struct perf_evlist *evlist, |
499 | struct perf_evsel *evsel, | |
500 | int cpu, int thread, u64 id) | |
3d3b5e95 ACM |
501 | { |
502 | int hash; | |
503 | struct perf_sample_id *sid = SID(evsel, cpu, thread); | |
504 | ||
505 | sid->id = id; | |
506 | sid->evsel = evsel; | |
507 | hash = hash_64(sid->id, PERF_EVLIST__HLIST_BITS); | |
508 | hlist_add_head(&sid->node, &evlist->heads[hash]); | |
509 | } | |
510 | ||
a91e5431 ACM |
511 | void perf_evlist__id_add(struct perf_evlist *evlist, struct perf_evsel *evsel, |
512 | int cpu, int thread, u64 id) | |
513 | { | |
514 | perf_evlist__id_hash(evlist, evsel, cpu, thread, id); | |
515 | evsel->id[evsel->ids++] = id; | |
516 | } | |
517 | ||
1c59612d JO |
518 | int perf_evlist__id_add_fd(struct perf_evlist *evlist, |
519 | struct perf_evsel *evsel, | |
520 | int cpu, int thread, int fd) | |
f8a95309 | 521 | { |
f8a95309 | 522 | u64 read_data[4] = { 0, }; |
3d3b5e95 | 523 | int id_idx = 1; /* The first entry is the counter value */ |
e2b5abe0 JO |
524 | u64 id; |
525 | int ret; | |
526 | ||
527 | ret = ioctl(fd, PERF_EVENT_IOC_ID, &id); | |
528 | if (!ret) | |
529 | goto add; | |
530 | ||
531 | if (errno != ENOTTY) | |
532 | return -1; | |
533 | ||
534 | /* Legacy way to get event id.. All hail to old kernels! */ | |
f8a95309 | 535 | |
c4861afe JO |
536 | /* |
537 | * This way does not work with group format read, so bail | |
538 | * out in that case. | |
539 | */ | |
540 | if (perf_evlist__read_format(evlist) & PERF_FORMAT_GROUP) | |
541 | return -1; | |
542 | ||
f8a95309 ACM |
543 | if (!(evsel->attr.read_format & PERF_FORMAT_ID) || |
544 | read(fd, &read_data, sizeof(read_data)) == -1) | |
545 | return -1; | |
546 | ||
547 | if (evsel->attr.read_format & PERF_FORMAT_TOTAL_TIME_ENABLED) | |
548 | ++id_idx; | |
549 | if (evsel->attr.read_format & PERF_FORMAT_TOTAL_TIME_RUNNING) | |
550 | ++id_idx; | |
551 | ||
e2b5abe0 JO |
552 | id = read_data[id_idx]; |
553 | ||
554 | add: | |
555 | perf_evlist__id_add(evlist, evsel, cpu, thread, id); | |
f8a95309 ACM |
556 | return 0; |
557 | } | |
558 | ||
3c659eed AH |
559 | static void perf_evlist__set_sid_idx(struct perf_evlist *evlist, |
560 | struct perf_evsel *evsel, int idx, int cpu, | |
561 | int thread) | |
562 | { | |
563 | struct perf_sample_id *sid = SID(evsel, cpu, thread); | |
564 | sid->idx = idx; | |
565 | if (evlist->cpus && cpu >= 0) | |
566 | sid->cpu = evlist->cpus->map[cpu]; | |
567 | else | |
568 | sid->cpu = -1; | |
569 | if (!evsel->system_wide && evlist->threads && thread >= 0) | |
e13798c7 | 570 | sid->tid = thread_map__pid(evlist->threads, thread); |
3c659eed AH |
571 | else |
572 | sid->tid = -1; | |
573 | } | |
574 | ||
932a3594 | 575 | struct perf_sample_id *perf_evlist__id2sid(struct perf_evlist *evlist, u64 id) |
70db7533 ACM |
576 | { |
577 | struct hlist_head *head; | |
70db7533 ACM |
578 | struct perf_sample_id *sid; |
579 | int hash; | |
580 | ||
70db7533 ACM |
581 | hash = hash_64(id, PERF_EVLIST__HLIST_BITS); |
582 | head = &evlist->heads[hash]; | |
583 | ||
b67bfe0d | 584 | hlist_for_each_entry(sid, head, node) |
70db7533 | 585 | if (sid->id == id) |
932a3594 JO |
586 | return sid; |
587 | ||
588 | return NULL; | |
589 | } | |
590 | ||
591 | struct perf_evsel *perf_evlist__id2evsel(struct perf_evlist *evlist, u64 id) | |
592 | { | |
593 | struct perf_sample_id *sid; | |
594 | ||
05169df5 | 595 | if (evlist->nr_entries == 1 || !id) |
932a3594 JO |
596 | return perf_evlist__first(evlist); |
597 | ||
598 | sid = perf_evlist__id2sid(evlist, id); | |
599 | if (sid) | |
600 | return sid->evsel; | |
30e68bcc NK |
601 | |
602 | if (!perf_evlist__sample_id_all(evlist)) | |
0c21f736 | 603 | return perf_evlist__first(evlist); |
30e68bcc | 604 | |
70db7533 ACM |
605 | return NULL; |
606 | } | |
04391deb | 607 | |
dddcf6ab AH |
608 | struct perf_evsel *perf_evlist__id2evsel_strict(struct perf_evlist *evlist, |
609 | u64 id) | |
610 | { | |
611 | struct perf_sample_id *sid; | |
612 | ||
613 | if (!id) | |
614 | return NULL; | |
615 | ||
616 | sid = perf_evlist__id2sid(evlist, id); | |
617 | if (sid) | |
618 | return sid->evsel; | |
619 | ||
620 | return NULL; | |
621 | } | |
622 | ||
75562573 AH |
623 | static int perf_evlist__event2id(struct perf_evlist *evlist, |
624 | union perf_event *event, u64 *id) | |
625 | { | |
626 | const u64 *array = event->sample.array; | |
627 | ssize_t n; | |
628 | ||
629 | n = (event->header.size - sizeof(event->header)) >> 3; | |
630 | ||
631 | if (event->header.type == PERF_RECORD_SAMPLE) { | |
632 | if (evlist->id_pos >= n) | |
633 | return -1; | |
634 | *id = array[evlist->id_pos]; | |
635 | } else { | |
636 | if (evlist->is_pos > n) | |
637 | return -1; | |
638 | n -= evlist->is_pos; | |
639 | *id = array[n]; | |
640 | } | |
641 | return 0; | |
642 | } | |
643 | ||
7cb5c5ac JO |
644 | struct perf_evsel *perf_evlist__event2evsel(struct perf_evlist *evlist, |
645 | union perf_event *event) | |
75562573 | 646 | { |
98be6966 | 647 | struct perf_evsel *first = perf_evlist__first(evlist); |
75562573 AH |
648 | struct hlist_head *head; |
649 | struct perf_sample_id *sid; | |
650 | int hash; | |
651 | u64 id; | |
652 | ||
653 | if (evlist->nr_entries == 1) | |
98be6966 AH |
654 | return first; |
655 | ||
656 | if (!first->attr.sample_id_all && | |
657 | event->header.type != PERF_RECORD_SAMPLE) | |
658 | return first; | |
75562573 AH |
659 | |
660 | if (perf_evlist__event2id(evlist, event, &id)) | |
661 | return NULL; | |
662 | ||
663 | /* Synthesized events have an id of zero */ | |
664 | if (!id) | |
98be6966 | 665 | return first; |
75562573 AH |
666 | |
667 | hash = hash_64(id, PERF_EVLIST__HLIST_BITS); | |
668 | head = &evlist->heads[hash]; | |
669 | ||
670 | hlist_for_each_entry(sid, head, node) { | |
671 | if (sid->id == id) | |
672 | return sid->evsel; | |
673 | } | |
674 | return NULL; | |
675 | } | |
676 | ||
65aea233 WN |
677 | static int perf_evlist__set_paused(struct perf_evlist *evlist, bool value) |
678 | { | |
679 | int i; | |
680 | ||
078c3386 WN |
681 | if (!evlist->backward_mmap) |
682 | return 0; | |
683 | ||
65aea233 | 684 | for (i = 0; i < evlist->nr_mmaps; i++) { |
078c3386 | 685 | int fd = evlist->backward_mmap[i].fd; |
65aea233 WN |
686 | int err; |
687 | ||
688 | if (fd < 0) | |
689 | continue; | |
690 | err = ioctl(fd, PERF_EVENT_IOC_PAUSE_OUTPUT, value ? 1 : 0); | |
691 | if (err) | |
692 | return err; | |
693 | } | |
694 | return 0; | |
695 | } | |
696 | ||
f6cdff83 | 697 | static int perf_evlist__pause(struct perf_evlist *evlist) |
65aea233 WN |
698 | { |
699 | return perf_evlist__set_paused(evlist, true); | |
700 | } | |
701 | ||
f6cdff83 | 702 | static int perf_evlist__resume(struct perf_evlist *evlist) |
65aea233 WN |
703 | { |
704 | return perf_evlist__set_paused(evlist, false); | |
705 | } | |
706 | ||
b6b85dad | 707 | /* When check_messup is true, 'end' must points to a good entry */ |
0f4ccd11 | 708 | static union perf_event * |
b6b85dad WN |
709 | perf_mmap__read(struct perf_mmap *md, bool check_messup, u64 start, |
710 | u64 end, u64 *prev) | |
04391deb | 711 | { |
04391deb | 712 | unsigned char *data = md->base + page_size; |
8115d60c | 713 | union perf_event *event = NULL; |
b6b85dad | 714 | int diff = end - start; |
04391deb | 715 | |
b6b85dad | 716 | if (check_messup) { |
04391deb | 717 | /* |
7bb41152 ACM |
718 | * If we're further behind than half the buffer, there's a chance |
719 | * the writer will bite our tail and mess up the samples under us. | |
720 | * | |
b6b85dad | 721 | * If we somehow ended up ahead of the 'end', we got messed up. |
7bb41152 | 722 | * |
b6b85dad | 723 | * In either case, truncate and restart at 'end'. |
04391deb | 724 | */ |
7bb41152 ACM |
725 | if (diff > md->mask / 2 || diff < 0) { |
726 | fprintf(stderr, "WARNING: failed to keep up with mmap data.\n"); | |
727 | ||
728 | /* | |
b6b85dad | 729 | * 'end' points to a known good entry, start there. |
7bb41152 | 730 | */ |
b6b85dad | 731 | start = end; |
b04b7023 | 732 | diff = 0; |
7bb41152 | 733 | } |
04391deb ACM |
734 | } |
735 | ||
b04b7023 | 736 | if (diff >= (int)sizeof(event->header)) { |
04391deb ACM |
737 | size_t size; |
738 | ||
b6b85dad | 739 | event = (union perf_event *)&data[start & md->mask]; |
04391deb ACM |
740 | size = event->header.size; |
741 | ||
b04b7023 WN |
742 | if (size < sizeof(event->header) || diff < (int)size) { |
743 | event = NULL; | |
744 | goto broken_event; | |
745 | } | |
746 | ||
04391deb ACM |
747 | /* |
748 | * Event straddles the mmap boundary -- header should always | |
749 | * be inside due to u64 alignment of output. | |
750 | */ | |
b6b85dad WN |
751 | if ((start & md->mask) + size != ((start + size) & md->mask)) { |
752 | unsigned int offset = start; | |
04391deb | 753 | unsigned int len = min(sizeof(*event), size), cpy; |
a65cb4b9 | 754 | void *dst = md->event_copy; |
04391deb ACM |
755 | |
756 | do { | |
757 | cpy = min(md->mask + 1 - (offset & md->mask), len); | |
758 | memcpy(dst, &data[offset & md->mask], cpy); | |
759 | offset += cpy; | |
760 | dst += cpy; | |
761 | len -= cpy; | |
762 | } while (len); | |
763 | ||
a65cb4b9 | 764 | event = (union perf_event *) md->event_copy; |
04391deb ACM |
765 | } |
766 | ||
b6b85dad | 767 | start += size; |
04391deb ACM |
768 | } |
769 | ||
b04b7023 | 770 | broken_event: |
0f4ccd11 | 771 | if (prev) |
b6b85dad | 772 | *prev = start; |
7bb41152 | 773 | |
04391deb ACM |
774 | return event; |
775 | } | |
f8a95309 | 776 | |
8db6d6b1 | 777 | union perf_event *perf_mmap__read_forward(struct perf_mmap *md, bool check_messup) |
0f4ccd11 | 778 | { |
0f4ccd11 WN |
779 | u64 head; |
780 | u64 old = md->prev; | |
781 | ||
782 | /* | |
783 | * Check if event was unmapped due to a POLLHUP/POLLERR. | |
784 | */ | |
25a3720c | 785 | if (!refcount_read(&md->refcnt)) |
0f4ccd11 WN |
786 | return NULL; |
787 | ||
788 | head = perf_mmap__read_head(md); | |
789 | ||
8db6d6b1 | 790 | return perf_mmap__read(md, check_messup, old, head, &md->prev); |
0f4ccd11 WN |
791 | } |
792 | ||
e24c7520 | 793 | union perf_event * |
8db6d6b1 | 794 | perf_mmap__read_backward(struct perf_mmap *md) |
e24c7520 | 795 | { |
e24c7520 WN |
796 | u64 head, end; |
797 | u64 start = md->prev; | |
798 | ||
799 | /* | |
800 | * Check if event was unmapped due to a POLLHUP/POLLERR. | |
801 | */ | |
25a3720c | 802 | if (!refcount_read(&md->refcnt)) |
e24c7520 WN |
803 | return NULL; |
804 | ||
805 | head = perf_mmap__read_head(md); | |
806 | if (!head) | |
807 | return NULL; | |
808 | ||
809 | /* | |
810 | * 'head' pointer starts from 0. Kernel minus sizeof(record) form | |
811 | * it each time when kernel writes to it, so in fact 'head' is | |
812 | * negative. 'end' pointer is made manually by adding the size of | |
813 | * the ring buffer to 'head' pointer, means the validate data can | |
814 | * read is the whole ring buffer. If 'end' is positive, the ring | |
815 | * buffer has not fully filled, so we must adjust 'end' to 0. | |
816 | * | |
817 | * However, since both 'head' and 'end' is unsigned, we can't | |
818 | * simply compare 'end' against 0. Here we compare '-head' and | |
819 | * the size of the ring buffer, where -head is the number of bytes | |
820 | * kernel write to the ring buffer. | |
821 | */ | |
822 | if (-head < (u64)(md->mask + 1)) | |
823 | end = 0; | |
824 | else | |
825 | end = head + md->mask + 1; | |
826 | ||
827 | return perf_mmap__read(md, false, start, end, &md->prev); | |
828 | } | |
829 | ||
8db6d6b1 WN |
830 | union perf_event *perf_evlist__mmap_read_forward(struct perf_evlist *evlist, int idx) |
831 | { | |
832 | struct perf_mmap *md = &evlist->mmap[idx]; | |
833 | ||
834 | /* | |
835 | * Check messup is required for forward overwritable ring buffer: | |
836 | * memory pointed by md->prev can be overwritten in this case. | |
837 | * No need for read-write ring buffer: kernel stop outputting when | |
838 | * it hit md->prev (perf_mmap__consume()). | |
839 | */ | |
840 | return perf_mmap__read_forward(md, evlist->overwrite); | |
841 | } | |
842 | ||
843 | union perf_event *perf_evlist__mmap_read_backward(struct perf_evlist *evlist, int idx) | |
844 | { | |
845 | struct perf_mmap *md = &evlist->mmap[idx]; | |
846 | ||
847 | /* | |
848 | * No need to check messup for backward ring buffer: | |
849 | * We can always read arbitrary long data from a backward | |
850 | * ring buffer unless we forget to pause it before reading. | |
851 | */ | |
852 | return perf_mmap__read_backward(md); | |
853 | } | |
854 | ||
5a5ddeb6 WN |
855 | union perf_event *perf_evlist__mmap_read(struct perf_evlist *evlist, int idx) |
856 | { | |
a0c6f451 | 857 | return perf_evlist__mmap_read_forward(evlist, idx); |
5a5ddeb6 WN |
858 | } |
859 | ||
8db6d6b1 | 860 | void perf_mmap__read_catchup(struct perf_mmap *md) |
e24c7520 | 861 | { |
e24c7520 WN |
862 | u64 head; |
863 | ||
25a3720c | 864 | if (!refcount_read(&md->refcnt)) |
e24c7520 WN |
865 | return; |
866 | ||
867 | head = perf_mmap__read_head(md); | |
868 | md->prev = head; | |
869 | } | |
870 | ||
8db6d6b1 WN |
871 | void perf_evlist__mmap_read_catchup(struct perf_evlist *evlist, int idx) |
872 | { | |
873 | perf_mmap__read_catchup(&evlist->mmap[idx]); | |
874 | } | |
875 | ||
82396986 ACM |
876 | static bool perf_mmap__empty(struct perf_mmap *md) |
877 | { | |
b72e74d1 | 878 | return perf_mmap__read_head(md) == md->prev && !md->auxtrace_mmap.base; |
82396986 ACM |
879 | } |
880 | ||
8db6d6b1 | 881 | static void perf_mmap__get(struct perf_mmap *map) |
82396986 | 882 | { |
25a3720c | 883 | refcount_inc(&map->refcnt); |
82396986 ACM |
884 | } |
885 | ||
8db6d6b1 | 886 | static void perf_mmap__put(struct perf_mmap *md) |
82396986 | 887 | { |
25a3720c | 888 | BUG_ON(md->base && refcount_read(&md->refcnt) == 0); |
82396986 | 889 | |
25a3720c | 890 | if (refcount_dec_and_test(&md->refcnt)) |
8db6d6b1 | 891 | perf_mmap__munmap(md); |
82396986 ACM |
892 | } |
893 | ||
8db6d6b1 WN |
894 | void perf_mmap__consume(struct perf_mmap *md, bool overwrite) |
895 | { | |
896 | if (!overwrite) { | |
7b8283b5 | 897 | u64 old = md->prev; |
8e50d384 ZZ |
898 | |
899 | perf_mmap__write_tail(md, old); | |
900 | } | |
82396986 | 901 | |
25a3720c | 902 | if (refcount_read(&md->refcnt) == 1 && perf_mmap__empty(md)) |
8db6d6b1 WN |
903 | perf_mmap__put(md); |
904 | } | |
905 | ||
906 | void perf_evlist__mmap_consume(struct perf_evlist *evlist, int idx) | |
907 | { | |
908 | perf_mmap__consume(&evlist->mmap[idx], evlist->overwrite); | |
8e50d384 ZZ |
909 | } |
910 | ||
718c602d AH |
911 | int __weak auxtrace_mmap__mmap(struct auxtrace_mmap *mm __maybe_unused, |
912 | struct auxtrace_mmap_params *mp __maybe_unused, | |
913 | void *userpg __maybe_unused, | |
914 | int fd __maybe_unused) | |
915 | { | |
916 | return 0; | |
917 | } | |
918 | ||
919 | void __weak auxtrace_mmap__munmap(struct auxtrace_mmap *mm __maybe_unused) | |
920 | { | |
921 | } | |
922 | ||
923 | void __weak auxtrace_mmap_params__init( | |
924 | struct auxtrace_mmap_params *mp __maybe_unused, | |
925 | off_t auxtrace_offset __maybe_unused, | |
926 | unsigned int auxtrace_pages __maybe_unused, | |
927 | bool auxtrace_overwrite __maybe_unused) | |
928 | { | |
929 | } | |
930 | ||
931 | void __weak auxtrace_mmap_params__set_idx( | |
932 | struct auxtrace_mmap_params *mp __maybe_unused, | |
933 | struct perf_evlist *evlist __maybe_unused, | |
934 | int idx __maybe_unused, | |
935 | bool per_cpu __maybe_unused) | |
936 | { | |
937 | } | |
938 | ||
8db6d6b1 | 939 | static void perf_mmap__munmap(struct perf_mmap *map) |
93edcbd9 | 940 | { |
8db6d6b1 WN |
941 | if (map->base != NULL) { |
942 | munmap(map->base, perf_mmap__mmap_len(map)); | |
943 | map->base = NULL; | |
944 | map->fd = -1; | |
25a3720c | 945 | refcount_set(&map->refcnt, 0); |
93edcbd9 | 946 | } |
8db6d6b1 WN |
947 | auxtrace_mmap__munmap(&map->auxtrace_mmap); |
948 | } | |
949 | ||
a1f72618 | 950 | static void perf_evlist__munmap_nofree(struct perf_evlist *evlist) |
f8a95309 | 951 | { |
aece948f | 952 | int i; |
f8a95309 | 953 | |
b2cb615d WN |
954 | if (evlist->mmap) |
955 | for (i = 0; i < evlist->nr_mmaps; i++) | |
956 | perf_mmap__munmap(&evlist->mmap[i]); | |
983874d1 | 957 | |
b2cb615d WN |
958 | if (evlist->backward_mmap) |
959 | for (i = 0; i < evlist->nr_mmaps; i++) | |
960 | perf_mmap__munmap(&evlist->backward_mmap[i]); | |
a1f72618 | 961 | } |
aece948f | 962 | |
a1f72618 WN |
963 | void perf_evlist__munmap(struct perf_evlist *evlist) |
964 | { | |
965 | perf_evlist__munmap_nofree(evlist); | |
04662523 | 966 | zfree(&evlist->mmap); |
b2cb615d | 967 | zfree(&evlist->backward_mmap); |
f8a95309 ACM |
968 | } |
969 | ||
8db6d6b1 | 970 | static struct perf_mmap *perf_evlist__alloc_mmap(struct perf_evlist *evlist) |
f8a95309 | 971 | { |
d4c6fb36 | 972 | int i; |
8db6d6b1 | 973 | struct perf_mmap *map; |
d4c6fb36 | 974 | |
a14bb7a6 | 975 | evlist->nr_mmaps = cpu_map__nr(evlist->cpus); |
ec1e7e43 | 976 | if (cpu_map__empty(evlist->cpus)) |
b3a319d5 | 977 | evlist->nr_mmaps = thread_map__nr(evlist->threads); |
8db6d6b1 WN |
978 | map = zalloc(evlist->nr_mmaps * sizeof(struct perf_mmap)); |
979 | if (!map) | |
980 | return NULL; | |
946ae1d4 | 981 | |
4738ca30 | 982 | for (i = 0; i < evlist->nr_mmaps; i++) { |
8db6d6b1 | 983 | map[i].fd = -1; |
4738ca30 ACM |
984 | /* |
985 | * When the perf_mmap() call is made we grab one refcount, plus | |
986 | * one extra to let perf_evlist__mmap_consume() get the last | |
987 | * events after all real references (perf_mmap__get()) are | |
988 | * dropped. | |
989 | * | |
990 | * Each PERF_EVENT_IOC_SET_OUTPUT points to this mmap and | |
991 | * thus does perf_mmap__get() on it. | |
992 | */ | |
993 | refcount_set(&map[i].refcnt, 0); | |
994 | } | |
8db6d6b1 | 995 | return map; |
f8a95309 ACM |
996 | } |
997 | ||
a8a8f3eb AH |
998 | struct mmap_params { |
999 | int prot; | |
1000 | int mask; | |
718c602d | 1001 | struct auxtrace_mmap_params auxtrace_mp; |
a8a8f3eb AH |
1002 | }; |
1003 | ||
8db6d6b1 WN |
1004 | static int perf_mmap__mmap(struct perf_mmap *map, |
1005 | struct mmap_params *mp, int fd) | |
f8a95309 | 1006 | { |
82396986 ACM |
1007 | /* |
1008 | * The last one will be done at perf_evlist__mmap_consume(), so that we | |
1009 | * make sure we don't prevent tools from consuming every last event in | |
1010 | * the ring buffer. | |
1011 | * | |
1012 | * I.e. we can get the POLLHUP meaning that the fd doesn't exist | |
1013 | * anymore, but the last events for it are still in the ring buffer, | |
1014 | * waiting to be consumed. | |
1015 | * | |
1016 | * Tools can chose to ignore this at their own discretion, but the | |
1017 | * evlist layer can't just drop it when filtering events in | |
1018 | * perf_evlist__filter_pollfd(). | |
1019 | */ | |
25a3720c | 1020 | refcount_set(&map->refcnt, 2); |
8db6d6b1 WN |
1021 | map->prev = 0; |
1022 | map->mask = mp->mask; | |
1023 | map->base = mmap(NULL, perf_mmap__mmap_len(map), mp->prot, | |
1024 | MAP_SHARED, fd, 0); | |
1025 | if (map->base == MAP_FAILED) { | |
02635965 AH |
1026 | pr_debug2("failed to mmap perf event ring buffer, error %d\n", |
1027 | errno); | |
8db6d6b1 | 1028 | map->base = NULL; |
f8a95309 | 1029 | return -1; |
301b195d | 1030 | } |
8db6d6b1 | 1031 | map->fd = fd; |
ad6765dd | 1032 | |
8db6d6b1 WN |
1033 | if (auxtrace_mmap__mmap(&map->auxtrace_mmap, |
1034 | &mp->auxtrace_mp, map->base, fd)) | |
718c602d AH |
1035 | return -1; |
1036 | ||
f8a95309 ACM |
1037 | return 0; |
1038 | } | |
1039 | ||
f3058a1c WN |
1040 | static bool |
1041 | perf_evlist__should_poll(struct perf_evlist *evlist __maybe_unused, | |
1042 | struct perf_evsel *evsel) | |
1043 | { | |
32a951b4 | 1044 | if (evsel->attr.write_backward) |
f3058a1c WN |
1045 | return false; |
1046 | return true; | |
1047 | } | |
1048 | ||
04e21314 | 1049 | static int perf_evlist__mmap_per_evsel(struct perf_evlist *evlist, int idx, |
9f21b815 | 1050 | struct mmap_params *mp, int cpu_idx, |
078c3386 | 1051 | int thread, int *_output, int *_output_backward) |
aece948f ACM |
1052 | { |
1053 | struct perf_evsel *evsel; | |
f3058a1c | 1054 | int revent; |
9f21b815 | 1055 | int evlist_cpu = cpu_map__cpu(evlist->cpus, cpu_idx); |
04e21314 | 1056 | |
e5cadb93 | 1057 | evlist__for_each_entry(evlist, evsel) { |
078c3386 WN |
1058 | struct perf_mmap *maps = evlist->mmap; |
1059 | int *output = _output; | |
bf8e8f4b | 1060 | int fd; |
9f21b815 | 1061 | int cpu; |
bf8e8f4b | 1062 | |
078c3386 WN |
1063 | if (evsel->attr.write_backward) { |
1064 | output = _output_backward; | |
1065 | maps = evlist->backward_mmap; | |
1066 | ||
1067 | if (!maps) { | |
1068 | maps = perf_evlist__alloc_mmap(evlist); | |
1069 | if (!maps) | |
1070 | return -1; | |
1071 | evlist->backward_mmap = maps; | |
54cc54de WN |
1072 | if (evlist->bkw_mmap_state == BKW_MMAP_NOTREADY) |
1073 | perf_evlist__toggle_bkw_mmap(evlist, BKW_MMAP_RUNNING); | |
078c3386 WN |
1074 | } |
1075 | } | |
f3058a1c | 1076 | |
bf8e8f4b AH |
1077 | if (evsel->system_wide && thread) |
1078 | continue; | |
1079 | ||
9f21b815 MR |
1080 | cpu = cpu_map__idx(evsel->cpus, evlist_cpu); |
1081 | if (cpu == -1) | |
1082 | continue; | |
1083 | ||
bf8e8f4b | 1084 | fd = FD(evsel, cpu, thread); |
04e21314 AH |
1085 | |
1086 | if (*output == -1) { | |
1087 | *output = fd; | |
078c3386 WN |
1088 | |
1089 | if (perf_mmap__mmap(&maps[idx], mp, *output) < 0) | |
04e21314 AH |
1090 | return -1; |
1091 | } else { | |
1092 | if (ioctl(fd, PERF_EVENT_IOC_SET_OUTPUT, *output) != 0) | |
1093 | return -1; | |
82396986 | 1094 | |
078c3386 | 1095 | perf_mmap__get(&maps[idx]); |
04e21314 AH |
1096 | } |
1097 | ||
f3058a1c WN |
1098 | revent = perf_evlist__should_poll(evlist, evsel) ? POLLIN : 0; |
1099 | ||
f90d194a AH |
1100 | /* |
1101 | * The system_wide flag causes a selected event to be opened | |
1102 | * always without a pid. Consequently it will never get a | |
1103 | * POLLHUP, but it is used for tracking in combination with | |
1104 | * other events, so it should not need to be polled anyway. | |
1105 | * Therefore don't add it for polling. | |
1106 | */ | |
1107 | if (!evsel->system_wide && | |
078c3386 WN |
1108 | __perf_evlist__add_pollfd(evlist, fd, &maps[idx], revent) < 0) { |
1109 | perf_mmap__put(&maps[idx]); | |
ad6765dd | 1110 | return -1; |
82396986 | 1111 | } |
033fa713 | 1112 | |
3c659eed AH |
1113 | if (evsel->attr.read_format & PERF_FORMAT_ID) { |
1114 | if (perf_evlist__id_add_fd(evlist, evsel, cpu, thread, | |
1115 | fd) < 0) | |
1116 | return -1; | |
1117 | perf_evlist__set_sid_idx(evlist, evsel, idx, cpu, | |
1118 | thread); | |
1119 | } | |
04e21314 AH |
1120 | } |
1121 | ||
1122 | return 0; | |
1123 | } | |
1124 | ||
a8a8f3eb AH |
1125 | static int perf_evlist__mmap_per_cpu(struct perf_evlist *evlist, |
1126 | struct mmap_params *mp) | |
04e21314 | 1127 | { |
aece948f | 1128 | int cpu, thread; |
b3a319d5 NK |
1129 | int nr_cpus = cpu_map__nr(evlist->cpus); |
1130 | int nr_threads = thread_map__nr(evlist->threads); | |
aece948f | 1131 | |
e3e1a54f | 1132 | pr_debug2("perf event ring buffer mmapped per cpu\n"); |
b3a319d5 | 1133 | for (cpu = 0; cpu < nr_cpus; cpu++) { |
aece948f | 1134 | int output = -1; |
078c3386 | 1135 | int output_backward = -1; |
aece948f | 1136 | |
718c602d AH |
1137 | auxtrace_mmap_params__set_idx(&mp->auxtrace_mp, evlist, cpu, |
1138 | true); | |
1139 | ||
b3a319d5 | 1140 | for (thread = 0; thread < nr_threads; thread++) { |
a8a8f3eb | 1141 | if (perf_evlist__mmap_per_evsel(evlist, cpu, mp, cpu, |
078c3386 | 1142 | thread, &output, &output_backward)) |
04e21314 | 1143 | goto out_unmap; |
aece948f ACM |
1144 | } |
1145 | } | |
1146 | ||
1147 | return 0; | |
1148 | ||
1149 | out_unmap: | |
a1f72618 | 1150 | perf_evlist__munmap_nofree(evlist); |
aece948f ACM |
1151 | return -1; |
1152 | } | |
1153 | ||
a8a8f3eb AH |
1154 | static int perf_evlist__mmap_per_thread(struct perf_evlist *evlist, |
1155 | struct mmap_params *mp) | |
aece948f | 1156 | { |
aece948f | 1157 | int thread; |
b3a319d5 | 1158 | int nr_threads = thread_map__nr(evlist->threads); |
aece948f | 1159 | |
e3e1a54f | 1160 | pr_debug2("perf event ring buffer mmapped per thread\n"); |
b3a319d5 | 1161 | for (thread = 0; thread < nr_threads; thread++) { |
aece948f | 1162 | int output = -1; |
078c3386 | 1163 | int output_backward = -1; |
aece948f | 1164 | |
718c602d AH |
1165 | auxtrace_mmap_params__set_idx(&mp->auxtrace_mp, evlist, thread, |
1166 | false); | |
1167 | ||
a8a8f3eb | 1168 | if (perf_evlist__mmap_per_evsel(evlist, thread, mp, 0, thread, |
078c3386 | 1169 | &output, &output_backward)) |
04e21314 | 1170 | goto out_unmap; |
aece948f ACM |
1171 | } |
1172 | ||
1173 | return 0; | |
1174 | ||
1175 | out_unmap: | |
a1f72618 | 1176 | perf_evlist__munmap_nofree(evlist); |
aece948f ACM |
1177 | return -1; |
1178 | } | |
1179 | ||
f5e7150c | 1180 | unsigned long perf_event_mlock_kb_in_pages(void) |
994a1f78 | 1181 | { |
f5e7150c ACM |
1182 | unsigned long pages; |
1183 | int max; | |
8185e881 | 1184 | |
f5e7150c ACM |
1185 | if (sysctl__read_int("kernel/perf_event_mlock_kb", &max) < 0) { |
1186 | /* | |
1187 | * Pick a once upon a time good value, i.e. things look | |
1188 | * strange since we can't read a sysctl value, but lets not | |
1189 | * die yet... | |
1190 | */ | |
1191 | max = 512; | |
1192 | } else { | |
1193 | max -= (page_size / 1024); | |
1194 | } | |
8185e881 | 1195 | |
f5e7150c ACM |
1196 | pages = (max * 1024) / page_size; |
1197 | if (!is_power_of_2(pages)) | |
1198 | pages = rounddown_pow_of_two(pages); | |
1199 | ||
1200 | return pages; | |
1201 | } | |
1202 | ||
0c582449 | 1203 | size_t perf_evlist__mmap_size(unsigned long pages) |
f5e7150c ACM |
1204 | { |
1205 | if (pages == UINT_MAX) | |
1206 | pages = perf_event_mlock_kb_in_pages(); | |
1207 | else if (!is_power_of_2(pages)) | |
994a1f78 JO |
1208 | return 0; |
1209 | ||
1210 | return (pages + 1) * page_size; | |
1211 | } | |
1212 | ||
33c2dcfd DA |
1213 | static long parse_pages_arg(const char *str, unsigned long min, |
1214 | unsigned long max) | |
994a1f78 | 1215 | { |
2fbe4abe | 1216 | unsigned long pages, val; |
27050f53 JO |
1217 | static struct parse_tag tags[] = { |
1218 | { .tag = 'B', .mult = 1 }, | |
1219 | { .tag = 'K', .mult = 1 << 10 }, | |
1220 | { .tag = 'M', .mult = 1 << 20 }, | |
1221 | { .tag = 'G', .mult = 1 << 30 }, | |
1222 | { .tag = 0 }, | |
1223 | }; | |
994a1f78 | 1224 | |
8973504b | 1225 | if (str == NULL) |
33c2dcfd | 1226 | return -EINVAL; |
8973504b | 1227 | |
27050f53 | 1228 | val = parse_tag_value(str, tags); |
2fbe4abe | 1229 | if (val != (unsigned long) -1) { |
27050f53 JO |
1230 | /* we got file size value */ |
1231 | pages = PERF_ALIGN(val, page_size) / page_size; | |
27050f53 JO |
1232 | } else { |
1233 | /* we got pages count value */ | |
1234 | char *eptr; | |
1235 | pages = strtoul(str, &eptr, 10); | |
33c2dcfd DA |
1236 | if (*eptr != '\0') |
1237 | return -EINVAL; | |
994a1f78 JO |
1238 | } |
1239 | ||
2bcab6c1 | 1240 | if (pages == 0 && min == 0) { |
33c2dcfd | 1241 | /* leave number of pages at 0 */ |
1dbfa938 | 1242 | } else if (!is_power_of_2(pages)) { |
9808143b JO |
1243 | char buf[100]; |
1244 | ||
33c2dcfd | 1245 | /* round pages up to next power of 2 */ |
91529834 | 1246 | pages = roundup_pow_of_two(pages); |
1dbfa938 AH |
1247 | if (!pages) |
1248 | return -EINVAL; | |
9808143b JO |
1249 | |
1250 | unit_number__scnprintf(buf, sizeof(buf), pages * page_size); | |
1251 | pr_info("rounding mmap pages size to %s (%lu pages)\n", | |
1252 | buf, pages); | |
2fbe4abe AH |
1253 | } |
1254 | ||
33c2dcfd DA |
1255 | if (pages > max) |
1256 | return -EINVAL; | |
1257 | ||
1258 | return pages; | |
1259 | } | |
1260 | ||
e9db1310 | 1261 | int __perf_evlist__parse_mmap_pages(unsigned int *mmap_pages, const char *str) |
33c2dcfd | 1262 | { |
33c2dcfd DA |
1263 | unsigned long max = UINT_MAX; |
1264 | long pages; | |
1265 | ||
f5ae9c42 | 1266 | if (max > SIZE_MAX / page_size) |
33c2dcfd DA |
1267 | max = SIZE_MAX / page_size; |
1268 | ||
1269 | pages = parse_pages_arg(str, 1, max); | |
1270 | if (pages < 0) { | |
1271 | pr_err("Invalid argument for --mmap_pages/-m\n"); | |
994a1f78 JO |
1272 | return -1; |
1273 | } | |
1274 | ||
1275 | *mmap_pages = pages; | |
1276 | return 0; | |
1277 | } | |
1278 | ||
e9db1310 AH |
1279 | int perf_evlist__parse_mmap_pages(const struct option *opt, const char *str, |
1280 | int unset __maybe_unused) | |
1281 | { | |
1282 | return __perf_evlist__parse_mmap_pages(opt->value, str); | |
1283 | } | |
1284 | ||
c83fa7f2 | 1285 | /** |
718c602d | 1286 | * perf_evlist__mmap_ex - Create mmaps to receive events. |
c83fa7f2 AH |
1287 | * @evlist: list of events |
1288 | * @pages: map length in pages | |
1289 | * @overwrite: overwrite older events? | |
718c602d AH |
1290 | * @auxtrace_pages - auxtrace map length in pages |
1291 | * @auxtrace_overwrite - overwrite older auxtrace data? | |
f8a95309 | 1292 | * |
c83fa7f2 AH |
1293 | * If @overwrite is %false the user needs to signal event consumption using |
1294 | * perf_mmap__write_tail(). Using perf_evlist__mmap_read() does this | |
1295 | * automatically. | |
7e2ed097 | 1296 | * |
718c602d AH |
1297 | * Similarly, if @auxtrace_overwrite is %false the user needs to signal data |
1298 | * consumption using auxtrace_mmap__write_tail(). | |
1299 | * | |
c83fa7f2 | 1300 | * Return: %0 on success, negative error code otherwise. |
f8a95309 | 1301 | */ |
718c602d AH |
1302 | int perf_evlist__mmap_ex(struct perf_evlist *evlist, unsigned int pages, |
1303 | bool overwrite, unsigned int auxtrace_pages, | |
1304 | bool auxtrace_overwrite) | |
f8a95309 | 1305 | { |
aece948f | 1306 | struct perf_evsel *evsel; |
7e2ed097 ACM |
1307 | const struct cpu_map *cpus = evlist->cpus; |
1308 | const struct thread_map *threads = evlist->threads; | |
a8a8f3eb AH |
1309 | struct mmap_params mp = { |
1310 | .prot = PROT_READ | (overwrite ? 0 : PROT_WRITE), | |
1311 | }; | |
50a682ce | 1312 | |
8db6d6b1 WN |
1313 | if (!evlist->mmap) |
1314 | evlist->mmap = perf_evlist__alloc_mmap(evlist); | |
1315 | if (!evlist->mmap) | |
f8a95309 ACM |
1316 | return -ENOMEM; |
1317 | ||
1b85337d | 1318 | if (evlist->pollfd.entries == NULL && perf_evlist__alloc_pollfd(evlist) < 0) |
f8a95309 ACM |
1319 | return -ENOMEM; |
1320 | ||
1321 | evlist->overwrite = overwrite; | |
994a1f78 | 1322 | evlist->mmap_len = perf_evlist__mmap_size(pages); |
2af68ef5 | 1323 | pr_debug("mmap size %zuB\n", evlist->mmap_len); |
a8a8f3eb | 1324 | mp.mask = evlist->mmap_len - page_size - 1; |
f8a95309 | 1325 | |
718c602d AH |
1326 | auxtrace_mmap_params__init(&mp.auxtrace_mp, evlist->mmap_len, |
1327 | auxtrace_pages, auxtrace_overwrite); | |
1328 | ||
e5cadb93 | 1329 | evlist__for_each_entry(evlist, evsel) { |
f8a95309 | 1330 | if ((evsel->attr.read_format & PERF_FORMAT_ID) && |
a91e5431 | 1331 | evsel->sample_id == NULL && |
a14bb7a6 | 1332 | perf_evsel__alloc_id(evsel, cpu_map__nr(cpus), threads->nr) < 0) |
f8a95309 | 1333 | return -ENOMEM; |
f8a95309 ACM |
1334 | } |
1335 | ||
ec1e7e43 | 1336 | if (cpu_map__empty(cpus)) |
a8a8f3eb | 1337 | return perf_evlist__mmap_per_thread(evlist, &mp); |
f8a95309 | 1338 | |
a8a8f3eb | 1339 | return perf_evlist__mmap_per_cpu(evlist, &mp); |
f8a95309 | 1340 | } |
7e2ed097 | 1341 | |
718c602d AH |
1342 | int perf_evlist__mmap(struct perf_evlist *evlist, unsigned int pages, |
1343 | bool overwrite) | |
1344 | { | |
1345 | return perf_evlist__mmap_ex(evlist, pages, overwrite, 0, false); | |
1346 | } | |
1347 | ||
602ad878 | 1348 | int perf_evlist__create_maps(struct perf_evlist *evlist, struct target *target) |
7e2ed097 | 1349 | { |
74bfd2b2 AH |
1350 | struct cpu_map *cpus; |
1351 | struct thread_map *threads; | |
7e2ed097 | 1352 | |
74bfd2b2 | 1353 | threads = thread_map__new_str(target->pid, target->tid, target->uid); |
7e2ed097 | 1354 | |
74bfd2b2 | 1355 | if (!threads) |
7e2ed097 ACM |
1356 | return -1; |
1357 | ||
9c105fbc | 1358 | if (target__uses_dummy_map(target)) |
74bfd2b2 | 1359 | cpus = cpu_map__dummy_new(); |
879d77d0 | 1360 | else |
74bfd2b2 | 1361 | cpus = cpu_map__new(target->cpu_list); |
7e2ed097 | 1362 | |
74bfd2b2 | 1363 | if (!cpus) |
7e2ed097 ACM |
1364 | goto out_delete_threads; |
1365 | ||
ec9a77a7 AH |
1366 | evlist->has_user_cpus = !!target->cpu_list; |
1367 | ||
74bfd2b2 | 1368 | perf_evlist__set_maps(evlist, cpus, threads); |
d5bc056e AH |
1369 | |
1370 | return 0; | |
7e2ed097 ACM |
1371 | |
1372 | out_delete_threads: | |
74bfd2b2 | 1373 | thread_map__put(threads); |
7e2ed097 ACM |
1374 | return -1; |
1375 | } | |
1376 | ||
d5bc056e AH |
1377 | void perf_evlist__set_maps(struct perf_evlist *evlist, struct cpu_map *cpus, |
1378 | struct thread_map *threads) | |
3de5cfb0 | 1379 | { |
934e0f20 AH |
1380 | /* |
1381 | * Allow for the possibility that one or another of the maps isn't being | |
1382 | * changed i.e. don't put it. Note we are assuming the maps that are | |
1383 | * being applied are brand new and evlist is taking ownership of the | |
1384 | * original reference count of 1. If that is not the case it is up to | |
1385 | * the caller to increase the reference count. | |
1386 | */ | |
1387 | if (cpus != evlist->cpus) { | |
3de5cfb0 | 1388 | cpu_map__put(evlist->cpus); |
a55e5663 | 1389 | evlist->cpus = cpu_map__get(cpus); |
934e0f20 | 1390 | } |
3de5cfb0 | 1391 | |
934e0f20 | 1392 | if (threads != evlist->threads) { |
3de5cfb0 | 1393 | thread_map__put(evlist->threads); |
a55e5663 | 1394 | evlist->threads = thread_map__get(threads); |
934e0f20 | 1395 | } |
3de5cfb0 | 1396 | |
ec9a77a7 | 1397 | perf_evlist__propagate_maps(evlist); |
3de5cfb0 JO |
1398 | } |
1399 | ||
22c8a376 ACM |
1400 | void __perf_evlist__set_sample_bit(struct perf_evlist *evlist, |
1401 | enum perf_event_sample_format bit) | |
1402 | { | |
1403 | struct perf_evsel *evsel; | |
1404 | ||
e5cadb93 | 1405 | evlist__for_each_entry(evlist, evsel) |
22c8a376 ACM |
1406 | __perf_evsel__set_sample_bit(evsel, bit); |
1407 | } | |
1408 | ||
1409 | void __perf_evlist__reset_sample_bit(struct perf_evlist *evlist, | |
1410 | enum perf_event_sample_format bit) | |
1411 | { | |
1412 | struct perf_evsel *evsel; | |
1413 | ||
e5cadb93 | 1414 | evlist__for_each_entry(evlist, evsel) |
22c8a376 ACM |
1415 | __perf_evsel__reset_sample_bit(evsel, bit); |
1416 | } | |
1417 | ||
23d4aad4 | 1418 | int perf_evlist__apply_filters(struct perf_evlist *evlist, struct perf_evsel **err_evsel) |
0a102479 | 1419 | { |
0a102479 | 1420 | struct perf_evsel *evsel; |
745cefc5 ACM |
1421 | int err = 0; |
1422 | const int ncpus = cpu_map__nr(evlist->cpus), | |
b3a319d5 | 1423 | nthreads = thread_map__nr(evlist->threads); |
0a102479 | 1424 | |
e5cadb93 | 1425 | evlist__for_each_entry(evlist, evsel) { |
745cefc5 | 1426 | if (evsel->filter == NULL) |
0a102479 | 1427 | continue; |
745cefc5 | 1428 | |
d988d5ee KL |
1429 | /* |
1430 | * filters only work for tracepoint event, which doesn't have cpu limit. | |
1431 | * So evlist and evsel should always be same. | |
1432 | */ | |
f47805a2 | 1433 | err = perf_evsel__apply_filter(evsel, ncpus, nthreads, evsel->filter); |
23d4aad4 ACM |
1434 | if (err) { |
1435 | *err_evsel = evsel; | |
745cefc5 | 1436 | break; |
23d4aad4 | 1437 | } |
0a102479 FW |
1438 | } |
1439 | ||
745cefc5 ACM |
1440 | return err; |
1441 | } | |
1442 | ||
1443 | int perf_evlist__set_filter(struct perf_evlist *evlist, const char *filter) | |
1444 | { | |
1445 | struct perf_evsel *evsel; | |
1446 | int err = 0; | |
745cefc5 | 1447 | |
e5cadb93 | 1448 | evlist__for_each_entry(evlist, evsel) { |
fdf14720 WN |
1449 | if (evsel->attr.type != PERF_TYPE_TRACEPOINT) |
1450 | continue; | |
1451 | ||
94ad89bc | 1452 | err = perf_evsel__set_filter(evsel, filter); |
745cefc5 ACM |
1453 | if (err) |
1454 | break; | |
1455 | } | |
1456 | ||
1457 | return err; | |
0a102479 | 1458 | } |
74429964 | 1459 | |
be199ada | 1460 | int perf_evlist__set_filter_pids(struct perf_evlist *evlist, size_t npids, pid_t *pids) |
cfd70a26 ACM |
1461 | { |
1462 | char *filter; | |
be199ada ACM |
1463 | int ret = -1; |
1464 | size_t i; | |
cfd70a26 | 1465 | |
be199ada ACM |
1466 | for (i = 0; i < npids; ++i) { |
1467 | if (i == 0) { | |
1468 | if (asprintf(&filter, "common_pid != %d", pids[i]) < 0) | |
1469 | return -1; | |
1470 | } else { | |
1471 | char *tmp; | |
1472 | ||
1473 | if (asprintf(&tmp, "%s && common_pid != %d", filter, pids[i]) < 0) | |
1474 | goto out_free; | |
1475 | ||
1476 | free(filter); | |
1477 | filter = tmp; | |
1478 | } | |
1479 | } | |
cfd70a26 ACM |
1480 | |
1481 | ret = perf_evlist__set_filter(evlist, filter); | |
be199ada | 1482 | out_free: |
cfd70a26 ACM |
1483 | free(filter); |
1484 | return ret; | |
1485 | } | |
1486 | ||
be199ada ACM |
1487 | int perf_evlist__set_filter_pid(struct perf_evlist *evlist, pid_t pid) |
1488 | { | |
1489 | return perf_evlist__set_filter_pids(evlist, 1, &pid); | |
1490 | } | |
1491 | ||
0c21f736 | 1492 | bool perf_evlist__valid_sample_type(struct perf_evlist *evlist) |
74429964 | 1493 | { |
75562573 | 1494 | struct perf_evsel *pos; |
c2a70653 | 1495 | |
75562573 AH |
1496 | if (evlist->nr_entries == 1) |
1497 | return true; | |
1498 | ||
1499 | if (evlist->id_pos < 0 || evlist->is_pos < 0) | |
1500 | return false; | |
1501 | ||
e5cadb93 | 1502 | evlist__for_each_entry(evlist, pos) { |
75562573 AH |
1503 | if (pos->id_pos != evlist->id_pos || |
1504 | pos->is_pos != evlist->is_pos) | |
c2a70653 | 1505 | return false; |
74429964 FW |
1506 | } |
1507 | ||
c2a70653 | 1508 | return true; |
74429964 FW |
1509 | } |
1510 | ||
75562573 | 1511 | u64 __perf_evlist__combined_sample_type(struct perf_evlist *evlist) |
c2a70653 | 1512 | { |
75562573 AH |
1513 | struct perf_evsel *evsel; |
1514 | ||
1515 | if (evlist->combined_sample_type) | |
1516 | return evlist->combined_sample_type; | |
1517 | ||
e5cadb93 | 1518 | evlist__for_each_entry(evlist, evsel) |
75562573 AH |
1519 | evlist->combined_sample_type |= evsel->attr.sample_type; |
1520 | ||
1521 | return evlist->combined_sample_type; | |
1522 | } | |
1523 | ||
1524 | u64 perf_evlist__combined_sample_type(struct perf_evlist *evlist) | |
1525 | { | |
1526 | evlist->combined_sample_type = 0; | |
1527 | return __perf_evlist__combined_sample_type(evlist); | |
c2a70653 ACM |
1528 | } |
1529 | ||
98df858e AK |
1530 | u64 perf_evlist__combined_branch_type(struct perf_evlist *evlist) |
1531 | { | |
1532 | struct perf_evsel *evsel; | |
1533 | u64 branch_type = 0; | |
1534 | ||
e5cadb93 | 1535 | evlist__for_each_entry(evlist, evsel) |
98df858e AK |
1536 | branch_type |= evsel->attr.branch_sample_type; |
1537 | return branch_type; | |
1538 | } | |
1539 | ||
9ede473c JO |
1540 | bool perf_evlist__valid_read_format(struct perf_evlist *evlist) |
1541 | { | |
1542 | struct perf_evsel *first = perf_evlist__first(evlist), *pos = first; | |
1543 | u64 read_format = first->attr.read_format; | |
1544 | u64 sample_type = first->attr.sample_type; | |
1545 | ||
e5cadb93 | 1546 | evlist__for_each_entry(evlist, pos) { |
9ede473c JO |
1547 | if (read_format != pos->attr.read_format) |
1548 | return false; | |
1549 | } | |
1550 | ||
1551 | /* PERF_SAMPLE_READ imples PERF_FORMAT_ID. */ | |
1552 | if ((sample_type & PERF_SAMPLE_READ) && | |
1553 | !(read_format & PERF_FORMAT_ID)) { | |
1554 | return false; | |
1555 | } | |
1556 | ||
1557 | return true; | |
1558 | } | |
1559 | ||
1560 | u64 perf_evlist__read_format(struct perf_evlist *evlist) | |
1561 | { | |
1562 | struct perf_evsel *first = perf_evlist__first(evlist); | |
1563 | return first->attr.read_format; | |
1564 | } | |
1565 | ||
0c21f736 | 1566 | u16 perf_evlist__id_hdr_size(struct perf_evlist *evlist) |
81e36bff | 1567 | { |
0c21f736 | 1568 | struct perf_evsel *first = perf_evlist__first(evlist); |
81e36bff ACM |
1569 | struct perf_sample *data; |
1570 | u64 sample_type; | |
1571 | u16 size = 0; | |
1572 | ||
81e36bff ACM |
1573 | if (!first->attr.sample_id_all) |
1574 | goto out; | |
1575 | ||
1576 | sample_type = first->attr.sample_type; | |
1577 | ||
1578 | if (sample_type & PERF_SAMPLE_TID) | |
1579 | size += sizeof(data->tid) * 2; | |
1580 | ||
1581 | if (sample_type & PERF_SAMPLE_TIME) | |
1582 | size += sizeof(data->time); | |
1583 | ||
1584 | if (sample_type & PERF_SAMPLE_ID) | |
1585 | size += sizeof(data->id); | |
1586 | ||
1587 | if (sample_type & PERF_SAMPLE_STREAM_ID) | |
1588 | size += sizeof(data->stream_id); | |
1589 | ||
1590 | if (sample_type & PERF_SAMPLE_CPU) | |
1591 | size += sizeof(data->cpu) * 2; | |
75562573 AH |
1592 | |
1593 | if (sample_type & PERF_SAMPLE_IDENTIFIER) | |
1594 | size += sizeof(data->id); | |
81e36bff ACM |
1595 | out: |
1596 | return size; | |
1597 | } | |
1598 | ||
0c21f736 | 1599 | bool perf_evlist__valid_sample_id_all(struct perf_evlist *evlist) |
74429964 | 1600 | { |
0c21f736 | 1601 | struct perf_evsel *first = perf_evlist__first(evlist), *pos = first; |
c2a70653 | 1602 | |
e5cadb93 | 1603 | evlist__for_each_entry_continue(evlist, pos) { |
c2a70653 ACM |
1604 | if (first->attr.sample_id_all != pos->attr.sample_id_all) |
1605 | return false; | |
74429964 FW |
1606 | } |
1607 | ||
c2a70653 ACM |
1608 | return true; |
1609 | } | |
1610 | ||
0c21f736 | 1611 | bool perf_evlist__sample_id_all(struct perf_evlist *evlist) |
c2a70653 | 1612 | { |
0c21f736 | 1613 | struct perf_evsel *first = perf_evlist__first(evlist); |
c2a70653 | 1614 | return first->attr.sample_id_all; |
74429964 | 1615 | } |
81cce8de ACM |
1616 | |
1617 | void perf_evlist__set_selected(struct perf_evlist *evlist, | |
1618 | struct perf_evsel *evsel) | |
1619 | { | |
1620 | evlist->selected = evsel; | |
1621 | } | |
727ab04e | 1622 | |
a74b4b66 NK |
1623 | void perf_evlist__close(struct perf_evlist *evlist) |
1624 | { | |
1625 | struct perf_evsel *evsel; | |
1626 | int ncpus = cpu_map__nr(evlist->cpus); | |
1627 | int nthreads = thread_map__nr(evlist->threads); | |
1628 | ||
e5cadb93 | 1629 | evlist__for_each_entry_reverse(evlist, evsel) { |
18ef15c6 | 1630 | int n = evsel->cpus ? evsel->cpus->nr : ncpus; |
8ad9219e SE |
1631 | perf_evsel__close(evsel, n, nthreads); |
1632 | } | |
a74b4b66 NK |
1633 | } |
1634 | ||
4112eb18 ACM |
1635 | static int perf_evlist__create_syswide_maps(struct perf_evlist *evlist) |
1636 | { | |
8c0498b6 AH |
1637 | struct cpu_map *cpus; |
1638 | struct thread_map *threads; | |
4112eb18 ACM |
1639 | int err = -ENOMEM; |
1640 | ||
1641 | /* | |
1642 | * Try reading /sys/devices/system/cpu/online to get | |
1643 | * an all cpus map. | |
1644 | * | |
1645 | * FIXME: -ENOMEM is the best we can do here, the cpu_map | |
1646 | * code needs an overhaul to properly forward the | |
1647 | * error, and we may not want to do that fallback to a | |
1648 | * default cpu identity map :-\ | |
1649 | */ | |
8c0498b6 AH |
1650 | cpus = cpu_map__new(NULL); |
1651 | if (!cpus) | |
4112eb18 ACM |
1652 | goto out; |
1653 | ||
8c0498b6 AH |
1654 | threads = thread_map__new_dummy(); |
1655 | if (!threads) | |
1656 | goto out_put; | |
4112eb18 | 1657 | |
8c0498b6 | 1658 | perf_evlist__set_maps(evlist, cpus, threads); |
4112eb18 ACM |
1659 | out: |
1660 | return err; | |
8c0498b6 AH |
1661 | out_put: |
1662 | cpu_map__put(cpus); | |
4112eb18 ACM |
1663 | goto out; |
1664 | } | |
1665 | ||
6a4bb04c | 1666 | int perf_evlist__open(struct perf_evlist *evlist) |
727ab04e | 1667 | { |
6a4bb04c | 1668 | struct perf_evsel *evsel; |
a74b4b66 | 1669 | int err; |
727ab04e | 1670 | |
4112eb18 ACM |
1671 | /* |
1672 | * Default: one fd per CPU, all threads, aka systemwide | |
1673 | * as sys_perf_event_open(cpu = -1, thread = -1) is EINVAL | |
1674 | */ | |
1675 | if (evlist->threads == NULL && evlist->cpus == NULL) { | |
1676 | err = perf_evlist__create_syswide_maps(evlist); | |
1677 | if (err < 0) | |
1678 | goto out_err; | |
1679 | } | |
1680 | ||
733cd2fe AH |
1681 | perf_evlist__update_id_pos(evlist); |
1682 | ||
e5cadb93 | 1683 | evlist__for_each_entry(evlist, evsel) { |
23df7f79 | 1684 | err = perf_evsel__open(evsel, evsel->cpus, evsel->threads); |
727ab04e ACM |
1685 | if (err < 0) |
1686 | goto out_err; | |
1687 | } | |
1688 | ||
1689 | return 0; | |
1690 | out_err: | |
a74b4b66 | 1691 | perf_evlist__close(evlist); |
41c21a68 | 1692 | errno = -err; |
727ab04e ACM |
1693 | return err; |
1694 | } | |
35b9d88e | 1695 | |
602ad878 | 1696 | int perf_evlist__prepare_workload(struct perf_evlist *evlist, struct target *target, |
55e162ea | 1697 | const char *argv[], bool pipe_output, |
735f7e0b | 1698 | void (*exec_error)(int signo, siginfo_t *info, void *ucontext)) |
35b9d88e ACM |
1699 | { |
1700 | int child_ready_pipe[2], go_pipe[2]; | |
1701 | char bf; | |
1702 | ||
1703 | if (pipe(child_ready_pipe) < 0) { | |
1704 | perror("failed to create 'ready' pipe"); | |
1705 | return -1; | |
1706 | } | |
1707 | ||
1708 | if (pipe(go_pipe) < 0) { | |
1709 | perror("failed to create 'go' pipe"); | |
1710 | goto out_close_ready_pipe; | |
1711 | } | |
1712 | ||
1713 | evlist->workload.pid = fork(); | |
1714 | if (evlist->workload.pid < 0) { | |
1715 | perror("failed to fork"); | |
1716 | goto out_close_pipes; | |
1717 | } | |
1718 | ||
1719 | if (!evlist->workload.pid) { | |
5f1c4225 ACM |
1720 | int ret; |
1721 | ||
119fa3c9 | 1722 | if (pipe_output) |
35b9d88e ACM |
1723 | dup2(2, 1); |
1724 | ||
0817df08 DA |
1725 | signal(SIGTERM, SIG_DFL); |
1726 | ||
35b9d88e ACM |
1727 | close(child_ready_pipe[0]); |
1728 | close(go_pipe[1]); | |
1729 | fcntl(go_pipe[0], F_SETFD, FD_CLOEXEC); | |
1730 | ||
35b9d88e ACM |
1731 | /* |
1732 | * Tell the parent we're ready to go | |
1733 | */ | |
1734 | close(child_ready_pipe[1]); | |
1735 | ||
1736 | /* | |
1737 | * Wait until the parent tells us to go. | |
1738 | */ | |
5f1c4225 ACM |
1739 | ret = read(go_pipe[0], &bf, 1); |
1740 | /* | |
1741 | * The parent will ask for the execvp() to be performed by | |
1742 | * writing exactly one byte, in workload.cork_fd, usually via | |
1743 | * perf_evlist__start_workload(). | |
1744 | * | |
20f86fc1 | 1745 | * For cancelling the workload without actually running it, |
5f1c4225 ACM |
1746 | * the parent will just close workload.cork_fd, without writing |
1747 | * anything, i.e. read will return zero and we just exit() | |
1748 | * here. | |
1749 | */ | |
1750 | if (ret != 1) { | |
1751 | if (ret == -1) | |
1752 | perror("unable to read pipe"); | |
1753 | exit(ret); | |
1754 | } | |
35b9d88e ACM |
1755 | |
1756 | execvp(argv[0], (char **)argv); | |
1757 | ||
735f7e0b | 1758 | if (exec_error) { |
f33cbe72 ACM |
1759 | union sigval val; |
1760 | ||
1761 | val.sival_int = errno; | |
1762 | if (sigqueue(getppid(), SIGUSR1, val)) | |
1763 | perror(argv[0]); | |
1764 | } else | |
1765 | perror(argv[0]); | |
35b9d88e ACM |
1766 | exit(-1); |
1767 | } | |
1768 | ||
735f7e0b ACM |
1769 | if (exec_error) { |
1770 | struct sigaction act = { | |
1771 | .sa_flags = SA_SIGINFO, | |
1772 | .sa_sigaction = exec_error, | |
1773 | }; | |
1774 | sigaction(SIGUSR1, &act, NULL); | |
1775 | } | |
1776 | ||
1aaf63b1 ACM |
1777 | if (target__none(target)) { |
1778 | if (evlist->threads == NULL) { | |
1779 | fprintf(stderr, "FATAL: evlist->threads need to be set at this point (%s:%d).\n", | |
1780 | __func__, __LINE__); | |
1781 | goto out_close_pipes; | |
1782 | } | |
e13798c7 | 1783 | thread_map__set_pid(evlist->threads, 0, evlist->workload.pid); |
1aaf63b1 | 1784 | } |
35b9d88e ACM |
1785 | |
1786 | close(child_ready_pipe[1]); | |
1787 | close(go_pipe[0]); | |
1788 | /* | |
1789 | * wait for child to settle | |
1790 | */ | |
1791 | if (read(child_ready_pipe[0], &bf, 1) == -1) { | |
1792 | perror("unable to read pipe"); | |
1793 | goto out_close_pipes; | |
1794 | } | |
1795 | ||
bcf3145f | 1796 | fcntl(go_pipe[1], F_SETFD, FD_CLOEXEC); |
35b9d88e ACM |
1797 | evlist->workload.cork_fd = go_pipe[1]; |
1798 | close(child_ready_pipe[0]); | |
1799 | return 0; | |
1800 | ||
1801 | out_close_pipes: | |
1802 | close(go_pipe[0]); | |
1803 | close(go_pipe[1]); | |
1804 | out_close_ready_pipe: | |
1805 | close(child_ready_pipe[0]); | |
1806 | close(child_ready_pipe[1]); | |
1807 | return -1; | |
1808 | } | |
1809 | ||
1810 | int perf_evlist__start_workload(struct perf_evlist *evlist) | |
1811 | { | |
1812 | if (evlist->workload.cork_fd > 0) { | |
b3824404 | 1813 | char bf = 0; |
bcf3145f | 1814 | int ret; |
35b9d88e ACM |
1815 | /* |
1816 | * Remove the cork, let it rip! | |
1817 | */ | |
bcf3145f NK |
1818 | ret = write(evlist->workload.cork_fd, &bf, 1); |
1819 | if (ret < 0) | |
e978be9e | 1820 | perror("unable to write to pipe"); |
bcf3145f NK |
1821 | |
1822 | close(evlist->workload.cork_fd); | |
1823 | return ret; | |
35b9d88e ACM |
1824 | } |
1825 | ||
1826 | return 0; | |
1827 | } | |
cb0b29e0 | 1828 | |
a3f698fe | 1829 | int perf_evlist__parse_sample(struct perf_evlist *evlist, union perf_event *event, |
0807d2d8 | 1830 | struct perf_sample *sample) |
cb0b29e0 | 1831 | { |
75562573 AH |
1832 | struct perf_evsel *evsel = perf_evlist__event2evsel(evlist, event); |
1833 | ||
1834 | if (!evsel) | |
1835 | return -EFAULT; | |
0807d2d8 | 1836 | return perf_evsel__parse_sample(evsel, event, sample); |
cb0b29e0 | 1837 | } |
78f067b3 ACM |
1838 | |
1839 | size_t perf_evlist__fprintf(struct perf_evlist *evlist, FILE *fp) | |
1840 | { | |
1841 | struct perf_evsel *evsel; | |
1842 | size_t printed = 0; | |
1843 | ||
e5cadb93 | 1844 | evlist__for_each_entry(evlist, evsel) { |
78f067b3 ACM |
1845 | printed += fprintf(fp, "%s%s", evsel->idx ? ", " : "", |
1846 | perf_evsel__name(evsel)); | |
1847 | } | |
1848 | ||
b2222139 | 1849 | return printed + fprintf(fp, "\n"); |
78f067b3 | 1850 | } |
6ef068cb | 1851 | |
d9aade7f | 1852 | int perf_evlist__strerror_open(struct perf_evlist *evlist, |
a8f23d8f ACM |
1853 | int err, char *buf, size_t size) |
1854 | { | |
1855 | int printed, value; | |
c8b5f2c9 | 1856 | char sbuf[STRERR_BUFSIZE], *emsg = str_error_r(err, sbuf, sizeof(sbuf)); |
a8f23d8f ACM |
1857 | |
1858 | switch (err) { | |
1859 | case EACCES: | |
1860 | case EPERM: | |
1861 | printed = scnprintf(buf, size, | |
1862 | "Error:\t%s.\n" | |
1863 | "Hint:\tCheck /proc/sys/kernel/perf_event_paranoid setting.", emsg); | |
1864 | ||
1a47245d | 1865 | value = perf_event_paranoid(); |
a8f23d8f ACM |
1866 | |
1867 | printed += scnprintf(buf + printed, size - printed, "\nHint:\t"); | |
1868 | ||
1869 | if (value >= 2) { | |
1870 | printed += scnprintf(buf + printed, size - printed, | |
1871 | "For your workloads it needs to be <= 1\nHint:\t"); | |
1872 | } | |
1873 | printed += scnprintf(buf + printed, size - printed, | |
5229e366 | 1874 | "For system wide tracing it needs to be set to -1.\n"); |
a8f23d8f ACM |
1875 | |
1876 | printed += scnprintf(buf + printed, size - printed, | |
5229e366 ACM |
1877 | "Hint:\tTry: 'sudo sh -c \"echo -1 > /proc/sys/kernel/perf_event_paranoid\"'\n" |
1878 | "Hint:\tThe current value is %d.", value); | |
a8f23d8f | 1879 | break; |
d9aade7f ACM |
1880 | case EINVAL: { |
1881 | struct perf_evsel *first = perf_evlist__first(evlist); | |
1882 | int max_freq; | |
1883 | ||
1884 | if (sysctl__read_int("kernel/perf_event_max_sample_rate", &max_freq) < 0) | |
1885 | goto out_default; | |
1886 | ||
1887 | if (first->attr.sample_freq < (u64)max_freq) | |
1888 | goto out_default; | |
1889 | ||
1890 | printed = scnprintf(buf, size, | |
1891 | "Error:\t%s.\n" | |
1892 | "Hint:\tCheck /proc/sys/kernel/perf_event_max_sample_rate.\n" | |
1893 | "Hint:\tThe current value is %d and %" PRIu64 " is being requested.", | |
1894 | emsg, max_freq, first->attr.sample_freq); | |
1895 | break; | |
1896 | } | |
a8f23d8f | 1897 | default: |
d9aade7f | 1898 | out_default: |
a8f23d8f ACM |
1899 | scnprintf(buf, size, "%s", emsg); |
1900 | break; | |
1901 | } | |
1902 | ||
1903 | return 0; | |
1904 | } | |
a025e4f0 | 1905 | |
956fa571 ACM |
1906 | int perf_evlist__strerror_mmap(struct perf_evlist *evlist, int err, char *buf, size_t size) |
1907 | { | |
c8b5f2c9 | 1908 | char sbuf[STRERR_BUFSIZE], *emsg = str_error_r(err, sbuf, sizeof(sbuf)); |
e965bea1 | 1909 | int pages_attempted = evlist->mmap_len / 1024, pages_max_per_user, printed = 0; |
956fa571 ACM |
1910 | |
1911 | switch (err) { | |
1912 | case EPERM: | |
e5d4a290 | 1913 | sysctl__read_int("kernel/perf_event_mlock_kb", &pages_max_per_user); |
e965bea1 ACM |
1914 | printed += scnprintf(buf + printed, size - printed, |
1915 | "Error:\t%s.\n" | |
956fa571 | 1916 | "Hint:\tCheck /proc/sys/kernel/perf_event_mlock_kb (%d kB) setting.\n" |
e965bea1 | 1917 | "Hint:\tTried using %zd kB.\n", |
e5d4a290 | 1918 | emsg, pages_max_per_user, pages_attempted); |
e965bea1 ACM |
1919 | |
1920 | if (pages_attempted >= pages_max_per_user) { | |
1921 | printed += scnprintf(buf + printed, size - printed, | |
1922 | "Hint:\tTry 'sudo sh -c \"echo %d > /proc/sys/kernel/perf_event_mlock_kb\"', or\n", | |
1923 | pages_max_per_user + pages_attempted); | |
1924 | } | |
1925 | ||
1926 | printed += scnprintf(buf + printed, size - printed, | |
1927 | "Hint:\tTry using a smaller -m/--mmap-pages value."); | |
956fa571 ACM |
1928 | break; |
1929 | default: | |
1930 | scnprintf(buf, size, "%s", emsg); | |
1931 | break; | |
1932 | } | |
1933 | ||
1934 | return 0; | |
1935 | } | |
1936 | ||
a025e4f0 AH |
1937 | void perf_evlist__to_front(struct perf_evlist *evlist, |
1938 | struct perf_evsel *move_evsel) | |
1939 | { | |
1940 | struct perf_evsel *evsel, *n; | |
1941 | LIST_HEAD(move); | |
1942 | ||
1943 | if (move_evsel == perf_evlist__first(evlist)) | |
1944 | return; | |
1945 | ||
e5cadb93 | 1946 | evlist__for_each_entry_safe(evlist, n, evsel) { |
a025e4f0 AH |
1947 | if (evsel->leader == move_evsel->leader) |
1948 | list_move_tail(&evsel->node, &move); | |
1949 | } | |
1950 | ||
1951 | list_splice(&move, &evlist->entries); | |
1952 | } | |
60b0896c AH |
1953 | |
1954 | void perf_evlist__set_tracking_event(struct perf_evlist *evlist, | |
1955 | struct perf_evsel *tracking_evsel) | |
1956 | { | |
1957 | struct perf_evsel *evsel; | |
1958 | ||
1959 | if (tracking_evsel->tracking) | |
1960 | return; | |
1961 | ||
e5cadb93 | 1962 | evlist__for_each_entry(evlist, evsel) { |
60b0896c AH |
1963 | if (evsel != tracking_evsel) |
1964 | evsel->tracking = false; | |
1965 | } | |
1966 | ||
1967 | tracking_evsel->tracking = true; | |
1968 | } | |
7630b3e2 WN |
1969 | |
1970 | struct perf_evsel * | |
1971 | perf_evlist__find_evsel_by_str(struct perf_evlist *evlist, | |
1972 | const char *str) | |
1973 | { | |
1974 | struct perf_evsel *evsel; | |
1975 | ||
e5cadb93 | 1976 | evlist__for_each_entry(evlist, evsel) { |
7630b3e2 WN |
1977 | if (!evsel->name) |
1978 | continue; | |
1979 | if (strcmp(str, evsel->name) == 0) | |
1980 | return evsel; | |
1981 | } | |
1982 | ||
1983 | return NULL; | |
1984 | } | |
54cc54de WN |
1985 | |
1986 | void perf_evlist__toggle_bkw_mmap(struct perf_evlist *evlist, | |
1987 | enum bkw_mmap_state state) | |
1988 | { | |
1989 | enum bkw_mmap_state old_state = evlist->bkw_mmap_state; | |
1990 | enum action { | |
1991 | NONE, | |
1992 | PAUSE, | |
1993 | RESUME, | |
1994 | } action = NONE; | |
1995 | ||
1996 | if (!evlist->backward_mmap) | |
1997 | return; | |
1998 | ||
1999 | switch (old_state) { | |
2000 | case BKW_MMAP_NOTREADY: { | |
2001 | if (state != BKW_MMAP_RUNNING) | |
2002 | goto state_err;; | |
2003 | break; | |
2004 | } | |
2005 | case BKW_MMAP_RUNNING: { | |
2006 | if (state != BKW_MMAP_DATA_PENDING) | |
2007 | goto state_err; | |
2008 | action = PAUSE; | |
2009 | break; | |
2010 | } | |
2011 | case BKW_MMAP_DATA_PENDING: { | |
2012 | if (state != BKW_MMAP_EMPTY) | |
2013 | goto state_err; | |
2014 | break; | |
2015 | } | |
2016 | case BKW_MMAP_EMPTY: { | |
2017 | if (state != BKW_MMAP_RUNNING) | |
2018 | goto state_err; | |
2019 | action = RESUME; | |
2020 | break; | |
2021 | } | |
2022 | default: | |
2023 | WARN_ONCE(1, "Shouldn't get there\n"); | |
2024 | } | |
2025 | ||
2026 | evlist->bkw_mmap_state = state; | |
2027 | ||
2028 | switch (action) { | |
2029 | case PAUSE: | |
2030 | perf_evlist__pause(evlist); | |
2031 | break; | |
2032 | case RESUME: | |
2033 | perf_evlist__resume(evlist); | |
2034 | break; | |
2035 | case NONE: | |
2036 | default: | |
2037 | break; | |
2038 | } | |
2039 | ||
2040 | state_err: | |
2041 | return; | |
2042 | } |