Commit | Line | Data |
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91007045 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
f8a95309 ACM |
2 | /* |
3 | * Copyright (C) 2011, Red Hat Inc, Arnaldo Carvalho de Melo <acme@redhat.com> | |
4 | * | |
5 | * Parts came from builtin-{top,stat,record}.c, see those files for further | |
6 | * copyright notes. | |
f8a95309 | 7 | */ |
956fa571 | 8 | #include <api/fs/fs.h> |
a43783ae | 9 | #include <errno.h> |
fd20e811 | 10 | #include <inttypes.h> |
5c581041 | 11 | #include <poll.h> |
f8a95309 | 12 | #include "cpumap.h" |
e0fcfb08 | 13 | #include "util/mmap.h" |
f8a95309 | 14 | #include "thread_map.h" |
12864b31 | 15 | #include "target.h" |
361c99a6 ACM |
16 | #include "evlist.h" |
17 | #include "evsel.h" | |
e3e1a54f | 18 | #include "debug.h" |
58db1d6e | 19 | #include "units.h" |
fb71c86c | 20 | #include "util.h" // page_size |
c1a604df | 21 | #include "../perf.h" |
54cc54de | 22 | #include "asm/bug.h" |
657ee553 | 23 | #include "bpf-event.h" |
9607ad3a | 24 | #include <signal.h> |
35b9d88e | 25 | #include <unistd.h> |
b397f846 | 26 | #include <sched.h> |
f2a39fe8 | 27 | #include <stdlib.h> |
361c99a6 | 28 | |
50d08e47 | 29 | #include "parse-events.h" |
4b6ab94e | 30 | #include <subcmd/parse-options.h> |
50d08e47 | 31 | |
bafae98e | 32 | #include <fcntl.h> |
86a5e0c2 | 33 | #include <sys/ioctl.h> |
f8a95309 ACM |
34 | #include <sys/mman.h> |
35 | ||
70db7533 ACM |
36 | #include <linux/bitops.h> |
37 | #include <linux/hash.h> | |
0389cd1f | 38 | #include <linux/log2.h> |
8dd2a131 | 39 | #include <linux/err.h> |
8520a98d | 40 | #include <linux/string.h> |
7f7c536f | 41 | #include <linux/zalloc.h> |
4562a739 | 42 | #include <perf/evlist.h> |
88761fa1 | 43 | #include <perf/evsel.h> |
9c3516d1 | 44 | #include <perf/cpumap.h> |
70db7533 | 45 | |
e14e5497 ACM |
46 | #include <internal/xyarray.h> |
47 | ||
748fe088 ACM |
48 | #ifdef LACKS_SIGQUEUE_PROTOTYPE |
49 | int sigqueue(pid_t pid, int sig, const union sigval value); | |
50 | #endif | |
51 | ||
9dfcb759 | 52 | #define FD(e, x, y) (*(int *)xyarray__entry(e->core.fd, x, y)) |
a91e5431 | 53 | #define SID(e, x, y) xyarray__entry(e->sample_id, x, y) |
f8a95309 | 54 | |
52c86bca JO |
55 | void evlist__init(struct evlist *evlist, struct perf_cpu_map *cpus, |
56 | struct perf_thread_map *threads) | |
ef1d1af2 ACM |
57 | { |
58 | int i; | |
59 | ||
60 | for (i = 0; i < PERF_EVLIST__HLIST_SIZE; ++i) | |
61 | INIT_HLIST_HEAD(&evlist->heads[i]); | |
4562a739 | 62 | perf_evlist__init(&evlist->core); |
453fa030 | 63 | perf_evlist__set_maps(&evlist->core, cpus, threads); |
40cb2d51 | 64 | fdarray__init(&evlist->core.pollfd, 64); |
35b9d88e | 65 | evlist->workload.pid = -1; |
54cc54de | 66 | evlist->bkw_mmap_state = BKW_MMAP_NOTREADY; |
ef1d1af2 ACM |
67 | } |
68 | ||
0f98b11c | 69 | struct evlist *evlist__new(void) |
361c99a6 | 70 | { |
63503dba | 71 | struct evlist *evlist = zalloc(sizeof(*evlist)); |
361c99a6 | 72 | |
ef1d1af2 | 73 | if (evlist != NULL) |
52c86bca | 74 | evlist__init(evlist, NULL, NULL); |
361c99a6 ACM |
75 | |
76 | return evlist; | |
77 | } | |
78 | ||
63503dba | 79 | struct evlist *perf_evlist__new_default(void) |
b22d54b0 | 80 | { |
0f98b11c | 81 | struct evlist *evlist = evlist__new(); |
b22d54b0 JO |
82 | |
83 | if (evlist && perf_evlist__add_default(evlist)) { | |
c12995a5 | 84 | evlist__delete(evlist); |
b22d54b0 JO |
85 | evlist = NULL; |
86 | } | |
87 | ||
88 | return evlist; | |
89 | } | |
90 | ||
63503dba | 91 | struct evlist *perf_evlist__new_dummy(void) |
5bae0250 | 92 | { |
0f98b11c | 93 | struct evlist *evlist = evlist__new(); |
5bae0250 ACM |
94 | |
95 | if (evlist && perf_evlist__add_dummy(evlist)) { | |
c12995a5 | 96 | evlist__delete(evlist); |
5bae0250 ACM |
97 | evlist = NULL; |
98 | } | |
99 | ||
100 | return evlist; | |
101 | } | |
102 | ||
75562573 AH |
103 | /** |
104 | * perf_evlist__set_id_pos - set the positions of event ids. | |
105 | * @evlist: selected event list | |
106 | * | |
107 | * Events with compatible sample types all have the same id_pos | |
108 | * and is_pos. For convenience, put a copy on evlist. | |
109 | */ | |
63503dba | 110 | void perf_evlist__set_id_pos(struct evlist *evlist) |
75562573 | 111 | { |
32dcd021 | 112 | struct evsel *first = perf_evlist__first(evlist); |
75562573 AH |
113 | |
114 | evlist->id_pos = first->id_pos; | |
115 | evlist->is_pos = first->is_pos; | |
116 | } | |
117 | ||
63503dba | 118 | static void perf_evlist__update_id_pos(struct evlist *evlist) |
733cd2fe | 119 | { |
32dcd021 | 120 | struct evsel *evsel; |
733cd2fe | 121 | |
e5cadb93 | 122 | evlist__for_each_entry(evlist, evsel) |
733cd2fe AH |
123 | perf_evsel__calc_id_pos(evsel); |
124 | ||
125 | perf_evlist__set_id_pos(evlist); | |
126 | } | |
127 | ||
e6b1878d | 128 | static void evlist__purge(struct evlist *evlist) |
361c99a6 | 129 | { |
32dcd021 | 130 | struct evsel *pos, *n; |
361c99a6 | 131 | |
e5cadb93 | 132 | evlist__for_each_entry_safe(evlist, n, pos) { |
b27c4ece | 133 | list_del_init(&pos->core.node); |
d49e4695 | 134 | pos->evlist = NULL; |
5eb2dd2a | 135 | evsel__delete(pos); |
361c99a6 ACM |
136 | } |
137 | ||
6484d2f9 | 138 | evlist->core.nr_entries = 0; |
361c99a6 ACM |
139 | } |
140 | ||
470579b0 | 141 | void evlist__exit(struct evlist *evlist) |
361c99a6 | 142 | { |
04662523 | 143 | zfree(&evlist->mmap); |
0b72d69a | 144 | zfree(&evlist->overwrite_mmap); |
40cb2d51 | 145 | fdarray__exit(&evlist->core.pollfd); |
ef1d1af2 ACM |
146 | } |
147 | ||
c12995a5 | 148 | void evlist__delete(struct evlist *evlist) |
ef1d1af2 | 149 | { |
0b04b3dc ACM |
150 | if (evlist == NULL) |
151 | return; | |
152 | ||
db6b7b13 | 153 | evlist__munmap(evlist); |
750b4ede | 154 | evlist__close(evlist); |
f72f901d | 155 | perf_cpu_map__put(evlist->core.cpus); |
03617c22 | 156 | perf_thread_map__put(evlist->core.threads); |
f72f901d | 157 | evlist->core.cpus = NULL; |
03617c22 | 158 | evlist->core.threads = NULL; |
e6b1878d | 159 | evlist__purge(evlist); |
470579b0 | 160 | evlist__exit(evlist); |
361c99a6 ACM |
161 | free(evlist); |
162 | } | |
163 | ||
a1cf3a75 | 164 | void evlist__add(struct evlist *evlist, struct evsel *entry) |
361c99a6 | 165 | { |
d49e4695 | 166 | entry->evlist = evlist; |
6484d2f9 | 167 | entry->idx = evlist->core.nr_entries; |
60b0896c | 168 | entry->tracking = !entry->idx; |
ef503831 | 169 | |
6484d2f9 JO |
170 | perf_evlist__add(&evlist->core, &entry->core); |
171 | ||
172 | if (evlist->core.nr_entries == 1) | |
75562573 | 173 | perf_evlist__set_id_pos(evlist); |
361c99a6 ACM |
174 | } |
175 | ||
16251027 | 176 | void evlist__remove(struct evlist *evlist, struct evsel *evsel) |
4768230a AH |
177 | { |
178 | evsel->evlist = NULL; | |
52e22fb8 | 179 | perf_evlist__remove(&evlist->core, &evsel->core); |
4768230a AH |
180 | } |
181 | ||
63503dba | 182 | void perf_evlist__splice_list_tail(struct evlist *evlist, |
f114d6ef | 183 | struct list_head *list) |
50d08e47 | 184 | { |
32dcd021 | 185 | struct evsel *evsel, *temp; |
75562573 | 186 | |
e5cadb93 | 187 | __evlist__for_each_entry_safe(list, temp, evsel) { |
b27c4ece | 188 | list_del_init(&evsel->core.node); |
a1cf3a75 | 189 | evlist__add(evlist, evsel); |
f114d6ef | 190 | } |
50d08e47 ACM |
191 | } |
192 | ||
63dab225 ACM |
193 | void __perf_evlist__set_leader(struct list_head *list) |
194 | { | |
32dcd021 | 195 | struct evsel *evsel, *leader; |
63dab225 | 196 | |
b27c4ece JO |
197 | leader = list_entry(list->next, struct evsel, core.node); |
198 | evsel = list_entry(list->prev, struct evsel, core.node); | |
97f63e4a | 199 | |
5643b1a5 | 200 | leader->core.nr_members = evsel->idx - leader->idx + 1; |
63dab225 | 201 | |
e5cadb93 | 202 | __evlist__for_each_entry(list, evsel) { |
74b2133d | 203 | evsel->leader = leader; |
63dab225 ACM |
204 | } |
205 | } | |
206 | ||
63503dba | 207 | void perf_evlist__set_leader(struct evlist *evlist) |
6a4bb04c | 208 | { |
6484d2f9 JO |
209 | if (evlist->core.nr_entries) { |
210 | evlist->nr_groups = evlist->core.nr_entries > 1 ? 1 : 0; | |
ce9036a6 | 211 | __perf_evlist__set_leader(&evlist->core.entries); |
97f63e4a | 212 | } |
6a4bb04c JO |
213 | } |
214 | ||
63503dba | 215 | int __perf_evlist__add_default(struct evlist *evlist, bool precise) |
361c99a6 | 216 | { |
32dcd021 | 217 | struct evsel *evsel = perf_evsel__new_cycles(precise); |
1aed2671 | 218 | |
361c99a6 | 219 | if (evsel == NULL) |
7c48dcfd | 220 | return -ENOMEM; |
361c99a6 | 221 | |
a1cf3a75 | 222 | evlist__add(evlist, evsel); |
361c99a6 ACM |
223 | return 0; |
224 | } | |
5c581041 | 225 | |
63503dba | 226 | int perf_evlist__add_dummy(struct evlist *evlist) |
5bae0250 ACM |
227 | { |
228 | struct perf_event_attr attr = { | |
229 | .type = PERF_TYPE_SOFTWARE, | |
230 | .config = PERF_COUNT_SW_DUMMY, | |
231 | .size = sizeof(attr), /* to capture ABI version */ | |
232 | }; | |
6484d2f9 | 233 | struct evsel *evsel = perf_evsel__new_idx(&attr, evlist->core.nr_entries); |
5bae0250 ACM |
234 | |
235 | if (evsel == NULL) | |
236 | return -ENOMEM; | |
237 | ||
a1cf3a75 | 238 | evlist__add(evlist, evsel); |
5bae0250 ACM |
239 | return 0; |
240 | } | |
241 | ||
a1cf3a75 | 242 | static int evlist__add_attrs(struct evlist *evlist, |
e60fc847 | 243 | struct perf_event_attr *attrs, size_t nr_attrs) |
50d08e47 | 244 | { |
32dcd021 | 245 | struct evsel *evsel, *n; |
50d08e47 ACM |
246 | LIST_HEAD(head); |
247 | size_t i; | |
248 | ||
249 | for (i = 0; i < nr_attrs; i++) { | |
6484d2f9 | 250 | evsel = perf_evsel__new_idx(attrs + i, evlist->core.nr_entries + i); |
50d08e47 ACM |
251 | if (evsel == NULL) |
252 | goto out_delete_partial_list; | |
b27c4ece | 253 | list_add_tail(&evsel->core.node, &head); |
50d08e47 ACM |
254 | } |
255 | ||
f114d6ef | 256 | perf_evlist__splice_list_tail(evlist, &head); |
50d08e47 ACM |
257 | |
258 | return 0; | |
259 | ||
260 | out_delete_partial_list: | |
e5cadb93 | 261 | __evlist__for_each_entry_safe(&head, n, evsel) |
5eb2dd2a | 262 | evsel__delete(evsel); |
50d08e47 ACM |
263 | return -1; |
264 | } | |
265 | ||
63503dba | 266 | int __perf_evlist__add_default_attrs(struct evlist *evlist, |
79695e1b ACM |
267 | struct perf_event_attr *attrs, size_t nr_attrs) |
268 | { | |
269 | size_t i; | |
270 | ||
271 | for (i = 0; i < nr_attrs; i++) | |
272 | event_attr_init(attrs + i); | |
273 | ||
a1cf3a75 | 274 | return evlist__add_attrs(evlist, attrs, nr_attrs); |
79695e1b ACM |
275 | } |
276 | ||
32dcd021 | 277 | struct evsel * |
63503dba | 278 | perf_evlist__find_tracepoint_by_id(struct evlist *evlist, int id) |
ee29be62 | 279 | { |
32dcd021 | 280 | struct evsel *evsel; |
ee29be62 | 281 | |
e5cadb93 | 282 | evlist__for_each_entry(evlist, evsel) { |
1fc632ce JO |
283 | if (evsel->core.attr.type == PERF_TYPE_TRACEPOINT && |
284 | (int)evsel->core.attr.config == id) | |
ee29be62 ACM |
285 | return evsel; |
286 | } | |
287 | ||
288 | return NULL; | |
289 | } | |
290 | ||
32dcd021 | 291 | struct evsel * |
63503dba | 292 | perf_evlist__find_tracepoint_by_name(struct evlist *evlist, |
a2f2804a DA |
293 | const char *name) |
294 | { | |
32dcd021 | 295 | struct evsel *evsel; |
a2f2804a | 296 | |
e5cadb93 | 297 | evlist__for_each_entry(evlist, evsel) { |
1fc632ce | 298 | if ((evsel->core.attr.type == PERF_TYPE_TRACEPOINT) && |
a2f2804a DA |
299 | (strcmp(evsel->name, name) == 0)) |
300 | return evsel; | |
301 | } | |
302 | ||
303 | return NULL; | |
304 | } | |
305 | ||
63503dba | 306 | int perf_evlist__add_newtp(struct evlist *evlist, |
39876e7d ACM |
307 | const char *sys, const char *name, void *handler) |
308 | { | |
32dcd021 | 309 | struct evsel *evsel = perf_evsel__newtp(sys, name); |
39876e7d | 310 | |
8dd2a131 | 311 | if (IS_ERR(evsel)) |
39876e7d ACM |
312 | return -1; |
313 | ||
744a9719 | 314 | evsel->handler = handler; |
a1cf3a75 | 315 | evlist__add(evlist, evsel); |
39876e7d ACM |
316 | return 0; |
317 | } | |
318 | ||
63503dba | 319 | static int perf_evlist__nr_threads(struct evlist *evlist, |
32dcd021 | 320 | struct evsel *evsel) |
bf8e8f4b | 321 | { |
648b5af3 | 322 | if (evsel->core.system_wide) |
bf8e8f4b AH |
323 | return 1; |
324 | else | |
a2f354e3 | 325 | return perf_thread_map__nr(evlist->core.threads); |
bf8e8f4b AH |
326 | } |
327 | ||
e74676de | 328 | void evlist__disable(struct evlist *evlist) |
4152ab37 | 329 | { |
32dcd021 | 330 | struct evsel *pos; |
3e27c920 | 331 | |
e5cadb93 | 332 | evlist__for_each_entry(evlist, pos) { |
9dfcb759 | 333 | if (pos->disabled || !perf_evsel__is_group_leader(pos) || !pos->core.fd) |
3e27c920 | 334 | continue; |
9a10bb22 | 335 | evsel__disable(pos); |
4152ab37 | 336 | } |
2b56bcfb ACM |
337 | |
338 | evlist->enabled = false; | |
4152ab37 ACM |
339 | } |
340 | ||
1c87f165 | 341 | void evlist__enable(struct evlist *evlist) |
764e16a3 | 342 | { |
32dcd021 | 343 | struct evsel *pos; |
3e27c920 | 344 | |
e5cadb93 | 345 | evlist__for_each_entry(evlist, pos) { |
9dfcb759 | 346 | if (!perf_evsel__is_group_leader(pos) || !pos->core.fd) |
3e27c920 | 347 | continue; |
ec7f24ef | 348 | evsel__enable(pos); |
764e16a3 | 349 | } |
2b56bcfb ACM |
350 | |
351 | evlist->enabled = true; | |
352 | } | |
353 | ||
63503dba | 354 | void perf_evlist__toggle_enable(struct evlist *evlist) |
2b56bcfb | 355 | { |
e74676de | 356 | (evlist->enabled ? evlist__disable : evlist__enable)(evlist); |
764e16a3 DA |
357 | } |
358 | ||
63503dba | 359 | static int perf_evlist__enable_event_cpu(struct evlist *evlist, |
32dcd021 | 360 | struct evsel *evsel, int cpu) |
1c65056c | 361 | { |
18ef15c6 | 362 | int thread; |
1c65056c AH |
363 | int nr_threads = perf_evlist__nr_threads(evlist, evsel); |
364 | ||
9dfcb759 | 365 | if (!evsel->core.fd) |
1c65056c AH |
366 | return -EINVAL; |
367 | ||
368 | for (thread = 0; thread < nr_threads; thread++) { | |
18ef15c6 | 369 | int err = ioctl(FD(evsel, cpu, thread), PERF_EVENT_IOC_ENABLE, 0); |
1c65056c AH |
370 | if (err) |
371 | return err; | |
372 | } | |
373 | return 0; | |
374 | } | |
375 | ||
63503dba | 376 | static int perf_evlist__enable_event_thread(struct evlist *evlist, |
32dcd021 | 377 | struct evsel *evsel, |
1c65056c AH |
378 | int thread) |
379 | { | |
18ef15c6 | 380 | int cpu; |
6549cd8f | 381 | int nr_cpus = perf_cpu_map__nr(evlist->core.cpus); |
1c65056c | 382 | |
9dfcb759 | 383 | if (!evsel->core.fd) |
1c65056c AH |
384 | return -EINVAL; |
385 | ||
386 | for (cpu = 0; cpu < nr_cpus; cpu++) { | |
18ef15c6 | 387 | int err = ioctl(FD(evsel, cpu, thread), PERF_EVENT_IOC_ENABLE, 0); |
1c65056c AH |
388 | if (err) |
389 | return err; | |
390 | } | |
391 | return 0; | |
392 | } | |
393 | ||
63503dba | 394 | int perf_evlist__enable_event_idx(struct evlist *evlist, |
32dcd021 | 395 | struct evsel *evsel, int idx) |
1c65056c | 396 | { |
315c0a1f | 397 | bool per_cpu_mmaps = !perf_cpu_map__empty(evlist->core.cpus); |
1c65056c AH |
398 | |
399 | if (per_cpu_mmaps) | |
400 | return perf_evlist__enable_event_cpu(evlist, evsel, idx); | |
401 | else | |
402 | return perf_evlist__enable_event_thread(evlist, evsel, idx); | |
403 | } | |
404 | ||
63503dba | 405 | int perf_evlist__alloc_pollfd(struct evlist *evlist) |
5c581041 | 406 | { |
6549cd8f | 407 | int nr_cpus = perf_cpu_map__nr(evlist->core.cpus); |
a2f354e3 | 408 | int nr_threads = perf_thread_map__nr(evlist->core.threads); |
bf8e8f4b | 409 | int nfds = 0; |
32dcd021 | 410 | struct evsel *evsel; |
bf8e8f4b | 411 | |
e5cadb93 | 412 | evlist__for_each_entry(evlist, evsel) { |
648b5af3 | 413 | if (evsel->core.system_wide) |
bf8e8f4b AH |
414 | nfds += nr_cpus; |
415 | else | |
416 | nfds += nr_cpus * nr_threads; | |
417 | } | |
418 | ||
40cb2d51 JO |
419 | if (fdarray__available_entries(&evlist->core.pollfd) < nfds && |
420 | fdarray__grow(&evlist->core.pollfd, nfds) < 0) | |
ad6765dd ACM |
421 | return -ENOMEM; |
422 | ||
423 | return 0; | |
5c581041 | 424 | } |
70082dd9 | 425 | |
63503dba | 426 | static int __perf_evlist__add_pollfd(struct evlist *evlist, int fd, |
a5830532 | 427 | struct mmap *map, short revent) |
e4b356b5 | 428 | { |
40cb2d51 | 429 | int pos = fdarray__add(&evlist->core.pollfd, fd, revent | POLLERR | POLLHUP); |
e4b356b5 ACM |
430 | /* |
431 | * Save the idx so that when we filter out fds POLLHUP'ed we can | |
432 | * close the associated evlist->mmap[] entry. | |
433 | */ | |
434 | if (pos >= 0) { | |
40cb2d51 | 435 | evlist->core.pollfd.priv[pos].ptr = map; |
e4b356b5 ACM |
436 | |
437 | fcntl(fd, F_SETFL, O_NONBLOCK); | |
438 | } | |
439 | ||
440 | return pos; | |
441 | } | |
442 | ||
63503dba | 443 | int perf_evlist__add_pollfd(struct evlist *evlist, int fd) |
70082dd9 | 444 | { |
4876075b | 445 | return __perf_evlist__add_pollfd(evlist, fd, NULL, POLLIN); |
e4b356b5 ACM |
446 | } |
447 | ||
258e4bfc WN |
448 | static void perf_evlist__munmap_filtered(struct fdarray *fda, int fd, |
449 | void *arg __maybe_unused) | |
e4b356b5 | 450 | { |
a5830532 | 451 | struct mmap *map = fda->priv[fd].ptr; |
1b85337d | 452 | |
4876075b WN |
453 | if (map) |
454 | perf_mmap__put(map); | |
70082dd9 | 455 | } |
70db7533 | 456 | |
63503dba | 457 | int perf_evlist__filter_pollfd(struct evlist *evlist, short revents_and_mask) |
1ddec7f0 | 458 | { |
40cb2d51 | 459 | return fdarray__filter(&evlist->core.pollfd, revents_and_mask, |
258e4bfc | 460 | perf_evlist__munmap_filtered, NULL); |
1ddec7f0 ACM |
461 | } |
462 | ||
63503dba | 463 | int perf_evlist__poll(struct evlist *evlist, int timeout) |
f66a889d | 464 | { |
40cb2d51 | 465 | return fdarray__poll(&evlist->core.pollfd, timeout); |
f66a889d ACM |
466 | } |
467 | ||
63503dba | 468 | static void perf_evlist__id_hash(struct evlist *evlist, |
32dcd021 | 469 | struct evsel *evsel, |
a91e5431 | 470 | int cpu, int thread, u64 id) |
3d3b5e95 ACM |
471 | { |
472 | int hash; | |
473 | struct perf_sample_id *sid = SID(evsel, cpu, thread); | |
474 | ||
475 | sid->id = id; | |
476 | sid->evsel = evsel; | |
477 | hash = hash_64(sid->id, PERF_EVLIST__HLIST_BITS); | |
478 | hlist_add_head(&sid->node, &evlist->heads[hash]); | |
479 | } | |
480 | ||
63503dba | 481 | void perf_evlist__id_add(struct evlist *evlist, struct evsel *evsel, |
a91e5431 ACM |
482 | int cpu, int thread, u64 id) |
483 | { | |
484 | perf_evlist__id_hash(evlist, evsel, cpu, thread, id); | |
485 | evsel->id[evsel->ids++] = id; | |
486 | } | |
487 | ||
63503dba | 488 | int perf_evlist__id_add_fd(struct evlist *evlist, |
32dcd021 | 489 | struct evsel *evsel, |
1c59612d | 490 | int cpu, int thread, int fd) |
f8a95309 | 491 | { |
f8a95309 | 492 | u64 read_data[4] = { 0, }; |
3d3b5e95 | 493 | int id_idx = 1; /* The first entry is the counter value */ |
e2b5abe0 JO |
494 | u64 id; |
495 | int ret; | |
496 | ||
497 | ret = ioctl(fd, PERF_EVENT_IOC_ID, &id); | |
498 | if (!ret) | |
499 | goto add; | |
500 | ||
501 | if (errno != ENOTTY) | |
502 | return -1; | |
503 | ||
504 | /* Legacy way to get event id.. All hail to old kernels! */ | |
f8a95309 | 505 | |
c4861afe JO |
506 | /* |
507 | * This way does not work with group format read, so bail | |
508 | * out in that case. | |
509 | */ | |
510 | if (perf_evlist__read_format(evlist) & PERF_FORMAT_GROUP) | |
511 | return -1; | |
512 | ||
1fc632ce | 513 | if (!(evsel->core.attr.read_format & PERF_FORMAT_ID) || |
f8a95309 ACM |
514 | read(fd, &read_data, sizeof(read_data)) == -1) |
515 | return -1; | |
516 | ||
1fc632ce | 517 | if (evsel->core.attr.read_format & PERF_FORMAT_TOTAL_TIME_ENABLED) |
f8a95309 | 518 | ++id_idx; |
1fc632ce | 519 | if (evsel->core.attr.read_format & PERF_FORMAT_TOTAL_TIME_RUNNING) |
f8a95309 ACM |
520 | ++id_idx; |
521 | ||
e2b5abe0 JO |
522 | id = read_data[id_idx]; |
523 | ||
524 | add: | |
525 | perf_evlist__id_add(evlist, evsel, cpu, thread, id); | |
f8a95309 ACM |
526 | return 0; |
527 | } | |
528 | ||
63503dba | 529 | static void perf_evlist__set_sid_idx(struct evlist *evlist, |
32dcd021 | 530 | struct evsel *evsel, int idx, int cpu, |
3c659eed AH |
531 | int thread) |
532 | { | |
533 | struct perf_sample_id *sid = SID(evsel, cpu, thread); | |
534 | sid->idx = idx; | |
f72f901d JO |
535 | if (evlist->core.cpus && cpu >= 0) |
536 | sid->cpu = evlist->core.cpus->map[cpu]; | |
3c659eed AH |
537 | else |
538 | sid->cpu = -1; | |
648b5af3 | 539 | if (!evsel->core.system_wide && evlist->core.threads && thread >= 0) |
a2f354e3 | 540 | sid->tid = perf_thread_map__pid(evlist->core.threads, thread); |
3c659eed AH |
541 | else |
542 | sid->tid = -1; | |
543 | } | |
544 | ||
63503dba | 545 | struct perf_sample_id *perf_evlist__id2sid(struct evlist *evlist, u64 id) |
70db7533 ACM |
546 | { |
547 | struct hlist_head *head; | |
70db7533 ACM |
548 | struct perf_sample_id *sid; |
549 | int hash; | |
550 | ||
70db7533 ACM |
551 | hash = hash_64(id, PERF_EVLIST__HLIST_BITS); |
552 | head = &evlist->heads[hash]; | |
553 | ||
b67bfe0d | 554 | hlist_for_each_entry(sid, head, node) |
70db7533 | 555 | if (sid->id == id) |
932a3594 JO |
556 | return sid; |
557 | ||
558 | return NULL; | |
559 | } | |
560 | ||
63503dba | 561 | struct evsel *perf_evlist__id2evsel(struct evlist *evlist, u64 id) |
932a3594 JO |
562 | { |
563 | struct perf_sample_id *sid; | |
564 | ||
6484d2f9 | 565 | if (evlist->core.nr_entries == 1 || !id) |
932a3594 JO |
566 | return perf_evlist__first(evlist); |
567 | ||
568 | sid = perf_evlist__id2sid(evlist, id); | |
569 | if (sid) | |
570 | return sid->evsel; | |
30e68bcc NK |
571 | |
572 | if (!perf_evlist__sample_id_all(evlist)) | |
0c21f736 | 573 | return perf_evlist__first(evlist); |
30e68bcc | 574 | |
70db7533 ACM |
575 | return NULL; |
576 | } | |
04391deb | 577 | |
63503dba | 578 | struct evsel *perf_evlist__id2evsel_strict(struct evlist *evlist, |
dddcf6ab AH |
579 | u64 id) |
580 | { | |
581 | struct perf_sample_id *sid; | |
582 | ||
583 | if (!id) | |
584 | return NULL; | |
585 | ||
586 | sid = perf_evlist__id2sid(evlist, id); | |
587 | if (sid) | |
588 | return sid->evsel; | |
589 | ||
590 | return NULL; | |
591 | } | |
592 | ||
63503dba | 593 | static int perf_evlist__event2id(struct evlist *evlist, |
75562573 AH |
594 | union perf_event *event, u64 *id) |
595 | { | |
b1fcd190 | 596 | const __u64 *array = event->sample.array; |
75562573 AH |
597 | ssize_t n; |
598 | ||
599 | n = (event->header.size - sizeof(event->header)) >> 3; | |
600 | ||
601 | if (event->header.type == PERF_RECORD_SAMPLE) { | |
602 | if (evlist->id_pos >= n) | |
603 | return -1; | |
604 | *id = array[evlist->id_pos]; | |
605 | } else { | |
606 | if (evlist->is_pos > n) | |
607 | return -1; | |
608 | n -= evlist->is_pos; | |
609 | *id = array[n]; | |
610 | } | |
611 | return 0; | |
612 | } | |
613 | ||
63503dba | 614 | struct evsel *perf_evlist__event2evsel(struct evlist *evlist, |
7cb5c5ac | 615 | union perf_event *event) |
75562573 | 616 | { |
32dcd021 | 617 | struct evsel *first = perf_evlist__first(evlist); |
75562573 AH |
618 | struct hlist_head *head; |
619 | struct perf_sample_id *sid; | |
620 | int hash; | |
621 | u64 id; | |
622 | ||
6484d2f9 | 623 | if (evlist->core.nr_entries == 1) |
98be6966 AH |
624 | return first; |
625 | ||
1fc632ce | 626 | if (!first->core.attr.sample_id_all && |
98be6966 AH |
627 | event->header.type != PERF_RECORD_SAMPLE) |
628 | return first; | |
75562573 AH |
629 | |
630 | if (perf_evlist__event2id(evlist, event, &id)) | |
631 | return NULL; | |
632 | ||
633 | /* Synthesized events have an id of zero */ | |
634 | if (!id) | |
98be6966 | 635 | return first; |
75562573 AH |
636 | |
637 | hash = hash_64(id, PERF_EVLIST__HLIST_BITS); | |
638 | head = &evlist->heads[hash]; | |
639 | ||
640 | hlist_for_each_entry(sid, head, node) { | |
641 | if (sid->id == id) | |
642 | return sid->evsel; | |
643 | } | |
644 | return NULL; | |
645 | } | |
646 | ||
63503dba | 647 | static int perf_evlist__set_paused(struct evlist *evlist, bool value) |
65aea233 WN |
648 | { |
649 | int i; | |
650 | ||
0b72d69a | 651 | if (!evlist->overwrite_mmap) |
078c3386 WN |
652 | return 0; |
653 | ||
c976ee11 | 654 | for (i = 0; i < evlist->core.nr_mmaps; i++) { |
2cf07b29 | 655 | int fd = evlist->overwrite_mmap[i].core.fd; |
65aea233 WN |
656 | int err; |
657 | ||
658 | if (fd < 0) | |
659 | continue; | |
660 | err = ioctl(fd, PERF_EVENT_IOC_PAUSE_OUTPUT, value ? 1 : 0); | |
661 | if (err) | |
662 | return err; | |
663 | } | |
664 | return 0; | |
665 | } | |
666 | ||
63503dba | 667 | static int perf_evlist__pause(struct evlist *evlist) |
65aea233 WN |
668 | { |
669 | return perf_evlist__set_paused(evlist, true); | |
670 | } | |
671 | ||
63503dba | 672 | static int perf_evlist__resume(struct evlist *evlist) |
65aea233 WN |
673 | { |
674 | return perf_evlist__set_paused(evlist, false); | |
675 | } | |
676 | ||
db6b7b13 | 677 | static void evlist__munmap_nofree(struct evlist *evlist) |
f8a95309 | 678 | { |
aece948f | 679 | int i; |
f8a95309 | 680 | |
b2cb615d | 681 | if (evlist->mmap) |
c976ee11 | 682 | for (i = 0; i < evlist->core.nr_mmaps; i++) |
b2cb615d | 683 | perf_mmap__munmap(&evlist->mmap[i]); |
983874d1 | 684 | |
0b72d69a | 685 | if (evlist->overwrite_mmap) |
c976ee11 | 686 | for (i = 0; i < evlist->core.nr_mmaps; i++) |
0b72d69a | 687 | perf_mmap__munmap(&evlist->overwrite_mmap[i]); |
a1f72618 | 688 | } |
aece948f | 689 | |
db6b7b13 | 690 | void evlist__munmap(struct evlist *evlist) |
a1f72618 | 691 | { |
db6b7b13 | 692 | evlist__munmap_nofree(evlist); |
04662523 | 693 | zfree(&evlist->mmap); |
0b72d69a | 694 | zfree(&evlist->overwrite_mmap); |
f8a95309 ACM |
695 | } |
696 | ||
d50cf361 JO |
697 | static struct mmap *evlist__alloc_mmap(struct evlist *evlist, |
698 | bool overwrite) | |
f8a95309 | 699 | { |
d4c6fb36 | 700 | int i; |
a5830532 | 701 | struct mmap *map; |
d4c6fb36 | 702 | |
c976ee11 | 703 | evlist->core.nr_mmaps = perf_cpu_map__nr(evlist->core.cpus); |
315c0a1f | 704 | if (perf_cpu_map__empty(evlist->core.cpus)) |
c976ee11 JO |
705 | evlist->core.nr_mmaps = perf_thread_map__nr(evlist->core.threads); |
706 | map = zalloc(evlist->core.nr_mmaps * sizeof(struct mmap)); | |
8db6d6b1 WN |
707 | if (!map) |
708 | return NULL; | |
946ae1d4 | 709 | |
c976ee11 | 710 | for (i = 0; i < evlist->core.nr_mmaps; i++) { |
2cf07b29 | 711 | map[i].core.fd = -1; |
8df7a869 | 712 | map[i].core.overwrite = overwrite; |
4738ca30 ACM |
713 | /* |
714 | * When the perf_mmap() call is made we grab one refcount, plus | |
6afad54d | 715 | * one extra to let perf_mmap__consume() get the last |
4738ca30 ACM |
716 | * events after all real references (perf_mmap__get()) are |
717 | * dropped. | |
718 | * | |
719 | * Each PERF_EVENT_IOC_SET_OUTPUT points to this mmap and | |
720 | * thus does perf_mmap__get() on it. | |
721 | */ | |
e03edfea | 722 | refcount_set(&map[i].core.refcnt, 0); |
4738ca30 | 723 | } |
8db6d6b1 | 724 | return map; |
f8a95309 ACM |
725 | } |
726 | ||
f3058a1c | 727 | static bool |
63503dba | 728 | perf_evlist__should_poll(struct evlist *evlist __maybe_unused, |
32dcd021 | 729 | struct evsel *evsel) |
f3058a1c | 730 | { |
1fc632ce | 731 | if (evsel->core.attr.write_backward) |
f3058a1c WN |
732 | return false; |
733 | return true; | |
734 | } | |
735 | ||
9521b5f2 | 736 | static int evlist__mmap_per_evsel(struct evlist *evlist, int idx, |
9f21b815 | 737 | struct mmap_params *mp, int cpu_idx, |
0b72d69a | 738 | int thread, int *_output, int *_output_overwrite) |
aece948f | 739 | { |
32dcd021 | 740 | struct evsel *evsel; |
f3058a1c | 741 | int revent; |
f72f901d | 742 | int evlist_cpu = cpu_map__cpu(evlist->core.cpus, cpu_idx); |
04e21314 | 743 | |
e5cadb93 | 744 | evlist__for_each_entry(evlist, evsel) { |
a5830532 | 745 | struct mmap *maps = evlist->mmap; |
078c3386 | 746 | int *output = _output; |
bf8e8f4b | 747 | int fd; |
9f21b815 | 748 | int cpu; |
bf8e8f4b | 749 | |
71f566a3 | 750 | mp->prot = PROT_READ | PROT_WRITE; |
1fc632ce | 751 | if (evsel->core.attr.write_backward) { |
0b72d69a WN |
752 | output = _output_overwrite; |
753 | maps = evlist->overwrite_mmap; | |
078c3386 WN |
754 | |
755 | if (!maps) { | |
d50cf361 | 756 | maps = evlist__alloc_mmap(evlist, true); |
078c3386 WN |
757 | if (!maps) |
758 | return -1; | |
0b72d69a | 759 | evlist->overwrite_mmap = maps; |
54cc54de WN |
760 | if (evlist->bkw_mmap_state == BKW_MMAP_NOTREADY) |
761 | perf_evlist__toggle_bkw_mmap(evlist, BKW_MMAP_RUNNING); | |
078c3386 | 762 | } |
71f566a3 | 763 | mp->prot &= ~PROT_WRITE; |
078c3386 | 764 | } |
f3058a1c | 765 | |
648b5af3 | 766 | if (evsel->core.system_wide && thread) |
bf8e8f4b AH |
767 | continue; |
768 | ||
b4df75de | 769 | cpu = perf_cpu_map__idx(evsel->core.cpus, evlist_cpu); |
9f21b815 MR |
770 | if (cpu == -1) |
771 | continue; | |
772 | ||
bf8e8f4b | 773 | fd = FD(evsel, cpu, thread); |
04e21314 AH |
774 | |
775 | if (*output == -1) { | |
776 | *output = fd; | |
078c3386 | 777 | |
31fb4c0d | 778 | if (perf_mmap__mmap(&maps[idx], mp, *output, evlist_cpu) < 0) |
04e21314 AH |
779 | return -1; |
780 | } else { | |
781 | if (ioctl(fd, PERF_EVENT_IOC_SET_OUTPUT, *output) != 0) | |
782 | return -1; | |
82396986 | 783 | |
078c3386 | 784 | perf_mmap__get(&maps[idx]); |
04e21314 AH |
785 | } |
786 | ||
f3058a1c WN |
787 | revent = perf_evlist__should_poll(evlist, evsel) ? POLLIN : 0; |
788 | ||
f90d194a AH |
789 | /* |
790 | * The system_wide flag causes a selected event to be opened | |
791 | * always without a pid. Consequently it will never get a | |
792 | * POLLHUP, but it is used for tracking in combination with | |
793 | * other events, so it should not need to be polled anyway. | |
794 | * Therefore don't add it for polling. | |
795 | */ | |
648b5af3 | 796 | if (!evsel->core.system_wide && |
078c3386 WN |
797 | __perf_evlist__add_pollfd(evlist, fd, &maps[idx], revent) < 0) { |
798 | perf_mmap__put(&maps[idx]); | |
ad6765dd | 799 | return -1; |
82396986 | 800 | } |
033fa713 | 801 | |
1fc632ce | 802 | if (evsel->core.attr.read_format & PERF_FORMAT_ID) { |
3c659eed AH |
803 | if (perf_evlist__id_add_fd(evlist, evsel, cpu, thread, |
804 | fd) < 0) | |
805 | return -1; | |
806 | perf_evlist__set_sid_idx(evlist, evsel, idx, cpu, | |
807 | thread); | |
808 | } | |
04e21314 AH |
809 | } |
810 | ||
811 | return 0; | |
812 | } | |
813 | ||
9521b5f2 | 814 | static int evlist__mmap_per_cpu(struct evlist *evlist, |
a8a8f3eb | 815 | struct mmap_params *mp) |
04e21314 | 816 | { |
aece948f | 817 | int cpu, thread; |
6549cd8f | 818 | int nr_cpus = perf_cpu_map__nr(evlist->core.cpus); |
a2f354e3 | 819 | int nr_threads = perf_thread_map__nr(evlist->core.threads); |
aece948f | 820 | |
e3e1a54f | 821 | pr_debug2("perf event ring buffer mmapped per cpu\n"); |
b3a319d5 | 822 | for (cpu = 0; cpu < nr_cpus; cpu++) { |
aece948f | 823 | int output = -1; |
0b72d69a | 824 | int output_overwrite = -1; |
aece948f | 825 | |
718c602d AH |
826 | auxtrace_mmap_params__set_idx(&mp->auxtrace_mp, evlist, cpu, |
827 | true); | |
828 | ||
b3a319d5 | 829 | for (thread = 0; thread < nr_threads; thread++) { |
9521b5f2 | 830 | if (evlist__mmap_per_evsel(evlist, cpu, mp, cpu, |
0b72d69a | 831 | thread, &output, &output_overwrite)) |
04e21314 | 832 | goto out_unmap; |
aece948f ACM |
833 | } |
834 | } | |
835 | ||
836 | return 0; | |
837 | ||
838 | out_unmap: | |
db6b7b13 | 839 | evlist__munmap_nofree(evlist); |
aece948f ACM |
840 | return -1; |
841 | } | |
842 | ||
9521b5f2 | 843 | static int evlist__mmap_per_thread(struct evlist *evlist, |
a8a8f3eb | 844 | struct mmap_params *mp) |
aece948f | 845 | { |
aece948f | 846 | int thread; |
a2f354e3 | 847 | int nr_threads = perf_thread_map__nr(evlist->core.threads); |
aece948f | 848 | |
e3e1a54f | 849 | pr_debug2("perf event ring buffer mmapped per thread\n"); |
b3a319d5 | 850 | for (thread = 0; thread < nr_threads; thread++) { |
aece948f | 851 | int output = -1; |
0b72d69a | 852 | int output_overwrite = -1; |
aece948f | 853 | |
718c602d AH |
854 | auxtrace_mmap_params__set_idx(&mp->auxtrace_mp, evlist, thread, |
855 | false); | |
856 | ||
9521b5f2 | 857 | if (evlist__mmap_per_evsel(evlist, thread, mp, 0, thread, |
0b72d69a | 858 | &output, &output_overwrite)) |
04e21314 | 859 | goto out_unmap; |
aece948f ACM |
860 | } |
861 | ||
862 | return 0; | |
863 | ||
864 | out_unmap: | |
db6b7b13 | 865 | evlist__munmap_nofree(evlist); |
aece948f ACM |
866 | return -1; |
867 | } | |
868 | ||
f5e7150c | 869 | unsigned long perf_event_mlock_kb_in_pages(void) |
994a1f78 | 870 | { |
f5e7150c ACM |
871 | unsigned long pages; |
872 | int max; | |
8185e881 | 873 | |
f5e7150c ACM |
874 | if (sysctl__read_int("kernel/perf_event_mlock_kb", &max) < 0) { |
875 | /* | |
876 | * Pick a once upon a time good value, i.e. things look | |
877 | * strange since we can't read a sysctl value, but lets not | |
878 | * die yet... | |
879 | */ | |
880 | max = 512; | |
881 | } else { | |
882 | max -= (page_size / 1024); | |
883 | } | |
8185e881 | 884 | |
f5e7150c ACM |
885 | pages = (max * 1024) / page_size; |
886 | if (!is_power_of_2(pages)) | |
887 | pages = rounddown_pow_of_two(pages); | |
888 | ||
889 | return pages; | |
890 | } | |
891 | ||
9521b5f2 | 892 | size_t evlist__mmap_size(unsigned long pages) |
f5e7150c ACM |
893 | { |
894 | if (pages == UINT_MAX) | |
895 | pages = perf_event_mlock_kb_in_pages(); | |
896 | else if (!is_power_of_2(pages)) | |
994a1f78 JO |
897 | return 0; |
898 | ||
899 | return (pages + 1) * page_size; | |
900 | } | |
901 | ||
33c2dcfd DA |
902 | static long parse_pages_arg(const char *str, unsigned long min, |
903 | unsigned long max) | |
994a1f78 | 904 | { |
2fbe4abe | 905 | unsigned long pages, val; |
27050f53 JO |
906 | static struct parse_tag tags[] = { |
907 | { .tag = 'B', .mult = 1 }, | |
908 | { .tag = 'K', .mult = 1 << 10 }, | |
909 | { .tag = 'M', .mult = 1 << 20 }, | |
910 | { .tag = 'G', .mult = 1 << 30 }, | |
911 | { .tag = 0 }, | |
912 | }; | |
994a1f78 | 913 | |
8973504b | 914 | if (str == NULL) |
33c2dcfd | 915 | return -EINVAL; |
8973504b | 916 | |
27050f53 | 917 | val = parse_tag_value(str, tags); |
2fbe4abe | 918 | if (val != (unsigned long) -1) { |
27050f53 JO |
919 | /* we got file size value */ |
920 | pages = PERF_ALIGN(val, page_size) / page_size; | |
27050f53 JO |
921 | } else { |
922 | /* we got pages count value */ | |
923 | char *eptr; | |
924 | pages = strtoul(str, &eptr, 10); | |
33c2dcfd DA |
925 | if (*eptr != '\0') |
926 | return -EINVAL; | |
994a1f78 JO |
927 | } |
928 | ||
2bcab6c1 | 929 | if (pages == 0 && min == 0) { |
33c2dcfd | 930 | /* leave number of pages at 0 */ |
1dbfa938 | 931 | } else if (!is_power_of_2(pages)) { |
9808143b JO |
932 | char buf[100]; |
933 | ||
33c2dcfd | 934 | /* round pages up to next power of 2 */ |
91529834 | 935 | pages = roundup_pow_of_two(pages); |
1dbfa938 AH |
936 | if (!pages) |
937 | return -EINVAL; | |
9808143b JO |
938 | |
939 | unit_number__scnprintf(buf, sizeof(buf), pages * page_size); | |
940 | pr_info("rounding mmap pages size to %s (%lu pages)\n", | |
941 | buf, pages); | |
2fbe4abe AH |
942 | } |
943 | ||
33c2dcfd DA |
944 | if (pages > max) |
945 | return -EINVAL; | |
946 | ||
947 | return pages; | |
948 | } | |
949 | ||
e9db1310 | 950 | int __perf_evlist__parse_mmap_pages(unsigned int *mmap_pages, const char *str) |
33c2dcfd | 951 | { |
33c2dcfd DA |
952 | unsigned long max = UINT_MAX; |
953 | long pages; | |
954 | ||
f5ae9c42 | 955 | if (max > SIZE_MAX / page_size) |
33c2dcfd DA |
956 | max = SIZE_MAX / page_size; |
957 | ||
958 | pages = parse_pages_arg(str, 1, max); | |
959 | if (pages < 0) { | |
960 | pr_err("Invalid argument for --mmap_pages/-m\n"); | |
994a1f78 JO |
961 | return -1; |
962 | } | |
963 | ||
964 | *mmap_pages = pages; | |
965 | return 0; | |
966 | } | |
967 | ||
e9db1310 AH |
968 | int perf_evlist__parse_mmap_pages(const struct option *opt, const char *str, |
969 | int unset __maybe_unused) | |
970 | { | |
971 | return __perf_evlist__parse_mmap_pages(opt->value, str); | |
972 | } | |
973 | ||
c83fa7f2 | 974 | /** |
9521b5f2 | 975 | * evlist__mmap_ex - Create mmaps to receive events. |
c83fa7f2 AH |
976 | * @evlist: list of events |
977 | * @pages: map length in pages | |
978 | * @overwrite: overwrite older events? | |
718c602d AH |
979 | * @auxtrace_pages - auxtrace map length in pages |
980 | * @auxtrace_overwrite - overwrite older auxtrace data? | |
f8a95309 | 981 | * |
c83fa7f2 | 982 | * If @overwrite is %false the user needs to signal event consumption using |
9521b5f2 | 983 | * perf_mmap__write_tail(). Using evlist__mmap_read() does this |
c83fa7f2 | 984 | * automatically. |
7e2ed097 | 985 | * |
718c602d AH |
986 | * Similarly, if @auxtrace_overwrite is %false the user needs to signal data |
987 | * consumption using auxtrace_mmap__write_tail(). | |
988 | * | |
c83fa7f2 | 989 | * Return: %0 on success, negative error code otherwise. |
f8a95309 | 990 | */ |
9521b5f2 | 991 | int evlist__mmap_ex(struct evlist *evlist, unsigned int pages, |
7a276ff6 | 992 | unsigned int auxtrace_pages, |
51255a8a AB |
993 | bool auxtrace_overwrite, int nr_cblocks, int affinity, int flush, |
994 | int comp_level) | |
f8a95309 | 995 | { |
32dcd021 | 996 | struct evsel *evsel; |
f72f901d | 997 | const struct perf_cpu_map *cpus = evlist->core.cpus; |
03617c22 | 998 | const struct perf_thread_map *threads = evlist->core.threads; |
71f566a3 WN |
999 | /* |
1000 | * Delay setting mp.prot: set it before calling perf_mmap__mmap. | |
1001 | * Its value is decided by evsel's write_backward. | |
1002 | * So &mp should not be passed through const pointer. | |
1003 | */ | |
51255a8a AB |
1004 | struct mmap_params mp = { .nr_cblocks = nr_cblocks, .affinity = affinity, .flush = flush, |
1005 | .comp_level = comp_level }; | |
50a682ce | 1006 | |
8db6d6b1 | 1007 | if (!evlist->mmap) |
d50cf361 | 1008 | evlist->mmap = evlist__alloc_mmap(evlist, false); |
8db6d6b1 | 1009 | if (!evlist->mmap) |
f8a95309 ACM |
1010 | return -ENOMEM; |
1011 | ||
40cb2d51 | 1012 | if (evlist->core.pollfd.entries == NULL && perf_evlist__alloc_pollfd(evlist) < 0) |
f8a95309 ACM |
1013 | return -ENOMEM; |
1014 | ||
f6fa4375 JO |
1015 | evlist->core.mmap_len = evlist__mmap_size(pages); |
1016 | pr_debug("mmap size %zuB\n", evlist->core.mmap_len); | |
1017 | mp.mask = evlist->core.mmap_len - page_size - 1; | |
f8a95309 | 1018 | |
f6fa4375 | 1019 | auxtrace_mmap_params__init(&mp.auxtrace_mp, evlist->core.mmap_len, |
718c602d AH |
1020 | auxtrace_pages, auxtrace_overwrite); |
1021 | ||
e5cadb93 | 1022 | evlist__for_each_entry(evlist, evsel) { |
1fc632ce | 1023 | if ((evsel->core.attr.read_format & PERF_FORMAT_ID) && |
a91e5431 | 1024 | evsel->sample_id == NULL && |
6549cd8f | 1025 | perf_evsel__alloc_id(evsel, perf_cpu_map__nr(cpus), threads->nr) < 0) |
f8a95309 | 1026 | return -ENOMEM; |
f8a95309 ACM |
1027 | } |
1028 | ||
315c0a1f | 1029 | if (perf_cpu_map__empty(cpus)) |
9521b5f2 | 1030 | return evlist__mmap_per_thread(evlist, &mp); |
f8a95309 | 1031 | |
9521b5f2 | 1032 | return evlist__mmap_per_cpu(evlist, &mp); |
f8a95309 | 1033 | } |
7e2ed097 | 1034 | |
9521b5f2 | 1035 | int evlist__mmap(struct evlist *evlist, unsigned int pages) |
718c602d | 1036 | { |
9521b5f2 | 1037 | return evlist__mmap_ex(evlist, pages, 0, false, 0, PERF_AFFINITY_SYS, 1, 0); |
718c602d AH |
1038 | } |
1039 | ||
63503dba | 1040 | int perf_evlist__create_maps(struct evlist *evlist, struct target *target) |
7e2ed097 | 1041 | { |
147c508f | 1042 | bool all_threads = (target->per_thread && target->system_wide); |
f854839b | 1043 | struct perf_cpu_map *cpus; |
9749b90e | 1044 | struct perf_thread_map *threads; |
7e2ed097 | 1045 | |
147c508f JY |
1046 | /* |
1047 | * If specify '-a' and '--per-thread' to perf record, perf record | |
1048 | * will override '--per-thread'. target->per_thread = false and | |
1049 | * target->system_wide = true. | |
1050 | * | |
1051 | * If specify '--per-thread' only to perf record, | |
1052 | * target->per_thread = true and target->system_wide = false. | |
1053 | * | |
1054 | * So target->per_thread && target->system_wide is false. | |
1055 | * For perf record, thread_map__new_str doesn't call | |
1056 | * thread_map__new_all_cpus. That will keep perf record's | |
1057 | * current behavior. | |
1058 | * | |
1059 | * For perf stat, it allows the case that target->per_thread and | |
1060 | * target->system_wide are all true. It means to collect system-wide | |
1061 | * per-thread data. thread_map__new_str will call | |
1062 | * thread_map__new_all_cpus to enumerate all threads. | |
1063 | */ | |
73c0ca1e | 1064 | threads = thread_map__new_str(target->pid, target->tid, target->uid, |
147c508f | 1065 | all_threads); |
7e2ed097 | 1066 | |
74bfd2b2 | 1067 | if (!threads) |
7e2ed097 ACM |
1068 | return -1; |
1069 | ||
9c105fbc | 1070 | if (target__uses_dummy_map(target)) |
397721e0 | 1071 | cpus = perf_cpu_map__dummy_new(); |
879d77d0 | 1072 | else |
9c3516d1 | 1073 | cpus = perf_cpu_map__new(target->cpu_list); |
7e2ed097 | 1074 | |
74bfd2b2 | 1075 | if (!cpus) |
7e2ed097 ACM |
1076 | goto out_delete_threads; |
1077 | ||
ec903f26 | 1078 | evlist->core.has_user_cpus = !!target->cpu_list; |
ec9a77a7 | 1079 | |
453fa030 | 1080 | perf_evlist__set_maps(&evlist->core, cpus, threads); |
d5bc056e AH |
1081 | |
1082 | return 0; | |
7e2ed097 ACM |
1083 | |
1084 | out_delete_threads: | |
7836e52e | 1085 | perf_thread_map__put(threads); |
7e2ed097 ACM |
1086 | return -1; |
1087 | } | |
1088 | ||
63503dba | 1089 | void __perf_evlist__set_sample_bit(struct evlist *evlist, |
22c8a376 ACM |
1090 | enum perf_event_sample_format bit) |
1091 | { | |
32dcd021 | 1092 | struct evsel *evsel; |
22c8a376 | 1093 | |
e5cadb93 | 1094 | evlist__for_each_entry(evlist, evsel) |
22c8a376 ACM |
1095 | __perf_evsel__set_sample_bit(evsel, bit); |
1096 | } | |
1097 | ||
63503dba | 1098 | void __perf_evlist__reset_sample_bit(struct evlist *evlist, |
22c8a376 ACM |
1099 | enum perf_event_sample_format bit) |
1100 | { | |
32dcd021 | 1101 | struct evsel *evsel; |
22c8a376 | 1102 | |
e5cadb93 | 1103 | evlist__for_each_entry(evlist, evsel) |
22c8a376 ACM |
1104 | __perf_evsel__reset_sample_bit(evsel, bit); |
1105 | } | |
1106 | ||
63503dba | 1107 | int perf_evlist__apply_filters(struct evlist *evlist, struct evsel **err_evsel) |
0a102479 | 1108 | { |
32dcd021 | 1109 | struct evsel *evsel; |
745cefc5 | 1110 | int err = 0; |
0a102479 | 1111 | |
e5cadb93 | 1112 | evlist__for_each_entry(evlist, evsel) { |
745cefc5 | 1113 | if (evsel->filter == NULL) |
0a102479 | 1114 | continue; |
745cefc5 | 1115 | |
d988d5ee KL |
1116 | /* |
1117 | * filters only work for tracepoint event, which doesn't have cpu limit. | |
1118 | * So evlist and evsel should always be same. | |
1119 | */ | |
a00571fd | 1120 | err = perf_evsel__apply_filter(&evsel->core, evsel->filter); |
23d4aad4 ACM |
1121 | if (err) { |
1122 | *err_evsel = evsel; | |
745cefc5 | 1123 | break; |
23d4aad4 | 1124 | } |
0a102479 FW |
1125 | } |
1126 | ||
745cefc5 ACM |
1127 | return err; |
1128 | } | |
1129 | ||
63503dba | 1130 | int perf_evlist__set_tp_filter(struct evlist *evlist, const char *filter) |
745cefc5 | 1131 | { |
32dcd021 | 1132 | struct evsel *evsel; |
745cefc5 | 1133 | int err = 0; |
745cefc5 | 1134 | |
e5cadb93 | 1135 | evlist__for_each_entry(evlist, evsel) { |
1fc632ce | 1136 | if (evsel->core.attr.type != PERF_TYPE_TRACEPOINT) |
fdf14720 WN |
1137 | continue; |
1138 | ||
94ad89bc | 1139 | err = perf_evsel__set_filter(evsel, filter); |
745cefc5 ACM |
1140 | if (err) |
1141 | break; | |
1142 | } | |
1143 | ||
1144 | return err; | |
0a102479 | 1145 | } |
74429964 | 1146 | |
63503dba | 1147 | int perf_evlist__set_tp_filter_pids(struct evlist *evlist, size_t npids, pid_t *pids) |
cfd70a26 ACM |
1148 | { |
1149 | char *filter; | |
be199ada ACM |
1150 | int ret = -1; |
1151 | size_t i; | |
cfd70a26 | 1152 | |
be199ada ACM |
1153 | for (i = 0; i < npids; ++i) { |
1154 | if (i == 0) { | |
1155 | if (asprintf(&filter, "common_pid != %d", pids[i]) < 0) | |
1156 | return -1; | |
1157 | } else { | |
1158 | char *tmp; | |
1159 | ||
1160 | if (asprintf(&tmp, "%s && common_pid != %d", filter, pids[i]) < 0) | |
1161 | goto out_free; | |
1162 | ||
1163 | free(filter); | |
1164 | filter = tmp; | |
1165 | } | |
1166 | } | |
cfd70a26 | 1167 | |
7ad92a33 | 1168 | ret = perf_evlist__set_tp_filter(evlist, filter); |
be199ada | 1169 | out_free: |
cfd70a26 ACM |
1170 | free(filter); |
1171 | return ret; | |
1172 | } | |
1173 | ||
63503dba | 1174 | int perf_evlist__set_tp_filter_pid(struct evlist *evlist, pid_t pid) |
be199ada | 1175 | { |
7ad92a33 | 1176 | return perf_evlist__set_tp_filter_pids(evlist, 1, &pid); |
be199ada ACM |
1177 | } |
1178 | ||
63503dba | 1179 | bool perf_evlist__valid_sample_type(struct evlist *evlist) |
74429964 | 1180 | { |
32dcd021 | 1181 | struct evsel *pos; |
c2a70653 | 1182 | |
6484d2f9 | 1183 | if (evlist->core.nr_entries == 1) |
75562573 AH |
1184 | return true; |
1185 | ||
1186 | if (evlist->id_pos < 0 || evlist->is_pos < 0) | |
1187 | return false; | |
1188 | ||
e5cadb93 | 1189 | evlist__for_each_entry(evlist, pos) { |
75562573 AH |
1190 | if (pos->id_pos != evlist->id_pos || |
1191 | pos->is_pos != evlist->is_pos) | |
c2a70653 | 1192 | return false; |
74429964 FW |
1193 | } |
1194 | ||
c2a70653 | 1195 | return true; |
74429964 FW |
1196 | } |
1197 | ||
63503dba | 1198 | u64 __perf_evlist__combined_sample_type(struct evlist *evlist) |
c2a70653 | 1199 | { |
32dcd021 | 1200 | struct evsel *evsel; |
75562573 AH |
1201 | |
1202 | if (evlist->combined_sample_type) | |
1203 | return evlist->combined_sample_type; | |
1204 | ||
e5cadb93 | 1205 | evlist__for_each_entry(evlist, evsel) |
1fc632ce | 1206 | evlist->combined_sample_type |= evsel->core.attr.sample_type; |
75562573 AH |
1207 | |
1208 | return evlist->combined_sample_type; | |
1209 | } | |
1210 | ||
63503dba | 1211 | u64 perf_evlist__combined_sample_type(struct evlist *evlist) |
75562573 AH |
1212 | { |
1213 | evlist->combined_sample_type = 0; | |
1214 | return __perf_evlist__combined_sample_type(evlist); | |
c2a70653 ACM |
1215 | } |
1216 | ||
63503dba | 1217 | u64 perf_evlist__combined_branch_type(struct evlist *evlist) |
98df858e | 1218 | { |
32dcd021 | 1219 | struct evsel *evsel; |
98df858e AK |
1220 | u64 branch_type = 0; |
1221 | ||
e5cadb93 | 1222 | evlist__for_each_entry(evlist, evsel) |
1fc632ce | 1223 | branch_type |= evsel->core.attr.branch_sample_type; |
98df858e AK |
1224 | return branch_type; |
1225 | } | |
1226 | ||
63503dba | 1227 | bool perf_evlist__valid_read_format(struct evlist *evlist) |
9ede473c | 1228 | { |
32dcd021 | 1229 | struct evsel *first = perf_evlist__first(evlist), *pos = first; |
1fc632ce JO |
1230 | u64 read_format = first->core.attr.read_format; |
1231 | u64 sample_type = first->core.attr.sample_type; | |
9ede473c | 1232 | |
e5cadb93 | 1233 | evlist__for_each_entry(evlist, pos) { |
1fc632ce | 1234 | if (read_format != pos->core.attr.read_format) |
9ede473c JO |
1235 | return false; |
1236 | } | |
1237 | ||
1238 | /* PERF_SAMPLE_READ imples PERF_FORMAT_ID. */ | |
1239 | if ((sample_type & PERF_SAMPLE_READ) && | |
1240 | !(read_format & PERF_FORMAT_ID)) { | |
1241 | return false; | |
1242 | } | |
1243 | ||
1244 | return true; | |
1245 | } | |
1246 | ||
63503dba | 1247 | u64 perf_evlist__read_format(struct evlist *evlist) |
9ede473c | 1248 | { |
32dcd021 | 1249 | struct evsel *first = perf_evlist__first(evlist); |
1fc632ce | 1250 | return first->core.attr.read_format; |
9ede473c JO |
1251 | } |
1252 | ||
63503dba | 1253 | u16 perf_evlist__id_hdr_size(struct evlist *evlist) |
81e36bff | 1254 | { |
32dcd021 | 1255 | struct evsel *first = perf_evlist__first(evlist); |
81e36bff ACM |
1256 | struct perf_sample *data; |
1257 | u64 sample_type; | |
1258 | u16 size = 0; | |
1259 | ||
1fc632ce | 1260 | if (!first->core.attr.sample_id_all) |
81e36bff ACM |
1261 | goto out; |
1262 | ||
1fc632ce | 1263 | sample_type = first->core.attr.sample_type; |
81e36bff ACM |
1264 | |
1265 | if (sample_type & PERF_SAMPLE_TID) | |
1266 | size += sizeof(data->tid) * 2; | |
1267 | ||
1268 | if (sample_type & PERF_SAMPLE_TIME) | |
1269 | size += sizeof(data->time); | |
1270 | ||
1271 | if (sample_type & PERF_SAMPLE_ID) | |
1272 | size += sizeof(data->id); | |
1273 | ||
1274 | if (sample_type & PERF_SAMPLE_STREAM_ID) | |
1275 | size += sizeof(data->stream_id); | |
1276 | ||
1277 | if (sample_type & PERF_SAMPLE_CPU) | |
1278 | size += sizeof(data->cpu) * 2; | |
75562573 AH |
1279 | |
1280 | if (sample_type & PERF_SAMPLE_IDENTIFIER) | |
1281 | size += sizeof(data->id); | |
81e36bff ACM |
1282 | out: |
1283 | return size; | |
1284 | } | |
1285 | ||
63503dba | 1286 | bool perf_evlist__valid_sample_id_all(struct evlist *evlist) |
74429964 | 1287 | { |
32dcd021 | 1288 | struct evsel *first = perf_evlist__first(evlist), *pos = first; |
c2a70653 | 1289 | |
e5cadb93 | 1290 | evlist__for_each_entry_continue(evlist, pos) { |
1fc632ce | 1291 | if (first->core.attr.sample_id_all != pos->core.attr.sample_id_all) |
c2a70653 | 1292 | return false; |
74429964 FW |
1293 | } |
1294 | ||
c2a70653 ACM |
1295 | return true; |
1296 | } | |
1297 | ||
63503dba | 1298 | bool perf_evlist__sample_id_all(struct evlist *evlist) |
c2a70653 | 1299 | { |
32dcd021 | 1300 | struct evsel *first = perf_evlist__first(evlist); |
1fc632ce | 1301 | return first->core.attr.sample_id_all; |
74429964 | 1302 | } |
81cce8de | 1303 | |
63503dba | 1304 | void perf_evlist__set_selected(struct evlist *evlist, |
32dcd021 | 1305 | struct evsel *evsel) |
81cce8de ACM |
1306 | { |
1307 | evlist->selected = evsel; | |
1308 | } | |
727ab04e | 1309 | |
750b4ede | 1310 | void evlist__close(struct evlist *evlist) |
a74b4b66 | 1311 | { |
32dcd021 | 1312 | struct evsel *evsel; |
a74b4b66 | 1313 | |
475fb533 | 1314 | evlist__for_each_entry_reverse(evlist, evsel) |
88761fa1 | 1315 | evsel__close(evsel); |
a74b4b66 NK |
1316 | } |
1317 | ||
63503dba | 1318 | static int perf_evlist__create_syswide_maps(struct evlist *evlist) |
4112eb18 | 1319 | { |
f854839b | 1320 | struct perf_cpu_map *cpus; |
9749b90e | 1321 | struct perf_thread_map *threads; |
4112eb18 ACM |
1322 | int err = -ENOMEM; |
1323 | ||
1324 | /* | |
1325 | * Try reading /sys/devices/system/cpu/online to get | |
1326 | * an all cpus map. | |
1327 | * | |
1328 | * FIXME: -ENOMEM is the best we can do here, the cpu_map | |
1329 | * code needs an overhaul to properly forward the | |
1330 | * error, and we may not want to do that fallback to a | |
1331 | * default cpu identity map :-\ | |
1332 | */ | |
9c3516d1 | 1333 | cpus = perf_cpu_map__new(NULL); |
8c0498b6 | 1334 | if (!cpus) |
4112eb18 ACM |
1335 | goto out; |
1336 | ||
4b49cce2 | 1337 | threads = perf_thread_map__new_dummy(); |
8c0498b6 AH |
1338 | if (!threads) |
1339 | goto out_put; | |
4112eb18 | 1340 | |
453fa030 | 1341 | perf_evlist__set_maps(&evlist->core, cpus, threads); |
4112eb18 ACM |
1342 | out: |
1343 | return err; | |
8c0498b6 | 1344 | out_put: |
38f01d8d | 1345 | perf_cpu_map__put(cpus); |
4112eb18 ACM |
1346 | goto out; |
1347 | } | |
1348 | ||
474ddc4c | 1349 | int evlist__open(struct evlist *evlist) |
727ab04e | 1350 | { |
32dcd021 | 1351 | struct evsel *evsel; |
a74b4b66 | 1352 | int err; |
727ab04e | 1353 | |
4112eb18 ACM |
1354 | /* |
1355 | * Default: one fd per CPU, all threads, aka systemwide | |
1356 | * as sys_perf_event_open(cpu = -1, thread = -1) is EINVAL | |
1357 | */ | |
03617c22 | 1358 | if (evlist->core.threads == NULL && evlist->core.cpus == NULL) { |
4112eb18 ACM |
1359 | err = perf_evlist__create_syswide_maps(evlist); |
1360 | if (err < 0) | |
1361 | goto out_err; | |
1362 | } | |
1363 | ||
733cd2fe AH |
1364 | perf_evlist__update_id_pos(evlist); |
1365 | ||
e5cadb93 | 1366 | evlist__for_each_entry(evlist, evsel) { |
af663bd0 | 1367 | err = evsel__open(evsel, evsel->core.cpus, evsel->core.threads); |
727ab04e ACM |
1368 | if (err < 0) |
1369 | goto out_err; | |
1370 | } | |
1371 | ||
1372 | return 0; | |
1373 | out_err: | |
750b4ede | 1374 | evlist__close(evlist); |
41c21a68 | 1375 | errno = -err; |
727ab04e ACM |
1376 | return err; |
1377 | } | |
35b9d88e | 1378 | |
63503dba | 1379 | int perf_evlist__prepare_workload(struct evlist *evlist, struct target *target, |
55e162ea | 1380 | const char *argv[], bool pipe_output, |
735f7e0b | 1381 | void (*exec_error)(int signo, siginfo_t *info, void *ucontext)) |
35b9d88e ACM |
1382 | { |
1383 | int child_ready_pipe[2], go_pipe[2]; | |
1384 | char bf; | |
1385 | ||
1386 | if (pipe(child_ready_pipe) < 0) { | |
1387 | perror("failed to create 'ready' pipe"); | |
1388 | return -1; | |
1389 | } | |
1390 | ||
1391 | if (pipe(go_pipe) < 0) { | |
1392 | perror("failed to create 'go' pipe"); | |
1393 | goto out_close_ready_pipe; | |
1394 | } | |
1395 | ||
1396 | evlist->workload.pid = fork(); | |
1397 | if (evlist->workload.pid < 0) { | |
1398 | perror("failed to fork"); | |
1399 | goto out_close_pipes; | |
1400 | } | |
1401 | ||
1402 | if (!evlist->workload.pid) { | |
5f1c4225 ACM |
1403 | int ret; |
1404 | ||
119fa3c9 | 1405 | if (pipe_output) |
35b9d88e ACM |
1406 | dup2(2, 1); |
1407 | ||
0817df08 DA |
1408 | signal(SIGTERM, SIG_DFL); |
1409 | ||
35b9d88e ACM |
1410 | close(child_ready_pipe[0]); |
1411 | close(go_pipe[1]); | |
1412 | fcntl(go_pipe[0], F_SETFD, FD_CLOEXEC); | |
1413 | ||
35b9d88e ACM |
1414 | /* |
1415 | * Tell the parent we're ready to go | |
1416 | */ | |
1417 | close(child_ready_pipe[1]); | |
1418 | ||
1419 | /* | |
1420 | * Wait until the parent tells us to go. | |
1421 | */ | |
5f1c4225 ACM |
1422 | ret = read(go_pipe[0], &bf, 1); |
1423 | /* | |
1424 | * The parent will ask for the execvp() to be performed by | |
1425 | * writing exactly one byte, in workload.cork_fd, usually via | |
1426 | * perf_evlist__start_workload(). | |
1427 | * | |
20f86fc1 | 1428 | * For cancelling the workload without actually running it, |
5f1c4225 ACM |
1429 | * the parent will just close workload.cork_fd, without writing |
1430 | * anything, i.e. read will return zero and we just exit() | |
1431 | * here. | |
1432 | */ | |
1433 | if (ret != 1) { | |
1434 | if (ret == -1) | |
1435 | perror("unable to read pipe"); | |
1436 | exit(ret); | |
1437 | } | |
35b9d88e ACM |
1438 | |
1439 | execvp(argv[0], (char **)argv); | |
1440 | ||
735f7e0b | 1441 | if (exec_error) { |
f33cbe72 ACM |
1442 | union sigval val; |
1443 | ||
1444 | val.sival_int = errno; | |
1445 | if (sigqueue(getppid(), SIGUSR1, val)) | |
1446 | perror(argv[0]); | |
1447 | } else | |
1448 | perror(argv[0]); | |
35b9d88e ACM |
1449 | exit(-1); |
1450 | } | |
1451 | ||
735f7e0b ACM |
1452 | if (exec_error) { |
1453 | struct sigaction act = { | |
1454 | .sa_flags = SA_SIGINFO, | |
1455 | .sa_sigaction = exec_error, | |
1456 | }; | |
1457 | sigaction(SIGUSR1, &act, NULL); | |
1458 | } | |
1459 | ||
1aaf63b1 | 1460 | if (target__none(target)) { |
03617c22 | 1461 | if (evlist->core.threads == NULL) { |
1aaf63b1 ACM |
1462 | fprintf(stderr, "FATAL: evlist->threads need to be set at this point (%s:%d).\n", |
1463 | __func__, __LINE__); | |
1464 | goto out_close_pipes; | |
1465 | } | |
03617c22 | 1466 | perf_thread_map__set_pid(evlist->core.threads, 0, evlist->workload.pid); |
1aaf63b1 | 1467 | } |
35b9d88e ACM |
1468 | |
1469 | close(child_ready_pipe[1]); | |
1470 | close(go_pipe[0]); | |
1471 | /* | |
1472 | * wait for child to settle | |
1473 | */ | |
1474 | if (read(child_ready_pipe[0], &bf, 1) == -1) { | |
1475 | perror("unable to read pipe"); | |
1476 | goto out_close_pipes; | |
1477 | } | |
1478 | ||
bcf3145f | 1479 | fcntl(go_pipe[1], F_SETFD, FD_CLOEXEC); |
35b9d88e ACM |
1480 | evlist->workload.cork_fd = go_pipe[1]; |
1481 | close(child_ready_pipe[0]); | |
1482 | return 0; | |
1483 | ||
1484 | out_close_pipes: | |
1485 | close(go_pipe[0]); | |
1486 | close(go_pipe[1]); | |
1487 | out_close_ready_pipe: | |
1488 | close(child_ready_pipe[0]); | |
1489 | close(child_ready_pipe[1]); | |
1490 | return -1; | |
1491 | } | |
1492 | ||
63503dba | 1493 | int perf_evlist__start_workload(struct evlist *evlist) |
35b9d88e ACM |
1494 | { |
1495 | if (evlist->workload.cork_fd > 0) { | |
b3824404 | 1496 | char bf = 0; |
bcf3145f | 1497 | int ret; |
35b9d88e ACM |
1498 | /* |
1499 | * Remove the cork, let it rip! | |
1500 | */ | |
bcf3145f NK |
1501 | ret = write(evlist->workload.cork_fd, &bf, 1); |
1502 | if (ret < 0) | |
e978be9e | 1503 | perror("unable to write to pipe"); |
bcf3145f NK |
1504 | |
1505 | close(evlist->workload.cork_fd); | |
1506 | return ret; | |
35b9d88e ACM |
1507 | } |
1508 | ||
1509 | return 0; | |
1510 | } | |
cb0b29e0 | 1511 | |
63503dba | 1512 | int perf_evlist__parse_sample(struct evlist *evlist, union perf_event *event, |
0807d2d8 | 1513 | struct perf_sample *sample) |
cb0b29e0 | 1514 | { |
32dcd021 | 1515 | struct evsel *evsel = perf_evlist__event2evsel(evlist, event); |
75562573 AH |
1516 | |
1517 | if (!evsel) | |
1518 | return -EFAULT; | |
0807d2d8 | 1519 | return perf_evsel__parse_sample(evsel, event, sample); |
cb0b29e0 | 1520 | } |
78f067b3 | 1521 | |
63503dba | 1522 | int perf_evlist__parse_sample_timestamp(struct evlist *evlist, |
01468120 JO |
1523 | union perf_event *event, |
1524 | u64 *timestamp) | |
1525 | { | |
32dcd021 | 1526 | struct evsel *evsel = perf_evlist__event2evsel(evlist, event); |
01468120 JO |
1527 | |
1528 | if (!evsel) | |
1529 | return -EFAULT; | |
1530 | return perf_evsel__parse_sample_timestamp(evsel, event, timestamp); | |
1531 | } | |
1532 | ||
63503dba | 1533 | size_t perf_evlist__fprintf(struct evlist *evlist, FILE *fp) |
78f067b3 | 1534 | { |
32dcd021 | 1535 | struct evsel *evsel; |
78f067b3 ACM |
1536 | size_t printed = 0; |
1537 | ||
e5cadb93 | 1538 | evlist__for_each_entry(evlist, evsel) { |
78f067b3 ACM |
1539 | printed += fprintf(fp, "%s%s", evsel->idx ? ", " : "", |
1540 | perf_evsel__name(evsel)); | |
1541 | } | |
1542 | ||
b2222139 | 1543 | return printed + fprintf(fp, "\n"); |
78f067b3 | 1544 | } |
6ef068cb | 1545 | |
63503dba | 1546 | int perf_evlist__strerror_open(struct evlist *evlist, |
a8f23d8f ACM |
1547 | int err, char *buf, size_t size) |
1548 | { | |
1549 | int printed, value; | |
c8b5f2c9 | 1550 | char sbuf[STRERR_BUFSIZE], *emsg = str_error_r(err, sbuf, sizeof(sbuf)); |
a8f23d8f ACM |
1551 | |
1552 | switch (err) { | |
1553 | case EACCES: | |
1554 | case EPERM: | |
1555 | printed = scnprintf(buf, size, | |
1556 | "Error:\t%s.\n" | |
1557 | "Hint:\tCheck /proc/sys/kernel/perf_event_paranoid setting.", emsg); | |
1558 | ||
1a47245d | 1559 | value = perf_event_paranoid(); |
a8f23d8f ACM |
1560 | |
1561 | printed += scnprintf(buf + printed, size - printed, "\nHint:\t"); | |
1562 | ||
1563 | if (value >= 2) { | |
1564 | printed += scnprintf(buf + printed, size - printed, | |
1565 | "For your workloads it needs to be <= 1\nHint:\t"); | |
1566 | } | |
1567 | printed += scnprintf(buf + printed, size - printed, | |
5229e366 | 1568 | "For system wide tracing it needs to be set to -1.\n"); |
a8f23d8f ACM |
1569 | |
1570 | printed += scnprintf(buf + printed, size - printed, | |
5229e366 ACM |
1571 | "Hint:\tTry: 'sudo sh -c \"echo -1 > /proc/sys/kernel/perf_event_paranoid\"'\n" |
1572 | "Hint:\tThe current value is %d.", value); | |
a8f23d8f | 1573 | break; |
d9aade7f | 1574 | case EINVAL: { |
32dcd021 | 1575 | struct evsel *first = perf_evlist__first(evlist); |
d9aade7f ACM |
1576 | int max_freq; |
1577 | ||
1578 | if (sysctl__read_int("kernel/perf_event_max_sample_rate", &max_freq) < 0) | |
1579 | goto out_default; | |
1580 | ||
1fc632ce | 1581 | if (first->core.attr.sample_freq < (u64)max_freq) |
d9aade7f ACM |
1582 | goto out_default; |
1583 | ||
1584 | printed = scnprintf(buf, size, | |
1585 | "Error:\t%s.\n" | |
1586 | "Hint:\tCheck /proc/sys/kernel/perf_event_max_sample_rate.\n" | |
1587 | "Hint:\tThe current value is %d and %" PRIu64 " is being requested.", | |
1fc632ce | 1588 | emsg, max_freq, first->core.attr.sample_freq); |
d9aade7f ACM |
1589 | break; |
1590 | } | |
a8f23d8f | 1591 | default: |
d9aade7f | 1592 | out_default: |
a8f23d8f ACM |
1593 | scnprintf(buf, size, "%s", emsg); |
1594 | break; | |
1595 | } | |
1596 | ||
1597 | return 0; | |
1598 | } | |
a025e4f0 | 1599 | |
63503dba | 1600 | int perf_evlist__strerror_mmap(struct evlist *evlist, int err, char *buf, size_t size) |
956fa571 | 1601 | { |
c8b5f2c9 | 1602 | char sbuf[STRERR_BUFSIZE], *emsg = str_error_r(err, sbuf, sizeof(sbuf)); |
f6fa4375 | 1603 | int pages_attempted = evlist->core.mmap_len / 1024, pages_max_per_user, printed = 0; |
956fa571 ACM |
1604 | |
1605 | switch (err) { | |
1606 | case EPERM: | |
e5d4a290 | 1607 | sysctl__read_int("kernel/perf_event_mlock_kb", &pages_max_per_user); |
e965bea1 ACM |
1608 | printed += scnprintf(buf + printed, size - printed, |
1609 | "Error:\t%s.\n" | |
956fa571 | 1610 | "Hint:\tCheck /proc/sys/kernel/perf_event_mlock_kb (%d kB) setting.\n" |
e965bea1 | 1611 | "Hint:\tTried using %zd kB.\n", |
e5d4a290 | 1612 | emsg, pages_max_per_user, pages_attempted); |
e965bea1 ACM |
1613 | |
1614 | if (pages_attempted >= pages_max_per_user) { | |
1615 | printed += scnprintf(buf + printed, size - printed, | |
1616 | "Hint:\tTry 'sudo sh -c \"echo %d > /proc/sys/kernel/perf_event_mlock_kb\"', or\n", | |
1617 | pages_max_per_user + pages_attempted); | |
1618 | } | |
1619 | ||
1620 | printed += scnprintf(buf + printed, size - printed, | |
1621 | "Hint:\tTry using a smaller -m/--mmap-pages value."); | |
956fa571 ACM |
1622 | break; |
1623 | default: | |
1624 | scnprintf(buf, size, "%s", emsg); | |
1625 | break; | |
1626 | } | |
1627 | ||
1628 | return 0; | |
1629 | } | |
1630 | ||
63503dba | 1631 | void perf_evlist__to_front(struct evlist *evlist, |
32dcd021 | 1632 | struct evsel *move_evsel) |
a025e4f0 | 1633 | { |
32dcd021 | 1634 | struct evsel *evsel, *n; |
a025e4f0 AH |
1635 | LIST_HEAD(move); |
1636 | ||
1637 | if (move_evsel == perf_evlist__first(evlist)) | |
1638 | return; | |
1639 | ||
e5cadb93 | 1640 | evlist__for_each_entry_safe(evlist, n, evsel) { |
a025e4f0 | 1641 | if (evsel->leader == move_evsel->leader) |
b27c4ece | 1642 | list_move_tail(&evsel->core.node, &move); |
a025e4f0 AH |
1643 | } |
1644 | ||
ce9036a6 | 1645 | list_splice(&move, &evlist->core.entries); |
a025e4f0 | 1646 | } |
60b0896c | 1647 | |
63503dba | 1648 | void perf_evlist__set_tracking_event(struct evlist *evlist, |
32dcd021 | 1649 | struct evsel *tracking_evsel) |
60b0896c | 1650 | { |
32dcd021 | 1651 | struct evsel *evsel; |
60b0896c AH |
1652 | |
1653 | if (tracking_evsel->tracking) | |
1654 | return; | |
1655 | ||
e5cadb93 | 1656 | evlist__for_each_entry(evlist, evsel) { |
60b0896c AH |
1657 | if (evsel != tracking_evsel) |
1658 | evsel->tracking = false; | |
1659 | } | |
1660 | ||
1661 | tracking_evsel->tracking = true; | |
1662 | } | |
7630b3e2 | 1663 | |
32dcd021 | 1664 | struct evsel * |
63503dba | 1665 | perf_evlist__find_evsel_by_str(struct evlist *evlist, |
7630b3e2 WN |
1666 | const char *str) |
1667 | { | |
32dcd021 | 1668 | struct evsel *evsel; |
7630b3e2 | 1669 | |
e5cadb93 | 1670 | evlist__for_each_entry(evlist, evsel) { |
7630b3e2 WN |
1671 | if (!evsel->name) |
1672 | continue; | |
1673 | if (strcmp(str, evsel->name) == 0) | |
1674 | return evsel; | |
1675 | } | |
1676 | ||
1677 | return NULL; | |
1678 | } | |
54cc54de | 1679 | |
63503dba | 1680 | void perf_evlist__toggle_bkw_mmap(struct evlist *evlist, |
54cc54de WN |
1681 | enum bkw_mmap_state state) |
1682 | { | |
1683 | enum bkw_mmap_state old_state = evlist->bkw_mmap_state; | |
1684 | enum action { | |
1685 | NONE, | |
1686 | PAUSE, | |
1687 | RESUME, | |
1688 | } action = NONE; | |
1689 | ||
0b72d69a | 1690 | if (!evlist->overwrite_mmap) |
54cc54de WN |
1691 | return; |
1692 | ||
1693 | switch (old_state) { | |
1694 | case BKW_MMAP_NOTREADY: { | |
1695 | if (state != BKW_MMAP_RUNNING) | |
dd8bd53a | 1696 | goto state_err; |
54cc54de WN |
1697 | break; |
1698 | } | |
1699 | case BKW_MMAP_RUNNING: { | |
1700 | if (state != BKW_MMAP_DATA_PENDING) | |
1701 | goto state_err; | |
1702 | action = PAUSE; | |
1703 | break; | |
1704 | } | |
1705 | case BKW_MMAP_DATA_PENDING: { | |
1706 | if (state != BKW_MMAP_EMPTY) | |
1707 | goto state_err; | |
1708 | break; | |
1709 | } | |
1710 | case BKW_MMAP_EMPTY: { | |
1711 | if (state != BKW_MMAP_RUNNING) | |
1712 | goto state_err; | |
1713 | action = RESUME; | |
1714 | break; | |
1715 | } | |
1716 | default: | |
1717 | WARN_ONCE(1, "Shouldn't get there\n"); | |
1718 | } | |
1719 | ||
1720 | evlist->bkw_mmap_state = state; | |
1721 | ||
1722 | switch (action) { | |
1723 | case PAUSE: | |
1724 | perf_evlist__pause(evlist); | |
1725 | break; | |
1726 | case RESUME: | |
1727 | perf_evlist__resume(evlist); | |
1728 | break; | |
1729 | case NONE: | |
1730 | default: | |
1731 | break; | |
1732 | } | |
1733 | ||
1734 | state_err: | |
1735 | return; | |
1736 | } | |
07d6f446 | 1737 | |
63503dba | 1738 | bool perf_evlist__exclude_kernel(struct evlist *evlist) |
07d6f446 | 1739 | { |
32dcd021 | 1740 | struct evsel *evsel; |
07d6f446 ACM |
1741 | |
1742 | evlist__for_each_entry(evlist, evsel) { | |
1fc632ce | 1743 | if (!evsel->core.attr.exclude_kernel) |
07d6f446 ACM |
1744 | return false; |
1745 | } | |
1746 | ||
1747 | return true; | |
1748 | } | |
e2bdbe80 JY |
1749 | |
1750 | /* | |
1751 | * Events in data file are not collect in groups, but we still want | |
1752 | * the group display. Set the artificial group and set the leader's | |
1753 | * forced_leader flag to notify the display code. | |
1754 | */ | |
63503dba | 1755 | void perf_evlist__force_leader(struct evlist *evlist) |
e2bdbe80 JY |
1756 | { |
1757 | if (!evlist->nr_groups) { | |
32dcd021 | 1758 | struct evsel *leader = perf_evlist__first(evlist); |
e2bdbe80 JY |
1759 | |
1760 | perf_evlist__set_leader(evlist); | |
1761 | leader->forced_leader = true; | |
1762 | } | |
1763 | } | |
c3537fc2 | 1764 | |
63503dba | 1765 | struct evsel *perf_evlist__reset_weak_group(struct evlist *evsel_list, |
32dcd021 | 1766 | struct evsel *evsel) |
c3537fc2 | 1767 | { |
32dcd021 | 1768 | struct evsel *c2, *leader; |
c3537fc2 AK |
1769 | bool is_open = true; |
1770 | ||
1771 | leader = evsel->leader; | |
1772 | pr_debug("Weak group for %s/%d failed\n", | |
5643b1a5 | 1773 | leader->name, leader->core.nr_members); |
c3537fc2 AK |
1774 | |
1775 | /* | |
1776 | * for_each_group_member doesn't work here because it doesn't | |
1777 | * include the first entry. | |
1778 | */ | |
1779 | evlist__for_each_entry(evsel_list, c2) { | |
1780 | if (c2 == evsel) | |
1781 | is_open = false; | |
1782 | if (c2->leader == leader) { | |
1783 | if (is_open) | |
88761fa1 | 1784 | evsel__close(c2); |
c3537fc2 | 1785 | c2->leader = c2; |
5643b1a5 | 1786 | c2->core.nr_members = 0; |
c3537fc2 AK |
1787 | } |
1788 | } | |
1789 | return leader; | |
1790 | } | |
657ee553 | 1791 | |
63503dba | 1792 | int perf_evlist__add_sb_event(struct evlist **evlist, |
657ee553 SL |
1793 | struct perf_event_attr *attr, |
1794 | perf_evsel__sb_cb_t cb, | |
1795 | void *data) | |
1796 | { | |
32dcd021 | 1797 | struct evsel *evsel; |
657ee553 SL |
1798 | bool new_evlist = (*evlist) == NULL; |
1799 | ||
1800 | if (*evlist == NULL) | |
0f98b11c | 1801 | *evlist = evlist__new(); |
657ee553 SL |
1802 | if (*evlist == NULL) |
1803 | return -1; | |
1804 | ||
1805 | if (!attr->sample_id_all) { | |
1806 | pr_warning("enabling sample_id_all for all side band events\n"); | |
1807 | attr->sample_id_all = 1; | |
1808 | } | |
1809 | ||
6484d2f9 | 1810 | evsel = perf_evsel__new_idx(attr, (*evlist)->core.nr_entries); |
657ee553 SL |
1811 | if (!evsel) |
1812 | goto out_err; | |
1813 | ||
1814 | evsel->side_band.cb = cb; | |
1815 | evsel->side_band.data = data; | |
a1cf3a75 | 1816 | evlist__add(*evlist, evsel); |
657ee553 SL |
1817 | return 0; |
1818 | ||
1819 | out_err: | |
1820 | if (new_evlist) { | |
c12995a5 | 1821 | evlist__delete(*evlist); |
657ee553 SL |
1822 | *evlist = NULL; |
1823 | } | |
1824 | return -1; | |
1825 | } | |
1826 | ||
1827 | static void *perf_evlist__poll_thread(void *arg) | |
1828 | { | |
63503dba | 1829 | struct evlist *evlist = arg; |
657ee553 | 1830 | bool draining = false; |
adc6257c | 1831 | int i, done = 0; |
b397f846 ACM |
1832 | /* |
1833 | * In order to read symbols from other namespaces perf to needs to call | |
1834 | * setns(2). This isn't permitted if the struct_fs has multiple users. | |
1835 | * unshare(2) the fs so that we may continue to setns into namespaces | |
1836 | * that we're observing when, for instance, reading the build-ids at | |
1837 | * the end of a 'perf record' session. | |
1838 | */ | |
1839 | unshare(CLONE_FS); | |
adc6257c JO |
1840 | |
1841 | while (!done) { | |
1842 | bool got_data = false; | |
657ee553 | 1843 | |
adc6257c | 1844 | if (evlist->thread.done) |
657ee553 SL |
1845 | draining = true; |
1846 | ||
1847 | if (!draining) | |
1848 | perf_evlist__poll(evlist, 1000); | |
1849 | ||
c976ee11 | 1850 | for (i = 0; i < evlist->core.nr_mmaps; i++) { |
a5830532 | 1851 | struct mmap *map = &evlist->mmap[i]; |
657ee553 SL |
1852 | union perf_event *event; |
1853 | ||
1854 | if (perf_mmap__read_init(map)) | |
1855 | continue; | |
1856 | while ((event = perf_mmap__read_event(map)) != NULL) { | |
32dcd021 | 1857 | struct evsel *evsel = perf_evlist__event2evsel(evlist, event); |
657ee553 SL |
1858 | |
1859 | if (evsel && evsel->side_band.cb) | |
1860 | evsel->side_band.cb(event, evsel->side_band.data); | |
1861 | else | |
1862 | pr_warning("cannot locate proper evsel for the side band event\n"); | |
1863 | ||
1864 | perf_mmap__consume(map); | |
adc6257c | 1865 | got_data = true; |
657ee553 SL |
1866 | } |
1867 | perf_mmap__read_done(map); | |
1868 | } | |
adc6257c JO |
1869 | |
1870 | if (draining && !got_data) | |
1871 | break; | |
657ee553 SL |
1872 | } |
1873 | return NULL; | |
1874 | } | |
1875 | ||
63503dba | 1876 | int perf_evlist__start_sb_thread(struct evlist *evlist, |
657ee553 SL |
1877 | struct target *target) |
1878 | { | |
32dcd021 | 1879 | struct evsel *counter; |
657ee553 SL |
1880 | |
1881 | if (!evlist) | |
1882 | return 0; | |
1883 | ||
1884 | if (perf_evlist__create_maps(evlist, target)) | |
1885 | goto out_delete_evlist; | |
1886 | ||
1887 | evlist__for_each_entry(evlist, counter) { | |
f72f901d | 1888 | if (evsel__open(counter, evlist->core.cpus, |
03617c22 | 1889 | evlist->core.threads) < 0) |
657ee553 SL |
1890 | goto out_delete_evlist; |
1891 | } | |
1892 | ||
9521b5f2 | 1893 | if (evlist__mmap(evlist, UINT_MAX)) |
657ee553 SL |
1894 | goto out_delete_evlist; |
1895 | ||
1896 | evlist__for_each_entry(evlist, counter) { | |
ec7f24ef | 1897 | if (evsel__enable(counter)) |
657ee553 SL |
1898 | goto out_delete_evlist; |
1899 | } | |
1900 | ||
1901 | evlist->thread.done = 0; | |
1902 | if (pthread_create(&evlist->thread.th, NULL, perf_evlist__poll_thread, evlist)) | |
1903 | goto out_delete_evlist; | |
1904 | ||
1905 | return 0; | |
1906 | ||
1907 | out_delete_evlist: | |
c12995a5 | 1908 | evlist__delete(evlist); |
657ee553 SL |
1909 | evlist = NULL; |
1910 | return -1; | |
1911 | } | |
1912 | ||
63503dba | 1913 | void perf_evlist__stop_sb_thread(struct evlist *evlist) |
657ee553 SL |
1914 | { |
1915 | if (!evlist) | |
1916 | return; | |
1917 | evlist->thread.done = 1; | |
1918 | pthread_join(evlist->thread.th, NULL); | |
c12995a5 | 1919 | evlist__delete(evlist); |
657ee553 | 1920 | } |