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)) |
8cd36f3e | 53 | #define SID(e, x, y) xyarray__entry(e->core.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 | 57 | { |
4562a739 | 58 | perf_evlist__init(&evlist->core); |
453fa030 | 59 | perf_evlist__set_maps(&evlist->core, cpus, threads); |
40cb2d51 | 60 | fdarray__init(&evlist->core.pollfd, 64); |
35b9d88e | 61 | evlist->workload.pid = -1; |
54cc54de | 62 | evlist->bkw_mmap_state = BKW_MMAP_NOTREADY; |
ef1d1af2 ACM |
63 | } |
64 | ||
0f98b11c | 65 | struct evlist *evlist__new(void) |
361c99a6 | 66 | { |
63503dba | 67 | struct evlist *evlist = zalloc(sizeof(*evlist)); |
361c99a6 | 68 | |
ef1d1af2 | 69 | if (evlist != NULL) |
52c86bca | 70 | evlist__init(evlist, NULL, NULL); |
361c99a6 ACM |
71 | |
72 | return evlist; | |
73 | } | |
74 | ||
63503dba | 75 | struct evlist *perf_evlist__new_default(void) |
b22d54b0 | 76 | { |
0f98b11c | 77 | struct evlist *evlist = evlist__new(); |
b22d54b0 JO |
78 | |
79 | if (evlist && perf_evlist__add_default(evlist)) { | |
c12995a5 | 80 | evlist__delete(evlist); |
b22d54b0 JO |
81 | evlist = NULL; |
82 | } | |
83 | ||
84 | return evlist; | |
85 | } | |
86 | ||
63503dba | 87 | struct evlist *perf_evlist__new_dummy(void) |
5bae0250 | 88 | { |
0f98b11c | 89 | struct evlist *evlist = evlist__new(); |
5bae0250 ACM |
90 | |
91 | if (evlist && perf_evlist__add_dummy(evlist)) { | |
c12995a5 | 92 | evlist__delete(evlist); |
5bae0250 ACM |
93 | evlist = NULL; |
94 | } | |
95 | ||
96 | return evlist; | |
97 | } | |
98 | ||
75562573 AH |
99 | /** |
100 | * perf_evlist__set_id_pos - set the positions of event ids. | |
101 | * @evlist: selected event list | |
102 | * | |
103 | * Events with compatible sample types all have the same id_pos | |
104 | * and is_pos. For convenience, put a copy on evlist. | |
105 | */ | |
63503dba | 106 | void perf_evlist__set_id_pos(struct evlist *evlist) |
75562573 | 107 | { |
515dbe48 | 108 | struct evsel *first = evlist__first(evlist); |
75562573 AH |
109 | |
110 | evlist->id_pos = first->id_pos; | |
111 | evlist->is_pos = first->is_pos; | |
112 | } | |
113 | ||
63503dba | 114 | static void perf_evlist__update_id_pos(struct evlist *evlist) |
733cd2fe | 115 | { |
32dcd021 | 116 | struct evsel *evsel; |
733cd2fe | 117 | |
e5cadb93 | 118 | evlist__for_each_entry(evlist, evsel) |
733cd2fe AH |
119 | perf_evsel__calc_id_pos(evsel); |
120 | ||
121 | perf_evlist__set_id_pos(evlist); | |
122 | } | |
123 | ||
e6b1878d | 124 | static void evlist__purge(struct evlist *evlist) |
361c99a6 | 125 | { |
32dcd021 | 126 | struct evsel *pos, *n; |
361c99a6 | 127 | |
e5cadb93 | 128 | evlist__for_each_entry_safe(evlist, n, pos) { |
b27c4ece | 129 | list_del_init(&pos->core.node); |
d49e4695 | 130 | pos->evlist = NULL; |
5eb2dd2a | 131 | evsel__delete(pos); |
361c99a6 ACM |
132 | } |
133 | ||
6484d2f9 | 134 | evlist->core.nr_entries = 0; |
361c99a6 ACM |
135 | } |
136 | ||
470579b0 | 137 | void evlist__exit(struct evlist *evlist) |
361c99a6 | 138 | { |
04662523 | 139 | zfree(&evlist->mmap); |
0b72d69a | 140 | zfree(&evlist->overwrite_mmap); |
40cb2d51 | 141 | fdarray__exit(&evlist->core.pollfd); |
ef1d1af2 ACM |
142 | } |
143 | ||
c12995a5 | 144 | void evlist__delete(struct evlist *evlist) |
ef1d1af2 | 145 | { |
0b04b3dc ACM |
146 | if (evlist == NULL) |
147 | return; | |
148 | ||
db6b7b13 | 149 | evlist__munmap(evlist); |
750b4ede | 150 | evlist__close(evlist); |
f72f901d | 151 | perf_cpu_map__put(evlist->core.cpus); |
03617c22 | 152 | perf_thread_map__put(evlist->core.threads); |
f72f901d | 153 | evlist->core.cpus = NULL; |
03617c22 | 154 | evlist->core.threads = NULL; |
e6b1878d | 155 | evlist__purge(evlist); |
470579b0 | 156 | evlist__exit(evlist); |
361c99a6 ACM |
157 | free(evlist); |
158 | } | |
159 | ||
a1cf3a75 | 160 | void evlist__add(struct evlist *evlist, struct evsel *entry) |
361c99a6 | 161 | { |
d49e4695 | 162 | entry->evlist = evlist; |
6484d2f9 | 163 | entry->idx = evlist->core.nr_entries; |
60b0896c | 164 | entry->tracking = !entry->idx; |
ef503831 | 165 | |
6484d2f9 JO |
166 | perf_evlist__add(&evlist->core, &entry->core); |
167 | ||
168 | if (evlist->core.nr_entries == 1) | |
75562573 | 169 | perf_evlist__set_id_pos(evlist); |
361c99a6 ACM |
170 | } |
171 | ||
16251027 | 172 | void evlist__remove(struct evlist *evlist, struct evsel *evsel) |
4768230a AH |
173 | { |
174 | evsel->evlist = NULL; | |
52e22fb8 | 175 | perf_evlist__remove(&evlist->core, &evsel->core); |
4768230a AH |
176 | } |
177 | ||
63503dba | 178 | void perf_evlist__splice_list_tail(struct evlist *evlist, |
f114d6ef | 179 | struct list_head *list) |
50d08e47 | 180 | { |
32dcd021 | 181 | struct evsel *evsel, *temp; |
75562573 | 182 | |
e5cadb93 | 183 | __evlist__for_each_entry_safe(list, temp, evsel) { |
b27c4ece | 184 | list_del_init(&evsel->core.node); |
a1cf3a75 | 185 | evlist__add(evlist, evsel); |
f114d6ef | 186 | } |
50d08e47 ACM |
187 | } |
188 | ||
63dab225 ACM |
189 | void __perf_evlist__set_leader(struct list_head *list) |
190 | { | |
32dcd021 | 191 | struct evsel *evsel, *leader; |
63dab225 | 192 | |
b27c4ece JO |
193 | leader = list_entry(list->next, struct evsel, core.node); |
194 | evsel = list_entry(list->prev, struct evsel, core.node); | |
97f63e4a | 195 | |
5643b1a5 | 196 | leader->core.nr_members = evsel->idx - leader->idx + 1; |
63dab225 | 197 | |
e5cadb93 | 198 | __evlist__for_each_entry(list, evsel) { |
74b2133d | 199 | evsel->leader = leader; |
63dab225 ACM |
200 | } |
201 | } | |
202 | ||
63503dba | 203 | void perf_evlist__set_leader(struct evlist *evlist) |
6a4bb04c | 204 | { |
6484d2f9 JO |
205 | if (evlist->core.nr_entries) { |
206 | evlist->nr_groups = evlist->core.nr_entries > 1 ? 1 : 0; | |
ce9036a6 | 207 | __perf_evlist__set_leader(&evlist->core.entries); |
97f63e4a | 208 | } |
6a4bb04c JO |
209 | } |
210 | ||
63503dba | 211 | int __perf_evlist__add_default(struct evlist *evlist, bool precise) |
361c99a6 | 212 | { |
32dcd021 | 213 | struct evsel *evsel = perf_evsel__new_cycles(precise); |
1aed2671 | 214 | |
361c99a6 | 215 | if (evsel == NULL) |
7c48dcfd | 216 | return -ENOMEM; |
361c99a6 | 217 | |
a1cf3a75 | 218 | evlist__add(evlist, evsel); |
361c99a6 ACM |
219 | return 0; |
220 | } | |
5c581041 | 221 | |
63503dba | 222 | int perf_evlist__add_dummy(struct evlist *evlist) |
5bae0250 ACM |
223 | { |
224 | struct perf_event_attr attr = { | |
225 | .type = PERF_TYPE_SOFTWARE, | |
226 | .config = PERF_COUNT_SW_DUMMY, | |
227 | .size = sizeof(attr), /* to capture ABI version */ | |
228 | }; | |
6484d2f9 | 229 | struct evsel *evsel = perf_evsel__new_idx(&attr, evlist->core.nr_entries); |
5bae0250 ACM |
230 | |
231 | if (evsel == NULL) | |
232 | return -ENOMEM; | |
233 | ||
a1cf3a75 | 234 | evlist__add(evlist, evsel); |
5bae0250 ACM |
235 | return 0; |
236 | } | |
237 | ||
a1cf3a75 | 238 | static int evlist__add_attrs(struct evlist *evlist, |
e60fc847 | 239 | struct perf_event_attr *attrs, size_t nr_attrs) |
50d08e47 | 240 | { |
32dcd021 | 241 | struct evsel *evsel, *n; |
50d08e47 ACM |
242 | LIST_HEAD(head); |
243 | size_t i; | |
244 | ||
245 | for (i = 0; i < nr_attrs; i++) { | |
6484d2f9 | 246 | evsel = perf_evsel__new_idx(attrs + i, evlist->core.nr_entries + i); |
50d08e47 ACM |
247 | if (evsel == NULL) |
248 | goto out_delete_partial_list; | |
b27c4ece | 249 | list_add_tail(&evsel->core.node, &head); |
50d08e47 ACM |
250 | } |
251 | ||
f114d6ef | 252 | perf_evlist__splice_list_tail(evlist, &head); |
50d08e47 ACM |
253 | |
254 | return 0; | |
255 | ||
256 | out_delete_partial_list: | |
e5cadb93 | 257 | __evlist__for_each_entry_safe(&head, n, evsel) |
5eb2dd2a | 258 | evsel__delete(evsel); |
50d08e47 ACM |
259 | return -1; |
260 | } | |
261 | ||
63503dba | 262 | int __perf_evlist__add_default_attrs(struct evlist *evlist, |
79695e1b ACM |
263 | struct perf_event_attr *attrs, size_t nr_attrs) |
264 | { | |
265 | size_t i; | |
266 | ||
267 | for (i = 0; i < nr_attrs; i++) | |
268 | event_attr_init(attrs + i); | |
269 | ||
a1cf3a75 | 270 | return evlist__add_attrs(evlist, attrs, nr_attrs); |
79695e1b ACM |
271 | } |
272 | ||
32dcd021 | 273 | struct evsel * |
63503dba | 274 | perf_evlist__find_tracepoint_by_id(struct evlist *evlist, int id) |
ee29be62 | 275 | { |
32dcd021 | 276 | struct evsel *evsel; |
ee29be62 | 277 | |
e5cadb93 | 278 | evlist__for_each_entry(evlist, evsel) { |
1fc632ce JO |
279 | if (evsel->core.attr.type == PERF_TYPE_TRACEPOINT && |
280 | (int)evsel->core.attr.config == id) | |
ee29be62 ACM |
281 | return evsel; |
282 | } | |
283 | ||
284 | return NULL; | |
285 | } | |
286 | ||
32dcd021 | 287 | struct evsel * |
63503dba | 288 | perf_evlist__find_tracepoint_by_name(struct evlist *evlist, |
a2f2804a DA |
289 | const char *name) |
290 | { | |
32dcd021 | 291 | struct evsel *evsel; |
a2f2804a | 292 | |
e5cadb93 | 293 | evlist__for_each_entry(evlist, evsel) { |
1fc632ce | 294 | if ((evsel->core.attr.type == PERF_TYPE_TRACEPOINT) && |
a2f2804a DA |
295 | (strcmp(evsel->name, name) == 0)) |
296 | return evsel; | |
297 | } | |
298 | ||
299 | return NULL; | |
300 | } | |
301 | ||
63503dba | 302 | int perf_evlist__add_newtp(struct evlist *evlist, |
39876e7d ACM |
303 | const char *sys, const char *name, void *handler) |
304 | { | |
32dcd021 | 305 | struct evsel *evsel = perf_evsel__newtp(sys, name); |
39876e7d | 306 | |
8dd2a131 | 307 | if (IS_ERR(evsel)) |
39876e7d ACM |
308 | return -1; |
309 | ||
744a9719 | 310 | evsel->handler = handler; |
a1cf3a75 | 311 | evlist__add(evlist, evsel); |
39876e7d ACM |
312 | return 0; |
313 | } | |
314 | ||
63503dba | 315 | static int perf_evlist__nr_threads(struct evlist *evlist, |
32dcd021 | 316 | struct evsel *evsel) |
bf8e8f4b | 317 | { |
648b5af3 | 318 | if (evsel->core.system_wide) |
bf8e8f4b AH |
319 | return 1; |
320 | else | |
a2f354e3 | 321 | return perf_thread_map__nr(evlist->core.threads); |
bf8e8f4b AH |
322 | } |
323 | ||
e74676de | 324 | void evlist__disable(struct evlist *evlist) |
4152ab37 | 325 | { |
32dcd021 | 326 | struct evsel *pos; |
3e27c920 | 327 | |
e5cadb93 | 328 | evlist__for_each_entry(evlist, pos) { |
9dfcb759 | 329 | if (pos->disabled || !perf_evsel__is_group_leader(pos) || !pos->core.fd) |
3e27c920 | 330 | continue; |
9a10bb22 | 331 | evsel__disable(pos); |
4152ab37 | 332 | } |
2b56bcfb ACM |
333 | |
334 | evlist->enabled = false; | |
4152ab37 ACM |
335 | } |
336 | ||
1c87f165 | 337 | void evlist__enable(struct evlist *evlist) |
764e16a3 | 338 | { |
32dcd021 | 339 | struct evsel *pos; |
3e27c920 | 340 | |
e5cadb93 | 341 | evlist__for_each_entry(evlist, pos) { |
9dfcb759 | 342 | if (!perf_evsel__is_group_leader(pos) || !pos->core.fd) |
3e27c920 | 343 | continue; |
ec7f24ef | 344 | evsel__enable(pos); |
764e16a3 | 345 | } |
2b56bcfb ACM |
346 | |
347 | evlist->enabled = true; | |
348 | } | |
349 | ||
63503dba | 350 | void perf_evlist__toggle_enable(struct evlist *evlist) |
2b56bcfb | 351 | { |
e74676de | 352 | (evlist->enabled ? evlist__disable : evlist__enable)(evlist); |
764e16a3 DA |
353 | } |
354 | ||
63503dba | 355 | static int perf_evlist__enable_event_cpu(struct evlist *evlist, |
32dcd021 | 356 | struct evsel *evsel, int cpu) |
1c65056c | 357 | { |
18ef15c6 | 358 | int thread; |
1c65056c AH |
359 | int nr_threads = perf_evlist__nr_threads(evlist, evsel); |
360 | ||
9dfcb759 | 361 | if (!evsel->core.fd) |
1c65056c AH |
362 | return -EINVAL; |
363 | ||
364 | for (thread = 0; thread < nr_threads; thread++) { | |
18ef15c6 | 365 | int err = ioctl(FD(evsel, cpu, thread), PERF_EVENT_IOC_ENABLE, 0); |
1c65056c AH |
366 | if (err) |
367 | return err; | |
368 | } | |
369 | return 0; | |
370 | } | |
371 | ||
63503dba | 372 | static int perf_evlist__enable_event_thread(struct evlist *evlist, |
32dcd021 | 373 | struct evsel *evsel, |
1c65056c AH |
374 | int thread) |
375 | { | |
18ef15c6 | 376 | int cpu; |
6549cd8f | 377 | int nr_cpus = perf_cpu_map__nr(evlist->core.cpus); |
1c65056c | 378 | |
9dfcb759 | 379 | if (!evsel->core.fd) |
1c65056c AH |
380 | return -EINVAL; |
381 | ||
382 | for (cpu = 0; cpu < nr_cpus; cpu++) { | |
18ef15c6 | 383 | int err = ioctl(FD(evsel, cpu, thread), PERF_EVENT_IOC_ENABLE, 0); |
1c65056c AH |
384 | if (err) |
385 | return err; | |
386 | } | |
387 | return 0; | |
388 | } | |
389 | ||
63503dba | 390 | int perf_evlist__enable_event_idx(struct evlist *evlist, |
32dcd021 | 391 | struct evsel *evsel, int idx) |
1c65056c | 392 | { |
315c0a1f | 393 | bool per_cpu_mmaps = !perf_cpu_map__empty(evlist->core.cpus); |
1c65056c AH |
394 | |
395 | if (per_cpu_mmaps) | |
396 | return perf_evlist__enable_event_cpu(evlist, evsel, idx); | |
397 | else | |
398 | return perf_evlist__enable_event_thread(evlist, evsel, idx); | |
399 | } | |
400 | ||
63503dba | 401 | int perf_evlist__alloc_pollfd(struct evlist *evlist) |
5c581041 | 402 | { |
6549cd8f | 403 | int nr_cpus = perf_cpu_map__nr(evlist->core.cpus); |
a2f354e3 | 404 | int nr_threads = perf_thread_map__nr(evlist->core.threads); |
bf8e8f4b | 405 | int nfds = 0; |
32dcd021 | 406 | struct evsel *evsel; |
bf8e8f4b | 407 | |
e5cadb93 | 408 | evlist__for_each_entry(evlist, evsel) { |
648b5af3 | 409 | if (evsel->core.system_wide) |
bf8e8f4b AH |
410 | nfds += nr_cpus; |
411 | else | |
412 | nfds += nr_cpus * nr_threads; | |
413 | } | |
414 | ||
40cb2d51 JO |
415 | if (fdarray__available_entries(&evlist->core.pollfd) < nfds && |
416 | fdarray__grow(&evlist->core.pollfd, nfds) < 0) | |
ad6765dd ACM |
417 | return -ENOMEM; |
418 | ||
419 | return 0; | |
5c581041 | 420 | } |
70082dd9 | 421 | |
63503dba | 422 | static int __perf_evlist__add_pollfd(struct evlist *evlist, int fd, |
a5830532 | 423 | struct mmap *map, short revent) |
e4b356b5 | 424 | { |
40cb2d51 | 425 | int pos = fdarray__add(&evlist->core.pollfd, fd, revent | POLLERR | POLLHUP); |
e4b356b5 ACM |
426 | /* |
427 | * Save the idx so that when we filter out fds POLLHUP'ed we can | |
428 | * close the associated evlist->mmap[] entry. | |
429 | */ | |
430 | if (pos >= 0) { | |
40cb2d51 | 431 | evlist->core.pollfd.priv[pos].ptr = map; |
e4b356b5 ACM |
432 | |
433 | fcntl(fd, F_SETFL, O_NONBLOCK); | |
434 | } | |
435 | ||
436 | return pos; | |
437 | } | |
438 | ||
63503dba | 439 | int perf_evlist__add_pollfd(struct evlist *evlist, int fd) |
70082dd9 | 440 | { |
4876075b | 441 | return __perf_evlist__add_pollfd(evlist, fd, NULL, POLLIN); |
e4b356b5 ACM |
442 | } |
443 | ||
258e4bfc WN |
444 | static void perf_evlist__munmap_filtered(struct fdarray *fda, int fd, |
445 | void *arg __maybe_unused) | |
e4b356b5 | 446 | { |
a5830532 | 447 | struct mmap *map = fda->priv[fd].ptr; |
1b85337d | 448 | |
4876075b WN |
449 | if (map) |
450 | perf_mmap__put(map); | |
70082dd9 | 451 | } |
70db7533 | 452 | |
63503dba | 453 | int perf_evlist__filter_pollfd(struct evlist *evlist, short revents_and_mask) |
1ddec7f0 | 454 | { |
40cb2d51 | 455 | return fdarray__filter(&evlist->core.pollfd, revents_and_mask, |
258e4bfc | 456 | perf_evlist__munmap_filtered, NULL); |
1ddec7f0 ACM |
457 | } |
458 | ||
63503dba | 459 | int perf_evlist__poll(struct evlist *evlist, int timeout) |
f66a889d | 460 | { |
40cb2d51 | 461 | return fdarray__poll(&evlist->core.pollfd, timeout); |
f66a889d ACM |
462 | } |
463 | ||
63503dba | 464 | static void perf_evlist__set_sid_idx(struct evlist *evlist, |
32dcd021 | 465 | struct evsel *evsel, int idx, int cpu, |
3c659eed AH |
466 | int thread) |
467 | { | |
468 | struct perf_sample_id *sid = SID(evsel, cpu, thread); | |
469 | sid->idx = idx; | |
f72f901d JO |
470 | if (evlist->core.cpus && cpu >= 0) |
471 | sid->cpu = evlist->core.cpus->map[cpu]; | |
3c659eed AH |
472 | else |
473 | sid->cpu = -1; | |
648b5af3 | 474 | if (!evsel->core.system_wide && evlist->core.threads && thread >= 0) |
a2f354e3 | 475 | sid->tid = perf_thread_map__pid(evlist->core.threads, thread); |
3c659eed AH |
476 | else |
477 | sid->tid = -1; | |
478 | } | |
479 | ||
63503dba | 480 | struct perf_sample_id *perf_evlist__id2sid(struct evlist *evlist, u64 id) |
70db7533 ACM |
481 | { |
482 | struct hlist_head *head; | |
70db7533 ACM |
483 | struct perf_sample_id *sid; |
484 | int hash; | |
485 | ||
70db7533 | 486 | hash = hash_64(id, PERF_EVLIST__HLIST_BITS); |
1d5af02d | 487 | head = &evlist->core.heads[hash]; |
70db7533 | 488 | |
b67bfe0d | 489 | hlist_for_each_entry(sid, head, node) |
70db7533 | 490 | if (sid->id == id) |
932a3594 JO |
491 | return sid; |
492 | ||
493 | return NULL; | |
494 | } | |
495 | ||
63503dba | 496 | struct evsel *perf_evlist__id2evsel(struct evlist *evlist, u64 id) |
932a3594 JO |
497 | { |
498 | struct perf_sample_id *sid; | |
499 | ||
6484d2f9 | 500 | if (evlist->core.nr_entries == 1 || !id) |
515dbe48 | 501 | return evlist__first(evlist); |
932a3594 JO |
502 | |
503 | sid = perf_evlist__id2sid(evlist, id); | |
504 | if (sid) | |
70c20369 | 505 | return container_of(sid->evsel, struct evsel, core); |
30e68bcc NK |
506 | |
507 | if (!perf_evlist__sample_id_all(evlist)) | |
515dbe48 | 508 | return evlist__first(evlist); |
30e68bcc | 509 | |
70db7533 ACM |
510 | return NULL; |
511 | } | |
04391deb | 512 | |
63503dba | 513 | struct evsel *perf_evlist__id2evsel_strict(struct evlist *evlist, |
dddcf6ab AH |
514 | u64 id) |
515 | { | |
516 | struct perf_sample_id *sid; | |
517 | ||
518 | if (!id) | |
519 | return NULL; | |
520 | ||
521 | sid = perf_evlist__id2sid(evlist, id); | |
522 | if (sid) | |
70c20369 | 523 | return container_of(sid->evsel, struct evsel, core); |
dddcf6ab AH |
524 | |
525 | return NULL; | |
526 | } | |
527 | ||
63503dba | 528 | static int perf_evlist__event2id(struct evlist *evlist, |
75562573 AH |
529 | union perf_event *event, u64 *id) |
530 | { | |
b1fcd190 | 531 | const __u64 *array = event->sample.array; |
75562573 AH |
532 | ssize_t n; |
533 | ||
534 | n = (event->header.size - sizeof(event->header)) >> 3; | |
535 | ||
536 | if (event->header.type == PERF_RECORD_SAMPLE) { | |
537 | if (evlist->id_pos >= n) | |
538 | return -1; | |
539 | *id = array[evlist->id_pos]; | |
540 | } else { | |
541 | if (evlist->is_pos > n) | |
542 | return -1; | |
543 | n -= evlist->is_pos; | |
544 | *id = array[n]; | |
545 | } | |
546 | return 0; | |
547 | } | |
548 | ||
63503dba | 549 | struct evsel *perf_evlist__event2evsel(struct evlist *evlist, |
7cb5c5ac | 550 | union perf_event *event) |
75562573 | 551 | { |
515dbe48 | 552 | struct evsel *first = evlist__first(evlist); |
75562573 AH |
553 | struct hlist_head *head; |
554 | struct perf_sample_id *sid; | |
555 | int hash; | |
556 | u64 id; | |
557 | ||
6484d2f9 | 558 | if (evlist->core.nr_entries == 1) |
98be6966 AH |
559 | return first; |
560 | ||
1fc632ce | 561 | if (!first->core.attr.sample_id_all && |
98be6966 AH |
562 | event->header.type != PERF_RECORD_SAMPLE) |
563 | return first; | |
75562573 AH |
564 | |
565 | if (perf_evlist__event2id(evlist, event, &id)) | |
566 | return NULL; | |
567 | ||
568 | /* Synthesized events have an id of zero */ | |
569 | if (!id) | |
98be6966 | 570 | return first; |
75562573 AH |
571 | |
572 | hash = hash_64(id, PERF_EVLIST__HLIST_BITS); | |
1d5af02d | 573 | head = &evlist->core.heads[hash]; |
75562573 AH |
574 | |
575 | hlist_for_each_entry(sid, head, node) { | |
576 | if (sid->id == id) | |
70c20369 | 577 | return container_of(sid->evsel, struct evsel, core); |
75562573 AH |
578 | } |
579 | return NULL; | |
580 | } | |
581 | ||
63503dba | 582 | static int perf_evlist__set_paused(struct evlist *evlist, bool value) |
65aea233 WN |
583 | { |
584 | int i; | |
585 | ||
0b72d69a | 586 | if (!evlist->overwrite_mmap) |
078c3386 WN |
587 | return 0; |
588 | ||
c976ee11 | 589 | for (i = 0; i < evlist->core.nr_mmaps; i++) { |
2cf07b29 | 590 | int fd = evlist->overwrite_mmap[i].core.fd; |
65aea233 WN |
591 | int err; |
592 | ||
593 | if (fd < 0) | |
594 | continue; | |
595 | err = ioctl(fd, PERF_EVENT_IOC_PAUSE_OUTPUT, value ? 1 : 0); | |
596 | if (err) | |
597 | return err; | |
598 | } | |
599 | return 0; | |
600 | } | |
601 | ||
63503dba | 602 | static int perf_evlist__pause(struct evlist *evlist) |
65aea233 WN |
603 | { |
604 | return perf_evlist__set_paused(evlist, true); | |
605 | } | |
606 | ||
63503dba | 607 | static int perf_evlist__resume(struct evlist *evlist) |
65aea233 WN |
608 | { |
609 | return perf_evlist__set_paused(evlist, false); | |
610 | } | |
611 | ||
db6b7b13 | 612 | static void evlist__munmap_nofree(struct evlist *evlist) |
f8a95309 | 613 | { |
aece948f | 614 | int i; |
f8a95309 | 615 | |
b2cb615d | 616 | if (evlist->mmap) |
c976ee11 | 617 | for (i = 0; i < evlist->core.nr_mmaps; i++) |
b2cb615d | 618 | perf_mmap__munmap(&evlist->mmap[i]); |
983874d1 | 619 | |
0b72d69a | 620 | if (evlist->overwrite_mmap) |
c976ee11 | 621 | for (i = 0; i < evlist->core.nr_mmaps; i++) |
0b72d69a | 622 | perf_mmap__munmap(&evlist->overwrite_mmap[i]); |
a1f72618 | 623 | } |
aece948f | 624 | |
db6b7b13 | 625 | void evlist__munmap(struct evlist *evlist) |
a1f72618 | 626 | { |
db6b7b13 | 627 | evlist__munmap_nofree(evlist); |
04662523 | 628 | zfree(&evlist->mmap); |
0b72d69a | 629 | zfree(&evlist->overwrite_mmap); |
f8a95309 ACM |
630 | } |
631 | ||
d50cf361 JO |
632 | static struct mmap *evlist__alloc_mmap(struct evlist *evlist, |
633 | bool overwrite) | |
f8a95309 | 634 | { |
d4c6fb36 | 635 | int i; |
a5830532 | 636 | struct mmap *map; |
d4c6fb36 | 637 | |
c976ee11 | 638 | evlist->core.nr_mmaps = perf_cpu_map__nr(evlist->core.cpus); |
315c0a1f | 639 | if (perf_cpu_map__empty(evlist->core.cpus)) |
c976ee11 JO |
640 | evlist->core.nr_mmaps = perf_thread_map__nr(evlist->core.threads); |
641 | map = zalloc(evlist->core.nr_mmaps * sizeof(struct mmap)); | |
8db6d6b1 WN |
642 | if (!map) |
643 | return NULL; | |
946ae1d4 | 644 | |
c976ee11 | 645 | for (i = 0; i < evlist->core.nr_mmaps; i++) { |
2cf07b29 | 646 | map[i].core.fd = -1; |
8df7a869 | 647 | map[i].core.overwrite = overwrite; |
4738ca30 ACM |
648 | /* |
649 | * When the perf_mmap() call is made we grab one refcount, plus | |
6afad54d | 650 | * one extra to let perf_mmap__consume() get the last |
4738ca30 ACM |
651 | * events after all real references (perf_mmap__get()) are |
652 | * dropped. | |
653 | * | |
654 | * Each PERF_EVENT_IOC_SET_OUTPUT points to this mmap and | |
655 | * thus does perf_mmap__get() on it. | |
656 | */ | |
e03edfea | 657 | refcount_set(&map[i].core.refcnt, 0); |
4738ca30 | 658 | } |
8db6d6b1 | 659 | return map; |
f8a95309 ACM |
660 | } |
661 | ||
f3058a1c | 662 | static bool |
63503dba | 663 | perf_evlist__should_poll(struct evlist *evlist __maybe_unused, |
32dcd021 | 664 | struct evsel *evsel) |
f3058a1c | 665 | { |
1fc632ce | 666 | if (evsel->core.attr.write_backward) |
f3058a1c WN |
667 | return false; |
668 | return true; | |
669 | } | |
670 | ||
9521b5f2 | 671 | static int evlist__mmap_per_evsel(struct evlist *evlist, int idx, |
9f21b815 | 672 | struct mmap_params *mp, int cpu_idx, |
0b72d69a | 673 | int thread, int *_output, int *_output_overwrite) |
aece948f | 674 | { |
32dcd021 | 675 | struct evsel *evsel; |
f3058a1c | 676 | int revent; |
f72f901d | 677 | int evlist_cpu = cpu_map__cpu(evlist->core.cpus, cpu_idx); |
04e21314 | 678 | |
e5cadb93 | 679 | evlist__for_each_entry(evlist, evsel) { |
a5830532 | 680 | struct mmap *maps = evlist->mmap; |
078c3386 | 681 | int *output = _output; |
bf8e8f4b | 682 | int fd; |
9f21b815 | 683 | int cpu; |
bf8e8f4b | 684 | |
71f566a3 | 685 | mp->prot = PROT_READ | PROT_WRITE; |
1fc632ce | 686 | if (evsel->core.attr.write_backward) { |
0b72d69a WN |
687 | output = _output_overwrite; |
688 | maps = evlist->overwrite_mmap; | |
078c3386 WN |
689 | |
690 | if (!maps) { | |
d50cf361 | 691 | maps = evlist__alloc_mmap(evlist, true); |
078c3386 WN |
692 | if (!maps) |
693 | return -1; | |
0b72d69a | 694 | evlist->overwrite_mmap = maps; |
54cc54de WN |
695 | if (evlist->bkw_mmap_state == BKW_MMAP_NOTREADY) |
696 | perf_evlist__toggle_bkw_mmap(evlist, BKW_MMAP_RUNNING); | |
078c3386 | 697 | } |
71f566a3 | 698 | mp->prot &= ~PROT_WRITE; |
078c3386 | 699 | } |
f3058a1c | 700 | |
648b5af3 | 701 | if (evsel->core.system_wide && thread) |
bf8e8f4b AH |
702 | continue; |
703 | ||
b4df75de | 704 | cpu = perf_cpu_map__idx(evsel->core.cpus, evlist_cpu); |
9f21b815 MR |
705 | if (cpu == -1) |
706 | continue; | |
707 | ||
bf8e8f4b | 708 | fd = FD(evsel, cpu, thread); |
04e21314 AH |
709 | |
710 | if (*output == -1) { | |
711 | *output = fd; | |
078c3386 | 712 | |
31fb4c0d | 713 | if (perf_mmap__mmap(&maps[idx], mp, *output, evlist_cpu) < 0) |
04e21314 AH |
714 | return -1; |
715 | } else { | |
716 | if (ioctl(fd, PERF_EVENT_IOC_SET_OUTPUT, *output) != 0) | |
717 | return -1; | |
82396986 | 718 | |
078c3386 | 719 | perf_mmap__get(&maps[idx]); |
04e21314 AH |
720 | } |
721 | ||
f3058a1c WN |
722 | revent = perf_evlist__should_poll(evlist, evsel) ? POLLIN : 0; |
723 | ||
f90d194a AH |
724 | /* |
725 | * The system_wide flag causes a selected event to be opened | |
726 | * always without a pid. Consequently it will never get a | |
727 | * POLLHUP, but it is used for tracking in combination with | |
728 | * other events, so it should not need to be polled anyway. | |
729 | * Therefore don't add it for polling. | |
730 | */ | |
648b5af3 | 731 | if (!evsel->core.system_wide && |
078c3386 WN |
732 | __perf_evlist__add_pollfd(evlist, fd, &maps[idx], revent) < 0) { |
733 | perf_mmap__put(&maps[idx]); | |
ad6765dd | 734 | return -1; |
82396986 | 735 | } |
033fa713 | 736 | |
1fc632ce | 737 | if (evsel->core.attr.read_format & PERF_FORMAT_ID) { |
d5a99483 | 738 | if (perf_evlist__id_add_fd(&evlist->core, &evsel->core, cpu, thread, |
3c659eed AH |
739 | fd) < 0) |
740 | return -1; | |
741 | perf_evlist__set_sid_idx(evlist, evsel, idx, cpu, | |
742 | thread); | |
743 | } | |
04e21314 AH |
744 | } |
745 | ||
746 | return 0; | |
747 | } | |
748 | ||
9521b5f2 | 749 | static int evlist__mmap_per_cpu(struct evlist *evlist, |
a8a8f3eb | 750 | struct mmap_params *mp) |
04e21314 | 751 | { |
aece948f | 752 | int cpu, thread; |
6549cd8f | 753 | int nr_cpus = perf_cpu_map__nr(evlist->core.cpus); |
a2f354e3 | 754 | int nr_threads = perf_thread_map__nr(evlist->core.threads); |
aece948f | 755 | |
e3e1a54f | 756 | pr_debug2("perf event ring buffer mmapped per cpu\n"); |
b3a319d5 | 757 | for (cpu = 0; cpu < nr_cpus; cpu++) { |
aece948f | 758 | int output = -1; |
0b72d69a | 759 | int output_overwrite = -1; |
aece948f | 760 | |
718c602d AH |
761 | auxtrace_mmap_params__set_idx(&mp->auxtrace_mp, evlist, cpu, |
762 | true); | |
763 | ||
b3a319d5 | 764 | for (thread = 0; thread < nr_threads; thread++) { |
9521b5f2 | 765 | if (evlist__mmap_per_evsel(evlist, cpu, mp, cpu, |
0b72d69a | 766 | thread, &output, &output_overwrite)) |
04e21314 | 767 | goto out_unmap; |
aece948f ACM |
768 | } |
769 | } | |
770 | ||
771 | return 0; | |
772 | ||
773 | out_unmap: | |
db6b7b13 | 774 | evlist__munmap_nofree(evlist); |
aece948f ACM |
775 | return -1; |
776 | } | |
777 | ||
9521b5f2 | 778 | static int evlist__mmap_per_thread(struct evlist *evlist, |
a8a8f3eb | 779 | struct mmap_params *mp) |
aece948f | 780 | { |
aece948f | 781 | int thread; |
a2f354e3 | 782 | int nr_threads = perf_thread_map__nr(evlist->core.threads); |
aece948f | 783 | |
e3e1a54f | 784 | pr_debug2("perf event ring buffer mmapped per thread\n"); |
b3a319d5 | 785 | for (thread = 0; thread < nr_threads; thread++) { |
aece948f | 786 | int output = -1; |
0b72d69a | 787 | int output_overwrite = -1; |
aece948f | 788 | |
718c602d AH |
789 | auxtrace_mmap_params__set_idx(&mp->auxtrace_mp, evlist, thread, |
790 | false); | |
791 | ||
9521b5f2 | 792 | if (evlist__mmap_per_evsel(evlist, thread, mp, 0, thread, |
0b72d69a | 793 | &output, &output_overwrite)) |
04e21314 | 794 | goto out_unmap; |
aece948f ACM |
795 | } |
796 | ||
797 | return 0; | |
798 | ||
799 | out_unmap: | |
db6b7b13 | 800 | evlist__munmap_nofree(evlist); |
aece948f ACM |
801 | return -1; |
802 | } | |
803 | ||
f5e7150c | 804 | unsigned long perf_event_mlock_kb_in_pages(void) |
994a1f78 | 805 | { |
f5e7150c ACM |
806 | unsigned long pages; |
807 | int max; | |
8185e881 | 808 | |
f5e7150c ACM |
809 | if (sysctl__read_int("kernel/perf_event_mlock_kb", &max) < 0) { |
810 | /* | |
811 | * Pick a once upon a time good value, i.e. things look | |
812 | * strange since we can't read a sysctl value, but lets not | |
813 | * die yet... | |
814 | */ | |
815 | max = 512; | |
816 | } else { | |
817 | max -= (page_size / 1024); | |
818 | } | |
8185e881 | 819 | |
f5e7150c ACM |
820 | pages = (max * 1024) / page_size; |
821 | if (!is_power_of_2(pages)) | |
822 | pages = rounddown_pow_of_two(pages); | |
823 | ||
824 | return pages; | |
825 | } | |
826 | ||
9521b5f2 | 827 | size_t evlist__mmap_size(unsigned long pages) |
f5e7150c ACM |
828 | { |
829 | if (pages == UINT_MAX) | |
830 | pages = perf_event_mlock_kb_in_pages(); | |
831 | else if (!is_power_of_2(pages)) | |
994a1f78 JO |
832 | return 0; |
833 | ||
834 | return (pages + 1) * page_size; | |
835 | } | |
836 | ||
33c2dcfd DA |
837 | static long parse_pages_arg(const char *str, unsigned long min, |
838 | unsigned long max) | |
994a1f78 | 839 | { |
2fbe4abe | 840 | unsigned long pages, val; |
27050f53 JO |
841 | static struct parse_tag tags[] = { |
842 | { .tag = 'B', .mult = 1 }, | |
843 | { .tag = 'K', .mult = 1 << 10 }, | |
844 | { .tag = 'M', .mult = 1 << 20 }, | |
845 | { .tag = 'G', .mult = 1 << 30 }, | |
846 | { .tag = 0 }, | |
847 | }; | |
994a1f78 | 848 | |
8973504b | 849 | if (str == NULL) |
33c2dcfd | 850 | return -EINVAL; |
8973504b | 851 | |
27050f53 | 852 | val = parse_tag_value(str, tags); |
2fbe4abe | 853 | if (val != (unsigned long) -1) { |
27050f53 JO |
854 | /* we got file size value */ |
855 | pages = PERF_ALIGN(val, page_size) / page_size; | |
27050f53 JO |
856 | } else { |
857 | /* we got pages count value */ | |
858 | char *eptr; | |
859 | pages = strtoul(str, &eptr, 10); | |
33c2dcfd DA |
860 | if (*eptr != '\0') |
861 | return -EINVAL; | |
994a1f78 JO |
862 | } |
863 | ||
2bcab6c1 | 864 | if (pages == 0 && min == 0) { |
33c2dcfd | 865 | /* leave number of pages at 0 */ |
1dbfa938 | 866 | } else if (!is_power_of_2(pages)) { |
9808143b JO |
867 | char buf[100]; |
868 | ||
33c2dcfd | 869 | /* round pages up to next power of 2 */ |
91529834 | 870 | pages = roundup_pow_of_two(pages); |
1dbfa938 AH |
871 | if (!pages) |
872 | return -EINVAL; | |
9808143b JO |
873 | |
874 | unit_number__scnprintf(buf, sizeof(buf), pages * page_size); | |
875 | pr_info("rounding mmap pages size to %s (%lu pages)\n", | |
876 | buf, pages); | |
2fbe4abe AH |
877 | } |
878 | ||
33c2dcfd DA |
879 | if (pages > max) |
880 | return -EINVAL; | |
881 | ||
882 | return pages; | |
883 | } | |
884 | ||
e9db1310 | 885 | int __perf_evlist__parse_mmap_pages(unsigned int *mmap_pages, const char *str) |
33c2dcfd | 886 | { |
33c2dcfd DA |
887 | unsigned long max = UINT_MAX; |
888 | long pages; | |
889 | ||
f5ae9c42 | 890 | if (max > SIZE_MAX / page_size) |
33c2dcfd DA |
891 | max = SIZE_MAX / page_size; |
892 | ||
893 | pages = parse_pages_arg(str, 1, max); | |
894 | if (pages < 0) { | |
895 | pr_err("Invalid argument for --mmap_pages/-m\n"); | |
994a1f78 JO |
896 | return -1; |
897 | } | |
898 | ||
899 | *mmap_pages = pages; | |
900 | return 0; | |
901 | } | |
902 | ||
e9db1310 AH |
903 | int perf_evlist__parse_mmap_pages(const struct option *opt, const char *str, |
904 | int unset __maybe_unused) | |
905 | { | |
906 | return __perf_evlist__parse_mmap_pages(opt->value, str); | |
907 | } | |
908 | ||
c83fa7f2 | 909 | /** |
9521b5f2 | 910 | * evlist__mmap_ex - Create mmaps to receive events. |
c83fa7f2 AH |
911 | * @evlist: list of events |
912 | * @pages: map length in pages | |
913 | * @overwrite: overwrite older events? | |
718c602d AH |
914 | * @auxtrace_pages - auxtrace map length in pages |
915 | * @auxtrace_overwrite - overwrite older auxtrace data? | |
f8a95309 | 916 | * |
c83fa7f2 | 917 | * If @overwrite is %false the user needs to signal event consumption using |
9521b5f2 | 918 | * perf_mmap__write_tail(). Using evlist__mmap_read() does this |
c83fa7f2 | 919 | * automatically. |
7e2ed097 | 920 | * |
718c602d AH |
921 | * Similarly, if @auxtrace_overwrite is %false the user needs to signal data |
922 | * consumption using auxtrace_mmap__write_tail(). | |
923 | * | |
c83fa7f2 | 924 | * Return: %0 on success, negative error code otherwise. |
f8a95309 | 925 | */ |
9521b5f2 | 926 | int evlist__mmap_ex(struct evlist *evlist, unsigned int pages, |
7a276ff6 | 927 | unsigned int auxtrace_pages, |
51255a8a AB |
928 | bool auxtrace_overwrite, int nr_cblocks, int affinity, int flush, |
929 | int comp_level) | |
f8a95309 | 930 | { |
32dcd021 | 931 | struct evsel *evsel; |
f72f901d | 932 | const struct perf_cpu_map *cpus = evlist->core.cpus; |
03617c22 | 933 | const struct perf_thread_map *threads = evlist->core.threads; |
71f566a3 WN |
934 | /* |
935 | * Delay setting mp.prot: set it before calling perf_mmap__mmap. | |
936 | * Its value is decided by evsel's write_backward. | |
937 | * So &mp should not be passed through const pointer. | |
938 | */ | |
51255a8a AB |
939 | struct mmap_params mp = { .nr_cblocks = nr_cblocks, .affinity = affinity, .flush = flush, |
940 | .comp_level = comp_level }; | |
50a682ce | 941 | |
8db6d6b1 | 942 | if (!evlist->mmap) |
d50cf361 | 943 | evlist->mmap = evlist__alloc_mmap(evlist, false); |
8db6d6b1 | 944 | if (!evlist->mmap) |
f8a95309 ACM |
945 | return -ENOMEM; |
946 | ||
40cb2d51 | 947 | if (evlist->core.pollfd.entries == NULL && perf_evlist__alloc_pollfd(evlist) < 0) |
f8a95309 ACM |
948 | return -ENOMEM; |
949 | ||
f6fa4375 JO |
950 | evlist->core.mmap_len = evlist__mmap_size(pages); |
951 | pr_debug("mmap size %zuB\n", evlist->core.mmap_len); | |
952 | mp.mask = evlist->core.mmap_len - page_size - 1; | |
f8a95309 | 953 | |
f6fa4375 | 954 | auxtrace_mmap_params__init(&mp.auxtrace_mp, evlist->core.mmap_len, |
718c602d AH |
955 | auxtrace_pages, auxtrace_overwrite); |
956 | ||
e5cadb93 | 957 | evlist__for_each_entry(evlist, evsel) { |
1fc632ce | 958 | if ((evsel->core.attr.read_format & PERF_FORMAT_ID) && |
8cd36f3e | 959 | evsel->core.sample_id == NULL && |
70c20369 | 960 | perf_evsel__alloc_id(&evsel->core, perf_cpu_map__nr(cpus), threads->nr) < 0) |
f8a95309 | 961 | return -ENOMEM; |
f8a95309 ACM |
962 | } |
963 | ||
315c0a1f | 964 | if (perf_cpu_map__empty(cpus)) |
9521b5f2 | 965 | return evlist__mmap_per_thread(evlist, &mp); |
f8a95309 | 966 | |
9521b5f2 | 967 | return evlist__mmap_per_cpu(evlist, &mp); |
f8a95309 | 968 | } |
7e2ed097 | 969 | |
9521b5f2 | 970 | int evlist__mmap(struct evlist *evlist, unsigned int pages) |
718c602d | 971 | { |
9521b5f2 | 972 | return evlist__mmap_ex(evlist, pages, 0, false, 0, PERF_AFFINITY_SYS, 1, 0); |
718c602d AH |
973 | } |
974 | ||
63503dba | 975 | int perf_evlist__create_maps(struct evlist *evlist, struct target *target) |
7e2ed097 | 976 | { |
147c508f | 977 | bool all_threads = (target->per_thread && target->system_wide); |
f854839b | 978 | struct perf_cpu_map *cpus; |
9749b90e | 979 | struct perf_thread_map *threads; |
7e2ed097 | 980 | |
147c508f JY |
981 | /* |
982 | * If specify '-a' and '--per-thread' to perf record, perf record | |
983 | * will override '--per-thread'. target->per_thread = false and | |
984 | * target->system_wide = true. | |
985 | * | |
986 | * If specify '--per-thread' only to perf record, | |
987 | * target->per_thread = true and target->system_wide = false. | |
988 | * | |
989 | * So target->per_thread && target->system_wide is false. | |
990 | * For perf record, thread_map__new_str doesn't call | |
991 | * thread_map__new_all_cpus. That will keep perf record's | |
992 | * current behavior. | |
993 | * | |
994 | * For perf stat, it allows the case that target->per_thread and | |
995 | * target->system_wide are all true. It means to collect system-wide | |
996 | * per-thread data. thread_map__new_str will call | |
997 | * thread_map__new_all_cpus to enumerate all threads. | |
998 | */ | |
73c0ca1e | 999 | threads = thread_map__new_str(target->pid, target->tid, target->uid, |
147c508f | 1000 | all_threads); |
7e2ed097 | 1001 | |
74bfd2b2 | 1002 | if (!threads) |
7e2ed097 ACM |
1003 | return -1; |
1004 | ||
9c105fbc | 1005 | if (target__uses_dummy_map(target)) |
397721e0 | 1006 | cpus = perf_cpu_map__dummy_new(); |
879d77d0 | 1007 | else |
9c3516d1 | 1008 | cpus = perf_cpu_map__new(target->cpu_list); |
7e2ed097 | 1009 | |
74bfd2b2 | 1010 | if (!cpus) |
7e2ed097 ACM |
1011 | goto out_delete_threads; |
1012 | ||
ec903f26 | 1013 | evlist->core.has_user_cpus = !!target->cpu_list; |
ec9a77a7 | 1014 | |
453fa030 | 1015 | perf_evlist__set_maps(&evlist->core, cpus, threads); |
d5bc056e AH |
1016 | |
1017 | return 0; | |
7e2ed097 ACM |
1018 | |
1019 | out_delete_threads: | |
7836e52e | 1020 | perf_thread_map__put(threads); |
7e2ed097 ACM |
1021 | return -1; |
1022 | } | |
1023 | ||
63503dba | 1024 | void __perf_evlist__set_sample_bit(struct evlist *evlist, |
22c8a376 ACM |
1025 | enum perf_event_sample_format bit) |
1026 | { | |
32dcd021 | 1027 | struct evsel *evsel; |
22c8a376 | 1028 | |
e5cadb93 | 1029 | evlist__for_each_entry(evlist, evsel) |
22c8a376 ACM |
1030 | __perf_evsel__set_sample_bit(evsel, bit); |
1031 | } | |
1032 | ||
63503dba | 1033 | void __perf_evlist__reset_sample_bit(struct evlist *evlist, |
22c8a376 ACM |
1034 | enum perf_event_sample_format bit) |
1035 | { | |
32dcd021 | 1036 | struct evsel *evsel; |
22c8a376 | 1037 | |
e5cadb93 | 1038 | evlist__for_each_entry(evlist, evsel) |
22c8a376 ACM |
1039 | __perf_evsel__reset_sample_bit(evsel, bit); |
1040 | } | |
1041 | ||
63503dba | 1042 | int perf_evlist__apply_filters(struct evlist *evlist, struct evsel **err_evsel) |
0a102479 | 1043 | { |
32dcd021 | 1044 | struct evsel *evsel; |
745cefc5 | 1045 | int err = 0; |
0a102479 | 1046 | |
e5cadb93 | 1047 | evlist__for_each_entry(evlist, evsel) { |
745cefc5 | 1048 | if (evsel->filter == NULL) |
0a102479 | 1049 | continue; |
745cefc5 | 1050 | |
d988d5ee KL |
1051 | /* |
1052 | * filters only work for tracepoint event, which doesn't have cpu limit. | |
1053 | * So evlist and evsel should always be same. | |
1054 | */ | |
a00571fd | 1055 | err = perf_evsel__apply_filter(&evsel->core, evsel->filter); |
23d4aad4 ACM |
1056 | if (err) { |
1057 | *err_evsel = evsel; | |
745cefc5 | 1058 | break; |
23d4aad4 | 1059 | } |
0a102479 FW |
1060 | } |
1061 | ||
745cefc5 ACM |
1062 | return err; |
1063 | } | |
1064 | ||
63503dba | 1065 | int perf_evlist__set_tp_filter(struct evlist *evlist, const char *filter) |
745cefc5 | 1066 | { |
32dcd021 | 1067 | struct evsel *evsel; |
745cefc5 | 1068 | int err = 0; |
745cefc5 | 1069 | |
e5cadb93 | 1070 | evlist__for_each_entry(evlist, evsel) { |
1fc632ce | 1071 | if (evsel->core.attr.type != PERF_TYPE_TRACEPOINT) |
fdf14720 WN |
1072 | continue; |
1073 | ||
94ad89bc | 1074 | err = perf_evsel__set_filter(evsel, filter); |
745cefc5 ACM |
1075 | if (err) |
1076 | break; | |
1077 | } | |
1078 | ||
1079 | return err; | |
0a102479 | 1080 | } |
74429964 | 1081 | |
63503dba | 1082 | int perf_evlist__set_tp_filter_pids(struct evlist *evlist, size_t npids, pid_t *pids) |
cfd70a26 ACM |
1083 | { |
1084 | char *filter; | |
be199ada ACM |
1085 | int ret = -1; |
1086 | size_t i; | |
cfd70a26 | 1087 | |
be199ada ACM |
1088 | for (i = 0; i < npids; ++i) { |
1089 | if (i == 0) { | |
1090 | if (asprintf(&filter, "common_pid != %d", pids[i]) < 0) | |
1091 | return -1; | |
1092 | } else { | |
1093 | char *tmp; | |
1094 | ||
1095 | if (asprintf(&tmp, "%s && common_pid != %d", filter, pids[i]) < 0) | |
1096 | goto out_free; | |
1097 | ||
1098 | free(filter); | |
1099 | filter = tmp; | |
1100 | } | |
1101 | } | |
cfd70a26 | 1102 | |
7ad92a33 | 1103 | ret = perf_evlist__set_tp_filter(evlist, filter); |
be199ada | 1104 | out_free: |
cfd70a26 ACM |
1105 | free(filter); |
1106 | return ret; | |
1107 | } | |
1108 | ||
63503dba | 1109 | int perf_evlist__set_tp_filter_pid(struct evlist *evlist, pid_t pid) |
be199ada | 1110 | { |
7ad92a33 | 1111 | return perf_evlist__set_tp_filter_pids(evlist, 1, &pid); |
be199ada ACM |
1112 | } |
1113 | ||
63503dba | 1114 | bool perf_evlist__valid_sample_type(struct evlist *evlist) |
74429964 | 1115 | { |
32dcd021 | 1116 | struct evsel *pos; |
c2a70653 | 1117 | |
6484d2f9 | 1118 | if (evlist->core.nr_entries == 1) |
75562573 AH |
1119 | return true; |
1120 | ||
1121 | if (evlist->id_pos < 0 || evlist->is_pos < 0) | |
1122 | return false; | |
1123 | ||
e5cadb93 | 1124 | evlist__for_each_entry(evlist, pos) { |
75562573 AH |
1125 | if (pos->id_pos != evlist->id_pos || |
1126 | pos->is_pos != evlist->is_pos) | |
c2a70653 | 1127 | return false; |
74429964 FW |
1128 | } |
1129 | ||
c2a70653 | 1130 | return true; |
74429964 FW |
1131 | } |
1132 | ||
63503dba | 1133 | u64 __perf_evlist__combined_sample_type(struct evlist *evlist) |
c2a70653 | 1134 | { |
32dcd021 | 1135 | struct evsel *evsel; |
75562573 AH |
1136 | |
1137 | if (evlist->combined_sample_type) | |
1138 | return evlist->combined_sample_type; | |
1139 | ||
e5cadb93 | 1140 | evlist__for_each_entry(evlist, evsel) |
1fc632ce | 1141 | evlist->combined_sample_type |= evsel->core.attr.sample_type; |
75562573 AH |
1142 | |
1143 | return evlist->combined_sample_type; | |
1144 | } | |
1145 | ||
63503dba | 1146 | u64 perf_evlist__combined_sample_type(struct evlist *evlist) |
75562573 AH |
1147 | { |
1148 | evlist->combined_sample_type = 0; | |
1149 | return __perf_evlist__combined_sample_type(evlist); | |
c2a70653 ACM |
1150 | } |
1151 | ||
63503dba | 1152 | u64 perf_evlist__combined_branch_type(struct evlist *evlist) |
98df858e | 1153 | { |
32dcd021 | 1154 | struct evsel *evsel; |
98df858e AK |
1155 | u64 branch_type = 0; |
1156 | ||
e5cadb93 | 1157 | evlist__for_each_entry(evlist, evsel) |
1fc632ce | 1158 | branch_type |= evsel->core.attr.branch_sample_type; |
98df858e AK |
1159 | return branch_type; |
1160 | } | |
1161 | ||
63503dba | 1162 | bool perf_evlist__valid_read_format(struct evlist *evlist) |
9ede473c | 1163 | { |
515dbe48 | 1164 | struct evsel *first = evlist__first(evlist), *pos = first; |
1fc632ce JO |
1165 | u64 read_format = first->core.attr.read_format; |
1166 | u64 sample_type = first->core.attr.sample_type; | |
9ede473c | 1167 | |
e5cadb93 | 1168 | evlist__for_each_entry(evlist, pos) { |
1fc632ce | 1169 | if (read_format != pos->core.attr.read_format) |
9ede473c JO |
1170 | return false; |
1171 | } | |
1172 | ||
1173 | /* PERF_SAMPLE_READ imples PERF_FORMAT_ID. */ | |
1174 | if ((sample_type & PERF_SAMPLE_READ) && | |
1175 | !(read_format & PERF_FORMAT_ID)) { | |
1176 | return false; | |
1177 | } | |
1178 | ||
1179 | return true; | |
1180 | } | |
1181 | ||
63503dba | 1182 | u16 perf_evlist__id_hdr_size(struct evlist *evlist) |
81e36bff | 1183 | { |
515dbe48 | 1184 | struct evsel *first = evlist__first(evlist); |
81e36bff ACM |
1185 | struct perf_sample *data; |
1186 | u64 sample_type; | |
1187 | u16 size = 0; | |
1188 | ||
1fc632ce | 1189 | if (!first->core.attr.sample_id_all) |
81e36bff ACM |
1190 | goto out; |
1191 | ||
1fc632ce | 1192 | sample_type = first->core.attr.sample_type; |
81e36bff ACM |
1193 | |
1194 | if (sample_type & PERF_SAMPLE_TID) | |
1195 | size += sizeof(data->tid) * 2; | |
1196 | ||
1197 | if (sample_type & PERF_SAMPLE_TIME) | |
1198 | size += sizeof(data->time); | |
1199 | ||
1200 | if (sample_type & PERF_SAMPLE_ID) | |
1201 | size += sizeof(data->id); | |
1202 | ||
1203 | if (sample_type & PERF_SAMPLE_STREAM_ID) | |
1204 | size += sizeof(data->stream_id); | |
1205 | ||
1206 | if (sample_type & PERF_SAMPLE_CPU) | |
1207 | size += sizeof(data->cpu) * 2; | |
75562573 AH |
1208 | |
1209 | if (sample_type & PERF_SAMPLE_IDENTIFIER) | |
1210 | size += sizeof(data->id); | |
81e36bff ACM |
1211 | out: |
1212 | return size; | |
1213 | } | |
1214 | ||
63503dba | 1215 | bool perf_evlist__valid_sample_id_all(struct evlist *evlist) |
74429964 | 1216 | { |
515dbe48 | 1217 | struct evsel *first = evlist__first(evlist), *pos = first; |
c2a70653 | 1218 | |
e5cadb93 | 1219 | evlist__for_each_entry_continue(evlist, pos) { |
1fc632ce | 1220 | if (first->core.attr.sample_id_all != pos->core.attr.sample_id_all) |
c2a70653 | 1221 | return false; |
74429964 FW |
1222 | } |
1223 | ||
c2a70653 ACM |
1224 | return true; |
1225 | } | |
1226 | ||
63503dba | 1227 | bool perf_evlist__sample_id_all(struct evlist *evlist) |
c2a70653 | 1228 | { |
515dbe48 | 1229 | struct evsel *first = evlist__first(evlist); |
1fc632ce | 1230 | return first->core.attr.sample_id_all; |
74429964 | 1231 | } |
81cce8de | 1232 | |
63503dba | 1233 | void perf_evlist__set_selected(struct evlist *evlist, |
32dcd021 | 1234 | struct evsel *evsel) |
81cce8de ACM |
1235 | { |
1236 | evlist->selected = evsel; | |
1237 | } | |
727ab04e | 1238 | |
750b4ede | 1239 | void evlist__close(struct evlist *evlist) |
a74b4b66 | 1240 | { |
32dcd021 | 1241 | struct evsel *evsel; |
a74b4b66 | 1242 | |
475fb533 | 1243 | evlist__for_each_entry_reverse(evlist, evsel) |
88761fa1 | 1244 | evsel__close(evsel); |
a74b4b66 NK |
1245 | } |
1246 | ||
63503dba | 1247 | static int perf_evlist__create_syswide_maps(struct evlist *evlist) |
4112eb18 | 1248 | { |
f854839b | 1249 | struct perf_cpu_map *cpus; |
9749b90e | 1250 | struct perf_thread_map *threads; |
4112eb18 ACM |
1251 | int err = -ENOMEM; |
1252 | ||
1253 | /* | |
1254 | * Try reading /sys/devices/system/cpu/online to get | |
1255 | * an all cpus map. | |
1256 | * | |
1257 | * FIXME: -ENOMEM is the best we can do here, the cpu_map | |
1258 | * code needs an overhaul to properly forward the | |
1259 | * error, and we may not want to do that fallback to a | |
1260 | * default cpu identity map :-\ | |
1261 | */ | |
9c3516d1 | 1262 | cpus = perf_cpu_map__new(NULL); |
8c0498b6 | 1263 | if (!cpus) |
4112eb18 ACM |
1264 | goto out; |
1265 | ||
4b49cce2 | 1266 | threads = perf_thread_map__new_dummy(); |
8c0498b6 AH |
1267 | if (!threads) |
1268 | goto out_put; | |
4112eb18 | 1269 | |
453fa030 | 1270 | perf_evlist__set_maps(&evlist->core, cpus, threads); |
4112eb18 ACM |
1271 | out: |
1272 | return err; | |
8c0498b6 | 1273 | out_put: |
38f01d8d | 1274 | perf_cpu_map__put(cpus); |
4112eb18 ACM |
1275 | goto out; |
1276 | } | |
1277 | ||
474ddc4c | 1278 | int evlist__open(struct evlist *evlist) |
727ab04e | 1279 | { |
32dcd021 | 1280 | struct evsel *evsel; |
a74b4b66 | 1281 | int err; |
727ab04e | 1282 | |
4112eb18 ACM |
1283 | /* |
1284 | * Default: one fd per CPU, all threads, aka systemwide | |
1285 | * as sys_perf_event_open(cpu = -1, thread = -1) is EINVAL | |
1286 | */ | |
03617c22 | 1287 | if (evlist->core.threads == NULL && evlist->core.cpus == NULL) { |
4112eb18 ACM |
1288 | err = perf_evlist__create_syswide_maps(evlist); |
1289 | if (err < 0) | |
1290 | goto out_err; | |
1291 | } | |
1292 | ||
733cd2fe AH |
1293 | perf_evlist__update_id_pos(evlist); |
1294 | ||
e5cadb93 | 1295 | evlist__for_each_entry(evlist, evsel) { |
af663bd0 | 1296 | err = evsel__open(evsel, evsel->core.cpus, evsel->core.threads); |
727ab04e ACM |
1297 | if (err < 0) |
1298 | goto out_err; | |
1299 | } | |
1300 | ||
1301 | return 0; | |
1302 | out_err: | |
750b4ede | 1303 | evlist__close(evlist); |
41c21a68 | 1304 | errno = -err; |
727ab04e ACM |
1305 | return err; |
1306 | } | |
35b9d88e | 1307 | |
63503dba | 1308 | int perf_evlist__prepare_workload(struct evlist *evlist, struct target *target, |
55e162ea | 1309 | const char *argv[], bool pipe_output, |
735f7e0b | 1310 | void (*exec_error)(int signo, siginfo_t *info, void *ucontext)) |
35b9d88e ACM |
1311 | { |
1312 | int child_ready_pipe[2], go_pipe[2]; | |
1313 | char bf; | |
1314 | ||
1315 | if (pipe(child_ready_pipe) < 0) { | |
1316 | perror("failed to create 'ready' pipe"); | |
1317 | return -1; | |
1318 | } | |
1319 | ||
1320 | if (pipe(go_pipe) < 0) { | |
1321 | perror("failed to create 'go' pipe"); | |
1322 | goto out_close_ready_pipe; | |
1323 | } | |
1324 | ||
1325 | evlist->workload.pid = fork(); | |
1326 | if (evlist->workload.pid < 0) { | |
1327 | perror("failed to fork"); | |
1328 | goto out_close_pipes; | |
1329 | } | |
1330 | ||
1331 | if (!evlist->workload.pid) { | |
5f1c4225 ACM |
1332 | int ret; |
1333 | ||
119fa3c9 | 1334 | if (pipe_output) |
35b9d88e ACM |
1335 | dup2(2, 1); |
1336 | ||
0817df08 DA |
1337 | signal(SIGTERM, SIG_DFL); |
1338 | ||
35b9d88e ACM |
1339 | close(child_ready_pipe[0]); |
1340 | close(go_pipe[1]); | |
1341 | fcntl(go_pipe[0], F_SETFD, FD_CLOEXEC); | |
1342 | ||
35b9d88e ACM |
1343 | /* |
1344 | * Tell the parent we're ready to go | |
1345 | */ | |
1346 | close(child_ready_pipe[1]); | |
1347 | ||
1348 | /* | |
1349 | * Wait until the parent tells us to go. | |
1350 | */ | |
5f1c4225 ACM |
1351 | ret = read(go_pipe[0], &bf, 1); |
1352 | /* | |
1353 | * The parent will ask for the execvp() to be performed by | |
1354 | * writing exactly one byte, in workload.cork_fd, usually via | |
1355 | * perf_evlist__start_workload(). | |
1356 | * | |
20f86fc1 | 1357 | * For cancelling the workload without actually running it, |
5f1c4225 ACM |
1358 | * the parent will just close workload.cork_fd, without writing |
1359 | * anything, i.e. read will return zero and we just exit() | |
1360 | * here. | |
1361 | */ | |
1362 | if (ret != 1) { | |
1363 | if (ret == -1) | |
1364 | perror("unable to read pipe"); | |
1365 | exit(ret); | |
1366 | } | |
35b9d88e ACM |
1367 | |
1368 | execvp(argv[0], (char **)argv); | |
1369 | ||
735f7e0b | 1370 | if (exec_error) { |
f33cbe72 ACM |
1371 | union sigval val; |
1372 | ||
1373 | val.sival_int = errno; | |
1374 | if (sigqueue(getppid(), SIGUSR1, val)) | |
1375 | perror(argv[0]); | |
1376 | } else | |
1377 | perror(argv[0]); | |
35b9d88e ACM |
1378 | exit(-1); |
1379 | } | |
1380 | ||
735f7e0b ACM |
1381 | if (exec_error) { |
1382 | struct sigaction act = { | |
1383 | .sa_flags = SA_SIGINFO, | |
1384 | .sa_sigaction = exec_error, | |
1385 | }; | |
1386 | sigaction(SIGUSR1, &act, NULL); | |
1387 | } | |
1388 | ||
1aaf63b1 | 1389 | if (target__none(target)) { |
03617c22 | 1390 | if (evlist->core.threads == NULL) { |
1aaf63b1 ACM |
1391 | fprintf(stderr, "FATAL: evlist->threads need to be set at this point (%s:%d).\n", |
1392 | __func__, __LINE__); | |
1393 | goto out_close_pipes; | |
1394 | } | |
03617c22 | 1395 | perf_thread_map__set_pid(evlist->core.threads, 0, evlist->workload.pid); |
1aaf63b1 | 1396 | } |
35b9d88e ACM |
1397 | |
1398 | close(child_ready_pipe[1]); | |
1399 | close(go_pipe[0]); | |
1400 | /* | |
1401 | * wait for child to settle | |
1402 | */ | |
1403 | if (read(child_ready_pipe[0], &bf, 1) == -1) { | |
1404 | perror("unable to read pipe"); | |
1405 | goto out_close_pipes; | |
1406 | } | |
1407 | ||
bcf3145f | 1408 | fcntl(go_pipe[1], F_SETFD, FD_CLOEXEC); |
35b9d88e ACM |
1409 | evlist->workload.cork_fd = go_pipe[1]; |
1410 | close(child_ready_pipe[0]); | |
1411 | return 0; | |
1412 | ||
1413 | out_close_pipes: | |
1414 | close(go_pipe[0]); | |
1415 | close(go_pipe[1]); | |
1416 | out_close_ready_pipe: | |
1417 | close(child_ready_pipe[0]); | |
1418 | close(child_ready_pipe[1]); | |
1419 | return -1; | |
1420 | } | |
1421 | ||
63503dba | 1422 | int perf_evlist__start_workload(struct evlist *evlist) |
35b9d88e ACM |
1423 | { |
1424 | if (evlist->workload.cork_fd > 0) { | |
b3824404 | 1425 | char bf = 0; |
bcf3145f | 1426 | int ret; |
35b9d88e ACM |
1427 | /* |
1428 | * Remove the cork, let it rip! | |
1429 | */ | |
bcf3145f NK |
1430 | ret = write(evlist->workload.cork_fd, &bf, 1); |
1431 | if (ret < 0) | |
e978be9e | 1432 | perror("unable to write to pipe"); |
bcf3145f NK |
1433 | |
1434 | close(evlist->workload.cork_fd); | |
1435 | return ret; | |
35b9d88e ACM |
1436 | } |
1437 | ||
1438 | return 0; | |
1439 | } | |
cb0b29e0 | 1440 | |
63503dba | 1441 | int perf_evlist__parse_sample(struct evlist *evlist, union perf_event *event, |
0807d2d8 | 1442 | struct perf_sample *sample) |
cb0b29e0 | 1443 | { |
32dcd021 | 1444 | struct evsel *evsel = perf_evlist__event2evsel(evlist, event); |
75562573 AH |
1445 | |
1446 | if (!evsel) | |
1447 | return -EFAULT; | |
0807d2d8 | 1448 | return perf_evsel__parse_sample(evsel, event, sample); |
cb0b29e0 | 1449 | } |
78f067b3 | 1450 | |
63503dba | 1451 | int perf_evlist__parse_sample_timestamp(struct evlist *evlist, |
01468120 JO |
1452 | union perf_event *event, |
1453 | u64 *timestamp) | |
1454 | { | |
32dcd021 | 1455 | struct evsel *evsel = perf_evlist__event2evsel(evlist, event); |
01468120 JO |
1456 | |
1457 | if (!evsel) | |
1458 | return -EFAULT; | |
1459 | return perf_evsel__parse_sample_timestamp(evsel, event, timestamp); | |
1460 | } | |
1461 | ||
63503dba | 1462 | size_t perf_evlist__fprintf(struct evlist *evlist, FILE *fp) |
78f067b3 | 1463 | { |
32dcd021 | 1464 | struct evsel *evsel; |
78f067b3 ACM |
1465 | size_t printed = 0; |
1466 | ||
e5cadb93 | 1467 | evlist__for_each_entry(evlist, evsel) { |
78f067b3 ACM |
1468 | printed += fprintf(fp, "%s%s", evsel->idx ? ", " : "", |
1469 | perf_evsel__name(evsel)); | |
1470 | } | |
1471 | ||
b2222139 | 1472 | return printed + fprintf(fp, "\n"); |
78f067b3 | 1473 | } |
6ef068cb | 1474 | |
63503dba | 1475 | int perf_evlist__strerror_open(struct evlist *evlist, |
a8f23d8f ACM |
1476 | int err, char *buf, size_t size) |
1477 | { | |
1478 | int printed, value; | |
c8b5f2c9 | 1479 | char sbuf[STRERR_BUFSIZE], *emsg = str_error_r(err, sbuf, sizeof(sbuf)); |
a8f23d8f ACM |
1480 | |
1481 | switch (err) { | |
1482 | case EACCES: | |
1483 | case EPERM: | |
1484 | printed = scnprintf(buf, size, | |
1485 | "Error:\t%s.\n" | |
1486 | "Hint:\tCheck /proc/sys/kernel/perf_event_paranoid setting.", emsg); | |
1487 | ||
1a47245d | 1488 | value = perf_event_paranoid(); |
a8f23d8f ACM |
1489 | |
1490 | printed += scnprintf(buf + printed, size - printed, "\nHint:\t"); | |
1491 | ||
1492 | if (value >= 2) { | |
1493 | printed += scnprintf(buf + printed, size - printed, | |
1494 | "For your workloads it needs to be <= 1\nHint:\t"); | |
1495 | } | |
1496 | printed += scnprintf(buf + printed, size - printed, | |
5229e366 | 1497 | "For system wide tracing it needs to be set to -1.\n"); |
a8f23d8f ACM |
1498 | |
1499 | printed += scnprintf(buf + printed, size - printed, | |
5229e366 ACM |
1500 | "Hint:\tTry: 'sudo sh -c \"echo -1 > /proc/sys/kernel/perf_event_paranoid\"'\n" |
1501 | "Hint:\tThe current value is %d.", value); | |
a8f23d8f | 1502 | break; |
d9aade7f | 1503 | case EINVAL: { |
515dbe48 | 1504 | struct evsel *first = evlist__first(evlist); |
d9aade7f ACM |
1505 | int max_freq; |
1506 | ||
1507 | if (sysctl__read_int("kernel/perf_event_max_sample_rate", &max_freq) < 0) | |
1508 | goto out_default; | |
1509 | ||
1fc632ce | 1510 | if (first->core.attr.sample_freq < (u64)max_freq) |
d9aade7f ACM |
1511 | goto out_default; |
1512 | ||
1513 | printed = scnprintf(buf, size, | |
1514 | "Error:\t%s.\n" | |
1515 | "Hint:\tCheck /proc/sys/kernel/perf_event_max_sample_rate.\n" | |
1516 | "Hint:\tThe current value is %d and %" PRIu64 " is being requested.", | |
1fc632ce | 1517 | emsg, max_freq, first->core.attr.sample_freq); |
d9aade7f ACM |
1518 | break; |
1519 | } | |
a8f23d8f | 1520 | default: |
d9aade7f | 1521 | out_default: |
a8f23d8f ACM |
1522 | scnprintf(buf, size, "%s", emsg); |
1523 | break; | |
1524 | } | |
1525 | ||
1526 | return 0; | |
1527 | } | |
a025e4f0 | 1528 | |
63503dba | 1529 | int perf_evlist__strerror_mmap(struct evlist *evlist, int err, char *buf, size_t size) |
956fa571 | 1530 | { |
c8b5f2c9 | 1531 | char sbuf[STRERR_BUFSIZE], *emsg = str_error_r(err, sbuf, sizeof(sbuf)); |
f6fa4375 | 1532 | int pages_attempted = evlist->core.mmap_len / 1024, pages_max_per_user, printed = 0; |
956fa571 ACM |
1533 | |
1534 | switch (err) { | |
1535 | case EPERM: | |
e5d4a290 | 1536 | sysctl__read_int("kernel/perf_event_mlock_kb", &pages_max_per_user); |
e965bea1 ACM |
1537 | printed += scnprintf(buf + printed, size - printed, |
1538 | "Error:\t%s.\n" | |
956fa571 | 1539 | "Hint:\tCheck /proc/sys/kernel/perf_event_mlock_kb (%d kB) setting.\n" |
e965bea1 | 1540 | "Hint:\tTried using %zd kB.\n", |
e5d4a290 | 1541 | emsg, pages_max_per_user, pages_attempted); |
e965bea1 ACM |
1542 | |
1543 | if (pages_attempted >= pages_max_per_user) { | |
1544 | printed += scnprintf(buf + printed, size - printed, | |
1545 | "Hint:\tTry 'sudo sh -c \"echo %d > /proc/sys/kernel/perf_event_mlock_kb\"', or\n", | |
1546 | pages_max_per_user + pages_attempted); | |
1547 | } | |
1548 | ||
1549 | printed += scnprintf(buf + printed, size - printed, | |
1550 | "Hint:\tTry using a smaller -m/--mmap-pages value."); | |
956fa571 ACM |
1551 | break; |
1552 | default: | |
1553 | scnprintf(buf, size, "%s", emsg); | |
1554 | break; | |
1555 | } | |
1556 | ||
1557 | return 0; | |
1558 | } | |
1559 | ||
63503dba | 1560 | void perf_evlist__to_front(struct evlist *evlist, |
32dcd021 | 1561 | struct evsel *move_evsel) |
a025e4f0 | 1562 | { |
32dcd021 | 1563 | struct evsel *evsel, *n; |
a025e4f0 AH |
1564 | LIST_HEAD(move); |
1565 | ||
515dbe48 | 1566 | if (move_evsel == evlist__first(evlist)) |
a025e4f0 AH |
1567 | return; |
1568 | ||
e5cadb93 | 1569 | evlist__for_each_entry_safe(evlist, n, evsel) { |
a025e4f0 | 1570 | if (evsel->leader == move_evsel->leader) |
b27c4ece | 1571 | list_move_tail(&evsel->core.node, &move); |
a025e4f0 AH |
1572 | } |
1573 | ||
ce9036a6 | 1574 | list_splice(&move, &evlist->core.entries); |
a025e4f0 | 1575 | } |
60b0896c | 1576 | |
63503dba | 1577 | void perf_evlist__set_tracking_event(struct evlist *evlist, |
32dcd021 | 1578 | struct evsel *tracking_evsel) |
60b0896c | 1579 | { |
32dcd021 | 1580 | struct evsel *evsel; |
60b0896c AH |
1581 | |
1582 | if (tracking_evsel->tracking) | |
1583 | return; | |
1584 | ||
e5cadb93 | 1585 | evlist__for_each_entry(evlist, evsel) { |
60b0896c AH |
1586 | if (evsel != tracking_evsel) |
1587 | evsel->tracking = false; | |
1588 | } | |
1589 | ||
1590 | tracking_evsel->tracking = true; | |
1591 | } | |
7630b3e2 | 1592 | |
32dcd021 | 1593 | struct evsel * |
63503dba | 1594 | perf_evlist__find_evsel_by_str(struct evlist *evlist, |
7630b3e2 WN |
1595 | const char *str) |
1596 | { | |
32dcd021 | 1597 | struct evsel *evsel; |
7630b3e2 | 1598 | |
e5cadb93 | 1599 | evlist__for_each_entry(evlist, evsel) { |
7630b3e2 WN |
1600 | if (!evsel->name) |
1601 | continue; | |
1602 | if (strcmp(str, evsel->name) == 0) | |
1603 | return evsel; | |
1604 | } | |
1605 | ||
1606 | return NULL; | |
1607 | } | |
54cc54de | 1608 | |
63503dba | 1609 | void perf_evlist__toggle_bkw_mmap(struct evlist *evlist, |
54cc54de WN |
1610 | enum bkw_mmap_state state) |
1611 | { | |
1612 | enum bkw_mmap_state old_state = evlist->bkw_mmap_state; | |
1613 | enum action { | |
1614 | NONE, | |
1615 | PAUSE, | |
1616 | RESUME, | |
1617 | } action = NONE; | |
1618 | ||
0b72d69a | 1619 | if (!evlist->overwrite_mmap) |
54cc54de WN |
1620 | return; |
1621 | ||
1622 | switch (old_state) { | |
1623 | case BKW_MMAP_NOTREADY: { | |
1624 | if (state != BKW_MMAP_RUNNING) | |
dd8bd53a | 1625 | goto state_err; |
54cc54de WN |
1626 | break; |
1627 | } | |
1628 | case BKW_MMAP_RUNNING: { | |
1629 | if (state != BKW_MMAP_DATA_PENDING) | |
1630 | goto state_err; | |
1631 | action = PAUSE; | |
1632 | break; | |
1633 | } | |
1634 | case BKW_MMAP_DATA_PENDING: { | |
1635 | if (state != BKW_MMAP_EMPTY) | |
1636 | goto state_err; | |
1637 | break; | |
1638 | } | |
1639 | case BKW_MMAP_EMPTY: { | |
1640 | if (state != BKW_MMAP_RUNNING) | |
1641 | goto state_err; | |
1642 | action = RESUME; | |
1643 | break; | |
1644 | } | |
1645 | default: | |
1646 | WARN_ONCE(1, "Shouldn't get there\n"); | |
1647 | } | |
1648 | ||
1649 | evlist->bkw_mmap_state = state; | |
1650 | ||
1651 | switch (action) { | |
1652 | case PAUSE: | |
1653 | perf_evlist__pause(evlist); | |
1654 | break; | |
1655 | case RESUME: | |
1656 | perf_evlist__resume(evlist); | |
1657 | break; | |
1658 | case NONE: | |
1659 | default: | |
1660 | break; | |
1661 | } | |
1662 | ||
1663 | state_err: | |
1664 | return; | |
1665 | } | |
07d6f446 | 1666 | |
63503dba | 1667 | bool perf_evlist__exclude_kernel(struct evlist *evlist) |
07d6f446 | 1668 | { |
32dcd021 | 1669 | struct evsel *evsel; |
07d6f446 ACM |
1670 | |
1671 | evlist__for_each_entry(evlist, evsel) { | |
1fc632ce | 1672 | if (!evsel->core.attr.exclude_kernel) |
07d6f446 ACM |
1673 | return false; |
1674 | } | |
1675 | ||
1676 | return true; | |
1677 | } | |
e2bdbe80 JY |
1678 | |
1679 | /* | |
1680 | * Events in data file are not collect in groups, but we still want | |
1681 | * the group display. Set the artificial group and set the leader's | |
1682 | * forced_leader flag to notify the display code. | |
1683 | */ | |
63503dba | 1684 | void perf_evlist__force_leader(struct evlist *evlist) |
e2bdbe80 JY |
1685 | { |
1686 | if (!evlist->nr_groups) { | |
515dbe48 | 1687 | struct evsel *leader = evlist__first(evlist); |
e2bdbe80 JY |
1688 | |
1689 | perf_evlist__set_leader(evlist); | |
1690 | leader->forced_leader = true; | |
1691 | } | |
1692 | } | |
c3537fc2 | 1693 | |
63503dba | 1694 | struct evsel *perf_evlist__reset_weak_group(struct evlist *evsel_list, |
32dcd021 | 1695 | struct evsel *evsel) |
c3537fc2 | 1696 | { |
32dcd021 | 1697 | struct evsel *c2, *leader; |
c3537fc2 AK |
1698 | bool is_open = true; |
1699 | ||
1700 | leader = evsel->leader; | |
1701 | pr_debug("Weak group for %s/%d failed\n", | |
5643b1a5 | 1702 | leader->name, leader->core.nr_members); |
c3537fc2 AK |
1703 | |
1704 | /* | |
1705 | * for_each_group_member doesn't work here because it doesn't | |
1706 | * include the first entry. | |
1707 | */ | |
1708 | evlist__for_each_entry(evsel_list, c2) { | |
1709 | if (c2 == evsel) | |
1710 | is_open = false; | |
1711 | if (c2->leader == leader) { | |
1712 | if (is_open) | |
88761fa1 | 1713 | evsel__close(c2); |
c3537fc2 | 1714 | c2->leader = c2; |
5643b1a5 | 1715 | c2->core.nr_members = 0; |
c3537fc2 AK |
1716 | } |
1717 | } | |
1718 | return leader; | |
1719 | } | |
657ee553 | 1720 | |
63503dba | 1721 | int perf_evlist__add_sb_event(struct evlist **evlist, |
657ee553 SL |
1722 | struct perf_event_attr *attr, |
1723 | perf_evsel__sb_cb_t cb, | |
1724 | void *data) | |
1725 | { | |
32dcd021 | 1726 | struct evsel *evsel; |
657ee553 SL |
1727 | bool new_evlist = (*evlist) == NULL; |
1728 | ||
1729 | if (*evlist == NULL) | |
0f98b11c | 1730 | *evlist = evlist__new(); |
657ee553 SL |
1731 | if (*evlist == NULL) |
1732 | return -1; | |
1733 | ||
1734 | if (!attr->sample_id_all) { | |
1735 | pr_warning("enabling sample_id_all for all side band events\n"); | |
1736 | attr->sample_id_all = 1; | |
1737 | } | |
1738 | ||
6484d2f9 | 1739 | evsel = perf_evsel__new_idx(attr, (*evlist)->core.nr_entries); |
657ee553 SL |
1740 | if (!evsel) |
1741 | goto out_err; | |
1742 | ||
1743 | evsel->side_band.cb = cb; | |
1744 | evsel->side_band.data = data; | |
a1cf3a75 | 1745 | evlist__add(*evlist, evsel); |
657ee553 SL |
1746 | return 0; |
1747 | ||
1748 | out_err: | |
1749 | if (new_evlist) { | |
c12995a5 | 1750 | evlist__delete(*evlist); |
657ee553 SL |
1751 | *evlist = NULL; |
1752 | } | |
1753 | return -1; | |
1754 | } | |
1755 | ||
1756 | static void *perf_evlist__poll_thread(void *arg) | |
1757 | { | |
63503dba | 1758 | struct evlist *evlist = arg; |
657ee553 | 1759 | bool draining = false; |
adc6257c | 1760 | int i, done = 0; |
b397f846 ACM |
1761 | /* |
1762 | * In order to read symbols from other namespaces perf to needs to call | |
1763 | * setns(2). This isn't permitted if the struct_fs has multiple users. | |
1764 | * unshare(2) the fs so that we may continue to setns into namespaces | |
1765 | * that we're observing when, for instance, reading the build-ids at | |
1766 | * the end of a 'perf record' session. | |
1767 | */ | |
1768 | unshare(CLONE_FS); | |
adc6257c JO |
1769 | |
1770 | while (!done) { | |
1771 | bool got_data = false; | |
657ee553 | 1772 | |
adc6257c | 1773 | if (evlist->thread.done) |
657ee553 SL |
1774 | draining = true; |
1775 | ||
1776 | if (!draining) | |
1777 | perf_evlist__poll(evlist, 1000); | |
1778 | ||
c976ee11 | 1779 | for (i = 0; i < evlist->core.nr_mmaps; i++) { |
a5830532 | 1780 | struct mmap *map = &evlist->mmap[i]; |
657ee553 SL |
1781 | union perf_event *event; |
1782 | ||
1783 | if (perf_mmap__read_init(map)) | |
1784 | continue; | |
1785 | while ((event = perf_mmap__read_event(map)) != NULL) { | |
32dcd021 | 1786 | struct evsel *evsel = perf_evlist__event2evsel(evlist, event); |
657ee553 SL |
1787 | |
1788 | if (evsel && evsel->side_band.cb) | |
1789 | evsel->side_band.cb(event, evsel->side_band.data); | |
1790 | else | |
1791 | pr_warning("cannot locate proper evsel for the side band event\n"); | |
1792 | ||
1793 | perf_mmap__consume(map); | |
adc6257c | 1794 | got_data = true; |
657ee553 SL |
1795 | } |
1796 | perf_mmap__read_done(map); | |
1797 | } | |
adc6257c JO |
1798 | |
1799 | if (draining && !got_data) | |
1800 | break; | |
657ee553 SL |
1801 | } |
1802 | return NULL; | |
1803 | } | |
1804 | ||
63503dba | 1805 | int perf_evlist__start_sb_thread(struct evlist *evlist, |
657ee553 SL |
1806 | struct target *target) |
1807 | { | |
32dcd021 | 1808 | struct evsel *counter; |
657ee553 SL |
1809 | |
1810 | if (!evlist) | |
1811 | return 0; | |
1812 | ||
1813 | if (perf_evlist__create_maps(evlist, target)) | |
1814 | goto out_delete_evlist; | |
1815 | ||
1816 | evlist__for_each_entry(evlist, counter) { | |
f72f901d | 1817 | if (evsel__open(counter, evlist->core.cpus, |
03617c22 | 1818 | evlist->core.threads) < 0) |
657ee553 SL |
1819 | goto out_delete_evlist; |
1820 | } | |
1821 | ||
9521b5f2 | 1822 | if (evlist__mmap(evlist, UINT_MAX)) |
657ee553 SL |
1823 | goto out_delete_evlist; |
1824 | ||
1825 | evlist__for_each_entry(evlist, counter) { | |
ec7f24ef | 1826 | if (evsel__enable(counter)) |
657ee553 SL |
1827 | goto out_delete_evlist; |
1828 | } | |
1829 | ||
1830 | evlist->thread.done = 0; | |
1831 | if (pthread_create(&evlist->thread.th, NULL, perf_evlist__poll_thread, evlist)) | |
1832 | goto out_delete_evlist; | |
1833 | ||
1834 | return 0; | |
1835 | ||
1836 | out_delete_evlist: | |
c12995a5 | 1837 | evlist__delete(evlist); |
657ee553 SL |
1838 | evlist = NULL; |
1839 | return -1; | |
1840 | } | |
1841 | ||
63503dba | 1842 | void perf_evlist__stop_sb_thread(struct evlist *evlist) |
657ee553 SL |
1843 | { |
1844 | if (!evlist) | |
1845 | return; | |
1846 | evlist->thread.done = 1; | |
1847 | pthread_join(evlist->thread.th, NULL); | |
c12995a5 | 1848 | evlist__delete(evlist); |
657ee553 | 1849 | } |