Commit | Line | Data |
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f8a95309 ACM |
1 | /* |
2 | * Copyright (C) 2011, Red Hat Inc, Arnaldo Carvalho de Melo <acme@redhat.com> | |
3 | * | |
4 | * Parts came from builtin-{top,stat,record}.c, see those files for further | |
5 | * copyright notes. | |
6 | * | |
7 | * Released under the GPL v2. (and only v2, not any later version) | |
8 | */ | |
a8c9ae18 | 9 | #include "util.h" |
553873e1 | 10 | #include <api/fs/debugfs.h> |
5c581041 | 11 | #include <poll.h> |
f8a95309 ACM |
12 | #include "cpumap.h" |
13 | #include "thread_map.h" | |
12864b31 | 14 | #include "target.h" |
361c99a6 ACM |
15 | #include "evlist.h" |
16 | #include "evsel.h" | |
e3e1a54f | 17 | #include "debug.h" |
35b9d88e | 18 | #include <unistd.h> |
361c99a6 | 19 | |
50d08e47 | 20 | #include "parse-events.h" |
994a1f78 | 21 | #include "parse-options.h" |
50d08e47 | 22 | |
f8a95309 ACM |
23 | #include <sys/mman.h> |
24 | ||
70db7533 ACM |
25 | #include <linux/bitops.h> |
26 | #include <linux/hash.h> | |
27 | ||
f8a95309 | 28 | #define FD(e, x, y) (*(int *)xyarray__entry(e->fd, x, y)) |
a91e5431 | 29 | #define SID(e, x, y) xyarray__entry(e->sample_id, x, y) |
f8a95309 | 30 | |
7e2ed097 ACM |
31 | void perf_evlist__init(struct perf_evlist *evlist, struct cpu_map *cpus, |
32 | struct thread_map *threads) | |
ef1d1af2 ACM |
33 | { |
34 | int i; | |
35 | ||
36 | for (i = 0; i < PERF_EVLIST__HLIST_SIZE; ++i) | |
37 | INIT_HLIST_HEAD(&evlist->heads[i]); | |
38 | INIT_LIST_HEAD(&evlist->entries); | |
7e2ed097 | 39 | perf_evlist__set_maps(evlist, cpus, threads); |
35b9d88e | 40 | evlist->workload.pid = -1; |
ef1d1af2 ACM |
41 | } |
42 | ||
334fe7a3 | 43 | struct perf_evlist *perf_evlist__new(void) |
361c99a6 ACM |
44 | { |
45 | struct perf_evlist *evlist = zalloc(sizeof(*evlist)); | |
46 | ||
ef1d1af2 | 47 | if (evlist != NULL) |
334fe7a3 | 48 | perf_evlist__init(evlist, NULL, NULL); |
361c99a6 ACM |
49 | |
50 | return evlist; | |
51 | } | |
52 | ||
b22d54b0 JO |
53 | struct perf_evlist *perf_evlist__new_default(void) |
54 | { | |
55 | struct perf_evlist *evlist = perf_evlist__new(); | |
56 | ||
57 | if (evlist && perf_evlist__add_default(evlist)) { | |
58 | perf_evlist__delete(evlist); | |
59 | evlist = NULL; | |
60 | } | |
61 | ||
62 | return evlist; | |
63 | } | |
64 | ||
75562573 AH |
65 | /** |
66 | * perf_evlist__set_id_pos - set the positions of event ids. | |
67 | * @evlist: selected event list | |
68 | * | |
69 | * Events with compatible sample types all have the same id_pos | |
70 | * and is_pos. For convenience, put a copy on evlist. | |
71 | */ | |
72 | void perf_evlist__set_id_pos(struct perf_evlist *evlist) | |
73 | { | |
74 | struct perf_evsel *first = perf_evlist__first(evlist); | |
75 | ||
76 | evlist->id_pos = first->id_pos; | |
77 | evlist->is_pos = first->is_pos; | |
78 | } | |
79 | ||
733cd2fe AH |
80 | static void perf_evlist__update_id_pos(struct perf_evlist *evlist) |
81 | { | |
82 | struct perf_evsel *evsel; | |
83 | ||
84 | list_for_each_entry(evsel, &evlist->entries, node) | |
85 | perf_evsel__calc_id_pos(evsel); | |
86 | ||
87 | perf_evlist__set_id_pos(evlist); | |
88 | } | |
89 | ||
361c99a6 ACM |
90 | static void perf_evlist__purge(struct perf_evlist *evlist) |
91 | { | |
92 | struct perf_evsel *pos, *n; | |
93 | ||
94 | list_for_each_entry_safe(pos, n, &evlist->entries, node) { | |
95 | list_del_init(&pos->node); | |
96 | perf_evsel__delete(pos); | |
97 | } | |
98 | ||
99 | evlist->nr_entries = 0; | |
100 | } | |
101 | ||
ef1d1af2 | 102 | void perf_evlist__exit(struct perf_evlist *evlist) |
361c99a6 | 103 | { |
04662523 ACM |
104 | zfree(&evlist->mmap); |
105 | zfree(&evlist->pollfd); | |
ef1d1af2 ACM |
106 | } |
107 | ||
108 | void perf_evlist__delete(struct perf_evlist *evlist) | |
109 | { | |
03ad9747 ACM |
110 | cpu_map__delete(evlist->cpus); |
111 | thread_map__delete(evlist->threads); | |
112 | evlist->cpus = NULL; | |
113 | evlist->threads = NULL; | |
ef1d1af2 ACM |
114 | perf_evlist__purge(evlist); |
115 | perf_evlist__exit(evlist); | |
361c99a6 ACM |
116 | free(evlist); |
117 | } | |
118 | ||
119 | void perf_evlist__add(struct perf_evlist *evlist, struct perf_evsel *entry) | |
120 | { | |
121 | list_add_tail(&entry->node, &evlist->entries); | |
ef503831 ACM |
122 | entry->idx = evlist->nr_entries; |
123 | ||
75562573 AH |
124 | if (!evlist->nr_entries++) |
125 | perf_evlist__set_id_pos(evlist); | |
361c99a6 ACM |
126 | } |
127 | ||
0529bc1f JO |
128 | void perf_evlist__splice_list_tail(struct perf_evlist *evlist, |
129 | struct list_head *list, | |
130 | int nr_entries) | |
50d08e47 | 131 | { |
75562573 AH |
132 | bool set_id_pos = !evlist->nr_entries; |
133 | ||
50d08e47 ACM |
134 | list_splice_tail(list, &evlist->entries); |
135 | evlist->nr_entries += nr_entries; | |
75562573 AH |
136 | if (set_id_pos) |
137 | perf_evlist__set_id_pos(evlist); | |
50d08e47 ACM |
138 | } |
139 | ||
63dab225 ACM |
140 | void __perf_evlist__set_leader(struct list_head *list) |
141 | { | |
142 | struct perf_evsel *evsel, *leader; | |
143 | ||
144 | leader = list_entry(list->next, struct perf_evsel, node); | |
97f63e4a NK |
145 | evsel = list_entry(list->prev, struct perf_evsel, node); |
146 | ||
147 | leader->nr_members = evsel->idx - leader->idx + 1; | |
63dab225 ACM |
148 | |
149 | list_for_each_entry(evsel, list, node) { | |
74b2133d | 150 | evsel->leader = leader; |
63dab225 ACM |
151 | } |
152 | } | |
153 | ||
154 | void perf_evlist__set_leader(struct perf_evlist *evlist) | |
6a4bb04c | 155 | { |
97f63e4a NK |
156 | if (evlist->nr_entries) { |
157 | evlist->nr_groups = evlist->nr_entries > 1 ? 1 : 0; | |
63dab225 | 158 | __perf_evlist__set_leader(&evlist->entries); |
97f63e4a | 159 | } |
6a4bb04c JO |
160 | } |
161 | ||
361c99a6 ACM |
162 | int perf_evlist__add_default(struct perf_evlist *evlist) |
163 | { | |
164 | struct perf_event_attr attr = { | |
165 | .type = PERF_TYPE_HARDWARE, | |
166 | .config = PERF_COUNT_HW_CPU_CYCLES, | |
167 | }; | |
1aed2671 JR |
168 | struct perf_evsel *evsel; |
169 | ||
170 | event_attr_init(&attr); | |
361c99a6 | 171 | |
ef503831 | 172 | evsel = perf_evsel__new(&attr); |
361c99a6 | 173 | if (evsel == NULL) |
cc2d86b0 SE |
174 | goto error; |
175 | ||
176 | /* use strdup() because free(evsel) assumes name is allocated */ | |
177 | evsel->name = strdup("cycles"); | |
178 | if (!evsel->name) | |
179 | goto error_free; | |
361c99a6 ACM |
180 | |
181 | perf_evlist__add(evlist, evsel); | |
182 | return 0; | |
cc2d86b0 SE |
183 | error_free: |
184 | perf_evsel__delete(evsel); | |
185 | error: | |
186 | return -ENOMEM; | |
361c99a6 | 187 | } |
5c581041 | 188 | |
e60fc847 ACM |
189 | static int perf_evlist__add_attrs(struct perf_evlist *evlist, |
190 | struct perf_event_attr *attrs, size_t nr_attrs) | |
50d08e47 ACM |
191 | { |
192 | struct perf_evsel *evsel, *n; | |
193 | LIST_HEAD(head); | |
194 | size_t i; | |
195 | ||
196 | for (i = 0; i < nr_attrs; i++) { | |
ef503831 | 197 | evsel = perf_evsel__new_idx(attrs + i, evlist->nr_entries + i); |
50d08e47 ACM |
198 | if (evsel == NULL) |
199 | goto out_delete_partial_list; | |
200 | list_add_tail(&evsel->node, &head); | |
201 | } | |
202 | ||
203 | perf_evlist__splice_list_tail(evlist, &head, nr_attrs); | |
204 | ||
205 | return 0; | |
206 | ||
207 | out_delete_partial_list: | |
208 | list_for_each_entry_safe(evsel, n, &head, node) | |
209 | perf_evsel__delete(evsel); | |
210 | return -1; | |
211 | } | |
212 | ||
79695e1b ACM |
213 | int __perf_evlist__add_default_attrs(struct perf_evlist *evlist, |
214 | struct perf_event_attr *attrs, size_t nr_attrs) | |
215 | { | |
216 | size_t i; | |
217 | ||
218 | for (i = 0; i < nr_attrs; i++) | |
219 | event_attr_init(attrs + i); | |
220 | ||
221 | return perf_evlist__add_attrs(evlist, attrs, nr_attrs); | |
222 | } | |
223 | ||
da378962 ACM |
224 | struct perf_evsel * |
225 | perf_evlist__find_tracepoint_by_id(struct perf_evlist *evlist, int id) | |
ee29be62 ACM |
226 | { |
227 | struct perf_evsel *evsel; | |
228 | ||
229 | list_for_each_entry(evsel, &evlist->entries, node) { | |
230 | if (evsel->attr.type == PERF_TYPE_TRACEPOINT && | |
231 | (int)evsel->attr.config == id) | |
232 | return evsel; | |
233 | } | |
234 | ||
235 | return NULL; | |
236 | } | |
237 | ||
a2f2804a DA |
238 | struct perf_evsel * |
239 | perf_evlist__find_tracepoint_by_name(struct perf_evlist *evlist, | |
240 | const char *name) | |
241 | { | |
242 | struct perf_evsel *evsel; | |
243 | ||
244 | list_for_each_entry(evsel, &evlist->entries, node) { | |
245 | if ((evsel->attr.type == PERF_TYPE_TRACEPOINT) && | |
246 | (strcmp(evsel->name, name) == 0)) | |
247 | return evsel; | |
248 | } | |
249 | ||
250 | return NULL; | |
251 | } | |
252 | ||
39876e7d ACM |
253 | int perf_evlist__add_newtp(struct perf_evlist *evlist, |
254 | const char *sys, const char *name, void *handler) | |
255 | { | |
ef503831 | 256 | struct perf_evsel *evsel = perf_evsel__newtp(sys, name); |
39876e7d | 257 | |
39876e7d ACM |
258 | if (evsel == NULL) |
259 | return -1; | |
260 | ||
744a9719 | 261 | evsel->handler = handler; |
39876e7d ACM |
262 | perf_evlist__add(evlist, evsel); |
263 | return 0; | |
264 | } | |
265 | ||
4152ab37 ACM |
266 | void perf_evlist__disable(struct perf_evlist *evlist) |
267 | { | |
268 | int cpu, thread; | |
269 | struct perf_evsel *pos; | |
b3a319d5 NK |
270 | int nr_cpus = cpu_map__nr(evlist->cpus); |
271 | int nr_threads = thread_map__nr(evlist->threads); | |
4152ab37 | 272 | |
b3a319d5 | 273 | for (cpu = 0; cpu < nr_cpus; cpu++) { |
4152ab37 | 274 | list_for_each_entry(pos, &evlist->entries, node) { |
395c3070 | 275 | if (!perf_evsel__is_group_leader(pos) || !pos->fd) |
3fe4430d | 276 | continue; |
b3a319d5 | 277 | for (thread = 0; thread < nr_threads; thread++) |
55da8005 NK |
278 | ioctl(FD(pos, cpu, thread), |
279 | PERF_EVENT_IOC_DISABLE, 0); | |
4152ab37 ACM |
280 | } |
281 | } | |
282 | } | |
283 | ||
764e16a3 DA |
284 | void perf_evlist__enable(struct perf_evlist *evlist) |
285 | { | |
286 | int cpu, thread; | |
287 | struct perf_evsel *pos; | |
b3a319d5 NK |
288 | int nr_cpus = cpu_map__nr(evlist->cpus); |
289 | int nr_threads = thread_map__nr(evlist->threads); | |
764e16a3 | 290 | |
b3a319d5 | 291 | for (cpu = 0; cpu < nr_cpus; cpu++) { |
764e16a3 | 292 | list_for_each_entry(pos, &evlist->entries, node) { |
395c3070 | 293 | if (!perf_evsel__is_group_leader(pos) || !pos->fd) |
3fe4430d | 294 | continue; |
b3a319d5 | 295 | for (thread = 0; thread < nr_threads; thread++) |
55da8005 NK |
296 | ioctl(FD(pos, cpu, thread), |
297 | PERF_EVENT_IOC_ENABLE, 0); | |
764e16a3 DA |
298 | } |
299 | } | |
300 | } | |
301 | ||
395c3070 AH |
302 | int perf_evlist__disable_event(struct perf_evlist *evlist, |
303 | struct perf_evsel *evsel) | |
304 | { | |
305 | int cpu, thread, err; | |
306 | ||
307 | if (!evsel->fd) | |
308 | return 0; | |
309 | ||
310 | for (cpu = 0; cpu < evlist->cpus->nr; cpu++) { | |
311 | for (thread = 0; thread < evlist->threads->nr; thread++) { | |
312 | err = ioctl(FD(evsel, cpu, thread), | |
313 | PERF_EVENT_IOC_DISABLE, 0); | |
314 | if (err) | |
315 | return err; | |
316 | } | |
317 | } | |
318 | return 0; | |
319 | } | |
320 | ||
321 | int perf_evlist__enable_event(struct perf_evlist *evlist, | |
322 | struct perf_evsel *evsel) | |
323 | { | |
324 | int cpu, thread, err; | |
325 | ||
326 | if (!evsel->fd) | |
327 | return -EINVAL; | |
328 | ||
329 | for (cpu = 0; cpu < evlist->cpus->nr; cpu++) { | |
330 | for (thread = 0; thread < evlist->threads->nr; thread++) { | |
331 | err = ioctl(FD(evsel, cpu, thread), | |
332 | PERF_EVENT_IOC_ENABLE, 0); | |
333 | if (err) | |
334 | return err; | |
335 | } | |
336 | } | |
337 | return 0; | |
338 | } | |
339 | ||
806fb630 | 340 | static int perf_evlist__alloc_pollfd(struct perf_evlist *evlist) |
5c581041 | 341 | { |
b3a319d5 NK |
342 | int nr_cpus = cpu_map__nr(evlist->cpus); |
343 | int nr_threads = thread_map__nr(evlist->threads); | |
344 | int nfds = nr_cpus * nr_threads * evlist->nr_entries; | |
5c581041 ACM |
345 | evlist->pollfd = malloc(sizeof(struct pollfd) * nfds); |
346 | return evlist->pollfd != NULL ? 0 : -ENOMEM; | |
347 | } | |
70082dd9 ACM |
348 | |
349 | void perf_evlist__add_pollfd(struct perf_evlist *evlist, int fd) | |
350 | { | |
351 | fcntl(fd, F_SETFL, O_NONBLOCK); | |
352 | evlist->pollfd[evlist->nr_fds].fd = fd; | |
353 | evlist->pollfd[evlist->nr_fds].events = POLLIN; | |
354 | evlist->nr_fds++; | |
355 | } | |
70db7533 | 356 | |
a91e5431 ACM |
357 | static void perf_evlist__id_hash(struct perf_evlist *evlist, |
358 | struct perf_evsel *evsel, | |
359 | int cpu, int thread, u64 id) | |
3d3b5e95 ACM |
360 | { |
361 | int hash; | |
362 | struct perf_sample_id *sid = SID(evsel, cpu, thread); | |
363 | ||
364 | sid->id = id; | |
365 | sid->evsel = evsel; | |
366 | hash = hash_64(sid->id, PERF_EVLIST__HLIST_BITS); | |
367 | hlist_add_head(&sid->node, &evlist->heads[hash]); | |
368 | } | |
369 | ||
a91e5431 ACM |
370 | void perf_evlist__id_add(struct perf_evlist *evlist, struct perf_evsel *evsel, |
371 | int cpu, int thread, u64 id) | |
372 | { | |
373 | perf_evlist__id_hash(evlist, evsel, cpu, thread, id); | |
374 | evsel->id[evsel->ids++] = id; | |
375 | } | |
376 | ||
377 | static int perf_evlist__id_add_fd(struct perf_evlist *evlist, | |
378 | struct perf_evsel *evsel, | |
379 | int cpu, int thread, int fd) | |
f8a95309 | 380 | { |
f8a95309 | 381 | u64 read_data[4] = { 0, }; |
3d3b5e95 | 382 | int id_idx = 1; /* The first entry is the counter value */ |
e2b5abe0 JO |
383 | u64 id; |
384 | int ret; | |
385 | ||
386 | ret = ioctl(fd, PERF_EVENT_IOC_ID, &id); | |
387 | if (!ret) | |
388 | goto add; | |
389 | ||
390 | if (errno != ENOTTY) | |
391 | return -1; | |
392 | ||
393 | /* Legacy way to get event id.. All hail to old kernels! */ | |
f8a95309 | 394 | |
c4861afe JO |
395 | /* |
396 | * This way does not work with group format read, so bail | |
397 | * out in that case. | |
398 | */ | |
399 | if (perf_evlist__read_format(evlist) & PERF_FORMAT_GROUP) | |
400 | return -1; | |
401 | ||
f8a95309 ACM |
402 | if (!(evsel->attr.read_format & PERF_FORMAT_ID) || |
403 | read(fd, &read_data, sizeof(read_data)) == -1) | |
404 | return -1; | |
405 | ||
406 | if (evsel->attr.read_format & PERF_FORMAT_TOTAL_TIME_ENABLED) | |
407 | ++id_idx; | |
408 | if (evsel->attr.read_format & PERF_FORMAT_TOTAL_TIME_RUNNING) | |
409 | ++id_idx; | |
410 | ||
e2b5abe0 JO |
411 | id = read_data[id_idx]; |
412 | ||
413 | add: | |
414 | perf_evlist__id_add(evlist, evsel, cpu, thread, id); | |
f8a95309 ACM |
415 | return 0; |
416 | } | |
417 | ||
932a3594 | 418 | struct perf_sample_id *perf_evlist__id2sid(struct perf_evlist *evlist, u64 id) |
70db7533 ACM |
419 | { |
420 | struct hlist_head *head; | |
70db7533 ACM |
421 | struct perf_sample_id *sid; |
422 | int hash; | |
423 | ||
70db7533 ACM |
424 | hash = hash_64(id, PERF_EVLIST__HLIST_BITS); |
425 | head = &evlist->heads[hash]; | |
426 | ||
b67bfe0d | 427 | hlist_for_each_entry(sid, head, node) |
70db7533 | 428 | if (sid->id == id) |
932a3594 JO |
429 | return sid; |
430 | ||
431 | return NULL; | |
432 | } | |
433 | ||
434 | struct perf_evsel *perf_evlist__id2evsel(struct perf_evlist *evlist, u64 id) | |
435 | { | |
436 | struct perf_sample_id *sid; | |
437 | ||
438 | if (evlist->nr_entries == 1) | |
439 | return perf_evlist__first(evlist); | |
440 | ||
441 | sid = perf_evlist__id2sid(evlist, id); | |
442 | if (sid) | |
443 | return sid->evsel; | |
30e68bcc NK |
444 | |
445 | if (!perf_evlist__sample_id_all(evlist)) | |
0c21f736 | 446 | return perf_evlist__first(evlist); |
30e68bcc | 447 | |
70db7533 ACM |
448 | return NULL; |
449 | } | |
04391deb | 450 | |
75562573 AH |
451 | static int perf_evlist__event2id(struct perf_evlist *evlist, |
452 | union perf_event *event, u64 *id) | |
453 | { | |
454 | const u64 *array = event->sample.array; | |
455 | ssize_t n; | |
456 | ||
457 | n = (event->header.size - sizeof(event->header)) >> 3; | |
458 | ||
459 | if (event->header.type == PERF_RECORD_SAMPLE) { | |
460 | if (evlist->id_pos >= n) | |
461 | return -1; | |
462 | *id = array[evlist->id_pos]; | |
463 | } else { | |
464 | if (evlist->is_pos > n) | |
465 | return -1; | |
466 | n -= evlist->is_pos; | |
467 | *id = array[n]; | |
468 | } | |
469 | return 0; | |
470 | } | |
471 | ||
472 | static struct perf_evsel *perf_evlist__event2evsel(struct perf_evlist *evlist, | |
473 | union perf_event *event) | |
474 | { | |
98be6966 | 475 | struct perf_evsel *first = perf_evlist__first(evlist); |
75562573 AH |
476 | struct hlist_head *head; |
477 | struct perf_sample_id *sid; | |
478 | int hash; | |
479 | u64 id; | |
480 | ||
481 | if (evlist->nr_entries == 1) | |
98be6966 AH |
482 | return first; |
483 | ||
484 | if (!first->attr.sample_id_all && | |
485 | event->header.type != PERF_RECORD_SAMPLE) | |
486 | return first; | |
75562573 AH |
487 | |
488 | if (perf_evlist__event2id(evlist, event, &id)) | |
489 | return NULL; | |
490 | ||
491 | /* Synthesized events have an id of zero */ | |
492 | if (!id) | |
98be6966 | 493 | return first; |
75562573 AH |
494 | |
495 | hash = hash_64(id, PERF_EVLIST__HLIST_BITS); | |
496 | head = &evlist->heads[hash]; | |
497 | ||
498 | hlist_for_each_entry(sid, head, node) { | |
499 | if (sid->id == id) | |
500 | return sid->evsel; | |
501 | } | |
502 | return NULL; | |
503 | } | |
504 | ||
aece948f | 505 | union perf_event *perf_evlist__mmap_read(struct perf_evlist *evlist, int idx) |
04391deb | 506 | { |
aece948f | 507 | struct perf_mmap *md = &evlist->mmap[idx]; |
04391deb ACM |
508 | unsigned int head = perf_mmap__read_head(md); |
509 | unsigned int old = md->prev; | |
510 | unsigned char *data = md->base + page_size; | |
8115d60c | 511 | union perf_event *event = NULL; |
04391deb | 512 | |
7bb41152 | 513 | if (evlist->overwrite) { |
04391deb | 514 | /* |
7bb41152 ACM |
515 | * If we're further behind than half the buffer, there's a chance |
516 | * the writer will bite our tail and mess up the samples under us. | |
517 | * | |
518 | * If we somehow ended up ahead of the head, we got messed up. | |
519 | * | |
520 | * In either case, truncate and restart at head. | |
04391deb | 521 | */ |
7bb41152 ACM |
522 | int diff = head - old; |
523 | if (diff > md->mask / 2 || diff < 0) { | |
524 | fprintf(stderr, "WARNING: failed to keep up with mmap data.\n"); | |
525 | ||
526 | /* | |
527 | * head points to a known good entry, start there. | |
528 | */ | |
529 | old = head; | |
530 | } | |
04391deb ACM |
531 | } |
532 | ||
533 | if (old != head) { | |
534 | size_t size; | |
535 | ||
8115d60c | 536 | event = (union perf_event *)&data[old & md->mask]; |
04391deb ACM |
537 | size = event->header.size; |
538 | ||
539 | /* | |
540 | * Event straddles the mmap boundary -- header should always | |
541 | * be inside due to u64 alignment of output. | |
542 | */ | |
543 | if ((old & md->mask) + size != ((old + size) & md->mask)) { | |
544 | unsigned int offset = old; | |
545 | unsigned int len = min(sizeof(*event), size), cpy; | |
a65cb4b9 | 546 | void *dst = md->event_copy; |
04391deb ACM |
547 | |
548 | do { | |
549 | cpy = min(md->mask + 1 - (offset & md->mask), len); | |
550 | memcpy(dst, &data[offset & md->mask], cpy); | |
551 | offset += cpy; | |
552 | dst += cpy; | |
553 | len -= cpy; | |
554 | } while (len); | |
555 | ||
a65cb4b9 | 556 | event = (union perf_event *) md->event_copy; |
04391deb ACM |
557 | } |
558 | ||
559 | old += size; | |
560 | } | |
561 | ||
562 | md->prev = old; | |
7bb41152 | 563 | |
04391deb ACM |
564 | return event; |
565 | } | |
f8a95309 | 566 | |
8e50d384 ZZ |
567 | void perf_evlist__mmap_consume(struct perf_evlist *evlist, int idx) |
568 | { | |
569 | if (!evlist->overwrite) { | |
570 | struct perf_mmap *md = &evlist->mmap[idx]; | |
571 | unsigned int old = md->prev; | |
572 | ||
573 | perf_mmap__write_tail(md, old); | |
574 | } | |
575 | } | |
576 | ||
93edcbd9 AH |
577 | static void __perf_evlist__munmap(struct perf_evlist *evlist, int idx) |
578 | { | |
579 | if (evlist->mmap[idx].base != NULL) { | |
580 | munmap(evlist->mmap[idx].base, evlist->mmap_len); | |
581 | evlist->mmap[idx].base = NULL; | |
582 | } | |
583 | } | |
584 | ||
7e2ed097 | 585 | void perf_evlist__munmap(struct perf_evlist *evlist) |
f8a95309 | 586 | { |
aece948f | 587 | int i; |
f8a95309 | 588 | |
93edcbd9 AH |
589 | for (i = 0; i < evlist->nr_mmaps; i++) |
590 | __perf_evlist__munmap(evlist, i); | |
aece948f | 591 | |
04662523 | 592 | zfree(&evlist->mmap); |
f8a95309 ACM |
593 | } |
594 | ||
806fb630 | 595 | static int perf_evlist__alloc_mmap(struct perf_evlist *evlist) |
f8a95309 | 596 | { |
a14bb7a6 | 597 | evlist->nr_mmaps = cpu_map__nr(evlist->cpus); |
ec1e7e43 | 598 | if (cpu_map__empty(evlist->cpus)) |
b3a319d5 | 599 | evlist->nr_mmaps = thread_map__nr(evlist->threads); |
aece948f | 600 | evlist->mmap = zalloc(evlist->nr_mmaps * sizeof(struct perf_mmap)); |
f8a95309 ACM |
601 | return evlist->mmap != NULL ? 0 : -ENOMEM; |
602 | } | |
603 | ||
bccdaba0 | 604 | static int __perf_evlist__mmap(struct perf_evlist *evlist, |
aece948f | 605 | int idx, int prot, int mask, int fd) |
f8a95309 | 606 | { |
aece948f ACM |
607 | evlist->mmap[idx].prev = 0; |
608 | evlist->mmap[idx].mask = mask; | |
609 | evlist->mmap[idx].base = mmap(NULL, evlist->mmap_len, prot, | |
f8a95309 | 610 | MAP_SHARED, fd, 0); |
301b195d | 611 | if (evlist->mmap[idx].base == MAP_FAILED) { |
02635965 AH |
612 | pr_debug2("failed to mmap perf event ring buffer, error %d\n", |
613 | errno); | |
301b195d | 614 | evlist->mmap[idx].base = NULL; |
f8a95309 | 615 | return -1; |
301b195d | 616 | } |
f8a95309 ACM |
617 | |
618 | perf_evlist__add_pollfd(evlist, fd); | |
619 | return 0; | |
620 | } | |
621 | ||
04e21314 AH |
622 | static int perf_evlist__mmap_per_evsel(struct perf_evlist *evlist, int idx, |
623 | int prot, int mask, int cpu, int thread, | |
624 | int *output) | |
aece948f ACM |
625 | { |
626 | struct perf_evsel *evsel; | |
04e21314 AH |
627 | |
628 | list_for_each_entry(evsel, &evlist->entries, node) { | |
629 | int fd = FD(evsel, cpu, thread); | |
630 | ||
631 | if (*output == -1) { | |
632 | *output = fd; | |
633 | if (__perf_evlist__mmap(evlist, idx, prot, mask, | |
634 | *output) < 0) | |
635 | return -1; | |
636 | } else { | |
637 | if (ioctl(fd, PERF_EVENT_IOC_SET_OUTPUT, *output) != 0) | |
638 | return -1; | |
639 | } | |
640 | ||
641 | if ((evsel->attr.read_format & PERF_FORMAT_ID) && | |
642 | perf_evlist__id_add_fd(evlist, evsel, cpu, thread, fd) < 0) | |
643 | return -1; | |
644 | } | |
645 | ||
646 | return 0; | |
647 | } | |
648 | ||
649 | static int perf_evlist__mmap_per_cpu(struct perf_evlist *evlist, int prot, | |
650 | int mask) | |
651 | { | |
aece948f | 652 | int cpu, thread; |
b3a319d5 NK |
653 | int nr_cpus = cpu_map__nr(evlist->cpus); |
654 | int nr_threads = thread_map__nr(evlist->threads); | |
aece948f | 655 | |
e3e1a54f | 656 | pr_debug2("perf event ring buffer mmapped per cpu\n"); |
b3a319d5 | 657 | for (cpu = 0; cpu < nr_cpus; cpu++) { |
aece948f ACM |
658 | int output = -1; |
659 | ||
b3a319d5 | 660 | for (thread = 0; thread < nr_threads; thread++) { |
04e21314 AH |
661 | if (perf_evlist__mmap_per_evsel(evlist, cpu, prot, mask, |
662 | cpu, thread, &output)) | |
663 | goto out_unmap; | |
aece948f ACM |
664 | } |
665 | } | |
666 | ||
667 | return 0; | |
668 | ||
669 | out_unmap: | |
93edcbd9 AH |
670 | for (cpu = 0; cpu < nr_cpus; cpu++) |
671 | __perf_evlist__munmap(evlist, cpu); | |
aece948f ACM |
672 | return -1; |
673 | } | |
674 | ||
04e21314 AH |
675 | static int perf_evlist__mmap_per_thread(struct perf_evlist *evlist, int prot, |
676 | int mask) | |
aece948f | 677 | { |
aece948f | 678 | int thread; |
b3a319d5 | 679 | int nr_threads = thread_map__nr(evlist->threads); |
aece948f | 680 | |
e3e1a54f | 681 | pr_debug2("perf event ring buffer mmapped per thread\n"); |
b3a319d5 | 682 | for (thread = 0; thread < nr_threads; thread++) { |
aece948f ACM |
683 | int output = -1; |
684 | ||
04e21314 AH |
685 | if (perf_evlist__mmap_per_evsel(evlist, thread, prot, mask, 0, |
686 | thread, &output)) | |
687 | goto out_unmap; | |
aece948f ACM |
688 | } |
689 | ||
690 | return 0; | |
691 | ||
692 | out_unmap: | |
93edcbd9 AH |
693 | for (thread = 0; thread < nr_threads; thread++) |
694 | __perf_evlist__munmap(evlist, thread); | |
aece948f ACM |
695 | return -1; |
696 | } | |
697 | ||
994a1f78 JO |
698 | static size_t perf_evlist__mmap_size(unsigned long pages) |
699 | { | |
700 | /* 512 kiB: default amount of unprivileged mlocked memory */ | |
701 | if (pages == UINT_MAX) | |
702 | pages = (512 * 1024) / page_size; | |
703 | else if (!is_power_of_2(pages)) | |
704 | return 0; | |
705 | ||
706 | return (pages + 1) * page_size; | |
707 | } | |
708 | ||
33c2dcfd DA |
709 | static long parse_pages_arg(const char *str, unsigned long min, |
710 | unsigned long max) | |
994a1f78 | 711 | { |
2fbe4abe | 712 | unsigned long pages, val; |
27050f53 JO |
713 | static struct parse_tag tags[] = { |
714 | { .tag = 'B', .mult = 1 }, | |
715 | { .tag = 'K', .mult = 1 << 10 }, | |
716 | { .tag = 'M', .mult = 1 << 20 }, | |
717 | { .tag = 'G', .mult = 1 << 30 }, | |
718 | { .tag = 0 }, | |
719 | }; | |
994a1f78 | 720 | |
8973504b | 721 | if (str == NULL) |
33c2dcfd | 722 | return -EINVAL; |
8973504b | 723 | |
27050f53 | 724 | val = parse_tag_value(str, tags); |
2fbe4abe | 725 | if (val != (unsigned long) -1) { |
27050f53 JO |
726 | /* we got file size value */ |
727 | pages = PERF_ALIGN(val, page_size) / page_size; | |
27050f53 JO |
728 | } else { |
729 | /* we got pages count value */ | |
730 | char *eptr; | |
731 | pages = strtoul(str, &eptr, 10); | |
33c2dcfd DA |
732 | if (*eptr != '\0') |
733 | return -EINVAL; | |
994a1f78 JO |
734 | } |
735 | ||
2bcab6c1 | 736 | if (pages == 0 && min == 0) { |
33c2dcfd | 737 | /* leave number of pages at 0 */ |
1dbfa938 | 738 | } else if (!is_power_of_2(pages)) { |
33c2dcfd | 739 | /* round pages up to next power of 2 */ |
1dbfa938 AH |
740 | pages = next_pow2_l(pages); |
741 | if (!pages) | |
742 | return -EINVAL; | |
9639837e DA |
743 | pr_info("rounding mmap pages size to %lu bytes (%lu pages)\n", |
744 | pages * page_size, pages); | |
2fbe4abe AH |
745 | } |
746 | ||
33c2dcfd DA |
747 | if (pages > max) |
748 | return -EINVAL; | |
749 | ||
750 | return pages; | |
751 | } | |
752 | ||
753 | int perf_evlist__parse_mmap_pages(const struct option *opt, const char *str, | |
754 | int unset __maybe_unused) | |
755 | { | |
756 | unsigned int *mmap_pages = opt->value; | |
757 | unsigned long max = UINT_MAX; | |
758 | long pages; | |
759 | ||
f5ae9c42 | 760 | if (max > SIZE_MAX / page_size) |
33c2dcfd DA |
761 | max = SIZE_MAX / page_size; |
762 | ||
763 | pages = parse_pages_arg(str, 1, max); | |
764 | if (pages < 0) { | |
765 | pr_err("Invalid argument for --mmap_pages/-m\n"); | |
994a1f78 JO |
766 | return -1; |
767 | } | |
768 | ||
769 | *mmap_pages = pages; | |
770 | return 0; | |
771 | } | |
772 | ||
c83fa7f2 AH |
773 | /** |
774 | * perf_evlist__mmap - Create mmaps to receive events. | |
775 | * @evlist: list of events | |
776 | * @pages: map length in pages | |
777 | * @overwrite: overwrite older events? | |
f8a95309 | 778 | * |
c83fa7f2 AH |
779 | * If @overwrite is %false the user needs to signal event consumption using |
780 | * perf_mmap__write_tail(). Using perf_evlist__mmap_read() does this | |
781 | * automatically. | |
7e2ed097 | 782 | * |
c83fa7f2 | 783 | * Return: %0 on success, negative error code otherwise. |
f8a95309 | 784 | */ |
50a682ce ACM |
785 | int perf_evlist__mmap(struct perf_evlist *evlist, unsigned int pages, |
786 | bool overwrite) | |
f8a95309 | 787 | { |
aece948f | 788 | struct perf_evsel *evsel; |
7e2ed097 ACM |
789 | const struct cpu_map *cpus = evlist->cpus; |
790 | const struct thread_map *threads = evlist->threads; | |
50a682ce ACM |
791 | int prot = PROT_READ | (overwrite ? 0 : PROT_WRITE), mask; |
792 | ||
7e2ed097 | 793 | if (evlist->mmap == NULL && perf_evlist__alloc_mmap(evlist) < 0) |
f8a95309 ACM |
794 | return -ENOMEM; |
795 | ||
7e2ed097 | 796 | if (evlist->pollfd == NULL && perf_evlist__alloc_pollfd(evlist) < 0) |
f8a95309 ACM |
797 | return -ENOMEM; |
798 | ||
799 | evlist->overwrite = overwrite; | |
994a1f78 | 800 | evlist->mmap_len = perf_evlist__mmap_size(pages); |
2af68ef5 | 801 | pr_debug("mmap size %zuB\n", evlist->mmap_len); |
994a1f78 | 802 | mask = evlist->mmap_len - page_size - 1; |
f8a95309 ACM |
803 | |
804 | list_for_each_entry(evsel, &evlist->entries, node) { | |
805 | if ((evsel->attr.read_format & PERF_FORMAT_ID) && | |
a91e5431 | 806 | evsel->sample_id == NULL && |
a14bb7a6 | 807 | perf_evsel__alloc_id(evsel, cpu_map__nr(cpus), threads->nr) < 0) |
f8a95309 | 808 | return -ENOMEM; |
f8a95309 ACM |
809 | } |
810 | ||
ec1e7e43 | 811 | if (cpu_map__empty(cpus)) |
aece948f | 812 | return perf_evlist__mmap_per_thread(evlist, prot, mask); |
f8a95309 | 813 | |
aece948f | 814 | return perf_evlist__mmap_per_cpu(evlist, prot, mask); |
f8a95309 | 815 | } |
7e2ed097 | 816 | |
602ad878 | 817 | int perf_evlist__create_maps(struct perf_evlist *evlist, struct target *target) |
7e2ed097 | 818 | { |
b809ac10 NK |
819 | evlist->threads = thread_map__new_str(target->pid, target->tid, |
820 | target->uid); | |
7e2ed097 ACM |
821 | |
822 | if (evlist->threads == NULL) | |
823 | return -1; | |
824 | ||
9c105fbc | 825 | if (target__uses_dummy_map(target)) |
d1cb9fce | 826 | evlist->cpus = cpu_map__dummy_new(); |
879d77d0 NK |
827 | else |
828 | evlist->cpus = cpu_map__new(target->cpu_list); | |
7e2ed097 ACM |
829 | |
830 | if (evlist->cpus == NULL) | |
831 | goto out_delete_threads; | |
832 | ||
833 | return 0; | |
834 | ||
835 | out_delete_threads: | |
836 | thread_map__delete(evlist->threads); | |
837 | return -1; | |
838 | } | |
839 | ||
1491a632 | 840 | int perf_evlist__apply_filters(struct perf_evlist *evlist) |
0a102479 | 841 | { |
0a102479 | 842 | struct perf_evsel *evsel; |
745cefc5 ACM |
843 | int err = 0; |
844 | const int ncpus = cpu_map__nr(evlist->cpus), | |
b3a319d5 | 845 | nthreads = thread_map__nr(evlist->threads); |
0a102479 FW |
846 | |
847 | list_for_each_entry(evsel, &evlist->entries, node) { | |
745cefc5 | 848 | if (evsel->filter == NULL) |
0a102479 | 849 | continue; |
745cefc5 ACM |
850 | |
851 | err = perf_evsel__set_filter(evsel, ncpus, nthreads, evsel->filter); | |
852 | if (err) | |
853 | break; | |
0a102479 FW |
854 | } |
855 | ||
745cefc5 ACM |
856 | return err; |
857 | } | |
858 | ||
859 | int perf_evlist__set_filter(struct perf_evlist *evlist, const char *filter) | |
860 | { | |
861 | struct perf_evsel *evsel; | |
862 | int err = 0; | |
863 | const int ncpus = cpu_map__nr(evlist->cpus), | |
b3a319d5 | 864 | nthreads = thread_map__nr(evlist->threads); |
745cefc5 ACM |
865 | |
866 | list_for_each_entry(evsel, &evlist->entries, node) { | |
867 | err = perf_evsel__set_filter(evsel, ncpus, nthreads, filter); | |
868 | if (err) | |
869 | break; | |
870 | } | |
871 | ||
872 | return err; | |
0a102479 | 873 | } |
74429964 | 874 | |
0c21f736 | 875 | bool perf_evlist__valid_sample_type(struct perf_evlist *evlist) |
74429964 | 876 | { |
75562573 | 877 | struct perf_evsel *pos; |
c2a70653 | 878 | |
75562573 AH |
879 | if (evlist->nr_entries == 1) |
880 | return true; | |
881 | ||
882 | if (evlist->id_pos < 0 || evlist->is_pos < 0) | |
883 | return false; | |
884 | ||
885 | list_for_each_entry(pos, &evlist->entries, node) { | |
886 | if (pos->id_pos != evlist->id_pos || | |
887 | pos->is_pos != evlist->is_pos) | |
c2a70653 | 888 | return false; |
74429964 FW |
889 | } |
890 | ||
c2a70653 | 891 | return true; |
74429964 FW |
892 | } |
893 | ||
75562573 | 894 | u64 __perf_evlist__combined_sample_type(struct perf_evlist *evlist) |
c2a70653 | 895 | { |
75562573 AH |
896 | struct perf_evsel *evsel; |
897 | ||
898 | if (evlist->combined_sample_type) | |
899 | return evlist->combined_sample_type; | |
900 | ||
901 | list_for_each_entry(evsel, &evlist->entries, node) | |
902 | evlist->combined_sample_type |= evsel->attr.sample_type; | |
903 | ||
904 | return evlist->combined_sample_type; | |
905 | } | |
906 | ||
907 | u64 perf_evlist__combined_sample_type(struct perf_evlist *evlist) | |
908 | { | |
909 | evlist->combined_sample_type = 0; | |
910 | return __perf_evlist__combined_sample_type(evlist); | |
c2a70653 ACM |
911 | } |
912 | ||
9ede473c JO |
913 | bool perf_evlist__valid_read_format(struct perf_evlist *evlist) |
914 | { | |
915 | struct perf_evsel *first = perf_evlist__first(evlist), *pos = first; | |
916 | u64 read_format = first->attr.read_format; | |
917 | u64 sample_type = first->attr.sample_type; | |
918 | ||
919 | list_for_each_entry_continue(pos, &evlist->entries, node) { | |
920 | if (read_format != pos->attr.read_format) | |
921 | return false; | |
922 | } | |
923 | ||
924 | /* PERF_SAMPLE_READ imples PERF_FORMAT_ID. */ | |
925 | if ((sample_type & PERF_SAMPLE_READ) && | |
926 | !(read_format & PERF_FORMAT_ID)) { | |
927 | return false; | |
928 | } | |
929 | ||
930 | return true; | |
931 | } | |
932 | ||
933 | u64 perf_evlist__read_format(struct perf_evlist *evlist) | |
934 | { | |
935 | struct perf_evsel *first = perf_evlist__first(evlist); | |
936 | return first->attr.read_format; | |
937 | } | |
938 | ||
0c21f736 | 939 | u16 perf_evlist__id_hdr_size(struct perf_evlist *evlist) |
81e36bff | 940 | { |
0c21f736 | 941 | struct perf_evsel *first = perf_evlist__first(evlist); |
81e36bff ACM |
942 | struct perf_sample *data; |
943 | u64 sample_type; | |
944 | u16 size = 0; | |
945 | ||
81e36bff ACM |
946 | if (!first->attr.sample_id_all) |
947 | goto out; | |
948 | ||
949 | sample_type = first->attr.sample_type; | |
950 | ||
951 | if (sample_type & PERF_SAMPLE_TID) | |
952 | size += sizeof(data->tid) * 2; | |
953 | ||
954 | if (sample_type & PERF_SAMPLE_TIME) | |
955 | size += sizeof(data->time); | |
956 | ||
957 | if (sample_type & PERF_SAMPLE_ID) | |
958 | size += sizeof(data->id); | |
959 | ||
960 | if (sample_type & PERF_SAMPLE_STREAM_ID) | |
961 | size += sizeof(data->stream_id); | |
962 | ||
963 | if (sample_type & PERF_SAMPLE_CPU) | |
964 | size += sizeof(data->cpu) * 2; | |
75562573 AH |
965 | |
966 | if (sample_type & PERF_SAMPLE_IDENTIFIER) | |
967 | size += sizeof(data->id); | |
81e36bff ACM |
968 | out: |
969 | return size; | |
970 | } | |
971 | ||
0c21f736 | 972 | bool perf_evlist__valid_sample_id_all(struct perf_evlist *evlist) |
74429964 | 973 | { |
0c21f736 | 974 | struct perf_evsel *first = perf_evlist__first(evlist), *pos = first; |
c2a70653 ACM |
975 | |
976 | list_for_each_entry_continue(pos, &evlist->entries, node) { | |
977 | if (first->attr.sample_id_all != pos->attr.sample_id_all) | |
978 | return false; | |
74429964 FW |
979 | } |
980 | ||
c2a70653 ACM |
981 | return true; |
982 | } | |
983 | ||
0c21f736 | 984 | bool perf_evlist__sample_id_all(struct perf_evlist *evlist) |
c2a70653 | 985 | { |
0c21f736 | 986 | struct perf_evsel *first = perf_evlist__first(evlist); |
c2a70653 | 987 | return first->attr.sample_id_all; |
74429964 | 988 | } |
81cce8de ACM |
989 | |
990 | void perf_evlist__set_selected(struct perf_evlist *evlist, | |
991 | struct perf_evsel *evsel) | |
992 | { | |
993 | evlist->selected = evsel; | |
994 | } | |
727ab04e | 995 | |
a74b4b66 NK |
996 | void perf_evlist__close(struct perf_evlist *evlist) |
997 | { | |
998 | struct perf_evsel *evsel; | |
999 | int ncpus = cpu_map__nr(evlist->cpus); | |
1000 | int nthreads = thread_map__nr(evlist->threads); | |
1001 | ||
1002 | list_for_each_entry_reverse(evsel, &evlist->entries, node) | |
1003 | perf_evsel__close(evsel, ncpus, nthreads); | |
1004 | } | |
1005 | ||
6a4bb04c | 1006 | int perf_evlist__open(struct perf_evlist *evlist) |
727ab04e | 1007 | { |
6a4bb04c | 1008 | struct perf_evsel *evsel; |
a74b4b66 | 1009 | int err; |
727ab04e | 1010 | |
733cd2fe AH |
1011 | perf_evlist__update_id_pos(evlist); |
1012 | ||
727ab04e | 1013 | list_for_each_entry(evsel, &evlist->entries, node) { |
6a4bb04c | 1014 | err = perf_evsel__open(evsel, evlist->cpus, evlist->threads); |
727ab04e ACM |
1015 | if (err < 0) |
1016 | goto out_err; | |
1017 | } | |
1018 | ||
1019 | return 0; | |
1020 | out_err: | |
a74b4b66 | 1021 | perf_evlist__close(evlist); |
41c21a68 | 1022 | errno = -err; |
727ab04e ACM |
1023 | return err; |
1024 | } | |
35b9d88e | 1025 | |
602ad878 | 1026 | int perf_evlist__prepare_workload(struct perf_evlist *evlist, struct target *target, |
55e162ea | 1027 | const char *argv[], bool pipe_output, |
735f7e0b | 1028 | void (*exec_error)(int signo, siginfo_t *info, void *ucontext)) |
35b9d88e ACM |
1029 | { |
1030 | int child_ready_pipe[2], go_pipe[2]; | |
1031 | char bf; | |
1032 | ||
1033 | if (pipe(child_ready_pipe) < 0) { | |
1034 | perror("failed to create 'ready' pipe"); | |
1035 | return -1; | |
1036 | } | |
1037 | ||
1038 | if (pipe(go_pipe) < 0) { | |
1039 | perror("failed to create 'go' pipe"); | |
1040 | goto out_close_ready_pipe; | |
1041 | } | |
1042 | ||
1043 | evlist->workload.pid = fork(); | |
1044 | if (evlist->workload.pid < 0) { | |
1045 | perror("failed to fork"); | |
1046 | goto out_close_pipes; | |
1047 | } | |
1048 | ||
1049 | if (!evlist->workload.pid) { | |
119fa3c9 | 1050 | if (pipe_output) |
35b9d88e ACM |
1051 | dup2(2, 1); |
1052 | ||
0817df08 DA |
1053 | signal(SIGTERM, SIG_DFL); |
1054 | ||
35b9d88e ACM |
1055 | close(child_ready_pipe[0]); |
1056 | close(go_pipe[1]); | |
1057 | fcntl(go_pipe[0], F_SETFD, FD_CLOEXEC); | |
1058 | ||
35b9d88e ACM |
1059 | /* |
1060 | * Tell the parent we're ready to go | |
1061 | */ | |
1062 | close(child_ready_pipe[1]); | |
1063 | ||
1064 | /* | |
1065 | * Wait until the parent tells us to go. | |
1066 | */ | |
1067 | if (read(go_pipe[0], &bf, 1) == -1) | |
1068 | perror("unable to read pipe"); | |
1069 | ||
1070 | execvp(argv[0], (char **)argv); | |
1071 | ||
735f7e0b | 1072 | if (exec_error) { |
f33cbe72 ACM |
1073 | union sigval val; |
1074 | ||
1075 | val.sival_int = errno; | |
1076 | if (sigqueue(getppid(), SIGUSR1, val)) | |
1077 | perror(argv[0]); | |
1078 | } else | |
1079 | perror(argv[0]); | |
35b9d88e ACM |
1080 | exit(-1); |
1081 | } | |
1082 | ||
735f7e0b ACM |
1083 | if (exec_error) { |
1084 | struct sigaction act = { | |
1085 | .sa_flags = SA_SIGINFO, | |
1086 | .sa_sigaction = exec_error, | |
1087 | }; | |
1088 | sigaction(SIGUSR1, &act, NULL); | |
1089 | } | |
1090 | ||
602ad878 | 1091 | if (target__none(target)) |
35b9d88e ACM |
1092 | evlist->threads->map[0] = evlist->workload.pid; |
1093 | ||
1094 | close(child_ready_pipe[1]); | |
1095 | close(go_pipe[0]); | |
1096 | /* | |
1097 | * wait for child to settle | |
1098 | */ | |
1099 | if (read(child_ready_pipe[0], &bf, 1) == -1) { | |
1100 | perror("unable to read pipe"); | |
1101 | goto out_close_pipes; | |
1102 | } | |
1103 | ||
bcf3145f | 1104 | fcntl(go_pipe[1], F_SETFD, FD_CLOEXEC); |
35b9d88e ACM |
1105 | evlist->workload.cork_fd = go_pipe[1]; |
1106 | close(child_ready_pipe[0]); | |
1107 | return 0; | |
1108 | ||
1109 | out_close_pipes: | |
1110 | close(go_pipe[0]); | |
1111 | close(go_pipe[1]); | |
1112 | out_close_ready_pipe: | |
1113 | close(child_ready_pipe[0]); | |
1114 | close(child_ready_pipe[1]); | |
1115 | return -1; | |
1116 | } | |
1117 | ||
1118 | int perf_evlist__start_workload(struct perf_evlist *evlist) | |
1119 | { | |
1120 | if (evlist->workload.cork_fd > 0) { | |
b3824404 | 1121 | char bf = 0; |
bcf3145f | 1122 | int ret; |
35b9d88e ACM |
1123 | /* |
1124 | * Remove the cork, let it rip! | |
1125 | */ | |
bcf3145f NK |
1126 | ret = write(evlist->workload.cork_fd, &bf, 1); |
1127 | if (ret < 0) | |
1128 | perror("enable to write to pipe"); | |
1129 | ||
1130 | close(evlist->workload.cork_fd); | |
1131 | return ret; | |
35b9d88e ACM |
1132 | } |
1133 | ||
1134 | return 0; | |
1135 | } | |
cb0b29e0 | 1136 | |
a3f698fe | 1137 | int perf_evlist__parse_sample(struct perf_evlist *evlist, union perf_event *event, |
0807d2d8 | 1138 | struct perf_sample *sample) |
cb0b29e0 | 1139 | { |
75562573 AH |
1140 | struct perf_evsel *evsel = perf_evlist__event2evsel(evlist, event); |
1141 | ||
1142 | if (!evsel) | |
1143 | return -EFAULT; | |
0807d2d8 | 1144 | return perf_evsel__parse_sample(evsel, event, sample); |
cb0b29e0 | 1145 | } |
78f067b3 ACM |
1146 | |
1147 | size_t perf_evlist__fprintf(struct perf_evlist *evlist, FILE *fp) | |
1148 | { | |
1149 | struct perf_evsel *evsel; | |
1150 | size_t printed = 0; | |
1151 | ||
1152 | list_for_each_entry(evsel, &evlist->entries, node) { | |
1153 | printed += fprintf(fp, "%s%s", evsel->idx ? ", " : "", | |
1154 | perf_evsel__name(evsel)); | |
1155 | } | |
1156 | ||
b2222139 | 1157 | return printed + fprintf(fp, "\n"); |
78f067b3 | 1158 | } |
6ef068cb ACM |
1159 | |
1160 | int perf_evlist__strerror_tp(struct perf_evlist *evlist __maybe_unused, | |
1161 | int err, char *buf, size_t size) | |
1162 | { | |
1163 | char sbuf[128]; | |
1164 | ||
1165 | switch (err) { | |
1166 | case ENOENT: | |
1167 | scnprintf(buf, size, "%s", | |
1168 | "Error:\tUnable to find debugfs\n" | |
1169 | "Hint:\tWas your kernel was compiled with debugfs support?\n" | |
1170 | "Hint:\tIs the debugfs filesystem mounted?\n" | |
1171 | "Hint:\tTry 'sudo mount -t debugfs nodev /sys/kernel/debug'"); | |
1172 | break; | |
1173 | case EACCES: | |
1174 | scnprintf(buf, size, | |
1175 | "Error:\tNo permissions to read %s/tracing/events/raw_syscalls\n" | |
1176 | "Hint:\tTry 'sudo mount -o remount,mode=755 %s'\n", | |
1177 | debugfs_mountpoint, debugfs_mountpoint); | |
1178 | break; | |
1179 | default: | |
1180 | scnprintf(buf, size, "%s", strerror_r(err, sbuf, sizeof(sbuf))); | |
1181 | break; | |
1182 | } | |
1183 | ||
1184 | return 0; | |
1185 | } | |
a8f23d8f ACM |
1186 | |
1187 | int perf_evlist__strerror_open(struct perf_evlist *evlist __maybe_unused, | |
1188 | int err, char *buf, size_t size) | |
1189 | { | |
1190 | int printed, value; | |
1191 | char sbuf[128], *emsg = strerror_r(err, sbuf, sizeof(sbuf)); | |
1192 | ||
1193 | switch (err) { | |
1194 | case EACCES: | |
1195 | case EPERM: | |
1196 | printed = scnprintf(buf, size, | |
1197 | "Error:\t%s.\n" | |
1198 | "Hint:\tCheck /proc/sys/kernel/perf_event_paranoid setting.", emsg); | |
1199 | ||
1a47245d | 1200 | value = perf_event_paranoid(); |
a8f23d8f ACM |
1201 | |
1202 | printed += scnprintf(buf + printed, size - printed, "\nHint:\t"); | |
1203 | ||
1204 | if (value >= 2) { | |
1205 | printed += scnprintf(buf + printed, size - printed, | |
1206 | "For your workloads it needs to be <= 1\nHint:\t"); | |
1207 | } | |
1208 | printed += scnprintf(buf + printed, size - printed, | |
1209 | "For system wide tracing it needs to be set to -1"); | |
1210 | ||
1211 | printed += scnprintf(buf + printed, size - printed, | |
1212 | ".\nHint:\tThe current value is %d.", value); | |
1213 | break; | |
1214 | default: | |
1215 | scnprintf(buf, size, "%s", emsg); | |
1216 | break; | |
1217 | } | |
1218 | ||
1219 | return 0; | |
1220 | } | |
a025e4f0 AH |
1221 | |
1222 | void perf_evlist__to_front(struct perf_evlist *evlist, | |
1223 | struct perf_evsel *move_evsel) | |
1224 | { | |
1225 | struct perf_evsel *evsel, *n; | |
1226 | LIST_HEAD(move); | |
1227 | ||
1228 | if (move_evsel == perf_evlist__first(evlist)) | |
1229 | return; | |
1230 | ||
1231 | list_for_each_entry_safe(evsel, n, &evlist->entries, node) { | |
1232 | if (evsel->leader == move_evsel->leader) | |
1233 | list_move_tail(&evsel->node, &move); | |
1234 | } | |
1235 | ||
1236 | list_splice(&move, &evlist->entries); | |
1237 | } |