Commit | Line | Data |
---|---|---|
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" |
85c66be1 | 10 | #include <lk/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 ACM |
20 | #include "parse-events.h" |
21 | ||
f8a95309 ACM |
22 | #include <sys/mman.h> |
23 | ||
70db7533 ACM |
24 | #include <linux/bitops.h> |
25 | #include <linux/hash.h> | |
26 | ||
f8a95309 | 27 | #define FD(e, x, y) (*(int *)xyarray__entry(e->fd, x, y)) |
a91e5431 | 28 | #define SID(e, x, y) xyarray__entry(e->sample_id, x, y) |
f8a95309 | 29 | |
7e2ed097 ACM |
30 | void perf_evlist__init(struct perf_evlist *evlist, struct cpu_map *cpus, |
31 | struct thread_map *threads) | |
ef1d1af2 ACM |
32 | { |
33 | int i; | |
34 | ||
35 | for (i = 0; i < PERF_EVLIST__HLIST_SIZE; ++i) | |
36 | INIT_HLIST_HEAD(&evlist->heads[i]); | |
37 | INIT_LIST_HEAD(&evlist->entries); | |
7e2ed097 | 38 | perf_evlist__set_maps(evlist, cpus, threads); |
35b9d88e | 39 | evlist->workload.pid = -1; |
ef1d1af2 ACM |
40 | } |
41 | ||
334fe7a3 | 42 | struct perf_evlist *perf_evlist__new(void) |
361c99a6 ACM |
43 | { |
44 | struct perf_evlist *evlist = zalloc(sizeof(*evlist)); | |
45 | ||
ef1d1af2 | 46 | if (evlist != NULL) |
334fe7a3 | 47 | perf_evlist__init(evlist, NULL, NULL); |
361c99a6 ACM |
48 | |
49 | return evlist; | |
50 | } | |
51 | ||
52 | static void perf_evlist__purge(struct perf_evlist *evlist) | |
53 | { | |
54 | struct perf_evsel *pos, *n; | |
55 | ||
56 | list_for_each_entry_safe(pos, n, &evlist->entries, node) { | |
57 | list_del_init(&pos->node); | |
58 | perf_evsel__delete(pos); | |
59 | } | |
60 | ||
61 | evlist->nr_entries = 0; | |
62 | } | |
63 | ||
ef1d1af2 | 64 | void perf_evlist__exit(struct perf_evlist *evlist) |
361c99a6 | 65 | { |
70db7533 | 66 | free(evlist->mmap); |
5c581041 | 67 | free(evlist->pollfd); |
ef1d1af2 ACM |
68 | evlist->mmap = NULL; |
69 | evlist->pollfd = NULL; | |
70 | } | |
71 | ||
72 | void perf_evlist__delete(struct perf_evlist *evlist) | |
73 | { | |
74 | perf_evlist__purge(evlist); | |
75 | perf_evlist__exit(evlist); | |
361c99a6 ACM |
76 | free(evlist); |
77 | } | |
78 | ||
79 | void perf_evlist__add(struct perf_evlist *evlist, struct perf_evsel *entry) | |
80 | { | |
81 | list_add_tail(&entry->node, &evlist->entries); | |
82 | ++evlist->nr_entries; | |
83 | } | |
84 | ||
0529bc1f JO |
85 | void perf_evlist__splice_list_tail(struct perf_evlist *evlist, |
86 | struct list_head *list, | |
87 | int nr_entries) | |
50d08e47 ACM |
88 | { |
89 | list_splice_tail(list, &evlist->entries); | |
90 | evlist->nr_entries += nr_entries; | |
91 | } | |
92 | ||
63dab225 ACM |
93 | void __perf_evlist__set_leader(struct list_head *list) |
94 | { | |
95 | struct perf_evsel *evsel, *leader; | |
96 | ||
97 | leader = list_entry(list->next, struct perf_evsel, node); | |
97f63e4a NK |
98 | evsel = list_entry(list->prev, struct perf_evsel, node); |
99 | ||
100 | leader->nr_members = evsel->idx - leader->idx + 1; | |
63dab225 ACM |
101 | |
102 | list_for_each_entry(evsel, list, node) { | |
74b2133d | 103 | evsel->leader = leader; |
63dab225 ACM |
104 | } |
105 | } | |
106 | ||
107 | void perf_evlist__set_leader(struct perf_evlist *evlist) | |
6a4bb04c | 108 | { |
97f63e4a NK |
109 | if (evlist->nr_entries) { |
110 | evlist->nr_groups = evlist->nr_entries > 1 ? 1 : 0; | |
63dab225 | 111 | __perf_evlist__set_leader(&evlist->entries); |
97f63e4a | 112 | } |
6a4bb04c JO |
113 | } |
114 | ||
361c99a6 ACM |
115 | int perf_evlist__add_default(struct perf_evlist *evlist) |
116 | { | |
117 | struct perf_event_attr attr = { | |
118 | .type = PERF_TYPE_HARDWARE, | |
119 | .config = PERF_COUNT_HW_CPU_CYCLES, | |
120 | }; | |
1aed2671 JR |
121 | struct perf_evsel *evsel; |
122 | ||
123 | event_attr_init(&attr); | |
361c99a6 | 124 | |
1aed2671 | 125 | evsel = perf_evsel__new(&attr, 0); |
361c99a6 | 126 | if (evsel == NULL) |
cc2d86b0 SE |
127 | goto error; |
128 | ||
129 | /* use strdup() because free(evsel) assumes name is allocated */ | |
130 | evsel->name = strdup("cycles"); | |
131 | if (!evsel->name) | |
132 | goto error_free; | |
361c99a6 ACM |
133 | |
134 | perf_evlist__add(evlist, evsel); | |
135 | return 0; | |
cc2d86b0 SE |
136 | error_free: |
137 | perf_evsel__delete(evsel); | |
138 | error: | |
139 | return -ENOMEM; | |
361c99a6 | 140 | } |
5c581041 | 141 | |
e60fc847 ACM |
142 | static int perf_evlist__add_attrs(struct perf_evlist *evlist, |
143 | struct perf_event_attr *attrs, size_t nr_attrs) | |
50d08e47 ACM |
144 | { |
145 | struct perf_evsel *evsel, *n; | |
146 | LIST_HEAD(head); | |
147 | size_t i; | |
148 | ||
149 | for (i = 0; i < nr_attrs; i++) { | |
150 | evsel = perf_evsel__new(attrs + i, evlist->nr_entries + i); | |
151 | if (evsel == NULL) | |
152 | goto out_delete_partial_list; | |
153 | list_add_tail(&evsel->node, &head); | |
154 | } | |
155 | ||
156 | perf_evlist__splice_list_tail(evlist, &head, nr_attrs); | |
157 | ||
158 | return 0; | |
159 | ||
160 | out_delete_partial_list: | |
161 | list_for_each_entry_safe(evsel, n, &head, node) | |
162 | perf_evsel__delete(evsel); | |
163 | return -1; | |
164 | } | |
165 | ||
79695e1b ACM |
166 | int __perf_evlist__add_default_attrs(struct perf_evlist *evlist, |
167 | struct perf_event_attr *attrs, size_t nr_attrs) | |
168 | { | |
169 | size_t i; | |
170 | ||
171 | for (i = 0; i < nr_attrs; i++) | |
172 | event_attr_init(attrs + i); | |
173 | ||
174 | return perf_evlist__add_attrs(evlist, attrs, nr_attrs); | |
175 | } | |
176 | ||
da378962 ACM |
177 | struct perf_evsel * |
178 | perf_evlist__find_tracepoint_by_id(struct perf_evlist *evlist, int id) | |
ee29be62 ACM |
179 | { |
180 | struct perf_evsel *evsel; | |
181 | ||
182 | list_for_each_entry(evsel, &evlist->entries, node) { | |
183 | if (evsel->attr.type == PERF_TYPE_TRACEPOINT && | |
184 | (int)evsel->attr.config == id) | |
185 | return evsel; | |
186 | } | |
187 | ||
188 | return NULL; | |
189 | } | |
190 | ||
39876e7d ACM |
191 | int perf_evlist__add_newtp(struct perf_evlist *evlist, |
192 | const char *sys, const char *name, void *handler) | |
193 | { | |
194 | struct perf_evsel *evsel; | |
195 | ||
196 | evsel = perf_evsel__newtp(sys, name, evlist->nr_entries); | |
197 | if (evsel == NULL) | |
198 | return -1; | |
199 | ||
200 | evsel->handler.func = handler; | |
201 | perf_evlist__add(evlist, evsel); | |
202 | return 0; | |
203 | } | |
204 | ||
4152ab37 ACM |
205 | void perf_evlist__disable(struct perf_evlist *evlist) |
206 | { | |
207 | int cpu, thread; | |
208 | struct perf_evsel *pos; | |
b3a319d5 NK |
209 | int nr_cpus = cpu_map__nr(evlist->cpus); |
210 | int nr_threads = thread_map__nr(evlist->threads); | |
4152ab37 | 211 | |
b3a319d5 | 212 | for (cpu = 0; cpu < nr_cpus; cpu++) { |
4152ab37 | 213 | list_for_each_entry(pos, &evlist->entries, node) { |
823254ed | 214 | if (!perf_evsel__is_group_leader(pos)) |
3fe4430d | 215 | continue; |
b3a319d5 | 216 | for (thread = 0; thread < nr_threads; thread++) |
55da8005 NK |
217 | ioctl(FD(pos, cpu, thread), |
218 | PERF_EVENT_IOC_DISABLE, 0); | |
4152ab37 ACM |
219 | } |
220 | } | |
221 | } | |
222 | ||
764e16a3 DA |
223 | void perf_evlist__enable(struct perf_evlist *evlist) |
224 | { | |
225 | int cpu, thread; | |
226 | struct perf_evsel *pos; | |
b3a319d5 NK |
227 | int nr_cpus = cpu_map__nr(evlist->cpus); |
228 | int nr_threads = thread_map__nr(evlist->threads); | |
764e16a3 | 229 | |
b3a319d5 | 230 | for (cpu = 0; cpu < nr_cpus; cpu++) { |
764e16a3 | 231 | list_for_each_entry(pos, &evlist->entries, node) { |
823254ed | 232 | if (!perf_evsel__is_group_leader(pos)) |
3fe4430d | 233 | continue; |
b3a319d5 | 234 | for (thread = 0; thread < nr_threads; thread++) |
55da8005 NK |
235 | ioctl(FD(pos, cpu, thread), |
236 | PERF_EVENT_IOC_ENABLE, 0); | |
764e16a3 DA |
237 | } |
238 | } | |
239 | } | |
240 | ||
806fb630 | 241 | static int perf_evlist__alloc_pollfd(struct perf_evlist *evlist) |
5c581041 | 242 | { |
b3a319d5 NK |
243 | int nr_cpus = cpu_map__nr(evlist->cpus); |
244 | int nr_threads = thread_map__nr(evlist->threads); | |
245 | int nfds = nr_cpus * nr_threads * evlist->nr_entries; | |
5c581041 ACM |
246 | evlist->pollfd = malloc(sizeof(struct pollfd) * nfds); |
247 | return evlist->pollfd != NULL ? 0 : -ENOMEM; | |
248 | } | |
70082dd9 ACM |
249 | |
250 | void perf_evlist__add_pollfd(struct perf_evlist *evlist, int fd) | |
251 | { | |
252 | fcntl(fd, F_SETFL, O_NONBLOCK); | |
253 | evlist->pollfd[evlist->nr_fds].fd = fd; | |
254 | evlist->pollfd[evlist->nr_fds].events = POLLIN; | |
255 | evlist->nr_fds++; | |
256 | } | |
70db7533 | 257 | |
a91e5431 ACM |
258 | static void perf_evlist__id_hash(struct perf_evlist *evlist, |
259 | struct perf_evsel *evsel, | |
260 | int cpu, int thread, u64 id) | |
3d3b5e95 ACM |
261 | { |
262 | int hash; | |
263 | struct perf_sample_id *sid = SID(evsel, cpu, thread); | |
264 | ||
265 | sid->id = id; | |
266 | sid->evsel = evsel; | |
267 | hash = hash_64(sid->id, PERF_EVLIST__HLIST_BITS); | |
268 | hlist_add_head(&sid->node, &evlist->heads[hash]); | |
269 | } | |
270 | ||
a91e5431 ACM |
271 | void perf_evlist__id_add(struct perf_evlist *evlist, struct perf_evsel *evsel, |
272 | int cpu, int thread, u64 id) | |
273 | { | |
274 | perf_evlist__id_hash(evlist, evsel, cpu, thread, id); | |
275 | evsel->id[evsel->ids++] = id; | |
276 | } | |
277 | ||
278 | static int perf_evlist__id_add_fd(struct perf_evlist *evlist, | |
279 | struct perf_evsel *evsel, | |
280 | int cpu, int thread, int fd) | |
f8a95309 | 281 | { |
f8a95309 | 282 | u64 read_data[4] = { 0, }; |
3d3b5e95 | 283 | int id_idx = 1; /* The first entry is the counter value */ |
e2b5abe0 JO |
284 | u64 id; |
285 | int ret; | |
286 | ||
287 | ret = ioctl(fd, PERF_EVENT_IOC_ID, &id); | |
288 | if (!ret) | |
289 | goto add; | |
290 | ||
291 | if (errno != ENOTTY) | |
292 | return -1; | |
293 | ||
294 | /* Legacy way to get event id.. All hail to old kernels! */ | |
f8a95309 | 295 | |
c4861afe JO |
296 | /* |
297 | * This way does not work with group format read, so bail | |
298 | * out in that case. | |
299 | */ | |
300 | if (perf_evlist__read_format(evlist) & PERF_FORMAT_GROUP) | |
301 | return -1; | |
302 | ||
f8a95309 ACM |
303 | if (!(evsel->attr.read_format & PERF_FORMAT_ID) || |
304 | read(fd, &read_data, sizeof(read_data)) == -1) | |
305 | return -1; | |
306 | ||
307 | if (evsel->attr.read_format & PERF_FORMAT_TOTAL_TIME_ENABLED) | |
308 | ++id_idx; | |
309 | if (evsel->attr.read_format & PERF_FORMAT_TOTAL_TIME_RUNNING) | |
310 | ++id_idx; | |
311 | ||
e2b5abe0 JO |
312 | id = read_data[id_idx]; |
313 | ||
314 | add: | |
315 | perf_evlist__id_add(evlist, evsel, cpu, thread, id); | |
f8a95309 ACM |
316 | return 0; |
317 | } | |
318 | ||
932a3594 | 319 | struct perf_sample_id *perf_evlist__id2sid(struct perf_evlist *evlist, u64 id) |
70db7533 ACM |
320 | { |
321 | struct hlist_head *head; | |
70db7533 ACM |
322 | struct perf_sample_id *sid; |
323 | int hash; | |
324 | ||
70db7533 ACM |
325 | hash = hash_64(id, PERF_EVLIST__HLIST_BITS); |
326 | head = &evlist->heads[hash]; | |
327 | ||
b67bfe0d | 328 | hlist_for_each_entry(sid, head, node) |
70db7533 | 329 | if (sid->id == id) |
932a3594 JO |
330 | return sid; |
331 | ||
332 | return NULL; | |
333 | } | |
334 | ||
335 | struct perf_evsel *perf_evlist__id2evsel(struct perf_evlist *evlist, u64 id) | |
336 | { | |
337 | struct perf_sample_id *sid; | |
338 | ||
339 | if (evlist->nr_entries == 1) | |
340 | return perf_evlist__first(evlist); | |
341 | ||
342 | sid = perf_evlist__id2sid(evlist, id); | |
343 | if (sid) | |
344 | return sid->evsel; | |
30e68bcc NK |
345 | |
346 | if (!perf_evlist__sample_id_all(evlist)) | |
0c21f736 | 347 | return perf_evlist__first(evlist); |
30e68bcc | 348 | |
70db7533 ACM |
349 | return NULL; |
350 | } | |
04391deb | 351 | |
aece948f | 352 | union perf_event *perf_evlist__mmap_read(struct perf_evlist *evlist, int idx) |
04391deb | 353 | { |
aece948f | 354 | struct perf_mmap *md = &evlist->mmap[idx]; |
04391deb ACM |
355 | unsigned int head = perf_mmap__read_head(md); |
356 | unsigned int old = md->prev; | |
357 | unsigned char *data = md->base + page_size; | |
8115d60c | 358 | union perf_event *event = NULL; |
04391deb | 359 | |
7bb41152 | 360 | if (evlist->overwrite) { |
04391deb | 361 | /* |
7bb41152 ACM |
362 | * If we're further behind than half the buffer, there's a chance |
363 | * the writer will bite our tail and mess up the samples under us. | |
364 | * | |
365 | * If we somehow ended up ahead of the head, we got messed up. | |
366 | * | |
367 | * In either case, truncate and restart at head. | |
04391deb | 368 | */ |
7bb41152 ACM |
369 | int diff = head - old; |
370 | if (diff > md->mask / 2 || diff < 0) { | |
371 | fprintf(stderr, "WARNING: failed to keep up with mmap data.\n"); | |
372 | ||
373 | /* | |
374 | * head points to a known good entry, start there. | |
375 | */ | |
376 | old = head; | |
377 | } | |
04391deb ACM |
378 | } |
379 | ||
380 | if (old != head) { | |
381 | size_t size; | |
382 | ||
8115d60c | 383 | event = (union perf_event *)&data[old & md->mask]; |
04391deb ACM |
384 | size = event->header.size; |
385 | ||
386 | /* | |
387 | * Event straddles the mmap boundary -- header should always | |
388 | * be inside due to u64 alignment of output. | |
389 | */ | |
390 | if ((old & md->mask) + size != ((old + size) & md->mask)) { | |
391 | unsigned int offset = old; | |
392 | unsigned int len = min(sizeof(*event), size), cpy; | |
0479b8b9 | 393 | void *dst = &md->event_copy; |
04391deb ACM |
394 | |
395 | do { | |
396 | cpy = min(md->mask + 1 - (offset & md->mask), len); | |
397 | memcpy(dst, &data[offset & md->mask], cpy); | |
398 | offset += cpy; | |
399 | dst += cpy; | |
400 | len -= cpy; | |
401 | } while (len); | |
402 | ||
0479b8b9 | 403 | event = &md->event_copy; |
04391deb ACM |
404 | } |
405 | ||
406 | old += size; | |
407 | } | |
408 | ||
409 | md->prev = old; | |
7bb41152 ACM |
410 | |
411 | if (!evlist->overwrite) | |
412 | perf_mmap__write_tail(md, old); | |
413 | ||
04391deb ACM |
414 | return event; |
415 | } | |
f8a95309 | 416 | |
93edcbd9 AH |
417 | static void __perf_evlist__munmap(struct perf_evlist *evlist, int idx) |
418 | { | |
419 | if (evlist->mmap[idx].base != NULL) { | |
420 | munmap(evlist->mmap[idx].base, evlist->mmap_len); | |
421 | evlist->mmap[idx].base = NULL; | |
422 | } | |
423 | } | |
424 | ||
7e2ed097 | 425 | void perf_evlist__munmap(struct perf_evlist *evlist) |
f8a95309 | 426 | { |
aece948f | 427 | int i; |
f8a95309 | 428 | |
93edcbd9 AH |
429 | for (i = 0; i < evlist->nr_mmaps; i++) |
430 | __perf_evlist__munmap(evlist, i); | |
aece948f ACM |
431 | |
432 | free(evlist->mmap); | |
433 | evlist->mmap = NULL; | |
f8a95309 ACM |
434 | } |
435 | ||
806fb630 | 436 | static int perf_evlist__alloc_mmap(struct perf_evlist *evlist) |
f8a95309 | 437 | { |
a14bb7a6 | 438 | evlist->nr_mmaps = cpu_map__nr(evlist->cpus); |
ec1e7e43 | 439 | if (cpu_map__empty(evlist->cpus)) |
b3a319d5 | 440 | evlist->nr_mmaps = thread_map__nr(evlist->threads); |
aece948f | 441 | evlist->mmap = zalloc(evlist->nr_mmaps * sizeof(struct perf_mmap)); |
f8a95309 ACM |
442 | return evlist->mmap != NULL ? 0 : -ENOMEM; |
443 | } | |
444 | ||
bccdaba0 | 445 | static int __perf_evlist__mmap(struct perf_evlist *evlist, |
aece948f | 446 | int idx, int prot, int mask, int fd) |
f8a95309 | 447 | { |
aece948f ACM |
448 | evlist->mmap[idx].prev = 0; |
449 | evlist->mmap[idx].mask = mask; | |
450 | evlist->mmap[idx].base = mmap(NULL, evlist->mmap_len, prot, | |
f8a95309 | 451 | MAP_SHARED, fd, 0); |
301b195d NE |
452 | if (evlist->mmap[idx].base == MAP_FAILED) { |
453 | evlist->mmap[idx].base = NULL; | |
f8a95309 | 454 | return -1; |
301b195d | 455 | } |
f8a95309 ACM |
456 | |
457 | perf_evlist__add_pollfd(evlist, fd); | |
458 | return 0; | |
459 | } | |
460 | ||
aece948f ACM |
461 | static int perf_evlist__mmap_per_cpu(struct perf_evlist *evlist, int prot, int mask) |
462 | { | |
463 | struct perf_evsel *evsel; | |
464 | int cpu, thread; | |
b3a319d5 NK |
465 | int nr_cpus = cpu_map__nr(evlist->cpus); |
466 | int nr_threads = thread_map__nr(evlist->threads); | |
aece948f | 467 | |
e3e1a54f | 468 | pr_debug2("perf event ring buffer mmapped per cpu\n"); |
b3a319d5 | 469 | for (cpu = 0; cpu < nr_cpus; cpu++) { |
aece948f ACM |
470 | int output = -1; |
471 | ||
b3a319d5 | 472 | for (thread = 0; thread < nr_threads; thread++) { |
aece948f ACM |
473 | list_for_each_entry(evsel, &evlist->entries, node) { |
474 | int fd = FD(evsel, cpu, thread); | |
475 | ||
476 | if (output == -1) { | |
477 | output = fd; | |
bccdaba0 | 478 | if (__perf_evlist__mmap(evlist, cpu, |
aece948f ACM |
479 | prot, mask, output) < 0) |
480 | goto out_unmap; | |
481 | } else { | |
482 | if (ioctl(fd, PERF_EVENT_IOC_SET_OUTPUT, output) != 0) | |
483 | goto out_unmap; | |
484 | } | |
485 | ||
486 | if ((evsel->attr.read_format & PERF_FORMAT_ID) && | |
487 | perf_evlist__id_add_fd(evlist, evsel, cpu, thread, fd) < 0) | |
488 | goto out_unmap; | |
489 | } | |
490 | } | |
491 | } | |
492 | ||
493 | return 0; | |
494 | ||
495 | out_unmap: | |
93edcbd9 AH |
496 | for (cpu = 0; cpu < nr_cpus; cpu++) |
497 | __perf_evlist__munmap(evlist, cpu); | |
aece948f ACM |
498 | return -1; |
499 | } | |
500 | ||
501 | static int perf_evlist__mmap_per_thread(struct perf_evlist *evlist, int prot, int mask) | |
502 | { | |
503 | struct perf_evsel *evsel; | |
504 | int thread; | |
b3a319d5 | 505 | int nr_threads = thread_map__nr(evlist->threads); |
aece948f | 506 | |
e3e1a54f | 507 | pr_debug2("perf event ring buffer mmapped per thread\n"); |
b3a319d5 | 508 | for (thread = 0; thread < nr_threads; thread++) { |
aece948f ACM |
509 | int output = -1; |
510 | ||
511 | list_for_each_entry(evsel, &evlist->entries, node) { | |
512 | int fd = FD(evsel, 0, thread); | |
513 | ||
514 | if (output == -1) { | |
515 | output = fd; | |
bccdaba0 | 516 | if (__perf_evlist__mmap(evlist, thread, |
aece948f ACM |
517 | prot, mask, output) < 0) |
518 | goto out_unmap; | |
519 | } else { | |
520 | if (ioctl(fd, PERF_EVENT_IOC_SET_OUTPUT, output) != 0) | |
521 | goto out_unmap; | |
522 | } | |
523 | ||
524 | if ((evsel->attr.read_format & PERF_FORMAT_ID) && | |
525 | perf_evlist__id_add_fd(evlist, evsel, 0, thread, fd) < 0) | |
526 | goto out_unmap; | |
527 | } | |
528 | } | |
529 | ||
530 | return 0; | |
531 | ||
532 | out_unmap: | |
93edcbd9 AH |
533 | for (thread = 0; thread < nr_threads; thread++) |
534 | __perf_evlist__munmap(evlist, thread); | |
aece948f ACM |
535 | return -1; |
536 | } | |
537 | ||
f8a95309 ACM |
538 | /** perf_evlist__mmap - Create per cpu maps to receive events |
539 | * | |
540 | * @evlist - list of events | |
f8a95309 ACM |
541 | * @pages - map length in pages |
542 | * @overwrite - overwrite older events? | |
543 | * | |
544 | * If overwrite is false the user needs to signal event consuption using: | |
545 | * | |
546 | * struct perf_mmap *m = &evlist->mmap[cpu]; | |
547 | * unsigned int head = perf_mmap__read_head(m); | |
548 | * | |
549 | * perf_mmap__write_tail(m, head) | |
7e2ed097 ACM |
550 | * |
551 | * Using perf_evlist__read_on_cpu does this automatically. | |
f8a95309 | 552 | */ |
50a682ce ACM |
553 | int perf_evlist__mmap(struct perf_evlist *evlist, unsigned int pages, |
554 | bool overwrite) | |
f8a95309 | 555 | { |
aece948f | 556 | struct perf_evsel *evsel; |
7e2ed097 ACM |
557 | const struct cpu_map *cpus = evlist->cpus; |
558 | const struct thread_map *threads = evlist->threads; | |
50a682ce ACM |
559 | int prot = PROT_READ | (overwrite ? 0 : PROT_WRITE), mask; |
560 | ||
561 | /* 512 kiB: default amount of unprivileged mlocked memory */ | |
562 | if (pages == UINT_MAX) | |
563 | pages = (512 * 1024) / page_size; | |
41d0d933 NE |
564 | else if (!is_power_of_2(pages)) |
565 | return -EINVAL; | |
50a682ce ACM |
566 | |
567 | mask = pages * page_size - 1; | |
f8a95309 | 568 | |
7e2ed097 | 569 | if (evlist->mmap == NULL && perf_evlist__alloc_mmap(evlist) < 0) |
f8a95309 ACM |
570 | return -ENOMEM; |
571 | ||
7e2ed097 | 572 | if (evlist->pollfd == NULL && perf_evlist__alloc_pollfd(evlist) < 0) |
f8a95309 ACM |
573 | return -ENOMEM; |
574 | ||
575 | evlist->overwrite = overwrite; | |
576 | evlist->mmap_len = (pages + 1) * page_size; | |
f8a95309 ACM |
577 | |
578 | list_for_each_entry(evsel, &evlist->entries, node) { | |
579 | if ((evsel->attr.read_format & PERF_FORMAT_ID) && | |
a91e5431 | 580 | evsel->sample_id == NULL && |
a14bb7a6 | 581 | perf_evsel__alloc_id(evsel, cpu_map__nr(cpus), threads->nr) < 0) |
f8a95309 | 582 | return -ENOMEM; |
f8a95309 ACM |
583 | } |
584 | ||
ec1e7e43 | 585 | if (cpu_map__empty(cpus)) |
aece948f | 586 | return perf_evlist__mmap_per_thread(evlist, prot, mask); |
f8a95309 | 587 | |
aece948f | 588 | return perf_evlist__mmap_per_cpu(evlist, prot, mask); |
f8a95309 | 589 | } |
7e2ed097 | 590 | |
b809ac10 NK |
591 | int perf_evlist__create_maps(struct perf_evlist *evlist, |
592 | struct perf_target *target) | |
7e2ed097 | 593 | { |
b809ac10 NK |
594 | evlist->threads = thread_map__new_str(target->pid, target->tid, |
595 | target->uid); | |
7e2ed097 ACM |
596 | |
597 | if (evlist->threads == NULL) | |
598 | return -1; | |
599 | ||
879d77d0 | 600 | if (perf_target__has_task(target)) |
d67356e7 | 601 | evlist->cpus = cpu_map__dummy_new(); |
d1cb9fce NK |
602 | else if (!perf_target__has_cpu(target) && !target->uses_mmap) |
603 | evlist->cpus = cpu_map__dummy_new(); | |
879d77d0 NK |
604 | else |
605 | evlist->cpus = cpu_map__new(target->cpu_list); | |
7e2ed097 ACM |
606 | |
607 | if (evlist->cpus == NULL) | |
608 | goto out_delete_threads; | |
609 | ||
610 | return 0; | |
611 | ||
612 | out_delete_threads: | |
613 | thread_map__delete(evlist->threads); | |
614 | return -1; | |
615 | } | |
616 | ||
617 | void perf_evlist__delete_maps(struct perf_evlist *evlist) | |
618 | { | |
619 | cpu_map__delete(evlist->cpus); | |
620 | thread_map__delete(evlist->threads); | |
621 | evlist->cpus = NULL; | |
622 | evlist->threads = NULL; | |
623 | } | |
0a102479 | 624 | |
1491a632 | 625 | int perf_evlist__apply_filters(struct perf_evlist *evlist) |
0a102479 | 626 | { |
0a102479 | 627 | struct perf_evsel *evsel; |
745cefc5 ACM |
628 | int err = 0; |
629 | const int ncpus = cpu_map__nr(evlist->cpus), | |
b3a319d5 | 630 | nthreads = thread_map__nr(evlist->threads); |
0a102479 FW |
631 | |
632 | list_for_each_entry(evsel, &evlist->entries, node) { | |
745cefc5 | 633 | if (evsel->filter == NULL) |
0a102479 | 634 | continue; |
745cefc5 ACM |
635 | |
636 | err = perf_evsel__set_filter(evsel, ncpus, nthreads, evsel->filter); | |
637 | if (err) | |
638 | break; | |
0a102479 FW |
639 | } |
640 | ||
745cefc5 ACM |
641 | return err; |
642 | } | |
643 | ||
644 | int perf_evlist__set_filter(struct perf_evlist *evlist, const char *filter) | |
645 | { | |
646 | struct perf_evsel *evsel; | |
647 | int err = 0; | |
648 | const int ncpus = cpu_map__nr(evlist->cpus), | |
b3a319d5 | 649 | nthreads = thread_map__nr(evlist->threads); |
745cefc5 ACM |
650 | |
651 | list_for_each_entry(evsel, &evlist->entries, node) { | |
652 | err = perf_evsel__set_filter(evsel, ncpus, nthreads, filter); | |
653 | if (err) | |
654 | break; | |
655 | } | |
656 | ||
657 | return err; | |
0a102479 | 658 | } |
74429964 | 659 | |
0c21f736 | 660 | bool perf_evlist__valid_sample_type(struct perf_evlist *evlist) |
74429964 | 661 | { |
0c21f736 | 662 | struct perf_evsel *first = perf_evlist__first(evlist), *pos = first; |
c2a70653 ACM |
663 | |
664 | list_for_each_entry_continue(pos, &evlist->entries, node) { | |
665 | if (first->attr.sample_type != pos->attr.sample_type) | |
666 | return false; | |
74429964 FW |
667 | } |
668 | ||
c2a70653 | 669 | return true; |
74429964 FW |
670 | } |
671 | ||
0c21f736 | 672 | u64 perf_evlist__sample_type(struct perf_evlist *evlist) |
c2a70653 | 673 | { |
0c21f736 | 674 | struct perf_evsel *first = perf_evlist__first(evlist); |
c2a70653 ACM |
675 | return first->attr.sample_type; |
676 | } | |
677 | ||
9ede473c JO |
678 | bool perf_evlist__valid_read_format(struct perf_evlist *evlist) |
679 | { | |
680 | struct perf_evsel *first = perf_evlist__first(evlist), *pos = first; | |
681 | u64 read_format = first->attr.read_format; | |
682 | u64 sample_type = first->attr.sample_type; | |
683 | ||
684 | list_for_each_entry_continue(pos, &evlist->entries, node) { | |
685 | if (read_format != pos->attr.read_format) | |
686 | return false; | |
687 | } | |
688 | ||
689 | /* PERF_SAMPLE_READ imples PERF_FORMAT_ID. */ | |
690 | if ((sample_type & PERF_SAMPLE_READ) && | |
691 | !(read_format & PERF_FORMAT_ID)) { | |
692 | return false; | |
693 | } | |
694 | ||
695 | return true; | |
696 | } | |
697 | ||
698 | u64 perf_evlist__read_format(struct perf_evlist *evlist) | |
699 | { | |
700 | struct perf_evsel *first = perf_evlist__first(evlist); | |
701 | return first->attr.read_format; | |
702 | } | |
703 | ||
0c21f736 | 704 | u16 perf_evlist__id_hdr_size(struct perf_evlist *evlist) |
81e36bff | 705 | { |
0c21f736 | 706 | struct perf_evsel *first = perf_evlist__first(evlist); |
81e36bff ACM |
707 | struct perf_sample *data; |
708 | u64 sample_type; | |
709 | u16 size = 0; | |
710 | ||
81e36bff ACM |
711 | if (!first->attr.sample_id_all) |
712 | goto out; | |
713 | ||
714 | sample_type = first->attr.sample_type; | |
715 | ||
716 | if (sample_type & PERF_SAMPLE_TID) | |
717 | size += sizeof(data->tid) * 2; | |
718 | ||
719 | if (sample_type & PERF_SAMPLE_TIME) | |
720 | size += sizeof(data->time); | |
721 | ||
722 | if (sample_type & PERF_SAMPLE_ID) | |
723 | size += sizeof(data->id); | |
724 | ||
725 | if (sample_type & PERF_SAMPLE_STREAM_ID) | |
726 | size += sizeof(data->stream_id); | |
727 | ||
728 | if (sample_type & PERF_SAMPLE_CPU) | |
729 | size += sizeof(data->cpu) * 2; | |
730 | out: | |
731 | return size; | |
732 | } | |
733 | ||
0c21f736 | 734 | bool perf_evlist__valid_sample_id_all(struct perf_evlist *evlist) |
74429964 | 735 | { |
0c21f736 | 736 | struct perf_evsel *first = perf_evlist__first(evlist), *pos = first; |
c2a70653 ACM |
737 | |
738 | list_for_each_entry_continue(pos, &evlist->entries, node) { | |
739 | if (first->attr.sample_id_all != pos->attr.sample_id_all) | |
740 | return false; | |
74429964 FW |
741 | } |
742 | ||
c2a70653 ACM |
743 | return true; |
744 | } | |
745 | ||
0c21f736 | 746 | bool perf_evlist__sample_id_all(struct perf_evlist *evlist) |
c2a70653 | 747 | { |
0c21f736 | 748 | struct perf_evsel *first = perf_evlist__first(evlist); |
c2a70653 | 749 | return first->attr.sample_id_all; |
74429964 | 750 | } |
81cce8de ACM |
751 | |
752 | void perf_evlist__set_selected(struct perf_evlist *evlist, | |
753 | struct perf_evsel *evsel) | |
754 | { | |
755 | evlist->selected = evsel; | |
756 | } | |
727ab04e | 757 | |
a74b4b66 NK |
758 | void perf_evlist__close(struct perf_evlist *evlist) |
759 | { | |
760 | struct perf_evsel *evsel; | |
761 | int ncpus = cpu_map__nr(evlist->cpus); | |
762 | int nthreads = thread_map__nr(evlist->threads); | |
763 | ||
764 | list_for_each_entry_reverse(evsel, &evlist->entries, node) | |
765 | perf_evsel__close(evsel, ncpus, nthreads); | |
766 | } | |
767 | ||
6a4bb04c | 768 | int perf_evlist__open(struct perf_evlist *evlist) |
727ab04e | 769 | { |
6a4bb04c | 770 | struct perf_evsel *evsel; |
a74b4b66 | 771 | int err; |
727ab04e | 772 | |
727ab04e | 773 | list_for_each_entry(evsel, &evlist->entries, node) { |
6a4bb04c | 774 | err = perf_evsel__open(evsel, evlist->cpus, evlist->threads); |
727ab04e ACM |
775 | if (err < 0) |
776 | goto out_err; | |
777 | } | |
778 | ||
779 | return 0; | |
780 | out_err: | |
a74b4b66 | 781 | perf_evlist__close(evlist); |
41c21a68 | 782 | errno = -err; |
727ab04e ACM |
783 | return err; |
784 | } | |
35b9d88e ACM |
785 | |
786 | int perf_evlist__prepare_workload(struct perf_evlist *evlist, | |
6ef73ec4 | 787 | struct perf_target *target, |
55e162ea NK |
788 | const char *argv[], bool pipe_output, |
789 | bool want_signal) | |
35b9d88e ACM |
790 | { |
791 | int child_ready_pipe[2], go_pipe[2]; | |
792 | char bf; | |
793 | ||
794 | if (pipe(child_ready_pipe) < 0) { | |
795 | perror("failed to create 'ready' pipe"); | |
796 | return -1; | |
797 | } | |
798 | ||
799 | if (pipe(go_pipe) < 0) { | |
800 | perror("failed to create 'go' pipe"); | |
801 | goto out_close_ready_pipe; | |
802 | } | |
803 | ||
804 | evlist->workload.pid = fork(); | |
805 | if (evlist->workload.pid < 0) { | |
806 | perror("failed to fork"); | |
807 | goto out_close_pipes; | |
808 | } | |
809 | ||
810 | if (!evlist->workload.pid) { | |
119fa3c9 | 811 | if (pipe_output) |
35b9d88e ACM |
812 | dup2(2, 1); |
813 | ||
0817df08 DA |
814 | signal(SIGTERM, SIG_DFL); |
815 | ||
35b9d88e ACM |
816 | close(child_ready_pipe[0]); |
817 | close(go_pipe[1]); | |
818 | fcntl(go_pipe[0], F_SETFD, FD_CLOEXEC); | |
819 | ||
35b9d88e ACM |
820 | /* |
821 | * Tell the parent we're ready to go | |
822 | */ | |
823 | close(child_ready_pipe[1]); | |
824 | ||
825 | /* | |
826 | * Wait until the parent tells us to go. | |
827 | */ | |
828 | if (read(go_pipe[0], &bf, 1) == -1) | |
829 | perror("unable to read pipe"); | |
830 | ||
831 | execvp(argv[0], (char **)argv); | |
832 | ||
833 | perror(argv[0]); | |
55e162ea NK |
834 | if (want_signal) |
835 | kill(getppid(), SIGUSR1); | |
35b9d88e ACM |
836 | exit(-1); |
837 | } | |
838 | ||
6ef73ec4 | 839 | if (perf_target__none(target)) |
35b9d88e ACM |
840 | evlist->threads->map[0] = evlist->workload.pid; |
841 | ||
842 | close(child_ready_pipe[1]); | |
843 | close(go_pipe[0]); | |
844 | /* | |
845 | * wait for child to settle | |
846 | */ | |
847 | if (read(child_ready_pipe[0], &bf, 1) == -1) { | |
848 | perror("unable to read pipe"); | |
849 | goto out_close_pipes; | |
850 | } | |
851 | ||
bcf3145f | 852 | fcntl(go_pipe[1], F_SETFD, FD_CLOEXEC); |
35b9d88e ACM |
853 | evlist->workload.cork_fd = go_pipe[1]; |
854 | close(child_ready_pipe[0]); | |
855 | return 0; | |
856 | ||
857 | out_close_pipes: | |
858 | close(go_pipe[0]); | |
859 | close(go_pipe[1]); | |
860 | out_close_ready_pipe: | |
861 | close(child_ready_pipe[0]); | |
862 | close(child_ready_pipe[1]); | |
863 | return -1; | |
864 | } | |
865 | ||
866 | int perf_evlist__start_workload(struct perf_evlist *evlist) | |
867 | { | |
868 | if (evlist->workload.cork_fd > 0) { | |
b3824404 | 869 | char bf = 0; |
bcf3145f | 870 | int ret; |
35b9d88e ACM |
871 | /* |
872 | * Remove the cork, let it rip! | |
873 | */ | |
bcf3145f NK |
874 | ret = write(evlist->workload.cork_fd, &bf, 1); |
875 | if (ret < 0) | |
876 | perror("enable to write to pipe"); | |
877 | ||
878 | close(evlist->workload.cork_fd); | |
879 | return ret; | |
35b9d88e ACM |
880 | } |
881 | ||
882 | return 0; | |
883 | } | |
cb0b29e0 | 884 | |
a3f698fe | 885 | int perf_evlist__parse_sample(struct perf_evlist *evlist, union perf_event *event, |
0807d2d8 | 886 | struct perf_sample *sample) |
cb0b29e0 | 887 | { |
0c21f736 | 888 | struct perf_evsel *evsel = perf_evlist__first(evlist); |
0807d2d8 | 889 | return perf_evsel__parse_sample(evsel, event, sample); |
cb0b29e0 | 890 | } |
78f067b3 ACM |
891 | |
892 | size_t perf_evlist__fprintf(struct perf_evlist *evlist, FILE *fp) | |
893 | { | |
894 | struct perf_evsel *evsel; | |
895 | size_t printed = 0; | |
896 | ||
897 | list_for_each_entry(evsel, &evlist->entries, node) { | |
898 | printed += fprintf(fp, "%s%s", evsel->idx ? ", " : "", | |
899 | perf_evsel__name(evsel)); | |
900 | } | |
901 | ||
902 | return printed + fprintf(fp, "\n");; | |
903 | } |