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" | |
35b9d88e | 17 | #include <unistd.h> |
361c99a6 | 18 | |
50d08e47 ACM |
19 | #include "parse-events.h" |
20 | ||
f8a95309 ACM |
21 | #include <sys/mman.h> |
22 | ||
70db7533 ACM |
23 | #include <linux/bitops.h> |
24 | #include <linux/hash.h> | |
25 | ||
f8a95309 | 26 | #define FD(e, x, y) (*(int *)xyarray__entry(e->fd, x, y)) |
a91e5431 | 27 | #define SID(e, x, y) xyarray__entry(e->sample_id, x, y) |
f8a95309 | 28 | |
7e2ed097 ACM |
29 | void perf_evlist__init(struct perf_evlist *evlist, struct cpu_map *cpus, |
30 | struct thread_map *threads) | |
ef1d1af2 ACM |
31 | { |
32 | int i; | |
33 | ||
34 | for (i = 0; i < PERF_EVLIST__HLIST_SIZE; ++i) | |
35 | INIT_HLIST_HEAD(&evlist->heads[i]); | |
36 | INIT_LIST_HEAD(&evlist->entries); | |
7e2ed097 | 37 | perf_evlist__set_maps(evlist, cpus, threads); |
35b9d88e | 38 | evlist->workload.pid = -1; |
ef1d1af2 ACM |
39 | } |
40 | ||
334fe7a3 | 41 | struct perf_evlist *perf_evlist__new(void) |
361c99a6 ACM |
42 | { |
43 | struct perf_evlist *evlist = zalloc(sizeof(*evlist)); | |
44 | ||
ef1d1af2 | 45 | if (evlist != NULL) |
334fe7a3 | 46 | perf_evlist__init(evlist, NULL, NULL); |
361c99a6 ACM |
47 | |
48 | return evlist; | |
49 | } | |
50 | ||
f77a9518 ACM |
51 | void perf_evlist__config(struct perf_evlist *evlist, |
52 | struct perf_record_opts *opts) | |
0f82ebc4 | 53 | { |
cac21425 | 54 | struct perf_evsel *evsel; |
f77a9518 ACM |
55 | /* |
56 | * Set the evsel leader links before we configure attributes, | |
57 | * since some might depend on this info. | |
58 | */ | |
59 | if (opts->group) | |
60 | perf_evlist__set_leader(evlist); | |
0f82ebc4 ACM |
61 | |
62 | if (evlist->cpus->map[0] < 0) | |
63 | opts->no_inherit = true; | |
64 | ||
65 | list_for_each_entry(evsel, &evlist->entries, node) { | |
cac21425 | 66 | perf_evsel__config(evsel, opts); |
0f82ebc4 ACM |
67 | |
68 | if (evlist->nr_entries > 1) | |
3a5afaec | 69 | perf_evsel__set_sample_id(evsel); |
0f82ebc4 ACM |
70 | } |
71 | } | |
72 | ||
361c99a6 ACM |
73 | static void perf_evlist__purge(struct perf_evlist *evlist) |
74 | { | |
75 | struct perf_evsel *pos, *n; | |
76 | ||
77 | list_for_each_entry_safe(pos, n, &evlist->entries, node) { | |
78 | list_del_init(&pos->node); | |
79 | perf_evsel__delete(pos); | |
80 | } | |
81 | ||
82 | evlist->nr_entries = 0; | |
83 | } | |
84 | ||
ef1d1af2 | 85 | void perf_evlist__exit(struct perf_evlist *evlist) |
361c99a6 | 86 | { |
70db7533 | 87 | free(evlist->mmap); |
5c581041 | 88 | free(evlist->pollfd); |
ef1d1af2 ACM |
89 | evlist->mmap = NULL; |
90 | evlist->pollfd = NULL; | |
91 | } | |
92 | ||
93 | void perf_evlist__delete(struct perf_evlist *evlist) | |
94 | { | |
95 | perf_evlist__purge(evlist); | |
96 | perf_evlist__exit(evlist); | |
361c99a6 ACM |
97 | free(evlist); |
98 | } | |
99 | ||
100 | void perf_evlist__add(struct perf_evlist *evlist, struct perf_evsel *entry) | |
101 | { | |
102 | list_add_tail(&entry->node, &evlist->entries); | |
103 | ++evlist->nr_entries; | |
104 | } | |
105 | ||
0529bc1f JO |
106 | void perf_evlist__splice_list_tail(struct perf_evlist *evlist, |
107 | struct list_head *list, | |
108 | int nr_entries) | |
50d08e47 ACM |
109 | { |
110 | list_splice_tail(list, &evlist->entries); | |
111 | evlist->nr_entries += nr_entries; | |
112 | } | |
113 | ||
63dab225 ACM |
114 | void __perf_evlist__set_leader(struct list_head *list) |
115 | { | |
116 | struct perf_evsel *evsel, *leader; | |
117 | ||
118 | leader = list_entry(list->next, struct perf_evsel, node); | |
97f63e4a NK |
119 | evsel = list_entry(list->prev, struct perf_evsel, node); |
120 | ||
121 | leader->nr_members = evsel->idx - leader->idx + 1; | |
63dab225 ACM |
122 | |
123 | list_for_each_entry(evsel, list, node) { | |
74b2133d | 124 | evsel->leader = leader; |
63dab225 ACM |
125 | } |
126 | } | |
127 | ||
128 | void perf_evlist__set_leader(struct perf_evlist *evlist) | |
6a4bb04c | 129 | { |
97f63e4a NK |
130 | if (evlist->nr_entries) { |
131 | evlist->nr_groups = evlist->nr_entries > 1 ? 1 : 0; | |
63dab225 | 132 | __perf_evlist__set_leader(&evlist->entries); |
97f63e4a | 133 | } |
6a4bb04c JO |
134 | } |
135 | ||
361c99a6 ACM |
136 | int perf_evlist__add_default(struct perf_evlist *evlist) |
137 | { | |
138 | struct perf_event_attr attr = { | |
139 | .type = PERF_TYPE_HARDWARE, | |
140 | .config = PERF_COUNT_HW_CPU_CYCLES, | |
141 | }; | |
1aed2671 JR |
142 | struct perf_evsel *evsel; |
143 | ||
144 | event_attr_init(&attr); | |
361c99a6 | 145 | |
1aed2671 | 146 | evsel = perf_evsel__new(&attr, 0); |
361c99a6 | 147 | if (evsel == NULL) |
cc2d86b0 SE |
148 | goto error; |
149 | ||
150 | /* use strdup() because free(evsel) assumes name is allocated */ | |
151 | evsel->name = strdup("cycles"); | |
152 | if (!evsel->name) | |
153 | goto error_free; | |
361c99a6 ACM |
154 | |
155 | perf_evlist__add(evlist, evsel); | |
156 | return 0; | |
cc2d86b0 SE |
157 | error_free: |
158 | perf_evsel__delete(evsel); | |
159 | error: | |
160 | return -ENOMEM; | |
361c99a6 | 161 | } |
5c581041 | 162 | |
e60fc847 ACM |
163 | static int perf_evlist__add_attrs(struct perf_evlist *evlist, |
164 | struct perf_event_attr *attrs, size_t nr_attrs) | |
50d08e47 ACM |
165 | { |
166 | struct perf_evsel *evsel, *n; | |
167 | LIST_HEAD(head); | |
168 | size_t i; | |
169 | ||
170 | for (i = 0; i < nr_attrs; i++) { | |
171 | evsel = perf_evsel__new(attrs + i, evlist->nr_entries + i); | |
172 | if (evsel == NULL) | |
173 | goto out_delete_partial_list; | |
174 | list_add_tail(&evsel->node, &head); | |
175 | } | |
176 | ||
177 | perf_evlist__splice_list_tail(evlist, &head, nr_attrs); | |
178 | ||
179 | return 0; | |
180 | ||
181 | out_delete_partial_list: | |
182 | list_for_each_entry_safe(evsel, n, &head, node) | |
183 | perf_evsel__delete(evsel); | |
184 | return -1; | |
185 | } | |
186 | ||
79695e1b ACM |
187 | int __perf_evlist__add_default_attrs(struct perf_evlist *evlist, |
188 | struct perf_event_attr *attrs, size_t nr_attrs) | |
189 | { | |
190 | size_t i; | |
191 | ||
192 | for (i = 0; i < nr_attrs; i++) | |
193 | event_attr_init(attrs + i); | |
194 | ||
195 | return perf_evlist__add_attrs(evlist, attrs, nr_attrs); | |
196 | } | |
197 | ||
da378962 ACM |
198 | struct perf_evsel * |
199 | perf_evlist__find_tracepoint_by_id(struct perf_evlist *evlist, int id) | |
ee29be62 ACM |
200 | { |
201 | struct perf_evsel *evsel; | |
202 | ||
203 | list_for_each_entry(evsel, &evlist->entries, node) { | |
204 | if (evsel->attr.type == PERF_TYPE_TRACEPOINT && | |
205 | (int)evsel->attr.config == id) | |
206 | return evsel; | |
207 | } | |
208 | ||
209 | return NULL; | |
210 | } | |
211 | ||
39876e7d ACM |
212 | int perf_evlist__add_newtp(struct perf_evlist *evlist, |
213 | const char *sys, const char *name, void *handler) | |
214 | { | |
215 | struct perf_evsel *evsel; | |
216 | ||
217 | evsel = perf_evsel__newtp(sys, name, evlist->nr_entries); | |
218 | if (evsel == NULL) | |
219 | return -1; | |
220 | ||
221 | evsel->handler.func = handler; | |
222 | perf_evlist__add(evlist, evsel); | |
223 | return 0; | |
224 | } | |
225 | ||
4152ab37 ACM |
226 | void perf_evlist__disable(struct perf_evlist *evlist) |
227 | { | |
228 | int cpu, thread; | |
229 | struct perf_evsel *pos; | |
b3a319d5 NK |
230 | int nr_cpus = cpu_map__nr(evlist->cpus); |
231 | int nr_threads = thread_map__nr(evlist->threads); | |
4152ab37 | 232 | |
b3a319d5 | 233 | for (cpu = 0; cpu < nr_cpus; cpu++) { |
4152ab37 | 234 | list_for_each_entry(pos, &evlist->entries, node) { |
823254ed | 235 | if (!perf_evsel__is_group_leader(pos)) |
3fe4430d | 236 | continue; |
b3a319d5 | 237 | for (thread = 0; thread < nr_threads; thread++) |
55da8005 NK |
238 | ioctl(FD(pos, cpu, thread), |
239 | PERF_EVENT_IOC_DISABLE, 0); | |
4152ab37 ACM |
240 | } |
241 | } | |
242 | } | |
243 | ||
764e16a3 DA |
244 | void perf_evlist__enable(struct perf_evlist *evlist) |
245 | { | |
246 | int cpu, thread; | |
247 | struct perf_evsel *pos; | |
b3a319d5 NK |
248 | int nr_cpus = cpu_map__nr(evlist->cpus); |
249 | int nr_threads = thread_map__nr(evlist->threads); | |
764e16a3 | 250 | |
b3a319d5 | 251 | for (cpu = 0; cpu < nr_cpus; cpu++) { |
764e16a3 | 252 | list_for_each_entry(pos, &evlist->entries, node) { |
823254ed | 253 | if (!perf_evsel__is_group_leader(pos)) |
3fe4430d | 254 | continue; |
b3a319d5 | 255 | for (thread = 0; thread < nr_threads; thread++) |
55da8005 NK |
256 | ioctl(FD(pos, cpu, thread), |
257 | PERF_EVENT_IOC_ENABLE, 0); | |
764e16a3 DA |
258 | } |
259 | } | |
260 | } | |
261 | ||
806fb630 | 262 | static int perf_evlist__alloc_pollfd(struct perf_evlist *evlist) |
5c581041 | 263 | { |
b3a319d5 NK |
264 | int nr_cpus = cpu_map__nr(evlist->cpus); |
265 | int nr_threads = thread_map__nr(evlist->threads); | |
266 | int nfds = nr_cpus * nr_threads * evlist->nr_entries; | |
5c581041 ACM |
267 | evlist->pollfd = malloc(sizeof(struct pollfd) * nfds); |
268 | return evlist->pollfd != NULL ? 0 : -ENOMEM; | |
269 | } | |
70082dd9 ACM |
270 | |
271 | void perf_evlist__add_pollfd(struct perf_evlist *evlist, int fd) | |
272 | { | |
273 | fcntl(fd, F_SETFL, O_NONBLOCK); | |
274 | evlist->pollfd[evlist->nr_fds].fd = fd; | |
275 | evlist->pollfd[evlist->nr_fds].events = POLLIN; | |
276 | evlist->nr_fds++; | |
277 | } | |
70db7533 | 278 | |
a91e5431 ACM |
279 | static void perf_evlist__id_hash(struct perf_evlist *evlist, |
280 | struct perf_evsel *evsel, | |
281 | int cpu, int thread, u64 id) | |
3d3b5e95 ACM |
282 | { |
283 | int hash; | |
284 | struct perf_sample_id *sid = SID(evsel, cpu, thread); | |
285 | ||
286 | sid->id = id; | |
287 | sid->evsel = evsel; | |
288 | hash = hash_64(sid->id, PERF_EVLIST__HLIST_BITS); | |
289 | hlist_add_head(&sid->node, &evlist->heads[hash]); | |
290 | } | |
291 | ||
a91e5431 ACM |
292 | void perf_evlist__id_add(struct perf_evlist *evlist, struct perf_evsel *evsel, |
293 | int cpu, int thread, u64 id) | |
294 | { | |
295 | perf_evlist__id_hash(evlist, evsel, cpu, thread, id); | |
296 | evsel->id[evsel->ids++] = id; | |
297 | } | |
298 | ||
299 | static int perf_evlist__id_add_fd(struct perf_evlist *evlist, | |
300 | struct perf_evsel *evsel, | |
301 | int cpu, int thread, int fd) | |
f8a95309 | 302 | { |
f8a95309 | 303 | u64 read_data[4] = { 0, }; |
3d3b5e95 | 304 | int id_idx = 1; /* The first entry is the counter value */ |
e2b5abe0 JO |
305 | u64 id; |
306 | int ret; | |
307 | ||
308 | ret = ioctl(fd, PERF_EVENT_IOC_ID, &id); | |
309 | if (!ret) | |
310 | goto add; | |
311 | ||
312 | if (errno != ENOTTY) | |
313 | return -1; | |
314 | ||
315 | /* Legacy way to get event id.. All hail to old kernels! */ | |
f8a95309 | 316 | |
c4861afe JO |
317 | /* |
318 | * This way does not work with group format read, so bail | |
319 | * out in that case. | |
320 | */ | |
321 | if (perf_evlist__read_format(evlist) & PERF_FORMAT_GROUP) | |
322 | return -1; | |
323 | ||
f8a95309 ACM |
324 | if (!(evsel->attr.read_format & PERF_FORMAT_ID) || |
325 | read(fd, &read_data, sizeof(read_data)) == -1) | |
326 | return -1; | |
327 | ||
328 | if (evsel->attr.read_format & PERF_FORMAT_TOTAL_TIME_ENABLED) | |
329 | ++id_idx; | |
330 | if (evsel->attr.read_format & PERF_FORMAT_TOTAL_TIME_RUNNING) | |
331 | ++id_idx; | |
332 | ||
e2b5abe0 JO |
333 | id = read_data[id_idx]; |
334 | ||
335 | add: | |
336 | perf_evlist__id_add(evlist, evsel, cpu, thread, id); | |
f8a95309 ACM |
337 | return 0; |
338 | } | |
339 | ||
70db7533 ACM |
340 | struct perf_evsel *perf_evlist__id2evsel(struct perf_evlist *evlist, u64 id) |
341 | { | |
342 | struct hlist_head *head; | |
70db7533 ACM |
343 | struct perf_sample_id *sid; |
344 | int hash; | |
345 | ||
346 | if (evlist->nr_entries == 1) | |
0c21f736 | 347 | return perf_evlist__first(evlist); |
70db7533 ACM |
348 | |
349 | hash = hash_64(id, PERF_EVLIST__HLIST_BITS); | |
350 | head = &evlist->heads[hash]; | |
351 | ||
b67bfe0d | 352 | hlist_for_each_entry(sid, head, node) |
70db7533 ACM |
353 | if (sid->id == id) |
354 | return sid->evsel; | |
30e68bcc NK |
355 | |
356 | if (!perf_evlist__sample_id_all(evlist)) | |
0c21f736 | 357 | return perf_evlist__first(evlist); |
30e68bcc | 358 | |
70db7533 ACM |
359 | return NULL; |
360 | } | |
04391deb | 361 | |
aece948f | 362 | union perf_event *perf_evlist__mmap_read(struct perf_evlist *evlist, int idx) |
04391deb | 363 | { |
aece948f | 364 | struct perf_mmap *md = &evlist->mmap[idx]; |
04391deb ACM |
365 | unsigned int head = perf_mmap__read_head(md); |
366 | unsigned int old = md->prev; | |
367 | unsigned char *data = md->base + page_size; | |
8115d60c | 368 | union perf_event *event = NULL; |
04391deb | 369 | |
7bb41152 | 370 | if (evlist->overwrite) { |
04391deb | 371 | /* |
7bb41152 ACM |
372 | * If we're further behind than half the buffer, there's a chance |
373 | * the writer will bite our tail and mess up the samples under us. | |
374 | * | |
375 | * If we somehow ended up ahead of the head, we got messed up. | |
376 | * | |
377 | * In either case, truncate and restart at head. | |
04391deb | 378 | */ |
7bb41152 ACM |
379 | int diff = head - old; |
380 | if (diff > md->mask / 2 || diff < 0) { | |
381 | fprintf(stderr, "WARNING: failed to keep up with mmap data.\n"); | |
382 | ||
383 | /* | |
384 | * head points to a known good entry, start there. | |
385 | */ | |
386 | old = head; | |
387 | } | |
04391deb ACM |
388 | } |
389 | ||
390 | if (old != head) { | |
391 | size_t size; | |
392 | ||
8115d60c | 393 | event = (union perf_event *)&data[old & md->mask]; |
04391deb ACM |
394 | size = event->header.size; |
395 | ||
396 | /* | |
397 | * Event straddles the mmap boundary -- header should always | |
398 | * be inside due to u64 alignment of output. | |
399 | */ | |
400 | if ((old & md->mask) + size != ((old + size) & md->mask)) { | |
401 | unsigned int offset = old; | |
402 | unsigned int len = min(sizeof(*event), size), cpy; | |
0479b8b9 | 403 | void *dst = &md->event_copy; |
04391deb ACM |
404 | |
405 | do { | |
406 | cpy = min(md->mask + 1 - (offset & md->mask), len); | |
407 | memcpy(dst, &data[offset & md->mask], cpy); | |
408 | offset += cpy; | |
409 | dst += cpy; | |
410 | len -= cpy; | |
411 | } while (len); | |
412 | ||
0479b8b9 | 413 | event = &md->event_copy; |
04391deb ACM |
414 | } |
415 | ||
416 | old += size; | |
417 | } | |
418 | ||
419 | md->prev = old; | |
7bb41152 ACM |
420 | |
421 | if (!evlist->overwrite) | |
422 | perf_mmap__write_tail(md, old); | |
423 | ||
04391deb ACM |
424 | return event; |
425 | } | |
f8a95309 | 426 | |
93edcbd9 AH |
427 | static void __perf_evlist__munmap(struct perf_evlist *evlist, int idx) |
428 | { | |
429 | if (evlist->mmap[idx].base != NULL) { | |
430 | munmap(evlist->mmap[idx].base, evlist->mmap_len); | |
431 | evlist->mmap[idx].base = NULL; | |
432 | } | |
433 | } | |
434 | ||
7e2ed097 | 435 | void perf_evlist__munmap(struct perf_evlist *evlist) |
f8a95309 | 436 | { |
aece948f | 437 | int i; |
f8a95309 | 438 | |
93edcbd9 AH |
439 | for (i = 0; i < evlist->nr_mmaps; i++) |
440 | __perf_evlist__munmap(evlist, i); | |
aece948f ACM |
441 | |
442 | free(evlist->mmap); | |
443 | evlist->mmap = NULL; | |
f8a95309 ACM |
444 | } |
445 | ||
806fb630 | 446 | static int perf_evlist__alloc_mmap(struct perf_evlist *evlist) |
f8a95309 | 447 | { |
a14bb7a6 | 448 | evlist->nr_mmaps = cpu_map__nr(evlist->cpus); |
ec1e7e43 | 449 | if (cpu_map__empty(evlist->cpus)) |
b3a319d5 | 450 | evlist->nr_mmaps = thread_map__nr(evlist->threads); |
aece948f | 451 | evlist->mmap = zalloc(evlist->nr_mmaps * sizeof(struct perf_mmap)); |
f8a95309 ACM |
452 | return evlist->mmap != NULL ? 0 : -ENOMEM; |
453 | } | |
454 | ||
bccdaba0 | 455 | static int __perf_evlist__mmap(struct perf_evlist *evlist, |
aece948f | 456 | int idx, int prot, int mask, int fd) |
f8a95309 | 457 | { |
aece948f ACM |
458 | evlist->mmap[idx].prev = 0; |
459 | evlist->mmap[idx].mask = mask; | |
460 | evlist->mmap[idx].base = mmap(NULL, evlist->mmap_len, prot, | |
f8a95309 | 461 | MAP_SHARED, fd, 0); |
301b195d NE |
462 | if (evlist->mmap[idx].base == MAP_FAILED) { |
463 | evlist->mmap[idx].base = NULL; | |
f8a95309 | 464 | return -1; |
301b195d | 465 | } |
f8a95309 ACM |
466 | |
467 | perf_evlist__add_pollfd(evlist, fd); | |
468 | return 0; | |
469 | } | |
470 | ||
aece948f ACM |
471 | static int perf_evlist__mmap_per_cpu(struct perf_evlist *evlist, int prot, int mask) |
472 | { | |
473 | struct perf_evsel *evsel; | |
474 | int cpu, thread; | |
b3a319d5 NK |
475 | int nr_cpus = cpu_map__nr(evlist->cpus); |
476 | int nr_threads = thread_map__nr(evlist->threads); | |
aece948f | 477 | |
b3a319d5 | 478 | for (cpu = 0; cpu < nr_cpus; cpu++) { |
aece948f ACM |
479 | int output = -1; |
480 | ||
b3a319d5 | 481 | for (thread = 0; thread < nr_threads; thread++) { |
aece948f ACM |
482 | list_for_each_entry(evsel, &evlist->entries, node) { |
483 | int fd = FD(evsel, cpu, thread); | |
484 | ||
485 | if (output == -1) { | |
486 | output = fd; | |
bccdaba0 | 487 | if (__perf_evlist__mmap(evlist, cpu, |
aece948f ACM |
488 | prot, mask, output) < 0) |
489 | goto out_unmap; | |
490 | } else { | |
491 | if (ioctl(fd, PERF_EVENT_IOC_SET_OUTPUT, output) != 0) | |
492 | goto out_unmap; | |
493 | } | |
494 | ||
495 | if ((evsel->attr.read_format & PERF_FORMAT_ID) && | |
496 | perf_evlist__id_add_fd(evlist, evsel, cpu, thread, fd) < 0) | |
497 | goto out_unmap; | |
498 | } | |
499 | } | |
500 | } | |
501 | ||
502 | return 0; | |
503 | ||
504 | out_unmap: | |
93edcbd9 AH |
505 | for (cpu = 0; cpu < nr_cpus; cpu++) |
506 | __perf_evlist__munmap(evlist, cpu); | |
aece948f ACM |
507 | return -1; |
508 | } | |
509 | ||
510 | static int perf_evlist__mmap_per_thread(struct perf_evlist *evlist, int prot, int mask) | |
511 | { | |
512 | struct perf_evsel *evsel; | |
513 | int thread; | |
b3a319d5 | 514 | int nr_threads = thread_map__nr(evlist->threads); |
aece948f | 515 | |
b3a319d5 | 516 | for (thread = 0; thread < nr_threads; thread++) { |
aece948f ACM |
517 | int output = -1; |
518 | ||
519 | list_for_each_entry(evsel, &evlist->entries, node) { | |
520 | int fd = FD(evsel, 0, thread); | |
521 | ||
522 | if (output == -1) { | |
523 | output = fd; | |
bccdaba0 | 524 | if (__perf_evlist__mmap(evlist, thread, |
aece948f ACM |
525 | prot, mask, output) < 0) |
526 | goto out_unmap; | |
527 | } else { | |
528 | if (ioctl(fd, PERF_EVENT_IOC_SET_OUTPUT, output) != 0) | |
529 | goto out_unmap; | |
530 | } | |
531 | ||
532 | if ((evsel->attr.read_format & PERF_FORMAT_ID) && | |
533 | perf_evlist__id_add_fd(evlist, evsel, 0, thread, fd) < 0) | |
534 | goto out_unmap; | |
535 | } | |
536 | } | |
537 | ||
538 | return 0; | |
539 | ||
540 | out_unmap: | |
93edcbd9 AH |
541 | for (thread = 0; thread < nr_threads; thread++) |
542 | __perf_evlist__munmap(evlist, thread); | |
aece948f ACM |
543 | return -1; |
544 | } | |
545 | ||
f8a95309 ACM |
546 | /** perf_evlist__mmap - Create per cpu maps to receive events |
547 | * | |
548 | * @evlist - list of events | |
f8a95309 ACM |
549 | * @pages - map length in pages |
550 | * @overwrite - overwrite older events? | |
551 | * | |
552 | * If overwrite is false the user needs to signal event consuption using: | |
553 | * | |
554 | * struct perf_mmap *m = &evlist->mmap[cpu]; | |
555 | * unsigned int head = perf_mmap__read_head(m); | |
556 | * | |
557 | * perf_mmap__write_tail(m, head) | |
7e2ed097 ACM |
558 | * |
559 | * Using perf_evlist__read_on_cpu does this automatically. | |
f8a95309 | 560 | */ |
50a682ce ACM |
561 | int perf_evlist__mmap(struct perf_evlist *evlist, unsigned int pages, |
562 | bool overwrite) | |
f8a95309 | 563 | { |
aece948f | 564 | struct perf_evsel *evsel; |
7e2ed097 ACM |
565 | const struct cpu_map *cpus = evlist->cpus; |
566 | const struct thread_map *threads = evlist->threads; | |
50a682ce ACM |
567 | int prot = PROT_READ | (overwrite ? 0 : PROT_WRITE), mask; |
568 | ||
569 | /* 512 kiB: default amount of unprivileged mlocked memory */ | |
570 | if (pages == UINT_MAX) | |
571 | pages = (512 * 1024) / page_size; | |
41d0d933 NE |
572 | else if (!is_power_of_2(pages)) |
573 | return -EINVAL; | |
50a682ce ACM |
574 | |
575 | mask = pages * page_size - 1; | |
f8a95309 | 576 | |
7e2ed097 | 577 | if (evlist->mmap == NULL && perf_evlist__alloc_mmap(evlist) < 0) |
f8a95309 ACM |
578 | return -ENOMEM; |
579 | ||
7e2ed097 | 580 | if (evlist->pollfd == NULL && perf_evlist__alloc_pollfd(evlist) < 0) |
f8a95309 ACM |
581 | return -ENOMEM; |
582 | ||
583 | evlist->overwrite = overwrite; | |
584 | evlist->mmap_len = (pages + 1) * page_size; | |
f8a95309 ACM |
585 | |
586 | list_for_each_entry(evsel, &evlist->entries, node) { | |
587 | if ((evsel->attr.read_format & PERF_FORMAT_ID) && | |
a91e5431 | 588 | evsel->sample_id == NULL && |
a14bb7a6 | 589 | perf_evsel__alloc_id(evsel, cpu_map__nr(cpus), threads->nr) < 0) |
f8a95309 | 590 | return -ENOMEM; |
f8a95309 ACM |
591 | } |
592 | ||
ec1e7e43 | 593 | if (cpu_map__empty(cpus)) |
aece948f | 594 | return perf_evlist__mmap_per_thread(evlist, prot, mask); |
f8a95309 | 595 | |
aece948f | 596 | return perf_evlist__mmap_per_cpu(evlist, prot, mask); |
f8a95309 | 597 | } |
7e2ed097 | 598 | |
b809ac10 NK |
599 | int perf_evlist__create_maps(struct perf_evlist *evlist, |
600 | struct perf_target *target) | |
7e2ed097 | 601 | { |
b809ac10 NK |
602 | evlist->threads = thread_map__new_str(target->pid, target->tid, |
603 | target->uid); | |
7e2ed097 ACM |
604 | |
605 | if (evlist->threads == NULL) | |
606 | return -1; | |
607 | ||
879d77d0 | 608 | if (perf_target__has_task(target)) |
d67356e7 | 609 | evlist->cpus = cpu_map__dummy_new(); |
d1cb9fce NK |
610 | else if (!perf_target__has_cpu(target) && !target->uses_mmap) |
611 | evlist->cpus = cpu_map__dummy_new(); | |
879d77d0 NK |
612 | else |
613 | evlist->cpus = cpu_map__new(target->cpu_list); | |
7e2ed097 ACM |
614 | |
615 | if (evlist->cpus == NULL) | |
616 | goto out_delete_threads; | |
617 | ||
618 | return 0; | |
619 | ||
620 | out_delete_threads: | |
621 | thread_map__delete(evlist->threads); | |
622 | return -1; | |
623 | } | |
624 | ||
625 | void perf_evlist__delete_maps(struct perf_evlist *evlist) | |
626 | { | |
627 | cpu_map__delete(evlist->cpus); | |
628 | thread_map__delete(evlist->threads); | |
629 | evlist->cpus = NULL; | |
630 | evlist->threads = NULL; | |
631 | } | |
0a102479 | 632 | |
1491a632 | 633 | int perf_evlist__apply_filters(struct perf_evlist *evlist) |
0a102479 | 634 | { |
0a102479 | 635 | struct perf_evsel *evsel; |
745cefc5 ACM |
636 | int err = 0; |
637 | const int ncpus = cpu_map__nr(evlist->cpus), | |
b3a319d5 | 638 | nthreads = thread_map__nr(evlist->threads); |
0a102479 FW |
639 | |
640 | list_for_each_entry(evsel, &evlist->entries, node) { | |
745cefc5 | 641 | if (evsel->filter == NULL) |
0a102479 | 642 | continue; |
745cefc5 ACM |
643 | |
644 | err = perf_evsel__set_filter(evsel, ncpus, nthreads, evsel->filter); | |
645 | if (err) | |
646 | break; | |
0a102479 FW |
647 | } |
648 | ||
745cefc5 ACM |
649 | return err; |
650 | } | |
651 | ||
652 | int perf_evlist__set_filter(struct perf_evlist *evlist, const char *filter) | |
653 | { | |
654 | struct perf_evsel *evsel; | |
655 | int err = 0; | |
656 | const int ncpus = cpu_map__nr(evlist->cpus), | |
b3a319d5 | 657 | nthreads = thread_map__nr(evlist->threads); |
745cefc5 ACM |
658 | |
659 | list_for_each_entry(evsel, &evlist->entries, node) { | |
660 | err = perf_evsel__set_filter(evsel, ncpus, nthreads, filter); | |
661 | if (err) | |
662 | break; | |
663 | } | |
664 | ||
665 | return err; | |
0a102479 | 666 | } |
74429964 | 667 | |
0c21f736 | 668 | bool perf_evlist__valid_sample_type(struct perf_evlist *evlist) |
74429964 | 669 | { |
0c21f736 | 670 | struct perf_evsel *first = perf_evlist__first(evlist), *pos = first; |
c2a70653 ACM |
671 | |
672 | list_for_each_entry_continue(pos, &evlist->entries, node) { | |
673 | if (first->attr.sample_type != pos->attr.sample_type) | |
674 | return false; | |
74429964 FW |
675 | } |
676 | ||
c2a70653 | 677 | return true; |
74429964 FW |
678 | } |
679 | ||
0c21f736 | 680 | u64 perf_evlist__sample_type(struct perf_evlist *evlist) |
c2a70653 | 681 | { |
0c21f736 | 682 | struct perf_evsel *first = perf_evlist__first(evlist); |
c2a70653 ACM |
683 | return first->attr.sample_type; |
684 | } | |
685 | ||
9ede473c JO |
686 | bool perf_evlist__valid_read_format(struct perf_evlist *evlist) |
687 | { | |
688 | struct perf_evsel *first = perf_evlist__first(evlist), *pos = first; | |
689 | u64 read_format = first->attr.read_format; | |
690 | u64 sample_type = first->attr.sample_type; | |
691 | ||
692 | list_for_each_entry_continue(pos, &evlist->entries, node) { | |
693 | if (read_format != pos->attr.read_format) | |
694 | return false; | |
695 | } | |
696 | ||
697 | /* PERF_SAMPLE_READ imples PERF_FORMAT_ID. */ | |
698 | if ((sample_type & PERF_SAMPLE_READ) && | |
699 | !(read_format & PERF_FORMAT_ID)) { | |
700 | return false; | |
701 | } | |
702 | ||
703 | return true; | |
704 | } | |
705 | ||
706 | u64 perf_evlist__read_format(struct perf_evlist *evlist) | |
707 | { | |
708 | struct perf_evsel *first = perf_evlist__first(evlist); | |
709 | return first->attr.read_format; | |
710 | } | |
711 | ||
0c21f736 | 712 | u16 perf_evlist__id_hdr_size(struct perf_evlist *evlist) |
81e36bff | 713 | { |
0c21f736 | 714 | struct perf_evsel *first = perf_evlist__first(evlist); |
81e36bff ACM |
715 | struct perf_sample *data; |
716 | u64 sample_type; | |
717 | u16 size = 0; | |
718 | ||
81e36bff ACM |
719 | if (!first->attr.sample_id_all) |
720 | goto out; | |
721 | ||
722 | sample_type = first->attr.sample_type; | |
723 | ||
724 | if (sample_type & PERF_SAMPLE_TID) | |
725 | size += sizeof(data->tid) * 2; | |
726 | ||
727 | if (sample_type & PERF_SAMPLE_TIME) | |
728 | size += sizeof(data->time); | |
729 | ||
730 | if (sample_type & PERF_SAMPLE_ID) | |
731 | size += sizeof(data->id); | |
732 | ||
733 | if (sample_type & PERF_SAMPLE_STREAM_ID) | |
734 | size += sizeof(data->stream_id); | |
735 | ||
736 | if (sample_type & PERF_SAMPLE_CPU) | |
737 | size += sizeof(data->cpu) * 2; | |
738 | out: | |
739 | return size; | |
740 | } | |
741 | ||
0c21f736 | 742 | bool perf_evlist__valid_sample_id_all(struct perf_evlist *evlist) |
74429964 | 743 | { |
0c21f736 | 744 | struct perf_evsel *first = perf_evlist__first(evlist), *pos = first; |
c2a70653 ACM |
745 | |
746 | list_for_each_entry_continue(pos, &evlist->entries, node) { | |
747 | if (first->attr.sample_id_all != pos->attr.sample_id_all) | |
748 | return false; | |
74429964 FW |
749 | } |
750 | ||
c2a70653 ACM |
751 | return true; |
752 | } | |
753 | ||
0c21f736 | 754 | bool perf_evlist__sample_id_all(struct perf_evlist *evlist) |
c2a70653 | 755 | { |
0c21f736 | 756 | struct perf_evsel *first = perf_evlist__first(evlist); |
c2a70653 | 757 | return first->attr.sample_id_all; |
74429964 | 758 | } |
81cce8de ACM |
759 | |
760 | void perf_evlist__set_selected(struct perf_evlist *evlist, | |
761 | struct perf_evsel *evsel) | |
762 | { | |
763 | evlist->selected = evsel; | |
764 | } | |
727ab04e | 765 | |
a74b4b66 NK |
766 | void perf_evlist__close(struct perf_evlist *evlist) |
767 | { | |
768 | struct perf_evsel *evsel; | |
769 | int ncpus = cpu_map__nr(evlist->cpus); | |
770 | int nthreads = thread_map__nr(evlist->threads); | |
771 | ||
772 | list_for_each_entry_reverse(evsel, &evlist->entries, node) | |
773 | perf_evsel__close(evsel, ncpus, nthreads); | |
774 | } | |
775 | ||
6a4bb04c | 776 | int perf_evlist__open(struct perf_evlist *evlist) |
727ab04e | 777 | { |
6a4bb04c | 778 | struct perf_evsel *evsel; |
a74b4b66 | 779 | int err; |
727ab04e | 780 | |
727ab04e | 781 | list_for_each_entry(evsel, &evlist->entries, node) { |
6a4bb04c | 782 | err = perf_evsel__open(evsel, evlist->cpus, evlist->threads); |
727ab04e ACM |
783 | if (err < 0) |
784 | goto out_err; | |
785 | } | |
786 | ||
787 | return 0; | |
788 | out_err: | |
a74b4b66 | 789 | perf_evlist__close(evlist); |
41c21a68 | 790 | errno = -err; |
727ab04e ACM |
791 | return err; |
792 | } | |
35b9d88e ACM |
793 | |
794 | int perf_evlist__prepare_workload(struct perf_evlist *evlist, | |
6ef73ec4 | 795 | struct perf_target *target, |
55e162ea NK |
796 | const char *argv[], bool pipe_output, |
797 | bool want_signal) | |
35b9d88e ACM |
798 | { |
799 | int child_ready_pipe[2], go_pipe[2]; | |
800 | char bf; | |
801 | ||
802 | if (pipe(child_ready_pipe) < 0) { | |
803 | perror("failed to create 'ready' pipe"); | |
804 | return -1; | |
805 | } | |
806 | ||
807 | if (pipe(go_pipe) < 0) { | |
808 | perror("failed to create 'go' pipe"); | |
809 | goto out_close_ready_pipe; | |
810 | } | |
811 | ||
812 | evlist->workload.pid = fork(); | |
813 | if (evlist->workload.pid < 0) { | |
814 | perror("failed to fork"); | |
815 | goto out_close_pipes; | |
816 | } | |
817 | ||
818 | if (!evlist->workload.pid) { | |
119fa3c9 | 819 | if (pipe_output) |
35b9d88e ACM |
820 | dup2(2, 1); |
821 | ||
0817df08 DA |
822 | signal(SIGTERM, SIG_DFL); |
823 | ||
35b9d88e ACM |
824 | close(child_ready_pipe[0]); |
825 | close(go_pipe[1]); | |
826 | fcntl(go_pipe[0], F_SETFD, FD_CLOEXEC); | |
827 | ||
828 | /* | |
829 | * Do a dummy execvp to get the PLT entry resolved, | |
830 | * so we avoid the resolver overhead on the real | |
831 | * execvp call. | |
832 | */ | |
833 | execvp("", (char **)argv); | |
834 | ||
835 | /* | |
836 | * Tell the parent we're ready to go | |
837 | */ | |
838 | close(child_ready_pipe[1]); | |
839 | ||
840 | /* | |
841 | * Wait until the parent tells us to go. | |
842 | */ | |
843 | if (read(go_pipe[0], &bf, 1) == -1) | |
844 | perror("unable to read pipe"); | |
845 | ||
846 | execvp(argv[0], (char **)argv); | |
847 | ||
848 | perror(argv[0]); | |
55e162ea NK |
849 | if (want_signal) |
850 | kill(getppid(), SIGUSR1); | |
35b9d88e ACM |
851 | exit(-1); |
852 | } | |
853 | ||
6ef73ec4 | 854 | if (perf_target__none(target)) |
35b9d88e ACM |
855 | evlist->threads->map[0] = evlist->workload.pid; |
856 | ||
857 | close(child_ready_pipe[1]); | |
858 | close(go_pipe[0]); | |
859 | /* | |
860 | * wait for child to settle | |
861 | */ | |
862 | if (read(child_ready_pipe[0], &bf, 1) == -1) { | |
863 | perror("unable to read pipe"); | |
864 | goto out_close_pipes; | |
865 | } | |
866 | ||
bcf3145f | 867 | fcntl(go_pipe[1], F_SETFD, FD_CLOEXEC); |
35b9d88e ACM |
868 | evlist->workload.cork_fd = go_pipe[1]; |
869 | close(child_ready_pipe[0]); | |
870 | return 0; | |
871 | ||
872 | out_close_pipes: | |
873 | close(go_pipe[0]); | |
874 | close(go_pipe[1]); | |
875 | out_close_ready_pipe: | |
876 | close(child_ready_pipe[0]); | |
877 | close(child_ready_pipe[1]); | |
878 | return -1; | |
879 | } | |
880 | ||
881 | int perf_evlist__start_workload(struct perf_evlist *evlist) | |
882 | { | |
883 | if (evlist->workload.cork_fd > 0) { | |
b3824404 | 884 | char bf = 0; |
bcf3145f | 885 | int ret; |
35b9d88e ACM |
886 | /* |
887 | * Remove the cork, let it rip! | |
888 | */ | |
bcf3145f NK |
889 | ret = write(evlist->workload.cork_fd, &bf, 1); |
890 | if (ret < 0) | |
891 | perror("enable to write to pipe"); | |
892 | ||
893 | close(evlist->workload.cork_fd); | |
894 | return ret; | |
35b9d88e ACM |
895 | } |
896 | ||
897 | return 0; | |
898 | } | |
cb0b29e0 | 899 | |
a3f698fe | 900 | int perf_evlist__parse_sample(struct perf_evlist *evlist, union perf_event *event, |
0807d2d8 | 901 | struct perf_sample *sample) |
cb0b29e0 | 902 | { |
0c21f736 | 903 | struct perf_evsel *evsel = perf_evlist__first(evlist); |
0807d2d8 | 904 | return perf_evsel__parse_sample(evsel, event, sample); |
cb0b29e0 | 905 | } |
78f067b3 ACM |
906 | |
907 | size_t perf_evlist__fprintf(struct perf_evlist *evlist, FILE *fp) | |
908 | { | |
909 | struct perf_evsel *evsel; | |
910 | size_t printed = 0; | |
911 | ||
912 | list_for_each_entry(evsel, &evlist->entries, node) { | |
913 | printed += fprintf(fp, "%s%s", evsel->idx ? ", " : "", | |
914 | perf_evsel__name(evsel)); | |
915 | } | |
916 | ||
917 | return printed + fprintf(fp, "\n");; | |
918 | } |