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 ACM |
316 | |
317 | if (!(evsel->attr.read_format & PERF_FORMAT_ID) || | |
318 | read(fd, &read_data, sizeof(read_data)) == -1) | |
319 | return -1; | |
320 | ||
321 | if (evsel->attr.read_format & PERF_FORMAT_TOTAL_TIME_ENABLED) | |
322 | ++id_idx; | |
323 | if (evsel->attr.read_format & PERF_FORMAT_TOTAL_TIME_RUNNING) | |
324 | ++id_idx; | |
325 | ||
e2b5abe0 JO |
326 | id = read_data[id_idx]; |
327 | ||
328 | add: | |
329 | perf_evlist__id_add(evlist, evsel, cpu, thread, id); | |
f8a95309 ACM |
330 | return 0; |
331 | } | |
332 | ||
70db7533 ACM |
333 | struct perf_evsel *perf_evlist__id2evsel(struct perf_evlist *evlist, u64 id) |
334 | { | |
335 | struct hlist_head *head; | |
70db7533 ACM |
336 | struct perf_sample_id *sid; |
337 | int hash; | |
338 | ||
339 | if (evlist->nr_entries == 1) | |
0c21f736 | 340 | return perf_evlist__first(evlist); |
70db7533 ACM |
341 | |
342 | hash = hash_64(id, PERF_EVLIST__HLIST_BITS); | |
343 | head = &evlist->heads[hash]; | |
344 | ||
b67bfe0d | 345 | hlist_for_each_entry(sid, head, node) |
70db7533 ACM |
346 | if (sid->id == id) |
347 | return sid->evsel; | |
30e68bcc NK |
348 | |
349 | if (!perf_evlist__sample_id_all(evlist)) | |
0c21f736 | 350 | return perf_evlist__first(evlist); |
30e68bcc | 351 | |
70db7533 ACM |
352 | return NULL; |
353 | } | |
04391deb | 354 | |
aece948f | 355 | union perf_event *perf_evlist__mmap_read(struct perf_evlist *evlist, int idx) |
04391deb | 356 | { |
aece948f | 357 | struct perf_mmap *md = &evlist->mmap[idx]; |
04391deb ACM |
358 | unsigned int head = perf_mmap__read_head(md); |
359 | unsigned int old = md->prev; | |
360 | unsigned char *data = md->base + page_size; | |
8115d60c | 361 | union perf_event *event = NULL; |
04391deb | 362 | |
7bb41152 | 363 | if (evlist->overwrite) { |
04391deb | 364 | /* |
7bb41152 ACM |
365 | * If we're further behind than half the buffer, there's a chance |
366 | * the writer will bite our tail and mess up the samples under us. | |
367 | * | |
368 | * If we somehow ended up ahead of the head, we got messed up. | |
369 | * | |
370 | * In either case, truncate and restart at head. | |
04391deb | 371 | */ |
7bb41152 ACM |
372 | int diff = head - old; |
373 | if (diff > md->mask / 2 || diff < 0) { | |
374 | fprintf(stderr, "WARNING: failed to keep up with mmap data.\n"); | |
375 | ||
376 | /* | |
377 | * head points to a known good entry, start there. | |
378 | */ | |
379 | old = head; | |
380 | } | |
04391deb ACM |
381 | } |
382 | ||
383 | if (old != head) { | |
384 | size_t size; | |
385 | ||
8115d60c | 386 | event = (union perf_event *)&data[old & md->mask]; |
04391deb ACM |
387 | size = event->header.size; |
388 | ||
389 | /* | |
390 | * Event straddles the mmap boundary -- header should always | |
391 | * be inside due to u64 alignment of output. | |
392 | */ | |
393 | if ((old & md->mask) + size != ((old + size) & md->mask)) { | |
394 | unsigned int offset = old; | |
395 | unsigned int len = min(sizeof(*event), size), cpy; | |
0479b8b9 | 396 | void *dst = &md->event_copy; |
04391deb ACM |
397 | |
398 | do { | |
399 | cpy = min(md->mask + 1 - (offset & md->mask), len); | |
400 | memcpy(dst, &data[offset & md->mask], cpy); | |
401 | offset += cpy; | |
402 | dst += cpy; | |
403 | len -= cpy; | |
404 | } while (len); | |
405 | ||
0479b8b9 | 406 | event = &md->event_copy; |
04391deb ACM |
407 | } |
408 | ||
409 | old += size; | |
410 | } | |
411 | ||
412 | md->prev = old; | |
7bb41152 ACM |
413 | |
414 | if (!evlist->overwrite) | |
415 | perf_mmap__write_tail(md, old); | |
416 | ||
04391deb ACM |
417 | return event; |
418 | } | |
f8a95309 | 419 | |
93edcbd9 AH |
420 | static void __perf_evlist__munmap(struct perf_evlist *evlist, int idx) |
421 | { | |
422 | if (evlist->mmap[idx].base != NULL) { | |
423 | munmap(evlist->mmap[idx].base, evlist->mmap_len); | |
424 | evlist->mmap[idx].base = NULL; | |
425 | } | |
426 | } | |
427 | ||
7e2ed097 | 428 | void perf_evlist__munmap(struct perf_evlist *evlist) |
f8a95309 | 429 | { |
aece948f | 430 | int i; |
f8a95309 | 431 | |
93edcbd9 AH |
432 | for (i = 0; i < evlist->nr_mmaps; i++) |
433 | __perf_evlist__munmap(evlist, i); | |
aece948f ACM |
434 | |
435 | free(evlist->mmap); | |
436 | evlist->mmap = NULL; | |
f8a95309 ACM |
437 | } |
438 | ||
806fb630 | 439 | static int perf_evlist__alloc_mmap(struct perf_evlist *evlist) |
f8a95309 | 440 | { |
a14bb7a6 | 441 | evlist->nr_mmaps = cpu_map__nr(evlist->cpus); |
ec1e7e43 | 442 | if (cpu_map__empty(evlist->cpus)) |
b3a319d5 | 443 | evlist->nr_mmaps = thread_map__nr(evlist->threads); |
aece948f | 444 | evlist->mmap = zalloc(evlist->nr_mmaps * sizeof(struct perf_mmap)); |
f8a95309 ACM |
445 | return evlist->mmap != NULL ? 0 : -ENOMEM; |
446 | } | |
447 | ||
bccdaba0 | 448 | static int __perf_evlist__mmap(struct perf_evlist *evlist, |
aece948f | 449 | int idx, int prot, int mask, int fd) |
f8a95309 | 450 | { |
aece948f ACM |
451 | evlist->mmap[idx].prev = 0; |
452 | evlist->mmap[idx].mask = mask; | |
453 | evlist->mmap[idx].base = mmap(NULL, evlist->mmap_len, prot, | |
f8a95309 | 454 | MAP_SHARED, fd, 0); |
301b195d NE |
455 | if (evlist->mmap[idx].base == MAP_FAILED) { |
456 | evlist->mmap[idx].base = NULL; | |
f8a95309 | 457 | return -1; |
301b195d | 458 | } |
f8a95309 ACM |
459 | |
460 | perf_evlist__add_pollfd(evlist, fd); | |
461 | return 0; | |
462 | } | |
463 | ||
aece948f ACM |
464 | static int perf_evlist__mmap_per_cpu(struct perf_evlist *evlist, int prot, int mask) |
465 | { | |
466 | struct perf_evsel *evsel; | |
467 | int cpu, thread; | |
b3a319d5 NK |
468 | int nr_cpus = cpu_map__nr(evlist->cpus); |
469 | int nr_threads = thread_map__nr(evlist->threads); | |
aece948f | 470 | |
b3a319d5 | 471 | for (cpu = 0; cpu < nr_cpus; cpu++) { |
aece948f ACM |
472 | int output = -1; |
473 | ||
b3a319d5 | 474 | for (thread = 0; thread < nr_threads; thread++) { |
aece948f ACM |
475 | list_for_each_entry(evsel, &evlist->entries, node) { |
476 | int fd = FD(evsel, cpu, thread); | |
477 | ||
478 | if (output == -1) { | |
479 | output = fd; | |
bccdaba0 | 480 | if (__perf_evlist__mmap(evlist, cpu, |
aece948f ACM |
481 | prot, mask, output) < 0) |
482 | goto out_unmap; | |
483 | } else { | |
484 | if (ioctl(fd, PERF_EVENT_IOC_SET_OUTPUT, output) != 0) | |
485 | goto out_unmap; | |
486 | } | |
487 | ||
488 | if ((evsel->attr.read_format & PERF_FORMAT_ID) && | |
489 | perf_evlist__id_add_fd(evlist, evsel, cpu, thread, fd) < 0) | |
490 | goto out_unmap; | |
491 | } | |
492 | } | |
493 | } | |
494 | ||
495 | return 0; | |
496 | ||
497 | out_unmap: | |
93edcbd9 AH |
498 | for (cpu = 0; cpu < nr_cpus; cpu++) |
499 | __perf_evlist__munmap(evlist, cpu); | |
aece948f ACM |
500 | return -1; |
501 | } | |
502 | ||
503 | static int perf_evlist__mmap_per_thread(struct perf_evlist *evlist, int prot, int mask) | |
504 | { | |
505 | struct perf_evsel *evsel; | |
506 | int thread; | |
b3a319d5 | 507 | int nr_threads = thread_map__nr(evlist->threads); |
aece948f | 508 | |
b3a319d5 | 509 | for (thread = 0; thread < nr_threads; thread++) { |
aece948f ACM |
510 | int output = -1; |
511 | ||
512 | list_for_each_entry(evsel, &evlist->entries, node) { | |
513 | int fd = FD(evsel, 0, thread); | |
514 | ||
515 | if (output == -1) { | |
516 | output = fd; | |
bccdaba0 | 517 | if (__perf_evlist__mmap(evlist, thread, |
aece948f ACM |
518 | prot, mask, output) < 0) |
519 | goto out_unmap; | |
520 | } else { | |
521 | if (ioctl(fd, PERF_EVENT_IOC_SET_OUTPUT, output) != 0) | |
522 | goto out_unmap; | |
523 | } | |
524 | ||
525 | if ((evsel->attr.read_format & PERF_FORMAT_ID) && | |
526 | perf_evlist__id_add_fd(evlist, evsel, 0, thread, fd) < 0) | |
527 | goto out_unmap; | |
528 | } | |
529 | } | |
530 | ||
531 | return 0; | |
532 | ||
533 | out_unmap: | |
93edcbd9 AH |
534 | for (thread = 0; thread < nr_threads; thread++) |
535 | __perf_evlist__munmap(evlist, thread); | |
aece948f ACM |
536 | return -1; |
537 | } | |
538 | ||
f8a95309 ACM |
539 | /** perf_evlist__mmap - Create per cpu maps to receive events |
540 | * | |
541 | * @evlist - list of events | |
f8a95309 ACM |
542 | * @pages - map length in pages |
543 | * @overwrite - overwrite older events? | |
544 | * | |
545 | * If overwrite is false the user needs to signal event consuption using: | |
546 | * | |
547 | * struct perf_mmap *m = &evlist->mmap[cpu]; | |
548 | * unsigned int head = perf_mmap__read_head(m); | |
549 | * | |
550 | * perf_mmap__write_tail(m, head) | |
7e2ed097 ACM |
551 | * |
552 | * Using perf_evlist__read_on_cpu does this automatically. | |
f8a95309 | 553 | */ |
50a682ce ACM |
554 | int perf_evlist__mmap(struct perf_evlist *evlist, unsigned int pages, |
555 | bool overwrite) | |
f8a95309 | 556 | { |
aece948f | 557 | struct perf_evsel *evsel; |
7e2ed097 ACM |
558 | const struct cpu_map *cpus = evlist->cpus; |
559 | const struct thread_map *threads = evlist->threads; | |
50a682ce ACM |
560 | int prot = PROT_READ | (overwrite ? 0 : PROT_WRITE), mask; |
561 | ||
562 | /* 512 kiB: default amount of unprivileged mlocked memory */ | |
563 | if (pages == UINT_MAX) | |
564 | pages = (512 * 1024) / page_size; | |
41d0d933 NE |
565 | else if (!is_power_of_2(pages)) |
566 | return -EINVAL; | |
50a682ce ACM |
567 | |
568 | mask = pages * page_size - 1; | |
f8a95309 | 569 | |
7e2ed097 | 570 | if (evlist->mmap == NULL && perf_evlist__alloc_mmap(evlist) < 0) |
f8a95309 ACM |
571 | return -ENOMEM; |
572 | ||
7e2ed097 | 573 | if (evlist->pollfd == NULL && perf_evlist__alloc_pollfd(evlist) < 0) |
f8a95309 ACM |
574 | return -ENOMEM; |
575 | ||
576 | evlist->overwrite = overwrite; | |
577 | evlist->mmap_len = (pages + 1) * page_size; | |
f8a95309 ACM |
578 | |
579 | list_for_each_entry(evsel, &evlist->entries, node) { | |
580 | if ((evsel->attr.read_format & PERF_FORMAT_ID) && | |
a91e5431 | 581 | evsel->sample_id == NULL && |
a14bb7a6 | 582 | perf_evsel__alloc_id(evsel, cpu_map__nr(cpus), threads->nr) < 0) |
f8a95309 | 583 | return -ENOMEM; |
f8a95309 ACM |
584 | } |
585 | ||
ec1e7e43 | 586 | if (cpu_map__empty(cpus)) |
aece948f | 587 | return perf_evlist__mmap_per_thread(evlist, prot, mask); |
f8a95309 | 588 | |
aece948f | 589 | return perf_evlist__mmap_per_cpu(evlist, prot, mask); |
f8a95309 | 590 | } |
7e2ed097 | 591 | |
b809ac10 NK |
592 | int perf_evlist__create_maps(struct perf_evlist *evlist, |
593 | struct perf_target *target) | |
7e2ed097 | 594 | { |
b809ac10 NK |
595 | evlist->threads = thread_map__new_str(target->pid, target->tid, |
596 | target->uid); | |
7e2ed097 ACM |
597 | |
598 | if (evlist->threads == NULL) | |
599 | return -1; | |
600 | ||
879d77d0 | 601 | if (perf_target__has_task(target)) |
d67356e7 | 602 | evlist->cpus = cpu_map__dummy_new(); |
d1cb9fce NK |
603 | else if (!perf_target__has_cpu(target) && !target->uses_mmap) |
604 | evlist->cpus = cpu_map__dummy_new(); | |
879d77d0 NK |
605 | else |
606 | evlist->cpus = cpu_map__new(target->cpu_list); | |
7e2ed097 ACM |
607 | |
608 | if (evlist->cpus == NULL) | |
609 | goto out_delete_threads; | |
610 | ||
611 | return 0; | |
612 | ||
613 | out_delete_threads: | |
614 | thread_map__delete(evlist->threads); | |
615 | return -1; | |
616 | } | |
617 | ||
618 | void perf_evlist__delete_maps(struct perf_evlist *evlist) | |
619 | { | |
620 | cpu_map__delete(evlist->cpus); | |
621 | thread_map__delete(evlist->threads); | |
622 | evlist->cpus = NULL; | |
623 | evlist->threads = NULL; | |
624 | } | |
0a102479 | 625 | |
1491a632 | 626 | int perf_evlist__apply_filters(struct perf_evlist *evlist) |
0a102479 | 627 | { |
0a102479 | 628 | struct perf_evsel *evsel; |
745cefc5 ACM |
629 | int err = 0; |
630 | const int ncpus = cpu_map__nr(evlist->cpus), | |
b3a319d5 | 631 | nthreads = thread_map__nr(evlist->threads); |
0a102479 FW |
632 | |
633 | list_for_each_entry(evsel, &evlist->entries, node) { | |
745cefc5 | 634 | if (evsel->filter == NULL) |
0a102479 | 635 | continue; |
745cefc5 ACM |
636 | |
637 | err = perf_evsel__set_filter(evsel, ncpus, nthreads, evsel->filter); | |
638 | if (err) | |
639 | break; | |
0a102479 FW |
640 | } |
641 | ||
745cefc5 ACM |
642 | return err; |
643 | } | |
644 | ||
645 | int perf_evlist__set_filter(struct perf_evlist *evlist, const char *filter) | |
646 | { | |
647 | struct perf_evsel *evsel; | |
648 | int err = 0; | |
649 | const int ncpus = cpu_map__nr(evlist->cpus), | |
b3a319d5 | 650 | nthreads = thread_map__nr(evlist->threads); |
745cefc5 ACM |
651 | |
652 | list_for_each_entry(evsel, &evlist->entries, node) { | |
653 | err = perf_evsel__set_filter(evsel, ncpus, nthreads, filter); | |
654 | if (err) | |
655 | break; | |
656 | } | |
657 | ||
658 | return err; | |
0a102479 | 659 | } |
74429964 | 660 | |
0c21f736 | 661 | bool perf_evlist__valid_sample_type(struct perf_evlist *evlist) |
74429964 | 662 | { |
0c21f736 | 663 | struct perf_evsel *first = perf_evlist__first(evlist), *pos = first; |
c2a70653 ACM |
664 | |
665 | list_for_each_entry_continue(pos, &evlist->entries, node) { | |
666 | if (first->attr.sample_type != pos->attr.sample_type) | |
667 | return false; | |
74429964 FW |
668 | } |
669 | ||
c2a70653 | 670 | return true; |
74429964 FW |
671 | } |
672 | ||
0c21f736 | 673 | u64 perf_evlist__sample_type(struct perf_evlist *evlist) |
c2a70653 | 674 | { |
0c21f736 | 675 | struct perf_evsel *first = perf_evlist__first(evlist); |
c2a70653 ACM |
676 | return first->attr.sample_type; |
677 | } | |
678 | ||
9ede473c JO |
679 | bool perf_evlist__valid_read_format(struct perf_evlist *evlist) |
680 | { | |
681 | struct perf_evsel *first = perf_evlist__first(evlist), *pos = first; | |
682 | u64 read_format = first->attr.read_format; | |
683 | u64 sample_type = first->attr.sample_type; | |
684 | ||
685 | list_for_each_entry_continue(pos, &evlist->entries, node) { | |
686 | if (read_format != pos->attr.read_format) | |
687 | return false; | |
688 | } | |
689 | ||
690 | /* PERF_SAMPLE_READ imples PERF_FORMAT_ID. */ | |
691 | if ((sample_type & PERF_SAMPLE_READ) && | |
692 | !(read_format & PERF_FORMAT_ID)) { | |
693 | return false; | |
694 | } | |
695 | ||
696 | return true; | |
697 | } | |
698 | ||
699 | u64 perf_evlist__read_format(struct perf_evlist *evlist) | |
700 | { | |
701 | struct perf_evsel *first = perf_evlist__first(evlist); | |
702 | return first->attr.read_format; | |
703 | } | |
704 | ||
0c21f736 | 705 | u16 perf_evlist__id_hdr_size(struct perf_evlist *evlist) |
81e36bff | 706 | { |
0c21f736 | 707 | struct perf_evsel *first = perf_evlist__first(evlist); |
81e36bff ACM |
708 | struct perf_sample *data; |
709 | u64 sample_type; | |
710 | u16 size = 0; | |
711 | ||
81e36bff ACM |
712 | if (!first->attr.sample_id_all) |
713 | goto out; | |
714 | ||
715 | sample_type = first->attr.sample_type; | |
716 | ||
717 | if (sample_type & PERF_SAMPLE_TID) | |
718 | size += sizeof(data->tid) * 2; | |
719 | ||
720 | if (sample_type & PERF_SAMPLE_TIME) | |
721 | size += sizeof(data->time); | |
722 | ||
723 | if (sample_type & PERF_SAMPLE_ID) | |
724 | size += sizeof(data->id); | |
725 | ||
726 | if (sample_type & PERF_SAMPLE_STREAM_ID) | |
727 | size += sizeof(data->stream_id); | |
728 | ||
729 | if (sample_type & PERF_SAMPLE_CPU) | |
730 | size += sizeof(data->cpu) * 2; | |
731 | out: | |
732 | return size; | |
733 | } | |
734 | ||
0c21f736 | 735 | bool perf_evlist__valid_sample_id_all(struct perf_evlist *evlist) |
74429964 | 736 | { |
0c21f736 | 737 | struct perf_evsel *first = perf_evlist__first(evlist), *pos = first; |
c2a70653 ACM |
738 | |
739 | list_for_each_entry_continue(pos, &evlist->entries, node) { | |
740 | if (first->attr.sample_id_all != pos->attr.sample_id_all) | |
741 | return false; | |
74429964 FW |
742 | } |
743 | ||
c2a70653 ACM |
744 | return true; |
745 | } | |
746 | ||
0c21f736 | 747 | bool perf_evlist__sample_id_all(struct perf_evlist *evlist) |
c2a70653 | 748 | { |
0c21f736 | 749 | struct perf_evsel *first = perf_evlist__first(evlist); |
c2a70653 | 750 | return first->attr.sample_id_all; |
74429964 | 751 | } |
81cce8de ACM |
752 | |
753 | void perf_evlist__set_selected(struct perf_evlist *evlist, | |
754 | struct perf_evsel *evsel) | |
755 | { | |
756 | evlist->selected = evsel; | |
757 | } | |
727ab04e | 758 | |
a74b4b66 NK |
759 | void perf_evlist__close(struct perf_evlist *evlist) |
760 | { | |
761 | struct perf_evsel *evsel; | |
762 | int ncpus = cpu_map__nr(evlist->cpus); | |
763 | int nthreads = thread_map__nr(evlist->threads); | |
764 | ||
765 | list_for_each_entry_reverse(evsel, &evlist->entries, node) | |
766 | perf_evsel__close(evsel, ncpus, nthreads); | |
767 | } | |
768 | ||
6a4bb04c | 769 | int perf_evlist__open(struct perf_evlist *evlist) |
727ab04e | 770 | { |
6a4bb04c | 771 | struct perf_evsel *evsel; |
a74b4b66 | 772 | int err; |
727ab04e | 773 | |
727ab04e | 774 | list_for_each_entry(evsel, &evlist->entries, node) { |
6a4bb04c | 775 | err = perf_evsel__open(evsel, evlist->cpus, evlist->threads); |
727ab04e ACM |
776 | if (err < 0) |
777 | goto out_err; | |
778 | } | |
779 | ||
780 | return 0; | |
781 | out_err: | |
a74b4b66 | 782 | perf_evlist__close(evlist); |
41c21a68 | 783 | errno = -err; |
727ab04e ACM |
784 | return err; |
785 | } | |
35b9d88e ACM |
786 | |
787 | int perf_evlist__prepare_workload(struct perf_evlist *evlist, | |
6ef73ec4 | 788 | struct perf_target *target, |
55e162ea NK |
789 | const char *argv[], bool pipe_output, |
790 | bool want_signal) | |
35b9d88e ACM |
791 | { |
792 | int child_ready_pipe[2], go_pipe[2]; | |
793 | char bf; | |
794 | ||
795 | if (pipe(child_ready_pipe) < 0) { | |
796 | perror("failed to create 'ready' pipe"); | |
797 | return -1; | |
798 | } | |
799 | ||
800 | if (pipe(go_pipe) < 0) { | |
801 | perror("failed to create 'go' pipe"); | |
802 | goto out_close_ready_pipe; | |
803 | } | |
804 | ||
805 | evlist->workload.pid = fork(); | |
806 | if (evlist->workload.pid < 0) { | |
807 | perror("failed to fork"); | |
808 | goto out_close_pipes; | |
809 | } | |
810 | ||
811 | if (!evlist->workload.pid) { | |
119fa3c9 | 812 | if (pipe_output) |
35b9d88e ACM |
813 | dup2(2, 1); |
814 | ||
0817df08 DA |
815 | signal(SIGTERM, SIG_DFL); |
816 | ||
35b9d88e ACM |
817 | close(child_ready_pipe[0]); |
818 | close(go_pipe[1]); | |
819 | fcntl(go_pipe[0], F_SETFD, FD_CLOEXEC); | |
820 | ||
821 | /* | |
822 | * Do a dummy execvp to get the PLT entry resolved, | |
823 | * so we avoid the resolver overhead on the real | |
824 | * execvp call. | |
825 | */ | |
826 | execvp("", (char **)argv); | |
827 | ||
828 | /* | |
829 | * Tell the parent we're ready to go | |
830 | */ | |
831 | close(child_ready_pipe[1]); | |
832 | ||
833 | /* | |
834 | * Wait until the parent tells us to go. | |
835 | */ | |
836 | if (read(go_pipe[0], &bf, 1) == -1) | |
837 | perror("unable to read pipe"); | |
838 | ||
839 | execvp(argv[0], (char **)argv); | |
840 | ||
841 | perror(argv[0]); | |
55e162ea NK |
842 | if (want_signal) |
843 | kill(getppid(), SIGUSR1); | |
35b9d88e ACM |
844 | exit(-1); |
845 | } | |
846 | ||
6ef73ec4 | 847 | if (perf_target__none(target)) |
35b9d88e ACM |
848 | evlist->threads->map[0] = evlist->workload.pid; |
849 | ||
850 | close(child_ready_pipe[1]); | |
851 | close(go_pipe[0]); | |
852 | /* | |
853 | * wait for child to settle | |
854 | */ | |
855 | if (read(child_ready_pipe[0], &bf, 1) == -1) { | |
856 | perror("unable to read pipe"); | |
857 | goto out_close_pipes; | |
858 | } | |
859 | ||
bcf3145f | 860 | fcntl(go_pipe[1], F_SETFD, FD_CLOEXEC); |
35b9d88e ACM |
861 | evlist->workload.cork_fd = go_pipe[1]; |
862 | close(child_ready_pipe[0]); | |
863 | return 0; | |
864 | ||
865 | out_close_pipes: | |
866 | close(go_pipe[0]); | |
867 | close(go_pipe[1]); | |
868 | out_close_ready_pipe: | |
869 | close(child_ready_pipe[0]); | |
870 | close(child_ready_pipe[1]); | |
871 | return -1; | |
872 | } | |
873 | ||
874 | int perf_evlist__start_workload(struct perf_evlist *evlist) | |
875 | { | |
876 | if (evlist->workload.cork_fd > 0) { | |
b3824404 | 877 | char bf = 0; |
bcf3145f | 878 | int ret; |
35b9d88e ACM |
879 | /* |
880 | * Remove the cork, let it rip! | |
881 | */ | |
bcf3145f NK |
882 | ret = write(evlist->workload.cork_fd, &bf, 1); |
883 | if (ret < 0) | |
884 | perror("enable to write to pipe"); | |
885 | ||
886 | close(evlist->workload.cork_fd); | |
887 | return ret; | |
35b9d88e ACM |
888 | } |
889 | ||
890 | return 0; | |
891 | } | |
cb0b29e0 | 892 | |
a3f698fe | 893 | int perf_evlist__parse_sample(struct perf_evlist *evlist, union perf_event *event, |
0807d2d8 | 894 | struct perf_sample *sample) |
cb0b29e0 | 895 | { |
0c21f736 | 896 | struct perf_evsel *evsel = perf_evlist__first(evlist); |
0807d2d8 | 897 | return perf_evsel__parse_sample(evsel, event, sample); |
cb0b29e0 | 898 | } |
78f067b3 ACM |
899 | |
900 | size_t perf_evlist__fprintf(struct perf_evlist *evlist, FILE *fp) | |
901 | { | |
902 | struct perf_evsel *evsel; | |
903 | size_t printed = 0; | |
904 | ||
905 | list_for_each_entry(evsel, &evlist->entries, node) { | |
906 | printed += fprintf(fp, "%s%s", evsel->idx ? ", " : "", | |
907 | perf_evsel__name(evsel)); | |
908 | } | |
909 | ||
910 | return printed + fprintf(fp, "\n");; | |
911 | } |