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Commit | Line | Data |
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f8a95309 ACM |
1 | /* |
2 | * Copyright (C) 2011, Red Hat Inc, Arnaldo Carvalho de Melo <acme@redhat.com> | |
3 | * | |
4 | * Parts came from builtin-{top,stat,record}.c, see those files for further | |
5 | * copyright notes. | |
6 | * | |
7 | * Released under the GPL v2. (and only v2, not any later version) | |
8 | */ | |
a8c9ae18 ACM |
9 | #include "util.h" |
10 | #include "debugfs.h" | |
5c581041 | 11 | #include <poll.h> |
f8a95309 ACM |
12 | #include "cpumap.h" |
13 | #include "thread_map.h" | |
361c99a6 ACM |
14 | #include "evlist.h" |
15 | #include "evsel.h" | |
35b9d88e | 16 | #include <unistd.h> |
361c99a6 | 17 | |
50d08e47 ACM |
18 | #include "parse-events.h" |
19 | ||
f8a95309 ACM |
20 | #include <sys/mman.h> |
21 | ||
70db7533 ACM |
22 | #include <linux/bitops.h> |
23 | #include <linux/hash.h> | |
24 | ||
f8a95309 | 25 | #define FD(e, x, y) (*(int *)xyarray__entry(e->fd, x, y)) |
a91e5431 | 26 | #define SID(e, x, y) xyarray__entry(e->sample_id, x, y) |
f8a95309 | 27 | |
7e2ed097 ACM |
28 | void perf_evlist__init(struct perf_evlist *evlist, struct cpu_map *cpus, |
29 | struct thread_map *threads) | |
ef1d1af2 ACM |
30 | { |
31 | int i; | |
32 | ||
33 | for (i = 0; i < PERF_EVLIST__HLIST_SIZE; ++i) | |
34 | INIT_HLIST_HEAD(&evlist->heads[i]); | |
35 | INIT_LIST_HEAD(&evlist->entries); | |
7e2ed097 | 36 | perf_evlist__set_maps(evlist, cpus, threads); |
35b9d88e | 37 | evlist->workload.pid = -1; |
ef1d1af2 ACM |
38 | } |
39 | ||
7e2ed097 ACM |
40 | struct perf_evlist *perf_evlist__new(struct cpu_map *cpus, |
41 | struct thread_map *threads) | |
361c99a6 ACM |
42 | { |
43 | struct perf_evlist *evlist = zalloc(sizeof(*evlist)); | |
44 | ||
ef1d1af2 | 45 | if (evlist != NULL) |
7e2ed097 | 46 | perf_evlist__init(evlist, cpus, threads); |
361c99a6 ACM |
47 | |
48 | return evlist; | |
49 | } | |
50 | ||
0f82ebc4 ACM |
51 | void perf_evlist__config_attrs(struct perf_evlist *evlist, |
52 | struct perf_record_opts *opts) | |
53 | { | |
54 | struct perf_evsel *evsel; | |
55 | ||
56 | if (evlist->cpus->map[0] < 0) | |
57 | opts->no_inherit = true; | |
58 | ||
59 | list_for_each_entry(evsel, &evlist->entries, node) { | |
60 | perf_evsel__config(evsel, opts); | |
61 | ||
62 | if (evlist->nr_entries > 1) | |
63 | evsel->attr.sample_type |= PERF_SAMPLE_ID; | |
64 | } | |
65 | } | |
66 | ||
361c99a6 ACM |
67 | static void perf_evlist__purge(struct perf_evlist *evlist) |
68 | { | |
69 | struct perf_evsel *pos, *n; | |
70 | ||
71 | list_for_each_entry_safe(pos, n, &evlist->entries, node) { | |
72 | list_del_init(&pos->node); | |
73 | perf_evsel__delete(pos); | |
74 | } | |
75 | ||
76 | evlist->nr_entries = 0; | |
77 | } | |
78 | ||
ef1d1af2 | 79 | void perf_evlist__exit(struct perf_evlist *evlist) |
361c99a6 | 80 | { |
70db7533 | 81 | free(evlist->mmap); |
5c581041 | 82 | free(evlist->pollfd); |
ef1d1af2 ACM |
83 | evlist->mmap = NULL; |
84 | evlist->pollfd = NULL; | |
85 | } | |
86 | ||
87 | void perf_evlist__delete(struct perf_evlist *evlist) | |
88 | { | |
89 | perf_evlist__purge(evlist); | |
90 | perf_evlist__exit(evlist); | |
361c99a6 ACM |
91 | free(evlist); |
92 | } | |
93 | ||
94 | void perf_evlist__add(struct perf_evlist *evlist, struct perf_evsel *entry) | |
95 | { | |
96 | list_add_tail(&entry->node, &evlist->entries); | |
97 | ++evlist->nr_entries; | |
98 | } | |
99 | ||
50d08e47 ACM |
100 | static void perf_evlist__splice_list_tail(struct perf_evlist *evlist, |
101 | struct list_head *list, | |
102 | int nr_entries) | |
103 | { | |
104 | list_splice_tail(list, &evlist->entries); | |
105 | evlist->nr_entries += nr_entries; | |
106 | } | |
107 | ||
361c99a6 ACM |
108 | int perf_evlist__add_default(struct perf_evlist *evlist) |
109 | { | |
110 | struct perf_event_attr attr = { | |
111 | .type = PERF_TYPE_HARDWARE, | |
112 | .config = PERF_COUNT_HW_CPU_CYCLES, | |
113 | }; | |
114 | struct perf_evsel *evsel = perf_evsel__new(&attr, 0); | |
115 | ||
116 | if (evsel == NULL) | |
cc2d86b0 SE |
117 | goto error; |
118 | ||
119 | /* use strdup() because free(evsel) assumes name is allocated */ | |
120 | evsel->name = strdup("cycles"); | |
121 | if (!evsel->name) | |
122 | goto error_free; | |
361c99a6 ACM |
123 | |
124 | perf_evlist__add(evlist, evsel); | |
125 | return 0; | |
cc2d86b0 SE |
126 | error_free: |
127 | perf_evsel__delete(evsel); | |
128 | error: | |
129 | return -ENOMEM; | |
361c99a6 | 130 | } |
5c581041 | 131 | |
50d08e47 ACM |
132 | int perf_evlist__add_attrs(struct perf_evlist *evlist, |
133 | struct perf_event_attr *attrs, size_t nr_attrs) | |
134 | { | |
135 | struct perf_evsel *evsel, *n; | |
136 | LIST_HEAD(head); | |
137 | size_t i; | |
138 | ||
139 | for (i = 0; i < nr_attrs; i++) { | |
140 | evsel = perf_evsel__new(attrs + i, evlist->nr_entries + i); | |
141 | if (evsel == NULL) | |
142 | goto out_delete_partial_list; | |
143 | list_add_tail(&evsel->node, &head); | |
144 | } | |
145 | ||
146 | perf_evlist__splice_list_tail(evlist, &head, nr_attrs); | |
147 | ||
148 | return 0; | |
149 | ||
150 | out_delete_partial_list: | |
151 | list_for_each_entry_safe(evsel, n, &head, node) | |
152 | perf_evsel__delete(evsel); | |
153 | return -1; | |
154 | } | |
155 | ||
a8c9ae18 ACM |
156 | static int trace_event__id(const char *evname) |
157 | { | |
158 | char *filename, *colon; | |
159 | int err = -1, fd; | |
160 | ||
161 | if (asprintf(&filename, "%s/%s/id", tracing_events_path, evname) < 0) | |
162 | return -1; | |
163 | ||
164 | colon = strrchr(filename, ':'); | |
165 | if (colon != NULL) | |
166 | *colon = '/'; | |
167 | ||
168 | fd = open(filename, O_RDONLY); | |
169 | if (fd >= 0) { | |
170 | char id[16]; | |
171 | if (read(fd, id, sizeof(id)) > 0) | |
172 | err = atoi(id); | |
173 | close(fd); | |
174 | } | |
175 | ||
176 | free(filename); | |
177 | return err; | |
178 | } | |
179 | ||
180 | int perf_evlist__add_tracepoints(struct perf_evlist *evlist, | |
181 | const char *tracepoints[], | |
182 | size_t nr_tracepoints) | |
183 | { | |
184 | int err; | |
185 | size_t i; | |
186 | struct perf_event_attr *attrs = zalloc(nr_tracepoints * sizeof(*attrs)); | |
187 | ||
188 | if (attrs == NULL) | |
189 | return -1; | |
190 | ||
191 | for (i = 0; i < nr_tracepoints; i++) { | |
192 | err = trace_event__id(tracepoints[i]); | |
193 | ||
194 | if (err < 0) | |
195 | goto out_free_attrs; | |
196 | ||
197 | attrs[i].type = PERF_TYPE_TRACEPOINT; | |
198 | attrs[i].config = err; | |
199 | attrs[i].sample_type = (PERF_SAMPLE_RAW | PERF_SAMPLE_TIME | | |
200 | PERF_SAMPLE_CPU); | |
201 | attrs[i].sample_period = 1; | |
202 | } | |
203 | ||
204 | err = perf_evlist__add_attrs(evlist, attrs, nr_tracepoints); | |
205 | out_free_attrs: | |
206 | free(attrs); | |
207 | return err; | |
208 | } | |
209 | ||
4152ab37 ACM |
210 | void perf_evlist__disable(struct perf_evlist *evlist) |
211 | { | |
212 | int cpu, thread; | |
213 | struct perf_evsel *pos; | |
214 | ||
215 | for (cpu = 0; cpu < evlist->cpus->nr; cpu++) { | |
216 | list_for_each_entry(pos, &evlist->entries, node) { | |
217 | for (thread = 0; thread < evlist->threads->nr; thread++) | |
218 | ioctl(FD(pos, cpu, thread), PERF_EVENT_IOC_DISABLE); | |
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; | |
227 | ||
228 | for (cpu = 0; cpu < evlist->cpus->nr; cpu++) { | |
229 | list_for_each_entry(pos, &evlist->entries, node) { | |
230 | for (thread = 0; thread < evlist->threads->nr; thread++) | |
231 | ioctl(FD(pos, cpu, thread), PERF_EVENT_IOC_ENABLE); | |
232 | } | |
233 | } | |
234 | } | |
235 | ||
7e2ed097 | 236 | int perf_evlist__alloc_pollfd(struct perf_evlist *evlist) |
5c581041 | 237 | { |
7e2ed097 | 238 | int nfds = evlist->cpus->nr * evlist->threads->nr * evlist->nr_entries; |
5c581041 ACM |
239 | evlist->pollfd = malloc(sizeof(struct pollfd) * nfds); |
240 | return evlist->pollfd != NULL ? 0 : -ENOMEM; | |
241 | } | |
70082dd9 ACM |
242 | |
243 | void perf_evlist__add_pollfd(struct perf_evlist *evlist, int fd) | |
244 | { | |
245 | fcntl(fd, F_SETFL, O_NONBLOCK); | |
246 | evlist->pollfd[evlist->nr_fds].fd = fd; | |
247 | evlist->pollfd[evlist->nr_fds].events = POLLIN; | |
248 | evlist->nr_fds++; | |
249 | } | |
70db7533 | 250 | |
a91e5431 ACM |
251 | static void perf_evlist__id_hash(struct perf_evlist *evlist, |
252 | struct perf_evsel *evsel, | |
253 | int cpu, int thread, u64 id) | |
3d3b5e95 ACM |
254 | { |
255 | int hash; | |
256 | struct perf_sample_id *sid = SID(evsel, cpu, thread); | |
257 | ||
258 | sid->id = id; | |
259 | sid->evsel = evsel; | |
260 | hash = hash_64(sid->id, PERF_EVLIST__HLIST_BITS); | |
261 | hlist_add_head(&sid->node, &evlist->heads[hash]); | |
262 | } | |
263 | ||
a91e5431 ACM |
264 | void perf_evlist__id_add(struct perf_evlist *evlist, struct perf_evsel *evsel, |
265 | int cpu, int thread, u64 id) | |
266 | { | |
267 | perf_evlist__id_hash(evlist, evsel, cpu, thread, id); | |
268 | evsel->id[evsel->ids++] = id; | |
269 | } | |
270 | ||
271 | static int perf_evlist__id_add_fd(struct perf_evlist *evlist, | |
272 | struct perf_evsel *evsel, | |
273 | int cpu, int thread, int fd) | |
f8a95309 | 274 | { |
f8a95309 | 275 | u64 read_data[4] = { 0, }; |
3d3b5e95 | 276 | int id_idx = 1; /* The first entry is the counter value */ |
f8a95309 ACM |
277 | |
278 | if (!(evsel->attr.read_format & PERF_FORMAT_ID) || | |
279 | read(fd, &read_data, sizeof(read_data)) == -1) | |
280 | return -1; | |
281 | ||
282 | if (evsel->attr.read_format & PERF_FORMAT_TOTAL_TIME_ENABLED) | |
283 | ++id_idx; | |
284 | if (evsel->attr.read_format & PERF_FORMAT_TOTAL_TIME_RUNNING) | |
285 | ++id_idx; | |
286 | ||
a91e5431 | 287 | perf_evlist__id_add(evlist, evsel, cpu, thread, read_data[id_idx]); |
f8a95309 ACM |
288 | return 0; |
289 | } | |
290 | ||
70db7533 ACM |
291 | struct perf_evsel *perf_evlist__id2evsel(struct perf_evlist *evlist, u64 id) |
292 | { | |
293 | struct hlist_head *head; | |
294 | struct hlist_node *pos; | |
295 | struct perf_sample_id *sid; | |
296 | int hash; | |
297 | ||
298 | if (evlist->nr_entries == 1) | |
299 | return list_entry(evlist->entries.next, struct perf_evsel, node); | |
300 | ||
301 | hash = hash_64(id, PERF_EVLIST__HLIST_BITS); | |
302 | head = &evlist->heads[hash]; | |
303 | ||
304 | hlist_for_each_entry(sid, pos, head, node) | |
305 | if (sid->id == id) | |
306 | return sid->evsel; | |
307 | return NULL; | |
308 | } | |
04391deb | 309 | |
aece948f | 310 | union perf_event *perf_evlist__mmap_read(struct perf_evlist *evlist, int idx) |
04391deb ACM |
311 | { |
312 | /* XXX Move this to perf.c, making it generally available */ | |
313 | unsigned int page_size = sysconf(_SC_PAGE_SIZE); | |
aece948f | 314 | struct perf_mmap *md = &evlist->mmap[idx]; |
04391deb ACM |
315 | unsigned int head = perf_mmap__read_head(md); |
316 | unsigned int old = md->prev; | |
317 | unsigned char *data = md->base + page_size; | |
8115d60c | 318 | union perf_event *event = NULL; |
04391deb | 319 | |
7bb41152 | 320 | if (evlist->overwrite) { |
04391deb | 321 | /* |
7bb41152 ACM |
322 | * If we're further behind than half the buffer, there's a chance |
323 | * the writer will bite our tail and mess up the samples under us. | |
324 | * | |
325 | * If we somehow ended up ahead of the head, we got messed up. | |
326 | * | |
327 | * In either case, truncate and restart at head. | |
04391deb | 328 | */ |
7bb41152 ACM |
329 | int diff = head - old; |
330 | if (diff > md->mask / 2 || diff < 0) { | |
331 | fprintf(stderr, "WARNING: failed to keep up with mmap data.\n"); | |
332 | ||
333 | /* | |
334 | * head points to a known good entry, start there. | |
335 | */ | |
336 | old = head; | |
337 | } | |
04391deb ACM |
338 | } |
339 | ||
340 | if (old != head) { | |
341 | size_t size; | |
342 | ||
8115d60c | 343 | event = (union perf_event *)&data[old & md->mask]; |
04391deb ACM |
344 | size = event->header.size; |
345 | ||
346 | /* | |
347 | * Event straddles the mmap boundary -- header should always | |
348 | * be inside due to u64 alignment of output. | |
349 | */ | |
350 | if ((old & md->mask) + size != ((old + size) & md->mask)) { | |
351 | unsigned int offset = old; | |
352 | unsigned int len = min(sizeof(*event), size), cpy; | |
353 | void *dst = &evlist->event_copy; | |
354 | ||
355 | do { | |
356 | cpy = min(md->mask + 1 - (offset & md->mask), len); | |
357 | memcpy(dst, &data[offset & md->mask], cpy); | |
358 | offset += cpy; | |
359 | dst += cpy; | |
360 | len -= cpy; | |
361 | } while (len); | |
362 | ||
363 | event = &evlist->event_copy; | |
364 | } | |
365 | ||
366 | old += size; | |
367 | } | |
368 | ||
369 | md->prev = old; | |
7bb41152 ACM |
370 | |
371 | if (!evlist->overwrite) | |
372 | perf_mmap__write_tail(md, old); | |
373 | ||
04391deb ACM |
374 | return event; |
375 | } | |
f8a95309 | 376 | |
7e2ed097 | 377 | void perf_evlist__munmap(struct perf_evlist *evlist) |
f8a95309 | 378 | { |
aece948f | 379 | int i; |
f8a95309 | 380 | |
aece948f ACM |
381 | for (i = 0; i < evlist->nr_mmaps; i++) { |
382 | if (evlist->mmap[i].base != NULL) { | |
383 | munmap(evlist->mmap[i].base, evlist->mmap_len); | |
384 | evlist->mmap[i].base = NULL; | |
f8a95309 ACM |
385 | } |
386 | } | |
aece948f ACM |
387 | |
388 | free(evlist->mmap); | |
389 | evlist->mmap = NULL; | |
f8a95309 ACM |
390 | } |
391 | ||
7e2ed097 | 392 | int perf_evlist__alloc_mmap(struct perf_evlist *evlist) |
f8a95309 | 393 | { |
aece948f ACM |
394 | evlist->nr_mmaps = evlist->cpus->nr; |
395 | if (evlist->cpus->map[0] == -1) | |
396 | evlist->nr_mmaps = evlist->threads->nr; | |
397 | evlist->mmap = zalloc(evlist->nr_mmaps * sizeof(struct perf_mmap)); | |
f8a95309 ACM |
398 | return evlist->mmap != NULL ? 0 : -ENOMEM; |
399 | } | |
400 | ||
bccdaba0 | 401 | static int __perf_evlist__mmap(struct perf_evlist *evlist, |
aece948f | 402 | int idx, int prot, int mask, int fd) |
f8a95309 | 403 | { |
aece948f ACM |
404 | evlist->mmap[idx].prev = 0; |
405 | evlist->mmap[idx].mask = mask; | |
406 | evlist->mmap[idx].base = mmap(NULL, evlist->mmap_len, prot, | |
f8a95309 | 407 | MAP_SHARED, fd, 0); |
bccdaba0 | 408 | if (evlist->mmap[idx].base == MAP_FAILED) |
f8a95309 ACM |
409 | return -1; |
410 | ||
411 | perf_evlist__add_pollfd(evlist, fd); | |
412 | return 0; | |
413 | } | |
414 | ||
aece948f ACM |
415 | static int perf_evlist__mmap_per_cpu(struct perf_evlist *evlist, int prot, int mask) |
416 | { | |
417 | struct perf_evsel *evsel; | |
418 | int cpu, thread; | |
419 | ||
420 | for (cpu = 0; cpu < evlist->cpus->nr; cpu++) { | |
421 | int output = -1; | |
422 | ||
423 | for (thread = 0; thread < evlist->threads->nr; thread++) { | |
424 | list_for_each_entry(evsel, &evlist->entries, node) { | |
425 | int fd = FD(evsel, cpu, thread); | |
426 | ||
427 | if (output == -1) { | |
428 | output = fd; | |
bccdaba0 | 429 | if (__perf_evlist__mmap(evlist, cpu, |
aece948f ACM |
430 | prot, mask, output) < 0) |
431 | goto out_unmap; | |
432 | } else { | |
433 | if (ioctl(fd, PERF_EVENT_IOC_SET_OUTPUT, output) != 0) | |
434 | goto out_unmap; | |
435 | } | |
436 | ||
437 | if ((evsel->attr.read_format & PERF_FORMAT_ID) && | |
438 | perf_evlist__id_add_fd(evlist, evsel, cpu, thread, fd) < 0) | |
439 | goto out_unmap; | |
440 | } | |
441 | } | |
442 | } | |
443 | ||
444 | return 0; | |
445 | ||
446 | out_unmap: | |
447 | for (cpu = 0; cpu < evlist->cpus->nr; cpu++) { | |
448 | if (evlist->mmap[cpu].base != NULL) { | |
449 | munmap(evlist->mmap[cpu].base, evlist->mmap_len); | |
450 | evlist->mmap[cpu].base = NULL; | |
451 | } | |
452 | } | |
453 | return -1; | |
454 | } | |
455 | ||
456 | static int perf_evlist__mmap_per_thread(struct perf_evlist *evlist, int prot, int mask) | |
457 | { | |
458 | struct perf_evsel *evsel; | |
459 | int thread; | |
460 | ||
461 | for (thread = 0; thread < evlist->threads->nr; thread++) { | |
462 | int output = -1; | |
463 | ||
464 | list_for_each_entry(evsel, &evlist->entries, node) { | |
465 | int fd = FD(evsel, 0, thread); | |
466 | ||
467 | if (output == -1) { | |
468 | output = fd; | |
bccdaba0 | 469 | if (__perf_evlist__mmap(evlist, thread, |
aece948f ACM |
470 | prot, mask, output) < 0) |
471 | goto out_unmap; | |
472 | } else { | |
473 | if (ioctl(fd, PERF_EVENT_IOC_SET_OUTPUT, output) != 0) | |
474 | goto out_unmap; | |
475 | } | |
476 | ||
477 | if ((evsel->attr.read_format & PERF_FORMAT_ID) && | |
478 | perf_evlist__id_add_fd(evlist, evsel, 0, thread, fd) < 0) | |
479 | goto out_unmap; | |
480 | } | |
481 | } | |
482 | ||
483 | return 0; | |
484 | ||
485 | out_unmap: | |
486 | for (thread = 0; thread < evlist->threads->nr; thread++) { | |
487 | if (evlist->mmap[thread].base != NULL) { | |
488 | munmap(evlist->mmap[thread].base, evlist->mmap_len); | |
489 | evlist->mmap[thread].base = NULL; | |
490 | } | |
491 | } | |
492 | return -1; | |
493 | } | |
494 | ||
f8a95309 ACM |
495 | /** perf_evlist__mmap - Create per cpu maps to receive events |
496 | * | |
497 | * @evlist - list of events | |
f8a95309 ACM |
498 | * @pages - map length in pages |
499 | * @overwrite - overwrite older events? | |
500 | * | |
501 | * If overwrite is false the user needs to signal event consuption using: | |
502 | * | |
503 | * struct perf_mmap *m = &evlist->mmap[cpu]; | |
504 | * unsigned int head = perf_mmap__read_head(m); | |
505 | * | |
506 | * perf_mmap__write_tail(m, head) | |
7e2ed097 ACM |
507 | * |
508 | * Using perf_evlist__read_on_cpu does this automatically. | |
f8a95309 | 509 | */ |
7e2ed097 | 510 | int perf_evlist__mmap(struct perf_evlist *evlist, int pages, bool overwrite) |
f8a95309 ACM |
511 | { |
512 | unsigned int page_size = sysconf(_SC_PAGE_SIZE); | |
aece948f ACM |
513 | int mask = pages * page_size - 1; |
514 | struct perf_evsel *evsel; | |
7e2ed097 ACM |
515 | const struct cpu_map *cpus = evlist->cpus; |
516 | const struct thread_map *threads = evlist->threads; | |
aece948f | 517 | int prot = PROT_READ | (overwrite ? 0 : PROT_WRITE); |
f8a95309 | 518 | |
7e2ed097 | 519 | if (evlist->mmap == NULL && perf_evlist__alloc_mmap(evlist) < 0) |
f8a95309 ACM |
520 | return -ENOMEM; |
521 | ||
7e2ed097 | 522 | if (evlist->pollfd == NULL && perf_evlist__alloc_pollfd(evlist) < 0) |
f8a95309 ACM |
523 | return -ENOMEM; |
524 | ||
525 | evlist->overwrite = overwrite; | |
526 | evlist->mmap_len = (pages + 1) * page_size; | |
f8a95309 ACM |
527 | |
528 | list_for_each_entry(evsel, &evlist->entries, node) { | |
529 | if ((evsel->attr.read_format & PERF_FORMAT_ID) && | |
a91e5431 | 530 | evsel->sample_id == NULL && |
f8a95309 ACM |
531 | perf_evsel__alloc_id(evsel, cpus->nr, threads->nr) < 0) |
532 | return -ENOMEM; | |
f8a95309 ACM |
533 | } |
534 | ||
aece948f ACM |
535 | if (evlist->cpus->map[0] == -1) |
536 | return perf_evlist__mmap_per_thread(evlist, prot, mask); | |
f8a95309 | 537 | |
aece948f | 538 | return perf_evlist__mmap_per_cpu(evlist, prot, mask); |
f8a95309 | 539 | } |
7e2ed097 ACM |
540 | |
541 | int perf_evlist__create_maps(struct perf_evlist *evlist, pid_t target_pid, | |
542 | pid_t target_tid, const char *cpu_list) | |
543 | { | |
544 | evlist->threads = thread_map__new(target_pid, target_tid); | |
545 | ||
546 | if (evlist->threads == NULL) | |
547 | return -1; | |
548 | ||
b9019418 | 549 | if (cpu_list == NULL && target_tid != -1) |
7e2ed097 ACM |
550 | evlist->cpus = cpu_map__dummy_new(); |
551 | else | |
552 | evlist->cpus = cpu_map__new(cpu_list); | |
553 | ||
554 | if (evlist->cpus == NULL) | |
555 | goto out_delete_threads; | |
556 | ||
557 | return 0; | |
558 | ||
559 | out_delete_threads: | |
560 | thread_map__delete(evlist->threads); | |
561 | return -1; | |
562 | } | |
563 | ||
564 | void perf_evlist__delete_maps(struct perf_evlist *evlist) | |
565 | { | |
566 | cpu_map__delete(evlist->cpus); | |
567 | thread_map__delete(evlist->threads); | |
568 | evlist->cpus = NULL; | |
569 | evlist->threads = NULL; | |
570 | } | |
0a102479 FW |
571 | |
572 | int perf_evlist__set_filters(struct perf_evlist *evlist) | |
573 | { | |
574 | const struct thread_map *threads = evlist->threads; | |
575 | const struct cpu_map *cpus = evlist->cpus; | |
576 | struct perf_evsel *evsel; | |
577 | char *filter; | |
578 | int thread; | |
579 | int cpu; | |
580 | int err; | |
581 | int fd; | |
582 | ||
583 | list_for_each_entry(evsel, &evlist->entries, node) { | |
584 | filter = evsel->filter; | |
585 | if (!filter) | |
586 | continue; | |
587 | for (cpu = 0; cpu < cpus->nr; cpu++) { | |
588 | for (thread = 0; thread < threads->nr; thread++) { | |
589 | fd = FD(evsel, cpu, thread); | |
590 | err = ioctl(fd, PERF_EVENT_IOC_SET_FILTER, filter); | |
591 | if (err) | |
592 | return err; | |
593 | } | |
594 | } | |
595 | } | |
596 | ||
597 | return 0; | |
598 | } | |
74429964 | 599 | |
c2a70653 | 600 | bool perf_evlist__valid_sample_type(const struct perf_evlist *evlist) |
74429964 | 601 | { |
c2a70653 ACM |
602 | struct perf_evsel *pos, *first; |
603 | ||
604 | pos = first = list_entry(evlist->entries.next, struct perf_evsel, node); | |
605 | ||
606 | list_for_each_entry_continue(pos, &evlist->entries, node) { | |
607 | if (first->attr.sample_type != pos->attr.sample_type) | |
608 | return false; | |
74429964 FW |
609 | } |
610 | ||
c2a70653 | 611 | return true; |
74429964 FW |
612 | } |
613 | ||
c2a70653 ACM |
614 | u64 perf_evlist__sample_type(const struct perf_evlist *evlist) |
615 | { | |
616 | struct perf_evsel *first; | |
617 | ||
618 | first = list_entry(evlist->entries.next, struct perf_evsel, node); | |
619 | return first->attr.sample_type; | |
620 | } | |
621 | ||
622 | bool perf_evlist__valid_sample_id_all(const struct perf_evlist *evlist) | |
74429964 | 623 | { |
c2a70653 ACM |
624 | struct perf_evsel *pos, *first; |
625 | ||
626 | pos = first = list_entry(evlist->entries.next, struct perf_evsel, node); | |
627 | ||
628 | list_for_each_entry_continue(pos, &evlist->entries, node) { | |
629 | if (first->attr.sample_id_all != pos->attr.sample_id_all) | |
630 | return false; | |
74429964 FW |
631 | } |
632 | ||
c2a70653 ACM |
633 | return true; |
634 | } | |
635 | ||
636 | bool perf_evlist__sample_id_all(const struct perf_evlist *evlist) | |
637 | { | |
638 | struct perf_evsel *first; | |
639 | ||
640 | first = list_entry(evlist->entries.next, struct perf_evsel, node); | |
641 | return first->attr.sample_id_all; | |
74429964 | 642 | } |
81cce8de ACM |
643 | |
644 | void perf_evlist__set_selected(struct perf_evlist *evlist, | |
645 | struct perf_evsel *evsel) | |
646 | { | |
647 | evlist->selected = evsel; | |
648 | } | |
727ab04e ACM |
649 | |
650 | int perf_evlist__open(struct perf_evlist *evlist, bool group) | |
651 | { | |
652 | struct perf_evsel *evsel, *first; | |
653 | int err, ncpus, nthreads; | |
654 | ||
655 | first = list_entry(evlist->entries.next, struct perf_evsel, node); | |
656 | ||
657 | list_for_each_entry(evsel, &evlist->entries, node) { | |
658 | struct xyarray *group_fd = NULL; | |
659 | ||
660 | if (group && evsel != first) | |
661 | group_fd = first->fd; | |
662 | ||
663 | err = perf_evsel__open(evsel, evlist->cpus, evlist->threads, | |
664 | group, group_fd); | |
665 | if (err < 0) | |
666 | goto out_err; | |
667 | } | |
668 | ||
669 | return 0; | |
670 | out_err: | |
671 | ncpus = evlist->cpus ? evlist->cpus->nr : 1; | |
672 | nthreads = evlist->threads ? evlist->threads->nr : 1; | |
673 | ||
674 | list_for_each_entry_reverse(evsel, &evlist->entries, node) | |
675 | perf_evsel__close(evsel, ncpus, nthreads); | |
676 | ||
677 | return err; | |
678 | } | |
35b9d88e ACM |
679 | |
680 | int perf_evlist__prepare_workload(struct perf_evlist *evlist, | |
681 | struct perf_record_opts *opts, | |
682 | const char *argv[]) | |
683 | { | |
684 | int child_ready_pipe[2], go_pipe[2]; | |
685 | char bf; | |
686 | ||
687 | if (pipe(child_ready_pipe) < 0) { | |
688 | perror("failed to create 'ready' pipe"); | |
689 | return -1; | |
690 | } | |
691 | ||
692 | if (pipe(go_pipe) < 0) { | |
693 | perror("failed to create 'go' pipe"); | |
694 | goto out_close_ready_pipe; | |
695 | } | |
696 | ||
697 | evlist->workload.pid = fork(); | |
698 | if (evlist->workload.pid < 0) { | |
699 | perror("failed to fork"); | |
700 | goto out_close_pipes; | |
701 | } | |
702 | ||
703 | if (!evlist->workload.pid) { | |
704 | if (opts->pipe_output) | |
705 | dup2(2, 1); | |
706 | ||
707 | close(child_ready_pipe[0]); | |
708 | close(go_pipe[1]); | |
709 | fcntl(go_pipe[0], F_SETFD, FD_CLOEXEC); | |
710 | ||
711 | /* | |
712 | * Do a dummy execvp to get the PLT entry resolved, | |
713 | * so we avoid the resolver overhead on the real | |
714 | * execvp call. | |
715 | */ | |
716 | execvp("", (char **)argv); | |
717 | ||
718 | /* | |
719 | * Tell the parent we're ready to go | |
720 | */ | |
721 | close(child_ready_pipe[1]); | |
722 | ||
723 | /* | |
724 | * Wait until the parent tells us to go. | |
725 | */ | |
726 | if (read(go_pipe[0], &bf, 1) == -1) | |
727 | perror("unable to read pipe"); | |
728 | ||
729 | execvp(argv[0], (char **)argv); | |
730 | ||
731 | perror(argv[0]); | |
732 | kill(getppid(), SIGUSR1); | |
733 | exit(-1); | |
734 | } | |
735 | ||
736 | if (!opts->system_wide && opts->target_tid == -1 && opts->target_pid == -1) | |
737 | evlist->threads->map[0] = evlist->workload.pid; | |
738 | ||
739 | close(child_ready_pipe[1]); | |
740 | close(go_pipe[0]); | |
741 | /* | |
742 | * wait for child to settle | |
743 | */ | |
744 | if (read(child_ready_pipe[0], &bf, 1) == -1) { | |
745 | perror("unable to read pipe"); | |
746 | goto out_close_pipes; | |
747 | } | |
748 | ||
749 | evlist->workload.cork_fd = go_pipe[1]; | |
750 | close(child_ready_pipe[0]); | |
751 | return 0; | |
752 | ||
753 | out_close_pipes: | |
754 | close(go_pipe[0]); | |
755 | close(go_pipe[1]); | |
756 | out_close_ready_pipe: | |
757 | close(child_ready_pipe[0]); | |
758 | close(child_ready_pipe[1]); | |
759 | return -1; | |
760 | } | |
761 | ||
762 | int perf_evlist__start_workload(struct perf_evlist *evlist) | |
763 | { | |
764 | if (evlist->workload.cork_fd > 0) { | |
765 | /* | |
766 | * Remove the cork, let it rip! | |
767 | */ | |
768 | return close(evlist->workload.cork_fd); | |
769 | } | |
770 | ||
771 | return 0; | |
772 | } |