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