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 | ||
0f82ebc4 ACM |
52 | void perf_evlist__config_attrs(struct perf_evlist *evlist, |
53 | struct perf_record_opts *opts) | |
54 | { | |
cac21425 | 55 | struct perf_evsel *evsel; |
0f82ebc4 ACM |
56 | |
57 | if (evlist->cpus->map[0] < 0) | |
58 | opts->no_inherit = true; | |
59 | ||
60 | list_for_each_entry(evsel, &evlist->entries, node) { | |
cac21425 | 61 | perf_evsel__config(evsel, opts); |
0f82ebc4 ACM |
62 | |
63 | if (evlist->nr_entries > 1) | |
7be5ebe8 | 64 | perf_evsel__set_sample_bit(evsel, ID); |
0f82ebc4 ACM |
65 | } |
66 | } | |
67 | ||
361c99a6 ACM |
68 | static void perf_evlist__purge(struct perf_evlist *evlist) |
69 | { | |
70 | struct perf_evsel *pos, *n; | |
71 | ||
72 | list_for_each_entry_safe(pos, n, &evlist->entries, node) { | |
73 | list_del_init(&pos->node); | |
74 | perf_evsel__delete(pos); | |
75 | } | |
76 | ||
77 | evlist->nr_entries = 0; | |
78 | } | |
79 | ||
ef1d1af2 | 80 | void perf_evlist__exit(struct perf_evlist *evlist) |
361c99a6 | 81 | { |
70db7533 | 82 | free(evlist->mmap); |
5c581041 | 83 | free(evlist->pollfd); |
ef1d1af2 ACM |
84 | evlist->mmap = NULL; |
85 | evlist->pollfd = NULL; | |
86 | } | |
87 | ||
88 | void perf_evlist__delete(struct perf_evlist *evlist) | |
89 | { | |
90 | perf_evlist__purge(evlist); | |
91 | perf_evlist__exit(evlist); | |
361c99a6 ACM |
92 | free(evlist); |
93 | } | |
94 | ||
95 | void perf_evlist__add(struct perf_evlist *evlist, struct perf_evsel *entry) | |
96 | { | |
97 | list_add_tail(&entry->node, &evlist->entries); | |
98 | ++evlist->nr_entries; | |
99 | } | |
100 | ||
0529bc1f JO |
101 | void perf_evlist__splice_list_tail(struct perf_evlist *evlist, |
102 | struct list_head *list, | |
103 | int nr_entries) | |
50d08e47 ACM |
104 | { |
105 | list_splice_tail(list, &evlist->entries); | |
106 | evlist->nr_entries += nr_entries; | |
107 | } | |
108 | ||
63dab225 ACM |
109 | void __perf_evlist__set_leader(struct list_head *list) |
110 | { | |
111 | struct perf_evsel *evsel, *leader; | |
112 | ||
113 | leader = list_entry(list->next, struct perf_evsel, node); | |
63dab225 ACM |
114 | |
115 | list_for_each_entry(evsel, list, node) { | |
116 | if (evsel != leader) | |
117 | evsel->leader = leader; | |
118 | } | |
119 | } | |
120 | ||
121 | void perf_evlist__set_leader(struct perf_evlist *evlist) | |
6a4bb04c JO |
122 | { |
123 | if (evlist->nr_entries) | |
63dab225 | 124 | __perf_evlist__set_leader(&evlist->entries); |
6a4bb04c JO |
125 | } |
126 | ||
361c99a6 ACM |
127 | int perf_evlist__add_default(struct perf_evlist *evlist) |
128 | { | |
129 | struct perf_event_attr attr = { | |
130 | .type = PERF_TYPE_HARDWARE, | |
131 | .config = PERF_COUNT_HW_CPU_CYCLES, | |
132 | }; | |
1aed2671 JR |
133 | struct perf_evsel *evsel; |
134 | ||
135 | event_attr_init(&attr); | |
361c99a6 | 136 | |
1aed2671 | 137 | evsel = perf_evsel__new(&attr, 0); |
361c99a6 | 138 | if (evsel == NULL) |
cc2d86b0 SE |
139 | goto error; |
140 | ||
141 | /* use strdup() because free(evsel) assumes name is allocated */ | |
142 | evsel->name = strdup("cycles"); | |
143 | if (!evsel->name) | |
144 | goto error_free; | |
361c99a6 ACM |
145 | |
146 | perf_evlist__add(evlist, evsel); | |
147 | return 0; | |
cc2d86b0 SE |
148 | error_free: |
149 | perf_evsel__delete(evsel); | |
150 | error: | |
151 | return -ENOMEM; | |
361c99a6 | 152 | } |
5c581041 | 153 | |
e60fc847 ACM |
154 | static int perf_evlist__add_attrs(struct perf_evlist *evlist, |
155 | struct perf_event_attr *attrs, size_t nr_attrs) | |
50d08e47 ACM |
156 | { |
157 | struct perf_evsel *evsel, *n; | |
158 | LIST_HEAD(head); | |
159 | size_t i; | |
160 | ||
161 | for (i = 0; i < nr_attrs; i++) { | |
162 | evsel = perf_evsel__new(attrs + i, evlist->nr_entries + i); | |
163 | if (evsel == NULL) | |
164 | goto out_delete_partial_list; | |
165 | list_add_tail(&evsel->node, &head); | |
166 | } | |
167 | ||
168 | perf_evlist__splice_list_tail(evlist, &head, nr_attrs); | |
169 | ||
170 | return 0; | |
171 | ||
172 | out_delete_partial_list: | |
173 | list_for_each_entry_safe(evsel, n, &head, node) | |
174 | perf_evsel__delete(evsel); | |
175 | return -1; | |
176 | } | |
177 | ||
79695e1b ACM |
178 | int __perf_evlist__add_default_attrs(struct perf_evlist *evlist, |
179 | struct perf_event_attr *attrs, size_t nr_attrs) | |
180 | { | |
181 | size_t i; | |
182 | ||
183 | for (i = 0; i < nr_attrs; i++) | |
184 | event_attr_init(attrs + i); | |
185 | ||
186 | return perf_evlist__add_attrs(evlist, attrs, nr_attrs); | |
187 | } | |
188 | ||
da378962 ACM |
189 | struct perf_evsel * |
190 | perf_evlist__find_tracepoint_by_id(struct perf_evlist *evlist, int id) | |
ee29be62 ACM |
191 | { |
192 | struct perf_evsel *evsel; | |
193 | ||
194 | list_for_each_entry(evsel, &evlist->entries, node) { | |
195 | if (evsel->attr.type == PERF_TYPE_TRACEPOINT && | |
196 | (int)evsel->attr.config == id) | |
197 | return evsel; | |
198 | } | |
199 | ||
200 | return NULL; | |
201 | } | |
202 | ||
39876e7d ACM |
203 | int perf_evlist__add_newtp(struct perf_evlist *evlist, |
204 | const char *sys, const char *name, void *handler) | |
205 | { | |
206 | struct perf_evsel *evsel; | |
207 | ||
208 | evsel = perf_evsel__newtp(sys, name, evlist->nr_entries); | |
209 | if (evsel == NULL) | |
210 | return -1; | |
211 | ||
212 | evsel->handler.func = handler; | |
213 | perf_evlist__add(evlist, evsel); | |
214 | return 0; | |
215 | } | |
216 | ||
4152ab37 ACM |
217 | void perf_evlist__disable(struct perf_evlist *evlist) |
218 | { | |
219 | int cpu, thread; | |
220 | struct perf_evsel *pos; | |
221 | ||
222 | for (cpu = 0; cpu < evlist->cpus->nr; cpu++) { | |
223 | list_for_each_entry(pos, &evlist->entries, node) { | |
823254ed | 224 | if (!perf_evsel__is_group_leader(pos)) |
3fe4430d | 225 | continue; |
4152ab37 | 226 | for (thread = 0; thread < evlist->threads->nr; thread++) |
55da8005 NK |
227 | ioctl(FD(pos, cpu, thread), |
228 | PERF_EVENT_IOC_DISABLE, 0); | |
4152ab37 ACM |
229 | } |
230 | } | |
231 | } | |
232 | ||
764e16a3 DA |
233 | void perf_evlist__enable(struct perf_evlist *evlist) |
234 | { | |
235 | int cpu, thread; | |
236 | struct perf_evsel *pos; | |
237 | ||
a14bb7a6 | 238 | for (cpu = 0; cpu < cpu_map__nr(evlist->cpus); cpu++) { |
764e16a3 | 239 | list_for_each_entry(pos, &evlist->entries, node) { |
823254ed | 240 | if (!perf_evsel__is_group_leader(pos)) |
3fe4430d | 241 | continue; |
764e16a3 | 242 | for (thread = 0; thread < evlist->threads->nr; thread++) |
55da8005 NK |
243 | ioctl(FD(pos, cpu, thread), |
244 | PERF_EVENT_IOC_ENABLE, 0); | |
764e16a3 DA |
245 | } |
246 | } | |
247 | } | |
248 | ||
806fb630 | 249 | static int perf_evlist__alloc_pollfd(struct perf_evlist *evlist) |
5c581041 | 250 | { |
a14bb7a6 | 251 | int nfds = cpu_map__nr(evlist->cpus) * evlist->threads->nr * evlist->nr_entries; |
5c581041 ACM |
252 | evlist->pollfd = malloc(sizeof(struct pollfd) * nfds); |
253 | return evlist->pollfd != NULL ? 0 : -ENOMEM; | |
254 | } | |
70082dd9 ACM |
255 | |
256 | void perf_evlist__add_pollfd(struct perf_evlist *evlist, int fd) | |
257 | { | |
258 | fcntl(fd, F_SETFL, O_NONBLOCK); | |
259 | evlist->pollfd[evlist->nr_fds].fd = fd; | |
260 | evlist->pollfd[evlist->nr_fds].events = POLLIN; | |
261 | evlist->nr_fds++; | |
262 | } | |
70db7533 | 263 | |
a91e5431 ACM |
264 | static void perf_evlist__id_hash(struct perf_evlist *evlist, |
265 | struct perf_evsel *evsel, | |
266 | int cpu, int thread, u64 id) | |
3d3b5e95 ACM |
267 | { |
268 | int hash; | |
269 | struct perf_sample_id *sid = SID(evsel, cpu, thread); | |
270 | ||
271 | sid->id = id; | |
272 | sid->evsel = evsel; | |
273 | hash = hash_64(sid->id, PERF_EVLIST__HLIST_BITS); | |
274 | hlist_add_head(&sid->node, &evlist->heads[hash]); | |
275 | } | |
276 | ||
a91e5431 ACM |
277 | void perf_evlist__id_add(struct perf_evlist *evlist, struct perf_evsel *evsel, |
278 | int cpu, int thread, u64 id) | |
279 | { | |
280 | perf_evlist__id_hash(evlist, evsel, cpu, thread, id); | |
281 | evsel->id[evsel->ids++] = id; | |
282 | } | |
283 | ||
284 | static int perf_evlist__id_add_fd(struct perf_evlist *evlist, | |
285 | struct perf_evsel *evsel, | |
286 | int cpu, int thread, int fd) | |
f8a95309 | 287 | { |
f8a95309 | 288 | u64 read_data[4] = { 0, }; |
3d3b5e95 | 289 | int id_idx = 1; /* The first entry is the counter value */ |
f8a95309 ACM |
290 | |
291 | if (!(evsel->attr.read_format & PERF_FORMAT_ID) || | |
292 | read(fd, &read_data, sizeof(read_data)) == -1) | |
293 | return -1; | |
294 | ||
295 | if (evsel->attr.read_format & PERF_FORMAT_TOTAL_TIME_ENABLED) | |
296 | ++id_idx; | |
297 | if (evsel->attr.read_format & PERF_FORMAT_TOTAL_TIME_RUNNING) | |
298 | ++id_idx; | |
299 | ||
a91e5431 | 300 | perf_evlist__id_add(evlist, evsel, cpu, thread, read_data[id_idx]); |
f8a95309 ACM |
301 | return 0; |
302 | } | |
303 | ||
70db7533 ACM |
304 | struct perf_evsel *perf_evlist__id2evsel(struct perf_evlist *evlist, u64 id) |
305 | { | |
306 | struct hlist_head *head; | |
307 | struct hlist_node *pos; | |
308 | struct perf_sample_id *sid; | |
309 | int hash; | |
310 | ||
311 | if (evlist->nr_entries == 1) | |
0c21f736 | 312 | return perf_evlist__first(evlist); |
70db7533 ACM |
313 | |
314 | hash = hash_64(id, PERF_EVLIST__HLIST_BITS); | |
315 | head = &evlist->heads[hash]; | |
316 | ||
317 | hlist_for_each_entry(sid, pos, head, node) | |
318 | if (sid->id == id) | |
319 | return sid->evsel; | |
30e68bcc NK |
320 | |
321 | if (!perf_evlist__sample_id_all(evlist)) | |
0c21f736 | 322 | return perf_evlist__first(evlist); |
30e68bcc | 323 | |
70db7533 ACM |
324 | return NULL; |
325 | } | |
04391deb | 326 | |
aece948f | 327 | union perf_event *perf_evlist__mmap_read(struct perf_evlist *evlist, int idx) |
04391deb | 328 | { |
aece948f | 329 | struct perf_mmap *md = &evlist->mmap[idx]; |
04391deb ACM |
330 | unsigned int head = perf_mmap__read_head(md); |
331 | unsigned int old = md->prev; | |
332 | unsigned char *data = md->base + page_size; | |
8115d60c | 333 | union perf_event *event = NULL; |
04391deb | 334 | |
7bb41152 | 335 | if (evlist->overwrite) { |
04391deb | 336 | /* |
7bb41152 ACM |
337 | * If we're further behind than half the buffer, there's a chance |
338 | * the writer will bite our tail and mess up the samples under us. | |
339 | * | |
340 | * If we somehow ended up ahead of the head, we got messed up. | |
341 | * | |
342 | * In either case, truncate and restart at head. | |
04391deb | 343 | */ |
7bb41152 ACM |
344 | int diff = head - old; |
345 | if (diff > md->mask / 2 || diff < 0) { | |
346 | fprintf(stderr, "WARNING: failed to keep up with mmap data.\n"); | |
347 | ||
348 | /* | |
349 | * head points to a known good entry, start there. | |
350 | */ | |
351 | old = head; | |
352 | } | |
04391deb ACM |
353 | } |
354 | ||
355 | if (old != head) { | |
356 | size_t size; | |
357 | ||
8115d60c | 358 | event = (union perf_event *)&data[old & md->mask]; |
04391deb ACM |
359 | size = event->header.size; |
360 | ||
361 | /* | |
362 | * Event straddles the mmap boundary -- header should always | |
363 | * be inside due to u64 alignment of output. | |
364 | */ | |
365 | if ((old & md->mask) + size != ((old + size) & md->mask)) { | |
366 | unsigned int offset = old; | |
367 | unsigned int len = min(sizeof(*event), size), cpy; | |
368 | void *dst = &evlist->event_copy; | |
369 | ||
370 | do { | |
371 | cpy = min(md->mask + 1 - (offset & md->mask), len); | |
372 | memcpy(dst, &data[offset & md->mask], cpy); | |
373 | offset += cpy; | |
374 | dst += cpy; | |
375 | len -= cpy; | |
376 | } while (len); | |
377 | ||
378 | event = &evlist->event_copy; | |
379 | } | |
380 | ||
381 | old += size; | |
382 | } | |
383 | ||
384 | md->prev = old; | |
7bb41152 ACM |
385 | |
386 | if (!evlist->overwrite) | |
387 | perf_mmap__write_tail(md, old); | |
388 | ||
04391deb ACM |
389 | return event; |
390 | } | |
f8a95309 | 391 | |
7e2ed097 | 392 | void perf_evlist__munmap(struct perf_evlist *evlist) |
f8a95309 | 393 | { |
aece948f | 394 | int i; |
f8a95309 | 395 | |
aece948f ACM |
396 | for (i = 0; i < evlist->nr_mmaps; i++) { |
397 | if (evlist->mmap[i].base != NULL) { | |
398 | munmap(evlist->mmap[i].base, evlist->mmap_len); | |
399 | evlist->mmap[i].base = NULL; | |
f8a95309 ACM |
400 | } |
401 | } | |
aece948f ACM |
402 | |
403 | free(evlist->mmap); | |
404 | evlist->mmap = NULL; | |
f8a95309 ACM |
405 | } |
406 | ||
806fb630 | 407 | static int perf_evlist__alloc_mmap(struct perf_evlist *evlist) |
f8a95309 | 408 | { |
a14bb7a6 ACM |
409 | evlist->nr_mmaps = cpu_map__nr(evlist->cpus); |
410 | if (cpu_map__all(evlist->cpus)) | |
aece948f ACM |
411 | evlist->nr_mmaps = evlist->threads->nr; |
412 | evlist->mmap = zalloc(evlist->nr_mmaps * sizeof(struct perf_mmap)); | |
f8a95309 ACM |
413 | return evlist->mmap != NULL ? 0 : -ENOMEM; |
414 | } | |
415 | ||
bccdaba0 | 416 | static int __perf_evlist__mmap(struct perf_evlist *evlist, |
aece948f | 417 | int idx, int prot, int mask, int fd) |
f8a95309 | 418 | { |
aece948f ACM |
419 | evlist->mmap[idx].prev = 0; |
420 | evlist->mmap[idx].mask = mask; | |
421 | evlist->mmap[idx].base = mmap(NULL, evlist->mmap_len, prot, | |
f8a95309 | 422 | MAP_SHARED, fd, 0); |
301b195d NE |
423 | if (evlist->mmap[idx].base == MAP_FAILED) { |
424 | evlist->mmap[idx].base = NULL; | |
f8a95309 | 425 | return -1; |
301b195d | 426 | } |
f8a95309 ACM |
427 | |
428 | perf_evlist__add_pollfd(evlist, fd); | |
429 | return 0; | |
430 | } | |
431 | ||
aece948f ACM |
432 | static int perf_evlist__mmap_per_cpu(struct perf_evlist *evlist, int prot, int mask) |
433 | { | |
434 | struct perf_evsel *evsel; | |
435 | int cpu, thread; | |
436 | ||
437 | for (cpu = 0; cpu < evlist->cpus->nr; cpu++) { | |
438 | int output = -1; | |
439 | ||
440 | for (thread = 0; thread < evlist->threads->nr; thread++) { | |
441 | list_for_each_entry(evsel, &evlist->entries, node) { | |
442 | int fd = FD(evsel, cpu, thread); | |
443 | ||
444 | if (output == -1) { | |
445 | output = fd; | |
bccdaba0 | 446 | if (__perf_evlist__mmap(evlist, cpu, |
aece948f ACM |
447 | prot, mask, output) < 0) |
448 | goto out_unmap; | |
449 | } else { | |
450 | if (ioctl(fd, PERF_EVENT_IOC_SET_OUTPUT, output) != 0) | |
451 | goto out_unmap; | |
452 | } | |
453 | ||
454 | if ((evsel->attr.read_format & PERF_FORMAT_ID) && | |
455 | perf_evlist__id_add_fd(evlist, evsel, cpu, thread, fd) < 0) | |
456 | goto out_unmap; | |
457 | } | |
458 | } | |
459 | } | |
460 | ||
461 | return 0; | |
462 | ||
463 | out_unmap: | |
464 | for (cpu = 0; cpu < evlist->cpus->nr; cpu++) { | |
465 | if (evlist->mmap[cpu].base != NULL) { | |
466 | munmap(evlist->mmap[cpu].base, evlist->mmap_len); | |
467 | evlist->mmap[cpu].base = NULL; | |
468 | } | |
469 | } | |
470 | return -1; | |
471 | } | |
472 | ||
473 | static int perf_evlist__mmap_per_thread(struct perf_evlist *evlist, int prot, int mask) | |
474 | { | |
475 | struct perf_evsel *evsel; | |
476 | int thread; | |
477 | ||
478 | for (thread = 0; thread < evlist->threads->nr; thread++) { | |
479 | int output = -1; | |
480 | ||
481 | list_for_each_entry(evsel, &evlist->entries, node) { | |
482 | int fd = FD(evsel, 0, thread); | |
483 | ||
484 | if (output == -1) { | |
485 | output = fd; | |
bccdaba0 | 486 | if (__perf_evlist__mmap(evlist, thread, |
aece948f ACM |
487 | prot, mask, output) < 0) |
488 | goto out_unmap; | |
489 | } else { | |
490 | if (ioctl(fd, PERF_EVENT_IOC_SET_OUTPUT, output) != 0) | |
491 | goto out_unmap; | |
492 | } | |
493 | ||
494 | if ((evsel->attr.read_format & PERF_FORMAT_ID) && | |
495 | perf_evlist__id_add_fd(evlist, evsel, 0, thread, fd) < 0) | |
496 | goto out_unmap; | |
497 | } | |
498 | } | |
499 | ||
500 | return 0; | |
501 | ||
502 | out_unmap: | |
503 | for (thread = 0; thread < evlist->threads->nr; thread++) { | |
504 | if (evlist->mmap[thread].base != NULL) { | |
505 | munmap(evlist->mmap[thread].base, evlist->mmap_len); | |
506 | evlist->mmap[thread].base = NULL; | |
507 | } | |
508 | } | |
509 | return -1; | |
510 | } | |
511 | ||
f8a95309 ACM |
512 | /** perf_evlist__mmap - Create per cpu maps to receive events |
513 | * | |
514 | * @evlist - list of events | |
f8a95309 ACM |
515 | * @pages - map length in pages |
516 | * @overwrite - overwrite older events? | |
517 | * | |
518 | * If overwrite is false the user needs to signal event consuption using: | |
519 | * | |
520 | * struct perf_mmap *m = &evlist->mmap[cpu]; | |
521 | * unsigned int head = perf_mmap__read_head(m); | |
522 | * | |
523 | * perf_mmap__write_tail(m, head) | |
7e2ed097 ACM |
524 | * |
525 | * Using perf_evlist__read_on_cpu does this automatically. | |
f8a95309 | 526 | */ |
50a682ce ACM |
527 | int perf_evlist__mmap(struct perf_evlist *evlist, unsigned int pages, |
528 | bool overwrite) | |
f8a95309 | 529 | { |
aece948f | 530 | struct perf_evsel *evsel; |
7e2ed097 ACM |
531 | const struct cpu_map *cpus = evlist->cpus; |
532 | const struct thread_map *threads = evlist->threads; | |
50a682ce ACM |
533 | int prot = PROT_READ | (overwrite ? 0 : PROT_WRITE), mask; |
534 | ||
535 | /* 512 kiB: default amount of unprivileged mlocked memory */ | |
536 | if (pages == UINT_MAX) | |
537 | pages = (512 * 1024) / page_size; | |
41d0d933 NE |
538 | else if (!is_power_of_2(pages)) |
539 | return -EINVAL; | |
50a682ce ACM |
540 | |
541 | mask = pages * page_size - 1; | |
f8a95309 | 542 | |
7e2ed097 | 543 | if (evlist->mmap == NULL && perf_evlist__alloc_mmap(evlist) < 0) |
f8a95309 ACM |
544 | return -ENOMEM; |
545 | ||
7e2ed097 | 546 | if (evlist->pollfd == NULL && perf_evlist__alloc_pollfd(evlist) < 0) |
f8a95309 ACM |
547 | return -ENOMEM; |
548 | ||
549 | evlist->overwrite = overwrite; | |
550 | evlist->mmap_len = (pages + 1) * page_size; | |
f8a95309 ACM |
551 | |
552 | list_for_each_entry(evsel, &evlist->entries, node) { | |
553 | if ((evsel->attr.read_format & PERF_FORMAT_ID) && | |
a91e5431 | 554 | evsel->sample_id == NULL && |
a14bb7a6 | 555 | perf_evsel__alloc_id(evsel, cpu_map__nr(cpus), threads->nr) < 0) |
f8a95309 | 556 | return -ENOMEM; |
f8a95309 ACM |
557 | } |
558 | ||
a14bb7a6 | 559 | if (cpu_map__all(cpus)) |
aece948f | 560 | return perf_evlist__mmap_per_thread(evlist, prot, mask); |
f8a95309 | 561 | |
aece948f | 562 | return perf_evlist__mmap_per_cpu(evlist, prot, mask); |
f8a95309 | 563 | } |
7e2ed097 | 564 | |
b809ac10 NK |
565 | int perf_evlist__create_maps(struct perf_evlist *evlist, |
566 | struct perf_target *target) | |
7e2ed097 | 567 | { |
b809ac10 NK |
568 | evlist->threads = thread_map__new_str(target->pid, target->tid, |
569 | target->uid); | |
7e2ed097 ACM |
570 | |
571 | if (evlist->threads == NULL) | |
572 | return -1; | |
573 | ||
879d77d0 | 574 | if (perf_target__has_task(target)) |
d67356e7 | 575 | evlist->cpus = cpu_map__dummy_new(); |
d1cb9fce NK |
576 | else if (!perf_target__has_cpu(target) && !target->uses_mmap) |
577 | evlist->cpus = cpu_map__dummy_new(); | |
879d77d0 NK |
578 | else |
579 | evlist->cpus = cpu_map__new(target->cpu_list); | |
7e2ed097 ACM |
580 | |
581 | if (evlist->cpus == NULL) | |
582 | goto out_delete_threads; | |
583 | ||
584 | return 0; | |
585 | ||
586 | out_delete_threads: | |
587 | thread_map__delete(evlist->threads); | |
588 | return -1; | |
589 | } | |
590 | ||
591 | void perf_evlist__delete_maps(struct perf_evlist *evlist) | |
592 | { | |
593 | cpu_map__delete(evlist->cpus); | |
594 | thread_map__delete(evlist->threads); | |
595 | evlist->cpus = NULL; | |
596 | evlist->threads = NULL; | |
597 | } | |
0a102479 | 598 | |
1491a632 | 599 | int perf_evlist__apply_filters(struct perf_evlist *evlist) |
0a102479 | 600 | { |
0a102479 | 601 | struct perf_evsel *evsel; |
745cefc5 ACM |
602 | int err = 0; |
603 | const int ncpus = cpu_map__nr(evlist->cpus), | |
604 | nthreads = evlist->threads->nr; | |
0a102479 FW |
605 | |
606 | list_for_each_entry(evsel, &evlist->entries, node) { | |
745cefc5 | 607 | if (evsel->filter == NULL) |
0a102479 | 608 | continue; |
745cefc5 ACM |
609 | |
610 | err = perf_evsel__set_filter(evsel, ncpus, nthreads, evsel->filter); | |
611 | if (err) | |
612 | break; | |
0a102479 FW |
613 | } |
614 | ||
745cefc5 ACM |
615 | return err; |
616 | } | |
617 | ||
618 | int perf_evlist__set_filter(struct perf_evlist *evlist, const char *filter) | |
619 | { | |
620 | struct perf_evsel *evsel; | |
621 | int err = 0; | |
622 | const int ncpus = cpu_map__nr(evlist->cpus), | |
623 | nthreads = evlist->threads->nr; | |
624 | ||
625 | list_for_each_entry(evsel, &evlist->entries, node) { | |
626 | err = perf_evsel__set_filter(evsel, ncpus, nthreads, filter); | |
627 | if (err) | |
628 | break; | |
629 | } | |
630 | ||
631 | return err; | |
0a102479 | 632 | } |
74429964 | 633 | |
0c21f736 | 634 | bool perf_evlist__valid_sample_type(struct perf_evlist *evlist) |
74429964 | 635 | { |
0c21f736 | 636 | struct perf_evsel *first = perf_evlist__first(evlist), *pos = first; |
c2a70653 ACM |
637 | |
638 | list_for_each_entry_continue(pos, &evlist->entries, node) { | |
639 | if (first->attr.sample_type != pos->attr.sample_type) | |
640 | return false; | |
74429964 FW |
641 | } |
642 | ||
c2a70653 | 643 | return true; |
74429964 FW |
644 | } |
645 | ||
0c21f736 | 646 | u64 perf_evlist__sample_type(struct perf_evlist *evlist) |
c2a70653 | 647 | { |
0c21f736 | 648 | struct perf_evsel *first = perf_evlist__first(evlist); |
c2a70653 ACM |
649 | return first->attr.sample_type; |
650 | } | |
651 | ||
0c21f736 | 652 | u16 perf_evlist__id_hdr_size(struct perf_evlist *evlist) |
81e36bff | 653 | { |
0c21f736 | 654 | struct perf_evsel *first = perf_evlist__first(evlist); |
81e36bff ACM |
655 | struct perf_sample *data; |
656 | u64 sample_type; | |
657 | u16 size = 0; | |
658 | ||
81e36bff ACM |
659 | if (!first->attr.sample_id_all) |
660 | goto out; | |
661 | ||
662 | sample_type = first->attr.sample_type; | |
663 | ||
664 | if (sample_type & PERF_SAMPLE_TID) | |
665 | size += sizeof(data->tid) * 2; | |
666 | ||
667 | if (sample_type & PERF_SAMPLE_TIME) | |
668 | size += sizeof(data->time); | |
669 | ||
670 | if (sample_type & PERF_SAMPLE_ID) | |
671 | size += sizeof(data->id); | |
672 | ||
673 | if (sample_type & PERF_SAMPLE_STREAM_ID) | |
674 | size += sizeof(data->stream_id); | |
675 | ||
676 | if (sample_type & PERF_SAMPLE_CPU) | |
677 | size += sizeof(data->cpu) * 2; | |
678 | out: | |
679 | return size; | |
680 | } | |
681 | ||
0c21f736 | 682 | bool perf_evlist__valid_sample_id_all(struct perf_evlist *evlist) |
74429964 | 683 | { |
0c21f736 | 684 | struct perf_evsel *first = perf_evlist__first(evlist), *pos = first; |
c2a70653 ACM |
685 | |
686 | list_for_each_entry_continue(pos, &evlist->entries, node) { | |
687 | if (first->attr.sample_id_all != pos->attr.sample_id_all) | |
688 | return false; | |
74429964 FW |
689 | } |
690 | ||
c2a70653 ACM |
691 | return true; |
692 | } | |
693 | ||
0c21f736 | 694 | bool perf_evlist__sample_id_all(struct perf_evlist *evlist) |
c2a70653 | 695 | { |
0c21f736 | 696 | struct perf_evsel *first = perf_evlist__first(evlist); |
c2a70653 | 697 | return first->attr.sample_id_all; |
74429964 | 698 | } |
81cce8de ACM |
699 | |
700 | void perf_evlist__set_selected(struct perf_evlist *evlist, | |
701 | struct perf_evsel *evsel) | |
702 | { | |
703 | evlist->selected = evsel; | |
704 | } | |
727ab04e | 705 | |
6a4bb04c | 706 | int perf_evlist__open(struct perf_evlist *evlist) |
727ab04e | 707 | { |
6a4bb04c | 708 | struct perf_evsel *evsel; |
727ab04e ACM |
709 | int err, ncpus, nthreads; |
710 | ||
727ab04e | 711 | list_for_each_entry(evsel, &evlist->entries, node) { |
6a4bb04c | 712 | err = perf_evsel__open(evsel, evlist->cpus, evlist->threads); |
727ab04e ACM |
713 | if (err < 0) |
714 | goto out_err; | |
715 | } | |
716 | ||
717 | return 0; | |
718 | out_err: | |
719 | ncpus = evlist->cpus ? evlist->cpus->nr : 1; | |
720 | nthreads = evlist->threads ? evlist->threads->nr : 1; | |
721 | ||
722 | list_for_each_entry_reverse(evsel, &evlist->entries, node) | |
723 | perf_evsel__close(evsel, ncpus, nthreads); | |
724 | ||
41c21a68 | 725 | errno = -err; |
727ab04e ACM |
726 | return err; |
727 | } | |
35b9d88e ACM |
728 | |
729 | int perf_evlist__prepare_workload(struct perf_evlist *evlist, | |
730 | struct perf_record_opts *opts, | |
731 | const char *argv[]) | |
732 | { | |
733 | int child_ready_pipe[2], go_pipe[2]; | |
734 | char bf; | |
735 | ||
736 | if (pipe(child_ready_pipe) < 0) { | |
737 | perror("failed to create 'ready' pipe"); | |
738 | return -1; | |
739 | } | |
740 | ||
741 | if (pipe(go_pipe) < 0) { | |
742 | perror("failed to create 'go' pipe"); | |
743 | goto out_close_ready_pipe; | |
744 | } | |
745 | ||
746 | evlist->workload.pid = fork(); | |
747 | if (evlist->workload.pid < 0) { | |
748 | perror("failed to fork"); | |
749 | goto out_close_pipes; | |
750 | } | |
751 | ||
752 | if (!evlist->workload.pid) { | |
753 | if (opts->pipe_output) | |
754 | dup2(2, 1); | |
755 | ||
756 | close(child_ready_pipe[0]); | |
757 | close(go_pipe[1]); | |
758 | fcntl(go_pipe[0], F_SETFD, FD_CLOEXEC); | |
759 | ||
760 | /* | |
761 | * Do a dummy execvp to get the PLT entry resolved, | |
762 | * so we avoid the resolver overhead on the real | |
763 | * execvp call. | |
764 | */ | |
765 | execvp("", (char **)argv); | |
766 | ||
767 | /* | |
768 | * Tell the parent we're ready to go | |
769 | */ | |
770 | close(child_ready_pipe[1]); | |
771 | ||
772 | /* | |
773 | * Wait until the parent tells us to go. | |
774 | */ | |
775 | if (read(go_pipe[0], &bf, 1) == -1) | |
776 | perror("unable to read pipe"); | |
777 | ||
778 | execvp(argv[0], (char **)argv); | |
779 | ||
780 | perror(argv[0]); | |
781 | kill(getppid(), SIGUSR1); | |
782 | exit(-1); | |
783 | } | |
784 | ||
d67356e7 | 785 | if (perf_target__none(&opts->target)) |
35b9d88e ACM |
786 | evlist->threads->map[0] = evlist->workload.pid; |
787 | ||
788 | close(child_ready_pipe[1]); | |
789 | close(go_pipe[0]); | |
790 | /* | |
791 | * wait for child to settle | |
792 | */ | |
793 | if (read(child_ready_pipe[0], &bf, 1) == -1) { | |
794 | perror("unable to read pipe"); | |
795 | goto out_close_pipes; | |
796 | } | |
797 | ||
798 | evlist->workload.cork_fd = go_pipe[1]; | |
799 | close(child_ready_pipe[0]); | |
800 | return 0; | |
801 | ||
802 | out_close_pipes: | |
803 | close(go_pipe[0]); | |
804 | close(go_pipe[1]); | |
805 | out_close_ready_pipe: | |
806 | close(child_ready_pipe[0]); | |
807 | close(child_ready_pipe[1]); | |
808 | return -1; | |
809 | } | |
810 | ||
811 | int perf_evlist__start_workload(struct perf_evlist *evlist) | |
812 | { | |
813 | if (evlist->workload.cork_fd > 0) { | |
814 | /* | |
815 | * Remove the cork, let it rip! | |
816 | */ | |
817 | return close(evlist->workload.cork_fd); | |
818 | } | |
819 | ||
820 | return 0; | |
821 | } | |
cb0b29e0 | 822 | |
a3f698fe | 823 | int perf_evlist__parse_sample(struct perf_evlist *evlist, union perf_event *event, |
0807d2d8 | 824 | struct perf_sample *sample) |
cb0b29e0 | 825 | { |
0c21f736 | 826 | struct perf_evsel *evsel = perf_evlist__first(evlist); |
0807d2d8 | 827 | return perf_evsel__parse_sample(evsel, event, sample); |
cb0b29e0 | 828 | } |
78f067b3 ACM |
829 | |
830 | size_t perf_evlist__fprintf(struct perf_evlist *evlist, FILE *fp) | |
831 | { | |
832 | struct perf_evsel *evsel; | |
833 | size_t printed = 0; | |
834 | ||
835 | list_for_each_entry(evsel, &evlist->entries, node) { | |
836 | printed += fprintf(fp, "%s%s", evsel->idx ? ", " : "", | |
837 | perf_evsel__name(evsel)); | |
838 | } | |
839 | ||
840 | return printed + fprintf(fp, "\n");; | |
841 | } |