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