]>
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" | |
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 | ||
ee29be62 ACM |
210 | static struct perf_evsel * |
211 | perf_evlist__find_tracepoint_by_id(struct perf_evlist *evlist, int id) | |
212 | { | |
213 | struct perf_evsel *evsel; | |
214 | ||
215 | list_for_each_entry(evsel, &evlist->entries, node) { | |
216 | if (evsel->attr.type == PERF_TYPE_TRACEPOINT && | |
217 | (int)evsel->attr.config == id) | |
218 | return evsel; | |
219 | } | |
220 | ||
221 | return NULL; | |
222 | } | |
223 | ||
224 | int perf_evlist__set_tracepoints_handlers(struct perf_evlist *evlist, | |
225 | const struct perf_evsel_str_handler *assocs, | |
226 | size_t nr_assocs) | |
227 | { | |
228 | struct perf_evsel *evsel; | |
229 | int err; | |
230 | size_t i; | |
231 | ||
232 | for (i = 0; i < nr_assocs; i++) { | |
233 | err = trace_event__id(assocs[i].name); | |
234 | if (err < 0) | |
235 | goto out; | |
236 | ||
237 | evsel = perf_evlist__find_tracepoint_by_id(evlist, err); | |
238 | if (evsel == NULL) | |
239 | continue; | |
240 | ||
241 | err = -EEXIST; | |
242 | if (evsel->handler.func != NULL) | |
243 | goto out; | |
244 | evsel->handler.func = assocs[i].handler; | |
245 | } | |
246 | ||
247 | err = 0; | |
248 | out: | |
249 | return err; | |
250 | } | |
251 | ||
4152ab37 ACM |
252 | void perf_evlist__disable(struct perf_evlist *evlist) |
253 | { | |
254 | int cpu, thread; | |
255 | struct perf_evsel *pos; | |
256 | ||
257 | for (cpu = 0; cpu < evlist->cpus->nr; cpu++) { | |
258 | list_for_each_entry(pos, &evlist->entries, node) { | |
259 | for (thread = 0; thread < evlist->threads->nr; thread++) | |
260 | ioctl(FD(pos, cpu, thread), PERF_EVENT_IOC_DISABLE); | |
261 | } | |
262 | } | |
263 | } | |
264 | ||
764e16a3 DA |
265 | void perf_evlist__enable(struct perf_evlist *evlist) |
266 | { | |
267 | int cpu, thread; | |
268 | struct perf_evsel *pos; | |
269 | ||
270 | for (cpu = 0; cpu < evlist->cpus->nr; cpu++) { | |
271 | list_for_each_entry(pos, &evlist->entries, node) { | |
272 | for (thread = 0; thread < evlist->threads->nr; thread++) | |
273 | ioctl(FD(pos, cpu, thread), PERF_EVENT_IOC_ENABLE); | |
274 | } | |
275 | } | |
276 | } | |
277 | ||
806fb630 | 278 | static int perf_evlist__alloc_pollfd(struct perf_evlist *evlist) |
5c581041 | 279 | { |
7e2ed097 | 280 | int nfds = evlist->cpus->nr * evlist->threads->nr * evlist->nr_entries; |
5c581041 ACM |
281 | evlist->pollfd = malloc(sizeof(struct pollfd) * nfds); |
282 | return evlist->pollfd != NULL ? 0 : -ENOMEM; | |
283 | } | |
70082dd9 ACM |
284 | |
285 | void perf_evlist__add_pollfd(struct perf_evlist *evlist, int fd) | |
286 | { | |
287 | fcntl(fd, F_SETFL, O_NONBLOCK); | |
288 | evlist->pollfd[evlist->nr_fds].fd = fd; | |
289 | evlist->pollfd[evlist->nr_fds].events = POLLIN; | |
290 | evlist->nr_fds++; | |
291 | } | |
70db7533 | 292 | |
a91e5431 ACM |
293 | static void perf_evlist__id_hash(struct perf_evlist *evlist, |
294 | struct perf_evsel *evsel, | |
295 | int cpu, int thread, u64 id) | |
3d3b5e95 ACM |
296 | { |
297 | int hash; | |
298 | struct perf_sample_id *sid = SID(evsel, cpu, thread); | |
299 | ||
300 | sid->id = id; | |
301 | sid->evsel = evsel; | |
302 | hash = hash_64(sid->id, PERF_EVLIST__HLIST_BITS); | |
303 | hlist_add_head(&sid->node, &evlist->heads[hash]); | |
304 | } | |
305 | ||
a91e5431 ACM |
306 | void perf_evlist__id_add(struct perf_evlist *evlist, struct perf_evsel *evsel, |
307 | int cpu, int thread, u64 id) | |
308 | { | |
309 | perf_evlist__id_hash(evlist, evsel, cpu, thread, id); | |
310 | evsel->id[evsel->ids++] = id; | |
311 | } | |
312 | ||
313 | static int perf_evlist__id_add_fd(struct perf_evlist *evlist, | |
314 | struct perf_evsel *evsel, | |
315 | int cpu, int thread, int fd) | |
f8a95309 | 316 | { |
f8a95309 | 317 | u64 read_data[4] = { 0, }; |
3d3b5e95 | 318 | int id_idx = 1; /* The first entry is the counter value */ |
f8a95309 ACM |
319 | |
320 | if (!(evsel->attr.read_format & PERF_FORMAT_ID) || | |
321 | read(fd, &read_data, sizeof(read_data)) == -1) | |
322 | return -1; | |
323 | ||
324 | if (evsel->attr.read_format & PERF_FORMAT_TOTAL_TIME_ENABLED) | |
325 | ++id_idx; | |
326 | if (evsel->attr.read_format & PERF_FORMAT_TOTAL_TIME_RUNNING) | |
327 | ++id_idx; | |
328 | ||
a91e5431 | 329 | perf_evlist__id_add(evlist, evsel, cpu, thread, read_data[id_idx]); |
f8a95309 ACM |
330 | return 0; |
331 | } | |
332 | ||
70db7533 ACM |
333 | struct perf_evsel *perf_evlist__id2evsel(struct perf_evlist *evlist, u64 id) |
334 | { | |
335 | struct hlist_head *head; | |
336 | struct hlist_node *pos; | |
337 | struct perf_sample_id *sid; | |
338 | int hash; | |
339 | ||
340 | if (evlist->nr_entries == 1) | |
341 | return list_entry(evlist->entries.next, struct perf_evsel, node); | |
342 | ||
343 | hash = hash_64(id, PERF_EVLIST__HLIST_BITS); | |
344 | head = &evlist->heads[hash]; | |
345 | ||
346 | hlist_for_each_entry(sid, pos, head, node) | |
347 | if (sid->id == id) | |
348 | return sid->evsel; | |
349 | return NULL; | |
350 | } | |
04391deb | 351 | |
aece948f | 352 | union perf_event *perf_evlist__mmap_read(struct perf_evlist *evlist, int idx) |
04391deb ACM |
353 | { |
354 | /* XXX Move this to perf.c, making it generally available */ | |
355 | unsigned int page_size = sysconf(_SC_PAGE_SIZE); | |
aece948f | 356 | struct perf_mmap *md = &evlist->mmap[idx]; |
04391deb ACM |
357 | unsigned int head = perf_mmap__read_head(md); |
358 | unsigned int old = md->prev; | |
359 | unsigned char *data = md->base + page_size; | |
8115d60c | 360 | union perf_event *event = NULL; |
04391deb | 361 | |
7bb41152 | 362 | if (evlist->overwrite) { |
04391deb | 363 | /* |
7bb41152 ACM |
364 | * If we're further behind than half the buffer, there's a chance |
365 | * the writer will bite our tail and mess up the samples under us. | |
366 | * | |
367 | * If we somehow ended up ahead of the head, we got messed up. | |
368 | * | |
369 | * In either case, truncate and restart at head. | |
04391deb | 370 | */ |
7bb41152 ACM |
371 | int diff = head - old; |
372 | if (diff > md->mask / 2 || diff < 0) { | |
373 | fprintf(stderr, "WARNING: failed to keep up with mmap data.\n"); | |
374 | ||
375 | /* | |
376 | * head points to a known good entry, start there. | |
377 | */ | |
378 | old = head; | |
379 | } | |
04391deb ACM |
380 | } |
381 | ||
382 | if (old != head) { | |
383 | size_t size; | |
384 | ||
8115d60c | 385 | event = (union perf_event *)&data[old & md->mask]; |
04391deb ACM |
386 | size = event->header.size; |
387 | ||
388 | /* | |
389 | * Event straddles the mmap boundary -- header should always | |
390 | * be inside due to u64 alignment of output. | |
391 | */ | |
392 | if ((old & md->mask) + size != ((old + size) & md->mask)) { | |
393 | unsigned int offset = old; | |
394 | unsigned int len = min(sizeof(*event), size), cpy; | |
395 | void *dst = &evlist->event_copy; | |
396 | ||
397 | do { | |
398 | cpy = min(md->mask + 1 - (offset & md->mask), len); | |
399 | memcpy(dst, &data[offset & md->mask], cpy); | |
400 | offset += cpy; | |
401 | dst += cpy; | |
402 | len -= cpy; | |
403 | } while (len); | |
404 | ||
405 | event = &evlist->event_copy; | |
406 | } | |
407 | ||
408 | old += size; | |
409 | } | |
410 | ||
411 | md->prev = old; | |
7bb41152 ACM |
412 | |
413 | if (!evlist->overwrite) | |
414 | perf_mmap__write_tail(md, old); | |
415 | ||
04391deb ACM |
416 | return event; |
417 | } | |
f8a95309 | 418 | |
7e2ed097 | 419 | void perf_evlist__munmap(struct perf_evlist *evlist) |
f8a95309 | 420 | { |
aece948f | 421 | int i; |
f8a95309 | 422 | |
aece948f ACM |
423 | for (i = 0; i < evlist->nr_mmaps; i++) { |
424 | if (evlist->mmap[i].base != NULL) { | |
425 | munmap(evlist->mmap[i].base, evlist->mmap_len); | |
426 | evlist->mmap[i].base = NULL; | |
f8a95309 ACM |
427 | } |
428 | } | |
aece948f ACM |
429 | |
430 | free(evlist->mmap); | |
431 | evlist->mmap = NULL; | |
f8a95309 ACM |
432 | } |
433 | ||
806fb630 | 434 | static int perf_evlist__alloc_mmap(struct perf_evlist *evlist) |
f8a95309 | 435 | { |
aece948f ACM |
436 | evlist->nr_mmaps = evlist->cpus->nr; |
437 | if (evlist->cpus->map[0] == -1) | |
438 | evlist->nr_mmaps = evlist->threads->nr; | |
439 | evlist->mmap = zalloc(evlist->nr_mmaps * sizeof(struct perf_mmap)); | |
f8a95309 ACM |
440 | return evlist->mmap != NULL ? 0 : -ENOMEM; |
441 | } | |
442 | ||
bccdaba0 | 443 | static int __perf_evlist__mmap(struct perf_evlist *evlist, |
aece948f | 444 | int idx, int prot, int mask, int fd) |
f8a95309 | 445 | { |
aece948f ACM |
446 | evlist->mmap[idx].prev = 0; |
447 | evlist->mmap[idx].mask = mask; | |
448 | evlist->mmap[idx].base = mmap(NULL, evlist->mmap_len, prot, | |
f8a95309 | 449 | MAP_SHARED, fd, 0); |
301b195d NE |
450 | if (evlist->mmap[idx].base == MAP_FAILED) { |
451 | evlist->mmap[idx].base = NULL; | |
f8a95309 | 452 | return -1; |
301b195d | 453 | } |
f8a95309 ACM |
454 | |
455 | perf_evlist__add_pollfd(evlist, fd); | |
456 | return 0; | |
457 | } | |
458 | ||
aece948f ACM |
459 | static int perf_evlist__mmap_per_cpu(struct perf_evlist *evlist, int prot, int mask) |
460 | { | |
461 | struct perf_evsel *evsel; | |
462 | int cpu, thread; | |
463 | ||
464 | for (cpu = 0; cpu < evlist->cpus->nr; cpu++) { | |
465 | int output = -1; | |
466 | ||
467 | for (thread = 0; thread < evlist->threads->nr; thread++) { | |
468 | list_for_each_entry(evsel, &evlist->entries, node) { | |
469 | int fd = FD(evsel, cpu, thread); | |
470 | ||
471 | if (output == -1) { | |
472 | output = fd; | |
bccdaba0 | 473 | if (__perf_evlist__mmap(evlist, cpu, |
aece948f ACM |
474 | prot, mask, output) < 0) |
475 | goto out_unmap; | |
476 | } else { | |
477 | if (ioctl(fd, PERF_EVENT_IOC_SET_OUTPUT, output) != 0) | |
478 | goto out_unmap; | |
479 | } | |
480 | ||
481 | if ((evsel->attr.read_format & PERF_FORMAT_ID) && | |
482 | perf_evlist__id_add_fd(evlist, evsel, cpu, thread, fd) < 0) | |
483 | goto out_unmap; | |
484 | } | |
485 | } | |
486 | } | |
487 | ||
488 | return 0; | |
489 | ||
490 | out_unmap: | |
491 | for (cpu = 0; cpu < evlist->cpus->nr; cpu++) { | |
492 | if (evlist->mmap[cpu].base != NULL) { | |
493 | munmap(evlist->mmap[cpu].base, evlist->mmap_len); | |
494 | evlist->mmap[cpu].base = NULL; | |
495 | } | |
496 | } | |
497 | return -1; | |
498 | } | |
499 | ||
500 | static int perf_evlist__mmap_per_thread(struct perf_evlist *evlist, int prot, int mask) | |
501 | { | |
502 | struct perf_evsel *evsel; | |
503 | int thread; | |
504 | ||
505 | for (thread = 0; thread < evlist->threads->nr; thread++) { | |
506 | int output = -1; | |
507 | ||
508 | list_for_each_entry(evsel, &evlist->entries, node) { | |
509 | int fd = FD(evsel, 0, thread); | |
510 | ||
511 | if (output == -1) { | |
512 | output = fd; | |
bccdaba0 | 513 | if (__perf_evlist__mmap(evlist, thread, |
aece948f ACM |
514 | prot, mask, output) < 0) |
515 | goto out_unmap; | |
516 | } else { | |
517 | if (ioctl(fd, PERF_EVENT_IOC_SET_OUTPUT, output) != 0) | |
518 | goto out_unmap; | |
519 | } | |
520 | ||
521 | if ((evsel->attr.read_format & PERF_FORMAT_ID) && | |
522 | perf_evlist__id_add_fd(evlist, evsel, 0, thread, fd) < 0) | |
523 | goto out_unmap; | |
524 | } | |
525 | } | |
526 | ||
527 | return 0; | |
528 | ||
529 | out_unmap: | |
530 | for (thread = 0; thread < evlist->threads->nr; thread++) { | |
531 | if (evlist->mmap[thread].base != NULL) { | |
532 | munmap(evlist->mmap[thread].base, evlist->mmap_len); | |
533 | evlist->mmap[thread].base = NULL; | |
534 | } | |
535 | } | |
536 | return -1; | |
537 | } | |
538 | ||
f8a95309 ACM |
539 | /** perf_evlist__mmap - Create per cpu maps to receive events |
540 | * | |
541 | * @evlist - list of events | |
f8a95309 ACM |
542 | * @pages - map length in pages |
543 | * @overwrite - overwrite older events? | |
544 | * | |
545 | * If overwrite is false the user needs to signal event consuption using: | |
546 | * | |
547 | * struct perf_mmap *m = &evlist->mmap[cpu]; | |
548 | * unsigned int head = perf_mmap__read_head(m); | |
549 | * | |
550 | * perf_mmap__write_tail(m, head) | |
7e2ed097 ACM |
551 | * |
552 | * Using perf_evlist__read_on_cpu does this automatically. | |
f8a95309 | 553 | */ |
50a682ce ACM |
554 | int perf_evlist__mmap(struct perf_evlist *evlist, unsigned int pages, |
555 | bool overwrite) | |
f8a95309 ACM |
556 | { |
557 | unsigned int page_size = sysconf(_SC_PAGE_SIZE); | |
aece948f | 558 | struct perf_evsel *evsel; |
7e2ed097 ACM |
559 | const struct cpu_map *cpus = evlist->cpus; |
560 | const struct thread_map *threads = evlist->threads; | |
50a682ce ACM |
561 | int prot = PROT_READ | (overwrite ? 0 : PROT_WRITE), mask; |
562 | ||
563 | /* 512 kiB: default amount of unprivileged mlocked memory */ | |
564 | if (pages == UINT_MAX) | |
565 | pages = (512 * 1024) / page_size; | |
41d0d933 NE |
566 | else if (!is_power_of_2(pages)) |
567 | return -EINVAL; | |
50a682ce ACM |
568 | |
569 | mask = pages * page_size - 1; | |
f8a95309 | 570 | |
7e2ed097 | 571 | if (evlist->mmap == NULL && perf_evlist__alloc_mmap(evlist) < 0) |
f8a95309 ACM |
572 | return -ENOMEM; |
573 | ||
7e2ed097 | 574 | if (evlist->pollfd == NULL && perf_evlist__alloc_pollfd(evlist) < 0) |
f8a95309 ACM |
575 | return -ENOMEM; |
576 | ||
577 | evlist->overwrite = overwrite; | |
578 | evlist->mmap_len = (pages + 1) * page_size; | |
f8a95309 ACM |
579 | |
580 | list_for_each_entry(evsel, &evlist->entries, node) { | |
581 | if ((evsel->attr.read_format & PERF_FORMAT_ID) && | |
a91e5431 | 582 | evsel->sample_id == NULL && |
f8a95309 ACM |
583 | perf_evsel__alloc_id(evsel, cpus->nr, threads->nr) < 0) |
584 | return -ENOMEM; | |
f8a95309 ACM |
585 | } |
586 | ||
aece948f ACM |
587 | if (evlist->cpus->map[0] == -1) |
588 | return perf_evlist__mmap_per_thread(evlist, prot, mask); | |
f8a95309 | 589 | |
aece948f | 590 | return perf_evlist__mmap_per_cpu(evlist, prot, mask); |
f8a95309 | 591 | } |
7e2ed097 ACM |
592 | |
593 | int perf_evlist__create_maps(struct perf_evlist *evlist, pid_t target_pid, | |
594 | pid_t target_tid, const char *cpu_list) | |
595 | { | |
596 | evlist->threads = thread_map__new(target_pid, target_tid); | |
597 | ||
598 | if (evlist->threads == NULL) | |
599 | return -1; | |
600 | ||
b9019418 | 601 | if (cpu_list == NULL && target_tid != -1) |
7e2ed097 ACM |
602 | evlist->cpus = cpu_map__dummy_new(); |
603 | else | |
604 | evlist->cpus = cpu_map__new(cpu_list); | |
605 | ||
606 | if (evlist->cpus == NULL) | |
607 | goto out_delete_threads; | |
608 | ||
609 | return 0; | |
610 | ||
611 | out_delete_threads: | |
612 | thread_map__delete(evlist->threads); | |
613 | return -1; | |
614 | } | |
615 | ||
616 | void perf_evlist__delete_maps(struct perf_evlist *evlist) | |
617 | { | |
618 | cpu_map__delete(evlist->cpus); | |
619 | thread_map__delete(evlist->threads); | |
620 | evlist->cpus = NULL; | |
621 | evlist->threads = NULL; | |
622 | } | |
0a102479 FW |
623 | |
624 | int perf_evlist__set_filters(struct perf_evlist *evlist) | |
625 | { | |
626 | const struct thread_map *threads = evlist->threads; | |
627 | const struct cpu_map *cpus = evlist->cpus; | |
628 | struct perf_evsel *evsel; | |
629 | char *filter; | |
630 | int thread; | |
631 | int cpu; | |
632 | int err; | |
633 | int fd; | |
634 | ||
635 | list_for_each_entry(evsel, &evlist->entries, node) { | |
636 | filter = evsel->filter; | |
637 | if (!filter) | |
638 | continue; | |
639 | for (cpu = 0; cpu < cpus->nr; cpu++) { | |
640 | for (thread = 0; thread < threads->nr; thread++) { | |
641 | fd = FD(evsel, cpu, thread); | |
642 | err = ioctl(fd, PERF_EVENT_IOC_SET_FILTER, filter); | |
643 | if (err) | |
644 | return err; | |
645 | } | |
646 | } | |
647 | } | |
648 | ||
649 | return 0; | |
650 | } | |
74429964 | 651 | |
c2a70653 | 652 | bool perf_evlist__valid_sample_type(const struct perf_evlist *evlist) |
74429964 | 653 | { |
c2a70653 ACM |
654 | struct perf_evsel *pos, *first; |
655 | ||
656 | pos = first = list_entry(evlist->entries.next, struct perf_evsel, node); | |
657 | ||
658 | list_for_each_entry_continue(pos, &evlist->entries, node) { | |
659 | if (first->attr.sample_type != pos->attr.sample_type) | |
660 | return false; | |
74429964 FW |
661 | } |
662 | ||
c2a70653 | 663 | return true; |
74429964 FW |
664 | } |
665 | ||
c2a70653 ACM |
666 | u64 perf_evlist__sample_type(const struct perf_evlist *evlist) |
667 | { | |
668 | struct perf_evsel *first; | |
669 | ||
670 | first = list_entry(evlist->entries.next, struct perf_evsel, node); | |
671 | return first->attr.sample_type; | |
672 | } | |
673 | ||
81e36bff ACM |
674 | u16 perf_evlist__id_hdr_size(const struct perf_evlist *evlist) |
675 | { | |
676 | struct perf_evsel *first; | |
677 | struct perf_sample *data; | |
678 | u64 sample_type; | |
679 | u16 size = 0; | |
680 | ||
681 | first = list_entry(evlist->entries.next, struct perf_evsel, node); | |
682 | ||
683 | if (!first->attr.sample_id_all) | |
684 | goto out; | |
685 | ||
686 | sample_type = first->attr.sample_type; | |
687 | ||
688 | if (sample_type & PERF_SAMPLE_TID) | |
689 | size += sizeof(data->tid) * 2; | |
690 | ||
691 | if (sample_type & PERF_SAMPLE_TIME) | |
692 | size += sizeof(data->time); | |
693 | ||
694 | if (sample_type & PERF_SAMPLE_ID) | |
695 | size += sizeof(data->id); | |
696 | ||
697 | if (sample_type & PERF_SAMPLE_STREAM_ID) | |
698 | size += sizeof(data->stream_id); | |
699 | ||
700 | if (sample_type & PERF_SAMPLE_CPU) | |
701 | size += sizeof(data->cpu) * 2; | |
702 | out: | |
703 | return size; | |
704 | } | |
705 | ||
c2a70653 | 706 | bool perf_evlist__valid_sample_id_all(const struct perf_evlist *evlist) |
74429964 | 707 | { |
c2a70653 ACM |
708 | struct perf_evsel *pos, *first; |
709 | ||
710 | pos = first = list_entry(evlist->entries.next, struct perf_evsel, node); | |
711 | ||
712 | list_for_each_entry_continue(pos, &evlist->entries, node) { | |
713 | if (first->attr.sample_id_all != pos->attr.sample_id_all) | |
714 | return false; | |
74429964 FW |
715 | } |
716 | ||
c2a70653 ACM |
717 | return true; |
718 | } | |
719 | ||
720 | bool perf_evlist__sample_id_all(const struct perf_evlist *evlist) | |
721 | { | |
722 | struct perf_evsel *first; | |
723 | ||
724 | first = list_entry(evlist->entries.next, struct perf_evsel, node); | |
725 | return first->attr.sample_id_all; | |
74429964 | 726 | } |
81cce8de ACM |
727 | |
728 | void perf_evlist__set_selected(struct perf_evlist *evlist, | |
729 | struct perf_evsel *evsel) | |
730 | { | |
731 | evlist->selected = evsel; | |
732 | } | |
727ab04e ACM |
733 | |
734 | int perf_evlist__open(struct perf_evlist *evlist, bool group) | |
735 | { | |
736 | struct perf_evsel *evsel, *first; | |
737 | int err, ncpus, nthreads; | |
738 | ||
739 | first = list_entry(evlist->entries.next, struct perf_evsel, node); | |
740 | ||
741 | list_for_each_entry(evsel, &evlist->entries, node) { | |
742 | struct xyarray *group_fd = NULL; | |
743 | ||
744 | if (group && evsel != first) | |
745 | group_fd = first->fd; | |
746 | ||
747 | err = perf_evsel__open(evsel, evlist->cpus, evlist->threads, | |
748 | group, group_fd); | |
749 | if (err < 0) | |
750 | goto out_err; | |
751 | } | |
752 | ||
753 | return 0; | |
754 | out_err: | |
755 | ncpus = evlist->cpus ? evlist->cpus->nr : 1; | |
756 | nthreads = evlist->threads ? evlist->threads->nr : 1; | |
757 | ||
758 | list_for_each_entry_reverse(evsel, &evlist->entries, node) | |
759 | perf_evsel__close(evsel, ncpus, nthreads); | |
760 | ||
761 | return err; | |
762 | } | |
35b9d88e ACM |
763 | |
764 | int perf_evlist__prepare_workload(struct perf_evlist *evlist, | |
765 | struct perf_record_opts *opts, | |
766 | const char *argv[]) | |
767 | { | |
768 | int child_ready_pipe[2], go_pipe[2]; | |
769 | char bf; | |
770 | ||
771 | if (pipe(child_ready_pipe) < 0) { | |
772 | perror("failed to create 'ready' pipe"); | |
773 | return -1; | |
774 | } | |
775 | ||
776 | if (pipe(go_pipe) < 0) { | |
777 | perror("failed to create 'go' pipe"); | |
778 | goto out_close_ready_pipe; | |
779 | } | |
780 | ||
781 | evlist->workload.pid = fork(); | |
782 | if (evlist->workload.pid < 0) { | |
783 | perror("failed to fork"); | |
784 | goto out_close_pipes; | |
785 | } | |
786 | ||
787 | if (!evlist->workload.pid) { | |
788 | if (opts->pipe_output) | |
789 | dup2(2, 1); | |
790 | ||
791 | close(child_ready_pipe[0]); | |
792 | close(go_pipe[1]); | |
793 | fcntl(go_pipe[0], F_SETFD, FD_CLOEXEC); | |
794 | ||
795 | /* | |
796 | * Do a dummy execvp to get the PLT entry resolved, | |
797 | * so we avoid the resolver overhead on the real | |
798 | * execvp call. | |
799 | */ | |
800 | execvp("", (char **)argv); | |
801 | ||
802 | /* | |
803 | * Tell the parent we're ready to go | |
804 | */ | |
805 | close(child_ready_pipe[1]); | |
806 | ||
807 | /* | |
808 | * Wait until the parent tells us to go. | |
809 | */ | |
810 | if (read(go_pipe[0], &bf, 1) == -1) | |
811 | perror("unable to read pipe"); | |
812 | ||
813 | execvp(argv[0], (char **)argv); | |
814 | ||
815 | perror(argv[0]); | |
816 | kill(getppid(), SIGUSR1); | |
817 | exit(-1); | |
818 | } | |
819 | ||
820 | if (!opts->system_wide && opts->target_tid == -1 && opts->target_pid == -1) | |
821 | evlist->threads->map[0] = evlist->workload.pid; | |
822 | ||
823 | close(child_ready_pipe[1]); | |
824 | close(go_pipe[0]); | |
825 | /* | |
826 | * wait for child to settle | |
827 | */ | |
828 | if (read(child_ready_pipe[0], &bf, 1) == -1) { | |
829 | perror("unable to read pipe"); | |
830 | goto out_close_pipes; | |
831 | } | |
832 | ||
833 | evlist->workload.cork_fd = go_pipe[1]; | |
834 | close(child_ready_pipe[0]); | |
835 | return 0; | |
836 | ||
837 | out_close_pipes: | |
838 | close(go_pipe[0]); | |
839 | close(go_pipe[1]); | |
840 | out_close_ready_pipe: | |
841 | close(child_ready_pipe[0]); | |
842 | close(child_ready_pipe[1]); | |
843 | return -1; | |
844 | } | |
845 | ||
846 | int perf_evlist__start_workload(struct perf_evlist *evlist) | |
847 | { | |
848 | if (evlist->workload.cork_fd > 0) { | |
849 | /* | |
850 | * Remove the cork, let it rip! | |
851 | */ | |
852 | return close(evlist->workload.cork_fd); | |
853 | } | |
854 | ||
855 | return 0; | |
856 | } |