Commit | Line | Data |
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f8a95309 ACM |
1 | /* |
2 | * Copyright (C) 2011, Red Hat Inc, Arnaldo Carvalho de Melo <acme@redhat.com> | |
3 | * | |
4 | * Parts came from builtin-{top,stat,record}.c, see those files for further | |
5 | * copyright notes. | |
6 | * | |
7 | * Released under the GPL v2. (and only v2, not any later version) | |
8 | */ | |
a8c9ae18 | 9 | #include "util.h" |
85c66be1 | 10 | #include <lk/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" | |
e3e1a54f | 17 | #include "debug.h" |
35b9d88e | 18 | #include <unistd.h> |
361c99a6 | 19 | |
50d08e47 | 20 | #include "parse-events.h" |
994a1f78 | 21 | #include "parse-options.h" |
50d08e47 | 22 | |
f8a95309 ACM |
23 | #include <sys/mman.h> |
24 | ||
70db7533 ACM |
25 | #include <linux/bitops.h> |
26 | #include <linux/hash.h> | |
27 | ||
f8a95309 | 28 | #define FD(e, x, y) (*(int *)xyarray__entry(e->fd, x, y)) |
a91e5431 | 29 | #define SID(e, x, y) xyarray__entry(e->sample_id, x, y) |
f8a95309 | 30 | |
7e2ed097 ACM |
31 | void perf_evlist__init(struct perf_evlist *evlist, struct cpu_map *cpus, |
32 | struct thread_map *threads) | |
ef1d1af2 ACM |
33 | { |
34 | int i; | |
35 | ||
36 | for (i = 0; i < PERF_EVLIST__HLIST_SIZE; ++i) | |
37 | INIT_HLIST_HEAD(&evlist->heads[i]); | |
38 | INIT_LIST_HEAD(&evlist->entries); | |
7e2ed097 | 39 | perf_evlist__set_maps(evlist, cpus, threads); |
35b9d88e | 40 | evlist->workload.pid = -1; |
ef1d1af2 ACM |
41 | } |
42 | ||
334fe7a3 | 43 | struct perf_evlist *perf_evlist__new(void) |
361c99a6 ACM |
44 | { |
45 | struct perf_evlist *evlist = zalloc(sizeof(*evlist)); | |
46 | ||
ef1d1af2 | 47 | if (evlist != NULL) |
334fe7a3 | 48 | perf_evlist__init(evlist, NULL, NULL); |
361c99a6 ACM |
49 | |
50 | return evlist; | |
51 | } | |
52 | ||
b22d54b0 JO |
53 | struct perf_evlist *perf_evlist__new_default(void) |
54 | { | |
55 | struct perf_evlist *evlist = perf_evlist__new(); | |
56 | ||
57 | if (evlist && perf_evlist__add_default(evlist)) { | |
58 | perf_evlist__delete(evlist); | |
59 | evlist = NULL; | |
60 | } | |
61 | ||
62 | return evlist; | |
63 | } | |
64 | ||
75562573 AH |
65 | /** |
66 | * perf_evlist__set_id_pos - set the positions of event ids. | |
67 | * @evlist: selected event list | |
68 | * | |
69 | * Events with compatible sample types all have the same id_pos | |
70 | * and is_pos. For convenience, put a copy on evlist. | |
71 | */ | |
72 | void perf_evlist__set_id_pos(struct perf_evlist *evlist) | |
73 | { | |
74 | struct perf_evsel *first = perf_evlist__first(evlist); | |
75 | ||
76 | evlist->id_pos = first->id_pos; | |
77 | evlist->is_pos = first->is_pos; | |
78 | } | |
79 | ||
733cd2fe AH |
80 | static void perf_evlist__update_id_pos(struct perf_evlist *evlist) |
81 | { | |
82 | struct perf_evsel *evsel; | |
83 | ||
84 | list_for_each_entry(evsel, &evlist->entries, node) | |
85 | perf_evsel__calc_id_pos(evsel); | |
86 | ||
87 | perf_evlist__set_id_pos(evlist); | |
88 | } | |
89 | ||
361c99a6 ACM |
90 | static void perf_evlist__purge(struct perf_evlist *evlist) |
91 | { | |
92 | struct perf_evsel *pos, *n; | |
93 | ||
94 | list_for_each_entry_safe(pos, n, &evlist->entries, node) { | |
95 | list_del_init(&pos->node); | |
96 | perf_evsel__delete(pos); | |
97 | } | |
98 | ||
99 | evlist->nr_entries = 0; | |
100 | } | |
101 | ||
ef1d1af2 | 102 | void perf_evlist__exit(struct perf_evlist *evlist) |
361c99a6 | 103 | { |
70db7533 | 104 | free(evlist->mmap); |
5c581041 | 105 | free(evlist->pollfd); |
ef1d1af2 ACM |
106 | evlist->mmap = NULL; |
107 | evlist->pollfd = NULL; | |
108 | } | |
109 | ||
110 | void perf_evlist__delete(struct perf_evlist *evlist) | |
111 | { | |
112 | perf_evlist__purge(evlist); | |
113 | perf_evlist__exit(evlist); | |
361c99a6 ACM |
114 | free(evlist); |
115 | } | |
116 | ||
117 | void perf_evlist__add(struct perf_evlist *evlist, struct perf_evsel *entry) | |
118 | { | |
119 | list_add_tail(&entry->node, &evlist->entries); | |
ef503831 ACM |
120 | entry->idx = evlist->nr_entries; |
121 | ||
75562573 AH |
122 | if (!evlist->nr_entries++) |
123 | perf_evlist__set_id_pos(evlist); | |
361c99a6 ACM |
124 | } |
125 | ||
0529bc1f JO |
126 | void perf_evlist__splice_list_tail(struct perf_evlist *evlist, |
127 | struct list_head *list, | |
128 | int nr_entries) | |
50d08e47 | 129 | { |
75562573 AH |
130 | bool set_id_pos = !evlist->nr_entries; |
131 | ||
50d08e47 ACM |
132 | list_splice_tail(list, &evlist->entries); |
133 | evlist->nr_entries += nr_entries; | |
75562573 AH |
134 | if (set_id_pos) |
135 | perf_evlist__set_id_pos(evlist); | |
50d08e47 ACM |
136 | } |
137 | ||
63dab225 ACM |
138 | void __perf_evlist__set_leader(struct list_head *list) |
139 | { | |
140 | struct perf_evsel *evsel, *leader; | |
141 | ||
142 | leader = list_entry(list->next, struct perf_evsel, node); | |
97f63e4a NK |
143 | evsel = list_entry(list->prev, struct perf_evsel, node); |
144 | ||
145 | leader->nr_members = evsel->idx - leader->idx + 1; | |
63dab225 ACM |
146 | |
147 | list_for_each_entry(evsel, list, node) { | |
74b2133d | 148 | evsel->leader = leader; |
63dab225 ACM |
149 | } |
150 | } | |
151 | ||
152 | void perf_evlist__set_leader(struct perf_evlist *evlist) | |
6a4bb04c | 153 | { |
97f63e4a NK |
154 | if (evlist->nr_entries) { |
155 | evlist->nr_groups = evlist->nr_entries > 1 ? 1 : 0; | |
63dab225 | 156 | __perf_evlist__set_leader(&evlist->entries); |
97f63e4a | 157 | } |
6a4bb04c JO |
158 | } |
159 | ||
361c99a6 ACM |
160 | int perf_evlist__add_default(struct perf_evlist *evlist) |
161 | { | |
162 | struct perf_event_attr attr = { | |
163 | .type = PERF_TYPE_HARDWARE, | |
164 | .config = PERF_COUNT_HW_CPU_CYCLES, | |
165 | }; | |
1aed2671 JR |
166 | struct perf_evsel *evsel; |
167 | ||
168 | event_attr_init(&attr); | |
361c99a6 | 169 | |
ef503831 | 170 | evsel = perf_evsel__new(&attr); |
361c99a6 | 171 | if (evsel == NULL) |
cc2d86b0 SE |
172 | goto error; |
173 | ||
174 | /* use strdup() because free(evsel) assumes name is allocated */ | |
175 | evsel->name = strdup("cycles"); | |
176 | if (!evsel->name) | |
177 | goto error_free; | |
361c99a6 ACM |
178 | |
179 | perf_evlist__add(evlist, evsel); | |
180 | return 0; | |
cc2d86b0 SE |
181 | error_free: |
182 | perf_evsel__delete(evsel); | |
183 | error: | |
184 | return -ENOMEM; | |
361c99a6 | 185 | } |
5c581041 | 186 | |
e60fc847 ACM |
187 | static int perf_evlist__add_attrs(struct perf_evlist *evlist, |
188 | struct perf_event_attr *attrs, size_t nr_attrs) | |
50d08e47 ACM |
189 | { |
190 | struct perf_evsel *evsel, *n; | |
191 | LIST_HEAD(head); | |
192 | size_t i; | |
193 | ||
194 | for (i = 0; i < nr_attrs; i++) { | |
ef503831 | 195 | evsel = perf_evsel__new_idx(attrs + i, evlist->nr_entries + i); |
50d08e47 ACM |
196 | if (evsel == NULL) |
197 | goto out_delete_partial_list; | |
198 | list_add_tail(&evsel->node, &head); | |
199 | } | |
200 | ||
201 | perf_evlist__splice_list_tail(evlist, &head, nr_attrs); | |
202 | ||
203 | return 0; | |
204 | ||
205 | out_delete_partial_list: | |
206 | list_for_each_entry_safe(evsel, n, &head, node) | |
207 | perf_evsel__delete(evsel); | |
208 | return -1; | |
209 | } | |
210 | ||
79695e1b ACM |
211 | int __perf_evlist__add_default_attrs(struct perf_evlist *evlist, |
212 | struct perf_event_attr *attrs, size_t nr_attrs) | |
213 | { | |
214 | size_t i; | |
215 | ||
216 | for (i = 0; i < nr_attrs; i++) | |
217 | event_attr_init(attrs + i); | |
218 | ||
219 | return perf_evlist__add_attrs(evlist, attrs, nr_attrs); | |
220 | } | |
221 | ||
da378962 ACM |
222 | struct perf_evsel * |
223 | perf_evlist__find_tracepoint_by_id(struct perf_evlist *evlist, int id) | |
ee29be62 ACM |
224 | { |
225 | struct perf_evsel *evsel; | |
226 | ||
227 | list_for_each_entry(evsel, &evlist->entries, node) { | |
228 | if (evsel->attr.type == PERF_TYPE_TRACEPOINT && | |
229 | (int)evsel->attr.config == id) | |
230 | return evsel; | |
231 | } | |
232 | ||
233 | return NULL; | |
234 | } | |
235 | ||
a2f2804a DA |
236 | struct perf_evsel * |
237 | perf_evlist__find_tracepoint_by_name(struct perf_evlist *evlist, | |
238 | const char *name) | |
239 | { | |
240 | struct perf_evsel *evsel; | |
241 | ||
242 | list_for_each_entry(evsel, &evlist->entries, node) { | |
243 | if ((evsel->attr.type == PERF_TYPE_TRACEPOINT) && | |
244 | (strcmp(evsel->name, name) == 0)) | |
245 | return evsel; | |
246 | } | |
247 | ||
248 | return NULL; | |
249 | } | |
250 | ||
39876e7d ACM |
251 | int perf_evlist__add_newtp(struct perf_evlist *evlist, |
252 | const char *sys, const char *name, void *handler) | |
253 | { | |
ef503831 | 254 | struct perf_evsel *evsel = perf_evsel__newtp(sys, name); |
39876e7d | 255 | |
39876e7d ACM |
256 | if (evsel == NULL) |
257 | return -1; | |
258 | ||
744a9719 | 259 | evsel->handler = handler; |
39876e7d ACM |
260 | perf_evlist__add(evlist, evsel); |
261 | return 0; | |
262 | } | |
263 | ||
4152ab37 ACM |
264 | void perf_evlist__disable(struct perf_evlist *evlist) |
265 | { | |
266 | int cpu, thread; | |
267 | struct perf_evsel *pos; | |
b3a319d5 NK |
268 | int nr_cpus = cpu_map__nr(evlist->cpus); |
269 | int nr_threads = thread_map__nr(evlist->threads); | |
4152ab37 | 270 | |
b3a319d5 | 271 | for (cpu = 0; cpu < nr_cpus; cpu++) { |
4152ab37 | 272 | list_for_each_entry(pos, &evlist->entries, node) { |
395c3070 | 273 | if (!perf_evsel__is_group_leader(pos) || !pos->fd) |
3fe4430d | 274 | continue; |
b3a319d5 | 275 | for (thread = 0; thread < nr_threads; thread++) |
55da8005 NK |
276 | ioctl(FD(pos, cpu, thread), |
277 | PERF_EVENT_IOC_DISABLE, 0); | |
4152ab37 ACM |
278 | } |
279 | } | |
280 | } | |
281 | ||
764e16a3 DA |
282 | void perf_evlist__enable(struct perf_evlist *evlist) |
283 | { | |
284 | int cpu, thread; | |
285 | struct perf_evsel *pos; | |
b3a319d5 NK |
286 | int nr_cpus = cpu_map__nr(evlist->cpus); |
287 | int nr_threads = thread_map__nr(evlist->threads); | |
764e16a3 | 288 | |
b3a319d5 | 289 | for (cpu = 0; cpu < nr_cpus; cpu++) { |
764e16a3 | 290 | list_for_each_entry(pos, &evlist->entries, node) { |
395c3070 | 291 | if (!perf_evsel__is_group_leader(pos) || !pos->fd) |
3fe4430d | 292 | continue; |
b3a319d5 | 293 | for (thread = 0; thread < nr_threads; thread++) |
55da8005 NK |
294 | ioctl(FD(pos, cpu, thread), |
295 | PERF_EVENT_IOC_ENABLE, 0); | |
764e16a3 DA |
296 | } |
297 | } | |
298 | } | |
299 | ||
395c3070 AH |
300 | int perf_evlist__disable_event(struct perf_evlist *evlist, |
301 | struct perf_evsel *evsel) | |
302 | { | |
303 | int cpu, thread, err; | |
304 | ||
305 | if (!evsel->fd) | |
306 | return 0; | |
307 | ||
308 | for (cpu = 0; cpu < evlist->cpus->nr; cpu++) { | |
309 | for (thread = 0; thread < evlist->threads->nr; thread++) { | |
310 | err = ioctl(FD(evsel, cpu, thread), | |
311 | PERF_EVENT_IOC_DISABLE, 0); | |
312 | if (err) | |
313 | return err; | |
314 | } | |
315 | } | |
316 | return 0; | |
317 | } | |
318 | ||
319 | int perf_evlist__enable_event(struct perf_evlist *evlist, | |
320 | struct perf_evsel *evsel) | |
321 | { | |
322 | int cpu, thread, err; | |
323 | ||
324 | if (!evsel->fd) | |
325 | return -EINVAL; | |
326 | ||
327 | for (cpu = 0; cpu < evlist->cpus->nr; cpu++) { | |
328 | for (thread = 0; thread < evlist->threads->nr; thread++) { | |
329 | err = ioctl(FD(evsel, cpu, thread), | |
330 | PERF_EVENT_IOC_ENABLE, 0); | |
331 | if (err) | |
332 | return err; | |
333 | } | |
334 | } | |
335 | return 0; | |
336 | } | |
337 | ||
806fb630 | 338 | static int perf_evlist__alloc_pollfd(struct perf_evlist *evlist) |
5c581041 | 339 | { |
b3a319d5 NK |
340 | int nr_cpus = cpu_map__nr(evlist->cpus); |
341 | int nr_threads = thread_map__nr(evlist->threads); | |
342 | int nfds = nr_cpus * nr_threads * evlist->nr_entries; | |
5c581041 ACM |
343 | evlist->pollfd = malloc(sizeof(struct pollfd) * nfds); |
344 | return evlist->pollfd != NULL ? 0 : -ENOMEM; | |
345 | } | |
70082dd9 ACM |
346 | |
347 | void perf_evlist__add_pollfd(struct perf_evlist *evlist, int fd) | |
348 | { | |
349 | fcntl(fd, F_SETFL, O_NONBLOCK); | |
350 | evlist->pollfd[evlist->nr_fds].fd = fd; | |
351 | evlist->pollfd[evlist->nr_fds].events = POLLIN; | |
352 | evlist->nr_fds++; | |
353 | } | |
70db7533 | 354 | |
a91e5431 ACM |
355 | static void perf_evlist__id_hash(struct perf_evlist *evlist, |
356 | struct perf_evsel *evsel, | |
357 | int cpu, int thread, u64 id) | |
3d3b5e95 ACM |
358 | { |
359 | int hash; | |
360 | struct perf_sample_id *sid = SID(evsel, cpu, thread); | |
361 | ||
362 | sid->id = id; | |
363 | sid->evsel = evsel; | |
364 | hash = hash_64(sid->id, PERF_EVLIST__HLIST_BITS); | |
365 | hlist_add_head(&sid->node, &evlist->heads[hash]); | |
366 | } | |
367 | ||
a91e5431 ACM |
368 | void perf_evlist__id_add(struct perf_evlist *evlist, struct perf_evsel *evsel, |
369 | int cpu, int thread, u64 id) | |
370 | { | |
371 | perf_evlist__id_hash(evlist, evsel, cpu, thread, id); | |
372 | evsel->id[evsel->ids++] = id; | |
373 | } | |
374 | ||
375 | static int perf_evlist__id_add_fd(struct perf_evlist *evlist, | |
376 | struct perf_evsel *evsel, | |
377 | int cpu, int thread, int fd) | |
f8a95309 | 378 | { |
f8a95309 | 379 | u64 read_data[4] = { 0, }; |
3d3b5e95 | 380 | int id_idx = 1; /* The first entry is the counter value */ |
e2b5abe0 JO |
381 | u64 id; |
382 | int ret; | |
383 | ||
384 | ret = ioctl(fd, PERF_EVENT_IOC_ID, &id); | |
385 | if (!ret) | |
386 | goto add; | |
387 | ||
388 | if (errno != ENOTTY) | |
389 | return -1; | |
390 | ||
391 | /* Legacy way to get event id.. All hail to old kernels! */ | |
f8a95309 | 392 | |
c4861afe JO |
393 | /* |
394 | * This way does not work with group format read, so bail | |
395 | * out in that case. | |
396 | */ | |
397 | if (perf_evlist__read_format(evlist) & PERF_FORMAT_GROUP) | |
398 | return -1; | |
399 | ||
f8a95309 ACM |
400 | if (!(evsel->attr.read_format & PERF_FORMAT_ID) || |
401 | read(fd, &read_data, sizeof(read_data)) == -1) | |
402 | return -1; | |
403 | ||
404 | if (evsel->attr.read_format & PERF_FORMAT_TOTAL_TIME_ENABLED) | |
405 | ++id_idx; | |
406 | if (evsel->attr.read_format & PERF_FORMAT_TOTAL_TIME_RUNNING) | |
407 | ++id_idx; | |
408 | ||
e2b5abe0 JO |
409 | id = read_data[id_idx]; |
410 | ||
411 | add: | |
412 | perf_evlist__id_add(evlist, evsel, cpu, thread, id); | |
f8a95309 ACM |
413 | return 0; |
414 | } | |
415 | ||
932a3594 | 416 | struct perf_sample_id *perf_evlist__id2sid(struct perf_evlist *evlist, u64 id) |
70db7533 ACM |
417 | { |
418 | struct hlist_head *head; | |
70db7533 ACM |
419 | struct perf_sample_id *sid; |
420 | int hash; | |
421 | ||
70db7533 ACM |
422 | hash = hash_64(id, PERF_EVLIST__HLIST_BITS); |
423 | head = &evlist->heads[hash]; | |
424 | ||
b67bfe0d | 425 | hlist_for_each_entry(sid, head, node) |
70db7533 | 426 | if (sid->id == id) |
932a3594 JO |
427 | return sid; |
428 | ||
429 | return NULL; | |
430 | } | |
431 | ||
432 | struct perf_evsel *perf_evlist__id2evsel(struct perf_evlist *evlist, u64 id) | |
433 | { | |
434 | struct perf_sample_id *sid; | |
435 | ||
436 | if (evlist->nr_entries == 1) | |
437 | return perf_evlist__first(evlist); | |
438 | ||
439 | sid = perf_evlist__id2sid(evlist, id); | |
440 | if (sid) | |
441 | return sid->evsel; | |
30e68bcc NK |
442 | |
443 | if (!perf_evlist__sample_id_all(evlist)) | |
0c21f736 | 444 | return perf_evlist__first(evlist); |
30e68bcc | 445 | |
70db7533 ACM |
446 | return NULL; |
447 | } | |
04391deb | 448 | |
75562573 AH |
449 | static int perf_evlist__event2id(struct perf_evlist *evlist, |
450 | union perf_event *event, u64 *id) | |
451 | { | |
452 | const u64 *array = event->sample.array; | |
453 | ssize_t n; | |
454 | ||
455 | n = (event->header.size - sizeof(event->header)) >> 3; | |
456 | ||
457 | if (event->header.type == PERF_RECORD_SAMPLE) { | |
458 | if (evlist->id_pos >= n) | |
459 | return -1; | |
460 | *id = array[evlist->id_pos]; | |
461 | } else { | |
462 | if (evlist->is_pos > n) | |
463 | return -1; | |
464 | n -= evlist->is_pos; | |
465 | *id = array[n]; | |
466 | } | |
467 | return 0; | |
468 | } | |
469 | ||
470 | static struct perf_evsel *perf_evlist__event2evsel(struct perf_evlist *evlist, | |
471 | union perf_event *event) | |
472 | { | |
98be6966 | 473 | struct perf_evsel *first = perf_evlist__first(evlist); |
75562573 AH |
474 | struct hlist_head *head; |
475 | struct perf_sample_id *sid; | |
476 | int hash; | |
477 | u64 id; | |
478 | ||
479 | if (evlist->nr_entries == 1) | |
98be6966 AH |
480 | return first; |
481 | ||
482 | if (!first->attr.sample_id_all && | |
483 | event->header.type != PERF_RECORD_SAMPLE) | |
484 | return first; | |
75562573 AH |
485 | |
486 | if (perf_evlist__event2id(evlist, event, &id)) | |
487 | return NULL; | |
488 | ||
489 | /* Synthesized events have an id of zero */ | |
490 | if (!id) | |
98be6966 | 491 | return first; |
75562573 AH |
492 | |
493 | hash = hash_64(id, PERF_EVLIST__HLIST_BITS); | |
494 | head = &evlist->heads[hash]; | |
495 | ||
496 | hlist_for_each_entry(sid, head, node) { | |
497 | if (sid->id == id) | |
498 | return sid->evsel; | |
499 | } | |
500 | return NULL; | |
501 | } | |
502 | ||
aece948f | 503 | union perf_event *perf_evlist__mmap_read(struct perf_evlist *evlist, int idx) |
04391deb | 504 | { |
aece948f | 505 | struct perf_mmap *md = &evlist->mmap[idx]; |
04391deb ACM |
506 | unsigned int head = perf_mmap__read_head(md); |
507 | unsigned int old = md->prev; | |
508 | unsigned char *data = md->base + page_size; | |
8115d60c | 509 | union perf_event *event = NULL; |
04391deb | 510 | |
7bb41152 | 511 | if (evlist->overwrite) { |
04391deb | 512 | /* |
7bb41152 ACM |
513 | * If we're further behind than half the buffer, there's a chance |
514 | * the writer will bite our tail and mess up the samples under us. | |
515 | * | |
516 | * If we somehow ended up ahead of the head, we got messed up. | |
517 | * | |
518 | * In either case, truncate and restart at head. | |
04391deb | 519 | */ |
7bb41152 ACM |
520 | int diff = head - old; |
521 | if (diff > md->mask / 2 || diff < 0) { | |
522 | fprintf(stderr, "WARNING: failed to keep up with mmap data.\n"); | |
523 | ||
524 | /* | |
525 | * head points to a known good entry, start there. | |
526 | */ | |
527 | old = head; | |
528 | } | |
04391deb ACM |
529 | } |
530 | ||
531 | if (old != head) { | |
532 | size_t size; | |
533 | ||
8115d60c | 534 | event = (union perf_event *)&data[old & md->mask]; |
04391deb ACM |
535 | size = event->header.size; |
536 | ||
537 | /* | |
538 | * Event straddles the mmap boundary -- header should always | |
539 | * be inside due to u64 alignment of output. | |
540 | */ | |
541 | if ((old & md->mask) + size != ((old + size) & md->mask)) { | |
542 | unsigned int offset = old; | |
543 | unsigned int len = min(sizeof(*event), size), cpy; | |
a65cb4b9 | 544 | void *dst = md->event_copy; |
04391deb ACM |
545 | |
546 | do { | |
547 | cpy = min(md->mask + 1 - (offset & md->mask), len); | |
548 | memcpy(dst, &data[offset & md->mask], cpy); | |
549 | offset += cpy; | |
550 | dst += cpy; | |
551 | len -= cpy; | |
552 | } while (len); | |
553 | ||
a65cb4b9 | 554 | event = (union perf_event *) md->event_copy; |
04391deb ACM |
555 | } |
556 | ||
557 | old += size; | |
558 | } | |
559 | ||
560 | md->prev = old; | |
7bb41152 | 561 | |
04391deb ACM |
562 | return event; |
563 | } | |
f8a95309 | 564 | |
8e50d384 ZZ |
565 | void perf_evlist__mmap_consume(struct perf_evlist *evlist, int idx) |
566 | { | |
567 | if (!evlist->overwrite) { | |
568 | struct perf_mmap *md = &evlist->mmap[idx]; | |
569 | unsigned int old = md->prev; | |
570 | ||
571 | perf_mmap__write_tail(md, old); | |
572 | } | |
573 | } | |
574 | ||
93edcbd9 AH |
575 | static void __perf_evlist__munmap(struct perf_evlist *evlist, int idx) |
576 | { | |
577 | if (evlist->mmap[idx].base != NULL) { | |
578 | munmap(evlist->mmap[idx].base, evlist->mmap_len); | |
579 | evlist->mmap[idx].base = NULL; | |
580 | } | |
581 | } | |
582 | ||
7e2ed097 | 583 | void perf_evlist__munmap(struct perf_evlist *evlist) |
f8a95309 | 584 | { |
aece948f | 585 | int i; |
f8a95309 | 586 | |
93edcbd9 AH |
587 | for (i = 0; i < evlist->nr_mmaps; i++) |
588 | __perf_evlist__munmap(evlist, i); | |
aece948f ACM |
589 | |
590 | free(evlist->mmap); | |
591 | evlist->mmap = NULL; | |
f8a95309 ACM |
592 | } |
593 | ||
806fb630 | 594 | static int perf_evlist__alloc_mmap(struct perf_evlist *evlist) |
f8a95309 | 595 | { |
a14bb7a6 | 596 | evlist->nr_mmaps = cpu_map__nr(evlist->cpus); |
ec1e7e43 | 597 | if (cpu_map__empty(evlist->cpus)) |
b3a319d5 | 598 | evlist->nr_mmaps = thread_map__nr(evlist->threads); |
aece948f | 599 | evlist->mmap = zalloc(evlist->nr_mmaps * sizeof(struct perf_mmap)); |
f8a95309 ACM |
600 | return evlist->mmap != NULL ? 0 : -ENOMEM; |
601 | } | |
602 | ||
bccdaba0 | 603 | static int __perf_evlist__mmap(struct perf_evlist *evlist, |
aece948f | 604 | int idx, int prot, int mask, int fd) |
f8a95309 | 605 | { |
aece948f ACM |
606 | evlist->mmap[idx].prev = 0; |
607 | evlist->mmap[idx].mask = mask; | |
608 | evlist->mmap[idx].base = mmap(NULL, evlist->mmap_len, prot, | |
f8a95309 | 609 | MAP_SHARED, fd, 0); |
301b195d | 610 | if (evlist->mmap[idx].base == MAP_FAILED) { |
02635965 AH |
611 | pr_debug2("failed to mmap perf event ring buffer, error %d\n", |
612 | errno); | |
301b195d | 613 | evlist->mmap[idx].base = NULL; |
f8a95309 | 614 | return -1; |
301b195d | 615 | } |
f8a95309 ACM |
616 | |
617 | perf_evlist__add_pollfd(evlist, fd); | |
618 | return 0; | |
619 | } | |
620 | ||
04e21314 AH |
621 | static int perf_evlist__mmap_per_evsel(struct perf_evlist *evlist, int idx, |
622 | int prot, int mask, int cpu, int thread, | |
623 | int *output) | |
aece948f ACM |
624 | { |
625 | struct perf_evsel *evsel; | |
04e21314 AH |
626 | |
627 | list_for_each_entry(evsel, &evlist->entries, node) { | |
628 | int fd = FD(evsel, cpu, thread); | |
629 | ||
630 | if (*output == -1) { | |
631 | *output = fd; | |
632 | if (__perf_evlist__mmap(evlist, idx, prot, mask, | |
633 | *output) < 0) | |
634 | return -1; | |
635 | } else { | |
636 | if (ioctl(fd, PERF_EVENT_IOC_SET_OUTPUT, *output) != 0) | |
637 | return -1; | |
638 | } | |
639 | ||
640 | if ((evsel->attr.read_format & PERF_FORMAT_ID) && | |
641 | perf_evlist__id_add_fd(evlist, evsel, cpu, thread, fd) < 0) | |
642 | return -1; | |
643 | } | |
644 | ||
645 | return 0; | |
646 | } | |
647 | ||
648 | static int perf_evlist__mmap_per_cpu(struct perf_evlist *evlist, int prot, | |
649 | int mask) | |
650 | { | |
aece948f | 651 | int cpu, thread; |
b3a319d5 NK |
652 | int nr_cpus = cpu_map__nr(evlist->cpus); |
653 | int nr_threads = thread_map__nr(evlist->threads); | |
aece948f | 654 | |
e3e1a54f | 655 | pr_debug2("perf event ring buffer mmapped per cpu\n"); |
b3a319d5 | 656 | for (cpu = 0; cpu < nr_cpus; cpu++) { |
aece948f ACM |
657 | int output = -1; |
658 | ||
b3a319d5 | 659 | for (thread = 0; thread < nr_threads; thread++) { |
04e21314 AH |
660 | if (perf_evlist__mmap_per_evsel(evlist, cpu, prot, mask, |
661 | cpu, thread, &output)) | |
662 | goto out_unmap; | |
aece948f ACM |
663 | } |
664 | } | |
665 | ||
666 | return 0; | |
667 | ||
668 | out_unmap: | |
93edcbd9 AH |
669 | for (cpu = 0; cpu < nr_cpus; cpu++) |
670 | __perf_evlist__munmap(evlist, cpu); | |
aece948f ACM |
671 | return -1; |
672 | } | |
673 | ||
04e21314 AH |
674 | static int perf_evlist__mmap_per_thread(struct perf_evlist *evlist, int prot, |
675 | int mask) | |
aece948f | 676 | { |
aece948f | 677 | int thread; |
b3a319d5 | 678 | int nr_threads = thread_map__nr(evlist->threads); |
aece948f | 679 | |
e3e1a54f | 680 | pr_debug2("perf event ring buffer mmapped per thread\n"); |
b3a319d5 | 681 | for (thread = 0; thread < nr_threads; thread++) { |
aece948f ACM |
682 | int output = -1; |
683 | ||
04e21314 AH |
684 | if (perf_evlist__mmap_per_evsel(evlist, thread, prot, mask, 0, |
685 | thread, &output)) | |
686 | goto out_unmap; | |
aece948f ACM |
687 | } |
688 | ||
689 | return 0; | |
690 | ||
691 | out_unmap: | |
93edcbd9 AH |
692 | for (thread = 0; thread < nr_threads; thread++) |
693 | __perf_evlist__munmap(evlist, thread); | |
aece948f ACM |
694 | return -1; |
695 | } | |
696 | ||
994a1f78 JO |
697 | static size_t perf_evlist__mmap_size(unsigned long pages) |
698 | { | |
699 | /* 512 kiB: default amount of unprivileged mlocked memory */ | |
700 | if (pages == UINT_MAX) | |
701 | pages = (512 * 1024) / page_size; | |
702 | else if (!is_power_of_2(pages)) | |
703 | return 0; | |
704 | ||
705 | return (pages + 1) * page_size; | |
706 | } | |
707 | ||
33c2dcfd DA |
708 | static long parse_pages_arg(const char *str, unsigned long min, |
709 | unsigned long max) | |
994a1f78 | 710 | { |
2fbe4abe | 711 | unsigned long pages, val; |
27050f53 JO |
712 | static struct parse_tag tags[] = { |
713 | { .tag = 'B', .mult = 1 }, | |
714 | { .tag = 'K', .mult = 1 << 10 }, | |
715 | { .tag = 'M', .mult = 1 << 20 }, | |
716 | { .tag = 'G', .mult = 1 << 30 }, | |
717 | { .tag = 0 }, | |
718 | }; | |
994a1f78 | 719 | |
8973504b | 720 | if (str == NULL) |
33c2dcfd | 721 | return -EINVAL; |
8973504b | 722 | |
27050f53 | 723 | val = parse_tag_value(str, tags); |
2fbe4abe | 724 | if (val != (unsigned long) -1) { |
27050f53 JO |
725 | /* we got file size value */ |
726 | pages = PERF_ALIGN(val, page_size) / page_size; | |
27050f53 JO |
727 | } else { |
728 | /* we got pages count value */ | |
729 | char *eptr; | |
730 | pages = strtoul(str, &eptr, 10); | |
33c2dcfd DA |
731 | if (*eptr != '\0') |
732 | return -EINVAL; | |
994a1f78 JO |
733 | } |
734 | ||
2bcab6c1 | 735 | if (pages == 0 && min == 0) { |
33c2dcfd DA |
736 | /* leave number of pages at 0 */ |
737 | } else if (pages < (1UL << 31) && !is_power_of_2(pages)) { | |
738 | /* round pages up to next power of 2 */ | |
9639837e DA |
739 | pages = next_pow2(pages); |
740 | pr_info("rounding mmap pages size to %lu bytes (%lu pages)\n", | |
741 | pages * page_size, pages); | |
2fbe4abe AH |
742 | } |
743 | ||
33c2dcfd DA |
744 | if (pages > max) |
745 | return -EINVAL; | |
746 | ||
747 | return pages; | |
748 | } | |
749 | ||
750 | int perf_evlist__parse_mmap_pages(const struct option *opt, const char *str, | |
751 | int unset __maybe_unused) | |
752 | { | |
753 | unsigned int *mmap_pages = opt->value; | |
754 | unsigned long max = UINT_MAX; | |
755 | long pages; | |
756 | ||
f5ae9c42 | 757 | if (max > SIZE_MAX / page_size) |
33c2dcfd DA |
758 | max = SIZE_MAX / page_size; |
759 | ||
760 | pages = parse_pages_arg(str, 1, max); | |
761 | if (pages < 0) { | |
762 | pr_err("Invalid argument for --mmap_pages/-m\n"); | |
994a1f78 JO |
763 | return -1; |
764 | } | |
765 | ||
766 | *mmap_pages = pages; | |
767 | return 0; | |
768 | } | |
769 | ||
c83fa7f2 AH |
770 | /** |
771 | * perf_evlist__mmap - Create mmaps to receive events. | |
772 | * @evlist: list of events | |
773 | * @pages: map length in pages | |
774 | * @overwrite: overwrite older events? | |
f8a95309 | 775 | * |
c83fa7f2 AH |
776 | * If @overwrite is %false the user needs to signal event consumption using |
777 | * perf_mmap__write_tail(). Using perf_evlist__mmap_read() does this | |
778 | * automatically. | |
7e2ed097 | 779 | * |
c83fa7f2 | 780 | * Return: %0 on success, negative error code otherwise. |
f8a95309 | 781 | */ |
50a682ce ACM |
782 | int perf_evlist__mmap(struct perf_evlist *evlist, unsigned int pages, |
783 | bool overwrite) | |
f8a95309 | 784 | { |
aece948f | 785 | struct perf_evsel *evsel; |
7e2ed097 ACM |
786 | const struct cpu_map *cpus = evlist->cpus; |
787 | const struct thread_map *threads = evlist->threads; | |
50a682ce ACM |
788 | int prot = PROT_READ | (overwrite ? 0 : PROT_WRITE), mask; |
789 | ||
7e2ed097 | 790 | if (evlist->mmap == NULL && perf_evlist__alloc_mmap(evlist) < 0) |
f8a95309 ACM |
791 | return -ENOMEM; |
792 | ||
7e2ed097 | 793 | if (evlist->pollfd == NULL && perf_evlist__alloc_pollfd(evlist) < 0) |
f8a95309 ACM |
794 | return -ENOMEM; |
795 | ||
796 | evlist->overwrite = overwrite; | |
994a1f78 | 797 | evlist->mmap_len = perf_evlist__mmap_size(pages); |
2af68ef5 | 798 | pr_debug("mmap size %zuB\n", evlist->mmap_len); |
994a1f78 | 799 | mask = evlist->mmap_len - page_size - 1; |
f8a95309 ACM |
800 | |
801 | list_for_each_entry(evsel, &evlist->entries, node) { | |
802 | if ((evsel->attr.read_format & PERF_FORMAT_ID) && | |
a91e5431 | 803 | evsel->sample_id == NULL && |
a14bb7a6 | 804 | perf_evsel__alloc_id(evsel, cpu_map__nr(cpus), threads->nr) < 0) |
f8a95309 | 805 | return -ENOMEM; |
f8a95309 ACM |
806 | } |
807 | ||
ec1e7e43 | 808 | if (cpu_map__empty(cpus)) |
aece948f | 809 | return perf_evlist__mmap_per_thread(evlist, prot, mask); |
f8a95309 | 810 | |
aece948f | 811 | return perf_evlist__mmap_per_cpu(evlist, prot, mask); |
f8a95309 | 812 | } |
7e2ed097 | 813 | |
602ad878 | 814 | int perf_evlist__create_maps(struct perf_evlist *evlist, struct target *target) |
7e2ed097 | 815 | { |
b809ac10 NK |
816 | evlist->threads = thread_map__new_str(target->pid, target->tid, |
817 | target->uid); | |
7e2ed097 ACM |
818 | |
819 | if (evlist->threads == NULL) | |
820 | return -1; | |
821 | ||
9c105fbc | 822 | if (target__uses_dummy_map(target)) |
d1cb9fce | 823 | evlist->cpus = cpu_map__dummy_new(); |
879d77d0 NK |
824 | else |
825 | evlist->cpus = cpu_map__new(target->cpu_list); | |
7e2ed097 ACM |
826 | |
827 | if (evlist->cpus == NULL) | |
828 | goto out_delete_threads; | |
829 | ||
830 | return 0; | |
831 | ||
832 | out_delete_threads: | |
833 | thread_map__delete(evlist->threads); | |
834 | return -1; | |
835 | } | |
836 | ||
837 | void perf_evlist__delete_maps(struct perf_evlist *evlist) | |
838 | { | |
839 | cpu_map__delete(evlist->cpus); | |
840 | thread_map__delete(evlist->threads); | |
841 | evlist->cpus = NULL; | |
842 | evlist->threads = NULL; | |
843 | } | |
0a102479 | 844 | |
1491a632 | 845 | int perf_evlist__apply_filters(struct perf_evlist *evlist) |
0a102479 | 846 | { |
0a102479 | 847 | struct perf_evsel *evsel; |
745cefc5 ACM |
848 | int err = 0; |
849 | const int ncpus = cpu_map__nr(evlist->cpus), | |
b3a319d5 | 850 | nthreads = thread_map__nr(evlist->threads); |
0a102479 FW |
851 | |
852 | list_for_each_entry(evsel, &evlist->entries, node) { | |
745cefc5 | 853 | if (evsel->filter == NULL) |
0a102479 | 854 | continue; |
745cefc5 ACM |
855 | |
856 | err = perf_evsel__set_filter(evsel, ncpus, nthreads, evsel->filter); | |
857 | if (err) | |
858 | break; | |
0a102479 FW |
859 | } |
860 | ||
745cefc5 ACM |
861 | return err; |
862 | } | |
863 | ||
864 | int perf_evlist__set_filter(struct perf_evlist *evlist, const char *filter) | |
865 | { | |
866 | struct perf_evsel *evsel; | |
867 | int err = 0; | |
868 | const int ncpus = cpu_map__nr(evlist->cpus), | |
b3a319d5 | 869 | nthreads = thread_map__nr(evlist->threads); |
745cefc5 ACM |
870 | |
871 | list_for_each_entry(evsel, &evlist->entries, node) { | |
872 | err = perf_evsel__set_filter(evsel, ncpus, nthreads, filter); | |
873 | if (err) | |
874 | break; | |
875 | } | |
876 | ||
877 | return err; | |
0a102479 | 878 | } |
74429964 | 879 | |
0c21f736 | 880 | bool perf_evlist__valid_sample_type(struct perf_evlist *evlist) |
74429964 | 881 | { |
75562573 | 882 | struct perf_evsel *pos; |
c2a70653 | 883 | |
75562573 AH |
884 | if (evlist->nr_entries == 1) |
885 | return true; | |
886 | ||
887 | if (evlist->id_pos < 0 || evlist->is_pos < 0) | |
888 | return false; | |
889 | ||
890 | list_for_each_entry(pos, &evlist->entries, node) { | |
891 | if (pos->id_pos != evlist->id_pos || | |
892 | pos->is_pos != evlist->is_pos) | |
c2a70653 | 893 | return false; |
74429964 FW |
894 | } |
895 | ||
c2a70653 | 896 | return true; |
74429964 FW |
897 | } |
898 | ||
75562573 | 899 | u64 __perf_evlist__combined_sample_type(struct perf_evlist *evlist) |
c2a70653 | 900 | { |
75562573 AH |
901 | struct perf_evsel *evsel; |
902 | ||
903 | if (evlist->combined_sample_type) | |
904 | return evlist->combined_sample_type; | |
905 | ||
906 | list_for_each_entry(evsel, &evlist->entries, node) | |
907 | evlist->combined_sample_type |= evsel->attr.sample_type; | |
908 | ||
909 | return evlist->combined_sample_type; | |
910 | } | |
911 | ||
912 | u64 perf_evlist__combined_sample_type(struct perf_evlist *evlist) | |
913 | { | |
914 | evlist->combined_sample_type = 0; | |
915 | return __perf_evlist__combined_sample_type(evlist); | |
c2a70653 ACM |
916 | } |
917 | ||
9ede473c JO |
918 | bool perf_evlist__valid_read_format(struct perf_evlist *evlist) |
919 | { | |
920 | struct perf_evsel *first = perf_evlist__first(evlist), *pos = first; | |
921 | u64 read_format = first->attr.read_format; | |
922 | u64 sample_type = first->attr.sample_type; | |
923 | ||
924 | list_for_each_entry_continue(pos, &evlist->entries, node) { | |
925 | if (read_format != pos->attr.read_format) | |
926 | return false; | |
927 | } | |
928 | ||
929 | /* PERF_SAMPLE_READ imples PERF_FORMAT_ID. */ | |
930 | if ((sample_type & PERF_SAMPLE_READ) && | |
931 | !(read_format & PERF_FORMAT_ID)) { | |
932 | return false; | |
933 | } | |
934 | ||
935 | return true; | |
936 | } | |
937 | ||
938 | u64 perf_evlist__read_format(struct perf_evlist *evlist) | |
939 | { | |
940 | struct perf_evsel *first = perf_evlist__first(evlist); | |
941 | return first->attr.read_format; | |
942 | } | |
943 | ||
0c21f736 | 944 | u16 perf_evlist__id_hdr_size(struct perf_evlist *evlist) |
81e36bff | 945 | { |
0c21f736 | 946 | struct perf_evsel *first = perf_evlist__first(evlist); |
81e36bff ACM |
947 | struct perf_sample *data; |
948 | u64 sample_type; | |
949 | u16 size = 0; | |
950 | ||
81e36bff ACM |
951 | if (!first->attr.sample_id_all) |
952 | goto out; | |
953 | ||
954 | sample_type = first->attr.sample_type; | |
955 | ||
956 | if (sample_type & PERF_SAMPLE_TID) | |
957 | size += sizeof(data->tid) * 2; | |
958 | ||
959 | if (sample_type & PERF_SAMPLE_TIME) | |
960 | size += sizeof(data->time); | |
961 | ||
962 | if (sample_type & PERF_SAMPLE_ID) | |
963 | size += sizeof(data->id); | |
964 | ||
965 | if (sample_type & PERF_SAMPLE_STREAM_ID) | |
966 | size += sizeof(data->stream_id); | |
967 | ||
968 | if (sample_type & PERF_SAMPLE_CPU) | |
969 | size += sizeof(data->cpu) * 2; | |
75562573 AH |
970 | |
971 | if (sample_type & PERF_SAMPLE_IDENTIFIER) | |
972 | size += sizeof(data->id); | |
81e36bff ACM |
973 | out: |
974 | return size; | |
975 | } | |
976 | ||
0c21f736 | 977 | bool perf_evlist__valid_sample_id_all(struct perf_evlist *evlist) |
74429964 | 978 | { |
0c21f736 | 979 | struct perf_evsel *first = perf_evlist__first(evlist), *pos = first; |
c2a70653 ACM |
980 | |
981 | list_for_each_entry_continue(pos, &evlist->entries, node) { | |
982 | if (first->attr.sample_id_all != pos->attr.sample_id_all) | |
983 | return false; | |
74429964 FW |
984 | } |
985 | ||
c2a70653 ACM |
986 | return true; |
987 | } | |
988 | ||
0c21f736 | 989 | bool perf_evlist__sample_id_all(struct perf_evlist *evlist) |
c2a70653 | 990 | { |
0c21f736 | 991 | struct perf_evsel *first = perf_evlist__first(evlist); |
c2a70653 | 992 | return first->attr.sample_id_all; |
74429964 | 993 | } |
81cce8de ACM |
994 | |
995 | void perf_evlist__set_selected(struct perf_evlist *evlist, | |
996 | struct perf_evsel *evsel) | |
997 | { | |
998 | evlist->selected = evsel; | |
999 | } | |
727ab04e | 1000 | |
a74b4b66 NK |
1001 | void perf_evlist__close(struct perf_evlist *evlist) |
1002 | { | |
1003 | struct perf_evsel *evsel; | |
1004 | int ncpus = cpu_map__nr(evlist->cpus); | |
1005 | int nthreads = thread_map__nr(evlist->threads); | |
1006 | ||
1007 | list_for_each_entry_reverse(evsel, &evlist->entries, node) | |
1008 | perf_evsel__close(evsel, ncpus, nthreads); | |
1009 | } | |
1010 | ||
6a4bb04c | 1011 | int perf_evlist__open(struct perf_evlist *evlist) |
727ab04e | 1012 | { |
6a4bb04c | 1013 | struct perf_evsel *evsel; |
a74b4b66 | 1014 | int err; |
727ab04e | 1015 | |
733cd2fe AH |
1016 | perf_evlist__update_id_pos(evlist); |
1017 | ||
727ab04e | 1018 | list_for_each_entry(evsel, &evlist->entries, node) { |
6a4bb04c | 1019 | err = perf_evsel__open(evsel, evlist->cpus, evlist->threads); |
727ab04e ACM |
1020 | if (err < 0) |
1021 | goto out_err; | |
1022 | } | |
1023 | ||
1024 | return 0; | |
1025 | out_err: | |
a74b4b66 | 1026 | perf_evlist__close(evlist); |
41c21a68 | 1027 | errno = -err; |
727ab04e ACM |
1028 | return err; |
1029 | } | |
35b9d88e | 1030 | |
602ad878 | 1031 | int perf_evlist__prepare_workload(struct perf_evlist *evlist, struct target *target, |
55e162ea NK |
1032 | const char *argv[], bool pipe_output, |
1033 | bool want_signal) | |
35b9d88e ACM |
1034 | { |
1035 | int child_ready_pipe[2], go_pipe[2]; | |
1036 | char bf; | |
1037 | ||
1038 | if (pipe(child_ready_pipe) < 0) { | |
1039 | perror("failed to create 'ready' pipe"); | |
1040 | return -1; | |
1041 | } | |
1042 | ||
1043 | if (pipe(go_pipe) < 0) { | |
1044 | perror("failed to create 'go' pipe"); | |
1045 | goto out_close_ready_pipe; | |
1046 | } | |
1047 | ||
1048 | evlist->workload.pid = fork(); | |
1049 | if (evlist->workload.pid < 0) { | |
1050 | perror("failed to fork"); | |
1051 | goto out_close_pipes; | |
1052 | } | |
1053 | ||
1054 | if (!evlist->workload.pid) { | |
119fa3c9 | 1055 | if (pipe_output) |
35b9d88e ACM |
1056 | dup2(2, 1); |
1057 | ||
0817df08 DA |
1058 | signal(SIGTERM, SIG_DFL); |
1059 | ||
35b9d88e ACM |
1060 | close(child_ready_pipe[0]); |
1061 | close(go_pipe[1]); | |
1062 | fcntl(go_pipe[0], F_SETFD, FD_CLOEXEC); | |
1063 | ||
35b9d88e ACM |
1064 | /* |
1065 | * Tell the parent we're ready to go | |
1066 | */ | |
1067 | close(child_ready_pipe[1]); | |
1068 | ||
1069 | /* | |
1070 | * Wait until the parent tells us to go. | |
1071 | */ | |
1072 | if (read(go_pipe[0], &bf, 1) == -1) | |
1073 | perror("unable to read pipe"); | |
1074 | ||
1075 | execvp(argv[0], (char **)argv); | |
1076 | ||
1077 | perror(argv[0]); | |
55e162ea NK |
1078 | if (want_signal) |
1079 | kill(getppid(), SIGUSR1); | |
35b9d88e ACM |
1080 | exit(-1); |
1081 | } | |
1082 | ||
602ad878 | 1083 | if (target__none(target)) |
35b9d88e ACM |
1084 | evlist->threads->map[0] = evlist->workload.pid; |
1085 | ||
1086 | close(child_ready_pipe[1]); | |
1087 | close(go_pipe[0]); | |
1088 | /* | |
1089 | * wait for child to settle | |
1090 | */ | |
1091 | if (read(child_ready_pipe[0], &bf, 1) == -1) { | |
1092 | perror("unable to read pipe"); | |
1093 | goto out_close_pipes; | |
1094 | } | |
1095 | ||
bcf3145f | 1096 | fcntl(go_pipe[1], F_SETFD, FD_CLOEXEC); |
35b9d88e ACM |
1097 | evlist->workload.cork_fd = go_pipe[1]; |
1098 | close(child_ready_pipe[0]); | |
1099 | return 0; | |
1100 | ||
1101 | out_close_pipes: | |
1102 | close(go_pipe[0]); | |
1103 | close(go_pipe[1]); | |
1104 | out_close_ready_pipe: | |
1105 | close(child_ready_pipe[0]); | |
1106 | close(child_ready_pipe[1]); | |
1107 | return -1; | |
1108 | } | |
1109 | ||
1110 | int perf_evlist__start_workload(struct perf_evlist *evlist) | |
1111 | { | |
1112 | if (evlist->workload.cork_fd > 0) { | |
b3824404 | 1113 | char bf = 0; |
bcf3145f | 1114 | int ret; |
35b9d88e ACM |
1115 | /* |
1116 | * Remove the cork, let it rip! | |
1117 | */ | |
bcf3145f NK |
1118 | ret = write(evlist->workload.cork_fd, &bf, 1); |
1119 | if (ret < 0) | |
1120 | perror("enable to write to pipe"); | |
1121 | ||
1122 | close(evlist->workload.cork_fd); | |
1123 | return ret; | |
35b9d88e ACM |
1124 | } |
1125 | ||
1126 | return 0; | |
1127 | } | |
cb0b29e0 | 1128 | |
a3f698fe | 1129 | int perf_evlist__parse_sample(struct perf_evlist *evlist, union perf_event *event, |
0807d2d8 | 1130 | struct perf_sample *sample) |
cb0b29e0 | 1131 | { |
75562573 AH |
1132 | struct perf_evsel *evsel = perf_evlist__event2evsel(evlist, event); |
1133 | ||
1134 | if (!evsel) | |
1135 | return -EFAULT; | |
0807d2d8 | 1136 | return perf_evsel__parse_sample(evsel, event, sample); |
cb0b29e0 | 1137 | } |
78f067b3 ACM |
1138 | |
1139 | size_t perf_evlist__fprintf(struct perf_evlist *evlist, FILE *fp) | |
1140 | { | |
1141 | struct perf_evsel *evsel; | |
1142 | size_t printed = 0; | |
1143 | ||
1144 | list_for_each_entry(evsel, &evlist->entries, node) { | |
1145 | printed += fprintf(fp, "%s%s", evsel->idx ? ", " : "", | |
1146 | perf_evsel__name(evsel)); | |
1147 | } | |
1148 | ||
b2222139 | 1149 | return printed + fprintf(fp, "\n"); |
78f067b3 | 1150 | } |
6ef068cb ACM |
1151 | |
1152 | int perf_evlist__strerror_tp(struct perf_evlist *evlist __maybe_unused, | |
1153 | int err, char *buf, size_t size) | |
1154 | { | |
1155 | char sbuf[128]; | |
1156 | ||
1157 | switch (err) { | |
1158 | case ENOENT: | |
1159 | scnprintf(buf, size, "%s", | |
1160 | "Error:\tUnable to find debugfs\n" | |
1161 | "Hint:\tWas your kernel was compiled with debugfs support?\n" | |
1162 | "Hint:\tIs the debugfs filesystem mounted?\n" | |
1163 | "Hint:\tTry 'sudo mount -t debugfs nodev /sys/kernel/debug'"); | |
1164 | break; | |
1165 | case EACCES: | |
1166 | scnprintf(buf, size, | |
1167 | "Error:\tNo permissions to read %s/tracing/events/raw_syscalls\n" | |
1168 | "Hint:\tTry 'sudo mount -o remount,mode=755 %s'\n", | |
1169 | debugfs_mountpoint, debugfs_mountpoint); | |
1170 | break; | |
1171 | default: | |
1172 | scnprintf(buf, size, "%s", strerror_r(err, sbuf, sizeof(sbuf))); | |
1173 | break; | |
1174 | } | |
1175 | ||
1176 | return 0; | |
1177 | } | |
a8f23d8f ACM |
1178 | |
1179 | int perf_evlist__strerror_open(struct perf_evlist *evlist __maybe_unused, | |
1180 | int err, char *buf, size_t size) | |
1181 | { | |
1182 | int printed, value; | |
1183 | char sbuf[128], *emsg = strerror_r(err, sbuf, sizeof(sbuf)); | |
1184 | ||
1185 | switch (err) { | |
1186 | case EACCES: | |
1187 | case EPERM: | |
1188 | printed = scnprintf(buf, size, | |
1189 | "Error:\t%s.\n" | |
1190 | "Hint:\tCheck /proc/sys/kernel/perf_event_paranoid setting.", emsg); | |
1191 | ||
1192 | if (filename__read_int("/proc/sys/kernel/perf_event_paranoid", &value)) | |
1193 | break; | |
1194 | ||
1195 | printed += scnprintf(buf + printed, size - printed, "\nHint:\t"); | |
1196 | ||
1197 | if (value >= 2) { | |
1198 | printed += scnprintf(buf + printed, size - printed, | |
1199 | "For your workloads it needs to be <= 1\nHint:\t"); | |
1200 | } | |
1201 | printed += scnprintf(buf + printed, size - printed, | |
1202 | "For system wide tracing it needs to be set to -1"); | |
1203 | ||
1204 | printed += scnprintf(buf + printed, size - printed, | |
1205 | ".\nHint:\tThe current value is %d.", value); | |
1206 | break; | |
1207 | default: | |
1208 | scnprintf(buf, size, "%s", emsg); | |
1209 | break; | |
1210 | } | |
1211 | ||
1212 | return 0; | |
1213 | } |