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" |
956fa571 | 10 | #include <api/fs/fs.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> | |
0389cd1f | 27 | #include <linux/log2.h> |
8dd2a131 | 28 | #include <linux/err.h> |
70db7533 | 29 | |
e4b356b5 ACM |
30 | static void perf_evlist__mmap_put(struct perf_evlist *evlist, int idx); |
31 | static void __perf_evlist__munmap(struct perf_evlist *evlist, int idx); | |
32 | ||
f8a95309 | 33 | #define FD(e, x, y) (*(int *)xyarray__entry(e->fd, x, y)) |
a91e5431 | 34 | #define SID(e, x, y) xyarray__entry(e->sample_id, x, y) |
f8a95309 | 35 | |
7e2ed097 ACM |
36 | void perf_evlist__init(struct perf_evlist *evlist, struct cpu_map *cpus, |
37 | struct thread_map *threads) | |
ef1d1af2 ACM |
38 | { |
39 | int i; | |
40 | ||
41 | for (i = 0; i < PERF_EVLIST__HLIST_SIZE; ++i) | |
42 | INIT_HLIST_HEAD(&evlist->heads[i]); | |
43 | INIT_LIST_HEAD(&evlist->entries); | |
7e2ed097 | 44 | perf_evlist__set_maps(evlist, cpus, threads); |
1b85337d | 45 | fdarray__init(&evlist->pollfd, 64); |
35b9d88e | 46 | evlist->workload.pid = -1; |
ef1d1af2 ACM |
47 | } |
48 | ||
334fe7a3 | 49 | struct perf_evlist *perf_evlist__new(void) |
361c99a6 ACM |
50 | { |
51 | struct perf_evlist *evlist = zalloc(sizeof(*evlist)); | |
52 | ||
ef1d1af2 | 53 | if (evlist != NULL) |
334fe7a3 | 54 | perf_evlist__init(evlist, NULL, NULL); |
361c99a6 ACM |
55 | |
56 | return evlist; | |
57 | } | |
58 | ||
b22d54b0 JO |
59 | struct perf_evlist *perf_evlist__new_default(void) |
60 | { | |
61 | struct perf_evlist *evlist = perf_evlist__new(); | |
62 | ||
63 | if (evlist && perf_evlist__add_default(evlist)) { | |
64 | perf_evlist__delete(evlist); | |
65 | evlist = NULL; | |
66 | } | |
67 | ||
68 | return evlist; | |
69 | } | |
70 | ||
75562573 AH |
71 | /** |
72 | * perf_evlist__set_id_pos - set the positions of event ids. | |
73 | * @evlist: selected event list | |
74 | * | |
75 | * Events with compatible sample types all have the same id_pos | |
76 | * and is_pos. For convenience, put a copy on evlist. | |
77 | */ | |
78 | void perf_evlist__set_id_pos(struct perf_evlist *evlist) | |
79 | { | |
80 | struct perf_evsel *first = perf_evlist__first(evlist); | |
81 | ||
82 | evlist->id_pos = first->id_pos; | |
83 | evlist->is_pos = first->is_pos; | |
84 | } | |
85 | ||
733cd2fe AH |
86 | static void perf_evlist__update_id_pos(struct perf_evlist *evlist) |
87 | { | |
88 | struct perf_evsel *evsel; | |
89 | ||
0050f7aa | 90 | evlist__for_each(evlist, evsel) |
733cd2fe AH |
91 | perf_evsel__calc_id_pos(evsel); |
92 | ||
93 | perf_evlist__set_id_pos(evlist); | |
94 | } | |
95 | ||
361c99a6 ACM |
96 | static void perf_evlist__purge(struct perf_evlist *evlist) |
97 | { | |
98 | struct perf_evsel *pos, *n; | |
99 | ||
0050f7aa | 100 | evlist__for_each_safe(evlist, n, pos) { |
361c99a6 | 101 | list_del_init(&pos->node); |
d49e4695 | 102 | pos->evlist = NULL; |
361c99a6 ACM |
103 | perf_evsel__delete(pos); |
104 | } | |
105 | ||
106 | evlist->nr_entries = 0; | |
107 | } | |
108 | ||
ef1d1af2 | 109 | void perf_evlist__exit(struct perf_evlist *evlist) |
361c99a6 | 110 | { |
04662523 | 111 | zfree(&evlist->mmap); |
1b85337d | 112 | fdarray__exit(&evlist->pollfd); |
ef1d1af2 ACM |
113 | } |
114 | ||
115 | void perf_evlist__delete(struct perf_evlist *evlist) | |
116 | { | |
983874d1 | 117 | perf_evlist__munmap(evlist); |
f26e1c7c | 118 | perf_evlist__close(evlist); |
f30a79b0 | 119 | cpu_map__put(evlist->cpus); |
186fbb74 | 120 | thread_map__put(evlist->threads); |
03ad9747 ACM |
121 | evlist->cpus = NULL; |
122 | evlist->threads = NULL; | |
ef1d1af2 ACM |
123 | perf_evlist__purge(evlist); |
124 | perf_evlist__exit(evlist); | |
361c99a6 ACM |
125 | free(evlist); |
126 | } | |
127 | ||
adc0c3e8 AH |
128 | static void __perf_evlist__propagate_maps(struct perf_evlist *evlist, |
129 | struct perf_evsel *evsel) | |
130 | { | |
131 | /* | |
132 | * We already have cpus for evsel (via PMU sysfs) so | |
133 | * keep it, if there's no target cpu list defined. | |
134 | */ | |
135 | if (!evsel->own_cpus || evlist->has_user_cpus) { | |
136 | cpu_map__put(evsel->cpus); | |
137 | evsel->cpus = cpu_map__get(evlist->cpus); | |
138 | } else if (evsel->cpus != evsel->own_cpus) { | |
139 | cpu_map__put(evsel->cpus); | |
140 | evsel->cpus = cpu_map__get(evsel->own_cpus); | |
141 | } | |
142 | ||
143 | thread_map__put(evsel->threads); | |
144 | evsel->threads = thread_map__get(evlist->threads); | |
145 | } | |
146 | ||
147 | static void perf_evlist__propagate_maps(struct perf_evlist *evlist) | |
148 | { | |
149 | struct perf_evsel *evsel; | |
150 | ||
151 | evlist__for_each(evlist, evsel) | |
152 | __perf_evlist__propagate_maps(evlist, evsel); | |
153 | } | |
154 | ||
361c99a6 ACM |
155 | void perf_evlist__add(struct perf_evlist *evlist, struct perf_evsel *entry) |
156 | { | |
d49e4695 | 157 | entry->evlist = evlist; |
361c99a6 | 158 | list_add_tail(&entry->node, &evlist->entries); |
ef503831 | 159 | entry->idx = evlist->nr_entries; |
60b0896c | 160 | entry->tracking = !entry->idx; |
ef503831 | 161 | |
75562573 AH |
162 | if (!evlist->nr_entries++) |
163 | perf_evlist__set_id_pos(evlist); | |
44c42d71 AH |
164 | |
165 | __perf_evlist__propagate_maps(evlist, entry); | |
361c99a6 ACM |
166 | } |
167 | ||
4768230a AH |
168 | void perf_evlist__remove(struct perf_evlist *evlist, struct perf_evsel *evsel) |
169 | { | |
170 | evsel->evlist = NULL; | |
171 | list_del_init(&evsel->node); | |
172 | evlist->nr_entries -= 1; | |
173 | } | |
174 | ||
0529bc1f | 175 | void perf_evlist__splice_list_tail(struct perf_evlist *evlist, |
f114d6ef | 176 | struct list_head *list) |
50d08e47 | 177 | { |
f114d6ef | 178 | struct perf_evsel *evsel, *temp; |
75562573 | 179 | |
f114d6ef AH |
180 | __evlist__for_each_safe(list, temp, evsel) { |
181 | list_del_init(&evsel->node); | |
182 | perf_evlist__add(evlist, evsel); | |
183 | } | |
50d08e47 ACM |
184 | } |
185 | ||
63dab225 ACM |
186 | void __perf_evlist__set_leader(struct list_head *list) |
187 | { | |
188 | struct perf_evsel *evsel, *leader; | |
189 | ||
190 | leader = list_entry(list->next, struct perf_evsel, node); | |
97f63e4a NK |
191 | evsel = list_entry(list->prev, struct perf_evsel, node); |
192 | ||
193 | leader->nr_members = evsel->idx - leader->idx + 1; | |
63dab225 | 194 | |
0050f7aa | 195 | __evlist__for_each(list, evsel) { |
74b2133d | 196 | evsel->leader = leader; |
63dab225 ACM |
197 | } |
198 | } | |
199 | ||
200 | void perf_evlist__set_leader(struct perf_evlist *evlist) | |
6a4bb04c | 201 | { |
97f63e4a NK |
202 | if (evlist->nr_entries) { |
203 | evlist->nr_groups = evlist->nr_entries > 1 ? 1 : 0; | |
63dab225 | 204 | __perf_evlist__set_leader(&evlist->entries); |
97f63e4a | 205 | } |
6a4bb04c JO |
206 | } |
207 | ||
45cf6c33 | 208 | void perf_event_attr__set_max_precise_ip(struct perf_event_attr *attr) |
7f8d1ade ACM |
209 | { |
210 | attr->precise_ip = 3; | |
211 | ||
212 | while (attr->precise_ip != 0) { | |
213 | int fd = sys_perf_event_open(attr, 0, -1, -1, 0); | |
214 | if (fd != -1) { | |
215 | close(fd); | |
216 | break; | |
217 | } | |
218 | --attr->precise_ip; | |
219 | } | |
220 | } | |
221 | ||
361c99a6 ACM |
222 | int perf_evlist__add_default(struct perf_evlist *evlist) |
223 | { | |
224 | struct perf_event_attr attr = { | |
225 | .type = PERF_TYPE_HARDWARE, | |
226 | .config = PERF_COUNT_HW_CPU_CYCLES, | |
227 | }; | |
1aed2671 JR |
228 | struct perf_evsel *evsel; |
229 | ||
230 | event_attr_init(&attr); | |
361c99a6 | 231 | |
7f8d1ade ACM |
232 | perf_event_attr__set_max_precise_ip(&attr); |
233 | ||
ef503831 | 234 | evsel = perf_evsel__new(&attr); |
361c99a6 | 235 | if (evsel == NULL) |
cc2d86b0 SE |
236 | goto error; |
237 | ||
7f8d1ade ACM |
238 | /* use asprintf() because free(evsel) assumes name is allocated */ |
239 | if (asprintf(&evsel->name, "cycles%.*s", | |
240 | attr.precise_ip ? attr.precise_ip + 1 : 0, ":ppp") < 0) | |
cc2d86b0 | 241 | goto error_free; |
361c99a6 ACM |
242 | |
243 | perf_evlist__add(evlist, evsel); | |
244 | return 0; | |
cc2d86b0 SE |
245 | error_free: |
246 | perf_evsel__delete(evsel); | |
247 | error: | |
248 | return -ENOMEM; | |
361c99a6 | 249 | } |
5c581041 | 250 | |
e60fc847 ACM |
251 | static int perf_evlist__add_attrs(struct perf_evlist *evlist, |
252 | struct perf_event_attr *attrs, size_t nr_attrs) | |
50d08e47 ACM |
253 | { |
254 | struct perf_evsel *evsel, *n; | |
255 | LIST_HEAD(head); | |
256 | size_t i; | |
257 | ||
258 | for (i = 0; i < nr_attrs; i++) { | |
ef503831 | 259 | evsel = perf_evsel__new_idx(attrs + i, evlist->nr_entries + i); |
50d08e47 ACM |
260 | if (evsel == NULL) |
261 | goto out_delete_partial_list; | |
262 | list_add_tail(&evsel->node, &head); | |
263 | } | |
264 | ||
f114d6ef | 265 | perf_evlist__splice_list_tail(evlist, &head); |
50d08e47 ACM |
266 | |
267 | return 0; | |
268 | ||
269 | out_delete_partial_list: | |
0050f7aa | 270 | __evlist__for_each_safe(&head, n, evsel) |
50d08e47 ACM |
271 | perf_evsel__delete(evsel); |
272 | return -1; | |
273 | } | |
274 | ||
79695e1b ACM |
275 | int __perf_evlist__add_default_attrs(struct perf_evlist *evlist, |
276 | struct perf_event_attr *attrs, size_t nr_attrs) | |
277 | { | |
278 | size_t i; | |
279 | ||
280 | for (i = 0; i < nr_attrs; i++) | |
281 | event_attr_init(attrs + i); | |
282 | ||
283 | return perf_evlist__add_attrs(evlist, attrs, nr_attrs); | |
284 | } | |
285 | ||
da378962 ACM |
286 | struct perf_evsel * |
287 | perf_evlist__find_tracepoint_by_id(struct perf_evlist *evlist, int id) | |
ee29be62 ACM |
288 | { |
289 | struct perf_evsel *evsel; | |
290 | ||
0050f7aa | 291 | evlist__for_each(evlist, evsel) { |
ee29be62 ACM |
292 | if (evsel->attr.type == PERF_TYPE_TRACEPOINT && |
293 | (int)evsel->attr.config == id) | |
294 | return evsel; | |
295 | } | |
296 | ||
297 | return NULL; | |
298 | } | |
299 | ||
a2f2804a DA |
300 | struct perf_evsel * |
301 | perf_evlist__find_tracepoint_by_name(struct perf_evlist *evlist, | |
302 | const char *name) | |
303 | { | |
304 | struct perf_evsel *evsel; | |
305 | ||
0050f7aa | 306 | evlist__for_each(evlist, evsel) { |
a2f2804a DA |
307 | if ((evsel->attr.type == PERF_TYPE_TRACEPOINT) && |
308 | (strcmp(evsel->name, name) == 0)) | |
309 | return evsel; | |
310 | } | |
311 | ||
312 | return NULL; | |
313 | } | |
314 | ||
39876e7d ACM |
315 | int perf_evlist__add_newtp(struct perf_evlist *evlist, |
316 | const char *sys, const char *name, void *handler) | |
317 | { | |
ef503831 | 318 | struct perf_evsel *evsel = perf_evsel__newtp(sys, name); |
39876e7d | 319 | |
8dd2a131 | 320 | if (IS_ERR(evsel)) |
39876e7d ACM |
321 | return -1; |
322 | ||
744a9719 | 323 | evsel->handler = handler; |
39876e7d ACM |
324 | perf_evlist__add(evlist, evsel); |
325 | return 0; | |
326 | } | |
327 | ||
bf8e8f4b AH |
328 | static int perf_evlist__nr_threads(struct perf_evlist *evlist, |
329 | struct perf_evsel *evsel) | |
330 | { | |
331 | if (evsel->system_wide) | |
332 | return 1; | |
333 | else | |
334 | return thread_map__nr(evlist->threads); | |
335 | } | |
336 | ||
4152ab37 ACM |
337 | void perf_evlist__disable(struct perf_evlist *evlist) |
338 | { | |
339 | int cpu, thread; | |
340 | struct perf_evsel *pos; | |
b3a319d5 | 341 | int nr_cpus = cpu_map__nr(evlist->cpus); |
bf8e8f4b | 342 | int nr_threads; |
4152ab37 | 343 | |
b3a319d5 | 344 | for (cpu = 0; cpu < nr_cpus; cpu++) { |
0050f7aa | 345 | evlist__for_each(evlist, pos) { |
395c3070 | 346 | if (!perf_evsel__is_group_leader(pos) || !pos->fd) |
3fe4430d | 347 | continue; |
bf8e8f4b | 348 | nr_threads = perf_evlist__nr_threads(evlist, pos); |
b3a319d5 | 349 | for (thread = 0; thread < nr_threads; thread++) |
55da8005 NK |
350 | ioctl(FD(pos, cpu, thread), |
351 | PERF_EVENT_IOC_DISABLE, 0); | |
4152ab37 ACM |
352 | } |
353 | } | |
2b56bcfb ACM |
354 | |
355 | evlist->enabled = false; | |
4152ab37 ACM |
356 | } |
357 | ||
764e16a3 DA |
358 | void perf_evlist__enable(struct perf_evlist *evlist) |
359 | { | |
360 | int cpu, thread; | |
361 | struct perf_evsel *pos; | |
b3a319d5 | 362 | int nr_cpus = cpu_map__nr(evlist->cpus); |
bf8e8f4b | 363 | int nr_threads; |
764e16a3 | 364 | |
b3a319d5 | 365 | for (cpu = 0; cpu < nr_cpus; cpu++) { |
0050f7aa | 366 | evlist__for_each(evlist, pos) { |
395c3070 | 367 | if (!perf_evsel__is_group_leader(pos) || !pos->fd) |
3fe4430d | 368 | continue; |
bf8e8f4b | 369 | nr_threads = perf_evlist__nr_threads(evlist, pos); |
b3a319d5 | 370 | for (thread = 0; thread < nr_threads; thread++) |
55da8005 NK |
371 | ioctl(FD(pos, cpu, thread), |
372 | PERF_EVENT_IOC_ENABLE, 0); | |
764e16a3 DA |
373 | } |
374 | } | |
2b56bcfb ACM |
375 | |
376 | evlist->enabled = true; | |
377 | } | |
378 | ||
379 | void perf_evlist__toggle_enable(struct perf_evlist *evlist) | |
380 | { | |
381 | (evlist->enabled ? perf_evlist__disable : perf_evlist__enable)(evlist); | |
764e16a3 DA |
382 | } |
383 | ||
395c3070 AH |
384 | int perf_evlist__disable_event(struct perf_evlist *evlist, |
385 | struct perf_evsel *evsel) | |
386 | { | |
387 | int cpu, thread, err; | |
bf8e8f4b AH |
388 | int nr_cpus = cpu_map__nr(evlist->cpus); |
389 | int nr_threads = perf_evlist__nr_threads(evlist, evsel); | |
395c3070 AH |
390 | |
391 | if (!evsel->fd) | |
392 | return 0; | |
393 | ||
bf8e8f4b AH |
394 | for (cpu = 0; cpu < nr_cpus; cpu++) { |
395 | for (thread = 0; thread < nr_threads; thread++) { | |
395c3070 AH |
396 | err = ioctl(FD(evsel, cpu, thread), |
397 | PERF_EVENT_IOC_DISABLE, 0); | |
398 | if (err) | |
399 | return err; | |
400 | } | |
401 | } | |
402 | return 0; | |
403 | } | |
404 | ||
405 | int perf_evlist__enable_event(struct perf_evlist *evlist, | |
406 | struct perf_evsel *evsel) | |
407 | { | |
408 | int cpu, thread, err; | |
bf8e8f4b AH |
409 | int nr_cpus = cpu_map__nr(evlist->cpus); |
410 | int nr_threads = perf_evlist__nr_threads(evlist, evsel); | |
395c3070 AH |
411 | |
412 | if (!evsel->fd) | |
413 | return -EINVAL; | |
414 | ||
bf8e8f4b AH |
415 | for (cpu = 0; cpu < nr_cpus; cpu++) { |
416 | for (thread = 0; thread < nr_threads; thread++) { | |
395c3070 AH |
417 | err = ioctl(FD(evsel, cpu, thread), |
418 | PERF_EVENT_IOC_ENABLE, 0); | |
419 | if (err) | |
420 | return err; | |
421 | } | |
422 | } | |
423 | return 0; | |
424 | } | |
425 | ||
1c65056c AH |
426 | static int perf_evlist__enable_event_cpu(struct perf_evlist *evlist, |
427 | struct perf_evsel *evsel, int cpu) | |
428 | { | |
429 | int thread, err; | |
430 | int nr_threads = perf_evlist__nr_threads(evlist, evsel); | |
431 | ||
432 | if (!evsel->fd) | |
433 | return -EINVAL; | |
434 | ||
435 | for (thread = 0; thread < nr_threads; thread++) { | |
436 | err = ioctl(FD(evsel, cpu, thread), | |
437 | PERF_EVENT_IOC_ENABLE, 0); | |
438 | if (err) | |
439 | return err; | |
440 | } | |
441 | return 0; | |
442 | } | |
443 | ||
444 | static int perf_evlist__enable_event_thread(struct perf_evlist *evlist, | |
445 | struct perf_evsel *evsel, | |
446 | int thread) | |
447 | { | |
448 | int cpu, err; | |
449 | int nr_cpus = cpu_map__nr(evlist->cpus); | |
450 | ||
451 | if (!evsel->fd) | |
452 | return -EINVAL; | |
453 | ||
454 | for (cpu = 0; cpu < nr_cpus; cpu++) { | |
455 | err = ioctl(FD(evsel, cpu, thread), PERF_EVENT_IOC_ENABLE, 0); | |
456 | if (err) | |
457 | return err; | |
458 | } | |
459 | return 0; | |
460 | } | |
461 | ||
462 | int perf_evlist__enable_event_idx(struct perf_evlist *evlist, | |
463 | struct perf_evsel *evsel, int idx) | |
464 | { | |
465 | bool per_cpu_mmaps = !cpu_map__empty(evlist->cpus); | |
466 | ||
467 | if (per_cpu_mmaps) | |
468 | return perf_evlist__enable_event_cpu(evlist, evsel, idx); | |
469 | else | |
470 | return perf_evlist__enable_event_thread(evlist, evsel, idx); | |
471 | } | |
472 | ||
ad6765dd | 473 | int perf_evlist__alloc_pollfd(struct perf_evlist *evlist) |
5c581041 | 474 | { |
b3a319d5 NK |
475 | int nr_cpus = cpu_map__nr(evlist->cpus); |
476 | int nr_threads = thread_map__nr(evlist->threads); | |
bf8e8f4b AH |
477 | int nfds = 0; |
478 | struct perf_evsel *evsel; | |
479 | ||
cba9b847 | 480 | evlist__for_each(evlist, evsel) { |
bf8e8f4b AH |
481 | if (evsel->system_wide) |
482 | nfds += nr_cpus; | |
483 | else | |
484 | nfds += nr_cpus * nr_threads; | |
485 | } | |
486 | ||
1b85337d ACM |
487 | if (fdarray__available_entries(&evlist->pollfd) < nfds && |
488 | fdarray__grow(&evlist->pollfd, nfds) < 0) | |
ad6765dd ACM |
489 | return -ENOMEM; |
490 | ||
491 | return 0; | |
5c581041 | 492 | } |
70082dd9 | 493 | |
e4b356b5 ACM |
494 | static int __perf_evlist__add_pollfd(struct perf_evlist *evlist, int fd, int idx) |
495 | { | |
496 | int pos = fdarray__add(&evlist->pollfd, fd, POLLIN | POLLERR | POLLHUP); | |
497 | /* | |
498 | * Save the idx so that when we filter out fds POLLHUP'ed we can | |
499 | * close the associated evlist->mmap[] entry. | |
500 | */ | |
501 | if (pos >= 0) { | |
502 | evlist->pollfd.priv[pos].idx = idx; | |
503 | ||
504 | fcntl(fd, F_SETFL, O_NONBLOCK); | |
505 | } | |
506 | ||
507 | return pos; | |
508 | } | |
509 | ||
ad6765dd | 510 | int perf_evlist__add_pollfd(struct perf_evlist *evlist, int fd) |
70082dd9 | 511 | { |
e4b356b5 ACM |
512 | return __perf_evlist__add_pollfd(evlist, fd, -1); |
513 | } | |
514 | ||
515 | static void perf_evlist__munmap_filtered(struct fdarray *fda, int fd) | |
516 | { | |
517 | struct perf_evlist *evlist = container_of(fda, struct perf_evlist, pollfd); | |
1b85337d | 518 | |
e4b356b5 | 519 | perf_evlist__mmap_put(evlist, fda->priv[fd].idx); |
70082dd9 | 520 | } |
70db7533 | 521 | |
1ddec7f0 ACM |
522 | int perf_evlist__filter_pollfd(struct perf_evlist *evlist, short revents_and_mask) |
523 | { | |
e4b356b5 ACM |
524 | return fdarray__filter(&evlist->pollfd, revents_and_mask, |
525 | perf_evlist__munmap_filtered); | |
1ddec7f0 ACM |
526 | } |
527 | ||
f66a889d ACM |
528 | int perf_evlist__poll(struct perf_evlist *evlist, int timeout) |
529 | { | |
1b85337d | 530 | return fdarray__poll(&evlist->pollfd, timeout); |
f66a889d ACM |
531 | } |
532 | ||
a91e5431 ACM |
533 | static void perf_evlist__id_hash(struct perf_evlist *evlist, |
534 | struct perf_evsel *evsel, | |
535 | int cpu, int thread, u64 id) | |
3d3b5e95 ACM |
536 | { |
537 | int hash; | |
538 | struct perf_sample_id *sid = SID(evsel, cpu, thread); | |
539 | ||
540 | sid->id = id; | |
541 | sid->evsel = evsel; | |
542 | hash = hash_64(sid->id, PERF_EVLIST__HLIST_BITS); | |
543 | hlist_add_head(&sid->node, &evlist->heads[hash]); | |
544 | } | |
545 | ||
a91e5431 ACM |
546 | void perf_evlist__id_add(struct perf_evlist *evlist, struct perf_evsel *evsel, |
547 | int cpu, int thread, u64 id) | |
548 | { | |
549 | perf_evlist__id_hash(evlist, evsel, cpu, thread, id); | |
550 | evsel->id[evsel->ids++] = id; | |
551 | } | |
552 | ||
553 | static int perf_evlist__id_add_fd(struct perf_evlist *evlist, | |
554 | struct perf_evsel *evsel, | |
555 | int cpu, int thread, int fd) | |
f8a95309 | 556 | { |
f8a95309 | 557 | u64 read_data[4] = { 0, }; |
3d3b5e95 | 558 | int id_idx = 1; /* The first entry is the counter value */ |
e2b5abe0 JO |
559 | u64 id; |
560 | int ret; | |
561 | ||
562 | ret = ioctl(fd, PERF_EVENT_IOC_ID, &id); | |
563 | if (!ret) | |
564 | goto add; | |
565 | ||
566 | if (errno != ENOTTY) | |
567 | return -1; | |
568 | ||
569 | /* Legacy way to get event id.. All hail to old kernels! */ | |
f8a95309 | 570 | |
c4861afe JO |
571 | /* |
572 | * This way does not work with group format read, so bail | |
573 | * out in that case. | |
574 | */ | |
575 | if (perf_evlist__read_format(evlist) & PERF_FORMAT_GROUP) | |
576 | return -1; | |
577 | ||
f8a95309 ACM |
578 | if (!(evsel->attr.read_format & PERF_FORMAT_ID) || |
579 | read(fd, &read_data, sizeof(read_data)) == -1) | |
580 | return -1; | |
581 | ||
582 | if (evsel->attr.read_format & PERF_FORMAT_TOTAL_TIME_ENABLED) | |
583 | ++id_idx; | |
584 | if (evsel->attr.read_format & PERF_FORMAT_TOTAL_TIME_RUNNING) | |
585 | ++id_idx; | |
586 | ||
e2b5abe0 JO |
587 | id = read_data[id_idx]; |
588 | ||
589 | add: | |
590 | perf_evlist__id_add(evlist, evsel, cpu, thread, id); | |
f8a95309 ACM |
591 | return 0; |
592 | } | |
593 | ||
3c659eed AH |
594 | static void perf_evlist__set_sid_idx(struct perf_evlist *evlist, |
595 | struct perf_evsel *evsel, int idx, int cpu, | |
596 | int thread) | |
597 | { | |
598 | struct perf_sample_id *sid = SID(evsel, cpu, thread); | |
599 | sid->idx = idx; | |
600 | if (evlist->cpus && cpu >= 0) | |
601 | sid->cpu = evlist->cpus->map[cpu]; | |
602 | else | |
603 | sid->cpu = -1; | |
604 | if (!evsel->system_wide && evlist->threads && thread >= 0) | |
e13798c7 | 605 | sid->tid = thread_map__pid(evlist->threads, thread); |
3c659eed AH |
606 | else |
607 | sid->tid = -1; | |
608 | } | |
609 | ||
932a3594 | 610 | struct perf_sample_id *perf_evlist__id2sid(struct perf_evlist *evlist, u64 id) |
70db7533 ACM |
611 | { |
612 | struct hlist_head *head; | |
70db7533 ACM |
613 | struct perf_sample_id *sid; |
614 | int hash; | |
615 | ||
70db7533 ACM |
616 | hash = hash_64(id, PERF_EVLIST__HLIST_BITS); |
617 | head = &evlist->heads[hash]; | |
618 | ||
b67bfe0d | 619 | hlist_for_each_entry(sid, head, node) |
70db7533 | 620 | if (sid->id == id) |
932a3594 JO |
621 | return sid; |
622 | ||
623 | return NULL; | |
624 | } | |
625 | ||
626 | struct perf_evsel *perf_evlist__id2evsel(struct perf_evlist *evlist, u64 id) | |
627 | { | |
628 | struct perf_sample_id *sid; | |
629 | ||
05169df5 | 630 | if (evlist->nr_entries == 1 || !id) |
932a3594 JO |
631 | return perf_evlist__first(evlist); |
632 | ||
633 | sid = perf_evlist__id2sid(evlist, id); | |
634 | if (sid) | |
635 | return sid->evsel; | |
30e68bcc NK |
636 | |
637 | if (!perf_evlist__sample_id_all(evlist)) | |
0c21f736 | 638 | return perf_evlist__first(evlist); |
30e68bcc | 639 | |
70db7533 ACM |
640 | return NULL; |
641 | } | |
04391deb | 642 | |
dddcf6ab AH |
643 | struct perf_evsel *perf_evlist__id2evsel_strict(struct perf_evlist *evlist, |
644 | u64 id) | |
645 | { | |
646 | struct perf_sample_id *sid; | |
647 | ||
648 | if (!id) | |
649 | return NULL; | |
650 | ||
651 | sid = perf_evlist__id2sid(evlist, id); | |
652 | if (sid) | |
653 | return sid->evsel; | |
654 | ||
655 | return NULL; | |
656 | } | |
657 | ||
75562573 AH |
658 | static int perf_evlist__event2id(struct perf_evlist *evlist, |
659 | union perf_event *event, u64 *id) | |
660 | { | |
661 | const u64 *array = event->sample.array; | |
662 | ssize_t n; | |
663 | ||
664 | n = (event->header.size - sizeof(event->header)) >> 3; | |
665 | ||
666 | if (event->header.type == PERF_RECORD_SAMPLE) { | |
667 | if (evlist->id_pos >= n) | |
668 | return -1; | |
669 | *id = array[evlist->id_pos]; | |
670 | } else { | |
671 | if (evlist->is_pos > n) | |
672 | return -1; | |
673 | n -= evlist->is_pos; | |
674 | *id = array[n]; | |
675 | } | |
676 | return 0; | |
677 | } | |
678 | ||
679 | static struct perf_evsel *perf_evlist__event2evsel(struct perf_evlist *evlist, | |
680 | union perf_event *event) | |
681 | { | |
98be6966 | 682 | struct perf_evsel *first = perf_evlist__first(evlist); |
75562573 AH |
683 | struct hlist_head *head; |
684 | struct perf_sample_id *sid; | |
685 | int hash; | |
686 | u64 id; | |
687 | ||
688 | if (evlist->nr_entries == 1) | |
98be6966 AH |
689 | return first; |
690 | ||
691 | if (!first->attr.sample_id_all && | |
692 | event->header.type != PERF_RECORD_SAMPLE) | |
693 | return first; | |
75562573 AH |
694 | |
695 | if (perf_evlist__event2id(evlist, event, &id)) | |
696 | return NULL; | |
697 | ||
698 | /* Synthesized events have an id of zero */ | |
699 | if (!id) | |
98be6966 | 700 | return first; |
75562573 AH |
701 | |
702 | hash = hash_64(id, PERF_EVLIST__HLIST_BITS); | |
703 | head = &evlist->heads[hash]; | |
704 | ||
705 | hlist_for_each_entry(sid, head, node) { | |
706 | if (sid->id == id) | |
707 | return sid->evsel; | |
708 | } | |
709 | return NULL; | |
710 | } | |
711 | ||
aece948f | 712 | union perf_event *perf_evlist__mmap_read(struct perf_evlist *evlist, int idx) |
04391deb | 713 | { |
aece948f | 714 | struct perf_mmap *md = &evlist->mmap[idx]; |
7951722d | 715 | u64 head; |
7b8283b5 | 716 | u64 old = md->prev; |
04391deb | 717 | unsigned char *data = md->base + page_size; |
8115d60c | 718 | union perf_event *event = NULL; |
04391deb | 719 | |
7951722d SB |
720 | /* |
721 | * Check if event was unmapped due to a POLLHUP/POLLERR. | |
722 | */ | |
723 | if (!atomic_read(&md->refcnt)) | |
724 | return NULL; | |
725 | ||
726 | head = perf_mmap__read_head(md); | |
7bb41152 | 727 | if (evlist->overwrite) { |
04391deb | 728 | /* |
7bb41152 ACM |
729 | * If we're further behind than half the buffer, there's a chance |
730 | * the writer will bite our tail and mess up the samples under us. | |
731 | * | |
732 | * If we somehow ended up ahead of the head, we got messed up. | |
733 | * | |
734 | * In either case, truncate and restart at head. | |
04391deb | 735 | */ |
7bb41152 ACM |
736 | int diff = head - old; |
737 | if (diff > md->mask / 2 || diff < 0) { | |
738 | fprintf(stderr, "WARNING: failed to keep up with mmap data.\n"); | |
739 | ||
740 | /* | |
741 | * head points to a known good entry, start there. | |
742 | */ | |
743 | old = head; | |
744 | } | |
04391deb ACM |
745 | } |
746 | ||
747 | if (old != head) { | |
748 | size_t size; | |
749 | ||
8115d60c | 750 | event = (union perf_event *)&data[old & md->mask]; |
04391deb ACM |
751 | size = event->header.size; |
752 | ||
753 | /* | |
754 | * Event straddles the mmap boundary -- header should always | |
755 | * be inside due to u64 alignment of output. | |
756 | */ | |
757 | if ((old & md->mask) + size != ((old + size) & md->mask)) { | |
758 | unsigned int offset = old; | |
759 | unsigned int len = min(sizeof(*event), size), cpy; | |
a65cb4b9 | 760 | void *dst = md->event_copy; |
04391deb ACM |
761 | |
762 | do { | |
763 | cpy = min(md->mask + 1 - (offset & md->mask), len); | |
764 | memcpy(dst, &data[offset & md->mask], cpy); | |
765 | offset += cpy; | |
766 | dst += cpy; | |
767 | len -= cpy; | |
768 | } while (len); | |
769 | ||
a65cb4b9 | 770 | event = (union perf_event *) md->event_copy; |
04391deb ACM |
771 | } |
772 | ||
773 | old += size; | |
774 | } | |
775 | ||
776 | md->prev = old; | |
7bb41152 | 777 | |
04391deb ACM |
778 | return event; |
779 | } | |
f8a95309 | 780 | |
82396986 ACM |
781 | static bool perf_mmap__empty(struct perf_mmap *md) |
782 | { | |
b72e74d1 | 783 | return perf_mmap__read_head(md) == md->prev && !md->auxtrace_mmap.base; |
82396986 ACM |
784 | } |
785 | ||
786 | static void perf_evlist__mmap_get(struct perf_evlist *evlist, int idx) | |
787 | { | |
7143849a | 788 | atomic_inc(&evlist->mmap[idx].refcnt); |
82396986 ACM |
789 | } |
790 | ||
791 | static void perf_evlist__mmap_put(struct perf_evlist *evlist, int idx) | |
792 | { | |
7143849a | 793 | BUG_ON(atomic_read(&evlist->mmap[idx].refcnt) == 0); |
82396986 | 794 | |
7143849a | 795 | if (atomic_dec_and_test(&evlist->mmap[idx].refcnt)) |
82396986 ACM |
796 | __perf_evlist__munmap(evlist, idx); |
797 | } | |
798 | ||
8e50d384 ZZ |
799 | void perf_evlist__mmap_consume(struct perf_evlist *evlist, int idx) |
800 | { | |
82396986 ACM |
801 | struct perf_mmap *md = &evlist->mmap[idx]; |
802 | ||
8e50d384 | 803 | if (!evlist->overwrite) { |
7b8283b5 | 804 | u64 old = md->prev; |
8e50d384 ZZ |
805 | |
806 | perf_mmap__write_tail(md, old); | |
807 | } | |
82396986 | 808 | |
7143849a | 809 | if (atomic_read(&md->refcnt) == 1 && perf_mmap__empty(md)) |
82396986 | 810 | perf_evlist__mmap_put(evlist, idx); |
8e50d384 ZZ |
811 | } |
812 | ||
718c602d AH |
813 | int __weak auxtrace_mmap__mmap(struct auxtrace_mmap *mm __maybe_unused, |
814 | struct auxtrace_mmap_params *mp __maybe_unused, | |
815 | void *userpg __maybe_unused, | |
816 | int fd __maybe_unused) | |
817 | { | |
818 | return 0; | |
819 | } | |
820 | ||
821 | void __weak auxtrace_mmap__munmap(struct auxtrace_mmap *mm __maybe_unused) | |
822 | { | |
823 | } | |
824 | ||
825 | void __weak auxtrace_mmap_params__init( | |
826 | struct auxtrace_mmap_params *mp __maybe_unused, | |
827 | off_t auxtrace_offset __maybe_unused, | |
828 | unsigned int auxtrace_pages __maybe_unused, | |
829 | bool auxtrace_overwrite __maybe_unused) | |
830 | { | |
831 | } | |
832 | ||
833 | void __weak auxtrace_mmap_params__set_idx( | |
834 | struct auxtrace_mmap_params *mp __maybe_unused, | |
835 | struct perf_evlist *evlist __maybe_unused, | |
836 | int idx __maybe_unused, | |
837 | bool per_cpu __maybe_unused) | |
838 | { | |
839 | } | |
840 | ||
93edcbd9 AH |
841 | static void __perf_evlist__munmap(struct perf_evlist *evlist, int idx) |
842 | { | |
843 | if (evlist->mmap[idx].base != NULL) { | |
844 | munmap(evlist->mmap[idx].base, evlist->mmap_len); | |
845 | evlist->mmap[idx].base = NULL; | |
7143849a | 846 | atomic_set(&evlist->mmap[idx].refcnt, 0); |
93edcbd9 | 847 | } |
718c602d | 848 | auxtrace_mmap__munmap(&evlist->mmap[idx].auxtrace_mmap); |
93edcbd9 AH |
849 | } |
850 | ||
7e2ed097 | 851 | void perf_evlist__munmap(struct perf_evlist *evlist) |
f8a95309 | 852 | { |
aece948f | 853 | int i; |
f8a95309 | 854 | |
983874d1 ACM |
855 | if (evlist->mmap == NULL) |
856 | return; | |
857 | ||
93edcbd9 AH |
858 | for (i = 0; i < evlist->nr_mmaps; i++) |
859 | __perf_evlist__munmap(evlist, i); | |
aece948f | 860 | |
04662523 | 861 | zfree(&evlist->mmap); |
f8a95309 ACM |
862 | } |
863 | ||
806fb630 | 864 | static int perf_evlist__alloc_mmap(struct perf_evlist *evlist) |
f8a95309 | 865 | { |
a14bb7a6 | 866 | evlist->nr_mmaps = cpu_map__nr(evlist->cpus); |
ec1e7e43 | 867 | if (cpu_map__empty(evlist->cpus)) |
b3a319d5 | 868 | evlist->nr_mmaps = thread_map__nr(evlist->threads); |
aece948f | 869 | evlist->mmap = zalloc(evlist->nr_mmaps * sizeof(struct perf_mmap)); |
f8a95309 ACM |
870 | return evlist->mmap != NULL ? 0 : -ENOMEM; |
871 | } | |
872 | ||
a8a8f3eb AH |
873 | struct mmap_params { |
874 | int prot; | |
875 | int mask; | |
718c602d | 876 | struct auxtrace_mmap_params auxtrace_mp; |
a8a8f3eb AH |
877 | }; |
878 | ||
879 | static int __perf_evlist__mmap(struct perf_evlist *evlist, int idx, | |
880 | struct mmap_params *mp, int fd) | |
f8a95309 | 881 | { |
82396986 ACM |
882 | /* |
883 | * The last one will be done at perf_evlist__mmap_consume(), so that we | |
884 | * make sure we don't prevent tools from consuming every last event in | |
885 | * the ring buffer. | |
886 | * | |
887 | * I.e. we can get the POLLHUP meaning that the fd doesn't exist | |
888 | * anymore, but the last events for it are still in the ring buffer, | |
889 | * waiting to be consumed. | |
890 | * | |
891 | * Tools can chose to ignore this at their own discretion, but the | |
892 | * evlist layer can't just drop it when filtering events in | |
893 | * perf_evlist__filter_pollfd(). | |
894 | */ | |
7143849a | 895 | atomic_set(&evlist->mmap[idx].refcnt, 2); |
aece948f | 896 | evlist->mmap[idx].prev = 0; |
a8a8f3eb AH |
897 | evlist->mmap[idx].mask = mp->mask; |
898 | evlist->mmap[idx].base = mmap(NULL, evlist->mmap_len, mp->prot, | |
f8a95309 | 899 | MAP_SHARED, fd, 0); |
301b195d | 900 | if (evlist->mmap[idx].base == MAP_FAILED) { |
02635965 AH |
901 | pr_debug2("failed to mmap perf event ring buffer, error %d\n", |
902 | errno); | |
301b195d | 903 | evlist->mmap[idx].base = NULL; |
f8a95309 | 904 | return -1; |
301b195d | 905 | } |
ad6765dd | 906 | |
718c602d AH |
907 | if (auxtrace_mmap__mmap(&evlist->mmap[idx].auxtrace_mmap, |
908 | &mp->auxtrace_mp, evlist->mmap[idx].base, fd)) | |
909 | return -1; | |
910 | ||
f8a95309 ACM |
911 | return 0; |
912 | } | |
913 | ||
04e21314 | 914 | static int perf_evlist__mmap_per_evsel(struct perf_evlist *evlist, int idx, |
a8a8f3eb AH |
915 | struct mmap_params *mp, int cpu, |
916 | int thread, int *output) | |
aece948f ACM |
917 | { |
918 | struct perf_evsel *evsel; | |
04e21314 | 919 | |
0050f7aa | 920 | evlist__for_each(evlist, evsel) { |
bf8e8f4b AH |
921 | int fd; |
922 | ||
923 | if (evsel->system_wide && thread) | |
924 | continue; | |
925 | ||
926 | fd = FD(evsel, cpu, thread); | |
04e21314 AH |
927 | |
928 | if (*output == -1) { | |
929 | *output = fd; | |
a8a8f3eb | 930 | if (__perf_evlist__mmap(evlist, idx, mp, *output) < 0) |
04e21314 AH |
931 | return -1; |
932 | } else { | |
933 | if (ioctl(fd, PERF_EVENT_IOC_SET_OUTPUT, *output) != 0) | |
934 | return -1; | |
82396986 ACM |
935 | |
936 | perf_evlist__mmap_get(evlist, idx); | |
04e21314 AH |
937 | } |
938 | ||
f90d194a AH |
939 | /* |
940 | * The system_wide flag causes a selected event to be opened | |
941 | * always without a pid. Consequently it will never get a | |
942 | * POLLHUP, but it is used for tracking in combination with | |
943 | * other events, so it should not need to be polled anyway. | |
944 | * Therefore don't add it for polling. | |
945 | */ | |
946 | if (!evsel->system_wide && | |
947 | __perf_evlist__add_pollfd(evlist, fd, idx) < 0) { | |
82396986 | 948 | perf_evlist__mmap_put(evlist, idx); |
ad6765dd | 949 | return -1; |
82396986 | 950 | } |
033fa713 | 951 | |
3c659eed AH |
952 | if (evsel->attr.read_format & PERF_FORMAT_ID) { |
953 | if (perf_evlist__id_add_fd(evlist, evsel, cpu, thread, | |
954 | fd) < 0) | |
955 | return -1; | |
956 | perf_evlist__set_sid_idx(evlist, evsel, idx, cpu, | |
957 | thread); | |
958 | } | |
04e21314 AH |
959 | } |
960 | ||
961 | return 0; | |
962 | } | |
963 | ||
a8a8f3eb AH |
964 | static int perf_evlist__mmap_per_cpu(struct perf_evlist *evlist, |
965 | struct mmap_params *mp) | |
04e21314 | 966 | { |
aece948f | 967 | int cpu, thread; |
b3a319d5 NK |
968 | int nr_cpus = cpu_map__nr(evlist->cpus); |
969 | int nr_threads = thread_map__nr(evlist->threads); | |
aece948f | 970 | |
e3e1a54f | 971 | pr_debug2("perf event ring buffer mmapped per cpu\n"); |
b3a319d5 | 972 | for (cpu = 0; cpu < nr_cpus; cpu++) { |
aece948f ACM |
973 | int output = -1; |
974 | ||
718c602d AH |
975 | auxtrace_mmap_params__set_idx(&mp->auxtrace_mp, evlist, cpu, |
976 | true); | |
977 | ||
b3a319d5 | 978 | for (thread = 0; thread < nr_threads; thread++) { |
a8a8f3eb AH |
979 | if (perf_evlist__mmap_per_evsel(evlist, cpu, mp, cpu, |
980 | thread, &output)) | |
04e21314 | 981 | goto out_unmap; |
aece948f ACM |
982 | } |
983 | } | |
984 | ||
985 | return 0; | |
986 | ||
987 | out_unmap: | |
93edcbd9 AH |
988 | for (cpu = 0; cpu < nr_cpus; cpu++) |
989 | __perf_evlist__munmap(evlist, cpu); | |
aece948f ACM |
990 | return -1; |
991 | } | |
992 | ||
a8a8f3eb AH |
993 | static int perf_evlist__mmap_per_thread(struct perf_evlist *evlist, |
994 | struct mmap_params *mp) | |
aece948f | 995 | { |
aece948f | 996 | int thread; |
b3a319d5 | 997 | int nr_threads = thread_map__nr(evlist->threads); |
aece948f | 998 | |
e3e1a54f | 999 | pr_debug2("perf event ring buffer mmapped per thread\n"); |
b3a319d5 | 1000 | for (thread = 0; thread < nr_threads; thread++) { |
aece948f ACM |
1001 | int output = -1; |
1002 | ||
718c602d AH |
1003 | auxtrace_mmap_params__set_idx(&mp->auxtrace_mp, evlist, thread, |
1004 | false); | |
1005 | ||
a8a8f3eb AH |
1006 | if (perf_evlist__mmap_per_evsel(evlist, thread, mp, 0, thread, |
1007 | &output)) | |
04e21314 | 1008 | goto out_unmap; |
aece948f ACM |
1009 | } |
1010 | ||
1011 | return 0; | |
1012 | ||
1013 | out_unmap: | |
93edcbd9 AH |
1014 | for (thread = 0; thread < nr_threads; thread++) |
1015 | __perf_evlist__munmap(evlist, thread); | |
aece948f ACM |
1016 | return -1; |
1017 | } | |
1018 | ||
994a1f78 JO |
1019 | static size_t perf_evlist__mmap_size(unsigned long pages) |
1020 | { | |
8185e881 ACM |
1021 | if (pages == UINT_MAX) { |
1022 | int max; | |
1023 | ||
1024 | if (sysctl__read_int("kernel/perf_event_mlock_kb", &max) < 0) { | |
1025 | /* | |
1026 | * Pick a once upon a time good value, i.e. things look | |
1027 | * strange since we can't read a sysctl value, but lets not | |
1028 | * die yet... | |
1029 | */ | |
1030 | max = 512; | |
1031 | } else { | |
1032 | max -= (page_size / 1024); | |
1033 | } | |
1034 | ||
1035 | pages = (max * 1024) / page_size; | |
1be300f4 ACM |
1036 | if (!is_power_of_2(pages)) |
1037 | pages = rounddown_pow_of_two(pages); | |
8185e881 | 1038 | } else if (!is_power_of_2(pages)) |
994a1f78 JO |
1039 | return 0; |
1040 | ||
1041 | return (pages + 1) * page_size; | |
1042 | } | |
1043 | ||
33c2dcfd DA |
1044 | static long parse_pages_arg(const char *str, unsigned long min, |
1045 | unsigned long max) | |
994a1f78 | 1046 | { |
2fbe4abe | 1047 | unsigned long pages, val; |
27050f53 JO |
1048 | static struct parse_tag tags[] = { |
1049 | { .tag = 'B', .mult = 1 }, | |
1050 | { .tag = 'K', .mult = 1 << 10 }, | |
1051 | { .tag = 'M', .mult = 1 << 20 }, | |
1052 | { .tag = 'G', .mult = 1 << 30 }, | |
1053 | { .tag = 0 }, | |
1054 | }; | |
994a1f78 | 1055 | |
8973504b | 1056 | if (str == NULL) |
33c2dcfd | 1057 | return -EINVAL; |
8973504b | 1058 | |
27050f53 | 1059 | val = parse_tag_value(str, tags); |
2fbe4abe | 1060 | if (val != (unsigned long) -1) { |
27050f53 JO |
1061 | /* we got file size value */ |
1062 | pages = PERF_ALIGN(val, page_size) / page_size; | |
27050f53 JO |
1063 | } else { |
1064 | /* we got pages count value */ | |
1065 | char *eptr; | |
1066 | pages = strtoul(str, &eptr, 10); | |
33c2dcfd DA |
1067 | if (*eptr != '\0') |
1068 | return -EINVAL; | |
994a1f78 JO |
1069 | } |
1070 | ||
2bcab6c1 | 1071 | if (pages == 0 && min == 0) { |
33c2dcfd | 1072 | /* leave number of pages at 0 */ |
1dbfa938 | 1073 | } else if (!is_power_of_2(pages)) { |
33c2dcfd | 1074 | /* round pages up to next power of 2 */ |
91529834 | 1075 | pages = roundup_pow_of_two(pages); |
1dbfa938 AH |
1076 | if (!pages) |
1077 | return -EINVAL; | |
9639837e DA |
1078 | pr_info("rounding mmap pages size to %lu bytes (%lu pages)\n", |
1079 | pages * page_size, pages); | |
2fbe4abe AH |
1080 | } |
1081 | ||
33c2dcfd DA |
1082 | if (pages > max) |
1083 | return -EINVAL; | |
1084 | ||
1085 | return pages; | |
1086 | } | |
1087 | ||
e9db1310 | 1088 | int __perf_evlist__parse_mmap_pages(unsigned int *mmap_pages, const char *str) |
33c2dcfd | 1089 | { |
33c2dcfd DA |
1090 | unsigned long max = UINT_MAX; |
1091 | long pages; | |
1092 | ||
f5ae9c42 | 1093 | if (max > SIZE_MAX / page_size) |
33c2dcfd DA |
1094 | max = SIZE_MAX / page_size; |
1095 | ||
1096 | pages = parse_pages_arg(str, 1, max); | |
1097 | if (pages < 0) { | |
1098 | pr_err("Invalid argument for --mmap_pages/-m\n"); | |
994a1f78 JO |
1099 | return -1; |
1100 | } | |
1101 | ||
1102 | *mmap_pages = pages; | |
1103 | return 0; | |
1104 | } | |
1105 | ||
e9db1310 AH |
1106 | int perf_evlist__parse_mmap_pages(const struct option *opt, const char *str, |
1107 | int unset __maybe_unused) | |
1108 | { | |
1109 | return __perf_evlist__parse_mmap_pages(opt->value, str); | |
1110 | } | |
1111 | ||
c83fa7f2 | 1112 | /** |
718c602d | 1113 | * perf_evlist__mmap_ex - Create mmaps to receive events. |
c83fa7f2 AH |
1114 | * @evlist: list of events |
1115 | * @pages: map length in pages | |
1116 | * @overwrite: overwrite older events? | |
718c602d AH |
1117 | * @auxtrace_pages - auxtrace map length in pages |
1118 | * @auxtrace_overwrite - overwrite older auxtrace data? | |
f8a95309 | 1119 | * |
c83fa7f2 AH |
1120 | * If @overwrite is %false the user needs to signal event consumption using |
1121 | * perf_mmap__write_tail(). Using perf_evlist__mmap_read() does this | |
1122 | * automatically. | |
7e2ed097 | 1123 | * |
718c602d AH |
1124 | * Similarly, if @auxtrace_overwrite is %false the user needs to signal data |
1125 | * consumption using auxtrace_mmap__write_tail(). | |
1126 | * | |
c83fa7f2 | 1127 | * Return: %0 on success, negative error code otherwise. |
f8a95309 | 1128 | */ |
718c602d AH |
1129 | int perf_evlist__mmap_ex(struct perf_evlist *evlist, unsigned int pages, |
1130 | bool overwrite, unsigned int auxtrace_pages, | |
1131 | bool auxtrace_overwrite) | |
f8a95309 | 1132 | { |
aece948f | 1133 | struct perf_evsel *evsel; |
7e2ed097 ACM |
1134 | const struct cpu_map *cpus = evlist->cpus; |
1135 | const struct thread_map *threads = evlist->threads; | |
a8a8f3eb AH |
1136 | struct mmap_params mp = { |
1137 | .prot = PROT_READ | (overwrite ? 0 : PROT_WRITE), | |
1138 | }; | |
50a682ce | 1139 | |
7e2ed097 | 1140 | if (evlist->mmap == NULL && perf_evlist__alloc_mmap(evlist) < 0) |
f8a95309 ACM |
1141 | return -ENOMEM; |
1142 | ||
1b85337d | 1143 | if (evlist->pollfd.entries == NULL && perf_evlist__alloc_pollfd(evlist) < 0) |
f8a95309 ACM |
1144 | return -ENOMEM; |
1145 | ||
1146 | evlist->overwrite = overwrite; | |
994a1f78 | 1147 | evlist->mmap_len = perf_evlist__mmap_size(pages); |
2af68ef5 | 1148 | pr_debug("mmap size %zuB\n", evlist->mmap_len); |
a8a8f3eb | 1149 | mp.mask = evlist->mmap_len - page_size - 1; |
f8a95309 | 1150 | |
718c602d AH |
1151 | auxtrace_mmap_params__init(&mp.auxtrace_mp, evlist->mmap_len, |
1152 | auxtrace_pages, auxtrace_overwrite); | |
1153 | ||
0050f7aa | 1154 | evlist__for_each(evlist, evsel) { |
f8a95309 | 1155 | if ((evsel->attr.read_format & PERF_FORMAT_ID) && |
a91e5431 | 1156 | evsel->sample_id == NULL && |
a14bb7a6 | 1157 | perf_evsel__alloc_id(evsel, cpu_map__nr(cpus), threads->nr) < 0) |
f8a95309 | 1158 | return -ENOMEM; |
f8a95309 ACM |
1159 | } |
1160 | ||
ec1e7e43 | 1161 | if (cpu_map__empty(cpus)) |
a8a8f3eb | 1162 | return perf_evlist__mmap_per_thread(evlist, &mp); |
f8a95309 | 1163 | |
a8a8f3eb | 1164 | return perf_evlist__mmap_per_cpu(evlist, &mp); |
f8a95309 | 1165 | } |
7e2ed097 | 1166 | |
718c602d AH |
1167 | int perf_evlist__mmap(struct perf_evlist *evlist, unsigned int pages, |
1168 | bool overwrite) | |
1169 | { | |
1170 | return perf_evlist__mmap_ex(evlist, pages, overwrite, 0, false); | |
1171 | } | |
1172 | ||
602ad878 | 1173 | int perf_evlist__create_maps(struct perf_evlist *evlist, struct target *target) |
7e2ed097 | 1174 | { |
74bfd2b2 AH |
1175 | struct cpu_map *cpus; |
1176 | struct thread_map *threads; | |
7e2ed097 | 1177 | |
74bfd2b2 | 1178 | threads = thread_map__new_str(target->pid, target->tid, target->uid); |
7e2ed097 | 1179 | |
74bfd2b2 | 1180 | if (!threads) |
7e2ed097 ACM |
1181 | return -1; |
1182 | ||
9c105fbc | 1183 | if (target__uses_dummy_map(target)) |
74bfd2b2 | 1184 | cpus = cpu_map__dummy_new(); |
879d77d0 | 1185 | else |
74bfd2b2 | 1186 | cpus = cpu_map__new(target->cpu_list); |
7e2ed097 | 1187 | |
74bfd2b2 | 1188 | if (!cpus) |
7e2ed097 ACM |
1189 | goto out_delete_threads; |
1190 | ||
ec9a77a7 AH |
1191 | evlist->has_user_cpus = !!target->cpu_list; |
1192 | ||
74bfd2b2 | 1193 | perf_evlist__set_maps(evlist, cpus, threads); |
d5bc056e AH |
1194 | |
1195 | return 0; | |
7e2ed097 ACM |
1196 | |
1197 | out_delete_threads: | |
74bfd2b2 | 1198 | thread_map__put(threads); |
7e2ed097 ACM |
1199 | return -1; |
1200 | } | |
1201 | ||
d5bc056e AH |
1202 | void perf_evlist__set_maps(struct perf_evlist *evlist, struct cpu_map *cpus, |
1203 | struct thread_map *threads) | |
3de5cfb0 | 1204 | { |
934e0f20 AH |
1205 | /* |
1206 | * Allow for the possibility that one or another of the maps isn't being | |
1207 | * changed i.e. don't put it. Note we are assuming the maps that are | |
1208 | * being applied are brand new and evlist is taking ownership of the | |
1209 | * original reference count of 1. If that is not the case it is up to | |
1210 | * the caller to increase the reference count. | |
1211 | */ | |
1212 | if (cpus != evlist->cpus) { | |
3de5cfb0 | 1213 | cpu_map__put(evlist->cpus); |
934e0f20 AH |
1214 | evlist->cpus = cpus; |
1215 | } | |
3de5cfb0 | 1216 | |
934e0f20 | 1217 | if (threads != evlist->threads) { |
3de5cfb0 | 1218 | thread_map__put(evlist->threads); |
934e0f20 AH |
1219 | evlist->threads = threads; |
1220 | } | |
3de5cfb0 | 1221 | |
ec9a77a7 | 1222 | perf_evlist__propagate_maps(evlist); |
3de5cfb0 JO |
1223 | } |
1224 | ||
23d4aad4 | 1225 | int perf_evlist__apply_filters(struct perf_evlist *evlist, struct perf_evsel **err_evsel) |
0a102479 | 1226 | { |
0a102479 | 1227 | struct perf_evsel *evsel; |
745cefc5 ACM |
1228 | int err = 0; |
1229 | const int ncpus = cpu_map__nr(evlist->cpus), | |
b3a319d5 | 1230 | nthreads = thread_map__nr(evlist->threads); |
0a102479 | 1231 | |
0050f7aa | 1232 | evlist__for_each(evlist, evsel) { |
745cefc5 | 1233 | if (evsel->filter == NULL) |
0a102479 | 1234 | continue; |
745cefc5 | 1235 | |
d988d5ee KL |
1236 | /* |
1237 | * filters only work for tracepoint event, which doesn't have cpu limit. | |
1238 | * So evlist and evsel should always be same. | |
1239 | */ | |
f47805a2 | 1240 | err = perf_evsel__apply_filter(evsel, ncpus, nthreads, evsel->filter); |
23d4aad4 ACM |
1241 | if (err) { |
1242 | *err_evsel = evsel; | |
745cefc5 | 1243 | break; |
23d4aad4 | 1244 | } |
0a102479 FW |
1245 | } |
1246 | ||
745cefc5 ACM |
1247 | return err; |
1248 | } | |
1249 | ||
1250 | int perf_evlist__set_filter(struct perf_evlist *evlist, const char *filter) | |
1251 | { | |
1252 | struct perf_evsel *evsel; | |
1253 | int err = 0; | |
745cefc5 | 1254 | |
0050f7aa | 1255 | evlist__for_each(evlist, evsel) { |
94ad89bc | 1256 | err = perf_evsel__set_filter(evsel, filter); |
745cefc5 ACM |
1257 | if (err) |
1258 | break; | |
1259 | } | |
1260 | ||
1261 | return err; | |
0a102479 | 1262 | } |
74429964 | 1263 | |
be199ada | 1264 | int perf_evlist__set_filter_pids(struct perf_evlist *evlist, size_t npids, pid_t *pids) |
cfd70a26 ACM |
1265 | { |
1266 | char *filter; | |
be199ada ACM |
1267 | int ret = -1; |
1268 | size_t i; | |
cfd70a26 | 1269 | |
be199ada ACM |
1270 | for (i = 0; i < npids; ++i) { |
1271 | if (i == 0) { | |
1272 | if (asprintf(&filter, "common_pid != %d", pids[i]) < 0) | |
1273 | return -1; | |
1274 | } else { | |
1275 | char *tmp; | |
1276 | ||
1277 | if (asprintf(&tmp, "%s && common_pid != %d", filter, pids[i]) < 0) | |
1278 | goto out_free; | |
1279 | ||
1280 | free(filter); | |
1281 | filter = tmp; | |
1282 | } | |
1283 | } | |
cfd70a26 ACM |
1284 | |
1285 | ret = perf_evlist__set_filter(evlist, filter); | |
be199ada | 1286 | out_free: |
cfd70a26 ACM |
1287 | free(filter); |
1288 | return ret; | |
1289 | } | |
1290 | ||
be199ada ACM |
1291 | int perf_evlist__set_filter_pid(struct perf_evlist *evlist, pid_t pid) |
1292 | { | |
1293 | return perf_evlist__set_filter_pids(evlist, 1, &pid); | |
1294 | } | |
1295 | ||
0c21f736 | 1296 | bool perf_evlist__valid_sample_type(struct perf_evlist *evlist) |
74429964 | 1297 | { |
75562573 | 1298 | struct perf_evsel *pos; |
c2a70653 | 1299 | |
75562573 AH |
1300 | if (evlist->nr_entries == 1) |
1301 | return true; | |
1302 | ||
1303 | if (evlist->id_pos < 0 || evlist->is_pos < 0) | |
1304 | return false; | |
1305 | ||
0050f7aa | 1306 | evlist__for_each(evlist, pos) { |
75562573 AH |
1307 | if (pos->id_pos != evlist->id_pos || |
1308 | pos->is_pos != evlist->is_pos) | |
c2a70653 | 1309 | return false; |
74429964 FW |
1310 | } |
1311 | ||
c2a70653 | 1312 | return true; |
74429964 FW |
1313 | } |
1314 | ||
75562573 | 1315 | u64 __perf_evlist__combined_sample_type(struct perf_evlist *evlist) |
c2a70653 | 1316 | { |
75562573 AH |
1317 | struct perf_evsel *evsel; |
1318 | ||
1319 | if (evlist->combined_sample_type) | |
1320 | return evlist->combined_sample_type; | |
1321 | ||
0050f7aa | 1322 | evlist__for_each(evlist, evsel) |
75562573 AH |
1323 | evlist->combined_sample_type |= evsel->attr.sample_type; |
1324 | ||
1325 | return evlist->combined_sample_type; | |
1326 | } | |
1327 | ||
1328 | u64 perf_evlist__combined_sample_type(struct perf_evlist *evlist) | |
1329 | { | |
1330 | evlist->combined_sample_type = 0; | |
1331 | return __perf_evlist__combined_sample_type(evlist); | |
c2a70653 ACM |
1332 | } |
1333 | ||
98df858e AK |
1334 | u64 perf_evlist__combined_branch_type(struct perf_evlist *evlist) |
1335 | { | |
1336 | struct perf_evsel *evsel; | |
1337 | u64 branch_type = 0; | |
1338 | ||
1339 | evlist__for_each(evlist, evsel) | |
1340 | branch_type |= evsel->attr.branch_sample_type; | |
1341 | return branch_type; | |
1342 | } | |
1343 | ||
9ede473c JO |
1344 | bool perf_evlist__valid_read_format(struct perf_evlist *evlist) |
1345 | { | |
1346 | struct perf_evsel *first = perf_evlist__first(evlist), *pos = first; | |
1347 | u64 read_format = first->attr.read_format; | |
1348 | u64 sample_type = first->attr.sample_type; | |
1349 | ||
0050f7aa | 1350 | evlist__for_each(evlist, pos) { |
9ede473c JO |
1351 | if (read_format != pos->attr.read_format) |
1352 | return false; | |
1353 | } | |
1354 | ||
1355 | /* PERF_SAMPLE_READ imples PERF_FORMAT_ID. */ | |
1356 | if ((sample_type & PERF_SAMPLE_READ) && | |
1357 | !(read_format & PERF_FORMAT_ID)) { | |
1358 | return false; | |
1359 | } | |
1360 | ||
1361 | return true; | |
1362 | } | |
1363 | ||
1364 | u64 perf_evlist__read_format(struct perf_evlist *evlist) | |
1365 | { | |
1366 | struct perf_evsel *first = perf_evlist__first(evlist); | |
1367 | return first->attr.read_format; | |
1368 | } | |
1369 | ||
0c21f736 | 1370 | u16 perf_evlist__id_hdr_size(struct perf_evlist *evlist) |
81e36bff | 1371 | { |
0c21f736 | 1372 | struct perf_evsel *first = perf_evlist__first(evlist); |
81e36bff ACM |
1373 | struct perf_sample *data; |
1374 | u64 sample_type; | |
1375 | u16 size = 0; | |
1376 | ||
81e36bff ACM |
1377 | if (!first->attr.sample_id_all) |
1378 | goto out; | |
1379 | ||
1380 | sample_type = first->attr.sample_type; | |
1381 | ||
1382 | if (sample_type & PERF_SAMPLE_TID) | |
1383 | size += sizeof(data->tid) * 2; | |
1384 | ||
1385 | if (sample_type & PERF_SAMPLE_TIME) | |
1386 | size += sizeof(data->time); | |
1387 | ||
1388 | if (sample_type & PERF_SAMPLE_ID) | |
1389 | size += sizeof(data->id); | |
1390 | ||
1391 | if (sample_type & PERF_SAMPLE_STREAM_ID) | |
1392 | size += sizeof(data->stream_id); | |
1393 | ||
1394 | if (sample_type & PERF_SAMPLE_CPU) | |
1395 | size += sizeof(data->cpu) * 2; | |
75562573 AH |
1396 | |
1397 | if (sample_type & PERF_SAMPLE_IDENTIFIER) | |
1398 | size += sizeof(data->id); | |
81e36bff ACM |
1399 | out: |
1400 | return size; | |
1401 | } | |
1402 | ||
0c21f736 | 1403 | bool perf_evlist__valid_sample_id_all(struct perf_evlist *evlist) |
74429964 | 1404 | { |
0c21f736 | 1405 | struct perf_evsel *first = perf_evlist__first(evlist), *pos = first; |
c2a70653 | 1406 | |
0050f7aa | 1407 | evlist__for_each_continue(evlist, pos) { |
c2a70653 ACM |
1408 | if (first->attr.sample_id_all != pos->attr.sample_id_all) |
1409 | return false; | |
74429964 FW |
1410 | } |
1411 | ||
c2a70653 ACM |
1412 | return true; |
1413 | } | |
1414 | ||
0c21f736 | 1415 | bool perf_evlist__sample_id_all(struct perf_evlist *evlist) |
c2a70653 | 1416 | { |
0c21f736 | 1417 | struct perf_evsel *first = perf_evlist__first(evlist); |
c2a70653 | 1418 | return first->attr.sample_id_all; |
74429964 | 1419 | } |
81cce8de ACM |
1420 | |
1421 | void perf_evlist__set_selected(struct perf_evlist *evlist, | |
1422 | struct perf_evsel *evsel) | |
1423 | { | |
1424 | evlist->selected = evsel; | |
1425 | } | |
727ab04e | 1426 | |
a74b4b66 NK |
1427 | void perf_evlist__close(struct perf_evlist *evlist) |
1428 | { | |
1429 | struct perf_evsel *evsel; | |
1430 | int ncpus = cpu_map__nr(evlist->cpus); | |
1431 | int nthreads = thread_map__nr(evlist->threads); | |
8ad9219e | 1432 | int n; |
a74b4b66 | 1433 | |
8ad9219e SE |
1434 | evlist__for_each_reverse(evlist, evsel) { |
1435 | n = evsel->cpus ? evsel->cpus->nr : ncpus; | |
1436 | perf_evsel__close(evsel, n, nthreads); | |
1437 | } | |
a74b4b66 NK |
1438 | } |
1439 | ||
4112eb18 ACM |
1440 | static int perf_evlist__create_syswide_maps(struct perf_evlist *evlist) |
1441 | { | |
8c0498b6 AH |
1442 | struct cpu_map *cpus; |
1443 | struct thread_map *threads; | |
4112eb18 ACM |
1444 | int err = -ENOMEM; |
1445 | ||
1446 | /* | |
1447 | * Try reading /sys/devices/system/cpu/online to get | |
1448 | * an all cpus map. | |
1449 | * | |
1450 | * FIXME: -ENOMEM is the best we can do here, the cpu_map | |
1451 | * code needs an overhaul to properly forward the | |
1452 | * error, and we may not want to do that fallback to a | |
1453 | * default cpu identity map :-\ | |
1454 | */ | |
8c0498b6 AH |
1455 | cpus = cpu_map__new(NULL); |
1456 | if (!cpus) | |
4112eb18 ACM |
1457 | goto out; |
1458 | ||
8c0498b6 AH |
1459 | threads = thread_map__new_dummy(); |
1460 | if (!threads) | |
1461 | goto out_put; | |
4112eb18 | 1462 | |
8c0498b6 | 1463 | perf_evlist__set_maps(evlist, cpus, threads); |
4112eb18 ACM |
1464 | out: |
1465 | return err; | |
8c0498b6 AH |
1466 | out_put: |
1467 | cpu_map__put(cpus); | |
4112eb18 ACM |
1468 | goto out; |
1469 | } | |
1470 | ||
6a4bb04c | 1471 | int perf_evlist__open(struct perf_evlist *evlist) |
727ab04e | 1472 | { |
6a4bb04c | 1473 | struct perf_evsel *evsel; |
a74b4b66 | 1474 | int err; |
727ab04e | 1475 | |
4112eb18 ACM |
1476 | /* |
1477 | * Default: one fd per CPU, all threads, aka systemwide | |
1478 | * as sys_perf_event_open(cpu = -1, thread = -1) is EINVAL | |
1479 | */ | |
1480 | if (evlist->threads == NULL && evlist->cpus == NULL) { | |
1481 | err = perf_evlist__create_syswide_maps(evlist); | |
1482 | if (err < 0) | |
1483 | goto out_err; | |
1484 | } | |
1485 | ||
733cd2fe AH |
1486 | perf_evlist__update_id_pos(evlist); |
1487 | ||
0050f7aa | 1488 | evlist__for_each(evlist, evsel) { |
6a4bb04c | 1489 | err = perf_evsel__open(evsel, evlist->cpus, evlist->threads); |
727ab04e ACM |
1490 | if (err < 0) |
1491 | goto out_err; | |
1492 | } | |
1493 | ||
1494 | return 0; | |
1495 | out_err: | |
a74b4b66 | 1496 | perf_evlist__close(evlist); |
41c21a68 | 1497 | errno = -err; |
727ab04e ACM |
1498 | return err; |
1499 | } | |
35b9d88e | 1500 | |
602ad878 | 1501 | int perf_evlist__prepare_workload(struct perf_evlist *evlist, struct target *target, |
55e162ea | 1502 | const char *argv[], bool pipe_output, |
735f7e0b | 1503 | void (*exec_error)(int signo, siginfo_t *info, void *ucontext)) |
35b9d88e ACM |
1504 | { |
1505 | int child_ready_pipe[2], go_pipe[2]; | |
1506 | char bf; | |
1507 | ||
1508 | if (pipe(child_ready_pipe) < 0) { | |
1509 | perror("failed to create 'ready' pipe"); | |
1510 | return -1; | |
1511 | } | |
1512 | ||
1513 | if (pipe(go_pipe) < 0) { | |
1514 | perror("failed to create 'go' pipe"); | |
1515 | goto out_close_ready_pipe; | |
1516 | } | |
1517 | ||
1518 | evlist->workload.pid = fork(); | |
1519 | if (evlist->workload.pid < 0) { | |
1520 | perror("failed to fork"); | |
1521 | goto out_close_pipes; | |
1522 | } | |
1523 | ||
1524 | if (!evlist->workload.pid) { | |
5f1c4225 ACM |
1525 | int ret; |
1526 | ||
119fa3c9 | 1527 | if (pipe_output) |
35b9d88e ACM |
1528 | dup2(2, 1); |
1529 | ||
0817df08 DA |
1530 | signal(SIGTERM, SIG_DFL); |
1531 | ||
35b9d88e ACM |
1532 | close(child_ready_pipe[0]); |
1533 | close(go_pipe[1]); | |
1534 | fcntl(go_pipe[0], F_SETFD, FD_CLOEXEC); | |
1535 | ||
35b9d88e ACM |
1536 | /* |
1537 | * Tell the parent we're ready to go | |
1538 | */ | |
1539 | close(child_ready_pipe[1]); | |
1540 | ||
1541 | /* | |
1542 | * Wait until the parent tells us to go. | |
1543 | */ | |
5f1c4225 ACM |
1544 | ret = read(go_pipe[0], &bf, 1); |
1545 | /* | |
1546 | * The parent will ask for the execvp() to be performed by | |
1547 | * writing exactly one byte, in workload.cork_fd, usually via | |
1548 | * perf_evlist__start_workload(). | |
1549 | * | |
20f86fc1 | 1550 | * For cancelling the workload without actually running it, |
5f1c4225 ACM |
1551 | * the parent will just close workload.cork_fd, without writing |
1552 | * anything, i.e. read will return zero and we just exit() | |
1553 | * here. | |
1554 | */ | |
1555 | if (ret != 1) { | |
1556 | if (ret == -1) | |
1557 | perror("unable to read pipe"); | |
1558 | exit(ret); | |
1559 | } | |
35b9d88e ACM |
1560 | |
1561 | execvp(argv[0], (char **)argv); | |
1562 | ||
735f7e0b | 1563 | if (exec_error) { |
f33cbe72 ACM |
1564 | union sigval val; |
1565 | ||
1566 | val.sival_int = errno; | |
1567 | if (sigqueue(getppid(), SIGUSR1, val)) | |
1568 | perror(argv[0]); | |
1569 | } else | |
1570 | perror(argv[0]); | |
35b9d88e ACM |
1571 | exit(-1); |
1572 | } | |
1573 | ||
735f7e0b ACM |
1574 | if (exec_error) { |
1575 | struct sigaction act = { | |
1576 | .sa_flags = SA_SIGINFO, | |
1577 | .sa_sigaction = exec_error, | |
1578 | }; | |
1579 | sigaction(SIGUSR1, &act, NULL); | |
1580 | } | |
1581 | ||
1aaf63b1 ACM |
1582 | if (target__none(target)) { |
1583 | if (evlist->threads == NULL) { | |
1584 | fprintf(stderr, "FATAL: evlist->threads need to be set at this point (%s:%d).\n", | |
1585 | __func__, __LINE__); | |
1586 | goto out_close_pipes; | |
1587 | } | |
e13798c7 | 1588 | thread_map__set_pid(evlist->threads, 0, evlist->workload.pid); |
1aaf63b1 | 1589 | } |
35b9d88e ACM |
1590 | |
1591 | close(child_ready_pipe[1]); | |
1592 | close(go_pipe[0]); | |
1593 | /* | |
1594 | * wait for child to settle | |
1595 | */ | |
1596 | if (read(child_ready_pipe[0], &bf, 1) == -1) { | |
1597 | perror("unable to read pipe"); | |
1598 | goto out_close_pipes; | |
1599 | } | |
1600 | ||
bcf3145f | 1601 | fcntl(go_pipe[1], F_SETFD, FD_CLOEXEC); |
35b9d88e ACM |
1602 | evlist->workload.cork_fd = go_pipe[1]; |
1603 | close(child_ready_pipe[0]); | |
1604 | return 0; | |
1605 | ||
1606 | out_close_pipes: | |
1607 | close(go_pipe[0]); | |
1608 | close(go_pipe[1]); | |
1609 | out_close_ready_pipe: | |
1610 | close(child_ready_pipe[0]); | |
1611 | close(child_ready_pipe[1]); | |
1612 | return -1; | |
1613 | } | |
1614 | ||
1615 | int perf_evlist__start_workload(struct perf_evlist *evlist) | |
1616 | { | |
1617 | if (evlist->workload.cork_fd > 0) { | |
b3824404 | 1618 | char bf = 0; |
bcf3145f | 1619 | int ret; |
35b9d88e ACM |
1620 | /* |
1621 | * Remove the cork, let it rip! | |
1622 | */ | |
bcf3145f NK |
1623 | ret = write(evlist->workload.cork_fd, &bf, 1); |
1624 | if (ret < 0) | |
1625 | perror("enable to write to pipe"); | |
1626 | ||
1627 | close(evlist->workload.cork_fd); | |
1628 | return ret; | |
35b9d88e ACM |
1629 | } |
1630 | ||
1631 | return 0; | |
1632 | } | |
cb0b29e0 | 1633 | |
a3f698fe | 1634 | int perf_evlist__parse_sample(struct perf_evlist *evlist, union perf_event *event, |
0807d2d8 | 1635 | struct perf_sample *sample) |
cb0b29e0 | 1636 | { |
75562573 AH |
1637 | struct perf_evsel *evsel = perf_evlist__event2evsel(evlist, event); |
1638 | ||
1639 | if (!evsel) | |
1640 | return -EFAULT; | |
0807d2d8 | 1641 | return perf_evsel__parse_sample(evsel, event, sample); |
cb0b29e0 | 1642 | } |
78f067b3 ACM |
1643 | |
1644 | size_t perf_evlist__fprintf(struct perf_evlist *evlist, FILE *fp) | |
1645 | { | |
1646 | struct perf_evsel *evsel; | |
1647 | size_t printed = 0; | |
1648 | ||
0050f7aa | 1649 | evlist__for_each(evlist, evsel) { |
78f067b3 ACM |
1650 | printed += fprintf(fp, "%s%s", evsel->idx ? ", " : "", |
1651 | perf_evsel__name(evsel)); | |
1652 | } | |
1653 | ||
b2222139 | 1654 | return printed + fprintf(fp, "\n"); |
78f067b3 | 1655 | } |
6ef068cb | 1656 | |
a8f23d8f ACM |
1657 | int perf_evlist__strerror_open(struct perf_evlist *evlist __maybe_unused, |
1658 | int err, char *buf, size_t size) | |
1659 | { | |
1660 | int printed, value; | |
6e81c74c | 1661 | char sbuf[STRERR_BUFSIZE], *emsg = strerror_r(err, sbuf, sizeof(sbuf)); |
a8f23d8f ACM |
1662 | |
1663 | switch (err) { | |
1664 | case EACCES: | |
1665 | case EPERM: | |
1666 | printed = scnprintf(buf, size, | |
1667 | "Error:\t%s.\n" | |
1668 | "Hint:\tCheck /proc/sys/kernel/perf_event_paranoid setting.", emsg); | |
1669 | ||
1a47245d | 1670 | value = perf_event_paranoid(); |
a8f23d8f ACM |
1671 | |
1672 | printed += scnprintf(buf + printed, size - printed, "\nHint:\t"); | |
1673 | ||
1674 | if (value >= 2) { | |
1675 | printed += scnprintf(buf + printed, size - printed, | |
1676 | "For your workloads it needs to be <= 1\nHint:\t"); | |
1677 | } | |
1678 | printed += scnprintf(buf + printed, size - printed, | |
5229e366 | 1679 | "For system wide tracing it needs to be set to -1.\n"); |
a8f23d8f ACM |
1680 | |
1681 | printed += scnprintf(buf + printed, size - printed, | |
5229e366 ACM |
1682 | "Hint:\tTry: 'sudo sh -c \"echo -1 > /proc/sys/kernel/perf_event_paranoid\"'\n" |
1683 | "Hint:\tThe current value is %d.", value); | |
a8f23d8f ACM |
1684 | break; |
1685 | default: | |
1686 | scnprintf(buf, size, "%s", emsg); | |
1687 | break; | |
1688 | } | |
1689 | ||
1690 | return 0; | |
1691 | } | |
a025e4f0 | 1692 | |
956fa571 ACM |
1693 | int perf_evlist__strerror_mmap(struct perf_evlist *evlist, int err, char *buf, size_t size) |
1694 | { | |
1695 | char sbuf[STRERR_BUFSIZE], *emsg = strerror_r(err, sbuf, sizeof(sbuf)); | |
e965bea1 | 1696 | int pages_attempted = evlist->mmap_len / 1024, pages_max_per_user, printed = 0; |
956fa571 ACM |
1697 | |
1698 | switch (err) { | |
1699 | case EPERM: | |
e5d4a290 | 1700 | sysctl__read_int("kernel/perf_event_mlock_kb", &pages_max_per_user); |
e965bea1 ACM |
1701 | printed += scnprintf(buf + printed, size - printed, |
1702 | "Error:\t%s.\n" | |
956fa571 | 1703 | "Hint:\tCheck /proc/sys/kernel/perf_event_mlock_kb (%d kB) setting.\n" |
e965bea1 | 1704 | "Hint:\tTried using %zd kB.\n", |
e5d4a290 | 1705 | emsg, pages_max_per_user, pages_attempted); |
e965bea1 ACM |
1706 | |
1707 | if (pages_attempted >= pages_max_per_user) { | |
1708 | printed += scnprintf(buf + printed, size - printed, | |
1709 | "Hint:\tTry 'sudo sh -c \"echo %d > /proc/sys/kernel/perf_event_mlock_kb\"', or\n", | |
1710 | pages_max_per_user + pages_attempted); | |
1711 | } | |
1712 | ||
1713 | printed += scnprintf(buf + printed, size - printed, | |
1714 | "Hint:\tTry using a smaller -m/--mmap-pages value."); | |
956fa571 ACM |
1715 | break; |
1716 | default: | |
1717 | scnprintf(buf, size, "%s", emsg); | |
1718 | break; | |
1719 | } | |
1720 | ||
1721 | return 0; | |
1722 | } | |
1723 | ||
a025e4f0 AH |
1724 | void perf_evlist__to_front(struct perf_evlist *evlist, |
1725 | struct perf_evsel *move_evsel) | |
1726 | { | |
1727 | struct perf_evsel *evsel, *n; | |
1728 | LIST_HEAD(move); | |
1729 | ||
1730 | if (move_evsel == perf_evlist__first(evlist)) | |
1731 | return; | |
1732 | ||
0050f7aa | 1733 | evlist__for_each_safe(evlist, n, evsel) { |
a025e4f0 AH |
1734 | if (evsel->leader == move_evsel->leader) |
1735 | list_move_tail(&evsel->node, &move); | |
1736 | } | |
1737 | ||
1738 | list_splice(&move, &evlist->entries); | |
1739 | } | |
60b0896c AH |
1740 | |
1741 | void perf_evlist__set_tracking_event(struct perf_evlist *evlist, | |
1742 | struct perf_evsel *tracking_evsel) | |
1743 | { | |
1744 | struct perf_evsel *evsel; | |
1745 | ||
1746 | if (tracking_evsel->tracking) | |
1747 | return; | |
1748 | ||
1749 | evlist__for_each(evlist, evsel) { | |
1750 | if (evsel != tracking_evsel) | |
1751 | evsel->tracking = false; | |
1752 | } | |
1753 | ||
1754 | tracking_evsel->tracking = true; | |
1755 | } |