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91007045 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
f8a95309 ACM |
2 | /* |
3 | * Copyright (C) 2011, Red Hat Inc, Arnaldo Carvalho de Melo <acme@redhat.com> | |
4 | * | |
5 | * Parts came from builtin-{top,stat,record}.c, see those files for further | |
6 | * copyright notes. | |
f8a95309 | 7 | */ |
956fa571 | 8 | #include <api/fs/fs.h> |
a43783ae | 9 | #include <errno.h> |
fd20e811 | 10 | #include <inttypes.h> |
5c581041 | 11 | #include <poll.h> |
f8a95309 | 12 | #include "cpumap.h" |
e0fcfb08 | 13 | #include "util/mmap.h" |
f8a95309 | 14 | #include "thread_map.h" |
12864b31 | 15 | #include "target.h" |
361c99a6 ACM |
16 | #include "evlist.h" |
17 | #include "evsel.h" | |
6657a099 | 18 | #include "record.h" |
e3e1a54f | 19 | #include "debug.h" |
58db1d6e | 20 | #include "units.h" |
5508c9da | 21 | #include "bpf_counter.h" |
20f2be1d | 22 | #include <internal/lib.h> // page_size |
7736627b | 23 | #include "affinity.h" |
c1a604df | 24 | #include "../perf.h" |
54cc54de | 25 | #include "asm/bug.h" |
657ee553 | 26 | #include "bpf-event.h" |
2e5a738a | 27 | #include "util/event.h" |
da949f50 | 28 | #include "util/string2.h" |
40c7d246 | 29 | #include "util/perf_api_probe.h" |
142544a9 | 30 | #include "util/evsel_fprintf.h" |
1d3351e6 | 31 | #include "util/pmu.h" |
9823147d | 32 | #include "util/sample.h" |
d180aa56 | 33 | #include "util/bpf-filter.h" |
ac873ac3 | 34 | #include "util/stat.h" |
ea0c5239 | 35 | #include "util/util.h" |
9607ad3a | 36 | #include <signal.h> |
35b9d88e | 37 | #include <unistd.h> |
b397f846 | 38 | #include <sched.h> |
f2a39fe8 | 39 | #include <stdlib.h> |
361c99a6 | 40 | |
50d08e47 | 41 | #include "parse-events.h" |
4b6ab94e | 42 | #include <subcmd/parse-options.h> |
50d08e47 | 43 | |
bafae98e | 44 | #include <fcntl.h> |
86a5e0c2 | 45 | #include <sys/ioctl.h> |
f8a95309 | 46 | #include <sys/mman.h> |
a7672d1d | 47 | #include <sys/prctl.h> |
6657a099 | 48 | #include <sys/timerfd.h> |
f8a95309 | 49 | |
70db7533 ACM |
50 | #include <linux/bitops.h> |
51 | #include <linux/hash.h> | |
0389cd1f | 52 | #include <linux/log2.h> |
8dd2a131 | 53 | #include <linux/err.h> |
8520a98d | 54 | #include <linux/string.h> |
6657a099 | 55 | #include <linux/time64.h> |
7f7c536f | 56 | #include <linux/zalloc.h> |
4562a739 | 57 | #include <perf/evlist.h> |
88761fa1 | 58 | #include <perf/evsel.h> |
9c3516d1 | 59 | #include <perf/cpumap.h> |
7728fa0c | 60 | #include <perf/mmap.h> |
70db7533 | 61 | |
e14e5497 ACM |
62 | #include <internal/xyarray.h> |
63 | ||
748fe088 ACM |
64 | #ifdef LACKS_SIGQUEUE_PROTOTYPE |
65 | int sigqueue(pid_t pid, int sig, const union sigval value); | |
66 | #endif | |
67 | ||
9dfcb759 | 68 | #define FD(e, x, y) (*(int *)xyarray__entry(e->core.fd, x, y)) |
8cd36f3e | 69 | #define SID(e, x, y) xyarray__entry(e->core.sample_id, x, y) |
f8a95309 | 70 | |
52c86bca JO |
71 | void evlist__init(struct evlist *evlist, struct perf_cpu_map *cpus, |
72 | struct perf_thread_map *threads) | |
ef1d1af2 | 73 | { |
4562a739 | 74 | perf_evlist__init(&evlist->core); |
453fa030 | 75 | perf_evlist__set_maps(&evlist->core, cpus, threads); |
35b9d88e | 76 | evlist->workload.pid = -1; |
54cc54de | 77 | evlist->bkw_mmap_state = BKW_MMAP_NOTREADY; |
8ab705b5 AB |
78 | evlist->ctl_fd.fd = -1; |
79 | evlist->ctl_fd.ack = -1; | |
80 | evlist->ctl_fd.pos = -1; | |
ef1d1af2 ACM |
81 | } |
82 | ||
0f98b11c | 83 | struct evlist *evlist__new(void) |
361c99a6 | 84 | { |
63503dba | 85 | struct evlist *evlist = zalloc(sizeof(*evlist)); |
361c99a6 | 86 | |
ef1d1af2 | 87 | if (evlist != NULL) |
52c86bca | 88 | evlist__init(evlist, NULL, NULL); |
361c99a6 ACM |
89 | |
90 | return evlist; | |
91 | } | |
92 | ||
606e2c29 | 93 | struct evlist *evlist__new_default(void) |
b22d54b0 | 94 | { |
0f98b11c | 95 | struct evlist *evlist = evlist__new(); |
7b100989 IR |
96 | bool can_profile_kernel; |
97 | int err; | |
98 | ||
99 | if (!evlist) | |
100 | return NULL; | |
b22d54b0 | 101 | |
7b100989 IR |
102 | can_profile_kernel = perf_event_paranoid_check(1); |
103 | err = parse_event(evlist, can_profile_kernel ? "cycles:P" : "cycles:Pu"); | |
104 | if (err) { | |
c12995a5 | 105 | evlist__delete(evlist); |
7814fe24 JC |
106 | return NULL; |
107 | } | |
108 | ||
109 | if (evlist->core.nr_entries > 1) { | |
110 | struct evsel *evsel; | |
111 | ||
112 | evlist__for_each_entry(evlist, evsel) | |
113 | evsel__set_sample_id(evsel, /*can_sample_identifier=*/false); | |
b22d54b0 JO |
114 | } |
115 | ||
116 | return evlist; | |
117 | } | |
118 | ||
606e2c29 | 119 | struct evlist *evlist__new_dummy(void) |
5bae0250 | 120 | { |
0f98b11c | 121 | struct evlist *evlist = evlist__new(); |
5bae0250 | 122 | |
e251abee | 123 | if (evlist && evlist__add_dummy(evlist)) { |
c12995a5 | 124 | evlist__delete(evlist); |
5bae0250 ACM |
125 | evlist = NULL; |
126 | } | |
127 | ||
128 | return evlist; | |
129 | } | |
130 | ||
75562573 | 131 | /** |
0a7e7ec9 | 132 | * evlist__set_id_pos - set the positions of event ids. |
75562573 AH |
133 | * @evlist: selected event list |
134 | * | |
135 | * Events with compatible sample types all have the same id_pos | |
136 | * and is_pos. For convenience, put a copy on evlist. | |
137 | */ | |
0a7e7ec9 | 138 | void evlist__set_id_pos(struct evlist *evlist) |
75562573 | 139 | { |
515dbe48 | 140 | struct evsel *first = evlist__first(evlist); |
75562573 AH |
141 | |
142 | evlist->id_pos = first->id_pos; | |
143 | evlist->is_pos = first->is_pos; | |
144 | } | |
145 | ||
0a7e7ec9 | 146 | static void evlist__update_id_pos(struct evlist *evlist) |
733cd2fe | 147 | { |
32dcd021 | 148 | struct evsel *evsel; |
733cd2fe | 149 | |
e5cadb93 | 150 | evlist__for_each_entry(evlist, evsel) |
4b5e87b7 | 151 | evsel__calc_id_pos(evsel); |
733cd2fe | 152 | |
0a7e7ec9 | 153 | evlist__set_id_pos(evlist); |
733cd2fe AH |
154 | } |
155 | ||
e6b1878d | 156 | static void evlist__purge(struct evlist *evlist) |
361c99a6 | 157 | { |
32dcd021 | 158 | struct evsel *pos, *n; |
361c99a6 | 159 | |
e5cadb93 | 160 | evlist__for_each_entry_safe(evlist, n, pos) { |
b27c4ece | 161 | list_del_init(&pos->core.node); |
d49e4695 | 162 | pos->evlist = NULL; |
5eb2dd2a | 163 | evsel__delete(pos); |
361c99a6 ACM |
164 | } |
165 | ||
6484d2f9 | 166 | evlist->core.nr_entries = 0; |
361c99a6 ACM |
167 | } |
168 | ||
470579b0 | 169 | void evlist__exit(struct evlist *evlist) |
361c99a6 | 170 | { |
6657a099 | 171 | event_enable_timer__exit(&evlist->eet); |
04662523 | 172 | zfree(&evlist->mmap); |
0b72d69a | 173 | zfree(&evlist->overwrite_mmap); |
93dd6e28 | 174 | perf_evlist__exit(&evlist->core); |
ef1d1af2 ACM |
175 | } |
176 | ||
c12995a5 | 177 | void evlist__delete(struct evlist *evlist) |
ef1d1af2 | 178 | { |
0b04b3dc ACM |
179 | if (evlist == NULL) |
180 | return; | |
181 | ||
ac873ac3 | 182 | evlist__free_stats(evlist); |
db6b7b13 | 183 | evlist__munmap(evlist); |
750b4ede | 184 | evlist__close(evlist); |
e6b1878d | 185 | evlist__purge(evlist); |
470579b0 | 186 | evlist__exit(evlist); |
361c99a6 ACM |
187 | free(evlist); |
188 | } | |
189 | ||
a1cf3a75 | 190 | void evlist__add(struct evlist *evlist, struct evsel *entry) |
361c99a6 | 191 | { |
6484d2f9 | 192 | perf_evlist__add(&evlist->core, &entry->core); |
38fe0e01 JO |
193 | entry->evlist = evlist; |
194 | entry->tracking = !entry->core.idx; | |
6484d2f9 JO |
195 | |
196 | if (evlist->core.nr_entries == 1) | |
0a7e7ec9 | 197 | evlist__set_id_pos(evlist); |
361c99a6 ACM |
198 | } |
199 | ||
16251027 | 200 | void evlist__remove(struct evlist *evlist, struct evsel *evsel) |
4768230a AH |
201 | { |
202 | evsel->evlist = NULL; | |
52e22fb8 | 203 | perf_evlist__remove(&evlist->core, &evsel->core); |
4768230a AH |
204 | } |
205 | ||
e414fd1a | 206 | void evlist__splice_list_tail(struct evlist *evlist, struct list_head *list) |
50d08e47 | 207 | { |
6d2783fe JG |
208 | while (!list_empty(list)) { |
209 | struct evsel *evsel, *temp, *leader = NULL; | |
210 | ||
211 | __evlist__for_each_entry_safe(list, temp, evsel) { | |
212 | list_del_init(&evsel->core.node); | |
213 | evlist__add(evlist, evsel); | |
214 | leader = evsel; | |
215 | break; | |
216 | } | |
217 | ||
218 | __evlist__for_each_entry_safe(list, temp, evsel) { | |
fba7c866 | 219 | if (evsel__has_leader(evsel, leader)) { |
6d2783fe JG |
220 | list_del_init(&evsel->core.node); |
221 | evlist__add(evlist, evsel); | |
222 | } | |
223 | } | |
f114d6ef | 224 | } |
50d08e47 ACM |
225 | } |
226 | ||
c0e53476 ACM |
227 | int __evlist__set_tracepoints_handlers(struct evlist *evlist, |
228 | const struct evsel_str_handler *assocs, size_t nr_assocs) | |
229 | { | |
c0e53476 ACM |
230 | size_t i; |
231 | int err; | |
232 | ||
233 | for (i = 0; i < nr_assocs; i++) { | |
234 | // Adding a handler for an event not in this evlist, just ignore it. | |
b02736f7 | 235 | struct evsel *evsel = evlist__find_tracepoint_by_name(evlist, assocs[i].name); |
c0e53476 ACM |
236 | if (evsel == NULL) |
237 | continue; | |
238 | ||
239 | err = -EEXIST; | |
240 | if (evsel->handler != NULL) | |
241 | goto out; | |
242 | evsel->handler = assocs[i].handler; | |
243 | } | |
244 | ||
245 | err = 0; | |
246 | out: | |
247 | return err; | |
248 | } | |
249 | ||
5f8f9567 | 250 | static void evlist__set_leader(struct evlist *evlist) |
6a4bb04c | 251 | { |
2e6263ab | 252 | perf_evlist__set_leader(&evlist->core); |
6a4bb04c JO |
253 | } |
254 | ||
82944899 | 255 | static struct evsel *evlist__dummy_event(struct evlist *evlist) |
5bae0250 ACM |
256 | { |
257 | struct perf_event_attr attr = { | |
258 | .type = PERF_TYPE_SOFTWARE, | |
259 | .config = PERF_COUNT_SW_DUMMY, | |
260 | .size = sizeof(attr), /* to capture ABI version */ | |
f9cdeb58 IR |
261 | /* Avoid frequency mode for dummy events to avoid associated timers. */ |
262 | .freq = 0, | |
263 | .sample_period = 1, | |
5bae0250 | 264 | }; |
82944899 AH |
265 | |
266 | return evsel__new_idx(&attr, evlist->core.nr_entries); | |
267 | } | |
268 | ||
269 | int evlist__add_dummy(struct evlist *evlist) | |
270 | { | |
271 | struct evsel *evsel = evlist__dummy_event(evlist); | |
5bae0250 ACM |
272 | |
273 | if (evsel == NULL) | |
274 | return -ENOMEM; | |
275 | ||
a1cf3a75 | 276 | evlist__add(evlist, evsel); |
5bae0250 ACM |
277 | return 0; |
278 | } | |
279 | ||
126d68fd AH |
280 | struct evsel *evlist__add_aux_dummy(struct evlist *evlist, bool system_wide) |
281 | { | |
282 | struct evsel *evsel = evlist__dummy_event(evlist); | |
283 | ||
284 | if (!evsel) | |
285 | return NULL; | |
286 | ||
287 | evsel->core.attr.exclude_kernel = 1; | |
288 | evsel->core.attr.exclude_guest = 1; | |
289 | evsel->core.attr.exclude_hv = 1; | |
60ea006f | 290 | evsel->core.system_wide = system_wide; |
126d68fd AH |
291 | evsel->no_aux_samples = true; |
292 | evsel->name = strdup("dummy:u"); | |
293 | ||
60ea006f | 294 | evlist__add(evlist, evsel); |
126d68fd AH |
295 | return evsel; |
296 | } | |
297 | ||
378ef0f5 | 298 | #ifdef HAVE_LIBTRACEEVENT |
182bb594 NK |
299 | struct evsel *evlist__add_sched_switch(struct evlist *evlist, bool system_wide) |
300 | { | |
301 | struct evsel *evsel = evsel__newtp_idx("sched", "sched_switch", 0); | |
302 | ||
303 | if (IS_ERR(evsel)) | |
304 | return evsel; | |
305 | ||
306 | evsel__set_sample_bit(evsel, CPU); | |
307 | evsel__set_sample_bit(evsel, TIME); | |
308 | ||
309 | evsel->core.system_wide = system_wide; | |
310 | evsel->no_aux_samples = true; | |
311 | ||
312 | evlist__add(evlist, evsel); | |
313 | return evsel; | |
378ef0f5 IR |
314 | } |
315 | #endif | |
182bb594 | 316 | |
cdb204ad | 317 | int evlist__add_attrs(struct evlist *evlist, struct perf_event_attr *attrs, size_t nr_attrs) |
50d08e47 | 318 | { |
32dcd021 | 319 | struct evsel *evsel, *n; |
50d08e47 ACM |
320 | LIST_HEAD(head); |
321 | size_t i; | |
322 | ||
323 | for (i = 0; i < nr_attrs; i++) { | |
8f6725a2 | 324 | evsel = evsel__new_idx(attrs + i, evlist->core.nr_entries + i); |
50d08e47 ACM |
325 | if (evsel == NULL) |
326 | goto out_delete_partial_list; | |
b27c4ece | 327 | list_add_tail(&evsel->core.node, &head); |
50d08e47 ACM |
328 | } |
329 | ||
e414fd1a | 330 | evlist__splice_list_tail(evlist, &head); |
50d08e47 ACM |
331 | |
332 | return 0; | |
333 | ||
334 | out_delete_partial_list: | |
e5cadb93 | 335 | __evlist__for_each_entry_safe(&head, n, evsel) |
5eb2dd2a | 336 | evsel__delete(evsel); |
50d08e47 ACM |
337 | return -1; |
338 | } | |
339 | ||
e251abee | 340 | int __evlist__add_default_attrs(struct evlist *evlist, struct perf_event_attr *attrs, size_t nr_attrs) |
79695e1b ACM |
341 | { |
342 | size_t i; | |
343 | ||
344 | for (i = 0; i < nr_attrs; i++) | |
345 | event_attr_init(attrs + i); | |
346 | ||
a1cf3a75 | 347 | return evlist__add_attrs(evlist, attrs, nr_attrs); |
79695e1b ACM |
348 | } |
349 | ||
a9c1ecda KL |
350 | __weak int arch_evlist__add_default_attrs(struct evlist *evlist, |
351 | struct perf_event_attr *attrs, | |
352 | size_t nr_attrs) | |
42641d6f | 353 | { |
a9c1ecda KL |
354 | if (!nr_attrs) |
355 | return 0; | |
356 | ||
357 | return __evlist__add_default_attrs(evlist, attrs, nr_attrs); | |
42641d6f KL |
358 | } |
359 | ||
b02736f7 | 360 | struct evsel *evlist__find_tracepoint_by_id(struct evlist *evlist, int id) |
ee29be62 | 361 | { |
32dcd021 | 362 | struct evsel *evsel; |
ee29be62 | 363 | |
e5cadb93 | 364 | evlist__for_each_entry(evlist, evsel) { |
1fc632ce JO |
365 | if (evsel->core.attr.type == PERF_TYPE_TRACEPOINT && |
366 | (int)evsel->core.attr.config == id) | |
ee29be62 ACM |
367 | return evsel; |
368 | } | |
369 | ||
370 | return NULL; | |
371 | } | |
372 | ||
b02736f7 | 373 | struct evsel *evlist__find_tracepoint_by_name(struct evlist *evlist, const char *name) |
a2f2804a | 374 | { |
32dcd021 | 375 | struct evsel *evsel; |
a2f2804a | 376 | |
e5cadb93 | 377 | evlist__for_each_entry(evlist, evsel) { |
1fc632ce | 378 | if ((evsel->core.attr.type == PERF_TYPE_TRACEPOINT) && |
a2f2804a DA |
379 | (strcmp(evsel->name, name) == 0)) |
380 | return evsel; | |
381 | } | |
382 | ||
383 | return NULL; | |
384 | } | |
385 | ||
378ef0f5 | 386 | #ifdef HAVE_LIBTRACEEVENT |
e251abee | 387 | int evlist__add_newtp(struct evlist *evlist, const char *sys, const char *name, void *handler) |
39876e7d | 388 | { |
8f6725a2 | 389 | struct evsel *evsel = evsel__newtp(sys, name); |
39876e7d | 390 | |
8dd2a131 | 391 | if (IS_ERR(evsel)) |
39876e7d ACM |
392 | return -1; |
393 | ||
744a9719 | 394 | evsel->handler = handler; |
a1cf3a75 | 395 | evlist__add(evlist, evsel); |
39876e7d ACM |
396 | return 0; |
397 | } | |
378ef0f5 | 398 | #endif |
39876e7d | 399 | |
472832d2 IR |
400 | struct evlist_cpu_iterator evlist__cpu_begin(struct evlist *evlist, struct affinity *affinity) |
401 | { | |
402 | struct evlist_cpu_iterator itr = { | |
403 | .container = evlist, | |
8b464eac | 404 | .evsel = NULL, |
472832d2 IR |
405 | .cpu_map_idx = 0, |
406 | .evlist_cpu_map_idx = 0, | |
407 | .evlist_cpu_map_nr = perf_cpu_map__nr(evlist->core.all_cpus), | |
6d18804b | 408 | .cpu = (struct perf_cpu){ .cpu = -1}, |
472832d2 IR |
409 | .affinity = affinity, |
410 | }; | |
a8cbe40f | 411 | |
8b464eac IR |
412 | if (evlist__empty(evlist)) { |
413 | /* Ensure the empty list doesn't iterate. */ | |
414 | itr.evlist_cpu_map_idx = itr.evlist_cpu_map_nr; | |
415 | } else { | |
416 | itr.evsel = evlist__first(evlist); | |
417 | if (itr.affinity) { | |
418 | itr.cpu = perf_cpu_map__cpu(evlist->core.all_cpus, 0); | |
419 | affinity__set(itr.affinity, itr.cpu.cpu); | |
420 | itr.cpu_map_idx = perf_cpu_map__idx(itr.evsel->core.cpus, itr.cpu); | |
421 | /* | |
422 | * If this CPU isn't in the evsel's cpu map then advance | |
423 | * through the list. | |
424 | */ | |
425 | if (itr.cpu_map_idx == -1) | |
426 | evlist_cpu_iterator__next(&itr); | |
427 | } | |
472832d2 IR |
428 | } |
429 | return itr; | |
a8cbe40f AK |
430 | } |
431 | ||
472832d2 | 432 | void evlist_cpu_iterator__next(struct evlist_cpu_iterator *evlist_cpu_itr) |
a8cbe40f | 433 | { |
472832d2 IR |
434 | while (evlist_cpu_itr->evsel != evlist__last(evlist_cpu_itr->container)) { |
435 | evlist_cpu_itr->evsel = evsel__next(evlist_cpu_itr->evsel); | |
436 | evlist_cpu_itr->cpu_map_idx = | |
437 | perf_cpu_map__idx(evlist_cpu_itr->evsel->core.cpus, | |
438 | evlist_cpu_itr->cpu); | |
439 | if (evlist_cpu_itr->cpu_map_idx != -1) | |
440 | return; | |
441 | } | |
442 | evlist_cpu_itr->evlist_cpu_map_idx++; | |
443 | if (evlist_cpu_itr->evlist_cpu_map_idx < evlist_cpu_itr->evlist_cpu_map_nr) { | |
444 | evlist_cpu_itr->evsel = evlist__first(evlist_cpu_itr->container); | |
445 | evlist_cpu_itr->cpu = | |
446 | perf_cpu_map__cpu(evlist_cpu_itr->container->core.all_cpus, | |
447 | evlist_cpu_itr->evlist_cpu_map_idx); | |
448 | if (evlist_cpu_itr->affinity) | |
6d18804b | 449 | affinity__set(evlist_cpu_itr->affinity, evlist_cpu_itr->cpu.cpu); |
472832d2 IR |
450 | evlist_cpu_itr->cpu_map_idx = |
451 | perf_cpu_map__idx(evlist_cpu_itr->evsel->core.cpus, | |
452 | evlist_cpu_itr->cpu); | |
453 | /* | |
454 | * If this CPU isn't in the evsel's cpu map then advance through | |
455 | * the list. | |
456 | */ | |
457 | if (evlist_cpu_itr->cpu_map_idx == -1) | |
458 | evlist_cpu_iterator__next(evlist_cpu_itr); | |
459 | } | |
a8cbe40f AK |
460 | } |
461 | ||
472832d2 | 462 | bool evlist_cpu_iterator__end(const struct evlist_cpu_iterator *evlist_cpu_itr) |
a8cbe40f | 463 | { |
472832d2 | 464 | return evlist_cpu_itr->evlist_cpu_map_idx >= evlist_cpu_itr->evlist_cpu_map_nr; |
a8cbe40f AK |
465 | } |
466 | ||
7cfcd1e0 JO |
467 | static int evsel__strcmp(struct evsel *pos, char *evsel_name) |
468 | { | |
469 | if (!evsel_name) | |
470 | return 0; | |
471 | if (evsel__is_dummy_event(pos)) | |
472 | return 1; | |
ce1d3bc2 | 473 | return !evsel__name_is(pos, evsel_name); |
7cfcd1e0 JO |
474 | } |
475 | ||
476 | static int evlist__is_enabled(struct evlist *evlist) | |
477 | { | |
478 | struct evsel *pos; | |
479 | ||
480 | evlist__for_each_entry(evlist, pos) { | |
481 | if (!evsel__is_group_leader(pos) || !pos->core.fd) | |
482 | continue; | |
483 | /* If at least one event is enabled, evlist is enabled. */ | |
484 | if (!pos->disabled) | |
485 | return true; | |
486 | } | |
487 | return false; | |
488 | } | |
489 | ||
329725d5 | 490 | static void __evlist__disable(struct evlist *evlist, char *evsel_name, bool excl_dummy) |
4152ab37 | 491 | { |
32dcd021 | 492 | struct evsel *pos; |
472832d2 | 493 | struct evlist_cpu_iterator evlist_cpu_itr; |
0d3d2376 | 494 | struct affinity saved_affinity, *affinity = NULL; |
87cf8360 | 495 | bool has_imm = false; |
3e27c920 | 496 | |
0d3d2376 | 497 | // See explanation in evlist__close() |
0df6ade7 | 498 | if (!cpu_map__is_dummy(evlist->core.user_requested_cpus)) { |
0d3d2376 ACM |
499 | if (affinity__setup(&saved_affinity) < 0) |
500 | return; | |
501 | affinity = &saved_affinity; | |
502 | } | |
704e2f5b | 503 | |
87cf8360 | 504 | /* Disable 'immediate' events last */ |
472832d2 | 505 | for (int imm = 0; imm <= 1; imm++) { |
0d3d2376 | 506 | evlist__for_each_cpu(evlist_cpu_itr, evlist, affinity) { |
472832d2 IR |
507 | pos = evlist_cpu_itr.evsel; |
508 | if (evsel__strcmp(pos, evsel_name)) | |
509 | continue; | |
510 | if (pos->disabled || !evsel__is_group_leader(pos) || !pos->core.fd) | |
511 | continue; | |
329725d5 AH |
512 | if (excl_dummy && evsel__is_dummy_event(pos)) |
513 | continue; | |
472832d2 IR |
514 | if (pos->immediate) |
515 | has_imm = true; | |
516 | if (pos->immediate != imm) | |
517 | continue; | |
518 | evsel__disable_cpu(pos, evlist_cpu_itr.cpu_map_idx); | |
704e2f5b | 519 | } |
87cf8360 AH |
520 | if (!has_imm) |
521 | break; | |
704e2f5b | 522 | } |
87cf8360 | 523 | |
0d3d2376 | 524 | affinity__cleanup(affinity); |
e5cadb93 | 525 | evlist__for_each_entry(evlist, pos) { |
7cfcd1e0 JO |
526 | if (evsel__strcmp(pos, evsel_name)) |
527 | continue; | |
c754c382 | 528 | if (!evsel__is_group_leader(pos) || !pos->core.fd) |
3e27c920 | 529 | continue; |
329725d5 AH |
530 | if (excl_dummy && evsel__is_dummy_event(pos)) |
531 | continue; | |
704e2f5b | 532 | pos->disabled = true; |
4152ab37 | 533 | } |
2b56bcfb | 534 | |
7cfcd1e0 JO |
535 | /* |
536 | * If we disabled only single event, we need to check | |
537 | * the enabled state of the evlist manually. | |
538 | */ | |
539 | if (evsel_name) | |
540 | evlist->enabled = evlist__is_enabled(evlist); | |
541 | else | |
542 | evlist->enabled = false; | |
4152ab37 ACM |
543 | } |
544 | ||
7cfcd1e0 JO |
545 | void evlist__disable(struct evlist *evlist) |
546 | { | |
329725d5 AH |
547 | __evlist__disable(evlist, NULL, false); |
548 | } | |
549 | ||
550 | void evlist__disable_non_dummy(struct evlist *evlist) | |
551 | { | |
552 | __evlist__disable(evlist, NULL, true); | |
7cfcd1e0 JO |
553 | } |
554 | ||
555 | void evlist__disable_evsel(struct evlist *evlist, char *evsel_name) | |
556 | { | |
329725d5 | 557 | __evlist__disable(evlist, evsel_name, false); |
7cfcd1e0 JO |
558 | } |
559 | ||
329725d5 | 560 | static void __evlist__enable(struct evlist *evlist, char *evsel_name, bool excl_dummy) |
764e16a3 | 561 | { |
32dcd021 | 562 | struct evsel *pos; |
472832d2 | 563 | struct evlist_cpu_iterator evlist_cpu_itr; |
f350ee95 | 564 | struct affinity saved_affinity, *affinity = NULL; |
3e27c920 | 565 | |
f350ee95 | 566 | // See explanation in evlist__close() |
0df6ade7 | 567 | if (!cpu_map__is_dummy(evlist->core.user_requested_cpus)) { |
f350ee95 ACM |
568 | if (affinity__setup(&saved_affinity) < 0) |
569 | return; | |
570 | affinity = &saved_affinity; | |
571 | } | |
704e2f5b | 572 | |
f350ee95 | 573 | evlist__for_each_cpu(evlist_cpu_itr, evlist, affinity) { |
472832d2 IR |
574 | pos = evlist_cpu_itr.evsel; |
575 | if (evsel__strcmp(pos, evsel_name)) | |
576 | continue; | |
577 | if (!evsel__is_group_leader(pos) || !pos->core.fd) | |
578 | continue; | |
329725d5 AH |
579 | if (excl_dummy && evsel__is_dummy_event(pos)) |
580 | continue; | |
472832d2 | 581 | evsel__enable_cpu(pos, evlist_cpu_itr.cpu_map_idx); |
704e2f5b | 582 | } |
f350ee95 | 583 | affinity__cleanup(affinity); |
e5cadb93 | 584 | evlist__for_each_entry(evlist, pos) { |
7cfcd1e0 JO |
585 | if (evsel__strcmp(pos, evsel_name)) |
586 | continue; | |
c754c382 | 587 | if (!evsel__is_group_leader(pos) || !pos->core.fd) |
3e27c920 | 588 | continue; |
329725d5 AH |
589 | if (excl_dummy && evsel__is_dummy_event(pos)) |
590 | continue; | |
704e2f5b | 591 | pos->disabled = false; |
764e16a3 | 592 | } |
2b56bcfb | 593 | |
7cfcd1e0 JO |
594 | /* |
595 | * Even single event sets the 'enabled' for evlist, | |
596 | * so the toggle can work properly and toggle to | |
597 | * 'disabled' state. | |
598 | */ | |
2b56bcfb ACM |
599 | evlist->enabled = true; |
600 | } | |
601 | ||
7cfcd1e0 JO |
602 | void evlist__enable(struct evlist *evlist) |
603 | { | |
329725d5 AH |
604 | __evlist__enable(evlist, NULL, false); |
605 | } | |
606 | ||
607 | void evlist__enable_non_dummy(struct evlist *evlist) | |
608 | { | |
609 | __evlist__enable(evlist, NULL, true); | |
7cfcd1e0 JO |
610 | } |
611 | ||
612 | void evlist__enable_evsel(struct evlist *evlist, char *evsel_name) | |
613 | { | |
329725d5 | 614 | __evlist__enable(evlist, evsel_name, false); |
7cfcd1e0 JO |
615 | } |
616 | ||
ade9d208 | 617 | void evlist__toggle_enable(struct evlist *evlist) |
2b56bcfb | 618 | { |
e74676de | 619 | (evlist->enabled ? evlist__disable : evlist__enable)(evlist); |
764e16a3 DA |
620 | } |
621 | ||
f4009e7b | 622 | int evlist__add_pollfd(struct evlist *evlist, int fd) |
70082dd9 | 623 | { |
ab4c1f9f | 624 | return perf_evlist__add_pollfd(&evlist->core, fd, NULL, POLLIN, fdarray_flag__default); |
e4b356b5 ACM |
625 | } |
626 | ||
f4009e7b | 627 | int evlist__filter_pollfd(struct evlist *evlist, short revents_and_mask) |
1ddec7f0 | 628 | { |
84227cb1 | 629 | return perf_evlist__filter_pollfd(&evlist->core, revents_and_mask); |
1ddec7f0 ACM |
630 | } |
631 | ||
e16c2ce7 YJ |
632 | #ifdef HAVE_EVENTFD_SUPPORT |
633 | int evlist__add_wakeup_eventfd(struct evlist *evlist, int fd) | |
634 | { | |
635 | return perf_evlist__add_pollfd(&evlist->core, fd, NULL, POLLIN, | |
a032ad87 AH |
636 | fdarray_flag__nonfilterable | |
637 | fdarray_flag__non_perf_event); | |
e16c2ce7 YJ |
638 | } |
639 | #endif | |
640 | ||
80ab2987 | 641 | int evlist__poll(struct evlist *evlist, int timeout) |
f66a889d | 642 | { |
80ab2987 | 643 | return perf_evlist__poll(&evlist->core, timeout); |
f66a889d ACM |
644 | } |
645 | ||
3ccf8a7b | 646 | struct perf_sample_id *evlist__id2sid(struct evlist *evlist, u64 id) |
70db7533 ACM |
647 | { |
648 | struct hlist_head *head; | |
70db7533 ACM |
649 | struct perf_sample_id *sid; |
650 | int hash; | |
651 | ||
70db7533 | 652 | hash = hash_64(id, PERF_EVLIST__HLIST_BITS); |
1d5af02d | 653 | head = &evlist->core.heads[hash]; |
70db7533 | 654 | |
b67bfe0d | 655 | hlist_for_each_entry(sid, head, node) |
70db7533 | 656 | if (sid->id == id) |
932a3594 JO |
657 | return sid; |
658 | ||
659 | return NULL; | |
660 | } | |
661 | ||
3ccf8a7b | 662 | struct evsel *evlist__id2evsel(struct evlist *evlist, u64 id) |
932a3594 JO |
663 | { |
664 | struct perf_sample_id *sid; | |
665 | ||
6484d2f9 | 666 | if (evlist->core.nr_entries == 1 || !id) |
515dbe48 | 667 | return evlist__first(evlist); |
932a3594 | 668 | |
3ccf8a7b | 669 | sid = evlist__id2sid(evlist, id); |
932a3594 | 670 | if (sid) |
70c20369 | 671 | return container_of(sid->evsel, struct evsel, core); |
30e68bcc | 672 | |
8cedf3a5 | 673 | if (!evlist__sample_id_all(evlist)) |
515dbe48 | 674 | return evlist__first(evlist); |
30e68bcc | 675 | |
70db7533 ACM |
676 | return NULL; |
677 | } | |
04391deb | 678 | |
3ccf8a7b | 679 | struct evsel *evlist__id2evsel_strict(struct evlist *evlist, u64 id) |
dddcf6ab AH |
680 | { |
681 | struct perf_sample_id *sid; | |
682 | ||
683 | if (!id) | |
684 | return NULL; | |
685 | ||
3ccf8a7b | 686 | sid = evlist__id2sid(evlist, id); |
dddcf6ab | 687 | if (sid) |
70c20369 | 688 | return container_of(sid->evsel, struct evsel, core); |
dddcf6ab AH |
689 | |
690 | return NULL; | |
691 | } | |
692 | ||
3ccf8a7b | 693 | static int evlist__event2id(struct evlist *evlist, union perf_event *event, u64 *id) |
75562573 | 694 | { |
b1fcd190 | 695 | const __u64 *array = event->sample.array; |
75562573 AH |
696 | ssize_t n; |
697 | ||
698 | n = (event->header.size - sizeof(event->header)) >> 3; | |
699 | ||
700 | if (event->header.type == PERF_RECORD_SAMPLE) { | |
701 | if (evlist->id_pos >= n) | |
702 | return -1; | |
703 | *id = array[evlist->id_pos]; | |
704 | } else { | |
705 | if (evlist->is_pos > n) | |
706 | return -1; | |
707 | n -= evlist->is_pos; | |
708 | *id = array[n]; | |
709 | } | |
710 | return 0; | |
711 | } | |
712 | ||
3ccf8a7b | 713 | struct evsel *evlist__event2evsel(struct evlist *evlist, union perf_event *event) |
75562573 | 714 | { |
515dbe48 | 715 | struct evsel *first = evlist__first(evlist); |
75562573 AH |
716 | struct hlist_head *head; |
717 | struct perf_sample_id *sid; | |
718 | int hash; | |
719 | u64 id; | |
720 | ||
6484d2f9 | 721 | if (evlist->core.nr_entries == 1) |
98be6966 AH |
722 | return first; |
723 | ||
1fc632ce | 724 | if (!first->core.attr.sample_id_all && |
98be6966 AH |
725 | event->header.type != PERF_RECORD_SAMPLE) |
726 | return first; | |
75562573 | 727 | |
3ccf8a7b | 728 | if (evlist__event2id(evlist, event, &id)) |
75562573 AH |
729 | return NULL; |
730 | ||
731 | /* Synthesized events have an id of zero */ | |
732 | if (!id) | |
98be6966 | 733 | return first; |
75562573 AH |
734 | |
735 | hash = hash_64(id, PERF_EVLIST__HLIST_BITS); | |
1d5af02d | 736 | head = &evlist->core.heads[hash]; |
75562573 AH |
737 | |
738 | hlist_for_each_entry(sid, head, node) { | |
739 | if (sid->id == id) | |
70c20369 | 740 | return container_of(sid->evsel, struct evsel, core); |
75562573 AH |
741 | } |
742 | return NULL; | |
743 | } | |
744 | ||
0a60b339 | 745 | static int evlist__set_paused(struct evlist *evlist, bool value) |
65aea233 WN |
746 | { |
747 | int i; | |
748 | ||
0b72d69a | 749 | if (!evlist->overwrite_mmap) |
078c3386 WN |
750 | return 0; |
751 | ||
c976ee11 | 752 | for (i = 0; i < evlist->core.nr_mmaps; i++) { |
2cf07b29 | 753 | int fd = evlist->overwrite_mmap[i].core.fd; |
65aea233 WN |
754 | int err; |
755 | ||
756 | if (fd < 0) | |
757 | continue; | |
758 | err = ioctl(fd, PERF_EVENT_IOC_PAUSE_OUTPUT, value ? 1 : 0); | |
759 | if (err) | |
760 | return err; | |
761 | } | |
762 | return 0; | |
763 | } | |
764 | ||
0a60b339 | 765 | static int evlist__pause(struct evlist *evlist) |
65aea233 | 766 | { |
0a60b339 | 767 | return evlist__set_paused(evlist, true); |
65aea233 WN |
768 | } |
769 | ||
0a60b339 | 770 | static int evlist__resume(struct evlist *evlist) |
65aea233 | 771 | { |
0a60b339 | 772 | return evlist__set_paused(evlist, false); |
65aea233 WN |
773 | } |
774 | ||
db6b7b13 | 775 | static void evlist__munmap_nofree(struct evlist *evlist) |
f8a95309 | 776 | { |
aece948f | 777 | int i; |
f8a95309 | 778 | |
b2cb615d | 779 | if (evlist->mmap) |
c976ee11 | 780 | for (i = 0; i < evlist->core.nr_mmaps; i++) |
80e53d11 | 781 | perf_mmap__munmap(&evlist->mmap[i].core); |
983874d1 | 782 | |
0b72d69a | 783 | if (evlist->overwrite_mmap) |
c976ee11 | 784 | for (i = 0; i < evlist->core.nr_mmaps; i++) |
80e53d11 | 785 | perf_mmap__munmap(&evlist->overwrite_mmap[i].core); |
a1f72618 | 786 | } |
aece948f | 787 | |
db6b7b13 | 788 | void evlist__munmap(struct evlist *evlist) |
a1f72618 | 789 | { |
db6b7b13 | 790 | evlist__munmap_nofree(evlist); |
04662523 | 791 | zfree(&evlist->mmap); |
0b72d69a | 792 | zfree(&evlist->overwrite_mmap); |
f8a95309 ACM |
793 | } |
794 | ||
80e53d11 JO |
795 | static void perf_mmap__unmap_cb(struct perf_mmap *map) |
796 | { | |
797 | struct mmap *m = container_of(map, struct mmap, core); | |
798 | ||
799 | mmap__munmap(m); | |
800 | } | |
801 | ||
d50cf361 JO |
802 | static struct mmap *evlist__alloc_mmap(struct evlist *evlist, |
803 | bool overwrite) | |
f8a95309 | 804 | { |
d4c6fb36 | 805 | int i; |
a5830532 | 806 | struct mmap *map; |
d4c6fb36 | 807 | |
c976ee11 | 808 | map = zalloc(evlist->core.nr_mmaps * sizeof(struct mmap)); |
8db6d6b1 WN |
809 | if (!map) |
810 | return NULL; | |
946ae1d4 | 811 | |
c976ee11 | 812 | for (i = 0; i < evlist->core.nr_mmaps; i++) { |
6eb65f7a JO |
813 | struct perf_mmap *prev = i ? &map[i - 1].core : NULL; |
814 | ||
4738ca30 ACM |
815 | /* |
816 | * When the perf_mmap() call is made we grab one refcount, plus | |
6afad54d | 817 | * one extra to let perf_mmap__consume() get the last |
4738ca30 ACM |
818 | * events after all real references (perf_mmap__get()) are |
819 | * dropped. | |
820 | * | |
821 | * Each PERF_EVENT_IOC_SET_OUTPUT points to this mmap and | |
822 | * thus does perf_mmap__get() on it. | |
823 | */ | |
6eb65f7a | 824 | perf_mmap__init(&map[i].core, prev, overwrite, perf_mmap__unmap_cb); |
4738ca30 | 825 | } |
353120b4 | 826 | |
8db6d6b1 | 827 | return map; |
f8a95309 ACM |
828 | } |
829 | ||
9abd2ab2 JO |
830 | static void |
831 | perf_evlist__mmap_cb_idx(struct perf_evlist *_evlist, | |
d01508f2 | 832 | struct perf_evsel *_evsel, |
9abd2ab2 | 833 | struct perf_mmap_param *_mp, |
6a7b8a5a | 834 | int idx) |
9abd2ab2 JO |
835 | { |
836 | struct evlist *evlist = container_of(_evlist, struct evlist, core); | |
837 | struct mmap_params *mp = container_of(_mp, struct mmap_params, core); | |
d01508f2 | 838 | struct evsel *evsel = container_of(_evsel, struct evsel, core); |
9abd2ab2 | 839 | |
84bd5aba | 840 | auxtrace_mmap_params__set_idx(&mp->auxtrace_mp, evlist, evsel, idx); |
9abd2ab2 JO |
841 | } |
842 | ||
bb1b1885 JO |
843 | static struct perf_mmap* |
844 | perf_evlist__mmap_cb_get(struct perf_evlist *_evlist, bool overwrite, int idx) | |
845 | { | |
846 | struct evlist *evlist = container_of(_evlist, struct evlist, core); | |
3805e4f3 | 847 | struct mmap *maps; |
bb1b1885 | 848 | |
3805e4f3 | 849 | maps = overwrite ? evlist->overwrite_mmap : evlist->mmap; |
bb1b1885 | 850 | |
3805e4f3 JO |
851 | if (!maps) { |
852 | maps = evlist__alloc_mmap(evlist, overwrite); | |
853 | if (!maps) | |
854 | return NULL; | |
bb1b1885 | 855 | |
3805e4f3 | 856 | if (overwrite) { |
bb1b1885 JO |
857 | evlist->overwrite_mmap = maps; |
858 | if (evlist->bkw_mmap_state == BKW_MMAP_NOTREADY) | |
ade9d208 | 859 | evlist__toggle_bkw_mmap(evlist, BKW_MMAP_RUNNING); |
3805e4f3 JO |
860 | } else { |
861 | evlist->mmap = maps; | |
bb1b1885 JO |
862 | } |
863 | } | |
864 | ||
865 | return &maps[idx].core; | |
866 | } | |
867 | ||
b80132b1 JO |
868 | static int |
869 | perf_evlist__mmap_cb_mmap(struct perf_mmap *_map, struct perf_mmap_param *_mp, | |
6d18804b | 870 | int output, struct perf_cpu cpu) |
b80132b1 JO |
871 | { |
872 | struct mmap *map = container_of(_map, struct mmap, core); | |
873 | struct mmap_params *mp = container_of(_mp, struct mmap_params, core); | |
874 | ||
875 | return mmap__mmap(map, mp, output, cpu); | |
876 | } | |
877 | ||
f5e7150c | 878 | unsigned long perf_event_mlock_kb_in_pages(void) |
994a1f78 | 879 | { |
f5e7150c ACM |
880 | unsigned long pages; |
881 | int max; | |
8185e881 | 882 | |
f5e7150c ACM |
883 | if (sysctl__read_int("kernel/perf_event_mlock_kb", &max) < 0) { |
884 | /* | |
885 | * Pick a once upon a time good value, i.e. things look | |
886 | * strange since we can't read a sysctl value, but lets not | |
887 | * die yet... | |
888 | */ | |
889 | max = 512; | |
890 | } else { | |
891 | max -= (page_size / 1024); | |
892 | } | |
8185e881 | 893 | |
f5e7150c ACM |
894 | pages = (max * 1024) / page_size; |
895 | if (!is_power_of_2(pages)) | |
896 | pages = rounddown_pow_of_two(pages); | |
897 | ||
898 | return pages; | |
899 | } | |
900 | ||
9521b5f2 | 901 | size_t evlist__mmap_size(unsigned long pages) |
f5e7150c ACM |
902 | { |
903 | if (pages == UINT_MAX) | |
904 | pages = perf_event_mlock_kb_in_pages(); | |
905 | else if (!is_power_of_2(pages)) | |
994a1f78 JO |
906 | return 0; |
907 | ||
908 | return (pages + 1) * page_size; | |
909 | } | |
910 | ||
33c2dcfd DA |
911 | static long parse_pages_arg(const char *str, unsigned long min, |
912 | unsigned long max) | |
994a1f78 | 913 | { |
2fbe4abe | 914 | unsigned long pages, val; |
27050f53 JO |
915 | static struct parse_tag tags[] = { |
916 | { .tag = 'B', .mult = 1 }, | |
917 | { .tag = 'K', .mult = 1 << 10 }, | |
918 | { .tag = 'M', .mult = 1 << 20 }, | |
919 | { .tag = 'G', .mult = 1 << 30 }, | |
920 | { .tag = 0 }, | |
921 | }; | |
994a1f78 | 922 | |
8973504b | 923 | if (str == NULL) |
33c2dcfd | 924 | return -EINVAL; |
8973504b | 925 | |
27050f53 | 926 | val = parse_tag_value(str, tags); |
2fbe4abe | 927 | if (val != (unsigned long) -1) { |
27050f53 JO |
928 | /* we got file size value */ |
929 | pages = PERF_ALIGN(val, page_size) / page_size; | |
27050f53 JO |
930 | } else { |
931 | /* we got pages count value */ | |
932 | char *eptr; | |
933 | pages = strtoul(str, &eptr, 10); | |
33c2dcfd DA |
934 | if (*eptr != '\0') |
935 | return -EINVAL; | |
994a1f78 JO |
936 | } |
937 | ||
2bcab6c1 | 938 | if (pages == 0 && min == 0) { |
33c2dcfd | 939 | /* leave number of pages at 0 */ |
1dbfa938 | 940 | } else if (!is_power_of_2(pages)) { |
9808143b JO |
941 | char buf[100]; |
942 | ||
33c2dcfd | 943 | /* round pages up to next power of 2 */ |
91529834 | 944 | pages = roundup_pow_of_two(pages); |
1dbfa938 AH |
945 | if (!pages) |
946 | return -EINVAL; | |
9808143b JO |
947 | |
948 | unit_number__scnprintf(buf, sizeof(buf), pages * page_size); | |
949 | pr_info("rounding mmap pages size to %s (%lu pages)\n", | |
950 | buf, pages); | |
2fbe4abe AH |
951 | } |
952 | ||
33c2dcfd DA |
953 | if (pages > max) |
954 | return -EINVAL; | |
955 | ||
956 | return pages; | |
957 | } | |
958 | ||
25f84702 | 959 | int __evlist__parse_mmap_pages(unsigned int *mmap_pages, const char *str) |
33c2dcfd | 960 | { |
33c2dcfd DA |
961 | unsigned long max = UINT_MAX; |
962 | long pages; | |
963 | ||
f5ae9c42 | 964 | if (max > SIZE_MAX / page_size) |
33c2dcfd DA |
965 | max = SIZE_MAX / page_size; |
966 | ||
967 | pages = parse_pages_arg(str, 1, max); | |
968 | if (pages < 0) { | |
969 | pr_err("Invalid argument for --mmap_pages/-m\n"); | |
994a1f78 JO |
970 | return -1; |
971 | } | |
972 | ||
973 | *mmap_pages = pages; | |
974 | return 0; | |
975 | } | |
976 | ||
25f84702 | 977 | int evlist__parse_mmap_pages(const struct option *opt, const char *str, int unset __maybe_unused) |
e9db1310 | 978 | { |
25f84702 | 979 | return __evlist__parse_mmap_pages(opt->value, str); |
e9db1310 AH |
980 | } |
981 | ||
c83fa7f2 | 982 | /** |
9521b5f2 | 983 | * evlist__mmap_ex - Create mmaps to receive events. |
c83fa7f2 AH |
984 | * @evlist: list of events |
985 | * @pages: map length in pages | |
986 | * @overwrite: overwrite older events? | |
718c602d AH |
987 | * @auxtrace_pages - auxtrace map length in pages |
988 | * @auxtrace_overwrite - overwrite older auxtrace data? | |
f8a95309 | 989 | * |
c83fa7f2 | 990 | * If @overwrite is %false the user needs to signal event consumption using |
9521b5f2 | 991 | * perf_mmap__write_tail(). Using evlist__mmap_read() does this |
c83fa7f2 | 992 | * automatically. |
7e2ed097 | 993 | * |
718c602d AH |
994 | * Similarly, if @auxtrace_overwrite is %false the user needs to signal data |
995 | * consumption using auxtrace_mmap__write_tail(). | |
996 | * | |
c83fa7f2 | 997 | * Return: %0 on success, negative error code otherwise. |
f8a95309 | 998 | */ |
9521b5f2 | 999 | int evlist__mmap_ex(struct evlist *evlist, unsigned int pages, |
7a276ff6 | 1000 | unsigned int auxtrace_pages, |
51255a8a AB |
1001 | bool auxtrace_overwrite, int nr_cblocks, int affinity, int flush, |
1002 | int comp_level) | |
f8a95309 | 1003 | { |
71f566a3 WN |
1004 | /* |
1005 | * Delay setting mp.prot: set it before calling perf_mmap__mmap. | |
1006 | * Its value is decided by evsel's write_backward. | |
1007 | * So &mp should not be passed through const pointer. | |
1008 | */ | |
e440979f JO |
1009 | struct mmap_params mp = { |
1010 | .nr_cblocks = nr_cblocks, | |
1011 | .affinity = affinity, | |
1012 | .flush = flush, | |
1013 | .comp_level = comp_level | |
1014 | }; | |
923d0f18 | 1015 | struct perf_evlist_mmap_ops ops = { |
b80132b1 JO |
1016 | .idx = perf_evlist__mmap_cb_idx, |
1017 | .get = perf_evlist__mmap_cb_get, | |
1018 | .mmap = perf_evlist__mmap_cb_mmap, | |
9abd2ab2 | 1019 | }; |
50a682ce | 1020 | |
f6fa4375 JO |
1021 | evlist->core.mmap_len = evlist__mmap_size(pages); |
1022 | pr_debug("mmap size %zuB\n", evlist->core.mmap_len); | |
f8a95309 | 1023 | |
f6fa4375 | 1024 | auxtrace_mmap_params__init(&mp.auxtrace_mp, evlist->core.mmap_len, |
718c602d AH |
1025 | auxtrace_pages, auxtrace_overwrite); |
1026 | ||
923d0f18 | 1027 | return perf_evlist__mmap_ops(&evlist->core, &ops, &mp.core); |
f8a95309 | 1028 | } |
7e2ed097 | 1029 | |
9521b5f2 | 1030 | int evlist__mmap(struct evlist *evlist, unsigned int pages) |
718c602d | 1031 | { |
9521b5f2 | 1032 | return evlist__mmap_ex(evlist, pages, 0, false, 0, PERF_AFFINITY_SYS, 1, 0); |
718c602d AH |
1033 | } |
1034 | ||
7748bb71 | 1035 | int evlist__create_maps(struct evlist *evlist, struct target *target) |
7e2ed097 | 1036 | { |
147c508f | 1037 | bool all_threads = (target->per_thread && target->system_wide); |
f854839b | 1038 | struct perf_cpu_map *cpus; |
9749b90e | 1039 | struct perf_thread_map *threads; |
7e2ed097 | 1040 | |
147c508f JY |
1041 | /* |
1042 | * If specify '-a' and '--per-thread' to perf record, perf record | |
1043 | * will override '--per-thread'. target->per_thread = false and | |
1044 | * target->system_wide = true. | |
1045 | * | |
1046 | * If specify '--per-thread' only to perf record, | |
1047 | * target->per_thread = true and target->system_wide = false. | |
1048 | * | |
1049 | * So target->per_thread && target->system_wide is false. | |
1050 | * For perf record, thread_map__new_str doesn't call | |
1051 | * thread_map__new_all_cpus. That will keep perf record's | |
1052 | * current behavior. | |
1053 | * | |
1054 | * For perf stat, it allows the case that target->per_thread and | |
1055 | * target->system_wide are all true. It means to collect system-wide | |
1056 | * per-thread data. thread_map__new_str will call | |
1057 | * thread_map__new_all_cpus to enumerate all threads. | |
1058 | */ | |
73c0ca1e | 1059 | threads = thread_map__new_str(target->pid, target->tid, target->uid, |
147c508f | 1060 | all_threads); |
7e2ed097 | 1061 | |
74bfd2b2 | 1062 | if (!threads) |
7e2ed097 ACM |
1063 | return -1; |
1064 | ||
9c105fbc | 1065 | if (target__uses_dummy_map(target)) |
48219b08 | 1066 | cpus = perf_cpu_map__new_any_cpu(); |
879d77d0 | 1067 | else |
9c3516d1 | 1068 | cpus = perf_cpu_map__new(target->cpu_list); |
7e2ed097 | 1069 | |
74bfd2b2 | 1070 | if (!cpus) |
7e2ed097 ACM |
1071 | goto out_delete_threads; |
1072 | ||
42249160 | 1073 | evlist->core.has_user_cpus = !!target->cpu_list; |
ec9a77a7 | 1074 | |
453fa030 | 1075 | perf_evlist__set_maps(&evlist->core, cpus, threads); |
d5bc056e | 1076 | |
bfd1b83d NK |
1077 | /* as evlist now has references, put count here */ |
1078 | perf_cpu_map__put(cpus); | |
1079 | perf_thread_map__put(threads); | |
1080 | ||
d5bc056e | 1081 | return 0; |
7e2ed097 ACM |
1082 | |
1083 | out_delete_threads: | |
7836e52e | 1084 | perf_thread_map__put(threads); |
7e2ed097 ACM |
1085 | return -1; |
1086 | } | |
1087 | ||
24bf91a7 | 1088 | int evlist__apply_filters(struct evlist *evlist, struct evsel **err_evsel) |
0a102479 | 1089 | { |
32dcd021 | 1090 | struct evsel *evsel; |
745cefc5 | 1091 | int err = 0; |
0a102479 | 1092 | |
e5cadb93 | 1093 | evlist__for_each_entry(evlist, evsel) { |
d988d5ee KL |
1094 | /* |
1095 | * filters only work for tracepoint event, which doesn't have cpu limit. | |
1096 | * So evlist and evsel should always be same. | |
1097 | */ | |
d180aa56 NK |
1098 | if (evsel->filter) { |
1099 | err = perf_evsel__apply_filter(&evsel->core, evsel->filter); | |
1100 | if (err) { | |
1101 | *err_evsel = evsel; | |
1102 | break; | |
1103 | } | |
1104 | } | |
1105 | ||
1106 | /* | |
1107 | * non-tracepoint events can have BPF filters. | |
1108 | */ | |
1109 | if (!list_empty(&evsel->bpf_filters)) { | |
1110 | err = perf_bpf_filter__prepare(evsel); | |
1111 | if (err) { | |
1112 | *err_evsel = evsel; | |
1113 | break; | |
1114 | } | |
23d4aad4 | 1115 | } |
0a102479 FW |
1116 | } |
1117 | ||
745cefc5 ACM |
1118 | return err; |
1119 | } | |
1120 | ||
24bf91a7 | 1121 | int evlist__set_tp_filter(struct evlist *evlist, const char *filter) |
745cefc5 | 1122 | { |
32dcd021 | 1123 | struct evsel *evsel; |
745cefc5 | 1124 | int err = 0; |
745cefc5 | 1125 | |
05cea449 ACM |
1126 | if (filter == NULL) |
1127 | return -1; | |
1128 | ||
e5cadb93 | 1129 | evlist__for_each_entry(evlist, evsel) { |
1fc632ce | 1130 | if (evsel->core.attr.type != PERF_TYPE_TRACEPOINT) |
fdf14720 WN |
1131 | continue; |
1132 | ||
ad681adf | 1133 | err = evsel__set_filter(evsel, filter); |
745cefc5 ACM |
1134 | if (err) |
1135 | break; | |
1136 | } | |
1137 | ||
1138 | return err; | |
0a102479 | 1139 | } |
74429964 | 1140 | |
24bf91a7 | 1141 | int evlist__append_tp_filter(struct evlist *evlist, const char *filter) |
53c92f73 ACM |
1142 | { |
1143 | struct evsel *evsel; | |
1144 | int err = 0; | |
1145 | ||
1146 | if (filter == NULL) | |
1147 | return -1; | |
1148 | ||
1149 | evlist__for_each_entry(evlist, evsel) { | |
1150 | if (evsel->core.attr.type != PERF_TYPE_TRACEPOINT) | |
1151 | continue; | |
1152 | ||
ad681adf | 1153 | err = evsel__append_tp_filter(evsel, filter); |
53c92f73 ACM |
1154 | if (err) |
1155 | break; | |
1156 | } | |
1157 | ||
1158 | return err; | |
1159 | } | |
1160 | ||
da949f50 | 1161 | char *asprintf__tp_filter_pids(size_t npids, pid_t *pids) |
cfd70a26 ACM |
1162 | { |
1163 | char *filter; | |
be199ada | 1164 | size_t i; |
cfd70a26 | 1165 | |
be199ada ACM |
1166 | for (i = 0; i < npids; ++i) { |
1167 | if (i == 0) { | |
1168 | if (asprintf(&filter, "common_pid != %d", pids[i]) < 0) | |
05cea449 | 1169 | return NULL; |
be199ada ACM |
1170 | } else { |
1171 | char *tmp; | |
1172 | ||
1173 | if (asprintf(&tmp, "%s && common_pid != %d", filter, pids[i]) < 0) | |
1174 | goto out_free; | |
1175 | ||
1176 | free(filter); | |
1177 | filter = tmp; | |
1178 | } | |
1179 | } | |
cfd70a26 | 1180 | |
05cea449 | 1181 | return filter; |
be199ada | 1182 | out_free: |
05cea449 ACM |
1183 | free(filter); |
1184 | return NULL; | |
1185 | } | |
1186 | ||
24bf91a7 | 1187 | int evlist__set_tp_filter_pids(struct evlist *evlist, size_t npids, pid_t *pids) |
05cea449 ACM |
1188 | { |
1189 | char *filter = asprintf__tp_filter_pids(npids, pids); | |
24bf91a7 | 1190 | int ret = evlist__set_tp_filter(evlist, filter); |
05cea449 | 1191 | |
cfd70a26 ACM |
1192 | free(filter); |
1193 | return ret; | |
1194 | } | |
1195 | ||
24bf91a7 | 1196 | int evlist__set_tp_filter_pid(struct evlist *evlist, pid_t pid) |
be199ada | 1197 | { |
24bf91a7 | 1198 | return evlist__set_tp_filter_pids(evlist, 1, &pid); |
be199ada ACM |
1199 | } |
1200 | ||
24bf91a7 | 1201 | int evlist__append_tp_filter_pids(struct evlist *evlist, size_t npids, pid_t *pids) |
1827ab5b ACM |
1202 | { |
1203 | char *filter = asprintf__tp_filter_pids(npids, pids); | |
24bf91a7 | 1204 | int ret = evlist__append_tp_filter(evlist, filter); |
1827ab5b ACM |
1205 | |
1206 | free(filter); | |
1207 | return ret; | |
1208 | } | |
1209 | ||
24bf91a7 | 1210 | int evlist__append_tp_filter_pid(struct evlist *evlist, pid_t pid) |
1827ab5b | 1211 | { |
24bf91a7 | 1212 | return evlist__append_tp_filter_pids(evlist, 1, &pid); |
1827ab5b ACM |
1213 | } |
1214 | ||
b3c2cc2b | 1215 | bool evlist__valid_sample_type(struct evlist *evlist) |
74429964 | 1216 | { |
32dcd021 | 1217 | struct evsel *pos; |
c2a70653 | 1218 | |
6484d2f9 | 1219 | if (evlist->core.nr_entries == 1) |
75562573 AH |
1220 | return true; |
1221 | ||
1222 | if (evlist->id_pos < 0 || evlist->is_pos < 0) | |
1223 | return false; | |
1224 | ||
e5cadb93 | 1225 | evlist__for_each_entry(evlist, pos) { |
75562573 AH |
1226 | if (pos->id_pos != evlist->id_pos || |
1227 | pos->is_pos != evlist->is_pos) | |
c2a70653 | 1228 | return false; |
74429964 FW |
1229 | } |
1230 | ||
c2a70653 | 1231 | return true; |
74429964 FW |
1232 | } |
1233 | ||
b3c2cc2b | 1234 | u64 __evlist__combined_sample_type(struct evlist *evlist) |
c2a70653 | 1235 | { |
32dcd021 | 1236 | struct evsel *evsel; |
75562573 AH |
1237 | |
1238 | if (evlist->combined_sample_type) | |
1239 | return evlist->combined_sample_type; | |
1240 | ||
e5cadb93 | 1241 | evlist__for_each_entry(evlist, evsel) |
1fc632ce | 1242 | evlist->combined_sample_type |= evsel->core.attr.sample_type; |
75562573 AH |
1243 | |
1244 | return evlist->combined_sample_type; | |
1245 | } | |
1246 | ||
b3c2cc2b | 1247 | u64 evlist__combined_sample_type(struct evlist *evlist) |
75562573 AH |
1248 | { |
1249 | evlist->combined_sample_type = 0; | |
b3c2cc2b | 1250 | return __evlist__combined_sample_type(evlist); |
c2a70653 ACM |
1251 | } |
1252 | ||
92c7d7cd | 1253 | u64 evlist__combined_branch_type(struct evlist *evlist) |
98df858e | 1254 | { |
32dcd021 | 1255 | struct evsel *evsel; |
98df858e AK |
1256 | u64 branch_type = 0; |
1257 | ||
e5cadb93 | 1258 | evlist__for_each_entry(evlist, evsel) |
1fc632ce | 1259 | branch_type |= evsel->core.attr.branch_sample_type; |
98df858e AK |
1260 | return branch_type; |
1261 | } | |
1262 | ||
78e1bc25 | 1263 | bool evlist__valid_read_format(struct evlist *evlist) |
9ede473c | 1264 | { |
515dbe48 | 1265 | struct evsel *first = evlist__first(evlist), *pos = first; |
1fc632ce JO |
1266 | u64 read_format = first->core.attr.read_format; |
1267 | u64 sample_type = first->core.attr.sample_type; | |
9ede473c | 1268 | |
e5cadb93 | 1269 | evlist__for_each_entry(evlist, pos) { |
94d3820f AH |
1270 | if (read_format != pos->core.attr.read_format) { |
1271 | pr_debug("Read format differs %#" PRIx64 " vs %#" PRIx64 "\n", | |
1272 | read_format, (u64)pos->core.attr.read_format); | |
1273 | } | |
9ede473c JO |
1274 | } |
1275 | ||
4d39c89f | 1276 | /* PERF_SAMPLE_READ implies PERF_FORMAT_ID. */ |
9ede473c JO |
1277 | if ((sample_type & PERF_SAMPLE_READ) && |
1278 | !(read_format & PERF_FORMAT_ID)) { | |
1279 | return false; | |
1280 | } | |
1281 | ||
1282 | return true; | |
1283 | } | |
1284 | ||
1420ba2f | 1285 | u16 evlist__id_hdr_size(struct evlist *evlist) |
81e36bff | 1286 | { |
515dbe48 | 1287 | struct evsel *first = evlist__first(evlist); |
81e36bff | 1288 | |
0a64de04 | 1289 | return first->core.attr.sample_id_all ? evsel__id_hdr_size(first) : 0; |
81e36bff ACM |
1290 | } |
1291 | ||
8cedf3a5 | 1292 | bool evlist__valid_sample_id_all(struct evlist *evlist) |
74429964 | 1293 | { |
515dbe48 | 1294 | struct evsel *first = evlist__first(evlist), *pos = first; |
c2a70653 | 1295 | |
e5cadb93 | 1296 | evlist__for_each_entry_continue(evlist, pos) { |
1fc632ce | 1297 | if (first->core.attr.sample_id_all != pos->core.attr.sample_id_all) |
c2a70653 | 1298 | return false; |
74429964 FW |
1299 | } |
1300 | ||
c2a70653 ACM |
1301 | return true; |
1302 | } | |
1303 | ||
8cedf3a5 | 1304 | bool evlist__sample_id_all(struct evlist *evlist) |
c2a70653 | 1305 | { |
515dbe48 | 1306 | struct evsel *first = evlist__first(evlist); |
1fc632ce | 1307 | return first->core.attr.sample_id_all; |
74429964 | 1308 | } |
81cce8de | 1309 | |
900c8ead | 1310 | void evlist__set_selected(struct evlist *evlist, struct evsel *evsel) |
81cce8de ACM |
1311 | { |
1312 | evlist->selected = evsel; | |
1313 | } | |
727ab04e | 1314 | |
750b4ede | 1315 | void evlist__close(struct evlist *evlist) |
a74b4b66 | 1316 | { |
32dcd021 | 1317 | struct evsel *evsel; |
472832d2 | 1318 | struct evlist_cpu_iterator evlist_cpu_itr; |
7736627b | 1319 | struct affinity affinity; |
a74b4b66 | 1320 | |
7736627b | 1321 | /* |
0df6ade7 | 1322 | * With perf record core.user_requested_cpus is usually NULL. |
7736627b AK |
1323 | * Use the old method to handle this for now. |
1324 | */ | |
0df6ade7 IR |
1325 | if (!evlist->core.user_requested_cpus || |
1326 | cpu_map__is_dummy(evlist->core.user_requested_cpus)) { | |
7736627b AK |
1327 | evlist__for_each_entry_reverse(evlist, evsel) |
1328 | evsel__close(evsel); | |
1329 | return; | |
1330 | } | |
1331 | ||
1332 | if (affinity__setup(&affinity) < 0) | |
1333 | return; | |
7736627b | 1334 | |
472832d2 IR |
1335 | evlist__for_each_cpu(evlist_cpu_itr, evlist, &affinity) { |
1336 | perf_evsel__close_cpu(&evlist_cpu_itr.evsel->core, | |
1337 | evlist_cpu_itr.cpu_map_idx); | |
7736627b | 1338 | } |
472832d2 | 1339 | |
7736627b AK |
1340 | affinity__cleanup(&affinity); |
1341 | evlist__for_each_entry_reverse(evlist, evsel) { | |
1342 | perf_evsel__free_fd(&evsel->core); | |
1343 | perf_evsel__free_id(&evsel->core); | |
1344 | } | |
513068f2 | 1345 | perf_evlist__reset_id_hash(&evlist->core); |
a74b4b66 NK |
1346 | } |
1347 | ||
7748bb71 | 1348 | static int evlist__create_syswide_maps(struct evlist *evlist) |
4112eb18 | 1349 | { |
f854839b | 1350 | struct perf_cpu_map *cpus; |
9749b90e | 1351 | struct perf_thread_map *threads; |
4112eb18 ACM |
1352 | |
1353 | /* | |
1354 | * Try reading /sys/devices/system/cpu/online to get | |
1355 | * an all cpus map. | |
1356 | * | |
1357 | * FIXME: -ENOMEM is the best we can do here, the cpu_map | |
1358 | * code needs an overhaul to properly forward the | |
1359 | * error, and we may not want to do that fallback to a | |
1360 | * default cpu identity map :-\ | |
1361 | */ | |
effe957c | 1362 | cpus = perf_cpu_map__new_online_cpus(); |
8c0498b6 | 1363 | if (!cpus) |
4112eb18 ACM |
1364 | goto out; |
1365 | ||
4b49cce2 | 1366 | threads = perf_thread_map__new_dummy(); |
8c0498b6 AH |
1367 | if (!threads) |
1368 | goto out_put; | |
4112eb18 | 1369 | |
453fa030 | 1370 | perf_evlist__set_maps(&evlist->core, cpus, threads); |
bfd1b83d NK |
1371 | |
1372 | perf_thread_map__put(threads); | |
8c0498b6 | 1373 | out_put: |
38f01d8d | 1374 | perf_cpu_map__put(cpus); |
bfd1b83d | 1375 | out: |
f717d89a | 1376 | return -ENOMEM; |
4112eb18 ACM |
1377 | } |
1378 | ||
474ddc4c | 1379 | int evlist__open(struct evlist *evlist) |
727ab04e | 1380 | { |
32dcd021 | 1381 | struct evsel *evsel; |
a74b4b66 | 1382 | int err; |
727ab04e | 1383 | |
4112eb18 ACM |
1384 | /* |
1385 | * Default: one fd per CPU, all threads, aka systemwide | |
1386 | * as sys_perf_event_open(cpu = -1, thread = -1) is EINVAL | |
1387 | */ | |
0df6ade7 | 1388 | if (evlist->core.threads == NULL && evlist->core.user_requested_cpus == NULL) { |
7748bb71 | 1389 | err = evlist__create_syswide_maps(evlist); |
4112eb18 ACM |
1390 | if (err < 0) |
1391 | goto out_err; | |
1392 | } | |
1393 | ||
0a7e7ec9 | 1394 | evlist__update_id_pos(evlist); |
733cd2fe | 1395 | |
e5cadb93 | 1396 | evlist__for_each_entry(evlist, evsel) { |
af663bd0 | 1397 | err = evsel__open(evsel, evsel->core.cpus, evsel->core.threads); |
727ab04e ACM |
1398 | if (err < 0) |
1399 | goto out_err; | |
1400 | } | |
1401 | ||
1402 | return 0; | |
1403 | out_err: | |
750b4ede | 1404 | evlist__close(evlist); |
41c21a68 | 1405 | errno = -err; |
727ab04e ACM |
1406 | return err; |
1407 | } | |
35b9d88e | 1408 | |
7b392ef0 ACM |
1409 | int evlist__prepare_workload(struct evlist *evlist, struct target *target, const char *argv[], |
1410 | bool pipe_output, void (*exec_error)(int signo, siginfo_t *info, void *ucontext)) | |
35b9d88e ACM |
1411 | { |
1412 | int child_ready_pipe[2], go_pipe[2]; | |
1413 | char bf; | |
1414 | ||
1415 | if (pipe(child_ready_pipe) < 0) { | |
1416 | perror("failed to create 'ready' pipe"); | |
1417 | return -1; | |
1418 | } | |
1419 | ||
1420 | if (pipe(go_pipe) < 0) { | |
1421 | perror("failed to create 'go' pipe"); | |
1422 | goto out_close_ready_pipe; | |
1423 | } | |
1424 | ||
1425 | evlist->workload.pid = fork(); | |
1426 | if (evlist->workload.pid < 0) { | |
1427 | perror("failed to fork"); | |
1428 | goto out_close_pipes; | |
1429 | } | |
1430 | ||
1431 | if (!evlist->workload.pid) { | |
5f1c4225 ACM |
1432 | int ret; |
1433 | ||
119fa3c9 | 1434 | if (pipe_output) |
35b9d88e ACM |
1435 | dup2(2, 1); |
1436 | ||
0817df08 DA |
1437 | signal(SIGTERM, SIG_DFL); |
1438 | ||
35b9d88e ACM |
1439 | close(child_ready_pipe[0]); |
1440 | close(go_pipe[1]); | |
1441 | fcntl(go_pipe[0], F_SETFD, FD_CLOEXEC); | |
1442 | ||
a7672d1d ACM |
1443 | /* |
1444 | * Change the name of this process not to confuse --exclude-perf users | |
1445 | * that sees 'perf' in the window up to the execvp() and thinks that | |
1446 | * perf samples are not being excluded. | |
1447 | */ | |
1448 | prctl(PR_SET_NAME, "perf-exec"); | |
1449 | ||
35b9d88e ACM |
1450 | /* |
1451 | * Tell the parent we're ready to go | |
1452 | */ | |
1453 | close(child_ready_pipe[1]); | |
1454 | ||
1455 | /* | |
1456 | * Wait until the parent tells us to go. | |
1457 | */ | |
5f1c4225 ACM |
1458 | ret = read(go_pipe[0], &bf, 1); |
1459 | /* | |
1460 | * The parent will ask for the execvp() to be performed by | |
1461 | * writing exactly one byte, in workload.cork_fd, usually via | |
7b392ef0 | 1462 | * evlist__start_workload(). |
5f1c4225 | 1463 | * |
20f86fc1 | 1464 | * For cancelling the workload without actually running it, |
5f1c4225 ACM |
1465 | * the parent will just close workload.cork_fd, without writing |
1466 | * anything, i.e. read will return zero and we just exit() | |
1467 | * here. | |
1468 | */ | |
1469 | if (ret != 1) { | |
1470 | if (ret == -1) | |
1471 | perror("unable to read pipe"); | |
1472 | exit(ret); | |
1473 | } | |
35b9d88e ACM |
1474 | |
1475 | execvp(argv[0], (char **)argv); | |
1476 | ||
735f7e0b | 1477 | if (exec_error) { |
f33cbe72 ACM |
1478 | union sigval val; |
1479 | ||
1480 | val.sival_int = errno; | |
1481 | if (sigqueue(getppid(), SIGUSR1, val)) | |
1482 | perror(argv[0]); | |
1483 | } else | |
1484 | perror(argv[0]); | |
35b9d88e ACM |
1485 | exit(-1); |
1486 | } | |
1487 | ||
735f7e0b ACM |
1488 | if (exec_error) { |
1489 | struct sigaction act = { | |
1490 | .sa_flags = SA_SIGINFO, | |
1491 | .sa_sigaction = exec_error, | |
1492 | }; | |
1493 | sigaction(SIGUSR1, &act, NULL); | |
1494 | } | |
1495 | ||
1aaf63b1 | 1496 | if (target__none(target)) { |
03617c22 | 1497 | if (evlist->core.threads == NULL) { |
1aaf63b1 ACM |
1498 | fprintf(stderr, "FATAL: evlist->threads need to be set at this point (%s:%d).\n", |
1499 | __func__, __LINE__); | |
1500 | goto out_close_pipes; | |
1501 | } | |
03617c22 | 1502 | perf_thread_map__set_pid(evlist->core.threads, 0, evlist->workload.pid); |
1aaf63b1 | 1503 | } |
35b9d88e ACM |
1504 | |
1505 | close(child_ready_pipe[1]); | |
1506 | close(go_pipe[0]); | |
1507 | /* | |
1508 | * wait for child to settle | |
1509 | */ | |
1510 | if (read(child_ready_pipe[0], &bf, 1) == -1) { | |
1511 | perror("unable to read pipe"); | |
1512 | goto out_close_pipes; | |
1513 | } | |
1514 | ||
bcf3145f | 1515 | fcntl(go_pipe[1], F_SETFD, FD_CLOEXEC); |
35b9d88e ACM |
1516 | evlist->workload.cork_fd = go_pipe[1]; |
1517 | close(child_ready_pipe[0]); | |
1518 | return 0; | |
1519 | ||
1520 | out_close_pipes: | |
1521 | close(go_pipe[0]); | |
1522 | close(go_pipe[1]); | |
1523 | out_close_ready_pipe: | |
1524 | close(child_ready_pipe[0]); | |
1525 | close(child_ready_pipe[1]); | |
1526 | return -1; | |
1527 | } | |
1528 | ||
7b392ef0 | 1529 | int evlist__start_workload(struct evlist *evlist) |
35b9d88e ACM |
1530 | { |
1531 | if (evlist->workload.cork_fd > 0) { | |
b3824404 | 1532 | char bf = 0; |
bcf3145f | 1533 | int ret; |
35b9d88e ACM |
1534 | /* |
1535 | * Remove the cork, let it rip! | |
1536 | */ | |
bcf3145f NK |
1537 | ret = write(evlist->workload.cork_fd, &bf, 1); |
1538 | if (ret < 0) | |
e978be9e | 1539 | perror("unable to write to pipe"); |
bcf3145f NK |
1540 | |
1541 | close(evlist->workload.cork_fd); | |
1542 | return ret; | |
35b9d88e ACM |
1543 | } |
1544 | ||
1545 | return 0; | |
1546 | } | |
cb0b29e0 | 1547 | |
2a6599cd | 1548 | int evlist__parse_sample(struct evlist *evlist, union perf_event *event, struct perf_sample *sample) |
cb0b29e0 | 1549 | { |
3ccf8a7b | 1550 | struct evsel *evsel = evlist__event2evsel(evlist, event); |
3461b65d | 1551 | int ret; |
75562573 AH |
1552 | |
1553 | if (!evsel) | |
1554 | return -EFAULT; | |
3461b65d AH |
1555 | ret = evsel__parse_sample(evsel, event, sample); |
1556 | if (ret) | |
1557 | return ret; | |
1558 | if (perf_guest && sample->id) { | |
1559 | struct perf_sample_id *sid = evlist__id2sid(evlist, sample->id); | |
1560 | ||
1561 | if (sid) { | |
1562 | sample->machine_pid = sid->machine_pid; | |
1563 | sample->vcpu = sid->vcpu.cpu; | |
1564 | } | |
1565 | } | |
1566 | return 0; | |
cb0b29e0 | 1567 | } |
78f067b3 | 1568 | |
2a6599cd | 1569 | int evlist__parse_sample_timestamp(struct evlist *evlist, union perf_event *event, u64 *timestamp) |
01468120 | 1570 | { |
3ccf8a7b | 1571 | struct evsel *evsel = evlist__event2evsel(evlist, event); |
01468120 JO |
1572 | |
1573 | if (!evsel) | |
1574 | return -EFAULT; | |
6b6017a2 | 1575 | return evsel__parse_sample_timestamp(evsel, event, timestamp); |
01468120 JO |
1576 | } |
1577 | ||
d1f249ec | 1578 | int evlist__strerror_open(struct evlist *evlist, int err, char *buf, size_t size) |
a8f23d8f ACM |
1579 | { |
1580 | int printed, value; | |
c8b5f2c9 | 1581 | char sbuf[STRERR_BUFSIZE], *emsg = str_error_r(err, sbuf, sizeof(sbuf)); |
a8f23d8f ACM |
1582 | |
1583 | switch (err) { | |
1584 | case EACCES: | |
1585 | case EPERM: | |
1586 | printed = scnprintf(buf, size, | |
1587 | "Error:\t%s.\n" | |
1588 | "Hint:\tCheck /proc/sys/kernel/perf_event_paranoid setting.", emsg); | |
1589 | ||
1a47245d | 1590 | value = perf_event_paranoid(); |
a8f23d8f ACM |
1591 | |
1592 | printed += scnprintf(buf + printed, size - printed, "\nHint:\t"); | |
1593 | ||
1594 | if (value >= 2) { | |
1595 | printed += scnprintf(buf + printed, size - printed, | |
1596 | "For your workloads it needs to be <= 1\nHint:\t"); | |
1597 | } | |
1598 | printed += scnprintf(buf + printed, size - printed, | |
5229e366 | 1599 | "For system wide tracing it needs to be set to -1.\n"); |
a8f23d8f ACM |
1600 | |
1601 | printed += scnprintf(buf + printed, size - printed, | |
5229e366 ACM |
1602 | "Hint:\tTry: 'sudo sh -c \"echo -1 > /proc/sys/kernel/perf_event_paranoid\"'\n" |
1603 | "Hint:\tThe current value is %d.", value); | |
a8f23d8f | 1604 | break; |
d9aade7f | 1605 | case EINVAL: { |
515dbe48 | 1606 | struct evsel *first = evlist__first(evlist); |
d9aade7f ACM |
1607 | int max_freq; |
1608 | ||
1609 | if (sysctl__read_int("kernel/perf_event_max_sample_rate", &max_freq) < 0) | |
1610 | goto out_default; | |
1611 | ||
1fc632ce | 1612 | if (first->core.attr.sample_freq < (u64)max_freq) |
d9aade7f ACM |
1613 | goto out_default; |
1614 | ||
1615 | printed = scnprintf(buf, size, | |
1616 | "Error:\t%s.\n" | |
1617 | "Hint:\tCheck /proc/sys/kernel/perf_event_max_sample_rate.\n" | |
1618 | "Hint:\tThe current value is %d and %" PRIu64 " is being requested.", | |
1fc632ce | 1619 | emsg, max_freq, first->core.attr.sample_freq); |
d9aade7f ACM |
1620 | break; |
1621 | } | |
a8f23d8f | 1622 | default: |
d9aade7f | 1623 | out_default: |
a8f23d8f ACM |
1624 | scnprintf(buf, size, "%s", emsg); |
1625 | break; | |
1626 | } | |
1627 | ||
1628 | return 0; | |
1629 | } | |
a025e4f0 | 1630 | |
d1f249ec | 1631 | int evlist__strerror_mmap(struct evlist *evlist, int err, char *buf, size_t size) |
956fa571 | 1632 | { |
c8b5f2c9 | 1633 | char sbuf[STRERR_BUFSIZE], *emsg = str_error_r(err, sbuf, sizeof(sbuf)); |
f6fa4375 | 1634 | int pages_attempted = evlist->core.mmap_len / 1024, pages_max_per_user, printed = 0; |
956fa571 ACM |
1635 | |
1636 | switch (err) { | |
1637 | case EPERM: | |
e5d4a290 | 1638 | sysctl__read_int("kernel/perf_event_mlock_kb", &pages_max_per_user); |
e965bea1 ACM |
1639 | printed += scnprintf(buf + printed, size - printed, |
1640 | "Error:\t%s.\n" | |
956fa571 | 1641 | "Hint:\tCheck /proc/sys/kernel/perf_event_mlock_kb (%d kB) setting.\n" |
e965bea1 | 1642 | "Hint:\tTried using %zd kB.\n", |
e5d4a290 | 1643 | emsg, pages_max_per_user, pages_attempted); |
e965bea1 ACM |
1644 | |
1645 | if (pages_attempted >= pages_max_per_user) { | |
1646 | printed += scnprintf(buf + printed, size - printed, | |
1647 | "Hint:\tTry 'sudo sh -c \"echo %d > /proc/sys/kernel/perf_event_mlock_kb\"', or\n", | |
1648 | pages_max_per_user + pages_attempted); | |
1649 | } | |
1650 | ||
1651 | printed += scnprintf(buf + printed, size - printed, | |
1652 | "Hint:\tTry using a smaller -m/--mmap-pages value."); | |
956fa571 ACM |
1653 | break; |
1654 | default: | |
1655 | scnprintf(buf, size, "%s", emsg); | |
1656 | break; | |
1657 | } | |
1658 | ||
1659 | return 0; | |
1660 | } | |
1661 | ||
e414fd1a | 1662 | void evlist__to_front(struct evlist *evlist, struct evsel *move_evsel) |
a025e4f0 | 1663 | { |
32dcd021 | 1664 | struct evsel *evsel, *n; |
a025e4f0 AH |
1665 | LIST_HEAD(move); |
1666 | ||
515dbe48 | 1667 | if (move_evsel == evlist__first(evlist)) |
a025e4f0 AH |
1668 | return; |
1669 | ||
e5cadb93 | 1670 | evlist__for_each_entry_safe(evlist, n, evsel) { |
fba7c866 | 1671 | if (evsel__leader(evsel) == evsel__leader(move_evsel)) |
b27c4ece | 1672 | list_move_tail(&evsel->core.node, &move); |
a025e4f0 AH |
1673 | } |
1674 | ||
ce9036a6 | 1675 | list_splice(&move, &evlist->core.entries); |
a025e4f0 | 1676 | } |
60b0896c | 1677 | |
e80db255 | 1678 | struct evsel *evlist__get_tracking_event(struct evlist *evlist) |
442ad225 AH |
1679 | { |
1680 | struct evsel *evsel; | |
1681 | ||
1682 | evlist__for_each_entry(evlist, evsel) { | |
1683 | if (evsel->tracking) | |
1684 | return evsel; | |
1685 | } | |
1686 | ||
1687 | return evlist__first(evlist); | |
1688 | } | |
1689 | ||
e80db255 | 1690 | void evlist__set_tracking_event(struct evlist *evlist, struct evsel *tracking_evsel) |
60b0896c | 1691 | { |
32dcd021 | 1692 | struct evsel *evsel; |
60b0896c AH |
1693 | |
1694 | if (tracking_evsel->tracking) | |
1695 | return; | |
1696 | ||
e5cadb93 | 1697 | evlist__for_each_entry(evlist, evsel) { |
60b0896c AH |
1698 | if (evsel != tracking_evsel) |
1699 | evsel->tracking = false; | |
1700 | } | |
1701 | ||
1702 | tracking_evsel->tracking = true; | |
1703 | } | |
7630b3e2 | 1704 | |
9c95e4ef YJ |
1705 | struct evsel *evlist__findnew_tracking_event(struct evlist *evlist, bool system_wide) |
1706 | { | |
1707 | struct evsel *evsel; | |
1708 | ||
1709 | evsel = evlist__get_tracking_event(evlist); | |
1710 | if (!evsel__is_dummy_event(evsel)) { | |
1711 | evsel = evlist__add_aux_dummy(evlist, system_wide); | |
1712 | if (!evsel) | |
1713 | return NULL; | |
1714 | ||
1715 | evlist__set_tracking_event(evlist, evsel); | |
1716 | } else if (system_wide) { | |
1717 | perf_evlist__go_system_wide(&evlist->core, &evsel->core); | |
1718 | } | |
1719 | ||
1720 | return evsel; | |
1721 | } | |
1722 | ||
b02736f7 | 1723 | struct evsel *evlist__find_evsel_by_str(struct evlist *evlist, const char *str) |
7630b3e2 | 1724 | { |
32dcd021 | 1725 | struct evsel *evsel; |
7630b3e2 | 1726 | |
e5cadb93 | 1727 | evlist__for_each_entry(evlist, evsel) { |
7630b3e2 WN |
1728 | if (!evsel->name) |
1729 | continue; | |
ce1d3bc2 | 1730 | if (evsel__name_is(evsel, str)) |
7630b3e2 WN |
1731 | return evsel; |
1732 | } | |
1733 | ||
1734 | return NULL; | |
1735 | } | |
54cc54de | 1736 | |
ade9d208 | 1737 | void evlist__toggle_bkw_mmap(struct evlist *evlist, enum bkw_mmap_state state) |
54cc54de WN |
1738 | { |
1739 | enum bkw_mmap_state old_state = evlist->bkw_mmap_state; | |
1740 | enum action { | |
1741 | NONE, | |
1742 | PAUSE, | |
1743 | RESUME, | |
1744 | } action = NONE; | |
1745 | ||
0b72d69a | 1746 | if (!evlist->overwrite_mmap) |
54cc54de WN |
1747 | return; |
1748 | ||
1749 | switch (old_state) { | |
1750 | case BKW_MMAP_NOTREADY: { | |
1751 | if (state != BKW_MMAP_RUNNING) | |
dd8bd53a | 1752 | goto state_err; |
54cc54de WN |
1753 | break; |
1754 | } | |
1755 | case BKW_MMAP_RUNNING: { | |
1756 | if (state != BKW_MMAP_DATA_PENDING) | |
1757 | goto state_err; | |
1758 | action = PAUSE; | |
1759 | break; | |
1760 | } | |
1761 | case BKW_MMAP_DATA_PENDING: { | |
1762 | if (state != BKW_MMAP_EMPTY) | |
1763 | goto state_err; | |
1764 | break; | |
1765 | } | |
1766 | case BKW_MMAP_EMPTY: { | |
1767 | if (state != BKW_MMAP_RUNNING) | |
1768 | goto state_err; | |
1769 | action = RESUME; | |
1770 | break; | |
1771 | } | |
1772 | default: | |
1773 | WARN_ONCE(1, "Shouldn't get there\n"); | |
1774 | } | |
1775 | ||
1776 | evlist->bkw_mmap_state = state; | |
1777 | ||
1778 | switch (action) { | |
1779 | case PAUSE: | |
0a60b339 | 1780 | evlist__pause(evlist); |
54cc54de WN |
1781 | break; |
1782 | case RESUME: | |
0a60b339 | 1783 | evlist__resume(evlist); |
54cc54de WN |
1784 | break; |
1785 | case NONE: | |
1786 | default: | |
1787 | break; | |
1788 | } | |
1789 | ||
1790 | state_err: | |
1791 | return; | |
1792 | } | |
07d6f446 | 1793 | |
78e1bc25 | 1794 | bool evlist__exclude_kernel(struct evlist *evlist) |
07d6f446 | 1795 | { |
32dcd021 | 1796 | struct evsel *evsel; |
07d6f446 ACM |
1797 | |
1798 | evlist__for_each_entry(evlist, evsel) { | |
1fc632ce | 1799 | if (!evsel->core.attr.exclude_kernel) |
07d6f446 ACM |
1800 | return false; |
1801 | } | |
1802 | ||
1803 | return true; | |
1804 | } | |
e2bdbe80 JY |
1805 | |
1806 | /* | |
1807 | * Events in data file are not collect in groups, but we still want | |
1808 | * the group display. Set the artificial group and set the leader's | |
1809 | * forced_leader flag to notify the display code. | |
1810 | */ | |
64b4778b | 1811 | void evlist__force_leader(struct evlist *evlist) |
e2bdbe80 | 1812 | { |
9d2dc632 | 1813 | if (evlist__nr_groups(evlist) == 0) { |
515dbe48 | 1814 | struct evsel *leader = evlist__first(evlist); |
e2bdbe80 | 1815 | |
a622eafa | 1816 | evlist__set_leader(evlist); |
e2bdbe80 JY |
1817 | leader->forced_leader = true; |
1818 | } | |
1819 | } | |
c3537fc2 | 1820 | |
64b4778b | 1821 | struct evsel *evlist__reset_weak_group(struct evlist *evsel_list, struct evsel *evsel, bool close) |
c3537fc2 | 1822 | { |
32dcd021 | 1823 | struct evsel *c2, *leader; |
c3537fc2 AK |
1824 | bool is_open = true; |
1825 | ||
fba7c866 JO |
1826 | leader = evsel__leader(evsel); |
1827 | ||
c3537fc2 | 1828 | pr_debug("Weak group for %s/%d failed\n", |
5643b1a5 | 1829 | leader->name, leader->core.nr_members); |
c3537fc2 AK |
1830 | |
1831 | /* | |
1832 | * for_each_group_member doesn't work here because it doesn't | |
1833 | * include the first entry. | |
1834 | */ | |
1835 | evlist__for_each_entry(evsel_list, c2) { | |
1836 | if (c2 == evsel) | |
1837 | is_open = false; | |
fba7c866 | 1838 | if (evsel__has_leader(c2, leader)) { |
4804e011 | 1839 | if (is_open && close) |
5a40e199 | 1840 | perf_evsel__close(&c2->core); |
d98079c0 IR |
1841 | /* |
1842 | * We want to close all members of the group and reopen | |
1843 | * them. Some events, like Intel topdown, require being | |
1844 | * in a group and so keep these in the group. | |
1845 | */ | |
e8f4f794 | 1846 | evsel__remove_from_group(c2, leader); |
d98079c0 | 1847 | |
4804e011 AK |
1848 | /* |
1849 | * Set this for all former members of the group | |
1850 | * to indicate they get reopened. | |
1851 | */ | |
1852 | c2->reset_group = true; | |
c3537fc2 AK |
1853 | } |
1854 | } | |
d98079c0 IR |
1855 | /* Reset the leader count if all entries were removed. */ |
1856 | if (leader->core.nr_members == 1) | |
1857 | leader->core.nr_members = 0; | |
c3537fc2 AK |
1858 | return leader; |
1859 | } | |
ec886bf5 | 1860 | |
a8fcbd26 AH |
1861 | static int evlist__parse_control_fifo(const char *str, int *ctl_fd, int *ctl_fd_ack, bool *ctl_fd_close) |
1862 | { | |
1863 | char *s, *p; | |
1864 | int ret = 0, fd; | |
1865 | ||
1866 | if (strncmp(str, "fifo:", 5)) | |
1867 | return -EINVAL; | |
1868 | ||
1869 | str += 5; | |
1870 | if (!*str || *str == ',') | |
1871 | return -EINVAL; | |
1872 | ||
1873 | s = strdup(str); | |
1874 | if (!s) | |
1875 | return -ENOMEM; | |
1876 | ||
1877 | p = strchr(s, ','); | |
1878 | if (p) | |
1879 | *p = '\0'; | |
1880 | ||
1881 | /* | |
1882 | * O_RDWR avoids POLLHUPs which is necessary to allow the other | |
1883 | * end of a FIFO to be repeatedly opened and closed. | |
1884 | */ | |
1885 | fd = open(s, O_RDWR | O_NONBLOCK | O_CLOEXEC); | |
1886 | if (fd < 0) { | |
1887 | pr_err("Failed to open '%s'\n", s); | |
1888 | ret = -errno; | |
1889 | goto out_free; | |
1890 | } | |
1891 | *ctl_fd = fd; | |
1892 | *ctl_fd_close = true; | |
1893 | ||
1894 | if (p && *++p) { | |
1895 | /* O_RDWR | O_NONBLOCK means the other end need not be open */ | |
1896 | fd = open(p, O_RDWR | O_NONBLOCK | O_CLOEXEC); | |
1897 | if (fd < 0) { | |
1898 | pr_err("Failed to open '%s'\n", p); | |
1899 | ret = -errno; | |
1900 | goto out_free; | |
1901 | } | |
1902 | *ctl_fd_ack = fd; | |
1903 | } | |
1904 | ||
1905 | out_free: | |
1906 | free(s); | |
1907 | return ret; | |
1908 | } | |
1909 | ||
1910 | int evlist__parse_control(const char *str, int *ctl_fd, int *ctl_fd_ack, bool *ctl_fd_close) | |
9864a66d AH |
1911 | { |
1912 | char *comma = NULL, *endptr = NULL; | |
1913 | ||
a8fcbd26 AH |
1914 | *ctl_fd_close = false; |
1915 | ||
9864a66d | 1916 | if (strncmp(str, "fd:", 3)) |
a8fcbd26 | 1917 | return evlist__parse_control_fifo(str, ctl_fd, ctl_fd_ack, ctl_fd_close); |
9864a66d AH |
1918 | |
1919 | *ctl_fd = strtoul(&str[3], &endptr, 0); | |
1920 | if (endptr == &str[3]) | |
1921 | return -EINVAL; | |
1922 | ||
1923 | comma = strchr(str, ','); | |
1924 | if (comma) { | |
1925 | if (endptr != comma) | |
1926 | return -EINVAL; | |
1927 | ||
1928 | *ctl_fd_ack = strtoul(comma + 1, &endptr, 0); | |
1929 | if (endptr == comma + 1 || *endptr != '\0') | |
1930 | return -EINVAL; | |
1931 | } | |
1932 | ||
1933 | return 0; | |
1934 | } | |
1935 | ||
ee7fe31e AH |
1936 | void evlist__close_control(int ctl_fd, int ctl_fd_ack, bool *ctl_fd_close) |
1937 | { | |
1938 | if (*ctl_fd_close) { | |
1939 | *ctl_fd_close = false; | |
1940 | close(ctl_fd); | |
1941 | if (ctl_fd_ack >= 0) | |
1942 | close(ctl_fd_ack); | |
1943 | } | |
1944 | } | |
1945 | ||
ec886bf5 AB |
1946 | int evlist__initialize_ctlfd(struct evlist *evlist, int fd, int ack) |
1947 | { | |
1948 | if (fd == -1) { | |
1949 | pr_debug("Control descriptor is not initialized\n"); | |
1950 | return 0; | |
1951 | } | |
1952 | ||
1953 | evlist->ctl_fd.pos = perf_evlist__add_pollfd(&evlist->core, fd, NULL, POLLIN, | |
feff0b61 AH |
1954 | fdarray_flag__nonfilterable | |
1955 | fdarray_flag__non_perf_event); | |
ec886bf5 AB |
1956 | if (evlist->ctl_fd.pos < 0) { |
1957 | evlist->ctl_fd.pos = -1; | |
1958 | pr_err("Failed to add ctl fd entry: %m\n"); | |
1959 | return -1; | |
1960 | } | |
1961 | ||
1962 | evlist->ctl_fd.fd = fd; | |
1963 | evlist->ctl_fd.ack = ack; | |
1964 | ||
1965 | return 0; | |
1966 | } | |
1967 | ||
1968 | bool evlist__ctlfd_initialized(struct evlist *evlist) | |
1969 | { | |
1970 | return evlist->ctl_fd.pos >= 0; | |
1971 | } | |
1972 | ||
1973 | int evlist__finalize_ctlfd(struct evlist *evlist) | |
1974 | { | |
1975 | struct pollfd *entries = evlist->core.pollfd.entries; | |
1976 | ||
1977 | if (!evlist__ctlfd_initialized(evlist)) | |
1978 | return 0; | |
1979 | ||
1980 | entries[evlist->ctl_fd.pos].fd = -1; | |
1981 | entries[evlist->ctl_fd.pos].events = 0; | |
1982 | entries[evlist->ctl_fd.pos].revents = 0; | |
1983 | ||
1984 | evlist->ctl_fd.pos = -1; | |
1985 | evlist->ctl_fd.ack = -1; | |
1986 | evlist->ctl_fd.fd = -1; | |
1987 | ||
1988 | return 0; | |
1989 | } | |
1990 | ||
1991 | static int evlist__ctlfd_recv(struct evlist *evlist, enum evlist_ctl_cmd *cmd, | |
1992 | char *cmd_data, size_t data_size) | |
1993 | { | |
1994 | int err; | |
1995 | char c; | |
1996 | size_t bytes_read = 0; | |
1997 | ||
40db8ff5 | 1998 | *cmd = EVLIST_CTL_CMD_UNSUPPORTED; |
ec886bf5 AB |
1999 | memset(cmd_data, 0, data_size); |
2000 | data_size--; | |
2001 | ||
2002 | do { | |
2003 | err = read(evlist->ctl_fd.fd, &c, 1); | |
2004 | if (err > 0) { | |
2005 | if (c == '\n' || c == '\0') | |
2006 | break; | |
2007 | cmd_data[bytes_read++] = c; | |
2008 | if (bytes_read == data_size) | |
2009 | break; | |
40db8ff5 AH |
2010 | continue; |
2011 | } else if (err == -1) { | |
2012 | if (errno == EINTR) | |
2013 | continue; | |
2014 | if (errno == EAGAIN || errno == EWOULDBLOCK) | |
2015 | err = 0; | |
2016 | else | |
ec886bf5 | 2017 | pr_err("Failed to read from ctlfd %d: %m\n", evlist->ctl_fd.fd); |
ec886bf5 | 2018 | } |
40db8ff5 | 2019 | break; |
ec886bf5 AB |
2020 | } while (1); |
2021 | ||
2022 | pr_debug("Message from ctl_fd: \"%s%s\"\n", cmd_data, | |
2023 | bytes_read == data_size ? "" : c == '\n' ? "\\n" : "\\0"); | |
2024 | ||
40db8ff5 | 2025 | if (bytes_read > 0) { |
ec886bf5 AB |
2026 | if (!strncmp(cmd_data, EVLIST_CTL_CMD_ENABLE_TAG, |
2027 | (sizeof(EVLIST_CTL_CMD_ENABLE_TAG)-1))) { | |
2028 | *cmd = EVLIST_CTL_CMD_ENABLE; | |
2029 | } else if (!strncmp(cmd_data, EVLIST_CTL_CMD_DISABLE_TAG, | |
2030 | (sizeof(EVLIST_CTL_CMD_DISABLE_TAG)-1))) { | |
2031 | *cmd = EVLIST_CTL_CMD_DISABLE; | |
d20aff15 AH |
2032 | } else if (!strncmp(cmd_data, EVLIST_CTL_CMD_SNAPSHOT_TAG, |
2033 | (sizeof(EVLIST_CTL_CMD_SNAPSHOT_TAG)-1))) { | |
2034 | *cmd = EVLIST_CTL_CMD_SNAPSHOT; | |
2035 | pr_debug("is snapshot\n"); | |
142544a9 JO |
2036 | } else if (!strncmp(cmd_data, EVLIST_CTL_CMD_EVLIST_TAG, |
2037 | (sizeof(EVLIST_CTL_CMD_EVLIST_TAG)-1))) { | |
2038 | *cmd = EVLIST_CTL_CMD_EVLIST; | |
f186cd61 JO |
2039 | } else if (!strncmp(cmd_data, EVLIST_CTL_CMD_STOP_TAG, |
2040 | (sizeof(EVLIST_CTL_CMD_STOP_TAG)-1))) { | |
2041 | *cmd = EVLIST_CTL_CMD_STOP; | |
47fddcb4 JO |
2042 | } else if (!strncmp(cmd_data, EVLIST_CTL_CMD_PING_TAG, |
2043 | (sizeof(EVLIST_CTL_CMD_PING_TAG)-1))) { | |
2044 | *cmd = EVLIST_CTL_CMD_PING; | |
ec886bf5 AB |
2045 | } |
2046 | } | |
2047 | ||
40db8ff5 | 2048 | return bytes_read ? (int)bytes_read : err; |
ec886bf5 AB |
2049 | } |
2050 | ||
d20aff15 | 2051 | int evlist__ctlfd_ack(struct evlist *evlist) |
ec886bf5 AB |
2052 | { |
2053 | int err; | |
2054 | ||
2055 | if (evlist->ctl_fd.ack == -1) | |
2056 | return 0; | |
2057 | ||
2058 | err = write(evlist->ctl_fd.ack, EVLIST_CTL_CMD_ACK_TAG, | |
2059 | sizeof(EVLIST_CTL_CMD_ACK_TAG)); | |
2060 | if (err == -1) | |
2061 | pr_err("failed to write to ctl_ack_fd %d: %m\n", evlist->ctl_fd.ack); | |
2062 | ||
2063 | return err; | |
2064 | } | |
2065 | ||
991ae4eb JO |
2066 | static int get_cmd_arg(char *cmd_data, size_t cmd_size, char **arg) |
2067 | { | |
2068 | char *data = cmd_data + cmd_size; | |
2069 | ||
2070 | /* no argument */ | |
2071 | if (!*data) | |
2072 | return 0; | |
2073 | ||
2074 | /* there's argument */ | |
2075 | if (*data == ' ') { | |
2076 | *arg = data + 1; | |
2077 | return 1; | |
2078 | } | |
2079 | ||
2080 | /* malformed */ | |
2081 | return -1; | |
2082 | } | |
2083 | ||
2084 | static int evlist__ctlfd_enable(struct evlist *evlist, char *cmd_data, bool enable) | |
2085 | { | |
2086 | struct evsel *evsel; | |
2087 | char *name; | |
2088 | int err; | |
2089 | ||
2090 | err = get_cmd_arg(cmd_data, | |
2091 | enable ? sizeof(EVLIST_CTL_CMD_ENABLE_TAG) - 1 : | |
2092 | sizeof(EVLIST_CTL_CMD_DISABLE_TAG) - 1, | |
2093 | &name); | |
2094 | if (err < 0) { | |
2095 | pr_info("failed: wrong command\n"); | |
2096 | return -1; | |
2097 | } | |
2098 | ||
2099 | if (err) { | |
2100 | evsel = evlist__find_evsel_by_str(evlist, name); | |
2101 | if (evsel) { | |
2102 | if (enable) | |
2103 | evlist__enable_evsel(evlist, name); | |
2104 | else | |
2105 | evlist__disable_evsel(evlist, name); | |
2106 | pr_info("Event %s %s\n", evsel->name, | |
2107 | enable ? "enabled" : "disabled"); | |
2108 | } else { | |
2109 | pr_info("failed: can't find '%s' event\n", name); | |
2110 | } | |
2111 | } else { | |
2112 | if (enable) { | |
2113 | evlist__enable(evlist); | |
2114 | pr_info(EVLIST_ENABLED_MSG); | |
2115 | } else { | |
2116 | evlist__disable(evlist); | |
2117 | pr_info(EVLIST_DISABLED_MSG); | |
2118 | } | |
2119 | } | |
2120 | ||
2121 | return 0; | |
2122 | } | |
2123 | ||
142544a9 JO |
2124 | static int evlist__ctlfd_list(struct evlist *evlist, char *cmd_data) |
2125 | { | |
2126 | struct perf_attr_details details = { .verbose = false, }; | |
2127 | struct evsel *evsel; | |
2128 | char *arg; | |
2129 | int err; | |
2130 | ||
2131 | err = get_cmd_arg(cmd_data, | |
2132 | sizeof(EVLIST_CTL_CMD_EVLIST_TAG) - 1, | |
2133 | &arg); | |
2134 | if (err < 0) { | |
2135 | pr_info("failed: wrong command\n"); | |
2136 | return -1; | |
2137 | } | |
2138 | ||
2139 | if (err) { | |
2140 | if (!strcmp(arg, "-v")) { | |
2141 | details.verbose = true; | |
2142 | } else if (!strcmp(arg, "-g")) { | |
2143 | details.event_group = true; | |
2144 | } else if (!strcmp(arg, "-F")) { | |
2145 | details.freq = true; | |
2146 | } else { | |
2147 | pr_info("failed: wrong command\n"); | |
2148 | return -1; | |
2149 | } | |
2150 | } | |
2151 | ||
2152 | evlist__for_each_entry(evlist, evsel) | |
2153 | evsel__fprintf(evsel, &details, stderr); | |
2154 | ||
2155 | return 0; | |
2156 | } | |
2157 | ||
ec886bf5 AB |
2158 | int evlist__ctlfd_process(struct evlist *evlist, enum evlist_ctl_cmd *cmd) |
2159 | { | |
2160 | int err = 0; | |
2161 | char cmd_data[EVLIST_CTL_CMD_MAX_LEN]; | |
2162 | int ctlfd_pos = evlist->ctl_fd.pos; | |
2163 | struct pollfd *entries = evlist->core.pollfd.entries; | |
2164 | ||
2165 | if (!evlist__ctlfd_initialized(evlist) || !entries[ctlfd_pos].revents) | |
2166 | return 0; | |
2167 | ||
2168 | if (entries[ctlfd_pos].revents & POLLIN) { | |
2169 | err = evlist__ctlfd_recv(evlist, cmd, cmd_data, | |
2170 | EVLIST_CTL_CMD_MAX_LEN); | |
2171 | if (err > 0) { | |
2172 | switch (*cmd) { | |
2173 | case EVLIST_CTL_CMD_ENABLE: | |
ec886bf5 | 2174 | case EVLIST_CTL_CMD_DISABLE: |
991ae4eb JO |
2175 | err = evlist__ctlfd_enable(evlist, cmd_data, |
2176 | *cmd == EVLIST_CTL_CMD_ENABLE); | |
ec886bf5 | 2177 | break; |
142544a9 JO |
2178 | case EVLIST_CTL_CMD_EVLIST: |
2179 | err = evlist__ctlfd_list(evlist, cmd_data); | |
2180 | break; | |
d20aff15 | 2181 | case EVLIST_CTL_CMD_SNAPSHOT: |
f186cd61 | 2182 | case EVLIST_CTL_CMD_STOP: |
47fddcb4 | 2183 | case EVLIST_CTL_CMD_PING: |
d20aff15 | 2184 | break; |
ec886bf5 AB |
2185 | case EVLIST_CTL_CMD_ACK: |
2186 | case EVLIST_CTL_CMD_UNSUPPORTED: | |
2187 | default: | |
2188 | pr_debug("ctlfd: unsupported %d\n", *cmd); | |
2189 | break; | |
2190 | } | |
d20aff15 AH |
2191 | if (!(*cmd == EVLIST_CTL_CMD_ACK || *cmd == EVLIST_CTL_CMD_UNSUPPORTED || |
2192 | *cmd == EVLIST_CTL_CMD_SNAPSHOT)) | |
ec886bf5 AB |
2193 | evlist__ctlfd_ack(evlist); |
2194 | } | |
2195 | } | |
2196 | ||
2197 | if (entries[ctlfd_pos].revents & (POLLHUP | POLLERR)) | |
2198 | evlist__finalize_ctlfd(evlist); | |
2199 | else | |
2200 | entries[ctlfd_pos].revents = 0; | |
2201 | ||
2202 | return err; | |
2203 | } | |
b214ba8c | 2204 | |
6657a099 AH |
2205 | /** |
2206 | * struct event_enable_time - perf record -D/--delay single time range. | |
2207 | * @start: start of time range to enable events in milliseconds | |
2208 | * @end: end of time range to enable events in milliseconds | |
2209 | * | |
2210 | * N.B. this structure is also accessed as an array of int. | |
2211 | */ | |
2212 | struct event_enable_time { | |
2213 | int start; | |
2214 | int end; | |
2215 | }; | |
2216 | ||
2217 | static int parse_event_enable_time(const char *str, struct event_enable_time *range, bool first) | |
2218 | { | |
2219 | const char *fmt = first ? "%u - %u %n" : " , %u - %u %n"; | |
2220 | int ret, start, end, n; | |
2221 | ||
2222 | ret = sscanf(str, fmt, &start, &end, &n); | |
2223 | if (ret != 2 || end <= start) | |
2224 | return -EINVAL; | |
2225 | if (range) { | |
2226 | range->start = start; | |
2227 | range->end = end; | |
2228 | } | |
2229 | return n; | |
2230 | } | |
2231 | ||
2232 | static ssize_t parse_event_enable_times(const char *str, struct event_enable_time *range) | |
2233 | { | |
2234 | int incr = !!range; | |
2235 | bool first = true; | |
2236 | ssize_t ret, cnt; | |
2237 | ||
2238 | for (cnt = 0; *str; cnt++) { | |
2239 | ret = parse_event_enable_time(str, range, first); | |
2240 | if (ret < 0) | |
2241 | return ret; | |
2242 | /* Check no overlap */ | |
2243 | if (!first && range && range->start <= range[-1].end) | |
2244 | return -EINVAL; | |
2245 | str += ret; | |
2246 | range += incr; | |
2247 | first = false; | |
2248 | } | |
2249 | return cnt; | |
2250 | } | |
2251 | ||
2252 | /** | |
2253 | * struct event_enable_timer - control structure for perf record -D/--delay. | |
2254 | * @evlist: event list | |
2255 | * @times: time ranges that events are enabled (N.B. this is also accessed as an | |
2256 | * array of int) | |
2257 | * @times_cnt: number of time ranges | |
2258 | * @timerfd: timer file descriptor | |
2259 | * @pollfd_pos: position in @evlist array of file descriptors to poll (fdarray) | |
2260 | * @times_step: current position in (int *)@times)[], | |
2261 | * refer event_enable_timer__process() | |
2262 | * | |
2263 | * Note, this structure is only used when there are time ranges, not when there | |
2264 | * is only an initial delay. | |
2265 | */ | |
2266 | struct event_enable_timer { | |
2267 | struct evlist *evlist; | |
2268 | struct event_enable_time *times; | |
2269 | size_t times_cnt; | |
2270 | int timerfd; | |
2271 | int pollfd_pos; | |
2272 | size_t times_step; | |
2273 | }; | |
2274 | ||
2275 | static int str_to_delay(const char *str) | |
2276 | { | |
2277 | char *endptr; | |
2278 | long d; | |
2279 | ||
2280 | d = strtol(str, &endptr, 10); | |
2281 | if (*endptr || d > INT_MAX || d < -1) | |
2282 | return 0; | |
2283 | return d; | |
2284 | } | |
2285 | ||
2286 | int evlist__parse_event_enable_time(struct evlist *evlist, struct record_opts *opts, | |
2287 | const char *str, int unset) | |
2288 | { | |
2289 | enum fdarray_flags flags = fdarray_flag__nonfilterable | fdarray_flag__non_perf_event; | |
2290 | struct event_enable_timer *eet; | |
2291 | ssize_t times_cnt; | |
2292 | ssize_t ret; | |
2293 | int err; | |
2294 | ||
2295 | if (unset) | |
2296 | return 0; | |
2297 | ||
cb4b9e68 CD |
2298 | opts->target.initial_delay = str_to_delay(str); |
2299 | if (opts->target.initial_delay) | |
6657a099 AH |
2300 | return 0; |
2301 | ||
2302 | ret = parse_event_enable_times(str, NULL); | |
2303 | if (ret < 0) | |
2304 | return ret; | |
2305 | ||
2306 | times_cnt = ret; | |
2307 | if (times_cnt == 0) | |
2308 | return -EINVAL; | |
2309 | ||
2310 | eet = zalloc(sizeof(*eet)); | |
2311 | if (!eet) | |
2312 | return -ENOMEM; | |
2313 | ||
2314 | eet->times = calloc(times_cnt, sizeof(*eet->times)); | |
2315 | if (!eet->times) { | |
2316 | err = -ENOMEM; | |
2317 | goto free_eet; | |
2318 | } | |
2319 | ||
2320 | if (parse_event_enable_times(str, eet->times) != times_cnt) { | |
2321 | err = -EINVAL; | |
2322 | goto free_eet_times; | |
2323 | } | |
2324 | ||
2325 | eet->times_cnt = times_cnt; | |
2326 | ||
2327 | eet->timerfd = timerfd_create(CLOCK_MONOTONIC, TFD_CLOEXEC); | |
2328 | if (eet->timerfd == -1) { | |
2329 | err = -errno; | |
2330 | pr_err("timerfd_create failed: %s\n", strerror(errno)); | |
2331 | goto free_eet_times; | |
2332 | } | |
2333 | ||
2334 | eet->pollfd_pos = perf_evlist__add_pollfd(&evlist->core, eet->timerfd, NULL, POLLIN, flags); | |
2335 | if (eet->pollfd_pos < 0) { | |
2336 | err = eet->pollfd_pos; | |
2337 | goto close_timerfd; | |
2338 | } | |
2339 | ||
2340 | eet->evlist = evlist; | |
2341 | evlist->eet = eet; | |
cb4b9e68 | 2342 | opts->target.initial_delay = eet->times[0].start; |
6657a099 AH |
2343 | |
2344 | return 0; | |
2345 | ||
2346 | close_timerfd: | |
2347 | close(eet->timerfd); | |
2348 | free_eet_times: | |
2bfc8134 | 2349 | zfree(&eet->times); |
6657a099 AH |
2350 | free_eet: |
2351 | free(eet); | |
2352 | return err; | |
2353 | } | |
2354 | ||
2355 | static int event_enable_timer__set_timer(struct event_enable_timer *eet, int ms) | |
2356 | { | |
2357 | struct itimerspec its = { | |
2358 | .it_value.tv_sec = ms / MSEC_PER_SEC, | |
2359 | .it_value.tv_nsec = (ms % MSEC_PER_SEC) * NSEC_PER_MSEC, | |
2360 | }; | |
2361 | int err = 0; | |
2362 | ||
2363 | if (timerfd_settime(eet->timerfd, 0, &its, NULL) < 0) { | |
2364 | err = -errno; | |
2365 | pr_err("timerfd_settime failed: %s\n", strerror(errno)); | |
2366 | } | |
2367 | return err; | |
2368 | } | |
2369 | ||
2370 | int event_enable_timer__start(struct event_enable_timer *eet) | |
2371 | { | |
2372 | int ms; | |
2373 | ||
2374 | if (!eet) | |
2375 | return 0; | |
2376 | ||
2377 | ms = eet->times[0].end - eet->times[0].start; | |
2378 | eet->times_step = 1; | |
2379 | ||
2380 | return event_enable_timer__set_timer(eet, ms); | |
2381 | } | |
2382 | ||
2383 | int event_enable_timer__process(struct event_enable_timer *eet) | |
2384 | { | |
2385 | struct pollfd *entries; | |
2386 | short revents; | |
2387 | ||
2388 | if (!eet) | |
2389 | return 0; | |
2390 | ||
2391 | entries = eet->evlist->core.pollfd.entries; | |
2392 | revents = entries[eet->pollfd_pos].revents; | |
2393 | entries[eet->pollfd_pos].revents = 0; | |
2394 | ||
2395 | if (revents & POLLIN) { | |
2396 | size_t step = eet->times_step; | |
2397 | size_t pos = step / 2; | |
2398 | ||
2399 | if (step & 1) { | |
2400 | evlist__disable_non_dummy(eet->evlist); | |
2401 | pr_info(EVLIST_DISABLED_MSG); | |
2402 | if (pos >= eet->times_cnt - 1) { | |
2403 | /* Disarm timer */ | |
2404 | event_enable_timer__set_timer(eet, 0); | |
2405 | return 1; /* Stop */ | |
2406 | } | |
2407 | } else { | |
2408 | evlist__enable_non_dummy(eet->evlist); | |
2409 | pr_info(EVLIST_ENABLED_MSG); | |
2410 | } | |
2411 | ||
2412 | step += 1; | |
2413 | pos = step / 2; | |
2414 | ||
2415 | if (pos < eet->times_cnt) { | |
2416 | int *times = (int *)eet->times; /* Accessing 'times' as array of int */ | |
2417 | int ms = times[step] - times[step - 1]; | |
2418 | ||
2419 | eet->times_step = step; | |
2420 | return event_enable_timer__set_timer(eet, ms); | |
2421 | } | |
2422 | } | |
2423 | ||
2424 | return 0; | |
2425 | } | |
2426 | ||
2427 | void event_enable_timer__exit(struct event_enable_timer **ep) | |
2428 | { | |
2429 | if (!ep || !*ep) | |
2430 | return; | |
2bfc8134 | 2431 | zfree(&(*ep)->times); |
6657a099 AH |
2432 | zfree(ep); |
2433 | } | |
2434 | ||
b214ba8c NK |
2435 | struct evsel *evlist__find_evsel(struct evlist *evlist, int idx) |
2436 | { | |
2437 | struct evsel *evsel; | |
2438 | ||
2439 | evlist__for_each_entry(evlist, evsel) { | |
38fe0e01 | 2440 | if (evsel->core.idx == idx) |
b214ba8c NK |
2441 | return evsel; |
2442 | } | |
2443 | return NULL; | |
2444 | } | |
9865ea8a ACM |
2445 | |
2446 | int evlist__scnprintf_evsels(struct evlist *evlist, size_t size, char *bf) | |
2447 | { | |
2448 | struct evsel *evsel; | |
2449 | int printed = 0; | |
2450 | ||
2451 | evlist__for_each_entry(evlist, evsel) { | |
2452 | if (evsel__is_dummy_event(evsel)) | |
2453 | continue; | |
2454 | if (size > (strlen(evsel__name(evsel)) + (printed ? 2 : 1))) { | |
2455 | printed += scnprintf(bf + printed, size - printed, "%s%s", printed ? "," : "", evsel__name(evsel)); | |
2456 | } else { | |
2457 | printed += scnprintf(bf + printed, size - printed, "%s...", printed ? "," : ""); | |
2458 | break; | |
2459 | } | |
2460 | } | |
2461 | ||
2462 | return printed; | |
2463 | } | |
d5a8bd0f JY |
2464 | |
2465 | void evlist__check_mem_load_aux(struct evlist *evlist) | |
2466 | { | |
2467 | struct evsel *leader, *evsel, *pos; | |
2468 | ||
2469 | /* | |
2470 | * For some platforms, the 'mem-loads' event is required to use | |
2471 | * together with 'mem-loads-aux' within a group and 'mem-loads-aux' | |
2472 | * must be the group leader. Now we disable this group before reporting | |
2473 | * because 'mem-loads-aux' is just an auxiliary event. It doesn't carry | |
2474 | * any valid memory load information. | |
2475 | */ | |
2476 | evlist__for_each_entry(evlist, evsel) { | |
fba7c866 | 2477 | leader = evsel__leader(evsel); |
d5a8bd0f JY |
2478 | if (leader == evsel) |
2479 | continue; | |
2480 | ||
2481 | if (leader->name && strstr(leader->name, "mem-loads-aux")) { | |
2482 | for_each_group_evsel(pos, leader) { | |
fba7c866 | 2483 | evsel__set_leader(pos, pos); |
d5a8bd0f JY |
2484 | pos->core.nr_members = 0; |
2485 | } | |
2486 | } | |
2487 | } | |
2488 | } | |
5ac72634 IR |
2489 | |
2490 | /** | |
2491 | * evlist__warn_user_requested_cpus() - Check each evsel against requested CPUs | |
2492 | * and warn if the user CPU list is inapplicable for the event's PMU's | |
2493 | * CPUs. Not core PMUs list a CPU in sysfs, but this may be overwritten by a | |
2494 | * user requested CPU and so any online CPU is applicable. Core PMUs handle | |
2495 | * events on the CPUs in their list and otherwise the event isn't supported. | |
2496 | * @evlist: The list of events being checked. | |
2497 | * @cpu_list: The user provided list of CPUs. | |
2498 | */ | |
2499 | void evlist__warn_user_requested_cpus(struct evlist *evlist, const char *cpu_list) | |
2500 | { | |
2501 | struct perf_cpu_map *user_requested_cpus; | |
2502 | struct evsel *pos; | |
2503 | ||
2504 | if (!cpu_list) | |
2505 | return; | |
2506 | ||
2507 | user_requested_cpus = perf_cpu_map__new(cpu_list); | |
2508 | if (!user_requested_cpus) | |
2509 | return; | |
2510 | ||
2511 | evlist__for_each_entry(evlist, pos) { | |
2512 | struct perf_cpu_map *intersect, *to_test; | |
2513 | const struct perf_pmu *pmu = evsel__find_pmu(pos); | |
2514 | ||
2515 | to_test = pmu && pmu->is_core ? pmu->cpus : cpu_map__online(); | |
2516 | intersect = perf_cpu_map__intersect(to_test, user_requested_cpus); | |
2517 | if (!perf_cpu_map__equal(intersect, user_requested_cpus)) { | |
2518 | char buf[128]; | |
2519 | ||
2520 | cpu_map__snprint(to_test, buf, sizeof(buf)); | |
2521 | pr_warning("WARNING: A requested CPU in '%s' is not supported by PMU '%s' (CPUs %s) for event '%s'\n", | |
2522 | cpu_list, pmu ? pmu->name : "cpu", buf, evsel__name(pos)); | |
2523 | } | |
2524 | perf_cpu_map__put(intersect); | |
2525 | } | |
2526 | perf_cpu_map__put(user_requested_cpus); | |
2527 | } | |
a61f89bf KL |
2528 | |
2529 | void evlist__uniquify_name(struct evlist *evlist) | |
2530 | { | |
0b4b785d | 2531 | char *new_name, empty_attributes[2] = ":", *attributes; |
a61f89bf | 2532 | struct evsel *pos; |
a61f89bf KL |
2533 | |
2534 | if (perf_pmus__num_core_pmus() == 1) | |
2535 | return; | |
2536 | ||
2537 | evlist__for_each_entry(evlist, pos) { | |
2538 | if (!evsel__is_hybrid(pos)) | |
2539 | continue; | |
2540 | ||
2541 | if (strchr(pos->name, '/')) | |
2542 | continue; | |
2543 | ||
0b4b785d ACM |
2544 | attributes = strchr(pos->name, ':'); |
2545 | if (attributes) | |
2546 | *attributes = '\0'; | |
2547 | else | |
2548 | attributes = empty_attributes; | |
2549 | ||
2550 | if (asprintf(&new_name, "%s/%s/%s", pos->pmu_name, pos->name, attributes + 1)) { | |
a61f89bf KL |
2551 | free(pos->name); |
2552 | pos->name = new_name; | |
0b4b785d ACM |
2553 | } else { |
2554 | *attributes = ':'; | |
a61f89bf KL |
2555 | } |
2556 | } | |
2557 | } |