Commit | Line | Data |
---|---|---|
f8a95309 ACM |
1 | /* |
2 | * Copyright (C) 2011, Red Hat Inc, Arnaldo Carvalho de Melo <acme@redhat.com> | |
3 | * | |
4 | * Parts came from builtin-{top,stat,record}.c, see those files for further | |
5 | * copyright notes. | |
6 | * | |
7 | * Released under the GPL v2. (and only v2, not any later version) | |
8 | */ | |
9 | ||
69aad6f1 | 10 | #include "evsel.h" |
70082dd9 | 11 | #include "evlist.h" |
69aad6f1 | 12 | #include "util.h" |
86bd5e86 | 13 | #include "cpumap.h" |
fd78260b | 14 | #include "thread_map.h" |
69aad6f1 | 15 | |
c52b12ed ACM |
16 | #define FD(e, x, y) (*(int *)xyarray__entry(e->fd, x, y)) |
17 | ||
c2a70653 ACM |
18 | int __perf_evsel__sample_size(u64 sample_type) |
19 | { | |
20 | u64 mask = sample_type & PERF_SAMPLE_MASK; | |
21 | int size = 0; | |
22 | int i; | |
23 | ||
24 | for (i = 0; i < 64; i++) { | |
25 | if (mask & (1ULL << i)) | |
26 | size++; | |
27 | } | |
28 | ||
29 | size *= sizeof(u64); | |
30 | ||
31 | return size; | |
32 | } | |
33 | ||
ef1d1af2 ACM |
34 | void perf_evsel__init(struct perf_evsel *evsel, |
35 | struct perf_event_attr *attr, int idx) | |
36 | { | |
37 | evsel->idx = idx; | |
38 | evsel->attr = *attr; | |
39 | INIT_LIST_HEAD(&evsel->node); | |
40 | } | |
41 | ||
23a2f3ab | 42 | struct perf_evsel *perf_evsel__new(struct perf_event_attr *attr, int idx) |
69aad6f1 ACM |
43 | { |
44 | struct perf_evsel *evsel = zalloc(sizeof(*evsel)); | |
45 | ||
ef1d1af2 ACM |
46 | if (evsel != NULL) |
47 | perf_evsel__init(evsel, attr, idx); | |
69aad6f1 ACM |
48 | |
49 | return evsel; | |
50 | } | |
51 | ||
52 | int perf_evsel__alloc_fd(struct perf_evsel *evsel, int ncpus, int nthreads) | |
53 | { | |
4af4c955 | 54 | int cpu, thread; |
69aad6f1 | 55 | evsel->fd = xyarray__new(ncpus, nthreads, sizeof(int)); |
4af4c955 DA |
56 | |
57 | if (evsel->fd) { | |
58 | for (cpu = 0; cpu < ncpus; cpu++) { | |
59 | for (thread = 0; thread < nthreads; thread++) { | |
60 | FD(evsel, cpu, thread) = -1; | |
61 | } | |
62 | } | |
63 | } | |
64 | ||
69aad6f1 ACM |
65 | return evsel->fd != NULL ? 0 : -ENOMEM; |
66 | } | |
67 | ||
70db7533 ACM |
68 | int perf_evsel__alloc_id(struct perf_evsel *evsel, int ncpus, int nthreads) |
69 | { | |
a91e5431 ACM |
70 | evsel->sample_id = xyarray__new(ncpus, nthreads, sizeof(struct perf_sample_id)); |
71 | if (evsel->sample_id == NULL) | |
72 | return -ENOMEM; | |
73 | ||
74 | evsel->id = zalloc(ncpus * nthreads * sizeof(u64)); | |
75 | if (evsel->id == NULL) { | |
76 | xyarray__delete(evsel->sample_id); | |
77 | evsel->sample_id = NULL; | |
78 | return -ENOMEM; | |
79 | } | |
80 | ||
81 | return 0; | |
70db7533 ACM |
82 | } |
83 | ||
c52b12ed ACM |
84 | int perf_evsel__alloc_counts(struct perf_evsel *evsel, int ncpus) |
85 | { | |
86 | evsel->counts = zalloc((sizeof(*evsel->counts) + | |
87 | (ncpus * sizeof(struct perf_counts_values)))); | |
88 | return evsel->counts != NULL ? 0 : -ENOMEM; | |
89 | } | |
90 | ||
69aad6f1 ACM |
91 | void perf_evsel__free_fd(struct perf_evsel *evsel) |
92 | { | |
93 | xyarray__delete(evsel->fd); | |
94 | evsel->fd = NULL; | |
95 | } | |
96 | ||
70db7533 ACM |
97 | void perf_evsel__free_id(struct perf_evsel *evsel) |
98 | { | |
a91e5431 ACM |
99 | xyarray__delete(evsel->sample_id); |
100 | evsel->sample_id = NULL; | |
101 | free(evsel->id); | |
70db7533 ACM |
102 | evsel->id = NULL; |
103 | } | |
104 | ||
c52b12ed ACM |
105 | void perf_evsel__close_fd(struct perf_evsel *evsel, int ncpus, int nthreads) |
106 | { | |
107 | int cpu, thread; | |
108 | ||
109 | for (cpu = 0; cpu < ncpus; cpu++) | |
110 | for (thread = 0; thread < nthreads; ++thread) { | |
111 | close(FD(evsel, cpu, thread)); | |
112 | FD(evsel, cpu, thread) = -1; | |
113 | } | |
114 | } | |
115 | ||
ef1d1af2 | 116 | void perf_evsel__exit(struct perf_evsel *evsel) |
69aad6f1 ACM |
117 | { |
118 | assert(list_empty(&evsel->node)); | |
119 | xyarray__delete(evsel->fd); | |
a91e5431 ACM |
120 | xyarray__delete(evsel->sample_id); |
121 | free(evsel->id); | |
ef1d1af2 ACM |
122 | } |
123 | ||
124 | void perf_evsel__delete(struct perf_evsel *evsel) | |
125 | { | |
126 | perf_evsel__exit(evsel); | |
023695d9 | 127 | close_cgroup(evsel->cgrp); |
f0c55bcf | 128 | free(evsel->name); |
69aad6f1 ACM |
129 | free(evsel); |
130 | } | |
c52b12ed ACM |
131 | |
132 | int __perf_evsel__read_on_cpu(struct perf_evsel *evsel, | |
133 | int cpu, int thread, bool scale) | |
134 | { | |
135 | struct perf_counts_values count; | |
136 | size_t nv = scale ? 3 : 1; | |
137 | ||
138 | if (FD(evsel, cpu, thread) < 0) | |
139 | return -EINVAL; | |
140 | ||
4eed11d5 ACM |
141 | if (evsel->counts == NULL && perf_evsel__alloc_counts(evsel, cpu + 1) < 0) |
142 | return -ENOMEM; | |
143 | ||
c52b12ed ACM |
144 | if (readn(FD(evsel, cpu, thread), &count, nv * sizeof(u64)) < 0) |
145 | return -errno; | |
146 | ||
147 | if (scale) { | |
148 | if (count.run == 0) | |
149 | count.val = 0; | |
150 | else if (count.run < count.ena) | |
151 | count.val = (u64)((double)count.val * count.ena / count.run + 0.5); | |
152 | } else | |
153 | count.ena = count.run = 0; | |
154 | ||
155 | evsel->counts->cpu[cpu] = count; | |
156 | return 0; | |
157 | } | |
158 | ||
159 | int __perf_evsel__read(struct perf_evsel *evsel, | |
160 | int ncpus, int nthreads, bool scale) | |
161 | { | |
162 | size_t nv = scale ? 3 : 1; | |
163 | int cpu, thread; | |
164 | struct perf_counts_values *aggr = &evsel->counts->aggr, count; | |
165 | ||
52bcd994 | 166 | aggr->val = aggr->ena = aggr->run = 0; |
c52b12ed ACM |
167 | |
168 | for (cpu = 0; cpu < ncpus; cpu++) { | |
169 | for (thread = 0; thread < nthreads; thread++) { | |
170 | if (FD(evsel, cpu, thread) < 0) | |
171 | continue; | |
172 | ||
173 | if (readn(FD(evsel, cpu, thread), | |
174 | &count, nv * sizeof(u64)) < 0) | |
175 | return -errno; | |
176 | ||
177 | aggr->val += count.val; | |
178 | if (scale) { | |
179 | aggr->ena += count.ena; | |
180 | aggr->run += count.run; | |
181 | } | |
182 | } | |
183 | } | |
184 | ||
185 | evsel->counts->scaled = 0; | |
186 | if (scale) { | |
187 | if (aggr->run == 0) { | |
188 | evsel->counts->scaled = -1; | |
189 | aggr->val = 0; | |
190 | return 0; | |
191 | } | |
192 | ||
193 | if (aggr->run < aggr->ena) { | |
194 | evsel->counts->scaled = 1; | |
195 | aggr->val = (u64)((double)aggr->val * aggr->ena / aggr->run + 0.5); | |
196 | } | |
197 | } else | |
198 | aggr->ena = aggr->run = 0; | |
199 | ||
200 | return 0; | |
201 | } | |
48290609 | 202 | |
0252208e | 203 | static int __perf_evsel__open(struct perf_evsel *evsel, struct cpu_map *cpus, |
5d2cd909 | 204 | struct thread_map *threads, bool group) |
48290609 | 205 | { |
0252208e | 206 | int cpu, thread; |
023695d9 SE |
207 | unsigned long flags = 0; |
208 | int pid = -1; | |
48290609 | 209 | |
0252208e ACM |
210 | if (evsel->fd == NULL && |
211 | perf_evsel__alloc_fd(evsel, cpus->nr, threads->nr) < 0) | |
4eed11d5 ACM |
212 | return -1; |
213 | ||
023695d9 SE |
214 | if (evsel->cgrp) { |
215 | flags = PERF_FLAG_PID_CGROUP; | |
216 | pid = evsel->cgrp->fd; | |
217 | } | |
218 | ||
86bd5e86 | 219 | for (cpu = 0; cpu < cpus->nr; cpu++) { |
f08199d3 | 220 | int group_fd = -1; |
9d04f178 | 221 | |
0252208e | 222 | for (thread = 0; thread < threads->nr; thread++) { |
023695d9 SE |
223 | |
224 | if (!evsel->cgrp) | |
225 | pid = threads->map[thread]; | |
226 | ||
0252208e | 227 | FD(evsel, cpu, thread) = sys_perf_event_open(&evsel->attr, |
023695d9 | 228 | pid, |
f08199d3 | 229 | cpus->map[cpu], |
023695d9 | 230 | group_fd, flags); |
0252208e ACM |
231 | if (FD(evsel, cpu, thread) < 0) |
232 | goto out_close; | |
f08199d3 ACM |
233 | |
234 | if (group && group_fd == -1) | |
235 | group_fd = FD(evsel, cpu, thread); | |
0252208e | 236 | } |
48290609 ACM |
237 | } |
238 | ||
239 | return 0; | |
240 | ||
241 | out_close: | |
0252208e ACM |
242 | do { |
243 | while (--thread >= 0) { | |
244 | close(FD(evsel, cpu, thread)); | |
245 | FD(evsel, cpu, thread) = -1; | |
246 | } | |
247 | thread = threads->nr; | |
248 | } while (--cpu >= 0); | |
48290609 ACM |
249 | return -1; |
250 | } | |
251 | ||
0252208e ACM |
252 | static struct { |
253 | struct cpu_map map; | |
254 | int cpus[1]; | |
255 | } empty_cpu_map = { | |
256 | .map.nr = 1, | |
257 | .cpus = { -1, }, | |
258 | }; | |
259 | ||
260 | static struct { | |
261 | struct thread_map map; | |
262 | int threads[1]; | |
263 | } empty_thread_map = { | |
264 | .map.nr = 1, | |
265 | .threads = { -1, }, | |
266 | }; | |
267 | ||
f08199d3 | 268 | int perf_evsel__open(struct perf_evsel *evsel, struct cpu_map *cpus, |
5d2cd909 | 269 | struct thread_map *threads, bool group) |
48290609 | 270 | { |
0252208e ACM |
271 | if (cpus == NULL) { |
272 | /* Work around old compiler warnings about strict aliasing */ | |
273 | cpus = &empty_cpu_map.map; | |
48290609 ACM |
274 | } |
275 | ||
0252208e ACM |
276 | if (threads == NULL) |
277 | threads = &empty_thread_map.map; | |
48290609 | 278 | |
5d2cd909 | 279 | return __perf_evsel__open(evsel, cpus, threads, group); |
48290609 ACM |
280 | } |
281 | ||
f08199d3 | 282 | int perf_evsel__open_per_cpu(struct perf_evsel *evsel, |
5d2cd909 | 283 | struct cpu_map *cpus, bool group) |
48290609 | 284 | { |
5d2cd909 | 285 | return __perf_evsel__open(evsel, cpus, &empty_thread_map.map, group); |
0252208e | 286 | } |
48290609 | 287 | |
f08199d3 | 288 | int perf_evsel__open_per_thread(struct perf_evsel *evsel, |
5d2cd909 | 289 | struct thread_map *threads, bool group) |
0252208e | 290 | { |
5d2cd909 | 291 | return __perf_evsel__open(evsel, &empty_cpu_map.map, threads, group); |
48290609 | 292 | } |
70082dd9 | 293 | |
8115d60c ACM |
294 | static int perf_event__parse_id_sample(const union perf_event *event, u64 type, |
295 | struct perf_sample *sample) | |
d0dd74e8 ACM |
296 | { |
297 | const u64 *array = event->sample.array; | |
298 | ||
299 | array += ((event->header.size - | |
300 | sizeof(event->header)) / sizeof(u64)) - 1; | |
301 | ||
302 | if (type & PERF_SAMPLE_CPU) { | |
303 | u32 *p = (u32 *)array; | |
304 | sample->cpu = *p; | |
305 | array--; | |
306 | } | |
307 | ||
308 | if (type & PERF_SAMPLE_STREAM_ID) { | |
309 | sample->stream_id = *array; | |
310 | array--; | |
311 | } | |
312 | ||
313 | if (type & PERF_SAMPLE_ID) { | |
314 | sample->id = *array; | |
315 | array--; | |
316 | } | |
317 | ||
318 | if (type & PERF_SAMPLE_TIME) { | |
319 | sample->time = *array; | |
320 | array--; | |
321 | } | |
322 | ||
323 | if (type & PERF_SAMPLE_TID) { | |
324 | u32 *p = (u32 *)array; | |
325 | sample->pid = p[0]; | |
326 | sample->tid = p[1]; | |
327 | } | |
328 | ||
329 | return 0; | |
330 | } | |
331 | ||
98e1da90 FW |
332 | static bool sample_overlap(const union perf_event *event, |
333 | const void *offset, u64 size) | |
334 | { | |
335 | const void *base = event; | |
336 | ||
337 | if (offset + size > base + event->header.size) | |
338 | return true; | |
339 | ||
340 | return false; | |
341 | } | |
342 | ||
8115d60c | 343 | int perf_event__parse_sample(const union perf_event *event, u64 type, |
a2854124 FW |
344 | int sample_size, bool sample_id_all, |
345 | struct perf_sample *data) | |
d0dd74e8 ACM |
346 | { |
347 | const u64 *array; | |
348 | ||
349 | data->cpu = data->pid = data->tid = -1; | |
350 | data->stream_id = data->id = data->time = -1ULL; | |
351 | ||
352 | if (event->header.type != PERF_RECORD_SAMPLE) { | |
353 | if (!sample_id_all) | |
354 | return 0; | |
8115d60c | 355 | return perf_event__parse_id_sample(event, type, data); |
d0dd74e8 ACM |
356 | } |
357 | ||
358 | array = event->sample.array; | |
359 | ||
a2854124 FW |
360 | if (sample_size + sizeof(event->header) > event->header.size) |
361 | return -EFAULT; | |
362 | ||
d0dd74e8 ACM |
363 | if (type & PERF_SAMPLE_IP) { |
364 | data->ip = event->ip.ip; | |
365 | array++; | |
366 | } | |
367 | ||
368 | if (type & PERF_SAMPLE_TID) { | |
369 | u32 *p = (u32 *)array; | |
370 | data->pid = p[0]; | |
371 | data->tid = p[1]; | |
372 | array++; | |
373 | } | |
374 | ||
375 | if (type & PERF_SAMPLE_TIME) { | |
376 | data->time = *array; | |
377 | array++; | |
378 | } | |
379 | ||
7cec0922 | 380 | data->addr = 0; |
d0dd74e8 ACM |
381 | if (type & PERF_SAMPLE_ADDR) { |
382 | data->addr = *array; | |
383 | array++; | |
384 | } | |
385 | ||
386 | data->id = -1ULL; | |
387 | if (type & PERF_SAMPLE_ID) { | |
388 | data->id = *array; | |
389 | array++; | |
390 | } | |
391 | ||
392 | if (type & PERF_SAMPLE_STREAM_ID) { | |
393 | data->stream_id = *array; | |
394 | array++; | |
395 | } | |
396 | ||
397 | if (type & PERF_SAMPLE_CPU) { | |
398 | u32 *p = (u32 *)array; | |
399 | data->cpu = *p; | |
400 | array++; | |
401 | } | |
402 | ||
403 | if (type & PERF_SAMPLE_PERIOD) { | |
404 | data->period = *array; | |
405 | array++; | |
406 | } | |
407 | ||
408 | if (type & PERF_SAMPLE_READ) { | |
409 | fprintf(stderr, "PERF_SAMPLE_READ is unsuported for now\n"); | |
410 | return -1; | |
411 | } | |
412 | ||
413 | if (type & PERF_SAMPLE_CALLCHAIN) { | |
98e1da90 FW |
414 | if (sample_overlap(event, array, sizeof(data->callchain->nr))) |
415 | return -EFAULT; | |
416 | ||
d0dd74e8 | 417 | data->callchain = (struct ip_callchain *)array; |
98e1da90 FW |
418 | |
419 | if (sample_overlap(event, array, data->callchain->nr)) | |
420 | return -EFAULT; | |
421 | ||
d0dd74e8 ACM |
422 | array += 1 + data->callchain->nr; |
423 | } | |
424 | ||
425 | if (type & PERF_SAMPLE_RAW) { | |
426 | u32 *p = (u32 *)array; | |
98e1da90 FW |
427 | |
428 | if (sample_overlap(event, array, sizeof(u32))) | |
429 | return -EFAULT; | |
430 | ||
d0dd74e8 ACM |
431 | data->raw_size = *p; |
432 | p++; | |
98e1da90 FW |
433 | |
434 | if (sample_overlap(event, p, data->raw_size)) | |
435 | return -EFAULT; | |
436 | ||
d0dd74e8 ACM |
437 | data->raw_data = p; |
438 | } | |
439 | ||
440 | return 0; | |
441 | } |