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 | ||
936be503 | 10 | #include <byteswap.h> |
0f6a3015 | 11 | #include <linux/bitops.h> |
553873e1 | 12 | #include <api/fs/debugfs.h> |
4e319027 RR |
13 | #include <traceevent/event-parse.h> |
14 | #include <linux/hw_breakpoint.h> | |
15 | #include <linux/perf_event.h> | |
bec19672 | 16 | #include <sys/resource.h> |
4e319027 | 17 | #include "asm/bug.h" |
69aad6f1 | 18 | #include "evsel.h" |
70082dd9 | 19 | #include "evlist.h" |
69aad6f1 | 20 | #include "util.h" |
86bd5e86 | 21 | #include "cpumap.h" |
fd78260b | 22 | #include "thread_map.h" |
12864b31 | 23 | #include "target.h" |
26d33022 | 24 | #include "perf_regs.h" |
e3e1a54f | 25 | #include "debug.h" |
97978b3e | 26 | #include "trace-event.h" |
69aad6f1 | 27 | |
594ac61a ACM |
28 | static struct { |
29 | bool sample_id_all; | |
30 | bool exclude_guest; | |
5c5e854b | 31 | bool mmap2; |
57480d2c | 32 | bool cloexec; |
594ac61a ACM |
33 | } perf_missing_features; |
34 | ||
c52b12ed ACM |
35 | #define FD(e, x, y) (*(int *)xyarray__entry(e->fd, x, y)) |
36 | ||
75562573 | 37 | int __perf_evsel__sample_size(u64 sample_type) |
c2a70653 ACM |
38 | { |
39 | u64 mask = sample_type & PERF_SAMPLE_MASK; | |
40 | int size = 0; | |
41 | int i; | |
42 | ||
43 | for (i = 0; i < 64; i++) { | |
44 | if (mask & (1ULL << i)) | |
45 | size++; | |
46 | } | |
47 | ||
48 | size *= sizeof(u64); | |
49 | ||
50 | return size; | |
51 | } | |
52 | ||
75562573 AH |
53 | /** |
54 | * __perf_evsel__calc_id_pos - calculate id_pos. | |
55 | * @sample_type: sample type | |
56 | * | |
57 | * This function returns the position of the event id (PERF_SAMPLE_ID or | |
58 | * PERF_SAMPLE_IDENTIFIER) in a sample event i.e. in the array of struct | |
59 | * sample_event. | |
60 | */ | |
61 | static int __perf_evsel__calc_id_pos(u64 sample_type) | |
62 | { | |
63 | int idx = 0; | |
64 | ||
65 | if (sample_type & PERF_SAMPLE_IDENTIFIER) | |
66 | return 0; | |
67 | ||
68 | if (!(sample_type & PERF_SAMPLE_ID)) | |
69 | return -1; | |
70 | ||
71 | if (sample_type & PERF_SAMPLE_IP) | |
72 | idx += 1; | |
73 | ||
74 | if (sample_type & PERF_SAMPLE_TID) | |
75 | idx += 1; | |
76 | ||
77 | if (sample_type & PERF_SAMPLE_TIME) | |
78 | idx += 1; | |
79 | ||
80 | if (sample_type & PERF_SAMPLE_ADDR) | |
81 | idx += 1; | |
82 | ||
83 | return idx; | |
84 | } | |
85 | ||
86 | /** | |
87 | * __perf_evsel__calc_is_pos - calculate is_pos. | |
88 | * @sample_type: sample type | |
89 | * | |
90 | * This function returns the position (counting backwards) of the event id | |
91 | * (PERF_SAMPLE_ID or PERF_SAMPLE_IDENTIFIER) in a non-sample event i.e. if | |
92 | * sample_id_all is used there is an id sample appended to non-sample events. | |
93 | */ | |
94 | static int __perf_evsel__calc_is_pos(u64 sample_type) | |
95 | { | |
96 | int idx = 1; | |
97 | ||
98 | if (sample_type & PERF_SAMPLE_IDENTIFIER) | |
99 | return 1; | |
100 | ||
101 | if (!(sample_type & PERF_SAMPLE_ID)) | |
102 | return -1; | |
103 | ||
104 | if (sample_type & PERF_SAMPLE_CPU) | |
105 | idx += 1; | |
106 | ||
107 | if (sample_type & PERF_SAMPLE_STREAM_ID) | |
108 | idx += 1; | |
109 | ||
110 | return idx; | |
111 | } | |
112 | ||
113 | void perf_evsel__calc_id_pos(struct perf_evsel *evsel) | |
114 | { | |
115 | evsel->id_pos = __perf_evsel__calc_id_pos(evsel->attr.sample_type); | |
116 | evsel->is_pos = __perf_evsel__calc_is_pos(evsel->attr.sample_type); | |
117 | } | |
118 | ||
4bf9ce1b | 119 | void hists__init(struct hists *hists) |
0e2a5f10 ACM |
120 | { |
121 | memset(hists, 0, sizeof(*hists)); | |
122 | hists->entries_in_array[0] = hists->entries_in_array[1] = RB_ROOT; | |
123 | hists->entries_in = &hists->entries_in_array[0]; | |
124 | hists->entries_collapsed = RB_ROOT; | |
125 | hists->entries = RB_ROOT; | |
126 | pthread_mutex_init(&hists->lock, NULL); | |
127 | } | |
128 | ||
7be5ebe8 ACM |
129 | void __perf_evsel__set_sample_bit(struct perf_evsel *evsel, |
130 | enum perf_event_sample_format bit) | |
131 | { | |
132 | if (!(evsel->attr.sample_type & bit)) { | |
133 | evsel->attr.sample_type |= bit; | |
134 | evsel->sample_size += sizeof(u64); | |
75562573 | 135 | perf_evsel__calc_id_pos(evsel); |
7be5ebe8 ACM |
136 | } |
137 | } | |
138 | ||
139 | void __perf_evsel__reset_sample_bit(struct perf_evsel *evsel, | |
140 | enum perf_event_sample_format bit) | |
141 | { | |
142 | if (evsel->attr.sample_type & bit) { | |
143 | evsel->attr.sample_type &= ~bit; | |
144 | evsel->sample_size -= sizeof(u64); | |
75562573 | 145 | perf_evsel__calc_id_pos(evsel); |
7be5ebe8 ACM |
146 | } |
147 | } | |
148 | ||
75562573 AH |
149 | void perf_evsel__set_sample_id(struct perf_evsel *evsel, |
150 | bool can_sample_identifier) | |
7a5a5ca5 | 151 | { |
75562573 AH |
152 | if (can_sample_identifier) { |
153 | perf_evsel__reset_sample_bit(evsel, ID); | |
154 | perf_evsel__set_sample_bit(evsel, IDENTIFIER); | |
155 | } else { | |
156 | perf_evsel__set_sample_bit(evsel, ID); | |
157 | } | |
7a5a5ca5 ACM |
158 | evsel->attr.read_format |= PERF_FORMAT_ID; |
159 | } | |
160 | ||
ef1d1af2 ACM |
161 | void perf_evsel__init(struct perf_evsel *evsel, |
162 | struct perf_event_attr *attr, int idx) | |
163 | { | |
164 | evsel->idx = idx; | |
60b0896c | 165 | evsel->tracking = !idx; |
ef1d1af2 | 166 | evsel->attr = *attr; |
2cfda562 | 167 | evsel->leader = evsel; |
410136f5 SE |
168 | evsel->unit = ""; |
169 | evsel->scale = 1.0; | |
ef1d1af2 | 170 | INIT_LIST_HEAD(&evsel->node); |
1980c2eb | 171 | hists__init(&evsel->hists); |
bde09467 | 172 | evsel->sample_size = __perf_evsel__sample_size(attr->sample_type); |
75562573 | 173 | perf_evsel__calc_id_pos(evsel); |
ef1d1af2 ACM |
174 | } |
175 | ||
ef503831 | 176 | struct perf_evsel *perf_evsel__new_idx(struct perf_event_attr *attr, int idx) |
69aad6f1 ACM |
177 | { |
178 | struct perf_evsel *evsel = zalloc(sizeof(*evsel)); | |
179 | ||
ef1d1af2 ACM |
180 | if (evsel != NULL) |
181 | perf_evsel__init(evsel, attr, idx); | |
69aad6f1 ACM |
182 | |
183 | return evsel; | |
184 | } | |
185 | ||
ef503831 | 186 | struct perf_evsel *perf_evsel__newtp_idx(const char *sys, const char *name, int idx) |
efd2b924 ACM |
187 | { |
188 | struct perf_evsel *evsel = zalloc(sizeof(*evsel)); | |
189 | ||
190 | if (evsel != NULL) { | |
191 | struct perf_event_attr attr = { | |
0b80f8b3 ACM |
192 | .type = PERF_TYPE_TRACEPOINT, |
193 | .sample_type = (PERF_SAMPLE_RAW | PERF_SAMPLE_TIME | | |
194 | PERF_SAMPLE_CPU | PERF_SAMPLE_PERIOD), | |
efd2b924 ACM |
195 | }; |
196 | ||
e48ffe2b ACM |
197 | if (asprintf(&evsel->name, "%s:%s", sys, name) < 0) |
198 | goto out_free; | |
199 | ||
97978b3e | 200 | evsel->tp_format = trace_event__tp_format(sys, name); |
efd2b924 ACM |
201 | if (evsel->tp_format == NULL) |
202 | goto out_free; | |
203 | ||
0b80f8b3 | 204 | event_attr_init(&attr); |
efd2b924 | 205 | attr.config = evsel->tp_format->id; |
0b80f8b3 | 206 | attr.sample_period = 1; |
efd2b924 | 207 | perf_evsel__init(evsel, &attr, idx); |
efd2b924 ACM |
208 | } |
209 | ||
210 | return evsel; | |
211 | ||
212 | out_free: | |
74cf249d | 213 | zfree(&evsel->name); |
efd2b924 ACM |
214 | free(evsel); |
215 | return NULL; | |
216 | } | |
217 | ||
8ad7013b | 218 | const char *perf_evsel__hw_names[PERF_COUNT_HW_MAX] = { |
c410431c ACM |
219 | "cycles", |
220 | "instructions", | |
221 | "cache-references", | |
222 | "cache-misses", | |
223 | "branches", | |
224 | "branch-misses", | |
225 | "bus-cycles", | |
226 | "stalled-cycles-frontend", | |
227 | "stalled-cycles-backend", | |
228 | "ref-cycles", | |
229 | }; | |
230 | ||
dd4f5223 | 231 | static const char *__perf_evsel__hw_name(u64 config) |
c410431c ACM |
232 | { |
233 | if (config < PERF_COUNT_HW_MAX && perf_evsel__hw_names[config]) | |
234 | return perf_evsel__hw_names[config]; | |
235 | ||
236 | return "unknown-hardware"; | |
237 | } | |
238 | ||
27f18617 | 239 | static int perf_evsel__add_modifiers(struct perf_evsel *evsel, char *bf, size_t size) |
c410431c | 240 | { |
27f18617 | 241 | int colon = 0, r = 0; |
c410431c | 242 | struct perf_event_attr *attr = &evsel->attr; |
c410431c ACM |
243 | bool exclude_guest_default = false; |
244 | ||
245 | #define MOD_PRINT(context, mod) do { \ | |
246 | if (!attr->exclude_##context) { \ | |
27f18617 | 247 | if (!colon) colon = ++r; \ |
c410431c ACM |
248 | r += scnprintf(bf + r, size - r, "%c", mod); \ |
249 | } } while(0) | |
250 | ||
251 | if (attr->exclude_kernel || attr->exclude_user || attr->exclude_hv) { | |
252 | MOD_PRINT(kernel, 'k'); | |
253 | MOD_PRINT(user, 'u'); | |
254 | MOD_PRINT(hv, 'h'); | |
255 | exclude_guest_default = true; | |
256 | } | |
257 | ||
258 | if (attr->precise_ip) { | |
259 | if (!colon) | |
27f18617 | 260 | colon = ++r; |
c410431c ACM |
261 | r += scnprintf(bf + r, size - r, "%.*s", attr->precise_ip, "ppp"); |
262 | exclude_guest_default = true; | |
263 | } | |
264 | ||
265 | if (attr->exclude_host || attr->exclude_guest == exclude_guest_default) { | |
266 | MOD_PRINT(host, 'H'); | |
267 | MOD_PRINT(guest, 'G'); | |
268 | } | |
269 | #undef MOD_PRINT | |
270 | if (colon) | |
27f18617 | 271 | bf[colon - 1] = ':'; |
c410431c ACM |
272 | return r; |
273 | } | |
274 | ||
27f18617 ACM |
275 | static int perf_evsel__hw_name(struct perf_evsel *evsel, char *bf, size_t size) |
276 | { | |
277 | int r = scnprintf(bf, size, "%s", __perf_evsel__hw_name(evsel->attr.config)); | |
278 | return r + perf_evsel__add_modifiers(evsel, bf + r, size - r); | |
279 | } | |
280 | ||
8ad7013b | 281 | const char *perf_evsel__sw_names[PERF_COUNT_SW_MAX] = { |
335c2f5d ACM |
282 | "cpu-clock", |
283 | "task-clock", | |
284 | "page-faults", | |
285 | "context-switches", | |
8ad7013b | 286 | "cpu-migrations", |
335c2f5d ACM |
287 | "minor-faults", |
288 | "major-faults", | |
289 | "alignment-faults", | |
290 | "emulation-faults", | |
d22d1a2a | 291 | "dummy", |
335c2f5d ACM |
292 | }; |
293 | ||
dd4f5223 | 294 | static const char *__perf_evsel__sw_name(u64 config) |
335c2f5d ACM |
295 | { |
296 | if (config < PERF_COUNT_SW_MAX && perf_evsel__sw_names[config]) | |
297 | return perf_evsel__sw_names[config]; | |
298 | return "unknown-software"; | |
299 | } | |
300 | ||
301 | static int perf_evsel__sw_name(struct perf_evsel *evsel, char *bf, size_t size) | |
302 | { | |
303 | int r = scnprintf(bf, size, "%s", __perf_evsel__sw_name(evsel->attr.config)); | |
304 | return r + perf_evsel__add_modifiers(evsel, bf + r, size - r); | |
305 | } | |
306 | ||
287e74aa JO |
307 | static int __perf_evsel__bp_name(char *bf, size_t size, u64 addr, u64 type) |
308 | { | |
309 | int r; | |
310 | ||
311 | r = scnprintf(bf, size, "mem:0x%" PRIx64 ":", addr); | |
312 | ||
313 | if (type & HW_BREAKPOINT_R) | |
314 | r += scnprintf(bf + r, size - r, "r"); | |
315 | ||
316 | if (type & HW_BREAKPOINT_W) | |
317 | r += scnprintf(bf + r, size - r, "w"); | |
318 | ||
319 | if (type & HW_BREAKPOINT_X) | |
320 | r += scnprintf(bf + r, size - r, "x"); | |
321 | ||
322 | return r; | |
323 | } | |
324 | ||
325 | static int perf_evsel__bp_name(struct perf_evsel *evsel, char *bf, size_t size) | |
326 | { | |
327 | struct perf_event_attr *attr = &evsel->attr; | |
328 | int r = __perf_evsel__bp_name(bf, size, attr->bp_addr, attr->bp_type); | |
329 | return r + perf_evsel__add_modifiers(evsel, bf + r, size - r); | |
330 | } | |
331 | ||
0b668bc9 ACM |
332 | const char *perf_evsel__hw_cache[PERF_COUNT_HW_CACHE_MAX] |
333 | [PERF_EVSEL__MAX_ALIASES] = { | |
334 | { "L1-dcache", "l1-d", "l1d", "L1-data", }, | |
335 | { "L1-icache", "l1-i", "l1i", "L1-instruction", }, | |
336 | { "LLC", "L2", }, | |
337 | { "dTLB", "d-tlb", "Data-TLB", }, | |
338 | { "iTLB", "i-tlb", "Instruction-TLB", }, | |
339 | { "branch", "branches", "bpu", "btb", "bpc", }, | |
340 | { "node", }, | |
341 | }; | |
342 | ||
343 | const char *perf_evsel__hw_cache_op[PERF_COUNT_HW_CACHE_OP_MAX] | |
344 | [PERF_EVSEL__MAX_ALIASES] = { | |
345 | { "load", "loads", "read", }, | |
346 | { "store", "stores", "write", }, | |
347 | { "prefetch", "prefetches", "speculative-read", "speculative-load", }, | |
348 | }; | |
349 | ||
350 | const char *perf_evsel__hw_cache_result[PERF_COUNT_HW_CACHE_RESULT_MAX] | |
351 | [PERF_EVSEL__MAX_ALIASES] = { | |
352 | { "refs", "Reference", "ops", "access", }, | |
353 | { "misses", "miss", }, | |
354 | }; | |
355 | ||
356 | #define C(x) PERF_COUNT_HW_CACHE_##x | |
357 | #define CACHE_READ (1 << C(OP_READ)) | |
358 | #define CACHE_WRITE (1 << C(OP_WRITE)) | |
359 | #define CACHE_PREFETCH (1 << C(OP_PREFETCH)) | |
360 | #define COP(x) (1 << x) | |
361 | ||
362 | /* | |
363 | * cache operartion stat | |
364 | * L1I : Read and prefetch only | |
365 | * ITLB and BPU : Read-only | |
366 | */ | |
367 | static unsigned long perf_evsel__hw_cache_stat[C(MAX)] = { | |
368 | [C(L1D)] = (CACHE_READ | CACHE_WRITE | CACHE_PREFETCH), | |
369 | [C(L1I)] = (CACHE_READ | CACHE_PREFETCH), | |
370 | [C(LL)] = (CACHE_READ | CACHE_WRITE | CACHE_PREFETCH), | |
371 | [C(DTLB)] = (CACHE_READ | CACHE_WRITE | CACHE_PREFETCH), | |
372 | [C(ITLB)] = (CACHE_READ), | |
373 | [C(BPU)] = (CACHE_READ), | |
374 | [C(NODE)] = (CACHE_READ | CACHE_WRITE | CACHE_PREFETCH), | |
375 | }; | |
376 | ||
377 | bool perf_evsel__is_cache_op_valid(u8 type, u8 op) | |
378 | { | |
379 | if (perf_evsel__hw_cache_stat[type] & COP(op)) | |
380 | return true; /* valid */ | |
381 | else | |
382 | return false; /* invalid */ | |
383 | } | |
384 | ||
385 | int __perf_evsel__hw_cache_type_op_res_name(u8 type, u8 op, u8 result, | |
386 | char *bf, size_t size) | |
387 | { | |
388 | if (result) { | |
389 | return scnprintf(bf, size, "%s-%s-%s", perf_evsel__hw_cache[type][0], | |
390 | perf_evsel__hw_cache_op[op][0], | |
391 | perf_evsel__hw_cache_result[result][0]); | |
392 | } | |
393 | ||
394 | return scnprintf(bf, size, "%s-%s", perf_evsel__hw_cache[type][0], | |
395 | perf_evsel__hw_cache_op[op][1]); | |
396 | } | |
397 | ||
dd4f5223 | 398 | static int __perf_evsel__hw_cache_name(u64 config, char *bf, size_t size) |
0b668bc9 ACM |
399 | { |
400 | u8 op, result, type = (config >> 0) & 0xff; | |
401 | const char *err = "unknown-ext-hardware-cache-type"; | |
402 | ||
403 | if (type > PERF_COUNT_HW_CACHE_MAX) | |
404 | goto out_err; | |
405 | ||
406 | op = (config >> 8) & 0xff; | |
407 | err = "unknown-ext-hardware-cache-op"; | |
408 | if (op > PERF_COUNT_HW_CACHE_OP_MAX) | |
409 | goto out_err; | |
410 | ||
411 | result = (config >> 16) & 0xff; | |
412 | err = "unknown-ext-hardware-cache-result"; | |
413 | if (result > PERF_COUNT_HW_CACHE_RESULT_MAX) | |
414 | goto out_err; | |
415 | ||
416 | err = "invalid-cache"; | |
417 | if (!perf_evsel__is_cache_op_valid(type, op)) | |
418 | goto out_err; | |
419 | ||
420 | return __perf_evsel__hw_cache_type_op_res_name(type, op, result, bf, size); | |
421 | out_err: | |
422 | return scnprintf(bf, size, "%s", err); | |
423 | } | |
424 | ||
425 | static int perf_evsel__hw_cache_name(struct perf_evsel *evsel, char *bf, size_t size) | |
426 | { | |
427 | int ret = __perf_evsel__hw_cache_name(evsel->attr.config, bf, size); | |
428 | return ret + perf_evsel__add_modifiers(evsel, bf + ret, size - ret); | |
429 | } | |
430 | ||
6eef3d9c ACM |
431 | static int perf_evsel__raw_name(struct perf_evsel *evsel, char *bf, size_t size) |
432 | { | |
433 | int ret = scnprintf(bf, size, "raw 0x%" PRIx64, evsel->attr.config); | |
434 | return ret + perf_evsel__add_modifiers(evsel, bf + ret, size - ret); | |
435 | } | |
436 | ||
7289f83c | 437 | const char *perf_evsel__name(struct perf_evsel *evsel) |
a4460836 | 438 | { |
7289f83c | 439 | char bf[128]; |
a4460836 | 440 | |
7289f83c ACM |
441 | if (evsel->name) |
442 | return evsel->name; | |
c410431c ACM |
443 | |
444 | switch (evsel->attr.type) { | |
445 | case PERF_TYPE_RAW: | |
6eef3d9c | 446 | perf_evsel__raw_name(evsel, bf, sizeof(bf)); |
c410431c ACM |
447 | break; |
448 | ||
449 | case PERF_TYPE_HARDWARE: | |
7289f83c | 450 | perf_evsel__hw_name(evsel, bf, sizeof(bf)); |
c410431c | 451 | break; |
0b668bc9 ACM |
452 | |
453 | case PERF_TYPE_HW_CACHE: | |
7289f83c | 454 | perf_evsel__hw_cache_name(evsel, bf, sizeof(bf)); |
0b668bc9 ACM |
455 | break; |
456 | ||
335c2f5d | 457 | case PERF_TYPE_SOFTWARE: |
7289f83c | 458 | perf_evsel__sw_name(evsel, bf, sizeof(bf)); |
335c2f5d ACM |
459 | break; |
460 | ||
a4460836 | 461 | case PERF_TYPE_TRACEPOINT: |
7289f83c | 462 | scnprintf(bf, sizeof(bf), "%s", "unknown tracepoint"); |
a4460836 ACM |
463 | break; |
464 | ||
287e74aa JO |
465 | case PERF_TYPE_BREAKPOINT: |
466 | perf_evsel__bp_name(evsel, bf, sizeof(bf)); | |
467 | break; | |
468 | ||
c410431c | 469 | default: |
ca1b1457 RR |
470 | scnprintf(bf, sizeof(bf), "unknown attr type: %d", |
471 | evsel->attr.type); | |
a4460836 | 472 | break; |
c410431c ACM |
473 | } |
474 | ||
7289f83c ACM |
475 | evsel->name = strdup(bf); |
476 | ||
477 | return evsel->name ?: "unknown"; | |
c410431c ACM |
478 | } |
479 | ||
717e263f NK |
480 | const char *perf_evsel__group_name(struct perf_evsel *evsel) |
481 | { | |
482 | return evsel->group_name ?: "anon group"; | |
483 | } | |
484 | ||
485 | int perf_evsel__group_desc(struct perf_evsel *evsel, char *buf, size_t size) | |
486 | { | |
487 | int ret; | |
488 | struct perf_evsel *pos; | |
489 | const char *group_name = perf_evsel__group_name(evsel); | |
490 | ||
491 | ret = scnprintf(buf, size, "%s", group_name); | |
492 | ||
493 | ret += scnprintf(buf + ret, size - ret, " { %s", | |
494 | perf_evsel__name(evsel)); | |
495 | ||
496 | for_each_group_member(pos, evsel) | |
497 | ret += scnprintf(buf + ret, size - ret, ", %s", | |
498 | perf_evsel__name(pos)); | |
499 | ||
500 | ret += scnprintf(buf + ret, size - ret, " }"); | |
501 | ||
502 | return ret; | |
503 | } | |
504 | ||
6bedfab6 JO |
505 | static void |
506 | perf_evsel__config_callgraph(struct perf_evsel *evsel, | |
507 | struct record_opts *opts) | |
508 | { | |
509 | bool function = perf_evsel__is_function_event(evsel); | |
510 | struct perf_event_attr *attr = &evsel->attr; | |
511 | ||
512 | perf_evsel__set_sample_bit(evsel, CALLCHAIN); | |
513 | ||
514 | if (opts->call_graph == CALLCHAIN_DWARF) { | |
515 | if (!function) { | |
516 | perf_evsel__set_sample_bit(evsel, REGS_USER); | |
517 | perf_evsel__set_sample_bit(evsel, STACK_USER); | |
518 | attr->sample_regs_user = PERF_REGS_MASK; | |
519 | attr->sample_stack_user = opts->stack_dump_size; | |
520 | attr->exclude_callchain_user = 1; | |
521 | } else { | |
522 | pr_info("Cannot use DWARF unwind for function trace event," | |
523 | " falling back to framepointers.\n"); | |
524 | } | |
525 | } | |
526 | ||
527 | if (function) { | |
528 | pr_info("Disabling user space callchains for function trace event.\n"); | |
529 | attr->exclude_callchain_user = 1; | |
530 | } | |
531 | } | |
532 | ||
774cb499 JO |
533 | /* |
534 | * The enable_on_exec/disabled value strategy: | |
535 | * | |
536 | * 1) For any type of traced program: | |
537 | * - all independent events and group leaders are disabled | |
538 | * - all group members are enabled | |
539 | * | |
540 | * Group members are ruled by group leaders. They need to | |
541 | * be enabled, because the group scheduling relies on that. | |
542 | * | |
543 | * 2) For traced programs executed by perf: | |
544 | * - all independent events and group leaders have | |
545 | * enable_on_exec set | |
546 | * - we don't specifically enable or disable any event during | |
547 | * the record command | |
548 | * | |
549 | * Independent events and group leaders are initially disabled | |
550 | * and get enabled by exec. Group members are ruled by group | |
551 | * leaders as stated in 1). | |
552 | * | |
553 | * 3) For traced programs attached by perf (pid/tid): | |
554 | * - we specifically enable or disable all events during | |
555 | * the record command | |
556 | * | |
557 | * When attaching events to already running traced we | |
558 | * enable/disable events specifically, as there's no | |
559 | * initial traced exec call. | |
560 | */ | |
b4006796 | 561 | void perf_evsel__config(struct perf_evsel *evsel, struct record_opts *opts) |
0f82ebc4 | 562 | { |
3c176311 | 563 | struct perf_evsel *leader = evsel->leader; |
0f82ebc4 | 564 | struct perf_event_attr *attr = &evsel->attr; |
60b0896c | 565 | int track = evsel->tracking; |
3aa5939d | 566 | bool per_cpu = opts->target.default_per_cpu && !opts->target.per_thread; |
0f82ebc4 | 567 | |
594ac61a | 568 | attr->sample_id_all = perf_missing_features.sample_id_all ? 0 : 1; |
0f82ebc4 | 569 | attr->inherit = !opts->no_inherit; |
0f82ebc4 | 570 | |
7be5ebe8 ACM |
571 | perf_evsel__set_sample_bit(evsel, IP); |
572 | perf_evsel__set_sample_bit(evsel, TID); | |
0f82ebc4 | 573 | |
3c176311 JO |
574 | if (evsel->sample_read) { |
575 | perf_evsel__set_sample_bit(evsel, READ); | |
576 | ||
577 | /* | |
578 | * We need ID even in case of single event, because | |
579 | * PERF_SAMPLE_READ process ID specific data. | |
580 | */ | |
75562573 | 581 | perf_evsel__set_sample_id(evsel, false); |
3c176311 JO |
582 | |
583 | /* | |
584 | * Apply group format only if we belong to group | |
585 | * with more than one members. | |
586 | */ | |
587 | if (leader->nr_members > 1) { | |
588 | attr->read_format |= PERF_FORMAT_GROUP; | |
589 | attr->inherit = 0; | |
590 | } | |
591 | } | |
592 | ||
0f82ebc4 | 593 | /* |
17314e23 | 594 | * We default some events to have a default interval. But keep |
0f82ebc4 ACM |
595 | * it a weak assumption overridable by the user. |
596 | */ | |
17314e23 | 597 | if (!attr->sample_period || (opts->user_freq != UINT_MAX || |
0f82ebc4 ACM |
598 | opts->user_interval != ULLONG_MAX)) { |
599 | if (opts->freq) { | |
7be5ebe8 | 600 | perf_evsel__set_sample_bit(evsel, PERIOD); |
0f82ebc4 ACM |
601 | attr->freq = 1; |
602 | attr->sample_freq = opts->freq; | |
603 | } else { | |
604 | attr->sample_period = opts->default_interval; | |
605 | } | |
606 | } | |
607 | ||
3c176311 JO |
608 | /* |
609 | * Disable sampling for all group members other | |
610 | * than leader in case leader 'leads' the sampling. | |
611 | */ | |
612 | if ((leader != evsel) && leader->sample_read) { | |
613 | attr->sample_freq = 0; | |
614 | attr->sample_period = 0; | |
615 | } | |
616 | ||
0f82ebc4 ACM |
617 | if (opts->no_samples) |
618 | attr->sample_freq = 0; | |
619 | ||
620 | if (opts->inherit_stat) | |
621 | attr->inherit_stat = 1; | |
622 | ||
623 | if (opts->sample_address) { | |
7be5ebe8 | 624 | perf_evsel__set_sample_bit(evsel, ADDR); |
0f82ebc4 ACM |
625 | attr->mmap_data = track; |
626 | } | |
627 | ||
6ff1ce76 | 628 | if (opts->call_graph_enabled && !evsel->no_aux_samples) |
6bedfab6 | 629 | perf_evsel__config_callgraph(evsel, opts); |
26d33022 | 630 | |
3aa5939d | 631 | if (target__has_cpu(&opts->target)) |
7be5ebe8 | 632 | perf_evsel__set_sample_bit(evsel, CPU); |
0f82ebc4 | 633 | |
3e76ac78 | 634 | if (opts->period) |
7be5ebe8 | 635 | perf_evsel__set_sample_bit(evsel, PERIOD); |
3e76ac78 | 636 | |
8affc2b8 AK |
637 | /* |
638 | * When the user explicitely disabled time don't force it here. | |
639 | */ | |
640 | if (opts->sample_time && | |
641 | (!perf_missing_features.sample_id_all && | |
642 | (!opts->no_inherit || target__has_cpu(&opts->target) || per_cpu))) | |
7be5ebe8 | 643 | perf_evsel__set_sample_bit(evsel, TIME); |
0f82ebc4 | 644 | |
6ff1ce76 | 645 | if (opts->raw_samples && !evsel->no_aux_samples) { |
7be5ebe8 ACM |
646 | perf_evsel__set_sample_bit(evsel, TIME); |
647 | perf_evsel__set_sample_bit(evsel, RAW); | |
648 | perf_evsel__set_sample_bit(evsel, CPU); | |
0f82ebc4 ACM |
649 | } |
650 | ||
ccf49bfc | 651 | if (opts->sample_address) |
1e7ed5ec | 652 | perf_evsel__set_sample_bit(evsel, DATA_SRC); |
ccf49bfc | 653 | |
509051ea | 654 | if (opts->no_buffering) { |
0f82ebc4 ACM |
655 | attr->watermark = 0; |
656 | attr->wakeup_events = 1; | |
657 | } | |
6ff1ce76 | 658 | if (opts->branch_stack && !evsel->no_aux_samples) { |
7be5ebe8 | 659 | perf_evsel__set_sample_bit(evsel, BRANCH_STACK); |
bdfebd84 RAV |
660 | attr->branch_sample_type = opts->branch_stack; |
661 | } | |
0f82ebc4 | 662 | |
05484298 | 663 | if (opts->sample_weight) |
1e7ed5ec | 664 | perf_evsel__set_sample_bit(evsel, WEIGHT); |
05484298 | 665 | |
5c5e854b | 666 | attr->mmap = track; |
a5a5ba72 | 667 | attr->mmap2 = track && !perf_missing_features.mmap2; |
5c5e854b | 668 | attr->comm = track; |
0f82ebc4 | 669 | |
475eeab9 | 670 | if (opts->sample_transaction) |
1e7ed5ec | 671 | perf_evsel__set_sample_bit(evsel, TRANSACTION); |
475eeab9 | 672 | |
774cb499 JO |
673 | /* |
674 | * XXX see the function comment above | |
675 | * | |
676 | * Disabling only independent events or group leaders, | |
677 | * keeping group members enabled. | |
678 | */ | |
823254ed | 679 | if (perf_evsel__is_group_leader(evsel)) |
774cb499 JO |
680 | attr->disabled = 1; |
681 | ||
682 | /* | |
683 | * Setting enable_on_exec for independent events and | |
684 | * group leaders for traced executed by perf. | |
685 | */ | |
6619a53e AK |
686 | if (target__none(&opts->target) && perf_evsel__is_group_leader(evsel) && |
687 | !opts->initial_delay) | |
0f82ebc4 | 688 | attr->enable_on_exec = 1; |
2afd2bcf AH |
689 | |
690 | if (evsel->immediate) { | |
691 | attr->disabled = 0; | |
692 | attr->enable_on_exec = 0; | |
693 | } | |
0f82ebc4 ACM |
694 | } |
695 | ||
69aad6f1 ACM |
696 | int perf_evsel__alloc_fd(struct perf_evsel *evsel, int ncpus, int nthreads) |
697 | { | |
4af4c955 | 698 | int cpu, thread; |
bf8e8f4b AH |
699 | |
700 | if (evsel->system_wide) | |
701 | nthreads = 1; | |
702 | ||
69aad6f1 | 703 | evsel->fd = xyarray__new(ncpus, nthreads, sizeof(int)); |
4af4c955 DA |
704 | |
705 | if (evsel->fd) { | |
706 | for (cpu = 0; cpu < ncpus; cpu++) { | |
707 | for (thread = 0; thread < nthreads; thread++) { | |
708 | FD(evsel, cpu, thread) = -1; | |
709 | } | |
710 | } | |
711 | } | |
712 | ||
69aad6f1 ACM |
713 | return evsel->fd != NULL ? 0 : -ENOMEM; |
714 | } | |
715 | ||
e2407bef AK |
716 | static int perf_evsel__run_ioctl(struct perf_evsel *evsel, int ncpus, int nthreads, |
717 | int ioc, void *arg) | |
745cefc5 ACM |
718 | { |
719 | int cpu, thread; | |
720 | ||
bf8e8f4b AH |
721 | if (evsel->system_wide) |
722 | nthreads = 1; | |
723 | ||
745cefc5 ACM |
724 | for (cpu = 0; cpu < ncpus; cpu++) { |
725 | for (thread = 0; thread < nthreads; thread++) { | |
726 | int fd = FD(evsel, cpu, thread), | |
e2407bef | 727 | err = ioctl(fd, ioc, arg); |
745cefc5 ACM |
728 | |
729 | if (err) | |
730 | return err; | |
731 | } | |
732 | } | |
733 | ||
734 | return 0; | |
735 | } | |
736 | ||
e2407bef AK |
737 | int perf_evsel__set_filter(struct perf_evsel *evsel, int ncpus, int nthreads, |
738 | const char *filter) | |
739 | { | |
740 | return perf_evsel__run_ioctl(evsel, ncpus, nthreads, | |
741 | PERF_EVENT_IOC_SET_FILTER, | |
742 | (void *)filter); | |
743 | } | |
744 | ||
745 | int perf_evsel__enable(struct perf_evsel *evsel, int ncpus, int nthreads) | |
746 | { | |
747 | return perf_evsel__run_ioctl(evsel, ncpus, nthreads, | |
748 | PERF_EVENT_IOC_ENABLE, | |
749 | 0); | |
750 | } | |
751 | ||
70db7533 ACM |
752 | int perf_evsel__alloc_id(struct perf_evsel *evsel, int ncpus, int nthreads) |
753 | { | |
bf8e8f4b AH |
754 | if (evsel->system_wide) |
755 | nthreads = 1; | |
756 | ||
a91e5431 ACM |
757 | evsel->sample_id = xyarray__new(ncpus, nthreads, sizeof(struct perf_sample_id)); |
758 | if (evsel->sample_id == NULL) | |
759 | return -ENOMEM; | |
760 | ||
761 | evsel->id = zalloc(ncpus * nthreads * sizeof(u64)); | |
762 | if (evsel->id == NULL) { | |
763 | xyarray__delete(evsel->sample_id); | |
764 | evsel->sample_id = NULL; | |
765 | return -ENOMEM; | |
766 | } | |
767 | ||
768 | return 0; | |
70db7533 ACM |
769 | } |
770 | ||
a7e191c3 FD |
771 | void perf_evsel__reset_counts(struct perf_evsel *evsel, int ncpus) |
772 | { | |
773 | memset(evsel->counts, 0, (sizeof(*evsel->counts) + | |
774 | (ncpus * sizeof(struct perf_counts_values)))); | |
775 | } | |
776 | ||
c52b12ed ACM |
777 | int perf_evsel__alloc_counts(struct perf_evsel *evsel, int ncpus) |
778 | { | |
779 | evsel->counts = zalloc((sizeof(*evsel->counts) + | |
780 | (ncpus * sizeof(struct perf_counts_values)))); | |
781 | return evsel->counts != NULL ? 0 : -ENOMEM; | |
782 | } | |
783 | ||
69aad6f1 ACM |
784 | void perf_evsel__free_fd(struct perf_evsel *evsel) |
785 | { | |
786 | xyarray__delete(evsel->fd); | |
787 | evsel->fd = NULL; | |
788 | } | |
789 | ||
70db7533 ACM |
790 | void perf_evsel__free_id(struct perf_evsel *evsel) |
791 | { | |
a91e5431 ACM |
792 | xyarray__delete(evsel->sample_id); |
793 | evsel->sample_id = NULL; | |
04662523 | 794 | zfree(&evsel->id); |
70db7533 ACM |
795 | } |
796 | ||
c52b12ed ACM |
797 | void perf_evsel__close_fd(struct perf_evsel *evsel, int ncpus, int nthreads) |
798 | { | |
799 | int cpu, thread; | |
800 | ||
bf8e8f4b AH |
801 | if (evsel->system_wide) |
802 | nthreads = 1; | |
803 | ||
c52b12ed ACM |
804 | for (cpu = 0; cpu < ncpus; cpu++) |
805 | for (thread = 0; thread < nthreads; ++thread) { | |
806 | close(FD(evsel, cpu, thread)); | |
807 | FD(evsel, cpu, thread) = -1; | |
808 | } | |
809 | } | |
810 | ||
43f8e76e NK |
811 | void perf_evsel__free_counts(struct perf_evsel *evsel) |
812 | { | |
74cf249d | 813 | zfree(&evsel->counts); |
43f8e76e NK |
814 | } |
815 | ||
ef1d1af2 | 816 | void perf_evsel__exit(struct perf_evsel *evsel) |
69aad6f1 ACM |
817 | { |
818 | assert(list_empty(&evsel->node)); | |
736b05a0 NK |
819 | perf_evsel__free_fd(evsel); |
820 | perf_evsel__free_id(evsel); | |
ef1d1af2 ACM |
821 | } |
822 | ||
823 | void perf_evsel__delete(struct perf_evsel *evsel) | |
824 | { | |
825 | perf_evsel__exit(evsel); | |
023695d9 | 826 | close_cgroup(evsel->cgrp); |
74cf249d | 827 | zfree(&evsel->group_name); |
e48ffe2b | 828 | if (evsel->tp_format) |
efd2b924 | 829 | pevent_free_format(evsel->tp_format); |
74cf249d | 830 | zfree(&evsel->name); |
69aad6f1 ACM |
831 | free(evsel); |
832 | } | |
c52b12ed | 833 | |
c7a79c47 SE |
834 | static inline void compute_deltas(struct perf_evsel *evsel, |
835 | int cpu, | |
836 | struct perf_counts_values *count) | |
837 | { | |
838 | struct perf_counts_values tmp; | |
839 | ||
840 | if (!evsel->prev_raw_counts) | |
841 | return; | |
842 | ||
843 | if (cpu == -1) { | |
844 | tmp = evsel->prev_raw_counts->aggr; | |
845 | evsel->prev_raw_counts->aggr = *count; | |
846 | } else { | |
847 | tmp = evsel->prev_raw_counts->cpu[cpu]; | |
848 | evsel->prev_raw_counts->cpu[cpu] = *count; | |
849 | } | |
850 | ||
851 | count->val = count->val - tmp.val; | |
852 | count->ena = count->ena - tmp.ena; | |
853 | count->run = count->run - tmp.run; | |
854 | } | |
855 | ||
c52b12ed ACM |
856 | int __perf_evsel__read_on_cpu(struct perf_evsel *evsel, |
857 | int cpu, int thread, bool scale) | |
858 | { | |
859 | struct perf_counts_values count; | |
860 | size_t nv = scale ? 3 : 1; | |
861 | ||
862 | if (FD(evsel, cpu, thread) < 0) | |
863 | return -EINVAL; | |
864 | ||
4eed11d5 ACM |
865 | if (evsel->counts == NULL && perf_evsel__alloc_counts(evsel, cpu + 1) < 0) |
866 | return -ENOMEM; | |
867 | ||
c52b12ed ACM |
868 | if (readn(FD(evsel, cpu, thread), &count, nv * sizeof(u64)) < 0) |
869 | return -errno; | |
870 | ||
c7a79c47 SE |
871 | compute_deltas(evsel, cpu, &count); |
872 | ||
c52b12ed ACM |
873 | if (scale) { |
874 | if (count.run == 0) | |
875 | count.val = 0; | |
876 | else if (count.run < count.ena) | |
877 | count.val = (u64)((double)count.val * count.ena / count.run + 0.5); | |
878 | } else | |
879 | count.ena = count.run = 0; | |
880 | ||
881 | evsel->counts->cpu[cpu] = count; | |
882 | return 0; | |
883 | } | |
884 | ||
885 | int __perf_evsel__read(struct perf_evsel *evsel, | |
886 | int ncpus, int nthreads, bool scale) | |
887 | { | |
888 | size_t nv = scale ? 3 : 1; | |
889 | int cpu, thread; | |
890 | struct perf_counts_values *aggr = &evsel->counts->aggr, count; | |
891 | ||
bf8e8f4b AH |
892 | if (evsel->system_wide) |
893 | nthreads = 1; | |
894 | ||
52bcd994 | 895 | aggr->val = aggr->ena = aggr->run = 0; |
c52b12ed ACM |
896 | |
897 | for (cpu = 0; cpu < ncpus; cpu++) { | |
898 | for (thread = 0; thread < nthreads; thread++) { | |
899 | if (FD(evsel, cpu, thread) < 0) | |
900 | continue; | |
901 | ||
902 | if (readn(FD(evsel, cpu, thread), | |
903 | &count, nv * sizeof(u64)) < 0) | |
904 | return -errno; | |
905 | ||
906 | aggr->val += count.val; | |
907 | if (scale) { | |
908 | aggr->ena += count.ena; | |
909 | aggr->run += count.run; | |
910 | } | |
911 | } | |
912 | } | |
913 | ||
c7a79c47 SE |
914 | compute_deltas(evsel, -1, aggr); |
915 | ||
c52b12ed ACM |
916 | evsel->counts->scaled = 0; |
917 | if (scale) { | |
918 | if (aggr->run == 0) { | |
919 | evsel->counts->scaled = -1; | |
920 | aggr->val = 0; | |
921 | return 0; | |
922 | } | |
923 | ||
924 | if (aggr->run < aggr->ena) { | |
925 | evsel->counts->scaled = 1; | |
926 | aggr->val = (u64)((double)aggr->val * aggr->ena / aggr->run + 0.5); | |
927 | } | |
928 | } else | |
929 | aggr->ena = aggr->run = 0; | |
930 | ||
931 | return 0; | |
932 | } | |
48290609 | 933 | |
6a4bb04c JO |
934 | static int get_group_fd(struct perf_evsel *evsel, int cpu, int thread) |
935 | { | |
936 | struct perf_evsel *leader = evsel->leader; | |
937 | int fd; | |
938 | ||
823254ed | 939 | if (perf_evsel__is_group_leader(evsel)) |
6a4bb04c JO |
940 | return -1; |
941 | ||
942 | /* | |
943 | * Leader must be already processed/open, | |
944 | * if not it's a bug. | |
945 | */ | |
946 | BUG_ON(!leader->fd); | |
947 | ||
948 | fd = FD(leader, cpu, thread); | |
949 | BUG_ON(fd == -1); | |
950 | ||
951 | return fd; | |
952 | } | |
953 | ||
e3e1a54f AH |
954 | #define __PRINT_ATTR(fmt, cast, field) \ |
955 | fprintf(fp, " %-19s "fmt"\n", #field, cast attr->field) | |
956 | ||
957 | #define PRINT_ATTR_U32(field) __PRINT_ATTR("%u" , , field) | |
958 | #define PRINT_ATTR_X32(field) __PRINT_ATTR("%#x", , field) | |
959 | #define PRINT_ATTR_U64(field) __PRINT_ATTR("%" PRIu64, (uint64_t), field) | |
960 | #define PRINT_ATTR_X64(field) __PRINT_ATTR("%#"PRIx64, (uint64_t), field) | |
961 | ||
962 | #define PRINT_ATTR2N(name1, field1, name2, field2) \ | |
963 | fprintf(fp, " %-19s %u %-19s %u\n", \ | |
964 | name1, attr->field1, name2, attr->field2) | |
965 | ||
966 | #define PRINT_ATTR2(field1, field2) \ | |
967 | PRINT_ATTR2N(#field1, field1, #field2, field2) | |
968 | ||
969 | static size_t perf_event_attr__fprintf(struct perf_event_attr *attr, FILE *fp) | |
970 | { | |
971 | size_t ret = 0; | |
972 | ||
973 | ret += fprintf(fp, "%.60s\n", graph_dotted_line); | |
974 | ret += fprintf(fp, "perf_event_attr:\n"); | |
975 | ||
976 | ret += PRINT_ATTR_U32(type); | |
977 | ret += PRINT_ATTR_U32(size); | |
978 | ret += PRINT_ATTR_X64(config); | |
979 | ret += PRINT_ATTR_U64(sample_period); | |
980 | ret += PRINT_ATTR_U64(sample_freq); | |
981 | ret += PRINT_ATTR_X64(sample_type); | |
982 | ret += PRINT_ATTR_X64(read_format); | |
983 | ||
984 | ret += PRINT_ATTR2(disabled, inherit); | |
985 | ret += PRINT_ATTR2(pinned, exclusive); | |
986 | ret += PRINT_ATTR2(exclude_user, exclude_kernel); | |
987 | ret += PRINT_ATTR2(exclude_hv, exclude_idle); | |
988 | ret += PRINT_ATTR2(mmap, comm); | |
022c50d0 | 989 | ret += PRINT_ATTR2(mmap2, comm_exec); |
e3e1a54f AH |
990 | ret += PRINT_ATTR2(freq, inherit_stat); |
991 | ret += PRINT_ATTR2(enable_on_exec, task); | |
992 | ret += PRINT_ATTR2(watermark, precise_ip); | |
993 | ret += PRINT_ATTR2(mmap_data, sample_id_all); | |
994 | ret += PRINT_ATTR2(exclude_host, exclude_guest); | |
995 | ret += PRINT_ATTR2N("excl.callchain_kern", exclude_callchain_kernel, | |
996 | "excl.callchain_user", exclude_callchain_user); | |
997 | ||
998 | ret += PRINT_ATTR_U32(wakeup_events); | |
999 | ret += PRINT_ATTR_U32(wakeup_watermark); | |
1000 | ret += PRINT_ATTR_X32(bp_type); | |
1001 | ret += PRINT_ATTR_X64(bp_addr); | |
1002 | ret += PRINT_ATTR_X64(config1); | |
1003 | ret += PRINT_ATTR_U64(bp_len); | |
1004 | ret += PRINT_ATTR_X64(config2); | |
1005 | ret += PRINT_ATTR_X64(branch_sample_type); | |
1006 | ret += PRINT_ATTR_X64(sample_regs_user); | |
1007 | ret += PRINT_ATTR_U32(sample_stack_user); | |
1008 | ||
1009 | ret += fprintf(fp, "%.60s\n", graph_dotted_line); | |
1010 | ||
1011 | return ret; | |
1012 | } | |
1013 | ||
0252208e | 1014 | static int __perf_evsel__open(struct perf_evsel *evsel, struct cpu_map *cpus, |
6a4bb04c | 1015 | struct thread_map *threads) |
48290609 | 1016 | { |
bf8e8f4b | 1017 | int cpu, thread, nthreads; |
57480d2c | 1018 | unsigned long flags = PERF_FLAG_FD_CLOEXEC; |
727ab04e | 1019 | int pid = -1, err; |
bec19672 | 1020 | enum { NO_CHANGE, SET_TO_MAX, INCREASED_MAX } set_rlimit = NO_CHANGE; |
48290609 | 1021 | |
bf8e8f4b AH |
1022 | if (evsel->system_wide) |
1023 | nthreads = 1; | |
1024 | else | |
1025 | nthreads = threads->nr; | |
1026 | ||
0252208e | 1027 | if (evsel->fd == NULL && |
bf8e8f4b | 1028 | perf_evsel__alloc_fd(evsel, cpus->nr, nthreads) < 0) |
727ab04e | 1029 | return -ENOMEM; |
4eed11d5 | 1030 | |
023695d9 | 1031 | if (evsel->cgrp) { |
57480d2c | 1032 | flags |= PERF_FLAG_PID_CGROUP; |
023695d9 SE |
1033 | pid = evsel->cgrp->fd; |
1034 | } | |
1035 | ||
594ac61a | 1036 | fallback_missing_features: |
57480d2c YD |
1037 | if (perf_missing_features.cloexec) |
1038 | flags &= ~(unsigned long)PERF_FLAG_FD_CLOEXEC; | |
5c5e854b SE |
1039 | if (perf_missing_features.mmap2) |
1040 | evsel->attr.mmap2 = 0; | |
594ac61a ACM |
1041 | if (perf_missing_features.exclude_guest) |
1042 | evsel->attr.exclude_guest = evsel->attr.exclude_host = 0; | |
1043 | retry_sample_id: | |
1044 | if (perf_missing_features.sample_id_all) | |
1045 | evsel->attr.sample_id_all = 0; | |
1046 | ||
e3e1a54f AH |
1047 | if (verbose >= 2) |
1048 | perf_event_attr__fprintf(&evsel->attr, stderr); | |
1049 | ||
86bd5e86 | 1050 | for (cpu = 0; cpu < cpus->nr; cpu++) { |
9d04f178 | 1051 | |
bf8e8f4b | 1052 | for (thread = 0; thread < nthreads; thread++) { |
6a4bb04c | 1053 | int group_fd; |
023695d9 | 1054 | |
bf8e8f4b | 1055 | if (!evsel->cgrp && !evsel->system_wide) |
023695d9 SE |
1056 | pid = threads->map[thread]; |
1057 | ||
6a4bb04c | 1058 | group_fd = get_group_fd(evsel, cpu, thread); |
bec19672 | 1059 | retry_open: |
a33f6efc | 1060 | pr_debug2("sys_perf_event_open: pid %d cpu %d group_fd %d flags %#lx\n", |
e3e1a54f AH |
1061 | pid, cpus->map[cpu], group_fd, flags); |
1062 | ||
0252208e | 1063 | FD(evsel, cpu, thread) = sys_perf_event_open(&evsel->attr, |
023695d9 | 1064 | pid, |
f08199d3 | 1065 | cpus->map[cpu], |
023695d9 | 1066 | group_fd, flags); |
727ab04e ACM |
1067 | if (FD(evsel, cpu, thread) < 0) { |
1068 | err = -errno; | |
a33f6efc | 1069 | pr_debug2("sys_perf_event_open failed, error %d\n", |
f852fd62 | 1070 | err); |
594ac61a | 1071 | goto try_fallback; |
727ab04e | 1072 | } |
bec19672 | 1073 | set_rlimit = NO_CHANGE; |
0252208e | 1074 | } |
48290609 ACM |
1075 | } |
1076 | ||
1077 | return 0; | |
1078 | ||
594ac61a | 1079 | try_fallback: |
bec19672 AK |
1080 | /* |
1081 | * perf stat needs between 5 and 22 fds per CPU. When we run out | |
1082 | * of them try to increase the limits. | |
1083 | */ | |
1084 | if (err == -EMFILE && set_rlimit < INCREASED_MAX) { | |
1085 | struct rlimit l; | |
1086 | int old_errno = errno; | |
1087 | ||
1088 | if (getrlimit(RLIMIT_NOFILE, &l) == 0) { | |
1089 | if (set_rlimit == NO_CHANGE) | |
1090 | l.rlim_cur = l.rlim_max; | |
1091 | else { | |
1092 | l.rlim_cur = l.rlim_max + 1000; | |
1093 | l.rlim_max = l.rlim_cur; | |
1094 | } | |
1095 | if (setrlimit(RLIMIT_NOFILE, &l) == 0) { | |
1096 | set_rlimit++; | |
1097 | errno = old_errno; | |
1098 | goto retry_open; | |
1099 | } | |
1100 | } | |
1101 | errno = old_errno; | |
1102 | } | |
1103 | ||
594ac61a ACM |
1104 | if (err != -EINVAL || cpu > 0 || thread > 0) |
1105 | goto out_close; | |
1106 | ||
57480d2c YD |
1107 | if (!perf_missing_features.cloexec && (flags & PERF_FLAG_FD_CLOEXEC)) { |
1108 | perf_missing_features.cloexec = true; | |
1109 | goto fallback_missing_features; | |
1110 | } else if (!perf_missing_features.mmap2 && evsel->attr.mmap2) { | |
5c5e854b SE |
1111 | perf_missing_features.mmap2 = true; |
1112 | goto fallback_missing_features; | |
1113 | } else if (!perf_missing_features.exclude_guest && | |
1114 | (evsel->attr.exclude_guest || evsel->attr.exclude_host)) { | |
594ac61a ACM |
1115 | perf_missing_features.exclude_guest = true; |
1116 | goto fallback_missing_features; | |
1117 | } else if (!perf_missing_features.sample_id_all) { | |
1118 | perf_missing_features.sample_id_all = true; | |
1119 | goto retry_sample_id; | |
1120 | } | |
1121 | ||
48290609 | 1122 | out_close: |
0252208e ACM |
1123 | do { |
1124 | while (--thread >= 0) { | |
1125 | close(FD(evsel, cpu, thread)); | |
1126 | FD(evsel, cpu, thread) = -1; | |
1127 | } | |
bf8e8f4b | 1128 | thread = nthreads; |
0252208e | 1129 | } while (--cpu >= 0); |
727ab04e ACM |
1130 | return err; |
1131 | } | |
1132 | ||
1133 | void perf_evsel__close(struct perf_evsel *evsel, int ncpus, int nthreads) | |
1134 | { | |
1135 | if (evsel->fd == NULL) | |
1136 | return; | |
1137 | ||
1138 | perf_evsel__close_fd(evsel, ncpus, nthreads); | |
1139 | perf_evsel__free_fd(evsel); | |
48290609 ACM |
1140 | } |
1141 | ||
0252208e ACM |
1142 | static struct { |
1143 | struct cpu_map map; | |
1144 | int cpus[1]; | |
1145 | } empty_cpu_map = { | |
1146 | .map.nr = 1, | |
1147 | .cpus = { -1, }, | |
1148 | }; | |
1149 | ||
1150 | static struct { | |
1151 | struct thread_map map; | |
1152 | int threads[1]; | |
1153 | } empty_thread_map = { | |
1154 | .map.nr = 1, | |
1155 | .threads = { -1, }, | |
1156 | }; | |
1157 | ||
f08199d3 | 1158 | int perf_evsel__open(struct perf_evsel *evsel, struct cpu_map *cpus, |
6a4bb04c | 1159 | struct thread_map *threads) |
48290609 | 1160 | { |
0252208e ACM |
1161 | if (cpus == NULL) { |
1162 | /* Work around old compiler warnings about strict aliasing */ | |
1163 | cpus = &empty_cpu_map.map; | |
48290609 ACM |
1164 | } |
1165 | ||
0252208e ACM |
1166 | if (threads == NULL) |
1167 | threads = &empty_thread_map.map; | |
48290609 | 1168 | |
6a4bb04c | 1169 | return __perf_evsel__open(evsel, cpus, threads); |
48290609 ACM |
1170 | } |
1171 | ||
f08199d3 | 1172 | int perf_evsel__open_per_cpu(struct perf_evsel *evsel, |
6a4bb04c | 1173 | struct cpu_map *cpus) |
48290609 | 1174 | { |
6a4bb04c | 1175 | return __perf_evsel__open(evsel, cpus, &empty_thread_map.map); |
0252208e | 1176 | } |
48290609 | 1177 | |
f08199d3 | 1178 | int perf_evsel__open_per_thread(struct perf_evsel *evsel, |
6a4bb04c | 1179 | struct thread_map *threads) |
0252208e | 1180 | { |
6a4bb04c | 1181 | return __perf_evsel__open(evsel, &empty_cpu_map.map, threads); |
48290609 | 1182 | } |
70082dd9 | 1183 | |
0807d2d8 ACM |
1184 | static int perf_evsel__parse_id_sample(const struct perf_evsel *evsel, |
1185 | const union perf_event *event, | |
1186 | struct perf_sample *sample) | |
d0dd74e8 | 1187 | { |
0807d2d8 | 1188 | u64 type = evsel->attr.sample_type; |
d0dd74e8 | 1189 | const u64 *array = event->sample.array; |
0807d2d8 | 1190 | bool swapped = evsel->needs_swap; |
37073f9e | 1191 | union u64_swap u; |
d0dd74e8 ACM |
1192 | |
1193 | array += ((event->header.size - | |
1194 | sizeof(event->header)) / sizeof(u64)) - 1; | |
1195 | ||
75562573 AH |
1196 | if (type & PERF_SAMPLE_IDENTIFIER) { |
1197 | sample->id = *array; | |
1198 | array--; | |
1199 | } | |
1200 | ||
d0dd74e8 | 1201 | if (type & PERF_SAMPLE_CPU) { |
37073f9e JO |
1202 | u.val64 = *array; |
1203 | if (swapped) { | |
1204 | /* undo swap of u64, then swap on individual u32s */ | |
1205 | u.val64 = bswap_64(u.val64); | |
1206 | u.val32[0] = bswap_32(u.val32[0]); | |
1207 | } | |
1208 | ||
1209 | sample->cpu = u.val32[0]; | |
d0dd74e8 ACM |
1210 | array--; |
1211 | } | |
1212 | ||
1213 | if (type & PERF_SAMPLE_STREAM_ID) { | |
1214 | sample->stream_id = *array; | |
1215 | array--; | |
1216 | } | |
1217 | ||
1218 | if (type & PERF_SAMPLE_ID) { | |
1219 | sample->id = *array; | |
1220 | array--; | |
1221 | } | |
1222 | ||
1223 | if (type & PERF_SAMPLE_TIME) { | |
1224 | sample->time = *array; | |
1225 | array--; | |
1226 | } | |
1227 | ||
1228 | if (type & PERF_SAMPLE_TID) { | |
37073f9e JO |
1229 | u.val64 = *array; |
1230 | if (swapped) { | |
1231 | /* undo swap of u64, then swap on individual u32s */ | |
1232 | u.val64 = bswap_64(u.val64); | |
1233 | u.val32[0] = bswap_32(u.val32[0]); | |
1234 | u.val32[1] = bswap_32(u.val32[1]); | |
1235 | } | |
1236 | ||
1237 | sample->pid = u.val32[0]; | |
1238 | sample->tid = u.val32[1]; | |
dd44bc6b | 1239 | array--; |
d0dd74e8 ACM |
1240 | } |
1241 | ||
1242 | return 0; | |
1243 | } | |
1244 | ||
03b6ea9b AH |
1245 | static inline bool overflow(const void *endp, u16 max_size, const void *offset, |
1246 | u64 size) | |
98e1da90 | 1247 | { |
03b6ea9b AH |
1248 | return size > max_size || offset + size > endp; |
1249 | } | |
98e1da90 | 1250 | |
03b6ea9b AH |
1251 | #define OVERFLOW_CHECK(offset, size, max_size) \ |
1252 | do { \ | |
1253 | if (overflow(endp, (max_size), (offset), (size))) \ | |
1254 | return -EFAULT; \ | |
1255 | } while (0) | |
98e1da90 | 1256 | |
03b6ea9b AH |
1257 | #define OVERFLOW_CHECK_u64(offset) \ |
1258 | OVERFLOW_CHECK(offset, sizeof(u64), sizeof(u64)) | |
98e1da90 | 1259 | |
a3f698fe | 1260 | int perf_evsel__parse_sample(struct perf_evsel *evsel, union perf_event *event, |
0807d2d8 | 1261 | struct perf_sample *data) |
d0dd74e8 | 1262 | { |
a3f698fe | 1263 | u64 type = evsel->attr.sample_type; |
0807d2d8 | 1264 | bool swapped = evsel->needs_swap; |
d0dd74e8 | 1265 | const u64 *array; |
03b6ea9b AH |
1266 | u16 max_size = event->header.size; |
1267 | const void *endp = (void *)event + max_size; | |
1268 | u64 sz; | |
d0dd74e8 | 1269 | |
936be503 DA |
1270 | /* |
1271 | * used for cross-endian analysis. See git commit 65014ab3 | |
1272 | * for why this goofiness is needed. | |
1273 | */ | |
6a11f92e | 1274 | union u64_swap u; |
936be503 | 1275 | |
f3bda2c9 | 1276 | memset(data, 0, sizeof(*data)); |
d0dd74e8 ACM |
1277 | data->cpu = data->pid = data->tid = -1; |
1278 | data->stream_id = data->id = data->time = -1ULL; | |
bc529086 | 1279 | data->period = evsel->attr.sample_period; |
05484298 | 1280 | data->weight = 0; |
d0dd74e8 ACM |
1281 | |
1282 | if (event->header.type != PERF_RECORD_SAMPLE) { | |
a3f698fe | 1283 | if (!evsel->attr.sample_id_all) |
d0dd74e8 | 1284 | return 0; |
0807d2d8 | 1285 | return perf_evsel__parse_id_sample(evsel, event, data); |
d0dd74e8 ACM |
1286 | } |
1287 | ||
1288 | array = event->sample.array; | |
1289 | ||
03b6ea9b AH |
1290 | /* |
1291 | * The evsel's sample_size is based on PERF_SAMPLE_MASK which includes | |
1292 | * up to PERF_SAMPLE_PERIOD. After that overflow() must be used to | |
1293 | * check the format does not go past the end of the event. | |
1294 | */ | |
a3f698fe | 1295 | if (evsel->sample_size + sizeof(event->header) > event->header.size) |
a2854124 FW |
1296 | return -EFAULT; |
1297 | ||
75562573 AH |
1298 | data->id = -1ULL; |
1299 | if (type & PERF_SAMPLE_IDENTIFIER) { | |
1300 | data->id = *array; | |
1301 | array++; | |
1302 | } | |
1303 | ||
d0dd74e8 | 1304 | if (type & PERF_SAMPLE_IP) { |
ef89325f | 1305 | data->ip = *array; |
d0dd74e8 ACM |
1306 | array++; |
1307 | } | |
1308 | ||
1309 | if (type & PERF_SAMPLE_TID) { | |
936be503 DA |
1310 | u.val64 = *array; |
1311 | if (swapped) { | |
1312 | /* undo swap of u64, then swap on individual u32s */ | |
1313 | u.val64 = bswap_64(u.val64); | |
1314 | u.val32[0] = bswap_32(u.val32[0]); | |
1315 | u.val32[1] = bswap_32(u.val32[1]); | |
1316 | } | |
1317 | ||
1318 | data->pid = u.val32[0]; | |
1319 | data->tid = u.val32[1]; | |
d0dd74e8 ACM |
1320 | array++; |
1321 | } | |
1322 | ||
1323 | if (type & PERF_SAMPLE_TIME) { | |
1324 | data->time = *array; | |
1325 | array++; | |
1326 | } | |
1327 | ||
7cec0922 | 1328 | data->addr = 0; |
d0dd74e8 ACM |
1329 | if (type & PERF_SAMPLE_ADDR) { |
1330 | data->addr = *array; | |
1331 | array++; | |
1332 | } | |
1333 | ||
d0dd74e8 ACM |
1334 | if (type & PERF_SAMPLE_ID) { |
1335 | data->id = *array; | |
1336 | array++; | |
1337 | } | |
1338 | ||
1339 | if (type & PERF_SAMPLE_STREAM_ID) { | |
1340 | data->stream_id = *array; | |
1341 | array++; | |
1342 | } | |
1343 | ||
1344 | if (type & PERF_SAMPLE_CPU) { | |
936be503 DA |
1345 | |
1346 | u.val64 = *array; | |
1347 | if (swapped) { | |
1348 | /* undo swap of u64, then swap on individual u32s */ | |
1349 | u.val64 = bswap_64(u.val64); | |
1350 | u.val32[0] = bswap_32(u.val32[0]); | |
1351 | } | |
1352 | ||
1353 | data->cpu = u.val32[0]; | |
d0dd74e8 ACM |
1354 | array++; |
1355 | } | |
1356 | ||
1357 | if (type & PERF_SAMPLE_PERIOD) { | |
1358 | data->period = *array; | |
1359 | array++; | |
1360 | } | |
1361 | ||
1362 | if (type & PERF_SAMPLE_READ) { | |
9ede473c JO |
1363 | u64 read_format = evsel->attr.read_format; |
1364 | ||
03b6ea9b | 1365 | OVERFLOW_CHECK_u64(array); |
9ede473c JO |
1366 | if (read_format & PERF_FORMAT_GROUP) |
1367 | data->read.group.nr = *array; | |
1368 | else | |
1369 | data->read.one.value = *array; | |
1370 | ||
1371 | array++; | |
1372 | ||
1373 | if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED) { | |
03b6ea9b | 1374 | OVERFLOW_CHECK_u64(array); |
9ede473c JO |
1375 | data->read.time_enabled = *array; |
1376 | array++; | |
1377 | } | |
1378 | ||
1379 | if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING) { | |
03b6ea9b | 1380 | OVERFLOW_CHECK_u64(array); |
9ede473c JO |
1381 | data->read.time_running = *array; |
1382 | array++; | |
1383 | } | |
1384 | ||
1385 | /* PERF_FORMAT_ID is forced for PERF_SAMPLE_READ */ | |
1386 | if (read_format & PERF_FORMAT_GROUP) { | |
03b6ea9b AH |
1387 | const u64 max_group_nr = UINT64_MAX / |
1388 | sizeof(struct sample_read_value); | |
1389 | ||
1390 | if (data->read.group.nr > max_group_nr) | |
1391 | return -EFAULT; | |
1392 | sz = data->read.group.nr * | |
1393 | sizeof(struct sample_read_value); | |
1394 | OVERFLOW_CHECK(array, sz, max_size); | |
1395 | data->read.group.values = | |
1396 | (struct sample_read_value *)array; | |
1397 | array = (void *)array + sz; | |
9ede473c | 1398 | } else { |
03b6ea9b | 1399 | OVERFLOW_CHECK_u64(array); |
9ede473c JO |
1400 | data->read.one.id = *array; |
1401 | array++; | |
1402 | } | |
d0dd74e8 ACM |
1403 | } |
1404 | ||
1405 | if (type & PERF_SAMPLE_CALLCHAIN) { | |
03b6ea9b | 1406 | const u64 max_callchain_nr = UINT64_MAX / sizeof(u64); |
98e1da90 | 1407 | |
03b6ea9b AH |
1408 | OVERFLOW_CHECK_u64(array); |
1409 | data->callchain = (struct ip_callchain *)array++; | |
1410 | if (data->callchain->nr > max_callchain_nr) | |
98e1da90 | 1411 | return -EFAULT; |
03b6ea9b AH |
1412 | sz = data->callchain->nr * sizeof(u64); |
1413 | OVERFLOW_CHECK(array, sz, max_size); | |
1414 | array = (void *)array + sz; | |
d0dd74e8 ACM |
1415 | } |
1416 | ||
1417 | if (type & PERF_SAMPLE_RAW) { | |
03b6ea9b | 1418 | OVERFLOW_CHECK_u64(array); |
936be503 DA |
1419 | u.val64 = *array; |
1420 | if (WARN_ONCE(swapped, | |
1421 | "Endianness of raw data not corrected!\n")) { | |
1422 | /* undo swap of u64, then swap on individual u32s */ | |
1423 | u.val64 = bswap_64(u.val64); | |
1424 | u.val32[0] = bswap_32(u.val32[0]); | |
1425 | u.val32[1] = bswap_32(u.val32[1]); | |
1426 | } | |
936be503 | 1427 | data->raw_size = u.val32[0]; |
03b6ea9b | 1428 | array = (void *)array + sizeof(u32); |
98e1da90 | 1429 | |
03b6ea9b AH |
1430 | OVERFLOW_CHECK(array, data->raw_size, max_size); |
1431 | data->raw_data = (void *)array; | |
1432 | array = (void *)array + data->raw_size; | |
d0dd74e8 ACM |
1433 | } |
1434 | ||
b5387528 | 1435 | if (type & PERF_SAMPLE_BRANCH_STACK) { |
03b6ea9b AH |
1436 | const u64 max_branch_nr = UINT64_MAX / |
1437 | sizeof(struct branch_entry); | |
b5387528 | 1438 | |
03b6ea9b AH |
1439 | OVERFLOW_CHECK_u64(array); |
1440 | data->branch_stack = (struct branch_stack *)array++; | |
b5387528 | 1441 | |
03b6ea9b AH |
1442 | if (data->branch_stack->nr > max_branch_nr) |
1443 | return -EFAULT; | |
b5387528 | 1444 | sz = data->branch_stack->nr * sizeof(struct branch_entry); |
03b6ea9b AH |
1445 | OVERFLOW_CHECK(array, sz, max_size); |
1446 | array = (void *)array + sz; | |
b5387528 | 1447 | } |
0f6a3015 JO |
1448 | |
1449 | if (type & PERF_SAMPLE_REGS_USER) { | |
03b6ea9b | 1450 | OVERFLOW_CHECK_u64(array); |
5b95a4a3 AH |
1451 | data->user_regs.abi = *array; |
1452 | array++; | |
0f6a3015 | 1453 | |
5b95a4a3 | 1454 | if (data->user_regs.abi) { |
352ea45a | 1455 | u64 mask = evsel->attr.sample_regs_user; |
03b6ea9b | 1456 | |
352ea45a | 1457 | sz = hweight_long(mask) * sizeof(u64); |
03b6ea9b | 1458 | OVERFLOW_CHECK(array, sz, max_size); |
352ea45a | 1459 | data->user_regs.mask = mask; |
0f6a3015 | 1460 | data->user_regs.regs = (u64 *)array; |
03b6ea9b | 1461 | array = (void *)array + sz; |
0f6a3015 JO |
1462 | } |
1463 | } | |
1464 | ||
1465 | if (type & PERF_SAMPLE_STACK_USER) { | |
03b6ea9b AH |
1466 | OVERFLOW_CHECK_u64(array); |
1467 | sz = *array++; | |
0f6a3015 JO |
1468 | |
1469 | data->user_stack.offset = ((char *)(array - 1) | |
1470 | - (char *) event); | |
1471 | ||
03b6ea9b | 1472 | if (!sz) { |
0f6a3015 JO |
1473 | data->user_stack.size = 0; |
1474 | } else { | |
03b6ea9b | 1475 | OVERFLOW_CHECK(array, sz, max_size); |
0f6a3015 | 1476 | data->user_stack.data = (char *)array; |
03b6ea9b AH |
1477 | array = (void *)array + sz; |
1478 | OVERFLOW_CHECK_u64(array); | |
54bd2692 | 1479 | data->user_stack.size = *array++; |
a65cb4b9 JO |
1480 | if (WARN_ONCE(data->user_stack.size > sz, |
1481 | "user stack dump failure\n")) | |
1482 | return -EFAULT; | |
0f6a3015 JO |
1483 | } |
1484 | } | |
1485 | ||
05484298 AK |
1486 | data->weight = 0; |
1487 | if (type & PERF_SAMPLE_WEIGHT) { | |
03b6ea9b | 1488 | OVERFLOW_CHECK_u64(array); |
05484298 AK |
1489 | data->weight = *array; |
1490 | array++; | |
1491 | } | |
1492 | ||
98a3b32c SE |
1493 | data->data_src = PERF_MEM_DATA_SRC_NONE; |
1494 | if (type & PERF_SAMPLE_DATA_SRC) { | |
03b6ea9b | 1495 | OVERFLOW_CHECK_u64(array); |
98a3b32c SE |
1496 | data->data_src = *array; |
1497 | array++; | |
1498 | } | |
1499 | ||
475eeab9 AK |
1500 | data->transaction = 0; |
1501 | if (type & PERF_SAMPLE_TRANSACTION) { | |
87b95524 | 1502 | OVERFLOW_CHECK_u64(array); |
475eeab9 AK |
1503 | data->transaction = *array; |
1504 | array++; | |
1505 | } | |
1506 | ||
d0dd74e8 ACM |
1507 | return 0; |
1508 | } | |
74eec26f | 1509 | |
b1cf6f65 | 1510 | size_t perf_event__sample_event_size(const struct perf_sample *sample, u64 type, |
352ea45a | 1511 | u64 read_format) |
b1cf6f65 AH |
1512 | { |
1513 | size_t sz, result = sizeof(struct sample_event); | |
1514 | ||
1515 | if (type & PERF_SAMPLE_IDENTIFIER) | |
1516 | result += sizeof(u64); | |
1517 | ||
1518 | if (type & PERF_SAMPLE_IP) | |
1519 | result += sizeof(u64); | |
1520 | ||
1521 | if (type & PERF_SAMPLE_TID) | |
1522 | result += sizeof(u64); | |
1523 | ||
1524 | if (type & PERF_SAMPLE_TIME) | |
1525 | result += sizeof(u64); | |
1526 | ||
1527 | if (type & PERF_SAMPLE_ADDR) | |
1528 | result += sizeof(u64); | |
1529 | ||
1530 | if (type & PERF_SAMPLE_ID) | |
1531 | result += sizeof(u64); | |
1532 | ||
1533 | if (type & PERF_SAMPLE_STREAM_ID) | |
1534 | result += sizeof(u64); | |
1535 | ||
1536 | if (type & PERF_SAMPLE_CPU) | |
1537 | result += sizeof(u64); | |
1538 | ||
1539 | if (type & PERF_SAMPLE_PERIOD) | |
1540 | result += sizeof(u64); | |
1541 | ||
1542 | if (type & PERF_SAMPLE_READ) { | |
1543 | result += sizeof(u64); | |
1544 | if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED) | |
1545 | result += sizeof(u64); | |
1546 | if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING) | |
1547 | result += sizeof(u64); | |
1548 | /* PERF_FORMAT_ID is forced for PERF_SAMPLE_READ */ | |
1549 | if (read_format & PERF_FORMAT_GROUP) { | |
1550 | sz = sample->read.group.nr * | |
1551 | sizeof(struct sample_read_value); | |
1552 | result += sz; | |
1553 | } else { | |
1554 | result += sizeof(u64); | |
1555 | } | |
1556 | } | |
1557 | ||
1558 | if (type & PERF_SAMPLE_CALLCHAIN) { | |
1559 | sz = (sample->callchain->nr + 1) * sizeof(u64); | |
1560 | result += sz; | |
1561 | } | |
1562 | ||
1563 | if (type & PERF_SAMPLE_RAW) { | |
1564 | result += sizeof(u32); | |
1565 | result += sample->raw_size; | |
1566 | } | |
1567 | ||
1568 | if (type & PERF_SAMPLE_BRANCH_STACK) { | |
1569 | sz = sample->branch_stack->nr * sizeof(struct branch_entry); | |
1570 | sz += sizeof(u64); | |
1571 | result += sz; | |
1572 | } | |
1573 | ||
1574 | if (type & PERF_SAMPLE_REGS_USER) { | |
1575 | if (sample->user_regs.abi) { | |
1576 | result += sizeof(u64); | |
352ea45a | 1577 | sz = hweight_long(sample->user_regs.mask) * sizeof(u64); |
b1cf6f65 AH |
1578 | result += sz; |
1579 | } else { | |
1580 | result += sizeof(u64); | |
1581 | } | |
1582 | } | |
1583 | ||
1584 | if (type & PERF_SAMPLE_STACK_USER) { | |
1585 | sz = sample->user_stack.size; | |
1586 | result += sizeof(u64); | |
1587 | if (sz) { | |
1588 | result += sz; | |
1589 | result += sizeof(u64); | |
1590 | } | |
1591 | } | |
1592 | ||
1593 | if (type & PERF_SAMPLE_WEIGHT) | |
1594 | result += sizeof(u64); | |
1595 | ||
1596 | if (type & PERF_SAMPLE_DATA_SRC) | |
1597 | result += sizeof(u64); | |
1598 | ||
42d88910 AH |
1599 | if (type & PERF_SAMPLE_TRANSACTION) |
1600 | result += sizeof(u64); | |
1601 | ||
b1cf6f65 AH |
1602 | return result; |
1603 | } | |
1604 | ||
74eec26f | 1605 | int perf_event__synthesize_sample(union perf_event *event, u64 type, |
352ea45a | 1606 | u64 read_format, |
74eec26f AV |
1607 | const struct perf_sample *sample, |
1608 | bool swapped) | |
1609 | { | |
1610 | u64 *array; | |
d03f2170 | 1611 | size_t sz; |
74eec26f AV |
1612 | /* |
1613 | * used for cross-endian analysis. See git commit 65014ab3 | |
1614 | * for why this goofiness is needed. | |
1615 | */ | |
6a11f92e | 1616 | union u64_swap u; |
74eec26f AV |
1617 | |
1618 | array = event->sample.array; | |
1619 | ||
75562573 AH |
1620 | if (type & PERF_SAMPLE_IDENTIFIER) { |
1621 | *array = sample->id; | |
1622 | array++; | |
1623 | } | |
1624 | ||
74eec26f | 1625 | if (type & PERF_SAMPLE_IP) { |
ef89325f | 1626 | *array = sample->ip; |
74eec26f AV |
1627 | array++; |
1628 | } | |
1629 | ||
1630 | if (type & PERF_SAMPLE_TID) { | |
1631 | u.val32[0] = sample->pid; | |
1632 | u.val32[1] = sample->tid; | |
1633 | if (swapped) { | |
1634 | /* | |
a3f698fe | 1635 | * Inverse of what is done in perf_evsel__parse_sample |
74eec26f AV |
1636 | */ |
1637 | u.val32[0] = bswap_32(u.val32[0]); | |
1638 | u.val32[1] = bswap_32(u.val32[1]); | |
1639 | u.val64 = bswap_64(u.val64); | |
1640 | } | |
1641 | ||
1642 | *array = u.val64; | |
1643 | array++; | |
1644 | } | |
1645 | ||
1646 | if (type & PERF_SAMPLE_TIME) { | |
1647 | *array = sample->time; | |
1648 | array++; | |
1649 | } | |
1650 | ||
1651 | if (type & PERF_SAMPLE_ADDR) { | |
1652 | *array = sample->addr; | |
1653 | array++; | |
1654 | } | |
1655 | ||
1656 | if (type & PERF_SAMPLE_ID) { | |
1657 | *array = sample->id; | |
1658 | array++; | |
1659 | } | |
1660 | ||
1661 | if (type & PERF_SAMPLE_STREAM_ID) { | |
1662 | *array = sample->stream_id; | |
1663 | array++; | |
1664 | } | |
1665 | ||
1666 | if (type & PERF_SAMPLE_CPU) { | |
1667 | u.val32[0] = sample->cpu; | |
1668 | if (swapped) { | |
1669 | /* | |
a3f698fe | 1670 | * Inverse of what is done in perf_evsel__parse_sample |
74eec26f AV |
1671 | */ |
1672 | u.val32[0] = bswap_32(u.val32[0]); | |
1673 | u.val64 = bswap_64(u.val64); | |
1674 | } | |
1675 | *array = u.val64; | |
1676 | array++; | |
1677 | } | |
1678 | ||
1679 | if (type & PERF_SAMPLE_PERIOD) { | |
1680 | *array = sample->period; | |
1681 | array++; | |
1682 | } | |
1683 | ||
d03f2170 AH |
1684 | if (type & PERF_SAMPLE_READ) { |
1685 | if (read_format & PERF_FORMAT_GROUP) | |
1686 | *array = sample->read.group.nr; | |
1687 | else | |
1688 | *array = sample->read.one.value; | |
1689 | array++; | |
1690 | ||
1691 | if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED) { | |
1692 | *array = sample->read.time_enabled; | |
1693 | array++; | |
1694 | } | |
1695 | ||
1696 | if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING) { | |
1697 | *array = sample->read.time_running; | |
1698 | array++; | |
1699 | } | |
1700 | ||
1701 | /* PERF_FORMAT_ID is forced for PERF_SAMPLE_READ */ | |
1702 | if (read_format & PERF_FORMAT_GROUP) { | |
1703 | sz = sample->read.group.nr * | |
1704 | sizeof(struct sample_read_value); | |
1705 | memcpy(array, sample->read.group.values, sz); | |
1706 | array = (void *)array + sz; | |
1707 | } else { | |
1708 | *array = sample->read.one.id; | |
1709 | array++; | |
1710 | } | |
1711 | } | |
1712 | ||
1713 | if (type & PERF_SAMPLE_CALLCHAIN) { | |
1714 | sz = (sample->callchain->nr + 1) * sizeof(u64); | |
1715 | memcpy(array, sample->callchain, sz); | |
1716 | array = (void *)array + sz; | |
1717 | } | |
1718 | ||
1719 | if (type & PERF_SAMPLE_RAW) { | |
1720 | u.val32[0] = sample->raw_size; | |
1721 | if (WARN_ONCE(swapped, | |
1722 | "Endianness of raw data not corrected!\n")) { | |
1723 | /* | |
1724 | * Inverse of what is done in perf_evsel__parse_sample | |
1725 | */ | |
1726 | u.val32[0] = bswap_32(u.val32[0]); | |
1727 | u.val32[1] = bswap_32(u.val32[1]); | |
1728 | u.val64 = bswap_64(u.val64); | |
1729 | } | |
1730 | *array = u.val64; | |
1731 | array = (void *)array + sizeof(u32); | |
1732 | ||
1733 | memcpy(array, sample->raw_data, sample->raw_size); | |
1734 | array = (void *)array + sample->raw_size; | |
1735 | } | |
1736 | ||
1737 | if (type & PERF_SAMPLE_BRANCH_STACK) { | |
1738 | sz = sample->branch_stack->nr * sizeof(struct branch_entry); | |
1739 | sz += sizeof(u64); | |
1740 | memcpy(array, sample->branch_stack, sz); | |
1741 | array = (void *)array + sz; | |
1742 | } | |
1743 | ||
1744 | if (type & PERF_SAMPLE_REGS_USER) { | |
1745 | if (sample->user_regs.abi) { | |
1746 | *array++ = sample->user_regs.abi; | |
352ea45a | 1747 | sz = hweight_long(sample->user_regs.mask) * sizeof(u64); |
d03f2170 AH |
1748 | memcpy(array, sample->user_regs.regs, sz); |
1749 | array = (void *)array + sz; | |
1750 | } else { | |
1751 | *array++ = 0; | |
1752 | } | |
1753 | } | |
1754 | ||
1755 | if (type & PERF_SAMPLE_STACK_USER) { | |
1756 | sz = sample->user_stack.size; | |
1757 | *array++ = sz; | |
1758 | if (sz) { | |
1759 | memcpy(array, sample->user_stack.data, sz); | |
1760 | array = (void *)array + sz; | |
1761 | *array++ = sz; | |
1762 | } | |
1763 | } | |
1764 | ||
1765 | if (type & PERF_SAMPLE_WEIGHT) { | |
1766 | *array = sample->weight; | |
1767 | array++; | |
1768 | } | |
1769 | ||
1770 | if (type & PERF_SAMPLE_DATA_SRC) { | |
1771 | *array = sample->data_src; | |
1772 | array++; | |
1773 | } | |
1774 | ||
42d88910 AH |
1775 | if (type & PERF_SAMPLE_TRANSACTION) { |
1776 | *array = sample->transaction; | |
1777 | array++; | |
1778 | } | |
1779 | ||
74eec26f AV |
1780 | return 0; |
1781 | } | |
5555ded4 | 1782 | |
efd2b924 ACM |
1783 | struct format_field *perf_evsel__field(struct perf_evsel *evsel, const char *name) |
1784 | { | |
1785 | return pevent_find_field(evsel->tp_format, name); | |
1786 | } | |
1787 | ||
5d2074ea | 1788 | void *perf_evsel__rawptr(struct perf_evsel *evsel, struct perf_sample *sample, |
5555ded4 ACM |
1789 | const char *name) |
1790 | { | |
efd2b924 | 1791 | struct format_field *field = perf_evsel__field(evsel, name); |
5555ded4 ACM |
1792 | int offset; |
1793 | ||
efd2b924 ACM |
1794 | if (!field) |
1795 | return NULL; | |
5555ded4 ACM |
1796 | |
1797 | offset = field->offset; | |
1798 | ||
1799 | if (field->flags & FIELD_IS_DYNAMIC) { | |
1800 | offset = *(int *)(sample->raw_data + field->offset); | |
1801 | offset &= 0xffff; | |
1802 | } | |
1803 | ||
1804 | return sample->raw_data + offset; | |
1805 | } | |
1806 | ||
1807 | u64 perf_evsel__intval(struct perf_evsel *evsel, struct perf_sample *sample, | |
1808 | const char *name) | |
1809 | { | |
efd2b924 | 1810 | struct format_field *field = perf_evsel__field(evsel, name); |
e6b6f679 ACM |
1811 | void *ptr; |
1812 | u64 value; | |
5555ded4 | 1813 | |
efd2b924 ACM |
1814 | if (!field) |
1815 | return 0; | |
5555ded4 | 1816 | |
e6b6f679 | 1817 | ptr = sample->raw_data + field->offset; |
5555ded4 | 1818 | |
e6b6f679 ACM |
1819 | switch (field->size) { |
1820 | case 1: | |
1821 | return *(u8 *)ptr; | |
1822 | case 2: | |
1823 | value = *(u16 *)ptr; | |
1824 | break; | |
1825 | case 4: | |
1826 | value = *(u32 *)ptr; | |
1827 | break; | |
1828 | case 8: | |
1829 | value = *(u64 *)ptr; | |
1830 | break; | |
1831 | default: | |
1832 | return 0; | |
1833 | } | |
1834 | ||
1835 | if (!evsel->needs_swap) | |
1836 | return value; | |
1837 | ||
1838 | switch (field->size) { | |
1839 | case 2: | |
1840 | return bswap_16(value); | |
1841 | case 4: | |
1842 | return bswap_32(value); | |
1843 | case 8: | |
1844 | return bswap_64(value); | |
1845 | default: | |
1846 | return 0; | |
1847 | } | |
1848 | ||
1849 | return 0; | |
5555ded4 | 1850 | } |
0698aedd ACM |
1851 | |
1852 | static int comma_fprintf(FILE *fp, bool *first, const char *fmt, ...) | |
1853 | { | |
1854 | va_list args; | |
1855 | int ret = 0; | |
1856 | ||
1857 | if (!*first) { | |
1858 | ret += fprintf(fp, ","); | |
1859 | } else { | |
1860 | ret += fprintf(fp, ":"); | |
1861 | *first = false; | |
1862 | } | |
1863 | ||
1864 | va_start(args, fmt); | |
1865 | ret += vfprintf(fp, fmt, args); | |
1866 | va_end(args); | |
1867 | return ret; | |
1868 | } | |
1869 | ||
1870 | static int __if_fprintf(FILE *fp, bool *first, const char *field, u64 value) | |
1871 | { | |
1872 | if (value == 0) | |
1873 | return 0; | |
1874 | ||
1875 | return comma_fprintf(fp, first, " %s: %" PRIu64, field, value); | |
1876 | } | |
1877 | ||
1878 | #define if_print(field) printed += __if_fprintf(fp, &first, #field, evsel->attr.field) | |
1879 | ||
c79a4393 ACM |
1880 | struct bit_names { |
1881 | int bit; | |
1882 | const char *name; | |
1883 | }; | |
1884 | ||
1885 | static int bits__fprintf(FILE *fp, const char *field, u64 value, | |
1886 | struct bit_names *bits, bool *first) | |
1887 | { | |
1888 | int i = 0, printed = comma_fprintf(fp, first, " %s: ", field); | |
1889 | bool first_bit = true; | |
1890 | ||
1891 | do { | |
1892 | if (value & bits[i].bit) { | |
1893 | printed += fprintf(fp, "%s%s", first_bit ? "" : "|", bits[i].name); | |
1894 | first_bit = false; | |
1895 | } | |
1896 | } while (bits[++i].name != NULL); | |
1897 | ||
1898 | return printed; | |
1899 | } | |
1900 | ||
1901 | static int sample_type__fprintf(FILE *fp, bool *first, u64 value) | |
1902 | { | |
1903 | #define bit_name(n) { PERF_SAMPLE_##n, #n } | |
1904 | struct bit_names bits[] = { | |
1905 | bit_name(IP), bit_name(TID), bit_name(TIME), bit_name(ADDR), | |
1906 | bit_name(READ), bit_name(CALLCHAIN), bit_name(ID), bit_name(CPU), | |
1907 | bit_name(PERIOD), bit_name(STREAM_ID), bit_name(RAW), | |
1908 | bit_name(BRANCH_STACK), bit_name(REGS_USER), bit_name(STACK_USER), | |
75562573 | 1909 | bit_name(IDENTIFIER), |
c79a4393 ACM |
1910 | { .name = NULL, } |
1911 | }; | |
1912 | #undef bit_name | |
1913 | return bits__fprintf(fp, "sample_type", value, bits, first); | |
1914 | } | |
1915 | ||
1916 | static int read_format__fprintf(FILE *fp, bool *first, u64 value) | |
1917 | { | |
1918 | #define bit_name(n) { PERF_FORMAT_##n, #n } | |
1919 | struct bit_names bits[] = { | |
1920 | bit_name(TOTAL_TIME_ENABLED), bit_name(TOTAL_TIME_RUNNING), | |
1921 | bit_name(ID), bit_name(GROUP), | |
1922 | { .name = NULL, } | |
1923 | }; | |
1924 | #undef bit_name | |
1925 | return bits__fprintf(fp, "read_format", value, bits, first); | |
1926 | } | |
1927 | ||
0698aedd ACM |
1928 | int perf_evsel__fprintf(struct perf_evsel *evsel, |
1929 | struct perf_attr_details *details, FILE *fp) | |
1930 | { | |
1931 | bool first = true; | |
e6ab07d0 NK |
1932 | int printed = 0; |
1933 | ||
e35ef355 | 1934 | if (details->event_group) { |
e6ab07d0 NK |
1935 | struct perf_evsel *pos; |
1936 | ||
1937 | if (!perf_evsel__is_group_leader(evsel)) | |
1938 | return 0; | |
1939 | ||
1940 | if (evsel->nr_members > 1) | |
1941 | printed += fprintf(fp, "%s{", evsel->group_name ?: ""); | |
1942 | ||
1943 | printed += fprintf(fp, "%s", perf_evsel__name(evsel)); | |
1944 | for_each_group_member(pos, evsel) | |
1945 | printed += fprintf(fp, ",%s", perf_evsel__name(pos)); | |
1946 | ||
1947 | if (evsel->nr_members > 1) | |
1948 | printed += fprintf(fp, "}"); | |
1949 | goto out; | |
1950 | } | |
1951 | ||
1952 | printed += fprintf(fp, "%s", perf_evsel__name(evsel)); | |
0698aedd ACM |
1953 | |
1954 | if (details->verbose || details->freq) { | |
1955 | printed += comma_fprintf(fp, &first, " sample_freq=%" PRIu64, | |
1956 | (u64)evsel->attr.sample_freq); | |
1957 | } | |
1958 | ||
1959 | if (details->verbose) { | |
1960 | if_print(type); | |
1961 | if_print(config); | |
1962 | if_print(config1); | |
1963 | if_print(config2); | |
1964 | if_print(size); | |
c79a4393 ACM |
1965 | printed += sample_type__fprintf(fp, &first, evsel->attr.sample_type); |
1966 | if (evsel->attr.read_format) | |
1967 | printed += read_format__fprintf(fp, &first, evsel->attr.read_format); | |
0698aedd ACM |
1968 | if_print(disabled); |
1969 | if_print(inherit); | |
1970 | if_print(pinned); | |
1971 | if_print(exclusive); | |
1972 | if_print(exclude_user); | |
1973 | if_print(exclude_kernel); | |
1974 | if_print(exclude_hv); | |
1975 | if_print(exclude_idle); | |
1976 | if_print(mmap); | |
5c5e854b | 1977 | if_print(mmap2); |
0698aedd | 1978 | if_print(comm); |
022c50d0 | 1979 | if_print(comm_exec); |
0698aedd ACM |
1980 | if_print(freq); |
1981 | if_print(inherit_stat); | |
1982 | if_print(enable_on_exec); | |
1983 | if_print(task); | |
1984 | if_print(watermark); | |
1985 | if_print(precise_ip); | |
1986 | if_print(mmap_data); | |
1987 | if_print(sample_id_all); | |
1988 | if_print(exclude_host); | |
1989 | if_print(exclude_guest); | |
1990 | if_print(__reserved_1); | |
1991 | if_print(wakeup_events); | |
1992 | if_print(bp_type); | |
1993 | if_print(branch_sample_type); | |
1994 | } | |
e6ab07d0 | 1995 | out: |
0698aedd ACM |
1996 | fputc('\n', fp); |
1997 | return ++printed; | |
1998 | } | |
c0a54341 ACM |
1999 | |
2000 | bool perf_evsel__fallback(struct perf_evsel *evsel, int err, | |
2001 | char *msg, size_t msgsize) | |
2002 | { | |
2b821cce | 2003 | if ((err == ENOENT || err == ENXIO || err == ENODEV) && |
c0a54341 ACM |
2004 | evsel->attr.type == PERF_TYPE_HARDWARE && |
2005 | evsel->attr.config == PERF_COUNT_HW_CPU_CYCLES) { | |
2006 | /* | |
2007 | * If it's cycles then fall back to hrtimer based | |
2008 | * cpu-clock-tick sw counter, which is always available even if | |
2009 | * no PMU support. | |
2010 | * | |
2011 | * PPC returns ENXIO until 2.6.37 (behavior changed with commit | |
2012 | * b0a873e). | |
2013 | */ | |
2014 | scnprintf(msg, msgsize, "%s", | |
2015 | "The cycles event is not supported, trying to fall back to cpu-clock-ticks"); | |
2016 | ||
2017 | evsel->attr.type = PERF_TYPE_SOFTWARE; | |
2018 | evsel->attr.config = PERF_COUNT_SW_CPU_CLOCK; | |
2019 | ||
04662523 | 2020 | zfree(&evsel->name); |
c0a54341 ACM |
2021 | return true; |
2022 | } | |
2023 | ||
2024 | return false; | |
2025 | } | |
56e52e85 | 2026 | |
602ad878 | 2027 | int perf_evsel__open_strerror(struct perf_evsel *evsel, struct target *target, |
56e52e85 ACM |
2028 | int err, char *msg, size_t size) |
2029 | { | |
6e81c74c MH |
2030 | char sbuf[STRERR_BUFSIZE]; |
2031 | ||
56e52e85 ACM |
2032 | switch (err) { |
2033 | case EPERM: | |
2034 | case EACCES: | |
b69e63a4 | 2035 | return scnprintf(msg, size, |
56e52e85 ACM |
2036 | "You may not have permission to collect %sstats.\n" |
2037 | "Consider tweaking /proc/sys/kernel/perf_event_paranoid:\n" | |
2038 | " -1 - Not paranoid at all\n" | |
2039 | " 0 - Disallow raw tracepoint access for unpriv\n" | |
2040 | " 1 - Disallow cpu events for unpriv\n" | |
2041 | " 2 - Disallow kernel profiling for unpriv", | |
2042 | target->system_wide ? "system-wide " : ""); | |
2043 | case ENOENT: | |
2044 | return scnprintf(msg, size, "The %s event is not supported.", | |
2045 | perf_evsel__name(evsel)); | |
2046 | case EMFILE: | |
2047 | return scnprintf(msg, size, "%s", | |
2048 | "Too many events are opened.\n" | |
2049 | "Try again after reducing the number of events."); | |
2050 | case ENODEV: | |
2051 | if (target->cpu_list) | |
2052 | return scnprintf(msg, size, "%s", | |
2053 | "No such device - did you specify an out-of-range profile CPU?\n"); | |
2054 | break; | |
2055 | case EOPNOTSUPP: | |
2056 | if (evsel->attr.precise_ip) | |
2057 | return scnprintf(msg, size, "%s", | |
2058 | "\'precise\' request may not be supported. Try removing 'p' modifier."); | |
2059 | #if defined(__i386__) || defined(__x86_64__) | |
2060 | if (evsel->attr.type == PERF_TYPE_HARDWARE) | |
2061 | return scnprintf(msg, size, "%s", | |
2062 | "No hardware sampling interrupt available.\n" | |
2063 | "No APIC? If so then you can boot the kernel with the \"lapic\" boot parameter to force-enable it."); | |
2064 | #endif | |
2065 | break; | |
63914aca JO |
2066 | case EBUSY: |
2067 | if (find_process("oprofiled")) | |
2068 | return scnprintf(msg, size, | |
2069 | "The PMU counters are busy/taken by another profiler.\n" | |
2070 | "We found oprofile daemon running, please stop it and try again."); | |
2071 | break; | |
56e52e85 ACM |
2072 | default: |
2073 | break; | |
2074 | } | |
2075 | ||
2076 | return scnprintf(msg, size, | |
6e81c74c | 2077 | "The sys_perf_event_open() syscall returned with %d (%s) for event (%s).\n" |
56e52e85 ACM |
2078 | "/bin/dmesg may provide additional information.\n" |
2079 | "No CONFIG_PERF_EVENTS=y kernel support configured?\n", | |
6e81c74c MH |
2080 | err, strerror_r(err, sbuf, sizeof(sbuf)), |
2081 | perf_evsel__name(evsel)); | |
56e52e85 | 2082 | } |