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Arnaldo Carvalho de Melof8a95302011-01-30 10:46:46 -02001/*
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
David Ahern936be502011-09-06 09:12:26 -060010#include <byteswap.h>
Jiri Olsa0f6a3012012-08-07 15:20:45 +020011#include <linux/bitops.h>
David Ahern936be502011-09-06 09:12:26 -060012#include "asm/bug.h"
Borislav Petkov85c66be2013-02-20 16:32:30 +010013#include <lk/debugfs.h>
Arnaldo Carvalho de Melo5555ded2012-09-11 19:24:23 -030014#include "event-parse.h"
Arnaldo Carvalho de Melo69aad6f2011-01-03 16:39:04 -020015#include "evsel.h"
Arnaldo Carvalho de Melo70082dd2011-01-12 17:03:24 -020016#include "evlist.h"
Arnaldo Carvalho de Melo69aad6f2011-01-03 16:39:04 -020017#include "util.h"
Arnaldo Carvalho de Melo86bd5e82011-01-03 23:09:46 -020018#include "cpumap.h"
Arnaldo Carvalho de Melofd782602011-01-18 15:15:24 -020019#include "thread_map.h"
Namhyung Kim12864b32012-04-26 14:15:22 +090020#include "target.h"
David Howellsd2709c72012-11-19 22:21:03 +000021#include <linux/hw_breakpoint.h>
22#include <linux/perf_event.h>
Jiri Olsa26d33022012-08-07 15:20:47 +020023#include "perf_regs.h"
Arnaldo Carvalho de Melo69aad6f2011-01-03 16:39:04 -020024
Arnaldo Carvalho de Melo594ac612012-12-13 13:13:07 -030025static struct {
26 bool sample_id_all;
27 bool exclude_guest;
28} perf_missing_features;
29
Arnaldo Carvalho de Meloc52b12e2011-01-03 17:45:52 -020030#define FD(e, x, y) (*(int *)xyarray__entry(e->fd, x, y))
31
Arnaldo Carvalho de Melobde09462012-08-01 18:53:11 -030032static int __perf_evsel__sample_size(u64 sample_type)
Arnaldo Carvalho de Meloc2a70652011-06-02 11:04:54 -030033{
34 u64 mask = sample_type & PERF_SAMPLE_MASK;
35 int size = 0;
36 int i;
37
38 for (i = 0; i < 64; i++) {
39 if (mask & (1ULL << i))
40 size++;
41 }
42
43 size *= sizeof(u64);
44
45 return size;
46}
47
Jiri Olsa4bf9ce12012-03-22 14:37:26 +010048void hists__init(struct hists *hists)
Arnaldo Carvalho de Melo0e2a5f12011-11-04 08:16:58 -020049{
50 memset(hists, 0, sizeof(*hists));
51 hists->entries_in_array[0] = hists->entries_in_array[1] = RB_ROOT;
52 hists->entries_in = &hists->entries_in_array[0];
53 hists->entries_collapsed = RB_ROOT;
54 hists->entries = RB_ROOT;
55 pthread_mutex_init(&hists->lock, NULL);
56}
57
Arnaldo Carvalho de Melo7be5ebe2012-12-10 14:53:43 -030058void __perf_evsel__set_sample_bit(struct perf_evsel *evsel,
59 enum perf_event_sample_format bit)
60{
61 if (!(evsel->attr.sample_type & bit)) {
62 evsel->attr.sample_type |= bit;
63 evsel->sample_size += sizeof(u64);
64 }
65}
66
67void __perf_evsel__reset_sample_bit(struct perf_evsel *evsel,
68 enum perf_event_sample_format bit)
69{
70 if (evsel->attr.sample_type & bit) {
71 evsel->attr.sample_type &= ~bit;
72 evsel->sample_size -= sizeof(u64);
73 }
74}
75
Arnaldo Carvalho de Melo7a5a5ca2012-12-10 15:21:30 -030076void perf_evsel__set_sample_id(struct perf_evsel *evsel)
77{
78 perf_evsel__set_sample_bit(evsel, ID);
79 evsel->attr.read_format |= PERF_FORMAT_ID;
80}
81
Arnaldo Carvalho de Meloef1d1af2011-01-18 21:41:45 -020082void perf_evsel__init(struct perf_evsel *evsel,
83 struct perf_event_attr *attr, int idx)
84{
85 evsel->idx = idx;
86 evsel->attr = *attr;
Namhyung Kim2cfda562012-11-29 15:38:29 +090087 evsel->leader = evsel;
Arnaldo Carvalho de Meloef1d1af2011-01-18 21:41:45 -020088 INIT_LIST_HEAD(&evsel->node);
Arnaldo Carvalho de Melo1980c2eb2011-10-05 17:50:23 -030089 hists__init(&evsel->hists);
Arnaldo Carvalho de Melobde09462012-08-01 18:53:11 -030090 evsel->sample_size = __perf_evsel__sample_size(attr->sample_type);
Arnaldo Carvalho de Meloef1d1af2011-01-18 21:41:45 -020091}
92
Lin Ming23a2f3a2011-01-07 11:11:09 +080093struct perf_evsel *perf_evsel__new(struct perf_event_attr *attr, int idx)
Arnaldo Carvalho de Melo69aad6f2011-01-03 16:39:04 -020094{
95 struct perf_evsel *evsel = zalloc(sizeof(*evsel));
96
Arnaldo Carvalho de Meloef1d1af2011-01-18 21:41:45 -020097 if (evsel != NULL)
98 perf_evsel__init(evsel, attr, idx);
Arnaldo Carvalho de Melo69aad6f2011-01-03 16:39:04 -020099
100 return evsel;
101}
102
Arnaldo Carvalho de Melo201b7332012-09-26 20:24:19 -0300103struct event_format *event_format__new(const char *sys, const char *name)
Arnaldo Carvalho de Meloefd2b922012-09-18 11:21:50 -0300104{
105 int fd, n;
106 char *filename;
107 void *bf = NULL, *nbf;
108 size_t size = 0, alloc_size = 0;
109 struct event_format *format = NULL;
110
111 if (asprintf(&filename, "%s/%s/%s/format", tracing_events_path, sys, name) < 0)
112 goto out;
113
114 fd = open(filename, O_RDONLY);
115 if (fd < 0)
116 goto out_free_filename;
117
118 do {
119 if (size == alloc_size) {
120 alloc_size += BUFSIZ;
121 nbf = realloc(bf, alloc_size);
122 if (nbf == NULL)
123 goto out_free_bf;
124 bf = nbf;
125 }
126
127 n = read(fd, bf + size, BUFSIZ);
128 if (n < 0)
129 goto out_free_bf;
130 size += n;
131 } while (n > 0);
132
133 pevent_parse_format(&format, bf, size, sys);
134
135out_free_bf:
136 free(bf);
137 close(fd);
138out_free_filename:
139 free(filename);
140out:
141 return format;
142}
143
144struct perf_evsel *perf_evsel__newtp(const char *sys, const char *name, int idx)
145{
146 struct perf_evsel *evsel = zalloc(sizeof(*evsel));
147
148 if (evsel != NULL) {
149 struct perf_event_attr attr = {
Arnaldo Carvalho de Melo0b80f8b32012-09-26 12:28:26 -0300150 .type = PERF_TYPE_TRACEPOINT,
151 .sample_type = (PERF_SAMPLE_RAW | PERF_SAMPLE_TIME |
152 PERF_SAMPLE_CPU | PERF_SAMPLE_PERIOD),
Arnaldo Carvalho de Meloefd2b922012-09-18 11:21:50 -0300153 };
154
Arnaldo Carvalho de Meloe48ffe22012-09-26 17:11:38 -0300155 if (asprintf(&evsel->name, "%s:%s", sys, name) < 0)
156 goto out_free;
157
Arnaldo Carvalho de Meloefd2b922012-09-18 11:21:50 -0300158 evsel->tp_format = event_format__new(sys, name);
159 if (evsel->tp_format == NULL)
160 goto out_free;
161
Arnaldo Carvalho de Melo0b80f8b32012-09-26 12:28:26 -0300162 event_attr_init(&attr);
Arnaldo Carvalho de Meloefd2b922012-09-18 11:21:50 -0300163 attr.config = evsel->tp_format->id;
Arnaldo Carvalho de Melo0b80f8b32012-09-26 12:28:26 -0300164 attr.sample_period = 1;
Arnaldo Carvalho de Meloefd2b922012-09-18 11:21:50 -0300165 perf_evsel__init(evsel, &attr, idx);
Arnaldo Carvalho de Meloefd2b922012-09-18 11:21:50 -0300166 }
167
168 return evsel;
169
170out_free:
Arnaldo Carvalho de Meloe48ffe22012-09-26 17:11:38 -0300171 free(evsel->name);
Arnaldo Carvalho de Meloefd2b922012-09-18 11:21:50 -0300172 free(evsel);
173 return NULL;
174}
175
Arnaldo Carvalho de Melo8ad70132012-09-06 13:11:18 -0300176const char *perf_evsel__hw_names[PERF_COUNT_HW_MAX] = {
Arnaldo Carvalho de Meloc4104312012-05-25 16:38:11 -0300177 "cycles",
178 "instructions",
179 "cache-references",
180 "cache-misses",
181 "branches",
182 "branch-misses",
183 "bus-cycles",
184 "stalled-cycles-frontend",
185 "stalled-cycles-backend",
186 "ref-cycles",
187};
188
Arnaldo Carvalho de Melodd4f5222012-06-13 15:52:42 -0300189static const char *__perf_evsel__hw_name(u64 config)
Arnaldo Carvalho de Meloc4104312012-05-25 16:38:11 -0300190{
191 if (config < PERF_COUNT_HW_MAX && perf_evsel__hw_names[config])
192 return perf_evsel__hw_names[config];
193
194 return "unknown-hardware";
195}
196
Arnaldo Carvalho de Melo27f18612012-06-11 13:33:09 -0300197static int perf_evsel__add_modifiers(struct perf_evsel *evsel, char *bf, size_t size)
Arnaldo Carvalho de Meloc4104312012-05-25 16:38:11 -0300198{
Arnaldo Carvalho de Melo27f18612012-06-11 13:33:09 -0300199 int colon = 0, r = 0;
Arnaldo Carvalho de Meloc4104312012-05-25 16:38:11 -0300200 struct perf_event_attr *attr = &evsel->attr;
Arnaldo Carvalho de Meloc4104312012-05-25 16:38:11 -0300201 bool exclude_guest_default = false;
202
203#define MOD_PRINT(context, mod) do { \
204 if (!attr->exclude_##context) { \
Arnaldo Carvalho de Melo27f18612012-06-11 13:33:09 -0300205 if (!colon) colon = ++r; \
Arnaldo Carvalho de Meloc4104312012-05-25 16:38:11 -0300206 r += scnprintf(bf + r, size - r, "%c", mod); \
207 } } while(0)
208
209 if (attr->exclude_kernel || attr->exclude_user || attr->exclude_hv) {
210 MOD_PRINT(kernel, 'k');
211 MOD_PRINT(user, 'u');
212 MOD_PRINT(hv, 'h');
213 exclude_guest_default = true;
214 }
215
216 if (attr->precise_ip) {
217 if (!colon)
Arnaldo Carvalho de Melo27f18612012-06-11 13:33:09 -0300218 colon = ++r;
Arnaldo Carvalho de Meloc4104312012-05-25 16:38:11 -0300219 r += scnprintf(bf + r, size - r, "%.*s", attr->precise_ip, "ppp");
220 exclude_guest_default = true;
221 }
222
223 if (attr->exclude_host || attr->exclude_guest == exclude_guest_default) {
224 MOD_PRINT(host, 'H');
225 MOD_PRINT(guest, 'G');
226 }
227#undef MOD_PRINT
228 if (colon)
Arnaldo Carvalho de Melo27f18612012-06-11 13:33:09 -0300229 bf[colon - 1] = ':';
Arnaldo Carvalho de Meloc4104312012-05-25 16:38:11 -0300230 return r;
231}
232
Arnaldo Carvalho de Melo27f18612012-06-11 13:33:09 -0300233static int perf_evsel__hw_name(struct perf_evsel *evsel, char *bf, size_t size)
234{
235 int r = scnprintf(bf, size, "%s", __perf_evsel__hw_name(evsel->attr.config));
236 return r + perf_evsel__add_modifiers(evsel, bf + r, size - r);
237}
238
Arnaldo Carvalho de Melo8ad70132012-09-06 13:11:18 -0300239const char *perf_evsel__sw_names[PERF_COUNT_SW_MAX] = {
Arnaldo Carvalho de Melo335c2f52012-06-11 14:36:20 -0300240 "cpu-clock",
241 "task-clock",
242 "page-faults",
243 "context-switches",
Arnaldo Carvalho de Melo8ad70132012-09-06 13:11:18 -0300244 "cpu-migrations",
Arnaldo Carvalho de Melo335c2f52012-06-11 14:36:20 -0300245 "minor-faults",
246 "major-faults",
247 "alignment-faults",
248 "emulation-faults",
249};
250
Arnaldo Carvalho de Melodd4f5222012-06-13 15:52:42 -0300251static const char *__perf_evsel__sw_name(u64 config)
Arnaldo Carvalho de Melo335c2f52012-06-11 14:36:20 -0300252{
253 if (config < PERF_COUNT_SW_MAX && perf_evsel__sw_names[config])
254 return perf_evsel__sw_names[config];
255 return "unknown-software";
256}
257
258static int perf_evsel__sw_name(struct perf_evsel *evsel, char *bf, size_t size)
259{
260 int r = scnprintf(bf, size, "%s", __perf_evsel__sw_name(evsel->attr.config));
261 return r + perf_evsel__add_modifiers(evsel, bf + r, size - r);
262}
263
Jiri Olsa287e74a2012-06-28 23:18:49 +0200264static int __perf_evsel__bp_name(char *bf, size_t size, u64 addr, u64 type)
265{
266 int r;
267
268 r = scnprintf(bf, size, "mem:0x%" PRIx64 ":", addr);
269
270 if (type & HW_BREAKPOINT_R)
271 r += scnprintf(bf + r, size - r, "r");
272
273 if (type & HW_BREAKPOINT_W)
274 r += scnprintf(bf + r, size - r, "w");
275
276 if (type & HW_BREAKPOINT_X)
277 r += scnprintf(bf + r, size - r, "x");
278
279 return r;
280}
281
282static int perf_evsel__bp_name(struct perf_evsel *evsel, char *bf, size_t size)
283{
284 struct perf_event_attr *attr = &evsel->attr;
285 int r = __perf_evsel__bp_name(bf, size, attr->bp_addr, attr->bp_type);
286 return r + perf_evsel__add_modifiers(evsel, bf + r, size - r);
287}
288
Arnaldo Carvalho de Melo0b668bc2012-06-11 14:08:07 -0300289const char *perf_evsel__hw_cache[PERF_COUNT_HW_CACHE_MAX]
290 [PERF_EVSEL__MAX_ALIASES] = {
291 { "L1-dcache", "l1-d", "l1d", "L1-data", },
292 { "L1-icache", "l1-i", "l1i", "L1-instruction", },
293 { "LLC", "L2", },
294 { "dTLB", "d-tlb", "Data-TLB", },
295 { "iTLB", "i-tlb", "Instruction-TLB", },
296 { "branch", "branches", "bpu", "btb", "bpc", },
297 { "node", },
298};
299
300const char *perf_evsel__hw_cache_op[PERF_COUNT_HW_CACHE_OP_MAX]
301 [PERF_EVSEL__MAX_ALIASES] = {
302 { "load", "loads", "read", },
303 { "store", "stores", "write", },
304 { "prefetch", "prefetches", "speculative-read", "speculative-load", },
305};
306
307const char *perf_evsel__hw_cache_result[PERF_COUNT_HW_CACHE_RESULT_MAX]
308 [PERF_EVSEL__MAX_ALIASES] = {
309 { "refs", "Reference", "ops", "access", },
310 { "misses", "miss", },
311};
312
313#define C(x) PERF_COUNT_HW_CACHE_##x
314#define CACHE_READ (1 << C(OP_READ))
315#define CACHE_WRITE (1 << C(OP_WRITE))
316#define CACHE_PREFETCH (1 << C(OP_PREFETCH))
317#define COP(x) (1 << x)
318
319/*
320 * cache operartion stat
321 * L1I : Read and prefetch only
322 * ITLB and BPU : Read-only
323 */
324static unsigned long perf_evsel__hw_cache_stat[C(MAX)] = {
325 [C(L1D)] = (CACHE_READ | CACHE_WRITE | CACHE_PREFETCH),
326 [C(L1I)] = (CACHE_READ | CACHE_PREFETCH),
327 [C(LL)] = (CACHE_READ | CACHE_WRITE | CACHE_PREFETCH),
328 [C(DTLB)] = (CACHE_READ | CACHE_WRITE | CACHE_PREFETCH),
329 [C(ITLB)] = (CACHE_READ),
330 [C(BPU)] = (CACHE_READ),
331 [C(NODE)] = (CACHE_READ | CACHE_WRITE | CACHE_PREFETCH),
332};
333
334bool perf_evsel__is_cache_op_valid(u8 type, u8 op)
335{
336 if (perf_evsel__hw_cache_stat[type] & COP(op))
337 return true; /* valid */
338 else
339 return false; /* invalid */
340}
341
342int __perf_evsel__hw_cache_type_op_res_name(u8 type, u8 op, u8 result,
343 char *bf, size_t size)
344{
345 if (result) {
346 return scnprintf(bf, size, "%s-%s-%s", perf_evsel__hw_cache[type][0],
347 perf_evsel__hw_cache_op[op][0],
348 perf_evsel__hw_cache_result[result][0]);
349 }
350
351 return scnprintf(bf, size, "%s-%s", perf_evsel__hw_cache[type][0],
352 perf_evsel__hw_cache_op[op][1]);
353}
354
Arnaldo Carvalho de Melodd4f5222012-06-13 15:52:42 -0300355static int __perf_evsel__hw_cache_name(u64 config, char *bf, size_t size)
Arnaldo Carvalho de Melo0b668bc2012-06-11 14:08:07 -0300356{
357 u8 op, result, type = (config >> 0) & 0xff;
358 const char *err = "unknown-ext-hardware-cache-type";
359
360 if (type > PERF_COUNT_HW_CACHE_MAX)
361 goto out_err;
362
363 op = (config >> 8) & 0xff;
364 err = "unknown-ext-hardware-cache-op";
365 if (op > PERF_COUNT_HW_CACHE_OP_MAX)
366 goto out_err;
367
368 result = (config >> 16) & 0xff;
369 err = "unknown-ext-hardware-cache-result";
370 if (result > PERF_COUNT_HW_CACHE_RESULT_MAX)
371 goto out_err;
372
373 err = "invalid-cache";
374 if (!perf_evsel__is_cache_op_valid(type, op))
375 goto out_err;
376
377 return __perf_evsel__hw_cache_type_op_res_name(type, op, result, bf, size);
378out_err:
379 return scnprintf(bf, size, "%s", err);
380}
381
382static int perf_evsel__hw_cache_name(struct perf_evsel *evsel, char *bf, size_t size)
383{
384 int ret = __perf_evsel__hw_cache_name(evsel->attr.config, bf, size);
385 return ret + perf_evsel__add_modifiers(evsel, bf + ret, size - ret);
386}
387
Arnaldo Carvalho de Melo6eef3d92012-06-13 11:53:37 -0300388static int perf_evsel__raw_name(struct perf_evsel *evsel, char *bf, size_t size)
389{
390 int ret = scnprintf(bf, size, "raw 0x%" PRIx64, evsel->attr.config);
391 return ret + perf_evsel__add_modifiers(evsel, bf + ret, size - ret);
392}
393
Arnaldo Carvalho de Melo7289f832012-06-12 12:34:58 -0300394const char *perf_evsel__name(struct perf_evsel *evsel)
Arnaldo Carvalho de Meloa4460832012-06-12 10:29:12 -0300395{
Arnaldo Carvalho de Melo7289f832012-06-12 12:34:58 -0300396 char bf[128];
Arnaldo Carvalho de Meloa4460832012-06-12 10:29:12 -0300397
Arnaldo Carvalho de Melo7289f832012-06-12 12:34:58 -0300398 if (evsel->name)
399 return evsel->name;
Arnaldo Carvalho de Meloc4104312012-05-25 16:38:11 -0300400
401 switch (evsel->attr.type) {
402 case PERF_TYPE_RAW:
Arnaldo Carvalho de Melo6eef3d92012-06-13 11:53:37 -0300403 perf_evsel__raw_name(evsel, bf, sizeof(bf));
Arnaldo Carvalho de Meloc4104312012-05-25 16:38:11 -0300404 break;
405
406 case PERF_TYPE_HARDWARE:
Arnaldo Carvalho de Melo7289f832012-06-12 12:34:58 -0300407 perf_evsel__hw_name(evsel, bf, sizeof(bf));
Arnaldo Carvalho de Meloc4104312012-05-25 16:38:11 -0300408 break;
Arnaldo Carvalho de Melo0b668bc2012-06-11 14:08:07 -0300409
410 case PERF_TYPE_HW_CACHE:
Arnaldo Carvalho de Melo7289f832012-06-12 12:34:58 -0300411 perf_evsel__hw_cache_name(evsel, bf, sizeof(bf));
Arnaldo Carvalho de Melo0b668bc2012-06-11 14:08:07 -0300412 break;
413
Arnaldo Carvalho de Melo335c2f52012-06-11 14:36:20 -0300414 case PERF_TYPE_SOFTWARE:
Arnaldo Carvalho de Melo7289f832012-06-12 12:34:58 -0300415 perf_evsel__sw_name(evsel, bf, sizeof(bf));
Arnaldo Carvalho de Melo335c2f52012-06-11 14:36:20 -0300416 break;
417
Arnaldo Carvalho de Meloa4460832012-06-12 10:29:12 -0300418 case PERF_TYPE_TRACEPOINT:
Arnaldo Carvalho de Melo7289f832012-06-12 12:34:58 -0300419 scnprintf(bf, sizeof(bf), "%s", "unknown tracepoint");
Arnaldo Carvalho de Meloa4460832012-06-12 10:29:12 -0300420 break;
421
Jiri Olsa287e74a2012-06-28 23:18:49 +0200422 case PERF_TYPE_BREAKPOINT:
423 perf_evsel__bp_name(evsel, bf, sizeof(bf));
424 break;
425
Arnaldo Carvalho de Meloc4104312012-05-25 16:38:11 -0300426 default:
Robert Richterca1b1452012-08-16 21:10:18 +0200427 scnprintf(bf, sizeof(bf), "unknown attr type: %d",
428 evsel->attr.type);
Arnaldo Carvalho de Meloa4460832012-06-12 10:29:12 -0300429 break;
Arnaldo Carvalho de Meloc4104312012-05-25 16:38:11 -0300430 }
431
Arnaldo Carvalho de Melo7289f832012-06-12 12:34:58 -0300432 evsel->name = strdup(bf);
433
434 return evsel->name ?: "unknown";
Arnaldo Carvalho de Meloc4104312012-05-25 16:38:11 -0300435}
436
Namhyung Kim717e2632013-01-22 18:09:44 +0900437const char *perf_evsel__group_name(struct perf_evsel *evsel)
438{
439 return evsel->group_name ?: "anon group";
440}
441
442int perf_evsel__group_desc(struct perf_evsel *evsel, char *buf, size_t size)
443{
444 int ret;
445 struct perf_evsel *pos;
446 const char *group_name = perf_evsel__group_name(evsel);
447
448 ret = scnprintf(buf, size, "%s", group_name);
449
450 ret += scnprintf(buf + ret, size - ret, " { %s",
451 perf_evsel__name(evsel));
452
453 for_each_group_member(pos, evsel)
454 ret += scnprintf(buf + ret, size - ret, ", %s",
455 perf_evsel__name(pos));
456
457 ret += scnprintf(buf + ret, size - ret, " }");
458
459 return ret;
460}
461
Jiri Olsa774cb492012-11-12 18:34:01 +0100462/*
463 * The enable_on_exec/disabled value strategy:
464 *
465 * 1) For any type of traced program:
466 * - all independent events and group leaders are disabled
467 * - all group members are enabled
468 *
469 * Group members are ruled by group leaders. They need to
470 * be enabled, because the group scheduling relies on that.
471 *
472 * 2) For traced programs executed by perf:
473 * - all independent events and group leaders have
474 * enable_on_exec set
475 * - we don't specifically enable or disable any event during
476 * the record command
477 *
478 * Independent events and group leaders are initially disabled
479 * and get enabled by exec. Group members are ruled by group
480 * leaders as stated in 1).
481 *
482 * 3) For traced programs attached by perf (pid/tid):
483 * - we specifically enable or disable all events during
484 * the record command
485 *
486 * When attaching events to already running traced we
487 * enable/disable events specifically, as there's no
488 * initial traced exec call.
489 */
Jiri Olsacac21422012-11-12 18:34:00 +0100490void perf_evsel__config(struct perf_evsel *evsel,
491 struct perf_record_opts *opts)
Arnaldo Carvalho de Melo0f82ebc2011-11-08 14:41:57 -0200492{
493 struct perf_event_attr *attr = &evsel->attr;
494 int track = !evsel->idx; /* only the first counter needs these */
495
Arnaldo Carvalho de Melo594ac612012-12-13 13:13:07 -0300496 attr->sample_id_all = perf_missing_features.sample_id_all ? 0 : 1;
Arnaldo Carvalho de Melo0f82ebc2011-11-08 14:41:57 -0200497 attr->inherit = !opts->no_inherit;
Arnaldo Carvalho de Melo0f82ebc2011-11-08 14:41:57 -0200498
Arnaldo Carvalho de Melo7be5ebe2012-12-10 14:53:43 -0300499 perf_evsel__set_sample_bit(evsel, IP);
500 perf_evsel__set_sample_bit(evsel, TID);
Arnaldo Carvalho de Melo0f82ebc2011-11-08 14:41:57 -0200501
502 /*
503 * We default some events to a 1 default interval. But keep
504 * it a weak assumption overridable by the user.
505 */
506 if (!attr->sample_period || (opts->user_freq != UINT_MAX &&
507 opts->user_interval != ULLONG_MAX)) {
508 if (opts->freq) {
Arnaldo Carvalho de Melo7be5ebe2012-12-10 14:53:43 -0300509 perf_evsel__set_sample_bit(evsel, PERIOD);
Arnaldo Carvalho de Melo0f82ebc2011-11-08 14:41:57 -0200510 attr->freq = 1;
511 attr->sample_freq = opts->freq;
512 } else {
513 attr->sample_period = opts->default_interval;
514 }
515 }
516
517 if (opts->no_samples)
518 attr->sample_freq = 0;
519
520 if (opts->inherit_stat)
521 attr->inherit_stat = 1;
522
523 if (opts->sample_address) {
Arnaldo Carvalho de Melo7be5ebe2012-12-10 14:53:43 -0300524 perf_evsel__set_sample_bit(evsel, ADDR);
Arnaldo Carvalho de Melo0f82ebc2011-11-08 14:41:57 -0200525 attr->mmap_data = track;
526 }
527
Jiri Olsa26d33022012-08-07 15:20:47 +0200528 if (opts->call_graph) {
Arnaldo Carvalho de Melo7be5ebe2012-12-10 14:53:43 -0300529 perf_evsel__set_sample_bit(evsel, CALLCHAIN);
Arnaldo Carvalho de Melo0f82ebc2011-11-08 14:41:57 -0200530
Jiri Olsa26d33022012-08-07 15:20:47 +0200531 if (opts->call_graph == CALLCHAIN_DWARF) {
Arnaldo Carvalho de Melo7be5ebe2012-12-10 14:53:43 -0300532 perf_evsel__set_sample_bit(evsel, REGS_USER);
533 perf_evsel__set_sample_bit(evsel, STACK_USER);
Jiri Olsa26d33022012-08-07 15:20:47 +0200534 attr->sample_regs_user = PERF_REGS_MASK;
535 attr->sample_stack_user = opts->stack_dump_size;
536 attr->exclude_callchain_user = 1;
537 }
538 }
539
Namhyung Kime40ee742012-05-21 10:42:07 +0900540 if (perf_target__has_cpu(&opts->target))
Arnaldo Carvalho de Melo7be5ebe2012-12-10 14:53:43 -0300541 perf_evsel__set_sample_bit(evsel, CPU);
Arnaldo Carvalho de Melo0f82ebc2011-11-08 14:41:57 -0200542
Andrew Vagin3e76ac72011-12-20 17:32:45 +0300543 if (opts->period)
Arnaldo Carvalho de Melo7be5ebe2012-12-10 14:53:43 -0300544 perf_evsel__set_sample_bit(evsel, PERIOD);
Andrew Vagin3e76ac72011-12-20 17:32:45 +0300545
Arnaldo Carvalho de Melo594ac612012-12-13 13:13:07 -0300546 if (!perf_missing_features.sample_id_all &&
Namhyung Kimd67356e2012-05-07 14:09:03 +0900547 (opts->sample_time || !opts->no_inherit ||
Namhyung Kimaa22dd42012-05-16 18:45:47 +0900548 perf_target__has_cpu(&opts->target)))
Arnaldo Carvalho de Melo7be5ebe2012-12-10 14:53:43 -0300549 perf_evsel__set_sample_bit(evsel, TIME);
Arnaldo Carvalho de Melo0f82ebc2011-11-08 14:41:57 -0200550
551 if (opts->raw_samples) {
Arnaldo Carvalho de Melo7be5ebe2012-12-10 14:53:43 -0300552 perf_evsel__set_sample_bit(evsel, TIME);
553 perf_evsel__set_sample_bit(evsel, RAW);
554 perf_evsel__set_sample_bit(evsel, CPU);
Arnaldo Carvalho de Melo0f82ebc2011-11-08 14:41:57 -0200555 }
556
Stephane Eranianccf49bf2013-01-24 16:10:37 +0100557 if (opts->sample_address)
558 attr->sample_type |= PERF_SAMPLE_DATA_SRC;
559
Arnaldo Carvalho de Melo0f82ebc2011-11-08 14:41:57 -0200560 if (opts->no_delay) {
561 attr->watermark = 0;
562 attr->wakeup_events = 1;
563 }
Roberto Agostino Vitillobdfebd82012-02-09 23:21:02 +0100564 if (opts->branch_stack) {
Arnaldo Carvalho de Melo7be5ebe2012-12-10 14:53:43 -0300565 perf_evsel__set_sample_bit(evsel, BRANCH_STACK);
Roberto Agostino Vitillobdfebd82012-02-09 23:21:02 +0100566 attr->branch_sample_type = opts->branch_stack;
567 }
Arnaldo Carvalho de Melo0f82ebc2011-11-08 14:41:57 -0200568
Andi Kleen05484292013-01-24 16:10:29 +0100569 if (opts->sample_weight)
570 attr->sample_type |= PERF_SAMPLE_WEIGHT;
571
Arnaldo Carvalho de Melo0f82ebc2011-11-08 14:41:57 -0200572 attr->mmap = track;
573 attr->comm = track;
574
Jiri Olsa774cb492012-11-12 18:34:01 +0100575 /*
576 * XXX see the function comment above
577 *
578 * Disabling only independent events or group leaders,
579 * keeping group members enabled.
580 */
Namhyung Kim823254e2012-11-29 15:38:30 +0900581 if (perf_evsel__is_group_leader(evsel))
Jiri Olsa774cb492012-11-12 18:34:01 +0100582 attr->disabled = 1;
583
584 /*
585 * Setting enable_on_exec for independent events and
586 * group leaders for traced executed by perf.
587 */
Namhyung Kim823254e2012-11-29 15:38:30 +0900588 if (perf_target__none(&opts->target) && perf_evsel__is_group_leader(evsel))
Arnaldo Carvalho de Melo0f82ebc2011-11-08 14:41:57 -0200589 attr->enable_on_exec = 1;
Arnaldo Carvalho de Melo0f82ebc2011-11-08 14:41:57 -0200590}
591
Arnaldo Carvalho de Melo69aad6f2011-01-03 16:39:04 -0200592int perf_evsel__alloc_fd(struct perf_evsel *evsel, int ncpus, int nthreads)
593{
David Ahern4af4c952011-05-27 09:58:34 -0600594 int cpu, thread;
Arnaldo Carvalho de Melo69aad6f2011-01-03 16:39:04 -0200595 evsel->fd = xyarray__new(ncpus, nthreads, sizeof(int));
David Ahern4af4c952011-05-27 09:58:34 -0600596
597 if (evsel->fd) {
598 for (cpu = 0; cpu < ncpus; cpu++) {
599 for (thread = 0; thread < nthreads; thread++) {
600 FD(evsel, cpu, thread) = -1;
601 }
602 }
603 }
604
Arnaldo Carvalho de Melo69aad6f2011-01-03 16:39:04 -0200605 return evsel->fd != NULL ? 0 : -ENOMEM;
606}
607
Arnaldo Carvalho de Melo745cefc2012-09-26 15:07:39 -0300608int perf_evsel__set_filter(struct perf_evsel *evsel, int ncpus, int nthreads,
609 const char *filter)
610{
611 int cpu, thread;
612
613 for (cpu = 0; cpu < ncpus; cpu++) {
614 for (thread = 0; thread < nthreads; thread++) {
615 int fd = FD(evsel, cpu, thread),
616 err = ioctl(fd, PERF_EVENT_IOC_SET_FILTER, filter);
617
618 if (err)
619 return err;
620 }
621 }
622
623 return 0;
624}
625
Arnaldo Carvalho de Melo70db7532011-01-12 22:39:13 -0200626int perf_evsel__alloc_id(struct perf_evsel *evsel, int ncpus, int nthreads)
627{
Arnaldo Carvalho de Meloa91e5432011-03-10 11:15:54 -0300628 evsel->sample_id = xyarray__new(ncpus, nthreads, sizeof(struct perf_sample_id));
629 if (evsel->sample_id == NULL)
630 return -ENOMEM;
631
632 evsel->id = zalloc(ncpus * nthreads * sizeof(u64));
633 if (evsel->id == NULL) {
634 xyarray__delete(evsel->sample_id);
635 evsel->sample_id = NULL;
636 return -ENOMEM;
637 }
638
639 return 0;
Arnaldo Carvalho de Melo70db7532011-01-12 22:39:13 -0200640}
641
Frederik Deweerdta7e191c2013-03-01 13:02:27 -0500642void perf_evsel__reset_counts(struct perf_evsel *evsel, int ncpus)
643{
644 memset(evsel->counts, 0, (sizeof(*evsel->counts) +
645 (ncpus * sizeof(struct perf_counts_values))));
646}
647
Arnaldo Carvalho de Meloc52b12e2011-01-03 17:45:52 -0200648int perf_evsel__alloc_counts(struct perf_evsel *evsel, int ncpus)
649{
650 evsel->counts = zalloc((sizeof(*evsel->counts) +
651 (ncpus * sizeof(struct perf_counts_values))));
652 return evsel->counts != NULL ? 0 : -ENOMEM;
653}
654
Arnaldo Carvalho de Melo69aad6f2011-01-03 16:39:04 -0200655void perf_evsel__free_fd(struct perf_evsel *evsel)
656{
657 xyarray__delete(evsel->fd);
658 evsel->fd = NULL;
659}
660
Arnaldo Carvalho de Melo70db7532011-01-12 22:39:13 -0200661void perf_evsel__free_id(struct perf_evsel *evsel)
662{
Arnaldo Carvalho de Meloa91e5432011-03-10 11:15:54 -0300663 xyarray__delete(evsel->sample_id);
664 evsel->sample_id = NULL;
665 free(evsel->id);
Arnaldo Carvalho de Melo70db7532011-01-12 22:39:13 -0200666 evsel->id = NULL;
667}
668
Arnaldo Carvalho de Meloc52b12e2011-01-03 17:45:52 -0200669void perf_evsel__close_fd(struct perf_evsel *evsel, int ncpus, int nthreads)
670{
671 int cpu, thread;
672
673 for (cpu = 0; cpu < ncpus; cpu++)
674 for (thread = 0; thread < nthreads; ++thread) {
675 close(FD(evsel, cpu, thread));
676 FD(evsel, cpu, thread) = -1;
677 }
678}
679
Namhyung Kim43f8e762013-01-25 10:44:44 +0900680void perf_evsel__free_counts(struct perf_evsel *evsel)
681{
682 free(evsel->counts);
683}
684
Arnaldo Carvalho de Meloef1d1af2011-01-18 21:41:45 -0200685void perf_evsel__exit(struct perf_evsel *evsel)
Arnaldo Carvalho de Melo69aad6f2011-01-03 16:39:04 -0200686{
687 assert(list_empty(&evsel->node));
Namhyung Kim736b05a2013-03-15 14:48:49 +0900688 perf_evsel__free_fd(evsel);
689 perf_evsel__free_id(evsel);
Arnaldo Carvalho de Meloef1d1af2011-01-18 21:41:45 -0200690}
691
692void perf_evsel__delete(struct perf_evsel *evsel)
693{
694 perf_evsel__exit(evsel);
Stephane Eranian023695d2011-02-14 11:20:01 +0200695 close_cgroup(evsel->cgrp);
Jiri Olsa6a4bb042012-08-08 12:22:36 +0200696 free(evsel->group_name);
Arnaldo Carvalho de Meloe48ffe22012-09-26 17:11:38 -0300697 if (evsel->tp_format)
Arnaldo Carvalho de Meloefd2b922012-09-18 11:21:50 -0300698 pevent_free_format(evsel->tp_format);
Stephane Eranianf0c55bc2011-02-16 15:10:01 +0200699 free(evsel->name);
Arnaldo Carvalho de Melo69aad6f2011-01-03 16:39:04 -0200700 free(evsel);
701}
Arnaldo Carvalho de Meloc52b12e2011-01-03 17:45:52 -0200702
Stephane Eranianc7a79c42013-01-29 12:47:43 +0100703static inline void compute_deltas(struct perf_evsel *evsel,
704 int cpu,
705 struct perf_counts_values *count)
706{
707 struct perf_counts_values tmp;
708
709 if (!evsel->prev_raw_counts)
710 return;
711
712 if (cpu == -1) {
713 tmp = evsel->prev_raw_counts->aggr;
714 evsel->prev_raw_counts->aggr = *count;
715 } else {
716 tmp = evsel->prev_raw_counts->cpu[cpu];
717 evsel->prev_raw_counts->cpu[cpu] = *count;
718 }
719
720 count->val = count->val - tmp.val;
721 count->ena = count->ena - tmp.ena;
722 count->run = count->run - tmp.run;
723}
724
Arnaldo Carvalho de Meloc52b12e2011-01-03 17:45:52 -0200725int __perf_evsel__read_on_cpu(struct perf_evsel *evsel,
726 int cpu, int thread, bool scale)
727{
728 struct perf_counts_values count;
729 size_t nv = scale ? 3 : 1;
730
731 if (FD(evsel, cpu, thread) < 0)
732 return -EINVAL;
733
Arnaldo Carvalho de Melo4eed11d2011-01-04 00:13:17 -0200734 if (evsel->counts == NULL && perf_evsel__alloc_counts(evsel, cpu + 1) < 0)
735 return -ENOMEM;
736
Arnaldo Carvalho de Meloc52b12e2011-01-03 17:45:52 -0200737 if (readn(FD(evsel, cpu, thread), &count, nv * sizeof(u64)) < 0)
738 return -errno;
739
Stephane Eranianc7a79c42013-01-29 12:47:43 +0100740 compute_deltas(evsel, cpu, &count);
741
Arnaldo Carvalho de Meloc52b12e2011-01-03 17:45:52 -0200742 if (scale) {
743 if (count.run == 0)
744 count.val = 0;
745 else if (count.run < count.ena)
746 count.val = (u64)((double)count.val * count.ena / count.run + 0.5);
747 } else
748 count.ena = count.run = 0;
749
750 evsel->counts->cpu[cpu] = count;
751 return 0;
752}
753
754int __perf_evsel__read(struct perf_evsel *evsel,
755 int ncpus, int nthreads, bool scale)
756{
757 size_t nv = scale ? 3 : 1;
758 int cpu, thread;
759 struct perf_counts_values *aggr = &evsel->counts->aggr, count;
760
Arnaldo Carvalho de Melo52bcd9942011-02-03 17:26:06 -0200761 aggr->val = aggr->ena = aggr->run = 0;
Arnaldo Carvalho de Meloc52b12e2011-01-03 17:45:52 -0200762
763 for (cpu = 0; cpu < ncpus; cpu++) {
764 for (thread = 0; thread < nthreads; thread++) {
765 if (FD(evsel, cpu, thread) < 0)
766 continue;
767
768 if (readn(FD(evsel, cpu, thread),
769 &count, nv * sizeof(u64)) < 0)
770 return -errno;
771
772 aggr->val += count.val;
773 if (scale) {
774 aggr->ena += count.ena;
775 aggr->run += count.run;
776 }
777 }
778 }
779
Stephane Eranianc7a79c42013-01-29 12:47:43 +0100780 compute_deltas(evsel, -1, aggr);
781
Arnaldo Carvalho de Meloc52b12e2011-01-03 17:45:52 -0200782 evsel->counts->scaled = 0;
783 if (scale) {
784 if (aggr->run == 0) {
785 evsel->counts->scaled = -1;
786 aggr->val = 0;
787 return 0;
788 }
789
790 if (aggr->run < aggr->ena) {
791 evsel->counts->scaled = 1;
792 aggr->val = (u64)((double)aggr->val * aggr->ena / aggr->run + 0.5);
793 }
794 } else
795 aggr->ena = aggr->run = 0;
796
797 return 0;
798}
Arnaldo Carvalho de Melo48290602011-01-03 17:48:12 -0200799
Jiri Olsa6a4bb042012-08-08 12:22:36 +0200800static int get_group_fd(struct perf_evsel *evsel, int cpu, int thread)
801{
802 struct perf_evsel *leader = evsel->leader;
803 int fd;
804
Namhyung Kim823254e2012-11-29 15:38:30 +0900805 if (perf_evsel__is_group_leader(evsel))
Jiri Olsa6a4bb042012-08-08 12:22:36 +0200806 return -1;
807
808 /*
809 * Leader must be already processed/open,
810 * if not it's a bug.
811 */
812 BUG_ON(!leader->fd);
813
814 fd = FD(leader, cpu, thread);
815 BUG_ON(fd == -1);
816
817 return fd;
818}
819
Arnaldo Carvalho de Melo02522082011-01-04 11:55:27 -0200820static int __perf_evsel__open(struct perf_evsel *evsel, struct cpu_map *cpus,
Jiri Olsa6a4bb042012-08-08 12:22:36 +0200821 struct thread_map *threads)
Arnaldo Carvalho de Melo48290602011-01-03 17:48:12 -0200822{
Arnaldo Carvalho de Melo02522082011-01-04 11:55:27 -0200823 int cpu, thread;
Stephane Eranian023695d2011-02-14 11:20:01 +0200824 unsigned long flags = 0;
Arnaldo Carvalho de Melo727ab042011-10-25 10:42:19 -0200825 int pid = -1, err;
Arnaldo Carvalho de Melo48290602011-01-03 17:48:12 -0200826
Arnaldo Carvalho de Melo02522082011-01-04 11:55:27 -0200827 if (evsel->fd == NULL &&
828 perf_evsel__alloc_fd(evsel, cpus->nr, threads->nr) < 0)
Arnaldo Carvalho de Melo727ab042011-10-25 10:42:19 -0200829 return -ENOMEM;
Arnaldo Carvalho de Melo4eed11d2011-01-04 00:13:17 -0200830
Stephane Eranian023695d2011-02-14 11:20:01 +0200831 if (evsel->cgrp) {
832 flags = PERF_FLAG_PID_CGROUP;
833 pid = evsel->cgrp->fd;
834 }
835
Arnaldo Carvalho de Melo594ac612012-12-13 13:13:07 -0300836fallback_missing_features:
837 if (perf_missing_features.exclude_guest)
838 evsel->attr.exclude_guest = evsel->attr.exclude_host = 0;
839retry_sample_id:
840 if (perf_missing_features.sample_id_all)
841 evsel->attr.sample_id_all = 0;
842
Arnaldo Carvalho de Melo86bd5e82011-01-03 23:09:46 -0200843 for (cpu = 0; cpu < cpus->nr; cpu++) {
Arnaldo Carvalho de Melo9d04f172011-01-12 00:08:18 -0200844
Arnaldo Carvalho de Melo02522082011-01-04 11:55:27 -0200845 for (thread = 0; thread < threads->nr; thread++) {
Jiri Olsa6a4bb042012-08-08 12:22:36 +0200846 int group_fd;
Stephane Eranian023695d2011-02-14 11:20:01 +0200847
848 if (!evsel->cgrp)
849 pid = threads->map[thread];
850
Jiri Olsa6a4bb042012-08-08 12:22:36 +0200851 group_fd = get_group_fd(evsel, cpu, thread);
852
Arnaldo Carvalho de Melo02522082011-01-04 11:55:27 -0200853 FD(evsel, cpu, thread) = sys_perf_event_open(&evsel->attr,
Stephane Eranian023695d2011-02-14 11:20:01 +0200854 pid,
Arnaldo Carvalho de Melof08199d2011-01-11 23:42:19 -0200855 cpus->map[cpu],
Stephane Eranian023695d2011-02-14 11:20:01 +0200856 group_fd, flags);
Arnaldo Carvalho de Melo727ab042011-10-25 10:42:19 -0200857 if (FD(evsel, cpu, thread) < 0) {
858 err = -errno;
Arnaldo Carvalho de Melo594ac612012-12-13 13:13:07 -0300859 goto try_fallback;
Arnaldo Carvalho de Melo727ab042011-10-25 10:42:19 -0200860 }
Arnaldo Carvalho de Melo02522082011-01-04 11:55:27 -0200861 }
Arnaldo Carvalho de Melo48290602011-01-03 17:48:12 -0200862 }
863
864 return 0;
865
Arnaldo Carvalho de Melo594ac612012-12-13 13:13:07 -0300866try_fallback:
867 if (err != -EINVAL || cpu > 0 || thread > 0)
868 goto out_close;
869
870 if (!perf_missing_features.exclude_guest &&
871 (evsel->attr.exclude_guest || evsel->attr.exclude_host)) {
872 perf_missing_features.exclude_guest = true;
873 goto fallback_missing_features;
874 } else if (!perf_missing_features.sample_id_all) {
875 perf_missing_features.sample_id_all = true;
876 goto retry_sample_id;
877 }
878
Arnaldo Carvalho de Melo48290602011-01-03 17:48:12 -0200879out_close:
Arnaldo Carvalho de Melo02522082011-01-04 11:55:27 -0200880 do {
881 while (--thread >= 0) {
882 close(FD(evsel, cpu, thread));
883 FD(evsel, cpu, thread) = -1;
884 }
885 thread = threads->nr;
886 } while (--cpu >= 0);
Arnaldo Carvalho de Melo727ab042011-10-25 10:42:19 -0200887 return err;
888}
889
890void perf_evsel__close(struct perf_evsel *evsel, int ncpus, int nthreads)
891{
892 if (evsel->fd == NULL)
893 return;
894
895 perf_evsel__close_fd(evsel, ncpus, nthreads);
896 perf_evsel__free_fd(evsel);
897 evsel->fd = NULL;
Arnaldo Carvalho de Melo48290602011-01-03 17:48:12 -0200898}
899
Arnaldo Carvalho de Melo02522082011-01-04 11:55:27 -0200900static struct {
901 struct cpu_map map;
902 int cpus[1];
903} empty_cpu_map = {
904 .map.nr = 1,
905 .cpus = { -1, },
906};
907
908static struct {
909 struct thread_map map;
910 int threads[1];
911} empty_thread_map = {
912 .map.nr = 1,
913 .threads = { -1, },
914};
915
Arnaldo Carvalho de Melof08199d2011-01-11 23:42:19 -0200916int perf_evsel__open(struct perf_evsel *evsel, struct cpu_map *cpus,
Jiri Olsa6a4bb042012-08-08 12:22:36 +0200917 struct thread_map *threads)
Arnaldo Carvalho de Melo02522082011-01-04 11:55:27 -0200918{
Arnaldo Carvalho de Melo02522082011-01-04 11:55:27 -0200919 if (cpus == NULL) {
920 /* Work around old compiler warnings about strict aliasing */
921 cpus = &empty_cpu_map.map;
922 }
923
924 if (threads == NULL)
925 threads = &empty_thread_map.map;
926
Jiri Olsa6a4bb042012-08-08 12:22:36 +0200927 return __perf_evsel__open(evsel, cpus, threads);
Arnaldo Carvalho de Melo02522082011-01-04 11:55:27 -0200928}
929
Arnaldo Carvalho de Melof08199d2011-01-11 23:42:19 -0200930int perf_evsel__open_per_cpu(struct perf_evsel *evsel,
Jiri Olsa6a4bb042012-08-08 12:22:36 +0200931 struct cpu_map *cpus)
Arnaldo Carvalho de Melo02522082011-01-04 11:55:27 -0200932{
Jiri Olsa6a4bb042012-08-08 12:22:36 +0200933 return __perf_evsel__open(evsel, cpus, &empty_thread_map.map);
Arnaldo Carvalho de Melo02522082011-01-04 11:55:27 -0200934}
935
Arnaldo Carvalho de Melof08199d2011-01-11 23:42:19 -0200936int perf_evsel__open_per_thread(struct perf_evsel *evsel,
Jiri Olsa6a4bb042012-08-08 12:22:36 +0200937 struct thread_map *threads)
Arnaldo Carvalho de Melo48290602011-01-03 17:48:12 -0200938{
Jiri Olsa6a4bb042012-08-08 12:22:36 +0200939 return __perf_evsel__open(evsel, &empty_cpu_map.map, threads);
Arnaldo Carvalho de Melo48290602011-01-03 17:48:12 -0200940}
Arnaldo Carvalho de Melo70082dd2011-01-12 17:03:24 -0200941
Arnaldo Carvalho de Melo0807d2d2012-09-26 12:48:18 -0300942static int perf_evsel__parse_id_sample(const struct perf_evsel *evsel,
943 const union perf_event *event,
944 struct perf_sample *sample)
Arnaldo Carvalho de Melod0dd74e2011-01-21 13:46:41 -0200945{
Arnaldo Carvalho de Melo0807d2d2012-09-26 12:48:18 -0300946 u64 type = evsel->attr.sample_type;
Arnaldo Carvalho de Melod0dd74e2011-01-21 13:46:41 -0200947 const u64 *array = event->sample.array;
Arnaldo Carvalho de Melo0807d2d2012-09-26 12:48:18 -0300948 bool swapped = evsel->needs_swap;
Jiri Olsa37073f92012-05-30 14:23:44 +0200949 union u64_swap u;
Arnaldo Carvalho de Melod0dd74e2011-01-21 13:46:41 -0200950
951 array += ((event->header.size -
952 sizeof(event->header)) / sizeof(u64)) - 1;
953
954 if (type & PERF_SAMPLE_CPU) {
Jiri Olsa37073f92012-05-30 14:23:44 +0200955 u.val64 = *array;
956 if (swapped) {
957 /* undo swap of u64, then swap on individual u32s */
958 u.val64 = bswap_64(u.val64);
959 u.val32[0] = bswap_32(u.val32[0]);
960 }
961
962 sample->cpu = u.val32[0];
Arnaldo Carvalho de Melod0dd74e2011-01-21 13:46:41 -0200963 array--;
964 }
965
966 if (type & PERF_SAMPLE_STREAM_ID) {
967 sample->stream_id = *array;
968 array--;
969 }
970
971 if (type & PERF_SAMPLE_ID) {
972 sample->id = *array;
973 array--;
974 }
975
976 if (type & PERF_SAMPLE_TIME) {
977 sample->time = *array;
978 array--;
979 }
980
981 if (type & PERF_SAMPLE_TID) {
Jiri Olsa37073f92012-05-30 14:23:44 +0200982 u.val64 = *array;
983 if (swapped) {
984 /* undo swap of u64, then swap on individual u32s */
985 u.val64 = bswap_64(u.val64);
986 u.val32[0] = bswap_32(u.val32[0]);
987 u.val32[1] = bswap_32(u.val32[1]);
988 }
989
990 sample->pid = u.val32[0];
991 sample->tid = u.val32[1];
Arnaldo Carvalho de Melod0dd74e2011-01-21 13:46:41 -0200992 }
993
994 return 0;
995}
996
Frederic Weisbecker98e1da92011-05-21 20:08:15 +0200997static bool sample_overlap(const union perf_event *event,
998 const void *offset, u64 size)
999{
1000 const void *base = event;
1001
1002 if (offset + size > base + event->header.size)
1003 return true;
1004
1005 return false;
1006}
1007
Arnaldo Carvalho de Meloa3f698f2012-08-02 12:23:46 -03001008int perf_evsel__parse_sample(struct perf_evsel *evsel, union perf_event *event,
Arnaldo Carvalho de Melo0807d2d2012-09-26 12:48:18 -03001009 struct perf_sample *data)
Arnaldo Carvalho de Melod0dd74e2011-01-21 13:46:41 -02001010{
Arnaldo Carvalho de Meloa3f698f2012-08-02 12:23:46 -03001011 u64 type = evsel->attr.sample_type;
Jiri Olsa0f6a3012012-08-07 15:20:45 +02001012 u64 regs_user = evsel->attr.sample_regs_user;
Arnaldo Carvalho de Melo0807d2d2012-09-26 12:48:18 -03001013 bool swapped = evsel->needs_swap;
Arnaldo Carvalho de Melod0dd74e2011-01-21 13:46:41 -02001014 const u64 *array;
1015
David Ahern936be502011-09-06 09:12:26 -06001016 /*
1017 * used for cross-endian analysis. See git commit 65014ab3
1018 * for why this goofiness is needed.
1019 */
Jiri Olsa6a11f922012-05-16 08:59:04 +02001020 union u64_swap u;
David Ahern936be502011-09-06 09:12:26 -06001021
Robert Richterf3bda2c2011-12-15 17:32:39 +01001022 memset(data, 0, sizeof(*data));
Arnaldo Carvalho de Melod0dd74e2011-01-21 13:46:41 -02001023 data->cpu = data->pid = data->tid = -1;
1024 data->stream_id = data->id = data->time = -1ULL;
Naveen N. Raoa4a03fc2012-02-03 22:31:13 +05301025 data->period = 1;
Andi Kleen05484292013-01-24 16:10:29 +01001026 data->weight = 0;
Arnaldo Carvalho de Melod0dd74e2011-01-21 13:46:41 -02001027
1028 if (event->header.type != PERF_RECORD_SAMPLE) {
Arnaldo Carvalho de Meloa3f698f2012-08-02 12:23:46 -03001029 if (!evsel->attr.sample_id_all)
Arnaldo Carvalho de Melod0dd74e2011-01-21 13:46:41 -02001030 return 0;
Arnaldo Carvalho de Melo0807d2d2012-09-26 12:48:18 -03001031 return perf_evsel__parse_id_sample(evsel, event, data);
Arnaldo Carvalho de Melod0dd74e2011-01-21 13:46:41 -02001032 }
1033
1034 array = event->sample.array;
1035
Arnaldo Carvalho de Meloa3f698f2012-08-02 12:23:46 -03001036 if (evsel->sample_size + sizeof(event->header) > event->header.size)
Frederic Weisbeckera2854122011-05-21 19:33:04 +02001037 return -EFAULT;
1038
Arnaldo Carvalho de Melod0dd74e2011-01-21 13:46:41 -02001039 if (type & PERF_SAMPLE_IP) {
1040 data->ip = event->ip.ip;
1041 array++;
1042 }
1043
1044 if (type & PERF_SAMPLE_TID) {
David Ahern936be502011-09-06 09:12:26 -06001045 u.val64 = *array;
1046 if (swapped) {
1047 /* undo swap of u64, then swap on individual u32s */
1048 u.val64 = bswap_64(u.val64);
1049 u.val32[0] = bswap_32(u.val32[0]);
1050 u.val32[1] = bswap_32(u.val32[1]);
1051 }
1052
1053 data->pid = u.val32[0];
1054 data->tid = u.val32[1];
Arnaldo Carvalho de Melod0dd74e2011-01-21 13:46:41 -02001055 array++;
1056 }
1057
1058 if (type & PERF_SAMPLE_TIME) {
1059 data->time = *array;
1060 array++;
1061 }
1062
David Ahern7cec0922011-05-30 13:08:23 -06001063 data->addr = 0;
Arnaldo Carvalho de Melod0dd74e2011-01-21 13:46:41 -02001064 if (type & PERF_SAMPLE_ADDR) {
1065 data->addr = *array;
1066 array++;
1067 }
1068
1069 data->id = -1ULL;
1070 if (type & PERF_SAMPLE_ID) {
1071 data->id = *array;
1072 array++;
1073 }
1074
1075 if (type & PERF_SAMPLE_STREAM_ID) {
1076 data->stream_id = *array;
1077 array++;
1078 }
1079
1080 if (type & PERF_SAMPLE_CPU) {
David Ahern936be502011-09-06 09:12:26 -06001081
1082 u.val64 = *array;
1083 if (swapped) {
1084 /* undo swap of u64, then swap on individual u32s */
1085 u.val64 = bswap_64(u.val64);
1086 u.val32[0] = bswap_32(u.val32[0]);
1087 }
1088
1089 data->cpu = u.val32[0];
Arnaldo Carvalho de Melod0dd74e2011-01-21 13:46:41 -02001090 array++;
1091 }
1092
1093 if (type & PERF_SAMPLE_PERIOD) {
1094 data->period = *array;
1095 array++;
1096 }
1097
1098 if (type & PERF_SAMPLE_READ) {
Masanari Iidaf9d36992012-01-25 15:20:40 +01001099 fprintf(stderr, "PERF_SAMPLE_READ is unsupported for now\n");
Arnaldo Carvalho de Melod0dd74e2011-01-21 13:46:41 -02001100 return -1;
1101 }
1102
1103 if (type & PERF_SAMPLE_CALLCHAIN) {
Frederic Weisbecker98e1da92011-05-21 20:08:15 +02001104 if (sample_overlap(event, array, sizeof(data->callchain->nr)))
1105 return -EFAULT;
1106
Arnaldo Carvalho de Melod0dd74e2011-01-21 13:46:41 -02001107 data->callchain = (struct ip_callchain *)array;
Frederic Weisbecker98e1da92011-05-21 20:08:15 +02001108
1109 if (sample_overlap(event, array, data->callchain->nr))
1110 return -EFAULT;
1111
Arnaldo Carvalho de Melod0dd74e2011-01-21 13:46:41 -02001112 array += 1 + data->callchain->nr;
1113 }
1114
1115 if (type & PERF_SAMPLE_RAW) {
Jiri Olsa8e303f22011-09-29 17:05:08 +02001116 const u64 *pdata;
1117
David Ahern936be502011-09-06 09:12:26 -06001118 u.val64 = *array;
1119 if (WARN_ONCE(swapped,
1120 "Endianness of raw data not corrected!\n")) {
1121 /* undo swap of u64, then swap on individual u32s */
1122 u.val64 = bswap_64(u.val64);
1123 u.val32[0] = bswap_32(u.val32[0]);
1124 u.val32[1] = bswap_32(u.val32[1]);
1125 }
Frederic Weisbecker98e1da92011-05-21 20:08:15 +02001126
1127 if (sample_overlap(event, array, sizeof(u32)))
1128 return -EFAULT;
1129
David Ahern936be502011-09-06 09:12:26 -06001130 data->raw_size = u.val32[0];
Jiri Olsa8e303f22011-09-29 17:05:08 +02001131 pdata = (void *) array + sizeof(u32);
Frederic Weisbecker98e1da92011-05-21 20:08:15 +02001132
Jiri Olsa8e303f22011-09-29 17:05:08 +02001133 if (sample_overlap(event, pdata, data->raw_size))
Frederic Weisbecker98e1da92011-05-21 20:08:15 +02001134 return -EFAULT;
1135
Jiri Olsa8e303f22011-09-29 17:05:08 +02001136 data->raw_data = (void *) pdata;
Stephane Eranianfa30c962012-03-17 23:23:18 +01001137
1138 array = (void *)array + data->raw_size + sizeof(u32);
Arnaldo Carvalho de Melod0dd74e2011-01-21 13:46:41 -02001139 }
1140
Roberto Agostino Vitillob5387522012-02-09 23:21:01 +01001141 if (type & PERF_SAMPLE_BRANCH_STACK) {
1142 u64 sz;
1143
1144 data->branch_stack = (struct branch_stack *)array;
1145 array++; /* nr */
1146
1147 sz = data->branch_stack->nr * sizeof(struct branch_entry);
1148 sz /= sizeof(u64);
1149 array += sz;
1150 }
Jiri Olsa0f6a3012012-08-07 15:20:45 +02001151
1152 if (type & PERF_SAMPLE_REGS_USER) {
1153 /* First u64 tells us if we have any regs in sample. */
1154 u64 avail = *array++;
1155
1156 if (avail) {
1157 data->user_regs.regs = (u64 *)array;
1158 array += hweight_long(regs_user);
1159 }
1160 }
1161
1162 if (type & PERF_SAMPLE_STACK_USER) {
1163 u64 size = *array++;
1164
1165 data->user_stack.offset = ((char *)(array - 1)
1166 - (char *) event);
1167
1168 if (!size) {
1169 data->user_stack.size = 0;
1170 } else {
1171 data->user_stack.data = (char *)array;
1172 array += size / sizeof(*array);
1173 data->user_stack.size = *array;
1174 }
1175 }
1176
Andi Kleen05484292013-01-24 16:10:29 +01001177 data->weight = 0;
1178 if (type & PERF_SAMPLE_WEIGHT) {
1179 data->weight = *array;
1180 array++;
1181 }
1182
Stephane Eranian98a3b322013-01-24 16:10:35 +01001183 data->data_src = PERF_MEM_DATA_SRC_NONE;
1184 if (type & PERF_SAMPLE_DATA_SRC) {
1185 data->data_src = *array;
1186 array++;
1187 }
1188
Arnaldo Carvalho de Melod0dd74e2011-01-21 13:46:41 -02001189 return 0;
1190}
Andrew Vagin74eec262011-11-28 12:03:31 +03001191
1192int perf_event__synthesize_sample(union perf_event *event, u64 type,
1193 const struct perf_sample *sample,
1194 bool swapped)
1195{
1196 u64 *array;
1197
1198 /*
1199 * used for cross-endian analysis. See git commit 65014ab3
1200 * for why this goofiness is needed.
1201 */
Jiri Olsa6a11f922012-05-16 08:59:04 +02001202 union u64_swap u;
Andrew Vagin74eec262011-11-28 12:03:31 +03001203
1204 array = event->sample.array;
1205
1206 if (type & PERF_SAMPLE_IP) {
1207 event->ip.ip = sample->ip;
1208 array++;
1209 }
1210
1211 if (type & PERF_SAMPLE_TID) {
1212 u.val32[0] = sample->pid;
1213 u.val32[1] = sample->tid;
1214 if (swapped) {
1215 /*
Arnaldo Carvalho de Meloa3f698f2012-08-02 12:23:46 -03001216 * Inverse of what is done in perf_evsel__parse_sample
Andrew Vagin74eec262011-11-28 12:03:31 +03001217 */
1218 u.val32[0] = bswap_32(u.val32[0]);
1219 u.val32[1] = bswap_32(u.val32[1]);
1220 u.val64 = bswap_64(u.val64);
1221 }
1222
1223 *array = u.val64;
1224 array++;
1225 }
1226
1227 if (type & PERF_SAMPLE_TIME) {
1228 *array = sample->time;
1229 array++;
1230 }
1231
1232 if (type & PERF_SAMPLE_ADDR) {
1233 *array = sample->addr;
1234 array++;
1235 }
1236
1237 if (type & PERF_SAMPLE_ID) {
1238 *array = sample->id;
1239 array++;
1240 }
1241
1242 if (type & PERF_SAMPLE_STREAM_ID) {
1243 *array = sample->stream_id;
1244 array++;
1245 }
1246
1247 if (type & PERF_SAMPLE_CPU) {
1248 u.val32[0] = sample->cpu;
1249 if (swapped) {
1250 /*
Arnaldo Carvalho de Meloa3f698f2012-08-02 12:23:46 -03001251 * Inverse of what is done in perf_evsel__parse_sample
Andrew Vagin74eec262011-11-28 12:03:31 +03001252 */
1253 u.val32[0] = bswap_32(u.val32[0]);
1254 u.val64 = bswap_64(u.val64);
1255 }
1256 *array = u.val64;
1257 array++;
1258 }
1259
1260 if (type & PERF_SAMPLE_PERIOD) {
1261 *array = sample->period;
1262 array++;
1263 }
1264
1265 return 0;
1266}
Arnaldo Carvalho de Melo5555ded2012-09-11 19:24:23 -03001267
Arnaldo Carvalho de Meloefd2b922012-09-18 11:21:50 -03001268struct format_field *perf_evsel__field(struct perf_evsel *evsel, const char *name)
1269{
1270 return pevent_find_field(evsel->tp_format, name);
1271}
1272
Arnaldo Carvalho de Melo5d2074e2012-09-26 20:22:00 -03001273void *perf_evsel__rawptr(struct perf_evsel *evsel, struct perf_sample *sample,
Arnaldo Carvalho de Melo5555ded2012-09-11 19:24:23 -03001274 const char *name)
1275{
Arnaldo Carvalho de Meloefd2b922012-09-18 11:21:50 -03001276 struct format_field *field = perf_evsel__field(evsel, name);
Arnaldo Carvalho de Melo5555ded2012-09-11 19:24:23 -03001277 int offset;
1278
Arnaldo Carvalho de Meloefd2b922012-09-18 11:21:50 -03001279 if (!field)
1280 return NULL;
Arnaldo Carvalho de Melo5555ded2012-09-11 19:24:23 -03001281
1282 offset = field->offset;
1283
1284 if (field->flags & FIELD_IS_DYNAMIC) {
1285 offset = *(int *)(sample->raw_data + field->offset);
1286 offset &= 0xffff;
1287 }
1288
1289 return sample->raw_data + offset;
1290}
1291
1292u64 perf_evsel__intval(struct perf_evsel *evsel, struct perf_sample *sample,
1293 const char *name)
1294{
Arnaldo Carvalho de Meloefd2b922012-09-18 11:21:50 -03001295 struct format_field *field = perf_evsel__field(evsel, name);
Arnaldo Carvalho de Meloe6b6f672012-09-26 13:13:04 -03001296 void *ptr;
1297 u64 value;
Arnaldo Carvalho de Melo5555ded2012-09-11 19:24:23 -03001298
Arnaldo Carvalho de Meloefd2b922012-09-18 11:21:50 -03001299 if (!field)
1300 return 0;
Arnaldo Carvalho de Melo5555ded2012-09-11 19:24:23 -03001301
Arnaldo Carvalho de Meloe6b6f672012-09-26 13:13:04 -03001302 ptr = sample->raw_data + field->offset;
Arnaldo Carvalho de Melo5555ded2012-09-11 19:24:23 -03001303
Arnaldo Carvalho de Meloe6b6f672012-09-26 13:13:04 -03001304 switch (field->size) {
1305 case 1:
1306 return *(u8 *)ptr;
1307 case 2:
1308 value = *(u16 *)ptr;
1309 break;
1310 case 4:
1311 value = *(u32 *)ptr;
1312 break;
1313 case 8:
1314 value = *(u64 *)ptr;
1315 break;
1316 default:
1317 return 0;
1318 }
1319
1320 if (!evsel->needs_swap)
1321 return value;
1322
1323 switch (field->size) {
1324 case 2:
1325 return bswap_16(value);
1326 case 4:
1327 return bswap_32(value);
1328 case 8:
1329 return bswap_64(value);
1330 default:
1331 return 0;
1332 }
1333
1334 return 0;
Arnaldo Carvalho de Melo5555ded2012-09-11 19:24:23 -03001335}
Arnaldo Carvalho de Melo0698aed2012-12-10 18:17:08 -03001336
1337static int comma_fprintf(FILE *fp, bool *first, const char *fmt, ...)
1338{
1339 va_list args;
1340 int ret = 0;
1341
1342 if (!*first) {
1343 ret += fprintf(fp, ",");
1344 } else {
1345 ret += fprintf(fp, ":");
1346 *first = false;
1347 }
1348
1349 va_start(args, fmt);
1350 ret += vfprintf(fp, fmt, args);
1351 va_end(args);
1352 return ret;
1353}
1354
1355static int __if_fprintf(FILE *fp, bool *first, const char *field, u64 value)
1356{
1357 if (value == 0)
1358 return 0;
1359
1360 return comma_fprintf(fp, first, " %s: %" PRIu64, field, value);
1361}
1362
1363#define if_print(field) printed += __if_fprintf(fp, &first, #field, evsel->attr.field)
1364
Arnaldo Carvalho de Meloc79a4392012-12-11 10:54:12 -03001365struct bit_names {
1366 int bit;
1367 const char *name;
1368};
1369
1370static int bits__fprintf(FILE *fp, const char *field, u64 value,
1371 struct bit_names *bits, bool *first)
1372{
1373 int i = 0, printed = comma_fprintf(fp, first, " %s: ", field);
1374 bool first_bit = true;
1375
1376 do {
1377 if (value & bits[i].bit) {
1378 printed += fprintf(fp, "%s%s", first_bit ? "" : "|", bits[i].name);
1379 first_bit = false;
1380 }
1381 } while (bits[++i].name != NULL);
1382
1383 return printed;
1384}
1385
1386static int sample_type__fprintf(FILE *fp, bool *first, u64 value)
1387{
1388#define bit_name(n) { PERF_SAMPLE_##n, #n }
1389 struct bit_names bits[] = {
1390 bit_name(IP), bit_name(TID), bit_name(TIME), bit_name(ADDR),
1391 bit_name(READ), bit_name(CALLCHAIN), bit_name(ID), bit_name(CPU),
1392 bit_name(PERIOD), bit_name(STREAM_ID), bit_name(RAW),
1393 bit_name(BRANCH_STACK), bit_name(REGS_USER), bit_name(STACK_USER),
1394 { .name = NULL, }
1395 };
1396#undef bit_name
1397 return bits__fprintf(fp, "sample_type", value, bits, first);
1398}
1399
1400static int read_format__fprintf(FILE *fp, bool *first, u64 value)
1401{
1402#define bit_name(n) { PERF_FORMAT_##n, #n }
1403 struct bit_names bits[] = {
1404 bit_name(TOTAL_TIME_ENABLED), bit_name(TOTAL_TIME_RUNNING),
1405 bit_name(ID), bit_name(GROUP),
1406 { .name = NULL, }
1407 };
1408#undef bit_name
1409 return bits__fprintf(fp, "read_format", value, bits, first);
1410}
1411
Arnaldo Carvalho de Melo0698aed2012-12-10 18:17:08 -03001412int perf_evsel__fprintf(struct perf_evsel *evsel,
1413 struct perf_attr_details *details, FILE *fp)
1414{
1415 bool first = true;
Namhyung Kime6ab07d2013-01-22 18:09:47 +09001416 int printed = 0;
1417
Arnaldo Carvalho de Meloe35ef3552013-02-06 17:20:02 -03001418 if (details->event_group) {
Namhyung Kime6ab07d2013-01-22 18:09:47 +09001419 struct perf_evsel *pos;
1420
1421 if (!perf_evsel__is_group_leader(evsel))
1422 return 0;
1423
1424 if (evsel->nr_members > 1)
1425 printed += fprintf(fp, "%s{", evsel->group_name ?: "");
1426
1427 printed += fprintf(fp, "%s", perf_evsel__name(evsel));
1428 for_each_group_member(pos, evsel)
1429 printed += fprintf(fp, ",%s", perf_evsel__name(pos));
1430
1431 if (evsel->nr_members > 1)
1432 printed += fprintf(fp, "}");
1433 goto out;
1434 }
1435
1436 printed += fprintf(fp, "%s", perf_evsel__name(evsel));
Arnaldo Carvalho de Melo0698aed2012-12-10 18:17:08 -03001437
1438 if (details->verbose || details->freq) {
1439 printed += comma_fprintf(fp, &first, " sample_freq=%" PRIu64,
1440 (u64)evsel->attr.sample_freq);
1441 }
1442
1443 if (details->verbose) {
1444 if_print(type);
1445 if_print(config);
1446 if_print(config1);
1447 if_print(config2);
1448 if_print(size);
Arnaldo Carvalho de Meloc79a4392012-12-11 10:54:12 -03001449 printed += sample_type__fprintf(fp, &first, evsel->attr.sample_type);
1450 if (evsel->attr.read_format)
1451 printed += read_format__fprintf(fp, &first, evsel->attr.read_format);
Arnaldo Carvalho de Melo0698aed2012-12-10 18:17:08 -03001452 if_print(disabled);
1453 if_print(inherit);
1454 if_print(pinned);
1455 if_print(exclusive);
1456 if_print(exclude_user);
1457 if_print(exclude_kernel);
1458 if_print(exclude_hv);
1459 if_print(exclude_idle);
1460 if_print(mmap);
1461 if_print(comm);
1462 if_print(freq);
1463 if_print(inherit_stat);
1464 if_print(enable_on_exec);
1465 if_print(task);
1466 if_print(watermark);
1467 if_print(precise_ip);
1468 if_print(mmap_data);
1469 if_print(sample_id_all);
1470 if_print(exclude_host);
1471 if_print(exclude_guest);
1472 if_print(__reserved_1);
1473 if_print(wakeup_events);
1474 if_print(bp_type);
1475 if_print(branch_sample_type);
1476 }
Namhyung Kime6ab07d2013-01-22 18:09:47 +09001477out:
Arnaldo Carvalho de Melo0698aed2012-12-10 18:17:08 -03001478 fputc('\n', fp);
1479 return ++printed;
1480}
Arnaldo Carvalho de Meloc0a54342012-12-13 14:16:30 -03001481
1482bool perf_evsel__fallback(struct perf_evsel *evsel, int err,
1483 char *msg, size_t msgsize)
1484{
1485 if ((err == ENOENT || err == ENXIO) &&
1486 evsel->attr.type == PERF_TYPE_HARDWARE &&
1487 evsel->attr.config == PERF_COUNT_HW_CPU_CYCLES) {
1488 /*
1489 * If it's cycles then fall back to hrtimer based
1490 * cpu-clock-tick sw counter, which is always available even if
1491 * no PMU support.
1492 *
1493 * PPC returns ENXIO until 2.6.37 (behavior changed with commit
1494 * b0a873e).
1495 */
1496 scnprintf(msg, msgsize, "%s",
1497"The cycles event is not supported, trying to fall back to cpu-clock-ticks");
1498
1499 evsel->attr.type = PERF_TYPE_SOFTWARE;
1500 evsel->attr.config = PERF_COUNT_SW_CPU_CLOCK;
1501
1502 free(evsel->name);
1503 evsel->name = NULL;
1504 return true;
1505 }
1506
1507 return false;
1508}
Arnaldo Carvalho de Melo56e52e82012-12-13 15:10:58 -03001509
1510int perf_evsel__open_strerror(struct perf_evsel *evsel,
1511 struct perf_target *target,
1512 int err, char *msg, size_t size)
1513{
1514 switch (err) {
1515 case EPERM:
1516 case EACCES:
David Ahernb69e63a2013-05-25 17:54:00 -06001517 return scnprintf(msg, size,
Arnaldo Carvalho de Melo56e52e82012-12-13 15:10:58 -03001518 "You may not have permission to collect %sstats.\n"
1519 "Consider tweaking /proc/sys/kernel/perf_event_paranoid:\n"
1520 " -1 - Not paranoid at all\n"
1521 " 0 - Disallow raw tracepoint access for unpriv\n"
1522 " 1 - Disallow cpu events for unpriv\n"
1523 " 2 - Disallow kernel profiling for unpriv",
1524 target->system_wide ? "system-wide " : "");
1525 case ENOENT:
1526 return scnprintf(msg, size, "The %s event is not supported.",
1527 perf_evsel__name(evsel));
1528 case EMFILE:
1529 return scnprintf(msg, size, "%s",
1530 "Too many events are opened.\n"
1531 "Try again after reducing the number of events.");
1532 case ENODEV:
1533 if (target->cpu_list)
1534 return scnprintf(msg, size, "%s",
1535 "No such device - did you specify an out-of-range profile CPU?\n");
1536 break;
1537 case EOPNOTSUPP:
1538 if (evsel->attr.precise_ip)
1539 return scnprintf(msg, size, "%s",
1540 "\'precise\' request may not be supported. Try removing 'p' modifier.");
1541#if defined(__i386__) || defined(__x86_64__)
1542 if (evsel->attr.type == PERF_TYPE_HARDWARE)
1543 return scnprintf(msg, size, "%s",
1544 "No hardware sampling interrupt available.\n"
1545 "No APIC? If so then you can boot the kernel with the \"lapic\" boot parameter to force-enable it.");
1546#endif
1547 break;
1548 default:
1549 break;
1550 }
1551
1552 return scnprintf(msg, size,
1553 "The sys_perf_event_open() syscall returned with %d (%s) for event (%s). \n"
1554 "/bin/dmesg may provide additional information.\n"
1555 "No CONFIG_PERF_EVENTS=y kernel support configured?\n",
1556 err, strerror(err), perf_evsel__name(evsel));
1557}