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perf: Add PERF_RECORD_MISC_MMAP_DATA to RECORD_MMAP
[linux-2.6-block.git] / tools / perf / util / evsel.c
CommitLineData
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>
936be503 12#include "asm/bug.h"
85c66be1 13#include <lk/debugfs.h>
5555ded4 14#include "event-parse.h"
69aad6f1 15#include "evsel.h"
70082dd9 16#include "evlist.h"
69aad6f1 17#include "util.h"
86bd5e86 18#include "cpumap.h"
fd78260b 19#include "thread_map.h"
12864b31 20#include "target.h"
d2709c7c
DH		 21#include <linux/hw_breakpoint.h>
22#include <linux/perf_event.h>
26d33022 23#include "perf_regs.h"
69aad6f1 24
594ac61a
ACM		 25static struct {
26 bool sample_id_all;
27 bool exclude_guest;
28} perf_missing_features;
29
c52b12ed
ACM		 30#define FD(e, x, y) (*(int *)xyarray__entry(e->fd, x, y))
31
bde09467 32static int __perf_evsel__sample_size(u64 sample_type)
c2a70653
ACM		 33{
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
4bf9ce1b 48void hists__init(struct hists *hists)
0e2a5f10
ACM		 49{
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
7be5ebe8
ACM		 58void __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
7a5a5ca5
ACM		 76void 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
ef1d1af2
ACM		 82void perf_evsel__init(struct perf_evsel *evsel,
83 struct perf_event_attr *attr, int idx)
84{
85 evsel->idx = idx;
86 evsel->attr = *attr;
2cfda562 87 evsel->leader = evsel;
ef1d1af2 88 INIT_LIST_HEAD(&evsel->node);
1980c2eb 89 hists__init(&evsel->hists);
bde09467 90 evsel->sample_size = __perf_evsel__sample_size(attr->sample_type);
ef1d1af2
ACM		 91}
92
23a2f3ab 93struct perf_evsel *perf_evsel__new(struct perf_event_attr *attr, int idx)
69aad6f1
ACM		 94{
95 struct perf_evsel *evsel = zalloc(sizeof(*evsel));
96
ef1d1af2
ACM		 97 if (evsel != NULL)
98 perf_evsel__init(evsel, attr, idx);
69aad6f1
ACM		 99
100 return evsel;
101}
102
201b7334 103struct event_format *event_format__new(const char *sys, const char *name)
efd2b924
ACM		 104{
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 = {
0b80f8b3
ACM		 150 .type = PERF_TYPE_TRACEPOINT,
151 .sample_type = (PERF_SAMPLE_RAW | PERF_SAMPLE_TIME |
152 PERF_SAMPLE_CPU | PERF_SAMPLE_PERIOD),
efd2b924
ACM		 153 };
154
e48ffe2b
ACM		 155 if (asprintf(&evsel->name, "%s:%s", sys, name) < 0)
156 goto out_free;
157
efd2b924
ACM		 158 evsel->tp_format = event_format__new(sys, name);
159 if (evsel->tp_format == NULL)
160 goto out_free;
161
0b80f8b3 162 event_attr_init(&attr);
efd2b924 163 attr.config = evsel->tp_format->id;
0b80f8b3 164 attr.sample_period = 1;
efd2b924 165 perf_evsel__init(evsel, &attr, idx);
efd2b924
ACM		 166 }
167
168 return evsel;
169
170out_free:
e48ffe2b 171 free(evsel->name);
efd2b924
ACM		 172 free(evsel);
173 return NULL;
174}
175
8ad7013b 176const char *perf_evsel__hw_names[PERF_COUNT_HW_MAX] = {
c410431c
ACM		 177 "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
dd4f5223 189static const char *__perf_evsel__hw_name(u64 config)
c410431c
ACM		 190{
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
27f18617 197static int perf_evsel__add_modifiers(struct perf_evsel *evsel, char *bf, size_t size)
c410431c 198{
27f18617 199 int colon = 0, r = 0;
c410431c 200 struct perf_event_attr *attr = &evsel->attr;
c410431c
ACM		 201 bool exclude_guest_default = false;
202
203#define MOD_PRINT(context, mod) do { \
204 if (!attr->exclude_##context) { \
27f18617 205 if (!colon) colon = ++r; \
c410431c
ACM		 206 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)
27f18617 218 colon = ++r;
c410431c
ACM		 219 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)
27f18617 229 bf[colon - 1] = ':';
c410431c
ACM		 230 return r;
231}
232
27f18617
ACM		 233static 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
8ad7013b 239const char *perf_evsel__sw_names[PERF_COUNT_SW_MAX] = {
335c2f5d
ACM		 240 "cpu-clock",
241 "task-clock",
242 "page-faults",
243 "context-switches",
8ad7013b 244 "cpu-migrations",
335c2f5d
ACM		 245 "minor-faults",
246 "major-faults",
247 "alignment-faults",
248 "emulation-faults",
249};
250
dd4f5223 251static const char *__perf_evsel__sw_name(u64 config)
335c2f5d
ACM		 252{
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
287e74aa
JO		 264static 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
0b668bc9
ACM		 289const 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
dd4f5223 355static int __perf_evsel__hw_cache_name(u64 config, char *bf, size_t size)
0b668bc9
ACM		 356{
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
6eef3d9c
ACM		 388static 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
7289f83c 394const char *perf_evsel__name(struct perf_evsel *evsel)
a4460836 395{
7289f83c 396 char bf[128];
a4460836 397
7289f83c
ACM		 398 if (evsel->name)
399 return evsel->name;
c410431c
ACM		 400
401 switch (evsel->attr.type) {
402 case PERF_TYPE_RAW:
6eef3d9c 403 perf_evsel__raw_name(evsel, bf, sizeof(bf));
c410431c
ACM		 404 break;
405
406 case PERF_TYPE_HARDWARE:
7289f83c 407 perf_evsel__hw_name(evsel, bf, sizeof(bf));
c410431c 408 break;
0b668bc9
ACM		 409
410 case PERF_TYPE_HW_CACHE:
7289f83c 411 perf_evsel__hw_cache_name(evsel, bf, sizeof(bf));
0b668bc9
ACM		 412 break;
413
335c2f5d 414 case PERF_TYPE_SOFTWARE:
7289f83c 415 perf_evsel__sw_name(evsel, bf, sizeof(bf));
335c2f5d
ACM		 416 break;
417
a4460836 418 case PERF_TYPE_TRACEPOINT:
7289f83c 419 scnprintf(bf, sizeof(bf), "%s", "unknown tracepoint");
a4460836
ACM		 420 break;
421
287e74aa
JO		 422 case PERF_TYPE_BREAKPOINT:
423 perf_evsel__bp_name(evsel, bf, sizeof(bf));
424 break;
425
c410431c 426 default:
ca1b1457
RR		 427 scnprintf(bf, sizeof(bf), "unknown attr type: %d",
428 evsel->attr.type);
a4460836 429 break;
c410431c
ACM		 430 }
431
7289f83c
ACM		 432 evsel->name = strdup(bf);
433
434 return evsel->name ?: "unknown";
c410431c
ACM		 435}
436
717e263f
NK		 437const 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
774cb499
JO		 462/*
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 */
cac21425
JO		 490void perf_evsel__config(struct perf_evsel *evsel,
491 struct perf_record_opts *opts)
0f82ebc4
ACM		 492{
493 struct perf_event_attr *attr = &evsel->attr;
494 int track = !evsel->idx; /* only the first counter needs these */
495
594ac61a 496 attr->sample_id_all = perf_missing_features.sample_id_all ? 0 : 1;
0f82ebc4 497 attr->inherit = !opts->no_inherit;
0f82ebc4 498
7be5ebe8
ACM		 499 perf_evsel__set_sample_bit(evsel, IP);
500 perf_evsel__set_sample_bit(evsel, TID);
0f82ebc4
ACM		 501
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) {
7be5ebe8 509 perf_evsel__set_sample_bit(evsel, PERIOD);
0f82ebc4
ACM		 510 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) {
7be5ebe8 524 perf_evsel__set_sample_bit(evsel, ADDR);
0f82ebc4
ACM		 525 attr->mmap_data = track;
526 }
527
26d33022 528 if (opts->call_graph) {
7be5ebe8 529 perf_evsel__set_sample_bit(evsel, CALLCHAIN);
0f82ebc4 530
26d33022 531 if (opts->call_graph == CALLCHAIN_DWARF) {
7be5ebe8
ACM		 532 perf_evsel__set_sample_bit(evsel, REGS_USER);
533 perf_evsel__set_sample_bit(evsel, STACK_USER);
26d33022
JO		 534 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
e40ee742 540 if (perf_target__has_cpu(&opts->target))
7be5ebe8 541 perf_evsel__set_sample_bit(evsel, CPU);
0f82ebc4 542
3e76ac78 543 if (opts->period)
7be5ebe8 544 perf_evsel__set_sample_bit(evsel, PERIOD);
3e76ac78 545
594ac61a 546 if (!perf_missing_features.sample_id_all &&
d67356e7 547 (opts->sample_time || !opts->no_inherit ||
aa22dd49 548 perf_target__has_cpu(&opts->target)))
7be5ebe8 549 perf_evsel__set_sample_bit(evsel, TIME);
0f82ebc4
ACM		 550
551 if (opts->raw_samples) {
7be5ebe8
ACM		 552 perf_evsel__set_sample_bit(evsel, TIME);
553 perf_evsel__set_sample_bit(evsel, RAW);
554 perf_evsel__set_sample_bit(evsel, CPU);
0f82ebc4
ACM		 555 }
556
557 if (opts->no_delay) {
558 attr->watermark = 0;
559 attr->wakeup_events = 1;
560 }
bdfebd84 561 if (opts->branch_stack) {
7be5ebe8 562 perf_evsel__set_sample_bit(evsel, BRANCH_STACK);
bdfebd84
RAV		 563 attr->branch_sample_type = opts->branch_stack;
564 }
0f82ebc4
ACM		 565
566 attr->mmap = track;
567 attr->comm = track;
568
774cb499
JO		 569 /*
570 * XXX see the function comment above
571 *
572 * Disabling only independent events or group leaders,
573 * keeping group members enabled.
574 */
823254ed 575 if (perf_evsel__is_group_leader(evsel))
774cb499
JO		 576 attr->disabled = 1;
577
578 /*
579 * Setting enable_on_exec for independent events and
580 * group leaders for traced executed by perf.
581 */
823254ed 582 if (perf_target__none(&opts->target) && perf_evsel__is_group_leader(evsel))
0f82ebc4 583 attr->enable_on_exec = 1;
0f82ebc4
ACM		 584}
585
69aad6f1
ACM		 586int perf_evsel__alloc_fd(struct perf_evsel *evsel, int ncpus, int nthreads)
587{
4af4c955 588 int cpu, thread;
69aad6f1 589 evsel->fd = xyarray__new(ncpus, nthreads, sizeof(int));
4af4c955
DA		 590
591 if (evsel->fd) {
592 for (cpu = 0; cpu < ncpus; cpu++) {
593 for (thread = 0; thread < nthreads; thread++) {
594 FD(evsel, cpu, thread) = -1;
595 }
596 }
597 }
598
69aad6f1
ACM		 599 return evsel->fd != NULL ? 0 : -ENOMEM;
600}
601
745cefc5
ACM		 602int perf_evsel__set_filter(struct perf_evsel *evsel, int ncpus, int nthreads,
603 const char *filter)
604{
605 int cpu, thread;
606
607 for (cpu = 0; cpu < ncpus; cpu++) {
608 for (thread = 0; thread < nthreads; thread++) {
609 int fd = FD(evsel, cpu, thread),
610 err = ioctl(fd, PERF_EVENT_IOC_SET_FILTER, filter);
611
612 if (err)
613 return err;
614 }
615 }
616
617 return 0;
618}
619
70db7533
ACM		 620int perf_evsel__alloc_id(struct perf_evsel *evsel, int ncpus, int nthreads)
621{
a91e5431
ACM		 622 evsel->sample_id = xyarray__new(ncpus, nthreads, sizeof(struct perf_sample_id));
623 if (evsel->sample_id == NULL)
624 return -ENOMEM;
625
626 evsel->id = zalloc(ncpus * nthreads * sizeof(u64));
627 if (evsel->id == NULL) {
628 xyarray__delete(evsel->sample_id);
629 evsel->sample_id = NULL;
630 return -ENOMEM;
631 }
632
633 return 0;
70db7533
ACM		 634}
635
a7e191c3
FD		 636void perf_evsel__reset_counts(struct perf_evsel *evsel, int ncpus)
637{
638 memset(evsel->counts, 0, (sizeof(*evsel->counts) +
639 (ncpus * sizeof(struct perf_counts_values))));
640}
641
c52b12ed
ACM		 642int perf_evsel__alloc_counts(struct perf_evsel *evsel, int ncpus)
643{
644 evsel->counts = zalloc((sizeof(*evsel->counts) +
645 (ncpus * sizeof(struct perf_counts_values))));
646 return evsel->counts != NULL ? 0 : -ENOMEM;
647}
648
69aad6f1
ACM		 649void perf_evsel__free_fd(struct perf_evsel *evsel)
650{
651 xyarray__delete(evsel->fd);
652 evsel->fd = NULL;
653}
654
70db7533
ACM		 655void perf_evsel__free_id(struct perf_evsel *evsel)
656{
a91e5431
ACM		 657 xyarray__delete(evsel->sample_id);
658 evsel->sample_id = NULL;
659 free(evsel->id);
70db7533
ACM		 660 evsel->id = NULL;
661}
662
c52b12ed
ACM		 663void perf_evsel__close_fd(struct perf_evsel *evsel, int ncpus, int nthreads)
664{
665 int cpu, thread;
666
667 for (cpu = 0; cpu < ncpus; cpu++)
668 for (thread = 0; thread < nthreads; ++thread) {
669 close(FD(evsel, cpu, thread));
670 FD(evsel, cpu, thread) = -1;
671 }
672}
673
43f8e76e
NK		 674void perf_evsel__free_counts(struct perf_evsel *evsel)
675{
676 free(evsel->counts);
677}
678
ef1d1af2 679void perf_evsel__exit(struct perf_evsel *evsel)
69aad6f1
ACM		 680{
681 assert(list_empty(&evsel->node));
736b05a0
NK		 682 perf_evsel__free_fd(evsel);
683 perf_evsel__free_id(evsel);
ef1d1af2
ACM		 684}
685
686void perf_evsel__delete(struct perf_evsel *evsel)
687{
688 perf_evsel__exit(evsel);
023695d9 689 close_cgroup(evsel->cgrp);
6a4bb04c 690 free(evsel->group_name);
e48ffe2b 691 if (evsel->tp_format)
efd2b924 692 pevent_free_format(evsel->tp_format);
f0c55bcf 693 free(evsel->name);
69aad6f1
ACM		 694 free(evsel);
695}
c52b12ed 696
c7a79c47
SE		 697static inline void compute_deltas(struct perf_evsel *evsel,
698 int cpu,
699 struct perf_counts_values *count)
700{
701 struct perf_counts_values tmp;
702
703 if (!evsel->prev_raw_counts)
704 return;
705
706 if (cpu == -1) {
707 tmp = evsel->prev_raw_counts->aggr;
708 evsel->prev_raw_counts->aggr = *count;
709 } else {
710 tmp = evsel->prev_raw_counts->cpu[cpu];
711 evsel->prev_raw_counts->cpu[cpu] = *count;
712 }
713
714 count->val = count->val - tmp.val;
715 count->ena = count->ena - tmp.ena;
716 count->run = count->run - tmp.run;
717}
718
c52b12ed
ACM		 719int __perf_evsel__read_on_cpu(struct perf_evsel *evsel,
720 int cpu, int thread, bool scale)
721{
722 struct perf_counts_values count;
723 size_t nv = scale ? 3 : 1;
724
725 if (FD(evsel, cpu, thread) < 0)
726 return -EINVAL;
727
4eed11d5
ACM		 728 if (evsel->counts == NULL && perf_evsel__alloc_counts(evsel, cpu + 1) < 0)
729 return -ENOMEM;
730
c52b12ed
ACM		 731 if (readn(FD(evsel, cpu, thread), &count, nv * sizeof(u64)) < 0)
732 return -errno;
733
c7a79c47
SE		 734 compute_deltas(evsel, cpu, &count);
735
c52b12ed
ACM		 736 if (scale) {
737 if (count.run == 0)
738 count.val = 0;
739 else if (count.run < count.ena)
740 count.val = (u64)((double)count.val * count.ena / count.run + 0.5);
741 } else
742 count.ena = count.run = 0;
743
744 evsel->counts->cpu[cpu] = count;
745 return 0;
746}
747
748int __perf_evsel__read(struct perf_evsel *evsel,
749 int ncpus, int nthreads, bool scale)
750{
751 size_t nv = scale ? 3 : 1;
752 int cpu, thread;
753 struct perf_counts_values *aggr = &evsel->counts->aggr, count;
754
52bcd994 755 aggr->val = aggr->ena = aggr->run = 0;
c52b12ed
ACM		 756
757 for (cpu = 0; cpu < ncpus; cpu++) {
758 for (thread = 0; thread < nthreads; thread++) {
759 if (FD(evsel, cpu, thread) < 0)
760 continue;
761
762 if (readn(FD(evsel, cpu, thread),
763 &count, nv * sizeof(u64)) < 0)
764 return -errno;
765
766 aggr->val += count.val;
767 if (scale) {
768 aggr->ena += count.ena;
769 aggr->run += count.run;
770 }
771 }
772 }
773
c7a79c47
SE		 774 compute_deltas(evsel, -1, aggr);
775
c52b12ed
ACM		 776 evsel->counts->scaled = 0;
777 if (scale) {
778 if (aggr->run == 0) {
779 evsel->counts->scaled = -1;
780 aggr->val = 0;
781 return 0;
782 }
783
784 if (aggr->run < aggr->ena) {
785 evsel->counts->scaled = 1;
786 aggr->val = (u64)((double)aggr->val * aggr->ena / aggr->run + 0.5);
787 }
788 } else
789 aggr->ena = aggr->run = 0;
790
791 return 0;
792}
48290609 793
6a4bb04c
JO		 794static int get_group_fd(struct perf_evsel *evsel, int cpu, int thread)
795{
796 struct perf_evsel *leader = evsel->leader;
797 int fd;
798
823254ed 799 if (perf_evsel__is_group_leader(evsel))
6a4bb04c
JO		 800 return -1;
801
802 /*
803 * Leader must be already processed/open,
804 * if not it's a bug.
805 */
806 BUG_ON(!leader->fd);
807
808 fd = FD(leader, cpu, thread);
809 BUG_ON(fd == -1);
810
811 return fd;
812}
813
0252208e 814static int __perf_evsel__open(struct perf_evsel *evsel, struct cpu_map *cpus,
6a4bb04c 815 struct thread_map *threads)
48290609 816{
0252208e 817 int cpu, thread;
023695d9 818 unsigned long flags = 0;
727ab04e 819 int pid = -1, err;
48290609 820
0252208e
ACM		 821 if (evsel->fd == NULL &&
822 perf_evsel__alloc_fd(evsel, cpus->nr, threads->nr) < 0)
727ab04e 823 return -ENOMEM;
4eed11d5 824
023695d9
SE		 825 if (evsel->cgrp) {
826 flags = PERF_FLAG_PID_CGROUP;
827 pid = evsel->cgrp->fd;
828 }
829
594ac61a
ACM		 830fallback_missing_features:
831 if (perf_missing_features.exclude_guest)
832 evsel->attr.exclude_guest = evsel->attr.exclude_host = 0;
833retry_sample_id:
834 if (perf_missing_features.sample_id_all)
835 evsel->attr.sample_id_all = 0;
836
86bd5e86 837 for (cpu = 0; cpu < cpus->nr; cpu++) {
9d04f178 838
0252208e 839 for (thread = 0; thread < threads->nr; thread++) {
6a4bb04c 840 int group_fd;
023695d9
SE		 841
842 if (!evsel->cgrp)
843 pid = threads->map[thread];
844
6a4bb04c
JO		 845 group_fd = get_group_fd(evsel, cpu, thread);
846
0252208e 847 FD(evsel, cpu, thread) = sys_perf_event_open(&evsel->attr,
023695d9 848 pid,
f08199d3 849 cpus->map[cpu],
023695d9 850 group_fd, flags);
727ab04e
ACM		 851 if (FD(evsel, cpu, thread) < 0) {
852 err = -errno;
594ac61a 853 goto try_fallback;
727ab04e 854 }
0252208e 855 }
48290609
ACM		 856 }
857
858 return 0;
859
594ac61a
ACM		 860try_fallback:
861 if (err != -EINVAL || cpu > 0 || thread > 0)
862 goto out_close;
863
864 if (!perf_missing_features.exclude_guest &&
865 (evsel->attr.exclude_guest || evsel->attr.exclude_host)) {
866 perf_missing_features.exclude_guest = true;
867 goto fallback_missing_features;
868 } else if (!perf_missing_features.sample_id_all) {
869 perf_missing_features.sample_id_all = true;
870 goto retry_sample_id;
871 }
872
48290609 873out_close:
0252208e
ACM		 874 do {
875 while (--thread >= 0) {
876 close(FD(evsel, cpu, thread));
877 FD(evsel, cpu, thread) = -1;
878 }
879 thread = threads->nr;
880 } while (--cpu >= 0);
727ab04e
ACM		 881 return err;
882}
883
884void perf_evsel__close(struct perf_evsel *evsel, int ncpus, int nthreads)
885{
886 if (evsel->fd == NULL)
887 return;
888
889 perf_evsel__close_fd(evsel, ncpus, nthreads);
890 perf_evsel__free_fd(evsel);
891 evsel->fd = NULL;
48290609
ACM		 892}
893
0252208e
ACM		 894static struct {
895 struct cpu_map map;
896 int cpus[1];
897} empty_cpu_map = {
898 .map.nr = 1,
899 .cpus = { -1, },
900};
901
902static struct {
903 struct thread_map map;
904 int threads[1];
905} empty_thread_map = {
906 .map.nr = 1,
907 .threads = { -1, },
908};
909
f08199d3 910int perf_evsel__open(struct perf_evsel *evsel, struct cpu_map *cpus,
6a4bb04c 911 struct thread_map *threads)
48290609 912{
0252208e
ACM		 913 if (cpus == NULL) {
914 /* Work around old compiler warnings about strict aliasing */
915 cpus = &empty_cpu_map.map;
48290609
ACM		 916 }
917
0252208e
ACM		 918 if (threads == NULL)
919 threads = &empty_thread_map.map;
48290609 920
6a4bb04c 921 return __perf_evsel__open(evsel, cpus, threads);
48290609
ACM		 922}
923
f08199d3 924int perf_evsel__open_per_cpu(struct perf_evsel *evsel,
6a4bb04c 925 struct cpu_map *cpus)
48290609 926{
6a4bb04c 927 return __perf_evsel__open(evsel, cpus, &empty_thread_map.map);
0252208e 928}
48290609 929
f08199d3 930int perf_evsel__open_per_thread(struct perf_evsel *evsel,
6a4bb04c 931 struct thread_map *threads)
0252208e 932{
6a4bb04c 933 return __perf_evsel__open(evsel, &empty_cpu_map.map, threads);
48290609 934}
70082dd9 935
0807d2d8
ACM		 936static int perf_evsel__parse_id_sample(const struct perf_evsel *evsel,
937 const union perf_event *event,
938 struct perf_sample *sample)
d0dd74e8 939{
0807d2d8 940 u64 type = evsel->attr.sample_type;
d0dd74e8 941 const u64 *array = event->sample.array;
0807d2d8 942 bool swapped = evsel->needs_swap;
37073f9e 943 union u64_swap u;
d0dd74e8
ACM		 944
945 array += ((event->header.size -
946 sizeof(event->header)) / sizeof(u64)) - 1;
947
948 if (type & PERF_SAMPLE_CPU) {
37073f9e
JO		 949 u.val64 = *array;
950 if (swapped) {
951 /* undo swap of u64, then swap on individual u32s */
952 u.val64 = bswap_64(u.val64);
953 u.val32[0] = bswap_32(u.val32[0]);
954 }
955
956 sample->cpu = u.val32[0];
d0dd74e8
ACM		 957 array--;
958 }
959
960 if (type & PERF_SAMPLE_STREAM_ID) {
961 sample->stream_id = *array;
962 array--;
963 }
964
965 if (type & PERF_SAMPLE_ID) {
966 sample->id = *array;
967 array--;
968 }
969
970 if (type & PERF_SAMPLE_TIME) {
971 sample->time = *array;
972 array--;
973 }
974
975 if (type & PERF_SAMPLE_TID) {
37073f9e
JO		 976 u.val64 = *array;
977 if (swapped) {
978 /* undo swap of u64, then swap on individual u32s */
979 u.val64 = bswap_64(u.val64);
980 u.val32[0] = bswap_32(u.val32[0]);
981 u.val32[1] = bswap_32(u.val32[1]);
982 }
983
984 sample->pid = u.val32[0];
985 sample->tid = u.val32[1];
d0dd74e8
ACM		 986 }
987
988 return 0;
989}
990
98e1da90
FW		 991static bool sample_overlap(const union perf_event *event,
992 const void *offset, u64 size)
993{
994 const void *base = event;
995
996 if (offset + size > base + event->header.size)
997 return true;
998
999 return false;
1000}
1001
a3f698fe 1002int perf_evsel__parse_sample(struct perf_evsel *evsel, union perf_event *event,
0807d2d8 1003 struct perf_sample *data)
d0dd74e8 1004{
a3f698fe 1005 u64 type = evsel->attr.sample_type;
0f6a3015 1006 u64 regs_user = evsel->attr.sample_regs_user;
0807d2d8 1007 bool swapped = evsel->needs_swap;
d0dd74e8
ACM		 1008 const u64 *array;
1009
936be503
DA		 1010 /*
1011 * used for cross-endian analysis. See git commit 65014ab3
1012 * for why this goofiness is needed.
1013 */
6a11f92e 1014 union u64_swap u;
936be503 1015
f3bda2c9 1016 memset(data, 0, sizeof(*data));
d0dd74e8
ACM		 1017 data->cpu = data->pid = data->tid = -1;
1018 data->stream_id = data->id = data->time = -1ULL;
a4a03fc7 1019 data->period = 1;
d0dd74e8
ACM		 1020
1021 if (event->header.type != PERF_RECORD_SAMPLE) {
a3f698fe 1022 if (!evsel->attr.sample_id_all)
d0dd74e8 1023 return 0;
0807d2d8 1024 return perf_evsel__parse_id_sample(evsel, event, data);
d0dd74e8
ACM		 1025 }
1026
1027 array = event->sample.array;
1028
a3f698fe 1029 if (evsel->sample_size + sizeof(event->header) > event->header.size)
a2854124
FW		 1030 return -EFAULT;
1031
d0dd74e8
ACM		 1032 if (type & PERF_SAMPLE_IP) {
1033 data->ip = event->ip.ip;
1034 array++;
1035 }
1036
1037 if (type & PERF_SAMPLE_TID) {
936be503
DA		 1038 u.val64 = *array;
1039 if (swapped) {
1040 /* undo swap of u64, then swap on individual u32s */
1041 u.val64 = bswap_64(u.val64);
1042 u.val32[0] = bswap_32(u.val32[0]);
1043 u.val32[1] = bswap_32(u.val32[1]);
1044 }
1045
1046 data->pid = u.val32[0];
1047 data->tid = u.val32[1];
d0dd74e8
ACM		 1048 array++;
1049 }
1050
1051 if (type & PERF_SAMPLE_TIME) {
1052 data->time = *array;
1053 array++;
1054 }
1055
7cec0922 1056 data->addr = 0;
d0dd74e8
ACM		 1057 if (type & PERF_SAMPLE_ADDR) {
1058 data->addr = *array;
1059 array++;
1060 }
1061
1062 data->id = -1ULL;
1063 if (type & PERF_SAMPLE_ID) {
1064 data->id = *array;
1065 array++;
1066 }
1067
1068 if (type & PERF_SAMPLE_STREAM_ID) {
1069 data->stream_id = *array;
1070 array++;
1071 }
1072
1073 if (type & PERF_SAMPLE_CPU) {
936be503
DA		 1074
1075 u.val64 = *array;
1076 if (swapped) {
1077 /* undo swap of u64, then swap on individual u32s */
1078 u.val64 = bswap_64(u.val64);
1079 u.val32[0] = bswap_32(u.val32[0]);
1080 }
1081
1082 data->cpu = u.val32[0];
d0dd74e8
ACM		 1083 array++;
1084 }
1085
1086 if (type & PERF_SAMPLE_PERIOD) {
1087 data->period = *array;
1088 array++;
1089 }
1090
1091 if (type & PERF_SAMPLE_READ) {
f9d36996 1092 fprintf(stderr, "PERF_SAMPLE_READ is unsupported for now\n");
d0dd74e8
ACM		 1093 return -1;
1094 }
1095
1096 if (type & PERF_SAMPLE_CALLCHAIN) {
98e1da90
FW		 1097 if (sample_overlap(event, array, sizeof(data->callchain->nr)))
1098 return -EFAULT;
1099
d0dd74e8 1100 data->callchain = (struct ip_callchain *)array;
98e1da90
FW		 1101
1102 if (sample_overlap(event, array, data->callchain->nr))
1103 return -EFAULT;
1104
d0dd74e8
ACM		 1105 array += 1 + data->callchain->nr;
1106 }
1107
1108 if (type & PERF_SAMPLE_RAW) {
8e303f20
JO		 1109 const u64 *pdata;
1110
936be503
DA		 1111 u.val64 = *array;
1112 if (WARN_ONCE(swapped,
1113 "Endianness of raw data not corrected!\n")) {
1114 /* undo swap of u64, then swap on individual u32s */
1115 u.val64 = bswap_64(u.val64);
1116 u.val32[0] = bswap_32(u.val32[0]);
1117 u.val32[1] = bswap_32(u.val32[1]);
1118 }
98e1da90
FW		 1119
1120 if (sample_overlap(event, array, sizeof(u32)))
1121 return -EFAULT;
1122
936be503 1123 data->raw_size = u.val32[0];
8e303f20 1124 pdata = (void *) array + sizeof(u32);
98e1da90 1125
8e303f20 1126 if (sample_overlap(event, pdata, data->raw_size))
98e1da90
FW		 1127 return -EFAULT;
1128
8e303f20 1129 data->raw_data = (void *) pdata;
fa30c964
SE		 1130
1131 array = (void *)array + data->raw_size + sizeof(u32);
d0dd74e8
ACM		 1132 }
1133
b5387528
RAV		 1134 if (type & PERF_SAMPLE_BRANCH_STACK) {
1135 u64 sz;
1136
1137 data->branch_stack = (struct branch_stack *)array;
1138 array++; /* nr */
1139
1140 sz = data->branch_stack->nr * sizeof(struct branch_entry);
1141 sz /= sizeof(u64);
1142 array += sz;
1143 }
0f6a3015
JO		 1144
1145 if (type & PERF_SAMPLE_REGS_USER) {
1146 /* First u64 tells us if we have any regs in sample. */
1147 u64 avail = *array++;
1148
1149 if (avail) {
1150 data->user_regs.regs = (u64 *)array;
1151 array += hweight_long(regs_user);
1152 }
1153 }
1154
1155 if (type & PERF_SAMPLE_STACK_USER) {
1156 u64 size = *array++;
1157
1158 data->user_stack.offset = ((char *)(array - 1)
1159 - (char *) event);
1160
1161 if (!size) {
1162 data->user_stack.size = 0;
1163 } else {
1164 data->user_stack.data = (char *)array;
1165 array += size / sizeof(*array);
1166 data->user_stack.size = *array;
1167 }
1168 }
1169
d0dd74e8
ACM		 1170 return 0;
1171}
74eec26f
AV		 1172
1173int perf_event__synthesize_sample(union perf_event *event, u64 type,
1174 const struct perf_sample *sample,
1175 bool swapped)
1176{
1177 u64 *array;
1178
1179 /*
1180 * used for cross-endian analysis. See git commit 65014ab3
1181 * for why this goofiness is needed.
1182 */
6a11f92e 1183 union u64_swap u;
74eec26f
AV		 1184
1185 array = event->sample.array;
1186
1187 if (type & PERF_SAMPLE_IP) {
1188 event->ip.ip = sample->ip;
1189 array++;
1190 }
1191
1192 if (type & PERF_SAMPLE_TID) {
1193 u.val32[0] = sample->pid;
1194 u.val32[1] = sample->tid;
1195 if (swapped) {
1196 /*
a3f698fe 1197 * Inverse of what is done in perf_evsel__parse_sample
74eec26f
AV		 1198 */
1199 u.val32[0] = bswap_32(u.val32[0]);
1200 u.val32[1] = bswap_32(u.val32[1]);
1201 u.val64 = bswap_64(u.val64);
1202 }
1203
1204 *array = u.val64;
1205 array++;
1206 }
1207
1208 if (type & PERF_SAMPLE_TIME) {
1209 *array = sample->time;
1210 array++;
1211 }
1212
1213 if (type & PERF_SAMPLE_ADDR) {
1214 *array = sample->addr;
1215 array++;
1216 }
1217
1218 if (type & PERF_SAMPLE_ID) {
1219 *array = sample->id;
1220 array++;
1221 }
1222
1223 if (type & PERF_SAMPLE_STREAM_ID) {
1224 *array = sample->stream_id;
1225 array++;
1226 }
1227
1228 if (type & PERF_SAMPLE_CPU) {
1229 u.val32[0] = sample->cpu;
1230 if (swapped) {
1231 /*
a3f698fe 1232 * Inverse of what is done in perf_evsel__parse_sample
74eec26f
AV		 1233 */
1234 u.val32[0] = bswap_32(u.val32[0]);
1235 u.val64 = bswap_64(u.val64);
1236 }
1237 *array = u.val64;
1238 array++;
1239 }
1240
1241 if (type & PERF_SAMPLE_PERIOD) {
1242 *array = sample->period;
1243 array++;
1244 }
1245
1246 return 0;
1247}
5555ded4 1248
efd2b924
ACM		 1249struct format_field *perf_evsel__field(struct perf_evsel *evsel, const char *name)
1250{
1251 return pevent_find_field(evsel->tp_format, name);
1252}
1253
5d2074ea 1254void *perf_evsel__rawptr(struct perf_evsel *evsel, struct perf_sample *sample,
5555ded4
ACM		 1255 const char *name)
1256{
efd2b924 1257 struct format_field *field = perf_evsel__field(evsel, name);
5555ded4
ACM		 1258 int offset;
1259
efd2b924
ACM		 1260 if (!field)
1261 return NULL;
5555ded4
ACM		 1262
1263 offset = field->offset;
1264
1265 if (field->flags & FIELD_IS_DYNAMIC) {
1266 offset = *(int *)(sample->raw_data + field->offset);
1267 offset &= 0xffff;
1268 }
1269
1270 return sample->raw_data + offset;
1271}
1272
1273u64 perf_evsel__intval(struct perf_evsel *evsel, struct perf_sample *sample,
1274 const char *name)
1275{
efd2b924 1276 struct format_field *field = perf_evsel__field(evsel, name);
e6b6f679
ACM		 1277 void *ptr;
1278 u64 value;
5555ded4 1279
efd2b924
ACM		 1280 if (!field)
1281 return 0;
5555ded4 1282
e6b6f679 1283 ptr = sample->raw_data + field->offset;
5555ded4 1284
e6b6f679
ACM		 1285 switch (field->size) {
1286 case 1:
1287 return *(u8 *)ptr;
1288 case 2:
1289 value = *(u16 *)ptr;
1290 break;
1291 case 4:
1292 value = *(u32 *)ptr;
1293 break;
1294 case 8:
1295 value = *(u64 *)ptr;
1296 break;
1297 default:
1298 return 0;
1299 }
1300
1301 if (!evsel->needs_swap)
1302 return value;
1303
1304 switch (field->size) {
1305 case 2:
1306 return bswap_16(value);
1307 case 4:
1308 return bswap_32(value);
1309 case 8:
1310 return bswap_64(value);
1311 default:
1312 return 0;
1313 }
1314
1315 return 0;
5555ded4 1316}
0698aedd
ACM		 1317
1318static int comma_fprintf(FILE *fp, bool *first, const char *fmt, ...)
1319{
1320 va_list args;
1321 int ret = 0;
1322
1323 if (!*first) {
1324 ret += fprintf(fp, ",");
1325 } else {
1326 ret += fprintf(fp, ":");
1327 *first = false;
1328 }
1329
1330 va_start(args, fmt);
1331 ret += vfprintf(fp, fmt, args);
1332 va_end(args);
1333 return ret;
1334}
1335
1336static int __if_fprintf(FILE *fp, bool *first, const char *field, u64 value)
1337{
1338 if (value == 0)
1339 return 0;
1340
1341 return comma_fprintf(fp, first, " %s: %" PRIu64, field, value);
1342}
1343
1344#define if_print(field) printed += __if_fprintf(fp, &first, #field, evsel->attr.field)
1345
c79a4393
ACM		 1346struct bit_names {
1347 int bit;
1348 const char *name;
1349};
1350
1351static int bits__fprintf(FILE *fp, const char *field, u64 value,
1352 struct bit_names *bits, bool *first)
1353{
1354 int i = 0, printed = comma_fprintf(fp, first, " %s: ", field);
1355 bool first_bit = true;
1356
1357 do {
1358 if (value & bits[i].bit) {
1359 printed += fprintf(fp, "%s%s", first_bit ? "" : "|", bits[i].name);
1360 first_bit = false;
1361 }
1362 } while (bits[++i].name != NULL);
1363
1364 return printed;
1365}
1366
1367static int sample_type__fprintf(FILE *fp, bool *first, u64 value)
1368{
1369#define bit_name(n) { PERF_SAMPLE_##n, #n }
1370 struct bit_names bits[] = {
1371 bit_name(IP), bit_name(TID), bit_name(TIME), bit_name(ADDR),
1372 bit_name(READ), bit_name(CALLCHAIN), bit_name(ID), bit_name(CPU),
1373 bit_name(PERIOD), bit_name(STREAM_ID), bit_name(RAW),
1374 bit_name(BRANCH_STACK), bit_name(REGS_USER), bit_name(STACK_USER),
1375 { .name = NULL, }
1376 };
1377#undef bit_name
1378 return bits__fprintf(fp, "sample_type", value, bits, first);
1379}
1380
1381static int read_format__fprintf(FILE *fp, bool *first, u64 value)
1382{
1383#define bit_name(n) { PERF_FORMAT_##n, #n }
1384 struct bit_names bits[] = {
1385 bit_name(TOTAL_TIME_ENABLED), bit_name(TOTAL_TIME_RUNNING),
1386 bit_name(ID), bit_name(GROUP),
1387 { .name = NULL, }
1388 };
1389#undef bit_name
1390 return bits__fprintf(fp, "read_format", value, bits, first);
1391}
1392
0698aedd
ACM		 1393int perf_evsel__fprintf(struct perf_evsel *evsel,
1394 struct perf_attr_details *details, FILE *fp)
1395{
1396 bool first = true;
e6ab07d0
NK		 1397 int printed = 0;
1398
e35ef355 1399 if (details->event_group) {
e6ab07d0
NK		 1400 struct perf_evsel *pos;
1401
1402 if (!perf_evsel__is_group_leader(evsel))
1403 return 0;
1404
1405 if (evsel->nr_members > 1)
1406 printed += fprintf(fp, "%s{", evsel->group_name ?: "");
1407
1408 printed += fprintf(fp, "%s", perf_evsel__name(evsel));
1409 for_each_group_member(pos, evsel)
1410 printed += fprintf(fp, ",%s", perf_evsel__name(pos));
1411
1412 if (evsel->nr_members > 1)
1413 printed += fprintf(fp, "}");
1414 goto out;
1415 }
1416
1417 printed += fprintf(fp, "%s", perf_evsel__name(evsel));
0698aedd
ACM		 1418
1419 if (details->verbose || details->freq) {
1420 printed += comma_fprintf(fp, &first, " sample_freq=%" PRIu64,
1421 (u64)evsel->attr.sample_freq);
1422 }
1423
1424 if (details->verbose) {
1425 if_print(type);
1426 if_print(config);
1427 if_print(config1);
1428 if_print(config2);
1429 if_print(size);
c79a4393
ACM		 1430 printed += sample_type__fprintf(fp, &first, evsel->attr.sample_type);
1431 if (evsel->attr.read_format)
1432 printed += read_format__fprintf(fp, &first, evsel->attr.read_format);
0698aedd
ACM		 1433 if_print(disabled);
1434 if_print(inherit);
1435 if_print(pinned);
1436 if_print(exclusive);
1437 if_print(exclude_user);
1438 if_print(exclude_kernel);
1439 if_print(exclude_hv);
1440 if_print(exclude_idle);
1441 if_print(mmap);
1442 if_print(comm);
1443 if_print(freq);
1444 if_print(inherit_stat);
1445 if_print(enable_on_exec);
1446 if_print(task);
1447 if_print(watermark);
1448 if_print(precise_ip);
1449 if_print(mmap_data);
1450 if_print(sample_id_all);
1451 if_print(exclude_host);
1452 if_print(exclude_guest);
1453 if_print(__reserved_1);
1454 if_print(wakeup_events);
1455 if_print(bp_type);
1456 if_print(branch_sample_type);
1457 }
e6ab07d0 1458out:
0698aedd
ACM		 1459 fputc('\n', fp);
1460 return ++printed;
1461}
c0a54341
ACM		 1462
1463bool perf_evsel__fallback(struct perf_evsel *evsel, int err,
1464 char *msg, size_t msgsize)
1465{
1466 if ((err == ENOENT || err == ENXIO) &&
1467 evsel->attr.type == PERF_TYPE_HARDWARE &&
1468 evsel->attr.config == PERF_COUNT_HW_CPU_CYCLES) {
1469 /*
1470 * If it's cycles then fall back to hrtimer based
1471 * cpu-clock-tick sw counter, which is always available even if
1472 * no PMU support.
1473 *
1474 * PPC returns ENXIO until 2.6.37 (behavior changed with commit
1475 * b0a873e).
1476 */
1477 scnprintf(msg, msgsize, "%s",
1478"The cycles event is not supported, trying to fall back to cpu-clock-ticks");
1479
1480 evsel->attr.type = PERF_TYPE_SOFTWARE;
1481 evsel->attr.config = PERF_COUNT_SW_CPU_CLOCK;
1482
1483 free(evsel->name);
1484 evsel->name = NULL;
1485 return true;
1486 }
1487
1488 return false;
1489}
56e52e85
ACM		 1490
1491int perf_evsel__open_strerror(struct perf_evsel *evsel,
1492 struct perf_target *target,
1493 int err, char *msg, size_t size)
1494{
1495 switch (err) {
1496 case EPERM:
1497 case EACCES:
1498 return scnprintf(msg, size, "%s",
1499 "You may not have permission to collect %sstats.\n"
1500 "Consider tweaking /proc/sys/kernel/perf_event_paranoid:\n"
1501 " -1 - Not paranoid at all\n"
1502 " 0 - Disallow raw tracepoint access for unpriv\n"
1503 " 1 - Disallow cpu events for unpriv\n"
1504 " 2 - Disallow kernel profiling for unpriv",
1505 target->system_wide ? "system-wide " : "");
1506 case ENOENT:
1507 return scnprintf(msg, size, "The %s event is not supported.",
1508 perf_evsel__name(evsel));
1509 case EMFILE:
1510 return scnprintf(msg, size, "%s",
1511 "Too many events are opened.\n"
1512 "Try again after reducing the number of events.");
1513 case ENODEV:
1514 if (target->cpu_list)
1515 return scnprintf(msg, size, "%s",
1516 "No such device - did you specify an out-of-range profile CPU?\n");
1517 break;
1518 case EOPNOTSUPP:
1519 if (evsel->attr.precise_ip)
1520 return scnprintf(msg, size, "%s",
1521 "\'precise\' request may not be supported. Try removing 'p' modifier.");
1522#if defined(__i386__) || defined(__x86_64__)
1523 if (evsel->attr.type == PERF_TYPE_HARDWARE)
1524 return scnprintf(msg, size, "%s",
1525 "No hardware sampling interrupt available.\n"
1526 "No APIC? If so then you can boot the kernel with the \"lapic\" boot parameter to force-enable it.");
1527#endif
1528 break;
1529 default:
1530 break;
1531 }
1532
1533 return scnprintf(msg, size,
1534 "The sys_perf_event_open() syscall returned with %d (%s) for event (%s). \n"
1535 "/bin/dmesg may provide additional information.\n"
1536 "No CONFIG_PERF_EVENTS=y kernel support configured?\n",
1537 err, strerror(err), perf_evsel__name(evsel));
1538}
Linux 6.x block layer and io_uring tree(s)