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perf script: Fix named threads support
[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>
85c66be1 12#include <lk/debugfs.h>
4e319027
RR		 13#include <traceevent/event-parse.h>
14#include <linux/hw_breakpoint.h>
15#include <linux/perf_event.h>
16#include "asm/bug.h"
69aad6f1 17#include "evsel.h"
70082dd9 18#include "evlist.h"
69aad6f1 19#include "util.h"
86bd5e86 20#include "cpumap.h"
fd78260b 21#include "thread_map.h"
12864b31 22#include "target.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
7cab84e8 127 n = read(fd, bf + size, alloc_size - size);
efd2b924
ACM		 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
ccf49bfc
SE		 557 if (opts->sample_address)
558 attr->sample_type |= PERF_SAMPLE_DATA_SRC;
559
0f82ebc4
ACM		 560 if (opts->no_delay) {
561 attr->watermark = 0;
562 attr->wakeup_events = 1;
563 }
bdfebd84 564 if (opts->branch_stack) {
7be5ebe8 565 perf_evsel__set_sample_bit(evsel, BRANCH_STACK);
bdfebd84
RAV		 566 attr->branch_sample_type = opts->branch_stack;
567 }
0f82ebc4 568
05484298
AK		 569 if (opts->sample_weight)
570 attr->sample_type |= PERF_SAMPLE_WEIGHT;
571
0f82ebc4
ACM		 572 attr->mmap = track;
573 attr->comm = track;
574
774cb499
JO		 575 /*
576 * XXX see the function comment above
577 *
578 * Disabling only independent events or group leaders,
579 * keeping group members enabled.
580 */
823254ed 581 if (perf_evsel__is_group_leader(evsel))
774cb499
JO		 582 attr->disabled = 1;
583
584 /*
585 * Setting enable_on_exec for independent events and
586 * group leaders for traced executed by perf.
587 */
823254ed 588 if (perf_target__none(&opts->target) && perf_evsel__is_group_leader(evsel))
0f82ebc4 589 attr->enable_on_exec = 1;
0f82ebc4
ACM		 590}
591
69aad6f1
ACM		 592int perf_evsel__alloc_fd(struct perf_evsel *evsel, int ncpus, int nthreads)
593{
4af4c955 594 int cpu, thread;
69aad6f1 595 evsel->fd = xyarray__new(ncpus, nthreads, sizeof(int));
4af4c955
DA		 596
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
69aad6f1
ACM		 605 return evsel->fd != NULL ? 0 : -ENOMEM;
606}
607
745cefc5
ACM		 608int 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
70db7533
ACM		 626int perf_evsel__alloc_id(struct perf_evsel *evsel, int ncpus, int nthreads)
627{
a91e5431
ACM		 628 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;
70db7533
ACM		 640}
641
a7e191c3
FD		 642void 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
c52b12ed
ACM		 648int 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
69aad6f1
ACM		 655void perf_evsel__free_fd(struct perf_evsel *evsel)
656{
657 xyarray__delete(evsel->fd);
658 evsel->fd = NULL;
659}
660
70db7533
ACM		 661void perf_evsel__free_id(struct perf_evsel *evsel)
662{
a91e5431
ACM		 663 xyarray__delete(evsel->sample_id);
664 evsel->sample_id = NULL;
665 free(evsel->id);
70db7533
ACM		 666 evsel->id = NULL;
667}
668
c52b12ed
ACM		 669void 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
43f8e76e
NK		 680void perf_evsel__free_counts(struct perf_evsel *evsel)
681{
682 free(evsel->counts);
683}
684
ef1d1af2 685void perf_evsel__exit(struct perf_evsel *evsel)
69aad6f1
ACM		 686{
687 assert(list_empty(&evsel->node));
736b05a0
NK		 688 perf_evsel__free_fd(evsel);
689 perf_evsel__free_id(evsel);
ef1d1af2
ACM		 690}
691
692void perf_evsel__delete(struct perf_evsel *evsel)
693{
694 perf_evsel__exit(evsel);
023695d9 695 close_cgroup(evsel->cgrp);
6a4bb04c 696 free(evsel->group_name);
e48ffe2b 697 if (evsel->tp_format)
efd2b924 698 pevent_free_format(evsel->tp_format);
f0c55bcf 699 free(evsel->name);
69aad6f1
ACM		 700 free(evsel);
701}
c52b12ed 702
c7a79c47
SE		 703static 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
c52b12ed
ACM		 725int __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
4eed11d5
ACM		 734 if (evsel->counts == NULL && perf_evsel__alloc_counts(evsel, cpu + 1) < 0)
735 return -ENOMEM;
736
c52b12ed
ACM		 737 if (readn(FD(evsel, cpu, thread), &count, nv * sizeof(u64)) < 0)
738 return -errno;
739
c7a79c47
SE		 740 compute_deltas(evsel, cpu, &count);
741
c52b12ed
ACM		 742 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
52bcd994 761 aggr->val = aggr->ena = aggr->run = 0;
c52b12ed
ACM		 762
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
c7a79c47
SE		 780 compute_deltas(evsel, -1, aggr);
781
c52b12ed
ACM		 782 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}
48290609 799
6a4bb04c
JO		 800static int get_group_fd(struct perf_evsel *evsel, int cpu, int thread)
801{
802 struct perf_evsel *leader = evsel->leader;
803 int fd;
804
823254ed 805 if (perf_evsel__is_group_leader(evsel))
6a4bb04c
JO		 806 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
0252208e 820static int __perf_evsel__open(struct perf_evsel *evsel, struct cpu_map *cpus,
6a4bb04c 821 struct thread_map *threads)
48290609 822{
0252208e 823 int cpu, thread;
023695d9 824 unsigned long flags = 0;
727ab04e 825 int pid = -1, err;
48290609 826
0252208e
ACM		 827 if (evsel->fd == NULL &&
828 perf_evsel__alloc_fd(evsel, cpus->nr, threads->nr) < 0)
727ab04e 829 return -ENOMEM;
4eed11d5 830
023695d9
SE		 831 if (evsel->cgrp) {
832 flags = PERF_FLAG_PID_CGROUP;
833 pid = evsel->cgrp->fd;
834 }
835
594ac61a
ACM		 836fallback_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
86bd5e86 843 for (cpu = 0; cpu < cpus->nr; cpu++) {
9d04f178 844
0252208e 845 for (thread = 0; thread < threads->nr; thread++) {
6a4bb04c 846 int group_fd;
023695d9
SE		 847
848 if (!evsel->cgrp)
849 pid = threads->map[thread];
850
6a4bb04c
JO		 851 group_fd = get_group_fd(evsel, cpu, thread);
852
0252208e 853 FD(evsel, cpu, thread) = sys_perf_event_open(&evsel->attr,
023695d9 854 pid,
f08199d3 855 cpus->map[cpu],
023695d9 856 group_fd, flags);
727ab04e
ACM		 857 if (FD(evsel, cpu, thread) < 0) {
858 err = -errno;
594ac61a 859 goto try_fallback;
727ab04e 860 }
0252208e 861 }
48290609
ACM		 862 }
863
864 return 0;
865
594ac61a
ACM		 866try_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
48290609 879out_close:
0252208e
ACM		 880 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);
727ab04e
ACM		 887 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;
48290609
ACM		 898}
899
0252208e
ACM		 900static 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
f08199d3 916int perf_evsel__open(struct perf_evsel *evsel, struct cpu_map *cpus,
6a4bb04c 917 struct thread_map *threads)
48290609 918{
0252208e
ACM		 919 if (cpus == NULL) {
920 /* Work around old compiler warnings about strict aliasing */
921 cpus = &empty_cpu_map.map;
48290609
ACM		 922 }
923
0252208e
ACM		 924 if (threads == NULL)
925 threads = &empty_thread_map.map;
48290609 926
6a4bb04c 927 return __perf_evsel__open(evsel, cpus, threads);
48290609
ACM		 928}
929
f08199d3 930int perf_evsel__open_per_cpu(struct perf_evsel *evsel,
6a4bb04c 931 struct cpu_map *cpus)
48290609 932{
6a4bb04c 933 return __perf_evsel__open(evsel, cpus, &empty_thread_map.map);
0252208e 934}
48290609 935
f08199d3 936int perf_evsel__open_per_thread(struct perf_evsel *evsel,
6a4bb04c 937 struct thread_map *threads)
0252208e 938{
6a4bb04c 939 return __perf_evsel__open(evsel, &empty_cpu_map.map, threads);
48290609 940}
70082dd9 941
0807d2d8
ACM		 942static int perf_evsel__parse_id_sample(const struct perf_evsel *evsel,
943 const union perf_event *event,
944 struct perf_sample *sample)
d0dd74e8 945{
0807d2d8 946 u64 type = evsel->attr.sample_type;
d0dd74e8 947 const u64 *array = event->sample.array;
0807d2d8 948 bool swapped = evsel->needs_swap;
37073f9e 949 union u64_swap u;
d0dd74e8
ACM		 950
951 array += ((event->header.size -
952 sizeof(event->header)) / sizeof(u64)) - 1;
953
954 if (type & PERF_SAMPLE_CPU) {
37073f9e
JO		 955 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];
d0dd74e8
ACM		 963 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) {
37073f9e
JO		 982 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];
d0dd74e8
ACM		 992 }
993
994 return 0;
995}
996
98e1da90
FW		 997static 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
a3f698fe 1008int perf_evsel__parse_sample(struct perf_evsel *evsel, union perf_event *event,
0807d2d8 1009 struct perf_sample *data)
d0dd74e8 1010{
a3f698fe 1011 u64 type = evsel->attr.sample_type;
0f6a3015 1012 u64 regs_user = evsel->attr.sample_regs_user;
0807d2d8 1013 bool swapped = evsel->needs_swap;
d0dd74e8
ACM		 1014 const u64 *array;
1015
936be503
DA		 1016 /*
1017 * used for cross-endian analysis. See git commit 65014ab3
1018 * for why this goofiness is needed.
1019 */
6a11f92e 1020 union u64_swap u;
936be503 1021
f3bda2c9 1022 memset(data, 0, sizeof(*data));
d0dd74e8
ACM		 1023 data->cpu = data->pid = data->tid = -1;
1024 data->stream_id = data->id = data->time = -1ULL;
a4a03fc7 1025 data->period = 1;
05484298 1026 data->weight = 0;
d0dd74e8
ACM		 1027
1028 if (event->header.type != PERF_RECORD_SAMPLE) {
a3f698fe 1029 if (!evsel->attr.sample_id_all)
d0dd74e8 1030 return 0;
0807d2d8 1031 return perf_evsel__parse_id_sample(evsel, event, data);
d0dd74e8
ACM		 1032 }
1033
1034 array = event->sample.array;
1035
a3f698fe 1036 if (evsel->sample_size + sizeof(event->header) > event->header.size)
a2854124
FW		 1037 return -EFAULT;
1038
d0dd74e8
ACM		 1039 if (type & PERF_SAMPLE_IP) {
1040 data->ip = event->ip.ip;
1041 array++;
1042 }
1043
1044 if (type & PERF_SAMPLE_TID) {
936be503
DA		 1045 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];
d0dd74e8
ACM		 1055 array++;
1056 }
1057
1058 if (type & PERF_SAMPLE_TIME) {
1059 data->time = *array;
1060 array++;
1061 }
1062
7cec0922 1063 data->addr = 0;
d0dd74e8
ACM		 1064 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) {
936be503
DA		 1081
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];
d0dd74e8
ACM		 1090 array++;
1091 }
1092
1093 if (type & PERF_SAMPLE_PERIOD) {
1094 data->period = *array;
1095 array++;
1096 }
1097
1098 if (type & PERF_SAMPLE_READ) {
f9d36996 1099 fprintf(stderr, "PERF_SAMPLE_READ is unsupported for now\n");
d0dd74e8
ACM		 1100 return -1;
1101 }
1102
1103 if (type & PERF_SAMPLE_CALLCHAIN) {
98e1da90
FW		 1104 if (sample_overlap(event, array, sizeof(data->callchain->nr)))
1105 return -EFAULT;
1106
d0dd74e8 1107 data->callchain = (struct ip_callchain *)array;
98e1da90
FW		 1108
1109 if (sample_overlap(event, array, data->callchain->nr))
1110 return -EFAULT;
1111
d0dd74e8
ACM		 1112 array += 1 + data->callchain->nr;
1113 }
1114
1115 if (type & PERF_SAMPLE_RAW) {
8e303f20
JO		 1116 const u64 *pdata;
1117
936be503
DA		 1118 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 }
98e1da90
FW		 1126
1127 if (sample_overlap(event, array, sizeof(u32)))
1128 return -EFAULT;
1129
936be503 1130 data->raw_size = u.val32[0];
8e303f20 1131 pdata = (void *) array + sizeof(u32);
98e1da90 1132
8e303f20 1133 if (sample_overlap(event, pdata, data->raw_size))
98e1da90
FW		 1134 return -EFAULT;
1135
8e303f20 1136 data->raw_data = (void *) pdata;
fa30c964
SE		 1137
1138 array = (void *)array + data->raw_size + sizeof(u32);
d0dd74e8
ACM		 1139 }
1140
b5387528
RAV		 1141 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 }
0f6a3015
JO		 1151
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);
54bd2692 1173 data->user_stack.size = *array++;
0f6a3015
JO		 1174 }
1175 }
1176
05484298
AK		 1177 data->weight = 0;
1178 if (type & PERF_SAMPLE_WEIGHT) {
1179 data->weight = *array;
1180 array++;
1181 }
1182
98a3b32c
SE		 1183 data->data_src = PERF_MEM_DATA_SRC_NONE;
1184 if (type & PERF_SAMPLE_DATA_SRC) {
1185 data->data_src = *array;
1186 array++;
1187 }
1188
d0dd74e8
ACM		 1189 return 0;
1190}
74eec26f
AV		 1191
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 */
6a11f92e 1202 union u64_swap u;
74eec26f
AV		 1203
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 /*
a3f698fe 1216 * Inverse of what is done in perf_evsel__parse_sample
74eec26f
AV		 1217 */
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 /*
a3f698fe 1251 * Inverse of what is done in perf_evsel__parse_sample
74eec26f
AV		 1252 */
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}
5555ded4 1267
efd2b924
ACM		 1268struct format_field *perf_evsel__field(struct perf_evsel *evsel, const char *name)
1269{
1270 return pevent_find_field(evsel->tp_format, name);
1271}
1272
5d2074ea 1273void *perf_evsel__rawptr(struct perf_evsel *evsel, struct perf_sample *sample,
5555ded4
ACM		 1274 const char *name)
1275{
efd2b924 1276 struct format_field *field = perf_evsel__field(evsel, name);
5555ded4
ACM		 1277 int offset;
1278
efd2b924
ACM		 1279 if (!field)
1280 return NULL;
5555ded4
ACM		 1281
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{
efd2b924 1295 struct format_field *field = perf_evsel__field(evsel, name);
e6b6f679
ACM		 1296 void *ptr;
1297 u64 value;
5555ded4 1298
efd2b924
ACM		 1299 if (!field)
1300 return 0;
5555ded4 1301
e6b6f679 1302 ptr = sample->raw_data + field->offset;
5555ded4 1303
e6b6f679
ACM		 1304 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;
5555ded4 1335}
0698aedd
ACM		 1336
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
c79a4393
ACM		 1365struct 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
0698aedd
ACM		 1412int perf_evsel__fprintf(struct perf_evsel *evsel,
1413 struct perf_attr_details *details, FILE *fp)
1414{
1415 bool first = true;
e6ab07d0
NK		 1416 int printed = 0;
1417
e35ef355 1418 if (details->event_group) {
e6ab07d0
NK		 1419 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));
0698aedd
ACM		 1437
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);
c79a4393
ACM		 1449 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);
0698aedd
ACM		 1452 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 }
e6ab07d0 1477out:
0698aedd
ACM		 1478 fputc('\n', fp);
1479 return ++printed;
1480}
c0a54341
ACM		 1481
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}
56e52e85
ACM		 1509
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:
b69e63a4 1517 return scnprintf(msg, size,
56e52e85
ACM		 1518 "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}
Linux 6.x block layer and io_uring tree(s)