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perf thread_map: Add thread_map user level event
[thirdparty/linux.git] / tools / perf / util / session.c
1 #include <linux/kernel.h>
2 #include <traceevent/event-parse.h>
3
4 #include <byteswap.h>
5 #include <unistd.h>
6 #include <sys/types.h>
7 #include <sys/mman.h>
8
9 #include "evlist.h"
10 #include "evsel.h"
11 #include "session.h"
12 #include "tool.h"
13 #include "sort.h"
14 #include "util.h"
15 #include "cpumap.h"
16 #include "perf_regs.h"
17 #include "asm/bug.h"
18 #include "auxtrace.h"
19 #include "thread-stack.h"
20
21 static int perf_session__deliver_event(struct perf_session *session,
22 union perf_event *event,
23 struct perf_sample *sample,
24 struct perf_tool *tool,
25 u64 file_offset);
26
27 static int perf_session__open(struct perf_session *session)
28 {
29 struct perf_data_file *file = session->file;
30
31 if (perf_session__read_header(session) < 0) {
32 pr_err("incompatible file format (rerun with -v to learn more)\n");
33 return -1;
34 }
35
36 if (perf_data_file__is_pipe(file))
37 return 0;
38
39 if (!perf_evlist__valid_sample_type(session->evlist)) {
40 pr_err("non matching sample_type\n");
41 return -1;
42 }
43
44 if (!perf_evlist__valid_sample_id_all(session->evlist)) {
45 pr_err("non matching sample_id_all\n");
46 return -1;
47 }
48
49 if (!perf_evlist__valid_read_format(session->evlist)) {
50 pr_err("non matching read_format\n");
51 return -1;
52 }
53
54 return 0;
55 }
56
57 void perf_session__set_id_hdr_size(struct perf_session *session)
58 {
59 u16 id_hdr_size = perf_evlist__id_hdr_size(session->evlist);
60
61 machines__set_id_hdr_size(&session->machines, id_hdr_size);
62 }
63
64 int perf_session__create_kernel_maps(struct perf_session *session)
65 {
66 int ret = machine__create_kernel_maps(&session->machines.host);
67
68 if (ret >= 0)
69 ret = machines__create_guest_kernel_maps(&session->machines);
70 return ret;
71 }
72
73 static void perf_session__destroy_kernel_maps(struct perf_session *session)
74 {
75 machines__destroy_kernel_maps(&session->machines);
76 }
77
78 static bool perf_session__has_comm_exec(struct perf_session *session)
79 {
80 struct perf_evsel *evsel;
81
82 evlist__for_each(session->evlist, evsel) {
83 if (evsel->attr.comm_exec)
84 return true;
85 }
86
87 return false;
88 }
89
90 static void perf_session__set_comm_exec(struct perf_session *session)
91 {
92 bool comm_exec = perf_session__has_comm_exec(session);
93
94 machines__set_comm_exec(&session->machines, comm_exec);
95 }
96
97 static int ordered_events__deliver_event(struct ordered_events *oe,
98 struct ordered_event *event)
99 {
100 struct perf_sample sample;
101 struct perf_session *session = container_of(oe, struct perf_session,
102 ordered_events);
103 int ret = perf_evlist__parse_sample(session->evlist, event->event, &sample);
104
105 if (ret) {
106 pr_err("Can't parse sample, err = %d\n", ret);
107 return ret;
108 }
109
110 return perf_session__deliver_event(session, event->event, &sample,
111 session->tool, event->file_offset);
112 }
113
114 struct perf_session *perf_session__new(struct perf_data_file *file,
115 bool repipe, struct perf_tool *tool)
116 {
117 struct perf_session *session = zalloc(sizeof(*session));
118
119 if (!session)
120 goto out;
121
122 session->repipe = repipe;
123 session->tool = tool;
124 INIT_LIST_HEAD(&session->auxtrace_index);
125 machines__init(&session->machines);
126 ordered_events__init(&session->ordered_events, ordered_events__deliver_event);
127
128 if (file) {
129 if (perf_data_file__open(file))
130 goto out_delete;
131
132 session->file = file;
133
134 if (perf_data_file__is_read(file)) {
135 if (perf_session__open(session) < 0)
136 goto out_close;
137
138 perf_session__set_id_hdr_size(session);
139 perf_session__set_comm_exec(session);
140 }
141 } else {
142 session->machines.host.env = &perf_env;
143 }
144
145 if (!file || perf_data_file__is_write(file)) {
146 /*
147 * In O_RDONLY mode this will be performed when reading the
148 * kernel MMAP event, in perf_event__process_mmap().
149 */
150 if (perf_session__create_kernel_maps(session) < 0)
151 pr_warning("Cannot read kernel map\n");
152 }
153
154 if (tool && tool->ordering_requires_timestamps &&
155 tool->ordered_events && !perf_evlist__sample_id_all(session->evlist)) {
156 dump_printf("WARNING: No sample_id_all support, falling back to unordered processing\n");
157 tool->ordered_events = false;
158 }
159
160 return session;
161
162 out_close:
163 perf_data_file__close(file);
164 out_delete:
165 perf_session__delete(session);
166 out:
167 return NULL;
168 }
169
170 static void perf_session__delete_threads(struct perf_session *session)
171 {
172 machine__delete_threads(&session->machines.host);
173 }
174
175 void perf_session__delete(struct perf_session *session)
176 {
177 auxtrace__free(session);
178 auxtrace_index__free(&session->auxtrace_index);
179 perf_session__destroy_kernel_maps(session);
180 perf_session__delete_threads(session);
181 perf_env__exit(&session->header.env);
182 machines__exit(&session->machines);
183 if (session->file)
184 perf_data_file__close(session->file);
185 free(session);
186 }
187
188 static int process_event_synth_tracing_data_stub(struct perf_tool *tool
189 __maybe_unused,
190 union perf_event *event
191 __maybe_unused,
192 struct perf_session *session
193 __maybe_unused)
194 {
195 dump_printf(": unhandled!\n");
196 return 0;
197 }
198
199 static int process_event_synth_attr_stub(struct perf_tool *tool __maybe_unused,
200 union perf_event *event __maybe_unused,
201 struct perf_evlist **pevlist
202 __maybe_unused)
203 {
204 dump_printf(": unhandled!\n");
205 return 0;
206 }
207
208 static int process_event_sample_stub(struct perf_tool *tool __maybe_unused,
209 union perf_event *event __maybe_unused,
210 struct perf_sample *sample __maybe_unused,
211 struct perf_evsel *evsel __maybe_unused,
212 struct machine *machine __maybe_unused)
213 {
214 dump_printf(": unhandled!\n");
215 return 0;
216 }
217
218 static int process_event_stub(struct perf_tool *tool __maybe_unused,
219 union perf_event *event __maybe_unused,
220 struct perf_sample *sample __maybe_unused,
221 struct machine *machine __maybe_unused)
222 {
223 dump_printf(": unhandled!\n");
224 return 0;
225 }
226
227 static int process_build_id_stub(struct perf_tool *tool __maybe_unused,
228 union perf_event *event __maybe_unused,
229 struct perf_session *session __maybe_unused)
230 {
231 dump_printf(": unhandled!\n");
232 return 0;
233 }
234
235 static int process_finished_round_stub(struct perf_tool *tool __maybe_unused,
236 union perf_event *event __maybe_unused,
237 struct ordered_events *oe __maybe_unused)
238 {
239 dump_printf(": unhandled!\n");
240 return 0;
241 }
242
243 static int process_finished_round(struct perf_tool *tool,
244 union perf_event *event,
245 struct ordered_events *oe);
246
247 static int process_id_index_stub(struct perf_tool *tool __maybe_unused,
248 union perf_event *event __maybe_unused,
249 struct perf_session *perf_session
250 __maybe_unused)
251 {
252 dump_printf(": unhandled!\n");
253 return 0;
254 }
255
256 static int process_event_auxtrace_info_stub(struct perf_tool *tool __maybe_unused,
257 union perf_event *event __maybe_unused,
258 struct perf_session *session __maybe_unused)
259 {
260 dump_printf(": unhandled!\n");
261 return 0;
262 }
263
264 static int skipn(int fd, off_t n)
265 {
266 char buf[4096];
267 ssize_t ret;
268
269 while (n > 0) {
270 ret = read(fd, buf, min(n, (off_t)sizeof(buf)));
271 if (ret <= 0)
272 return ret;
273 n -= ret;
274 }
275
276 return 0;
277 }
278
279 static s64 process_event_auxtrace_stub(struct perf_tool *tool __maybe_unused,
280 union perf_event *event,
281 struct perf_session *session
282 __maybe_unused)
283 {
284 dump_printf(": unhandled!\n");
285 if (perf_data_file__is_pipe(session->file))
286 skipn(perf_data_file__fd(session->file), event->auxtrace.size);
287 return event->auxtrace.size;
288 }
289
290 static
291 int process_event_auxtrace_error_stub(struct perf_tool *tool __maybe_unused,
292 union perf_event *event __maybe_unused,
293 struct perf_session *session __maybe_unused)
294 {
295 dump_printf(": unhandled!\n");
296 return 0;
297 }
298
299
300 static
301 int process_event_thread_map_stub(struct perf_tool *tool __maybe_unused,
302 union perf_event *event __maybe_unused,
303 struct perf_session *session __maybe_unused)
304 {
305 dump_printf(": unhandled!\n");
306 return 0;
307 }
308
309 void perf_tool__fill_defaults(struct perf_tool *tool)
310 {
311 if (tool->sample == NULL)
312 tool->sample = process_event_sample_stub;
313 if (tool->mmap == NULL)
314 tool->mmap = process_event_stub;
315 if (tool->mmap2 == NULL)
316 tool->mmap2 = process_event_stub;
317 if (tool->comm == NULL)
318 tool->comm = process_event_stub;
319 if (tool->fork == NULL)
320 tool->fork = process_event_stub;
321 if (tool->exit == NULL)
322 tool->exit = process_event_stub;
323 if (tool->lost == NULL)
324 tool->lost = perf_event__process_lost;
325 if (tool->lost_samples == NULL)
326 tool->lost_samples = perf_event__process_lost_samples;
327 if (tool->aux == NULL)
328 tool->aux = perf_event__process_aux;
329 if (tool->itrace_start == NULL)
330 tool->itrace_start = perf_event__process_itrace_start;
331 if (tool->context_switch == NULL)
332 tool->context_switch = perf_event__process_switch;
333 if (tool->read == NULL)
334 tool->read = process_event_sample_stub;
335 if (tool->throttle == NULL)
336 tool->throttle = process_event_stub;
337 if (tool->unthrottle == NULL)
338 tool->unthrottle = process_event_stub;
339 if (tool->attr == NULL)
340 tool->attr = process_event_synth_attr_stub;
341 if (tool->tracing_data == NULL)
342 tool->tracing_data = process_event_synth_tracing_data_stub;
343 if (tool->build_id == NULL)
344 tool->build_id = process_build_id_stub;
345 if (tool->finished_round == NULL) {
346 if (tool->ordered_events)
347 tool->finished_round = process_finished_round;
348 else
349 tool->finished_round = process_finished_round_stub;
350 }
351 if (tool->id_index == NULL)
352 tool->id_index = process_id_index_stub;
353 if (tool->auxtrace_info == NULL)
354 tool->auxtrace_info = process_event_auxtrace_info_stub;
355 if (tool->auxtrace == NULL)
356 tool->auxtrace = process_event_auxtrace_stub;
357 if (tool->auxtrace_error == NULL)
358 tool->auxtrace_error = process_event_auxtrace_error_stub;
359 if (tool->thread_map == NULL)
360 tool->thread_map = process_event_thread_map_stub;
361 }
362
363 static void swap_sample_id_all(union perf_event *event, void *data)
364 {
365 void *end = (void *) event + event->header.size;
366 int size = end - data;
367
368 BUG_ON(size % sizeof(u64));
369 mem_bswap_64(data, size);
370 }
371
372 static void perf_event__all64_swap(union perf_event *event,
373 bool sample_id_all __maybe_unused)
374 {
375 struct perf_event_header *hdr = &event->header;
376 mem_bswap_64(hdr + 1, event->header.size - sizeof(*hdr));
377 }
378
379 static void perf_event__comm_swap(union perf_event *event, bool sample_id_all)
380 {
381 event->comm.pid = bswap_32(event->comm.pid);
382 event->comm.tid = bswap_32(event->comm.tid);
383
384 if (sample_id_all) {
385 void *data = &event->comm.comm;
386
387 data += PERF_ALIGN(strlen(data) + 1, sizeof(u64));
388 swap_sample_id_all(event, data);
389 }
390 }
391
392 static void perf_event__mmap_swap(union perf_event *event,
393 bool sample_id_all)
394 {
395 event->mmap.pid = bswap_32(event->mmap.pid);
396 event->mmap.tid = bswap_32(event->mmap.tid);
397 event->mmap.start = bswap_64(event->mmap.start);
398 event->mmap.len = bswap_64(event->mmap.len);
399 event->mmap.pgoff = bswap_64(event->mmap.pgoff);
400
401 if (sample_id_all) {
402 void *data = &event->mmap.filename;
403
404 data += PERF_ALIGN(strlen(data) + 1, sizeof(u64));
405 swap_sample_id_all(event, data);
406 }
407 }
408
409 static void perf_event__mmap2_swap(union perf_event *event,
410 bool sample_id_all)
411 {
412 event->mmap2.pid = bswap_32(event->mmap2.pid);
413 event->mmap2.tid = bswap_32(event->mmap2.tid);
414 event->mmap2.start = bswap_64(event->mmap2.start);
415 event->mmap2.len = bswap_64(event->mmap2.len);
416 event->mmap2.pgoff = bswap_64(event->mmap2.pgoff);
417 event->mmap2.maj = bswap_32(event->mmap2.maj);
418 event->mmap2.min = bswap_32(event->mmap2.min);
419 event->mmap2.ino = bswap_64(event->mmap2.ino);
420
421 if (sample_id_all) {
422 void *data = &event->mmap2.filename;
423
424 data += PERF_ALIGN(strlen(data) + 1, sizeof(u64));
425 swap_sample_id_all(event, data);
426 }
427 }
428 static void perf_event__task_swap(union perf_event *event, bool sample_id_all)
429 {
430 event->fork.pid = bswap_32(event->fork.pid);
431 event->fork.tid = bswap_32(event->fork.tid);
432 event->fork.ppid = bswap_32(event->fork.ppid);
433 event->fork.ptid = bswap_32(event->fork.ptid);
434 event->fork.time = bswap_64(event->fork.time);
435
436 if (sample_id_all)
437 swap_sample_id_all(event, &event->fork + 1);
438 }
439
440 static void perf_event__read_swap(union perf_event *event, bool sample_id_all)
441 {
442 event->read.pid = bswap_32(event->read.pid);
443 event->read.tid = bswap_32(event->read.tid);
444 event->read.value = bswap_64(event->read.value);
445 event->read.time_enabled = bswap_64(event->read.time_enabled);
446 event->read.time_running = bswap_64(event->read.time_running);
447 event->read.id = bswap_64(event->read.id);
448
449 if (sample_id_all)
450 swap_sample_id_all(event, &event->read + 1);
451 }
452
453 static void perf_event__aux_swap(union perf_event *event, bool sample_id_all)
454 {
455 event->aux.aux_offset = bswap_64(event->aux.aux_offset);
456 event->aux.aux_size = bswap_64(event->aux.aux_size);
457 event->aux.flags = bswap_64(event->aux.flags);
458
459 if (sample_id_all)
460 swap_sample_id_all(event, &event->aux + 1);
461 }
462
463 static void perf_event__itrace_start_swap(union perf_event *event,
464 bool sample_id_all)
465 {
466 event->itrace_start.pid = bswap_32(event->itrace_start.pid);
467 event->itrace_start.tid = bswap_32(event->itrace_start.tid);
468
469 if (sample_id_all)
470 swap_sample_id_all(event, &event->itrace_start + 1);
471 }
472
473 static void perf_event__switch_swap(union perf_event *event, bool sample_id_all)
474 {
475 if (event->header.type == PERF_RECORD_SWITCH_CPU_WIDE) {
476 event->context_switch.next_prev_pid =
477 bswap_32(event->context_switch.next_prev_pid);
478 event->context_switch.next_prev_tid =
479 bswap_32(event->context_switch.next_prev_tid);
480 }
481
482 if (sample_id_all)
483 swap_sample_id_all(event, &event->context_switch + 1);
484 }
485
486 static void perf_event__throttle_swap(union perf_event *event,
487 bool sample_id_all)
488 {
489 event->throttle.time = bswap_64(event->throttle.time);
490 event->throttle.id = bswap_64(event->throttle.id);
491 event->throttle.stream_id = bswap_64(event->throttle.stream_id);
492
493 if (sample_id_all)
494 swap_sample_id_all(event, &event->throttle + 1);
495 }
496
497 static u8 revbyte(u8 b)
498 {
499 int rev = (b >> 4) | ((b & 0xf) << 4);
500 rev = ((rev & 0xcc) >> 2) | ((rev & 0x33) << 2);
501 rev = ((rev & 0xaa) >> 1) | ((rev & 0x55) << 1);
502 return (u8) rev;
503 }
504
505 /*
506 * XXX this is hack in attempt to carry flags bitfield
507 * throught endian village. ABI says:
508 *
509 * Bit-fields are allocated from right to left (least to most significant)
510 * on little-endian implementations and from left to right (most to least
511 * significant) on big-endian implementations.
512 *
513 * The above seems to be byte specific, so we need to reverse each
514 * byte of the bitfield. 'Internet' also says this might be implementation
515 * specific and we probably need proper fix and carry perf_event_attr
516 * bitfield flags in separate data file FEAT_ section. Thought this seems
517 * to work for now.
518 */
519 static void swap_bitfield(u8 *p, unsigned len)
520 {
521 unsigned i;
522
523 for (i = 0; i < len; i++) {
524 *p = revbyte(*p);
525 p++;
526 }
527 }
528
529 /* exported for swapping attributes in file header */
530 void perf_event__attr_swap(struct perf_event_attr *attr)
531 {
532 attr->type = bswap_32(attr->type);
533 attr->size = bswap_32(attr->size);
534
535 #define bswap_safe(f, n) \
536 (attr->size > (offsetof(struct perf_event_attr, f) + \
537 sizeof(attr->f) * (n)))
538 #define bswap_field(f, sz) \
539 do { \
540 if (bswap_safe(f, 0)) \
541 attr->f = bswap_##sz(attr->f); \
542 } while(0)
543 #define bswap_field_32(f) bswap_field(f, 32)
544 #define bswap_field_64(f) bswap_field(f, 64)
545
546 bswap_field_64(config);
547 bswap_field_64(sample_period);
548 bswap_field_64(sample_type);
549 bswap_field_64(read_format);
550 bswap_field_32(wakeup_events);
551 bswap_field_32(bp_type);
552 bswap_field_64(bp_addr);
553 bswap_field_64(bp_len);
554 bswap_field_64(branch_sample_type);
555 bswap_field_64(sample_regs_user);
556 bswap_field_32(sample_stack_user);
557 bswap_field_32(aux_watermark);
558
559 /*
560 * After read_format are bitfields. Check read_format because
561 * we are unable to use offsetof on bitfield.
562 */
563 if (bswap_safe(read_format, 1))
564 swap_bitfield((u8 *) (&attr->read_format + 1),
565 sizeof(u64));
566 #undef bswap_field_64
567 #undef bswap_field_32
568 #undef bswap_field
569 #undef bswap_safe
570 }
571
572 static void perf_event__hdr_attr_swap(union perf_event *event,
573 bool sample_id_all __maybe_unused)
574 {
575 size_t size;
576
577 perf_event__attr_swap(&event->attr.attr);
578
579 size = event->header.size;
580 size -= (void *)&event->attr.id - (void *)event;
581 mem_bswap_64(event->attr.id, size);
582 }
583
584 static void perf_event__event_type_swap(union perf_event *event,
585 bool sample_id_all __maybe_unused)
586 {
587 event->event_type.event_type.event_id =
588 bswap_64(event->event_type.event_type.event_id);
589 }
590
591 static void perf_event__tracing_data_swap(union perf_event *event,
592 bool sample_id_all __maybe_unused)
593 {
594 event->tracing_data.size = bswap_32(event->tracing_data.size);
595 }
596
597 static void perf_event__auxtrace_info_swap(union perf_event *event,
598 bool sample_id_all __maybe_unused)
599 {
600 size_t size;
601
602 event->auxtrace_info.type = bswap_32(event->auxtrace_info.type);
603
604 size = event->header.size;
605 size -= (void *)&event->auxtrace_info.priv - (void *)event;
606 mem_bswap_64(event->auxtrace_info.priv, size);
607 }
608
609 static void perf_event__auxtrace_swap(union perf_event *event,
610 bool sample_id_all __maybe_unused)
611 {
612 event->auxtrace.size = bswap_64(event->auxtrace.size);
613 event->auxtrace.offset = bswap_64(event->auxtrace.offset);
614 event->auxtrace.reference = bswap_64(event->auxtrace.reference);
615 event->auxtrace.idx = bswap_32(event->auxtrace.idx);
616 event->auxtrace.tid = bswap_32(event->auxtrace.tid);
617 event->auxtrace.cpu = bswap_32(event->auxtrace.cpu);
618 }
619
620 static void perf_event__auxtrace_error_swap(union perf_event *event,
621 bool sample_id_all __maybe_unused)
622 {
623 event->auxtrace_error.type = bswap_32(event->auxtrace_error.type);
624 event->auxtrace_error.code = bswap_32(event->auxtrace_error.code);
625 event->auxtrace_error.cpu = bswap_32(event->auxtrace_error.cpu);
626 event->auxtrace_error.pid = bswap_32(event->auxtrace_error.pid);
627 event->auxtrace_error.tid = bswap_32(event->auxtrace_error.tid);
628 event->auxtrace_error.ip = bswap_64(event->auxtrace_error.ip);
629 }
630
631 static void perf_event__thread_map_swap(union perf_event *event,
632 bool sample_id_all __maybe_unused)
633 {
634 unsigned i;
635
636 event->thread_map.nr = bswap_64(event->thread_map.nr);
637
638 for (i = 0; i < event->thread_map.nr; i++)
639 event->thread_map.entries[i].pid = bswap_64(event->thread_map.entries[i].pid);
640 }
641
642 typedef void (*perf_event__swap_op)(union perf_event *event,
643 bool sample_id_all);
644
645 static perf_event__swap_op perf_event__swap_ops[] = {
646 [PERF_RECORD_MMAP] = perf_event__mmap_swap,
647 [PERF_RECORD_MMAP2] = perf_event__mmap2_swap,
648 [PERF_RECORD_COMM] = perf_event__comm_swap,
649 [PERF_RECORD_FORK] = perf_event__task_swap,
650 [PERF_RECORD_EXIT] = perf_event__task_swap,
651 [PERF_RECORD_LOST] = perf_event__all64_swap,
652 [PERF_RECORD_READ] = perf_event__read_swap,
653 [PERF_RECORD_THROTTLE] = perf_event__throttle_swap,
654 [PERF_RECORD_UNTHROTTLE] = perf_event__throttle_swap,
655 [PERF_RECORD_SAMPLE] = perf_event__all64_swap,
656 [PERF_RECORD_AUX] = perf_event__aux_swap,
657 [PERF_RECORD_ITRACE_START] = perf_event__itrace_start_swap,
658 [PERF_RECORD_LOST_SAMPLES] = perf_event__all64_swap,
659 [PERF_RECORD_SWITCH] = perf_event__switch_swap,
660 [PERF_RECORD_SWITCH_CPU_WIDE] = perf_event__switch_swap,
661 [PERF_RECORD_HEADER_ATTR] = perf_event__hdr_attr_swap,
662 [PERF_RECORD_HEADER_EVENT_TYPE] = perf_event__event_type_swap,
663 [PERF_RECORD_HEADER_TRACING_DATA] = perf_event__tracing_data_swap,
664 [PERF_RECORD_HEADER_BUILD_ID] = NULL,
665 [PERF_RECORD_ID_INDEX] = perf_event__all64_swap,
666 [PERF_RECORD_AUXTRACE_INFO] = perf_event__auxtrace_info_swap,
667 [PERF_RECORD_AUXTRACE] = perf_event__auxtrace_swap,
668 [PERF_RECORD_AUXTRACE_ERROR] = perf_event__auxtrace_error_swap,
669 [PERF_RECORD_THREAD_MAP] = perf_event__thread_map_swap,
670 [PERF_RECORD_HEADER_MAX] = NULL,
671 };
672
673 /*
674 * When perf record finishes a pass on every buffers, it records this pseudo
675 * event.
676 * We record the max timestamp t found in the pass n.
677 * Assuming these timestamps are monotonic across cpus, we know that if
678 * a buffer still has events with timestamps below t, they will be all
679 * available and then read in the pass n + 1.
680 * Hence when we start to read the pass n + 2, we can safely flush every
681 * events with timestamps below t.
682 *
683 * ============ PASS n =================
684 * CPU 0 | CPU 1
685 * |
686 * cnt1 timestamps | cnt2 timestamps
687 * 1 | 2
688 * 2 | 3
689 * - | 4 <--- max recorded
690 *
691 * ============ PASS n + 1 ==============
692 * CPU 0 | CPU 1
693 * |
694 * cnt1 timestamps | cnt2 timestamps
695 * 3 | 5
696 * 4 | 6
697 * 5 | 7 <---- max recorded
698 *
699 * Flush every events below timestamp 4
700 *
701 * ============ PASS n + 2 ==============
702 * CPU 0 | CPU 1
703 * |
704 * cnt1 timestamps | cnt2 timestamps
705 * 6 | 8
706 * 7 | 9
707 * - | 10
708 *
709 * Flush every events below timestamp 7
710 * etc...
711 */
712 static int process_finished_round(struct perf_tool *tool __maybe_unused,
713 union perf_event *event __maybe_unused,
714 struct ordered_events *oe)
715 {
716 if (dump_trace)
717 fprintf(stdout, "\n");
718 return ordered_events__flush(oe, OE_FLUSH__ROUND);
719 }
720
721 int perf_session__queue_event(struct perf_session *s, union perf_event *event,
722 struct perf_sample *sample, u64 file_offset)
723 {
724 return ordered_events__queue(&s->ordered_events, event, sample, file_offset);
725 }
726
727 static void callchain__lbr_callstack_printf(struct perf_sample *sample)
728 {
729 struct ip_callchain *callchain = sample->callchain;
730 struct branch_stack *lbr_stack = sample->branch_stack;
731 u64 kernel_callchain_nr = callchain->nr;
732 unsigned int i;
733
734 for (i = 0; i < kernel_callchain_nr; i++) {
735 if (callchain->ips[i] == PERF_CONTEXT_USER)
736 break;
737 }
738
739 if ((i != kernel_callchain_nr) && lbr_stack->nr) {
740 u64 total_nr;
741 /*
742 * LBR callstack can only get user call chain,
743 * i is kernel call chain number,
744 * 1 is PERF_CONTEXT_USER.
745 *
746 * The user call chain is stored in LBR registers.
747 * LBR are pair registers. The caller is stored
748 * in "from" register, while the callee is stored
749 * in "to" register.
750 * For example, there is a call stack
751 * "A"->"B"->"C"->"D".
752 * The LBR registers will recorde like
753 * "C"->"D", "B"->"C", "A"->"B".
754 * So only the first "to" register and all "from"
755 * registers are needed to construct the whole stack.
756 */
757 total_nr = i + 1 + lbr_stack->nr + 1;
758 kernel_callchain_nr = i + 1;
759
760 printf("... LBR call chain: nr:%" PRIu64 "\n", total_nr);
761
762 for (i = 0; i < kernel_callchain_nr; i++)
763 printf("..... %2d: %016" PRIx64 "\n",
764 i, callchain->ips[i]);
765
766 printf("..... %2d: %016" PRIx64 "\n",
767 (int)(kernel_callchain_nr), lbr_stack->entries[0].to);
768 for (i = 0; i < lbr_stack->nr; i++)
769 printf("..... %2d: %016" PRIx64 "\n",
770 (int)(i + kernel_callchain_nr + 1), lbr_stack->entries[i].from);
771 }
772 }
773
774 static void callchain__printf(struct perf_evsel *evsel,
775 struct perf_sample *sample)
776 {
777 unsigned int i;
778 struct ip_callchain *callchain = sample->callchain;
779
780 if (has_branch_callstack(evsel))
781 callchain__lbr_callstack_printf(sample);
782
783 printf("... FP chain: nr:%" PRIu64 "\n", callchain->nr);
784
785 for (i = 0; i < callchain->nr; i++)
786 printf("..... %2d: %016" PRIx64 "\n",
787 i, callchain->ips[i]);
788 }
789
790 static void branch_stack__printf(struct perf_sample *sample)
791 {
792 uint64_t i;
793
794 printf("... branch stack: nr:%" PRIu64 "\n", sample->branch_stack->nr);
795
796 for (i = 0; i < sample->branch_stack->nr; i++) {
797 struct branch_entry *e = &sample->branch_stack->entries[i];
798
799 printf("..... %2"PRIu64": %016" PRIx64 " -> %016" PRIx64 " %hu cycles %s%s%s%s %x\n",
800 i, e->from, e->to,
801 e->flags.cycles,
802 e->flags.mispred ? "M" : " ",
803 e->flags.predicted ? "P" : " ",
804 e->flags.abort ? "A" : " ",
805 e->flags.in_tx ? "T" : " ",
806 (unsigned)e->flags.reserved);
807 }
808 }
809
810 static void regs_dump__printf(u64 mask, u64 *regs)
811 {
812 unsigned rid, i = 0;
813
814 for_each_set_bit(rid, (unsigned long *) &mask, sizeof(mask) * 8) {
815 u64 val = regs[i++];
816
817 printf(".... %-5s 0x%" PRIx64 "\n",
818 perf_reg_name(rid), val);
819 }
820 }
821
822 static const char *regs_abi[] = {
823 [PERF_SAMPLE_REGS_ABI_NONE] = "none",
824 [PERF_SAMPLE_REGS_ABI_32] = "32-bit",
825 [PERF_SAMPLE_REGS_ABI_64] = "64-bit",
826 };
827
828 static inline const char *regs_dump_abi(struct regs_dump *d)
829 {
830 if (d->abi > PERF_SAMPLE_REGS_ABI_64)
831 return "unknown";
832
833 return regs_abi[d->abi];
834 }
835
836 static void regs__printf(const char *type, struct regs_dump *regs)
837 {
838 u64 mask = regs->mask;
839
840 printf("... %s regs: mask 0x%" PRIx64 " ABI %s\n",
841 type,
842 mask,
843 regs_dump_abi(regs));
844
845 regs_dump__printf(mask, regs->regs);
846 }
847
848 static void regs_user__printf(struct perf_sample *sample)
849 {
850 struct regs_dump *user_regs = &sample->user_regs;
851
852 if (user_regs->regs)
853 regs__printf("user", user_regs);
854 }
855
856 static void regs_intr__printf(struct perf_sample *sample)
857 {
858 struct regs_dump *intr_regs = &sample->intr_regs;
859
860 if (intr_regs->regs)
861 regs__printf("intr", intr_regs);
862 }
863
864 static void stack_user__printf(struct stack_dump *dump)
865 {
866 printf("... ustack: size %" PRIu64 ", offset 0x%x\n",
867 dump->size, dump->offset);
868 }
869
870 static void perf_evlist__print_tstamp(struct perf_evlist *evlist,
871 union perf_event *event,
872 struct perf_sample *sample)
873 {
874 u64 sample_type = __perf_evlist__combined_sample_type(evlist);
875
876 if (event->header.type != PERF_RECORD_SAMPLE &&
877 !perf_evlist__sample_id_all(evlist)) {
878 fputs("-1 -1 ", stdout);
879 return;
880 }
881
882 if ((sample_type & PERF_SAMPLE_CPU))
883 printf("%u ", sample->cpu);
884
885 if (sample_type & PERF_SAMPLE_TIME)
886 printf("%" PRIu64 " ", sample->time);
887 }
888
889 static void sample_read__printf(struct perf_sample *sample, u64 read_format)
890 {
891 printf("... sample_read:\n");
892
893 if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED)
894 printf("...... time enabled %016" PRIx64 "\n",
895 sample->read.time_enabled);
896
897 if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING)
898 printf("...... time running %016" PRIx64 "\n",
899 sample->read.time_running);
900
901 if (read_format & PERF_FORMAT_GROUP) {
902 u64 i;
903
904 printf(".... group nr %" PRIu64 "\n", sample->read.group.nr);
905
906 for (i = 0; i < sample->read.group.nr; i++) {
907 struct sample_read_value *value;
908
909 value = &sample->read.group.values[i];
910 printf("..... id %016" PRIx64
911 ", value %016" PRIx64 "\n",
912 value->id, value->value);
913 }
914 } else
915 printf("..... id %016" PRIx64 ", value %016" PRIx64 "\n",
916 sample->read.one.id, sample->read.one.value);
917 }
918
919 static void dump_event(struct perf_evlist *evlist, union perf_event *event,
920 u64 file_offset, struct perf_sample *sample)
921 {
922 if (!dump_trace)
923 return;
924
925 printf("\n%#" PRIx64 " [%#x]: event: %d\n",
926 file_offset, event->header.size, event->header.type);
927
928 trace_event(event);
929
930 if (sample)
931 perf_evlist__print_tstamp(evlist, event, sample);
932
933 printf("%#" PRIx64 " [%#x]: PERF_RECORD_%s", file_offset,
934 event->header.size, perf_event__name(event->header.type));
935 }
936
937 static void dump_sample(struct perf_evsel *evsel, union perf_event *event,
938 struct perf_sample *sample)
939 {
940 u64 sample_type;
941
942 if (!dump_trace)
943 return;
944
945 printf("(IP, 0x%x): %d/%d: %#" PRIx64 " period: %" PRIu64 " addr: %#" PRIx64 "\n",
946 event->header.misc, sample->pid, sample->tid, sample->ip,
947 sample->period, sample->addr);
948
949 sample_type = evsel->attr.sample_type;
950
951 if (sample_type & PERF_SAMPLE_CALLCHAIN)
952 callchain__printf(evsel, sample);
953
954 if ((sample_type & PERF_SAMPLE_BRANCH_STACK) && !has_branch_callstack(evsel))
955 branch_stack__printf(sample);
956
957 if (sample_type & PERF_SAMPLE_REGS_USER)
958 regs_user__printf(sample);
959
960 if (sample_type & PERF_SAMPLE_REGS_INTR)
961 regs_intr__printf(sample);
962
963 if (sample_type & PERF_SAMPLE_STACK_USER)
964 stack_user__printf(&sample->user_stack);
965
966 if (sample_type & PERF_SAMPLE_WEIGHT)
967 printf("... weight: %" PRIu64 "\n", sample->weight);
968
969 if (sample_type & PERF_SAMPLE_DATA_SRC)
970 printf(" . data_src: 0x%"PRIx64"\n", sample->data_src);
971
972 if (sample_type & PERF_SAMPLE_TRANSACTION)
973 printf("... transaction: %" PRIx64 "\n", sample->transaction);
974
975 if (sample_type & PERF_SAMPLE_READ)
976 sample_read__printf(sample, evsel->attr.read_format);
977 }
978
979 static struct machine *machines__find_for_cpumode(struct machines *machines,
980 union perf_event *event,
981 struct perf_sample *sample)
982 {
983 const u8 cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK;
984 struct machine *machine;
985
986 if (perf_guest &&
987 ((cpumode == PERF_RECORD_MISC_GUEST_KERNEL) ||
988 (cpumode == PERF_RECORD_MISC_GUEST_USER))) {
989 u32 pid;
990
991 if (event->header.type == PERF_RECORD_MMAP
992 || event->header.type == PERF_RECORD_MMAP2)
993 pid = event->mmap.pid;
994 else
995 pid = sample->pid;
996
997 machine = machines__find(machines, pid);
998 if (!machine)
999 machine = machines__find(machines, DEFAULT_GUEST_KERNEL_ID);
1000 return machine;
1001 }
1002
1003 return &machines->host;
1004 }
1005
1006 static int deliver_sample_value(struct perf_evlist *evlist,
1007 struct perf_tool *tool,
1008 union perf_event *event,
1009 struct perf_sample *sample,
1010 struct sample_read_value *v,
1011 struct machine *machine)
1012 {
1013 struct perf_sample_id *sid = perf_evlist__id2sid(evlist, v->id);
1014
1015 if (sid) {
1016 sample->id = v->id;
1017 sample->period = v->value - sid->period;
1018 sid->period = v->value;
1019 }
1020
1021 if (!sid || sid->evsel == NULL) {
1022 ++evlist->stats.nr_unknown_id;
1023 return 0;
1024 }
1025
1026 return tool->sample(tool, event, sample, sid->evsel, machine);
1027 }
1028
1029 static int deliver_sample_group(struct perf_evlist *evlist,
1030 struct perf_tool *tool,
1031 union perf_event *event,
1032 struct perf_sample *sample,
1033 struct machine *machine)
1034 {
1035 int ret = -EINVAL;
1036 u64 i;
1037
1038 for (i = 0; i < sample->read.group.nr; i++) {
1039 ret = deliver_sample_value(evlist, tool, event, sample,
1040 &sample->read.group.values[i],
1041 machine);
1042 if (ret)
1043 break;
1044 }
1045
1046 return ret;
1047 }
1048
1049 static int
1050 perf_evlist__deliver_sample(struct perf_evlist *evlist,
1051 struct perf_tool *tool,
1052 union perf_event *event,
1053 struct perf_sample *sample,
1054 struct perf_evsel *evsel,
1055 struct machine *machine)
1056 {
1057 /* We know evsel != NULL. */
1058 u64 sample_type = evsel->attr.sample_type;
1059 u64 read_format = evsel->attr.read_format;
1060
1061 /* Standard sample delievery. */
1062 if (!(sample_type & PERF_SAMPLE_READ))
1063 return tool->sample(tool, event, sample, evsel, machine);
1064
1065 /* For PERF_SAMPLE_READ we have either single or group mode. */
1066 if (read_format & PERF_FORMAT_GROUP)
1067 return deliver_sample_group(evlist, tool, event, sample,
1068 machine);
1069 else
1070 return deliver_sample_value(evlist, tool, event, sample,
1071 &sample->read.one, machine);
1072 }
1073
1074 static int machines__deliver_event(struct machines *machines,
1075 struct perf_evlist *evlist,
1076 union perf_event *event,
1077 struct perf_sample *sample,
1078 struct perf_tool *tool, u64 file_offset)
1079 {
1080 struct perf_evsel *evsel;
1081 struct machine *machine;
1082
1083 dump_event(evlist, event, file_offset, sample);
1084
1085 evsel = perf_evlist__id2evsel(evlist, sample->id);
1086
1087 machine = machines__find_for_cpumode(machines, event, sample);
1088
1089 switch (event->header.type) {
1090 case PERF_RECORD_SAMPLE:
1091 if (evsel == NULL) {
1092 ++evlist->stats.nr_unknown_id;
1093 return 0;
1094 }
1095 dump_sample(evsel, event, sample);
1096 if (machine == NULL) {
1097 ++evlist->stats.nr_unprocessable_samples;
1098 return 0;
1099 }
1100 return perf_evlist__deliver_sample(evlist, tool, event, sample, evsel, machine);
1101 case PERF_RECORD_MMAP:
1102 return tool->mmap(tool, event, sample, machine);
1103 case PERF_RECORD_MMAP2:
1104 if (event->header.misc & PERF_RECORD_MISC_PROC_MAP_PARSE_TIMEOUT)
1105 ++evlist->stats.nr_proc_map_timeout;
1106 return tool->mmap2(tool, event, sample, machine);
1107 case PERF_RECORD_COMM:
1108 return tool->comm(tool, event, sample, machine);
1109 case PERF_RECORD_FORK:
1110 return tool->fork(tool, event, sample, machine);
1111 case PERF_RECORD_EXIT:
1112 return tool->exit(tool, event, sample, machine);
1113 case PERF_RECORD_LOST:
1114 if (tool->lost == perf_event__process_lost)
1115 evlist->stats.total_lost += event->lost.lost;
1116 return tool->lost(tool, event, sample, machine);
1117 case PERF_RECORD_LOST_SAMPLES:
1118 if (tool->lost_samples == perf_event__process_lost_samples)
1119 evlist->stats.total_lost_samples += event->lost_samples.lost;
1120 return tool->lost_samples(tool, event, sample, machine);
1121 case PERF_RECORD_READ:
1122 return tool->read(tool, event, sample, evsel, machine);
1123 case PERF_RECORD_THROTTLE:
1124 return tool->throttle(tool, event, sample, machine);
1125 case PERF_RECORD_UNTHROTTLE:
1126 return tool->unthrottle(tool, event, sample, machine);
1127 case PERF_RECORD_AUX:
1128 if (tool->aux == perf_event__process_aux &&
1129 (event->aux.flags & PERF_AUX_FLAG_TRUNCATED))
1130 evlist->stats.total_aux_lost += 1;
1131 return tool->aux(tool, event, sample, machine);
1132 case PERF_RECORD_ITRACE_START:
1133 return tool->itrace_start(tool, event, sample, machine);
1134 case PERF_RECORD_SWITCH:
1135 case PERF_RECORD_SWITCH_CPU_WIDE:
1136 return tool->context_switch(tool, event, sample, machine);
1137 default:
1138 ++evlist->stats.nr_unknown_events;
1139 return -1;
1140 }
1141 }
1142
1143 static int perf_session__deliver_event(struct perf_session *session,
1144 union perf_event *event,
1145 struct perf_sample *sample,
1146 struct perf_tool *tool,
1147 u64 file_offset)
1148 {
1149 int ret;
1150
1151 ret = auxtrace__process_event(session, event, sample, tool);
1152 if (ret < 0)
1153 return ret;
1154 if (ret > 0)
1155 return 0;
1156
1157 return machines__deliver_event(&session->machines, session->evlist,
1158 event, sample, tool, file_offset);
1159 }
1160
1161 static s64 perf_session__process_user_event(struct perf_session *session,
1162 union perf_event *event,
1163 u64 file_offset)
1164 {
1165 struct ordered_events *oe = &session->ordered_events;
1166 struct perf_tool *tool = session->tool;
1167 int fd = perf_data_file__fd(session->file);
1168 int err;
1169
1170 dump_event(session->evlist, event, file_offset, NULL);
1171
1172 /* These events are processed right away */
1173 switch (event->header.type) {
1174 case PERF_RECORD_HEADER_ATTR:
1175 err = tool->attr(tool, event, &session->evlist);
1176 if (err == 0) {
1177 perf_session__set_id_hdr_size(session);
1178 perf_session__set_comm_exec(session);
1179 }
1180 return err;
1181 case PERF_RECORD_HEADER_EVENT_TYPE:
1182 /*
1183 * Depreceated, but we need to handle it for sake
1184 * of old data files create in pipe mode.
1185 */
1186 return 0;
1187 case PERF_RECORD_HEADER_TRACING_DATA:
1188 /* setup for reading amidst mmap */
1189 lseek(fd, file_offset, SEEK_SET);
1190 return tool->tracing_data(tool, event, session);
1191 case PERF_RECORD_HEADER_BUILD_ID:
1192 return tool->build_id(tool, event, session);
1193 case PERF_RECORD_FINISHED_ROUND:
1194 return tool->finished_round(tool, event, oe);
1195 case PERF_RECORD_ID_INDEX:
1196 return tool->id_index(tool, event, session);
1197 case PERF_RECORD_AUXTRACE_INFO:
1198 return tool->auxtrace_info(tool, event, session);
1199 case PERF_RECORD_AUXTRACE:
1200 /* setup for reading amidst mmap */
1201 lseek(fd, file_offset + event->header.size, SEEK_SET);
1202 return tool->auxtrace(tool, event, session);
1203 case PERF_RECORD_AUXTRACE_ERROR:
1204 perf_session__auxtrace_error_inc(session, event);
1205 return tool->auxtrace_error(tool, event, session);
1206 case PERF_RECORD_THREAD_MAP:
1207 return tool->thread_map(tool, event, session);
1208 default:
1209 return -EINVAL;
1210 }
1211 }
1212
1213 int perf_session__deliver_synth_event(struct perf_session *session,
1214 union perf_event *event,
1215 struct perf_sample *sample)
1216 {
1217 struct perf_evlist *evlist = session->evlist;
1218 struct perf_tool *tool = session->tool;
1219
1220 events_stats__inc(&evlist->stats, event->header.type);
1221
1222 if (event->header.type >= PERF_RECORD_USER_TYPE_START)
1223 return perf_session__process_user_event(session, event, 0);
1224
1225 return machines__deliver_event(&session->machines, evlist, event, sample, tool, 0);
1226 }
1227
1228 static void event_swap(union perf_event *event, bool sample_id_all)
1229 {
1230 perf_event__swap_op swap;
1231
1232 swap = perf_event__swap_ops[event->header.type];
1233 if (swap)
1234 swap(event, sample_id_all);
1235 }
1236
1237 int perf_session__peek_event(struct perf_session *session, off_t file_offset,
1238 void *buf, size_t buf_sz,
1239 union perf_event **event_ptr,
1240 struct perf_sample *sample)
1241 {
1242 union perf_event *event;
1243 size_t hdr_sz, rest;
1244 int fd;
1245
1246 if (session->one_mmap && !session->header.needs_swap) {
1247 event = file_offset - session->one_mmap_offset +
1248 session->one_mmap_addr;
1249 goto out_parse_sample;
1250 }
1251
1252 if (perf_data_file__is_pipe(session->file))
1253 return -1;
1254
1255 fd = perf_data_file__fd(session->file);
1256 hdr_sz = sizeof(struct perf_event_header);
1257
1258 if (buf_sz < hdr_sz)
1259 return -1;
1260
1261 if (lseek(fd, file_offset, SEEK_SET) == (off_t)-1 ||
1262 readn(fd, buf, hdr_sz) != (ssize_t)hdr_sz)
1263 return -1;
1264
1265 event = (union perf_event *)buf;
1266
1267 if (session->header.needs_swap)
1268 perf_event_header__bswap(&event->header);
1269
1270 if (event->header.size < hdr_sz || event->header.size > buf_sz)
1271 return -1;
1272
1273 rest = event->header.size - hdr_sz;
1274
1275 if (readn(fd, buf, rest) != (ssize_t)rest)
1276 return -1;
1277
1278 if (session->header.needs_swap)
1279 event_swap(event, perf_evlist__sample_id_all(session->evlist));
1280
1281 out_parse_sample:
1282
1283 if (sample && event->header.type < PERF_RECORD_USER_TYPE_START &&
1284 perf_evlist__parse_sample(session->evlist, event, sample))
1285 return -1;
1286
1287 *event_ptr = event;
1288
1289 return 0;
1290 }
1291
1292 static s64 perf_session__process_event(struct perf_session *session,
1293 union perf_event *event, u64 file_offset)
1294 {
1295 struct perf_evlist *evlist = session->evlist;
1296 struct perf_tool *tool = session->tool;
1297 struct perf_sample sample;
1298 int ret;
1299
1300 if (session->header.needs_swap)
1301 event_swap(event, perf_evlist__sample_id_all(evlist));
1302
1303 if (event->header.type >= PERF_RECORD_HEADER_MAX)
1304 return -EINVAL;
1305
1306 events_stats__inc(&evlist->stats, event->header.type);
1307
1308 if (event->header.type >= PERF_RECORD_USER_TYPE_START)
1309 return perf_session__process_user_event(session, event, file_offset);
1310
1311 /*
1312 * For all kernel events we get the sample data
1313 */
1314 ret = perf_evlist__parse_sample(evlist, event, &sample);
1315 if (ret)
1316 return ret;
1317
1318 if (tool->ordered_events) {
1319 ret = perf_session__queue_event(session, event, &sample, file_offset);
1320 if (ret != -ETIME)
1321 return ret;
1322 }
1323
1324 return perf_session__deliver_event(session, event, &sample, tool,
1325 file_offset);
1326 }
1327
1328 void perf_event_header__bswap(struct perf_event_header *hdr)
1329 {
1330 hdr->type = bswap_32(hdr->type);
1331 hdr->misc = bswap_16(hdr->misc);
1332 hdr->size = bswap_16(hdr->size);
1333 }
1334
1335 struct thread *perf_session__findnew(struct perf_session *session, pid_t pid)
1336 {
1337 return machine__findnew_thread(&session->machines.host, -1, pid);
1338 }
1339
1340 int perf_session__register_idle_thread(struct perf_session *session)
1341 {
1342 struct thread *thread;
1343 int err = 0;
1344
1345 thread = machine__findnew_thread(&session->machines.host, 0, 0);
1346 if (thread == NULL || thread__set_comm(thread, "swapper", 0)) {
1347 pr_err("problem inserting idle task.\n");
1348 err = -1;
1349 }
1350
1351 /* machine__findnew_thread() got the thread, so put it */
1352 thread__put(thread);
1353 return err;
1354 }
1355
1356 static void perf_session__warn_about_errors(const struct perf_session *session)
1357 {
1358 const struct events_stats *stats = &session->evlist->stats;
1359 const struct ordered_events *oe = &session->ordered_events;
1360
1361 if (session->tool->lost == perf_event__process_lost &&
1362 stats->nr_events[PERF_RECORD_LOST] != 0) {
1363 ui__warning("Processed %d events and lost %d chunks!\n\n"
1364 "Check IO/CPU overload!\n\n",
1365 stats->nr_events[0],
1366 stats->nr_events[PERF_RECORD_LOST]);
1367 }
1368
1369 if (session->tool->lost_samples == perf_event__process_lost_samples) {
1370 double drop_rate;
1371
1372 drop_rate = (double)stats->total_lost_samples /
1373 (double) (stats->nr_events[PERF_RECORD_SAMPLE] + stats->total_lost_samples);
1374 if (drop_rate > 0.05) {
1375 ui__warning("Processed %" PRIu64 " samples and lost %3.2f%% samples!\n\n",
1376 stats->nr_events[PERF_RECORD_SAMPLE] + stats->total_lost_samples,
1377 drop_rate * 100.0);
1378 }
1379 }
1380
1381 if (session->tool->aux == perf_event__process_aux &&
1382 stats->total_aux_lost != 0) {
1383 ui__warning("AUX data lost %" PRIu64 " times out of %u!\n\n",
1384 stats->total_aux_lost,
1385 stats->nr_events[PERF_RECORD_AUX]);
1386 }
1387
1388 if (stats->nr_unknown_events != 0) {
1389 ui__warning("Found %u unknown events!\n\n"
1390 "Is this an older tool processing a perf.data "
1391 "file generated by a more recent tool?\n\n"
1392 "If that is not the case, consider "
1393 "reporting to linux-kernel@vger.kernel.org.\n\n",
1394 stats->nr_unknown_events);
1395 }
1396
1397 if (stats->nr_unknown_id != 0) {
1398 ui__warning("%u samples with id not present in the header\n",
1399 stats->nr_unknown_id);
1400 }
1401
1402 if (stats->nr_invalid_chains != 0) {
1403 ui__warning("Found invalid callchains!\n\n"
1404 "%u out of %u events were discarded for this reason.\n\n"
1405 "Consider reporting to linux-kernel@vger.kernel.org.\n\n",
1406 stats->nr_invalid_chains,
1407 stats->nr_events[PERF_RECORD_SAMPLE]);
1408 }
1409
1410 if (stats->nr_unprocessable_samples != 0) {
1411 ui__warning("%u unprocessable samples recorded.\n"
1412 "Do you have a KVM guest running and not using 'perf kvm'?\n",
1413 stats->nr_unprocessable_samples);
1414 }
1415
1416 if (oe->nr_unordered_events != 0)
1417 ui__warning("%u out of order events recorded.\n", oe->nr_unordered_events);
1418
1419 events_stats__auxtrace_error_warn(stats);
1420
1421 if (stats->nr_proc_map_timeout != 0) {
1422 ui__warning("%d map information files for pre-existing threads were\n"
1423 "not processed, if there are samples for addresses they\n"
1424 "will not be resolved, you may find out which are these\n"
1425 "threads by running with -v and redirecting the output\n"
1426 "to a file.\n"
1427 "The time limit to process proc map is too short?\n"
1428 "Increase it by --proc-map-timeout\n",
1429 stats->nr_proc_map_timeout);
1430 }
1431 }
1432
1433 static int perf_session__flush_thread_stack(struct thread *thread,
1434 void *p __maybe_unused)
1435 {
1436 return thread_stack__flush(thread);
1437 }
1438
1439 static int perf_session__flush_thread_stacks(struct perf_session *session)
1440 {
1441 return machines__for_each_thread(&session->machines,
1442 perf_session__flush_thread_stack,
1443 NULL);
1444 }
1445
1446 volatile int session_done;
1447
1448 static int __perf_session__process_pipe_events(struct perf_session *session)
1449 {
1450 struct ordered_events *oe = &session->ordered_events;
1451 struct perf_tool *tool = session->tool;
1452 int fd = perf_data_file__fd(session->file);
1453 union perf_event *event;
1454 uint32_t size, cur_size = 0;
1455 void *buf = NULL;
1456 s64 skip = 0;
1457 u64 head;
1458 ssize_t err;
1459 void *p;
1460
1461 perf_tool__fill_defaults(tool);
1462
1463 head = 0;
1464 cur_size = sizeof(union perf_event);
1465
1466 buf = malloc(cur_size);
1467 if (!buf)
1468 return -errno;
1469 more:
1470 event = buf;
1471 err = readn(fd, event, sizeof(struct perf_event_header));
1472 if (err <= 0) {
1473 if (err == 0)
1474 goto done;
1475
1476 pr_err("failed to read event header\n");
1477 goto out_err;
1478 }
1479
1480 if (session->header.needs_swap)
1481 perf_event_header__bswap(&event->header);
1482
1483 size = event->header.size;
1484 if (size < sizeof(struct perf_event_header)) {
1485 pr_err("bad event header size\n");
1486 goto out_err;
1487 }
1488
1489 if (size > cur_size) {
1490 void *new = realloc(buf, size);
1491 if (!new) {
1492 pr_err("failed to allocate memory to read event\n");
1493 goto out_err;
1494 }
1495 buf = new;
1496 cur_size = size;
1497 event = buf;
1498 }
1499 p = event;
1500 p += sizeof(struct perf_event_header);
1501
1502 if (size - sizeof(struct perf_event_header)) {
1503 err = readn(fd, p, size - sizeof(struct perf_event_header));
1504 if (err <= 0) {
1505 if (err == 0) {
1506 pr_err("unexpected end of event stream\n");
1507 goto done;
1508 }
1509
1510 pr_err("failed to read event data\n");
1511 goto out_err;
1512 }
1513 }
1514
1515 if ((skip = perf_session__process_event(session, event, head)) < 0) {
1516 pr_err("%#" PRIx64 " [%#x]: failed to process type: %d\n",
1517 head, event->header.size, event->header.type);
1518 err = -EINVAL;
1519 goto out_err;
1520 }
1521
1522 head += size;
1523
1524 if (skip > 0)
1525 head += skip;
1526
1527 if (!session_done())
1528 goto more;
1529 done:
1530 /* do the final flush for ordered samples */
1531 err = ordered_events__flush(oe, OE_FLUSH__FINAL);
1532 if (err)
1533 goto out_err;
1534 err = auxtrace__flush_events(session, tool);
1535 if (err)
1536 goto out_err;
1537 err = perf_session__flush_thread_stacks(session);
1538 out_err:
1539 free(buf);
1540 perf_session__warn_about_errors(session);
1541 ordered_events__free(&session->ordered_events);
1542 auxtrace__free_events(session);
1543 return err;
1544 }
1545
1546 static union perf_event *
1547 fetch_mmaped_event(struct perf_session *session,
1548 u64 head, size_t mmap_size, char *buf)
1549 {
1550 union perf_event *event;
1551
1552 /*
1553 * Ensure we have enough space remaining to read
1554 * the size of the event in the headers.
1555 */
1556 if (head + sizeof(event->header) > mmap_size)
1557 return NULL;
1558
1559 event = (union perf_event *)(buf + head);
1560
1561 if (session->header.needs_swap)
1562 perf_event_header__bswap(&event->header);
1563
1564 if (head + event->header.size > mmap_size) {
1565 /* We're not fetching the event so swap back again */
1566 if (session->header.needs_swap)
1567 perf_event_header__bswap(&event->header);
1568 return NULL;
1569 }
1570
1571 return event;
1572 }
1573
1574 /*
1575 * On 64bit we can mmap the data file in one go. No need for tiny mmap
1576 * slices. On 32bit we use 32MB.
1577 */
1578 #if BITS_PER_LONG == 64
1579 #define MMAP_SIZE ULLONG_MAX
1580 #define NUM_MMAPS 1
1581 #else
1582 #define MMAP_SIZE (32 * 1024 * 1024ULL)
1583 #define NUM_MMAPS 128
1584 #endif
1585
1586 static int __perf_session__process_events(struct perf_session *session,
1587 u64 data_offset, u64 data_size,
1588 u64 file_size)
1589 {
1590 struct ordered_events *oe = &session->ordered_events;
1591 struct perf_tool *tool = session->tool;
1592 int fd = perf_data_file__fd(session->file);
1593 u64 head, page_offset, file_offset, file_pos, size;
1594 int err, mmap_prot, mmap_flags, map_idx = 0;
1595 size_t mmap_size;
1596 char *buf, *mmaps[NUM_MMAPS];
1597 union perf_event *event;
1598 struct ui_progress prog;
1599 s64 skip;
1600
1601 perf_tool__fill_defaults(tool);
1602
1603 page_offset = page_size * (data_offset / page_size);
1604 file_offset = page_offset;
1605 head = data_offset - page_offset;
1606
1607 if (data_size == 0)
1608 goto out;
1609
1610 if (data_offset + data_size < file_size)
1611 file_size = data_offset + data_size;
1612
1613 ui_progress__init(&prog, file_size, "Processing events...");
1614
1615 mmap_size = MMAP_SIZE;
1616 if (mmap_size > file_size) {
1617 mmap_size = file_size;
1618 session->one_mmap = true;
1619 }
1620
1621 memset(mmaps, 0, sizeof(mmaps));
1622
1623 mmap_prot = PROT_READ;
1624 mmap_flags = MAP_SHARED;
1625
1626 if (session->header.needs_swap) {
1627 mmap_prot |= PROT_WRITE;
1628 mmap_flags = MAP_PRIVATE;
1629 }
1630 remap:
1631 buf = mmap(NULL, mmap_size, mmap_prot, mmap_flags, fd,
1632 file_offset);
1633 if (buf == MAP_FAILED) {
1634 pr_err("failed to mmap file\n");
1635 err = -errno;
1636 goto out_err;
1637 }
1638 mmaps[map_idx] = buf;
1639 map_idx = (map_idx + 1) & (ARRAY_SIZE(mmaps) - 1);
1640 file_pos = file_offset + head;
1641 if (session->one_mmap) {
1642 session->one_mmap_addr = buf;
1643 session->one_mmap_offset = file_offset;
1644 }
1645
1646 more:
1647 event = fetch_mmaped_event(session, head, mmap_size, buf);
1648 if (!event) {
1649 if (mmaps[map_idx]) {
1650 munmap(mmaps[map_idx], mmap_size);
1651 mmaps[map_idx] = NULL;
1652 }
1653
1654 page_offset = page_size * (head / page_size);
1655 file_offset += page_offset;
1656 head -= page_offset;
1657 goto remap;
1658 }
1659
1660 size = event->header.size;
1661
1662 if (size < sizeof(struct perf_event_header) ||
1663 (skip = perf_session__process_event(session, event, file_pos)) < 0) {
1664 pr_err("%#" PRIx64 " [%#x]: failed to process type: %d\n",
1665 file_offset + head, event->header.size,
1666 event->header.type);
1667 err = -EINVAL;
1668 goto out_err;
1669 }
1670
1671 if (skip)
1672 size += skip;
1673
1674 head += size;
1675 file_pos += size;
1676
1677 ui_progress__update(&prog, size);
1678
1679 if (session_done())
1680 goto out;
1681
1682 if (file_pos < file_size)
1683 goto more;
1684
1685 out:
1686 /* do the final flush for ordered samples */
1687 err = ordered_events__flush(oe, OE_FLUSH__FINAL);
1688 if (err)
1689 goto out_err;
1690 err = auxtrace__flush_events(session, tool);
1691 if (err)
1692 goto out_err;
1693 err = perf_session__flush_thread_stacks(session);
1694 out_err:
1695 ui_progress__finish();
1696 perf_session__warn_about_errors(session);
1697 ordered_events__free(&session->ordered_events);
1698 auxtrace__free_events(session);
1699 session->one_mmap = false;
1700 return err;
1701 }
1702
1703 int perf_session__process_events(struct perf_session *session)
1704 {
1705 u64 size = perf_data_file__size(session->file);
1706 int err;
1707
1708 if (perf_session__register_idle_thread(session) < 0)
1709 return -ENOMEM;
1710
1711 if (!perf_data_file__is_pipe(session->file))
1712 err = __perf_session__process_events(session,
1713 session->header.data_offset,
1714 session->header.data_size, size);
1715 else
1716 err = __perf_session__process_pipe_events(session);
1717
1718 return err;
1719 }
1720
1721 bool perf_session__has_traces(struct perf_session *session, const char *msg)
1722 {
1723 struct perf_evsel *evsel;
1724
1725 evlist__for_each(session->evlist, evsel) {
1726 if (evsel->attr.type == PERF_TYPE_TRACEPOINT)
1727 return true;
1728 }
1729
1730 pr_err("No trace sample to read. Did you call 'perf %s'?\n", msg);
1731 return false;
1732 }
1733
1734 int maps__set_kallsyms_ref_reloc_sym(struct map **maps,
1735 const char *symbol_name, u64 addr)
1736 {
1737 char *bracket;
1738 enum map_type i;
1739 struct ref_reloc_sym *ref;
1740
1741 ref = zalloc(sizeof(struct ref_reloc_sym));
1742 if (ref == NULL)
1743 return -ENOMEM;
1744
1745 ref->name = strdup(symbol_name);
1746 if (ref->name == NULL) {
1747 free(ref);
1748 return -ENOMEM;
1749 }
1750
1751 bracket = strchr(ref->name, ']');
1752 if (bracket)
1753 *bracket = '\0';
1754
1755 ref->addr = addr;
1756
1757 for (i = 0; i < MAP__NR_TYPES; ++i) {
1758 struct kmap *kmap = map__kmap(maps[i]);
1759
1760 if (!kmap)
1761 continue;
1762 kmap->ref_reloc_sym = ref;
1763 }
1764
1765 return 0;
1766 }
1767
1768 size_t perf_session__fprintf_dsos(struct perf_session *session, FILE *fp)
1769 {
1770 return machines__fprintf_dsos(&session->machines, fp);
1771 }
1772
1773 size_t perf_session__fprintf_dsos_buildid(struct perf_session *session, FILE *fp,
1774 bool (skip)(struct dso *dso, int parm), int parm)
1775 {
1776 return machines__fprintf_dsos_buildid(&session->machines, fp, skip, parm);
1777 }
1778
1779 size_t perf_session__fprintf_nr_events(struct perf_session *session, FILE *fp)
1780 {
1781 size_t ret;
1782 const char *msg = "";
1783
1784 if (perf_header__has_feat(&session->header, HEADER_AUXTRACE))
1785 msg = " (excludes AUX area (e.g. instruction trace) decoded / synthesized events)";
1786
1787 ret = fprintf(fp, "\nAggregated stats:%s\n", msg);
1788
1789 ret += events_stats__fprintf(&session->evlist->stats, fp);
1790 return ret;
1791 }
1792
1793 size_t perf_session__fprintf(struct perf_session *session, FILE *fp)
1794 {
1795 /*
1796 * FIXME: Here we have to actually print all the machines in this
1797 * session, not just the host...
1798 */
1799 return machine__fprintf(&session->machines.host, fp);
1800 }
1801
1802 struct perf_evsel *perf_session__find_first_evtype(struct perf_session *session,
1803 unsigned int type)
1804 {
1805 struct perf_evsel *pos;
1806
1807 evlist__for_each(session->evlist, pos) {
1808 if (pos->attr.type == type)
1809 return pos;
1810 }
1811 return NULL;
1812 }
1813
1814 void perf_evsel__print_ip(struct perf_evsel *evsel, struct perf_sample *sample,
1815 struct addr_location *al,
1816 unsigned int print_opts, unsigned int stack_depth)
1817 {
1818 struct callchain_cursor_node *node;
1819 int print_ip = print_opts & PRINT_IP_OPT_IP;
1820 int print_sym = print_opts & PRINT_IP_OPT_SYM;
1821 int print_dso = print_opts & PRINT_IP_OPT_DSO;
1822 int print_symoffset = print_opts & PRINT_IP_OPT_SYMOFFSET;
1823 int print_oneline = print_opts & PRINT_IP_OPT_ONELINE;
1824 int print_srcline = print_opts & PRINT_IP_OPT_SRCLINE;
1825 char s = print_oneline ? ' ' : '\t';
1826
1827 if (symbol_conf.use_callchain && sample->callchain) {
1828 struct addr_location node_al;
1829
1830 if (thread__resolve_callchain(al->thread, evsel,
1831 sample, NULL, NULL,
1832 stack_depth) != 0) {
1833 if (verbose)
1834 error("Failed to resolve callchain. Skipping\n");
1835 return;
1836 }
1837 callchain_cursor_commit(&callchain_cursor);
1838
1839 if (print_symoffset)
1840 node_al = *al;
1841
1842 while (stack_depth) {
1843 u64 addr = 0;
1844
1845 node = callchain_cursor_current(&callchain_cursor);
1846 if (!node)
1847 break;
1848
1849 if (node->sym && node->sym->ignore)
1850 goto next;
1851
1852 if (print_ip)
1853 printf("%c%16" PRIx64, s, node->ip);
1854
1855 if (node->map)
1856 addr = node->map->map_ip(node->map, node->ip);
1857
1858 if (print_sym) {
1859 printf(" ");
1860 if (print_symoffset) {
1861 node_al.addr = addr;
1862 node_al.map = node->map;
1863 symbol__fprintf_symname_offs(node->sym, &node_al, stdout);
1864 } else
1865 symbol__fprintf_symname(node->sym, stdout);
1866 }
1867
1868 if (print_dso) {
1869 printf(" (");
1870 map__fprintf_dsoname(node->map, stdout);
1871 printf(")");
1872 }
1873
1874 if (print_srcline)
1875 map__fprintf_srcline(node->map, addr, "\n ",
1876 stdout);
1877
1878 if (!print_oneline)
1879 printf("\n");
1880
1881 stack_depth--;
1882 next:
1883 callchain_cursor_advance(&callchain_cursor);
1884 }
1885
1886 } else {
1887 if (al->sym && al->sym->ignore)
1888 return;
1889
1890 if (print_ip)
1891 printf("%16" PRIx64, sample->ip);
1892
1893 if (print_sym) {
1894 printf(" ");
1895 if (print_symoffset)
1896 symbol__fprintf_symname_offs(al->sym, al,
1897 stdout);
1898 else
1899 symbol__fprintf_symname(al->sym, stdout);
1900 }
1901
1902 if (print_dso) {
1903 printf(" (");
1904 map__fprintf_dsoname(al->map, stdout);
1905 printf(")");
1906 }
1907
1908 if (print_srcline)
1909 map__fprintf_srcline(al->map, al->addr, "\n ", stdout);
1910 }
1911 }
1912
1913 int perf_session__cpu_bitmap(struct perf_session *session,
1914 const char *cpu_list, unsigned long *cpu_bitmap)
1915 {
1916 int i, err = -1;
1917 struct cpu_map *map;
1918
1919 for (i = 0; i < PERF_TYPE_MAX; ++i) {
1920 struct perf_evsel *evsel;
1921
1922 evsel = perf_session__find_first_evtype(session, i);
1923 if (!evsel)
1924 continue;
1925
1926 if (!(evsel->attr.sample_type & PERF_SAMPLE_CPU)) {
1927 pr_err("File does not contain CPU events. "
1928 "Remove -c option to proceed.\n");
1929 return -1;
1930 }
1931 }
1932
1933 map = cpu_map__new(cpu_list);
1934 if (map == NULL) {
1935 pr_err("Invalid cpu_list\n");
1936 return -1;
1937 }
1938
1939 for (i = 0; i < map->nr; i++) {
1940 int cpu = map->map[i];
1941
1942 if (cpu >= MAX_NR_CPUS) {
1943 pr_err("Requested CPU %d too large. "
1944 "Consider raising MAX_NR_CPUS\n", cpu);
1945 goto out_delete_map;
1946 }
1947
1948 set_bit(cpu, cpu_bitmap);
1949 }
1950
1951 err = 0;
1952
1953 out_delete_map:
1954 cpu_map__put(map);
1955 return err;
1956 }
1957
1958 void perf_session__fprintf_info(struct perf_session *session, FILE *fp,
1959 bool full)
1960 {
1961 struct stat st;
1962 int fd, ret;
1963
1964 if (session == NULL || fp == NULL)
1965 return;
1966
1967 fd = perf_data_file__fd(session->file);
1968
1969 ret = fstat(fd, &st);
1970 if (ret == -1)
1971 return;
1972
1973 fprintf(fp, "# ========\n");
1974 fprintf(fp, "# captured on: %s", ctime(&st.st_ctime));
1975 perf_header__fprintf_info(session, fp, full);
1976 fprintf(fp, "# ========\n#\n");
1977 }
1978
1979
1980 int __perf_session__set_tracepoints_handlers(struct perf_session *session,
1981 const struct perf_evsel_str_handler *assocs,
1982 size_t nr_assocs)
1983 {
1984 struct perf_evsel *evsel;
1985 size_t i;
1986 int err;
1987
1988 for (i = 0; i < nr_assocs; i++) {
1989 /*
1990 * Adding a handler for an event not in the session,
1991 * just ignore it.
1992 */
1993 evsel = perf_evlist__find_tracepoint_by_name(session->evlist, assocs[i].name);
1994 if (evsel == NULL)
1995 continue;
1996
1997 err = -EEXIST;
1998 if (evsel->handler != NULL)
1999 goto out;
2000 evsel->handler = assocs[i].handler;
2001 }
2002
2003 err = 0;
2004 out:
2005 return err;
2006 }
2007
2008 int perf_event__process_id_index(struct perf_tool *tool __maybe_unused,
2009 union perf_event *event,
2010 struct perf_session *session)
2011 {
2012 struct perf_evlist *evlist = session->evlist;
2013 struct id_index_event *ie = &event->id_index;
2014 size_t i, nr, max_nr;
2015
2016 max_nr = (ie->header.size - sizeof(struct id_index_event)) /
2017 sizeof(struct id_index_entry);
2018 nr = ie->nr;
2019 if (nr > max_nr)
2020 return -EINVAL;
2021
2022 if (dump_trace)
2023 fprintf(stdout, " nr: %zu\n", nr);
2024
2025 for (i = 0; i < nr; i++) {
2026 struct id_index_entry *e = &ie->entries[i];
2027 struct perf_sample_id *sid;
2028
2029 if (dump_trace) {
2030 fprintf(stdout, " ... id: %"PRIu64, e->id);
2031 fprintf(stdout, " idx: %"PRIu64, e->idx);
2032 fprintf(stdout, " cpu: %"PRId64, e->cpu);
2033 fprintf(stdout, " tid: %"PRId64"\n", e->tid);
2034 }
2035
2036 sid = perf_evlist__id2sid(evlist, e->id);
2037 if (!sid)
2038 return -ENOENT;
2039 sid->idx = e->idx;
2040 sid->cpu = e->cpu;
2041 sid->tid = e->tid;
2042 }
2043 return 0;
2044 }
2045
2046 int perf_event__synthesize_id_index(struct perf_tool *tool,
2047 perf_event__handler_t process,
2048 struct perf_evlist *evlist,
2049 struct machine *machine)
2050 {
2051 union perf_event *ev;
2052 struct perf_evsel *evsel;
2053 size_t nr = 0, i = 0, sz, max_nr, n;
2054 int err;
2055
2056 pr_debug2("Synthesizing id index\n");
2057
2058 max_nr = (UINT16_MAX - sizeof(struct id_index_event)) /
2059 sizeof(struct id_index_entry);
2060
2061 evlist__for_each(evlist, evsel)
2062 nr += evsel->ids;
2063
2064 n = nr > max_nr ? max_nr : nr;
2065 sz = sizeof(struct id_index_event) + n * sizeof(struct id_index_entry);
2066 ev = zalloc(sz);
2067 if (!ev)
2068 return -ENOMEM;
2069
2070 ev->id_index.header.type = PERF_RECORD_ID_INDEX;
2071 ev->id_index.header.size = sz;
2072 ev->id_index.nr = n;
2073
2074 evlist__for_each(evlist, evsel) {
2075 u32 j;
2076
2077 for (j = 0; j < evsel->ids; j++) {
2078 struct id_index_entry *e;
2079 struct perf_sample_id *sid;
2080
2081 if (i >= n) {
2082 err = process(tool, ev, NULL, machine);
2083 if (err)
2084 goto out_err;
2085 nr -= n;
2086 i = 0;
2087 }
2088
2089 e = &ev->id_index.entries[i++];
2090
2091 e->id = evsel->id[j];
2092
2093 sid = perf_evlist__id2sid(evlist, e->id);
2094 if (!sid) {
2095 free(ev);
2096 return -ENOENT;
2097 }
2098
2099 e->idx = sid->idx;
2100 e->cpu = sid->cpu;
2101 e->tid = sid->tid;
2102 }
2103 }
2104
2105 sz = sizeof(struct id_index_event) + nr * sizeof(struct id_index_entry);
2106 ev->id_index.header.size = sz;
2107 ev->id_index.nr = nr;
2108
2109 err = process(tool, ev, NULL, machine);
2110 out_err:
2111 free(ev);
2112
2113 return err;
2114 }
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