1 // SPDX-License-Identifier: GPL-2.0
5 #include <linux/kernel.h>
6 #include <linux/zalloc.h>
11 #include <sys/types.h>
13 #include <perf/cpumap.h>
15 #include "map_symbol.h"
25 #include "perf_regs.h"
29 #include "thread-stack.h"
30 #include "sample-raw.h"
32 #include "ui/progress.h"
34 #include "arch/common.h"
35 #include <internal/lib.h>
36 #include <linux/err.h>
38 #ifdef HAVE_ZSTD_SUPPORT
39 static int perf_session__process_compressed_event(struct perf_session *session,
40 union perf_event *event, u64 file_offset)
43 size_t decomp_size, src_size;
44 u64 decomp_last_rem = 0;
45 size_t mmap_len, decomp_len = session->header.env.comp_mmap_len;
46 struct decomp *decomp, *decomp_last = session->decomp_last;
49 decomp_last_rem = decomp_last->size - decomp_last->head;
50 decomp_len += decomp_last_rem;
53 mmap_len = sizeof(struct decomp) + decomp_len;
54 decomp = mmap(NULL, mmap_len, PROT_READ|PROT_WRITE,
55 MAP_ANONYMOUS|MAP_PRIVATE, -1, 0);
56 if (decomp == MAP_FAILED) {
57 pr_err("Couldn't allocate memory for decompression\n");
61 decomp->file_pos = file_offset;
62 decomp->mmap_len = mmap_len;
65 if (decomp_last_rem) {
66 memcpy(decomp->data, &(decomp_last->data[decomp_last->head]), decomp_last_rem);
67 decomp->size = decomp_last_rem;
70 src = (void *)event + sizeof(struct perf_record_compressed);
71 src_size = event->pack.header.size - sizeof(struct perf_record_compressed);
73 decomp_size = zstd_decompress_stream(&(session->zstd_data), src, src_size,
74 &(decomp->data[decomp_last_rem]), decomp_len - decomp_last_rem);
76 munmap(decomp, mmap_len);
77 pr_err("Couldn't decompress data\n");
81 decomp->size += decomp_size;
83 if (session->decomp == NULL) {
84 session->decomp = decomp;
85 session->decomp_last = decomp;
87 session->decomp_last->next = decomp;
88 session->decomp_last = decomp;
91 pr_debug("decomp (B): %ld to %ld\n", src_size, decomp_size);
95 #else /* !HAVE_ZSTD_SUPPORT */
96 #define perf_session__process_compressed_event perf_session__process_compressed_event_stub
99 static int perf_session__deliver_event(struct perf_session *session,
100 union perf_event *event,
101 struct perf_tool *tool,
104 static int perf_session__open(struct perf_session *session)
106 struct perf_data *data = session->data;
108 if (perf_session__read_header(session) < 0) {
109 pr_err("incompatible file format (rerun with -v to learn more)\n");
113 if (perf_data__is_pipe(data))
116 if (perf_header__has_feat(&session->header, HEADER_STAT))
119 if (!perf_evlist__valid_sample_type(session->evlist)) {
120 pr_err("non matching sample_type\n");
124 if (!perf_evlist__valid_sample_id_all(session->evlist)) {
125 pr_err("non matching sample_id_all\n");
129 if (!perf_evlist__valid_read_format(session->evlist)) {
130 pr_err("non matching read_format\n");
137 void perf_session__set_id_hdr_size(struct perf_session *session)
139 u16 id_hdr_size = perf_evlist__id_hdr_size(session->evlist);
141 machines__set_id_hdr_size(&session->machines, id_hdr_size);
144 int perf_session__create_kernel_maps(struct perf_session *session)
146 int ret = machine__create_kernel_maps(&session->machines.host);
149 ret = machines__create_guest_kernel_maps(&session->machines);
153 static void perf_session__destroy_kernel_maps(struct perf_session *session)
155 machines__destroy_kernel_maps(&session->machines);
158 static bool perf_session__has_comm_exec(struct perf_session *session)
162 evlist__for_each_entry(session->evlist, evsel) {
163 if (evsel->core.attr.comm_exec)
170 static void perf_session__set_comm_exec(struct perf_session *session)
172 bool comm_exec = perf_session__has_comm_exec(session);
174 machines__set_comm_exec(&session->machines, comm_exec);
177 static int ordered_events__deliver_event(struct ordered_events *oe,
178 struct ordered_event *event)
180 struct perf_session *session = container_of(oe, struct perf_session,
183 return perf_session__deliver_event(session, event->event,
184 session->tool, event->file_offset);
187 struct perf_session *perf_session__new(struct perf_data *data,
188 bool repipe, struct perf_tool *tool)
191 struct perf_session *session = zalloc(sizeof(*session));
196 session->repipe = repipe;
197 session->tool = tool;
198 INIT_LIST_HEAD(&session->auxtrace_index);
199 machines__init(&session->machines);
200 ordered_events__init(&session->ordered_events,
201 ordered_events__deliver_event, NULL);
203 perf_env__init(&session->header.env);
205 ret = perf_data__open(data);
209 session->data = data;
211 if (perf_data__is_read(data)) {
212 ret = perf_session__open(session);
217 * set session attributes that are present in perf.data
218 * but not in pipe-mode.
220 if (!data->is_pipe) {
221 perf_session__set_id_hdr_size(session);
222 perf_session__set_comm_exec(session);
225 perf_evlist__init_trace_event_sample_raw(session->evlist);
227 /* Open the directory data. */
229 ret = perf_data__open_dir(data);
235 session->machines.host.env = &perf_env;
238 session->machines.host.single_address_space =
239 perf_env__single_address_space(session->machines.host.env);
241 if (!data || perf_data__is_write(data)) {
243 * In O_RDONLY mode this will be performed when reading the
244 * kernel MMAP event, in perf_event__process_mmap().
246 if (perf_session__create_kernel_maps(session) < 0)
247 pr_warning("Cannot read kernel map\n");
251 * In pipe-mode, evlist is empty until PERF_RECORD_HEADER_ATTR is
252 * processed, so perf_evlist__sample_id_all is not meaningful here.
254 if ((!data || !data->is_pipe) && tool && tool->ordering_requires_timestamps &&
255 tool->ordered_events && !perf_evlist__sample_id_all(session->evlist)) {
256 dump_printf("WARNING: No sample_id_all support, falling back to unordered processing\n");
257 tool->ordered_events = false;
263 perf_session__delete(session);
268 static void perf_session__delete_threads(struct perf_session *session)
270 machine__delete_threads(&session->machines.host);
273 static void perf_session__release_decomp_events(struct perf_session *session)
275 struct decomp *next, *decomp;
277 next = session->decomp;
283 mmap_len = decomp->mmap_len;
284 munmap(decomp, mmap_len);
288 void perf_session__delete(struct perf_session *session)
292 auxtrace__free(session);
293 auxtrace_index__free(&session->auxtrace_index);
294 perf_session__destroy_kernel_maps(session);
295 perf_session__delete_threads(session);
296 perf_session__release_decomp_events(session);
297 perf_env__exit(&session->header.env);
298 machines__exit(&session->machines);
300 perf_data__close(session->data);
304 static int process_event_synth_tracing_data_stub(struct perf_session *session
306 union perf_event *event
309 dump_printf(": unhandled!\n");
313 static int process_event_synth_attr_stub(struct perf_tool *tool __maybe_unused,
314 union perf_event *event __maybe_unused,
315 struct evlist **pevlist
318 dump_printf(": unhandled!\n");
322 static int process_event_synth_event_update_stub(struct perf_tool *tool __maybe_unused,
323 union perf_event *event __maybe_unused,
324 struct evlist **pevlist
328 perf_event__fprintf_event_update(event, stdout);
330 dump_printf(": unhandled!\n");
334 static int process_event_sample_stub(struct perf_tool *tool __maybe_unused,
335 union perf_event *event __maybe_unused,
336 struct perf_sample *sample __maybe_unused,
337 struct evsel *evsel __maybe_unused,
338 struct machine *machine __maybe_unused)
340 dump_printf(": unhandled!\n");
344 static int process_event_stub(struct perf_tool *tool __maybe_unused,
345 union perf_event *event __maybe_unused,
346 struct perf_sample *sample __maybe_unused,
347 struct machine *machine __maybe_unused)
349 dump_printf(": unhandled!\n");
353 static int process_finished_round_stub(struct perf_tool *tool __maybe_unused,
354 union perf_event *event __maybe_unused,
355 struct ordered_events *oe __maybe_unused)
357 dump_printf(": unhandled!\n");
361 static int process_finished_round(struct perf_tool *tool,
362 union perf_event *event,
363 struct ordered_events *oe);
365 static int skipn(int fd, off_t n)
371 ret = read(fd, buf, min(n, (off_t)sizeof(buf)));
380 static s64 process_event_auxtrace_stub(struct perf_session *session __maybe_unused,
381 union perf_event *event)
383 dump_printf(": unhandled!\n");
384 if (perf_data__is_pipe(session->data))
385 skipn(perf_data__fd(session->data), event->auxtrace.size);
386 return event->auxtrace.size;
389 static int process_event_op2_stub(struct perf_session *session __maybe_unused,
390 union perf_event *event __maybe_unused)
392 dump_printf(": unhandled!\n");
398 int process_event_thread_map_stub(struct perf_session *session __maybe_unused,
399 union perf_event *event __maybe_unused)
402 perf_event__fprintf_thread_map(event, stdout);
404 dump_printf(": unhandled!\n");
409 int process_event_cpu_map_stub(struct perf_session *session __maybe_unused,
410 union perf_event *event __maybe_unused)
413 perf_event__fprintf_cpu_map(event, stdout);
415 dump_printf(": unhandled!\n");
420 int process_event_stat_config_stub(struct perf_session *session __maybe_unused,
421 union perf_event *event __maybe_unused)
424 perf_event__fprintf_stat_config(event, stdout);
426 dump_printf(": unhandled!\n");
430 static int process_stat_stub(struct perf_session *perf_session __maybe_unused,
431 union perf_event *event)
434 perf_event__fprintf_stat(event, stdout);
436 dump_printf(": unhandled!\n");
440 static int process_stat_round_stub(struct perf_session *perf_session __maybe_unused,
441 union perf_event *event)
444 perf_event__fprintf_stat_round(event, stdout);
446 dump_printf(": unhandled!\n");
450 static int perf_session__process_compressed_event_stub(struct perf_session *session __maybe_unused,
451 union perf_event *event __maybe_unused,
452 u64 file_offset __maybe_unused)
454 dump_printf(": unhandled!\n");
458 void perf_tool__fill_defaults(struct perf_tool *tool)
460 if (tool->sample == NULL)
461 tool->sample = process_event_sample_stub;
462 if (tool->mmap == NULL)
463 tool->mmap = process_event_stub;
464 if (tool->mmap2 == NULL)
465 tool->mmap2 = process_event_stub;
466 if (tool->comm == NULL)
467 tool->comm = process_event_stub;
468 if (tool->namespaces == NULL)
469 tool->namespaces = process_event_stub;
470 if (tool->fork == NULL)
471 tool->fork = process_event_stub;
472 if (tool->exit == NULL)
473 tool->exit = process_event_stub;
474 if (tool->lost == NULL)
475 tool->lost = perf_event__process_lost;
476 if (tool->lost_samples == NULL)
477 tool->lost_samples = perf_event__process_lost_samples;
478 if (tool->aux == NULL)
479 tool->aux = perf_event__process_aux;
480 if (tool->itrace_start == NULL)
481 tool->itrace_start = perf_event__process_itrace_start;
482 if (tool->context_switch == NULL)
483 tool->context_switch = perf_event__process_switch;
484 if (tool->ksymbol == NULL)
485 tool->ksymbol = perf_event__process_ksymbol;
486 if (tool->bpf == NULL)
487 tool->bpf = perf_event__process_bpf;
488 if (tool->read == NULL)
489 tool->read = process_event_sample_stub;
490 if (tool->throttle == NULL)
491 tool->throttle = process_event_stub;
492 if (tool->unthrottle == NULL)
493 tool->unthrottle = process_event_stub;
494 if (tool->attr == NULL)
495 tool->attr = process_event_synth_attr_stub;
496 if (tool->event_update == NULL)
497 tool->event_update = process_event_synth_event_update_stub;
498 if (tool->tracing_data == NULL)
499 tool->tracing_data = process_event_synth_tracing_data_stub;
500 if (tool->build_id == NULL)
501 tool->build_id = process_event_op2_stub;
502 if (tool->finished_round == NULL) {
503 if (tool->ordered_events)
504 tool->finished_round = process_finished_round;
506 tool->finished_round = process_finished_round_stub;
508 if (tool->id_index == NULL)
509 tool->id_index = process_event_op2_stub;
510 if (tool->auxtrace_info == NULL)
511 tool->auxtrace_info = process_event_op2_stub;
512 if (tool->auxtrace == NULL)
513 tool->auxtrace = process_event_auxtrace_stub;
514 if (tool->auxtrace_error == NULL)
515 tool->auxtrace_error = process_event_op2_stub;
516 if (tool->thread_map == NULL)
517 tool->thread_map = process_event_thread_map_stub;
518 if (tool->cpu_map == NULL)
519 tool->cpu_map = process_event_cpu_map_stub;
520 if (tool->stat_config == NULL)
521 tool->stat_config = process_event_stat_config_stub;
522 if (tool->stat == NULL)
523 tool->stat = process_stat_stub;
524 if (tool->stat_round == NULL)
525 tool->stat_round = process_stat_round_stub;
526 if (tool->time_conv == NULL)
527 tool->time_conv = process_event_op2_stub;
528 if (tool->feature == NULL)
529 tool->feature = process_event_op2_stub;
530 if (tool->compressed == NULL)
531 tool->compressed = perf_session__process_compressed_event;
534 static void swap_sample_id_all(union perf_event *event, void *data)
536 void *end = (void *) event + event->header.size;
537 int size = end - data;
539 BUG_ON(size % sizeof(u64));
540 mem_bswap_64(data, size);
543 static void perf_event__all64_swap(union perf_event *event,
544 bool sample_id_all __maybe_unused)
546 struct perf_event_header *hdr = &event->header;
547 mem_bswap_64(hdr + 1, event->header.size - sizeof(*hdr));
550 static void perf_event__comm_swap(union perf_event *event, bool sample_id_all)
552 event->comm.pid = bswap_32(event->comm.pid);
553 event->comm.tid = bswap_32(event->comm.tid);
556 void *data = &event->comm.comm;
558 data += PERF_ALIGN(strlen(data) + 1, sizeof(u64));
559 swap_sample_id_all(event, data);
563 static void perf_event__mmap_swap(union perf_event *event,
566 event->mmap.pid = bswap_32(event->mmap.pid);
567 event->mmap.tid = bswap_32(event->mmap.tid);
568 event->mmap.start = bswap_64(event->mmap.start);
569 event->mmap.len = bswap_64(event->mmap.len);
570 event->mmap.pgoff = bswap_64(event->mmap.pgoff);
573 void *data = &event->mmap.filename;
575 data += PERF_ALIGN(strlen(data) + 1, sizeof(u64));
576 swap_sample_id_all(event, data);
580 static void perf_event__mmap2_swap(union perf_event *event,
583 event->mmap2.pid = bswap_32(event->mmap2.pid);
584 event->mmap2.tid = bswap_32(event->mmap2.tid);
585 event->mmap2.start = bswap_64(event->mmap2.start);
586 event->mmap2.len = bswap_64(event->mmap2.len);
587 event->mmap2.pgoff = bswap_64(event->mmap2.pgoff);
588 event->mmap2.maj = bswap_32(event->mmap2.maj);
589 event->mmap2.min = bswap_32(event->mmap2.min);
590 event->mmap2.ino = bswap_64(event->mmap2.ino);
593 void *data = &event->mmap2.filename;
595 data += PERF_ALIGN(strlen(data) + 1, sizeof(u64));
596 swap_sample_id_all(event, data);
599 static void perf_event__task_swap(union perf_event *event, bool sample_id_all)
601 event->fork.pid = bswap_32(event->fork.pid);
602 event->fork.tid = bswap_32(event->fork.tid);
603 event->fork.ppid = bswap_32(event->fork.ppid);
604 event->fork.ptid = bswap_32(event->fork.ptid);
605 event->fork.time = bswap_64(event->fork.time);
608 swap_sample_id_all(event, &event->fork + 1);
611 static void perf_event__read_swap(union perf_event *event, bool sample_id_all)
613 event->read.pid = bswap_32(event->read.pid);
614 event->read.tid = bswap_32(event->read.tid);
615 event->read.value = bswap_64(event->read.value);
616 event->read.time_enabled = bswap_64(event->read.time_enabled);
617 event->read.time_running = bswap_64(event->read.time_running);
618 event->read.id = bswap_64(event->read.id);
621 swap_sample_id_all(event, &event->read + 1);
624 static void perf_event__aux_swap(union perf_event *event, bool sample_id_all)
626 event->aux.aux_offset = bswap_64(event->aux.aux_offset);
627 event->aux.aux_size = bswap_64(event->aux.aux_size);
628 event->aux.flags = bswap_64(event->aux.flags);
631 swap_sample_id_all(event, &event->aux + 1);
634 static void perf_event__itrace_start_swap(union perf_event *event,
637 event->itrace_start.pid = bswap_32(event->itrace_start.pid);
638 event->itrace_start.tid = bswap_32(event->itrace_start.tid);
641 swap_sample_id_all(event, &event->itrace_start + 1);
644 static void perf_event__switch_swap(union perf_event *event, bool sample_id_all)
646 if (event->header.type == PERF_RECORD_SWITCH_CPU_WIDE) {
647 event->context_switch.next_prev_pid =
648 bswap_32(event->context_switch.next_prev_pid);
649 event->context_switch.next_prev_tid =
650 bswap_32(event->context_switch.next_prev_tid);
654 swap_sample_id_all(event, &event->context_switch + 1);
657 static void perf_event__throttle_swap(union perf_event *event,
660 event->throttle.time = bswap_64(event->throttle.time);
661 event->throttle.id = bswap_64(event->throttle.id);
662 event->throttle.stream_id = bswap_64(event->throttle.stream_id);
665 swap_sample_id_all(event, &event->throttle + 1);
668 static void perf_event__namespaces_swap(union perf_event *event,
673 event->namespaces.pid = bswap_32(event->namespaces.pid);
674 event->namespaces.tid = bswap_32(event->namespaces.tid);
675 event->namespaces.nr_namespaces = bswap_64(event->namespaces.nr_namespaces);
677 for (i = 0; i < event->namespaces.nr_namespaces; i++) {
678 struct perf_ns_link_info *ns = &event->namespaces.link_info[i];
680 ns->dev = bswap_64(ns->dev);
681 ns->ino = bswap_64(ns->ino);
685 swap_sample_id_all(event, &event->namespaces.link_info[i]);
688 static u8 revbyte(u8 b)
690 int rev = (b >> 4) | ((b & 0xf) << 4);
691 rev = ((rev & 0xcc) >> 2) | ((rev & 0x33) << 2);
692 rev = ((rev & 0xaa) >> 1) | ((rev & 0x55) << 1);
697 * XXX this is hack in attempt to carry flags bitfield
698 * through endian village. ABI says:
700 * Bit-fields are allocated from right to left (least to most significant)
701 * on little-endian implementations and from left to right (most to least
702 * significant) on big-endian implementations.
704 * The above seems to be byte specific, so we need to reverse each
705 * byte of the bitfield. 'Internet' also says this might be implementation
706 * specific and we probably need proper fix and carry perf_event_attr
707 * bitfield flags in separate data file FEAT_ section. Thought this seems
710 static void swap_bitfield(u8 *p, unsigned len)
714 for (i = 0; i < len; i++) {
720 /* exported for swapping attributes in file header */
721 void perf_event__attr_swap(struct perf_event_attr *attr)
723 attr->type = bswap_32(attr->type);
724 attr->size = bswap_32(attr->size);
726 #define bswap_safe(f, n) \
727 (attr->size > (offsetof(struct perf_event_attr, f) + \
728 sizeof(attr->f) * (n)))
729 #define bswap_field(f, sz) \
731 if (bswap_safe(f, 0)) \
732 attr->f = bswap_##sz(attr->f); \
734 #define bswap_field_16(f) bswap_field(f, 16)
735 #define bswap_field_32(f) bswap_field(f, 32)
736 #define bswap_field_64(f) bswap_field(f, 64)
738 bswap_field_64(config);
739 bswap_field_64(sample_period);
740 bswap_field_64(sample_type);
741 bswap_field_64(read_format);
742 bswap_field_32(wakeup_events);
743 bswap_field_32(bp_type);
744 bswap_field_64(bp_addr);
745 bswap_field_64(bp_len);
746 bswap_field_64(branch_sample_type);
747 bswap_field_64(sample_regs_user);
748 bswap_field_32(sample_stack_user);
749 bswap_field_32(aux_watermark);
750 bswap_field_16(sample_max_stack);
753 * After read_format are bitfields. Check read_format because
754 * we are unable to use offsetof on bitfield.
756 if (bswap_safe(read_format, 1))
757 swap_bitfield((u8 *) (&attr->read_format + 1),
759 #undef bswap_field_64
760 #undef bswap_field_32
765 static void perf_event__hdr_attr_swap(union perf_event *event,
766 bool sample_id_all __maybe_unused)
770 perf_event__attr_swap(&event->attr.attr);
772 size = event->header.size;
773 size -= (void *)&event->attr.id - (void *)event;
774 mem_bswap_64(event->attr.id, size);
777 static void perf_event__event_update_swap(union perf_event *event,
778 bool sample_id_all __maybe_unused)
780 event->event_update.type = bswap_64(event->event_update.type);
781 event->event_update.id = bswap_64(event->event_update.id);
784 static void perf_event__event_type_swap(union perf_event *event,
785 bool sample_id_all __maybe_unused)
787 event->event_type.event_type.event_id =
788 bswap_64(event->event_type.event_type.event_id);
791 static void perf_event__tracing_data_swap(union perf_event *event,
792 bool sample_id_all __maybe_unused)
794 event->tracing_data.size = bswap_32(event->tracing_data.size);
797 static void perf_event__auxtrace_info_swap(union perf_event *event,
798 bool sample_id_all __maybe_unused)
802 event->auxtrace_info.type = bswap_32(event->auxtrace_info.type);
804 size = event->header.size;
805 size -= (void *)&event->auxtrace_info.priv - (void *)event;
806 mem_bswap_64(event->auxtrace_info.priv, size);
809 static void perf_event__auxtrace_swap(union perf_event *event,
810 bool sample_id_all __maybe_unused)
812 event->auxtrace.size = bswap_64(event->auxtrace.size);
813 event->auxtrace.offset = bswap_64(event->auxtrace.offset);
814 event->auxtrace.reference = bswap_64(event->auxtrace.reference);
815 event->auxtrace.idx = bswap_32(event->auxtrace.idx);
816 event->auxtrace.tid = bswap_32(event->auxtrace.tid);
817 event->auxtrace.cpu = bswap_32(event->auxtrace.cpu);
820 static void perf_event__auxtrace_error_swap(union perf_event *event,
821 bool sample_id_all __maybe_unused)
823 event->auxtrace_error.type = bswap_32(event->auxtrace_error.type);
824 event->auxtrace_error.code = bswap_32(event->auxtrace_error.code);
825 event->auxtrace_error.cpu = bswap_32(event->auxtrace_error.cpu);
826 event->auxtrace_error.pid = bswap_32(event->auxtrace_error.pid);
827 event->auxtrace_error.tid = bswap_32(event->auxtrace_error.tid);
828 event->auxtrace_error.fmt = bswap_32(event->auxtrace_error.fmt);
829 event->auxtrace_error.ip = bswap_64(event->auxtrace_error.ip);
830 if (event->auxtrace_error.fmt)
831 event->auxtrace_error.time = bswap_64(event->auxtrace_error.time);
834 static void perf_event__thread_map_swap(union perf_event *event,
835 bool sample_id_all __maybe_unused)
839 event->thread_map.nr = bswap_64(event->thread_map.nr);
841 for (i = 0; i < event->thread_map.nr; i++)
842 event->thread_map.entries[i].pid = bswap_64(event->thread_map.entries[i].pid);
845 static void perf_event__cpu_map_swap(union perf_event *event,
846 bool sample_id_all __maybe_unused)
848 struct perf_record_cpu_map_data *data = &event->cpu_map.data;
849 struct cpu_map_entries *cpus;
850 struct perf_record_record_cpu_map *mask;
853 data->type = bswap_64(data->type);
855 switch (data->type) {
856 case PERF_CPU_MAP__CPUS:
857 cpus = (struct cpu_map_entries *)data->data;
859 cpus->nr = bswap_16(cpus->nr);
861 for (i = 0; i < cpus->nr; i++)
862 cpus->cpu[i] = bswap_16(cpus->cpu[i]);
864 case PERF_CPU_MAP__MASK:
865 mask = (struct perf_record_record_cpu_map *)data->data;
867 mask->nr = bswap_16(mask->nr);
868 mask->long_size = bswap_16(mask->long_size);
870 switch (mask->long_size) {
871 case 4: mem_bswap_32(&mask->mask, mask->nr); break;
872 case 8: mem_bswap_64(&mask->mask, mask->nr); break;
874 pr_err("cpu_map swap: unsupported long size\n");
881 static void perf_event__stat_config_swap(union perf_event *event,
882 bool sample_id_all __maybe_unused)
886 size = event->stat_config.nr * sizeof(event->stat_config.data[0]);
887 size += 1; /* nr item itself */
888 mem_bswap_64(&event->stat_config.nr, size);
891 static void perf_event__stat_swap(union perf_event *event,
892 bool sample_id_all __maybe_unused)
894 event->stat.id = bswap_64(event->stat.id);
895 event->stat.thread = bswap_32(event->stat.thread);
896 event->stat.cpu = bswap_32(event->stat.cpu);
897 event->stat.val = bswap_64(event->stat.val);
898 event->stat.ena = bswap_64(event->stat.ena);
899 event->stat.run = bswap_64(event->stat.run);
902 static void perf_event__stat_round_swap(union perf_event *event,
903 bool sample_id_all __maybe_unused)
905 event->stat_round.type = bswap_64(event->stat_round.type);
906 event->stat_round.time = bswap_64(event->stat_round.time);
909 typedef void (*perf_event__swap_op)(union perf_event *event,
912 static perf_event__swap_op perf_event__swap_ops[] = {
913 [PERF_RECORD_MMAP] = perf_event__mmap_swap,
914 [PERF_RECORD_MMAP2] = perf_event__mmap2_swap,
915 [PERF_RECORD_COMM] = perf_event__comm_swap,
916 [PERF_RECORD_FORK] = perf_event__task_swap,
917 [PERF_RECORD_EXIT] = perf_event__task_swap,
918 [PERF_RECORD_LOST] = perf_event__all64_swap,
919 [PERF_RECORD_READ] = perf_event__read_swap,
920 [PERF_RECORD_THROTTLE] = perf_event__throttle_swap,
921 [PERF_RECORD_UNTHROTTLE] = perf_event__throttle_swap,
922 [PERF_RECORD_SAMPLE] = perf_event__all64_swap,
923 [PERF_RECORD_AUX] = perf_event__aux_swap,
924 [PERF_RECORD_ITRACE_START] = perf_event__itrace_start_swap,
925 [PERF_RECORD_LOST_SAMPLES] = perf_event__all64_swap,
926 [PERF_RECORD_SWITCH] = perf_event__switch_swap,
927 [PERF_RECORD_SWITCH_CPU_WIDE] = perf_event__switch_swap,
928 [PERF_RECORD_NAMESPACES] = perf_event__namespaces_swap,
929 [PERF_RECORD_HEADER_ATTR] = perf_event__hdr_attr_swap,
930 [PERF_RECORD_HEADER_EVENT_TYPE] = perf_event__event_type_swap,
931 [PERF_RECORD_HEADER_TRACING_DATA] = perf_event__tracing_data_swap,
932 [PERF_RECORD_HEADER_BUILD_ID] = NULL,
933 [PERF_RECORD_ID_INDEX] = perf_event__all64_swap,
934 [PERF_RECORD_AUXTRACE_INFO] = perf_event__auxtrace_info_swap,
935 [PERF_RECORD_AUXTRACE] = perf_event__auxtrace_swap,
936 [PERF_RECORD_AUXTRACE_ERROR] = perf_event__auxtrace_error_swap,
937 [PERF_RECORD_THREAD_MAP] = perf_event__thread_map_swap,
938 [PERF_RECORD_CPU_MAP] = perf_event__cpu_map_swap,
939 [PERF_RECORD_STAT_CONFIG] = perf_event__stat_config_swap,
940 [PERF_RECORD_STAT] = perf_event__stat_swap,
941 [PERF_RECORD_STAT_ROUND] = perf_event__stat_round_swap,
942 [PERF_RECORD_EVENT_UPDATE] = perf_event__event_update_swap,
943 [PERF_RECORD_TIME_CONV] = perf_event__all64_swap,
944 [PERF_RECORD_HEADER_MAX] = NULL,
948 * When perf record finishes a pass on every buffers, it records this pseudo
950 * We record the max timestamp t found in the pass n.
951 * Assuming these timestamps are monotonic across cpus, we know that if
952 * a buffer still has events with timestamps below t, they will be all
953 * available and then read in the pass n + 1.
954 * Hence when we start to read the pass n + 2, we can safely flush every
955 * events with timestamps below t.
957 * ============ PASS n =================
960 * cnt1 timestamps | cnt2 timestamps
963 * - | 4 <--- max recorded
965 * ============ PASS n + 1 ==============
968 * cnt1 timestamps | cnt2 timestamps
971 * 5 | 7 <---- max recorded
973 * Flush every events below timestamp 4
975 * ============ PASS n + 2 ==============
978 * cnt1 timestamps | cnt2 timestamps
983 * Flush every events below timestamp 7
986 static int process_finished_round(struct perf_tool *tool __maybe_unused,
987 union perf_event *event __maybe_unused,
988 struct ordered_events *oe)
991 fprintf(stdout, "\n");
992 return ordered_events__flush(oe, OE_FLUSH__ROUND);
995 int perf_session__queue_event(struct perf_session *s, union perf_event *event,
996 u64 timestamp, u64 file_offset)
998 return ordered_events__queue(&s->ordered_events, event, timestamp, file_offset);
1001 static void callchain__lbr_callstack_printf(struct perf_sample *sample)
1003 struct ip_callchain *callchain = sample->callchain;
1004 struct branch_stack *lbr_stack = sample->branch_stack;
1005 u64 kernel_callchain_nr = callchain->nr;
1008 for (i = 0; i < kernel_callchain_nr; i++) {
1009 if (callchain->ips[i] == PERF_CONTEXT_USER)
1013 if ((i != kernel_callchain_nr) && lbr_stack->nr) {
1016 * LBR callstack can only get user call chain,
1017 * i is kernel call chain number,
1018 * 1 is PERF_CONTEXT_USER.
1020 * The user call chain is stored in LBR registers.
1021 * LBR are pair registers. The caller is stored
1022 * in "from" register, while the callee is stored
1024 * For example, there is a call stack
1025 * "A"->"B"->"C"->"D".
1026 * The LBR registers will recorde like
1027 * "C"->"D", "B"->"C", "A"->"B".
1028 * So only the first "to" register and all "from"
1029 * registers are needed to construct the whole stack.
1031 total_nr = i + 1 + lbr_stack->nr + 1;
1032 kernel_callchain_nr = i + 1;
1034 printf("... LBR call chain: nr:%" PRIu64 "\n", total_nr);
1036 for (i = 0; i < kernel_callchain_nr; i++)
1037 printf("..... %2d: %016" PRIx64 "\n",
1038 i, callchain->ips[i]);
1040 printf("..... %2d: %016" PRIx64 "\n",
1041 (int)(kernel_callchain_nr), lbr_stack->entries[0].to);
1042 for (i = 0; i < lbr_stack->nr; i++)
1043 printf("..... %2d: %016" PRIx64 "\n",
1044 (int)(i + kernel_callchain_nr + 1), lbr_stack->entries[i].from);
1048 static void callchain__printf(struct evsel *evsel,
1049 struct perf_sample *sample)
1052 struct ip_callchain *callchain = sample->callchain;
1054 if (perf_evsel__has_branch_callstack(evsel))
1055 callchain__lbr_callstack_printf(sample);
1057 printf("... FP chain: nr:%" PRIu64 "\n", callchain->nr);
1059 for (i = 0; i < callchain->nr; i++)
1060 printf("..... %2d: %016" PRIx64 "\n",
1061 i, callchain->ips[i]);
1064 static void branch_stack__printf(struct perf_sample *sample, bool callstack)
1068 printf("%s: nr:%" PRIu64 "\n",
1069 !callstack ? "... branch stack" : "... branch callstack",
1070 sample->branch_stack->nr);
1072 for (i = 0; i < sample->branch_stack->nr; i++) {
1073 struct branch_entry *e = &sample->branch_stack->entries[i];
1076 printf("..... %2"PRIu64": %016" PRIx64 " -> %016" PRIx64 " %hu cycles %s%s%s%s %x\n",
1078 (unsigned short)e->flags.cycles,
1079 e->flags.mispred ? "M" : " ",
1080 e->flags.predicted ? "P" : " ",
1081 e->flags.abort ? "A" : " ",
1082 e->flags.in_tx ? "T" : " ",
1083 (unsigned)e->flags.reserved);
1085 printf("..... %2"PRIu64": %016" PRIx64 "\n",
1086 i, i > 0 ? e->from : e->to);
1091 static void regs_dump__printf(u64 mask, u64 *regs)
1093 unsigned rid, i = 0;
1095 for_each_set_bit(rid, (unsigned long *) &mask, sizeof(mask) * 8) {
1096 u64 val = regs[i++];
1098 printf(".... %-5s 0x%" PRIx64 "\n",
1099 perf_reg_name(rid), val);
1103 static const char *regs_abi[] = {
1104 [PERF_SAMPLE_REGS_ABI_NONE] = "none",
1105 [PERF_SAMPLE_REGS_ABI_32] = "32-bit",
1106 [PERF_SAMPLE_REGS_ABI_64] = "64-bit",
1109 static inline const char *regs_dump_abi(struct regs_dump *d)
1111 if (d->abi > PERF_SAMPLE_REGS_ABI_64)
1114 return regs_abi[d->abi];
1117 static void regs__printf(const char *type, struct regs_dump *regs)
1119 u64 mask = regs->mask;
1121 printf("... %s regs: mask 0x%" PRIx64 " ABI %s\n",
1124 regs_dump_abi(regs));
1126 regs_dump__printf(mask, regs->regs);
1129 static void regs_user__printf(struct perf_sample *sample)
1131 struct regs_dump *user_regs = &sample->user_regs;
1133 if (user_regs->regs)
1134 regs__printf("user", user_regs);
1137 static void regs_intr__printf(struct perf_sample *sample)
1139 struct regs_dump *intr_regs = &sample->intr_regs;
1141 if (intr_regs->regs)
1142 regs__printf("intr", intr_regs);
1145 static void stack_user__printf(struct stack_dump *dump)
1147 printf("... ustack: size %" PRIu64 ", offset 0x%x\n",
1148 dump->size, dump->offset);
1151 static void perf_evlist__print_tstamp(struct evlist *evlist,
1152 union perf_event *event,
1153 struct perf_sample *sample)
1155 u64 sample_type = __perf_evlist__combined_sample_type(evlist);
1157 if (event->header.type != PERF_RECORD_SAMPLE &&
1158 !perf_evlist__sample_id_all(evlist)) {
1159 fputs("-1 -1 ", stdout);
1163 if ((sample_type & PERF_SAMPLE_CPU))
1164 printf("%u ", sample->cpu);
1166 if (sample_type & PERF_SAMPLE_TIME)
1167 printf("%" PRIu64 " ", sample->time);
1170 static void sample_read__printf(struct perf_sample *sample, u64 read_format)
1172 printf("... sample_read:\n");
1174 if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED)
1175 printf("...... time enabled %016" PRIx64 "\n",
1176 sample->read.time_enabled);
1178 if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING)
1179 printf("...... time running %016" PRIx64 "\n",
1180 sample->read.time_running);
1182 if (read_format & PERF_FORMAT_GROUP) {
1185 printf(".... group nr %" PRIu64 "\n", sample->read.group.nr);
1187 for (i = 0; i < sample->read.group.nr; i++) {
1188 struct sample_read_value *value;
1190 value = &sample->read.group.values[i];
1191 printf("..... id %016" PRIx64
1192 ", value %016" PRIx64 "\n",
1193 value->id, value->value);
1196 printf("..... id %016" PRIx64 ", value %016" PRIx64 "\n",
1197 sample->read.one.id, sample->read.one.value);
1200 static void dump_event(struct evlist *evlist, union perf_event *event,
1201 u64 file_offset, struct perf_sample *sample)
1206 printf("\n%#" PRIx64 " [%#x]: event: %d\n",
1207 file_offset, event->header.size, event->header.type);
1210 if (event->header.type == PERF_RECORD_SAMPLE && evlist->trace_event_sample_raw)
1211 evlist->trace_event_sample_raw(evlist, event, sample);
1214 perf_evlist__print_tstamp(evlist, event, sample);
1216 printf("%#" PRIx64 " [%#x]: PERF_RECORD_%s", file_offset,
1217 event->header.size, perf_event__name(event->header.type));
1220 static void dump_sample(struct evsel *evsel, union perf_event *event,
1221 struct perf_sample *sample)
1228 printf("(IP, 0x%x): %d/%d: %#" PRIx64 " period: %" PRIu64 " addr: %#" PRIx64 "\n",
1229 event->header.misc, sample->pid, sample->tid, sample->ip,
1230 sample->period, sample->addr);
1232 sample_type = evsel->core.attr.sample_type;
1234 if (evsel__has_callchain(evsel))
1235 callchain__printf(evsel, sample);
1237 if (sample_type & PERF_SAMPLE_BRANCH_STACK)
1238 branch_stack__printf(sample, perf_evsel__has_branch_callstack(evsel));
1240 if (sample_type & PERF_SAMPLE_REGS_USER)
1241 regs_user__printf(sample);
1243 if (sample_type & PERF_SAMPLE_REGS_INTR)
1244 regs_intr__printf(sample);
1246 if (sample_type & PERF_SAMPLE_STACK_USER)
1247 stack_user__printf(&sample->user_stack);
1249 if (sample_type & PERF_SAMPLE_WEIGHT)
1250 printf("... weight: %" PRIu64 "\n", sample->weight);
1252 if (sample_type & PERF_SAMPLE_DATA_SRC)
1253 printf(" . data_src: 0x%"PRIx64"\n", sample->data_src);
1255 if (sample_type & PERF_SAMPLE_PHYS_ADDR)
1256 printf(" .. phys_addr: 0x%"PRIx64"\n", sample->phys_addr);
1258 if (sample_type & PERF_SAMPLE_TRANSACTION)
1259 printf("... transaction: %" PRIx64 "\n", sample->transaction);
1261 if (sample_type & PERF_SAMPLE_READ)
1262 sample_read__printf(sample, evsel->core.attr.read_format);
1265 static void dump_read(struct evsel *evsel, union perf_event *event)
1267 struct perf_record_read *read_event = &event->read;
1273 printf(": %d %d %s %" PRI_lu64 "\n", event->read.pid, event->read.tid,
1274 perf_evsel__name(evsel),
1280 read_format = evsel->core.attr.read_format;
1282 if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED)
1283 printf("... time enabled : %" PRI_lu64 "\n", read_event->time_enabled);
1285 if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING)
1286 printf("... time running : %" PRI_lu64 "\n", read_event->time_running);
1288 if (read_format & PERF_FORMAT_ID)
1289 printf("... id : %" PRI_lu64 "\n", read_event->id);
1292 static struct machine *machines__find_for_cpumode(struct machines *machines,
1293 union perf_event *event,
1294 struct perf_sample *sample)
1296 struct machine *machine;
1299 ((sample->cpumode == PERF_RECORD_MISC_GUEST_KERNEL) ||
1300 (sample->cpumode == PERF_RECORD_MISC_GUEST_USER))) {
1303 if (event->header.type == PERF_RECORD_MMAP
1304 || event->header.type == PERF_RECORD_MMAP2)
1305 pid = event->mmap.pid;
1309 machine = machines__find(machines, pid);
1311 machine = machines__findnew(machines, DEFAULT_GUEST_KERNEL_ID);
1315 return &machines->host;
1318 static int deliver_sample_value(struct evlist *evlist,
1319 struct perf_tool *tool,
1320 union perf_event *event,
1321 struct perf_sample *sample,
1322 struct sample_read_value *v,
1323 struct machine *machine)
1325 struct perf_sample_id *sid = perf_evlist__id2sid(evlist, v->id);
1326 struct evsel *evsel;
1330 sample->period = v->value - sid->period;
1331 sid->period = v->value;
1334 if (!sid || sid->evsel == NULL) {
1335 ++evlist->stats.nr_unknown_id;
1340 * There's no reason to deliver sample
1341 * for zero period, bail out.
1343 if (!sample->period)
1346 evsel = container_of(sid->evsel, struct evsel, core);
1347 return tool->sample(tool, event, sample, evsel, machine);
1350 static int deliver_sample_group(struct evlist *evlist,
1351 struct perf_tool *tool,
1352 union perf_event *event,
1353 struct perf_sample *sample,
1354 struct machine *machine)
1359 for (i = 0; i < sample->read.group.nr; i++) {
1360 ret = deliver_sample_value(evlist, tool, event, sample,
1361 &sample->read.group.values[i],
1371 perf_evlist__deliver_sample(struct evlist *evlist,
1372 struct perf_tool *tool,
1373 union perf_event *event,
1374 struct perf_sample *sample,
1375 struct evsel *evsel,
1376 struct machine *machine)
1378 /* We know evsel != NULL. */
1379 u64 sample_type = evsel->core.attr.sample_type;
1380 u64 read_format = evsel->core.attr.read_format;
1382 /* Standard sample delivery. */
1383 if (!(sample_type & PERF_SAMPLE_READ))
1384 return tool->sample(tool, event, sample, evsel, machine);
1386 /* For PERF_SAMPLE_READ we have either single or group mode. */
1387 if (read_format & PERF_FORMAT_GROUP)
1388 return deliver_sample_group(evlist, tool, event, sample,
1391 return deliver_sample_value(evlist, tool, event, sample,
1392 &sample->read.one, machine);
1395 static int machines__deliver_event(struct machines *machines,
1396 struct evlist *evlist,
1397 union perf_event *event,
1398 struct perf_sample *sample,
1399 struct perf_tool *tool, u64 file_offset)
1401 struct evsel *evsel;
1402 struct machine *machine;
1404 dump_event(evlist, event, file_offset, sample);
1406 evsel = perf_evlist__id2evsel(evlist, sample->id);
1408 machine = machines__find_for_cpumode(machines, event, sample);
1410 switch (event->header.type) {
1411 case PERF_RECORD_SAMPLE:
1412 if (evsel == NULL) {
1413 ++evlist->stats.nr_unknown_id;
1416 dump_sample(evsel, event, sample);
1417 if (machine == NULL) {
1418 ++evlist->stats.nr_unprocessable_samples;
1421 return perf_evlist__deliver_sample(evlist, tool, event, sample, evsel, machine);
1422 case PERF_RECORD_MMAP:
1423 return tool->mmap(tool, event, sample, machine);
1424 case PERF_RECORD_MMAP2:
1425 if (event->header.misc & PERF_RECORD_MISC_PROC_MAP_PARSE_TIMEOUT)
1426 ++evlist->stats.nr_proc_map_timeout;
1427 return tool->mmap2(tool, event, sample, machine);
1428 case PERF_RECORD_COMM:
1429 return tool->comm(tool, event, sample, machine);
1430 case PERF_RECORD_NAMESPACES:
1431 return tool->namespaces(tool, event, sample, machine);
1432 case PERF_RECORD_FORK:
1433 return tool->fork(tool, event, sample, machine);
1434 case PERF_RECORD_EXIT:
1435 return tool->exit(tool, event, sample, machine);
1436 case PERF_RECORD_LOST:
1437 if (tool->lost == perf_event__process_lost)
1438 evlist->stats.total_lost += event->lost.lost;
1439 return tool->lost(tool, event, sample, machine);
1440 case PERF_RECORD_LOST_SAMPLES:
1441 if (tool->lost_samples == perf_event__process_lost_samples)
1442 evlist->stats.total_lost_samples += event->lost_samples.lost;
1443 return tool->lost_samples(tool, event, sample, machine);
1444 case PERF_RECORD_READ:
1445 dump_read(evsel, event);
1446 return tool->read(tool, event, sample, evsel, machine);
1447 case PERF_RECORD_THROTTLE:
1448 return tool->throttle(tool, event, sample, machine);
1449 case PERF_RECORD_UNTHROTTLE:
1450 return tool->unthrottle(tool, event, sample, machine);
1451 case PERF_RECORD_AUX:
1452 if (tool->aux == perf_event__process_aux) {
1453 if (event->aux.flags & PERF_AUX_FLAG_TRUNCATED)
1454 evlist->stats.total_aux_lost += 1;
1455 if (event->aux.flags & PERF_AUX_FLAG_PARTIAL)
1456 evlist->stats.total_aux_partial += 1;
1458 return tool->aux(tool, event, sample, machine);
1459 case PERF_RECORD_ITRACE_START:
1460 return tool->itrace_start(tool, event, sample, machine);
1461 case PERF_RECORD_SWITCH:
1462 case PERF_RECORD_SWITCH_CPU_WIDE:
1463 return tool->context_switch(tool, event, sample, machine);
1464 case PERF_RECORD_KSYMBOL:
1465 return tool->ksymbol(tool, event, sample, machine);
1466 case PERF_RECORD_BPF_EVENT:
1467 return tool->bpf(tool, event, sample, machine);
1469 ++evlist->stats.nr_unknown_events;
1474 static int perf_session__deliver_event(struct perf_session *session,
1475 union perf_event *event,
1476 struct perf_tool *tool,
1479 struct perf_sample sample;
1482 ret = perf_evlist__parse_sample(session->evlist, event, &sample);
1484 pr_err("Can't parse sample, err = %d\n", ret);
1488 ret = auxtrace__process_event(session, event, &sample, tool);
1494 return machines__deliver_event(&session->machines, session->evlist,
1495 event, &sample, tool, file_offset);
1498 static s64 perf_session__process_user_event(struct perf_session *session,
1499 union perf_event *event,
1502 struct ordered_events *oe = &session->ordered_events;
1503 struct perf_tool *tool = session->tool;
1504 struct perf_sample sample = { .time = 0, };
1505 int fd = perf_data__fd(session->data);
1508 if (event->header.type != PERF_RECORD_COMPRESSED ||
1509 tool->compressed == perf_session__process_compressed_event_stub)
1510 dump_event(session->evlist, event, file_offset, &sample);
1512 /* These events are processed right away */
1513 switch (event->header.type) {
1514 case PERF_RECORD_HEADER_ATTR:
1515 err = tool->attr(tool, event, &session->evlist);
1517 perf_session__set_id_hdr_size(session);
1518 perf_session__set_comm_exec(session);
1521 case PERF_RECORD_EVENT_UPDATE:
1522 return tool->event_update(tool, event, &session->evlist);
1523 case PERF_RECORD_HEADER_EVENT_TYPE:
1525 * Depreceated, but we need to handle it for sake
1526 * of old data files create in pipe mode.
1529 case PERF_RECORD_HEADER_TRACING_DATA:
1530 /* setup for reading amidst mmap */
1531 lseek(fd, file_offset, SEEK_SET);
1532 return tool->tracing_data(session, event);
1533 case PERF_RECORD_HEADER_BUILD_ID:
1534 return tool->build_id(session, event);
1535 case PERF_RECORD_FINISHED_ROUND:
1536 return tool->finished_round(tool, event, oe);
1537 case PERF_RECORD_ID_INDEX:
1538 return tool->id_index(session, event);
1539 case PERF_RECORD_AUXTRACE_INFO:
1540 return tool->auxtrace_info(session, event);
1541 case PERF_RECORD_AUXTRACE:
1542 /* setup for reading amidst mmap */
1543 lseek(fd, file_offset + event->header.size, SEEK_SET);
1544 return tool->auxtrace(session, event);
1545 case PERF_RECORD_AUXTRACE_ERROR:
1546 perf_session__auxtrace_error_inc(session, event);
1547 return tool->auxtrace_error(session, event);
1548 case PERF_RECORD_THREAD_MAP:
1549 return tool->thread_map(session, event);
1550 case PERF_RECORD_CPU_MAP:
1551 return tool->cpu_map(session, event);
1552 case PERF_RECORD_STAT_CONFIG:
1553 return tool->stat_config(session, event);
1554 case PERF_RECORD_STAT:
1555 return tool->stat(session, event);
1556 case PERF_RECORD_STAT_ROUND:
1557 return tool->stat_round(session, event);
1558 case PERF_RECORD_TIME_CONV:
1559 session->time_conv = event->time_conv;
1560 return tool->time_conv(session, event);
1561 case PERF_RECORD_HEADER_FEATURE:
1562 return tool->feature(session, event);
1563 case PERF_RECORD_COMPRESSED:
1564 err = tool->compressed(session, event, file_offset);
1566 dump_event(session->evlist, event, file_offset, &sample);
1573 int perf_session__deliver_synth_event(struct perf_session *session,
1574 union perf_event *event,
1575 struct perf_sample *sample)
1577 struct evlist *evlist = session->evlist;
1578 struct perf_tool *tool = session->tool;
1580 events_stats__inc(&evlist->stats, event->header.type);
1582 if (event->header.type >= PERF_RECORD_USER_TYPE_START)
1583 return perf_session__process_user_event(session, event, 0);
1585 return machines__deliver_event(&session->machines, evlist, event, sample, tool, 0);
1588 static void event_swap(union perf_event *event, bool sample_id_all)
1590 perf_event__swap_op swap;
1592 swap = perf_event__swap_ops[event->header.type];
1594 swap(event, sample_id_all);
1597 int perf_session__peek_event(struct perf_session *session, off_t file_offset,
1598 void *buf, size_t buf_sz,
1599 union perf_event **event_ptr,
1600 struct perf_sample *sample)
1602 union perf_event *event;
1603 size_t hdr_sz, rest;
1606 if (session->one_mmap && !session->header.needs_swap) {
1607 event = file_offset - session->one_mmap_offset +
1608 session->one_mmap_addr;
1609 goto out_parse_sample;
1612 if (perf_data__is_pipe(session->data))
1615 fd = perf_data__fd(session->data);
1616 hdr_sz = sizeof(struct perf_event_header);
1618 if (buf_sz < hdr_sz)
1621 if (lseek(fd, file_offset, SEEK_SET) == (off_t)-1 ||
1622 readn(fd, buf, hdr_sz) != (ssize_t)hdr_sz)
1625 event = (union perf_event *)buf;
1627 if (session->header.needs_swap)
1628 perf_event_header__bswap(&event->header);
1630 if (event->header.size < hdr_sz || event->header.size > buf_sz)
1633 rest = event->header.size - hdr_sz;
1635 if (readn(fd, buf, rest) != (ssize_t)rest)
1638 if (session->header.needs_swap)
1639 event_swap(event, perf_evlist__sample_id_all(session->evlist));
1643 if (sample && event->header.type < PERF_RECORD_USER_TYPE_START &&
1644 perf_evlist__parse_sample(session->evlist, event, sample))
1652 static s64 perf_session__process_event(struct perf_session *session,
1653 union perf_event *event, u64 file_offset)
1655 struct evlist *evlist = session->evlist;
1656 struct perf_tool *tool = session->tool;
1659 if (session->header.needs_swap)
1660 event_swap(event, perf_evlist__sample_id_all(evlist));
1662 if (event->header.type >= PERF_RECORD_HEADER_MAX)
1665 events_stats__inc(&evlist->stats, event->header.type);
1667 if (event->header.type >= PERF_RECORD_USER_TYPE_START)
1668 return perf_session__process_user_event(session, event, file_offset);
1670 if (tool->ordered_events) {
1671 u64 timestamp = -1ULL;
1673 ret = perf_evlist__parse_sample_timestamp(evlist, event, ×tamp);
1674 if (ret && ret != -1)
1677 ret = perf_session__queue_event(session, event, timestamp, file_offset);
1682 return perf_session__deliver_event(session, event, tool, file_offset);
1685 void perf_event_header__bswap(struct perf_event_header *hdr)
1687 hdr->type = bswap_32(hdr->type);
1688 hdr->misc = bswap_16(hdr->misc);
1689 hdr->size = bswap_16(hdr->size);
1692 struct thread *perf_session__findnew(struct perf_session *session, pid_t pid)
1694 return machine__findnew_thread(&session->machines.host, -1, pid);
1698 * Threads are identified by pid and tid, and the idle task has pid == tid == 0.
1699 * So here a single thread is created for that, but actually there is a separate
1700 * idle task per cpu, so there should be one 'struct thread' per cpu, but there
1701 * is only 1. That causes problems for some tools, requiring workarounds. For
1702 * example get_idle_thread() in builtin-sched.c, or thread_stack__per_cpu().
1704 int perf_session__register_idle_thread(struct perf_session *session)
1706 struct thread *thread;
1709 thread = machine__findnew_thread(&session->machines.host, 0, 0);
1710 if (thread == NULL || thread__set_comm(thread, "swapper", 0)) {
1711 pr_err("problem inserting idle task.\n");
1715 if (thread == NULL || thread__set_namespaces(thread, 0, NULL)) {
1716 pr_err("problem inserting idle task.\n");
1720 /* machine__findnew_thread() got the thread, so put it */
1721 thread__put(thread);
1726 perf_session__warn_order(const struct perf_session *session)
1728 const struct ordered_events *oe = &session->ordered_events;
1729 struct evsel *evsel;
1730 bool should_warn = true;
1732 evlist__for_each_entry(session->evlist, evsel) {
1733 if (evsel->core.attr.write_backward)
1734 should_warn = false;
1739 if (oe->nr_unordered_events != 0)
1740 ui__warning("%u out of order events recorded.\n", oe->nr_unordered_events);
1743 static void perf_session__warn_about_errors(const struct perf_session *session)
1745 const struct events_stats *stats = &session->evlist->stats;
1747 if (session->tool->lost == perf_event__process_lost &&
1748 stats->nr_events[PERF_RECORD_LOST] != 0) {
1749 ui__warning("Processed %d events and lost %d chunks!\n\n"
1750 "Check IO/CPU overload!\n\n",
1751 stats->nr_events[0],
1752 stats->nr_events[PERF_RECORD_LOST]);
1755 if (session->tool->lost_samples == perf_event__process_lost_samples) {
1758 drop_rate = (double)stats->total_lost_samples /
1759 (double) (stats->nr_events[PERF_RECORD_SAMPLE] + stats->total_lost_samples);
1760 if (drop_rate > 0.05) {
1761 ui__warning("Processed %" PRIu64 " samples and lost %3.2f%%!\n\n",
1762 stats->nr_events[PERF_RECORD_SAMPLE] + stats->total_lost_samples,
1767 if (session->tool->aux == perf_event__process_aux &&
1768 stats->total_aux_lost != 0) {
1769 ui__warning("AUX data lost %" PRIu64 " times out of %u!\n\n",
1770 stats->total_aux_lost,
1771 stats->nr_events[PERF_RECORD_AUX]);
1774 if (session->tool->aux == perf_event__process_aux &&
1775 stats->total_aux_partial != 0) {
1776 bool vmm_exclusive = false;
1778 (void)sysfs__read_bool("module/kvm_intel/parameters/vmm_exclusive",
1781 ui__warning("AUX data had gaps in it %" PRIu64 " times out of %u!\n\n"
1782 "Are you running a KVM guest in the background?%s\n\n",
1783 stats->total_aux_partial,
1784 stats->nr_events[PERF_RECORD_AUX],
1786 "\nReloading kvm_intel module with vmm_exclusive=0\n"
1787 "will reduce the gaps to only guest's timeslices." :
1791 if (stats->nr_unknown_events != 0) {
1792 ui__warning("Found %u unknown events!\n\n"
1793 "Is this an older tool processing a perf.data "
1794 "file generated by a more recent tool?\n\n"
1795 "If that is not the case, consider "
1796 "reporting to linux-kernel@vger.kernel.org.\n\n",
1797 stats->nr_unknown_events);
1800 if (stats->nr_unknown_id != 0) {
1801 ui__warning("%u samples with id not present in the header\n",
1802 stats->nr_unknown_id);
1805 if (stats->nr_invalid_chains != 0) {
1806 ui__warning("Found invalid callchains!\n\n"
1807 "%u out of %u events were discarded for this reason.\n\n"
1808 "Consider reporting to linux-kernel@vger.kernel.org.\n\n",
1809 stats->nr_invalid_chains,
1810 stats->nr_events[PERF_RECORD_SAMPLE]);
1813 if (stats->nr_unprocessable_samples != 0) {
1814 ui__warning("%u unprocessable samples recorded.\n"
1815 "Do you have a KVM guest running and not using 'perf kvm'?\n",
1816 stats->nr_unprocessable_samples);
1819 perf_session__warn_order(session);
1821 events_stats__auxtrace_error_warn(stats);
1823 if (stats->nr_proc_map_timeout != 0) {
1824 ui__warning("%d map information files for pre-existing threads were\n"
1825 "not processed, if there are samples for addresses they\n"
1826 "will not be resolved, you may find out which are these\n"
1827 "threads by running with -v and redirecting the output\n"
1829 "The time limit to process proc map is too short?\n"
1830 "Increase it by --proc-map-timeout\n",
1831 stats->nr_proc_map_timeout);
1835 static int perf_session__flush_thread_stack(struct thread *thread,
1836 void *p __maybe_unused)
1838 return thread_stack__flush(thread);
1841 static int perf_session__flush_thread_stacks(struct perf_session *session)
1843 return machines__for_each_thread(&session->machines,
1844 perf_session__flush_thread_stack,
1848 volatile int session_done;
1850 static int __perf_session__process_decomp_events(struct perf_session *session);
1852 static int __perf_session__process_pipe_events(struct perf_session *session)
1854 struct ordered_events *oe = &session->ordered_events;
1855 struct perf_tool *tool = session->tool;
1856 int fd = perf_data__fd(session->data);
1857 union perf_event *event;
1858 uint32_t size, cur_size = 0;
1865 perf_tool__fill_defaults(tool);
1868 cur_size = sizeof(union perf_event);
1870 buf = malloc(cur_size);
1873 ordered_events__set_copy_on_queue(oe, true);
1876 err = readn(fd, event, sizeof(struct perf_event_header));
1881 pr_err("failed to read event header\n");
1885 if (session->header.needs_swap)
1886 perf_event_header__bswap(&event->header);
1888 size = event->header.size;
1889 if (size < sizeof(struct perf_event_header)) {
1890 pr_err("bad event header size\n");
1894 if (size > cur_size) {
1895 void *new = realloc(buf, size);
1897 pr_err("failed to allocate memory to read event\n");
1905 p += sizeof(struct perf_event_header);
1907 if (size - sizeof(struct perf_event_header)) {
1908 err = readn(fd, p, size - sizeof(struct perf_event_header));
1911 pr_err("unexpected end of event stream\n");
1915 pr_err("failed to read event data\n");
1920 if ((skip = perf_session__process_event(session, event, head)) < 0) {
1921 pr_err("%#" PRIx64 " [%#x]: failed to process type: %d\n",
1922 head, event->header.size, event->header.type);
1932 err = __perf_session__process_decomp_events(session);
1936 if (!session_done())
1939 /* do the final flush for ordered samples */
1940 err = ordered_events__flush(oe, OE_FLUSH__FINAL);
1943 err = auxtrace__flush_events(session, tool);
1946 err = perf_session__flush_thread_stacks(session);
1950 perf_session__warn_about_errors(session);
1951 ordered_events__free(&session->ordered_events);
1952 auxtrace__free_events(session);
1956 static union perf_event *
1957 fetch_mmaped_event(struct perf_session *session,
1958 u64 head, size_t mmap_size, char *buf)
1960 union perf_event *event;
1963 * Ensure we have enough space remaining to read
1964 * the size of the event in the headers.
1966 if (head + sizeof(event->header) > mmap_size)
1969 event = (union perf_event *)(buf + head);
1971 if (session->header.needs_swap)
1972 perf_event_header__bswap(&event->header);
1974 if (head + event->header.size > mmap_size) {
1975 /* We're not fetching the event so swap back again */
1976 if (session->header.needs_swap)
1977 perf_event_header__bswap(&event->header);
1978 pr_debug("%s: head=%#" PRIx64 " event->header_size=%#x, mmap_size=%#zx: fuzzed perf.data?\n",
1979 __func__, head, event->header.size, mmap_size);
1980 return ERR_PTR(-EINVAL);
1986 static int __perf_session__process_decomp_events(struct perf_session *session)
1989 u64 size, file_pos = 0;
1990 struct decomp *decomp = session->decomp_last;
1995 while (decomp->head < decomp->size && !session_done()) {
1996 union perf_event *event = fetch_mmaped_event(session, decomp->head, decomp->size, decomp->data);
1999 return PTR_ERR(event);
2004 size = event->header.size;
2006 if (size < sizeof(struct perf_event_header) ||
2007 (skip = perf_session__process_event(session, event, file_pos)) < 0) {
2008 pr_err("%#" PRIx64 " [%#x]: failed to process type: %d\n",
2009 decomp->file_pos + decomp->head, event->header.size, event->header.type);
2016 decomp->head += size;
2023 * On 64bit we can mmap the data file in one go. No need for tiny mmap
2024 * slices. On 32bit we use 32MB.
2026 #if BITS_PER_LONG == 64
2027 #define MMAP_SIZE ULLONG_MAX
2030 #define MMAP_SIZE (32 * 1024 * 1024ULL)
2031 #define NUM_MMAPS 128
2036 typedef s64 (*reader_cb_t)(struct perf_session *session,
2037 union perf_event *event,
2044 reader_cb_t process;
2048 reader__process_events(struct reader *rd, struct perf_session *session,
2049 struct ui_progress *prog)
2051 u64 data_size = rd->data_size;
2052 u64 head, page_offset, file_offset, file_pos, size;
2053 int err = 0, mmap_prot, mmap_flags, map_idx = 0;
2055 char *buf, *mmaps[NUM_MMAPS];
2056 union perf_event *event;
2059 page_offset = page_size * (rd->data_offset / page_size);
2060 file_offset = page_offset;
2061 head = rd->data_offset - page_offset;
2063 ui_progress__init_size(prog, data_size, "Processing events...");
2065 data_size += rd->data_offset;
2067 mmap_size = MMAP_SIZE;
2068 if (mmap_size > data_size) {
2069 mmap_size = data_size;
2070 session->one_mmap = true;
2073 memset(mmaps, 0, sizeof(mmaps));
2075 mmap_prot = PROT_READ;
2076 mmap_flags = MAP_SHARED;
2078 if (session->header.needs_swap) {
2079 mmap_prot |= PROT_WRITE;
2080 mmap_flags = MAP_PRIVATE;
2083 buf = mmap(NULL, mmap_size, mmap_prot, mmap_flags, rd->fd,
2085 if (buf == MAP_FAILED) {
2086 pr_err("failed to mmap file\n");
2090 mmaps[map_idx] = buf;
2091 map_idx = (map_idx + 1) & (ARRAY_SIZE(mmaps) - 1);
2092 file_pos = file_offset + head;
2093 if (session->one_mmap) {
2094 session->one_mmap_addr = buf;
2095 session->one_mmap_offset = file_offset;
2099 event = fetch_mmaped_event(session, head, mmap_size, buf);
2101 return PTR_ERR(event);
2104 if (mmaps[map_idx]) {
2105 munmap(mmaps[map_idx], mmap_size);
2106 mmaps[map_idx] = NULL;
2109 page_offset = page_size * (head / page_size);
2110 file_offset += page_offset;
2111 head -= page_offset;
2115 size = event->header.size;
2119 if (size < sizeof(struct perf_event_header) ||
2120 (skip = rd->process(session, event, file_pos)) < 0) {
2121 pr_err("%#" PRIx64 " [%#x]: failed to process type: %d [%s]\n",
2122 file_offset + head, event->header.size,
2123 event->header.type, strerror(-skip));
2134 err = __perf_session__process_decomp_events(session);
2138 ui_progress__update(prog, size);
2143 if (file_pos < data_size)
2150 static s64 process_simple(struct perf_session *session,
2151 union perf_event *event,
2154 return perf_session__process_event(session, event, file_offset);
2157 static int __perf_session__process_events(struct perf_session *session)
2159 struct reader rd = {
2160 .fd = perf_data__fd(session->data),
2161 .data_size = session->header.data_size,
2162 .data_offset = session->header.data_offset,
2163 .process = process_simple,
2165 struct ordered_events *oe = &session->ordered_events;
2166 struct perf_tool *tool = session->tool;
2167 struct ui_progress prog;
2170 perf_tool__fill_defaults(tool);
2172 if (rd.data_size == 0)
2175 ui_progress__init_size(&prog, rd.data_size, "Processing events...");
2177 err = reader__process_events(&rd, session, &prog);
2180 /* do the final flush for ordered samples */
2181 err = ordered_events__flush(oe, OE_FLUSH__FINAL);
2184 err = auxtrace__flush_events(session, tool);
2187 err = perf_session__flush_thread_stacks(session);
2189 ui_progress__finish();
2191 perf_session__warn_about_errors(session);
2193 * We may switching perf.data output, make ordered_events
2196 ordered_events__reinit(&session->ordered_events);
2197 auxtrace__free_events(session);
2198 session->one_mmap = false;
2202 int perf_session__process_events(struct perf_session *session)
2204 if (perf_session__register_idle_thread(session) < 0)
2207 if (perf_data__is_pipe(session->data))
2208 return __perf_session__process_pipe_events(session);
2210 return __perf_session__process_events(session);
2213 bool perf_session__has_traces(struct perf_session *session, const char *msg)
2215 struct evsel *evsel;
2217 evlist__for_each_entry(session->evlist, evsel) {
2218 if (evsel->core.attr.type == PERF_TYPE_TRACEPOINT)
2222 pr_err("No trace sample to read. Did you call 'perf %s'?\n", msg);
2226 int map__set_kallsyms_ref_reloc_sym(struct map *map, const char *symbol_name, u64 addr)
2229 struct ref_reloc_sym *ref;
2232 ref = zalloc(sizeof(struct ref_reloc_sym));
2236 ref->name = strdup(symbol_name);
2237 if (ref->name == NULL) {
2242 bracket = strchr(ref->name, ']');
2248 kmap = map__kmap(map);
2250 kmap->ref_reloc_sym = ref;
2255 size_t perf_session__fprintf_dsos(struct perf_session *session, FILE *fp)
2257 return machines__fprintf_dsos(&session->machines, fp);
2260 size_t perf_session__fprintf_dsos_buildid(struct perf_session *session, FILE *fp,
2261 bool (skip)(struct dso *dso, int parm), int parm)
2263 return machines__fprintf_dsos_buildid(&session->machines, fp, skip, parm);
2266 size_t perf_session__fprintf_nr_events(struct perf_session *session, FILE *fp)
2269 const char *msg = "";
2271 if (perf_header__has_feat(&session->header, HEADER_AUXTRACE))
2272 msg = " (excludes AUX area (e.g. instruction trace) decoded / synthesized events)";
2274 ret = fprintf(fp, "\nAggregated stats:%s\n", msg);
2276 ret += events_stats__fprintf(&session->evlist->stats, fp);
2280 size_t perf_session__fprintf(struct perf_session *session, FILE *fp)
2283 * FIXME: Here we have to actually print all the machines in this
2284 * session, not just the host...
2286 return machine__fprintf(&session->machines.host, fp);
2289 struct evsel *perf_session__find_first_evtype(struct perf_session *session,
2294 evlist__for_each_entry(session->evlist, pos) {
2295 if (pos->core.attr.type == type)
2301 int perf_session__cpu_bitmap(struct perf_session *session,
2302 const char *cpu_list, unsigned long *cpu_bitmap)
2305 struct perf_cpu_map *map;
2306 int nr_cpus = min(session->header.env.nr_cpus_online, MAX_NR_CPUS);
2308 for (i = 0; i < PERF_TYPE_MAX; ++i) {
2309 struct evsel *evsel;
2311 evsel = perf_session__find_first_evtype(session, i);
2315 if (!(evsel->core.attr.sample_type & PERF_SAMPLE_CPU)) {
2316 pr_err("File does not contain CPU events. "
2317 "Remove -C option to proceed.\n");
2322 map = perf_cpu_map__new(cpu_list);
2324 pr_err("Invalid cpu_list\n");
2328 for (i = 0; i < map->nr; i++) {
2329 int cpu = map->map[i];
2331 if (cpu >= nr_cpus) {
2332 pr_err("Requested CPU %d too large. "
2333 "Consider raising MAX_NR_CPUS\n", cpu);
2334 goto out_delete_map;
2337 set_bit(cpu, cpu_bitmap);
2343 perf_cpu_map__put(map);
2347 void perf_session__fprintf_info(struct perf_session *session, FILE *fp,
2350 if (session == NULL || fp == NULL)
2353 fprintf(fp, "# ========\n");
2354 perf_header__fprintf_info(session, fp, full);
2355 fprintf(fp, "# ========\n#\n");
2359 int __perf_session__set_tracepoints_handlers(struct perf_session *session,
2360 const struct evsel_str_handler *assocs,
2363 struct evsel *evsel;
2367 for (i = 0; i < nr_assocs; i++) {
2369 * Adding a handler for an event not in the session,
2372 evsel = perf_evlist__find_tracepoint_by_name(session->evlist, assocs[i].name);
2377 if (evsel->handler != NULL)
2379 evsel->handler = assocs[i].handler;
2387 int perf_event__process_id_index(struct perf_session *session,
2388 union perf_event *event)
2390 struct evlist *evlist = session->evlist;
2391 struct perf_record_id_index *ie = &event->id_index;
2392 size_t i, nr, max_nr;
2394 max_nr = (ie->header.size - sizeof(struct perf_record_id_index)) /
2395 sizeof(struct id_index_entry);
2401 fprintf(stdout, " nr: %zu\n", nr);
2403 for (i = 0; i < nr; i++) {
2404 struct id_index_entry *e = &ie->entries[i];
2405 struct perf_sample_id *sid;
2408 fprintf(stdout, " ... id: %"PRI_lu64, e->id);
2409 fprintf(stdout, " idx: %"PRI_lu64, e->idx);
2410 fprintf(stdout, " cpu: %"PRI_ld64, e->cpu);
2411 fprintf(stdout, " tid: %"PRI_ld64"\n", e->tid);
2414 sid = perf_evlist__id2sid(evlist, e->id);