2 * auxtrace.c: AUX area trace support
3 * Copyright (c) 2013-2015, Intel Corporation.
5 * This program is free software; you can redistribute it and/or modify it
6 * under the terms and conditions of the GNU General Public License,
7 * version 2, as published by the Free Software Foundation.
9 * This program is distributed in the hope it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
16 #include <sys/types.h>
20 #include <linux/kernel.h>
21 #include <linux/perf_event.h>
22 #include <linux/types.h>
23 #include <linux/bitops.h>
24 #include <linux/log2.h>
25 #include <linux/string.h>
27 #include <sys/param.h>
33 #include <linux/list.h>
39 #include "thread_map.h"
43 #include <linux/hash.h>
48 #include "parse-options.h"
51 #include "intel-bts.h"
53 int auxtrace_mmap__mmap(struct auxtrace_mmap *mm,
54 struct auxtrace_mmap_params *mp,
57 struct perf_event_mmap_page *pc = userpg;
59 WARN_ONCE(mm->base, "Uninitialized auxtrace_mmap\n");
74 #if BITS_PER_LONG != 64 && !defined(HAVE_SYNC_COMPARE_AND_SWAP_SUPPORT)
75 pr_err("Cannot use AUX area tracing mmaps\n");
79 pc->aux_offset = mp->offset;
80 pc->aux_size = mp->len;
82 mm->base = mmap(NULL, mp->len, mp->prot, MAP_SHARED, fd, mp->offset);
83 if (mm->base == MAP_FAILED) {
84 pr_debug2("failed to mmap AUX area\n");
92 void auxtrace_mmap__munmap(struct auxtrace_mmap *mm)
95 munmap(mm->base, mm->len);
100 void auxtrace_mmap_params__init(struct auxtrace_mmap_params *mp,
101 off_t auxtrace_offset,
102 unsigned int auxtrace_pages,
103 bool auxtrace_overwrite)
105 if (auxtrace_pages) {
106 mp->offset = auxtrace_offset;
107 mp->len = auxtrace_pages * (size_t)page_size;
108 mp->mask = is_power_of_2(mp->len) ? mp->len - 1 : 0;
109 mp->prot = PROT_READ | (auxtrace_overwrite ? 0 : PROT_WRITE);
110 pr_debug2("AUX area mmap length %zu\n", mp->len);
116 void auxtrace_mmap_params__set_idx(struct auxtrace_mmap_params *mp,
117 struct perf_evlist *evlist, int idx,
123 mp->cpu = evlist->cpus->map[idx];
125 mp->tid = thread_map__pid(evlist->threads, 0);
130 mp->tid = thread_map__pid(evlist->threads, idx);
134 #define AUXTRACE_INIT_NR_QUEUES 32
136 static struct auxtrace_queue *auxtrace_alloc_queue_array(unsigned int nr_queues)
138 struct auxtrace_queue *queue_array;
139 unsigned int max_nr_queues, i;
141 max_nr_queues = UINT_MAX / sizeof(struct auxtrace_queue);
142 if (nr_queues > max_nr_queues)
145 queue_array = calloc(nr_queues, sizeof(struct auxtrace_queue));
149 for (i = 0; i < nr_queues; i++) {
150 INIT_LIST_HEAD(&queue_array[i].head);
151 queue_array[i].priv = NULL;
157 int auxtrace_queues__init(struct auxtrace_queues *queues)
159 queues->nr_queues = AUXTRACE_INIT_NR_QUEUES;
160 queues->queue_array = auxtrace_alloc_queue_array(queues->nr_queues);
161 if (!queues->queue_array)
166 static int auxtrace_queues__grow(struct auxtrace_queues *queues,
167 unsigned int new_nr_queues)
169 unsigned int nr_queues = queues->nr_queues;
170 struct auxtrace_queue *queue_array;
174 nr_queues = AUXTRACE_INIT_NR_QUEUES;
176 while (nr_queues && nr_queues < new_nr_queues)
179 if (nr_queues < queues->nr_queues || nr_queues < new_nr_queues)
182 queue_array = auxtrace_alloc_queue_array(nr_queues);
186 for (i = 0; i < queues->nr_queues; i++) {
187 list_splice_tail(&queues->queue_array[i].head,
188 &queue_array[i].head);
189 queue_array[i].tid = queues->queue_array[i].tid;
190 queue_array[i].cpu = queues->queue_array[i].cpu;
191 queue_array[i].set = queues->queue_array[i].set;
192 queue_array[i].priv = queues->queue_array[i].priv;
195 queues->nr_queues = nr_queues;
196 queues->queue_array = queue_array;
201 static void *auxtrace_copy_data(u64 size, struct perf_session *session)
203 int fd = perf_data_file__fd(session->file);
207 if (size > SSIZE_MAX)
214 ret = readn(fd, p, size);
215 if (ret != (ssize_t)size) {
223 static int auxtrace_queues__add_buffer(struct auxtrace_queues *queues,
225 struct auxtrace_buffer *buffer)
227 struct auxtrace_queue *queue;
230 if (idx >= queues->nr_queues) {
231 err = auxtrace_queues__grow(queues, idx + 1);
236 queue = &queues->queue_array[idx];
240 queue->tid = buffer->tid;
241 queue->cpu = buffer->cpu;
244 buffer->buffer_nr = queues->next_buffer_nr++;
246 list_add_tail(&buffer->list, &queue->head);
248 queues->new_data = true;
249 queues->populated = true;
254 /* Limit buffers to 32MiB on 32-bit */
255 #define BUFFER_LIMIT_FOR_32_BIT (32 * 1024 * 1024)
257 static int auxtrace_queues__split_buffer(struct auxtrace_queues *queues,
259 struct auxtrace_buffer *buffer)
261 u64 sz = buffer->size;
262 bool consecutive = false;
263 struct auxtrace_buffer *b;
266 while (sz > BUFFER_LIMIT_FOR_32_BIT) {
267 b = memdup(buffer, sizeof(struct auxtrace_buffer));
270 b->size = BUFFER_LIMIT_FOR_32_BIT;
271 b->consecutive = consecutive;
272 err = auxtrace_queues__add_buffer(queues, idx, b);
274 auxtrace_buffer__free(b);
277 buffer->data_offset += BUFFER_LIMIT_FOR_32_BIT;
278 sz -= BUFFER_LIMIT_FOR_32_BIT;
283 buffer->consecutive = consecutive;
288 static int auxtrace_queues__add_event_buffer(struct auxtrace_queues *queues,
289 struct perf_session *session,
291 struct auxtrace_buffer *buffer)
293 if (session->one_mmap) {
294 buffer->data = buffer->data_offset - session->one_mmap_offset +
295 session->one_mmap_addr;
296 } else if (perf_data_file__is_pipe(session->file)) {
297 buffer->data = auxtrace_copy_data(buffer->size, session);
300 buffer->data_needs_freeing = true;
301 } else if (BITS_PER_LONG == 32 &&
302 buffer->size > BUFFER_LIMIT_FOR_32_BIT) {
305 err = auxtrace_queues__split_buffer(queues, idx, buffer);
310 return auxtrace_queues__add_buffer(queues, idx, buffer);
313 int auxtrace_queues__add_event(struct auxtrace_queues *queues,
314 struct perf_session *session,
315 union perf_event *event, off_t data_offset,
316 struct auxtrace_buffer **buffer_ptr)
318 struct auxtrace_buffer *buffer;
322 buffer = zalloc(sizeof(struct auxtrace_buffer));
327 buffer->tid = event->auxtrace.tid;
328 buffer->cpu = event->auxtrace.cpu;
329 buffer->data_offset = data_offset;
330 buffer->offset = event->auxtrace.offset;
331 buffer->reference = event->auxtrace.reference;
332 buffer->size = event->auxtrace.size;
333 idx = event->auxtrace.idx;
335 err = auxtrace_queues__add_event_buffer(queues, session, idx, buffer);
340 *buffer_ptr = buffer;
345 auxtrace_buffer__free(buffer);
349 static int auxtrace_queues__add_indexed_event(struct auxtrace_queues *queues,
350 struct perf_session *session,
351 off_t file_offset, size_t sz)
353 union perf_event *event;
355 char buf[PERF_SAMPLE_MAX_SIZE];
357 err = perf_session__peek_event(session, file_offset, buf,
358 PERF_SAMPLE_MAX_SIZE, &event, NULL);
362 if (event->header.type == PERF_RECORD_AUXTRACE) {
363 if (event->header.size < sizeof(struct auxtrace_event) ||
364 event->header.size != sz) {
368 file_offset += event->header.size;
369 err = auxtrace_queues__add_event(queues, session, event,
376 void auxtrace_queues__free(struct auxtrace_queues *queues)
380 for (i = 0; i < queues->nr_queues; i++) {
381 while (!list_empty(&queues->queue_array[i].head)) {
382 struct auxtrace_buffer *buffer;
384 buffer = list_entry(queues->queue_array[i].head.next,
385 struct auxtrace_buffer, list);
386 list_del(&buffer->list);
387 auxtrace_buffer__free(buffer);
391 zfree(&queues->queue_array);
392 queues->nr_queues = 0;
395 static void auxtrace_heapify(struct auxtrace_heap_item *heap_array,
396 unsigned int pos, unsigned int queue_nr,
402 parent = (pos - 1) >> 1;
403 if (heap_array[parent].ordinal <= ordinal)
405 heap_array[pos] = heap_array[parent];
408 heap_array[pos].queue_nr = queue_nr;
409 heap_array[pos].ordinal = ordinal;
412 int auxtrace_heap__add(struct auxtrace_heap *heap, unsigned int queue_nr,
415 struct auxtrace_heap_item *heap_array;
417 if (queue_nr >= heap->heap_sz) {
418 unsigned int heap_sz = AUXTRACE_INIT_NR_QUEUES;
420 while (heap_sz <= queue_nr)
422 heap_array = realloc(heap->heap_array,
423 heap_sz * sizeof(struct auxtrace_heap_item));
426 heap->heap_array = heap_array;
427 heap->heap_sz = heap_sz;
430 auxtrace_heapify(heap->heap_array, heap->heap_cnt++, queue_nr, ordinal);
435 void auxtrace_heap__free(struct auxtrace_heap *heap)
437 zfree(&heap->heap_array);
442 void auxtrace_heap__pop(struct auxtrace_heap *heap)
444 unsigned int pos, last, heap_cnt = heap->heap_cnt;
445 struct auxtrace_heap_item *heap_array;
452 heap_array = heap->heap_array;
456 unsigned int left, right;
458 left = (pos << 1) + 1;
459 if (left >= heap_cnt)
462 if (right >= heap_cnt) {
463 heap_array[pos] = heap_array[left];
466 if (heap_array[left].ordinal < heap_array[right].ordinal) {
467 heap_array[pos] = heap_array[left];
470 heap_array[pos] = heap_array[right];
476 auxtrace_heapify(heap_array, pos, heap_array[last].queue_nr,
477 heap_array[last].ordinal);
480 size_t auxtrace_record__info_priv_size(struct auxtrace_record *itr)
483 return itr->info_priv_size(itr);
487 static int auxtrace_not_supported(void)
489 pr_err("AUX area tracing is not supported on this architecture\n");
493 int auxtrace_record__info_fill(struct auxtrace_record *itr,
494 struct perf_session *session,
495 struct auxtrace_info_event *auxtrace_info,
499 return itr->info_fill(itr, session, auxtrace_info, priv_size);
500 return auxtrace_not_supported();
503 void auxtrace_record__free(struct auxtrace_record *itr)
509 int auxtrace_record__snapshot_start(struct auxtrace_record *itr)
511 if (itr && itr->snapshot_start)
512 return itr->snapshot_start(itr);
516 int auxtrace_record__snapshot_finish(struct auxtrace_record *itr)
518 if (itr && itr->snapshot_finish)
519 return itr->snapshot_finish(itr);
523 int auxtrace_record__find_snapshot(struct auxtrace_record *itr, int idx,
524 struct auxtrace_mmap *mm,
525 unsigned char *data, u64 *head, u64 *old)
527 if (itr && itr->find_snapshot)
528 return itr->find_snapshot(itr, idx, mm, data, head, old);
532 int auxtrace_record__options(struct auxtrace_record *itr,
533 struct perf_evlist *evlist,
534 struct record_opts *opts)
537 return itr->recording_options(itr, evlist, opts);
541 u64 auxtrace_record__reference(struct auxtrace_record *itr)
544 return itr->reference(itr);
548 int auxtrace_parse_snapshot_options(struct auxtrace_record *itr,
549 struct record_opts *opts, const char *str)
555 return itr->parse_snapshot_options(itr, opts, str);
557 pr_err("No AUX area tracing to snapshot\n");
561 struct auxtrace_record *__weak
562 auxtrace_record__init(struct perf_evlist *evlist __maybe_unused, int *err)
568 static int auxtrace_index__alloc(struct list_head *head)
570 struct auxtrace_index *auxtrace_index;
572 auxtrace_index = malloc(sizeof(struct auxtrace_index));
576 auxtrace_index->nr = 0;
577 INIT_LIST_HEAD(&auxtrace_index->list);
579 list_add_tail(&auxtrace_index->list, head);
584 void auxtrace_index__free(struct list_head *head)
586 struct auxtrace_index *auxtrace_index, *n;
588 list_for_each_entry_safe(auxtrace_index, n, head, list) {
589 list_del(&auxtrace_index->list);
590 free(auxtrace_index);
594 static struct auxtrace_index *auxtrace_index__last(struct list_head *head)
596 struct auxtrace_index *auxtrace_index;
599 if (list_empty(head)) {
600 err = auxtrace_index__alloc(head);
605 auxtrace_index = list_entry(head->prev, struct auxtrace_index, list);
607 if (auxtrace_index->nr >= PERF_AUXTRACE_INDEX_ENTRY_COUNT) {
608 err = auxtrace_index__alloc(head);
611 auxtrace_index = list_entry(head->prev, struct auxtrace_index,
615 return auxtrace_index;
618 int auxtrace_index__auxtrace_event(struct list_head *head,
619 union perf_event *event, off_t file_offset)
621 struct auxtrace_index *auxtrace_index;
624 auxtrace_index = auxtrace_index__last(head);
628 nr = auxtrace_index->nr;
629 auxtrace_index->entries[nr].file_offset = file_offset;
630 auxtrace_index->entries[nr].sz = event->header.size;
631 auxtrace_index->nr += 1;
636 static int auxtrace_index__do_write(int fd,
637 struct auxtrace_index *auxtrace_index)
639 struct auxtrace_index_entry ent;
642 for (i = 0; i < auxtrace_index->nr; i++) {
643 ent.file_offset = auxtrace_index->entries[i].file_offset;
644 ent.sz = auxtrace_index->entries[i].sz;
645 if (writen(fd, &ent, sizeof(ent)) != sizeof(ent))
651 int auxtrace_index__write(int fd, struct list_head *head)
653 struct auxtrace_index *auxtrace_index;
657 list_for_each_entry(auxtrace_index, head, list)
658 total += auxtrace_index->nr;
660 if (writen(fd, &total, sizeof(total)) != sizeof(total))
663 list_for_each_entry(auxtrace_index, head, list) {
664 err = auxtrace_index__do_write(fd, auxtrace_index);
672 static int auxtrace_index__process_entry(int fd, struct list_head *head,
675 struct auxtrace_index *auxtrace_index;
676 struct auxtrace_index_entry ent;
679 if (readn(fd, &ent, sizeof(ent)) != sizeof(ent))
682 auxtrace_index = auxtrace_index__last(head);
686 nr = auxtrace_index->nr;
688 auxtrace_index->entries[nr].file_offset =
689 bswap_64(ent.file_offset);
690 auxtrace_index->entries[nr].sz = bswap_64(ent.sz);
692 auxtrace_index->entries[nr].file_offset = ent.file_offset;
693 auxtrace_index->entries[nr].sz = ent.sz;
696 auxtrace_index->nr = nr + 1;
701 int auxtrace_index__process(int fd, u64 size, struct perf_session *session,
704 struct list_head *head = &session->auxtrace_index;
707 if (readn(fd, &nr, sizeof(u64)) != sizeof(u64))
713 if (sizeof(u64) + nr * sizeof(struct auxtrace_index_entry) > size)
719 err = auxtrace_index__process_entry(fd, head, needs_swap);
727 static int auxtrace_queues__process_index_entry(struct auxtrace_queues *queues,
728 struct perf_session *session,
729 struct auxtrace_index_entry *ent)
731 return auxtrace_queues__add_indexed_event(queues, session,
732 ent->file_offset, ent->sz);
735 int auxtrace_queues__process_index(struct auxtrace_queues *queues,
736 struct perf_session *session)
738 struct auxtrace_index *auxtrace_index;
739 struct auxtrace_index_entry *ent;
743 list_for_each_entry(auxtrace_index, &session->auxtrace_index, list) {
744 for (i = 0; i < auxtrace_index->nr; i++) {
745 ent = &auxtrace_index->entries[i];
746 err = auxtrace_queues__process_index_entry(queues,
756 struct auxtrace_buffer *auxtrace_buffer__next(struct auxtrace_queue *queue,
757 struct auxtrace_buffer *buffer)
760 if (list_is_last(&buffer->list, &queue->head))
762 return list_entry(buffer->list.next, struct auxtrace_buffer,
765 if (list_empty(&queue->head))
767 return list_entry(queue->head.next, struct auxtrace_buffer,
772 void *auxtrace_buffer__get_data(struct auxtrace_buffer *buffer, int fd)
774 size_t adj = buffer->data_offset & (page_size - 1);
775 size_t size = buffer->size + adj;
776 off_t file_offset = buffer->data_offset - adj;
782 addr = mmap(NULL, size, PROT_READ, MAP_SHARED, fd, file_offset);
783 if (addr == MAP_FAILED)
786 buffer->mmap_addr = addr;
787 buffer->mmap_size = size;
789 buffer->data = addr + adj;
794 void auxtrace_buffer__put_data(struct auxtrace_buffer *buffer)
796 if (!buffer->data || !buffer->mmap_addr)
798 munmap(buffer->mmap_addr, buffer->mmap_size);
799 buffer->mmap_addr = NULL;
800 buffer->mmap_size = 0;
802 buffer->use_data = NULL;
805 void auxtrace_buffer__drop_data(struct auxtrace_buffer *buffer)
807 auxtrace_buffer__put_data(buffer);
808 if (buffer->data_needs_freeing) {
809 buffer->data_needs_freeing = false;
810 zfree(&buffer->data);
811 buffer->use_data = NULL;
816 void auxtrace_buffer__free(struct auxtrace_buffer *buffer)
818 auxtrace_buffer__drop_data(buffer);
822 void auxtrace_synth_error(struct auxtrace_error_event *auxtrace_error, int type,
823 int code, int cpu, pid_t pid, pid_t tid, u64 ip,
828 memset(auxtrace_error, 0, sizeof(struct auxtrace_error_event));
830 auxtrace_error->header.type = PERF_RECORD_AUXTRACE_ERROR;
831 auxtrace_error->type = type;
832 auxtrace_error->code = code;
833 auxtrace_error->cpu = cpu;
834 auxtrace_error->pid = pid;
835 auxtrace_error->tid = tid;
836 auxtrace_error->ip = ip;
837 strlcpy(auxtrace_error->msg, msg, MAX_AUXTRACE_ERROR_MSG);
839 size = (void *)auxtrace_error->msg - (void *)auxtrace_error +
840 strlen(auxtrace_error->msg) + 1;
841 auxtrace_error->header.size = PERF_ALIGN(size, sizeof(u64));
844 int perf_event__synthesize_auxtrace_info(struct auxtrace_record *itr,
845 struct perf_tool *tool,
846 struct perf_session *session,
847 perf_event__handler_t process)
849 union perf_event *ev;
853 pr_debug2("Synthesizing auxtrace information\n");
854 priv_size = auxtrace_record__info_priv_size(itr);
855 ev = zalloc(sizeof(struct auxtrace_info_event) + priv_size);
859 ev->auxtrace_info.header.type = PERF_RECORD_AUXTRACE_INFO;
860 ev->auxtrace_info.header.size = sizeof(struct auxtrace_info_event) +
862 err = auxtrace_record__info_fill(itr, session, &ev->auxtrace_info,
867 err = process(tool, ev, NULL, NULL);
873 static bool auxtrace__dont_decode(struct perf_session *session)
875 return !session->itrace_synth_opts ||
876 session->itrace_synth_opts->dont_decode;
879 int perf_event__process_auxtrace_info(struct perf_tool *tool __maybe_unused,
880 union perf_event *event,
881 struct perf_session *session)
883 enum auxtrace_type type = event->auxtrace_info.type;
886 fprintf(stdout, " type: %u\n", type);
889 case PERF_AUXTRACE_INTEL_PT:
890 return intel_pt_process_auxtrace_info(event, session);
891 case PERF_AUXTRACE_INTEL_BTS:
892 return intel_bts_process_auxtrace_info(event, session);
893 case PERF_AUXTRACE_UNKNOWN:
899 s64 perf_event__process_auxtrace(struct perf_tool *tool,
900 union perf_event *event,
901 struct perf_session *session)
906 fprintf(stdout, " size: %#"PRIx64" offset: %#"PRIx64" ref: %#"PRIx64" idx: %u tid: %d cpu: %d\n",
907 event->auxtrace.size, event->auxtrace.offset,
908 event->auxtrace.reference, event->auxtrace.idx,
909 event->auxtrace.tid, event->auxtrace.cpu);
911 if (auxtrace__dont_decode(session))
912 return event->auxtrace.size;
914 if (!session->auxtrace || event->header.type != PERF_RECORD_AUXTRACE)
917 err = session->auxtrace->process_auxtrace_event(session, event, tool);
921 return event->auxtrace.size;
924 #define PERF_ITRACE_DEFAULT_PERIOD_TYPE PERF_ITRACE_PERIOD_NANOSECS
925 #define PERF_ITRACE_DEFAULT_PERIOD 100000
926 #define PERF_ITRACE_DEFAULT_CALLCHAIN_SZ 16
927 #define PERF_ITRACE_MAX_CALLCHAIN_SZ 1024
928 #define PERF_ITRACE_DEFAULT_LAST_BRANCH_SZ 64
929 #define PERF_ITRACE_MAX_LAST_BRANCH_SZ 1024
931 void itrace_synth_opts__set_default(struct itrace_synth_opts *synth_opts)
933 synth_opts->instructions = true;
934 synth_opts->branches = true;
935 synth_opts->transactions = true;
936 synth_opts->errors = true;
937 synth_opts->period_type = PERF_ITRACE_DEFAULT_PERIOD_TYPE;
938 synth_opts->period = PERF_ITRACE_DEFAULT_PERIOD;
939 synth_opts->callchain_sz = PERF_ITRACE_DEFAULT_CALLCHAIN_SZ;
940 synth_opts->last_branch_sz = PERF_ITRACE_DEFAULT_LAST_BRANCH_SZ;
944 * Please check tools/perf/Documentation/perf-script.txt for information
945 * about the options parsed here, which is introduced after this cset,
946 * when support in 'perf script' for these options is introduced.
948 int itrace_parse_synth_opts(const struct option *opt, const char *str,
951 struct itrace_synth_opts *synth_opts = opt->value;
954 bool period_type_set = false;
955 bool period_set = false;
957 synth_opts->set = true;
960 synth_opts->dont_decode = true;
965 itrace_synth_opts__set_default(synth_opts);
972 synth_opts->instructions = true;
973 while (*p == ' ' || *p == ',')
976 synth_opts->period = strtoull(p, &endptr, 10);
979 while (*p == ' ' || *p == ',')
983 synth_opts->period_type =
984 PERF_ITRACE_PERIOD_INSTRUCTIONS;
985 period_type_set = true;
988 synth_opts->period_type =
989 PERF_ITRACE_PERIOD_TICKS;
990 period_type_set = true;
993 synth_opts->period *= 1000;
996 synth_opts->period *= 1000;
1001 synth_opts->period_type =
1002 PERF_ITRACE_PERIOD_NANOSECS;
1003 period_type_set = true;
1013 synth_opts->branches = true;
1016 synth_opts->transactions = true;
1019 synth_opts->errors = true;
1022 synth_opts->log = true;
1025 synth_opts->branches = true;
1026 synth_opts->calls = true;
1029 synth_opts->branches = true;
1030 synth_opts->returns = true;
1033 synth_opts->callchain = true;
1034 synth_opts->callchain_sz =
1035 PERF_ITRACE_DEFAULT_CALLCHAIN_SZ;
1036 while (*p == ' ' || *p == ',')
1041 val = strtoul(p, &endptr, 10);
1043 if (!val || val > PERF_ITRACE_MAX_CALLCHAIN_SZ)
1045 synth_opts->callchain_sz = val;
1049 synth_opts->last_branch = true;
1050 synth_opts->last_branch_sz =
1051 PERF_ITRACE_DEFAULT_LAST_BRANCH_SZ;
1052 while (*p == ' ' || *p == ',')
1057 val = strtoul(p, &endptr, 10);
1060 val > PERF_ITRACE_MAX_LAST_BRANCH_SZ)
1062 synth_opts->last_branch_sz = val;
1073 if (synth_opts->instructions) {
1074 if (!period_type_set)
1075 synth_opts->period_type =
1076 PERF_ITRACE_DEFAULT_PERIOD_TYPE;
1078 synth_opts->period = PERF_ITRACE_DEFAULT_PERIOD;
1084 pr_err("Bad Instruction Tracing options '%s'\n", str);
1088 static const char * const auxtrace_error_type_name[] = {
1089 [PERF_AUXTRACE_ERROR_ITRACE] = "instruction trace",
1092 static const char *auxtrace_error_name(int type)
1094 const char *error_type_name = NULL;
1096 if (type < PERF_AUXTRACE_ERROR_MAX)
1097 error_type_name = auxtrace_error_type_name[type];
1098 if (!error_type_name)
1099 error_type_name = "unknown AUX";
1100 return error_type_name;
1103 size_t perf_event__fprintf_auxtrace_error(union perf_event *event, FILE *fp)
1105 struct auxtrace_error_event *e = &event->auxtrace_error;
1108 ret = fprintf(fp, " %s error type %u",
1109 auxtrace_error_name(e->type), e->type);
1110 ret += fprintf(fp, " cpu %d pid %d tid %d ip %#"PRIx64" code %u: %s\n",
1111 e->cpu, e->pid, e->tid, e->ip, e->code, e->msg);
1115 void perf_session__auxtrace_error_inc(struct perf_session *session,
1116 union perf_event *event)
1118 struct auxtrace_error_event *e = &event->auxtrace_error;
1120 if (e->type < PERF_AUXTRACE_ERROR_MAX)
1121 session->evlist->stats.nr_auxtrace_errors[e->type] += 1;
1124 void events_stats__auxtrace_error_warn(const struct events_stats *stats)
1128 for (i = 0; i < PERF_AUXTRACE_ERROR_MAX; i++) {
1129 if (!stats->nr_auxtrace_errors[i])
1131 ui__warning("%u %s errors\n",
1132 stats->nr_auxtrace_errors[i],
1133 auxtrace_error_name(i));
1137 int perf_event__process_auxtrace_error(struct perf_tool *tool __maybe_unused,
1138 union perf_event *event,
1139 struct perf_session *session)
1141 if (auxtrace__dont_decode(session))
1144 perf_event__fprintf_auxtrace_error(event, stdout);
1148 static int __auxtrace_mmap__read(struct auxtrace_mmap *mm,
1149 struct auxtrace_record *itr,
1150 struct perf_tool *tool, process_auxtrace_t fn,
1151 bool snapshot, size_t snapshot_size)
1153 u64 head, old = mm->prev, offset, ref;
1154 unsigned char *data = mm->base;
1155 size_t size, head_off, old_off, len1, len2, padding;
1156 union perf_event ev;
1157 void *data1, *data2;
1160 head = auxtrace_mmap__read_snapshot_head(mm);
1161 if (auxtrace_record__find_snapshot(itr, mm->idx, mm, data,
1165 head = auxtrace_mmap__read_head(mm);
1171 pr_debug3("auxtrace idx %d old %#"PRIx64" head %#"PRIx64" diff %#"PRIx64"\n",
1172 mm->idx, old, head, head - old);
1175 head_off = head & mm->mask;
1176 old_off = old & mm->mask;
1178 head_off = head % mm->len;
1179 old_off = old % mm->len;
1182 if (head_off > old_off)
1183 size = head_off - old_off;
1185 size = mm->len - (old_off - head_off);
1187 if (snapshot && size > snapshot_size)
1188 size = snapshot_size;
1190 ref = auxtrace_record__reference(itr);
1192 if (head > old || size <= head || mm->mask) {
1193 offset = head - size;
1196 * When the buffer size is not a power of 2, 'head' wraps at the
1197 * highest multiple of the buffer size, so we have to subtract
1198 * the remainder here.
1200 u64 rem = (0ULL - mm->len) % mm->len;
1202 offset = head - size - rem;
1205 if (size > head_off) {
1206 len1 = size - head_off;
1207 data1 = &data[mm->len - len1];
1212 data1 = &data[head_off - len1];
1217 if (itr->alignment) {
1218 unsigned int unwanted = len1 % itr->alignment;
1224 /* padding must be written by fn() e.g. record__process_auxtrace() */
1225 padding = size & (PERF_AUXTRACE_RECORD_ALIGNMENT - 1);
1227 padding = PERF_AUXTRACE_RECORD_ALIGNMENT - padding;
1229 memset(&ev, 0, sizeof(ev));
1230 ev.auxtrace.header.type = PERF_RECORD_AUXTRACE;
1231 ev.auxtrace.header.size = sizeof(ev.auxtrace);
1232 ev.auxtrace.size = size + padding;
1233 ev.auxtrace.offset = offset;
1234 ev.auxtrace.reference = ref;
1235 ev.auxtrace.idx = mm->idx;
1236 ev.auxtrace.tid = mm->tid;
1237 ev.auxtrace.cpu = mm->cpu;
1239 if (fn(tool, &ev, data1, len1, data2, len2))
1245 auxtrace_mmap__write_tail(mm, head);
1246 if (itr->read_finish) {
1249 err = itr->read_finish(itr, mm->idx);
1258 int auxtrace_mmap__read(struct auxtrace_mmap *mm, struct auxtrace_record *itr,
1259 struct perf_tool *tool, process_auxtrace_t fn)
1261 return __auxtrace_mmap__read(mm, itr, tool, fn, false, 0);
1264 int auxtrace_mmap__read_snapshot(struct auxtrace_mmap *mm,
1265 struct auxtrace_record *itr,
1266 struct perf_tool *tool, process_auxtrace_t fn,
1267 size_t snapshot_size)
1269 return __auxtrace_mmap__read(mm, itr, tool, fn, true, snapshot_size);
1273 * struct auxtrace_cache - hash table to implement a cache
1274 * @hashtable: the hashtable
1275 * @sz: hashtable size (number of hlists)
1276 * @entry_size: size of an entry
1277 * @limit: limit the number of entries to this maximum, when reached the cache
1278 * is dropped and caching begins again with an empty cache
1279 * @cnt: current number of entries
1280 * @bits: hashtable size (@sz = 2^@bits)
1282 struct auxtrace_cache {
1283 struct hlist_head *hashtable;
1291 struct auxtrace_cache *auxtrace_cache__new(unsigned int bits, size_t entry_size,
1292 unsigned int limit_percent)
1294 struct auxtrace_cache *c;
1295 struct hlist_head *ht;
1298 c = zalloc(sizeof(struct auxtrace_cache));
1304 ht = calloc(sz, sizeof(struct hlist_head));
1308 for (i = 0; i < sz; i++)
1309 INIT_HLIST_HEAD(&ht[i]);
1313 c->entry_size = entry_size;
1314 c->limit = (c->sz * limit_percent) / 100;
1324 static void auxtrace_cache__drop(struct auxtrace_cache *c)
1326 struct auxtrace_cache_entry *entry;
1327 struct hlist_node *tmp;
1333 for (i = 0; i < c->sz; i++) {
1334 hlist_for_each_entry_safe(entry, tmp, &c->hashtable[i], hash) {
1335 hlist_del(&entry->hash);
1336 auxtrace_cache__free_entry(c, entry);
1343 void auxtrace_cache__free(struct auxtrace_cache *c)
1348 auxtrace_cache__drop(c);
1353 void *auxtrace_cache__alloc_entry(struct auxtrace_cache *c)
1355 return malloc(c->entry_size);
1358 void auxtrace_cache__free_entry(struct auxtrace_cache *c __maybe_unused,
1364 int auxtrace_cache__add(struct auxtrace_cache *c, u32 key,
1365 struct auxtrace_cache_entry *entry)
1367 if (c->limit && ++c->cnt > c->limit)
1368 auxtrace_cache__drop(c);
1371 hlist_add_head(&entry->hash, &c->hashtable[hash_32(key, c->bits)]);
1376 void *auxtrace_cache__lookup(struct auxtrace_cache *c, u32 key)
1378 struct auxtrace_cache_entry *entry;
1379 struct hlist_head *hlist;
1384 hlist = &c->hashtable[hash_32(key, c->bits)];
1385 hlist_for_each_entry(entry, hlist, hash) {
1386 if (entry->key == key)