2 * intel_pt.c: Intel Processor 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
19 #include <linux/kernel.h>
20 #include <linux/types.h>
34 #include "thread-stack.h"
36 #include "callchain.h"
43 #include "intel-pt-decoder/intel-pt-log.h"
44 #include "intel-pt-decoder/intel-pt-decoder.h"
45 #include "intel-pt-decoder/intel-pt-insn-decoder.h"
46 #include "intel-pt-decoder/intel-pt-pkt-decoder.h"
48 #define MAX_TIMESTAMP (~0ULL)
51 struct auxtrace auxtrace;
52 struct auxtrace_queues queues;
53 struct auxtrace_heap heap;
55 struct perf_session *session;
56 struct machine *machine;
57 struct perf_evsel *switch_evsel;
58 struct thread *unknown_thread;
59 bool timeless_decoding;
68 int have_sched_switch;
74 struct perf_tsc_conversion tc;
75 bool cap_user_time_zero;
77 struct itrace_synth_opts synth_opts;
79 bool sample_instructions;
80 u64 instructions_sample_type;
81 u64 instructions_sample_period;
86 u64 branches_sample_type;
89 bool sample_transactions;
90 u64 transactions_sample_type;
93 bool synth_needs_swap;
102 unsigned max_non_turbo_ratio;
104 unsigned long num_events;
108 INTEL_PT_SS_NOT_TRACING,
111 INTEL_PT_SS_EXPECTING_SWITCH_EVENT,
112 INTEL_PT_SS_EXPECTING_SWITCH_IP,
115 struct intel_pt_queue {
117 unsigned int queue_nr;
118 struct auxtrace_buffer *buffer;
120 const struct intel_pt_state *state;
121 struct ip_callchain *chain;
122 struct branch_stack *last_branch;
123 struct branch_stack *last_branch_rb;
124 size_t last_branch_pos;
125 union perf_event *event_buf;
128 bool step_through_buffers;
129 bool use_buffer_pid_tid;
134 struct thread *thread;
144 static void intel_pt_dump(struct intel_pt *pt __maybe_unused,
145 unsigned char *buf, size_t len)
147 struct intel_pt_pkt packet;
150 char desc[INTEL_PT_PKT_DESC_MAX];
151 const char *color = PERF_COLOR_BLUE;
153 color_fprintf(stdout, color,
154 ". ... Intel Processor Trace data: size %zu bytes\n",
158 ret = intel_pt_get_packet(buf, len, &packet);
164 color_fprintf(stdout, color, " %08x: ", pos);
165 for (i = 0; i < pkt_len; i++)
166 color_fprintf(stdout, color, " %02x", buf[i]);
168 color_fprintf(stdout, color, " ");
170 ret = intel_pt_pkt_desc(&packet, desc,
171 INTEL_PT_PKT_DESC_MAX);
173 color_fprintf(stdout, color, " %s\n", desc);
175 color_fprintf(stdout, color, " Bad packet!\n");
183 static void intel_pt_dump_event(struct intel_pt *pt, unsigned char *buf,
187 intel_pt_dump(pt, buf, len);
190 static int intel_pt_do_fix_overlap(struct intel_pt *pt, struct auxtrace_buffer *a,
191 struct auxtrace_buffer *b)
195 start = intel_pt_find_overlap(a->data, a->size, b->data, b->size,
199 b->use_size = b->data + b->size - start;
204 static void intel_pt_use_buffer_pid_tid(struct intel_pt_queue *ptq,
205 struct auxtrace_queue *queue,
206 struct auxtrace_buffer *buffer)
208 if (queue->cpu == -1 && buffer->cpu != -1)
209 ptq->cpu = buffer->cpu;
211 ptq->pid = buffer->pid;
212 ptq->tid = buffer->tid;
214 intel_pt_log("queue %u cpu %d pid %d tid %d\n",
215 ptq->queue_nr, ptq->cpu, ptq->pid, ptq->tid);
217 thread__zput(ptq->thread);
219 if (ptq->tid != -1) {
221 ptq->thread = machine__findnew_thread(ptq->pt->machine,
225 ptq->thread = machine__find_thread(ptq->pt->machine, -1,
230 /* This function assumes data is processed sequentially only */
231 static int intel_pt_get_trace(struct intel_pt_buffer *b, void *data)
233 struct intel_pt_queue *ptq = data;
234 struct auxtrace_buffer *buffer = ptq->buffer, *old_buffer = buffer;
235 struct auxtrace_queue *queue;
242 queue = &ptq->pt->queues.queue_array[ptq->queue_nr];
244 buffer = auxtrace_buffer__next(queue, buffer);
247 auxtrace_buffer__drop_data(old_buffer);
252 ptq->buffer = buffer;
255 int fd = perf_data_file__fd(ptq->pt->session->file);
257 buffer->data = auxtrace_buffer__get_data(buffer, fd);
262 if (ptq->pt->snapshot_mode && !buffer->consecutive && old_buffer &&
263 intel_pt_do_fix_overlap(ptq->pt, old_buffer, buffer))
267 auxtrace_buffer__drop_data(old_buffer);
269 if (buffer->use_data) {
270 b->len = buffer->use_size;
271 b->buf = buffer->use_data;
273 b->len = buffer->size;
274 b->buf = buffer->data;
276 b->ref_timestamp = buffer->reference;
278 if (!old_buffer || ptq->pt->sampling_mode || (ptq->pt->snapshot_mode &&
279 !buffer->consecutive)) {
280 b->consecutive = false;
281 b->trace_nr = buffer->buffer_nr + 1;
283 b->consecutive = true;
286 if (ptq->use_buffer_pid_tid && (ptq->pid != buffer->pid ||
287 ptq->tid != buffer->tid))
288 intel_pt_use_buffer_pid_tid(ptq, queue, buffer);
290 if (ptq->step_through_buffers)
294 return intel_pt_get_trace(b, data);
299 struct intel_pt_cache_entry {
300 struct auxtrace_cache_entry entry;
303 enum intel_pt_insn_op op;
304 enum intel_pt_insn_branch branch;
309 static int intel_pt_config_div(const char *var, const char *value, void *data)
314 if (!strcmp(var, "intel-pt.cache-divisor")) {
315 val = strtol(value, NULL, 0);
316 if (val > 0 && val <= INT_MAX)
323 static int intel_pt_cache_divisor(void)
330 perf_config(intel_pt_config_div, &d);
338 static unsigned int intel_pt_cache_size(struct dso *dso,
339 struct machine *machine)
343 size = dso__data_size(dso, machine);
344 size /= intel_pt_cache_divisor();
347 if (size > (1 << 21))
349 return 32 - __builtin_clz(size);
352 static struct auxtrace_cache *intel_pt_cache(struct dso *dso,
353 struct machine *machine)
355 struct auxtrace_cache *c;
358 if (dso->auxtrace_cache)
359 return dso->auxtrace_cache;
361 bits = intel_pt_cache_size(dso, machine);
363 /* Ignoring cache creation failure */
364 c = auxtrace_cache__new(bits, sizeof(struct intel_pt_cache_entry), 200);
366 dso->auxtrace_cache = c;
371 static int intel_pt_cache_add(struct dso *dso, struct machine *machine,
372 u64 offset, u64 insn_cnt, u64 byte_cnt,
373 struct intel_pt_insn *intel_pt_insn)
375 struct auxtrace_cache *c = intel_pt_cache(dso, machine);
376 struct intel_pt_cache_entry *e;
382 e = auxtrace_cache__alloc_entry(c);
386 e->insn_cnt = insn_cnt;
387 e->byte_cnt = byte_cnt;
388 e->op = intel_pt_insn->op;
389 e->branch = intel_pt_insn->branch;
390 e->length = intel_pt_insn->length;
391 e->rel = intel_pt_insn->rel;
393 err = auxtrace_cache__add(c, offset, &e->entry);
395 auxtrace_cache__free_entry(c, e);
400 static struct intel_pt_cache_entry *
401 intel_pt_cache_lookup(struct dso *dso, struct machine *machine, u64 offset)
403 struct auxtrace_cache *c = intel_pt_cache(dso, machine);
408 return auxtrace_cache__lookup(dso->auxtrace_cache, offset);
411 static int intel_pt_walk_next_insn(struct intel_pt_insn *intel_pt_insn,
412 uint64_t *insn_cnt_ptr, uint64_t *ip,
413 uint64_t to_ip, uint64_t max_insn_cnt,
416 struct intel_pt_queue *ptq = data;
417 struct machine *machine = ptq->pt->machine;
418 struct thread *thread;
419 struct addr_location al;
420 unsigned char buf[1024];
425 u64 offset, start_offset, start_ip;
429 if (to_ip && *ip == to_ip)
432 bufsz = intel_pt_insn_max_size();
434 if (*ip >= ptq->pt->kernel_start)
435 cpumode = PERF_RECORD_MISC_KERNEL;
437 cpumode = PERF_RECORD_MISC_USER;
439 thread = ptq->thread;
441 if (cpumode != PERF_RECORD_MISC_KERNEL)
443 thread = ptq->pt->unknown_thread;
447 thread__find_addr_map(thread, cpumode, MAP__FUNCTION, *ip, &al);
448 if (!al.map || !al.map->dso)
451 if (al.map->dso->data.status == DSO_DATA_STATUS_ERROR &&
452 dso__data_status_seen(al.map->dso,
453 DSO_DATA_STATUS_SEEN_ITRACE))
456 offset = al.map->map_ip(al.map, *ip);
458 if (!to_ip && one_map) {
459 struct intel_pt_cache_entry *e;
461 e = intel_pt_cache_lookup(al.map->dso, machine, offset);
463 (!max_insn_cnt || e->insn_cnt <= max_insn_cnt)) {
464 *insn_cnt_ptr = e->insn_cnt;
466 intel_pt_insn->op = e->op;
467 intel_pt_insn->branch = e->branch;
468 intel_pt_insn->length = e->length;
469 intel_pt_insn->rel = e->rel;
470 intel_pt_log_insn_no_data(intel_pt_insn, *ip);
475 start_offset = offset;
478 /* Load maps to ensure dso->is_64_bit has been updated */
479 map__load(al.map, machine->symbol_filter);
481 x86_64 = al.map->dso->is_64_bit;
484 len = dso__data_read_offset(al.map->dso, machine,
489 if (intel_pt_get_insn(buf, len, x86_64, intel_pt_insn))
492 intel_pt_log_insn(intel_pt_insn, *ip);
496 if (intel_pt_insn->branch != INTEL_PT_BR_NO_BRANCH)
499 if (max_insn_cnt && insn_cnt >= max_insn_cnt)
502 *ip += intel_pt_insn->length;
504 if (to_ip && *ip == to_ip)
507 if (*ip >= al.map->end)
510 offset += intel_pt_insn->length;
515 *insn_cnt_ptr = insn_cnt;
521 * Didn't lookup in the 'to_ip' case, so do it now to prevent duplicate
525 struct intel_pt_cache_entry *e;
527 e = intel_pt_cache_lookup(al.map->dso, machine, start_offset);
532 /* Ignore cache errors */
533 intel_pt_cache_add(al.map->dso, machine, start_offset, insn_cnt,
534 *ip - start_ip, intel_pt_insn);
539 *insn_cnt_ptr = insn_cnt;
543 static bool intel_pt_get_config(struct intel_pt *pt,
544 struct perf_event_attr *attr, u64 *config)
546 if (attr->type == pt->pmu_type) {
548 *config = attr->config;
555 static bool intel_pt_exclude_kernel(struct intel_pt *pt)
557 struct perf_evsel *evsel;
559 evlist__for_each(pt->session->evlist, evsel) {
560 if (intel_pt_get_config(pt, &evsel->attr, NULL) &&
561 !evsel->attr.exclude_kernel)
567 static bool intel_pt_return_compression(struct intel_pt *pt)
569 struct perf_evsel *evsel;
572 if (!pt->noretcomp_bit)
575 evlist__for_each(pt->session->evlist, evsel) {
576 if (intel_pt_get_config(pt, &evsel->attr, &config) &&
577 (config & pt->noretcomp_bit))
583 static unsigned int intel_pt_mtc_period(struct intel_pt *pt)
585 struct perf_evsel *evsel;
589 if (!pt->mtc_freq_bits)
592 for (shift = 0, config = pt->mtc_freq_bits; !(config & 1); shift++)
595 evlist__for_each(pt->session->evlist, evsel) {
596 if (intel_pt_get_config(pt, &evsel->attr, &config))
597 return (config & pt->mtc_freq_bits) >> shift;
602 static bool intel_pt_timeless_decoding(struct intel_pt *pt)
604 struct perf_evsel *evsel;
605 bool timeless_decoding = true;
608 if (!pt->tsc_bit || !pt->cap_user_time_zero)
611 evlist__for_each(pt->session->evlist, evsel) {
612 if (!(evsel->attr.sample_type & PERF_SAMPLE_TIME))
614 if (intel_pt_get_config(pt, &evsel->attr, &config)) {
615 if (config & pt->tsc_bit)
616 timeless_decoding = false;
621 return timeless_decoding;
624 static bool intel_pt_tracing_kernel(struct intel_pt *pt)
626 struct perf_evsel *evsel;
628 evlist__for_each(pt->session->evlist, evsel) {
629 if (intel_pt_get_config(pt, &evsel->attr, NULL) &&
630 !evsel->attr.exclude_kernel)
636 static bool intel_pt_have_tsc(struct intel_pt *pt)
638 struct perf_evsel *evsel;
639 bool have_tsc = false;
645 evlist__for_each(pt->session->evlist, evsel) {
646 if (intel_pt_get_config(pt, &evsel->attr, &config)) {
647 if (config & pt->tsc_bit)
656 static u64 intel_pt_ns_to_ticks(const struct intel_pt *pt, u64 ns)
660 quot = ns / pt->tc.time_mult;
661 rem = ns % pt->tc.time_mult;
662 return (quot << pt->tc.time_shift) + (rem << pt->tc.time_shift) /
666 static struct intel_pt_queue *intel_pt_alloc_queue(struct intel_pt *pt,
667 unsigned int queue_nr)
669 struct intel_pt_params params = { .get_trace = 0, };
670 struct intel_pt_queue *ptq;
672 ptq = zalloc(sizeof(struct intel_pt_queue));
676 if (pt->synth_opts.callchain) {
677 size_t sz = sizeof(struct ip_callchain);
679 sz += pt->synth_opts.callchain_sz * sizeof(u64);
680 ptq->chain = zalloc(sz);
685 if (pt->synth_opts.last_branch) {
686 size_t sz = sizeof(struct branch_stack);
688 sz += pt->synth_opts.last_branch_sz *
689 sizeof(struct branch_entry);
690 ptq->last_branch = zalloc(sz);
691 if (!ptq->last_branch)
693 ptq->last_branch_rb = zalloc(sz);
694 if (!ptq->last_branch_rb)
698 ptq->event_buf = malloc(PERF_SAMPLE_MAX_SIZE);
703 ptq->queue_nr = queue_nr;
704 ptq->exclude_kernel = intel_pt_exclude_kernel(pt);
710 params.get_trace = intel_pt_get_trace;
711 params.walk_insn = intel_pt_walk_next_insn;
713 params.return_compression = intel_pt_return_compression(pt);
714 params.max_non_turbo_ratio = pt->max_non_turbo_ratio;
715 params.mtc_period = intel_pt_mtc_period(pt);
716 params.tsc_ctc_ratio_n = pt->tsc_ctc_ratio_n;
717 params.tsc_ctc_ratio_d = pt->tsc_ctc_ratio_d;
719 if (pt->synth_opts.instructions) {
720 if (pt->synth_opts.period) {
721 switch (pt->synth_opts.period_type) {
722 case PERF_ITRACE_PERIOD_INSTRUCTIONS:
724 INTEL_PT_PERIOD_INSTRUCTIONS;
725 params.period = pt->synth_opts.period;
727 case PERF_ITRACE_PERIOD_TICKS:
728 params.period_type = INTEL_PT_PERIOD_TICKS;
729 params.period = pt->synth_opts.period;
731 case PERF_ITRACE_PERIOD_NANOSECS:
732 params.period_type = INTEL_PT_PERIOD_TICKS;
733 params.period = intel_pt_ns_to_ticks(pt,
734 pt->synth_opts.period);
741 if (!params.period) {
742 params.period_type = INTEL_PT_PERIOD_INSTRUCTIONS;
747 ptq->decoder = intel_pt_decoder_new(¶ms);
754 zfree(&ptq->event_buf);
755 zfree(&ptq->last_branch);
756 zfree(&ptq->last_branch_rb);
762 static void intel_pt_free_queue(void *priv)
764 struct intel_pt_queue *ptq = priv;
768 thread__zput(ptq->thread);
769 intel_pt_decoder_free(ptq->decoder);
770 zfree(&ptq->event_buf);
771 zfree(&ptq->last_branch);
772 zfree(&ptq->last_branch_rb);
777 static void intel_pt_set_pid_tid_cpu(struct intel_pt *pt,
778 struct auxtrace_queue *queue)
780 struct intel_pt_queue *ptq = queue->priv;
782 if (queue->tid == -1 || pt->have_sched_switch) {
783 ptq->tid = machine__get_current_tid(pt->machine, ptq->cpu);
784 thread__zput(ptq->thread);
787 if (!ptq->thread && ptq->tid != -1)
788 ptq->thread = machine__find_thread(pt->machine, -1, ptq->tid);
791 ptq->pid = ptq->thread->pid_;
792 if (queue->cpu == -1)
793 ptq->cpu = ptq->thread->cpu;
797 static void intel_pt_sample_flags(struct intel_pt_queue *ptq)
799 if (ptq->state->flags & INTEL_PT_ABORT_TX) {
800 ptq->flags = PERF_IP_FLAG_BRANCH | PERF_IP_FLAG_TX_ABORT;
801 } else if (ptq->state->flags & INTEL_PT_ASYNC) {
802 if (ptq->state->to_ip)
803 ptq->flags = PERF_IP_FLAG_BRANCH | PERF_IP_FLAG_CALL |
805 PERF_IP_FLAG_INTERRUPT;
807 ptq->flags = PERF_IP_FLAG_BRANCH |
808 PERF_IP_FLAG_TRACE_END;
811 if (ptq->state->from_ip)
812 ptq->flags = intel_pt_insn_type(ptq->state->insn_op);
814 ptq->flags = PERF_IP_FLAG_BRANCH |
815 PERF_IP_FLAG_TRACE_BEGIN;
816 if (ptq->state->flags & INTEL_PT_IN_TX)
817 ptq->flags |= PERF_IP_FLAG_IN_TX;
818 ptq->insn_len = ptq->state->insn_len;
822 static int intel_pt_setup_queue(struct intel_pt *pt,
823 struct auxtrace_queue *queue,
824 unsigned int queue_nr)
826 struct intel_pt_queue *ptq = queue->priv;
828 if (list_empty(&queue->head))
832 ptq = intel_pt_alloc_queue(pt, queue_nr);
837 if (queue->cpu != -1)
838 ptq->cpu = queue->cpu;
839 ptq->tid = queue->tid;
841 if (pt->sampling_mode) {
842 if (pt->timeless_decoding)
843 ptq->step_through_buffers = true;
844 if (pt->timeless_decoding || !pt->have_sched_switch)
845 ptq->use_buffer_pid_tid = true;
851 ptq->switch_state != INTEL_PT_SS_EXPECTING_SWITCH_EVENT)) {
852 const struct intel_pt_state *state;
855 if (pt->timeless_decoding)
858 intel_pt_log("queue %u getting timestamp\n", queue_nr);
859 intel_pt_log("queue %u decoding cpu %d pid %d tid %d\n",
860 queue_nr, ptq->cpu, ptq->pid, ptq->tid);
862 state = intel_pt_decode(ptq->decoder);
864 if (state->err == INTEL_PT_ERR_NODATA) {
865 intel_pt_log("queue %u has no timestamp\n",
871 if (state->timestamp)
875 ptq->timestamp = state->timestamp;
876 intel_pt_log("queue %u timestamp 0x%" PRIx64 "\n",
877 queue_nr, ptq->timestamp);
879 ptq->have_sample = true;
880 intel_pt_sample_flags(ptq);
881 ret = auxtrace_heap__add(&pt->heap, queue_nr, ptq->timestamp);
890 static int intel_pt_setup_queues(struct intel_pt *pt)
895 for (i = 0; i < pt->queues.nr_queues; i++) {
896 ret = intel_pt_setup_queue(pt, &pt->queues.queue_array[i], i);
903 static inline void intel_pt_copy_last_branch_rb(struct intel_pt_queue *ptq)
905 struct branch_stack *bs_src = ptq->last_branch_rb;
906 struct branch_stack *bs_dst = ptq->last_branch;
909 bs_dst->nr = bs_src->nr;
914 nr = ptq->pt->synth_opts.last_branch_sz - ptq->last_branch_pos;
915 memcpy(&bs_dst->entries[0],
916 &bs_src->entries[ptq->last_branch_pos],
917 sizeof(struct branch_entry) * nr);
919 if (bs_src->nr >= ptq->pt->synth_opts.last_branch_sz) {
920 memcpy(&bs_dst->entries[nr],
922 sizeof(struct branch_entry) * ptq->last_branch_pos);
926 static inline void intel_pt_reset_last_branch_rb(struct intel_pt_queue *ptq)
928 ptq->last_branch_pos = 0;
929 ptq->last_branch_rb->nr = 0;
932 static void intel_pt_update_last_branch_rb(struct intel_pt_queue *ptq)
934 const struct intel_pt_state *state = ptq->state;
935 struct branch_stack *bs = ptq->last_branch_rb;
936 struct branch_entry *be;
938 if (!ptq->last_branch_pos)
939 ptq->last_branch_pos = ptq->pt->synth_opts.last_branch_sz;
941 ptq->last_branch_pos -= 1;
943 be = &bs->entries[ptq->last_branch_pos];
944 be->from = state->from_ip;
945 be->to = state->to_ip;
946 be->flags.abort = !!(state->flags & INTEL_PT_ABORT_TX);
947 be->flags.in_tx = !!(state->flags & INTEL_PT_IN_TX);
948 /* No support for mispredict */
949 be->flags.mispred = ptq->pt->mispred_all;
951 if (bs->nr < ptq->pt->synth_opts.last_branch_sz)
955 static int intel_pt_inject_event(union perf_event *event,
956 struct perf_sample *sample, u64 type,
959 event->header.size = perf_event__sample_event_size(sample, type, 0);
960 return perf_event__synthesize_sample(event, type, 0, sample, swapped);
963 static int intel_pt_synth_branch_sample(struct intel_pt_queue *ptq)
966 struct intel_pt *pt = ptq->pt;
967 union perf_event *event = ptq->event_buf;
968 struct perf_sample sample = { .ip = 0, };
969 struct dummy_branch_stack {
971 struct branch_entry entries;
974 if (pt->branches_filter && !(pt->branches_filter & ptq->flags))
977 if (pt->synth_opts.initial_skip &&
978 pt->num_events++ < pt->synth_opts.initial_skip)
981 event->sample.header.type = PERF_RECORD_SAMPLE;
982 event->sample.header.misc = PERF_RECORD_MISC_USER;
983 event->sample.header.size = sizeof(struct perf_event_header);
985 if (!pt->timeless_decoding)
986 sample.time = tsc_to_perf_time(ptq->timestamp, &pt->tc);
988 sample.cpumode = PERF_RECORD_MISC_USER;
989 sample.ip = ptq->state->from_ip;
990 sample.pid = ptq->pid;
991 sample.tid = ptq->tid;
992 sample.addr = ptq->state->to_ip;
993 sample.id = ptq->pt->branches_id;
994 sample.stream_id = ptq->pt->branches_id;
996 sample.cpu = ptq->cpu;
997 sample.flags = ptq->flags;
998 sample.insn_len = ptq->insn_len;
1001 * perf report cannot handle events without a branch stack when using
1002 * SORT_MODE__BRANCH so make a dummy one.
1004 if (pt->synth_opts.last_branch && sort__mode == SORT_MODE__BRANCH) {
1005 dummy_bs = (struct dummy_branch_stack){
1012 sample.branch_stack = (struct branch_stack *)&dummy_bs;
1015 if (pt->synth_opts.inject) {
1016 ret = intel_pt_inject_event(event, &sample,
1017 pt->branches_sample_type,
1018 pt->synth_needs_swap);
1023 ret = perf_session__deliver_synth_event(pt->session, event, &sample);
1025 pr_err("Intel Processor Trace: failed to deliver branch event, error %d\n",
1031 static int intel_pt_synth_instruction_sample(struct intel_pt_queue *ptq)
1034 struct intel_pt *pt = ptq->pt;
1035 union perf_event *event = ptq->event_buf;
1036 struct perf_sample sample = { .ip = 0, };
1038 if (pt->synth_opts.initial_skip &&
1039 pt->num_events++ < pt->synth_opts.initial_skip)
1042 event->sample.header.type = PERF_RECORD_SAMPLE;
1043 event->sample.header.misc = PERF_RECORD_MISC_USER;
1044 event->sample.header.size = sizeof(struct perf_event_header);
1046 if (!pt->timeless_decoding)
1047 sample.time = tsc_to_perf_time(ptq->timestamp, &pt->tc);
1049 sample.cpumode = PERF_RECORD_MISC_USER;
1050 sample.ip = ptq->state->from_ip;
1051 sample.pid = ptq->pid;
1052 sample.tid = ptq->tid;
1053 sample.addr = ptq->state->to_ip;
1054 sample.id = ptq->pt->instructions_id;
1055 sample.stream_id = ptq->pt->instructions_id;
1056 sample.period = ptq->state->tot_insn_cnt - ptq->last_insn_cnt;
1057 sample.cpu = ptq->cpu;
1058 sample.flags = ptq->flags;
1059 sample.insn_len = ptq->insn_len;
1061 ptq->last_insn_cnt = ptq->state->tot_insn_cnt;
1063 if (pt->synth_opts.callchain) {
1064 thread_stack__sample(ptq->thread, ptq->chain,
1065 pt->synth_opts.callchain_sz, sample.ip);
1066 sample.callchain = ptq->chain;
1069 if (pt->synth_opts.last_branch) {
1070 intel_pt_copy_last_branch_rb(ptq);
1071 sample.branch_stack = ptq->last_branch;
1074 if (pt->synth_opts.inject) {
1075 ret = intel_pt_inject_event(event, &sample,
1076 pt->instructions_sample_type,
1077 pt->synth_needs_swap);
1082 ret = perf_session__deliver_synth_event(pt->session, event, &sample);
1084 pr_err("Intel Processor Trace: failed to deliver instruction event, error %d\n",
1087 if (pt->synth_opts.last_branch)
1088 intel_pt_reset_last_branch_rb(ptq);
1093 static int intel_pt_synth_transaction_sample(struct intel_pt_queue *ptq)
1096 struct intel_pt *pt = ptq->pt;
1097 union perf_event *event = ptq->event_buf;
1098 struct perf_sample sample = { .ip = 0, };
1100 if (pt->synth_opts.initial_skip &&
1101 pt->num_events++ < pt->synth_opts.initial_skip)
1104 event->sample.header.type = PERF_RECORD_SAMPLE;
1105 event->sample.header.misc = PERF_RECORD_MISC_USER;
1106 event->sample.header.size = sizeof(struct perf_event_header);
1108 if (!pt->timeless_decoding)
1109 sample.time = tsc_to_perf_time(ptq->timestamp, &pt->tc);
1111 sample.cpumode = PERF_RECORD_MISC_USER;
1112 sample.ip = ptq->state->from_ip;
1113 sample.pid = ptq->pid;
1114 sample.tid = ptq->tid;
1115 sample.addr = ptq->state->to_ip;
1116 sample.id = ptq->pt->transactions_id;
1117 sample.stream_id = ptq->pt->transactions_id;
1119 sample.cpu = ptq->cpu;
1120 sample.flags = ptq->flags;
1121 sample.insn_len = ptq->insn_len;
1123 if (pt->synth_opts.callchain) {
1124 thread_stack__sample(ptq->thread, ptq->chain,
1125 pt->synth_opts.callchain_sz, sample.ip);
1126 sample.callchain = ptq->chain;
1129 if (pt->synth_opts.last_branch) {
1130 intel_pt_copy_last_branch_rb(ptq);
1131 sample.branch_stack = ptq->last_branch;
1134 if (pt->synth_opts.inject) {
1135 ret = intel_pt_inject_event(event, &sample,
1136 pt->transactions_sample_type,
1137 pt->synth_needs_swap);
1142 ret = perf_session__deliver_synth_event(pt->session, event, &sample);
1144 pr_err("Intel Processor Trace: failed to deliver transaction event, error %d\n",
1147 if (pt->synth_opts.last_branch)
1148 intel_pt_reset_last_branch_rb(ptq);
1153 static int intel_pt_synth_error(struct intel_pt *pt, int code, int cpu,
1154 pid_t pid, pid_t tid, u64 ip)
1156 union perf_event event;
1157 char msg[MAX_AUXTRACE_ERROR_MSG];
1160 intel_pt__strerror(code, msg, MAX_AUXTRACE_ERROR_MSG);
1162 auxtrace_synth_error(&event.auxtrace_error, PERF_AUXTRACE_ERROR_ITRACE,
1163 code, cpu, pid, tid, ip, msg);
1165 err = perf_session__deliver_synth_event(pt->session, &event, NULL);
1167 pr_err("Intel Processor Trace: failed to deliver error event, error %d\n",
1173 static int intel_pt_next_tid(struct intel_pt *pt, struct intel_pt_queue *ptq)
1175 struct auxtrace_queue *queue;
1176 pid_t tid = ptq->next_tid;
1182 intel_pt_log("switch: cpu %d tid %d\n", ptq->cpu, tid);
1184 err = machine__set_current_tid(pt->machine, ptq->cpu, -1, tid);
1186 queue = &pt->queues.queue_array[ptq->queue_nr];
1187 intel_pt_set_pid_tid_cpu(pt, queue);
1194 static inline bool intel_pt_is_switch_ip(struct intel_pt_queue *ptq, u64 ip)
1196 struct intel_pt *pt = ptq->pt;
1198 return ip == pt->switch_ip &&
1199 (ptq->flags & PERF_IP_FLAG_BRANCH) &&
1200 !(ptq->flags & (PERF_IP_FLAG_CONDITIONAL | PERF_IP_FLAG_ASYNC |
1201 PERF_IP_FLAG_INTERRUPT | PERF_IP_FLAG_TX_ABORT));
1204 static int intel_pt_sample(struct intel_pt_queue *ptq)
1206 const struct intel_pt_state *state = ptq->state;
1207 struct intel_pt *pt = ptq->pt;
1210 if (!ptq->have_sample)
1213 ptq->have_sample = false;
1215 if (pt->sample_instructions &&
1216 (state->type & INTEL_PT_INSTRUCTION) &&
1217 (!pt->synth_opts.initial_skip ||
1218 pt->num_events++ >= pt->synth_opts.initial_skip)) {
1219 err = intel_pt_synth_instruction_sample(ptq);
1224 if (pt->sample_transactions &&
1225 (state->type & INTEL_PT_TRANSACTION) &&
1226 (!pt->synth_opts.initial_skip ||
1227 pt->num_events++ >= pt->synth_opts.initial_skip)) {
1228 err = intel_pt_synth_transaction_sample(ptq);
1233 if (!(state->type & INTEL_PT_BRANCH))
1236 if (pt->synth_opts.callchain)
1237 thread_stack__event(ptq->thread, ptq->flags, state->from_ip,
1238 state->to_ip, ptq->insn_len,
1241 thread_stack__set_trace_nr(ptq->thread, state->trace_nr);
1243 if (pt->sample_branches) {
1244 err = intel_pt_synth_branch_sample(ptq);
1249 if (pt->synth_opts.last_branch)
1250 intel_pt_update_last_branch_rb(ptq);
1252 if (!pt->sync_switch)
1255 if (intel_pt_is_switch_ip(ptq, state->to_ip)) {
1256 switch (ptq->switch_state) {
1257 case INTEL_PT_SS_UNKNOWN:
1258 case INTEL_PT_SS_EXPECTING_SWITCH_IP:
1259 err = intel_pt_next_tid(pt, ptq);
1262 ptq->switch_state = INTEL_PT_SS_TRACING;
1265 ptq->switch_state = INTEL_PT_SS_EXPECTING_SWITCH_EVENT;
1268 } else if (!state->to_ip) {
1269 ptq->switch_state = INTEL_PT_SS_NOT_TRACING;
1270 } else if (ptq->switch_state == INTEL_PT_SS_NOT_TRACING) {
1271 ptq->switch_state = INTEL_PT_SS_UNKNOWN;
1272 } else if (ptq->switch_state == INTEL_PT_SS_UNKNOWN &&
1273 state->to_ip == pt->ptss_ip &&
1274 (ptq->flags & PERF_IP_FLAG_CALL)) {
1275 ptq->switch_state = INTEL_PT_SS_TRACING;
1281 static u64 intel_pt_switch_ip(struct intel_pt *pt, u64 *ptss_ip)
1283 struct machine *machine = pt->machine;
1285 struct symbol *sym, *start;
1286 u64 ip, switch_ip = 0;
1292 map = machine__kernel_map(machine);
1296 if (map__load(map, machine->symbol_filter))
1299 start = dso__first_symbol(map->dso, MAP__FUNCTION);
1301 for (sym = start; sym; sym = dso__next_symbol(sym)) {
1302 if (sym->binding == STB_GLOBAL &&
1303 !strcmp(sym->name, "__switch_to")) {
1304 ip = map->unmap_ip(map, sym->start);
1305 if (ip >= map->start && ip < map->end) {
1312 if (!switch_ip || !ptss_ip)
1315 if (pt->have_sched_switch == 1)
1316 ptss = "perf_trace_sched_switch";
1318 ptss = "__perf_event_task_sched_out";
1320 for (sym = start; sym; sym = dso__next_symbol(sym)) {
1321 if (!strcmp(sym->name, ptss)) {
1322 ip = map->unmap_ip(map, sym->start);
1323 if (ip >= map->start && ip < map->end) {
1333 static int intel_pt_run_decoder(struct intel_pt_queue *ptq, u64 *timestamp)
1335 const struct intel_pt_state *state = ptq->state;
1336 struct intel_pt *pt = ptq->pt;
1339 if (!pt->kernel_start) {
1340 pt->kernel_start = machine__kernel_start(pt->machine);
1341 if (pt->per_cpu_mmaps &&
1342 (pt->have_sched_switch == 1 || pt->have_sched_switch == 3) &&
1343 !pt->timeless_decoding && intel_pt_tracing_kernel(pt) &&
1344 !pt->sampling_mode) {
1345 pt->switch_ip = intel_pt_switch_ip(pt, &pt->ptss_ip);
1346 if (pt->switch_ip) {
1347 intel_pt_log("switch_ip: %"PRIx64" ptss_ip: %"PRIx64"\n",
1348 pt->switch_ip, pt->ptss_ip);
1349 pt->sync_switch = true;
1354 intel_pt_log("queue %u decoding cpu %d pid %d tid %d\n",
1355 ptq->queue_nr, ptq->cpu, ptq->pid, ptq->tid);
1357 err = intel_pt_sample(ptq);
1361 state = intel_pt_decode(ptq->decoder);
1363 if (state->err == INTEL_PT_ERR_NODATA)
1365 if (pt->sync_switch &&
1366 state->from_ip >= pt->kernel_start) {
1367 pt->sync_switch = false;
1368 intel_pt_next_tid(pt, ptq);
1370 if (pt->synth_opts.errors) {
1371 err = intel_pt_synth_error(pt, state->err,
1382 ptq->have_sample = true;
1383 intel_pt_sample_flags(ptq);
1385 /* Use estimated TSC upon return to user space */
1387 (state->from_ip >= pt->kernel_start || !state->from_ip) &&
1388 state->to_ip && state->to_ip < pt->kernel_start) {
1389 intel_pt_log("TSC %"PRIx64" est. TSC %"PRIx64"\n",
1390 state->timestamp, state->est_timestamp);
1391 ptq->timestamp = state->est_timestamp;
1392 /* Use estimated TSC in unknown switch state */
1393 } else if (pt->sync_switch &&
1394 ptq->switch_state == INTEL_PT_SS_UNKNOWN &&
1395 intel_pt_is_switch_ip(ptq, state->to_ip) &&
1396 ptq->next_tid == -1) {
1397 intel_pt_log("TSC %"PRIx64" est. TSC %"PRIx64"\n",
1398 state->timestamp, state->est_timestamp);
1399 ptq->timestamp = state->est_timestamp;
1400 } else if (state->timestamp > ptq->timestamp) {
1401 ptq->timestamp = state->timestamp;
1404 if (!pt->timeless_decoding && ptq->timestamp >= *timestamp) {
1405 *timestamp = ptq->timestamp;
1412 static inline int intel_pt_update_queues(struct intel_pt *pt)
1414 if (pt->queues.new_data) {
1415 pt->queues.new_data = false;
1416 return intel_pt_setup_queues(pt);
1421 static int intel_pt_process_queues(struct intel_pt *pt, u64 timestamp)
1423 unsigned int queue_nr;
1428 struct auxtrace_queue *queue;
1429 struct intel_pt_queue *ptq;
1431 if (!pt->heap.heap_cnt)
1434 if (pt->heap.heap_array[0].ordinal >= timestamp)
1437 queue_nr = pt->heap.heap_array[0].queue_nr;
1438 queue = &pt->queues.queue_array[queue_nr];
1441 intel_pt_log("queue %u processing 0x%" PRIx64 " to 0x%" PRIx64 "\n",
1442 queue_nr, pt->heap.heap_array[0].ordinal,
1445 auxtrace_heap__pop(&pt->heap);
1447 if (pt->heap.heap_cnt) {
1448 ts = pt->heap.heap_array[0].ordinal + 1;
1455 intel_pt_set_pid_tid_cpu(pt, queue);
1457 ret = intel_pt_run_decoder(ptq, &ts);
1460 auxtrace_heap__add(&pt->heap, queue_nr, ts);
1465 ret = auxtrace_heap__add(&pt->heap, queue_nr, ts);
1469 ptq->on_heap = false;
1476 static int intel_pt_process_timeless_queues(struct intel_pt *pt, pid_t tid,
1479 struct auxtrace_queues *queues = &pt->queues;
1483 for (i = 0; i < queues->nr_queues; i++) {
1484 struct auxtrace_queue *queue = &pt->queues.queue_array[i];
1485 struct intel_pt_queue *ptq = queue->priv;
1487 if (ptq && (tid == -1 || ptq->tid == tid)) {
1489 intel_pt_set_pid_tid_cpu(pt, queue);
1490 intel_pt_run_decoder(ptq, &ts);
1496 static int intel_pt_lost(struct intel_pt *pt, struct perf_sample *sample)
1498 return intel_pt_synth_error(pt, INTEL_PT_ERR_LOST, sample->cpu,
1499 sample->pid, sample->tid, 0);
1502 static struct intel_pt_queue *intel_pt_cpu_to_ptq(struct intel_pt *pt, int cpu)
1506 if (cpu < 0 || !pt->queues.nr_queues)
1509 if ((unsigned)cpu >= pt->queues.nr_queues)
1510 i = pt->queues.nr_queues - 1;
1514 if (pt->queues.queue_array[i].cpu == cpu)
1515 return pt->queues.queue_array[i].priv;
1517 for (j = 0; i > 0; j++) {
1518 if (pt->queues.queue_array[--i].cpu == cpu)
1519 return pt->queues.queue_array[i].priv;
1522 for (; j < pt->queues.nr_queues; j++) {
1523 if (pt->queues.queue_array[j].cpu == cpu)
1524 return pt->queues.queue_array[j].priv;
1530 static int intel_pt_sync_switch(struct intel_pt *pt, int cpu, pid_t tid,
1533 struct intel_pt_queue *ptq;
1536 if (!pt->sync_switch)
1539 ptq = intel_pt_cpu_to_ptq(pt, cpu);
1543 switch (ptq->switch_state) {
1544 case INTEL_PT_SS_NOT_TRACING:
1547 case INTEL_PT_SS_UNKNOWN:
1548 case INTEL_PT_SS_TRACING:
1549 ptq->next_tid = tid;
1550 ptq->switch_state = INTEL_PT_SS_EXPECTING_SWITCH_IP;
1552 case INTEL_PT_SS_EXPECTING_SWITCH_EVENT:
1553 if (!ptq->on_heap) {
1554 ptq->timestamp = perf_time_to_tsc(timestamp,
1556 err = auxtrace_heap__add(&pt->heap, ptq->queue_nr,
1560 ptq->on_heap = true;
1562 ptq->switch_state = INTEL_PT_SS_TRACING;
1564 case INTEL_PT_SS_EXPECTING_SWITCH_IP:
1565 ptq->next_tid = tid;
1566 intel_pt_log("ERROR: cpu %d expecting switch ip\n", cpu);
1575 static int intel_pt_process_switch(struct intel_pt *pt,
1576 struct perf_sample *sample)
1578 struct perf_evsel *evsel;
1582 evsel = perf_evlist__id2evsel(pt->session->evlist, sample->id);
1583 if (evsel != pt->switch_evsel)
1586 tid = perf_evsel__intval(evsel, sample, "next_pid");
1589 intel_pt_log("sched_switch: cpu %d tid %d time %"PRIu64" tsc %#"PRIx64"\n",
1590 cpu, tid, sample->time, perf_time_to_tsc(sample->time,
1593 ret = intel_pt_sync_switch(pt, cpu, tid, sample->time);
1597 return machine__set_current_tid(pt->machine, cpu, -1, tid);
1600 static int intel_pt_context_switch(struct intel_pt *pt, union perf_event *event,
1601 struct perf_sample *sample)
1603 bool out = event->header.misc & PERF_RECORD_MISC_SWITCH_OUT;
1609 if (pt->have_sched_switch == 3) {
1612 if (event->header.type != PERF_RECORD_SWITCH_CPU_WIDE) {
1613 pr_err("Expecting CPU-wide context switch event\n");
1616 pid = event->context_switch.next_prev_pid;
1617 tid = event->context_switch.next_prev_tid;
1626 pr_err("context_switch event has no tid\n");
1630 intel_pt_log("context_switch: cpu %d pid %d tid %d time %"PRIu64" tsc %#"PRIx64"\n",
1631 cpu, pid, tid, sample->time, perf_time_to_tsc(sample->time,
1634 ret = intel_pt_sync_switch(pt, cpu, tid, sample->time);
1638 return machine__set_current_tid(pt->machine, cpu, pid, tid);
1641 static int intel_pt_process_itrace_start(struct intel_pt *pt,
1642 union perf_event *event,
1643 struct perf_sample *sample)
1645 if (!pt->per_cpu_mmaps)
1648 intel_pt_log("itrace_start: cpu %d pid %d tid %d time %"PRIu64" tsc %#"PRIx64"\n",
1649 sample->cpu, event->itrace_start.pid,
1650 event->itrace_start.tid, sample->time,
1651 perf_time_to_tsc(sample->time, &pt->tc));
1653 return machine__set_current_tid(pt->machine, sample->cpu,
1654 event->itrace_start.pid,
1655 event->itrace_start.tid);
1658 static int intel_pt_process_event(struct perf_session *session,
1659 union perf_event *event,
1660 struct perf_sample *sample,
1661 struct perf_tool *tool)
1663 struct intel_pt *pt = container_of(session->auxtrace, struct intel_pt,
1671 if (!tool->ordered_events) {
1672 pr_err("Intel Processor Trace requires ordered events\n");
1676 if (sample->time && sample->time != (u64)-1)
1677 timestamp = perf_time_to_tsc(sample->time, &pt->tc);
1681 if (timestamp || pt->timeless_decoding) {
1682 err = intel_pt_update_queues(pt);
1687 if (pt->timeless_decoding) {
1688 if (event->header.type == PERF_RECORD_EXIT) {
1689 err = intel_pt_process_timeless_queues(pt,
1693 } else if (timestamp) {
1694 err = intel_pt_process_queues(pt, timestamp);
1699 if (event->header.type == PERF_RECORD_AUX &&
1700 (event->aux.flags & PERF_AUX_FLAG_TRUNCATED) &&
1701 pt->synth_opts.errors) {
1702 err = intel_pt_lost(pt, sample);
1707 if (pt->switch_evsel && event->header.type == PERF_RECORD_SAMPLE)
1708 err = intel_pt_process_switch(pt, sample);
1709 else if (event->header.type == PERF_RECORD_ITRACE_START)
1710 err = intel_pt_process_itrace_start(pt, event, sample);
1711 else if (event->header.type == PERF_RECORD_SWITCH ||
1712 event->header.type == PERF_RECORD_SWITCH_CPU_WIDE)
1713 err = intel_pt_context_switch(pt, event, sample);
1715 intel_pt_log("event %s (%u): cpu %d time %"PRIu64" tsc %#"PRIx64"\n",
1716 perf_event__name(event->header.type), event->header.type,
1717 sample->cpu, sample->time, timestamp);
1722 static int intel_pt_flush(struct perf_session *session, struct perf_tool *tool)
1724 struct intel_pt *pt = container_of(session->auxtrace, struct intel_pt,
1731 if (!tool->ordered_events)
1734 ret = intel_pt_update_queues(pt);
1738 if (pt->timeless_decoding)
1739 return intel_pt_process_timeless_queues(pt, -1,
1742 return intel_pt_process_queues(pt, MAX_TIMESTAMP);
1745 static void intel_pt_free_events(struct perf_session *session)
1747 struct intel_pt *pt = container_of(session->auxtrace, struct intel_pt,
1749 struct auxtrace_queues *queues = &pt->queues;
1752 for (i = 0; i < queues->nr_queues; i++) {
1753 intel_pt_free_queue(queues->queue_array[i].priv);
1754 queues->queue_array[i].priv = NULL;
1756 intel_pt_log_disable();
1757 auxtrace_queues__free(queues);
1760 static void intel_pt_free(struct perf_session *session)
1762 struct intel_pt *pt = container_of(session->auxtrace, struct intel_pt,
1765 auxtrace_heap__free(&pt->heap);
1766 intel_pt_free_events(session);
1767 session->auxtrace = NULL;
1768 thread__put(pt->unknown_thread);
1772 static int intel_pt_process_auxtrace_event(struct perf_session *session,
1773 union perf_event *event,
1774 struct perf_tool *tool __maybe_unused)
1776 struct intel_pt *pt = container_of(session->auxtrace, struct intel_pt,
1779 if (pt->sampling_mode)
1782 if (!pt->data_queued) {
1783 struct auxtrace_buffer *buffer;
1785 int fd = perf_data_file__fd(session->file);
1788 if (perf_data_file__is_pipe(session->file)) {
1791 data_offset = lseek(fd, 0, SEEK_CUR);
1792 if (data_offset == -1)
1796 err = auxtrace_queues__add_event(&pt->queues, session, event,
1797 data_offset, &buffer);
1801 /* Dump here now we have copied a piped trace out of the pipe */
1803 if (auxtrace_buffer__get_data(buffer, fd)) {
1804 intel_pt_dump_event(pt, buffer->data,
1806 auxtrace_buffer__put_data(buffer);
1814 struct intel_pt_synth {
1815 struct perf_tool dummy_tool;
1816 struct perf_session *session;
1819 static int intel_pt_event_synth(struct perf_tool *tool,
1820 union perf_event *event,
1821 struct perf_sample *sample __maybe_unused,
1822 struct machine *machine __maybe_unused)
1824 struct intel_pt_synth *intel_pt_synth =
1825 container_of(tool, struct intel_pt_synth, dummy_tool);
1827 return perf_session__deliver_synth_event(intel_pt_synth->session, event,
1831 static int intel_pt_synth_event(struct perf_session *session,
1832 struct perf_event_attr *attr, u64 id)
1834 struct intel_pt_synth intel_pt_synth;
1836 memset(&intel_pt_synth, 0, sizeof(struct intel_pt_synth));
1837 intel_pt_synth.session = session;
1839 return perf_event__synthesize_attr(&intel_pt_synth.dummy_tool, attr, 1,
1840 &id, intel_pt_event_synth);
1843 static int intel_pt_synth_events(struct intel_pt *pt,
1844 struct perf_session *session)
1846 struct perf_evlist *evlist = session->evlist;
1847 struct perf_evsel *evsel;
1848 struct perf_event_attr attr;
1853 evlist__for_each(evlist, evsel) {
1854 if (evsel->attr.type == pt->pmu_type && evsel->ids) {
1861 pr_debug("There are no selected events with Intel Processor Trace data\n");
1865 memset(&attr, 0, sizeof(struct perf_event_attr));
1866 attr.size = sizeof(struct perf_event_attr);
1867 attr.type = PERF_TYPE_HARDWARE;
1868 attr.sample_type = evsel->attr.sample_type & PERF_SAMPLE_MASK;
1869 attr.sample_type |= PERF_SAMPLE_IP | PERF_SAMPLE_TID |
1871 if (pt->timeless_decoding)
1872 attr.sample_type &= ~(u64)PERF_SAMPLE_TIME;
1874 attr.sample_type |= PERF_SAMPLE_TIME;
1875 if (!pt->per_cpu_mmaps)
1876 attr.sample_type &= ~(u64)PERF_SAMPLE_CPU;
1877 attr.exclude_user = evsel->attr.exclude_user;
1878 attr.exclude_kernel = evsel->attr.exclude_kernel;
1879 attr.exclude_hv = evsel->attr.exclude_hv;
1880 attr.exclude_host = evsel->attr.exclude_host;
1881 attr.exclude_guest = evsel->attr.exclude_guest;
1882 attr.sample_id_all = evsel->attr.sample_id_all;
1883 attr.read_format = evsel->attr.read_format;
1885 id = evsel->id[0] + 1000000000;
1889 if (pt->synth_opts.instructions) {
1890 attr.config = PERF_COUNT_HW_INSTRUCTIONS;
1891 if (pt->synth_opts.period_type == PERF_ITRACE_PERIOD_NANOSECS)
1892 attr.sample_period =
1893 intel_pt_ns_to_ticks(pt, pt->synth_opts.period);
1895 attr.sample_period = pt->synth_opts.period;
1896 pt->instructions_sample_period = attr.sample_period;
1897 if (pt->synth_opts.callchain)
1898 attr.sample_type |= PERF_SAMPLE_CALLCHAIN;
1899 if (pt->synth_opts.last_branch)
1900 attr.sample_type |= PERF_SAMPLE_BRANCH_STACK;
1901 pr_debug("Synthesizing 'instructions' event with id %" PRIu64 " sample type %#" PRIx64 "\n",
1902 id, (u64)attr.sample_type);
1903 err = intel_pt_synth_event(session, &attr, id);
1905 pr_err("%s: failed to synthesize 'instructions' event type\n",
1909 pt->sample_instructions = true;
1910 pt->instructions_sample_type = attr.sample_type;
1911 pt->instructions_id = id;
1915 if (pt->synth_opts.transactions) {
1916 attr.config = PERF_COUNT_HW_INSTRUCTIONS;
1917 attr.sample_period = 1;
1918 if (pt->synth_opts.callchain)
1919 attr.sample_type |= PERF_SAMPLE_CALLCHAIN;
1920 if (pt->synth_opts.last_branch)
1921 attr.sample_type |= PERF_SAMPLE_BRANCH_STACK;
1922 pr_debug("Synthesizing 'transactions' event with id %" PRIu64 " sample type %#" PRIx64 "\n",
1923 id, (u64)attr.sample_type);
1924 err = intel_pt_synth_event(session, &attr, id);
1926 pr_err("%s: failed to synthesize 'transactions' event type\n",
1930 pt->sample_transactions = true;
1931 pt->transactions_id = id;
1933 evlist__for_each(evlist, evsel) {
1934 if (evsel->id && evsel->id[0] == pt->transactions_id) {
1936 zfree(&evsel->name);
1937 evsel->name = strdup("transactions");
1943 if (pt->synth_opts.branches) {
1944 attr.config = PERF_COUNT_HW_BRANCH_INSTRUCTIONS;
1945 attr.sample_period = 1;
1946 attr.sample_type |= PERF_SAMPLE_ADDR;
1947 attr.sample_type &= ~(u64)PERF_SAMPLE_CALLCHAIN;
1948 attr.sample_type &= ~(u64)PERF_SAMPLE_BRANCH_STACK;
1949 pr_debug("Synthesizing 'branches' event with id %" PRIu64 " sample type %#" PRIx64 "\n",
1950 id, (u64)attr.sample_type);
1951 err = intel_pt_synth_event(session, &attr, id);
1953 pr_err("%s: failed to synthesize 'branches' event type\n",
1957 pt->sample_branches = true;
1958 pt->branches_sample_type = attr.sample_type;
1959 pt->branches_id = id;
1962 pt->synth_needs_swap = evsel->needs_swap;
1967 static struct perf_evsel *intel_pt_find_sched_switch(struct perf_evlist *evlist)
1969 struct perf_evsel *evsel;
1971 evlist__for_each_reverse(evlist, evsel) {
1972 const char *name = perf_evsel__name(evsel);
1974 if (!strcmp(name, "sched:sched_switch"))
1981 static bool intel_pt_find_switch(struct perf_evlist *evlist)
1983 struct perf_evsel *evsel;
1985 evlist__for_each(evlist, evsel) {
1986 if (evsel->attr.context_switch)
1993 static int intel_pt_perf_config(const char *var, const char *value, void *data)
1995 struct intel_pt *pt = data;
1997 if (!strcmp(var, "intel-pt.mispred-all"))
1998 pt->mispred_all = perf_config_bool(var, value);
2003 static const char * const intel_pt_info_fmts[] = {
2004 [INTEL_PT_PMU_TYPE] = " PMU Type %"PRId64"\n",
2005 [INTEL_PT_TIME_SHIFT] = " Time Shift %"PRIu64"\n",
2006 [INTEL_PT_TIME_MULT] = " Time Muliplier %"PRIu64"\n",
2007 [INTEL_PT_TIME_ZERO] = " Time Zero %"PRIu64"\n",
2008 [INTEL_PT_CAP_USER_TIME_ZERO] = " Cap Time Zero %"PRId64"\n",
2009 [INTEL_PT_TSC_BIT] = " TSC bit %#"PRIx64"\n",
2010 [INTEL_PT_NORETCOMP_BIT] = " NoRETComp bit %#"PRIx64"\n",
2011 [INTEL_PT_HAVE_SCHED_SWITCH] = " Have sched_switch %"PRId64"\n",
2012 [INTEL_PT_SNAPSHOT_MODE] = " Snapshot mode %"PRId64"\n",
2013 [INTEL_PT_PER_CPU_MMAPS] = " Per-cpu maps %"PRId64"\n",
2014 [INTEL_PT_MTC_BIT] = " MTC bit %#"PRIx64"\n",
2015 [INTEL_PT_TSC_CTC_N] = " TSC:CTC numerator %"PRIu64"\n",
2016 [INTEL_PT_TSC_CTC_D] = " TSC:CTC denominator %"PRIu64"\n",
2017 [INTEL_PT_CYC_BIT] = " CYC bit %#"PRIx64"\n",
2020 static void intel_pt_print_info(u64 *arr, int start, int finish)
2027 for (i = start; i <= finish; i++)
2028 fprintf(stdout, intel_pt_info_fmts[i], arr[i]);
2031 int intel_pt_process_auxtrace_info(union perf_event *event,
2032 struct perf_session *session)
2034 struct auxtrace_info_event *auxtrace_info = &event->auxtrace_info;
2035 size_t min_sz = sizeof(u64) * INTEL_PT_PER_CPU_MMAPS;
2036 struct intel_pt *pt;
2039 if (auxtrace_info->header.size < sizeof(struct auxtrace_info_event) +
2043 pt = zalloc(sizeof(struct intel_pt));
2047 perf_config(intel_pt_perf_config, pt);
2049 err = auxtrace_queues__init(&pt->queues);
2053 intel_pt_log_set_name(INTEL_PT_PMU_NAME);
2055 pt->session = session;
2056 pt->machine = &session->machines.host; /* No kvm support */
2057 pt->auxtrace_type = auxtrace_info->type;
2058 pt->pmu_type = auxtrace_info->priv[INTEL_PT_PMU_TYPE];
2059 pt->tc.time_shift = auxtrace_info->priv[INTEL_PT_TIME_SHIFT];
2060 pt->tc.time_mult = auxtrace_info->priv[INTEL_PT_TIME_MULT];
2061 pt->tc.time_zero = auxtrace_info->priv[INTEL_PT_TIME_ZERO];
2062 pt->cap_user_time_zero = auxtrace_info->priv[INTEL_PT_CAP_USER_TIME_ZERO];
2063 pt->tsc_bit = auxtrace_info->priv[INTEL_PT_TSC_BIT];
2064 pt->noretcomp_bit = auxtrace_info->priv[INTEL_PT_NORETCOMP_BIT];
2065 pt->have_sched_switch = auxtrace_info->priv[INTEL_PT_HAVE_SCHED_SWITCH];
2066 pt->snapshot_mode = auxtrace_info->priv[INTEL_PT_SNAPSHOT_MODE];
2067 pt->per_cpu_mmaps = auxtrace_info->priv[INTEL_PT_PER_CPU_MMAPS];
2068 intel_pt_print_info(&auxtrace_info->priv[0], INTEL_PT_PMU_TYPE,
2069 INTEL_PT_PER_CPU_MMAPS);
2071 if (auxtrace_info->header.size >= sizeof(struct auxtrace_info_event) +
2072 (sizeof(u64) * INTEL_PT_CYC_BIT)) {
2073 pt->mtc_bit = auxtrace_info->priv[INTEL_PT_MTC_BIT];
2074 pt->mtc_freq_bits = auxtrace_info->priv[INTEL_PT_MTC_FREQ_BITS];
2075 pt->tsc_ctc_ratio_n = auxtrace_info->priv[INTEL_PT_TSC_CTC_N];
2076 pt->tsc_ctc_ratio_d = auxtrace_info->priv[INTEL_PT_TSC_CTC_D];
2077 pt->cyc_bit = auxtrace_info->priv[INTEL_PT_CYC_BIT];
2078 intel_pt_print_info(&auxtrace_info->priv[0], INTEL_PT_MTC_BIT,
2082 pt->timeless_decoding = intel_pt_timeless_decoding(pt);
2083 pt->have_tsc = intel_pt_have_tsc(pt);
2084 pt->sampling_mode = false;
2085 pt->est_tsc = !pt->timeless_decoding;
2087 pt->unknown_thread = thread__new(999999999, 999999999);
2088 if (!pt->unknown_thread) {
2090 goto err_free_queues;
2094 * Since this thread will not be kept in any rbtree not in a
2095 * list, initialize its list node so that at thread__put() the
2096 * current thread lifetime assuption is kept and we don't segfault
2097 * at list_del_init().
2099 INIT_LIST_HEAD(&pt->unknown_thread->node);
2101 err = thread__set_comm(pt->unknown_thread, "unknown", 0);
2103 goto err_delete_thread;
2104 if (thread__init_map_groups(pt->unknown_thread, pt->machine)) {
2106 goto err_delete_thread;
2109 pt->auxtrace.process_event = intel_pt_process_event;
2110 pt->auxtrace.process_auxtrace_event = intel_pt_process_auxtrace_event;
2111 pt->auxtrace.flush_events = intel_pt_flush;
2112 pt->auxtrace.free_events = intel_pt_free_events;
2113 pt->auxtrace.free = intel_pt_free;
2114 session->auxtrace = &pt->auxtrace;
2119 if (pt->have_sched_switch == 1) {
2120 pt->switch_evsel = intel_pt_find_sched_switch(session->evlist);
2121 if (!pt->switch_evsel) {
2122 pr_err("%s: missing sched_switch event\n", __func__);
2123 goto err_delete_thread;
2125 } else if (pt->have_sched_switch == 2 &&
2126 !intel_pt_find_switch(session->evlist)) {
2127 pr_err("%s: missing context_switch attribute flag\n", __func__);
2128 goto err_delete_thread;
2131 if (session->itrace_synth_opts && session->itrace_synth_opts->set) {
2132 pt->synth_opts = *session->itrace_synth_opts;
2134 itrace_synth_opts__set_default(&pt->synth_opts);
2135 if (use_browser != -1) {
2136 pt->synth_opts.branches = false;
2137 pt->synth_opts.callchain = true;
2141 if (pt->synth_opts.log)
2142 intel_pt_log_enable();
2144 /* Maximum non-turbo ratio is TSC freq / 100 MHz */
2145 if (pt->tc.time_mult) {
2146 u64 tsc_freq = intel_pt_ns_to_ticks(pt, 1000000000);
2148 pt->max_non_turbo_ratio = (tsc_freq + 50000000) / 100000000;
2149 intel_pt_log("TSC frequency %"PRIu64"\n", tsc_freq);
2150 intel_pt_log("Maximum non-turbo ratio %u\n",
2151 pt->max_non_turbo_ratio);
2154 if (pt->synth_opts.calls)
2155 pt->branches_filter |= PERF_IP_FLAG_CALL | PERF_IP_FLAG_ASYNC |
2156 PERF_IP_FLAG_TRACE_END;
2157 if (pt->synth_opts.returns)
2158 pt->branches_filter |= PERF_IP_FLAG_RETURN |
2159 PERF_IP_FLAG_TRACE_BEGIN;
2161 if (pt->synth_opts.callchain && !symbol_conf.use_callchain) {
2162 symbol_conf.use_callchain = true;
2163 if (callchain_register_param(&callchain_param) < 0) {
2164 symbol_conf.use_callchain = false;
2165 pt->synth_opts.callchain = false;
2169 err = intel_pt_synth_events(pt, session);
2171 goto err_delete_thread;
2173 err = auxtrace_queues__process_index(&pt->queues, session);
2175 goto err_delete_thread;
2177 if (pt->queues.populated)
2178 pt->data_queued = true;
2180 if (pt->timeless_decoding)
2181 pr_debug2("Intel PT decoding without timestamps\n");
2186 thread__zput(pt->unknown_thread);
2188 intel_pt_log_disable();
2189 auxtrace_queues__free(&pt->queues);
2190 session->auxtrace = NULL;