diff options
| author | Adrian Hunter <adrian.hunter@intel.com> | 2019-06-10 10:27:58 +0300 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2019-06-17 15:57:18 -0300 |
| commit | 9d0bc53e35b82e429ab698d112f7af4336578735 (patch) | |
| tree | 4ad7bf4854f5ff42c14e0d61d1a2f9dc1a12adc3 | |
| parent | 0dfded34a2e3b517c149ee9c7d1e5173025017b7 (diff) | |
perf intel-pt: Synthesize PEBS sample basic information
Synthesize a PEBS sample using basic information (ip, timestamp) only.
Other PEBS information will be added in later patches.
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Link: http://lkml.kernel.org/r/20190610072803.10456-7-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
| -rw-r--r-- | tools/perf/util/intel-pt.c | 52 |
1 files changed, 50 insertions, 2 deletions
diff --git a/tools/perf/util/intel-pt.c b/tools/perf/util/intel-pt.c index a2d90b2f1f11..979519b00a74 100644 --- a/tools/perf/util/intel-pt.c +++ b/tools/perf/util/intel-pt.c @@ -1547,9 +1547,57 @@ static int intel_pt_synth_pwrx_sample(struct intel_pt_queue *ptq) pt->pwr_events_sample_type); } -static int intel_pt_synth_pebs_sample(struct intel_pt_queue *ptq __maybe_unused) +static int intel_pt_synth_pebs_sample(struct intel_pt_queue *ptq) { - return 0; + const struct intel_pt_blk_items *items = &ptq->state->items; + struct perf_sample sample = { .ip = 0, }; + union perf_event *event = ptq->event_buf; + struct intel_pt *pt = ptq->pt; + struct perf_evsel *evsel = pt->pebs_evsel; + u64 sample_type = evsel->attr.sample_type; + u64 id = evsel->id[0]; + u8 cpumode; + + if (intel_pt_skip_event(pt)) + return 0; + + intel_pt_prep_a_sample(ptq, event, &sample); + + sample.id = id; + sample.stream_id = id; + + if (!evsel->attr.freq) + sample.period = evsel->attr.sample_period; + + /* No support for non-zero CS base */ + if (items->has_ip) + sample.ip = items->ip; + else if (items->has_rip) + sample.ip = items->rip; + else + sample.ip = ptq->state->from_ip; + + /* No support for guest mode at this time */ + cpumode = sample.ip < ptq->pt->kernel_start ? + PERF_RECORD_MISC_USER : + PERF_RECORD_MISC_KERNEL; + + event->sample.header.misc = cpumode | PERF_RECORD_MISC_EXACT_IP; + + sample.cpumode = cpumode; + + if (sample_type & PERF_SAMPLE_TIME) { + u64 timestamp = 0; + + if (items->has_timestamp) + timestamp = items->timestamp; + else if (!pt->timeless_decoding) + timestamp = ptq->timestamp; + if (timestamp) + sample.time = tsc_to_perf_time(timestamp, &pt->tc); + } + + return intel_pt_deliver_synth_event(pt, ptq, event, &sample, sample_type); } static int intel_pt_synth_error(struct intel_pt *pt, int code, int cpu, |