diff options
| author | Adrian Hunter <adrian.hunter@intel.com> | 2021-04-30 10:03:06 +0300 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2021-05-12 18:43:11 +0300 |
| commit | 5ac35d778a40c9f244a38920247ad41a44c66a02 (patch) | |
| tree | ce82f0da7c76faa0f815d8eba7e2121098dc8640 /tools/perf/util/intel-pt.c | |
| parent | 0fc9d338944254561289e8639ac05ebf72b4b082 (diff) | |
| download | linux-5ac35d778a40c9f244a38920247ad41a44c66a02.tar.xz | |
perf intel-pt: Pass the first timestamp to the decoder
VM Time Correlation will use time ranges to determine whether a TSC packet
belongs to the Host or Guest. To start, the first non-zero timestamp is
needed. Pass that to the decoder.
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Reviewed-by: Andi Kleen <ak@linux.intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Link: https://lore.kernel.org/r/20210430070309.17624-10-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/util/intel-pt.c')
| -rw-r--r-- | tools/perf/util/intel-pt.c | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/tools/perf/util/intel-pt.c b/tools/perf/util/intel-pt.c index 8f6df8eec9b8..858b679d00be 100644 --- a/tools/perf/util/intel-pt.c +++ b/tools/perf/util/intel-pt.c @@ -78,6 +78,7 @@ struct intel_pt { u64 kernel_start; u64 switch_ip; u64 ptss_ip; + u64 first_timestamp; struct perf_tsc_conversion tc; bool cap_user_time_zero; @@ -1181,6 +1182,7 @@ static struct intel_pt_queue *intel_pt_alloc_queue(struct intel_pt *pt, params.tsc_ctc_ratio_n = pt->tsc_ctc_ratio_n; params.tsc_ctc_ratio_d = pt->tsc_ctc_ratio_d; params.quick = pt->synth_opts.quick; + params.first_timestamp = pt->first_timestamp; if (pt->filts.cnt > 0) params.pgd_ip = intel_pt_pgd_ip; @@ -1245,6 +1247,21 @@ static void intel_pt_free_queue(void *priv) free(ptq); } +static void intel_pt_first_timestamp(struct intel_pt *pt, u64 timestamp) +{ + unsigned int i; + + pt->first_timestamp = timestamp; + + for (i = 0; i < pt->queues.nr_queues; i++) { + struct auxtrace_queue *queue = &pt->queues.queue_array[i]; + struct intel_pt_queue *ptq = queue->priv; + + if (ptq && ptq->decoder) + intel_pt_set_first_timestamp(ptq->decoder, timestamp); + } +} + static void intel_pt_set_pid_tid_cpu(struct intel_pt *pt, struct auxtrace_queue *queue) { @@ -2947,6 +2964,8 @@ static int intel_pt_process_event(struct perf_session *session, sample->time); } } else if (timestamp) { + if (!pt->first_timestamp) + intel_pt_first_timestamp(pt, timestamp); err = intel_pt_process_queues(pt, timestamp); } if (err) |