diff options
| -rw-r--r-- | tools/perf/Documentation/perf-intel-pt.txt | 5 | ||||
| -rw-r--r-- | tools/perf/util/intel-pt.c | 2 |
2 files changed, 6 insertions, 1 deletions
diff --git a/tools/perf/Documentation/perf-intel-pt.txt b/tools/perf/Documentation/perf-intel-pt.txt index 1dcec73c910c..33df7898c378 100644 --- a/tools/perf/Documentation/perf-intel-pt.txt +++ b/tools/perf/Documentation/perf-intel-pt.txt @@ -869,6 +869,7 @@ The letters are: L synthesize last branch entries on existing event records s skip initial number of events q quicker (less detailed) decoding + Z prefer to ignore timestamps (so-called "timeless" decoding) "Instructions" events look like they were recorded by "perf record -e instructions". @@ -1062,6 +1063,10 @@ What *will* be decoded with the qq option: - instruction pointer associated with PSB packets +The Z option is equivalent to having recorded a trace without TSC +(i.e. config term tsc=0). It can be useful to avoid timestamp issues when +decoding a trace of a virtual machine. + dump option ~~~~~~~~~~~ diff --git a/tools/perf/util/intel-pt.c b/tools/perf/util/intel-pt.c index eef8970d98fe..7bee969eb335 100644 --- a/tools/perf/util/intel-pt.c +++ b/tools/perf/util/intel-pt.c @@ -899,7 +899,7 @@ static bool intel_pt_timeless_decoding(struct intel_pt *pt) bool timeless_decoding = true; u64 config; - if (!pt->tsc_bit || !pt->cap_user_time_zero) + if (!pt->tsc_bit || !pt->cap_user_time_zero || pt->synth_opts.timeless_decoding) return true; evlist__for_each_entry(pt->session->evlist, evsel) { |