diff options
| author | Adrian Hunter <adrian.hunter@intel.com> | 2021-04-30 10:03:00 +0300 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2021-05-12 12:43:10 -0300 |
| commit | e9d64739635f8db204c9fc81f20ed70751b4e0dd (patch) | |
| tree | 02079fbabb89cae96a9d8c0a1e23f137d89814a4 /tools/perf/Documentation | |
| parent | 856ecd6ab4944b18fd3647c21ad8737d8e736025 (diff) | |
perf intel-pt: Support Z itrace option for timeless decoding
Correlating virtual machine TSC packets is not supported at present, so
instead support the Z itrace option.
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/20210430070309.17624-4-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/Documentation')
| -rw-r--r-- | tools/perf/Documentation/perf-intel-pt.txt | 5 |
1 files changed, 5 insertions, 0 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 ~~~~~~~~~~~ |