diff options
| author | Adrian Hunter <adrian.hunter@intel.com> | 2020-07-10 18:11:00 +0300 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2020-08-06 08:23:00 -0300 |
| commit | 8b83fccdd2fc91dfd6fc7ef6a804c1426f7a6216 (patch) | |
| tree | f514f866d7801fdafa41f8384f501de140329474 /tools/perf/Documentation | |
| parent | 935aac2d2dc42c6ea9f0143a57e8d57d976d5307 (diff) | |
perf intel-pt: Use itrace debug log flags to suppress some messages
The "d" option may be followed by flags which affect what debug messages
will or will not be logged. Each flag must be preceded by either '+' or
'-'. The flags support by Intel PT are:
-a Suppress logging of perf events
Suppressing perf events is useful for decreasing the size of the log.
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Reviewed-by: Andi Kleen <ak@linux.intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Link: http://lore.kernel.org/lkml/20200710151104.15137-9-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, 4 insertions, 1 deletions
diff --git a/tools/perf/Documentation/perf-intel-pt.txt b/tools/perf/Documentation/perf-intel-pt.txt index 20ac592a2641..d22dead7bbe0 100644 --- a/tools/perf/Documentation/perf-intel-pt.txt +++ b/tools/perf/Documentation/perf-intel-pt.txt @@ -882,7 +882,10 @@ For example, for errors but not overflow or data lost errors: The "d" option will cause the creation of a file "intel_pt.log" containing all decoded packets and instructions. Note that this option slows down the decoder -and that the resulting file may be very large. +and that the resulting file may be very large. The "d" option may be followed +by flags which affect what debug messages will or will not be logged. Each flag +must be preceded by either '+' or '-'. The flags support by Intel PT are: + -a Suppress logging of perf events In addition, the period of the "instructions" event can be specified. e.g. |