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| author | Adrian Hunter <adrian.hunter@intel.com> | 2020-07-10 18:11:01 +0300 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2020-08-06 14:23:19 +0300 |
| commit | d4575f5fce71b47431a98096a9f74b7492854633 (patch) | |
| tree | 0962d92875343ccbc93995219cac6db6e740cb62 /tools/perf/Documentation | |
| parent | 8b83fccdd2fc91dfd6fc7ef6a804c1426f7a6216 (diff) | |
| download | linux-d4575f5fce71b47431a98096a9f74b7492854633.tar.xz | |
perf intel-pt: Time filter logged perf events
Change the debug logging (when used with the --time option) to time
filter logged perf events, but allow that to be overridden by using
"d+a" instead of plain "d".
That can reduce the size of the log file.
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/20200710151104.15137-10-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 | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/tools/perf/Documentation/perf-intel-pt.txt b/tools/perf/Documentation/perf-intel-pt.txt index d22dead7bbe0..4666e4a83615 100644 --- a/tools/perf/Documentation/perf-intel-pt.txt +++ b/tools/perf/Documentation/perf-intel-pt.txt @@ -886,6 +886,9 @@ 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 + +a Log all perf events +By default, logged perf events are filtered by any specified time ranges, but +flag +a overrides that. In addition, the period of the "instructions" event can be specified. e.g. |