diff options
| author | Kan Liang <kan.liang@intel.com> | 2015-08-04 04:30:19 -0400 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2015-08-05 12:50:52 -0300 |
| commit | 320677123905fd1dd122895cd5fb870ee9e1380b (patch) | |
| tree | 82b523328ec900684341656326ec6bf0a1e5e382 /tools/perf/util/evsel.h | |
| parent | 34221118cb13f8b37480bce7286a1b44e90773d8 (diff) | |
perf tools: Per-event time support
This patchkit adds the ability to turn off time stamps per event.
One usaful case for partial time is to work with per-event callgraph to
enable "PEBS threshold > 1" (https://lkml.org/lkml/2015/5/10/196), which
can significantly reduce the sampling overhead.
The event samples with time stamps off will not be ordered.
Signed-off-by: Kan Liang <kan.liang@intel.com>
Acked-by: Jiri Olsa <jolsa@kernel.org>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Link: http://lkml.kernel.org/r/1438677022-34296-2-git-send-email-kan.liang@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/util/evsel.h')
| -rw-r--r-- | tools/perf/util/evsel.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/tools/perf/util/evsel.h b/tools/perf/util/evsel.h index a7d2175358b8..6a129081f3ad 100644 --- a/tools/perf/util/evsel.h +++ b/tools/perf/util/evsel.h @@ -39,6 +39,7 @@ struct cgroup_sel; */ enum { PERF_EVSEL__CONFIG_TERM_PERIOD, + PERF_EVSEL__CONFIG_TERM_TIME, PERF_EVSEL__CONFIG_TERM_MAX, }; @@ -47,6 +48,7 @@ struct perf_evsel_config_term { int type; union { u64 period; + bool time; } val; }; |