diff options
| author | Adrian Hunter <adrian.hunter@intel.com> | 2015-04-30 16:37:32 +0200 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2015-05-05 23:13:01 +0200 |
| commit | 2dd6d8a10a942c5fd8950d1046e172237d009c8e (patch) | |
| tree | 82ad3631bba2e44f3817ed2a55f6d4f0ff8253d2 /tools/perf/Documentation | |
| parent | perf tools: Add AUX area tracing Snapshot Mode (diff) | |
| download | linux-2dd6d8a10a942c5fd8950d1046e172237d009c8e.tar.xz linux-2dd6d8a10a942c5fd8950d1046e172237d009c8e.zip | |
perf record: Add AUX area tracing Snapshot Mode support
Add a new option and support for Instruction Tracing Snapshot Mode.
When the new option is selected, no AUX area tracing data is captured
until a signal (SIGUSR2) is received.
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Acked-by: Jiri Olsa <jolsa@kernel.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Namhyung Kim <namhyung@gmail.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/r/1430404667-10593-10-git-send-email-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-record.txt | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/tools/perf/Documentation/perf-record.txt b/tools/perf/Documentation/perf-record.txt index 76a141e326da..57dd57bcef95 100644 --- a/tools/perf/Documentation/perf-record.txt +++ b/tools/perf/Documentation/perf-record.txt @@ -259,6 +259,13 @@ records. See clock_gettime(). In particular CLOCK_MONOTONIC and CLOCK_MONOTONIC_RAW are supported, some events might also allow CLOCK_BOOTTIME, CLOCK_REALTIME and CLOCK_TAI. +-S:: +--snapshot:: +Select AUX area tracing Snapshot Mode. This option is valid only with an +AUX area tracing event. Optionally the number of bytes to capture per +snapshot can be specified. In Snapshot Mode, trace data is captured only when +signal SIGUSR2 is received. + SEE ALSO -------- linkperf:perf-stat[1], linkperf:perf-list[1] |