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-rw-r--r--tools/perf/Documentation/perf-record.txt27
1 files changed, 23 insertions, 4 deletions
diff --git a/tools/perf/Documentation/perf-record.txt b/tools/perf/Documentation/perf-record.txt
index 4847a793de65..9b9d9d086680 100644
--- a/tools/perf/Documentation/perf-record.txt
+++ b/tools/perf/Documentation/perf-record.txt
@@ -108,6 +108,8 @@ OPTIONS
Number of mmap data pages (must be a power of two) or size
specification with appended unit character - B/K/M/G. The
size is rounded up to have nearest pages power of two value.
+ Also, by adding a comma, the number of mmap pages for AUX
+ area tracing can be specified.
--group::
Put all events in a single event group. This precedes the --event
@@ -145,16 +147,21 @@ OPTIONS
-s::
--stat::
- Per thread counts.
+ Record per-thread event counts. Use it with 'perf report -T' to see
+ the values.
-d::
--data::
- Sample addresses.
+ Record the sample addresses.
-T::
--timestamp::
- Sample timestamps. Use it with 'perf report -D' to see the timestamps,
- for instance.
+ Record the sample timestamps. Use it with 'perf report -D' to see the
+ timestamps, for instance.
+
+-P::
+--period::
+ Record the sample period.
-n::
--no-samples::
@@ -257,6 +264,18 @@ 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.
+
+--proc-map-timeout::
+When processing pre-existing threads /proc/XXX/mmap, it may take a long time,
+because the file may be huge. A time out is needed in such cases.
+This option sets the time out limit. The default value is 500 ms.
+
SEE ALSO
--------
linkperf:perf-stat[1], linkperf:perf-list[1]