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Commit 60437ac0 authored by Jiri Olsa's avatar Jiri Olsa Committed by Arnaldo Carvalho de Melo
Browse files

perf record: Fix --switch-output documentation and comment 



There's no --signal-trigger option, also adding the code comment into
record man page.

Signed-off-by: default avatarJiri Olsa <jolsa@kernel.org>
Tested-by: default avatarWang Nan <wangnan0@huawei.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1483431600-19887-4-git-send-email-jolsa@kernel.org


Signed-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
parent efd21307

tools/perf/Documentation/perf-record.txt

+4 −0
Original line number Diff line number Diff line
@@ -430,6 +430,10 @@ that gets then processed, possibly via a perf script, to decide if that 
particular perf.data snapshot should be kept or not.



Implies --timestamp-filename, --no-buildid and --no-buildid-cache.

The reason for the latter two is to reduce the data file switching

overhead. You can still switch them on with:



  --switch-output --no-no-buildid  --no-no-buildid-cache



--dry-run::

Parse options then exit. --dry-run can be used to detect errors in cmdline

tools/perf/builtin-record.c

+1 −1
Original line number Diff line number Diff line
@@ -1636,7 +1636,7 @@ int cmd_record(int argc, const char **argv, const char *prefix __maybe_unused) 
		 * overhead. Still generate buildid if they are required

		 * explicitly using

		 *

		 *  perf record --signal-trigger --no-no-buildid \

		 *  perf record --switch-output --no-no-buildid \

		 *              --no-no-buildid-cache

		 *

		 * Following code equals to: