Commit-ID: c38dab7df7ee4fdecd51e390d4d33d5ef5cff49d
Gitweb: https://git.kernel.org/tip/c38dab7df7ee4fdecd51e390d4d33d5ef5cff49d
Author: Andi Kleen <ak@xxxxxxxxxxxxxxx>
AuthorDate: Thu, 14 Mar 2019 15:49:56 -0700
Committer: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
CommitDate: Tue, 19 Mar 2019 16:15:42 -0300
perf record: Clarify help for --switch-output
The help description for --switch-output looks like there are multiple
comma separated fields. But it's actually a choice of different options.
Make it clear and less confusing.
Before:
% perf record -h
...
--switch-output[=<signal,size,time>]
Switch output when receive SIGUSR2 or cross size,time threshold
After:
% perf record -h
...
--switch-output[=<signal or size[BKMG] or time[smhd]>]
Switch output when receiving SIGUSR2 (signal) or cross a size or time threshold
Signed-off-by: Andi Kleen <ak@xxxxxxxxxxxxxxx>
Acked-by: Jiri Olsa <jolsa@xxxxxxxxxx>
LPU-Reference: 20190314225002.30108-4-andi@xxxxxxxxxxxxxx
Link: https://lkml.kernel.org/n/tip-9yecyuha04nyg8toyd1b2pgi@xxxxxxxxxxxxxx
Signed-off-by: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
---
tools/perf/builtin-record.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/tools/perf/builtin-record.c b/tools/perf/builtin-record.c
index 02d7c40b2d10..e7144a1c1c82 100644
--- a/tools/perf/builtin-record.c
+++ b/tools/perf/builtin-record.c
@@ -1989,8 +1989,8 @@ static struct option __record_options[] = {
OPT_BOOLEAN(0, "timestamp-boundary", &record.timestamp_boundary,
"Record timestamp boundary (time of first/last samples)"),
OPT_STRING_OPTARG_SET(0, "switch-output", &record.switch_output.str,
- &record.switch_output.set, "signal,size,time",
- "Switch output when receive SIGUSR2 or cross size,time threshold",
+ &record.switch_output.set, "signal or size[BKMG] or time[smhd]",
+ "Switch output when receiving SIGUSR2 (signal) or cross a size or time threshold",
"signal"),
OPT_INTEGER(0, "switch-max-files", &record.switch_output.num_files,
"Limit number of switch output generated files"),
|