Commit c38dab7d authored Mar 14, 2019 by Andi Kleen Committed by Arnaldo Carvalho de Melo Mar 19, 2019

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@linux.intel.com>
Acked-by: Jiri Olsa <jolsa@kernel.org>
LPU-Reference: 20190314225002.30108-4-andi@firstfloor.org
Link: https://lkml.kernel.org/n/tip-9yecyuha04nyg8toyd1b2pgi@git.kernel.org


Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

parent 03724b2e

tools/perf/builtin-record.c

+2 −2

Original line number	Diff line number	Diff line
		@@ -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"),