From c38dab7df7ee4fdecd51e390d4d33d5ef5cff49d Mon Sep 17 00:00:00 2001 From: Andi Kleen Date: Thu, 14 Mar 2019 15:49:56 -0700 Subject: [PATCH] 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[=] Switch output when receive SIGUSR2 or cross size,time threshold After: % perf record -h ... --switch-output[=] Switch output when receiving SIGUSR2 (signal) or cross a size or time threshold Signed-off-by: Andi Kleen Acked-by: Jiri Olsa 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 --- 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"), -- 2.11.0