perf record: Clarify help for --switch-output

[linux-2.6-microblaze.git] / tools / perf / builtin-record.c

diff --git a/tools/perf/builtin-record.c b/tools/perf/builtin-record.c
index 02d7c40..e7144a1 100644 (file)
--- 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"),