From: Namhyung Kim <namhyung@kernel.org>
To: Arnaldo Carvalho de Melo <acme@kernel.org>, Jiri Olsa <jolsa@kernel.org>
Cc: Ian Rogers <irogers@google.com>,
Adrian Hunter <adrian.hunter@intel.com>,
Peter Zijlstra <peterz@infradead.org>,
Ingo Molnar <mingo@kernel.org>,
LKML <linux-kernel@vger.kernel.org>,
linux-perf-users@vger.kernel.org,
Changbin Du <changbin.du@huawei.com>
Subject: [PATCH] perf ftrace latency: Remove unnecessary "--" from --use-nsec option
Date: Thu, 25 May 2023 14:20:38 -0700 [thread overview]
Message-ID: <20230525212038.3535851-1-namhyung@kernel.org> (raw)
The option name should not have the dashes. Current version shows four
dashes for the option.
$ perf ftrace latency -h
Usage: perf ftrace [<options>] [<command>]
or: perf ftrace [<options>] -- [<command>] [<options>]
or: perf ftrace {trace|latency} [<options>] [<command>]
or: perf ftrace {trace|latency} [<options>] -- [<command>] [<options>]
-b, --use-bpf Use BPF to measure function latency
-n, ----use-nsec Use nano-second histogram
-T, --trace-funcs <func>
Show latency of given function
Fixes: 84005bb61486 ("perf ftrace latency: Add -n/--use-nsec option")
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
---
tools/perf/builtin-ftrace.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/tools/perf/builtin-ftrace.c b/tools/perf/builtin-ftrace.c
index ad2a9ae041f6..ac2e6c75f912 100644
--- a/tools/perf/builtin-ftrace.c
+++ b/tools/perf/builtin-ftrace.c
@@ -1177,7 +1177,7 @@ int cmd_ftrace(int argc, const char **argv)
OPT_BOOLEAN('b', "use-bpf", &ftrace.target.use_bpf,
"Use BPF to measure function latency"),
#endif
- OPT_BOOLEAN('n', "--use-nsec", &ftrace.use_nsec,
+ OPT_BOOLEAN('n', "use-nsec", &ftrace.use_nsec,
"Use nano-second histogram"),
OPT_PARENT(common_options),
};
--
2.41.0.rc0.172.g3f132b7071-goog
next reply other threads:[~2023-05-25 21:20 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-05-25 21:20 Namhyung Kim [this message]
2023-05-26 18:19 ` [PATCH] perf ftrace latency: Remove unnecessary "--" from --use-nsec option Arnaldo Carvalho de Melo
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