linux-kernel - [PATCH 1/3] perf lock: Add --synth=no option for record

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Message-Id: <20220323230259.288494-1-namhyung@kernel.org>
Date:   Wed, 23 Mar 2022 16:02:57 -0700
From:   Namhyung Kim <namhyung@...nel.org>
To:     Arnaldo Carvalho de Melo <acme@...nel.org>,
        Jiri Olsa <jolsa@...hat.com>
Cc:     Ingo Molnar <mingo@...nel.org>,
        Peter Zijlstra <peterz@...radead.org>,
        LKML <linux-kernel@...r.kernel.org>,
        Andi Kleen <ak@...ux.intel.com>,
        Ian Rogers <irogers@...gle.com>
Subject: [PATCH 1/3] perf lock: Add --synth=no option for record

The perf lock command has nothing to symbolize and lock names come
from the tracepoint.  Moreover, kernel symbols are available even the
--synth=no option is given.

This will reduce the startup time by avoiding unnecessary synthesis.

Signed-off-by: Namhyung Kim <namhyung@...nel.org>
---
 tools/perf/builtin-lock.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/perf/builtin-lock.c b/tools/perf/builtin-lock.c
index 57b9ebd7118a..1ebff88bc5ba 100644
--- a/tools/perf/builtin-lock.c
+++ b/tools/perf/builtin-lock.c
@@ -990,7 +990,7 @@ static int __cmd_report(bool display_info)
 static int __cmd_record(int argc, const char **argv)
 {
 	const char *record_args[] = {
-		"record", "-R", "-m", "1024", "-c", "1",
+		"record", "-R", "-m", "1024", "-c", "1", "--synth", "no",
 	};
 	unsigned int rec_argc, i, j, ret;
 	const char **rec_argv;
-- 
2.35.1.894.gb6a874cedc-goog