linux-kernel - [PATCH 2/3] perf lock: Add -q/--quiet option

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Message-Id: <20220924004221.841024-2-namhyung@kernel.org>
Date:   Fri, 23 Sep 2022 17:42:20 -0700
From:   Namhyung Kim <namhyung@...nel.org>
To:     Arnaldo Carvalho de Melo <acme@...nel.org>,
        Jiri Olsa <jolsa@...nel.org>
Cc:     Ingo Molnar <mingo@...nel.org>,
        Peter Zijlstra <peterz@...radead.org>,
        LKML <linux-kernel@...r.kernel.org>,
        Ian Rogers <irogers@...gle.com>,
        Adrian Hunter <adrian.hunter@...el.com>,
        linux-perf-users@...r.kernel.org
Subject: [PATCH 2/3] perf lock: Add -q/--quiet option

Like perf report, this option is to suppress header and debug messages.

Signed-off-by: Namhyung Kim <namhyung@...nel.org>
---
 tools/perf/Documentation/perf-lock.txt |  4 ++++
 tools/perf/builtin-lock.c              | 27 +++++++++++++++-----------
 2 files changed, 20 insertions(+), 11 deletions(-)

diff --git a/tools/perf/Documentation/perf-lock.txt b/tools/perf/Documentation/perf-lock.txt
index b23e76200ac2..3b1e16563b79 100644
--- a/tools/perf/Documentation/perf-lock.txt
+++ b/tools/perf/Documentation/perf-lock.txt
@@ -40,6 +40,10 @@ COMMON OPTIONS
 --verbose::
         Be more verbose (show symbol address, etc).
 
+-q::
+--quiet::
+	Do not show any message. (Suppress -v)
+
 -D::
 --dump-raw-trace::
         Dump raw trace in ASCII.
diff --git a/tools/perf/builtin-lock.c b/tools/perf/builtin-lock.c
index 1c0d52384d9e..9722d4ab2e55 100644
--- a/tools/perf/builtin-lock.c
+++ b/tools/perf/builtin-lock.c
@@ -1250,7 +1250,7 @@ static void print_bad_events(int bad, int total)
 	for (i = 0; i < BROKEN_MAX; i++)
 		broken += bad_hist[i];
 
-	if (broken == 0 && !verbose)
+	if (quiet || (broken == 0 && !verbose))
 		return;
 
 	pr_info("\n=== output for debug===\n\n");
@@ -1269,10 +1269,12 @@ static void print_result(void)
 	char cut_name[20];
 	int bad, total, printed;
 
-	pr_info("%20s ", "Name");
-	list_for_each_entry(key, &lock_keys, list)
-		pr_info("%*s ", key->len, key->header);
-	pr_info("\n\n");
+	if (!quiet) {
+		pr_info("%20s ", "Name");
+		list_for_each_entry(key, &lock_keys, list)
+			pr_info("%*s ", key->len, key->header);
+		pr_info("\n\n");
+	}
 
 	bad = total = printed = 0;
 	while ((st = pop_from_result())) {
@@ -1482,13 +1484,15 @@ static void print_contention_result(struct lock_contention *con)
 	struct lock_key *key;
 	int bad, total, printed;
 
-	list_for_each_entry(key, &lock_keys, list)
-		pr_info("%*s ", key->len, key->header);
+	if (!quiet) {
+		list_for_each_entry(key, &lock_keys, list)
+			pr_info("%*s ", key->len, key->header);
 
-	if (show_thread_stats)
-		pr_info("  %10s   %s\n\n", "pid", "comm");
-	else
-		pr_info("  %10s   %s\n\n", "type", "caller");
+		if (show_thread_stats)
+			pr_info("  %10s   %s\n\n", "pid", "comm");
+		else
+			pr_info("  %10s   %s\n\n", "type", "caller");
+	}
 
 	bad = total = printed = 0;
 	if (use_bpf)
@@ -1865,6 +1869,7 @@ int cmd_lock(int argc, const char **argv)
 		   "file", "vmlinux pathname"),
 	OPT_STRING(0, "kallsyms", &symbol_conf.kallsyms_name,
 		   "file", "kallsyms pathname"),
+	OPT_BOOLEAN('q', "quiet", &quiet, "Do not show any message"),
 	OPT_END()
 	};
 
-- 
2.37.3.998.g577e59143f-goog