linux-kernel - [PATCH 2/7] perf lock contention: Use -M for --map-nr-entries

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Message-Id: <20230406210611.1622492-3-namhyung@kernel.org>
Date:   Thu,  6 Apr 2023 14:06:06 -0700
From:   Namhyung Kim <namhyung@...nel.org>
To:     Arnaldo Carvalho de Melo <acme@...nel.org>,
        Jiri Olsa <jolsa@...nel.org>
Cc:     Ian Rogers <irogers@...gle.com>,
        Adrian Hunter <adrian.hunter@...el.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...nel.org>,
        LKML <linux-kernel@...r.kernel.org>,
        linux-perf-users@...r.kernel.org, Song Liu <song@...nel.org>,
        Hao Luo <haoluo@...gle.com>, bpf@...r.kernel.org,
        Juri Lelli <juri.lelli@...hat.com>
Subject: [PATCH 2/7] perf lock contention: Use -M for --map-nr-entries

Users often want to change the map size, let's add a short option (-M)
for that.

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

diff --git a/tools/perf/Documentation/perf-lock.txt b/tools/perf/Documentation/perf-lock.txt
index 37aae194a2a1..b5e5d088d51c 100644
--- a/tools/perf/Documentation/perf-lock.txt
+++ b/tools/perf/Documentation/perf-lock.txt
@@ -155,6 +155,7 @@ CONTENTION OPTIONS
 --tid=<value>::
         Record events on existing thread ID (comma separated list).
 
+-M::
 --map-nr-entries=<value>::
 	Maximum number of BPF map entries (default: 10240).
 
diff --git a/tools/perf/builtin-lock.c b/tools/perf/builtin-lock.c
index 695ce6bd64f7..ef56bf90058d 100644
--- a/tools/perf/builtin-lock.c
+++ b/tools/perf/builtin-lock.c
@@ -2294,7 +2294,7 @@ int cmd_lock(int argc, const char **argv)
 		   "Trace on existing process id"),
 	OPT_STRING(0, "tid", &target.tid, "tid",
 		   "Trace on existing thread id (exclusive to --pid)"),
-	OPT_CALLBACK(0, "map-nr-entries", &bpf_map_entries, "num",
+	OPT_CALLBACK('M', "map-nr-entries", &bpf_map_entries, "num",
 		     "Max number of BPF map entries", parse_map_entry),
 	OPT_CALLBACK(0, "max-stack", &max_stack_depth, "num",
 		     "Set the maximum stack depth when collecting lopck contention, "
-- 
2.40.0.577.gac1e443424-goog