diff mbox series

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

Message ID 20230406210611.1622492-3-namhyung@kernel.org
State New
Headers
Series perf lock contention: Improve performance if map is full (v1) |

Commit Message

Namhyung Kim April 6, 2023, 9:06 p.m. UTC 
  Users often want to change the map size, let's add a short option (-M)
for that.

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

Patch

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, "