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perf lock contention: Use -M for --map-nr-entries

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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>
Acked-by: Ian Rogers <irogers@google.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Hao Luo <haoluo@google.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Juri Lelli <juri.lelli@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Song Liu <song@kernel.org>
Cc: bpf@vger.kernel.org
Link: https://lore.kernel.org/r/20230406210611.1622492-2-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Namhyung Kim 2023-04-06 14:06:06 -07:00 committed by Arnaldo Carvalho de Melo
parent d783ea8f62
commit 84b9192030
2 changed files with 2 additions and 1 deletions
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1
tools/perf/Documentation/perf-lock.txt
View file

@ -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).

2
tools/perf/builtin-lock.c
View file

@ -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, "