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| author | Namhyung Kim <namhyung@kernel.org> | 2023-04-07 00:06:07 +0300 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2023-04-07 03:52:27 +0300 |
| commit | 2d8d016527928ad65ad1fe11c9943d8b81f05d18 (patch) | |
| tree | 7301cd4478d6ef6f04e442a69deacdcdf223466a /tools/perf/Documentation | |
| parent | 84b91920304f5e640ac922cb721f5c70617a83e8 (diff) | |
| download | linux-2d8d016527928ad65ad1fe11c9943d8b81f05d18.tar.xz | |
perf lock contention: Update default map size to 16384
The BPF hash map will align the map size to a power of 2. So 10k would
be 16k anyway. Let's have the actual size to avoid confusions.
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>
Diffstat (limited to 'tools/perf/Documentation')
| -rw-r--r-- | tools/perf/Documentation/perf-lock.txt | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/tools/perf/Documentation/perf-lock.txt b/tools/perf/Documentation/perf-lock.txt index b5e5d088d51c..6e5ba3cd2b72 100644 --- a/tools/perf/Documentation/perf-lock.txt +++ b/tools/perf/Documentation/perf-lock.txt @@ -157,7 +157,8 @@ CONTENTION OPTIONS -M:: --map-nr-entries=<value>:: - Maximum number of BPF map entries (default: 10240). + Maximum number of BPF map entries (default: 16384). + This will be aligned to a power of 2. --max-stack=<value>:: Maximum stack depth when collecting lock contention (default: 8). |