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| author | Kyle Meyer <meyerk@hpe.com> | 2019-08-27 16:43:51 -0500 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2019-08-29 17:38:32 -0300 |
| commit | dc84187f32a3e8eb86bd97f3b10494e1f1fe5e7f (patch) | |
| tree | 5981576e6028ffc08eafcdb1d5b61d57a20c639e /tools/perf/util/header.c | |
| parent | 8c7274691f0de5fb56f3b9fe9208ce7e515a2d2c (diff) | |
| download | lwn-dc84187f32a3e8eb86bd97f3b10494e1f1fe5e7f.tar.gz lwn-dc84187f32a3e8eb86bd97f3b10494e1f1fe5e7f.zip | |
perf header: Replace MAX_NR_CPUS with cpu__max_cpu()
The function cpu__max_cpu() returns the possible number of CPUs as
defined in the sysfs and can be used as an alternative for MAX_NR_CPUS
in write_cache.
MAX_CACHES is replaced by cpu__max_cpu() * MAX_CACHE_LVL.
Signed-off-by: Kyle Meyer <kyle.meyer@hpe.com>
Reviewed-by: Jiri Olsa <jolsa@redhat.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Russ Anderson <russ.anderson@hpe.com>
Link: http://lore.kernel.org/lkml/20190827214352.94272-7-meyerk@stormcage.eag.rdlabs.hpecorp.net
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/util/header.c')
| -rw-r--r-- | tools/perf/util/header.c | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/tools/perf/util/header.c b/tools/perf/util/header.c index 0a842d9eff22..dd2bb0861ab1 100644 --- a/tools/perf/util/header.c +++ b/tools/perf/util/header.c @@ -1122,16 +1122,17 @@ static int build_caches(struct cpu_cache_level caches[], u32 size, u32 *cntp) return 0; } -#define MAX_CACHES (MAX_NR_CPUS * 4) +#define MAX_CACHE_LVL 4 static int write_cache(struct feat_fd *ff, struct evlist *evlist __maybe_unused) { - struct cpu_cache_level caches[MAX_CACHES]; + u32 max_caches = cpu__max_cpu() * MAX_CACHE_LVL; + struct cpu_cache_level caches[max_caches]; u32 cnt = 0, i, version = 1; int ret; - ret = build_caches(caches, MAX_CACHES, &cnt); + ret = build_caches(caches, max_caches, &cnt); if (ret) goto out; |