From mboxrd@z Thu Jan 1 00:00:00 1970 From: Arnaldo Carvalho de Melo Subject: [PATCH 07/47] perf header: Replace MAX_NR_CPUS with cpu__max_cpu() Date: Sun, 1 Sep 2019 09:22:46 -0300 Message-ID: <20190901122326.5793-8-acme@kernel.org> References: <20190901122326.5793-1-acme@kernel.org> Mime-Version: 1.0 Content-Transfer-Encoding: 8bit Return-path: In-Reply-To: <20190901122326.5793-1-acme@kernel.org> Sender: linux-kernel-owner@vger.kernel.org To: Ingo Molnar , Thomas Gleixner Cc: Jiri Olsa , Namhyung Kim , Clark Williams , linux-kernel@vger.kernel.org, linux-perf-users@vger.kernel.org, Kyle Meyer , Kyle Meyer , Jiri Olsa , Alexander Shishkin , Peter Zijlstra , Russ Anderson , Arnaldo Carvalho de Melo List-Id: linux-perf-users.vger.kernel.org From: Kyle Meyer 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 Reviewed-by: Jiri Olsa Cc: Alexander Shishkin Cc: Namhyung Kim Cc: Peter Zijlstra Cc: Russ Anderson Link: http://lore.kernel.org/lkml/20190827214352.94272-7-meyerk@stormcage.eag.rdlabs.hpecorp.net Signed-off-by: Arnaldo Carvalho de Melo --- tools/perf/util/header.c | 7 ++++--- 1 file 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; -- 2.21.0