[PATCH v3 3/6] perf/util/stat: Replace MAX_NR_CPUS with cpu__max_cpu

From: Kyle Meyer
Date: Mon Aug 19 2019 - 16:23:36 EST


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 zero_per_pkg and
check_per_pkg.

Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Cc: Ingo Molnar <mingo@xxxxxxxxxx>
Cc: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
Cc: Alexander Shishkin <alexander.shishkin@xxxxxxxxxxxxxxx>
Cc: Jiri Olsa <jolsa@xxxxxxxxxx>
Cc: Namhyung Kim <namhyung@xxxxxxxxxx>
Cc: linux-kernel@xxxxxxxxxxxxxxx
Cc: Russ Anderson <russ.anderson@xxxxxxx>
Signed-off-by: Kyle Meyer <kyle.meyer@xxxxxxx>
---
tools/perf/util/stat.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/tools/perf/util/stat.c b/tools/perf/util/stat.c
index e4e4e3bf8b2b..199008ce936d 100644
--- a/tools/perf/util/stat.c
+++ b/tools/perf/util/stat.c
@@ -208,7 +208,7 @@ void perf_evlist__reset_stats(struct evlist *evlist)
static void zero_per_pkg(struct evsel *counter)
{
if (counter->per_pkg_mask)
- memset(counter->per_pkg_mask, 0, MAX_NR_CPUS);
+ memset(counter->per_pkg_mask, 0, cpu__max_cpu());
}

static int check_per_pkg(struct evsel *counter,
@@ -227,7 +227,7 @@ static int check_per_pkg(struct evsel *counter,
return 0;

if (!mask) {
- mask = zalloc(MAX_NR_CPUS);
+ mask = zalloc(cpu__max_cpu());
if (!mask)
return -ENOMEM;

--
2.12.3