From: Dongwoo Lee <dwoo08.lee@samsung.com>
Date: Wed, 23 Feb 2022 07:58:04 +0000 (+0900)
Subject: util: kernel: Read stationary values once
X-Git-Tag: submit/tizen/20220302.025412~10
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=085b6e558e1b92f3da18c32bc04d10e9aa7f8214;p=platform%2Fcore%2Fsystem%2Fpass.git

util: kernel: Read stationary values once

Since statinary kernel sysfs or procfs nodes is not have to be
read every time, it lets them being read once.

Change-Id: Icee5f825694867ecb84847fd46830274fe8219d3
Signed-off-by: Dongwoo Lee <dwoo08.lee@samsung.com>
---

diff --git a/src/util/kernel.c b/src/util/kernel.c
index 490432f..41c1637 100644
--- a/src/util/kernel.c
+++ b/src/util/kernel.c
@@ -105,7 +105,12 @@ int kernel_get_online_cpu_num(void)
 
 int kernel_get_possible_cpu_num(void)
 {
-	return __get_cpu_num("/sys/devices/system/cpu/possible");
+	static int possible = 0;
+
+	if (!possible)
+		possible = __get_cpu_num("/sys/devices/system/cpu/possible");
+
+	return possible;
 }
 
 int kernel_get_total_cpu_stat(struct cpu_stat *total)