diff --git a/source/tools/detect/sched/sysmonitor/sysmonitor.sh b/source/tools/detect/sched/sysmonitor/sysmonitor.sh
index 19084ae734ac1fbbbd895d7d0ed5652c56db0c3d..77b217c3f43ce3a2555611a72ebf6331d540e77e 100755
--- a/source/tools/detect/sched/sysmonitor/sysmonitor.sh
+++ b/source/tools/detect/sched/sysmonitor/sysmonitor.sh
@@ -26,7 +26,7 @@ monitor() {
 	while :;
 	do
 		sys_util=`mpstat $cpuarg 1 1 | awk '{print $5}' | awk 'END{print $1}'`
-		if [ `expr $sys_util \> $maxsys` -eq 0 ]; then
+		if(($(echo "$sys_util>$maxsys" | bc -l))); then
 			perf record -a -g -o $datafile sleep $lasttime;
 			exit
 		fi