monbycpu.sh

Linux Shell 编程

#!/bin/bash
# 监测的网络接口
ETH=eth1
# 监测的时间间隔，秒计
INTERVAL=10
# 进程中各线程cpu占有率之和的最小值
DIFFERENCE=40
# 监测和进程名
PRGNAME=tcpkill*
#纪录cpu占有率小于规定值的次数的阀值，超过次阀值，重起
SUMERROR=10
#纪录cpu占有率小于规定值的次数
Record=0
#为了在比较时取整，Now和DIFFERENCE都需乘上一个系数，这里用1000
DIFFERENCE=$[DIFFERENCE*1000]
while true;do
Now=0
Now=`ps aux|grep tcpkill|awk '{sum=sum+$3}END{sum=sum*1000;print sum}'`

#echo "cpu of $PRGNAME is $Now"
if [ $Now -lt $DIFFERENCE ]; then
	Record=$[Record+1]
	#echo "record is $Record"
fi
#	echo $Record
#	echo $SUMERROR
if [ $Record -ge $SUMERROR ];then
	#echo "kill tcpwatch"
	/usr/bin/killall -9 $PRGNAME 
	sleep 10
	./$PRGNAME -d $ETH
	Record=0
fi    

sleep $INTERVAL
done