Linux的cpu测试---构造消耗cpu的shell脚本

思路：构造是循环可以消耗CPU的资源。

用法：该脚本很简单，使用之前使用命令cat /proc/cpuinfo | grep "processor"|wc -l 先查询下cpu的个数，需要构造消耗8颗cpu的资源运行脚本sh cpu_usage.sh consume 8，此时运行top命令查看cpu的使用率。如果要释放cpu资源，运行sh cpu_usage.sh release即可释放cpu资源。

 

#!/bin/bash
# Destription: test cpu usage 
# Example    : sh cpu_usage.sh consume 8 | sh cpu_usage.sh release

FILE_NAME=`basename $0`
cpunum=$2
pid_array=()
function usage()
{
echo "Usage:$FILE_NAME consume cpu_number|release -----the value of cpu_number is an integer,such as 1,2,3"
echo "Example: $FILE_NAME consume 12"
echo "         $FILE_NAME release"
}

function endless_loop()
{
echo -ne "i=0;
while true
do
    i=i+100;
    i=100
done" | /bin/bash &
}


function consume()
{
for i in `seq $1`
do
    endless_loop
    pid_array[$i]=$!
done
echo "consume cpu resources process ids are: ${pid_array[*]}"
}

function release()
{
for pid in $(ps -ef |grep /bin/bash |grep -v grep |awk '{print $2}' |xargs)
do
    kill -9 $pid
done
}

function main()
{
case "$1" in
    consume) consume $cpunum;;
    release) release;;
          *) usage;exit 1;;
esac
}

main $*

运行结果：

说明：

#消耗cpu之后会返回消耗每个cpu资源对应的死循环进程号(如文章中运行结果返回5593 5595)，如果需要一点一点释放cpu资源，就自己使用kill -9 命令杀掉对应的进程号即可

[root@localhost ~]# sh cpu_usage.sh consume 2     
consume cpu resources process ids are: 5593 5595
 

#使用sh cpu_usage.sh release是会释放所有构造的cpu占用进程