linux获取cpu利用率shell脚本

最新推荐文章于 2025-06-10 20:45:43 发布

stormbjm

最新推荐文章于 2025-06-10 20:45:43 发布

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本文介绍了一个用于监控Linux系统中CPU使用率的bash脚本。该脚本能够收集各CPU核心的使用情况，并将数据记录到CSV文件中，便于后续的数据分析和图表绘制。

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github地址：https://raw.github.com/aspirer/scripts/master/cpu_rate.sh

#!/bin/bash
interval=3
cpu_num=`cat /proc/stat | grep cpu[0-9] -c`

start_idle=()
start_total=()
cpu_rate=()

cpu_rate_file=./`hostname`_cpu_rate.csv
if [ -f ${cpu_rate_file} ]; then
    mv ${cpu_rate_file} ${cpu_rate_file}.`date +%m_%d-%H_%M_%S`.bak
fi
for((i=0;i<${cpu_num};i++))
{
    echo -n "cpu$i," >> ${cpu_rate_file}
}
echo -n "cpu" >> ${cpu_rate_file}
echo "" >> ${cpu_rate_file}

while(true)
do
    for((i=0;i<${cpu_num};i++))
    {
        start=$(cat /proc/stat | grep "cpu$i" | awk '{print $2" "$3" "$4" "$5" "$6" "$7" "$8}')
        start_idle[$i]=$(echo ${start} | awk '{print $4}')
        start_total[$i]=$(echo ${start} | awk '{printf "%.f",$1+$2+$3+$4+$5+$6+$7}')
    }
    start=$(cat /proc/stat | grep "cpu " | awk '{print $2" "$3" "$4" "$5" "$6" "$7" "$8}')
    start_idle[${cpu_num}]=$(echo ${start} | awk '{print $4}')
    start_total[${cpu_num}]=$(echo ${start} | awk '{printf "%.f",$1+$2+$3+$4+$5+$6+$7}')
    sleep ${interval}
    for((i=0;i<${cpu_num};i++))
    {
        end=$(cat /proc/stat | grep "cpu$i" | awk '{print $2" "$3" "$4" "$5" "$6" "$7" "$8}')
        end_idle=$(echo ${end} | awk '{print $4}')
        end_total=$(echo ${end} | awk '{printf "%.f",$1+$2+$3+$4+$5+$6+$7}')
        idle=`expr ${end_idle} - ${start_idle[$i]}`
        total=`expr ${end_total} - ${start_total[$i]}`
        idle_normal=`expr ${idle} \* 100`
        cpu_usage=`expr ${idle_normal} / ${total}`
        cpu_rate[$i]=`expr 100 - ${cpu_usage}`
        echo "The CPU$i Rate : ${cpu_rate[$i]}%"
        echo -n "${cpu_rate[$i]}," >> ${cpu_rate_file}
    }
    end=$(cat /proc/stat | grep "cpu " | awk '{print $2" "$3" "$4" "$5" "$6" "$7" "$8}')
    end_idle=$(echo ${end} | awk '{print $4}')
    end_total=$(echo ${end} | awk '{printf "%.f",$1+$2+$3+$4+$5+$6+$7}')
    idle=`expr ${end_idle} - ${start_idle[$i]}`
    total=`expr ${end_total} - ${start_total[$i]}`
    idle_normal=`expr ${idle} \* 100`
    cpu_usage=`expr ${idle_normal} / ${total}`
    cpu_rate[${cpu_num}]=`expr 100 - ${cpu_usage}`
    echo "The average CPU Rate : ${cpu_rate[${cpu_num}]}%"
    echo -n "${cpu_rate[${cpu_num}]}" >> ${cpu_rate_file}
    echo "------------------"
    echo "" >> ${cpu_rate_file}
done

输出是逗号分隔符文件（.csv），可以用excel直接打开，方便数据分析和绘图等。

cpu0,cpu1,cpu2,cpu3,cpu4,cpu5,cpu6,cpu7,cpu8,cpu9,cpu10,cpu11,cpu12,cpu13,cpu14,cpu15,cpu16,cpu17,cpu18,cpu19,cpu20,cpu21,cpu22,cpu23,cpu_avg

4,1,2,13,11,5,2,4,1,1,3,4,7,5,12,16,3,1,4,5,1,2,2,1,5

4,1,2,13,12,1,8,4,4,5,15,7,2,5,3,1,1,1,1,4,3,2,1,0,4

4,2,1,15,11,2,5,6,4,6,7,4,3,4,2,4,1,8,1,3,3,2,1,1,4

6,3,3,15,11,3,5,8,6,4,11,4,8,18,7,4,1,1,5,11,4,6,4,5,7

22,1,2,14,10,2,5,6,6,6,7,8,1,5,10,8,1,2,1,3,3,1,1,1,5

cpu0	cpu1	cpu2	cpu3	cpu4	cpu5	cpu6	cpu7	cpu8	cpu9	cpu10	cpu11	cpu12	cpu13	cpu14	cpu15	cpu16	cpu17	cpu18	cpu19	cpu20	cpu21	cpu22	cpu23	cpu_avg
4	1	2	13	11	5	2	4	1	1	3	4	7	5	12	16	3	1	4	5	1	2	2	1	5
4	1	2	13	12	1	8	4	4	5	15	7	2	5	3	1	1	1	1	4	3	2	1	0	4
4	2	1	15	11	2	5	6	4	6	7	4	3	4	2	4	1	8	1	3	3	2	1	1	4
6	3	3	15	11	3	5	8	6	4	11	4	8	18	7	4	1	1	5	11	4	6	4	5	7
22	1	2	14	10	2	5	6	6	6	7	8	1	5	10	8	1	2	1	3	3	1	1	1	5