自动控制多核cpu使用率的脚本，cpulimit

• 利用cpulimit限制cpu的使用情况需要手动，很是麻烦。写一个shell脚本以root权限运行可以自动控制选定用户的程序。如果cpu占用超过了阈值400，脚本自动压制到200.
  nohup bash Auto_watch_and_limit_cpu.sh &

#!/bin/bash
arr=(
 "user1"
 "user2"
 "user3"
)

# set limit cpu usage
cpul=400
cpus=200

# show basic info
echo " "
echo " We will limit the users below when the cpu usage of their pid is over the threshold "$cpul"."
for value in ${arr[@]}
do
    echo "     "$value
done

# check and cpulimit
echo "---------------------------------------------------------"

while :
do
top -bn1 | awk '{if(NR>=8 && $9>'${cpul}')print ($1,$2,$9)}' | while read pid user cpu
do
    echo '     pid='$pid,'user='$user,'cpu='$cpu
    if [[ "${arr[*]}"  =~ ${user} ]] ; then
        echo "          cpulimit -p "${pid}" -l "$cpus
        cpulimit -p ${pid} -l $cpus
    fi
done
echo "---------------------------------------------------------"
sleep 1
done

• 程序运行截图

  
  
  1.png