Change Scaling Mode of CPUs

Table of contents

• Script

---

Script

#!/bin/sh
# Made by Hyeonseong Jo

i=0
nproc=`nproc`

if [ $# -eq 0 ]
then
        echo "==================== HOW TO USE ===================="
        echo "$0 [0:check status,1:performance,2:powersave]"
        echo "===================================================="
else
        # check status
        if [ $1 -eq 0 ]
        then
                while [ $i -lt $(nproc) ]
                do
                        sudo echo "CPU$i:" `cat /sys/devices/system/cpu/cpu$i/cpufreq/scaling_governor`
                        i=`expr $i + 1`
                done
        # performance mode
        elif [ $1 -eq 1 ]
        then
                while [ $i -lt $(nproc) ]
                do
                        echo performance | sudo tee /sys/devices/system/cpu/cpu$i/cpufreq/scaling_governor > /dev/null
                        sudo echo "CPU$i:" `cat /sys/devices/system/cpu/cpu$i/cpufreq/scaling_governor`
                        i=`expr $i + 1`
                done
        # powersave mode
        elif [ $1 -eq 2 ]
        then
                while [ $i -lt $(nproc) ]
                do
                        echo powersave | sudo tee /sys/devices/system/cpu/cpu$i/cpufreq/scaling_governor > /dev/null
                        sudo echo "CPU$i:" `cat /sys/devices/system/cpu/cpu$i/cpufreq/scaling_governor`
                        i=`expr $i + 1`
                done

        # input error
        else
                echo "Input error!"
        fi
fi