cpu frequency tuning

cpufreq.sh

#!/usr/bin/env bash

cpus=$(cat /proc/cpuinfo | grep processor | wc -l)
governor="powersave"

i=0
while [[ $i -ne $cpus ]]; do
    echo "${governor}" >/sys/devices/system/cpu/cpu$i/cpufreq/scaling_governor

    # get max frequency
    max_frequency=$(cat /sys/devices/system/cpu/cpu$i/cpufreq/cpuinfo_max_freq)

    # calulate max_frequency
    selected_max_frequency=$(($max_frequency / 100 * 85))
    echo "cpu=$i | max_frequency=${max_frequency} | selected_max_frequency=${selected_max_frequency}"

    echo "${selected_max_frequency}" >/sys/devices/system/cpu/cpu$i/cpufreq/scaling_max_freq

    # calculate min_frequency
    min_frequency=$(cat /sys/devices/system/cpu/cpu$i/cpufreq/cpuinfo_min_freq)

    selected_min_frequency=$(($min_frequency / 100 * 150))
    echo "cpu=$i | min_frequency=${min_frequency} | selected_min_frequency=${selected_min_frequency}"

    echo "${selected_min_frequency}" >/sys/devices/system/cpu/cpu$i/cpufreq/scaling_min_freq
    i=$(expr $i + 1)

    echo -e "\n"
done