CPU governor selection

cpu.sh

#!/usr/bin/env bash
set -eo pipefail

GOVERNORS=$(cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_available_governors)

echo "Available governors:"
echo $GOVERNORS

echo ""
echo "Current governor:"
cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor

# Options: powersave, performance
CPU=$1

if [[ " $GOVERNORS " =~ .*\ $CPU\ .* ]]; then
    echo ""
    echo "Selecting '$CPU' CPU governor."
    echo $CPU | sudo tee /sys/devices/system/cpu/cpu*/cpufreq/scaling_governor
fi