scaling_governor

powersave

echo powersave > /tmp/scaling_governor
/etc/cron.hourly/scaling_governor

scaling_governor

#!/usr/bin/env bash

#
# Auto set the scaling_governor
#
# /etc/cron.hourly/scaling_governor
#
# cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_available_governors
# cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor

PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin

hour=$(TZ=Asia/Shanghai date +"%H")
mode=powersave

if (( "$hour" >= 20 )); then
  mode=powersave
elif (( "$hour" <= 8 )); then
  mode=powersave
else
  mode=ondemand
fi

[ -f /tmp/scaling_governor ] && mode=$(cat /tmp/scaling_governor)

if cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor | grep -q $mode; then
  true
else
  echo "$mode" | tee /sys/devices/system/cpu/cpu*/cpufreq/scaling_governor
fi

logger -t scaling_governor "set scaling_governor to $mode"

exit 0