#!/bin/bash

CPUPOWER_CONFIG="/etc/default/cpupower"

if [ -f "${CPUPOWER_CONFIG}" ]; then
  source "${CPUPOWER_CONFIG}"
else
  exit 0
fi

print_header() {
cat << HEADER

###############################################################################
# ${@}
###############################################################################
HEADER
}

# Set the CPU governor
if [ ! "${CPU_GOVERNOR}" == "" ]; then
  print_header "Setting CPU governor to ${CPU_GOVERNOR}"
  cpupower frequency-set --governor "${CPU_GOVERNOR}" &> /dev/null
  cpupower frequency-info
else
  echo "CPU governor is not set."
fi

# Set the Cstate by latency
if [ ! "${CPU_CSTATES_DISABLE_BY_LATENCY}" == "" ]; then
  print_header "Setting CPU CStates by latency to ${CPU_CSTATES_DISABLE_BY_LATENCY}"
  cpupower idle-set --disable-by-latency "${CPU_CSTATES_DISABLE_BY_LATENCY}" &> /dev/null
  cpupower idle-info
else
  echo "No CPU Cstates by latency configured."
fi