#!/bin/bash
#
# Plugin to measure CPU frequency via cpufreq-info binary.
# This makes the plugin run on linux machines only.
# However the same goes for using sysfs directly.
#
# Contributed by Jo Schulze
#
# Config variables:
#
#
# Requires:
# cpufrequtils	http://www.kernel.org/pub/linux/utils/kernel/cpufreq/cpufrequtils.html
#
# @remarks
# jo20061130	using cpufreq-info should simplify the whole thing
# jo20061202	tested on AMD K8 X2, intel Core 2 Duo
#
# $Log$
#
# Magic markers - optional - used by installation scripts and
# munin-config:
#
#%# family=manual
#%# capabilities=autoconf

LC_ALL="C"

CINFOBIN="/usr/bin/cpufreq-info"

nCPU=$(grep -c "^processor" /proc/cpuinfo)

function getFreq ()
{
	i=0
	while ((i < nCPU)); do
		affc=`$CINFOBIN -a -c $i`
		internal=`echo $affc | tr ' ' '_'`
		cpus=( $affc )
		n=${#cpus[@]}

		freq=`$CINFOBIN -f -c $i`
		echo "freq_$internal.value $freq"

		((i += n))
	done
}

function getAvail ()
{
	i=0
	while ((i < nCPU)); do
		affc=`$CINFOBIN -a -c $i`
		internal=`echo $affc | tr ' ' '_'`
		label=`echo $affc | tr ' ' ','`
		cpus=( $affc )
		n=${#cpus[@]}

		echo "freq_$internal.label CPU $i (Core $label)"
		echo "freq_$internal.type GAUGE"
		echo "freq_$internal.info Hz"

		((i += n))
	done
}

function config ()
{
cat <<CONFIGTXT
graph_title CPU frequency(s)
graph_args --base 1000 -l 0
graph_vlabel Hz
graph_category system
graph_info This graph shows the CPU frequency(s).
CONFIGTXT
	getAvail
}

function autoconf ()
{
	if [ -x $CINFOBIN ]; then
		echo "yes"
	else
		echo "no"
	fi
	exit 0
}

case $1 in
"autoconf")
	autoconf
	;;
"config")
	config
	;;
*)
	getFreq
	;;
esac