Initial version

plugins/other/cpufreq-avg

@@ -0,0 +1,144 @@
+#!/bin/sh
+#
+# Plugin to measure average CPU frequency for each CPU/core.
+#
+# Contributed by Mark Edwards
+#
+# Usage: Place in /etc/munin/plugins (or link it there  using ln -s)
+#
+# Parameters understood:
+#
+#       config   (required)
+#       autoconf (optional - used by munin-config)
+#
+# $Log$
+#
+# Revision 0.2  2010/01/04 16:37:00  medwards
+# Minor bugfixes in config section
+#
+# Revision 0.1  2010/01/04 16:13:00  medwards
+# First version
+#
+#
+#
+# Magic markers - optional - used by installation scripts and
+# munin-config:
+#
+#%# family=auto
+#%# capabilities=autoconf
+
+if [ "$1" = "autoconf" ]; then
+		if [ -r /sys/devices/system/cpu/cpu0/cpufreq/stats/time_in_state ]; then
+			echo yes
+			exit 0
+		else
+			echo no
+			exit 1
+		fi
+fi
+
+cpu_count=`grep -c "^processor" /proc/cpuinfo`
+
+if [ "$1" = "config" ]; then
+
+		echo 'graph_title Average CPU Frequency'
+		up_lim=`cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_max_freq`
+		low_lim=`cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_min_freq`
+		up_lim=`expr $up_lim \* 1000` # Convert to Hz
+		low_lim=`expr $low_lim \* 1000` # Convert to Hz
+		echo "graph_args -u $up_lim -l $low_lim -r --base 1000"
+		echo 'graph_vlabel Hz'
+		echo 'graph_category system'
+		cpu=0
+		while [ $cpu -lt $cpu_count ]
+		do
+			echo "cpu_$cpu.label CPU $cpu"
+			echo "cpu_$cpu.type GAUGE"
+			echo "cpu_$cpu.info Hz"
+			cpu=`expr $cpu + 1`
+		done
+		exit 0
+fi
+
+# Run measurements
+cpu=0
+while [ $cpu -lt $cpu_count ]
+do
+
+	time_in_state=`cat /sys/devices/system/cpu/cpu$cpu/cpufreq/stats/time_in_state`
+
+	# Check/create statefile(s)
+	statefile="/var/lib/munin/plugin-state/cpufreq-avg_cpu$cpu.state"
+	if [ ! -r "$statefile" ]
+	then
+		echo "$time_in_state" > $statefile
+		if [ "$?" -ne "0" ]
+		then
+			exit ${1}
+		else
+			cpu=`expr $cpu + 1`
+			continue
+		fi
+	fi
+	state=`cat $statefile`
+	
+	# Calculated total time since last state
+	total_time=0
+	total_time=$(
+		echo "$time_in_state" | { 
+			i=0
+			while read line
+			do
+				this_freq=`echo $line | awk '{ print $1; }'`
+				this_time=`echo $line | awk '{ print $2; }'`
+				this_time_state=`echo "$state" | grep $this_freq | awk '{ print $2; }'`
+				if [ $this_time -ge $this_time_state ] # Only measure if state is valid
+				then
+					time_diff=`expr $this_time - $this_time_state` # Calculate time since last state
+					total_time=`expr $total_time + $time_diff`
+				fi
+				i=`expr $i + 1`
+			done
+			echo $total_time
+		}
+	)
+	
+	# Measure average CPU frequency if total time calculation was successful
+
+	frequency=0
+	frequency=$(
+		echo "$time_in_state" | {
+			i=0
+			while read line
+			do
+				this_freq=`echo $line | awk '{ print $1; }'`
+				this_time=`echo $line | awk '{ print $2; }'`
+				this_time_state=`echo "$state" | grep $this_freq | awk '{ print $2; }'`
+				this_freq=`expr $this_freq \* 1000` # Convert to Hz
+				this_time=`expr $this_time - $this_time_state` # Calculate time since last state
+				if [ $total_time -gt 0 ]
+				then
+					calc=`echo "($this_time / $total_time) * $this_freq" | bc -l`
+					frequency=`echo "$frequency + $calc" | bc -l`
+				fi
+				i=`expr $i + 1`
+			done
+			echo $frequency
+		}
+	)
+
+	# Round result to an integer and return it
+	frequency=`echo "scale=0 ; ($frequency+0.5)/1" | bc -l`
+	if [ $frequency -gt 0 ]
+	then
+		echo "cpu_$cpu.value $frequency"
+	fi
+	
+	# Update statefile
+	echo "$time_in_state" > $statefile
+	
+	cpu=`expr $cpu + 1`
+
+done
+
+exit 0