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#!/bin/bash
# pause-mythcommflag.sh v0.2 05/21/09
# Utility to automatically pause & unpause mythcommflag if CPU usage is above a certain level
# Free for any use.
# Installation:
# cp pause-mythcommflag.sh /usr/LH/bin
# chmod +x /usr/LH/bin/pause-mythcommflag.sh
# Usage: Executed from sv start pause-mythcommflag
# Threshold for when mythcommflag will be paused
CPUTHRESHOLD=75
# Second Threshold for when mythcommflag is already paused
PAUSEDCPUTHRESHOLD=45
# Log file to write (change to /dev/null for no log)
LOG=/var/log/mythtv/pause-mythcommflag.log
# Number of seconds to wait between checking for mythcommflag process
SLEEP=5
#sleep $SLEEP
touch $LOG
COMMFLAGSTATE=1
while true; do
PROCCOMMFLAG=`pidof mythcommflag`
if [ -n "${PROCCOMMFLAG}" ]
then
FRONTENDCPU=`top -bn1u mythtv | grep mythfrontend | awk '{ print $9 }'`
if [ $COMMFLAGSTATE -eq 1 ]
then
CPUTHRESHOLD1=$CPUTHRESHOLD
else
CPUTHRESHOLD1=$PAUSEDCPUTHRESHOLD
fi
if [ "$FRONTENDCPU" -ge "$CPUTHRESHOLD1" ]
then
# echo "$(date) FE CPU $FRONTENDCPU% is greater than $CPUTHRESHOLD1%, PAUSE Commflagging" >> $LOG
kill -s STOP $PROCCOMMFLAG
COMMFLAGSTATE=0
else
# echo "$(date) FE CPU $FRONTENDCPU% is less than $CPUTHRESHOLD1%, CONTINUE Commflagging" >> $LOG
kill -s CONT $PROCCOMMFLAG
COMMFLAGSTATE=1
fi
# else
# echo "No COMMFLAG Process Active" >> $LOG
fi
sleep $SLEEP
done
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