gw2 bash renice

#!/bin/bash
OLDPID='a'

while true; do  #check if gw2 is running

        GW2PID=`ps -A | grep -m 1 'Gw2' | awk '{print $1}'`
        WINESVRPID=`ps -A | grep -m 1 'wineserver' | awk '{print $1}'`
        WINEDEVPID=`ps -A | grep -m 1 'winedevice.exe' | awk '{print $1}'`

        if [ ! $GW2PID ]; then
                echo 'Guild Wars 2 is not running'
                echo 'Processor is downgrading'
        elif [ $OLDPID != $GW2PID ]; then
                        echo 'Guild Wars 2 is getting tuned'
                        OLDPID=$GW2PID
                        renice -n -20 $GW2PID
                                renice -n -20 $WINESVRPID
                                renice -n -20 $WINEDEVPID

                                taskset -cp 0-5 $WINESVRPID     #set to use core 0 to 6
                        taskset -cp 0-5 $WINEDEVPID
                        taskset -cp 0-5 $GW2PID
                        echo 'Processor is optimizing'
                        exit    #ends the script
                else
                        echo 'Guild Wars 2 is already tuned.'
        fi
        sleep 15
done