irqnum=$(cat /proc/interrupts | grep $1 | tr ":" "\n" | head -1 | tr -d ' ' )
cores=$(grep -c 'cpu[0-9]' /proc/stat)
NewMask=$(echo $cores 1 - 2 r ^ p | dc)
echo Cores: $cores
echo Old CPU Mask: $(cat /proc/irq/$irqnum/smp_affinity)
echo $NewMask > /proc/irq/$irqnum/smp_affinity
CPUMask=$(cat /proc/irq/$irqnum/smp_affinity)
echo "Set device "$1" IRQ" $irqnum "CPU mask to" $CPUMask