samples/pktgen: Add some helper functions

	err 4 "cannot perform sudo run of $0"

    fi

}

# Exact input device's NUMA node info

function get_iface_node()

{

    local node=$(</sys/class/net/$1/device/numa_node)

    if [[ $node == -1 ]]; then

        echo 0

    else

        echo $node

    fi

}

# Given an Dev/iface, get its queues' irq numbers

function get_iface_irqs()

{

	local IFACE=$1

	local queues="${IFACE}-.*TxRx"

	irqs=$(grep "$queues" /proc/interrupts | cut -f1 -d:)

	[ -z "$irqs" ] && irqs=$(grep $IFACE /proc/interrupts | cut -f1 -d:)

	[ -z "$irqs" ] && irqs=$(for i in `ls -Ux /sys/class/net/$IFACE/device/msi_irqs` ;\

	    do grep "$i:.*TxRx" /proc/interrupts | grep -v fdir | cut -f 1 -d : ;\

	    done)

	[ -z "$irqs" ] && err 3 "Could not find interrupts for $IFACE"

	echo $irqs

}

# Given a NUMA node, return cpu ids belonging to it.

function get_node_cpus()

{

	local node=$1

	local node_cpu_list

	local node_cpu_range_list=`cut -f1- -d, --output-delimiter=" " \

	                  /sys/devices/system/node/node$node/cpulist`

	for cpu_range in $node_cpu_range_list

	do

	    node_cpu_list="$node_cpu_list "`seq -s " " ${cpu_range//-/ }`

	done

	echo $node_cpu_list

}