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脚本如下：

setting up irq affinity according to /proc/interrupts

2008-11-25 Robert Olsson

2009-02-19 updated by Jesse Brandeburg

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> Dave Miller:

(To get consistent naming in /proc/interrups)

I would suggest that people use something like:

char buf[IFNAMSIZ+6];

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sprintf(buf, “%s-%s-%d”,

netdev->name,

(RX_INTERRUPT ? “rx” : “tx”),

queue->index);

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Assuming a device with two RX and TX queues.

This script will assign:

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eth0-rx-0 CPU0

eth0-rx-1 CPU1

eth0-tx-0 CPU0

eth0-tx-1 CPU1

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set_affinity() { MASK=$((1<<$VEC)) printf “%s mask=%X for /proc/irq/%d/smp_affinity\n” $DEV$MASK $IRQ printf “%X”$MASK > /proc/irq/$IRQ/smp_affinity #echo$DEV mask=$MASK for /proc/irq/$IRQ/smp_affinity #echo $MASK > /proc/irq/$IRQ/smp_affinity } if [ “$1” = “” ] ; then echo “Description:” echo ” This script attempts to bind each queue of a multi-queue NIC” echo ” to the same numbered core, ie tx0¦rx0 –> cpu0, tx1¦rx1 –> cpu1” echo “usage:” echo ”$0 eth0 [eth1 eth2 eth3]” fi

check for irqbalance running

IRQBALANCE_ON=ps ax ¦ grep -v grep ¦ grep -q irqbalance; echo $?

if [ “$IRQBALANCE_ON” == “0” ] ; then echo ” WARNING: irqbalance is running and will” echo ” likely override this script’s affinitization.” echo ” Please stop the irqbalance service and/or execute” echo ” ‘killall irqbalance’” fi #

Set up the desired devices.

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for DEV in $* do for DIR in rx tx TxRx do MAX=grep $DEV-$DIR /proc/interrupts ¦ wc -l if [ “$MAX” == “0” ] ; then MAX=egrep -i "$DEV:.*$DIR" /proc/interrupts ¦ wc -l fi if [ “$MAX” == “0” ] ; then echo no$DIR vectors found on $DEV continue #exit 1 fi for VEC in seq 0 1 $MAX do IRQ=cat /proc/interrupts ¦ grep -i $DEV-$DIR-$VEC"$" ¦ cut -d: -f1 ¦ sed "s/ //g" if [ -n “$IRQ” ]; then set_affinity else IRQ=cat /proc/interrupts ¦ egrep -i $DEV:v$VEC-$DIR"$" ¦ cut -d: -f1 ¦ sed "s/ //g" if [ -n “$IRQ” ]; then set_affinity fi fi done done done

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