virtio-nic multi-queue support - qemu-kvm

virtio-nic multi-queue support - qemu-kvm

1.Boot the guest with multiple queues(queues=4) nic.
e.g:...-device virtio-net-pci,netdev=dev1,mac=9a:e8:e9:ea:eb:ec,id=net1,vectors=9,mq=on
 -netdev tap,id=dev1,vhost=on,script=/etc/qemu-ifup-switch,queues=4

2.Using ethtool -L enable mq in guest
[Guest] # ethtool -L eth0 combined 4

3.Using ethtool -l eth0 can see the channel parameters of the interface like:
Pre-set maximums:
# ethtool -l eth0
Channel parameters for eth0:
Pre-set maximums:
RX:		0
TX:		0
Other:		0
Combined:	4 
Current hardware settings:
RX:		0

4.[Guest] # ping host_ip
TX:		0
Other:		0
Combined:	4  ( equal to queues in command line)