Hi, I have a Dell PowerEdge 730 server with Ubuntu 16.04 and KVM running on it. QEMU version used is 2.5.0. I have a guest OS with linux running on it which does packet processing and forwarding. I have 4 10G interfaces connected to the Dell server and all of them are connected to the guest via macvtap. For improving the throughput of the guest I am using multiple queues on the vhost driver by defining “<driver name='vhost' queues='8'/>” in the guest xml file. By using interrupt affinity for the queue interrupts I am able to use multiple VCPUs on the guest. However I am seeing that on the host the macvtap interface is created with only 1 Rx/Tx queue as shown below. lab5@lab5-PowerEdge-R730:~$ ls /sys/class/net/macvtap0/queues/ rx-0 tx-0 Also only 1 tap device is opened per macvtap interface. For lower input rate of around 10Gbps, there are not many issues. However when the input rate starts increasing, I don’t see the guest getting the packets at a very high rate. Can anyone tell me how to create multiple queues for macvtap interface in QEMU?
Thanks, Chandrasekhar
