Hi,

Not a direct answer – but I think something to consider:

-I am not sure what virtio is there ‘out of box’, but I imagine that you need to check what is latest virtio-win package

containing NetKVM driver.

(https://fedorapeople.org/groups/virt/virtio-win/direct-downloads/archive-virtio/ ?)

-I would imagine that main driver of higher virtio-net performance is support and use of multiqueue.

I don’t know about Windows 2019 , maybe it is matter of configuration.

Check out https://access.redhat.com/solutions/6638561 and https://github.com/virtio-win/kvm-guest-drivers-windows/issues/237

BR,

Konstantin

From: Gianluca Cecchi <gianluca.cecchi@gmail.com>
Date: Wednesday, 30 November 2022 at 10:40
To: users <users@ovirt.org>
Subject: [ovirt-users] Max network performance on w2019 guest

One customer sees 2,5gbs on 10gbs adapters for w2019 VM with virtio using iperf3.

Instead with Oracle linux 8 VMS of the same infra sees 9gbs.

What is the expected maximum on windows with virtio based on experience?

Thanks

Gianluca