On 24/04/2015 10:12, Luke Gorrie wrote:
>
> I think this approach could be fruitful in bringing virtio-net to
> VM-to-VM networking use cases. Unless virtio-net is extended for this
> use case, I'm afraid DPDK and OpenDataPlane communities might steer
> clear of VIRTIO.
>
>
> Questions:
>
> - How fast is needed?
>
> - How fast is the vhost-user support that shipped in DPDK 2.0?
vhost-user is fast. The problem is not the speed, it's the desire of a
more peer-to-peer operation.
virtio by design has very distinct roles for driver and device, so for
VM2VM communication the virtio design requires two devices in the guest
and two drivers, comprising a "switch", in the host.
The switch could be using vhost-user indeed, but my understanding is
that in some cases this switch component is undesirable. However, my
understanding does not include _why_ it is undesirable. This is where
we need to gather more information from the DPDK folks.
Paolo
