On Thu, 15 Aug 2024 17:50:19 +0200
Laurent Vivier <lvivier@redhat.com> wrote:

> This series of patches adds vhost-user support to passt
> and then allows passt to connect to QEMU network backend using
> virtqueue rather than a socket.
> 
> With QEMU, rather than using to connect:
> 
>   -netdev stream,id=s,server=off,addr.type=unix,addr.path=/tmp/passt_1.socket
> 
> we will use:
> 
>   -chardev socket,id=chr0,path=/tmp/passt_1.socket
>   -netdev vhost-user,id=netdev0,chardev=chr0
>   -device virtio-net,netdev=netdev0
>   -object memory-backend-memfd,id=memfd0,share=on,size=$RAMSIZE
>   -numa node,memdev=memfd0
> 
> The memory backend is needed to share data between passt and QEMU.
> 
> Performance comparison between "-netdev stream" and "-netdev vhost-user":

By the way, I attached a quick patch adding vhost-user-based tests to
the usual throughput and latency tests.

UDP doesn't work (I didn't look into that at all), TCP does.

-- 
Stefano