On Tue, 1 Aug 2023 10:03:44 +0800 Xuan Zhuo wrote:

quoted

Virtio is either a SW
construct or offloaded to very capable HW, so either way cost of
creating an extra instance for DPDK or whatever else is very low.  

The extra instance is virtio-net?

I think there is a gap. So let me give you a brief introduction of our case.

Firstly, we donot use dpdk. We use the AF_XDP, because of that the AF_XDP is
more simpler and easy to deploy for the nginx.

We use the AF_XDP to speedup the UDP of the quic. By the library, the APP just
needs some simple change.

On the AliYun, the net driver is virtio-net. So we want the virtio-net support
the AF_XDP.

I guess what you mean is that we can speed up through the cooperation of devices
and drivers, but our machines are public clouds, and we cannot change the
back-end devices of virtio under normal circumstances.

Here I do not know the different of the real hw and the virtio-net.

You have this working and benchmarked or this is just and idea?

What about io_uring zero copy w/ pre-registered buffers.
You'll get csum offload, GSO, all the normal perf features.