Re: [Qemu-devel] Is IOThread for virtio-net a good idea?

[Michael S. Tsirkin]

On Mon, Feb 11, 2019 at 04:40:44PM +0300, Anton Kuchin wrote:
> As far as I can see currently IOThread offloading is used only for block
> devices and all others are emulated by main thread.
> 
> I expect that network devices can also benefit from processing in separate
> thread but I couldn't find any recent work in this direction. I'm going to
> implement a PoC but I want to ask if you know any previous attempts and do
> you know why it can be a total waste of time. Are there fundamental
> obstacles that prevent network emulation handling in IOThread?

No but vhost-net is there. Unlike block where you gain lots of
functionality such as snapshots there seems to be little to
be gained by doing it in userspace.

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MST