Stefan Hajnoczi <stefa...@gmail.com> wrote on 01/03/2013 12:54:54 PM:
> On Thu, Feb 28, 2013 at 08:20:08PM +0200, Abel Gordon wrote: > > Stefan Hajnoczi <stefa...@gmail.com> wrote on 28/02/2013 04:43:04 PM: > > > I think extending and tuning the existing mechanisms is the way to go. > > > I don't see obvious advantages other than reducing context switches. > > > > Maybe it is worth checking... > > We did experiments using vhost-net and vhost-blk. We measured and compared > > the traditional model (kernel thread per VM/virtual device) to the > > shared-thread model with fine-grained I/O scheduling (single kernel thread > > used to serve multiple VMs). We noticed improvements up-to 2.5x > > in throughput and almost half the latency when running up-to 14 VMs. > > Can you post patches? We will publish the code soon but note the patches are for vhost kernel back-end and not for the qemu user-space back-end. > Also, I wonder if you have time to do a presentation/discussion session > so we can get the ball rolling and more people exposed to your approach. > There is a weekly QEMU Community Call which we can use as the forum. Sure. I'll send you a separate email to schedule the presentation/discussion.
