[PATCH 0/3] qemu-kvm: vhost net support

[Michael S. Tsirkin]

On Thu, Aug 20, 2009 at 04:49:47PM +0930, Rusty Russell wrote:
> On Thu, 13 Aug 2009 03:05:48 am Michael S. Tsirkin wrote:
> > On Mon, Aug 10, 2009 at 03:51:12PM -0500, Anthony Liguori wrote:
> > > Any rough idea on performance?  Better or worse than userspace?
> > 
> > Well, I definitely see some gain in latency.
> ...
> > Part of it might be that tx mitigation does not come into play with vhost. I
> > need to disable it in qemu and see.
> 
> A simple test I've found reasonably indicative when looking at base performance (before stuff like TSO get involved) is to do pings.  Throughput with "ping -s 1024 -l 120 -c 1000000 -f -q" and latency with "ping -c 1000000 -f -q".
> 
> (You may need to cut -l down if your ring is too small).
> 
> Cheers,
> Rusty.

OK, will try that.

-- 
MST