On 10/03/2010 03:51 PM, Michael S. Tsirkin wrote:
On Sun, Oct 03, 2010 at 01:01:59PM +0200, Avi Kivity wrote: > > > >Guest to Host TCP_STREAM throughput(Mb/sec) > >------------------------------------------- > >Msg Size vhost-net virtio-net virtio-net/ioeventfd > >65536 12755 6430 7590 > >16384 8499 3084 5764 > > 4096 4723 1578 3659 > > 1024 1827 981 2060 > > Even more impressive (expected since the copying, which isn't > present for block, is now shunted off into an iothread). > > On the last test you even exceeded vhost-net. Any theories how/why? > > Again, efficiency numbers would be interesting. > > >Host to Guest TCP_STREAM throughput(Mb/sec) > >------------------------------------------- > >Msg Size vhost-net virtio-net virtio-net/ioeventfd > >65536 11156 5790 5853 > >16384 10787 5575 5691 > > 4096 10452 5556 4277 > > 1024 4437 3671 5277 > > Here you exceed vhost-net, too. This is with small packets- I suspect this is the extra per interrupt overhead that eventfd has.
This is using eventfd as well. -- error compiling committee.c: too many arguments to function -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
