On Wed, 2011-03-09 at 18:32 +0200, Michael S. Tsirkin wrote: > I think your issues are with TX overrun. > Besides delaying IRQ on TX, I don't have many ideas. > > The one interesting thing is that you see better speed > if you drop packets. netdev crowd says this should not happen, > so could be an indicator of a problem somewhere. Yes, I am looking at why guest didn't see see used_buffers on time from vhost send TX completion I am trying to collect some data on vhost. I also wonder whether it's a scheduler issue. Thanks Shirley -- 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