On Tue, 2012-05-22 at 14:14 +0300, Michael S. Tsirkin wrote: > > The baseline is the laptop without kvm talking to the server. The > > TCP_STREAM test results are: > > It's not a good test. The thing most affecting throughput results is > how > much CPU does you guest get. So as a minumum you need to measure CPU > utilization on the host and divide by that.
The simple fact that we don't reach the baseline while in qemu seems to be a reasonably good indication that we tend to be CPU bound already so it's not -that- relevant. It would be if we were saturating the network. But yes, I can try to do more tests tomorrow, it would be nice if you could contribute a proper test protocol (or even test on some machines) since you seem to be familiar with those measurements (and I have a very limited access to x86 gear ... basically just my laptop). Cheers, Ben.
