Dor Laor wrote: > On Mon, 2008-01-28 at 09:32 -0600, Anthony Liguori wrote: > >> Hi Dor, >> >> How are you measuring performance? The numbers I've gotten with netperf >> before and after your patch are: >> >> tx - 647.27mbit >> rx - 89.22 >> >> tx - 27.82 >> rx - 79.93 >> >> > > I've been testing with iperf (patched with Ingo's fix). > I also tested tcp/udp (udp tx is only 550Mbps with the patch, w/o it's > only 220Mbps) >
FWIW, I repeated with an scp test copying a 200mb file from /dev/shm on the host to the guest and vice versa. rx performance is around 3-4 MB/sec. Without your patch, tx performance is around 40 MB/sec whereas with your patch performance is around 30 MB/sec. So the tx drop is definitely exaggerated by netperf. I'm definitely not seeing an increase in throughput though. Could you try a similar scp test? What sort of networking setup are you using? My guest kernel and host kernel are both 2.6.24 (from Ubuntu Hardy). Regards, Anthony Liguori ------------------------------------------------------------------------- This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/ _______________________________________________ kvm-devel mailing list kvm-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/kvm-devel
