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
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