RE: [Xen-devel] vif interface dropping 80% packets

Ian Pratt
Tue, 06 Feb 2007 23:06:40 -0000

> update:
> MTU=9000 does work, I had failed to set one of the vif interfaces -
plenty
> of interfaces to change ;-)
> The performance is better with 9k MTU, as expected:
> TCP_STREAM and TCP_SENDFILE both get ~1.8Gb/s, xentop reports 87%
> utilization for dom0, so I guess that''s about all I can expect
without
code
> changes.

I''ve seen rather better figures than this with another 10G card.

Does your NIC/driver support TSO and LRO?

> before I spend a lot of time converting to 3.0.4, a couple of
questions:
> 1) any reason to expect better perf on 3.0.4 ?

Yes, there were changes in the RX path.

> 2) if yes, Will the patch "fedora-36252.patch" work on the 2.6.16
kernel
> included with 3.0.4, or have conflicts crept in?

No idea. What does the patch do?

Ian