Re: vif interface dropping 80% packets

["Reese Faucette" <reese@myri.com>]

>> update:
>> 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?

yes to both, and have tried with LRO both enabled and disabled.  again, the 
dom0 performance is fine, it's just to domU that is slower.  I have network 
bridging set up on this interface, i.e. peth2, eth2, xenbr2, etc. - is that 
not the way I should be doing it?

>> 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?

This was the mythical patch to make 2.6.18 into a Xen-aware kernel.  Took me 
forever to track it down - is there a more obvious place to look?  Sorry to 
just refer to the file by name, after googling forever i decided i was the 
only person in the Xen world not intimately familiar with this patch.
-reese