RE: [Xen-devel] PCI-E networking

["Ian Pratt" <m+Ian.Pratt@xxxxxxxxxxxx>]

> I see a weird problem with networking under Xen. I am using 2 dual
ports
> PCI-e nics in my platform and a single PCI-X nic. Each PCI-E nic
shares an
> irq. Each port is on a different subnet.
>  
> In native linux I can get line rate in each port.
> 
> In Xen (custome xen-unstable)  however, a ping on each subnet is very
> slooow. A ping takes about 3000ms or even more.
> 
> In fact I downloaded the Xen 3.0.2-3 testing build of xen and I see
the
> problem there too. Has anyone seen this kind of behavior? Is this
related
> to the interrupt sharing of the ports?

Odd. First thing to try is switching to xen-unstable or 3.0.3-testing
there have been some interrupt changes, but still no MSI support, I'm
afraid.

Ian

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