[Xen-devel] PCI-E networking

["Apparao, Padmashree K" <padmashree.k.apparao@xxxxxxxxx>]

Hi,

 

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?

 

Suggestions

 

Thanks

-          Padma

 

 

 

 

 

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