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Re: [Xen-users] XCP Linux Para virtualization 10 GigE interfaces

  • To: Hoot Thompson <hoot@xxxxxxxxxx>
  • From: Dustin Marquess <dmarquess@xxxxxxxxx>
  • Date: Tue, 19 Apr 2011 09:32:48 -0700
  • Cc: xen-users@xxxxxxxxxxxxxxxxxxx
  • Delivery-date: Tue, 19 Apr 2011 09:34:11 -0700
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First step is to run the script under "Disable CheckSum Offload" @

Second step is to tweak your TCP stack for 10 GigE.  Something like:

This will help.  But to get near native speeds you're going to have to
go SR-IOV.  That's really the only way to get high speed networking in
a VM setup.


On Tue, Apr 19, 2011 at 7:04 AM, Hoot Thompson <hoot@xxxxxxxxxx> wrote:
> My test system consists of two XCP 1.0 nodes plus an Ubuntu frontend running
> OpenXenManager. The two XCP 1.0 nodes have both GigE and 10 GigE interfaces
> but of interest is the 10 GigE.  My goal is to get wire speed on the 10 GigE
> from guests running on each of the nodes. So far I have built CentOS 5.6
> guests on both the nodes and I have brought up the 10 GigE interface between
> the two. Performance is around 20% of wire. My assumption is that I need to
> run para virtualized drivers. So that's my question, how do I set it up? So
> far on each of the CentOS guests I've installed kmod-xenpv (yum install
> kmod-xenpv*). Good so far? What next?
> Thanks in advance!
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