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

["Hoot Thompson" <hoot@xxxxxxxxxx>]

Dustin,

I'm back. In the interim I've secured two loaner NICs from Intel that
support SR-IOV. Problem I'm now having is that my VM dies right after the
interfaces are brought up when I enable the technology. My VM is CentOS 5.5.
Have you or do you know someone that has gotten SR-IOV working on an XCP
base and if so, what was used for the guest OS?

Thanks!

-----Original Message-----
From: xen-users-bounces@xxxxxxxxxxxxxxxxxxx
[mailto:xen-users-bounces@xxxxxxxxxxxxxxxxxxx] On Behalf Of Dustin Marquess
Sent: Tuesday, April 19, 2011 12:33 PM
To: Hoot Thompson
Cc: xen-users@xxxxxxxxxxxxxxxxxxx
Subject: Re: [Xen-users] XCP Linux Para virtualization 10 GigE interfaces

First step is to run the script under "Disable CheckSum Offload" @
http://www.xenappblog.com/2010/citrix-xenserver-slow-network-performance/

Second step is to tweak your TCP stack for 10 GigE.  Something like:
http://staff.psc.edu/benninge/networking/10GbE/parameters.html

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.

-Dustin

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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