FW: [Xen-users] How to: Improve Network Throughput of a XEN kernel?

[Mike Viau <viaum@sheridanc.on.ca>]

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Hello again,

Just a quick update...

I was really hoping it was just going to be an issue with the kernel .config, however I copied exact configuration from the working Debain 2.6.26-2-xen-amd64 kernel and used a make oldconfig but the end result was the same.

After booting the xenified (2.6.31.12) or pvops kernel (2.6.31.6) via both xen-hypervisor 3.2.1 or xen-hypervisor 3.4.2 the maximum data transfer to/from the Dom0 (Xen host) is ~1MB/s.

Next I plan on re-trying my efforts on a Ubuntu system to see if same network bottlenecking is present.
 		 	   		  


Date: Fri, 26 Feb 2010 09:16:59 -0800
From: bderzhavets@yahoo.com
Subject: Re: [Xen-users] How to: Improve Network Throughput of a XEN kernel?
To: xen-users@lists.xensource.com; viaum@sheridanc.on.ca

Would escalate to xen-devel.  2.6.31.8 (12) aka Suse xenified  was Jan Beulich stuff.
He might have an answer.
Boris.

--- On Fri, 2/26/10, Mike Viau <viaum@sheridanc.on.ca> wrote:

From: Mike Viau <viaum@sheridanc.on.ca>
Subject: [Xen-users] How to: Improve Network Throughput of a XEN kernel?
To: xen-users@lists.xensource.com
Cc: waldi@debian.org
Date: Friday, February 26, 2010, 12:09 PM















Hi there,

I am starting a new thread to try and solve a problem I am having will slow network throughput to the XEN host (not to a domU).

I have confirmed my problem occurs with PVOPS  'xen/master' kernel as well using http://pasik.reaktio.net/xen/pv_ops-dom0-debug/config-2.6.31.6-pvops-dom0-xen-master-x86_64 as the .config.

It also occurs with a forward ported xenified kernel (2.6.31.12) using the attached config-11-xen (.config).

However when using the xen kernel found in debain lenny (2.6.26-2) for the amd64 architecture I get similiar transfer rates to my Xen host as I do on a baremetel kernel.

Bastian Blank perhaps you could point me in the right direction in regards to a debian specific customization or patch I should be aware of?

Maxium transfer rate (to/from
 hard disk) using the PVOPS  'xen/master' kernel and forward ported xenified kernel (2.6.31.12) is bottlenecking at ~1MB/s. On the debain lenny xen kernel I am getting ~4.5MB/s.

I was
hoping one could suggest options in the .config that might be modified
in order to improve network throughput of a XEN kernel and therefor increase the data transfer rates over the netowork to and from the Xen host.

Thanks alot for any help! As always I will be willing to accept any suggestions :)


-M

 		 	   		  
 		 	   		  
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