WARNING - OLD ARCHIVES

This is an archived copy of the Xen.org mailing list, which we have preserved to ensure that existing links to archives are not broken. The live archive, which contains the latest emails, can be found at http://lists.xen.org/
   
 
 
Xen 
 
Home Products Support Community News
 
   
 

xen-users

RE: [Xen-users] Slow Network Performance on GPLPV 9.12-pre13

To: "Mark Pace" <pace@xxxxxxxxxxxxxxxxxxx>
Subject: RE: [Xen-users] Slow Network Performance on GPLPV 9.12-pre13
From: "James Harper" <james.harper@xxxxxxxxxxxxxxxx>
Date: Sat, 18 Apr 2009 10:59:36 +1000
Cc: xen-users@xxxxxxxxxxxxxxxxxxx
Delivery-date: Fri, 17 Apr 2009 18:00:22 -0700
Envelope-to: www-data@xxxxxxxxxxxxxxxxxxx
In-reply-to: <49E8EA48.4050204@xxxxxxxxxxxxxxxxxxx>
List-help: <mailto:xen-users-request@lists.xensource.com?subject=help>
List-id: Xen user discussion <xen-users.lists.xensource.com>
List-post: <mailto:xen-users@lists.xensource.com>
List-subscribe: <http://lists.xensource.com/mailman/listinfo/xen-users>, <mailto:xen-users-request@lists.xensource.com?subject=subscribe>
List-unsubscribe: <http://lists.xensource.com/mailman/listinfo/xen-users>, <mailto:xen-users-request@lists.xensource.com?subject=unsubscribe>
References: <49E7AEA5.4090209@xxxxxxxxxxxxxxxxxxx> <AEC6C66638C05B468B556EA548C1A77D0162D0F1@trantor> <49E80B4A.9090007@xxxxxxxxxxxxxxxxxxx> <AEC6C66638C05B468B556EA548C1A77D0162D118@trantor> <49E8EA48.4050204@xxxxxxxxxxxxxxxxxxx>
Sender: xen-users-bounces@xxxxxxxxxxxxxxxxxxx
Thread-index: Acm/nWVEwlC1crirSWyz4BMqaJJ45wAIxhyw
Thread-topic: [Xen-users] Slow Network Performance on GPLPV 9.12-pre13
> 
>       Just turn off checksum offload and large send offload in the DomU
>       (advanced properties of network adapter). See if that makes a
>       difference.
> 
> That did the trick.  Does that mean that something is up with my host not
> supporting TCP offload correctly or something is not set right on it?
> 

I think that quite a few Linux network drivers don't support offload correctly 
once you start using bridging or anything other than a plain 'ethX' interface.

Don't rule out a problem with the GPLPV drivers though... it's possible I'm 
doing something incorrectly that some drivers can tolerate and some can't. I 
can't think what though.

James
_______________________________________________
Xen-users mailing list
Xen-users@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-users