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/
Home Products Support Community News


RE: [Xen-users] GPLPV driver Send performance

To: "Klaus Steinberger" <klaus.steinberger@xxxxxxxxxxxxxxxxxxxxxx>
Subject: RE: [Xen-users] GPLPV driver Send performance
From: "James Harper" <james.harper@xxxxxxxxxxxxxxxx>
Date: Fri, 4 Dec 2009 22:16:21 +1100
Cc: "Fajar A. Nugraha" <fajar@xxxxxxxxx>, xen-users@xxxxxxxxxxxxxxxxxxx
Delivery-date: Fri, 04 Dec 2009 03:17:15 -0800
Envelope-to: www-data@xxxxxxxxxxxxxxxxxxx
In-reply-to: <4B18ED1C.4010804@xxxxxxxxxxxxxxxxxxxxxx>
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: <4B18D16C.7080403@xxxxxxxxxxxxxxxxxxxxxx><7207d96f0912040127h69b8ae97g705c857eaabd702d@xxxxxxxxxxxxxx> <20091204112628.14713kwwjhei5hwk@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx> <AEC6C66638C05B468B556EA548C1A77D0180D982@trantor> <4B18ED1C.4010804@xxxxxxxxxxxxxxxxxxxxxx>
Sender: xen-users-bounces@xxxxxxxxxxxxxxxxxxx
Thread-index: Acp00dD7wdF3Mx4HTI6zIHjsnHK/8gAAU88Q
Thread-topic: [Xen-users] GPLPV driver Send performance
> Hi James,
> > Just out of interest, is the send being done to a physical machine
> > another VM? Offload is a bit of a funny thing... in my case I have
> The test was from DomU to the hosting Dom0, but I did the test because
I had
> performance problems from DomU to a external physical machine.
> > problems when the packet goes from a Windows DomU running GPLPV with
> > offload or even Linux with offload onto a bridge in Dom0 and then
out a
> > vlan on a physical adapter. It looks like my network adapter doesn't
> Uhh, it was a VLAN, probably that is the culprit?

Could be, but if it went from DomU->Dom0 and didn't cross a physical
adapter then I wouldn't have thought so.


Xen-users mailing list