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


[Xen-devel] Release 0.8.9 of GPL PV drivers for Windows

To: <xen-devel@xxxxxxxxxxxxxxxxxxx>, <xen-users@xxxxxxxxxxxxxxxxxxx>
Subject: [Xen-devel] Release 0.8.9 of GPL PV drivers for Windows
From: "James Harper" <james.harper@xxxxxxxxxxxxxxxx>
Date: Sat, 26 Apr 2008 16:49:59 +1000
Delivery-date: Fri, 25 Apr 2008 23:50:27 -0700
Envelope-to: www-data@xxxxxxxxxxxxxxxxxx
List-help: <mailto:xen-devel-request@lists.xensource.com?subject=help>
List-id: Xen developer discussion <xen-devel.lists.xensource.com>
List-post: <mailto:xen-devel@lists.xensource.com>
List-subscribe: <http://lists.xensource.com/cgi-bin/mailman/listinfo/xen-devel>, <mailto:xen-devel-request@lists.xensource.com?subject=subscribe>
List-unsubscribe: <http://lists.xensource.com/cgi-bin/mailman/listinfo/xen-devel>, <mailto:xen-devel-request@lists.xensource.com?subject=unsubscribe>
Sender: xen-devel-bounces@xxxxxxxxxxxxxxxxxxx
Thread-index: Acinab8ay6c6jYI8SFmzAK/E2RWDwA==
Thread-topic: Release 0.8.9 of GPL PV drivers for Windows
Here's the latest version. Took me ages to get to the bottom of what
turned out to be a pretty simple problem - windows can give us more
pages in a packet than Linux can handle but Linux (netback) doesn't
complain about it, it just creates corrupt packets :(

Download from http://www.meadowcourt.org/WindowsXenPV-0.8.9.zip

I'll probably do another release very shortly, mainly to reduce memory
consumption on the tx side so that more interfaces can run at once.

>From the testing I've done, on a UP windows DomU, with iperf options '-l
1M -w 1M', with the iperf server running in Dom0, I get TX throughput of
about 1.5Gbits/second and RX throughput of about 0.5Gbits/second. When I
tried it under SMP it worked, but the performance was horrible. Probably
best if you don't run it under SMP for the moment :)

I did have a test performance of 2.5Gbits/second, but now that I have to
copy the windows buffers into my own buffers to reduce page usage, I
seem to only be able to get about 1.5Gbits/second out of it... This kind
of makes sense given that DomU to Dom0 network performance is going to
be CPU and Memory bandwidth bound.


Xen-devel mailing list