Hi,
Have you tried a vm with the pv drivers installed?
What about Linux vms?
Ian
On 10 Jun 2011, at 19:15, "Iordan Iordanov" <iordan@xxxxxxxxxxxxxxx> wrote:
> Hi,
>
> I don't know if this is a known issue, but I couldn't find any references to
> it online, so I figured I'd start a topic here.
>
> I am running Debian 6 (Squeeze), and have the standard Debian 6 Xen kernel
> and all the Xen support tools and packages that come from Squeeze. I've
> created a Xen VM on the local disk:
>
> - dd if=/dev/zero of=somefile bs=1024k count=4000 to create the disk
> - Installed Windows XP sp3 from an ISO file (standard installation with no
> extras).
>
> After booting into Windows, without any updates or anything running in
> windows, I am observing a 2 - 3 second lag or freeze or whatever you want to
> call it every few minutes. This happens no matter whether I am running a
> "local console", or connecting via VNC to the virtual machine. During the
> freeze, I've got ssh shells and lots of stuff open on the server, and
> everything is running, so it's not the connection. Also, the machine is not
> on a remote server, so it's not NFS or something like that.
>
> While running top, I observe that during the freeze, all of the Xen-related
> processes drop off the list (i.e. do not take up any CPU-time). There are no
> tell-tale dmesg messages. Here are some details of the system:
>
> Supermicro H8DGU-F motherboard, 2x Magny-cours CPU with 12 cores each, 64GB
> of RAM. uname -a reports:
>
> Linux vsrv1 2.6.32-5-xen-amd64 #1 SMP Thu May 19 01:16:47 UTC 2011 x86_64
> GNU/Linux
>
> The reason I am certain this is a Xen issue, is that running the exact same
> VM image with qemu-kvm produces no such effect.
>
> Many thanks for any input and/or workarounds!
>
> Iordan Iordanov
>
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>
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