100% Utilization doing nothing than DPC!

Hi,

I recently got my new PC, and installed the Hype-V Virtual server on it,
running “Windows Server 2008 R2 64bit”. I have never had any problem with
Hyper-V, but on this new hardware:
Intel® Core™ i7 CPU 920 @ 2.67GHz, 12GB RAM

My problem with this hardware is, that if I set my virtual machines (all
running Windows XP SP3) to use 2 CPU’s, I seem to get an 100% utilization all
the time on the virtual machines (3/4 running instances) doing nothing but
DPC calls! The server is doing nearly nothing except that one of the server
CPU has a 100% utilization – the others, doing nothing!

What is going on, and what am I doing wrong?

--
Jens Søe Christiansen

I have the same issue. CPU i7 930, 6GbRAM, Server 2008 R2 64-bit, Virtual Machine is XP SP3 with Virtual Additions installed, 4Gb RAM, and 1-4CPUs (same problem with 1, 2, 3, or 4 CPUs). I have found that pausing the virtual machine and resuming right away clears the problem. even Sysinternals Process Explorer pauses but when system resumes I notice the spike to 100% on DPCs.

> On Wednesday, July 07, 2010 1:50 PM S?e wrote:

> Hi,
>
> I recently got my new PC, and installed the Hype-V Virtual server on it,
> running ???Windows Server 2008 R2 64bit???. I have never had any problem with
> Hyper-V, but on this new hardware:
> Intel?? Core??? i7 CPU 920 @ 2.67GHz, 12GB RAM
>
> My problem with this hardware is, that if I set my virtual machines (all
> running Windows XP SP3) to use 2 CPU???s, I seem to get an 100% utilization all
> the time on the virtual machines (3/4 running instances) doing nothing but
> DPC calls! The server is doing nearly nothing except that one of the server
> CPU has a 100% utilization ??? the others, doing nothing!
>
> What is going on, and what am I doing wrong?
>
> --
> Jens S??e Christiansen


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