Vista - VPC mini-freezes/hangs

We're suffering small performance issues when running VMs on 2 of our 4
developer machines with Win7 RC Ultimate x64 installed (the other 2 machines
experience no problems at all).
Mouse actions and keyboard actions (cursor movement or typing) have regular
mini-freezes which result in a "laggy" experience. CPU usage also seems to
jump around between low and high values without any reason, with the
taskmanager also freezing up in intervals of half a second or more and using
up to 50% of the CPU at certain moments.

We've already experienced this problem with Windows XP and Windows Server
2003 virtual machines. Using remote desktop doesn't fix the problem.
I found a small tweak with booting a 2nd virtual machine (let's say a Win7
VM with 512mb ram) that almost removed the 'laggy' experience, but you can
understand this isn't a nice way to work.

Installing/Enabling/Disabling Integration Features doesn't make a real
difference (on first impression).

All 4 machines (so 2 with problems and 2 without) are running clean Win7 RC1
x64 installation on an Intel Core2 Duo T7500 @ 2.2GHz, with 4GB of RAM. All
other hardware/software (even BIOS version) is the same between these
machines.

I wonder if this is a known issue and if there is any solution to it.

PS. To be completely clear: this is with Windows Virtual PC (not Virtual PC
2007)

Hi Bart,

I too have had exactly the same problems, unfortunately it appears to be
bugs with the beta of Virtual PC. Virtual PC 2007 runs absolutely fine for
me, but I can't even install Windows on a fresh VM without having to wait
hours for the cursor to move around the screen. It's actually as if the
Host isn't allocating enough CPU time to the VM, one reason I say this is
that if you run a scan of the hard disk (I used Live OneCare) all the time
the scan is working the speed of the VM increases to usable speeds.

Crazy I know lol!

Nick.

"Bart L" <Bart L@xxxxxx> wrote in message
news:32F48DDC-1B04-4B67-AC7C-E3ECCBC0826A@xxxxxx

On 5月26日, 下�6时52分, "nak" <a....@xxxxxx> wrote:Hi, there is a "Windows Virtual PC beta" in Microsoft download center:
http://www.microsoft.com/downloads/d...6-27f6ef5dceb9
It is said for Windows 7 beta, you can have a try.

I have temporarily 'fixed' the issue with running my webradio in Windows
Media Player on my host machine. This gives a constant CPU-usage (of 2-3%)
which seems to be the key to remove the laggy experience in your VPC.

Still looking forward for a real fix though.

Greetings
Bart

"Bart L" wrote:

Hi Bart,
haha! That's better than my fix, at least you get something else out of
it.

A "Real Fix" would be to uninstall it and stick Virtual PC 2007 back on
your machine. I can't see it getting any better until the next release
(whenever that is).

Nick.

On Wed, 27 May 2009 14:48:01 -0700, Bart L
<BartL@xxxxxx> wrote:
Have you posted this to the VPC7 beta forums, or even better logged it
as a bug?

This definitely sounds like a power management issue...its been around
forever, other versions of VPC too. It realy comes down to how the
hardware does power management and throttles back the CPU.

--
Cheers,
Steve Jain, Virtual Machine MVP
http://vpc.essjae.com/