Vista Tutorial - Hyper-V CPU performance

Hello

I have a Hyper-V server working great but there is a strange behavior
regarding the CPU utilisation.

We have a software on one of the virtualized server that consumes a lot of
CPU (video encoding). When this software is working, the cpu on the guest
virtualized server goes up to 100%.
This is normal on my point of view.

BUT, I don't understand why:

1. Hyper-V reports that this virtualized server use 24% CPU in the hyper-V
MMC instead of 100%
2. The host server use only 1% of its CPU capacity.

See this screenshot for a better understanding:
http://www.serial-skier.com/hyper-v.png

My question is: What the hell? I thought that Hyper-v was a best choice for
merformance! I think I didn't set something somewhere but what?

Thank you for your help

Hallo Marvin256,

the reason for this is the new virtualization architecture introduced with
Hyper-V.

The host (parent) is nothing more than another virtual machine with it's
own resources (see the nice image on http://www.microsoft.com/windowsserv...-features.aspx).
If your host is not "working" the task-manager will not show any CPU utilization,
even if your VMs are using up all their CPU time. If you want to see the
actual utilization you were correct to look into the Hyper-V console.

I assume that - as you are using a 4-core CPU - your virtual machine is set
up as a single processor machine? This is why you are actually using only
100/4 = 25% of your CPU capacity.

Cheers,
Steffen

mailto:s.hoppe@xxxxxx-soft.de

Hello Steffen

Thank you for your answer.
This is not very clear to me... Where can I see the CPU utilization of my
physical server?
This doesn't make any sense to me.
Yes the physical server is a Quad CPU.

Regards


"Steffen Hoppe" wrote:

1.) Shut down the child partition (guest OS)
2.) Open Hyper-V Manager
3.) Select the child partition in the center pane
4.) Click Settings in the actions pane
5.) Select Processor in the left pane
6.) Set the number of Processors to use in the right pane.

--
Charlie.
http://msmvps.com/blogs/xperts64
http://mvp.support.microsoft.com/profile/charlie.russel

"Marvin256" <Marvin256@xxxxxx> wrote in message
news:8FE72C38-44F5-4DE2-870F-48170E21BC6F@xxxxxx

Hyper-V clocks lie...

http://blogs.msdn.com/tvoellm/archiv...locks-lie.aspx

/ ) Regards,
/ /_________
_|__|__) Paul Weterings
/ (O_) http://www.servercare.nl
__/ (O_)
____(O_)


Marvin256 wrote: