Re: [Xen-users] CPU Usage

Antti Kanes
Mon, 30 May 2011 11:00:35 -0000

Have you checked that you''ve got the ACPI Multiprocessor driver in use
in Windows?

In Device Manager, under the Computer node you should have ''ACPI
Multiprocessor PC''. If instead you''re seeing
''Uniprocessor PC'' or similar, just update the driver and
select the multiprocessor one instead.

GPLPV is not needed for this, but I''d really recommend installing them
for anywhere decent I/O performance.

Jonathan Tripathy kirjoitti May 29, 2011 kello 12:33 PM:

>
>> > Also, I upgraded on of my Windows VMs to 2 vCPU, however windows
still
>>
>> > reports just 1. Is this because I need to install the GPLPV
drivers?
>>
>>
>> If it''s Windows 7:
>>
>>
http://answers.microsoft.com/en-us/windows/forum/windows_7-hardware/howto-get-windows-7-to-detect-your-new-multi-core/71519d51-f6cb-47df-b3ff-66c2928d6de4
>>
>>
>> otherwise I would check ACPI settings.
>>
>>
> It''s Windows server 2003 32-bit. I haven''t installed any
GPLPV drivers (Should I?)
>
> I checked in device manager on the DomU and it indeed shows the 2 CPU
cores:
> "Intel Xeon CPU"
> "Intel Xeon CPU"
>
> (I''ve ommited the model and speed just to keep it simple)
>
> However the task manager only shows one graph
>
> Any Ideas?
>
> Thanks
>
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