RE: [Xen-users] Re: setting CPUs per socket in Xen?

["Venefax" <venefax@xxxxxxxxx>]

I want to do the same. Can you please explain what the '1:edx=xxx1xxxxxxxxxxxxxxxxxxxxxxxxxxxx” means and where do we get the meaning of the “xxxx”

Federico

 

From: xen-users-bounces@xxxxxxxxxxxxxxxxxxx [mailto:xen-users-bounces@xxxxxxxxxxxxxxxxxxx] On Behalf Of PattiMichelle
Sent: Tuesday, November 25, 2008 11:02 AM
To: xen-users@xxxxxxxxxxxxxxxxxxx
Subject: [Xen-users] Re: setting CPUs per socket in Xen?

 

Thank You, Rob - I read all the posts in this list and the one relevant post didn't quite provide enough information, and it's not clear where to find this in the documentation in order to decode it and apply it to my situation (8 sockets = 32 processors).

I found the solution to this problem, in my hvm windows config file I added:

cpuid='1:edx=xxx1xxxxxxxxxxxxxxxxxxxxxxxxxxxx,ebx=xxxxxxxx00010000xxxxxxxxxxxxxxxx','4,0:eax=001111xxxxxxxxxxxxxxxxxxxxxxxxxx']

vcpus=8

Which makes the 8 CPUs appear to the guest os as a single 8 core

rather than 8 separate cpus, as windows is limited to 2 sockets it now

sees all 8 cores in task manager.

xen-users-request@xxxxxxxxxxxxxxxxxxx wrote:

On Mon, Nov 24, 2008 at 05:39, PattiMichelle <miche1@xxxxxxxxxxxxx> wrote:

I am trying to figure out how to set the number of CPUs per socket in my

VMs.  My install of Win2003Server Enterprise should support at least 16

CPUs, but it sees only 8.  I was told this is because by default, Xen 3

gives the guest OS vcpus at 1 per socket and W2k3E supports "8 sockets."

How can I set Xen to give more than one CPU per socket?  I have 32 CPUs

available (8 quad-core opterons).

See the thread titled "Windows and Multiple CPUS?", which was started

on the 19th of September:

http://lists.xensource.com/archives/html/xen-users/2008-09/msg00657.html

 

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