Re: [Qemu-devel] [RFC] allow multi-core guests: introduce cores= option to -cpu

From: Andre Przywara <andre.przywara@amd.com>
To: Paul Brook <paul@codesourcery.com>
Cc: qemu-devel@nongnu.org, kvm@vger.kernel.org
Subject: Re: [Qemu-devel] [RFC] allow multi-core guests: introduce cores= option to -cpu
Date: Sat, 4 Jul 2009 01:45:40 +0200	[thread overview]
Message-ID: <4A4E9824.9090200@amd.com> (raw)
In-Reply-To: <200907031646.36268.paul@codesourcery.com>

Paul Brook wrote:
>> currently SMP guests happen to see <n> vCPUs as <n> different sockets.
>> Some guests (Windows comes to mind) have license restrictions and refuse
>> to run on multi-socket machines.
>> So lets introduce a "cores=" parameter to the -cpu option to let the user
>> specify the number of _cores_ the guest should see.
> 
> Sounds like this should be part of the -numa option.
Sound reasonable on the first glance, but would make it rather 
complicated in real life. I suppose multi-core is far more interesting 
to most of the people than multi-node, so I would opt for the easier: 
-smp 2,cores=2 to specify a dual core guest.

Regards,
Andre.

-- 
Andre Przywara
AMD-Operating System Research Center (OSRC), Dresden, Germany
Tel: +49 351 488-3567-12