This is an archived copy of the Xen.org mailing list, which we have preserved to ensure that existing links to archives are not broken. The live archive, which contains the latest emails, can be found at http://lists.xen.org/
Home Products Support Community News


[Xen-devel] Re: [PATCH][RFC][2/2] x86 SMP: enables core-pair topology de

To: Wei Huang <wei.huang2@xxxxxxx>
Subject: [Xen-devel] Re: [PATCH][RFC][2/2] x86 SMP: enables core-pair topology detection for AMD CPUs
From: George Dunlap <george.dunlap@xxxxxxxxxx>
Date: Mon, 27 Jun 2011 12:10:41 +0100
Cc: George Dunlap <George.Dunlap@xxxxxxxxxxxxx>, "'xen-devel@xxxxxxxxxxxxxxxxxxx'" <xen-devel@xxxxxxxxxxxxxxxxxxx>, Keir Fraser <keir.xen@xxxxxxxxx>, Jan Beulich <JBeulich@xxxxxxxxxx>
Delivery-date: Mon, 27 Jun 2011 04:13:10 -0700
Envelope-to: www-data@xxxxxxxxxxxxxxxxxxx
In-reply-to: <4E03C396.7000108@xxxxxxx>
List-help: <mailto:xen-devel-request@lists.xensource.com?subject=help>
List-id: Xen developer discussion <xen-devel.lists.xensource.com>
List-post: <mailto:xen-devel@lists.xensource.com>
List-subscribe: <http://lists.xensource.com/mailman/listinfo/xen-devel>, <mailto:xen-devel-request@lists.xensource.com?subject=subscribe>
List-unsubscribe: <http://lists.xensource.com/mailman/listinfo/xen-devel>, <mailto:xen-devel-request@lists.xensource.com?subject=unsubscribe>
References: <4E03C396.7000108@xxxxxxx>
Sender: xen-devel-bounces@xxxxxxxxxxxxxxxxxxx
On Thu, 2011-06-23 at 23:52 +0100, Wei Huang wrote:
> x86: AMD core-pair topology detection code
> This patch is to support core-pair topology introduced by AMD CPUs, 
> which introduces a new concept of [core, compute unit]. There is a new 
> feature bit for topology extension in CPUID:0x80000001. Also a new CPUID 
> 0x8000001E is introduced for CPU topology enumeration. This patch 
> collects the sibling information from the new CPUID and will be stored 
> in the sibling map in Xen hypervisor.
> Signed-off-by: Wei Huang <wei.huang2@xxxxxxx>

Can't comment on the code itself (not my area), but wrt to effects it
will have on the Xen scheduler:

Acked-by: George Dunlap <george.dunlap@xxxxxxxxxxxxx>

Xen-devel mailing list

<Prev in Thread] Current Thread [Next in Thread>