From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754528AbaIPQBl (ORCPT ); Tue, 16 Sep 2014 12:01:41 -0400 Received: from bombadil.infradead.org ([198.137.202.9]:55194 "EHLO bombadil.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753895AbaIPQBk (ORCPT ); Tue, 16 Sep 2014 12:01:40 -0400 Date: Tue, 16 Sep 2014 18:01:34 +0200 From: Peter Zijlstra To: Chuck Ebbert Cc: Ingo Molnar , Dave Hansen , linux-kernel@vger.kernel.org, borislav.petkov@amd.com, andreas.herrmann3@amd.com, hpa@linux.intel.com, ak@linux.intel.com Subject: Re: [PATCH] x86: Consider multiple nodes in a single socket to be "sane" Message-ID: <20140916160134.GB2848@worktop.localdomain> References: <20140915222641.D640BD8A@viggo.jf.intel.com> <20140916032920.GH2840@worktop.localdomain> <20140916013845.390833b9@as> <20140916064403.GC14807@gmail.com> <20140916020300.5013b8f0@as> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20140916020300.5013b8f0@as> User-Agent: Mutt/1.5.22.1 (2013-10-16) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, Sep 16, 2014 at 02:03:00AM -0500, Chuck Ebbert wrote: > Hmm, looking closer at the diagram, each ring has its own memory controller, so > it really is NUMA if you break the interconnect between that caches. How does it do that? Does it split the DIMM slots in two as well, with half for the one node and the other half for the other? Or will both 'nodes' share the same local memory? In the first case its full NUMA, in the second case, not so much.