Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1763850AbYBZTBR (ORCPT ); Tue, 26 Feb 2008 14:01:17 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1760057AbYBZTBC (ORCPT ); Tue, 26 Feb 2008 14:01:02 -0500 Received: from wr-out-0506.google.com ([64.233.184.230]:43269 "EHLO wr-out-0506.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1759825AbYBZTBA (ORCPT ); Tue, 26 Feb 2008 14:01:00 -0500 DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=message-id:date:from:to:subject:cc:in-reply-to:mime-version:content-type:content-transfer-encoding:content-disposition:references; b=YN9bbplsBFZP5xKUdiit3eSsKna9maVeiyc5FEJGahrk1d3XVbbEzUYMl9GYQSv0kcwzH+3tW72yHICj5+5/rW0HkDUP5vsUaK3XevdJbw8IhhwpRLvPFiEgat1/ObyW0cMVpCkwE5vTGzbw7/l2DrTnd+5CzRwYH6p916k+0DY= Message-ID: <86802c440802261100j322ee6a6yef9108dc175de459@mail.gmail.com> Date: Tue, 26 Feb 2008 11:00:58 -0800 From: "Yinghai Lu" To: "Ravikiran Thirumalai" Subject: Re: [PATCH] x86_64: make amd quad core 8 socket system not be clustered_box v2 Cc: "Andi Kleen" , "Ingo Molnar" , "Andrew Morton" , "Linux Kernel Mailing List" , shai@scalemp.com In-Reply-To: <20080226184235.GA5914@localdomain> MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Content-Disposition: inline References: <200802221102.31019.yinghai.lu@sun.com> <200802232148.43255.yinghai.lu@sun.com> <20080224122903.GC13637@one.firstfloor.org> <20080225190819.GE3143@localdomain> <86802c440802251405w7025a8b2na5fde4dcbf56067e@mail.gmail.com> <20080226033945.GJ3143@localdomain> <20080226034625.GE21577@one.firstfloor.org> <20080226040541.GK3143@localdomain> <86802c440802252127i36fcd164xe6671aada160766a@mail.gmail.com> <20080226184235.GA5914@localdomain> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1856 Lines: 50 On Tue, Feb 26, 2008 at 10:42 AM, Ravikiran Thirumalai wrote: > On Mon, Feb 25, 2008 at 09:27:42PM -0800, Yinghai Lu wrote: > >On Mon, Feb 25, 2008 at 8:05 PM, Ravikiran Thirumalai wrote: > >> On Tue, Feb 26, 2008 at 04:46:25AM +0100, Andi Kleen wrote: > >> > >> > > > >> >If you can't support that in your hardware you're supposed > >> >to clear it. > >> > >> Hmm! How would a hardware vendor do that? That doesn't seem to be clear in > >> the BKDG. (Well, this is the problem with undocumented features :() > >> > >any good sign for APIC_clustered box? there is apicid between cpus > >even all cpu are quadcore and fully populated? > > I would suggest checking the SLIT distances -- On AMD boxes, if you have three > different distances between nodes, then that system would be multiboard, > and there is no way TSCs can be synced. On Intel boxes, if there are two > different distances between nodes, then this would be a multi board/multi > chassi box and TSCs won't be synced. This is a more generic solution and > should work on Summit/Unisys boxes as well. (I am ignoring Intel CSI for > now. It might need the same treatment as AMD) 1. if acpi=off ? 2. some system will be treated wrong. my four sockets system ACPI: SLIT: nodes = 4 10 13 13 16 13 10 16 13 13 16 10 13 16 13 13 10 my eight sockets system ACPI: SLIT: nodes = 8 10 12 12 14 14 14 14 16 12 10 14 12 14 14 12 14 12 14 10 14 12 12 14 14 14 12 14 10 12 12 14 14 14 14 12 12 10 14 12 14 14 14 12 12 14 10 14 12 14 12 14 14 12 14 10 12 16 14 14 14 14 12 12 10 YH -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/