Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1761233AbXKER1i (ORCPT ); Mon, 5 Nov 2007 12:27:38 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1760255AbXKERXF (ORCPT ); Mon, 5 Nov 2007 12:23:05 -0500 Received: from terminus.zytor.com ([198.137.202.10]:43298 "EHLO terminus.zytor.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1759422AbXKERXD (ORCPT ); Mon, 5 Nov 2007 12:23:03 -0500 Message-ID: <472F516C.6020702@zytor.com> Date: Mon, 05 Nov 2007 09:22:52 -0800 From: "H. Peter Anvin" User-Agent: Thunderbird 2.0.0.5 (X11/20070727) MIME-Version: 1.0 To: =?ISO-8859-1?Q?Bo_Brant=E9n?= CC: linux-kernel@vger.kernel.org Subject: Re: x86_64 ten times slower than i386 References: <20071103162640.GS17536@waste.org> In-Reply-To: Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 938 Lines: 24 Bo Brant?n wrote: > >> On Sat, 3 Nov 2007, Matt Mackall wrote: >> >>> This is typically due to a problem with the setup of your MTRRs. Try > > This is the output from cat /proc/mtrr > > reg00: base=0x00000000 ( 0MB), size=2048MB: write-back, count=1 > reg01: base=0x80000000 (2048MB), size=1024MB: write-back, count=1 > reg02: base=0xc0000000 (3072MB), size= 256MB: write-back, count=1 > reg03: base=0xcf800000 (3320MB), size= 8MB: uncachable, count=1 > reg04: base=0xcf700000 (3319MB), size= 1MB: uncachable, count=1 Confusing! Your maximum would be 3072+256M = 3328M, except that because of the uncachable MTRRs (presumably stolen memory for video), the maximum is 3319M. -hpa - 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/