Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1760821AbXJDTIu (ORCPT ); Thu, 4 Oct 2007 15:08:50 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1757269AbXJDTIn (ORCPT ); Thu, 4 Oct 2007 15:08:43 -0400 Received: from mx1.redhat.com ([66.187.233.31]:33864 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757315AbXJDTIn (ORCPT ); Thu, 4 Oct 2007 15:08:43 -0400 Date: Thu, 4 Oct 2007 15:08:37 -0400 From: Dave Jones To: Andi Kleen Cc: Nick Piggin , Linux Kernel Mailing List , Linus Torvalds Subject: Re: [rfc][patch 2/3] x86: fix IO write barriers Message-ID: <20071004190837.GD23300@redhat.com> Mail-Followup-To: Dave Jones , Andi Kleen , Nick Piggin , Linux Kernel Mailing List , Linus Torvalds References: <20071004052153.GA15131@wotan.suse.de> <200710042021.59704.ak@suse.de> <20071004184107.GC23300@redhat.com> <200710042058.27640.ak@suse.de> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <200710042058.27640.ak@suse.de> User-Agent: Mutt/1.5.14 (2007-02-12) Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1522 Lines: 36 On Thu, Oct 04, 2007 at 08:58:27PM +0200, Andi Kleen wrote: > On Thursday 04 October 2007 20:41:07 Dave Jones wrote: > > On Thu, Oct 04, 2007 at 08:21:59PM +0200, Andi Kleen wrote: > > > On Thursday 04 October 2007 20:10:44 Dave Jones wrote: > > > > On Thu, Oct 04, 2007 at 07:53:16PM +0200, Andi Kleen wrote: > > > > > > > > > > > The only vendor that ever implemented OOSTOREs was Centaur, and they > > > > > > only did in the Winchip generation of the CPUs. When they dropped it > > > > > > from the C3, I asked whether they intended to bring it back, and the > > > > > > answer was "extremely unlikely". > > > > > > > > > > > > > > > > Do you know if it made a big performance difference? > > > > > > > > On the winchip, it was a huge win. I can't remember exact numbers, > > > > but pretty much every benchmark I threw at it at the time showed > > > > significant improvement. > > > > > > Significant as in >10%? > > > > "Worth about 10-20% performance" according to the 2.4.18pre9-ac4 > > release notes: http://www.linuxtoday.com/news_story.php3?ltsn=2002-02-14-015-20-NW-KN > > Are there numbers for a newer kernel available too? no idea, my winchips died about 5 years ago. Dave -- http://www.codemonkey.org.uk - 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/