Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755257Ab1FXVvQ (ORCPT ); Fri, 24 Jun 2011 17:51:16 -0400 Received: from terminus.zytor.com ([198.137.202.10]:39758 "EHLO mail.zytor.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752785Ab1FXVvN (ORCPT ); Fri, 24 Jun 2011 17:51:13 -0400 Message-ID: <4E0506A8.3010102@zytor.com> Date: Fri, 24 Jun 2011 14:50:32 -0700 From: "H. Peter Anvin" User-Agent: Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.2.17) Gecko/20110428 Fedora/3.1.10-1.fc15 Thunderbird/3.1.10 MIME-Version: 1.0 To: Jeremy Fitzhardinge CC: Peter Zijlstra , Linus Torvalds , Ingo Molnar , the arch/x86 maintainers , Linux Kernel Mailing List , Nick Piggin , Jeremy Fitzhardinge Subject: Re: [PATCH RFC 0/7] x86: convert ticketlocks to C and remove duplicate code References: In-Reply-To: Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 780 Lines: 21 On 06/23/2011 06:19 PM, Jeremy Fitzhardinge wrote: > > I've been running with this code in place for several months on 4 core > systems without any problems. > > I couldn't measure a consistent performance difference between the two > implemenations; there seemed to be +/- ~1% +/-, which is the level of > variation I see from simply recompiling the kernel with slightly > different code alignment. > > Overall, I think the large reduction in code size is a big win. > Could you give us the delta in *compiled* code size? -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/