Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753919Ab1FYDQj (ORCPT ); Fri, 24 Jun 2011 23:16:39 -0400 Received: from terminus.zytor.com ([198.137.202.10]:52100 "EHLO mail.zytor.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753811Ab1FYDQi (ORCPT ); Fri, 24 Jun 2011 23:16:38 -0400 References: <4E0506A8.3010102@zytor.com> <4E0512BC.5010900@goop.org> User-Agent: K-9 Mail for Android In-Reply-To: <4E0512BC.5010900@goop.org> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Subject: Re: [PATCH RFC 0/7] x86: convert ticketlocks to C and remove duplicate code From: "H. Peter Anvin" Date: Fri, 24 Jun 2011 20:15:42 -0700 To: Jeremy Fitzhardinge CC: Peter Zijlstra , Linus Torvalds , Ingo Molnar , the arch/x86 maintainers , Linux Kernel Mailing List , Nick Piggin , Jeremy Fitzhardinge Message-ID: <1ade2577-044b-4391-a607-91a4a989c3ff@email.android.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1081 Lines: 33 Jeremy Fitzhardinge wrote: >On 06/24/2011 02:50 PM, H. Peter Anvin wrote: >> 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? > >Sure. Do you mean for the individual lock sequences, or for the >overall >kernel? > > J Overall is fine. -- Sent from my mobile phone. Please excuse my brevity and lack of formatting. -- 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/