From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S267436AbUHPFBz (ORCPT ); Mon, 16 Aug 2004 01:01:55 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S267437AbUHPFBz (ORCPT ); Mon, 16 Aug 2004 01:01:55 -0400 Received: from mx2.elte.hu ([157.181.151.9]:62400 "EHLO mx2.elte.hu") by vger.kernel.org with ESMTP id S267436AbUHPFB3 (ORCPT ); Mon, 16 Aug 2004 01:01:29 -0400 Date: Mon, 16 Aug 2004 07:02:48 +0200 From: Ingo Molnar To: Lee Revell Cc: Florian Schmidt , linux-kernel , Felipe Alfaro Solana Subject: Re: [patch] voluntary-preempt-2.6.8.1-P1 Message-ID: <20040816050248.GA16522@elte.hu> References: <1092624221.867.118.camel@krustophenia.net> <20040816032806.GA11750@elte.hu> <20040816033623.GA12157@elte.hu> <1092627691.867.150.camel@krustophenia.net> <20040816034618.GA13063@elte.hu> <1092628493.810.3.camel@krustophenia.net> <20040816040515.GA13665@elte.hu> <1092630122.810.25.camel@krustophenia.net> <20040816043302.GA14979@elte.hu> <1092632236.801.1.camel@krustophenia.net> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1092632236.801.1.camel@krustophenia.net> User-Agent: Mutt/1.4.1i X-ELTE-SpamVersion: MailScanner 4.31.6-itk1 (ELTE 1.2) SpamAssassin 2.63 ClamAV 0.73 X-ELTE-VirusStatus: clean X-ELTE-SpamCheck: no X-ELTE-SpamCheck-Details: score=-4.9, required 5.9, autolearn=not spam, BAYES_00 -4.90 X-ELTE-SpamLevel: X-ELTE-SpamScore: -4 Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org * Lee Revell wrote: > > + touch_preempt_timing(); > > while ((readb(ioaddr + MIICmd) & 0x40) && --boguscnt > 0) > > ; > > + touch_preempt_timing(); > > > > assuming that the latencies still show up even if delimited like this. > > (note that this only changes the way the latency is tracked - the > > latency itself is still there so this isnt a fix.) > > > > Sure, but, what would this accomplish, if the latency is still there? > Are we just trying to track down exactly where in the network driver > this is triggered? yeah. If it's the first chunk then we could perhaps avoid it by doing it outside of the lock. Ingo