From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S268359AbUHYDRv (ORCPT ); Tue, 24 Aug 2004 23:17:51 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S268406AbUHYDRu (ORCPT ); Tue, 24 Aug 2004 23:17:50 -0400 Received: from relay.pair.com ([209.68.1.20]:40969 "HELO relay.pair.com") by vger.kernel.org with SMTP id S268359AbUHYDRs (ORCPT ); Tue, 24 Aug 2004 23:17:48 -0400 X-pair-Authenticated: 66.190.51.173 Message-ID: <412C04DB.9000508@cybsft.com> Date: Tue, 24 Aug 2004 22:17:47 -0500 From: "K.R. Foley" User-Agent: Mozilla Thunderbird 0.7.3 (X11/20040803) X-Accept-Language: en-us, en MIME-Version: 1.0 To: Ingo Molnar CC: Scott Wood , manas.saksena@timesys.com, linux-kernel@vger.kernel.org Subject: Re: [patch] voluntary-preempt-2.6.8.1-P9 References: <20040823221816.GA31671@yoda.timesys> <20040824061459.GA29630@elte.hu> In-Reply-To: <20040824061459.GA29630@elte.hu> X-Enigmail-Version: 0.85.0.0 X-Enigmail-Supports: pgp-inline, pgp-mime Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Ingo Molnar wrote: > * Scott Wood wrote: > > >>I have attached a port of the voluntary preempt patch to PPC and >>PPC64. The patch is against P7, but it applies against P8 as well. > > > thanks Scott, i've applied your patch to my tree - all the changes and > improvements look good (except for a small compilation problem on x86, > asm/time.h doesnt exist there - asm/rtc.h does). The resulting code > booted fine on an SMP and on a UP x86 system. I've uploaded -P9: > > http://redhat.com/~mingo/voluntary-preempt/voluntary-preempt-2.6.8.1-P9 > > (there are no other changes in -P9.) > > Ingo latency trace of ~148 usec in scsi_request? I don't know if this is real or not. Note the 79 usec here: 00000001 0.107ms (+0.079ms): sd_init_command (scsi_prep_fn) Entire trace is here: http://www.cybsft.com/testresults/2.6.8.1-P9/latency_trace7.txt Is this possible? This is not the first time I have seen this. There is another one here: http://www.cybsft.com/testresults/2.6.8.1-P9/latency_trace5.txt kr