From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S265487AbUHVCWe (ORCPT ); Sat, 21 Aug 2004 22:22:34 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S265398AbUHVCWd (ORCPT ); Sat, 21 Aug 2004 22:22:33 -0400 Received: from relay.pair.com ([209.68.1.20]:40465 "HELO relay.pair.com") by vger.kernel.org with SMTP id S265487AbUHVCWS (ORCPT ); Sat, 21 Aug 2004 22:22:18 -0400 X-pair-Authenticated: 66.190.51.173 Message-ID: <41280355.8040109@cybsft.com> Date: Sat, 21 Aug 2004 21:22:13 -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: Lee Revell CC: Ingo Molnar , linux-kernel , Florian Schmidt Subject: Re: [patch] voluntary-preempt-2.6.8.1-P7 References: <1092628493.810.3.camel@krustophenia.net> <20040816040515.GA13665@elte.hu> <1092654819.5057.18.camel@localhost> <20040816113131.GA30527@elte.hu> <20040816120933.GA4211@elte.hu> <1092716644.876.1.camel@krustophenia.net> <20040817080512.GA1649@elte.hu> <20040819073247.GA1798@elte.hu> <20040820133031.GA13105@elte.hu> <20040820195540.GA31798@elte.hu> <20040821140501.GA4189@elte.hu> <1093125390.817.22.camel@krustophenia.net> <4127E386.5000701@cybsft.com> <1093133810.817.26.camel@krustophenia.net> In-Reply-To: <1093133810.817.26.camel@krustophenia.net> 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 Lee Revell wrote: > On Sat, 2004-08-21 at 20:06, K.R. Foley wrote: > >>I just posted a similar trace of ~4141 usec from P6 here: >> >>http://www.cybsft.com/testresults/2.6.8.1-P6/latency-trace1.txt >> > > > This looks wrong: > > 00000003 0.008ms (+0.001ms): dummy_socket_sock_rcv_skb (tcp_v4_rcv) > 00000004 0.008ms (+0.000ms): tcp_v4_do_rcv (tcp_v4_rcv) > 00000004 0.009ms (+0.000ms): tcp_rcv_established (tcp_v4_do_rcv) > 00010004 3.998ms (+3.989ms): do_IRQ (tcp_rcv_established) > 00010005 3.999ms (+0.000ms): mask_and_ack_8259A (do_IRQ) > 00010005 4.001ms (+0.002ms): generic_redirect_hardirq (do_IRQ) > 00010004 4.002ms (+0.000ms): generic_handle_IRQ_event (do_IRQ) > > Probably a false positive, Ingo would know better. What kind of stress > testing were you doing? > > Lee > This is while running the stress-kernel suite. I don't know about it being a false possitive, it very well may be. Looking back through the logs though I am not sure this is a valid latency anyway. This trace was from 06:37 this morning. About 19:54 last night I got an oops in kswapd and this morning around 10:30ish I had stuff getting killed right and left by oom. So, I am thinking that this probably is not a very reliable test. kr