Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S262805AbTFDEeO (ORCPT ); Wed, 4 Jun 2003 00:34:14 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S262811AbTFDEeO (ORCPT ); Wed, 4 Jun 2003 00:34:14 -0400 Received: from e32.co.us.ibm.com ([32.97.110.130]:51189 "EHLO e32.co.us.ibm.com") by vger.kernel.org with ESMTP id S262805AbTFDEeN (ORCPT ); Wed, 4 Jun 2003 00:34:13 -0400 Message-ID: <3EDD7832.7010804@us.ibm.com> Date: Tue, 03 Jun 2003 21:40:18 -0700 From: Nivedita Singhvi User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.0; en-US; rv:1.2.1) Gecko/20021130 X-Accept-Language: en-us, en MIME-Version: 1.0 To: davidm@hpl.hp.com CC: "David S. Miller" , kuznet@ms2.inr.ac.ru, jmorris@intercode.com.au, gandalf@wlug.westbo.se, linux-kernel@vger.kernel.org, linux-ia64@linuxia64.org, netdev@oss.sgi.com, akpm@digeo.com Subject: Re: fix TCP roundtrip time update code References: <200306040043.EAA24505@dub.inr.ac.ru> <3EDD52F5.8090706@us.ibm.com> <20030603.202320.59680883.davem@redhat.com> <16093.30507.661714.676184@napali.hpl.hp.com> In-Reply-To: <16093.30507.661714.676184@napali.hpl.hp.com> 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 Content-Length: 1201 Lines: 32 David Mosberger wrote: > DaveM> So if your old SpecWEB99 lab tended more to trigger timeout > DaveM> based retransmits on LAN, and your new test network does not, > DaveM> then your new test network will tend to not reproduce the bug > DaveM> regardless of whether the bug is present in the kernel or not > DaveM> :-) > > Is this where I get to plug httperf? It triggered the bug reliably in > less than 10 secs. ;-) Tarnation!! Ran httperf! Didnt hit it! :(. What were your settings? I extracted an old debug patch to implement dropping of packets - have a sysctl that controls the rate at which I can drop IP packets, so can also generate any kind of packet loss..So thought I would bang away with netperf using sendfile()/TCP_CORK. Thought it was in that code path. Will be running tests tmrw and the rest of this week on 2.5.70 +- patch. Will see if I can provoke any further hangs, stalls, wackiness of any flavor... thanks, Nivedita - 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/