From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751142AbVHXQdU (ORCPT ); Wed, 24 Aug 2005 12:33:20 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751124AbVHXQdU (ORCPT ); Wed, 24 Aug 2005 12:33:20 -0400 Received: from web33305.mail.mud.yahoo.com ([68.142.206.120]:44978 "HELO web33305.mail.mud.yahoo.com") by vger.kernel.org with SMTP id S1751142AbVHXQdT (ORCPT ); Wed, 24 Aug 2005 12:33:19 -0400 DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=s1024; d=yahoo.com; h=Message-ID:Received:Date:From:Reply-To:Subject:To:Cc:In-Reply-To:MIME-Version:Content-Type:Content-Transfer-Encoding; b=fWmOpu6RMnULgLDj2nJ1uU4on7asxhgUAttc4u0/my09o9WEap6nTzl2sjxYP90CNqt1zfIhWesnIgwMKRSzMswe6qg+1jFAB9cEV8iFYKeOi+ya3rLyXvNgtSPKr13Hdd2FB9nbofu/Ia67uOePTYo79a+JeA/KxKlh4loeU1Y= ; Message-ID: <20050824163315.96541.qmail@web33305.mail.mud.yahoo.com> Date: Wed, 24 Aug 2005 09:33:15 -0700 (PDT) From: Danial Thom Reply-To: danial_thom@yahoo.com Subject: Re: 2.6.12 Performance problems To: Sven-Thorsten Dietrich Cc: linux-kernel@vger.kernel.org In-Reply-To: <1124828536.15265.160.camel@imap.mvista.com> MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7BIT Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org --- Sven-Thorsten Dietrich wrote: > On Tue, 2005-08-23 at 13:10 -0700, Danial Thom > wrote: > > > > None of this is helpful, but since no one has > > been able to tell me how to tune it to > provide > > absolute priority to the network stack I'll > > assume it can't be done. > > History has proven that camp wrong almost 100% > of the time. > > You were told to turn off kernel preemption. > > A diligent comparison requires that, since 2.4 > does not support kernel > preemption, and a fair comparison requires > holding all other things > constant. > > In addition, there were several IP-level > features mentioned in emails, > that have been added to 2.6. > > You need to make sure those are all off by > default, to keep your > comparison relevant. > > All the answers are before you, review those > emails, turn all that stuff > off and retest. I had tried turning off pre-emption, with little difference. However linux had the same properties before there was such a setting (of liking to drop packets here and there for no apparent reason under heavy load), so I didn't expect it to make a huge difference. It seems typing on the keyboard has the same effect with or without pre-emption enabled. IP is not involved in this test, so no IP stack issues should be relevent. Danial __________________________________ Yahoo! Mail for Mobile Take Yahoo! Mail with you! Check email on your mobile phone. http://mobile.yahoo.com/learn/mail