From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S267799AbUHXNtK (ORCPT ); Tue, 24 Aug 2004 09:49:10 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S267838AbUHXNtJ (ORCPT ); Tue, 24 Aug 2004 09:49:09 -0400 Received: from mail3.utc.com ([192.249.46.192]:33954 "EHLO mail3.utc.com") by vger.kernel.org with ESMTP id S267799AbUHXNtG (ORCPT ); Tue, 24 Aug 2004 09:49:06 -0400 Message-ID: <412B4736.4040706@cybsft.com> Date: Tue, 24 Aug 2004 08:48:38 -0500 From: "K.R. Foley" Organization: Cybersoft Solutions, Inc. 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 Subject: Re: [patch] voluntary-preempt-2.6.8.1-P8 References: <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> <20040823210151.GA10949@elte.hu> <1093312154.862.17.camel@krustophenia.net> <20040824054128.GA29027@elte.hu> <1093326406.817.7.camel@krustophenia.net> In-Reply-To: <1093326406.817.7.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 Tue, 2004-08-24 at 01:41, Ingo Molnar wrote: > >>* Lee Revell wrote: >> >> >>>> - reduce netdev_max_backlog to 8 (Mark H Johnson) >>> >>>On my system this setting has absolutely no effect on the skb related >>>latencies. [...] >> >>it has an effect on input queue length. Output queue lengths can be >>reduced via 'ifconfig eth0 txqueuelen 8'. >> > > > OK. With both of these set to 4, the largest latency I was able to > generate by ping flooding was 253 usecs. > Even with both of these set to 4, I still get similar results ~647 usec :(