From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S965524AbXDBOYI (ORCPT ); Mon, 2 Apr 2007 10:24:08 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S965513AbXDBOYH (ORCPT ); Mon, 2 Apr 2007 10:24:07 -0400 Received: from mx2.mail.elte.hu ([157.181.151.9]:37375 "EHLO mx2.mail.elte.hu" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S965489AbXDBOYG (ORCPT ); Mon, 2 Apr 2007 10:24:06 -0400 Date: Mon, 2 Apr 2007 16:23:58 +0200 From: Ingo Molnar To: "dave_sperry@ieee.org" Cc: Dave Sperry , linux-rt-users@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: Poor UDP performance using 2.6.21-rc5-rt5 Message-ID: <20070402142358.GA32103@elte.hu> References: <040220071409.15202.46110E98000A743600003B622205886172979D9D0A9F9C0E0B@comcast.net> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <040220071409.15202.46110E98000A743600003B622205886172979D9D0A9F9C0E0B@comcast.net> User-Agent: Mutt/1.4.2.2i X-ELTE-VirusStatus: clean X-ELTE-SpamScore: -2.0 X-ELTE-SpamLevel: X-ELTE-SpamCheck: no X-ELTE-SpamVersion: ELTE 2.0 X-ELTE-SpamCheck-Details: score=-2.0 required=5.9 tests=BAYES_00 autolearn=no SpamAssassin version=3.0.3 -2.0 BAYES_00 BODY: Bayesian spam probability is 0 to 1% [score: 0.0000] Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org * dave_sperry@ieee.org wrote: > Thanks for all the input Ingo, Here's a list of all the permutations > I've tried: one thing i noticed is that cyclesoak interferes with the netperf workload. This is quite surprising. 'top' and 'vmstat' output is reliable on -rt, and the overhead goes down if i stop cyclesoak. Ingo