From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S261757AbULGECm (ORCPT ); Mon, 6 Dec 2004 23:02:42 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S261756AbULGECl (ORCPT ); Mon, 6 Dec 2004 23:02:41 -0500 Received: from quickstop.soohrt.org ([81.2.155.147]:40904 "EHLO quickstop.soohrt.org") by vger.kernel.org with ESMTP id S261755AbULGECk (ORCPT ); Mon, 6 Dec 2004 23:02:40 -0500 Date: Tue, 7 Dec 2004 05:02:35 +0100 From: Karsten Desler To: jamal Cc: Bernd Eckenfels , "David S. Miller" , netdev@oss.sgi.com, linux-kernel@vger.kernel.org Subject: Re: _High_ CPU usage while routing (mostly) small UDP packets Message-ID: <20041207040235.GA10501@soohrt.org> References: <20041206224107.GA8529@soohrt.org> <20041207002012.GB30674@quickstop.soohrt.org> <1102387595.1088.48.camel@jzny.localdomain> <20041207025456.GA525@soohrt.org> <1102389533.1089.51.camel@jzny.localdomain> <20041207032438.GA7767@soohrt.org> <1102390241.1093.59.camel@jzny.localdomain> Mime-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Disposition: inline In-Reply-To: <1102390241.1093.59.camel@jzny.localdomain> User-Agent: Mutt/1.5.6+20040722i Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org * jamal wrote: > Beats me. Make sure it boots NAPI. Also if you can turn off ITR; intel > loves to turn on that silly feature. ITR was in fact activated. I think i've disabled it now (e1000.InterruptThrottleRate=0 in the kernel cmdline). And as I'm reading the e1000 code, there is no way to enable/disable NAPI without a recompile. So the fact that ethtool spat out -NAPI in the version string means that NAPI is actually used. - Karsten