From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S261752AbULGDYq (ORCPT ); Mon, 6 Dec 2004 22:24:46 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S261751AbULGDYq (ORCPT ); Mon, 6 Dec 2004 22:24:46 -0500 Received: from quickstop.soohrt.org ([81.2.155.147]:33480 "EHLO quickstop.soohrt.org") by vger.kernel.org with ESMTP id S261750AbULGDYn (ORCPT ); Mon, 6 Dec 2004 22:24:43 -0500 Date: Tue, 7 Dec 2004 04:24:38 +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: <20041207032438.GA7767@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> Mime-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Disposition: inline In-Reply-To: <1102389533.1089.51.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: > > The only thing I can think off is the 66/64 PCI bus and the > > disadvantageous placement of the PCI cards, but neither should cause a > > higher CPU usage. If the bus couldn't keep up, I'd get packetloss. > > > > cant tell offhand; it looks like a modern piece of hardware. > Are you sure you are using NAPI? This is an e1000, correct? > Yes and yes. 0000:01:01.0 Ethernet controller: Intel Corp. 82545EM Gigabit Ethernet Controller (Fiber) (rev 01) 0000:01:03.0 Ethernet controller: Intel Corp. 82546GB Gigabit Ethernet Controller (rev 03) driver: e1000 version: 5.5.4-k2-NAPI firmware-version: N/A bus-info: 0000:01:03.0 driver: e1000 version: 5.5.4-k2-NAPI firmware-version: N/A bus-info: 0000:01:01.0