From owner-freebsd-questions@FreeBSD.ORG Thu May 27 03:26:08 2004 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 2C2DA16A4CE for ; Thu, 27 May 2004 03:26:08 -0700 (PDT) Received: from imo-d02.mx.aol.com (imo-d02.mx.aol.com [205.188.157.34]) by mx1.FreeBSD.org (Postfix) with ESMTP id 9E3ED43D2D for ; Thu, 27 May 2004 03:26:07 -0700 (PDT) (envelope-from kantsg@netscape.net) Received: from kantsg@netscape.net by imo-d02.mx.aol.com (mail_out_v37_r1.3.) id n.1c.d64ac87 (16237) for ; Thu, 27 May 2004 06:25:26 -0400 (EDT) Received: from netscape.net ([203.196.221.154]) by air-in03.mx.aol.com (v99_r4.3) with ESMTP id MAILININ31-3f6d40b5c211372; Thu, 27 May 2004 06:25:25 -0400 Message-ID: <40B5C351.802@netscape.net> Date: Thu, 27 May 2004 16:00:41 +0530 From: "T. Srikanth" User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.0; en-US; rv:1.4) Gecko/20030624 Netscape/7.1 (ax) X-Accept-Language: en-us, en MIME-Version: 1.0 To: freebsd-questions@freebsd.org X-AOL-IP: 203.196.221.154 X-Mailer: Unknown (No Version) Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit X-Content-Filtered-By: Mailman/MimeDel 2.1.1 Subject: Re: Router take advantage of device polling X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 27 May 2004 10:26:08 -0000 Jeffrey, Yes, there is. At a certain level of traffic, network interrupts happen all too often to justify the processing overhead associated with the interrupt service routines, and hence the network activity is best polled. Is 15Mbps the level for enabling polling? Well, this traffic level depends on the underlying hardware capabilities as well. You decide. --Srikanth Jeffrey Lyon wrote: I am currently running a router pushing about 15 megabit of traffic, with CPU usage like so: root 25 5.9 0.0 0 12 ?? WL 10:16AM 47:49.70 (irq7: bge0 amr0) root 14 5.9 0.0 0 12 ?? WL 10:16AM 55:15.63 (swi1: net) root 26 3.0 0.0 0 12 ?? LL 10:16AM 28:42.81 (irq5: bge1) I am told that activating the device_polling kernel option will cause a substantial reduction in this usage. Is there any truth to that statement? Thanks. -- Jeffrey Lyon, Independent Associate jeffreylyon at prepaidlegal.com http://www.prepaidlegal.com/hub/jeffreylyon Pre-Paid Legal Services, Inc.