From owner-freebsd-net@FreeBSD.ORG Wed Dec 17 06:35:15 2003 Return-Path: Delivered-To: freebsd-net@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 4682616A4CE for ; Wed, 17 Dec 2003 06:35:15 -0800 (PST) Received: from bilver.wjv.com (user38.net339.fl.sprint-hsd.net [65.40.24.38]) by mx1.FreeBSD.org (Postfix) with ESMTP id 16E9B43D5E for ; Wed, 17 Dec 2003 06:35:06 -0800 (PST) (envelope-from bv@bilver.wjv.com) Received: from bilver.wjv.com (localhost.wjv.com [127.0.0.1]) by bilver.wjv.com (8.12.10/8.12.10) with ESMTP id hBHEYqm7069212 for ; Wed, 17 Dec 2003 09:34:52 -0500 (EST) (envelope-from bv@bilver.wjv.com) Received: (from bv@localhost) by bilver.wjv.com (8.12.10/8.12.10/Submit) id hBHEYqoI069211 for freebsd-net@freebsd.org; Wed, 17 Dec 2003 09:34:52 -0500 (EST) (envelope-from bv) Date: Wed, 17 Dec 2003 09:34:52 -0500 From: Bill Vermillion To: freebsd-net@freebsd.org Message-ID: <20031217143452.GD68467@wjv.com> References: <5099DCD8-301B-11D8-A624-000A95775140@battleface.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <5099DCD8-301B-11D8-A624-000A95775140@battleface.com> Organization: W.J.Vermillion / Orlando - Winter Park ReplyTo: bv@wjv.com User-Agent: Mutt/1.5.5.1i X-Spam-Status: No, hits=0.0 required=5.0 tests=none autolearn=no version=2.60 X-Spam-Checker-Version: SpamAssassin 2.60 (1.212-2003-09-23-exp) on bilver.wjv.com Subject: Re: suffering from poor network performance... X-BeenThere: freebsd-net@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list Reply-To: bv@wjv.com List-Id: Networking and TCP/IP with FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 17 Dec 2003 14:35:15 -0000 On Tue, Dec 16, 2003 at 17:58 , while impersonating an expert on the internet, Alex sent this to stdout: > First, I know very little about networking, especially > performance turning. I would really like to learn more but don't > know where/how to start effectively. > I have a small home network with a PowerBook G4 and FBSD > 4.9-STABLE connected through a Netgear DS108 hub (10/100). The > FBSD box is a dual Xeon 500MHz with Intel Etherexpress 100/Pro > (MS440GX motherboard). If for some reason it makes a difference, > there is an RT311 router connected to the hub as well. This is > the router through which these machines see the internet. There > are other machines connected to the network. However, they are > currently turned off. > In my limited knowledge I'm using ping from each host to the > other. From the FBSD system to the G4 system, I'm getting nearly > 60% packet loss and about 20% in the other direction. I'm ready > to use tcpdump but I'm not sure how I would. How can/should I go > about improving network performance? I've not tried the ping but I'm seeing exceptionally poor performance on G4s to FreeBSD. The G4's can ftp to each other at about 8-9MB/sec, as can the FreeBSDs. They are on a Cisco 2948 switch. But ftp from BSD to G4 is in the order of 20-40KB/sec while G4 to FreeBSD is about 1/2 that. This was first noted by a client who has a G4 in our rack and have a very large flash file on their front page. I've also heard annecdotal reports of slow G4 to MS machines too. But not everyone has this and I can't seem to find an answer. And I have NO problems with pings. Just data transfer. One G4 runs high load as shown under very little CPU available under top, while the other is far less stressed. Bill -- Bill Vermillion - bv @ wjv . com