From owner-freebsd-hackers Thu Jan 3 17:42:59 2002 Delivered-To: freebsd-hackers@freebsd.org Received: from out006pub.verizon.net (out006pub.verizon.net [206.46.170.106]) by hub.freebsd.org (Postfix) with ESMTP id 06D1D37B416 for ; Thu, 3 Jan 2002 17:42:51 -0800 (PST) Received: from bellatlantic.net (pool-151-198-135-220.mad.east.verizon.net [151.198.135.220]) by out006pub.verizon.net with ESMTP ; id g041gU914703 Thu, 3 Jan 2002 19:42:30 -0600 (CST) Message-ID: <3C350880.ACC0E6D@bellatlantic.net> Date: Thu, 03 Jan 2002 20:42:24 -0500 From: Sergey Babkin Reply-To: babkin@freebsd.org X-Mailer: Mozilla 4.7 [en] (X11; U; FreeBSD 4.0-19990626-CURRENT i386) X-Accept-Language: en, ru MIME-Version: 1.0 To: Matthew Dillon Cc: Josef Karthauser , Alexander Haderer , freebsd-hackers@FreeBSD.ORG Subject: Re: FreeBSD performing worse than Linux? References: <20011128153817.T61580@monorchid.lemis.com> <15364.38174.938500.946169@caddis.yogotech.com> <20011128104629.A43642@walton.maths.tcd.ie> <5.1.0.14.1.20011130181236.00a80160@postamt1.charite.de> <200111302047.fAUKlT811090@apollo.backplane.com> <20011130231802.E99520@tao.org.uk> <200111302345.fAUNjLI27798@apollo.backplane.com> <20011228153330.A11251@tao.org.uk> <200112300644.fBU6iVG10959@apollo.backplane.com> <20011230182612.D5642@tao.org.uk> <200112301917.fBUJHdm13120@apollo.backplane.com> Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Sender: owner-freebsd-hackers@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.ORG Matthew Dillon wrote: > > : > :No switching infrastructure. It's a 10mb/s half duplex ethernet > :network, with two hubs between the two machines. > : > :Joe > > I think there may be a problem with your hub setup (e.g. exceeding the > hub count or end-to-end length limitations) that is either resulting > in packet loss, or the packet burst is locking up the ethernet long > enough to cause a timeout. The problem looks very much like an > unrecognized collision to me. > > I recommend replacing the hubs with switches. The whole topology will > be happier. Or maybe just with better hubs. I've seen cheap hubs that started losing packets when the load went above ~5MB/s. -SB To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message