From owner-freebsd-questions@FreeBSD.ORG Sun Sep 11 13:42:41 2005 Return-Path: X-Original-To: freebsd-questions@freebsd.org 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 1D81E16A41F for ; Sun, 11 Sep 2005 13:42:41 +0000 (GMT) (envelope-from freebsd-questions-local@be-well.ilk.org) Received: from mail23.sea5.speakeasy.net (mail23.sea5.speakeasy.net [69.17.117.25]) by mx1.FreeBSD.org (Postfix) with ESMTP id BCF9743D45 for ; Sun, 11 Sep 2005 13:42:40 +0000 (GMT) (envelope-from freebsd-questions-local@be-well.ilk.org) Received: (qmail 5011 invoked from network); 11 Sep 2005 13:42:40 -0000 Received: from dsl092-078-145.bos1.dsl.speakeasy.net (HELO be-well.ilk.org) ([66.92.78.145]) (envelope-sender ) by mail23.sea5.speakeasy.net (qmail-ldap-1.03) with SMTP for ; 11 Sep 2005 13:42:40 -0000 Received: by be-well.ilk.org (Postfix, from userid 1147) id 49BA02F; Sun, 11 Sep 2005 09:42:39 -0400 (EDT) Sender: lowell@be-well.ilk.org To: "Jan-Peter Koopmann" To: References: From: Lowell Gilbert Date: 11 Sep 2005 09:42:38 -0400 In-Reply-To: Message-ID: <44ek7vyb3l.fsf@be-well.ilk.org> Lines: 36 User-Agent: Gnus/5.09 (Gnus v5.9.0) Emacs/21.3 MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Cc: Subject: Re: Slow transfers to 5.4 / 4.11 is ok X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list Reply-To: freebsd-questions@freebsd.org List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 11 Sep 2005 13:42:41 -0000 "Jan-Peter Koopmann" writes: > we are experiencing a very strange problem. All transfers from > Windows XP boxes to our new FreeBSD 5.4 installation seem to be > quite slow. The 5.4 is located in a housing center and we try to > access it from behind 3MBit DSL lines. Instead of the expected > ~320KByte/sec we only get 220KByte/sec. If I use a FreBSD, OSX or > linux machine behind the same router to download stuff from our 5.4 > machine, everything is in perfect order. If I access 4.11 > installations from the same Windows XP machines, everything is fine > as well: > > Linux -> 5.4: ~320K > FreeBSD 4 -> 5.4: ~320K > Windows XP -> 5.4: ~220K > Windows XP -> 4.x: ~320K > > Prior to the 5.4 box we had a 4.11 machine at the same location, > same routers clients etc. Again: Until we changed the box download > speed were ok. MTU etc. seem to be correct as well. This also > happens from several locations with different setups, providers > etc. always with the results shown above. So we are pretty confident > that some change between 4.X and 5.4 breaks the transfer rates when > it comes to Windows XP. > > Do any of you have an idea where we could/should look for? Are there any timing issues corrected/changed in 5.X? What protocols are you using? NIC cards? Are you seeing collisions? What is the overall utilization of the links involved? -- Lowell Gilbert, embedded/networking software engineer, Boston area http://be-well.ilk.org/~lowell/