From owner-freebsd-net@FreeBSD.ORG Tue Sep 29 18:07:55 2009 Return-Path: Delivered-To: freebsd-net@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id E11B2106566C for ; Tue, 29 Sep 2009 18:07:55 +0000 (UTC) (envelope-from dougb@FreeBSD.org) Received: from mail2.fluidhosting.com (mx21.fluidhosting.com [204.14.89.4]) by mx1.freebsd.org (Postfix) with ESMTP id 7D9568FC0C for ; Tue, 29 Sep 2009 18:07:55 +0000 (UTC) Received: (qmail 11502 invoked by uid 399); 29 Sep 2009 18:07:54 -0000 Received: from localhost (HELO foreign.dougb.net) (dougb@dougbarton.us@127.0.0.1) by localhost with ESMTPAM; 29 Sep 2009 18:07:54 -0000 X-Originating-IP: 127.0.0.1 X-Sender: dougb@dougbarton.us Message-ID: <4AC24CF9.5090207@FreeBSD.org> Date: Tue, 29 Sep 2009 11:07:53 -0700 From: Doug Barton Organization: http://www.FreeBSD.org/ User-Agent: Thunderbird 2.0.0.23 (X11/20090822) MIME-Version: 1.0 To: Matthias Apitz References: <20090928120734.GA3669@current.Sisis.de> In-Reply-To: <20090928120734.GA3669@current.Sisis.de> X-Enigmail-Version: 0.96.0 OpenPGP: id=D5B2F0FB Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Cc: freebsd-net@freebsd.org Subject: Re: WLAN performance Windows/XP ./. FreeBSD 8-CURRENT X-BeenThere: freebsd-net@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Networking and TCP/IP with FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 29 Sep 2009 18:07:56 -0000 Matthias Apitz wrote: > Hello, > > I am wondering what could cause the following WLAN performance diff > between a XP and 8-CURRENT laptop, sitting side by side and connected to > the same AP: > > OS XP 8-CURRENT > NIC Intel 3945ABG Atheros 5424/2424 > Ping 6ms 116ms > downstream 9.05Mbit/s 6.58Mbit/s > upstream 6.58Mbit/s 4.55Mbit/s > > measured with http://www.speedtest.net/ against the same remote server > at the same time... Any ideas? Since you asked the question in the most generic way possible, here are some generic answers: 1. Different hardware a. Different wlan cards (as you pointed out) b. Different laptops c. Different harddrives 2. Different speedtests (java, flash, etc.) 3. Different protocols (802.11[abg]) 4. Different settings on the wlan cards (beacons, etc.) 5. Some sort of preference settings (user-visible or not) on the AP that prefers one card over the other In other words, you haven't given us nearly enough information to determine anything useful. hope this helps, Doug -- This .signature sanitized for your protection