From owner-freebsd-stable@FreeBSD.ORG Thu Feb 18 16:28:18 2010 Return-Path: Delivered-To: freebsd-stable@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id E9E06106568B for ; Thu, 18 Feb 2010 16:28:17 +0000 (UTC) (envelope-from amvandemore@gmail.com) Received: from mail-vw0-f54.google.com (mail-vw0-f54.google.com [209.85.212.54]) by mx1.freebsd.org (Postfix) with ESMTP id 9622A8FC12 for ; Thu, 18 Feb 2010 16:28:17 +0000 (UTC) Received: by vws14 with SMTP id 14so769436vws.13 for ; Thu, 18 Feb 2010 08:28:16 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:mime-version:received:in-reply-to:references :date:message-id:subject:from:to:cc:content-type; bh=tuyhyU+kb7b0d/cKm9yu2O/CodbT9yvHCptMOciDAQo=; b=HOkRsuphS15Vfl15+m/MDJa0McWxE6hjgmRNeN0pE6m16BhsdwJJJEsF/w0YAt150a hl9JrnNwGd1MAEOtNHJV8GdH4Nhrv3L0gDYzVp5o3rK3C2ZOdcqOyXpSCP8vPOLlrLrU z+9TbIXdLFIar0KcOPwy4LgZ0dUwIRM9j57to= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :cc:content-type; b=LaeV1IGUUstScY7UuxXTp55KwCbuY6ipdegpx5QQ2a8VEovXTJ+bOFKScwnZpdoQl4 eniFrR8mRfk1/CrXyQSBfuCVhV6nmg/YAPG7np2M6Mm3H5vmL1+lQ9IQX3mLvX9Ci+BB OfZBqsXv8h4UmAjBHecjPPlUznm1USjwV/XY4= MIME-Version: 1.0 Received: by 10.142.8.32 with SMTP id 32mr1765815wfh.161.1266510495752; Thu, 18 Feb 2010 08:28:15 -0800 (PST) In-Reply-To: <4B7D69A5.4010506@omnilan.de> References: <4B7C1365.9070806@omnilan.de> <70CD649D-7659-4CE2-A16C-49B8C891CB5B@mac.com> <4B7C4066.5040006@omnilan.de> <4B7D3938.1000309@omnilan.de> <4B7D5AC4.9020509@mahan.org> <4B7D61DE.2020906@omnilan.de> <4B7D6635.20605@sasktel.net> <4B7D69A5.4010506@omnilan.de> Date: Thu, 18 Feb 2010 10:28:15 -0600 Message-ID: <6201873e1002180828y406dca32k30ef64c05d1f7640@mail.gmail.com> From: Adam Vande More To: Harald Schmalzbauer Content-Type: text/plain; charset=ISO-8859-1 X-Content-Filtered-By: Mailman/MimeDel 2.1.5 Cc: Patrick Mahan , freebsd-stable@freebsd.org, Stephen Hurd Subject: Re: RELENG_8 ignoring TCP window size? [Was: Re: Help for TCP understanding wanted, ACK-MSS-Window [Was: Re: best practice to watch TCP parms of established sockets]] X-BeenThere: freebsd-stable@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Production branch of FreeBSD source code List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 18 Feb 2010 16:28:18 -0000 On Thu, Feb 18, 2010 at 10:24 AM, Harald Schmalzbauer < h.schmalzbauer@omnilan.de> wrote: > The problem is not with the windows box, these transfer rates are sensible. > The problem is with two RELENG_8 machines. > > I'm doing this whole thing because I observed slowdowns under 20MB/s and I > try to reproduce and investigate this. But first I have to get the idea > right... If I don't understamd things going on when transfers make sense, I > won't be able to determine what happens when transfers are slowed down... > Have you considered the possibility it's not a tcp issue at all, maybe a nic driver? -- Adam Vande More