From owner-freebsd-net@FreeBSD.ORG Mon Feb 1 07:51:24 2010 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 203CD1065676 for ; Mon, 1 Feb 2010 07:51:24 +0000 (UTC) (envelope-from eberkut@minithins.net) Received: from cns.minithins.net (minithins.net [88.191.84.127]) by mx1.freebsd.org (Postfix) with ESMTP id D64378FC0C for ; Mon, 1 Feb 2010 07:51:23 +0000 (UTC) Received: from localhost (localhost [127.0.0.1]) by cns.minithins.net (Postfix) with ESMTP id 5F7D68E43D8; Mon, 1 Feb 2010 08:31:35 +0100 (CET) X-Virus-Scanned: Debian amavisd-new at cns.minithins.net Received: from cns.minithins.net ([127.0.0.1]) by localhost (cns.minithins.net [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id lllzFLsYuYkq; Mon, 1 Feb 2010 08:31:34 +0100 (CET) Received: from [192.168.1.102] (eberkut.net1.nerim.net [213.41.155.24]) by cns.minithins.net (Postfix) with ESMTPSA id A6C8E8E43D7; Mon, 1 Feb 2010 08:31:34 +0100 (CET) Mime-Version: 1.0 (Apple Message framework v1077) Content-Type: text/plain; charset=iso-8859-1 From: eberkut In-Reply-To: <86068e731001311449m605005cft7ebc6f8b984d6d96@mail.gmail.com> Date: Mon, 1 Feb 2010 08:31:32 +0100 Content-Transfer-Encoding: quoted-printable Message-Id: <1750BC6A-DCD0-4063-A1B4-34AEFF0B0BF8@minithins.net> References: <86068e731001311449m605005cft7ebc6f8b984d6d96@mail.gmail.com> To: Jerry Toung X-Mailer: Apple Mail (2.1077) Cc: freebsd-net@freebsd.org Subject: Re: TCP westwood 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: Mon, 01 Feb 2010 07:51:24 -0000 Le 31 janv. 2010 =E0 23:49, Jerry Toung a =E9crit : > Hello list, > my employer is asking me to implement westwood, this is most likely = happen > on 8.0. >=20 > before I start, I'd like to know for what reason it hasn't been done = in the > main tree? > is it that no one has had time, or it only work in a lab environment? = may be > too many changes in the stack > and it's not trivial? etc... I have no idea why it wasn't implemented before except maybe simply for = lack of interest. Two years ago, I remember there was some discussion about a modular TCP = congestion control framework in FreeBSD to ease the introduction of new = CC algorithms. It was among the big TCP overhaul going on then with some = part committed in 8.0. There is a branch dedicated to this project but I = have no idea if it's still active : = http://svn.freebsd.org/viewvc/base/projects/tcp_cc_8.x/ You might want to contact Lawrence Stewart (lstewart@freebsd.org), Andre = Oppermann (andre@) and/or Rui Paulo (rpaulo@). They might have patches = that could help you or at least they can give you some pointers. Good luck, -- Vincent Morel=