From owner-freebsd-hackers@FreeBSD.ORG Wed Jul 9 11:22:59 2003 Return-Path: Delivered-To: freebsd-hackers@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id DF11537B405 for ; Wed, 9 Jul 2003 11:22:59 -0700 (PDT) Received: from Chow.corp.media.net (rottie.media.net [66.113.65.4]) by mx1.FreeBSD.org (Postfix) with ESMTP id 170C443FA3 for ; Wed, 9 Jul 2003 11:22:55 -0700 (PDT) (envelope-from max.clark@media.net) Received: from MCLARK (76.0.6.10.IN-ADDR.ARPA [10.6.0.76]) by Chow.corp.media.net (Netscape Messaging Server 4.15) with SMTP id HHRS7900.CDG; Wed, 9 Jul 2003 11:18:45 -0700 From: "Max Clark" To: "Dan Nelson" Date: Wed, 9 Jul 2003 11:27:19 -0700 Message-ID: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook IMO, Build 9.0.2416 (9.0.2911.0) In-Reply-To: <20030709181859.GH39506@dan.emsphone.com> X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1165 Importance: Normal cc: freebsd-hackers@freebsd.org Subject: RE: What ever happened with this? "eXperimental bandwidth delay product code" X-BeenThere: freebsd-hackers@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: Technical Discussions relating to FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 09 Jul 2003 18:23:00 -0000 Fantastic, this is exactly what I was looking for. When you say it's got a specific purpose, I am looking for something that will dynamically tune a 6Mbit/s, 220ms network link for bulk (500MB) file transfers. Is this what I think it is, or should I be looking at something else? Thanks in advance, Max -----Original Message----- From: Dan Nelson [mailto:dnelson@allantgroup.com] Sent: Wednesday, July 09, 2003 11:19 AM To: Max Clark Cc: freebsd-hackers@freebsd.org Subject: Re: What ever happened with this? "eXperimental bandwidth delay product code" In the last episode (Jul 09), Max Clark said: > Hi all, > > I am doing research on dynamic tcp tunning, what ever happened with the > patch below? > > http://groups.google.com/groups?hl=en&lr=&ie=UTF-8&oe=UTF-8&safe=off&selm=20 0107150943.f6F9hhx06763%40earth.backplane.com&rnum=1 It got commited to 4.x and 5.x in August 2002; the sysctls were renamed to net.inet.tcp.inflight_debug, inflight_enable, and inflight_min. They're documented in the tcp(4) manpage. Note that it's got a specific purpose; you don't want to turn this on by default as it will lower the throughput of individual TCP streams to prevent backlogs and packet loss. -- Dan Nelson dnelson@allantgroup.com