From owner-freebsd-hackers@FreeBSD.ORG Wed Jul 9 13:34:14 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 273E937B401 for ; Wed, 9 Jul 2003 13:34:14 -0700 (PDT) Received: from mail.cyberonic.com (mail.cyberonic.com [4.17.179.4]) by mx1.FreeBSD.org (Postfix) with ESMTP id 38C5843F75 for ; Wed, 9 Jul 2003 13:34:13 -0700 (PDT) (envelope-from jmg@hydrogen.funkthat.com) Received: from hydrogen.funkthat.com (node-40244c0a.sfo.onnet.us.uu.net [64.36.76.10]) by mail.cyberonic.com (8.12.8/8.12.5) with ESMTP id h69KxdIv003402; Wed, 9 Jul 2003 16:59:39 -0400 Received: (from jmg@localhost) by hydrogen.funkthat.com (8.12.9/8.11.6) id h69KYKGA014600; Wed, 9 Jul 2003 13:34:20 -0700 (PDT) (envelope-from jmg) Date: Wed, 9 Jul 2003 13:34:20 -0700 From: John-Mark Gurney To: Max Clark Message-ID: <20030709203420.GW44762@funkthat.com> Mail-Followup-To: Max Clark , Dan Nelson , freebsd-hackers@freebsd.org References: <20030709202100.GN39506@dan.emsphone.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.4.1i X-Operating-System: FreeBSD 4.2-RELEASE i386 X-PGP-Fingerprint: B7 EC EF F8 AE ED A7 31 96 7A 22 B3 D8 56 36 F4 X-Files: The truth is out there X-URL: http://resnet.uoregon.edu/~gurney_j/ X-Resume: http://resnet.uoregon.edu/~gurney_j/resume.html cc: freebsd-hackers@freebsd.org cc: Dan Nelson 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 Reply-To: John-Mark Gurney 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 20:34:14 -0000 Max Clark wrote this message on Wed, Jul 09, 2003 at 13:27 -0700: > :) hehe... > > Okay, let's say how do I force my machine to think it doesn't have any > latency and saturate a 6Mbit/s link even though the link has 220ms latency? You might want to try: net.inet.tcp.sendspace=$((128*1024)) net.inet.tcp.inflight_min=$((64*1024)) net.inet.tcp.inflight_enable=1 Try to increase inflight_min if necessary. Of course this will effect all sending data to this box, so it might have other negative effects. > -----Original Message----- > From: Dan Nelson [mailto:dnelson@allantgroup.com] > Sent: Wednesday, July 09, 2003 1:21 PM > 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: > > Assuming zero (0) network latency what should I configure on my > > FreeBSD boxes to saturate a 6Mbit/s (750Kbyte/s) link? > > Assuming zero latency, absolutely nothing :) You can easily saturate a > 100mbit LAN connection (which has like a 12K bw*d product) even with > IDE disks. Latency and packetloss are the killers. > > -- > Dan Nelson > dnelson@allantgroup.com > > _______________________________________________ > freebsd-hackers@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-hackers > To unsubscribe, send any mail to "freebsd-hackers-unsubscribe@freebsd.org" -- John-Mark Gurney Voice: +1 415 225 5579 "All that I will do, has been done, All that I have, has not."