From owner-freebsd-net Fri Nov 1 11:28:15 2002 Delivered-To: freebsd-net@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id BB7FB37B401 for ; Fri, 1 Nov 2002 11:28:13 -0800 (PST) Received: from seraph2.grc.nasa.gov (seraph2.lerc.nasa.gov [128.156.10.11]) by mx1.FreeBSD.org (Postfix) with ESMTP id 4A28F43E77 for ; Fri, 1 Nov 2002 11:28:13 -0800 (PST) (envelope-from mallman@guns.lerc.nasa.gov) Received: from lombok-fi.lerc.nasa.gov (lombok-fi.lerc.nasa.gov [139.88.112.33]) by seraph2.grc.nasa.gov (Postfix) with ESMTP id D6A9FC6A16 for ; Fri, 1 Nov 2002 14:28:12 -0500 (EST) Received: from guns.lerc.nasa.gov (guns.lerc.nasa.gov [139.88.87.35]) by lombok-fi.lerc.nasa.gov (NASA GRC 8.12.3/8.12.3) with ESMTP id gA1JSCwg010805; Fri, 1 Nov 2002 14:28:12 -0500 (EST) Received: from guns.lerc.nasa.gov (localhost.lerc.nasa.gov [127.0.0.1]) by guns.lerc.nasa.gov with ESMTP (NASA LeRC 8.7.4.1/2.01-local) id OAA63524; Fri, 1 Nov 2002 14:28:11 -0500 (EST) Message-Id: <200211011928.OAA63524@guns.lerc.nasa.gov> To: rick norman From: Mark Allman Reply-To: mallman@grc.nasa.gov Cc: Don Bowman , "'Fran.Lawas-Grodek@grc.nasa.gov'" , Luigi Rizzo , Cindy.Tran@grc.nasa.gov, freebsd-net@FreeBSD.ORG Subject: Re: Problem in High Speed and Long Delay with FreeBSD In-Reply-To: <3DC2D147.8357C198@lmco.com> Organization: BBN Technologies/NASA GRC Song-of-the-Day: Piano Man Date: Fri, 01 Nov 2002 14:28:11 -0500 Sender: owner-freebsd-net@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.org > Are you sure you're not hitting the top of the pipe and bouncing > around in congestion avoidance ? Unless your window size limits > your bw at exactly the correct amount, you'll never get the steady > state We're not bouncing around. We see no loss, which would indicate that either we should continue slow start (exponential cwnd growth) or stop growing cwnd when we hit the advertised window. But, we do neither of these. At some point the cwnd just stops growing -- even though we have plenty of advertised window left and no loss. Hm. allman -- Mark Allman -- BBN/NASA GRC -- http://roland.grc.nasa.gov/~mallman/ To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-net" in the body of the message