From owner-freebsd-net Wed Apr 17 10: 2:47 2002 Delivered-To: freebsd-net@freebsd.org Received: from fubar.damon.com (damon.com [199.98.84.2]) by hub.freebsd.org (Postfix) with ESMTP id 6EC4237B400 for ; Wed, 17 Apr 2002 10:02:41 -0700 (PDT) Received: from fubar.damon.com (localhost [127.0.0.1]) by fubar.damon.com (8.12.2/8.12.2) with ESMTP id g3HH2ZwM006518; Wed, 17 Apr 2002 12:02:35 -0500 (CDT) (envelope-from dap@fubar.damon.com) Received: (from dap@localhost) by fubar.damon.com (8.12.2/8.12.2/Submit) id g3HH2ZiC006517; Wed, 17 Apr 2002 12:02:35 -0500 (CDT) Date: Wed, 17 Apr 2002 12:02:35 -0500 From: Damon Permezel To: Christophe Prevotaux Cc: A.Isaev@astelit.ru, freebsd-net@FreeBSD.ORG Subject: Re: FreeBSD 4.5 and network problems Message-ID: <20020417170235.GV343@fubar.damon.com> References: <16114655943.20020417131347@astelit.ru> <20020417160045.GQ343@fubar.damon.com> <20020417185228.7bada407.c.prevotaux@hexanet.fr> Mime-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <20020417185228.7bada407.c.prevotaux@hexanet.fr> User-Agent: Mutt/1.3.27i 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 I am talking about IP over gigabit ethernet. Concievably, if one had enough time, one might observe this over a satellite link. The necessary flows are bandwidth independent, but the time to observe the problem is bandwidth dependent. On Wed, Apr 17, 2002 at 06:52:28PM +0200, Christophe Prevotaux wrote: > Are you talking about IP over Satellite link ? > > > > On Wed, 17 Apr 2002 11:00:45 -0500 > Damon Permezel wrote: > > > Not sure about the initial delays, but I found a bug which does cause > > throughput to drop dramatically once it is hit. > > > > Consider the sender of a bulk data transfer (1/2 duplex). > > When header prediction is successful, the ACK stream coming back > > is handled by the fast path code. For this to be true, the window info > > in that ACK stream cannot change. > > > > tiwin && tiwin == tp->snd_wnd > > > > -- > =============================================================== > Christophe Prevotaux Email: c.prevotaux@hexanet.fr > HEXANET SARL URL: http://www.hexanet.fr/ > Z.A.C Les Charmilles Tel: +33 (0)3 26 79 30 05 > 3 Allée Thierry Sabine Direct: +33 (0)3 26 79 08 02 > BP202 Fax: +33 (0)3 26 79 30 06 > 51686 Reims Cedex 2 > FRANCE HEXANET Network Operation Center > =============================================================== -- -- Damon Permezel dap@damon.com To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-net" in the body of the message