From owner-freebsd-ipfw@FreeBSD.ORG Fri May 23 07:01:48 2003 Return-Path: Delivered-To: freebsd-ipfw@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 2549937B401 for ; Fri, 23 May 2003 07:01:48 -0700 (PDT) Received: from epita.fr (hermes.epita.fr [163.5.255.10]) by mx1.FreeBSD.org (Postfix) with ESMTP id A0FAE43F3F for ; Fri, 23 May 2003 07:01:44 -0700 (PDT) (envelope-from le-hen_j@epita.fr) Received: from carpediem (carpediem.epita.fr [10.42.42.5]) by epita.fr id h4NE1eq03063 Fri, 23 May 2003 16:01:40 +0200 (MEST) Date: Fri, 23 May 2003 16:01:40 +0200 From: jeremie le-hen To: Michael Sierchio Message-ID: <20030523140140.GB24992@carpediem.epita.fr> References: <20030523105030.GA24992@carpediem.epita.fr> <3ECE21BD.7060308@tenebras.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <3ECE21BD.7060308@tenebras.com> User-Agent: Mutt/1.4i cc: ipfw@freebsd.org Subject: Re: Understanding queue size X-BeenThere: freebsd-ipfw@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: IPFW Technical Discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 23 May 2003 14:01:48 -0000 > Why assume that the default values need adjusting? I'm trying to tune some parameters like queue size in order to reduce delays with interactive traffic while uploading. I tried to set various queue size with a pipe which bandwidth is 125KBit/s, from 2KBytes to 1000KBytes, and in fact I saw almost no responsivness variation. I currently use a queue size of 76KBytes, in order to send it in about 5 seconds at 125KBit/s. How do I know it's a good value ? I'm pretty sure there are some rules or some formulas which dictates how to get a good compromise between bandwidth and reactivy, but unfortunatelly, I don't know where to find them. Regards, -- Jeremie aka TtZ/TataZ jeremie.le-hen@epita.fr