From owner-freebsd-current@FreeBSD.ORG Wed Jul 9 23:44:49 2003 Return-Path: Delivered-To: freebsd-current@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 2916537B401 for ; Wed, 9 Jul 2003 23:44:49 -0700 (PDT) Received: from mailhub.yumyumyum.org (dsl092-171-091.wdc1.dsl.speakeasy.net [66.92.171.91]) by mx1.FreeBSD.org (Postfix) with ESMTP id F17CD43FBD for ; Wed, 9 Jul 2003 23:44:47 -0700 (PDT) (envelope-from culverk@yumyumyum.org) Received: by mailhub.yumyumyum.org (Postfix, from userid 1001) id 76C952B7; Thu, 10 Jul 2003 02:45:04 -0400 (EDT) Received: from localhost (localhost [127.0.0.1]) by mailhub.yumyumyum.org (Postfix) with ESMTP id 6C4A470; Thu, 10 Jul 2003 02:45:04 -0400 (EDT) Date: Thu, 10 Jul 2003 02:45:04 -0400 (EDT) From: Kenneth Culver To: Dan Nelson In-Reply-To: <20030710062431.GQ39506@dan.emsphone.com> Message-ID: <20030710024158.K8565@alpha.yumyumyum.org> References: <20030709220958.GO39506@dan.emsphone.com> <20030710062431.GQ39506@dan.emsphone.com> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII cc: Jeff Roberson cc: John Polstra cc: current@freebsd.org cc: Julian Elischer Subject: Re: wierd dsl performance with -CURRENT X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: Discussions about the use of FreeBSD-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 10 Jul 2003 06:44:49 -0000 > This is the data transfer, so the d2c_* plots are the interesting ones > (they graph the traffic from ftp2 to you). If you load up d2c_tput.xpl, > you can see that your throughput averaged ~164K/s for almost the entire > time. The red line is the short-term average, and you can see there > were four dips, corresponding to packet loss. Flip over to the > d2c_tsg.xpl plot, which graphs the sent packets, ACKs, and the receive > window. At 21:52:32.8, it looks like four consecutive packets were > dropped. Luckily, the packets were resent quickly, and transmission > resumed at full speed. Dips 3 and 4 look the same. Dip 2 has an extra > .2 second delay for some reason. It looks like fast restransmit kicked > in on all three dips, but for some reason it didn't recover fast enough > on #2. A TCP guru will have to tell you what to do next... Well, the actual transfer occured around 145 - 150KB/sec according to the ftp program, normally that is 160KB/sec, and the average is around 10-15KB/sec higher after you factor out at least ftp, tcp, IP, and ethernet header. My bandwidth monitor dockapp shows around 176-164 when it's working right, but now it starts really slow and eventually gets to around the average you saw in the graphs. Ken