From owner-freebsd-current Sat Oct 5 11:20:16 2002 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 2C0FF37B404 for ; Sat, 5 Oct 2002 11:20:15 -0700 (PDT) Received: from apollo.backplane.com (apollo.backplane.com [216.240.41.2]) by mx1.FreeBSD.org (Postfix) with ESMTP id A044643E4A for ; Sat, 5 Oct 2002 11:20:14 -0700 (PDT) (envelope-from dillon@apollo.backplane.com) Received: from apollo.backplane.com (localhost [127.0.0.1]) by apollo.backplane.com (8.12.5/8.12.4) with ESMTP id g95IKEPQ038555; Sat, 5 Oct 2002 11:20:14 -0700 (PDT) (envelope-from dillon@apollo.backplane.com) Received: (from dillon@localhost) by apollo.backplane.com (8.12.5/8.12.4/Submit) id g95IKDgJ038554; Sat, 5 Oct 2002 11:20:13 -0700 (PDT) (envelope-from dillon) Date: Sat, 5 Oct 2002 11:20:13 -0700 (PDT) From: Matthew Dillon Message-Id: <200210051820.g95IKDgJ038554@apollo.backplane.com> To: Alexander Leidinger Cc: current@FreeBSD.ORG Subject: Re: Meaning of net.inet.tcp.inflight_debug output? References: <20021004135022.3decb56f.Alexander@Leidinger.net> <200210041834.g94IYkBR003033@apollo.backplane.com> <20021005110923.0c9d9a68.Alexander@Leidinger.net> Sender: owner-freebsd-current@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.ORG : :On Fri, 4 Oct 2002 11:34:46 -0700 (PDT) :Matthew Dillon wrote: : :> When you turn the debugging on it will print out various :> parameters used to calculate the bandwidth window. The higher the :> debug value, the more often it prints out the stats (assuming a :> TCP is under load). Since the stats may reflect any tcp connection :> you typically only do this while running a single TCP connection :> under heavy load. : :So shouldn't it be off by default? : :> rttbest and srtt are scaled to hz * 32, I believe (I'm not :> positive). So with the default 100 hz it would be scaled to 3200, :> so an rttbest of 680 would translate to 212mS. Sounds like a :> connection over a modem. : :On my side there's a DSL line (768k up / 128k down), I don't know what :was on the other side for this particular example. : :Bye, :Alexander. Well, it's an experimental feature. The whole feature is turned off by default but in -current debugging is turned on by default if you turn the feature on. In -stable debugging is turned off by default to avoid confusion. In anycase, I could change the debugging default to off in -current but I can't do it right this moment. I'll try to remember to do it tonight. -Matt Matthew Dillon To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message