From owner-freebsd-net@FreeBSD.ORG Thu Apr 30 13:20:28 2015 Return-Path: Delivered-To: freebsd-net@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [8.8.178.115]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTPS id DCC725F3 for ; Thu, 30 Apr 2015 13:20:28 +0000 (UTC) Received: from mx141.netapp.com (mx141.netapp.com [216.240.21.12]) (using TLSv1 with cipher RC4-SHA (128/128 bits)) (Client CN "mx141.netapp.com", Issuer "VeriSign Class 3 International Server CA - G3" (not verified)) by mx1.freebsd.org (Postfix) with ESMTPS id B1ECE1860 for ; Thu, 30 Apr 2015 13:20:27 +0000 (UTC) X-IronPort-AV: E=Sophos;i="5.11,677,1422950400"; d="scan'208";a="40231441" Received: from hioexcmbx02-prd.hq.netapp.com ([10.122.105.35]) by mx141-out.netapp.com with ESMTP; 30 Apr 2015 06:19:38 -0700 Received: from HIOEXCMBX07-PRD.hq.netapp.com (10.122.105.40) by hioexcmbx02-prd.hq.netapp.com (10.122.105.35) with Microsoft SMTP Server (TLS) id 15.0.995.29; Thu, 30 Apr 2015 06:19:38 -0700 Received: from HIOEXCMBX07-PRD.hq.netapp.com ([::1]) by hioexcmbx07-prd.hq.netapp.com ([fe80::f07f:691d:89d:53b7%21]) with mapi id 15.00.0995.031; Thu, 30 Apr 2015 06:19:38 -0700 From: "Eggert, Lars" To: Karlis Laivins CC: George Neville-Neil , "freebsd-net@freebsd.org" , grenville armitage Subject: Re: Congestion Control Modification Thread-Topic: Congestion Control Modification Thread-Index: AQHQeaU33IcUV8/cd0qlR1H1jM0AGJ1XD+mAgABJ8QCADrEXAIAAA4oAgAAELYA= Date: Thu, 30 Apr 2015 13:19:37 +0000 Message-ID: <98E7D40A-EC37-413D-85CE-2A6012811E08@netapp.com> References: <5535945F.90504@swin.edu.au> In-Reply-To: Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-mailer: Apple Mail (2.2098) x-originating-ip: [10.122.56.79] Content-Type: text/plain; charset="us-ascii" Content-ID: Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-BeenThere: freebsd-net@freebsd.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: Networking and TCP/IP with FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 30 Apr 2015 13:20:29 -0000 On 2015-4-30, at 15:04, Karlis Laivins wrote: > I have yet to solve the issue of > how to get the One Way Delay for the ACK message (the time it takes ACK t= o > arrive from receiver of the ACK'ed data sender) correctly. That won't work without synchronized clocks, which you can't really assume = to be present. Lars=