IETF Logo Mail Archive

Re: [ledbat] WG last call on draft-ietf-ledbat-congestion-08

Padma Bhooma <bhooma@apple.com> Tue, 11 October 2011 23:40 UTC

Return-Path: <bhooma@apple.com>
X-Original-To: ledbat@ietfa.amsl.com
Delivered-To: ledbat@ietfa.amsl.com
Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 64AC121F8B9C for <ledbat@ietfa.amsl.com>; Tue, 11 Oct 2011 16:40:00 -0700 (PDT)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -106.599
X-Spam-Level:
X-Spam-Status: No, score=-106.599 tagged_above=-999 required=5 tests=[BAYES_00=-2.599, RCVD_IN_DNSWL_MED=-4, USER_IN_WHITELIST=-100]
Received: from mail.ietf.org ([12.22.58.30]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 5gIF4HYL+f6I for <ledbat@ietfa.amsl.com>; Tue, 11 Oct 2011 16:40:00 -0700 (PDT)
Received: from mail-out.apple.com (mail-out.apple.com [17.151.62.51]) by ietfa.amsl.com (Postfix) with ESMTP id 0831921F8B66 for <ledbat@ietf.org>; Tue, 11 Oct 2011 16:40:00 -0700 (PDT)
MIME-version: 1.0
Content-transfer-encoding: 7bit
Content-type: text/plain; CHARSET="US-ASCII"
Received: from relay13.apple.com ([17.128.113.29]) by mail-out.apple.com (Oracle Communications Messaging Exchange Server 7u4-20.01 64bit (built Nov 21 2010)) with ESMTPS id <0LSX00DXADQKUBD1@mail-out.apple.com> for ledbat@ietf.org; Tue, 11 Oct 2011 16:39:59 -0700 (PDT)
X-AuditID: 1180711d-b7b16ae000004efb-2a-4e94d2f8eafa
Received: from [17.193.15.22] (Unknown_Domain [17.193.15.22]) by relay13.apple.com (Apple SCV relay) with SMTP id 60.5B.20219.8F2D49E4; Tue, 11 Oct 2011 16:36:24 -0700 (PDT)
From: Padma Bhooma <bhooma@apple.com>
Date: Tue, 11 Oct 2011 16:39:59 -0700
Message-id: <2D481290-12BA-4101-81A1-07FF95A7CD29@apple.com>
To: ledbat@ietf.org
X-Mailer: Apple Mail (2.1247)
X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFvrCJMWRmVeSWpSXmKPExsUieJBfTPfHpSl+Bs3X+C3+PXrO5sDosWTJ T6YAxigum5TUnMyy1CJ9uwSujPu7kguWsFZMfVPfwDiDpYuRk0NCwERias9ONghbTOLCvfVA NheHkMB6Rome9h9MIAk2AVWJk3/uMIPYzAJaEjf+vWSCsLUlli18DRYXFrCVOHb2MNhQFqD6 Z6c6wYbyCthIXHxyAywuIiAsMePUOVaIuKHEz8nrmCAWy0q8e/uGbQIjzywkK2YhWTELScsC RuZVjIJFqTmJlYbGeokFBTmpesn5uZsYQWHRUCi7g3H/T/5DjAIcjEo8vBu7J/sJsSaWFVfm HmKU4GBWEuHt3zXFT4g3JbGyKrUoP76oNCe1+BCjNAeLkjjvtTNAKYH0xJLU7NTUgtQimCwT B6dUA+OUvS+Fjj/pclNRnNYeHywQL5/GV5dcm5bn8PPGrVDOmiUHJ/nOq9ITy9z043vM1cu9 3CLxa3USNASCW258kw/RZ2/T0frncqivREZ0qRuPxdkH7EkVizzPP3lbWvuG5cXje1tlPqy9 Isw445DjVJNL6d9nTzCdd4qlgfVK4KZPj/dfL1yx5JISS3FGoqEWc1FxIgDWtfIfBwIAAA==
Subject: Re: [ledbat] WG last call on draft-ietf-ledbat-congestion-08
X-BeenThere: ledbat@ietf.org
X-Mailman-Version: 2.1.12
Precedence: list
List-Id: Mailing list of the LEDBAT WG <ledbat.ietf.org>
List-Unsubscribe: <https://www.ietf.org/mailman/options/ledbat>, <mailto:ledbat-request@ietf.org?subject=unsubscribe>
List-Archive: <http://www.ietf.org/mail-archive/web/ledbat>
List-Post: <mailto:ledbat@ietf.org>
List-Help: <mailto:ledbat-request@ietf.org?subject=help>
List-Subscribe: <https://www.ietf.org/mailman/listinfo/ledbat>, <mailto:ledbat-request@ietf.org?subject=subscribe>
X-List-Received-Date: Tue, 11 Oct 2011 23:40:00 -0000

Hi,

I reviewed the latest draft and I have few comments on the latest changes. A receiver may have to echo the remote timestamp to allow for computation of RTT which it can use for computing CTO. It might be useful to mention that the sender is supposed to retransmit sent data or transmit new data to restart the ACK clock.

Other than the comments above I think the algorithm is ready for adoption.

The implementation of LEDBAT algorithm that was done as a TCP Congestion control module in Mac OS X is available at the following link:
http://opensource.apple.com/source/xnu/xnu-1699.22.81/bsd/netinet/tcp_ledbat.c

Thanks,
Padma

v2.23.0 | Report a Bug | By Email