From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Ian McDonald" Subject: Re: TCP Pacing Date: Wed, 13 Sep 2006 09:26:19 +1200 Message-ID: <5640c7e00609121426t75f5519at562a85f40b64163@mail.gmail.com> References: <200609121958.22820.root@danielinux.net> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Cc: "Stephen Hemminger" , "David S. Miller" , netdev@vger.kernel.org, "Carlo Caini" , "Rosario Firrincieli" , "Giovanni Pau" Return-path: Received: from nf-out-f131.google.com ([64.233.182.131]:26498 "EHLO nf-out-f131.google.com") by vger.kernel.org with ESMTP id S1030270AbWILV0V (ORCPT ); Tue, 12 Sep 2006 17:26:21 -0400 Received: by nf-out-f131.google.com with SMTP id k65so204231nfa for ; Tue, 12 Sep 2006 14:26:20 -0700 (PDT) To: root@danielinux.net In-Reply-To: <200609121958.22820.root@danielinux.net> Content-Disposition: inline Sender: netdev-owner@vger.kernel.org List-Id: netdev.vger.kernel.org On 9/13/06, Daniele Lacamera wrote: > Hello, > > Please let me insist once again on the importance of adding a TCP Pacing > mechanism in our TCP, as many people are including this algorithm in > their congestion control proposals. Recent researches have found out > that it really can help improving performance in different scenarios, > like satellites and long-delay high-speed channels (>100ms RTT, Gbit). > Hybla module itself is cripple without this feature in its natural > scenario. Where is the published research? If you are going to mention research you need URLs to papers and please put this in source code too so people can check. > > The following patch is totally non-invasive: it has a config option and > a sysctl switch, both turned off by default. When the config option is > enabled, it adds only 6B to the tcp_sock. > I agree with Arnaldo's comments and also would add I don't like having to select 1000 as HZ unit. Something is wrong if you need this as I can run higher resolution timers without having to do this.... Haven't reviewed the rest of the code or tested. Ian -- Ian McDonald Web: http://wand.net.nz/~iam4 Blog: http://imcdnzl.blogspot.com WAND Network Research Group Department of Computer Science University of Waikato New Zealand