From mboxrd@z Thu Jan 1 00:00:00 1970 From: Lawrence Brakmo Subject: Re: [RFC PATCH v5 net-next 4/4] tcp: add NV congestion control Date: Wed, 26 Aug 2015 00:05:43 +0000 Message-ID: References: <1438738748-1756255-1-git-send-email-brakmo@fb.com> <1438738748-1756255-5-git-send-email-brakmo@fb.com> Mime-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: QUOTED-PRINTABLE Cc: netdev , Kernel Team , "Neal Cardwell" , Eric Dumazet , Yuchung Cheng , Stephen Hemminger To: Kenneth Klette Jonassen Return-path: Received: from mx0a-00082601.pphosted.com ([67.231.145.42]:12735 "EHLO mx0a-00082601.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932899AbbHZAF4 convert rfc822-to-8bit (ORCPT ); Tue, 25 Aug 2015 20:05:56 -0400 In-Reply-To: Content-Language: en-US Content-ID: Sender: netdev-owner@vger.kernel.org List-ID: On 8/5/15, 5:51 PM, "knneth@gmail.com on behalf of Kenneth Klette Jonassen" wrote: >On Wed, Aug 5, 2015 at 3:39 AM, Lawrence Brakmo wrote: >> This is a request for comments. > >Nice to see more development on delay-based congestion control. > >It would be good to see how NV stacks up against CDG. Any chance of >adding cdg as a congestion control parameter to your experiments? Done. I=B9m updating the TCP-NV page with the updated results, should b= e done by tomorrow (8/26). >Experiments on NV without its temporary cwnd reductions would also be >of interest -- to get a reference of how effective this mechanism is. Done. It turns out that it only improves fairness a little but hurts P99 latencies more significantly. So it is now off by default. Thanks for making me re-examine this feature. =20