From mboxrd@z Thu Jan 1 00:00:00 1970 From: David Miller Subject: Re: [PATCH next] dctcp: update cwnd on congestion event Date: Tue, 15 Nov 2016 22:02:40 -0500 (EST) Message-ID: <20161115.220240.164646299093092679.davem@davemloft.net> References: <1479138121-32294-1-git-send-email-fw@strlen.de> Mime-Version: 1.0 Content-Type: Text/Plain; charset=us-ascii Content-Transfer-Encoding: 7bit Cc: netdev@vger.kernel.org, brakmo@fb.com, agshew@gmail.com, glenn.judd@morganstanley.com, daniel@iogearbox.net To: fw@strlen.de Return-path: Received: from shards.monkeyblade.net ([184.105.139.130]:35372 "EHLO shards.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752578AbcKPDCm (ORCPT ); Tue, 15 Nov 2016 22:02:42 -0500 In-Reply-To: <1479138121-32294-1-git-send-email-fw@strlen.de> Sender: netdev-owner@vger.kernel.org List-ID: From: Florian Westphal Date: Mon, 14 Nov 2016 16:42:01 +0100 > draft-ietf-tcpm-dctcp-02 says: > > ... when the sender receives an indication of congestion > (ECE), the sender SHOULD update cwnd as follows: > > cwnd = cwnd * (1 - DCTCP.Alpha / 2) > > So, lets do this and reduce cwnd more smoothly (and faster), as per > current congestion estimate. > > Cc: Lawrence Brakmo > Cc: Andrew Shewmaker > Cc: Glenn Judd > Cc: Daniel Borkmann > Signed-off-by: Florian Westphal Applied.