From owner-freebsd-net@FreeBSD.ORG Mon Jun 16 13:25:51 2014 Return-Path: Delivered-To: freebsd-net@FreeBSD.org Received: from mx1.freebsd.org (mx1.freebsd.org [8.8.178.115]) (using TLSv1 with cipher ADH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTPS id 1759538D for ; Mon, 16 Jun 2014 13:25:51 +0000 (UTC) Received: from onlyone.friendlyhosting.spb.ru (onlyone.friendlyhosting.spb.ru [IPv6:2a01:4f8:131:60a2::2]) by mx1.freebsd.org (Postfix) with ESMTP id D26E920F5 for ; Mon, 16 Jun 2014 13:25:50 +0000 (UTC) Received: from lion.home.serebryakov.spb.ru (unknown [IPv6:2001:470:923f:1:1c4b:cac4:59c6:f7d9]) (Authenticated sender: lev@serebryakov.spb.ru) by onlyone.friendlyhosting.spb.ru (Postfix) with ESMTPSA id 784134AC0F for ; Mon, 16 Jun 2014 17:25:49 +0400 (MSK) Date: Mon, 16 Jun 2014 17:25:46 +0400 From: Lev Serebryakov Reply-To: lev@FreeBSD.org Organization: FreeBSD X-Priority: 3 (Normal) Message-ID: <1863738251.20140616172546@serebryakov.spb.ru> To: freebsd-net@FreeBSD.org Subject: LEDBAT (RFC-6817)i n FreeBSD as mod_cc(9)? MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit X-BeenThere: freebsd-net@freebsd.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: Networking and TCP/IP with FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 16 Jun 2014 13:25:51 -0000 Hello, Freebsd-net. It looks like, that some TCP connections could benefit from LEDBAT (RFC-6871) cognestion control algorithm (not all, of course, it should not be default). Also, it looks like Apple implements one (http://www.opensource.apple.com/source/xnu/xnu-1699.32.7/bsd/netinet/tcp_ledbat.c), but it uses much more "callbacks" from TCP/SCTP core to CC module, that FreeBSD has. Does somebody evaluate, is it possible to bring LEDBAT to FreeBSD? -- // Black Lion AKA Lev Serebryakov