From owner-freebsd-net@FreeBSD.ORG Tue Jun 17 07:41:36 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 C2C4840B; Tue, 17 Jun 2014 07:41:36 +0000 (UTC) Received: from mail-qa0-x22f.google.com (mail-qa0-x22f.google.com [IPv6:2607:f8b0:400d:c00::22f]) (using TLSv1 with cipher ECDHE-RSA-RC4-SHA (128/128 bits)) (Client CN "smtp.gmail.com", Issuer "Google Internet Authority G2" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 764732F00; Tue, 17 Jun 2014 07:41:36 +0000 (UTC) Received: by mail-qa0-f47.google.com with SMTP id hw13so7493016qab.20 for ; Tue, 17 Jun 2014 00:41:35 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :cc:content-type; bh=JmtO1EEbH5b1x4yRj6O8P7NWFNJf1edNEDc7iKkfVHw=; b=ag4U6fujG4xjwWrAYNsLF02PbTrAAhK3WIc9163tDD6WVBGYKL68exr7Q8bZulclxx CE9i0xBHsOP+Vd0Nrlq72CwY4sFHZpnpSrDc62330ou6f0VA28VxoIAvVnw/K2GE8RC+ bNAhAAS64RYJt5aZZY+5bfUV7nwmnANxNvvlG5EJ3EwtHCg1bCMdSDQ15uzKBTay7fPY FEHzf+Qn65iOfOC3ZWisYfiVBtYHtkMxMriV5c5xIdz0pRPHQ7gN/8HZiq9xvaYPdpoN ubqJ57fM4RSQsF/0B3yHzyOMy3gc4qOvg0VhhF/+jYKdWHrdCOr7U9KkezIAIgTxAs0d 9QZg== MIME-Version: 1.0 X-Received: by 10.224.166.73 with SMTP id l9mr33135594qay.34.1402990895597; Tue, 17 Jun 2014 00:41:35 -0700 (PDT) Received: by 10.96.73.39 with HTTP; Tue, 17 Jun 2014 00:41:35 -0700 (PDT) In-Reply-To: <1863738251.20140616172546@serebryakov.spb.ru> References: <1863738251.20140616172546@serebryakov.spb.ru> Date: Tue, 17 Jun 2014 00:41:35 -0700 Message-ID: Subject: Re: LEDBAT (RFC-6817)i n FreeBSD as mod_cc(9)? From: hiren panchasara To: Lev Serebryakov Content-Type: text/plain; charset=UTF-8 Cc: "freebsd-net@freebsd.org" 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: Tue, 17 Jun 2014 07:41:36 -0000 On Mon, Jun 16, 2014 at 6:25 AM, Lev Serebryakov wrote: > 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? I'd guess there is nothing wrong in having this as a cc module. Someone has to do the necessary legwork :-) cheers, Hiren