From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-wg0-f47.google.com (mail-wg0-f47.google.com [74.125.82.47]) (using TLSv1 with cipher RC4-SHA (128/128 bits)) (Client CN "smtp.gmail.com", Issuer "Google Internet Authority" (verified OK)) by huchra.bufferbloat.net (Postfix) with ESMTPS id C715720191C for ; Mon, 7 May 2012 11:45:01 -0700 (PDT) Received: by wgbfa7 with SMTP id fa7so4115922wgb.28 for ; Mon, 07 May 2012 11:44:59 -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:content-transfer-encoding; bh=5+xuhaKTSUON2HfOUwRoyQGQxN3HmH4J4lW+66gV164=; b=BPbcDV/hcIwCENeQqGwF9+9Q3VPhqAvVSbFKv8vfMLval6ldCMvV7iprk76UtYvijY FwaJMhURrm04fAFvEnhhMuiNazfJsrfo39aS9RO8hx/X/oRTxOTejGtWt+iS+2TONPoI cBeOd23+PVxsEAzTM9gRdp4bnJEQ2UW4yqPhR/OoAAyGavnWH3LZV6i54matBKzBaWdC 0i0h1ifjjrdglYzLdhMcMDBoQhak0lOF1895xuK5jl4xJo4xug+9meuABhlI7XQVysgS 2RU6KXv5i4Gj+GBEqJ8Y/UU4AvfDUIPBY2MEBwF0LLKwyZA0O8q8nvVNmyzFcwOR8CLx kR2g== MIME-Version: 1.0 Received: by 10.180.100.230 with SMTP id fb6mr13140042wib.3.1336416299844; Mon, 07 May 2012 11:44:59 -0700 (PDT) Received: by 10.223.112.66 with HTTP; Mon, 7 May 2012 11:44:59 -0700 (PDT) In-Reply-To: <4FA81549.5060609@freedesktop.org> References: <1336246349-20228-1-git-send-email-dave.taht@bufferbloat.net> <4FA7FBC7.2040501@hp.com> <1336410626.3752.2329.camel@edumazet-glaptop> <4FA805F9.20004@hp.com> <1336412079.3752.2333.camel@edumazet-glaptop> <4FA81549.5060609@freedesktop.org> Date: Mon, 7 May 2012 11:44:59 -0700 Message-ID: From: Dave Taht To: Jim Gettys Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable Cc: Eric Dumazet , codel@lists.bufferbloat.net, Dave Taht Subject: Re: [Codel] [PATCH 1/2] codel: Controlled Delay AQM X-BeenThere: codel@lists.bufferbloat.net X-Mailman-Version: 2.1.13 Precedence: list List-Id: CoDel AQM discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 07 May 2012 18:45:02 -0000 On Mon, May 7, 2012 at 11:32 AM, Jim Gettys wrote: > On 05/07/2012 01:52 PM, Dave Taht wrote: >> ecn: >> >> ecn was not in the paper (and it's working well) and I'd like to live >> in a world where ecn was the default. I think. Others disagree. >> >> so perhaps ecn and noecn? And ecn be the default (after some serious tes= ting?) >> > I think noecn *must* be the default at the moment. =A0There is still too > much brokenness out there (though it is improving); Steve Bauer can > enlighten us how much. Possibly influenced by how hard it is to cycle builds on embedded hardware and test one thing at a time, as well as the space program's major success at shortening the path to the moon, I am an advocate of all-up-testing. http://www.nasa.gov/offices/oce/appel/ask-academy/issues/ask-oce/AO_1-7_F_s= napshot.html Going with ecn enabled by default, and being aware that it might cause problems, will result in less time being spent testing each individually. I note that on an ingress qdisc ecn has mildly less risk as it only tests the router and host device. On egress, yes, you're testing the whole internet. > =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0- Jim > --=20 Dave T=E4ht SKYPE: davetaht US Tel: 1-239-829-5608 http://www.bufferbloat.net