From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-iy0-f171.google.com (mail-iy0-f171.google.com [209.85.210.171]) (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 4E359200051 for ; Mon, 23 May 2011 06:23:55 -0700 (PDT) Received: by iyi20 with SMTP id 20so7227169iyi.16 for ; Mon, 23 May 2011 06:36:51 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:mime-version:in-reply-to:references:date :message-id:subject:from:to:cc:content-type; bh=rI23lxk1CAXBCUKMG/1HZhEwjOQSngJREiBeQ8IPwA4=; b=STt8IuJ8VTh+q5nPmQDb8afwoYV7+tfwPxjcxqFyspwFM1bt7DHn42L+zAJVr/EzVx NFBulYu0QZ1Scr+L5tG8Km0TV4cYkzWWXUq+iNmdNXwAS/ycg31rQ3tdO0/G36WWZWt7 x1Y/tBaGl3dyp6rRwPzQZY2duM4eXNcX2EE1w= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :cc:content-type; b=GrtZpoDh1omd782mDHV4NMCRB/axqEc7T4tDM1+YqLHr14elTNFaIo7yGMG1L4F9wx p2XWYWCCTxubc2lNYut65rk6bFvYLF/eRK8Nlf4ps9XHvbNzQJQmJVQdFaxNHnS+N2Gw hCDmi+Zkc/hbhvrbJK7m4BvkWpFAx2h/8AtTM= MIME-Version: 1.0 Received: by 10.231.92.206 with SMTP id s14mr2130718ibm.106.1306157811438; Mon, 23 May 2011 06:36:51 -0700 (PDT) Received: by 10.231.35.139 with HTTP; Mon, 23 May 2011 06:36:51 -0700 (PDT) In-Reply-To: <4DDA6061.8050901@freedesktop.org> References: <4DDA6061.8050901@freedesktop.org> Date: Mon, 23 May 2011 07:36:51 -0600 Message-ID: From: Dave Taht To: Jim Gettys Content-Type: multipart/alternative; boundary=bcaec543204a5f143904a3f190e6 Cc: bismark-devel@lists.bufferbloat.net Subject: Re: [Bismark-devel] Note the following about RED. X-BeenThere: bismark-devel@lists.bufferbloat.net X-Mailman-Version: 2.1.13 Precedence: list List-Id: BISMark related software development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 23 May 2011 13:23:55 -0000 --bcaec543204a5f143904a3f190e6 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable On Mon, May 23, 2011 at 7:25 AM, Jim Gettys wrote: > Van Jacobson is quite pessimistic that you can find a RED 93 operating > point that will work well in the face of Powerboost like variable bandwid= th > features in home broadband environments. So if you get into trouble with > it, don't be too surprised. > I'm not expecting to find powerboost-like behavior in South Africa. I have taken quite a few traces at this point that could use some analysis, however. > In fact, its use at all in the edge of the network he believes is > problematic. There is too little aggregation and too much variability of > traffic in a home environment for he or Kathie Nichols to have any belief= in > sane behaviour in RED 93 given RED's problems. > > Ergo our interests in SFB and RED Light and eBDP (which Van pointed us at i= n > the first place). > - Jim > > Regrettably SFB as currently implemented, is as yet untested, nor are reasonable defaults known, RED Light unavailable, and... The RED part of openwrt's "qos-script" has been shipped on several million routers, and it's behavior is not well understood. It uses hfsc, SFB, and RED to do its work. After analysis, under South African circumstances, RED is mostly not triggered, the hfsc portion of the script is where most of the action is taking place. http://www.bufferbloat.net/issues/171 > > _______________________________________________ > Bismark-devel mailing list > Bismark-devel@lists.bufferbloat.net > https://lists.bufferbloat.net/listinfo/bismark-devel > --=20 Dave T=E4ht SKYPE: davetaht US Tel: 1-239-829-5608 http://the-edge.blogspot.com --bcaec543204a5f143904a3f190e6 Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable
On Mon, May 23, 2011 at 7:25 AM, Jim Gettys = <jg@freedesktop.= org> wrote:
Van Jacobson is quite pessimistic that you can find a RED 93 operating poin= t that will work well in the face of Powerboost like variable bandwidth fea= tures in home broadband environments. =A0So if you get into trouble with it= , don't be too surprised.


I'm not expecting to find powerboost-like beh= avior in South Africa. I have taken quite a few traces at this point that c= ould use some analysis, however.
=A0


In fact, its use at all in the edge of the network he believes is problemat= ic. =A0There is too little aggregation and too much variability of traffic = in a home environment for he or Kathie Nichols to have any belief in sane b= ehaviour =A0in RED 93 given RED's problems.
=A0
Ergo our interests in SFB and RED Light and eBDP (which Van pointed us at i= n the first place).
=A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0- Jim


Regrettably SFB as currently implemented, is as y= et untested, nor are reasonable defaults known, RED Light unavailable, and.= ..

The RED part of openwrt's "qos-script" has been shi= pped on several million routers, and it's behavior is not well understo= od. It uses hfsc, SFB, and RED to do its work.
=A0
After analysis, under South African circumstances, RED is mostly not= triggered, the hfsc portion of the script is where most of the action is t= aking place.


h= ttp://www.bufferbloat.net/issues/171





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Dave T=E4ht
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