From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-gy0-f171.google.com (mail-gy0-f171.google.com [209.85.160.171]) (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 82ED52009BA for ; Wed, 27 Jul 2011 10:53:14 -0700 (PDT) Received: by gyh20 with SMTP id 20so1884751gyh.16 for ; Wed, 27 Jul 2011 11:36:51 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :cc:content-type; bh=ZWGAfMJ6UpvqhfVf3P9LsQkcgzR/E0MXifn56PSgK8Q=; b=hCRtGJRf2S6XX4dTLcBPfS9oKdwpA4q/vtzyCXHgcSUI+GGIoqrKDRD631gu0SD0TA g9zitZDYKOrzkL3g2QM9AeFRyJmgV0ZRkuep4vKxRkbn3K01vgVV+I5/MhSiPBHb1Do3 bjq2LGtFxOzYo3YTYGLyxBYilWFTBIBe85tBI= MIME-Version: 1.0 Received: by 10.42.18.10 with SMTP id v10mr120048ica.229.1311791811219; Wed, 27 Jul 2011 11:36:51 -0700 (PDT) Received: by 10.42.229.4 with HTTP; Wed, 27 Jul 2011 11:36:50 -0700 (PDT) In-Reply-To: <7ilivj7mla.fsf@lanthane.pps.jussieu.fr> References: <7ilivj7mla.fsf@lanthane.pps.jussieu.fr> Date: Wed, 27 Jul 2011 12:36:50 -0600 Message-ID: Subject: Re: some (less than funny) interactions with networking on openwrt (and other systems) From: Dave Taht To: Juliusz Chroboczek Content-Type: multipart/alternative; boundary=20cf301d41c6ed523a04a9115443 Cc: bismark-devel@projectbismark.net, bloat-devel , Srikanth Sundaresan X-BeenThere: bloat-devel@lists.bufferbloat.net X-Mailman-Version: 2.1.13 Precedence: list List-Id: "Developers working on AQM, device drivers, and networking stacks" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 27 Jul 2011 17:53:14 -0000 --20cf301d41c6ed523a04a9115443 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable On Wed, Jul 27, 2011 at 9:46 AM, Juliusz Chroboczek wro= te: > > 2) qos-scripts (already mentioned) as an additional problem of always > > ending up with 127 buckets or so for packets in the SFQ qdisc, when a > > 'righter' number would be closer to 8-32. > > Huh? > Tc reports 127 for SFQ with the default qdisc > > > It also enables ecn by default. but ecn is often turned off on the > > router, so there's no way to see it in action if you are generating > > traffic from the router. > > https://dev.openwrt.org/ticket/3001 > > I managed to get ECN enabled in OpenWRT trunk, but the change was subse- > quently reverted. > > It's enabled in cerowrt by default. > 5) DRR is the new hotness, but I haven't played with it. It's supposed > > to make red-like stuff simpler. > > Link? > > http://cateee.net/lkddb/web-lkddb/NET_SCH_DRR.html multiple hits on google... don't know what variant it is... my whole point with cerowrt was to be able to get *reproducable* results while fiddling with all the AQMs. http://www.google.com/search?client=3Dubuntu&channel=3Dfs&q=3Ddirect+round+= robin&ie=3Dutf-8&oe=3Dutf-8#pq=3Ddirect%20round%20robin&hl=3Den&cp=3D22&gs_= id=3Dg&xhr=3Dt&q=3Ddirect+round+robin+DRR&qe=3DZGlyZWN0IHJvdW5kIHJvYmluIERS= Ug&qesig=3DRcJg4Jg_fUZP8VPsdCvmGA&pkc=3DAFgZ2tmu4dq80_gTlQK_O2pc3crE-cSohUI= xzYzi2jSJgHEuwW5SeFaYxyesYaKUo-7p8Iw0LzjsmYpj_P7WTia3UwzzO5Kuwg&pf=3Dp&scli= ent=3Dpsy&client=3Dubuntu&hs=3DBEp&channel=3Dfs&source=3Dhp&pbx=3D1&oq=3Ddi= rect+round+robin+DRR&aq=3Df&aqi=3D&aql=3D&gs_sm=3D&gs_upl=3D&bav=3Don.2,or.= r_gc.r_pw.&fp=3D42e6aa27a76a3271&biw=3D959&bih=3D487 > -- Juliusz > --=20 Dave T=E4ht SKYPE: davetaht US Tel: 1-239-829-5608 http://the-edge.blogspot.com --20cf301d41c6ed523a04a9115443 Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable

On Wed, Jul 27, 2011 at 9:46 AM, Juliusz= Chroboczek <jch= @pps.jussieu.fr> wrote:
> 2) qos-scripts (already mentioned) as an additional = problem of always
> ending up with 127 buckets or so for packets in the SFQ qdisc, when a<= br> > 'righter' number would be closer to 8-32.

Huh?

Tc reports 127 for SFQ with the default= qdisc
=A0

> It also enables ecn by default. but ecn is often turned off on the
> router, so there's no way to see it in action if you are generatin= g
> traffic from the router.

=A0https://dev.openwrt.org/ticket/3001

I managed to get ECN enabled in OpenWRT trunk, but the change was subse- quently reverted.


It's enabled in cerow= rt by default.

> 5) DRR is the new hotness, but I haven't played with it. It's = supposed
> to make red-like stuff simpler.

Link?

http://cateee.net/lkddb/web-lkddb/= NET_SCH_DRR.html

multiple hits on google... don't know what = variant it is... my whole point with cerowrt was to be able to get *reprodu= cable* results while fiddling with all the AQMs.

http://www.google.com/search?client=3Du= buntu&channel=3Dfs&q=3Ddirect+round+robin&ie=3Dutf-8&oe=3Du= tf-8#pq=3Ddirect%20round%20robin&hl=3Den&cp=3D22&gs_id=3Dg&= xhr=3Dt&q=3Ddirect+round+robin+DRR&qe=3DZGlyZWN0IHJvdW5kIHJvYmluIER= SUg&qesig=3DRcJg4Jg_fUZP8VPsdCvmGA&pkc=3DAFgZ2tmu4dq80_gTlQK_O2pc3c= rE-cSohUIxzYzi2jSJgHEuwW5SeFaYxyesYaKUo-7p8Iw0LzjsmYpj_P7WTia3UwzzO5Kuwg&am= p;pf=3Dp&sclient=3Dpsy&client=3Dubuntu&hs=3DBEp&channel=3Df= s&source=3Dhp&pbx=3D1&oq=3Ddirect+round+robin+DRR&aq=3Df&am= p;aqi=3D&aql=3D&gs_sm=3D&gs_upl=3D&bav=3Don.2,or.r_gc.r_pw.= &fp=3D42e6aa27a76a3271&biw=3D959&bih=3D487
=A0
-- Juliusz



--
Dave T=E4ht
S= KYPE: davetaht
US Tel: 1-239-829-5608
http://the-edge.blogspot.com
--20cf301d41c6ed523a04a9115443--