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 0F51B201044 for ; Sat, 7 Apr 2012 08:48:39 -0700 (PDT) Received: by wgbge7 with SMTP id ge7so2404439wgb.28 for ; Sat, 07 Apr 2012 08:48:38 -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=Hh8EjVYyxSAKKP3sH/LpOJzYThcEimne1l5zZXs2lyM=; b=OB7RKaeZCyEC+/ra565iBrNb2Drb79OyMrIsTla54gzVICVeQGHFuhP0vCZ8xvpKpM 1orrxFpnwV1u9v45IwhOShdPRy7H5Ci8MUZtd9BPTKPX7x069PiY/1mognKoL8wIBQe3 9ptvjdCffjG6hrVd5OWH5UMheoYLlDcqqj9Wp+cbmNsktPUtCtyvrQTbxNvgYYkXOWax xja10neO4dgOyCcJwKlkpZdIGtdsG5j9UfyjcTs1QtpvkUTJwJdVWFDaPSs71hUwUNPc 9ckn73Ul63IRbJDOZBhXvGZlSaYbGPK17gOm0qbKmyeHIhP+ZQW9PJczyuS++l5+80l5 gx6w== MIME-Version: 1.0 Received: by 10.180.95.34 with SMTP id dh2mr3796331wib.15.1333813717866; Sat, 07 Apr 2012 08:48:37 -0700 (PDT) Received: by 10.223.127.194 with HTTP; Sat, 7 Apr 2012 08:48:37 -0700 (PDT) In-Reply-To: <20120407153548.GC21452@uio.no> References: <20120406213725.GA12641@uio.no> <20120406222138.GB12641@uio.no> <1333811327.30705.4.camel@edumazet-laptop> <20120407153548.GC21452@uio.no> Date: Sat, 7 Apr 2012 08:48:37 -0700 Message-ID: From: Dave Taht To: "Steinar H. Gunderson" Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: quoted-printable Cc: bloat@lists.bufferbloat.net Subject: Re: [Bloat] Best practices for paced TCP on Linux? X-BeenThere: bloat@lists.bufferbloat.net X-Mailman-Version: 2.1.13 Precedence: list List-Id: General list for discussing Bufferbloat List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 07 Apr 2012 15:48:40 -0000 Incidentally, I need to correct something I said earlier, in that I noted that CS5 marking over ipv6 didn't survive the trip to NZ. It turned out that I'd changed the port number and wasn't marking that correctly. That reduces my data set for that statistic to 0. (it WAS 3AM, forgive me) I note that doing this marking internally at the event for wifi would be a bad thing due to the characteristics of the VI queue, but perhaps marking such for e2e externally on the tcp stream might help (and the survival rate of that marking particularly for ipv6 and 6in4,6to4) would be interesting too) for the port I was using... ip6tables -t mangle -I POSTROUTING -p udp -m multiport --ports 1234 -j DSCP --set-dscp-class CS5 would have been correct for the tcp streams in play here: ip6tables -t mangle -I POSTROUTING -o whatever_the_right_interface_is -p tcp -m multiport --ports 80,9094 -j DSCP --set-dscp-class CS5 iptables -t mangle -I POSTROUTING -o whatever_the_right_interface_is -p tcp -m multiport --ports 80,9094 -j DSCP --set-dscp-class CS5 On Sat, Apr 7, 2012 at 8:35 AM, Steinar H. Gunderson wrote: > On Sat, Apr 07, 2012 at 08:25:18AM -0700, Dave Taht wrote: >> The test HD tcp stream is up at >> >> http://cesur.tg12.gathering.org:9094/ > > That's the SD stream. http://stream.tg12.gathering.org/ has HD etc. > >> I'd like to look into what percentage of the failures I observed >> happened on the wifi hop vs the ethernet gateway >> since then many changes where made, and I'm low on sleep. (what do >> geeks do on a friday night?) > > FWIW, most of the users complaining don't have wifi in the mix at all. > >> I don't know if they are still trying sfqred or qfq in production - >> they worked! - but had little effect (as is to be kind of expected >> with the instantaneous queue length being so short and bandwidth so >> high on their first and nearest hops....) > > The one on cesur.tg12 has sfqred + my hacked VLC to do TCP pacing. > > The one on stream.tg12 has the oddest =93shaping=94 in a while; the 10Gig= E is > terminated in a Cisco 4948E which then has a 8x1GigE trunk out. We hope t= his > will smooth out the worst bursts a bit. > > /* Steinar */ > -- > Homepage: http://www.sesse.net/ --=20 Dave T=E4ht SKYPE: davetaht US Tel: 1-239-829-5608 http://www.bufferbloat.net