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 06DAF200B33 for ; Sat, 7 Apr 2012 11:56:36 -0700 (PDT) Received: by wgbge7 with SMTP id ge7so2470388wgb.28 for ; Sat, 07 Apr 2012 11:56:35 -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:content-transfer-encoding; bh=V3D2URnc/f59CDaV87ZV38aaElg528/XB+Vs+r/r0g4=; b=VXztgV60TNwmgVxSdGIQPngXfG6zr4whvJY9Ceh5RvUnHtGlD8yAQo9azOoEaGmVXe qcBQ9c6I8yzfxavCxaEXySdXtvROvP7tj6XFktoQTHzcKevbJLdX5neLYJoCIGRlVSrh C5hG7Svrz8MdABKh38J0MJ9SoSQ3I00KMKNTe3Vi4ytsgIuk9MuHeYRdQ4J926w8CZjz JS+EKZTDN2cumrxebMq11DZxezpgEM9w4o6IlBvImFmHnxz0J+ayhk97QYbZdkvPlZTz XRX3Detsm4mGdafmvUHVQGyCgg+zC/oQn0krxH2ZtZO3kHaOuZ/i+mn7/rTBD6UyhA3K O5WA== MIME-Version: 1.0 Received: by 10.180.88.199 with SMTP id bi7mr4633476wib.12.1333824995244; Sat, 07 Apr 2012 11:56:35 -0700 (PDT) Received: by 10.223.127.194 with HTTP; Sat, 7 Apr 2012 11:56:35 -0700 (PDT) In-Reply-To: <25AFF8A5-B8C8-4DD3-984D-0D08326395B8@gmail.com> References: <20120406213725.GA12641@uio.no> <20120406222138.GB12641@uio.no> <1333811327.30705.4.camel@edumazet-laptop> <20120407153548.GC21452@uio.no> <20120407181034.GD21452@uio.no> <25AFF8A5-B8C8-4DD3-984D-0D08326395B8@gmail.com> Date: Sat, 7 Apr 2012 11:56:35 -0700 Message-ID: From: Dave Taht To: Jonathan Morton Content-Type: text/plain; charset=ISO-8859-1 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 18:56:37 -0000 On Sat, Apr 7, 2012 at 11:27 AM, Jonathan Morton wr= ote: > > On 7 Apr, 2012, at 9:10 pm, Steinar H. Gunderson wrote: > >> Have you tried the one at cesur.tg12? It's pacing things out a bit more. > > After reducing my TCP *receive* window to 64KB, the 720p50 stream at the = main site is playing just fine - or at least it was, until the presenters j= ust came on for the "Grand Finale". =A0That was a very abrupt and well-sync= hronised change in performance, so there has to be something different ther= e. there was some great female singer/techno folk on earlier, I enjoyed it, even if I didn't speak the language. > > I appreciate, however, that a 64KB window requires a maximum of 100ms rou= nd-trip latency at 5Mbps, so that's not a solution for New Zealond. They are mostly dealing with far shorter rtts than that - a few ms in the hall (wifi, but with bufferbloat I imagine - I'd have liked to have got some captures ) a few dozen in the area -new zealand isn't their target market, playing with that and california was a way to see where the problem might be coming from. So it sounds like a less than 64k window is enough to cover much of europe at these speeds. > > =A0- Jonathan --=20 Dave T=E4ht SKYPE: davetaht US Tel: 1-239-829-5608 http://www.bufferbloat.net