From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-wm0-x230.google.com (mail-wm0-x230.google.com [IPv6:2a00:1450:400c:c09::230]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by lists.bufferbloat.net (Postfix) with ESMTPS id F06843B25E for ; Wed, 24 Aug 2016 15:49:44 -0400 (EDT) Received: by mail-wm0-x230.google.com with SMTP id f65so212324741wmi.0 for ; Wed, 24 Aug 2016 12:49:44 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=subject:to:references:from:message-id:date:user-agent:mime-version :in-reply-to; bh=CbQ8nVcHMQsjL79Dcq+M88e5MWz8Dh1pPBYpy3jr1lY=; b=vQgTLySH9JtTJA83NZ8sr5yX/ma+VMKLQxdBrTvcCTrv5afCuoT+9CuI0+6BIi6RRW fCEff1JtYr9XGHLwRMr/VTZtzjAXgZz+VG90gGy8LqjJOeIkFqWTvGGs1v8spglnxs36 yoQEdSKDH5uf9Uc6OXIDgM2ICS7XcnauAezDPFpMX8K+Uv4U85jdnpmmgbA9NX5nlpDq 9MVfaWIX6FYfLtGTiLrt+WQQwdrPIqWwXK0T53pGawKV5EAA+If4PwlqhyvBU+DGhtcO UuFAAlo9bialIBOEHnMv0IQ99ZjFAKFyi/sEJ5+R4028euYaJ5/E8V+DuxigEAgrcAFy 6+Lw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:subject:to:references:from:message-id:date :user-agent:mime-version:in-reply-to; bh=CbQ8nVcHMQsjL79Dcq+M88e5MWz8Dh1pPBYpy3jr1lY=; b=Xrse3fZ2MpnWRZluyaR9cbySY+TYKz9FIY1BkTaIZC7eKVjn/ZLbssx+S215jNZBn7 7scrKwTmXAQXDrIaAUOLBLuZafy9i43Z+IQnVG10irCDjHiIV23700E26plQuS3UZ4gg ivIi/YCZydW/KDizvr91PCcQPeP0lmaI23O2QxA6LuD0LRUw0eNcak2uX4bIsebHo4mn ncCzpqceBi80rTRlifMl4tbv0lm5TUtl5cmyYlR3KkB9H2HiLVFwzfWmgn0K7r/gaNaw JKS+NIb14sGxPdKa1Yv37Kk88Aj+U4jKrN+xTl6PfETZ+qi+yOqtDMD2Lt+y8tFBIwDk jccA== X-Gm-Message-State: AEkoous4t44SuIZfH9HVItf279ShX8zlMaA8SL6XvkIt0d2RAuloCeinkWNOx9ZDg3770A== X-Received: by 10.194.140.35 with SMTP id rd3mr4580192wjb.88.1472068184031; Wed, 24 Aug 2016 12:49:44 -0700 (PDT) Received: from localhost.localdomain (host-89-243-172-136.as13285.net. [89.243.172.136]) by smtp.googlemail.com with ESMTPSA id x203sm35155052wmg.0.2016.08.24.12.49.42 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Wed, 24 Aug 2016 12:49:43 -0700 (PDT) To: "techicist@gmail.com" , cake@lists.bufferbloat.net References: <96AE5B3F-FDD6-455E-BB08-D4A162EC3F23@gmx.de> From: Alan Jenkins Message-ID: <3ed1004a-d688-11ec-c788-d8a456b22b34@gmail.com> Date: Wed, 24 Aug 2016 20:49:42 +0100 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Thunderbird/45.2.0 MIME-Version: 1.0 In-Reply-To: Content-Type: multipart/alternative; boundary="------------F157A6273B2310CBB2E8DAEE" Subject: Re: [Cake] Configuring cake for VDSL2 bridged connection X-BeenThere: cake@lists.bufferbloat.net X-Mailman-Version: 2.1.20 Precedence: list List-Id: Cake - FQ_codel the next generation List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 24 Aug 2016 19:49:45 -0000 This is a multi-part message in MIME format. --------------F157A6273B2310CBB2E8DAEE Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 8bit On 24/08/16 20:47, Alan Jenkins wrote: > So you can read off (+calculate) overall throughput, in both directions. > > And it looks like your latency under load rises by only about 2ms. > That's the sort of thing we're aiming for. > > Pure codel aims for 5ms, so I take it you're using fq_codel. /reads subject line or using standard cake, and not passing `flowblind` to disable the fair queuing > And... yes > > (1500 * 8) / 4_000_000 = 0.003 > > It takes 3ms to transmit a full packet in the slower direction. So > when it's busy, ping can be delayed on average by 1.5ms (while the > current packet is transmitted). Something like that anyway. > > > On 24/08/16 20:33, techicist@gmail.com wrote: >> Thanks for the reply. I understand now 😀 >> >> What can be taken from these graphs? I'm afraid I really am lost now. >> >> >> >> _______________________________________________ >> Cake mailing list >> Cake@lists.bufferbloat.net >> https://lists.bufferbloat.net/listinfo/cake > > --------------F157A6273B2310CBB2E8DAEE Content-Type: text/html; charset=utf-8 Content-Transfer-Encoding: 8bit On 24/08/16 20:47, Alan Jenkins wrote:
So you can read off (+calculate) overall throughput, in both directions.

And it looks like your latency under load rises by only about 2ms.  That's the sort of thing we're aiming for.

Pure codel aims for 5ms, so I take it you're using fq_codel.
/reads subject line

or using standard cake, and not passing `flowblind` to disable the fair queuing

And... yes

(1500 * 8) / 4_000_000 = 0.003

It takes 3ms to transmit a full packet in the slower direction. So when it's busy, ping can be delayed on average by 1.5ms (while the current packet is transmitted).  Something like that anyway.


On 24/08/16 20:33, techicist@gmail.com wrote:
Thanks for the reply. I understand now 😀

What can be taken from these graphs? I'm afraid I really am lost now.



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