From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-wm0-x229.google.com (mail-wm0-x229.google.com [IPv6:2a00:1450:400c:c09::229]) (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 9865F3B25E for ; Wed, 24 Aug 2016 15:47:54 -0400 (EDT) Received: by mail-wm0-x229.google.com with SMTP id q128so213083010wma.1 for ; Wed, 24 Aug 2016 12:47:54 -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=Gq1f+8lkCGmGpcEWsp5MWgNt2hpZyqhEHiPK0T3yd4I=; b=wEaB/niDJ3ADwcuimWXcZo8ia6k04jbcNN5MjEz6Tx76Hc8OOSnNYexr78VrlaoCH9 yf+Z7Qg9GRlWleJsWOKX8PQxD83hrf8GI/naLw2fZuYJ36n2Qhlh1DQVTsxq4ArNlHq1 SRuCEJz87vcomPRWO85MjruOdi5LLsRfhRMmvdg8DiW4wOWi1lBPyC+GRImF+dYN1ii5 f5uF0d9DsKMCDklt9QnqDx6TjZMJh9Mu/97aakj3UumLQudLTi0WGZr+fCnnWUftIF8f vrJITLxgsj44aFlXsf8v/KwytZpKJsPFecRinMGwfiPnVrYcm8COzv4A8leqxqgbYgIC C0KA== 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=Gq1f+8lkCGmGpcEWsp5MWgNt2hpZyqhEHiPK0T3yd4I=; b=c4JXm7A78TfXvzN+WtCYS8W9VvonaUF8E/tYSaFOv49vwwflhVsVlBKwgb1aIU2Ukc nfGWlrGLccs0ucU/kuaEcyzbbzMVgvrW+T7/Tqh26N5lF0jbUyZIkN3ogR3CW/oYNr6B WPdqlaJTJ6WBLZ2B3AwdfXz1pyDVEV4J/Yc0oAtnlzAirxOFTknPeaLca2pgMX1bFarn EFeZN7L0jIAVirruPrwATSApa3YCockISnC7rg83HPLX5O72hCszJVy44Qd4IvnjB108 UhAHPSeVAEQJxKPB2q5IXxroe7IKej3raoYKpFrYeGhvn0izK4eopDTcnVOt7+p8/Jad G7ZA== X-Gm-Message-State: AE9vXwOt+CUu8AkPnKKA2sWht66Yhujjtb9FPviQe1W6tIuaJjU27hSFm7/H8FNF66CvJA== X-Received: by 10.28.141.6 with SMTP id p6mr4788057wmd.110.1472068073155; Wed, 24 Aug 2016 12:47:53 -0700 (PDT) Received: from localhost.localdomain (host-89-243-172-136.as13285.net. [89.243.172.136]) by smtp.googlemail.com with ESMTPSA id i3sm11539080wjd.31.2016.08.24.12.47.51 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Wed, 24 Aug 2016 12:47:52 -0700 (PDT) To: "techicist@gmail.com" , cake@lists.bufferbloat.net References: <96AE5B3F-FDD6-455E-BB08-D4A162EC3F23@gmx.de> From: Alan Jenkins Message-ID: Date: Wed, 24 Aug 2016 20:47:50 +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="------------9B6EC661DB90B0E362C4CCC7" 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 19:47:54 -0000 This is a multi-part message in MIME format. --------------9B6EC661DB90B0E362C4CCC7 Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 8bit 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. 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 --------------9B6EC661DB90B0E362C4CCC7 Content-Type: text/html; charset=utf-8 Content-Transfer-Encoding: 8bit

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.  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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