From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-yh0-x22c.google.com (mail-yh0-x22c.google.com [IPv6:2607:f8b0:4002:c01::22c]) (using TLSv1 with cipher RC4-SHA (128/128 bits)) (Client CN "smtp.gmail.com", Issuer "Google Internet Authority G2" (verified OK)) by huchra.bufferbloat.net (Postfix) with ESMTPS id 603B521F553; Tue, 16 Jun 2015 23:25:19 -0700 (PDT) Received: by yhan67 with SMTP id n67so27045909yha.3; Tue, 16 Jun 2015 23:25:19 -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; bh=1eIyrdYOfgVQT6C600wlN8GgaWEi/h1VnbxtQfT8ZvM=; b=XppLf3mr5POKweegqibprK9g8bBEjjy6rXQBEVgB18Xg8DPzCr4rwOGHlndSiW282A ItPCzAkMv/n/ozfoE2Cra5VoxlDDa6DXVo0bpveWtP+vBbyqrqNCzNVUQDs/u8w0YRre Lto2x5lzwRY6e6WsKplcIl/P3OtTvYBODDLopJ5O978Nc+M/gjldZOH9h+TpsaREw2NT kjUCWtpswWSf4kp1k3OYrbEU4hIwYsmHh83lhGM9wPF3uj4TG6if2sSxmRFKR/dBhhJL wK3mcJOwqkCSJdws8fF54zxFaxaHMRd43XxYwIYNN8gU1zID7mPNz5i/PDBiuWS/9Sjm Df+g== MIME-Version: 1.0 X-Received: by 10.52.88.111 with SMTP id bf15mr3663082vdb.20.1434522318961; Tue, 16 Jun 2015 23:25:18 -0700 (PDT) Received: by 10.52.12.167 with HTTP; Tue, 16 Jun 2015 23:25:18 -0700 (PDT) Received: by 10.52.12.167 with HTTP; Tue, 16 Jun 2015 23:25:18 -0700 (PDT) In-Reply-To: References: <00270BE3-4932-4294-8917-8A9C2B462FCF@gmail.com> Date: Wed, 17 Jun 2015 09:25:18 +0300 Message-ID: From: Jonathan Morton To: Dave Taht Content-Type: multipart/alternative; boundary=20cf307cfbe63e84a10518b0c1ec Cc: cake@lists.bufferbloat.net, "codel@lists.bufferbloat.net" , bloat Subject: Re: [Codel] [Cake] Today's cake X-BeenThere: codel@lists.bufferbloat.net X-Mailman-Version: 2.1.13 Precedence: list List-Id: CoDel AQM discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 17 Jun 2015 06:25:48 -0000 --20cf307cfbe63e84a10518b0c1ec Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable >> The =E2=80=9C50 up 1 down asymmetric=E2=80=9D test now produces the desi= red results for the download stream *without* the need to prioritise the acks; Codel now reaches a steady-ish state where it drops enough of them to keep everything moving, and this leaves more bandwidth in the up direction for the 50 streams. >> >> The version of that test with a prioritised download stream reveals that quite a lot of drops (as well as marks) are still occurring in the 50 streams. This, to my mind, is a sign of too much aggression in the switch from marking to dropping, but I need to work out the numbers to be more confident about adjusting that. > >k. What bandwidth? 100/10 Mbit, no added latency, on a LAN. I should also check what happens when I add a little latency to the mix. - Jonathan Morton --20cf307cfbe63e84a10518b0c1ec Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable

>> The =E2=80=9C50 up 1 down asymmetric=E2=80=9D test = now produces the desired results for the download stream *without* the need= to prioritise the acks; Codel now reaches a steady-ish state where it drop= s enough of them to keep everything moving, and this leaves more bandwidth = in the up direction for the 50 streams.
>>
>> The version of that test with a prioritised download stream reveal= s that quite a lot of drops (as well as marks) are still occurring in the 5= 0 streams.=C2=A0 This, to my mind, is a sign of too much aggression in the = switch from marking to dropping, but I need to work out the numbers to be m= ore confident about adjusting that.
>
>k. What bandwidth?

100/10 Mbit, no added latency, on a LAN.

I should also check what happens when I add a little latency= to the mix.

- Jonathan Morton

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