From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-wr0-x22e.google.com (mail-wr0-x22e.google.com [IPv6:2a00:1450:400c:c0c::22e]) (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 49D753CB4B for ; Sat, 21 Apr 2018 04:44:23 -0400 (EDT) Received: by mail-wr0-x22e.google.com with SMTP id q3-v6so18484735wrj.6 for ; Sat, 21 Apr 2018 01:44:23 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=eventide.io; s=google; h=mime-version:subject:from:in-reply-to:date:cc :content-transfer-encoding:message-id:references:to; bh=8jt+VFwBkw2dWzmbPt8t+hgKqIebO9hwlchaoXyg/2M=; b=FD+xilK2Ya0DKNia0kQ+P4cKzCgz5B9sSxRICbxqYcD3cEJg7lWEX8H37DFMri+01C 4zh9AGgiTKleH6Ujm9jYXD3J9kOavyDHreHUJzzr/Y2sKtCOS6vcXxd4rlvUaKPHH6XJ 7I7DiouQFcjPbwSh0ShWAZOxL8A7X4jhYcvPheq4xGZ0oN9FT3TvwCPoZMF0RRzPXzFh BNrkhBKQGLeVHCBb44jlYwq7PO+81ZNM7oT2SVoUOvYOxMQedrmj/OnFfUoRTK5aeu/3 Dc56JJAAnxInKB8JPrGPitu1DMcF6JHxWFEoie8j/BVXnbQPWkORLsXENd+9LgitbUua +LPQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:subject:from:in-reply-to:date:cc :content-transfer-encoding:message-id:references:to; bh=8jt+VFwBkw2dWzmbPt8t+hgKqIebO9hwlchaoXyg/2M=; b=GaELpxiYgCKYiqnxzwH5FGKDUQoCvYcAH0LRPFU6nl158s7zmOHu/OVavpkwZPuaW+ DpOhMCqrR410jhkW/989zPoGW0x56cdoxCrQgpjMLWFNLUhCjCdzidvsxNSzLPu5fUxg 6iUPs39FtSPEOlcjGuTg0V+pe4ysF64GP2fDGlfZIgq1ruELsU4DbYjcB1meawpUKIh4 4Y4hIS9nvH70fy/6VUJFutq3u4zD5D1zBR+4nFqrXLxmuWyU6f3C3FdNJdCKhLHi6Q8v NWfKDlBShqX6G2LYb4nNnkpYSBnkr+MK8/gLtko7HiUlY2Qp2w4+2kwX0sJpn2RGE9Qj +/SA== X-Gm-Message-State: ALQs6tB2Bqu4grx3ootuVG3iiuiuZuslRImCeCknoONJE6g8U8Vg3kE0 qFaV2GjmsYDGn7X/dWj7upK3oh+eF0I= X-Google-Smtp-Source: AIpwx4/81Hh1VzYEQl3YWbxUQ2vSOIsVK7gFYKeKzQBf5QLFrv0qzWmNUtjJ5wTQbpfzUUEprCTFNg== X-Received: by 2002:adf:8143:: with SMTP id 61-v6mr10610016wrm.240.1524300261684; Sat, 21 Apr 2018 01:44:21 -0700 (PDT) Received: from tron.luk.eventide.io (h-1169.lbcfree.net. [185.193.85.130]) by smtp.gmail.com with ESMTPSA id 72sm5878876wmu.38.2018.04.21.01.44.20 (version=TLS1 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Sat, 21 Apr 2018 01:44:21 -0700 (PDT) Content-Type: text/plain; charset=utf-8 Mime-Version: 1.0 (Mac OS X Mail 9.3 \(3124\)) From: Pete Heist In-Reply-To: <87k1t38d2q.fsf@toke.dk> Date: Sat, 21 Apr 2018 10:44:19 +0200 Cc: cake@lists.bufferbloat.net Content-Transfer-Encoding: quoted-printable Message-Id: References: <87k1t38d2q.fsf@toke.dk> To: =?utf-8?Q?Toke_H=C3=B8iland-J=C3=B8rgensen?= X-Mailer: Apple Mail (2.3124) Subject: Re: [Cake] Diffserv LLT mode 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: Sat, 21 Apr 2018 08:44:23 -0000 > On Apr 19, 2018, at 4:50 PM, Toke H=C3=B8iland-J=C3=B8rgensen = wrote: >=20 > Is anyone actually using the LLT diffserv setting? I re-tested diffserv-llt quickly using the current head of cake and = tc-adv and am confused by something: = http://drhleny.cz/bufferbloat/cake/round5/diffserv_rrul_eg_cake_ds-llt_50m= bit/index.html When I look at the qdisc stats for cake, there are 5 tins: Low Loss, = Best Effort, Low Delay, Bulk and Net Control. Shouldn=E2=80=99t the Low = Delay tin have its target and interval reduced to something below 5ms = and 100ms? And the bulk tin has a target and interval of 5.8ms and = 100.8ms(?) In short, I forget how diffserv-llt was supposed to work, regardless of = whether or not it=E2=80=99s on the chopping block. No need for a history = lesson if it will be removed=E2=80=A6 :) Improved intra-flow latency could be useful for HTTP/2 or other things, = but I don=E2=80=99t see how the current llt mode helps most ordinary = people with that, when it would only apply to flows with certain = diffserv markings, and doesn=E2=80=99t seem to adjust the target and = interval anyway=E2=80=A6=