From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-lj1-x230.google.com (mail-lj1-x230.google.com [IPv6:2a00:1450:4864:20::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 2F9DB3CB40 for ; Tue, 2 Jan 2024 16:57:33 -0500 (EST) Received: by mail-lj1-x230.google.com with SMTP id 38308e7fff4ca-2ccc5fca3f6so73777081fa.1 for ; Tue, 02 Jan 2024 13:57:33 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1704232652; x=1704837452; darn=lists.bufferbloat.net; h=to:references:message-id:content-transfer-encoding:cc:date :in-reply-to:from:subject:mime-version:from:to:cc:subject:date :message-id:reply-to; bh=qf9qvILAQTQOFz0tnoZUbu+wZSa22/kGSBfUvOMgXOI=; b=fc9RhWdMuIeRmvgqIv53HEEbCG4VCsVuC4WmymgFlDmPKsNUyW/Ba/I5B6Q1B4/bXn nWzMf1/Afhjy47WfNRl27EHSpaIYgoGP+G4+h1kjpWIjcaoftadYW8qkh3180gg0oJEM 2aj6zvnQGKx1tvlEcm23D98NZmj+FVKTyPk8JHPIQEVa/1sFVR59FeQzg415+paQM71h PJ0u2Zg+n7ZCC5y8Ik5sMVdMKerHxgRZk5VvDHN+j0TUwx4GBQqNw1xDzJLrcSjCYa7R s5DZdTo7nr4uZ3OesHTeBC9U/VMJg0o9pumDdO3Oc/xWpCvaGMcHS9O9NGM6SPyuXtld zMLg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1704232652; x=1704837452; h=to:references:message-id:content-transfer-encoding:cc:date :in-reply-to:from:subject:mime-version:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=qf9qvILAQTQOFz0tnoZUbu+wZSa22/kGSBfUvOMgXOI=; b=o42uaulN24SyslzkK7JmCydUz1ilsSrWmBb2lv36TBBW2gqloW4SDlSxZ90g81MXP7 2UYY5e023QqKDIpLCJxb1PKIF1QXRLKxHSKZYn2alDKY2AJCEC+gZAyFEmU5SJT1iZwa 8KeGSjKs4QkCY5JnehDUPs0I0bu+KFMg+2UbKLImrdm7NPQITeQItlakfPRPHRL7VCYc XnXsfarQewAOfwrPo+rjKlV5EtynWb9jjb2uJckv0Kp5Eyg4xqUi6V3MzFokNpQqHnGX zyufM3aDlponyQNFoRUUknIRM5LOdOKuYbNRtKOtaynFDvPRaJbg+KAcL6lGX9A8go2l LL+A== X-Gm-Message-State: AOJu0YwmpmJ/jXTXfBNzKxYAwtl+4xOS5bFJe/96o++yqUAfquVw5fab kcvIInxcIoVgd+sodaRx8sk= X-Google-Smtp-Source: AGHT+IFe+x4eo2nU5X8ZiEcei3EQVSsgDsA9eKwNbXVAgV5S0hqNFNRMIZJzh5+85431YGll8G1pUA== X-Received: by 2002:a2e:8606:0:b0:2cc:6bbf:ea95 with SMTP id a6-20020a2e8606000000b002cc6bbfea95mr7328830lji.62.1704232651453; Tue, 02 Jan 2024 13:57:31 -0800 (PST) Received: from smtpclient.apple (37-219-218-208.nat.bb.dnainternet.fi. [37.219.218.208]) by smtp.gmail.com with ESMTPSA id h5-20020a2ebc85000000b002ccd49fa5a9sm3436245ljf.19.2024.01.02.13.57.30 (version=TLS1_2 cipher=ECDHE-ECDSA-AES128-GCM-SHA256 bits=128/128); Tue, 02 Jan 2024 13:57:31 -0800 (PST) Content-Type: text/plain; charset=utf-8 Mime-Version: 1.0 (Mac OS X Mail 14.0 \(3654.100.0.2.22\)) From: Jonathan Morton In-Reply-To: Date: Tue, 2 Jan 2024 23:57:29 +0200 Cc: Cake List Content-Transfer-Encoding: quoted-printable Message-Id: <18F24CCC-76E3-4FB0-AE62-BAAAFDEDB2EC@gmail.com> References: To: dave seddon X-Mailer: Apple Mail (2.3654.100.0.2.22) Subject: Re: [Cake] Ubiquity (Unifi ) Smart Queues 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: Tue, 02 Jan 2024 21:57:33 -0000 > On 2 Jan, 2024, at 8:59 pm, dave seddon via Cake = wrote: >=20 > =E2=80=A2 I'm not really sure what "overlimits" means or what = that does, and tried looking this up, but I guess the kernel source is = likely the "best" documentation for this. Maybe this means it's = dropping? Or is it ECN? Overlimit just means the shaper in HTB is restricting the flow, thus = doing something useful. Drop means the AQM is working to provide = congestion information to a Not-ECT flow. Those numbers look normal = (about 0.2% drop rate, and most packets hitting "overlimit" when the = link is saturated). Using fq_codel's default parameters is not a bad thing at all. I'd much = rather they did that, thereby using numbers that are tuned for general = Internet conditions, than try to change that tuning in ignorance of the = end-user's actual network environment. Most end-users have their WAN = port facing "general Internet conditions" anyway. > Apparently rather than applying the tc qdsic on the outbound path on = the LAN side ( eth0 ), they are applying it inbound on the the eth2 via = ifb_eth2. That's the correct place to do it, so that the qdisc applies = specifically to traffic coming from the WAN. If you apply it to the LAN = egress, it tends to affect traffic coming through the router from the = WiFi or its internal servers, which is not desirable. These are all questions we've considered at length in the process of = developing and deploying Cake and other SQM solutions. - Jonathan Morton=