From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from EUR04-DB3-obe.outbound.protection.outlook.com (mail-eopbgr60072.outbound.protection.outlook.com [40.107.6.72]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by lists.bufferbloat.net (Postfix) with ESMTPS id 2CAA73B2A4 for ; Wed, 24 Jun 2020 10:33:41 -0400 (EDT) ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=nQJwLV6frRav0hpwZ0KQ4jQ+SIRcqiRVqAnI4y5wI5QZq5LfdaYSS2O6znIJvFdMUkfMmbm25D3N4RA6kjva7b05qL+ZavePgzY+8IW0sWf7L8x9dmt2DXolgcWtLqqRoz4owD3/nPNDsRiZhmYzobSktZ4T5KMTp93qS/QnXzVN95ADWi9wws4QfnguRWl468moyEZzo5sn9aOp//2dUnd0o9PRN4VdeM6I76IU53Qz8Zcpu0QNqKGeJ3TpNNZlNkcdJPmY5PIZzmme6W4kb946iccGcSxVFEih7hqAv+OO4EPsAQ8AZxe+9D/9g54DTiiUWEz/PO4pjmmpnHIbkw== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=microsoft.com; s=arcselector9901; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=Nf+zLGGitorLbdW+lYls+344tD8VURSukfXtO3nKz9o=; b=J/GcEdZc3KMDiqkXRNQZJ30yYsLfsymyqDDG/crPUy6fpo50fGGHBTNIfFxtHagD/UE9ZLcjNELA63/aaWJcfeBiYXzguwZTPYu0KHSeRyC3jKnmjwVAmovqMYAWm64NVhJXuBC31Uk0GlxIxBovMZIFqqztmlARaxYZeYbXz+GCVBA+5DhEeVX2LX3Bp8Kftq+t5Yqh9b9nq/fljtwcM3PsGknQeMHZvo5hPwqZTP/98b8Cg8vrO+jPeGEwxSRwyuzxEQybb3DGuLengZsR76jRH8OZ+hk1tdmbEucXqO6TAuR8ozrI+WIFLKcaT5AI6n6nuio/gn+ztF1/Vq7sCA== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass smtp.mailfrom=darbyshire-bryant.me.uk; dmarc=pass action=none header.from=darbyshire-bryant.me.uk; dkim=pass header.d=darbyshire-bryant.me.uk; arc=none DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=darbyshire-bryant.me.uk; s=selector2; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=Nf+zLGGitorLbdW+lYls+344tD8VURSukfXtO3nKz9o=; b=PP0rOe5o6RxTYJJSCjjrTMIOksPzbrnCkII0PpgGb1Zloiq8hWEwFFVZcpJrz36r9l5oy8Is45OPpeRYoa+GYExEcSRucmb1nZT5b2GAnrU/xYJHdxUNvWVROtrsTayvs/aJGOmFRbfufKVLDj1UklgV9Q0u8bRYyKCyN6eSJwM= Received: from VI1PR03MB4575.eurprd03.prod.outlook.com (2603:10a6:803:59::12) by VI1PR03MB6528.eurprd03.prod.outlook.com (2603:10a6:800:19f::21) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.3109.22; Wed, 24 Jun 2020 14:33:39 +0000 Received: from VI1PR03MB4575.eurprd03.prod.outlook.com ([fe80::982d:7d6a:5f6f:74a2]) by VI1PR03MB4575.eurprd03.prod.outlook.com ([fe80::982d:7d6a:5f6f:74a2%4]) with mapi id 15.20.3109.027; Wed, 24 Jun 2020 14:33:39 +0000 From: Kevin Darbyshire-Bryant To: Cake List Thread-Topic: Why are target & interval increased on the reduced bandwidth tins? 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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 Jun 2020 14:33:41 -0000 --Apple-Mail=_EACD9CD9-DF64-4C14-B325-6BABCC169066 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=utf-8 Genuine question. For the reduced bandwidth tins in diffserv3/4/8 a = different rate and hence different target & interval values are also = calculated. I get why a target/interval calculation is desirable for = the =E2=80=98main=E2=80=99 tin - this forms a =E2=80=98best case=E2=80=99 = of how long each byte takes to transmit and is fundamental to the = shaper. What I=E2=80=99m less clear on is why increased targets & = intervals are used for the reduced threshold tins. To my mind it means those tins can be more =E2=80=98bursty=E2=80=99 = before codel jumps on them. That=E2=80=99s possibly ok on an egress = path but I=E2=80=99m not so convinced on an ingress path. Please point out the error in my thinking! Cheers, Kevin D-B gpg: 012C ACB2 28C6 C53E 9775 9123 B3A2 389B 9DE2 334A --Apple-Mail=_EACD9CD9-DF64-4C14-B325-6BABCC169066 Content-Transfer-Encoding: 7bit Content-Disposition: attachment; filename=signature.asc Content-Type: application/pgp-signature; name=signature.asc Content-Description: Message signed with OpenPGP -----BEGIN PGP SIGNATURE----- iQIzBAEBCAAdFiEEASyssijGxT6XdZEjs6I4m53iM0oFAl7zZEIACgkQs6I4m53i M0qDMQ//efK+vgWJHiHJVRsCspMuqQpFpqSpJFvjCW//QrZfY9ZJiDTYpPL480gQ SRGU++70oqqNsGeH5axe8mD0qmetZR5e+OgZnsPAWAGH8/wO/b38qpfw9sJ81wsM 4nYGczkIhkvB58FGlW42iALa71dviulgaifK7P8TCzUKydsx9OCVec3UQcNlJgLb Gw9jqFHB4SpixI3jr9YbQKXdQJLSyB1fdU3J/m23BAiih/S1sgSbivsEbQeEJQ8l mEsTUwn8/AtYUdGLNSCBdiRYmMn54eAEyUKtqFU7ReBjKuGYe9IlqO1IWxApzyd6 gfI3HTSFh3Bn3HJKbFD88GcXy+6GVfnwHDQS4fZOpJUkMXWGq8PaY52PyLwgc7F2 U5tejBg0DCvp/4OFykvTVG/igKDPGOmpuRi5FdzuUOQwmQ1o9+Q/i3ZjCB1RQ9Sq Q1TCACXKkh/BfGZELIV9OKj3p5E7iYaYt9euCdbb8k0PDLKW1u8V8mN3YHlCSbHV QUY2VrWwN+JxSgm0d/tfPCqIRE185yycwX5VUAPseBogFGkv6Fj21Wqt3wnIeKt/ ZtQhB7b2PnkRLzRJlY2TrEDKcxG7j/Sn0G4qoQmlNbYV5Szmfa9CiKzpmoio+gPt 6lnG5EFg1O5x+f8W08bF/24CRugv//iwewwX08/7XqgSxJTKtYg= =dMiX -----END PGP SIGNATURE----- --Apple-Mail=_EACD9CD9-DF64-4C14-B325-6BABCC169066--