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protocol="application/pgp-signature"; micalg=pgp-sha256 MIME-Version: 1.0 X-OriginatorOrg: darbyshire-bryant.me.uk X-MS-Exchange-CrossTenant-Network-Message-Id: 8f01fcef-faec-4a83-dad6-08d7f25c5db0 X-MS-Exchange-CrossTenant-originalarrivaltime: 07 May 2020 07:58:01.8599 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 9151708b-c553-406f-8e56-694f435154a4 X-MS-Exchange-CrossTenant-mailboxtype: HOSTED X-MS-Exchange-CrossTenant-userprincipalname: oEx+HfBWDeODJYRnX3JeDP/tUkeTx4wmT6VZREOoq63LAaWKrzO82rr2J5H6wQAe7r0HKw8KcNwx5NXQgbl9xxouHhhXHnoVjIOVWRyUAYE= X-MS-Exchange-Transport-CrossTenantHeadersStamped: VI1PR03MB3949 Subject: [Cake] Latency target curiosity 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: Thu, 07 May 2020 07:58:04 -0000 --Apple-Mail=_BB413CAD-01EE-4BF6-8D86-AFDB67EC3C8D Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=utf-8 Hi All, As some of you are aware, I=E2=80=99ve been working on =E2=80=99near = live=E2=80=99 graphing of Cake=E2=80=99s stats under Openwrt, basically = taking the output of =E2=80=99tc -s -j qdisc foo=E2=80=99 and putting in = relevant graphs. A curiosity has arisen: I use diffserv4 mode on a 20Mbit egress link. = Bulk tin has =E2=80=98capacity=E2=80=99 threshold of 1.2Mbit and because = it=E2=80=99s a slow =E2=80=99tin', the default target & interval values = get overridden to 14.6ms and 109.6ms respectively. The 3 other tins are = 5ms & 100ms defaults. I have a backup job that bulk uploads 5 simultaneous flows to Onedrive. = The sparse_delay, average_delay & peak_delay figures settle on 32, 38 & = 43 ms respectively with around 9 drops per second on that tin. I=E2=80=99m curious as to why the reported delays are over double the = target latency? Cheers, Kevin D-B gpg: 012C ACB2 28C6 C53E 9775 9123 B3A2 389B 9DE2 334A --Apple-Mail=_BB413CAD-01EE-4BF6-8D86-AFDB67EC3C8D 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----- iQIzBAEBCAAdFiEEASyssijGxT6XdZEjs6I4m53iM0oFAl6zv4gACgkQs6I4m53i M0qtkg/+LJ1iG8Zv6uDOdtJq/j8HHDObV/tM6chwDKbXgpFhful+GVHBl1pBKbVd EgePpfTX8pDdB1TinmSbM8kqJLi9oc/Fn1u5loSTNlVOFHV4kCRkfvoiksqRhW/W osV5vJ+HyzTJ758pRCDjw3Ov8BEdNuy7tL+sVZzaxAvpvlDHnLeQo0IqwPUaxeP0 M+9XUqF7EENqwDdBQgYqpGklUMAFkFfJHOM9V8gGHiUnE53+kuFG0cJQ9MHTa+79 UCtg7HVxrrYnCcgLF5hVdGjayBm3unEQ5YMW0mnE0Q3yTSG5vyr1BuZSn8xx1lFB qqS62bcpOJdKGhEHbXJ4WpCn3uvt6C8izIQ+BYTxucZnXDWa3HbD6WbRz1ULSuGw Nk2nY5uRxZW9Lsb5708LmbN1hP6E25EJY0Y4Z/sYH18khHEWe4f35LMx3r3cS4Uj oOHp5rwNWp8ITKQUzJp8ViH92PpL3hBx2T7AbaQuwJxs1AKnqWJCajbOZ61b01Xy uWPlmscmKkFpwd0qSP09D/gXQV5jkPjsaUKLVPOF4bJUb/ja+yRIyF+tUz69n4pT UIuNvw1aSLHTQZiqVoo0R7d+SwzXC5MCRW2VWLB/pW9HwLy+GxpsTscQfmV7uVs6 49RJjVJl/KURca3kFty3yxg8BaCubbMwa+Uynu1gRMMDxZM8Hao= =moG1 -----END PGP SIGNATURE----- --Apple-Mail=_BB413CAD-01EE-4BF6-8D86-AFDB67EC3C8D--