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auth=pass (PLAIN) smtp.auth=jgh@wizmail.org Received: from vgate18.wizint.net ([2a00:1940:107::1:2f:0] helo=lap.dom.ain) by wizmail.org (Exim 4.93.109) (TLS1.2) tls TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256 with esmtpsa id 1jHuj3-0005ZP-Ny for make-wifi-fast@lists.bufferbloat.net (return-path ); Fri, 27 Mar 2020 19:33:05 +0000 To: make-wifi-fast@lists.bufferbloat.net References: <1585335604.839628636@apps.rackspace.com> From: Jeremy Harris Autocrypt: addr=jgh@wizmail.org; prefer-encrypt=mutual; keydata= mQENBFWABsQBCADTFfb9EHGGiDel/iFzU0ag1RuoHfL/09z1y7iQlLynOAQTRRNwCWezmqpD p6zDFOf1Ldp0EdEQtUXva5g2lm3o56o+mnXrEQr11uZIcsfGIck7yV/y/17I7ApgXMPg/mcj ifOTM9C7+Ptghf3jUhj4ErYMFQLelBGEZZifnnAoHLOEAH70DENCI08PfYRRG6lZDB09nPW7 vVG8RbRUWjQyxQUWwXuq4gQohSFDqF4NE8zDHE/DgPJ/yFy+wFr2ab90DsE7vOYb42y95keK tTBp98/Y7/2xbzi8EYrXC+291dwZELMHnYLF5sO/fDcrDdwrde2cbZ+wtpJwtSYPNvVxABEB AAG0JkplcmVteSBIYXJyaXMgKG5vbmUpIDxqZ2hAd2l6bWFpbC5vcmc+iQFOBBMBCAA4FiEE qYbzpr1jd9hzCVjevOWMjOQfMt8FAl4WMuMCGwMFCwkIBwIGFQoJCAsCBBYCAwECHgECF4AA CgkQvOWMjOQfMt946ggAvqDr2jvVnGIN2Njnjl2iiKyw4dYdFzNhZgjTaryiV90BftUDxRsB uTVFUC6XU+B13MEgSK0zRDyI5NpEH+JTW539gWlmz2k2WTTmoBsm/js1ELoAjGr/i32SByqm 0fo3JPctn/lc7oTo0muGYvB5xWhTHRlcT9zGTRUb/6ucabVLiJUrcGhS1OqDGq7nvYQpFZdf Dj7hyyrCKrq6YUPRvoq3aWw/o6aPUN8gmJj+h4pB5dMbbNKm7umz4O3RHWceO9JCGYxfC4uh 0k85bgIVb4wtaljBW90YZRU/5zIjD6r2b6rluY55rLulsyT7xAqe14eE1AlRB1og/s4rUtRf 8LkBDQRVgAbEAQgA6YSx2ik6EbkfxO0x3qwYgow2rcAmhEzijk2Ns0QUKWkN9qfxdlyBi0vA nNu/oK2UikOmV9GTeOzvgBchRxfAx/dCF2RaSUd0W/M4F0/I5y19PAzN9XhAmR50cxYRpTpq ulgFJagdxigj1AmNnOHk0V8qFy7Xk8a1wmKI+Ocv2Jr5Wa5aJwTYzwQMh4jvyzc/le32bTbD ezf1xq5y23HTXzXfkg9RDZmyyfEb8spsYLk8gf5GvSXYxxyKEBCei9eugd4YXwh6bfIgtBj2 ZLYvSDJdDaCdNvYyZtyatahHHhAZ+R+UDBp+hauuIl8E7DtUzDVMKVsfKY71e8FSMYyPGQAR AQABiQEfBBgBAgAJBQJVgAbEAhsMAAoJELzljIzkHzLfTegH/Aktgk6zEBXYZBhLQV5i+Inw /FBxZAUQRpjPGS9n1lAU2V0/Jq3UTDiurXD5ylmgr1ryq9JJ7fe9I/w8gIBZh/IYDot8nLYo BXnFQ444pQHgiTKt/LNbWCmIiw2wXR1rXZAPbh2cKt5X3d0MXBBDt0GpkBfnTu4fIADl5Rvq aPOx5vhNMM+LMCAfPkt+yc68fbrtC0hQ3yQkyvkyChmuVJ/C8T8cqvVp5zQ4e9syuwYkYnZP 7ONCnDaHfNzTOB5/7Gxn8i2vLEtBdzBNEvqHEjDorv2RxzosKS2DW8Eye7LWcRrK4Llnk/T/ mpsWwP2JSveS3nbLcLzflnB2e3fvgK65AQ0EXiRPygEIAMP9Z2LRciWF8OoKUbcnA50W0U60 zTBvb7IMm0Rfaeb+s5vk0bX6Hel8i7dxmQvy0yUBrQq/9NYa90MOcm54b9oETtKHcoe63U3i iZc62ERe5dRIr9EG1DAN3SW5fRc5H234mskCdl06ftOJCsXLL1enbunWF8WYQpn8hzsoQqzs klloqd24z8c/+3C5cPjI26hyGFR0W5Q1T8xBMqxgc5W0smyyqDdDs/H1VXrxfQdculDXkM3B EUkeZMsyT7Q8jr8qHv13T1dPCyObP4wXkaOSEtOcBAeF2B1TUVUEhqPzXbG6+oZWgVUKWB8o oHReboJUCkQC8jAIZrr9xpgCMPMAEQEAAYkBPAQYAQgAJhYhBKmG86a9Y3fYcwlY3rzljIzk HzLfBQJeJE/KAhsMBQkB4TOAAAoJELzljIzkHzLfjg4IAM2GxIUaXLfO22z2JWS3byFvfRNS eXLZx2cDokn8AGpzTY+k5mcCkOQVUUz9MuxM50VnrRuBaeH++LfzSghKRWLx2PdJlKzThyFi y23NagSwx4i/R2J8xiPtajZm5SS3slEg1pt3NhgDkkrTQUTHYcf4F0O3YgdoqGKR7m10jqXz gzwQE65Pb0QUX5clxy55oV1pXoq1qjELIYVH9aS8bpI0RE86axHwpOvG4cQrMWZ0tg1txwZ/ DSstczlx7/Ptxfdd+A0x27UhS7ijUuqXx/z8Vh7U/oj/lsVERXyxuUgojD5kkagRLURuYBef CxJ/k6RTKs8juRsbVGfJMmNdfyK4OAReJFQPEgorBgEEAZdVAQUBAQdAPr/8EgFM8AkB/CZz +BGJIezPAdpTYFLvRhsem2GoBicDAQgHiQE8BBgBCAAmFiEEqYbzpr1jd9hzCVjevOWMjOQf Mt8FAl4kVA8CGwwFCQPCZwAACgkQvOWMjOQfMt99PAgApNBPoJog4UKuiP4YP4vvntA4etz8 z7WzVU4uI2ep7++qEaZOafHlSaUILaGag4CSh7KmxrTUjtoJNeX2qx5AQ4pdlNIjMy/V/Z+z 8gJ5vQ3tXglN4P7S6ud6mYKzpGHCvNF2CdzSRa2DRizCy6+sHOrDiH5V7veKE+9LjF+aB9lw PYLeF6Dh4idnxIa3aVwQjAAn3NBYAuhymnqgLgWcrPNaiSP6VIrsu4aCCoeIuc7bCFks6hrR x805g1J6uxixrMu2bW+AbPpRObi5B0pTJhDaLBW1xQgOiwYIAdyu0H2YNMrCBsA0w40UWEIz xrAkJFP/CS+qkjMI47FKq1EzbQ== Message-ID: <2c8c4565-799e-bf1c-707b-07fa9e00dc4f@wizmail.org> Date: Fri, 27 Mar 2020 19:33:03 +0000 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.6.0 MIME-Version: 1.0 In-Reply-To: <1585335604.839628636@apps.rackspace.com> Content-Type: text/plain; charset=utf-8 Content-Language: en-GB Content-Transfer-Encoding: 7bit X-Pcms-Received-Sender: vgate18.wizint.net ([2a00:1940:107::1:2f:0] helo=lap.dom.ain) with esmtpsa Subject: Re: [Make-wifi-fast] [Cake] mo bettah open source multi-party videoconferncing in an age of bloated uplinks? X-BeenThere: make-wifi-fast@lists.bufferbloat.net X-Mailman-Version: 2.1.20 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 27 Mar 2020 19:33:09 -0000 On 27/03/2020 19:00, David P. Reed wrote: > Now getting rid of bloat currently requires TCP to respond to congestion signalling. UDP in the kernel doesn't do that, and it doesn't tell userspace much either (you can try to detect packet drops in userspace, but coding that up is quite hard because the schdulers get in the way of measurement, and forget about ECN being seen in userspace) Ahem. man 7 ip :- IP_RECVTOS "If enabled, the IP_TOS ancillary message is passed with incoming packets. It contains a byte which specifies the Type of Service/Precedence field of the packet header." I'll grant the rest of your rant. -- Cheers, Jeremy