From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-pg1-x533.google.com (mail-pg1-x533.google.com [IPv6:2607:f8b0:4864:20::533]) (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 715193B29E for ; Fri, 8 Sep 2023 13:00:19 -0400 (EDT) Received: by mail-pg1-x533.google.com with SMTP id 41be03b00d2f7-56a55c0f8b1so1797091a12.0 for ; Fri, 08 Sep 2023 10:00:19 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20221208; t=1694192418; x=1694797218; darn=lists.bufferbloat.net; h=to:subject:message-id:date:from:mime-version:from:to:cc:subject :date:message-id:reply-to; bh=tSg3jw8XrIxoMMsPuN2aqomspQsE4JO5Rwh73xoG/pY=; b=B0HeppLi8PTMy/rysd6UCG7By9/FDy4NkWgPuuw4waHzC6iTixqyHsCFfvCbX3OX43 3X7HODUD50RJ8kT4RmYPFYhoY8ALU+rfj6EkXyfAKUEEijLeAM5TlgAKdVQ8WuSQ3kRT 1aziP2J7McrZgDkAnaHdH78lccWHixx5pAsTD89Y/j8/4sNwJ1SCb8NBPELxReAZFCXi O+60R5Ww1p7K2UvpkQTOBOpUZWZbJtLZJqDhItH5CpvTn58SKcR4dbkVNa4F5sW1KGud PQM5kniiPARl1y5LpMVMBYlV5nhS9vwOhLWc7atXmsC23TzDjR+kqYm3hY441x87WVEu /SMw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1694192418; x=1694797218; h=to:subject:message-id:date:from:mime-version:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=tSg3jw8XrIxoMMsPuN2aqomspQsE4JO5Rwh73xoG/pY=; b=nQY7BNOAU9OcfVdFpGFosjOBZx1At4S2d0TVkDZFvC8BceTHA9K2WfT6Rak0C25q8W c2sNbBeUeRgJ4MbP/3ggKQHsEtmxD4TbbBNyJ5rLXhc3b3yZZcK5o/HH3w6jo0bGprU2 6b2rrSLBjSDGbrJWxpd4AsEyXSqdVGuVvOLPrM5kSeEDXemQbkzH95xqN+yJgsxuvrEu bw+DWayjMsyJdqqIUOmfRziFFMQtoe45FcVCsZ10KNVlFp8hmCBWIzXHqTCOx+3fV4Vz r+qH5Fdd50rKPi5vC1MWamY2bhomJhWd9nOW+vM4RXXuDLzVfURGVxUzov0jiAXevnjN pzhQ== X-Gm-Message-State: AOJu0YwcfndK8Wys2LxY/Do3TA3AxAPezqLVh3rSQFfqz9uPwiGRpHSs 2+ynZCD2o2oSjw9kSKj+f7ordixuj3XPqbPSQgS0FUD+cZw= X-Google-Smtp-Source: AGHT+IEjHNzTtH23j87IySmjGOBK4Lq86hPDpA7C+XPkb2p8ekgHvjCbMb7Xu1JjGmSjuegwhISLabAUk+dHVTo1BGQ= X-Received: by 2002:a05:6a21:4982:b0:14c:7800:f3f4 with SMTP id ax2-20020a056a21498200b0014c7800f3f4mr3044790pzc.36.1694192417838; Fri, 08 Sep 2023 10:00:17 -0700 (PDT) MIME-Version: 1.0 From: Dave Taht Date: Fri, 8 Sep 2023 10:00:06 -0700 Message-ID: To: Dave Taht via Starlink Content-Type: multipart/alternative; boundary="0000000000003f1bcb0604dbe9a6" Subject: [Starlink] cross layer queue management X-BeenThere: starlink@lists.bufferbloat.net X-Mailman-Version: 2.1.20 Precedence: list List-Id: "Starlink has bufferbloat. Bad." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 08 Sep 2023 17:00:19 -0000 --0000000000003f1bcb0604dbe9a6 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Over here we have been having a great deal of fun speculating about some increasingly researchy ideas for the cake queuing discipline, and in the last section, discussing at more length means to cope with the 40ms, 15s bump (or bang) presently in there while preserving correct behavior of existing congestion controls. Some great comments are here: https://docs.google.com/document/d/1tTYBPeaRdCO9AGTGQCpoiuLORQzN_bG3TAkEolJ= Ph28/edit so many unknowns! One of the things we learned from the initial teardowns of the dishy was that it has a ntpd supported GPS chip, which means the dishy could be supplying really accurate time via ntp or pptp to routers downstream of it. It would be cool if it did that, but so far as I know, still doesn=C2=B4t. = A precisely synced router could more smartly buffer and drop packets. How likely is it for this reconfiguration interval to remain a thing? I=C2= =B4d hate to burn the time coding up the concept (and slaving a router to another time sync source - I still have a couple of the 1 pps gps dongles we built as part of the thumbgps project lying around, more than a few people here have gps on their raspi hats) only to see it vanish, as much as I would like it to vanish. --=20 Oct 30: https://netdevconf.info/0x17/news/the-maestro-and-the-music-bof.htm= l Dave T=C3=A4ht CSO, LibreQos --0000000000003f1bcb0604dbe9a6 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable
Over here we have been having a great deal of fun spe= culating about some increasingly researchy ideas for the cake queuing disci= pline, and in the last section, discussing at more length means to cope wit= h the 40ms, 15s bump (or bang) presently in there while preserving correct = behavior of existing congestion controls. Some great comments are here:

so many unknowns!=C2=A0

One of th= e things we learned from the initial teardowns of the dishy was that it has= a ntpd supported GPS chip, which means the dishy could be supplying really= accurate time via ntp or pptp to routers downstream of it. It would be coo= l if it did that, but so far as I know, still doesn=C2=B4t. A precisely syn= ced router could more smartly buffer and drop packets.=C2=A0

How likely is it for this reconfiguration interval to = remain a thing? I=C2=B4d hate to burn the time coding up the concept (and s= laving a router to another time sync source - I still have a couple of the = 1 pps gps dongles we built as part of the thumbgps project lying around, mo= re than a few people here have gps on their raspi hats) only to see it vani= sh, as much as I would like it to vanish.=C2=A0
=C2=A0


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