From: Jonathan Morton <chromatix99@gmail.com>
To: "David P. Reed" <dpreed@deepplum.com>
Cc: Jonathan Foulkes <jf@jonathanfoulkes.com>,
Rich Brown <richb.hanover@gmail.com>,
cerowrt-devel <cerowrt-devel@lists.bufferbloat.net>,
bloat <bloat@lists.bufferbloat.net>
Subject: Re: [Cerowrt-devel] [Bloat] (no subject)
Date: Sun, 19 May 2019 01:57:22 +0300 [thread overview]
Message-ID: <DDAB928C-31F7-4A4A-9463-BDB182E8E160@gmail.com> (raw)
In-Reply-To: <1558219006.29034759@apps.rackspace.com>
> On 19 May, 2019, at 1:36 am, David P. Reed <dpreed@deepplum.com> wrote:
>
> Pardon, but cwnd should NEVER be larger than the number of forwarding hops between source and destination.
> Kleinrock and students recently proved that the optimum cwnd for both throughput and minimized latency is achieved when there is one packet or less in each outbound queue from source to destination (including cross traffic - meaning other flows sharing the same outbound queue.
This argument holds only if time-of-flight *between* nodes is negligible. Trivially, a geosynchronous satellite hop adds only two nodes but approximately half a second to the one-way path delay, with potentially thousands of packets existing only as radio waves in the distance between, not in a queue.
- Jonathan Morton
next prev parent reply other threads:[~2019-05-18 22:57 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-05-14 12:16 [Cerowrt-devel] fq_codel is SEVEN years old today Rich Brown
2019-05-14 17:57 ` Valdis Klētnieks
2019-05-14 18:38 ` David P. Reed
2019-05-14 22:05 ` David P. Reed
2019-05-14 22:35 ` [Cerowrt-devel] [Bloat] " Toke Høiland-Jørgensen
2019-05-14 23:34 ` David P. Reed
2019-05-15 7:31 ` [Cerowrt-devel] (no subject) Sebastian Moeller
2019-05-15 7:58 ` [Cerowrt-devel] [Bloat] " Dave Taht
2019-05-15 8:30 ` Sebastian Moeller
2019-05-16 22:01 ` Jonathan Foulkes
2019-05-18 22:36 ` David P. Reed
2019-05-18 22:57 ` Jonathan Morton [this message]
2019-05-18 23:06 ` Jonathan Morton
2019-05-19 2:06 ` David P. Reed
2019-05-16 16:40 ` Jonathan Foulkes
2019-05-16 22:12 ` Sebastian Moeller
2019-05-18 11:36 ` [Cerowrt-devel] [Bloat] fq_codel is SEVEN years old today Dave Taht
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