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Date: Thu, 14 Dec 2006 14:16:29 +0300
From: Anton Yuzhaninov <citrin@citrin.ru>
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To: Andre Oppermann <andre@freebsd.org>
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Cc: freebsd-net@freebsd.org
Subject: Re: Automatic TCP send and receive socket buffer sizing
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Wednesday, December 13, 2006, 1:30:26 AM, Andre Oppermann wrote:

AO> The patch is available here (it may apply with some fuzz):
AO>   http://people.freebsd.org/~andre/tcp_auto_buf-20061212.diff
AO> Any tests and test reports are very welcome.

Please answer on question from Phil Rosenthal:

PR> 1) I've seen in production that some sockets get large very
PR> quickly during periods of high latency (eg: when sending to a user
PR> downloading from a cablemodem and their headend gets temporarily
PR> saturated and has large buffers, which raises the RTT under
PR> saturation, which increases the bandwidth delay product), but then
PR> as there isn't any code to shrink the buffers. This would probably
PR> need to be in the timers to notice the case of the sender
PR> temporarily stopping sending - eg in a keepalive http socket (a
PR> separate, but related issue).

--=20
 WBR, Anton Yuzhaninov

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