linux-kernel - Re: Raise initial congestion window size / speedup slow start?

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Message-ID: <20100714230100.GL6682@nuttenaction>
Date:	Thu, 15 Jul 2010 01:01:00 +0200
From:	Hagen Paul Pfeifer <hagen@...u.net>
To:	Ed W <lists@...dgooses.com>
Cc:	David Miller <davem@...emloft.net>, rick.jones2@...com,
	davidsen@....com, linux-kernel@...r.kernel.org,
	netdev@...r.kernel.org
Subject: Re: Raise initial congestion window size / speedup slow start?

* Ed W | 2010-07-14 23:52:02 [+0100]:

>Out of curiousity, why has it taken so long for active feedback to
>appear?  If every router simply added a hint to the packet as to the
>max bandwidth it can offer then we would appear to be able to make
>massively better decisions on window sizes.  Furthermore routers have
>the ability to put backpressure on classes of traffic as appropriate.
>I guess the speed at which ECN has been adopted answers the question
>of why nothing more exotic has appeared?

It is quite late here so I will quickly write two sentence about ECN: one
month ago Lars Eggers posted a link at the tcpm maillinglist where google (not
really sure if it was google) analysed the employment of ECN - the usage was
really low. Search the PDF, it is quite interesting one.

Hagen


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