netdev - Re: tcp bw in 2.6

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Message-ID: <20071002223644.GA14331@bitmover.com>
Date:	Tue, 2 Oct 2007 15:36:44 -0700
From:	lm@...mover.com (Larry McVoy)
To:	David Miller <davem@...emloft.net>
Cc:	rick.jones2@...com, lm@...mover.com, torvalds@...ux-foundation.org,
	herbert@...dor.apana.org.au, wscott@...mover.com,
	netdev@...r.kernel.org
Subject: Re: tcp bw in 2.6

On Tue, Oct 02, 2007 at 03:32:16PM -0700, David Miller wrote:
> I'm starting to have a theory about what the bad case might
> be.
> 
> A strong sender going to an even stronger receiver which can
> pull out packets into the process as fast as they arrive.
> This might be part of what keeps the receive window from
> growing.

I can back you up on that.  When I straced the receiving side that goes
slowly, all the reads were short, like 1-2K.  The way that works the 
reads were a lot larger as I recall.
-- 
---
Larry McVoy                lm at bitmover.com           http://www.bitkeeper.com
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