linux-kernel - Re: [PATCH] tcp_cubic: use 32 bit math

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Message-Id: <20070307.185539.48527371.davem@davemloft.net>
Date:	Wed, 07 Mar 2007 18:55:39 -0800 (PST)
From:	David Miller <davem@...emloft.net>
To:	shemminger@...ux-foundation.org
Cc:	w@....eu, rkuhn@....physik.tu-muenchen.de, andi@...stfloor.org,
	dada1@...mosbay.com, jengelh@...ux01.gwdg.de,
	linux-kernel@...r.kernel.org, netdev@...r.kernel.org
Subject: Re: [PATCH] tcp_cubic: use 32 bit math

From: Stephen Hemminger <shemminger@...ux-foundation.org>
Date: Wed, 7 Mar 2007 17:07:31 -0800

> The basic calculation has to be done in 32 bits to avoid
> doing 64 bit divide by 3. The value x is only 22bits max
> so only need full 64 bits only for x^2.
> 
> Signed-off-by: Stephen Hemminger <shemminger@...ux-foundation.org>

Applied, thanks Stephen.

What about Willy Tarreau's supposedly even faster variant?
Or does this incorporate that set of improvements?
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