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Subject: Re: Performance differences for recent kernels running forky test.
From: Alan Cox <alan@lxorguk.ukuu.org.uk>
To: Steven Cole <elenstev@mesatop.com>
Cc: Linux Kernel <linux-kernel@vger.kernel.org>
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Date: 15 Aug 2002 02:17:41 +0100
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On Wed, 2002-08-14 at 20:17, Steven Cole wrote:
> I ran the following lots_of_forks.sh script for several kernels.
> 
> http://people.nl.linux.org/~phillips/patches/lots_of_forks.sh
> 
> using time -v sh lots_of_forks.sh
> 
> The results for 2.4.20-pre2 and 2.4.20-pre2-ac1 are very different.

I'd expect that to be the case. Rmap is a huge win for many things but
its not a good win on fork times. The question is whether fork bombs
dominate your working load and what the tradeoffs are between saner VM
behaviour and less accounting overhead.

Its not clear what the answer is.

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