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From: John Baldwin <jhb@freebsd.org>
To: freebsd-hackers@freebsd.org
Subject: Re: Multiple page size support on FreeBSD?
Date: Wed, 10 Apr 2013 10:06:13 -0400
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Cc: Wojciech Puchar <wojtek@wojtek.tensor.gdynia.pl>,
 Benjamin Kaduk <kaduk@mit.edu>, Sebastian Feld <sebastian.n.feld@gmail.com>
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On Monday, April 08, 2013 6:39:31 am Wojciech Puchar wrote:
> > Superpage promotion happens automatically when consecutive data are accessed 
> > according to the proper heuristic.
> 
> and in practice - unless there are only few processes, never really works.
> 
> this is a result of my own tests.

How do your tests work?  Do you examine PTEs directly to check for superpages
or are you relying on the vm.pmap.pde sysctls?

-- 
John Baldwin