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Date: Fri, 24 Jan 2003 18:26:48 -0800
From: Larry McVoy <lm@bitmover.com>
To: Jason Papadopoulos <jasonp@boo.net>
Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org
Subject: Re: your mail
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> For the record, I finally got to try my own page coloring patch on a 1GHz
> Athlon Thunderbird system with 256kB L2 cache. With the present patch, my
> own number crunching benchmarks and a kernel compile don't show any benefit 
> at all, and lmbench is completely unchanged except for the mmap latency, 
> which is slightly worse. Hardly a compelling case for PCs!

If it works correctly then the variability in lat_ctx should go away.
Try this

	for p in 2 4 8 12 16 24 32 64
	do	for size in 0 2 4 8 16
		do	for i in 1 2 3 4 5 6 7 8 9 0
			do	lat_ctx -s$size $p
			done
		done
	done

on both the with and without kernel.  The page coloring should make the 
numbers rock steady, without it, they will bounce a lot.
-- 
---
Larry McVoy            	 lm at bitmover.com           http://www.bitmover.com/lm 
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