Re: [PATCH] Radix-tree pagecache for 2.5

From: chris@scary.beasts.org
Date: Sun Feb 03 2002 - 09:31:08 EST


On Sat, 2 Feb 2002 rwhron@earthlink.net wrote:

> Num Seq Write CPU Rand Write CPU
> Thr Rate (CPU%) Eff Rate (CPU%) Eff
> --- ------------------- -----------------
> 2.4.17 1 11.08 50.5% 21.94 0.69 1.6% 44.10
> 2.4.17rat 1 7.77 32.8% 23.69 0.53 1.1% 48.44

This is a worrying trend your benching has exposed - all the streaming
write tests have taken a performance hit. Above is tiobench, and bonnie
showed the same trend too.

Chris

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