RE: Update: Industry db benchmark result

From: Chen, Kenneth W
Date: Wed Jun 22 2005 - 19:17:23 EST

Andi Kleen wrote on Wednesday, June 22, 2005 4:44 PM
> "Chen, Kenneth W" <kenneth.w.chen@xxxxxxxxx> writes:
> >
> > It's been hovering around -13%.
> Do you have an educated guess where the 13% loss is comming from?

Process scheduler is the prime suspect. Earlier scheduler experiments
on top of 2.6.11 showed that it was about 10% regression. Similar
experiments repeated on top of 2.6.12-rc4 indicated about a much
smaller 4%. Other area are O_DIRECT (2%), and possibly scsi.

- Ken

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