Re: [Lse-tech] multi-queue scheduler update

Mike Kravetz (mkravetz@sequent.com)
Tue, 23 Jan 2001 09:08:49 -0800

On Tue, Jan 23, 2001 at 11:49:27AM -0500, Jun Nakajima wrote:
> I tried to run SDET (Software Development Environment Throughput), which
> basically is a system level, throughput oriented benchmark, on the 2.4.0
> kernel and 2.4.0 kernel with this patch.

Thanks for running this. I too remember SDET, but I won't claim
to be old. :)

We were doing some more analysis on the multi-queue scheduler and
noticed that performance has regressed since posting preliminary
numbers with the 2.4.0-test10 kernel. After comparing the code,
it looks like I have over-engineered for the worst case of lock
contention. This was done at the expense of the normal case.
I'm currently working on this situation and expect to have a new
patch out in the not too distant future.

I expect the numbers will get better.

-- 
Mike Kravetz                                 mkravetz@sequent.com
IBM Linux Technology Center
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