Re: 2.5.36-mm1 dbench 512 profiles

From: Martin J. Bligh (
Date: Fri Sep 20 2002 - 18:22:20 EST

>>> AFAICT, with one bottleneck out of the way, a new one merely arises to
>>> take its place. Ugly. OTOH the qualitative difference is striking. The
>>> interactive responsiveness of the machine, even when entirely unloaded,
>>> is drastically improved, along with such nice things as init scripts
>>> and kernel compiles also markedly faster. I suspect this is just the
>>> wrong benchmark to show throughput benefits with.
> On Fri, Sep 20, 2002 at 02:30:23PM -0700, Martin J. Bligh wrote:
>> Hmmm ... I think you need the NUMA aware scheduler ;-)
>> On the plus side, that does look like RCU pretty much obliterated the dcache
>> problems ....
> This sounds like a likely solution to the expense of load_balance().
> Do you have a patch for it floating around?

I have a really old hacky one from Mike Kravetz, or Michael Hohnbaum
is working on something new, but I don't think it's ready yet ....
I think Mike's will need some rework. Will send it to you ...


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