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SubjectRe: UP Regression (was) Re: Scaling noise


Cliff White wrote:

>[snip]
>.
>
>>I don't think anyone advocates sacrificing UP performance for 32 ways, but
>>as he says it can happen .1% at a time.
>>
>>But it looks like 2.6 will scale well to 16 way and higher. I wonder if
>>there are many regressions from 2.4 or 2.2 on small systems.
>>
>>
>>
>On the Scalable Test Platform, running osdl-aim-7, for the
>UP case, 2.4 is a bit better than 2.6, this is consistent across
>many runs. For SMP, 2.6 is better, but the delta is rather
>small, until we get to 8 CPUS. We have a lot of un-parsed data from other
>tests - might be some trends there also.
>See http://developer.osdl.org/cliffw/reaim/index.html
>2.4 kernels are at the bottom of the page.
>

Forgive my ignorance of your benchmarks, but this might very well
be HZ == 1000?


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