Re: [BENCHMARK] fork_load module tested for contest

Cliff White (cliffw@osdl.org)
Wed, 25 Sep 2002 15:14:26 -0700


>
>
> I've been trialling a new load module for the contest benchmark
> (http://contest.kolivas.net) which simply forks a process that does nothing,
> waits for it to die, then repeats. Here are the results I have obtained so far:
>
> noload:
> Kernel Time CPU Ratio
> 2.4.19 72.90 99% 1.00
> 2.4.19-ck7 71.55 100% 0.98
> 2.5.38 73.86 99% 1.01
> 2.5.38-mm2 73.93 99% 1.01
>
> fork_load:
> Kernel Time CPU Ratio
> 2.4.19 100.05 69% 1.37
> 2.4.19-ck7 74.65 95% 1.02
> 2.5.38 77.35 95% 1.06
> 2.5.38-mm2 76.99 95% 1.06
>
> ck7 uses O1, preempt, low latency
> Preempt=N for all other kernels
>
> Clearly you can see the 2.5 kernels have a substantial lead over the current
> stable kernel.
>
> This load module is not part of the contest package yet. I could certainly
> change it to fork n processes but I'm not really sure just how many n should be.

I think for OSDL/STP, it would be nice if n == number of CPU's, so maybe make
'n' an arg?
When you say the process 'does nothing', what do you mean? It forks, then the
child does exit() ?
cliffw
>
> Comments?
>
> Con Kolivas
>
> P.S. Results have negligible differences on repeat testing.
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