Re: [BENCHMARK] fork_load module tested for contest

[Cliff White <cliffw@osdl.org>]

> 
> 
> 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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