Hi,

I don't have the answer, but just to feed my curiosity, do you know what 
would happen if you run the benchmarks much longer ? I can imagine that 
it would either stabilize on some value, or, it might start again from a 
large value at the beginning..

Tomas

Cornelius Köpp wrote:
> Hello,
> I run the latency test from testsuite on several hard and software 
> configurations. Running on Xenomai 2.4.2, Linux 2.6.24 the results shows a 
> "strange" behavior: In Kernel mode (-t1) the latencys constantly linear 
> decrease. See attached plot 'drifting_latencys_in_kernelmode.png' of latency 
> test running 48h on Pentium3 700. This effect could be reproduced, even on 
> other hardware (Pentium-M 1400). The usermode (-t0) did not show a drifting, 
> but is influenced by a test ran in kernelmode before.
>
> I talked with Sebastian Smolorz about this and he builds his own independent 
> kernel-config to check. He got the same drifting-effect with Xenomai 2.4.2 
> and Xenomai 2.4.3 running latency over several hours. His kernel-config ist 
> attached as 'config-2.6.24-xenomai-2.4.3__ssm'.
>
> Our kernel-configs are both based on a config used with Xenomai 2.3.4 and 
> Linux 2.6.20.15 without any drifting effects.
>
> Bad luck with the config?
>
>
> Thanks in advance,
>
> Cornelius Köpp
>   
>
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