priority controlled multitasking and UNIX OSs

Peter Foelsche
Peter Foelsche
Joined: 10 Sep 05
Posts: 8
Credit: 61845
RAC: 0

I did some experiment on

Message 20362 in response to message 20361

I did some experiment on LINUX and priorities seem to have some effect.
A process with lowest priority seems to get less than 5% of the CPU.
This is certainly more of an effect than I remember from my last experiment
in this regard.
So it seems that I was wrong at least in point of view of LINUX.

Peter Foelsche
Peter Foelsche
Joined: 10 Sep 05
Posts: 8
Credit: 61845
RAC: 0

I did some further tests on

Message 20363 in response to message 20362

I did some further tests on LINUX.
Running 3 processes with lowest
priority means that only 85% of the CPU is available to forground processes
-- so every low priority process will get max. 5% of the CPU.
On NT 100% would be available for forground processes.
I certainly prefer the NT way.
This of course applies only to priority class idle.
Processes in the normal priority class but with different
priorities still share the CPU.

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