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> Errr, I'm quite sure you're mad. Real Time operating systems are *all* > about being predictable. If you think they're not predictable, that QNX > installation at your local nuclear power plant, or WindRiver VxWorks > in that cruise missile are in deep s***.

Not in the way you think... Soft RT will try to execute the task in the given time "else" it will finish the execution later. Hard RT will try to execute the task in the given time "else" it will simply refuse to make it run.

Of course if you have a small (10 ms average execution time) task to execute in a quite long time (1 s), you don't need such predicatable features : with a simple PMT system (and only a few tasks running), your small task will ever be able to run in the given time.

But I really dont call this a fully predicatable system :) So perhaps I'm not mad... after all...

 is a RISC OS Userdfeugey on 02/08/03 10:04AM
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