[LITMUS^RT] running a task as its execution time

Björn Brandenburg bbb at mpi-sws.org
Thu May 31 09:46:30 CEST 2012


On May 31, 2012, at 7:34 AM, Jonathan Herman wrote:

> We encountered this same issue with the mixed-criticality
> and EDF-HSB schedulers. Our poor implementation was to remove the '&&
> !preempt' before job_completion in the _schedule method, and
> compensate by adding a check for is_queued(task) in the _requeue
> method so that job_completion could be called after a preemption
> without causing a BUG.
> 
>> It seems to me the right thing to do is to not add unlinked tasks to the ready queue if they have no budget remaining. Then it is safe to process the job completion even if it coincides with a preemption.
> 
> This is a better solution.


I have pushed a proposed fix to prop/budget-bug-fix. It seems to fix the issue for me. Everyone, please test & review.

Giovani, can you please confirm that this fixes the bug?

Thanks,
Björn





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