Discussion
A designer halves the period of the highest priority task in a schedulable set. The set is now
Answer: D
Correct answer: possibly unschedulable, the interference on everything below having doubled
Halving the period doubles both that task’s utilisation and the number of times it preempts everything below it in the analysis window. The task itself is unaffected, being highest priority, but every other task now suffers twice the interference from it, and the set must be reanalysed.
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