Combined Scheduling of Time-Triggered and Priority-Based Task Sets in Ravenscar

Time-triggered and priority-based are the two major approaches for scheduling real-time systems. Both have their own advantages and drawbacks and none is superior in the general case. While time-triggered schedules excel at determinism and jitter control, they are hard to design and lack flexibility. Priority-based scheduling, on the other hand, keeps the logical and timing aspects of real-time applications conveniently separated from each other, at the cost of indeterminism and larger input and output jitter for all but the highest-priority tasks.