The two most impotrtant schedulers


RM (Rate Monotonic)
The higher the rate, the higher the priority.
When a task is released, it preempts any higher-period task

EDF (Earliest Deadline First)
"Dynamic priority" (not fixed for each process)
When a task is released, it preempts if its deadline is nearer

RM is simpler, EDF is better
EDF guarantees schedulability up to U = 1