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Characterization of Scheduling Policies
nThe selection function:
determines which process in the ready
queue is selected next for execution
nThe decision mode: specifies
the instants in time at which the
selection function is exercised
uNonpreemptive
FOnce
a process is in the running state, it will continue until it terminates or blocks
itself for I/O
uPreemptive
FCurrently
running process may be interrupted and moved to the Ready state by the OS
FAllows
for better service since any one process cannot monopolize the processor for very
long