Mode Change Protocols for Priority-Driven Preemptive Scheduling

Authors:
L. Sha;R. Rajkumar;J. Lehoczky;K. Ramamritham
Affiliations:
-;-;-;-
Venue:
Mode Change Protocols for Priority-Driven Preemptive Scheduling
Year:
1989

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Abstract

IN MANY REAL-TIME APPLICATIONS, THE SET OF TASKS IN THE SYSTEM AS WELL AS THE CHARACTERISTICS OF THE TASKS CHANGE DURING SYSTEM EXECUTION. SPECI- FICALLY, THE SYSTEM MOVES FROM ONE MODE OF EXECUTION TO ANOTHER AS ITS MISSION PROGRESSES. A MODE CHANGE IS CHARACTERIZED BY THE DELETION OF SOME TASKS, ADDITION OF NEW TASKS, OR CHANGES IN THE PARAMETERS OF CERTAIN TASKS, E.G., INCREASING THE SAMPLING RATE TO OBTAIN A MORE ACCURATE RESULT. THIS PAPER DISCUSSES HOW MODE CHANGES CAN BE ACCOMMODATED WITHIN A GIVEN FRAMEWORK OF PRIORITY DRIVEN REAL-TIME SCHEDULING.