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Minimizing Task Preemptions and Migrations in Multiprocessor Optimal Real-Time Schedules

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3 Author(s)
Megel, T. ; Embedded Real Time Syst. Lab., CEA, Gif-sur-Yvette, France ; Sirdey, R. ; David, V.

We present a new approach to decrease task preemptions and migrations in optimal global real-time schedules on symmetric multiprocessors. Contrary to classical approaches, our method proceeds in two steps, one off-line to place jobs on intervals and one on-line to schedule them dynamically inside each interval. We propose a new linear programming formulation and a local scheduler which exhibits low complexity and produces few task preemptions and migrations. We compare our approach with other optimal scheduling algorithms, using the implicit-deadline periodic task model. Simulation results illustrate the competitiveness of our approach with respect to task preemptions and migrations.

Published in:

Real-Time Systems Symposium (RTSS), 2010 IEEE 31st

Date of Conference:

Nov. 30 2010-Dec. 3 2010