“Towards Self-Adaptive Scheduling in Time- and Space-Partitioned Systems”

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João Pedro Craveiro, Joaquim Rosa, José Rufino

in 32nd IEEE Real-Time Systems Symposium (RTSS 2011) — Work-in-Progress session, Vienna, Austria, Dec. 2011.

Abstract: Time- and space-partitioned systems (TSP) are a current trend in safety-critical systems, most notably in the aerospace domain; applications of different criticalities and origins coexist in an integrated platform, while being logically separated in partitions. To schedule application activities, TSP systems employ a hierarchical scheduling scheme. Flexible (self-)adaptation to abnormal events empowers the survivability of unmanned space vehicles, by preventing these events from becoming severe faults and/or permanent failures. In this paper, we propose adding self-adaptability mechanisms to the TSP scheduling scheme to cope with timing faults. Our approach consists of having a set of feasible and specially crafted partition scheduling tables, among which the system shall switch upon detecting temporal faults within a partition. We also present the preliminary experimental evaluation of the proposed mechanisms.

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Project(s): Project:AIR-II, Project:KARYON, Project:PROPHECY

Research line(s): Timeliness and Adaptation in Dependable Systems (TADS)

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