Global Adaptation Controlled by an Interactive Consistency Protocol

• Main Authors: Alina Lenz, Roman Obermaisser
• Format: Article
• Language: English
• Published: MDPI AG 2017-05-01
• Series: Journal of Low Power Electronics and Applications
• Subjects: real-time; low power; mixed-criticality
• Online Access: http://www.mdpi.com/2079-9268/7/2/13

Static schedules for systems can lead to an inefficient usage of the resources, because the system’s behavior cannot be adapted at runtime. To improve the runtime system performance in current time-triggered Multi-Processor System on Chip (MPSoC), a dynamic reaction to events is performed locally on the cores. The effects of this optimization can be increased by coordinating the changes globally. To perform such global changes, a consistent view on the system state is needed, on which to base the adaptation decisions. This paper proposes such an interactive consistency protocol with low impact on the system w.r.t. latency and overhead. We show that an energy optimizing adaptation controlled by the protocol can enable a system to save up to 43% compared to a system without adaptation.