Energy-aware real-time task synchronization in multi-core embedded systems

Abstract

The problem of energy-aware real-time task synchronization in multi-core systems is complicated by difficulties resulting from the trade-off between run-time blocking management and energy conservation. This paper proposes the Triple Speed concept to render energy-aware to existing multicore real-time synchronization protocols and better manage energy consumption from run-time blocking effects. Algorithms are presented to assign required core frequencies to minimize energy consumption and meet timing constraints by accounting for schedulability tests. A series of extensive simulations are performed to evaluate the proposed methodology.

Multiprocessor Real-Time Locking Protocols: A Systematic Review

“…One important resource in multiprocessor real-time systems that we have excluded from consideration herein is energy. Unsurprisingly, energy management policies, in particular schemes that change processor speeds, can have a significant impact on synchronization [69,86,99,196,211]. Another architectural aspect that can interact negatively with multiprocessor real-time locking protocols is simultaneous multithreading (SMT) [133].…”

Energy-aware Fixed-Priority Multi-core Scheduling for Real-time Systems

“…On the other hand, there are also many works on energy-aware scheduling for real-time system [10], [23], [24], [25]. It is proved that DVS can achieve significant energy savings.…”