WCET-aware scheduling optimizations for multi-core real-time systems
Embedded Computer Systems: Architectures, Modeling, and Simulation(2014)
摘要
In real-time systems, the WCET (worst-case execution time) of tasks is of utmost importance. For multi-cores, the WCET has been shown to be hard to determine due to task interactions on shared memory and shared buses. This problem is usually addressed by spatial or temporal partitioning of the resources, but both lead to lower utilization if the partitioning is not done optimally. We examine two approaches for optimizing resource usage in a temporally partitioned multi-core system and show that these techniques can reduce the WCET by more than 30% on average, leading to better schedulability and higher system utilization.
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关键词
multiprocessing systems,optimisation,real-time systems,WCET-aware scheduling optimization,multicore real-time systems,shared buses,shared memory,spatial partitioning,task interaction,temporal partitioning,worst-case execution time
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