关键词: 实时系统, 多核系统, 动态电压频率调节, 并行任务, 弱硬实时

Abstract:

In the realtime embedded areas, especially in wireless mobile and portable computing, energy consumption is now of primary consideration, which is the primary reason that the applications of multicore processors are still in full swing for the embedded field. As to realtime applications for the current multicore systems, a realtime scheduling technology based on Dynamic Voltage Frequency Scaling (DVFS) is studied less, and there are also many scientific and technical issues to be resolved. This paper introduces dynamic voltage frequency scaling in the multicore systems, analyses and discusses the research evolvement of realtime scheduling in the current multicore systems, then goes deep into DVFSbased realtime energyefficient scheduling in the multicore systems mainly for the aspects of homogeneous multicore, heterogeneous multicore, parallel task model and weakly hard realtime model. Combining multicore systems, DVFSbased energy management and realtime scheduling to explore the realtime energyefficient scheduling in the multicore systems, laying a theoretical and technical basis, the paper is of great theoretical significance and practical application importance.

Key words: time systems;multicore systems;dynamic voltage frequency scaling;parallel task;weakly hard realtime