可重构系统中的实时任务在线调度与放置算法

有效的任务调度与放置是发挥可重构计算性能优势的重要因素.针对实时任务在二维可重构器件上的在线调度问题,定义了调度算法完全识别的概念,即算法不会拒绝能够成功调度的任务.提出了新的实时在线调度与放置算法,充分利用了任务的时间信息,实现了完全识别的调度.实验表明,与已有的算法相比,新算法显著地改善了调度效果,而运行开销没有明显增加.

On-Line Scheduling and Placement of Real-Time Tasks for Reconfigurable Computing System

Efficient task scheduling and placement are very important for obtaining high performance in reconfigurable computing system.This paper focuses on the on-line scheduling of real-time tasks on a 2-dimensional reconfigurable device,and introduces the notion of recognition-complete for scheduling algorithms,that is the algorithm do not reject a task when a feasible schedule for this task exists.A new on-line scheduling and placement algorithm is proposed.By utilizing the temporal information of real-time tasks thoroughly,the proposed algorithm achieves recognition-complete.The simulation results show that the proposed algorithm gains a prominent improvement in scheduling performance over previous algorithms,while the run-time efficiency is preserved.