Improving Responsiveness of Hard Real-Time Embedded Systems
Hard real-time systems are found in many critical em bedded applications, for example aeroplane flight con trol, industrial production line control, and so on. The safe scheduling of tasks in these hard real-time systems is crucial to their correct operation, but the hard con straints of this type of scheduling reduce the responsive ness of the systems. In this paper we show the appli cation of runtime analysis in informing the design of hard real-time embedded systems by allowing sched uled tasks to be dynamically re-ordered to improve the average responsiveness, while still meeting the hard constraints imposed by the system. The technique is semi-automated, and uses the reduce computer algebra system to precalculate a symbolic form of the runtime of scheduled tasks. The symbolic form is used to modify the source code of the scheduler.
Hugh Anderson Siau-Cheng Khoo
Center for Creative Technologies Wellington Institute of Technology Department of Computer Science National University of Singapore
国际会议
天津
英文
13-20
2009-07-29（万方平台首次上网日期，不代表论文的发表时间）