DocumentCode :
2522942
Title :
Research of Optimal Task Scheduling for Distributed Real-time Embedded Systems
Author :
Bin Zeng ; Wei, Jun ; Liu, Haiqing
Author_Institution :
Dept. of Manage., Naval Univ. of Eng., Wuhan
fYear :
2008
fDate :
29-31 July 2008
Firstpage :
77
Lastpage :
84
Abstract :
Distributed real-time embedded (DRE) systems are becoming increasingly common and important as the underlying technology for distributed computing and networking systems continues to develop. Efficient task scheduling is essential for achieving high performance in the application of embedded systems. However, because of its NP-hard nature, there are mainly heuristic algorithms in this area still needed to be improved. In this paper, a modified dynamic critical path algorithm is presented to find the earliest possible start time and the latest possible finish time of a task using the distributed nodes network structure. An algorithm called the combined dynamic BLevel (CBL) has been presented to select the node-task mapping priorities based on the dynamic critical path. Using a novel DRE network model and a communication scheduling algorithm, tasks and associated information events are scheduled simultaneously with the transfer time onto a nodepsilas communication link. According to the simulation results, the proposed solution outperforms existing mechanisms in terms of schedule length for communication intensive tasks.
Keywords :
computational complexity; embedded systems; scheduling; NP-hard problems; combined dynamic BLevel; distributed real-time embedded systems; dynamic critical path algorithm; heuristic algorithms; node-task mapping priorities; optimal task scheduling; Dynamic scheduling; Embedded software; Embedded system; Heuristic algorithms; Job shop scheduling; Multiprocessing systems; Optimal scheduling; Processor scheduling; Real time systems; Scheduling algorithm; Distributed real-time embedded systems; Dynamic critical path; list scheduling; scheduling length;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Embedded Software and Systems, 2008. ICESS '08. International Conference on
Conference_Location :
Sichuan
Print_ISBN :
978-0-7695-3287-5
Type :
conf
DOI :
10.1109/ICESS.2008.29
Filename :
4595541
Link To Document :
بازگشت