A Dynamic Real-Time Scheduling Algorithm for Aperiodic Tasks Based on Self-Regulation
Chen Guang Xu · 2006
A category of performance-critical real-time systems executing in open and unpredictable environment have been rapidly growing.This paper proposes a DRSSR(Dynamic Real-time Scheduling based on Self-Regulation)model to deal with such an unpredictable environment.The DRSSR integrates admission control with QoS degradation,which is able to dynamically determine the QoS of incoming tasks,meet their timeliness requirements,eliminate the disturb- ance and improve the system throughput.Then,this paper analyses the DRSSR's transient and steady state perform- ance.Finally,a set of experiments,based on the real-time operating system CRTOS-Ⅱ,demonstrate that the DRSSR performs well under dynamical real-time environment and response quickly to the unpredictable variations.