Jitter Aware Scheduler For Real-Time Control Applications

DUVAL, M.; CAYSSIALS R.; ALIMENTI O.; FERRO E.; OROZCO, J.

San José

Congreso; CLEI 2007; 2007

CLEI

Digital control uses real-time systems to implement its control strategies. However, an inadequate scheduling strategy, even schedulable from a real-time point of view, may produce undesirable control consequences in the application. In this paper, we propose a scheduling mechanism based on a Dual-Priority scheme ([7]) to reduce the adverse control effects that jitter produces in an automatic digital control system. On the other hand, with the use of Dual-Priority scheme, the response time of non-control tasks in real-time systems is improved. The mechanism proposed promotes the control tasks of the system according to its current level of jitter sensitiveness. We show that with the mechanism proposed the performance of both control and non-control task is improved.