A capacity sharing and stealing strategy for open real-time systems

A capacity sharing and stealing strategy for open real-time systems

This paper focuses on the scheduling of tasks with hard and soft real-time constraints in open and dynamic real-time systems. It starts by presenting a capacity sharing and stealing (CSS) strategy that supports the coexistence of guaranteed and non-guaranteed bandwidth servers to efficiently handle soft tasks’ overloads by making additional capacity available from two sources: (i) reclaiming un...

A Fast Slack Stealing method for embedded Real-Time Systems

In this paper we present a low-cost Slack-Stealing method, named Fast Slack, to be employed in a Fixed Priority scheduling mechanism. The slack obtained is intended to improve the execution of non-critical tasks without jeopardizing the schedulability of the critical ones. The method is compared with the most important one in the realtime theory. We show that the complexity of this method is su...

A time-sharing architecture for complex real-time systems

In this paper we show how a real-time time-sharing RtTS architecture can be very useful in resolving many of the formidable problems generally posed by complex real-time systems. In particular, we address dynamic multi-job systems, running on shared-memory multi-processor platforms. Each job is multi-tasked, with task characteristics assumed to be complex, e.g. some critical, some dependent , s...

Runtime monitoring for open real- time systems

A New Adaptive Load-Shedding and Restoration Strategy for Autonomous Operation of Microgrids: A Real-Time Study

Islanding operation is one of the main features of a MicroGrid (MG), which is realized regarding the presence of distributed energy resources (DERs). However, in order to deal with the control challenges, which an MG faces during island operation, particularly when the transition is associated with certain excessive load, an efficient control strategy is required. This paper introduces a Centra...