From task scheduling in single processor environments to message scheduling in a PROFIBUS fieldbus network

Tovar, Eduardo; Vasques, Francisco

http://hdl.handle.net/10400.22/3564

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Authors

Tovar, Eduardo

Vasques, Francisco

Abstract(s)

In this paper we survey the most relevant results for the prioritybased schedulability analysis of real-time tasks, both for the fixed and dynamic priority assignment schemes. We give emphasis to the worst-case response time analysis in non-preemptive contexts, which is fundamental for the communication schedulability analysis. We define an architecture to support priority-based scheduling of messages at the application process level of a specific fieldbus communication network, the PROFIBUS. The proposed architecture improves the worst-case messages’ response time, overcoming the limitation of the first-come-first-served (FCFS) PROFIBUS queue implementations.