A Multithreaded Java Microcontroller for Thread-Oriented Real-Time Event Handling

Authors:
U. Brinkschulte;C. Krakowski;J. Kreuzinger;Th. Ungerer
Affiliations:
-;-;-;-
Venue:
PACT '99 Proceedings of the 1999 International Conference on Parallel Architectures and Compilation Techniques
Year:
1999

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Abstract

We propose a multithreaded Java microcontroller--called Komodo microcontroller--with a new hardware event handling mechanism that allows handling of simultaneous overlapping events with hard real-time requirements. Real-time Java threads are used as interrupt service threads (ISTs) instead of interrupt service routines (ISRs). Our proposed Komodo microcontroller supports multiple ISTs with zero-cycle context switching overhead. We evaluate the basic architectural attributes using real-time event parameters of an autonomous guided vehicle. When calculating the maximum vehicle speed without violating the real-time constraints, ISTs dominate ISRs by a speed increase of 28%.