Strategies for real-time system specification
Strategies for real-time system specification
“Post-game analysis”: a heuristic resource management framework for concurrent systems
“Post-game analysis”: a heuristic resource management framework for concurrent systems
An operating environment for control systems
OUG-13 Proceedings of the 13th Occam user group technical meeting on Real-time systems with transputers
Towards a distributed implementation of occam
OUG-13 Proceedings of the 13th Occam user group technical meeting on Real-time systems with transputers
Post-game analysis on transputers
Proceedings of the world transputer user group (WOTUG) conference on Transputing '91
Design analysis of a priority driven scheduler for transputers
Proceedings of the world transputer user group (WOTUG) conference on Transputing '91
The Twente approach to system level embedded controller design
WoTUG'93/Japan Proceedings of the 5th transputer/occam international conference on Transputer/Occam
Scheduling Algorithms for Multiprogramming in a Hard-Real-Time Environment
Journal of the ACM (JACM)
Communicating sequential processes
Communications of the ACM
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Inter-process communication and scheduling are notorious problem areas in the design of real-time systems. Using CASE tools, the system design phase will in general result in a system description in the form of parallel processes. Manual allocation of these processes to processors may result in error prone and/or slow communication code. Scheduling of the processes, necessary to meet timing constraints, is also a tedious task that takes many iterations. The described design tools result in code that is comparable in quality and performance with expert manual realization. Many network layers have been implemented to relieve the user from the low-level programming of communication software. However, the increase in user-friendliness is usually paid with performance degradation. The proposed approach combines user-friendliness with high performance by generating communication software that is tailor-made for the application. A similar approach is followed with the scheduling software. Schedulers in the form of a built-in a kernel are available all the time and cause overhead all the time. The proposed preprocessor tool generates scheduling software after analyzing the timing requirements of the particular application. This results in simple code for simple timing requirements and more complicated code for complex timing requirements. The tools have been implemented in Occam for use on a transputer. However, the results are valid for any distributed memory machine.