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The static polytope and its applications to a scheduling problem

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2 Author(s)
Subramani, E. ; Dept. of Comput. Sci., West Virginia Univ., Morgantown, WV, USA ; Agrawala, A.

In the design of real-time systems, it is often the ease that certain process parameters, such as execution time, are not known precisely. The challenge in real-time systems design is to develop techniques that efficiently meet the requirements of impreciseness. Traditional models tend to simplify the issue of impreciseness by assuming worst-case times. This assumption is unrealistic and at the same time, may cause certain constraints to be violated at run-time. In this paper, we study the problem of scheduling a set of ordered, non-preemptive processes under non-constant execution times. Typical applications for variable execution time scheduling include process scheduling in real-time operating systems such as Maruti compiler scheduling, database transaction scheduling and automated machine control. An important feature of application areas such as robotics is the interaction between execution times of various processes. We explicitly model this interaction through the representation of execution time vectors as points in convex sets. We present both sequential and parallel algorithms for determining the existence of a static schedule

Published in:

Factory Communication Systems, 2000. Proceedings. 2000 IEEE International Workshop on

Date of Conference:

2000