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Parallel execution of programs requires more resources and more complex resource management than sequential execution. If concurrent tasks can be spawned dynamically, programs may require an inordinate amount of resources when the potential parallelism in the program is much greater than the amount of parallelism the machine can exploit. We describe loop bounding , a technique for dynamically controlling the amount of parallelism exposed in dataflow programs. The effectiveness of the technique in reducing token storage requirements is supported by experimental data in the form of parallelism profiles and waiting-token profiles . Comparisons are made throughout with more conventional approaches to parallel computing.
Culler et al. (Tue,) studied this question.