Graph allocation in static dataflow systems

Authors:
Y. C. Hong;T. H. Payne;L. B O Ferguson
Affiliations:
Department of Mathematics & Computer Science, University of California, Riverside, CA;Department of Mathematics & Computer Science, University of California, Riverside, CA;Department of Mathematics & Computer Science, University of California, Riverside, CA
Venue:
ISCA '86 Proceedings of the 13th annual international symposium on Computer architecture
Year:
1986

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Abstract

One of the most important considerations for a dataflow multiprocessor is the algorithm by which the nodes of a program graph are allocated for execution to its processors. In the case of the static type of architecture one must consider pipelining as well as spatial concurrency. This paper uses a graph partitioning scheme to aid in the design of such algorithms and selection of the associated interconnection topology. The scheme first refines the usual dataflow program graph and then partitions it into “trees.” Our study shows that the hypercube interconnection accommodates these trees in a way that allows as to develop an algorithm that places producer nodes (of a dataflow graph) nears their consumers to keep the message path very short. The algorithm achieves concurrency in simultaneous execution of subgraphs that involve parallel operations, e.g., array operations, and subgraphs that are highly iterative or recursive. An analytical model is given to evaluate the performance of the algorithm.