Abstract
Presents a model of coarse grain dataflow execution. The authors present one top down and two bottom up methods for generation of multithreaded code, and evaluate their effectiveness. The bottom up techniques start from a fine-grain dataflow graph and coalesce this into coarse-grain clusters. The top down technique generates clusters directly from the intermediate data dependence graph used for compiler optimizations. The authors discuss the relevant phases in the compilation process. They compare the effectiveness of the strategies by measuring the total number of clusters executed, the total number of instructions executed, cluster size, and number of matches per cluster. It turns out that the top down method generates more efficient code, and larger clusters. However the number of matches per cluster is larger for the top down method, which could incur higher cluster synchronization costs. >
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