Binsorting on hypercubes with d-port communication

Document Type

Conference Proceeding

Publication Date

1-3-1989

Abstract

© ACM 1988 0-89791-278-0/88/0007/1592. Three sorting algorithms are given for hypercubes with d-port communication, All of these algorithms are based on binsort at the global level. The binsort allows the movement of keys among nodes to be performed by a d-port complete exchange rather than a sequence of l-port exchanges as in other algorithms. This lowers communication costs by at least a factor of d compared to other sorting algorithms. The first algorithm assumes the keys are uniformly distributed and selects bin boundaries based on the global maximum and minimum keys. The other two algorithms make no assumption about the distribution of keys and so they sample the keys before the binsort in order to estimate their distribution. Splitting keys based on that estimate reduce the variance among the lengths of the subsequences left in the nodes after the complete exchange of bins which in turn helps to balance the computational load in each node. The performance of two of these algorithms on an FPS T-40 is given for data of various distributions and is compared to the performance of bitonic sort and hyperquicksort.

Publication Title

Proceedings of the 3rd Conference on Hypercube Concurrent Computers and Applications: Architecture, Software, Computer Systems, and General Issues, C3P 1988

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