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Adaptive Bitonic Sorting: An Optimal Parallel Algorithm for Shared Memory Machines

Author
Bilardi, Gianfranco; Nicolau, Alexandru
Abstract
We propose a parallel algorithm, called adaptive bitonic sorting, which runs on a PRAC, a shared-memory multiprocessor where fetch and store conflicts are disallowed. On a $P$ processors PRAC, our algorithm achieves optimal performance $TP = O(N \log N)$, for any computation time $T$ in the range $\Omega (\log^{2} N) \leq T \leq O(N \log N)$. Adaptive bitonic sorting has also a small constant factor, since it performs less than $2N \log N$ comparisons, and only a handful of operations per comparison.
Date Issued
1986-08Publisher
Cornell University
Subject
computer science; technical report
Previously Published As
http://techreports.library.cornell.edu:8081/Dienst/UI/1.0/Display/cul.cs/TR86-769
Type
technical report