Encyclopedia of Parallel Computing

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Encyclopedia of Parallel Computing

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Adaptive Bitonic Sorting
(Springer, 2011)
Zachmann, Gabriel
Adaptive bitonic sorting is a sorting algorithm suitable for implementation on EREW parallel architectures. Similar to bitonic sorting, it is based on merging, which is recursively applied to obtain a sorted sequence. In contrast to bitonic sorting, it is data dependent. Adaptive bitonic merging can be performed in O(n/p) parallel time, p being the number of processors, and executes only O(n) operations in total. Consequently, adaptive bitonic sorting can be performed in O(n log n/p) time, which is optimal. So, one of its advantages is that it executes a factor of O(log n) less operations than bitonic sorting. Another advantage is that it can be implemented efficiently on modern GPUs.
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