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Parallel String Sample Sort

Parallel String Sample Sort

Timo Bingmann and Peter Sanders


Technial Report May 2013, arXiv:1305.1157

Date: 2013-05-06


We discuss how string sorting algorithms can be parallelized on modern multi-core shared memory machines. As a synthesis of the best sequential string sorting algorithms and successful parallel sorting algorithms for atomic objects, we propose string sample sort. The algorithm makes effective use of the memory hierarchy, uses additional word level parallelism, and largely avoids branch mispredictions. Additionally, we parallelize variants of multikey quicksort and radix sort that are also useful in certain situations.