Comparison of parallel sorting algorithms

Darko Bozidar, Tomaz Dobravec
Faculty of Computer and Information Science, University of Ljubljana, Slovenia
arXiv:1511.03404 [cs.DC], (11 Nov 2015)

   title={Comparison of parallel sorting algorithms},

   author={Bozidar, Darko and Dobravec, Tomaz},






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In our study we implemented and compared seven sequential and parallel sorting algorithms: bitonic sort, multistep bitonic sort, adaptive bitonic sort, merge sort, quicksort, radix sort and sample sort. Sequential algorithms were implemented on a central processing unit using C++, whereas parallel algorithms were implemented on a graphics processing unit using CUDA platform. We chose these algorithms because to the best of our knowledge their sequential and parallel implementations were not yet compared all together in the same execution environment. We improved the above mentioned implementations and adopted them to be able to sort input sequences of arbitrary length. We compared algorithms on six different input distributions, which consisted of 32-bit numbers, 32-bit key-value pairs, 64-bit numbers and 64-bit key-value pairs. In this report we give a short description of seven sorting algorithms and all the results obtained by our tests.
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