Efficient GPU-Implementation of H-P Sort Based on Improved Histogram Computation

We present an enhanced GPU implementation of the H-P sort algorithm, which is a widely used method for integer sorting based on histogram computation and prefix sum calculation. This work extends a previous high-performance GPU version of the algorithm, presented at the 2021 ICPP international conference. Through algorithmic refinements and optimizations, we demonstrate significant performance improvements compared to the conventional H-P sort. It achieves a maximum speedup of 3.45x over conventional H-P Sort. Furthermore, in scenarios where the H-P sort had previously lagged behind the fastest available library, our improved implementation now surpasses it in terms of execution speed. This advancement in GPU-based sorting techniques contributes to more efficient data processing in various computational applications, emphasizing the practical significance of this work.