Hierarchical Parallelism of Bit-Parallel Algorithm for Approximate String Matching on GPUs

Approximate string matching has been widely used in many areas, such as web searching, and deoxyribonucleic acid sequence matching, etc. Approximate string matching allows difference between a string and a pattern caused by insertion, deletion and substitution. Because approximate string matching is...

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Vydáno v:	2014 IEEE Symposium on Computer Applications and Communications s. 76 - 81
Hlavní autoři:	Cheng Hung Lin, Guan Hong Wang, Chun Cheng Huang
Médium:	Konferenční příspěvek
Jazyk:	angličtina
Vydáno:	IEEE 01.07.2014
Témata:	Acceleration approximate string matching Approximation algorithms bit-parallel algorithm Data transfer graphic processing units Graphics processing units Kernel Parallel processing Pattern matching
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Shrnutí:	Approximate string matching has been widely used in many areas, such as web searching, and deoxyribonucleic acid sequence matching, etc. Approximate string matching allows difference between a string and a pattern caused by insertion, deletion and substitution. Because approximate string matching is a data-intensive task, accelerating approximate string matching has become crucial for processing big data. In this paper, we propose a hierarchical parallelism approach to accelerate the bit-parallel algorithm on NVIDIA GPUs. A data parallelism approach is used to accelerate the kernel of the bit-parallel algorithm while a task parallelism approach is used to overlap data transfer with kernel computation. In addition, we propose to use hashing to reduce the memory usage and achieve 98.4% of memory reduction. The experimental results show that the bit-parallel algorithm performed on GPUs achieves 7 to 11 times faster than the multithreaded CPU implementation. Compared to the state-of-the-art approaches, the proposed approach achieves 2.8 to 104.8 times improvement.
DOI:	10.1109/SCAC.2014.23