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IEICE TRANSACTIONS on Information

Efficient Parallel Join Processing Exploiting SIMD in Multi-Thread Environments

Gilseok HONG, Seonghyeon KANG, Chang soo KIM, Jun-Ki MIN

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Summary :

In this paper, we study parallel join processing to improve the performance of the merge phase of sort-merge join by integrating all parallelism provided by mainstream CPUs. Modern CPUs support SIMD instruction sets with wider SIMD registers which allows to process multiple data items per each instruction. Thus, we devise an efficient parallel join algorithm, called Parallel Merge Join with SIMD instructions (PMJS). In our proposed algorithm, we utilize data parallelism by exploiting SIMD instructions. And we also accelerate the performance by avoiding the usage of conditional branch instructions. Furthermore, to take advantage of the multiple cores, our proposed algorithm is threaded in multi-thread environments. In our multi-thread algorithm, to distribute workload evenly to each thread, we devise an efficient workload balancing algorithm based on the kernel density estimator which allows to estimate the workload of each thread accurately.

Publication
IEICE TRANSACTIONS on Information Vol.E101-D No.3 pp.659-667
Publication Date
2018/03/01
Publicized
2017/12/14
Online ISSN
1745-1361
DOI
10.1587/transinf.2017EDP7300
Type of Manuscript
PAPER
Category
Data Engineering, Web Information Systems

Authors

Gilseok HONG
  Korea Univ. of Tech. & Edu.
Seonghyeon KANG
  Korea Univ. of Tech. & Edu.
Chang soo KIM
  ETRI
Jun-Ki MIN
  Korea Univ. of Tech. & Edu.

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