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arXiv 1407.8142cs.DScs.DC
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并行小波树构造

Parallel Wavelet Tree Construction

Julian Shun

摘要:

我们提出了并行算法的小波树建设与多对数深度,改进Fuentes-Sepulveda等人最近的并行算法的线性深度。我们实验表明,在一个40核的机器上,双向超线程,我们优于现有的并行算法的1.3- 5.6倍,并实现高达27倍的加速比在各种现实世界和人工输入的顺序算法。随着线程数、输入大小和字母表大小的增加,我们的算法表现出良好的可扩展性。我们还讨论了标准小波树的变体的扩展。

英文摘要:

We present parallel algorithms for wavelet tree construction with polylogarithmic depth, improving upon the linear depth of the recent parallel algorithms by Fuentes-Sepulveda et al. We experimentally show on a 40-core machine with two-way hyper-threading that we outperform the existing parallel algorithms by 1.3--5.6x and achieve up to 27x speedup over the sequential algorithm on a variety of real-world and artificial inputs. Our algorithms show good scalability with increasing thread count, input size and alphabet size. We also discuss extensions to variants of the standard wavelet tree.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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