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Analyzing time-dimension communication characterizations for representative scientific applications on supercomputer systems

机译：分析超级计算机系统代表科学应用的时间维通信特性

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摘要

Exascale computing is one of the major challenges of this decade, and several studies have shown that communications are becoming one of the bottlenecks for scaling parallel applications. The analysis on the characteristics of communications can effectively aid to improve the performance of scientific applications. In this paper, we focus on the statistical regularity in time-dimension communication characteristics for representative scientific applications on supercomputer systems, and then prove that the distribution of communication-event intervals has a power-law decay, which is common in scientific interests and human activities. We verify the distribution of communication-event intervals has really a power-law decay on the Tianhe-2 supercomputer, and also on the other six parallel systems with three different network topologies and two routing policies. In order to do a quantitative study on the power-law distribution, we exploit two groups of statistics: bursty vs. memory and periodicity vs. dispersion. Our results indicate that the communication events show a strong-bursty and weak-memory characteristic and the communication event intervals show the periodicity and the dispersion. Finally, our research provides an insight into the relationship between communication optimizations and time-dimension communication characteristics.
机译：ExaScale Computing是本十年的主要挑战之一，几项研究表明，通信正在成为扩展并行应用的瓶颈之一。通信特征分析可以有效地帮助改善科学应用的性能。在本文中，我们专注于超级计算机系统上代表科学应用的时间尺寸通信特征的统计规律性，然后证明了通信事件间隔的分布具有幂律衰减，这是科学兴趣和人类的常见活动。我们验证了通信事件间隔的分布在天河2超级计算机上具有幂律衰减，以及其他六个不同网络拓扑和两个路由策略的另外六个并行系统。为了对幂律分布进行定量研究，我们利用两组统计：爆发与内存和周期性与分散。我们的结果表明，通信事件显示出强烈突发和弱存储器特性，并且通信事件间隔显示周期性和色散。最后，我们的研究提供了洞察通信优化与时间尺寸通信特性之间的关系。

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  • 来源
    《Frontiers of computer science》 |2019年第6期|1228-1242|共15页
  • 作者

    Chen Juan; Zhou Wenhao; Dong Yong; Wang Zhiyuan; Cui Chen; Wu Feihao; Zhou Enqiang; Tang Yuhua;

  • 作者单位

    Natl Univ Def Technol Coll Comp State Key Lab High Performance Comp Changsha 410073 Hunan Peoples R China;

    Natl Univ Def Technol Coll Comp State Key Lab High Performance Comp Changsha 410073 Hunan Peoples R China;

    Natl Univ Def Technol Coll Comp State Key Lab High Performance Comp Changsha 410073 Hunan Peoples R China;

    Natl Univ Def Technol Coll Comp State Key Lab High Performance Comp Changsha 410073 Hunan Peoples R China;

    Natl Univ Def Technol Coll Comp State Key Lab High Performance Comp Changsha 410073 Hunan Peoples R China;

    Natl Univ Def Technol Coll Comp State Key Lab High Performance Comp Changsha 410073 Hunan Peoples R China;

    Natl Univ Def Technol Coll Comp State Key Lab High Performance Comp Changsha 410073 Hunan Peoples R China;

    Natl Univ Def Technol Coll Comp State Key Lab High Performance Comp Changsha 410073 Hunan Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    power-law distributions; supercomputer systems; time-dimension communication characteristics; Tianhe-2;

    机译：幂律分布;超级计算机系统;时间尺寸通信特征;天河2;

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