arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2009.03555physics.comp-ph
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HONPAS中混合密度泛函计算的动态并行分布算法

The dynamic parallel distribution algorithm for hybrid density-functional calculations in HONPAS package

Honghui Shang, Lei Xu, Baodong Wu, Xinming Qin, Yunquan Zhang, Jinlong Yang

摘要:

本文提出了一种基于实空间NAO 2GTO框架的Hartree-Fock交换HFX计算的动态并行分布方案。采用2级主从动态并行算法实现了最耗时的电子排斥积分(ERI)计算的负载均衡,密度矩阵和HFX矩阵均以稀疏格式存储,仅通过传递批量ERI的索引和HFX矩阵的最终稀疏矩阵形式来最小化网络通信时间.在天河二号超级计算机上进行的大规模混合密度泛函计算(包括分子和固体的多维体系)表明了该动态可扩展分布式算法的性能,具有良好的可扩展性.

英文摘要:

This work presents a dynamic parallel distribution scheme for the Hartree-Fock exchange~(HFX) calculations based on the real-space NAO2GTO framework. The most time-consuming electron repulsion integrals~(ERIs) calculation is perfectly load-balanced with 2-level master-worker dynamic parallel scheme, the density matrix and the HFX matrix are both stored in the sparse format, the network communication time is minimized via only communicating the index of the batched ERIs and the final sparse matrix form of the HFX matrix. The performance of this dynamic scalable distributed algorithm has been demonstrated by several examples of large scale hybrid density-functional calculations on Tianhe-2 supercomputers, including both molecular and solid states systems with multiple dimensions, and illustrates good scalability.

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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