A hybrid MPI/OpenMP parallel computing model for spherical discontinuous deformation analysis

A hybrid MPI/OpenMP parallel computing model for spherical discontinuous deformation analysis
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球形不连续变形分析的混合MPI/OpenMP并行计算模型

DOI:
10.1016/j.compgeo.2018.11.004
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发表时间:
2019-02
影响因子:
5.3
通讯作者:
Tan F
Tan F
中科院分区:
工程技术2区
文献类型:
--
作者:
Jiao YY;Zhao Q;Wang L;Huang GH;Tan F

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采用球面不连续变形分析(SDDA)进行大规模数值模拟耗时长,阻碍了SDDA方法在模拟大规模离散球面系统中的应用。影响SDDA程序计算效率的一个关键因素是线性方程的求解器。为了解决这一问题,本文用适用于并行计算的共轭梯度迭代法取代了SDDA中原有的平衡方程求解器,并提出了纯MPI (Massage Passing Interface)、纯OpenMP和混合MPI+OpenMP三种并行计算模型,研究哪种模型更适合SDDA。将并行化算法整合到原有的SDDA源代码中,并在Sugon TC4600高性能计算集群上实现了修改后的程序。通过三个数值算例的仿真验证,结果表明所提出的混合并行化模型是正确有效的。
Large-scale numerical simulation using spherical discontinuous deformation analysis (SDDA) is time-consuming, and this obstructs the application of the SDDA method for simulating the large-scale discrete spherical system. A key factor that affects the computational efficiency of the SDDA program is the solver of linear equations. To solve this problem, this paper replaces the original equilibrium equations solvers in SDDA by the conjugate gradient iterative method which is applicable for parallel computing, and three parallel computing models, i.e. pure MPI (Massage Passing Interface), pure OpenMP and hybrid MPI+OpenMP, are proposed to investigate which is better for SDDA. The parallelization algorithms are incorporated into the original SDDA source code, and the modified program is implemented on the high-performance computing clusters of Sugon TC4600. Three numerical examples are simulated for verification, and the results demonstrate that the proposed hybrid parallelization model is correct and effective.
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