PPPM and TreePM methods on GRAPE systems for cosmological N-body simulations
PPPM and TreePM methods on GRAPE systems for cosmological N-body simulations
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DOI：
10.1093/pasj/57.6.849
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发表时间：
2005-12-25
影响因子：
2.3
通讯作者：
Fukushige, T
中科院分区：
文献类型：
--
作者：
Yoshikawa, K;Fukushige, T
我们介绍了粒子网格(PPPM)和树状粒子网格(TreePM)在GRAPE-5和GRAPE-6A系统上的实现，这两个系统是用于引力多体模拟的专用硬件加速器。在GRPE上的PPPM和TreePM实现中，与没有GRPE的传统实现相比，计算时间显著减少，特别是在强粒子聚类的情况下，并且无论粒子聚类的程度如何，计算时间几乎是恒定的。我们描述了我们对两个模拟参数的考察，即PM网格间距和开度参数，以实现力的精度和计算速度的最佳组合。我们还描述了这些实现在PC-GRAPE集群上的并行化，其中每个节点都有一个GRAPE板，并给出了为获得良好的并行可伸缩性而优化的模拟参数配置。
We present Particle-Particle-Particle-Mesh (PPPM) and Tree Particle-Mesh (TreePM) implementations on GRAPE-5 and GRAPE-6A systems, special-purpose hardware accelerators for gravitational many-body simulations. In our PPPM and TreePM implementations on GRAPE, the computational time is significantly reduced compared with the conventional implementations without GRAPE, especially under strong particle clustering, and is almost constant irrespective of the degree of particle clustering. We describe our survey of two simulation parameters, the PM grid spacing and the opening parameter for the most optimal combination of force accuracy and computational speed. We also describe the parallelization of these implementations on a PC-GRAPE cluster, in which each node has one GRAPE board, and present the optimal configuration of simulation parameters for good parallel scalability.