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Employing multi-GPU power for molecular dynamics simulation: an extension of GALAMOST
作者:Y.-L. Zhu, D. Pan, Z.-W. Li, H. Liu, H.-J. Qian, Y. Zhao, Z.-Y. Lu, Z.-Y. Sun
關鍵字:An extension of GALAMOST
論文來源:期刊
具體來源:Molecular Physics, 116, 7-8:1-13 (2018)
發表時間:2018年
We describe the algorithm of employing multi-GPU power on the basis of Message Passing Interface (MPI) domain decomposition in a molecular dynamics code, GALAMOST, which is designed for the coarse-grained simulation of soft matters. The code of multi-GPU version is developed based on our previous single-GPU version. In multi-GPU runs, one GPU takes charge of one domain and runs single-GPU code path. The communication between neighbouring domains takes a similar algorithm of CPU-based code of LAMMPS, but is optimised specifically for GPUs. We employ a memory-saving design which can enlarge maximum system size at the same device condition. An optimisation algorithm is employed to prolong the update period of neighbour list. We demonstrate good performance of multi-GPU runs on the simulation of Lennard–Jones liquid, dissipative particle dynamics liquid, polymer and nanoparticle composite, and two-patch particles on workstation. A good scaling of many nodes on cluster for two-patch particles is presented.
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