Scalable Atomistic Simulation Algorithms for Materials Research

Author:

Nakano Aiichiro1,Kalia Rajiv K.1,Vashishta Priya1,Campbell Timothy J.2,Ogata Shuji3,Shimojo Fuyuki4,Saini Subhash5

Affiliation:

1. Department of Computer Science, Department of Materials Science & Engineering, Department of Physics & Astronomy, Department of Biomedical Engineering, University of Southern California, Los Angeles, CA 90089, USA, and Concurrent Computing Laboratory for Materials Simulations, Biological Computation and Visualization Center, Department of Computer Science, Department, USA

2. Naval Oceanographic Office, Stennis Space Center, MS 39529, USA

3. Department of Applied Sciences, Yamaguchi University, Ube 755-8611, Japan

4. Faculty of Integrated Arts and Sciences, Hiroshima University, Higashi-Hiroshima 739-0046, Japan

5. IT Modeling and Simulation, NASA Ames Research Center, Moffett Field, CA 94035-1000, USA

Abstract

A suite of scalable atomistic simulation programs has been developed for materials research based on space-time multiresolution algorithms. Design and analysis of parallel algorithms are presented for molecular dynamics (MD) simulations and quantum-mechanical (QM) calculations based on the density functional theory. Performance tests have been carried out on 1,088-processor Cray T3E and 1,280-processor IBM SP3 computers. The linear-scaling algorithms have enabled 6.44-billion-atom MD and 111,000-atom QM calculations on 1,024 SP3 processors with parallel efficiency well over 90%. production-quality programs also feature wavelet-based computational-space decomposition for adaptive load balancing, spacefilling-curve-based adaptive data compression with user-defined error bound for scalable I/O, and octree-based fast visibility culling for immersive and interactive visualization of massive simulation data.

Publisher

Hindawi Limited

Subject

Computer Science Applications,Software

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