A new parallel simulation technique

JOURNAL OF COMPUTATIONAL PHYSICS

卷:231

Article

Blanco-Pillado, Jose J.¹  Olum, Ken D.¹  Shlaer, Benjamin¹ 

[1] Tufts Univ, Dept Phys & Astron, Inst Cosmol, Medford, MA 02155 USA

关键词: Simulation;    Parallel processing;    Cosmic strings;   

DOI  :  10.1016/j.jcp.2011.08.029

来源: Elsevier

【 摘 要 】

We develop a semi-parallel simulation technique suggested by Pretorius and Lehner, in which the simulation spacetime volume is divided into a large number of small 4-volumes that have only initial and final surfaces. Thus there is no two-way communication between processors, and the 4-volumes can be simulated independently and potentially at different times. This technique allows us to simulate much larger volumes than we otherwise could, because we are not limited by total memory size. No processor time is lost waiting for other processors. We compare a cosmic string simulation we developed using the semi-parallel technique with our previous MPI-based code for several test cases and find a factor of 2.6 improvement in the total amount of processor time required to accomplish the same job for strings evolving in the matter-dominated era. (C) 2011 Elsevier Inc. All rights reserved.

【 授权许可】

Free