GreeM: Massively Parallel TreePM Code for Large Cosmological N-body Simulations

被引：79

作者：

Ishiyama, Tomoaki ^{[1
,2
]}

Fukushige, Toshiyuki ^{[3
]}

Makino, Junichiro ^{[1
]}

机构：

[1] Natl Astron Observ Japan, Tokyo 1818588, Japan

[2] Univ Tokyo, Dept Gen Syst Studies, Coll Arts & Sci, Meguro Ku, Tokyo 1538902, Japan

[3] K&F Comp Res Co, Tokyo 1820026, Japan

来源：

PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN | 2009年 / 61卷 / 06期

基金：

日本学术振兴会;

关键词：

methods: n-body simulations; cosmology: miscellaneous; SPECIAL-PURPOSE COMPUTER; PARTICLE-MESH; GRAVITY SOLVER; TREECODE; GRAPE; ALGORITHM; SYSTEMS; HALOS;

D O I：

10.1093/pasj/61.6.1319

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

In this paper, we describe the implementation and performance of GreeM, a massively parallel TreePM code for large-scale cosmological N-body simulations. GreeM uses a recursive multi-section algorithm for domain decomposition. The size of the domains are adjusted so that the total calculation time of the force becomes the same for all processes. The loss of performance due to non-optimal load balancing is around 4%, even for more than 10(3) CPU cores. GreeM runs efficiently on PC clusters and massively-parallel computers, such as a Cray XT4. The measured calculation speed on Cray XT4 is 5 x 10(4) particles per second per CPU core, for the case of an opening angle of theta = 0.5, if the number of particles per CPU core is larger than 10(6).

引用

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页码：1319 / 1330

页数：12

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