GRAVIDY, a GPU modular, parallel direct-summation N-body integrator: dynamics with softening

doi:10.1093/mnras/stx2468

	GRAVIDY, a GPU modular, parallel direct-summation N-body integrator: dynamics with softening
	Maureira-Fredes, Cristian 1,2; Amaro-Seoane, Pau 3,4,5
刊名	MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
	2018
卷号	473 期号:3 页码:3113-3127
关键词	methods: numerical celestial mechanics stars: kinematics and dynamics
ISSN号	0035-8711
DOI	10.1093/mnras/stx2468
英文摘要	A wide variety of outstanding problems in astrophysics involve the motion of a large number of particles under the force of gravity. These include the global evolution of globular clusters, tidal disruptions of stars by a massive black hole, the formation of protoplanets and sources of gravitational radiation. The direct-summation of N gravitational forces is a complex problem with no analytical solution and can only be tackled with approximations and numerical methods. To this end, the Hermite scheme is a widely used integration method. With different numerical techniques and special-purpose hardware, it can be used to speed up the calculations. But these methods tend to be computationally slow and cumbersome to work with. We present a new graphics processing unit (GPU), direct-summation N-body integrator written from scratch and based on this scheme, which includes relativistic corrections for sources of gravitational radiation. GRAVIDY has high modularity, allowing users to readily introduce new physics, it exploits available computational resources and will be maintained by regular updates. GRAVIDY can be used in parallel on multiple CPUs and GPUs, with a considerable speed-up benefit. The single-GPU version is between one and two orders of magnitude faster than the single-CPU version. A test run using four GPUs in parallel shows a speed-up factor of about 3 as compared to the single-GPU version. The conception and design of this first release is aimed at users with access to traditional parallel CPU clusters or computational nodes with one or a few GPU cards.
资助项目	Ramon y Cajal Programme of the Ministry of Economy, Industry and Competitiveness of Spain ; CAS President's International Fellowship Initiative ; 'Direccion General de Investigaci on y Postgrado' (DGIP) by 'Programa Incentivo a la Iniciacion Cientifica' (PIIC) at the Universidad Tecnica Federico Santa Maria ; 'Comision Nacional de Investigacion Cientifica y Tecnologica de Chile' (CONICYT) through its Master scholarships programme ; Deutsche Forschungsgemeinschaft DFG (German Research Foundation)[Transregio 7] ; DFG Project 'Supermassive black holes, accretion discs, stellar dynamics and tidal disruptions' ; International Max-Planck Research School
WOS研究方向	Astronomy & Astrophysics
语种	英语
出版者	OXFORD UNIV PRESS
WOS记录号	WOS:000423809400019
内容类型	期刊论文
源URL	[http://ir.amss.ac.cn/handle/2S8OKBNM/29458]
专题	中国科学院数学与系统科学研究院
通讯作者	Maureira-Fredes, Cristian; Amaro-Seoane, Pau
作者单位	1.Albert Einstein Inst, Max Planck Inst Gravitat Phys, D-14476 Potsdam, Germany 2.Univ Tecn Federico Santa Maria, Ave Espana 1680, Valparaiso, Chile 3.IEEC, CSIC, Inst Ciencies Espai, Campus UAB,Carrer Can Magrans S-N, E-08193 Barcelona, Spain 4.Chinese Acad Sci, Acad Math & Syst Sci, Inst Appl Math, Beijing 100190, Peoples R China 5.Kavli Inst Astron & Astrophys, Beijing 100871, Peoples R China
推荐引用方式 GB/T 7714	Maureira-Fredes, Cristian,Amaro-Seoane, Pau. GRAVIDY, a GPU modular, parallel direct-summation N-body integrator: dynamics with softening[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2018,473(3):3113-3127.
APA	Maureira-Fredes, Cristian,&Amaro-Seoane, Pau.(2018).GRAVIDY, a GPU modular, parallel direct-summation N-body integrator: dynamics with softening.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,473(3),3113-3127.
MLA	Maureira-Fredes, Cristian,et al."GRAVIDY, a GPU modular, parallel direct-summation N-body integrator: dynamics with softening".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 473.3(2018):3113-3127.