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	Cosmological neutrino simulations at extreme scale
	Emberson, J. D.1,2,3; Yu, Hao-Ran1,4,5; Inman, Derek1,6; Zhang, Tong-Jie5,7; Pen, Ue-Li1,8,9,10; Harnois-Deraps, Joachim11,12; Yuan, Shuo13; Teng, Huan-Yu5; Zhu, Hong-Ming14; Chen, Xuelei14
刊名	Research in astronomy and astrophysics
	2017-08-01
卷号	17期号:8页码:12
关键词	Cosmology: theory Large-scale structure of universe Methods: numerical
ISSN号	1674-4527
DOI	10.1088/1674-4527/17/8/85
通讯作者	Emberson, j. d.(emberson@astro.utoronto.ca)
英文摘要	Constraining neutrino mass remains an elusive challenge in modern physics. precision measurements are expected from several upcoming cosmological probes of large-scale structure. achieving this goal relies on an equal level of precision from theoretical predictions of neutrino clustering. numerical simulations of the non-linear evolution of cold dark matter and neutrinos play a pivotal role in this process. we incorporate neutrinos into the cosmological n-body code cubep3m and discuss the challenges associated with pushing to the extreme scales demanded by the neutrino problem. we highlight code optimizations made to exploit modern high performance computing architectures and present a novel method of data compression that reduces the phase-space particle footprint from 24 bytes in single precision to roughly 9 bytes. we scale the neutrino problem to the tianhe-2 supercomputer and provide details of our production run, named tiannu, which uses 86% of the machine (13 824 compute nodes). with a total of 2.97 trillion particles, tiannu is currently the world's largest cosmological n body simulation and improves upon previous neutrino simulations by two orders of magnitude in scale. we finish with a discussion of the unanticipated computational challenges that were encountered during the tiannu runtime.
WOS关键词	MASSIVE NEUTRINOS ; MATTER ; GALAXIES ; OSCILLATIONS ; SEARCH
WOS研究方向	Astronomy & Astrophysics
WOS类目	Astronomy & Astrophysics
语种	英语
出版者	NATL ASTRONOMICAL OBSERVATORIES, CHIN ACAD SCIENCES
WOS记录号	WOS:000416068900009
内容类型	期刊论文
URI标识	http://www.corc.org.cn/handle/1471x/2178290
专题	高能物理研究所
通讯作者	Emberson, J. D.
作者单位	1.Univ Toronto, Canadian Inst Theoret Astrophys, Toronto, ON M5S 3H8, Canada 2.Univ Toronto, Dept Astron & Astrophys, Toronto, ON M5S 3H4, Canada 3.Argonne Natl Lab, ALCF Div, Lemont, IL 60439 USA 4.Peking Univ, Kavli Inst Astron & Astrophys, Beijing 100871, Peoples R China 5.Beijing Normal Univ, Dept Astron, Beijing 100875, Peoples R China 6.Univ Toronto, Dept Phys, Toronto, ON M5S 1A7, Canada 7.Dezhou Univ, Shandong Prov Key Lab Biophys, Sch Phys & Elect Informat, Dezhou 253023, Peoples R China 8.Univ Toronto, Dunlap Inst Astron & Astrophys, Toronto, ON M5S 3H4, Canada 9.Canadian Inst Adv Res, Program Cosmol & Gravitat, Toronto, ON, Canada 10.Perimeter Inst Theoret Phys, Waterloo, ON N2L 2Y5, Canada
推荐引用方式 GB/T 7714	Emberson, J. D.,Yu, Hao-Ran,Inman, Derek,et al. Cosmological neutrino simulations at extreme scale[J]. Research in astronomy and astrophysics,2017,17(8):12.
APA	Emberson, J. D..,Yu, Hao-Ran.,Inman, Derek.,Zhang, Tong-Jie.,Pen, Ue-Li.,...&Xing, Zhi-Zhong.(2017).Cosmological neutrino simulations at extreme scale.Research in astronomy and astrophysics,17(8),12.
MLA	Emberson, J. D.,et al."Cosmological neutrino simulations at extreme scale".Research in astronomy and astrophysics 17.8(2017):12.

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