Cosmological neutrino simulations at extreme scale
文献类型：期刊论文
| 作者 | 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
 |
| 出版日期 | 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 |
| WOS记录号 | WOS:000416068900009 |
| 出版者 | NATL ASTRONOMICAL OBSERVATORIES, CHIN ACAD SCIENCES |
| URI标识 | http://www.irgrid.ac.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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