24.77 Pflops on a gravitational tree-code to simulate the Milky Way Galaxy with 18600 GPUs

We have simulated, for the first time, the long term evolution of the Milky Way Galaxy using 51 billion particles on the Swiss Piz Daint supercomputer with our N-body gravitational tree-code Bonsai. Herein, we describe the scientific motivation and numerical algorithms. The Milky Way model was simul...

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Vydáno v:Proceedings of the International Conference for High Performance Computing, Networking, Storage and Analysis s. 54 - 65
Hlavní autoři: Bédorf, Jeroen, Gaburov, Evghenii, Fujii, Michiko S., Nitadori, Keigo, Ishiyama, Tomoaki, Zwart, Simon Portegies
Médium: Konferenční příspěvek
Jazyk:angličtina
Vydáno: Piscataway, NJ, USA IEEE Press 16.11.2014
IEEE
Edice:ACM Conferences
Témata:
Applied computing > Physical sciences and engineering > Astronomy
Computational modeling
Computer systems organization > Dependable and fault-tolerant systems and networks
Computing methodologies > Modeling and simulation
General and reference > Cross-computing tools and techniques > Performance
Graphics processing units
Gravity
Instruction sets
Networks > Network performance evaluation
Submitted in the categories: Scalability
Supercomputers
Time-to-solution and Peak performance
Submitted in the categories: Scalability
Time-to-solution and Peak performance
ISBN:1479955000, 9781479955008
ISSN:2167-4329
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Shrnutí:We have simulated, for the first time, the long term evolution of the Milky Way Galaxy using 51 billion particles on the Swiss Piz Daint supercomputer with our N-body gravitational tree-code Bonsai. Herein, we describe the scientific motivation and numerical algorithms. The Milky Way model was simulated for 6 billion years, during which the bar structure and spiral arms were fully formed. This improves upon previous simulations by using 1000 times more particles, and provides a wealth of new data that can be directly compared with observations. We also report the scalability on both the Swiss Piz Daint and the US ORNL Titan. On Piz Daint the parallel efficiency of Bonsai was above 95%. The highest performance was achieved with a 242 billion particle Milky Way model using 18600 GPUs on Titan, thereby reaching a sustained GPU and application performance of 33.49 Pflops and 24.77 Pflops respectively.
ISBN:1479955000
9781479955008
ISSN:2167-4329
DOI:10.1109/SC.2014.10