Abstract-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. Submitted in the categories: Scalability, Time-to-solution and Peak performance
Gaburov, et al. REF have published results on the evolution of the Milky Way galaxy, a calculation done using 18,600 GPUs on DOE Titan.
24.77 Pflops on a Gravitational Tree-Code to Simulate the Milky Way Galaxy with 18600 GPUs
SC14: International Conference for High Performance Computing, Networking, Storage and Analysis
SC14: International Conference for High Performance Computing, Networking, Storage and Analysis
Computer Science Physics