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Investigation of Parallel Programming Techniques Applied to Monte Carlo Simulations for Post-Flight Reconstruction of Spacecraft Trajectory.
| 题名： | Investigation of Parallel Programming Techniques Applied to Monte Carlo Simulations for Post-Flight Reconstruction of Spacecraft Trajectory. |
| 作者： | Williams, R. A.; Green, J. S. |
| 关键词： | Parallel programming, Monte carlo method, Computerized simulation, Spacecraft trajectories, Trajectory analysis, Central processing units, Computer graphics, Multiprocessing (computers), Algorithms, Flight simulation, Supercomputers, Matrices (mathematics), Nasa programs |
| 摘要： | Parallelizing software to execute on multi-core central processing units (CPUs) and graphics processing units (GPUs) can be challenging. For some fields outside of Computer Science, this transition comes with new issues. For example, memory limitations can require modifications to code not initially developed to run on GPUs. This work applies the Open Multi-Processing (OpenMP) and Open Accelerators (OpenACC) directive-based parallelization strategies on a Monte Carlo simulation approach for trajectory reconstruction enabling it to run on multi-core CPUs and GPUs. Large matrix operations are the most common use of GPUs, which are not present in this algorithm; however, the natural parallelism of independent trajectories in Monte Carlo simulations is exploited. Benchmarking data are presented comparing execution times of the software for single-thread CPUs, multi-thread CPUs with OpenMP, and multi-thread GPUs using OpenACC. These data were collected using nodes with Intel庐 Xeon庐 E5-2670 (Sandy Bridge) CPUs enhanced with NVIDIA庐 Tesla庐 K40 GPUs on the Pleiades Supercomputer cluster at the National Aeronautics and Space Administration (NASA) Ames Research Center (ARC) and a local Intel庐 Xeon Phi鈩?node at NASA Langley Research Center (LaRC). |
| 报告类型： | 科技报告 |
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