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Towards a portable and future-proof particle-in-cell plasma physics code
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Bird, Robert F., Pennycook, Simon J., Wright, Steven A. and Jarvis, Stephen A. (2013) Towards a portable and future-proof particle-in-cell plasma physics code. In: 1st International Workshop on OpenCL (IWOCL 13), Atlanta, USA, 13 - 14 May 2013
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Abstract
We present the first reported OpenCL implementation of EPOCH3D, an extensible particle-in-cell plasma physics code developed at the University of Warwick. We document the challenges and successes of this porting effort, and compare the performance of our implementation executing on a wide variety of hardware from multiple vendors. The focus of our work is on understanding the suitability of existing algorithms for future accelerator-based architectures, and identifying the changes necessary to achieve performance portability for particle-in-cell plasma physics codes.
We achieve good levels of performance with limited changes to the algorithmic behaviour of the code. However, our results suggest that a fundamental change to EPOCH3D’s current accumulation step (and its dependency on atomic operations) is necessary in order to fully utilise the massive levels of parallelism supported by emerging parallel architectures.
| Item Type: | Conference Item (Paper) | ||||
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| Subjects: | Q Science > QA Mathematics Q Science > QC Physics |
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| Divisions: | Faculty of Science > Computer Science | ||||
| Library of Congress Subject Headings (LCSH): | Algorithms, Optimisation, Physics, Plasma cells | ||||
| Official Date: | 2013 | ||||
| Dates: |
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| Status: | Peer Reviewed | ||||
| Publication Status: | Published | ||||
| Access rights to Published version: | Open Access | ||||
| Funder: | Engineering and Physical Sciences Research Council (EPSRC), Royal Society (Great Britain) | ||||
| Grant number: | EP/I029117/1 (EPSRC) ; IF090020/AM | ||||
| Conference Paper Type: | Paper | ||||
| Title of Event: | 1st International Workshop on OpenCL (IWOCL 13) | ||||
| Type of Event: | Workshop | ||||
| Location of Event: | Atlanta, USA | ||||
| Date(s) of Event: | 13 - 14 May 2013 | ||||
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