Journal
INTERNATIONAL JOURNAL OF COMPUTATIONAL FLUID DYNAMICS
Volume 33, Issue 10, Pages 393-406Publisher
TAYLOR & FRANCIS LTD
DOI: 10.1080/10618562.2019.1683167
Keywords
OpenACC; MPI; GPU; magnetohydrodynamics (MHD)
Categories
Funding
- Special Project on High-performance Computing under the National Key R&D Program of China [2016YFB0200603]
- National Natural Science Foundation of China [11775188, 11835010]
- Fundamental Research Fund for Chinese Central Universities
- Beijing Natural Science Foundation [8184094]
- IWHR Research & Development Support Program [JZ0145B022018]
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In this paper, the OpenACC heterogeneous parallel programming model is successfully applied to modification and acceleration of the three-dimensional Tokamak magnetohydrodynamical code (CLT). Through combination of OpenACC and MPI technologies, CLT is further parallelised by using multiple-GPUs. Significant speedup ratios are achieved on NVIDIA TITAN Xp and TITAN V GPUs, respectively, with very few modifications of CLT. Furthermore, the validity of the double precision calculations on the above-mentioned two graphics cards has also been strictly verified with m/n = 2/1 resistive tearing mode instability in Tokamak.
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