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• W3185689094 abstract "Abstract We present a GPU-accelerated cosmological simulation code, PhotoNs-GPU, based on an algorithm of Particle Mesh Fast Multipole Method (PM-FMM), and focus on the GPU utilization and optimization. A proper interpolated method for truncated gravity is introduced to speed up the special functions in kernels. We verify the GPU code in mixed precision and different levels of theinterpolated method on GPU. A run with single precision is roughly two times faster than double precision for current practical cosmological simulations. But it could induce an unbiased small noise in power spectrum. Compared with the CPU version of PhotoNs and Gadget-2, the efficiency of the new code is significantly improved. Activated all the optimizations on the memory access, kernel functions and concurrency management, the peak performance of our test runs achieves 48% of the theoretical speed and the average performance approaches to ∼35% on GPU." @default.
• W3185689094 created "2021-08-02" @default.
• W3185689094 creator A5005423786 @default.
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• W3185689094 date "2021-12-01" @default.
• W3185689094 modified "2023-10-16" @default.
• W3185689094 title "PhotoNs-GPU: A GPU accelerated cosmological simulation code" @default.
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• W3185689094 doi "https://doi.org/10.1088/1674-4527/21/11/281" @default.
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