Articles | Volume 8, issue 9
Geosci. Model Dev., 8, 2815–2827, 2015
https://doi.org/10.5194/gmd-8-2815-2015
Geosci. Model Dev., 8, 2815–2827, 2015
https://doi.org/10.5194/gmd-8-2815-2015

Development and technical paper 09 Sep 2015

Development and technical paper | 09 Sep 2015

POM.gpu-v1.0: a GPU-based Princeton Ocean Model

S. Xu et al.

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In this paper, we redesign the mpiPOM with GPUs. Specifically, we first convert the model from its original Fortran form to a new CUDA-C version, POM.gpu-v1.0. Then we optimize the code on each of the GPUs, the communications between the GPUs, and the I/O between the GPUs and the CPUs. We show that the performance of the new model on a workstation containing 4 GPUs is comparable to that on a powerful cluster with 408 standard CPU cores, and it reduces the energy consumption by a factor of 6.8.