Geoscientific Model Development
Geoscientific Model Development
GMD
Articles | Volume 16, issue 19
Articles | Volume 16, issue 19
https://doi.org/10.5194/gmd-16-5539-2023
© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/gmd-16-5539-2023
© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 16, issue 19
Development and technical paper
 | 
05 Oct 2023
Development and technical paper |  | 05 Oct 2023

Comparing the Performance of Julia on CPUs versus GPUs and Julia-MPI versus Fortran-MPI: a case study with MPAS-Ocean (Version 7.1)

Siddhartha Bishnu, Robert R. Strauss, and Mark R. Petersen

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Short summary
Here we test Julia, a relatively new programming language, which is designed to be simple to write, but also fast on advanced computer architectures. We found that Julia is both convenient and fast, but there is no free lunch. Our first attempt to develop an ocean model in Julia was relatively easy, but the code was slow. After several months of further development, we created a Julia code that is as fast on supercomputers as a Fortran ocean model.
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