Fortran interface layer of the framework for developing particle simulator FDPS
| Autor: | Long Wang, Daisuke Namekata, Natsuki Hosono, Junichiro Makino, Ataru Tanikawa, Kentaro Nomura, Takayuki Muranushi, Masaki Iwasawa, Keigo Nitadori |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
FOS: Computer and information sciences
Fortran Interface (Java) Interoperability Overhead (engineering) FOS: Physical sciences 02 engineering and technology computer.software_genre 01 natural sciences Data type Field (computer science) methods: numerical Computational Engineering Finance and Science (cs.CE) 0103 physical sciences 0202 electrical engineering electronic engineering information engineering planets and satellites: formation Computer Science - Computational Engineering Finance and Science Instrumentation and Methods for Astrophysics (astro-ph.IM) 010303 astronomy & astrophysics Massively parallel computer.programming_language Earth and Planetary Astrophysics (astro-ph.EP) Physics 020203 distributed computing Programming language Astronomy and Astrophysics Computational Physics (physics.comp-ph) Python (programming language) (cosmology:) dark matter Space and Planetary Science Astrophysics - Instrumentation and Methods for Astrophysics galaxies: evolution Physics - Computational Physics computer Astrophysics - Earth and Planetary Astrophysics |
| Zdroj: | Publications of the Astronomical Society of Japan. 70(4):70-70 |
| ISSN: | 0004-6264 |
| Popis: | Numerical simulations based on particle methods have been widely used in various fields including astrophysics. To date, simulation softwares have been developed by individual researchers or research groups in each field, with a huge amount of time and effort, even though numerical algorithms used are very similar. To improve the situation, we have developed a framework, called FDPS, which enables researchers to easily develop massively parallel particle simulation codes for arbitrary particle methods. Until version 3.0, FDPS have provided API only for C++ programing language. This limitation comes from the fact that FDPS is developed using the template feature in C++, which is essential to support arbitrary data types of particle. However, there are many researchers who use Fortran to develop their codes. Thus, the previous versions of FDPS require such people to invest much time to learn C++. This is inefficient. To cope with this problem, we newly developed a Fortran interface layer in FDPS, which provides API for Fortran. In order to support arbitrary data types of particle in Fortran, we design the Fortran interface layer as follows. Based on a given derived data type in Fortran representing particle, a Python script provided by us automatically generates a library that manipulates the C++ core part of FDPS. This library is seen as a Fortran module providing API of FDPS from the Fortran side and uses C programs internally to interoperate Fortran with C++. In this way, we have overcome several technical issues when emulating `template' in Fortran. By using the Fortran interface, users can develop all parts of their codes in Fortran. We show that the overhead of the Fortran interface part is sufficiently small and a code written in Fortran shows a performance practically identical to the one written in C++. Comment: 10 pages, 10 figures; accepted for publication in PASJ; a typo in author name is corrected |
| Databáze: | OpenAIRE |
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