Geophysics and Geophysical Exploration (지구물리와물리탐사)

Korean Society of Earth and Exploration Geophysicists (한국지구물리·물리탐사학회)
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Three-dimensional Wave Propagation Modeling using OpenACC and GPU

OpenACC와 GPU를 이용한 3차원 파동 전파 모델링

  • Kim, Ahreum (Department of Energy Resources Engineering, Pukyong National University) ;
  • Lee, Jongwoo (Department of Energy Resources Engineering, Pukyong National University) ;
  • Ha, Wansoo (Department of Energy Resources Engineering, Pukyong National University)
  • 김아름 (부경대학교 에너지자원공학과) ;
  • 이종우 (부경대학교 에너지자원공학과) ;
  • 하완수 (부경대학교 에너지자원공학과)
  • Received : 2017.02.20
  • Accepted : 2017.04.17
  • Published : 2017.05.31

Abstract

We calculated 3D frequency- and Laplace-domain wavefields using time-domain modeling and Fourier transform or Laplace transform. We adopted OpenACC and GPU for an efficient parallel calculation. The OpenACC makes it easy to use GPU accelerators by adding directives in conventional C, C++, and Fortran programming languages. Accordingly, one doesn't have to learn new GPGPU programming languages such as CUDA or OpenCL to use GPU. An OpenACC program allocates GPU memory, transfers data between the host CPU and GPU devices and performs GPU operations automatically or following user-defined directives. We compared performance of 3D wave propagation modeling programs using OpenACC and GPU to that using single-core CPU through numerical tests. Results using a homogeneous model and the SEG/EAGE salt model show that the OpenACC programs are approximately 53 and 30 times faster than those using single-core CPU.

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Acknowledgement

Grant : 유가스 부존특성 및 해저천부구조 정밀 규명을 위한 융복합 탐사기술 개발

Supported by : 한국지질자원연구원, 부산과학기술기획평가원

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