OpenACC와 GPU를 이용한 3차원 파동 전파 모델링

Abstract

In this study, we parallelized three-dimensional wave propagation modeling in time-frequency domain and time-laplace domain using OpenACC and GPU for effective calculation. The three-dimensional wave propagation modeling in time-frequency domain and time-laplace domain makes respectively a wavefield in frequency and laplace domain and it calculates wave propagation modeling in time domain through fourier transform and laplace transform at the same time. Therefore, It saves executive time and solves memory problem. The OpenACC used in the study has feature that is easy to use simply by adding directives in C,C++ and Fortran programming languages. So, It doesn’t have to learn new programming languages like a CUDA or an OpenCL. The OpenACC allocates GPU memory space, copies data between CPU and GPU and operates depending on automatic or customization. The three-dimensional EAGE/SEG Salt modeling program using OpenACC and GPU is 53 times and 30 times faster than single CPU core in time-frequency domain and time-laplace domain respectively.