LibEMM: A fictious wave domain 3D CSEM modelling library bridging sequential and parallel GPU implementation

Abstract

This paper delivers a software - libEMM - for 3D controlled-source electromagnetics (CSEM) modelling in fictitious wave domain, based on the newly developed high-order finite-difference time-domain (FDTD) method on non-uniform grid. The numerical simulation can be carried out over a number of parallel processors using MPI-based high performance computing architecture. The FDTD kernel coded in C has been parallelized with OpenMP for speedup using local shared memory. In addition, the software features a GPU implementation of the same algorithm based on CUDA programming language, which can be cross-validated and compared in terms of efficiency. A perspective of libEMM on the horizon is its application to 3D CSEM inversion in land and marine environment. Program summaryProgram Title: libEMMCPC Library link to program files:https://doi.org/10.17632/p769t7c5bk.1Developer's repository link:https://github.com/yangpl/libEMMLicensing provisions: GNU General Public License v3.0Programming language: C, CUDA, Fortran, ShellExternal dependencies: MPI [1], FFTW [2], CUDA [3]Nature of problem: Controlled-source electromagnetics (CSEM)Solution method: High-order finite-difference time-domain (FDTD) on non-uniform grid by fictious wave domain transformation References[1]https://www.mpich.org/[2]http://fftw.org/[3]https://developer.nvidia.com/cuda-toolkit