An OpenCL Approach of Prestack Kirchhoff Time Migration Algorithm on General Purpose GPU

OpenCL is an open standard for portable, parallel programming across heterogeneous platforms. In this paper, we presented how to implement and optimize Prestack Kirchhoff Time Migration algorithm, which is one of the most widely adopted imaging methods for seismic data processing, on OpenCL and GPGPU. We introduced how to port the original CUDA program to OpenCL, and how to optimize the OpenCL program to get the competitive performance comparing with the original CUDA version. Our OpenCL version of Kirchhoff Migration algorithm on NVidia 8800GT is 8.9 times faster than its original CPU version on AMD245 2.9HGZ, and almost as fast as its CUDA version.

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