SEG Technical Program Expanded Abstracts 2014 2014
DOI: 10.1190/segam2014-0537.1
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Wave equation based stencil optimizations on multi-core CPU

Abstract: Wave propagation stencil kernels are engines of seismic imaging algorithms. These kernels are both compute-and memory-intensive. This work targets improving the performance of wave equation based stencil code parallelized by OpenMP on a multi-core CPU. To achieve this goal, we explored two techniques: improving vectorization by using hardware SIMD technology, and reducing memory tra c to mitigate the bottleneck caused by limited memory bandwidth. We show that with loop interchange, memory alignment, and compil… Show more

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