关键词: 三维声弹性, 神威太湖之光, 多级异构并行

Abstract: The three-dimensional sono-elasticity theory and the corresponding numerical methods lay the foundation for fluid-solid-acoustic coupling and sound propagation of the elastic floating structures in the ocean, which has a very important influence on the study of marine elastic floating body structures. According to the calculating density characteristics of multiple computational stages of three-dimensional acoustic-elasticity, the multi-level parallelism and optimization of three-dimensional acoustic elastic software (THAFTS-Acoustic) are completed based on Sunway TaihuLight system. The optimization methods include loop collapse, loop tile, direct memory access (DMA), over hiding of communication and computation, SIMD (single instruction multiple data) based on the SW26010 processor. The test results show that the multi-level heterogeneous parallel method for the three-dimensional sono-elasticity has better MPI expansion performance and multi-core parallel acceleration effect. The kernels can be speeded up to 18 times, and the 64-process running time of the program is 5.5 times faster than the original program, which can   effectively play the powerful computing capability of the Sunway TaihuLight system and further enable the ultra-large scale and higher precision parallel computing of THAFTS-Acoustic.

Key words: three-dimensional acoustic elasticity, Sunway TaihuLight, multi-level heterogeneous parallel