Numerical Simulation Of Three Dimensional Underwater Acoustic Propagation On Modern High Performance Computing Platform

Since China has clearly set forth the ability in developing ocean,people have increased their attention to the oceans and the intensification of disputes over the surrounding islands.The importance of the study of marine environmental characteristics becomes more and more prominent.The sound in the ocean is the only carrier that can spread information effectively over long distances.It is important to know how the sound propagates in the water.However,considering the expansion of the sound field and frequency,the calculation of the sound field is huge and time-consuming,which stunts the progress of the real-time work.Data that is more accurate has a high value of practical application.Therefore,it is necessary to get three-dimensional data of sound.We should focus on the study that combines the parallel computing about underwater sound propagation and modern many-core processors.In this paper,FOR3 D,a typical code of the parabolic-equation method available,is tested.We have achieved a parallelization and optimization strategy on Xeon CPU and KNL(Knights Landing).The main achievements of this paper are as follows:We put forward parallelization and performance optimization that is combined with the architecture of processors and the computing characteristics of the application to decrease the time of a parabolic equation solver in computational ocean acoustics.We realize the optimization of the serial FOR3 D program on different high performance computers.Based on the serial optimization,we accomplish the parallel optimization of OpenMP.The results showed that the speed of computation could be improved by the strategy mentioned in this paper.Then we achieve the multi-process parallelization of the calculation in multi-frequency.Finally,we use Roofline model to apply objective analysis and evaluation of performance on KNL.