Study on Parallel Algorithm for MPI-based LAGFD-WAM Numerical Wave Model
Yang Yongzeng · Haiyang kexue jinzhan · 2007
Based on the serial program of the LAGFD-WAM numerical wave model,the parallel computation of the numerical wave model was implemented by using message passing interface(MPI).The computation loads at different computational nodes are balanced by making reasonable partition of simulated region and partitioned loading of data.The coarse granularity computation is made by improving the algorithm so as to greatly reduce the traffic and to raise the programme execution efficiency.It is shown from the comparison between the serial and parallel computation efficiencies that the parallel algorithm can achieve a higher acceleration rate.For a grobal wave model,the acceleration rate shows a largely linear relation with the number of CPU,and for a regional wave model of high resolution,the acceleration rate by using parallel algorithm and 128 CPUs can be as high as 91.9.