An efficient parallel algorithm for ocean circulation numerical model based on irregular rectangle d

• 作 者: ZHUANG Zhanpeng YUAN Yeli ZHANG Jie HAN Lei YANG Jungang
• 机 构: College of Physical and Environmental Oceanography,Ocean University of China,The First Institute of
• 出 处: Acta Oceanologica Sinica
• 发表日期: 2016年05期
• 关键词: irregular rectangle decomposition scheme message passing interface (MPI) neighbo

A parallel algorithm of circulation numerical model based on message passing interface(MPI) is developed using serialization and an irregular rectangle decomposition scheme. Neighboring point exchange strategy(NPES) is adopted to further enhance the computational efficiency. Two experiments are conducted on HP C7000 Blade System, the numerical results show that the parallel version with NPES(PVN) produces higher efficiency than the original parallel version(PV). The PVN achieves parallel efficiency in excess of 0.9 in the second experiment when the number of processors increases to 100, while the efficiency of PV decreases to 0.39 rapidly. The PVN of ocean circulation model is used in a fine-resolution regional simulation, which produces better results. The capability of universal implementation of this algorithm makes it applicable in many other ocean models potentially.

Neighboring point exchange strategy (NPES) is adopted to further enhance the computational efficiency. Two experiments are conducted on HP C7000 Blade System, the numerical results show that the parallel version with NPES (PVN) produces higher efficiency than the original parallel version (PV). The PVN achieves parallel efficiency in excess of 0.9 in the second experiment when the number of processors increases to 100, while the capability of universal reduction of 0.39 rapidly. The PVN of ocean circulation model is used in a fine-resolution regional simulation, which produces better results. The capability of universal implementation of this algorithm makes it applicable in many other ocean models potentially.