Abstract: Sunway TaihuLight is a supercomputer independently developed by China.Its processor is SW26010 heterogeneous many-core processor,which is also independently developed by Chinese.Each processor includes four core-groups,and each core-group includes one management processing element(MPE) and 64 computing processing elements(CPEs).The function of NPB-FT program is to solve three-dimensional partial differential equations by using Fast Fourier Transform,and it is widely used in the evaluation of cluster computing and aggregation capabilities.Therefore,it is of great importance to use the FT program to analyze the multi-level parallel resources provided by Sunway TaihuLight and the performance of the architecture.First of all,the program is rewritten as master-slave version by accelerating athread library,so that the program core can be executed by the CPEs.Second,the data transposition process in the FT program is eliminated by using register communication of CPEs and the data transmission channel between the MPE and CPEs.Further,the computing and communication hiding are realized to avoid the computing resources in the core being in idle state while communicating between cores.Finally,the vectorization and instruction flow technology are used to enhance the program’s data-level and instruction-level parallelism.The experimental results show that the 3D-32 program executing on a single core has an acceleration ratio of 66.The acceleration ratio of 3D-512 program executing on 64 cores is 20 while the acceleration ratio of 3D-2048 program executing on 256 cores is 46.

Key words: Communication hiding, Fourier transform, Register communication, SW26010 processor