MPtostream:an OpenMP compiler for CPU-GPU heterogeneous parallel systems  

作　　者：YANG XueJun TANG Tao WANG GuiBin JIA Jia XU XinHai 

机构地区：[1]National Laboratory for Parallel and Distributed Processing,National University of Defense Technology,Changsha 410073,China

出　　处：《Science China(Information Sciences)》2012年第9期1961-1971,共11页中国科学（信息科学）（英文版）

基　　金：supported by National Natural Science Foundation of China (Grant No. 60921062)

摘　　要：In light of GPUs＇ powerful floating-point operation capacity, heterogeneous parallel systems incorporating general purpose CPUs and GPUs have become a highlight in the research field of high performance computing（HPC）. However, due to the complexity of programming on GPUs, porting a large number of existing scientific computing applications to the heterogeneous parallel systems remains a big challenge. The OpenMP programming interface is widely adopted on nmlti-core CPUs in the field of scientific computing. To effectively inherit existing OpenMP applications and reduce the transplant cost, we extend OpenMP with a group of compiler directives, which explicitly divide tasks among the CPU and the GPU, and map time-consuming com- puting fragments to run on the GPU, thus dramatically simplifying the transplantation. We have designed and implemented MPtoStream, a compiler of the extended OpenMP for AMD＇s stream processing GPUs. Our exper- imental results show that programming with the extended directives deviates from programming with OpenMP by less than 11% modification and achieves significant speedup ranging from 3.1 to 17.3 on a heterogeneous system, incorporating an Intel Xeon E5405 CPU and an AMD FireStream 9250 GPU, over the execution on the Xeon CPU alone.In light of GPUs＇ powerful floating-point operation capacity, heterogeneous parallel systems incorporating general purpose CPUs and GPUs have become a highlight in the research field of high performance computing（HPC）. However, due to the complexity of programming on GPUs, porting a large number of existing scientific computing applications to the heterogeneous parallel systems remains a big challenge. The OpenMP programming interface is widely adopted on nmlti-core CPUs in the field of scientific computing. To effectively inherit existing OpenMP applications and reduce the transplant cost, we extend OpenMP with a group of compiler directives, which explicitly divide tasks among the CPU and the GPU, and map time-consuming com- puting fragments to run on the GPU, thus dramatically simplifying the transplantation. We have designed and implemented MPtoStream, a compiler of the extended OpenMP for AMD＇s stream processing GPUs. Our exper- imental results show that programming with the extended directives deviates from programming with OpenMP by less than 11% modification and achieves significant speedup ranging from 3.1 to 17.3 on a heterogeneous system, incorporating an Intel Xeon E5405 CPU and an AMD FireStream 9250 GPU, over the execution on the Xeon CPU alone.

关 键 词：GPGPU STREAM OPENMP COMPILER 

分 类 号：TP393[自动化与计算机技术—计算机应用技术] P456.7[自动化与计算机技术—计算机科学与技术]