全球涡分辨率并行海洋模式POP在神威蓝光上的移植和应用  

PORTING AND APPLICATION OF GLOBAL EDDY-RESOLVING PARALLEL OCEAN MODE POP TO SW SUPERCOMPUTER

作　　者：赵伟[1] 雷晓燕[1] 陈德训[2] 赵春[2] 宋振亚[1] 

机构地区：[1]国家海洋局第一海洋研究所,山东青岛266061 [2]江南计算技术研究所,江苏无锡214083

出　　处：《计算机应用与软件》2014年第5期42-45,共4页Computer Applications and Software

基　　金：国家高技术研究发展计划项目(2101AA012403);中央级公益性科研院所基本科研业务费专项资金项目(GY02-2010G22)

摘　　要：基于中国自行研制的超大规模并行计算机神威蓝光平台,对海洋环流模式POP进行移植和进一步优化,并进行模式和机器的并行测试。测试结果表明:0.1度分辨率在5 000核以内达到了线性加速比,随着使用线程数目的增多,虽然加速比依然增加,但是加速效率在降低,当线程数目达到24 000的时候加速比出现降低,加速效率只有12.6%;0.05度分辨率可在12 000核以内达到了线性加速比,同样随着线程数目的增多加速在增多但加速效率在降低,当线程数目达到32 000的时候加速比出现降低,加速效率只有25.7%。经过优化后的海洋环流模式POP在神威蓝光并行计算机系统上具有良好的兼容性,并行效率较高,而且具有很强的可扩展性,可用来开展超大规模的并行计算。对测试结果的进一步分析发现,发展并行性良好的线性方程组求解方案、快速高效的计算网络协议等问题是未来发展高分辨率模式中需解决的问题。SW supercomputer,which is a super large scale parallel computer developed solely by China,is ported for ocean circulation mode POP and further optimized. In addition,mode and machine parallel testing is carried out. Test result show s： 0. 1 degree resolution reaches linear speedup ratio within 5 000 cores. As the number of threads in use increases,speedup ratio still increases but speedup efficiency decreases. When thread number reaches 24 000,speedup ratio starts to decrease while speedup efficiency remains only 12. 6%. 0. 05 degree resolution reaches linear speedup ratio within 12 000 cores. Similarly as the number of threads increases,speedup increases but speedup efficiency decreases. When thread number reaches 32 000,speedup ratio starts to decrease while speedup efficiency remains only 25. 7%. The optimized ocean circulation mode POP bears fine compatibility on SW supercomputer,higher penalization efficiency and strong expandability,so that it can be applied to very large scale parallel computing. Further analysis on the test result discovers that it is the demanding question in future high-resolution mode development to develop well-parallelized linear equation group resolving solution,quick and efficient computing network protocol as well as other questions.

关 键 词：神威蓝光 海洋环流模式 加速比 

分 类 号：TP319[自动化与计算机技术—计算机软件与理论]