基于Intel至强众核加速积分法叠前时间偏移技术的实现  

The implementation of MIC usage in accelerating Kirchhoff prestack time migration

作　　者：陈维 

机构地区：[1]东方地球物理公司油藏地球物理研究中心,涿州072751

出　　处：《物探化探计算技术》2016年第6期815-820,共6页Computing Techniques For Geophysical and Geochemical Exploration

基　　金：国家科技重大专项(2011ZX05019-006)

摘　　要：为进一步提升积分法叠前时间偏移(PSTM)程序的运行效率,利用Intel至强众核(MIC)技术,将该程序移植到至强众核平台上,以实现对该程序的加速。GeoEast系统下的PSTM模块CPU版本采用MPI+PThread多线程方式实现程序运行的并行计算。在CPU+MIC协同计算方式下,继承上述的并行方式,同时,成像空间数据在节点间和节点内的CPU和MIC之间采用交替分割方式,并优化CPU与MIC之间的数据异步流水线式传输。通过CPU+MIC协同计算优化,PSTM模块运行效率相比CPU版本提升3.8倍,取得了预期的效果,也验证了CPU+MIC协同计算加速PSTM的可行性。In order to improve Kirchhoff pre-stack time migration process efficiency,the program is ported onto Intel Xeon multiple integrated core（MIC）platform.The PSTM in GeoEast system uses MPI＋Pthread method in parallel processing.In CPU＋MIC cooperative computing,in addition to MPI＋PThread,the migration imaging data are put on each node by turn,and also on CPU and MIC by turn.In addition,using asynchronous data transfer between CPU and MIC.Through the CPU＋MIC cooperative computing optimization,compared with CPU version,the MIC version of PSTM got the 3.8times shorter computing time.

关 键 词：叠前时间偏移 众核 卸载 移植 多线程 

分 类 号：P631.4[天文地球—地质矿产勘探]