基于Intel Xeon Phi的激光等离子体粒子模拟研究

激光等离子体粒子模拟广泛用于探索极端物质状态下的科学问题。将一种基于粒子云网格方法的三维等离子体粒子模拟程序LARED P移植到Intel Xeon Phi协处理器上。在移植的过程中，综合运用了Native和Offload两种编程模式：首先运用Native模式对LARED P程序中热点计算任务进行优化研究，通过采用SIMD扩展指令使该计算任务获得了4.61倍的加速；然后运用Offload模式将程序移植到CPU-Intel Xeon Phi异构系统上，并通过使用异步数据传输和双缓冲技术分别提升了程序性能9.8%和21.8%。

Research of LARED-P on Intel Xeon Phi

Plasma simulations have been widely used to exploit scientific problems under extremely situations. The paper ports a particle in cell based plasma code, LARED P, to Intel Xeon Phi co processor. In order to accomplish this, two modes are employed, i.e. the Native mode and the Offload mode. Firstly, the Native mode is employed to study on the hot computing tasks, which have been accelerated to 4.61 times faster by using SIMD extension instructions. Secondly, the Offload mode is employed to transplant the whole code onto a CPU Intel Xeon Phi heterogeneous system. We also adopt optimizations such as asynchronous data transferring and double buffer technique to improve the performance. And we obtain 9.8% and 21.8% improvement respectively.