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arXiv 1402.4247cs.DC
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用CUDA进行简单杂化化对数值原子轨道密度泛函理论计算的影响

Effects of Easy Hybrid Parallelization with CUDA for Numerical-Atomic-Orbital Density Functional Theory Calculation

Jae-Hyeon Parq, Erik Sevre, Sang-Mook Lee

摘要:

我们修改了MPI友好的密度泛函理论(DFT)的混合并行化,包括CUDA的源代码。我们的目标是找出如何简单的转换内的混合并行与中档GPU影响DFT代码原本不适合CUDA。我们确定了数原子轨道DFT代码混合并行化的几个规则。测试在具有OpenMX代码的磁铁矿材料系统上通过使用包含2个Xeon E5606 CPU和2个Quadro 4000 GPU的硬件系统进行。3-单向混合例程的加速比为7.55,而双向混合例程的加速比为10.94。带有CUDA的GPU补充了OpenMP的效率,并补偿了MPI中CPU的过度竞争。

英文摘要:

We modified a MPI-friendly density functional theory (DFT) source code within hybrid parallelization including CUDA. Our objective is to find out how simple conversions within the hybrid parallelization with mid-range GPUs affect DFT code not originally suitable to CUDA. We settled several rules of hybrid parallelization for numerical-atomic-orbital (NAO) DFT codes. The test was performed on a magnetite material system with OpenMX code by utilizing a hardware system containing 2 Xeon E5606 CPUs and 2 Quadro 4000 GPUs. 3-way hybrid routines obtained a speedup of 7.55 while 2-way hybrid speedup by 10.94. GPUs with CUDA complement the efficiency of OpenMP and compensate CPUs' excessive competition within MPI.

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