OpenFOAM*与MPI-3 RMA例程在Intel®Xeon®处理器和Intel®Xeon Phi™协处理器上的性能评估

Proceedings of the 22nd European MPI Users' Group Meeting Pub Date : 2015-09-21 DOI:10.1145/2802658.2802676

Nishant Agrawal, Paul Edwards, Ambuj Pandey, Michael Klemm, Ravi Ojha, R. A. Razak

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引用次数: 1

摘要

OpenFOAM是一个用于求解偏微分方程的软件包，在汽车领域的计算流体动力学中非常流行。在这项工作中，我们描述了我们在Intel®Xeon Phi协处理器上使用MPI-3远程内存访问(RMA)单侧通信对OpenFOAM性能的评估。目前，OpenFOAM是在不同MPI等级之间分解的网格上进行计算的，它需要在相邻等级之间进行大量的通信。MPI-3通过一个新的API提供RMA，该API将通信和同步分离。与OpenFOAM中当前的双边异步通信例程相比，其目的是通过MPI-3 RMA例程实现更好的性能。我们还展示了为了促进OpenFOAM中不同的MPI-3 RMA例程所克服的挑战。本讨论旨在分析OpenFOAM中MPI-3 RMA的潜力，并对处理器和协处理器的性能进行基准测试。我们的工作还表明，OpenFOAM中的MPI-3 RMA可以在由Intel®Xeon®E5-2697v3处理器和Intel®Xeon Phi™7120P协处理器组成的对称模式下运行。

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Performance Evaluation of OpenFOAM* with MPI-3 RMA Routines on Intel® Xeon® Processors and Intel® Xeon Phi™ Coprocessors

OpenFOAM is a software package for solving partial differential equations and is very popular for computational fluid dynamics in the automotive segment. In this work, we describe our evaluation of the performance of OpenFOAM with MPI-3 Remote Memory Access (RMA) one-sided communication on the Intel® Xeon Phi" coprocessor. Currently, OpenFOAM computes on a mesh that is decomposed among different MPI ranks, and it requires a high amount of communication between the neighboring ranks. MPI-3 offers RMA through a new API that decouples communication and synchronization. The aim is to achieve better performance with MPI-3 RMA routines as compared to the current two-sided asynchronous communication routines in OpenFOAM. We also showcase the challenges overcome in order to facilitate the different MPI-3 RMA routines in OpenFOAM. This discussion aims at analyzing the potential of MPI-3 RMA in OpenFOAM and benchmarking the performance on both the processor and the coprocessor. Our work also demonstrates that MPI-3 RMA in OpenFOAM can run in symmetric mode consisting of the Intel® Xeon® E5-2697v3 processor and the Intel® Xeon Phi™ 7120P coprocessor.

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Proceedings of the 22nd European MPI Users' Group Meeting

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