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Distributed-Memory Parallelization of an Explicit Time-Domain Volume Integral Equation Solver on Blue Gene/P

机译:蓝色基因/ P上的显式时域体积积分方程求解器的分布式内存并行化

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摘要

Two distributed-memory schemes for efficiently parallelizing the explicit marching-on-in-time based solution of the time domain volume integral equation on the IBM Blue Gene/P platform are presented. In the first scheme, each processor stores the time history of all source fields and only the computationally dominant step of the tested field computations is distributed among processors. This scheme requires all-to-all global communications to update the time history of the source fields from the tested fields. In the second scheme, the source fields as well as all steps of the tested field computations are distributed among processors. This scheme requires sequential global communications to update the time history of the distributed source fields from the tested fields. Numerical results demonstrate that both schemes scale well on the IBM Blue Gene/P platform and the memory-efficient second scheme allows for the characterization of transient wave interactions on composite structures discretized using three million spatial elements without an acceleration algorithm.
机译:提出了两种分布式内存方案,用于在IBM Blue Gene / P平台上有效地并行化基于时域体积分方程的显式实时行进解。在第一种方案中,每个处理器存储所有源字段的时间历史记录,并且仅在处理器之间分配测试字段计算的计算优势步骤。该方案需要所有全局通信,以更新测试字段中源字段的时间历史记录。在第二种方案中,源字段以及测试字段计算的所有步骤都分布在处理器之间。该方案需要顺序的全局通信以从测试的字段更新分布式源字段的时间历史。数值结果表明,这两种方案都可以在IBM Blue Gene / P平台上很好地扩展,并且内存有效的第二种方案可以表征使用300万个空间元素离散化的复合结构上的瞬态波相互作用,而无需使用加速算法。

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