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Erschienen in:
2013 | OriginalPaper | Buchkapitel
Array-Based Reduction Operations for a Parallel Adaptive FEM
verfasst von : Martina Balg, Jens Lang, Arnd Meyer, Gudula Rünger
Erschienen in: Facing the Multicore-Challenge III
Verlag: Springer Berlin Heidelberg
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For many applications of scientific computing, reduction operations may cause a performance bottleneck. In this article, the performance of different coarse- and fine-grained methods for implementing the reduction is investigated. Fine-grained reductions using atomic operations or fine-grained explicit locks are compared to the coarse-grained reduction operations supplied by OpenMP and MPI.
The reduction operations investigated are used for an adaptive FEM. The performance results show that applications can gain a speedup by using fine-grained reduction since this implementation enables to hide the reduction between calculation while minimising the time waiting for synchronisation.