We present performance results of a mixed-precision strategy developed to improve a recently developed massively parallel GPU-accelerated tool for fast and scalable simulation of unsteady fully nonlinear free surface water waves over uneven depths (Engsig-Karup et.al. 2011). The underlying wave model is based on a potential flow formulation, which requires efficient solution of a Laplace problem at large-scales. We report recent results on a new mixed-precision strategy for efficient iterative high-order accurate and scalable solution of the Laplace problem using a multigrid-preconditioned defect correction method. The improved strategy improves the performance by exploiting architectural features of modern GPUs for mixed precision computations and is tested in a recently developed generic library for fast prototyping of PDE solvers. The new wave tool is applicable to solve and analyze large-scale wave problems in coastal and offshore engineering.
|Title of host publication||Proceedings of ENUMATH 2011|
|Number of pages||8|
|Publisher||University of Leicester|
|Publication status||Published - 2011|
|Event||ENUMATH 2012: The European Numerical Mathematics and Advanced Applications Conference - Leicester, United Kingdom|
Duration: 5 Sept 2012 → 9 Sept 2012
|Period||05/09/2012 → 09/09/2012|