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This paper discusses the performance model for practical computational fluid dynamics (CFD) simulation. Based on the analysis of the conventional qualitative model and empirical knowledge in the simulation, a set of practical models for the linear solution in high-order finite element method (FEM) simulation are established: a linear function model for the storage consumption, and a power function...
In this paper, an improved changing-topology moving mesh method is developed in OpenFOAM (a widely used CFD software) to solve the moving boundary problem. We use mesh smoothing and edge swapping to improve the mesh quality, together with edge bisection and edge contraction to control the mesh resolution. In order to increase the mesh motion efficiency, a local refinement algorithm is realized. In...
OpenFOAM is a widely used opensource CFD application. Based on mesh partitioned, applications can run in parallel to achieve better performance in OpenFOAM. When mesh generated from the liquid field is large, performance of partitioning algorithms will heavily affect the execution efficiency of the whole application. In this paper, we investigate the four partitioning algorithms implemented in OpenFOAM-Simple,...
Performance prediction for the high performance computer system is of great importance for designing, implementing, and optimizing system. As a widely used technique for predicting performance, simulation method attracts more and more attention from the research community. Based on analyzing the problems in the current performance simulation techniques, we present a key idea of the performance simulator...
With fast development of transistor technology, Graphic Processing Unit(GPU) is increasingly used in the non-graphics applications, and major GPU hardware vendors have introduced software stacks for their own GPUs, such as Brook+ for AMD GPU. Compared with the traditional parallel systems, heterogeneous systems integerating stream-based multi-threaded GPUs provide higher parallel computing capabilities...
Strip-mining is a critical optimization for improving the effectiveness of memory hierarchy of Imagine. In this paper, we present an efficient compiler algorithm for selecting the optimal strip size to minimize the execution time of stream programs. First, we build a graceful analytical model that characterizes the effect of strip size on key performance factors. Then, we design a novel algorithm...
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