کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
425056 | 685675 | 2006 | 10 صفحه PDF | دانلود رایگان |
Two parallel programming models represented by OpenMP and MPI are compared for PDE solvers based on regular sparse numerical operators. As a typical representative of such an operator, a finite difference approximation of the Euler equations for fluid flow is considered.The comparison of programming models is made with regard to uniform memory access (UMA), non-uniform memory access (NUMA), and self-optimizing NUMA (NUMA-opt) computer architectures. By NUMA-opt, we mean NUMA systems extended with self-optimization algorithms, in order to reduce the non-uniformity of the memory access time.The main conclusions of the study are: (1) that OpenMP is a viable alternative to MPI on UMA and NUMA-opt architectures; (2) that OpenMP is not competitive on NUMA platforms, unless special care is taken to get an initial data placement that matches the algorithm; (3) that for OpenMP to be competitive in the NUMA-opt case, it is not necessary to extend the OpenMP model with additional data distribution directives, nor to include user-level access to the page migration library.
Journal: Future Generation Computer Systems - Volume 22, Issues 1–2, January 2006, Pages 194–203