A hybrid MPI/OpenMP parallelization method for a quantum drift-diffusion model
Shohiro Sho, S. Odanaka · 2017
In this paper, we describe parallel domain decomposition methods based on the restricted additive Schwarz (RAS) method for a quantum drift-diffusion (QDD) model in semiconductors. We have developed a hybrid MPI/OpenMP parallelization method of the QDD system. For the inter-node parallelization, an extension of the RAS method is newly developed for the QDD model. For the intra-node parallelization, we combine a splitting-up operator method with the BiCGSTAB (SPBiCGSTAB) procedure to realize parallelization of the incomplete factorization. The parallel numerical results for three-dimensional Si bulk n-MOSFET on a multi-core parallel computer: NEC SX-ACE are demonstrated. The intra-node parallel numerical results are further evaluated on a many-core parallel computer: Cray XC40.