3-DIMENSIONAL MONTE-CARLO DEVICE SIMULATION WITH PARALLEL MULTIGRID SOLVER

We present the results in embedding a multigrid solver for Poisson's e quation into the parallel 3D Monte Carlo device simulator, PMC-3D. Fir st we have implemented the sequential multigrid solver, and embedded i t into the Monte Carlo code which previously was using the sequential successive overrelaxation (SOR) solver. Depending on the convergence t hreshold, we have obtained significant speedups ranging from 5 to 15 o n a single HP 712/80 workstation. We have also implemented the paralle l multigrid solver by extending the partitioning algorithm and the int erprocessor communication routines of the SOR server in order to servi ce multiple grids. The Monte Carlo code with the parallel multigrid Po isson solver is 3 to 9 times faster than the Monte Carlo code with the parallel SOR code, based on timing results on a 32-node nCUBE multipr ocessor.