Running Models on Parallel Machines with Shared Memory

Abstract

Parallel computers with shared memory are rather popular. The main reason for this popularity is the fact that it is relatively easy to achieve high speeds of computations when such computers are used. Furthermore, and this is in many cases even more important, good performance could often be achieved with minimal efforts. Therefore one should consider the possibility of running large air pollution codes on parallel machines with shared memory. It must be emphasized here that many compan es that originally produced single vector processors are now producing parallel computers with shared memory. CRAY is a typical representative of this group of computer companies.