Argonne National Laboratory

The Model Coupling Toolkit: A New Fortran90 Toolkit for Building Multiphysics Parallel Coupled Models

TitleThe Model Coupling Toolkit: A New Fortran90 Toolkit for Building Multiphysics Parallel Coupled Models
Publication TypeReport
Year of Publication2004
AuthorsLarson, JW, Jacob, RL, Ong, ET
Series TitleInter. J. High Perform. Comput. Appl.
Pagination277-292
Date Published12/2004
Other NumbersANL/MCS-P1208-1204
Abstract

Many problems in science and engineering are best simulated as a set of mutually interacting models, resulting in a coupled or multiphysics model. These models present challenges stemming from their interdisciplinary nature and from their computational and algorithmic complexities. The computational complexity of individual models, combined with the popularity of the distributed-memory parallel programming model used on commodity microprocessor-based clusters, results in a parallel coupling problem when building a coupled model. We define and elucidate this problem and how it results in a set of requirements for software capable of simplifying the construction of parallel coupled models. We describe the package we developed---the Model Coupling Toolkit (MCT)---to meet these general requirements and the specific requirements of a parallel climate model. We present the MCT programming model with illustrative code examples. We present representative results that measure MCT\'s scalability, performance portability, and a proxy for coupling overhead.

PDFhttp://www.mcs.anl.gov/papers/P1208.pdf