Automatic code generation for a turbulence scheme

Authors:
Paul van der Mark;Gerard Cats;Lex Wolters
Affiliations:
Leiden Institute of Advanced, Computer Science, Leiden University, P.O. Box 9512, 2300 RA Leiden, The Netherlands;Royal Netherlands, Meteorological Institute, P.O. Box 201, 3730 AE De Bilt, The Netherlands;Leiden Institute of Advanced, Computer Science, Leiden University, P.O. Box 9512, 2300 RA Leiden, The Netherlands
Venue:
ICS '01 Proceedings of the 15th international conference on Supercomputing
Year:
2001

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Abstract

In this paper we describe how to extend CTADEL, a Problem Solving Environment, in order to generate code for a turbulence scheme, in our case, within a numerical weather prediction model (NWP). Common for these schemes is the presence of implicit equations. We describe how to generate efficient codes for a particular class of implicit differential equations, that is encountered in the turbulence scheme of the HIRLAM NWP model. This extension to CTADEL enables the code generation for a particular solution method for these implicit equations. This solution method is also used in the original hand-written (reference) code. We address problems like how to recognize the type of equations and how to generate efficient code for a prescribed solution method. Finally, we compare the generated code for the turbulence scheme with the hand-written reference code.