Oliveira de Souza Junior, Carlos Alberto
Cardoso, Joao M. P.
Diniz, Pedro C.
Total Authors: 5
 Univ Sao Paulo, Inst Math & Comp Sci, BR-13566590 Sao Carlos - Brazil
 Univ Porto, Fac Engn, Dept Informat Engn, P-4200465 Porto - Portugal
 INESC TEC, P-4200465 Porto - Portugal
 INESC ID, P-1000029 Lisbon - Portugal
Total Affiliations: 4
Web of Science Citations:
In this article, we focus on the acceleration of a chemical reaction simulation that relies on a system of stiff ordinary differential equation (ODEs) targeting heterogeneous computing systems with CPUs and field-programmable gate arrays (FPGAs). Specifically, we target an essential kernel of the coupled chemistry aerosol-tracer transport model to the Brazilian developments on the regional atmospheric modeling system (CCATT-BRAMS). We focus on a linear solve step using the QR factorization based on the modified Gram-Schmidt method as the basis of the ODE solver in this application. We target Intel hardware accelerator research program (HARP) architecture with the OpenCL programming environment for these early experiments. Our design exploration reveals a hardware design that is up to 4 times faster than the original iterative Jacobi method used in this solver. Still, even with hardware support, the overall performance of our QR-based hardware is lower than its original software version. (AU)