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Adapting the CFDNS Compressible Navier-Stokes Solver to the Roadrunner Hybrid Supercomputer

J. MOHD-YUSOF, D. LIVESCU, T. KELLEY

Abstract


We present a brief overview of the Roadrunner hybrid architecture, followed by a summary of the original code to be adapted. The coding challenges of porting the CFDNS compressible Navier-Stokes solver to the hybrid architecture will be discussed, along with the code modification predicated by the serial speedup on the CBE. Performance results from the initial stages, performed on the single-precision development system, through to the current full simulations, which are ongoing at the time of the submittal, are presented. We observe that the overall coding effort and benefits realized are considerable, but many of the global modifications to the code will be applicable to a variety of future directions in high-performance computing.

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