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Tera-scalable Algorithms for Variable-Density Elliptic Hydrodynamics with Spectral Accuracy

Description: A hybrid spectral/compact solver for variable-density viscous incompressible flow is described. Parallelization strategies for the FFTs and band-diagonal matrices are discussed and compared. Transpose methods are found to be highly competitive with direct block parallel methods when the problem is scaled to tens of thousands of processors. Various mapping strategies for the IBM BlueGene/L torus configuration of processors are explored. By optimizing the communication, we have achieved virtually… more
Date: April 13, 2005
Creator: Cook, A. W.; Cabot, W. H.; Welcome, M. L.; Williams, P. L.; Miller, B. J.; de Supinski, B. R. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Toward Enhancing OpenMP's Work-Sharing Directives

Description: OpenMP provides a portable programming interface for shared memory parallel computers (SMPs). Although this interface has proven successful for small SMPs, it requires greater flexibility in light of the steadily growing size of individual SMPs and the recent advent of multithreaded chips. In this paper, we describe two application development experiences that exposed these expressivity problems in the current OpenMP specification. We then propose mechanisms to overcome these limitations, inclu… more
Date: May 17, 2006
Creator: Chapman, B M; Huang, L; Jin, H; Jost, G & de Supinski, B R
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Towards an Error Model for OpenMP

Description: OpenMP lacks essential features for developing mission-critical software. In particular, it has no support for detecting and handling errors or even a concept of them. In this paper, the OpenMP Error Model Subcommittee reports on solutions under consideration for this major omission. We identify issues with the current OpenMP specification and propose a path to extend OpenMP with error-handling capabilities. We add a construct that cleanly shuts down parallel regions as a first step. We then di… more
Date: March 22, 2010
Creator: Wong, M.; Klemm, M.; Duran, A.; Mattson, T.; Haab, G.; de Supinski, B. R. et al.
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Partner: UNT Libraries Government Documents Department
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