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Challenges at Petascale for Pseudo-Spectral Methods on Spheres (A Last Hurrah?)Conclusions: a) Proper software abstractions should enable rapid-exploration of platform-specific optimizations/ tradeoffs. b) Pseudo-spectra! methods are marginally viable for at least some classes of petascaie problems. i.e., GPU based machine with good bisection would be best. c) Scalability at exascale is possible, but the necessary resolution will make algorithm prohibitively expensive. Efficient implementations of realistic global transposes are mtricate and tedious in MPI. PS at petascaie requires exploration of a variety of strategies for spreading local and remote communic3tions. PGAS allows far simpler implementation and thus rapid exploration of variants.
Document ID
20110023399
Acquisition Source
Goddard Space Flight Center
Document Type
Presentation
Authors
Clune, Thomas
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Date Acquired
August 25, 2013
Publication Date
September 26, 2011
Subject Category
Mathematical And Computer Sciences (General)
Report/Patent Number
GSFC.CPR.5472.2011
Meeting Information
Meeting: Workshop on Advanced Computational Methods in Engineering and Environmental Science
Location: New York, NY
Country: United States
Start Date: September 26, 2011
End Date: September 28, 2011
Sponsors: City Univ. of New York
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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