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Accession Number DE2012-1011379
Title Towards Optimal Petascale Simulations (TOPS), ER25785. Final Report.
Publication Date Apr 2011
Media Count 14p
Personal Author D. R. Reynolds
Abstract Multiscale, multirate scientific and engineering applications in the SciDAC portfolio possess resolution requirements that are practically inexhaustible and demand execution on the highest-capability computers available, which will soon reach the petascale. While the variety of applications is enormous, their needs for mathematical software infrastructure are surprisingly coincident; moreover the chief bottleneck is often the solver. At their current scalability limits, many applications spend a vast majority of their operations in solvers, due to solver algorithmic complexity that is superlinear in the problem size, whereas other phases scale linearly. Furthermore, the solver may be the phase of the simulation with the poorest parallel scalability, due to intrinsic global dependencies. The primary goals of TOPS are the development, testing, and dissemination of solver software, especially for systems governed by PDEs. Upon discretization, these systems possess mathematical structure that must be exploited for optimal scalability; therefore, application-targeted algorithmic research is included. TOPS software development includes attention to high performance as well as interoperability among the solver components. Support for integration of TOPS solvers into SciDAC applications is also directly supported by this proposal.
Keywords Algorithms
Implicit methods
Mathematical models
Petscale data
Plasma physics

Source Agency Technical Information Center Oak Ridge Tennessee
NTIS Subject Category 46 - Physics
62 - Computers, Control & Information Theory
Corporate Author California Univ., San Diego.
Document Type Technical report
Title Note N/A
NTIS Issue Number 1307
Contract Number DE-FC02-06ER25785

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