Contribution to a conference proceedings/Contribution to a book

FZJ-2014-01820

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png A space-time parallel solver for the three-dimensional heat equation

Speck, R. (Corresponding Author)FZJ* ; Ruprecht, D. ; Emmett, M. ; Minion, M. ; Bolten, M. ; Krause, R.

2014
IOS Press

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Please use a persistent id in citations: doi:10.3233/978-1-61499-381-0-263

Abstract: The paper presents a combination of the time-parallel "parallel full approximation scheme in space and time" (PFASST) with a parallel multigrid method (PMG) in space, resulting in a mesh-based solver for the three-dimensional heat equation with a uniquely high degree of efficient concurrency. Parallel scaling tests are reported on the Cray XE6 machine “Monte Rosa” on up to 16,384 cores and on the IBM Blue Gene/Q system “JUQUEEN” on up to 65,536 cores. The efficacy of the combined spatial-and temporal parallelization is shown by demonstrating that using PFASST in addition to PMG significantly extends the strong-scaling limit. Implications of using spatial coarsening strategies in PFASST's multi-level hierarchy in large-scale parallel simulations are discussed.

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Contributing Institute(s):

1. Jülich Supercomputing Center (JSC)

Research Program(s):

1. 411 - Computational Science and Mathematical Methods (POF2-411) (POF2-411)
2. DFG project 450829162 - Raum-Zeit-parallele Simulation multimodale Energiesystemen (450829162) (450829162)

Appears in the scientific report 2014

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