%0 Conference Paper
%A Speck, Robert
%A Ruprecht, Daniel
%A Emmett, Matthew
%A Minion, Michael
%A Bolten, Matthias
%A Krause, Rolf
%T A space-time parallel solver for the three-dimensional heat equation
%V 25
%I IOS Press
%M FZJ-2014-01820
%B Advances in Parallel Computing
%P 263 - 272
%D 2014
%< Parallel Computing: Accelerating Computational Science and Engineering (CSE)
%X 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.
%B International Conference on Parallel Computing
%C 10 Sep 2013 - 13 Sep 2013, Munich (Germany)
Y2 10 Sep 2013 - 13 Sep 2013
M2 Munich, Germany
%F PUB:(DE-HGF)8 ; PUB:(DE-HGF)7
%9 Contribution to a conference proceedingsContribution to a book
%U <Go to ISI:>//WOS:000452120400026
%R 10.3233/978-1-61499-381-0-263
%U https://juser.fz-juelich.de/record/151996