TY  - CONF
AU  - Speck, Robert
AU  - Ruprecht, Daniel
AU  - Emmett, Matthew
AU  - Minion, Michael
AU  - Bolten, Matthias
AU  - Krause, Rolf
TI  - A space-time parallel solver for the three-dimensional heat equation
VL  - 25
PB  - IOS Press
M1  - FZJ-2014-01820
T2  - Advances in Parallel Computing
SP  - 263 - 272
PY  - 2014
AB  - 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.
T2  - International Conference on Parallel Computing
CY  - 10 Sep 2013 - 13 Sep 2013, Munich (Germany)
Y2  - 10 Sep 2013 - 13 Sep 2013
M2  - Munich, Germany
LB  - PUB:(DE-HGF)8 ; PUB:(DE-HGF)7
UR  - <Go to ISI:>//WOS:000452120400026
DO  - DOI:10.3233/978-1-61499-381-0-263
UR  - https://juser.fz-juelich.de/record/151996
ER  -