Ulrich Ruede
Experiences with multigrid on 300 000 processor cores

Prof Dr Ulrich Ruede
Lehrstuhl fuer Simulation
Universitaet Erlangen-Nuernberg
Cauerstr 6
D-91058 Erlangen
Germany
ruede@cs.fau.de
Bjoern Gmeiner

We will present the Hierarchical Hybrid Grids (HHG) framework, the multigrid algorithms, and their implementation as they are are used to solve finite element systems with $10^{12}$ unknowns on Jugene. This IBM Blue Gene system employs almost 300 000 cores.