I'm solving a 3D Poisson equation on a 200x200x100 grid using CG and algebraic multigrid as preconditioner. I noticed that with boomeramg, the memory increases as the number of procs increases:
1 proc: 2.8G 2 procs: 2.8G 4 procs: 5.2G 8 procs: >12G (max reached, swapping) The memory usage is obtained from top. When using ml or gamg (all with PETSc defaults), the memory usage remains more or less constant. Something wrong with my install? Some Hypre option I should set? dr. ir. Christiaan Klaij CFD Researcher Research & Development E mailto:C.Klaij at marin.nl T +31 317 49 33 44 MARIN 2, Haagsteeg, P.O. Box 28, 6700 AA Wageningen, The Netherlands T +31 317 49 39 11, F +31 317 49 32 45, I www.marin.nl
