Poor performance with BoomerAMG?

knutert at stud.ntnu.no knutert at stud.ntnu.no
Fri Feb 15 07:00:09 CST 2008


I am trying to use the hypre multigrid solver to solve a Poisson equation.
However, on a test case with grid size 257x257 it takes 40 seconds to converge
on one processor when I run with
./run -ksp_type richardson -pc_type hypre -pc_type_hypre boomeramg

Using the DMMG framework, the same problem takes less than a second,
and the default gmres solver uses only four seconds.

Am I somehow using the solver the wrong way, or is this performance expected?

Knut Erik Teigen

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