Iterative Stokes demo does not set nullspace for AMG
Bug #1092262 reported by
Garth Wells
This bug affects 2 people
| Affects | Status | Importance | Assigned to | Milestone | |
|---|---|---|---|---|---|
| DOLFIN |
New
|
Medium
|
Garth Wells | ||
Bug Description
The iterative Stokes demo (with AMG) does not attach the operator nullspace to the preconditioner. This will lead to poor performance for AMG that is based on smoothed aggregation, e.g. ML and PETSc GAMG.
| Changed in dolfin: | |
| importance: | Undecided → Medium |
| assignee: | nobody → Garth Wells (garth-wells) |
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