[petsc-users] CG+GAMG convergence issues in GHEP Krylov-Schur for some MPI runs

[Denis Davydov]

Hi Jose,

> On 3 Nov 2015, at 12:20, Jose E. Roman <jroman at dsic.upv.es> wrote:
> 
> I am answering the SLEPc-related questions:
> - Having different number of iterations when changing the number of processes is normal.
the change in iterations i mentioned are for different preconditioners, but the same number of MPI processes.


> - Yes, if you do not destroy the EPS solver, then the preconditioner would be reused.
> 
> Regarding the segmentation fault, I have no clue. Not sure if this is related to GAMG or not. Maybe running under valgrind could provide more information.
will try that.

Denis.