[petsc-users] Is PetscSFBcast deterministic (just checking, I assume it is)

[Jed Brown]

Provided it's the same SF, yes. (We use MPI_Waitall instead of MPI_Waitsome or this, though we may be able to shave some time using MPI_Waitsome.)

Matrix assembly from the stash is a common place; try -matstash_reproduce.

Mark Adams <mfadams at lbl.gov> writes:

> GAMG is not deterministic and I'm trying to figure out why.
> Thanks,
> Mark