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

[Jed Brown]

Track it here.

https://gitlab.com/petsc/petsc/-/issues/970

Barry Smith <bsmith at petsc.dev> writes:

>    We might consider having a universal reproduce flag that fixes everything to be reproducible (for debugging purposes) instead of operation specific ones like -matstash_reproduce.
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>> On Jul 29, 2021, at 11:45 AM, Jed Brown <jed at jedbrown.org> wrote:
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>> 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