Michael Lange <[email protected]> writes: > Hi Matt, > > Thanks for the clarification, this does make sense. I have achieved the > local DoF ordering I want by only permuting the offsets in the created > section. However, I am now trying to extract the according halo exchange > information from the associated PetscSF object and, although the local > leafs have been renumbered according to my permutation, the roots they > are connected to have not been updated. Is there an easy way to update > the roots or re-initialise the PetscSF from the reordered section?
You can SFBcast the new root numbers and create a new SF. Since this is a somewhat common operation that can be optimized by the SF implementation, it may make sense to provide PetscSFMoveRoots() or some such.
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