[petsc-users] combining two PetscSFs

[Ataollah Mesgarnejad]

Dear all,

I was wondering if there is a way to combine two PetscSFs into one SF?
e.g., I'm doing two back to back  PetscSFBCasts:

                  Vec1--(SF1)-->Vec2--(SF2)-->Vec3

is there a way to combine SF3=SF1+SF2 so I can do one PetscSFBcast:

                    Vec1--(SF3)-->Vec3

Even if you can point me to somewhere in the source that something like
this is done?

Thanks as always,
Ata