[petsc-dev] Adding DMLocalToLocalBegin/End: What about PetscSF?

[Richard Tran Mills]

PETSc developers,

I am finally getting around to adding the DMLocalToLocalBegin/End routines 
that I had mentioned several months ago.  Looking at 
DMGlobalToLocalBegin() in src/interface/dm/dm.c, I see that a little over 
a year ago, Matt added the use of a default 'PetscSF' ("star forest") if 
present to handle the global-to-local and local-to-global operations.  I 
am not familiar with PetscSF, but I assume that it should be possible to 
use these somehow (maybe needing to add a little bit of code) for 
local-to-local operations, since the communication pattern is the same as 
for a global-to-local.  Could someone who is familiar with PetscSF comment 
on this?

Thanks,
Richard

-- 
Richard Tran Mills, Ph.D.
Computational Earth Scientist      | Joint Assistant Professor
Hydrogeochemical Dynamics Team     | EECS and Earth & Planetary Sciences
Oak Ridge National Laboratory      | University of Tennessee, Knoxville
E-mail: rmills at ornl.gov  V: 865-241-3198 http://climate.ornl.gov/~rmills