I meant to say that since its a serial computation, I have all the information on the same node and I am not exchanging data with another node. I wanted to know if DMDA_STENCIL_BOX would also change the jacobian structure. Looks like it does.
On Tue, Mar 18, 2014 at 9:14 PM, Barry Smith <[email protected]> wrote: > > On Mar 18, 2014, at 8:04 PM, Mani Chandra <[email protected]> wrote: > > > Hi, > > > > I see a 4x increase in the memory usage when I change from > DMDA_STENCIL_STAR to DMDA_STENCIL_BOX. Attached are the outputs of > -log_summary which shows a huge increase in the matrix memory usage. Is > this expected? > > > > On a different note, suppose I am running a serial calculation with no > need to exchange data but I am using corner node information, > > How can you use corner node information if you are not exchanging it? > You will be using incorrect data > > > > do I need to use DMDA_STENCIL_BOX? Would the jacobian when computed > using colored finite differences be correctly represented if I use corner > information but still use DMDA_STENCIL_STAR? > > > > Thanks, > > Mani > > > > > > <dmda_stencil_box.txt><dmda_stencil_star.txt> > >
