petsc-3.8.4 2018-03-24

ISColoringType

determines if the coloring is for the entire parallel grid/graph/matrix or for just the local ghosted portion

typedef enum {IS_COLORING_GLOBAL,IS_COLORING_LOCAL} ISColoringType;

  IS_COLORING_GLOBAL - does not include the colors for ghost points, this is used when the function

                       is called synchronously in parallel. This requires generating a "parallel coloring".

  IS_COLORING_LOCAL - includes colors for ghost points, this is used when the function can be called

                        separately on individual processes with the ghost points already filled in. Does not

                        require a "parallel coloring", rather each process colors its local + ghost part.

                        Using this can result in much less parallel communication. Currently only works

                        with DMDA and if you call MatFDColoringSetFunction() with the local function.