[petsc-dev] What should MatDuplicate_SeqAIJMKL() do?

[Richard Tran Mills]

Fellow PETSc developers,

I'm trying to figure out what my MatDuplicate() implementation for AIJMKL
should do when the sparse inspector-executor model is being used. I think
that the behavior should be

* If MAT_COPY_VALUES has been specified, then mkl_sparse_optimize() should
be executed for the new matrix inside MatDuplicate_SeqAIJMKL().
* If MAT_COPY_VALUES has not been specified, then don't do the
mkl_sparse_optimize(), as the user is going to have to specify the nonzero
entries at some point, and then do MatAssemblyBegin/End (which calls
mkl_sparse_optimize).

I'm a little unclear on all of the situations in which MatDuplicate gets
used, however, so let me know if I'm misunderstanding something.

Thanks,
Richard
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