[petsc-users] DMCreateMatrix with some dense row

[Sang pham van]

Hi,

I am using DMCreateMatrix to create matrix from a existed DM object and
defined stencil.
In my code, boundary nodes need to involve many inner nodes, thus matrix
rows corresponding to boundary nodes are almost dense. How can I  tell
petsc that those rows need to be preallocated with more entries? I don't
want to use MatMPIAIJSetPreallocation() since advantages of DM might be
lost.

Many thanks.

Sam.
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