Laslo,
We figured out a way to implement ILU(0) with reordering
without allocating workspace.
We'll add this support later. I'll let you know when
it is done.
Thanks for your request that help us to make petsc
better.
Hong
On Fri, 4 Aug 2006, Laslo Tibor Diosady wrote:
Hong,
The space required remains the same, but
the row-compressed matrix format
for the factor will be changed with the
reordering.
To store the new format over the
existing memory, temp space has to be allocated during
implementation. Thus replacing the original memory with
newly allocated space would make implementation easier.
I guess this depends upon the implementation of the ILU(0) factorization
for the AIJ or BAIJ formats, which I didn't (nor do I ever really want
to) look into.
Thanks for the help,
Laslo