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reordering does not work for ICC?

To: petsc-users@xxxxxxxxxxx
Subject: reordering does not work for ICC?
From: Zhifeng Sheng <z.sheng@xxxxxxxxxxxxxx>
Date: Tue, 06 Nov 2007 10:29:04 +0100
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Dear all

I tried to reorder my the preconditioner with different reordering schema.

All worked well for ILU, but does not make any difference on ICC. It seems that the reordering schema does not work for ICC at all....

Is it supposed to be like this?

PS: I have a symmetric matrix and I would like to save some memory. I used SBAIJ with block=1, but some told me it's not efficient ... So... what can I do to save some memory on matrix and preconditioner?


Thank you
Best regards
Zhifeng Sheng

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