[petsc-users] DMComposite and ksp

[gouarin]

Hi,

I'm still working on my stokes problem with 2 DM (one for the velocities 
and an other for the pressure). I do the best preallocation for my matrix.
After the construction of my matrix, I do a matrix vector operation and 
I compare the result for one process and 2 processes. If I pay attention 
to the numbering of my fields between these 2 problems, I have the same 
result.

But when I do just 2 iterations of my ksp solver, I don't have the same 
result at the end and of course the residual is not the same.

Do you know what I do wrong ?

Thanks,
Loic

-- 
Loic Gouarin
Laboratoire de Mathématiques
Université Paris-Sud
Bâtiment 425
91405 Orsay Cedex
France
Tel: (+33) 1 69 15 60 14
Fax: (+33) 1 69 15 67 18