On Sun, Jun 3, 2012 at 9:09 AM, Niceno Bojan <bojan.niceno at psi.ch> wrote:
> Well, even above that, around 50 :-) > > You were right. Reducing 50 by a factor of 0.001, which I set, the > differences are indeed smaller than the solver tolerance :-) > Good > > > But, allow me to ask one more time, to make sure: I am using gmres with > Jacobi's preconditioner. The run is sequential, the nodes are not > renumbered. Is it safe to neglect these differences, even if they are > smaller than prescribed tolerances? > It's "safe" in the sense that both answers are equivalent, but it would be good to know what is causing the differences. How is the matrix assembled? Did you use -ksp_view_binary and ksp ex10 to check that the system really is identical? Does ksp ex10 give the same output each time you run it? Can you send a few iterations of output from -ksp_monitor_true_residual? -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.mcs.anl.gov/pipermail/petsc-users/attachments/20120603/3555a308/attachment.html>
