[petsc-users] gamg problem

[Benoit Fabrèges]

Dear PETSc developers,
I updated from 3.4 to 3.6 and I have a strange behavior with the GAMG 
preconditioner. I am running ex54 with the following options:
-ne 1023 -ksp_rtol 1e-10 -ksp_monitor_true_residual -options_left

I don't have the same behavior depending on the number of process used. 
It is for example not converging with 8 and 12 process with the reason 
KSP_DIVERGED_INDEFINITE_PC but it is working fine in other cases (I 
didn't try with more than 12 process).

Do you have the same behavior ? It is working fine with 3.4 version.

Best,

Benoit



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