Hi, I would like to compare PETSc DMMG convergence to some theoretical convergence rate given by local Fourier analysis for a simple diffusion problem. To do so, I need to extract the residuals after each multigrid iteration. Unfortunately, I only managed to obtain the residuals at the last iteration. Is it possible to get the residual printed out after each multigrid iteration without modifying the source code?
Furthermore, I'd like to test the AMG from the PC type from HYPRE (boomeramg). I have already ran --download-hypre while compiling petsc. Is there any example available somewhere? Best regards, Nicolas. -- Nicolas BATHFIELD Chalmers University of Technology Shipping and Marine Technology phone: +46 (0)31 772 1476 fax: +46 (0)31 772 3699
