On Fri, 2016-10-28 at 09:46 -0400, Mark Adams wrote: > Please run with -info and grep on GAMG. > [0] PCSetUp_GAMG(): level 0) N=120726, n data rows=3, n data cols=6, nnz/row (ave)=41, np=1 [0] PCGAMGFilterGraph(): 99.904% nnz after filtering, with threshold 0., 13.7468 nnz ave. (N=40242) [0] PCGAMGCoarsen_AGG(): Square Graph on level 1 of 1 to square [0] PCGAMGProlongator_AGG(): New grid 1894 nodes [0] PCGAMGOptProlongator_AGG(): Smooth P0: max eigen=5.726852e+00 min=1.330683e-01 PC=jacobi [0] PCSetUp_GAMG(): 1) N=11364, n data cols=6, nnz/row (ave)=196, 1 active pes [0] PCGAMGFilterGraph(): 99.9839% nnz after filtering, with threshold 0., 32.7656 nnz ave. (N=1894) [0] PCGAMGProlongator_AGG(): New grid 155 nodes [0] PCGAMGOptProlongator_AGG(): Smooth P0: max eigen=1.011119e+01 min=1.832878e-04 PC=jacobi [0] PCSetUp_GAMG(): 2) N=930, n data cols=6, nnz/row (ave)=196, 1 active pes [0] PCGAMGFilterGraph(): 100.% nnz after filtering, with threshold 0., 32.7806 nnz ave. (N=155) [0] PCGAMGProlongator_AGG(): New grid 9 nodes [0] PCGAMGOptProlongator_AGG(): Smooth P0: max eigen=2.116373e+00 min=6.337173e-03 PC=jacobi [0] PCSetUp_GAMG(): 3) N=54, n data cols=6, nnz/row (ave)=34, 1 active pes [0] PCGAMGFilterGraph(): 100.% nnz after filtering, with threshold 0., 5.66667 nnz ave. (N=9) [0] PCGAMGProlongator_AGG(): New grid 2 nodes [0] PCGAMGOptProlongator_AGG(): Smooth P0: max eigen=1.984549e+00 min=8.582767e-03 PC=jacobi [0] PCSetUp_GAMG(): 4) N=12, n data cols=6, nnz/row (ave)=12, 1 active pes [0] PCSetUp_GAMG(): 5 levels, grid complexity = 1.48586 error: PETSc error 77-0 'Eigen estimator failed: DIVERGED_NANORINF at iteration 0' in /home/gtheler/libs/petsc-3.7.4/src/ksp/ksp/impls/cheby/cheby.c KSPSolve_Chebyshev:440
> > > >