Ok great, i tried those command line args and this is the result: when i use -pc_type gamg:
[1]PETSC ERROR: --------------------- Error Message -------------------------------------------------------------- [1]PETSC ERROR: Petsc has generated inconsistent data [1]PETSC ERROR: Have un-symmetric graph (apparently). Use '-pc_gamg_sym_graph true' to symetrize the graph or '-pc_gamg_threshold -1.0' if the matrix is structurally symmetric. [1]PETSC ERROR: See http://www.mcs.anl.gov/petsc/documentation/faq.html for trouble shooting. [1]PETSC ERROR: Petsc Release Version 3.7.4, unknown [1]PETSC ERROR: ./ucmsMR on a arch-linux2-c-debug named ocean by valera Sat Jan 7 17:35:05 2017 [1]PETSC ERROR: Configure options --with-cc=gcc --with-cxx=g++ --with-fc=gfortran --download-fblaslapack --download-mpich --download-hdf5 --download-netcdf --download-hypre --download-metis --download-parmetis --download-trillinos [1]PETSC ERROR: #1 smoothAggs() line 462 in /usr/dataC/home/valera/petsc/src/ksp/pc/impls/gamg/agg.c [1]PETSC ERROR: #2 PCGAMGCoarsen_AGG() line 998 in /usr/dataC/home/valera/petsc/src/ksp/pc/impls/gamg/agg.c [1]PETSC ERROR: #3 PCSetUp_GAMG() line 571 in /usr/dataC/home/valera/petsc/src/ksp/pc/impls/gamg/gamg.c [1]PETSC ERROR: #4 PCSetUp() line 968 in /usr/dataC/home/valera/petsc/src/ksp/pc/interface/precon.c [1]PETSC ERROR: #5 KSPSetUp() line 390 in /usr/dataC/home/valera/petsc/src/ksp/ksp/interface/itfunc.c application called MPI_Abort(comm=0x84000002, 77) - process 1 when i use -pc_type gamg and -pc_gamg_sym_graph true: ------------------------------------------------------------------------ [0]PETSC ERROR: Caught signal number 8 FPE: Floating Point Exception,probably divide by zero [0]PETSC ERROR: Try option -start_in_debugger or -on_error_attach_debugger [0]PETSC ERROR: or see http://www.mcs.anl.gov/petsc/documentation/faq.html#valgrind [0]PETSC ERROR: or try http://valgrind.org on GNU/linux and Apple Mac OS X to find memory corruption errors [1]PETSC ERROR: ------------------------------------------------------------------------ [1]PETSC ERROR: --------------------- Stack Frames ------------------------------------ [1]PETSC ERROR: Note: The EXACT line numbers in the stack are not available, [1]PETSC ERROR: INSTEAD the line number of the start of the function [1]PETSC ERROR: is given. [1]PETSC ERROR: [1] LAPACKgesvd line 42 /usr/dataC/home/valera/petsc/src/ksp/ksp/impls/gmres/gmreig.c [1]PETSC ERROR: [1] KSPComputeExtremeSingularValues_GMRES line 24 /usr/dataC/home/valera/petsc/src/ksp/ksp/impls/gmres/gmreig.c [1]PETSC ERROR: [1] KSPComputeExtremeSingularValues line 51 /usr/dataC/home/valera/petsc/src/ksp/ksp/interface/itfunc.c [1]PETSC ERROR: [1] PCGAMGOptProlongator_AGG line 1187 /usr/dataC/home/valera/petsc/src/ksp/pc/impls/gamg/agg.c [1]PETSC ERROR: [1] PCSetUp_GAMG line 472 /usr/dataC/home/valera/petsc/src/ksp/pc/impls/gamg/gamg.c [1]PETSC ERROR: [1] PCSetUp line 930 /usr/dataC/home/valera/petsc/src/ksp/pc/interface/precon.c [1]PETSC ERROR: [1] KSPSetUp line 305 /usr/dataC/home/valera/petsc/src/ksp/ksp/interface/itfunc.c [0] PCGAMGOptProlongator_AGG line 1187 /usr/dataC/home/valera/petsc/src/ksp/pc/impls/gamg/agg.c [0]PETSC ERROR: [0] PCSetUp_GAMG line 472 /usr/dataC/home/valera/petsc/src/ksp/pc/impls/gamg/gamg.c [0]PETSC ERROR: [0] PCSetUp line 930 /usr/dataC/home/valera/petsc/src/ksp/pc/interface/precon.c [0]PETSC ERROR: [0] KSPSetUp line 305 /usr/dataC/home/valera/petsc/src/ksp/ksp/interface/itfunc.c [0]PETSC ERROR: --------------------- Error Message -------------------------------------------------------------- when i use -pc_type hypre it actually shows something different on -ksp_view : KSP Object: 2 MPI processes type: gcr GCR: restart = 30 GCR: restarts performed = 37 maximum iterations=10000, initial guess is zero tolerances: relative=1e-14, absolute=1e-50, divergence=10000. right preconditioning using UNPRECONDITIONED norm type for convergence test PC Object: 2 MPI processes type: hypre HYPRE BoomerAMG preconditioning HYPRE BoomerAMG: Cycle type V HYPRE BoomerAMG: Maximum number of levels 25 HYPRE BoomerAMG: Maximum number of iterations PER hypre call 1 HYPRE BoomerAMG: Convergence tolerance PER hypre call 0. HYPRE BoomerAMG: Threshold for strong coupling 0.25 HYPRE BoomerAMG: Interpolation truncation factor 0. HYPRE BoomerAMG: Interpolation: max elements per row 0 HYPRE BoomerAMG: Number of levels of aggressive coarsening 0 HYPRE BoomerAMG: Number of paths for aggressive coarsening 1 HYPRE BoomerAMG: Maximum row sums 0.9 HYPRE BoomerAMG: Sweeps down 1 HYPRE BoomerAMG: Sweeps up 1 HYPRE BoomerAMG: Sweeps on coarse 1 HYPRE BoomerAMG: Relax down symmetric-SOR/Jacobi HYPRE BoomerAMG: Relax up symmetric-SOR/Jacobi HYPRE BoomerAMG: Relax on coarse Gaussian-elimination HYPRE BoomerAMG: Relax weight (all) 1. HYPRE BoomerAMG: Outer relax weight (all) 1. HYPRE BoomerAMG: Using CF-relaxation HYPRE BoomerAMG: Not using more complex smoothers. HYPRE BoomerAMG: Measure type local HYPRE BoomerAMG: Coarsen type Falgout HYPRE BoomerAMG: Interpolation type classical HYPRE BoomerAMG: Using nodal coarsening (with HYPRE_BOOMERAMGSetNodal() 1 HYPRE BoomerAMG: HYPRE_BoomerAMGSetInterpVecVariant() 1 linear system matrix = precond matrix: Mat Object: 2 MPI processes type: mpiaij rows=200000, cols=200000 total: nonzeros=3373340, allocated nonzeros=3373340 total number of mallocs used during MatSetValues calls =0 not using I-node (on process 0) routines but still the timing is terrible. On Sat, Jan 7, 2017 at 5:28 PM, Jed Brown <[email protected]> wrote: > Manuel Valera <[email protected]> writes: > > > Awesome Matt and Jed, > > > > The GCR is used because the matrix is not invertible and because this was > > the algorithm that the previous library used, > > > > The Preconditioned im aiming to use is multigrid, i thought i configured > > the hypre-boomerAmg solver for this, but i agree in that it doesn't show > in > > the log anywhere, how can i be sure is being used ? i sent -ksp_view log > > before in this thread > > Did you run with -pc_type hypre? > > > I had a problem with the matrix block sizes so i couldn't make the petsc > > native multigrid solver to work, > > What block sizes? If the only variable is pressure, the block size > would be 1 (default). > > > This is a nonhidrostatic pressure solver, it is an elliptic problem so > > multigrid is a must, > > Yes, multigrid should work well. >
