mld_mat.mtx            ! This matrix (and others) from: http://math.nist.gov/MatrixMarket/ or 
mld_rhs.mtx            ! rhs          | http://www.cise.ufl.edu/research/sparse/matrices/index.html
NONE                        ! Initial guess
mld_sol.mtx                        ! Reference solution
MM                          ! File format: MatrixMarket or Harwell-Boeing
CSR                         ! Storage format: CSR COO JAD 
0                           ! IPART (partition method): 0 (block)  2 (graph, with Metis) 
FCG                         ! Iterative method: BiCGSTAB BiCG CGS RGMRES BiCGSTABL CG
2                           ! ISTOPC
00500                       ! ITMAX
1                           ! ITRACE
30                          ! IRST (restart for RGMRES and BiCGSTABL) 
1.d-6                       ! EPS
ML-VCYCLE-FBGS-SLUD         ! Longer descriptive name for preconditioner (up to 20 chars) 
ML                          ! Preconditioner type: NONE JACOBI BJAC AS ML
VCYCLE                      ! Type of multilevel correction: ADD MULT
1                           ! Number of outer sweeps
-3                          ! Max Number of levels in a multilevel preconditioner; if <0, lib default
-3                          ! Target coarse matrix size; if <0, lib default
SMOOTHED                    ! Type of aggregation: SMOOTHED NONSMOOTHED
DEC                         ! Parallel aggregation: DEC, SYMDEC
NATURAL                     ! Ordering of aggregation NATURAL DEGREE
NOFILTER                    ! Filtering of matrix ? FILTER NOFILTER
-1.5                        ! Coarsening ratio, if < 0 use library default
2                           ! Number of thresholds in vector, next line ignored if <= 0
0.05 0.025                  ! Thresholds 
0.0100d0                    ! Smoothed aggregation threshold: >= 0.0
EIG_EST                     ! Omega algorithm: EIG_EST  USER_CHOICE
A_NORMI                     ! Estimate procedure if EIG_EST
1.0                         ! Estimate value (if USER_CHOICE)
FBGS                        ! Smoother type  JACOBI BJAC AS ignored for non-ML
1                           ! Number of sweeps for (pre) smoother
0                           ! Number of overlap layers for AS preconditioner
HALO                        ! AS restriction operator: NONE HALO 
NONE                        ! AS prolongation operator: NONE SUM AVG
DSCALE                      ! Subdomain solver: DSCALE ILU MILU ILUT UMF SLU MUMPS 
0                           ! Fill level P for ILU(P) and ILU(T,P)
1.d-4                       ! Threshold T for ILU(T,P) 
NONE                        ! Second (post) smoother, ignored if NONE
1                           ! Number of sweeps for (post) smoother
0                           ! Number of overlap layers for AS preconditioner
HALO                        ! AS restriction operator: NONE HALO 
NONE                        ! AS prolongation operator: NONE SUM AVG
DSCALE                      ! Subdomain solver: DSCALE ILU MILU ILUT UMF SLU MUMPS 
0                           ! Fill level P for ILU(P) and ILU(T,P)
1.d-4                       ! Threshold T for ILU(T,P) 
SLUDIST                     ! Coarsest-level solver: JACOBI BJAC UMF SLU SLUDIST MUMPS
DIST                        ! Coarsest-level matrix distribution: DIST  REPL           
SLUDIST                     ! Coarsest-level subsolver: ILU UMF SLU MUMPS SLUDIST
1                           ! Coarsest-level fillin P for ILU(P) and ILU(T,P)
1.d-4                       ! Coarsest-level threshold T for ILU(T,P) 
1                           ! Number of Jacobi sweeps for BJAC/PJAC coarsest-level solver