xref: /petsc/src/snes/tests/output/ex5_fieldsplit_1.out (revision 70646cd191a02c3aba559ba717dac5da7a8a1e20)

atol=1e-50, rtol=1e-08, stol=1e-08, maxit=50, maxf=10000
  0 SNES Function norm 5.41468
    0 KSP Residual norm 8.074499924421e-01
    1 KSP Residual norm 1.581263746959e-01
    2 KSP Residual norm 5.965136688585e-17
  1 SNES Function norm 0.295258
    0 KSP Residual norm 1.576599996438e-02
    1 KSP Residual norm 5.004825340514e-03
    2 KSP Residual norm 1.017575130448e-18
  2 SNES Function norm 0.000450229
    0 KSP Residual norm 2.805395382507e-05
    1 KSP Residual norm 1.214493572741e-05
    2 KSP Residual norm 3.059468828362e-21
  3 SNES Function norm 1.38967e-09
SNES Object: 1 MPI process
  type: newtonls
  maximum iterations=50, maximum function evaluations=10000
  tolerances: relative=1e-08, absolute=1e-50, solution=1e-08
  total number of linear solver iterations=6
  total number of function evaluations=4
  norm schedule ALWAYS
  SNESLineSearch Object: 1 MPI process
    type: bt
      interpolation: cubic
      alpha=1.000000e-04
    maxlambda=1.000000e+00, minlambda=1.000000e-12
    tolerances: relative=1.000000e-08, absolute=1.000000e-15, lambda=1.000000e-08
    maximum iterations=40
  KSP Object: 1 MPI process
    type: gmres
      restart=30, using classical (unmodified) Gram-Schmidt orthogonalization with no iterative refinement
      happy breakdown tolerance=1e-30
    maximum iterations=10000, initial guess is zero
    tolerances: relative=1e-05, absolute=1e-50, divergence=10000.
    left preconditioning
    using PRECONDITIONED norm type for convergence test
  PC Object: 1 MPI process
    type: fieldsplit
      FieldSplit with MULTIPLICATIVE composition: total splits = 2, blocksize = 5
      Solver info for each split is in the following KSP objects:
    Split number 0 Fields  0, 1
    KSP Object: (fieldsplit_0_) 1 MPI process
      type: preonly
      maximum iterations=10000, initial guess is zero
      tolerances: relative=1e-05, absolute=1e-50, divergence=10000.
      left preconditioning
      not checking for convergence
    PC Object: (fieldsplit_0_) 1 MPI process
      type: ilu
        out-of-place factorization
        0 levels of fill
        tolerance for zero pivot 2.22045e-14
        matrix ordering: natural
        factor fill ratio given 1., needed 1.
          Factored matrix:
            Mat Object: (fieldsplit_0_) 1 MPI process
              type: seqaij
              rows=2, cols=2, bs=2
              package used to perform factorization: petsc
              total: nonzeros=3, allocated nonzeros=3
                not using I-node routines
      linear system matrix, which is also used to construct the preconditioner:
      Mat Object: (fieldsplit_0_) 1 MPI process
        type: seqaij
        rows=2, cols=2, bs=2 variable blocks set
        total: nonzeros=3, allocated nonzeros=3
        total number of mallocs used during MatSetValues calls=0
          not using I-node routines
    Split number 1 Fields  2, 3, 4
    KSP Object: (fieldsplit_1_) 1 MPI process
      type: preonly
      maximum iterations=10000, initial guess is zero
      tolerances: relative=1e-05, absolute=1e-50, divergence=10000.
      left preconditioning
      not checking for convergence
    PC Object: (fieldsplit_1_) 1 MPI process
      type: ilu
        out-of-place factorization
        0 levels of fill
        tolerance for zero pivot 2.22045e-14
        matrix ordering: natural
        factor fill ratio given 1., needed 1.
          Factored matrix:
            Mat Object: (fieldsplit_1_) 1 MPI process
              type: seqaij
              rows=3, cols=3, bs=3
              package used to perform factorization: petsc
              total: nonzeros=6, allocated nonzeros=6
                not using I-node routines
      linear system matrix, which is also used to construct the preconditioner:
      Mat Object: (fieldsplit_1_) 1 MPI process
        type: seqaij
        rows=3, cols=3, bs=3 variable blocks set
        total: nonzeros=6, allocated nonzeros=6
        total number of mallocs used during MatSetValues calls=0
          not using I-node routines
    linear system matrix, which is also used to construct the preconditioner:
    Mat Object: 1 MPI process
      type: seqaij
      rows=5, cols=5, bs=5 variable blocks set
      total: nonzeros=11, allocated nonzeros=15
      total number of mallocs used during MatSetValues calls=0
        not using I-node routines
number of SNES iterations = 3

Norm of error 1.49752e-10, Iterations 3