[petsc-users] SNES convergence issue

Mon May 16 20:04:42 CDT 2011

RE: Does it do the same thing if you remove -snes_mf_operator?
the output is attached:

  ./pgfem -snes_monitor -ksp_type fgmres -ksp_monitor_true_residual -ksp_gmres_modifiedgramschmidt -ksp_rtol 1e-10 -pc_type none

  atol=1e-050, rtol=1e-008, stol=1e-008, maxit=50, maxf=10000
    0 SNES Function norm 7.071067809722e+001 
    0 KSP preconditioned resid norm 7.071067809722e+001 true resid norm 7.071067809722e+001 ||Ae||/||Ax|| 1.000000000000e+000
    1 KSP preconditioned resid norm 6.487377579675e+001 true resid norm 6.487377579675e+001 ||Ae||/||Ax|| 9.174537360193e-001
    2 KSP preconditioned resid norm 5.946077820276e+001 true resid norm 5.946077820276e+001 ||Ae||/||Ax|| 8.409023898909e-001
    3 KSP preconditioned resid norm 5.819067642395e+001 true resid norm 5.819067642395e+001 ||Ae||/||Ax|| 8.229404382736e-001
    4 KSP preconditioned resid norm 5.782978385330e+001 true resid norm 5.782978385330e+001 ||Ae||/||Ax|| 8.178366465923e-001
    5 KSP preconditioned resid norm 5.781901277269e+001 true resid norm 5.781901277269e+001 ||Ae||/||Ax|| 8.176843205094e-001
    6 KSP preconditioned resid norm 5.206124924795e+001 true resid norm 5.206124924794e+001 ||Ae||/||Ax|| 7.362572478284e-001
    7 KSP preconditioned resid norm 4.698325359049e+001 true resid norm 4.698325359046e+001 ||Ae||/||Ax|| 6.644435445218e-001
    8 KSP preconditioned resid norm 2.252503506952e+001 true resid norm 2.252503506964e+001 ||Ae||/||Ax|| 3.185521009807e-001
    9 KSP preconditioned resid norm 6.934718778605e+000 true resid norm 6.934718778631e+000 ||Ae||/||Ax|| 9.807173350955e-002
   10 KSP preconditioned resid norm 2.116841820236e-001 true resid norm 2.116841820007e-001 ||Ae||/||Ax|| 2.993666412160e-003
   11 KSP preconditioned resid norm 2.248667031844e-003 true resid norm 2.248666418030e-003 ||Ae||/||Ax|| 3.180094546595e-005
   12 KSP preconditioned resid norm 1.982189998703e-003 true resid norm 1.982189392148e-003 ||Ae||/||Ax|| 2.803239122418e-005
   13 KSP preconditioned resid norm 7.277701878363e-005 true resid norm 7.277706020826e-005 ||Ae||/||Ax|| 1.029223056074e-006
   14 KSP preconditioned resid norm 5.491342233241e-005 true resid norm 5.491344683351e-005 ||Ae||/||Ax|| 7.765934129213e-007
   15 KSP preconditioned resid norm 1.985911495745e-006 true resid norm 1.987317308127e-006 ||Ae||/||Ax|| 2.810491090744e-008
   16 KSP preconditioned resid norm 8.806822122196e-010 true resid norm 2.040010932359e-009 ||Ae||/||Ax|| 2.885011128806e-011
    1 SNES Function norm 7.037540247543e+001 
    0 KSP preconditioned resid norm 7.037540247543e+001 true resid norm 7.037540247543e+001 ||Ae||/||Ax|| 1.000000000000e+000
    1 KSP preconditioned resid norm 6.014879337697e+001 true resid norm 6.014879337697e+001 ||Ae||/||Ax|| 8.546848936029e-001
    2 KSP preconditioned resid norm 5.936532946785e+001 true resid norm 5.936532946785e+001 ||Ae||/||Ax|| 8.435522551872e-001
    3 KSP preconditioned resid norm 5.806472337970e+001 true resid norm 5.806472337970e+001 ||Ae||/||Ax|| 8.250712796986e-001
    4 KSP preconditioned resid norm 5.776376194749e+001 true resid norm 5.776376194749e+001 ||Ae||/||Ax|| 8.207947651547e-001
    5 KSP preconditioned resid norm 5.775321493826e+001 true resid norm 5.775321493826e+001 ||Ae||/||Ax|| 8.206448973194e-001
    6 KSP preconditioned resid norm 5.200122358332e+001 true resid norm 5.200122358332e+001 ||Ae||/||Ax|| 7.389119174342e-001
    7 KSP preconditioned resid norm 4.692806395721e+001 true resid norm 4.692806395717e+001 ||Ae||/||Ax|| 6.668248039300e-001
    8 KSP preconditioned resid norm 2.249722526208e+001 true resid norm 2.249722526213e+001 ||Ae||/||Ax|| 3.196745520566e-001
    9 KSP preconditioned resid norm 6.926914352987e+000 true resid norm 6.926914353057e+000 ||Ae||/||Ax|| 9.842806022282e-002
   10 KSP preconditioned resid norm 2.112669106382e-001 true resid norm 2.112669106262e-001 ||Ae||/||Ax|| 3.001999323555e-003
   11 KSP preconditioned resid norm 2.205894521142e-003 true resid norm 2.205894348027e-003 ||Ae||/||Ax|| 3.134467826024e-005
   12 KSP preconditioned resid norm 1.997274432688e-003 true resid norm 1.997274203505e-003 ||Ae||/||Ax|| 2.838028818666e-005
   13 KSP preconditioned resid norm 1.074423963192e-003 true resid norm 1.074423723438e-003 ||Ae||/||Ax|| 1.526703486794e-005
   14 KSP preconditioned resid norm 2.196883599631e-008 true resid norm 2.193274946006e-008 ||Ae||/||Ax|| 3.116536273838e-010
   15 KSP preconditioned resid norm 6.701870711306e-010 true resid norm 2.507972672018e-009 ||Ae||/||Ax|| 3.563706328918e-011
    2 SNES Function norm 7.036650604408e+001 
    0 KSP preconditioned resid norm 7.036650604408e+001 true resid norm 7.036650604408e+001 ||Ae||/||Ax|| 1.000000000000e+000
    1 KSP preconditioned resid norm 5.961660984718e+001 true resid norm 5.961660984718e+001 ||Ae||/||Ax|| 8.472299279693e-001
    2 KSP preconditioned resid norm 5.898186321330e+001 true resid norm 5.898186321330e+001 ||Ae||/||Ax|| 8.382093488676e-001
    3 KSP preconditioned resid norm 5.803844203063e+001 true resid norm 5.803844203063e+001 ||Ae||/||Ax|| 8.248021010773e-001
    4 KSP preconditioned resid norm 5.775247508524e+001 true resid norm 5.775247508524e+001 ||Ae||/||Ax|| 8.207381371055e-001
    5 KSP preconditioned resid norm 5.774197168106e+001 true resid norm 5.774197168106e+001 ||Ae||/||Ax|| 8.205888700071e-001
    6 KSP preconditioned resid norm 5.199097115954e+001 true resid norm 5.199097115953e+001 ||Ae||/||Ax|| 7.388596376656e-001
    7 KSP preconditioned resid norm 4.691863775585e+001 true resid norm 4.691863775585e+001 ||Ae||/||Ax|| 6.667751518948e-001
    8 KSP preconditioned resid norm 2.249247574480e+001 true resid norm 2.249247574465e+001 ||Ae||/||Ax|| 3.196474716331e-001
    9 KSP preconditioned resid norm 6.925581352168e+000 true resid norm 6.925581352175e+000 ||Ae||/||Ax|| 9.842156078967e-002
   10 KSP preconditioned resid norm 2.111959897559e-001 true resid norm 2.111959897926e-001 ||Ae||/||Ax|| 3.001370988355e-003
   11 KSP preconditioned resid norm 2.197554118182e-003 true resid norm 2.197554117525e-003 ||Ae||/||Ax|| 3.123011559148e-005
   12 KSP preconditioned resid norm 1.997607369649e-003 true resid norm 1.997607414609e-003 ||Ae||/||Ax|| 2.838861166927e-005
   13 KSP preconditioned resid norm 1.000748904690e-003 true resid norm 1.000748843027e-003 ||Ae||/||Ax|| 1.422194875499e-005
   14 KSP preconditioned resid norm 8.525193893681e-007 true resid norm 8.526861878498e-007 ||Ae||/||Ax|| 1.211778494893e-008
   15 KSP preconditioned resid norm 5.457483213140e-009 true resid norm 7.175955157596e-009 ||Ae||/||Ax|| 1.019796997324e-010
    3 SNES Function norm 7.036650590325e+001 
    0 KSP preconditioned resid norm 7.036650590325e+001 true resid norm 7.036650590325e+001 ||Ae||/||Ax|| 1.000000000000e+000
    1 KSP preconditioned resid norm 5.961656312518e+001 true resid norm 5.961656312518e+001 ||Ae||/||Ax|| 8.472292656843e-001
    2 KSP preconditioned resid norm 5.898128385953e+001 true resid norm 5.898128385953e+001 ||Ae||/||Ax|| 8.382011171710e-001
    3 KSP preconditioned resid norm 5.803842974968e+001 true resid norm 5.803842974968e+001 ||Ae||/||Ax|| 8.248019281997e-001
    4 KSP preconditioned resid norm 5.775247225502e+001 true resid norm 5.775247225502e+001 ||Ae||/||Ax|| 8.207380985270e-001
    5 KSP preconditioned resid norm 5.774196886175e+001 true resid norm 5.774196886175e+001 ||Ae||/||Ax|| 8.205888315833e-001
    6 KSP preconditioned resid norm 5.199096858866e+001 true resid norm 5.199096858865e+001 ||Ae||/||Ax|| 7.388596026089e-001
    7 KSP preconditioned resid norm 4.691863539211e+001 true resid norm 4.691863539209e+001 ||Ae||/||Ax|| 6.667751196372e-001
    8 KSP preconditioned resid norm 2.249247455418e+001 true resid norm 2.249247455410e+001 ||Ae||/||Ax|| 3.196474553536e-001
    9 KSP preconditioned resid norm 6.925581017184e+000 true resid norm 6.925581017176e+000 ||Ae||/||Ax|| 9.842155622589e-002
   10 KSP preconditioned resid norm 2.111959721825e-001 true resid norm 2.111959721155e-001 ||Ae||/||Ax|| 3.001370743147e-003
   11 KSP preconditioned resid norm 2.197552999267e-003 true resid norm 2.197553329081e-003 ||Ae||/||Ax|| 3.123010444916e-005
   12 KSP preconditioned resid norm 1.997607044290e-003 true resid norm 1.997607318404e-003 ||Ae||/||Ax|| 2.838861035889e-005
   13 KSP preconditioned resid norm 1.000461310492e-003 true resid norm 1.000461552464e-003 ||Ae||/||Ax|| 1.421786600915e-005
   14 KSP preconditioned resid norm 8.488175184617e-007 true resid norm 8.484518586716e-007 ||Ae||/||Ax|| 1.205760962237e-008
   15 KSP preconditioned resid norm 5.589522141624e-009 true resid norm 5.386565191049e-009 ||Ae||/||Ax|| 7.655013023463e-011
    4 SNES Function norm 7.036650608027e+001 
  STEP 0 (Newton iterations: 4)

  diverged reason: DIVERGED_LS_FAILURE
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