Weird (?) results obtained from experiments with the SNESMF module
Rafael Santos Coelho
rafaelsantoscoelho at gmail.com
Fri Dec 19 16:39:19 CST 2008
Hey, Barry,
here's what you asked:
--------------------------------------------------------------------------------------------------------
JFNK
KSP SOLVER: GMRES
MESH SIZE : 512 x 512 unknows
NUMBER OF PROCESSORS : 24
Linear solve converged due to CONVERGED_RTOL iterations 25042
Linear solve converged due to CONVERGED_RTOL iterations 33804
Linear solve converged due to CONVERGED_RTOL iterations 33047
Linear solve converged due to CONVERGED_RTOL iterations 21219
SNES Object:
type: ls
line search variant: SNESLineSearchCubic
alpha=0.0001, maxstep=1e+08, steptol=1e-12
maximum iterations=100, maximum function evaluations=1000000
tolerances: relative=1e-08, absolute=1e-50, solution=1e-08
total number of linear solver iterations=113112
total number of function evaluations=116893
KSP Object:
type: gmres
GMRES: restart=30, using Classical (unmodified) Gram-Schmidt
Orthogonalization with no iterative refinement
GMRES: happy breakdown tolerance 1e-30
maximum iterations=1000000, initial guess is zero
tolerances: relative=1e-05, absolute=1e-50, divergence=10000
left preconditioning
PC Object:
type: none
linear system matrix = precond matrix:
Matrix Object:
type=mffd, rows=262144, cols=262144
matrix-free approximation:
err=1e-07 (relative error in function evaluation)
Using wp compute h routine
Computes normA
Does not compute normU
Nonlinear solve converged due to CONVERGED_FNORM_RELATIVE
Max Max/Min
Avg Total
Time (sec): 8.080e+02 1.00009 8.080e+02
Objects: 6.600e+01 1.00000 6.600e+01
Flops: 1.044e+11 1.01176 1.036e+11
2.485e+12
Flops/sec: 1.292e+08 1.01184 1.282e+08
3.076e+09
Memory: 5.076e+06 1.01530
1.207e+08
MPI Messages: 4.676e+05 2.00000 3.702e+05 8.884e+06
MPI Message Lengths: 4.002e+08 2.00939 8.623e+02 7.661e+09
MPI Reductions: 9.901e+03 1.00000
Object Type Creations Destructions Memory Descendants' Mem.
--- Event Stage 0: Main Stage
SNES 1 1 124
0
Krylov Solver 1 1 16880 0
Preconditioner 1 1 0
0
Distributed array 1 1 46568 0
Index Set 6 6 135976 0
Vec 46 46 3901252 0
Vec Scatter 3 3 0
0
IS L to G Mapping 1 1 45092 0
MatMFFD 1 1 0 0
Matrix 4 4 1011036 0
Viewer 1 1
0 0
OptionTable: -ksp_converged_reason
OptionTable: -ksp_max_it 1000000
OptionTable: -ksp_type gmres
OptionTable: -log_summary
OptionTable: -option_table
OptionTable: -par 4.0
OptionTable: -pc_type none
OptionTable: -snes_converged_reason
OptionTable: -snes_max_funcs 1000000
OptionTable: -snes_max_it 100
OptionTable: -snes_mf
OptionTable: -snes_view
OptionTable: -xdiv 512
OptionTable: -ydiv 512
--------------------------------------------------------------------------------------------------------
--------------------------------------------------------------------------------------------------------
NK
KSP SOLVER: GMRES
MESH SIZE : 512 x 512 unknows
NUMBER OF PROCESSORS : 24
Linear solve converged due to CONVERGED_RTOL iterations 25038
Linear solve converged due to CONVERGED_RTOL iterations 25995
Linear solve converged due to CONVERGED_RTOL iterations 26769
SNES Object:
type: ls
line search variant: SNESLineSearchCubic
alpha=0.0001, maxstep=1e+08, steptol=1e-12
maximum iterations=100, maximum function evaluations=1000000
tolerances: relative=1e-08, absolute=1e-50, solution=1e-08
total number of linear solver iterations=77802
total number of function evaluations=4
KSP Object:
type: gmres
GMRES: restart=30, using Classical (unmodified) Gram-Schmidt
Orthogonalization with no iterative refinement
GMRES: happy breakdown tolerance 1e-30
maximum iterations=1000000, initial guess is zero
tolerances: relative=1e-05, absolute=1e-50, divergence=10000
left preconditioning
PC Object:
type: none
linear system matrix = precond matrix:
Matrix Object:
type=mpiaij, rows=262144, cols=262144
total: nonzeros=1308672, allocated nonzeros=1308672
not using I-node (on process 0) routines
Nonlinear solve converged due to CONVERGED_FNORM_RELATIVE
Max Max/Min
Avg Total
Time (sec): 5.329e+02 1.00008 5.329e+02
Objects: 6.300e+01 1.00000 6.300e+01
Flops: 6.553e+10 1.01230 6.501e+10
1.560e+12
Flops/sec: 1.230e+08 1.01230 1.220e+08
2.928e+09
Memory: 4.989e+06 1.01589
1.186e+08
MPI Messages: 3.216e+05 1.99999 2.546e+05 6.111e+06
MPI Message Lengths: 2.753e+08 2.00939 8.623e+02 5.269e+09
MPI Reductions: 6.704e+03 1.00000
Object Type Creations Destructions Memory Descendants' Mem.
--- Event Stage 0: Main Stage
SNES 1 1
124 0
Krylov Solver 1 1 16880
0
Preconditioner 1 1
0 0
Distributed array 1 1 46568 0
Index Set 6 6 135976
0
Vec 45 45 3812684
0
Vec Scatter 3 3
0 0
IS L to G Mapping 1 1 45092 0
Matrix 3 3
1011036 0
Viewer 1 1
0 0
OptionTable: -ksp_converged_reason
OptionTable: -ksp_max_it 1000000
OptionTable: -ksp_type gmres
OptionTable: -log_summary
OptionTable: -option_table
OptionTable: -par 4.0
OptionTable: -pc_type none
OptionTable: -snes_converged_reason
OptionTable: -snes_max_funcs 1000000
OptionTable: -snes_max_it 100
OptionTable: -snes_view
OptionTable: -xdiv 512
OptionTable: -ydiv 512
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