dolfin team mailing list archive

["Garth N. Wells" <gnw20@xxxxxxxxx>]

Johan Hake wrote:
> On Tuesday 07 July 2009 22:07:13 Garth N. Wells wrote:
> > Johan Hake wrote:
> > > On Tuesday 07 July 2009 19:18:22 Garth N. Wells wrote:
> > > > Kristian Oelgaard wrote:
> > > > > Hi,
> > > > >
> > > > > I get:
> > > > >
> > > > > Solving linear variational problem
> > > > >   Matrix of size 1089 x 1089 has 7361 nonzero entries.
> > > > >   Applying boundary conditions to linear system.
> > > > >   *** Warning: Ignoring unknown parameter "absolute_tolerance" in
> > > > > parameter set "krylov_solver" when updating parameter set "parameters".
> > > > >   *** Warning: Ignoring unknown parameter "divergence_limit" in
> > > > > parameter set "krylov_solver" when updating parameter set "parameters".
> > > > >   *** Warning: Ignoring unknown parameter "gmres_restart" in parameter
> > > > > set "krylov_solver" when updating parameter set "parameters".
> > > > >   *** Warning: Ignoring unknown parameter "maximum_iterations" in
> > > > > parameter set "krylov_solver" when updating parameter set "parameters".
> > > > >   *** Warning: Ignoring unknown parameter "monitor_convergence" in
> > > > > parameter set "krylov_solver" when updating parameter set "parameters".
> > > > >   *** Warning: Ignoring unknown parameter "relative_tolerance" in
> > > > > parameter set "krylov_solver" when updating parameter set "parameters".
> > > > >   *** Warning: Ignoring unknown parameter "report" in parameter set
> > > > > "krylov_solver" when updating parameter set "parameters".
> > > > >   *** Warning: Ignoring unknown parameter "shift_nonzero" in parameter
> > > > > set "krylov_solver" when updating parameter set "parameters".
> > > > > terminate called after throwing an instance of 'std::runtime_error'
> > > > >   what():  *** Error: Unable to access parameter "report" in parameter
> > > > > set "parameters", parameter not defined.
> > > > > [mech028:15991] *** Process received signal ***
> > > > > [mech028:15991] Signal: Aborted (6)
> > > > > [mech028:15991] Signal code:  (-6)
> > > > > [mech028:15991] [ 0] [0xb805d410]
> > > > > [mech028:15991] [ 1] /lib/tls/i686/cmov/libc.so.6(abort+0x188)
> > > > > [0xb6154098] [mech028:15991] [ 2]
> > > > > /usr/lib/libstdc++.so.6(_ZN9__gnu_cxx27__verbose_terminate_handlerEv+0x
> > > > > 15 8) [0xb636e8f8]
> > > > > [mech028:15991] [ 3] /usr/lib/libstdc++.so.6 [0xb636c7d5]
> > > > > [mech028:15991] [ 4] /usr/lib/libstdc++.so.6 [0xb636c812]
> > > > > [mech028:15991] [ 5] /usr/lib/libstdc++.so.6 [0xb636c94a]
> > > > > [mech028:15991] [ 6]
> > > > > /home/oelgaard/fenics/dolfin/local/lib/libdolfin.so.0(_ZNK6dolfin6Logge
> > > > > r5 errorESs+0x93) [0xb7f166a3]
> > > > > [mech028:15991] [ 7]
> > > > > /home/oelgaard/fenics/dolfin/local/lib/libdolfin.so.0(_ZN6dolfin5errorE
> > > > > Ss z+0x9f) [0xb7f1f62f]
> > > > > [mech028:15991] [ 8]
> > > > > /home/oelgaard/fenics/dolfin/local/lib/libdolfin.so.0(_ZN6dolfin10Param
> > > > > et ersclESs+0xb3) [0xb7fc7833]
> > > > > [mech028:15991] [ 9]
> > > > > /home/oelgaard/fenics/dolfin/local/lib/libdolfin.so.0(_ZN6dolfin17PETSc
> > > > > Kr ylovSolver5solveERKNS_11PETScMatrixERNS_11PETScVectorERKS4_+0xb2)
> > > > > [0xb7ee9ce2]
> > > > > [mech028:15991] [10]
> > > > > /home/oelgaard/fenics/dolfin/local/lib/libdolfin.so.0(_ZN6dolfin17PETSc
> > > > > Kr ylovSolver5solveERKNS_13GenericMatrixERNS_13GenericVectorERKS4_+0xfb)
> > > > > [0xb7eea3db]
> > > > > [mech028:15991] [11]
> > > > > /home/oelgaard/fenics/dolfin/local/lib/libdolfin.so.0(_ZN6dolfin12Krylo
> > > > > vS olver5solveERKNS_13GenericMatrixERNS_13GenericVectorERKS4_+0x18e)
> > > > > [0xb7e69c1e]
> > > > > [mech028:15991] [12]
> > > > > /home/oelgaard/fenics/dolfin/local/lib/libdolfin.so.0(_ZN6dolfin18Varia
> > > > > ti onalProblem12solve_linearERNS_8FunctionE+0xaaf) [0xb7e674af]
> > > > > [mech028:15991] [13]
> > > > > /home/oelgaard/fenics/dolfin/local/lib/libdolfin.so.0(_ZN6dolfin18Varia
> > > > > ti onalProblem5solveERNS_8FunctionE+0x2a) [0xb7e6814a]
> > > > > [mech028:15991] [14] ./demo(main+0x497) [0x805db07]
> > > > > [mech028:15991] [15]
> > > > > /lib/tls/i686/cmov/libc.so.6(__libc_start_main+0xe5) [0xb613d775]
> > > > > [mech028:15991] [16] ./demo [0x805d541]
> > > > > [mech028:15991] *** End of error message ***
> > > > >
> > > > > if I do:
> > > > >
> > > > >   problem.parameters("linear_solver") = "iterative";
> > > > >
> > > > > in the Poisson demo.
> > > > >
> > > > > Is this a bug, or am I using the new parameter system incorrectly?
> > > > Take a look at the change Johan made recently to LUSolver. Same thing
> > > > probably needs to be done for KrylovSolver.
> > > This one beats me... It is another problem here.
> > I've added a function to set parameters for PETScKrylovSolver and
> > everything works now.
>
> Ahh! I was only looking at the KrylovSolver class. 
>
> There is a lot of default_parameters functions for the different 
> KrylovSolvers, returning the same set of parameters. Is there a reason for 
> not being able to share some code here?

Yes - the reason is that I don't understand fully the parameter system 
yet :).

I'm taking the approach that it's easier to improve something that works 
than fix something which is broken. I think I understand how to do it 
now. Will take a look after fixing some uBLAS problems.

Garth

> Johan
>
> > > KrylovSolver::parameters get initialized. However, it looks like
> > >
> > >    solver.parameters.update(parameters["krylov_solver"]);
> > >
> > > does not update the krylov solvers parameters, but rather an empty
> > > parameters, and therefore the warnings.
> > What exactly does (or should)
> >
> >     solver.parameters.update(parameters["krylov_solver"]);
> >
> > do?
> >
> > Garth
> >
> > > Also note that in python we use square brackets for all levels in the
> > > parameter hierarchy, so it should be:
> > >
> > >   problem.parameters["linear_solver"] = "iterative"
> > >
> > > But
> > >
> > >   problem.parameters("linear_solver")
> > >
> > > should report an error message.
> > >
> > > Johan
> > >
> > > > Garth
> > > >
> > > > > Kristian
> > > > >
> > > > > _______________________________________________
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