ffc team mailing list archive

[Kristian Oelgaard <k.b.oelgaard@xxxxxxxxx>]

On 2 February 2010 00:14, Anders Logg <logg@xxxxxxxxx> wrote:
> On Tue, Feb 02, 2010 at 12:06:35AM +0100, Anders Logg wrote:
> > The unit tests are taking a very long time. Would it be possible to
> > add some printing along the way so it doesn't look like it's stalling?
> >
> > Some regression tests are still failing. Can these be ignored and
> > should we then update the references?
>
> I get this when I run the unit tests now:
>
> ======================================================================
> FAIL: Test evaluate basis agains FIAT.FiniteElement.tabulate().
> ----------------------------------------------------------------------
> Traceback (most recent call last):
>  File
>  "/home/logg/work/src/fenics/ffc/ffc-main/test/unit/evaluate_basis/test.py",
>  line 20, in testAgainsFiat
>    self.assertEqual(error, 0, "Errors while testing evaluate_basis
>    against FIAT, see fiat_errors.log for details")
> AssertionError: Errors while testing evaluate_basis against FIAT, see
> fiat_errors.log for details
>
> And things like this in error.log:
>
> -------------------------------------------------------------------------------
> <CG3 on a <interval of degree 1>>
>  evaluate_basis()
>  error: 3.9999999632e-09 (tol: 1e-14)
>  evaluate_basis_derivatives(), order = 2
>  error: 1.42108547152e-14 (tol: 1e-14)
>  evaluate_basis_derivatives(), order = 3
>  error: 7.1054273576e-14 (tol: 1e-14)
> -------------------------------------------------------------------------------
>
> -------------------------------------------------------------------------------
> <CG4 on a <interval of degree 1>>
>  evaluate_basis()
>  error: 4.9760000842e-09 (tol: 1e-14)
>  evaluate_basis_derivatives(), order = 1
>  error: 4.00000121914e-09 (tol: 1e-14)
>  evaluate_basis_derivatives(), order = 2
>  error: 3.33344019054e-09 (tol: 1e-14)
>  evaluate_basis_derivatives(), order = 3
>  error: 1.13686837722e-12 (tol: 1e-14)
>  evaluate_basis_derivatives(), order = 4
>  error: 1.09139364213e-11 (tol: 1e-14)
> -------------------------------------------------------------------------------
>
> So the tolerance might need to be increased. Something like 1e-8
> should be ok.

Yes, I was working with two  tolerances one of 1e-12 and one 1e-8, I've changed both to 1e-8 so all values are now green.

> I also get this:
>
> *** FFC: Sorry, finite element of type "Brezzi-Douglas-Fortin-Marini"
> are not supported by FIAT.
> *** FFC: To get more information about this error, rerun FFC with
> --debug.
>
> I didn't think BDFM was supported by the new FIAT.

They're not, I had it in there to test the testing environment, I've commented them out now so everything should be in working order.

Kristian

> --
> Anders
>
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