On 20 November 2011 19:09, Anders Logg <l...@simula.no> wrote: > On Sun, Nov 20, 2011 at 07:48:19PM +0100, Marie E. Rognes wrote: >> On 11/20/2011 07:29 PM, Garth N. Wells wrote: >> >I'm trying to track down a bug that leads to a silent failure. I'm as >> >far as a call to the FFC function >> > >> > ffc.tensor.estimate_cost >> > >> >which fails to return. This function is called from the function >> > >> > ffc.analysis._auto_select_representation >> > >> >What I don't get is why it's even being called. Since the code that >> >I'm running is: >> > >> > from dolfin import * >> > mesh = UnitSquare(32, 32) >> > V = FunctionSpace(mesh, "Lagrange", 1) >> > print "------------- end" >> > >> >It's only a FunctionSpace, so why is FFC going through code that is >> >for analysing forms? >> > >> > >> >> >> Because of the use of a dummy form for generating function >> spaces, see def jit_element(...) in ffc/jitcompiler.py. >> >> This has already resurfaced recently, cf >> >> https://bugs.launchpad.net/dolfin/+bug/884670 > > Not going via the form jit compiler would require some refactoring of > the jit code in FFC. This would be good to do in the long run, but I > don't think it's a good idea to do at the moment since the jit chain > is complex, fragile and error prone. Changes would likely introduce > bugs. > > Do you have an example of a form that hangs ffc.tensor.estimate_cost? > It should be easy to debug. >
I think that it likely a symptom rather than the cause. I think a build configuration is the problem, and related to shared libs. See https://bugs.launchpad.net/dolfin/+bug/892714 Garth Garth > -- > Anders > > _______________________________________________ > Mailing list: https://launchpad.net/~ffc > Post to : ffc@lists.launchpad.net > Unsubscribe : https://launchpad.net/~ffc > More help : https://help.launchpad.net/ListHelp > _______________________________________________ Mailing list: https://launchpad.net/~ffc Post to : ffc@lists.launchpad.net Unsubscribe : https://launchpad.net/~ffc More help : https://help.launchpad.net/ListHelp
