dolfin team mailing list archive

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

Johan Hake wrote:
> On Friday 12 February 2010 13:06:00 Garth N. Wells wrote:
>> Garth N. Wells wrote:
>>> I've tracked a leak in the Python interface down to the line:
>>>
>>>   # Initialize base class
>>>   cpp.Form.__init__(self, self._compiled_form, self.function_spaces,
>>> self.coefficients)
>>>
>>> on line 46 of form.py. If I do
>>>
>>>   cpp.Form.__init__(self, self._compiled_form, self.function_spaces, [])
>>>
>>> then there is no observable leak. Any ideas? I checked dolfin::Form it
>>> it looks ok. I even commented out all code in the dolfin::Form
>>> constructor to be sure.
>> Could the problem be in the SWIG wrapper for std::vector? The line
>>
>>     res = SWIG_ConvertPtrAndOwn(py_item, &itemp,
>> $descriptor(dolfin::TYPE *), 0, &newmem);
>>
>> looks suspicious. Johan?
> 
> I can have a look at it. I see that you have reported a bug.
> 

Yes, I dug deep enough that I could identify the problem precisely
enough for a bug report, but I couldn't fix it.

Garth


> Johan
> 
>> Garth
>>
>>> Below is the script that I've been testing with.
>>>
>>> Garth
>>>
>>>
>>> from dolfin import *
>>> parameters["form_compiler"]["cpp_optimize"] = True
>>> parameters["form_compiler"]["optimize"] = True
>>> mesh = UnitSquare(16, 16)
>>> for t in xrange(20000):
>>>     for level in xrange(100):
>>>         V  = FunctionSpace(mesh, "CG", 1)
>>>         v  = TestFunction(V)
>>>         u  = Function(V)
>>>         u0 = Function(V)
>>>         L = v*(u-u0)*dx
>>>         b = assemble(L)
>>>     print "----"
>>>
>>>
>>>
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