ffc team mailing list archive

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

On Tue, 2010-08-17 at 09:10 +0200, Anders Logg wrote:
> Great!
> 
> It will be interesting to see what the benchbot says tomorrow.
> 

The change broke

    demo/adaptivity/adaptive-poisson/python

Garth

> --
> Anders
> 
> 
> On Mon, Aug 16, 2010 at 08:20:35PM -0700, Johan Hake wrote:
> > Hello!
> >
> > Attached is a patch that introduce a small memory cache for preprocess forms.
> > Fixing DOLFIN bug:
> >
> >   <https://bugs.launchpad.net/dolfin/+bug/612579>
> >
> > Johan
> 
> > # Bazaar merge directive format 2 (Bazaar 0.90)
> > # revision_id: hake.dev@xxxxxxxxx-20100817031045-q3ruq4t6cv4va0b8
> > # target_branch: bzr+ssh://bazaar.launchpad.net/~ffc-core/ffc/main/
> > # testament_sha1: b1b8c7ad15349aa80c014dbab5ecea3934c3eb2f
> > # timestamp: 2010-08-16 20:13:52 -0700
> > # base_revision_id: k.b.oelgaard@xxxxxxxxx-20100724151209-\
> > #   e1egwzz4kq5ksqae
> > #
> > # Begin patch
> > === modified file 'ChangeLog'
> > --- ChangeLog	2010-07-23 17:22:13 +0000
> > +++ ChangeLog	2010-08-17 03:10:45 +0000
> > @@ -1,10 +1,11 @@
> > + - Added memory cache in jit(), for preprocessed forms
> >   - Added support for Conditional and added demo/Conditional.ufl.
> >   - Added support for new geometric quantity Circumradius in UFL.
> >   - Added support for new geometric quantity CellVolume in UFL.
> >  0.9.3 [2010-07-01]
> >   - Make global_dimension for Real return an int instead of double, bug # 592088
> >   - Add support for facet normal in 1D.
> > - - Expose -feliminate_zeros for quadrature optimisations to give user more
> > + - Expose -feliminate_zeros for quadrature optimisations to give user more
> >     control
> >   - Remove return of form in compile_form
> >   - Remove object_names argument to compile_element
> > @@ -14,7 +15,7 @@
> >   - Added support for Bubble elements
> >   - Added support for UFL.SpatialCoordinate.
> >  0.9.2 [2010-02-17]
> > - - Bug fix in removal of unused variables in Piola-mapped terms for tensor
> > + - Bug fix in removal of unused variables in Piola-mapped terms for tensor
> >     representation
> >  0.9.1 [2010-02-15]
> >   - Add back support for FErari optimizations
> >
> > === modified file 'ffc/jitcompiler.py'
> > --- ffc/jitcompiler.py	2010-02-14 22:05:02 +0000
> > +++ ffc/jitcompiler.py	2010-08-17 03:10:45 +0000
> > @@ -12,7 +12,7 @@
> >  # Last changed: 2010-02-14
> >
> >  # Python modules
> > -import os
> > +import os, sys
> >  import instant
> >  import ufc_utils
> >
> > @@ -42,6 +42,12 @@
> >  # Set debug level for Instant
> >  instant.set_logging_level("warning")
> >
> > +# Memory cache for preprocessed forms
> > +_memory_cache = {}
> > +
> > +# Counter to prevent memory leak
> > +_memory_check = 1
> > +
> >  def jit(object, parameters=None, common_cell=None):
> >      """Just-in-time compile the given form or element
> >
> > @@ -59,6 +65,7 @@
> >
> >  def jit_form(form, parameters=None, common_cell=None):
> >      "Just-in-time compile the given form."
> > +    global _memory_check
> >
> >      # Check that we get a Form
> >      if not isinstance(form, Form):
> > @@ -72,10 +79,28 @@
> >      set_prefix(parameters["log_prefix"])
> >
> >      # Preprocess form
> > -    if form.form_data() is None:
> > +
> > +    # First check if form is preprocessed
> > +    if form.form_data() is not None:
> > +        preprocessed_form = form
> > +
> > +    # Second check memory cache
> > +    elif _memory_cache.has_key(id(form)):
> > +        preprocessed_form = _memory_cache[id(form)]
> > +
> > +    # Else preprocess form and store in memory cache
> > +    else:
> >          preprocessed_form = preprocess(form, common_cell=common_cell)
> > -    else:
> > -        preprocessed_form = form
> > +        _memory_cache[id(form)] = preprocessed_form
> > +
> > +        # For each 10th time the refcount of the cached form are checked
> > +        # and superflous forms are poped
> > +        if (_memory_check % 10) == 0:
> > +            for key, cached_form in _memory_cache.items():
> > +                if sys.getrefcount(cached_form) < 6:
> > +                    _memory_cache.pop(key)
> > +        else:
> > +            _memory_check += 1
> >
> >      # Wrap input
> >      jit_object = JITObject(form, preprocessed_form, parameters)
> >
> > # Begin bundle
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> 
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