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[Siva Shankar Rudraraju <question158097@xxxxxxxxxxxxxxxxxxxxx>]

New question #158097 on DOLFIN:
https://answers.launchpad.net/dolfin/+question/158097

Hi,

While trying to solve a coupled physics problem with 9 DOF per node,  I encounter the  "OSError: [Errno 12] Cannot allocate memory" during solver.solve() function call. Given that there are only 30,000 DOF in the system, I am not sure how a LU factorization (mumps) step can run out of memory on a 24GB RAM system (and Xeon processor with 12MB L3 cache). Is this possibly a memory leak?.

I am copying the error trace below. 

Thanks,
Shiva Rudraraju

Process 3: Applying boundary conditions to linear system.
  Process 0: Applying boundary conditions to linear system.
  Process 0: Applying boundary conditions to linear system.
Traceback (most recent call last):
  File "tumor11.py", line 346, in <module>
    solver.solve(problem, uc.vector())
  File "tumor11.py", line 72, in J
    form_compiler_parameters=self.ffc_parameters)
  File "/home/rudraa/Work/FEniCS/dev/lib/python2.6/site-packages/dolfin/fem/assemble.py", line 100, in assemble
    common_cell=common_cell)
  File "/home/rudraa/Work/FEniCS/dev/lib/python2.6/site-packages/dolfin/fem/form.py", line 34, in __init__
    (self._compiled_form, module, self.form_data) = jit(form, form_compiler_parameters, common_cell)
  File "/home/rudraa/Work/FEniCS/dev/lib/python2.6/site-packages/dolfin/compilemodules/jit.py", line 51, in mpi_jit
    output = local_jit(*args, **kwargs)
  File "/home/rudraa/Work/FEniCS/dev/lib/python2.6/site-packages/dolfin/compilemodules/jit.py", line 114, in jit
    return jit_compile(form, parameters=p, common_cell=common_cell)
  File "/home/rudraa/Work/FEniCS/dev/lib/python2.6/site-packages/ffc/jitcompiler.py", line 64, in jit
    return jit_form(object, parameters, common_cell)
  File "/home/rudraa/Work/FEniCS/dev/lib/python2.6/site-packages/ffc/jitcompiler.py", line 113, in jit_form
    module = instant.import_module(jit_object, cache_dir=cache_dir)
  File "/home/rudraa/Work/FEniCS/dev/lib/python2.6/site-packages/instant/cache.py", line 149, in import_module
    module, moduleids = check_memory_cache(moduleid)
  File "/home/rudraa/Work/FEniCS/dev/lib/python2.6/site-packages/instant/cache.py", line 81, in check_memory_cache
    moduleid = moduleid.signature()
  File "/home/rudraa/Work/FEniCS/dev/lib/python2.6/site-packages/ffc/jitobject.py", line 66, in signature
    swig_signature    = str(get_swig_version())
  File "/home/rudraa/Work/FEniCS/dev/lib/python2.6/site-packages/instant/config.py", line 10, in get_swig_version
    result, output = get_status_output("swig -version")
  File "/home/rudraa/Work/FEniCS/dev/lib/python2.6/site-packages/instant/output.py", line 72, in get_status_output
    pipe = Popen(cmd, shell=True, cwd=cwd, env=env, stdout=PIPE, stderr=STDOUT)
  File "/usr/lib/python2.6/subprocess.py", line 633, in __init__
    errread, errwrite)
  File "/usr/lib/python2.6/subprocess.py", line 1049, in _execute_child
    self.pid = os.fork()
OSError: [Errno 12] Cannot allocate memory




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