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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