Traceback (most recent call last):
  File "<string>", line 1, in <module>
  File "/tmp/gem5.ali/src/python/m5/main.py", line 357, in main
    exec filecode in scope
  File "tests/run.py", line 70, in <module>
    execfile(joinpath(tests_root, 'configs', test_filename + '.py'))
  File "tests/configs/realview-simple-atomic-dual.py", line 86, in <module>
    system.l2c.num_cpus = 2
  File "/tmp/gem5.ali/src/python/m5/SimObject.py", line 725, in __setattr__
    % (self.__class__.__name__, attr)
AttributeError: Class L2 has no parameter num_cpus