python - 函数声明时出现 Theano OSError

Question

在声明 Theano 符号函数时，我得到一个 OSError 和回溯。有趣的是，相同的代码在不同的机器上运行。一台机器配置为使用 GPU，而另一台(有错误)仅配置为 CPU。有其他人经历过这种行为并知道如何继续吗？

  File "classifiers/mlp.py", line 37, in predict
    f = theano.function([X], Y)
  File "/usr/local/lib/python2.7/dist-packages/Theano-0.6.0-py2.7.egg/theano/compile/function.py", line 223, in function
    profile=profile)
  File "/usr/local/lib/python2.7/dist-packages/Theano-0.6.0-py2.7.egg/theano/compile/pfunc.py", line 511, in pfunc
    on_unused_input=on_unused_input)
  File "/usr/local/lib/python2.7/dist-packages/Theano-0.6.0-py2.7.egg/theano/compile/function_module.py", line 1332, in orig_function
    defaults)
  File "/usr/local/lib/python2.7/dist-packages/Theano-0.6.0-py2.7.egg/theano/compile/function_module.py", line 1198, in create
    _fn, _i, _o = self.linker.make_thunk(input_storage=input_storage_lists)
  File "/usr/local/lib/python2.7/dist-packages/Theano-0.6.0-py2.7.egg/theano/gof/link.py", line 489, in make_thunk
    output_storage=output_storage)[:3]
  File "/usr/local/lib/python2.7/dist-packages/Theano-0.6.0-py2.7.egg/theano/gof/vm.py", line 882, in make_all
    no_recycling))
  File "/usr/local/lib/python2.7/dist-packages/Theano-0.6.0-py2.7.egg/theano/gof/op.py", line 618, in make_thunk
    output_storage=node_output_storage)
  File "/usr/local/lib/python2.7/dist-packages/Theano-0.6.0-py2.7.egg/theano/gof/cc.py", line 992, in make_thunk
    keep_lock=keep_lock)
  File "/usr/local/lib/python2.7/dist-packages/Theano-0.6.0-py2.7.egg/theano/gof/cc.py", line 935, in __compile__
    keep_lock=keep_lock)
  File "/usr/local/lib/python2.7/dist-packages/Theano-0.6.0-py2.7.egg/theano/gof/cc.py", line 1372, in cthunk_factory
    key=key, fn=self.compile_cmodule_by_step, keep_lock=keep_lock)
  File "/usr/local/lib/python2.7/dist-packages/Theano-0.6.0-py2.7.egg/theano/gof/cmodule.py", line 1005, in module_from_key
    module = next(compile_steps)
  File "/usr/local/lib/python2.7/dist-packages/Theano-0.6.0-py2.7.egg/theano/gof/cc.py", line 1287, in compile_cmodule_by_step
    preargs=preargs)
  File "/usr/local/lib/python2.7/dist-packages/Theano-0.6.0-py2.7.egg/theano/gof/cmodule.py", line 1962, in compile_str
    p_out = output_subprocess_Popen(cmd)
  File "/usr/local/lib/python2.7/dist-packages/Theano-0.6.0-py2.7.egg/theano/misc/windows.py", line 73, in output_subprocess_Popen
    p = subprocess_Popen(command, **params)
  File "/usr/local/lib/python2.7/dist-packages/Theano-0.6.0-py2.7.egg/theano/misc/windows.py", line 36, in subprocess_Popen
    proc = subprocess.Popen(command, startupinfo=startupinfo, **params)
  File "/usr/lib/python2.7/subprocess.py", line 679, in __init__
    errread, errwrite)
  File "/usr/lib/python2.7/subprocess.py", line 1153, in _execute_child
    self.pid = os.fork()
OSError: [Errno 12] Cannot allocate memory

Answer 1

我不确定为什么它在声明 Theano 的符号函数时被触发，但这是一个简单的内存问题。减少内存使用量解决了我的问题。