code: def test_reentrant_total_bytes(self):
      f = self.f
      g = functions.math.identity.Identity()
  
      self.h.backward_preprocess(f, (self.x,), (self.gy,))
      self.h.forward_preprocess(g, (self.x,))
      self.h._memory_hook.used_bytes += 512
      self.h._memory_hook.acquired_bytes += 512
      self.h.forward_postprocess(g, (self.x,))
      self.h._memory_hook.used_bytes += 512
      self.h._memory_hook.acquired_bytes += 512
      self.h.backward_postprocess(f, (self.x,), (self.gy,))
  
      self.assertEqual(self.h.total_used_bytes(), 1024)
      self.assertEqual(self.h.total_acquired_bytes(), 1024)
  
imports: import unittest
  import numpy
  import six
  import chainer
  from chainer.backends import cuda
  from chainer import function_hooks
  from chainer import functions
  from chainer.functions.math import basic_math
  from chainer import testing
  from chainer.testing import attr
label_desc: Use image node_id 8 for calling the TestCupyMemoryProfileHookToFunction obj's underlying member method code with example usage: obj.test_reentrant_total_bytes() without return types