test_variable.py 文件源码

def test_to_gpu_from_another_gpu(self):
        cp = cuda.cupy
        a = chainer.Variable(cp.zeros(3, dtype=np.float32))
        a.grad = cuda.cupy.ones_like(a.data)
        b = a.data.copy()
        gb = a.grad.copy()
        a.to_gpu(1)

        self.assertEqual(int(cuda.get_device(a.data)), 1)
        self.assertEqual(int(cuda.get_device(a.grad)), 1)
        cp.testing.assert_array_equal(a.data, b)
        cp.testing.assert_array_equal(a.grad, gb)