test_variable.py 文件源码

def test_zerograds_fill_multi_gpu(self):
        cupy = cuda.cupy
        with cuda.get_device(1):
            a = chainer.Variable(cupy.empty(3, dtype=np.float32))
            a.grad = cupy.empty_like(a.data)
        a.zerograd()
        self.assertEqual(int(a.grad.device), 1)
        with cuda.get_device(1):
            g_expect = cupy.zeros_like(a.data)
            cupy.testing.assert_array_equal(a.grad, g_expect)