def test_noise_shape_correctness(self):
x = np.random.normal(size=(4, 16)).astype(np.float32)
dropped_rows = self.evaluate(
stateless_dropout_lib.stateless_dropout(x,
0.8,
seed=[2, 4],
noise_shape=[4, 1]))
dropped_columns = self.evaluate(
stateless_dropout_lib.stateless_dropout(x,
0.8,
seed=[2, 4],
noise_shape=[1, 16]))
self.assertBetween(np.sum(np.sum(dropped_rows, axis=-1) == 0), 1, 3)
self.assertBetween(np.sum(np.sum(dropped_columns, axis=0) == 0), 5, 15)
def f(x, seed=np.array(1, dtype=np.int32)):
if recompute_grad_lib.get_recompute_context() is not None:
seed = recompute_grad_lib.get_recompute_context().seed
return stateless_dropout_lib.stateless_dropout(model(x),
rate=0.5,
seed=tf.stack(
[seed, 0]))
def dropped_inputs():
"""Randomly drops elements of `inputs` when `training=True`."""
recompute_context = recompute_grad_lib.get_recompute_context()
if recompute_context is None:
if self.force_recomputation:
raise ValueError(
'RecomputeContext is required when force_recomputation=True.')
return tf.nn.dropout(
inputs,
noise_shape=self._get_noise_shape(inputs),
seed=self.seed,
rate=self.rate)
seed = tf.stack([recompute_context.seed, self._recompute_seed])
return stateless_dropout_lib.stateless_dropout(
inputs,
rate=self.rate,
seed=seed,
noise_shape=self._get_noise_shape(inputs))
def f(x):
if recompute_grad_lib.get_recompute_context() is None:
generator = tf.random.experimental.get_global_generator()
recompute_grad_seed = tf.stack(
(generator.uniform_full_int([], tf.int32, name='seed'), 0))
else:
recompute_grad_seed = tf.stack(
(recompute_grad_lib.get_recompute_context().seed, 0))
seeds = tf.random.stateless_uniform([len(self._units), 2],
recompute_grad_seed,
minval=-2**31,
maxval=2**31 - 1,
dtype=tf.int32,
name='dropout_seeds')
for i, (kernel, bias) in enumerate(zip(self._kernels,
self._biases)):
x = tf.nn.tanh(tf.matmul(x, kernel) + bias)
x = stateless_dropout_lib.stateless_dropout(
x, self._rate, seeds[i])
return x
def test_deterministic(self):
x = np.random.normal(size=(4, 8)).astype(np.float32)
y = self.evaluate(
stateless_dropout_lib.stateless_dropout(x, 0.5, seed=[2, 4]))
self.assertAllEqual(
stateless_dropout_lib.stateless_dropout(x, 0.5, seed=[2, 4]), y)
def test_rate_correctness(self):
x = np.random.normal(size=(4, 8)).astype(np.float32)
y = self.evaluate(
stateless_dropout_lib.stateless_dropout(x, 0.8, seed=[2, 4]))
self.assertBetween(np.sum(y == 0), 10, 31)
def test_rate_zero(self):
x = np.random.normal(size=(4, 8)).astype(np.float32)
self.assertAllEqual(
stateless_dropout_lib.stateless_dropout(x, 0, seed=[1, 0]), x)