def test_returns_start_lr_when_there_are_no_metrics(self):
history = trax_history.History()
start_lr = 1e-3
schedule = self._make_schedule(
history,
control_configs=(("learning_rate", start_lr, (1e-9, 1.0), False),),
)
self.assertEqual(schedule(0)["learning_rate"], start_lr)
def test_clips_observations(self):
history = trax_history.History()
self._append_metrics(history, ("eval", "loss"), [-10, 10])
observations = online_tune.history_to_observations(
history,
metrics=(("eval", "loss"), ),
observation_range=(-2, 2),
include_lr=False,
)
np.testing.assert_array_equal(observations, [[-2], [2]])
def restore_state(output_dir):
"""Restore State."""
params_file = os.path.join(output_dir, "model.pkl")
if not gfile.exists(params_file):
return State(step=None, params=None, history=trax_history.History())
with gfile.GFile(params_file, "rb") as f:
(params, step, history) = pickle.load(f)
log("Model loaded from %s" % params_file)
return State(step=step, params=params, history=history)
def test_clips_observations(self):
history = trax_history.History()
self._append_metrics(history, ("eval", "loss"), [-10, 10])
observations = online_tune.history_to_observations(
history,
metrics=(("eval", "loss"), ),
observation_range=(-2, 2),
control_configs=None,
)
np.testing.assert_array_equal(observations, [[-1], [1]])
def test_clips_new_learning_rate(self):
history = trax_history.History()
self._append_metrics(history, online_tune.LEARNING_RATE_METRIC, [1e-3])
new_lr = online_tune.new_learning_rate(
action=0,
history=history,
action_multipliers=(4.0, 1.0, 0.25),
max_lr=3e-3,
)
np.testing.assert_almost_equal(new_lr, 3e-3)
def test_calculates_new_learning_rate(self):
history = trax_history.History()
self._append_metrics(history, online_tune.LEARNING_RATE_METRIC,
[1e-2, 1e-3])
new_lr = online_tune.new_learning_rate(
action=2,
history=history,
action_multipliers=(0.5, 1.0, 2.0),
max_lr=1.0,
)
np.testing.assert_almost_equal(new_lr, 2e-3)
def test_changes_lr_when_there_are_some_metrics(self):
history = trax_history.History()
history.append("eval", "metrics/accuracy", step=0, value=0.8)
history.append(*online_tune.LEARNING_RATE_METRIC, step=0, value=1e-4)
schedule = self._make_schedule(
history,
observation_metrics=(("eval", "metrics/accuracy"),),
action_multipliers=(0.5, 2.0),
)
self.assertTrue(
onp.allclose(schedule(123), 5e-5) or onp.allclose(schedule(123), 2e-4))
def restore_state(output_dir):
"""Restore State."""
params_file = os.path.join(output_dir, "model.pkl")
if not gfile.exists(params_file):
return State(step=None, opt_state=None, history=trax_history.History())
with gfile.GFile(params_file, "rb") as f:
(opt_state, step, history) = pickle.load(f)
log("Model loaded from %s at step %d" % (params_file, step))
logging.debug("From loaded model : history = %s", history)
return State(step=step, opt_state=OptState(*opt_state), history=history)
def test_converts_history_to_observations_without_learning_rate(self):
history = trax_history.History()
self._append_metrics(history, ("train", "loss"), [3.0, 1.07])
self._append_metrics(history, ("eval", "accuracy"), [0.12, 0.68])
observations = online_tune.history_to_observations(
history,
metrics=(("eval", "accuracy"), ("train", "loss")),
observation_range=(0, 5),
include_lr=False,
)
np.testing.assert_array_equal(observations,
[[0.12, 3.0], [0.68, 1.07]])
def test_converts_history_to_observations_without_controls(self):
history = trax_history.History()
self._append_metrics(history, ("train", "loss"), [1.0, 0.07])
self._append_metrics(history, ("eval", "accuracy"), [0.12, 0.68])
observations = online_tune.history_to_observations(
history,
metrics=(("eval", "accuracy"), ("train", "loss")),
observation_range=(-1, 1),
control_configs=None,
)
np.testing.assert_array_almost_equal(observations,
[[0.12, 1.0], [0.68, 0.07]])
def test_clips_updated_control_with_flipping(self):
config = ("momentum", None, (0.5, 0.99), True)
history = trax_history.History()
self._append_metrics(history, online_tune.control_metric("momentum"),
[0.985])
new_control = online_tune.update_control(
control_config=config,
action=0,
history=history,
action_multipliers=(0.5, 1.0, 2.0),
)
np.testing.assert_almost_equal(new_control, 0.99)
def test_clips_updated_control_without_flipping(self):
config = ("learning_rate", None, (1e-9, 10.0), False)
history = trax_history.History()
self._append_metrics(history,
online_tune.control_metric("learning_rate"),
[7.0])
new_control = online_tune.update_control(
control_config=config,
action=2,
history=history,
action_multipliers=(0.5, 1.0, 2.0),
)
np.testing.assert_almost_equal(new_control, 10.0)
def test_converts_history_to_observations_with_learning_rate(self):
history = trax_history.History()
self._append_metrics(history, ("train", "training/learning_rate"),
[1e-3, 1e-4])
observations = online_tune.history_to_observations(
history,
metrics=(),
observation_range=(0, 5),
include_lr=True,
)
self.assertEqual(observations.shape, (2, 1))
((log_lr_1, ), (log_lr_2, )) = observations
self.assertGreater(log_lr_1, log_lr_2)
def test_converts_history_to_observations_with_controls(self):
history = trax_history.History()
self._append_metrics(history, ("train", "training/learning_rate"),
[1e-3, 1e-4])
observations = online_tune.history_to_observations(
history,
metrics=(),
observation_range=(0, 5),
control_configs=(("learning_rate", None, (1e-9, 10.0), False), ),
)
self.assertEqual(observations.shape, (2, 1))
((log_lr_1, ), (log_lr_2, )) = observations
self.assertGreater(log_lr_1, log_lr_2)
def test_changes_lr_when_there_are_some_metrics(self):
history = trax_history.History()
history.append("eval", "metrics/accuracy", step=0, value=0.8)
history.append(*online_tune.control_metric("learning_rate"),
step=0,
value=1e-4)
schedule = self._make_schedule(
history,
observation_metrics=(("eval", "metrics/accuracy"), ),
action_multipliers=(0.5, 2.0),
)
new_lr = schedule(123)["learning_rate"]
self.assertTrue(
onp.allclose(new_lr, 5e-5) or onp.allclose(new_lr, 2e-4))
def test_works_with_multiple_controls(self):
history = trax_history.History()
history.append("eval", "metrics/accuracy", step=0, value=0.8)
history.append(
*online_tune.control_metric("learning_rate"), step=0, value=1e-4
)
history.append(
*online_tune.control_metric("weight_decay_rate"), step=0, value=1e-5
)
schedule = self._make_schedule(
history,
observation_metrics=(("eval", "metrics/accuracy"),),
control_configs=(
("learning_rate", 1e-3, (1e-9, 1.0), False),
("weight_decay_rate", 1e-5, (1e-9, 1.0), False),
),
action_multipliers=(1.0,),
)
new_controls = schedule(123)
self.assertIn("learning_rate", new_controls)
self.assertIn("weight_decay_rate", new_controls)
def test_returns_start_lr_when_there_are_no_metrics(self):
history = trax_history.History()
schedule = self._make_schedule(history, start_lr=1e-3)
self.assertEqual(schedule(0), 1e-3)
def test_retrieves_historical_metric_values(self):
history = trax_history.History()
self._append_metrics(history, ("train", "accuracy"), [0.1, 0.73])
metric_values = online_tune.historical_metric_values(
history, metric=("train", "accuracy"), observation_range=(0, 5))
np.testing.assert_array_equal(metric_values, [0.1, 0.73])
def test_clips_historical_metric_values(self):
history = trax_history.History()
self._append_metrics(history, ("train", "loss"), [-10, 10])
metric_values = online_tune.historical_metric_values(
history, metric=("train", "loss"), observation_range=(-1, 1))
np.testing.assert_array_equal(metric_values, [-1, 1])
