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# Copyright 2018 The TensorFlow Authors. All Rights Reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
# ==============================================================================
""" Tests for distribution util functions."""
from __future__ import absolute_import
from __future__ import division
from __future__ import print_function
import tensorflow.compat.v2 as tf
from official.utils.misc import distribution_utils
class GetDistributionStrategyTest(tf.test.TestCase):
"""Tests for get_distribution_strategy."""
def test_one_device_strategy_cpu(self):
ds = distribution_utils.get_distribution_strategy(num_gpus=0)
self.assertEquals(ds.num_replicas_in_sync, 1)
self.assertEquals(len(ds.extended.worker_devices), 1)
self.assertIn('CPU', ds.extended.worker_devices[0])
def test_one_device_strategy_gpu(self):
ds = distribution_utils.get_distribution_strategy(num_gpus=1)
self.assertEquals(ds.num_replicas_in_sync, 1)
self.assertEquals(len(ds.extended.worker_devices), 1)
self.assertIn('GPU', ds.extended.worker_devices[0])
def test_mirrored_strategy(self):
ds = distribution_utils.get_distribution_strategy(num_gpus=5)
self.assertEquals(ds.num_replicas_in_sync, 5)
self.assertEquals(len(ds.extended.worker_devices), 5)
for device in ds.extended.worker_devices:
self.assertIn('GPU', device)
if __name__ == "__main__":
tf.test.main()
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