64 lines
1.9 KiB
Python
64 lines
1.9 KiB
Python
# Copyright 2018 The TensorFlow Authors. All Rights Reserved.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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# ==============================================================================
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"""Tests for lock_util."""
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from __future__ import absolute_import
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from __future__ import division
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from __future__ import print_function
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import random
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import time
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from absl.testing import parameterized
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from tensorflow.python.platform import test
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from tensorflow.python.util import lock_util
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class GroupLockTest(test.TestCase, parameterized.TestCase):
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@parameterized.parameters(1, 2, 3, 5, 10)
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def testGroups(self, num_groups):
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lock = lock_util.GroupLock(num_groups)
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num_threads = 10
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finished = set()
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def thread_fn(thread_id):
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time.sleep(random.random() * 0.1)
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group_id = thread_id % num_groups
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with lock.group(group_id):
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time.sleep(random.random() * 0.1)
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self.assertGreater(lock._group_member_counts[group_id], 0)
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for g, c in enumerate(lock._group_member_counts):
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if g != group_id:
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self.assertEqual(0, c)
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finished.add(thread_id)
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threads = [
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self.checkedThread(target=thread_fn, args=(i,))
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for i in range(num_threads)
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]
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for i in range(num_threads):
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threads[i].start()
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for i in range(num_threads):
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threads[i].join()
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self.assertEqual(set(range(num_threads)), finished)
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if __name__ == "__main__":
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test.main()
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