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distributed_test.py
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distributed_test.py
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# Copyright 2022 Google LLC
#
# 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
#
# https://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.
import threading
import unittest
from absl.testing import absltest
from absl.testing import parameterized
import jax
from jax.config import config
import jax._src.distributed as distributed
import jax._src.lib
from jax._src import test_util as jtu
try:
import portpicker
except ImportError:
portpicker = None
config.parse_flags_with_absl()
@unittest.skipIf(jax._src.lib.xla_extension_version < 73,
"Test requires jaxlib 0.3.12 or newer.")
@unittest.skipIf(not portpicker, "Test requires portpicker")
class DistributedTest(jtu.JaxTestCase):
def testInitializeAndShutdown(self):
# Tests the public APIs. Since they use global state, we cannot use
# concurrency to simulate multiple tasks.
port = portpicker.pick_unused_port()
jax.distributed.initialize(coordinator_address=f"localhost:{port}",
num_processes=1,
process_id=0)
jax.distributed.shutdown()
@parameterized.parameters([1, 2, 4])
def testConcurrentInitializeAndShutdown(self, n):
port = portpicker.pick_unused_port()
def task(i):
# We can't call the public APIs directly because they use global state.
state = distributed.State()
state.initialize(coordinator_address=f"localhost:{port}",
num_processes=n,
process_id=i)
state.shutdown()
threads = [threading.Thread(target=task, args=(i,)) for i in range(n)]
for thread in threads:
thread.start()
for thread in threads:
thread.join()
if __name__ == "__main__":
absltest.main(testLoader=jtu.JaxTestLoader())