87 lines
3.1 KiB
Python
87 lines
3.1 KiB
Python
# Copyright 2019 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.
|
|
# ==============================================================================
|
|
"""Test that we can connect to a real Cloud TPU."""
|
|
|
|
from __future__ import absolute_import
|
|
from __future__ import division
|
|
from __future__ import print_function
|
|
|
|
from absl import flags
|
|
from absl.testing import absltest
|
|
|
|
from tensorflow.python.distribute.cluster_resolver import tpu_cluster_resolver
|
|
from tensorflow.python.eager import remote
|
|
from tensorflow.python.framework import config
|
|
from tensorflow.python.tpu import tpu_strategy_util
|
|
|
|
FLAGS = flags.FLAGS
|
|
flags.DEFINE_string('tpu', '', 'Name of TPU to connect to.')
|
|
flags.DEFINE_string('project', None, 'Name of GCP project with TPU.')
|
|
flags.DEFINE_string('zone', None, 'Name of GCP zone with TPU.')
|
|
|
|
flags.DEFINE_integer('num_tpu_devices', 8, 'The expected number of TPUs.')
|
|
DEVICES_PER_TASK = 8
|
|
|
|
EXPECTED_DEVICES_PRE_CONNECT = [
|
|
'/device:CPU:0',
|
|
'/device:XLA_CPU:0',
|
|
]
|
|
EXPECTED_NEW_DEVICES_AFTER_CONNECT_TEMPLATES = [
|
|
'/job:worker/replica:0/task:{task}/device:CPU:0',
|
|
'/job:worker/replica:0/task:{task}/device:XLA_CPU:0',
|
|
'/job:worker/replica:0/task:{task}/device:TPU_SYSTEM:0',
|
|
'/job:worker/replica:0/task:{task}/device:TPU:0',
|
|
'/job:worker/replica:0/task:{task}/device:TPU:1',
|
|
'/job:worker/replica:0/task:{task}/device:TPU:2',
|
|
'/job:worker/replica:0/task:{task}/device:TPU:3',
|
|
'/job:worker/replica:0/task:{task}/device:TPU:4',
|
|
'/job:worker/replica:0/task:{task}/device:TPU:5',
|
|
'/job:worker/replica:0/task:{task}/device:TPU:6',
|
|
'/job:worker/replica:0/task:{task}/device:TPU:7',
|
|
]
|
|
|
|
|
|
class RemoteCloudTPUTest(absltest.TestCase):
|
|
"""Test that we can connect to a real Cloud TPU."""
|
|
|
|
def test_connect(self):
|
|
# Log full diff on failure.
|
|
self.maxDiff = None # pylint:disable=invalid-name
|
|
|
|
self.assertCountEqual(
|
|
EXPECTED_DEVICES_PRE_CONNECT,
|
|
[device.name for device in config.list_logical_devices()])
|
|
|
|
resolver = tpu_cluster_resolver.TPUClusterResolver(
|
|
tpu=FLAGS.tpu, zone=FLAGS.zone, project=FLAGS.project
|
|
)
|
|
remote.connect_to_cluster(resolver)
|
|
|
|
expected_devices = EXPECTED_DEVICES_PRE_CONNECT
|
|
for task in range(FLAGS.num_tpu_devices // DEVICES_PER_TASK):
|
|
expected_devices.extend([
|
|
template.format(task=task)
|
|
for template in EXPECTED_NEW_DEVICES_AFTER_CONNECT_TEMPLATES
|
|
])
|
|
|
|
self.assertCountEqual(
|
|
expected_devices,
|
|
[device.name for device in config.list_logical_devices()])
|
|
|
|
tpu_strategy_util.initialize_tpu_system(resolver)
|
|
|
|
if __name__ == '__main__':
|
|
absltest.main()
|