| # 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. | |
| # ============================================================================== | |
| """Initializes TPU system for TF 2.0.""" | |
| import tensorflow as tf | |
| def tpu_initialize(tpu_address): | |
| """Initializes TPU for TF 2.0 training. | |
| Args: | |
| tpu_address: string, bns address of master TPU worker. | |
| Returns: | |
| A TPUClusterResolver. | |
| """ | |
| cluster_resolver = tf.distribute.cluster_resolver.TPUClusterResolver( | |
| tpu=tpu_address) | |
| if tpu_address not in ('', 'local'): | |
| tf.config.experimental_connect_to_cluster(cluster_resolver) | |
| tf.tpu.experimental.initialize_tpu_system(cluster_resolver) | |
| return cluster_resolver | |