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Commits on Mar 19, 2020

• Fix OSS TPUClusterResolver get_tpu_system_metadata method.

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• Add get_tpu_system_metadata API to TPUClusterResolver. Also export tf.tpu.experimental.TPUSystemMetadata and tf.tpu.experimental.Topology symbols.

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Commits on Feb 28, 2020

• Add finer grained check of dynamic shape inputs even maximum_shapes is set in tpu.replicate.

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Commits on Feb 27, 2020

• Add finer grained check of dynamic shape inputs even maximum_shapes is set in tpu.replicate.

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Commits on Feb 20, 2020

• Make TPUStrategy work with tf.function(experimental_compile=True). This involves two changes:

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Commits on Feb 14, 2020

• Add a padding_spec argument into tpu.replicate, which provides the functionality of auto bucketing inputs.

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Commits on Feb 13, 2020

• Add auto control dependencies for TPU collective ops.

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• Extend tf.train.CheckpointManager functionality:

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Commits on Feb 7, 2020

• Fix calling tf.identity on SyncOnReadVariable in cross replica context.

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Commits on Feb 5, 2020

• Make sure SyncOnReadVariable.numpy() outside of strategy.scope() triggers

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Commits on Jan 9, 2020

• Fix the issue that TPUStrategy may error out if the value passed into strategy.reduce is an integer.

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Commits on Jan 7, 2020

• Create shadow variables of EMA in init_scope, so it can be supported in TPUStrategy.

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Commits on Dec 19, 2019

• Fix a bug for TPUStrategy with nested output.

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Commits on Dec 18, 2019

• Improve TPUStrategy in pure eager mode error message.

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Commits on Dec 6, 2019

• Throw an explicit error if user call TPUStrategy experimental_run_v2 in eager mode with a python function.

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Commits on Dec 2, 2019

• Throw an explicit error if user call TPUStrategy experimental_run_v2 in eager mode with a python function.

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Commits on Nov 21, 2019

• Fix nested function inside XLA context.

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• Add CompositeTensor support for DistributedIterator.

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Commits on Nov 15, 2019

• Fix a bug that if all the input shapes to TPUStrategy.experimental_run_v2 is static, it always uses the shape from first replica to pad. But it may fail if the first replica shape is not the maximu…

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Commits on Nov 12, 2019

• Throw an explicit error if tf.config.experimental_connect_to_cluster is not running on eager mode.

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• Add XLA context to the function cache key, so nested tf.function can be supported in TPUStrategy.

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Commits on Nov 7, 2019

• Workaround to set the keep_alive_secs to very long to avoid the deadlock.

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Commits on Nov 5, 2019

• Don't throw an error if calling tf.config.experimental_connect_to_cluster on local master.

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Commits on Nov 2, 2019

• Don't use the device stack from outer graph if inside a function within TPUStrategy scope.

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Commits on Oct 30, 2019

• Support restoring on creation for Sonnet model with TPUReplicator.

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Commits on Oct 25, 2019

• Don't shut down TPU chips if compilation fails in TF2.

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Commits on Oct 23, 2019

• Improve the "destroying remote tensor handle" error message and change it to a warning.

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Commits on Oct 19, 2019

• Also propagate is_mirrored annotation for ONLY_FIRST_REPLICA TPUMirroredVariable.

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Commits on Oct 18, 2019

• Avoid re-evaluating batch_size in BatchDataset. This will help the startup time performance in remote eager, as each evaluation is underlying calling EagerTensor.numpy(), which is a blocking point.

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Commits on Oct 15, 2019

• Fix TPUStrategy experimental_local_results may cause outputs in disorder, if the alphabetical order and the actual order of devices are different.

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Commits on Oct 11, 2019

• Allow calling tf.config.experimental_connect_to_cluster multiple times.

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Commits on Oct 10, 2019

• Only propagate "is_mirrored_variable" tag for mirrored variables which values are guaranteed to be the same all the time.

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Commits on Oct 4, 2019

• Refine the client-server version mismatch error message.

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Commits on Oct 3, 2019

• Improves function tracing time of variables created inside functions. In _initialize_uninitialized_variables, pack all variable_is_initialized ops into one tensor and convert it to numpy in one cal…

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Commits on Oct 2, 2019

• Add an escape path for people to skip dynamic padding in TPUStrategy.

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