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Commits on Dec 23, 2018

• Disable cost tracking for async kernels.

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Commits on Dec 22, 2018

• Dynamic expensive kernel tracking.

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Commits on Dec 21, 2018

• Attach additional GRPC debug information to failed RPC calls.

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Commits on Dec 20, 2018

• ArithmeticOptimizer: Memoize computation of in-place ops.

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• Remove device capture from replay logs.

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Commits on Dec 18, 2018

• Switch back to default gRPC timeouts.

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Commits on Dec 15, 2018

• Merge status values when aggregating status from executor or multi-graph runner.

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Commits on Dec 13, 2018

• Adjust status reporting for Barrier/RunManyGraphs.

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Commits on Dec 12, 2018

• Use split_compile_and_replicate with TPUEstimator.

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Commits on Dec 11, 2018

• Tune keepalive timeouts for Tensorflow/GRPC

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Commits on Dec 10, 2018

• Add bfloat16 support to TileOp.

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Commits on Dec 8, 2018

• Use parent sessions configuration to ensure we connect to the same set of workers.

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Commits on Nov 13, 2018

• Fix the final checkpoint handling of AsyncCheckpointSaver.

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Commits on Nov 12, 2018

• Support export_savedmodel with Python 3.

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Commits on Oct 17, 2018

• Make worker heartbeats robust to shutdowns.

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• Fix triggering of asynchronous checkpoints.

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Commits on Oct 15, 2018

• Allow empty GCS tokens to be cached.

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Commits on Oct 11, 2018

• Fix Keras support in Python 3.

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• Turn on worker watchdog in TPUEstimator.

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Commits on Oct 3, 2018

• Fix filename/line number lookup for logging.

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Commits on Oct 2, 2018

• Make Keras/TPU more robust to closed TF sessions.

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• Make Keras/TPU more robust to closed TF sessions.

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Commits on Oct 1, 2018

• Make GCS filesystem/metadata lookup retries configurable

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Commits on Sep 29, 2018

• Fix bad reference to self._name in TPUEstimator infeed loop.

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Commits on Sep 28, 2018

• Add option to disable initialization/shutdown of the TPU.

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Commits on Sep 27, 2018

• Fix heartbeat probing.

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• Enable worker heartbeat polling for all available workers.

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Commits on Sep 26, 2018

• Add experimental asynchronous checkpoint hook.

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Commits on Sep 25, 2018

• Remove unneeded locks in session logging.

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Commits on Sep 20, 2018

• Implement TF graph capture.

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Commits on Aug 31, 2018

• Add experimental replicated variable support for Keras/TPU.

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Commits on Aug 16, 2018

• Ensure models can be re-run with Keras (useful for Colab).

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Commits on Aug 7, 2018

• Enable infeed enqueue, outfeed dequeue operations.

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Commits on Aug 6, 2018

• Refactor dependencies so keras_support can be imported directly.

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Commits on Aug 1, 2018

• Adjust `tpu.rewrite` comment to make it clear that returned operations will be executed as part of the program.

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