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This would match the behavior described in on_batch_end() functions in Keras callback.
See https://www.tensorflow.org/api_docs/python/tf/keras/callbacks/Callback.

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Remove train_data_size flag

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Change summary directory and model checkpoint directory so that training via Keras Compile/Fit() and custom training loop is consistent.

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Refactor basic utils to modeling/

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add a flag to control loss scaling.

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262178259  by hongkuny<hongkuny@google.com>:

    We should call training=True in CTL train step.

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262081759  by akuegel<akuegel@google.com>:

    Internal change

PiperOrigin-RevId: 262178259

261786323  by yanhuasun<yanhuasun@google.com>:

    Replace set, dict with ObjectIdentityDict/Set to prepare for eq implementation

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PiperOrigin-RevId: 261786323

260060237  by zongweiz<zongweiz@google.com>:

    [BERT SQuAD] Enable mixed precision training

    Add mixed precision training support for BERT SQuAD model. Using the experimental Keras mixed precision API. For numeric stability, use fp32 for layer normalization, dense layers with GELU activation, etc.

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PiperOrigin-RevId: 260060237

259889221  by hongkuny<hongkuny@google.com>:

    Add no ds / xla / eager perfzero tests

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PiperOrigin-RevId: 259889221

259649972  by hongkuny<hongkuny@google.com>:

    Update docs.

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259470074  by hongkuny<hongkuny@google.com>:

    Adds a dedup phase for trainable variables.

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PiperOrigin-RevId: 259649972

* Merged commit includes the following changes:
258867180  by jingli<jingli@google.com>:

    Add new folders for upcoming reorg in model garden.

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258893811  by hongkuny<hongkuny@google.com>:

    Adds summaries for metrics, allowing metrics inside keras.model.

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258893048  by isaprykin<isaprykin@google.com>:

    Remove the `cloning` argument to `compile()`.

    Keras models are distributed by cloning in graph mode and without cloning in eager mode as of the change # 258652546.

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258881002  by hongkuny<hongkuny@google.com>:

    Fix lint.

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258874998  by hongkuny<hongkuny@google.com>:

    Internal

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258872662  by hongkuny<hongkuny@google.com>:

    Fix doc

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PiperOrigin-RevId: 258867180

* Create __init__.py

* Update __init__.py

* Update __init__.py

* Update __init__.py

258208153  by hongkuny<hongkuny@google.com>:

    Adds run_eagerly option for bert.

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PiperOrigin-RevId: 258208153

257883986  by hongkuny<hongkuny@google.com>:

    Adds tf.summary for bert training

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PiperOrigin-RevId: 257883986

254785517  by A. Unique TensorFlower<gardener@tensorflow.org>:

    Use train_single_step for BERT GPU models to temporarily work around some performance bugs in GPU runs

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254497647  by hongkuny<hongkuny@google.com>:

    Fix device placement for TPU export model.

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PiperOrigin-RevId: 254785517

254069984  by hongkuny<hongkuny@google.com>:
    Automated rollback of changelist 254060732.

254061429  by hongkuny<hongkuny@google.com>:

    Use host while loop for training steps.

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254060732  by yifeif<yifeif@google.com>:
    Automated rollback of changelist 254027750.

254027750  by hongkuny<hongkuny@google.com>:

    Internal change

PiperOrigin-RevId: 254069984

253850824  by hongkuny<hongkuny@google.com>:

    Improve bert training utils.

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253818191  by hongkuny<hongkuny@google.com>:

    Update savedmodel export to use new model.save() api.

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PiperOrigin-RevId: 253850824

252697519 by dmchen<dmchen@google.com>:

        BERT SQuAD accuracy test

25266352 by hongjunchoi<hongjunchoi@google.com>:

        Internal change

252647871 by hongjunchoi<hongjunchoi@google.com>:

        Enable multi worker TPU training for BERT pretraining.

252522861  by hongkuny<hongkuny@google.com>:

    Remove export using trained model due to implementation error

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252156812  by yuefengz<yuefengz@google.com>:

    Fix the callback method name in BERT: replaced on_batch_start with on_batch_begin. Without the fix, it won't work with Keras callbacks.

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251782065  by A. Unique TensorFlower<gardener@tensorflow.org>:

    Internal change

PiperOrigin-RevId: 252522861

251681245  by hongkuny<hongkuny@google.com>:

    Update bert to use the new tf.distribute APIs

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251575972  by A. Unique TensorFlower<gardener@tensorflow.org>:

    Remove `steps_per_run` when instantiating TPUStrategy.

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PiperOrigin-RevId: 251681245

250606180  by A. Unique TensorFlower<gardener@tensorflow.org>:

    Fix BERT benchamrk test errors.

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250589623  by A. Unique TensorFlower<gardener@tensorflow.org>:

    Change BERT benchmark test pretrained checkpoint url.

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250587892  by A. Unique TensorFlower<gardener@tensorflow.org>:

    Fix error in BERT custom training loop checkpoint restoration.

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250577163  by A. Unique TensorFlower<gardener@tensorflow.org>:

    Add logic to inject callback that measures performance in BERT custom training
    loop.

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250529526  by hongkuny<hongkuny@google.com>:

    Internal clean up

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250428976  by hongkuny<hongkuny@google.com>:

    Internal change

250415383  by A. Unique TensorFlower<gardener@tensorflow.org>:

    Add min/max value to BERT classifier benchmark test.

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250376246  by A. Unique TensorFlower<gardener@tensorflow.org>:

    Add benchmark performance test to run BERT on multiple numbers of GPUs.

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PiperOrigin-RevId: 250606180