Commit b428d3a8 authored by Jeremy Lau's avatar Jeremy Lau Committed by TensorFlower Gardener
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TPUEstimator: Run tpu.initialize_system in a separate graph. This speeds up 

initialization by avoiding unnecessary graph processing.

Resubmit with a fix for eval initialization. For eval, the master is
self._config.evaluation_master, not self._config.master.

PiperOrigin-RevId: 224232149
parent 3fd6efc9
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