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Remove num_cores from the TPU Strategy constructor as that is not supported or correct.

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PiperOrigin-RevId: 226396428
This commit is contained in:
Sourabh Bajaj 2018-12-20 14:44:36 -08:00 committed by TensorFlower Gardener
parent 0c31fca446
commit 795f9cbf91
1 changed files with 4 additions and 10 deletions
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14
tensorflow/contrib/distribute/python/tpu_strategy.py
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@ -126,8 +126,7 @@ class TPUStrategy(distribute_lib.DistributionStrategy):
def __init__(self,
tpu_cluster_resolver=None,
steps_per_run=None,
num_cores=None):
steps_per_run=None):
"""Initializes the TPUStrategy object.
Args:
@ -138,11 +137,9 @@ class TPUStrategy(distribute_lib.DistributionStrategy):
metrics, summaries etc.
This parameter is only used when Distribution Strategy is used with
estimator or keras.
num_cores: Number of cores to use on the TPU. If None specified, then
auto-detect the cores and topology of the TPU system.
"""
super(TPUStrategy, self).__init__(TPUExtended(
self, tpu_cluster_resolver, steps_per_run, num_cores))
self, tpu_cluster_resolver, steps_per_run))
@property
def steps_per_run(self):
@ -161,8 +158,7 @@ class TPUExtended(distribute_lib.DistributionStrategyExtended):
def __init__(self,
container_strategy,
tpu_cluster_resolver=None,
steps_per_run=None,
num_cores=None):
steps_per_run=None):
super(TPUExtended, self).__init__(container_strategy)
if tpu_cluster_resolver is None:
@ -175,8 +171,6 @@ class TPUExtended(distribute_lib.DistributionStrategyExtended):
self._tpu_cluster_resolver = tpu_cluster_resolver
self._tpu_metadata = get_tpu_system_metadata(self._tpu_cluster_resolver)
# TODO(sourabhbajaj): Change this from num_cores to metadata_override
self._num_cores_override = num_cores
# TODO(jhseu): Switch to DeviceAssignment to support pods and model
# parallelism.
@ -570,7 +564,7 @@ class TPUExtended(distribute_lib.DistributionStrategyExtended):
@property
def _num_replicas_in_sync(self):
return self._num_cores_override or self._tpu_metadata.num_cores
return self._tpu_metadata.num_cores
@property
def experimental_between_graph(self):