94 lines
3.2 KiB
Python
94 lines
3.2 KiB
Python
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# Copyright 2017 The TensorFlow Authors. All Rights Reserved.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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# ==============================================================================
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"""A python interface for Grappler items."""
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from __future__ import absolute_import
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from __future__ import division
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from __future__ import print_function
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from tensorflow.core.grappler.costs import op_performance_data_pb2
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from tensorflow.core.protobuf import meta_graph_pb2
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from tensorflow.python import pywrap_tensorflow as tf_item
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from tensorflow.python.framework import errors
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class Item(object):
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"""GrapplerItem."""
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def __init__(self,
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metagraph,
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ignore_colocation=True,
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ignore_user_placement=False):
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"""Creates an Item.
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Args:
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metagraph: a TensorFlow metagraph.
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ignore_colocation: if set, the tool will ignore all the colocation
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constraints generated by TensorFlow.
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ignore_user_placement: if set, all the placement annotations annotated in
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the metagraph will be ignored.
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Raises:
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ValueError: the metagraph is incomplete or invalid.
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"""
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self._metagraph = metagraph
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self._item_graph = meta_graph_pb2.MetaGraphDef()
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self._item_graph.CopyFrom(metagraph)
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self._ignore_colocation = ignore_colocation
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self._ignore_user_placement = ignore_user_placement
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self._tf_item = None
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self._BuildTFItem()
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def IdentifyImportantOps(self, sort_topologically=False):
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return tf_item.TF_IdentifyImportantOps(self.tf_item, sort_topologically)
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def GetOpProperties(self):
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ret_from_swig = tf_item.TF_GetOpProperties(self.tf_item)
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properties = {}
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for key, values in ret_from_swig.items():
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prop = []
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for value in values:
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prop.append(
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op_performance_data_pb2.OpInfo.TensorProperties.FromString(value))
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properties[key] = prop
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return properties
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def GetColocationGroups(self):
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"""Return a list of hard colocation constraints.
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All the nodes in a colocation tuple must be placed on the same device for
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the model to work.
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Returns:
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A list of colocation tuples.
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"""
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return tf_item.TF_GetColocationGroups(self.tf_item)
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@property
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def metagraph(self):
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return self._metagraph
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@property
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def tf_item(self):
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if self._item_graph != self._metagraph:
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self._BuildTFItem()
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self._item_graph.CopyFrom(self._metagraph)
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return self._tf_item
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def _BuildTFItem(self):
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with errors.raise_exception_on_not_ok_status() as status:
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self._tf_item = tf_item.TF_NewItem(self._metagraph.SerializeToString(),
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self._ignore_colocation,
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self._ignore_user_placement, status)
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