CrossReplicaSum

public final class CrossReplicaSum

An Op to sum inputs across replicated TPU instances.

Each instance supplies its own input.

For example, suppose there are 8 TPU instances: `[A, B, C, D, E, F, G, H]`. Passing group_assignment=`[[0,2,4,6],[1,3,5,7]]` sets `A, C, E, G` as group 0, and `B, D, F, H` as group 1. Thus we get the outputs: `[A+C+E+G, B+D+F+H, A+C+E+G, B+D+F+H, A+C+E+G, B+D+F+H, A+C+E+G, B+D+F+H]`.

Public Methods

Output <T>	asOutput () Returns the symbolic handle of a tensor.
static <T extends Number> CrossReplicaSum <T>	create ( Scope scope, Operand <T> input, Operand <Integer> groupAssignment) Factory method to create a class wrapping a new CrossReplicaSum operation.
Output <T>	output () The sum of all the distributed inputs.

Inherited Methods

From class org.tensorflow.op.PrimitiveOp

final boolean	equals (Object obj)
final int	hashCode ()
Operation	op () Returns the underlying Operation
final String	toString ()

From class java.lang.Object

boolean	equals (Object arg0)
final Class<?>	getClass ()
int	hashCode ()
final void	notify ()
final void	notifyAll ()
String	toString ()
final void	wait (long arg0, int arg1)
final void	wait (long arg0)
final void	wait ()

From interface org.tensorflow.Operand

abstract Output <T>

asOutput () Returns the symbolic handle of a tensor.

Public Methods

public Output <T> asOutput ()

Returns the symbolic handle of a tensor.

Inputs to TensorFlow operations are outputs of another TensorFlow operation. This method is used to obtain a symbolic handle that represents the computation of the input.

public static CrossReplicaSum <T> create ( Scope scope, Operand <T> input, Operand <Integer> groupAssignment)

Factory method to create a class wrapping a new CrossReplicaSum operation.

Parameters

scope	current scope
input	The local input to the sum.
groupAssignment	An int32 tensor with shape [num_groups, num_replicas_per_group]. `group_assignment[i]` represents the replica ids in the ith subgroup.

Returns

• a new instance of CrossReplicaSum

public Output <T> output ()

The sum of all the distributed inputs.