tf.compat.v1.tpu.cross_replica_sum

Sum the input tensor across replicas according to group_assignment.

tf.compat.v1.tpu.cross_replica_sum(
    x, group_assignment=None, name=None
)

Args
x	The local tensor to the sum.
group_assignment	Optional 2d int32 lists with shape [num_groups, num_replicas_per_group]. group_assignment[i] represents the replica ids in the ith subgroup.
name	Optional op name.

Returns
A Tensor which is summed across replicas.