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tf.compat.v1.tpu.cross_replica_sum

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Sum the input tensor across replicas according to group_assignment.

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.

A Tensor which is summed across replicas.