step_stats {
  dev_stats {
    device: "/job:localhost/replica:0/task:0/cpu:0"
    node_stats {
      node_name: "_SOURCE"
      all_start_micros: 1459365298611334
      op_start_rel_micros: 29
      op_end_rel_micros: 30
      all_end_rel_micros: 52
      memory {
        allocator_name: "cpu"
      }
      timeline_label: "_SOURCE = NoOp()"
      scheduled_micros: 1459365298611291
    }
  }
}
