def METHOD_NAME(self, perf_config):
    super().METHOD_NAME(perf_config)
    flow_measurements = get_flow_measurements_from_config(perf_config)
    flow = flow_measurements[0].flows[0]
    tweak_config = perf_config.perf_test_tweak_config
    if flow.type == "udp_stream":
        tweak_config["udp_fragmentation"] = {}
        for host in self.matched:
            self._config_ip_fragmentation(tweak_config, host, flow)