def test_after(self, vm: Qemu, title, x):
        vm.change_qemu_parameters({"count_packets_from_guest_on": 0})
        sleep(0.5)
        with open("/tmp/qemu_packets_count", "rb") as f:
            packet_count = int.from_bytes(f.read(8),
                                          byteorder='little',
                                          signed=False)
            total_size = int.from_bytes(f.read(8),
                                        byteorder='little',
                                        signed=False)

        self.packet_count_graph.add_data(title, x, packet_count)
        self.packet_size_graph.add_data(
            title, x,
            float(total_size) / (float(packet_count) + 0.01))
 def test_before(self, vm: Qemu):
     vm.change_qemu_parameters({"count_packets_from_guest_on": 1})