def METHOD_NAME(vm):
    """
    run iozone in guest
    :param vm: vm object
    """
    test.log.debug("Start iozone in background.")
    iozone = generate_instance(params, vm, 'iozone')
    args = (params['iozone_cmd_opitons'], int(params['iozone_timeout']))
    iozone_thread = utils_misc.InterruptedThread(iozone.run, args)
    iozone_thread.start()
    if not utils_misc.wait_for(lambda: iozone_thread.is_alive, 60):
        test.error("Failed to start iozone thread.")
    return iozone_thread