Design and Implementation of a Run-Time TMO Monitor on LTMOS

A real-time system should provide services on time for users. For this, it is needed to have a monitoring function. But monitoring itself causes some problems to influence real-time services. To solve these problem, we present the architecture for a run-time TMO monitor using DS(Data Store) and an implementation of a run-time TMO monitor which checks timing behavior of TMO(Time-triggered Message-triggered Object) programs running on LTMOS(Linux TMO system). The architecture for a run-time TMO monitor using DS(Data Store). DS gives some benefit as follows. First, DS separates a run-time TMO monitor from TMO programs providing real-time services. An independent monitor can minimize the influence to real-time TMO programs. Second, DS allows for any other applications not supporting TMO to access TMO method’s information. We present Data Store structure and DS API in LTMOS to support this new architecture and develop a run-time TMO monitor and a TMO program based on this architecture. The architecture presented in this paper can be used in all the areas which need real-time monitoring.