RT-IPC: An IPC Extension for Real-Time Mach
Takuro Kitayama, Tatsuo Nakajima, Hideyuki Tokuda · 1993
Interprocess communication (IPC) provides the fundamental mechanism for the Mach microkernel to be extensible and flexible. Mach IPC provides efficient communication mechanisms for many applications. However, it does not provide sufficient functionality for real-time applications which have rigid timing constraints among threads. In RealTime Mach (RT-Mach), we have extended Mach IPC to be priority inversion free for real-time applications. This paper describes the Real-Time IPC (RT-IPC) facilities, its implementation, and the evaluation results. We used the Distributed Hartstone (DHS) real-time benchmark for the evaluation and the results show that RT-IPC can reduce priority inversion and improve CPU utilization for real-time applications. 1. Introduction In traditional operating systems, it is difficult to support real-time applications such as continuous media applications and mobile computing, due to the lack of facilities which can manage time constrained resources, such as proce...