RT-IPC: An IPC Extension for Real-Time Mach
Takuro Kitayama and Hideyuki Tokuda
School of Computer Science, Carnegie Mellon University
Japan Advanced Institute of Science and Technology
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 Real-Time Mach (RT-Mach), we have
extended Mach IPC to be priority inversion free for real-time
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.
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