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The design and performance of a real-time I/O subsystem

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3 Author(s)
Kuhns, F. ; Dept. of Comput. Sci., Washington Univ., St. Louis, MO, USA ; Schmidt, D.C. ; Levine, D.L.

The paper describes the design and performance of a real time I/O (RIO) subsystem that supports real time applications running on off-the-shelf hardware and software. The paper provides two contributions to the study of real time I/O subsystems. First it describes how RIO supports end-to-end, prioritized traffic to bound the I/O utilization of each priority class and eliminates the key sources of priority inversion in I/O subsystems. Second, it illustrates how a real time I/O subsystem can reduce latency bounds on end-to-end communication between high-priority clients without unduly penalizing low priority and best-effort clients

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Real-Time Technology and Applications Symposium, 1999. Proceedings of the Fifth IEEE

Date of Conference: