A soft real time scheduling server in UNIX operating system | Zendy

Hao-Hua Chu | Zendy; Klara Nahrstedt | Zendy

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A soft real time scheduling server in UNIX operating system

Author(s) -

Hao-Hua Chu,

Klara Nahrstedt

Publication year - 1997

Publication title -

lecture notes in computer science

Language(s) - English

Resource type - Book series

SCImago Journal Rank - 0.249

H-Index - 400

eISSN - 1611-3349

pISSN - 0302-9743

ISBN - 3-540-63519-X

DOI - 10.1007/bfb0000348

Subject(s) - computer science , operating system , unix , daemon , quality of service , scheduling (production processes) , computer network , embedded system , software , operations management , economics

We present a soft real-time CPU server for Continuous Media processing in the UNIX environment. The server is a daemon process from which applications can request and acquire soft real-time QoS (Quality of Service) Guarantees. Our server is an extension of the URsched scheduler. It provides (1) protection among real-time(RT) processes (2) fairness among RT and non-RT processes, (3) rate monotonic scheduling, (4) a fix to the UNIX security problem. We have implemented our protocol in the SUN Solaris 2.5 Operating System, and we have shown through experiments that our soft RT server provides predictable QoS for continuous media applications. We also discuss how we will fit the real-time server into our general Resource Broker Architecture in our future work.

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