Differentiated Services with Statistical Real-Time Guarantees in Static-Priority Scheduling Networks

Authors:
Shengquan Wang;Dong Xuan;Riccardo Bettati;Wei Zhao
Affiliations:
-;-;-;-
Venue:
RTSS '01 Proceedings of the 22nd IEEE Real-Time Systems Symposium
Year:
2001

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Abstract

We propose and analyze a methodology for providingabsolute differentiated services with statistical performanceguarantees for real-time applications in networksthat use class-based (as opposed to flow-aware) static-priorityschedulers.We develop a method that can be usedto derive statistical delay guarantees in a flow-unawarefashion.Traditionally, both deterministic and statistical de-layanalysis methods either depend on schedulers that keepper-flow state information, or require detailed informationabout flow population at delay analysis time.The fact thatno such information is needed for delay analysis allows usto perform deadline tests during system (re-)configurationtime.We are so able to reduce the runtime admission controlto a simple utilization test.No explicit delay computationis necessary at admission time, making this approachscalable to large systems.