Toward Adaptive Control of QoS-Importance Decoupled Real-Time Systems
2007 (English)In: IEEE International Workshop on Feedback Control Implementation and Design in Computing Systems and Networks,2007, 2007Conference paper (Refereed)
This paper deals with differentiated services in real-time systems. Tasks submitted to a real-time system are differentiated with respect to importance and QoS requirements. We use feedback control to enforce the requirements in QoS and ensure a hierarchical admission policy based on the importance of the tasks. The results show that the requirements are met during steady state when the workload is constant. The feedback control approach does not satisfactorily manage QoS when there is a sudden and significant workload change (transient state) due to the time-variant nature of the system. To address this, we present preliminary and promising results using adaptive control, and report on some challenges we are facing when applying the theory.
Place, publisher, year, edition, pages
real-time system, quality of service, QoS, control theory, system identification, differentiated services
IdentifiersURN: urn:nbn:se:liu:diva-38143Local ID: 41926OAI: oai:DiVA.org:liu-38143DiVA: diva2:258992