Lightweight kernel/user communication for real-time and multimedia applications
NOSSDAV '01 Proceedings of the 11th international workshop on Network and operating systems support for digital audio and video
Coordinated CPU and event scheduling for distributed multimedia applications
MULTIMEDIA '01 Proceedings of the ninth ACM international conference on Multimedia
Adaptive QoS Management for Collaboration in Heterogeneous Environments
IPDPS '02 Proceedings of the 16th International Parallel and Distributed Processing Symposium
IQ-RUDP: Coordinating Application Adaptation with Network Transport
HPDC '02 Proceedings of the 11th IEEE International Symposium on High Performance Distributed Computing
KStreams: kernel support for efficient data streaming in proxy servers
NOSSDAV '05 Proceedings of the international workshop on Network and operating systems support for digital audio and video
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Abstract: This paper describes a software mechanism, called quality events, that utilizes application- and/or system-level service extensions to provide quality of service (QoS) guarantees to end users. Such extensions offer flexibility in: (1) how application- and/or system-level services are dynamically managed to maintain required quality, (2) when such management occurs, and (3) where this service management is performed. Several adaptive QoS management strategies are implemented with quality events and compared with respect to their ability to meet application-specific QoS requirements. These management strategies have different service adaptation latencies, and different degrees of coordination between services. Significant performance variations observed for these alternative strategies demonstrate the importance of a flexible QoS management mechanism like quality events. Finally, we show that adaptive QoS and, hence, resource management strategies can lead to more efficient use of resources, and better qualities of service for certain applications than non-adaptive resource management methods.