Structuring Communication Software for Quality-of-Service Guarantees
IEEE Transactions on Software Engineering
Efficient user-space protocol implementations with QoS guarantees using real-time upcalls
IEEE/ACM Transactions on Networking (TON)
Resource containers: a new facility for resource management in server systems
OSDI '99 Proceedings of the third symposium on Operating systems design and implementation
Migrating sockets—end system support for networking with quality of service guarantees
IEEE/ACM Transactions on Networking (TON)
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
BT Technology Journal
IPDPS '01 Proceedings of the 15th International Parallel & Distributed Processing Symposium
Real-Time Systems
Flexible cross-domain event delivery for quality-managed multimedia applications
ACM Transactions on Multimedia Computing, Communications, and Applications (TOMCCAP)
Integrated CPU and network-I/O QoS management in an endsystem
Computer Communications
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Scheduling of many different kinds of activities takes place in distributed real-time and multimedia systems. It includes scheduling of computations, window services, file system management, I/O services and communication protocol processing. In this paper, we investigate the problem of scheduling communication protocol processing in real-time systems. Communication protocol processing takes a relatively substantial amount of time and if not structured correctly, unpredictable priority inversion and undesirable timing behavior can result to applications communicating with other processors but are otherwise scheduled correctly. We describe the protocol processing architecture in the RT-Mach operating system, which allows the timing of protocol processing to be under strict application control An added benefit is also obtained in the form of higher performance. This scheduling architecture is consistent with the other RT-Mach scheduling mechanisms including fixed priority scheduling and processor reservation. The benefits of this protocol architecture are demonstrated both under synthetic workloads and in a realistic distributed videoconferencing system we have implemented in RT-Mach. End-to-end delays for both audio and video are as predicted even with other threads competing for the CPU and the network.' critical