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Impact of CPU Reservation on End-to-End Performance of Transport Protocols

Summary: Impact of CPU Reservation on End-to-End Performance of
Transport Protocols
Paper number: 286 (Number of pages: 18)
Current communication systems usually provide either best-e ort resource allocation or network
bandwidth reservation support for end-system transport tasks. We present an analysis of the impact of
CPU reservation on transport tasks transmitting multimedia tra∆c and its integration with the network
bandwidth reservation concept. The transport protocols considered are TCP and UDP, supporting ows
over RSVP-capable networks. The integration comes together in a QoS-aware communication broker
architecture which considers both CPU and network bandwidth reservation for transport protocols.
Our results show that reservation of the CPU for transport tasks at the end systems needs to be an
integral part of the end-to-end resource management framework in order to provide end-to-end QoS
guarantees. Experiments on a prototype system with CPU reservation for the transport task show
substantial improvement in the performance and Quality of Service (QoS) of multimedia tra∆c relative to
their performance in the absence of CPU reservation. In the absence of CPU reservation, transport tasks
indicate potential degradation in performance and QoS, even in the presence of end-to-end bandwidth
1 Introduction
The current Internet architecture provides point-to-point best e ort service which is inadequate for dis-
tributed multimedia applications like video-on-demand and video conferencing since these applications are


Source: Adve, Sarita - Department of Computer Science, University of Illinois at Urbana-Champaign


Collections: Computer Technologies and Information Sciences