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Distributed multimedia applications, such as video-on-demand
(VOD) and video-conferencing, demand high data bandwidth for
transferring continuous video datathrough networks. Currently,
the bandwidth of modern network hardware is largeenough to
support these applications to send video stream in real-time.
However, the performance of network software does not increase
as fast as that of network hardware. In other word, the network
bandwidth is limited by network software. In order to improve
the capability of a video server, some changes andmodifications
of network software must be made. In this thesis, we focus on
the improvement of the UDP protocol. The modifications include
checksum elimination,user-to-kernel data copy elimination, and
memory allocation and deallocationreduction. As a result, the
obtained total bandwidth of UDP/IP can be up to8.33%.
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