An Eecient End-host Protocol Processing Architecture for Real-time Audio and Video Traac
نویسنده
چکیده
Information appliances (IAs) are mass-produced, lowcost devices for specialized computation/communication tasks. Examples include webTV, smart cellular phones, and web phones. Since low cost and low power-consumption are important requirements in the design of these devices, IAs use relatively slow/cheap CPUs (usually 20{40 MHz). Real-time audio and video communication over the Internet is an integral part of many IAs which means that despite slow hardware, the communication subsystem within the OS must be able to e ciently handle heavy network trafc. This paper presents a protocol architecture which reduces I-cache miss overheads (bene ting short audio messages) and also enables use of single-copy without any hardware support or restrictions on network APIs (bene ting long video messages). We implemented UDP/IP to evaluate our architecture and measurements show that overheads for short messages are reduced about 20% while overheads for long messages
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