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The effect of buffering strategies on protocol execution performance

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2 Author(s)
Woodside, C.M. ; Dept. of Syst. & Comput. Eng., Carleton Univ., Ottawa, Ont., Canada ; Montealegre, J.R.

The execution workload of a protocol often limits the data communications throughput in local area and wide area networks. The handling of buffers is one of the implementation factors that affects the execution workload of a protocol implementation: if possible, copying of user data should be avoided. Two buffer cut-through strategies for avoiding copying higher-level data are described, with some of the mechanisms necessary to implement them. The resulting execution workload in a transport protocol (similar to the ISO class 4 protocol) is studied in detail. Individual protocol actions are modeled for a wide range of data-stream parameters. The improvement when copying is avoided is shown to be relatively insensitive to the parameter values and to be as high as 80% when the checksum is not computed at the transport level

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Communications, IEEE Transactions on  (Volume:37 ,  Issue: 6 )