A Dual Threshold Buffer Management Scheme in Shared Memory Switch Fabric

WANG Yang;YU Shao-hua

ACTA ELECTRONICA SINICA ›› 2009, Vol. 37 ›› Issue (7) : 1400-1406.

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ACTA ELECTRONICA SINICA ›› 2009, Vol. 37 ›› Issue (7) : 1400-1406.
论文

A Dual Threshold Buffer Management Scheme in Shared Memory Switch Fabric

  • WANG Yang1, YU Shao-hua2
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Abstract

This paper concerns with the threshold control problem in a shared memory switch fabric.Traditional threshold control schemes are insensitive to the runtime traffic scenarios,and lack an efficient support for multicast forwarding.A novel scheme is presented in this paper,which aims to balance traffic pressure to the output ports and keep the system in an equilibrium state.Derived from a further exploitation of the developed effective bandwidth theory,the proposed scheme delineates an expressive formula that can calculate the shift of bandwidth burden to memory allocation.The association between bandwidth and memory utilization can be used to balance the traffic pressure by adjusting the per-queue thresholds in the shared memory.Furthermore,the presented framework can also encompass the support for multicast cells.The result of simulation shows that the scheme outperforms the traditional dynamic threshold in terms of efficiency and fairness under variant traffic modes.

Key words

switch fabric / shared memory / queue threshold / effective traffic / multicast

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WANG Yang;YU Shao-hua. A Dual Threshold Buffer Management Scheme in Shared Memory Switch Fabric[J]. Acta Electronica Sinica, 2009, 37(7): 1400-1406.
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