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https://doi.org/10.1109/infcom...
Article . 2009 . Peer-reviewed
License: STM Policy #29
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The Crosspoint-Queued Switch

Authors: Josef Kanizo; David Hay; Isaac Keslassy;

The Crosspoint-Queued Switch

Abstract

This paper calls for rethinking packet-switch architectures by cutting all dependencies between the switch fabric and the linecards. Most single-stage packet-switch architectures rely on an instantaneous communication between the switch fabric and the linecards. Today, however, this assumption is breaking down, because effective propagation times are too high and keep increasing with the line rates. In this paper, we argue for a self-sufficient switch fabric by moving all the buffering from the linecards to the switch fabric. We introduce the crosspoint-queued (CQ) switch, a new buffered-crossbar switch architecture with large crosspoint buffers and no input queues, and show how it can be readily implemented in a single SRAM-based chip using current technology. For a crosspoint buffer size of one, we provide a closed-form throughput formula for all work-conserving schedules under uniform Bernoulli i.i.d. arrivals. Furthermore, we study the performance of the switch for larger buffer sizes and show that it nearly behaves as an ideal output-queued switch. Finally, we confirm our results using synthetic as well as trace-based simulations.

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Italy
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    This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
    31
    popularity
    This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
    Average
    influence
    This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
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    impulse
    This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
31
Average
Top 10%
Top 10%