Novel Cross-Transition Elimination Technique Improving Delay and Power Consumption for On-Chip Buses

Antoine Courtay 1, 2 Johann Laurent 3 Olivier Sentieys 1 Nathalie Julien 3
1 CAIRN - Energy Efficient Computing ArchItectures with Embedded Reconfigurable Resources
Inria Rennes – Bretagne Atlantique , IRISA-D3 - ARCHITECTURE
3 Lab-STICC_UBS_CACS_MOCS
Lab-STICC - Laboratoire des sciences et techniques de l'information, de la communication et de la connaissance
Abstract : Interconnects are now considered as the bottleneck in the design of system-on-chip (SoC) since they introduce delay and power consumption. To deal with this issue, data coding for interconnect power and timing optimization has been introduced. In today's SoCs these techniques are not efficient anymore due to their codec complexity or to their unrealistic experimentations. Based on some realistic observations on interconnect delay and power estimation, the spatial switching technique is proposed. It allows the reduction of delay and power consumption (including extra power consumption due to codecs) for on-chip buses. The concept of the technique is to detect all cross-transitions on adjacent wires and to decide if the adjacent wires are exchanged or not. Results show the spatial switching efficiency for different technologies and bus lengths. The power consumption reduction can reach up to 12% for a 5-mm bus and more if buses are longer.
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https://hal.archives-ouvertes.fr/hal-00345737
Contributor : Antoine Courtay <>
Submitted on : Tuesday, December 9, 2008 - 5:30:24 PM
Last modification on : Wednesday, December 18, 2019 - 5:05:03 PM

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  • HAL Id : hal-00345737, version 1

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Antoine Courtay, Johann Laurent, Olivier Sentieys, Nathalie Julien. Novel Cross-Transition Elimination Technique Improving Delay and Power Consumption for On-Chip Buses. International Workshop on Power and Timing Modeling, Optimization and Simulation. PATMOS 2008, Sep 2008, Lisbonne, Portugal. pp.359-368. ⟨hal-00345737⟩

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