QNoC: QoS architecture and design process for network on chip

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QNoC: QoS architecture and design process for network on chip (2004)

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by Evgeny Bolotin , Israel Cidon , Ran Ginosar , Avinoam Kolodny

Venue:	JOURNAL OF SYSTEMS ARCHITECTURE
Citations:	117 - 14 self

BibTeX

@ARTICLE{Bolotin04qnoc:qos,
    author = {Evgeny Bolotin and Israel Cidon and Ran Ginosar and Avinoam Kolodny},
    title = {QNoC: QoS architecture and design process for network on chip},
    journal = {JOURNAL OF SYSTEMS ARCHITECTURE},
    year = {2004},
    volume = {50},
    pages = {105--128}
}

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Abstract

We define Quality of Service (QoS) and cost model for communications in Systems on Chip (SoCs), and derive related Network on Chip (NoC) architecture and design process. SoC inter-module communication traffic is classified into four classes of service: Signaling (for inter-module control signals); Real-Time (representing delay-constrained bit streams); RD/WR (modeling short data access) and Block-Transfer (handling large data bursts). Communication traffic of the target SoC is analyzed (by means of analytic calculations and simulations), and QoS requirements (delay and throughput) for each service class are derived. A customized Quality-of-Service NoC (QNoC) architecture is derived by modifying a generic network architecture. The customization process minimizes the network cost (in area and power) while maintaining the required QoS. The generic network is based on a two-dimensional planar mesh and fixed shortest path (X-Y based) multi-class wormhole routing. Once communication requirements of the target SoC are identified, the network is customized as follows: The SoC modules are placed so as to minimize spatial traffic density, unnecessary mesh links and switching nodes are removed, and bandwidth is allocated to the remaining links and switches according to their relative load so that link utilization is balanced. The result is a low cost customized QNoC for the target SoC which guarantees that QoS requirements are met.

Keyphrases

design process target soc qos architecture qos requirement generic network architecture customized quality-of-service noc generic network link utilization unnecessary mesh link multi-class wormhole routing large data burst relative load communication requirement delay-constrained bit stream two-dimensional planar mesh inter-module control signal rd wr communication traffic required qos short data access cost model customization process service class soc module low cost analytic calculation network cost spatial traffic density soc inter-module communication traffic

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