NDLI: A case for heterogeneous on-chip interconnects for CMPs

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A case for heterogeneous on-chip interconnects for CMPs

Content Provider	ACM Digital Library
Author	Mishra, Asit K. Das, Chita R. Vijaykrishnan, N.
Abstract	Network-on-chip (NoC) has become a critical shared resource in the emerging Chip Multiprocessor (CMP) era. Most prior NoC designs have used the same type of router across the entire network. While this homogeneous network design eases the burden on a network designer, partitioning the resources equally among all routers across the network does not lead to optimal resource usage, and hence, affects the performance-power envelope. In this work, we propose to apportion the resources in an NoC to leverage the non-uniformity in network resource demand. Our proposal includes partitioning the network resources, specifically buffers and links, in an optimal manner. This approach results in redistributing resources such that routers that require more resources are allocated more buffers and wider links compared to routers demanding fewer resources. This results in a novel heterogeneous network, called HeteroNoC, which is composed of two types of routers -- small power efficient routers, and big high performance routers. We evaluate a number of heterogeneous network configurations, composed of big and small routers, and show that giving more resources to routers along the diagonals in a mesh network provides maximum benefits in terms of performance and power. We also show the potential benefits of the HeteroNoC design by co-evaluating it with memory-controllers and configuring it with an asymmetric CMP consisting of heterogeneous cores.
Starting Page	389
Ending Page	400
Page Count	12
File Format	PDF MP4
ISBN	9781450304726
DOI	10.1145/2000064.2000111
Language	English
Publisher	Association for Computing Machinery (ACM)
Publisher Date	2011-06-04
Publisher Place	New York
Access Restriction	Subscribed
Subject Keyword	Heterogeneous networks Network on chip
Content Type	Audio Text
Resource Type	Article

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