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Costs and benefits of flexibility in spatial division Circuit Switched Networks-on-Chip
KTH, School of Information and Communication Technology (ICT), Electronic Systems.
KTH, School of Information and Communication Technology (ICT), Electronic Systems.
2013 (English)In: NoCArc '13 Proceedings of the Sixth International Workshop on Network on Chip Architectures, Association for Computing Machinery (ACM), 2013, 41-46 p.Conference paper (Refereed)
Abstract [en]

Although most Network-on-Chip (NoC) designs are based on Packet Switching (PS), the importance of Circuit Switching (CS) should not be underestimated. Many MPSoC executing real-time applications require an underlying communication backbone that can relay messages from one node to another with guaranteed throughput. Compared to PS, CS can provide guaranteed throughput with lower area and power overheads. It is also highly suited for applications where nodes transfer long messages. Spatial Division Multiplexing (SDM) can allow more efficient use of available network resources by dividing them among multiple simultaneous transactions. The network developed by Vali [1] has three design variations based on the number of sub-channels, has a predictable connection setup time, and uses CS to provide guaranteed throughput once a connection is established. In this paper we use this network as a basis to study the effect of flexibility based on SDM, on the performance of a CS networks. A network evaluation platform has been developed to configure and evaluate networks with a maximum of 8 sub-networks, with each sub-network comprising of 1, 2 or 4 sub-channels. We show that under uniform traffic pattern with requests of uniform random bandwidth (BW) requirement, a less flexible network outperforms a network with higher flexibility due to a phenomenon we call 'stray requests'. We conclude this paper by showing that under high network traffic, performance of our flexible networks can be as much as 113% better than HAGAR [2] and Liu's [3] network. Co

Place, publisher, year, edition, pages
Association for Computing Machinery (ACM), 2013. 41-46 p.
, ACM International Conference Proceeding Series
Keyword [en]
Costs and benefits, Flexible networks, Guaranteed throughputs, Network evaluation, Network-on-chip design, Networks on chips, Real-time application, Spatial Division Multiplexing
National Category
Engineering and Technology
URN: urn:nbn:se:kth:diva-143834DOI: 10.1145/2536522.2536526ScopusID: 2-s2.0-84892934473ISBN: 978-145032370-3OAI: diva2:712506
6th International Workshop on Network on Chip Architectures, NoCArc 2013 - In Conjunction with the 46th Annual IEEE/ACM International Symposium on Microarchitecture, MICRO 2013; Davis, CA; United States; 8 December 2013 through 8 December 2013

QC 20140415n

Available from: 2014-04-15 Created: 2014-03-31 Last updated: 2014-04-15Bibliographically approved

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