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PANACEA- A case study on the PANACEA NoC- a Nostrum Network on Chip prototype
KTH, School of Information and Communication Technology (ICT).
KTH, School of Information and Communication Technology (ICT).ORCID iD: 0000-0002-8072-1742
2006 (English)Report (Other academic)
Place, publisher, year, edition, pages
Stockholm: KTH , 2006. no 1
Series
TRITA-ICT/ECS R, ISSN 1653-7238 ; 06:01
National Category
Other Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
URN: urn:nbn:se:kth:diva-5701OAI: oai:DiVA.org:kth-5701DiVA: diva2:10150
Note
QC 20101122. Titeln ändrad från "A case study on the PANACEA NoC - a Nostrum Network on Chip prototype".Available from: 2006-05-11 Created: 2006-05-11 Last updated: 2010-11-22Bibliographically approved
In thesis
1. Exploring trade-offs between Latency and Throughput in the Nostrum Network on Chip
Open this publication in new window or tab >>Exploring trade-offs between Latency and Throughput in the Nostrum Network on Chip
2006 (English)Licentiate thesis, comprehensive summary (Other scientific)
Abstract [en]

During the past years has the Nostrum Network on Chip (NoC) been developed to become a competitive platform for network based on-chip communication. The Nostrum NoC provides a versatile communication platform to connect a large number of intellectual properties (IP) on a single chip. The communication is based on a packet switched network which aims for a small physical footprint while still providing a low communication overhead. To reduce the communication network size, a queue-less network has been the research focus. This network uses de ective hot-potato routing which is implemented to perform routing decisions in a single clock cycle.

Using a platform like this results in increased design reusability, validated signal integrity, and well developed test strategies, in contrast to a fully customised designs which can have a more optimal communication structure but has a significantly longer development cycle to verify the new design accordingly.

Several factors are considered when designing a communication platform. The goal is to create a platform which provides low communication latency, high throughput, low power consumption, small footprint, and low design, verification, and test overhead. Proximity Congestion Awareness is one technique that serves to reduce

the network load. This leads to that the latency is reduced which also increases the network throughput. Another technique is to implement low latency paths called Data Motorways achieved through a clocking method called Globally Pseudochronous Locally Synchronous clocking. Furthermore, virtual circuits can be used to provide guarantees on latency and throughput. Such guarantees are dificult in

hot-potato networks since network access has to be ensured. A technique that implements virtual circuits use looped containers that are circulating on a predefined circuit. Several overlapping virtual circuits are possible by allocating the virtual circuits in different Temporally Disjoint Networks.

This thesis summarise the impact the presented techniques and methods have on the characteristics on the Nostrum model. It is possible to reduce the network load by a factor of 20 which reduces the communication latency. This is done by distributing load information between the Switches in the network. Data Motorways

can reduce the communication latency with up to 50% in heavily loaded networks. Such latency reduction results in freed buffer space in the Switch registers which allows the traffic rate to be increased with about 30%.

Place, publisher, year, edition, pages
Kista: Mikroelektronik och informationsteknik, 2006. ix, 37 p.
Series
Trita-ICT-ECS AVH, ISSN 1653-6363 ; 06:02
Keyword
Micro electronics, Nostrum, Network on Chip, NoC, on-chip networks, micro networks, Nätverk på kisel, Nätverk på chip
National Category
Other Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
urn:nbn:se:kth:diva-3949 (URN)
Presentation
2006-05-23, Sal E, Forum, Isafjordsgatan 22, Kista, 13:00
Opponent
Supervisors
Note
QC 20101122Available from: 2006-05-11 Created: 2006-05-11 Last updated: 2010-11-22Bibliographically approved

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Öberg, Johnny

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