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Evolution in architectures and programming methodologies of coarse-grained reconfigurable computing
Örebro University, School of Science and Technology. (CC-lab)
Halmstad University, School of Information Science, Computer and Electrical Engineering (IDE), Halmstad Embedded and Intelligent Systems Research (EIS), Embedded Systems (CERES). (CC-lab)
2009 (English)In: Microprocessors and microsystems, ISSN 0141-9331, E-ISSN 1872-9436, Vol. 33, no 3, 161-178 p.Article in journal (Refereed) Published
Abstract [en]

In order to meet the increased computational demands of, e.g., multimedia applications, such as video processing in HDTV, and communication applications, such as baseband processing in telecommunication systems, the architectures of reconfigurable devices have evolved to coarse-grained compositions of functional units or program controlled processors, which are operated in a coordinated manner to improve performance and energy efficiency.

In this survey we explore the field of coarse-grained reconfigurable computing on the basis of the hardware aspects of granularity, reconfigurability, and interconnection networks, and discuss the effects of these on energy related properties and scalability. We also consider the computation models that are being adopted for programming of such machines, models that expose the parallelism inherent in the application in order to achieve better performance. We classify the coarse-grained reconfigurable architectures into four categories and present some of the existing examples of these categories. Finally, we identify the emerging trends of introduction of asynchronous techniques at the architectural level and the use of nano-electronics from technological perspective in the reconfigurable computing discipline.

Place, publisher, year, edition, pages
Amsterdam: Elsvier , 2009. Vol. 33, no 3, 161-178 p.
Keyword [en]
Reconfigurable architectures, Coarse-grained arrays, Computation models, Globally-asynchronous locally-synchronous
National Category
Engineering and Technology Computer Science
Research subject
Computer and Systems Science
Identifiers
URN: urn:nbn:se:oru:diva-15260DOI: 10.1016/j.micpro.2008.10.003OAI: oai:DiVA.org:oru-15260DiVA: diva2:410632
Projects
Embedded Parallel Computing
Available from: 2009-09-18 Created: 2011-04-14 Last updated: 2011-06-20Bibliographically approved
In thesis
1. Programming of coarse-grained reconfigurable architectures
Open this publication in new window or tab >>Programming of coarse-grained reconfigurable architectures
2011 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

Coarse-grained reconfigurable architectures, which offer massive parallelism coupled with the capability of undergoing run-time reconfiguration, are gaining attention in order to meet not only the increased computational demands of high-performance embedded systems, but also to fulfill the need of adaptability to functional requirements of the application. This thesis focuses on the programming aspects of such coarse-grained reconfigurable computing devices, including the relevant computation models that are capable of exposing different kinds of parallelism inherent in the application and the ability of these models to capture the adaptability requirements of the application. The thesis suggests the occam-pi language for programming of a broad class of coarse-grained reconfigurable architectures as an intermediate language; we call it intermediate, since we believe that the applicationprogramming is best done in a high-level domain-specific language. The salient properties of the occam-pi language are explicit concurrency with built-in mechanisms for interprocessorcommunication, provision for expressing dynamic parallelism, support for the expression of dynamic reconfigurations, and placement attributes. To evaluate the programming approach, a compiler framework was extended to support the language extensions in the occam-pi language, and backends were developed to target two different coarse-grained reconfigurable architectures. XPP and Ambric. The results on XPP reveal that the occam-pi based implementations produce comparable throughput to those of NML programs, while programming at a much higher level of abstraction than that of NML. Similarly the two occam-pi implementations of autofocus criterion calculation targeted to the Ambric platform outperform the CPU implementation by factors of 11-23. Thus, the results of the implemented case-studies suggest that the occam-pi language based approach simplifies the development of applications employing run-time reconfigurable devices without compromising the performance benefits.

Place, publisher, year, edition, pages
Örebro: Örebro universitet, 2011. 47 p.
Series
Örebro Studies in Technology, ISSN 1650-8580 ; 48
National Category
Engineering and Technology Computer Science
Research subject
Computer and Systems Science
Identifiers
urn:nbn:se:oru:diva-15246 (URN)978-91-7668-786-4 (ISBN)
Public defence
2011-05-26, Wigforssalen, Högskolan i Halmstad, Halmstad, 10:15 (English)
Opponent
Supervisors
Available from: 2011-04-12 Created: 2011-04-12 Last updated: 2011-06-20Bibliographically approved

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