Programming Real-time Autofocus on a Massively Parallel Reconfigurable Architecture using Occam-pi
2011 (English)In: Proceedings of the 19th Annual IEEE International Symposium on Field-Programmable Custom Computing Machines (FCCM'2011), Los Alamitos, Calif.: IEEE Computer Society, 2011, 194-201 p.Conference paper (Refereed)
Recently we proposed occam-pi as a high-level language for programming massively parallel reconfigurable architectures. The design of occam-pi incorporates ideas from CSP and pi-calculus to facilitate expressing parallelism and reconfigurability. The feasability of this approach was illustratedby building three occam-pi implementations of DCT executing on an Ambric. However, because DCT is a simple and well studied algorithm it remained uncertain whether occam-pi would also be effective for programming novel, more complex algorithms.
In this paper, we demonstrate the applicability of occam-pi for expressing various degrees of parallelism by implementinga significantly large case-study of focus criterion calculation inan autofocus algorithm on the Ambric architecture. Autofocus is a key component of synthetic aperture radar systems. Two implementations of focus criterion calculation were developedand evaluated on the basis of performance. The comparison of the performance results with a single threaded software implementation of the same algorithm show that the throughput of the two implementations are 11x and 23x higher than the sequential implementation despite a much lower (9x) clock frequency. The two designs are, respectively, 29x and 40x moreenergy efficient.
Place, publisher, year, edition, pages
Los Alamitos, Calif.: IEEE Computer Society, 2011. 194-201 p.
Annual IEEE Symposium on Field-Programmable Custom Computing Machines
IdentifiersURN: urn:nbn:se:hh:diva-14616DOI: 10.1109/FCCM.2011.20ISI: 000298664800034ScopusID: 2-s2.0-79958730167ISBN: 978-1-61284-277-6ISBN: 978-0-7695-4301-7OAI: oai:DiVA.org:hh-14616DiVA: diva2:405548
IEEE 19th Annual International Symposium on Field-Programmable Custom Computing Machines (FCCM'2011), Campus Univ Utah, Salt Lake City, UT, MAY 01-03, 2011
FunderEU, FP7, Seventh Framework Programme, 100230
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