Debattista, Kurt, Dubla, Piotr, Santos, Luis Paulo and Chalmers, Alan (2011) Wait-free shared-memory irradiance caching. IEEE Computer Graphics and Applications, Vol.31 (No.5). pp. 66-78. doi:10.1109/MCG.2010.80 ISSN 0272-1716.

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Abstract

Parallelizing rendering algorithms to exploit multiprocessor and multicore machines isn't straightforward. Certain methods require frequent synchronization among threads to obtain benefits similar to the sequential algorithm. One such algorithm is the irradiance cache (IC), an acceleration data structure that caches indirect diffuse irradiance values. In multicore systems, the threads must share the IC to achieve high efficiency. A proposed wait-free mechanism for accessing the shared IC doesn't use the common blocking or busy-waiting methods, thus avoiding most serialization and reducing contention. A comparison with two classic approaches-a lock-based mechanism and a local-write technique-on two systems with up to 24 cores shows that the wait-free approach significantly reduces synchronization overhead, thus improving performance. The Web extra PDF augments the article. The Web extra video is an animation that demonstrates the wait-free IC system running at close to interactive rates on an 8-core machine.

Item Type:	Journal Article
Subjects:	Q Science > QA Mathematics > QA76 Electronic computers. Computer science. Computer software T Technology > TK Electrical engineering. Electronics Nuclear engineering
Divisions:	Faculty of Science, Engineering and Medicine > Engineering > WMG (Formerly the Warwick Manufacturing Group)
Library of Congress Subject Headings (LCSH):	Rendering (Computer graphics), Parallel processing (Electronic computers), Cache memory
Journal or Publication Title:	IEEE Computer Graphics and Applications
Publisher:	Institute of Electrical and Electronics Engineers
ISSN:	0272-1716
Official Date:	September 2011
Dates:	Date Event September 2011 Published
Volume:	Vol.31
Number:	No.5
Number of Pages:	13
Page Range:	pp. 66-78
DOI:	10.1109/MCG.2010.80
Status:	Peer Reviewed
Publication Status:	Published
Access rights to Published version:	Restricted or Subscription Access
Date of first compliant deposit:	18 December 2015
Date of first compliant Open Access:	18 December 2015
Funder:	Fundação para a Ciência e a Tecnologia (FCT), Engineering and Physical Sciences Research Council (EPSRC)
Grant number:	PT-DC/EIA/65965/2006 (FCT), EP/D069874/2 (EPSRC)

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