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Method and apparatus of prefetching streams of varying prefetch depth

United States Patent

8,103,832
January 24, 2012
View the Complete Patent at the US Patent & Trademark Office
Method and apparatus of prefetching streams of varying prefetch depth dynamically changes the depth of prefetching so that the number of multiple streams as well as the hit rate of a single stream are optimized. The method and apparatus in one aspect monitor a plurality of load requests from a processing unit for data in a prefetch buffer, determine an access pattern associated with the plurality of load requests and adjust a prefetch depth according to the access pattern.
Gara; Alan (Mount Kisco, NY), Ohmacht; Martin (Yorktown Heights, NY), Salapura; Valentina (Chappaqua, NY), Sugavanam; Krishnan (Mahopac, NY), Hoenicke; Dirk (Seebruck-Seeon, DE)
International Business Machines Corporation (Armonk, NY)
11/ 768,697
June 26, 2007
STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT This invention was made with Government support under Contract. No. B554331 awarded by Department of Energy. The Government has certain rights in this invention.