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Multi-cluster processor operating only select number of clusters during each phase based on program statistic monitored at predetermined intervals

United States Patent

February 10, 2009
View the Complete Patent at the US Patent & Trademark Office
In a processor having multiple clusters which operate in parallel, the number of clusters in use can be varied dynamically. At the start of each program phase, the configuration option for an interval is run to determine the optimal configuration, which is used until the next phase change is detected. The optimum instruction interval is determined by starting with a minimum interval and doubling it until a low stability factor is reached.
Balasubramonian; Rajeev (Sandy, UT), Dwarkadas; Sandhya (Rochester, NY), Albonesi; David (Ithaca, NY)
11/ 147,392
June 8, 2005
STATEMENT OF GOVERNMENT INTEREST The work leading to the present invention was supported in part by NSF grants EIA-0080124, CCR-9811929, CCR-9988361, CCR-0219848, and ECS-0225413; by DARPA/ITO under AFRL contract F29601-00-K-0182; and by the U.S. Department of Energy Office of Inertial Confinement Fusion under Cooperative Agreement No. DE-FC03-92SF19460. The government has certain rights in the invention.