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Cache directory look-up re-use as conflict check mechanism for speculative memory requests

United States Patent

September 10, 2013
View the Complete Patent at the US Patent & Trademark Office
In a cache memory, energy and other efficiencies can be realized by saving a result of a cache directory lookup for sequential accesses to a same memory address. Where the cache is a point of coherence for speculative execution in a multiprocessor system, with directory lookups serving as the point of conflict detection, such saving becomes particularly advantageous.
Ohmacht; Martin (Yorktown Heights, NY)
International Business Machines Corporation (Armonk, NY)
12/ 984,252
January 4, 2011
GOVERNMENT CONTRACT This invention was made with Government support under Contract No.: B554331 awarded by Department of Energy. The Government has certain rights in this invention 21--Speculation and transaction in a system