Memory prefetch method and system

Details Memory prefetch method and system Memory prefetch method and system

2007-07-03

2007-07-03

Elmore, Reba I. (Department: 2189)

Chemistry: fertilizers

Processes and products

Forms or conditioning

C711S146000, C711S204000, C711S213000

Reexamination Certificate

active

10818601

ABSTRACT:
Prefetching data and instructions from a hierarchical memory based upon trajectories and patterns of prior memory fetches. Portions of the data are stored in a slower main memory and are transferred to faster intermediate memory between a requester and the slower main memory. The selected data items are retrieved from the slower main memory into a prefetch read buffer as an intermediate memory prior to any request from the requester for the particular selected and prefetched data. The address and size of the prefetched data is derived from the history, pattern, or trajectory of prior memory reads.

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P.G. Emma, J.W. Knight, J.H. Pomerene, R.N. Rechtschaffen, and F.J. Sparacio, “Confirmed Prefetching With Confirmation On Exit”, IBM Technical Disclosure Bulletin, vol. 29 (2), p. 911, (1986).

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