Method and apparatus for prefetching information and storing...

Details Method and apparatus for prefetching information and storing... Method and apparatus for prefetching information and storing...

2005-05-31

2005-05-31

Peikari, B. James (Department: 2186)

Electrical computers and digital processing systems: memory

Address formation

Generating prefetch, look-ahead, jump, or predictive address

C711S122000, C710S053000, C710S052000, C712S237000

Reexamination Certificate

active

06901500

ABSTRACT:
A system for prefetching information from a computer storage includes a central processing unit operable to transmit to a transfer bus a memory transfer request containing a desired memory address. The system also includes a system controller operable to receive the memory transfer request from the transfer bus and to retrieve a prefetch block of data from the computer storage in response to determining that a stream buffer local to the system controller does not contain a copy of data stored at the desired memory address. The system controller is further operable to retrieve the data from the stream buffer and communicate the data to the central processing unit in response to determining that the stream buffer contains a copy of the data stored at the desired memory address.

REFERENCES:
patent: 5261066 (1993-11-01), Jouppi et al.
patent: 5664147 (1997-09-01), Mayfield
patent: 5761706 (1998-06-01), Kessler et al.
patent: 6085291 (2000-07-01), Hicks et al.
patent: 449540 (1991-10-01), None
patent: 09265432 (1997-10-01), None
patent: 09319657 (1997-12-01), None

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