Efficient multiple-table reference prediction mechanism

Details Efficient multiple-table reference prediction mechanism Efficient multiple-table reference prediction mechanism

2006-07-13

2010-02-02

Chan, Eddie P (Department: 2183)

Electrical computers and digital processing systems: processing

Processing control

Branching

Reexamination Certificate

active

07657729

ABSTRACT:
A method and an apparatus for enabling a prefetch engine to detect and support hardware prefetching with different streams in received accesses. Multiple (simple) history tables are provided within (or associated with) the prefetch engine. Each of the multiple tables is utilized to detect different access patterns. The tables are indexed by different parts of the address and are accessed in a preset order to reduce the interference between different patterns. When an address does not fit the patterns of a first table, the address is passed to the next table to be checked for a match of different patterns. In this manner, different patterns may be detected at different tables within a single prefetch engine.

REFERENCES:
patent: 5941981 (1999-08-01), Tran
patent: 6986027 (2006-01-01), Barowski et al.

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