Prefetch unit

Details Prefetch unit Prefetch unit

2006-06-15

2009-02-17

Nguyen, Than (Department: 2187)

Electrical computers and digital processing systems: memory

Storage accessing and control

Hierarchical memories

C711S204000

Reexamination Certificate

active

07493451

ABSTRACT:
In one embodiment, a processor comprises a prefetch unit coupled to a data cache. The prefetch unit is configured to concurrently maintain a plurality of separate, active prefetch streams. Each prefetch stream is either software initiated via execution by the processor of a dedicated prefetch instruction or hardware initiated via detection of a data cache miss by one or more load/store memory operations. The prefetch unit is further configured to generate prefetch requests responsive to the plurality of prefetch streams to prefetch data in to the data cache.

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IBM, “PowerPC Virtual Environment Architecture,” Book II, Version 2.01, Dec. 2003, 7 pages.

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