Anticipating cache memory loader and method

Details Anticipating cache memory loader and method Anticipating cache memory loader and method

1996-11-19

2000-02-15

Cabeca, John W.

Electrical computers and digital processing systems: memory

Storage accessing and control

Hierarchical memories

711 6, 711118, 711137, 711160, G06F 1210, G06F 1712

Patent

active

060264713

ABSTRACT:
According to the present invention, an anticipating cache memory loader is provided to "pre-load" the cache with the data and instructions most likely to be needed by the CPU once the currently executing task is completed or interrupted. The data and instructions most likely to be needed after the currently executing task is completed or executed is the same data and instructions that were loaded into the cache at the time the next scheduled task was last preempted or interrupted. By creating and storing an index to the contents of the cache for various tasks at the point in time the tasks are interrupted, the data and instructions previously swapped out of the cache can be retrieved from main memory and restored to the cache when needed. By using available bandwidth to pre-load the cache for the next scheduled task, the CPU can begin processing the next scheduled task more quickly and efficiently than if the present invention were not utilized. Using the present invention, CPU stalls will be reduced because the CPU will operate more efficiently without waiting for excessive periods of time for the cache to be loaded with relevant data and instructions.

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