Runtime selective control of hardware prefetch mechanism

Details Runtime selective control of hardware prefetch mechanism Runtime selective control of hardware prefetch mechanism

2008-01-08

2008-01-08

Kim, Matthew (Department: 2186)

Electrical computers and digital processing systems: memory

Storage accessing and control

Hierarchical memories

C711S169000, C712S207000

Reexamination Certificate

active

10850426

ABSTRACT:
A control mechanism that allows individual applications to turn hardware prefetch on or off is provided. By preliminary trial run one can determine precisely whether an application will benefit or suffer from hardware prefetch. The selective control of prefetching by individual applications is made possible by associating a status bit with individual processes in the machine status word of each processor. Using this prefetch bit, a process turns prefetching on or off to its own advantage in the processor core immediately after a context switch.

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