Single cycle context switching by swapping a primary latch...

Details Single cycle context switching by swapping a primary latch... Single cycle context switching by swapping a primary latch...

2008-03-11

2008-03-11

Meonske, Tonia L. (Department: 2181)

Electrical computers and digital processing systems: processing

Processing control

Context preserving (e.g., context swapping, checkpointing,...

C712S225000, C712S229000, C718S108000

Reexamination Certificate

active

07343480

ABSTRACT:
A register file bit includes a primary latch and a secondary latch with a feedback path and a context switch mechanism that allows a fast context switch when execution changes from one thread to the next. A bit value for a second thread of execution is stored in the primary latch, then transferred to the secondary latch. The bit value for a first thread of execution is then written to the primary latch. When a context switch is needed (when the first thread stalls and the second thread needs to begin execution), the register file bit can perform a context switch from the first thread to the second thread in a single clock cycle. The register file bit contains a backup latch inside the register file itself so that minimal extra wire paths are needed to or from the existing register file.

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Microsoft Computer Dictionary, 1999, Microsoft Press, Fourth Edition, p. 50.

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