Method and apparatus for reducing number of cycles required...

Details Method and apparatus for reducing number of cycles required... Method and apparatus for reducing number of cycles required...

2005-05-27

2008-08-05

Duncan, Marc (Department: 2113)

Error detection/correction and fault detection/recovery

Data processing system error or fault handling

Reliability and availability

C714S010000, C712S228000

Reexamination Certificate

active

07409589

ABSTRACT:
A method and apparatus are provided for reducing the number of cycles required to checkpoint instructions in a multi-threaded microprocessor that has dispatch group checkpointing. A determination is made in a first stage of a checkpoint pipeline whether checkpointing can occur for a group of instructions. The results of processing the group of instructions flow to a second stage of the checkpoint pipeline regardless of whether the group of instructions is ready to checkpoint. If the group of instructions is ready to checkpoint, the group of instructions is checkpointed in a third stage of the checkpoint pipeline.

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