Pipeline bubble compression in a computer system

Details Pipeline bubble compression in a computer system Pipeline bubble compression in a computer system

1988-07-20

1991-05-28

Shaw, Gareth D.

Boots, shoes, and leggings

364263, 3642318, 3642624, 3642715, G06F 938

Patent

active

050199676

ABSTRACT:
Bubble compression in a pipelined central processing unit (CPU) of a computer system is provided. A bubble represents a stage in the pipeline that cannot perform any useful work due to the lack of data from an earlier pipeline stage. When a particular pipeline stage has stalled, the CPU instructions that have already passed through the stage continue to move ahead and leave behind vacant stages or bubbles. If a bubble is introduced into a pipeline and the pipeline subsequently stalls, the disclosed CPU takes advantage of this stalled condition to compress the previously introduced bubble.

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