Pipeline bubble compression in a computer system

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

G - Physics

06

F

354/226, 354/230

G06F 9/38 (2006.01)

Patent

CA 1320275

PIPELINE BUBBLE COMPRESSION IN A COMPUTER SYSTEM 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 this 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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