Bubble (computing)

（重定向自Pipeline stall）

In computing, a bubble or pipeline stall is a delay in execution of an instruction in an instruction pipeline in order to resolve a hazard.

During the decoding stage, the control unit will determine if the decoded instruction reads from a register that the instruction currently in the execution stage writes to. If this condition holds, the control unit will stall the instruction by one clock cycle. It also stalls the instruction in the fetch stage, to prevent the instruction in that stage from being overwritten by the next instruction in the program.

单词	Pipeline stall
释义	Pipeline stall 英语百科 Bubble (computing) （重定向自Pipeline stall） In computing, a bubble or pipeline stall is a delay in execution of an instruction in an instruction pipeline in order to resolve a hazard. During the decoding stage, the control unit will determine if the decoded instruction reads from a register that the instruction currently in the execution stage writes to. If this condition holds, the control unit will stall the instruction by one clock cycle. It also stalls the instruction in the fetch stage, to prevent the instruction in that stage from being overwritten by the next instruction in the program.
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