先入先出队列(First Input First Output，FIFO)这是一种传统的按序执行方法，先进入的指令先完成并引退，跟着才执行第二条指令。-FIFO queue (First Input First Output, FIFO) which is a traditional sequential execution method, first enter the command to finish and retire, only to follow the implementatio

First Input First Output的缩写，先入先出队列，这是一种传统的按序执行方法，先进入的指令先完成并引退，跟着才执行第二条指令。-The abbreviation of the first input first output, the first in first out queue, which is a traditional sequential execution method, first enter the command to finish and retire