In an SISD architecture there is a single instruction cycle; operands are fetched serially into a single processing unit before execution.
在单指令流单数据流结构中，有单一的指令周期，在执行前，单个处理机按序取操作数。
It is the lightest as execution time, often a lock or unlock becomes just a single inlined assembler instruction.
就运行时间而言是最轻便的，大多数情况下只需要单条内联汇编指令就可以上锁或解锁。
It is the lightest as execution time, often a lock or unlock becomes just a single inlined assembler instruction.
就运行时间而言是最轻便的，大多数情况下只需要单条内联汇编指令就可以上锁或解锁。
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