本文深入探讨了CPU微架构中的关键概念uOps（微指令）和Pipeline Slots，解释了它们如何影响处理器的性能。uOps是CPU前端解码的低级硬件操作，而Pipeline Slots则代表了处理uOps所需的硬件资源。文章通过实例展示了Pipeline Slots的阻塞如何降低代码执行效率。
[uOps]
Metric Description
uOp, or micro-op, is a low-level hardware operation. The CPU Front-End is responsible for fetching the program code represented in architectural instructions and decoding them into one or more uOps.
uOps
micro-ops，micro-operations，微指令，是一种底层硬件操作，CPU前端负责获取体系结构指令中表示的程序代码，并将其解码为一个或多个uops。
Pipeline Slots
Metric Description
A pipeline slot represents hardware resources needed to process one uOp.
The Top-Down Characterization assumes that for each CPU core, on each clock cycle, there are several pipeline slots available. This number is called Pipeline Width.
In the example below, there is a 4-wide CPU that executes code for 10 clock cycles:
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