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fix-typo: 文字遗漏 #2253

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fix-typo: 文字遗漏 #2253

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2 changes: 1 addition & 1 deletion docs/java/concurrent/java-concurrent-questions-02.md
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Expand Up @@ -317,7 +317,7 @@ CAS 经常会用到自旋操作来进行重试，也就是不成功就一直循
如果 JVM 能支持处理器提供的 pause 指令那么效率会有一定的提升，pause 指令有两个作用：

1. 可以延迟流水线执行指令，使 CPU 不会消耗过多的执行资源，延迟的时间取决于具体实现的版本，在一些处理器上延迟时间是零。
2. 可以避免在退出循环的时候因内存顺序冲而引起 CPU 流水线被清空，从而提高 CPU 的执行效率。
2. 可以避免在退出循环的时候因内存顺序冲突而引起 CPU 流水线被清空，从而提高 CPU 的执行效率。

#### 只能保证一个共享变量的原子操作

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