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java顶级内功心法(1） —— 可见性、MESI、volatile精讲（8000字由浅入深）（2）

三、独木难支的MESI经过上面的内容，大家应该知道了数据在CPU缓存和主内存这些介质间流转的流程了。按照道理讲，MESI协议已经解决了多核心间缓存的一致性问题了，为什么我还继续说有问题呢？其实答案很简单，对于用户代码而言，我们更关注线程间的可见性，并不是核心缓存数据的一致性，而仅靠ME...

java顶级内功心法(1） —— 可见性、MESI、volatile精讲（8000字由浅入深）（1）

前言volatile是我们在学习java线程方面的内容时，经常被提到的一个词，很多人知道他与可见性有关，看过《深入了解java虚拟机的》同学也许能讲得更多点，如禁止指令重排序等。但如果更深入一点：可见性是什么，volatile在java中是如何实现的? 恐怕会陷入混乱了。这次我们就好好聊聊可见性和...

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【Java 并发编程】线程共享变量可见性 ( volatile 关键字使用场景分析 | MESI 缓存一致性协议 | 总线嗅探机制 )

文章目录一、volatile 关键字场景分析二、缓存一致性协议 ( 总线嗅探机制 )一、volatile 关键字场景分析volatile 关键字使用场景 :public class Main { private static volatile boolean flag = false; privat...

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