What‘s my CPU's strategy to guarantee cache consistency?

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Currently, CPUs has multiple cores, and each core has its own cache(s). There are some method to make sure the cache consistency like snooping cache consistency protocol and directory based cache consistency protocol. I don't know what my real CPU uses to make sure cache consistency. It is Intel(R) COre(TM) i7-8550U CPU @1.8GHz. Thanks!

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