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第六章书430页，高速缓存命中这块看不明白 #42

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luoqqsh opened this issue Jun 23, 2020 · 0 comments
Open

第六章书430页，高速缓存命中这块看不明白 #42

luoqqsh opened this issue Jun 23, 2020 · 0 comments

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@luoqqsh
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luoqqsh commented Jun 23, 2020

430页这里写的1读地址0的字，还勉强理解，到了下面的读取地址1，13，8，0这里说的缓存命中看不明白。
我的疑问，
1缓存是否有效和是否命中有关系吗？无效就一定不命中吗？
2这里的有效位标记位分别啥意思？命中是简单的是否存在的意思吗？
3书上的这个事例是否需要参考上面的表6-30？
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