[理工] 計組 3Cs

[BaaaSwin (codown)]

If all misses classified into one of three categories-compulsory,capacity,
conflicnt-which misses are likely to be reduced when a program is rewritten
so as to require less memory?

ANS:
Less memory :fewer compulsory misses.


我不太了解題目的意思

為什麼不是capacity miss??

我想說少量記憶體所以cache的大小就相對變大,那麼capacitymiss不是會減少嗎??



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◆ From: 122.116.12.104
推 ddczx:強迫性失誤一定會變少,但容量失誤有可能因記憶體存取順序不
→ ddczx:同反而變大,例:重寫時row major改column major
→ ddczx:不過如果是複選題我應該也會選
→ BaaaSwin:存取順序不同而變大是存取的block剛好都不在cache中嗎??
推 ddczx:恩,或者可以想成常常要跳到記憶體中不同的block中找資料
→ BaaaSwin:恩恩謝謝你