[理工] 計組-請教一個句子
這是台大資工的題目...不過有一段話看不太懂..題目有點長..
Consider a system with an average memory access time of 50ns,
a three level page table(meta-directory, directory, and page table).For
full credit, your answer must be a single number and not a formula.
a)....省略
b)Now assume the system has no page faults , we are considering adding a
TLB that will take 1ns to lookup an address translation.
What hit rate in the TLB is required to reduct the effective access time
to memory by a factor of 2.5?
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
請教一下，最後劃線的地方，這句話是什麼意思呢??
謝謝幫忙
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