[問題] OS-memory 計算..
Suppose that the virtual memory of a computer system adopts demand paging.
Assume that the effective memory access time without any page fault is 50ns
and the service time for a page fault is 15ms ,What is the maximum
acceptable page-fault rate for an effective access time of no more than
120ns (1ns=10^-9,and 1ms=10^-3)?
Answer:The maximum acceptable page fault rate is______
解答寫： (1-p)*50ns + p*(15ms+50ns)<120ns, 50ns可省略
請教一下，為什麼50ns可省略呢?
謝謝
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