[理工] [OS]請問有人會這題？ %in memory %in TLBs %in modified
請問有人會這題？
Assume that we have a demand paging system.
It takes 4 milliseconds to read or write a page to disk.
90% accessing a page is already in memory,
and 70% page-table references are found in the TLBs(that is 0.63 totally),
and 50% modified bits are dirty (that is, 0.05 totally).
Memory access time is 2 microsecond. What is the effective access time per memory reference?
(assume that finding a page-table entry in the TLBs takes 0.1 microsecond).
Show how derive your answer.
不知道題目給的(that is, ... totally)有沒有錯
不是應該是TLB沒打到才去找Memory再看看Memory裡面有沒有dirty?
謝謝！
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