作者assassin88 (AI)
看板Grad-ProbAsk
標題[理工] [OS]-functionalist
時間Tue Jan 12 23:42:04 2010
Which of the functionalists listed below need to be supported by the operating
system for the folling two setting : (1)handheld devices (2)real-time system
恐龍 洪逸
(1) (2) (1) (2)
(a)Batch peogramming
(b)Virtual memory O O(←這個應該是錯的?)
(c)Time sharing O O
這一題是恐龍上面(ch.1)的習題,答案為左邊的版本。
但今天做到題目,洪逸書給的答案則是右邊的版本。
請問哪一種才是對的?
另外,有個填空..想不出來:
The virtual memory treats the main memory as a fully set associative cache
which uses ______ policy for handing write hits.
請指教~感謝!
--
※ 發信站: 批踢踢實業坊(ptt.cc)
◆ From: 61.57.78.152
※ 編輯: assassin88 來自: 61.57.78.152 (01/12 23:44)
推 killerjoe:write back? 01/13 00:32
→ killerjoe:抱歉好像不是 01/13 00:33
推 killerjoe:剛查一下又好像是@@ 01/13 00:37
推 converse2006:我記得的跟樓上一樣 不'過不確定 01/13 00:56
推 killerjoe:因為要寫穿(write through)到disk的代價太高 01/13 08:32
→ killerjoe:因此採用write back的方式 01/13 08:33