Re: [理工] [計組] 98雲科資工

看板Grad-ProbAsk作者 (Ayo)時間15年前 (2011/03/12 22:43), 編輯推噓2(202)
留言4則, 2人參與, 最新討論串2/2 (看更多)
※ 引述《focus78612 ()》之銘言: : One cache system has 8 blocks that are initialized in empty. : The size of cache block is 4-byte. The cache system uses : two-way set associated architecture and LRU (least recently : used) policy is used as replacement algorithm. When a set is : referenced, way 0 is used first. Here is a series of address : references: 1, 5, 8, 3, 40, 17, 19, 56, 49, 43. Please reference : in the list as hit or miss? : sol: : address: 1 5 8 3 40 17 19 56 49 43 : M.M.block: 0 1 2 0 10 4 4 14 12 10 : set no.: 0 1 2 0 2 0 0 2 0 2 : H/M: M M M H M M H M M H : Hit:3 : Miss:7 : 我不清楚的地方是set no.跟Hit/Miss怎麼判斷 : 會的高手可以教我一下嗎 : 謝謝 M.M. block = address div 4 set no. = M.M. block mod 4 4不是固定的,要用block數和set去算(有點忘了,可以請其他高手補充) 如果set no. 和 M.M.block 都一樣就是Hit 以address 1 來說是 0,0 address 3 也是 0,0 就算hit -- ※ 發信站: 批踢踢實業坊(ptt.cc) ◆ From: 182.234.4.96

03/12 23:02, , 1F
懂了 非常感謝
03/12 23:02, 1F

03/12 23:25, , 2F
想請問 如果採其他策略(如FIFO的話) 會差在哪呢?
03/12 23:25, 2F

03/12 23:36, , 3F
每一個set裡面都有數個block,替換法則只有在這個set
03/12 23:36, 3F

03/12 23:36, , 4F
中的block都滿了以後才會使用
03/12 23:36, 4F
文章代碼(AID): #1DUuPweB (Grad-ProbAsk)
文章代碼(AID): #1DUuPweB (Grad-ProbAsk)