[問題] 計組(中山97)

[rednim (純喫茶)]

A 2.0 GHz microprocessor runs a program of 1000 assembly instructions.
Given the following assumptions:
(a)all the instructions are 32-bit long and they all use immediate addressing
   mode.
(b)one memory location can accommedate one 32-bit instruction.
(c)an address or data bus cycle will take 2 CPU cycles.
(d)address bus and data bus are both 16-bit wide.
(e)after an instruction is fetched from memory to instruction register,it
   requires 1 cycle for instruction decoding,2 cycles for instruction
   execution,and 1cycle for storing the result to register.
(f)no instruciont pipelining allowed.

問CPI是多少?

看解答有些疑惑，想問一下。

解答是CPI=10

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◆ From: 60.198.3.4
推 HolyXie:感覺CPI=8  可以請問為什麼是10嗎?
推 s987692:跟樓上感覺一樣,湊不出十..
instruction fetch需          2     +  2*2  = 6
                    (send address)    (32-bits需傳兩次)
=>CPI=6+1+2+1=10
這樣有對嗎?
各位的算法是怎麼樣勒??
※ 編輯: rednim          來自: 60.198.3.4           (03/23 19:42)
推 s987692:send address為什麼是2
→ rednim:這是解答上的答案@@
推 s987692:這是資工所的嗎? 還是電機?
→ rednim:這電機的