作者pipibabe (pipi)
看板Grad-ProbAsk
标题[问题] 2题计算机概论
时间Tue Apr 7 23:37:22 2009
1.
The execution time for one program is 100 ns,
and multiplication instruction takes 80% of the
execution time.If the new execution time is 25 ns,
how to improve the speed of multiplication instruction?
(A)2times (B)4times (C)8times (D)16 times (E)none of the above
2.One instruction cycle takes 40ns.Among them,
IF(10ns),DE(5ns),EXE(10ns),MEM(10ns),WB(5ns).
Assume 100 instruction,hoe many times is the speed of
pipelining method over traditional method?
(A)4.85 (B)2.85 (C)3.85 (D)3.95 (E)none of the above
请帮忙解题拜托了!
不知道要从何下手的两题...
谢谢
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1F：推 muta22:1. Amdahl's law (D) 04/08 10:25
2F：→ muta22:2. (C) 04/08 10:26