Your computer system looses power while you are working on a project for a very important client
2 answers:
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Answer:
a) 3.3
b) 3
Explanation:
1)
As we know ,
CPI = sum of ( instructions× clock cycle)
= 50%(1) + 30%(4) + 20%(8)
= 50% + 120% + 160%
= 330%
= = 3.3
⇒CPI = 3.3
2)
Let a = number of cycles on average
As given,
a 10% improvement in performance of P1,
⇒New CPI = 3
⇒3 = 50% + 30% (x) + 20%(8)
⇒3 = 50% + 30% (x) + 160%
⇒3 = 210% + 30%(x)
⇒3 = 2.1 + 0.3x
⇒3 - 2.1 = 0.3x
⇒0.9 = 0.3x
⇒x = = 3
⇒x = 3
∴ we get
Number of cycles on average = 3