推 kai5566:謝謝回答! 那其實1式不就是把mem access前的(1-p)去掉 01/19 18:01
→ kai5566:感覺答案加上(1-p)有點多此一舉耶~ 01/19 18:02
p: page fault ratio
q: modified ratio
EAT = (1-p)*(memory access time)
+ p*( q * cond1 + (1-q)* cond2 + memory access time) - (1)
^^^^^^^^^^^^^^ 與Cond1, Cond2比太小
= memory access time + p * (q *cond1 + (1-q)*cond2) - (2)
(1)若(1)可省去page fault時的memory access time，則得
EAT = (1-p)*(memory access time) + p*(q*cond + (1-q)*cond2) -(3)
(3)式為原原po之答案
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