GATE - 2011 | OS | Let the page fault service time to 10 ms in a computer with average memory
Posted on 12-02-2022
GATE - 2011 [Operating System]
Question:
Let the page fault service time to 10 ms in a computer with average memory access time being 20 ns. If one page fault is generated for every 106 memory accesses, what is the effective access time for the memory?
|
A |
21 ns |
|
B |
30 ns |
|
C |
23 ns |
|
D |
35 ns |
Solution:
Option (B) is Correct.
P = page fault rate
EA = p × page fault service time + (1 – p) × Memory access time
=1/106×10×106+(1-1/106)×20
≅29.9 ns
Thank You