Consider a system with a two-level paging scheme in which a regular memory access takes 150 ns and servicing a page fault takes 8 ms. An average instruction takes 100 ns of CPU time, and two memory accesses. The TLB hit ratio is 90%, and the page fault rate is one in every 10,000 instructions. What is the effective average instruction execution time?

Consider a system with a two-level paging scheme in which a regular me

1.	Consider a system with a two-level paging scheme in which a regular memory access takes 150 ns and servicing a page fault takes 8 ms. An average instruction takes 100 ns of CPU time, and two memory accesses. The TLB hit ratio is 90%, and the page fault rate is one in every 10,000 instructions. What is the effective average instruction execution time?
A.	645 ns
B.	1050 ns
C.	1215 ns
D.	1230 ns
Answer» E.

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