$20$ nanoseconds, and TLB Hit ratio is $95\%.$

cess stages in page fault are shown as the following

read from the disk to a free frame.

c$.O$ in a queue for this device until the read request is serviced

d$.$ Restore system determines the location of the page on the disk instruction

e$.$ Trap to the operating system, operating system decides the trap a page fault, and check that the page reference is Invalid reference or Just not in memory

f$.$ Wait for the device seek and$/$or latency time

g$.$ Begin the transfer of the page to a free frame

h$.$ While waiting, allocate the CPU to some other user

i$.$ Receive an interrupt from the disk $\frac{\text{I}}{O}$ subsystem $($I$/$O completed$)$

j$.$ Save the user registers and process state for the page fault process,

k$.$ Save the registers and process state for the other user

Correct the page table and other tables to show page is now in memory.

m$.$ Write victim frame to disk if dirty

n$.$ Wait for the CPU to be allocated to this process again

o$.$ Determine that the interrupt was from the disk

p$.$ Find a free frame, if there is a free frame, use it;

q$.$ If there is no free frame, use a page replacement algorithm to select a victim frame

Please write the correct execution order. $(15$ points$)$