Q53

Consider a paging system that uses $1$-level page table residing in main memory and a $\textsf{TLB}$ for address translation. Each main memory access takes $100$ ns and $\textsf{TLB}$ lookup takes $20$ ns. Each page transfer to/from the disk takes $5000$ ns. Assume that the $\textsf{TLB}$ hit ratio is $95 \%$, page fault rate is $10 \%$. Assume that for $20 \%$ of the total page faults, a dirty page has to be written back to disk before the required page is read from disk. $\textsf{TLB}$ update time is negligible. The average memory access time in ns (round off to $1$ decimal places) is ___________