A memory system has the following characteristics access tim

A memory system has the following characteristics access times: cache, 100 ns; main memory, 1000 ns; TLB, 40 ns; and secondary storage, 3000 ns. The page table is in main memory, and the page-table search requires only one access to the main memory. Determine the minimum and maximum access times for the memory system

Solution

Minimum access time : This will occur when the page table is in main memory and required page is not in memory

=main memory access time +cache + secondary storage

=1000 +100+3000

=4100 ns

maximum access time: this will happen when required page table and page is not in memory.

==main memory access time +cache +TLB+ secondary storage

=1000+100+40+3000 => 4140 ns