Translation lookaside Buffer Each virtual memory reference can cause two physical memory accesses One to fetch the page table One to fetch the data To overcome this problem a high-speed cache is set up for page table entries Called a Translation Lookaside Buffer tlB) Contains page table entries that have been most recently used17 Translation Lookaside Buffer • Each virtual memory reference can cause two physical memory accesses – One to fetch the page table – One to fetch the data • To overcome this problem a high-speed cache is set up for page table entries – Called a Translation Lookaside Buffer (TLB) – Contains page table entries that have been most recently used