Translation Look aside Buffer

Question

Describe in detail the Translation Look aside Buffer (TLB)?

Answer 1

In a cached system, the base addresses of the last few referenced pages are maintained in the registers termed as the TLB which aids in faster lookup. TLB includes those page-table entries which have been most recently employed. Generally, each virtual memory reference causes two physical memory accesses-- one to fetch suitable page-table entry, and one to fetch the desired data. By using the TLB in-between, this is decreased to just one physical memory access in cases of TLB-hit.