PPT Slide
Translation Lookaside Buffer
- Common theme: throw more hardware at the problem! Use a hardware caching mechanism to keep most-recently used page table entries in “fast” parallel search registers.
- Translation Lookaside Buffer (TLB) - set of associative registers containing page table entries, the contents of which can be searched in parallel.
- TLB flow chart: Figure 11.11.
- TLB operation with logical address mapping & page table: Figure 11.13.
- Cache hit - page entry found in TLB
- Cache miss - page entry not in TLB; resort to memory page table.