Which of the following mappings is not used for the cache-mapping process?

Concept

Cache block placement and virtual-address translation solve different problems. Cache mapping chooses a cache location for a main-memory block, whereas virtual-memory mapping translates a process virtual address into a physical address.

Application

Direct, fully associative, and set-associative mapping are the three standard cache-placement organizations. Segmented-page mapping combines segmentation and paging for virtual-memory address translation, so it belongs to a different memory-management mechanism.

Contrast

• Associative mapping allows a main-memory block to occupy any cache line and compares tags in parallel.

• Direct mapping computes exactly one cache-line index from the main-memory block number.

• Set-associative mapping computes one set and then permits placement in any way within that set.

• Segmented-page mapping uses segment and page-table information to translate a virtual address into a physical address.

Cross-check

Check the output of each mapping: a cache mapping selects a cache line or set, while segmented-page mapping produces a physical-memory address through address translation.

Result

Therefore, Segmented - page mapping is not used for the cache-mapping process.