Managing cache

Cache line is stored in cache slot:

Actual data: cache line (data block)

Offset: k-bit address of data within cache line

V: valid bit

D: dirty bit

If data block valid, D = 1 indicates data has been modified since put in cache

Tag: upper 32-k bits

Number of bits per cache slot in this example:

2 bits for V and D + 27 bits for tag + 32 * 8 bits for data = 285