Question

The access time of a cache memory is 100ns and that of main memory
1000ns. It is estimated that 80% of the memory requests are for read and
the remaining 20% for write. The hit ratio for read accesses only is 0.9. A
write-through procedure is used. What is the average access time of the
system considering only memory read cycles? What is the average access
time of the system for both read and write requests? What is the hit ratio
taking into consideration the write cycles?

Answer 1

Answer:

The access time of a cache memory is 100 ns and that of main memory is 1000 ns. It is estimated that 80% of the memory requests are for read and the remaining 20% are for write. The hit ratio for read accesses only is 0.9