1. A computer has a cache memory and a main memory with the following features: Memory cache access time: 4 ns Main memory access time: 80 ns The time needed to load a line in cache is 120 ns. Write-through policy. If the hit ratio in this computer is 95 % and the 90% of the memory accesses are read operations, what is the average access time?

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A computer has a cache memory and a main memory with the following features:

  • Memory cache access time: 4 ns
  • Main memory access time: 80 ns
  • The time needed to load a line in cache is 120 ns.
  • Write-through policy.

If the hit ratio in this computer is 95 % and the 90% of the memory accesses are read operations, what is the average access time?

1. A computer has a cache memory and a main
memory with the following features:
Memory cache access time: 4 ns
Main memory access time: 80 ns
The time needed to load a line in cache is 120
ns.
Write-through policy.
If the hit ratio in this computer is 95 % and the
90% of the memory accesses are read
operations, what is the average access time?
Transcribed Image Text:1. A computer has a cache memory and a main memory with the following features: Memory cache access time: 4 ns Main memory access time: 80 ns The time needed to load a line in cache is 120 ns. Write-through policy. If the hit ratio in this computer is 95 % and the 90% of the memory accesses are read operations, what is the average access time?
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