Suppose that in 1000 memory references there are 100 misses

Suppose that in 1000 memory references there are 100 misses in the first level cache and 10 misses in the second level cache.

a) What is the miss rate (local or global) for the first level (L1)?

b) What is the miss rate (local) for the second level (L2)?

Solution

a) Local and global miss rate for L1 = number of misses/ number of memory references

= 100/1000 = 10%

b)Local miss rate for L2 = number of misses in L2/number of misses in L1

=10/100 = 10%