The performence of memory is frequently mesuread in terms
of quntity is called hit ratio.when the cpu needs to find
the word in the cache,if the word is found in the cache
then its proudes a hit.if the word is not found in the
cache,it is in main memory as counted miss.the ratio of
number of hits is divided by the total cpu refrence of
memory is called hit ratio.
Hit ratio is a concept defined for any two adjacent level of
memory hierarchy. The hit ratios at successive levels are
function of memory capacities, management policies and
program behavior. Hit ratios always lies between 0 to 1.
The performance of cache memory is measured in terms of hit ratio.If a data item requested by cpu is found in the cache,it is called a hit.If the requested data item is not found,it is called a miss.hit ratio is the ratio of number of hitsdivided by total requests