L2missrate
L2 miss rate is a measure used in computer architecture to indicate how often an access to the L2 cache misses. It is the fraction of L2 cache accesses that do not find the requested data in the L2 cache and must be fetched from a higher level of memory hierarchy. It is commonly expressed as a percentage or, in performance analysis, as misses per thousand instructions (MPKI).
Calculation and interpretation. The L2 miss rate is computed as misses_L2 divided by accesses_L2. For example,
Factors and relationships. The L2 miss rate depends on cache size, associativity, line size, and replacement
Measurement and use. Analysts measure L2 miss rate using hardware performance counters, performance modeling, or simulators.