SHORT L2 TLB misses EVENTSET PMC0 LONG_DATA_PAGE_WALK PMC1 DATA_READ_OR_WRITE METRICS Runtime (RDTSC) [s] time L2 TLB misses [misses/s] PMC0/time L2 TLB miss ratio PMC0/PMC1 LONG Formulas: L2 TLB misses [misses/s] = LONG_DATA_PAGE_WALK/time L2 TLB miss ratio = LONG_DATA_PAGE_WALK/DATA_READ_OR_WRITE - This performance group measures the L2 TLB misses. A L2 TLB miss has a penelty of at least 100 cycles, hence it is important to avoid them. A high ratio can indicate trashing because when multiple pages are accessed in a loop iteration, the size and associativity is not sufficient to hold all pages. This would also result in a bad ratio for the L1 TLB.