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