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30 lines
1.2 KiB
Plaintext
30 lines
1.2 KiB
Plaintext
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SHORT L2 cache bandwidth in MBytes/s
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EVENTSET
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PMC0 DATA_CACHE_REFILLS_ALL
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PMC1 DATA_CACHE_REFILLS_SYSTEM
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PMC2 CPU_CLOCKS_UNHALTED
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METRICS
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Runtime (RDTSC) [s] time
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L2 bandwidth [MBytes/s] 1.0E-06*(PMC0-PMC1)*64.0/time
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L2 data volume [GBytes] 1.0E-09*(PMC0-PMC1)*64.0
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Cache refill bandwidth System/L2 [MBytes/s] 1.0E-06*PMC0*64.0/time
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Cache refill bandwidth System [MBytes/s] 1.0E-06*PMC1*64.0/time
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LONG
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Formulas:
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L2 bandwidth [MBytes/s] = 1.0E-06*(DATA_CACHE_REFILLS_ALL-DATA_CACHE_REFILLS_SYSTEM)*64/time
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L2 data volume [GBytes] = 1.0E-09*(DATA_CACHE_REFILLS_ALL-DATA_CACHE_REFILLS_SYSTEM)*64
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Cache refill bandwidth system/L2 [MBytes/s] = 1.0E-06*DATA_CACHE_REFILLS_ALL*64/time
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Cache refill bandwidth system [MBytes/s] = 1.0E-06*DATA_CACHE_REFILLS_SYSTEM*64/time
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-
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Profiling group to measure L2 cache bandwidth. The bandwidth is
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computed by the number of cache line loaded from L2 to L1 and the
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number of modified cache lines evicted from the L1.
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Note that this bandwidth also included data transfers due to a
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write allocate load on a store miss in L1 and copy back transfers if
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originated from L2. L2-L2 data volume is the total data volume transferred
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between L2 and L1.
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