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Data Cache Misses on Bobcat

Question asked by ebaron on Mar 29, 2012
Latest reply on Apr 3, 2012 by fswehosky

I'm trying to get an accurate reading of L1 Data cache misses on my E-350 processor. The document "Basic Performance Measurements for AMD Athlon™ 64, AMD Opteron™ and AMD Phenom™ Processors" has been useful in interpreting results from OProfile. The document states that the event 0x41, DATA_CACHE_MISSES, can be inaccurate. The more precise method is adding the results from events 0x42, DC_refills_L2, and 0x43, DC_refills_sys. In the 14h BKDG, event 0x42 is now called DATA_CACHE_REFILLS_FROM_L2_OR_NORTHBRIDGE, and 0x43 is DATA_CACHE_REFILLS_FROM_NORTHBRIDGE.


Does event 0x42 now include the misses measured by 0x43? That is, should I only use results from 0x43, or the sum of 0x42 and 0x43?