anchor.diff:  #
   PRESET,PAPI_TLB_IM,NOT_DERIVED,ITLB_MISSES:ANY
   PRESET,PAPI_TLB_DM,NOT_DERIVED,DTLB_MISSES:ANY
  +PRESET,PAPI_TLB_TL,DERIVED_ADD,ITLB_MISSES:ANY, DTLB_MISSES:ANY
   #
   PRESET,PAPI_BR_TKN,NOT_DERIVED,BR_INST_EXEC:TAKEN
   PRESET,PAPI_BR_NTK,DERIVED_SUB,BR_INST_EXEC:ANY, BR_INST_EXEC:TAKEN
  
positive.code: PRESET,PAPI_L2_DCA,NOT_DERIVED,L2_DATA_RQSTS:ANY
  PRESET,PAPI_L2_DCR,DERIVED_SUB,L2_RQSTS:LOADS, L2_RQSTS:IFETCHES
  #PRESET,PAPI_L2_DCW,NOT_DERIVED,L2_ST:SELF:MESI
  PRESET,PAPI_L2_ICH,DERIVED_SUB,L2_RQSTS:IFETCH_HIT
  PRESET,PAPI_L2_ICA,NOT_DERIVED,L2_RQSTS:IFETCHES
  PRESET,PAPI_L2_TCH,DERIVED_SUB,L2_RQSTS:REFERENCES, L2_RQSTS:MISS
  PRESET,PAPI_L2_TCA,NOT_DERIVED,L2_RQSTS:REFERENCES
  
negative.code: #
  PRESET,PAPI_L1_ICM,NOT_DERIVED,L1I:MISSES
  PRESET,PAPI_L1_ICA,NOT_DERIVED,L1I:READS
  PRESET,PAPI_L1_ICH,NOT_DERIVED,L1I:HITS
  #PRESET,PAPI_L1_DCM,NOT_DERIVED,L1D_REPL
  PRESET,PAPI_L1_DCA,NOT_DERIVED,L1D_ALL_REF:ANY
  #PRESET,PAPI_L1_DCH,DERIVED_SUB,L1D_ALL_REF,L1D_REPL
  