problem about likwid-Collection of common programming errors

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  Charles
  java optimization assembly likwid
  I have an unusual case where I’m examining a relatively trivial Java which should have well predicted branching behavior, but likwid-perfctr reports a huge (50%) branch mispredict rate. However, the runtime is not consistent with that misprediction rate (CPI is very low, at ~0.3, and stalls on the front and back end are low). A similar C++ program suffers no mispredicts but actually has a slightly longer runtime.It seems that the discrepancy is in BR_MISP_RETIRED_ALL_BRANCHES versus BR_MISP_EX

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