text: LIBPFM(3) Linux Programmer's Manual LIBPFM(3)
  libpfm_intel_ivbep_unc_r2pcie - support for Intel Ivy Bridge-EP R2 PCIe uncore PMU
  #include <perfmon/pfmlib.h> PMU name: ivbep_unc_r2pcie PMU desc: Intel Ivy Bridge-EP R2 PCIe uncore PMU
  The library supports the Intel Ivy Bridge R2 PCIe uncore PMU. This PMU model only exists on Ivy Bridge model 62.
  The following modifiers are supported on Intel Ivy Bridge R2PCIe2PCIe cycles in which the number of occurrences of the event is greater or equal to the threshold. This is an integer modifier with values in the range [0:15]. perfmon2-libpfm4⟩ on 2018-04-30. (At that time, the date of the most recent commit that was found in the repository)