libpfm_intel_bdx_unc_r2pcie(3) — Linux manual page


LIBPFM(3)               Linux Programmer's Manual              LIBPFM(3)

NAME         top

       libpfm_intel_bdx_unc_r2pcie - support for Intel Broadwell Server
       R2 PCIe  uncore PMU

SYNOPSIS         top

       #include <perfmon/pfmlib.h>

       PMU name: bdx_unc_r2pcie
       PMU desc: Intel Broadwell Server R2 PCIe uncore PMU

DESCRIPTION         top

       The library supports the Intel Broadwell server R2 PCIe uncore
       PMU.  This PMU model only exists on Broadwell server models (79,

MODIFIERS         top

       The following modifiers are supported on Intel Broadwell server
       R2PCIe uncore PMU:

       e      Enable edge detection, i.e., count only when there is a
              state transition from no occurrence of the event to at
              least one occurrence. This modifier must be combined with
              a threshold modifier (t) with a value greater or equal to
              one.  This is a boolean modifier.

       t      Set the threshold value. When set to a non-zero value, the
              counter counts the number of R2PCIe 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].

       i      Invert the meaning of the threshold or edge filter. If
              set, the event counts when strictly less than N
              occurrences occur per cycle if threshold is set to N. When
              invert is set, then threshold must be set to non-zero
              value. If set, the event counts when the event transitions
              from occurring to not occurring (falling edge) when edge
              detection is set. This is a boolean modifier

AUTHORS         top

       Stephane Eranian <>

COLOPHON         top

       This page is part of the perfmon2 (a performance monitoring
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                               June, 2017                      LIBPFM(3)