libpfm_intel_skx_unc_irp(3) — Linux manual page


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

NAME         top

       libpfm_intel_skx_unc_irp  -  support  for  Intel Broadwell Server IRP
       uncore PMU

SYNOPSIS         top

       #include <perfmon/pfmlib.h>

       PMU name: skx_unc_irp
       PMU desc: Intel Skylake X Server IRP uncore PMU

DESCRIPTION         top

       The library supports the Intel Skylake X Server IRP (IIO coherency)
       uncore PMU .

MODIFIERS         top

       The following modifiers are supported on Intel Skylake X server IRP
       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 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 [0:255].

       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 library)
       project.  Information about the project can be found at 
       ⟨⟩.  If you have a bug report for this
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       page was obtained from the project's upstream Git repository
       ⟨git:// perfmon2-libpfm4⟩ on
       2020-09-18.  (At that time, the date of the most recent commit that
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                                January, 2018                      LIBPFM(3)