libpfm_intel_skx_unc_imc(3) — Linux manual page


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

NAME         top

       libpfm_intel_skx_unc_imc - support for Intel Skylake X Server
       Integrated Memory Controller (IMC)  uncore PMU

SYNOPSIS         top

       #include <perfmon/pfmlib.h>

       PMU name: skx_unc_imc[0-7]
       PMU desc: Intel Skylake X Server IMC uncore PMU

DESCRIPTION         top

       The library supports the Intel Skylake X Server Integrated Memory
       Controller (IMC) uncore PMU.

MODIFIERS         top

       The following modifiers are supported on Intel Skylake X server
       IMC 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 IMC 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
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                              January, 2018                    LIBPFM(3)