libpfm_intel_skx_unc_m2m(3) — Linux manual page


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

NAME         top

       libpfm_intel_skx_unc_m2m - support for Intel Skylake X Server M2M
       uncore PMU

SYNOPSIS         top

       #include <perfmon/pfmlib.h>

       PMU name: skx_unc_m2m[0-1]
       PMU desc: Intel Skylake X Server Mesh-2-Memory uncore PMU

DESCRIPTION         top

       The library supports the Intel Skylake X server system
       configuration unit M2M uncore PMU.

MODIFIERS         top

       The following modifiers are supported on Intel Skylake X server
       M2M 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 HA 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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                              January, 2018                    LIBPFM(3)