libpfm_intel_skx_unc_iio(3) — Linux manual page

NAME \| SYNOPSIS \| DESCRIPTION \| MODIFIERS \| Filters \| AUTHORS \| COLOPHON

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

NAME top

       libpfm_intel_skx_unc_ubo - support for Intel Skylake X Server IIO
       uncore PMU

SYNOPSIS top

       #include <perfmon/pfmlib.h>

       PMU name: skx_unc_iio[0-5]
       PMU desc: Intel Skylake X Server IIO uncore PMU

DESCRIPTION top

       The library supports the Intel Skylake X server IIO uncore PMU.
       The IIO PMU is used to analyze I/O traffic from the PCIe
       controllers.

MODIFIERS top

       The following modifiers are supported on Intel Skylake X server
       IIO 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

Filters top

       Events UNC_IO_COMP_BUF_INSERTS, UNC_IO_DATA_REQ_BY_CPU,
       UNC_IO_DATA_REQ_OF_CPU, support additional filtering via a set of
       umasks tracking requests completions. They umasks start with a
       FC_ prefix.  The other filter is the port filter and it is
       hardcoded as umasks for the same events.

AUTHORS top

       Stephane Eranian <eranian@gmail.com>

COLOPHON top

       This page is part of the perfmon2 (a performance monitoring
       library) project.  Information about the project can be found at
       ⟨http://perfmon2.sourceforge.net/⟩.  If you have a bug report for
       this manual page, send it to
       perfmon2-devel@lists.sourceforge.net.  This page was obtained
       from the project's upstream Git repository
       ⟨git://git.code.sf.net/p/perfmon2/libpfm4 perfmon2-libpfm4⟩ on
       2024-06-14.  (At that time, the date of the most recent commit
       that was found in the repository was 2024-04-24.)  If you
       discover any rendering problems in this HTML version of the page,
       or you believe there is a better or more up-to-date source for
       the page, or you have corrections or improvements to the
       information in this COLOPHON (which is not part of the original
       manual page), send a mail to man-pages@man7.org

                              January, 2018                    LIBPFM(3)