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libpfm_intel_skx_unc_iio(3) — Linux manual page

LIBPFM(3)               Linux Programmer's ManualLIBPFM(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:eEnable 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.tSet 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].iInvert 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 theperfmon2 (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       2025-08-11.  (At that time, the date of the most recent commit       that was found in the repository was 2025-06-29.)  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 isnot part of the original manual page), send a       mail to man-pages@man7.org                              January, 2018LIBPFM(3)

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