libpfm_intel_snbep_unc_qpi(3) — Linux manual page

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

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

NAME top

       libpfm_intel_snbep_unc_qpi - support for Intel Sandy Bridge-EP QPI
       uncore PMU

SYNOPSIS top

       #include <perfmon/pfmlib.h>

       PMU name: snbep_unc_qpi0, snbep_unc_qpi1
       PMU desc: Intel Sandy Bridge-EP QPI uncore PMU

DESCRIPTION top

       The library supports the Intel Sandy Bridge Power QPI uncore PMU.
       This PMU model only exists on Sandy Bridge model 45. There are two
       QPI PMUs per processor socket.

MODIFIERS top

       The following modifiers are supported on Intel Sandy Bridge QPI
       uncore PMU:

       i      Invert the meaning of the event. The counter will now count
              QPI cycles in which the event is not occurring. This is a
              boolean modifier

       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 QPI 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].

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
       2025-02-02.  (At that time, the date of the most recent commit
       that was found in the repository was 2025-01-27.)  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

                               August, 2012                     LIBPFM(3)