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⟩ on 2017-07-05.  If you dis‐
       cover 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)