NAME | SYNOPSIS | DESCRIPTION | MODIFIERS | AUTHORS | COLOPHON

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

NAME         top

       libpfm_intel_nhm_unc - support for Intel Nehalem uncore PMU

SYNOPSIS         top

       #include <perfmon/pfmlib.h>

       PMU name: nhm_unc
       PMU desc: Intel Nehalem uncore

DESCRIPTION         top

       The library supports the Nehalem uncore PMU as implemented by
       processors such as Intel Core i7, and Intel Core i5.

       The PMU is located at the socket-level and is therefore shared
       between the various cores. By construction it can only measure at all
       privilege levels.

MODIFIERS         top

       The following modifiers are supported on Intel Nehalem processors:

       i      Invert the meaning of the event. The counter will now count
              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. This is a boolean modifier.

       c      Set the counter mask value. The mask acts as a threshold. The
              counter will count the number of 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].

       o      Causes the queue occupancy counter associated with the event
              to be cleared (zeroed). This is a boolean modifier.

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 2017-05-03.  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

                               September, 2009                     LIBPFM(3)