NAME libpfm_intel_nhm_unc - support for Intel Nehalem uncore PMU

SYNOPSIS

       #include <perfmon/pfmlib.h>

       PMU name: nhm_unc
       PMU desc: Intel Nehalem uncore

DESCRIPTION

       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

       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

       Stephane Eranian <eranian@gmail.com>

                                         September, 2009                                LIBPFM(3)