NAME

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

SYNOPSIS

       #include <perfmon/pfmlib.h>

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

DESCRIPTION

       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

       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

       Stephane Eranian <eranian@gmail.com>

                                           August, 2012                                 LIBPFM(3)