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)