libpfm_intel_ivbep_unc_qpi — support for Intel Ivy Bridge-EP QPI uncore PMU


#include <perfmon/pfmlib.h>

PMU name: ivbep_unc_qpi0, ivbep_unc_qpi1
PMU desc: Intel Ivy Bridge-EP QPI uncore PMU


The library supports the Intel Ivy Bridge Power QPI uncore PMU. This PMU model only exists on Ivy Bridge model 62.


The following modifiers are supported on Intel Ivy Bridge QPI uncore PMU:


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.


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].


Stephane Eranian <>


February, 2014 Linux Programmer's Manual