1LIBPFM(3)                  Linux Programmer's Manual                 LIBPFM(3)
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NAME

6       libpfm_intel_bdx_unc_qpi  -  support  for  Intel  Broadwell Server  QPI
7       uncore PMU
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SYNOPSIS

10       #include <perfmon/pfmlib.h>
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12       PMU name: bdx_unc_qpi0, bdx_unc_qpi1
13       PMU desc: Intel Broadwell Server QPI uncore PMU
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DESCRIPTION

17       The library supports the Intel Broadwell Server QPI uncore  PMU.   This
18       PMU model only exists on various Broadwell server models (79, 86).
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MODIFIERS

22       The  following  modifiers  are supported on Broadwell server QPI uncore
23       PMU:
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25       e      Enable edge detection, i.e., count only when there  is  a  state
26              transition  from  no  occurrence  of  the  event to at least one
27              occurrence. This modifier must be combined with a threshold mod‐
28              ifier (t) with a value greater or equal to one.  This is a bool‐
29              ean modifier.
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31       t      Set the threshold value. When  set  to  a  non-zero  value,  the
32              counter  counts  the number of QPI cycles in which the number of
33              occurrences of the event is greater or equal to  the  threshold.
34              This is an integer modifier with values in the range [0:255].
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36       i      Invert  the meaning of the threshold or edge filter. If set, the
37              event counts when strictly less than  N  occurrences  occur  per
38              cycle if threshold is set to N. When invert is set, then thresh‐
39              old must be set to non-zero value. If set, the event counts when
40              the  event  transitions from occurring to not occurring (falling
41              edge) when edge detection is set. This is a boolean modifier
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AUTHORS

45       Stephane Eranian <eranian@gmail.com>
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49                                  June, 2017                         LIBPFM(3)