1LIBPFM(3)                  Linux Programmer's Manual                 LIBPFM(3)
2
3
4

NAME

6       libpfm_intel_snbep_unc_qpi  -  support  for  Intel  Sandy Bridge-EP QPI
7       uncore PMU
8

SYNOPSIS

10       #include <perfmon/pfmlib.h>
11
12       PMU name: snbep_unc_qpi0, snbep_unc_qpi1
13       PMU desc: Intel Sandy Bridge-EP QPI uncore PMU
14
15

DESCRIPTION

17       The library supports the Intel Sandy Bridge Power QPI uncore PMU.  This
18       PMU  model only exists on Sandy Bridge model 45. There are two QPI PMUs
19       per processor socket.
20
21

MODIFIERS

23       The following modifiers are supported on Intel Sandy Bridge QPI  uncore
24       PMU:
25
26       i      Invert  the meaning of the event. The counter will now count QPI
27              cycles in which the event is not occurring. This  is  a  boolean
28              modifier
29
30       e      Enable  edge  detection,  i.e., count only when there is a state
31              transition from no occurrence of  the  event  to  at  least  one
32              occurrence. This modifier must be combined with a threshold mod‐
33              ifier (t) with a value greater or equal to one.  This is a bool‐
34              ean modifier.
35
36       t      Set  the  threshold  value.  When  set  to a non-zero value, the
37              counter counts the number of QPI cycles in which the  number  of
38              occurrences  of  the event is greater or equal to the threshold.
39              This is an integer modifier with values in the range [0:255].
40
41

AUTHORS

43       Stephane Eranian <eranian@gmail.com>
44
45
46
47                                 August, 2012                        LIBPFM(3)