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

6       libpfm_intel_snb_unc - support for Intel Sandy Bridge uncore PMU
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SYNOPSIS

9       #include <perfmon/pfmlib.h>
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11       PMU name: snb_unc_cbo0, snb_unc_cbo1, snb_unc_cbo2, snb_unc_cbo3
12       PMU desc: Intel Sandy Bridge C-box uncore
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DESCRIPTION

16       The  library  supports  the  Intel  Sandy Bridge client part (model 42)
17       uncore PMU.  The support is currently limited to the Coherency Box,  so
18       called C-Box for up to 4 physical cores.
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20       Each physical core has an associated C-Box which it uses to communicate
21       with the L3 cache. The C-boxes all support the same set of events. How‐
22       ever,  Core  0 C-box (snb_unc_cbo0) supports an additional uncore clock
23       ticks event: UNC_CLOCKTICKS.
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MODIFIERS

28       The following modifiers are  supported  on  Intel  Sandy  Bridge  C-Box
29       uncore PMU:
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31       i      Invert  the  meaning  of  the  event. The counter will now count
32              cycles in which the event is not occurring. This  is  a  boolean
33              modifier
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35       e      Enable  edge  detection,  i.e., count only when there is a state
36              transition from no occurrence of  the  event  to  at  least  one
37              occurrence.  This  modifier must be combined with a counter mask
38              modifier (m) with a value greater or equal to one.   This  is  a
39              boolean modifier.
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41       c      Set  the  counter  mask value. The mask acts as a threshold. The
42              counter will count the number of cycles in which the  number  of
43              occurrences  of  the event is greater or equal to the threshold.
44              This is an integer modifier with values in the range [0:255].
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47       Both the UNC_CBO_CACHE_LOOKUP and  UNC_CBO_XSNP_RESPONSE  requires  two
48       umasks  to  be valid.  For UNC_CBO_CACHE_LOOKUP the first umask must be
49       one of the MESI state umasks, the second has to be one of the  filters.
50       For  UNC_CBO_XSNP_RESPONSE  the  first  umask  must be one of the snoop
51       types, the second has to be one of the filters.
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AUTHORS

55       Stephane Eranian <eranian@gmail.com>
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59                                 August, 2012                        LIBPFM(3)