NAME

       libpfm_intel_ivb_unc - support for Intel Ivy Bridge uncore PMU

SYNOPSIS

       #include <perfmon/pfmlib.h>

       PMU name: ivb_unc_cbo0, ivb_unc_cbo1, ivb_unc_cbo2, ivb_unc_cbo3
       PMU desc: Intel Ivy Bridge C-box uncore

DESCRIPTION

       The  library supports the Intel Ivy Bridge client part (model 58) uncore PMU.  The support
       is currently limited to the Coherency Box, so called C-Box for up to 4 physical cores.

       Each physical core has an associated C-Box which it uses to communicate with the L3 cache.
       The  C-boxes  all  support  the  same  set of events. However, Core 0 C-box (snb_unc_cbo0)
       supports an additional uncore clock ticks event: UNC_CLOCKTICKS.

MODIFIERS

       The following modifiers are supported on Intel Ivy Bridge C-Box uncore PMU:

       i      Invert the meaning of the event. The counter will now count  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  counter mask modifier (m) with a value greater or equal to one.  This is a
              boolean modifier.

       c      Set the counter mask value. The mask acts as a threshold. The  counter  will  count
              the  number of 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].

       Both  the  UNC_CBO_CACHE_LOOKUP and UNC_CBO_XSNP_RESPONSE requires two umasks to be valid.
       For UNC_CBO_CACHE_LOOKUP the first umask must be one of the MESI state umasks, the  second
       has  to  be  one of the filters.  For UNC_CBO_XSNP_RESPONSE the first umask must be one of
       the snoop types, the second has to be one of the filters.

AUTHORS

       Stephane Eranian <eranian@gmail.com>

                                            June, 2013                                  LIBPFM(3)