libpfm_intel_ivb_unc - support for Intel Ivy Bridge uncore PMU

       Stephane Eranian <eranian@gmail.com>

                                                   June, 2013                                          LIBPFM(3)

       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.

       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.

       libpfm_intel_ivb_unc - support for Intel Ivy Bridge uncore PMU

#include<perfmon/pfmlib.h>PMUname:ivb_unc_cbo0,ivb_unc_cbo1,ivb_unc_cbo2,ivb_unc_cbo3PMUdesc:IntelIvyBridgeC-boxuncore