NAME

       libpfm_intel_spr_unc_upi - support for Intel SapphireRapids Server UPI uncore PMU

SYNOPSIS

       #include <perfmon/pfmlib.h>

       PMU name: spr_unc_upi[0-3]
       PMU desc: Intel SapphireRapids UPI uncore PMU

DESCRIPTION

       The  library  supports  the  Intel SapphireRapids UPI (Ultra Path Interconnect) uncore PMU.  Each UPI PMU
       implements 4 generic counters.

MODIFIERS

       The following modifiers are supported on Intel SapphireRapids UPI uncore PMU:

       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  threshold  modifier  (t)
              with a value greater or equal to one.  This is a boolean modifier.

       t      Set  the  threshold  value.  When  set  to  a non-zero value, the counter counts the number of IRP
              clockticks 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].  i Invert the threshold (t) test
              from strictly greater than to less or equal to. This is a boolean modifier.

AUTHORS

       Stephane Eranian <eranian@gmail.com>

                                                  January, 2024                                        LIBPFM(3)