NAME

       libpfm_intel_x86_arch - support for Intel X86 architectural PMU

SYNOPSIS

       #include <perfmon/pfmlib.h>

       PMU name: ix86arch
       PMU desc: Intel X86 architectural PMU

DESCRIPTION

       The library supports any processor implementing the Intel architectural PMU. This is a minimal PMU with a
       variable  number  of  counters  but  predefined set of events. It is implemented in all recent processors
       starting with Intel Core Duo/Core Solo.

       It acts as a default PMU support in case the library is run on a very  recent  processor  for  which  the
       specific support has not yet been implemented.

MODIFIERS

       The following modifiers are supported on Intel architectural PMU:

       u      Measure at user level which includes privilege levels 1, 2, 3. This corresponds to PFM_PLM3.  This
              is a boolean modifier.

       k      Measure at kernel level which includes privilege level 0. This corresponds to PFM_PLM0.  This is a
              boolean modifier.

       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.  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].

       t      Measure  on  both  threads  at  the  same  time assuming hyper-threading is enabled. This modifier
              requires at least version 3 of the architectural PMU. This is a boolean modifier.

AUTHORS

       Stephane Eranian <eranian@gmail.com>

                                                 September, 2009                                       LIBPFM(3)