NAME | SYNOPSIS | DESCRIPTION | MODIFIERS | AUTHORS | COLOPHON

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

NAME         top

       libpfm_intel_x86_arch - support for Intel X86 architectural PMU

SYNOPSIS         top

       #include <perfmon/pfmlib.h>
       PMU name: ix86arch
       PMU desc: Intel X86 architectural PMU

DESCRIPTION         top

       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         top

       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         top

       Stephane Eranian <eranian@gmail.com>

COLOPHON         top

       This page is part of the perfmon2 (a performance monitoring library)
       project.  Information about the project can be found at 
       ⟨http://perfmon2.sourceforge.net/⟩.  If you have a bug report for this
       manual page, send it to perfmon2-devel@lists.sourceforge.net.  This
       page was obtained from the project's upstream Git repository 
       ⟨git://git.code.sf.net/p/perfmon2/libpfm4⟩ on 2017-07-05.  If you dis‐
       cover any rendering problems in this HTML version of the page, or you
       believe there is a better or more up-to-date source for the page, or
       you have corrections or improvements to the information in this
       COLOPHON (which is not part of the original manual page), send a mail
       to man-pages@man7.org
                               September, 2009                     LIBPFM(3)