1LIBPFM(3)                  Linux Programmer's Manual                 LIBPFM(3)
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NAME

6       libpfm_intel_x86_arch - support for Intel X86 architectural PMU
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SYNOPSIS

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

16       The library supports any processor implementing the Intel architectural
17       PMU. This is a minimal PMU with a variable number of counters but  pre‐
18       defined  set  of  events.  It  is  implemented in all recent processors
19       starting with Intel Core Duo/Core Solo.
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21       It acts as a default PMU support in case the library is run on  a  very
22       recent processor for which the specific support has not yet been imple‐
23       mented.
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MODIFIERS

26       The following modifiers are supported on Intel architectural PMU:
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28       u      Measure at user level which includes privilege levels 1,  2,  3.
29              This corresponds to PFM_PLM3.  This is a boolean modifier.
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31       k      Measure  at  kernel level which includes privilege level 0. This
32              corresponds to PFM_PLM0.  This is a boolean modifier.
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34       i      Invert the meaning of the event.  The  counter  will  now  count
35              cycles  in  which  the event is not occurring. This is a boolean
36              modifier
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38       e      Enable edge detection, i.e., count only when there  is  a  state
39              transition. This is a boolean modifier.
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41       c      Set  the  counter  mask value. The mask acts as a threshold. The
42              counter will count the number of cycles in which the  number  of
43              occurrences  of  the event is greater or equal to the threshold.
44              This is an integer modifier with values in the range [0:255].
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46       t      Measure on both threads at the same time assuming  hyper-thread‐
47              ing is enabled. This modifier requires at least version 3 of the
48              architectural PMU. This is a boolean modifier.
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AUTHORS

52       Stephane Eranian <eranian@gmail.com>
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56                                September, 2009                      LIBPFM(3)