libpfm_intel_snbep_unc_qpi(3) — Linux manual page
LIBPFM(3) Linux Programmer's Manual LIBPFM(3)
NAME
libpfm_intel_snbep_unc_qpi - support for Intel Sandy Bridge-EP
QPI uncore PMU
SYNOPSIS
#include <perfmon/pfmlib.h>
PMU name: snbep_unc_qpi0, snbep_unc_qpi1
PMU desc: Intel Sandy Bridge-EP QPI uncore PMU
DESCRIPTION
The library supports the Intel Sandy Bridge Power QPI uncore PMU.
This PMU model only exists on Sandy Bridge model 45. There are
two QPI PMUs per processor socket.
MODIFIERS
The following modifiers are supported on Intel Sandy Bridge QPI
uncore PMU:
i Invert the meaning of the event. The counter will now
count QPI 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 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 QPI 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].
AUTHORS
Stephane Eranian <eranian@gmail.com>
COLOPHON
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 perfmon2-libpfm4⟩ on
2024-06-14. (At that time, the date of the most recent commit
that was found in the repository was 2024-04-24.) If you
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