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NAME | SYNOPSIS | DESCRIPTION | MODIFIERS | AUTHORS | COLOPHON |
LIBPFM(3) Linux Programmer's Manual LIBPFM(3)
libpfm_intel_snbep_unc_ha - support for Intel Sandy Bridge-EP Home
Agent (HA) uncore PMU
#include <perfmon/pfmlib.h>
PMU name: snbep_unc_ha
PMU desc: Intel Sandy Bridge-EP HA uncore PMU
The library supports the Intel Sandy Bridge Home Agent (HA) uncore
PMU. This PMU model only exists on Sandy Bridge model 45. There is
only one Home Agent per processor socket.
The following modifiers are supported on Intel Sandy Bridge C-Box
uncore PMU:
i Invert the meaning of the event. The counter will now count HA
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 HA 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].
Stephane Eranian <eranian@gmail.com>
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
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⟨git://git.code.sf.net/p/perfmon2/libpfm4⟩ on 2017-07-05. If you dis‐
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COLOPHON (which is not part of the original manual page), send a mail
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August, 2012 LIBPFM(3)