NAME¶
libpfm_intel_snbep_unc_ha - support for Intel Sandy Bridge-EP Home Agent (HA)
uncore PMU
SYNOPSIS¶
#include <perfmon/pfmlib.h>
PMU name: snbep_unc_ha
PMU desc: Intel Sandy Bridge-EP HA uncore PMU
DESCRIPTION¶
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.
MODIFIERS¶
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].
AUTHORS¶
Stephane Eranian <eranian@gmail.com>