libpfm_intel_snbep_unc_r3qpi - support for Intel Sandy Bridge-EP
R3QPI uncore PMU
#include <perfmon/pfmlib.h>
PMU name: snbep_unc_r3qpi0, snbep_unc_r3qpi0
PMU desc: Intel Sandy Bridge-EP R3QPI uncore PMU
The library supports the Intel Sandy Bridge R3QPI uncore PMU. This
PMU model only exists on Sandy Bridge model 45. There are two R3QPI PMUs per
processor socket.
The following modifiers are supported on Intel Sandy Bridge R3PQI
uncore PMU:
- i
- Invert the meaning of the event. The counter will now count R3QPI 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 R3QPI 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 [0:15].
Stephane Eranian <eranian@gmail.com>