libpfm_intel_bdx_unc_qpi - support for Intel Broadwell Server QPI
uncore PMU
#include <perfmon/pfmlib.h>
PMU name: bdx_unc_qpi0, bdx_unc_qpi1
PMU desc: Intel Broadwell Server QPI uncore PMU
The library supports the Intel Broadwell Server QPI uncore PMU.
This PMU model only exists on various Broadwell server models (79, 86).
The following modifiers are supported on Broadwell server QPI
uncore PMU:
- 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].
- i
- Invert the meaning of the threshold or edge filter. If set, the event
counts when strictly less than N occurrences occur per cycle if threshold
is set to N. When invert is set, then threshold must be set to non-zero
value. If set, the event counts when the event transitions from occurring
to not occurring (falling edge) when edge detection is set. This is a
boolean modifier
Stephane Eranian <eranian@gmail.com>