LIBPFM(3) Linux Programmer's Manual LIBPFM(3)
NAME
libpfm_intel_knc - support for Intel Knights Corner
SYNOPSIS
#include <perfmon/pfmlib.h>
PMU name: knc
PMU desc: Intel Knights Corner
DESCRIPTION
The library supports Intel Knights Corner processors.
MODIFIERS
The following modifiers are supported on Intel Knights Corner processors:
u Measure at user level which includes privilege levels 1, 2, 3. This corresponds to PFM_PLM3. This is a boolean modifier.
k Measure at kernel level which includes privilege level 0. This corresponds to PFM_PLM0. This is a boolean modifier.
i Invert the meaning of the event. The counter will now count 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. This is a boolean modifier.
c Set the counter mask value. The mask acts as a threshold. The counter will count the number of cycles in which the number of occur-
rences of the event is greater or equal to the threshold. This is an integer modifier with values in the range [0:255].
t Measure on all threads at the same time assuming hyper-threading is enabled. This is a boolean modifier.
AUTHORS
Stephane Eranian <eranian@gmail.com>
September, 2012 LIBPFM(3)
