libpfm_intel_core - support for Intel Core-based processors
#include <perfmon/pfmlib.h>
PMU name: core
PMU desc: Intel Core
The library supports all Intel Core-based processors that includes
models 15, 23, 29.
The following modifiers are supported on Intel Core
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
from no occurrence of the event to at least one occurrence. This modifier
must be combined with a counter mask modifier (m) with a value greater or
equal to one. 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 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>