NAME¶
libpfm_intel_skx_unc_ubo - support for Intel Skylake X Server IIO uncore PMU
SYNOPSIS¶
#include <perfmon/pfmlib.h>
PMU name: skx_unc_iio[0-5]
PMU desc: Intel Skylake X Server IIO uncore PMU
DESCRIPTION¶
The library supports the Intel Skylake X server IIO uncore PMU. The IIO PMU is
used to analyze I/O traffic from the PCIe controllers.
MODIFIERS¶
The following modifiers are supported on Intel Skylake X server IIO 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 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 [0:15].
- 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
Filters¶
Events UNC_IO_COMP_BUF_INSERTS, UNC_IO_DATA_REQ_BY_CPU, UNC_IO_DATA_REQ_OF_CPU,
support additional filtering via a set of umasks tracking requests
completions. They umasks start with a FC_ prefix. The other filter is the port
filter and it is hardcoded as umasks for the same events.
AUTHORS¶
Stephane Eranian <eranian@gmail.com>
