LIBPFM(3)

NAME
libpfm_intel_spr_unc_upi - support for Intel SapphireRapids Server UPI uncore PMU

SYNOPSIS
#include <perfmon/pfmlib.h>

PMU name: spr_unc_upi[0-3]
PMU desc: Intel SapphireRapids UPI uncore PMU

DESCRIPTION
The library supports the Intel SapphireRapids UPI (Ultra Path Interconnect) uncore PMU. Each UPI PMU implements 4 generic counters.

MODIFIERS
The following modifiers are supported on Intel SapphireRapids UPI 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 IRP clockticks 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 threshold (t) test from strictly greater than to less or equal to. This is a boolean modifier.

AUTHORS
Stephane Eranian <eranian@gmail.com>