Manual Pages — PMC.UCF

NAME

pmc.ucf – measurement events for Intel uncore fixed function performance counters.

LIBRARY
SYNOPSIS
DESCRIPTION

PMC Capabilities
Class Name Prefix
Event Specifiers (Fixed Function PMCs)

SEE ALSO
HISTORY
AUTHORS

LIBRARY

Performance Counters Library (libpmc, -lpmc)

SYNOPSIS

#include <pmc.h>

DESCRIPTION

Each fixed-function PMC measures a specific hardware event. The number of fixed-function PMCs implemented in a CPU can vary. The number of fixed-function PMCs present can be determined at runtime by using function pmc_cpuinfo(3).

Intel uncore fixed-function PMCs are documented in

Intel(R) 64 and IA-32 Architectures Software Developes Manual, Intel Corporation, Order Number: 253669-033US, Volume 3B: System Programming Guide, Part 2, December 2009.

PMC Capabilities

Fixed-function PMCs support the following capabilities:

Capability	Support
PMC_CAP_CASCADE	amp;No
PMC_CAP_EDGE	amp;No
PMC_CAP_INTERRUPT	amp;No
PMC_CAP_INVERT	amp;No
PMC_CAP_READ	Yes
PMC_CAP_PRECISE	amp;No
PMC_CAP_SYSTEM	amp;No
PMC_CAP_TAGGING	amp;No
PMC_CAP_THRESHOLD	amp;No
PMC_CAP_USER	amp;No
PMC_CAP_WRITE	Yes

Class Name Prefix

These PMCs are named using a class name prefix of "ucf-".

Event Specifiers (Fixed Function PMCs)

The fixed function PMCs are selectable using the following event names:

UCLOCK (Fixed Function Counter 0) The fixed-function uncore counter increments at the rate of the U-clock. The frequency of the uncore clock domain can be determined from the uncore clock ratio which is available in the PCI configuration space register at offset C0H under device number 0 and Function 0.