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.\" Copyright (c) 2010 Fabien Thomas. All rights reserved.
.\"
.\" Redistribution and use in source and binary forms, with or without
.\" modification, are permitted provided that the following conditions
.\" are met:
.\" 1. Redistributions of source code must retain the above copyright
.\" notice, this list of conditions and the following disclaimer.
.\" 2. Redistributions in binary form must reproduce the above copyright
.\" notice, this list of conditions and the following disclaimer in the
.\" documentation and/or other materials provided with the distribution.
.\"
.\" This software is provided by Joseph Koshy ``as is'' and
.\" any express or implied warranties, including, but not limited to, the
.\" implied warranties of merchantability and fitness for a particular purpose
.\" are disclaimed. in no event shall Joseph Koshy be liable
.\" for any direct, indirect, incidental, special, exemplary, or consequential
.\" damages (including, but not limited to, procurement of substitute goods
.\" or services; loss of use, data, or profits; or business interruption)
.\" however caused and on any theory of liability, whether in contract, strict
.\" liability, or tort (including negligence or otherwise) arising in any way
.\" out of the use of this software, even if advised of the possibility of
.\" such damage.
.\"
.\" $FreeBSD$
.\"
.Dd March 30, 2010
.Dt PMC.UCF 3
.Os
.Sh NAME
.Nm pmc.ucf
.Nd measurement events for
.Tn Intel
uncore fixed function performance counters.
.Sh LIBRARY
.Lb libpmc
.Sh SYNOPSIS
.In pmc.h
.Sh 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
.Xr pmc_cpuinfo 3 .
.Pp
Intel uncore fixed-function PMCs are documented in
.Rs
.%B "Intel(R) 64 and IA-32 Architectures Software Developes Manual"
.%T "Volume 3B: System Programming Guide, Part 2"
.%N "Order Number: 253669-033US"
.%D December 2009
.%Q "Intel Corporation"
.Re
.Pp
.Ss PMC Capabilities
Fixed-function PMCs support the following capabilities:
.Bl -column "PMC_CAP_INTERRUPT" "Support"
.It Em Capability Ta Em Support
.It PMC_CAP_CASCADE Ta \&No
.It PMC_CAP_EDGE Ta \&No
.It PMC_CAP_INTERRUPT Ta \&No
.It PMC_CAP_INVERT Ta \&No
.It PMC_CAP_READ Ta Yes
.It PMC_CAP_PRECISE Ta \&No
.It PMC_CAP_SYSTEM Ta \&No
.It PMC_CAP_TAGGING Ta \&No
.It PMC_CAP_THRESHOLD Ta \&No
.It PMC_CAP_USER Ta \&No
.It PMC_CAP_WRITE Ta Yes
.El
.Ss Class Name Prefix
These PMCs are named using a class name prefix of
.Dq Li ucf- .
.Ss Event Specifiers (Fixed Function PMCs)
The fixed function PMCs are selectable using the following
event names:
.Bl -tag -width indent
.It Li UCLOCK
.Pq 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.
.El
.Sh SEE ALSO
.Xr pmc 3 ,
.Xr pmc.atom 3 ,
.Xr pmc.core 3 ,
.Xr pmc.core2 3 ,
.Xr pmc.iaf 3 ,
.Xr pmc.k7 3 ,
.Xr pmc.k8 3 ,
.Xr pmc.p4 3 ,
.Xr pmc.p5 3 ,
.Xr pmc.p6 3 ,
.Xr pmc.corei7 3 ,
.Xr pmc.corei7uc 3 ,
.Xr pmc.westmere 3 ,
.Xr pmc.westmereuc 3 ,
.Xr pmc.tsc 3 ,
.Xr pmc_cpuinfo 3 ,
.Xr pmclog 3 ,
.Xr hwpmc 4
.Sh HISTORY
The
.Nm pmc
library first appeared in
.Fx 6.0 .
.Sh AUTHORS
The
.Lb libpmc
library was written by
.An "Joseph Koshy"
.Aq jkoshy@FreeBSD.org .
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