'\"macro stdmacro
.\"
.\" Copyright (c) 2017, 2023 Red Hat.
.\"
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.\" under the terms of the GNU General Public License as published by the
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.ds ia resctrl
.ds IA RESCTRL
.ds Ia Resctrl
.TH PMDARESCTRL 1 "PCP" "Performance Co-Pilot"
.SH NAME
\f3pmdaresctrl\f1 \- \*(ia performance metrics domain agent (PMDA)
.SH SYNOPSIS
\f3$PCP_PMDAS_DIR/pmda\*(ia\f1
[\f3\-D\f1 \f2debug\f1]
[\f3\-d\f1 \f2domain\f1]
[\f3\-l\f1 \f2logfile\f1]
.SH DESCRIPTION
.B pmda\*(ia
is a \*(ia Performance Metrics Domain Agent (PMDA) which exposes
performance metrics values from the /sys/fs/resctrl interface to
provide information on the last level cache.

.in
.PP
Further details on linux support for last level cache metrics can be found at
.BR https://github.com/torvalds/linux/tree/master/Documentation/arch/x86/resctrl.rst .
.SH INSTALLATION
If you want access to the names, help text and values for the \*(ia
performance metrics, do the following as root:
.PP
.ft CR
.nf
.in +0.5i
# cd $PCP_PMDAS_DIR/\*(ia
# ./Install
.in
.fi
.ft 1
.PP
If you want to undo the installation (and remove both PMDAs),
do the following as root:
.PP
.ft CR
.nf
.in +0.5i
# cd $PCP_PMDAS_DIR/\*(ia
# ./Remove
.in
.fi
.ft 1
.PP
.B pmda\*(ia
is launched by
.BR pmcd (1)
and should never be executed directly.
The Install and Remove scripts notify
.BR pmcd (1)
when the agent is installed or removed.
.SH FILES
.PD 0
.TP 10
.B $PCP_PMCDCONF_PATH
command line options used to launch
.B pmda\*(ia
.TP 10
.B $PCP_PMDAS_DIR/\*(ia/help
default help text file for the \*(ia metrics
.TP 10
.B $PCP_PMDAS_DIR/\*(ia/Install
installation script for the
.B pmda\*(ia
agent
.TP 10
.B $PCP_PMDAS_DIR/\*(ia/Remove
undo installation script for the
.B pmda\*(ia
agent
.PD
.SH "PCP ENVIRONMENT"
Environment variables with the prefix
.B PCP_
are used to parameterize the file and directory names
used by PCP.
On each installation, the file
.B /etc/pcp.conf
contains the local values for these variables.
The
.B $PCP_CONF
variable may be used to specify an alternative
configuration file,
as described in
.BR pcp.conf (5).
In particular, the
.B $PCP_RESCTRL_DIR
may be set to change the default directory from
.BR /sys/fs/resctrl .
.SH DEBUGGING OPTIONS
The
.B \-D
or
.B \-\-debug
option enables the output of additional diagnostics on
.I stderr
to help triage problems, although the information is sometimes cryptic and
primarily intended to provide guidance for developers rather end-users.
.I debug
is a comma separated list of debugging options; use
.BR pmdbg (1)
with the
.B \-l
option to obtain
a list of the available debugging options and their meaning.
.SH SEE ALSO
.BR PCPIntro (1),
.BR pmcd (1),
.BR pcp.conf (5),
.BR pcp.env (5)
and
.BR resctrl (1).

.\" control lines for scripts/man-spell
.\" +ok+ PCP_RESCTRL_DIR pmdaresctrl torvalds RESCTRL Resctrl resctrl github
.\" +ok+ linux rst sys fs {from /sys/fs/resctrl}