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.TH PMDADENKI 1 "PCP" "Performance Co-Pilot"
.SH NAME
\f3pmdadenki\f1 \- metrics related to the systems electrical consumption
.SH SYNOPSIS
\f3$PCP_PMDAS_DIR/denki/pmdadenki\f1
[\f3\-D\f1 \f2debug\f1]
[\f3\-d\f1 \f2domain\f1]
[\f3\-l\f1 \f2logfile\f1]
.SH DESCRIPTION
.B pmdadenki
is a Performance Metrics Domain Agent (PMDA) which extracts
electricity related performance metrics.
.PP
Currently, metrics from the Running Average Power Limit (RAPL)
Intel CPU feature, and battery charge values are available, if
supported by the hardware.
.PP
.B \-l
Location of the log file.
By default, a log file named
.I denki.log
is written in the current directory of
.BR pmcd (1)
when
.B pmdadenki
is started, i.e.
.BR $PCP_LOG_DIR/pmcd .
If the log file cannot be created or is not writable, output is
written to the standard error instead.
.SH "INSTALLATION"
The
.B denki
PMDA is installed and available by default on Linux.
If you want to undo the installation, do the following as root:
.PP
.ft CR
.nf
.in +0.5i
# cd $PCP_PMDAS_DIR/denki
# ./Remove
.in
.fi
.ft 1
.PP
If you want to establish access to the names, help text and values for the
denki metrics once more, after removal, do the following as root:
.PP
.ft CR
.nf
.in +0.5i
# cd $PCP_PMDAS_DIR/denki
# ./Install
.in
.fi
.ft 1
.PP
.B pmdadenki
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 pmdadenki
.TP 10
.B $PCP_PMDAS_DIR/denki/help
default help text file for the denki metrics
.TP 10
.B $PCP_PMDAS_DIR/denki/Install
installation script for the
.B pmdadenki
agent
.TP 10
.B $PCP_PMDAS_DIR/denki/Remove
undo installation script for the
.B pmdadenki
agent
.TP 10
.B $PCP_LOG_DIR/pmcd/denki.log
default log file for error messages and other information from
.B pmdadenki
.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
.I /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).
.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.
.PP
Debugging options specific to
.B pmdadenki
are as follows:
.TS
box;
lf(B) | lf(B)
lf(B) | lf(R) .
Option	Description
_
appl0	verbose diagnostics
.TE
.SH "SEE ALSO"
.BR PCPIntro (1),
.BR pmcd (1),
.BR denki/README file
.BR pcp.conf (5)
and
.BR pcp.env (5).

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