# pmdadenki

## NAME



           **pmdadenki** - metrics related to the systems electrical consumption
    


## SYNOPSIS



           **$PCP_PMDAS_DIR/denki/pmdadenki**[**-D** _debug_] [**-d** _domain_] [**-l** _logfile_]
    


## DESCRIPTION



           **pmdadenki** is a Performance Metrics Domain Agent (PMDA) which
           extracts electricity related performance metrics.
    
           Currently, metrics from the Running Average Power Limit (RAPL)
           Intel CPU feature, and battery charge values are available, if
           supported by the hardware.
    
           **-l** Location of the log file.  By default, a log file named
           _denki.log_ is written in the current directory of pmcd(1) when
           **pmdadenki** is started, i.e.  **$PCP_LOG_DIR/pmcd**.  If the log file
           cannot be created or is not writable, output is written to the
           standard error instead.
    


## INSTALLATION



           The **denki** PMDA is installed and available by default on Linux.  If
           you want to undo the installation, do the following as root:
    
                # cd $PCP_PMDAS_DIR/denki
                # ./Remove
    
           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:
    
                # cd $PCP_PMDAS_DIR/denki
                # ./Install
    
           **pmdadenki** is launched by pmcd(1) and should never be executed
           directly.  The Install and Remove scripts notify pmcd(1) when the
           agent is installed or removed.
    


## FILES



           **$PCP_PMCDCONF_PATH**
                  command line options used to launch **pmdadenki**
           **$PCP_PMDAS_DIR/denki/help**
                  default help text file for the denki metrics
           **$PCP_PMDAS_DIR/denki/Install**
                  installation script for the **pmdadenki** agent
           **$PCP_PMDAS_DIR/denki/Remove**
                  undo installation script for the **pmdadenki** agent
           **$PCP_LOG_DIR/pmcd/denki.log**
                  default log file for error messages and other information
                  from **pmdadenki**
    


## PCP ENVIRONMENT



           Environment variables with the prefix **PCP_** are used to
           parameterize the file and directory names used by PCP.  On each
           installation, the file _/etc/pcp.conf_ contains the local values for
           these variables.  The **$PCP_CONF** variable may be used to specify an
           alternative configuration file, as described in pcp.conf(5).
    


## DEBUGGING OPTIONS



           The **-D** or **--debug** option enables the output of additional
           diagnostics on _stderr_ to help triage problems, although the
           information is sometimes cryptic and primarily intended to provide
           guidance for developers rather end-users.  _debug_ is a comma
           separated list of debugging options; use pmdbg(1) with the **-l**
           option to obtain a list of the available debugging options and
           their meaning.
    
           Debugging options specific to **pmdadenki** are as follows:
           ┌────────┬─────────────────────┐
           │ **Option** │ **Description** │
           ├────────┼─────────────────────┤
           │ **appl0** │ verbose diagnostics │
           └────────┴─────────────────────┘
    


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